1. High corrosion resistance has corrosion effect on the surface of the cavity. This corrosion causes the metal of the cavity surface metal to erode and peel off, the surface condition deteriorates, and the mass of plastic parts deteriorates. Therefore, using corrosion -resistant steel, chrome plating and nickel treatment on the surface of the cavity.
2. The gloss and accuracy of the surface of plastic plastic parts with good abrasion resistance is directly related to the abrasion resistance of the plastic mold cavity surface, especially when some plastic adds glass fiber, inorganic fillers and certain pigments, they are added, they With the plastic melt, it flows quickly in the runner and mold cavity. The friction of the surface of the cavity is very large. If the material is not wear -resistant, it will soon wear and damage the quality of the plastic parts.
3. Good size stability When plastic molding, the temperature of the plastic mold cavity reaches above 300 ° C. For this reason, it is best to choose tool steel (thermal treatment steel) that is appropriately recovered. Otherwise, it will cause changes in the micro -structures of the material, causing changes in the size of the plastic mold.
4. Most of the easy -to -process mold parts are made of metal materials. Some structural shapes are also very complicated. In order to shorten the production cycle and improve efficiency, the mold material is easy to process into the shape and accuracy required by drawings.
5. Plastic plastic parts are usually required to have good gloss and surface status. Therefore, the roughness of the cavity surface is very small. In this way, the surface of the cavity must be processed on the surface, such as polishing and grinding. Therefore, the selected steel should not contain rough impurities and pores.
6. In order to raise the hardness and abrasion resistance, the heating treatment is generally heat treatment for plastic molds, but this treatment should make the size change very small. Therefore, the pre -jitan steel that can cut processing is used.
