Integral multi-material injection molding nozzle seal and tip

Details Integral multi-material injection molding nozzle seal and tip Integral multi-material injection molding nozzle seal and tip

B - Operations, Transporting

29

C

B29C 45/20 (2006.01) B29C 45/03 (2006.01) B29C 45/27 (2006.01) B29C 45/28 (2006.01)

Patent

CA 2332062

The present invention provides an integral multi-material injection molding nozzle seal and tip. The inner tip member, through which the melt duct extends; is formed of either a highly thermally conductive material or hard material while the surrounding outer sleeve member, which contacts the cooled mold to provide a seal around the gate, is formed of a substantially less conductive material to avoid undue heat loss. The tip member and sleeve member are integrally attached, preferably by brazing, at an interface between the two portions. The integral construction facilitates easier removal of the seal and tip, thereby promoting a longer service life.

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