INJECTION MOLDING MACHINE CONSTRUCTION AND METHOD OF OPERATION

摘要

INJECTION MOLDING MACHINE CONSTRUCTION AND METHOD OF OPERATION An injection molding machine comprises an injection cylinder having a discharge spaced from an inlet and a fluid pressure operated plasticizing and injection screw which is axially movable and rotatable in said cylinder. Means are provided to measure the distance of axial displacement of the screw, the rotational speed of the screw and the fluid pressure necessary for displacing the screw and these are connected to a programmable device. The injection molding machine is operated by using the programmable device to simultaneously control the rotational speed of the screw and the fluid pressure required for moving the screw as a function of the travel distance of the screw during the plasticizing and dosing operation.