Unlock instant, AI-driven research and patent intelligence for your innovation.

Small-diameter restructured structural woods and manufacture technology thereof

A technology for small-diameter wood and structural wood, which is used in the manufacture of tools, wood processing appliances, and the joining of wooden veneers.

Inactive Publication Date: 2013-11-13
CHINESE ACAD OF FORESTRY
View PDF1 Cites 0 Cited by
  • Summary
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Experimental program
Comparison scheme
Effect test

preparation example Construction

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

[0033] The small diameter grade eucalyptus wood with a diameter of 5cm-10cm is cut into 250cm wood segments, and after fiber separation, a wood fiber bundle with a diameter of 2mm-3mm is formed. figure 1 As shown in the figure, the wood fiber bundles are placed in a drying kiln to be dried, so that the moisture content is controlled at 8%-11%, and then immersed in a phenolic resin adhesive with a solid content of 15%. The time is 5min, take out and drench to make the amount of dipping glue controlled at about 12%, and then place the impregnated wood fiber bundle in a drying kiln with a temperature of 50 ° C, and dry the wood fiber bundle with glue to its moisture content. About 12%, according to the direction of the grain, it is paved into a slab with a length of 250cm, a width of 130cm, and a thickness of 13cm-15cm. The pressing pressure is 3.5MPa, the hot pressing temperature is 170°C, and the holding time i...

Embodiment 2

[0041] Manufacturing method of dislocation mitered small-diameter wood reconstituted structural timber

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

[0043]Small-diameter-grade Chinese fir with a diameter of 5cm-10cm is cut into wood segments of 190cm, and after fiber separation, a wood fiber bundle with a diameter of 1mm-2mm is formed. figure 1 As shown in the figure, the wood fiber bundles are placed in a drying kiln to be dried, so that the moisture content is controlled at 8%-11%, and then immersed in a phenolic resin adhesive with a solid content of 13%. The time is 3min, take out and drench, so that the amount of dipping is controlled at about 14%, the dipped wood fiber bundle is placed in a drying kiln with a temperature of 50 ° C, and the wood fiber bundle with glue is dried to its moisture content of 10%. %-11%, according to the direction of the grain, pave into a slab with a length of 190cm, a width of 130cm, and a thickness of 15cm-18cm, and s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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 man-made panels and their manufacture in the man-made panel industry, and relates to a small-diameter wood reconstituted structural material and a manufacturing method thereof. Background technique [0002] With the rapid development of the application of wood structures in my country, the demand for structural materials in my country has increased rapidly. According to the statistics of the Ministry of Housing and Urban-Rural Development, the gap of structural materials in my country in 2007 was 40 million m2. 3 . With the continuous development of wood-structured houses and buildings in my country, and the amount of wood used for reconstruction after the earthquake in Sichuan is about 20 million m 3 , by 2010, my country's structural material gap will reach 90 million m 3 . According to officials from the Canadian federal government, Canada has built about 300 timber-frame houses in mainland China, a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B27D1/10B27D1/04
Inventor 李柏忠于文吉余养伦
Owner CHINESE ACAD OF FORESTRY