Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means between charger and mold to cut off flow of...
Patent
1980-07-28
1981-09-01
Pavelko, Thomas P.
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With means between charger and mold to cut off flow of...
B29F 103, B29F 105
Patent
active
042869412
ABSTRACT:
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.
REFERENCES:
patent: 4043740 (1977-08-01), Gellert
patent: 4212627 (1980-07-01), Gellert
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