The application of powder coating spraying method in the application of industrial aluminum surface treatment after a period of low development, after a few years in comparison with other methods of treatment, some of the advantages have been widely recognized in the industry, become the current domestic industrial aluminum surface treatment One of the hotspots is also a project that many new and old aluminum extrusions manufacturers compete to introduce. By comparing the production process with other processing methods, powder coating spraying has the following advantages.

      (1) The processing technology is simple and the labor intensity is low. Some of the main technical parameters can already be achieved by microcomputer control, effectively reducing the difficulty of process operation, and at the same time greatly reducing the number of auxiliary equipment; due to the use of automated assembly line operations, the feeding method and the use of fixtures have been used. It is significantly simplified, improving production efficiency and reducing labor intensity.

      (2) High rate of finished products If all the measures are in place, the production of non-conforming products can be controlled to the greatest extent; the surface quality requirements for wool are significantly reduced. The powder coating can cover the extrusion pattern on the surface of the profile, masking the flaws on the surface of a part of the industrial aluminum profile, and improving the surface quality of the finished aluminum profile.

(3) Significant reduction in energy consumption In the production of anodizing and electrophoretic coating, the consumption of water and electricity is considerable, especially in the oxidation process. Rectifier output current can reach 8000-11000A, the voltage is 15-17.5V, plus the heat loss of the machine itself, need to constantly use cooling water to cool, ton power consumption is often around 1000kW.h.

      (4) The use of alkali, sulfuric acid, and other fluid organic solvents is no longer used to reduce the pollution of water and air, reducing water and air pollution, and effectively increasing the competitive strength of industrial aluminum profiles and plastic steel profiles as environmentally friendly products, correspondingly reducing Some production costs.

      (5) Some physical indexes of the coating film are significantly improved compared with other surface treatment films such as hardness, wear resistance and acid resistance, which can effectively prolong the service life of industrial aluminum profiles. The powder spray coating of profiles is combined with thermal transfer technology to make it more fashionable and powder sprayed profiles have more room for development.

       Aluminum anodizing technology surface treatment is to use a wide and mature technology, with the development of powder coating electrostatic spraying technology, China's aluminum coating electrostatic coating market share is close to the proportion of anodizing technology, electrostatic spraying technology with its rich colors, With the advantages of bright color, less coating and material, good resistance to atmospheric corrosion, easy operation of spraying technology, reduced pollution, and good ecological environment, the scope of application is continuously expanding and the market share continues to increase. The electrostatic powder coating and anodizing coloring properties are shown in Table 1-1.

       The outstanding advantages of electrostatic powder coating and anodic oxidation method are the repeatability and controllability of color, few defects caused by process factors, and good environmental benefits. Compared with the anodized film, the electrostatic powder coating has the outstanding advantages of rich and colorful colors, partial damage can be repaired, the aluminum curved coating does not crack, and the heat-resistant atmosphere and cement slurry are excellent in corrosion resistance. These advantages precisely meet the special requirements of color and styling in contemporary architecture and bustling business districts. With the improvement of powder coating performance and cost reduction, the static powder coating process is rapidly promoted on industrial aluminum profiles to become anodized aluminum profiles. France's strong opponent.