Shot blasting machines and sand blasting machines are both commonly used surface treatment equipment. They can both remove dirt, rust and polish the surface of workpieces, but there are some differences between the two in terms of working principles, treatment effects and scope of application.

Different working principles:

The working principle of the shot blasting machine is to project steel shots, sand and other particles onto the surface of the workpiece through a high-speed rotating impeller to generate impact and friction to remove impurities such as surface oxide scale, rust, and dirt. The sand blasting machine uses compressed air to spray abrasives such as sand onto the surface of the workpiece, generating impact and friction to achieve the effect of surface treatment.

Different treatment effects:

Since the shot blasting machine uses high-speed steel shots or sand for spraying, it has higher impact force and better decontamination and rust removal effects, which can more thoroughly remove dirt and impurities on the surface of the workpiece, and at the same time can also improve the finish and roughness of the workpiece surface, and increase the adhesion and wear resistance of the workpiece surface. The sand used by the sand blasting machine is relatively large, with poor impact force and decontamination effects, and is more suitable for slight surface treatment and polishing.

Different scope of application:

Shot blasting machines are mainly suitable for processing larger and heavier workpieces, such as steel plates, castings, steel structures, etc., and are also suitable for surface treatment and repair in industries such as steel, automobiles, ships, and building materials. Sand blasting machines are more suitable for processing smaller and lighter workpieces, such as small parts, auto parts, etc., and are also suitable for surface treatment in mold manufacturing, plastic products, artworks, and other fields.

In summary, there are certain differences between shot blasting machines and sand blasting machines in terms of working principles, treatment effects, and scope of application. The specific choice of equipment should be comprehensively considered based on actual needs.