Plastic mold, plastic processing industry and plastic molding machine matching, give plastic products with complete configuration and precise size tools.  Due to the variety of plastic and processing methods, plastic molding machines and plastic products are different in structure, so the types and structures of plastic molds are diverse.  

Mold design and manufacture are closely related to plastic processing.  The success or failure of plastic processing depends largely on the effect of mold design and mold manufacturing quality, and the design of plastic mold is based on the correct design of plastic products.  

The hardness of plastic mold is usually below 50-60HRC, and the mold after heat treatment should have enough surface hardness to ensure that the mold has enough stiffness.  Mold in the work because of the plastic filling and flow to bear large compressive stress and friction, the mold is required to maintain the stability of shape accuracy and dimensional accuracy, to ensure that the mold has enough service life.  The wear resistance of die depends on the chemical composition of steel and the hardness of heat treatment, so improving the hardness of die is beneficial to improve its wear resistance.