Nozzle gate opening and closing timing adjusting mechanism...

Details Nozzle gate opening and closing timing adjusting mechanism... Nozzle gate opening and closing timing adjusting mechanism...

2008-04-22

2010-06-01

Heitbrink, Tim (Department: 1791)

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...

C425S566000

Reexamination Certificate

active

07726965

ABSTRACT:
The object of the present invention is to provide a nozzle gate opening and closing timing adjusting mechanism used for multiple gate injection molding machine. And, a mechanism of the present invention is characterized that a nozzle gate opening and closing timing adjusting mechanism for use in a multiple gate injection molding machine having a plurality of resin injecting nozzles, each having disposed therein a gate pin that opens and closes a nozzle gate, the nozzle gates being opened by the gate pins when, in filling with a resin, a resin pressure exceeds a predetermined value and the nozzle gates being closed by the gate pins when the resin pressure falls below a predetermined value, the nozzle gate opening and closing timing adjusting mechanism comprising: timing pins, disposed at all or a portion of surfaces of an injection mold opposing the respective nozzle gates and advancing and retracting toward and from the nozzle gates; and opening and closing timings of the plurality of nozzle gates being adjusted by the nozzle gates being opened and closed by the timing pins directly or indirectly via the gate pins.

REFERENCES:
patent: 4285661 (1981-08-01), Yotsutsuji et al.
patent: 5470219 (1995-11-01), Yokoyama et al.
patent: 5846466 (1998-12-01), Abe et al.
patent: 5996618 (1999-12-01), Saito
patent: 6824379 (2004-11-01), Doyle et al.
patent: 7326048 (2008-02-01), Saito et al.
patent: 05-237879 (1993-09-01), None
patent: 2004-017564 (2004-01-01), None
patent: 2004-050425 (2004-02-01), None

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