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

Abstract

The invention provides a patterned reinforcing material 3D printing method and system based on an acoustic manipulation technology, relates to the combination of the acoustic manipulation technology and a digital light processing (DLP) technology, and is used for manufacturing a composite material sample piece containing patterned reinforcing filler distribution. According to the technology, a three-dimensional model is designed through computer aided design software, plane ultrasonic waves are converted into a specific three-dimensional sound field through a digital acoustic hologram, and accurate control over reinforcing filler in photosensitive resin is achieved. The acoustic control system controls the distribution of the reinforcing filler, and the DLP projector is used for curing the composite material layer by layer. The method allows the digital acoustic hologram to be adjusted in real time so as to adapt to different reinforcing filler patterning assembly and reinforcing requirements. According to the technical scheme, the control capability of 3D printing on reinforcing filler distribution is improved, and the application field of the composite material is widened.

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 field of modern materials science and manufacturing technology, 3D printing, as an emerging additive manufacturing technology, has shown great potential and broad application prospects. It can build three-dimensional entities of complex shapes layer by layer based on digital design models, and has gradually been applied and promoted in many industries such as aerospace, biomedicine, automotive industry, consumer electronics, etc.

[0003] Traditional 3D printing technology often faces many challenges when manufacturing parts with high performance requirements. For 3D printing of composite materials, the uniformity and orderliness of the distribution of reinforcement materials in the printing matrix have a decisive influence on the performance of the final product. However, in most existing 3D printing processes, such as fused deposition modeling (FDM), selective laser sintering (SLS) and ordinary light-curing 3D printing, reinforcement materials are usually simply mixed with the matrix material before printing, and it is difficult to achieve precise control and patterned arrangement of them at the microscale. This random or disordered distribution of reinforcement materials limits the further improvement of the performance of composite materials, fails to fully tap the potential of reinforcement materials, and is difficult to meet some high-end application scenarios that have special requirements for the mechanical properties, physical properties or functionality of materials. 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 is 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: A 3D printing system for patterned reinforcement materials based on acoustic manipulation technology, the specific features of which are as follows, including: DLP molding device, used to cure photosensitive resin to form each layer of 3D printed object, its key components include DLP projector, molding platform and resin tank, DLP projector is usually located above the device, its lens is facing downward, its function is to project the preset two-dimensional pattern in the form of light onto the surface of the photosensitive resin below, the resin tank is located directly below the DLP projector, it is a container for holding photosensitive resin, the resin tank usually has good light transmittance, so that the light projected by the DLP projector can pass smoothly and irradiate the photosensitive resin inside, so as to promote the photocuring reaction of the resin, the molding platform is placed inside the resin tank, and the initial position is located at a certain distance above the bottom of the resin tank, at the beginning of the printing process, the molding platform surface will contact the photosensitive resin, as the printing progresses, after each layer of resin is cured, the molding platform will drop according to the preset distance, so that a new layer of photosensitive resin covers the cured layer, so as to carry out the curing molding of the next layer, until the entire 3D printed object is completed; The digital acoustic hologram generation device is located at the bottom of the resin tank in the DLP molding device. It 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 and the digital acoustic hologram generation device are two important components. They are located at the bottom of the resin tank at the same time. 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 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. The operating frequency is in 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.

[0006] Furthermore, the digital acoustic hologram generating device further comprises: Ultrasonic transducer array, as the core component, is responsible for transmitting and receiving ultrasonic signals. Its arrangement and number should be 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 so that it emits a planar ultrasonic wave; 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, so as to accurately control 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.

[0007] 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. Among them, the working parameter selection range of the DLP projector is exposure time 100ms to 500ms; layer thickness is 0.05mm to 0.2mm; photosensitivity is 200mW / cm² to 500mW / cm².

[0008] In other words, a method for 3D printing of patterned reinforcement materials based on acoustic manipulation technology includes: The material composition includes: Reinforcing fillers (1-20 vol.%), which are polymer, metal or ceramic particles, with a particle size ranging from 1 micron to 100 microns; Photosensitive resin (80-99 vol.%) is an acrylate-based photosensitive resin.

[0009] 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 style, geometric shape, and size range of the patterned reinforcing filler in the three-dimensional structure; Step 2: According to the patterned distribution characteristics of the reinforcing filler in the model, reverse analysis is performed through the acoustic simulation algorithm to convert the geometric and physical information such as the distribution position, shape, density, etc. of the patterned reinforcing filler into corresponding acoustic parameters, such as the behavior and amplitude of the sound wave, so as to generate the basic data required for the digital acoustic hologram, and convert the acoustic basic data into the actual strategy for manipulating the sound wave, such as the shape of the acoustic hologram and the working parameters of the ultrasonic transducer array; Step 3: Add the photosensitive resin into the resin tank of the DLP process at one time to reach the appropriate liquid level. Then add an appropriate amount of reinforcing filler into the resin tank, and use the particle dispersion device to refine the filler agglomerates by ultrasonic cavitation, so that the reinforcing filler is evenly dispersed on the surface of the photosensitive resin to ensure that the filler can evenly respond to the sound wave during the subsequent sound field manipulation; Step 4: Start the digital acoustic hologram generation device, and according to the previously set acoustic parameters and manipulation strategies, make the uniformly dispersed reinforcing fillers 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 reinforcing structure; Step 5. Turn on the DLP curing process equipment. The DLP projector projects ultraviolet light to the bottom of the resin tank according to the preset slice layer pattern, so that the resin undergoes a rapid curing reaction in the light irradiated area. Since the reinforcing filler has been assembled into a corresponding pattern under the action of the acoustic field, the cured resin layer now contains a 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 turn, a new layer of resin will perform the same filler assembly and curing operation on the basis of the cured layer, thereby forming a high-quality three-dimensional structure for the final stacking; Step 7: Clean and post-process the printed three-dimensional structure to finally obtain a sample containing a three-dimensional patterned reinforced composite material.

[0010] The beneficial effects of the present invention are: 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 move and aggregate in a directional manner under the action of the sound field, thereby achieving patterned distribution and giving full play to the potential of 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

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 creative work.

[0012] Figure 1 This is a schematic diagram of the overall process of a method for 3D printing of patterned reinforcement materials based on acoustic manipulation technology according to the present invention; Figure 2 A patterned reinforcement material 3D printing system based on acoustic manipulation technology according to the present invention; Figure 3 The ultrasonic transducer array in the digital acoustic hologram generating device involved in the present invention; Figure 4 Schematic diagram of the preparation of a single-layer structure of a three-dimensional sample containing a complex patterned enhanced framework material as described in the present invention.

[0013] The reference numerals in the figures indicate: Digital acoustic hologram generation device 1, DLP projector 2, molding platform 3, resin tank 4, particle dispersion device 5 DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0015] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0016] See also Figure 1 A patterned reinforced material 3D printing system based on acoustic manipulation technology is proposed. Figure 2 As shown, specifically including, The DLP molding device is used to cure the photosensitive resin to form each layer of the 3D printed object. Its key components include a DLP projector 2, a molding platform 3 and a resin tank 4. The DLP projector 2 is usually located above the device with its lens facing downward. Its function is to project a preset two-dimensional pattern onto the surface of the photosensitive resin below in the form of light. The resin tank 4 is located directly below the DLP projector 2. It is a container for holding photosensitive resin. The resin tank usually has good light transmittance so that the light projected by the DLP projector can pass smoothly and irradiate the photosensitive resin inside, prompting the resin to undergo a photocuring reaction. The molding platform 3 is placed inside the resin tank 4, and the 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 proceeds, after each layer of resin is cured, the molding platform will drop according to a preset distance, so that a new layer of photosensitive resin covers the cured layer, so as to carry out the curing molding of the next layer until the entire 3D printed object is completed.

[0017] The 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 2 are two important components, and are located at the bottom of the resin tank 4 at the same time. 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 dispersing device 5 includes 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 in 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.

[0018] Furthermore, the digital acoustic hologram generating device 1 further comprises: Ultrasonic transducer array ( Figure 3 ), as the core component, is responsible for transmitting and receiving ultrasonic signals. Its layout and quantity need to be 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 so that it emits a planar ultrasonic wave; 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, so as to accurately control 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.

[0019] 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. The working 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.

[0020] In other words, a method for 3D printing of patterned reinforcement materials based on acoustic manipulation technology includes: The material composition includes: Reinforcing fillers (1-20 vol.%), which are polymer, metal or ceramic particles, with a particle size ranging from 1 micron to 100 microns; Photosensitive resin (80-99 vol.%) is an acrylate-based photosensitive resin.

[0021] 3D printing process for patterned distribution of acoustic field-assisted reinforced fillers ( Figure 1 ): Step 1: Use computer-aided design software to design a three-dimensional model containing the patterned reinforcing filler arrangement, and clarify the distribution style, geometric shape, and size range of the patterned reinforcing filler in the three-dimensional structure; Step 2: According to the patterned distribution characteristics of the reinforcing filler in the model, reverse analysis is performed through the acoustic simulation algorithm to convert the geometric and physical information such as the distribution position, shape, density, etc. of the patterned reinforcing filler into corresponding acoustic parameters, such as the behavior and amplitude of the sound wave, so as to generate the basic data required for the digital acoustic hologram, and convert the acoustic basic data into the actual strategy for manipulating the sound wave, such as the shape of the acoustic hologram and the working 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 to ensure that the filler can evenly respond to the sound wave during the subsequent sound field manipulation; Step 4: Start the digital acoustic hologram generating device 1, and according to the previously set acoustic parameters and manipulation strategies, 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 reinforcing structure; Step 5, start the DLP curing process equipment, and the DLP projector 2 projects ultraviolet light to the bottom of the resin tank 4 according to the preset slice layer pattern, so that the resin undergoes a rapid curing reaction in the light irradiated area. Since the reinforcing filler has been assembled into a corresponding pattern under the action of the acoustic field, the cured resin layer now contains a 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 adding photosensitive resin, reinforcing filler amount and parameters 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, a new layer of resin will perform the same filler assembly and curing operation on the basis of the cured layer, thereby forming a high-quality three-dimensional structure for the final stacking; Step 7: Clean and post-process the printed three-dimensional structure to finally obtain a sample containing a three-dimensional patterned reinforced composite material.

[0022] A more preferred first embodiment of the method of the present application is as follows: 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.

[0023] Three-dimensional model construction: Use computer-aided design software to design a three-dimensional model containing the arrangement of patterned reinforcing fillers, and clarify the distribution style, geometry, and size range of the patterned reinforcing fillers in the three-dimensional structure; Reverse analysis: Based on the patterned distribution characteristics of the reinforcing filler in the model, reverse analysis is performed through the acoustic simulation algorithm to convert the geometric and physical information such as the distribution position, shape, density, etc. of the patterned reinforcing filler into corresponding acoustic parameters; Material dispersion: Add the photosensitive resin into the resin tank 4 of the DLP process at one time to reach a suitable liquid level. Then add a proper 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 to ensure that the filler can evenly respond to the sound wave during the subsequent sound field manipulation; Hologram generation: According to the previously set acoustic parameters and manipulation strategies, the reinforcing fillers evenly dispersed in the resin are oriented and aggregated under the action of the three-dimensional sound field, and gradually assembled into a pattern corresponding to the designed patterned reinforcement structure. The frequency selection range of the ultrasonic transducer array is 20kHz to 100kHz, and the amplitude range is 0.1mm to 1mm; DLP curing: DLP projector 2 projects ultraviolet light to the bottom of resin tank 4 according to the preset slice layer pattern, so that the resin undergoes a rapid curing reaction in the light irradiated area. The curing exposure time for each layer is 200ms; the layer thickness is 0.1mm; the photosensitivity is 200mW / cm², and the cured resin layer contains a patterned reinforcement structure.

[0024] Repeat the three steps of material dispersion-hologram generation-DLP curing to finally obtain a sample with a three-dimensional pattern enhancement ( Figure 4 ).

[0025] It should be noted that: according to the embodiments of the patent of the present invention as described above, these embodiments do not describe all the details in detail, nor do they limit the patent of the invention to only the specific embodiments described. Obviously, according to the above description, many modifications and changes can be made. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope 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 technicians in the relevant technical field can make good use of the present invention and the modified use based on the present invention. The present invention is only limited 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 photosensitive resin to form each layer of a 3D printed object. Its key components include a DLP projector (2), a molding platform (3) and a resin tank (4). The DLP projector (2) is located above the device with its lens facing downward. Its function is to project a preset two-dimensional pattern in the form of light onto the surface of the photosensitive resin below. The resin tank (4) is located directly below the DLP projector (2). It is a container for containing photosensitive resin. The resin tank usually 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 proceeds, after each layer of resin is cured, the molding platform will descend 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 performed 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 planar 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 (2) 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 dispersing 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 of the ultrasonic transducers is within the range of 20 kHz to 100 kHz, and the power is set between 50 W and 500 W. On the one hand, the ultrasonic transducers are strong enough to destroy the agglomerates formed by the reinforcing filler so that the filler can be fully dispersed; on the other hand, the ultrasonic transducers can avoid unnecessary excessive damage to the structure of the photosensitive resin due to excessive energy.

2. The patterned reinforced 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 arrays 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 so that it emits 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 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 reinforced 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 100 ms to 500 ms; layer thickness of 0.05 mm to 0.2 mm; and light sensitivity of 200 mW / cm² to 500 mW / cm².

5. A method for 3D printing of patterned reinforced materials based on acoustic manipulation technology, used to manufacture samples of reinforced composite materials containing three-dimensional assembly structures of reinforced fillers, 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 ranging from 1 micron to 100 microns; 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 style, geometric shape, and size range of the patterned reinforcing filler in the three-dimensional structure; Step 2: According to the patterned distribution characteristics of the reinforcing filler in the model, reverse analysis is performed through the acoustic simulation algorithm to convert the geometric and physical information such as the distribution position, shape, density, etc. of the patterned reinforcing filler into corresponding acoustic parameters, such as the behavior and amplitude of the sound wave, so as to generate the basic data required for the digital acoustic hologram, and convert the acoustic basic data into the actual strategy for manipulating the sound wave, such as the digital acoustic hologram and the working 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 height, 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 the subsequent sound field manipulation; Step 4: Start the digital acoustic hologram generation device (1), and according to the previously set acoustic parameters and manipulation strategies, 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, start the DLP curing process equipment, the DLP projector (2) projects ultraviolet light to the bottom of the resin tank (4) according to the preset slice layer pattern, so that the resin undergoes 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 reinforcing structure, thereby realizing the preparation of a composite material containing a patterned reinforcing 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, a new layer of resin will be subjected to 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 finally obtain a sample containing a three-dimensional patterned reinforced composite material.

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