| 摘要 |
PROBLEM TO BE SOLVED: To solve the problems that, in the conventional plasma spraying torch, the flying locus of powder grains is regulated, e.g. by changing the size of a powder feeding port and the flow rate of a powder feeding gas, but, it is not effective in actual fact, and the problems that the sticking efficiency of a thermal spraying material is low, the quality of coating is unstable or the like occur, and, at the time of using the plasma spraying torch, the consumption of the anode and cathode occurs to change the shape of a plasma jet, therefore, the reregulation of the proper flying locus is needed, but, in the conventional plasma spraying torch, such regulation has been impossible. SOLUTION: In a plasma spraying torch in which the powder grains of a thermal spraying material are fed to the flow of a plasma jet sprayed from an anode nozzle hole 21a by arc discharge from a powder feeding port 26 provided on the upstream or downstream side of the anode nozzle hole 21a, the powder feeding port 26 is provided freely retrogressingly in the axial direction and movably in the approximately orthogonal direction to the flow of the plasma jet. |
