High-elastic vibration reduction type table tennis bat bottom plate containing TiBN ceramic powder interlayer and preparation method thereof

Abstract

The invention belongs to the technical field of sports equipment and composite materials, and discloses a table tennis bat bottom plate containing ceramic powder and a preparation method of the table tennis bat bottom plate. The bottom plate is formed by laminating a plurality of layers of wood chips or fiber sheets through an epoxy resin adhesive containing ceramic powder, and the ceramic micro powder in the adhesive layer is uniformly distributed to form a continuous ceramic interlayer. The ceramic powder is preferably prepared by adopting a solid boronizing method, the average particle size is about 1 micron, and the ceramic powder is of a polycrystalline structure. When the racket is stressed, sliding friction is generated among the ceramic particles, and part of mechanical energy is converted into heat energy to be dissipated, so that vibration is effectively reduced, and the rebound performance of the bottom plate is improved. Compared with a traditional bottom plate reinforced through continuous ceramic fibers, the technological process is simpler and more convenient, the cost is lower, a uniform damping structure is formed in the bonding layer, the vibration reduction effect is remarkably improved, and meanwhile high elasticity is kept. In the preparation process, the fiber layer does not need to be independently treated, and the manufacturing process is further simplified.

Description

Technical Field

[0001] The present invention belongs to the technical field of sports equipment and composite materials, and in particular relates to a high-elasticity vibration-damping table tennis racket bottom plate containing a TiBN ceramic powder interlayer and a preparation method thereof. Background Art

[0002] The existing table tennis racket bottom plate technologies on the market mainly use pure wood structure or composite structure. Some of these technologies use continuous ceramic fiber interlayer to enhance the structural uniformity and durability of the bottom plate. However, the preparation requirements of continuous ceramic fiber are high, and the fiber layer needs to be processed separately. The process is complicated and the production cost is high. At the same time, the continuous ceramic fiber mainly plays a structural reinforcement role when subjected to force, and its vibration reduction effect is relatively limited. The present invention uses granular TiBN ceramic powder with an average particle size of about 1μm and a polycrystalline structure, such as Figure 1 As shown in the figure, when subjected to force, granular powder dissipates energy through slip and friction between particles, achieving vibration attenuation. This method is simple and low-cost, and it can form a uniform damping structure in the baseplate adhesive layer, thereby simultaneously improving the baseplate's rebound performance and vibration reduction effects.

[0003] Existing methods for improving floor performance primarily focus on material modification and structural optimization, such as adopting multi-layer composite structures, adjusting the number and arrangement of wood chips, and introducing artificial fibers. However, these methods often suffer from complex processes, high costs, or inconsistent results, making it difficult to simultaneously achieve high rebound force and low vibration.

[0004] In recent years, ceramic materials have garnered widespread attention due to their high hardness, high elastic modulus, and excellent energy absorption and damping properties. In particular, the introduction of ceramic powder as an additive into the bonding layer can rapidly convert some mechanical energy into heat through microscopic particle slip and friction when subjected to force, thereby achieving a vibration reduction effect. Furthermore, the high elastic modulus of ceramic powder also helps enhance the rebound force of the base. Although extensive research has been conducted on the application of ceramic materials in other fields, their application in table tennis racket bases remains exploratory, with no mature preparation process or theoretical framework yet established. Summary of the Invention

[0005] In response to the problems in the prior art of insufficient elasticity of pure wooden baseboards and excessive vibration and poor feel of composite baseboards, the present invention provides a high-elasticity and vibration-damping table tennis racket baseboard containing a TiBN ceramic powder interlayer and a preparation method thereof.

[0006] The present invention is realized as follows: a table tennis racket base plate containing a TiBN ceramic powder interlayer is formed by laminating multiple layers of wood chips or fiber sheets through an epoxy resin adhesive layer containing TiBN ceramic powder.

[0007] a. TiBN ceramic powder is evenly distributed in each bonding layer to form a continuous ceramic interlayer;

[0008] b. The TiBN ceramic powder has an average particle size of 1 micron and a mass fraction of 1% -60% of the total mass of the base plate;

[0009] c. The layers are arranged symmetrically to improve the rebound and vibration attenuation performance of the base.

[0010] The present invention also provides a ceramic mixed glue for a table tennis racket base plate. The mixed glue consists of TiBN ceramic powder, epoxy resin and curing agent. The TiBN ceramic powder accounts for 1%-60% of the total mass of the mixed glue, and the curing agent accounts for 8%-12% of the mass of the epoxy resin. The average particle size of the TiBN ceramic powder is 1 micron, and the TiBN ceramic powder is uniformly dispersed in the epoxy resin after mechanical stirring and ultrasonic treatment.

[0011] The present invention also provides a method for preparing the base plate according to claim 1, characterized in that it comprises the following steps:

[0012] a. TiBN ceramic powder and epoxy resin are mixed in a mass ratio of 1% -60%, and a curing agent of 8% -12% of the epoxy resin mass is added, and mechanical stirring and ultrasonic treatment are performed to form a uniform mixed glue;

[0013] b. Apply the mixed glue evenly to the bonding surface of the wood chips or fiber chips, and stack them into a blank according to the symmetrical structure;

[0014] c. Apply a pre-press of 10 kg per square centimeter to the assembly for 2-3 hours;

[0015] d. hot pre-pressing at 110 degrees Celsius for 1 hour;

[0016] e. Hot press curing at 115-120 degrees Celsius for 1-1.5 hours;

[0017] f. Trim and polish the cured base plate.

[0018] The present invention also provides a device for manufacturing the base plate according to claim 1, characterized in that it comprises:

[0019] a. Ceramic mixed adhesive preparation system, used to mix TiBN ceramic powder, epoxy resin and curing agent;

[0020] b. a gluing device for applying the mixed glue to the wood chips or fiber chips;

[0021] c. a stacking device for stacking wood chips or fiber chips in a symmetrical order;

[0022] d. Compression and curing device, used for pre-pressing, hot pre-pressing and hot pressing curing;

[0023] e. Post-processing device, used for trimming and grinding.

[0024] The present invention also provides a method for preparing a high-elasticity and vibration-damping table tennis racket bottom plate containing a TiBN ceramic powder interlayer, comprising:

[0025] Step 1, preparing ceramic mixed glue;

[0026] Mix TiBN ceramic powder with a purity of not less than 95% and an average particle size of approximately 1 μm with epoxy resin at a ratio of 1wt% to 60wt% (preferably 20wt% to 30wt%), and then add epoxy curing agent (8wt% to 12wt% of the weight of the epoxy resin). It is recommended to use magnetic stirring or ultrasonic dispersion for 10 to 15 minutes to ensure that the TiBN ceramic powder is evenly dispersed in the epoxy resin and prevent particle agglomeration.

[0027] Step 2: Glue coating and assembly;

[0028] The TiBN ceramic mixed adhesive is evenly applied to the bonding surface of the wood chips or fiber chips, and stacked in a predetermined order to form a multi-layer structure, wherein the TiBN ceramic powder is evenly distributed in the bonding layer to form a ceramic interlayer;

[0029] Step three, pressing and curing;

[0030] The pre-pressing, aging, hot pre-pressing and hot pressing curing treatments are carried out on the assembly to ensure that the layers are fully bonded and that the TiBN ceramic powder forms a continuous damping and elasticity-enhancing structure in the bonding layer. The pre-pressing process uses a pressure of about 10 kg / cm 2 The pre-pressing time is kept at 2 to 3 hours; then in the hot pre-pressing stage, the temperature is set to 110±5℃ and kept warm for about 1 hour; in the hot pressing curing stage, it is recommended to control the temperature within the range of 115℃~120℃ and keep warm for 1 to 1.5 hours to ensure full bonding between the layers and form a continuous and uniform ceramic interlayer;

[0031] Step 4, post-processing;

[0032] The cured bottom plate is subjected to processing such as trimming and grinding to obtain a finished table tennis racket bottom plate containing ceramic powder.

[0033] Furthermore, in step 1, the TiBN ceramic powder is prepared by solid boronizing method, the average particle size of the TiBN ceramic powder is about 1 μm, and the mass ratio of the TiBN ceramic powder to the epoxy resin is 1 wt % to 60 wt %.

[0034] Furthermore, the multi-layer structure base plate adopts a symmetrical structural design, including core material, force material and surface material, wherein the core material is located in the middle, the force materials are located on both sides of the core material, and the surface material is located in the outermost layer, and the overall performance is optimized through the bonding layer containing TiBN ceramic powder.

[0035] The beneficial effects and core innovations of the present invention are:

[0036] Micron-sized granular TiBN ceramic powder is directly dispersed in the epoxy adhesive layer between the multiple layers of wood chips (or fiber sheets) on the baseboard. Leveraging the high elastic modulus of the TiBN ceramic particles and their ability to dissipate mechanical energy through sliding friction between the particles, this method not only improves the baseboard's rebound performance but also forms a uniform damping structure within the adhesive layer, achieving significant vibration reduction. This method also eliminates the need for separate preparation and placement of continuous ceramic fibers, greatly simplifying the production process and reducing costs.

[0037] This technical solution introduces TiBN ceramic powder into the adhesive layer of a conventional baseplate. By compounding the TiBN ceramic powder with epoxy resin, a uniformly distributed ceramic interlayer is formed. This approach aims to maintain high rebound force while effectively reducing vibration. This method offers advantages such as simplicity, low cost, and ease of large-scale production. It provides a novel technical approach to addressing the existing difficulty in balancing rebound and vibration in baseplates, and is of great significance for improving the overall performance of high-performance table tennis rackets.

[0038] Although the use of continuous ceramic fibers in the prior art can improve the uniformity of the base plate structure, the process is complex and costly due to the need to process the fiber layer separately. Moreover, its vibration reduction effect mainly relies on structural reinforcement and is relatively limited. In contrast, the present invention uses granular ceramic powder, which can not only be directly mixed with epoxy resin to prepare a homogeneous adhesive layer, but also when subjected to force, the slip and friction between the particles can quickly convert mechanical energy into heat energy, achieving more effective vibration attenuation, while also greatly simplifying the process flow and reducing production costs. Therefore, it is necessary to provide a new base plate structure / preparation method that can simultaneously improve rebound performance and reduce vibration.

[0039] (1) The rebound force of the base plate is increased and the vibration is reduced simultaneously, overcoming the defects of insufficient elasticity of pure wood base plates and excessive vibration of composite base plates;

[0040] (2) The preparation process is simple, with low energy consumption and cost, and is suitable for large-scale batch production;

[0041] (3) The obtained TiBN powder has good energy absorption performance. Table 1 shows the compression parameters of various ceramic powders. The "initial height" is the height when the indenter starts to apply pressure; the "final height" is the distance the indenter moves downward after the powder is pressed. The difference between them is defined as the "displacement". The "initial pressure" represents the pressure used when the pressure is started. The "final pressure" represents the pressure applied at the "final height" position. The "pressure difference" is equal to the pressure applied at the "final height" position minus the "initial pressure". The value obtained by dividing the "pressure difference" by the "displacement" is defined as the energy consumption, with the unit of MPa / mm. Its physical meaning is defined as: the energy required when the powder is pressed down per unit thickness. Calculation of the data in Table 3 shows that the energy consumption of the synthetic powder is 15.33 MPa / mm, which is several times or even dozens of times smaller than that of other powders, indicating that the synthetic powder is the easiest to compress.

[0042] (4) The damping layer formed by ceramic powder has good energy absorption performance, which can effectively alleviate the vibration when hitting the ball and improve the feel of hitting the ball. Figure 2 As shown, the energy dissipation performance of the TiBN ceramic powder used in the present invention under the same external force is significantly better than that of other ceramic powders, which helps to improve the damping characteristics;

[0043] (5) The table tennis racket bottom plate thus prepared not only improves the rebound performance but also maintains the structural stability and durability of the bottom plate, which is beneficial to improving the competitive level of the players.

[0044] In standard tests, the rebound height of the table tennis racket base prepared by the present invention is about 12% to 18% higher than that of traditional pure wood bases, and the vibration duration is shortened by about 25% to 35%, which significantly improves the control and feel when hitting the ball. In addition, after repeated hitting tests, the base structure is stable and there is no peeling of the adhesive layer. In addition, compared with the continuous ceramic fiber solution, the prepared base achieves more significant vibration attenuation due to the use of granular ceramic powder. At the same time, the process is simpler and the production cost is lower. Figure 3 As shown in the figure, when external force is applied to the sandwich structure, the ceramic particles undergo micro-slip and friction in the epoxy adhesive, and part of the mechanical energy is converted into heat energy, which plays an energy-consuming and vibration-reducing role. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a flow chart of a method for manufacturing a table tennis racket bottom plate containing a TiBN ceramic powder interlayer provided by an embodiment of the present invention;

[0046] Figure 2 This is a transmission electron micrograph and element distribution of the TiBN powder provided by an embodiment of the present invention, showing that the particles contain finer crystals;

[0047] Figure 3The relationship between the compression energy and dissipated energy of the TiBN synthetic powder provided by the embodiment of the present invention and other powders;

[0048] Figure 4 The embodiment of the present invention provides a powder particle change process and its mechanical expression when a force is applied;

[0049] Figure 5 The embodiment of the present invention is divided into two parts (a) and (b), which are respectively a scanning electron microscopic image of the ceramic particles + epoxy resin mixture (a) and a photo of the actual sample of the prepared ceramic base plate (b);

[0050] Figure 6 The mechanical behavior of ceramic particles between layers under the force of a table tennis ball provided by an embodiment of the present invention;

[0051] Figure 7 Schematic diagram of the structural unit of the ceramic base plate provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the embodiments. It should be understood that the embodiments described herein are only used to explain the present invention and are not intended to limit the scope of protection of the present invention.

[0053] like Figure 1 As shown, the embodiment of the present invention provides a method for manufacturing a table tennis racket bottom plate containing a TiBN ceramic powder interlayer, which is formed by laminating multiple layers of wood chips or fiber sheets through an epoxy resin adhesive layer containing TiBN ceramic powder.

[0054] S1. TiBN ceramic powder is evenly distributed within each bonding layer to form a continuous ceramic interlayer;

[0055] S2. The TiBN ceramic powder has an average particle size of 1 micron and a mass fraction of 1%-60% of the total mass of the base plate;

[0056] S3. The layers are arranged symmetrically to improve the rebound and vibration attenuation performance of the base.

[0057] like Figure 2 、 Figure 3 As shown, an embodiment of the present invention provides a ceramic mixed adhesive for a table tennis racket base. The mixed adhesive consists of TiBN ceramic powder, epoxy resin and a curing agent. The TiBN ceramic powder accounts for 1%-60% of the total mass of the mixed adhesive, and the curing agent accounts for 8%-12% of the mass of the epoxy resin. The TiBN ceramic powder has an average particle size of 1 micron and is uniformly dispersed in the epoxy resin after mechanical stirring and ultrasonic treatment.

[0058] Existing table tennis racket bases typically utilize a laminated structure of wood or fiber layers bonded with traditional epoxy adhesives. However, this structure struggles to achieve both good rebound and vibration control. While pure wood lamination offers a certain degree of elasticity, it suffers from significant energy loss and a delayed rebound response. Furthermore, while fiber-reinforced structures offer high strength, they suffer from excessive rigidity and a stiff feel, making it difficult to achieve both power and control during fast-break looping shots.

[0059] This invention attempts to break away from the structural reinforcement logic of continuous reinforcing fibers and instead incorporates high-hardness microparticles—ceramic powder—to create a discrete sandwich micro-damping structure. Introducing ceramic powder into the adhesive resin to form a glue layer not only increases the rigidity between the layers, but also creates a granular structure that produces micro-scale slippage, collision, and friction during the ball striking process, creating a "hysteretic absorption" of the shock wave. This introduces a concept similar to "particle damping" to the base of a table tennis racket.

[0060] Unlike the continuous rigid paths formed by high-modulus fibers, ceramic particles are evenly distributed throughout the adhesive layer. When locally compressed, they induce microstructural slip and rotation, releasing some of the kinetic energy and converting it into heat. This microstructural mechanism allows the baseplate to rapidly dissipate initial energy without compromising overall structural rigidity, resulting in exceptional "fast rebound, slow vibration" characteristics.

[0061] Furthermore, the ceramic powder material's polycrystalline structure, composed of numerous fine grains, provides a natural "stress diffusion" capability. During impact, the impact stress from the ball isn't concentrated on a single contact surface, but rather is transferred and spread among the grains, significantly reducing the risk of localized damage and extending the blade's lifespan.

[0062] In actual structural design, by controlling the ceramic powder content and dispersion uniformity, it is possible to maintain the blade's strength while finely controlling the elastic response of different areas. This design strategy breaks the traditional "rigid-flexible" binary structure, forming a complex structure with built-in multi-scale adjustment mechanisms, which better adapts to the mechanical response requirements of different playing styles.

[0063] Ultimately, by optimizing the bonding process and temperature-controlled curing, the ceramic particles are stably embedded in the resin matrix to form a continuous sandwich, eliminating the need for tedious steps such as weaving, pre-impregnation, and cutting. This manufacturing path not only reduces material and labor costs but also provides a highly controllable technical path for industrial mass production, laying a realistic foundation for the widespread adoption of high-performance baseboards.

[0064] The present invention provides a high-elasticity and vibration-damping table tennis racket base plate containing a ceramic powder interlayer and a preparation method thereof. By introducing ceramic powder and epoxy resin composite glue into the adhesive layer of a traditional wooden base plate, a uniformly distributed ceramic interlayer is formed, thereby achieving simultaneous enhancement of rebound force and reduction of vibration, improving the batting feel, and being suitable for the production and application of high-performance table tennis rackets.

[0065] This embodiment takes the preparation of a table tennis racket bottom plate with a 5-layer structure as an example, and the specific steps are as follows:

[0066] S101 Preparation of ceramic mixed glue

[0067] a. Select ceramic powder with a purity of not less than 95% and an average particle size of about 1 μm (such as aluminum oxide, silicon oxide, etc. that can provide excellent damping performance) and mix it with epoxy resin at a mass ratio of 1wt% to 60wt% (preferably 20wt% to 30wt%), and add epoxy curing agent (8wt% to 12wt% of the weight of the epoxy resin). During the mixing process, in addition to mechanical stirring, this embodiment is supplemented by magnetic stirring or ultrasonic dispersion treatment for 10 to 15 minutes to ensure that the ceramic powder is fully and evenly dispersed in the epoxy resin to prevent particle agglomeration. Compared with the process that requires separate preparation and laying of continuous ceramic fibers, this method can directly obtain a homogeneous mixed glue, which not only shortens the preparation time but also reduces equipment and process requirements. Figure 5 As shown in (a), the ceramic powder is evenly dispersed in the epoxy resin adhesive, and no obvious agglomeration is observed.

[0068] S102 Prepare wood chips

[0069] High-quality natural wood (such as basswood, cherry wood, etc.) is selected and processed into wood chips with a thickness of 0.6 to 1.0 mm after a long period of drying to ensure that the surface of the wood chips is smooth and meets the bonding requirements.

[0070] S103 Gluing and Lamination

[0071] The ceramic mixed glue prepared in S101 is evenly applied to the bonding surface of each wood chip, and stacked into a symmetrical structure in a predetermined order (for example: surface material - strength material - core material - strength material - surface material) to form a multi-layer baseboard assembly.

[0072] S104 pre-pressing and aging

[0073] Place the pre-press in a pre-press and apply about 10 kg / cm 2 Keep pressing for 2 to 3 hours to allow the mixed glue to fully penetrate the wood chip fibers and initially form a solid bond.

[0074] S105 hot pre-pressing and hot pressing curing

[0075] The pre-pressed blanks are transferred to the hot pre-pressing equipment, set at 110±5℃, and kept warm for about 1 hour; then hot pressing and curing are carried out in the hot press. By strictly controlling the temperature (110±5℃ and 115~120℃) and the pressure (about 10kg / cm 2 ) and heat preservation for 1 to 1.5 hours, this embodiment ensures that the layers of wood or fiber sheets are firmly bonded together by the mixed adhesive containing ceramic powder, forming a continuous and uniform ceramic interlayer within the adhesive layer. In contrast, continuous ceramic fiber technology requires separate processing of the fiber layers, which is more complex.

[0076] S106 post-processing

[0077] After the curing is completed, the bottom plate is trimmed, polished and shaped to achieve the required size and surface finish, and the finished high-elasticity and vibration-damping table tennis racket bottom plate containing a ceramic powder interlayer is obtained. Figure 5 (b) is a real picture of the table tennis racket bottom plate made by the present invention, showing that the bottom plate has a compact structure and a smooth surface.

[0078] The main innovations of the present invention are:

[0079] 1. Ceramic powder and epoxy resin composite glue are introduced into the bonding layer of the traditional wooden baseboard to form a uniformly distributed ceramic interlayer, achieving dual optimization of improving the baseboard's rebound force and vibration control.

[0080] 2. The ceramic powder used, due to its high elastic modulus and excellent energy absorption and damping properties, can quickly convert part of the mechanical energy into heat energy when hitting the ball, reducing vibration while increasing the overall rigidity of the baseplate.

[0081] 3. The preparation process is simple, energy consumption is low, and cost is low, which is suitable for mass production. It also improves the problem of insufficient hitting stability of traditional baseboards.

[0082] 4. The present invention uses granular ceramic powder with an average particle size of approximately 1 μm and a polycrystalline structure. Compared with continuous ceramic fibers, it has higher dispersibility; it can be directly mixed with epoxy resin to form a uniform damping bonding layer, which not only greatly simplifies the manufacturing process and reduces production costs, but also quickly converts mechanical energy into heat energy through inter-particle slip and friction when subjected to force, thereby achieving more effective vibration attenuation.

[0083] Through experimental comparison, the base plate prepared by the present invention shows obvious advantages in the following aspects:

[0084] (1) Improved rebound performance: In the standard ball hitting test, the rebound height of the baseboard of the present invention is increased by about 12% to 18% compared with the traditional pure wood baseboard, and the ball speed is faster. The rebound height is measured by the free-fall ball rebound height measurement method.

[0085] (2) Significant vibration attenuation: Vibration test curve (see Figure 4 ) shows that the vibration duration of the baseplate of the present invention is shortened by approximately 25% to 35%, improving stability and control accuracy during hitting the ball. The vibration duration is recorded in real time by an acceleration sensor, and the average vibration decay time is obtained from the response curve.

[0086] (3) Enhanced durability: Repeated use tests show that the base plate of the present invention still maintains a good structure after repeatedly hitting the ball 10,000 times, without obvious cracks or peeling of the adhesive layer.

[0087] (4) Process economy: The preparation method has a simple process flow, low hot pressing curing temperature, short production cycle, lower energy consumption and production cost than traditional preparation methods, and is convenient for industrial production.

[0088] Example 1 (pure wood baseboard)

[0089] The 5-layer structure baseboard is made of basswood. The mass ratio of ceramic powder to epoxy resin in S101 is set to 25wt%, and the pre-pressing pressure is 10kg / cm 2 The pre-pressing time was 2.5 hours, the hot pre-pressing temperature was 110°C for 1 hour, and the hot pressing curing temperature was 120°C for 1.5 hours. Test results showed that the bounce height of the manufactured bottom plate was about 12% higher than that of traditional bottom plates, and the vibration decay time was shortened by about 25%.

[0090] Example 2 (composite base plate)

[0091] The traditional wood panels were partially replaced with carbon fiber panels to create a seven-layer baseboard. The mass ratio of ceramic powder to epoxy resin in the ceramic adhesive mix in S101 was set at 30wt%, the pre-pressing time was extended to 3 hours, and the hot press curing temperature was adjusted to 115°C for 1 hour. Trial hitting tests showed that the rebound performance of this baseboard was improved by approximately 18%, the vibration decay time was shortened by approximately 35%, and the hitting feel was significantly better than in Example 1.

[0092] Example 3 (High-end multi-layer baseboard)

[0093] The S101 features a nine-layer construction, with high-grade wood used for both the face and core materials, and mid-grade wood used for the base. The ceramic powder to epoxy resin ratio in the S101 is set at 20% by weight, with a pre-pressing time of two hours, a hot press curing temperature of 120°C, and a hold time of 1.5 hours. This blade demonstrated an excellent balance of rebound and vibration control in ball striking tests, making it suitable for high-level competitions.

[0094] This example demonstrates that by directly producing a homogeneous damping adhesive layer by compounding granular ceramic powder with epoxy resin, the present invention not only improves both the rebound force and vibration reduction of the baseboard, but also significantly simplifies the preparation process and reduces production costs. Compared to the complex processing of continuous ceramic fibers, this method is more suitable for industrial large-scale production.

[0095] In summary, the present invention utilizes a uniform ceramic interlayer formed from a composite of ceramic powder and epoxy resin, effectively enhancing the rebound performance of table tennis racket blades while significantly shortening vibration duration, improving stability and feel during impact. This simple, low-cost, and easily scalable process offers a novel solution to traditional blade technologies that balances high rebound performance with low vibration.

[0096] To implement the above preparation method, the present invention also provides an example of a manufacturing device, comprising the following parts:

[0097] 1. Ceramic mixed adhesive preparation system: equipped with a closed container with a high-speed mechanical stirrer and an ultrasonic disperser, used to mix ceramic powder, epoxy resin and curing agent according to the proportion and disperse them evenly;

[0098] 2. Gluing device: Use an adjustable roller coater or sprayer to evenly apply the mixed glue to the surface of the wood chips (or fiber chips). The thickness can be adjusted online.

[0099] 3. Lamination device: It has symmetrical positioning brackets, which automatically align and laminate each layer in a predetermined order (surface material - strength material - core material - strength material - surface material);

[0100] 4. Pressing and curing device: integrated pre-pressing machine and hot press machine, the two parts share the same pressure and temperature control system, can perform "pre-pressing - hot pre-pressing - hot pressing curing" process stages separately or continuously, the pressure can reach 10kg / cm 2 , the temperature can be controlled within ±5℃;

[0101] 5. Post-processing device: including CNC trimming machine and automatic grinder, used for trimming, deburring and surface finishing of the cured base plate.

[0102] Each unit is connected by a conveying mechanism, which can realize continuous production from mixing to finished products.

[0103] Table 1: Shows the energy consumption of various ceramic powders.

[0104] Table 1 Energy consumption of synthetic powder

[0105]

[0106] like Figure 5(a) shows the morphology of a TiBN ceramic particle + epoxy resin mixture. The epoxy resin and ceramic particles are tightly bonded and well-bonded. (b) A table tennis racket with a ceramic base, made of ceramic particles, epoxy resin, and a mixture of adhesives, with a base made of seven layers of pure wood.

[0107] Figure 6 The mechanical behavior of ceramic particles between layers under the force of a table tennis ball provided by an embodiment of the present invention;

[0108] Figure 7 Schematic diagram of the structural unit of the ceramic base plate provided by an embodiment of the present invention.

[0109] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with this technical field within the technical scope disclosed by the present invention and within the spirit and principles of the present invention should be covered by the scope of protection of the present invention.

Claims

1. A table tennis racket base with a TiBN ceramic powder interlayer, which is composed of multiple layers of wood chips or fiber sheets laminated with an epoxy resin adhesive layer containing TiBN ceramic powder, characterized in that: a. TiBN ceramic powder is evenly distributed in each bonding layer to form a continuous ceramic interlayer; b. The TiBN ceramic powder has an average particle size of 1 micron and a mass fraction of 1% -60% of the total mass of the base plate; c. The layers are arranged symmetrically to improve the rebound and vibration attenuation performance of the base.

2. A ceramic mixed rubber for table tennis racket bottom plate, characterized in that: The mixed glue consists of TiBN ceramic powder, epoxy resin and curing agent, wherein the TiBN ceramic powder accounts for 1%-60% of the total mass of the mixed glue, the curing agent accounts for 8%-12% of the mass of the epoxy resin, the average particle size of the TiBN ceramic powder is 1 micron, and the TiBN ceramic powder is uniformly dispersed in the epoxy resin after mechanical stirring and ultrasonic treatment.

3. A method for preparing the base plate according to claim 1, characterized in that: The following steps are involved: a. TiBN ceramic powder and epoxy resin are mixed in a mass ratio of 1% -60%, and a curing agent of 8% -12% of the epoxy resin mass is added, and mechanical stirring and ultrasonic treatment are performed to form a uniform mixed glue; b. Apply the mixed glue evenly to the bonding surface of the wood chips or fiber chips, and stack them into a blank according to the symmetrical structure; c. Apply a pre-press of 10 kg per square centimeter to the assembly for 2-3 hours; d. hot pre-pressing at 110 degrees Celsius for 1 hour; e. Hot press curing at 115-120 degrees Celsius for 1-1.5 hours; f. Trim and polish the cured base plate.

4. A device for manufacturing the base plate according to claim 1, characterized in that: include: a. Ceramic mixed adhesive preparation system, used to mix TiBN ceramic powder, epoxy resin and curing agent; b. a gluing device for applying the mixed glue to the wood chips or fiber chips; c. a stacking device for stacking wood chips or fiber chips in a symmetrical order; d. Compression and curing device, used for pre-pressing, hot pre-pressing and hot pressing curing; e. Post-processing device, used for trimming and grinding.

5. The base plate according to claim 1, wherein: The multilayer structure consists of a core material layer, a strength material layer and a surface material layer, wherein the core material layer is located in the middle, the strength material layers are located on both sides of the core material layer, and the surface material layer is located on the outermost side. The layers are connected by an adhesive layer containing TiBN ceramic powder.

6. The base plate according to claim 1, wherein: The continuous ceramic interlayer is distributed in no less than three layers along the thickness direction of the bottom plate, and the thickness of each layer is uniform.

7. The method according to claim 3, characterized in that In step a, magnetic stirring and ultrasonic dispersion are combined for 10-15 minutes.

8. The method according to claim 3, characterized in that During step ce, the assembly is always kept in a closed environment to prevent foreign matter from entering the bonding layer.

9. The method according to claim 3, characterized in that The stacking order in step b is surface material-strength material-core material-strength material-surface material.

10. The device according to claim 4, characterized in that The glue coating device is equipped with an automatic metering control module to accurately control the coating amount of each layer of mixed glue to ensure consistent thickness of each ceramic interlayer.

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