| 摘要 |
PURPOSE:To improve the operating rate of equipment and to prevent the degradation in the quality of the thermally sprayed film of a work by arranging a device for cleaning a thermal spraying gun nozzle within a treating chamber of the plasma thermal spraying device cleaning of the nozzle. CONSTITUTION:After the inside of a treating vessel 1 having the thermal spraying gun 7 is evacuated to a vacuum, an inert gas is introduced therein and a door 3 is opened. The work 6 in an auxiliary vessel 2 is then inserted by a transporting device 5 into the treating vessel 1 and is set in the position opposite to the nozzle 8 of the thermal spraying gun 7. Thermal spraying powder is plasma thermally sprayed to the surface of the work 6 from a feed port 9 and thereafter, the transporting device 5 is retreated and the thermally sprayed work 6 is returned into the auxiliary vessel 3. The door 3 is then closed. The nozzle cleaning device 12 mounted to the front end of the rod 13 in the treating vessel 1 is advanced to the position right under the thermal spraying gun 7 and the unmolten powder for thermal spraying in the nozzle 8 is removed and cleaned by rotating a brush 11 in order to prevent the dropping and sticking of the unmolten powder for thermal spraying sticking to the inside surface of the nozzle 8 of the thermal spraying gun 7 onto the surface of the work at the time of the next thermal spraying and the consequent deterioration of the quality of the thermally sprayed quality. |
