Double-nozzle continuous carbon fiber reinforced thermosetting composite 3D printer

Abstract

The utility model relates to a double-nozzle continuous carbon fiber reinforced thermoset composite 3D printer, which belongs to the technical field of 3D printing, and comprises a case, a printing platform and a double-nozzle printing device, the printing platform is arranged at the lower part in the case, a vertical movement driving device for driving the printing platform to move up and down is arranged in the case, and the double-nozzle printing device is arranged in the case. The double-nozzle printing device is arranged on the upper portion in the machine box, and a horizontal movement driving device used for driving the double-nozzle printing device to move front and back and left and right is arranged in the machine box. The double-nozzle printing device comprises a first nozzle, a second nozzle and a nozzle lifting driving mechanism, the first nozzle is used for extruding a continuous carbon fiber reinforced thermosetting composite material, the second nozzle is used for extruding a water-soluble consumable, and the nozzle lifting driving mechanism can drive the second nozzle to move up and down relative to the first nozzle. The 3D printer is small in size, high in printing precision and convenient to operate, and 3D printing of the continuous carbon fiber reinforced thermosetting composite material is achieved through exchange work of the two nozzles.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printers, in particular to a double-nozzle type continuous carbon fiber reinforced thermosetting composite material 3D printer. Background Art

[0002] Currently, the more mature 3D printing technology for composite materials is limited to short-cut fiber-reinforced thermoplastic composites, while thermoset composites offer superior mechanical properties. However, thermoset plastics are primarily used in photocuring in 3D printing and are rarely used as FDM printing filaments. Furthermore, the single-layer simultaneous curing used in photocuring is not suitable for carbon fiber placement. Therefore, few researchers, both domestic and international, have conducted research on 3D printing of continuous carbon fiber-reinforced thermoset composites.

[0003] Existing carbon fiber composite production methods are only suitable for mass-produced, large-scale products and are incapable of producing small batches of diverse, customized products. Furthermore, the consumables suitable for fused deposition modeling (FDM) 3D printing of continuous carbon fiber composites are almost exclusively thermoplastic. Furthermore, existing continuous carbon fiber composite 3D printers are bulky, require fixed installation within a factory, are difficult to use portable, and cannot meet the requirements for 3D printing of carbon fiber reinforced thermoset composites. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a dual-nozzle continuous carbon fiber reinforced thermosetting composite 3D printer to address the defects in the prior art.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a dual-nozzle continuous carbon fiber reinforced thermosetting composite material 3D printer, comprising a chassis, a printing platform and a dual-nozzle printing device, wherein the printing platform is arranged at the lower part of the chassis, and a vertical movement drive device for driving the printing platform to move up and down is provided in the chassis, and the dual-nozzle printing device is arranged at the upper part of the chassis, and a horizontal movement drive device for driving the dual-nozzle printing device to move forward, backward, left and right is provided in the chassis; the dual-nozzle printing device comprises a first nozzle, a second nozzle and a nozzle lifting drive mechanism, the first nozzle is used to extrude continuous carbon fiber reinforced thermosetting composite material, the second nozzle is used to extrude water-soluble consumables, and the nozzle lifting drive mechanism can drive the second nozzle to move up and down relative to the first nozzle.

[0006] Preferably, the chassis includes a frame and a bottom plate, and the bottom plate is fixed to the bottom of the frame.

[0007] Preferably, the vertical movement drive device includes two vertical stepping motors, two vertical transmission screws, two vertical transmission nuts, two platform height adjustment plates and a vertical moving bracket. The two vertical stepping motors are respectively fixed on the left and right sides of the chassis. The output end of the vertical stepping motor faces upward and is fixedly connected to the corresponding vertical transmission screw. The vertical transmission screw is equipped with a corresponding vertical transmission nut, and the vertical transmission nut is fixedly connected to the corresponding platform height adjustment plate. The two platform height adjustment plates are respectively fixedly connected to the left and right end portions of the vertical moving bracket, and the front and rear end portions of the vertical moving bracket are respectively fixedly connected to the bottom of the printing platform.

[0008] Preferably, the left and right ends of the front and rear sides of the vertical movable bracket are respectively fixedly connected with vertical sliders, and the chassis is fixed with vertical guide rails that match the vertical sliders.

[0009] Preferably, the horizontal movement drive device includes an X-axis movement drive mechanism, which includes an X-axis stepping motor, an X-axis driving pulley, an X-axis transmission belt, an X-axis driven pulley, an X-axis bearing seat, an X-axis belt pressure piece, an X-axis slider, an X-axis guide rail and an X-axis movable bracket. The X-axis stepping motor is fixed to one end of the X-axis movable bracket, and the output end of the X-axis stepping motor is fixedly connected to the X-axis driving pulley, and the X-axis driving pulley is transmission-connected to the X-axis driven pulley through the X-axis transmission belt, and the X-axis driven pulley is installed on the other end of the X-axis movable bracket through the X-axis bearing seat, and the X-axis transmission belt is fixedly connected to the X-axis slider through the X-axis belt pressure piece, the X-axis guide rail is fixed to the front side of the X-axis movable bracket, the X-axis slider slides with the X-axis guide rail, and the dual-nozzle printing device is installed on the front side of the X-axis slider.

[0010] Preferably, the horizontal movement drive device also includes a Y-direction movement drive mechanism, which includes a Y-direction stepper motor, a Y-direction driving pulley, a Y-direction transmission belt, a Y-direction driven pulley, a Y-direction synchronous shaft, two Y-direction driving synchronous pulleys, two Y-direction synchronous belts, two Y-direction driven synchronous pulleys, two Y-direction bearing seats, two Y-direction belt pressing plates, two Y-direction slides and two Y-direction guide rails. The Y-direction stepper motor is fixed on the chassis, and the output end of the Y-direction stepper motor is fixedly connected to the Y-direction driving pulley, and the Y-direction driving pulley is transmission-connected to the Y-direction driven pulley through the Y-direction transmission belt, and the Y-direction driven pulley is transmission-connected to the Y-direction driven pulley. The driven pulley fixed sleeve is arranged on the Y-direction synchronous shaft, and the left and right end portions of the Y-direction synchronous shaft are respectively fixedly sleeved with Y-direction active synchronous pulleys, and the Y-direction active synchronous pulley is transmission-connected with the corresponding Y-direction driven synchronous pulley through the corresponding Y-direction synchronous belt, and the Y-direction driven synchronous pulley is installed on the chassis through the corresponding Y-direction bearing seat, and the Y-direction synchronous belt is fixedly connected to the left and right end portions of the X-direction movable bracket through the corresponding Y-direction belt pressing piece, and the left and right end portions of the X-direction movable bracket are respectively fixedly connected to two Y-direction sliders, and the Y-direction slider is slidably matched with the corresponding Y-direction guide rail, and the Y-direction guide rail is fixed on the chassis.

[0011] Preferably, the dual-nozzle printing device also includes a support base, which is fixedly connected to the moving end of the horizontal moving drive device, and the first nozzle is installed on the support base. The nozzle lifting drive mechanism includes a nozzle lifting stepper motor, a nozzle transmission screw, a nozzle transmission nut, a nozzle height adjustment plate, a nozzle slider and a nozzle guide rail. The nozzle lifting stepper motor is fixed on the support base, and the output end of the nozzle lifting stepper motor faces downward and is fixedly connected to the nozzle transmission screw. A nozzle transmission nut is installed on the nozzle transmission screw, and the nozzle transmission nut is fixedly connected to the nozzle height adjustment plate. The nozzle height adjustment plate is fixedly connected to the nozzle slider, and the nozzle guide rail is fixed on the front side of the support base. The nozzle slider slides with the nozzle guide rail.

[0012] Preferably, the first nozzle and the second nozzle both include a heat dissipation block, a throat, a heating block and a nozzle, the upper end of the nozzle is inserted into the heating block through a thread, the lower end of the throat is inserted into the heating block through a thread and close to the nozzle, and the upper end of the throat is inserted into the heat dissipation block and fixed.

[0013] Preferably, the 3D printer further comprises a first extrusion servo motor and a second extrusion servo motor, wherein the first extrusion servo motor is used to push the carbon fiber consumable into the throat of the first nozzle, and the second extrusion servo motor is used to push the water-soluble consumable into the throat of the second nozzle.

[0014] Preferably, the dual-nozzle printing device also includes a shearing mechanism, which is installed on a support seat, and a wire block for threading consumables is fixed on the support seat. The shearing mechanism includes a shearing blade, a cam and a shearing stepper motor. The shearing blade is rotatably installed on the support seat, and the shearing stepper motor is fixed on the support seat. The output end of the shearing stepper motor is fixedly connected to the cam, and the cam can drive the shearing blade to swing and cut the consumables passing through the wire block.

[0015] Compared with the existing technology, the present invention has the following beneficial effects: the dual-nozzle continuous carbon fiber reinforced thermosetting composite material 3D printer is small in size, has high printing precision, is easy to operate, and has a wide range of replaceable nozzle inner diameters. It can be applicable to 3D printing of carbon fiber composite materials with different substrates, which is conducive to expanding the application of composite material 3D printing technology at the consumer desktop level. It can realize 3D printing of carbon fiber composite materials through the exchange of two nozzles, and can prevent carbon fiber thermosetting materials from collapsing during the curing process. It solves the problems of existing 3D printers that are large in size, need to be fixedly installed in the factory and are not easy to carry and use, and cannot meet the requirements of 3D printing of carbon fiber reinforced thermosetting composite materials. It has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on the drawings in the following description without any creative work.

[0017] Figure 1 This is a front perspective view of a dual-nozzle continuous carbon fiber reinforced thermosetting composite material 3D printer according to an embodiment of the present utility model.

[0018] Figure 2 This is a rear perspective view of a dual-nozzle continuous carbon fiber reinforced thermosetting composite material 3D printer according to an embodiment of the present utility model.

[0019] Figure 3 This is a structural schematic diagram of a vertical movement drive device in a dual-nozzle continuous carbon fiber reinforced thermosetting composite material 3D printer according to an embodiment of the present utility model.

[0020] Figure 4 This is a schematic structural diagram of a horizontal moving drive device in a dual-nozzle continuous carbon fiber reinforced thermosetting composite material 3D printer according to an embodiment of the present utility model.

[0021] Figure 5This is a structural schematic diagram of a dual-nozzle printing device in a dual-nozzle continuous carbon fiber reinforced thermosetting composite material 3D printer according to an embodiment of the present utility model.

[0022] Figure 6 This is a schematic structural diagram of the first nozzle and the second nozzle in a dual-nozzle continuous carbon fiber reinforced thermosetting composite material 3D printer according to an embodiment of the present utility model.

[0023] Markings in the figure:

[0024] 1. Chassis, 11. Rack, 12. Bottom plate;

[0025] 2. Printing platform;

[0026] 3. Dual-nozzle printing device, 31. First nozzle, 32. Second nozzle, 33. Nozzle lifting drive mechanism, 34. Support base, 331. Nozzle lifting stepper motor, 332. Nozzle drive screw, 333. Nozzle drive nut, 334. Nozzle height adjustment plate, 335. Nozzle slider, 336. Nozzle guide rail, 341. Heat sink, 343. Throat, 343. Heating block, 344. Nozzle, 35. First extrusion servo motor, 36. Second extrusion servo motor, 37. Shearing mechanism, 371. Shearing blade, 372. Cam, 373. Shearing stepper motor, 38. Wire drawing block;

[0027] 4. Vertical movement drive device, 41. Vertical stepping motor, 42. Vertical transmission screw, 43. Vertical transmission nut, 44. Platform height adjustment plate, 45. Vertical movement bracket, 46. Vertical slider, 47. Vertical guide rail;

[0028] 5. Horizontal movement drive device, 51. X-axis movement drive mechanism, 511. X-axis stepping motor, 512. X-axis driving pulley, 513. X-axis transmission belt, 514. X-axis driven pulley, 515. X-axis bearing seat, 516. X-axis belt pressure piece, 517. X-axis slider, 518. X-axis guide rail, 519. X-axis moving bracket, 52. Y-axis movement drive mechanism, 521. Y-axis stepping motor, 522. Y-axis driving pulley, 523. Y-axis transmission belt, 524. Y-axis driven pulley, 525. Y-axis synchronous shaft, 526. Y-axis driving synchronous pulley, 527. Y-axis synchronous belt, 528. Y-axis driven synchronous pulley, 529. Y-axis bearing seat, 530. Y-axis belt pressure piece, 531. Y-axis slider, 532. Y-axis guide rail. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In order to make the above-mentioned features and advantages of the present invention more obvious and easy to understand, the following embodiments are specifically cited and explained in detail with reference to the drawings.

[0030] like Figures 1 to 6 As shown, an embodiment of the present utility model provides a dual-nozzle continuous carbon fiber reinforced thermosetting composite material 3D printer, including a chassis 1, a printing platform 2 and a dual-nozzle printing device 3, wherein the printing platform 2 is arranged at the lower part of the chassis 1, and a vertical movement drive device 4 for driving the printing platform 2 to move up and down is provided in the chassis 1, and the dual-nozzle printing device 3 is arranged at the upper part of the chassis 1, and a horizontal movement drive device 5 for driving the dual-nozzle printing device 3 to move forward, backward, left and right is provided in the chassis 1; the dual-nozzle printing device 3 includes a first nozzle 31, a second nozzle 32 and a nozzle lifting drive mechanism 33, the first nozzle 31 is used to extrude continuous carbon fiber reinforced thermosetting composite material, the second nozzle 32 is used to extrude water-soluble consumables, and the nozzle lifting drive mechanism 33 can drive the second nozzle 32 to move up and down relative to the first nozzle 31.

[0031] In this embodiment, the chassis 1 includes a frame 11 and a base plate 12. The base plate 12 can be fixed to the bottom of the frame 11 by screws. The frame 11 can be made of European standard 2020 aluminum alloy. Covering plates can also be fixed to the left, right, and top sides of the frame 11. The rear side of the frame 11 can be provided with an opening or a movable door for convenient access to the consumable material tray. The overall dimensions of the dual-nozzle continuous carbon fiber reinforced thermoset composite 3D printer of this embodiment can be: 400 mm long, 300 mm wide, and 350 mm high. The positioning accuracy of the two nozzles can be: 0.1 mm in the X-axis, 0.1 mm in the Y-axis, and 0.05 mm in the vertical (Z-axis). The inner diameter of the two nozzles can be interchangeable from 0.46 mm to 4 mm, which is a wide range and suitable for 3D printing of carbon fiber composite materials on different substrates.

[0032] In this embodiment, the vertical movement drive device 4 includes two vertical stepping motors 41, two vertical transmission screws 42, two vertical transmission nuts 43, two platform height adjustment plates 44 and a vertical movement bracket 45. The two vertical stepping motors 41 are respectively fixed on the left and right sides of the chassis 1. The output end of the vertical stepping motor 41 faces upward and is fixedly connected to the corresponding vertical transmission screw 42. The vertical transmission screw 42 is equipped with a corresponding vertical transmission nut 43. The vertical transmission nut 43 is fixedly connected to the corresponding platform height adjustment plate 44. The two platform height adjustment plates 44 are respectively fixedly connected to the left and right ends of the vertical movement bracket 45. The front and rear ends of the vertical movement bracket 45 are respectively fixedly connected to the bottom of the printing platform 2. The operating principle of the vertical motion drive device 4 in this embodiment is as follows: the two vertical stepper motors 41 rotate in the same direction and at the same rate. The rotational motion of the vertical stepper motors 41 is converted into vertical linear motion of the platform height adjustment plate 44 through the threaded engagement between the vertical drive screw 42 and the vertical drive nut 43. To ensure smoother up and down movement, vertical sliders 46 are fixedly connected to the left and right ends of the front and rear sides of the vertical motion bracket 45, and the chassis 1 is fixed with vertical guide rails 47 that cooperate with the vertical sliders 46. The overall planar dimensions of the printing platform 2 can be 256mm long by 256mm wide, and the flatness of the upper surface of the printing platform 2 can be 0.05mm. Before use, the levelness of the printing platform 2 relative to the ground can be adjusted by adjusting the height of the two platform height adjustment plates 44, with an accuracy of 0.05mm.

[0033] In this embodiment, the horizontal movement drive device 5 includes an X-direction movement drive mechanism 51, and the X-direction movement drive mechanism 51 includes an X-direction stepping motor 511, an X-direction driving pulley 512, an X-direction transmission belt 513, an X-direction driven pulley 514, an X-direction bearing seat 515, an X-direction belt pressing piece 516, an X-direction slider 517, an X-direction guide rail 518 and an X-direction moving bracket 519. The X-direction stepping motor 511 is fixed to one end of the X-direction moving bracket 519, and the output end of the X-direction stepping motor 511 is fixedly connected to the X-direction driving pulley 512, and the X-direction driving pulley 512 is connected to the X-direction driven belt through the X-direction transmission belt 513. The X-direction driven pulley 514 is connected for transmission, and the X-direction driven pulley 514 is installed on the other end of the X-direction movable bracket 519 through the X-direction bearing seat 515. The X-direction transmission belt 513 is fixedly connected to the X-direction slider 517 through the X-direction belt pressure piece 516. Specifically, the X-direction belt pressure piece 516 is fixed to the X-direction slider 517 by screws, and the X-direction transmission belt 513 is tightly pressed between the X-direction belt pressure piece 516 and the X-direction slider 517. The X-direction guide rail 518 is fixed on the front side of the X-direction movable bracket 519, and the X-direction slider 517 slides with the X-direction guide rail 518. The dual-nozzle printing device 3 is installed on the front side of the X-direction slider 517. The working principle of the X-direction moving drive mechanism 51 in this embodiment is as follows: the pulley transmission mechanism composed of the X-direction active pulley 512, the X-direction transmission belt 513 and the X-direction driven pulley 514 converts the rotational motion of the X-direction stepping motor 511 into the X-direction belt pressure plate 516, which drives the X-direction slider 517 to move linearly left and right along the X-direction guide rail 518, and the X-direction slider 517 drives the dual-nozzle printing device 3 to move linearly in the horizontal X direction.

[0034] In this embodiment, the horizontal movement drive device 5 also includes a Y-direction movement drive mechanism 52, which includes a Y-direction stepping motor 521, a Y-direction driving pulley 522, a Y-direction transmission belt 523, a Y-direction driven pulley 524, a Y-direction synchronous shaft 525, two Y-direction driving synchronous pulleys 526, two Y-direction synchronous belts 527, two Y-direction driven synchronous pulleys 528, two Y-direction bearing seats 529, two Y-direction belt pressing plates 530, two Y-direction sliders 531 and two Y-direction guide rails 532. The Y-direction stepping motor 521 is fixed to the chassis 1, and the output end of the Y-direction stepping motor 521 is fixedly connected to the Y-direction driving pulley 522, and the Y-direction driving pulley 522 is transmission-connected to the Y-direction driven pulley 524 via the Y-direction transmission belt 523. The Y-direction driven pulley 524 is fixedly sleeved on the Y-direction synchronous shaft 525, and the left and right end portions of the Y-direction synchronous shaft 525 are respectively fixedly sleeved with Y-direction active synchronous pulleys 526, and the Y-direction active synchronous pulley 526 is transmission-connected to the corresponding Y-direction driven synchronous pulley 528 through the corresponding Y-direction synchronous belt 527, and the Y-direction driven synchronous pulley 528 is installed on the chassis 1 through the corresponding Y-direction bearing seat 529, and the Y-direction synchronous belt 527 is fixedly connected to the left and right end portions of the X-direction movable bracket 519 through the corresponding Y-direction belt pressing piece 530, and the left and right end portions of the X-direction movable bracket 519 are respectively fixedly connected to two Y-direction sliders 531, and the Y-direction slider 531 is slidably matched with the corresponding Y-direction guide rail 532, and the Y-direction guide rail 532 is fixed on the chassis 1. The working principle of the Y-direction mobile drive mechanism 52 in this embodiment is as follows: the rotational motion of the Y-direction stepping motor 521 is converted into the rotational motion of the Y-direction synchronous shaft 525 through the pulley transmission mechanism composed of the Y-direction active pulley 522, the Y-direction transmission belt 523 and the Y-direction driven pulley 524, and the rotational motion of the Y-direction synchronous shaft 525 is converted into the Y-direction belt pressing plate 530 by the pulley transmission mechanism composed of the Y-direction active synchronous pulley 526, the Y-direction synchronous belt 527 and the Y-direction driven synchronous pulley 528, which drives the X-direction movable bracket 519 and the two Y-direction sliders 531 to move linearly back and forth along the Y guide rail 532, thereby driving the dual-nozzle printing device 3 to move linearly in the horizontal Y direction.

[0035] In this embodiment, the dual-nozzle printing device 3 also includes a support base 34, which is fixedly connected to the moving end of the horizontal movement drive device 5. The first nozzle 31 is installed on the support base 34, and the nozzle lifting drive mechanism 33 includes a nozzle lifting stepper motor 331, a nozzle transmission screw 332, a nozzle transmission nut 333, a nozzle height adjustment plate 334, a nozzle slider 335 and a nozzle guide rail 336. The nozzle lifting stepper motor 331 is fixed on the support base 34, and the output end of the nozzle lifting stepper motor 331 faces downward and is fixedly connected to the nozzle transmission screw 332. A nozzle transmission nut 333 is installed on the nozzle transmission screw 332, and the nozzle transmission nut 333 is fixedly connected to the nozzle height adjustment plate 334. The nozzle height adjustment plate 334 is fixedly connected to the nozzle slider 335. The nozzle guide rail 336 is fixed on the front side of the support base 34, and the nozzle slider 335 slides with the nozzle guide rail 336. In the initial state of this embodiment, the bottom surface of the first nozzle 31 and the bottom surface of the second nozzle 32 may not be in the same horizontal plane; when the second nozzle 32 needs to work, the rotational motion of the nozzle lifting stepper motor 331 is converted into the nozzle height adjustment plate 334 through the threaded engagement transmission between the nozzle transmission screw 332 and the nozzle transmission nut 333, which drives the second nozzle 32 to move linearly downward, so that the bottom surface of the second nozzle 32 is flush with the bottom surface of the first nozzle 31.

[0036] In this embodiment, each of the first and second nozzles 31 and 32 includes a heat sink 341, a throat 342, a heating block 343, and a nozzle 344. The upper end of the nozzle 344 is threadedly inserted into the heating block 343. The lower end of the throat 342 is threadedly inserted into the heating block 343 and closely abuts the nozzle 344. The upper end of the throat 342 is inserted into the heat sink 341 and can be secured by a set screw. The 3D printer also includes a first extrusion servo motor 35 and a second extrusion servo motor 36. The first extrusion servo motor 35 is used to push the carbon fiber filament into the throat 342 of the first nozzle 31, and the second extrusion servo motor 36 is used to push the water-soluble filament into the throat 342 of the second nozzle 32. The heating block 343 transfers heat generated by the electric heating element to the throat 342, melting the filament into a liquid state. The liquid flows through the throat 342 to the nozzle 344, thereby extruding the filament (continuous carbon fiber reinforced thermoset composite material or water-soluble filament).

[0037] In this embodiment, the dual-nozzle printing device 3 also includes a shearing mechanism 37, which is mounted on a support base 34. A wire block 38 for threading consumables is fixed on the support base 34. The shearing mechanism 37 includes a shearing blade 371, a cam 372, and a shearing stepper motor 373. The shearing blade 371 is rotatably mounted on the support base 34. The shearing stepper motor 373 is fixed to the support base 34. The output end of the shearing stepper motor 373 is fixedly connected to the cam 372. The cam 372 can drive the shearing blade 371 to swing and shear the consumables passing through the wire block 38. When it is necessary to switch to printing with water-soluble consumables, the shearing stepper motor 373 drives the cam 372 to rotate, and the cam 372 drives the shearing blade 371 to swing to cut the continuous carbon fiber reinforced thermosetting composite material, making it easier to switch to water-soluble consumables.

[0038] The working principle of the dual-nozzle continuous carbon fiber reinforced thermosetting composite material 3D printer of this embodiment is as follows: continuous carbon fiber reinforced thermosetting composite material is filled into the first nozzle 31, and PVA water-soluble consumable is filled into the second nozzle 32; when the current printing layer is the continuous carbon fiber reinforced thermosetting composite material, the second extrusion servo motor 36 is controlled to be stationary, and the first extrusion servo motor 35 is controlled to extrude the continuous carbon fiber reinforced thermosetting composite material in the first nozzle 31 from its nozzle 344 into a first cylindrical filament, the horizontal movement drive device 5 is controlled to move the dual-nozzle printing device 3 on the horizontal plane so as to deposit the extruded first cylindrical filament on the printing platform 2, and after completing the deposition of this layer, the vertical movement drive device 4 is controlled to lower the printing platform 2 by one layer height to deposit the next layer; the current printing When the printing layer is PVA water-soluble consumables, the nozzle lifting drive mechanism 33 is controlled to move the second nozzle 32 downward until its bottom surface is parallel to the bottom surface of the first nozzle 31, the first extrusion servo motor 35 is controlled to be stationary, and the second extrusion servo motor 36 is controlled to extrude the PVA water-soluble consumables in the second nozzle 32 from its nozzle 344 into a second cylindrical filament, and the horizontal movement drive device 5 is controlled to move the dual-nozzle printing device 3 on the horizontal plane so as to deposit the extruded second cylindrical filament on the printing platform 2. After completing the deposition of this layer, the vertical movement drive device 4 is controlled to lower the printing platform 2 by one layer height to deposit the next layer; through layer-by-layer deposition, a three-dimensional solid part is finally accumulated, and the shell covering part is removed by a water-soluble method to realize 3D printing of continuous carbon fiber reinforced thermosetting composite materials.

[0039] Dual-nozzle 3D printing of continuous carbon fiber-reinforced thermoset composites is an additive manufacturing technology, a highly promising advanced manufacturing technique. Its greatest advantage lies in its ability to rapidly form parts while retaining the robust properties of carbon fiber composites. This allows for the production of small-batch, customized, and diverse products. Continuous carbon fiber-reinforced thermoset composites are manufactured by heating E-20 epoxy resin to a fluid liquid state, evenly mixing in a solid dicyandiamide curing agent, and then uniformly wrapping the liquid resin matrix around the continuous carbon fiber filaments before curing to form composite 3D printing consumables.

[0040] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0042] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A dual-nozzle continuous carbon fiber reinforced thermosetting composite material 3D printer, characterized in that: The machine comprises a chassis, a printing platform and a dual-nozzle printing device, wherein the printing platform is arranged in the lower part of the chassis, a vertical movement drive device for driving the printing platform to move up and down is arranged in the chassis, and the dual-nozzle printing device is arranged in the upper part of the chassis, and a horizontal movement drive device for driving the dual-nozzle printing device to move forward, backward, left and right is arranged in the chassis; The dual-nozzle printing device includes a first nozzle, a second nozzle and a nozzle lifting drive mechanism. The first nozzle is used to extrude continuous carbon fiber reinforced thermosetting composite material, and the second nozzle is used to extrude water-soluble consumables. The nozzle lifting drive mechanism can drive the second nozzle to move up and down relative to the first nozzle.

2. A dual-nozzle continuous carbon fiber reinforced thermosetting composite material 3D printer according to claim 1, characterized in that: The chassis includes a frame and a bottom plate, and the bottom plate is fixed to the bottom of the frame.

3. A dual-nozzle continuous carbon fiber reinforced thermosetting composite material 3D printer according to claim 1, characterized in that: The vertical movement drive device includes two vertical stepping motors, two vertical transmission screws, two vertical transmission nuts, two platform height adjustment plates and a vertical movement bracket. The two vertical stepping motors are respectively fixed on the left and right sides of the chassis. The output end of the vertical stepping motor faces upward and is fixedly connected to the corresponding vertical transmission screw. The vertical transmission screw is equipped with a corresponding vertical transmission nut, and the vertical transmission nut is fixedly connected to the corresponding platform height adjustment plate. The two platform height adjustment plates are respectively fixedly connected to the left and right end portions of the vertical movement bracket. The front and rear end portions of the vertical movement bracket are respectively fixedly connected to the bottom of the printing platform.

4. A dual-nozzle continuous carbon fiber reinforced thermosetting composite material 3D printer according to claim 3, characterized in that: The left and right ends of the front and rear sides of the vertical movable bracket are respectively fixedly connected with vertical sliders, and the chassis is fixed with vertical guide rails that match the vertical sliders.

5. The dual-nozzle continuous carbon fiber reinforced thermosetting composite material 3D printer according to claim 1, characterized in that: The horizontal movement drive device includes an X-axis movement drive mechanism, which includes an X-axis stepping motor, an X-axis driving pulley, an X-axis transmission belt, an X-axis driven pulley, an X-axis bearing seat, an X-axis belt pressing piece, an X-axis slider, an X-axis guide rail and an X-axis movable bracket. The X-axis stepping motor is fixed to one end of the X-axis movable bracket, and the output end of the X-axis stepping motor is fixedly connected to the X-axis driving pulley, and the X-axis driving pulley is transmission-connected to the X-axis driven pulley through the X-axis transmission belt. The X-axis driven pulley is installed on the other end of the X-axis movable bracket through the X-axis bearing seat, and the X-axis transmission belt is fixedly connected to the X-axis slider through the X-axis belt pressing piece. The X-axis guide rail is fixed to the front side of the X-axis movable bracket, and the X-axis slider slides in cooperation with the X-axis guide rail. The dual-nozzle printing device is installed on the front side of the X-axis slider.

6. A dual-nozzle continuous carbon fiber reinforced thermosetting composite material 3D printer according to claim 5, characterized in that: The horizontal movement drive device also includes a Y-direction movement drive mechanism, and the Y-direction movement drive mechanism includes a Y-direction stepping motor, a Y-direction driving pulley, a Y-direction transmission belt, a Y-direction driven pulley, a Y-direction synchronous shaft, two Y-direction driving synchronous pulleys, two Y-direction synchronous belts, two Y-direction driven synchronous pulleys, two Y-direction bearing seats, two Y-direction belt pressing sheets, two Y-direction slides and two Y-direction guide rails. The Y-direction stepping motor is fixed on the chassis, and the output end of the Y-direction stepping motor is fixedly connected to the Y-direction driving pulley, and the Y-direction driving pulley is connected to the Y-direction driven pulley through the Y-direction transmission belt. The wheel fixing sleeve is arranged on the Y-direction synchronous shaft, and the left and right end portions of the Y-direction synchronous shaft are respectively fixedly sleeved with a Y-direction active synchronous pulley, and the Y-direction active synchronous pulley is transmission-connected to the corresponding Y-direction driven synchronous pulley through the corresponding Y-direction synchronous belt, and the Y-direction driven synchronous pulley is installed on the chassis through the corresponding Y-direction bearing seat, and the Y-direction synchronous belt is fixedly connected to the left and right end portions of the X-direction movable bracket through the corresponding Y-direction belt pressing piece, and the left and right end portions of the X-direction movable bracket are respectively fixedly connected to two Y-direction sliders, and the Y-direction slider is slidably matched with the corresponding Y-direction guide rail, and the Y-direction guide rail is fixed to the chassis.

7. The dual-nozzle continuous carbon fiber reinforced thermosetting composite material 3D printer according to claim 1, characterized in that: The dual-nozzle printing device also includes a support base, which is fixedly connected to the moving end of the horizontal movement drive device. The first nozzle is installed on the support base, and the nozzle lifting drive mechanism includes a nozzle lifting stepper motor, a nozzle transmission screw, a nozzle transmission nut, a nozzle height adjustment plate, a nozzle slider and a nozzle guide rail. The nozzle lifting stepper motor is fixed on the support base, and the output end of the nozzle lifting stepper motor faces downward and is fixedly connected to the nozzle transmission screw. A nozzle transmission nut is installed on the nozzle transmission screw, and the nozzle transmission nut is fixedly connected to the nozzle height adjustment plate. The nozzle height adjustment plate is fixedly connected to the nozzle slider, and the nozzle guide rail is fixed to the front side of the support base. The nozzle slider slides with the nozzle guide rail.

8. The dual-nozzle continuous carbon fiber reinforced thermosetting composite material 3D printer according to claim 7, characterized in that: The first nozzle and the second nozzle both include a heat dissipation block, a throat, a heating block and a nozzle. The upper end of the nozzle is inserted into the heating block through a thread, the lower end of the throat is inserted into the heating block through a thread and is close to the nozzle, and the upper end of the throat is inserted into the heat dissipation block and fixed.

9. The dual-nozzle continuous carbon fiber reinforced thermosetting composite material 3D printer according to claim 8, characterized in that: The 3D printer further includes a first extrusion servo motor and a second extrusion servo motor, wherein the first extrusion servo motor is used to push the carbon fiber consumable material into the throat of the first nozzle, and the second extrusion servo motor is used to push the water-soluble consumable material into the throat of the second nozzle.

10. The dual-nozzle continuous carbon fiber reinforced thermosetting composite material 3D printer according to claim 7, characterized in that: The dual-nozzle printing device also includes a shearing mechanism, which is installed on a support base. A wire block for threading consumables is fixed on the support base. The shearing mechanism includes a shearing blade, a cam and a shearing stepper motor. The shearing blade is rotatably installed on the support base. The shearing stepper motor is fixed on the support base. The output end of the shearing stepper motor is fixedly connected to the cam. The cam can drive the shearing blade to swing and cut the consumables passing through the wire block.

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