Patent ID: 9186634
Filing Date: 2015-11-17
Classification: B01F,B29B,B29C

Abstract:
1. A kneading apparatus for a thermoplastic resin, comprising: a plasticizing cylinder which has a high pressure kneading zone for kneading a molten resin obtained by plasticizing and melting the thermoplastic resin with a pressurized fluid, and a pressure reduction zone for discharging the gasified pressurized fluid from the molten resin kneaded with the pressurized fluid; a screw which is arranged rotatably and movably back and forth in the plasticizing cylinder; a downstream side seal mechanism which is provided between the high pressure kneading zone and the pressure reduction zone and which shuts off communication between the high pressure kneading zone and the pressure reduction zone; and a pressure reduction zone pressure adjusting mechanism which is connected to the pressure reduction zone of the plasticizing cylinder and which controls a pressure of the pressure reduction zone so that the pressure is not less than an atmospheric pressure and the pressure is not more than a maximum pressure of the high pressure kneading zone that is achieved when kneading the molten resin with the pressurized fluid, when the downstream side seal mechanism shuts off the communication between the high pressure kneading zone and the pressure reduction zone.