CN106217566A - A kind of timber top layer progressive production method thickened of compression layer - Google Patents
A kind of timber top layer progressive production method thickened of compression layer Download PDFInfo
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- CN106217566A CN106217566A CN201610685217.XA CN201610685217A CN106217566A CN 106217566 A CN106217566 A CN 106217566A CN 201610685217 A CN201610685217 A CN 201610685217A CN 106217566 A CN106217566 A CN 106217566A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
- B27M1/02—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by compressing
-
- 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
- B27K5/0085—Thermal treatments, i.e. involving chemical modification of wood at temperatures well over 100°C
-
- 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
- B27K5/0085—Thermal treatments, i.e. involving chemical modification of wood at temperatures well over 100°C
- B27K5/009—Thermal treatments, i.e. involving chemical modification of wood at temperatures well over 100°C using a well-defined temperature schedule
-
- 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
- B27K5/04—Combined bleaching or impregnating and drying of wood
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses a kind of timber top layer progressive production method thickened of compression layer, the method specifically include dry, block, soak, preheat, hot pressing, heat treatment and finished product.The present invention not only expands the controlled range of thickness of compressed layer, and also improves the precision of compression process, improves yield rate；The present invention also has superior top layer density, hardness, bending strength and elastic modelling quantity simultaneously.
Description
Technical field
The present invention relates to a kind of timber top layer progressive production method thickened of compression layer, relate to timber floor and field of furniture.
Background technology
Along with stopping the trade barrier that wildwood business is felled and international market is tightened up comprehensively, the timber money of high-quality
Source is more and more in short supply, poplar (Populus), Lignum seu Ramulus Cunninghamiae Lanceolatae (Cunninghamia lanceolata), Pinus massoniana Lamb (Pinus
Etc. massoniana) quick-growing plantation is increasingly becoming the industrial cut stock seeds that China is main.Since China's " natural forest protection work
Journey " with " rapid-growing and high-yield forest base construction project " implement since, quick-growing plantation preservation area reaches 69,330,000 hm2, account for China
The 36% of Forest Land Area；Artificial forest accumulation 24.83 hundred million m3, account for 17% (State Administration of Forestry, 2013) of the total accumulation of forest.But
Be, artificial forest fast-growing softwood growth cycle is short, density is little, intensity hardness is low, not many defects such as corrosion resistant constrain them
Application and use value, be only used for the aspects such as packing crates, splint, wood-based plate, pulpwood and the wood fiber raw material of industry.
If being applied to sports equipment, furniture, interior/exterior decoration material and building structure field by modification, will improve
The added value of product of fast-growing softwood, promotes its application level, widens its range of application.
Wood compression technology is that timber carries out compression after sofening treatment, and compression is permanently fixed
A kind of modification treatment technology.Timber after compression, its anatomic construction, physical property and mechanical property all there occurs very before relatively compressing
Big change: density, hardness and wearability significantly improve, intensity and modulus increase, and performance significantly improves.At present, with Cortex Cryptomeriae Fortunei Radicis
(Cryptomeria fortunei), Cupressus funebris (Platycladus orientalis), poplar compression wood are that base material makes
The woodworks such as floor, furniture, Indoor decorative plate, artware have begun to be applied in life, production, although reduced overall can have
Effect improves the physical and mechanical property of artificial forest softwood, but volume of timber loss is excessive causes timber utilization rate and economic benefit low
It is not widely popularized and industrialized production.And timber top layer compress technique is possible not only to reduce compression wood Volume Loss
Amount, has started new approach for efficiently utilizing of low-density timber, and the most whole process only Yi Shui, heat, pressure are as control strip
Part, the improvement of environmentally friendly type biomass functional material and the exploitation of new material are the most significant.Currently, with respect to timber
The production technology of Surface compression is less, and Publication No. CN101007415 discloses the production technology on a kind of surface peening floor.
Publication No. CN 101603623A discloses a kind of surface reinforced solid wood section material, floor and manufacture method thereof, and its density is permissible
Reach 300-580kg/m3, strengthening surface thickness is 1-5mm, and the hardness of paint film of strengthening surface is 2H-5H, section bar overall moisture content
For 6%-9%.But existing timber top layer compress technique is primarily present, and thickness of compressed layer is little, compression layer density is low, compression
The controllability scope of layer thickness is little, the problem that defect rate is high.
Summary of the invention
The technical problem to be solved is to provide a kind of timber top layer progressive production method thickened of compression layer.
The present invention not only expands the controlled range of compression layer density and thickness, improves the precision of compression process, improves yield rate,
And the present invention also has superior hardness, bending strength and elastic modelling quantity.
For solving above-mentioned technical problem, technical scheme is as follows: a kind of timber top layer compression layer is progressive to be thickened
Production method, the method includes following concrete operation:
A, it is dried: sheet material is dried to moisture content less than 14%；
B, end-blocking: sheet material is carried out termination process；
C, immersion: sheet material is carried out immersion process, soaking time is determined according to compressed thickness and immersion coefficient；
D, preheating: sheet material is sent into hot press hot pressing, carry out the pre-heat treatment of 160s (second), and preheating temperature is 100-200
DEG C (degree Celsius)；
E, hot pressing: sheet material carries out continuous hot-press or the batch (-type) hot pressing of interval 3-25s, and moulding pressure is 2-20MPa,
Compression speed is 0.1-8mm/s, and hot pressing temperature is 100-200 DEG C, until sheet material is compressed to appointed thickness, keeps 2min (minute)
Below less than 70 DEG C are cooled to after；
F, heat treatment: after compression is disposed, the sheet material after compression is sent into heat treatment kiln under clamping plate clamp and is carried out at heat
Reason；
G, finished product: after heat treatment, cooling, damping, kiln discharge, obtain finished product.
In the above-mentioned progressive production method thickened of timber top layer compression layer, in step a, sheet material is dried to moisture content low
In 12%.
In the progressive production method thickened of compression layer of aforesaid timber top layer, in step b, paraffin is used to carry out at end-blocking
Reason, described melting point of paraffin wax temperature is more than 47 DEG C.
In the progressive production method thickened of compression layer of aforesaid timber top layer, in step d, the temperature of the pre-heat treatment is 120
℃；In step e, hot pressing temperature is 180 DEG C.
In the progressive production method thickened of compression layer of aforesaid timber top layer, in step f, described heat treatment is by temperature
The highest it is warming up to 180-230 DEG C, keeps 2-5 hour.
In the progressive production method thickened of compression layer of aforesaid timber top layer, described heat treatment is by the highest for temperature intensification
To 200 DEG C, keep 2 hours.
In the progressive production method thickened of compression layer of aforesaid timber top layer, in step f, described heat treatment is in temperature
Carrying out steam pressure after being increased to 150 DEG C, the pressure of steam pressure is more than 1MPa, keeps more than 1h.
In the progressive production method thickened of compression layer of aforesaid timber top layer, in step f, described heat treatment is additionally included in
To heat treatment kiln evacuation before processing, carry out Technology for Heating Processing under vacuum conditions.
In the progressive production method thickened of compression layer of aforesaid timber top layer, in step f, specifically, described heat treatment
Including following operation:
(1) in the 10th～20min, it is uniformly heating to 90-110 DEG C；
(2) at 10-20min～75-85min, it is uniformly heating to 120-130 DEG C from 90-110 DEG C；
(3) at 75-80min～88-92min, it is uniformly heating to 150-160 DEG C from 120-130 DEG C；
(4) at 88-92min～105-110min, it is uniformly heating to 190-205 DEG C from 150-160 DEG C；
(5) at 105-110min～220-230min, temperature is at 190-210 DEG C；
(6) at 220-230min～265-272min, from 190-205 DEG C of uniform decrease in temperature to 150-160 DEG C；
(7) at 265-272min～335-345min, from 150-160 DEG C of uniform decrease in temperature to 70-80 DEG C.
In the progressive production method thickened of compression layer of aforesaid timber top layer, described heat treatment also includes:
(1) in the 10th～20min, oxygen content is uniformly reduced to 13-16% from 20-25%；
(2) at 10-20min～75-85min, oxygen content is uniformly reduced to 9-11% from 13-16%；
(3) at 75-80min～88-92min, oxygen content is reduced to 2-3% from 9-11%；
(4) at 88-92min～105-110min, oxygen content maintains 2-3%；
(5) at 105-110min～220-230min, oxygen content maintains 2-3%；
(6) at 220-230min～265-272min, oxygen content maintains 2-3%；
(7) at 265-272min～335-345min, oxygen content uniformly rises to 14-16%.
Beneficial effects of the present invention: compared with prior art, the method have the advantages that
(1) use interval pressuring method hot pressing progressive to top layer compression, substantially increase compression effectiveness, improve compression and add
The precision of work, and it also avoid the substandard products quantity caused because of technological problems, improve yield rate.
(2) present invention also carries out immersion process to sheet material before hot pressing is compressed, and is controlled by soaking time and hot pressing pressure,
Accurately the thickness of control table layer compression layer, expands the controllability scope of thickness of compressed layer.
(3) present invention can also greatly improve the mechanical property of timber simultaneously, tests according to applicant, and the present invention produces and obtains
Compression top layer maximal density can reach 1.0g/cm3Above, case hardness arrives according to thickness of compressed layer difference raising 10%
Between 150%, compression top layer bending strength improve 80% to 100%, elastic modelling quantity improve 56% to 70%, before compression and
After compression, density and the relation away from centre distance are as shown in Figures 1 and 2.
(4) further, the Technology for Heating Processing on compression top layer is also further defined by applicant, and applicant is through anti-
Retrial is tested, screens, compares, is summed up the Technology for Heating Processing having drawn new basal temperature and oxygen content, the pressure after Overheating Treatment
Contracting top layer further increasing mechanical property, and it is as follows that applicant detects data:
| Sequence number | Project | Technical specification |
| 1 | Compression layer density g/cm3 | 0.8-1.0 |
| 2 | Comprcssive strength MPa | 75-160 |
| 3 | Elastic modulus G Pa | 12-25 |
| 4 | Hardness N/mm2 | 20-40 |
Accompanying drawing explanation
Fig. 1 be the present invention compression before Density Detection figure；
Fig. 2 be the present invention compression after Density Detection figure；
Fig. 3 is the process chart of the present invention；
Fig. 4 is the decrement immersion coefficient figure with soaking time of poplar；
Fig. 5 is the heat treatment cycle curve figure of the present invention.
Detailed description of the invention
Embodiment 1: a kind of timber top layer progressive production method thickened of compression layer, as shown in Figure 3, specifically includes following
Step:
A, sheet material is dried to moisture content less than 12%；
B, by melting temperature in the range of 47 DEG C-64 DEG C hard paraffin heating, then timber is carried out termination process, relatively
The paraffin hydrophobic layer that closure is good it is more likely formed under high-temperature；
C, sheet material being carried out immersion process, soaking time is determined according to compressed thickness and immersion coefficient, such as, and density
For 0.40g/cm3Poplar, under the conditions of 180 DEG C during compression, the immersion coefficient of decrement and soaking time is shown in Fig. 4, to pressure
When shortening the top layer of 12.5mm into, soaking time is 4h；
Timber after d, immersion process is carried out clamping process by the steel plate of surfacing, sends into the Multi-layer thermal of 180 DEG C afterwards
Between the pressing plate of press；And after timber enters multi-daylight press, carrying out the pre-heat treatment of 160s, preheating temperature is 120 DEG C；
E, sheet material is carried out continuous hot-press or interval 20s batch (-type) hot pressing, moulding pressure is 15MPa, compression speed
For 4mm/s, hot pressing temperature is 180 DEG C, until sheet material is compressed to appointed thickness, cools to less than 70 DEG C after keeping more than 2min；
After f, wood compression are disposed, the sheet material that the sheet material having metallic plate or high intensity clamps is sent through continuous conveyor
Enter in high-temperature heat treatment kiln, carry out heat treatment；
After g, heat treatment, cooling, damping, kiln discharge.
Embodiment 2: as shown in Figure 5, the Technology for Heating Processing on above-mentioned compression top layer:
(1) in the 10th～20min, it is uniformly heating to 90-110 DEG C from room temperature, and oxygen content uniformly reduces from 20-25%
To 13-16%；
(2) at 10-20min～75-85min, being uniformly heating to 120-130 DEG C from 90-110 DEG C, oxygen content is from 13-
16% is uniformly reduced to 9-11%；
(3) at 75-80min～88-92min, being uniformly heating to 150-160 DEG C from 120-130 DEG C, oxygen content is from 9-
11% is reduced to 2-3%；
(4) at 88-92min～105-110min, being uniformly heating to 190-205 DEG C from 150-160 DEG C, oxygen content maintains
At 2-3%, oxygen content maintains 2-3%；
(5) at 105-110min～220-230min, temperature is at 190-205 DEG C, and oxygen content maintains 2-3%；
(6) at 220-230min～265-272min, from 190-205 DEG C of uniform decrease in temperature to 150-160 DEG C, oxygen content is tieed up
Hold at 2-3%；
(7) at 265-272min～335-345min, from 150-160 DEG C of uniform decrease in temperature to 70-80 DEG C, oxygen content is uniform
Rise to 14-16%.
Claims (10)
1. the progressive production method thickened of timber top layer compression layer, it is characterised in that: the method includes following concrete operation:
A, it is dried: sheet material is dried to moisture content less than 14%；
B, end-blocking: sheet material is carried out termination process；
C, immersion: sheet material is carried out immersion process, soaking time is determined according to compressed thickness and immersion coefficient；
D, preheating: sheet material is sent into hot press hot pressing, carry out the pre-heat treatment of 160s, and preheating temperature is 100-200 DEG C；
E, hot pressing: sheet material carries out continuous hot-press or the batch (-type) hot pressing of interval 3-25s, and moulding pressure is 2-20MPa, compression
Speed is 0.1-8mm/s, and hot pressing temperature is 100-200 DEG C, until sheet material is compressed to appointed thickness, keeps cooling after more than 2min
To less than 70 DEG C；
F, heat treatment: after compression is disposed, the sheet material after compression is sent into heat treatment kiln under clamping plate clamp and is carried out heat treatment；
G, finished product: after heat treatment, cooling, damping, kiln discharge, obtain finished product.
The timber top layer the most according to claim 1 progressive production method thickened of compression layer, it is characterised in that: in step a,
Sheet material is dried to moisture content less than 12%.
The timber top layer the most according to claim 1 progressive production method thickened of compression layer, it is characterised in that: in step b,
Using paraffin to carry out termination process, described melting point of paraffin wax temperature is more than 47 DEG C.
The timber top layer the most according to claim 1 progressive production method thickened of compression layer, it is characterised in that: in step d,
The temperature of the pre-heat treatment is 120 DEG C；In step e, hot pressing temperature is 180 DEG C.
The timber top layer the most according to claim 1 progressive production method thickened of compression layer, it is characterised in that: in step f,
Described heat treatment is to be warming up to 180-230 DEG C by the highest for temperature, keeps 2-5 hour.
The timber top layer the most according to claim 5 progressive production method thickened of compression layer, it is characterised in that: described heat
Process is to be warming up to 200 DEG C by the highest for temperature, keeps 2 hours.
The timber top layer the most according to claim 1 progressive production method thickened of compression layer, it is characterised in that: in step f,
Described heat treatment is to carry out steam pressure after temperature is increased to 150 DEG C, and the pressure of steam pressure is more than 1MPa, keeps 1h
Above.
The timber top layer the most according to claim 1 progressive production method thickened of compression layer, it is characterised in that: in step f,
It is front to heat treatment kiln evacuation that described heat treatment is additionally included in process, carries out Technology for Heating Processing under vacuum conditions.
The timber top layer the most according to claim 1 progressive production method thickened of compression layer, it is characterised in that: in step f,
Specifically, described heat treatment includes following operation:
(1) in the 10th～20min, it is uniformly heating to 90-110 DEG C；
(2) at 10-20min～75-85min, it is uniformly heating to 120-130 DEG C from 90-110 DEG C；
(3) at 75-80min～88-92min, it is uniformly heating to 150-160 DEG C from 120-130 DEG C；
(4) at 88-92min～105-110min, it is uniformly heating to 190-205 DEG C from 150-160 DEG C；
(5) at 105-110min～220-230min, temperature is at 190-210 DEG C；
(6) at 220-230min～265-272min, from 190-205 DEG C of uniform decrease in temperature to 150-160 DEG C；
(7) at 265-272min～335-345min, from 150-160 DEG C of uniform decrease in temperature to 70-80 DEG C.
The timber top layer the most according to claim 9 progressive production method thickened of compression layer, it is characterised in that: described
Heat treatment also includes:
(1) in the 10th～20min, oxygen content is uniformly reduced to 13-16% from 20-25%；
(2) at 10-20min～75-85min, oxygen content is uniformly reduced to 9-11% from 13-16%；
(3) at 75-80min～88-92min, oxygen content is reduced to 2-3% from 9-11%；
(4) at 88-92min～105-110min, oxygen content maintains 2-3%；
(5) at 105-110min～220-230min, oxygen content maintains 2-3%；
(6) at 220-230min～265-272min, oxygen content maintains 2-3%；
(7) at 265-272min～335-345min, oxygen content uniformly rises to 14-16%.
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Cited By (12)
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|---|---|---|---|---|
| CN107116627A (en) * | 2017-05-08 | 2017-09-01 | 中国林业科学研究院木材工业研究所 | The compression layer position control method of timber stratiform compression |
| CN107263657A (en) * | 2017-06-07 | 2017-10-20 | 中国林业科学研究院木材工业研究所 | The thickness of compressed layer control method of timber stratiform compression |
| CN107322724A (en) * | 2017-08-16 | 2017-11-07 | 王可 | The control method of density gradient under Wood Across Compression |
| CN107414981A (en) * | 2017-06-13 | 2017-12-01 | 中国林业科学研究院木材工业研究所 | The consecutive production method of stratiform compression wood |
| CN108340462A (en) * | 2018-03-23 | 2018-07-31 | 中国林业科学研究院木材工业研究所 | A kind of expansion method of timber and its expansion wood of preparation |
| CN108582377A (en) * | 2018-03-29 | 2018-09-28 | 华南农业大学 | A kind of compressed wood of the wood compression-original position with the integrated method of autoclaving and its preparation |
| CN108943241A (en) * | 2018-08-22 | 2018-12-07 | 湖州南浔苏氏楼梯有限公司 | A kind of processing technology of insect prevention plank |
| CN108943208A (en) * | 2018-08-07 | 2018-12-07 | 中国林业科学研究院木材工业研究所 | A kind of solid wood compression compact sheet production method that Density Distribution is controllable |
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| CN107116627B (en) * | 2017-05-08 | 2019-10-29 | 中国林业科学研究院木材工业研究所 | The compression layer position control method of timber stratiform compression |
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| CN107414981A (en) * | 2017-06-13 | 2017-12-01 | 中国林业科学研究院木材工业研究所 | The consecutive production method of stratiform compression wood |
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