CN102555007A - Method for manufacturing modified hard reconstituted timber - Google Patents
Method for manufacturing modified hard reconstituted timber Download PDFInfo
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- CN102555007A CN102555007A CN2012100593900A CN201210059390A CN102555007A CN 102555007 A CN102555007 A CN 102555007A CN 2012100593900 A CN2012100593900 A CN 2012100593900A CN 201210059390 A CN201210059390 A CN 201210059390A CN 102555007 A CN102555007 A CN 102555007A
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Abstract
The invention relates to a method for manufacturing modified hard reconstituted timber. Micro-veneer scrap waste is taken as a raw material; and the method comprises the following steps of: (1) making the raw material into battens with the width of 3-10mm by using a shredder; (2) modifying by using a modifier; (3) drying to obtain blanks with the moisture content of 10-15 percent; (4) weighing and assembling; (5) compacting the blank in a die by using a cold compression method, wherein the unit pressure is 550-650kg/cm<2>; and (6) cementing and curing the blanks at the temperature of 140+/-5DEG C to obtain the integrated modified hard reconstituted timber. The modified hard reconstituted timber has the following physical indexes that: the density can reach 0.8-1.25g/m<3>, the formaldehyde emission is 0.1-0.4mg/l, the absorbent thickness expansion rate is less than or equal to 1.6 percent, the hardness is more than or equal to 100HRR, the static bending strength is more than or equal to 100MPa, and the heated size change rate is less than or equal to 0.03 percent.
Description
Technical field
The invention belongs to the wood base composite material technical field, relate to the processing technique field of timber or similar material, specifically, is the manufacturing approach of a kind of Wooden modifying and reorganization.
Background technology
At present, the manufacturing of artificial board is to be primary raw material with timber and wood fibre, through different recombination methods; Manufacture various sheet materials such as glued board, core-board, particieboard, density board, be widely used in the every field of woodwork deep processing, the annual production of wood-based plate incrustation plate is 3.1 hundred million square metres by the end of in December, 2011; All be applied to furniture manufacturing and finishing field; The a large amount of forest reserves of annual consumption, and the forest reserves of China are deficient, the hard natural timber critical shortage that density is big, wood property is stable; Implement the needed hard wood of " wildwood protected project " back wood products manufacture field; Mainly be to lean on import to solve, source of goods rise in price in short supply, this situation will restrict the development of woodwork deep processing industry for a long time.
The finished size of veneer fancy plywood is 1220 * 2440mm; The micro veneer that rotary-cut or slicing become 1270 * 2520 * 0.2-0.8mm is carried out for natural famous and precious seeds in the surface; Carry out the veneer processing with base material then and manufacture the veneer fancy plywood; And whole manufacturing process causes a large amount of leftover bits, and the processing mode of present leftover bits is for burning.
There is following problem in timber in regrouping process: the production cycle is long, and energy consumption is high, and usefulness is low; The unstable properties of product own is prone to go mouldy, and is easy to crack; Cupping, the material surface texture is poor, and the free formaldehyde release height can't reach country to the environmental requirement of interior decoration with material.
Summary of the invention
The objective of the invention is to overcome the prior art deficiency, provide a kind of properties of product stable, do not go mouldy, do not ftracture, not yielding, product has designability, the modified hard reorganization Wood products of machinability.
Another object of the present invention provides a kind of with short production cycle, and production efficiency is high, the manufacturing approach of the modified hard reorganization timber that energy consumption is low.
Patent of the present invention is achieved in that
Modified hard reorganization timber be a kind of be that the micro veneer leftover bits of 0.2-0.8mm are primary raw material with thickness, be reassembled as density through modification technology and can reach 0.8-1.25g/m
3Between the manufacturing approach of hard wood, the burst size of methanal of this modified hard wood by using is: 0.1-0.4mg/l, its physical index is thickness swelling rate≤1.6%; Hardness>=100HRR; MOR>=100MPa, the modulus of elasticity in static bending>=14000MPa, surface abrasion resistance≤0.06g/100r; Heating back size changing rate≤0.03%, plate face, edges of boards nail-holding ability>=5000N.
For realizing above purpose, the method that the present invention takes is:
(1) raw-material preparation:
With the micro veneer leftover bits according to same seeds, same thickness, the principle of same color is carried out taxonomic revision, utilizes filament cutter that raw material are processed the veneer strip of width for 3-10mm, and measures the moisture content of raw material, puts into the turnover instrument behind the bundling;
(2) raw material drying is handled:
The drying equipment that adopts is a roller dryer; The inconsistent raw material of moisture content are carried out continuous drying handle, dry temperature is 90 ℃ ± 10 ℃, and charging rate is 6-10m/s; Through making its moisture content uniformity reach 10-15% after the dried, the turnover instrument is put in classification;
(3) manufacturing of modification liquid:
Utilize agitated reactor to make water soluble phenol resin, add fire retardant and anticorrisive agent simultaneously, the mol ratio of phenol and formaldehyde is 1: 1.5, and the molecular weight of modifier is 150, and solid content is 35%, and water-soluble multiple is 4 times under 25 ℃;
(4) the raw material modification is handled:
Dried raw material are utilized modification liquid; Carry out the full-cell process perfusion by the priming by vacuum method; Vacuum is-0.05-1.0MPa; Modification time is 20-30 minute, opens the vacuum tank door, modification liquid recovery pond is put in the raw material taking-up carried out the liquids recovery processing; Handle the moisture in the wood cell by modification; Pectin composition and intercellular Free water are replaced into modification liquid, intercellular distance are shortened, in conjunction with tightr;
(5) raw-material dried after the modification
The equipment that adopts is that the raw material of mesh-belt drier after to modification carry out continuous drying and handle; Baking temperature is 100 ℃-110 ℃, and wind speed is 4-5m/s, and the guipure gait of march is 3-4m/min; Be 30-40min drying time, and dried moisture content is controlled in the 8%-15% scope;
(6) assembly:
Be that 8%15% modified feedstock carries out bundling according to the lumber fibre direction and handles with moisture content, carry out quantitative weighing according to slab needed raw material weight then.
(7) compacting:
Raw material behind the quantitative weighing is piled up in mould, through feed mechanism mould is sent into cold press and suppress, the unit pressure of using is 550-650kg/cm
2, blank is drawn off to specification that sets and density at mould inner pressure;
(8) heat cure is handled:
The specification blank that has mould that will from cold press, draw off; Pile up on the multilayer shelf in the high temperature kiln and carry out heating cure, solidification temperature is 140 ℃-145 ℃, and the circulation wind speed is 3-4m/s; Be 4-6 hour hardening time; Kiln discharge when arriving air-cooled being cooled in back≤40 ℃ hardening time naturally cools to≤demoulding 35 ℃ the time together with mould behind the kiln discharge, and the dimension stock gluing and solidifying of cold moudling this moment be the modified hard wood by using of integral body;
(9) sawing, sanding are handled:
Six faces to the modified hard wood by using after the demoulding are processed, and at first two end faces to length direction carry out the scale sawing, secondly four sides of length direction are carried out the fixed thick processing of sanding respectively, make it become six products smooth bright and clean, that specification is consistent.
The specification limit of said modified hard wood by using: length is 2000-4000mm, and width is 100-200mm, and thickness is 100-200mm.
The good effect of the manufacturing approach of a kind of modified hard reorganization timber of the present invention is:
(1) leftover bits of veneer fancy plywood can be used in a large number,, when solving the shortage of natural hard timber, a large amount of forest reserves can be practiced thrift, for energy-saving and emission-reduction contribute for the cycling and reutilization of waste material has been opened up a new approach widely;
(2) provide a kind of properties of product stable, do not gone mouldy, do not ftractureed, not yielding, product has designability, the modified hard reorganization timber of machinability, and its burst size of methanal is: 0.1-0.4mg/l, its physical property is that density can reach 0.8-1.25g/m
3, thickness swelling rate≤1.6%, hardness>=100HRR, MOR>=100MPa, the modulus of elasticity in static bending>=14000MPa, surface abrasion resistance≤0.06g/100r, heating back size changing rate≤0.03%, plate face, edges of boards nail-holding ability>=5000N;
(3) provide a kind of with short production cycle, production efficiency is high, the manufacturing approach of the modified hard reorganization timber that energy consumption is low; Process of the present invention is advanced practical; Can carry out large-scale industrial production; Modified hard wood by using of many uses; The raw material that can be used as different woodworks such as solid wood door and window, floor, furniture, boat deck, staircase boards uses, and product not only cost low quality is high, and color and beautiful texture are beautiful.
The specific embodiment
Below in conjunction with performance, specify the manufacturing approach of a kind of modified hard reorganization of the present invention timber:
A kind of is the modified hard reorganization timber manufacturing approach that material density can reach 0.8-1.25 with the micro veneer leftover bits, and the practical implementation step is following:
The product specification of implementing is: 2200 * 200 * 200mm, density is 1.2g/m
3
(1) raw-material manufacturing
From the micro veneer leftover bits according to same seeds; Same thickness; The principle of same color is carried out manual sort's arrangement, filters out the veneer that seeds are white rubber, utilizes filament cutter that the white rubber veneer that raw material are of a size of 25 * 2520mm is processed the veneer strip that width is 5 * 2520mm; And measure the moisture content of white rubber veneer strip, put into the turnover instrument behind the bundling;
(2) raw material drying is handled:
The drying equipment that adopts is a roller dryer; The inconsistent white rubber veneer strip of moisture content is carried out continuous drying handle, dry temperature is 90 ℃ ± 10 ℃, and charging rate is 6-10m/s; Through making its moisture content uniformity reach 8-15% after the dried, put into the turnover instrument;
(3) manufacturing of modification liquid:
Utilize agitated reactor to make water soluble phenol resin, add fire retardant and anticorrisive agent simultaneously, the mol ratio of phenol and formaldehyde is 1: 1.5, and the molecular weight of modifier is 150, and solid content is 30%, and water-soluble multiple is 4 times under 25 ℃;
(4) the raw material modification is handled:
Dried raw material are utilized modification liquid, carry out the full-cell process modification through the priming by vacuum method, vacuum is-0.05-1.0MPa; Modification time is 30 minutes, opens the vacuum tank door, modification liquid recovery pond is put in the raw material taking-up carried out the liquids recovery processing; Handle the moisture in the white rubber veneer wood cell through modification; Pectin composition and intercellular Free water are replaced into modification liquid, make intercellular reduced distances, in conjunction with tightr;
(5) raw-material dried after the modification
The equipment that adopts is that the raw material of mesh-belt drier after to modification carry out continuous drying and handle; Baking temperature is 100 ℃-110 ℃, and wind speed is 4-5m/s, and the guipure gait of march is 3-4m/min; Be 30-40min drying time, and dried moisture content is controlled in the 8%-15% scope;
(6) assembly:
With moisture content is that 8%15% modification dried raw material weighs up 105.6Kg, according to the lumber fibre direction bundling of mating formation;
(7) compacting:
The raw material of 105.6Kg is piled up in the mould of 2300 * 202 * 202mm, through feed mechanism mould is sent into cold press and suppress, the unit pressure of using is 650kg/cm
2, the work gross pressure is 2860 tons, and blank is drawn off to specification that sets and density at mould inner pressure;
(8) heat cure is handled:
The specification blank that has mould that will from cold press, draw off; Pile up on the multilayer shelf in the high temperature kiln and carry out heating cure, solidification temperature is 140 ℃-145 ℃, and the circulation wind speed is 4m/s; Be 6 hours hardening time; Kiln discharge when arriving air-cooled being cooled in back≤40 ℃ hardening time naturally cools to≤demoulding 35 ℃ the time together with mould behind the kiln discharge, and the dimension stock gluing and solidifying of cold moudling this moment be the modified hard wood by using of integral body;
(9) sawing, sanding are handled:
Six faces to the modified hard wood by using after the demoulding are processed; At first two end faces of length direction being carried out the scale sawing is 2200mm; Secondly four sides of length direction are carried out sanding respectively, the fixed thick dimension stock that is treated to 200mm, the specification of finished product is 2200 * 200 * 200mm; Make it become six products smooth bright and clean, that specification is consistent through sawing, sanding processing.
The above-mentioned method of the micro veneer leftover bits being made modified hard reorganization timber with reference to embodiment is described in detail; Be illustrative rather than determinate, it is that raw material is made modified hard reorganization Wood products that the inventive method is equally applicable to all kinds of fast growing woods.
Claims (8)
1. one kind is that the micro veneer leftover bits of 0.2-0.8mm are raw material with thickness, is reassembled as density through modification technology and can reaches 0.8-1.25g/m
3Between the manufacturing approach of hard wood, the burst size of methanal of this modified hard wood by using is: 0.1-0.4mg/l, its physical index is thickness swelling rate≤1.6%; Hardness>=100HRR; MOR>=100MPa, the modulus of elasticity in static bending>=14000MPa, surface abrasion resistance≤0.06g/100r; Heating back size changing rate≤0.03%, plate face, edges of boards nail-holding ability>=5000N.
2. the manufacturing approach of a modified hard as claimed in claim 1 reorganization timber, its production stage comprises:
(1) raw-material manufacturing:
From the micro veneer leftover bits according to same seeds; Same thickness; The principle of same color is carried out manual sort's arrangement, filters out the veneer that seeds are white rubber, utilizes filament cutter that the white rubber veneer of raw material is processed the veneer strip of width for 3-5mm; And measure the moisture content of white rubber veneer strip, put into the turnover instrument behind the bundling;
(2) raw material drying is handled:
The drying equipment that adopts is a roller dryer; The inconsistent white rubber veneer strip of moisture content is carried out continuous drying handle, dry temperature is 90 ℃ ± 10 ℃, and charging rate is 6-10m/s; Through making its moisture content uniformity reach 8-15% after the dried, put into the turnover instrument;
(3) manufacturing of modification liquid:
Utilize agitated reactor to make water soluble phenol resin, add fire retardant and anticorrisive agent simultaneously, the mol ratio of phenol and formaldehyde is 1: 1.5, and the molecular weight of modifier is 150, and solid content is 30%, and water-soluble multiple is 4 times under 25 ℃;
(4) the raw material modification is handled:
Dried raw material are utilized modification liquid, carry out the full-cell process modification through the negative pressure of vacuum perfusion, vacuum is-0.05-1.0MPa; Modification time is 20-30 minute, opens the vacuum tank door, modification liquid recovery pond is put in the raw material taking-up carried out the liquids recovery processing; Handle the moisture in the white rubber veneer wood cell through modification; Pectin composition and intercellular Free water are replaced into modification liquid, make intercellular reduced distances, in conjunction with tightr;
(5) raw-material dried after the modification:
The equipment that adopts is that the raw material of mesh-belt drier after to modification carry out continuous drying and handle; Baking temperature is 100 ℃-110 ℃, and wind speed is 4-5m/s, and the guipure gait of march is 3-4m/min; Be 3040min drying time, and dried moisture content is controlled in the 10%-15% scope;
(6) assembly:
With moisture content is that the modification dried raw material of 10%-15% weighs up 105.6Kg, according to the lumber fibre direction bundling of mating formation;
(7) compacting:
Raw material after weighing is piled up in mould, through feed mechanism mould is sent into cold press and suppress, the unit pressure of using is 550-650kg/cm
2, blank is drawn off to specification that sets and density at mould inner pressure;
(8) heat cure is handled:
The specification blank that has mould that will from cold press, draw off; Pile up on the multilayer shelf in the high temperature kiln and carry out heating cure, solidification temperature is 140 ℃-145 ℃, and the circulation wind speed is 4m/s; Be 6 hours hardening time; Kiln discharge when arriving air-cooled being cooled in back≤40 ℃ hardening time naturally cools to≤demoulding 35 ℃ the time together with mould behind the kiln discharge, and the dimension stock gluing and solidifying of cold moudling this moment be the modified hard wood by using of integral body;
(9) sawing, sanding are handled:
Six faces to the modified hard wood by using after the demoulding are processed; At first two end faces of length direction are carried out the scale sawing and secondly four sides of length direction are carried out thick surely sanding respectively; Make it become six products smooth bright and clean, that specification is consistent through sawing, sanding processing.
3. the manufacturing approach of modified hard reorganization timber according to claim 1 and 2 is characterized in that, utilizes filament cutter to process the veneer bar of 3-5mm the micro veneer leftover bits.
4. the manufacturing approach of modified hard according to claim 1 and 2 reorganization timber is characterized in that, the micro veneer leftover pieces derive from famous and precious seeds, and to become thickness through rotary-cut or slicing be the leftover bits of 0.2-0.8mm veneer.
5. the manufacturing approach of modified hard reorganization timber according to claim 2 is characterized in that the solid content of modifier is 35%, and in modifier, has added anticorrisive agent and fire retardant.
6. the manufacturing approach of modified hard reorganization timber according to claim 2 is characterized in that, has adopted the negative pressure of vacuum perfusion that raw material are carried out modification and has handled.
7. the manufacturing approach of modified hard reorganization timber according to claim 2 is characterized in that unit pressure is 550-650kg/cm in the pressing process
2
8. the manufacturing approach of modified hard reorganization timber according to claim 2 is characterized in that, handles the modified hard reorganization timber of accomplishing the back through production stage (8) heat cure, and its physical index is: density can reach 0.8-1.25g/m
3, burst size of methanal is: 0.1-0.4mg/l, thickness swelling rate≤1.6%; Hardness>=100HRR, MOR>=100MPa, the modulus of elasticity in static bending>=14000MPa; Surface abrasion resistance≤0.06g/100r, heating back size changing rate≤0.03%, plate face, edges of boards nail-holding ability>=5000N.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103231427A (en) * | 2013-05-08 | 2013-08-07 | 国家林业局泡桐研究开发中心 | Method for manufacturing high-density board by using soft fast-growing forest trees |
| CN103395104A (en) * | 2013-07-30 | 2013-11-20 | 苏州香山工坊营造工程有限公司 | Processing method of laminated wood with visual appearance |
| CN105538428A (en) * | 2015-12-08 | 2016-05-04 | 江西省林业科学院 | Method for producing wooden composite board through camphor tree residues |
| CN106363763A (en) * | 2016-08-30 | 2017-02-01 | 安吉博瑞进出口贸易有限公司 | Recombined wood plate with raw wood textures and manufacturing method of recombined wood plate |
| CN106827131A (en) * | 2017-01-09 | 2017-06-13 | 福建农林大学 | A kind of processing method of the bimber stair solid wood column with hollow pattern |
| CN110757607A (en) * | 2019-11-01 | 2020-02-07 | 安徽农业大学 | Novel metal coloring method for palm rattan raw material |
| CN114474267A (en) * | 2022-02-26 | 2022-05-13 | 漳州市桥头木业有限公司 | Corrosion-resistant plywood and preparation method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103231427A (en) * | 2013-05-08 | 2013-08-07 | 国家林业局泡桐研究开发中心 | Method for manufacturing high-density board by using soft fast-growing forest trees |
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| CN103395104A (en) * | 2013-07-30 | 2013-11-20 | 苏州香山工坊营造工程有限公司 | Processing method of laminated wood with visual appearance |
| CN105538428A (en) * | 2015-12-08 | 2016-05-04 | 江西省林业科学院 | Method for producing wooden composite board through camphor tree residues |
| CN105538428B (en) * | 2015-12-08 | 2017-11-14 | 江西省林业科学院 | A kind of method that wood composite board is produced using camphor tree residue |
| CN106363763A (en) * | 2016-08-30 | 2017-02-01 | 安吉博瑞进出口贸易有限公司 | Recombined wood plate with raw wood textures and manufacturing method of recombined wood plate |
| CN106827131A (en) * | 2017-01-09 | 2017-06-13 | 福建农林大学 | A kind of processing method of the bimber stair solid wood column with hollow pattern |
| CN110757607A (en) * | 2019-11-01 | 2020-02-07 | 安徽农业大学 | Novel metal coloring method for palm rattan raw material |
| CN114474267A (en) * | 2022-02-26 | 2022-05-13 | 漳州市桥头木业有限公司 | Corrosion-resistant plywood and preparation method thereof |
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Application publication date: 20120711 |