Thermal spray systems

Details Thermal spray systems Thermal spray systems

1996-03-29

1999-08-03

Beck, Shrive

Coating processes

Spray coating utilizing flame or plasma heat

427449, 118308, 118313, 219 7614, 219 7616, 239 80, 239 81, B05D 108, B23K 900

Patent

active

059322934

ABSTRACT:
A thermal spray system includes a combustion unit connected to at least one port for supplying a flow of a combustible fluid from an external source of fuel and oxidant. The combustion unit includes a permeable burner block constructed to receive said combustible fluid from and to generate a high-energy stream of gas. The thermal spray system also includes an exhaust nozzle constructed to direct the high-energy stream of gas toward a substrate, and a material delivery unit constructed to deliver a material into the high-energy stream of gas to form a highly energized stream of particles. When the thermal spray system is used for bead blasting, the provided material is an abrasive material. Alternatively, when the thermal spray system is used for coating a substrate, the provided material is a coating material. The material delivery unit may be an injector or an electric arc unit. Instead of the combustion unit burning the combustible fluid, the thermal spray system may include a source of a high-pressure preheated gas such as a plasma source or an electric heat exchange source.

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