Brief introduction to the classification of four kinds of automobile moulds
In a narrow sense, the automobile mold is the general name of the mold for punching all the stamping parts on the automobile body. That is, "automobile body stamping die". For example, the top cover flanging die, the beam reinforcement plate pressing die, etc.
1. Extrusion die Extrusion die head is also called extrusion die head. This mold can continuously produce plastic with the same section shape, such as plastic pipe, bar, sheet, etc. The heating and pressure device of the extruder is the same as that of the injection molding machine. The molten plastic will form continuous plastic parts after passing through the die head, and the production efficiency is particularly high. In addition to the plastic molds listed above, there are vacuum molding molds, compressed air molds, blow molding molds, low foaming plastic molds, and so on. Stamping parts on the body are generally divided into covering parts, beam frame parts and general stamping parts. The stamping parts that can clearly show the image characteristics of the car are the car cover parts. Therefore, a more specific automobile die can be said to be "automobile panel stamping die". Stamping die for automobile panel. For example, the front door outer panel trimming die, the front door inner panel punching die, etc.
2. Injection mold Injection mold is also called injection mold. The molding process of the mold is characterized by putting plastic raw materials into the heating cylinder of the injection molding machine. The plastic is heated and melted, pushed by the screw or plunger of the injection molding machine, and enters the mold cavity through the nozzle and pouring system of the mold. After heat preservation, pressure maintaining and cooling, the plastic is solidified in the mold cavity. Because the heating and pressure device can play its role in stages, injection molding can not only form plastic parts with complex shapes, but also have high production efficiency and good quality. Therefore, injection molding accounts for a large proportion in the molding of plastic parts, and injection mold accounts for more than half of the plastic molding mold. The injection molding machine is mainly used for the molding of thermoplastics. In recent years, it is also gradually used for the molding of thermosetting plastics.
3. Die The press mold is also called the press mold or the press rubber mold. The molding process of the mold is characterized by adding plastic raw materials directly into the open mold cavity, and then closing the mold. After the plastic melts under the action of heat and pressure, the mold cavity is filled with certain pressure. At this time, the molecular structure of the plastic undergoes chemical cross-linking reaction and gradually hardens and forms. Compression molds are mostly used for thermosetting plastics, and molded plastic parts are mostly used for the shells of electrical switches and daily necessities.
4. Transmission module Transfer mold is also called injection mold or extrusion mold. The molding process of the mold is characterized by adding plastic raw materials into the preheated feed chamber, and then applying pressure to the plastic raw materials in the feed chamber through the pressure column. The plastic melts under high temperature and pressure, enters the mold cavity through the pouring system of the mold, and then undergoes chemical cross-linking reaction, and gradually solidified. The transfer process is mainly used for thermosetting plastics and can be used to form plastic parts with complex shapes.