TEMPERATURE CONTROL DEVICE OF INJECTION MOLDING MACHINE

摘要

A PID control system 10 is included to determine the deviation value e of a detection temperature PV and a set temperature SV, to perform PID control such that the deviation value e becomes zero and to output, to the corresponding heating portion 4 or cooling portion 5, only one of a heating operation amount yh which is generated by an I operation output, a D operation output, the deviation value e and a heating side proportional band to perform control on the heating portion 4 and a cooling operation amount yc which is generated by an I operation output, a D operation output, the deviation value e and a cooling side proportional band to perform control on the cooling portions 5, whichever amount is relatively larger.

主权项

1. A temperature control device of an injection molding machine that includes a molding controller which detects, with a temperature sensor, a heating temperature on a predetermined portion of a heating cylinder and which controls a heating portion that heats the predetermined portion and a cooling portion that cools the predetermined portion such that a detection temperature is equal to a preset set temperature, the temperature control device comprising:
a PID control system that determines a deviation value of the detection temperature and the set temperature, that performs PID control such that the deviation value becomes zero and that outputs, to the heating portion or the cooling portion corresponding thereto, only one of a heating operation amount which is generated by an I operation output, a D operation output, the deviation value and a heating side proportional band to perform control on the heating portion and a cooling operation amount which is generated by an I operation output, a D operation output, the deviation value and a cooling side proportional band to perform control on the cooling portion. whichever amount is relatively larger.