Adjustable full-automatic dry powder press

Abstract

The invention relates to the technical field of medicine pressing, and discloses an adjustable full-automatic dry powder press which comprises a pressing box, one side of the outer wall of the pressing box communicates with a feeding assembly used for conveying dry powder to be pressed, a cleaning assembly is arranged in the feeding assembly, and the end, extending into the pressing box, of the feeding assembly communicates with a vibrating screen assembly. And the vibrating screen assembly is used for vibrating the conveyed medicine dry powder, and a pressing mechanism is arranged at the top of the vibrating screen assembly and used for pressing the medicine dry powder in a high-pressure mode. The infrared sensor installed at the bottom of the pressing disc scans the surface of powder in the frame mold, and the system can sense and calculate the actual filling height of each mold cavity in real time. After the data is fed back to the hydraulic system, the pressure applying stroke and pressure of the hydraulic rod can be automatically and finely adjusted, and accurate pressure adaptation of tablets with different thicknesses is achieved. And the equipment can adaptively process material fluctuation of different prescriptions or batches, and the stability and reliability of the final product quality are ensured.

Description

Technical Field

[0001] This invention relates to the field of drug compression technology, specifically to an adjustable fully automatic dry powder press. Background Technology

[0002] Dry powder presses, especially known as tablet presses in the pharmaceutical industry, are core equipment for preparing solid dosage forms like tablets. Their basic working principle involves applying high pressure to drug powder within a mold cavity using upper and lower punches, compressing it into tablets of a predetermined shape, size, hardness, and weight.

[0003] The feeding systems of existing equipment, especially screw feeders, require thorough cleaning after each batch of production to prevent cross-contamination between different batches or types of materials. Traditional cleaning methods rely on manual disassembly, washing, and reinstallation, a process that is not only time-consuming and labor-intensive, leading to reduced equipment utilization, but also causes some sticky materials to adhere to the auger blades during feeding, resulting in uneven feeding or even blockages, affecting the continuity and stability of production.

[0004] Furthermore, the physical properties of drug powder, such as flowability and filling density, directly affect the weight variation of tablets, which is a key indicator for measuring tablet quality. Most existing equipment relies on gravity for natural filling, which can easily lead to uneven filling for powders with poor flowability or prone to stratification. In addition, current technology lacks a real-time online detection and feedback mechanism for the filling status, making it impossible to dynamically adjust pressing parameters based on the actual powder height in each mold cavity. This results in tablets pressed under fixed parameters potentially exhibiting inconsistent thickness, uneven density, or even being too hard or too soft, making it difficult to guarantee a high yield. Simultaneously, under long-term operation, even minor deformations of the press's worktable or installation errors can lead to uneven distribution of pressing force, further exacerbating fluctuations in product quality. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an adjustable fully automatic dry powder press, which solves the problem that existing technologies lack a real-time online detection and feedback mechanism for the filling state and cannot dynamically adjust the pressing parameters according to the actual powder height of each mold cavity.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an adjustable fully automatic dry powder press, comprising a pressing box, a feeding assembly connected to one side of the outer wall of the pressing box for conveying the dry powder to be pressed, a cleaning assembly inside the feeding assembly, a vibrating screen assembly connected to one end of the feeding assembly extending into the pressing box for vibrating the conveyed drug dry powder, and a pressing mechanism on the top of the vibrating screen assembly for strong pressing of the drug dry powder.

[0007] Preferably, the feeding assembly includes a double-layer stainless steel feeding cylinder, which is configured as an outer protective layer and an inner feeding layer. An extension cavity is provided on one side of the outer wall of the outer protective layer, and a telescopic rod is fixedly connected to one side of the inner wall of the extension cavity. A servo motor is fixedly connected to the output end of the telescopic rod, and an internal drive gear is fixedly connected to the output end of the servo motor. The internal drive gear meshes with two internal drive rings rotatably connected to the inner wall of the outer protective layer and the outer wall of the inner feeding layer. A main shaft is fixedly connected to one side of the outer wall of one of the internal drive rings. One end of the main shaft penetrates the inner feeding layer and is fixedly connected to a conveying auger. A synchronizing rod is fixedly connected to one end of the outer wall of the other internal drive ring, and an electromagnet is fixedly connected to the other end of the synchronizing rod. The electromagnet corresponds to a cleaning component magnetically attracted to one end of the conveying auger.

[0008] Preferably, one end of the double-layer stainless steel feeding cylinder is connected to a feeding pipe, the synchronous adjustment component is located at the bottom of the feeding pipe, the synchronous adjustment component includes a drive motor, the drive motor is installed at the bottom of the inner wall of the pressing box, the output end of the drive motor is fixedly connected to a turntable, the surface of the turntable is embedded with a rotating ring, the top wall of the rotating ring is provided with uniformly distributed frame molds, and the vibrating screen component is located outside the frame molds.

[0009] Preferably, the vibrating screen assembly includes a vibrating ring disposed on the top wall of the rotating ring, and the vibrating ring is a pressure pad type vibrating disc.

[0010] Preferably, the pressing mechanism includes a hydraulic assembly installed on the inner top wall of the pressing box. The hydraulic assembly includes a hydraulic rod, the output end of which is fixedly connected to one end of an upper punch rod, and the other end of the upper punch rod is fixedly connected to a pressure plate. The bottom of the pressure plate is provided with multiple pressure rods, which can be embedded inside the frame mold. An infrared sensor is provided at the bottom of the pressure plate.

[0011] Preferably, the inner bottom wall of the pressing box is provided with a support plate, and the top wall of the support plate is in contact with the bottom wall of the turntable.

[0012] Preferably, the support plate and the turntable are further provided with a height compensation component. The height compensation component includes a slide rail, which is located on the top wall of the support plate and the bottom wall of the turntable. A roller is slidably connected inside the slide rail.

[0013] Preferably, an extension rod is installed on one side of the outer wall of the spindle, and a cross groove is opened on one side of the outer wall of the extension rod, which matches the cross protrusion fixed on one side of the outer wall of the internal drive gear.

[0014] Preferably, the movement trajectory of the cleaning component is the same as the edge curve of the conveying auger.

[0015] Working Principle: First, the double-layer stainless steel feeding cylinder of the feeding assembly is driven by a servo motor to rotate the inner drive gear and inner drive ring, which in turn drives the main shaft and conveying auger to rotate, conveying the dry powder to be pressed along the inner feeding layer to the feeding pipe. At the same time, the position of the servo motor can be adjusted by the telescopic rod to change the meshing state of the inner drive gear and inner drive ring to adjust the conveying speed. The electromagnet driven by the synchronization rod can attract cleaning parts and move along the edge curve of the conveying auger to clean the inside of the feeding assembly. The feeding pipe conveys the dry powder to the rotating ring of the synchronization adjustment assembly. The drive motor drives the turntable and rotating ring to rotate, so that the frame mold on the top wall of the rotating ring moves sequentially to the bottom of the vibrating screen assembly. The vibration of the vibrating screen assembly... The ring (pressure pad type vibratory plate) vibrates and flattens the dry powder in the mold frame to ensure uniform distribution. Then, the mold frame containing the flattened dry powder moves with the rotating ring to the bottom of the pressing mechanism. The hydraulic assembly of the pressing mechanism drives the hydraulic rod to extend, which moves the upper punch, pressing plate and pressing rod downward. The pressing rod is embedded in the mold frame to press the dry powder with strong pressure. The infrared sensor at the bottom of the pressing plate can monitor the pressing position and pressing status. At the same time, the support plate on the bottom wall of the pressing box supports the turntable. The height compensation component inside the support plate and the turntable slides through the roller in the slide to achieve height adaptation and stable support when the turntable rotates. Finally, the fully automatic adjustable pressing operation of the dry powder is completed.

[0016] This invention provides an adjustable fully automatic dry powder press. It has the following advantages: 1. This invention utilizes an infrared sensor installed at the bottom of the pressure plate to scan the surface of the powder material inside the mold. The system can sense and calculate the actual filling height of each mold cavity in real time. This data is fed back to the hydraulic system, which can automatically fine-tune the pressure stroke and pressure of the hydraulic rod to achieve precise pressure adaptation for tablets of different thicknesses. This intelligent closed-loop control mechanism enables the equipment to adaptively handle material fluctuations in different formulations or batches, ensuring the stable and reliable quality of the final product.

[0017] 2. This invention utilizes a dual internal drive ring gear transmission structure driven by a single servo motor to simultaneously realize the rotational feeding of the conveying auger and the revolution of the cleaning component; combined with the axial movement driven by the telescopic rod and the linkage design of the cross slot and protrusion, the equipment can quickly switch the working mode from "feeding" to "cleaning" without disassembly, greatly improving the efficiency and convenience of continuous operation and effectively avoiding cross-contamination of different batches of materials.

[0018] 3. This invention integrates the movement of the mold frame, the compaction of the vibrating ring, and the pressing of the pressure bar into a continuous automated cycle through an intermittent turntable controlled by a drive motor. The vibration component effectively ensures the uniformity and consistency of powder filling, laying the foundation for subsequent high-quality pressing; while the height compensation component, through the adaptive fine adjustment of the rollers, ensures the uniformity of the pressing force distribution, thereby significantly improving the density consistency and yield of tablets. Attached Figure Description

[0019] Figure 1 This is a perspective view of the fully automatic dry powder press in this invention; Figure 2 This is a diagram illustrating the fully automatic dry powder press of the present invention; Figure 3 This is a cross-sectional view of the cleaning component in this invention; Figure 4 This is an exploded view of the cleaning component in this invention; Figure 5 This is an enlarged view of point A in this invention; Figure 6 This is an exploded view of the fully automatic dry powder press in this invention; Figure 7 This is one of the exploded views of the synchronization adjustment component in this invention; Figure 8 This is the second exploded view of the synchronization adjustment component in this invention.

[0020] The components include: 1. Pressing box; 2. Feeding assembly; 3. Cleaning assembly; 4. Vibrating screen assembly; 5. Pressing mechanism; 6. Synchronization adjustment assembly; 7. Support plate; 8. Height compensation assembly; 9. Extension rod; 10. Cross groove; 11. Cross protrusion; 201. Double-layer stainless steel feeding cylinder; 202. Outer protective layer; 203. Inner feeding layer; 204. Extension cavity; 205. Telescopic rod; 206. Servo motor; 207. Internal drive gear; 208. 209. Inner drive ring; 210. Main shaft; 211. Conveying auger; 212. Synchronizing rod; 213. Electromagnet; 214. Cleaning component; 215. Feeding pipe; 401. Vibrating ring; 501. Hydraulic assembly; 502. Hydraulic rod; 503. Upper punch rod; 504. Pressure plate; 505. Pressure rod; 506. Infrared sensor; 601. Drive motor; 602. Turntable; 603. Rotary ring; 604. Frame mold; 801. Slide rail; 802. Roller. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see the appendix Figure 1 - Appendix Figure 8This invention provides an adjustable fully automatic dry powder press, including a pressing box 1. A feeding component 2 is connected to one side of the outer wall of the pressing box 1 for conveying the dry powder to be pressed. A cleaning component 3 is provided inside the feeding component 2. A vibrating screen component 4 is connected to one end of the feeding component 2 that extends into the pressing box 1 for vibrating the conveyed drug dry powder. A pressing mechanism 5 is provided on the top of the vibrating screen component 4 for strongly pressing the drug dry powder.

[0023] The feeding assembly 2 includes a double-layer stainless steel feeding cylinder 201, which is configured as an outer protective layer 202 and an inner feeding layer 203. An extension cavity 204 is provided on one side of the outer wall of the outer protective layer 202. A telescopic rod 205 is fixedly connected to one side of the inner wall of the extension cavity 204. A servo motor 206 is fixedly connected to the output end of the telescopic rod 205. An internal drive gear 207 is fixedly connected to the output end of the servo motor 206. The internal drive gear 207 is rotatably connected within the outer protective layer 202. Two inner drive rings 208 are engaged and connected to the outer wall of the inner feeding layer 203. A main shaft 209 is fixedly connected to one side of the outer wall of one inner drive ring 208. One end of the main shaft 209 passes through the inner feeding layer 203 and is fixedly connected to the conveying auger 210. One end of the synchronizing rod 211 is fixedly connected to one side of the outer wall of the other inner drive ring 208. An electromagnet 212 is fixedly connected to the other end of the synchronizing rod 211. The electromagnet 212 corresponds to the cleaning part 213 that is magnetically attracted to one end of the conveying auger 210.

[0024] The movement trajectory of the cleaning component 213 is the same as the edge curve of the conveying auger 210.

[0025] An extension rod 9 is installed on one side of the outer wall of the main shaft 209. A cross groove 10 is opened on one side of the outer wall of the extension rod 9. The cross groove 10 matches the cross protrusion 11 fixed on one side of the outer wall of the inner drive gear 207.

[0026] Specifically, the servo motor 206 starts, driving the internal drive gear 207 to rotate. The internal drive gear 207 simultaneously meshes with two internal drive rings 208, causing them to rotate synchronously. The first internal drive ring 208 drives the conveying auger 210 to rotate via the main shaft 209, propelling the dry powder material forward and achieving continuous and stable feeding. The second internal drive ring 208 drives the electromagnet 212 via the synchronizing rod 211, causing it to revolve around the axis of the conveying auger 210. When cleaning is required, the telescopic rod 205 pushes the servo motor 206 and the entire gear transmission system towards the inner feeding layer 203, causing the cleaning component 213 fixed on the electromagnet 212 to approach the spiral surface of the conveying auger 210. Since the movement trajectory of the cleaning component 213 is the same as the edge curve of the conveying auger 210, it can maintain a constant gap or slight contact with the auger blades during its revolution, thereby efficiently scraping off the adhering material. The fitting design of the cross groove 10 on the extension rod 9 and the cross protrusion 11 on the internal drive gear 207 ensures that the power transmission structure is always tightly connected when the telescopic rod 205 is pushed and pulled axially, without slipping or disengaging, thus realizing smooth switching and linkage between feeding and cleaning actions.

[0027] One end of the double-layer stainless steel feeding cylinder 201 is connected to the feeding pipe 214. The synchronous adjustment component 6 is located at the bottom of the feeding pipe 214. The synchronous adjustment component 6 includes a drive motor 601. The drive motor 601 is installed on the bottom of the inner wall of the pressing box 1. The output end of the drive motor 601 is fixedly connected to a turntable 602. A rotating ring 603 is embedded on the surface of the turntable 602. The top wall of the rotating ring 603 is provided with evenly distributed frame molds 604. The vibrating screen component 4 is located outside the frame molds 604.

[0028] Specifically, after the material falls through the feeding pipe 214, it first enters the frame mold 604 supported by the rotating ring 603. The drive motor 601 starts, driving the turntable 602 and the rotating ring 603 on it to perform intermittent rotational motion. After the drug delivery is completed, the vibrating ring 401 outside the frame mold 604 starts. This pressure pad type vibrating plate generates high-frequency micro-amplitude vibration, which is transmitted to the dry powder in the frame mold 604 through the rotating ring 603. The vibration process can break up the air pockets in the powder, promote the uniform distribution of the powder in the mold cavity and achieve preliminary compaction, and at the same time scrape the surface to ensure that the filling amount of material in each frame mold 604 is highly consistent, laying the foundation for subsequent precise pressing. In addition, under the rotation of the rotating ring 603, the pressed drug in the frame mold 604 can fall out from the inside of the pressing box 1.

[0029] The vibrating screen assembly 4 includes a vibrating ring 401, which is located on the top wall of the rotating ring 603. The vibrating ring 401 is a pressure pad type vibrating disc.

[0030] The pressing mechanism 5 includes a hydraulic assembly 501, which is installed on the inner top wall of the pressing box 1. The hydraulic assembly 501 includes a hydraulic rod 502. The output end of the hydraulic rod 502 is fixedly connected to one end of an upper punch rod 503. The other end of the upper punch rod 503 is fixedly connected to a pressure plate 504. The bottom of the pressure plate 504 is provided with multiple pressure rods 505, which can be embedded inside the frame mold 604. The bottom of the pressure plate 504 is provided with an infrared sensor 506.

[0031] The inner bottom wall of the pressing box 1 is provided with a support plate 7, and the top wall of the support plate 7 is in contact with the bottom wall of the turntable 602.

[0032] The support plate 7 and the turntable 602 are also equipped with a height compensation component 8. The height compensation component 8 includes a slide rail 801, which is located on the top wall of the support plate 7 and the bottom wall of the turntable 602. A roller 802 is slidably connected inside the slide rail 801.

[0033] Specifically, when the vibrating screen and the mold 604 containing material rotates to the pressing station, the turntable 602 stops again. The infrared sensor 506 at the bottom of the pressing plate 504 detects that the mold 604 is in place and sends a signal to the central controller. The hydraulic assembly 501 is activated, and the hydraulic rod 502 pushes the upper punch 503, the pressing plate 504, and multiple pressing rods 505 downwards as a whole. The pressing rods 505 precisely embed into the corresponding molds 604, applying enormous vertical pressure to the internal dry powder, pressing it into shape. During this process, the support plate 7 provides stable bottom support for the turntable 602 to withstand the enormous pressing reaction force. The height compensation component 8 then comes into play: multiple rollers 802 distributed in the slides 801 inside the support plate 7 and turntable 602 can perform minute radial sliding and rolling within the slides 801 under pressure, automatically compensating for any minor flatness errors or deformations that may exist between the turntable 602 and the support plate 7. This ensures that the pressing force is evenly distributed on each mold 604, preventing uneven tablet density or equipment overload due to uneven force. After pressing, the hydraulic rod 502 lifts the pressure plate 504 and the pressure rod 505, the turntable 602 rotates, and the pressed tablets are sent to the next discharge station. At the same time, a new mold 604 enters the pressing station, and the cycle begins. The vibration effectively ensures the uniformity and consistency of powder filling, laying the foundation for subsequent high-quality pressing. The height compensation component 8, through the adaptive fine-tuning of the rollers 802, ensures the uniformity of the pressing force distribution, thereby significantly improving the density consistency of the tablets and the yield.

[0034] Furthermore, in this embodiment, under the vibration of the vibrating sieve assembly 4, the surface of the powder inside the frame mold 604 is flat. The infrared sensor 506 emits infrared rays into the inside of the frame mold 604 and reflects them back. By the different heights of the powder inside the frame mold 604, the pressure of the hydraulic rod 502 is self-adjusted, so that this device can form a pressure self-adjustment when pressing drugs of different thicknesses.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable fully automatic dry powder press, comprising a pressing box (1), characterized in that, The outer wall of the pressing box (1) is connected to a feeding assembly (2), which is used to convey the dry powder to be pressed. The inside of the feeding assembly (2) is provided with a cleaning assembly (3). One end of the feeding assembly (2) extending into the pressing box (1) is connected to a vibrating screen assembly (4), which is used to vibrate the conveyed drug dry powder. The top of the vibrating screen assembly (4) is provided with a pressing mechanism (5), which performs strong pressure on the drug dry powder. The bottom of the pressing mechanism (5) is provided with a synchronous adjustment assembly (6).

2. The adjustable fully automatic dry powder press according to claim 1, characterized in that, The feeding assembly (2) includes a double-layer stainless steel feeding cylinder (201), which is configured as an outer protective layer (202) and an inner feeding layer (203). An extension cavity (204) is provided on one side of the outer wall of the outer protective layer (202), and a telescopic rod (205) is fixedly connected to one side of the inner wall of the extension cavity (204). A servo motor (206) is fixedly connected to the output end of the telescopic rod (205), and an internal drive gear (207) is fixedly connected to the output end of the servo motor (206). The internal drive gear (207) is rotatably connected to the outer protective layer (202). 2) Two inner drive rings (208) are meshed and connected to the inner wall and the outer wall of the inner feeding layer (203). A main shaft (209) is fixedly connected to one side of the outer wall of the inner drive ring (208). One end of the main shaft (209) passes through the inner feeding layer (203) and is fixedly connected to the conveying auger (210). One end of the synchronizing rod (211) is fixedly connected to one side of the outer wall of the inner drive ring (208). An electromagnet (212) is fixedly connected to the other end of the synchronizing rod (211). The electromagnet (212) corresponds to the cleaning part (213) that is magnetically attracted to one end of the conveying auger (210).

3. An adjustable fully automatic dry powder press according to claim 2, characterized in that, One end of the double-layer stainless steel feeding cylinder (201) is connected to the feeding pipe (214). The synchronous adjustment component (6) is located at the bottom of the feeding pipe (214). The synchronous adjustment component (6) includes a drive motor (601). The drive motor (601) is installed on the bottom of the inner wall of the pressing box (1). The output end of the drive motor (601) is fixedly connected to a turntable (602). A rotating ring (603) is embedded on the surface of the turntable (602). The top wall of the rotating ring (603) is provided with uniformly distributed frame molds (604). The vibrating screen component (4) is located outside the frame molds (604).

4. An adjustable fully automatic dry powder press according to claim 3, characterized in that, The vibrating screen assembly (4) includes a vibrating ring (401), which is located on the top wall of the rotating ring (603). The vibrating ring (401) is a pressure pad type vibrating disc.

5. An adjustable fully automatic dry powder press according to claim 1, characterized in that, The pressing mechanism (5) includes a hydraulic assembly (501), which is installed on the inner top wall of the pressing box (1). The hydraulic assembly (501) includes a hydraulic rod (502). The output end of the hydraulic rod (502) is fixedly connected to one end of an upper punch (503), and the other end of the upper punch (503) is fixedly connected to a pressure plate (504). The bottom of the pressure plate (504) is provided with multiple pressure rods (505), which can be embedded inside the frame mold (604). The bottom of the pressure plate (504) is provided with an infrared sensor (506).

6. An adjustable fully automatic dry powder press according to claim 3, characterized in that, The inner bottom wall of the pressing box (1) is provided with a support plate (7), and the top wall of the support plate (7) is in contact with the bottom wall of the turntable (602).

7. An adjustable fully automatic dry powder press according to claim 6, characterized in that, The support plate (7) and the turntable (602) are also provided with a height compensation component (8). The height compensation component (8) includes a slide (801). The slide (801) is located on the top wall of the support plate (7) and the bottom wall of the turntable (602). A roller (802) is slidably connected inside the slide (801).

8. An adjustable fully automatic dry powder press according to claim 2, characterized in that, An extension rod (9) is installed on one side of the outer wall of the main shaft (209). A cross groove (10) is opened on one side of the outer wall of the extension rod (9). The cross groove (10) matches the cross protrusion (11) fixed on one side of the outer wall of the inner drive gear (207).

9. An adjustable fully automatic dry powder press according to claim 2, characterized in that, The movement trajectory of the cleaning component (213) is the same as the edge curve of the conveying auger (210).

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