| 摘要 |
PROBLEM TO BE SOLVED: To provide a powder injection nozzle device for blasting which is excellent in working capability and durability at a nozzle part. SOLUTION: The powder injection nozzle device has an inner tube for powder injection, an outer tube, a mixing chamber, and an accelerated fluid supply part. The outer tube is concentrically arranged outside of the inner tube in a state that the tip is axially protruded farther than the inner tube. The tip of the outer tube faces a workpiece. The mixing chamber is formed between the tip of the outer tube and that of the inner tube. The accelerated fluid supply part supplies an accelerated fluid for acceleration of powder from a gap formed by the outer periphery of the inner tube and the inner periphery of the outer tube to the mixing chamber. Then, the powder energized by the accelerated fluid in the mixing chamber is directly injected to the workpiece. COPYRIGHT: (C)2006,JPO&NCIPI
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