Cross laminated wood structure and manufacture method

A manufacturing method and technology for laminated timber, applied in the field of wood processing, can solve the problems of low strength and poor stability, and achieve the effects of increasing the yield of wood, high dimensional stability, and improving drying efficiency

Active Publication Date: 2016-07-20
广东联塑日利门业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a cross-laminated lumber structure and manufacturing method, aiming to solve the technical problems of low strength and poor stability in the existing cross-laminated lumber technology

Method used

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  • Cross laminated wood structure and manufacture method
  • Cross laminated wood structure and manufacture method
  • Cross laminated wood structure and manufacture method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] The cross-laminated timber in this embodiment is made by interlacing and pressing finger-joined boards, wherein the finger-joined laminates are made of eucalyptus small-diameter logs for slotting and drying, and refer to Figure 4 The material is cut by sawing, and the obtained wood strips 100 are joined by end finger joints and parallel splicing on the sides, and the stress relief grooves 110 are retained in the finger joint boards on the surface of the cross-laminated timber.

[0070] The specific preparation steps of the finger joint board are:

[0071] 1) Material selection: Select fast-growing eucalyptus logs to prepare the raw materials for cross-laminated timber finger-bonded laminates according to requirements. Use a rotary cutter to round the logs to remove the branches. The diameter of the logs is 8.5 cm to 9.5 cm. After round, the diameter of the round timber is 8 cm to 9 cm, and the length is 600 mm to 800 mm.

[0072] 2) Opening the stress relief groove 110: draw ...

Embodiment 2

[0081] The specific preparation steps of the finger joint board are:

[0082] 1) Material selection: Select fast-growing eucalyptus logs according to requirements to prepare the raw materials for cross-laminated timber finger-bonded laminates. Use a rotary cutter to round the logs to remove branches. The diameter of the logs is 9.5 cm to 11.5 cm. The diameter of the round timber is 9 cm to 11 cm, and the length is 800 mm to 1000 mm.

[0083] 2) Opening the stress relief groove 110: draw stress relief grooves 110 with a length of 10% of the length of the round material at each end of the required dry round material, the length is 10 cm, the direction of the stress relief groove 110 passes through the marrow core, and the depth is 3 Cm, the width is 3 mm.

[0084] 3) Drying: Choose a well-ventilated place without sun exposure to dry the round timber naturally to a moisture content of 45%; then stack the round timber into the drying kiln at a temperature of 50°C to 70°C and a relative ...

Embodiment 3

[0092] The specific preparation steps of the finger joint board are:

[0093] 1) Material selection: select fast-growing eucalyptus logs to prepare the raw materials for cross-laminated timber finger-bonded laminates according to requirements. Use a rotary cutter to round the logs to remove branches. The diameter of the logs is 11.5 cm to 12.5 cm. The diameter of the round timber is 11 cm to 12 cm, and the length is 1000 mm to 1200 mm.

[0094] 2) Opening stress relief grooves 110: draw stress relief grooves 110 with a length of 10% of the length of the round material at each end of the required dry round material, the length is 10 cm, the direction of the stress relief groove 110 passes through the marrow core, and the depth is 3.5 Cm, the width is 4 mm.

[0095] 3) Drying: Choose a well-ventilated place without sun exposure to dry the round timber naturally to a moisture content of 45%; then stack the round timber into the drying kiln at a temperature of 50°C to 70°C and a relativ...

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Abstract

The invention discloses a cross laminated wood structure and a manufacture method thereof. The cross laminated wood is formed by combining at least three layers of materials which are respectively an upper first surface layer, a middle core layer and a lower second surface layer, wherein the first surface layer, the core layer and the second surface layer are fixed through glue. The manufacture method comprises the following steps: selecting materials; performing rounding; forming stress release grooves; drying; performing rough shape cutting; performing broaching; assembling a blank; pressing a plate and the like. According to the cross laminated wood structure and the manufacture method thereof, the drying stress is effectively released, the drying defects are reduced, and the drying energy consumption is reduced; and as the stress release grooves are reserved in two surface finger joint laminated boards of the cross laminated wood, it is ensured that the moulded cross laminated wood is relatively high in dimensional stability in a humid and dry environment. In addition, the stress release grooves are relatively scattered in the cross laminated wood, and the mechanical strength of the cross laminated wood is not affected, so that the technical problems that the strength is low and the stability is poor in an existing cross laminated wood technology are solved well.

Description

Technical field [0001] The invention relates to the field of wood processing, in particular to a structure for cross-laminated timber and a manufacturing method thereof. Background technique [0002] There are few related researches on cross-laminated timber in China. At present, the main problem of cross-laminated timber is that the stress caused by the shrinkage and swelling of the glue layer and wood cannot be released after the material is formed, causing material deformation, degumming and cracking. . Fu Hongmei et al. stated in the "Application and Development Prospects of Orthogonal Glulam" published in "Forestry Machinery and Woodworking Equipment" 2014 Vol. 42 No. 3, in order to prevent the preparation of orthogonal glulam (cross-laminated timber) The warping and deformation of sawn timber and the effect of uneven surface of sawn timber can be eliminated. A stress relief slit can be cut along the length of the sawn timber to reduce the deformation of sawn timber. Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/04B27D1/06B27D1/08B32B7/12B32B3/22B32B3/14B32B21/13
CPCB27D1/04B27D1/06B27D1/08B32B3/14B32B3/22B32B7/12B32B21/13
Inventor 胡传双古今涂登云廖宇超胡芳园云虹
Owner 广东联塑日利门业有限公司
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