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Wood Drying Method

Drying is done because of the nature of its wood gigroskopis so that the biological water present in the wood must be wasted:
a) water in a timber
In the tree contains a lot of water. In some types of wood moisture content was up half or three-quarters of the dry weight. If the tree is felled and sawn timber and the water was soon left behind the wood. And a water disposal event is very important and very dangerous if not regularly. Part of the water in the timber contained within the cell cavity, water is called the free water. In the wet wood besides free water are also water bound by a cell wall called ambibisi water.

In draining the water that comes out first is the free water. Once the free water was gone and no more water in the cavities of the cells, it is now lived water located in the cell wall (live water ambibisi). When the state of free water has been depleted, and the cell wall is saturated with water dinamakanTitik Saturated Fiber. Above the fiber saturation point this.But below this point, any change in the moisture content will result in changes in the size, therefore changes in water levels below this point influence and mechanical properties of the wood.

b) Purpose Drying
Wood structure and physical properties of wood are both affected greatly to the drying process. The water in the timber becomes our attention in drying, because the use of wood should be dry. So in this drying intended to lower the water content. With a low water content is getting some advantages in terms of:
(1) Reducing the weight, thus simplifying the removal and practically reduce costs.
(2) Adding to the strength of the wood, the smaller the water content, the stronger the wood is.
(3) In order to maintain the stability of size. Below the fiber saturation point change in moisture content result in wrinkle development. If wood dikeingkan until the water level is approaching the level of water at a time to those on, then flower the wood will berkuang wrinkle.
(4) To prevent fungus and rot. Moisture content below 20%
(5) If the timber will then be glued, then the condition that the wood glue to dry.
(6) If the wood will be preserved with preservatives, the order intake was satisfactory obet preservatives, wood must be dried.

Fast and slow to dry wood depends on several factors, namely:
(1) The temperature or heat degrees. In the humidity remains the higher the temperature, the faster the course of drying.
(2) humidity. In a state of constant temperature, the lower the humidity, the faster pengeingan.
(3) Distribution of air. Good air circulation causing wet and cold air contains water vapor flowed, and replaced with dry air and heat, so be quick drying.
(4) The type of wood. Several different types of wood dries. In general, needle leaf wood (fir) faster than on broadleaf wood.
(5) Wood sapwood and wood porch. In general heartwood dries faster than the wooden porch.
(6) The water content of starters, Makin wet wood when the wood is dried, the longer the wood in drying time.

c) Air Drying
Stacking wood or board according to the specific arrangement and let the piles that some time in a state of open or under shade. State degree heat and humidity affect the speed pengeingan, then in this air drying to note is that the arrangements of the wood.