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Single-sided surface layer compressed wood and preparation method thereof

A technology for compressing wood and surface layers, applied in lamination, lamination devices, wood compression, etc., to achieve the effects of uniform temperature distribution, improved flatness, energy consumption and production costs

Inactive Publication Date: 2018-10-19
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses series thermal resistance to form a heat transfer time difference, and prepares single-sided surface compressed wood through the double-hot end method of isothermal heating of the upper and lower platens. Changing the thermal resistance can precisely control the position, thickness and shape of the single-sided surface compressed wood dense layer. , this method overcomes the problem of tile bending deformation caused by the uneven distribution of temperature and moisture in traditional compressed wood

Method used

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  • Single-sided surface layer compressed wood and preparation method thereof
  • Single-sided surface layer compressed wood and preparation method thereof
  • Single-sided surface layer compressed wood and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Double-sided planing of the kiln-dried poplar wood with a moisture content of 12% is prepared into a board with a size of 820×122×24 mm;

[0037] (2) Turn on the hot press, raise the temperature of the upper and lower platens to 120°C, lay three pieces of poplar wood planed on both sides neatly in a single row on a 3 mm heat insulation lining board, and place the wood on both sides 21 mm thickness gauge, place the backing plate and wood together on the lower pressing plate that is preheated to the required temperature;

[0038] (3) close the press, make the hot plate on the press contact with the poplar wood upper surface, preheat 30 seconds;

[0039] (4) Set the pressure of the press to 6 MPa, compress the wood to the required thickness at a feed rate of 0.10 mm / s, and then hold the pressure for 100 seconds;

[0040] (5) Raise the temperature of the lower platen to 121°C, and the heating rate is 10°C / min;

[0041] (6) The pressure is reduced to 1 MPa, and this pr...

Embodiment 2

[0045] (1) Double-sided planing of Poplar tomentosa wood with a dry moisture content of 20% is prepared into a board with a size of 680×110×24 mm;

[0046] (2) Turn on the hot press, raise the temperature of the upper and lower platens to 220°C, lay three pieces of poplar wood planed on both sides neatly in a single row on the 12 mm heat insulation lining board, place the wood on both sides 20 mm thickness gauge, place the backing plate and wood together on the lower pressing plate that is preheated to the required temperature;

[0047] (3) close the press, make the hot plate on the press contact with the poplar wood upper surface, preheat 150 seconds;

[0048] (4) The pressure of the press is set to 12 MPa, and the wood is compressed to the required thickness at a feed rate of 0.22 mm / s, and then maintained for 180 seconds;

[0049] (5) The temperature of the lower platen is raised to 225°C, and the heating rate is 30°C / min;

[0050] (6) Reduce the pressure to 3 MPa, and ma...

Embodiment 3

[0054] (1) Double-sided planing of rubber wood with a room dry moisture content of 10% is prepared into a board with a size of 980×105×21 mm;

[0055] (2) Turn on the hot press, raise the temperature of the upper and lower platens to 180°C, lay three pieces of double-sided planed rubber wood in a single row on the 8mm heat-insulating lining board, and place 18mm on both sides of the wood. Millimeter thickness gauge, place the backing plate and wood together on the lower pressing plate that is preheated to the required temperature;

[0056] (3) Close the press, make the hot plate on the press contact with the upper surface of the rubber wood, and preheat for 70 seconds;

[0057] (4) The pressure of the press is set to 10 MPa, and the wood is compressed to the required thickness at a feed rate of 0.18 mm / s, and then maintained for 200 seconds;

[0058] (5) Raise the temperature of the lower platen to 183°C, and the heating rate is 20°C / min;

[0059] (6) Reduce the pressure to ...

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Abstract

The invention discloses a single-sided surface layer compressed wood and a preparation method thereof, the method comprises the following steps: S1, drying the wood to a moisture content of 10 to 20%;S2, paving the dried wood on a thermal insulation lining, placing thickness gauges on both sides of the wood, and placing the thermal insulation lining and the wood together on a lower pressing platewhen temperatures of a upper pressing plate and the lower pressing plate reaches 120 to 220 DEG C,; S3, closing the press to bring the upper pressing plate into contact with the upper surface of thewood to preheat, after the paving is completed; S4, setting the pressure of the press to 6 to 12 MPa, compressing the wood to the required thickness, and then keeping the pressure; S5, warming the lower pressing plate to a temperature of 0 to 5 DEG C higher than the temperature of the upper pressing plate; S6, reducing the pressure to 1 to 3 MPa and keeping the pressure; S7, releasing the pressureof the press, opening the pressing plate, taking out the wood, and preparing the single-sided surface layer compressed wood. The single-sided surface layer compressed wood and preparation method thereof effectively solves the problem of the tile bending deformation of the single-sided surface layer compressed wood, has no chemical pollution in the processing process, has low production cost and simple operation, and has the advantages of high efficiency and environmental protection ect..

Description

technical field [0001] The invention belongs to the technical field of wood product production technology, and more specifically relates to a single-side-surface compressed wood and a preparation method thereof. Background technique [0002] One-sided wood surface compression is an ideal wood modification method, because for many solid wood products, such as solid wood floors, wall panels, tables and chairs, etc., only the mechanical strength of the wood surface that is in contact with the human body is required. For such solid wood products, one-sided skin compression is very effective and results in minimal loss of volume and lowest cost. Chinese patent CN102423889A discloses a "steam spray cooling hot press and single-sided compressed wooden board and its production method". The specific production steps are as follows: put the slab between two hot pressing plates, and heat the lower hot pressing plate At a certain temperature, the lower hot pressing plate moves relative...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27M1/02B27D3/02B32B21/13B32B21/14B32B7/08B32B37/06B32B37/10
CPCB27D3/02B27M1/02B32B7/08B32B21/13B32B21/14B32B37/06B32B37/10B32B2307/734B32B2309/02B32B2309/04B32B2309/12
Inventor 涂登云陈川富周桥芳赵湘玉胡传双谢迪武
Owner SOUTH CHINA AGRI UNIV
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