General injection molding machine includes injection device, clamping device, hydraulic system and electrical control system. The basic requirements of injection molding are plasticization, injection and molding. Plasticization is the premise to realize and ensure the quality of molded products. In order to meet the requirements of molding, injection must ensure sufficient pressure and speed. At the same time, due to the high injection pressure, a high pressure is generated in the mold cavity (the average pressure in the mold cavity is generally between 20 ~ 45MPa), so there must be enough clamping force.

It can be seen that the injection device and clamping device are the key components of the injection molding machine.