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US 5,781,846 AGranted
Flux cored brazing composition
OwnerJames L. Jossickinventor
Life of this patent
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Abstract
A method of producing a flux-cored brazing composition for brazing aluminum that can be produced in lengths ranging from 500 to 10,000 feet long. The flux, preferably a finely powdered potassium fluoroaluminate complex, is deposited in an extremely small channel of aluminum filler material using a volumetric feeder to ensure an even distribution of flux to metal alloy.
Claims11
A method of preparing a brazing composition comprising the steps of:
- providing a narrow, elongate strip of aluminum silicon filler metal alloy having a melting temperature in the range of 577.degree. C. to 613.degree. C.;
- forming the strip about its longitudinal axis to form an elongate channel of metal alloy:
- depositing into the channel of metal alloy an extremely finely powdered flux material via a volumetric feeder, with the flux material being used in an amount such that the ratio of flux material to metal alloy, by volume, is in the range of about 60:40 to 10:90;
- rolling the filled channel about its longitudinal axis to form an elongate sheath of metal alloy enclosing a core of flux material;
- and
- forming the sheath into a desired shape.
3 more elements
Dependencies are inferred from the claim text.