Method for controlling drive of screw in injection molding machine

摘要

The present invention is applicable to an injection molding machine comprising an injection device having a servo motor for use in rotating a screw and a controller for controlling the servo motor. The controller has a rotation speed N previously set therein as a set value for the screw rotation in a metering process. The controller rotates the screw at an acceleration A1 until the rotation speed of the screw reaches a value NK (where NK<N). After that the controller carries out a control operation to rotate the screw at an acceleration A2 until the rotation speed of the screw reaches the value N. The acceleration A2 is higher than the acceleration A1.