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
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