| 摘要 |
PURPOSE:To decide whether a molded product is acceptable by a method wherein a molten resin temperature in a molding cycle is detected continuously by the position of a screw or a plunger during filling process and a pressure keeping time during pressure keeping process, in order to compare a difference between a corresponding value on a reference temperature curve. CONSTITUTION:In an injection molding machine 11, an operation and comparison unit 8 compares a temperature (a), detected one of temperature sensors attached to a cylinder head 12, a nozzle 13 and the cavity 14 of a mold, with the preset temperature curve (c) in the case of molding a good product to monitor whether the temperature is within a preset allowable value DELTAT or not by the position (s) of the screw 17 during filling process and the pressure keeping time (t) during the pressure keeping process. The result of comparison can be fed back to the heating control unit 19 of the molding machine or outputted as the signals 20, 21 or the like which indicates the quality 24 of the product, operating or stopping 20 of the molding machine or the alarm 21. The result may also be outputted to a CRT 22 or a printer 23. |
