Both shot blasting machines and sandblasting machines can clean metal surfaces. Shot blasting machines use high-speed rotating impellers (throwing heads) to throw abrasive materials out and impact the surface of the workpiece at high speed; Sandblasting machine uses compressed air to blow abrasive at high speed onto the surface of the workpiece, thereby achieving cleaning or treatment of the workpiece surface.
Shot blasting technology only entered the practical stage in 1932, several decades later than sandblasting technology, but due to its relatively high work efficiency, it developed rapidly and has been widely used.
Shot blasting machines are widely used for various operations such as surface roughening, deburring, fading, exposing material textures, and strengthening of workpieces; The objects cleaned by shot blasting machine mainly include machine parts, castings and forgings, coil steel, steel plates, section steel, steel structural parts, rubber parts, stone and sound-absorbing panels, etc; Sandblasting machines are widely used to improve the mechanical strength, wear resistance, fatigue resistance, and corrosion resistance of parts. They can also be used for surface extinction, oxide skin removal, and residual stress elimination in castings, forgings, and welded parts.
Compared with sandblasting machines, shot blasting machines save time, effort, energy, and abrasive during cleaning. The shot blasting machine can also achieve fully automatic production, with better cleaning effect and better working environment; Sandblasting machine equipment is simple, low-cost, not limited by the shape and position of the workpiece, easy to operate, but the working environment is poor.
