Patterned reinforced material 3D printing method and system based on acoustic manipulation technology

Abstract

The present invention provides a method and system for 3D printing of patterned reinforcing materials based on acoustic manipulation technology. This method involves combining acoustic manipulation technology with digital light processing (DLP) technology for manufacturing composite material samples containing patterned reinforcing filler distributions. This technology uses computer-aided design software to design a three-dimensional model and utilizes a digital acoustic hologram to convert planar ultrasonic waves into a specific three-dimensional sound field, enabling precise manipulation of the reinforcing filler within a photosensitive resin. The acoustic manipulation system controls the distribution of the reinforcing filler, while a DLP projector is used to solidify the composite material layer by layer. The method of the present invention allows for real-time adjustment of the digital acoustic hologram to accommodate different reinforcing filler pattern assembly and reinforcement requirements. The technical solution of the present invention not only improves the 3D printing capability to control the distribution of reinforcing fillers but also broadens the application areas of composite materials.

Description

Technical Field

[0001] The present invention belongs to the field of 3D printing technology, and in particular relates to a method and system for 3D printing of patterned reinforcement materials based on acoustic manipulation technology. Background Art

[0002] In the fields of modern materials science and manufacturing, 3D printing, as an emerging additive manufacturing technology, has demonstrated tremendous potential and broad application prospects. It can construct complex three-dimensional objects layer by layer based on digital design models. It is gaining application and popularity in numerous industries, including aerospace, biomedicine, automotive, and consumer electronics.

[0003] Traditional 3D printing technology often faces numerous challenges when manufacturing high-performance components. For 3D printing of composite materials, the uniformity and orderliness of the reinforcement distribution within the printed matrix crucially influence the performance of the final product. However, in most existing 3D printing processes, such as fused deposition modeling (FDM), selective laser sintering (SLS), and conventional photocuring 3D printing, reinforcements are typically simply mixed with the matrix material before printing, making it difficult to achieve precise control and patterned arrangement at the microscale. This random or disordered distribution of reinforcements limits further improvements in composite material performance, hindering the full potential of reinforcements and making it difficult to meet the demands of high-end applications with specific mechanical, physical, or functional requirements. Summary of the Invention

[0004] In view of the above-mentioned existing problems, the present invention provides a 3D printing method and system for patterned reinforced materials based on acoustic manipulation technology. First, it provides a 3D printing system for patterned reinforced materials based on acoustic manipulation technology. Second, it provides a 3D printing method for patterned reinforced materials based on acoustic manipulation technology.

[0005] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0006] A 3D printing system for patterned reinforcement materials based on acoustic manipulation technology has the following specific features, including:

[0007] The DLP molding device is used to cure the photosensitive resin to form each layer of the 3D printed object. It includes a DLP projector, a molding platform, and a resin tank. The DLP projector projects a preset two-dimensional pattern onto the surface of the photosensitive resin in the form of light. The resin tank is a container for the photosensitive resin. The resin tank has good light transmittance so that the light projected by the DLP projector can pass through smoothly and illuminate the photosensitive resin inside, prompting the resin to undergo a light-curing reaction. The molding platform is placed inside the resin tank and is initially positioned a certain distance above the bottom of the resin tank. At the beginning of the printing process, the surface of the molding platform will contact the photosensitive resin. As printing progresses, after each layer of resin is cured, the molding platform will rise by a preset distance, allowing a new layer of photosensitive resin to cover the cured layer, so that the next layer can be cured and molded, until the entire 3D printed object is completed;

[0008] The digital acoustic hologram generator, located at the bottom of the resin tank in the DLP molding device, is used to generate a digital acoustic hologram that can convert planar ultrasonic waves into a specific three-dimensional sound field. The acoustic hologram can be adjusted in real time to instantly change the effect of sound waves in the resin. The DLP projector and the digital acoustic hologram generator are two important components, both located at the bottom of the resin tank. By interchanging their relative positions, they can flexibly realize the order of light curing and acoustic manipulation to meet different 3D printing needs and product requirements.

[0009] The particle dispersion device includes multiple ultrasonic transducers, which are evenly distributed along the outer wall of the resin tank and are used to evenly disperse the reinforcing filler. Its operating frequency is within the range of 20kHz to 100kHz, and the power is set between 50W and 500W. On the one hand, it is enough to strongly destroy the agglomerates formed by the reinforcing filler, so that the filler can be fully dispersed; on the other hand, it can avoid unnecessary excessive damage to the structure of the photosensitive resin due to excessive energy.

[0010] Furthermore, the digital acoustic hologram generating device further comprises:

[0011] The ultrasonic transducer array, as the core component, is responsible for transmitting and receiving ultrasonic signals. Its arrangement and number must be determined according to the scale and accuracy requirements of the three-dimensional sound field to be generated;

[0012] The signal generator generates an electrical signal of corresponding frequency, phase, and amplitude according to the determined acoustic hologram information and conversion strategy, and transmits it to the ultrasonic transducer array, causing it to emit planar ultrasonic waves;

[0013] The controller can adjust the combination and arrangement of the ultrasonic transducer array and the operating parameters of a single ultrasonic transducer in real time, thereby precisely controlling the propagation and interference of planar ultrasonic waves in space, so that they converge and overlap in the resin tank to form a specific three-dimensional sound field that meets the design requirements.

[0014] Among them, the frequency range of the ultrasonic transducer array is 20kHz to 100kHz, the amplitude range is 0.1mm to 1mm, and the combination of the ultrasonic transducer array can be adjusted in real time according to the preset algorithm to adapt to different sound field distribution requirements.

[0015] Among them, the operating parameter selection range of the DLP projector is exposure time of 100ms to 500ms; layer thickness of 0.05mm to 0.2mm; and light sensitivity of 200mW / cm² to 500mW / cm².

[0016] In other words, a method for 3D printing of patterned reinforcement materials based on acoustic manipulation technology includes:

[0017] The material composition includes:

[0018] Reinforcing fillers (1-20 vol.%), which are polymer, metal or ceramic particles with a particle size range of 1 μm to 100 μm;

[0019] Photosensitive resin (80-99 vol.%), which is an acrylate-based photosensitive resin.

[0020] 3D printing process for patterned distribution of acoustic field-assisted reinforced fillers:

[0021] Step 1: Use computer-aided design software to design a three-dimensional model containing the patterned reinforcing filler arrangement, and clarify the distribution pattern, geometry, and size range of the patterned reinforcing filler in the three-dimensional structure;

[0022] Step 2: Based on the patterned distribution characteristics of the reinforcing filler within the model, reverse analysis is performed using an acoustic simulation algorithm to convert geometric and physical information such as the distribution position, shape, and density of the patterned reinforcing filler into corresponding acoustic parameters, such as the behavior and amplitude of the sound wave. This is used to generate the basic data required for digital acoustic holograms. This basic acoustic data is then converted into strategies for actually manipulating the sound waves, such as the shape of the acoustic hologram and the operating parameters of the ultrasonic transducer array.

[0023] Step 3: Add the photosensitive resin to the DLP process resin tank all at once to reach the appropriate liquid level. Then, add an appropriate amount of reinforcing filler to the resin tank. Use the particle dispersion device to refine the filler agglomerates using ultrasonic cavitation, so that the reinforcing filler is evenly dispersed on the surface of the photosensitive resin, ensuring that the filler can evenly respond to the sound waves during subsequent acoustic field manipulation.

[0024] Step 4: Start the digital acoustic hologram generation device. According to the previously set acoustic parameters and manipulation strategy, the uniformly dispersed reinforcing fillers are made to move and aggregate in a directional manner under the action of the three-dimensional sound field, gradually assembling into a pattern corresponding to the designed patterned reinforcement structure.

[0025] Step 5: Start the DLP curing process. The DLP projector projects UV light onto the bottom of the resin tank according to the preset slice layer pattern, causing the resin to rapidly cure in the illuminated area. Because the reinforcing filler has been assembled into the corresponding pattern under the action of the acoustic field, the cured resin layer now contains the patterned reinforcement structure, thus achieving the preparation of a composite material containing a patterned reinforcement structure in a single layer.

[0026] Step 6: Repeat steps 3-5 to ensure the accuracy of the amount of reinforcing filler added in each round, so as to ensure that the quality of each layer of resin containing patterned reinforcing filler is uniform and the structure is stable. As each layer of resin containing patterned reinforcing filler is cured in sequence, the new layer of resin will undergo the same filler assembly and curing operation on the basis of the cured layer, thus forming a high-quality three-dimensional structure for the final stacking;

[0027] Step 7: Clean and post-process the printed three-dimensional structure to finally obtain a sample containing a three-dimensional patterned reinforced composite material.

[0028] The beneficial effects of the present invention are:

[0029] Based on acoustic manipulation technology, through the synergistic effect of digital acoustic hologram generation devices, particle dispersion devices, etc., a specific three-dimensional sound field can be generated according to design requirements, allowing the reinforced fillers to undergo directional movement, aggregation, and other behaviors under the action of the sound field, achieving patterned distribution, and fully tapping the potential of the reinforced materials. It effectively overcomes the problem of random or disordered distribution of reinforced materials in traditional methods, and can better meet high-end application scenarios with special requirements for material mechanics, physical properties or functionality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 This is a schematic diagram of the overall process of a 3D printing method for patterned reinforcement materials based on acoustic manipulation technology according to the present invention;

[0032] Figure 2The present invention provides a 3D printing system for patterned reinforcement materials based on acoustic manipulation technology;

[0033] Figure 3 The ultrasonic transducer array in the digital acoustic hologram generating device involved in the present invention;

[0034] Figure 4 Schematic diagram of the preparation of a single-layer structure of a three-dimensional sample containing a complex patterned reinforced structural material as described in the present invention.

[0035] The reference numerals in the figures indicate:

[0036] Digital acoustic hologram generation device 1, DLP projector 2, molding platform 3, resin tank 4, particle dispersion device 5 DETAILED DESCRIPTION

[0037] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0038] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0039] See Figure 1 A patterned reinforcement material 3D printing system based on acoustic manipulation technology is proposed. Figure 2 As shown, specifically including,

[0040] The DLP molding device is used to cure photosensitive resin to form each layer of a 3D-printed object. Its key components include a DLP projector 2, a build platform 3, and a resin tank 4. The DLP projector 2 projects a preset two-dimensional pattern onto the underlying photosensitive resin surface in the form of light. The resin tank 4 is a container for the photosensitive resin. The resin tank has excellent light transmittance, allowing the light from the DLP projector to pass smoothly through and illuminate the photosensitive resin within, prompting the resin to undergo a light-curing reaction. The build platform 3 is placed within the resin tank 4, initially positioned a certain distance above the bottom of the tank. At the start of the printing process, the build platform surface contacts the photosensitive resin. As printing progresses, after each layer of resin cures, the build platform rises a preset distance, allowing a new layer of photosensitive resin to cover the already cured layer, allowing the next layer to be cured and molded, until the entire 3D-printed object is complete.

[0041] The digital acoustic hologram generator 1, located at the bottom of the resin tank 4 in the DLP molding device, is used to generate a digital acoustic hologram that can convert planar ultrasonic waves into a specific three-dimensional sound field. The acoustic hologram can be adjusted in real time to instantly change the effect of the sound waves in the resin. The DLP projector 2 and the digital acoustic hologram generator 1 are two important components, both located at the bottom of the resin tank 4. By interchanging their relative positions, they can flexibly realize the order of light curing and acoustic manipulation, thereby meeting different 3D printing needs and product requirements.

[0042] The particle dispersion device 5 includes multiple ultrasonic transducers, which are evenly distributed along the outer wall of the resin tank 4 and are used to evenly disperse the reinforcing filler. The operating frequency is within the range of 20kHz to 100kHz, and the power is set between 50W and 500W. On the one hand, it is sufficient to strongly destroy the agglomerates formed by the reinforcing filler, so that the filler can be fully dispersed; on the other hand, it can avoid unnecessary excessive damage to the structure of the photosensitive resin due to excessive energy.

[0043] Furthermore, the digital acoustic hologram generating device 1 further comprises:

[0044] Ultrasonic transducer array ( Figure 3 ), as the core component, is responsible for transmitting and receiving ultrasonic signals. Its layout and number need to be determined according to the scale and accuracy requirements of the three-dimensional sound field to be generated;

[0045] The signal generator generates an electrical signal of corresponding frequency, phase, and amplitude according to the determined acoustic hologram information and conversion strategy, and transmits it to the ultrasonic transducer array, causing it to emit planar ultrasonic waves;

[0046] The controller can adjust the combination and arrangement of the ultrasonic transducer array and the working parameters of a single ultrasonic transducer in real time, thereby accurately controlling the propagation and interference of planar ultrasonic waves in space, so that they converge and overlap in the resin tank 4 to form a specific three-dimensional sound field that meets the design requirements.

[0047] Among them, the frequency range of the ultrasonic transducer array is 20kHz to 100kHz, the amplitude range is 0.1mm to 1mm, and the combination of the ultrasonic transducer array can be adjusted in real time according to the preset algorithm to adapt to different sound field distribution requirements.

[0048] The operating parameter selection range of the DLP projector 2 is as follows: exposure time of 100ms to 500ms; layer thickness of 0.05mm to 0.2mm; and light sensitivity of 200mW / cm² to 500mW / cm².

[0049] In other words, a method for 3D printing of patterned reinforcement materials based on acoustic manipulation technology includes:

[0050] The material composition includes:

[0051] Reinforcing fillers (1-20 vol.%), which are polymer, metal or ceramic particles with a particle size range of 1 μm to 100 μm;

[0052] Photosensitive resin (80-99 vol.%), which is an acrylate-based photosensitive resin.

[0053] 3D printing process for patterned distribution of acoustic field-assisted reinforced fillers ( Figure 1 ):

[0054] Step 1: Use computer-aided design software to design a three-dimensional model containing the patterned reinforcing filler arrangement, and clarify the distribution pattern, geometry, and size range of the patterned reinforcing filler in the three-dimensional structure;

[0055] Step 2: Based on the patterned distribution characteristics of the reinforcing filler within the model, reverse analysis is performed using an acoustic simulation algorithm to convert geometric and physical information such as the distribution position, shape, and density of the patterned reinforcing filler into corresponding acoustic parameters, such as the behavior and amplitude of the sound wave. This is used to generate the basic data required for digital acoustic holograms. This basic acoustic data is then converted into strategies for actually manipulating the sound waves, such as the shape of the acoustic hologram and the operating parameters of the ultrasonic transducer array.

[0056] Step 3: Add the photosensitive resin to the DLP process resin tank 4 at once to reach the appropriate liquid level. Then, add an appropriate amount of reinforcing filler to the resin tank 4. Pass the particle dispersion device 5 through ultrasonic cavitation to refine the filler agglomerates and evenly disperse the reinforcing filler on the surface of the photosensitive resin, ensuring that the filler can uniformly respond to the acoustic wave during subsequent acoustic field manipulation.

[0057] Step 4: Start the digital acoustic hologram generation device 1. According to the previously set acoustic parameters and manipulation strategy, the reinforcing fillers uniformly dispersed in the resin are caused to undergo directional movement and aggregation under the action of the three-dimensional acoustic field, and gradually assemble into a pattern corresponding to the designed patterned reinforcement structure;

[0058] Step 5: Start the DLP curing process. DLP projector 2 projects UV light onto the bottom of resin tank 4 according to the preset slice layer pattern, causing the resin to rapidly cure in the illuminated area. Because the reinforcing filler has been assembled into the corresponding pattern under the action of the acoustic field, the cured resin layer now contains the patterned reinforcement structure, thus achieving the preparation of a composite material containing a patterned reinforcement structure in a single layer.

[0059] Step 6. Repeat steps 3-5, ensuring the accuracy of the photosensitive resin, reinforcing filler amount, and parameters in each round of addition to ensure that the quality of each layer of resin containing patterned reinforcing fillers is uniform and the structure is stable. As each layer of resin containing patterned reinforcing fillers is cured in sequence, the new layer of resin will undergo the same filler assembly and curing operations on the basis of the cured layer, thereby forming a high-quality three-dimensional structure for the final stacking;

[0060] Step 7: Clean and post-process the printed three-dimensional structure to obtain a sample containing a three-dimensional patterned reinforced composite material.

[0061] A more preferred first embodiment of the method of the present application is as follows:

[0062] Composition of 3D printing materials: reinforcing filler (10 vol.%) is polystyrene microspheres with a particle size of 10 microns; photosensitive resin is acrylic photosensitive resin.

[0063] Three-dimensional model construction: Use computer-aided design software to design a three-dimensional model containing the patterned reinforcing filler arrangement, and clarify the distribution pattern, geometry, and size range of the patterned reinforcing filler in the three-dimensional structure;

[0064] Reverse analysis: Based on the patterned distribution characteristics of the reinforcing fillers within the model, reverse analysis is performed through acoustic simulation algorithms to convert the geometric and physical information such as the distribution position, shape, and density of the patterned reinforcing fillers into corresponding acoustic parameters;

[0065] Material dispersion: The photosensitive resin is added to the resin tank 4 of the DLP process at one time to reach the appropriate liquid level. Then, an appropriate amount of reinforcing filler is added to the resin tank 4. The particle dispersion device 5 uses ultrasonic cavitation to refine the filler agglomerates and evenly disperse the reinforcing filler on the surface of the photosensitive resin, ensuring that the filler can evenly respond to the sound waves during subsequent acoustic field manipulation.

[0066] Hologram Generation: Based on pre-defined acoustic parameters and manipulation strategies, the reinforcing fillers uniformly dispersed in the resin undergo directional movement and aggregation under the influence of a three-dimensional acoustic field, gradually assembling into a pattern corresponding to the designed patterned reinforcement structure. The ultrasonic transducer array has a frequency range of 20kHz to 100kHz and an amplitude range of 0.1mm to 1mm.

[0067] DLP curing: DLP projector 2 projects UV light onto the bottom of resin tank 4 according to a preset slice layer pattern, causing the resin to rapidly cure in the illuminated area. Each layer has an exposure time of 200ms, a layer thickness of 0.1mm, and a light sensitivity of 200mW / cm². The cured resin layer incorporates the patterned reinforcement structure.

[0068] Repeat the three steps of material dispersion-hologram generation-DLP curing to finally obtain a sample with a three-dimensional pattern enhancement ( Figure 4 ).

[0069] It should be noted that: according to the embodiments of the present invention as described above, these embodiments do not describe all the details in detail, nor do they limit the invention patent to only the specific embodiments described. Obviously, based on the above description, many modifications and changes can be made. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention. This specification selects and specifically describes this embodiment in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can make good use of the present invention and the modifications based on the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A patterned reinforced material 3D printing system based on acoustic manipulation technology, characterized in that: The system includes: A DLP molding device is used to solidify a photosensitive resin to form each layer of a 3D printed object. The device comprises a DLP projector (2), a molding platform (3) and a resin tank (4). The function of the DLP projector (2) is to project a preset two-dimensional pattern onto the surface of the photosensitive resin in the form of light. The resin tank (4) is a container for holding the photosensitive resin. The resin tank has good light transmittance so that the light projected by the DLP projector can pass through smoothly and illuminate the photosensitive resin inside, thereby prompting the resin to undergo a light-curing reaction. The molding platform (3) is placed inside the resin tank (4) and its initial position is located at a certain distance above the bottom of the resin tank. At the beginning of the printing process, the surface of the molding platform will contact the photosensitive resin. As the printing progresses, after each layer of resin is cured, the molding platform will rise according to a preset distance so that a new layer of photosensitive resin covers the cured layer so that the next layer of curing molding can be carried out until the entire 3D printed object is completed. A digital acoustic hologram generating device (1) is located at the bottom of the resin tank (4) in the DLP molding device and is used to generate a digital acoustic hologram that can convert a plane ultrasonic wave into a specific three-dimensional sound field. The acoustic hologram can be adjusted in real time to instantly change the effect of the sound waves in the resin. The DLP projector (2) and the digital acoustic hologram generating device (1) are two important components and are located at the bottom of the resin tank (4). By exchanging their relative positions, they can flexibly realize the order of light curing and acoustic manipulation, thereby meeting different 3D printing needs and product requirements. The particle dispersion device (5) comprises a plurality of ultrasonic transducers which are evenly distributed along the outer wall of the resin tank (4) and are used to evenly disperse the reinforcing filler. The operating frequency thereof is within the range of 20kHz to 100kHz, and the power is set between 50W and 500W. On the one hand, it is sufficient to strongly destroy the agglomerates formed by the reinforcing filler so that the filler can be fully dispersed; on the other hand, it can avoid unnecessary excessive damage to the structure of the photosensitive resin due to excessive energy.

2. The patterned reinforcement material 3D printing system based on acoustic manipulation technology according to claim 1, characterized in that: The digital acoustic hologram generating device (1) is composed of an ultrasonic transducer array, a signal generator, and a controller. The ultrasonic transducer array is a core component responsible for transmitting and receiving ultrasonic signals. The arrangement and number of the ultrasonic transducer array are determined according to the scale and accuracy requirements of the three-dimensional sound field to be generated. The signal generator generates an electrical signal of corresponding frequency, phase, and amplitude according to the determined acoustic hologram information and conversion strategy, and transmits it to the ultrasonic transducer array to cause it to emit planar ultrasonic waves. The controller can adjust the combination and arrangement of the ultrasonic transducer array and the working parameters of a single ultrasonic transducer in real time, thereby accurately controlling the propagation and interference of the planar ultrasonic waves in space, so that they converge and overlap in the resin tank (4) to form a specific three-dimensional sound field that meets the design requirements.

3. The patterned reinforcement material 3D printing system based on acoustic manipulation technology according to claim 2, characterized in that: The frequency range of the ultrasonic transducer array is 20kHz to 100kHz, the amplitude range is 0.1mm to 1mm, and the combination of the ultrasonic transducer array can be adjusted in real time according to a preset algorithm to adapt to different sound field distribution requirements.

4. The patterned reinforcement material 3D printing system based on acoustic manipulation technology according to claim 3, characterized in that: The parameter selection range of the DLP projector (2) is: exposure time of 100ms to 500ms; layer thickness of 0.05mm to 0.2mm; and light sensitivity of 200mW / cm² to 500mW / cm².

5. A method for 3D printing of patterned reinforced materials based on acoustic manipulation technology, for manufacturing a sample of a composite material reinforced by a three-dimensional assembly structure containing reinforcing fillers, using the 3D printing system for patterned reinforced materials based on acoustic manipulation technology as described in claim 4, characterized in that: The method comprises the following steps: The material composition includes: Reinforcing fillers (1-20 vol.%), which are polymer, metal or ceramic particles with a particle size range of 1 μm to 100 μm; Photosensitive resin (80-99 vol.%), which is an acrylate-based photosensitive resin; 3D printing process for patterned distribution of acoustic field-assisted reinforced fillers: Step 1: Use computer-aided design software to design a three-dimensional model containing the patterned reinforcing filler arrangement, and clarify the distribution pattern, geometry, and size range of the patterned reinforcing filler in the three-dimensional structure; Step 2: Based on the patterned distribution characteristics of the reinforcing filler within the model, reverse analysis is performed using an acoustic simulation algorithm to convert geometric and physical information such as the distribution position, shape, and density of the patterned reinforcing filler into corresponding acoustic parameters, such as the behavior and amplitude of the sound wave. This is used to generate the basic data required for the digital acoustic hologram. The acoustic basic data is then converted into strategies for actually manipulating the sound waves, such as the digital acoustic hologram and the operating parameters of the ultrasonic transducer array. Step 3: Add the photosensitive resin into the resin tank (4) of the DLP process at one time to reach a suitable liquid level, then add an appropriate amount of reinforcing filler into the resin tank (4), and use the particle dispersion device (5) to refine the filler agglomerates by ultrasonic cavitation, so that the reinforcing filler is evenly dispersed on the surface of the photosensitive resin, ensuring that the filler can evenly respond to the sound wave during subsequent sound field manipulation; Step 4: Start the digital acoustic hologram generation device (1), and according to the previously set acoustic parameters and manipulation strategy, make the reinforcing fillers uniformly dispersed in the resin move in a directional manner, aggregate, etc. under the action of the three-dimensional sound field, and gradually assemble into a pattern corresponding to the designed patterned reinforcement structure; Step 5: Turn on the DLP curing process equipment. The DLP projector (2) projects ultraviolet light onto the bottom of the resin tank (4) according to the preset slice layer pattern, causing the resin to undergo a rapid curing reaction in the light-irradiated area. Since the reinforcing filler has been assembled into a corresponding two-dimensional pattern under the action of the acoustic field, the cured resin layer now contains the patterned reinforcement structure, thereby realizing the preparation of a composite material containing a patterned reinforcement structure in a single layer; Step 6: Repeat steps 3-5 to ensure the accuracy of the amount of reinforcing filler added in each round, so as to ensure that the quality of each layer of resin containing patterned reinforcing filler is uniform and the structure is stable. As each layer of resin containing patterned reinforcing filler is cured in sequence, the new layer of resin will undergo the same filler assembly and curing operation on the basis of the cured layer, thereby stacking to form a high-quality three-dimensional structure; Step 7: Clean and post-process the printed three-dimensional structure to obtain a sample containing a three-dimensional patterned reinforced composite material.

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