As is well known, the selection of injection mold materials in injection molding determines its quality, and injection molding is an indispensable part of plastic molding processing. Its proportion in the total mold production has been increasing year by year. According to statistics, the processing and manufacturing of injection molds account for about 33% of the entire molding mold production. Therefore, its position in the national economy is becoming increasingly important. The main factors affecting the service life of plastic mold include mold structure, mold material, mold processing quality, mold working status, product part status, etc. In this process, the performance and heat treatment of the mold material itself play a crucial role. Processing and manufacturing of ordinary injection mold materials.

At present, most carbon steel mold steels have a wide range of applications due to their low price, easy use, and certain mechanical properties. In addition to plastic mold steel, there are also other mold steels such as pre hardened plastic mold steel, among which there are many types of mold steels. Currently, the commonly used ones include pre hardened plastic mold steel, carburized plastic mold steel, and time hardened plastic mold steel. Hardened plastic mold steel is a hardness rule applied during steel processing. This type of steel has excellent cutting performance and can be directly used for inner cavity processing. Generally used for the processing of a large number of plastic products, such as mirror molds, using 32-40HRC to calculate hardness.

Selection, manufacturing, and manufacturing of mold materials.

Exquisite polishing craftsmanship and functionality.

The quality of injection molded products is excellent, and the surface roughness value of the mold cavity is required to be small. If the surface roughness of the injection mold cavity is required to be less than Ra0.1-0.25, the optical surface is required to be less than Ra0.01nm, and the cavity needs to be polished to reduce surface roughness. Therefore, the selected steel requires minimal impurities, uniform arrangement, no fiber guidance, and should not have any pitting or orange peel like defects during polishing.

Excellent thermal stability;

The shapes of parts in injection molds are often complex and difficult to process after quenching. Therefore, materials with good thermal stability should be selected as much as possible. After heat treatment of plastic mold forming and processing, due to the small coefficient of linear expansion and heat treatment deformation, the standard change rate caused by temperature differences is small, and the metallographic arrangement and standard mold are stable, which can reduce or stop processing and ensure the standard accuracy and surface roughness requirements of plastic molds.