Although both the shot blasting machine and the sandblasting machine are used for derusting, cleaning and strengthening the surface of the workpiece, there are obvious differences in the working principle, applicable workpiece, processing efficiency and use scenarios. Many customers are easily confused when selecting the type. The following is a clear comparison from the practical application point of view. The working principle is different. The sandblasting machine is powered by compressed air, and the abrasive such as emery and glass beads are sprayed onto the surface of the workpiece through the spray gun. It is a pneumatic sandblasting machine. The strength is controllable and suitable for fine processing. The shot blasting machine uses a motor to drive the shot blasting device to rotate at high speed. It shoots steel and iron balls at high speed through centrifugal force. It belongs to the mechanical projecting machine. The impact force is stronger and the cleaning is more thorough.
Applicable to different workpieces. The sandblasting machine is suitable for ** small, precision, special-shaped, and mold-type workpieces **. It can manually or automatically fine process local, dead ends, and complex structures, and is not easy to damage the workpiece. The shot blasting machine is more suitable for ** large and medium-sized castings, forgings, steel structures, frames, and other batch workpieces **. It is suitable for workpieces that are not afraid of collision and need high-strength cleaning. The processing efficiency is different. The sandblasting machine is mostly manual or semi-automatic piece-by-piece processing. The efficiency is moderate and the flexibility is strong **. The shot blasting machine can realize continuous operation of crawler, hook, and pass-through. The cleaning speed is fast, and it is suitable for large-scale automated production **. The efficiency is much higher than Sandblasting can achieve matte, matte, fine and uniform surface, with controllable roughness, and is mostly used for coating pretreatment and appearance modification. Shot blasting has a large impact force, which can remove heavy oxide skin and molding sand, and at the same time eliminate internal stress, improve workpiece strength, rougher surface, and stronger coating adhesion.
The structure and cost of the equipment are different. The sandblasting machine is simple in structure, small in size, low in investment, and easy to maintain. It is suitable for small workshops and small batches. The shot blasting machine comes with its own projectile cycle, dust removal, and conveying system. The structure is complex and the early investment is high, but the long-term batch use cost is lower and more environmentally friendly. Simple summary: small pieces, fine, and local treatment are selected ** sandblasting machine **; large pieces, heavy, large batches, and high-intensity cleaning are selected ** shot blasting machine **. The two can be used together according to the type of workpiece to meet different surface treatment needs.
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