Internal wood cracking occurs inside the wood, cracking along the wood rays, such as honeycomb, also called honeycomb cracking. There are no cracks on the surface, only sawing can be found. But it is usually accompanied by uneven appearance or significant shrinkage, or charring, or lighter weight. This is characteristic of over-drying.

Surface cracks are longitudinal cracks that occur along the wood rays on the outer surface of sawn timber (usually the outer cut surface of a chord-cut board). It is caused by excessive surface tensile stress in the early stage of drying

"Natural is the best." In modern society, this has almost become a consensus of people. Everyone knows the reason: modern technology is used in various fields, and almost all products are linked to technology, so that natural things are becoming more and more scarce, and people are beginning to miss the "natural gas" that can be seen everywhere. good time.

Wood modification is the process of improving the properties of wood. It uses chemical, biological or physical media to act on the wood to enhance the desired properties of the wood during the service cycle. In addition, the modified wood itself should be non-toxic during the service cycle and not release any toxic substances during or after the service cycle.

How to prevent and control the blue of wood? Is there a good way?

Factors Affecting Wood Drying Speed The main factors affecting the drying speed of wood are medium temperature, humidity, air circulation speed, wood moisture content gradient, and temperature gradient.

Moisture in wood can move inside the wood under certain conditions, which is called moisture conductivity of wood. Moisture can drain from both ends of the wood by moving along the fiber direction, or it can drain from the sides of the wood across the fiber direction, and in most boards, the length is much greater than the thickness width. The side area of ​​the sheet is much larger than the end area. Therefore, although the conduction of moisture along the fibers is easier than that across the fibers, it is the conduction across the fibers that plays a decisive role in wood drying.

wood drying curve When the wood is dried in a gaseous medium with a certain temperature and humidity, if the change of the moisture content of the wood is measured at regular intervals, and the time is taken as the abscissa and the moisture content is drawn on the ordinate, the curve is called the drying curve. (Figure 1-2). The drying process can be analyzed on the drying curve diagram. The whole process of wood drying can be divided into three stages.

The track type veneer kiln is a patented veneer drying equipment independently developed by our company. The following is a comparison of the advantages and disadvantages between track type veneer drying kilns and roller type dryers