Injection molding multiple nozzle valve gating system

Details Injection molding multiple nozzle valve gating system Injection molding multiple nozzle valve gating system

B - Operations, Transporting

29

C

18/682

B29C 45/22 (2006.01) B29C 45/28 (2006.01)

Patent

CA 1261569

ABSTRACT OF THE DISCLOSURE This invention relates to a multi-cavity injection molding system in which a number of nozzles are fixed to a common manifold, and valve gating is provided by actuating the manifold and the nozzles together. A pair of hydraulically actuated pistons are mounted to drive the manifold and nozzles between a retracted open position and a forward closed position. Each nozzle has a truncated tip on the forward end portion which seats in a gate in the closed position. Pressurized melt flows through a melt passage which branches in the manifold and extends through each nozzle to a melt receiving space around the forward end portion. A circumferential sealing and locating flange prevents the leakage of melt from this space as the nozzle reciprocates.

542182

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