Pharmaceutical tablet press

Abstract

The utility model relates to tablet press technical field, concretely relates to a pharmaceutical tablet press, including the cabinet, the side wall of cabinet is installed with the cabinet door through the hinge, the inner wall rotation of cabinet is connected with two belt pulleys, and the outer wall between two belt pulleys is equipped with the belt, and the outer wall fixed connection of cabinet has the motor, and the output fixed connection of motor is on the axle part of the belt pulley near motor side, the top fixed connection of cabinet has the discharge hopper, and the discharge end of discharge hopper penetrates the inside of cabinet and is on the top of belt, and the inside of cabinet near the top of belt is provided with the pressing mechanism. Compared with the prior art, the present application is more stable, the tablet hardness is higher, and it is not easy to break, at the same time, the cooperation of the mold cavity, the discharge plate and the spring makes the pressing and demolding process smooth and coherent, avoids the damage of the tablet due to incomplete demolding, and significantly improves the forming precision and yield of the tablet.

Description

Technical Field

[0001] This utility model relates to the field of tablet press technology, and in particular to a pharmaceutical tablet press. Background Technology

[0002] A pharmaceutical tablet compressor is a device that compresses drug granules or powders into tablets under pressure, and is widely used in the production of tablet pharmaceuticals. This equipment typically includes a feeding mechanism, a tableting mechanism, and a tablet ejection mechanism. Through upper and lower molds under high pressure, the drug powder is compacted, causing plastic deformation and intermolecular bonding between the powder particles, thereby forming a dense, intact tablet. Traditional tablet compressors mostly use a fixed mold cavity structure, forming tablets through a rotary table or intermittent pressing, resulting in stable tableting effects and a high tablet formation rate.

[0003] A Chinese patent has been published: a pharmaceutical tablet press, patent publication number: CN209888232U. The patent "includes a feeding device, a first conveyor belt with a die hole, a pressure plate located above the first conveyor belt, and a push plate located inside the first conveyor belt. After the feeding device feeds material into the die hole, the first conveyor belt rotates so that the die hole containing the material is located below the pressure plate. A first hydraulic cylinder pushes a pressure block into the die hole and squeezes the material. After the squeezing is completed, the pressure block leaves the die hole, and the first conveyor belt continues to rotate and moves the die hole filled with the squeezed material to below the push plate."

[0004] Although this tablet press can automatically remove the formed tablets without manual operation, saving time and effort, the pressing plate of the tablet press moves downwards via an electric telescopic rod to press the powder into the holes of the belt. However, in actual use, because the belt is a flexible structure, the downward pressure exerted by the pressing plate on the belt causes the belt to deform and dent in the pressing area. This prevents the powder from being fully compacted, resulting in insufficient forming density. Furthermore, this uneven force can cause the tablets to have a loose structure and insufficient hardness after forming, making them prone to cracking and breaking during demolding or conveying, thus affecting drug quality and production stability. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a pharmaceutical tablet press to solve the problem that existing presses exert a large downward pressure on the belt when the pressure plate applies downward pressure, causing the belt to dent and deform in the pressing area, making it impossible to fully compact the powder, resulting in insufficient molding density and a loose structure.

[0006] To achieve the above objectives, this utility model provides a pharmaceutical tablet press, comprising a cabinet, a cabinet door mounted on the side wall of the cabinet via hinges, two pulleys rotatably connected to the inner wall of the cabinet, a belt sleeved between the outer walls of the two pulleys, a motor fixedly connected to the outer wall of the cabinet, the output end of the motor fixedly connected to the shaft of the pulley near the motor, a feeding funnel fixedly connected to the top of the cabinet, the discharge end of the feeding funnel penetrating into the interior of the cabinet and positioned on top of the belt, a pad for supporting the belt during the pressing process fixedly connected to the inner wall of the cabinet, the pad being distributed on the top of the inner wall near the belt, and a pressing mechanism being provided inside the cabinet near the top of the belt; The inner wall of the cabinet is equipped with a cleaning mechanism at the bottom of the belt for cleaning up residual medicine powder on the belt surface.

[0007] Preferably, the pressing mechanism includes four sets of grooves formed on the outer wall of the belt. The internal shape of the grooves is convex. The inner walls of the four sets of grooves are slidably connected to mold cavities. An electric telescopic rod is fixedly connected to the top of the cabinet. A connecting plate is slidably connected to the inside of the cabinet. The connecting plate is concave. A pressure plate and a push plate are fixedly connected to both ends of the connecting plate, respectively. The telescopic end of the electric telescopic rod is fixedly connected to the top of the pressure plate. A plurality of equidistant and evenly distributed pressure blocks are fixedly connected to the bottom of the pressure plate. The outer walls of the pressure blocks are adapted to the inner walls of the mold cavities.

[0008] Preferably, the bottom of the pusher plate is fixedly connected with a plurality of pusher blocks that are evenly distributed at equal intervals, the inner wall of the groove is fixedly connected with a spring, the top of the spring is fixedly connected with a discharge plate, and the bottom of the inner wall of the groove is provided with a through groove, which is connected to the inner wall of the belt.

[0009] Preferably, the cleaning mechanism includes a toothed plate fixedly connected to the side wall of the connecting plate, a sweeping brush rotatably connected to the inner wall of the cabinet, the top of the sweeping brush being attached to the bottom of the belt, and a gear fixedly connected to the shaft of the sweeping brush, with the toothed plate and the gear meshing with each other.

[0010] Preferably, a screening screen is fixedly connected to the inner wall of the cabinet near the bottom of the belt, and the screening screen is set at an angle.

[0011] Preferably, two storage bins are placed on the inner wall of the cabinet near the bottom of the belt, and the two storage bins are used to collect tablets.

[0012] Preferably, the discharge funnel is funnel-shaped, and a rubber ring is fixedly connected to the discharge end of the discharge funnel, with the rubber ring fitting against the top of the belt.

[0013] The beneficial effects of this utility model are: 1. This pharmaceutical tablet compressor uses an electric telescopic rod to drive the pressure plate downwards, allowing multiple pressure blocks to simultaneously enter the mold cavity and uniformly compact the pharmaceutical powder. The convex structure of the groove limits the pressure space of the pharmaceutical powder, resulting in tablets with consistent thickness and density. The pads below the belt provide support during the pressing process, effectively dispersing the downward pressure and preventing the belt from denting or deforming in the pressure area. Compared with the problems of uneven powder compaction and insufficient tablet density caused by the flexible structure of the belt in the prior art, this structure makes the stress more stable, the tablets harder, and less prone to breakage. At the same time, the cooperation between the mold cavity, the unloading plate, and the springs makes the pressing and demolding process smooth and continuous, avoiding tablet breakage due to incomplete demolding, and significantly improving the tablet forming accuracy and yield.

[0014] 2. This pharmaceutical tablet compressor employs a mechanical transmission system using toothed plates and gears. The connecting plate, moving up and down, drives a brush to rotate synchronously, automatically removing residual powder from the bottom of the belt and the surface of the tablets. The brush maintains continuous contact with the belt surface during rotation, effectively preventing powder accumulation and adhesion, thus avoiding powder mixing that could affect drug quality. Simultaneously, an inclined screening screen automatically filters fallen tablets, separating powdered and broken tablets into a non-conforming storage bin, while conforming tablets slide into another bin, achieving efficient separation of finished product and residue. This cleaning mechanism requires no additional drive source, featuring a simple and reliable structure. It allows the pressing and cleaning processes to be completed simultaneously, maintaining stable equipment operation and high cleanliness, significantly improving production continuity and drug quality consistency. 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 schematic diagram of the internal structure of the cabinet of this utility model; Figure 3 This is a three-dimensional structural diagram of the belt and pad of this utility model; Figure 4 This utility model Figure 2 Enlarged structural diagram at point A in the middle; Figure 5 This is a three-dimensional structural diagram of the pressure plate and pusher plate of this utility model.

[0017] The diagram is marked as follows: 1. Cabinet body; 2. Cabinet door; 3. Pulley; 4. Belt; 5. Motor; 6. Discharge hopper; 7. Groove; 8. Mold cavity; 9. Electric telescopic rod; 10. Connecting plate; 11. Pressure plate; 12. Pusher plate; 13. Pressure block; 14. Pad plate; 15. Pusher block; 16. Spring; 17. Through groove; 18. Toothed plate; 19. Sweeping brush; 20. Gear; 21. Screening screen; 22. Storage box; 23. Rubber ring; 24. Unloading plate. 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 5 As shown, a pharmaceutical tablet press includes a cabinet 1, with a cabinet door 2 installed on the side wall of the cabinet 1 via hinges. The main function of the equipment is to drive the pressing mechanism through an electric telescopic rod 9 to complete the pressing of pharmaceutical powder, and to realize the unloading and cleaning of tablets in conjunction with a conveyor belt 4, a sweeping brush 19, and a pusher plate 12.

[0021] In this embodiment, before the equipment is run, the powder is evenly put into the discharge hopper 6. The discharge end of the discharge hopper 6 is in close contact with the upper surface of the belt 4. A rubber ring 23 is provided between the two. The rubber ring 23 can maintain a flexible fit when the belt 4 is running continuously, which plays a sealing role and prevents the powder from leaking out from the gap between the discharge port and the belt 4, so that the filling is more even. When the motor 5 starts, it drives the pulley 3 to rotate. The pulley 3 drives another pulley 3 to rotate synchronously through the externally sleeved belt 4, thereby realizing the cyclic conveying of the belt 4. The belt 4 is made of food-grade polyurethane material with a thickness of 1.5 cm. The outer wall of the belt 4 is evenly provided with several grooves 7. Each groove 7 has a mold cavity 8 slidably installed in it. As the belt 4 moves, the empty mold cavities 8 move to the bottom of the discharge funnel 6 in sequence. Under the action of gravity, the medicine powder is automatically filled into the cavity of the mold cavity 8, realizing continuous feeding and quantitative filling. The inside of the groove 7 adopts a convex design and is inverted, which helps to form a limiting support for the medicine powder through the discharge plate 24 in the subsequent pressing process. When the mold cavity 8 filled with powder moves directly below the pressure plate 11, the electric telescopic rod 9 is activated, driving the pressure plate 11 and its fixed connecting plate 10 and push plate 12 to move downward. Multiple pressure blocks 13 are provided below the pressure plate 11 at equal intervals. When the pressure blocks 13 press down, they match the upper opening of the mold cavity 8 to uniformly press the powder inside. The pressing force is transmitted to the surface of the belt 4 through the powder. To prevent the belt 4 from sinking under pressure, a pad 14 is specially provided below the belt 4 as a bearing base. The pad 14 can disperse the downward force from the pressing mechanism in the opposite direction, thereby ensuring the flatness and force balance of the belt 4, so that the tablets are formed with uniform density and consistent hardness. After pressing, the electric telescopic rod 9 drives the pressure plate 11 and connecting plate 10 to rise, the pressure plate 11 returns to its original position, and the belt 4 continues to move, driving the pressed tablets away from the pressing area and into the bottom of the pusher plate 12. When the tablets move below the pusher plate 12, the electric telescopic rod 9 drives the connecting plate 10 to descend again. The pusher block 15 below the pusher plate 12 extends into the groove 7 through the through groove 17 at the bottom of the belt 4, pushing the unloading plate 24 located at the bottom. Since a spring 16 is installed between the unloading plate 24 and the groove 7, the squeezing force of the pusher block 15 causes the unloading plate 24 to slide along the wall of the groove 7 and stretch the spring 16, forming a short-term elastic energy storage. When the unloading plate 24 moves upward, it will push out the tablets in the mold cavity 8 as a whole, realizing automatic demolding. After the tablets are completely removed from the groove 7, the rebound force of the spring 16 makes the unloading plate 24 return to its initial position, preparing for the next round of filling and pressing. This process does not require manual intervention, the pressing and tablet ejection rhythm is coordinated, and the production efficiency is high.

[0022] After the tablets are demolded, they fall directly onto the screening screen 21 located below the belt conveyor 4. The screening screen 21 is installed at an angle of 25° to 30°. Its surface has a uniformly distributed perforated structure with a hole diameter of 2 mm. During the sliding process, the fine powder and broken fragments attached to the surface of the tablets can fall through the screen holes into the unqualified storage bin 22 below, while the intact tablets slide into the storage bin 22 on the other side along the inclined direction of the screen. This achieves automatic separation and collection of tablets and powder. The two storage bins 22 are used to recover powder and qualified tablets respectively, ensuring orderly material management. During the tableting cycle, the cleaning mechanism and the pressing mechanism are linked. The side wall of the connecting plate 10 is fixed with a toothed plate 18. The cleaning brush 19 inside the cabinet 1 is installed through a rotating shaft, and a gear 20 is fixed at the end of the shaft. When the connecting plate 10 moves up and down, the toothed plate 18 and the gear 20 mesh and drive each other, so that the gear 20 drives the cleaning brush 19 to rotate. The top of the cleaning brush 19 is in contact with the bottom surface of the belt 4. When rotating, the bristles form frictional contact with the surface of the belt 4, which can remove the powder and residue adhering to the lower surface of the belt 4 in time. The powder will fall into the storage box 22. This mechanical meshing drive design does not require an additional power source and realizes the automatic synchronous cleaning of the belt 4 in each pressing cycle. Through the coordination of the above structures, the pharmaceutical tablet press completes a continuous automated process from feeding, pressing, demolding to screening and cleaning. The pad 14 in the pressing mechanism effectively distributes the pressing load, keeps the belt 4 under uniform force, and avoids denting and deformation. The cleaning mechanism achieves automatic powder removal from the surface of the belt 4 through the linkage of the toothed plate 18 and the sweeping brush 19. With the inclined screening structure of the screening screen 21, the tablets and powder are automatically separated and classified for collection, which improves the overall precision of drug forming and production efficiency.

[0023] 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.

[0024] 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 pharmaceutical tablet press, comprising a cabinet (1), wherein a cabinet door (2) is installed on the side wall of the cabinet (1) via hinges, characterized in that: The inner wall of the cabinet (1) is rotatably connected to two pulleys (3), and a belt (4) is sleeved between the outer walls of the two pulleys (3). The outer wall of the cabinet (1) is fixedly connected to a motor (5), and the output end of the motor (5) is fixedly connected to the shaft of the pulley (3) on the side near the motor (5). The top of the cabinet (1) is fixedly connected to a feeding funnel (6), and the discharge end of the feeding funnel (6) passes into the interior of the cabinet (1) and is located on the top of the belt (4). The inner wall of the cabinet (1) is fixedly connected to a pad (14) for supporting the belt (4) during the pressing process. The pad (14) is distributed on the top of the inner wall near the belt (4). The inside of the cabinet (1) is provided with a pressing mechanism near the top of the belt (4). The inner wall of the cabinet (1) is provided with a cleaning mechanism at the bottom of the belt (4) for cleaning the powder residue on the surface of the belt (4).

2. The pharmaceutical tablet compressor according to claim 1, characterized in that, The pressing mechanism includes four sets of grooves (7) on the outer wall of the belt (4). The inner shape of the grooves (7) is convex. The inner walls of the four sets of grooves (7) are slidably connected to mold cavities (8). The top of the cabinet (1) is fixedly connected to an electric telescopic rod (9). The inside of the cabinet (1) is slidably connected to a connecting plate (10). The connecting plate (10) is concave. The two ends of the connecting plate (10) are fixedly connected to a pressure plate (11) and a pusher plate (12). The telescopic end of the electric telescopic rod (9) is fixedly connected to the top of the pressure plate (11). The bottom of the pressure plate (11) is fixedly connected to multiple equidistant and evenly distributed pressure blocks (13). The outer wall of the pressure block (13) is adapted to the inner wall of the mold cavity (8).

3. A pharmaceutical tablet compressor according to claim 2, characterized in that, The bottom of the pusher plate (12) is fixedly connected to a plurality of pusher blocks (15) evenly distributed at equal intervals. The inner wall of the groove (7) is fixedly connected to a spring (16). The top of the spring (16) is fixedly connected to a discharge plate (24). The bottom of the inner wall of the groove (7) is provided with a through groove (17). The through groove (17) is connected to the inner wall of the belt (4).

4. A pharmaceutical tablet compressor according to claim 2, characterized in that, The cleaning mechanism includes a toothed plate (18) fixedly connected to the side wall of the connecting plate (10), a sweeping brush (19) rotatably connected to the inner wall of the cabinet (1), the top of the sweeping brush (19) is attached to the bottom of the belt (4), and a gear (20) is fixedly connected to the shaft of the sweeping brush (19). The toothed plate (18) and the gear (20) mesh with each other.

5. A pharmaceutical tablet compressor according to claim 1, characterized in that, A screening screen (21) is fixedly connected to the inner wall of the cabinet (1) near the bottom of the belt (4), and the screening screen (21) is set at an angle.

6. A pharmaceutical tablet compressor according to claim 1, characterized in that, Two storage bins (22) are placed on the inner wall of the cabinet (1) near the bottom of the belt (4). The two storage bins (22) are used to collect tablets.

7. A pharmaceutical tablet compressor according to claim 1, characterized in that, The material discharge funnel (6) is funnel-shaped, and a rubber ring (23) is fixedly connected to the discharge end of the material discharge funnel (6). The rubber ring (23) is in contact with the top of the belt (4).

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