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Method for manufacturing solid wood floorings by utilizing densified fast growing woods

A technology for solid wood flooring and fast-growing wood, applied in the direction of manufacturing tools, wood compression, wood processing appliances, etc., can solve the problems of high surface strength, low overall density, etc., to expand the scope of application, improve dimensional stability, and eliminate compressive residual stress. Effect

Inactive Publication Date: 2012-04-11
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface strength of the board produced by the above scheme is high, and the density of the core layer of the board does not change, so the overall density is as low as 300-580kg / m 3 In order to achieve the popular mid-to-high-end solid wood flooring in the market, the physical and mechanical properties, such as overall density, surface hardness, elastic modulus and static bending strength, are close to or slightly higher than the base materials of mid-to-high-end solid wood flooring

Method used

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  • Method for manufacturing solid wood floorings by utilizing densified fast growing woods
  • Method for manufacturing solid wood floorings by utilizing densified fast growing woods
  • Method for manufacturing solid wood floorings by utilizing densified fast growing woods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] ①Preparation of poplar wood boards: saw the fast-growing poplar wood into boards, dry, plan, and process them into poplar wood boards with a moisture content of 19% and a thickness of 24.0mm according to the densification rate of 25%.

[0023] ② Densification treatment: Put the above-mentioned poplar board in a hot press at a temperature of 112°C and perform densification treatment according to the set thickness of 18mm, the pressure is 2.8MPa, and the time is 70min. After turning off the heat source of the hot press, The densified plate is kept in the hot press for 15 minutes and then taken out from the press;

[0024] ③Health preservation: Place the densified poplar boards indoors for 24 hours to eliminate the residual stress formed during compression, and form a cross-sectional density gradient with low inside and high outside in the thickness direction of the board;

[0025] ④High-temperature heat treatment: place the cured poplar board in an oven at a temperature o...

Embodiment 2

[0030] ①Preparation of bamboo and willow boards: Saw the fast-growing bamboo willows into boards, dry, plan, and process them into bamboo and willow boards with a moisture content of 23% and a thickness of 27.1mm according to the densification rate of 30%;

[0031] ② Densification treatment: Put the above-mentioned bamboo and willow board in a hot press at a temperature of 115°C and perform densification treatment according to the set thickness of 19mm. The pressure is 2.5MPa and the time is 68min. After turning off the heat source of the hot press, The densified plate is kept in the hot press for 18 minutes and then taken out from the press;

[0032] ③Health preservation: Place the compacted bamboo and willow planks indoors for 24 hours to preserve the health, eliminate the residual stress formed during compression, and form a cross-sectional density gradient that is low inside and high outside in the thickness direction of the planks;

[0033] ④High-temperature heat treatment:...

Embodiment 3

[0038] ①Preparation of paulownia boards: sawing the fast-growing paulownia into boards, drying, planing, and processing into poplar boards with a moisture content of 28% and a thickness of 33.3mm according to a densification rate of 40%;

[0039] ② Surface densification treatment: Place the Paulownia board in a hot press at a temperature of 118°C and perform densification treatment according to the set thickness of 20mm. The pressure is 2MPa and the time is 66min. After turning off the heat source of the hot press, densification The plate is kept in the hot press for 22 minutes and then taken out from the press;

[0040] ③Preservation: Place the densified paulownia board indoors for 24 hours to cure the residual stress formed during compression, improve the dimensional stability of the densified wood, and form a cross-sectional density gradient that is low inside and high outside in the thickness direction of the board.

[0041] ④High-temperature heat treatment: place the cure...

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Abstract

The invention relates to a method for manufacturing solid wood floorings by utilizing fast growing woods as raw materials, belonging to the technical field of solid wood flooring preparation. The invention aims to ensure the densified plates to have certain density gradient in the thickness direction by the methods of compressive densification and high temperature heat treatment, improve the surface density, overall density and mechanical properties of the fast growing woods as well as the dimensional stability and corrosion resistance of the densified woods, change the situation that the fast growing woods can not be directly used as the solid wood floorings, expand the application range of the fast growing woods in the industry of solid wood floorings and improve the use value of the fast growing woods. Besides, by adopting the fast growing woods to manufacture the solid wood floorings, on the one hand, the fast growing woods can replace the precious woods, thus protecting the natural forest resources in China and meeting the increasing demands of people, and on the other hand, the bottleneck of solid wood flooring development, caused by shortage of precious raw materials, is mitigated to a certain extent and solid wood flooring development in China is promoted.

Description

1. Technical field [0001] The invention relates to a method for producing a solid wood floor by using modified fast-growing wood as a raw material, and belongs to the technical field of solid wood floor manufacturing. Its main features are: using a special densification method and a high-temperature heat treatment process to manufacture solid wood floors with densified fast-growing wood panels with a certain cross-sectional density gradient. This method does not add any chemical reagents and will not cause any pollution to the environment. 2. Background technology [0002] my country has a large population and a shortage of forest resources, with a coverage rate of only 16.55%. In addition, the natural forest protection project implemented since 1998 has greatly reduced the amount of logging in general ecological protection areas, further increasing the contradiction between my country's timber supply and demand, and seriously hindering the development of my country's timber...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27M3/04B27M1/02B27M1/08
Inventor 邓玉和陈旻吴晶陈琛王宁生王新洲范祥林廖承斌
Owner NANJING FORESTRY UNIV
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