The working conditions of plastic molds are different from those of cold stamping dies. Generally, they must work at 150 degrees Celsius to 200 degrees Celsius. In addition to being subjected to a certain pressure, they also have to withstand temperature. According to the different use conditions and processing methods of plastic molding molds, the basic performance requirements of plastic mold steel are now required. The functions introduced by 20L Pail Mould Suppliers are as follows:
1. Excellent machinability. In addition to EMD processing, most plastic molding molds require certain cutting processing and fitter repair. In order to extend the service life of cutting tools, enhance cutting performance, and reduce surface roughness, the hardness of the steel used for plastic molds must be appropriate.
2. Good thermal stability. The shape of the parts of the plastic injection mold is often complicated and difficult to process after quenching. Therefore, it should be used as far as possible to have good thermal stability. When the two-color mold is formed by heat treatment, the linear expansion coefficient is small. The deformation is small, the dimensional change rate caused by the temperature difference is small, the metallographic structure and the mold size are stable, and the processing can be reduced or no longer needed to ensure the dimensional accuracy and surface roughness requirements of the mold.
3. Good polishing performance, high-quality two-color injection molded plastic products, require a small value of roughness on the surface of the cavity. For example, the surface roughness value of the injection mold cavity is required to be less than Ra0.1～0.25, and the optical surface requires Ra
1. Excellent machinability. In addition to EMD processing, most plastic molding molds require certain cutting processing and fitter repair. In order to extend the service life of cutting tools, enhance cutting performance, and reduce surface roughness, the hardness of the steel used for plastic molds must be appropriate.
2. Good thermal stability. The shape of the parts of the plastic injection mold is often complicated and difficult to process after quenching. Therefore, it should be used as far as possible to have good thermal stability. When the two-color mold is formed by heat treatment, the linear expansion coefficient is small. The deformation is small, the dimensional change rate caused by the temperature difference is small, the metallographic structure and the mold size are stable, and the processing can be reduced or no longer needed to ensure the dimensional accuracy and surface roughness requirements of the mold.
3. Good polishing performance, high-quality two-color injection molded plastic products, require a small value of roughness on the surface of the cavity. For example, the surface roughness value of the injection mold cavity is required to be less than Ra0.1～0.25, and the optical surface requires Ra
Paint Pail Mould Suppliers introduced that plastic product bursting is a quality problem that often occurs in injection molded parts processing manufacturers. This nature is very serious. It is mainly caused by how the black material bursts. Customers generally doubt whether it is the nozzle material. too much. Because the filler material is a cause of bursting.
There is also a kind of burst with just a light press. The position is mainly the bonding line, that is, when the injection point is designed by the injection molding manufacturer, the welding line is not designed in place, and the welding line is made on the top with the bump. It also depends on the thinner position outside. Especially in the production of ABS materials, it is easy to break. An experienced design engineer will first review the glue inlet point, and then drive the weld line to a position where it will not burst.
After the injection molding employees of the injection molding parts processing factory left their jobs for more than 20 minutes, when they returned to the job, they did not shoot out the waste rubber that had been in the barrel for too long and caused the deterioration of the rubber. If it is produced directly, it will also cause a burst. In this case, it is more difficult to analyze the quality.
Through the above introduction, China 20L Pail Mould Factory hopes that you can simply refer to the content of this article in future use.
https://www.rixiangmould.com/
There is also a kind of burst with just a light press. The position is mainly the bonding line, that is, when the injection point is designed by the injection molding manufacturer, the welding line is not designed in place, and the welding line is made on the top with the bump. It also depends on the thinner position outside. Especially in the production of ABS materials, it is easy to break. An experienced design engineer will first review the glue inlet point, and then drive the weld line to a position where it will not burst.
After the injection molding employees of the injection molding parts processing factory left their jobs for more than 20 minutes, when they returned to the job, they did not shoot out the waste rubber that had been in the barrel for too long and caused the deterioration of the rubber. If it is produced directly, it will also cause a burst. In this case, it is more difficult to analyze the quality.
Through the above introduction, China 20L Pail Mould Factory hopes that you can simply refer to the content of this article in future use.
https://www.rixiangmould.com/
Paint Pail Mould Suppliers introduced that shrinkage in plastic processing is one of the most common problems in plastic processing. For plastic products that require high surface quality, shrinkage is even more difficult. Therefore, with the continuous improvement of plastic processing technology, in order to minimize the shrinkage of plastic processing, it is imperative to improve product quality.
In plastic processing, injection molded plastic parts are thicker, such as ribs or protrusions, that are more severely contracted than adjacent locations. This is because the cooling rate of the thicker area is much slower than that of the surrounding area. The difference in cooling rate results in the formation of depressions at the connecting surface, which are known as shrinkage marks. This defect severely restricts the design and molding of plastic products, especially large thick-walled products such as beveled cabinets and display housings for televisions. In fact, it is necessary to eliminate shrinkage marks on products with strict requirements such as household appliances, while plastic processing shrinkage marks are allowed for some products with low surface quality requirements such as toys.
There may be one or more reasons for plastic processing shrinkage marks, including processing methods, part geometry, material selection, and mold design. The geometry and material selection are usually determined by the raw material supplier and are not easy to change. However, there are still many factors related to mold design on the mold manufacturer’s side that may affect the shrinkage of plastic processing. Cooling runner design, gate type, and gate size may have multiple effects. For example, small gates such as tube gates cool much faster than tapered gates. Premature cooling at the gate will reduce the filling time in the cavity, thereby increasing the chance of shrinkage marks. For molding workers, adjusting processing conditions is a way to solve the shrinkage problem of plastic processing. Filling pressure and time significantly affect shrinkage. After the part is filled, the excess material continues to be filled into the cavity to compensate for the shrinkage of the material. Too short a filling stage will result in increased shrinkage and eventually produce more or larger shrinkage marks. This method of solving plastic processing shrinkage may not reduce the shrinkage mark to a satisfactory level, but the molding worker can adjust the filling conditions to improve the shrinkage mark.
Through the above introduction, China 20L Pail Mould Manufacturers hopes that you can simply refer to the content of this article in future use.
https://www.rixiangmould.com/
In plastic processing, injection molded plastic parts are thicker, such as ribs or protrusions, that are more severely contracted than adjacent locations. This is because the cooling rate of the thicker area is much slower than that of the surrounding area. The difference in cooling rate results in the formation of depressions at the connecting surface, which are known as shrinkage marks. This defect severely restricts the design and molding of plastic products, especially large thick-walled products such as beveled cabinets and display housings for televisions. In fact, it is necessary to eliminate shrinkage marks on products with strict requirements such as household appliances, while plastic processing shrinkage marks are allowed for some products with low surface quality requirements such as toys.
There may be one or more reasons for plastic processing shrinkage marks, including processing methods, part geometry, material selection, and mold design. The geometry and material selection are usually determined by the raw material supplier and are not easy to change. However, there are still many factors related to mold design on the mold manufacturer’s side that may affect the shrinkage of plastic processing. Cooling runner design, gate type, and gate size may have multiple effects. For example, small gates such as tube gates cool much faster than tapered gates. Premature cooling at the gate will reduce the filling time in the cavity, thereby increasing the chance of shrinkage marks. For molding workers, adjusting processing conditions is a way to solve the shrinkage problem of plastic processing. Filling pressure and time significantly affect shrinkage. After the part is filled, the excess material continues to be filled into the cavity to compensate for the shrinkage of the material. Too short a filling stage will result in increased shrinkage and eventually produce more or larger shrinkage marks. This method of solving plastic processing shrinkage may not reduce the shrinkage mark to a satisfactory level, but the molding worker can adjust the filling conditions to improve the shrinkage mark.
Through the above introduction, China 20L Pail Mould Manufacturers hopes that you can simply refer to the content of this article in future use.
https://www.rixiangmould.com/
Plastic molds are the key special tools for forming plastic products. If the quality of the mold changes, for example, the shape changes, the position moves, the molding surface becomes rough, and the contact of the clamping surface is not strict, it will directly affect the quality of the plastic product. Therefore, we must pay attention to the use and maintenance of the mold. Next, Paint Pail Mould Manufacturers introduces the use and maintenance requirements of plastic molds:
(1) Before production, check whether there are impurities in each part of the mold. Dirt, the paint, impurities and dirt in the mold should be scrubbed and removed with cotton gauze, and the residue with a strong bond should be cleaned up with a copper knife.
(2) Choose the clamping force reasonably, based on the fact that there is no flash when the product is formed. Excessive clamping force not only increases power consumption, but also easily accelerates the wear rate of the mold and transmission parts.
(3) Mould sliding parts such as guide posts, push rods, reset rods, pull rods, etc., should be oiled twice a day in summer and only once in winter.
(4) When a full-time mold preservation worker is on duty, the molds in production shall be inspected and observed rovingly, and any problems shall be dealt with in time. The maintenance worker should be on duty 5-10 minutes before taking over to check the mold production status-especially for those molds that often have inferior products, and those with more problems and more prominent molds, you should pay more attention to them.
(5) During production, if there is a power outage or shutdown due to some reasons, if the machine stops continuously for more than 6 hours, in the rainy season in the south, the air is humid, and it is necessary to spray anti-rust oil on the molding surface, parting surface, and sliding surface. In non-rainy season, if the machine stops continuously for more than 24 hours, it is necessary to spray anti-rust lubricant on the mold forming surface, parting surface, and sliding mating surface. The molds that are not in use temporarily and need to be put in the inventory shall be thoroughly cleaned before being put into the warehouse, and then sprayed with anti-rust lubricant, and the molds shall be put into the warehouse after being tightened. No heavy objects are allowed on the mold.
(6) Do not hit any parts in the mold with a hand hammer to prevent knock marks or deformation.
(7) The equipment is temporarily not used, and the mold on the injection should be coated with anti-rust oil. The movable and fixed molds are not allowed to stay in a pressured clamping state for a long time to prevent deformation under pressure.
https://www.rixiangmould.com/
(1) Before production, check whether there are impurities in each part of the mold. Dirt, the paint, impurities and dirt in the mold should be scrubbed and removed with cotton gauze, and the residue with a strong bond should be cleaned up with a copper knife.
(2) Choose the clamping force reasonably, based on the fact that there is no flash when the product is formed. Excessive clamping force not only increases power consumption, but also easily accelerates the wear rate of the mold and transmission parts.
(3) Mould sliding parts such as guide posts, push rods, reset rods, pull rods, etc., should be oiled twice a day in summer and only once in winter.
(4) When a full-time mold preservation worker is on duty, the molds in production shall be inspected and observed rovingly, and any problems shall be dealt with in time. The maintenance worker should be on duty 5-10 minutes before taking over to check the mold production status-especially for those molds that often have inferior products, and those with more problems and more prominent molds, you should pay more attention to them.
(5) During production, if there is a power outage or shutdown due to some reasons, if the machine stops continuously for more than 6 hours, in the rainy season in the south, the air is humid, and it is necessary to spray anti-rust oil on the molding surface, parting surface, and sliding surface. In non-rainy season, if the machine stops continuously for more than 24 hours, it is necessary to spray anti-rust lubricant on the mold forming surface, parting surface, and sliding mating surface. The molds that are not in use temporarily and need to be put in the inventory shall be thoroughly cleaned before being put into the warehouse, and then sprayed with anti-rust lubricant, and the molds shall be put into the warehouse after being tightened. No heavy objects are allowed on the mold.
(6) Do not hit any parts in the mold with a hand hammer to prevent knock marks or deformation.
(7) The equipment is temporarily not used, and the mold on the injection should be coated with anti-rust oil. The movable and fixed molds are not allowed to stay in a pressured clamping state for a long time to prevent deformation under pressure.
https://www.rixiangmould.com/
Toughness Of Plastic Pail Mould
2021年9月9日 1. Rubber injection mold: Rubber injection molding is a production method in which rubber is injected directly from the barrel into the mold to vulcanize. The advantages of rubber Plastic Pail Mould are: although it is an intermittent operation, the molding cycle is short, the production efficiency is high, the blank preparation process is eliminated, the labor intensity is small, and the product quality is excellent.
2. Plastic injection: Plastic injection is a method of plastic products. The molten plastic is injected into the plastic product mold by pressure, and then cooled and molded to obtain various plastic parts. There are mechanical injection molding machines dedicated to injection molding. The most commonly used plastics are polyethylene, polypropylene, ABS, PA, polystyrene, etc.
3. Molding and injection molding: The resulting shape is often the final product, and no other processing is required before installation or use as the final product. Many details, such as protrusions, ribs, and threads, can be formed in one step of injection molding.
The mould steel should meet the following working conditions:
4. Abrasion resistance
When the melt plastic material is deformed in the mold cavity, it flows and slides along the surface of the cavity, causing violent friction between the surface of the cavity and plastic, which causes the mold to fail due to wear. Therefore, the wear resistance of the material is one of the basic and important properties of the mold.
Hardness is the main factor affecting wear resistance. In general, the higher the hardness of the mold parts, the smaller the amount of wear and the better the wear resistance. In addition, wear resistance is also related to the type, quantity, shape, size and distribution of carbides in the material.
5. Toughness
The working conditions of the molds are mostly very bad, and some of them are often subjected to larger impact loads, which leads to brittle fracture. In order to prevent sudden brittle fracture of mold parts during work, the mold must have high strength and toughness. The toughness of the mold mainly depends on the carbon content, grain size and organization state of the material.
6. Fatigue fracture performance
In the process of mold work, under the long-term action of cyclic stress, fatigue fracture is often caused. Its forms include low-energy multiple impact fatigue fracture, tensile fatigue fracture, contact fatigue fracture, and bending fatigue fracture. The fatigue fracture performance of the mold mainly depends on its strength, toughness, hardness, and the content of inclusions in the material.
7. High temperature performance
When the working temperature of the mold is higher, the hardness and strength will decrease, leading to early wear of the mold or plastic deformation and failure. Because the mold material should have high anti-tempering stability, to ensure that the mold has a high hardness and strength at the working temperature.
We are a professional molding company, sell different design of mold, Paint Pail Mould is one of them,welcome to visit our website.https://www.rixiangmould.com/
2. Plastic injection: Plastic injection is a method of plastic products. The molten plastic is injected into the plastic product mold by pressure, and then cooled and molded to obtain various plastic parts. There are mechanical injection molding machines dedicated to injection molding. The most commonly used plastics are polyethylene, polypropylene, ABS, PA, polystyrene, etc.
3. Molding and injection molding: The resulting shape is often the final product, and no other processing is required before installation or use as the final product. Many details, such as protrusions, ribs, and threads, can be formed in one step of injection molding.
The mould steel should meet the following working conditions:
4. Abrasion resistance
When the melt plastic material is deformed in the mold cavity, it flows and slides along the surface of the cavity, causing violent friction between the surface of the cavity and plastic, which causes the mold to fail due to wear. Therefore, the wear resistance of the material is one of the basic and important properties of the mold.
Hardness is the main factor affecting wear resistance. In general, the higher the hardness of the mold parts, the smaller the amount of wear and the better the wear resistance. In addition, wear resistance is also related to the type, quantity, shape, size and distribution of carbides in the material.
5. Toughness
The working conditions of the molds are mostly very bad, and some of them are often subjected to larger impact loads, which leads to brittle fracture. In order to prevent sudden brittle fracture of mold parts during work, the mold must have high strength and toughness. The toughness of the mold mainly depends on the carbon content, grain size and organization state of the material.
6. Fatigue fracture performance
In the process of mold work, under the long-term action of cyclic stress, fatigue fracture is often caused. Its forms include low-energy multiple impact fatigue fracture, tensile fatigue fracture, contact fatigue fracture, and bending fatigue fracture. The fatigue fracture performance of the mold mainly depends on its strength, toughness, hardness, and the content of inclusions in the material.
7. High temperature performance
When the working temperature of the mold is higher, the hardness and strength will decrease, leading to early wear of the mold or plastic deformation and failure. Because the mold material should have high anti-tempering stability, to ensure that the mold has a high hardness and strength at the working temperature.
We are a professional molding company, sell different design of mold, Paint Pail Mould is one of them,welcome to visit our website.https://www.rixiangmould.com/
High-temperature Plastic Pail Mould of medical equipment parts is an engineering plastic that is used in medical equipment, medical equipment, medical consumables or other engineering fields that require plastics to still have high mechanical properties and chemical resistance under high-temperature working environments. However, some high-temperature plastics are used in When it comes to medical equipment, it is not because of its high temperature resistance. Sometimes it is lightweight, self-lubricating and wear-resistant. When medical consumables need high temperature or steam sterilization, high temperature resistant plastics such as PPSU LCP and PES should also be considered.
The mechanical working conditions of ordinary PP and nylon are generally 100℃, and the general working temperature of PC is below 140℃. According to the plastics of different manufacturers, there is a certain gap in temperature resistance, especially some modified ordinary plastics and raw materials. The gap is more obvious.
High temperature resistant engineering injection molding plastic is a kind of plastic that can maintain its own relatively high mechanical properties under high temperature working environment due to its special structure. Most high temperature resistant plastics need high temperature injection molding during injection molding. This has higher temperature requirements for the heating system of the injection molding machine. In most injection molding machines, the barrel temperature of the default configuration is below 350 degrees.
Taizhou Huangyan Rixiang Mold & Plastics Co., Ltd is a professional plastic injection mold manufacturing enterprise located in Huangyan, Taizhou, the hometown of plastic molds in China. Mainly develop molds for pail moulds, packaging molds, daily necessities moulds, etc., and we supply turnkey solution for industrial packaging. Since The Company Established, we had provided many plastic pail molds for oil companies such as PetroChina, Sinopec and Weichai, and suppliers of paint manufacturers such as Nippon, Dulux and JOMO.
From the beginning to the end, we regard product quality and service as the foundation of the company’s development, and the cutting-edge facilities and professional and efficient work team are the pillars of development. In the design and manufacturing process of the mold, we have matured the seamless combination of CAD/CAE/CAM technology, using advanced feature modeling software such as PRO/E\UGII to determine the parting surface of the mold, and to generate the upper and lower cavity and mold. Core, and then the flow path, gate and cooling water pipe arrangement. We will adhere to the principle of first-class product quality, perfect mold design, advanced production and processing technology, reasonable production price, and excellent ability to deliver on time, to establish a good corporate reputation and serve the new and old customers.
We are a professional molding company, sell different design of mold, Paint Pail Mould is one of them,welcome to visit our website.https://www.rixiangmould.com/
The mechanical working conditions of ordinary PP and nylon are generally 100℃, and the general working temperature of PC is below 140℃. According to the plastics of different manufacturers, there is a certain gap in temperature resistance, especially some modified ordinary plastics and raw materials. The gap is more obvious.
High temperature resistant engineering injection molding plastic is a kind of plastic that can maintain its own relatively high mechanical properties under high temperature working environment due to its special structure. Most high temperature resistant plastics need high temperature injection molding during injection molding. This has higher temperature requirements for the heating system of the injection molding machine. In most injection molding machines, the barrel temperature of the default configuration is below 350 degrees.
Taizhou Huangyan Rixiang Mold & Plastics Co., Ltd is a professional plastic injection mold manufacturing enterprise located in Huangyan, Taizhou, the hometown of plastic molds in China. Mainly develop molds for pail moulds, packaging molds, daily necessities moulds, etc., and we supply turnkey solution for industrial packaging. Since The Company Established, we had provided many plastic pail molds for oil companies such as PetroChina, Sinopec and Weichai, and suppliers of paint manufacturers such as Nippon, Dulux and JOMO.
From the beginning to the end, we regard product quality and service as the foundation of the company’s development, and the cutting-edge facilities and professional and efficient work team are the pillars of development. In the design and manufacturing process of the mold, we have matured the seamless combination of CAD/CAE/CAM technology, using advanced feature modeling software such as PRO/E\UGII to determine the parting surface of the mold, and to generate the upper and lower cavity and mold. Core, and then the flow path, gate and cooling water pipe arrangement. We will adhere to the principle of first-class product quality, perfect mold design, advanced production and processing technology, reasonable production price, and excellent ability to deliver on time, to establish a good corporate reputation and serve the new and old customers.
We are a professional molding company, sell different design of mold, Paint Pail Mould is one of them,welcome to visit our website.https://www.rixiangmould.com/
In the development of the automobile industry, the demand for plastic parts is increasing day by day, because the construction of automobiles has a very high application degree of plastic parts, which means that the quality of plastic parts has a huge promotion effect on the development and construction of the automobile field. This requires plastic The production of parts requires quality assurance, and it is the Plastic Pail Mould that determines the quality of the plastic parts.
There are not a few cases where the plastic parts produced caused losses in various fields during the application process due to the things of the mold. Therefore, the production of plastic parts Research on molds for the purpose of improving the quality and efficiency of plastic parts is very helpful to China’s economic development.
We all know that automobiles are very dependent on the application of plastic parts. At the same time, automobile products are constantly updated. Only by grasping the key and difficult points of mold production of plastic parts can mold production meet the development needs of the automotive industry.
Plastic products are definitely a key link in the design of injection molds. For the design of plastic products, the requirement is nothing more than simplifying the plastic product model as much as possible, especially the concave and undulating design should not appear in the design of plastic products.
The requirements for simplicity in the design of plastic products is a general direction, because there are many small links in the design of plastic products, and the simplified design is a requirement for each refinement of plastic products. On the basis of this requirement, each The basic requirements of the link, such as the thickness design of the injection mold, must be as uniform as possible while evolving, so as to avoid inappropriate glue positions with uneven thickness. The rigidity and hardness also need to meet the standards, which is an important part of guaranteeing the quality of plastic parts.
We are a professional molding company, sell different design of mold, Paint Pail Mould is one of them,welcome to visit our website.https://www.rixiangmould.com/
There are not a few cases where the plastic parts produced caused losses in various fields during the application process due to the things of the mold. Therefore, the production of plastic parts Research on molds for the purpose of improving the quality and efficiency of plastic parts is very helpful to China’s economic development.
We all know that automobiles are very dependent on the application of plastic parts. At the same time, automobile products are constantly updated. Only by grasping the key and difficult points of mold production of plastic parts can mold production meet the development needs of the automotive industry.
Plastic products are definitely a key link in the design of injection molds. For the design of plastic products, the requirement is nothing more than simplifying the plastic product model as much as possible, especially the concave and undulating design should not appear in the design of plastic products.
The requirements for simplicity in the design of plastic products is a general direction, because there are many small links in the design of plastic products, and the simplified design is a requirement for each refinement of plastic products. On the basis of this requirement, each The basic requirements of the link, such as the thickness design of the injection mold, must be as uniform as possible while evolving, so as to avoid inappropriate glue positions with uneven thickness. The rigidity and hardness also need to meet the standards, which is an important part of guaranteeing the quality of plastic parts.
We are a professional molding company, sell different design of mold, Paint Pail Mould is one of them,welcome to visit our website.https://www.rixiangmould.com/
Our friends who are struggling in the production line know that there are some operating rules in Plastic Pail Mould. We must know that safety is productivity after all.
The injection molding machine is a kind of complex machine that runs quickly under high temperature and high pressure. The operator is often negligent, causing irreparable physical injury under carelessness, but regrets for life. Plastic medical mould The injection molding machine is dangerous in every step of the operation, especially when the mold is opened and locked. In order to avoid danger, the operator must pay attention to the following safety operation details during injection molding:
The injection molding factory keeps the injection molding machine and its surrounding environment clean and tidy at all times. The space around the injection molding machine is kept as unobstructed as possible. After adding lubricating oil or pressure oil, the leaking oil should be wiped off as soon as possible. Clean up the debris (such as rubber particles) on the melter tube before turning on the electric heater to avoid fire. If it is not necessary to overhaul the machine or when necessary, do not arbitrarily remove the heat shield on the melter tube.
Before injection molding, check whether the clamping can be terminated by pressing the emergency button or opening the safety door during operation.
When the shooting table is moved forward, do not use your hands to remove the deep glue leaking from the nozzle, so as to prevent your hands from being caught between the shooting table and the mold and causing physical damage. When cleaning the barrel, adjust the nozzle temperature to an appropriate higher temperature to keep the nozzle unobstructed, and then use a lower injection pressure and speed to remove the remaining rubber in the barrel. Do not touch it directly with your hands during cleaning. The rubber compound that has just been shot, so as not to be scalded.
Avoid leaving heat-sensitive and corrosive plastics in the barrel for too long, and strictly follow the shutdown and cleaning methods provided by the plastic supplier. When replacing plastics, make sure that the mixing of new and old plastics will not produce chemical reactions (such as POM and PVC mixing and heating will produce poisonous gas), otherwise other plastics must be used to remove the residual material in the barrel.
Do not cancel safety doors or safety switches in order to increase production speed. Before injection molding, check whether the mold is firmly installed on the movable template and head plate of the injection molding machine. Pay attention to whether the ground wire and other wiring of the injection molding machine are properly connected.
When installing the mold, the lifting ring must be completely screwed into the mold lifting hole before lifting. After the mold is installed, the length of the safety rod of the injection molding machine should be adjusted according to the size of the mold, so that when the safety door is opened, the machine safety stop (mechanical lock) can stop the injection molding machine from locking.
During the normal injection molding process, it is strictly forbidden for the operator to take out the injection molded parts from above or below the injection molding machine without opening the safety door. The oil pump motor of the injection molding machine should be turned off in time when inspecting the mold or temporarily not producing.
We are a professional molding company, sell different design of mold, 18L Pail Mould is one of them,welcome to visit our website.https://www.rixiangmould.com/
The injection molding machine is a kind of complex machine that runs quickly under high temperature and high pressure. The operator is often negligent, causing irreparable physical injury under carelessness, but regrets for life. Plastic medical mould The injection molding machine is dangerous in every step of the operation, especially when the mold is opened and locked. In order to avoid danger, the operator must pay attention to the following safety operation details during injection molding:
The injection molding factory keeps the injection molding machine and its surrounding environment clean and tidy at all times. The space around the injection molding machine is kept as unobstructed as possible. After adding lubricating oil or pressure oil, the leaking oil should be wiped off as soon as possible. Clean up the debris (such as rubber particles) on the melter tube before turning on the electric heater to avoid fire. If it is not necessary to overhaul the machine or when necessary, do not arbitrarily remove the heat shield on the melter tube.
Before injection molding, check whether the clamping can be terminated by pressing the emergency button or opening the safety door during operation.
When the shooting table is moved forward, do not use your hands to remove the deep glue leaking from the nozzle, so as to prevent your hands from being caught between the shooting table and the mold and causing physical damage. When cleaning the barrel, adjust the nozzle temperature to an appropriate higher temperature to keep the nozzle unobstructed, and then use a lower injection pressure and speed to remove the remaining rubber in the barrel. Do not touch it directly with your hands during cleaning. The rubber compound that has just been shot, so as not to be scalded.
Avoid leaving heat-sensitive and corrosive plastics in the barrel for too long, and strictly follow the shutdown and cleaning methods provided by the plastic supplier. When replacing plastics, make sure that the mixing of new and old plastics will not produce chemical reactions (such as POM and PVC mixing and heating will produce poisonous gas), otherwise other plastics must be used to remove the residual material in the barrel.
Do not cancel safety doors or safety switches in order to increase production speed. Before injection molding, check whether the mold is firmly installed on the movable template and head plate of the injection molding machine. Pay attention to whether the ground wire and other wiring of the injection molding machine are properly connected.
When installing the mold, the lifting ring must be completely screwed into the mold lifting hole before lifting. After the mold is installed, the length of the safety rod of the injection molding machine should be adjusted according to the size of the mold, so that when the safety door is opened, the machine safety stop (mechanical lock) can stop the injection molding machine from locking.
During the normal injection molding process, it is strictly forbidden for the operator to take out the injection molded parts from above or below the injection molding machine without opening the safety door. The oil pump motor of the injection molding machine should be turned off in time when inspecting the mold or temporarily not producing.
We are a professional molding company, sell different design of mold, 18L Pail Mould is one of them,welcome to visit our website.https://www.rixiangmould.com/
Have you ever considered to make plastic tissue boxes in transparent material?
Such as PET, PC, PS, Acrylic. They are transparent material, and the tissue boxes will be very upscale. But as these materials are hard plastic, so they have a high requirement for Bucket Mould Manufacturer steels.
And due to the cost for PC, PS and Acrylic are high, while PET cost is much lower, in this case, PET material are popular in recent years, and PET tissue boxes are popular, so as PET tissue box mould.
For PET products, as this material is hard and transparent, it needs high hardness mould steel which could have a very good mirror polishment.
We suggest to choose H13, S136, NAK80 for PET tissue box mould, with these steels, the hardness could be HRC48-52, and mould guarantee life could be at least 1,000 K shots.
Some customers may think their production quantity will be not so large, and they change PET tissue box design often. In this case, could also choose 718H steel to save your PET tissue box mould investment. We will make chrome plating or nitriding for mould cavity and core to increase the surface hardness.
We are an experienced plastic injection mould maker in China, we could offer you plastic product design, PET tissue box mould design and mould manufacturing, plastic injection molding machine and auxiliary machines. We offer you one-stop services and turn-key solutions for your new production line. If you don’t have plastic injection molding machines, we also could offer you mass production services.
Welcome to contact us for your new projects.
We are a professional molding company, sell different design of mold, Paint Pail Mould is one of them,welcome to visit our website.https://www.rixiangmould.com/
Such as PET, PC, PS, Acrylic. They are transparent material, and the tissue boxes will be very upscale. But as these materials are hard plastic, so they have a high requirement for Bucket Mould Manufacturer steels.
And due to the cost for PC, PS and Acrylic are high, while PET cost is much lower, in this case, PET material are popular in recent years, and PET tissue boxes are popular, so as PET tissue box mould.
For PET products, as this material is hard and transparent, it needs high hardness mould steel which could have a very good mirror polishment.
We suggest to choose H13, S136, NAK80 for PET tissue box mould, with these steels, the hardness could be HRC48-52, and mould guarantee life could be at least 1,000 K shots.
Some customers may think their production quantity will be not so large, and they change PET tissue box design often. In this case, could also choose 718H steel to save your PET tissue box mould investment. We will make chrome plating or nitriding for mould cavity and core to increase the surface hardness.
We are an experienced plastic injection mould maker in China, we could offer you plastic product design, PET tissue box mould design and mould manufacturing, plastic injection molding machine and auxiliary machines. We offer you one-stop services and turn-key solutions for your new production line. If you don’t have plastic injection molding machines, we also could offer you mass production services.
Welcome to contact us for your new projects.
We are a professional molding company, sell different design of mold, Paint Pail Mould is one of them,welcome to visit our website.https://www.rixiangmould.com/
The Period From The Bucket Mould
2021年7月1日 Thermoplastics are characterized by expansion after heating and contraction after cooling. Of course, the volume will shrink after pressurization. In the injection molding process, the molten plastic is first injected into the mold cavity. After the filling is completed, the molten material cools and solidifies. When the plastic part is taken out of the Bucket Mould Manufacturer, shrinkage occurs. This shrinkage is called forming shrinkage. During the period from when the mold is taken out to stabilize the plastic part, there will still be slight changes in size. One change is to continue to shrink. This shrinkage is called post-shrinkage.
Another change is that some hygroscopic plastics swell due to moisture absorption. For example, when the water content of nylon 610 is 3%, the size increase is 2%; when the water content of glass fiber reinforced nylon 66 is 40%, the size increase is 0.3%. But the main role is forming shrinkage.
At present, the method of determining the shrinkage rate of various plastics (forming shrinkage + post shrinkage) generally recommends the provisions of DIN16901 in the German national standard. That is, the difference between the size of the mold cavity at 23°C±0.1°C and the size of the corresponding plastic part measured at a temperature of 23°C and a relative humidity of 50±5% after being placed for 24 hours after forming is calculated.
The shrinkage rate S is expressed by the following formula: S={(D-M)/D}×100%(1)
Among them: S-shrinkage rate; D-mold size; M-plastic part size.
If the mold cavity is calculated according to the known plastic part size and material shrinkage rate, it is D=M/(1-S). In order to simplify the calculation in the mold design, the following formula is generally used to find the mold size:
D=M+MS(2)
If a more accurate calculation is required, the following formula shall be applied: D=M+MS+MS2(3)
However, when determining the shrinkage rate, because the actual shrinkage rate is affected by many factors, only approximate values can be used. Therefore, the calculation of the cavity size by formula (2) basically meets the requirements. When manufacturing the mold, the cavity is processed according to the lower deviation, and the core is processed according to the upper deviation, so that it can be properly trimmed if necessary.
The main reason why it is difficult to accurately determine the shrinkage rate is firstly because the shrinkage rate of various plastics is not a fixed value, but a range. Because the shrinkage rate of the same material produced in different factories is not the same, even the shrinkage rate of the same material with different batch numbers produced in one factory is different.
Therefore, each factory can only provide users with the shrinkage rate range of the plastic produced by the factory. Secondly, the actual shrinkage during the forming process is also affected by factors such as the shape of the plastic part, mold structure and forming conditions.
Plastic part shape
For the wall thickness of the formed part, the cooling time of the thick wall is generally longer, so the shrinkage rate is also larger. For general plastic parts, when the size of the melt flow direction L is different from the size perpendicular to the melt flow direction W, the difference in shrinkage is also greater. From the point of view of the melt flow distance, the pressure loss of the part far from the gate is large, so the shrinkage rate at this point is also larger than that of the nearest gate. Because shapes such as ribs, holes, bosses, and carvings have shrinkage resistance, the shrinkage rate of these parts is small.
Mould structure
The gate type also has an effect on the shrinkage rate. When using a small gate, the shrinkage rate of the plastic part increases because the gate solidifies before the end of the holding pressure. The cooling circuit structure in the injection mold is also a key in the mold design. Inappropriate design of the cooling circuit will result in poor shrinkage due to the uneven temperature throughout the plastic parts, which will result in out of tolerance or deformation of the plastic parts. In the thin-walled part, the influence of mold temperature distribution on shrinkage is more obvious.
Mold size and manufacturing tolerances
In addition to calculating the basic dimensions of the mold cavity and core through the formula D=M(1+S), there is also a problem of machining tolerances. By convention, the machining tolerance of the mold is 1/3 of the tolerance of the plastic part. However, due to differences in plastic shrinkage range and stability, first of all, the dimensional tolerances of plastic parts formed by different plastics must be rationally determined. That is to say, the dimensional tolerance of plastic molded plastic parts should be larger due to the larger shrinkage rate range or the poorer shrinkage rate stability. Otherwise, a large number of waste products with out-of-poor dimensions may occur.
For this reason, various countries have specially formulated national standards or industry standards for the dimensional tolerances of plastic parts. China has also established ministerial professional standards. But most of them have no corresponding dimensional tolerances of the mold cavity. The German national standard has specially formulated the DIN16901 standard for plastic part dimensional tolerances and the corresponding DIN16749 standard for mold cavity dimensional tolerances. This standard has a greater impact in the world, so it can be used as a reference for the plastic mold industry.
About the dimensional tolerance and allowable deviation of plastic parts
In order to reasonably determine the dimensional tolerances of plastic parts formed by materials with different shrinkage characteristics, let the standard introduce the concept of forming shrinkage difference △VS.
△VS=VSR_VST(4)
Where: VS-forming shrinkage difference VSR-forming shrinkage rate in the direction of melt flow VST-forming shrinkage rate in the direction perpendicular to the melt flow.
According to the plastic △VS value, the shrinkage characteristics of various plastics are divided into 4 groups. The group with the smallest △VS value is the high-precision group, and so on, the group with the largest △VS value is the low-precision group. And according to the basic dimensions, the precision technology, 110, 120, 130, 140, 150 and 160 tolerance groups have been compiled. It is also stipulated that the dimensional tolerances of plastic parts with the most stable shrinkage characteristics can be selected from 110, 120 and 130 groups.
The dimensional tolerances of plastic molded parts with moderately stable shrinkage characteristics are 120, 130, and 140. If 110 groups of dimensional tolerances are used to form plastic parts with this type of plastic, a large number of out-of-size plastic parts may be produced. The dimensional tolerances of plastic parts with poor shrinkage characteristics are selected from groups 130, 140 and 150.
The dimensional tolerances of plastic parts with the worst shrinkage characteristics are selected from groups of 140, 150 and 160. When using this tolerance table, you need to pay attention to the following points. The general tolerances in the table are used for dimensional tolerances that do not indicate tolerances.
The tolerance for marking the deviation directly is the tolerance zone used for marking the tolerance of the plastic part. The upper and lower deviations can be determined by the designer. For example, if the tolerance zone is 0.8mm, the following upper and lower deviations can be selected. 0.0; -0.8; ±0.4; -0.2; -0.5 and so on. Each tolerance group has two sets of tolerance values A and B. Among them, A is the size formed by the combination of mold parts, which increases the error caused by the misalignment of the mold parts.
This increase is 0.2mm. Where B is the size directly determined by the mold parts. Precision technology is a set of tolerance values specially set up for plastic parts with high precision requirements. Before using the tolerances of plastic parts, we must first know which tolerance groups are suitable for the plastic used.
We are a professional molding company, sell different design of mold, Pail Mould Wholesale is one of them,welcome to visit our website.https://www.rixiangmould.com/
Another change is that some hygroscopic plastics swell due to moisture absorption. For example, when the water content of nylon 610 is 3%, the size increase is 2%; when the water content of glass fiber reinforced nylon 66 is 40%, the size increase is 0.3%. But the main role is forming shrinkage.
At present, the method of determining the shrinkage rate of various plastics (forming shrinkage + post shrinkage) generally recommends the provisions of DIN16901 in the German national standard. That is, the difference between the size of the mold cavity at 23°C±0.1°C and the size of the corresponding plastic part measured at a temperature of 23°C and a relative humidity of 50±5% after being placed for 24 hours after forming is calculated.
The shrinkage rate S is expressed by the following formula: S={(D-M)/D}×100%(1)
Among them: S-shrinkage rate; D-mold size; M-plastic part size.
If the mold cavity is calculated according to the known plastic part size and material shrinkage rate, it is D=M/(1-S). In order to simplify the calculation in the mold design, the following formula is generally used to find the mold size:
D=M+MS(2)
If a more accurate calculation is required, the following formula shall be applied: D=M+MS+MS2(3)
However, when determining the shrinkage rate, because the actual shrinkage rate is affected by many factors, only approximate values can be used. Therefore, the calculation of the cavity size by formula (2) basically meets the requirements. When manufacturing the mold, the cavity is processed according to the lower deviation, and the core is processed according to the upper deviation, so that it can be properly trimmed if necessary.
The main reason why it is difficult to accurately determine the shrinkage rate is firstly because the shrinkage rate of various plastics is not a fixed value, but a range. Because the shrinkage rate of the same material produced in different factories is not the same, even the shrinkage rate of the same material with different batch numbers produced in one factory is different.
Therefore, each factory can only provide users with the shrinkage rate range of the plastic produced by the factory. Secondly, the actual shrinkage during the forming process is also affected by factors such as the shape of the plastic part, mold structure and forming conditions.
Plastic part shape
For the wall thickness of the formed part, the cooling time of the thick wall is generally longer, so the shrinkage rate is also larger. For general plastic parts, when the size of the melt flow direction L is different from the size perpendicular to the melt flow direction W, the difference in shrinkage is also greater. From the point of view of the melt flow distance, the pressure loss of the part far from the gate is large, so the shrinkage rate at this point is also larger than that of the nearest gate. Because shapes such as ribs, holes, bosses, and carvings have shrinkage resistance, the shrinkage rate of these parts is small.
Mould structure
The gate type also has an effect on the shrinkage rate. When using a small gate, the shrinkage rate of the plastic part increases because the gate solidifies before the end of the holding pressure. The cooling circuit structure in the injection mold is also a key in the mold design. Inappropriate design of the cooling circuit will result in poor shrinkage due to the uneven temperature throughout the plastic parts, which will result in out of tolerance or deformation of the plastic parts. In the thin-walled part, the influence of mold temperature distribution on shrinkage is more obvious.
Mold size and manufacturing tolerances
In addition to calculating the basic dimensions of the mold cavity and core through the formula D=M(1+S), there is also a problem of machining tolerances. By convention, the machining tolerance of the mold is 1/3 of the tolerance of the plastic part. However, due to differences in plastic shrinkage range and stability, first of all, the dimensional tolerances of plastic parts formed by different plastics must be rationally determined. That is to say, the dimensional tolerance of plastic molded plastic parts should be larger due to the larger shrinkage rate range or the poorer shrinkage rate stability. Otherwise, a large number of waste products with out-of-poor dimensions may occur.
For this reason, various countries have specially formulated national standards or industry standards for the dimensional tolerances of plastic parts. China has also established ministerial professional standards. But most of them have no corresponding dimensional tolerances of the mold cavity. The German national standard has specially formulated the DIN16901 standard for plastic part dimensional tolerances and the corresponding DIN16749 standard for mold cavity dimensional tolerances. This standard has a greater impact in the world, so it can be used as a reference for the plastic mold industry.
About the dimensional tolerance and allowable deviation of plastic parts
In order to reasonably determine the dimensional tolerances of plastic parts formed by materials with different shrinkage characteristics, let the standard introduce the concept of forming shrinkage difference △VS.
△VS=VSR_VST(4)
Where: VS-forming shrinkage difference VSR-forming shrinkage rate in the direction of melt flow VST-forming shrinkage rate in the direction perpendicular to the melt flow.
According to the plastic △VS value, the shrinkage characteristics of various plastics are divided into 4 groups. The group with the smallest △VS value is the high-precision group, and so on, the group with the largest △VS value is the low-precision group. And according to the basic dimensions, the precision technology, 110, 120, 130, 140, 150 and 160 tolerance groups have been compiled. It is also stipulated that the dimensional tolerances of plastic parts with the most stable shrinkage characteristics can be selected from 110, 120 and 130 groups.
The dimensional tolerances of plastic molded parts with moderately stable shrinkage characteristics are 120, 130, and 140. If 110 groups of dimensional tolerances are used to form plastic parts with this type of plastic, a large number of out-of-size plastic parts may be produced. The dimensional tolerances of plastic parts with poor shrinkage characteristics are selected from groups 130, 140 and 150.
The dimensional tolerances of plastic parts with the worst shrinkage characteristics are selected from groups of 140, 150 and 160. When using this tolerance table, you need to pay attention to the following points. The general tolerances in the table are used for dimensional tolerances that do not indicate tolerances.
The tolerance for marking the deviation directly is the tolerance zone used for marking the tolerance of the plastic part. The upper and lower deviations can be determined by the designer. For example, if the tolerance zone is 0.8mm, the following upper and lower deviations can be selected. 0.0; -0.8; ±0.4; -0.2; -0.5 and so on. Each tolerance group has two sets of tolerance values A and B. Among them, A is the size formed by the combination of mold parts, which increases the error caused by the misalignment of the mold parts.
This increase is 0.2mm. Where B is the size directly determined by the mold parts. Precision technology is a set of tolerance values specially set up for plastic parts with high precision requirements. Before using the tolerances of plastic parts, we must first know which tolerance groups are suitable for the plastic used.
We are a professional molding company, sell different design of mold, Pail Mould Wholesale is one of them,welcome to visit our website.https://www.rixiangmould.com/
For Bucket Mould Manufacturer, it is very important to master the temperature. This is because temperature has a significant effect on the function of plastic extrusion and parison. Advancing the temperature of the extruder can reduce the viscosity of the melt, the fluidity of the melt, reduce the power consumption, and the speed of the advancing screw without affecting the plastic barrel. The mixing and plasticizing effect. In order to achieve this goal, we can use an electronic temperature controller to stabilize the process temperature and save energy significantly.
Humidity will affect the monotonous speed of Plastic medical mould manufacturers, which must be better understood. Therefore, the relative humidity of plastic barrels is also an important factor affecting product quality. When the relative humidity in the barrel is low, the water vapor pressure difference between the surface and the monotonic machine is large, and the monotonic speed is fast, and vice versa.
See whether the product manufacturer has a relevant production license, such as a dangerous goods packaging product license. Check the raw materials used in the production of plastic barrels. It is better to use new materials; carefully check and understand whether the mechanical strength, heat resistance, solvent resistance and other functional indicators of the plastic barrel meet the requirements of the relevant specifications. Pay attention to check the appearance quality of the product, including color, integrity, gloss, etc. You can knock on the plastic barrel to listen to the sound, and you can wire it to see the elongation of the product.
If you use plastic buckets to hold drinking water, the release of toxic substances will endanger your health. Look at the color of the barrel. The color is required to be bright and without color difference. Choose a transparent color, followed by a single beautiful color. Don’t choose black, because black is easy to add secondary materials and recycled materials, but it is difficult to distinguish. Look at the appearance of the barrel. Touch the edges with your hands, without any noticeable draping, with chamfers at all corners, and no scratching of your hands. Check that the rubber surface has no impurities, no black spots, the appearance of the bucket is transparent and lubricating, and the finish is good.
The impact on the expansion rate of plastic drums does not necessarily depend on the plastic structure. For example, thick-walled plastic parts have a larger expansion rate than thin-walled plastic parts (but most of the 1mm thin-walled plastic parts have a larger expansion rate than 2mm, which is due to the increased resistance of the melt in the mold cavity).
We are a professional molding company, sell different design of mold, Paint Pail Mould is one of them,welcome to visit our website.https://www.rixiangmould.com/
Humidity will affect the monotonous speed of Plastic medical mould manufacturers, which must be better understood. Therefore, the relative humidity of plastic barrels is also an important factor affecting product quality. When the relative humidity in the barrel is low, the water vapor pressure difference between the surface and the monotonic machine is large, and the monotonic speed is fast, and vice versa.
See whether the product manufacturer has a relevant production license, such as a dangerous goods packaging product license. Check the raw materials used in the production of plastic barrels. It is better to use new materials; carefully check and understand whether the mechanical strength, heat resistance, solvent resistance and other functional indicators of the plastic barrel meet the requirements of the relevant specifications. Pay attention to check the appearance quality of the product, including color, integrity, gloss, etc. You can knock on the plastic barrel to listen to the sound, and you can wire it to see the elongation of the product.
If you use plastic buckets to hold drinking water, the release of toxic substances will endanger your health. Look at the color of the barrel. The color is required to be bright and without color difference. Choose a transparent color, followed by a single beautiful color. Don’t choose black, because black is easy to add secondary materials and recycled materials, but it is difficult to distinguish. Look at the appearance of the barrel. Touch the edges with your hands, without any noticeable draping, with chamfers at all corners, and no scratching of your hands. Check that the rubber surface has no impurities, no black spots, the appearance of the bucket is transparent and lubricating, and the finish is good.
The impact on the expansion rate of plastic drums does not necessarily depend on the plastic structure. For example, thick-walled plastic parts have a larger expansion rate than thin-walled plastic parts (but most of the 1mm thin-walled plastic parts have a larger expansion rate than 2mm, which is due to the increased resistance of the melt in the mold cavity).
We are a professional molding company, sell different design of mold, Paint Pail Mould is one of them,welcome to visit our website.https://www.rixiangmould.com/
Structure Design Of Bucket Mould
2021年6月3日 The Bucket Mould building is very complicated. So many details need to work together. From design, machining, assembling, test and fix then finally go into the service. A lot of factors will affect the quality and performance of mold. We need to truly understand it to make the mold building get better.
Steel Type and Quality
The steel type and quality is the most important thing for mold. It is the beginning and base for everything. So choose the right steel material is very important. There are many types for mold steel. Such as the D3, A2, O2, D2 tool steel of cold rolled steel; H11, 1.2344,H13 tool steel of hot rolled steel and more. And maybe you need to focus on the points below to choose the right one.
The demand for material for injection molding is that different plastic needs to pair up with different steel materials. And it also has the demand for corrosion resistance and polishing.
If the steel function is enough, then it is the best. Pay a lot of money to get much high steel performance is not necessary.
Surface treatment also is very important. Nitrogen treatment can make the steel surface hardness get higher and make its surface life get longer. And electroplating can change the performance of mold steel. Some plastic need high luminance and corrosion-resistant, then we can use electroplating to raise and change the performance of steel.
Structure Design
Good structure design not just consider the product material property: shrinkage ratio, the temperature of forming and more. But also need to think of the water part of the cooling. Great structure design can enhance the mold work time and maintain it can successfully produce products. That is huge for raising efficiency and cut down the cost.
Mold Craftmanship
We all need good mold craftmanship to make it great. Great craftmanship can cut down the cost and working time efficaciously. If there are mistakes, it will cause the mold to become soldering. By the way, worse processing will influence the function of mold, decrease the life of mold, even it will get hurt and breakage in the processing of injection molding.
Polishing
The polishing is the final part of mold production. Polishing also helps and complement the mold action, especially for mold release. Lots of the production of some molds are not smooth because the lighting is not in place, the resistance is too large, the demolding is difficult, and even the top is white and the top is cracked.
Mold Assembly
The mold is just like assembling a machine. Every part and every screw must not go wrong, otherwise the consequences will be quite serious. May cause product defects, affect production, and even completely damage the mold, resulting in scrap. So the assembly work must be very detailed. During the assembly process, pay special attention to the cleaning of the mold, especially the water channels and screw holes. Be sure to blow off the iron filings inside.
Mold Cooling
Anyone with years of mold experience knows how important cooling is to mold. Due to the increase in prices and human wages, when producing products in large quantities, the profit brought by reducing the injection cycle by one second is unimaginable. However, when the production cycle is accelerated, the temperature of the mold will rise. If it is not effectively controlled, it will cause the mold to be too hot to form, and even cause the mold to deform and fail. Therefore, good cooling system design is particularly important, including the density, diameter, and interconnection of water channels.
Mold Maintenance
Mold maintenance is mainly maintenance and maintenance during production. Molds are like cars. If it is not used for a long time without maintenance, it may be scrapped and die. Therefore, after each use of the mold, comprehensive maintenance is required, especially the rust prevention of the molding part, and the rust prevention of the main moving parts. Because the mold needs to receive water during the production process, the mold may be filled with water during the installation or disassembly process, so it is necessary to ensure that the mold is dry before applying a layer of oil to protect it.
These details we need to focus on it and do it in the right way to make sure to produce a good mold to create a good product line.
We are a professional molding company, sell different design of mold, Pail Mould Wholesale is one of them,welcome to visit our website.https://www.rixiangmould.com/
Steel Type and Quality
The steel type and quality is the most important thing for mold. It is the beginning and base for everything. So choose the right steel material is very important. There are many types for mold steel. Such as the D3, A2, O2, D2 tool steel of cold rolled steel; H11, 1.2344,H13 tool steel of hot rolled steel and more. And maybe you need to focus on the points below to choose the right one.
The demand for material for injection molding is that different plastic needs to pair up with different steel materials. And it also has the demand for corrosion resistance and polishing.
If the steel function is enough, then it is the best. Pay a lot of money to get much high steel performance is not necessary.
Surface treatment also is very important. Nitrogen treatment can make the steel surface hardness get higher and make its surface life get longer. And electroplating can change the performance of mold steel. Some plastic need high luminance and corrosion-resistant, then we can use electroplating to raise and change the performance of steel.
Structure Design
Good structure design not just consider the product material property: shrinkage ratio, the temperature of forming and more. But also need to think of the water part of the cooling. Great structure design can enhance the mold work time and maintain it can successfully produce products. That is huge for raising efficiency and cut down the cost.
Mold Craftmanship
We all need good mold craftmanship to make it great. Great craftmanship can cut down the cost and working time efficaciously. If there are mistakes, it will cause the mold to become soldering. By the way, worse processing will influence the function of mold, decrease the life of mold, even it will get hurt and breakage in the processing of injection molding.
Polishing
The polishing is the final part of mold production. Polishing also helps and complement the mold action, especially for mold release. Lots of the production of some molds are not smooth because the lighting is not in place, the resistance is too large, the demolding is difficult, and even the top is white and the top is cracked.
Mold Assembly
The mold is just like assembling a machine. Every part and every screw must not go wrong, otherwise the consequences will be quite serious. May cause product defects, affect production, and even completely damage the mold, resulting in scrap. So the assembly work must be very detailed. During the assembly process, pay special attention to the cleaning of the mold, especially the water channels and screw holes. Be sure to blow off the iron filings inside.
Mold Cooling
Anyone with years of mold experience knows how important cooling is to mold. Due to the increase in prices and human wages, when producing products in large quantities, the profit brought by reducing the injection cycle by one second is unimaginable. However, when the production cycle is accelerated, the temperature of the mold will rise. If it is not effectively controlled, it will cause the mold to be too hot to form, and even cause the mold to deform and fail. Therefore, good cooling system design is particularly important, including the density, diameter, and interconnection of water channels.
Mold Maintenance
Mold maintenance is mainly maintenance and maintenance during production. Molds are like cars. If it is not used for a long time without maintenance, it may be scrapped and die. Therefore, after each use of the mold, comprehensive maintenance is required, especially the rust prevention of the molding part, and the rust prevention of the main moving parts. Because the mold needs to receive water during the production process, the mold may be filled with water during the installation or disassembly process, so it is necessary to ensure that the mold is dry before applying a layer of oil to protect it.
These details we need to focus on it and do it in the right way to make sure to produce a good mold to create a good product line.
We are a professional molding company, sell different design of mold, Pail Mould Wholesale is one of them,welcome to visit our website.https://www.rixiangmould.com/
Polypropylene is one of common plastic resin which used for home appliance and medical plastic parts. It can be used for cup, washbasin, garbage can, basket and toys etc.. It can be also used for disposable medical vessel and box etc, sure you should use medical grade polypropelene. It is cheaper than ABS, PC, PC/ABS and nylon etc. resin. Also it is softer than them. Polypropylene abbreviation is PP. PP with super folding resistance, so it can be used for lots of folding box such as stationery and glass box etc. PP is not possible to do the painting process, but it is okay to do the printing.
PP raw material is semi-transparent. Also you can pigment to have various semi-transparent color for PP injection molded parts.
To help you to save cost for PP Plastic Pail Mould injection molding, below we will talk about how to save cost on the prototype, mold making and injection molding.
Prototype making for Polypropylene
On the PP prototye making, generally it is not possible to carry out the folding performance. There is CNC machining, RTV casting and SLA printing to make PP prototype. You can also choose ABS resin to make the PP prototype.
Save your cost on Polypropylene injection mold
What is injection mold?
Injection mold is a tooling to form the Polypropelene or the other resin plastic product.
Choose right steel for Polypropylene injection mold
As you know PP is not so hard, generally it will use cheap steel such as P20, 2311 or 2312 to make the mold. If the injection mold core and cavity is lower than HRC 44, we call it prehard steel. For PP injection mold, we can use prehard mold. But for high volume injection mold, for example if the mold life is more 1000000shots, you need to consider through hard mold, it means you can choose H13 or 2344 for core and cavity.
If you do not know the quantities you are going to make based on your marketing, you can use prehard mold first. If you purchase Polypropylene injection molding in China, you can always use prehard mold as mold maker will assure the mold life, anyhow you need to confirm with your mold manufacturer.
Define mold cavity for your injection mold manufacturer
If mold maker ask you how many cavity you need for your mold. It is like to ask you how many same parts you are going to put into your injection mold. This affect the production capacity. Generally the injection molding just take a few seconds to make one shot(cavity). In case you are not professional, you can let mold maker know how many piece you are going to order each time, then you plastic mold manufacturer will carry out the mold layout.
Also there is family mold, it is to have different plastic parts in to cavity. If you do so, you need to let your mold factory know if you have different color for each parts, also the useage of each part into the cavity for your final assembly products.
Tips on Polypropylene injection molding
You should choose the right PP injection molding machine. Generally the high speed injection molding machine is more suitable to inject polypropylene. This is thanks to PP resin with high flow performance. This also need mold manufacturer to choose right mold manufacturing process and have reliable design for PP injection mold, otherwise it is easy to have flash. Please kindly noted the common standard injection machine is also suitable for PP injection molding, the difference is on quality and product capacity.
Tips to purchase Polypropylene injection molding in China.
There are many injection molding factory in China. Some of them is mold manufacture, some of them is injection molding manufacture, also there is trading company. All of them can receive your orders. But if you face mold manufacture, you will have higher mold cost, you need to let them know your injection mold is to leave in the mold factory for production but not to have mold to import to your Country. If it is injection molding manufacturer, generally you can get reasonable mold cost. But on the different location of China and even if it is different people to quote, there is difference on the mold price and unit price.
To have affordable price, you need to let injection molding manufacturer know below specification for PP plastic molding.
How many quantities you need to order each time?
Color for each of your parts
QTY for each part to assemble one your final product. If you have many parts to inquiry in one time, you have BILL OF MATERIAL form.
You need injection mold or you need to do the production in your molding manufacturers’ plant.
Once you have same specificaiton for your mold maker, then they use same specification for quotation, then it is easier to carry out which one with competition.
We are a professional molding company, sell different design of mold, 20L Pail Mould is one of them,welcome to visit our website.https://www.zjclassic.com/
PP raw material is semi-transparent. Also you can pigment to have various semi-transparent color for PP injection molded parts.
To help you to save cost for PP Plastic Pail Mould injection molding, below we will talk about how to save cost on the prototype, mold making and injection molding.
Prototype making for Polypropylene
On the PP prototye making, generally it is not possible to carry out the folding performance. There is CNC machining, RTV casting and SLA printing to make PP prototype. You can also choose ABS resin to make the PP prototype.
Save your cost on Polypropylene injection mold
What is injection mold?
Injection mold is a tooling to form the Polypropelene or the other resin plastic product.
Choose right steel for Polypropylene injection mold
As you know PP is not so hard, generally it will use cheap steel such as P20, 2311 or 2312 to make the mold. If the injection mold core and cavity is lower than HRC 44, we call it prehard steel. For PP injection mold, we can use prehard mold. But for high volume injection mold, for example if the mold life is more 1000000shots, you need to consider through hard mold, it means you can choose H13 or 2344 for core and cavity.
If you do not know the quantities you are going to make based on your marketing, you can use prehard mold first. If you purchase Polypropylene injection molding in China, you can always use prehard mold as mold maker will assure the mold life, anyhow you need to confirm with your mold manufacturer.
Define mold cavity for your injection mold manufacturer
If mold maker ask you how many cavity you need for your mold. It is like to ask you how many same parts you are going to put into your injection mold. This affect the production capacity. Generally the injection molding just take a few seconds to make one shot(cavity). In case you are not professional, you can let mold maker know how many piece you are going to order each time, then you plastic mold manufacturer will carry out the mold layout.
Also there is family mold, it is to have different plastic parts in to cavity. If you do so, you need to let your mold factory know if you have different color for each parts, also the useage of each part into the cavity for your final assembly products.
Tips on Polypropylene injection molding
You should choose the right PP injection molding machine. Generally the high speed injection molding machine is more suitable to inject polypropylene. This is thanks to PP resin with high flow performance. This also need mold manufacturer to choose right mold manufacturing process and have reliable design for PP injection mold, otherwise it is easy to have flash. Please kindly noted the common standard injection machine is also suitable for PP injection molding, the difference is on quality and product capacity.
Tips to purchase Polypropylene injection molding in China.
There are many injection molding factory in China. Some of them is mold manufacture, some of them is injection molding manufacture, also there is trading company. All of them can receive your orders. But if you face mold manufacture, you will have higher mold cost, you need to let them know your injection mold is to leave in the mold factory for production but not to have mold to import to your Country. If it is injection molding manufacturer, generally you can get reasonable mold cost. But on the different location of China and even if it is different people to quote, there is difference on the mold price and unit price.
To have affordable price, you need to let injection molding manufacturer know below specification for PP plastic molding.
How many quantities you need to order each time?
Color for each of your parts
QTY for each part to assemble one your final product. If you have many parts to inquiry in one time, you have BILL OF MATERIAL form.
You need injection mold or you need to do the production in your molding manufacturers’ plant.
Once you have same specificaiton for your mold maker, then they use same specification for quotation, then it is easier to carry out which one with competition.
We are a professional molding company, sell different design of mold, 20L Pail Mould is one of them,welcome to visit our website.https://www.zjclassic.com/
There are basics of good injection Plastic Pail Mould for plastic washing machine parts based on its 20+ years of experience on home appliance injection moulds. Here talked about the aspect which cannot be ignored: part molding analysis.
In order to ensure that ideal plastic products are manufactured, it is necessary to understand the purpose, use condition, appearance requirements, etc. of the parts. In addition to the reasonable selection of plastic, the molding process of plastic parts must be considered. Molding analysis of plastic parts is directly related to mold design. Only when the design of plastic parts can meet the requirements of the molding process can a reasonable mold structure be designed. Which is not only ensuring the smooth plastic parts molding, but also improving productivity and reducing costs.
Part Molding Analysis
For plastic washing machine parts, there are major four tips shall be considered at first.
1. Draft Angle
To easy remove plastic parts from mould cavity or core, the reasonable draft anglemust be considered for the inner and outer walls of them.
2. Part Holes
Generally, to increase the production efficiency, the holes on the parts should be molded at one time. Otherwise, the easy further process shall be designed well.
3. Part Thickness
It is vital to determine the wall thickness of the parts reasonably. The wall thickness of the parts should be as uniform as possible and avoid being too thin, otherwise the plastic parts will deform due to uneven shrinkage with other defects.
4. Part Strength
Solid parts ensure the final washing machine durable ability, hence, the structure design for part strength such as ribs and round corner shall be paid attention to as well.
We are a professional molding company, sell different design of mold, 18L Bucket Mould is one of them,welcome to visit our website.https://www.zjclassic.com/
In order to ensure that ideal plastic products are manufactured, it is necessary to understand the purpose, use condition, appearance requirements, etc. of the parts. In addition to the reasonable selection of plastic, the molding process of plastic parts must be considered. Molding analysis of plastic parts is directly related to mold design. Only when the design of plastic parts can meet the requirements of the molding process can a reasonable mold structure be designed. Which is not only ensuring the smooth plastic parts molding, but also improving productivity and reducing costs.
Part Molding Analysis
For plastic washing machine parts, there are major four tips shall be considered at first.
1. Draft Angle
To easy remove plastic parts from mould cavity or core, the reasonable draft anglemust be considered for the inner and outer walls of them.
2. Part Holes
Generally, to increase the production efficiency, the holes on the parts should be molded at one time. Otherwise, the easy further process shall be designed well.
3. Part Thickness
It is vital to determine the wall thickness of the parts reasonably. The wall thickness of the parts should be as uniform as possible and avoid being too thin, otherwise the plastic parts will deform due to uneven shrinkage with other defects.
4. Part Strength
Solid parts ensure the final washing machine durable ability, hence, the structure design for part strength such as ribs and round corner shall be paid attention to as well.
We are a professional molding company, sell different design of mold, 18L Bucket Mould is one of them,welcome to visit our website.https://www.zjclassic.com/
Plastic Pail Mould Process Of Use
2021年4月15日 Diversified sealed Plastic Pail Mould can realize multi-category selection and clarification. Therefore, we will follow our selection characteristics and purchase suitable products. The plastic bucket is made of brand new materials. No illegal materials are added during the procurement and processing process, which is suitable for food processing. Chemical smoothness ensures cargo transportation and doubles the loading and unloading of chemicals. The barrel is beautiful: high-tech strictly controls the appearance change, which suits our beauty. Plastic buckets can be conveniently packed and cleaned for food. Its reasonable manufacturing and professional brand are still used in the handling, distribution, placement and smooth manufacturing process acquired by the factory. Plastic drums are used for packaging and loading Bucket mould many selected goods. They can be manufactured in accordance with the manufacturer’s instructions.
In the process of use, plastic barrels sometimes become brittle. Fragile plastic buckets will only be damaged, which is not conducive to long-term use. The brittleness of plastic barrels is closely related to the selection of production molds, raw materials, production machinery and production processes. Plastic barrel manufacturers introduced how to avoid the embrittlement of plastic barrels from the production process.
1. The temperature of the cylinder and nozzle is too low and needs to be adjusted. If the material is simply degraded, the temperature of the cylinder and nozzle should be increased.
2. Reduce the back pressure and rotation speed of the screw preform to loosen the material and reduce the deterioration of the plastic due to shearing overheating.
3. The mold temperature is too high and it is difficult to demold. The mold temperature is low, the plastic is cooled prematurely, and the fusion joint is poorly fused and easy to crack. It is especially suitable for high melting point plastics such as polycarbonate.
4. The plastic barrel core should have an appropriate demoulding angle. When the core is difficult to demold, the temperature of the cavity should be increased and the cooling time should be shortened. When the cavity is difficult to separate, the temperature of the cavity should be lowered and the cooling time should be prolonged.
We are a professional molding company, sell different design of mold, 20L Pail Mould is one of them,welcome to visit our website.https://www.rixiangmould.com/
In the process of use, plastic barrels sometimes become brittle. Fragile plastic buckets will only be damaged, which is not conducive to long-term use. The brittleness of plastic barrels is closely related to the selection of production molds, raw materials, production machinery and production processes. Plastic barrel manufacturers introduced how to avoid the embrittlement of plastic barrels from the production process.
1. The temperature of the cylinder and nozzle is too low and needs to be adjusted. If the material is simply degraded, the temperature of the cylinder and nozzle should be increased.
2. Reduce the back pressure and rotation speed of the screw preform to loosen the material and reduce the deterioration of the plastic due to shearing overheating.
3. The mold temperature is too high and it is difficult to demold. The mold temperature is low, the plastic is cooled prematurely, and the fusion joint is poorly fused and easy to crack. It is especially suitable for high melting point plastics such as polycarbonate.
4. The plastic barrel core should have an appropriate demoulding angle. When the core is difficult to demold, the temperature of the cavity should be increased and the cooling time should be shortened. When the cavity is difficult to separate, the temperature of the cavity should be lowered and the cooling time should be prolonged.
We are a professional molding company, sell different design of mold, 20L Pail Mould is one of them,welcome to visit our website.https://www.rixiangmould.com/
A critical component in Bucket Mould design is choosing the correct gate. The function of the gate is a simple concept, but choosing the wrong type of gating can cause several problems during processing. In this post, we’re going to discuss several different kinds of gate designs and how they’re used.
When choosing the gate type/location for a molded part, there are a few important factors to consider. The first is how the mold will be designed and where a gate can be located. Part orientation in the mold, show surface location, and action locations can limit the options for gating. Further design considerations are material selection, part volume/size and production functionality.
Some plastics are more sensitive to over-heating conditions. This is known as shear heating. Any time plastic is forced through a restricted area, there’s some amount of shear heating. Attempting to fill a large plastic part with a small gate will create excessive shear heating and could degrade the plastic. With that in mind, gate designs like submarine gates have limitations to the maximum size of the gate, which may eliminate the gate design as a possibility for larger parts. Furthermore, the gate could freeze off before the part is full.
Gate freeze is an important aspect of the injection molding process. Generally speaking, gates need to be large enough to fill out the cavity properly but small enough to "seal" the cavity (gate freeze). Gate freeze should occur when the cavity is completely packed out and ready to start the cooling process. Since the gate is small, it should cool off relatively quickly compared to the molded part or the feed system. Gate freeze allows the part to become isolated from the feed system and for the injection molding machine to move onto the cooling/charging phase of the molding process.
The function of the mold in the production environment is another consideration. A defining characteristic of the different kinds of gates is whether they break from the molded part automatically or require trimming. In higher volume applications, it becomes less feasible for an operator to trim gates manually. In this case, either factoring in robotic gate cutting (Nipping) or changing gate designs should be factored in. Scrap costs generated from cold runner systems may justify a hot runner where zero scrap is generated.
We are a professional molding company, sell different design of mold, 18L Pail Mould is one of them,welcome to visit our website.https://www.rixiangmould.com/
When choosing the gate type/location for a molded part, there are a few important factors to consider. The first is how the mold will be designed and where a gate can be located. Part orientation in the mold, show surface location, and action locations can limit the options for gating. Further design considerations are material selection, part volume/size and production functionality.
Some plastics are more sensitive to over-heating conditions. This is known as shear heating. Any time plastic is forced through a restricted area, there’s some amount of shear heating. Attempting to fill a large plastic part with a small gate will create excessive shear heating and could degrade the plastic. With that in mind, gate designs like submarine gates have limitations to the maximum size of the gate, which may eliminate the gate design as a possibility for larger parts. Furthermore, the gate could freeze off before the part is full.
Gate freeze is an important aspect of the injection molding process. Generally speaking, gates need to be large enough to fill out the cavity properly but small enough to "seal" the cavity (gate freeze). Gate freeze should occur when the cavity is completely packed out and ready to start the cooling process. Since the gate is small, it should cool off relatively quickly compared to the molded part or the feed system. Gate freeze allows the part to become isolated from the feed system and for the injection molding machine to move onto the cooling/charging phase of the molding process.
The function of the mold in the production environment is another consideration. A defining characteristic of the different kinds of gates is whether they break from the molded part automatically or require trimming. In higher volume applications, it becomes less feasible for an operator to trim gates manually. In this case, either factoring in robotic gate cutting (Nipping) or changing gate designs should be factored in. Scrap costs generated from cold runner systems may justify a hot runner where zero scrap is generated.
We are a professional molding company, sell different design of mold, 18L Pail Mould is one of them,welcome to visit our website.https://www.rixiangmould.com/
A multi-cavity mold is a mold with multiple cavities of the same part that is typically used to reduce piece-part pricing for higher volume parts.
In addition to a single item being produced in a molding process, the mold can also be designed to produce multiple numbers of the same part in the same process or at the same time. A custom injection Bucket Mould with a single impression is generally called a single cavity mold, and a custom injection mold with two or more cavities of the identical part is referred to as a multiple cavity mold (multi-cavity mold) or a multiple impression mold. High-volume molds, such as, bottle caps, zip ties or toothbrushes can have over 64 cavities.
A multiple cavity mold similar to a “family” mold; however, a family mold is different and is a custom injection mold that can produce multiple, similarly-sized parts in the same quantity, color and material. Family custom molded plastic parts are generally part of an assembly for a single plastic product, such as a top half and bottom half.
If you want more than tens of thousands of parts per month, then a Multi-Cavity Mold is for you. We recommend more than a single cavity mold when the capacity is going to be greater than 40,000 pieces a month. That capacity limitation is what would generally force you to buy a multi-cavity tool. We also recommend going with a multiple cavity mold when the customer is trying to meet a certain price point. When you with multiple cavities, know that your larger upfront investment in molds & mold design is rewarded with lower piece prices. It is this reward that sometimes drives customers to purchase multi-cavity molds even when capacity isn’t reached. A multi-cavity mold could be 2, or 64 cavities or anywhere in between.
You’ll quickly find out that what you are really buying is machine time. So the less machine time it takes to mold your parts, the less your parts will cost. Unfortunately, a multi-cavity mold can grow to quite an investment as cavities are added. But the sooner you make that investment, the sooner you can reap its rewards.
When going to a multi-cavity mold, there are certain design adjustments that need to be made given various considerations. Such as, gate types & placement, balanced flow, tight tolerances, consistent venting, the pressure & speed of flow required forcing molten plastic through a mold as the molds become larger and more complex.
We are a professional molding company, sell different design of mold, Pail Mould is one of them,welcome to visit our website.https://www.rixiangmould.com/
In addition to a single item being produced in a molding process, the mold can also be designed to produce multiple numbers of the same part in the same process or at the same time. A custom injection Bucket Mould with a single impression is generally called a single cavity mold, and a custom injection mold with two or more cavities of the identical part is referred to as a multiple cavity mold (multi-cavity mold) or a multiple impression mold. High-volume molds, such as, bottle caps, zip ties or toothbrushes can have over 64 cavities.
A multiple cavity mold similar to a “family” mold; however, a family mold is different and is a custom injection mold that can produce multiple, similarly-sized parts in the same quantity, color and material. Family custom molded plastic parts are generally part of an assembly for a single plastic product, such as a top half and bottom half.
If you want more than tens of thousands of parts per month, then a Multi-Cavity Mold is for you. We recommend more than a single cavity mold when the capacity is going to be greater than 40,000 pieces a month. That capacity limitation is what would generally force you to buy a multi-cavity tool. We also recommend going with a multiple cavity mold when the customer is trying to meet a certain price point. When you with multiple cavities, know that your larger upfront investment in molds & mold design is rewarded with lower piece prices. It is this reward that sometimes drives customers to purchase multi-cavity molds even when capacity isn’t reached. A multi-cavity mold could be 2, or 64 cavities or anywhere in between.
You’ll quickly find out that what you are really buying is machine time. So the less machine time it takes to mold your parts, the less your parts will cost. Unfortunately, a multi-cavity mold can grow to quite an investment as cavities are added. But the sooner you make that investment, the sooner you can reap its rewards.
When going to a multi-cavity mold, there are certain design adjustments that need to be made given various considerations. Such as, gate types & placement, balanced flow, tight tolerances, consistent venting, the pressure & speed of flow required forcing molten plastic through a mold as the molds become larger and more complex.
We are a professional molding company, sell different design of mold, Pail Mould is one of them,welcome to visit our website.https://www.rixiangmould.com/
General
The parting surfaces of a mould are those portion of both mould plates,adjacent to the impressions,which butt together to form a seal and prevent the loss of plastic material from the impression.
We can classify the parring as being either flat or mom-flat.Examples of the latter type include stepped,profiled and angled parting surfaces.
In gerenal,the flat parting surface is the simplest to manufacture and maintain.It can be surface-ground,and is easily bedded down.
To bed down a pair of Bucket Mould plates is the process of marrying the two mould surfaces together.This is accomplished by blueing one surface,momentarily bringing the two plates together and subsequently removing andy high spots which will be apparent on the non-blued surface.The plates are said to be bedded down when an even film of blue is transferred fron one plate to the other.
Flat parting surface
The mature of the parting surface depends entirely on the shape of the component for instance,consider the rectangular moulding shown in figure 5.1.The cavity for this article can be die-sunk into one mould plate.The position of the parting surface will therefore be at the top of the moulding,the parting surface itself being perfectly flat.For appearence this is the ideal arrangement as the parting line is not moticeable unless flash develops.Flash is the name given to the wafer of material which escapes from the impression if the two mould halves are not completely closed.
Non-flat parting surface
Many mouldings are required which have a parting line whhich lies on a non-planar or curved surface.In these cases the mould’s parting surface nust either be stwpped,profiled or angled.
Stepped parting surface
The maximum dimension of this component when viewed in the draw direction occurs at the top of the Z-form.Thus,as this form is stepped,the mould’s parting surface must like wise be steeped as shown 1.Note that as the edge of the component is square with the face(apart from moulding draft)the entire moulding form can be accommodated in one mould half .However,had the edge incorporated a radius,then in addition to the mould giving a stepped parting surface,the required edge form would have to be die-sunk into each of the mould halves.
Profiled parting surface
The moulding iss shown at(a)It will be noted that while in cross-section the moulding form is constant,the general form(side view)incorporates curves.As the edge of the component is square with the face the entire form can be die-sunk into one mould plate.Thus the general form of the parting surface will follow the inside surface of moulding.(b)To simplify the manufacture of a multi-impression mould it is often convenient to extend the profiled surface completely across the mould.(c)The individual impression can then be die-sunk as required.
Angled parting surface
The designer is frequently confroned with a component which,while fairly regular in form,can not be ejected from the mould if a flat parting surface is adopted.However,by adopting an angled parting surface all parts of the moulding are in line of draw and it can therefore be ejected.
Complex edge forms
So far,we have considered only components which have a constant dege form.Now we proceed to consufer other components where the dege form is mot constant.This often leads to quite complex parting surfaces but for the present consider the simple case.
Local stepped and profiled parting surfaces.
It is frequently necessary to incorporate a stepped or profiled surface to cater for one or two small irregulartites in an oterwise regular form.Normally,this is best achieved by localizing the change in parting surface to permit the major portion of the surface to be kept flat.
Balancing of mould surfaces
When the parting surface is not flat,there is the question of unbalanced forces to consider in certain instance.This is best illustrated by an example.The plastic material when under pressure within the impression,will exert a force which will tend to open the mould in the lateral direction(x)If this happens some flashing may occur on the angled facd the movement between the two mould halves will be resisted by the guide pillars,but even so,because of the large forces involved,it is desirable to balance the mould by reversingb the step so that the parting surface continues across the mould as a mittor inmage of the section which includes the impression.It is often convenient to specity an even number of impression.It is often convenient to specify an even number of impression when considering this type of mould,as impressions positioned on opposite sides of the mould”s center-line serve to balance the mould.
We are a professional molding company, sell different design of mold, Pail Mould is one of them,welcome to visit our website.https://www.rixiangmould.com/
The parting surfaces of a mould are those portion of both mould plates,adjacent to the impressions,which butt together to form a seal and prevent the loss of plastic material from the impression.
We can classify the parring as being either flat or mom-flat.Examples of the latter type include stepped,profiled and angled parting surfaces.
In gerenal,the flat parting surface is the simplest to manufacture and maintain.It can be surface-ground,and is easily bedded down.
To bed down a pair of Bucket Mould plates is the process of marrying the two mould surfaces together.This is accomplished by blueing one surface,momentarily bringing the two plates together and subsequently removing andy high spots which will be apparent on the non-blued surface.The plates are said to be bedded down when an even film of blue is transferred fron one plate to the other.
Flat parting surface
The mature of the parting surface depends entirely on the shape of the component for instance,consider the rectangular moulding shown in figure 5.1.The cavity for this article can be die-sunk into one mould plate.The position of the parting surface will therefore be at the top of the moulding,the parting surface itself being perfectly flat.For appearence this is the ideal arrangement as the parting line is not moticeable unless flash develops.Flash is the name given to the wafer of material which escapes from the impression if the two mould halves are not completely closed.
Non-flat parting surface
Many mouldings are required which have a parting line whhich lies on a non-planar or curved surface.In these cases the mould’s parting surface nust either be stwpped,profiled or angled.
Stepped parting surface
The maximum dimension of this component when viewed in the draw direction occurs at the top of the Z-form.Thus,as this form is stepped,the mould’s parting surface must like wise be steeped as shown 1.Note that as the edge of the component is square with the face(apart from moulding draft)the entire moulding form can be accommodated in one mould half .However,had the edge incorporated a radius,then in addition to the mould giving a stepped parting surface,the required edge form would have to be die-sunk into each of the mould halves.
Profiled parting surface
The moulding iss shown at(a)It will be noted that while in cross-section the moulding form is constant,the general form(side view)incorporates curves.As the edge of the component is square with the face the entire form can be die-sunk into one mould plate.Thus the general form of the parting surface will follow the inside surface of moulding.(b)To simplify the manufacture of a multi-impression mould it is often convenient to extend the profiled surface completely across the mould.(c)The individual impression can then be die-sunk as required.
Angled parting surface
The designer is frequently confroned with a component which,while fairly regular in form,can not be ejected from the mould if a flat parting surface is adopted.However,by adopting an angled parting surface all parts of the moulding are in line of draw and it can therefore be ejected.
Complex edge forms
So far,we have considered only components which have a constant dege form.Now we proceed to consufer other components where the dege form is mot constant.This often leads to quite complex parting surfaces but for the present consider the simple case.
Local stepped and profiled parting surfaces.
It is frequently necessary to incorporate a stepped or profiled surface to cater for one or two small irregulartites in an oterwise regular form.Normally,this is best achieved by localizing the change in parting surface to permit the major portion of the surface to be kept flat.
Balancing of mould surfaces
When the parting surface is not flat,there is the question of unbalanced forces to consider in certain instance.This is best illustrated by an example.The plastic material when under pressure within the impression,will exert a force which will tend to open the mould in the lateral direction(x)If this happens some flashing may occur on the angled facd the movement between the two mould halves will be resisted by the guide pillars,but even so,because of the large forces involved,it is desirable to balance the mould by reversingb the step so that the parting surface continues across the mould as a mittor inmage of the section which includes the impression.It is often convenient to specity an even number of impression.It is often convenient to specify an even number of impression when considering this type of mould,as impressions positioned on opposite sides of the mould”s center-line serve to balance the mould.
We are a professional molding company, sell different design of mold, Pail Mould is one of them,welcome to visit our website.https://www.rixiangmould.com/
There are 5 levels of injection mould maintenance:
level 1. Routine Maintenance
Before the mold is removed from the press, it is to be heated so that all surface condensation is evaporated. With the 20L Bucket Mould still warm, internalmold surfaces should be gently cleaned with shop safety solvent to remove any residual dirt and grime, the ejector system moved fully forward, then sprayed with approved rust preventive before the ejector system is retracted and the mold closed. Lenses and highly polished surfaces should be protected following specificinstructions. All water lines should be drained and blown free of all residual water to avoid buildup of rust due to standing water. It is imperative that no water be trapped insidemold. Check and assure all bolts, plates, clamps etc. are in place and tight. Bag the last shot as an example of the typical quality of this run. Store these partswith the mold.
level 2. Simple Preventive Maintenance
Open the mold. Using properly approved safety shop solvent, remove the mold preservative with a lint free pad. It is bad practice to immediately run parts on the assumption that the first shots will scrape away the protective coating and will therefore be used to clean out the mold preservative.
level 3. Inspection Maintenance
This maintenance is performed by the lead operator or a tool maker at the end of aproduction run. Using the check list and visual inspection techniques, the mold is looked over and any minor repairs that are necessary are noted for the convenienceof the General Maintenance procedure. If not, needed repairs or future required touch up notations are kept with the mold history log for future evaluation. Any components missing or cavity blocked off should be noted and attended to. A sample from the blocked cavity should be retained for the mold maker to make repairs. The mold should be washed with safety solvent to remove the varnish and build upfrom the molding process. The vents should be checked for depth in a minimum of four clockface places aroundthe cavity face. Notations for work to be done during the General Maintenance procedure should be noted on the form for future work Bent, worn or broken ejector pins should be noted. The mold should be removed from production and the pins replaced.
Level 4. General Maintenance
Only competently trained tool room technicians should perform this maintenance. All plates are separated and their faces cleaned. Caution: Highly polished surfaces should not be cleaned with brushes or rags. Use only uncontaminated facial tissues or cotton balls. Loosen dirt by spraying cleaning fluid into cavity and wipe clean with clean cotton balls. Do not touch with fingers, dust on fingertips may scratch apolished surface. Be careful when blowing a cavity out, there may be dust or rust in the air lines which may damage the polished cavity. All components are checked for wear. Any excessive wear is noted and a determination is made to repair, replace or continue to use. All rough areas outside the cavity detail area are to be worked out. Any area insidethe cavity detail area with dings, dents or other signs of wear or abuse should beconsidered critical and should be carefully analyzed before replacements or repairs are commenced. All moving parts are to be lubricated if required. Use lubricant sparingly on all moving parts which make contact with plastic partsVents should be checked for depth, width and land as compared to the tool drawing specifications. This data should be recorded on the check list and a determinationmade to repair if required. They should also be checked for corrosion and vent burns “O” rings, seals and gaskets should be checked for integrity. All water lines are to be pressure tested for leaks and recertified for flow capacity.Water lines that have built up scale and are restricted should be pressure cleanedwith a descaling agent. The ejector system is to be examined for proper alignment. If the ejector pin holes have become egg shaped it must be determined if they should be redrilled and bored to a larger size and the existing pins replaced with over size pins. Broken return springs, replating or retexturing as a result of the material eroding the 18L Bucket Mould surface, replacement of gates or gate inserts, new runner blocks etc. must be analyzed and determined. Replace all springs after 50,000 cycles.https://www.rixiangmould.com/
level 1. Routine Maintenance
Before the mold is removed from the press, it is to be heated so that all surface condensation is evaporated. With the 20L Bucket Mould still warm, internalmold surfaces should be gently cleaned with shop safety solvent to remove any residual dirt and grime, the ejector system moved fully forward, then sprayed with approved rust preventive before the ejector system is retracted and the mold closed. Lenses and highly polished surfaces should be protected following specificinstructions. All water lines should be drained and blown free of all residual water to avoid buildup of rust due to standing water. It is imperative that no water be trapped insidemold. Check and assure all bolts, plates, clamps etc. are in place and tight. Bag the last shot as an example of the typical quality of this run. Store these partswith the mold.
level 2. Simple Preventive Maintenance
Open the mold. Using properly approved safety shop solvent, remove the mold preservative with a lint free pad. It is bad practice to immediately run parts on the assumption that the first shots will scrape away the protective coating and will therefore be used to clean out the mold preservative.
level 3. Inspection Maintenance
This maintenance is performed by the lead operator or a tool maker at the end of aproduction run. Using the check list and visual inspection techniques, the mold is looked over and any minor repairs that are necessary are noted for the convenienceof the General Maintenance procedure. If not, needed repairs or future required touch up notations are kept with the mold history log for future evaluation. Any components missing or cavity blocked off should be noted and attended to. A sample from the blocked cavity should be retained for the mold maker to make repairs. The mold should be washed with safety solvent to remove the varnish and build upfrom the molding process. The vents should be checked for depth in a minimum of four clockface places aroundthe cavity face. Notations for work to be done during the General Maintenance procedure should be noted on the form for future work Bent, worn or broken ejector pins should be noted. The mold should be removed from production and the pins replaced.
Level 4. General Maintenance
Only competently trained tool room technicians should perform this maintenance. All plates are separated and their faces cleaned. Caution: Highly polished surfaces should not be cleaned with brushes or rags. Use only uncontaminated facial tissues or cotton balls. Loosen dirt by spraying cleaning fluid into cavity and wipe clean with clean cotton balls. Do not touch with fingers, dust on fingertips may scratch apolished surface. Be careful when blowing a cavity out, there may be dust or rust in the air lines which may damage the polished cavity. All components are checked for wear. Any excessive wear is noted and a determination is made to repair, replace or continue to use. All rough areas outside the cavity detail area are to be worked out. Any area insidethe cavity detail area with dings, dents or other signs of wear or abuse should beconsidered critical and should be carefully analyzed before replacements or repairs are commenced. All moving parts are to be lubricated if required. Use lubricant sparingly on all moving parts which make contact with plastic partsVents should be checked for depth, width and land as compared to the tool drawing specifications. This data should be recorded on the check list and a determinationmade to repair if required. They should also be checked for corrosion and vent burns “O” rings, seals and gaskets should be checked for integrity. All water lines are to be pressure tested for leaks and recertified for flow capacity.Water lines that have built up scale and are restricted should be pressure cleanedwith a descaling agent. The ejector system is to be examined for proper alignment. If the ejector pin holes have become egg shaped it must be determined if they should be redrilled and bored to a larger size and the existing pins replaced with over size pins. Broken return springs, replating or retexturing as a result of the material eroding the 18L Bucket Mould surface, replacement of gates or gate inserts, new runner blocks etc. must be analyzed and determined. Replace all springs after 50,000 cycles.https://www.rixiangmould.com/
Paint Pail Moulds are often used in our lives. We can use them to describe which liquids can be filled in plastic buckets. We have introduced them in detail. Today, plastic drum manufacturers will explain the packaging technology of plastic bucket.
Motion control packaging bucket packaging technology. The application of motion control products on the packaging machine is mainly to achieve precise position control and strict speed synchronization for loading, unloading, conveying, marking, palletizing, depalletizing and other processes. Due to the rapid development of China’s packaging industry, China will need more high-end packaging machinery, and sports control products will gain more room for development in this industry.
Man-machine interface packaging bucket packaging technology. The HMI of the packaging machine is usually used in conjunction with a PLC or a single-chip microcomputer to set production process parameters, monitor the operating status of the equipment, and record the production history of the equipment. A few high-end machines use touch screens.
Transmission control packaging bucket packaging technology. The use of transmission products on packaging machinery is primarily to adjust the main process speed and to control the periodic variation of the motor speed during the production process. However, for most packaging machines, the frequency converter is not a mandatory electrical product. The frequency converter has a low utilization rate in the industry, and there is a large room for development in large standard gauge machines and packaging production lines,Such as 20L Pail Mould.
The development of technology is becoming more and more mature. I believe that in the future development process, there will be better technological innovations, which will bring about changes in the entire industry.https://www.rixiangmould.com/
Motion control packaging bucket packaging technology. The application of motion control products on the packaging machine is mainly to achieve precise position control and strict speed synchronization for loading, unloading, conveying, marking, palletizing, depalletizing and other processes. Due to the rapid development of China’s packaging industry, China will need more high-end packaging machinery, and sports control products will gain more room for development in this industry.
Man-machine interface packaging bucket packaging technology. The HMI of the packaging machine is usually used in conjunction with a PLC or a single-chip microcomputer to set production process parameters, monitor the operating status of the equipment, and record the production history of the equipment. A few high-end machines use touch screens.
Transmission control packaging bucket packaging technology. The use of transmission products on packaging machinery is primarily to adjust the main process speed and to control the periodic variation of the motor speed during the production process. However, for most packaging machines, the frequency converter is not a mandatory electrical product. The frequency converter has a low utilization rate in the industry, and there is a large room for development in large standard gauge machines and packaging production lines,Such as 20L Pail Mould.
The development of technology is becoming more and more mature. I believe that in the future development process, there will be better technological innovations, which will bring about changes in the entire industry.https://www.rixiangmould.com/
