Method and apparatus of producing hollow profiles from multilaye

Details Method and apparatus of producing hollow profiles from multilaye Method and apparatus of producing hollow profiles from multilaye

1992-03-25

1993-07-20

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Of varying cross-sectional area or with intermittent...

26 85, 72 58, 72180, 72208, 72226, 264280, 264324, 264103, 264DIG73, 425 3, 425335, 425403, B29C 5508, D06F 2900

Patent

active

052290557

ABSTRACT:
Hollow profile elements are formed by shaping a starting workpiece that consists of multiple layers of a material having a large width-to-thickness ratio, e.g., woven fabrics or laid materials. The layers are joined by seams to define elongated pockets or channels. Shaping tools are inserted into these channels to form the profile elements with a desired cross sectional shape, which can be constant or varied. The shaping tools employ one or more endless belts that extend in closed loops around guide rollers; the belts are driven so that during the shaping process sliding friction is substantially eliminated between the material of the workpiece and the respective shaping tool.

REFERENCES:
patent: 2294642 (1942-09-01), Wedler
patent: 3175272 (1965-03-01), Cohn et al.
patent: 3201827 (1965-08-01), Reynolds
patent: 3378428 (1968-04-01), Boggs
patent: 3860368 (1975-01-01), Kerttula et al.
patent: 4628712 (1986-12-01), Strudel
patent: 4799822 (1989-01-01), Wintermantel et al.

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