Uniform braze application process

Details Uniform braze application process Uniform braze application process

1986-01-14

1986-08-19

Ramsey, Kenneth J.

Metal fusion bonding

Process

Plural joints

228 22, 228248, 228181, 291573D, 29DIG4, B23K 104, B23K 112

Patent

active

046064958

ABSTRACT:
A method of forming thin, uniform braze joints is effected through the use of curtain coating. Braze powder is admixed with a liquid polymeric binder to form a slurry. The slurry is forced through the slots in a curtain coating head and deposited on at least one of the metal surfaces to be bonded together. The method has particular utility for bonding fin/plate sections of a heat exchanger where the fins have a U-shaped cross section. The slurry is deposited on the top portion of the fin and the side portion of the fin and wiped from the top portion leaving braze material primarily on the side wall portion. When the plates are contacted to the fins and heating performed, a bond is effected with maximum plate-to-fin contact for high heat transfer and a strong braze joint.

REFERENCES:
patent: 2996407 (1961-08-01), Mecker
patent: 3222775 (1965-12-01), Whitney
patent: 3656224 (1972-04-01), Blair et al.
patent: 3967045 (1976-06-01), Kurobe
patent: 4053969 (1977-10-01), Bayard

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