Summary: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......
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 the shells of electrical switches and daily necessities.
Transfer mold: transfer mold is also called injection mold or extrusion mold. The molding process of this mold is characterized by adding plastic raw materials into the preheated feeding chamber, and then applying pressure to the plastic raw materials in the feeding 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 The chemical cross-linking reaction occurs and gradually solidifies into shape. The transfer molding process is mostly used for thermosetting plastics, which can mold plastic parts with complex shapes.
Extrusion die: 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.
In addition to the types of plastic molds listed above, there are vacuum forming molds, compressed air molds, blow molding molds, low-foaming plastic molds, and the like.
The stamping parts on the automobile body 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. Therefore, the more specific automobile mold can be said to be "car panel stamping mold". Referred to as automobile cover die. For example, front door outer panel trimming die, front door inner panel punching die, etc.