1. Metal aluminum: You can use sandblasting (this is a vulgar saying in Guangdong, actually shot blasting) through the shot blasting machine to spray the emery under pressure, hit the metal surface, and form the metal surface according to the size of the emery (the unit is expressed by the number of meshes) The matte frosted effect. Usually used in lamps and furniture. This processing can only form the texture of the surface of the material, and it needs to be anodized again to make a special color, which is more gorgeous. Disadvantages: The shot blasting process is difficult to control the pressure. The automation equipment needs repeated experiments to operate the machine to achieve the ideal value. The deformation is very large. For open aluminum profiles and thin-walled parts, this method is not recommended. Or increase the deformation allowance when making rough parts. There is another way to avoid the modification method, which can be sprayed with alkali sand. Many European household wall-mounted water heaters with aluminum texture are commonly used. The effect is very similar to sandblasting, without the touch of sandblasting, it looks similar and the color is darker. More delicate. It doesn't look like the bright shining color after being anodized. Another process is oil spraying, which can also be used to imitate oxidation and sandblasting. The color is as fake as anodic oxidation, but the surface has the feeling of bright oil, like the feeling of being sprayed with a layer of bright oil after anodic oxidation. This method can process the plastic at the same time, but the plastic material is required to withstand a certain temperature, otherwise the plastic will deform and soften when the furnace is overheated. The spray made by this method will not discolor or explode due to overheating of the product, and it is also more resistant to scratches. Aluminum parts will also use powder spraying, but the powder spraying process usually costs more, so many products use iron powder spraying, and aluminum is usually colored by anodizing to protect the aluminum from being oxidized and blackened. Aluminum and steel plates are usually on the market. Corrosion lines treated with syrup are used, and there are also brushed boards made of whole sheets and grained boards such as snowflakes and sand. This process usually appears very high-end, which is commonly used in railings and elevator walls in subway stations and train stations. After the product is processed, the product is processed, but due to the manual operation, it is not recommended to draw the product that is too long, it is easy to make it very rough. Usually it is processed with scouring pad, steel wire ball and talcum powder. Even if there is a wire drawing machine, there are still relatively large human influence factors. This process can be used for most lamps, steel pipe furniture parts, and the kind of circular chassis and desktop processing on the rotating disk. Superimposing this process, you can find the fish scale pattern on some stainless steel desktops. In the early days, it was purely artificial to step on one by one, but now there are artificial auxiliary machines to make it. In order to avoid unevenness, if it is a plastic material, you can consider sun-texturing into a wire drawing effect, and then mix metal powder in the plastic masterbatch. After injection molding, there will be a drawing effect. You can also consider screen printing and spray painting on the inner wall of the transparent acrylic board. Can make imitation metal wire drawing effect. There are also silk-printed silk-printing patterns made of PET materialsCeramic Tile PVD Coating System on the market, and metal-like silk-drawing effects can also be made after electroplating, which is commonly used in mobile phone processing.
[Powder spraying] Powder spraying can achieve [snow pattern] like the appearance of the TV after losing the signal, the color is optional, and it feels bumpy, like the surface of the moon. But it's smooth. It is also possible to realize [Imitation Stone] after spraying on it, it can automatically form the effect of a stone, and it will feel the same as a real stone. [Imitation wood grain] This is not a special understanding, please correct me if there is something wrong. I have only seen the production process once in the dusting factory. The paper tape printed with wood grain is pasted on the metal surface, and then baked at high temperature. You guessed it right, this is the legendary hot printing. [Antique and dilapidated] This kind of craftsmanship has a high rate of defectiveness, and it depends on the master's hand. Usually a layer of primer is bronzed on the metal surface, and then a layer of dark paint is sprayed. Swipe the edges and corners with a steel brush to reveal the background color. Another method is to apply a dark paint as the primer first, and then use a brush to dip the bronze paint to sweep the edges and corners. This scheme is relatively simple to make, but it is not as realistic as the previous scheme. [Injection] The spray factory can usually make [Hand Paint] usually on the plastic surface. The hand paint itself has no color and is translucent. It feels very fleshy to the touch, and the thin spray paints feel a little fluffy. Since it has no color, the surface of the plastic part can be painted with a layer of primer or injection molded in different colors. Then spray the hand paint. [Imitation metal oxide sandblasting] This process can be made by spraying oil, and the production is relatively simple. It can be used on a variety of materials, including metal and plastic. It is cheaper than sandblasting and oxidation, and the yield is high. The raw material is not deformed. 2. I have talked about plastic plastic before, silk screen, heat transfer printing, oil spraying and hand-feeling paint can all be done. Sometimes bronzing is done, which is very high-end. Baidu can see the effect. Next I just want to talk about the special process [IMD, surface coating in-mold injection] The method is to first print the surface treatment pattern to be done on the film, and then inject it into the part together with the mold, usually using PC, ABS material. The advantage is that it can be made of various patterns, imitated metal drawing, imitated oxidation sandblasting, antique and old, any pattern and texture can be printed. The advantage is that no secondary processing is required, and there is no worry about scratching and discoloration. Take a look at Gree's latest cabinet air conditioner i Zun series all use this process. Philips started using this process fifteen years ago, and it has recently become popular again.
Let's talk about the anodizing treatment process. As a designer, we must go down to the private sector, go to the workshop, go to the production line to listen to the opinions of front-line workers, and go to the supplier for more transfer experience. As far as aluminum is concerned, if a designer does not consider the issue of mass production in the later stage, and uses 6061 or 6063 aluminum finishing or extruded profiles for mass production in the early stage, then you plan to do anodizing at this time without any problems, but instead A good solution, because such aluminum is similar to pure aluminum, contains less impurities, and will be softer. Hard anodizing will make them harder and increase their strength. The appearance is also beautiful. But if you happen to be planning to use the die-cast aluminum precision casting process for mass production, then I'm sorry, you have to be careful. Because the traditional die-casting process adopts ADC12 or ADC10, which is the American standard A383 and A380. Such materials are selected due to the consideration of mold opening process, but they contain more SI and CU. Once anodized, it will corrode the material and cause blistering trachoma powder, which looks disgusting and has no appeal at all. At this time, you can only choose oil spray or more luxurious pearl chrome plating, but no matter what, it can't look so flattering with anodizing. Thus, a new process was born, die-casting alumina. The raw materials of this process come from South Korea. If your tolerance is slightly wider, the proportion of CNC finishing in the later period is very small, but there are not many manufacturers that do this process, and it is mainly for products such as Xiaomi, Huawei, Lenovo, and Apple. Large companies provide supplies. For ordinary Xiaojia power plant engineers, don’t be delusional. Unless you have a boss who is willing to burn money, you should choose traditional craftsmanship and balance the pros and cons at the beginning of the design. Of course, aluminum and aluminum are different, and mold opening and proofing are different. My principle is to take these uncertain factors into account at the beginning of the design, and always prepare for mass production of molds. Don't draw a drawing for a prototype, and open a drawing for a mold. At that time, the revision will be changed to you vomit. It does not mean that overtime is dedication. In my work philosophy, short-term overtime occasionally is dedication, and year-round overtime is not considered at the beginning of the design.
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