Device for the dosed conveying of powder to a powder processing

Details Device for the dosed conveying of powder to a powder processing Device for the dosed conveying of powder to a powder processing

1992-04-14

1993-12-28

Drodge, Joseph W.

Coating apparatus

Control means responsive to a randomly occurring sensed...

Responsive to condition of coating material

118308, 177 16, 177 59, 222 55, 222 56, 406 32, 406 52, B05C 1100

Patent

active

052735842

ABSTRACT:
The device for the dosed conveying of powder to a powder processing unit, particularly to a plasma spray device, comprises a volumetric dosing unit and a weighing unit which together allow a gravimetric powder dosing. The dosing unit includes: a rotatable dosing disc having a vertical axis of rotation; a drive unit mounted below said rotatable dosing disc; and powder feeding and withdrawal means mounted above said dosing disc. This dosing unit, having first and foremost a vertical extension, is fixed to a weighing platform which rests on a plurality of weighing cells. The drive unit is arranged below said weighing platform, in order to situate the center of gravity of said dosing unit at least approximately at the level of said weighing platform. This considerably reduces the liking of the dosing unit, as compared with a weighing platform arranged entirely above the dosing unit, thus allowing a gravimetric powder dosing with high accuracy and uniformity.

REFERENCES:
patent: 2800252 (1957-07-01), Wahl
patent: 4227835 (1980-10-01), Nussbaum
patent: 4528848 (1985-07-01), Hafner
patent: 4576526 (1986-03-01), Muller et al.
patent: 4789569 (1988-12-01), Douche et al.
patent: 5038973 (1991-08-01), Gmur
patent: 5104230 (1992-04-01), Douche et al.

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