Arc thermal spray gun extension with conical spray

Details Arc thermal spray gun extension with conical spray Arc thermal spray gun extension with conical spray

C - Chemistry, Metallurgy

23

C

C23C 4/06 (2006.01) B05B 7/22 (2006.01) B05B 13/06 (2006.01)

Patent

CA 2292240

In a two-wire arc spray extension two metal wires are guided into contact, and a gas cap is affixed to a gun body. The feeding wires receive an arc current to effect an arc and thereby molten metal at the wire tips. The gas cap has a plurality of orifices therein that receive pressurized gas to generate gas jets. The orifices are disposed with substantially equal spacing arcuately such that the jets are directed with a radially inward component toward the tips to effect atomization of the molten metal into a spray stream. The orifices have axes that are offset forwardly and tangentially from radial so as to create a vortex flow such that the spray stream is effected in the form of a conical fan. Insertion of the spray stream centrally into a hole can effect a coating circumferentially on an inside surface of the hole.

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