According to the structure of plastic molds, what are the two main categories?

First, the basic knowledge of molds: molds are divided into non-plastic molds such as casting molds, forging molds, die-casting molds, stamping molds, and plastic molds. In recent years, with the rapid development of plastic industry, the strength and precision of general plastics and engineering plastics have been continuously improved, and the application scope of plastic products has been continuously expanded, such as household appliances, instruments and meters, construction equipment, automobile industry, daily hardware and many other fields, and the proportion of plastic products has increased rapidly. A reasonably designed plastic part can often replace many traditional metal parts. The plasticizing trend of industrial products and daily products is on the rise. 2. General definition of mold: In industrial production, metal or nonmetal materials are made into parts or products with required shapes by various presses and special tools installed on the presses. This special tool is collectively called the mold. 3. Description of injection molding process: Mold is a tool for producing plastic products. It is composed of several groups of parts, and there is a molding cavity in this combination.