How injection molds work
Injection mold is a tool for producing plastic products; it is also a tool that gives plastic products complete structure and precise dimensions. Injection molds are the parts that give shape and size to plastics during molding. Although the structure of the mold may vary due to different types and properties of plastics, shapes and structures of plastic products, and types of injection machines, the basic structure is the same.
Injection mold working principle
Injection molding is a processing method used in the mass production of certain parts with complex shapes. Specifically, it refers to injecting heated and melted plastic into the mold cavity at high pressure from an injection molding machine. After cooling and solidifying, a molded product is obtained. Among them, the pouring system and molded parts are the parts that are in direct contact with plastics and change with the plastics and products. They are the most complex and changing parts of the mold and require the highest processing smoothness and precision.
The plastic is first heated and melted in the heating barrel at the bottom of the injection machine. Then, driven by the screw or plunger of the injection machine, it enters the mold cavity through the injection machine nozzle and the mold's gating system. The plastic is cooled, hardened, formed, and demoulded to obtain the product. Its structure usually consists of molding parts, pouring system, guide parts, push-out mechanism, temperature adjustment system, exhaust system, support parts and other parts. Manufacturing materials usually use plastic mold steel modules. 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. Plastic products produced by the injection molding process are very wide, ranging from daily necessities to various complex machinery, electrical appliances, transportation parts, etc., are all molded with injection molds. It is the most widely used processing method in the production of plastic products
