Working principle of Shot blasting is using high speed rotating impeller to make small steel shot or small iron shot out then with high-speed crash the surface of workpiece, it can remove the surface oxidation layer of parts. At the same time steel shot or iron shot high speed impacts the parts surface, causing parts surface grid work of the distortion, increased surface hardness, is a method to clean up the parts surface .Shot blasting commonly used to clean up or casting surface for parts surface strengthening processes. General shot blast used to the rules shape, several wheel blastings together up and down, high efficiency, low pollution.
Working principle of sandblasting is to use compressed air to blow out the quartz sand high-speed to crash parts surface to clean up . Factory also called blowing sand, not only to rust, but alsol can remove the oil , is very useful for painting arts. Mainly used in parts surface derusting; For parts surface modification (the market sell small wet sandblasting machine is for surface modification , the sand is usually steel jade, medium is water); In steel structure industry, the application of high strength bolts for the link is a more advanced method, because of the high strength connection with surface is to use of the friction between the force transmission to, so for combining the quality requirements of the surface is very high, then must be combined with sandblasting processing to the surface.
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