Apparatus for controlling powder flow rate in a carrier gas

Conveyors: fluid current – With means to control conveying fluid or movement of load in... – Control of conveying fluid

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239 79, 406 19, 406 30, 406 31, B65G 5366

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active

046132597

ABSTRACT:
Apparatus for delivering two or more powders at any controlled ration to a thermal spray apparatus permits the controlled production of graded sprayed coatings. The apparatus also monitors and controls the position of the spray apparatus relative to the workpiece and varies this position during the deposition of the sprayed layers. The apparatus includes in-process mass flow gauges which measure in real time the flow rates of the various powders and report these rates to a supervisory controller which verifies these rates against the predetermined schedule and can shut down the apparatus in the event of a malfunction. The substrate being sprayed has its substrate temperature monitored and controlled according to a predetermined schedule by a supervising controller.

REFERENCES:
patent: 2905538 (1959-09-01), McIntire
patent: 3163329 (1964-12-01), Mornas
patent: 4341107 (1982-07-01), Blair et al.
patent: 4368678 (1983-01-01), Ulveling

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