[China Aluminum Network] The traditional surface treatment process of aluminum profiles is oxidation, coloring, and sealing. The aluminum conversion film is prone to corrosion and has poor durability when used outdoors for long periods of time, especially in acid rain or marine environments. Therefore, since the 1970s, people have tried to use coating methods to improve the decorative properties and service life of architectural aluminum profiles. Currently, electrophoretic coating, powder coating, and fluorocarbon coating have been successfully used in industrialization. Since the electrophoretic coating is a water-based coating, the aluminum material can be directly electrophoresed after being washed by the pretreatment. The electrophoretic coating has a high transparency, and has both high decorativeness and highlights the metallic luster of the aluminum profile itself. Therefore, there are more and more aluminum profiles. Use electrophoretic equipment for painting.
Electrophoretic coating method applies to a large number of assembly line production process. Shenzhen aluminum profiles in the electrophoresis bath refresh cycle should be within 3 months. Taking an electrophoresis production line with an annual output of 300,000 steel rings as an example, the scientific management of the bath fluid is extremely important. The various parameters of the bath fluid are regularly tested, and the bath fluid is adjusted and replaced according to the test results. The parameters of the bath solution are generally measured at the following frequencies: the electrophoretic, ultrafiltrate and ultrafiltration cleaning solutions, the yin (positive) polar solution, the recirculating lotion, the pH of the deionized cleaning solution, the solids content and the conductivity once a day; Base ratio, organic solvent content, laboratory tank test twice a week. The management of the quality of the paint film by aluminum profile processing manufacturers should always check the uniformity and film thickness of the paint film. The appearance should not be pinholes, sagging, orange peel, wrinkles, etc., and regularly check the film adhesion, corrosion resistance Physical and chemical indicators such as performance. Inspection cycle according to the manufacturer's inspection standards, generally every batch needs testing. Sound-insulating energy-saving door and window technology The advantages of aluminum windows are their light weight, high strength, and resistance to wear. It is easy to form aluminum windows with complex shapes by extrusion. Aluminum profiles can be plated or coated with other surfaces to make aluminum products more durable and reduce maintenance costs.
Electrophoretic coating paint has a high utilization rate. Due to the low viscosity, the workpieces are brought out less, and the electrophoresis workpiece can be washed with water. The utilization of the recovery device makes the utilization rate of electrophoretic coating paint up to 95%. Safety and environmental protection. Because the electrophoretic coating is diluted with water, the solid content is low, and the solvent content is low, it is an environment-friendly paint, and the risk of fire is eliminated, and the health of the workers is also guaranteed. Film quality is good. Acrylic resin is cured with amino resin to ensure the high decoration and high corrosion resistance of the coating film. At the same time, because the resin is highly transparent, it effectively highlights the metal texture of the aluminum profile, and can also be decorated with matt, sand, pearl, etc. as required. effect. Compared with the conventional electrolytic coloring and sealing process, it has the advantages of time saving and labor saving, no sealing of the electrophoretic coating film, and aluminum profiles avoiding cracks and the like caused by bad sealing holes. The thickness of the coating can be freely controlled, and both the 7μm and 12μm are normally controlled at home and abroad.
The key to the development of electrophoretic coating technology is to develop aluminum profile processing technology and increase the qualification rate of electrophoretic materials. The high cost of electrophoresis profiles stems from the low pass rate. If the pass rate is less than 80%, there will be no profit or even a loss. On the contrary, there is a huge profit if the passing rate is more than 90%. Therefore, this is a key factor that restricts the development of the electrophoresis process. The high transparency of the electrophoretic paint makes the casting shrinkage shrinkage, the black, black lines, coarse crystals caused by the ash, the squeezing of the rough pattern, the scratch collision, the thick lines of the mold, the dark spots and the white spots; , markings, water marks, environmental conditions caused by dust burr, nodulation and electrophoresis process caused by low rate of penetration, yin and yang surface and high porosity of rickets are revealed, we must systematically improve the comprehensive level of aluminum processing technology.
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