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A large-scale high-density wood-based material and its manufacturing method by microwave heating, pressing and gluing

A wood-based material and microwave heating technology, which is applied in the field of wooden building materials, can solve the problems of cold pressing equipment and molds that cannot meet the pressing requirements, low material density, large amount of mold deformation and damage, etc., to overcome the shortage of high-quality wood and improve the mechanical properties. Superior, the effect of protecting the ecological environment

Inactive Publication Date: 2017-04-05
ERDOS CITY HUALIN SALIX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, wood of fast-growing tree species has become the main raw material of the wood industry, but as building materials, fast-growing tree species have few large-diameter timber, low density, poor mechanical properties, and have defects such as swelling, perishability, and cracking. This situation cannot meet the requirements of building materials; my two inventions, patent No. ZL2007 1 0058564.0 Manufacturing method of high-strength anti-corrosion laminated wood and ZL2009 1 0069858.2 Manufacturing method of salix dyed hard wood, both of which are characterized by cold pressing and heating In the two-step method of solidification, the problems found in production practice are: (1) The unit pressure used during cold pressing is too large to reach 800kg / cm 2 , the amount of mold deformation and damage is large, and cold pressing equipment and molds are difficult to meet the pressing requirements of large-scale materials. (2) The time for heat curing is more than 8 hours, and the production efficiency is low for a long time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: A large-scale high-density wood-based material is characterized in that it is composed of poplar veneer of fast-growing species, mesh cotton gauze, and phenolic resin, and is cured by hot pressing to become 12700mm×400mm ×300mm large-scale high-density wood-based material; its main technical indicators are: density 0.8g / cm 3 , hardness ≥ 80HRR, bending strength ≥ 100mpa, tensile strength ≥ 200mpa, vertical compressive strength ≥ 90mpa, splitting resistance ≥ 18N / mm, high and low temperature repeated dimensional change rate ≤ 0.15%, boiled - frozen - dried The average bending load is ≥300N, the screw holding force is ≥4000N, and the release of free formaldehyde is 0.5mg / L.

[0014] A method for manufacturing large-scale high-density wood-based materials, characterized in that: microwave heating, pressing and gluing are adopted, and the specific implementation steps are as follows:

[0015] (1) Modified dipping and drying of poplar veneer: the poplar veneer...

Embodiment 2

[0020] Embodiment 2: A large-scale high-density wood-based material is characterized in that it is composed of three materials: sand wicker in shrubs, reticular cotton gauze, and phenolic resin, and is cured by hot pressing to become 6000mm×400mm×300mm Large-scale high-density wood-based materials; its main technical indicators are: density 0.85g / cm 3 , hardness ≥ 80HRR, bending strength ≥ 100mpa, tensile strength ≥ 200mpa, vertical compressive strength ≥ 90mpa, splitting resistance ≥ 18N / mm, high and low temperature repeated dimensional change rate ≤ 0.15%, boiled - frozen - dried The average bending load is ≥300N, the screw holding force is ≥4000N, and the release of free formaldehyde is 0.5mg / L.

[0021] A method for manufacturing large-scale high-density wood-based materials, characterized in that: microwave heating, pressing and gluing are adopted, and the specific implementation steps are as follows:

[0022] (1) Modified dipping and drying of salix strips: when the sal...

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Abstract

The invention relates to a large-scale high-density wood-based material. The blank of the large-scale high-density wood-based material is jointly formed by wood veneer from quick growing species of trees or salix psammophila wicker from shrubs, net-shaped cotton gauze and phenolic resin. By means ofThrough a method for manufacturing the large-scale high-density wood-based material through microwave heating, pressing and gluing, the blank undergoes the five procedures including pre-pressing, heating softening, pressing densifying, heating solidifying and pressure keeping cooling in a vertical and horizontal integrated microwave heating press and then can be manufactured into the large-scale high-density wood-based material of 2500mm-30000mm*400mm*300, the density of the material is larger than or equal to 0.7 g / cm<3>, and the mechanical indexes of the material can meet various index requirements of building materials. Thus, an environment-friendly and energy-saving wood engineering structure material is provided for the building industry, favorable support is provided for developing multi-storey wood structure houses, and the large-scale high-density wood-based material is favorable for protecting natural forest resources and controlling desert.

Description

technical field [0001] The invention belongs to the field of wooden building materials, in particular to a large-scale high-density wood-based material and a manufacturing method thereof by microwave heating, pressing and gluing. Background technique [0002] At present, wood of fast-growing tree species has become the main raw material of the wood industry, but as building materials, fast-growing tree species have few large-diameter timber, low density, poor mechanical properties, and have defects such as swelling, perishability, and cracking. This situation cannot meet the requirements of building materials; two inventions of mine, patent No. ZL2007 1 0058564.0 Manufacturing method of high-strength anti-corrosion glulam and ZL2009 1 0069858.2 Manufacturing method of salix dyed hard wood, both of which are characterized by cold pressing and heating In the two-step method of solidification, the problems found in production practice are: (1) The unit pressure used during cold...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27M1/08B27D1/04B27D1/08B27K5/04
Inventor 李茂林
Owner ERDOS CITY HUALIN SALIX TECH CO LTD
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