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Cross-laminated lumber structure and manufacturing method thereof

A technology of laminated lumber and three-layer materials, applied in the structure of cross-laminated lumber and its manufacturing field, can solve problems such as low strength and poor stability, and achieve the goals of increasing material yield, high dimensional stability, and improving drying efficiency Effect

Active Publication Date: 2018-10-19
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 lumber structure and manufacturing method thereof
  • Cross-laminated lumber structure and manufacturing method thereof
  • Cross-laminated lumber structure and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] The cross-laminated lumber described in this embodiment is formed by cross-lamination and pressing of finger-jointed boards, wherein the finger-joined boards are made of eucalyptus small-diameter logs for slotting and drying, and refer to Figure 4 Saw cutting in the same manner, finger-joint the ends of the obtained wood strips 100 and splice them in parallel at the sides, and retain stress relief grooves 110 in the finger-joint boards on the surface of the cross-laminated lumber.

[0070] The concrete preparation steps of described finger joint plate are:

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

[0072] 2) Stress release grooves 110 are made: draw stress rel...

Embodiment 2

[0081] The concrete preparation steps of described finger joint plate are:

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

[0083] 2) Stress release groove 110 is opened: the stress relief groove 110 with a length of 10% of the length of the round material is drawn at both ends of the required dry round material, and the length is 10 cm. The direction of the stress release groove 110 passes through the pith center, and the depth is 3 cm and a width of 3 mm.

[0084] 3) Drying: The round wood should be dried naturally to a moisture content of 45% in a place with good ventilation and no sunlight exposure; Under the condition of 90%, carry out drying treatment in the...

Embodiment 3

[0092] The concrete preparation steps of described finger joint plate are:

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

[0094] 2) Stress release grooves 110 are made: draw stress release grooves 110 whose length is 10% of the length of the round material at both ends of the required dry round material, the length is 10 cm, the direction of the stress release groove 110 passes through the pith center, and the depth is 3.5 cm. cm and a width of 4 mm.

[0095] 3) Drying: The round wood should be dried naturally to a moisture content of 45% in a place with good ventilation and no sunlight exposure; Under the condition of 90%, carry out drying treatment in the...

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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 studies on cross-laminated lumber in China. At present, the main problem of cross-laminated lumber is that the stress generated by the glue layer and wood itself due to shrinkage and swelling cannot be released after the material is formed, resulting in material deformation, degumming and cracking. . Fu Hongmei and others stated in the "Application and Development Prospects of Cross-Laminated Timber" published in "Forestry Machinery and Woodworking Equipment" Volume 42 No. 3, 2014 that in order to prevent the To reduce the warpage of the sawn timber and eliminate the impact of uneven sawn timber surface, a stress relief slot can be cut along the length of the sawn timber to reduce the deformation of the sawn timber, but since the stress relief groove 110 i...

Claims

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Application Information

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Patent Type & Authority Patents(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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