Powder flame spraying apparatus and method

Details Powder flame spraying apparatus and method Powder flame spraying apparatus and method

1981-11-02

1983-10-25

Beck, Shrive P.

Coating processes

With pretreatment of the base

Heating or drying pretreatment

427423, 406127, 406144, 239 85, 239654, 239 79, 118 72, 118 47, 118308, B05D 108

Patent

active

044119356

ABSTRACT:
There is provided an improved powder flame spraying apparatus and method having a preheating nozzle in advance of a plurality of final heating nozzles into the converging flame envelopes of the latter of which hardfacing powder is dispensed. This powder is aspirated into a pressurized stream of inert gas at a variable rate readily adjusted between maximum and no-flow by selectively regulating the gas pressure at and/or spaced downstream from the outlet of the powder aspirator. Regulation of the gas pressure is achieved by venting variable quantities of gas to the atmosphere or air to the aspirator outlet as appropriate to provide a desired powder flow and to achieve a desired volume and velocity of gas and powder delivery into the final heating flames.

REFERENCES:
patent: 2108998 (1938-02-01), Schori
patent: 2232328 (1941-02-01), Klopstock et al.
patent: 3345111 (1967-10-01), Bies et al.
patent: 3404838 (1968-10-01), Hawk
patent: 3504945 (1970-04-01), Leibundgut et al.
patent: 3986668 (1976-10-01), Huhne
patent: 4160048 (1979-07-01), Jaeger
patent: 4317540 (1982-03-01), Simm

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