Mesin cetakan injeksi lan jarum suntik sing digunakake kanggo injeksi duwe prinsip kerja sing meh padha. Iki minangka proses ing endi plastik cair cair (yaiku kahanan aliran kenthel) disuntikake menyang rongga cetakan sing ditutup kanthi dorong sekrup (utawa plunger), lan produk kasebut dipikolehi sawise solidifikasi lan bentuk.
Pisanan, lebokake plastik butiran utawa bubuk ing tong sakamesin cetakan injeksi. Plastik kasebut dilebur kanthi muter of the screw and the outer wall of the barrel. Then the machine closes the mold and moves the injection seat forward, and the nozzle is close to the gate of the mold. , And then pass the pressure oil through the injection cylinder and push the screw forward. Thus, the molten material is injected into the closed mold with a lower temperature at a high pressure and a faster speed. After a certain period of time and pressure holding (also called pressure holding), cooling, solidification and molding, the product can be opened and the product can be taken out. (To ensure that the product has a certain density and dimensional tolerances, it is the purpose of maintaining pressure to supplement the material in the cavity to avoid the reflux of the melt in the cavity). Plasticization, injection and molding are the basic requirements of injection molding. The prerequisite for the quality of the formed product to be achieved and guaranteed is plasticization, and there is a high pressure response in the cavity (20-45MPa is usually the average pressure in the cavity), so the mesin cetakan injeksi has enough Large clamping force. It can be seen that the injection device and clamping device of the key part of the mesin cetakan injeksi.