Vacuum drying method for processing wood plate raw materials

Abstract

The invention discloses a vacuum drying method for processing wood plate raw materials, which belongs to a drying method for wood plate raw materials. Drying process includes a step A, placing the wood plate raw materials into a drying tank, sealing an opening of the drying tank, and forming a vacuum environment in the drying tank by the aid of vacuumizing equipment; and a step B, heating the drying tank from the outside of the drying tank at the temperature ranging from 30 Celsius degrees to 165 Celsius degrees for 72 hours to 360 hours, and obtaining a dried wood plate raw material finished product. By means of drying in a vacuum condition, temperature required for evaporating moisture is lowered, accordingly, the wood plate raw material is dried at relatively low temperature, loss of the raw materials due to over high temperature is avoided, and the drying tank placed transversely is favorable for being heated from the outside thereof. In addition, the steps of the vacuum drying method for processing the wood plate raw materials are simple, and the method is suitable for drying various wood materials, is particularly suitable for drying wood of fast-growing forests, and is wide in application range.

Description

technical field [0001] The invention relates to a drying method for wood board raw materials, more specifically a vacuum drying method for processing wood board raw materials. Background technique [0002] With the continuous maturity of the panel furniture market, more and more large-scale furniture manufacturers and even forest and wood research institutes have begun to focus on the research and innovation of wood panel production technology, while the existing wood panel processing technology is to cut the dried raw materials It is composed of multi-layer thin boards of different thicknesses. Since most of the raw materials for wood boards are fast-growing forest woods with high water content, they need to be completely dried before they can be used for processing wood boards. However, the drying of existing wood board raw materials The process is mainly divided into three types. The first one is to place the raw materials directly at room temperature and wait for them to...

AI Technical Summary

Problems solved by technology

[0002] With the continuous maturity of the panel furniture market, more and more large-scale furniture manufacturers and even forest and wood research institutes have begun to focus on the research and innovation of wood panel production technology, while the existing wood panel processing technology is to cut the dried raw materials It is composed of multi-layer thin boards of different thicknesses. Since most of the raw materials for wood boards are fast-growing forest woods with high water content, they need to be completely dried before they can be used for processing wood boards. However, the drying of existing wood board raw materials The process is mainly divided into three types. The first one is to place the raw materials directly at room temperature and wait for them to dry naturally. However, the drying principle of this drying method is relatively simple, and the drying speed is slow. The impact of air temperature and the surrounding environment of the storage place; the second is to place the wooden board raw material (that is, the whole fast-growing tree) in a vacuum environment, and dry it by heating in the vacuum environment. This drying process is relatively Compared with the aforementioned one, the drying speed is faster, but under the action of the internal stress of the fast-growing forest, it is easy to crack the raw material of the wood board, causing cracks to occur in the finished wood board in the later processing and reducing the quality of the product; After the fast-growing forest wood used as the raw material of wood boards is processed into thicker wood blocks, they are then dried according to the second method mentioned above. This method can improve the cracking situation in the second drying method above, but the dried wood blocks will still be damaged. During the drying process, affected by its internal stress, its thickness changes, resulting in some of the dried wood blocks being unusable and reducing the utilization rate of wood board raw materials. further improvement