Reflow furnace

Details Reflow furnace Reflow furnace

1988-09-12

1991-08-13

Walberg, Teresa J.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

219400, 392 40T, F27D 1102

Patent

active

050398415

ABSTRACT:
A tunnel-type reflow furnace containing a preliminary heating zone and a main heating zone is disclosed. In the furnace, at least two pairs of infrared heaters are disposed on both the top and bottom of a tunnel providing a pathway for the transfer of an article to be heated, and the infrared heaters are of a gas blowing type. In a preferred embodiment, a gas-blowing nozzle that is freely adjustable in the direction of gas blowing is provided between infrared heaters on both the top and bottom of the tunnel. This furnace allows the heating profile to be easily changed in accordance with a specific use. It is also capable of efficient and uniform heating of a printed circuit board even if it carries many components at high density. As a result, the furnace ensures reliable soldering of the circuit board.

REFERENCES:
patent: 3393532 (1968-07-01), Khoylian
patent: 3496332 (1970-02-01), Lunde
patent: 3900959 (1975-08-01), Breschi
patent: 4148575 (1979-04-01), Siryj
patent: 4198145 (1980-04-01), Scott
patent: 4416618 (1983-11-01), Smith
patent: 4565917 (1986-01-01), Furtek
patent: 4654502 (1987-03-01), Furtek
patent: 4756091 (1988-07-01), Van Denend
patent: 4833301 (1989-05-01), Furtek

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