Brown corundum plays an important role in PCB sandblasting. Its high hardness, high density and good toughness make it an ideal sandblasting material. The following are the specific roles of brown corundum in circuit board sandblasting:
1. Beautify the surface: Through sandblasting, the surface of the PCB can present a uniform roughness, thereby increasing the beauty and texture of the product. This is of great significance for improving the overall quality of electronic products.
2. Improve production efficiency: Brown corundum abrasives have sharp particles and efficient grinding ability, which can complete the sandblasting of the PCB surface in a short time, thereby improving production efficiency.
Brown corundum
3. Remove surface dirt: Brown corundum abrasive particles are sprayed onto the surface of the circuit board at high speed, which can effectively remove metal oxides, rust, dirt, and processing residues, etc., making the PCB surface cleaner. This cleaning effect is crucial to improving the connection strength and stability of the circuit board, and helps the smooth progress of subsequent coating, welding or bonding processes.
4. Increase surface roughness: The surface roughness of the PCB after sandblasting increases, which helps to improve the adhesion of the coating material, making the coated PCB more solid and not easy to fall off. At the same time, the increased surface roughness can also improve the contact conditions between the circuit board and other components, and reduce friction and noise during mechanical operation.
In addition, brown corundum has the following advantages in circuit board sandblasting:
1. Concentrated particle size: Brown corundum abrasives have a variety of particle sizes to choose from, such as 220#, 240#, 280#, 320#, 400#, etc. These abrasives of different particle sizes can meet the different needs of the circuit board sandblasting process and ensure the consistency and stability of the sandblasting effect.
2. Not easy to pulverize: Brown corundum products have the characteristics of no explosion, no cracking, and not easy to pulverize during the application process, which helps to extend its service life and reduce the frequency of abrasive replacement.