CN105034092B - A kind of efficient production method for being cold-pressed Recombined bamboo - Google Patents
A kind of efficient production method for being cold-pressed Recombined bamboo Download PDFInfo
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- CN105034092B CN105034092B CN201510356689.6A CN201510356689A CN105034092B CN 105034092 B CN105034092 B CN 105034092B CN 201510356689 A CN201510356689 A CN 201510356689A CN 105034092 B CN105034092 B CN 105034092B
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Abstract
The present invention is a kind of efficient production method for being cold-pressed Recombined bamboo, is comprised the technical steps that：a）Thin bamboo strips used for weaving is using modified low-temperature solidified phenolic glue dipping；b）Charging and steam-injection preheating；c）Molding；d）Slab is in tunnel cave internal heating curing.Advantage：Cold pressing Recombined bamboo prepared by the present invention can shorten the heat time, greatly improve the hot pressing efficiency of recombining bamboo；And the density of reduction Recombined bamboo（Reduction by more than 10%）And internal stress, shorten（Or without）Internal stresses release time, pressure during cold pressing only needs the 3/4 of normal pressures, and the defect such as jump silk, cracking of finished product will improve.The quality of lifting cold pressing Recombined bamboo, is allowed to the need for more preferably meeting market.
Description
Technical field
The present invention relates to a kind of efficient production method for being cold-pressed Recombined bamboo, the wood-based plate in category timber industry is manufactured
Technical field.
Background technology
Recombined bamboo（Also known as bamboo recombined material, heavy bamboo）It is by formed by improvement, raising on the basis of bamboo laminated board
Structure and decoration use novel bamboo wood-based plate.The main production process of Recombined bamboo is to remove bamboo wood after bamboo green layer, then passes through plane
Tabasheer is cut, rolls plus is sewn into the special thin bamboo strips used for weaving or bamboo beam piece through gap, through impregnation, drying, cold moudling-heat cure
Or hot press is hot-forming, density is produced for 1.0g/cm3And the bamboo recombined material of the above.So-called cold moudling-thermal curing method is
Refer to by rolling after impregnation plus seam thin bamboo strips used for weaving normal temperature high voltage compression molding in steel die, then together with mould in high temperature kiln
（120 DEG C -135 DEG C of temperature）Solidification is formed, and the slab sectional dimension majority of shaping is 2550mm * 140mm*140mm, the method
The Recombined bamboo being made is often referred to simply as being cold-pressed Recombined bamboo.The method is needed in hyperthermia tunnel Kiln by more than 10 heat more than hour
Solidification, small investment fast with shaping speed, the advantages of yield is big, but hypertonia when there is cold pressing（More than 65MPa）, mould
Loss is big, and internal stress is big, and thermal curing time is long, and the stress release time is long after mould unloading（Stack within more than 15 days）, the moisture content of sheet material
Inequality, easily occurs jumping the defect such as silk and cracking, although market demand is very big, but the cold pressing Recombined bamboo of high-quality during use
Production do not find a kind of good mode of production also.Be this cold pressing the existing production technology of Recombined bamboo on the basis of, it is changed
Enter the mode of production, improve its production efficiency and quality.
Steam preheating different from common hot pressing heat-transfer mechanism, by steam or deep fat heating steel sheet, then common hot pressing be
Steel plate carries out heat transfer heating to slab again, and the slab bulk temperature rate of climb is slow, and the time that plate forming solidification needs is long, fits
Suitable slim wood-based plate is heating and curing.It is by inside the rapid spray penetration such as high temperature super heated steam to slab, to steam preheating
It is even, instantaneously heat whole slab, reach the short time solidification new technology.The moment sprayed in steam, high temperature super heated steam is
Each corner of slab can be transferred heat to steam by carving, and core layer temperature is reached more than 100 DEG C immediately, substantially not by slab thickness
Influence, is substantially shorter hot pressing time.Steam preheating method and be particularly suitable for the thick, compacting of special heavy plate.
The steam injection pressing cycle is only the 1/5~1/4 of conventional thermocompression, and hot pressing energy consumption is only 1/10 of conventional thermocompression or so.By
This is visible, and the efficiency of steam injection pressing heat transfer is very high.
In addition, the best curing temperature of conventional phenol glue is at 135 DEG C, the solidification temperature of modified low-temperature solidified phenolic is
105~110 DEG C, adhesive, solidification temperature of the cold pressing Recombined bamboo blank in tunnel cave are used as using this low-temperature solidified phenolic glue
Degree need not just be increased to 135 DEG C, can reduce the isothermal holding expense of tunnel cave, can also substantially reduce energy consumption.
Using the existing cold pressing Recombined bamboo production technology of both process modifications, it will improve the production effect of cold pressing Recombined bamboo
Rate and quality, such as in the case where meeting floor requirement, can reduce the density of sheet material（Reduction by more than 10%）, reduction restructuring
The internal stress of bamboo, shortens（Or without）Heat transfer time in internal stresses release time, tunnel cave is greatly shortened, only conventional making sheet
40-50%.Pressure during cold pressing only needs the 3/4 of conventional making sheet pressure, and the defect such as jump silk, cracking of finished product will be substantially improved.
The content of the invention
Proposed by the present invention is a kind of efficient production method for being cold-pressed Recombined bamboo, and its purpose is intended to using steam-injection preheating,
When slab is compressed into certain density, the temperature inside slab is improved rapidly using the diffusion of high temperature and high pressure steam, so
Continue to heat in hyperthermia tunnel Kiln afterwards；In combination with modified phenol glue, make the reduction of its solidification temperature, so shorten jointly
The hardening time of Recombined bamboo is cold-pressed, hot pressing efficiency is improved, pressure during hot pressing is reduced, while reducing conventional cold pressing Recombined bamboo has
Jump silk, cracking, the defect such as internal stress is big.
The technical solution of the present invention：A kind of efficient production method for being cold-pressed Recombined bamboo, is comprised the technical steps that：
A, dipping process, after thin bamboo strips used for weaving is dried, are impregnated, then 60~80 DEG C of low temperature is done using modified low-temperature solidified phenolic glue
It is dry；
B, charging and steam-injection preheating, the thin bamboo strips used for weaving two ends alignment after impregnation drying is quantitatively mated formation into charging hopper, added
Pressing plate, the height of the slab not compressed now is 3 times high for final sheet metal thickness, will be overwhelmed under it density be about 0.45~
0.65g/cm3When, start to carry out steam-injection preheating from slab both sides or bottom surface, the pressure of steam is 0.4MPa~0.8MPa, is steamed
Time is 30~60 seconds, is adjusted according to the width of the temperature of steam and slab；
C, molding, steam the final thickness that slab is compressed to needs immediately after terminating, throw spacing spiral shell on pressing plate
Follow closely and the other end is tightened into nut and fix, the charging hopper, mould, pressing plate have been required for heating source, it is ensured that its temperature is being kept
At 95~100 DEG C；
D, slab continue to be heating and curing, and the slab for steaming preheating are promoted in hyperthermia tunnel Kiln rapidly together with mould, in kiln
Interior to continue to heat, slab top layer and intermediate layer continue to absorb heat, and adhesive solidifies rapidly, and improved cold pressing bamboo weight just can be made
Group bamboo.
Advantages of the present invention：Bamboo plant is that the speed of growth is most fast on the earth, breeding is easiest to, the maturity period is most short woody
Plant, is the environment-friendly material of the mankind, and it, which has, is once afforested successfully, so that it may which selective cutting every year, continuous utilization are given birth to without destroying
The characteristics of state environment.Existing 6,730,000 hectares of the bamboo grove area in the whole nation, is mainly distributed on national 16 provinces, for cold pressing bamboo Recombined bamboo
Production provides sustainable raw material resources.Cold pressing bamboo Recombined bamboo can also make a utilization rate of the big footpath bamboo wood such as mao bamboon from
20%~50% improves to more than 80%, the utilization rate of bamboo that dwarf bamboo and Cluster Bamboo etc. fail industrialized utilization is also reached
More than 80%.The cold pressing bamboo Recombined bamboo of big specification is produced with the mode for steaming preheating, it is possible to reduce in hot pressing pressure, reduction slab
Internal stress, improve its quality and shorten the heat time.Make it possible the production of the continuous bamboo Recombined bamboo of big specification, be also cold pressing bamboo
The sound development of Recombined bamboo provides safeguard.
Embodiment
A kind of efficient production method for being cold-pressed Recombined bamboo, is comprised the technical steps that：a）Thin bamboo strips used for weaving is using modified low-temperature solid
Change phenol glue dipping；b）Charging and steam-injection preheating；c）Molding；d）Slab is in tunnel cave internal heating curing.
The step a）Thin bamboo strips used for weaving is using modified low-temperature solidified phenolic glue dipping, after thin bamboo strips used for weaving is dried, using modified low-temperature solid
Change phenol glue dipping, then 60~80 DEG C of dryings of low temperature.
The step b）Charging and steam-injection preheating, the thin bamboo strips used for weaving two ends alignment after impregnation drying is quantitatively mated formation to charging hopper
Neutralize in mould, a block pressur plate is put on slab, it is depressed into downwards to density for 0.45~0.65g/cm3When, start from slab two
Numerous apertures on the hopper and mould of side carry out steam-injection preheating, and the pressure of steam is 0.4MPa~0.8MPa, and steam injection time is
30~60 seconds, it is adjusted according to the width of the temperature of steam and slab, when vapor (steam) temperature is high, steam injection time suitably shortens；Plate
When base width increases, steam injection time increase.
The step c）Molding, steams the final thickness 140mm that slab is compressed to needs immediately after terminating, on pressing plate
Face throws stop screw into and its one end is tightened into nut and fixes, and the other end is the cap head of screw, charging hopper, mould, the pressing plate
Heating source has been required for it, it is ensured that its temperature is being maintained at 95~100 DEG C.
The step d）Slab continues to be heating and curing, and will steam preheated slab together with mould and promotes high temp tunnel rapidly
In kiln, continue to heat 2~5 hours in kiln, make slab top layer and intermediate layer continue to absorb heat, adhesive solidifies rapidly, just
Improved cold pressing Recombined bamboo can be made.
It can also be and steam-injection preheating is carried out to the cold pressing recombinant material of other fiber-like materials, the material of the recombinant material can be
Wooden veneer bar, straw unit material.
Claims (1)
1. a kind of efficient production method for being cold-pressed Recombined bamboo, it is characterized in that：This method is comprised the technical steps that：
a）Modified low-temperature solidified phenolic glue dipping：After thin bamboo strips used for weaving is dried, impregnated using modified low-temperature solidified phenolic glue, then low temperature
60~80 DEG C of dryings；
b）Charging and steam-injection preheating：Quantitatively mat formation the thin bamboo strips used for weaving two ends alignment after impregnation drying into charging hopper and in mould,
A block pressur plate is put on slab, it is depressed into downwards to density for 0.45~0.65g/cm3When, start the hopper and mould from slab both sides
Numerous apertures on tool carry out steam-injection preheating, and the pressure of steam is 0.4MPa~0.8MPa, and steam injection time is 30~60 seconds, according to
The temperature of steam and the width of slab are adjusted, and vapor (steam) temperature is high, and steam injection time suitably shortens；When width of plate slab increases, increase
Plus steam injection time；
c）Molding：The final thickness 140mm that slab is compressed to needs immediately after terminating is steamed, limit is thrown on slab pressing plate
Its one end is simultaneously tightened nut and fixed by position screw, it is ensured that charging hopper, mould, the temperature of pressing plate are held in 95~100 DEG C；
d）Slab is in tunnel cave internal heating curing：Slab after molding is promoted in hyperthermia tunnel Kiln rapidly together with mould, in kiln
It is interior to continue to heat 2~5 hours, make slab top layer and intermediate layer continue to absorb heat, adhesive solidifies rapidly, and improvement just can be made
Cold pressing Recombined bamboo.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106363725B (en) * | 2016-09-06 | 2017-10-10 | 南京林业大学 | A kind of manufacture method of arbitrarily long cold pressing Recombined bamboo |
| CN106738184B (en) * | 2017-01-06 | 2022-06-21 | 福建省永安林业（集团）股份有限公司永安人造板厂 | Production method and production device of aldehyde-free medium-density fiberboard |
| CN106926325A (en) * | 2017-03-03 | 2017-07-07 | 西南林业大学 | A kind of apparatus and method of the pre- thermal acceleration thermosetting resin solidification of steam penetration |
| CN107498656B (en) * | 2017-07-25 | 2021-06-25 | 南京林业大学 | Efficient production method of small-diameter wood composite material |
| CN108145826A (en) * | 2018-01-30 | 2018-06-12 | 江西鼎宏生物科技有限公司 | Utilize the method for bamboo making iron Dan Mu |
| CN112493894B (en) * | 2020-11-29 | 2022-09-30 | 湖南省新化县伟星竹木制品有限公司 | Deformation-resistant and cracking-resistant bamboo-wood composite chopping board and preparation method thereof |
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Application publication date: 20151111 Assignee: Fujian Province bamboo science and Technology Co., Ltd. Assignor: Nanjing Forestry University Contract record no.: 2018320000411 Denomination of invention: Efficient production method for cold-pressed recombined bamboo timber Granted publication date: 20171010 License type: Common License Record date: 20181219 |
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Application publication date: 20151111 Assignee: Yongan Yalin Bamboo Research Institute Co., Ltd. Assignor: Nanjing Forestry University Contract record no.: 2018320000436 Denomination of invention: Efficient production method for cold-pressed recombined bamboo timber Granted publication date: 20171010 License type: Common License Record date: 20181225 |
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