Although the structure of the mold may vary greatly due to different types and properties of plastics, the shape and structure of plastic products, and the type of injection machine, the basic structure is consistent. The mould is mainly composed of pouring system, heating system, forming parts and structure parts. Among them, the pouring system and the forming parts are the parts that are in direct contact with plastics and change with plastics and products. They are the most complex and most varied parts of the mold and require the highest degree of finish and accuracy.
Injection mold is composed of two parts: moving mold and fixed mold. The moving mold is installed on the moving template of the injection molding machine, and fixed mold is installed on the fixed template of the injection molding machine. The casting system and cavity are formed by the closing of the dynamic and fixed modes during injection molding, and the dynamic and fixed modes are separated to remove the plastic products. In order to reduce the heavy mould design and manufacturing workload, most of the injection molds use standard molds.