Fluid sprinkling – spraying – and diffusing – With means fusing solid spray material at discharge means – With supply holder for fusible material
Patent
1994-03-31
1996-05-28
Weldon, Kevin P.
Fluid sprinkling, spraying, and diffusing
With means fusing solid spray material at discharge means
With supply holder for fusible material
239135, 2394275, 427446, 427453, 427455, B05B 720
Patent
active
055203345
ABSTRACT:
A method and apparatus are provided for operating a small diameter thermal spray gun to thermal spray a coating onto a substrate. A liquid fuel and regeneratively heated air are swirled together within a mixing chamber, passed through a restricter plate orifice, and then passed into the combustion chamber to atomize the liquid fuel and mix the liquid fuel with the regeneratively heated air. The liquid fuel is then burned within a combustion chamber of a small diameter thermal spray gun to generate a high energy flow stream, into which a coating material is injected. The combustion chamber includes an inner sleeve with cooling ports which pass cooling air laterally therethrough. A flow nozzle directs the high energy flow stream towards the substrate. The flow nozzle transfers a heat flow from a first portion of the high energy flow stream to a second portion of the high energy flow stream, and provides a thermal barrier to retain heat within the high energy flow stream. The small diameter thermal spray gun may be tuned for operating with a wide variety of coating materials by replacing the combustion chamber inner sleeve and the flow nozzle thermal transfer member with alternative members.
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Handley Mark W.
Hill Kenneth C.
Weldon Kevin P.
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