Method for welding together pipes consisting of thermoplastic pl

Details Method for welding together pipes consisting of thermoplastic pl Method for welding together pipes consisting of thermoplastic pl

1992-08-26

1994-06-14

Ball, Michael W.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

1562739, 156293, 1563042, 285 21, 285903, B29C 6522

Patent

active

053206975

ABSTRACT:
For welding composite pipes together a welding ring is used, which bears against the side wall portions of elevations. It consists of thermoplastic material and is provided with an electric resistance heating. Prior to welding there is an annular gap between the front walls of the pipes to which annular gap a volume compensating groove is associated in the welding ring. A connection of the pipes in their region outside of their inner pipe is performed by an at least partial welding of the welding ring, the front walls bearing against each other in unwelded manner.

REFERENCES:
patent: 3677676 (1972-07-01), Hegler
patent: 4141576 (1979-02-01), Lupke et al.
patent: 4202568 (1980-05-01), Strom
patent: 4869533 (1989-09-01), Lehmann et al.
patent: 5053097 (1991-10-01), Johansson et al.
patent: 5163717 (1992-11-01), Wise

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