What is the difference between sandblasting machine and shot blasting machine

Many people often mix the sand blasting machine with the shot blasting machine. When in use, there is a certain difference between the sand blasting machine and the shot blasting machine.

The sandblasting machine uses compressed air as the power, and the compressed air brings sand (emery, corundum, etc.) to impact the surface of the workpiece, which changes the mechanical properties of the outer surface of the workpiece surface. There are many types of sandblasting machines, but the ultimate goal is to improve the fatigue resistance of the workpiece, increase the adhesion between it and the coating, extend the durability of the coating film, and also benefit the leveling and decoration of the coating. , To remove the impurities, variegated color and oxide layer on the surface, and at the same time make the surface of the medium rough, eliminate the residual stress of the workpiece and improve the surface hardness of the substrate.

Shot blasting machine uses an electric high-speed rotating impeller to throw small steel shots or small iron shots out to hit the surface of the part at a high speed, so the oxide layer on the surface of the part can be removed. At the same time, steel shot or iron shot hits the surface of the part at a high speed, causing the lattice distortion and deformation of the surface of the part, which increases the surface hardness. It is a method of cleaning the surface of the part. Shot blasting is often used to clean the surface of the casting or strengthen the surface of the part. deal with. Generally, shot blasting is used for regular shapes, etc., several blasting heads go up and down, left and right together, with high efficiency and low pollution.

In repair and shipbuilding, shot blasting and sandblasting are commonly used. But whether it is shot blasting or sand blasting, compressed air is used. Of course, it is not necessary to use a high-speed rotating impeller instead of shot blasting. Generally speaking, shot blasting (small steel shot) is used for steel plate pretreatment (rust removal before painting); sand blasting (ore used in shipbuilding and repairing industry) is mostly used for shaped ships or sections. The function is to remove the old paint and rust on the steel plate and repaint it. In the shipbuilding and shipbuilding industries, the main function of shot blasting machines and sandblasting machines is to increase the adhesion of steel plate coating paint.