CN106313249A - Deep carbonation method for thick and heavy wood plate - Google Patents
Deep carbonation method for thick and heavy wood plate Download PDFInfo
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- CN106313249A CN106313249A CN201610839300.8A CN201610839300A CN106313249A CN 106313249 A CN106313249 A CN 106313249A CN 201610839300 A CN201610839300 A CN 201610839300A CN 106313249 A CN106313249 A CN 106313249A
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- plank
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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
- B27M1/06—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by burning or charring, e.g. cutting with hot wire
-
- 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
- B27K5/003—Treating of wood not provided for in groups B27K1/00, B27K3/00 by using electromagnetic radiation or mechanical waves
- B27K5/006—Vibrations
-
- 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
- B27M1/08—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by multi-step processes
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses a deep carbonation method for a thick and heavy wood plate and belongs to the technical field of wood processing. The method specifically comprises steps as follows: (1) cutting of the wood plate; (2) pre-drying treatment of the wood plate; (3) deep drying treatment; (4) carbonation treatment; (5) tempering treatment. All the steps of the method are reasonably matched, the cracking resistance and the bending resistance of the wood plate can be well improved, can be 8% and 5% lower than those of a conventional wood plate respectively and are about 40% and 20% lower than those of the wood plate treated with a traditional method, the method has the remarkable improving effect, meanwhile, the whole treatment duration of the technology is shortened by 30%-40%, the efficiency is higher, and the method has the high popularization value.
Description
Technical field
The invention belongs to wood processing technique field, be specifically related to the degree of depth carbonization method of a kind of thick and heavy wooden boards.
Background technology
The timber that carbide wood obtains after referring to, in hot environment, timber is carried out homogeneity carbonization treatment, after carbonization treatment
Timber in addition to surface aesthetic, also there is anticorrosion and antibiont invasion and attack, resistant to elevated temperatures advantage, and owing to it has moisture content
Low, the most hygroscopic, stable material quality, defat indeformable, complete do not overflow fat, heat-proof quality good, without features such as special odors, be preferable
Furniture and indoor and outdoor decoration material.
The carbonization of timber can be divided into again surface carbonation and degree of depth carbonization, as the term suggests, the degree of depth that surface carbonation processes is shallower,
It is generally used for compared with light sheet or the treating of wood relatively low to performance requirement, and the degree of depth of degree of depth carbonization treatment is relatively deep, is generally used for
The treating of wood of thicker plate material or higher to performance requirement, this two ways without quality point, the simply difference of processing technique demand
Different.Although carbide wood has above-mentioned more advantage, but after usual carbonization, the cracking resistance of timber, bending resistance all can decline, for
For thicker plate material, most for the support of main body, load-bearing, its bending resistance obviously performance to product has important meaning
Justice, and its cracking resistance also can affect its use value, and people affect for sheet material for thicker plate material degree of depth carbonization at present
Research less, the freshest rare to the process technique improving emphatically, promoting its cracking resistance and bending resistance.
Summary of the invention
It is desirable to provide the degree of depth carbonization method of a kind of thick and heavy wooden boards.
The present invention is achieved through the following technical solutions:
The degree of depth carbonization method of a kind of thick and heavy wooden boards, comprises the steps:
(1) plank cuts:
Plank to be processed is cut by the requirement of fabrication design, standby then rinse the impurity such as wood flour with clear water after；
(2) the pre-dry-cure of plank:
Dry kiln put into by plank after step (1) being processed, is dried after 18 ~ 20% standby by its water content；
(3) depth drying processes:
1) plank after processing step (2) proceeds dried, and now keeping the temperature in dry kiln is 105 ~ 115
DEG C, simultaneously by the boost in pressure in dry kiln to 1 ~ 1.5MPa, and the ultrasound wave that plank applying frequency is 53 ~ 55 KHz is carried out
Process, until the water content of plank is dried to 12 ~ 14%；It is the most important thing in plank carbonization dry run that depth drying processes,
Also being cracking incidence rate, the internal sabotage more stage, during water content 12 ~ 20%, the dehydration of plank cross section is very fast, its
Longitudinal stress is relatively big, and controlling temperature is 105 ~ 115 DEG C, and ultrasonic frequency is 53 ~ 55 KHz, controls the edge, direction of ultrasound wave simultaneously
The longitudinal direction of timber, can well reduce longitudinally excessive because being dried generation stress problem, and holding pressure is 1 ~ 1.5MPa, is conducive to
When improving internal moisture evaporation, effect is broken up for plank internal structure, maintain original mechanical characteristic；
2) to operation 1) process after plank proceed dried, the temperature now promoted in dry kiln is 130 ~ 135 DEG C,
Adherence pressure is to 1.8 ~ 2.2MPa, and lifting ultrasonic frequency is to 59 ~ 61KHz, until the water content of plank is dried to 7 ~ 8%；At water
During content 7 ~ 12%, the tangential stress of plank is relatively big, and now controlling temperature is 130 ~ 135 DEG C, and ultrasonic frequency is 59 ~ 61KHz,
Control tangential along timber of the direction of ultrasound wave simultaneously, can well reduce tangential producing the problem that stress is excessive because being dried, protect
Holding pressure is 1.8 ~ 2.2MPa, maintains original mechanical characteristic further；
3) to operation 2) process after plank proceed dried, the temperature now promoted in dry kiln is 150 ~ 155 DEG C,
Adherence pressure is to 2.5 ~ 2.8MPa, and lifting ultrasonic frequency is to 65 ~ 67KHz, until the water content of plank is dried to 3 ~ 4%；At water
During content 3 ~ 7%, plank radial stress is relatively big, and now controlling temperature is 150 ~ 155 DEG C, and ultrasonic frequency is 65 ~ 67KHz, with
Time control the direction of ultrasound wave along the radial direction of timber, can well reduce radially because being dried the problem that stress is excessive that produces, holding
Pressure is 2.5 ~ 2.8MPa, further maintains original mechanical characteristic；Under the mating reaction of aforesaid operations, this stage
Season cracking rate comparability decline about 50%, the bending resistance of plank is improved very well, can well shorten again dry
Duration；
(4) carbonization treatment:
Carbonizing chamber put into by plank after being processed by step (3) depth drying, and the temperature keeping indoor is 205 ~ 215 DEG C, simultaneously
Plank applies the ultrasound wave that frequency is 38 ~ 40KHz process, after being persistently jointly processed by 2.5 ~ 3.5h, obtain carbonization plank standby
With；When carbonization treatment, its internal moisture is dried completely, and inside is tangential, radial stress is less, and its surface wood fibre is at high temperature
Under the conditions of carbonization, surface and longitudinally produce stress, now apply ultrasound wave and be beneficial to improve this stress, simultaneously can also homogenizing plank table
The uniformity of surface temperature, and then improve carbonization treatment effect, shorten handling duration, and be conducive to improving stablizing within plank
Property；
(5) modifier treatment:
After step (4) carbonization treatment, first the temperature of plank being down to 160 ~ 165 DEG C, the water content then regulating plank is 1.8
~ 2.3%, then the temperature of plank is down to 110 ~ 120 DEG C, and the water content regulating plank is 4 ~ 5%, finally the temperature of plank is dropped
To 55 ~ 60 DEG C, regulate after the water content of plank is 6.5 ~ 7.5% simultaneously, carbonization plank is taken out, is put under normal temperature and pressure conditions
Natural cooling, finally carries out grinding process to board surface.Plank is carried out the modifier treatment of temperature, moisture, one can be entered
After step lifting carbonization, the stability of plank, enhances its durable, cracking resistance and bending resistance.
Further, the thickness of the plank to be processed described in step (1) is not less than 18mm.
Further, the temperature in the dry kiln described in step (2) controls is 70 ~ 80 DEG C.
Further, operation 1 in step (3)) described in ultrasonic Treatment time sound wave direction being longitudinally applied to along plank,
Operation 2) described in ultrasonic Treatment time sound wave direction along the tangential applying of plank, operate 3) described in ultrasonic Treatment time sound
The direction of ripple applies along the radial direction of plank.
Further, direction being longitudinally applied to along plank of sound wave during ultrasonic Treatment described in step (4).
Further, the cooling described in step (5) and conditioning are by being passed through the realization of low-temperature atomizing water.
Further, the temperature of described low-temperature atomizing water is 2 ~ 4 DEG C.
There is advantages that
The present invention is dried at plank, carbonization treatment time, strictly control temperature conditions, decrease the temperature bad shadow to sheet material
Ring, the different condition ultrasonic Treatment simultaneously carried out, the processing mode of collocation high pressure, string in each stage timber can be improved very well
Different to, stress radially and longitudinally, and the phenomenon that cracking may be caused to occur, reduce to greatest extent and wood internal is tied
The destruction of structure, maintains the bending resistance of original timber, moreover it is possible to make being more uniformly distributed of board surface carbonization treatment, whole carbon
The efficiency that change processes is promoted the most very well.Final under the mating reaction of each step, carbonization treatment technique of the present invention can be very well
Improve the cracking resistance of plank, bending resistance, more conventional plank declines within 8%, 5% respectively, and after relatively conventional process
Its cracking resistance, bending resistance reduce 40%, about 20% respectively and are significantly improved effect, simultaneously the whole place of present invention process
Reason duration shortens 30 ~ 40%, in hgher efficiency, has good promotional value.
Detailed description of the invention
Embodiment 1
The degree of depth carbonization method of a kind of thick and heavy wooden boards, comprises the steps:
(1) plank cuts:
Plank to be processed is cut by the requirement of fabrication design, standby then rinse the impurity such as wood flour with clear water after；
(2) the pre-dry-cure of plank:
Dry kiln put into by plank after step (1) being processed, is dried after 18 ~ 20% standby by its water content；
(3) depth drying processes:
1) plank after processing step (2) proceeds dried, and now keeping the temperature in dry kiln is 105 DEG C, with
Time by the boost in pressure in dry kiln to 1MPa, and plank applied the ultrasound wave that frequency is 53KHz process, until plank
Water content be dried to 12 ~ 13%；
2) to operation 1) process after plank proceed dried, the temperature now promoted in dry kiln is 130 DEG C, promotes
Pressure is to 1.8MPa, and lifting ultrasonic frequency is to 59KHz, until the water content of plank is dried to 7 ~ 8%；
3) to operation 2) process after plank proceed dried, the temperature now promoted in dry kiln is 150 DEG C, promotes
Pressure is to 2.5MPa, and lifting ultrasonic frequency is to 65KHz, until the water content of plank is dried to 3 ~ 4%；
(4) carbonization treatment:
Carbonizing chamber put into by plank after being processed by step (3) depth drying, and the temperature keeping indoor is 205 DEG C, simultaneously to wood
Plate applies the ultrasound wave that frequency is 38KHz and processes, and after being persistently jointly processed by 2.5h, obtains carbonization plank standby；
(5) modifier treatment:
After step (4) carbonization treatment, first the temperature of plank is down to 160 DEG C, then regulate the water content of plank be 1.8 ~
2.0%, then the temperature of plank is down to 110 DEG C, and the water content regulating plank is 4 ~ 4.5%, finally the temperature of plank is down to
55 DEG C, regulate after the water content of plank is 6.5 ~ 7% simultaneously, carbonization plank is taken out, is put under normal temperature and pressure conditions the coldest
But, finally board surface is carried out grinding process.
Further, the thickness of the plank to be processed described in step (1) is not less than 18mm.
Further, the temperature in the dry kiln described in step (2) controls is 70 DEG C.
Further, operation 1 in step (3)) described in ultrasonic Treatment time sound wave direction being longitudinally applied to along plank,
Operation 2) described in ultrasonic Treatment time sound wave direction along the tangential applying of plank, operate 3) described in ultrasonic Treatment time sound
The direction of ripple applies along the radial direction of plank.
Further, direction being longitudinally applied to along plank of sound wave during ultrasonic Treatment described in step (4).
Further, the cooling described in step (5) and conditioning are by being passed through the realization of low-temperature atomizing water.
Further, the temperature of described low-temperature atomizing water is 2 DEG C.
Embodiment 2
The degree of depth carbonization method of a kind of thick and heavy wooden boards, comprises the steps:
(1) plank cuts:
Plank to be processed is cut by the requirement of fabrication design, standby then rinse the impurity such as wood flour with clear water after；
(2) the pre-dry-cure of plank:
Dry kiln put into by plank after step (1) being processed, is dried after 18 ~ 20% standby by its water content；
(3) depth drying processes:
1) plank after processing step (2) proceeds dried, and now keeping the temperature in dry kiln is 115 DEG C, with
Time by the boost in pressure in dry kiln to 1.5MPa, and plank applied the ultrasound wave that frequency is 55 KHz process, until
The water content of plank is dried to 13 ~ 14%；
2) to operation 1) process after plank proceed dried, the temperature now promoted in dry kiln is 135 DEG C, promotes
Pressure is to 2.2MPa, and lifting ultrasonic frequency is to 61KHz, until the water content of plank is dried to 7 ~ 8%；
3) to operation 2) process after plank proceed dried, the temperature now promoted in dry kiln is 155 DEG C, promotes
Pressure is to 2.8MPa, and lifting ultrasonic frequency is to 67KHz, until the water content of plank is dried to 3 ~ 4%；
(4) carbonization treatment:
Carbonizing chamber put into by plank after being processed by step (3) depth drying, and the temperature keeping indoor is 215 DEG C, simultaneously to wood
Plate applies the ultrasound wave that frequency is 40KHz and processes, and after being persistently jointly processed by 3.5h, obtains carbonization plank standby；
(5) modifier treatment:
After step (4) carbonization treatment, first the temperature of plank being down to 165 DEG C, the water content then regulating plank is 2 ~ 2.3%,
Again the temperature of plank is down to 120 DEG C, and the water content regulating plank is 4.5 ~ 5%, finally the temperature of plank is down to 60 DEG C,
Regulate after the water content of plank is 7 ~ 7.5% simultaneously, carbonization plank is taken out, is put in natural cooling under normal temperature and pressure conditions, finally
Board surface is carried out grinding process.
Further, the thickness of the plank to be processed described in step (1) is not less than 18mm.
Further, the temperature in the dry kiln described in step (2) controls is 80 DEG C.
Further, operation 1 in step (3)) described in ultrasonic Treatment time sound wave direction being longitudinally applied to along plank,
Operation 2) described in ultrasonic Treatment time sound wave direction along the tangential applying of plank, operate 3) described in ultrasonic Treatment time sound
The direction of ripple applies along the radial direction of plank.
Further, direction being longitudinally applied to along plank of sound wave during ultrasonic Treatment described in step (4).
Further, the cooling described in step (5) and conditioning are by being passed through the realization of low-temperature atomizing water.
Further, the temperature of described low-temperature atomizing water is 4 DEG C.
Comparative example 1
This comparative example 1 compared with Example 1, step (3) depth drying process whole during, do not carry out at supercharging
Reason operation, method step in addition is the most identical.
Comparative example 2
Compared with Example 2, it is each rank in the process of step (3) depth drying, step (4) carbonization treatment for this comparative example 2
Section apply ultrasound wave direction all differ, specially embodiment 2 correspondence tangential, radially and longitudinally in two other in
Any one, method step in addition is the most identical.
Matched group
Existing timber deep carbonization treatment technique.
In order to contrast effect of the present invention, select with the elm sheet material that a batch of thickness is 25mm, cut into specification the same
After, it being divided into five groups at random, correspondence processes by above-mentioned five kinds of modes respectively, and following table is corresponding correction data:
As can be seen from the above table, the present invention processes technique can well keep the cracking resistance of plank, bending resistance, can also carry simultaneously
High finished product rate, shortens and makes duration, have good promotional value.
Claims (7)
1. the degree of depth carbonization method of a thick and heavy wooden boards, it is characterised in that comprise the steps:
(1) plank cuts:
Plank to be processed is cut by the requirement of fabrication design, standby then rinse the impurity such as wood flour with clear water after；
(2) the pre-dry-cure of plank:
Dry kiln put into by plank after step (1) being processed, is dried after 18 ~ 20% standby by its water content；
(3) depth drying processes:
1) plank after processing step (2) proceeds dried, and now keeping the temperature in dry kiln is 105 ~ 115
DEG C, simultaneously by the boost in pressure in dry kiln to 1 ~ 1.5MPa, and the ultrasound wave that plank applying frequency is 53 ~ 55 KHz is carried out
Process, until the water content of plank is dried to 12 ~ 14%；
2) to operation 1) process after plank proceed dried, the temperature now promoted in dry kiln is 130 ~ 135 DEG C,
Adherence pressure is to 1.8 ~ 2.2MPa, and lifting ultrasonic frequency is to 59 ~ 61KHz, until the water content of plank is dried to 7 ~ 8%；
3) to operation 2) process after plank proceed dried, the temperature now promoted in dry kiln is 150 ~ 155 DEG C,
Adherence pressure is to 2.5 ~ 2.8MPa, and lifting ultrasonic frequency is to 65 ~ 67KHz, until the water content of plank is dried to 3 ~ 4%；
(4) carbonization treatment:
Carbonizing chamber put into by plank after being processed by step (3) depth drying, and the temperature keeping indoor is 205 ~ 215 DEG C, simultaneously
Plank applies the ultrasound wave that frequency is 38 ~ 40KHz process, after being persistently jointly processed by 2.5 ~ 3.5h, obtain carbonization plank standby
With；
(5) modifier treatment:
After step (4) carbonization treatment, first the temperature of plank being down to 160 ~ 165 DEG C, the water content then regulating plank is 1.8
~ 2.3%, then the temperature of plank is down to 110 ~ 120 DEG C, and the water content regulating plank is 4 ~ 5%, finally the temperature of plank is dropped
To 55 ~ 60 DEG C, regulate after the water content of plank is 6.5 ~ 7.5% simultaneously, carbonization plank is taken out, is put under normal temperature and pressure conditions
Natural cooling, finally carries out grinding process to board surface.
The degree of depth carbonization method of a kind of thick and heavy wooden boards the most according to claim 1, it is characterised in that in step (1)
The thickness of described plank to be processed is not less than 18mm.
The degree of depth carbonization method of a kind of thick and heavy wooden boards the most according to claim 1, it is characterised in that in step (2)
It is 70 ~ 80 DEG C that temperature in described dry kiln controls.
The degree of depth carbonization method of a kind of thick and heavy wooden boards the most according to claim 1, it is characterised in that in step (3)
Operation 1) described in ultrasonic Treatment time sound wave direction being longitudinally applied to along plank, operate 2) described in ultrasonic Treatment time sound
The direction of ripple along the tangential applying of plank, operates 3) described in ultrasonic Treatment time sound wave direction apply along the radial direction of plank.
The degree of depth carbonization method of a kind of thick and heavy wooden boards the most according to claim 1, it is characterised in that in step (4)
Direction being longitudinally applied to along plank of sound wave during described ultrasonic Treatment.
The degree of depth carbonization method of a kind of thick and heavy wooden boards the most according to claim 1, it is characterised in that in step (5)
Described cooling and conditioning are by being passed through the realization of low-temperature atomizing water.
The degree of depth carbonization method of a kind of thick and heavy wooden boards the most according to claim 6, it is characterised in that described low temperature mist
The temperature changing water is 2 ~ 4 DEG C.
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| CN201610839300.8A CN106313249A (en) | 2016-09-22 | 2016-09-22 | Deep carbonation method for thick and heavy wood plate |
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| CN201610839300.8A CN106313249A (en) | 2016-09-22 | 2016-09-22 | Deep carbonation method for thick and heavy wood plate |
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| CN107297800A (en) * | 2017-05-17 | 2017-10-27 | 安徽三和工艺品有限公司 | A kind of method of the working process of pinus sylvestris var. mongolica timber |
| CN108908632A (en) * | 2018-07-23 | 2018-11-30 | 桃江县宏森木业有限责任公司 | A kind of processing technology of paint free plate |
| CN110978190A (en) * | 2019-11-14 | 2020-04-10 | 大亚木业(江西)有限公司 | Preparation process of carbonized fiber board and application of carbonized fiber board to carbonized composite floor base material |
| CN112358335A (en) * | 2020-11-10 | 2021-02-12 | 贵州欧瑞欣合环保股份有限公司 | Method for carbonizing surface of sludge compost wood conditioner |
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| CN108908632A (en) * | 2018-07-23 | 2018-11-30 | 桃江县宏森木业有限责任公司 | A kind of processing technology of paint free plate |
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