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Manufacturing method of low-glue-consumption environmental-friendly concrete template

A technology of environmentally friendly concrete and manufacturing method, which is applied in the direction of manufacturing tools, bonding of wooden veneers, other plywood/plywood appliances, etc. The effect of low cost, energy saving and environmental protection in the production process, and short processing time

Active Publication Date: 2016-07-20
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, because wood is a porous material, it is easy to absorb moisture and water, which causes changes in size and shape, especially the wooden concrete formwork is based on multi-layer plywood, and the strength and water resistance of the glue layer directly affect the repeated turnover times and service life
In actual production, the quality of the formwork is mainly ensured by using waterproof adhesives and increasing the amount of adhesives. Usually, the amount of double-sided adhesives is 220-340g / m 2 , however, this will significantly increase the production cost of the product

Method used

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  • Manufacturing method of low-glue-consumption environmental-friendly concrete template

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 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 format requirements of the concrete formwork product, usually the length of the concrete formwork product + 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 the concrete formwork, it is necessary to use a special peeling machine to remove the bark of the wood section. Then, a mechanical centering machine is used to determine the center of rotation of the wood section, and then a wood loading machine is used to place the wood section on a rotary cutting machine, and the veneer is cut into a veneer with a thickness of 1.5mm.

[0028] 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 s...

Embodiment 2

[0032] The small-diameter fast-growing poplar is made into a veneer with a thickness of 1.5mm and a moisture content of 6% by the same steps as in Example 1.

[0033] 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 7mm. 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

[0038] Masson pine logs were made into veneers with a thickness of 2.5mm and a moisture content of 6% by the same steps as in Example 1.

[0039] 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. The masson pine veneers are suspended in the air at a speed of 2m / 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 th...

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Abstract

The invention relates to a manufacturing method of a low-glue-consumption environmental-friendly concrete template and belongs to the technical field of manufacturing wood-based panels. The process comprises the following steps of rotary cutting a short-cut wood into 1.5-2.5mm wood veneers, drying, regulating the moisture content to 2-10 percent, carrying out normal-pressure low-temperature plasma modification treatment on double sides of each veneer, atomizing an adhesive into particles with the diameter to be 40 microns through synergism of ultrasound and cyclone, spraying the particles on a tight side of each veneer, controlling the spreading quantity of a single-sided adhesive to be 10-80g / m<2>, vertically assembling the veneers mutually in the fiber texture directions of veneers at adjacent layers, then prepressing, hot pressing and covering a film to manufacture the low-glue-consumption environmental-friendly concrete template. According to the manufacturing method, the performances of a product accord with the national standard requirements, no free formaldehyde is released, in addition, the dosage of the adhesive is lowered by 30-70 percent compared with that in the traditional gluing manner, the quality of the product is dramatically promoted, and the production cost is obviously lowered; and in addition, the production process saves the energy and is environment-friendly, production equipment is simple and convenient in operation, the efficiency is high, the controllability is good, and continuous automation operation can be carried out.

Description

technical field [0001] The invention relates to a method for manufacturing an environment-friendly concrete template with a low glue-sizing amount. It belongs to the technical field of wood-based panel manufacturing. Background technique [0002] Concrete formwork is a temporary structure that can be removed to form and maintain the newly poured concrete so that it can reach a certain strength to bear its own weight. It is an important tool for the construction of concrete structures. In cast-in-place concrete structure engineering, formwork engineering generally accounts for 20% to 30% of the cost of concrete structure engineering, 30% to 40% of engineering labor, and about 50% of construction period. Formwork technology directly affects the quality, cost and benefit of engineering construction. Therefore, it is an important content to promote the progress of my country's construction technology, and building formwork occupies a very important position in construction proj...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/08B27D5/00B28B7/00
CPCB27D1/08B27D5/00B28B7/00
Inventor 周晓燕陈敏智曹倚中陈卫民王翔史书凯蒋帅南万京林卞杰
Owner NANJING FORESTRY UNIV
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