What is the drying process of furniture board
Before producing furniture boards, manufacturers must do a good job of drying the raw materials. The drying of raw materials is to remove the free water and absorbed water in the wood to adapt to different uses and quality requirements.
Although there are many drying methods for wood, the basic principle is the same, that is, the moisture content gradient along the thickness of the wood and the difference in partial pressure of water vapor between the inside and the outside formed after heating are used to promote the moisture content. The two forms of liquid and vapor continuously move from the inside to the outside, and evaporate to the outside through the surface of the wood. The intensity of the internal water movement should be in harmony with the water evaporation intensity of the surface, so that the wood can be balanced from the surface to the inside. Dry.
The steam drying chamber is traditionally used, and its drying process is to make high-temperature and high-temperature moist air continuously pass through the pile of wood in a circulating flow to preheat the wood. When the wood and its moisture are heated to a certain extent, , according to the provisions of the drying benchmark, reduce the temperature and relative humidity of the medium, forcing the moisture in the wood to evaporate from the surface, which is the beginning of drying; then according to the procedures specified in the drying benchmark, gradually increase the temperature of the medium and reduce the relative humidity, so that the wood The evaporation surface of the water gradually moves to the inside until the end of drying. During the drying process, the internal stress, cracking and deformation should be eliminated or relieved, and the physical and mechanical properties of the wood should not be reduced to ensure the drying quality.
