Tablet powder recycling and tableting device

Abstract

The utility model relates to the technical field of medicine powder recovery, specifically relates to a tablet medicine powder recovery tableting device, including work table, the top fixed connection of work table is used for the rotary tableting machine of the medicine powder compression into medicine piece, the side wall fixed connection of work table's top near rotary tableting machine is used for the feeding tank of storage, the bottom shape of feeding tank is tapered, the bottom fixed connection of feeding tank is used for the feeding pipe of discharge, the side wall fixed connection of work table's top one side near rotary tableting machine has the feeding pipe, the top fixed connection of feeding pipe has the guide plate, the side wall of work table is provided with the recovery mechanism for the rotary tableting machine production when the scattered medicine powder collection and re -compression. Compared with the prior art, the present application realizes the full -automatic closed loop of medicine powder collection, screening, conveying and reflux, avoids dust overflow and manual handling, improves medicine powder utilization, reduces material waste, and significantly improves production efficiency and environmental cleanliness.

Description

Technical Field

[0001] This utility model relates to the field of pharmaceutical powder recycling technology, and in particular to a tablet compression device for recycling tablet powder. Background Technology

[0002] With the development of the pharmaceutical industry, tablets, as a common dosage form of medicines, require efficient compression and utilization of drug powder during their production process. Therefore, rotary tableting machines are used. A rotary tableting machine is a device that compresses granular or powdered materials into tablets. It mainly consists of a feeding device, a turntable, a die system, a pressure mechanism, and a tablet ejection device. During operation, the material enters the die orifice through the feeder. As the turntable rotates continuously, the die, with the cooperation of upper and lower punches, fills, compresses, and ejects the material, thereby forming tablets with uniform shape and density. However, during the tablet compression process, a certain amount of drug powder often spills or is not fully compressed during feeding and ejection, scattering onto the pressing platen. To avoid drug powder waste and improve raw material utilization, a drug powder collection device is usually installed to collect the drug powder spilled during production for subsequent reuse. This drug powder collection method reduces production losses to a certain extent and ensures a clean production environment.

[0003] A Chinese patent has been published: a rotary tablet compression device, patent publication number: CN222875402U. This patent "includes a tablet press, a compression assembly, and a control panel, etc. The upper part of the tablet press is connected to the compression assembly, and the upper left side of the tablet press is connected to the control panel. Upon startup, a motor drives a rod to rotate, causing the sliding screen plate to move back and forth on the guide rod."

[0004] While this recycling device can sieve and collect the powder from tablets, preventing significant waste, the current method of powder recycling largely involves storing the collected powder in a storage box or container. Once a certain amount is collected, the container is manually removed, and the powder is poured into the feeding funnel of the tablet press for secondary compression. This method has significant shortcomings in practice. Firstly, it requires frequent handling by operators, increasing labor intensity and reducing production efficiency. Secondly, during the powder sieving process, the container for collecting the powder is open, causing powder to easily scatter and be wasted, affecting environmental cleanliness and potentially reducing drug utilization. Therefore, existing methods of powder recycling and reuse still suffer from time-consuming, labor-intensive, and inefficient practices, requiring further improvement. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a tablet powder recovery and tableting device to solve the problem that requires operators to frequently pick up, put in and pour out materials, which increases manual labor and reduces production efficiency.

[0006] To achieve the above objectives, this utility model provides a tablet powder recovery and tableting device, including a workbench. A rotary tablet press for compressing pharmaceutical powder into tablets is fixedly connected to the top of the workbench. A feeding tank for storing materials is fixedly connected to the side wall of the top of the workbench near the rotary tablet press. The bottom of the feeding tank is conical. A feeding pipe for discharging materials is fixedly connected to the bottom of the feeding tank. A discharge pipe is fixedly connected to one side of the top of the workbench near the side wall of the rotary tablet press. A guide plate is fixedly connected to the top of the discharge pipe. The guide plate is arc-shaped. A recovery mechanism is provided on the side wall of the workbench for collecting and re-compressing scattered pharmaceutical powder during production when rotating the tablet.

[0007] Preferably, the recovery mechanism for collecting and re-pressing scattered drug powder during rotary tablet press production includes a discharge plate fixedly connected to the bottom of the feeding pipe, the feeding pipe and the discharge plate being interconnected, the discharge plate being inclined, a filter steel mesh for filtering the fallen drug powder being fixedly connected to the bottom of the inner wall of the discharge plate, a material collection box being fixedly connected to the bottom of the discharge plate, the interior of the material collection box being interconnected with the inner wall of the discharge plate, the filter steel mesh being located between the discharge plate and the material collection box, a lifting cylinder being fixedly connected to the side wall of the worktable, an inlet pipe being connected to the bottom of the lifting cylinder, a return pipe being connected to the top of the lifting cylinder, one end of the return pipe extending above the top of the feeding tank, the inlet pipe being interconnected with the interior of the material collection box, a screw rod being rotatably connected between the inner walls of the lifting cylinder, a motor being fixedly connected to the top of the lifting cylinder, the output end of the motor passing through the inner wall of the lifting cylinder and fixedly connected to the shaft of the screw rod.

[0008] Preferably, a sorting plate for filtering defective tablets is fixedly connected to the inner wall of the discharge plate near the side wall of the filter steel mesh, and a feeding box is fixedly connected to the side wall of the workbench near the bottom of the sorting plate.

[0009] Preferably, a support plate is fixedly connected between the top of the inner wall of the feeding tank and the bottom of the support plate is rotatably connected to a stirring rod. The shaft of the stirring rod passes through the top of the support plate, and a belt is provided between the output end of the motor and the shaft of the stirring rod through a pulley.

[0010] Preferably, the inner wall of the discharge plate is fixedly connected with staggered guide plates at the top of both the filter steel mesh and the distribution plate, and the guide plates are inclined.

[0011] Preferably, a rubber strip for scraping off the powder is fixedly connected to the bottom of the guide plate.

[0012] Preferably, during the process of the motor driving the screw to rotate, it will drive the stirring rod to rotate via a belt, and the bottom end of the stirring rod extends to the bottom area of ​​the powder inside the feeding tank.

[0013] The beneficial effects of this utility model are: 1. This tablet powder recovery and tableting device guides the powder and tablets to fall onto an inclined discharge plate via an arc-shaped guide plate at the top of the feeding pipe. A filter steel mesh separates the powder from the intact tablets. Simultaneously, staggered guide plates on the inner wall of the discharge plate extend the sliding path of the tablets and shake off the attached powder, allowing it to enter the collection box for recovery. Subsequently, the powder is sealed and transported back to the feeding tank via the feeding pipe, the spiral rod inside the lifting cylinder, and the motor-driven return pipe. The entire process achieves a fully automated closed loop of powder collection, sieving, conveying, and return, avoiding dust spillage and manual handling, improving powder utilization, reducing material waste, and significantly improving production efficiency and environmental cleanliness.

[0014] 2. This tablet powder recovery and tableting device features a distribution plate on the inner wall of the discharge plate near the filter mesh. The plate's aperture is smaller than the tablet diameter, allowing uncompressed or broken tablet fragments to pass through the filter holes and fall into the discharge box for centralized collection. This facilitates subsequent grinding into powder and reuse by staff, preventing the fragments from mixing into the finished tablets and requiring manual sieving later. This effectively avoids waste of medicinal materials, improves raw material utilization, and ensures the economic efficiency and resource conservation of tableting production. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a three-dimensional side view of the overall structure of this utility model; Figure 3 This is a three-dimensional structural diagram of the discharge plate and guide plate of this utility model; Figure 4 This is a three-dimensional structural diagram of the lifting cylinder and screw rod of this utility model; Figure 5 This is a three-dimensional structural diagram of the material collection box and the material dispensing box of this utility model; Figure 6 This is a three-dimensional structural diagram of the feeding tank and stirring rod of this utility model.

[0017] The diagram is marked as follows: 1. Workbench; 2. Rotary tablet press; 3. Feeding tank; 4. Feeding pipe; 5. Discharging pipe; 6. Discharge plate; 7. Filter steel mesh; 8. Gathering box; 9. Lifting cylinder; 10. Feeding pipe; 11. Return pipe; 12. Screw rod; 13. Motor; 14. Guide plate; 15. Distributing plate; 16. Discharge box; 17. Support plate; 18. Stirring rod; 19. Belt; 20. Guide plate; 21. Rubber strip. Detailed Implementation

[0018] 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 specific embodiments.

[0019] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] like Figures 1 to 6 As shown, a tablet powder recovery and tableting device includes a workbench 1. A rotary tablet press 2 for compressing the powder into tablets is fixedly connected to the top of the workbench 1. The guide plate 14 is arc-shaped. A feeding tank 3 for storing materials is fixedly connected to the top of the workbench 1 near the side wall of the rotary tablet press 2. The bottom of the feeding tank 3 is conical. A feeding pipe 4 for discharging materials is fixedly connected to the bottom of the feeding tank 3. A discharge pipe 5 is fixedly connected to one side of the top of the workbench 1 near the side wall of the rotary tablet press 2. A guide plate 14 is fixedly connected to the top of the discharge pipe 5. The guide plate 14 is arc-shaped. A recovery mechanism for collecting and re-pressing the scattered powder during the production of the rotary tablet press 2 is provided on the side wall of the workbench 1.

[0021] Further, see attached document. Figures 1 to 6As shown, the recovery mechanism for collecting and re-pressing scattered drug powder during the production of the rotary tablet press 2 includes a discharge plate 6 fixedly connected to the bottom of the feed pipe 5. The feed pipe 5 and the discharge plate 6 are interconnected. The discharge plate 6 is inclined. A filter steel mesh 7 for drug powder falling during tablet feeding is fixedly connected to the bottom of the inner wall of the discharge plate 6. A material collection box 8 is fixedly connected to the bottom of the discharge plate 6. The interior of the material collection box 8 is interconnected with the inner wall of the discharge plate 6. The filter steel mesh 7 is located between the discharge plate 6 and the material collection box 8. Between them, a lifting cylinder 9 is fixedly connected to the side wall of the workbench 1. The bottom of the lifting cylinder 9 is connected to the feed pipe 10, and the top of the lifting cylinder 9 is connected to the return pipe 11. One end of the return pipe 11 extends to the top of the feed tank 3. The feed pipe 10 and the inside of the material box 8 are interconnected. A screw rod 12 is rotatably connected between the inner walls of the lifting cylinder 9. A motor 13 is fixedly connected to the top of the lifting cylinder 9. The output end of the motor 13 passes through the inner wall of the lifting cylinder 9 and is fixedly connected to the shaft of the screw rod 12. When the rotary tablet press 2 is running on top of the worktable 1, the powder and tablets are first guided into the feed pipe 5 by the arc-shaped guide plate 14 set at the top of the feed pipe 5. This guide plate 14 scrapes and guides the powder as it falls, preventing it from accumulating or scattering. After entering the feed pipe 5, the powder and tablets fall together onto the inclined discharge plate 6. A filter steel mesh 7 is fixedly connected to the bottom of the inner wall of the discharge plate 6. The powder can pass through the filter holes and fall into the collection box 8. The mesh size of the filter steel mesh 7 is... Tablets smaller than the minimum outer diameter of the tablet and larger than the particle size of the powder, whether whole or broken, remain above the filter steel mesh 7. Because the discharge plate 6 itself has an inclined angle, the remaining tablets will slide along the inclined surface. During the sliding process, they will continuously slide and be guided by the side walls of the guide plates 20 arranged in an alternating manner on the inner wall of the discharge plate 6. Through this multi-point contact method, not only is the sliding path of the tablet extended, but the residual powder adhering to the outer wall of the tablet can also be effectively shaken off, allowing it to enter the collection box 8, further improving the powder collection rate. Meanwhile, the collected powder naturally slides down to the bottom of the lifting cylinder 9 through the connection between the collection box 8 and the feed pipe 10. A spiral rod 12 is rotatably connected to the inner wall of the lifting cylinder 9, and is driven by a motor 13 at the top. When the motor 13 starts, the spiral rod 12 rotates, causing the powder to be conveyed upwards along the lifting cylinder 9. Finally, it is conveyed back to the feeding tank 3 through the return pipe 11 connected at the top, where it is mixed with the original material under the stirring action of the stirring rod 18 and participates in the tableting operation again. The entire recycling and lifting conveying process is a sealed structure, avoiding the problem of dust scattering caused by wind or manual handling, thus ensuring environmental cleanliness and powder utilization. In addition, the inner wall of the discharge plate 6 is close to the filter steel mesh 7. A distribution plate 15 is also fixed, with holes smaller than the tablet diameter. If the tablet is not compacted during production or breaks into granular tablets during rolling, the granular tablets will fall through the filter holes into the feeding box 16 located on the side wall of the workbench 1 for centralized collection. This facilitates subsequent grinding into powder and recycling by the staff, thereby further reducing material waste. At the same time, the collection box 8, the lifting cylinder 9, and the feed pipe 10 are detachably sealed, which facilitates cleaning and replacement of the filter steel mesh 7. In summary, this recycling mechanism realizes a fully automated closed-loop process of powder collection, screening, conveying and return, reducing manual operation, improving production efficiency, and effectively avoiding powder loss and environmental pollution.

[0022] Further, see attached document. Figure 4 As shown, a sorting plate 15 for filtering defective tablets is fixedly connected to the inner wall of the discharge plate 6 near the side wall of the filter steel mesh 7, and a feeding box 16 is fixedly connected to the side wall of the workbench 1 near the bottom of the sorting plate 15. It can effectively separate broken or defective tablets during the rolling process and collect them into the feeding box 16, which is convenient for subsequent grinding into powder for reuse, thereby further improving the utilization rate of medicinal materials and ensuring the quality of finished tablets.

[0023] Further, see attached document. Figure 6 As shown, a support plate 17 is fixedly connected between the top of the inner wall of the feeding tank 3 and the bottom of the support plate 17 is rotatably connected to a stirring rod 18. The shaft of the stirring rod 18 passes through the top of the support plate 17. A belt 19 is sleeved between the output end of the motor 13 and the shaft of the stirring rod 18 through a pulley. The pulley is divided into a driving pulley and a driven pulley. The output end of the motor 13 is fixedly installed with the driving pulley, and the shaft of the stirring rod 18 is installed with the driven pulley. The two are connected to each other through the belt 19, and the driving pulley and the driven pulley realize the linkage transmission of the stirring rod 18. This can fully mix the recovered drug powder with the raw materials when it re-enters the feeding tank 3, avoid drug powder deposition or agglomeration, ensure that the drug powder is evenly distributed when it is compressed again, and improve the tableting quality and stability.

[0024] Further, see attached document. Figure 4 As shown, the inner wall of the discharge plate 6 is fixedly connected to the top of the filter steel mesh 7 and the distribution plate 15 with staggered guide plates 20. The guide plates 20 are set at an inclination. This can increase the sliding path during the rolling of the tablets, so that the residual powder on the surface of the tablets can be fully shaken off and enter the recycling channel, thereby further improving the recovery rate of the powder and avoiding the powder residue on the surface of the tablets from affecting the appearance quality.

[0025] Further, see attached document. Figure 3 As shown, a rubber strip 21 for scraping off drug powder is fixedly connected to the bottom of the guide plate 14; it can scrape off the drug powder on the surface of the tablets and drug powder in the tablet press to prevent drug powder waste, and at the same time, it can smoothly guide the drug powder into the feed pipe 5 to improve the integrity of drug powder collection and recycling efficiency.

[0026] Further, see attached document. Figure 6 As shown, during the rotation of the screw rod 12 driven by the motor 13, the stirring rod 18 will be driven to rotate via the belt 19. The bottom end of the stirring rod 18 extends to the bottom area of ​​the powder inside the feeding tank 3. By driving the screw rod 12 to rotate through the motor 13, and simultaneously using the belt 19 to link the stirring rod 18, the stirring rod 18 rotates in the bottom area inside the feeding tank 3, which can stir the powder at the bottom of the tank and prevent the powder from clogging and failing to discharge.

[0027] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0028] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tablet powder recovery and tableting device, comprising a workbench (1), wherein a rotary tablet press (2) for compressing powder into tablets is fixedly connected to the top of the workbench (1), characterized in that: The top of the workbench (1) is fixedly connected to the side wall of the rotary tablet press (2) for storing materials. The bottom of the feeding tank (3) is conical. The bottom of the feeding tank (3) is fixedly connected to the feeding pipe (4) for discharging materials. The top side of the workbench (1) is fixedly connected to the side wall of the rotary tablet press (2). The top of the feeding pipe (5) is fixedly connected to the guide plate (14). The guide plate (14) is arc-shaped. The side wall of the workbench (1) is provided with a recycling mechanism for collecting and re-pressing the scattered powder during the production of the rotary tablet press (2).

2. The tablet powder recovery and tableting device according to claim 1, characterized in that, The recycling mechanism for collecting and re-pressing scattered drug powder during the production of the rotary tablet press (2) includes a discharge plate (6) fixedly connected to the bottom of the feed pipe (5). The feed pipe (5) and the discharge plate (6) are interconnected. The discharge plate (6) is inclined. A filter steel mesh (7) for filtering the fallen drug powder is fixedly connected to the bottom of the inner wall of the discharge plate (6). A material collection box (8) is fixedly connected to the bottom of the discharge plate (6). The interior of the material collection box (8) and the inner wall of the discharge plate (6) are interconnected. The filter steel mesh (7) is located between the discharge plate (6) and the material collection box (8). A lifting cylinder (9) is fixedly connected to the side wall of the workbench (1). The bottom of the lifting cylinder (9) is connected to a feed pipe (10), and the top of the lifting cylinder (9) is connected to a return pipe (11). One end of the return pipe (11) extends to the top of the feed tank (3). The feed pipe (10) and the inside of the material box (8) are interconnected. A screw rod (12) is rotatably connected between the inner walls of the lifting cylinder (9). A motor (13) is fixedly connected to the top of the lifting cylinder (9). The output end of the motor (13) passes through the inner wall of the lifting cylinder (9) and is fixedly connected to the shaft of the screw rod (12).

3. The tablet powder recovery and tableting device according to claim 2, characterized in that, The inner wall of the discharge plate (6) is fixedly connected to the side wall of the filter steel mesh (7) for filtering defective tablets, and the bottom of the workbench (1) is fixedly connected to the bottom of the side wall of the workbench (1) near the bottom of the distribution plate (15).

4. A tablet powder recovery and tableting device according to claim 3, characterized in that, A support plate (17) is fixedly connected between the top of the inner wall of the feeding tank (3). A stirring rod (18) is rotatably connected to the bottom of the support plate (17). The shaft of the stirring rod (18) passes through the top of the support plate (17). A belt (19) is provided between the output end of the motor (13) and the shaft of the stirring rod (18) through a pulley.

5. A tablet powder recovery and tableting device according to claim 2, characterized in that, The inner wall of the discharge plate (6) is fixedly connected with staggered guide plates (20) at the top of the filter steel mesh (7) and the distribution plate (15), and the guide plates (20) are inclined.

6. The tablet powder recovery and tableting device according to claim 1, characterized in that, The bottom of the guide plate (14) is fixedly connected to a rubber strip (21) for scraping off the powder.

7. A tablet powder recovery and tableting device according to claim 4, characterized in that, During the process of the motor (13) driving the screw (12) to rotate, the stirring rod (18) will be driven to rotate through the belt (19). The bottom end of the stirring rod (18) extends to the bottom area of ​​the powder inside the feeding tank (3).

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