Patent ID: 6840115

Claim:
A mold clamping control device for use in an injection molding machine having a screw for injecting molten resin into a mold, said mold clamping control device comprising: a first sensor detecting a relative position between a movable platen and a fixed platen to produce a detected platen position; a second sensor detecting a mold clamping force exerted on the mold clamped by the movable platen and the fixed platen to produce a detected mold clamping force; a target value generator generating a target value between the movable platen and the fixed platen as a target platen position value and generating a target mold clamping force value; and a mold clamping control unit for calculating a position deviation and a mold clamping deviation, the position deviation being a deviation between the target platen position value and the detected platen position, the mold clamping deviation being a deviation between the target mold clamping force value and the detected mold clamping force, said mold clamping control unit being configured to selectively control a mold clamping motor based upon one of the position deviation and the mold clamping deviation.