Method for production of a hollow body

Details Method for production of a hollow body Method for production of a hollow body

1989-05-26

1990-11-06

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Applying tensile stress to workpiece during heat curing

264257, 264310, B29C 6100, B29C 6900

Patent

active

049684728

ABSTRACT:
A method for forming a hollow body during which, for the purpose of impression of internal stresses, the body is subjected during its production to axial forces and moments. For this purpose the hollow body is supported from the inside by a mandrel constituted by disks which can move relative to one another and which, accordingly, do not obstruct axial expansion and twisting of the hollow body.

REFERENCES:
patent: 2828239 (1958-03-01), Fischer
patent: 3464879 (1969-09-01), Poulsen
patent: 3979250 (1976-09-01), Drostholm

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