B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 45/00 (2006.01) B29C 45/17 (2006.01) B29C 45/76 (2006.01)
Patent
CA 2103023
A method and system for the injection molding of plastic articles in an injection molding system including a chamber (18) in a mold of the system which stores a charge of pressurized gas immediately prior to use. The mold has an injection aperture and a mold cavity for receiving molten resin. A resin flow path (14) fluidly communicates the injection aperture and the mold cavity within the mold. An orifice (20) in the mold opens the chamber (18) to the mold. A gas receiver (10) initially stores the charge of pressurized gas and a fluid circuit selectively introduces the charge of pressurized fluid into the chamber (18). A valve mechanism (24) in the chamber (18) selectively fluidly communicates the chamber (18) to the flow path (14) under control of a controller (28). When communicated to the flow path (14), the charge of gas distributes the molten plastic within the mold cavity in one embodi- ment of the invention.
Melea Limited
Smart & Biggar
LandOfFree
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