Aluminum surface treatment process discussion
Metal materials are increasingly used in various products, because metal materials can better reflect the quality of products and highlight the brand value. (to form a satin-like effect), electroplating (covered with a layer of other metals), spraying (covered with other non-metallic coatings)
1. Sandblasting (shot blasting)
The process of cleaning and roughening the metal surface using the impact of a high-speed sand stream. This method of surface treatment of aluminum parts can make the surface of the workpiece to obtain a certain degree of cleanliness and different roughness, so that the mechanical properties of the surface of the workpiece are improved, therefore improving the fatigue resistance of the workpiece, increasing the adhesion between it and the coating, extending the durability of the coating film, but also conducive to the leveling and decoration of the coating. The process we often see in various products of Apple, as well as being the existing TV face case or center frame is also increasingly used.
The use of mechanical, chemical or electrochemical methods to reduce the surface roughness of the workpiece, in order to obtain a bright, flat surface processing methods. Polishing process is mainly divided into: mechanical polishing, chemical polishing, electrolytic polishing. Aluminum parts using mechanical polishing + electrolytic polishing can be close to stainless steel mirror effect, giving a high-grade simple, fashionable future feeling (of course, easy to leave fingerprints and more care).
3. Wire drawing
Metal brushing is the manufacturing process of repeatedly using sandpaper to scrape out the lines of the aluminum plate. Wire drawing can be divided into straight wire drawing, messy wire drawing, rotary wire drawing, threaded wire drawing. Metal processing micro letter, the content is good, worthy of attention. Metal brushing process, can clearly show every fine silk marks, so that the metal matte in the flood of fine hair luster, the product is both fashion and technology.
4. High-gloss cutting
The diamond cutter is reinforced by a precision engraving machine in the high-speed rotation (generally 20,000 rpm) of the spindle of the precision engraving machine to cut parts, producing a local high-gloss area on the surface of the product. The brightness of the cutting highlight is affected by the speed of the milling drill, the faster the speed of the drill the brighter the cutting highlight, and vice versa, the darker and easier to produce knife patterns. Metal processing micro letter, the content is good, worthy of attention. High-gloss high-gloss cutting in the use of cell phones in particular, such as iphone5, in recent years, some high-end TV metal frame using a high-gloss milling process, coupled with anodic oxidation and brushing process makes the TV overall full of a sense of fashion and technology sharpness.
5. Anodic oxidation
Anodic oxidation refers to the electrochemical oxidation of metals or alloys, in which aluminum and its alloys form an oxide film on aluminum products (anode) under the action of an applied current in the corresponding electrolyte and specific process conditions. Anodic oxidation can not only solve the defects of aluminum surface hardness and wear resistance, but also prolong the service life of aluminum and enhance the aesthetics, which has become an indispensable part of aluminum surface treatment and is the most widely used and successful process.
6. Two-color anodizing
Two-color anodizing refers to anodizing on a product and giving a different color to a specific area. Two-color anodizing is more costly because of the complexity of the process; however, the contrast between the two colors better reflects the high-end, unique appearance of the product.