Metal fusion bonding – Process – Plural diverse bonding
Patent
1996-08-26
1998-06-30
Bradley, P. Austin
Metal fusion bonding
Process
Plural diverse bonding
228254, 427226, 427229, B23K 100, B23K 35365
Patent
active
057721041
ABSTRACT:
Methods of brazing and coating and preparing articles for brazing and coating are disclosed. Prior to assembly and brazing, the articles are coated with a coating composition including a hot melt adhesive medium and brazing materials. To coat the articles, the hot melt adhesive medium and brazing materials are first mixed at elevated temperatures to form a liquid coating material, the material is allowed to harden, and the hardened material is then melted onto the articles to form a hard coating. The coated articles are then assembled for brazing. During the brazing process, the articles are first preheated to a sufficient temperature to substantially gasify and remove the hot melt adhesive medium from the articles. This leaves only the brazing materials on the articles for clean and efficient brazing of the articles in a conventional brazing oven. In one embodiment, the hot melt adhesive medium takes the form of a hot melt glue from the chemical family of ethylene-vinyl acetate bases.
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Bradley P. Austin
Knapp Jeffrey T.
Peerless of America Incorporated
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