Polishing Aluminium Extrusion Products
Polishing and custom mechanical finishing adds durability and style to aluminium extrusion products using chemical or mechanical processes. Mechanical finishes are achieved using various methods like buffing, brushing, bead blasting, grinding, or tumbling.
Polishing can be used to enhance the look of aluminium parts on vehicles, TV and Hi-Fi Stands, cookers, door furniture, handles and many more.
To achieve a bright reflective finish on decorative parts specialist metal polishing is required, using abrasives on the surface to remove oxidation, prevent contamination and to create a reflective surface to enhance appearance.
This polishing takes place on various types of machinery using the correct abrasive on a polishing wheel/belt, ensuring the correct polishing head or mop is used. The part may need a heavy polish or just buffing depending on the customer’s choice of finish and the shape of the part.
To prevent further oxidisation the parts can then be treated with a nitric acid based chemical. This is the brightening process before the anodising, which preserves and protects the bright finish.
We go through this process for the supply of high-end accessories (clamps/brackets and poles) for a major TV and Hi-Fi Company.
Getting the Right Finish for Your Aluminium Extrusion
We can also offer a brushed finish on your parts, as well as a finish that makes aluminium look like stainless steel.
Brushing is another technique used to produce a desired texture on aluminium extrusion products. The finish can consist of tiny parallel lines that are etched on the surface of the product, or as tiny grooves that create a feathery texture, which reduces the reflective qualities of the aluminium.
Another mechanical finishing process is bead blasting, which creates a granular finish that helps to hide excesses of imperfections on a surface.
If the final aluminium extrusion product needs to be anodized, the mechanical finishing must be completed first. This allows the surface texture to show through the transparent anodized layer, and enhances the appearance of the product.See Anodised Aluminium