Surface polishing of aluminum profiles is an important process in the processing of aluminum profiles, which can improve the durability and aesthetics of aluminum profile products, thereby enhancing the value and attractiveness of aluminum profile products. The following are the main categories of aluminum profile polishing processes and brief descriptions introduce.
1.Mechanical Polishing
Mechanical polishing can produce a wide variety of surface finishes and textures, whether it’s a rough surface, a patterned matte look, or a classic mirror-gloss finish. Mechanical polishing can be achieved by various methods such as polishing, sanding, sandblasting, grinding or tumbling.
If anodizing is required for aluminum extrusions, it must first be mechanically polished. This allows the surface texture created by mechanical polishing to show through the anodized layer and enhance the appearance of the product. The polishing process also helps to remove small defects on the surface of the aluminum profile.
2.Grinding And Polishing
Abrasive polishing is a common mechanical polishing method used to grind hard materials and reduce tolerances on product surfaces. In this process, a rotary grinder is used, and the abrasive material is placed on a grinding wheel or belt attached to it. Rough surfaces rub against metal surfaces to remove excess material or irregularities. Because the process generates a lot of heat, grinding is carried out at low speeds and a lubricant is used to cool the grinding machine and the aluminum profile.
3.Sanding Process
Sanding is another technique used to create the desired texture on aluminum extrusions, usually in the form of a large belt sander. The surface finish produced by sanding can be tiny parallel lines etched in the same direction on the surface of the product, or tiny grooves that create a feather-like texture and reduce the reflective quality of the aluminum. Another popular effect is the cross-hatched pattern. This finish is commonly used for bathroom hardware, picture frames and other aluminum extrusions.
4.Shot Peening Process
Another mechanical polishing process is shot peening, which produces a granular finish that helps hide excessive surface defects.
5.Roll grinding process
Tumble grinding is a versatile mechanical polishing method that aids in deburring, cleaning and polishing.
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