Adhesive bonding of aluminum coils

Details Adhesive bonding of aluminum coils Adhesive bonding of aluminum coils

1977-11-25

1980-04-08

Arola, Dave W.

Pipe joints or couplings

With access opening

291573R, 228119, 228203, 285157, F16L 1310

Patent

active

041969235

ABSTRACT:
The present invention is directed to a method and apparatus for joining aluminum members within an aluminum heat exchanger coil. A tubular member to be joined to a separate member in the coil has its exterior surface roughened by sand blasting to enhance adhesive adherence. The roughened surface is covered with a conversion coating to replace any accumulated aluminum oxide, to prevent the formation of additional aluminum oxides and to simultaneously provide a surface adapted to adhere to an adhesive. An adhesive is then applied to the mating areas of the tubular members to be joined and subsequently cured to form a tight secure joint. This invention is particularly useful in field repair of aluminum heat exchanger coils.

REFERENCES:
patent: 3476408 (1969-11-01), Wolfe
patent: 3498866 (1970-03-01), Kilbane
patent: 3633266 (1972-01-01), Taylor
patent: 3636186 (1972-01-01), Sturley
patent: 3750248 (1973-08-01), Morris
patent: 3796783 (1974-03-01), Greever
patent: 3877518 (1975-04-01), Dreksler
Bonding and Assembly Method, In Machine Design pp. 166-174, Apr. 1954. _
Adhesive Bonding, Some Important Applications, In Machinery and Production Engineering, pp. 1028-1035, May 29, 1968. _
Adhesive Bonding, Some Important Applications, In Machinery and Production Engineering, pp. 933-939, May 15, 1968. _

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