Spray Painting Technology Features and Application of Automatic Painting Equipment

The substrate material is not limited, can be metal and non-metal, can be sprayed on a variety of substrate materials sprayable coating material is extremely wide, thermal spraying technology can be used to spray almost all solid engineering materials, such as carbide, ceramics, Metal, graphite, etc.; temperature rise of substrate material during spraying process is small, no stress and deformation are generated; operation process is flexible and convenient, is not limited by the shape of the workpiece, and construction is convenient; coating thickness can be from 0.01 to several millimeters; coating performance is varied and diverse , Can form wear-resisting, corrosion resistance, heat insulation, oxidation resistance, insulation, conductivity, radiation protection and other coatings with various special features; strong adaptability and good economic benefits. . Whitening, low temperature easy to form substrate surface water vapor, relative humidity> 85 °%, plate moisture content> 12% will be white. Solution:

1. Add 3-10 white water to the diluent and mix well. After the water on the surface of the substrate is dried with a dry towel, apply it. When the wet-on-wet process is applied, extend the recoating time. The recoating time should not be less. No more than 2 hours in 60 minutes, and at most one wet wet-on-wet process can be performed. After the paint film is completely dry, it must be ground and then re-applied; after water-milling, it must be dried for 12 hours before recoating; Must be closed again with bottom dew, can effectively block the moisture in the sheet into the film;


4. Pinholes, air bubbles, deep wooden eyes on the surface of the wood, poorly-sealed paint, slow drying, and easy formation of pinholes from the wooden eyes; deep wood eyeholes contain air, and the paint penetrates through the air to create paint film bubbles. Solution: After the plate is purchased, it must be closed again with bottom depot, which can effectively prevent the paint from sinking and form pinholes. At the same time, Dedebo can penetrate the strong air to solve the film bubble.


5. If water polishing is required, the surface of the board must be completely dry (48 hours in summer and 96 hours in winter) before polishing. Otherwise, the paint film will not get the desired effect. The construction temperature of the wall surface latex paint is less than 5°C. The phenomenon of paint failure caused by slow drying when painting the wooden paint in a warm environment is as follows: dripping, slow-drying or non-drying, back sticking, bottoming, wrinkling, whitening, Pinholes, air bubbles. When the windy and foggy weather occurred, the temperature was <5° and the relative humidity was >85°. Sagging----The coating is dripping due to slow-drying at low temperature, and the thickness of the paint film is not uniform.


Solution: Use winter thinner to speed up the speed of paint drying; do not thick-coat, should be painted twice or more; extend the recoating time, wait until the paint is completely dry and then apply the next coat of paint; A little thinner to increase paint viscosity. Slow drying or non-drying, sticking back, biting bottom, wrinkling, low temperature, solvent can not be completely evaporated out, resulting in poor curing of the paint film. Solution: use winter thinner to speed up the speed of paint drying; increase the proportion of coating equipment paint curing agent (increase within 20%, otherwise the film becomes brittle), prompt the film to cure fast; ensure good ventilation, Let the solvent method thoroughly evaporate to prevent stickiness; extend the recoating time, wait until the paint on the road is completely dry and then apply the paint under the paint; so as to prevent the thinner from dissolving the paint on the road when the paint on the road is not cured Bottom, wrinkled. Relative humidity> 85 °%, requiring oil workers to stop construction, otherwise it will cause powdering, film loss, water shadow and other phenomena due to poor film formation

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