Screw

The function of the screw is to plasticise, or melt, the plastics material.


In addition, the force of the screw turning pushes the melted plastics to the front of the injection unit. The screw then acts like a plunger and forces the melted plastics material into the closed mould.

Screw Drive Motor

A screw drive motor turns the screw counterclockwise. Typically, this is a hydraulic motor; however, some specialised machines use electric motors.