| 摘要 |
PROBLEM TO BE SOLVED: To provide a sand blaster stably feeding blast sand to a mixer in the sand blaster for blowing out the blast sand from a nozzle connected to the tip of the mixer. SOLUTION: The blast sand is passed to a mixer 12 through a pipe 11 from the lower part of a sealed tank by pressurizing the inside of the sealed tank 10 storing the blast sand 16 with air after regulating high-pressure air by a pressure reducing valve 18 or by an air amount regulating valve. Polishing blast is executed on a metal or the like by blowing out the blast sand from the nozzle 15 after mixing the high-pressure air with the sand in a mixing chamber of the mixer by regulating and forcibly feeding a certain amount of the sand to the mixer 12. COPYRIGHT: (C)2006,JPO&NCIPI
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