Small-diameter restructured structural woods and manufacture technology thereof

A technology of small-diameter wood and structural timber, which is applied in the direction of manufacturing tools, wood processing equipment, and the joining of wooden veneers. It can solve the problems of soft material, low density, and small diameter, and achieve the effect of meeting the specification requirements.

Inactive Publication Date: 2010-12-15
CHINESE ACAD OF FORESTRY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the structural materials used in wooden houses are mainly large-diameter logs, laminated veneer lumber and glued wood, and small-diameter wood has not been used to make structural materials. Many scars, loose structure, soft material, low strength and other defects cannot be directly used for structural materials

Method used

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  • Small-diameter restructured structural woods and manufacture technology thereof
  • Small-diameter restructured structural woods and manufacture technology thereof
  • Small-diameter restructured structural woods and manufacture technology thereof

Examples

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preparation example Construction

[0032] (1) Preparation of small-diameter recombined wood

[0033] Cut the small-diameter eucalyptus wood with a diameter of 5cm-10cm into 250cm wood segments, and through fiber separation, form a long wood fiber bundle with a diameter of 2mm-3mm, such as figure 1 As shown, the wood fiber bundles are placed in a drying kiln to dry, so that their moisture content is controlled at 8%-11%, and then they are impregnated in a phenolic resin adhesive with a solid content of 15%. The time is 5 minutes, take it out and drench, so that the amount of glue dipping is controlled at about 12%, and then place the impregnated wood fiber bundles in a drying kiln at a temperature of 50°C, and dry the glued wood fiber bundles until their moisture content is About 12%, according to the direction along the grain, lay a slab with a length of 250cm, a width of 130cm, and a thickness of 13cm-15cm. The pressing pressure is 3.5 MPa, the hot pressing temperature is 170° C., and the holding time is 1.0 ...

Embodiment 2

[0041] Method for manufacturing reconstituted structural lumber with misaligned miter joints

[0042] (1) Preparation of small-diameter recombined wood

[0043]Cut the small-diameter fir with a diameter of 5cm-10cm into 190cm wood segments, and through fiber separation, form a long wood fiber bundle with a diameter of 1mm-2mm, such as figure 1 As shown, the wood fiber bundle is placed in a drying kiln to dry, so that its moisture content is controlled at 8%-11%, and then it is impregnated in a phenolic resin adhesive with a solid content of 13%. The time is 3 minutes, take it out and drench, so that the amount of dipping glue is controlled at about 14%, place the impregnated wood fiber bundles in a drying kiln with a temperature of 50°C, and dry the glued wood fiber bundles until their moisture content is 10%. %-11%, according to the direction of the grain, pave a slab with a length of 190cm, a width of 130cm, and a thickness of 15cm-18cm, and send the paved slab into the hot...

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Abstract

The invention discloses small-diameter restructured structural woods and a manufacture technology thereof. The technology comprises the steps of: firstly, cutting the small-diameter level wood with the diameters of 5-10cm into wood segments which are 180-300cm long, forming wood fiber bundles with full-length diameters of 1-5mm through fiber separation, carrying out gumming, drying, assembling a blank, gluing and other working procedures to manufacture small-diameter restructured woods, and then carrying longitudinal eiking with a finger joint or mitered method; and then, carrying staggered stacking and gluing the small-diameter restructured woods on the finger-joint positions or mitered positions in the thickness direction. The invention overcomes the technological bottlenecks that the small-diamter wood cannot be directly used as structural woods due to the problems of low density, loose structure, soft material quality, low strength and the like, and provides a new approach for the industrialization of the small-diameter woods.

Description

technical field [0001] The invention belongs to the technical field of wood-based panels and their manufacture in the wood-based panel industry, and relates to a small-diameter wooden recombined structural material and a manufacturing method thereof. Background technique [0002] With the rapid development of the application of wood structure buildings in China, the demand for structural materials in my country has increased rapidly. According to the statistics of the Ministry of Housing and Urban-Rural Development, in 2007, the gap of structural materials in my country was 40 million m 3 . With the continuous development of wooden structure houses and buildings in our country, and the amount of materials used for reconstruction after the Sichuan earthquake is about 20 million m 3 , by 2010, my country's structural material gap will reach 90 million m 3 . According to officials of the Canadian federal government, Canada has built about 300 wooden houses in mainland China,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/10B27D1/04
Inventor 李柏忠于文吉余养伦
Owner CHINESE ACAD OF FORESTRY
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