Metal fusion bonding – Process – With shaping
Patent
1985-10-28
1987-06-16
Jordan, M.
Metal fusion bonding
Process
With shaping
228219, H01B 1306
Patent
active
046731210
ABSTRACT:
A method for continuously producing a powder-filled tubular welding electrode, whereby a metallic band while being fed is formed to a gutter (16) and thereupon to a tube (21), whereby the edges of the gutter are welded together and welding powder is supplied via a conduit (18, 19) to the welded tube, and the welding powder free space of the tube being filled with a protective gas. The object of the invention is to provide a method for continuous production of a tubular welding electrode, especially a tubular welding electrode for welding without external supply of protective gas. The invention is characterized by the fact that the welding powder is introduced in a container (11), which is evacuated of an essential portion of its air content, whereupon the protective gas is introduced into the container until a positive pressure has been reached therein, and the powder-protective gas-mixture thereupon being supplied to the tube (21), whereby in the conduit (18, 19) is maintained a gas pressure, which is somewhat higher than the atmospheric pressure.
REFERENCES:
patent: 3333754 (1967-08-01), Catalano et al.
patent: 4269639 (1981-05-01), Lewis
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