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Methods of Improving the Stripping Efficiency of Plantation Birch

A plantation and efficient technology, applied in the field of wood processing, can solve problems such as large shear stress of peeling knives, and achieve the effect of improving efficiency and low energy consumption

Inactive Publication Date: 2017-04-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A convenient, low-energy wood peeling technology needs to be developed urgently, but this must solve the problem of large shear stress of the peeling knife required for wood peeling

Method used

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  • Methods of Improving the Stripping Efficiency of Plantation Birch
  • Methods of Improving the Stripping Efficiency of Plantation Birch
  • Methods of Improving the Stripping Efficiency of Plantation Birch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0018] Select artificial forest birch wood with a diameter of 10-30cm harvested in March 2014, wrap and seal the selected artificial forest birch wood as a raw material with polyethylene plastic film, put it into an ultra-high pressure processing container, and carry out 2- Autoclave for 5 minutes dwell time, take out after processing. The wood peeling machine with adjustable shear force was used to peel the pre-treated and treated plantation birch, and the minimum shear stress of the peeling knife to realize the peeling process was obtained.

[0019] Tables 1 to 3 are the density comparison data of plantation birch treated with different pressures and holding times.

[0020] It can be seen that with the above process conditions, the shear stress of the peeling knife required for peeling can be effectively reduced to 10kgf / cm 2 the following. However, if the pressure is too low or the pressure holding time is too short, the effect is not obvious. If the pressure is too high ...

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PUM

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Abstract

The invention discloses a method for improving the artificial birch forest peeling efficiency. The method comprises the following steps: selecting artificial birch forest wood with the diameter of 10-30cm as a raw material, and before peeling the raw material with a wood peeling machine, performing the following steps in sequence: 1, carrying out sealing treatment on the raw material to prevent water used as a pressure transmitting medium from permeating into the raw material during pressure processing; and 2, carrying out pressure keeping treatment on the sealed raw material under the pressure of 200-400Mpa for 2-5 minutes. According to the method, the shearing stress of a peeling knife required for peeling the artificial birch forest can be reduced to be below 10 kgf / cm<2>, so that the artificial birch forest peeling efficiency can be improved.

Description

technical field [0001] The invention belongs to the field of wood processing, in particular to a method for improving the peeling efficiency of plantation birch. Background technique [0002] Wood peeling is an important procedure in the process of wood processing. Before the 1980s, my country's wood peeling has always been manual, with high labor intensity and low production efficiency. At the end of the 1980s, my country developed the first generation of wood peeling machines. So far, the mechanization of wood peeling has been basically realized. However, there are still many problems in the existing wood peeling technology, mainly in the problems of high power demand and high energy consumption of technical equipment. This is mainly because a large shearing force is usually required to achieve the peeling of the wood. Usually, the shearing pressure stress of the peeling knife required for birch peeling is 110-120kgf / cm 2 . This undoubtedly increases the power requireme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K3/08
CPCB27L1/00B27M1/00
Inventor 于勇张峰铭潘芳朱松明苏光明徐梦龙
Owner ZHEJIANG UNIV