CN102554980B - Manufacturing method of laminated veneer lumber - Google Patents

Manufacturing method of laminated veneer lumber Download PDF

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Publication number
CN102554980B
CN102554980B CN201210037738.6A CN201210037738A CN102554980B CN 102554980 B CN102554980 B CN 102554980B CN 201210037738 A CN201210037738 A CN 201210037738A CN 102554980 B CN102554980 B CN 102554980B
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China
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veneer
hot pressing
lumber
laminated veneer
laminated
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CN201210037738.6A
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Chinese (zh)
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CN102554980A (en
Inventor
涂登云
彭鹏祥
杜超
杨莎
郑峰峰
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浙江世友木业有限公司
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Publication of CN102554980A publication Critical patent/CN102554980A/en
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Abstract

The invention discloses a manufacturing method of a laminated veneer lumber, which comprises the following steps of: 1) material preparation; 2) carbonization; 3) maintaining; 4) gluing and laying up; 5) cold pressing; 6) hot pressing; 7) edging and sawing; 8) and sanding and packaging. The manufacturing method of the laminated veneer lumber is simple, and the manufactured laminated veneer lumber has good size stability and high structural strength and is not easily deformed.

Description

A kind of manufacture method of laminated veneer lumber

Technical field

The present invention relates to a kind of manufacture method of laminated veneer lumber, relate in particular a kind of method of utilizing fast-growing woods material to manufacture laminated veneer lumber.

Background technology

Along with developing rapidly of China's economy and improving constantly of people's living standard, people are more and more stricter to the performance requirement of home decoration material, and green, ecological, healthy wood materials is welcomed by the people and like again.China is the country of a forest reserves wretched insufficiency; the forest reserves are very poor; according to the 7th forest assessment result of China; the not enough world occupancy volume per person's of China's area of woods per capita 1/4th; add the enforcement of " wildwood protected project ", further aggravated the problem of China's timber resource shortage.For alleviating the nervous problem of timber resources, timber industry starts sight to turn to the artificial fast-growing woods resource becoming increasingly abundant.

Although artificial fast-growing woods material, as poplar, Eucalyptus etc. have advantages of fast growth, the time of becoming a useful person is short, all has the shortcoming that footpath level is little, yielding, size variation is large.How to utilize small diameter grade low-quality fast growing wood to manufacture laminated veneer lumber etc. and substitute the large specification sawn timber use needing by large footpath level log saw system, day by day become emphasis and the focus of current research, because so not only can realize the excellent use of bad material, the large use of small wood, realize the efficient utilization of fast growing wood and widen its application, the contradictory problems of simultaneously also alleviation China being brought by timber shortage also has great importance.

Laminated veneer lumber (being called for short LVL) has even structure, intensity advantages of higher compared with solid wood, can meet the instructions for use in the fields such as timber buildings, bridge, furniture and traffic.Application publication number is CN101947799, Shen Qing Publication day to be the production method that the Chinese invention patent on January 19th, 2011 discloses a kind of laminated veneer lumber, and the process of its making is as follows: the cut open-sanding-packaging and warehousing of block-hot pressing-edging and saw of the preparation-gluing of veneer and assembly-discontinuous precompressed-assembly plate.But, adopt also Shortcomings part of aforementioned production method:

1, in the preparation of veneer, the veneer that adopts the rotary-cut of small diameter grade fast growing wood to go out, due to the huge growth stress existing in fast growing wood, the veneer screwing out is easy to occur the defect such as warpage, distortion, in gluing process, easily cause the inhomogeneous of gluing, thereby cause the waste of the low and adhesive of bonding strength between veneer;

2, while utilizing the laminated veneer lumber that fast growing wood manufactures, because fast growing wood has the shortcoming yielding, of light color, superficial makings is not given prominence to, the problem such as it is poor that the LVL product of making has decorate properties, and the grain of wood is unintelligible and yielding;

3, laminated veneer lumber adopts the assemble pattern of texture single direction, and poor dimensional stability, structural strength are low.

Summary of the invention

The object of this invention is to provide a kind of manufacture method of laminated veneer lumber, its process is simple, and laminated veneer lumber good stability of the dimension, the structural strength of making are high, not yielding.

In order to solve the problems of the technologies described above, technical scheme of the present invention is as follows: a kind of manufacture method of laminated veneer lumber, comprises the following steps:

1) get the raw materials ready; After fast growing wood log cooking is softening, on peeler, be peeled into former veneer, former veneer is cut into veneer as required; Then the water content of veneer is adjusted to 8-20%;

2) carbonization; Veneer is put into hot press hot pressing carbonization, hot pressing temperature 190-210 DEG C, hot pressing pressure is 0-1.5MPa, hot pressing time is 1-5min;

3) health; Veneer after carbonization is cooled to below 80 DEG C, puts into natural conditions or temperature adjustment, damping room carries out health, makes the Veneer moisture after carbonization adjust to 5-10%;

4) gluing and assembly; Veneer after health is carried out to double spread, the veneer after gluing is carried out to assembly, wherein, the second layer of laminated veneer lumber and layer second from the bottom are horizontal assembly, and all the other are rift grain assembly;

5) cold pressing; The laminated veneer lumber that assembly is folded utilizes cold press pre-molding;

6) hot pressing; Utilize hot press hot-forming the laminated veneer lumber of pre-molding;

7) edging and saw cut open; By the surrounding edging of hot-forming laminated veneer lumber, then sawing becomes piece as required;

8) sanding and packaging; Sawing is become to the laminated veneer lumber surrounding sanding of piece, then packaging and warehousing.

As preferably, in described step 4), the thickness of the laminate that the thickness of the laminate that the second layer of laminated veneer lumber is formed by horizontal assembly with layer second from the bottom forms with rift grain assembly is identical.

As preferably, in described step 5), preload pressure is 0.8-1.0MPa, and the time is 1-2h.

As preferably, in described step 6), hot pressing temperature is 110-120 DEG C, and hot pressing pressure is 1.0-1.2MPa, and hot pressing time is 0.3-0.5h.

As preferably, described step 2) in, the heating platen surface temperature of hot press is poor should be less than 5 DEG C.

As preferably, in described step 1), the thickness of described veneer is 1-2mm.

As preferably, in described step 1), described fast growing wood log is Eucalyptus, poplar.

As preferably, the number of plies of described laminated veneer lumber is 6-12 layer.

As preferably, in described step 4), the glue-spread of veneer is 300-320g/cm 2.

As preferably, described step 2) in, 230 DEG C of hot pressing temperatures, hot pressing pressure is 1.0MPa, hot pressing time is 5min.

Beneficial effect of the present invention is:

1) veneer is carried out to carbonization treatment, not only can deepen the color of veneer, improve the definition of texture, reduce aberration, and can discharge and in fast growing wood veneer, have huge growth stress, improve the flatness of veneer, not only can improve the uniformity of gluing, improve the bonding strength of laminated veneer lumber, but also can reduce distortion and the warpage of laminated veneer lumber, strengthen structural strength;

2) assembly has adopted the mode that the second layer and layer second from the bottom are horizontal assembly, and top layer and other layers are the mode of rift grain assembly, further improve dimensional stability and the structural strength of laminated veneer lumber, are not easy distortion.

Brief description of the drawings

Below in conjunction with accompanying drawing, the present invention is described further:

Fig. 1 is the assembly schematic diagram of one embodiment of the invention.

Detailed description of the invention

The following stated is only preferred embodiment of the present invention, not scope of the present invention is limited.

Embodiment, see accompanying drawing 1, the manufacture method of laminated veneer lumber, fast growing wood can adopt poplar, Eucalyptus etc., what present embodiment adopted is Eucalyptus, the number of plies of laminated veneer lumber is at least 6 layers, the number of plies of laminated veneer lumber can be 6, 7, 8, 9, 10, 11, 12...... layer, concrete can select according to actual conditions, the thickness of veneer is 1-2mm, below, taking the preparation method of Eucalyptus laminated veneer lumber as example, describe lower manufacturing process in detail, Eucalyptus laminated veneer lumber gross thickness is 12mm, long is 0.9m, width is 0.5m, the Eucalyptus veneer adopting is 6 layers, Eucalyptus veneer thickness is 1.7mm.

1) get the raw materials ready; After Eucalyptus log cooking is softening, on peeler, be peeled into the former veneer that 1.7mm is thick, then former veneer cut off as required, form Eucalyptus veneer; By naturally drying or drying, the water content of Eucalyptus veneer is adjusted to 8-20%;

2) carbonization; Eucalyptus veneer is put into hot press hot pressing carbonization, hot pressing temperature 190-210 DEG C, hot pressing pressure is 0-1.5MPa, hot pressing time is 1-5min; When hot pressing carbonization, the heating platen surface temperature of hot press is poor should be less than 5 DEG C, to improve the uniformity of Eucalyptus veneer carbonization, can improve dimensional stability, durability and the color of Eucalyptus veneer by carbonization treatment, and the added value that can promote.See attached list 1; Hot pressing pressure in table is that 0MPa represents, only depends on the heating platen deadweight of hot press to compress Eucalyptus veneer.

Table 1 Eucalyptus veneer charing orthogonal test table

3) health; Eucalyptus veneer after carbonization is cooled to below 80 DEG C, and the cooling nature that can adopt is cooling or force coolingly, then cooled Eucalyptus veneer is put into natural conditions or temperature adjustment, damping room carries out health, makes the Veneer moisture after carbonization adjust to 5-10%; When carry out health in temperature adjustment, damping room time, temperature is controlled at 25 ± 3 DEG C, relative humidity 60-70%;

4) gluing and assembly, veneer after health is carried out to double spread, and glue-spread 300 ~ 320g/cm2 carries out double spread to Eucalyptus veneer, and adhesive is mongolicum Turcz. with Modified Starch Adhesive, veneer after gluing is carried out to assembly, and wherein, the second layer of laminated veneer lumber and layer second from the bottom are horizontal assembly, and all the other are rift grain assembly, as can be seen from Figure 1, the laminate being made up of Eucalyptus veneer is for the second time horizontal assembly, remaining laminate being made up of Eucalyptus veneer is all along Eucalyptus grain direction assembly, and two laminate thickness generally equate, do like this, can improve the structural strength of whole laminated timber, after second layer Eucalyptus veneer assembly and after ground floor Eucalyptus baffle plate bonding, form cross one another structure, very firm, after making, be not easy distortion, structural strength is high, in like manner, after second from the bottom Eucalyptus veneer assembly, bond with layer Eucalyptus veneer last, also form cross one another structure, very firm, after making, be not easy distortion, like this, just can make the structural strength of whole laminated timber be improved, in use be not easy distortion, if and the laminate of horizontal assembly is arranged on to top layer, so, structural strength in the longitudinal direction can decline, if laterally the laminate of assembly is arranged on the 3rd layer or the 4th layer etc., the laminate of the two-layer or rift grain assembly of three layers so thereon, structural strength is still not high, easily warp, distortion, fracture.

5) cold pressing; The laminated veneer lumber that assembly is folded utilizes cold press pre-molding; Preload pressure is 0.8-1.0MPa, and the time is 1-2h.

6) hot pressing; Utilize hot press hot-forming the laminated veneer lumber of pre-molding; Hot pressing temperature is 110-120 DEG C, and hot pressing pressure is 1.0-1.2MPa, and hot pressing time is 0.3-0.5h.

7) edging and saw cut open; By the surrounding edging of hot-forming laminated veneer lumber, then sawing becomes piece as required;

8) sanding and packaging; Sawing is become to the laminated veneer lumber surrounding sanding of piece, then packaging and warehousing.

For analyzing the bending resistance of laminated veneer lumber of the present invention, the anti-deformation of product while particularly use product as ground heating timber floor, above-mentioned Eucalyptus laminated veneer lumber and the Eucalyptus laminated veneer lumber that adopts conventional method to make are made into the timber floor of same size, after a simulation floor heating cycle, according to GB/T 6491-1999 Drying quality of sawn timber, the situation of change of, easement curved to timber floor horizontal stroke and crosswise concaving is tested.If the bending resistance of timber floor is poorer, timber floor is at process floor heating week after date, and the flexibility recruitment of timber floor is also just larger.The floor heating cycle of a simulation is by 20 DEG C of temperature and relative humidity 65%, 30 DEG C of temperature and relative humidity 90%, 65% 4 part composition of 20 DEG C of 40 DEG C of temperature and relative humidity 30% and temperature and relative humidity, timber floor bending resistance is stable rear last horizontal curved respectively in above-mentioned 4 environment by contrasting various timber floors, easement, the recruitment of crosswise concaving, result is as shown in table 2, what conventional group represented is the bending resistance test result of Eucalyptus laminated veneer lumber timber floor, what adopt is that usual manner is made, what carbonization group represented is the bending resistance test result of Eucalyptus laminated veneer lumber timber floor, what itself and the conventional difference of organizing were employing is carbonization Eucalyptus veneer, 1-9 organizes the test result of the timber floor of the Eucalyptus laminated veneer lumber of making for 9 groups of above-mentioned employing modes of the present invention.

The bending resistance test result of table 2 Eucalyptus timber floor

As seen from the results in Table 2, compared with conventional Eucalyptus laminated veneer lumber and carbonization Eucalyptus laminated veneer lumber, laminated veneer lumber of the present invention can obviously improve the bending resistance of laminated veneer lumber, when laminated veneer lumber of the present invention uses as ground heating timber floor, also can meet the requirement of product to plate property. ?

Claims (3)

1. a manufacture method for laminated veneer lumber, is characterized in that comprising the following steps:
1) get the raw materials ready; After fast growing wood log cooking is softening, on peeler, be peeled into former veneer, former veneer is cut into veneer as required; Then the water content of veneer is adjusted to 8-20%;
2) carbonization; Veneer is put into hot press hot pressing carbonization, hot pressing temperature 190-210 DEG C, hot pressing pressure is 0-1.5MPa, hot pressing time is 1-5min; The heating platen surface temperature of hot press is poor should be less than 5 DEG C;
3) health; Veneer after carbonization is cooled to below 80 DEG C, puts into temperature adjustment, damping room carries out health, makes the Veneer moisture after carbonization adjust to 5-10%; Carry out health in temperature adjustment, damping room in, temperature is controlled at 25 ± 3 DEG C, relative humidity 60-70%;
4) gluing and assembly; Veneer after health is carried out to double spread, the veneer after gluing is carried out to assembly, wherein, the second layer of laminated veneer lumber and layer second from the bottom are horizontal assembly, and all the other are rift grain assembly; The thickness of the laminate that the thickness of the laminate that the second layer of laminated veneer lumber is formed by horizontal assembly with layer second from the bottom forms with rift grain assembly is identical;
5) cold pressing; The laminated veneer lumber that assembly is folded utilizes cold press pre-molding; Preload pressure is 0.8-1.0MPa, and the time is 1-2h;
6) hot pressing; Utilize hot press hot-forming the laminated veneer lumber of pre-molding; Hot pressing temperature is 110-120 DEG C, and hot pressing pressure is 1.0-1.2MPa, and hot pressing time is 0.3-0.5h;
7) edging and saw cut open; By the surrounding edging of hot-forming laminated veneer lumber, then sawing becomes piece as required;
8) sanding and packaging; Sawing is become to the laminated veneer lumber surrounding sanding of piece, then packaging and warehousing;
In described step 1), the thickness of described veneer is 1-2mm;
In described step 1), described fast growing wood log is Eucalyptus, poplar;
The number of plies of described laminated veneer lumber is 6-12 layer.
2. the manufacture method of a kind of laminated veneer lumber according to claim 1, is characterized in that: in described step 4), the glue-spread of veneer is 300-320g/cm 2.
3. the manufacture method of a kind of laminated veneer lumber according to claim 1, is characterized in that: described step 2) in, 230 DEG C of hot pressing temperatures, hot pressing pressure is 1.0MPa, hot pressing time is 5min.
CN201210037738.6A 2012-02-20 2012-02-20 Manufacturing method of laminated veneer lumber CN102554980B (en)

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CN103171013B (en) * 2013-03-29 2015-04-29 安徽美源装饰科技有限公司 Technique of wood deep carbonation
CN103223688B (en) * 2013-03-29 2015-07-22 浙江世友木业有限公司 Technology for producing novel technical wood
CN103692505B (en) * 2013-12-10 2016-01-20 福建农林大学 A kind of charing glued board and preparation method thereof
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CN105171854A (en) * 2015-08-05 2015-12-23 南京林业大学 Carbonized inflaming-retarding poplar composite board
CN105108839B (en) * 2015-09-08 2017-12-12 河北北方绿野居住环境发展有限公司 wood composite board
CN105459224A (en) * 2015-11-23 2016-04-06 安徽松泰包装材料有限公司 Production technology for thick-core laminated boards
TWI560252B (en) * 2016-06-23 2016-12-01
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101139864A (en) * 2007-10-08 2008-03-12 吴立忠 Wood multi-layer floor composed of cut-plate and veneer and method for making same
CN101274439A (en) * 2007-03-30 2008-10-01 中国国际海运集装箱(集团)股份有限公司 Glued board for container floor
CN101412238A (en) * 2008-12-12 2009-04-22 抚松金秋木业有限公司 Terrestrial heat composite floor and manufacturing method thereof
CN101486212A (en) * 2009-02-25 2009-07-22 南京林业大学 Method for producing compressed charing poplar three-layer wood composite flooring
CN101491907A (en) * 2009-02-18 2009-07-29 广东盈然木业有限公司 Board balance health-preserving chamber and board health-preserving method
CN101704263A (en) * 2009-10-30 2010-05-12 周广龙 Process for manufacturing multi-layer solid wood composite floor
CN102166767A (en) * 2010-12-23 2011-08-31 洋浦超凡实业有限公司 Eucalypt-rubber tree composite high-performance laminated veneer lumber

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100970112B1 (en) * 2006-09-26 2010-07-15 (주)엘지하우시스 Wood flooring with carbonized solid wood using symmetric structure and process for preparing the same
CN201098932Y (en) * 2007-08-02 2008-08-13 陈丰熙 Carbonization wood adhesion laminate
CN101508125B (en) * 2009-04-07 2010-09-29 黄庆邦 Production method of plywood for container bottom board
CN101947799B (en) * 2010-09-02 2013-11-06 南京林业大学 Production method of laminated veneer lumber
CN102179854A (en) * 2011-06-15 2011-09-14 南京林业大学 Method for producing multi-layer solid-wood composite floor by densified poplar single board

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101274439A (en) * 2007-03-30 2008-10-01 中国国际海运集装箱(集团)股份有限公司 Glued board for container floor
CN101139864A (en) * 2007-10-08 2008-03-12 吴立忠 Wood multi-layer floor composed of cut-plate and veneer and method for making same
CN101412238A (en) * 2008-12-12 2009-04-22 抚松金秋木业有限公司 Terrestrial heat composite floor and manufacturing method thereof
CN101491907A (en) * 2009-02-18 2009-07-29 广东盈然木业有限公司 Board balance health-preserving chamber and board health-preserving method
CN101486212A (en) * 2009-02-25 2009-07-22 南京林业大学 Method for producing compressed charing poplar three-layer wood composite flooring
CN101704263A (en) * 2009-10-30 2010-05-12 周广龙 Process for manufacturing multi-layer solid wood composite floor
CN102166767A (en) * 2010-12-23 2011-08-31 洋浦超凡实业有限公司 Eucalypt-rubber tree composite high-performance laminated veneer lumber

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