Pipe belling process

Details Pipe belling process Pipe belling process

1998-04-22

2000-03-07

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264249, 264275, 264277, 425393, 425403, 425504, 425508, 425DIG218, B29C 5708, B29C 5136

Patent

active

06033617&

ABSTRACT:
An improved pipe belling process is shown which features a mandrel having spring loaded detents at one circumferential position on an outer working surface. A gasket is installed on the outer working surface in abutment with the exposed detents. The heated socket end of a thermoplastic pipe is forced over the mandrel exterior and over the gasket with the detents in an extended position. This action causes the heated socket end of the pipe to flow over the gasket and form a retention groove for retaining the gasket before again contacting the working surface of the mandrel. The heated end of the pipe is cooled and retracted from the working surface of the mandrel. The retraction step serves to force the spring loaded detents to the retracted position to allow travel of the thermoplastic pipe over the working surface of the mandrel with the gasket being retained within the formed groove.

REFERENCES:
patent: 4030872 (1977-06-01), Parmann
patent: 5928451 (1998-05-01), Johansson et al.
The Rieber Sealing System for PVC Pipes brochure.

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