CN101357470B - Recombination wood and manufacturing method thereof - Google Patents
Recombination wood and manufacturing method thereof Download PDFInfo
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- CN101357470B CN101357470B CN2008101143312A CN200810114331A CN101357470B CN 101357470 B CN101357470 B CN 101357470B CN 2008101143312 A CN2008101143312 A CN 2008101143312A CN 200810114331 A CN200810114331 A CN 200810114331A CN 101357470 B CN101357470 B CN 101357470B
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Abstract
The invention provides a method for manufacturing reconstituted wood. Rotary cut is carried out on the raw wood for preparing a veneer or a veneer strip, defibering is carried out on the veneer, the forming points and/or wood bunch shades or wood bunches of striation crack are formed along the natural texture of wood on the veneer, then dipping, drying and hot pressing for molding the reconstituted wood are carried out. Compared with the prior art, the method solves the problem that wood bunch is irregular; the utilizing rate of wood and production efficiency of wood bunch are increased; defibering process is simplified and energy consumption for defibering is lowered. The process ensures that the cracks on the wood bunch shades and wood bunches are even and that the dipping of wood bunch shades or wood bunches is even in the following dipping process; the product problems such as warp, deformation, jump fibre, and the like, are overcome, which are aroused by uneven defibering in manufacturing wood bunches from raw wood directly by the prior art, and the boards, the surface is very smooth and the mechanical performances such as stiffness and intensity, and the like, are higher than the raw material, are made, therefore the fast-growing forest wood with worse performances and wider source can be made into the products of reconstituted wood which can compare beauty with noble hardwood.
Description
Technical field
The invention belongs to the wood base composite material technical field, relate to a kind of reorganization wood and manufacture method thereof.
Background technology
Wood-based plate basic composition unit is fiber, wood shavings, wood bundle and veneer.The fiberboard and the particieboard that adopt fiber and wood shavings cellular construction to produce, be that the order of wood materials fiber natural alignment is all upset, rearrange again and combine that product has lost the native texture of timber, and the part physical and mechanical property reduces, and has limited its scope of application; And plate veneer unit is had relatively high expectations to the log quality, and along with timber is that the master is the main implementation that changes to utilizing artificial forest by utilizing wildwood, the footpath level of log constantly reduces, the continuous deterioration of material, and the single board utilization of timber has lost competitive advantage gradually.1973, Australian Union's science and the scientist John Douglas Coleman of industrial research institute (CSIRO) are not upsetting original wood fibre orientation, keep under the prerequisite of timber key property, design and developed a kind of product-reorganization wood of similar natural timber, a kind of new construction unit of wood-based plate has been proposed---the wood bundle, and built up the industrial experimentation workshop in nineteen eighty-two, thereafter for many years, their always be devoted to the to recombinate research and improvement of wooden fabrication technique and equipment, the method of this manufacturing wood-based plate is, at first directly discongest the composition construction unit of making reorganization wood through one or more pairs of rollers of discongesting from log, promptly the wood bundle passes through impregnation with the wood bundle then, dry, operations such as hot pressing are made reorganization wood (as shown in Figure 1).The method of making the wood bundle is to discongest by log is carried out roll extrusion, make log split along its rift grain direction in the vertical, discongest through such roll extrusion, a log is just discongested into many fascicular textures unit, then by applying glue on the wood bundle, the sheet material that some wooden Shu Shunwen assemblies, hot pressing are formed again.But owing to obtain the wood bundle in this preparation method, there is some technical difficult problems, make it be difficult to be promoted widely by log is directly prepared the wood bundle by discongesting.Problem is mainly reflected in the following aspects:
1) wood bundle size is irregular.Because the difference of each position material of timber causes wooden area of beam size, length, form easily, discongests degree varies in discongesting process, cause the applying glue inequality in follow-up applying glue operation; Cause the moisture content skewness in the drying process; Cause the inequality of mating formation owing to the bulk density difference in the operation of mating formation, thereby cause a series of problems such as product warpage, distortion, jumping silk.In addition, because wood bundle is irregular, cause product surface uneven easily, the surface of product is often more coarse, is difficult to accomplish very smooth, has limited the purposes of product;
2) timber utilization rate is low.Have knot, defective such as rotten in the log unavoidably, in the process of discongesting, these defectives cause easily and fracture, thereby have reduced the volume recovery of wooden bundle;
3) production efficiency is lower.The footpath level difference of log is discongested the gap of roller and need be adjusted according to the footpath level size of log, has reduced production efficiency;
Summary of the invention
The objective of the invention is to improve the deficiencies in the prior art, a kind of reorganization wood that has better physical and mechanical property compared with the raw material timber that constitutes it is provided.
But another object of the present invention is to provide the manufacture method of high efficiency, the above-mentioned reorganization wood of high quality of production.
The object of the present invention is achieved like this:
Reorganization wood provided by the invention comprises some veneers that become by rounding or derives from the waste single boards that obtains in the timber processing, through in discongesting device, discongesting wood bundle curtain and/or the wood bundle that on its rift grain direction, forms point-like and/or wire crackle, be soaked with adhesive in its surface and the crackle, the sheet material that this wood bundle curtain or wood bundle form through rift grain assembly, hot-press gluing.
Visible crack number that any horizontal linear on the cross-sectional direction of described reorganization wood and the described wire of discongesting formation and/or point-like crackle intersect 2-25 individual/cm between.
The density of this reorganization wood can be 0.70-1.40g/cm
3Between.
The preparation method of reorganization wood provided by the invention is: its raw material is log or derives from the waste single boards that obtains in the timber processing that its step comprises:
A. make wood bundle curtain or wood bundle:
(a) when raw material is log, be about to log through being peeled into veneer, be cut into the veneer of required width again; When raw material is waste single boards, waste single boards is cut into the narrower veneer strip of width;
(b) described veneer or veneer strip are discongested network-like wood bundle curtain or the wood bundle that forms point-like and/or wire crackle in its rift grain direction in discongesting device;
B. wood is restrainted the impregnation of curtain or wood bundle:
Wood is restrainted curtain or wood bundle be immersed in one and fill in the steeping vat of adhesive, make and wrap up in full glue on described wood bundle curtain or the wood bundle, and glue immerses in the crackle of described wood bundle curtain or wood bundle.
C. dry, mat formation, hot pressing:
Wood bundle curtain behind the impregnation or wood bundle are put into drying equipment carry out drying, again will some dried wood bundle curtains or wood restraint behind rift grain direction assembly, place the hot-press equipment hot-press gluing to make sheet material.
In making wood bundle curtain or wooden bundle process, can be:
Rounding is become the thick veneer of 3-8mm, and cutting becomes the veneer of 120-1220mm width, forms described network-like wood bundle curtain through discongesting again.
Wherein rotary-cut is identical with technology and equipment used in the plywood single board preparation process with cutting, all belongs to conventional technology, and the equipment of use also is conventional equipment.
Perhaps, rounding is become the thick veneer of 3-8mm, cutting becomes the veneer strip of 10-120mm width, forms described network-like wood bundle through discongesting.
Perhaps, utilize described waste single boards,, form described network-like wood bundle through discongesting again through being cut into the veneer strip of 10-120mm width.
Above-mentioned wood bundle curtain or wood bundle are characterised in that: the visible crack number that any horizontal linear and the described wire of discongesting formation and/or point-like crackle intersect on described wood bundle curtain or the wooden Shu Zaiqi cross-sectional direction 2-25 individual/cm between.
The generation of described waste single boards can be from:
(1) in the rotary-cut process of veneer, before rounding becomes cylinder, because log shapes is irregular, there are taperingness and flexibility, or because the deviation that centers, can not obtain and the wide continuous veneer of log, and what obtain all is can be waste single boards less than the uneven veneer of length and both sides of the edge of log on interrupted, the width, or because broken veneer and the small width veneer that forms in the rotary-cuts such as defective that timber exists such as rotten, knot, crackle;
(2) in the manufacturing process from glued board, laminated timber, container bottom board etc.In this manufacturing process, veneer breaks in dry run or transportation and the waste single boards that produces.
Now with China annual glued board output 2,515 ten thousand m
3Calculate, according to statistics, the 10%-30% that the total amount of waste single boards accounts for log volume does not wait, and annual China has a large amount of waste single boards to fail to be utilized efficiently.And by the present invention, can be so that these raw materials be effectively used.
In the impregnation step of described wood bundle curtain or wood bundle:
Used adhesive can be synvaren, through the urea-formaldehyde resin adhesive of three chlorocyanamide modifications, or urea-formaldehyde resin adhesive.Solid content in the described adhesive is 15-35%.
What dipping method was concrete can be:
Direct impregnation: adhesive is poured in impregnation pond or the groove, wood bundle curtain after discongesting or wood bundle are placed in the steeping vat, dip time is 3-15min; Perhaps, dipping method can also be:
The negative pressure impregnation: wood bundle curtain after will discongesting or wood bundle place impregnation process jar (vacuum tank), the pressure that is evacuated to behind the closed processes jar in the process tank is-0.05--0.1MPa, continue 2-10min, feed adhesive, after soaking 3-15min, open vacuum tank, wood bundle curtain behind the taking-up impregnation or wood bundle.
Pressure glue dipping: adhesive is placed the impregnation process jar, wood bundle curtain after discongesting or wood bundle are placed the impregnation process jar, be forced into 0.20-0.80MPa after airtight, pressurize 3-15min opens the impregnation process jar after the pressure release, takes out veneer or veneer strip behind the impregnation.
The vacuum pressed impregnation: wood bundle curtain after will discongesting or wood bundle place impregnation process jar (vacuum tank), the pressure that is evacuated to after airtight in the vacuum tank can be-0.05--0.1MPa, can continue 2-10min, feed adhesive, pressurization can be down to 0.20-0.80MPa, dwell time can be 3-15min, opens vacuum tank after the pressure release, wood bundle curtain behind the taking-up impregnation or wood bundle.
The preparation method of reorganization wood provided by the invention is by carrying out rotary-cut with log earlier, make veneer or veneer strip, again this veneer is discongested, form the wood bundle curtain or the wood bundle of point and/or wire crackle in its rift grain direction, make wood bundle than directly rolling with log in its prior art, have the following advantages: (1) has solved the irregular problem of wooden bundle; (2) improved the utilization rate of timber; (3) improved wooden bundle production efficiency; (4) simplified carding process, reduced and discongested energy consumption.Simultaneously, use such technology, make that the crackle on wood bundle curtain or the wood bundle is even, make that in follow-up immersing glue process wood bundle curtain or wood bundle impregnation are even, thus, also make directly that wooden Shu Yin discongests inequality and a series of problems such as the product warpage that causes, distortion, jumping silk with regard to having overcome in the prior art from log.It is very smooth to make the surface, and mechanical performances such as its hardness, intensity are much higher than the sheet material of raw material itself, thus the product of the reorganization wood that can match in excellence or beauty with valuable hardwood with the wider wooden work of fast-growing woods in poor-performing source.
This technology also will have been opened up the new way of efficient a, high added value for residues such as glued board, laminated timber, container bottom boards.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is the process chart of prior art;
Fig. 2 is a process chart of the present invention;
The schematic diagram that Fig. 3 discongests for veneer in the technological process provided by the invention;
Fig. 3 a is that veneer is through the wood bundle curtain structure schematic diagram after discongesting;
Fig. 3 b is that veneer strip is through the wood bundle structural representation after discongesting;
Fig. 3 c is the left TV structure schematic diagram of wood bundle curtain or wood bundle;
Fig. 4 is the structural representation of discongesting thread tooth compression roller in the device;
Fig. 4 a is the left TV structure schematic diagram of Fig. 4;
Fig. 5 is the structural representation of discongesting annular profile of tooth compression roller in the device;
Fig. 5 a is the left TV structure schematic diagram of Fig. 5;
Fig. 6 is the structural representation of discongesting point-like profile of tooth compression roller in the device;
Fig. 6 a is the left TV structure schematic diagram of Fig. 6;
Fig. 7 is the structural representation of discongesting bachelor's shape compression roller in the device;
Fig. 7 a is the left TV structure schematic diagram of Fig. 7;
Fig. 8 is a reorganization timber structure schematic diagram provided by the invention.
The specific embodiment
Further specify concrete feature of the present invention and technological means below in conjunction with accompanying drawing.
Operations (as shown in Figure 2) such as the preparation method of reorganization wood provided by the invention comprises rotary-cut, cutting, discongests, impregnation, drying, assembly are mated formation, hot pressing is characterized in that:
Used raw material is log or waste single boards in described wood bundle curtain or the preparation of wood bundle, and preparation method is:
Rounding is become the thick veneer of 3-8mm, be cut into the veneer of 120-1220mm width, form network-like wood bundle curtain (shown in Fig. 3 a) through discongesting again.
Wherein rotary-cut and cutting used technology and equipment in the plywood single board preparation process all belongs to conventional technology, and the equipment of use also is conventional equipment.
Perhaps, rounding is become the thick veneer of 3-8mm, be cut into the veneer strip of 10-120mm width, form network-like wood bundle (shown in Fig. 3 b) through discongesting.
Perhaps, utilize waste single boards,, form network-like wood bundle through discongesting again through being cut into the veneer strip of 10-120mm width.
Above-mentioned wood bundle curtain or wood bundle are characterised in that: described wood bundle curtain or wood bundle visible crack number that any horizontal linear L on the cross-sectional direction and the described wire of discongesting formation and/or point-like crackle intersect 2-25 individual/cm between (shown in Fig. 3 c).
As shown in Figure 3, discongest a pair of compression roller in the device, its upper and lower settings leaves a gap therebetween, and above-mentioned veneer or veneer strip are entered paired discongesting between the roller along the rift grain direction, and the surface of compression roller is provided with the tooth of discongesting of protrusion; Discongest after the roller by this, make veneer or veneer strip form through discongesting that point splits or line splits or point splits wood bundle curtain or the wood bundle that splits coexistence with line in the rift grain direction.
The surface of described compression roller is provided with discongest tooth can be laid on the compression roller side face, along upwardly extending wire double wedge of roll shaft and/or the point-like double wedge arranged in the axial direction, or helical form double wedge.For example, be the structure of a pair of compression roller that is provided with the helical form double wedge shown in Fig. 4, Fig. 4 a.Be depicted as the annular profile of tooth compression roller that is provided with the wire double wedge as Fig. 5, Fig. 5 a, be provided with annular double wedge in a circumferential direction, some annular double wedges are at the axis direction parallel arrangement of compression roller.Shown in Fig. 6, Fig. 6 a is the compression roller of point-like double wedge, can be that sheathed vertically several have the wheel disc of pointed tooth point on this compression roller, constitutes the point-like double wedge by crown on its circumferential side wall.Be depicted as Fig. 7, Fig. 7 a and be the compression roller of light face on the circumferential side wall, it can constitute paired compression roller device with above-mentioned each compression roller shown in Fig. 4,5,6.
Can be so that wood bundle curtain or wood bundle sheet by a pair of compression roller once, more can roll it for several times.Accordingly, described discongesting in the device can comprise a pair of compression roller, also can be provided with manyly during to compression roller, and the set-up mode of each compression roller can be:
Discongesting tooth and can be the helical form double wedge on the first pair of described compression roller, the back is provided with the compression roller that the point-like double wedge is discongested tooth, and the back is the compression roller with wire double wedge again.Like this, the first pair of compression roller also has the effect of pushing ahead except veneer or veneer strip are had the effect of discongesting, and the helical form double wedge is because the helical form of double wedge is progressive for hobbing of veneer or veneer strip, and it is better to discongest effect.The described compression roller of point-like double wedge can place before the compression roller of wire double wedge, earlier veneer or veneer strip is carried out than the hobbing of small size, and veneer that the point-like crackle is arranged or veneer strip is done the larger area wire again hob, and it is better to discongest effect.Putting in order of the described compression roller of described point-like double wedge and wire double wedge also can be turned around, and wire double wedge compression roller was provided with before point-like double wedge compression roller.The compression roller of point-like double wedge also can be set on primary importance, and the back is provided with the compression roller of wire double wedge.
Described waste single boards can be from:
(1) in the rotary-cut process of veneer.Before rounding becomes cylinder, on the one hand be because log shapes irregular generally all exists taperingness and flexibility; Be because the deviation that centers on the other hand, can not obtain and the wide continuous veneer of log, and what obtain all is can be waste single boards less than the uneven veneer of length and both sides of the edge of log on interrupted, the width, normally broken veneer of waste single boards and small width veneer, the reason that produces is the defective that exists of timber such as rotten, knot, crackle etc., forms waste single boards when rotary-cut;
(2) in the manufacturing process from glued board, laminated veneer lumber, container bottom board.In this manufacturing process, veneer breaks and the waste single boards that produces in dry run or transportation.
What dipping method was concrete can be:
Direct impregnation: solid content can be poured in impregnation pond or the groove for the adhesive of 15-35%, wood bundle curtain after discongesting or wood bundle are placed in the steeping vat, dip time can be 3-15min; Perhaps, dipping method can also be:
The negative pressure impregnation: wood bundle curtain after will discongesting or wood bundle place impregnation process jar (vacuum tank), the pressure that is evacuated to after airtight in the vacuum tank can be-0.05--0.1MPa, can continue 2-10min, feed solid content and can be the adhesive of 15-35%, soak time can be 3-15min, afterwards, open vacuum tank, wood bundle curtain behind the taking-up impregnation or wood bundle.
Pressure glue dipping: solid content can be placed the impregnation process jar for the adhesive of 15-35%, wood bundle curtain after discongesting or wood bundle are placed the impregnation process jar, airtight back pressurization can be down to 0.20-0.80MPa, dwell time can be 3-15min, open vacuum tank after the pressure release, veneer or veneer strip behind the taking-up impregnation.
The vacuum pressed impregnation: wood bundle curtain after will discongesting or wood bundle place impregnation process jar (vacuum tank), the pressure that is evacuated to after airtight in the vacuum tank can be-0.05--0.1MPa, can continue 2-10min, feed solid content and can be the adhesive of 15-35%, pressurization can be down to 0.20-0.80MPa, dwell time can be 3-15min, opens vacuum tank after the pressure release, wood bundle curtain behind the taking-up impregnation or wood bundle.
Adopt negative pressure or/and the purpose of pressure glue dipping to be impregnation more even, adhesive can more effectively be penetrated in the cell membrane and crackle of timber, improves the physical and mechanical property of sheet material.
Drying process can adopt the common drying process of wood-based plate, general drying machine or the dry kiln drying of adopting, to discongest and the wood bundle curtain of impregnation or the wood bundle puts into drying machine or dry kiln carries out drying, dried whole moisture content is controlled at 6%～15%, dry purpose is evaporation wood bundle curtain or the intrafascicular moisture of wood, produces defectives such as bubbling when preventing hot pressing; Increase the resin polymerization degree, to reduce hot pressing time.
Mat formation to adopt and manual mat formation or machinery is mated formation, dried wood bundle curtain or wood bundle by the density weighing of setting, are paved into even, loose banded slab along the natural fiber direction.
The hot-press method of wood-based plate is basic identical in hot-press method and the prior art.
Hot-forming reorganization wood is carried out the sanction at edge and cut, constitute the shape of required product.
Below by concrete use different material embodiment above-mentioned technology is described in detail.
Embodiment 1
Eucalyptus (Eucalyptus urophylla), poplar (Chinese white poplar), China fir (Chinese China fir), pine timber rotary-cuts such as (larches) are formed veneer, its thickness is 4.0mm, through plate shearing machine veneer is cut into certain width (width 120-1220mm), veneer is formed through the squeezing extrusion of two compression rollers up and down that the band point splits or line splits the wood bundle curtain of (or point split with line split).Used compression roller can be a pair of compression roller that is provided with the helical form double wedge, or be provided with a pair of compression roller of the annular profile of tooth of wire double wedge, or be a pair of compression roller of point-like double wedge, obtain visible crack number that any horizontal linear on the cross-sectional direction of wood bundle curtain and the described wire of discongesting formation and/or point-like crackle intersect 5-15 individual/cm between.
Wood bundle curtain after discongesting is placed impregnation process jar (vacuum tank), the pressure that is evacuated to after airtight in the vacuum tank is-0.05--0.1MPa, continue 2-10min, feed modified phenolic adhesive, wherein the adhesive solid content is 20-25%, after soaking 3-15min, open vacuum tank, wood bundle curtain behind the taking-up impregnation, the above-mentioned wood bundle curtain that soaked glue is dried to moisture content under 30-70 degree temperature be 7-12%, carries out hot pressing behind the rift grain assembly, and its heat pressing process is as follows: hot pressing pressure 7-15MPa, hot pressing temperature is 120-160 ℃, and hot pressing time is 1min/mm; Be made into the thick reconstructed material of 20cm.Visible crack number that any horizontal linear (as shown in Figure 8) on the cross-sectional direction of this reorganization wood and the described wire of discongesting formation and/or point-like crackle intersect 5-18 individual/cm between.
The physical mechanics property of table 1 eucalyptus, poplar, China fir and larch reorganization wood
| Sample | Density g/cm 3 | MOR MPa | Elastic modelling quantity MPa | Hardness MPa | Internal bond strength MPa |
| Eucalyptus timber | 0.65 | 100 | 12000 | 45 | - |
| Eucalyptus reorganization wood | 1.10 | 175 | 18600 | 130 | 1.7 |
| Cotton wood | 0.43 | 78.6 | 10400 | 33 | - |
| Poplar reorganization wood * | 0.93 | 83.3 | 8690 | - | - |
| Poplar reorganization wood | 0.80 | 140 | 13700 | 80 | 1.3 |
| Wood of Cunninghamia lanceolata | 0.30 | 72.5 | 10200 | 13 | - |
| China fir reorganization wood | 0.70 | 120 | 1160 | 68 | 1.2 |
| Larch | 0.50 | 79.4 | 12000 | 32 | - |
| Larch reorganization wood * | 0.94 | 90.0 | 12430 | - | - |
| Larch reorganization wood | 0.95 | 145 | 14800 | 105 | 1.5 |
| Toothed oak wood | 0.75 | 118 | 13200 | 73 | - |
| Yellow wingceltis | 0.92 | 151 | 16600 | 103 | - |
(* is the reorganization wood that prior art is made, and data are taken from the wooden fabrication technique of reorganization and learned Jin Weizhu, publishing house of Northeast Forestry University, 1998)
Ginseng is made GB/T17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels " and is detected the sheet material main performance index as density, MOR, elastic modelling quantity, hardness and internal bond strength, and the result is as shown in table 1.
As seen from the above table, the density of artificial fast growing woods such as eucalyptus, poplar, China fir, larch, rigidity, hardness and intensity etc. are all lower, have limited its application; The reorganization wood that uses traditional processing technology to make, its performance increases, and still, increasing degree is limited, and the main mechanical property of product does not still reach the performance indications of high-quality timber.And high-hardness plate provided by the invention, when density was higher than 0.90g/cm3, every mechanical performance indexs such as its rigidity, hardness and intensity had all surpassed toothed oak wood, even had surpassed yellow sandal, had reached the mechanical performance index of high-quality timber.
Embodiment 2
Eucalyptus (Eucalyptus urophylla), poplar (Chinese white poplar), China fir (Chinese China fir), pine timber rotary-cuts such as (larches) are formed veneer, its thickness is 6.0mm, through plate shearing machine veneer is cut into the width veneer strip of 10-120mm, forms that the band point splits or line splits the wood bundle of (or point split with line split) through above-mentioned discongesting.Used compression roller is for being provided with the annular profile of tooth compression roller of wire double wedge shown in Fig. 5, Fig. 5 a, it is provided with annular double wedge in a circumferential direction, and some annular double wedges are at the axis direction parallel arrangement of compression roller.Wood bundle after discongesting and adhesive (solid content is 20-35%) are placed the impregnation process jar, be forced into 0.20-0.80MPa after airtight, pressurize 3-5min opens process tank after the pressure release, takes out the wood bundle behind the impregnation.Veneer behind the taking-up impregnation, the above-mentioned veneer strip that soaked glue and veneer curtain are dried to moisture content under 30-70 degree temperature be 7-12%, carries out hot pressing behind the rift grain assembly, and its heat pressing process is as follows: hot pressing pressure 7-15MPa, hot pressing temperature is 120-160 ℃, and hot pressing time is 1min/mm; Be made into the thick reconstructed material of 38cm.Visible crack number that any horizontal linear (as shown in Figure 8) on the cross-sectional direction of this reorganization wood and the described wire of discongesting formation and/or point-like crackle intersect 10-15 individual/cm between.
Ginseng is made GB/T17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels " and is detected the sheet material main performance index as density, MOR, elastic modelling quantity, hardness and internal bond strength, and the result is as shown in table 2.
The physical mechanics property of table 2 eucalyptus, poplar, China fir and larch reorganization wood
| Sample | Density g/cm 3 | MOR MPa | Elastic modelling quantity MPa | Hardness MPa | Internal bond strength MPa |
| Eucalyptus reorganization wood | 1.00 | 160 | 17000 | 105 | 2.0 |
| Poplar reorganization wood | 0.90 | 150 | 1600 | 95 | 1.8 |
| China fir reorganization wood | 0.90 | 145 | 15600 | 94 | 1.7 |
| Larch reorganization wood | 1.00 | 170 | 18000 | 130 | 1.8 |
Embodiment 3
With the poplar waste single boards of glued board, thickness is 2mm; Plate clone veneer at the bottom of the container, thickness is 2mm; The waste single boards pesudotsuga taxifolia veneer of laminated veneer lumber, thickness is 4mm; Above-mentioned waste single boards is cut into after width is the 10-30mm veneer strip, the a pair of compression roller of the annular profile of tooth of the wire double wedge of use shown in Fig. 5, Fig. 5 a pushes this veneer once, the a pair of compression roller that re-uses the point-like double wedge shown in Fig. 6, Fig. 6 a pushes this veneer once, make on the wood bundle curtain visible crack number that any horizontal linear L on the cross-sectional direction and the described wire of discongesting formation and/or point-like crackle intersect 2-10 individual/cm between.It is discongested to become form that the band point splits or line splits the wood bundle of (or point split with line split), it is to flood 3-5min in the 20-35% phenolic resin glue groove that wood bundle after discongesting is placed on solid content, wood bundle behind the taking-up impregnation, the above-mentioned wood bundle that soaked glue is dried to moisture content under 30-70 degree temperature be 7-12%, behind the rift grain assembly, carry out hot pressing, its heat pressing process is as follows: hot pressing pressure 7-15MPa, and hot pressing temperature is 120-160 ℃, hot pressing time is 1min/mm; Be made into the thick reconstructed material of 38cm.Visible crack number that any horizontal linear (as shown in Figure 8) on the cross-sectional direction of this reorganization wood and the described wire of discongesting formation and/or point-like crackle intersect 6-20 individual/cm between.
In the present embodiment, can also use above-mentioned vacuum pressed impregnation mode, the impregnation of this sample loading mode can be so that have more glue to infiltrate in the slit of wood bundle, the impregnation better effects if, and impregnation efficient is higher.
Ginseng is made GB/T17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels " and is detected the sheet material main performance index as density, MOR, elastic modelling quantity, hardness and internal bond strength, and the result is as shown in table 3.
The physical mechanics property of table 3 poplar, clone's wood and pesudotsuga taxifolia reorganization wood
| Sample | Density g/cm 3 | MOR MPa | Elastic modelling quantity MPa | Hardness MPa | Internal bond strength MPa |
| Poplar reorganization wood | 1.00 | 160 | 17000 | 105 | 2.0 |
| Clone's wood reorganization wood | 0.90 | 150 | 1600 | 95 | 1.8 |
| Pesudotsuga taxifolia reorganization wood | 0.90 | 145 | 15600 | 94 | 1.7 |
Claims (12)
- One kind recombinate wood manufacture method, it is characterized in that: use therein raw material is log or waste single boards, and it comprises:A. make wood bundle curtain or wood bundle:(a) the log process is peeled into veneer, is cut into the veneer or the veneer strip of certain width again; Perhaps waste single boards is cut into the veneer strip of certain width,(b) described veneer or veneer strip are discongested network-like wood bundle curtain of formation or wood bundle in discongesting device;B. wood is restrainted the impregnation of curtain or wood bundle:Wood is restrainted curtain or wood bundle be immersed in one and fill in the steeping vat of adhesive, make and wrap up in full adhesive on described wood bundle curtain or the wood bundle, and adhesive immerses in the crackle of described wood bundle curtain or wood bundle;C. dry, hot pressing:Wood bundle curtain behind the impregnation or wood bundle are put into drying equipment carry out drying, again will some dried wood bundle curtains in the operation of mating formation or wood restraint through the rift grain assembly, place the hot-press equipment hot-press gluing and become sheet material.
- 2. the manufacture method of reorganization wood according to claim 1 is characterized in that: in making wood bundle curtain or wooden bundle process,Rounding is become the thick veneer of 3-8mm, and cutting becomes the veneer of 120-1220mm width, forms network-like wood bundle curtain through discongesting again; Perhaps,Rounding is become the thick veneer of veneer 3-8mm, and cutting becomes the veneer strip of 10-120mm width, forms network-like wood bundle through discongesting; Perhaps,With waste single boards,, form network-like wood bundle through discongesting again through being cut into the veneer strip that width is the 10-120mm width.
- 3. the manufacture method of reorganization wood according to claim 1 and 2 is characterized in that: the visible crack number that any horizontal linear and the wire of discongesting formation and/or point-like crackle intersect on described wood bundle curtain or the wooden Shu Zaiqi cross-sectional direction 2-25 individual/cm between.
- 4. the manufacture method of reorganization wood according to claim 1 and 2 is characterized in that: described waste single boards be from:(a) in the rotary-cut process of veneer because log shapes irregular or because there are defective in the deviation or the timber that center, obtaining on interrupted, the width can be waste single boards less than the uneven veneer of length and both sides of the edge of log, perhaps, have the log of rotten, knot, crack defect from rotary-cut, when rotary-cut, form the waste single boards that hole or crackle are arranged on the plate face; Perhaps,(b) in the manufacturing process from glued board, laminated timber, container bottom board, veneer breaks in dry run or transportation and the waste single boards that produces.
- 5. the manufacture method of reorganization wood according to claim 1 and 2, it is characterized in that: in the impregnation step of wood bundle curtain or wood bundle: used adhesive is a synvaren, or through the urea-formaldehyde resin adhesive of three chlorocyanamide modifications, or urea-formaldehyde resin adhesive.
- 6. the manufacture method of reorganization wood according to claim 1 and 2, it is characterized in that: the solid content of described adhesive is 15-35%.
- 7. the manufacture method of reorganization wood according to claim 5, it is characterized in that: the solid content of described adhesive is 15-35%.
- 8. the manufacture method of reorganization wood according to claim 1 and 2, it is characterized in that: what dipping method was concrete is:Direct impregnation: adhesive is poured in impregnation pond or the groove, will the wood bundle curtain after discongesting or the wood bundle place in the steeping vat and flood; Perhaps, dipping method is:The negative pressure impregnation: wood bundle curtain after will discongesting or wood bundle place the impregnation process vacuum tank, vacuumize after airtight, then, feed adhesive, soak this wood bundle curtain or wood bundle, open vacuum tank again, take out wood bundle curtain or wood bundle behind the impregnation; Perhaps, dipping method is:Pressure glue dipping: adhesive placed the impregnation process jar and discongest after wood bundle curtain or wood bundle place the impregnation process jar, the pressurization of airtight back is soaked, process tank is opened in pressure release then, takes out wood bundle curtain or wood bundle behind the impregnation; Perhaps, dipping method is:The vacuum pressed impregnation: wood bundle curtain after will discongesting or wood bundle place the impregnation process vacuum tank, vacuumize after airtight, then, feed adhesive, and pressure release after a period of time is soaked in pressurization, opens process tank, take out wood bundle curtain or wood bundle behind the impregnation.
- 9. the manufacture method of reorganization wood according to claim 8 is characterized in that:In described direct immersing glue process, dip time is 3-15min; Perhaps,In the negative pressure immersing glue process, the pressure in the described process tank is-0.05--0.1MPa to continue 2-10min, immersion 3-15min behind the feeding adhesive; Perhaps,In the pressure glue dipping process, be forced into 0.20-0.80MPa, pressurize 3-15min; PerhapsIn the vacuum pressed immersing glue process, vacuumize in the described process tank, its pressure is that the pressure that is evacuated in the vacuum tank is-0.05--0.1MPa, continues 2-10min, behind the feeding adhesive, will be forced into 0.20-0.80MPa in the vacuum tank, pressurize 3-15min.
- 10. a reorganization is wooden, it is characterized in that: comprise some veneers that become by rounding or derive from the waste single boards that obtains in the timber processing, through in discongesting device, discongesting wood bundle curtain and/or the wood bundle that on its rift grain direction, forms point-like and/or wire crackle, be soaked with adhesive in its surface and the crackle, the reorganization timber that this wood bundle curtain or wood bundle form through rift grain assembly, hot-press gluing.
- 11. reorganization according to claim 10 wood is characterized in that: described reorganization wood visible crack number that any horizontal linear on the cross-sectional direction and the described wire of discongesting formation and/or point-like crackle intersect 2-25 individual/cm between.
- 12. reorganization wood according to claim 10, it is characterized in that: its density is 0.70-1.40g/cm 3Between.
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