Integral sliding member of a slide fastener and the molding devi

Details Integral sliding member of a slide fastener and the molding devi Integral sliding member of a slide fastener and the molding devi

1990-10-01

1991-12-17

Hoag, Willard

Plastic article or earthenware shaping or treating: apparatus

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

To make slide fastener element

164342, 249142, 264242, 425814, 425DIG34, B29C 4516, B29C 3344, B29C 4142

Patent

active

050731033

ABSTRACT:
A molding device for molding a sliding member of a slide fastener includes a first mold, a second mold movable toward or away from the first mold to close or open the molding device, at least one set of upper movable moving parts, a first upper stationary molding part detachably fixed to the first mold and a second upper stationary molding part detachably fixed to the second mold. The upper stationary molding parts are replaceable to alter the design of the holding end of a pulling tab of the slide fastener. Each set of the upper movable molding parts includes a first and a second upper movable molding part installed in the first mold, a third and a fourth upper movable molding part in the second mold. Each of the four upper movable molding parts is guided to move in a direction slanted with respect to the direction of relative movement between the first and second molds, whereby the four upper movable molding parts are moved away from one another after the molding is completed to facilitate the separation of the molded member from the molding device. Each of the four upper molding parts includes a pair of independent and chain-linking sub-cavities which, when all of the four upper movable moving parts are brought together, combine with all other sub-cavity pairs to form two independent but chain-linked cavities for molding a pair of independent but chain-linking ring-shaped portion and pulling ring for the sliding member.

REFERENCES:
patent: 2181142 (1939-11-01), Marinsky
patent: 2209413 (1940-07-01), Marinsky
patent: 2487359 (1949-11-01), Natzler
patent: 2495539 (1950-01-01), Natzler et al.
patent: 2519171 (1950-08-01), Bolton
patent: 2672662 (1954-03-01), Morin
patent: 2705345 (1955-04-01), Epple
patent: 2736062 (1956-02-01), Scheuermann et al.
patent: 4790973 (1988-12-01), Minami et al.
patent: 5013511 (1991-05-01), Akashi

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