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Drying process for preventing eucalyptus wood shrinkage

A drying process and wood drying technology, which can be used in wood processing appliances, impregnated wood, manufacturing tools, etc., can solve the problems of eucalyptus wood shrinkage, eucalyptus wood drying quality decline, cracking and other problems

Inactive Publication Date: 2012-01-04
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technology to be solved by the present invention is to provide a process for drying eucalyptus wood, so as to solve the problems such as shrinkage, cracking, bending and other defects of eucalyptus wood drying, which cause the quality of eucalyptus wood drying to decline.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Heating stage: For eucalyptus boards with a thickness of 50cm, the heating stage time is 7h, and the humidity of the drying medium is kept above 95% during this stage, and the central temperature of the wood rises from room temperature to 45-48°C;

[0017] (2) Heat preservation stage: the heat preservation time is 36 hours. At this stage, the humidity of the drying medium should be kept above 75%, and the temperature of the wood center should be kept at 45-48°C;

[0018] (3) Heating stage: the central temperature of the wood slowly rises to 58-60°C, and the heating time is 24 hours. At this stage, the humidity of the drying medium is kept above 55%;

[0019] (4) Drying stage: After the above treatment, under the action of the impregnating agent, the wood board is not easy to shrink and crack, which makes drying easier. Therefore, from this stage, slowly increase the temperature of the wood to 75°C, and the humidity of the drying medium Keep it above 35% until the mo...

Embodiment 2

[0022] (1) Heating stage: For eucalyptus planks with a thickness of 70cm, the heating stage time is 10h, and the humidity of the drying medium is kept above 95% during this stage, and the central temperature of the wood rises from room temperature to 45-50°C;

[0023] (2) Heat preservation stage: the heat preservation time is 50 hours. At this stage, the humidity of the drying medium is kept above 75%, and the temperature of the wood center is kept at 48-50°C;

[0024] (3) Heating stage: the central temperature of the wood slowly rises to 60-65°C, and the heating time is 24 hours. At this stage, the humidity of the drying medium is kept above 55%;

[0025] (4) Drying stage: After the above treatment, under the action of the impregnating agent, the wood board is not easy to shrink and crack, which makes drying easier. Therefore, from this stage, slowly increase the temperature of the wood to 75°C, and the humidity of the drying medium Keep it above 35% until the moisture conten...

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Abstract

The invention relates to a drying process for preventing eucalyptus wood shrinkage, and belongs to the technical field of eucalyptus wood drying. The process comprises the following steps of: (1) performing soaking treatment on fresh eucalyptus wood or raw eucalyptus wood with high water content; (2) after the soaked raw wood is placed for 3 to 5 days, processing the raw wood into boards with thickness of 5 centimeters or 7 centimeters; and (3) drying the eucalyptus wood boards by controlling the center temperature of the wood and the humidity of the drying medium, and performing heating, heat insulation, drying and humidifying treatment of multiple stages. By the process, the defects of shrinkage, bending, cracking and the like easily produced in the drying process of the eucalyptus wood boards are overcome, and a new path is developed for improving the additional value of the eucalyptus wood.

Description

technical field [0001] The invention relates to a wood treatment method, in particular to a technology for preventing eucalyptus from drying and shrinking, and belongs to the technical field of eucalyptus wood drying. Background technique [0002] Eucalyptus is one of the three fastest-growing woods in the world. It grows fast, resulting in high internal stress, which brings great inconvenience to the processing and utilization of eucalyptus, especially in the drying process of eucalyptus, which is very easy to crack, deform and slow drying. However, eucalyptus wood has a high density, uniform structure, hard quality, high strength, and beautiful patterns. Especially, eucalyptus wood grows rapidly, has strong adaptability, and high wood output, which can meet the large demand of the furniture and flooring industries. Therefore, the reasonable development of eucalyptus wood drying process, the improvement of eucalyptus wood drying yield, and the reduction of drying defects su...

Claims

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Application Information

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IPC IPC(8): B27K3/08B27K3/34
Inventor 武国峰蒲俊文姜亦飞
Owner BEIJING FORESTRY UNIVERSITY
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