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    Throughout the domestic coating industry commonly used four car-body coating technology

    Source:      2018/3/27 13:10:08      Click:

    Throughout the domestic coating industry commonly used four car-body coating technology
    1.The four elements of car coating:
    Coating material, coating process, coating equipment, painting management, they supplement each other and promote the coating process and technical progress and development. The 21st century called the new century facing environment, environmental protection has highly global attention, and has become a human most urgent Research topic. Motor vehicles and parts of automobile of coating is the highest energy consumption and most waste of one link. Therefore, reduce coating pollution and reduce coating cost,and improve coating quality,are the theme of coating  technology development.
    2.Car coating wastewater causes nature pollution
    Near ten years, coating process and equipment mainly embodies in the application of environmental protection coating materials, reduce the wastewater and waste residue emissions, reduce cost, optimize automobile production process, etc. Due to the progress of coating materials, car-body coating system design also had revolutionary advances; several typical of new coating system and new technology have or will be used in industrial production. China's current coating process and equipment overall equivalent to the Europe level of decade ago,Some enterprises in the new coating line adopt some current international advanced level of new equipment,several new car-body coating process.
    3.Automobile coating process:inverse process,second electro-coating process,integration of coating process,membrane technology.
    Inverse process:At the outer surface spray powder coatings, first for hot melt again after electrophoretic painting, and then powder/electrophoretic coating together drying and use this process, about 60 percent of the electrophoretic coating can reduce usage. Use thickness of 70μm m powder coating, the electrophoresis alternative body external surface in primer and coating, cancel intermediate coating and drying process, thus saving material and energy cost, reduce VOC emissions.
    Second electro-coating process:By using two coating material, using second electrophoresis 35 to 40μm electrophoresis (m) alternative intermediate coating. Electro-coating process automation construction stable high reliability, high qualified rate, high utilization material, less equipment investment (not need air conditioning system),So can save 48% cost, reduce maintenance frequency  and traditional coated lacquer and VOC emissions.
    Integration of coating process:Using the same color with finish paint the function layer (15μm) alternative intermediate coating function layer between with finish paint need not drying, Cancel intermediate coating line ,improve production efficiency at the same time, sharply reduced VOC emissions.
    Membrane technology is a kind of prefabricated suitable for hot forming face paint film by hot forming, the topcoat product performance and appearance and traditional baking spraying coating very similar. This technology is mainly applied to plastic production,Use "clip content moulded" or "internal model" process will precast good composite coating in the plastic pouring forming and finish at the same time forming is a plastic melt,Get the coating covering without defect. The body frame by traditional stamping welding technology manufacturing,Coating workshop for only the body frame for painting,topcoat paint uses powder spraying technology. Because the body frame exposed area is lesser, so topcoat color and covering are no need the  same color, depth and shallow each can be  one color. Large areas of covering parts are using the  plastic articles adopted fu membrane technology thousands of color. This greatly simplifies the car-body in reducing coating, coating processes at the same time, makes the cost of  the VOC emissions coating around 7g/m2, is far less than the European emissions requirment.