Method for manufacturing compressed carbonized poplar board

A production method and technology of compressing charcoal, applied in the direction of wood compression, charcoal burning/combustion, wood processing appliances, etc., can solve the problems of reduced density and strength, thickness rebound, small internal stress, etc., to eliminate compressive stress and prevent backlash. The effect of small elastic and internal stress

Inactive Publication Date: 2010-06-16
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to propose a production method of compressed poplar wood boards with small internal stress and good dimensions, aiming at the defects of thickness springback, density and strength reduction in the compressed poplar wood boards of the prior art during use. Poplar planks for stability and durability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] a. Preparation of poplar wood material, cut the poplar wood into 400mm long and 180mm wide raw material boards with a sawing machine, and planing with a planer. The thickness of the planed board depends on the compression rate of poplar wood. In the embodiment, the compression rate of the raw board is 30%, and the thickness of the finished board after compression is required to be 5mm, so the planing thickness of the raw board is 7.2mm, and the moisture content of the raw board is controlled to be 15%;

[0021] b. Compress wood, place the above-mentioned planed raw board in a hot press with a temperature of 90°C and compress it, use a thickness gauge to control the thickness of the compressed raw board to 5mm, press 2.5MPa, and compress for 45min;

[0022] c. To dry the wood, place the above-mentioned compressed raw material plate in a dryer with a temperature of 98° C. for 90 minutes;

[0023] d. Carbonize wood, place the above-mentioned dried compressed raw material b...

Embodiment 2

[0030] a. Preparation of poplar wood material, cut the poplar wood into 450mm long and 170mm wide raw material boards with a sawing machine, planing with a planer, the thickness of the planed board depends on the compression rate of the poplar wood, this paper In the embodiment, the compression rate of the raw board is 40%, and the thickness of the finished board after compression is required to be 5mm, so the planing thickness of the raw board is 8.4mm, and the moisture content of the raw board is controlled to be 14%;

[0031] b. Compress wood, place the above-mentioned planed raw board in a hot press with a temperature of 95°C and compress it, use a thickness gauge to control the thickness of the compressed raw board to 5 mm, press 2.8 MPa, and compress for 50 min;

[0032] c. To dry the wood, place the compressed raw material plate in a dryer at a temperature of 100°C for 85 minutes;

[0033] d. Carbonize wood, place the above-mentioned dried compressed raw material board ...

Embodiment 3

[0040] a. Preparation of poplar wood material, cut the poplar wood into 600mm long and 120mm wide raw material boards with a sawing machine, planing with a planer, the thickness of the planed board depends on the compression rate of the poplar wood, this paper In the embodiment, the compression rate of the raw board is 50%, and the thickness of the finished board after compression is required to be 5mm, so the planing thickness of the raw board is 10mm, and the moisture content of the controlled raw board is 13%;

[0041] b. Compress wood, place the above-mentioned planed raw board in a hot press with a temperature of 100°C and compress it, use a thickness gauge to control the thickness of the compressed raw board to 5 mm, press 3.0 MPa, and compress for 55 minutes;

[0042] c. To dry the wood, place the above-mentioned compressed raw material plate in a dryer at a temperature of 103° C. for 80 minutes;

[0043] d. Carbonize wood, place the above-mentioned dried compressed raw m...

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Abstract

The invention relates to a method for manufacturing fast-growing wood sheet, in particular to a manufacturing method for modifying a fast-growing poplar board, belonging to the technical field of sheet manufacture. The invention has the advantages of small internal stress of a compressed carbonized poplar board manufactured by the method and good stability of the size of the board, thereby ensuring the quality of a compressed carbonized wood. The invention overcomes the defects of a fast-growing poplar sheet, such as low density, low hardness, low strength, easy corrosion, difficult direct use and the like, improves the density of the sheet by carrying out compression and densification for the poplar sheet, carries out carbonization on the compressed poplar sheet on the condition of pressurization, and eliminates the compression stress inside the sheet so as to prevent springback of the sheet and improve the size stability, density and strength. The poplar board manufactured by the method can be directly used as a sheet. The compressed carbonized poplar board can be partially or entirely used to replace high-quality precious wood, thereby relieving the contradiction between continuously reduced precious wood resources and increasing demand for wood.

Description

technical field [0001] The invention relates to a production method for fast-growing wood boards, in particular to a production method for modifying fast-growing poplar boards, and belongs to the technical field of board preparation. Background technique [0002] Poplar is one of the main plantation tree species in my country. According to statistics, the area of ​​poplar plantation in my country is 6.66×10 6 hm 2 More than 1.40×10 poplar plantations in the world 6 hm 2 Sum. Poplar has a wide distribution range, many varieties, strong adaptability, and short growth cycle. Generally, it can become useful in about ten years. However, poplar has low density and poor strength, and belongs to fast-growing wood, which affects its application range and hinders the development of poplar processing industry in China. Therefore, how to efficiently utilize the rich poplar fast-growing wood resources is an important issue for plantation wood processing and utilization. [0003] At...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27M1/08B27M1/02B27M1/06
Inventor 邓玉和陈旻廖承斌徐了王军陈琛
Owner NANJING FORESTRY UNIV
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