Bamboo-plastic plate and design method

Abstract

The invention relates to a bamboo-plastic plate and a design method, and the bamboo-plastic plate is made of a bamboo-plastic composite material and comprises a plate body, reinforcing ribs, side plates and triangular supports. The reinforcing ribs are arranged on the tray body in a staggered mode, the side plates are arranged on the peripheral edge of the tray body, and the triangular supports are arranged between the inner walls of the side plates and the tray body. A bamboo-plastic composite material with high toughness and strong weather resistance is adopted as a main body material of the disc, and a plurality of reinforcing rib structures arranged on the disc body in a staggered manner are combined, so that a stress network with high inertia moment is effectively constructed, and meanwhile, a plurality of triangular supports are additionally arranged in a connecting area of the inner wall of the side plate of the disc and the disc body; and the local rigidity and the fracture resistance of the key part of the disc structure are enhanced, so that the stress concentration effect in the stress process is obviously reduced. Compared with a traditional plywood structure, the bamboo-plastic disc tool has the advantages that the compressive strength of the side plates and the overall deformation control are remarkably improved, the safety redundancy is remarkably improved, higher engineering reliability is achieved, and the bamboo-plastic disc tool is suitable for complex working condition scenes such as medium and heavy load cable transportation.

Description

Technical Field

[0001] This invention relates to the field of cable reel technology, specifically to a bamboo-plastic reel and its design method. Background Technology

[0002] Currently, most widely used cable reels are made of plywood. This type of material has a layered structure, which makes it lightweight and inexpensive, but its overall strength and environmental adaptability are poor.

[0003] Plywood pallets are prone to problems such as delamination, cracking, and deformation due to moisture under humid, outdoor, and high-load conditions. In addition, natural wood has natural defects such as knots, cracks, and uneven fibers, which can cause stress concentration zones to form when the pallets are subjected to bending and compressive loads. This makes the pallets prone to local damage during stacking, collision, and repeated loading and unloading, making it difficult to meet the safety requirements under complex transportation conditions. Summary of the Invention

[0004] The purpose of this invention is to provide a bamboo-plastic tray and its design method, which can significantly improve the compressive strength of the side plate and the overall deformation control, significantly increase the safety redundancy, and have higher engineering reliability, making it suitable for complex working conditions such as medium and heavy-duty cable transportation.

[0005] To achieve the above objectives, according to a first aspect of the present invention, a bamboo-plastic tray is provided, the bamboo-plastic tray being made of bamboo-plastic composite material, the bamboo-plastic tray comprising: Disk body; Reinforcing ribs are staggered on the disc body; Side plates are provided on the peripheral edge of the disc body; A triangular support is provided between the inner wall of the side plate and the disc body.

[0006] Optionally, the number of reinforcing ribs is 30-40, the thickness of the reinforcing ribs is 4mm-8mm, and the thickness of the side plate is 20mm-25mm.

[0007] Optionally, the height of the triangular support is 3mm-10mm, and the width of the base of the triangular support is 2mm-8mm.

[0008] According to a second aspect of the present invention, a method for designing bamboo-plastic trays is provided, comprising the following steps: Obtain the performance parameters of bamboo-plastic composite materials; Based on material properties and operating conditions, an initial structural model of the disc is established, and the original arrangement of disc dimensions, side plate thickness, and reinforcing ribs is set for subsequent optimization calculations. In the initial structural model of the disc, a design space is set, and a topology optimization algorithm is used to determine the optimal distribution of materials in the design space with the goal of minimizing the maximum stress or maximizing the structural stiffness, so as to obtain the suggested location and shape of the stiffeners. Based on the topology optimization results, parametric modeling of the key structure of the disk is carried out to establish an adjustable structural parameter model. Combined with genetic algorithm or particle swarm optimization algorithm, multiple rounds of iterative optimization are carried out on the basis of the structural parameter model. Finite element simulation is called to calculate the stress distribution and deformation under different parameter combinations to determine the optimal parameter combination. Triangular supports were added to the inner wall of the side plate of the disc where high stress concentration was located to form the final structural model of the disc, so as to improve the local stiffness and load-bearing capacity of the edge area of ​​the disc. Based on the final structural model of the disc, a matching mold structure and flow channel venting system are designed, and the molding process parameters are optimized using response surface methodology or orthogonal experimental design. Based on the final structural model and molding process parameters, a disc sample was prepared, and its side plates were subjected to compressive load tests.

[0009] Optionally, the performance parameters of the bamboo-plastic composite material include density, notched beam impact strength, tensile strength, elongation at break, flexural strength, and flexural modulus.

[0010] Optionally, the parameters of the key structure of the disc include the thickness of the disc body, the radius of the disc body, the number of reinforcing ribs, the height and thickness of the reinforcing ribs, the spacing between the reinforcing ribs, and the thickness of the side plates.

[0011] Optionally, the molding process parameters include molding temperature, molding pressure, holding time, and cooling time.

[0012] Optionally, the compression temperature is 160℃-190℃, the compression pressure is 1000t·f-1300t·f, the pressure holding time is 30s-60s, and the cooling time is 60s-120s.

[0013] The beneficial effects of this invention are as follows: by using bamboo-plastic composite material with high toughness and strong weather resistance as the main material of the tray, combined with the multiple reinforcing ribs arranged in an interlaced manner on the tray, a force network with high moment of inertia is effectively constructed. At the same time, multiple triangular supports are added in the connection area between the inner wall of the tray side plate and the tray body to strengthen the local stiffness and fracture resistance of key parts of the tray structure, thereby significantly reducing the stress concentration effect during the stress process. By obtaining the performance parameters of bamboo-plastic composite materials, accurate input data is provided for the initial structural model of the mold. Then, based on the initial structural model, a topology optimization algorithm is introduced to optimize the material distribution and the shape and position of the reinforcing ribs under given working conditions and design space. Then, a parameterized model is established for the key structural parameters of the mold, and the parameter combination is iteratively optimized by combining genetic algorithm or particle swarm optimization algorithm. With the support of simulation analysis, the coordinated optimization of local structural stiffness, overall shape control and weight distribution is achieved. Finally, based on the optimized structural scheme, the mold flow channel, venting system and molding process parameters are optimized accordingly to ensure that the final mold product has excellent molding quality and mechanical properties. Compared to traditional plywood structures, bamboo-plastic trays offer significant improvements in side panel compressive strength and overall deformation control, with a marked increase in safety redundancy and higher engineering reliability, making them suitable for complex working conditions such as medium- and heavy-duty cable transportation.

[0014] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic structural diagram of a bamboo-plastic tray according to an embodiment of the present invention; Figure 2 This is a schematic flowchart illustrating a design method for a bamboo-plastic tray according to an embodiment of the present invention; Figure 3 The diagram shows the test results of the compressive load on the side plates of the original structure. Figure 4 This is a diagram showing the compressive load test results of the side panel of a bamboo-plastic tray according to an embodiment of the present invention; In the diagram: 1. Disc body; 2. Reinforcing rib; 3. Side plate; 4. Triangular support. Detailed Implementation

[0016] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0019] Please see Figure 1 This application discloses a preferred embodiment of a bamboo-plastic tray and its design method. The tray is made of bamboo-plastic composite material and includes a tray body, reinforcing ribs, side plates, and triangular supports. The reinforcing ribs are staggered on the tray body, the side plates are located on the peripheral edges of the tray body, and the triangular supports are located between the inner wall of the side plates and the tray body. Please refer to [link to relevant documentation]. Figure 2 The design method for this bamboo-plastic tray includes the following steps: Step S10: Obtain the performance parameters of the bamboo-plastic composite material; Step S20: Based on material properties and operating conditions, establish an initial structural model of the disc, set the disc size, side plate thickness, and original arrangement of reinforcing ribs for subsequent optimization calculations; Step S30: In the initial structural model of the disc, set the design space, and use the topology optimization algorithm to determine the optimal distribution of materials in the design space with the goal of minimizing the maximum stress or maximizing the structural stiffness, and obtain the suggested position and shape of the stiffeners; Step S40: Based on the topology optimization results, perform parametric modeling of the key structure of the disk, establish an adjustable structural parameter model, and combine genetic algorithm or particle swarm optimization algorithm to perform multiple rounds of iterative optimization on the basis of the structural parameter model. Call finite element simulation to calculate the stress distribution and deformation under different parameter combinations, and determine the parameter combination with optimal performance. Step S50: Add triangular supports to the inner wall of the side plate of the disc where stress concentration is high to form the final structural model of the disc, so as to improve the local stiffness and load-bearing capacity of the edge area of ​​the disc. Step S60: Based on the final structural model of the disc, design a matching mold structure and flow channel venting system, and optimize the molding process parameters using response surface methodology or orthogonal experimental design. Step S70: Prepare a disc sample based on the final structural model and molding process parameters, and conduct a compressive load test on its side plate.

[0020] According to the embodiment of the present invention, by using bamboo-plastic composite material with high toughness and strong weather resistance as the main material of the tray, and combining it with multiple reinforcing ribs arranged in an interlaced manner on the tray body, a force network with high moment of inertia is effectively constructed. At the same time, multiple triangular supports are added in the connection area between the inner wall of the tray side plate and the tray body to strengthen the local stiffness and fracture resistance of key parts of the tray structure, thereby significantly reducing the stress concentration effect during the stress process.

[0021] By obtaining the performance parameters of bamboo-plastic composite materials, accurate input data is provided for the initial structural model of the mold. Then, based on the initial structural model, a topology optimization algorithm is introduced to optimize the material distribution and the shape and position of the reinforcing ribs under given working conditions and design space. Next, a parameterized model is established for the key structural parameters of the mold, and the parameter combination is iteratively optimized by combining genetic algorithm or particle swarm optimization algorithm. With the support of simulation analysis, the coordinated optimization of local structural stiffness, overall shape control and weight distribution is achieved. Finally, based on the optimized structural scheme, the mold flow channel, venting system and molding process parameters are optimized accordingly to ensure that the final mold product has excellent molding quality and mechanical properties.

[0022] Compared to traditional plywood structures, bamboo-plastic trays offer significant improvements in side panel compressive strength and overall deformation control. Compression and compressive strength are increased by 70%, side panel support strength is improved by 100%, safety redundancy is significantly enhanced, and engineering reliability is higher, making them suitable for complex working conditions such as medium- and heavy-duty cable transportation.

[0023] The following detailed description uses specific examples: In step S10, the performance parameters of the bamboo-plastic composite material include density, notched beam impact strength, tensile strength, elongation at break, flexural strength, and flexural modulus. Specifically, in this embodiment, the density of the bamboo-plastic composite material is 1.05-1.1 g / cm³, the notched beam impact strength is not less than 4 KJ / m², the tensile strength is not less than 12 MPa, the elongation at break is 5-8%, the flexural strength is greater than 15 MPa, and the flexural modulus is greater than 1000 MPa.

[0024] In this embodiment, the number of reinforcing ribs is 30-40, the thickness of the reinforcing ribs is 4mm-8mm, and the thickness of the side plate is 20mm-25mm. In step S40, the parameters of the key structure of the disc include the thickness of the disc body, the radius of the disc body, the number of reinforcing ribs, the height and thickness of the reinforcing ribs, the spacing between the reinforcing ribs, and the thickness of the side plate.

[0025] Based on the topology and modeling experiments in steps S30 and S40, the improvement in deformation of the disk with different parameter combinations under stress is shown in the table below: As shown in the table above, comparative analysis of topology and modeling experiments revealed that increasing the thickness of the reinforcing ribs in Scheme 3 significantly improved the deformation of the disc. Considering both material usage and support effect, Scheme 2's disc fixture achieved the best material utilization efficiency while meeting structural stiffness requirements. In this embodiment, the disc fixture structure with a side plate thickness of 22mm, 32 reinforcing ribs, and a reinforcing rib thickness of 6mm was ultimately determined to be the most cost-effective.

[0026] However, although the optimized structure of the aforementioned disc effectively improves the overall strength of the side plate, stress concentration still exists at the edge of the disc, i.e., the outermost region of the side plate, posing a risk of edge breakage during actual transportation and use. To alleviate this stress concentration, in step S50, a support structure is designed and added at the connection between the disc body and the side plate. Considering the requirements of material economy and structural efficiency, a scheme of arranging triangular support units on the inner wall of the side plate is selected. Finite element modeling analysis shows that this triangular support can effectively improve the stress distribution at the outermost end of the side plate, playing a role in dispersing loads and suppressing local breakage, thereby further improving the structural safety and reliability of the disc edge. Specifically, in this embodiment, the height of the triangular support is 3mm-10mm, and the width of the base of the triangular support is 2mm-8mm.

[0027] In step S60, the molding process parameters include molding temperature, molding pressure, holding time, and cooling time. Specifically, in this embodiment, the molding temperature is 160℃-190℃, the molding pressure is 1000t·f-1300t·f, the holding time is 30s-60s, and the cooling time is 60s-120s.

[0028] In the process of manufacturing bamboo-plastic discs using membrane molding, the molding process parameters have a significant impact on the final mechanical properties of the disc products. Appropriate temperature and pressure help the bamboo-plastic melt flow and fill fully, reducing molding defects such as shrinkage cavities and bubbles, and improving the density and mechanical properties of the disc products. However, excessively high temperatures or pressures may trigger thermal degradation of the material, leading to a decline in performance. Holding time and cooling time play a crucial role in the dimensional stability and internal stress distribution of the disc products; too short a time may cause deformation, while too long a time reduces molding efficiency.

[0029] To systematically study the influence of various molding process parameters on the strength of the molded discs, this application employs orthogonal experimental design or response surface methodology to establish a response model between process parameters and mechanical properties. Furthermore, optimization algorithms are used to solve the model, obtaining the parameter combination that optimizes the performance of the molded disc products. For example, optimizing the compression temperature, compression pressure, and holding time using response surface methodology can increase the tensile strength of the molded discs by 10%–15%, significantly enhancing the performance and consistency of the molded disc products.

[0030] Mold structure design has a crucial impact on the molding quality and mechanical properties of bamboo-plastic molds. By rationally optimizing the mold cavity position, heating system, venting system, and runner layout, the uniformity of melt flow within the mold cavity can be improved, flow resistance and temperature difference can be reduced, and molding defects such as air entrapment, overflow, and localized weaknesses can be effectively avoided. A well-designed runner cross-section and venting channel help improve filling efficiency and density, ensuring the structural integrity and mechanical stability of the molded product, thereby significantly improving molding consistency and overall performance.

[0031] To verify the strength and recyclability of the bamboo-plastic composite tray after its structure was determined, compressive load tests were conducted on its side panels. To evaluate the modification effect, a traditional plywood tray was used as a control group. Two corresponding test points were selected on each side of the side panel as loading pressure points for the experiment. The test results are as follows: Figure 3 and Figure 4 As shown.

[0032] from Figure 3 and Figure 4 A comparison of the two sets of curves shows that the modified bamboo-plastic tray exhibits higher compressive strength during compression, with a smoother stress curve and significantly reduced deformation. Compared to the original tray structure, the improved bamboo-plastic tray demonstrates approximately 70% improvement in compressive strength and compressive performance, indicating that optimized structural design has a significant effect on enhancing the overall mechanical properties of the tray.

[0033] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A bamboo-plastic tray, characterized in that, The bamboo-plastic tray is made of bamboo-plastic composite material, and the bamboo-plastic tray includes: Disk body; Reinforcing ribs are staggered on the disc body; Side plates are provided on the peripheral edge of the disc body; A triangular support is provided between the inner wall of the side plate and the disc body.

2. The bamboo-plastic tray according to claim 1, characterized in that, The number of reinforcing ribs is 30-40, the thickness of the reinforcing ribs is 4mm-8mm, and the thickness of the side plate is 20mm-25mm.

3. The bamboo-plastic tray according to claim 1, characterized in that, The height of the triangular support is 3mm-10mm, and the width of the base of the triangular support is 2mm-8mm.

4. A design method for bamboo-plastic trays as described in any one of claims 1 to 3, characterized in that, Includes the following steps: Obtain the performance parameters of bamboo-plastic composite materials; Based on material properties and operating conditions, an initial structural model of the disc is established, and the original arrangement of disc dimensions, side plate thickness, and reinforcing ribs is set for subsequent optimization calculations. In the initial structural model of the disc, a design space is set, and a topology optimization algorithm is used to determine the optimal distribution of materials in the design space with the goal of minimizing the maximum stress or maximizing the structural stiffness, so as to obtain the suggested location and shape of the stiffeners. Based on the topology optimization results, parametric modeling of the key structure of the disk is carried out to establish an adjustable structural parameter model. Combined with genetic algorithm or particle swarm optimization algorithm, multiple rounds of iterative optimization are carried out on the basis of the structural parameter model. Finite element simulation is called to calculate the stress distribution and deformation under different parameter combinations to determine the optimal parameter combination. Triangular supports were added to the inner wall of the side plate of the disc where high stress concentration occurred to form the final structural model of the disc, so as to improve the local stiffness and load-bearing capacity of the edge area of ​​the disc. Based on the final structural model of the disc, a matching mold structure and flow channel venting system are designed, and the molding process parameters are optimized using response surface methodology or orthogonal experimental design. Based on the final structural model and molding process parameters, a disc sample was prepared, and its side plates were subjected to compressive load tests.

5. The design method for bamboo-plastic trays as described in claim 4, characterized in that, The performance parameters of the bamboo-plastic composite material include density, notched beam impact strength, tensile strength, elongation at break, flexural strength, and flexural modulus.

6. The design method for bamboo-plastic trays according to claim 4, characterized in that, The key structural parameters of the disc include the thickness of the disc body, the radius of the disc body, the number of reinforcing ribs, the height and thickness of the reinforcing ribs, the spacing between the reinforcing ribs, and the thickness of the side plates.

7. The design method for bamboo-plastic trays according to claim 4, characterized in that, The molding process parameters include molding temperature, molding pressure, holding time, and cooling time.

8. The design method for bamboo-plastic trays according to claim 7, characterized in that, The compression temperature is 160℃-190℃, the compression pressure is 1000t·f-1300t·f, the holding time is 30s-60s, and the cooling time is 60s-120s.

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