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Laminated wood laminate defect repairing method and production method

A defect repair and production method technology, applied in the field of glulam, can solve problems such as large strength gap and weak glulam layer, and achieve the effect of improving mechanical strength

Pending Publication Date: 2022-03-11
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing glued wood production usually does not repair or use glue to repair defects directly. Even if glue is used to repair, the strength after repair is still far from the original strength of the board, which leads to the problem of weak defects in the glued wood layer. exists

Method used

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  • Laminated wood laminate defect repairing method and production method
  • Laminated wood laminate defect repairing method and production method
  • Laminated wood laminate defect repairing method and production method

Examples

Experimental program
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Embodiment

[0033] Embodiment: a method for repairing defects of glued wood laminates 1, comprising the following steps:

[0034] 1) Refer to figure 1 As shown, dry the glulam laminate 1, check the position of the defect 2 (knot or hole) on the surface, and select the glulam laminate 1 whose widest part of the defect 2 is greater than 20mm, refer to figure 2 As shown, the part with defect 2 is expanded outward to form a hole 3;

[0035] 2) Refer to image 3 As shown, a plurality of grooves 4 spanning the holes 3 in the step 1) are provided on the glued wood laminate 1;

[0036] 3) Refer to Figure 4 As shown, glue is injected into the groove 4, and a steel plate 5 matching the groove 4 is embedded;

[0037] 4) Refer to Figure 5 As shown, self-tapping screws 6 are used to fix both ends of the steel plate 5 .

[0038] Wherein, the expansion range in step 1) is 2-5 mm around the original hole, and the expansion method is cutting or grinding the hole. In order to ensure the firmness ...

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Abstract

The invention discloses a method for repairing defects of laminated wood laminates, which can effectively improve the mechanical strength of the defects by repairing the defects of the laminated wood laminates through a steel plate, and particularly, after the laminated wood laminates are compounded into laminated wood, the steel plate is clamped between two adjacent laminated wood laminates, and the strength of the repaired position is even higher than that of the laminated wood laminates.

Description

technical field [0001] The invention relates to the field of glued wood, in particular to a method for repairing defects of glued wood laminates and a production method. Background technique [0002] Compared with ordinary wood, glued wood has the advantages of high strength, uniform structure, small internal stress, and is not easy to crack and warp. [0003] Natural boards usually have defects such as dead knots and holes, and the parts with defects have low strength and are prone to fracture. [0004] The weak points of glulam usually have defects in the glulam laminates, and these weak points are usually the first places where the glulam breaks after being stressed. Due to the existence of these weak positions, there is a certain gap between the actual strength and theoretical strength of glulam. [0005] The existing glued wood production usually does not repair or use glue to repair defects directly. Even if glue is used to repair, the strength after repair is still ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27M1/00B27D5/00
CPCB27M1/00B27D5/00
Inventor 龚迎春任海青朱旭东谷成燕
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY