Plastic injection molding machine consist of three units namely Clamping Unit, the Injection Unit, and the Drive Unit.
The functions of the clamping unit are to hold the mold, close and open during the operation. The fixed and moving plates, the tie bars and the mechanism for opening, closing and clamping are the parts of the clamping unit.
The function of injection unit or plasticizing unit is to melts the polymer resins and injects it into the mold.