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In Continuous tumblast machines, castings are cleaned by shot blasting during an uninterrupted feeding process. The workpieces tumble in different directions within the rolling crawler, allowing all their surfaces to be impacted by the shot stream. The adjustability of the equipment’s tilt angle and rotation speed ensures that every part of the workpieces is struck by the shot stream in the desired manner. Workpiece Conveyance
Workpieces are transported to the blasting chamber by a vibratory conveyor. The workpieces are fed into the shot blasting machine through the crawler’s tilt and rotation. As they pass through the machine, they are struck by the shot stream. At the machine’s exit, the workpieces continue to be conveyed forward by a vibratory conveyor. Shot Circulation System
A feed screw conveyor supplies shot to all shot valves and blast wheels. The blast wheels propel the shot onto the workpieces in the blasting chamber. The used shot is collected into a hopper near an apron conveyor. The shot mixture is then transported by a belt conveyor and vibratory feeder to the first bucket elevator. The bucket elevator vertically conveys the mixture into a distributor, which transfers it to a magnetic/air cleaned shot separator. The separator delivers the cleaned shot mixture to the shot storage hopper. The shot-sand mixture is separated by the magnetic separator. The sand is discharged via a sand discharge screw conveyor to another small magnetic separator, where sand and shot are separated. The sand flows into a waste bin, while the shot is transported to the shot storage hopper of the No. 2 bucket elevator. After being vertically conveyed by the bucket elevator, the shot enters the feed screw conveyor. Dust-laden air collected from the blasting chamber, bucket elevators, and shot separator is drawn into a dust collector via a pre-dust collector chamber.