A double-hopper precise filling structure for western medicine double-layer tablet production

Abstract

The utility model provides a western medicine double -layer tablet production is with double hopper precision filling structure, belongs to production technical field, including first workstation, the surface of first workstation is installed with filling structure, and filling structure is used for filling to double -layer tablet, filling structure includes hopper, hopper fixedly arranged in the surface of first workstation, hopper sets up two, two hoppers are provided with the discharge gate, through the setting of filling structure, the transmission design of servo motor plus different number of teeth driven gear, through the transmission ratio of adjusting gear and pulley, can control the rotating speed of two hoppers inner impeller respectively, combine the accurate calculation of volume of impeller upper feed inlet, can realize independent, accurate quantitative feeding according to the filling amount demand (such as the upper layer and lower layer weight ratio of double -layer tablet) of two raw materials, makes two layers raw material weight deviation control in very small range, accords with the strict standard of tablet weight difference of pharmaceutical industry, ensures the medicine dose accurate.

Description

Technical Field

[0001] This utility model relates to the field of production technology, and in particular to a double-hopper precision filling structure for the production of double-layer tablets of Western medicine. Background Technology

[0002] In the pharmaceutical formulation manufacturing field, bilayer tablets, as a special dosage form, offer advantages such as separating different drug components, controlling the drug release sequence (e.g., combining immediate-release and sustained-release layers), masking unpleasant drug odors, or improving taste, leading to their increasingly widespread use in clinical treatment. However, the manufacturing process of bilayer tablets is more complex than that of ordinary single-layer tablets. One of the core challenges lies in achieving precise quantitative filling of two different raw materials while ensuring that the two layers do not mix during filling and are uniformly separated, while simultaneously meeting the efficiency requirements of continuous production. This places extremely high demands on the structural design and performance of the filling equipment. Currently available bilayer tablet filling equipment still has the following shortcomings in practical applications: the raw materials of Western medicine are hygroscopic and prone to clumping due to moisture during storage and transportation. Traditional hoppers lack effective anti-clogging mechanisms, and clumped raw materials can block the discharge port, causing feeding interruptions. This not only reduces production efficiency but also requires manual shutdown for cleaning, increasing production costs and raw material losses. Furthermore, incomplete cleaning may introduce the risk of cross-contamination. Therefore, this application provides a dual-hopper precision filling structure for the production of bilayer tablets of Western medicine to meet these requirements. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a double-hopper precision filling structure for the production of double-layer tablets of Western medicine, so as to solve the problem that traditional hoppers lack an effective anti-clogging mechanism, and the clumping of raw materials will block the discharge port, causing the feeding to be interrupted, which not only reduces production efficiency, but also requires manual shutdown for cleaning, increasing production costs and raw material loss.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A double-hopper precision filling structure for the production of double-layer tablets of Western medicine includes a first workbench, on the surface of which a filling structure is installed for filling double-layer tablets. The filling structure includes hoppers, which are fixedly mounted on the surface of the first worktable. There are two hoppers, each with a discharge port. A first rotating rod is rotatably mounted on the inner wall of the discharge port, and an impeller is fixedly mounted on the outer wall of the first rotating rod. The impeller has several feed ports and rotates in contact with the inner wall of the discharge port. A discharge port is fixedly mounted on the inner wall of the first worktable. A discharge plate is fixedly mounted on the side of the hopper near the discharge port and is connected to the inner wall of the discharge port. A driven gear is fixedly mounted at the front end of one of the first rotating rods, and a driven pulley is fixedly mounted at the front end of the other first rotating rod. A support plate is fixedly mounted on the first workbench, and a first motor is fixedly mounted on the support plate. A second rotating rod is rotatably mounted on the support plate, and a driving gear and a driving pulley are fixedly mounted on the second rotating rod. The driving gear meshes with two driven gears, and the driving pulley is connected to the driven pulleys via a belt. The second rotating rod is fixed to the output end of the first motor. A second workbench is fixedly mounted directly below the first workbench, and a turntable is rotatably mounted on the second workbench. Several material troughs are opened on the turntable, and the discharge port corresponds to one of the material troughs. An electric push rod is fixedly mounted on the first workbench, and an extrusion plate is fixedly mounted on the extended end of the electric push rod.

[0005] Preferably, a third rotating rod is rotatably provided on the inner wall of the hopper, a shaking plate is fixedly provided on the outer wall of the third rotating rod, a rotating bar is also fixedly provided on the outer wall of the third rotating rod, a spring is fixedly provided on the outer wall of the hopper, one end of the spring is fixed to the rotating bar, and a paddle is fixedly provided on the outer wall of the first rotating rod.

[0006] Preferably, there are two driven gears, one of which is smaller than the other.

[0007] Preferably, the paddles are all arc-shaped on the side near the rotating bar.

[0008] Preferably, a second motor is fixedly installed on the inner wall of the second worktable, and a rotating shaft is fixedly installed at the output end of the second motor. The rotating shaft is fixed to the turntable and passes through the turntable to be rotatably connected to the first worktable.

[0009] Compared with the prior art, this utility model has at least the following beneficial effects: In the above solution, by setting the filling structure and using a servo motor with driven gears of different numbers of teeth, the rotational speed of the impellers in the two hoppers can be controlled separately by adjusting the transmission ratio of the gears and pulleys. Combined with the feed inlet with precise volume calculation on the impeller, independent and precise quantitative feeding can be achieved according to the filling requirements of the two raw materials (such as the weight ratio of the upper and lower layers of a double-layer tablet). This keeps the weight deviation of the two layers of raw materials within a very small range, meets the strict standards of the pharmaceutical industry for tablet weight differences, and ensures accurate drug dosage.

[0010] The hopper is equipped with an interconnected anti-blocking mechanism consisting of a paddle, a rotating bar, a shaking plate, and a spring. When the first rotating rod rotates, the paddle intermittently moves the rotating bar, causing the shaking plate to scrape and shake the inner wall of the hopper repeatedly. This effectively breaks up raw material agglomerates and removes raw materials adhering to the inner wall of the hopper, promoting smooth material descent. The elastic restoring effect of the spring ensures that the shaking plate operates continuously and stably, fundamentally solving the problem of raw material clogging the outlet, avoiding production interruptions, improving equipment operating efficiency, and reducing manual cleaning costs and the risk of cross-contamination. Attached Figure Description

[0011] The accompanying drawings, which form part of this specification, illustrate embodiments of the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable those skilled in the art to implement and use the present disclosure.

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the driven gear, the first motor, and the support plate of this utility model; Figure 3 This is a schematic diagram of the first workbench, the second workbench, and the hopper of this utility model; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the hopper, third rotating rod, and shaking plate of this utility model; Figure 6 for Figure 5 Enlarged view of section B in the middle.

[0013] Figure Labels

[0014] 1. First worktable; 2. Hopper; 3. Discharge port; 4. First rotating rod; 5. Impeller; 6. Feed inlet; 7. Discharge port; 8. Discharge plate; 9. Driven gear; 10. Support plate; 11. First motor; 12. Second rotating rod; 13. Drive gear; 14. Second worktable; 15. Turntable; 16. Material trough; 17. Electric push rod; 18. Extrusion plate; 19. Third rotating rod; 20. Shaking plate; 21. Rotating bar; 22. Spring; 23. Paddle; 24. Second motor; 25. Rotating shaft; 26. Driven pulley; 27. Drive pulley; 28. Belt.

[0015] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to the specific structure, device and environment. According to specific needs, those skilled in the art can adjust or modify these devices and environments, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0016] The following is a detailed description of a double-hopper precision filling structure for the production of double-layer tablets of Western medicine provided by this utility model, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this utility model.

[0017] like Figures 1-6 As shown, an embodiment of this utility model provides a double-hopper precision filling structure for the production of double-layer tablets of Western medicine, including a first workbench 1. The first workbench 1 serves as the basic support component of the entire filling structure and is made of high-strength stainless steel, possessing good load-bearing capacity and corrosion resistance, and can effectively bear the weight of the filling structure and related components. The surface of the first workbench 1 is equipped with a filling structure, which is used to fill double-layer tablets.

[0018] Specifically, the filling structure is the core component for achieving precise raw material filling. It consists of a hopper 2, a first rotating rod 4, an impeller 5, a feeding plate 8, a driven gear 9, a driven pulley 26, a support plate 10, a first motor 11, a second rotating rod 12, a driving gear 13, a driving pulley 27, a belt 28, an electric push rod 17, and an extrusion plate 18. The hopper 2, serving as the raw material storage and initial conveying component, is fixedly installed on the surface of the first workbench 1. Two hoppers are provided, one for storing the two different raw materials for double-layer tablets. The hopper 2 is made of transparent food-grade polycarbonate material, allowing operators to easily observe the remaining raw material level and replenish it promptly. A discharge port 3 is located at the bottom of the hopper 2. The size of the discharge port 3 is precisely designed according to the size of the raw material particles and the filling amount to ensure a stable and uniform flow of raw material. The first rotating rod 4 is rotatably mounted on the inner wall of the discharge port 3. Its two ends are connected to the side wall of the discharge port 3 via high-precision bearings, ensuring smooth and stable rotation. The impeller 5 is fixedly mounted on the outer wall of the first rotating rod 4, rotating in close contact with the inner wall of the discharge port 3. The gap between the two is controlled within the range of 0.1-0.2mm to effectively prevent raw material leakage. Several feed inlets 6 are provided on the impeller 5. The volume of each feed inlet 6 is precisely calculated to match the amount of raw material required for each filling, achieving quantitative filling. Furthermore, the feed inlets 6 on both sides of the impeller 5 are staggered at an angle, allowing the impellers on both sides to feed material sequentially, completing the two-layer tableting effect.

[0019] The feeding plate 8 is fixedly installed on the side of the hopper 2 near the discharge port 3. One end of it is connected to the discharge port 3 of the hopper 2, and the other end is connected to the feeding port 7 opened on the inner wall of the first workbench 1, forming a channel for material transportation. The feeding plate 8 adopts an inclined design with an inclination angle of 30-45° and the surface is polished to reduce the friction of the material during transportation and avoid material residue blockage. The position of the feeding port 7 corresponds to the material trough 16 on the turntable 15 below, ensuring that the material can fall accurately into the material trough 16. A support plate 10 is fixedly mounted on the first workbench 1, providing stable support for the first motor 11 and the second rotating rod 12. The first motor 11 is a servo motor, and its output end is fixedly connected to the second rotating rod 12, which can drive the second rotating rod 12 to rotate. The second rotating rod 12 is rotatably mounted on the support plate 10. A drive gear 13 and a drive pulley 27 are fixedly mounted on the outer wall. The drive gear 13 meshes with two driven gears 9. The drive pulley 27 is connected to the driven pulley 26 via a belt 28. The driven gears 9 and the driven pulley 26 are respectively fixed to the outer sides of the two first rotating rods 4. The wall, through gear transmission and belt 28 transmission, drives two of the first rotating rods 4 to rotate, which in turn drives the impeller 5 to rotate to realize the material conveying. The two driven gears 9 and the driving pulley 27 and driven pulley 26 are of different sizes. By adjusting the transmission ratio, the different speeds of the impellers 5 in the two hoppers 2 can be realized to meet the different filling amounts of the two raw materials of the double-layer tablets. The gear and pulley transmissions are set to keep the impellers 5 on both sides moving synchronously in opposite directions. Other transmission methods can also be used, such as pure gear connection, as long as it can realize reverse transmission on both sides and the transmission ratio can be adjusted. The electric push rod 17 is fixedly mounted on the first worktable 1, and its extended end is fixedly connected to the extrusion plate 18. The electric push rod 17 adopts a high-precision linear drive method, which has the characteristics of precise and controllable stroke and stable thrust. The extrusion plate 18 is made of food-grade stainless steel with a smooth and flat surface, which is compatible with the size of the material trough 16 on the turntable 15. When the raw material is filled into the material trough 16, the electric push rod 17 can push the extrusion plate 18 to move downward, and perform preliminary compaction of the raw material in the material trough 16, laying the foundation for the subsequent tablet pressing process. The second workbench 14 is fixedly located directly below the first workbench 1 and is vertically aligned with the first workbench 1. It is also made of high-strength stainless steel and provides support for the turntable 15 and the drive components. The inner wall of the workbench is fixedly provided with a mounting base for the second motor 24 to ensure the stability of the second motor 24 installation.

[0020] The turntable 15 is rotatably mounted on the second worktable 14. Several material troughs 16 are provided on the turntable 15, and the size of the material troughs 16 matches the final size of the double-layer tablets to ensure that the raw materials can be accurately filled and well formed during subsequent pressing.

[0021] The second motor 24 is fixedly mounted on the inner wall of the second worktable 14. It is a stepper motor, characterized by precise positioning and smooth start-stop. A rotating shaft 25 is fixedly mounted on the output end of the second motor 24. One end of the shaft 25 is fixedly connected to the turntable 15, and the other end passes through the turntable 15 and is rotatably connected to the first worktable 1 via bearings, forming a stable double-support structure to ensure the coaxiality and stability of the turntable 15 during rotation. Driven by the second motor 24, the turntable 15 can be rotated intermittently, causing the material trough 16 to align sequentially with the discharge port 7, achieving continuous filling. To prevent the raw materials in hopper 2 from becoming clogged due to moisture or agglomeration, thus affecting the filling efficiency, a third rotating rod 19 is rotatably installed on the inner wall of hopper 2. A shaking plate 20 is fixedly installed on the outer wall of the third rotating rod 19. The shaking plate 20 has an arc-shaped structure and fits against the inner wall of hopper 2. During rotation, it can scrape and shake the raw materials on the inner wall of hopper 2, breaking up agglomerates and promoting the falling of raw materials. A rotating bar 21 is also fixedly installed on the outer wall of the third rotating rod 19, and a spring 22 is fixedly installed on the outer wall of hopper 2. One end is fixedly connected to the rotating bar 21 to form an elastic reset structure. At the same time, a paddle 23 is fixedly installed on the outer wall of the first rotating rod 4. The paddle 23 is arc-shaped on the side near the rotating bar 21. During the rotation of the first rotating rod 4, the rotating bar 21 can be intermittently paddled, which drives the third rotating rod 19 to rotate, thereby causing the shaking plate 20 to move. After the paddle 23 disengages from the rotating bar 21, the rotating bar 21 is reset by the elastic tension of the spring 22, realizing the reciprocating shaking of the shaking plate 20, further improving the anti-blocking effect.

[0022] Working principle: The operator adds the two different raw materials for double-layer tablets into two hoppers 2 respectively, and observes the remaining raw material through the transparent hopper 2 to ensure that the raw material is sufficient. At the same time, according to production needs, the operator sets the rotation speed of the first motor 11 (by adjusting the motor parameters, using the transmission ratio of the driving gear 13 and the driven gear 9, and the transmission ratio of the driving pulley 27 and the driven pulley 26, the rotation speed of the impeller 5 in the two hoppers 2 is controlled to achieve precise control of the different filling amounts of the two raw materials), the rotation angle and interval of the second motor 24 (controlling the intermittent rotation speed of the turntable 15 so that the material trough 16 is aligned with the feeding port 7 in sequence, matching the filling speed and the rhythm of subsequent processes), and the extension length and pressure of the electric push rod 17 (ensuring that the compaction degree of the raw material by the extrusion tablet 18 meets the subsequent pressing requirements). The second motor 24 is started, which drives the rotating shaft 25 to rotate, thereby driving the turntable 15 to rotate. When one of the material troughs 16 rotates to be aligned with the discharge port 7 of the first worktable 1, the second motor 24 stops rotating, and the turntable 15 is stationary, waiting for the raw material to be filled. The first motor 11 is started, which drives the second rotating rod 12 to rotate. The driving gear 13 and driving pulley 27 on the second rotating rod 12 rotate synchronously. Through gear meshing, the driven gear 9 rotates, and through belt 28, the driven pulley 26 rotates. This causes the two first rotating rods 4 to drive the corresponding impellers 5 to rotate in the discharge port 3 of the hopper 2. When the feed port 6 on the impeller 5 rotates to connect with the inside of the hopper 2, the raw material in the hopper 2 falls into the feed port 6 under the action of gravity, realizing quantitative receiving of raw materials. As the impeller 5 continues to rotate, when the feed port 6 containing raw materials rotates to connect with the discharge plate 8, the raw material slides through the discharge plate 8 into the discharge port 7 under the action of gravity, and finally falls precisely into the material trough 16 aligned with the lower turntable 15. Because the transmission ratios of the two gears and the two pulleys are different, the two impellers 5 rotate at different speeds, which can realize that the two raw materials are filled into the same material trough 16 at the same time according to the set ratio, completing the initial filling of the bottom and top layers of double-layer tablets. During the rotation of the first rotating rod 4, the paddle 23 on its outer wall rotates synchronously. When the paddle 23 rotates to contact the rotating bar 21 on the third rotating rod 19, it pushes the rotating bar 21 to rotate around the axis of the third rotating rod 19, thereby driving the shaking plate 20 to rotate inside the hopper 2, scraping and shaking the raw material on the inner wall of the hopper 2 to prevent the raw material from clumping and blocking. When the paddle 23 continues to rotate and disengages from the rotating bar 21, under the elastic tension of the spring 22, the rotating bar 21 drives the third rotating rod 19 and the shaking plate 20 to reset. This process is repeated to achieve intermittent shaking of the shaking plate 20, continuously ensuring the smooth falling of the raw material. After one layer of raw material is filled into the material trough 16, the electric push rod 17 is activated, and its extended end pushes the extrusion plate 18 downward. The extrusion plate 18 extends into the material trough 16 to initially compact the raw material, eliminate gaps between the raw materials, and make the raw material evenly and densely distributed in the material trough 16, which ensures the molding quality during subsequent tablet compression. After compaction is completed, the electric push rod 17 drives the extrusion plate 18 to reset, waiting for the next layer of tablets to be extruded. Subsequently, the second motor 24 starts again, driving the turntable 15 to rotate at a certain angle, so that the next empty material trough 16 rotates to align with the feeding port 7. At the same time, the material trough 16 that has been filled and compacted rotates to the next process position (such as the tablet pressing process), repeating the above process of quantitative material feeding, anti-blocking assistance, and material compaction, so as to achieve continuous and precise filling of double-layer tablet raw materials. This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details have been described in detail in the above preferred embodiments; however, those skilled in the art can fully understand this utility model even without these detailed descriptions.

[0023] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A double-hopper precision filling structure for the production of double-layer tablets of Western medicine, comprising a first workbench (1), characterized in that, The surface of the first workbench (1) is equipped with a filling structure for filling double-layer tablets; The filling structure includes a hopper (2), which is fixedly installed on the surface of the first workbench (1). There are two hoppers (2), and each hopper (2) has a discharge port (3). The inner wall of the discharge port (3) is rotatably equipped with a first rotating rod (4). The outer wall of the first rotating rod (4) is fixedly equipped with an impeller (5). The impeller (5) has several feed ports (6). The impeller (5) rotates and fits against the inner wall of the discharge port (3). The inner wall of the first workbench (1) is fixedly equipped with a discharge port (7). The side of the hopper (2) near the discharge port (3) is fixedly equipped with a discharge plate (8). The discharge plate (8) is connected to the inner wall of the discharge port (7). The front end of one of the first rotating rods (4) is fixedly equipped with a driven gear (9), and the front end of the other first rotating rod (4) is fixedly equipped with a driven pulley (26). A support plate (10) is fixedly installed on the first workbench (1). A first motor (11) is fixedly installed on the support plate (10). A second rotating rod (12) is rotatably installed on the support plate (10). A driving gear (13) and a driving pulley (27) are fixedly installed on the second rotating rod (12). The driving gear (13) meshes with two driven gears (9). The driving pulley (27) is connected to the driven pulley (26) via a belt (28). The second rotating rod (12) is fixed to the output end of the first motor (11). A second workbench (14) is fixedly installed directly below the first workbench (1). A turntable (15) is rotatably installed on the second workbench (14). Several material troughs (16) are opened on the turntable (15). The discharge port (7) corresponds to one of the material troughs (16). An electric push rod (17) is fixedly installed on the first workbench (1). An extrusion plate (18) is fixedly installed at the extended end of the electric push rod (17).

2. The double-hopper precision filling structure for producing double-layer tablets of Western medicine according to claim 1, characterized in that, The inner wall of the hopper (2) is rotatably provided with a third rotating rod (19), the outer wall of the third rotating rod (19) is fixedly provided with a shaking plate (20), the outer wall of the third rotating rod (19) is also fixedly provided with a rotating bar (21), the outer wall of the hopper (2) is fixedly provided with a spring (22), one end of the spring (22) is fixed to the rotating bar (21), and the outer wall of the first rotating rod (4) is fixedly provided with a paddle (23).

3. The double-hopper precision filling structure for producing double-layer tablets of Western medicine according to claim 1, characterized in that, There are two driven gears (9), one of which is smaller than the other.

4. The double-hopper precision filling structure for producing double-layer tablets of Western medicine according to claim 2, characterized in that, The paddle (23) is arc-shaped on the side near the rotating bar (21).

5. The double-hopper precision filling structure for producing double-layer tablets of Western medicine according to claim 1, characterized in that, The inner wall of the second workbench (14) is fixedly provided with a second motor (24), and the output end of the second motor (24) is fixedly provided with a rotating shaft (25). The rotating shaft (25) is fixed to the turntable (15), and the rotating shaft (25) passes through the turntable (15) and is rotatably connected to the first workbench (1).

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