Preparation device and preparation method of capsule composite material

Abstract

The invention discloses a preparation device and method for a capsule composite material, and the method comprises the steps: carrying out the light curing of a photosensitive composite material, and forming a capsule shell; the capsule inner core is formed by performing sound curing on the sound-sensitive composite material in the capsule shell. Light curing and sound energy additive manufacturing are combined and divided into different procedures, for example, a capsule shell can be firstly subjected to light curing, and then the capsule shell is filled and subjected to sound action on internal particle composite colloid; or the capsule inner core is formed through sound curing, and then the capsule shell is formed through light curing. Wherein photocuring has the advantage of high precision, sound waves have the advantage of high penetrating power, the capsule shell does not have the phenomena of cracks, stress concentration, fracturing and the like under the action of the sound waves, and through step-by-step processing of sound and light, the processing efficiency of parts with complex structures can be greatly improved, and the manufacturing link can be simplified; the method has the advantages of energy conservation, environmental protection, simple process, low cost and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of capsule material preparation, and in particular to a preparation device and method of a capsule composite material. Background Art

[0002] Capsule composite materials are one of the emerging manufacturing technologies. Capsules refer to the use of monomers to generate water-insoluble polymers by changing conditions, and the generated polymers encapsulate solids, liquids or gases in them. A tiny container with a core-shell structure is formed. Different from traditional manufacturing technology, it is a technology that uses a capsule shell to encapsulate the internal material of the composite structure. It is of great significance to improve production efficiency, improve manufacturing accuracy, reduce sample development time, and shorten the R&D cycle. This technology has made significant contributions and application prospects in the production fields of large-scale integrated circuits, aerospace, powder metallurgy, medical devices, building materials, etc.

[0003] At present, the material manufacturing processes of capsule structures include suspension polymerization, interfacial polymerization, in-situ polymerization, emulsion polymerization, etc.; resin, paraffin, agar, various colloids and other materials are usually used as the capsule core, and the external material is polymerized on the surface of the capsule core to form the capsule shell. However, the capsule wall of traditional microcapsules is mainly composed of polymers. On the one hand, due to the characteristics of its natural structural defects, tiny damage is inevitably caused during the preparation process, forming micro cracks, which reduces the working performance of the structural parts. On the other hand, under the influence of complex working conditions and external environment during service operation, new cracks will appear in the structural parts and expand, eventually leading to failure damage of the structural parts; the stability and mechanical properties are poor, and it is very easy to be damaged under the influence of complex environment and working conditions.

[0004] Although polymerized microcapsule technology has been widely used, it is greatly limited in particle size. The particle size of existing polymerized microcapsules before polymerization is too large, which makes them infeasible for practical application in many aspects.

[0005] The photocuring method is to irradiate the material with short-wavelength light such as ultraviolet light, so that the material undergoes a certain degree of physicochemical reaction and changes its physical state, usually from liquid or semi-liquid to solid. Photocuring technology is in a relatively complete state, and the processing accuracy and efficiency are satisfactory, and it can be used in various production links. The advantages are not limited to high automation level, high processing accuracy, and the ability to process materials with complex structures. However, this technology still has shortcomings. For example, photocurable materials such as resins are easily affected by external factors during the molding process, which reduces the curing quality. The physical properties of parts made of some photosensitive materials are poor. In addition, the penetration of ultraviolet light cannot process the inside of the molded surface, and capsule composite materials cannot be directly generated.

[0006] As an emerging manufacturing method, acoustic energy additive manufacturing has been put into practice in many aspects such as parts manufacturing. The materials that can be processed by sound waves are generally thermosetting. In the processing engineering, the physical and chemical properties of the materials change under the action of sound waves and turn into a solid state. Similar to 3D printing technology, it can be used for macroscopic processing. Its advantage is high degree of freedom, but the biggest drawback is the lack of processing accuracy, and it is impossible to directly generate capsule composite materials. Summary of the invention

[0007] The present invention aims to solve at least one of the problems in the related art to a certain extent. To this end, one of the purposes of the present invention is to provide a method for preparing a capsule composite material, wherein a capsule shell is generated by photocuring, and a capsule core is generated by the characteristics of acoustic wave space curing, thereby combining the advantages of photocuring and acoustic curing to form a capsule composite material.

[0008] In order to achieve the above purpose, this application adopts the following technical solutions:

[0009] A method for preparing a capsule composite material comprises: forming a capsule shell by photocuring a photosensitive composite material; and forming a capsule core by acoustically curing an acoustically sensitive composite material inside the capsule shell.

[0010] Further, the method comprises: performing photocuring on the photosensitive composite material to form a preliminary shell; a feed hole is reserved in the preliminary shell;

[0011] The sound-sensitive composite material is poured into the preliminary shell from the feeding hole, and the photosensitive composite material at the feeding hole is photocured to form a capsule shell with the sound-sensitive composite material poured inside;

[0012] The acoustically sensitive composite material is acoustically cured to form the inner core of the capsule.

[0013] Furthermore, the photosensitive composite material comprises a photosensitive resin, a free radical prepolymer and a photosensitizer, and the mass fraction of the photosensitizer is 0.5-3wt%.

[0014] Furthermore, the acoustically sensitive composite material includes a thermosetting resin, a toughening agent and a plasticizer.

[0015] Furthermore, the acoustic-sensitive composite material and the photosensitive composite material also include a particle additive, and the particle additive includes at least one of metal oxide powder, ceramic powder, composite material, and diamond powder.

[0016] Furthermore, the hardness of the capsule shell is between 78-85D, and the hardness and thickness of the capsule shell increase with increasing illumination capacity, increase with decreasing molding time, and increase with increasing illumination time.

[0017] Furthermore, the hardness of the capsule core increases with increasing sonic power and increases with shortening curing time.

[0018] Furthermore, the inner surface of the capsule shell is a smooth surface.

[0019] The present application provides a device for preparing a capsule composite material, comprising an acoustic wave generating device and a photosensitive printer; the photosensitive printer comprises a liquid storage tank, a light source generator, and a first motion control component, the first motion control component and the light source generator are electrically connected, a first clamp is provided on the side of the liquid storage tank, the first clamp is used to clamp a capsule shell, and the first motion control component is used to control the movement of the light source generator to form a capsule shell.

[0020] Furthermore, the sound wave generating device includes a sound wave generating component, a second motion control component and a sound head, the second motion control component and the sound head are electrically connected, and the second motion control component is used to control the sound head to move along the outside of the capsule shell; the sound wave generating component is electrically connected to the sound head.

[0021] The present application provides a method for preparing a capsule composite material, comprising: forming a capsule shell by photocuring a photosensitive composite material; forming a capsule core by acoustically curing the acoustically sensitive composite material inside the capsule shell. The present application combines photocuring with acoustic energy additive manufacturing and is divided into different processes. For example, the capsule shell can be photocured first, and then filled and acoustically acted on the internal particle composite colloid; or the capsule core can be acoustically cured first, and then the capsule shell can be photocured. Among them, photocuring has the advantage of high precision, and sound waves have the advantage of strong penetrating power. The capsule shell will not have cracks, stress concentration, cracking, etc. under the action of sound waves. Through the step-by-step processing of sound and light, the processing efficiency of complex structural parts can be greatly improved and the manufacturing process can be simplified. It has the advantages of energy saving and environmental protection, simple process, and low cost.

[0022] The second purpose of the present application is to provide a preparation device for capsule composite materials, including an acoustic wave generator and a photosensitive printer; the photosensitive printer includes a liquid storage tank, a light source generator, and a first motion control component, the first motion control component and the light source generator are electrically connected, a first clamp is provided on the side of the liquid storage tank, the first clamp is used to clamp the capsule shell, and the first motion control component is used to control the movement of the light source generator to form the capsule shell. The present application integrates the acoustic wave generator and the photosensitive printer in the same device to realize the step-by-step production of light curing and acoustic curing. By regulating the acoustic wave parameters and the light parameters, the performance and morphology of the molding material can be greatly regulated, and the advantages of high optical manufacturing precision and strong sound penetration ability are comprehensively utilized to realize the preparation of high-performance capsule composite materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0025] In the attached figure:

[0026] Figure 1 A schematic diagram of the preparation method of this application;

[0027] Figure 2 This is a schematic diagram of the structure of the photosensitive printer of this application;

[0028] Figure 3 This is a schematic diagram of the structure of the sound wave generating device of the present application;

[0029] Figure 4 This is a schematic diagram of the structure of the overall device of this application.

[0030] Figure numbers: 11, first motion control component; 12, lead screw; 13, light source generator; 14, fastening screw; 15, liquid storage tank; 16, molding platform; 21, second motion control component; 211, X-axis guide rail; 212, Y-axis bracket; 213, Z-axis robot arm; 22, sound head; 23, sound wave generating component; 24, second fixture. DETAILED DESCRIPTION

[0031] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the mechanism or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0032] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0033] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, mechanisms, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0034] Example 1

[0035] The present application provides a method for preparing a capsule composite material, which forms a capsule shell by photocuring a photosensitive composite material; and forms a capsule core by acoustically curing an acoustically sensitive composite material inside the capsule shell.

[0036] The capsule composite material in the present application is prepared by light curing and sound curing in steps, which can be performed by light curing first and then sound curing, specifically including:

[0037] S1: performing photocuring on the photosensitive composite material to form a preliminary shell; a feed hole is reserved in the preliminary shell;

[0038] S2: pouring the sound-sensitive composite material into the interior of the preliminary shell from the feed hole, and photocuring the photosensitive composite material at the feed hole to form a capsule shell with the sound-sensitive composite material poured inside;

[0039] S3: acoustically curing the acoustically sensitive composite material to form a capsule core.

[0040] As another embodiment, the method of first acoustic curing and then light curing may be used, which specifically includes:

[0041] S1: acoustically curing the acoustic sensitive composite material to form a capsule core;

[0042] S2: Taking the capsule inner core as a reference, photocuring the photosensitive composite material on the outer side of the capsule inner core is performed to form a capsule outer shell.

[0043] This application combines photocuring with acoustic energy additive manufacturing, and is divided into different processes, first photocuring the capsule shell, and then filling and acoustically acting on the internal particle composite colloid. Among them, photocuring has the advantage of high precision, and sound waves have the advantage of strong penetration. The capsule shell will not have cracks, stress concentration, cracking, etc. under the action of sound waves. Through the step-by-step processing of sound and light, it can greatly improve the processing efficiency of complex structural parts and simplify the manufacturing process. It has the advantages of energy saving and environmental protection, simple process, and low cost.

[0044] This application utilizes the advantage of acoustic energy additive manufacturing that can penetrate existing surfaces to process the inside of parts, which is used to make up for the defect that photocuring cannot process the inside of capsule materials. It also avoids the single processing technology that can only be processed from the inside out when single photocuring forms functional step materials, thereby improving the functional diversification selection of functional step materials, especially the performance of capsule composite materials.

[0045] The photosensitive composite material in the present application includes a photosensitive resin, a free radical prepolymer and a photosensitizer, and the mass fraction of the photosensitizer is 0.5-3wt%. The addition of the free radical prepolymer can increase the mechanical strength of the capsule shell after photocuring. The photosensitizer uses aromatic ketones or acetophenones and their derivatives. The photosensitizer can accelerate the shell molding speed, but excessive photosensitizer will cause the shell strength to decrease. When the mass fraction of the photosensitizer is 0.5wt%, 1wt%, 1.5wt%, 2wt%, 2.5wt%, and 3wt%, respectively, the curing effect and product mechanical properties are good; when the photosensitizer content is lower than 0.5wt%, the curing effect is poor; when the photosensitizer concentration continues to rise, the polymer gel formed on the surface of the photosensitive resin blocks light, and the degree of curing decreases with the increase of the photosensitizer concentration; therefore, it is necessary to make a proportion according to the production speed and strength requirements. The photosensitive composite material in the present application also includes a granular additive, and the granular additive includes at least one of metal oxide powder, ceramic powder, composite material, and diamond powder. The granular additive is used to adjust the stiffness and hardness of the photosensitive composite material after molding.

[0046] The acoustic composite material of the present application includes a thermosetting resin, a toughening agent and a plasticizer. The main components of the acoustic composite material include but are not limited to thermosetting resins, such as polydimethylsiloxane resin (PDMS), epoxy resin, acrylate, etc. Preferably, the thermosetting resin is specifically selected from PDMS, which can be formed under the action of sound and is not affected by light. The photosensitive resin of the shell of the capsule of the present invention is not affected during the acoustic action process, and the internal PDMS is not affected when the shell is photocured. Therefore, the production process can be selected according to demand to determine the production order of the shell and the interior. Specifically, the capsule shell can be generated first, the acoustic composite material can be poured through the reserved feed hole, and then the acoustic composite material can be acoustically cured through the capsule shell. Or the acoustic composite material can be acoustically cured first to form a capsule core; then, based on the capsule core, the photosensitive composite material is photocured on its outside to form a capsule shell.

[0047] The present invention can adjust the rigidity and hardness of the outer shell to be lower than that of the inner shell, that is, when an external force acts on the capsule composite material, the force can be controlled to cause only a certain degree of deformation and displacement on the capsule surface, without causing deformation and displacement inside the capsule.

[0048] The hardness of the capsule shell described in the present application is between 78-85D. The hardness and thickness of the capsule shell increase with the increase of illumination capacity, increase with the decrease of molding time, and increase with the increase of illumination time. At the same time, by adjusting the speed of light curing, the degree of curing of the photosensitive composite material can be changed. For example, when the light curing printing speed is reduced, the degree of light curing will decrease. The present application uses MSLA stereolithography technology to photocure the photosensitive composite material. The XY axis resolution is 19×24μm, the Z axis accuracy is 0.02mm, the UV light wavelength is 250-402nm, the curing speed is 150mm / h, and the light power density is selected as 12.74mW / cm 2 , the exposure time is 3 seconds.

[0049] The hardness of the capsule core of the present application increases with the increase of the sound wave power and increases with the shortening of the curing time, which is attributed to the fact that the degree of sonic curing is related to the intensity and amplitude of the sound wave. The present application can use an ultrasonic generator with an input voltage of AC220 for sonic curing, with an optional frequency range of 25-40kHz and an output power range of 600-900W. The frequency selection standard is determined by the precision requirements of the outer shell and internal materials after the manufacturing is completed. When the precision requirements of the finished product are high, the frequency should be appropriately increased.

[0050] The capsule composite material of the present application is a unified body formed by adsorption, covalent bond and other methods between the capsule shell and the capsule core. In order to make the morphology of the junction between the capsule shell and the capsule core controllable, the degree of binding between the capsule shell and the capsule core can be changed by adjusting the acoustic curing parameters and / or light curing parameters, or by adjusting the curing state of the acoustic sensitive composite material in the capsule core. To improve the degree of binding at the interface, the inner surface of the capsule shell can be designed into a relatively smooth interface through the photocuring input model, so as to improve the degree of binding between the PDMS inside the capsule and the shell after curing. Or by extending the time of the acoustic action to more than 120s and less than 150s (to prevent the PDMS from overheating and denaturing due to the long acoustic action time), the degree of binding between the PDMS and the shell at the rough surface can be significantly improved. The high precision of light curing can make up for the short board of low precision of acoustic energy additive manufacturing, first forming the shell, and then acting on the internal colloid; or first forming a part of the internal colloid, and then forming the shell; the surface quality, physical properties and microstructure of the capsule composite material are improved.

[0051] Example 2

[0052] The present application provides a preparation device for a capsule composite material, comprising a sound wave generating device and a photosensitive printer; Figure 2-Figure 4 shown.

[0053] The photosensitive printer includes a liquid storage tank 15, a light source generator 13, and a first motion control component 11. The first motion control component 11 is electrically connected to the light source generator 13. A first clamp is provided on the side of the liquid storage tank 15. The first clamp is used to clamp the capsule shell. The first motion control component 11 is used to control the movement of the light source generator 13 to form the capsule shell.

[0054] The photosensitive printer of the present application can be specifically fixed in the molding platform 16. The molding platform 16 can move in the three-axis directions of X, Y, and Z, and is controlled by the machine tool motion control panel. The working area is divided according to the size of the capsule composite material, and usually a single-axis (X-axis) translational movement is performed within a square area of ​​10-20 mm. The capsule composite material to be processed is fastened by a first clamp, and a high-speed camera can be installed obliquely below the molding platform 16 to observe and analyze the processing status in real time.

[0055] In the present application, the liquid reservoir 15 contains a photosensitive composite material, and the light source generator 13 is located above the liquid reservoir 15, and is used to generate a planar array of light to act on a specific position in the liquid reservoir 15 to achieve the curing of the photosensitive composite material. The light source generator 13 is connected to the first motion control component 11 through the screw 12, and the first motion control component 11 can drive the light source generator 13 to rise and fall in the vertical direction to adjust the distance between the light source generator 13 and the liquid reservoir 15. Figure 2 As shown, the light source generator 13 is fixed in the fixing plate by means of a fastening screw 14 , and the other end of the fixing plate is fixed in the screw rod 12 , and the screw rod 12 is connected to the first motion control component 11 .

[0056] The light source generator 13 includes a light energy generator and a light energy transducer. The light energy generator generates a light signal, and the light energy transducer converts the light signal into light of different frequencies. The light energy transducer can control the wavelength to an ultraviolet frequency of 325-355nm according to the requirements of the processing steps and processing accuracy.

[0057] The first clamp is provided on the side of the liquid storage tank 15 of the present application to fix the processed soft capsule shell in the molding platform 16 to prevent the phenomenon of uneven processing caused by movement during the acoustic action, so that the accuracy of the acoustic processing meets the manufacturing requirements. The present application can contain the photosensitive composite material in the liquid storage tank 15, and can also set a first feeding component on the side of the liquid storage tank 15 to transport the liquid photosensitive composite material to the molding path.

[0058] The photosensitive printer of the present application can perform photocuring of complex geometric bodies and 3D photocuring of the modeled drawings. The resulting capsule shell has high surface quality, low roughness, high precision, low manufacturing cost, and adjustable specific size.

[0059] like Figure 3 As shown, the sound wave generating device described in the present application includes a sound wave generating component 23, a second motion control component 21 and a sound head 22, the second motion control component 21 and the sound head 22 are electrically connected, the second motion control component 21 is used to control the sound head 22 to move along the outer side of the capsule shell; the sound wave generating component 23 is electrically connected to the sound head 22.

[0060] The sound wave generating component 23 includes a sound wave signal generator and a sound wave vibration generator. The sound wave signal generator generates an electrical signal, and the sound wave vibration generator converts the input electrical signal into mechanical vibration. The sound wave vibration generator can adjust the frequency within the range of 20-100khz according to the requirements of the processing procedure and processing accuracy. The tip of the sound wave vibration generator is equipped with a piezoelectric ceramic device, which transmits current to the piezoelectric ceramic through conduction to produce a piezoelectric effect and perform physical vibration of the pressure head. By adjusting the power and voltage at the input end, the vibration frequency of the pressure head can be maintained within the range of 30-50μm. The generation of sound wave vibration is determined by frequency and amplitude. The working pressure head of the sound wave vibration generator can be replaced according to specific processing requirements. The main difference is in size. The processing head is replaced according to different processing scenarios to meet production needs.

[0061] like Figure 3 As shown, the second motion control component 21 of the present application can control the acoustic head 22 to move in three dimensions to adjust the action position of the acoustic head 22. At the same time, the acoustic head 22 is connected to the acoustic vibration generator to allow the mechanical vibration bracket generated by the acoustic vibration generator to act on the capsule composite material.

[0062] The second motion control component 21 of the present application includes an X-axis guide rail 211, a Y-axis guide rail and a Z-axis mechanical arm 213, wherein the Y-axis guide rail is located in a Y-axis bracket 212, the Y-axis bracket 212 is movably located in the X-axis guide rail 211, and the Z-axis mechanical arm 213 is movably located in the Y-axis guide rail. The sound wave generating device also includes a second fixture 24, and the second fixture 24 fixes the sound head 22 in the Z-axis mechanical arm. The second fixture 24 can prevent the displacement between the sound head and the second motion control component caused by the generation of sound wave vibration, and avoid affecting the processing distance and causing processing errors.

[0063] In the present application, a second material supply assembly may be provided on the side of the acoustic head 22 to transport the liquid acoustically sensitive composite material to the molding path.

[0064] The device of this application combines the technologies of photoforming and acoustic additive manufacturing, composites the acoustic wave generator with the light curing device, and performs the illumination and sound waves separately in steps, giving full play to the advantages of high precision, high instantaneous power, and short action time of photocuring, and also taking advantage of the advantages of environmental protection, low power consumption, strong penetration, and large action range of acoustic additive manufacturing. While improving the accuracy of the capsule shell, it also simplifies the processing of the internal colloidal particles, realizing the dual manufacturing process of the shell and the interior of the molding material, making the process more controllable.

[0065] Example 3

[0066] like Figure 1 As shown, the present application provides a method for preparing a capsule composite material, comprising:

[0067] S1: Photocuring the photosensitive composite material to form a preliminary shell; a feed hole is reserved in the preliminary shell.

[0068] This application selects the THD-T1 ultrasonic generator according to the processing requirements and uses an AC220-50 / 60Hz power supply and adjusts the frequency to 25kHz. The current is selected to be the maximum value of 0.1A. At this time, the power is 600w. According to the processing accuracy requirements, sound waves with different gradient powers are used to install production economy and precision requirements. According to the processing requirements, the frequency can be adjusted within the range of 25-40kHz. When the precision requirements of the finished product are high, the frequency should be appropriately increased.

[0069] The forming platform of this application is controlled by the work motion planning program set by the CNC machine tool to control the movement of the robot arm in the X-axis direction of 100mm. The program can be manually modified according to specific processing requirements to ensure the continuity and action time of the acoustic processing.

[0070] The liquid photosensitive composite material is introduced into a preset path through the first feeding component and light-cured through the light source generator. The photosensitive composite material includes a photosensitive resin, a free radical prepolymer and a photosensitizer. The light source generator generates ultraviolet light (250-300nm wavelength) which immediately initiates a polymerization reaction in the photosensitive resin and completes the solidification conversion. The photosensitive resin is cured layer by layer through 3D printing as above, and a set preliminary shell is gradually formed. A feed hole is reserved in the preliminary shell.

[0071] S2: pouring the sound-sensitive composite material into the interior of the preliminary shell from the feed hole, and photocuring the photosensitive composite material at the feed hole to form a capsule shell with the sound-sensitive composite material poured inside.

[0072] Fill the reserved feeding hole with PDMS to cure the next internal material, and repeat the above light curing steps to seal.

[0073] S3: acoustically curing the acoustically sensitive composite material to form a capsule core.

[0074] The capsule shell is fixed on the forming platform, and the second motion control component drives the acoustic head to move to the starting point of the processing. The acoustic wave signal generator starts to run. During the acoustic curing process, the sound waves penetrate the soft capsule shell and act on the sound-sensitive composite material inside, realizing acoustic energy additive manufacturing and completing the curing of the capsule core.

[0075] Since sound waves are penetrating, the second motion control component can be arranged to move from one end of the capsule shell to the other end along the X-axis direction, so as to realize the solidification of the capsule core.

[0076] Alternatively, the second motion control component of the present application can also drive the acoustic head to circulate along the capsule shell for one cycle to achieve the solidification of the capsule core.

[0077] S4: After the acoustic head has completed the preset curing path, it can be decided whether to add repeated steps to change the physical and mechanical properties of the internal composite colloidal particles according to the actual situation; if necessary, the program will be automatically run once, the acoustic head will return to the starting point, and the ultrasonic curing process will be performed again.

[0078] The processed capsule composite material is taken out for subsequent cleaning to remove the residual liquid material on the surface, thereby completing the process of acoustic energy additive manufacturing and photocuring manufacturing of the capsule composite material.

[0079] This application combines photocuring with acoustic energy additive manufacturing. By adjusting the order of light and sound waves and the parameters used, the physical and chemical properties of the parts produced can be adjusted. Individual or multiple variables can be adjusted to adjust the light energy and illumination time of photocuring, change the hardness and porosity of the capsule shell, etc.

[0080] The present application integrates an acoustic wave generating device and a light source emitting device. By regulating the two devices, photoacoustic manufacturing can be realized. By regulating the acoustic wave and light parameters, the performance and morphology of the molded material can be greatly regulated. By comprehensively utilizing the advantages of high optical manufacturing precision and strong sound penetration ability, capsule composite materials with different qualities inside and outside can be processed and manufactured.

[0081] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims

1. A method for preparing a capsule composite material, characterized in that: include: The capsule shell is formed by photocuring the photosensitive composite material; The capsule core is formed by acoustically curing the acoustically sensitive composite material inside the capsule shell.

2. The method for preparing a capsule composite material according to claim 1, characterized in that: include: performing photocuring on the photosensitive composite material to form a preliminary shell; A feed hole is reserved in the preliminary shell; The sound-sensitive composite material is poured into the preliminary shell from the feeding hole, and the photosensitive composite material at the feeding hole is photocured to form a capsule shell with the sound-sensitive composite material poured inside; The acoustically sensitive composite material is acoustically cured to form the inner core of the capsule.

3. The method for preparing a capsule composite material according to claim 1, characterized in that: The photosensitive composite material comprises a photosensitive resin, a free radical prepolymer and a photosensitizer, wherein the mass fraction of the photosensitizer is 0.5-3wt%.

4. The method for preparing a capsule composite material according to claim 1, characterized in that: The acoustically sensitive composite material comprises a thermosetting resin, a toughening agent and a plasticizer.

5. The method for preparing a capsule composite material according to claim 1, characterized in that: The acoustic-sensitive composite material and the photosensitive composite material further include a particle additive, and the particle additive includes at least one of metal oxide powder, ceramic powder, composite material, and diamond powder.

6. The method for preparing a capsule composite material according to claim 1, characterized in that: The hardness of the capsule shell is between 78-85D. The hardness and thickness of the capsule shell increase with the increase of illumination capacity, increase with the decrease of molding time, and increase with the increase of illumination action time.

7. The method for preparing a capsule composite material according to claim 1, characterized in that: The hardness of the capsule core increases with increasing sonic power and increases with shortening curing time.

8. The method for preparing a capsule composite material according to claim 1, characterized in that: The inner surface of the capsule shell is a smooth surface.

9. A preparation device for a capsule composite material, characterized in that: It includes a sound wave generating device and a photosensitive printer; the photosensitive printer includes a liquid storage tank, a light source generator, and a first motion control component, the first motion control component and the light source generator are electrically connected, a first clamp is provided on the side of the liquid storage tank, the first clamp is used to clamp the capsule shell, and the first motion control component is used to control the movement of the light source generator to form the capsule shell.

10. The device for preparing a capsule composite material according to claim 9, characterized in that: The sound wave generating device includes a sound wave generating component, a second motion control component and a sound head, wherein the second motion control component is electrically connected to the sound head, and the second motion control component is used to control the sound head to move along the outer side of the capsule shell; the sound wave generating component is electrically connected to the sound head.

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