Carbonization wood finger-joint glued-laminated timber and its manufacturing method

A manufacturing method and technology of carbonized wood, applied in the direction of chemical instruments and methods, manufacturing tools, wood layered products, etc., can solve the problems of decay and moth, easy to change color, easy to deform size, etc., to achieve easy gluing and painting, reduce Hydrophilic properties, the effect of eliminating internal stress

Inactive Publication Date: 2008-01-16
NANJING FORESTRY UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing glulam is still a naturally grown biomass material, which has disadvantages such as anisotropy, moisture absorption and desorption due to the hydrophilic hydroxyl group, easy deformation during use, and inconsistent dimensions.
Especially the glulam made of artificial forest wood, due to the large proportion of early wood in the wood, large growth stress, and poor material quality, it will be affected by shrinkage and swelling du...

Method used

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  • Carbonization wood finger-joint glued-laminated timber and its manufacturing method

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Experimental program
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Effect test

Embodiment 1

[0021] Referring to Figure 1, the structure of the carbonized wood finger-jointed integrated board: the carbonized finger-joined integrated board 4 is made of middle slats 1 with finger-jointed tenons processed at both ends after removing defects, and processed with finger-jointed tenons at one end The end slats 3 are lengthwise bonded by glue-coated mortises to a specified length and the sides of the slats 2 are glued to form a specified width. Its main purpose is to make solid wood furniture.

[0022] Manufacturing method:

[0023] a. Cutting and splitting: According to the bending condition, cut the log with medium and small diameter into 1-2m long wood section, and cut it into slats with a thickness of 20mm and a width of 30, 40, 50, 70mm according to the diameter with a band saw and a multi-blade saw .

[0024] b. Carbonization: Use spacers to stack the material carts supporting the carbonization equipment according to the requirements, place heavy objects on the top of...

Embodiment 2

[0030] Carbonized wood finger-joined glulam door frame structure: The structure of carbonized wood finger-joined glulam door frame is the same as that of integrated panels.

[0031] Manufacturing method: Saw logs into two specifications of slats with a thickness of 36mm, a width of 59mm and a width of 62mm. When using the above method for carbonization, the carbonization time should be extended appropriately; the planing, finger jointing, and paneling procedures are the same as the above method; according to the drawings, carry out post-processing such as pulling grooves, keyholes, and milling hinge grooves.

Embodiment 3

[0033] Referring to accompanying drawing 2, the structure of the carbonized wood finger-joined glulam concrete formwork: the carbonized wood finger-joined glulam concrete formwork is formed by gluing in the thickness direction two layers of integrated boards 4 laid vertically and one layer of integrated boards 5 laid horizontally.

[0034] Manufacturing method: use the same method as above a, b, c, d, e to manufacture carbonized wood finger joint integrated board (thickness about 11mm), the adhesive used is urea-formaldehyde resin or modified urea-formaldehyde resin or phenolic resin according to customer requirements . The three-layer integrated board is hot-pressed and glued to synthesize the concrete formwork (thickness 30mm), of which the second layer is double-sided coated with urea-formaldehyde or phenolic resin, and its fiber direction is perpendicular to the upper and lower laminates. The hot-pressing temperature is 140°C, the pressure is 1.0 MPa, the hot-pressing time...

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Abstract

The invention relates to a carbonized figure jointed glulam lumber and a manufacturing method. The carbonized figure jointed glulam lumber is a one-layer integrated board, or one or several layers of lateral battens laying in the sandwich layer and the integrated board with more than two layers is glued in parallel in the direction of thickness. Each layer of the integrated board is made of standard battens formed by gluing many short battens through finger-jointing and tenoning, and then the standard width is formed by gelatinizing on the side of the batten and gluing and joining in parallel. The process of the method includes: log truncation, sawing, carbonization, chopping, finger-jointing, repairing, sanding and repairing; second glue jointing: gelatinizing; testing, warehousing. The advantages are that part of the chemical and physical properties of wood are changed permanently; hydrophilic property of the lumber is reduced and the inner stress is eliminated completely; the color of the wood is darkened and the wood texture is clear; the contained resin inside the wood is removed so that the wood can be glued and finished; the drying operation is substituted by the high temperature carbonization technique; the carbonized figure jointed glulam lumber is of stable size and shape, of no craze and resin and of clear texture and good durability.

Description

technical field [0001] The invention relates to a carbonized wood finger-jointed glulam and a manufacturing method thereof, belonging to the technical field of wood processing. Background technique [0002] Glued-Laminated Timber, also known as glued wood, is a kind of wood that is sawed into planks or strips, dried to the required moisture content, and various defects (such as dead knots, holes, insect eyes, decay, etc.) etc.), and then formed into a certain length by finger-joining, and parallel to the direction of the fiber, it is a plate or square material that is glued along its length, width or thickness direction with an adhesive. Glulam is not only used for building structural materials, but also gradually applied in indoor furniture and decoration. Glulam has the following characteristics: Glulam is a material made of short and small materials glued together, so it can make oversized materials use less, inferior materials can be better used, and improve the utiliza...

Claims

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Application Information

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IPC IPC(8): B27D1/04B32B21/13B27D1/10
Inventor 蒋身学郑明泽张宏何文
Owner NANJING FORESTRY UNIV
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