The wood door making, not only solid wood door, semi solid door, commercial door, sliding door, barn door, hotel door, fire door, usually need the wood material after drying treatment. The simplest wood drying methods are as follows:
1. Atmospheric drying
Air drying is the main method of natural drying. It evaporates the moisture of wood by using the atmospheric hear in nature to achieve the prupose of drying.
Air drying can be divided into ordinary air drying and forced air drying. Forced air drying has better drying quality.Wood does not cause mildew and discoloration but can be reduced cracking. The drying time can be shortened by 1/2-2/3 comparing with ordinary air drying but with a increased cost by about 1/3.
2. Indoor drying
Indoor drying refers to the artificial control of drying medium parameters in conventional drying room for wood drying. Indoor drying can be divided into low, normal, and high temperature room drying.
The so-called low, normal and high temperature means the medium temperature reaches 50-60℃, 100℃ and above in the drying process.
3. Vacuum drying (vacuum drying)
Vacuum drying is the drying of wood in an aritight container under vacuum conditions. According to the operation mode, it can be divided into intermittent vacuum method and continuous vacuum method.
4. Solar drying.
Solar drying is the use of collectors to absorb solar radiation energy to heat air and then through the convection of air heat, wood drying. The solar drying room can be divided into greenhouse type and external collector type.
5. Dehumidification and drying ( condensation and drying)
The source of dehumidification and drying is flowing through the dehumidifier. First, some water vapor is condensed into water by cooling and discharged. And air is dried and heated, then flowed into the lumber pile to dry the lumber. That is to say, the wet air is reciprocating circulation of condensation, heating and drying in the closed system.
6. Microwave and high frequency drying
Both microwave and high frequency drying are based on wet wood as electrolyte. Under teh action of microwave and high frequancy electromagnetic, water molecules in wood are polarized. At the same time, water molecules are heated by high-speed and frequent swing friction, thus heating and drying wood because of the frequanty alternation of electromagnetic field.