First, the shot blasting machine uses shot blasting materials for surface treatment. Shot peening is a reusable material in the form of solid particles, usually steel balls or cast steel sand. The shot blasting machine accelerates the shot blasting material to the surface of the workpiece, and removes the dirt and coating on the surface through impact and friction. Shot blasting machine is suitable for hard materials such as metal and concrete and workpieces with high surface quality requirements.
Sandblasting machine uses abrasives for surface treatment. Abrasive is a fine-grained material, usually quartz sand, alumina or glass beads. Sandblasting machine accelerates abrasive to the surface of workpiece, removes dirt through friction and impact, and increases roughness. Sandblasting machine is suitable for all kinds of materials, including metal, plastic, wood and workpieces with low surface quality requirements.
In addition, the operation modes of shot blasting machine and sand blasting machine are also different. Shot blasting machine usually adopts mechanical shot blasting or airflow shot blasting, and the shot blasting material is accelerated by machinery or airflow to the surface of the workpiece. Sandblasting machine accelerates abrasive spraying to the surface of workpiece by compressed air or water power.
To sum up, there are some differences between shot blasting machine and sand blasting machine in terms of materials, treatment methods and application scope. The choice of equipment depends on the specific workpiece material and surface treatment requirements. If the surface quality is high and the material is hard, you can choose a shot blasting machine; If the surface quality is not so high or the material is soft, you can choose a sandblasting machine.