| 摘要 |
A thermal spraying apparatus prevents adhesion of spray fumes to unsprayed regions of a bore surface during arc spraying. The apparatus includes a spray gun movable within a cylinder bore. The spray gun has at one end thereof a first discharge opening facing a direction orthogonal to the movement direction, has a second discharge opening facing direction orthogonal to the nozzle, and has, at a predetermined region located further to the side in the movement direction of the spray gun than the nozzle, third discharge openings for discharging a fluid and facing the same direction as the nozzle. A droplet, formed as arc spray wire material melts at the tip of the spray gun, is stretched with auxiliary air. By blowing atomizing air onto the droplet, spray particles are formed and sprayed onto the bore surface. Simultaneously, fume adhesion prevention air is blown toward the cylinder bore surface. |
