Drying method for preventing fraxinus mandshurica from cracking

A drying method and water-curing technology, applied in wood treatment, wood impregnation, wood impregnation, etc., can solve problems such as adverse effects on performance, easy cracking and warping, rough wood structure, etc., to reduce hygroscopicity and increase internal energy. , Improve the effect of shrinkage resistance

Inactive Publication Date: 2018-01-09
安徽嘉美工艺品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Fraxinus mandshurica is mainly produced in Northeast China, North China and other places. The sapwood is yellow-white, the heartwood is brown and slightly yellow, the annual rings are obvious but uneven, the wood structure is thick, the texture is straight, the pattern is straight, dull, and the hardness is small. Willow has the characteristics of good elastic

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] In the embodiment of the present invention, a kind of drying method that prevents Fraxinus mandshurica from cracking, concrete method is as follows:

[0016] (1) Submerge the cut ash wood workpiece in sodium chloride solution for 45 minutes, take it out, put it in a freezer with a temperature of -20°C for 24 minutes, and then adjust the temperature to -8°C to continue Constant temperature freezing treatment for 38 minutes;

[0017] (2) Put the ash wood workpiece treated in step (1) into the steam treatment at 440°C for 23 minutes, then adjust the temperature to 210°C and continue the constant temperature steam treatment for 23 minutes, take it out, and immerse it in the treatment agent. After boiling, keep warm and soak for 55~60min;

[0018] The treatment agent is made of the following raw materials in parts by weight: 18 parts of acrylic resin, 1.3 parts of triacontanol, 4.4 parts of copper acetate, 6.5 parts of hydroxyethylamine, 2.2 parts of glycine, and 60 parts o...

Embodiment 2

[0023] In the embodiment of the present invention, a kind of drying method that prevents Fraxinus mandshurica from cracking, concrete method is as follows:

[0024] (1) Submerge the cut and processed ash wood workpiece in sodium chloride solution for 48 minutes, take it out, put it in a freezer with a temperature of -20~-18°C for 26 minutes, and then adjust the temperature to - Continue constant temperature freezing treatment at 7°C for 40 minutes;

[0025] (2) Put the ash wood workpiece treated in step (1) into the steam treatment at 450°C for 25 minutes, then adjust the temperature to 220°C and continue the constant temperature steam treatment for 25 minutes, take it out, and immerse it in the treatment agent on medium heat After boiling, keep warm and soak for 58 minutes;

[0026] The treatment agent is made of the following raw materials in parts by weight: 19 parts of acrylic resin, 1.4 parts of triacontanol, 4.6 parts of copper acetate, 6.7 parts of hydroxyethylamine, 2...

Embodiment 3

[0031] In the embodiment of the present invention, a kind of drying method that prevents Fraxinus mandshurica from cracking, concrete method is as follows:

[0032] (1) Submerge the cut ash wood workpiece in sodium chloride solution for 50 minutes, take it out, put it in a freezer with a temperature of -18°C for 28 minutes, and then adjust the temperature to -6°C to continue Constant temperature freezing treatment for 42 minutes;

[0033] (2) Put the ash wood workpiece treated in step (1) into the steam treatment at 460°C for 27 minutes, then adjust the temperature to 230°C and continue the constant temperature steam treatment for 27 minutes, take it out, and immerse it in the treatment agent. After boiling, keep warm and soak for 60 minutes;

[0034] The treatment agent is made of the following raw materials in parts by weight: 20 parts of acrylic resin, 1.5 parts of triacontanol, 4.8 parts of copper acetate, 6.9 parts of hydroxyethylamine, 2.4 parts of glycine, and 65 parts...

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PUM

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Abstract

The invention belongs to the technical field of wood drying, and particularly relates to a drying method for preventing fraxinus mandshurica from cracking. The drying method specifically comprises thefollowing steps of soaking in a sodium chloride solution, and then freezing, so that hemicellulose is effectively promoted to generate polyreaction so as to generate water-insoluble polymer, therebyreducing the hygroscopicity of fraxinus mandshurica and inhibiting air shrinkage of the fraxinus mandshurica; performing vapor treatment, and then soaking in a treating agent, so that three componentsincluding cellulose, hemicellulose and lignin are effectively promoted to degrade and recombine, and the degree of crystallinity is reduced, thereby releasing the shrinkage stress generated in the treatment process of the fraxinus mandshurica, so that the temperature of water in the fraxinus mandshurica is increased, the internal energy of water molecules is increased, the activity is enhanced, and the binding strength between structural components of the fraxinus mandshurica is reduced, thereby softening the fraxinus mandshurica, reducing the deformation resistance of the fraxinus mandshurica, reducing the shrinkage stress and reducing the cracking possibility; and performing vacuum treatment, and then freeze-drying, so that the shrinkage of the fraxinus mandshurica and the hydrophobicity due to filling of cell cavities are restricted, the anti-shrinkage efficiency of the fraxinus mandshurica is improved, the fraxinus mandshurica is effectively prevented from cracking and warping, and the dimensional stability of the fraxinus mandshurica is increased.

Description

technical field [0001] The invention belongs to the technical field of wood drying, in particular to a drying method for preventing cracking of ash wood. Background technique [0002] Fraxinus mandshurica is mainly produced in Northeast China, North China and other places. The sapwood is yellow-white, the heartwood is brown and slightly yellow, the annual rings are obvious but uneven, the wood structure is thick, the texture is straight, the pattern is straight, dull, and the hardness is small. Willow has the characteristics of good elasticity, toughness, wear resistance, and moisture resistance, but it is easy to crack and warp during the drying process, which has a great adverse effect on the performance; therefore, inventing a drying method to prevent cracking of Ash wood can effectively improve water Improve the utilization rate of willow wood and prolong its service life and improve its performance. Contents of the invention [0003] At the problems referred to above...

Claims

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Application Information

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IPC IPC(8): B27K3/02B27K3/20B27K3/50B27K5/00B27K5/04B27K5/06
Inventor 潘传峰
Owner 安徽嘉美工艺品有限公司
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