surface polishing is an important processing technology in aluminum profile processing, which can improve the durability and beauty of aluminum profile products, so as to improve the value and attractiveness of aluminum profile products. The following are the main categories of aluminum profile polishing technology and a brief introduction.
Mechanical polishing can result in a wide variety of surface finishes and textures, whether it's a rough finish, 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 rolling.
If aluminum extrusion products require anodizing, mechanical polishing must be completed first. This allows the surface texture produced by mechanical polishing to show through the anodized layer and enhances the appearance of the product.
Grinding and polishing
Lapping is a common mechanical polishing method used to grind hard materials and reduce product surface tolerances. A rotary grinder is used in this process and the grinding material is placed on a grinding wheel or belt attached to it. The rough surface is rubbed against the metal surface to remove excess material or irregular parts. Because the process generates a lot of heat, grinding is done at low speeds and using lubricated liquid-cooled grinders and aluminum profiles.
Sanding is another technique used to produce the desired texture on aluminum extruded products, usually in the form of large belt sanders. The surface finish produced by sanding can be tiny parallel lines etched in the same direction on the product surface, or tiny grooves that create a feathery texture and reduce the reflective quality of the aluminum. Another popular effect is the cross line pattern. This finish is commonly used in bathroom hardware, picture frames and other aluminum extruded products.
Shot peening process
Another mechanical polishing process is shot peening, which produces a grainy finish that helps hide excessive surface defects.
Rolling grinding process
Tumbling is a versatile mechanical polishing method that aids in deburring, cleaning and polishing.