Device and method for forming an annular raised rib on a tubular

Details Device and method for forming an annular raised rib on a tubular Device and method for forming an annular raised rib on a tubular

1978-01-16

1980-07-29

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, 264322, B29C 1700

Patent

active

042150876

ABSTRACT:
A device and method for forming an annular raised rib on a tubular member includes a mandrel having a primary portion which has a secondary portion slidably mounted on the outer end thereof. The inner end of the primary mandrel carried by a base. An expandle ring is carried by the secondary mandrel and the outer end of the primary mandrel. Further included is a movable die with means for moving the die to and upon the primary mandrel. The secondary mandrel is formed with an annular frusto-conical ramp for expanding the ring radially outwardly thereof which forces the wall of the tubular member outwardly thereby forming an annular raised rib on a tube of plastic mounted on the mandrels when the secondary mandrel is moved to and upon the primary mandrel.

REFERENCES:
patent: 3998578 (1976-12-01), Acda

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