What Are the Categories of Automotive Plastic Moulds?

There are many ways to classify automobile plastic molds, which can be divided into the following categories according to the different methods of forming and processing plastic parts:

1. Automotive plastic moulds and injection molds

Injection mold is also called injection mold. The molding process of this mold is characterized by placing the plastic raw material in the heated 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 nozzle and the pouring system of the automobile plastic 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 in the molding of plastic parts, and injection molds account 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.

2. Automotive plastic moulds and compression molds

Compression molds are also known as compression molds or compression molds. The molding process of this kind of mold is characterized in that the plastic raw material is 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 a certain 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 electrical switch housings and daily necessities.

3. Automotive plastic mould and transfer mold

Transfer mold is also known as injection molding or extrusion mold. The molding process of this automobile plastic mold is characterized by adding plastic raw materials into the preheated charging chamber, and then applying pressure to the plastic raw materials in the charging chamber by the pressure column. The plastic is melted under high temperature and high pressure and enters the cavity through the casting system of the mold. , and then a chemical cross-linking reaction occurs to gradually cure and form. The transfer molding process is mostly used for thermosetting plastics, which can mold plastic parts with complex shapes.

4. Automotive plastic moulds and extrusion molds

Extrusion die is also called extruder head. This automotive plastic mould 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.

In addition to the types of automotive plastic moulds listed above, there are also vacuum forming molds, compressed air molds, blow molding molds, and low-foaming plastic molds.