Nano-coating of aluminum alloys for the manufacturing process of waiting chairs
Aluminum alloy profile in the manufacturing process of row chairs: mechanical polishing -> degreasing -> in addition to the oxide film -> chroming -> powder spray or liquid -> baking -> hanging -> full inspection -> packaging -> storage
Coating is divided into dip coating, spraying, lacquering, rolling and brushing, etc. Among them, dip coating and spraying are the main, dip coating is also known as electrophoretic coating, which uses electrochemical methods to deposit particles of organic resin on the surface of the workpiece to form transparent or various colors of organic coatings. Among them, cathodic electrophoresis is a new process developed in the seventies and is the main process in the dip coating industry. Advantages of good corrosion resistance, strong resistance to discoloration, good bonding characteristics. Spraying is divided into powder coating and liquid coating, of which electrostatic coating is the more popular process in the industry.
Due to good corrosion resistance, low price, more color (can do any different color) it is suitable for all aluminum materials, but the structure of the material is too loose, such as sand products, need to scrape the dust operation, the relative quality also has to be poor.
Under the action of the pump, the paint into the electric field, paint particles with negative charge. Under the action of the atomizing air pressure, the paint becomes finer and more uniform and then under the action of the working air pressure, the paint in the role of the rotating cup or nozzle, evenly sprayed on the surface of the workpiece. Because in the same vertical plane, the gun and the workpiece distance is equal, the same interface electric field strength is also the same, so the positive and negative charges attract each other, the surface of the workpiece is coated with a layer of uniform organic resin coating. The resin is then levelled and cured under high temperature baking conditions. The resin is then leveled and cured under high temperature baking conditions, and firmly embedded on the surface of the workpiece to protect the workpiece.
As the nano-coatings use nano-monomer slurry and nano-emulsion, nano-color paste, nano-bactericides, nano-multifunctional additives and other series of nano-materials production, compared with the existing raw materials used in latex paint has incomparable superfine and unique, the overall performance and quality of its products is much better than its similar products, and the cost is lower than traditional products, and has the following characteristics.
1、Use of nano-materials double sparse mechanism, so that effective discharge of water coating, and prevent the intrusion of external water, so that the film has the ability to breathe.
2、Use of nano-materials and its special function and micro-molecular structure, and the wall of inorganic silica and calcium coordination reaction, so that the wall and the coating film to form a solid claw-like penetration suitable, so that the coating film will not fall off, not skin, high hardness and scrub resistance.
3、 Utilizing the physical property principle of super dual interface of nanomaterials, it can effectively discharge the intrusion of dust and oil, so that the wall has good self-cleaning function.
4, the use of nano-materials photocatalytic technology, the air of harmful gases in the efficient decomposition and elimination, and can reduce the decomposition of ultraviolet radiation, so that the coating anti-aging ability to enhance, with air purification performance.
5, the use of nano-materials activation technology, so that the formation of antibacterial coating can be E. coli, Staphylococcus aureus and other cell membrane destruction, so as to effectively kill or inhibit the reproduction of bacteria.
6, unique environmental protection: room temperature and pressure production, non-toxic, tasteless, pollution-free, water-soluble and environmentally friendly.
7, strong adhesion: strong adhesion to metal materials.