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Introduction:
the gradual development of private cars more and more in our line of sight, in China's family car purchase has become the world's first. Due to the rapid development of the automotive industry, the development of the automotive coating process and the automotive coating industry has been greatly promoted.
With the continuous mining and use of national resources, available energy has been very few, in this case, if resources can not be used very well, one day our earth will no longer provide energy for human use, in this environment, energy conservation and emission reduction, to avoid environmental pollution has become the core goal of social development
in the automotive coating industry is no exception, automotive coating process in the premise of ensuring quality, and constantly towards good quality, low-cost direction, committed to the direction of ecological savings development. Based on automobile coating, this paper describes the overview of the advantages of water-based neutral coating process, the process design of water-based neutral coating process, the development of new materials, the requirements of process equipment for water-based neutral coating process, and the evaluation of the appearance of water-based neutral coating process.
Water-free medium coating process advantages of the overview
water-based medium coating process this technology is the latest research and development of the automotive coating industry, compared with traditional technology, water-based mid-coating process in ensuring the proper quality, for the cancellation of the middle way, the original high-quality things, put into other component systems, the implementation of this technology, to a large extent reduce the use of coatings, reduce the running energy consumption while reducing the emissions of harmful substances to the air, the elimination of a series of facilities used to do halfway.
The significance of such implementation is to reduce the time of implementation of coating technology, save some of the equipment funds, so that the workshop can be applied to a larger area, can also reduce the half-way part of the resources, so that resources can be more effectively used, this advantage, promote the water-free coating process has become one of the most potential technologies in the automotive coating industry.
the process design of the water-free medium coating process
3.1 the operation process of the water-based water-free mid-painting process
in the design of the water-based water-free medium coating process, the new B1B2 is used to replace the original midway and color paint, In order to reduce the loss of energy, the process is, pre-construction treatment, electrophoresis, drying, polishing, sealing, drying glue, coating B1, B2, B2 external surface spraying, drying, painting varnish, drying.
3.2 Conditions required for water-free mid-painting process spraying
temperatures need to be between 23-26 degrees Celsius and humidity between 60 and 70 percent;
wind speeds in the manual segment are between 0.25-0.35 meters per second, and no spraying is between 0.4-0.5 meters per second;
The temperature of the flash drying process should be kept between 60-80 degrees Celsius, the temperature of the insulation zone should be controlled between 80-90 degrees Celsius,
additional spraying equipment also has high requirements, the outer surface spraying should use the robot spraying method, so as to effectively avoid uneven artificial spraying.
3.3 Compared to the outstanding advantages of traditional processes
Water-free medium coating process relative to traditional processes, coating consumption accounted for 80 percent of the original process, energy consumption accounted for 70 percent, VOC emissions accounted for 10 percent Sixty-eight, in environmental protection, carbon dioxide emissions reduced by 10-15 percent, reduce waste by about 25 percent, there are many such as paint, membrane and other energy reduction, are water-free coating process this new technology significant advantages.
the development of new materials
water-free medium coating process compared to the traditional process, the removal of the mid-course system, in terms of performance inspection, mainly wrote two points. One is roughness, and the other B1 layer is UV resistant. The result of the first point is that the appearance of the water-free medium coating process requires very strict quality, requires that the surface of the electrophoresis layer does not have any defects, and the roughness is less than or equal to the full area of 0.25.
process equipment requirements
5.1 air conditioning system
Air conditioning exhaust system in water-free mid-painting process is an indispensable step in the coating production line, this system Not only can the working environment be very good improvement can also provide better production conditions and can guarantee the temperature and humidity of the workshop, it has a very critical role in the quality of spraying, its use of good or bad, seriously affecting the final results of the operation, as well as the later use of equipment commissioning and production.
5.2 Dryer
water-using dryer plays an irreplaceable role in the completion of the new process. Because the wet film thickness of the new process is much thicker than the original, the drying process will take a long time than the original process, fast drying, refers to the new process will lead to quality problems, in order to save drying time, the original drying system has been unable to meet the needs of the new process, so it is necessary to study a new set of drying technology.
After continuous research and exploration by technical personnel, the new process of the public dry process time has been greatly reduced, the body wet film moisture has been almost completely dry, the temperature of the car itself will be controlled below 35 degrees, to ensure the next process time. This brief introduction to the two water-free medium coating process construction technology, and many more procedures have been correspondingly improved.
water-free mid-painting process appearance evaluation
water-free mid-painting process in the body after the implementation of the effect, is very high-quality, not only good appearance, in the car's parameters testing process, but also can meet the requirements of the current car process on the appearance, can be seen in long-term practice.
For the same automotive substrate, the use of water-based non-medium coating process new technology, can make the car film more high-quality, compared to the traditional car coating process, more high-quality than the traditional process, which is the outstanding advantage of the new process.the implementation of the
Excillation
automotive water-free medium coating process, which has played an experable role for China's automotive coating industry, fully fill the gaps in China's automotive coating industry energy conservation, reduce pollution, for the future automotive coating field, added valuable experience and provided research value.
At present, the automotive water-free coating process in China is still in the trial operation stage, because the paint used in the early stage is not domestic, so the value is higher than domestic, in the short term will increase the cost of use, but with the continuous development of China's science and technology, the level of technology continues to improve, in the near future Water-free medium coating process will certainly be replaced by domestic production of materials, the cost will be low, so that water-based water-free medium coating process to become all car owners can afford the mass technology, from this point of view, water-free medium coating process will certainly become One of the most potential technologies in China's automotive coating industry.