| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase the flow rate of coolant supplied to the nozzle of a plasma torch, and to extend the service life of the plasma torch. <P>SOLUTION: In the plasma torch (10), an electrode coolant passage (60, 84, 85, 86 and 64) which supplies the coolant to an electrode (80), and a nozzle coolant passage (56, 70, 92, 72 and 68) which supplies the coolant to the nozzle (88) are provided separately as independent coolant passages which extend in parallel and are mutually electrically insulated from each other. The coolant is flowed in the nozzle coolant passage in a flow rate greater than that of the electrode coolant passage. <P>COPYRIGHT: (C)2012,JPO&INPIT |
