Method and apparatus for forming flanges on tubes

Details Method and apparatus for forming flanges on tubes Method and apparatus for forming flanges on tubes

1995-07-05

1998-10-27

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264296, 264327, 425384, 425393, B29C 5704

Patent

active

058274677

ABSTRACT:
Method and apparatus for forming flanges and tubes of partical crystalline thermoplastics. The thermoplastics may comprise cross-linked portions and preferably are polyethylene. A heated tube end (2) is upset in a die (10) by a plunger (30) so as to arch and form a pair of conical regions which become disk-shaped and are folded together to form the flange (8).

REFERENCES:
patent: 3584344 (1971-06-01), Bjalme
patent: 3843300 (1974-10-01), McFarlane
patent: 3929958 (1975-12-01), Parmann
patent: 4059379 (1977-11-01), Korff et al.
patent: 4113813 (1978-09-01), Wilson
patent: 4140739 (1979-02-01), Cotten
patent: 4156710 (1979-05-01), Carroll et al.
patent: 4406852 (1983-09-01), Riegel
patent: 4867929 (1989-09-01), Albrecht et al.
patent: 4907958 (1990-03-01), Jones
patent: 4975234 (1990-12-01), Parmann

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