To provide a preplasticization injection molding machine which prevents overshooting when the temperature of a plasticating cylinder equipped with a high output heater is maintained by using the heater in order to curtail a preparation time on starting.
The preplasticization injection molding machine has a plastication part 1 equipped with the plasticating cylinder 11 and a plasticating screw 12, an injection part 2 which retains a molten resin 7 supplied from the plasticating cylinder 11 in an injection cylinder 21 and injects/packs the retained molten resin 7 in a mold 3 by an injection plunger 22, and a mold clamping device 4 for clamping the mold 3. A temperature raising heater 16a for raising temperature on starting and a temperature maintaining heater 16b for maintaining temperature are fitted separately to the plasticating cylinder 11.
SUGITA TOSHIO
UEMOTO SEIICHI
Atsuo Mori