| 摘要 |
PROBLEM TO BE SOLVED: To reduce the running cost required at replacement by introducing such a structure that the nozzle body 7 is not equipped with a mixing nozzle likely to be worn by a polishing material. SOLUTION: A jet hole 10 to jet high-pressure water is formed in the nozzle body 7, and below the hole adjacent thereto, a gas stream generating hole 11 of large diameter is formed. Space 12 accommodating the polishing material leads to the gas stream generating hole 11 through a plurality of lead-in passages 12A. When the high-pressure water is jetted downward from the jet hole 10, the air is sucked from a lower opening into the gas stream generating hole 11 and rises, and by this air flow, the polishing material is sucked into the hole 11 from a supply hole 12B. Thereafter the air flow including the polishing material and rising is turned back downward by a guide 11C, which causes the polishing material to cover the periphery of the high-pressure water, and in this condition, the polishing material and the high-pressure water are jetted to the work 2 to be processed. COPYRIGHT: (C)2008,JPO&INPIT
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