Multi-material 3D printer based on directional arrangement of magnetic control fibers

Abstract

The utility model provides a multi-material 3D printer based on magnetic control fiber directional arrangement. The multi-material 3D printer comprises a base, a digital light projector, a supporting frame, a connecting rod pushing mechanism, a first moving mechanism, a material replacing table, a resin groove, a printing table, an ultrasonic generator, a second moving mechanism and a printing platform. A digital light projector is installed at the upper end of the base, the fixed end of a connecting rod pushing mechanism, the fixed end of a first moving mechanism and a printing table are fixedly installed at the upper end of the base, the moving end of the connecting rod pushing mechanism is used for moving a resin groove, and a groove opening of the resin groove faces upwards and is placed at the upper end of the material replacing table. And the ultrasonic generator and the printing platform are mounted at the upper end of the printing table. The local performance regulation and control of the internal structure of the material in the manufacturing process are realized; and through the design of the connecting rod pushing mechanism and the material replacing table, material switching in the manufacturing process and regulation and control of the mass fraction of particles in the composite material are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of 3D printing technology, specifically relating to a multi-material 3D printer based on the directional arrangement of magnetron fibers. Background Technology

[0002] In the long process of natural evolution, organisms have evolved many superior properties that are difficult for artificial materials to match in order to adapt to the ever-changing natural environment, such as lightweight and high strength, toughness, and adaptability. Unlike artificial materials that rely on the inherent properties of their components, biomaterials achieve performance regulation through the intricate design of their internal microstructures. However, traditional manufacturing techniques such as machining, casting, and forging—"subtractive" manufacturing methods—are mainly limited to shaping the external form of materials. The microstructure of the processed object is already determined during the material manufacturing stage, making it difficult to readjust the internal structure through cutting or burning, and thus unable to achieve precise control over the internal structure of the material. In contrast, 3D printing technology, with its layer-by-layer accumulation molding characteristic, can achieve localized control over composition and microstructure in multiple dimensions and directions, giving it a unique advantage in manufacturing heterogeneous materials.

[0003] By using external fields such as electric fields, flow fields, and magnetic fields, the solid-phase reinforcing phases (such as fibers or nanoparticles) in composite materials can be driven to achieve directional arrangement, thereby achieving the purpose of local performance regulation. Among them, electric field-driven arrangement has high requirements for the conductivity of particles, while the arrangement induced by flow field shear force in inkjet printing is limited in efficiency due to its serial process characteristics. In contrast, magnetic field-assisted arrangement is a highly efficient method for particle orientation. In the 3D printing system, DLP (Digital Light Processing) photopolymerization technology can complete the forming of a part's cross-sectional contour with each image projection, which has the advantages of fast forming speed, high forming efficiency, and high forming accuracy. Its printing raw materials are liquid materials such as composite photosensitive resins, and the magnetic field-assisted non-contact orientation arrangement method is highly compatible with this technology. However, to generate magnetic fields in different directions within the printing area, integrate the magnetic field generator into the 3D printer without interfering with its operation, and dynamically adjust the particle mass fraction during the printing process, innovative designs are still needed on the basis of traditional photopolymerization 3D printers to meet complex control requirements. Utility Model Content

[0004] The purpose of this invention is to provide a multi-material 3D printer based on the directional arrangement of magnetron fibers, which combines field-assisted assembly technology with 3D printing process to achieve precise local layering control of the microstructure of materials, thereby significantly improving the comprehensive performance of composite materials and providing a new molding equipment solution for the preparation of high-performance biomimetic composite materials.

[0005] To overcome the shortcomings of the prior art, this utility model application proposes a multi-material 3D printer based on magnetron-controlled fiber orientation arrangement, comprising a base, a digital light projector, a support frame, a linkage feeding mechanism, a first moving mechanism, a material changing table, a resin tank, a printing table, an ultrasonic generator, a second moving mechanism, and a printing platform. The digital light projector is mounted on the upper end of the base. The fixed end of the linkage feeding mechanism, the fixed end of the first moving mechanism, and the printing table are fixedly mounted on the upper end of the base. The moving end of the linkage feeding mechanism is used to move the resin tank. The moving end of the first moving mechanism is fixedly connected to the material changing table. The resin tank is placed with its opening facing upwards on the upper end of the material changing table. The ultrasonic generator and the printing platform are mounted on the upper end of the printing table.

[0006] Preferably, a square groove is fixedly installed at the upper end of the base, and the digital light projector is installed inside the square groove.

[0007] Preferably, a support table is installed on the upper end of the base, a support frame is installed on the upper end of the support table, and the support frame is fixedly connected to the fixed end of the rod pushing mechanism.

[0008] Preferably, the fixed end of the first moving mechanism is installed at the upper end of the support table.

[0009] Preferably, a cleaning tank is installed at the top of the printing table, and an ultrasonic generator is installed at the bottom of the cleaning tank.

[0010] Preferably, the fixed end of the second moving mechanism is installed on the upper part of the printing table; the moving end of the second moving mechanism is fixedly connected to the fixed end of the third moving mechanism, and the moving end of the third moving mechanism is fixedly connected to the printing platform.

[0011] Preferably, the printer further includes: an electromagnetic solenoid, wherein there are a total of three electromagnetic solenoids, one of which is installed at the bottom of the printing table, and the other two electromagnetic solenoids are installed on the printing table. The three electromagnetic solenoids are perpendicular to each other in space, and the axes of the three electromagnetic solenoids pass through the center line of the resin tank.

[0012] Compared with the closest existing technology, the beneficial effects of this utility model application are as follows:

[0013] 1) Under the premise of maintaining the normal operation of the photopolymer 3D printer, three mutually perpendicular electromagnetic solenoids were placed around the resin tank. By combining them, magnetic fields in different directions were generated to orient the fibers, thereby realizing the local performance regulation of the internal structure of the material during the manufacturing process.

[0014] 2) The design of the linkage pusher mechanism and material changing table enables material switching during the manufacturing process;

[0015] 3) An ultrasonic cleaning tank was added to the side of the resin tank, which solved the problem of cross-contamination between different materials during material switching in the manufacturing process. Attached Figure Description

[0016] Figure 1 This invention illustrates a multi-material 3D printer based on magnetron-controlled fiber orientation arrangement. Figure 1 ;

[0017] Figure 2 This invention illustrates a multi-material 3D printer based on magnetron-controlled fiber orientation arrangement. Figure 2 ;

[0018] Figure 3 This diagram shows the structural schematic of the linkage feeding mechanism of the multi-material 3D printer based on the magnetically controlled fiber orientation arrangement of the present invention.

[0019] Figure 4 This diagram shows a cross-sectional view of the moving mechanism of the multi-material 3D printer based on the directional arrangement of magnetron fibers of this invention.

[0020] Figure 5 The diagram shows a top view of the moving mechanism of the multi-material 3D printer based on the magnetically controlled fiber orientation arrangement of this invention.

[0021] Figure 6 The installation position of the electromagnetic solenoid of the multi-material 3D printer based on the directional arrangement of magnetron fibers of this invention is shown. Detailed Implementation

[0022] The specific embodiments of this utility model application will be further described in detail below with reference to the accompanying drawings.

[0023] Example:

[0024] like Figure 1-6 As shown, this utility model application proposes a multi-material 3D printer based on magnetron sputtering fiber orientation arrangement, comprising a base 1, a digital light projector 21, a support frame 31, a linkage feeding mechanism 32, a first moving mechanism 33, a material changing table 34, a resin tank 35, a printing table 40, an ultrasonic generator 42, a second moving mechanism 43, and a printing platform 45. The digital light projector 21 is mounted on the upper end of the base 1. The fixed end of the linkage feeding mechanism 32, the fixed end of the first moving mechanism 33, and the printing table 40 are fixedly mounted on the upper end of the base 1. The moving end of the linkage feeding mechanism 32 is used to move the resin tank 35. The moving end of the first moving mechanism 33 is fixedly connected to the material changing table 34. The resin tank 35 is placed with its opening facing upwards on the upper end of the material changing table 34. The ultrasonic generator 42 and the printing platform 45 are mounted on the upper end of the printing table 40.

[0025] Furthermore, a square groove 20 is fixedly installed on the upper end of the base 1, and the digital light projector 21 is installed inside the square groove 20. The transmitted light wavelength of the digital light projector 21 is 405nm, the exposure uniformity is above 85%, the accuracy is 50μm, the distortion is <0.8%, and the maximum projection area is 131.2mm×82mm.

[0026] Furthermore, a support table 30 is installed on the upper end of the base 1, and a support frame 31 is installed on the upper end of the support table 30. The support frame 31 is fixedly connected to the fixed end of the rod pushing mechanism 32.

[0027] Furthermore, the fixed end of the first moving mechanism 33 is installed on the upper end of the support table 30.

[0028] Furthermore, a cleaning tank 41 is installed on the upper end of the printing table 40, and an ultrasonic generator 42 is installed at the bottom of the cleaning tank 41.

[0029] Furthermore, the fixed end of the second moving mechanism 43 is installed on the upper end of the printing table 40; the moving end of the second moving mechanism 43 is fixedly connected to the fixed end of the third moving mechanism 44, and the moving end of the third moving mechanism 44 is fixedly connected to the printing platform 45, which enables the printing platform 45 to move in space.

[0030] Furthermore, the printer also includes three electromagnetic solenoids 46: one installed at the bottom of the printing table 40, and the other two installed on top of the printing table 40. The three electromagnetic solenoids 46 are perpendicular to each other in space, and their axes pass through the center line of the resin tank 35. When energized, each electromagnetic solenoid 46 generates a magnetic field along its axis. The three perpendicular electromagnetic solenoids 46 in space can generate magnetic fields of arbitrary magnitude and direction through their mutual cooperation, achieving the directional arrangement of fibers.

[0031] In one embodiment, the connecting rod pushing mechanism 32 includes a pushing fixing plate 320, a motor 321, a plum blossom-shaped clamping coupling 322, connecting rod a 323, connecting rod b 324, push rod 325, and electromagnet 326. The motor 321 is fixed to the side of the pushing fixing plate 320, which serves as the fixed end of the connecting rod pushing mechanism 32. The plum blossom-shaped clamping coupling 322 connects connecting rod a 323 to the motor 321. Connecting rod a 323, connecting rod b 324, and push rod 325 are connected by hinges at their ends. Push rod 325 slides in a groove on the pushing fixing plate 320. Electromagnet 326 is fixed to push rod 325 with screws and serves as the moving end of the connecting rod pushing mechanism 32. The resin tank 35 is made of a material that the electromagnet 326 can attract, facilitating the movement of the resin tank 35 by the electromagnet 326.

[0032] In one embodiment of this disclosure, the first moving mechanism 33, the second moving mechanism 43, and the third moving mechanism 44 have the same structure, including a motor 330, a plum blossom-shaped clamping coupling 331, two bearing seats 332, a lead screw nut seat 333, a lead screw nut 334, a ball screw 335, a guide rail slider 336, a guide rail base 337, and a guide rail 338. The motor 330, bearing seats 332, and guide rail 338 are fixed to the guide rail base 337 by bolts. The guide rail slider 336 is slidably mounted on the guide rail 338. The ball screw 335 is rotatably connected to the bearing seat 332 through bearings. The lead screw nut 334 is bolted to the lead screw nut seat 333. The lead screw nut 334 is spirally sleeved on the ball screw 335. The lead screw nut seat 333 is fixed to the guide rail slider 336 by bolts. The motor 330 is connected to the ball screw 335 through the plum blossom-shaped clamping coupling 331.

[0033] The working principle of a multi-material 3D printer based on magnetic fiber orientation arrangement is as follows: (1) The three-dimensional model to be printed is sliced ​​to generate a two-dimensional image; (2) The printing platform 45 is moved to the printing position by the second moving mechanism 43 and the third moving mechanism 44, and the materials required for printing are poured into the resin tank 35 respectively. For ease of explanation, the materials required for printing are now referred to as material 1, material 2 and material 3 respectively; (3) The connecting rod pushing mechanism 32 pushes the resin tank 35 containing material 1 to the printing position, and the electromagnetic solenoid 46 generates a magnetic field to orient the fibers. The third moving mechanism 44 controls the printing platform 45 to move to the printing distance and expose the image; (4) stop the exposure, the second moving mechanism 43 and the third moving mechanism 44 move the printing platform 45 to the cleaning tank 41, and the ultrasonic generator 42 works to clean the excess material from the print head of the printing platform 45; (5) the first moving mechanism 33 moves the material changing table 34, and the connecting rod pushing mechanism 32 takes the resin tank 35 containing material 1 back to the material changing table 34; (6) the connecting rod pushing mechanism 32 pushes the resin tank 35 containing material 2 to the printing position, and the electromagnetic solenoid 4 6. A magnetic field is generated to orient the fibers. The second moving mechanism 43 and the third moving mechanism 44 move the printing platform 45 to the printing distance and expose the image. (7) Exposure is stopped. The second moving mechanism 43 and the third moving mechanism 44 move the printing platform 45 to the cleaning tank 41. The ultrasonic generator 42 works to clean the excess material. (8) The first moving mechanism 33 moves the material changing table 34. The connecting rod pushing mechanism 32 takes the resin tank 35 containing material 2 back to the material changing table 34. (9) The connecting rod pushing mechanism 32 pushes the resin tank 35 containing material 3 to the printing position. (10) The electromagnetic solenoid 46 generates a magnetic field to orient the fibers, and the second moving mechanism 43 and the third moving mechanism 44 move the printing platform 45 to the printing distance to expose the image; (11) The exposure is stopped, and the second moving mechanism 43 and the third moving mechanism 44 move the printing platform 45 to the cleaning tank 41, and the ultrasonic generator 42 works to clean the excess material; (12) The first moving mechanism 33 moves the material changing table 34, and the connecting rod pushing mechanism 32 takes the resin tank 35 containing the material 3 back to the material changing table 34, and repeats steps 3 to 11 until the part is printed.

[0034] The aforementioned multi-material 3D printer based on magnetron fiber orientation arrangement has three mutually perpendicular electromagnetic solenoids 46 placed around the resin tank 35 without affecting the normal operation of the printer. The electromagnetic solenoids 46 generate magnetic fields in different directions to orient the fibers through mutual combination, realizing the local performance control of the internal structure of the material during the manufacturing process. The design of adding a connecting rod pusher mechanism 32 and a material changing table 34 realizes the switching of materials and the control of the particle mass fraction in the composite material during the manufacturing process. An ultrasonic cleaning tank 41 is added next to the printing area to solve the problem of cross-contamination between different materials during material switching during the manufacturing process.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model application and not to limit its protection scope. Although the utility model application has been described in detail with reference to the above embodiments, those skilled in the art should understand that after reading this utility model application, they can still make various changes, modifications or equivalent substitutions to the specific implementation of the application. However, these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims.

Claims

1. A multi-material 3D printer based on magnetron fiber orientation arrangement, characterized in that, The system includes a base (1), a digital light projector (21), a support frame (31), a linkage pushing mechanism (32), a first moving mechanism (33), a material changing table (34), a resin tank (35), a printing table (40), an ultrasonic generator (42), a second moving mechanism (43), and a printing platform (45). The digital light projector (21) is installed on the upper end of the base (1). The fixed end of the linkage pushing mechanism (32), the fixed end of the first moving mechanism (33), and the printing table (40) are fixedly installed on the upper end of the base (1). The moving end of the linkage pushing mechanism (32) is used to move the resin tank (35). The moving end of the first moving mechanism (33) is fixedly connected to the material changing table (34). The resin tank (35) is placed on the upper end of the material changing table (34) with its opening facing upward. The ultrasonic generator (42) and the printing platform (45) are installed on the upper end of the printing table (40).

2. The printer according to claim 1, characterized in that, A square groove (20) is fixedly installed on the upper end of the base (1), and the digital light projector (21) is installed inside the square groove (20).

3. The printer according to claim 1, characterized in that, A support table (30) is installed on the upper end of the base (1), and a support frame (31) is installed on the upper end of the support table (30). The support frame (31) is fixedly connected to the fixed end of the rod pushing mechanism (32).

4. The printer according to claim 3, characterized in that, The fixed end of the first moving mechanism (33) is installed at the upper end of the support table (30).

5. The printer according to claim 1, characterized in that, A cleaning tank (41) is installed at the upper end of the printing table (40), and an ultrasonic generator (42) is installed at the bottom of the cleaning tank (41).

6. The printer according to claim 1, characterized in that, The upper end of the printing table (40) is equipped with the fixed end of the second moving mechanism (43); the moving end of the second moving mechanism (43) is fixedly connected to the fixed end of the third moving mechanism (44), and the moving end of the third moving mechanism (44) is fixedly connected to the printing platform (45).

7. The printer according to any one of claims 1-6, characterized in that, Also includes: There are three electromagnetic solenoids (46), one of which is installed at the bottom of the printing table (40), and the other two electromagnetic solenoids (46) are installed on the printing table (40). The three electromagnetic solenoids (46) are perpendicular to each other in space, and the axes of the three electromagnetic solenoids (46) pass through the center line of the resin tank (35).

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