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A shot blast machine, also known as a shot blasting machine, is a surface treatment equipment that uses high - speed rotating impellers to throw pellets to complete cleaning or strengthening by impacting the surface to be treated. It mainly consists of a shot blasting system, a recovery and separation system, a dust - removal system, a control system, and a drive system.
The working principle is as follows. After the workpiece to be cleaned enters the shot - blasting chamber, the chamber door is closed. The pellets are continuously accelerated by the shot blaster at the top of the chamber and then thrown at the workpiece. After separation and transmission, the pellets are collected and recycled, and the entire process is controlled by the control system. Common types of shot blast machines include crawler - type, drum - type, hook - type, chain - type, and rail - through - type.
Shot blast machines have the characteristics of wide application range, high speed, high efficiency, and stable quality. They can significantly improve the service life and appearance of parts, and thus are widely used in various fields such as surface cleaning in the casting industry, road cleaning, weapon manufacturing, and vehicle and ship manufacturing. The history of shot blast machines can be traced back to 1870 when Benjamin from the United States theoretically studied sand - blasting treatment technology and wrote the first patent for a shot - blasting device, marking the official birth of the shot - blaster.