Manufacturing method of low sizing amount environment-friendly plywood

A manufacturing method and technology for plywood, applied in the direction of manufacturing tools, joining of wooden veneers, chemical instruments and methods, etc., can solve the problems of difficulty in importing high-quality large-diameter logs, rising plywood raw material prices, and high chemical raw materials. Achieve the effect of low production cost, product value enhancement, and production cost reduction

Active Publication Date: 2018-05-04
NANJING FORESTRY UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Although my country's plywood products are becoming more and more competitive in the international market and occupying a higher and higher share, they are also facing severe challenges, mainly reflected in: the politicization of forest issues and the economic and social development of log producing countries The import of high-quality large-diameter logs is becoming more and more difficult, and the price of chemical raw materials is becoming more and more expensive, leading to a rapid rise in the price of raw materials for plywood production; with the decline of my country's demographic dividend, labor costs are rising rapidly, making the cost accounting and The advantages of other plywood producing countries are gradually weakening; the international requirements for the quality of plywood products are getting higher and higher, especially the requirements for the formaldehyde emission of products are becoming more and more strict, and the export of plywood products in my country has formed a technical trade barrier

Method used

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  • Manufacturing method of low sizing amount environment-friendly plywood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The small-diameter fast-growing poplar is cut into a certain length of wood with a circular saw. The length of the wood is determined according to the requirements of the plywood product format, usually the length of the plywood product is ±100-150mm. Put the wood section in the cooking tank for softening treatment to increase the plasticity of the wood to improve the quality of the rotary cut veneer. In order to ensure the quality of plywood, a special stripping machine is required to remove the bark of the wood section. Then, use a mechanical centering machine to determine the center of rotation of the wood section, and then use a wooden machine to place the wood section on a rotary cutting machine, and then rotary cut it into a veneer with a thickness of 1mm.

[0024] Put the poplar veneer in a hot plate dryer to dry under a certain pressure (less than 0.1MPa). The drying temperature should not be too high and should be controlled below 80°C to prevent warping and de...

Embodiment 2

[0028] The small-diameter fast-growing poplar is made into a veneer with a thickness of 2mm and a moisture content of 6% by the same steps as in Example 1.

[0029] Put the dried veneer on the feeding conveyor belt of the integrated device of low-temperature plasma modification and micro-sizing of wood veneer, enter the low-temperature plasma treatment area driven by the feeding roller, and adjust the upper and lower four pairs of discharge The distance between the electrodes was 10 mm. Turn on the low-temperature plasma power supply and adjust the processing power to 4.5KW. When the voltage between the electrodes reaches the air discharge voltage, a dielectric barrier discharge is formed between the electrodes to generate low-temperature plasma. Poplar veneers are suspended in the air at a speed of 10m / min. The four pairs of electrodes pass continuously through the gap, and the low-temperature plasma modification treatment is performed on the upper and lower surfaces of the v...

Embodiment 3

[0035] Masson pine logs were made into veneers with a thickness of 2mm and a moisture content of 6% by the same steps as in Example 1.

[0036] Put the dried veneer on the feeding conveyor belt of the integrated device of low-temperature plasma modification and micro-sizing of wood veneer, enter the low-temperature plasma treatment area driven by the feeding roller, and adjust the upper and lower four pairs of discharge The distance between the electrodes was 10 mm. Turn on the low-temperature plasma power supply and adjust the processing power to 4.5KW. When the voltage between the electrodes reaches the air discharge voltage, a dielectric barrier discharge is formed between the electrodes to generate low-temperature plasma. Masson pine veneers are suspended in the air at a speed of 10m / min. The four pairs of electrodes pass continuously through the gap, and the low-temperature plasma modification treatment is performed on the upper and lower surfaces of the veneer at the sam...

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Abstract

The invention relates to a method for manufacturing an environmentally friendly plywood with low sizing amount, and belongs to the technical field of wood-based panel manufacturing. The process is to cut wood sections into 1-3mm wooden veneers, dry them to adjust the moisture content to 2-15%, and carry out atmospheric pressure and low-temperature plasma modification treatment on both sides of the veneers. Through the synergistic effect of ultrasound and cyclone, the The adhesive is atomized into particles with a diameter of less than 40 μm and sprayed on the tight surface of the veneer. The amount of adhesive applied on one side is controlled at 10-80g / m2, and the fiber texture directions of adjacent layers of veneer are perpendicular to each other. Pressed to obtain low-sizing environment-friendly plywood. The performance of the product prepared by this method meets the requirements of the national standard for plywood, the amount of formaldehyde released reaches the requirements of E0 level, and the amount of adhesive is reduced by 30-70% compared with the amount of the traditional glue coating method, the product quality is significantly improved, and the production cost is significantly reduced. In addition, the production process of this method is energy-saving and environmentally friendly, and the production equipment is easy to operate, high in efficiency, good in controllability, and can be continuously automated.

Description

technical field [0001] The invention relates to a method for manufacturing an environment-friendly plywood with low sizing amount. It belongs to the technical field of wood-based panel manufacturing. Background technique [0002] Since the 21st century, my country's wood-based panel industry has developed rapidly and has become the largest country in the world's wood-based panel production, consumption and import and export trade. Among the many wood-based panel products, the output and export volume of plywood products have always ranked first. According to relevant data, the output of plywood in my country reached 174 million m3 in 2014, accounting for 57.6% of the total wood-based panel output. The products are exported to more than 100 countries and regions in the world, with an export volume of 10.2614 million m 3 , is the largest category of wood-based panel exports, accounting for 72% of the total export volume of wood-based panels. Although my country's plywood p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B37/12B32B37/10B27D1/08B27D1/00B27K5/00B27G11/00
CPCB27D1/005B27D1/08B27G11/00B27K5/002B32B37/10B32B37/12B32B37/1284
Inventor 周晓燕曹倚中陈敏智陈卫民王翔史书凯蒋帅南万京林卞杰
Owner NANJING FORESTRY UNIV
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