Parison ejector for an injection molding apparatus

Details Parison ejector for an injection molding apparatus Parison ejector for an injection molding apparatus

1981-05-15

1983-11-01

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With preform severing means movable relative to mold

264334, 425525, 425533, 425537, 425556, A23P 100

Patent

active

044128061

ABSTRACT:
A parison ejector is used in combination with an injection molding apparatus of the type for molding parisons having an injector portion including a plurality of mold cavities communicating with a source of molten plastic material, an ejector portion for engaging the injector portion which includes a movable platen, a plurality of cores shaped and positioned to matingly engage the mold cavities, and an ejector frame which is carried by the movable platen and supports the cores. The parison ejector includes a hydraulic ram which actuates an ejector carriage which carries a pair of jaws pivotally mounted on the carriage and having mating ends which meet to form bearing surfaces which receive cams mounted in the ejector frame. The ends of the jaws form a portion of the mold and the parison is partly formed within it. Reciprocal movement of the ejector carriage with respect to the ejector frame causes the bearing race to move relative to the stationary cam thereby forcing the jaws apart so that the molded parison is removed from the end of the core. The cores preferably are hollow and include a helical pathway for a coolant to flow therethrough.

REFERENCES:
patent: Re25290 (1962-12-01), Parafrey
patent: 1243318 (1917-10-01), McLaren
patent: 1916798 (1933-07-01), Hottel
patent: 1919534 (1933-07-01), Shaw
patent: 2330762 (1943-09-01), Tooker
patent: 2366475 (1945-01-01), Bartholomew
patent: 2940120 (1980-06-01), Grebowiec
patent: 3865529 (1975-02-01), Guzzo
patent: 4133627 (1979-01-01), Kontz
patent: 4181698 (1980-01-01), Hayes et al.
patent: 4197073 (1980-04-01), Rees et al.
patent: 4209290 (1980-06-01), Rees et al.

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