Bi-functional transfer foot

Details Bi-functional transfer foot Bi-functional transfer foot

1991-04-30

1993-02-02

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

Female mold type means

271108, 294 641, 425397, 4254031, B29C 3100, B65H 500

Patent

active

051836700

ABSTRACT:
A bi-functional transfer foot that is structurally configured and operative to provide automated handling of preimpregnated composite materials. The transfer foot includes a valve member having a knock-off stem movably mounted in a housing, a solenoid valve and fluid line interconnection to vacuum and pressure sources, and a control subsystem for regulating the operation of the transfer foot. The transfer foot is bi-functional for "ON" and "OFF" operation. A control signal issued by the control subsystem turns the transfer foot "ON" wherein vacuum forces causes a first displacement of the valve member within the housing to provide a vacuum force for engaging and retaining the tacky surface of preimpregnated composite plies. Termination of the control signal causes the solenoid valve to exert biasing forces to return the transfer foot to the "OFF" state wherein the transfer foot utilizes pressure forces to cause a second displacement of the valve member within the housing that provides a mechanical force via the knock-off stem to disengage and release the tacky surface of preimpregnated composite plies. Individual transfer feet may be automatically, selectively, activated to form predetermined combinations to match the wide variety of sizes and shapes or patterns of preimpregnated composite materials that may be pre-cure processed via automated composite material manufacturing systems.

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patent: 4852247 (1989-08-01), Hawkswell
patent: 4994240 (1991-02-01), Hayashi

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