Several tips for water-based paint spraying construction

Spraying method is one of the most important methods of water-based coating construction, using spraying method to coat the surface of objects, you can obtain a thin and uniform coating film, for different geometric shapes, there are small holes, gaps, uneven uneven places, coatings can be evenly distributed. For large surfaces, spraying is faster and more efficient than painting brushes. Today, China Coatings online

small editor to give you an inventory of water-based paint spraying construction of several tips and key points.
dry goods: water-based paint spraying construction of several tips and
1. Use clean water to adjust the coating to the appropriate spray viscosity, to apply 4 viscosity meter measurement, the appropriate viscosity is generally 20-30 seconds. If there is no viscosity meter for a while, you can use visual method: with a rod (iron rod or wooden stick) to stir the paint to 20 cm high to stop observation, such as paint liquid in a short period of time (seconds) constantly line, it is too thick;
2. Air pressure is best controlled at 0.3-0.4 megapa (3-4 kg force/cm2). The pressure is too small, the lacquer liquid atomizes badly, the surface will form a numbing point. Too much pressure is easy to hang, and paint fog is too large, both waste of materials and affect the health of operators.
3. The order of spraying is: first difficult, then easy, first in and out. First high and then low, first small area and then large area. This will not cause the sprayed paint mist to splash on the sprayed paint film, destroying the sprayed paint film.
4. The distance between the nozzle and the surface is generally 300-400 mm as appropriate, too near easy to hang, too far paint fog is not uniform, easy to appear numb spots, and the nozzle far away from the surface paint fog in the way to disperse caused waste. The specific size of the distance should be adjusted according to the type of coating, viscosity and the size of the air pressure. Slow dry paint spray distance can be a little farther, quick dry paint spray, can be closer. When the viscosity is thick, the viscosity can be a little farther, when the air pressure is high, the distance can be a little farther, the pressure hour can be closer. The so-called closer point refers to a small range of adjustment between 10 mm - 50 mm, if beyond this range, it is difficult to obtain the ideal paint film.
5. Spray gun can be used up and down, left and right movement, it is best to 10-12 meters / minute speed even operation, nozzle to be straight on the surface spray, to minimize oblique spraying. When sprayed to both ends of the surface, the hand of the trigger to quickly loosen, so that the paint fog is reduced, because the two ends of the surface, often to accept more than two spray, is the easiest place to cause hanging.
6. When spraying, the next one should be pressed 1/3 or 1/4 of the last one, so that there will be no leakage phenomenon. When spraying fast dry paint, it needs to be sprayed sequentially at once, and the resaling effect is not ideal.
7. When spraying in an open outdoor place, pay attention to the wind direction (not suitable for operation when high winds), the operator should stand in the direction of the wind, to prevent the paint mist from being blown to the sprayed paint film caused by ugly grainy surface.
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