At present, the mahogany door enterprises are not very perfect in the drying problem, and the drying effect may be better in the summer. However, in the winter, the air is humid and cold, and the mahogany door begins to "get sick", and various small problems appear one after another. But as long as the following points are made, the problem is not as terrible as we think. Three ways to dry redwood doors Conventional drying method The conventional drying method is a convection heating drying method using damp hot air as a drying medium, and has many structural forms, and is the most widely used method for drying wood in wood processing enterprises. It has many heating methods (can be divided into conventional steam, hot water drying and conventional furnace gas drying); the volume of the filling material varies widely (small cubic meters, large hundreds of cubic meters), which can meet Various production requirements; drying process is easy to master and control. As analyzed in the previous section, most mahogany products manufacturers have small annual wood processing, tree species, and plate specifications. Therefore, the kiln body with a volume of 15 to 25 m3 is selected, and the furnace kiln is selected to be fan-type. The steam and hot water kiln are better to choose the overhead fan type. The air circulation in the small kiln material pile is more uniform, and the difference in temperature and humidity is small, which can meet the production demand and achieve better drying quality. Vacuum drying method The vacuum drying method is also widely used at home and abroad. The vacuum kiln body is a cylindrical metal structure with good compression and sealing properties. The drying principle is to use the degree of vacuum in the tank to lower the boiling point of water and accelerate the movement speed of moisture in the wood, thereby increasing the drying speed and shortening the drying time. Therefore, when the vacuum drying method is selected, the drying temperature is low, and the drying defects such as cracks and shrinkage of the wood can be reduced or avoided. The vacuum drying method is more suitable for drying hard hardwood thick slabs, and it has a good drying effect on hardwoods with good permeability. Air drying and conventional joint drying Air drying is atmospheric drying, its drying cost is low, the correct air drying in the high moisture content drying stage of wood, it is not easy to produce dry quality problems, the drying speed is also acceptable, and the wood moisture content is lower than the fiber saturation point (FSP When the drying speed is too slow. If the air-dried semi-dry material is dried by conventional drying, the kiln drying time can be significantly shortened. The air-dried wood board is very flat and does not suffer from surface hardening, cracking and shrinkage. Air drying and conventional combined drying are also effective methods to improve the quality of wood drying and reduce drying costs. Air drying is easy to implement. After the air drying is completed, the wood is loaded into the conventional drying kiln, which can greatly improve work efficiency, save time, reduce costs, and achieve better economic benefits. In general, due to the rapid development and large scale of the mahogany door enterprises, the wood drying technology is relatively backward overall, the development speed is slow, and the drying capacity is insufficient. Many enterprises have original methods of drying, causing serious loss of precious wood, and wasting wood resources. Individual enterprises have cut corners and made wooden doors without drying. I hope that the mahogany enterprises can face these existing problems and actively solve the problems, so that this road will be smooth sailing. [ Tips: More door and window news, investment agents, business opportunities, please pay attention to "Jiuzheng Door Network" (Official WeChat) or @ä¹æ£é—¨çª—网 (official Weibo) to learn more industry information. 】
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