Requirements for sanding operations in the production process of water-based paint coating of wooden furniture

In recent years, with the advance of oil-to-water environmental protection storm, water-based paint has developed rapidly and has been adopted by more and more furniture enterprises. Sanding play a decisive role in the coating effect of furniture. Do a good job of sand, that is, can present excellent products, but also improve production efficiency, the benefits will

. Visible sand is a link that can not be ignored in furniture production. Today, we will discuss the requirements of sanding operations in the production process of water-based paint coating of wooden furniture.
the watery lacquer sand has anything to pay attention to?
will be analyzed in two sections below:
white body material sand and paint film sand. By contrast, you'll find many differences from oily lacquer sand.
1White body sand before coating<<<
that is, the initial sand of the material, used for hairshots or oil, so that the surface of the work parts flat, smooth, usually using semi-automatic or fully automatic mechanical sanding equipment plus manual sand inspection completed. The white sanding requirements of furniture work pieces are more refined than oily paint when making water-based paint coating.
the key points of
1. The sanding of sandpaper, which needs to be sanded with 240 or 320 or 400, improves the fineness of the grinding and helps to reduce the problem of ribs and perforation of the substrate.
2. The equipment can not sand to the corner and other parts of the follow-up need to be manual sand inspection treatment.
(1) when there is a minor bruise on the part of the work part, hot water can be used to moisten the wound, after expansion with the iron heating air-drying treatment, as far as possible to restore the original plane and then sand;
(2) when the corners and corners of the sandwork, to master the technology to prevent sand deformation,
(3) outer arc and inner bow type of work piece sand, you can use custom molds or use a moderate hardness sponge, air drum sand.
2The lacquer film <<<
the lacquer film sand is designed to smooth the coating surface and enhance inter-layer adhesion. At the same time deal with the white body and primer coating process between the production of quality defects. Because the thickness of each layer of water-like paint is thinner than oily, the application of film sand than oily paint requirements are higher, the operation must pay attention to the following things!
the key points of
1. Material handler sanding: with vegetable melon cloth or 400 s sandpaper, sand removal work surface wood or particles;
2. Head-level primer sand: with 400 s sandpaper, sand removal work surface wood or particles, so that the surface is flat, increase the adhesion between the paint layers;
3. Second-degree primer sand: with 400 spaper, remove oil slag or particles, paint sand requires flat, enhance the adhesion between paint layers;
4. Last primer: with 600 x sandpaper, remove oil slag or particles, paint sand requires flatness, enhances inter-paint adhesion, pay attention to check paint film defects and treatment, in preparation for paint construction.
5. The primer sand selects alumina sandpaper with zinc stingrate added, which can drain chips well and get good sanding effect.
6. The primer sand selected sandpaper pan, the finer the sand grain, the finer the grinding, the less easy it is to sand through the coating.
7. When sanding in the direction of wood grain, along the shape of the work piece to sand, the more difficult to appear sand marks, sand concave, sand deformation and other phenomena, the following image of the wrong operation of the resulting bad products.
After understanding the main points of sanding, how do we choose the appropriate sanding method according to the shape of the furniture, make reasonable use of the various functions of the sanding tool, master the technical characteristics, is an effective way to reduce production costs, increase productivity, improve the effect of furniture coating.