Chemical coating machine replaces vacuum coating machine
Now the coating industry is widely used. The coating industry includes: hard coating (application knife mold), protective coating, optical film, architectural glass coating, solar thermal, solar cell, integrated circuit, information display device (liquid crystal, etc.), decoration Coating, etc. The coating industry is divided into many categories. The vacuum winding coating equipment as an emerging industry in the coating industry is more green and environmentally friendly than chemical coating, and there is no pollution. It will definitely replace chemical coating.
Let ’s first talk about the working principle of vacuum coating equipment. Vacuum coating is under vacuum conditions, using low voltage and high current arc discharge technology, using gas discharge technology, using other discharges to evaporate the target and make the evaporated material and gas All ionization occurs, and the acceleration of the electric field is used to deposit the evaporated material and the reaction product on the workpiece. Common vacuum winding coating equipment can be divided into: evaporation winding coating, magnetron sputtering winding coating and combined winding coating according to its working principle.
There are two main production methods in the coating industry today, one is chemical meteorological deposition, one is chemical plating (CVD), and the other is physical meteorological deposition, which is vacuum coating (PVD).
Chemical coating is the process of introducing gaseous reagents or other gases required for liquid reaction into the reaction chamber to form a thin film. In the process of chemical thin film, it is easy to produce solution pollution. If there are many impurities on the surface of the plating layer, the plating effect is not good.
The reaction temperature required for chemical coating is very high, generally controlled at about 1000 ℃, but many substrate materials can not withstand this high temperature, and cemented carbide in time, although it can withstand high temperatures, but in the environment of chemical coating production due to high temperature will also cause The grains are coarse, causing a brittle phase, and the performance deteriorates. If TiN is plated on cemented carbide, the carbon diffused from the crystal will react with the solution to form a decarburized layer, which has poor toughness and low bending strength, resulting in a shortened tool life.
Vacuum winding coating equipment can solve a series of problems caused by chemical coating. All coating materials are deposited on the surface of the workpiece by plasma in a vacuum environment, which solves the problem of solution pollution in the chemical plating film, and does not produce toxic or polluting substances. The plated film has higher hardness, wear resistance and corrosion Good, performance is more stable. The application of vacuum coating has aroused great attention from the manufacturing industries of all countries in the world. It has no pollution to the environment, is in line with the development direction of modern green manufacturing, and is in line with the world's environmental protection theme. Therefore, the chemical coating is gradually replaced by vacuum winding coating.
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