An automatic feeding 3D printing device

Abstract

This utility model relates to the field of 3D printing technology, and more particularly to an automatic feeding 3D printing device. The utility model includes a base, a pump, a mixing tank, support legs, a processor, and a funnel. The pump is fixed to one end of the top of the base, and four support legs are fixed to the other end of the top of the base. The mixing tank is fixed to one side of the four support legs, close to each other. The processor is fixed to one side of the top of the mixing tank, and the funnel is fixed to the other side of the top of the mixing tank. A rotating structure is provided inside the mixing tank, and a speed-regulating structure is provided at the bottom of the mixing tank. This utility model provides an automatic feeding 3D printing device. Through the design of the rotating and speed-regulating structures, the angle and speed of the mixing blades can be flexibly adjusted according to the material characteristics. For example, for mixing high-viscosity metal powder and binder, the tilt angle of the mixing blades is increased to enhance the stirring force, and high-speed rotation breaks up agglomerates.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, and in particular to an automatic feeding 3D printing device. Background Technology

[0002] Currently, 3D printing technology, with its advantages of rapid prototyping and customization, is widely used in many fields such as aerospace, medicine, and construction. Common 3D printing equipment builds three-dimensional objects by layer-by-layer material deposition, using materials including plastics, metals, ceramics, and resins. To ensure the continuity of the printing process, some 3D printing equipment is equipped with a feeding system that automatically replenishes material during printing, reducing manual intervention. For example, some extrusion-based 3D printers use a spiral feeding mechanism to deliver filament material to the nozzle; powder bed 3D printers use a scraper or powder spreader to evenly spread powder material on the printing platform. The design of these automatic feeding systems allows 3D printing equipment to adapt to different material properties and printing process requirements, thereby achieving efficient and stable printing operations.

[0003] For example, Chinese utility model patent (CN222538309U) discloses an automatic feeding device for 3D printers, which solves the following problems: some traditional solutions use threaded feeders to add materials. Threaded feeders cannot accurately control the amount of material added, resulting in insufficient or excessive material and material waste.

[0004] The device includes a tank and a hopper welded to the bottom of the tank. A metering mechanism is located below the hopper, comprising a metering box, a servo motor, a rotating drum, a storage chamber, a baffle, an electric telescopic rod, and a slider. The slider is slidably connected to the storage chamber. A mixing mechanism is located in the middle of the tank, and a cleaning mechanism is located on the inner wall of the tank. The electric telescopic rod drives the slider to slide along the inner wall of the storage chamber, adjusting the space of the storage chamber so that the rotating drum can add multiple masses of material at a time. The servo motor drives the rotating drum to rotate, thus adding material multiple times. By adjusting the servo motor speed, the addition speed can be adjusted, ensuring accurate addition of material to the 3D printer, guaranteeing the precision of material addition, and avoiding material waste.

[0005] When using the above technology, the following technical problems were found in the existing technology: the stirring blades of the device cannot be adjusted in angle, which reduces the mixing efficiency. Different materials have different viscosities, particle sizes and mixing requirements. The stirring blades with a fixed angle are difficult to adapt to the mixing path of diverse materials, which may lead to local accumulation or insufficient mixing. In addition, the rotation speed of the device is fixed, and it is impossible to adjust the stirring force according to the material characteristics, which affects the uniformity of the material composition and leads to problems such as inconsistent strength and structural defects in the printed parts. To address these issues, we designed an automatic feeding 3D printing device to provide an alternative technical solution. Utility Model Content

[0006] Therefore, it is necessary to provide an automatic feeding 3D printing device to address the aforementioned technical problems.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] An automatic feeding 3D printing device includes a base, a pump, a mixing tank, support legs, a processor, and a funnel. The pump is fixed to one end of the top of the base, and four support legs are fixed to the other end of the top of the base. The mixing tank is fixed to one side of the four support legs that are close to each other. The processor is fixed to one side of the top of the mixing tank, and the funnel is fixed to the other side of the top of the mixing tank. A rotating structure is provided inside the mixing tank, and a speed regulating structure is provided at the bottom of the mixing tank.

[0009] In a preferred embodiment of the automatic feeding 3D printing device provided by this utility model, the rotating structure includes a cutting mechanism and a stirring mechanism. The cutting mechanism includes a first rotating column, a fixed box, a second rotating column, and cutting blades. The first rotating column is rotatably connected to the bottom of the inner side of the stirring tank. The fixed box is fixed to the top of the first rotating column. The second rotating column is fixed to the top of the fixed box. The second rotating column is rotatably connected to the sieve plate. Multiple cutting blades are fixed to the outer side of the second rotating column.

[0010] In a preferred embodiment of the automatic feeding 3D printing equipment provided by this utility model, the stirring mechanism includes a stirring plate, a first motor, a worm gear, a worm wheel, a first bevel gear, a second bevel gear, and rotating rods. The first motor is fixed to one end of the inner side of the fixed box, and the worm gear is fixed to the output end of the first motor. The worm gear is meshed with a worm wheel on one side. The worm gear and the worm wheel are rotatably connected to the fixed box. The first bevel gear is fixed to the top of the worm wheel. Rotating rods are rotatably connected to the four sides of the inner side of the fixed box. A second bevel gear is fixed to one side of each of the four rotating rods. The four second bevel gears are meshed with the first bevel gears. The stirring plate is fixed to the side of each of the four rotating rods that is far apart from each other.

[0011] In a preferred embodiment of the automatic feeding 3D printing device provided by this utility model, the speed regulation structure includes a third bevel gear, a fourth bevel gear, a fixed plate, a first rotating shaft, a first gear, and a second gear. Fixed plates are fixed at both ends of the bottom side of the mixing tank. The first rotating shaft is rotatably connected to the side of the two fixed plates that are close to each other. A fourth bevel gear is fixed at one end of the first rotating shaft. A third bevel gear is fixed at the bottom side of the first rotating shaft. The third bevel gear and the fourth bevel gear are meshed together. A first gear is fixed at one end of the outer side of the first rotating shaft, and a second gear is fixed at the other end of the outer side of the first rotating shaft.

[0012] In a preferred embodiment of the automatic feeding 3D printing device provided by this utility model, the speed regulation structure further includes a concave block, a T-shaped slider, a second motor, a screw, a third motor, a second rotating shaft, a third gear, and a fourth gear. The second motor is fixed to the inner side of the bottom of the mixing tank, and the screw is fixed to the output end of the second motor. The T-shaped slider is threadedly connected to the outer side of the screw. The T-shaped slider is slidably connected to the mixing tank. The concave block is fixed to the bottom side of the T-shaped slider, and the third motor is fixed to one side of the concave block. The second rotating shaft is fixed to the output end of the third motor. The second rotating shaft is rotatably connected to the concave block. The third gear is fixed to one end of the outer side of the second rotating shaft, and the fourth gear is fixed to the other end of the outer side of the second rotating shaft.

[0013] In a preferred embodiment of the automatic feeding 3D printing device provided by this utility model, the fourth gear and the second gear are meshed together, and the third gear and the first gear are meshed together. When the fourth gear and the second gear are meshed together, the third gear and the first gear are not connected. When the third gear and the first gear are meshed together, the fourth gear and the second gear are not connected.

[0014] In a preferred embodiment of the automatic feeding 3D printing device provided by this utility model, the pump, the first motor, and the third motor are all electrically connected to the processor.

[0015] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.

[0016] At the same time, through the above technical solutions, this utility model has at least the following beneficial effects:

[0017] This invention provides an automatic feeding 3D printing device. Through the design of a rotating and speed-regulating structure, the device can flexibly adjust the angle and speed of the stirring blades according to the material characteristics. For example, when mixing high-viscosity metal powder and binder, the tilt angle of the stirring blades is increased to enhance the stirring force, and high-speed rotation breaks up agglomerates. For low-viscosity resin materials, the angle is reduced and the speed is lowered to avoid introducing air bubbles through high-speed stirring, ensuring uniform distribution of material components. This fundamentally reduces problems such as strength differences and structural defects in printed parts caused by uneven material mixing. Uniform material mixing also reduces layering and agglomeration in the feeding system, ensuring the continuity of subsequent extrusion or powder spreading. For instance, dynamic adjustment of the stirring blade angle combined with variable frequency speed allows the metal powder and binder to maintain stable rheological properties after mixing, avoiding layer thickness deviations caused by flow rate fluctuations during extrusion. For photocurable resins, precise control of the stirring speed prevents localized aggregation of the curing agent, reducing the risk of deformation in printed parts due to uneven material curing, and improving dimensional accuracy and surface quality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of an automatic feeding 3D printing device according to the present invention;

[0020] Figure 2 This is a side view of an automatic feeding 3D printing device according to the present invention;

[0021] Figure 3 This is a schematic diagram showing the connection between the base and the pump of an automatic feeding 3D printing equipment according to this utility model;

[0022] Figure 4 This is a cross-sectional view of the mixing tank of an automatic feeding 3D printing device according to this utility model;

[0023] Figure 5 This is a schematic diagram showing the connection between the first rotating column and the fixing box of an automatic feeding 3D printing device according to this utility model;

[0024] Figure 6 This is a cross-sectional view of a fixing box for an automatic feeding 3D printing device according to the present invention;

[0025] Figure 7 This is a schematic diagram of the connection between the worm gear and worm wheel in an automatic feeding 3D printing device according to this utility model;

[0026] Figure 8 This is a schematic diagram showing the connection between the mixing plate and the rotating rod of an automatic feeding 3D printing device according to this utility model;

[0027] Figure 9 This is a schematic diagram showing the connection between the first rotating shaft and the first gear of an automatic feeding 3D printing device according to this utility model;

[0028] Figure 10 This is a schematic diagram showing the connection between the second and fourth gears of an automatic feeding 3D printing device according to this utility model.

[0029] In the diagram: 1. Base; 2. Pump; 3. Mixing tank; 4. Support leg; 5. Processor; 6. Funnel; 7. Sieve plate; 8. First rotating column; 9. Fixing box; 10. Second rotating column; 11. Cutting blade; 12. Mixing plate; 13. First motor; 14. Worm gear; 15. Worm wheel; 16. First bevel gear; 17. Second bevel gear; 18. Rotating rod; 19. Third bevel gear; 20. Fourth bevel gear; 21. Fixing plate; 22. First rotating shaft; 23. First gear; 24. Second gear; 25. Concave block; 26. T-shaped slider; 27. Second motor; 28. Screw; 29. ​​Third motor; 30. Second rotating shaft; 31. Third gear; 32. Fourth gear. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0031] As described in the background art, the stirring blades of this device cannot be adjusted in angle, which reduces the mixing efficiency. Different materials have different viscosities, particle sizes and mixing requirements. The stirring blades with a fixed angle are difficult to adapt to the mixing path of diverse materials, which may lead to local accumulation or insufficient mixing. In addition, the device rotates at a fixed speed and cannot adjust the stirring force according to the material characteristics, which in turn affects the uniformity of the material components and causes problems such as inconsistent strength and structural defects in the printed parts.

[0032] To solve this technical problem, this utility model provides an automatic feeding 3D printing device.

[0033] For details, please refer to Figures 1-10An automatic feeding 3D printing device specifically includes: a base 1, a pump 2, a mixing tank 3, support legs 4, a processor 5, and a funnel 6. The pump 2 is fixed to one end of the top of the base 1, and four support legs 4 are fixed to the other end of the top of the base 1. The mixing tank 3 is fixed to one side of the four support legs 4 that are close to each other. The processor 5 is fixed to one side of the top of the mixing tank 3, and the funnel 6 is fixed to the other side of the top of the mixing tank 3. A rotating structure is provided inside the mixing tank 3, and a speed regulating structure is provided at the bottom of the mixing tank 3.

[0034] This invention provides an automatic feeding 3D printing device. Through the design of a rotating and speed-regulating structure, the device can flexibly adjust the angle and speed of the stirring blades according to the material characteristics. For example, when mixing high-viscosity metal powder and binder, the tilt angle of the stirring blades is increased to enhance the stirring force, and high-speed rotation breaks up agglomerates. For low-viscosity resin materials, the angle is reduced and the speed is lowered to avoid introducing air bubbles through high-speed stirring, ensuring uniform distribution of material components. This fundamentally reduces problems such as strength differences and structural defects in printed parts caused by uneven material mixing. Uniform material mixing also reduces layering and agglomeration in the feeding system, ensuring the continuity of subsequent extrusion or powder spreading. For instance, dynamic adjustment of the stirring blade angle combined with variable frequency speed allows the metal powder and binder to maintain stable rheological properties after mixing, avoiding layer thickness deviations caused by flow rate fluctuations during extrusion. For photocurable resins, precise control of the stirring speed prevents localized aggregation of the curing agent, reducing the risk of deformation in printed parts due to uneven material curing, and improving dimensional accuracy and surface quality.

[0035] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] Reference Figures 1-10 An automatic feeding 3D printing device includes a base 1, a pump 2, a mixing tank 3, support legs 4, a processor 5, and a funnel 6. The pump 2 is fixed to one end of the top of the base 1, and four support legs 4 are fixed to the other end of the top of the base 1. The mixing tank 3 is fixed to one side of the four support legs 4 that are close to each other. The processor 5 is fixed to one side of the top of the mixing tank 3, and the funnel 6 is fixed to the other side of the top of the mixing tank 3. A rotating structure is provided inside the mixing tank 3, and a speed regulating structure is provided at the bottom of the mixing tank 3.

[0038] The rotating structure includes a cutting mechanism and a stirring mechanism. The cutting mechanism includes a first rotating column 8, a fixed box 9, a second rotating column 10, and cutting blades 11. The first rotating column 8 is rotatably connected to the bottom of the inner side of the stirring tank 3. The fixed box 9 is fixed to the top of the first rotating column 8. The second rotating column 10 is fixed to the top of the fixed box 9. The second rotating column 10 is rotatably connected to the sieve plate 7. Multiple cutting blades 11 are fixed to the outer side of the second rotating column 10, enabling the device to cut efficiently.

[0039] The stirring mechanism includes a stirring plate 12, a first motor 13, a worm 14, a worm wheel 15, a first bevel gear 16, a second bevel gear 17, and rotating rods 18. The first motor 13 is fixed to one end of the inner side of the fixed box 9. The worm 14 is fixed to the output end of the first motor 13. The worm wheel 15 is meshed with one side of the worm 14. The worm 14 and the worm wheel 15 are rotatably connected to the fixed box 9. The first bevel gear 16 is fixed to the top of the worm wheel 15. The rotating rods 18 are rotatably connected to the four sides of the inner side of the fixed box 9. The second bevel gear 17 is fixed to one side of each of the four rotating rods 18. The four second bevel gears 17 are meshed with the first bevel gear 16. The stirring plate 12 is fixed to the side of each of the four rotating rods 18 that is far apart from each other, so that the device can stir efficiently.

[0040] The speed control structure includes a third bevel gear 19, a fourth bevel gear 20, a fixed plate 21, a first rotating shaft 22, a first gear 23, a second gear 24, a concave block 25, a T-shaped slider 26, a second motor 27, a screw 28, a third motor 29, a second rotating shaft 30, a third gear 31, and a fourth gear 32. Fixed plates 21 are fixed to both ends of the bottom side of the mixing tank 3. A first rotating shaft 22 is rotatably connected to the side of the two fixed plates 21 that are close to each other. A fourth bevel gear 20 is fixed to one end of the first rotating shaft 22. A third bevel gear 19 is fixed to the bottom side of the first rotating column 8. The third bevel gear 19 and the fourth bevel gear 20 are meshed together. A first gear 23 is fixed to one end of the outer side of the first rotating shaft 22, and a second gear 24 is fixed to the other end of the outer side of the first rotating shaft 22. A second motor 27 is fixed to the inner side of the bottom of the mixing tank 3. The output end of the second motor 27... A screw 28 is fixed, and a T-shaped slider 26 is threadedly connected to the outside of the screw 28. The T-shaped slider 26 is slidably connected to the mixing tank 3. A concave block 25 is fixed to the bottom side of the T-shaped slider 26. A third motor 29 is fixed to one side of the concave block 25. A second rotating shaft 30 is fixed to the output end of the third motor 29. The second rotating shaft 30 and the concave block 25 are rotatably connected. A third gear 31 is fixed to one end of the outer side of the second rotating shaft 30, and a fourth gear 32 is fixed to the other end of the outer side of the second rotating shaft 30. The fourth gear 32 is meshed with the second gear 24, and the third gear 31 is meshed with the first gear 23. When the fourth gear 32 and the second gear 24 are meshed, the third gear 31 and the first gear 23 are not connected. When the third gear 31 and the first gear 23 are meshed, the fourth gear 32 and the second gear 24 are not connected, so that the speed of the device can be adjusted.

[0041] Pump 2, first motor 13, and third motor 29 are all electrically connected to processor 5, thus enabling the device to be electrically controlled, greatly saving manpower.

[0042] The first motor 13, the second motor 27, and the third motor 29 all have power-off self-locking capability, which enables the travel of the device to be locked and controlled.

[0043] This invention provides an automatic feeding 3D printing device. Through the design of a rotating and speed-regulating structure, the device can flexibly adjust the angle and speed of the stirring blades according to the material characteristics. For example, when mixing high-viscosity metal powder and binder, the tilt angle of the stirring blades is increased to enhance the stirring force, and high-speed rotation breaks up agglomerates. For low-viscosity resin materials, the angle is reduced and the speed is lowered to avoid introducing air bubbles through high-speed stirring, ensuring uniform distribution of material components. This fundamentally reduces problems such as strength differences and structural defects in printed parts caused by uneven material mixing. Uniform material mixing also reduces layering and agglomeration in the feeding system, ensuring the continuity of subsequent extrusion or powder spreading. For instance, dynamic adjustment of the stirring blade angle combined with variable frequency speed allows the metal powder and binder to maintain stable rheological properties after mixing, avoiding layer thickness deviations caused by flow rate fluctuations during extrusion. For photocurable resins, precise control of the stirring speed prevents localized aggregation of the curing agent, reducing the risk of deformation in printed parts due to uneven material curing, and improving dimensional accuracy and surface quality.

[0044] The operation of the automatic feeding 3D printing equipment provided by this utility model is as follows: The user pours the 3D printing raw material into the mixing tank 3 through the funnel 6. At this time, the smaller raw material is poured into the bottom of the mixing tank 3 through the sieve 7, while the larger raw material remains on the top of the sieve 7. The user then powers on the third motor 29, which drives the second rotating shaft 30 to rotate. The rotation of the second rotating shaft 30 drives the third gear 31 and the fourth gear 32 to rotate. Since the fourth gear 32 is meshed with the second gear 24 on one side, the rotation of the fourth gear 32 drives the second gear 24 to rotate. The rotation of the second gear 24 drives the first rotating shaft 22 and the fourth bevel gear 20 to rotate. The fourth bevel gear 20 is meshed with the third bevel gear 19 on one side, so the rotation of the fourth bevel gear 20 drives the third bevel gear 19 to rotate, which in turn drives the first rotating column. The cutting blade 11 and the stirring plate 12 rotate. The cutting blade 11 can effectively cut the raw material with a larger size at the top of the screen plate 7. All the cut raw material falls into the inner side of the mixing tank 3 through the screen plate 7. At this time, multiple stirring plates 12 stir the raw material inside the mixing tank 3. When facing different raw materials, the user turns on the first motor 13 to rotate. The output end of the first motor 13 drives the worm gear 14 to rotate. Since one side of the worm gear 14 is meshed with the worm wheel 15, the first bevel gear 16 at the top of the worm wheel 15 rotates accordingly. Since the four corners of the top of the first bevel gear 16 are meshed with the second bevel gear 17, the rotation of the first bevel gear 16 drives the second bevel gear 17 to rotate, which in turn drives the rotating rod 18 and the stirring plate 12 to rotate, thereby adjusting the stirring angle of the stirring plate 12. By adjusting the stirring blade angle, the movement trajectory of the material in the mixing chamber can be changed. For example, increasing the tilt angle of the stirring blades enhances the agitation of high-viscosity metal powders or ceramic slurries, preventing particle accumulation; decreasing the angle is suitable for the gentle stirring of low-viscosity resin materials, reducing bubble generation and ensuring uniform distribution of different components at the microscopic level; when a speed change is required, the user energizes the second motor 27, which drives the screw 28 to rotate. Since the screw 28 is threadedly connected to a T-shaped slider 26, the rotation of the screw 28 causes the T-shaped slider 26 to move, and the movement of the T-shaped slider 26 causes the concave block 25 to move. This causes the fourth gear 32 to disengage from the second gear 24 while the third gear 31 re-engages with the first gear 23. Since the radii of the first gear 23, the second gear 24, the third gear 31, and the fourth gear 32 are different, the rotational speed of the first rotating shaft 22 is adjusted, thereby adjusting the rotational speed of the cutting blade 11 and the mixing plate 12. In summary, the automatic feeding 3D printing equipment provided by this utility model achieves synergistic optimization of material cutting accuracy, mixing efficiency, and printing process by setting adjustable-speed cutting blades and mixing blades.This equipment not only adapts to the physical properties of different materials, effectively solving the problems of limited material processing and low efficiency in existing equipment, but also meets the needs of multiple process scenarios through dynamic speed adjustment, enhancing the equipment's intelligence and flexible manufacturing capabilities. With its simple structure and strong practicality, this equipment represents significant progress and innovation compared to existing technologies, possessing promising market application prospects and promotional value, and can effectively promote the efficient application of 3D printing technology in multiple fields.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic feeding 3D printing device, comprising a base (1), a pump (2), a mixing tank (3), support legs (4), a processor (5), and a funnel (6), wherein the pump (2) is fixed to one end of the top of the base (1), four support legs (4) are fixed to the other end of the top of the base (1), the mixing tank (3) is fixed to one side of the four support legs (4) that are close to each other, the processor (5) is fixed to one side of the top of the mixing tank (3), and the funnel (6) is fixed to the other side of the top of the mixing tank (3), characterized in that, The inner side of the mixing tank (3) is provided with a rotating structure, and the bottom side of the mixing tank (3) is provided with a speed regulating structure.

2. The automatic feeding 3D printing equipment according to claim 1, characterized in that, The rotating structure includes a cutting mechanism and a stirring mechanism. The cutting mechanism includes a first rotating column (8), a fixed box (9), a second rotating column (10), and a cutting blade (11). The bottom of the inner side of the stirring tank (3) is rotatably connected to the first rotating column (8). The top of the first rotating column (8) is fixed to the fixed box (9). The top of the fixed box (9) is fixed to the second rotating column (10). The second rotating column (10) is rotatably connected to the sieve plate (7). Multiple cutting blades (11) are fixed to the outer side of the second rotating column (10).

3. The automatic feeding 3D printing equipment according to claim 2, characterized in that, The stirring mechanism includes a stirring plate (12), a first motor (13), a worm (14), a worm wheel (15), a first bevel gear (16), a second bevel gear (17), and a rotating rod (18). The first motor (13) is fixed to one end of the inner side of the fixed box (9). The worm (14) is fixed to the output end of the first motor (13). The worm wheel (15) is meshed with one side of the worm (14). The worm (14) and the worm wheel (15) are rotatably connected to the fixed box (9). The first bevel gear (16) is fixed to the top of the worm wheel (15). The rotating rod (18) is rotatably connected to all four sides of the inner side of the fixed box (9). The second bevel gear (17) is fixed to one side of each of the four rotating rods (18). The four second bevel gears (17) are meshed with the first bevel gear (16). The stirring plate (12) is fixed to the side of each of the four rotating rods (18) that is far away from each other.

4. The automatic feeding 3D printing equipment according to claim 3, characterized in that, The speed regulating structure includes a third bevel gear (19), a fourth bevel gear (20), a fixed plate (21), a first rotating shaft (22), a first gear (23), and a second gear (24). Fixed plates (21) are fixed at both ends of the bottom side of the mixing tank (3). The first rotating shaft (22) is rotatably connected to the side of the two fixed plates (21) that are close to each other. The fourth bevel gear (20) is fixed at one end of the first rotating shaft (22). The third bevel gear (19) is fixed at the bottom side of the first rotating column (8). The third bevel gear (19) and the fourth bevel gear (20) are meshed together. The first gear (23) is fixed at one end of the outer side of the first rotating shaft (22), and the second gear (24) is fixed at the other end of the outer side of the first rotating shaft (22).

5. An automatic feeding 3D printing device according to claim 4, characterized in that, The speed regulating structure also includes a concave block (25), a T-shaped slider (26), a second motor (27), a screw (28), a third motor (29), a second rotating shaft (30), a third gear (31), and a fourth gear (32). The second motor (27) is fixed to the inner side of the bottom of the mixing tank (3). The output end of the second motor (27) is fixed to the screw (28). The outer side of the screw (28) is threadedly connected to the T-shaped slider (26). The T-shaped slider (26) and the mixing tank (3) are slidably connected. The bottom side of the T-shaped slider (26) is fixed to the concave block (25). The third motor (29) is fixed to one side of the concave block (25). The output end of the third motor (29) is fixed to the second rotating shaft (30). The second rotating shaft (30) and the concave block (25) are rotatably connected. One end of the outer side of the second rotating shaft (30) is fixed to the third gear (31). The other end of the outer side of the second rotating shaft (30) is fixed to the fourth gear (32).

6. The automatic feeding 3D printing equipment according to claim 5, characterized in that, The fourth gear (32) and the second gear (24) are meshed together, and the third gear (31) and the first gear (23) are meshed together. When the fourth gear (32) and the second gear (24) are meshed together, the third gear (31) and the first gear (23) are not connected. When the third gear (31) and the first gear (23) are meshed together, the fourth gear (32) and the second gear (24) are not connected.

7. An automatic feeding 3D printing device according to claim 6, characterized in that, The pump (2), the first motor (13), and the third motor (29) are all electrically connected to the processor (5).

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