Thermal spray method for producing glass mold plungers

Coating processes – Solid particles or fibers applied – Uniting particles to form continuous coating with...

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427 57, 427191, 427289, 427367, 4273766, 4273767, 427380, 4273835, 4273977, 427423, B05D 302, B05D 312

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active

050063219

ABSTRACT:
Manufacture of glass mold plungers utilizes a thermal spray gun having combustion chamber with an open channel for propelling combustion products into the ambient atmosphere at supersonic velocity. The method comprises injecting into the chamber a combustible mixture of combustion gas and oxygen at a pressure in the chamber of at least two atmospheres above ambient atmospheric pressure, feeding into the chamber a powder comprising self-fluxing alloy particles, and combusting the combustible mixture in the chamber means whereby a supersonic spray stream containing the powder is propelled through the open channel. The spray stream is directed toward a glass mold plunger substrate such as to produce a coating thereon which is ground and polished. The coating may be fused prior to grinding.

REFERENCES:
patent: 2317173 (1940-02-01), Bleakley
patent: 2875043 (1959-02-01), Tour
patent: 3455510 (1966-11-01), Rotolico
patent: 3530892 (1968-03-01), Charlop
patent: 3617358 (1967-09-01), Dittrich
patent: 4382811 (1981-03-01), Luscher et al.
patent: 4416421 (1981-07-01), Browning

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