| 摘要 |
PURPOSE:To rapidly bring an injection molding machine close to a target temperature and eliminate the overshoot and undershoot phenomena by a method wherein the conditions of the injection molding machine and the temperature of a temperature control part are detected, a temperature deviation between the detected temperature and a target temperature and current and previous temperature deviation change rates are computed, a fuzzy inference is effected based on each membership function and the output value of heating and/or cooling means is computed. CONSTITUTION:The current conditions in which an injection molding machine I is placed and a signal from a temperature detecting sensor 5 of an injection cylinder 1 are sent into MPU 9, a temperature deviation between a target temperature and the detected temperature is computed by an arithmetic and logical unit(ALU) 11 and stored in a memory 13. Also, it computes the deviation change rate between the current and previous temperature in the memory 13. The conditions of the injection cylinder 1, the temperature deviation and the temperature deviation change rate become input values when the membership function and rule stored in the memory 13 are read in MPU 9 to effect fuzzy inference. Based on the fuzzy inference, the output value of a heater 7 is computed by ALU 11 and its result is sent from MPU 9 to the heater 7 as an output signal.
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