Injection molding nozzle seal

Details Injection molding nozzle seal Injection molding nozzle seal

B - Operations, Transporting

29

C

18/703

B29C 45/28 (2006.01)

Patent

CA 1136815

ABSTRACT OF THE DISCLOSURE This invention relates to a nozzle seal for valve- gated injection molding. The hollow seal is seated in the nozzle portion of the heater cast and extends across the insulative air gap and into a gate aperture in the cavity plate. The inner bore of the nozzle seal is tapered to form the gate which receives the tip end of the valve pin in the closed position. The nozzle seal is formed of a poor conductive metal such as titanium alloy which conducts sufficient heat to provide a clean closing gate without resulting in unacceptable heat loss to the surrounding cavity plate.

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