Powder recharging apparatus, especially for a coating apparatus

Details Powder recharging apparatus, especially for a coating apparatus Powder recharging apparatus, especially for a coating apparatus

1988-11-29

1990-05-08

Paschall, M. H.

Electric heating

Metal heating

By arc

219 7616, 21912148, 239 85, 222152, 222399, B23K 900

Patent

active

049240587

ABSTRACT:
In a powder recharging apparatus for a low-pressure plasma spraying system having a powder magazine with a fill pipe (22) at its bottom and a powder feeder (32) cooperating with the magazine (23) and connected by a hose or pipe to the vacuum chamber, a valve pair (19, 20) is inserted into the fill pipe (22) and is connected by a tee coupling (21) both to a valved vacuum pipe (25) and to an additional connecting pipe or flange (30), this flange (30) being joined by a releasable pipe coupling, such as a pipe union (18) for example, to the flange (29) of a funnel neck (10) of a supply funnel (9), a second valve pair (15, 16) being inserted between this flange (29) and the outlet connection (10). To refill it with powder, the upper assembly (A) of the system can be separated from the lower assembly (B) and then can be filled in a chamber flooded with noble gas after opening the valve pair ( 15, 16), and then, after it is reconnected to the assembly (B) with the valves closed, it is again in a position permitting the transfer of the powder from the supply funnel (9) into the supply magazine (23) of the powder feeder (32).

REFERENCES:
patent: 3807602 (1974-04-01), Meichsner
patent: 4279383 (1981-07-01), Zverev et al.
patent: 4678120 (1987-07-01), Matsuo
patent: 4835022 (1989-05-01), Huhne

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