CN115723217A - Processing method for manufacturing plywood by using bamboo sheets - Google Patents
Processing method for manufacturing plywood by using bamboo sheets Download PDFInfo
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- CN115723217A CN115723217A CN202211593800.XA CN202211593800A CN115723217A CN 115723217 A CN115723217 A CN 115723217A CN 202211593800 A CN202211593800 A CN 202211593800A CN 115723217 A CN115723217 A CN 115723217A
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- 235000017166 Bambusa arundinacea Nutrition 0.000 title claims abstract description 111
- 239000011425 bamboo Substances 0.000 title claims abstract description 111
- 235000017491 Bambusa tulda Nutrition 0.000 title claims abstract description 110
- 241001330002 Bambuseae Species 0.000 title claims abstract description 110
- 235000015334 Phyllostachys viridis Nutrition 0.000 title claims abstract description 110
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000003672 processing method Methods 0.000 title claims abstract description 10
- 239000011120 plywood Substances 0.000 title description 19
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 238000003801 milling Methods 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 67
- 239000000758 substrate Substances 0.000 claims description 24
- 239000003292 glue Substances 0.000 claims description 15
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 abstract description 8
- 238000004026 adhesive bonding Methods 0.000 abstract description 6
- 239000010410 layer Substances 0.000 description 67
- 239000002023 wood Substances 0.000 description 12
- 239000000047 product Substances 0.000 description 8
- 239000011265 semifinished product Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 244000271437 Bambusa arundinacea Species 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
The invention relates to a processing method for manufacturing a splint by a bamboo sheet, which comprises a multi-shaft multi-head woodworking milling machine, a conventional gluing machine and a conventional multilayer plane press, wherein the bamboo sheet raw material is processed by the multi-shaft multi-head woodworking milling machine, a plurality of trapezoidal grooves with camber angles and mutually concave-convex contraposition are uniformly and equidistantly processed on the upper surface and/or the lower surface of the bamboo sheet raw material, the traditional side pressing process is obtained by two processes of upper and lower trapezoidal groove paving and meshing and I-shaped plane paving, the multilayer plane press is directly used for mass production of the splint, the existing and general woodworking machinery equipment is used for processing, and the bamboo sheet of the finished splint can be manufactured at one time, so that the production efficiency is improved, and the production cost of the product is reduced.
Description
Technical Field
The invention relates to the technical field of producing splints used as structural materials, in particular to a processing method for manufacturing splints by bamboo sheets.
Background
The traditional wooden plywood is produced by processing solid cylindrical raw wood into thin wood chips with the thickness of 0.3mm to 2mm by rotary cutting, then coating glue on the layering single surface, and then placing the thin wood chips on a multi-layer plane press in a manner of criss-cross layer stacking to produce the universal plywood with the length of 2.4m, the width of 1.2m and the thickness of 3mm to 25 mm. Wherein: plates of three thicknesses of 3mm, 4mm and 5mm are generally used as surface decorative materials, and plates of 9mm to 25mm are generally used as structural materials.
In more than ten years, with the deepening of the concept of green environmental protection, the production of all-bamboo splints by bamboo sheets becomes a new trend of the decoration market. Specifically, the currently more common bamboo chip integrated material is prepared by processing 600-800 yuan/ton raw bamboo material into 1200-1500 yuan/ton bamboo chip material, gluing the side surface (width surface) of the bamboo chip, then using a side press to perform side press processing to prepare 5000-7000 yuan/cubic meter of semi-finished bamboo chip integrated material or square wood, and then performing secondary processing to prepare 2.4m long and 1.2m wide finished plywood. However, due to the low yield, the price is as high as 6000-8000 yuan/cubic meter, so that the bamboo plywood can only become a small market aiming at special preference. The reasons for restricting the development are:
1. the starting of the plywood industry made of bamboo materials is late, so that the bamboo plywood industry cannot be compared with the wood plywood industry which has been integrated for nearly one hundred years in the upstream matching industries such as mature process, materials, equipment and the like. The bamboo plywood finished product can be obtained by directly using the bamboo laminated wood of 5000-7000 yuan/cubic meter as a semi-finished product, performing secondary processing, sawing, sanding, leveling, gluing and laminating by using a plane press (as shown in figure 11).
2. And (4) restriction of equipment. The bamboo chips are subjected to side pressing after being subjected to side gluing by a customized special side pressing machine to be made into a semi-finished product type laminated wood, the hourly capacity of a single machine is only 0.45 cubic meter, and the daily capacity can only reach 3.6 cubic meters per day. The specific decomposition calculation is as follows: after 150-200 bamboo sheets with the length of 2.4 meters and the thickness of about 6-8 mm are glued on the end face with the width of 25mm and vertically placed, the bamboo sheets are tightly stacked on a side press workbench with the width of 1.2 meters, the meter is 0.075 cubic meter, the net heating time after pressing needs 5-8 minutes, the comprehensive time is about 10 minutes, namely, only 6 veneers can be produced by a single machine per hour, and the meter is 0.45 cubic meter.
3. The pressure of oil cylinders on two sides of the customized special side pressure press is more than 200 tons, the pressure is more than 100 tons by matching from top to bottom, and the overall energy consumption index after hot pressing is 30kw. Thus, the calculation from the customization cost and the energy consumption index of the equipment is almost the same as that of a common general-purpose multilayer plane press with 5 layers or more, and the productivity of the plane press is only a fraction of that of the plane press.
4. The bamboo chips are not fully formed by multi-layer flat pressing by existing wood working machinery, but are formed into bamboo chip laminated wood by side pressing with large equipment investment and low productivity, and then the laminated wood is used as a semi-finished product to be secondarily processed, so that the finished bamboo plywood is the fundamental reason for restricting market development due to small quantity and high price.
Thus, the prior art is in need of improvement and advancement.
Disclosure of Invention
The invention aims to overcome the defects of the existing technology for manufacturing bamboo splints by using a side pressing machine, and provides a method for manufacturing splints by using bamboo splints, which is processed by using the existing and universal wood-working mechanical equipment and can be used for manufacturing finished splints at one time, so that the aims of improving the production efficiency and reducing the production cost of products are fulfilled.
The purpose of the invention is realized by the following technical solution: a processing method for manufacturing a splint by bamboo sheets comprises the following steps: the multi-shaft multi-head woodworking milling machine, the conventional glue spreader and the conventional multilayer plane press are characterized in that the length of each bamboo chip raw material is 2.4m, the width is 25mm, and the thickness is 6-8 mm:
A. a multi-shaft multi-head woodworking milling machine with the processing breadth length of 2.4m and the center distance of 32mm is used for uniformly and equidistantly processing a plurality of trapezoidal grooves with camber angles, which are in concave-convex contraposition, on the upper surface and/or the lower surface of each bamboo chip raw material along the width direction of the bamboo chip raw material, and the sheets with the trapezoidal grooves on the upper surface and/or the lower surface at equal intervals are used as paving base materials;
B. conveying the paving base material to the next procedure for paving through a conveying mechanism, and coating the surface of the paving base material with glue through an end face glue coating machine in the conveying process;
C. when in pavement, a plurality of paving base materials coated with glue on the surfaces are horizontally paved according to the breadth with the width of 1.2m along the width direction, and the trapezoidal grooves on the paving base materials are aligned one by one in the front and back directions to form a first layer of bamboo substrate;
D. sequentially embedding a second layer of paving base materials on the first layer of bamboo base plate, wherein convex trapezoidal grooves on the second layer of paving base materials are mutually and tightly occluded with corresponding concave trapezoidal grooves on the first layer of paving base materials, the upper and lower layers of paving base materials are arranged in a staggered manner in an I shape in a layered manner, and all the paving base materials on the second layer are aligned and paved to form a second layer of bamboo base plate;
E. according to the requirements of the number and thickness of the layers to be manufactured, the step D can be repeated as required, and the upper trapezoidal groove and the lower trapezoidal groove are in concave-convex close engagement with each other to form a third layer or even more layers of bamboo substrates;
F. the two-layer or multi-layer bamboo base plate enters a multi-layer plane press to be pressed, and a bamboo splint finished product with the breadth length of 2.4m, the width of 1.2m and the thickness of more than 9mm is formed.
Further, the camber angle of the trapezoidal groove is 45 °. The top width of the trapezoid groove is 16mm-2D, the bottom width is 16mm +2D, the processing depth of the trapezoid groove is D, and the value of D is 2-3 mm.
The bamboo splint with bamboo sheets as base materials has the length of 2.4m, the width of 25mm and the thickness of 6-8 mm, and is characterized in that: a plurality of trapezoidal grooves with camber angles and mutually concave-convex contraposition are uniformly and equidistantly processed on the upper surface and/or the lower surface of each bamboo raw material sheet, the sheets with the trapezoidal grooves on the upper surface and/or the lower surface are used as paving base materials, a plurality of paving base materials are horizontally paved, connected and bonded to form a layer of bamboo base plate with the width of 1.2m, the bamboo splint is formed by laminating and bonding at least two layers or multiple layers of bamboo base plates, the convex trapezoidal grooves on the paving base materials are mutually and tightly occluded with the corresponding concave trapezoidal grooves on the paving base materials of the other layer, and the upper and lower paving base materials are arranged in a staggered mode in an I shape.
Further, the camber angle of the trapezoidal groove is 45 °. The bamboo splint is characterized in that the whole thickness of the two or more layers of bamboo base plates after being laminated is 9-25 mm.
The core of the technology is as follows: each bamboo sheet raw material is provided with a trapezoidal groove and an I-shaped plane pavement process and a grooving material loss of about 200 yuan/cubic meter (if the 12.5 to 25 percent loss increased by 1000 yuan cubic meter is about 125 to 250 yuan) to replace the side pressure process of thousands yuan bamboo sheets. The production cost of the single clamping plate can be reduced by directly using a multilayer plane press to carry out large-scale mass production plate manufacturing.
Compared with the traditional bamboo plywood processed and formed by side pressing, the bamboo plywood has the following remarkable advantages in terms of the paving and connecting structure of the plywood: 1. after the trapezoidal groove is formed, the gluing contact area of the two trapezoidal bevel edges is increased between the upper and lower paving and connecting base materials, and the gluing firmness is improved. Trapezoid grooves which are in concave-convex contraposition with each other in the length direction of 2.4m are formed between the upper layer of bamboo substrate and the lower layer of bamboo substrate. 2. After paving and jointing, the formed plurality of concave-convex contraposition trapezoidal grooves can improve the bending resistance of the glued bamboo chips in the length direction of 2.4 m. 3. The seam between the upper trapezoidal groove and the lower trapezoidal groove can realize the mutual impact of the internal stress between the two layers of bamboo chip paving and connecting base materials, and the deformation of the splint plate is greatly reduced.
The invention has the advantages that: 1. the bamboo splint can be manufactured and combined by using the existing wood working machinery, the accessory assembly, the parts and the general materials to realize the one-time processing and forming of the bamboo splint without special equipment. 2. The automatic production degree is high, the bamboo sheet interlamination pavement has the advantages that the manual operation is possibly required because the final pass of quality inspection and the I-shaped stacking are realized, and the realization condition still exists in the automatic stacking. 3. The method has the advantages that all processes from the bamboo chip raw material to the use of a multilayer plane press can be realized in one step by one-step processing and forming, the side press plate processing process with low yield and high cost in the prior art is completely avoided, and secondary processing by the semi-finished laminated wood is not needed. 4. The manufacturing cost of the bamboo plywood is equal to the market competitiveness of the wooden plywood by efficient batch production, and the market prospect is wide.
Drawings
Fig. 1 is a schematic plan view of a single-sided lay-on substrate 1 of the present invention.
Fig. 2 is a perspective view of fig. 1.
Fig. 3 is a schematic plan view of the double-sided paved substrate 2.
Fig. 4 is a perspective view of fig. 3.
FIG. 5 is a schematic diagram of a multi-axis multi-head woodworking milling machine for processing a single-sided paved substrate and a double-sided paved substrate.
FIG. 6 is a schematic diagram of the engagement of the upper and lower layers of single-sided lay-on substrate of the first embodiment.
Fig. 7 is a schematic end view of the finished bamboo splint according to the embodiment.
Fig. 8 is an enlarged view of sectionbase:Sub>A-base:Sub>A of fig. 7.
Fig. 9 is a schematic top view of fig. 7.
Fig. 10 is a perspective exploded view of the layers of the bamboo substrate of fig. 7.
Figure 11 is a schematic view of a conventional art finished bamboo splint.
Description of reference numerals: 1-single-side paving base material, 1A-second-layer single-side paving base material, 11-bottom-layer bamboo base plate, 21-second-layer bamboo base plate, 31-third-layer bamboo base plate, 41-fourth-layer bamboo base plate and 2-double-side paving base material.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail by referring to the following embodiments.
In the processing method of this embodiment, the apparatus for processing the trapezoidal groove from the bamboo chip raw material includes: an 84-axis multi-head woodworking milling machine with the center distance of 32mm, a milling cutter for processing trapezoidal grooves, a conveying mechanism for conveying bamboo chip paving base materials subjected to trapezoidal groove processing to a paving procedure, a glue spreader for spreading glue on the surface and a multi-layer plane press are conventional woodworking processing equipment.
Each bamboo chip raw material is processed into a uniform specification in advance, and the bamboo chip raw material has the length of 2.4m, the width of 25mm and the thickness of 6-8 mm.
Referring to fig. 5, an 84-axis multi-head woodworking milling machine with a processing breadth of 2.4m and a center distance of 32mm is used for uniformly processing trapezoidal grooves with a top width of 16mm-2D and a bottom width of 16mm +2d with a camber angle of 45 degrees on the surface of a bamboo chip raw material in the width direction, and D is the processing depth of the groove, wherein the value of D in the embodiment is 3mm, if double-sided trapezoidal groove processing is required, the bamboo chip raw material is only required to be turned over to the back and processed once.
In the first embodiment, a finished bamboo splint product with double layers of planes pressed is processed.
Referring to fig. 1, 2, 5 and 6, the processing method comprises the following steps: according to the specification requirements of the double-layer bamboo splint finished product, the selection of the bamboo chip raw material and the selection and installation of the milling cutter are determined; processing a bamboo chip raw material into a single-side paving base material 1 with a trapezoidal groove on a single side through an 84-axis multi-head woodworking milling machine, conveying the single-side paving base material 1 to a paving procedure for paving through a conveying mechanism and an end face glue coating machine in the conveying process, horizontally paving a plurality of single-side paving base materials 1 with glue coated on the surfaces along the width direction according to the breadth of 1.2m, and aligning the trapezoidal grooves on the single-side paving base materials 1 one by one in the front and back to form a bottom layer bamboo substrate 11.
A second layer of single-sided paving base materials 1A as a surface layer are sequentially embedded into the bottom layer bamboo substrate 11, convex trapezoidal grooves in the second layer of single-sided paving base materials 1A are tightly meshed with corresponding concave trapezoidal grooves in the bottom layer of single-sided paving base materials 1, as shown in figure 6, the upper and lower layers of paving base materials are arranged in a staggered mode in an I shape in a layered mode, and all paving base materials in the second layer are aligned and paved to form the surface layer bamboo substrate. In the double-layer plane press-fit molding of the present embodiment, the structures of the top layer bamboo substrate and the bottom layer bamboo substrate 11 are completely the same, but the paving directions are opposite, one layer faces upwards, and the other layer faces downwards.
And after the H-shaped staggered layered pavement is finished, the finished bamboo splint product with double layers of planes pressed is finished through a multi-layer plane press. The final product web had a length of 2.4m, a width of 1.2m and a thickness of 9 mm.
And in the second embodiment, a bamboo plywood finished product with four layers of planes pressed is processed.
Referring to fig. 4, 5 and 7-10, the specific processing method is as follows: through an 84-axis multi-head woodworking milling machine, the upper surface and the lower surface of a bamboo sheet raw material are secondarily processed into a double-sided paving substrate 2 with a double-sided concave-convex dovetail groove, the double-sided paving substrate 2 with the double-sided concave-convex dovetail groove processed is conveyed through a conveying machine, the surface of the double-sided paving substrate 2 is coated with glue through a glue spreader in the conveying process, and the double-sided paving substrate is conveyed to a paving procedure for paving.
The paving process comprises the following steps: firstly, after the bottom surface of a single-face paving base material 1 with a trapezoidal groove on one face is paved, namely, a second layer of double-face paving base materials 2 are sequentially embedded into a bottom layer of bamboo base plate 11, convex trapezoidal grooves on the second layer of double-face paving base materials 2 are mutually and tightly occluded with corresponding concave trapezoidal grooves on a first layer of paving base materials 1, the upper and lower layers of paving base materials are arranged in a staggered manner in an I shape in a layered mode, all the paving base materials of the second layer are aligned and paved to form a second layer of bamboo base plate 21, then the double-face paving base materials 2 are paved layer by layer to form a third layer of bamboo base plate 31, finally, the paving base materials 1 with the trapezoidal grooves on one face are paved to form a fourth layer of bamboo base plate 41, namely, a face layer of bamboo base plate, the bamboo base plates of all layers are paved in a staggered manner in an I shape in a layered mode (see figure 8), and finally, a multi-layer planar laminated bamboo splint finished product is completed through a multi-layer planar press. The final product web had a length of 2.4m, a width of 1.2m and a thickness of 15 mm.
In addition to the above embodiments, the thickness of the bamboo sheet material generally has three specifications of 6mm, 7mm and 8mm, and the corresponding processing depth D also has three specifications of 2mm, 2.5mm and 3mm, so that theoretically 9 specifications of the finished double-layer bamboo plywood can be combined, and the multi-layer bamboo plywood can be selectively stacked and thickened on the 9 specifications.
The gang drill row with 5 shafts, 11 shafts and 21 shafts and taking 32mm as the center distance is a processing assembly of the existing woodworking machine, is widely applied to a multi-head drilling machine and a milling machine, and adopts 4 groups of gang drill rows with 21 shafts for processing.
It should be understood that the application of the patent is not limited to the examples described above, and that equivalent modifications or changes can be made by those skilled in the art according to the above description, and all such equivalent modifications and changes should fall within the scope of the claims of the present patent, which are not described herein again.
Claims (6)
1. A processing method for manufacturing a splint by bamboo sheets comprises the following steps: the multi-shaft multi-head woodworking milling machine, the conventional glue spreader and the conventional multilayer plane press are characterized in that the length of each bamboo chip raw material is 2.4m, the width is 25mm, and the thickness is 6-8 mm:
A. a multi-shaft multi-head woodworking milling machine with the processing breadth length of 2.4m and the center distance of 32mm is used for uniformly and equidistantly processing a plurality of trapezoidal grooves with camber angles, which are in concave-convex contraposition, on the upper surface and/or the lower surface of each bamboo chip raw material along the width direction of the bamboo chip raw material, and the sheets with the trapezoidal grooves on the upper surface and/or the lower surface at equal intervals are used as paving base materials;
B. conveying the paving base material to the next procedure for paving through a conveying mechanism, and coating the surface of the paving base material with glue through an end face glue coating machine in the conveying process;
C. when in pavement, a plurality of paving base materials coated with glue on the surfaces are horizontally paved according to the breadth with the width of 1.2m along the width direction, and the trapezoidal grooves on the paving base materials are aligned one by one in the front and at the back to form a first layer of bamboo substrate;
D. sequentially embedding a second layer of paving base materials on the first layer of bamboo substrate, wherein convex trapezoidal grooves on the second layer of paving base materials are mutually and tightly meshed with corresponding concave trapezoidal grooves on the first layer of paving base materials, the upper and lower layers of paving base materials are arranged in a staggered manner in an I shape in a layering manner, and all the paving base materials on the second layer are aligned and paved to form a second layer of bamboo substrate;
E. according to the requirements of the number and thickness of the layers to be manufactured, the step D can be repeated as required, and the upper trapezoidal groove and the lower trapezoidal groove are in concave-convex close engagement with each other to form a third layer or even more layers of bamboo substrates;
F. the two-layer or multi-layer bamboo base plate enters a multi-layer plane press to be pressed, and a bamboo splint finished product with the breadth length of 2.4m, the width of 1.2m and the thickness of more than 9mm is formed.
2. The process of claim 1, wherein the camber angle of the trapezoidal groove is 45 °.
3. The processing method as claimed in claim 1 or 2, wherein the top width of the trapezoidal groove is 16mm-2D, the bottom width is 16mm +2D, the processing depth of the trapezoidal groove is D, and the value of D is 2-3 mm.
4. The bamboo splint with bamboo sheets as base materials has the length of 2.4m, the width of 25mm and the thickness of 6-8 mm, and is characterized in that:
a plurality of trapezoidal grooves with camber angles and mutually concave-convex contraposition are uniformly and equidistantly processed on the upper surface and/or the lower surface of each bamboo raw material sheet, the sheets with the trapezoidal grooves on the upper surface and/or the lower surface are used as paving base materials, a plurality of paving base materials are horizontally paved, connected and bonded to form a layer of bamboo base plate with the width of 1.2m, the bamboo splint is formed by laminating and bonding at least two layers or multiple layers of bamboo base plates, the convex trapezoidal grooves on the paving base materials are mutually and tightly occluded with the corresponding concave trapezoidal grooves on the paving base materials of the other layer, and the upper and lower paving base materials are arranged in a staggered mode in an I shape.
5. The bamboo splint according to claim 4, wherein the trapezoidal groove has an outer inclination of 45 °.
6. The bamboo splint according to claim 4, wherein the two or more layers of bamboo substrates have an overall thickness of 9 to 25mm after being laminated.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211593800.XA CN115723217A (en) | 2022-12-13 | 2022-12-13 | Processing method for manufacturing plywood by using bamboo sheets |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211593800.XA CN115723217A (en) | 2022-12-13 | 2022-12-13 | Processing method for manufacturing plywood by using bamboo sheets |
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| CN115723217A true CN115723217A (en) | 2023-03-03 |
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| CN202211593800.XA Pending CN115723217A (en) | 2022-12-13 | 2022-12-13 | Processing method for manufacturing plywood by using bamboo sheets |
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