DWELL PROCESS CONTROL DEVICE OF INJECTION MOLDING MACHINE

摘要

PURPOSE:To enable precise control, by a method wherein integral values of deviation between measured values and the optimum values of resin pressure and temperatures in a dwell process are calculated and converted into the corrected quantity of a manipulated valuable of a control system by a simple function to be decided by an experiential law. CONSTITUTION:Measured values of resin pressure P and resin temperature T within a mold are applied respectively to a P deviation integrating part 14 and T deviation integrating part 15. A target state locus memory part 16 applies information of a curve in a target state corresponding to the same to the operating parts 14, 15. An integral value Ep of a deflection between a target value Po and measured value Pr and an integral value Et of a deflection between a target value To and measured value Tr are operated respectively by the operating parts 14, 15. A function operating part 19 operates a simple function based on the integral values Ep, Et information through a molding condition input part 17 and an experiential law of an expert. A manipulative and corrective quantity operating part 20 converts the control quantities in a control system into corrected quantities DELTAPr, DELTATr based on the operation. A manipulated variable operating part 21 operates the manipulated variables corresponding to a mold temperature control device, cylinder temperature control device and servovalve based on those input values. The title dwell process is constituted so that it can be controlled along a curve in a target state representing the optimum value.