Injection molding valve gated system

Details Injection molding valve gated system Injection molding valve gated system

B - Operations, Transporting

29

C

18/703

B29C 45/74 (2006.01) B29C 45/28 (2006.01)

Patent

CA 1213706

ABSTRACT OF THE DISCLOSURE This invention relates to an improved valve gated injection molding system in which the heated nozzle has a nose portion which extends through a cylindrical opening in the cavity plate to the cavity. The valve gate extends through the nose portion and is tapered so that the forward face of the nose portion can be machined to a predetermined length to provide a gate of a particular size. This has the advantage of improving heat transfer to the gate area and reducing the accuracy required of the moldmaker in that both the valve pin and the matching seat in the gate are provided by the manufacturer. Furthermore, each size of nozzle can be adapted for several different gate sizes which reduces manufacturing and inventory costs.

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