Plastic article or earthenware shaping or treating: apparatus – Means feeding fluent stock from plural sources to common...
Patent
1998-04-14
2000-03-28
Davis, Robert
Plastic article or earthenware shaping or treating: apparatus
Means feeding fluent stock from plural sources to common...
264572, 425444, 425546, 425556, 425806, 425812, B29C 4542
Patent
active
060423552
ABSTRACT:
A mold for use in a gas-assisted injection molding system includes an ejector pin subsystem including a split pin which partially blocks the flow of molten plastic through a secondary runner, helps to eject solid plastic from the mold, and helps to define an article-defining cavity and the secondary runner in the mold. A first spill cavity is flow coupled by the secondary runner to the article-defining cavity. The split pin together with other ejector pins are mounted on an ejector plate to move therewith between extended and retracted positions. A second spill cavity is flow coupled by a tertiary runner to the first spill cavity if needed. The split pin, as well as the other ejector pins mounted on the ejector plate, eject plastic from the article-defining cavity, the spill cavities, and the secondary and tertiary runners in the extended position of the ejector plate.
REFERENCES:
patent: 4734027 (1988-03-01), Adams
patent: 4820149 (1989-04-01), Hatakeyama et al.
patent: 5090886 (1992-02-01), Jaroschek
patent: 5098637 (1992-03-01), Hendry
patent: 5423667 (1995-06-01), Jaroschek
patent: 5484278 (1996-01-01), Berdan
patent: 5607640 (1997-03-01), Hendry
Murphy John F.
Porter Randolph S.
Davis Robert
Winget Larry J.
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