B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 45/00 (2006.01) B29C 45/17 (2006.01) B29C 45/18 (2006.01)
Patent
CA 2110170
2110170 9222411 PCTABS00018 A method for injecting a viscous fluid, such as a thermoplastic, and a non-viscous fluid, such as a gas, into a mold cavity of a mold body includes providing a valve element (48) mounted for reciprocation in a nozzle body flow passage (28) to regulate a flow of viscous fluid through the nozzle body discharge end and into a mold cavity (166). The valve element includes a barrel (50) having a first end selectively engaging a portion of the nozzle body discharge end to prevent a flow of viscous fluid therepast and a second end. A bore (64) extends longitudinally through the barrel and a pin (80) is positioned in the barrel bore. The pin has a first end (82) located adjacent the barrel first end. The pin (80) is operatively secured to the barrel (50) so that the pin moves with the barrel as the barrel reciprocates. A non-viscous fluid flow passage (86) is defined between the pin and the barrel. A viscous fluid flows through the nozzle body flow passage (28) around the barrel and into a mold cavity. A non-viscous fluid flows through the non-viscous fluid flow passage (86) defined between the barrel and the pin and into the mold cavity (166).
Johnson Tom W.
Moldovanyi Jay F.
Bkp Gp
Nitrojection Corporation
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