Radial bamboo flake unit preparation device and radial bamboo flake mixed pressure material manufacturing method

Abstract

This invention discloses a radial bamboo veneer unit preparation device, including a fixing device on the surface of a workbench for clamping semi-circular bamboo material, bamboo slicing devices on opposite sides of the workbench, slicing blades on the slicing devices, slicing along the length of the bamboo material, and a slicing stroke control mechanism connected to the slicing devices for controlling the thickness of the sliced ​​bamboo veneers. The bamboo veneers are collected in quantitative clumps as units. This invention also discloses a method for manufacturing radial bamboo veneer mixed-pressed material. The bamboo veneer unit preparation device of this invention slices along the longitudinal grain of the bamboo material, avoiding the hard and brittle bamboo green and yellow parts, resulting in less blade wear, crack-free bamboo veneers that are not easily broken, and high surface quality. The double-sided, double-group continuous slicing with a rapid return characteristic ensures high processing efficiency. It avoids removing bamboo nodes, bamboo green and yellow parts, resulting in high bamboo material utilization. The clump-shaped quantitative units achieve continuous and uniform laying, and the disordered mixed-pressed fiber interlacing significantly increases the mechanical strength of the board.

Description

Technical Field

[0001] This invention belongs to the field of bamboo processing technology, specifically relating to a radial bamboo sheet unit preparation device and a novel radial bamboo sheet mixed pressing material manufacturing method. Background Technology

[0002] With the rise of low-carbon concepts and the "bamboo is superior to wood" philosophy, research on high-quality bamboo products is gaining momentum. Compared to wood, bamboo boasts high strength, good toughness, high density, and beautiful texture, making it an ideal raw material for engineering structures and decorative materials. However, bamboo's small diameter, hollow structure, and thin walls restrict its industrial development. Current bamboo slicing methods suffer from low utilization rates, damage to the original bamboo structure, and instability in paving structures. Existing methods and devices for slicing bamboo veneers also have shortcomings. Firstly, they ignore the directional grain of bamboo, with the cutting blade parallel to the grain during preparation, which damages the bamboo fiber strength and fails to meet the requirements for high-quality bamboo veneers. Secondly, starting the cut from the green or yellow part of the bamboo, which is harder and more brittle due to its high silica content, places high demands on the strength of the cutting tools. This invention uses a grain-direction cutting method, significantly reducing tool wear. On the other hand, considering the characteristics of bamboo, due to the curvature of bamboo itself, the density of the green side of bamboo is greater than that of the yellow side. In the traditional radial bamboo veneer unit preparation process, the tool is always cut at a fixed angle during the preparation process, which cannot guarantee complete radial cutting. This results in the bamboo veneer changing from radial to tangential, leading to uneven bamboo veneer structure. In addition, existing technologies generally suffer from low processing efficiency and low automation levels. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a radial bamboo veneer unit preparation device and a novel radial bamboo veneer mixed pressing material manufacturing method in view of the shortcomings of the prior art. The prepared radial bamboo veneers are weighed and oriented and continuously laid to obtain a novel radial bamboo veneer laminate with uniform density, high utilization rate and stable size.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is: a radial bamboo veneer unit preparation device, including a worktable, a fixing device for clamping semi-circular bamboo material is provided on the upper surface of the worktable, a hopper for collecting bamboo veneers obtained after slicing is provided at the bottom of the worktable behind the fixing device, slicing devices for slicing bamboo material along the length direction of the bamboo material are provided on opposite sides of the worktable, a rotary cylinder is provided on the slicing device, a slicing blade is provided on the rotary cylinder, the slicing blade slices along the length direction of the bamboo material, and the slicing device is connected to a slicing stroke control mechanism for controlling the thickness of the sliced ​​bamboo material.

[0005] Preferably, the clamping and fixing device includes two baffles, baffle a and baffle b, wherein baffle a is fixed on the worktable, baffle b is slidably connected to the worktable by a spring, one end of the spring is fixedly connected to baffle b, and a handle is fixedly connected to baffle b, and the other end of the spring is fixedly connected to the worktable.

[0006] Preferably, the slicing device includes a first cam, a second cam, a first L-shaped slide rod, a second L-shaped slide rod, a first sprocket, chain a, a second sprocket, a first motor, a rotary cylinder, a cylinder air pipe, a slicing blade, a second fixed slider, a first cam roller, a second cam roller, a cross slider, a first fixed slider, a second column, and a third motor; the second sprocket is fixedly connected to the output shaft of the first motor, the first motor is fixedly mounted on the worktable, the first sprocket is fixedly mounted on the rotation shaft of the first cam, the first sprocket and the second sprocket are connected by chain a, the first cam is rotatably mounted on the third column, a groove is formed on the outer side of the first cam, and the first cam roller is rotatably connected in the groove. The first cam roller is rotatably connected to one end of the first L-shaped slide rod. The other end of the first L-shaped slide rod is slidably connected to one end of the second L-shaped slide rod via a cross slider. The other end of the second L-shaped slide rod is rotatably connected to a second cam roller. The second cam roller is rotatably connected to the second cam. The second cam is driven to rotate by a third motor. The third motor is fixed on a linear ratchet mechanism. A rotary cylinder is fixedly connected to the cross slider. The rotary cylinder is bolted to the blade mounting plate. The blade mounting plate is fixedly connected to the slicing blade. The slicing direction of the slicing blade is set along the length of the bamboo. The rotary cylinder controls the angle between the blade mounting plate and the slicing blade and the horizontal plane. The rotary cylinder causes the slicing blade to rotate and tilt outwards from the bamboo.

[0007] Preferably, the first L-shaped slide rod is slidably mounted on the first column via a first fixed slider. Both ends of the first fixed slider are fixed to the first column with screws, so that the first L-shaped slide rod slides horizontally. The second L-shaped slide rod is slidably mounted on the second column via a second fixed slider. Both ends of the second fixed slider are fixed to the second column with screws, so that the second L-shaped slide rod slides vertically. A mounting plate is bolted to the side of the cross slider closest to the bamboo material. The rotary cylinder is bolted to the mounting plate. The blade mounting plate is bolted to the rotary cylinder. The slicing blade is bolted to the blade mounting plate. The rotary cylinder has a cylinder air pipe.

[0008] Preferably, the planing stroke control mechanism includes a four-bar linkage and a linear ratchet mechanism.

[0009] Preferably, the four-bar linkage includes a driving rod, a first driven rod, a second driven connecting rod, and a driving pawl. One end of the driving rod is fixedly connected to the connecting rod via a first hinge, and the other end of the driving rod and one end of the first driven rod are rotatably mounted on a second column via a second hinge. The other end of the first driven rod, one end of the second driven connecting rod, and one end of the driving pawl are connected via a third hinge. The other end of the second driven connecting rod is rotatably mounted on the second column via a fourth hinge. The other end of the driving pawl engages with a ratchet tooth. A pawl spring is installed near the connection end between the second driven connecting rod and the driving pawl. A third sprocket is fixedly mounted on one end of the connecting rod. The third sprocket is connected to a fourth sprocket via chain b. The fourth sprocket is fixedly mounted on the output shaft of a second motor, which is fixed to the lower side of the worktable. A check pawl is installed on the other side of the pawl opposite to the driving pawl. The check pawl is mounted on the base via a check pawl hinge, and a check pawl spring is also connected between the check pawl and the base.

[0010] Preferably, the linear ratchet mechanism includes a transmission belt, ratchet teeth disposed on the outer periphery of the transmission belt, and internal teeth disposed on the inner periphery of the transmission belt. The internal teeth on the inner side of the transmission belt mesh with two gears, namely an upper gear located at the upper position and a lower gear located at the lower position. The gear shafts of the gears are rotatably mounted on a second column. A third motor is fixedly mounted on the transmission belt. The output shaft of the third motor passes through a second cam and is rotatably connected to a sleeve. The lower side of the sleeve is fixed to the top of a support spring. The bottom end of the support spring is slidably connected to a third slider. The third slider is slidably disposed in a sliding groove opened on the base. The sliding groove is opened along the direction of ratchet rotation.

[0011] This invention also discloses a method for manufacturing radial bamboo sheet composite pressing material, the method comprising:

[0012] S1. Using the above-mentioned radial bamboo sheet unit preparation device, bamboo is sliced ​​to obtain radial bamboo sheets, which are then weighed and quantitatively obtained to obtain radial bamboo sheet units. The quantitative radial bamboo sheet units are then shaped into clump-shaped bamboo sheet units, and finally the clump-shaped bamboo sheet units are dried at 60-100℃ until the moisture content is 8%-15%.

[0013] S2. The dried clump-shaped bamboo sheet units are impregnated with phenolic resin with a solid content of 18%, and then dried again at 60°C until the moisture content is 8%-15% to obtain clump-shaped impregnated bamboo sheet units; the impregnation amount of the clump-shaped impregnated bamboo sheet units is 6%-12%.

[0014] S3. Arrange the obtained clump-shaped impregnated bamboo sheet units in an orderly manner, with the clump-shaped impregnated bamboo sheet units interspersed between adjacent rows. Use radial bamboo sheets to fill the edges, and then pre-press. If the board obtained after pre-pressing shows obvious density unevenness, add impregnated radial bamboo sheets and then pre-press again.

[0015] S4. The pre-pressed, uniformly dense board is hot-pressed into shape, then cut, cooled and post-treated to obtain radial bamboo sheet composite pressed material.

[0016] Preferably, the hot pressing temperature in S4 is 135-150℃, the hot pressing process is a hot pressing process dominated by the thickness of the slab, the time is determined by the thickness of the slab after pre-pressing and the thickness of the slab after hot pressing, and the compression thickness is maintained for 40-60 seconds per millimeter of hot pressing.

[0017] Preferably, the thickness of the bamboo sheet in S1 ranges from 0.3mm to 1.2mm, and the length is 500-1000mm; the length of the bamboo material is 500-1000mm.

[0018] Preferably, the radial bamboo sheet unit in S1 has a weighed weight of 250-350g.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. This invention uses bamboo slicing units prepared along the grain, which releases the growth stress of bamboo, maintains the strength and surface quality of bamboo fibers, and produces radial bamboo slices that are not only less prone to breakage and have a smooth surface, but also avoid the hard and brittle bamboo green and bamboo yellow that are directly faced by transverse slicing, reducing the strength requirements of the cutting tools and reducing tool wear.

[0021] 2. The angle of rotation of the planing tool in this invention is adjustable, which can approximately maintain radial planing, making the planed bamboo veneers have uniform density and more reasonably exploring the characteristics of radial bamboo veneer composite pressing material.

[0022] 3. The linear ratchet mechanism designed in this invention makes the planing process an intermittent motion, which conforms to the motion conditions of planing.

[0023] 4. The present invention incorporates slicing devices on both sides of the bamboo material for slicing, increasing efficiency by 100%. The two sets of slicing devices perform continuous slicing, and the slicing return stroke has a rapid return characteristic, increasing efficiency by 200%.

[0024] 5. This invention does not require the removal of bamboo nodes, bamboo green and bamboo yellow. The bamboo green and bamboo yellow are naturally distributed on the narrow side of the radial bamboo sheet, resulting in a high yield of bamboo material and stable bonding performance.

[0025] 6. This invention replaces traditional small bamboo shavings with ultra-long bamboo veneers. The granular, quantitative arrangement enables automated and continuous installation. The randomized, interlaced fiber arrangement significantly increases the mechanical strength of the board, such as static bending strength, modulus of elasticity, and internal bond strength. Simultaneously, the radial bamboo veneer units offer high processing efficiency and high bamboo utilization. Compared to traditional bamboo plywood, the prepared radial bamboo veneer composite laminate has advantages such as high surface quality, high bamboo utilization, and simple, continuous production processes, making it an upgraded product of traditional bamboo plywood and bamboo particleboard.

[0026] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the radial bamboo sheet unit preparation device of the present invention.

[0028] Figure 2 This is a schematic diagram of the main structure of the slicing device of the radial bamboo veneer unit preparation apparatus of the present invention.

[0029] Figure 3 This is the present invention. Figure 2 Enlarged view of part A in the middle.

[0030] Figure 4 This is a side view of the slicing device of the radial bamboo veneer unit preparation apparatus of the present invention.

[0031] Figure 5 This is a side view of the slicing stroke control mechanism of the radial bamboo veneer unit preparation device of the present invention.

[0032] Figure 6 This is a side view of the linear ratchet mechanism of the radial bamboo sheet unit preparation device of the present invention.

[0033] Figure 7 This is a schematic diagram of the cross-sectional structure of the worktable of the radial bamboo sheet unit preparation device of the present invention.

[0034] Figure 8 This is a schematic diagram of the working process of the radial bamboo sheet unit preparation device of the present invention for slicing bamboo.

[0035] Figure 9 This is a schematic diagram showing the connection between the slicing blade and the blade mounting plate of the radial bamboo veneer unit preparation device of the present invention.

[0036] Figure 10 This is a plan view of the radial bamboo sheet material prepared in Embodiment 2 of the present invention.

[0037] Figure 11 This is a side view of the radial bamboo sheet material prepared in Embodiment 2 of the present invention.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1—First cam; 2—First column; 3—First sprocket; 4—Chain a; 5—Second sprocket; 6—First motor; 7—First cam roller; 8—First fixed slider; 9—Screw; 10—First L-shaped slide bar; 11—Cross slider; 12—Mounting plate; 13—Rotary cylinder; 14—Cylinder air pipe; 15—Planing blade; 16—Blade mounting plate; 17—Bamboo material to be planed; 18—Spring; 19—Hand lever; 20—Workbench; 21—Second fixed slider; 22—Second L-shaped slide bar; 23—Second cam roller; 24—Second cam; 25—Ratchet; 26—Check pawl; 27—Check pawl hinge; 28—Second column; 33—Connecting rod; 34—Third sprocket; 35—Chain b; 36—Fourth sprocket; 37—Second motor; 38—Third motor; 39—Base; 40—Control panel; 41—Third column; 44—Pawl spring; 45-0—Drive rod; 45-1—First driven rod; 45-2—Second driven connecting rod; 45-3—Drive pawl; 45-4—First hinge; 45-5—Second hinge; 45-6—Third hinge; 45-7—Fourth hinge; 46—Third slider; 47—Support spring; 48—Sleeve; 50—Drive belt; 51—Ratchet; 52—Internal tooth; 53-1—Upper gear; 53-2—Lower gear; 54—Gear shaft. Detailed Implementation

[0040] Example 1

[0041] like Figure 1-9 As shown, this embodiment discloses a radial bamboo veneer unit preparation device. The upper surface of the worktable 20 is provided with a clamping and fixing device for clamping a semi-circular bamboo material 17 to be sliced. The bottom of the worktable 20, located behind the clamping and fixing device, is provided with a hopper for collecting the bamboo veneers obtained after slicing. Both sides of the worktable 20 are provided with slicing devices for slicing the bamboo material 17 along its length. The slicing devices are provided with slicing blades 15, which slice along the length of the bamboo material 17. The slicing devices are connected to a slicing stroke control mechanism for controlling the thickness of the sliced ​​bamboo material.

[0042] In this embodiment, the included angle between the slicing blade 15 and the processed surface of the bamboo material 17 is 30°-60°.

[0043] In this embodiment, the clamping and fixing device includes two baffles, namely baffle a and baffle b. Baffle a is fixed on the workbench 20, and baffle b is slidably connected to the workbench 20 by a spring 18. One end of the spring 18 is fixedly connected to baffle b, and a handle 19 is fixedly connected to baffle b. The other end of the spring 18 is fixedly connected to the workbench 20. By pulling the handle 19 away from baffle a, and then placing the bamboo material 17 between the two baffles, and releasing the handle 19, the bamboo material 17 to be sliced ​​is clamped and fixed on the workbench 20 under the action of the elastic return force of the spring 18.

[0044] In this embodiment, the semi-circular bamboo material 17 to be sliced ​​is obtained by slicing a bamboo tube in half.

[0045] Specifically, the workbench 20 has a groove for accommodating the spring 18. One end of the spring 18 is fixed to the inner wall of the groove, and the other end is fixed to the baffle b. The baffle b is located on the upper surface of the workbench 20 and is parallel to the baffle a. It is used to clamp the bamboo material 17 to be sliced.

[0046] In this embodiment, the slicing device includes a first cam 1, a second cam 24, a first L-shaped slide bar 10, a second L-shaped slide bar 22, a first sprocket 3, a chain a 4, a second sprocket 5, a first motor 6, a rotary cylinder 13, a cylinder air pipe 14, a slicing blade 15, a second fixed slider 21, a first cam roller 7, a second cam roller 23, a cross slider 11, a first fixed slider 8, a second column 28, and a third motor 38.

[0047] A second sprocket 5 is fixedly connected to the output shaft of the first motor 6. The first motor 6 is fixedly mounted on the worktable 20. A first sprocket 3 is fixedly mounted on the rotation shaft of the first cam 1. The first sprocket 3 and the second sprocket 5 are connected by a chain a 4. The first cam 1 is rotatably mounted on the third column 41. A sliding groove is provided on the outer side of the first cam 1. A first cam roller 7 is rotatably connected in the sliding groove. The first cam roller 7 is rotatably connected to one end of the first L-shaped slide rod 10. The other end of the first L-shaped slide rod 10 is slidably connected to one end of the second L-shaped slide rod 22 through a cross slider 11. The other end of the second L-shaped slide rod 22 is rotatably connected to a second cam roller 23. The second cam roller 23 is rotatably connected to a second cam 24. The second cam 24 is powered by the third motor 3. The third motor 38 is fixed on the linear ratchet mechanism and driven to rotate. A rotary cylinder 13 is fixedly connected to the cross slider 11. The rotary cylinder 13 is bolted to the blade mounting plate 16. The blade mounting plate 16 is fixedly connected to the slicing blade 15. The slicing direction of the slicing blade 15 is set along the length of the bamboo material 17 to be sliced. The rotary cylinder 13 controls the angle between the blade mounting plate 16 and the slicing blade 15 and the horizontal plane. Specifically, the rotary cylinder 13 causes the slicing blade 15 to rotate and tilt outward from the bamboo material 17 to be sliced.

[0048] In this embodiment, the cross slider 11 is bolted to the side near the bamboo with a mounting plate 12. A rotary cylinder 13 is bolted to the mounting plate 12. A blade mounting plate 16 is bolted to the rotary cylinder 13. The slicing blade 15 is bolted to the blade mounting plate 16. The rotary cylinder 13 has a cylinder pipe 14. The intake of compressed air is controlled by the cylinder pipe 14, thereby controlling the rotation angle of the rotary cylinder 13. This allows adjustment of the angle at which the blade of the slicing blade 15 tilts towards the outside of the bamboo.

[0049] Specifically, the mounting plate 12 can be an iron plate.

[0050] In this embodiment, the first L-shaped slide rod 10 is slidably mounted on the first column 2 via the first fixed slider 8. Both ends of the first fixed slider 8 are fixed on the first column 2 via screws 9, so that the first L-shaped slide rod 10 slides horizontally. The second L-shaped slide rod 22 is slidably mounted on the second column 28 via the second fixed slider 21. Both ends of the second fixed slider 21 are fixed on the second column 28 via screws 9, so that the second L-shaped slide rod 22 slides vertically.

[0051] In this embodiment, both the first cam 1 and the second cam 24 are disc cams.

[0052] In this embodiment, the blade mounting plate 16 has a U-shaped structure from the front of the planing and an L-shaped structure from the side, and the planing blade 15 is clamped at the opening of the U-shaped structure.

[0053] In this embodiment, the first cam 1 provides an upward motion trajectory for the cross slider 11, and the second cam 24 provides a forward motion trajectory for the cross slider 11. The first cam 1 rotates under the drive of the first motor 6, initiating the stroke. The second cam 24 rotates under the drive of the third motor 38, also initiating the stroke. The first cam roller 7 moves along a circular trajectory with a smaller diameter on the first cam 1, and the second cam roller 23 moves along a circular trajectory with a larger diameter on the second cam 24. The motion trajectory of the cross slider 11 is a straight line motion from the head end to the tail end of the bamboo material 17. The spacing on the cross slider 11... The connected slicing blade 15 slices from the head to the tail of the bamboo 17. When the first cam roller 7 contacts the larger diameter circular track of the first cam 1, and the second cam roller 23 contacts the smaller diameter circular track of the second cam 24, the movement trajectory of the cross slider 11 is an upward arc movement from the tail end of the bamboo 17 back to the head end. At this time, the cross slider 11 will return to the initial position at the head end of the bamboo 17. During the arc movement of the cross slider 11, the slicing stroke of the other set of slicing devices is a linear movement. The slicing of the two sets of slicing devices can be completely avoided, thereby realizing continuous multiple slicing of the bamboo 17. Therefore, the two slicing devices adopt an alternating slicing working mode when slicing bamboo.

[0054] In this embodiment, the bottoms of the first column 2 and the second column 28 are both fixed to the base 39. The third column 41, the base 39, and the workbench 20 are all fixedly installed on the ground.

[0055] In this embodiment, the vertical cross-section of the workbench 20 used to clamp the bamboo 17 is an inverted funnel shape, which is beneficial to prevent the slicing blade 15 of the slicing device from touching the workbench 20 when it rotates, and does not affect normal slicing.

[0056] In this embodiment, the planing stroke control mechanism includes a four-bar linkage and a linear ratchet mechanism; the four-bar linkage includes a driving link 45-0, a first driven link 45-1, a second driven link 45-2, and a driving pawl 45-3. One end of the driving link 45-0 is fixedly connected to the link 33 via a first hinge 45-4, and the other end of the driving link 45-0 and one end of the first driven link 45-1 are rotatably mounted on the second column 28 via a second hinge 45-5. One end of the second driven link 45-2 and one end of the drive pawl 45-3 are connected by a third hinge 45-6. The other end of the second driven link 45-2 is rotatably mounted on the second column 28 by a fourth hinge 45-7. The other end of the drive pawl 45-3 engages with a ratchet 25. A pawl spring 44 is installed between the second driven link 45-2 and the drive pawl 45-3 near the connection end. A third sprocket 34 is fixedly mounted on one end of the link 33. The third sprocket 34 is connected to a fourth sprocket 36 via a chain b 35. The fourth sprocket 36 is fixedly mounted on the output shaft of the second motor 37, which is fixed to the lower side of the worktable 20. A check pawl 26 is installed on the other side of the pawl 25 opposite to the drive pawl 45-3. The check pawl 26 is mounted on the base 39 via a check pawl hinge 27. A check pawl spring is also connected between the check pawl 26 and the base 39.

[0057] The working process of the four-bar linkage is as follows: the output shaft of the second motor 37 rotates, driving the fourth sprocket 36 to rotate, which in turn drives the third sprocket 34 to rotate via the chain b 35. The rotation of the third sprocket 34 drives the connecting rod 33 to rotate, which in turn drives the driving rod 45-0 to rotate. The rotation of the driving rod 45-0 drives the first driven rod 45-1, the second driven connecting rod 45-2, and the driving pawl 45-3 to move in tandem. The driving pawl 45-3 then moves the ratchet 51 to drive the ratchet wheel to move.

[0058] The linear ratchet mechanism includes a transmission belt 50, ratchet teeth 51 disposed on the outer periphery of the transmission belt, and internal teeth 52 disposed on the inner periphery of the transmission belt. The internal teeth 52 on the inner side of the transmission belt 50 mesh with two gears, namely an upper gear 53-1 located at the upper position and a lower gear 53-2 located at the lower position. The gear shafts 54 of the gears are rotatably mounted on the second column 28. A third motor 38 is fixedly mounted on the transmission belt. The output shaft of the third motor 38 passes through the second cam 24 and is rotatably connected to a sleeve 48. The lower side of the sleeve 48 is fixed to the top of a support spring 47. The bottom end of the support spring 47 is slidably connected to a third slider 46. The third slider 46 is slidably disposed in a sliding groove opened on the base 39. The sliding groove is opened along the rotation direction of the ratchet teeth 51.

[0059] Specifically, the transmission belt 50 is a track-type transmission belt.

[0060] Specifically, the third slider 46 is a T-shaped slider, and the sliding groove is a T-shaped sliding groove that cooperates with the T-shaped slider.

[0061] In this embodiment, a control panel 40 is installed on the workbench 20. The control panel 40 is equipped with switches that control the first motor 6, the second motor 37, the third motor 38, and the rotary cylinder 13 respectively. Further explanation: since the slicing device and the slicing stroke control mechanism have two sets, the corresponding first motor 6, second motor 37, third motor 38, and rotary cylinder 13 also have two sets, each controlled independently.

[0062] Because the third motor 38 and the second cam 24 have their own weight, a support spring 47 is installed at the output shaft end of the third motor 38 to provide upward support for the third motor 3 and the second cam 24. When the bamboo material 17 begins to be sliced, the third motor 38 is on the right side of the linear ratchet mechanism (during the slicing period). Each time the bamboo material is sliced ​​from left to right, the drive pawl 45-3 of the four-bar linkage moves down one ratchet tooth 51. The linear ratchet mechanism drives the third motor 38 to move down one ratchet tooth 25 distance. During the downward movement of the third motor 38, the support spring 47 is compressed, and the elastic force of the support spring 47 is absorbed by the anti-return pawl 40. After multiple slices, the third motor 38 continues to move downward until the third motor 38 needs to move from the linear ratchet mechanism. The mechanism shifts from the right side to the left side of the linear ratchet mechanism. At this point, the third motor 38 and the support spring 47 move to the left side of the linear ratchet mechanism via the third slider 46. The bamboo 17 is now being sliced. The third motor 38 is located on the left side of the linear ratchet mechanism. When the support spring 47 is compressed to its maximum elasticity and can no longer be absorbed by the return pawl 40, the support spring 47, under the restoring elastic force, pushes the third motor 38 upwards. The third motor 38 then rises rapidly under the action of the support spring 47, achieving a quick return without impact and improving efficiency. Finally, the above process is repeated when the next piece of bamboo 17 to be sliced ​​is installed and fixed.

[0063] When the third motor 38 moves downwards by one ratchet distance, it drives the second cam 24 to also move downwards by one ratchet distance. The second cam roller 23, the second L-shaped slide bar 22, and the cross slider 11, which are in rolling cooperation with the second cam 24, all move downwards by one ratchet distance. Since the slicing blade 15 is fixed to the cross slider 11 through the blade mounting plate 16 and the rotary cylinder 13, the slicing blade 15 will also move downwards by one ratchet distance, thus achieving layer-by-layer slicing of bamboo. Therefore, the ratchet distance can be designed according to the actual needs of the thickness of the bamboo to be sliced. Generally speaking, a semi-circular bamboo tube is sliced ​​when the linear ratchet mechanism completes one cycle (i.e., the third motor 38 moves from the top of the linear ratchet mechanism to the bottom and turns, then quickly rises back to the starting position).

[0064] The bamboo slicing process in this embodiment is as follows: Before slicing begins, the bamboo 17 with a 180° curved cross-section is horizontally placed between the two baffles of the workbench 20 and clamped. The slicing blade 15 is set parallel to the a-cut surface of the bamboo 17. The two slicing devices are started sequentially, and the two slicing devices alternately slice the two a-cut surfaces of the bamboo 17 (e.g., ...). Figure 8 As shown), specifically, when the first set of slicing blades has processed to half the length of the bamboo, the second set of slicing devices is activated, and the second set of blades begins slicing. Initially, horizontal slicing is used on the bamboo 17 until the bamboo 17 is sliced ​​down to a 90° curved surface remaining in the cross-section, as shown... Figure 8 At the b-section position of the bamboo material 17, the rotary cylinders of the two slicing devices are adjusted to rotate the slicing blades 45° outwards from the bamboo material 17 to continue slicing. One slicing blade 15 rotates to the c-line position to continue slicing, and the other slicing blade 15 rotates to the d-line position to continue slicing. The first slice after rotation will produce a triangular waste material, until the bamboo material 17 is sliced ​​into a triangular cross-section waste material, at which point the slicing ends. The resulting curled radial bamboo sheet slides down the ramp and falls into the hopper. After slicing one semi-circular bamboo material 17, another bamboo material 17 is fixed and the above slicing process is repeated.

[0065] Example 2

[0066] This embodiment discloses a novel method for manufacturing radial bamboo sheet composite pressed material, the method comprising:

[0067] S1. Using the radial bamboo sheet unit preparation device described in Example 1, bamboo material 17 is sliced, wherein the angle between the slicing blade and the bamboo processing surface is 30°, to obtain radial bamboo sheets with a thickness of 1mm. Then, 250g of radial bamboo sheet units are weighed to obtain radial bamboo sheet units. The measured radial bamboo sheet units are then shaped into clumps of bamboo sheet units. Finally, the clumps of bamboo sheet units are dried at 100°C until the moisture content reaches 8%. The length of the bamboo material 17 is 1000mm.

[0068] S2. The dried clump-shaped bamboo sheet unit is impregnated with phenolic resin with a solid content of 18%, and then dried again at 60°C until the moisture content reaches 8%, to obtain the clump-shaped impregnated bamboo sheet unit; the impregnation amount of the clump-shaped impregnated bamboo sheet unit is 10%.

[0069] S3. Arrange the obtained clump-shaped impregnated bamboo sheet units in an orderly manner, with the clump-shaped impregnated bamboo sheet units interspersed between adjacent upper and lower rows. Use radial bamboo sheets to fill the edges, and then pre-press. If the board obtained after pre-pressing shows obvious density unevenness, add impregnated radial bamboo sheets and then pre-press again.

[0070] S4. The pre-compressed, uniformly dense board material is hot-pressed, then cut, cooled, and post-processed to obtain radial bamboo veneer composite pressed material. The specifications of the radial bamboo veneer composite pressed material are 900mm × 900mm × 12mm. The hot-pressing temperature is 150℃, and the hot-pressing method is a hot-pressing process dominated by the board thickness. The hot-pressing time is determined according to the thickness of the board after pre-compression and the thickness of the board after hot-pressing. Each millimeter of compressed thickness is maintained for 50 seconds of hot pressing.

[0071] Table 3. Mechanical property data of radial bamboo sheet laminates with three densities prepared in this embodiment.

[0072]

[0073]

[0074] As shown in Table 3, the radial bamboo sheet laminates of the three densities prepared in this embodiment all meet the performance requirements for oriented strand board in the national standard GB / T41715-2022.

[0075] Example 3

[0076] This embodiment discloses a novel method for manufacturing radial bamboo sheet composite pressed material, the method comprising:

[0077] S1. Using the radial bamboo sheet unit preparation device described in Example 1, bamboo material 17 is sliced, wherein the angle between the slicing blade and the bamboo processing surface is 30° to obtain radial bamboo sheets. Then, the radial bamboo sheet units are weighed and measured to 250g. The measured radial bamboo sheet units are then shaped into clumps of bamboo sheet units. Finally, the clumps of bamboo sheet units are dried at 60°C until the moisture content reaches 15%.

[0078] The length of the bamboo material 17 is 600 mm; the thickness of the obtained bamboo sheet is 0.6 mm;

[0079] S2. The dried clump-shaped bamboo sheet unit is impregnated with phenolic resin with a solid content of 18%, and then dried again at 60°C until the moisture content reaches 15% to obtain the clump-shaped impregnated bamboo sheet unit; the impregnation amount of the clump-shaped impregnated bamboo sheet unit is 8%.

[0080] S3. Arrange the obtained clump-shaped impregnated bamboo sheet units in an orderly manner, with the clump-shaped impregnated bamboo sheet units interspersed between adjacent upper and lower rows. Use radial bamboo sheets to fill the edges, and then pre-press. If the board obtained after pre-pressing shows obvious density unevenness, add impregnated radial bamboo sheets and then pre-press again.

[0081] S4. The pre-pressed, uniformly dense board is hot-pressed into shape, then cut, cooled, and post-processed to obtain radial bamboo veneer mixed pressed material. The specifications of the radial bamboo veneer mixed pressed material are 500mm×500mm×12mm. The hot-pressing temperature is 150℃, and the hot-pressing method is a hot-pressing process dominated by the board thickness. The hot-pressing time is determined according to the thickness of the board after pre-pressing and the thickness of the board after hot-pressing. Each millimeter of compressed thickness is maintained for 50 seconds of hot pressing.

[0082] Table 2. Mechanical property data of radial bamboo sheet laminates with three densities prepared in this embodiment.

[0083]

[0084]

[0085] As shown in Table 2, the radial bamboo sheet laminates of the three densities prepared in this embodiment all meet the performance requirements for oriented strand board in the national standard GB / T41715-2022.

[0086] Example 4

[0087] This embodiment discloses a novel method for manufacturing radial bamboo sheet composite pressed material, the method comprising:

[0088] S1. Using the radial bamboo sheet unit preparation device described in Example 1, bamboo material 17 is sliced, wherein the angle between the slicing blade and the bamboo processing surface is 30° to obtain radial bamboo sheets. Then, the radial bamboo sheet units are weighed and measured to a quantity of 250g. The quantity of radial bamboo sheet units is then shaped into a ball of bamboo sheet units. Finally, the ball of bamboo sheet units is dried at 80°C until the moisture content reaches 12%.

[0089] The length of the bamboo material 17 is 500 mm; the thickness of the obtained bamboo sheet is 0.5 mm;

[0090] S2. The dried clump-shaped bamboo sheet unit is impregnated with phenolic resin glue with a solid content of 18%, and then dried again at 60°C until the moisture content reaches 12% to obtain the clump-shaped impregnated bamboo sheet unit; the impregnation amount of the clump-shaped impregnated bamboo sheet unit is 9%.

[0091] S3. Arrange the obtained clump-shaped impregnated bamboo sheet units in an orderly manner, with the clump-shaped impregnated bamboo sheet units interspersed between adjacent upper and lower rows. Use radial bamboo sheets to fill the edges, and then pre-press. If the board obtained after pre-pressing shows obvious density unevenness, add impregnated radial bamboo sheets and then pre-press again.

[0092] S4. The pre-pressed, uniformly dense board is hot-pressed into shape, then cut, cooled, and post-processed to obtain radial bamboo veneer mixed pressed material; the specifications of the radial bamboo veneer mixed pressed material are 500mm×500mm×12mm; the hot-pressing temperature is 135℃, the hot-pressing method is a hot-pressing process dominated by the board thickness, and the hot-pressing time is determined according to the thickness of the board after pre-pressing and the thickness of the board after hot-pressing, and each millimeter of compressed thickness is maintained for 55s of hot pressing.

[0093] In this embodiment, quantitative weighing can be performed using a dynamic scale. The quantitative radial bamboo sheet units can be shaped into a ball shape using a rotating drum. The inner diameter of the drum can be 300mm, and the drum can rotate for 1-3 minutes at a speed of 80-150 rpm. After shaping, many radial bamboo sheets are rolled into a ball. Alternatively, a cross-shaped partition can be set radially inside the drum to divide its chamber into four chambers, thereby accelerating the shaping efficiency.

[0094] Three types of radial bamboo sheet laminates with different densities were prepared using the above method. The planar diagrams of the laminates are shown below. Figure 10 As shown in Figure 11, the side view is as shown in Figure 11. Figure 11 From top to bottom, the first two have a density of 0.85 g / cm³. 3 A side view of radially stacked bamboo veneers, with the two in the middle having a density of 0.73 g / cm³. 3 Side view of radially arranged bamboo veneer lumber, two with a density of 0.68 g / cm³. 3 A side view of radially shaped bamboo veneer laminated timber. The mechanical property data are shown in Table 1 below.

[0095] Table 3. Mechanical property data of radial bamboo sheet laminates with three densities prepared in this embodiment.

[0096]

[0097] As shown in Table 3, the radial bamboo sheet laminates of the three densities prepared in this embodiment all meet the performance requirements for oriented strand board in the national standard GB / T41715-2022.

[0098] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Any simple modifications, alterations, and equivalent changes made to the above embodiments based on the inventive essence shall still fall within the protection scope of the present invention.

Claims

1. A radial bamboo sheet unit preparation apparatus, characterized in that: The system includes a workbench (20), on the surface of which is provided a clamping and fixing device for clamping a semi-circular bamboo material (17) to be sliced. The bottom of the workbench (20) is provided with a hopper for collecting bamboo shavings obtained after slicing, located behind the clamping and fixing device. Both sides of the workbench (20) are provided with slicing devices for slicing bamboo material (17) along its length. A rotary cylinder (13) is provided on the slicing device, and a slicing blade (15) is provided on the rotary cylinder (13). The slicing blade (15) slices along the length of the bamboo material (17). The slicing device is connected to a slicing stroke control mechanism for controlling the thickness of the sliced ​​bamboo material. The slicing device includes a first cam (1), a second cam (24), a first L-shaped slide bar (10), a second L-shaped slide bar (22), a first sprocket (3), and a chain a. (4), second sprocket (5), first motor (6), rotary cylinder (13), cylinder pipe (14), planing blade (15), second fixed slider (21), first cam roller (7), second cam roller (23), cross slider (11), first fixed slider (8), second column (28) and third motor (38); the output shaft of the first motor (6) is fixedly connected to the second sprocket (5), the first motor (6) is fixedly installed on the workbench (20), the first sprocket (3) is fixedly installed on the rotating shaft of the first cam (1), the first sprocket (3) and the second sprocket (5) are connected by chain a (4), the first cam (1) is rotatably installed on the third column (41), the outer side of the first cam (1) is provided with a sliding groove, the first cam roller (7) is rolled in the sliding groove, the first cam roller (7) is rolled in one end of the first L-shaped slide bar (10), The other end of the first L-shaped slide bar (10) is slidably connected to one end of the second L-shaped slide bar (22) via a cross slider (11). The other end of the second L-shaped slide bar (22) is slidably connected to a second cam roller (23). The second cam roller (23) is slidably connected to a second cam (24). The second cam (24) is driven to rotate by a third motor (38). The third motor (38) is fixed on a linear ratchet mechanism. A rotary cylinder (13) is fixedly connected to the cross slider (11). The rotary cylinder (13) is bolted to the blade mounting plate (16). The blade mounting plate (16) is fixedly connected to the slicing blade (15). The slicing direction of the slicing blade (15) is set along the length of the bamboo (17). The rotary cylinder (13) controls the angle between the blade mounting plate (16) and the slicing blade (15) and the horizontal plane. The rotary cylinder (13) causes the slicing blade (15) to rotate and tilt towards the outside of the bamboo (17). The first L-shaped slide bar (10) is slidably mounted on the first column (2) via the first fixed slider (8). The two ends of the first fixed slider (8) are fixed on the first column (2) by screws (9) so that the first L-shaped slide bar (10) slides horizontally. The second L-shaped slide bar (22) is slidably mounted on the second column (28) via the second fixed slider (21). The two ends of the second fixed slider (21) are fixed on the second column (28) by screws (9) so that the second L-shaped slide bar (22) slides vertically. The cross slider (11) is fixedly mounted on the side near the bamboo by bolts with a mounting plate (12). The rotary cylinder (13) is fixed on the mounting plate (12) by bolts. The blade mounting plate (16) is connected to the rotary cylinder (13) by bolts. The slicing blade (15) is bolted to the blade mounting plate (16). The rotary cylinder (13) has a cylinder air pipe (14). Both the first cam (1) and the second cam (24) are disc cams; The function of the first cam (1) is to give the cross slider (11) an upward motion trajectory, and the function of the second cam (24) is to give the cross slider (11) a forward motion trajectory. The first cam (1) rotates under the drive of the first motor (6), and the stroke begins. The second cam (24) rotates under the drive of the third motor (38), and the stroke begins. The first cam roller (7) moves on the circular trajectory with a smaller diameter on the first cam (1), and the second cam roller (23) moves on the circular trajectory with a larger diameter on the second cam (24). The motion trajectory of the cross slider (11) is a straight line motion from the head end to the tail end of the bamboo material (17). The spacing on the cross slider (11) is continuous. The slicing blade (15) cuts from the head end to the tail end of the bamboo (17). When the first cam roller (7) contacts the large diameter circular track of the first cam (1), and the second cam roller (23) contacts the small diameter circular track of the second cam (24), the movement trajectory of the cross slider (11) is to move upward in an arc from the tail end of the bamboo (17) back to the head end of the bamboo (17). At this time, the cross slider (11) will return to the initial position of the head end of the bamboo (17). During the arc movement of the cross slider (11), the slicing stroke of the other set of slicing devices moves in a straight line. The slicing of the two sets of slicing devices can be completely avoided, thereby realizing the continuous multiple slicing of the bamboo (17).

2. The radial bamboo sheet unit preparation apparatus according to claim 1, characterized in that: The clamping and fixing device includes two baffles, namely baffle a and baffle b. Baffle a is fixed on the worktable (20), and baffle b is slidably connected to the worktable (20) by a spring (18). One end of the spring (18) is fixedly connected to baffle b, and a handle (19) is fixedly connected to baffle b. The other end of the spring (18) is fixedly connected to the worktable (20).

3. The radial bamboo sheet unit preparation apparatus according to claim 1, characterized in that: The planing stroke control mechanism includes a four-bar linkage and a linear ratchet mechanism.

4. The radial bamboo sheet unit preparation apparatus according to claim 3, characterized in that: The four-bar linkage includes a driving rod (45-0), a first driven rod (45-1), a second driven connecting rod (45-2), and a driving pawl (45-3). One end of the driving rod (45-0) is fixedly connected to the connecting rod (33) via a first hinge (45-4). The other end of the driving rod (45-0) is rotatably mounted on the second column (28) via a second hinge (45-5) and one end of the first driven rod (45-1). The other end of the first driven rod (45-1) is connected to one end of the second driven connecting rod (45-2) and one end of the driving pawl (45-3) via a third hinge (45-6). The other end of the second driven connecting rod (45-2) is rotatably mounted on the second column (28) via a fourth hinge (45-7). The other end of the driving pawl (45-3) is... One end engages with a ratchet (51), and a pawl spring (44) is installed between the second driven link (45-2) and the drive pawl (45-3) near the connection end; a third sprocket (34) is fixedly installed at one end of the link (33), and the third sprocket (34) is connected to the fourth sprocket (36) through chain b (35). The fourth sprocket (36) is fixedly installed on the output shaft of the second motor (37), and the second motor (37) is fixed on the lower side of the worktable (20); a check pawl (26) is engaged with the other side of the ratchet (51) relative to the drive pawl (45-3), and the check pawl (26) is installed on the base (39) through a check pawl hinge (27). A check pawl spring is also connected between the check pawl (26) and the base (39).

5. The radial bamboo sheet unit preparation apparatus according to claim 3, characterized in that: The linear ratchet mechanism includes a transmission belt (50), ratchet teeth (51) disposed on the outer periphery of the transmission belt, and internal teeth (52) disposed on the inner periphery of the transmission belt. The internal teeth (52) on the inner side of the transmission belt (50) mesh with two gears, namely an upper gear (53-1) located at the upper position and a lower gear (53-2) located at the lower position. The gear shaft (54) of the gear is rotatably mounted on the second column (28). A third motor (38) is fixedly mounted on the transmission belt. The output shaft of the third motor (38) passes through the second cam (24) and is rotatably connected to a sleeve (48). The lower side of the sleeve (48) is fixed to the top of the support spring (47). The bottom end of the support spring (47) is slidably connected to the third slider (46). The third slider (46) is slidably disposed in a sliding groove opened on the base (39). The sliding groove is opened along the rotation direction of the ratchet teeth (51).

6. A method for manufacturing radial bamboo sheet composite pressed material, characterized in that: The method includes: S1. Using the radial bamboo sheet unit preparation device according to any one of claims 1-5, bamboo material (17) is sliced ​​to obtain radial bamboo sheets, and then radial bamboo sheet units are obtained by weighing and quantitatively measuring. The quantitative radial bamboo sheet units are then shaped into clump-shaped bamboo sheet units, and finally the clump-shaped bamboo sheet units are dried at 60-100℃ until the moisture content reaches 8%-15%. S2. The dried, lumpy bamboo sheet units are impregnated with phenolic resin adhesive with a solid content of 18%, and then dried again at 60°C until the moisture content reaches 8%-15%, to obtain lumpy, impregnated bamboo sheet units; the impregnation amount of the lumpy, impregnated bamboo sheet units is controlled at 6%-12%; S3. Arrange the obtained clump-shaped impregnated bamboo sheet units in an orderly manner, with the clump-shaped impregnated bamboo sheet units interspersed between adjacent rows. Use radial bamboo sheets to fill the edges, and then pre-press. If the board obtained after pre-pressing shows obvious density unevenness, add impregnated radial bamboo sheets and then pre-press again. S4. The pre-pressed, uniformly dense board is hot-pressed into shape, then cut, cooled and post-treated to obtain radial bamboo sheet composite pressed material.

7. The method for manufacturing radial bamboo sheet composite pressed material according to claim 6, characterized in that: The hot pressing temperature described in S4 is 135-150℃. The hot pressing process is a hot pressing process dominated by the thickness of the slab. The hot pressing time is determined according to the thickness of the slab after pre-pressing and the thickness of the slab after hot pressing. Each millimeter of compressed thickness is maintained for 40-60 seconds of hot pressing.

8. The method for manufacturing radial bamboo sheet composite pressed material according to claim 7, characterized in that: The bamboo slivers in S1 have a thickness range of 0.3mm-1.2mm and a length of 500-1000mm; the bamboo material has a length of 500-1000mm.

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