APPARATUS FOR GASODYNAMICALLY APPLYING COATINGS OF POWDERED MATERIALS Russian patent published in 1997 - IPC

FIELD: coatings. SUBSTANCE: apparatus contains compressed air source 1 connected through pipeline 2 to heating unit 3. Outlet of the latter is connected to inlet of supersonic nozzle 4, supercritical part of which 5 is connected through pipeline 6 with powder feeder-dispenser 7. Compressed air is fed through pipeline 2 into heating unit 3 where it is heated to required temperature. Heated air directly enters supersonic nozzle where it is accelerated to several hundred meters per 1 sec. Powder material from feeder-dispenser 7 is fed through pipeline 6 into supersonic part 5 of nozzle and is accelerated by air flow over the section of nozzle from inlet point to end of nozzle. EFFECT: enhanced efficiency due to decreased weight, reduced heat loss, and increased operational safety. 2 cl, 1 dwg