The working principle of the injection molding machine is similar to the principle of the syringe. Under the push of the screw, the plastic is injected into the closed mold cavity, and the process of curing and shaping the product is obtained in the closed mold cavity. This process mainly includes four stages, which are: filling, pressure holding, cooling and demoulding, which is a complete and continuous process. Below, Xiaobian tell you about the specific production process of the injection molding machine.