Extrusion type tablet medicine 3D printer

Abstract

The invention belongs to the technical field of medicine 3D printers, and particularly relates to an extrusion type tablet medicine 3D printer which comprises a base. The top face of the base is rotationally connected with a rotating ring, and the rotating ring is driven by a first servo motor. The top surface of the base is fixedly connected with a supporting seat in the middle of the rotating ring; the positions, close to the bottom, of the three faces of the supporting base are each fixedly connected with a pair of symmetrically-arranged guide rails, and gaps are reserved between the guide rails and the top face of the base. A portal frame is connected between the paired guide rails in a shared and sliding manner and is driven by a servo motor II; the top of the portal frame is slidably connected with extrusion heads, the extrusion heads are driven by a third servo motor, and through the arrangement of the multiple extrusion heads, a medicine shell, a medicine core and a medicine cover can be printed separately, so that different medicines can be used among all the structures, the problem of medicine pollution caused when a single extrusion head is used is avoided, and the efficiency is improved. And meanwhile, distributed batch printing can also improve the printing efficiency.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of 3D printing of medicine, in particular to an extrusion type tablet medicine 3D printer. BACKGROUND

[0002] 3D printing is a technology that uses powder metal or plastic and other materials that can be bonded to construct objects through layer-by-layer printing based on digital model files. It is commonly used in mold manufacturing and industrial design for manufacturing models. However, with the continuous development of 3D printing and the demand for customized drug delivery in the pharmaceutical industry, drug 3D printing machines have also begun to emerge.

[0003] Some existing technologies also propose some drug 3D printing machine solutions. For example, a patent application with publication number CN112644019A discloses a drug preparation 3D printer, which includes a printer body, the printer body includes a printing nozzle assembly, a powder supply and powder laying mechanism, and a printing platform. During the powder supply and laying process, the printing nozzle assembly does not work. When the printing nozzle assembly works, the powder supply and laying mechanism does not move. That is, during a printing process, the powder laying and printing move separately, reducing the possibility of contamination of the printing nozzle during the powder laying process, thereby prolonging the life of the nozzle and improving the efficiency of printing drugs.

[0004] In the above-mentioned technology, the drug 3D printer uses a binder jetting method to make the drug powder stick together into particles and form a structure. Although the printed drug can meet the requirements of a specific shape, it is difficult to process a drug shell with a large difference in composition from the drug body, and thus it is not possible to print a more complex tablet-shaped drug.

[0005] Therefore, the present application provides an extrusion type tablet medicine 3D printer. SUMMARY

[0006] To make up for the shortcomings of the prior art and solve at least one technical problem in the background art.

[0007] The technical solution adopted by this invention to solve its technical problem is as follows: An extrusion-type tablet drug 3D printer according to this invention includes a base; a rotating ring is rotatably connected to the top surface of the base, and the rotating ring is driven by a servo motor; a support seat is fixedly connected to the top surface of the base at the center of the rotating ring; a pair of symmetrically arranged guide rails are fixedly connected to three sides of the support seat near the bottom, and a gap is left between the guide rails and the top surface of the base; a gantry frame is slidably connected between the pairs of guide rails, and the gantry frame is driven by a servo motor; an extrusion head is slidably connected to the top of the gantry frame, and the extrusion head is driven by a servo motor; four evenly arranged placement slots are opened on the top surface of the rotating ring, and the placement slots penetrate the rotating ring; a receiving frame is fixedly connected to the inner wall of the placement slots; an electric push rod is embedded between the pairs of guide rails on the top surface of the base; a receiving plate is provided on the top surface of the receiving frame.

[0008] Preferably, a guide tube is fixedly connected to one side of the extruder head; a mixing tube is fixedly connected to the top of the guide tube on the side away from the extruder head; the mixing tube is perpendicular to the guide tube and fixedly connected to the extruder head; a hopper is fixedly connected to the top surface of the mixing tube; three evenly arranged drive seats are fixedly connected to the top surface of the support base, and the drive seats are arranged in a one-to-one correspondence with the paired guide rails; a rotating frame is rotatably connected to the top surface of the drive seat, and the rotating frame is driven by a servo motor; multiple evenly arranged storage tubes are fixedly connected to the surface of the rotating frame; a feeding assembly is installed at the bottom of the storage tube; the feeding assembly is used to deliver the drug in the storage tube to the hopper.

[0009] Preferably, the feeding assembly includes a discharge pipe; the discharge pipe is fixedly connected to the bottom surface of the storage pipe and communicates with the interior of the storage pipe; a screw rod is rotatably connected inside the discharge pipe; a drive rod is fixedly connected to the side of the screw rod away from the discharge pipe opening, and the drive rod extends to the outside of the discharge pipe; a drive motor is fixedly connected to the top surface of the drive seat at the drive rod; a sleeve is slidably connected to the output end of the drive motor; a connecting ring is fixedly connected to the outside of the sleeve; a drive assembly is installed on the top surface of the drive seat at the corresponding position of the connecting ring; the drive assembly is used to drive the connecting ring to move; a magnet is fixedly connected inside the sleeve, and the drive rod is made of magnetizable metal.

[0010] Preferably, the drive assembly includes a pair of clamps, and the bottoms of the two clamps are fixed together; the clamps are slidably connected to the top surface of the drive seat and are driven by a cylinder; a plurality of evenly arranged ball bearings are rolledly connected to the side surfaces of the two clamps that are close to each other; and the connecting ring is located between the two clamps.

[0011] Preferably, the inner wall of the sleeve is fixedly connected to a plurality of pairs of evenly arranged sliding rods, and the ends of the symmetrical sliding rods located outside the sleeve are fixedly connected to each other; the ends of the pairs of sliding rods located inside the sleeve are rotatably connected to a squeezing roller; a sleeve is fixedly connected to the surface of the drive rod; the diameter of the sleeve near the end of the sleeve is smaller than the diameter of the end away from the sleeve.

[0012] Preferably, the end face of the drive rod has a through hole, and the through hole passes through the drive rod and the screw rod; a top rod is slidably connected inside the through hole; a cover plate is rotatably connected to the end of the discharge pipe away from the drive seat, and a torsion spring is installed at the rotatable connection between the cover plate and the discharge pipe.

[0013] Preferably, a pair of spiral rods are rotatably connected inside the feed tube, and a heating wire is installed on the inner wall of the feed tube; a drive motor is fixedly connected to the end of the feed tube away from the extrusion head, and the drive motor drives the two spiral rods to rotate synchronously through a gear set.

[0014] Preferably, a stirring rod is provided inside the mixing tube; a support plate is fixedly connected to the top surface of the hopper, and the stirring rod is rotatably connected to the bottom surface of the support plate; a transmission rod is rotatably connected to the end of the support plate away from the stirring rod; the transmission rod is connected to the stirring rod through a gear set inside the support plate; the side of the transmission rod away from the support plate is connected to the output shaft of the second drive motor through a belt.

[0015] Preferably, a support arm is rotatably connected to the top surface of the base; the support arm is L-shaped and driven by a servo motor; an electric push rod is fixedly connected to the side of the support arm near the rotating ring; a plurality of evenly arranged vacuum suction cups are fixedly connected to the telescopic end of the electric push rod, and the vacuum suction cups are arranged in a one-to-one correspondence with the medicines printed on the receiving plate.

[0016] Preferably, a connecting block is fixedly connected to the bottom surface of the receiving plate; a slot is provided on the bottom surface of the connecting block; and a plug rod is fixedly connected to the telescopic end of the electric push rod, and the plug rod is compatible with the slot.

[0017] The beneficial effects of this invention are as follows: 1. The extrusion tablet 3D printer of the present invention, by setting multiple extrusion heads, enables the separate printing of the drug shell, drug core and drug cap, so that different drugs can be used for each structure, thereby avoiding the drug contamination problem when using a single extrusion head. At the same time, distributed batch printing can also improve printing efficiency.

[0018] 2. The extrusion tablet 3D printer of the present invention introduces the drug into the mixing tube through the hopper, and then guides it into the extrusion head through the guide tube at the bottom of the mixing tube, thus completing the rapid replacement of the drug. At the same time, the drugs in multiple storage tubes are sequentially introduced into the hopper to achieve drug mixing, thereby enabling the printing of drugs that better meet the needs of users. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the rotating ring structure in this invention; Figure 3 This is a schematic diagram of the extrusion head in this invention; Figure 4 This is a schematic diagram of the drive seat in this invention; Figure 5 This is a schematic diagram of the discharge pipe in this invention; Figure 6 This is a cross-sectional view of the discharge pipe in this invention; Figure 7 This is a schematic diagram of the clamping plate in this invention; Figure 8 This is a cross-sectional view of the sleeve in this invention; Figure 9 This is a schematic diagram of the structure of the screw rod one in this invention; Figure 10 This is a cross-sectional view of the feed tube in this invention; Figure 11 This is a schematic diagram of the vacuum chuck in this invention; Figure 12 This is a cross-sectional view of the Chinese herbal tablets of the present invention; In the diagram: 1. Base; 2. Rotating ring; 3. Support seat; 4. Guide rail; 5. Gantry frame; 6. Extrusion head; 7. Placement slot; 8. Receiving frame; 801. Electric push rod one; 9. Receiving plate; 10. Feed guide pipe; 11. Mixing pipe; 12. Hopper; 13. Drive seat; 14. Rotating frame; 15. Storage pipe; 16. Discharge pipe; 17. Screw rod one; 18. Drive rod; 19. Drive motor one; 20. Sleeve; 21. Connecting ring; 22. Magnet block; 23. Clamping plate; 24. Ball bearing; 25. Slide rod; 26. Extrusion roller; 27. Sleeve; 28. Through hole; 29. ​​Top rod; 30. Cover plate; 31. Spiral rod II; 32. Drive motor II; 33. Stirring rod; 34. Support plate; 35. Transmission rod; 36. Support arm; 37. Electric push rod II; 38. Vacuum suction cup; 39. Connecting block; 40. Slot; 41. Insert rod. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] like Figures 1 to 3 As shown in the embodiment of the present invention, an extrusion tablet 3D printer includes a base 1; a rotating ring 2 is rotatably connected to the top surface of the base 1, and the rotating ring 2 is driven by a servo motor; a support base 3 is fixedly connected to the top surface of the base 1 at the middle of the rotating ring 2; a pair of symmetrically arranged guide rails 4 are fixedly connected to three sides of the support base 3 near the bottom, and a gap is left between the guide rails 4 and the top surface of the base 1; a gantry 5 is slidably connected between the pairs of guide rails 4, and the gantry 5 is driven by a servo motor; an extrusion head 6 is slidably connected to the top of the gantry 5, and the extrusion head 6... The head 6 is driven by a servo motor; the top surface of the rotating ring 2 has four evenly arranged placement slots 7, and the placement slots 7 penetrate the rotating ring 2; a receiving frame 8 is fixedly connected to the inner wall of the placement slot 7; an electric push rod 801 is embedded between the pairs of guide rails 4 on the top surface of the base 1; a receiving plate 9 is provided on the top surface of the receiving frame 8; during operation, in order to facilitate the printing of drug shells and cores with large differences in chemical composition, the embodiment of the present invention can be used. First, the side without guide rail 4 is taken as the starting end, and the receiving plate 9 at that point rotates to its adjacent position under the drive of the placement slots 7 on the surface of the rotating ring 2. Between the paired guide rails 4 on one side, the extruder head 6 moves in the X and Y axes by sliding on the surface of the gantry 5 and between the paired guide rails 4. Meanwhile, the electric actuator 801 moves the receiving plate 9 on the receiving frame 8 up and down, thus completing the movement of the extruder head 6 in the Z axis direction. This allows the extruder head 6 to print multiple desired drug capsules on the surface of the receiving plate 9. Afterwards, the rotating ring 2 drives the receiving plate 9 to rotate to the next pair of guide rails 4 via the placement groove 7, where the extruder head 6 will print the desired drug capsule inside the drug capsule. The required core is then printed, and the rotating ring 2 drives the receiving plate 9 to rotate between the next pair of guide rails 4 via the placement groove 7. The extruder 6 at this point will complete the final printing of the cap. Finally, the rotating ring 2 drives the receiving plate 9 to rotate back to the starting end via the placement groove 7, and the user can remove the finished drug. By setting multiple extruders 6, the drug shell, core, and cap can be printed separately, so that different drugs can be used for each structure. This avoids the drug contamination problem when using a single extruder 6. At the same time, distributed batch printing can also improve printing efficiency.

[0023] like Figure 1 , Figure 4 and Figure 5As shown, a guide tube 10 is fixedly connected to one side of the extrusion head 6; a mixing tube 11 is fixedly connected to the top of the guide tube 10 on the side away from the extrusion head 6; the mixing tube 11 is perpendicular to the guide tube 10 and fixedly connected to the extrusion head 6; a hopper 12 is fixedly connected to the top surface of the mixing tube 11; three evenly arranged drive seats 13 are fixedly connected to the top surface of the support base 3, and the drive seats 13 are arranged in a one-to-one correspondence with the paired guide rails 4; a rotating frame 14 is rotatably connected to the top surface of the drive seat 13, and the rotating frame 14 is driven by a servo motor; multiple evenly arranged storage tubes 15 are fixedly connected to the surface of the rotating frame 14; a feeding assembly is installed at the bottom of the storage tube 15; the feeding assembly is used for... The medication in the storage tube 15 is delivered to the hopper 12. During operation, when different medications, such as pills, cores, or caps, need to be printed, the rotating frame 14 on the top surface of the drive seat 13 will rotate the storage tube 15, thereby rotating the storage tube 15 containing the required medication to the hopper 12 of the extruder head 6. Then, the feeding assembly will guide the medication in the storage tube 15 into the hopper 12, and then from the hopper 12 into the mixing tube 11. Finally, the medication will be guided into the extruder head 6 through the guide tube 10 at the bottom of the mixing tube 11. This completes the rapid replacement of the medication. At the same time, the medications in multiple storage tubes 15 are sequentially introduced into the hopper 12 to achieve the mixing of the medications, thereby enabling the printing of tablets that better meet the user's needs.

[0024] like Figure 5 , Figure 6 and Figure 9As shown, the feeding assembly includes a discharge pipe 16; the discharge pipe 16 is fixedly connected to the bottom surface of the storage pipe 15 and communicates with the interior of the storage pipe 15; a screw rod 17 is rotatably connected inside the discharge pipe 16; a drive rod 18 is fixedly connected to the side of the screw rod 17 away from the opening of the discharge pipe 16, and the drive rod 18 extends to the outside of the discharge pipe 16; a drive motor 19 is fixedly connected to the top surface of the drive base 13 at the drive rod 18; a sleeve 20 is slidably connected to the output end of the drive motor 19; a connecting ring 21 is fixedly connected to the outside of the sleeve 20; a drive assembly is installed on the top surface of the drive base 13 at the corresponding position of the connecting ring 21; the drive assembly is used to drive the connecting ring 21 to move; a magnet block 22 is fixedly connected inside the sleeve 20, and the drive rod 18 is made of magnetizable metal. During operation, when it is necessary to discharge the medicine from the storage tube 15, the rotating frame 14 will drive the storage tube 15 to rotate to the hopper 12. Then, the drive assembly at the drive seat 13 will push the connecting ring 21 and the sleeve 20 fixed to the connecting ring 21 towards the drive rod 18, and finally insert the drive rod 18 into the sleeve 20. Then, it will be attracted by the magnet 22 in the sleeve 20. At this time, the drive motor 19 will drive the sleeve 20 to rotate, and the sleeve 20 will drive the drive rod 18 to rotate through the magnet 22. Finally, the drive rod 18 will drive the screw rod 17 to rotate, so that the screw rod 17 can discharge the medicine from the storage tube 15. At the same time, by controlling the number of rotations of the drive motor 19, the discharge amount of the medicine can be controlled, so that the user can control the ratio between various medicines when mixing medicines.

[0025] like Figure 5 and Figure 7 As shown, the drive assembly includes a pair of clamping plates 23, with the bottoms of the two clamping plates 23 fixedly connected together; the clamping plates 23 are slidably connected to the top surface of the drive seat 13 and are driven by a cylinder; a plurality of evenly arranged ball bearings 24 are rolledly connected to the surface of the two clamping plates 23 on the side that is close to each other; the connecting ring 21 is located between the two clamping plates 23; during operation, when the drive assembly needs to drive the sleeve 20 to move, the cylinder will push the pair of clamping plates 23 to move, thereby driving the connecting ring 21 and the sleeve 20 between the pair of clamping plates 23 to move. When the sleeve 20 rotates, it will also drive the connecting ring 21 on its surface to rotate. Since the clamping plates 23 are rolledly connected to the side that is close to each other, when the sleeve 20 drives the connecting ring 21 to rotate, the roller will rotate under the drive of the connecting ring 21, thereby reducing the friction between the clamping plates 23 and the connecting ring 21, and thus improving their service life.

[0026] like Figure 5 and Figure 8As shown, the inner wall of the sleeve 20 is fixedly connected to multiple pairs of evenly arranged sliding rods 25, and the ends of the symmetrical sliding rods 25 located outside the sleeve 20 are fixedly connected to each other; the ends of the pairs of sliding rods 25 located inside the sleeve 20 are rotatably connected to the extrusion rollers 26; a sleeve 27 is fixedly connected to the surface of the drive rod 18; the diameter of the sleeve 27 near the sleeve 20 is smaller than the diameter of its end away from the sleeve 20; during operation, when the sleeve 27 moves toward the drive rod 18, the... The squeezing roller 26 at the end of the slide rod 25 will contact the surface of the sleeve 27. Since the diameter of the end near the sleeve 20 is smaller than the diameter of the end away from the sleeve 20, the squeezing roller 26 will move towards the inner wall of the sleeve 27 under the squeezing of the sleeve 27, and eventually get stuck between the outer wall of the sleeve 27 and the inner wall of the sleeve 20, thereby locking the sleeve 27 and reducing the slippage between the sleeve 27 and the sleeve 20 when the sleeve 20 drives the sleeve 27 and the drive rod 18 to rotate.

[0027] like Figure 5 , Figure 6 and Figure 9 As shown, the drive rod 18 has a through hole 28 on its end face, and the through hole 28 passes through the drive rod 18 and the screw rod 17; a top rod 29 is slidably connected inside the through hole 28; a cover plate 30 is rotatably connected to the end of the discharge pipe 16 away from the drive seat 13, and a torsion spring is installed at the rotatable connection between the cover plate 30 and the discharge pipe 16; during operation, when the sleeve 20 moves toward the drive rod 18, the magnet block 22 will squeeze the top rod 29 at the through hole 28, causing the top rod 29 to squeeze the cover plate 30, thereby causing the cover plate 30 to deflect, thus opening the end of the discharge pipe 16 and compressing the torsion spring, so that the medicine can be smoothly discharged. When the sleeve 20 moves away from the drive rod 18, the compressed torsion spring recovers and drives the cover plate 30 to squeeze the top rod 29, so that the top rod 29 is pushed back into the through hole 28, thereby completing the reset of the top rod 29.

[0028] like Figure 3 and Figure 10 As shown, a pair of spiral rods 31 are rotatably connected inside the feed tube 10, and a heating wire is installed on the inner wall of the feed tube 10; a drive motor 32 is fixedly connected to the end of the feed tube 10 away from the extruder head 6, and the drive motor 32 drives the two spiral rods 31 to rotate synchronously through a gear set; during operation, when the medicine in the mixing tube 11 enters the feed tube, the drive motor 32 will drive the two spiral rods 31 to rotate synchronously, thereby sending the medicine in the feed tube into the extruder head 6. At the same time, the design of the double spiral rods 31 can also mix and extrude the medicine while conveying it, so that the medicines with different components can be mixed together more fully.

[0029] like Figure 3As shown, a stirring rod 33 is provided inside the mixing tube 11; a support plate 34 is fixedly connected to the top surface of the hopper 12, and the stirring rod 33 is rotatably connected to the bottom surface of the support plate 34; a transmission rod 35 is rotatably connected to the end of the support plate 34 away from the stirring rod 33; the transmission rod 35 is connected to the stirring rod 33 through a gear set inside the support plate 34; the side of the transmission rod 35 away from the support plate 34 is connected to the output shaft of the second drive motor 32 through a belt; during operation, while the second drive motor 32 drives the second screw rod 31 to rotate, the second drive motor 32 also drives the transmission rod 35 to rotate through the belt, and the rotating transmission rod 35 will drive the stirring rod 33 to rotate in the mixing tube, thereby mixing the medicine in the mixing tube 11, so that the medicine can be mixed before entering the guide tube 10, avoiding the medicine not being fully mixed in the guide tube due to the guide tube 10 being too short.

[0030] like Figure 1 and Figure 11 As shown, a support arm 36 is rotatably connected to the top surface of the base 1; the support arm 36 is L-shaped and driven by a servo motor; an electric push rod 37 is fixedly connected to the side of the support arm 36 near the rotating ring 2; multiple evenly arranged vacuum suction cups 38 are fixedly connected to the telescopic end of the electric push rod, and the vacuum suction cups 38 are arranged in a one-to-one correspondence with the medicines printed on the receiving plate 9; during operation, after the tablets are printed on the surface of the receiving plate 9 and return to the starting end under the drive of the rotating ring 2, the support arm 36 will rotate. The support arm 36 rotates, and the electric actuator 37 and vacuum suction cup 38 at its end rotate to the top of the receiving plate 9. Then, the electric actuator 37 drives the vacuum suction cup 38 to descend, so that the vacuum suction cup 38 adheres to the top surface of the tablet and adsorbs the tablet. Then, the electric actuator 37 drives the vacuum suction cup 38 to rise, so that the tablet is taken away from the surface of the receiving plate 9. After that, the support arm 36 rotates again to remove the adsorbed tablet from the top of the receiving plate 9. This frees up the printing area of ​​the receiving plate 9 and also makes it convenient for the user to collect the tablet.

[0031] like Figures 1 to 2 As shown, a connecting block 39 is fixedly connected to the bottom surface of the receiving plate 9; a slot 40 is provided on the bottom surface of the connecting block 39; an insert rod 41 is fixedly connected to the telescopic end of the electric push rod 801, and the insert rod 41 is adapted to the slot 40; during operation, when the electric push rod 801 rises, the insert rod 41 at the telescopic end of the electric push rod 801 is always inserted into the slot 40 on the bottom surface of the connecting block 39, thereby preventing the receiving plate 9 from tipping over due to uneven force on the receiving plate 9 during the printing process.

[0032] During operation, to facilitate the printing of drug shells and cores with significantly different chemical compositions, this embodiment of the invention can be used. First, starting from the side without guide rail 4, the receiving plate 9, driven by the groove 7 on the surface of the rotating ring 2, rotates to the adjacent pair of guide rails 4. At this time, the extruder 6 slides on the surface of the gantry 5, and the gantry 5 slides between the pair of guide rails 4, enabling the extruder 6 to move in the X and Y axes. Meanwhile, the electric actuator 801 drives the receiving plate 9 on the receiving frame 8 to move up and down, thus completing the movement of the extruder 6 in the Z axis direction. Therefore, the extruder 6 can print multiple required drug shells on the surface of the receiving plate 9. Afterwards, the rotating ring 2 further... The groove 7 drives the receiving plate 9 to rotate to the next pair of guide rails 4, where the extruder 6 prints the required core inside the drug case. Then, the rotating ring 2 drives the receiving plate 9 to rotate to the next pair of guide rails 4 via the placement groove 7, where the extruder 6 completes the printing of the final drug cap. Finally, the rotating ring 2 drives the receiving plate 9 to rotate back to the starting end via the placement groove 7, and the user can remove the finished drug. By setting up multiple extruders 6, the drug case, core, and cap can be printed separately, allowing different drugs to be used for each structure. This avoids the drug contamination problem when using a single extruder 6, and distributed batch printing also improves printing efficiency.

[0033] When it is necessary to print the capsule, core, or cap of a drug with different ingredients, the rotating frame 14 on the top surface of the drive base 13 will drive the storage tube 15 to rotate, thereby rotating the storage tube 15 containing the required drug to the hopper 12 of the extruder head 6. Then, the feeding component will introduce the drug in the storage tube 15 into the hopper 12, and then from the hopper 12 into the mixing tube 11. Then, the drug is introduced into the extruder head 6 through the guide tube 10 at the bottom of the mixing tube 11. This completes the quick replacement of the drug. At the same time, the drugs in multiple storage tubes 15 are sequentially introduced into the hopper 12 to achieve drug mixing, thereby enabling the printing of tablets that better meet the user's needs.

[0034] When it is necessary to discharge the medicine from the storage tube 15, the rotating frame 14 will drive the storage tube 15 to rotate to the hopper 12. Then, the drive assembly at the drive seat 13 will push the connecting ring 21 and the sleeve 20 fixed to the connecting ring 21 towards the drive rod 18, and finally insert the drive rod 18 into the sleeve 20. Then, it will be attracted by the magnet 22 in the sleeve 20. At this time, the drive motor 19 drives the sleeve 20 to rotate, and the sleeve 20 will drive the drive rod 18 to rotate through the magnet 22. Finally, the drive rod 18 drives the screw rod 17 to rotate, so that the screw rod 17 can discharge the medicine from the storage tube 15. At the same time, by controlling the number of rotations of the drive motor 19, the discharge amount of the medicine can be controlled, so that the user can control the ratio between various medicines when mixing medicines.

[0035] When the drive assembly needs to move the sleeve 20, the cylinder pushes the pair of clamping plates 23 to move, which in turn drives the connecting ring 21 between the pair of clamping plates 23 and the sleeve 20 to move. When the sleeve 20 rotates, it also drives the connecting ring 21 on its surface to rotate. Since the clamping plates 23 are connected to rollers on the side that are close to each other, when the sleeve 20 drives the connecting ring 21 to rotate, the rollers will rotate under the drive of the connecting ring 21, thereby reducing the friction between the clamping plates 23 and the connecting ring 21, and thus improving the service life of both.

[0036] When the sleeve 27 moves toward the drive rod 18, the squeezing roller 26 at the end of the paired slide rod 25 will contact the surface of the sleeve 27. Since the diameter of the end near the sleeve 20 is smaller than the diameter of the end away from the sleeve 20, the squeezing roller 26 will move toward the inner wall of the sleeve 27 under the squeezing of the sleeve 27, and finally get stuck between the outer wall of the sleeve 27 and the inner wall of the sleeve 20, thereby locking the sleeve 27 and reducing the slippage between the sleeve 27 and the sleeve 20 when the sleeve 20 drives the sleeve 27 and the drive rod 18 to rotate.

[0037] When the sleeve 20 moves toward the drive rod 18, the magnet 22 presses the push rod 29 at the through hole 28, causing the push rod 29 to press the cover plate 30, which in turn causes the cover plate 30 to deflect, thereby opening the end of the discharge tube 16 and compressing the torsion spring, allowing the medicine to be discharged smoothly. When the sleeve 20 moves away from the drive rod 18, the compressed torsion spring recovers and drives the cover plate 30 to press the push rod 29, causing the push rod 29 to be pushed back into the through hole 28, thus completing the reset of the push rod 29.

[0038] When the agent in the mixing tube 11 enters the guide tube, the drive motor 2 32 will drive the two screw rods 2 31 to rotate synchronously, thereby sending the agent in the guide tube into the extruder 6. At the same time, the design of the double screw rods 2 31 can also mix and extrude the agent while conveying it, so that the agents with different components can be mixed together more fully.

[0039] While the second drive motor 32 drives the second screw rod 31 to rotate, the second drive motor 32 also drives the transmission rod 35 to rotate via the belt. The rotating transmission rod 35 then drives the stirring rod 33 to rotate in the mixing chamber, thereby mixing the medicine in the mixing tube 11. This ensures that the medicine is mixed before entering the guide tube 10, preventing the medicine from not being fully mixed in the guide tube due to the guide tube 10 being too short.

[0040] After the tablet is printed on the surface of the receiving plate 9 and returns to the starting end under the drive of the rotating ring 2, the support arm 36 will rotate, and the electric push rod 37 and vacuum suction cup 38 at its end will rotate to the top of the receiving plate 9. Then, the electric push rod 37 drives the vacuum suction cup 38 to descend, so that the vacuum suction cup 38 adheres to the top surface of the tablet and adsorbs the tablet. Then, the electric push rod 37 drives the vacuum suction cup 38 to rise, so that the tablet is taken away from the surface of the receiving plate 9. After that, the support arm 36 rotates again to remove the adsorbed tablet from the top of the receiving plate 9. This frees up the printing area of ​​the receiving plate 9 and also makes it convenient for the user to collect the tablet.

[0041] When the electric actuator 801 rises, the insertion rod 41 at the telescopic end of the electric actuator 801 is always inserted into the slot 40 on the bottom surface of the connecting block 39. Thus, through the limiting effect of the insertion rod 41 and the connecting block 39, the receiving plate 9 is prevented from tipping over due to uneven force during the printing process.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An extrusion-type tablet pharmaceutical 3D printer, characterized in that: The system includes a base; a rotating ring is rotatably connected to the top surface of the base, and the rotating ring is driven by a servo motor; a support seat is fixedly connected to the top surface of the base at the center of the rotating ring; a pair of symmetrically arranged guide rails are fixedly connected to three sides of the support seat near the bottom, and a gap is left between the guide rails and the top surface of the base; a gantry frame is slidably connected between the pairs of guide rails, and the gantry frame is driven by a servo motor; an extrusion head is slidably connected to the top of the gantry frame, and the extrusion head is driven by a servo motor; four evenly arranged placement slots are opened on the top surface of the rotating ring, and the placement slots penetrate the rotating ring; a receiving frame is fixedly connected to the inner wall of the placement slots; an electric push rod is embedded between the pairs of guide rails on the top surface of the base; a receiving plate is provided on the top surface of the receiving frame.

2. The extrusion tablet 3D printer according to claim 1, characterized in that: A guide tube is fixedly connected to one side of the extruder head; a mixing tube is fixedly connected to the top of the guide tube on the side away from the extruder head; the mixing tube is perpendicular to the guide tube and fixedly connected to the extruder head; a hopper is fixedly connected to the top surface of the mixing tube; three evenly arranged drive seats are fixedly connected to the top surface of the support base, and the drive seats are arranged in a one-to-one correspondence with the paired guide rails; a rotating frame is rotatably connected to the top surface of the drive seat, and the rotating frame is driven by a servo motor; multiple evenly arranged storage tubes are fixedly connected to the surface of the rotating frame; a feeding assembly is installed at the bottom of the storage tube; the feeding assembly is used to deliver the drug in the storage tube to the hopper.

3. The extrusion tablet 3D printer according to claim 2, characterized in that: The feeding assembly includes a discharge pipe; the discharge pipe is fixedly connected to the bottom surface of the storage pipe and communicates with the interior of the storage pipe; a screw rod is rotatably connected inside the discharge pipe; a drive rod is fixedly connected to the side of the screw rod away from the discharge pipe opening, and the drive rod extends to the outside of the discharge pipe; a drive motor is fixedly connected to the top surface of the drive base at the drive rod; a sleeve is slidably connected to the output end of the drive motor; a connecting ring is fixedly connected to the outside of the sleeve; a drive assembly is installed on the top surface of the drive base at the corresponding position of the connecting ring; the drive assembly is used to drive the connecting ring to move; a magnet is fixedly connected inside the sleeve, and the drive rod is made of magnetizable metal.

4. The extrusion tablet 3D printer according to claim 3, characterized in that: The drive assembly includes a pair of clamps, with the bottoms of the two clamps fixed together; the clamps are slidably connected to the top surface of the drive seat and driven by a cylinder; a plurality of evenly arranged ball bearings are rolled on the side surfaces of the two clamps that are close to each other; and the connecting ring is located between the two clamps.

5. The extrusion tablet 3D printer according to claim 4, characterized in that: The inner wall of the sleeve is fixedly connected to multiple pairs of evenly arranged sliding rods, and the ends of the symmetrical sliding rods located outside the sleeve are fixedly connected to each other; the ends of the pairs of sliding rods located inside the sleeve are rotatably connected to a squeezing roller; a sleeve is fixedly connected to the surface of the drive rod; the diameter of the sleeve near the end of the sleeve is smaller than the diameter of the end away from the sleeve.

6. The extrusion tablet 3D printer according to claim 5, characterized in that: The drive rod has a through hole on its end face, and the through hole passes through the drive rod and the screw rod; a top rod is slidably connected inside the through hole; a cover plate is rotatably connected to the end of the discharge pipe away from the drive seat, and a torsion spring is installed at the rotatable connection between the cover plate and the discharge pipe.

7. The extrusion tablet 3D printer according to claim 2, characterized in that: The feed tube is internally connected to a pair of spiral rods, and a heating wire is installed on the inner wall of the feed tube; a drive motor is fixedly connected to the end of the feed tube away from the extrusion head, and the drive motor drives the two spiral rods to rotate synchronously through a gear set.

8. The extrusion tablet 3D printer according to claim 7, characterized in that: The mixing tube is equipped with a stirring rod inside; a support plate is fixedly connected to the top surface of the hopper, and the stirring rod is rotatably connected to the bottom surface of the support plate; a transmission rod is rotatably connected to the end of the support plate away from the stirring rod; the transmission rod is connected to the stirring rod through a gear set inside the support plate; the side of the transmission rod away from the support plate is connected to the output shaft of the second drive motor through a belt.

9. The extrusion tablet 3D printer according to claim 1, characterized in that: The top surface of the base is rotatably connected to a support arm; the support arm is L-shaped and driven by a servo motor; an electric push rod is fixedly connected to the side of the support arm near the rotating ring; multiple evenly arranged vacuum suction cups are fixedly connected to the telescopic end of the electric push rod, and the vacuum suction cups are arranged in a one-to-one correspondence with the medicines printed on the receiving plate.

10. The extrusion tablet 3D printer according to claim 1, characterized in that: A connecting block is fixedly connected to the bottom surface of the receiving plate; a slot is provided on the bottom surface of the connecting block; a plug rod is fixedly connected to the telescopic end of the electric push rod, and the plug rod is compatible with the slot.

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