The stamping parts of automobile body molds are generally divided into cover parts, beam parts, and general stamping parts. Stamping parts that can clearly express the characteristics of the car's image are car covers.

　　There are many ways to classify car parts mould. The different methods of forming and processing plastic parts, it can be divided into the following categories:

　　Compression mold: Compression mold is also known as compression mold or compression mold. The molding process of this kind of mold is characterized in that the plastic raw material being directly added into the open mold cavity, and then the mold is closed. After the plastic is in a molten state under the action of heat and pressure, the cavity is filled with pressure. At this time, the molecular structure of the plastic produces a chemical cross-linking reaction, which gradually hardens and sets. Compression molds are mostly used for thermosetting plastics, and their molded plastic parts are mostly used for the shells of electrical switches and daily necessities.

　　Extrusion dies: Extrusion die is also called extruder head. This mold can continuously produce plastics with the same cross-sectional shape, such as plastic pipes, rods, sheets, etc. The heating and pressurizing device of the extruder is the same as that of the injection machine. The molten plastic passes through the machine head to form a continuous molding plastic part, and the production efficiency is particularly high.

　　Injection mold: Injection mold is also called injection mold. The molding process of this mold is characterized by placing the plastic material in the heating barrel of the injection machine. The plastic is heated and melted and driven by the screw or plunger of the injection machine, it enters the mold cavity through the pouring system of the nozzle and the mold. Since the heating and pressing device can function in stages, injection molding can not only mold plastic parts with complex shapes but also has high production efficiency and good quality. Therefore, injection molding occupies a large proportion of the molding of plastic parts, and plastic Injection mould accounts for more than half of plastic molding molds. Injection machines are mainly used for the molding of thermoplastics, and in recent years, they have also been gradually used for the molding of thermosetting plastics.