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Glue laminated wood member pressurizing preparation process based on air-dried wood density parameters

A technology of air-dry density and preparation technology, which is applied in the direction of wood processing utensils, wooden veneer joints, manufacturing tools, etc., to achieve the effect of strong operability

Inactive Publication Date: 2014-04-02
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention proposes a pressurized preparation process of glued wood components based on wood air-dry density parameters. The determination of the pressing time solves the unfavorable problems of only relying on experience to determine the pressure, or ignoring the effect of wood relaxation, and effectively guarantees the bonding performance of glued wood structural members

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A pressurized preparation process of glued wood components based on wood air-dry density parameters, including four processes of wood plywood gluing, pressure application, pressure replenishment and pressure relief curing. 50% of the environmental conditions;

[0025] Determine the value range of pressurized pressure according to the wood air-dry density parameter, and determine the timing and range of supplementary pressure according to the wood air-dry density parameter:

[0026] Wood with a moisture content in the air-dried state, that is, wood with a moisture content in the range of 8% to 15%, is classified as low-density (3 ), medium density (0.45~0.60g / cm 3 ) and high density (>0.60g / cm 3 ) three categories, for these three types of wood raw materials with different air-dry densities, determine the magnitude of the applied pressure and the timing of supplementary pressure;

[0027] When the wood is a low-density material, the initial pressurization pressure is 0...

Embodiment 2

[0032] A pressurized preparation process of glued wood components based on wood air-dry density parameters, including four processes of wood plywood gluing, pressure application, pressure replenishment and pressure relief curing. Under 80% environmental conditions;

[0033] Determine the value range of pressurized pressure according to the wood air-dry density parameter, and determine the timing and range of supplementary pressure according to the wood air-dry density parameter:

[0034] Wood with a moisture content in the air-dried state, that is, wood with a moisture content in the range of 8% to 15%, is classified as low-density (3 ), medium density (0.45~0.60g / cm 3 ) and high density (>0.60g / cm 3 ) three categories, for these three types of wood raw materials with different air-dry densities, determine the magnitude of the applied pressure and the timing of supplementary pressure;

[0035] When the wood is a low-density material, the initial pressurization pressure is 0....

Embodiment 3

[0040]A pressurized preparation process of glued wood components based on wood air-dry density parameters, including four processes of wood plywood gluing, pressure application, pressure replenishment and pressure relief curing; the four processes are all carried out at a temperature of 20°C and relative humidity 65% of the environmental conditions;

[0041] Determine the value range of pressurized pressure according to the wood air-dry density parameter, and determine the timing and range of supplementary pressure according to the wood air-dry density parameter:

[0042] Wood with a moisture content in the air-dried state, that is, wood with a moisture content in the range of 8% to 15%, is classified as low-density (3 ), medium density (0.45~0.60g / cm 3 ) and high density (>0.60g / cm 3 ) three categories, for these three types of wood raw materials with different air-dry densities, determine the magnitude of the applied pressure and the timing of supplementary pressure;

[00...

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Abstract

The invention discloses a glue laminated wood member pressurizing preparation process based on air-dried wood density parameters. The glue laminated wood member pressurizing preparation process includes the steps: gluing wooden laminated boards; applying pressure; supplementing pressure; relieving pressure and maintaining. The range of a pressurizing value, a pressure supplementing opportunity and a repressing range are determined according to the air-dried wood density parameters. By the process, the pressure value range and the pressure supplementing opportunity are determined for the glue laminated wood pressurizing preparation process according to the cross grain pressure bearing performances controlled by the air-dried wood density parameters, the process solves the problems that the applied pressure is determined only by relying on experience or influence of a wood relaxation effect is ignored and the like, and the bonding performance of glue laminated wood structural members is ensured.

Description

technical field [0001] The invention relates to the field of glued wood preparation, in particular to a pressurized preparation process of glued wood components based on wood air-dry density parameters. Background technique [0002] Due to the advantages of energy saving and environmental protection, excellent structural performance, and the size and shape are not limited by the log diameter, the glued wood structure is currently widely used in the field of foreign building structures. In recent years, due to my country's energy-saving emission reduction and green building technology policy guidance, the development of glued wood structures in my country has shown a momentum of rapid development. [0003] When gluing wood, within a certain range, the greater the pressure, the more glue penetrates into the wood, the greater the gluing area, and the higher the gluing strength. On the contrary, it drops, or the wood is crushed and damaged, so the determination of the pressure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/08
Inventor 岳孔刘宇刘伟庆陆伟东霍瑞丽王磊磊夏蛟
Owner NANJING UNIV OF TECH
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