Coating processes – Spray coating utilizing flame or plasma heat – Continuous feed solid coating material
Patent
1998-03-26
1999-07-13
Bareford, Katherine A.
Coating processes
Spray coating utilizing flame or plasma heat
Continuous feed solid coating material
427456, 427233, 427236, C23C 412
Patent
active
059224126
ABSTRACT:
A method of eliminating unevenness in pass-reversal thermal spraying of a substrate surface by: uniformly thermally spraying a substrate surface by moving a wire fed arc spray gun along the length of the substrate surface at constant spray parameters while using a first wire feed rate and a first current level for the gun's power supply; (b) when said spray gun approaches an end zone of the pass length requiring reversal of spray gun movement, reducing the wire feed rate and current by up to about 25% until the spray gun has completed such reversal and has exited from said end zone in the opposite direction; (c) while still continuing thermal spraying, restoring the wire feed rage and current to said first levels; and (d) repeating steps (b) and (c) as the spray gun approaches other or repeated end zones of the substrate length during repeated passes.
REFERENCES:
patent: 2754227 (1956-07-01), Ransburg
patent: 4664587 (1987-05-01), Case, Jr. et al.
patent: 5514422 (1996-05-01), McCune
patent: 5691004 (1997-11-01), Palazzolo et al.
patent: 5723187 (1998-03-01), Popoola et al.
Baughman James Richard
Cook David James
Bareford Katherine A.
Ford Global Technologies Inc.
Malleck Joseph W.
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