For the modern painting line, it can generally meet the requirements of constant temperature, constant humidity and clean air (air dust content < 10mg/m3); but for the simpler production line, it is difficult to guarantee constant temperature, constant humidity and clean air, so that the painting workpiece can not achieve satisfactory painting effect, and the film can easily produce pinhole (shrinkage). In order to avoid pinholes and orange peel, the temperature and humidity in the spraying room should be improved to meet the technological requirements. Secondly, the viscosity and diluent composition of the coating should be adjusted according to different temperature and humidity. Generally, it is necessary in the spraying process. The temperature and humidity of the spraying chamber are controlled below 35 C and 80% respectively.
China's painting production line equipment has been developing continuously since the 1970s, especially after the reform and opening up, but it is basically in a "spontaneous" state. Domestic painting equipment also does not meet the market demand. Many key spraying equipment is still imported. It is estimated that at present there are more than thousands of painting production lines in our country, and hundreds of new production lines will be invested every year. The annual investment of the whole country is about 1 billion RMB, and
Application Principle of Electrophoretic Pickling Solution
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