| 摘要 |
1,046,865. Spraying fusible materials. SIEMENS-SCHUCKERTWERKE A.G. July 29, 1963 [Aug. 25, 1962], No. 30035/63. Heading B2F. Metallic or ceramic powders are sucked into the plasma channel of an arc discharge spraying apparatus by the ejector action of the plasma flowing through a constricted part 13a of the channel; and the suction pipe 15, 34 leads into the powder reservoir 31 and terminates in a tube 35 which does not reach the bottom of the reservoir. Low-pressure gas is introduced by pipe 33 into the reservoir beneath the tube 35 to produce a turbulent suspension of powder therein. To vary the powder supply, the lower end of tube 35 can be adjusted to different distances from the bottom of the reservoir. |
