Coating processes – Spray coating utilizing flame or plasma heat
Patent
1993-12-09
1995-10-10
Beck, Shrive
Coating processes
Spray coating utilizing flame or plasma heat
427456, 118302, 118326, 239 79, B05D 108, B05B 1512
Patent
active
054569516
ABSTRACT:
A method for applying a thermal spray coating onto a substrate (24) includes the steps of providing chamber apparatus (10) including a chamber (16) having a gas flow assembly (23) that includes a gas injector (27) and a spray nozzle (30) therein for introducing, a gas and spray coating. The chamber has an adjustably sized restricted opening (18) that is continuously open to the ambient atmosphere (21) that is exterior of the chamber (16). The total gas flow is maintained from the gas flow assembly (23) at a predetermined rate based on the size of the restricted opening (18) and the amount of oxygen that is desired to be present during the spraying of the coating and thereafter until the spray coating solidifies on the substrate. Gas flow from the spray nozzle (30) is determined by optimum process parameters for coating specified materials. If the gas flow from the nozzle (30) is insufficient to provide the total gas flow, the gas injector (27) supplements the total gas flow.
REFERENCES:
patent: 3010009 (1961-11-01), Ducati
patent: 4082868 (1978-04-01), Schnedler et al.
patent: 4330574 (1982-05-01), Pierson et al.
patent: 5389407 (1995-02-01), Sokol
Bareford Katherine A.
Beck Shrive
Sermatech International Inc.
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