CN103144153A - Manufacturing method of whole-piece bamboo-bunch veneer and overlong bamboo-bunch laminated veneer lumber - Google Patents
Manufacturing method of whole-piece bamboo-bunch veneer and overlong bamboo-bunch laminated veneer lumber Download PDFInfo
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Abstract
The invention discloses a manufacturing method of a whole-piece bamboo-bunch veneer and an overlong bamboo-bunch laminated veneer lumber. The method comprises the specific steps that a raw material is selected and pretreated; bamboo wood is conveyed to brooming rolling equipment in a rift grain direction; the conveyed bamboo wood is broomed, beaten and rolled by the equipment, and is subjected to devillicate treatment after a plurality of periods to be manufactured into bunchiness fibers with uniform specifications; bunchiness fiber units that are arranged tightly and orderly in the rift grain direction are discharged; the bunchiness fiber units are sewn or bonded to ensure that the bunchiness fiber units in the same row are connected together; a bamboo-bunch veneer is manufactured; the whole-piece bamboo-bunch veneer is manufactured; a plurality of whole-piece bamboo-bunch veneers are overlaid, assembled, and subjected to cold pressing and heat pressing treatment; and the finished overlong bamboo-bunch laminated veneer lumber is manufactured. The whole-piece bamboo-bunch veneer and the overlong bamboo-bunch laminated veneer lumber manufactured by the method are uniform in density; the raw material can be saved greatly on the premise that national standards are met; bamboo green and tabasheer in the raw bamboo wood can be kept; and bamboo wood consumption and waste of manpower and material resources caused by removing the bamboo green and the tabasheer in the prior art can be avoided.
Description
Technical field
The invention belongs to artificial bamboo board and make the field, the preparation method of a kind of whole Zhang Huazhu bundle veneer and overlength bamboo bundle laminated veneer lumber especially is provided.
Background technology
China's bamboo timber resource is abundant, and the bamboo grove area has reached 538.1 ten thousand hectares, but bamboo have be easy to plant, fast growth, cycle are short, the characteristics of afforestation continuous utilization once, are widely used in producing wood-based plate.Artificial bamboo board is divided into the 5 large classes such as bamboo plywood, bamboo cord wood, bamboo particle board, Recombined bamboo and bamboo-wood plyboard according to the structure of the raw material variety, Component units geometric shape and the sheet material thereof that form sheet material, Component units is the important means that artificial bamboo board is made, and the main composition unit of artificial bamboo board is the laminated timber of thin bamboo strips used for weaving and the bamboo curtain splint that is formed by the thin bamboo strips used for weaving braiding, bamboo mat, bamboo chip, fibrillatable bamboo bundle etc. at present.in above-mentioned bamboo wood raw material, bamboo strip and the difficult gummed of yellow bamboo face due to bamboo wood, therefore in prior art, bamboo curtain splint, bamboo mat, bamboo chip are to need to remove Outer part and inner part of the bamboo mostly in producing process, generally to discongest by rolling, former bamboo is carried out controlled separation, make the composite preparation reach the wide spectrum designability, bamboo wood is raw-material to be expended in a large number but the result of processing like this will certainly cause, in addition, fibrillatable bamboo bundle is produced in process, bamboo bundle fiber density and in uneven thickness, further cause fibrillatable bamboo bundle plate blank paving inhomogeneous, make the complex procedures of making its wood-based plate, inefficiency, and the Density inhomogeneity that easily causes final products, for reaching the qualification rate of product, can only be up to standard according to the minimum density partial test of product, thereby cause the waste of material of more much density portions and mechanical strength superfluous, also can produce because weight is relatively heavier simultaneously follow-up series of problems (as too much power consumption and fuel oil in carrying effort and transportation), in this case, not only waste raw material, also can waste energy greatly in the production and transport link, and China is great industry nation, well imagine, its waste that causes is how huge.
At present, maximum breadth major part of the hot-press equipment of China wood-based plate processing enterprise is 2.44m * 1.22m, so processing length must adopt cold-press process greater than the recombinant material of 2.44m, not only takies larger production site and labour, and inefficiency.Therefore, exploitation length has great importance greater than the technology upgrading to the present artificial board enterprise of China of the bamboo bundle laminated veneer lumber of 2.44m.
Summary of the invention
Main purpose of the present invention is to provide a kind of preparation method of whole Zhang Huazhu bundle veneer, and the whole Zhang Huazhu bundle veneer that the method is made can be made and even density by the full material of bamboo wood.
For achieving the above object, the present invention takes following design:
A kind of preparation method of whole Zhang Huazhu bundle veneer, its method step is as follows:
1) choose the long bamboo wood of 0.50-20m, process by cold water, hot water or vapours, make the bamboo wood moisture content reach 30-60%;
2) produce the bundle fiber unit: above-mentioned pretreated bamboo wood is sent into the brooming rolling apparatus by the rift grain direction, this equipment carries out brooming, beats with roller compaction processes and process the bamboo wood of input, make the bundle fiber of even specification through some cycle rear sub-wires, and be that output is by the neat bundle fiber unit of rift grain direction close-packed arrays;
3) the bundle fiber unit is made or bonding so that link together with row's bundle fiber, produced bamboo bundle veneer;
4) the bamboo bundle veneer with one group of even density and stack pile is stitched together by docking, overlap joint and mitered, produces the whole Zhang Huazhu bundle veneer that length is not less than 2.44m.
In the preparation method of described whole Zhang Huazhu bundle veneer, the bamboo wood standard of choosing in described step 1 is: diameter is less than or equal to the little bamboo footpath bamboo stalk of 3cm, selects full material; Diameter is greater than the big bamboo footpath bamboo stalk of 3cm, and subdivision is also removed inside and outside ring.
In the preparation method of described whole Zhang Huazhu bundle veneer, in described step 2, the bundle fiber of the even specification that makes is to process through reducing along bamboo stalk fiber direction Strength retention, fiber transverse strength, the while or additional through the heteroproteose cell Transformatin.
In the preparation method of described whole Zhang Huazhu bundle veneer, be sewing line or laid tree lace on the bundle fiber unit in described step 3; The track of this sewing line or laid tree lace is the parallel straight line in some rows interval; Or being one or more parallel continuous zigzag folding line, zigzag trajectory and axis, bundle fiber unit angle a are 30 °-150 °; Also or be continuous S type curve that one or more is parallel.
In the preparation method of described whole Zhang Huazhu bundle veneer, in described step 4, adjacent layer termination place distance is not less than 90mm.
Another object of the present invention is to provide a kind of preparation method of overlength bamboo bundle laminated veneer lumber, and it can overcome the deficiencies in the prior art, realizes the further upgrading of man-made board technology.
For achieving the above object, the present invention takes following design:
A kind of preparation method of overlength bamboo bundle laminated veneer lumber, its method step is as follows:
1) restraint veneer stack assembly with one group by the above-mentioned whole Zhang Huazhu that makes;
2) assembly is pressed into original depth in advance by being sent into by the roller loading bay in cold press;
3) continue to be fed into again intermittently hot pressing of hot press, obtain the overlength bamboo bundle laminated veneer lumber plate of final thickness.
Or:
A kind of preparation method of overlength bamboo bundle laminated veneer lumber, its method step is as follows:
1) form a unit base with some by the stack of above-mentioned prepared whole Zhang Huazhu bundle veneer respectively, then with one group of continuous assembly of unit base;
2) assembly is pressed into original depth in advance by being sent into by the roller loading bay in cold press;
3) continue to be fed into again intermittently hot pressing of hot press, obtain the overlength bamboo bundle laminated veneer lumber plate of final thickness.
In the preparation method of described overlength bamboo bundle laminated veneer lumber, with the overlength bamboo bundle laminated veneer lumber that obtains after completing continue the preorder method again through cutting operation to standard length.In the preparation method of described overlength bamboo bundle laminated veneer lumber, when hot press hot pressing, if the adhesive that uses is phenolic resins, hot pressing time is 0.5-2min/mm, and hot pressing temperature is 120-180 ℃, and hot pressing pressure is 0.5-9MPa; If adhesive is isocyanates, hot pressing time is 0.5-1.2min/mm, and hot pressing temperature is 80-130 ℃, and hot pressing pressure is 0.5-9MPa.
The bamboo bundle laminated veneer lumber that the inventive method is made, use bamboo stalk (large footpath bamboo subdivision, dwarf bamboo directly utilizes) directly brooming roll and make its upper bamboo fiber bundle of Outer part and inner part of the bamboo in addition, make the laminated timber of looking continuously of function admirable by comprising special bamboo bundle fullveneer unitization, intermittently hot pressing, continuous spreading forming technique, make the dwarf bamboo that can not take full advantage of in a large amount of prior aries be utilized, and make that hot-press equipment is simple, processing is easier, production efficiency is higher, the laminated timber density that makes is lower, intensity is higher, length is continuous.
Advantage of the present invention is:
1. whole Zhang Huazhu bundle veneer even density, the thickness made of the inventive method are identical, not only can further make bamboo bundle laminated veneer lumber, also can be conveniently and the synthetic processing and utilization again of other veneer (such as veneer etc.), thereby can obtain more diversified product, satisfy the different demands of building trade.
2. the convenient further intermittently hot pressing of whole Zhang Huazhu bundle veneer of the inventive method making, continuous spreading forming technique puts to good use, can make the laminated timber of the continuous length of function admirable, make the dwarf bamboo that can not take full advantage of in a large amount of prior aries also be utilized, and make that hot-press equipment is simple, processing is easier, production efficiency is higher.
3. the overlength bamboo bundle laminated veneer lumber of making of the inventive method, because density of material and the structural strength of each layer bamboo bundle ply are all consistent or approaching, make integral product density of material and structural strength all consistent or approach, thereby under the prerequisite that can satisfy national standard, can save material by a relatively large margin, and can bring a series of positive chain effects such as transportation;
4. in the inventive method, can keep the Outer part and inner part of the bamboo in the raw material bamboo wood, avoid removing in the prior art that bamboo wood that Outer part and inner part of the bamboo causes expends and the waste of the manpower and materials that therefore cause; Can take full advantage of various bamboo woods, and make following process finished product material more convenient and quicker.
Description of drawings
Fig. 1 is the structural representation of the bundle fiber unit produced of the inventive method.
Fig. 2 is that the present invention makes the pencil fiber element or a bonding embodiment schematic diagram.
Fig. 3 is that the present invention makes the pencil fiber element or another bonding embodiment schematic diagram.
Fig. 4 is that the present invention makes the pencil fiber element or bonding another embodiment schematic diagram.
Fig. 5 is that the present invention makes the pencil fiber element or a bonding embodiment schematic diagram again.
Fig. 6 is the schematic diagram that the present invention makes overlength bamboo bundle laminated veneer lumber.
Fig. 7 is the schematic diagram of termination distance W after two bamboo bundle veneer splicings in the inventive method.
The present invention is described further below in conjunction with drawings and the specific embodiments.
The specific embodiment
The concrete steps that the present invention makes whole Zhang Huazhu bundle veneer are: 1) raw material are chosen and pretreatment; 2) produce the bundle fiber unit; 3) making of bamboo bundle veneer; 4) complete the making of whole Zhang Huazhu bundle veneer.
The concrete grammar step that the present invention makes overlength bamboo bundle laminated veneer lumber is: 1) with one group of whole Zhang Huazhu bundle veneer stack assembly; 2) cold pressing; 3) hot pressing.Or: 1) the continuous stack of some whole Zhang Huazhu bundle veneer stacks is formed a unit base, then with one group of continuous assembly of unit base; 2) cold pressing; 3) hot pressing.The overlength bamboo bundle laminated veneer lumber that obtains after hot pressing can further cut to predefined needed length
Described raw material are chosen and pretreatment: be to choose the long bamboo wood of 0.50-20m, process through subcooled water, hot water or vapours, make the bamboo wood moisture content reach 30-60%.
The described bundle fiber unit produced: be that above-mentioned pretreated bamboo wood is sent into the brooming rolling apparatus by the rift grain direction, this equipment carries out brooming, beats with roller compaction processes and process the bamboo wood of input, make the bundle fiber of even specification through some cycle rear sub-wires, and be that output is by the neat bundle fiber unit of rift grain direction close-packed arrays.in this step, the brooming rolling apparatus of use (referring to Fig. 1, Fig. 2), the applicant has submitted patent application (number of patent application: 201210413865.1 on October 25th, 2012 to China national Department of Intellectual Property, name is called: " a kind of bamboo wood brooming rolling apparatus "), in this application, formation and the operation principle of this bamboo wood brooming rolling apparatus are disclosed, so introduce no longer in detail, include brooming mechanism in this equipment, rolling body, beat mechanism and bamboo wood transmission conveying to be processed can be crossed brooming, roll and beat the transmission mechanism of operating area, therefore the bamboo wood stalk stem after saving that goes of input can be carried out brooming, beat and roll, can realize that transverse strength reduces, producing of the bamboo fiber bundle that longitudinal strength keeps, further removed again heteroproteose cell to having removed the bamboo stalk after the ring simultaneously, can solve the disadvantage that Outer part and inner part of the bamboo is difficult for gummed, can improve mechanical strength and the bonding strength of ultimate product artificial bamboo board.Therefore the bamboo fiber bundle that makes through this bamboo wood brooming rolling apparatus can obtain along the Transformatin of bamboo stalk fiber direction Strength retention, fiber transverse strength reduction processing and heteroproteose cell.
By this equipment, make selection of the present invention more wide in range, be less than or equal to the little bamboo footpath bamboo stalk of 3cm for diameter, can select full material is the former material of brooming rolling apparatus sub-wire processing, directly sends into the brooming unit of brooming rolling apparatus.For the big bamboo footpath bamboo stalk of diameter greater than 3cm, but subdivision and remove inside and outside ring after send into brooming rolling apparatus sub-wire processing bamboo fiber bundle; Both all send into the brooming rolling apparatus by the rift grain direction.The bamboo wood of sending into equipment the subdivision such as divides other brooming, beats and rolls along bamboo stalk fiber direction, through cycle brooming roller compaction processes repeatedly, reaching bamboo fiber bundle 1 diameter is that the 0.10-2.5mm distribution (is pressed mutual rift grain direction marshalling closely, fibrillatable bamboo beam width reaches 3-7 times of original bamboo stalk arc length), namely obtain qualified bamboo fiber bundle unit 10, shown in Figure 1.
The making of described bamboo bundle veneer: further, bamboo fiber bundle is adopted the method spelling of stitching or laid tree lace by rift grain direction (being that each layer bamboo fiber bundle is by the grain direction that is parallel to bamboo fiber bundle), to become the bamboo bundle veneer of whole change, concrete sew up or the track of laid tree lace can be the parallel straight line 2(in some rows interval as shown in Figure 2), each straight line 2 tracks cover the bamboo fiber bundle 1 that all rows are arranged in parallel, and the interval L of two straight paths of adjacent spaces is not more than 1.3m.Or the track of stitching or laid tree lace as shown in Figure 3, is a zigzag folding line in this embodiment for one or more parallel continuous zigzag folding line 3, and the trajectory of each Z-shaped unit should cover the bamboo fiber bundle that all rows are arranged in parallel; Described zigzag folding line and bamboo bundle veneer axis angle a are 30 °-150 °.The track of stitching or laid tree lace is that the example signal of many continuous zigzag folding lines 3 that walk abreast can be referring to Fig. 4; Or the track of stitching or laid tree lace can also be one or more parallel continuous S type curve; and parallel trajectory should cover the bamboo fiber bundle that all rows are arranged in parallel; these trajectories should be able to guarantee bamboo fiber bundle that all rows are arranged in parallel all adhesion or seam connect together (in being not more than the gap length of 1.3m) mutually; referring to Fig. 5, be two parallel continuous S type curves.
By above-mentioned making and the bonding making of completing bamboo bundle veneer.
Above-mentioned bamboo bundle veneer is further dry, make bamboo fiber bundle gas do to moisture content 8-15%.
Again above-mentioned bamboo fiber bundle plate is carried out applying glue: if the adhesive that uses is phenolic resins, adopt the impregnation glue applying method, the solid content of phenolic resins is the 5-30% of bamboo fiber bundle board raw material oven dry weight, the solid content of phenolic resin adhesive is between 5-25%, adopt the normal temperature impregnation, the impregnation time is 3-15min, take out outstanding do do not drip to adhesive till.If the adhesive that uses is isocyanates, adopt the spraying glue applying method, the solid content of isocyanates is the 3-18% of bamboo fiber bundle raw material oven dry weight, adopts the even applying glue of spraying coating process on the two sides of bamboo fiber bundle plate.
Can carry out redrying: above-mentioned sized bamboo fiber bundle plate is carried out redrying again, reach top layer moisture content 20-40%.
In the splicing of the bamboo bundle veneer termination of some above-mentioned applying glues, each adjacent bamboo bundle veneer docks mutually, overlap joint and mitered splicing, and the end in contact of joining distance should be not less than two any termination distance W of 90mm(and be not less than 90mm; Termination comprises adjacent layer termination distance and non-adjacent layer termination distance; Referring to Fig. 7, a is the tip node of upper strata bamboo bundle veneer, and b is that the intermediate layer is the tip node of adjacent layer bamboo bundle veneer, and c is that lower floor is the tip node of non-adjacent layer bamboo bundle veneer); Further carry out the room temperature precompressed, pressure is 0.5-15MPa, keeps 3-15min; With the bamboo bundle veneer drying of pre-molding to moisture content 8-15%.Completed the making of whole Zhang Huazhu bundle veneer.
Overlength bamboo bundle laminated veneer lumber of the present invention adopts the continuous grafting technique method processing of intermittently hot pressing; For realizing the method, the present invention has designed the production and processing line that is different from prior art, shown in Figure 6, with cold press 300 and the hot press 400 front and back layout that continues, before cold press 300 and be to be provided with a roller loading bay 200 after following the assembly platform 100 of bamboo bundle veneer closely, establish roller Transport Desk 500 after hot press 400.The continuous spreading procedure of this hot pressing at intermittence is: one group of bamboo bundle ply assembly that mutually superposes is sent into first by roller loading bay 200 that cold press 300 is interior is pressed into original depth in advance, then continue to be fed into the overlength bamboo bundle laminated veneer lumber plate that obtains final thickness after the interior hot pressing of hot press 400; Or the continuous stack of some whole Zhang Huazhu bundle veneer stacks is formed a unit base, again one group of continuous assembly of unit base is sent into first by roller loading bay 200 that cold press 300 is interior is pressed into original depth in advance, then continued to be fed into the overlength bamboo bundle laminated veneer lumber plate that obtains final thickness after the interior hot pressing of hot press 400; After the finished product of being sent by hot press 400, overlength bamboo bundle laminated veneer lumber plate is after 500 transmission of roller Transport Desk, again through cutting operation (purpose: continuous overlength bamboo bundle laminated veneer lumber is cut to certain-length), arrival falls into a little, piles up to be overlength bamboo bundle laminated veneer lumber straight sheet pile 600.
Wherein, adopt heat to advance that heat goes out, the hot-press solidifying moulding when hot press 400 interior hot pressing.If the adhesive that uses is phenolic resins, hot pressing time is 0.5-2min/mm, hot pressing temperature 120-180 ℃, and hot pressing pressure 0.5-9MPa; If adhesive is isocyanates, hot pressing time is 0.5-1.2min/mm, and hot pressing temperature is 80-130 ℃, and hot pressing pressure is 0.5-9MPa.The overlapping charging of 10-500mm long measure.
The various embodiments described above can some variations in addition under not departing from the scope of the present invention, thus above explanation comprise should be considered as exemplary, but not in order to limit the protection domain of the present patent application patent.
Claims (9)
1. the preparation method of a whole Zhang Huazhu bundle veneer is characterized in that method step is as follows:
1) choose the long bamboo wood of 0.50-20m, process by cold water, hot water or vapours, make the bamboo wood moisture content reach 30-60%;
2) produce the bundle fiber unit: above-mentioned pretreated bamboo wood is sent into the brooming rolling apparatus by the rift grain direction, this equipment carries out brooming, beats with roller compaction processes and process the bamboo wood of input, make the bundle fiber of even specification through some cycle rear sub-wires, and be that output is by the neat bundle fiber unit of rift grain direction close-packed arrays;
3) the bundle fiber unit is made or bonding so that link together with row's bundle fiber, produced bamboo bundle veneer;
4) the bamboo bundle veneer with one group of even density and stack pile is stitched together by docking, overlap joint and mitered, produces the whole Zhang Huazhu bundle veneer that length is not less than 2.44m.
2. the preparation method of whole Zhang Huazhu bundle veneer according to claim 1, it is characterized in that: the bamboo wood standard of choosing in described step 1 is: diameter is less than or equal to the little bamboo footpath bamboo stalk of 3cm, selects full material; Diameter is greater than the big bamboo footpath bamboo stalk of 3cm, and subdivision is also removed inside and outside ring.
3. the preparation method of whole Zhang Huazhu bundle veneer according to claim 1, it is characterized in that: in described step 2, the bundle fiber of the even specification that makes is to process through reducing along bamboo stalk fiber direction Strength retention, fiber transverse strength, the while or additional through the heteroproteose cell Transformatin.
4. the preparation method of whole Zhang Huazhu bundle veneer according to claim 1 is characterized in that: be sewing line or laid tree lace on the bundle fiber unit in described step 3; The track of this sewing line or laid tree lace is the parallel straight line in some rows interval; Or being one or more parallel continuous zigzag folding line, zigzag trajectory and axis, bundle fiber unit angle a are 30 °-150 °; Also or be continuous S type curve that one or more is parallel.
5. the preparation method of whole Zhang Huazhu bundle veneer according to claim 1 is characterized in that: in described step 4, adjacent layer termination place distance is not less than 90mm.
6. the preparation method of an overlength bamboo bundle laminated veneer lumber is characterized in that method step is as follows:
1) restraint veneer stack assembly with one group by the prepared whole Zhang Huazhu of claim 1;
2) assembly is pressed into original depth in advance by being sent into by the roller loading bay in cold press;
3) continue to be fed into again intermittently hot pressing of hot press, obtain the overlength bamboo bundle laminated veneer lumber plate of final thickness.
7. the preparation method of an overlength bamboo bundle laminated veneer lumber is characterized in that method step is as follows:
1) form a unit base with some by the stack of the prepared whole Zhang Huazhu bundle veneer of claim 1 respectively, then with one group of continuous assembly of unit base;
2) assembly is pressed into original depth in advance by being sent into by the roller loading bay in cold press;
3) continue to be fed into again intermittently hot pressing of hot press, obtain the overlength bamboo bundle laminated veneer lumber plate of final thickness.
8. the preparation method of according to claim 6 or 7 described overlength bamboo bundle laminated veneer lumbers, is characterized in that: again through cutting operation to the length of standard.
9. the preparation method of according to claim 6 or 7 described overlength bamboo bundle laminated veneer lumbers, it is characterized in that: when hot press hot pressing, if the adhesive that uses is phenolic resins, hot pressing time is 0.5-2min/mm, hot pressing temperature is 120-180 ℃, and hot pressing pressure is 0.5-9MPa; If adhesive is isocyanates, hot pressing time is 0.5-1.2min/mm, and hot pressing temperature is 80-130 ℃, and hot pressing pressure is 0.5-9MPa.
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