Fluid sprinkling – spraying – and diffusing – Processes – Including mixing or combining with air – gas or steam
Patent
1988-05-11
1989-09-12
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Processes
Including mixing or combining with air, gas or steam
21912148, 239 13, 239 85, 239290, 239390, 239414, 2394164, B05B 124
Patent
active
048652520
ABSTRACT:
A method of and apparatus for producing a dense and tenacious coating with a thermal spray gun including a nozzle member and a gas cap. The gas cap extends from the nozzle and has an inwardly facing cylindrical wall defining a combustion chamber with an open end and an opposite end bounded by the nozzle. An annular flow of a combustible mixture is injected at a pressure of at least two bar above atmospheric pressure from the nozzle coaxially into the combustion chamber. An annular outer flow of pressurized air is injected from the nozzle adjacent to the cylindrical wall. Heat fusible powder entrained in a carrier gas is fed axially from the nozzle into the combustion chamber. An annular inner flow of pressurized air is injected from the nozzle into the combustion chamber coaxially between the combustible mixture and the powder-carrier gas. Upon combusting the annular mixture a supersonic spray stream containing the powder is propelled through the open end to produce a coating. A second gas cap with a different size open end may be selected to effect a different size spray stream.
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Hacker Martin E.
Maidhof William H.
Rotolico Anthony J.
Saia Lawrence A.
Forman Michael J.
Grimes E. T.
Ingham H. S.
Kashnikow Andres
The Perkin-Elmer Corporation
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