The sandblasting machine needs to pay attention to the following points when processing aluminum materials:

- Abrasive selection:

- Abrasives with moderate hardness should be selected, and too hard abrasives should be avoided to prevent excessive damage to the surface of aluminum parts. For example, abrasive materials such as glass beads can be selected, whose Mohs hardness is relatively low, which can effectively remove impurities and oxidation layers on the surface of aluminum parts, while reducing the cutting effect on the aluminum part matrix.

- The particle size of the abrasive should be selected according to the processing requirements, generally rough grinding can choose a larger particle size of the abrasive, such as 40-60 mesh, for quickly removing the rough part of the surface of the aluminum; Fine grinding requires the selection of finer grained abrasives, such as 80-120 mesh, to obtain a smooth surface.

- Air pressure control:

- The air pressure should not be too high, too high air pressure will lead to abrasive injection speed too fast, resulting in impact pits and scratches on the surface of the aluminum parts. In general, the air pressure should be controlled between 0.3-0.6MPa, and the specific value can be adjusted according to the thickness and processing requirements of aluminum parts.

- It is also very important to maintain the stability of air pressure to avoid excessive fluctuations in air pressure affecting the processing quality. A pressure regulator can be installed to ensure that the air pressure is kept within a reasonable range during processing.

- Injection Angle and distance:

- The injection Angle should be adjusted according to the shape and processing requirements of the aluminum parts, and the injection Angle is generally recommended between 30°-60°. For aluminum parts with complex shapes, the Angle needs to be constantly adjusted to ensure that all parts can be evenly processed.

- The spraying distance should be moderate, too close will cause the abrasive concentrated in the local area, resulting in excessive wear; Too far will reduce the impact force of abrasive and affect the processing effect. Usually the spray distance is maintained at 100-200mm.

- Protective measures:

- A large amount of dust will be generated during the processing process, so it is necessary to be equipped with effective dust removal equipment, such as bag dust collector or cyclone dust collector, to prevent dust from causing harm to the health of the operator, but also to keep the working environment clean.

- The operator should wear protective equipment, including protective glasses, masks, earplugs and protective clothing, etc., to avoid injury to the body caused by abrasive splash.

- Aluminum surface pretreatment:

- Before sandblasting, it is necessary to clean the surface of the aluminum parts to remove oil, dust and other impurities to ensure that the abrasive can fully contact the surface of the aluminum parts and improve the processing effect. It can be cleaned with a cleaning agent and then dried or dried.

- For aluminum parts with an oxide layer on the surface, appropriate pickling treatment can be carried out first, and the oxide layer can be removed before sandblasting, so that better surface quality can be obtained.

- Post-processing treatment:

- The surface of the aluminum parts after sandblasting will be rough, and subsequent treatment is required, such as polishing, anodizing, etc., to improve the surface finish and corrosion resistance.

- The processed aluminum parts should be cleaned and dried in time to prevent the abrasive and moisture remaining on the surface from causing corrosion to the aluminum parts. It can be rinsed with water and then blown or dried with compressed air.