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Processing method of modifying anisotropism of round bamboo by laser

A processing method, the technology of round bamboo, which is applied to wood processing equipment, manufacturing tools, reed/straw treatment, etc., can solve the problems of reducing anisotropy, reducing the internal stress of round bamboo shape, and easy cracking of round bamboo, so as to reduce energy Loss, improved anti-split performance, efficient use of the effect

Active Publication Date: 2019-04-09
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that the round bamboo is easy to crack which cannot fundamentally be solved in the prior art, the present invention provides a processing method of laser modifying the anisotropy of the round bamboo
By irradiating the round bamboo with laser, the round bamboo absorbs the laser energy and converts it into heat energy. Under the action of heat, the lignin in the round bamboo undergoes three-dimensional cross-linking with cellulose, hemicellulose, etc., the distribution of substances in the round bamboo changes, and the anisotropy decreases. And reduce the internal stress of the round bamboo shape, fundamentally solve the problem that the round bamboo is easy to crack from the internal structure of the round bamboo, and improve the stability of the shape of the round bamboo

Method used

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  • Processing method of modifying anisotropism of round bamboo by laser
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  • Processing method of modifying anisotropism of round bamboo by laser

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Embodiment 1

[0044] A processing method for laser-modified round bamboo anisotropy, irradiating round bamboo by laser, specifically includes the following steps:

[0045] Step 1: Determine the density and age of round bamboo;

[0046] Step 2: According to the use status of the round bamboo, gradually determine the processing position and range of the laser device and the expected processing thickness. In order to ensure the stability of the laser irradiation modification effect and the performance of the round bamboo, the processing range of the laser device should not be less than the total surface area of ​​the round bamboo The pre-processed thickness of the laser device is 3%-40% of the thickness of the bamboo wall. On the one hand, it ensures that the round bamboo in the part to be treated can absorb enough energy to realize the internal lignin, cellulose, and hemicellulose. On the other hand, it also ensures that the round bamboo will not absorb too much heat and cause damage to the bamboo...

Embodiment 2

[0066] A processing method for laser-modified round bamboo anisotropy, irradiating round bamboo by laser, specifically includes the following steps:

[0067] Step 1: Determine the density and age of round bamboo;

[0068] Step 2: According to the use status of the round bamboo, gradually determine the processing position and range of the laser device and the expected processing thickness. In order to ensure the stability of the laser irradiation modification effect and the performance of the round bamboo, the processing range of the laser device should not be less than the total surface area of ​​the round bamboo The pre-processed thickness of the laser device is 3%-40% of the thickness of the bamboo wall. On the one hand, it ensures that the round bamboo in the part to be treated can absorb enough energy to realize the internal lignin, cellulose, and hemicellulose. On the other hand, it also ensures that the round bamboo will not absorb too much heat and cause damage to the bamboo...

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Abstract

The invention discloses a processing method of modifying anisotropism of a round bamboo by laser and belongs to the field of round bamboo modification. The processing method of modifying anisotropismof the round bamboo by laser comprises the following step: irradiating the round bamboo by laser, wherein the round bamboo absorbs laser energy and converts the laser energy into heat energy, lignin in the round bamboo is crosslinked with cellulose and semicellulose under the action of heat in a three-dimensional space, and substance distribution in the round bamboo changes and the anisotropism isreduced. The processing method of modifying anisotropism of the round bamboo by laser can improve the anisotropism of the round bamboo effectively, so that the anti-split performance of the round bamboo is improved. Meanwhile, when the round bamboo is modeled, the bended stress part of the modeled round bamboo is treated by laser, so that the inner stress of the round bamboo which is modeled canbe reduced, and the round bamboo modeling stability is improved. By thermally modifying the round bamboo, the application field of the round bamboo can be expanded greatly.

Description

Technical field [0001] The invention belongs to the field of round bamboo modification, and specifically relates to a processing method for laser-modified round bamboo anisotropy. Background technique [0002] With the shortage of wood, bamboo, as a natural, environmentally friendly and renewable biomass material, has attracted more and more attention. Bamboo has the advantages of fast growth and strong ecological functions, and its economic, ecological and social benefits are outstanding. Due to the hollow structure and sharpness of the round bamboo, the structure of the round bamboo is uneven. The outer layer is hard-textured bamboo green, the inner layer is loosely organized bamboo yellow, and the bamboo flesh between the bamboo green and the bamboo yellow leads to the round bamboo. Heterogeneous structure, the difference in shrinkage in different parts and directions, produces anisotropy, and its anisotropy is significantly higher than that of wood, which makes it easier to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K9/00B27K5/00
CPCB27K5/005B27K9/002
Inventor 王雪花方露熊先青邹媛媛
Owner NANJING FORESTRY UNIV
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