What are the characteristics of rotary plasma spraying

       Rotary plasma spraying is particularly suitable for inner hole spraying. The workpiece remains stationary during spraying, and the plasma spray gun rotates at a certain speed and moves vertically along the central axis of the inner hole. The key technology of the system is a special device to make the plasma spray gun rotate (up to 200r/min), and to ensure the stability of the working gas, powder feeding and cooling water in the spray gun.



      The rotary plasma spraying system (Rota Plasma500) developed by Sulzer-Metco has been used to spray the wear-resistant and heat-resistant coating on the inner wall of the Volkswagen Lupo FSI automobile engine cylinder. The system only needs 90s to spray a cylinder bore with a diameter of 80mm and a depth of 120mm, and the coating thickness is 150μm~200μm.

     However, due to the characteristics of rotary plasma spraying itself, the spraying distance cannot be adjusted, and it can only be used for a special gun. When it is necessary to spray workpieces with different inner diameters, the gun must be changed.

     Rotary plasma spray is shown here.