Process for welding thermoplastic materials with projection of h

Details Process for welding thermoplastic materials with projection of h Process for welding thermoplastic materials with projection of h

1992-06-18

1994-03-29

Paschall, Mark H.

Electric heating

Metal heating

By arc

21912145, 21912159, 15624414, 1563046, B23K 1000

Patent

active

052987132

ABSTRACT:
The process of welding at least two elements of thermoplastic materials includes the step of heating, for projection on the welding area, a flow of projection gas comprising at least 20% helium, the balance consisting of a neutral gas or a mixture of neutral gases. For welding applications with a welding strand, the projection gas is heated at a temperature between 200.degree. and 350.degree. C. For applications involving the production of filamentary windings, the projection gas is heated at a temperature higher than 1000.degree. C.

REFERENCES:
patent: 2220545 (1940-11-01), Reinhardt
patent: 2423237 (1947-07-01), Haslacher
patent: 2786511 (1957-03-01), Reid
patent: 3397815 (1968-08-01), Tench et al.
patent: 3839126 (1974-10-01), Haller
patent: 4184904 (1980-01-01), Gaffney
patent: 5108780 (1992-04-01), Pitt et al.
Patent Abstracts of Japan, vol. 9, No. 29, 59-175315, "Method of Uniting Fiber Reinforced Resin Material", Oct. 2, 1984.

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