Analysis of the pros and cons of the three methods of surface treatment of aluminum profiles
The surface treatment methods of aluminum profiles generally have three treatment methods: anodizing, electrophoretic coating and powder spraying, each of which has its own advantages and has a considerable market share.
powder coating has the following significant advantages:
1. The process is relatively simple, mainly due to the improvement of the automatic precision of the main equipment in the production process, and the microcomputer control of some main technical parameters can be realized, which effectively reduces the difficulty of process operation, and at the same time, the auxiliary equipment is greatly reduced;
2. The yield rate is high. Under normal circumstances, if various measures are appropriate, the production of nonconforming products can be controlled to the greatest extent;
3. The energy consumption is significantly reduced. In the production process of ordinary anodizing and electrophoretic coating, the consumption of water and electricity is quite large, especially in the oxidation process. The output current of the rectifier can reach between 8000~11000A, and the voltage is between 15~17.5V. In addition to the heat consumption of the machine itself, it needs to be continuously cooled with circulating water, and the electricity consumption per ton is often about 1000 degrees. At the same time, the reduction of auxiliary facilities can also reduce some power consumption;
4. The degree of pollution to water and atmosphere is reduced. Caustic soda, sulfuric acid and other liquid organic solvents are no longer used, which reduces water and air pollution and effectively improves the competitiveness of aluminum profiles and plastic steel profiles as environmentally friendly products. Reduced some production costs;
5. The labor intensity of workers is significantly reduced. Due to the use of automated assembly line operations, the feeding method and the use of fixtures have been significantly simplified, which improves production efficiency and reduces labor intensity;
6. The surface quality requirements of the wool have been significantly reduced. The powder coating can completely cover the extrusion lines on the surface of the profile, conceal some of the defects on the surface of the aluminum profile, and improve the surface quality of the finished aluminum profile;
7. Compared with other surface treatment films, some physical indexes of the coating film are significantly improved, such as hardness and wear resistance, which can effectively extend the service life of aluminum profiles.
Powder spraying uses powder coatings. Electrostatic spraying is used in the process. The friction spray gun is used to make the powder particles carry a positive charge when they are sprayed from the gun body and contact the negatively charged profile. Electrostatic adsorption, then high temperature curing. It also enhances the adsorption strength of the paint and prevents the paint film from falling off.
From the perspective of the process itself, it has a fairly high technological composition, and the deployment of paints of different colors to produce decorative effects of different colors is more in line with the needs of interior decoration, and it is also in line with the trend of aluminum profiles in the construction industry to develop indoors. Consistent. In particular, the combined use of sprayed profiles and thermally insulated bridges makes it more fashionable and gives powder sprayed profiles more room for development, which cannot be replaced by profiles produced by other processing methods.
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