CN102172942A - Method for manufacturing recombined hardwood - Google Patents
Method for manufacturing recombined hardwood Download PDFInfo
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- CN102172942A CN102172942A CN2011100522898A CN201110052289A CN102172942A CN 102172942 A CN102172942 A CN 102172942A CN 2011100522898 A CN2011100522898 A CN 2011100522898A CN 201110052289 A CN201110052289 A CN 201110052289A CN 102172942 A CN102172942 A CN 102172942A
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Abstract
The invention discloses a method for manufacturing recombined hardwood. The method is characterized by comprising the following steps of: a, selecting gum wood with thickness of between 0.5 and 3 millimeters and width of between 5 and 100 millimeters; b, sizing; c, assembling, namely arranging and assembling the gum wood along the length direction; d, performing cold pressing, namely conveying the gum wood into a die of a press to perform cold pressing, wherein the pressure is more than 20MPa; and e, curing, namely heating the die filled with the blank to cure the blank. The sheared or rotary-cut fast-growing low juvenile gum wood or aspen wood of a made forest is used as a production raw material in the method, and the production raw material can be felled in 4 to 8 years, so the using cycle is greatly shortened, and the economic benefit is improved.
Description
Technical field
The present invention relates to a kind of timber and make processing method, especially a kind of processing method of the hardwood of recombinating.
Background technology
At present, because wildwood is forbidden cutting down in China, cause furniture, floor, finishing, the building structure strong wood shortage of material, raw material more than 50% all need dependence on import, because young age, the cross section diameter of fast growing wood was less, be difficult to directly process, only use it for papermaking in the time of mostly or be used for the processing of laminate core.
Because the characteristic of fast growing wood itself, it has following processing difficulties: 1. because the fast growing wood growth is fast, and heart layer and outer field density are inconsistent, density error very easily ftractures during oven dry at 0.15-0.3; 2. the fast growing wood fast knot is too many, and average every square metre can reach up to a hundred, in case drying will come off, and to form diameter be the hole of 1mm to 2mm.With present process technology, usually the fast growing wood of footpath level more than the 3cm is used for rotary cut venner, and the tail material of the following footpath of 3cm level can only break into wood chip, make raw material for MDF, particieboard and papermaking enterprise, the wasting of resources is comparatively serious, in the utilization of the tail material of fast growing wood and waste material, do not bring into play its maximum value yet; 3. the fast knot of fast growing wood is too many, and average every square metre reaches up to a hundred more than, in case these fast knot dryings will come off, forming diameter is the cavity of 1mm-2mm, can only fill up by high pressure and just can produce even, the qualified product of density.
Application number is 200810114331.2 Chinese patent " a kind of reorganization wood and manufacture method thereof the " (applying date: on June 3rd, 2008) at the problems referred to above, but a kind of high efficiency is disclosed, high quality of production has the manufacture method of the reorganization hardwood of better mechanical property, the technical scheme that adopts is: at first be log with raw material or derive from timber and process resulting waste single boards, be cut into the veneer strip (preferable width is 10-120mm) of certain width, after discongesting, device forms network-like wood bundle through discongesting, more successively by the steeping vat impregnation, dry, the operation of hot pressing finally obtains the sheet material that glues together; Improved timber utilization rate and production efficiency, solved the irregular problem of wooden bundle and simplified carding process, the smooth surface of making, utilize surplus material finally to make the added value high product, but still have the following disadvantages:
1. since the thickness of veneer strip usually in 0.5-3mm, itself does not almost have the native texture of timber, adopt such veneer strip after being hot pressed into laminated timber through lamination, the texture of the level that usually only has lamination and produced, and only lamination texture spacing being changed by the angle variation of hacking, the form of texture is single, color and luster is not distinct.
2. because of adopting heat pressing process itself, only exert pressure at the upper and lower faces of raw material, all around or the side have the space, form complete airtight space, cause its physical and chemical index and solid wood gap bigger.
3. because heat pressing process need be put raw material in order, mat formation and just can process after neat, its arrangement or to discongest process loaded down with trivial details; Because hot pressing processing needs continuous processings such as heating, pressurize, cooling, generally, produced one batch of needs 30 minutes to 50 minutes simultaneously, it is longer to take the production time, and production efficiency is lower.
4. adopt hot pressing processing owing to also include heartwood and the sapwood that physicochemical property differs greatly in the clout, when oven dry because the material capability difference of heartwood and sapwood, expanded by heating rate difference, cracking, modification easily.
Summary of the invention
The purpose of this invention is to provide a kind of young age, fast growing wood that cross section diameter is little of utilizing, or has a method of Wood-grain-imitating texture reorganization hardwood by clout, waste material manufacturing that fast growing wood processing is produced, especially use young age, eucalyptus that cross section diameter is little, or add the method that the clout, the waste material manufacturing that produce man-hour have Wood-grain-imitating texture reorganization hardwood by eucalyptus, further, provide a kind of by young age fast growing wood make better the recombinate manufacture method of hardwood of stable material quality
The technical solution adopted in the present invention is: a kind of manufacture method of the hardwood of recombinating may further comprise the steps:
A, selection thickness between 0.5mm-3mm, the Eucalyptus of width between 5mm-100mm;
B, applying glue;
C, assembly are forward arranged assembly with Eucalyptus along its length direction;
D, cold pressing, Eucalyptus is sent in the mould of press and colded pressing, described pressure is greater than 20MPa;
The mold heated that blank is housed is solidified in e, curing.
In step c, Eucalyptus is along its length direction assembly that forward is staggered.
Described Eucalyptus forward is provided with drift angle less than 45 ° along its length direction.
Further comprising the steps of:
Impregnation with drying yate, and sticks with glue agent and soaks full;
Oven dry is lower than 16% with the drying yate after the applying glue to moisture, and described baking temperature is less than 60 ℃;
In step c, assembly can adopt one of following manner:
1. the carbonization Eucalyptus is mixed with non-carbonization Eucalyptus and mat formation, length direction is stack alternately;
2. non-carbonization Eucalyptus is superposeed along its length direction;
3. the carbonization Eucalyptus is superposeed along its length direction;
4. carbonization Eucalyptus and non-carbonization Eucalyptus length direction alternately after the stack, are superposeed by the short sheet of veneer of machine direction perpendicular to the Eucalyptus length direction, the balance layer of formation again.
Described mould inner membrance is the Baltimore groove of both ends open, and described bottom land and cell wall angle are that radius is the fillet of R, 3mm≤R≤20mm.
Described Eucalyptus by young age eucalyptus after shearing, make.
In step c, assembly can adopt one of following manner:
1. the carbonization Eucalyptus is mixed with non-carbonization Eucalyptus and mat formation, length direction is stack alternately;
2. non-carbonization Eucalyptus is superposeed along its length direction;
3. the carbonization Eucalyptus is superposeed along its length direction;
4. carbonization Eucalyptus and non-carbonization Eucalyptus length direction alternately after the stack, are superposeed by the short monolithic of machine direction perpendicular to the Eucalyptus length direction, the balance layer of formation again.
Described mould inner membrance is the Baltimore groove of both ends open, and described bottom land and cell wall angle are that radius is the fillet of R, 3mm≤R≤20mm.
Described mould inner membrance is the Baltimore groove of both ends open, and described bottom land and cell wall angle are that radius is the fillet of R, 3mm≤R≤20mm.
Because Eucalyptus is sheared by children eucalyptus in age and is made, not only can overcome the defective that young age, Eucalyptus can't batch machining be produced, widened the age of tree restriction of raw material trees, utilize short, the characteristics that cost is low of eucalyptus growth cycle in young age simultaneously, improved production efficiency.
Wherein, speed was given birth to wood and was meant that the age of tree is that Eucalyptus or the speed in 2 years to 8 years is given birth to wood young age Eucalyptus or young age.
In sum, owing to adopted technique scheme, the invention has the beneficial effects as follows:
1, since this method be utilize the speed of artificial forest give birth to young age Eucalyptus poplar is sheared or rotary-cut after as raw materials for production, only need the 4-8 year just can cut down as raw materials for production, shortened life cycle widely, increase economic efficiency.
With Eucalyptus or be raw material in young age by the Eucalyptus clout that the Eucalyptus veneer is produced during fabrication, will can only abandon in the prior art or change the waste material that uses it for anything else and utilize again, make the reorganization hardwood that physics, chemical index are better than solid wood.
2, utilize thickness between 0.5mm-3mm, the young age Eucalyptus or by Eucalyptus clout manufacturing reorganization hardwood of width between 5mm-100mm, because the size difference of strip Eucalyptus raw material during assembly own, it puts in order in disorder simultaneously, get mutual extrusion between the Eucalyptus raw material during pressurization, and in mould, realize relative to disorderly moving, make it to form each the angle on the solid space to the angle variation; Further, corresponding angle is set between each Eucalyptus when assembly, material is machining the abundant emulation texture of back formation, and common parallel grain in this emulation texture difference and the prior art, have the texture of bending or annular more, simulate the lines that is similar to " Door frame " and natural timbers such as " rosewoods ".
3, during fabrication, can be by regulating the ratio of carbonization Eucalyptus and non-carbonization Eucalyptus, and according to a certain percentage behind the mixing match, mix required color and luster, and arrange in pairs or groups out the required true qualities and the aberration of lines, make that the reorganization hardwood color and luster that produces is abundant, attractive in appearance more.
4, the density of material raises along with pressure and increases, because after density surpassed the density of Eucalyptus itself, material monolithic density reached unanimity, the cherry wood material density that finally processes is higher than characteristics such as common wood and tool stable material quality, homogeneous.
5, adopt " heat cure of colding pressing " technology, be different from hot pressing die only last, following two surfaces have binding face, cold stamping die all seals on all directions and forms airtight die cavity, can be in solid space between each Eucalyptus bar mutual extrusion, on the formation solid space each is to the angle that changes naturally, make the material after hacking have colourful natural texture, simultaneously, because cold presswork all is applied with pressure to raw material on the mould inside all directions, when the reorganization of exerting pressure forms texture, curl during the raw material pressurized of strip and twine mutually, formation is similar to the winding form of rope, and the physical property of finished product is compared with the finished product of processing through hot pressing and improved a lot.
6, choose from the Eucalyptus raw material of the middle strip of cutting off of eucalyptus, and because Eucalyptus raw material width is little, the quantity of its fast knot significantly reduces, the reorganization hardwood be processed into of the Eucalyptus that after shearing, obtains thus, overcome that fast knot is to the influence of end product quality when directly utilizing common Eucalyptus rotary-cut to obtain veneer, density, hardness are all better relatively.
Description of drawings
Fig. 1 is the reorganization hardwood that common young age, Eucalyptus was made.
The reorganization hardwood that Fig. 2 makes after for the Eucalyptus assembly after the carbonization.
The reorganization hardwood that Fig. 3 forward forms behind the assembly for common Eucalyptus.
The specific embodiment
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
Manufacture method of the present invention comprises the steps:
(1) selection is chosen thickness between 0.5mm-3mm, the Eucalyptus small width veneer bar of width between 5mm-100mm, and preferred, length is more than 10 times of width, is preferably between the 30mm-2600mm, the shape of each small width veneer bar is not of uniform size fixed identical.
Wherein, the Eucalyptus raw material can be:
1. when making veneer, after rotary-cut or slicing operation, remaining thin material or be difficult to continue to be processed into the remainder of veneer;
2. choose the age of tree and be the Eucalyptus in young age in 2 years to 4 years, and shear along its short transverse and to form;
3. select width, the small width veneer bar of thickness in size range according to specified conditions; For example according to the close veneer strip of the selected density of required density; Or, select the veneer strip of corresponding color and luster according to required background color and lines color.
Can be tabular, strip veneer, bulk etc. as the Eucalyptus raw material of raw material, the shape between each Eucalyptus, size can be variant in it allows size range.
(2) drying handles moisture to below 12%.
(3) dyeing is according to processing such as material applications dye.
(4) carbonization is sent Eucalyptus into carbonization in carbonization jar or the carbonization kiln.
(5) impregnation is with the true qualities Eucalyptus or through carbonization, dried Eucalyptus impregnation, the applying glue amount of solid is 7-9%.
(6) oven dry is carried out low temperature drying below 60 ℃ to moisture below 16% with the Eucalyptus behind the impregnation.
Wherein, the impregnation in above-mentioned steps (5) and (6), baking step also can adopt corresponding manners such as plastic roll, spray glue to substitute.
(7) assembly, with the Eucalyptus of different size according to the quantitative assembly of required density of material; Assemble pattern is with Eucalyptus length assembly forward, and is disorderly relatively adjacent naturally between each Eucalyptus.
Wherein, the length and width of each Eucalyptus, thick size but can be incomplete same all in respective range.Preferably, assemble pattern can adopt along the Eucalyptus length direction form assembly of spending drift angles less than 45 is set.
One of when Eucalyptus is superposeed assembly, can be in the following ways:
1. the carbonization Eucalyptus mixes with non-carbonization Eucalyptus and mats formation, and length direction is stack alternately; Adopt such assemble pattern, can form the identical natural texture material of the depth.Simultaneously, the shade of finished product also can be controlled according to the ratio of carbonization Eucalyptus.
2. non-carbonization Eucalyptus length direction stack; Adopt such assemble pattern, can form the natural texture of material true qualities.
3. carbonization Eucalyptus length direction stack; Adopt such assemble pattern, can form copper-colored natural texture.
4. carbonization Eucalyptus and non-carbonization Eucalyptus length direction are alternately superposeed behind the several layers, the one deck that superposes again at least is by the short monolithic of some machine directions perpendicular to the former, the balance layer of formation; Adopt such assemble pattern, when forming texture some groups repeatedly, form more stable structure form.
(8) blank being sent press be pressed into can consolidate in the mould of type, apply high pressure greater than 20MPa, blank obtains after by the Eucalyptus assembly, by high pressure, the Eucalyptus material is because assembly or the size difference of Eucalyptus own are formed on the moving relative to disorder in the mould, make mutual extrusion between the Eucalyptus, form each angle that changes to angle on the solid space, and because the formation of angle, material forms colourful natural texture in the parallel back of hacking.Owing to the density of material increases along with pressure raises, after density surpassed the density of Eucalyptus itself, material monolithic density reached unanimity, and obtains having the homogeneous hardwood material of higher density.
(9) solidify, the mould that blank is housed is sent into to solidify in road or the solidying kiln be heating and curing.
(10) discharging is laid down pin, is deviate from material and promptly obtain the cross section texture-rich, the uniform hardwood material of material.
In manufacture process, according to required reorganization hardwood color and luster and lines difference, select corresponding assembly and selection mode discriminatively, to form nature emulation lines as required, and can be according to the needs of product to texture, adopt different cutting modes to produce different textural characteristics, as flat grain and the edger-grain and the different textural characteristics of rotary-cut texture of timber.
Embodiment 1:
Eucalyptus and cut into thickness between 0.5mm-3mm in young age is chosen in a, selection, and width does not wait between 5mm-59mm, and veneer strip is dried to moisture below 12%; Wherein young age, eucalyptus was meant eucalyptus in young age; Generally, young age, eucalyptus was meant that the age of tree is the eucalyptus in 2 to 8 years.
B, applying glue, applying glue amount of solid are 9%, again and the veneer strip that will apply glue carry out low temperature drying below 60 ℃ to moisture below 16%;
C, assembly, veneer strip is quantitative according to the density of material of setting, and the assembly that superposes; Assemble pattern be with veneer strip with length direction assembly forward, disorderly relatively adjacent naturally between the veneer;
D, cold pressing, Eucalyptus is sent in the mould of press and colded pressing, described pressure is greater than 20MPa; Wherein the inner membrance of mould is the Baltimore groove of both ends open, described bottom land and cell wall angle are that radius is the fillet of R, 3mm≤R≤20mm, when colding pressing, owing to be provided with the fillet of radius with cell wall at the bottom of the Baltimore groove greater than 3mm, lamination in hot pressing in the material base bends in compression and moves, and forms the identical arc Wood-grain-imitating of bending direction at the laminated timber cross section.
The mold heated that blank is housed is solidified in e, curing;
F, deviate from material, the reorganization hardwood color and luster that processes evenly and lines mostly be the simulation of natural texture of curve.
The reorganization hardwood physics and the chemical property that process thus are as shown in table 1:
The physicochemical property table of the reorganization hardwood that table 1 is made by common Eucalyptus
Embodiment 2:
A, selection pick the Eucalyptus clout that produces when making veneer, the thickness of Eucalyptus clout between 0.5mm-3mm, the veneer strip clout that width does not wait between 5mm-100mm;
B, applying glue;
C, assembly, with the carbonization Eucalyptus along its length direction stack assembly;
D, cold pressing, Eucalyptus is sent in the mould of press and colded pressing, described pressure is greater than 20MPa;
The mold heated that blank is housed is solidified in f, curing.
The reorganization hardwood physics and the chemical property that process are as shown in table 2:
The physicochemical property table of the reorganization hardwood that the Eucalyptus clout assembly of table 2 after by carbonization made
Behind the Eucalyptus clout compressive deformation after the carbonization, combine, form the bigger sheet carbonization part of aberration with the true qualities clout, final for being similar to the Wood-grain-imitating of " Door frame ".
At last, can be according to processing such as material applications dye, or finished product sent into carbonization in carbonization jar or the carbonization kiln, realized the adjusting of whole color and luster.
For the stability that makes finished product and physical property reach optimum, during selection can with raw material according to the density selection after assembly as required, realize the global density unanimity, make the material capability of finished product more stable.
As equivalent embodiment of the present invention, poplar and Eucalyptus all belong to fast growing wood, and physicochemical property is similar, and through experiment, utilize poplar processing clout or the footpath of the little tree after shearing poplar to produce according to the method described above, also can be made into corresponding reorganization hardwood, only difference to some extent on physicochemical property does not repeat them here.
The present invention is not limited to the aforesaid specific embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (10)
1. the manufacture method of the hardwood of recombinating is characterized in that: may further comprise the steps:
A, selection thickness between 0.5mm-3mm, the Eucalyptus of width between 5mm-100mm;
B, applying glue;
C, assembly are forward arranged assembly with Eucalyptus along its length direction;
D, cold pressing, Eucalyptus is sent in the mould of press and colded pressing, described pressure is greater than 20MPa;
The mold heated that blank is housed is solidified in e, curing.
2. the manufacture method of reorganization hardwood according to claim 1 is characterized in that, and is further comprising the steps of:
In step c, Eucalyptus is along its length direction assembly that forward is staggered.
3. the manufacture method of reorganization hardwood according to claim 2 is characterized in that: described Eucalyptus forward is provided with drift angle less than 45 ° along its length direction.
4. according to the manufacture method of the described reorganization hardwood of arbitrary claim in the claim 1 to 3, it is characterized in that, further comprising the steps of:
Impregnation with drying yate, and sticks with glue agent and soaks full;
Oven dry is lower than 16% with the drying yate after the applying glue to moisture, and described baking temperature is less than 60 ℃.
5. according to the manufacture method of the described reorganization hardwood of arbitrary claim in the claim 1 to 3, it is characterized in that:
In step c, assembly can adopt one of following manner:
1. the carbonization Eucalyptus is mixed with non-carbonization Eucalyptus and mat formation, length direction is stack alternately;
2. non-carbonization Eucalyptus is superposeed along its length direction;
3. the carbonization Eucalyptus is superposeed along its length direction;
4. carbonization Eucalyptus and non-carbonization Eucalyptus length direction alternately after the stack, are superposeed by the short sheet of veneer of machine direction perpendicular to the Eucalyptus length direction, the balance layer of formation again.
6. according to the manufacture method of the described reorganization hardwood of arbitrary claim in the claim 1 to 3, it is characterized in that: described mould inner membrance is the Baltimore groove of both ends open, and described bottom land and cell wall angle are that radius is the fillet of R, 3mm≤R≤20mm.
7. according to the manufacture method of the described reorganization hardwood of arbitrary claim in the claim 1 to 3, it is characterized in that: described Eucalyptus by young age eucalyptus after shearing, make.
8. the manufacture method of reorganization hardwood according to claim 4 is characterized in that: in step c, assembly can adopt one of following manner:
1. the carbonization Eucalyptus is mixed with non-carbonization Eucalyptus and mat formation, length direction is stack alternately;
2. non-carbonization Eucalyptus is superposeed along its length direction;
3. the carbonization Eucalyptus is superposeed along its length direction;
4. carbonization Eucalyptus and non-carbonization Eucalyptus length direction alternately after the stack, are superposeed by the short monolithic of machine direction perpendicular to the Eucalyptus length direction, the balance layer of formation again.
9. the manufacture method of reorganization hardwood according to claim 4 is characterized in that: described mould inner membrance is the Baltimore groove of both ends open, and described bottom land and cell wall angle are that radius is the fillet of R, 3mm≤R≤20mm.
10. the manufacture method of reorganization hardwood according to claim 5 is characterized in that: described mould inner membrance is the Baltimore groove of both ends open, and described bottom land and cell wall angle are that radius is the fillet of R, 3mm≤R≤20mm.
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| CN106738112A (en) * | 2017-02-05 | 2017-05-31 | 四川麦笠机械设备有限公司 | A kind of heavy wood material suppressed with veneer and preparation method thereof |
| CN112659279A (en) * | 2020-12-04 | 2021-04-16 | 中国林业科学研究院木材工业研究所 | Wood recombinant material and preparation method thereof |
| CN112659279B (en) * | 2020-12-04 | 2023-08-25 | 中国林业科学研究院木材工业研究所 | Wooden recombinant material and preparation method thereof |
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