Composite 3D printing device and printing method thereof

Abstract

The application discloses a kind of composite 3D printing device and its printing method, wherein, including printing platform, translation component, extrusion printing head, transfer platform, rotating component, lifting component and light machine, first printing groove and second printing groove are provided side by side on printing platform, and the bottom surface of first printing groove and the bottom surface of second printing groove are both light-transmitting plane;Translation component is connected with printing platform;Extrusion printing head and transfer platform are both arranged above printing platform, and rotating component and lifting component are both connected with transfer platform;Light machine is arranged below printing platform, and is oppositely arranged with transfer platform.The application carries out two printing modes of ink direct writing and digital light processing independently on printing platform respectively, combines two printing modes, improves the precision of printing, has great significance to 3D printing flexible electronic and soft robot, and is convenient to realize the integrated manufacturing of function-sensing of robot and device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of 3D printing, in particular to a composite 3D printing device and a printing method thereof. BACKGROUND

[0002] The existing 3D printing technologies include two kinds of direct ink writing (DIW) 3D printing technology and digital light processing (DLP) 3D printing technology. The DIW is a printing technology that stores ink (such as resin, conductive glue, elastomer, hydrogel, etc.) in the printing head, and extrudes the ink through the nozzle to the printing plane, and deposits a specific pattern on the printing plane as the nozzle moves. The DLP is a printing technology that uses the characteristics of liquid photosensitive polymer curing under laser irradiation, immerses the printing plane in the resin liquid, and directly cures the formed model by projecting a specific pattern through the light machine. This printing method is fast, high-precision, and can print complex structures.

[0003] With the continuous improvement of 3D printing technology, multi-material printing has become an important research direction. Using DIW alone for multi-material printing requires using multiple printing heads for printing, and can only print layer by layer along the printing path, which is time-consuming. Using DLP alone for multi-material printing requires using multiple resin tanks, which consumes a large amount of material, and the residual resin on the printing plane during the printing process moves in different types of resin tanks, causing pollution problems and making it difficult to recycle resin materials. In view of the poor effect of using DIW or DLP alone for multi-material printing, the existing technology has a method of combining the advantages of DIW and DLP for multi-material printing, for example, a paper titled "Integrating Digital Light Processing with Direct Ink Writing for Hybrid 3D Printing of Functional Structures and Devices" published in Addictive Manufacturing describes a method of combining a DLP printing system that projects ultraviolet light from top to bottom with a DIW printing system for multi-material printing. It is not difficult to imagine that combining the two printing methods can be applied to printing soft robots, printing the flexible substrate of the robot through the DLP printer, and then printing the conductive circuit through the DIW at the specified layer, which can realize the integrated printing of the integrated robot.

[0004] However, the existing DIW and DLP each has certain limitations. The DIW printing system can print on demand along the printing path, and there is no pollution problem, but the thickness of the printed model is usually limited by the nozzle diameter, and the deposition process is limited by the nozzle moving path, and the molding speed is slow; after the DLP printing system prints the model, the printing plane and the model surface will be left with resin, which is easy to cause pollution problems.

[0005] Therefore, the existing method of combining the two printing methods has low overall precision of the printed model, and there are pollution problems, which is not conducive to the integrated printing of the driving and sensing integrated robot, and the existing technology needs to be improved and developed. SUMMARY

[0006] In view of the deficiencies of the prior art described above, the purpose of the present application is to provide a composite 3D printing device and a printing method thereof, aiming to solve the problems of insufficient precision, pollution and inability to complete the integrated printing of the driving and sensing integrated robot in the existing 3D printing technology combining DIW and DLP.

[0007] The technical scheme of the present application is as follows:

[0008] A composite 3D printing device, comprising a printing platform, a translation component, an extrusion printing head, a transfer platform, a rotating component, a lifting component and a light machine, the first printing groove and the second printing groove are arranged side by side on the printing platform, and the bottom surface of the first printing groove and the bottom surface of the second printing groove are both light-transmitting planes; the translation component is connected with the printing platform for driving the horizontal movement of the printing platform; the extrusion printing head is arranged above the printing platform for direct ink writing printing in the first printing groove; the transfer platform is arranged above the printing platform; the rotating component is connected with the transfer platform for driving the rotation of the transfer platform; the lifting component is connected with the transfer platform; the light machine is arranged below the printing platform, and the light machine is arranged opposite to the transfer platform.

[0009] The composite 3D printing device, wherein the extrusion printing head comprises a shell, an extrusion structure arranged in the shell, and a discharge nozzle arranged on the shell, the shell is hollow for storing resin; the extrusion structure is used for extruding the resin from the discharge nozzle.

[0010] The composite 3D printing device, wherein the composite 3D printing device comprises an XYZ axis control structure, the XYZ axis control structure is connected with the extrusion printing head for controlling the movement of the extrusion printing head along the printing path.

[0011] The composite 3D printing device, wherein the extrusion printing head is provided with a plurality of extrusion printing heads; the second printing groove is provided with a plurality of second printing grooves.

[0012] The application also discloses a composite 3D printing method for the composite 3D printing device.

[0013] S100, a multi-material model is designed by using a three-dimensional modeling software, the multi-material model is divided into a plurality of layers, and each entity to which each material in each layer belongs is saved separately;

[0014] S200, corresponding extrusion printing heads are selected according to materials and processing needs, corresponding resin materials are poured into a second printing tank, a printing path of the extrusion printing heads is planned, a printing picture of the light machine is generated, and the printing path and the printing picture of the same layer are integrated;

[0015] S300, direct ink writing printing is performed in the first printing tank by the extrusion printing heads based on the printing path and the printing picture; and digital light processing printing is performed on the transfer platform by the light machine irradiating the second printing tank;

[0016] S400, the step S200 and the step S300 are repeatedly executed until the multi-material model is printed layer by layer.

[0017] The composite 3D printing method, wherein the step S300 specifically comprises:

[0018] S310, the extrusion printing head is moved into the first printing tank;

[0019] S320, direct ink writing printing is performed in the first printing tank along the printing path by the extrusion printing head, and a sensing circuit layer is obtained;

[0020] S330, the extrusion printing head is moved out of the first printing tank, the printing platform is moved by a translation component, the first printing tank is moved to between the transfer platform and the light machine, the transfer platform is lowered to contact the sensing circuit layer by a lifting component, and the sensing circuit layer is transferred to the transfer platform by the light machine;

[0021] S340, the printing platform is moved out of the first printing tank by the lifting component, the printing platform is moved by the translation component, and the second printing tank is moved to between the transfer platform and the light machine;

[0022] S350, the transfer platform is lowered below a resin liquid surface by the lifting component, and a flexible substrate layer is obtained by digital light processing printing of the light machine;

[0023] S360, the transfer platform is centrifugally rotated by a rotating component to remove residual resin on the transfer platform and the model.

[0024] The composite 3D printing method, wherein the step S360 specifically comprises:

[0025] S361, the lifting component drives the transfer platform to ascend until the resin in the second printing tank is separated;

[0026] S362, the rotating component is started to drive the transfer platform to rotate, remove the residual resin on the transfer platform and the model, and return to the position before rotation.

[0027] The composite 3D printing method, wherein the step S361 specifically comprises: the lifting component drives the transfer platform to ascend to a position higher than the resin liquid level in the second printing tank and lower than the opening of the second printing tank.

[0028] The application further discloses a computer device comprising a memory and a processor, and the memory stores a computer program, wherein the processor executes the computer program to realize the steps of the composite 3D printing method.

[0029] The application further discloses a computer readable storage medium, which stores a computer program, wherein the computer program is executed by a processor to realize the steps of the composite 3D printing method.

[0030] Compared with the prior art, the application has the following advantages:

[0031] The composite 3D printing device disclosed by the application sets the translation component to drive the printing platform to move in the horizontal direction, and the printing platform can be switched back and forth between the extrusion printing head and the light machine during the printing process to alternately perform direct ink writing printing and digital light processing printing.

[0032] Specifically, the first part of printing is performed in the first printing tank of the printing platform, the extrusion printing head sprays the material downward to the bottom surface of the first printing tank for printing, and the printing precision is high. After completing the first part of printing, the first printing tank can be moved to the light machine and the transfer platform, and the printed part of the model is fixed to the transfer platform through curing by the light machine. Then, the second printing tank is moved to the light machine and the transfer platform, resin liquid is injected into the second printing tank, and digital light processing printing is performed by the light machine to obtain the second part of the model. In particular, the second printing tank with light transmission at the bottom is used for digital light processing printing, and the light machine sprays laser from bottom to top for curing, which reduces the influence of the surface tension of the resin liquid on the model, so as to control the layer thickness of the digital light processing printing and improve the precision of the digital light processing printing. After printing is completed, the transfer platform is raised above the resin liquid surface by the cooperation of the lifting component and the rotating component, and the resin remaining on the transfer platform and the model can be removed by centrifugal rotation, thereby avoiding pollution.

[0033] In general, the composite 3D printing device disclosed in the application can be applied to print soft robots, and can alternately print flexible substrates and sensing circuits with high precision and without pollution, which is beneficial to integrated printing of driving and sensing integrated robots. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0035] Figure 1 It is a structural schematic diagram of the composite 3D printing device in the present application.

[0036] Figure 2 It is a flowchart of the composite 3D printing method in the present application.

[0037] Figure 3 It is a flowchart of step S300 of the composite 3D printing method in the present application.

[0038] Figures 4 to 12 It is a printing flowchart of the composite 3D printing device in the present application.

[0039] Among them, 10, printing platform; 11, first printing tank; 12, second printing tank; 20, extrusion printing head; 21, shell; 22, extrusion structure; 23, discharge nozzle; 30, transfer platform; 40, light machine; 51, sensing circuit layer; 52, flexible substrate layer. DETAILED DESCRIPTION

[0040] In order to better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort shall fall within the scope of the present application.

[0041] Referring to Figure 1 In an embodiment of the present application, a composite 3D printing device is disclosed, comprising a printing platform 10, a translation component, an extrusion printing head 20, a transfer platform 30, a rotating component, a lifting component and a light machine 40. The first printing slot 11 and the second printing slot 12 are arranged side by side on the printing platform 10, and the bottom surface of the first printing slot 11 and the bottom surface of the second printing slot 12 are both light-transmitting planes. The translation component is connected with the printing platform 10 for driving the horizontal movement of the printing platform 10. The extrusion printing head 20 is arranged above the printing platform 10 for direct ink writing printing in the first printing slot 11. The transfer platform 30 is arranged above the printing platform 10. The rotating component is connected with the transfer platform 30 for driving the rotation of the transfer platform 30. The lifting component is connected with the transfer platform 30. The light machine 40 is arranged below the printing platform 10, and the light machine 40 is arranged opposite to the transfer platform 30.

[0042] The translation component (not shown in the drawings) of the composite 3D printing device disclosed in the embodiment can be an assembly structure of a motor and a transmission gear set, or an assembly structure of a motor and a sliding guide rail, or an assembly structure of a mechanical hand grabbing, for fixing the printing platform 10 and driving the horizontal movement of the printing platform 10 on a fixed height horizontal plane.

[0043] It should be noted that the structure and collocation type of the translation component in the embodiment is only an example, but the protection scope of the present application is not limited thereto. Other types of translation components that can achieve the technical effects disclosed in the present application shall also be within the protection scope of the present application as equivalent replacements of the present application.

[0044] Specifically, the printing platform 10 is driven to move in the horizontal direction by the translation component, and the printing platform 10 can be switched back and forth between the extrusion printing head 20 and the light machine 40 during the printing process, so as to alternately perform direct ink writing printing and digital light processing printing.

[0045] Specifically, the first part of printing is performed in the first printing tank 11 of the printing platform 10, the extrusion printing head 20 sprays the material downward to the bottom surface of the first printing tank 11 to perform printing, and the printing precision is high. After the first part of printing is completed, the first printing tank 11 can be moved to between the light machine 40 and the transfer platform 30. Since the bottom surface of the first printing tank 11 is a light-transmitting plane, the laser emitted by the light machine 40 can pass through the first printing tank 11 and irradiate the surface of the transfer platform 30, and the printed part of the model is fixed to the transfer platform 30 through curing by the light machine 40. Then, the second printing tank 12 is moved to between the light machine 40 and the transfer platform 30, the second printing tank 12 is filled with resin liquid, and the bottom surface of the second printing tank 12 is also light-transmitting, so that the laser emitted by the light machine 40 can pass through. The second part of the model is obtained by performing digital light processing printing by the light machine 40.

[0046] In particular, the method of emitting laser from bottom to top by the light machine 40 is adopted when performing digital light processing printing, the influence of the surface tension of the resin liquid on the model is reduced, the layer thickness of the digital light processing printing is beneficial to control, and the precision of the digital light processing printing is improved.

[0047] After printing is completed, the transfer platform 30 is lifted above the resin liquid surface through cooperation of a lifting component (not shown in the figure) and a rotating component (not shown in the figure), and the resin remaining on the transfer platform 30 and the model can be removed in a rotating centrifugal manner to avoid pollution. It should be noted that the lifting component disclosed in the embodiment includes but is not limited to structures such as telescopic rods, telescopic supports and hydraulic pumps; and the rotating component disclosed in the embodiment includes but is not limited to combined structures of rotating motors and transmission gears, combined structures of rotating motors and transmission rods, combined structures of electromagnetic drives and the like.

[0048] In general, the composite 3D printing device disclosed in the embodiment can alternately perform printing of a flexible substrate and printing of a sensing circuit with high precision and without pollution when the device is applied to print a soft robot, and is beneficial to integrated printing of a driving-sensing integrated robot.

[0049] It should be noted that the light machine 40 in the embodiment includes but is not limited to an ultraviolet light machine 40. The pattern to be printed can be projected on the printing plane of the transfer platform 30 by the ultraviolet light machine 40, and the resin liquid in a specific area of the printing platform 10 can be cured. However, the protection scope of the present application is not limited to this, and other types of light machines 40 that can achieve the technical effects disclosed in the present application as equivalent replacements of the present application should also be within the protection scope of the present application.

[0050] As Figure 1As shown in this embodiment, the extrusion printhead 20 includes a housing 21, an extrusion structure 22 disposed within the housing 21, and a discharge nozzle 23 disposed on the housing 21. The housing 21 is hollow and used to store resin; the extrusion structure 22 is used to extrude the resin from the discharge nozzle 23. By storing the resin directly within the housing 21, and each extrusion printhead 20 being used to extrude one type of resin material, printing can be performed on demand during multi-material molding, saving material. Multiple materials can be printed simply by increasing the number of extrusion printheads 20. In actual operation, when the first printing groove 11 moves below the extrusion printhead 20, the extrusion printhead 20 moves downward, and resin is extruded from the discharge nozzle 23 onto the bottom surface of the first printing groove 11 for direct ink writing.

[0051] Specifically, as another embodiment of this invention, the extrusion printhead 20 includes an XYZ axis control structure (not shown in the figures), which controls the movement of the discharge nozzle 23 along the printing path. Specifically, the XYZ axis control structure includes, but is not limited to, a combination of a robotic arm, a sliding guide rail, and transmission gears. By setting the XYZ axis control structure to regulate the movement of the extrusion printhead 20 in three-dimensional space, the movement of the extrusion printhead 20 along a preset printing path can be accurately controlled, improving the accuracy of direct ink writing printing. Furthermore, the composite 3D printing device disclosed in this embodiment can be equipped with multiple extrusion printheads 20. The XYZ axis control structure facilitates the orderly and accurate control of the movement of multiple extrusion printheads 20, allowing for segmented, multiple printing operations, which is beneficial for forming complex models.

[0052] Specifically, as another implementation of this embodiment, multiple extrusion printheads 20 are disclosed. In this embodiment, multiple extrusion printheads 20 are provided to store and print various materials, increasing the adaptability of the composite 3D printing device to multi-material printing scenarios. In this embodiment, multiple second printing slots 12 can also be provided. By providing multiple second printing slots 12, digital light processing printing of various materials can be performed, further improving the adaptability of the composite 3D printing device to multi-material printing scenarios.

[0053] like Figure 2 As shown, as another embodiment of this application, a composite 3D printing method is disclosed for use in any of the composite 3D printing apparatuses described above; wherein, the method includes the following steps:

[0054] S100. Design a multi-material model using 3D modeling software, divide the multi-material model into several layers, and save the entity to which each material belongs in each layer separately.

[0055] S200, selecting a corresponding extrusion printing head 20 according to the material and processing needs, selecting a corresponding resin material to pour into the second printing tank 12, planning a printing path of the extrusion printing head 20, generating a printing picture of the light machine 40, and integrating the printing path and the printing picture of the same layer;

[0056] S300, based on the printing path and the printing picture, directly ink writing printing is performed in the first printing tank 11 by the extrusion printing head 20; digital light processing printing is performed on the transfer platform 30 by irradiating the second printing tank 12 by the light machine 40;

[0057] S400, repeating the above steps S200 and S300 until the multi-material model is printed layer by layer.

[0058] The composite 3D printing method disclosed in the embodiment has simple operation and fast processing speed. By pre-modeling, using CAD software or other model processing software to divide, the multi-material model is divided into layers, and then direct ink writing printing and digital light processing printing are completed layer by layer. The precision is high during single layer printing, and there is no residual resin liquid on the model, avoiding pollution problems, and the printing of the next layer can be avoided, improving the precision of the entire printing process. In addition, when different layers use different resin liquids for digital light processing printing, there is no pollution, improving the recycling rate of the resin liquid.

[0059] In general, when printing a soft robot by using the composite 3D printing method disclosed in the embodiment, the flexible substrate and the sensing circuit of the robot can be printed synchronously, saving printing time and improving printing precision, and perfectly combining the advantages of direct ink writing printing and digital light processing printing.

[0060] As shown in Figure 3 , as an embodiment of the embodiment, the step S300 specifically includes:

[0061] S310, moving the extrusion printing head 20 into the first printing tank 11;

[0062] S320, as shown in Figure 4 , directly ink writing printing is performed in the first printing tank 11 along the printing path by the extrusion printing head 20, and a sensing circuit layer 51 is obtained;

[0063] S330, as shown in Figure 5As shown, the extrusion printhead 20 is removed from the first print slot 11, and the print platform 10 is moved by the translation component to move the first print slot 11 between the transfer platform 30 and the optical engine 40. The transfer platform 30 is driven to descend to contact the sensing circuit layer 51 by the lifting component. The sensing circuit layer 51 is transferred onto the transfer platform 30 by the optical engine 40.

[0064] S340, such as Figure 6 As shown, the printing platform 10 is moved out of the first printing slot 11 by the lifting component, and the printing platform 10 is moved by the translation component to move the second printing slot 12 between the transfer platform 30 and the optical engine 40;

[0065] S350, such as Figure 7 As shown, the transfer platform 30 is driven to descend below the resin liquid surface by the lifting component, and digital light processing printing is performed by the optomechanical 40 to obtain the flexible substrate layer 52;

[0066] S360, such as Figure 8 As shown, the transfer platform 30 is centrifugally rotated by a rotating component to remove residual resin from the transfer platform 30 and the model.

[0067] In the printing method disclosed in this embodiment, after each layer of the preset model is printed in the second printing tank 12, centrifugal rotation is performed to remove residual resin from the transfer platform 30 and the model, making the model surface clean and facilitating the printing process of the next layer. This also prevents contamination of the resin solution in the next layer. Furthermore, the resin removed by centrifugal rotation flows back into the second printing tank 12, facilitating recycling and saving material costs.

[0068] like Figure 8 As shown, in another implementation of this embodiment, direct ink writing printing and digital light processing printing can be performed simultaneously. After the transfer platform 30 transfers the previous layer of the sensing circuit layer 51 from the first printing slot 11, the printing of the next layer of the sensing circuit layer 51 can be performed immediately. Figure 9 As shown, after the digital light processing printing of the previous layer is completed, the printing platform 10 can be moved immediately to align the first printing slot 11 back with the transfer platform 30, and the sensor circuit layer 51 of the next layer can be transferred through the transfer platform 30; then as... Figure 10 , Figure 11 and Figure 12 As shown, the next layer of digital light processing printing is then performed. It is evident that alternating this process can accelerate printing speed and improve printing efficiency until a complete multi-material model is printed.

[0069] Specifically, as another implementation form of the embodiment, it is disclosed that the step S360 specifically includes:

[0070] S361, the lifting component drives the transfer platform 30 to rise until the transfer platform 30 is separated from the resin in the second printing tank 12;

[0071] S362, the rotating component is started to drive the transfer platform 30 to rotate, remove the residual resin on the transfer platform 30 and the model, and return to the position before rotation.

[0072] The rotating component drives the transfer platform 30 to return to the position before rotation disclosed in the embodiment is to facilitate the printing of the next layer structure of the model. When each layer printing starts, it is from the same angle of the model to start printing, which is convenient for the three-dimensional modeling software to plan the printing path of the extrusion printing head 20 and the printing picture projected by the light machine 40, reduces the calculation amount of the three-dimensional modeling software, avoids the error of path planning, and is beneficial to improve the printing accuracy.

[0073] Specifically, as another implementation form of the embodiment, it is disclosed that the step S361 specifically includes: the lifting component drives the transfer platform 30 to rise to a position higher than the liquid level of the resin in the second printing tank 12 and lower than the opening of the second printing tank 12. The transfer platform 30 rotates in the second printing tank 12 disclosed in the embodiment, and the centrifugal thrown resin can be collected into the second printing tank 12, which is convenient for recycling and reuse, and also avoids the pollution caused by throwing the resin into the surrounding environment.

[0074] As another embodiment of the present application, a computer device is disclosed, which comprises a memory and a processor, and the memory stores a computer program, wherein the processor implements the steps of the composite 3D printing method according to any one of the above embodiments when executing the computer program.

[0075] As another embodiment of the present application, a computer readable storage medium is disclosed, which stores a computer program, wherein the computer program is executed by a processor to implement the steps of the composite 3D printing method according to any one of the above embodiments.

[0076] In summary, the application discloses a composite 3D printing device, which comprises a printing platform 10, a translation component, an extrusion printing head 20, a transfer platform 30, a rotating component, a lifting component and a light machine 40, the first printing groove 11 and the second printing groove 12 are arranged side by side on the printing platform 10, and the bottom surfaces of the first printing groove 11 and the second printing groove 12 are both light-transmitting planes; the translation component is connected with the printing platform 10 and used for driving the printing platform 10 to move horizontally; the extrusion printing head 20 is arranged above the printing platform 10 and used for direct ink writing printing in the first printing groove 11; the transfer platform 30 is arranged above the printing platform 10; the rotating component is connected with the transfer platform 30 and used for driving the transfer platform 30 to rotate; the lifting component is connected with the transfer platform 30; and the light machine 40 is arranged below the printing platform 10 and opposite to the transfer platform 30. The composite 3D printing device disclosed by the application drives the printing platform 10 to move in the horizontal direction through the translation component, and the printing platform 10 can be switched back and forth between the extrusion printing head 20 and the light machine 40 during the printing process, so as to alternately perform direct ink writing printing and digital light processing printing. The second printing groove 12 with a light-transmitting bottom is used for digital light processing printing, the light machine 40 emits laser light from bottom to top to perform solidification, the influence of the surface tension of the resin liquid surface on the model is reduced, the layer thickness of the digital light processing printing is facilitated to be controlled, and the precision of the digital light processing printing is improved. After the printing is completed, the transfer platform 30 is lifted above the resin liquid surface through the cooperation of the lifting component and the rotating component, the resin remaining on the transfer platform 30 and the model can be removed through the rotating centrifugal method, and the pollution problem is avoided. In general, the composite 3D printing device disclosed by the application can alternately perform flexible substrate printing and sensing circuit printing with high precision and without pollution when the composite 3D printing device is applied to print a soft robot, and is beneficial to integrated printing of a driving and sensing integrated robot.

[0077] It should be noted that the embodiments and features in the embodiments in the application can be combined with each other without conflict.

[0078] It should be noted that the application takes the composite 3D printing device as an example to introduce the specific structure and working principle of the application, but the application of the application is not limited to the composite 3D printing device, and can also be applied to the production and use of other similar workpieces.

[0079] It should be understood that the application is not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof, and the scope of the application is only limited by the appended claims.

[0080] The above merely describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A composite 3D printing device, characterized in that, include: A printing platform, wherein a first printing slot and a second printing slot are arranged side by side on the printing platform, and the bottom surfaces of the first printing slot and the second printing slot are both light-transmitting planes; A translation component, connected to the printing platform, is used to drive the printing platform to move horizontally; An extrusion printhead is positioned above the printing platform and is used for direct ink writing and printing within the first printing groove; The transfer platform is located above the printing platform; A rotating component, connected to the transfer platform, is used to drive the transfer platform to rotate; A lifting component is connected to the transfer platform; An optical engine is located below the printing platform, and the optical engine is positioned opposite the transfer platform.

2. The composite 3D printing device according to claim 1, characterized in that, The extrusion printhead includes a housing, an extrusion structure disposed within the housing, and a discharge nozzle disposed on the housing. The housing is hollow and used to store resin. The extrusion structure is used to extrude the resin from the discharge nozzle.

3. The composite 3D printing apparatus according to claim 2, characterized in that, The composite 3D printing device includes an XYZ axis control structure, which is connected to the extrusion print head and is used to control the movement of the extrusion print head along the printing path.

4. The composite 3D printing apparatus according to any one of claims 1 to 3, characterized in that, The extrusion printhead has multiple parts; the second print slot has multiple parts.

5. A composite 3D printing method, used in the composite 3D printing apparatus as described in any one of claims 1 to 4; characterized in that, Includes the following steps: S100. Design a multi-material model using 3D modeling software, divide the multi-material model into several layers, and save the entity to which each material belongs in each layer separately. S200. Select the corresponding extrusion printhead according to the material and processing requirements, pour the corresponding resin material into the second printing groove, plan the printing path of the extrusion printhead, generate the printing image of the optical engine, and integrate the printing path and the printing image of the same layer. S300: Based on the printing path and the printing image, direct ink writing and printing are performed in the first printing groove through the extrusion print head; The second printing tank is illuminated by an optical engine, and digital light processing printing is performed on the transfer platform. S400. Repeat steps S200 and S300 until the multi-material model is printed layer by layer.

6. The composite 3D printing method according to claim 5, characterized in that, Step S300 specifically includes: S310, Move the extrusion printhead into the first print slot; S320. Direct ink writing and printing are performed in the first printing groove through the extrusion print head along the printing path to obtain the sensing circuit layer; S330. Remove the extrusion printhead from the first print slot, and move the print platform by means of the translation component to move the first print slot between the transfer platform and the optomechanical system. Drive the transfer platform down to contact the sensing circuit layer by means of the lifting component. Transfer the sensing circuit layer to the transfer platform by means of optomechanical projection. S340. The printing platform is moved out of the first printing slot by the lifting component, and the printing platform is moved by the translation component to move the second printing slot between the transfer platform and the optical engine; S350. The transfer platform is driven to descend below the resin liquid level by the lifting component, and digital light processing printing is performed by the optomechanical system to obtain a flexible substrate layer. S360. The transfer platform is centrifugally rotated by the rotating component to remove residual resin from the transfer platform and the model.

7. The composite 3D printing method according to claim 6, characterized in that, Step S360 specifically includes: S361. The lifting component drives the transfer platform to rise until it detaches from the resin in the second printing tank; S362. Start the rotating component to drive the transfer platform to rotate, remove the residual resin on the transfer platform and the model, and return to the position before rotation.

8. The composite 3D printing method according to claim 7, characterized in that, Step S361 specifically includes: the lifting component driving the transfer platform to rise to a position higher than the resin liquid level in the second printing tank and lower than the opening of the second printing tank.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the composite 3D printing method according to any one of claims 5 to 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is processed and executed, it implements the steps of the composite 3D printing method according to any one of claims 5 to 8.

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