Application of white aluminum oxide in sandblasting of mobile phone accessories
The application of white aluminum oxide in the field of sandblasting of mobile phone accessories is mainly reflected in the following aspects:
1. Surface cleaning and pretreatment
Removal of processing residues
White aluminum oxide particles can effectively remove the oxide layer, oil stains and tiny burrs on the surface of mobile phone metal frames, middle frames and other accessories through high-speed spraying, ensuring the cleanliness of the substrate and providing an ideal substrate for subsequent anodizing or electroplating processes.
Uniform surface state
Its high hardness characteristics can evenly peel off surface impurities of different materials (such as aluminum alloy, stainless steel, etc.), avoid the problem of uneven coating adhesion, and are particularly suitable for the pretreatment of multi-material combination accessories.
2. Improve texture and functionality
Customized surface roughness
By adjusting the particle size of white aluminum oxide (such as 240-400 mesh micropowder), a fine and uniform matte texture can be formed on the surface of the metal shell of the mobile phone, enhancing the grip and anti-slip properties, while retaining the metallic luster, taking into account both beauty and practicality.
Strengthening the adhesion of coatings
The microscopic rough surface added after sandblasting increases the adhesion of UV coatings, PVD coatings and other processes by more than 30%, significantly reducing the risk of peeling during use.
3. Fine polishing and repair
Screen glass edge processing
Using ultra-fine white aluminum oxide micropowder above 6000 mesh to polish the edges of curved glass cover plates can eliminate cutting microcracks, improve light transmittance and touch smoothness, while maintaining glass strength.
Accessory repair and renovation
For scratched mobile phone metal buttons or camera decorative rings, the use of white aluminum oxide sandblasting with controllable particle size can achieve local texture reconstruction and restore visual consistency.
4. Adaptability and efficiency advantages
Multi-material compatibility
White aluminum oxide sandblasting can simultaneously process 6063 aluminum alloy, 316L stainless steel, tempered glass and engineering plastics (such as PC/ABS) commonly found in mobile phone accessories, without the need to frequently change abrasives.
Environmentally friendly and efficient
Compared with the traditional pickling process, white aluminum oxide sandblasting has no chemical pollution, and the recycling rate is over 85%. The daily processing capacity of a single machine can reach 5000-8000 pieces, which is suitable for the rhythm of automated production lines.
Note: The current mainstream process mostly uses 240-800 mesh white aluminum oxide powder, combined with 0.4-0.6MPa air pressure, which can achieve efficient processing while maintaining 0.8-1.2μm Ra surface accuracy.