Controlled atmosphere braze furnace with free part entry

Details Controlled atmosphere braze furnace with free part entry Controlled atmosphere braze furnace with free part entry

1995-11-13

1997-02-25

Heinrich, Samuel M.

Metal fusion bonding

Including means to apply flux or filler to work or applicator

Gaseous flux

228 8, 432 72, 110210, B23K 300

Patent

active

056052740

ABSTRACT:
A vestibule for part entry or exit from a flow through type of braze furnace in which no substantial physical barrier is necessary to prevent air exchange between the vestibule and the outside. A controller burner within the vestibule continually burns oxygen that does leak in, sensing whether combustion is complete trough the use of an analyzer in an exhaust stack. In addition, a neutral gas injector within the vestibule chamber maintains a near net zero pressure balance in order to minimize, though not prevent, ingress leakage. Parts can therefore enter the door freely without dragging through the impediment of a physical barrier.

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ASM, "Welding and Brazing", Metals Handbook, vol. 6, 8th ed., 1971.
ASM, "Heat Treating", Metals Handbook, vol. 4, 9th ed., 1981, pp. 361-377.
IBM Technical Disclosure Bulletin, "Reducing Inert Gas Consumption in a Reflow Furnace", vol. 34, No. 3, Aug. 1991, pp. 415, 416.

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