Process for putting a lip on a thick-walled tube of flexible mat

Details Process for putting a lip on a thick-walled tube of flexible mat Process for putting a lip on a thick-walled tube of flexible mat

1980-09-05

1982-04-13

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264296, 264320, 425392, 425393, 425DIG218, B28B 146

Patent

active

043247555

ABSTRACT:
A process and apparatus for putting a lip on a thick-walled tube of flexible material such as polyethylene comprises a cold rolling of the thick-walled tube with as little friction as possible on the wall of the tube. This is effected by vertically mounted rollers where the axis thereof is in substantial alignment with the axis of the tube being flared. At least one of the mandrels is rotated, and at least one of the mandrels is mounted for vertical movement and for putting pressure upon the wall of the tube during the rolling.

REFERENCES:
patent: 3089187 (1963-05-01), Wolfe
patent: 3991150 (1976-11-01), De Putter

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