With the development of science and technology and the continuous growth of the national economy and people's living standards, there are more and more requirements and needs for various electrical products with multiple functions and high quality. The coating of electrical products should adapt to the development requirements of domestic and foreign market competition and the expansion of demand.
1. Technical characteristics of electrical product coating
There are many electrical products and their components, and the amount of coating is large. There are various requirements for coating performance and quality, and there are many types and varieties of coatings used. In order to meet the requirements of the coating quality of electrical products and the use of environmental conditions, it is almost the culmination of modern coating methods. Product coating has many technical characteristics, which are summarized as follows:
1) Electrical performance requirements: Most of the coatings of various electrical products must meet the electrical performance requirements. Such as insulation, heat resistance, arc resistance, spark breakdown resistance, wear resistance, moisture resistance and mildew resistance, etc.
2) Protection: The environmental conditions of electrical products after painting are various, so the surface of the product needs to be protected. The surface coating should be resistant to chemicals, solvents and various corrosive media, and it should also have three-proof performance. Depending on the degree of protection required, the coatings to be used, the thickness of the coating, and the performance requirements are also different. It should vary according to the environmental conditions in which the product is used.
3) Decorativeness: The decorativeness required for the coating of electrical products varies from high to low. High decorativeness requires bright colors, fullness and brightness, and smoothness. The surface decoration of various electric control cabinets should be coordinated and soft in hue and brightness.
4) Excellent mechanical properties: Coatings for electrical products are generally required to have excellent mechanical properties. The coating should be tough, wear-resistant, impact-resistant, collision-resistant and other mechanical and man-made damage, and the coating should have excellent adhesion to the product surface. Due to the harsh environmental conditions of some products, such as insufficient hardness and strength of the coating, the service life of the product will be greatly reduced.
5) Mechanized and automated coating production: Mechanized and automated assembly lines for coating production in the electrical industry are very common, because the amount of coating of electrical products is large. And the shape, size and batch of most products are qualified for automatic flow coating. The new equipment and new technology of modern coating production are widely used, and the technical and economic benefits of coating are relatively high. The introduction, digestion and absorption of foreign professional coating technology has made rapid progress in the electrical industry. The development trend of modern coating technology, which is effective, low consumption, energy saving, reducing or eliminating environmental pollution, and improving working conditions in coating production, has been prominently reflected in the coating of electrical products, and will soon spread throughout the entire machinery industry .
2. Varieties of coatings required for electrical products
There are many types and varieties of coatings used in the coating production of electrical products, including solvent-based varieties, electrophoresis and powder coatings, and many art-type coatings.
3. Coating process of electrical products
At present, most of them are mechanized and automated flowing water coating production. There are main process methods such as manual automatic line spraying, electrophoresis, electrostatic spraying and powder electrostatic spraying.
Source: Mechanical Industry Press "Intermediate Coating Technology"
