Injection molding system having manifold with side mounted...

Details Injection molding system having manifold with side mounted... Injection molding system having manifold with side mounted...

B - Operations, Transporting

29

C

18/703

B29C 45/00 (2006.01) B23P 15/00 (2006.01) B29C 45/27 (2006.01) B29C 45/28 (2006.01) B29C 45/30 (2006.01)

Patent

CA 1265907

ABSTRACT OF THE DISCLOSURE This invention relates to an injection molding system having a number of nozzles conveying melt from an elongated manifold to a common cavity. In the preferred embodiment, each heated nozzle has a melt channel which is offset from a central valve pin bore for conveying the melt to the gate. The melt channel extends through a side portion of the nozzle which is bolted to the side surface of the manifold. The bolts provide a seal against leakage of the pressurized melt, while at the same time allow slight lateral movement between the manifold and the nozzle. This provides for thermal expansion of the manifold relative to the nozzle which is accurately located in a well in the core. The system is used for large cavities which require large flow volumes and avoids the difficulty of accurate machining of the large molds to provide sealing.

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