Plastic injection molding varies depending on the processing material. Injection molding of thermoplastics includes feeding, plasticization, injection, pressure maintaining, cooling, demoulding and other processes. The molding of thermosetting plastics and rubber also includes the same process, but the barrel temperature is lower than that of thermoplastic plastics, the injection pressure is higher, and the mold is heated. After the injection of materials, it needs to go through the curing or vulcanization process in the mold, and then take off the film while it is hot.
Plastic injection molding refers to the molding of a model with a certain shape by injecting the melted colloid into the mold cavity through pressure. The process principle is: melt the solid plastic according to a certain melting point, inject it into the mold at a certain speed through the pressure of the injection machine, and the mold solidifies the plastic through water cooling to obtain the same product as the design mold cavity.
Plastic injection molding (injection molding) is a method to make the thermoplastic or thermosetting molding compound plasticize evenly in the heating barrel, and then push it into the mold cavity of the closed mold by the plunger or moving screw.
Injection molding is applicable to almost all thermoplastics. Injection molding has also been successfully used to form some thermosetting plastics. The molding cycle of injection molding is short (a few seconds to a few minutes), and the quality of molded products can range from a few grams to tens of kilograms. It can form molded products with complex shape, accurate size and metal or non-metal inserts at one time. Therefore, this method has strong adaptability and high production efficiency.
