The longer the shot blasting time of the shot blasting machine, the greater the roughness of the workpiece surface. The treatment time is too short, resulting in unclean treatment and affecting the coating quality. If the treatment time is too long, firstly, it will cause energy waste and increased pellet consumption, which will increase the cost; secondly, it will cause the surface roughness of the workpiece to increase, resulting in an increase in coating consumption and a decrease in anti-corrosion performance. Therefore, a reasonable processing time must be controlled. Due to the different thickness of the steel plate, the thickness of the oxide scale is also different, and the shot blasting time used is different. Workpieces with thin oxide scales have a short processing time, and workpieces with thick scales and severely corroded workpieces have a corresponding increase in processing time.
According to the multi-year production test of Puhua Heavy Industry Machinery, the shot blasting time should be controlled within 60-180s. The beam shot blasting line is an intermittent shot blasting line, which is processed by a single-side double shot blasting machine. During shot blasting, the workpiece surface is uniformly treated by the rotation of the workpiece. The shot blasting time is 60-180s. However, because the beam shot blasting line is produced by mixed flow of various workpieces, the thickness of the oxide scale of the workpieces is different, and the rusted parts are added, so the shot blasting time is also different. The longitudinal beam shot blasting line is a pass-through shot blasting line, which is processed by double-sided double shot blasting machines, and the workpiece runs on the roller table during shot blasting. The workpiece is processed by the upper and lower shot blasting at the same time. The shot blasting time is adjusted by the chain speed. The process chain speed is 2~3m/min.
original source: https://www.puhuamachine.com/news/how-to-control-the-shot-blasting-time-of-the-shot-blasting-machine/
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