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Method of making a laminated wood product

A wood product, longitudinal direction technology, applied in the direction of wood layered products, wooden veneer joints, layered products, etc., can solve the problems of large material loss, achieve no reduction in strength performance, increase total output, and improve humidity Effects of Change Tolerance

Pending Publication Date: 2019-08-02
STORA ENSO OYJ
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, processing of beech has greater material loss compared to processing of spruce

Method used

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  • Method of making a laminated wood product
  • Method of making a laminated wood product
  • Method of making a laminated wood product

Examples

Experimental program
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Effect test

Embodiment Construction

[0089] Figures 4a-4d and 5a-5b show a strategy to increase overall yield: if you keep the plate integrity ( Figure 4b ), there will be no two identical boards, so it will be difficult to fit them in one layer with small gaps. Usually you'll trim the edges to get a board with parallel edges. On the other hand, most boards can be split symmetrically in the middle so that the two halves fit together nicely, as shown, which results in layers where there is a fairly small gap between the board and the small trim scrap.

[0090] Figures 4a-4d It schematically shows how the generally trapezoidal slats 20 are cut longitudinally and rearranged so as to provide an approximately rectangular polymeric panel. For example, the stave 20 may be cut along a longitudinal line to form a pair of stave blocks 21a, 21b. By moving the position of the slat pieces 21a, 21b so that their rounded edges face each other and also rotating one of the slat pieces 21b about an axis parallel to the widt...

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Abstract

The present disclosure relates to a method of producing a laminated wood product, comprising providing a plank presenting a pair of parallel major surfaces, a pair of minor surfaces, a pair of end surfaces and a longitudinal direction parallel with said major and minor surfaces and perpendicular to the end surfaces, said plank having a water content of more than 25 % by weight, preferably more than 30 % by weight, initializing at least one longitudinal crack in the plank, drying said crack initialized plank to a moisture content of less than 20 % by weight, and laminating said crack initialized plank by gluing at least one of its major surfaces to a surface of a second member, thus forming the laminated wood product. The disclosure also relates to a laminated wood product, which may be formed according to the method.

Description

technical field [0001] The present invention relates to a method of making a laminated wood product, and to a wood product that can be made according to the method. [0002] The method is particularly suitable for processing so-called hardwoods, but it can also be used for softwoods. Background technique [0003] One of the most commonly used species of construction wood is spruce or Norway spruce. However, the trend is that the proportion of spruce in European forests is decreasing. [0004] On the other hand, the proportion of beech, especially red beech, is increasing. [0005] Therefore, beech is attractive because its strength properties are actually superior to spruce. However, beech has a higher shrinkage rate than spruce, for example, and is therefore more prone to drying-related deformations (twisting, bowing, warping, bending) than spruce. Thus, dry beech boards require more material removal to obtain flat boards than corresponding spruce boards. Therefore, pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27M1/08B27M1/00B27M3/00B32B21/04B32B21/13B32B21/14E04C3/12B27B5/075
CPCB32B21/04B32B21/13B32B21/14E04C3/122B27D1/08B27F1/02B27M1/02B27M3/0026B32B3/18B32B5/022B32B7/12B32B5/12B32B5/024B32B21/08B32B21/02B32B21/10B32B2250/40B32B2307/546B32B2307/732B27D1/005B27F1/04B27M1/003B27M1/08B27M3/0086B32B21/042B27B5/075B27M3/0053B32B2250/03E04C2/12B27M3/00B27M1/00
Inventor M.希尔姆克H.基尔希马尔
Owner STORA ENSO OYJ
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