Positive internal latch lock for an injection mold

Details Positive internal latch lock for an injection mold Positive internal latch lock for an injection mold

1994-09-09

1996-02-27

Mackey, James P.

Plastic article or earthenware shaping or treating: apparatus

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

With means to close mold

4254501, 4254519, 425595, B29C 4564

Patent

active

054944350

ABSTRACT:
A positive internal latch lock for an injection mold having outer, intermediate, and inner plates movable between open and closed mold positions. The latch lock includes a mechanism for securing the outer and intermediate plates at a predetermined spaced distance when the mold is opened at a first parting line between the outer and intermediate plates. Further, the latch lock provides a mechanism for locking the intermediate and inner plates together until the outer and intermediate plates are secured at the predetermined spaced distance. After the outer and intermediate plates are secured, the intermediate and inner plates are allowed to open at a second parting line.

REFERENCES:
patent: 3986805 (1976-10-01), Haines
patent: 4636167 (1987-01-01), Shibata
patent: 4671764 (1987-06-01), Hehl
patent: 4859170 (1989-08-01), Aoki
patent: 4881891 (1989-11-01), Luther
patent: 5198249 (1993-03-01), Westerkamp

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