| 摘要 |
A temperature control method for an injection molding machine, which constantly performs stable temperature control irrespective of the heat capacity of objects. The temperature of individual objects, such as a heating zone of an injection cylinder, an injection nozzle, a die, etc., are detected by temperature sensors G1 to Gn. A servo CPU (24) executes temperature feedback control so that the detected temperature coincides with a set temperature, and a current command value is determined. Furthermore, actual currents flowing through heaters H1 to Hn are detected, and currrent feedback control is executed so that the actual current coincides with the current command value obtained by temperature feedback control. In comparison with ON/OFF control, fluctuation of the currents flowing through the heaters H1 to Hn fluctuation of the temperatures of the temperature control objects become smaller, and temperature control can be made more stably.
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