CN102398287A - Method for producing bamboo-wood composite board - Google Patents
Method for producing bamboo-wood composite board Download PDFInfo
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- CN102398287A CN102398287A CN201110250865XA CN201110250865A CN102398287A CN 102398287 A CN102398287 A CN 102398287A CN 201110250865X A CN201110250865X A CN 201110250865XA CN 201110250865 A CN201110250865 A CN 201110250865A CN 102398287 A CN102398287 A CN 102398287A
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Abstract
The invention relates to a method for producing a building composite rubber plate, in particular to a method for producing a bamboo-wood composite board. The method for producing the bamboo-wood composite board is implemented by the following technical scheme that the method for producing the bamboo-wood composite board comprises the following steps of: (1) preparation of a core board and a surface board; and (2) compounding process of the core board and the surface board. The bamboo-wood composite board prepared by implementing the method disclosed by the invention has the advantages of low buckling deformation and high static bending strength.
Description
Technical field
The present invention relates to the production method of the production method of construction material composite slab rubber, particularly a kind of bamboo-wood plyboard.
Background technology
China belongs to Shaolin country, has forest reserves per capita less than 9.1m
3, the timber supply and demand is very nervous.Along with the rise of interior design, the wood floors demand sharply increases in recent years, and the manufacturing of China's wood floors depends on from ground imports such as Southeast Asia, Africa with material always for a long time.Yet, along with the whole world in recent years to the attention of ecological environment, make each timber exported country reduce one after another and limited the log outlet.Caused wood floors there is lack of raw materials with and the rise of price, impel the consumer when choosing the floor, to pay the utmost attention to the rational more non-solid wood class of price floor, like the bamboo floor.These reasons all will force the lasting contraction of solid wood class floor occupation rate of market, in the huge home decoration consumption market of China, and the floor of non-solid wood class, particularly bamboo floor will show more and more actively.
China is the abundantest country of bamboo resource in the world, and wherein industrialized utilization is worth the highest mao bamboon and surpasses 300hm
2, account for 90% of the total mao bamboo woods area in the world.The mao bamboon growth can be cut down utilization in 4 to 5 years rapidly, and its material-structure intensity generally is higher than timber.In addition, the common texture that has aesthetic feeling of general bamboo wood, elegant color and luster, characteristic such as cool in summer and warm in winter all make it be well suited for being used for the making on floor etc.At the beginning of the eighties in last century, the bamboo floor begins to come across market, because it is in many-sided advantages such as structure, texture, color and lusters, product just receives consumer's favor once coming out.Even so, bamboo floor is owing to complex manufacturing, and labor productivity is low, thereby product cost is high, is difficult to popularize on a large scale; In addition, bamboo wood also is used for making other daily living article in a large number, and available resource is compared still less with timber; No matter be solid wooden floor board simultaneously, or the bamboo floor, the both has a common shortcoming, and promptly dimensional stability is relatively poor.These factors have all restricted the further expansion in market, bamboo floor.
Bamboo compound floor occurs under these circumstances just and grows up.The product of this most general type is three layers of bamboo compound floor in the market, and it is combined by block board, two bamboo dash boards being positioned at the block board both sides usually.The research and development of bamboo compound floor and production are exactly the complex effect of utilizing bamboo wood and timber; The good characteristic that had both kept bamboo wood; Overcome the defective of artificial fast-growing woods timber again; Have the qualities such as novel and beautiful, tough and hard wear resistant and comfortable safety of bamboo floor and wood floors simultaneously concurrently, thereby realized the optimum utilization of resource, promoted the development of local economy; More help alleviating the nervous situation of China's wood supply, help to accelerate the enforcement of " natural forest protection " engineering.
Yet bamboo-wood plyboard of the prior art exists buckling deformation to reach problems such as MOR is low greatly, influences the market development of product.
Summary of the invention
The purpose of this invention is to provide a kind of bamboo-wood plyboard production method, it is little that the bamboo-wood plyboard of implementing the preparation of this method has buckling deformation, the advantage that MOR is high.
Above-mentioned technical purpose of the present invention is achieved through following technical scheme: a kind of bamboo-wood plyboard production method, and it may further comprise the steps:
(1) preparation of central layer and dash board,
1. the preparation of central layer may further comprise the steps successively:
A, select materials, the timber of choosing pulverized, particle diameter less than the wooden particle of 6mm;
B, will make wooden particle and carry out drying, and make the moisture content of wooden particle reduce to 9% to 11%;
C, wooden particle is made the central layer blank through applying glue, hot pressing, cooling;
D, the central layer blank is cut into sheet material by required size gets central layer;
2. the preparation of dash board may further comprise the steps successively:
A, select materials, the bamboo wood of choosing is whittled into 0.5 to 1.5mm thin bamboo strips used for weaving bar through wood chipping equipment;
B, the thin bamboo strips used for weaving bar is carried out moth-proof and mould-proof handle;
C, the thin bamboo strips used for weaving bar that makes is carried out drying, make the moisture content of thin bamboo strips used for weaving bar reduce to 7% to 9%;
D, will make the dash board blank through applying glue, hot pressing, cooling through the thin bamboo strips used for weaving bar that drying gets;
E, the dash board blank is cut into the sheet material that matches with central layer, promptly gets dash board;
(2) recombination process of central layer and dash board may further comprise the steps successively:
A, central layer, dash board are carried out the adjustment of moisture content, the moisture content that makes central layer is 8% to 10%, and the moisture content of dash board is 6% to 8%;
B, to central layer, dash board carry out applying glue, hot pressing, cool off bamboo grove composite plate blank;
C, with bamboo wood composite blank health 3 to 7 days.
Because artificial fast-growing woods seeds have handling ease, the characteristics that production efficiency is high, the present invention is main with artificial fast-growing woods seeds in the selection of timber, like China fir, poplar etc.; Timber is carried out pulverization process, in order to improve the dimensional stability of central layer; The dried of thin bamboo strips used for weaving bar has not only further prevented growing of moth and mould, and more helps the heat-press step that the thin bamboo strips used for weaving bar continues.
As of the present invention preferred, said step b is: wooden particle is placed on the natural seasoning place earlier, when gas is done to moisture content 35%; Send into dry kiln and carry out force drying, the humidity in the control dry kiln is 70% to 90%, and the time is 5 days to 6 days; The temperature of controlling first day is 50 ℃ to 60 ℃; And 10 ℃ the programming rate that keeps heating up every day, reach 100 ℃ until temperature, make moisture content be reduced to 9% to 11%.
Wooden particle is not only had the effect of moth-proof and mould-proof, help follow-up heat-press step, and help improving the dimensional stability and the water absorption rate of central layer.
As of the present invention preferred; Central layer also comprises the balancing water content step before preparing the c of step described in the process; Soon put between balance conditioning through the dried wooden particle of step b, the control temperature is 20 ℃ to 35 ℃, and humidity is 40% to 60%; Deposited 3 to 5 days, and made the moisture content between each wooden particle balanced.
Make the moisture content between the wooden particle balanced as much as possible, further help follow-up heat-press step.
As of the present invention preferred, central layer prepares in the hot pressing of the step c in the process, and hot pressing temperature is 90 ℃ to 130 ℃, and hot pressing time is 30 min to 40min, and pressure is 3Mpa to 5Mpa.
As of the present invention preferred, dash board prepares the moth-proof and mould-proof of thin bamboo strips used for weaving bar in the process to be handled as follows: earlier the thin bamboo strips used for weaving bar is put into 50 ℃ to 70 ℃ hot water, in hot water, pour 25% to 35% hydrogen peroxide into, the hydrogen peroxide quality is hot water quality's 3% to 5%; Again hot water is boiled heat and keeps 1h to 2h; Take out the thin bamboo strips used for weaving bar then and put into the charing case, the temperature in the control charing case is 120 ℃ to 150 ℃, and humidity is 85% to 95%, and keeps 2h to 4h.
Because the bamboo village contains more nutrition than timber, cause easily mould this with damage by worms, therefore; Must carry out moth-proof and mould-proof to the thin bamboo strips used for weaving bar handles; The present invention adopts charing method, utilizes the environment of high temperature, high humidity, makes organic matter in the thin bamboo strips used for weaving bar like decomposition such as sugar, starch, protein; Make insects such as fungi lose source of nutrition, will kill attached to worm's ovum in the thin bamboo strips used for weaving bar and fungi again simultaneously; And the thin bamboo strips used for weaving bar is after charing is handled, and the bamboo fibre coking becomes bronze-colored or is similar to coffee color, thereby color and luster is simple and unsophisticated, and is peculiar, and in order to make the charing effect better, the present invention adopted hydrogen peroxide the thin bamboo strips used for weaving bar to be carried out the bleaching of appropriateness before charing earlier simultaneously.
As of the present invention preferred, dash board prepares in the hot pressing of the steps d in the process, and hot pressing temperature is 100 ℃ to 150 ℃; Carry out side pressure earlier; Side pressure pressure is 1mpa to 3mpa, and the side pressure time is 2min to 4min, carries out malleation again; Normal pressure is 2mpa to 3mpa, and the malleation time is 6min to 10min.
Carrying out side pressure earlier, is in order to make between the thin bamboo strips used for weaving bar side direction combine closely not have to meet the crack, then to apply positive pressure, up to adhesive solidification.
As of the present invention preferred; Step a in the recombination process of central layer and dash board is following: central layer, dash board are all put into the conditioning room, and the control temperature is 30 ℃ to 45 ℃, and humidity is 70% to 90%; Make the moisture content of central layer be adjusted into 8% to 10%, the moisture content of dash board is adjusted into 6% to 8%.
As of the present invention preferred, the adhesive that the applying glue process of the step b in central layer and the dash board recombination process adopts is the water soluble phenolic resin, and resin added is 200g/m
2To 300g/m
2
As of the present invention preferred, the hot pressing of the step c in central layer and the dash board recombination process in turn includes the following steps:
1. heat the precompressed stage: heating plate is contacted with the material surface, and keep-uping pressure is that 1mpa to 1.5mpa, temperature are 90 ℃ to 100 ℃, and the time is 2min to 3min;
2. packing stage: intensified pressure, making pressure is 3mpa to 5mpa, and temperature is increased to 120 ℃ to 140 ℃, and the time is 5min to 10min;
3. finalize the design the stage: reduce pressure, making pressure is 1.5mpa to 2mpa, and temperature is 80 ℃ to 100 ℃, and the time is 2min to 6min.
As of the present invention preferred, the production method of this kind bamboo-wood plyboard also comprises the japanning step behind central layer and the dash board recombination process, promptly to the surface-coated skin of paint of dash board.
The japanning step is in order further to control the water absorption rate of bamboo-wood plyboard.
In sum, the present invention has following beneficial effect:
1, raw-material sustainability: though the bamboo growth cycle is lacked, become a useful person soon; But it is less to compare the shared share of timber resources; If excessively exploitation causes bamboo wood to degenerate probably, this just requires planned limited bamboo timber resource and the timber resources made good use of; The three-decker of bamboo-wood plyboard, two dash boards adopt bamboo wood, and central layer adopts fast growing wood, and this is beneficial to realizes raw-material sustainable development;
2, scientific and reasonable for structure: intensity is big, that hardness is high bamboo wood is as the dash board material; With fast growing wood as core material; Self regulating power that has strengthened effectively that system's internal stress changes has overcome to a great extent that single bamboo clappers and solid wood board size are unstable, yielding etc. asks;
3, beautiful and comfortable: central layer has used soft fast growing wood, has strengthened the elasticity of this plate, if be used for the floor, then has fabulous feel, has long service life simultaneously; And the bamboo wood surface has characteristics such as quality exquisiteness, clean mark, smooth and natural aesthetic feeling; Charing bamboo wood surface color is simple and unsophisticated, and is peculiar, adds bamboo wood and all be radially texture; Therefore, make the bamboo-wood plyboard of using the present invention's preparation have unique appearance.
MOR and angularity are the important indicators of bamboo compound floor.Temperature, pressure and hot pressing time when the inventor draws central layer and dash board hot pressing in the bamboo wood recombination process through a large amount of experiments is to MOR, the angularity important influence of bamboo-wood plyboard; The particularly temperature of packing stage, pressure, hot pressing time, central layer and the moisture content of dash board before hot pressing also have bigger influence to MOR, the angularity of bamboo-wood plyboard simultaneously.
Bamboo-wood plyboard production method provided by the invention has good anti-song and sticks up performance and MOR for the inventor gets through a large amount of experimental summaries.
Solid wooden compound floor national standard (GB/T 18103-2000) regulation, the MOR of solid wooden compound floor can not be lower than 30MPa; Convexity warp degree≤1.0% of length direction; Convexity warp degree≤0.20% of width.Inventor's the part experimental data to central layer and dash board recombination process is following:
Moisture content-the D1 of central layer is 6% to 12%, and the moisture content-D2 of dash board is 5% to 9%;
The design hot pressing temperature is following: the temperature-A1 in heating precompressed stage is 90 ℃ to 100 ℃; Temperature-the A2 of packing stage is 110 ℃ to 150 ℃; Temperature-the A3 in typing stage is 80 ℃ to 100 ℃;
The design hot pressing pressure is following: the pressure-B1 in heating precompressed stage is 1mpa to 1.5 mpa; Pressure-the B2 of packing stage is 2mpa to 6mpa; Pressure-the B3 in typing stage is 1.5mpa to 2mpa.
The design hot pressing time is following: the time-C1 in heating precompressed stage is 2min to 3min; Time-the C2 of packing stage is 3min to 13min; Time-the C3 in typing stage is respectively 2min to 6min.
Experimental result is seen table 1, as follows
Table 1:
The error of MOR is in ± 0.05, and the error of protruding set-back by table 11, can know that the bamboo-wood plyboard that makes through the present invention has good anti-song and sticks up performance and MOR in ± 0.005.
The specific embodiment
This specific embodiment only is to explanation of the present invention; It is not a limitation of the present invention; Those skilled in the art can make the modification that does not have creative contribution to present embodiment as required after reading this specification, but as long as in claim scope of the present invention, all receive the protection of Patent Law.
Embodiment 1: a kind of bamboo-wood plyboard production method, and it may further comprise the steps:
(1) preparation of central layer and dash board,
1. the preparation of central layer may further comprise the steps successively:
A, to select air-dry density for use be 0.45g/cm
3Poplar is pulverized the timber chosen, particle diameter is 2 to 5mm wooden particle;
B, will make wooden particle and carry out drying, wooden particle is placed on the natural seasoning place earlier, when gas is done to moisture content 35%; Send into dry kiln and carry out force drying, the humidity in the control dry kiln is 70%, and the time is 6 days; The temperature of controlling first day is 50 ℃; And 10 ℃ the programming rate that keeps heating up every day, reach 100 ℃ until temperature, make moisture content be reduced to 9%; For making the moisture content between each wooden particle balanced, also must carry out the balancing water content step, be about to dried wooden particle and put between balance conditioning, the control temperature is 20 ℃, humidity is 40%, deposits 3 days;
C, wooden particle is made the central layer blank through applying glue, hot pressing, cooling; Adhesive adopts the water soluble phenolic resin; Hot pressing temperature is 90 ℃, and hot pressing time is 30 min, and pressure is 3Mpa, after hot pressing is accomplished, takes out the nature cooling;
D, the sheet material that the central layer blank is cut into 2440mm*1220mm*15mm (the wide * of long * is thick) get central layer;
2. the preparation of dash board may further comprise the steps successively:
A, select the bamboo of life in 4 to 6 years for use, the bamboo wood of choosing is whittled into 0.5 to 1.5mm thin bamboo strips used for weaving bar through wood chipping equipment;
B, the thin bamboo strips used for weaving bar is carried out moth-proof and mould-proof handle: earlier the thin bamboo strips used for weaving bar is put into 50 ℃ hot water, in hot water, pour 25% hydrogen peroxide into, the hydrogen peroxide quality is hot water quality's 3%; Again hot water is boiled heat and keeps 1h; Take out the thin bamboo strips used for weaving bar then and put into the charing case, the temperature in the control charing case is 120 ℃, and humidity is 85%, and keeps 2h;
C, the thin bamboo strips used for weaving bar that makes is sent into dry kiln carry out drying, the humidity in the control dry kiln is 70%, and temperature is 60 ℃, and the time is 4 days, makes the moisture content of thin bamboo strips used for weaving bar reduce to 7%;
D, will make the dash board blank through applying glue, hot pressing, cooling through the thin bamboo strips used for weaving bar that drying gets; Adhesive is a phenolic resin; In the hot pressing, hot pressing temperature is 100 ℃, and side direction combines closely not have to meet the crack between the thin bamboo strips used for weaving bar in order to make, and carries out side pressure earlier, and side pressure pressure is 1mpa, and the side pressure time is 2min, carries out malleation again, and normal pressure is 2mpa, and the malleation time is 6min;
E, the dash board blank is cut into the sheet material of two 2440mm*1220mm*10mm (the wide * of long * is thick), promptly gets dash board;
(2) recombination process of central layer and dash board may further comprise the steps successively:
A, central layer, dash board are all put into the conditioning room, carry out the adjustment of moisture content, the control temperature is 30 ℃, and humidity is 70%, makes the moisture content of central layer be adjusted into 8%, and the moisture content of dash board is adjusted into 6%;
B, to central layer, dash board carry out applying glue, hot pressing, cool off bamboo grove composite plate blank; Adhesive is the water soluble phenolic resin, and resin added is 200g/m
2Hot pressing in turn includes the following steps:
1. heat the precompressed stage: heating plate is contacted with the material surface, and keep-uping pressure is that 1mpa, temperature are 90 ℃, and the time is 2min;
2. packing stage: intensified pressure, making pressure is 3mpa, and temperature is increased to 120 ℃, and the time is 5min;
3. finalize the design the stage: reduce pressure, making pressure is 1.5mpa, and temperature is 80 ℃, and the time is 2min;
C, with bamboo wood composite blank health 3 days, 30 ℃ of health temperatures, humidity 15%;
D, japanning step, the surface-coated UV solidified paint to dash board further reduces water absorption rate.
Through detecting, the present embodiment performance is following:
Embodiment 2: a kind of bamboo-wood plyboard production method, and it may further comprise the steps:
(1) preparation of central layer and dash board,
1. the preparation of central layer may further comprise the steps successively:
A, to select air-dry density for use be 0.55g/cm
3China fir is pulverized the timber chosen, particle diameter is 3 to 6mm wooden particle;
B, will make wooden particle and carry out drying, wooden particle is placed on the natural seasoning place earlier, when gas is done to moisture content 35%; Send into dry kiln and carry out force drying, the humidity in the control dry kiln is 80%, and the time is 5 days; The temperature of controlling first day is 60 ℃; And 10 ℃ the programming rate that keeps heating up every day, reach 100 ℃ until temperature, make moisture content be reduced to 10%; For making the moisture content between each wooden particle balanced, also must carry out the balancing water content step, be about to dried wooden particle and put between balance conditioning, the control temperature is 30 ℃, humidity is 50%, deposits 4 days;
C, wooden particle is made the central layer blank through applying glue, hot pressing, cooling; Adhesive adopts the water soluble phenolic resin; Hot pressing temperature is 100 ℃, and hot pressing time is 35min, and pressure is 4Mpa, after hot pressing is accomplished, takes out the nature cooling;
D, the sheet material that the central layer blank is cut into 2500mm*1250mm*15mm (the wide * of long * is thick) get central layer;
2. the preparation of dash board may further comprise the steps successively:
A, select the firm bamboo of life in 5 to 6 years for use, the bamboo wood of choosing is whittled into 0.5 to 1.5mm thin bamboo strips used for weaving bar through wood chipping equipment;
B, the thin bamboo strips used for weaving bar is carried out moth-proof and mould-proof handle: earlier the thin bamboo strips used for weaving bar is put into 60 ℃ hot water, in hot water, pour 30% hydrogen peroxide into, the hydrogen peroxide quality is hot water quality's 4%; Again hot water is boiled heat and keeps 1.5h; Take out the thin bamboo strips used for weaving bar then and put into the charing case, the temperature in the control charing case is 130 ℃, and humidity is 90%, and keeps 3h;
C, the thin bamboo strips used for weaving bar that makes is sent into dry kiln carry out drying, the humidity in the control dry kiln is 65%, and temperature is 50 ℃, and the time is 4 days, makes the moisture content of thin bamboo strips used for weaving bar reduce to 8%;
D, will make the dash board blank through applying glue, hot pressing, cooling through the thin bamboo strips used for weaving bar that drying gets; Adhesive is a phenolic resin; In the hot pressing, hot pressing temperature is 120 ℃, and side direction combines closely not have to meet the crack between the thin bamboo strips used for weaving bar in order to make, and carries out side pressure earlier, and side pressure pressure is 2mpa, and the side pressure time is 3min, carries out malleation again, and normal pressure is 2.5mpa, and the malleation time is 8min;
E, the dash board blank is cut into the sheet material of two 2500mm*1250mm*10mm (the wide * of long * is thick), promptly gets dash board;
(2) recombination process of central layer and dash board may further comprise the steps successively:
A, central layer, dash board are all put into the conditioning room, carry out the adjustment of moisture content, the control temperature is 40 ℃, and humidity is 80%, makes the moisture content of central layer be adjusted into 9%, and the moisture content of dash board is adjusted into 7%;
B, to central layer, dash board carry out applying glue, hot pressing, cool off bamboo grove composite plate blank; Adhesive is the water soluble phenolic resin, and resin added is 250g/m
2Hot pressing in turn includes the following steps:
1. heat the precompressed stage: heating plate is contacted with the material surface, and keep-uping pressure is that 1.2mpa, temperature are 95 ℃, and the time is 2.5min;
2. packing stage: intensified pressure, making pressure is 4mpa, and temperature is increased to 130 ℃, and the time is 7min;
3. finalize the design the stage: reduce pressure, making pressure is 1.8mpa, and temperature is 90 ℃, and the time is 4min;
C, with bamboo wood composite blank health 5 days, 35 ℃ of health temperatures, humidity 20%;
D, japanning step, the surface-coated UV solidified paint to dash board further reduces water absorption rate.
Through detecting, the present embodiment performance is following:
Embodiment 3: a kind of bamboo-wood plyboard production method, and it may further comprise the steps:
(1) preparation of central layer and dash board,
1. the preparation of central layer may further comprise the steps successively:
A, to select air-dry density for use be 0.65g/cm
3Pine is pulverized the timber chosen, particle diameter is 1 to 5mm wooden particle;
B, will make wooden particle and carry out drying, wooden particle is placed on the natural seasoning place earlier, when gas is done to moisture content 35%; Send into dry kiln and carry out force drying, the humidity in the control dry kiln is 90%, and the time is 5 days; The temperature of controlling first day is 60 ℃; And 10 ℃ the programming rate that keeps heating up every day, reach 100 ℃ until temperature, make moisture content be reduced to 11%; For making the moisture content between each wooden particle balanced, also must carry out the balancing water content step, be about to dried wooden particle and put between balance conditioning, the control temperature is 35 ℃, humidity is 60%, deposits 5 days;
C, wooden particle is made the central layer blank through applying glue, hot pressing, cooling; Adhesive adopts the water soluble phenolic resin; Hot pressing temperature is 130 ℃, and hot pressing time is 40min, and pressure is 5Mpa, after hot pressing is accomplished, takes out the nature cooling;
D, the sheet material that the central layer blank is cut into 2500mm*1250mm*15mm (the wide * of long * is thick) get central layer;
2. the preparation of dash board may further comprise the steps successively:
A, select the mao bamboon of life in 5 years for use, the bamboo wood of choosing is whittled into 0.5 to 1.5mm thin bamboo strips used for weaving bar through wood chipping equipment;
B, the thin bamboo strips used for weaving bar is carried out moth-proof and mould-proof handle: earlier the thin bamboo strips used for weaving bar is put into 70 ℃ hot water, in hot water, pour 35% hydrogen peroxide into, the hydrogen peroxide quality is hot water quality's 5%; Again hot water is boiled heat and keeps 2h; Take out the thin bamboo strips used for weaving bar then and put into the charing case, the temperature in the control charing case is 150 ℃, and humidity is 95%, and keeps 4h;
C, the thin bamboo strips used for weaving bar that makes is sent into dry kiln carry out drying, the humidity in the control dry kiln is 70%, and temperature is 50 ℃, and the time is 3 days, makes the moisture content of thin bamboo strips used for weaving bar reduce to 9%;
D, will make the dash board blank through applying glue, hot pressing, cooling through the thin bamboo strips used for weaving bar that drying gets; Adhesive is a phenolic resin; In the hot pressing, hot pressing temperature is 150 ℃, and side direction combines closely not have to meet the crack between the thin bamboo strips used for weaving bar in order to make, and carries out side pressure earlier, and side pressure pressure is 3mpa, and the side pressure time is 4min, carries out malleation again, and normal pressure is 3mpa, and the malleation time is 10min;
E, the dash board blank is cut into the sheet material of two 2500mm*1250mm*10mm (the wide * of long * is thick), promptly gets dash board;
(2) recombination process of central layer and dash board may further comprise the steps successively:
A, central layer, dash board are all put into the conditioning room, carry out the adjustment of moisture content, the control temperature is 45 ℃, and humidity is 90%, makes the moisture content of central layer be adjusted into 10%, and the moisture content of dash board is adjusted into 8%;
B, to central layer, dash board carry out applying glue, hot pressing, cool off bamboo grove composite plate blank; Adhesive is the water soluble phenolic resin, and resin added is 300g/m
2Hot pressing in turn includes the following steps:
1. heat the precompressed stage: heating plate is contacted with the material surface, and keep-uping pressure is that 1.5mpa, temperature are 100 ℃, and the time is 3min;
2. packing stage: intensified pressure, making pressure is 5mpa, and temperature is increased to 140 ℃, and the time is 10min;
3. finalize the design the stage: reduce pressure, making pressure is 2mpa, and temperature is 100 ℃, and the time is 6min;
C, with bamboo wood composite blank health 5 days, 35 ℃ of health temperatures, humidity 15%;
D, japanning step, the surface-coated UV solidified paint to dash board further reduces water absorption rate.
Through detecting, the present embodiment performance is following:
Claims (10)
1. bamboo-wood plyboard production method is characterized in that it may further comprise the steps:
(1) preparation of central layer and dash board,
1. the preparation of central layer may further comprise the steps successively:
A, select materials, the timber of choosing pulverized, particle diameter less than the wooden particle of 6mm;
B, will make wooden particle and carry out drying, and make the moisture content of wooden particle reduce to 9% to 11%;
C, wooden particle is made the central layer blank through applying glue, hot pressing, cooling;
D, the central layer blank is cut into sheet material by required size gets central layer;
2. the preparation of dash board may further comprise the steps successively:
A, select materials, the bamboo wood of choosing is whittled into 0.5 to 1.5mm thin bamboo strips used for weaving bar through wood chipping equipment;
B, the thin bamboo strips used for weaving bar is carried out moth-proof and mould-proof handle;
C, the thin bamboo strips used for weaving bar that makes is carried out drying, make the moisture content of thin bamboo strips used for weaving bar reduce to 7% to 9%;
D, will make the dash board blank through applying glue, hot pressing, cooling through the thin bamboo strips used for weaving bar that drying gets;
E, the dash board blank is cut into the sheet material that matches with central layer, promptly gets dash board;
(2) recombination process of central layer and dash board may further comprise the steps successively:
A, central layer, dash board are carried out the adjustment of moisture content, the moisture content that makes central layer is 8% to 10%, and the moisture content of dash board is 6% to 8%;
B, to central layer, dash board carry out applying glue, hot pressing, cool off bamboo grove composite plate blank;
C, with bamboo wood composite blank health 3 to 7 days.
2. a kind of bamboo-wood plyboard production method according to claim 1 is characterized in that said step b is: wooden particle is placed on the natural seasoning place earlier; When gas is done to moisture content 35%, send into dry kiln and carry out force drying, the humidity in the control dry kiln is 70% to 90%; Time is 5 days to 6 days, and the temperature of controlling first day is 50 ℃ to 60 ℃, and 10 ℃ the programming rate that keeps heating up every day; Reach 100 ℃ until temperature, make moisture content be reduced to 9% to 11%.
3. a kind of bamboo-wood plyboard production method according to claim 2; It is characterized in that central layer also comprises the balancing water content step before preparing the c of step described in the process, soon puts between balance conditioning through the dried wooden particle of step b; The control temperature is 20 ℃ to 35 ℃; Humidity is 40% to 60%, deposits 3 to 5 days, makes the moisture content between each wooden particle balanced.
4. a kind of bamboo-wood plyboard production method according to claim 1 is characterized in that central layer prepares in the hot pressing of the step c in the process, and hot pressing temperature is 90 ℃ to 130 ℃, and hot pressing time is 30 min to 40min, and pressure is 3Mpa to 5Mpa.
5. a kind of bamboo-wood plyboard production method according to claim 1; It is characterized in that; Dash board prepares the moth-proof and mould-proof of thin bamboo strips used for weaving bar in the process to be handled as follows: earlier the thin bamboo strips used for weaving bar is put into 50 ℃ to 70 ℃ hot water; In hot water, pour 25% to 35% hydrogen peroxide into, the hydrogen peroxide quality is hot water quality's 3% to 5%; Again hot water is boiled heat and keeps 1h to 2h; Take out the thin bamboo strips used for weaving bar then and put into the charing case, the temperature in the control charing case is 120 ℃ to 150 ℃, and humidity is 85% to 95%, and keeps 2h to 4h.
6. a kind of bamboo-wood plyboard production method according to claim 1 is characterized in that dash board prepares in the hot pressing of the steps d in the process; Hot pressing temperature is 100 ℃ to 150 ℃, carries out side pressure earlier, and side pressure pressure is 1mpa to 3mpa; The side pressure time is 2min to 4min; Carry out malleation again, normal pressure is 2mpa to 3mpa, and the malleation time is 6min to 10min.
7. a kind of bamboo-wood plyboard production method according to claim 1; It is characterized in that; Step a in the recombination process of central layer and dash board is following: central layer, dash board are all put into the conditioning room, and the control temperature is 30 ℃ to 45 ℃, and humidity is 70% to 90%; Make the moisture content of central layer be adjusted into 8% to 10%, the moisture content of dash board is adjusted into 6% to 8%.
8. the production method of a kind of bamboo-wood plyboard according to claim 1 is characterized in that, the adhesive that the applying glue process of the step b in central layer and the dash board recombination process adopts is the water soluble phenolic resin, and resin added is 200g/m
2To 300g/m
2
9. the production method of a kind of bamboo-wood plyboard according to claim 1 is characterized in that, the hot pressing of the step c in central layer and the dash board recombination process in turn includes the following steps:
1. heat the precompressed stage: heating plate is contacted with the material surface, and keep-uping pressure is that 1mpa to 1.5mpa, temperature are 90 ℃ to 100 ℃, and the time is 2min to 3min;
2. packing stage: intensified pressure, making pressure is 3mpa to 5mpa, and temperature is increased to 120 ℃ to 140 ℃, and the time is 5min to 10min;
3. finalize the design the stage: reduce pressure, making pressure is 1.5mpa to 2mpa, and temperature is 80 ℃ to 100 ℃, and the time is 2min to 6min.
10. the production method of a kind of bamboo-wood plyboard according to claim 1 is characterized in that, the production method of this kind bamboo-wood plyboard also comprises the japanning step behind central layer and the dash board recombination process, promptly to the surface-coated skin of paint of dash board.
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