| 摘要 |
The bi-functional transfer foot (10) is structurally configured and operative to provide automated handling of preimpregnated composite materials. The transfer foot (10) includes a valve member (30) having a knock-off stem (34) movably mounted in a housing (15), a solenoid valve (44) and fluid line (40) interconnection to vacuum and pressure sources, and a control subsystem (50) for regulating the operation of the transfer foot (10). The transfer foot (10) is bi-functional for "ON" and "OFF" operation. A control signal issued by the control subsystem (50) turns the transfer foot (10) "ON" wherein vacuum forces causes a first displacement of the valve member (30) within the housing (15) 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 (44) to exert biasing forces to return the transfer foot (10) to the "OFF" state wherein the transfer foot (10) utilizes forces to cause a second displacement of the valve member (30) within the housing (15) that provides a mechanical force via the knock-off stem (34) to disengage and release the tacky surface of preimpregnated composite plies. A multiplicity of bi-functional transfer feet (10) may be arranged in an array to define automated material handling apparatus for preimpregnated composite plies. Individual transfer feet (10) may be automatically, selectively, activated to form predetermined combinations to match the wide variety of sizes and shapes or patterns of preimpregnated composite materials pre-cure processed via automated composite material manufacturing systems. <IMAGE> |
