As the name suggests, the core component of a rotary table shot blasting machine is a horizontally rotating turntable. The workpiece is placed on this turntable and is subjected to the impact of high-speed projectiles from the shot blaster above as the turntable slowly rotates, thus achieving a comprehensive cleaning of the workpiece surface.

Working principle and process

The operating process of a rotary table shot blasting machine is very straightforward and can be summarized in the following steps:

Loading (manual/automatic): An operator or robot hoists or places the workpiece to be processed onto the rotating turntable. The turntable is typically divided into inner and outer rings, which can rotate at the same or different speeds to ensure thorough cleaning.

Channel Closure: The turntable is surrounded by a sealed shot blasting chamber. During operation, the door is closed to prevent the escape of shot and dust.

Shot Cleaning: One or more shot blasters located at the top of the shot blasting chamber are activated, projecting shot at high speed onto the workpiece surface. Simultaneously, the turntable rotates slowly and at a constant speed, carrying the workpiece, ensuring that all surfaces are evenly impacted by the shot.

Shot Recycling and Recovery: The mixture of ejected shot, removed sand, and dust falls through the grille holes surrounding the turntable onto a screw conveyor at the bottom. It is then transported by an elevator to a shot-sand separator for separation. Good shot is automatically recovered and fed back into the shot blasters, while broken shot and dust are discharged. 

Blow-off Cleaning: After the shot blasting process is complete, the shot blasting machine stops operating. The machine's built-in high-pressure purge system (usually located above or to the side of the turntable) activates to remove any remaining shot and dust from the workpiece surface and recesses.

Channel Opening and Unloading: The shot blasting chamber door opens, and the turntable stops. The operator lowers the cleaned workpieces and then loads the next batch of workpieces, beginning the cycle anew.