The working principle of the filter cartridge of a shot blasting machine is as follows:During the operation of the shot blasting machine, the air carrying dust and debris is drawn into the filter cartridge. The filter cartridge is usually made of a porous material that can trap the dust particles. As the air passes through the filter cartridge, the dust is filtered out and retained on the surface or within the pores of the filter cartridge, while the clean air is allowed to pass through and be discharged. This helps to maintain a clean working environment and prevent the spread of dust. The filtered dust gradually accumulates on the filter cartridge, and periodic cleaning or replacement of the filter cartridge is required to ensure its continuous and effective filtering function.