Patent ID: 6811387
Filing Date: 2004-11-02
Classification: B29C

Abstract:
An electric injection molding machine comprising:an injection molding machine having a screw that can be moved in a cylinder; a pressure commanding means for generating a pressure command value applied to the screw; a pressure sensing means for sensing a pressure applied to the screw; a pressure deviating means for calculating a deviation value between the pressure command value of the pressure commanding means and a sensed value of the pressure sensing means; a storing means for employing a pressure value of the pressure sensing means as address information to respond the address, and storing a gain reference value based on a relationship between a pressure and a volume of the cylinder; a multiplying means for multiplying the gain reference value read from the storing means and the deviation value of the pressure deviating means; an amplifying means for amplifying an output of the multiplying means; and a servo motor driven based on an output value of the amplifying means to move the screw.