How to dry wood

Abstract: How to dry wood? Fresh wood contains a lot of water, which will evaporate under certain circumstances. The natural evaporation of water will lead to wood shrinkage, cracking, bending deformation, mildew and other defects, which will seriously affect the quality of wood products. Therefore, wood must be forced (controlled) to dry before being made into various wood products. Wood drying is to ensure the quality of wood and wood products and prolong their service life. Appropriate measures must be taken to reduce the moisture (moisture content) in wood to a certain extent. Next, I will introduce you to the wood drying technology. Wood drying How to dry wood Wood drying technology and method

First, why does the wood dry?

Fresh wood contains a lot of water, which will evaporate under certain circumstances. The natural evaporation of water will lead to wood shrinkage, cracking, bending deformation, mildew and other defects, which will seriously affect the quality of wood products. Therefore, wood must be forced (controlled) to dry before being made into various wood products.

Correct drying treatment can overcome the above-mentioned wood defects, improve the mechanical strength of wood and improve the processability of wood.

It is an important technical measure for rational utilization and value-added of wood, and it is also an indispensable first working procedure in the production of wood products.

Second, what are the wood drying methods?

There are several drying methods for wood:

1. Dry naturally. Mainly as for the air, let the sun exposure, but this disadvantage is that the weather conditions are very important, followed by the moisture content of dry wood is not easy to grasp.

2. Artificial drying. Now it is mainly manual drying, and it can be heated by smoking, hot air and steam. Now more steam is used to heat the wood, and the quality of the heated wood is better in all aspects. 3. Heating with solar energy and far infrared rays. This kind can also achieve good results, but it has not been popularized because of its high technical requirements.

Third, the misunderstanding of wood drying

Wood drying equipment = oven?

In order to realize forced drying of wood, wood drying equipment must have three basic functions: heating, humidity control and ventilation.

The heating function is self-evident; Humidity control (spraying steam or atomized water) is used to ensure the high humidity environment needed in some drying stages and prevent wood from cracking and deformation; Ventilation equipment must ensure that hot and humid air passes through all parts of the stack evenly, so that the moisture content of dry wood is uniform.

Simple wood "oven" is usually heated directly or indirectly by hot furnace gas, so it is difficult to organize reasonable airflow circulation and humidity adjustment, and it is difficult to obtain good drying effect with this simple equipment.

Introduction of drying method of wood drying room

Drying wood in drying room is the most basic form of artificial drying, and it is also the most widely used method of drying wood in wood processing industry at home and abroad. This drying method has the following characteristics:

(1) It is necessary to build a drying room or larger metal structure equipment, but the floor area is smaller than the air drying site.

(2) Heating and power supply equipment must be provided.

(3) The production cycle of dried wood is short, which is easy to ensure the continuity of the whole wood processing process.

(4) The dryness of Kimura is not limited by natural conditions, regions, seasons and tree species, and the final moisture content can be obtained at any degree according to requirements.

(5) Mature drying theory and technology can ensure the drying quality.

(6) The structure of drying equipment is not too complicated, and it is safe and reliable to use. No matter what type of wood drying room, it can be used for more than 15 years as long as it is built according to the design requirements and maintained regularly.

Fourth, the shortcomings of insufficient wood drying.

Why do some wooden doors, wooden floors, wooden furniture and other wood products have quality problems such as cracking and deformation after sales? How to reduce the losses caused by these problems to wood enterprises?

After wood products are produced, the shape and material will not change. At this time, the key factors that determine the internal quality of wood products are mainly wood moisture content and drying stress. Production enterprises need to correctly grasp the moisture content of wood products. When the wood products reach the equilibrium moisture content in use, the wood is the least prone to crack and deformation.

Dealers selling wood products should also test the moisture content of the products they sell and master the quality of the products they sell. Choose a manufacturer with good product quality, and any manufacturer that pays attention to product quality will test the moisture content of the product.