The structure of plastic injection mold is usually composed of molding parts, pouring system, guiding parts, pushing mechanism, temperature regulation system, exhaust system, supporting parts, and so on. The manufacturing materials usually use plastic mold steel modules, and the commonly used materials are mainly carbon structural steel, carbon tool steel, alloy tool steel, high-speed steel, etc. The injection molding processing method is usually only suitable for the production of thermoplastic products. The plastic products produced by the injection molding process are very common. From daily necessities to various complex machinery, electrical appliances, and transportation parts, they are all formed by injection molds. It is a widely used processing method in the production of plastic products.
Plastic compression molds include two types of structural molds: compression molding and injection molding. They are a type of mold mainly used to mold thermosetting plastics, and their corresponding equipment is a press molding machine. Compression molding method According to the characteristics of the plastic, the mold is heated to the molding temperature (usually 103°-108°), and then the measured compression molding powder is put into the mold cavity and the feeding chamber, the mold is closed, and the plastic is under the action of high heat and high pressure. It is hardened and viscous flow, and after a certain period of time, it is solidified and shaped to become the desired shape of the product. The difference between injection molding and compression molding is that there is a separate feeding chamber. Before molding, the mold is closed first. The plastic is preheated in the feeding chamber and is in a viscous flow state. Under the action of pressure, it is adjusted and squeezed into the mold cavity to harden and form. Compression molds are also used to form some special thermoplastics such as difficult-to-melt thermoplastics (such as polyvinyl fluoride) blanks (cold-pressed), resin lenses with high optical performance, thin foamed nitrocellulose car steering wheels, etc. The compression mold is mainly composed of a cavity, feeding cavity, guiding mechanism, ejecting parts, heating system, etc. Injection molds are commonly used in packaging electrical components. The materials used in the manufacture of compression molds are basically the opposite of injection molds.