Method for forming a flange on an end of a synthetic liner

Details Method for forming a flange on an end of a synthetic liner Method for forming a flange on an end of a synthetic liner

1993-11-09

1995-10-31

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

156294, 1563042, 1563096, 264231, 264248, 264269, 264270, B29C 5700, B29C 6334, B29C 6502

Patent

active

054627060

ABSTRACT:
A method is shown for forming a flange on an end of a plastic pipe liner of the type used to line a tubular member. A preformed synthetic disc is installed on the end of the synthetic liner which extends from the tubular member. The exposed end of synthetic liner is surrounded with a forming unit which includes a heating unit and an associated forming mandrel. The heating unit is extended to heat the junction between the preformed disc and exposed end of the liner to form a weld area between the two. The forming mandrel is then extended to compress the molten weld area between the liner and disc. The remaining exposed material is removed to form a finished surface coplanar with the face of the synthetic disc.

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Installation and Fabrication Manual, Dow Chemical Company, pp. 20-24, no date.
PCT Publication WO 89/0821 Sep. 8, 1989.

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