According to the requirements of injection molding process, injection molding machine is a mechanical and electrical integration of injection molding machine, mainly composed of injection parts, closing parts, body, hydraulic system, heating system, control system, feeder and so on.

Typical structure of injection assembly 1. At present, the commonly used injection molding device has single cylinder form and double cylinder form, the injection molding machine of our factory is double cylinder form, through the hydraulic motor directly drive the screw injection molding. Because of different manufacturers, molding injection molding machine, the composition of a different model of the machine is not exactly the same, the next face of the machine used by our factory to do specific analysis. As shown in Figure 3 and Figure 4, the composition diagram of the injection molding device of the vertical and horizontal machine. The working principle is: when pre-plastic, the screw in the plasticized part is driven by the hydraulic motor to rotate the main shaft, one end of the main shaft is connected with the screw key, the other end is connected with the hydraulic motor key, the screw rotates, after the material is plasticized, the material is plasticized and the plasticized molten material is pushed to the storage chamber at the front of the barrel, and the screw is backed up under the action of the material reaction.