Patent ID: 6284170
Filing Date: 2001-09-04
Classification: B29B,B29C

Abstract:
A method for controlling drive of a screw in an injection molding machine, said method comprising the steps of:providing an injection device having a driving source for rotating the screw and a controller for controlling the driving source, wherein the controller has a rotation speed N which is previously set therein as a set value at which the screw is rotated in a metering process; said method further comprising the steps offirst rotating the screw at a first acceleration A1 until the rotation speed of the screw reaches a value N.sub.K, where N.sub.K <N;second rotating the screw at a second acceleration A2 until the rotation speed of the screw reaches the rotation speed N, second acceleration A2 being higher than first acceleration A1, the value N.sub.K being defined at a predetermined certain ratio K relative to said rotation speed N.