Apparatus for treating the surface of workpieces by means of a p

Details Apparatus for treating the surface of workpieces by means of a p Apparatus for treating the surface of workpieces by means of a p

1991-09-06

1993-10-05

Paschall, Mark H.

Electric heating

Metal heating

By arc

21912143, 21912148, 21912137, 427446, B23K 900

Patent

active

052507807

ABSTRACT:
The apparatus serves for treating workpieces by means of a plasma torch in a gaseous, preferably in an inert gaseous atmosphere. For this purpose, there is provided a gas-tight container and, in the interior of the container, a plasma gun as well as a cooling member for cooling the treated workpiece by a gaseous cooling medium stream. The cooling medium is a gas circulating in a closed circuit. Thus, the cooling gas can continuously used because heat is removed from the gas in a heat exchanger. A cooling operation can be realized in this way in temperature regions which are much higher than if liquefied gas is used.

REFERENCES:
patent: 4505945 (1985-03-01), Dubust et al.
patent: 4845334 (1989-07-01), Stocks et al.

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