CN106881755B - Hot binding steam spraying method compacted wood/bamboo wood method and compacted wood/bamboo wood - Google Patents
Hot binding steam spraying method compacted wood/bamboo wood method and compacted wood/bamboo wood Download PDFInfo
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- CN106881755B CN106881755B CN201710108674.7A CN201710108674A CN106881755B CN 106881755 B CN106881755 B CN 106881755B CN 201710108674 A CN201710108674 A CN 201710108674A CN 106881755 B CN106881755 B CN 106881755B
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- bamboo wood
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/007—Treating of wood not provided for in groups B27K1/00, B27K3/00 using pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K9/00—Chemical or physical treatment of reed, straw, or similar material
- B27K9/002—Cane, bamboo
Abstract
The invention discloses a kind of methods of hot binding steam spraying method compacted wood/bamboo wood, include the following steps: to install high pressure resistant high temperature resistant Vented metal plate additional on the upper lower platen of the hot press of carrying vapour spray orifice, the smooth of Vented metal plate faces outwardly, it is contacted with over-topped/bamboo wood, and upper lower platen is warming up to 160-220 DEG C, and be always maintained at the temperature of lower platen in the next steps；Moisture content is placed on the lower platen of the press in 8% to 30% timber/bamboo wood；Lower platen in quick-make stops closure when top board touches over-topped/bamboo wood and acts on and has certain pressure, and opens high steam and steamed；It is slowly closed above-mentioned upper lower platen, steams and carry out simultaneously, stop pressing plate closure when over-topped/bamboo wood thickness reduction arrives required thickness, maintenance in situ, steam-injection while carrying out；Stop steaming, and open the air suction function of aperture on upper lower platen, excessive moisture and extract gas is discharged.
Description
Technical field
The present invention relates to field of material preparation, and in particular to a kind of hot binding steam spraying method compacted wood/bamboo wood
Method and compacted wood/bamboo wood.
Background technique
In woodwork industry, high-intensitive wood raw material is always what people were pursued, however has high-intensitive wood
Material raw material is always limited in natural resources, and expensive.Therefore Wood Science men attempt through timber densification
Technique improve density of wood, low-density, resourceful and cheap low-density timber are become highdensity, high-intensitive
Timber.There are report (Fang the et al.2011,2012a, 2012b, 2012c of many timber densifications in historical document；
Boonstra and Blomberg 2007；Fukuta et al.2008a；Gabrielli and Kamke 2008；
Higashihara et al.2000；Inoue et al.1993a；Inoue et al.1993b；Inoue et al.2008；
Ito et al.1998b；Kamke 2006；Kollmann 1936；Kollmann et al.1975；Navi and Heger
2004；Seborg et al.1945), the patent of timber densification it is also very much (Sears, 1900；Walch and Watts,
1923；Oleheimer,1929；Brossmannes,1931；Esselen,1934；Olson 1934；Huang Rongfeng etc. 2011,
2013).But due to many disadvantages, the industrial application of compacted wood or extremely limited.These techniques mainly have chemistry side
Method and mechanical means.The major defect of chemical method includes:
1) it cannot be guaranteed that timber natural characteristic；
2) it influences timber to recycle again or natural degradation, pollute the environment；
3) higher cost.
Therefore, from the angle of environmental protection, physical mechanical method just more meets environmental protection concept of today.Existing machinery in the world
The major defect of method includes:
1) complex process, time are long；
2) the current methods being mainly engaged in the laboratory of timber densification several in the world are limited to the examination of small size mostly
Material；
3) size caused by Mechanical Method compacted wood springs back problem；
4) some can reduce size rebound using high-temperature process (190~230 degrees Celsius) and sufficiently long time, and high temperature is long
Time-triggered protocol damages Wood mechanical property, especially wood surface, often results in partially carbonized, or causes color very
Deep and shade is widely different, usually compressed wood is allowed not to be available at all.
5) using high-temperature steam can be relieved above 4) in the subproblem mentioned, but since timber is in hot pressing iron plate high pressure
Under, steam is difficult uniformly (or even can not) to be applied to the compression face of suppressed tree material, especially when timber compression face is larger.
6) steam fumarole (my previous experiments) is distributed on hot pressing iron plate and can alleviate above some for some hot presses
5) the problem of mentioning, can steam still can not accomplish to be evenly distributed to compression wood surface, and timber under high pressure can protrusion
To in spray orifice, many salient points are caused in compression wood surface.
Problems above all limits the application of compressed wood commercially in different degrees of and different aspect.Therefore have very much
Necessity continues how to solve these problems is explored.
Bamboo is one of renewable biological source important on the earth, and growth cycle is short, is become a useful person fast, has been obtained in recent years big
Amount application.Bamboo wood has very high mechanical strength, and the elasticity modulus under its unit intensity can compare favourably with steel, however, bamboo
Laterally the density and mechanical strength of (from bamboo blueness to tabasheer) and longitudinal (founding bamboo base portion to ending) are widely different for material, so as to cause
The highly non-uniform property of integration engineering plate internal density and mechanical strength made of raw bamboo, can not compare favourably, greatly with steel
The utilization of raw bamboo is constrained greatly.In addition, due to arc-shaped, the bamboo cane regular in order to obtain in bamboo chip process of bamboo wall, wave
Take a large amount of bamboo material.Although and common Recombined bamboo can obtain high density and relatively uniform plate, this kind of product need
It to be largely glued, pole is not environmentally.The above problem can be overcome by bamboo wood physicomechanical processes densification, it is possible to produce novel height
Strength products utilize one new direction of developing to bamboo wood.
Summary of the invention
The object of the present invention is to provide a kind of methods of hot binding steam spraying method compacted wood/bamboo wood and close
Realification timber/bamboo wood simplifies process flow, reduces the process time；Timber/bamboo wood colour consistency after improving densification,
Prevent timber/bamboo wood carbonization；It improves steam being uniformly distributed on over-topped/bamboo wood and permeates to reach and reduce over-topped/bamboo
The moisture absorption of material is sprung back；Compacted wood/bamboo wood surface property (surface salient point caused by eliminating because of steam fumarole) is improved, is reduced
Rebound.
To achieve the above object, the technical scheme adopted by the invention is as follows:
Hot binding steam spraying method compacted wood/bamboo wood method, includes the following steps:
S1, high pressure resistant high temperature resistant Vented metal plate is installed additional on the upper lower platen of the hot press of carrying vapour spray orifice, gold of breathing freely
Belong to the smooth of plate to face outwardly, be contacted with over-topped/bamboo wood, and upper lower platen is warming up to 160-220 DEG C, and in the next steps
It is always maintained at the temperature of lower platen；
S2, by moisture content 8% to 30% timber/bamboo wood or by the timber of high temperature saturated vapor pre-softening/
Bamboo wood is placed on the resulting press lower platen of step S1；
Lower platen on S3, quick-make, the stopping when top board touches over-topped/bamboo wood and effect has certain pressure
Closure (purpose is that over-topped/bamboo wood is mobile when preventing from steaming), and open high steam to over-topped/bamboo wood upper and lower surface into
Row steams；
S4, it is slowly closed above-mentioned upper lower platen, steams while carried out, when over-topped/bamboo wood thickness reduction is required for
Thickness when stop pressing plate closure；
S5, pressing plate maintain in situ, to steam while carrying out after stopping closure；
S6, stop steaming, and open the air suction function of aperture on upper lower platen, be discharged excessive moisture and timber/bamboo wood because
High temperature and the extract gas generated, stop suction function after 1 to 2 minutes, and the aperture venting channels on pressing plate are naturally unimpeded, makes
It is consistent to obtain pressing plate inner and outer air pressure, lower platen in unlatching takes out over-topped/bamboo wood.
For timber/bamboo wood densification hot press with steam-injection hole in the step S1, and there is the function of air-breathing exhaust
Energy.
The Vented metal plate using sintering filter screen, and the face that is contacted with over-topped/bamboo wood it is relatively flat smooth and
Steam can effectively be penetrated.
The present invention also provides close obtained by above-mentioned hot binding steam spraying method compacted wood/bamboo wood method
Realification timber/bamboo wood.
The invention has the following advantages:
Process flow is simplified, the process time is reduced；Timber/bamboo wood colour consistency after improving densification, prevents wood
Material/bamboo wood carbonization；It improves steam being uniformly distributed on over-topped/bamboo wood and permeates to reach and reduce the suction of over-topped/bamboo wood
Wet rebound；Compacted wood/bamboo wood surface property (surface salient point caused by eliminating because of steam fumarole) is improved, rebound is reduced.
Detailed description of the invention
Fig. 1 is densification of embodiment of the present invention process schematic；
In figure: pretreatment (T0~T1), compress (T1~T2), and post-processing (T2~T3)。
Fig. 2 is the structural schematic diagram of top board, lower platen in the embodiment of the present invention.
Fig. 3 is the attachment structure schematic diagram of top board, lower platen and Vented metal plate in the embodiment of the present invention.
Specific embodiment
In order to which objects and advantages of the present invention are more clearly understood, the present invention is carried out with reference to embodiments further
It is described in detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to limit this hair
It is bright.
Fig. 1 be densification process schematic, densification equipment used be steam injection pressing all-in-one machine, such as Fig. 2, top board, under
Be evenly distributed with aperture on pressing plate, aperture can spray steam can also air-breathing (discharge steam), heating platen surrounding can install sealing additional
(densification efficiency can be improved) in equipment.All densification processes can be completed once on the same device, can also be by pretreatment with after
Processing is separately handled in other equipment.Pretreated effect softens timber/bamboo wood before being hot pressing, is convenient for hot pressing.After
The effect of reason is to prevent or reduce the rebound of compressed wood/bamboo wood for the timber after hot pressing/bamboo wood setting and drying.Hot pressing
In high-pressure and high-temperature steam be also provided simultaneously with softening and setting effect, and can prevent or reduce high temperature to timber/bamboo wood
Carbonization, carbonization not only substantially reduce compressed wood/bamboo wood mechanical property, but also timber/bamboo wood is caused to darken blackening
It is not available compressed wood/bamboo wood.Steam-injection in whole process can also make the interior external enwergy of pressed material while be rapidly heated, inside and outside
The temperature difference is small.Whole process is controlled by computer software, and program (including the heating platen temperature of whole process is set in computer
When degree, spacing, heating platen open and close, and heating platen opens and closes speed, and when vapour pressure starts and stop spraying steam, when siphon away steaming
Vapour etc.), entire to soften after being put into the timber/bamboo wood for needing densification, hot pressing steams, and the processes such as post-processing are by automatic running.
In hot pressing, since powerful pressure acts on, timber/bamboo wood of corresponding position at hole is steamed due to not pressed
Often meeting protrusion fills in steam-injection hole for plate contact, to largely effect on distribution and infiltration of the steam on over-topped/bamboo wood.In order to solve
This problem is added to high-intensitive high pressure resistant corrosion-and high-temp-resistant Vented metal plate (sintering filtering on the surface of upper lower hot pressing board
Net, material are 316L or 304 stainless steels) (Fig. 3), the microscopic spaces interconnected in a crisscross manner, steam are dispersed in metal plate
Metal plate can be passed through completely, so that steam be made to can be uniformly dispersed each position of over-topped/bamboo wood.Alloy air permeable plate and hot pressing
The not exigent smooth degree in face of plate contact, the side contacted with suppressed tree/bamboo wood is required to be smooth smooth, does so
Final compacted wood/bamboo material surface out is very smooth, this has been fully achieved in Vented metal plate used in present example
The requirement of sample.This invention not only greatly improves uniform publication of the steam on over-topped/bamboo wood, improves softening and setting effect
Fruit prevents the carbonization of over-topped/bamboo material surface and the inconsistent problem of color, these be before timber/bamboo wood hot pressing
It is difficult to overcome the problems, such as in densification.
Specific embodiments of the present invention are as follows:
S1, to install high pressure resistant high temperature resistant Vented metal plate additional on the upper lower platen of the hot press of carrying vapour spray orifice (sintered
Strainer), the smooth of mesh sheet is faced outwardly and (is contacted with over-topped/bamboo wood), and pressing plate is warming up to 160-220 DEG C.
S2, moisture content is placed in 8% to 30% or so timber/bamboo wood (or by timber/bamboo wood of pre-softening)
On press lower platen (include Vented metal mesh sheet, hereinafter pressing plate).Timber/bamboo wood of pre-softening, which can be, passes through high temperature
The method of saturated vapor softens, and concrete operations are that timber/bamboo wood is put into hermetically sealed can, the saturation of 160 to 200 degrees Celsius of injection
Steam is softened, and according to timber/bamboo wood size, the softening time can be a few minutes to more than ten minutes.
S3, quickly closure heating platen is (in 30 seconds) to reduce timber/bamboo wood loss of water caused by high temperature, when pressing plate connects
It contacts over-topped/bamboo wood and acts on and stop closure when having certain pressure (purpose is that over-topped/bamboo wood is mobile when preventing from steaming),
And open high steam and over-topped/bamboo wood upper and lower surface is steamed, the purpose of this process is to carry out high temperature steaming to being pressurized
Vapour emollescence is convenient for subsequent compression, and the time depends on over-topped/bamboo wood thickness and tree species and vapour pressure and heating platen
Temperature, can be in a few minutes to dozens of minutes, for example, the maple of the poplar of 4mm and 3.5mm thickness is at 200 degrees Celsius of heating platen
With 5 minutes or so are needed under the vapour pressure of 550KPa.This process referred to herein as pre-processes, and sees the pretreatment (T in Fig. 10~
T1).If over-topped/bamboo wood has been subjected to sofening treatment before being put into press, the time can be saved or be reduced to this process.
After S4, sofening treatment heating platen continue slowly closure (closing speed can according to over-topped/bamboo woods of different tree species into
Row adjustment, can also be closed, and pause, and the mode for being further continued for being closed, then pause ... carries out, it is therefore an objective to over-topped/bamboo wood be allowed to have one
The fixed time alleviates internal compression chord, can play the role of fixed compression, reduces the compression rebound in later period), it steams simultaneously
It carries out.Stop pressing plate closure when over-topped/bamboo wood thickness reduction is to required thickness.This process is compression process, is seen
Compression (T in Fig. 11~T2), the time depends on compression ratio, over-topped/bamboo wood thickness and tree species, can be in a few minutes to tens
Minute.For example, the poplar of 4mm is pressed onto the maple of 2mm and 3.5mm thickness under the vapour pressure of 200 degrees Celsius of heating platen and 550KPa
The time required for 2.4mm is pressed at 7 minutes or so.
1) pressing plate maintains in situ, to steam while carrying out after stopping closure, it is therefore an objective to alleviate and discharge in over-topped/bamboo wood
The stress in portion plays the role of fixed compression, prevents and reduce the rebound of compressed wood/bamboo wood.After this process is referred to herein as
Processing, is shown in the post-processing (T in Fig. 12~T3), the time can be in a few minutes to dozens of minutes.In 200 degrees Celsius of heating platen and
Under the vapour pressure of 550KPa, the poplar of 4mm is pressed onto 2mm and the maple of 3.5mm thickness is pressed onto 2.4mm, the time required for post-processing
At 10 minutes or so.
2) stop steaming, and open the air suction function of aperture on pressing plate, excessive moisture and timber/bamboo wood is discharged due to high temperature
The extract gas of generation.This process only needs 1-2 minutes, and then stop suction function, and the aperture venting channels on pressing plate are natural
It is unimpeded, it is that pressing plate inner and outer air pressure is consistent, opens pressing plate, takes out over-topped/bamboo wood, over-topped/bamboo wood moisture content at this time is very
Low, the later period no longer needs to be dried.
Fig. 3 installs the corrosion-resistant Vented metal plate 2 of high-temperature-resistant high-pressure-resistant additional on upper lower hot pressing board 1, and Vented metal plate 2 passes through 4
Other are separately connected with upper lower hot pressing board 1 for the screw of a corner or welding etc., and Vented metal plate 2 is using sintering filter screen, slightly
Matte and the heating platen contact surface with spray orifice, smooth face are over-topped/bamboo wood contact surface.Steam can readily pass through this
Plate, if installed additional by screw, the height of screw has to the height lower than Vented metal plate.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, it can also make several improvements and retouch, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (2)
1. hot binding steam spraying method compacted wood/bamboo wood method, which comprises the steps of:
S1, high pressure resistant high temperature resistant Vented metal plate, Vented metal plate are installed additional on the upper lower platen of the hot press of carrying vapour spray orifice
It is smooth face outwardly, contacted with over-topped/bamboo wood, and upper lower platen is warming up to 160-220- DEG C, and in the next steps one
The straight temperature for keeping upper lower platen；
S2, by moisture content 8% to 30% timber/bamboo wood or pass through timber/bamboo wood of high temperature saturated vapor pre-softening
It is placed on the resulting press lower platen of step S1；
Lower platen on S3, quick-make stops closing when top board touches over-topped/bamboo wood and acts on and has certain pressure
It closes, and opens high steam and over-topped/bamboo wood upper and lower surface is steamed；
S4, it is slowly closed above-mentioned upper lower platen, steams while carried out, when over-topped/bamboo wood thickness reduction to required thickness
Stop pressing plate closure when spending；
S5, pressing plate maintain in situ, to steam while carrying out after stopping closure；
S6, stop steaming, and open the air suction function of aperture on upper lower platen, excessive moisture and timber/bamboo wood is discharged because of high temperature
And the extract gas generated, then stop suction function, and the aperture venting channels on pressing plate are naturally unimpeded, so that inside and outside pressing plate
Air pressure is consistent, lower platen in unlatching, takes out over-topped/bamboo wood；
For timber/bamboo wood densification hot press with steam-injection hole in the step S1, and has the function of air-breathing exhaust；
The Vented metal plate uses sintering filter screen, and the face contacted with over-topped/bamboo wood is relatively flat smooth and can have
Effect penetrates steam.
2. densification obtained by the method for hot binding steam spraying method compacted wood/bamboo wood as described in claim 1
Timber/bamboo wood.
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| CN201710108674.7A CN106881755B (en) | 2017-02-27 | 2017-02-27 | Hot binding steam spraying method compacted wood/bamboo wood method and compacted wood/bamboo wood |
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| CN201710108674.7A CN106881755B (en) | 2017-02-27 | 2017-02-27 | Hot binding steam spraying method compacted wood/bamboo wood method and compacted wood/bamboo wood |
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| CN106881755B true CN106881755B (en) | 2019-08-27 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109176811A (en) * | 2018-09-30 | 2019-01-11 | 河南省林业科学研究院 | A kind of processing method of superficial charring poplar solid wooden floor board |
| CN111823342A (en) * | 2019-04-19 | 2020-10-27 | 中山市大自然木业有限公司 | Method for compressing wood board blank, single-layer hot press for same and wood board blank prepared by same |
| CN111959088A (en) * | 2020-08-07 | 2020-11-20 | 湖州新意科技有限公司 | Pressing equipment for producing fireproof decorative material plates |
| CN112959447A (en) * | 2021-02-05 | 2021-06-15 | 浙江农林大学 | Production method of densified bamboo board |
| CN114407153B (en) * | 2022-02-17 | 2023-04-11 | 国际竹藤中心 | Processing method of bamboo flattening plate, bamboo flattening plate obtained by processing method and application of bamboo flattening plate |
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| CN102423889A (en) * | 2011-12-09 | 2012-04-25 | 南京林业大学 | Spray evaporation cooling hot press, and single-sided compressed wooden plate and production method thereof |
| CN104308949A (en) * | 2014-08-28 | 2015-01-28 | 苏雄孟 | Wood plate hot-press device |
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| JP2002240012A (en) * | 2001-02-21 | 2002-08-28 | Juken Sangyo Co Ltd | Method for manufacturing woody board and its woody board |
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|---|---|---|---|---|
| CN102423889A (en) * | 2011-12-09 | 2012-04-25 | 南京林业大学 | Spray evaporation cooling hot press, and single-sided compressed wooden plate and production method thereof |
| CN104308949A (en) * | 2014-08-28 | 2015-01-28 | 苏雄孟 | Wood plate hot-press device |
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