Injection molding system having dual feed bushing seated in...

Details Injection molding system having dual feed bushing seated in... Injection molding system having dual feed bushing seated in...

B - Operations, Transporting

29

C

18/711

B29C 45/28 (2006.01)

Patent

CA 1278409

ABSTRACT OF THE DISCLOSURE A multi-cavity valve gated injection molding system having an elongated manifold through which a melt passage to a number of heated nozzles. A separate valve member bushing is seated in an opening through the manifold in alignment with each nozzle. The bushing is in bearing contact between the back plate and the rear face of each nozzle. The bushing has a melt duct with two smoothly curved arms which connect between the melt passage in the manifold and the melt passage around the valve member. The bushing provides a seal around the reciprocating valve member and has an outer flange which forms a combination insulative air space and containment chamber for melt which does escape.

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