CN110587740A - Preparation method of continuous uniform strip-shaped thin bamboo skin - Google Patents
Preparation method of continuous uniform strip-shaped thin bamboo skin Download PDFInfo
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- CN110587740A CN110587740A CN201910975975.9A CN201910975975A CN110587740A CN 110587740 A CN110587740 A CN 110587740A CN 201910975975 A CN201910975975 A CN 201910975975A CN 110587740 A CN110587740 A CN 110587740A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27J—MECHANICAL WORKING OF CANE, CORK, OR SIMILAR MATERIALS
- B27J1/00—Mechanical working of cane or the like
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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
- B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
- B27M3/0013—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles
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Abstract
The invention provides a method for preparing a continuous uniform strip-shaped thin bamboo strip, which comprises the following steps: firstly, preparing bamboo strips with smooth two surfaces, then sending the bamboo strips into a bamboo strip splitting device for splitting bamboo strips to obtain bamboo strip sheets, continuously lengthening the obtained bamboo strip sheets through lap joint gluing, then compressing the bamboo strip sheets at the lap joint gluing position, thinning the lap joint glued bamboo strip sheets after glue solution at the lap joint gluing position is dried to enable the thickness of the lap joint glued bamboo strip sheets to be the same as that of the bamboo strip sheets, and finally obtaining the strip-shaped thin bamboo strips with uniform and continuous thickness. According to the invention, the thickness, the length and the width of the prepared bamboo skin are controllable by adopting the bamboo skin preparation process, the novel split bamboo skin feed process and the extension process, the continuous gluing and lapping are carried out on the sheet bamboo skins to prepare the continuous infinite-length uniform strip-shaped material, and the prepared bamboo skin sheets have the advantages of smooth surfaces, good flexibility, good quality stability and uniformity and high production efficiency.
Description
Technical Field
The invention belongs to the technical field of bamboo and wood processing, and particularly relates to a preparation method of a continuous uniform strip-shaped thin bamboo strip.
Background
The bamboo timber is different with timber structure, has unique longitudinal arrangement structure, does not have horizontal wooden ray structure, and the unit that utilizes the bamboo timber to process is vertical strip unit, if: the bamboo strips can be used for manufacturing composite materials such as bamboo strip plywood, bamboo strip winding pipelines, bamboo strip decorative strips and the like, and the bamboo strips are mainly used for manufacturing bamboo woven materials.
With the development of scientific and technological technology, people have higher and higher performance requirements on composite materials, the development of bamboo processing technology is subjected to bottleneck, the existing bamboo skin is influenced by industrial bamboo splitting equipment and the structure of bamboo, the thickness of the produced bamboo skin is generally larger than 1mm, the flexibility is poor, and the application performance of the bamboo skin in the aspect of manufacturing high-performance composite materials is limited; the width of the thin bamboo strips is generally less than 1.5mm, the quality uniformity and the continuity are poor, and the problem of low manual production efficiency exists.
Continuous uniform ribbon materials are intermediate materials in the manufacture of high performance composite materials (such as automotive parts and construction profile housings, sporting equipment and packaging crash cushion housings, electrical products and storage housings) and are required to have the advantages of flat surfaces, small dimensional deviation of width and thickness, and the like. The bamboo skin materials produced in the prior art are thick and uneven in strength, most of the bamboo skin materials are used for manufacturing low-end artificial board products with low added values, technical support cannot be provided for manufacturing high-performance composite materials, the bamboo skin materials are directly used as intermediate materials, the bamboo skin sheets are poor in toughness, the bamboo skin sheets cannot be woven into sheet materials with various specifications, wound into small-diameter-grade pipes and the like, and the bamboo skin sheets cannot be used for manufacturing laminated materials with good impact resistance or light-weight high-strength reinforcing and insulating materials.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for preparing a continuous uniform strip-shaped thin bamboo strip aiming at the defects of the prior art, and the bamboo strip obtained by the preparation method has the advantages of smooth surface, small deviation of width and thickness dimensions and good flexibility.
In order to solve the technical problems, the invention adopts the technical scheme that: a method for preparing a continuous uniform strip-shaped thin bamboo strip uses 1-3 years of fresh mao bamboo, 4-5 years of fresh mao bamboo or dry bamboo as raw materials, firstly subdivides the bamboo to obtain bamboo strips with different widths, then uses a knot removing machine to plane the inner and outer knots until the two surfaces are smooth, then uses a strip subdividing machine to prepare a thin bamboo strip sheet, uses a continuous lap-joint gluing mode to prepare the strip-shaped thin bamboo strip from the thin bamboo strip sheet after air-drying and ageing, and finally polishes the lap-joint gluing position to ensure that the thickness of the strip-shaped thin bamboo strip and the original thin bamboo strip sheet is uniform and stable; the method specifically comprises the following steps:
s1, selecting different bamboo woods, preprocessing, splitting to obtain bamboo strips with the water content of 10% -60%, and planing the inner sections and the outer sections of the bamboo strips by using a nodulizer until the two surfaces are flat; the bamboo strips with smooth two surfaces have the length of 100 mm-20000 mm and the width of 1 mm-150 mm;
s2, feeding the bamboo strips in the S1 into a bamboo strip splitting device for bamboo strip splitting to obtain bamboo strip pieces, wherein the length of each bamboo strip piece is 100-20000 mm, the width of each bamboo strip piece is more than 1-150 mm, and the thickness of each bamboo strip piece is 0.01-2 mm; the included angle between the upper inclined plane of the slicing cutter of the thin bamboo strip splitting equipment and the horizontal plane is 1-17 degrees, and the included angle between the knife edge of the slicing cutter and the feeding direction of the bamboo strips is 15-60 degrees; the uniformity of the bamboo splits can be improved by adjusting the included angle between the upper inclined plane of the slicing cutter and the horizontal plane, and the split bamboo splits or bamboo strips are prevented from damaging the tissue structure due to the action of friction force and influencing the continuous splitting or influencing the strength uniformity of the bamboo splits and the bamboo strips; the included angle between the knife edge of the slicing cutter and the feeding direction of the bamboo strips is adjusted, so that the knife edge can be used for cutting bamboo joint parts step by step, and the phenomenon that the knife edge is broken due to too fast feeding or bamboo splits are broken at the bamboo joint parts is avoided;
s3, carry out the continuity with the thin bamboo strips used for weaving piece that obtains in S2 through the overlap joint veneer and connect long, then compress tightly the thin bamboo strips used for weaving piece to the overlap joint veneer department, treat that the glue solution of overlap joint veneer department is dry after to carry out attenuate processing to the thin bamboo strips used for weaving piece of overlap joint veneer makes its thickness the same with the thickness of thin bamboo strips used for weaving piece, finally obtain the thin bamboo strips used for weaving of even, continuous banding of thickness, the length of the thin bamboo strips used for weaving piece of overlap joint veneer department is 5 ~ 100 times of thin bamboo strips used for weaving piece thickness.
The preparation method of the continuous uniform strip-shaped thin bamboo strip is characterized in that in S1, the bamboo material is fresh mao bamboo of 1-3 years old, fresh mao bamboo of 4-10 years old or dry mao bamboo of 4-10 years old; when 1-3 years of fresh moso bamboos are selected, the pretreatment process is airing and air drying treatment; when selecting fresh moso bamboo of 4-10 years, the pretreatment process comprises soaking, weak base softening treatment and drying treatment; when the dried moso bamboo is grown for 4-10 years, the pretreatment process is soaking treatment.
The preparation method of the continuous uniform strip-shaped thin bamboo strip is characterized in that the water content of the bamboo strip in S1 is 25% -35%.
The preparation method of the continuous uniform strip-shaped thin bamboo strip is characterized in that the glue solution adopted in the step of overlapping and gluing in the step S3 is hot melt glue, thermosetting glue or quick-drying glue; the hot melt adhesive, the thermosetting adhesive and the quick-drying adhesive are respectively the hot melt adhesive mainly comprising polyolefin adhesive, the thermosetting adhesive mainly comprising AB type epoxy adhesive and the quick-drying adhesive mainly comprising UV epoxy adhesive, when the hot melt adhesive mainly comprising polyolefin adhesive is used, one side of the thin bamboo strip is coated with the adhesive, the coating length is 10-100 times of the thickness of the thin bamboo strip, and then the bamboo strip which is not coated with the adhesive is immediately compressed and glued with the thin bamboo strip for length extension; when the thermosetting adhesive mainly containing AB type epoxy adhesive is used, one using mode is to compound AB and extend the bamboo strips according to a hot melt adhesive gluing mode, the gluing length between two thin bamboo strips is 10-100 times of the thickness, then the bamboo strips which are not glued are immediately compressed and glued with the thin bamboo strips to extend, and the other using mode is to paint epoxy matrix A type adhesive on one side of the thin bamboo strips and paint epoxy curing agent B type adhesive on the other side of the thin bamboo strips, and then the thin bamboo strips and the epoxy curing agent B type adhesive are spliced, compressed and cured to achieve the purpose of extension; when the quick-drying adhesive mainly comprising the UV epoxy adhesive is used, the UV adhesive is uniformly coated between thin bamboo splits needing to be lengthened, and then the UV adhesive is irradiated and cured by ultraviolet rays.
The preparation method of the continuous uniform strip-shaped thin bamboo strip is characterized in that the thinning treatment mode S3 comprises polishing, uniform sand blasting of a sand blasting machine, uniform wire drawing, cutting of a planer tool, thicknessing of a thicknessing machine or a hot pressing/cold pressing thickness setting process.
The preparation method of the continuous uniform strip-shaped thin bamboo strip is characterized in that the feeding speed of the bamboo strip when the thin bamboo strip is cut in S2 is 2-8 m/min; the pressure acting on the bamboo strips between the upper feeding roller and the lower feeding roller of the bamboo strip splitting equipment is 50N-300N when the bamboo strips are split, and the pressure acting on the bamboo strips between the upper feeding roller and the lower feeding roller of the bamboo strip splitting equipment is adjusted from high to low when the bamboo strips are split, so that the pressure of the feeding rollers reaches the most appropriate feeding friction force with the bamboo strips in the splitting process, and the phenomenon that the bamboo strips are crushed from the outer skin of the bamboo to the inner skin of the bamboo due to the reduction of density and hardness in the splitting process is prevented; the influence of the feeding speed of the bamboo strips on the splitting uniformity is large, but the bamboo strips become soft along with the increase of the number of the splitting layers, and the feeding speed can be properly increased according to the number of the splitting layers in actual operation so as to improve the splitting efficiency.
The continuous uniform strip-shaped thin bamboo strip manufacturing method is characterized in that the pressure acting on the bamboo strips between the upper feeding roller and the lower feeding roller of the bamboo strip splitting equipment when the green side of the bamboo strips is split is greater than the pressure acting on the bamboo strips between the upper feeding roller and the lower feeding roller of the bamboo strip splitting equipment when the yellow side of the bamboo strips is split, the green side of the bamboo strips is split, the thickness is large, the pressure of a compression roller borne by a material is large, the feeding and discharging are uniform, but along with the increase of the number of the split bamboo strip layers, a cutter and a compression roller are also gradually close to the yellow side which is small in density and easy to cut, the borne pressure limit of the bamboo strips is also gradually reduced, otherwise, the crushing condition occurs, and the pressure of the compression roller is gradually reduced.
The preparation method of the continuous uniform strip-shaped thin bamboo strip is characterized in that the variation coefficients of the length, the width, the thickness, the density and the strength of the thin bamboo strip in S2 are not more than 15%; the variation coefficient of the bamboo specified in the forestry system is controlled to be 15 percent, which is reasonable; the coefficient of variation is the error range/average.
Furthermore, the overlapping length of the overlapping gluing part is 10-100 times of the thickness of the thin bamboo skin, the overlapping thickness of the overlapping gluing part is 0.01-10mm, the thickness of the overlapping gluing part needs to be the same as that of the initially prepared bamboo skin, so that the quality uniformity of the prepared continuous uniform strip-shaped thin bamboo skin is ensured, and the strength of the overlapping gluing part is greater than or equal to the average strength of the bamboo joints.
The above method for producing a continuous uniform strip-shaped thin bamboo strip is characterized in that in S2, the feeding mode of the slicing tool of the thin bamboo strip splitting device includes circular arc horizontal swing feeding represented by a crank-rocker mechanism or single-side tool face swing feeding, sine/cosine tool up-and-down fluctuation cutting feeding represented by simple coordinated motion or tool face left-and-right fluctuation cutting feeding represented by simple coordinated motion, up-and-down lattice cutting feeding represented by an eccentric wheel, front-and-back dot vibration cutting feeding or left-and-right lattice cutting feeding.
Because the density, strength and modulus of the bamboo green to the bamboo yellow are obviously reduced, and the physical and mechanical properties of the prepared strip-shaped thin bamboo strip are also influenced, the properties of the strip-shaped thin bamboo strip at different positions (bamboo green, bamboo flesh and bamboo yellow) prepared by the method are as follows: the density of the strip-shaped thin bamboo skin from tabasheer skin to bamboo skin is from 0.4g/cm3To 1.3g/cm3The strength of the bamboo joints of the strip bamboo skin is 5MPa to 50MPa, and the strength of the bamboo joints is 50MPa to 450 MPa.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, through optimization of the preparation process of the thin bamboo strip sheet (thin bamboo strip), the movement process and the lengthening process of the cutter are coordinated and controlled, so that the strip-shaped thin bamboo strip with different lengths, thicknesses and widths, continuous thickness and uniform thickness is prepared, and the controllability of the high-performance thin bamboo strip material is realized. Meanwhile, the invention carries out the transformation of a cutter feeding mode on the existing thin bamboo strip cutting equipment, and the novel thin bamboo strip cutting feed process controls the uniformity of thin bamboo strips by adjusting the feeding direction and the feeding mode of a cutting cutter and the pressure and the speed of a feed roller; the thickness of the thin bamboo strips is changed by controlling the inclination angle and the upper and lower positions of the knife edge, and the prepared thin bamboo strips are smoother in surface and more uniform in overall thickness.
2. According to the invention, the bonding length between the thin bamboo strips is controlled, and the mechanical property of the thin bamboo strips is controlled to be stable, so that the thin bamboo strips with good flexibility can be prepared, and the thin bamboo strips can be applied to intermediate materials of high-performance composite materials.
3. According to the invention, the lap joint distance is calculated for gluing by calculating the tensile strength of the thin bamboo splits and the shear strength between lap joints of the thin bamboo splits, so that the prepared strip-shaped thin bamboo splits are stable in strength and thickness.
4. The thin bamboo splits prepared by the invention not only have stable quality, but also have good tensile property and flexibility, can be applied to the field of composite materials with high performance and high added value, can be woven into sheet materials with various specifications, wound into small-diameter-grade pipes and the like, is used for manufacturing laminated materials with good impact resistance or light-weight high-strength reinforced and insulating materials, has wide application prospect, and has important contribution to enriching the application of bamboo materials.
The present invention will be described in further detail with reference to examples.
Drawings
Fig. 1 is a schematic structural view of an included angle α between an upper inclined surface of a slicing tool of the thin bamboo strip splitting apparatus and a horizontal plane.
Fig. 2 is a structural schematic diagram of the knife edge of the slicing knife of the thin bamboo strip splitting device and the feeding direction beta of the bamboo strips.
Detailed Description
Example 1
The preparation method of the continuous uniform strip-shaped thin bamboo strip comprises the following steps:
s1, selecting 1-3 years old fresh moso bamboos, airing and air-drying for 2-3 days, and then splitting to obtain bamboo strips with the water content of 25% -35%, wherein the bamboo strips are 10000-20000 mm long and 10mm wide; then, planing the inner and outer sections by using a nodulizer until the two surfaces are flat;
s2, feeding the bamboo strips in the step S1 into a bamboo strip splitting device for splitting bamboo strips, wherein the split bamboo strips are from the tabasheer side to the main green side to obtain bamboo strip pieces, and the bamboo strip pieces are 10000-20000 mm in length, 10mm in width and 0.1mm in thickness; an included angle between the upper inclined plane of the slicing cutter of the thin bamboo strip splitting equipment and the horizontal plane is 9 degrees (as shown in figure 1), and an included angle between the knife edge of the slicing cutter and the feeding direction of the bamboo strips is 30 degrees (as shown in figure 2);
when the thin bamboo strips are cut, the feeding speed of the bamboo strips is controlled between 2m/min and 8m/min, and the speed is firstly small and then large, because the bamboo strips become soft along with the increase of the number of the layers of the cut thin bamboo strips, the friction force between a slicing cutter and the bamboo strips can be reduced as much as possible by improving the speed as much as possible, the uniformity of the thin bamboo strip pieces is ensured, and the thin bamboo strip cutting efficiency can also be improved;
when the thin bamboo strips are sliced, the pressure acting on the thin bamboo strips between an upper feeding roller and a lower feeding roller of the thin bamboo strip splitting equipment is controlled to be between 50N and 300N, when the slicing is started from the tabasheer side, the size, the continuous state and the like of the obtained thin bamboo strips are unstable, the thin bamboo strips can be sliced uniformly, continuously and stably after multiple layers are sliced, the number of the sliced layers is calculated, and when 1 to 7 continuous and uniform thin bamboo strips are sliced, the pressure acting on the bamboo strips between the upper feeding roller and the lower feeding roller is adjusted to be 220N; when 7-13 layers of continuous and uniform bamboo splits are planed, adjusting the pressure acting on the bamboo strips between the upper feeding roller and the lower feeding roller to 180N; the strength of the bamboo splits obtained by planing more than 13 layers cannot meet the application requirement, so that the bamboo splits planed more than 13 layers are discarded and are not used for gluing and lengthening in S3; through a large number of experiments, the following results are found: in order to ensure the stable tensile strength of the continuous strip bamboo skin, the thickness of the bamboo skin is planed below 0.5mm, and excessive planing layers are not needed; the actual production is maximum of 17 layers of planing, but the last two layers have lower strength; the thickness of the bamboo splits is planed to be more than 0.5mm, the structural hardness of the bamboo splits is reduced and tends to be stable due to the reduction of the bamboo yellow fibers, the planing layer number can be increased to some extent, but the strength is obviously reduced;
s3, air-drying and ageing the bamboo skin sheets obtained in the S2 for 6-12 hours, continuously lengthening the bamboo skin sheets through lap gluing by hot melt adhesive, then compressing the bamboo skin sheets at the lap gluing position, drying glue solution at the lap gluing position, and then thinning the lap glued bamboo skin sheets to enable the thickness of the lap glued bamboo skin sheets to be the same as that of the bamboo skin sheets, finally obtaining strip-shaped thin bamboo skins with uniform and continuous thickness, wherein the length of the lap glued bamboo skin sheets is 20 times of the thickness of the bamboo skin sheets; the hot melt adhesive is mainly made of polyolefin adhesive. The gluing process is as follows: gluing one side of the thin bamboo strip, and immediately pressing, gluing and lengthening the non-glued thin bamboo strip; the thinning treatment mode is that line 2000-mesh sand paper is adopted for polishing.
In this embodiment, the feeding mode of the slicing tool of the thin bamboo strip splitting device in S2 is arc-shaped horizontal swinging loading feeding represented by a crank-rocker mechanism; the variation coefficients of the length, the width, the thickness, the density and the strength of the sliced bamboo splits do not exceed 15 percent. Meanwhile, the feeding mode of the slicing tool of the thin bamboo strip splitting equipment in the S2 may also adopt a single-side tool face swing feeding represented by a crank-rocker mechanism, a sine/cosine tool up-and-down fluctuation cutting feeding represented by a simple motion or a tool face left-and-right fluctuation cutting feeding represented by a simple motion, an up-and-down lattice cutting feeding represented by an eccentric wheel, a front-and-back point vibration cutting feeding or a left-and-right lattice cutting feeding, or any one of the above cutting feeding modes.
In the embodiment, the width of the thin bamboo strip obtained in step S2 is 10mm, the thickness is 0.1mm, the average tensile strength is 330MPa, the joint strength of 1-5 layers, 6-10 layers and 11-13 layers is 45 ± 7MPa, 33 ± 4MPa and 15 ± 2MPa respectively, and the strength between 1-5 layers, 6-10 layers and 11-13 layers is 400 ± 45MPa, 275 ± 32MPa and 155 ± 22MPa respectively; the length of this embodiment preparation banded thin bamboo strips used for weaving can carry out the overlap joint as required, can obtain the banded thin bamboo strips used for weaving of unlimited length, and the tensile strength of the overlap joint of banded thin bamboo strips used for weaving is 8MPa, and banded thin bamboo strips used for weaving is continuous, no fracture production, and surfacing, and the size is even.
Example 2
The preparation method of the continuous uniform strip-shaped thin bamboo strip comprises the following steps:
s1, selecting 4-10 years old fresh moso bamboos, soaking, softening with weak base, drying, and splitting to obtain bamboo strips with the water content of 30-60%, wherein the length of the bamboo strips is 1000-20000 mm, and the width of the bamboo strips is 80 mm; then, planing the inner and outer sections by using a nodulizer until the two surfaces are flat;
s2, feeding the bamboo strips in the S1 into a bamboo strip splitting device for bamboo strip splitting to obtain bamboo strip pieces, wherein the length of each bamboo strip piece is 1000-20000 mm, the width of each bamboo strip piece is 80mm, and the thickness of each bamboo strip piece is 2 mm; the included angle between the upper inclined plane of the slicing cutter of the thin bamboo strip splitting equipment and the horizontal plane is 17 degrees, and the included angle between the knife edge of the slicing cutter and the feeding direction of the bamboo strips is 60 degrees;
when the thin bamboo strips are cut, the feeding speed of the bamboo strips is controlled between 2m/min and 8m/min, and the speed is firstly small and then large, because the bamboo strips become soft along with the increase of the number of the layers of the cut thin bamboo strips, the friction force between a slicing cutter and the bamboo strips can be reduced as much as possible by improving the speed as much as possible, the uniformity of the thin bamboo strip pieces is ensured, and the thin bamboo strip cutting efficiency can also be improved;
when the thin bamboo strips are sliced, the pressure acting on the thin bamboo strips between an upper feeding roller and a lower feeding roller of the thin bamboo strip splitting equipment is controlled to be between 50N and 300N, when the slicing is started from the tabasheer side, the size, the continuous state and the like of the obtained thin bamboo strips are unstable, the thin bamboo strips can be sliced uniformly, continuously and stably after the multiple layers are sliced, the number of the sliced layers is calculated, and when 1-5 continuous and uniform thin bamboo strips are sliced, the pressure acting on the bamboo strips between the upper feeding roller and the lower feeding roller is adjusted to be 180N; when 6-10 layers of continuous and uniform bamboo skin slices are planed, adjusting the pressure acting on the bamboo strips between the upper feeding roller and the lower feeding roller to 80N; the strength of the bamboo splits obtained by planing more than 10 layers cannot meet the application requirement, so that the bamboo splits planed more than 10 layers are discarded and are not used for gluing and lengthening in S3;
s3, air-drying and ageing the bamboo skin sheets obtained in the S2 for 6-12 hours, continuously lengthening the bamboo skin sheets through lapping gluing by using thermosetting glue, then pressing the bamboo skin sheets at the lapping gluing position, thinning the lapped and glued bamboo skin sheets after the glue solution at the lapping gluing position is dried to enable the thickness of the lapped and glued bamboo skin sheets to be the same as that of the bamboo skin sheets, and finally obtaining continuous strip-shaped thin bamboo skin sheets with uniform thickness, wherein the length of the lapped and glued bamboo skin sheets is 50 times of the thickness of the bamboo skin sheets; the thermosetting adhesive is mainly AB type epoxy adhesive; the thinning treatment mode is cutting by a planer tool.
In this embodiment, the feeding mode of the slicing tool of the thin bamboo strip splitting device in S2 is a single-side tool face swing feeding represented by a crank-rocker mechanism; the variation coefficients of the length, the width, the thickness, the density and the strength of the sliced bamboo splits do not exceed 15 percent. Meanwhile, in S2 of this embodiment, the feeding manner of the slicing tool of the thin bamboo strip splitting apparatus may also adopt an arc-shaped horizontal swinging loading represented by a crank-rocker mechanism to feed a sine/cosine tool represented by a simple motion in a vertical wave cutting manner or a tool face in a left-right wave cutting manner, an eccentric wheel represented in a vertical lattice cutting manner, a front-back point vibration type cutting manner, or a left-right lattice cutting manner, or any of the above cutting feeding manners.
In this embodiment, the variation coefficients of the length, the width, the thickness, the density, and the strength of the thin bamboo strip sliced in S2 are not more than 15%.
In the embodiment, the width of the thin bamboo strip obtained in step S2 is 80mm, the thickness is 2mm, the average tensile strength is 245MPa, the joint strength of 1-5 layers, 6-8 layers and 9-10 layers is 30 ± 4MPa, 16 ± 2MPa and 5 ± 1MPa respectively, and the interlaminar strength of 1-5 layers, 6-8 layers and 9-10 layers is 300 ± 45MPa, 210 ± 25MPa and 50 ± 7MPa respectively; the length that this embodiment prepared banded thin bamboo strips used for weaving piece can carry out the overlap joint as required, can obtain the banded thin bamboo strips used for weaving piece of unlimited length, and the tensile strength of the overlap joint of banded thin bamboo strips used for weaving piece is 15MPa, and banded thin bamboo strips used for weaving piece is continuous, no fracture production, and surfacing, and the size is even.
Example 3
The preparation method of the continuous uniform strip-shaped thin bamboo strip in the embodiment comprises the following steps:
s1, selecting 4-10-year-old dry mao bamboos to soak to obtain bamboo strips with the water content of 10% -25%, wherein the length of the bamboo strips is 100-20000 mm, and the width of the bamboo strips is 50 mm; then, planing the inner and outer sections by using a nodulizer until the two surfaces are flat;
s2, feeding the bamboo strips in the step S1 into a bamboo strip splitting device for bamboo strip splitting to obtain bamboo strip pieces, wherein the length of each bamboo strip piece is 100-10000 mm, the width of each bamboo strip piece is 50mm, and the thickness of each bamboo strip piece is 1 mm; the included angle between the upper inclined plane of the slicing cutter of the thin bamboo strip splitting equipment and the horizontal plane is 15 degrees, and the included angle between the knife edge of the slicing cutter and the feeding direction of the bamboo strips is 50 degrees;
when the thin bamboo strips are cut, the feeding speed of the bamboo strips is controlled between 2m/min and 8m/min, and the speed is firstly small and then large, because the bamboo strips become soft along with the increase of the number of the layers of the cut thin bamboo strips, the friction force between a slicing cutter and the bamboo strips can be reduced as much as possible by improving the speed as much as possible, the uniformity of the thin bamboo strip pieces is ensured, and the thin bamboo strip cutting efficiency can also be improved;
when the thin bamboo strips are sliced, the pressure acting on the thin bamboo strips between an upper feeding roller and a lower feeding roller of the thin bamboo strip splitting equipment is controlled to be between 50N and 300N, when the slicing is started from the tabasheer side, the size, the continuous state and the like of the obtained thin bamboo strips are unstable, the thin bamboo strips can be sliced uniformly, continuously and stably after multiple layers are sliced, the number of the sliced layers is calculated, and when 1-10 continuous and uniform thin bamboo strips are sliced, the pressure acting on the bamboo strips between the upper feeding roller and the lower feeding roller is adjusted to be 200N; when 11-15 layers of continuous and uniform bamboo skin slices are planed, adjusting the pressure acting on the bamboo strips between the upper feeding roller and the lower feeding roller to be 100N; the strength of the bamboo splits obtained by planing more than 15 layers cannot meet the application requirement, so that the bamboo splits planed more than 15 layers are discarded and are not used for gluing and lengthening in S3;
s3, air-drying and placing the bamboo skin pieces obtained in the S2 for 6-12 hours, continuously lengthening the bamboo skin pieces through lap gluing by using quick-drying glue, then pressing the bamboo skin pieces at the lap gluing position, drying glue liquid at the lap gluing position, and then thinning the lap glued bamboo skin pieces to enable the thickness of the lap glued bamboo skin pieces to be the same as that of the bamboo skin pieces, so that strip-shaped thin bamboo skin pieces with uniform and continuous thicknesses are finally obtained, wherein the length of the lap glued bamboo skin pieces is 5-100 times of the thickness of the bamboo skin pieces; the quick-drying adhesive is mainly UV epoxy adhesive; uniformly coating UV glue between thin bamboo skin sheets needing to be lengthened, and irradiating and curing by using ultraviolet rays, wherein the gluing length between the two thin bamboo skin sheets is 5 times of the thickness of the thin bamboo skin sheets; the thinning treatment mode is uniform sand blasting of a sand blasting machine.
In this embodiment, the feeding manner of the slicing tool of the thin bamboo strip splitting device in S2 is sine/cosine tool up-and-down fluctuating cutting feeding represented by simple motion, and meanwhile, circular arc horizontal swinging feeding or single-side tool face swinging feeding represented by a crank-rocker mechanism, or left-and-right fluctuating cutting feeding represented by simple motion or a tool face, or any one of up-and-down dot matrix cutting feeding, front-and-back dot vibration cutting feeding, or left-and-right dot matrix cutting feeding represented by an eccentric wheel may be adopted.
In this embodiment, the variation coefficients of the length, the width, the thickness, the density, and the strength of the thin bamboo strip sliced in S2 are not more than 15%.
In this embodiment, in step S2, the width of the thin bamboo strip obtained in the step S2 is 5mm, the thickness is 1mm, the average tensile strength is 293MPa, the joint strength of 1-7 layers and 8-15 layers is 35 ± 5MPa and 18 ± 2MPa respectively, and the interlaminar strength of 1-7 layers and 8-15 layers is 320 ± 45MPa and 220 ± 25MPa respectively; the length that this embodiment prepared banded thin bamboo strips used for weaving piece can carry out the overlap joint as required, can obtain the banded thin bamboo strips used for weaving piece of unlimited length, and the tensile strength of the overlap joint of banded thin bamboo strips used for weaving piece is 10MPa, and banded thin bamboo strips used for weaving piece is continuous, no fracture production, and surfacing, and the size is even.
Example 4
The preparation method of the continuous uniform strip-shaped thin bamboo strip in the embodiment comprises the following steps:
s1, selecting 1-3 years old fresh moso bamboo, drying in the sun and air, splitting to obtain bamboo strips with the water content of 30-60%, wherein the length of the bamboo strips is 100-1000 mm, the width of the bamboo strips is 5mm,
s2, feeding the bamboo strips in the step S1 into a bamboo strip splitting device for bamboo strip splitting to obtain bamboo strip pieces, wherein the length of each bamboo strip piece is 100-1000 mm, the width of each bamboo strip piece is 5mm, and the thickness of each bamboo strip piece is 0.1 mm; the included angle between the upper inclined plane of the slicing cutter of the thin bamboo strip splitting equipment and the horizontal plane is 1 degree, and the included angle between the knife edge of the slicing cutter and the feeding direction of the bamboo strips is 20 degrees;
when the thin bamboo strips are cut, the feeding speed of the bamboo strips is controlled between 2m/min and 8m/min, and the speed is firstly small and then large, because the bamboo strips become soft along with the increase of the number of the layers of the cut thin bamboo strips, the friction force between a slicing cutter and the bamboo strips can be reduced as much as possible by improving the speed as much as possible, the uniformity of the thin bamboo strip pieces is ensured, and the thin bamboo strip cutting efficiency can also be improved;
when the thin bamboo strips are sliced, the pressure acting on the bamboo strips between an upper feeding roller and a lower feeding roller of the thin bamboo strip slicing equipment is controlled to be 50N-300N, and after the thin bamboo strips are sliced uniformly, continuously and stably, when 1-7 layers of continuous and uniform thin bamboo strips are sliced, the pressure acting on the bamboo strips between the upper feeding roller and the lower feeding roller is adjusted to be 220N; when 7-13 layers of continuous and uniform bamboo splits are planed, the pressure acting on the bamboo strips between the upper feeding roller and the lower feeding roller is adjusted to 180N
When the thin bamboo strips are sliced, the pressure acting on the thin bamboo strips between an upper feeding roller and a lower feeding roller of the thin bamboo strip splitting equipment is controlled to be between 50N and 300N, when the slicing is started from the tabasheer side, the size, the continuous state and the like of the obtained thin bamboo strips are unstable, the thin bamboo strips can be sliced uniformly, continuously and stably after multiple layers are sliced, the number of the sliced layers is calculated, and when 1 to 7 continuous and uniform thin bamboo strips are sliced, the pressure acting on the bamboo strips between the upper feeding roller and the lower feeding roller is adjusted to be 220N; when 7-13 layers of continuous and uniform bamboo splits are planed, adjusting the pressure acting on the bamboo strips between the upper feeding roller and the lower feeding roller to 180N; the strength of the bamboo splits obtained by planing more than 13 layers cannot meet the application requirement, so that the bamboo splits planed more than 13 layers are discarded and are not used for gluing and lengthening in S3;
s3, air-drying and ageing the bamboo skin sheets obtained in the S2 for 6-12 hours, continuously lengthening the bamboo skin sheets through lapping gluing by using hot melt adhesive, then pressing the bamboo skin sheets at the lapping gluing position, drying glue solution at the lapping gluing position, and then thinning the lapped and glued bamboo skin sheets to enable the thickness of the lapped and glued bamboo skin sheets to be the same as that of the bamboo skin sheets, so that strip-shaped thin bamboo skin sheets with uniform and continuous thickness are finally obtained, wherein the length of the bamboo skin sheets at the lapping gluing position is 20 times of the thickness of the bamboo skin sheets; the hot melt adhesive is mainly made of polyolefin adhesive. The gluing process is as follows: gluing one side of the thin bamboo strip, and immediately pressing, gluing and lengthening the non-glued thin bamboo strip; the thinning treatment mode is uniform sand blasting of a sand blasting machine.
In this embodiment, the feeding manner of the slicing tool of the thin bamboo strip splitting device in S2 is the left-right wave cutting feeding of the tool face represented by the simple movement, and meanwhile, the feeding manner may also be any one of the up-down wave cutting feeding of the sine/cosine tool represented by the simple movement, the up-down dot matrix cutting feeding represented by the eccentric wheel, the front-back dot vibration cutting feeding, or the left-right dot matrix cutting feeding represented by the crank rocker mechanism, or the swing feeding of the single-side tool face.
In this embodiment, the variation coefficients of the length, the width, the thickness, the density, and the strength of the thin bamboo strip sliced in S2 are not more than 15%.
In the embodiment, the width of the thin bamboo strip obtained in step S2 is 10mm, the thickness is 0.1mm, the average tensile strength is 330MPa, the joint strength of 1-5 layers, 6-10 layers and 11-13 layers is 45 ± 7MPa, 33 ± 4MPa and 15 ± 2MPa respectively, and the strength between 1-5 layers, 6-10 layers and 11-13 layers is 400 ± 45MPa, 275 ± 25MPa and 155 ± 22MPa respectively; the length that this embodiment prepared banded thin bamboo strips used for weaving piece can carry out the overlap joint as required, can obtain the banded thin bamboo strips used for weaving piece of unlimited length, and the tensile strength of the overlap joint of banded thin bamboo strips used for weaving piece is 8MPa, and banded thin bamboo strips used for weaving piece is continuous, no fracture production, and surfacing, and the size is even.
Example 5
The preparation method of the continuous uniform strip-shaped thin bamboo strip in the embodiment comprises the following steps:
s1, selecting 4-10 years old fresh moso bamboos, soaking, softening with weak base, drying, splitting to obtain bamboo strips with the water content of 25% -35%, wherein the length of the bamboo strips is 100-20000 mm, the width of the bamboo strips is 0.5mm, and then planing the inner and outer joints with a nodulizer until the two surfaces are flat;
s2, feeding the bamboo strips in the S1 into a bamboo strip splitting device for bamboo strip splitting to obtain bamboo strip pieces, wherein the length of each bamboo strip piece is 100-20000 mm, the width of each bamboo strip piece is 4mm, and the thickness of each bamboo strip piece is 0.05 mm; the included angle between the upper inclined plane of the slicing cutter of the thin bamboo strip splitting equipment and the horizontal plane is 5 degrees, and the included angle between the knife edge of the slicing cutter and the feeding direction of the bamboo strips is 15 degrees;
when the thin bamboo strips are cut, the feeding speed of the bamboo strips is controlled between 2m/min and 8m/min, and the speed is firstly small and then large, because the bamboo strips become soft along with the increase of the number of the layers of the cut thin bamboo strips, the friction force between a slicing cutter and the bamboo strips can be reduced as much as possible by improving the speed as much as possible, the uniformity of the thin bamboo strip pieces is ensured, and the thin bamboo strip cutting efficiency can also be improved;
when the thin bamboo strips are sliced, the pressure acting on the thin bamboo strips between an upper feeding roller and a lower feeding roller of the thin bamboo strip splitting equipment is controlled to be between 50N and 300N, when the slicing is started from the tabasheer side, the size, the continuous state and the like of the obtained thin bamboo strips are unstable, the thin bamboo strips can be sliced uniformly, continuously and stably after multiple layers are sliced, the number of the sliced layers is calculated, and when 1 to 12 continuous and uniform thin bamboo strips are sliced, the pressure acting on the bamboo strips between the upper feeding roller and the lower feeding roller is adjusted to be 180N; the strength of the bamboo splits obtained by planing more than 12 layers cannot meet the application requirement, so that the bamboo splits planed more than 12 layers are discarded and are not used for gluing and lengthening in S3;
when the thin bamboo strips are cut, the pressure acting on the bamboo strips between an upper feeding roller and a lower feeding roller of the thin bamboo strip cutting equipment is controlled to be between 50N and 300N, and after the thin bamboo strips are cut uniformly, continuously and stably, when 1 to 12 layers of continuous and uniform thin bamboo strips are planed, the pressure acting on the bamboo strips between the upper feeding roller and the lower feeding roller is adjusted to be 180N;
s3, air-drying and ageing the bamboo skin sheets obtained in the S2 for 6-12 hours, continuously lengthening the bamboo skin sheets through lapping gluing by using thermosetting glue, then pressing the bamboo skin sheets at the lapping gluing position, thinning the lapped and glued bamboo skin sheets after the glue solution at the lapping gluing position is dried to enable the thickness of the lapped and glued bamboo skin sheets to be the same as that of the bamboo skin sheets, and finally obtaining continuous strip-shaped thin bamboo skin sheets with uniform thickness, wherein the length of the lapped and glued bamboo skin sheets is 100 times of that of the bamboo skin sheets; the thermosetting adhesive is mainly AB type epoxy adhesive; the thinning treatment mode respectively comprises the processes of polishing, uniformly sand blasting by a sand blasting machine, uniformly wire drawing, cutting by a planer tool, thicknessing by a thicknessing machine or hot pressing/cold pressing for thickness setting;
in this embodiment, the feeding manner of the slicing tool of the thin bamboo strip splitting device in S2 is vertical lattice cutting feeding represented by an eccentric wheel, and meanwhile, circular arc horizontal swing feeding or single-side tool face swing feeding represented by a crank-rocker mechanism, sine/cosine tool vertical fluctuation cutting feeding represented by simple motion or tool face left-right fluctuation cutting feeding represented by simple motion, or any one of front-back lattice cutting feeding or left-right lattice cutting feeding represented by an eccentric wheel may be adopted.
In this embodiment, the variation coefficients of the length, the width, the thickness, the density, and the strength of the thin bamboo strip sliced in S2 are not more than 15%.
In the embodiment, the width of the bamboo split obtained in the step S2 is 4mm, the thickness is 0.05mm, the average tensile strength is 410MPa, the joint strength of 1-6 layers, 7-11 layers and 11-12 layers is 50 ± 7MPa, 43 ± 5MPa and 20 ± 3MPa respectively, and the strength between 1-6 layers, 7-11 layers and 11-12 layers is 450 ± 45MPa, 350 ± 25MPa and 200 ± 25MPa respectively; the length that this embodiment prepared banded thin bamboo strips used for weaving piece can carry out the overlap joint as required, can obtain the banded thin bamboo strips used for weaving piece of unlimited length, and the tensile strength of the overlap joint of banded thin bamboo strips used for weaving piece is 15MPa, and banded thin bamboo strips used for weaving piece is continuous, no fracture production, and surfacing, and the size is even.
Example 6
The preparation method of the continuous uniform strip-shaped thin bamboo strip in the embodiment comprises the following steps:
s1, selecting 4-10-year-old dry mao bamboos, soaking, then splitting to obtain bamboo strips with the water content of 25% -35%, wherein the length of the bamboo strips is 1000-5000 mm, the width of the bamboo strips is 3mm, and then planing the inner and outer joints with a joint machine until the two surfaces are flat;
s2, feeding the bamboo strips in the step S1 into a bamboo strip splitting device for bamboo strip splitting to obtain bamboo strip pieces, wherein the length of each bamboo strip piece is 1000-5000 mm, the width of each bamboo strip piece is 3mm, and the thickness of each bamboo strip piece is 0.5 mm; the included angle between the upper inclined plane of the slicing cutter of the thin bamboo strip splitting equipment and the horizontal plane is 10 degrees, and the included angle between the knife edge of the slicing cutter and the feeding direction of the bamboo strips is 15 degrees;
when the thin bamboo strips are cut, the feeding speed of the bamboo strips is controlled between 2m/min and 8m/min, and the speed is firstly small and then large, because the bamboo strips become soft along with the increase of the number of the layers of the cut thin bamboo strips, the friction force between a slicing cutter and the bamboo strips can be reduced as much as possible by improving the speed as much as possible, the uniformity of the thin bamboo strip pieces is ensured, and the thin bamboo strip cutting efficiency can also be improved;
when the thin bamboo strips are sliced, the pressure acting on the thin bamboo strips between an upper feeding roller and a lower feeding roller of the thin bamboo strip splitting equipment is controlled to be between 50N and 300N, when the slicing is started from the tabasheer side, the size, the continuous state and the like of the obtained thin bamboo strips are unstable, the thin bamboo strips can be sliced uniformly, continuously and stably after the multiple layers are sliced, the number of the sliced layers is calculated, and when 1 to 8 continuous and uniform thin bamboo strips are sliced, the pressure acting on the bamboo strips between the upper feeding roller and the lower feeding roller is adjusted to 210N; when 9-12 layers of continuous and uniform bamboo skin slices are planed, adjusting the pressure acting on the bamboo strips between the upper feeding roller and the lower feeding roller to 150N; the strength of the bamboo splits obtained by planing more than 12 layers cannot meet the application requirement, so that the bamboo splits planed more than 12 layers are discarded and are not used for gluing and lengthening in S3;
s3, air-drying and ageing the bamboo skin sheets obtained in the S2 for 6-12 hours, continuously lengthening the bamboo skin sheets through lap-joint gluing by using quick-drying glue, then pressing the bamboo skin sheets at the lap-joint gluing position, drying glue liquid at the lap-joint gluing position, thinning the lap-joint glued bamboo skin sheets to enable the thickness of the lap-joint glued bamboo skin sheets to be the same as that of the bamboo skin sheets, and finally obtaining continuous strip-shaped thin bamboo skin sheets with uniform thickness, wherein the length of the lap-joint glued bamboo skin sheets is 20 times of the thickness of the bamboo skin sheets; the quick-drying adhesive is mainly UV epoxy adhesive; uniformly coating UV glue between thin bamboo strips to be lengthened, irradiating and curing by ultraviolet rays,
in this embodiment, the feeding manner of the slicing tool of the thin bamboo strip splitting device in S2 is front-back dot oscillation type cutting feeding represented by an eccentric wheel, and meanwhile, circular arc horizontal swing feeding or single-side tool face swing feeding represented by a crank-rocker mechanism, sine/cosine tool up-and-down fluctuation cutting feeding represented by simple coordinated motion or tool face left-and-right fluctuation cutting feeding represented by simple coordinated motion, or any one of up-and-down dot matrix cutting feeding or left-and-right dot matrix cutting feeding represented by an eccentric wheel may be adopted.
The thinning treatment mode respectively comprises the processes of polishing, uniformly sand blasting by a sand blasting machine, uniformly wire drawing, cutting by a planer tool, thicknessing by a thicknessing machine or hot pressing/cold pressing for thickness setting;
in this embodiment, the variation coefficients of the length, the width, the thickness, the density, and the strength of the thin bamboo strip sliced in S2 are not more than 15%.
In the embodiment, in the step S2, the width of the obtained thin bamboo strip is 3mm, the thickness is 0.5mm, the average tensile strength is 300MPa, the joint strengths of 1 to 6 layers, 7 to 10 layers and 11 to 12 layers are respectively 40 ± 6MPa, 23 ± 3MPa and 10 ± 1MPa, and the inter-bamboo strengths of 1 to 5 layers, 6 to 10 layers and 11 to 12 layers are respectively 350 ± 45MPa and 250 ± 25 MPa; the length that this embodiment prepared banded thin bamboo strips used for weaving piece can carry out the overlap joint as required, can obtain the banded thin bamboo strips used for weaving piece of unlimited length, and the tensile strength of the overlap joint of banded thin bamboo strips used for weaving piece is 10MPa, and banded thin bamboo strips used for weaving piece is continuous, no fracture production, and surfacing, and the size is even.
Example 7
The preparation method of the continuous uniform strip-shaped thin bamboo strip in the embodiment comprises the following steps:
s1, selecting 1-3 years old fresh moso bamboos, drying in the air, then splitting to obtain bamboo strips with the water content of 25% -35%, wherein the length of the bamboo strips is 100-20000 mm, the width of the bamboo strips is 20mm, and then planing the inner and outer joints with a joint machine until the two surfaces are flat;
s2, feeding the bamboo strips in the S1 into a bamboo strip splitting device for bamboo strip splitting to obtain bamboo strip pieces, wherein the length of each bamboo strip piece is 100-20000 mm, the width of each bamboo strip piece is 20mm, and the thickness of each bamboo strip piece is 1 mm; the included angle between the upper inclined plane of the slicing cutter of the thin bamboo strip splitting equipment and the horizontal plane is 10 degrees, and the included angle between the knife edge of the slicing cutter and the feeding direction of the bamboo strips is 45 degrees;
when the thin bamboo strips are cut, the feeding speed of the bamboo strips is controlled between 2m/min and 8m/min, and the speed is firstly small and then large, because the bamboo strips become soft along with the increase of the number of the layers of the cut thin bamboo strips, the friction force between a slicing cutter and the bamboo strips can be reduced as much as possible by improving the speed as much as possible, the uniformity of the thin bamboo strip pieces is ensured, and the thin bamboo strip cutting efficiency can also be improved;
when the thin bamboo strips are sliced, the pressure acting on the thin bamboo strips between an upper feeding roller and a lower feeding roller of the thin bamboo strip splitting equipment is controlled to be between 50N and 300N, when the slicing is started from the tabasheer side, the size, the continuous state and the like of the obtained thin bamboo strips are unstable, the thin bamboo strips can be sliced uniformly, continuously and stably after multiple layers are sliced, the number of the sliced layers is calculated, and when 1-10 continuous and uniform thin bamboo strips are sliced, the pressure acting on the bamboo strips between the upper feeding roller and the lower feeding roller is adjusted to be 200N; when 11-15 layers of continuous and uniform bamboo skin slices are planed, adjusting the pressure acting on the bamboo strips between the upper feeding roller and the lower feeding roller to be 100N; the strength of the bamboo splits obtained by planing more than 15 layers cannot meet the application requirement, so that the bamboo splits planed more than 15 layers are discarded and are not used for gluing and lengthening in S3;
s3, continuously lengthening the bamboo skin sheet obtained in S2 by using hot melt adhesive mainly made of polyolefin adhesive through lapping and gluing, then compressing the bamboo skin sheet at the lapping and gluing position, thinning the lapping and gluing bamboo skin sheet after the glue solution at the lapping and gluing position is dried to enable the thickness of the lapping and gluing bamboo skin sheet to be the same as that of the bamboo skin sheet, and finally obtaining a continuous strip-shaped thin bamboo skin sheet with uniform thickness, wherein the length of the lapping and gluing bamboo skin sheet is 8 times of that of the bamboo skin sheet; the thinning treatment mode is sand paper grinding.
In this embodiment, the variation coefficients of the length, the width, the thickness, the density, and the strength of the thin bamboo strip sliced in S2 are not more than 15%.
In this embodiment, in step S2, the width of the thin bamboo strip obtained in the step S2 is 5mm, the thickness is 1mm, the average tensile strength is 293MPa, the joint strength of 1 to 7 layers and 8 to 15 layers is 35 ± 5MPa and 18 ± 2MPa, respectively, and the interlaminar strength of 1 to 7 layers and 8 to 15 layers is 320 ± 45MPa and 220 ± 25MPa, respectively.
The length that this embodiment prepared banded thin bamboo strips used for weaving piece can carry out the overlap joint as required, can obtain the banded thin bamboo strips used for weaving piece of unlimited length, and the tensile strength of the overlap joint of banded thin bamboo strips used for weaving piece is 8MPa, and banded thin bamboo strips used for weaving piece is continuous, no fracture production, and surfacing, and the size is even.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, change and equivalent changes of the above embodiments according to the technical essence of the invention are still within the protection scope of the technical solution of the invention.
Claims (10)
1. A method for preparing continuous uniform strip-shaped thin bamboo strips is characterized by comprising the following steps:
s1, selecting different bamboo woods, preprocessing, splitting to obtain bamboo strips with the water content of 10% -60%, and planing the inner sections and the outer sections of the bamboo strips by using a nodulizer until the two surfaces are flat; the bamboo strips with smooth two surfaces have the length of 100 mm-20000 mm and the width of 1 mm-150 mm;
s2, feeding the bamboo strips in the S1 into a bamboo strip splitting device for bamboo strip splitting to obtain bamboo strip pieces, wherein the length of each bamboo strip piece is 100-20000 mm, the width of each bamboo strip piece is 1-150 mm, and the thickness of each bamboo strip piece is 0.01-2 mm; the included angle between the upper inclined plane of the slicing cutter of the thin bamboo strip splitting equipment and the horizontal plane is 1-17 degrees, and the included angle between the knife edge of the slicing cutter and the feeding direction of the bamboo strips is 15-60 degrees;
s3, the thin bamboo strips obtained in the S2 are subjected to continuous lengthening through overlapping gluing, then the thin bamboo strips at the overlapping gluing position are compressed, and finally continuous strip-shaped thin bamboo strips are obtained, wherein the length of the thin bamboo strips at the overlapping gluing position is 5-100 times of the thickness of the thin bamboo strips.
2. The method for preparing the continuous uniform strip-shaped thin bamboo strip as claimed in claim 1, wherein the bamboo in S1 is fresh bamboo of 1-3 years old, fresh mao bamboo of 4-10 years old or dry mao bamboo of 4-10 years old; when 1-3 years of fresh moso bamboos are selected, the pretreatment process is airing and air drying treatment; when selecting fresh moso bamboo of 4-10 years, the pretreatment process comprises soaking, weak base softening treatment and drying treatment; when the dried moso bamboo is grown for 4-10 years, the pretreatment process is soaking treatment.
3. The method for manufacturing the continuous uniform strip-shaped thin bamboo strip as claimed in claim 1, wherein the adhesive solution at the overlapping and gluing part is dried, and then the overlapping and gluing thin bamboo strip is thinned to have the same thickness as the thin bamboo strip, so as to obtain the continuous strip-shaped thin bamboo strip with uniform thickness.
4. The method for manufacturing the continuous uniform strip-shaped thin bamboo strips as claimed in claim 1, wherein the glue solution adopted in the step of splicing and gluing in S3 is a hot melt glue, a thermosetting glue or a quick-drying glue.
5. The method for preparing the continuous uniform strip-shaped thin bamboo strip as claimed in claim 4, wherein the hot melt adhesive is a hot melt adhesive mainly composed of polyolefin adhesive; the thermosetting adhesive is mainly AB type epoxy adhesive; the quick-drying glue is mainly UV epoxy glue, 401 glue and 502 glue.
6. The method for manufacturing the continuous uniform strip-shaped thin bamboo strip as claimed in claim 3, wherein the thinning treatment in S3 includes sanding, uniform sand blasting by a sand blasting machine, uniform wire drawing, cutting by a planer tool, thicknessing by a thicknessing machine, or hot/cold pressing for thickness determination.
7. The method for preparing the continuous uniform strip-shaped thin bamboo strips as claimed in claim 1, wherein the feeding speed of the bamboo strips when the strips are split in S2 is 2m/min to 8 m/min; when the bamboo strips are cut, the pressure acting on the bamboo strips between an upper feeding roller and a lower feeding roller of the bamboo strip cutting equipment is 50N-300N.
8. The method for manufacturing the continuous uniform strip-shaped thin bamboo strips as claimed in claim 7, wherein the pressure acting on the bamboo strips between the upper feed roller and the lower feed roller of the bamboo strip splitting device when the green side of the bamboo strips is split is greater than the pressure acting on the bamboo strips between the upper feed roller and the lower feed roller of the bamboo strip splitting device when the yellow side of the bamboo strips is split.
9. The method for manufacturing the continuous uniform strip-shaped thin bamboo strip as claimed in claim 1, wherein the variation coefficients of the length, width, thickness, density and strength of the bamboo strip in S2 are not more than 25%.
10. The method according to claim 1, wherein the feeding manner of the slicing tool of the thin continuous uniform strip-shaped bamboo strip device in S2 includes circular arc horizontal swing feeding or single-side tool face swing feeding represented by a crank-rocker mechanism, sine/cosine tool up-and-down fluctuation cutting feeding or tool face left-and-right fluctuation cutting feeding represented by simple coordinated motion, up-and-down lattice cutting feeding represented by an eccentric wheel, front-and-back point vibration cutting feeding or left-and-right lattice cutting feeding.
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