Mineral insulated cable manufacture

Details Mineral insulated cable manufacture Mineral insulated cable manufacture

H - Electricity

01

B

26/129, 25/139

H01B 13/00 (2006.01) B23K 9/025 (2006.01) B23K 9/035 (2006.01) H01B 13/004 (2006.01)

Patent

CA 2040193

In the continuous manufacture of m.i. cable in which the sheathed tube is formed by welding the longitudinally extending edges of a transversely folded copper strip, a preformed body of a fluid-permeable ceramic or sintered heat-resistant material is disposed on the outer surface of the powder delivery tube radially inwardly of the advancing strip in the vicinity of the welding station. Argon or other inert gas fed into the fluid-permeable preformed body from at least one pipe is caused to flow radially outwardly through the preformed body to provide an environment of argon or other inert gas between the preformed body and the copper tube in the vicinity of the welding station.

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