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Method for manufacturing small-diameter wood integrated material planed thin sheet

A manufacturing method and technology of small-diameter wood, which is applied in the manufacture of small-diameter laminated lumber sliced ​​veneer, and the field of veneer manufacturing, can solve the problems of large growth stress, restrict the use range of plantation wood, and easily deform and warp, and achieve simplification. Process, save heat energy consumption, reduce the effect of cutting resistance

Inactive Publication Date: 2010-03-10
BEIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a fundamental difference between plantation wood and natural forest wood. Plantation wood generally has small diameter grades, high inclusions, and larger microfibril angles than natural forest wood. Most of the sawn boards have pith cores. Or close to the pith center, the growth stress is large, easy to deform and warp, the material is relatively soft, etc., and cannot be directly used as high-grade materials such as furniture and interior decoration, which restricts the use range of plantation wood and affects its economic value
In particular, small-diameter wood, tending wood, low-quality wood, or short wood produced during harvesting and processing have not been efficiently utilized for a long time, and there have been no successful reports of using them to make sliced ​​veneer

Method used

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  • Method for manufacturing small-diameter wood integrated material planed thin sheet
  • Method for manufacturing small-diameter wood integrated material planed thin sheet
  • Method for manufacturing small-diameter wood integrated material planed thin sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1: Continuous high-temperature ironing and leveling dryer dedicated to the present invention

[0044] refer to figure 2 , this continuous high-temperature ironing and leveling dryer includes a frame (omitted in the figure), an oil medium heating and circulation device 1, a pressure and gap adjustment device 2, a front rolling table 3, and a rear rolling table 4. Between the platform and the back rolling platform, the long ring-shaped upper steel belt 7 and the lower steel belt 8 driven by the tension roller 5 and the drive roller 6 are set up and down. On the lower part of the upper steel strip, two upper hot plates 9 arranged front and back are provided, and two lower hot plates 10 arranged front and back are arranged under the upper part of the lower steel strip; in the upper hot plate and the lower hot plate Heating pipes 11 are respectively provided, and several rolling rollers 12 protruding from the surface of the upper heating plate and the lower heat...

Embodiment 2-4

[0047] Embodiment 2-4: the preparation of composite reagent used in the present invention

[0048] The weight ratio (unit: kilogram) of each embodiment raw material is shown in Table 1.

[0049] The preparation method is: (taking Example 3 as an example, other examples are basically the same as Example 3 except that the amount of raw materials is different)

[0050] After adding 15 kg of ammonium sulfite, 5 kg of ammonium bisulfite and 5 kg of urea into 175 kg of water, adjust the pH to 8 with ammonia water.

[0051] Table 1

[0052] Example

Embodiment 5-7

[0053] Embodiment 5-7: the preparation of the moisture-curable adhesive used in the present invention

[0054] The weight proportion (unit: kilogram) of each embodiment raw material is shown in Table 2.

[0055] The preparation method is: (taking Example 6 as an example, other examples are basically the same as Example 6 except that the amount of raw materials is different)

[0056] (1) 388.2 kg of polyethylene glycol 600 was heated and melted at 55°C, and then 30.2 kg of triethylene glycol (n=150) and 10.9 kg of ethylene glycol (n=62) were added and mixed Stir evenly to obtain a polyethylene glycol mixture;

[0057] (2) 4.5 kilograms of vitriol oil is added in the butanone of 495 kilograms, must add the butanone solution of vitriol oil;

[0058] (3) Put the polyethylene glycol mixture into the reaction kettle, first put 80% butanone solution added with concentrated sulfuric acid and mix evenly, then add 900 kg of toluene diisocyanate to react, and the reaction temperature i...

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PUM

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Abstract

The invention relates to a manufacturing method of small-diameter wood glulam slicing veneers and a leveling drying device. Small-diameter wood, tended wood, inferior wood or cordwood produced in thecutting and manufacturing process, and the like which are not easily efficiently used are softened by a composite agent by being infused with pressure, and then after flitches are integrated by fingerjoining and obliquely slotting the wood with a moisture-curable type adhesive, the flitches are sliced into wet veneers, and the wet veneers are then sent to a special continuous high-temperature ironing leveling dryer to be leveled and dried into sliced veneers in the clamping of upper and lower steel belts. The invention integrates a series of special technologies and transforms small-diameterwood which is not easily used into sliced veneers which meet requirements of various technical specifications with very wide application ranges. Low-grade wood is fully used, which improves the addedvalue of products and comprehensive utilization efficiency of forest resources. The invention has the advantages of simple and reasonable technique method, low equipment cost, good product quality, broad development prospects and the like. Significant social and economic benefits can be produced after the implementation.

Description

technical field [0001] The invention relates to a method for manufacturing veneer and improvement of equipment, in particular to a method for manufacturing small-diameter laminated wood sliced ​​veneer, which belongs to the field of wood processing. Background technique [0002] The flake-like material produced by planing and processing the log of high-quality and precious tree species with large diameter as raw material is called "natural veneer". After the fast-growing and large-diameter logs are peeled or sliced ​​into veneers, they are processed and glued into wooden squares, and then sliced ​​into veneers of various colors and textures, which are called "artificial veneers". [0003] Since the 1960s, research on artificial veneer has begun abroad. By the mid-1980s, our country also used a large number of artificial veneer veneer plywood purchased from Japan, Hong Kong and other places for interior decoration, and many colleagues also carried out The research and improv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27L5/00B27K3/08B27K3/52B27L5/08
Inventor 刘彦龙刘学艳唐朝发王举伟
Owner BEIHUA UNIV
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