Process for manufacturing thermoplastic resin moldings

Details Process for manufacturing thermoplastic resin moldings Process for manufacturing thermoplastic resin moldings

B - Operations, Transporting

29

C

B29C 45/00 (2006.01) B29C 45/13 (2006.01) B29C 45/56 (2006.01) B29C 45/80 (2006.01) B29C 70/78 (2006.01) B29C 45/14 (2006.01)

Patent

CA 2157328

A process is described for manufacturing thermoplastic resin, moldings in a short molding cycle but with good appearance, nearly free from resin warp and deformations and free from weld-lines on the surface. The process uses a mold assembly comprising a pair of male and female molds, either of which has two or more freely opening and closing resin feeding gates open to the cavity surface. Also, there is a mechanism for controlling the quantity of resin to be fed from each gate and the timing of the initiation of resin feeding.

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