| 摘要 |
PURPOSE:To manufacture the molded form of high quality by a method wherein the temperature change of a specified place in the screw of an injection molding machine as well as the revolving number of the screw are measured to regulated the back pressure or the revolving number of said screw by the values of the measurement and keep the temperature of molten resin constant at all times. CONSTITUTION:In order to control the temperature of molten resin upon plastization, a plurality of thermocouples 21, embedded along the groove of a screw, and a screw revolution detector 24 detect the temperature of the molten resin and the revolving number of the screw. Differences between the detected temperature of the resin as well as the revolving number of the screw and the preset values thereof are calculated and the calculated values are inputted into a plasticization controller 29. A hydraulic cylinder 7 and a hydraulic motor 4 are controlled by operating a proportional flow amount valve 8 and a proportional pressure valve 10 by the commands A, B of the plasticization controller 29, whereby the temperature of the molten resin in the screw is kept constant.
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