Nozzle and apparatus for injection molding

Details Nozzle and apparatus for injection molding Nozzle and apparatus for injection molding

2007-05-22

2007-05-22

Gupta, Yogendra N. (Department: 1722)

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...

C425S562000, C425S566000

Reexamination Certificate

active

11007756

ABSTRACT:
A nozzle for controlling flow of melt in a mold assembly comprises a valve pin guide interposed between a nozzle inlet and nozzle outlet, a valve pin movably supported thereby, and a contact arm engaging the valve pin and transverse to and passing through the valve pin guide. Biasing means acting on the contact arm hold the valve pin in a position preventing flow of melt. As the mold assembly closes, forces exerted on the contact arm overcome the biasing means and allow the valve pin to move to a position permitting flow of melt. Relief of pressure of retained melt is effected when force therefrom exerted on the valve pin exceeds an adjustable pre-load of the biasing means. The nozzle advantageously comprises an inlet bushing movably supported by the nozzle body enabling adjustment of the overall length of the nozzle to accommodate a range of spacing of elements of the mold assembly.

REFERENCES:
patent: 3295169 (1967-01-01), Moslo
patent: 3719310 (1973-03-01), Hunten
patent: 3934626 (1976-01-01), Hall
patent: 3941540 (1976-03-01), Driscoll et al.
patent: 4073469 (1978-02-01), Kodric
patent: 4076485 (1978-02-01), Sokolow
patent: 4082226 (1978-04-01), Appleman et al.
patent: 4212626 (1980-07-01), Gellert
patent: 4333608 (1982-06-01), Hendry
patent: 4427361 (1984-01-01), Saito
patent: 4678427 (1987-07-01), Fritzsche
patent: 4822269 (1989-04-01), Kamiyama et al.
patent: 5012839 (1991-05-01), Rogers et al.
patent: 5225217 (1993-07-01), Wisen et al.
patent: 5229145 (1993-07-01), Brown et al.
patent: 5380188 (1995-01-01), Ullisperger
patent: 6348171 (2002-02-01), Dewar et al.
patent: 6409955 (2002-06-01), Schmitt et al.
patent: 6575731 (2003-06-01), Olaru et al.
patent: 6733274 (2004-05-01), Seta et al.
patent: 2002/0140132 (2002-10-01), Seta et al.
patent: 2004/0131722 (2004-07-01), Dufner
patent: 1540698 (1979-02-01), None
patent: 60149425 (1985-08-01), None
International Search Report and Written Opinion of the Searching Authority in PCT/US2005/013656 (mailed Aug. 16, 2005).

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