Solid phase deformation of thermoplastic tubes

Details Solid phase deformation of thermoplastic tubes Solid phase deformation of thermoplastic tubes

1986-07-15

1989-01-31

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Reshaping running or indefinite-length work

264292, 425393, B29C 5530

Patent

active

048014192

ABSTRACT:
A process for the deformation of a hollow workpiece comprising orientable, thermoplastic polymer by passage in the solid phase through a die having both an entry side and an exit side, which process comprises providing the hollow workpiece at the entry side of the die; applying to the hollow workpiece from the exit side of the die a tension insufficient to cause tensile failure of the workpiece but sufficient to deform the hollow workpiece by drawing it with reduction in its bulk cross-sectional area in the solid phase simultaneously through the die and over an internally positioned former having a cross-sectional area greater than the initial internal cross-sectional area of the hollow workpiece; and collecting the deformed hollow workpiece from the exit side of the die.

REFERENCES:
patent: 2249004 (1941-07-01), Kahn et al.
patent: 2863174 (1958-12-01), Schuman et al.
patent: 3089187 (1963-05-01), Wolfe
patent: 3356108 (1967-12-01), Johnston
patent: 3364294 (1968-01-01), Garibian et al.
patent: 4238538 (1980-12-01), Manwiller
patent: 4250138 (1981-02-01), Okita
patent: 4282277 (1981-08-01), Austen et al.
patent: 4482516 (1984-11-01), Bowman et al.

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