CN-121515467-B - Microparticle composite material sound auxiliary manufacturing device and method based on sound holographic technology

CN121515467BCN 121515467 BCN121515467 BCN 121515467BCN-121515467-B

Abstract

The invention discloses an acoustic assisted manufacturing device and an acoustic assisted manufacturing method for a particle composite material based on an acoustic holographic technology. The device comprises an acoustic control module and a mixed liquid container lifting mechanism, wherein the acoustic control module and the mixed liquid container lifting mechanism are both fixed on the inner bottom surface of a water tank, the mixed liquid container is arranged on the mixed liquid container lifting mechanism and used for containing mixed liquid containing particles, the acoustic control module is arranged right below the mixed liquid container and used for projecting ultrasonic waves into the mixed liquid container so as to control space arrangement of particles in the mixed liquid, the layer-by-layer curing platform lifting mechanism is arranged on one side of the water tank, the layer-by-layer curing platform is arranged on the layer-by-layer curing platform lifting mechanism and is opposite to the mixed liquid container, and a curing light source is arranged towards the mixed liquid container and used for photo-curing the mixed liquid in the mixed liquid container. According to the invention, the acoustic holographic technology and the 3D printing technology are effectively combined, and micro-nano particles in the precursor liquid can be randomly arranged in the material layer-by-layer curing process, so that the composite material with any three-dimensional structured particle arrangement can be manufactured.

Inventors

CHEN JIAN
Hua Youlong
ZHANG MENGRU
QIAO MU

Assignees

浙江大学

Dates

Publication Date: 20260508
Application Date: 20260116

Claims (6)

1. The particle composite material acoustic auxiliary manufacturing device based on the acoustic holographic technology is characterized by comprising a water tank, an acoustic control module, a mixed liquid container (17), a layer-by-layer curing platform (31), a mixed liquid container lifting mechanism, a layer-by-layer curing platform lifting mechanism and a curing light source, wherein the acoustic control module and the mixed liquid container lifting mechanism are both fixed on the inner bottom surface of the water tank, the mixed liquid container (17) is arranged on the mixed liquid container lifting mechanism, the mixed liquid container (17) is horizontally arranged and is used for containing mixed liquid containing particles, the mixed liquid container lifting mechanism is used for driving the mixed liquid container (17) to move along the vertical direction, and the acoustic control module is arranged under the mixed liquid container (17) and is used for projecting phase-modulated ultrasonic waves into the mixed liquid container (17) so as to control the spatial arrangement of the particles in the mixed liquid; The device comprises a water tank, a layer-by-layer curing platform lifting mechanism, an acoustic control module, a layer-by-layer curing platform (31), a sound holographic plate (8) and a mixed liquid container (17), wherein the layer-by-layer curing platform lifting mechanism is arranged on one side of the water tank, the layer-by-layer curing platform (31) is arranged on the layer-by-layer curing platform lifting mechanism, the layer-by-layer curing platform lifting mechanism is used for driving the layer-by-layer curing platform (31) to move along the vertical direction, the layer-by-layer curing platform (31) is opposite to the mixed liquid container (17), a curing light source is arranged towards the mixed liquid container (17) and is used for photo-curing mixed liquid in the mixed liquid container (17); The mixed liquid container (17) and the layer-by-layer curing platform (31) are hollow annular, and transparent films are fixed on the bottom surfaces of the mixed liquid container and the layer-by-layer curing platform and are used for accommodating liquid; The adhesive force of the film on the bottom surface of the layer-by-layer curing platform (31) to the cured mixed liquid is superior to that of the film on the bottom surface of the mixed liquid container (17), and the film is used for adsorbing the cured mixed liquid so that the cured mixed liquid is lifted synchronously along with the lifting of the platform; The acoustic control module further comprises an acoustic reflecting plate (2), an acoustic control module support (3) and a laser projection module, the acoustic control module support (3) is fixed on the inner bottom surface of the water tank, the plane ultrasonic transducer (4) is vertically arranged on one side of the acoustic control module support (3) and used for emitting ultrasonic waves in the horizontal direction, the acoustic reflecting plate (2) is arranged on one side of the plane ultrasonic transducer (4) which emits ultrasonic waves and is obliquely arranged inside the support (3) and used for reflecting the horizontally incident ultrasonic waves into a sound beam which is vertically upwards, the acoustic hologram plate (8) is horizontally arranged on the upper surface of the acoustic control module support (3) and is positioned between the acoustic reflecting plate (2) and the mixed liquid container (17) and used for receiving the vertically incident ultrasonic waves and modulating phases of the ultrasonic waves, the laser projection module is used for emitting preset laser patterns to the acoustic hologram plate (8) so as to change the local physical state of the acoustic hologram plate (8) and modulate the phases of the incident ultrasonic waves, and the ultrasonic waves emitted in the horizontal direction by the plane ultrasonic transducer (4) are reflected by the acoustic reflecting plate (2) and then vertically upwards enter the acoustic plate (8) so as to form holographic distribution of preset sound fields through the phase modulation of the acoustic hologram plate (8).
2. The device for the acoustically assisted production of a particulate composite material based on the technique of acoustic holography according to claim 1, characterized in that said acoustic holographic plate (8) is divided into N x N acoustic holographic units, each having two states, crystalline and amorphous, which are reversibly variable with temperature; the amorphous acoustic holographic unit is formed by melting the crystalline acoustic holographic unit under the irradiation of laser beams emitted by the laser projection module.
3. The device for the acoustically assisted production of particulate composite material based on the technique of acoustic holography according to claim 1, characterized in that the thickness of the acoustic holographic plate (8) satisfies the following formula: φ=arg(P c -P a )=π P a =e i(2πhf/va) P c =e i(2πhf/vc) wherein phi represents the phase difference of the transmission sound fields of the molten state unit and the crystalline state unit, P a and P c represent the transmission sound fields of the molten state unit and the crystalline state unit respectively, arg () represents the phase of complex numbers, h represents the thickness of the acoustic hologram (8), f represents the frequency of ultrasonic waves emitted by the planar ultrasonic transducer (4), e represents the natural logarithmic base number, i represents the imaginary number unit, and va and vc represent the sound velocity of the acoustic hologram (8) in the molten state unit and in the crystalline state unit respectively.
4. The acoustic holographic technology-based particle composite acoustic assisted manufacturing device of claim 1, wherein the layer-by-layer curing platform lifting mechanism and the layer-by-layer curing platform lifting mechanism are both slide rails.
5. A method of acoustically assisted manufacturing a particulate composite material using an acoustic holographic technique for assisting manufacturing apparatus as claimed in any one of claims 1 to 4, the method comprising the steps of: S1, adding water into a water tank and a layer-by-layer curing platform (31) so that the distance between the water surface in the water tank and an acoustic hologram plate (8) is equal to a preset target sound field focal length; S2, adding a preset volume of mixed liquid containing particles into the mixed liquid container (17), adjusting the height of the mixed liquid container (17) to enable the water surface of the mixed liquid in the mixed liquid container (17) to be level with the water surface in the water tank, and further adjusting the height of the layer-by-layer curing platform (31) to enable the lower surface of the layer-by-layer curing platform (31) to be in contact with the water surface of the mixed liquid; S3, processing and converting according to the target particle arrangement pattern to obtain a laser irradiation distribution pattern, and irradiating laser to the acoustic holographic plate (8) by the laser projection module according to the laser irradiation distribution pattern; S4, starting the planar ultrasonic transducer (4) and the curing light source until the mixed solution containing the particles is cured to obtain a curing layer with a target particle arrangement pattern, lifting the layer-by-layer curing platform (31), and driving the curing layer attached to the lower surface of the layer-by-layer curing platform (31) to be synchronously lifted; S5, replacing the target particle arrangement patterns, and repeating the steps S2 to S4 until the curing of all the curing layers of the preset target particle arrangement patterns is completed, so as to obtain the formed part with all the preset target particle arrangement patterns.
6. The method for acoustically assisting the manufacture of a composite material of particles based on the acoustic holographic technique as set forth in claim 5, wherein said step S3 is specifically: s3.1, processing according to a preset target particle arrangement pattern to obtain target sound pressure amplitude distribution; s3.2, processing by adopting an iterative angular spectrum method according to the target sound pressure amplitude distribution to obtain the phase distribution of the acoustic holographic plate (8); S3.3, performing binarization treatment on the phase distribution of the acoustic holographic plate (8) to obtain a laser irradiation distribution pattern; s3.4, the laser projection module irradiates laser to the acoustic hologram (8) according to the laser irradiation distribution pattern.

Description

Microparticle composite material sound auxiliary manufacturing device and method based on sound holographic technology Technical Field The invention relates to the field of composite material processing, in particular to an acoustic assisted manufacturing device and an acoustic assisted manufacturing method for a particle composite material based on an acoustic holographic technology. Background Engineering materials aligned with a particular pattern of micro-nanoparticles may exhibit unique mechanical, electrical, thermal, acoustic, and electromagnetic properties due to the particular type, geometry, and spatial pattern of embedded particles. These materials are designed for use in stealth, sub-wavelength imaging, and multi-functional composites with tailored electrical and mechanical properties, among others. The application in soft robots, electronics, batteries and biomedical science is wide, especially in the field of flexible electronic components and devices. 3D printing is a common additive manufacturing method that can rapidly manufacture materials with complex structures. The use of external physical fields to assemble functional micro/nano particles or fibers directly in a polymer in conjunction with 3D printing techniques is an efficient method of manufacturing functional composites. A common approach to microparticle patterning is to use an electric or magnetic field for control, but it requires conductive and ferromagnetic particles, respectively, which not only limits the choice of materials but also limits scalability in the manufacturing process. The distribution of the nanomaterial in the fluid medium can be directly manipulated due to the presence of certain acoustic radiation forces in the acoustic field. Then, a learner proposed to pattern micro-nano particles using sound waves, and then to cure the micro-nano particles using a curing light source after patterning. However, in the prior art, the surface acoustic waves are used for arranging the particles, and the particles can only be arranged into regular arrays such as transverse lines, oblique lines and the like in a plane. Composite material particles manufactured by using the surface acoustic waves are single in arrangement and limited in use scene. In order to make up for the defect of capturing particles by the surface acoustic wave, the acoustic holographic technology has been developed, which records the phase or amplitude information of a target holographic sound field at the positions of two-dimensional spatially arranged acoustic holographic pixel units by calculation, and realizes the reconstruction of the target sound field under specific incidence conditions. At present, researchers have processed and prepared polymer super surfaces with variable thickness, called acoustic holographic phase plates, through 3D printing technology, and freely regulate and reconstruct any complex sound field. Because the acoustic hologram is fixed in shape, only a single holographic sound field can be achieved. Therefore, there is a need to develop a method of producing acoustically assisted particulate composites with reconfigurable acoustic holographic techniques. Disclosure of Invention Aiming at the problems, the prior acoustic auxiliary additive manufacturing technology has single function and limited use field, and a high-molecular material acoustic holographic plate prepared by using crystalline polymers and a traditional high-precision mobile platform are effectively combined with the acoustic holographic technology and the 3D printing technology, micro-nano particles in precursor liquid can be randomly arranged in the material layer-by-layer curing process, and a composite material with random three-dimensional structured particle arrangement can be manufactured. The technical scheme adopted by the invention is as follows: The device comprises a water tank, an acoustic control module, a mixed liquid container, a layer-by-layer curing platform, a mixed liquid container lifting mechanism, a layer-by-layer curing platform lifting mechanism and a curing light source, wherein the acoustic control module and the mixed liquid container lifting mechanism are both fixed on the inner bottom surface of the water tank, the mixed liquid container is arranged on the mixed liquid container lifting mechanism and is horizontally arranged for containing mixed liquid containing particles, the mixed liquid container lifting mechanism is used for driving the mixed liquid container to move along the vertical direction, and the acoustic control module is arranged under the mixed liquid container and is used for projecting phase-modulated ultrasonic waves into the mixed liquid container so as to control the spatial arrangement of the particles in the mixed liquid; the layer-by-layer curing platform lifting mechanism is arranged on one side of the water tank, the layer-by-layer curing platform is arranged on the layer-by-layer curing platform lifting mechan