High corrosion resistance of injection molds, many resins and additives have a corrosive effect on the appearance of the cavity. This corrosion causes the metal on the surface of the cavity to dissolve and peel, the appearance becomes poor, and the quality of the plastic parts deteriorates. Therefore, the cavity surface is made of corrosion-resistant steel or plated with chrome and c-nickel.
Injection mold parts have good gloss and high precision. The wear resistance of plastic mold cavities is directly related, especially when glass fibers, inorganic fillers and certain pigments are added to some plastics, which flow with the plastic melt. Move quickly through channels and cavities.
There's a lot of friction out there. If the material is not wear-resistant, it will wear out quickly, damaging the quality of the plastic parts. Shenzhen injection molding
Excellent dimensional stability During the plastic molding process, the temperature of the plastic cavity should reach above 300°C.
Therefore, injection molds use properly tempered tool steel (heat treated steel). Otherwise, the microstructure of the material changes, which in turn leads to a change in the dimensions of the plastic mold. The easy-to-process injection mold parts are mainly made of metal materials, and some structural shapes are very complex.
In order to shorten the production cycle and improve the efficiency, the mold material is required to be easily processed into the shape and precision required by the drawing. Precision plastic mold
Excellent polishing performance Plastics and plastic parts generally require excellent gloss and appearance, so the surface roughness of the cavity is very small. This necessitates treatment of the appearance of the cavity, such as polishing and grinding.
Therefore, the selected steel should not contain coarse impurities and pores. Less affected by heat treatment In order to improve hardness and wear resistance, injection molds are generally heat treated, but this treatment should make dimensional changes small. Therefore, cuttable pre-hardened steel is used.
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