Experts teach you how to choose and maintain wooden doors correctly
Wooden door paint process
The paint is used as a post-process for the processing of wooden door factories. Its advantages and disadvantages directly affect the final use effect. At the same time, the paint cost is also one of the largest parts of the wooden door.
The types of paint are roughly divided into phenolic paint, alkyd paint, polyurethane paint, nitro paint, polyester paint, and PU paint. Among them, phenolic paints and alkyd paints are basically eliminated during the decoration due to poor texture and adhesion of paint films, and a large number of urethane paints, polyester paints, and PU paints used on high-grade furniture are used in large quantities.
Nitro-lacquer is relatively simple to use and suitable for manual operation. It is used by most hand-decorated woods. However, the paint film is thin and feels bad. The effect is not ideal. Polyester paint is relatively thick, but its diluent contains helium when it is volatilized, and its hardness is slightly weaker. The most ideal is PU lacquer. PU lacquer not only has thick and thick film of polyester paint, strong adhesion and good transparency. At the same time, its good sealing performance also plays a very important role in wood moisture protection. Hardness, durability, yellowing resistance and environmental protection are also unmatched by other paints.
Due to the cost (nitrogen lacquer 8-15 yuan / kg, polyester paint 18-28 yuan / kg, PU lacquer 43--65 yuan / kg), processing methods and equipment, currently on the market 90% of the use of wooden doors Polyester paint, a few manufacturers use PU paint. In general, polyester paint and PU paint have to look for color, three steps and two sides and other six processes, some brands increase the curing and waxing process.
Therefore, in the selection of wooden doors, paint is one of the factors that must be considered. It directly affects the texture, feel, moisture, environmental protection, durability, resistance to yellowing and other issues.
Why are wooden doors easily deformed
Due to the use of wood processing, the wooden door has a large flat surface area and a small number of fixed points, so it is one of the decorative woods that are most susceptible to deformation and cracking. Because the deformed wooden door will directly lead to the sound insulation, airtightness and aesthetics of the house, understanding the cause of the deformation of the wooden door becomes a particularly important decorative knowledge before decoration.
Natural wood has various factors in the growth process, resulting in uneven density of wood (sunny surface, annual density, core material and sapwood). When the wood is being planed, it changes the balance of internal stress, Deformation and cracking of wood.
The high moisture content of wood is also another main reason leading to the deformation of the wooden door. With the decrease of the moisture content during use, the internal stress of the wood will gradually be revealed, eventually leading to deformation and cracking.
The main method to prevent wood deformation is to use mechanical and technical methods to change the internal stress and moisture content of the wood. The most effective and common method to change the internal stress is to finger joints of pine wood or Chinese fir (smaller stress in these two kinds of wood). . The method of changing the wood moisture content is to perform secondary drying (natural drying followed by steam drying). The quality of processing in the production of wooden doors, such as the pressure, temperature, balance layer, glue and other factors of the press, will directly affect the deformation and cracking of the wooden door during use.
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Industrial applications editor broadcast
Whetstone sintered corundum (ruby) : A kind of microcrystalline corundum product sintered at high temperature. It has a compact and delicate structure and high hardness and strength.
The products are rosy red. The products are small grinding wheel type whetstone, standard type whetstone and grinding head type whetstone. When grinding the workpiece, it can maintain sharp edge and stable geometry for a long time.
It is suitable for forming and grinding of instrument industry, precision parts, micro cutting tools, tools and precision abrasive tools, etc. The precision surface roughness of machining can reach about 0.05μm.
Product SPECIFICATIONS: flat sand wheel whetstone with diameter less than 100 for small grinding wheel type, whetstone with various geometric shapes less than 200*50*25 for standard type, whetstone with diameter less than 25 for grinding head type.
Grinding method
About diamond grinding paste, particle size from W40 to W0.5. W40 is the coarsest, with a large amount of grinding, and W0.5 is the smallest. It is used for polishing, and it does not anneal, and it can also grind the hard knife.
Method of use:
The coarse W40 abrasive paste applied to borotartar can accelerate and increase the grinding amount without annealing.
Then, AFTER the rough grinding paste on the knife is cleaned, W0.5 grinding paste is applied to the ruby or natural jade for polishing, and the effect thrown out is a mirror.
Green silicon carbide, white corundum, brown corundum of these three kinds of whetstone hardness is not enough, coupled with a little coarse particle size, easy to grind out the cross, and the other three kinds of whetstone in polishing, grinding will not annealing.
If the particle size is greater than 1000, there is no difference. It mainly depends on the grinding paste used. When the grinding paste of W1.5 is applied to the ruby with 1000 mesh, its grinding effect is the effect of the grinding paste of W1.5, that is, the effect of the whetstone with 2500 particle size
Grinding Stone,Diamond Grinding Pellets,Carborundum Oil Stone,Oilstone Sharpening Stone
Henan Jinlun Superhard Material Co., Ltd , https://www.jinlunsuperhard.com