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Production method for gradually thickening compression layer of surface layer of wood

A production method and compression layer technology, which is applied in wood compression, wood treatment, wood processing equipment, etc., can solve the problems of small controllable range of compression layer thickness, small compression layer thickness, and low compression layer density, so as to avoid secondary The number of products, the improvement of elastic modulus, and the effect of improving mechanical properties

Active Publication Date: 2016-12-14
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing wood surface compression technology mainly has the problems of small compressed layer thickness, low compressed layer density, small controllable range of compressed layer thickness, and high defective rate.

Method used

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  • Production method for gradually thickening compression layer of surface layer of wood
  • Production method for gradually thickening compression layer of surface layer of wood
  • Production method for gradually thickening compression layer of surface layer of wood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1: a kind of production method of wood surface compression layer progressively thickens, as attached image 3 As shown, it specifically includes the following steps:

[0048]a. Dry the board until the moisture content is below 12%;

[0049] b. Heating the solid paraffin with a melting point temperature in the range of 47°C-64°C, and then sealing the wood, it is easier to form a paraffin hydrophobic layer with good sealing performance at a higher temperature;

[0050] c. Carry out water immersion treatment on the board, and the immersion time is determined according to the compression thickness and water immersion coefficient, for example, the density is 0.40g / cm 3 Poplar, when compressed at 180°C, see the water immersion coefficient of compression amount and immersion time Figure 4 , if it is to be compressed into a surface layer of 12.5mm, the soaking time is 4h;

[0051] d. After soaking in water, the wood is clamped by a steel plate with a flat surface...

Embodiment 2

[0055] Embodiment 2: as attached Figure 5 As shown, the heat treatment process of the above compressed surface layer:

[0056] (1) Within 10 to 20 minutes, the temperature is uniformly raised from room temperature to 90-110°C, and the oxygen content is uniformly reduced from 20-25% to 13-16%;

[0057] (2) From 10-20min to 75-85min, the temperature is evenly raised from 90-110°C to 120-130°C, and the oxygen content is evenly reduced from 13-16% to 9-11%;

[0058] (3) From 75-80min to 88-92min, the temperature is evenly raised from 120-130°C to 150-160°C, and the oxygen content is reduced from 9-11% to 2-3%;

[0059] (4) From 88-92min to 105-110min, the temperature is evenly raised from 150-160°C to 190-205°C, the oxygen content is maintained at 2-3%, and the oxygen content is maintained at 2-3%;

[0060] (5) From 105-110min to 220-230min, keep the temperature at 190-205°C and keep the oxygen content at 2-3%;

[0061] (6) From 220-230min to 265-272min, uniformly cool down fr...

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Abstract

The invention discloses a production method for gradually thickening a compression layer of a surface layer of wood. The method specifically comprises the steps of drying, end sealing, immersion, preheating, hot pressing, thermal treatment and finished product obtaining. According to the production method, the controllable range of the thickness of the compression layer is extended, the accuracy of compression processing is improved, the rate of finished products is increased, and the compression layers has excellent surface density, hardness, bending strength and elasticity modulus.

Description

technical field [0001] The invention relates to a production method for progressively thickening wood surface compression layers, and relates to the fields of wood floors and furniture. Background technique [0002] With the complete cessation of natural forest commercial logging and stricter trade barriers in the international market, high-quality timber resources are becoming increasingly scarce, and fast-growing plantations such as poplar (Populus), Chinese fir (Cunninghamia lanceolata), and masson pine (Pinus massoniana) have gradually become my country's main industrial timber tree species. Since the implementation of the "Natural Forest Protection Project" and the "Fast-growing and High-yield Forest Base Construction Project" in China, the preserved area of ​​fast-growing plantations has reached 69.33 million hm 2 , accounting for 36% of China's forest land area; planted forest stock is 2.483 billion m 3 , accounting for 17% of the total forest stock volume (State For...

Claims

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Application Information

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IPC IPC(8): B27M1/02B27K5/00B27K5/04
Inventor 黄荣凤高志强吕建雄张耀明赵有科
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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