Method of injection molding polyethylene terephthalate

Details Method of injection molding polyethylene terephthalate Method of injection molding polyethylene terephthalate

B - Operations, Transporting

29

C

B29C 45/63 (2006.01) B29C 45/00 (2006.01) B29C 45/60 (2006.01)

Patent

CA 2480523

A method of injecting molding polyethylene terephthalate is provided in which polyethylene terephthalate having irregular size and shape is forcedly fed from a material feeder by rotation of a feed screw therein into the rear portion of an injection cylinder having an injection screw to plasticate the polyethylene terephthalate, and the PET is injection molded into a required molded article. The material feed is performed by detecting the rotational torque of the injection screw in correspondence with the revolution speed of the feed screw during material feed and setting the revolution speed of the feed screw taking the flection point of the rotational torque as a guide.

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