Common knowledge of coating: precautions for spraying operation of furniture wooden door

Core tip: when coating by spraying method, the paint flows out from the head above the spraying machine and falls down to form a continuous and complete paint curtain The workpiece is fed by the conveyor Through the paint curtain under the head, the surface is coated When the feed speed of the workpiece is stable, the paint curtain is continuous and uniform, the coating with uniform thickness can be obtained This method is widely used in the production of wooden door products Among all kinds of coating methods, the coating efficiency of spray coating is the highest In order to obtain good finishing quality, we must pay attention to the control of various process conditions, including: 1 Paint viscosity The viscosity range of coating suitable for spray coating is large, Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Paint Home News: when coating by spraying method, the paint flows out from the head above the paint spraying machine and falls to form a continuous and complete paint curtain The workpiece is fed by the transmission device Through the paint curtain under the head, the surface is coated When the feed speed of the workpiece is stable, the paint curtain is continuous and uniform, the coating with uniform thickness can be obtained This method is widely used in the production of wooden door products Among all kinds of coating methods, the coating efficiency of spray coating is the highest In order to obtain a good coating quality, we must pay attention to the control of the process conditions, including: 1 The viscosity of the coating is suitable for spraying, the viscosity range of the coating is large, 15 ~ 130s (coating 4) viscosity of the coating can be spraying Using as high viscosity as possible can save the diluent of the coating, reduce the number of finishing, and prevent the coating from overflowing from the edge of the workpiece But the viscosity is too high, and the leveling of the coating is poor, which affects the film quality In production practice, the viscosity of coating is mostly 25 ~ 50, (tu-4) In order to solve the problem of poor leveling of high viscosity coating, foreign wood products usually preheat the surface of workpiece before coating to improve the leveling of coating 2 Speed of conveyor belt: the faster the workpiece is fed into the paint spraying machine, the higher the coating efficiency However, the amount of coating should be reduced If the speed is too fast, the paint film may be discontinuous The conveyor belt speed is generally 70-90m / min, which is suitable for the bottom seam curtain type coating machine 3 The wider the bottom seam is, the larger the paint flow and the thicker the coating is However, the width of the bottom seam should not be too wide Generally, the width is 0.2 ~ 1mm The distance between the head and the workpiece surface should not be too large, generally about 100mm Several factors are related to each other In the spray coating construction, the reasonable process parameters should be determined through the test in combination with the specific coating and preparation conditions In the process of coating, we should pay attention to the change of viscosity of coating and adjust it in time To remove the paint in the circulation of air entrainment in the formation of bubbles and mixed dust and impurities At the end of spraying, the residual paint in the paint box shall be discharged first, and a certain amount of diluent shall be put in it, then the paint spraying machine shall be started, the head and the whole circulation system shall be cleaned, and then the interior of the head shall be wiped clean In strict accordance with the technical procedures and correct operation, spray coating method can obtain high-quality paint film The production capacity of the paint spraying machine is very high, and it is also convenient to form a coating line In addition to solvent volatilization and equipment cleaning, there is no paint mist and little paint loss Compared with spraying, the pollution to environment and power consumption for ventilation are less Therefore, for mass production, drenching is an advanced finishing method Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,