Injection molding is also called injection molding, which is a method for molding and injection molding. Advantage of the method is the injection molding production speed, high efficiency operation can be automated, many varieties, can be complex shapes, from simple to descending size may be, but precise product size, and easy replacement products, can become a complex shape parts, injection molding and suitable for mass production of molded products of complex shape machining.
　　At a certain temperature, it is stirred by the screw completely melted plastic material, with high pressure, into the mold cavity, after solidified by cooling, a method to obtain a molded article. This method is suitable for mass production of complex shape member, it is one of important processing methods.
　　Repeating the above process, can produce a periodic batch article. Molded thermosetting plastics and rubbers The same procedure may also include, but lower than the temperature of the thermoplastic cylinder, but a high injection pressure, the mold is heated in the mold after injection material subject to curing or vulcanization process, and then hot release .
　　Nowadays the trend is moving in the process direction of development of high-tech, these techniques include: micro-injection molding, composite injection molding highly filled, water-assisted injection molding, in particular a mixture of various injection molding, foam injection molding, mold technology, simulation technology.