Sandblasting is a surface treatment technology that mainly uses high-speed jetting of abrasives (such as sand, glass beads, iron shots, etc.) to clean and/or pre-treat the surfaces of various materials. This technology is widely used in industrial production, especially in metal surface treatment, casting cleaning, mold cleaning, art restoration and other fields.
The principle of sandblasting is based on the following points:
1. **Abrasive selection**: Select the appropriate abrasive according to the type of material to be processed and the surface state. The hardness, shape and size of the abrasive will affect the effect of sandblasting.
2. **Air pressure and abrasive flow rate**: The abrasive is accelerated to high speed by compressed air, and the high-speed airflow carries the abrasive to hit the target surface. Air pressure and abrasive flow rate are key parameters that affect the energy transfer and efficiency of the abrasive.
3. **Angle and distance**: The angle and distance between the nozzle and the target surface have an important influence on the sandblasting effect. The correct angle can maximize the utilization of the abrasive, reduce damage to the operator, and improve work efficiency.
4. **Safety measures**: During the sandblasting process, appropriate protective measures must be taken, including wearing personal protective equipment (such as protective glasses, respirators, protective clothing, etc.) to protect the operator from splashing abrasives and dust.
The sandblasting process can not only remove dirt, grease, oxide layer, etc. on the surface, but also increase the surface roughness, providing good base conditions for subsequent coating, welding, heat treatment and other processes. At the same time, reasonable sandblasting parameter settings can also avoid excessive damage to the target surface and maintain its original physical properties and aesthetics.
