| 摘要 |
PROBLEM TO BE SOLVED: To effectively cool a nozzle to inject plasma arc toward a work with cooling water. SOLUTION: A nozzle A is attachable/detachable to/from a plasma torch B, and consists of an assembly body of an inner nozzle 2 and an outer nozzle 3 with an injection hole 1 to inject plasma arc formed in the center thereof. An annular cooling water passage 8 and at least three independent water passages 9 communicating with the cooling water passage 8 are formed between the inner nozzle 2 and the outer nozzle 3. COPYRIGHT: (C)2005,JPO&NCIPI
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