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Three-hot-pressing and two-sanding eucalyptus poplar composite artificial board and method for manufacturing same

A manufacturing method and technology for wood-based panels, which are applied in manufacturing tools, chemical instruments and methods, and wood-layered products, etc., can solve the problems of unsightly surface texture, poor veneer quality, and increased furniture costs, so as to reduce release and ensure The effect of cleaning and reducing the cost of furniture

Inactive Publication Date: 2012-11-21
广西南宁绿园北林木业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] ① Poplar plywood, because the poor quality of poplar logs is becoming more and more prominent, the quality of rotary cut veneers is poor, and the static bending strength and elastic modulus of the produced boards are small, which affects the quality of furniture and the use time, which is not conducive to Upgrading of furniture
[0004] ② Eucalyptus plywood has high static bending strength and hardness, but due to eucalyptus wood and processing technology, the surface quality of plywood is poor and the surface texture is not beautiful
[0005] ③Poplar plywood and eucalyptus plywood need to be painted before they can be sold or used after being made into furniture, which increases the cost of furniture. At the same time, the painted furniture will release a certain amount of harmful gas, which does not meet the requirements of environmental protection

Method used

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  • Three-hot-pressing and two-sanding eucalyptus poplar composite artificial board and method for manufacturing same
  • Three-hot-pressing and two-sanding eucalyptus poplar composite artificial board and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Cut eucalyptus logs and poplar logs into 1320mm-long wood sections with a chainsaw machine, and process them into eucalyptus veneers with a thickness of 1.7mm and poplar sheets with a thickness of 0.6mm by rotary cutting and cutting with a shaft-free rotary cutter Then use a mesh belt type veneer dryer to dry and process the veneer, and control the moisture content of the veneer to 10%; then repair some of the veneers by hand, stack the veneers according to different tree species, and then take the eucalyptus single The board is sizing by roller sizing method, the adhesive used is E1 grade urea-formaldehyde resin, the solid content is 65%, and the sizing amount is 340g / ㎡; the eucalyptus veneer after gluing is arranged vertically according to the interlayer fiber direction to assemble the blanks. Assemble the eucalyptus veneer with 3 layers, and then age the slab closed for 40 minutes until the moisture content of the slab reaches 13%; send the slab to a cold press for pr...

Embodiment 2

[0037] The eucalyptus log and the poplar log are cut and processed into wood segments with a chainsaw, and processed into eucalyptus veneer with a thickness of 2.0mm and poplar veneer with a thickness of 0.6mm by rotary cutting and cutting by a rotary cutter; The veneer is dried and processed with a mesh belt veneer dryer, and the moisture content of the veneer is controlled to be 7%. Then, some veneers are repaired manually, and the veneers are stacked according to different tree species, and then the eucalyptus veneers are manually applied. Glue, the adhesive used is melamine-modified urea-formaldehyde resin, with a solid content of 60%, and a sizing amount of 350g / ㎡; the eucalyptus veneers after gluing are arranged vertically according to the interlayer fiber direction to form blanks, and each group contains 6 layers of eucalyptus veneer, then the slab is closed-type aging for 40 minutes until the moisture content of the slab reaches 14%; the slab is sent to the cold press f...

Embodiment 3

[0039]Go to the veneer factory to buy a batch of high-quality 2.2mm thick eucalyptus veneer and 0.6mm thick poplar veneer with a moisture content of 15% of a certain specification, and then take the eucalyptus veneer and apply glue manually. The adhesive used is E1 grade urea-formaldehyde resin. The solid content is 65%, and the sizing amount is 340g / ㎡; the glued eucalyptus veneers are arranged vertically according to the fiber direction between the layers by hand, and each group contains 9 layers of eucalyptus veneers, and then the slabs are closed for 45 minutes. Until the moisture content of the slab reaches 10%; the slab is sent to the cold press for pre-compression at room temperature: pressure 1.1.5MPa, time 35min, after pre-compression, it is sent to the hot press for hot pressing: the temperature is 115 ° C, the pressure is 1.5 MPa, time 16min; then sanding the thickness of the slab until the deviation of the thickness of the slab does not exceed ±0.2mm; after that, the...

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Abstract

The invention discloses a three-hot-pressing and two-sanding eucalyptus poplar composite artificial board and a method for manufacturing the same. The composite artificial board is composed of a core layer, a poplar thin veneer layer and a grainy paper layer soaked with melamine polymer resins. The core layer is eucalyptus poplar plywood which is formed by assembly pressing of a plurality of layers of eucalyptus poplar veneers according to mutual vertical textures, a layer of eucalyptus poplar veneers is arranged on the upper and lower surfaces of the core layer respectively, the fiber direction of the eucalyptus poplar veneers is perpendicular to the fiber direction of the surface of the core layer, and a layer of grainy paper soaked with melamine polymer resins is arranged on outer surfaces of two layers of eucalyptus poplar veneers respectively. The method for manufacturing the artificial board includes log trim, rotary cut, shear, drying, veneer settling and repairing, veneer sizing, assembly row veneer aging, pre-pressing and hot pressing, thickness determination sanding, sizing to age the assembly, pre-pressing and hot pressing, thickness determination sanding, veneering, hot pressing and post processing. According to the three-hot-pressing and two-sanding eucalyptus poplar composite artificial board and the method for manufacturing the same, furniture cost can be reduced, harmful gas releasing of furniture is reduced, and indoor air is guaranteed to be clean.

Description

technical field [0001] The invention relates to a three-hot-pressed two-sanded eucalyptus poplar composite wood-based panel and a manufacturing method thereof. Background technique [0002] At present, the common plywood in the domestic wood-based panel market is mainly poplar plywood and eucalyptus plywood. As materials for furniture manufacturing, traditional poplar and eucalyptus plywood have some shortcomings. The shortcomings are analyzed below: [0003] ① Poplar plywood, because the poor quality of poplar logs is becoming more and more prominent, the quality of rotary cut veneers is poor, and the static bending strength and elastic modulus of the produced boards are small, which affects the quality of furniture and the use time, which is not conducive to Improvement of furniture grade. [0004] ② Eucalyptus plywood has high static bending strength and hardness, but due to the woodiness and processing technology of eucalyptus, the surface quality of plywood is poor an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/04B27D1/08B32B21/06
Inventor 肖文飞朱典想陆安进茆光华
Owner 广西南宁绿园北林木业有限公司
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