A method for secondary reorganization, paving and pressing of multi-layer cross-laminated reorganized bamboo

Abstract

This invention discloses a method for the secondary reconstituted bamboo plywood installation and pressing using a multi-layered, cross-laminated structure. The method employs a splicing assembly to connect at least two reconstituted bamboo panels. The splicing assembly includes positioning posts and a bonding plate. Symmetrical semi-circular grooves are provided on both sides of the panels, with positioning posts engaging inside these grooves. The positioning posts pre-align the two panels, ensuring alignment accuracy during the cross-laminated splicing of multiple layers and preventing misalignment from affecting the structural stability after pressing. The bonding plate locks the positioning posts to the panels, maintaining the stability of each component during adhesive curing and preventing displacement or loosening during the curing stage. Through the cross-laminated arrangement of multiple reconstituted bamboo unit panels, the structural deficiency of traditional reconstituted bamboo panels, which can only bear weight in one direction, is completely solved. The flexural and compressive strength in both the longitudinal and transverse directions of the grain are significantly improved, achieving bidirectional uniform stress distribution.

Description

Technical Field

[0001] This invention belongs to the field of reconstituted bamboo technology, specifically relating to a method for secondary reconstituted bamboo paving and pressing using a multi-layered, cross-laminated reconstituted bamboo. Background Technology

[0002] Reconstituted bamboo, as a high-performance bamboo-based composite material, has been widely used in building structures, interior and exterior decoration, and furniture manufacturing in recent years. Its basic principle is to treat bamboo fibers, impregnate them with adhesives, and then process them through drying, assembly, hot pressing, and other processes to produce high-density, high-strength board products.

[0003] Current technologies for assembling reconstituted bamboo panels mostly rely on manual visual inspection for layer-by-layer alignment, which can easily lead to relative slippage between layers and misalignment. Once misalignment occurs, it not only disrupts the continuity of the internal fiber structure of the panel, affecting the load transfer path, but also causes localized stress concentration during subsequent pressing, ultimately reducing the overall structural stability and load-bearing capacity of the reconstituted panel. Furthermore, unidirectional reconstituted bamboo panels have significant structural limitations. Due to the anisotropic biological characteristics of bamboo, its elastic modulus and strength along the grain are much higher than those across the grain, resulting in severely insufficient mechanical properties in the cross-grain direction for unidirectionally laid reconstituted bamboo panels, enabling only unidirectional load-bearing. Summary of the Invention

[0004] The purpose of this invention is to provide a method for the secondary reconstituted paving and pressing of multi-layered cross-laminated reconstituted bamboo, so as to solve the problems of structural strength and paving method of reconstituted bamboo in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A method for paving multiple layers of reconstituted bamboo using a cross-laminated design is disclosed. This method employs splicing components to assemble at least two reconstituted bamboo panels. Each splicing component includes positioning posts and bonding panels. Semicircular grooves are symmetrically arranged on both sides of the panels, with positioning posts engaging inside the semicircular grooves. Grooves are machined on the sides of the panels, and side holes are formed at the center of the arc of each semicircular groove, extending through the grooves. A forward groove connects the semicircular grooves and the grooves. The positioning post has symmetrical main grooves in the front-to-back direction and symmetrical side grooves in the left-to-right direction. The side grooves correspond to the side holes, and the main grooves correspond to the forward grooves. The groove is fitted with a bonding plate, and the bonding plate is symmetrically provided with positioning rods on both sides. The bonding plate is symmetrically provided with a main block in the middle. The positioning rods are simultaneously inserted into the side groove and the side hole, and the main block is simultaneously inserted into the forward groove and the main groove.

[0006] Preferably, a guide block is provided on the side of the semi-circular groove, the guide block is located on the side opposite to the positive groove, and the main groove on either the front or rear side of the positioning post is inserted into the guide block.

[0007] Preferably, there are three side grooves and two main grooves, and the side grooves and main grooves are staggered with each other along the axial projection direction of the positioning column.

[0008] Preferably, the positioning column has a central hole concentrically formed inside, and the inner wall of the central hole has a liquid outlet hole.

[0009] Preferably, the liquid outlet is connected to both the side tank and the main tank.

[0010] Preferably, the following installation steps are included: S1. Single-sided plate alignment and assembly: Take a plate and insert the positioning post into the semi-circular groove on the side of the plate; the positioning post forms a sliding assembly with the guide block on the outside of the semi-circular groove through its own main groove, so that the positioning post and the semi-circular groove are concentrically positioned, and at the same time, the side groove of the positioning post corresponds one-to-one with the side hole of the plate, and the main groove of the positioning post corresponds one-to-one with the front groove of the plate. S2. Double-sided plate assembly: Take another plate and, following the assembly alignment method in step S, install the plate on the other side of the positioning post. The positioning post is precisely aligned with the semi-circular groove, side hole, and forward groove of the two plates through the structure at both ends of the positioning post, so that the two plates can be pre-assembled and connected with the positioning post as the intermediate connecting part. S3, Center Injection and Penetration Reinforcement: The center hole opened at the center position of the positioning column is filled with adhesive. The filled adhesive penetrates outward through the liquid outlet hole on the inner wall of the center hole and flows evenly into the assembly gap of the semi-circular groove and the interior of the side groove and the main groove to complete the adhesive wetting treatment of each assembly contact surface. S4. Adhesive Plate Pressing and Limiting Assembly: Take an adhesive plate that matches the groove of the plate, align the positioning rods on both sides of the adhesive plate with the side holes of the plate, and align the main block in the middle of the adhesive plate with the front groove of the plate; press the adhesive plate inward so that the positioning rods are simultaneously embedded into the side holes and the side grooves of the positioning posts, and the main block is simultaneously embedded into the front groove and the main groove of the positioning posts, thereby achieving overall limiting and locking of the adhesive plate, the two plates and the positioning posts; S5. Curing and Molding Completed Installation: Keep the overall assembly and positioning structure unchanged. Wait for the glue filling the center hole to completely solidify and cure, so that the board, positioning post and bonding board form a stable overall structure, and complete the installation of a single set of reconstituted bamboo boards. Repeat the above steps to complete the overall multi-layer cross-sectional reconstituted bamboo secondary reconstituted installation operation.

[0011] Preferably, in step S3, the liquid outlet is connected to the side groove and the main groove respectively. After the glue flows out through the liquid outlet, it wets the mating surfaces and gaps of the side groove and the side hole, and the main groove and the forward groove.

[0012] A method for secondary reconstituted pressing of multi-layered cross-laminated reconstituted bamboo, wherein the board comprises two or more unit boards, includes the following steps: S1. Prepare multi-layer bamboo unit boards, predetermine the texture direction of each layer of bamboo unit boards, and uniformly set the texture direction of each layer of bamboo unit boards to a single direction of vertical or horizontal lines. S2. Perform surface pretreatment on all bonding surfaces of the reconstituted bamboo unit boards to remove impurities, burrs and stains from the bonding surfaces and ensure that the bonding surfaces are flat and clean. S3. Apply adhesive evenly to the pre-treated bonding surface of each reconstituted bamboo unit board, control the amount of adhesive to be applied evenly and ensure that the bonding surface is completely covered by adhesive. S4. Stack the layers of bamboo unit boards in an alternating perpendicular stacking manner according to the texture direction of adjacent layers, so that the angle between the texture directions of two adjacent layers of bamboo unit boards is 90°, to form a multi-layered crisscrossing composite blank structure; the composite blank is composed of two or more layers of bamboo unit boards stacked together, with the texture direction of each layer of bamboo unit boards arranged alternately perpendicularly. S5. Pressurize and cure the stacked composite blanks to fully cure the adhesive and firmly bond each layer of bamboo unit board into one, finally obtaining a multi-layered cross-laminated bamboo composite board.

[0013] The technical solution of this invention has the following beneficial effects: 1. Pre-assembling and aligning the two boards using positioning posts ensures the alignment accuracy when splicing multiple layers of boards, preventing misalignment from affecting the structural stability after subsequent pressing. The center-injection method allows the adhesive to penetrate evenly into all assembly gaps, eliminating the need for additional surface adhesive application, simplifying the adhesive application process, and ensuring uniform bonding. The structure of the bonding board locking positioning posts to the boards maintains the stability of each component during the adhesive curing process, preventing displacement and loosening during the curing stage, effectively improving the overall structural strength of the boards after secondary reassembly, and meeting the installation and processing requirements of multi-layer cross-laminated bamboo.

[0014] 2. By using a multi-layered, crisscrossing arrangement of bamboo unit boards, the structural limitation of traditional bamboo boards, which can only bear weight in one direction, is completely solved. The flexural and compressive strength in both the longitudinal and transverse directions of the grain are significantly improved, achieving uniform stress distribution in both directions and greatly expanding the application scenarios of the board. The multi-layered, crisscrossing structure effectively offsets the uneven internal stress caused by differences in bamboo fiber orientation, reducing warping, deformation, and cracking problems caused by environmental changes. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a cross-sectional installation diagram of the present invention.

[0018] Figure 3 This is a disassembled assembly diagram of the bonding plate of the present invention.

[0019] Figure 4 This is a schematic diagram of the groove plane of the present invention.

[0020] Figure 5 This is a disassembled assembly diagram of the positioning column of the present invention.

[0021] Figure 6 This is a schematic diagram of the installation of the positioning post according to the present invention.

[0022] Figure 7 This is a schematic diagram of the bonding plate structure of the present invention.

[0023] Figure 8 This is a diagram showing the state of the sheet metal before pressing according to the present invention.

[0024] Figure 9 This is a photograph showing the changes in the sheet metal before and after pressing according to the present invention.

[0025] Figure 10 This is a flowchart of the pressing method of the present invention.

[0026] Reference numerals: 40, plate; 401, semi-circular groove; 402, side hole; 403, groove; 404, forward groove; 405, guide block; 50, positioning post; 501, center hole; 502, side groove; 503, main groove; 504, liquid outlet; 60, bonding plate; 601, positioning rod; 602, main block. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0028] Example 1: refer to Figures 1-7 ,refer to Figure 5 The coordinate system (front, back, left, right) directions in the middle. A method for secondary reconstituted bamboo paving using a multi-layered, interlocking structure, employs splicing components to pave at least two reconstituted bamboo panels 40. The splicing components include positioning posts 50 and bonding panels 60. Semicircular grooves 401 are symmetrically provided on both sides of the panels 40, with the positioning posts 50 engaging inside the semicircular grooves 401. Grooves 403 are machined on the sides of the panels 40, and side holes 402 are opened on the arc-shaped center surface of the semicircular grooves 401, extending through the grooves 403. A central connection is established between the semicircular grooves 401 and the grooves 403. The positioning post 50 has a main groove 503 symmetrically arranged in the front and rear directions of the groove 404 and a side groove 502 symmetrically arranged in the left and right directions of the positioning post 50. The side groove 502 corresponds to the side hole 402, and the main groove 503 corresponds to the forward groove 404. The groove 403 is fitted with a bonding plate 60. The bonding plate 60 has positioning rods 601 symmetrically arranged on both sides of the bonding plate 60 and a main block 602 symmetrically arranged in the middle of the bonding plate 60. The positioning rods 601 are inserted into the side groove 502 and the side hole 402 at the same time, and the main block 602 is inserted into the forward groove 404 and the main groove 503 at the same time.

[0029] In this embodiment of the invention, four semi-circular grooves 401 are symmetrically distributed in a single plate 40. When two plates 40 are spliced ​​together, the semi-circular grooves 401 in the two plates 40 combine to form a complete circle for accommodating the installation of the positioning post 50. After the corresponding two plates 40 are spliced, the grooves 403 in the two plates 40 also combine to form a size that fits the bonding plate 60. The positioning post 50 serves as a connector between the two plates 40. By installing the bonding plate 60, the positioning rod 601 is simultaneously inserted into the side groove 502 and the side hole 402. The positioning rod 601 provides a vertical locking force to prevent the positioning post 50 from detaching from the plate 40. The main block 602 is simultaneously inserted into the forward groove 404 and the main groove 503. Similarly, the main block 602 further provides a vertical locking force, completing the locking between the two plates 40 and the positioning post 50 and preventing the positioning post 50 from shifting in the vertical direction. The multi-locking structure can stably fix the position of the spliced ​​board 40, prevent misalignment at the splice, and ensure the stability of the overall structure after the board 40 is laid. Moreover, the splicing process only requires insertion and positioning, and the laying operation is simple.

[0030] Preferred reference Figures 3-6 The semi-circular groove 401 has a guide block 405 on its side. The guide block 405 is located on the side opposite to the positive groove 404. The main groove 503 on either side of the positioning post 50 is inserted into the guide block 405.

[0031] In the preferred embodiment of this invention, the positioning post 50 is a cylindrical structure, which is prone to rolling when installed inside the semi-circular groove 401. Furthermore, the installation of the positioning post 50 requires aligning the side groove 502 with the side hole 402 and the main groove 503 with the forward groove 404. Therefore, to improve the alignment speed during installation, a guide block 405 is slidably inserted into the main groove 503. This allows for rapid positioning and installation of the positioning post 50. It is only necessary to align the main groove 503 on either side of the positioning post 50 with the guide block 405, eliminating the need to distinguish between the front and back directions of the positioning post 50. This reduces the difficulty of installation alignment and effectively improves the efficiency of splicing and paving operations. Simultaneously, after the guide block 405 is inserted into the main groove 503, it also restricts the rotation of the positioning post 50, preventing misalignment within the semi-circular groove 401 and further enhancing the overall stability of the splicing structure.

[0032] refer to Figures 3-7 There are three side grooves 502 and two main grooves 503. The side grooves 502 and the main grooves 503 are staggered along the axial projection direction of the positioning post 50.

[0033] In this invention, since the side grooves 502 and the main grooves 503 are symmetrically distributed, there are three side grooves 502 on one side and two main grooves 503 on one side. Therefore, there are six mirror-symmetrical side grooves 502 and four main grooves 503. Two main grooves 503 on the same side are used to fit the guide block 405, while the two main grooves 503 on the other side are used to fit the main block 602. Thus, there are two main blocks 602 on the bonding plate 60. The six side grooves 502 are symmetrically connected to six positioning rods 601. The staggered distribution of the side grooves 502 and the main grooves 503 is to avoid mutual interference.

[0034] refer to Figure 6 The positioning column 50 has a concentric central hole 501, and the inner wall of the central hole 501 has a liquid outlet hole 504. The liquid outlet hole 504 is connected to the side groove 502 and the main groove 503 respectively.

[0035] In this implementation scheme, glue is filled inside the central hole 501, and the glue can diffuse outward through the outlet hole 504. This fills the connection gap between the positioning rod 601 and the main block 602, improving the structural connection strength of the spliced ​​parts and preventing cracking and detachment at the splicing seams after the bamboo materials are spliced. After filling the gaps, the glue can form an adhesive layer anchoring at the contact points, further strengthening the bond between the positioning rod 601 and the side groove 502, and between the main block 602 and the main groove 503. This ensures the overall structural stability of the reconstituted bamboo after splicing and meets the strength requirements of the board after secondary reconstituted pressing.

[0036] Installation steps: S1. Single-sided plate alignment and assembly: Take a plate 40 and insert the positioning post 50 into the semi-circular groove 401 on the side of the plate 40; the positioning post 50 forms a sliding assembly fit with the guide block 405 on the outside of the semi-circular groove 401 through its own main groove 503, so that the positioning post 50 and the semi-circular groove 401 are concentrically positioned, and at the same time, the side groove 502 of the positioning post 50 corresponds one-to-one with the side hole 402 of the plate 40, and the main groove 503 of the positioning post 50 corresponds one-to-one with the forward groove 404 of the plate 40. S2. Double-sided plate assembly: Take another plate 40 and, following the assembly alignment method in step S1, install the plate 40 on the other side of the positioning post 50. The positioning post 50 is precisely aligned with the semi-circular groove 401, side hole 402, and forward groove 404 of the two plates 40 through the structure at both ends of the positioning post 50, so that the two plates 40 can be pre-assembled and connected with the positioning post 50 as the intermediate connecting part. S3. Center injection and penetration reinforcement: Fill the center hole 501 opened at the center position of the positioning column 50 with adhesive. The filled adhesive penetrates outward through the liquid outlet 504 on the inner wall of the center hole 501 and flows evenly into the assembly gap of the semi-circular groove 401 and the interior of the side groove 502 and the main groove 503 to complete the adhesive wetting treatment of each assembly contact surface. S4. Pressing and limiting assembly of the bonding plate 60: Take the bonding plate 60 that matches the groove 403 of the plate 40, align the positioning rods 601 on both sides of the bonding plate 60 with the side holes 402 of the plate 40, and align the main block 602 in the middle of the bonding plate 60 with the forward groove 404 of the plate 40; press the bonding plate 60 inward so that the positioning rods 601 are simultaneously embedded in the side holes 402 and the side grooves 502 of the positioning post 50, and the main block 602 is simultaneously embedded in the forward groove 404 and the main groove 503 of the positioning post 50, thereby achieving overall limiting and locking of the bonding plate 60, the double plate 40 and the positioning post 50; S5. Curing and Molding Completed: Keep the overall assembly and limiting structure unchanged. Wait for the glue filling the center hole 501 to completely solidify and cure, so that the board 40, positioning post 50 and bonding board 60 form a stable overall structure, and complete the single set of reconstituted bamboo board installation. Repeat the above steps to complete the overall multi-layer longitudinal and transverse reconstituted bamboo secondary reconstituted installation operation.

[0037] In the installation method of this invention, the positioning post 50 is used to pre-assemble and align the two boards 40, which can ensure the alignment accuracy when the multi-layer boards 40 are spliced ​​in an interlaced manner, and avoid the misalignment of the boards 40 affecting the structural stability after subsequent pressing. The center injection method allows the glue to penetrate evenly into all assembly gaps, eliminating the need for additional surface glue application, simplifying the glue application process, and ensuring uniform bonding. The structure of the bonding board 60 locking the positioning post 50 and the board 40 can maintain the stability of the position of each component during the glue curing process, preventing displacement and loosening during the curing stage, effectively improving the overall structural strength of the board 40 after secondary reassembly, and meeting the installation and processing requirements of multi-layer interlaced reassembled bamboo.

[0038] In step S3, the liquid outlet 504 is connected to the side groove 502 and the main groove 503 respectively. After the glue flows out through the liquid outlet 504, it wets the mating surfaces and gaps of the side groove 502 and the side hole 402, and the main groove 503 and the forward groove 404.

[0039] Example 2: refer to Figures 8-10 A method for secondary reconstituted pressing of multi-layered cross-laminated bamboo, wherein the board 40 comprises two or more unit boards, includes the following steps: S1. Prepare multi-layer bamboo unit boards, predetermine the texture direction of each layer of bamboo unit board, and uniformly set the texture direction of each bamboo unit board to a single direction of vertical or horizontal lines. S2. Perform surface pretreatment on all bonding surfaces of the reconstituted bamboo unit boards to remove impurities, burrs and stains from the bonding surfaces and ensure that the bonding surfaces are flat and clean. S3. Apply adhesive evenly to the pre-treated bonding surface of each reconstituted bamboo unit board, control the amount of adhesive to be applied evenly and ensure that the bonding surface is completely covered by adhesive. S4. Stack the layers of bamboo unit boards in an alternating perpendicular stacking manner according to the texture direction of adjacent layers, so that the angle between the texture directions of two adjacent layers of bamboo unit boards is 90°, thus constructing a multi-layered crisscrossing composite body structure; the composite body is composed of two or more layers of bamboo unit boards stacked together, with the texture direction of each layer of bamboo unit boards arranged alternately perpendicularly. S5. Pressurize and cure the stacked composite blanks to fully cure the adhesive and firmly bond each layer of bamboo unit board into one, finally obtaining a multi-layered cross-laminated bamboo composite board.

[0040] In the pressing method of this invention, the number of layers of the reconstituted bamboo unit board is two or more, and the texture arrangement is an alternating structure of "vertical grain - horizontal grain - vertical grain..." or "horizontal grain - vertical grain - horizontal grain...". The adhesive used needs to be a cold-press-compatible irreversible chemical bonding adhesive, which forms irreversible chemical bonds after curing, such as water-based isocyanate adhesive or phenolic resin adhesive, to ensure structural strength. Through the crisscross arrangement of multiple layers of reconstituted bamboo unit boards, the structural defect of traditional reconstituted bamboo boards that can only bear weight in one direction is completely solved. The flexural strength and compressive strength of the board in both the longitudinal and transverse directions are significantly improved, achieving bidirectional uniform stress and greatly expanding the application scenarios of the board. The multi-layered crisscross structure can effectively offset the uneven internal stress caused by the difference in bamboo fiber direction, reducing warping, deformation, and cracking problems caused by environmental changes.

[0041] The specific implementation process of this invention is as follows: 1. Pre-assembly and alignment The positioning post 50 is used as an intermediate connector. During installation, the guide block 405 on the side of the semi-circular groove 401 of the plate slides into the main groove 503 on the positioning post to achieve rapid coarse positioning. This not only prevents the positioning post 50 from rolling, but also ensures that its side groove 502 is precisely aligned with the side hole 402 of the plate, and the main groove 503 is precisely aligned with the forward groove 404 of the plate, providing a unified positioning reference for the docking of the two plates 40.

[0042] 2. Mechanical locking After the two panels 40 are joined together with the positioning post 50 as the center, the bonding plate 60 is installed. The positioning rods 601 on both sides of the bonding plate 60 are simultaneously inserted into the side holes 402 and the side grooves 502, and the main block 602 in the middle is simultaneously inserted into the forward groove 404 and the main groove 503. These two insertion actions provide a vertical locking force, radially locking the positioning post 50 within the panel 40, preventing it from shifting or rotating in the vertical direction, thereby ensuring that the joint will not be misaligned due to external forces.

[0043] 3. Center glue injection After the mechanical structure is initially locked, adhesive is injected into the central hole 501 of the positioning post 50. The adhesive permeates evenly outward through the outlet hole 504 on the inner wall, automatically filling all assembly gaps and contact surfaces such as the side groove 502, main groove 503, and semi-circular groove 401. This method replaces surface coating, ensuring uniform coverage of the adhesive and forming an adhesive layer for anchoring on the contact surface after curing.

[0044] 4. Curing and molding During the adhesive curing process, the multi-locking structure formed by the bonding board 60 and the positioning post 50 continuously maintains the stability of each component's position, preventing displacement and loosening during the curing shrinkage stage. After the adhesive is fully cured, the board 40, positioning post 50, and bonding board 60 fuse into a stable whole, ultimately meeting the strength and stability requirements of multi-layered cross-laminated bamboo after secondary recombination and pressing.

[0045] The above embodiments are merely exemplary models of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Various modifications or equivalent substitutions can be made to the present invention within its spirit and scope of protection. Such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

[0046] In the description of this invention, it should be noted that the terms "inner," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the appended circle, or the orientation or positional relationship in which the product of this invention is conventionally placed during use. They are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, these terms indicating orientation or positional relationships should not be construed as limitations on the invention.

[0047] In the description of this invention, it should be further noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, these terms can refer to a fixed connection, a detachable connection, or an integral connection between elements; they can also refer to a mechanical connection or an electrical connection; or they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances.

Claims

1. A method for secondary reconstituted bamboo paving using a multi-layered, interlaced structure, characterized in that: This method uses a splicing component to achieve the splicing of at least two reconstituted bamboo boards (40). The splicing component includes a positioning post (50) and a bonding board (60). The boards (40) are symmetrically provided with semi-circular grooves (401) on both sides. The positioning post (50) is snapped into the semi-circular groove (401). The sides of the boards (40) are processed with grooves (403). The center surface of the semi-circular groove (401) is provided with a side hole (402). The side hole (402) extends through the groove (403). A forward groove (404) connects the semi-circular groove (401) and the groove (403). The positioning post (50) is symmetrically provided with a main groove (503) in the front-to-back direction, and the positioning post (50) is symmetrically provided with a side groove (502) in the left-to-right direction. The side groove (502) corresponds to the side hole (402), and the main groove (503) corresponds to the forward groove (404). The groove (403) is fitted with a bonding plate (60), and the bonding plate (60) is symmetrically provided with positioning rods (601) on both sides. The bonding plate (60) is symmetrically provided with a main block (602) in the middle. The positioning rods (601) are simultaneously inserted into the side groove (502) and the side hole (402), and the main block (602) is simultaneously inserted into the forward groove (404) and the main groove (503).

2. The method for secondary reconstituted bamboo paving with a multi-layered, interlaced structure according to claim 1, characterized in that: The semi-circular groove (401) is provided with a guide block (405) on its side. The guide block (405) is located on the side opposite to the positive groove (404). The main groove (503) on either the front or rear side of the positioning post (50) is inserted into the guide block (405).

3. The method for secondary reconstituted bamboo paving with a multi-layered, cross-laminated structure according to claim 2, characterized in that: There are three side grooves (502) and two main grooves (503). The side grooves (502) and the main grooves (503) are staggered along the axial projection direction of the positioning post (50).

4. The method for secondary reconstituted bamboo paving with a multi-layered, interlaced structure according to claim 3, characterized in that: The positioning column (50) has a central hole (501) concentrically formed inside, and the inner wall of the central hole (501) has a liquid outlet hole (504).

5. The method for secondary reconstituted bamboo paving with a multi-layered, interlaced structure according to claim 4, characterized in that: The liquid outlet (504) is connected to the side tank (502) and the main tank (503) respectively.

6. The method for secondary reconstituted bamboo paving with a multi-layered, interlaced structure according to claim 5, characterized in that: The following installation steps are included: S1. Single-sided plate alignment assembly: Take a plate (40) and insert the positioning post (50) into the semi-circular groove (401) on the side of the plate (40); the positioning post (50) forms a sliding assembly fit with the guide block (405) on the outside of the semi-circular groove (401) through its own main groove (503), so that the positioning post (50) and the semi-circular groove (401) are concentrically positioned, and at the same time, the side groove (502) of the positioning post (50) corresponds one-to-one with the side hole (402) of the plate (40), and the main groove (503) of the positioning post (50) corresponds one-to-one with the front groove (404) of the plate (40); S2, Double-sided plate assembly: Take another plate (40) and install it on the other side of the positioning post (50) according to the assembly alignment method in step S1. The positioning post (50) is precisely aligned with the semi-circular groove (401), side hole (402) and forward groove (404) of the two plates (40) through the structure at both ends of the positioning post (50), so that the two plates (40) can be pre-assembled and connected with the positioning post (50) as the intermediate connecting part. S3, Central Injection and Penetration Reinforcement: The central hole (501) opened at the axial position of the positioning column (50) is filled with adhesive. The filled adhesive penetrates outward through the liquid outlet (504) on the inner wall of the central hole (501) and flows evenly into the assembly gap of the semi-circular groove (401) and the interior of the side groove (502) and the main groove (503) to complete the adhesive wetting treatment of each assembly contact surface. S4. Pressing and limiting assembly of the bonding plate (60): Take the bonding plate (60) that matches the groove (403) of the plate (40), align the positioning rods (601) on both sides of the bonding plate (60) with the side holes (402) of the plate (40), and align the main block (602) in the middle of the bonding plate (60) with the positive groove (404) of the plate (40); Press the bonding plate (60) inward so that the positioning rod (601) is simultaneously embedded in the side hole (402) and the side groove (502) of the positioning post (50), and the main block (602) is simultaneously embedded in the forward groove (404) and the main groove (503) of the positioning post (50), thereby realizing the overall limiting and locking of the bonding plate (60), the double plate (40) and the positioning post (50); S5. Curing and molding to complete the paving: Keep the overall assembly and limiting structure unchanged, and wait for the glue filling the center hole (501) to completely solidify and cure, so that the board (40), positioning post (50) and bonding board (60) form a stable overall structure, and complete the single set of reconstituted bamboo board paving. Repeat the above steps to complete the overall multi-layer longitudinal and transverse reconstituted bamboo secondary reconstituted paving operation.

7. The method for secondary reconstituted bamboo paving with a multi-layered, cross-laminated structure according to claim 6, characterized in that: In step S3, the liquid outlet (504) is connected to the side groove (502) and the main groove (503) respectively. After the glue flows out through the liquid outlet (504), it wets the mating surfaces and gaps of the side groove (502) and the side hole (402), and the main groove (503) and the forward groove (404).

8. A method for secondary recombination and pressing of multi-layered, cross-laminated reconstituted bamboo, applied to the paving method described in any one of claims 1-7, characterized in that, The board material (40) comprises two or more unit boards, including the following steps: S1. Prepare multi-layer bamboo unit boards, predetermine the texture direction of each layer of bamboo unit boards, and uniformly set the texture direction of each layer of bamboo unit boards to a single direction of vertical or horizontal lines. S2. Perform surface pretreatment on all bonding surfaces of the reconstituted bamboo unit boards to remove impurities, burrs and stains from the bonding surfaces and ensure that the bonding surfaces are flat and clean. S3. Apply adhesive evenly to the pre-treated bonding surface of each reconstituted bamboo unit board, control the amount of adhesive to be applied evenly and ensure that the bonding surface is completely covered by adhesive. S4. Stack the layers of bamboo unit boards in an alternating perpendicular stacking manner according to the texture direction of adjacent layers, so that the angle between the texture directions of two adjacent layers of bamboo unit boards is 90°, to form a multi-layered crisscrossing composite blank structure; the composite blank is composed of two or more layers of bamboo unit boards stacked together, with the texture direction of each layer of bamboo unit boards arranged alternately perpendicularly. S5. Pressurize and cure the stacked composite blanks to fully cure the adhesive and firmly bond each layer of bamboo unit board into one, finally obtaining a multi-layered cross-laminated bamboo composite board.

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