A pill making device

Abstract

The present application belongs to the technical field of pill processing, and particularly relates to a pill preparation device, which is composed of multiple rotating plates, upper punch dies, lower punch dies, pressure equalizing components and the like on a machine table. A sliding cylinder of the pressure equalizing component is installed on the fourth rotating plate, and a first piston and a second piston in the sliding cylinder are sealingly and slidably connected and have a first liquid therebetween. The upper punch dies are fixedly connected with the second piston, and upper and lower pressure wheels of a rotating shaft on the machine table apply pressure to the first piston and the lower punch dies, respectively. The first liquid is used to transfer pressure to prevent lateral wear of the upper punch dies, prolong the service life and ensure high-quality stamping. The sliding cylinder is detachably connected with the fourth rotating plate to reduce maintenance cost. After wear, the first liquid leaks to make the upper punch dies unable to perform stamping operation, thereby avoiding defective products. The device also has a reset spring, a flow guide groove and the like, and a liquid receiving member collects the leaked liquid and mixes the leaked liquid with the first liquid to emit fluorescence to indicate wear for maintenance.

Description

Technical Field

[0001] This invention belongs to the field of pill processing technology, and specifically relates to a pill preparation device. Background Technology

[0002] Tibetan medicine preparations are typically in the form of pills, which are spherical or near-spherical preparations made from fine powders or extracts of medicinal materials and suitable binding excipients. Currently, to improve processing efficiency, rotary tablet presses are commonly used. By changing the shape of the die end of the rotary tablet press to a spherical shape, spherical pills can be produced.

[0003] In existing rotary tablet presses, during operation, the contact point between the upper pressure roller and the top of the upper die changes as the upper pressure roller moves. This causes the pressure applied by the upper pressure roller to the end of the die to form an angle with the force-bearing surface of the upper die top when the upper pressure roller first contacts and separates from the top of the die. This increases the wear between the side of the upper die and the upper template, making the upper die wear faster and reducing its service life. Furthermore, continuing tableting operations after the upper die has worn down significantly will affect the stamping quality of the tablets. Therefore, to address these issues, we propose a pill preparation device.

[0004] The methods described in this section are not necessarily methods that had been previously conceived or adopted. Unless otherwise specified, no method described in this section should be assumed to be prior art simply because it is included in this section. Similarly, unless otherwise specified, the issues mentioned in this section should not be considered to be accepted in any prior art. Summary of the Invention

[0005] To overcome the problems existing in related technologies, the present invention discloses a pill preparation apparatus.

[0006] To achieve the above objectives, one technical solution adopted by the present invention is:

[0007] A pill preparation apparatus includes a first rotating plate, a second rotating plate, a third rotating plate, and a fourth rotating plate arranged sequentially from top to bottom on a machine base. It also includes an upper punch and a lower punch. The outer edges of the first and third rotating plates are respectively provided with a plurality of upper and lower punches. The outer edge of the second rotating plate is provided with tableting mold grooves corresponding to the upper and lower punches. A pressure equalization assembly is detachably connected to the fourth rotating plate at the position corresponding to each upper punch. The pressure equalization assembly includes a slide cylinder, a first piston, a second piston, and a limiting member. The slide cylinder is mounted on the fourth rotating plate. The plug and the second piston are slidably connected from top to bottom within the slide cylinder. The portion of the slide cylinder between the first piston and the second piston is filled with a first liquid. The limiting member is located at the upper end of the slide cylinder to restrict the first piston from sliding upward out of the slide cylinder. The upper end of the upper punch is fixedly connected to the second piston. A rotatable shaft is also installed on the machine base. The shaft is fixedly connected to an upper pressure roller located above the fourth rotating plate and a lower pressure roller located below the first rotating plate. The upper pressure roller is used to apply downward pressure to the first piston, and the lower pressure roller is used to apply upward pressure to the lower punch.

[0008] Furthermore, a return spring is sleeved on the outer side of the upper punch die, located between the third rotating plate and the second piston.

[0009] Furthermore, the limiting member is a circular ring structure with an inner diameter smaller than that of the slide cylinder. The first piston includes a small-diameter section and a large-diameter section distributed vertically. The first piston is slidably connected to the inner wall of the slide cylinder through the large-diameter section. The outer diameter of the small-diameter section of the first piston is smaller than that of the inner diameter of the limiting member.

[0010] Furthermore, a guide groove is provided on the upper inner side of the slide cylinder, extending through the lower end of the slide cylinder. When the large diameter section of the first piston abuts against the lower end of the limiting member, the large diameter section of the first piston will close the upper end of the guide groove. When the first piston is pressed down by the upper pressure wheel, the large diameter section of the first piston will release the closure of the upper end of the guide groove.

[0011] Furthermore, multiple guide channels are provided around the circumference of the slide cylinder.

[0012] Furthermore, the inner wall of the slide cylinder is provided with a flow guide ring groove that communicates with the flow guide groove. When the large diameter section of the first piston abuts against the lower end of the limiting member, the large diameter section of the first piston will close the inner part of the flow guide ring groove.

[0013] Furthermore, the pressure equalization assembly also includes a liquid receiving component, which includes an inner cylinder and an outer cylinder. The inner cylinder is spaced apart inside the outer cylinder, and the lower ends of the inner cylinder and the outer cylinder are connected to each other. The liquid receiving component is located on the lower side of the slide to collect the first liquid discharged from the guide channel. The outer diameter of the inner cylinder is smaller than the inner diameter of the slide.

[0014] Furthermore, the liquid receiving component is made of a transparent material and contains a second liquid. The first liquid and the second liquid are two fluorescent liquids that can emit fluorescence when mixed.

[0015] Furthermore, the fourth rotating plate has an installation groove for installing the pressure equalization component. The installation groove has retaining ring grooves on both the upper and lower sides. The limiting member, the sliding cylinder, and the liquid receiving member are stacked and assembled in the installation groove from top to bottom. Each of the two retaining ring grooves is equipped with a retaining ring. The upper retaining ring is used to prevent the limiting member from moving upward out of the installation groove, and the lower retaining ring is used to prevent the liquid receiving member from moving downward out of the installation groove.

[0016] Furthermore, the liquid receiving component also includes a bottom ring plate and an intermediate cylinder. The lower end of the outer cylinder is fixedly connected to the outer periphery of the bottom ring plate, the upper end of the intermediate cylinder is fixedly connected to the inner periphery of the bottom ring plate, the lower end of the inner cylinder is fixedly connected to the lower end of the intermediate cylinder, and both the lower end of the inner cylinder and the lower end of the intermediate cylinder extend downwards out of the mounting groove.

[0017] This invention discloses a pill preparation apparatus. This apparatus transmits pressure via a first liquid to prevent lateral wear of the upper die, extending its service life and ensuring high-quality stamping operations. The slide and the fourth rotating plate are detachably connected, significantly reducing maintenance costs. When the piston and slide are severely worn, leakage of the first liquid will prevent the upper die from performing stamping operations, avoiding the production of defective tablets. Furthermore, the apparatus includes a return spring, a guide channel, and other structures. The liquid receiving component collects leaked liquid, which, after mixing with the first liquid, fluoresces, indicating the wear condition of the upper die to the operator for timely maintenance. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is a partial cross-sectional structural diagram of an embodiment of the present invention;

[0020] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0021] Figure 3 This is a partial top view of an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the slide tube in one embodiment of the present invention;

[0023] Figure 5This is a schematic diagram of the connection of the liquid receiving component in one embodiment of the present invention.

[0024] The meanings of the labels in the attached diagram are as follows:

[0025] 1. Rotating shaft, 2. First rotating plate, 21. Lower pressure roller, 3. Second rotating plate, 4. Third rotating plate, 5. Fourth rotating plate, 51. Mounting groove, 52. Snap ring groove, 53. Upper pressure roller, 54. Upper punch, 6. Reset spring, 61. Lower punch, 7. Pressure equalization assembly, 8. Slide cylinder, 81. Flow guide groove, 812. Flow guide ring groove, 82. First piston, 83. Second piston, 84. Limiting component, 85. Liquid receiving component, 85. Inner cylinder, 851. Outer cylinder, 852. Bottom ring plate, 853. Intermediate cylinder, 854. Detailed Implementation

[0026] The invention will now be further described with reference to the accompanying drawings.

[0027] Reference Figures 1-5 As shown, the pill preparation apparatus of this embodiment includes a first rotating plate 2, a second rotating plate 3, a third rotating plate 4, and a fourth rotating plate 5 arranged sequentially from top to bottom on a machine base (not numbered). It also includes an upper punch 6 and a lower punch 7. The outer edges of the first rotating plate 2 and the third rotating plate 4 are respectively provided with a plurality of upper punches 6 and lower punches 7. The outer edge of the second rotating plate 3 is provided with tableting mold grooves corresponding to the upper punches 6 and lower punches 7. A pressure equalization assembly 8 is detachably connected to the fourth rotating plate 5 at the position corresponding to each upper punch 6. The pressure equalization assembly 8 includes a slide cylinder 81, a first piston 82, a second piston 83, and a limiting member 84. The slide cylinder 81 is mounted on the fourth rotating plate 5. The first piston 82 and the second piston 83 are slidably and sealingly connected from top to bottom within the slide cylinder 81. The portion between the first piston 82 and the second piston 83 is filled with a first liquid. A limiting member 84 is provided at the upper end of the slide cylinder 81 to restrict the first piston 82 from sliding upward out of the slide cylinder 81. The upper end of the upper punch 6 is fixedly connected to the second piston 83. A rotatable rotating shaft 1 is also installed on the machine base. The rotating shaft 1 is fixedly connected to an upper pressure roller 54 located above the fourth rotating plate 5 and a lower pressure roller 21 located below the first rotating plate 2. The upper pressure roller 54 is used to apply downward pressure to the first piston 82, and the lower pressure roller 21 is used to apply upward pressure to the lower punch 7.

[0028] During the production of tablet products, a drive motor drives the rotating shaft 1 to rotate. This rotation causes the upper pressure roller 54 and the lower pressure roller 21 to rotate around the shaft 1. When the upper pressure roller 54 rotates to abut against the upper end of the first piston 82, it presses down on the first piston 82. The first piston 82 then presses down on the second piston 83 through the first liquid at its lower end. Because the first liquid is in uniform contact with the upper end of the second piston 83, it applies downward pressure to the second piston 83. This avoids additional lateral wear between the upper die 6 and the slide cylinder 81, thus extending the service life of the upper die 6 and allowing it to maintain high-quality stamping operations for extended periods.

[0029] It is worth mentioning that the torque is transmitted between the first piston 82 and the second piston 83 through a liquid. Since the liquid is difficult to compress, the transmission efficiency between the two is relatively high.

[0030] After prolonged and severe wear between the first piston 82 and the slide 81, the first liquid inside the slide 81 will leak upward from the wear gap on the side of the first piston 82 during the downward pressing of the first piston 82. As a result, the first liquid cannot form pressure to apply pressure to the second piston 83, and the upper punch 6 cannot perform the punching operation, thus avoiding the production of defective tablet products.

[0031] Similarly, after prolonged and severe wear between the second piston 83 and the slide 81, the first liquid inside the slide 81 will leak downward from the wear gap on the side of the second piston 83 during the downward pressing of the second piston 83. In this way, the first liquid cannot form pressure to apply pressure to the second piston 83, and the upper punch 6 cannot perform the stamping operation, thus avoiding the production of defective tablet products.

[0032] In this embodiment, since the slide 81 is detachably connected to the fourth rotating plate 5, it can be replaced after it wears out, thus avoiding the need to replace the entire plate. This design can significantly reduce the maintenance cost of the device.

[0033] In this embodiment, a return spring 61 is sleeved on the outer side of the upper punch 6 between the third rotating plate 4 and the second piston 83. The return spring 61, in conjunction with the third rotating plate 4, is used to push the second piston 83 upward so that the second piston 83, the upper punch 6, and the first piston 82 can be reset upward after the pressure is released.

[0034] In this embodiment, the limiting member 84 is a circular structure with an inner diameter smaller than that of the slide cylinder 81. The first piston 82 includes a small diameter section and a large diameter section distributed vertically. The first piston 82 is slidably connected to the inner wall of the slide cylinder 81 through the large diameter section. The outer diameter of the small diameter section of the first piston 82 is smaller than that of the limiting member 84. When the first piston 82 moves upward until the large diameter section abuts against the limiting member 84, the first piston 82 is restricted from continuing to move upward. In this way, the first piston 82 can be restricted from sliding upward out of the slide cylinder 81.

[0035] In this embodiment, a guide groove 811 is provided on the upper inner side of the slide cylinder 81, penetrating the lower end of the slide cylinder 81. When the large diameter section of the first piston 82 abuts against the lower end of the limiting member 84, the large diameter section of the first piston 82 will close the upper end of the guide groove 811. When the first piston 82 is pressed down by the upper pressure roller 54, the large diameter section of the first piston 82 will release the closure of the upper end of the guide groove 811.

[0036] When the first piston 82 is not pressed down by the upper pressure roller 54, the large diameter section of the first piston 82 will be in contact with the lower end of the limiting member 84 under the pushing action of the return spring 61, so as to seal the upper end of the guide groove 811 and prevent the first liquid on the lower side of the first piston 82 from being discharged from the guide groove 811.

[0037] After prolonged and severe wear between the first piston 82 and the slide 81, the first liquid will be discharged upward from the wear gap on the side of the first piston 82 under the pressure of the return spring 61. Subsequently, when the first piston 82 is pressed down by the upper pressure roller 54, the large diameter section of the first piston 82 will move down to the lower side of the guide groove 811 to release the closure of the upper end of the guide groove 811. At this time, the first liquid located on the upper side of the large diameter section of the first piston 82 can flow into the guide groove 811 and finally flow out from the lower end of the guide groove 811. In this way, when a wear gap is generated between the first piston 82 and the slide 81, and when a wear gap is generated between the second piston 83 and the slide 81, the first liquid is discharged from the lower end of the slide 81 so that the first liquid can be collected uniformly.

[0038] In this embodiment, multiple guide channels 811 are arranged around the slide cylinder 81 in a circumferential manner, which can guide the first liquid leaking from different locations and improve the guiding efficiency.

[0039] In this embodiment, the inner wall of the slide cylinder 81 is provided with a flow-guiding annular groove 812 that communicates with the flow-guiding groove 811. When the large-diameter section of the first piston 82 abuts against the lower end of the limiting member 84, the large-diameter section of the first piston 82 will close the inner part of the flow-guiding annular groove 812. This arrangement can guide the first liquid leaking from all positions around the slide cylinder 81, so that the upward leaking first liquid can smoothly enter the flow-guiding groove 811.

[0040] In this embodiment, the pressure equalization assembly 8 further includes a liquid receiving component 85, which includes an inner cylinder 851 and an outer cylinder 852. The inner cylinder 851 is spaced apart inside the outer cylinder 852, and the lower ends of the inner cylinder 851 and the outer cylinder 852 are connected to each other. The liquid receiving component 85 is located on the lower side of the slide cylinder 81 to collect the first liquid discharged from the guide groove 811. The outer diameter of the inner cylinder 851 is smaller than the inner diameter of the slide cylinder 81.

[0041] The liquid receiving part 85 can collect the first liquid flowing down from the guide groove 811. In addition, since the outer diameter of the inner cylinder 851 is smaller than the inner diameter of the slide cylinder 81, the first liquid leaking from the wear gap between the second piston 83 and the slide cylinder 81 will flow down along the inner wall of the slide cylinder 81 and flow directly into the liquid receiving part 85. This allows the first liquid from both places to be collected together for subsequent maintenance.

[0042] In this embodiment, the liquid receiving component 85 is made of transparent material and contains a second liquid. The first liquid and the second liquid are two fluorescent liquids that can emit fluorescence when mixed. Specifically, one is a peroxide and the other is a mixture of an ester compound and a fluorescent dye.

[0043] When the first liquid leaks into the receiving part 85 and mixes with the second liquid, it will emit fluorescence. By observing the fluorescence, the staff can know the wear condition of the upper die 6, and thus maintain the relevant parts in a timely manner.

[0044] In this embodiment, the fourth rotating plate 5 is provided with a mounting groove 51 for mounting the pressure equalization component 8. The mounting groove 51 has a retaining spring groove 52 on both the upper and lower sides. The limiting member 84, the sliding cylinder 81, and the liquid receiving member 85 are stacked and assembled in the mounting groove 51 from top to bottom. Each of the two retaining spring grooves 52 is equipped with a retaining spring 53. The upper retaining spring 53 is used to prevent the limiting member 84 from disengaging upward from the mounting groove 51, and the lower retaining spring 53 is used to prevent the liquid receiving member 85 from disengaging downward from the mounting groove 51. With this arrangement, the pressure equalization component 8 can be mounted on the fourth rotating plate 5 to form a detachable connection with the fourth rotating plate 5.

[0045] In this embodiment, the liquid receiving component 85 further includes a bottom ring plate 853 and an intermediate cylinder 854. The lower end of the outer cylinder 852 is fixedly connected to the outer periphery of the bottom ring plate 853, the upper end of the intermediate cylinder 854 is fixedly connected to the inner periphery of the bottom ring plate 853, and the lower end of the inner cylinder 851 is fixedly connected to the lower end of the intermediate cylinder 854. Both the lower ends of the inner cylinder 851 and the lower ends of the intermediate cylinder 854 extend downwards into the mounting groove 51. This arrangement allows the mixture of the first liquid and the second liquid to flow to the lower side of the mounting groove 51, thereby effectively exposing the fluorescence and increasing the fluorescence irradiation range.

[0046] In summary, this invention discloses a pill preparation apparatus. This apparatus transmits pressure via a first liquid to prevent lateral wear of the upper die, extending its service life and ensuring high-quality stamping operations. The slide and the fourth rotating plate are detachably connected, significantly reducing maintenance costs. When the piston and slide are severely worn, leakage of the first liquid will prevent the upper die from performing stamping operations, avoiding the production of defective tablets. Furthermore, the apparatus is equipped with a return spring, a guide groove, and other structures. The liquid receiving component can collect leaked liquid, which, after mixing with the first liquid, fluoresces, indicating the wear condition of the upper die to the operator for timely maintenance.

[0047] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A pill preparation apparatus, comprising a first rotating plate, a second rotating plate, a third rotating plate, and a fourth rotating plate arranged sequentially from top to bottom on a machine platform, characterized in that: It also includes an upper punch and a lower punch. The outer edges of the first and third rotating plates are respectively provided with a plurality of upper punches and lower punches. The outer edge of the second rotating plate is provided with a tableting mold groove corresponding to the upper punches and lower punches. The fourth rotating plate is detachably connected to a pressure equalization assembly corresponding to the position of each upper punch. The pressure equalization assembly includes a slide cylinder, a first piston, a second piston, and a limiting member. The slide cylinder is installed on the fourth rotating plate. The first piston and the second piston are sealed and slidably connected from top to bottom in the slide cylinder. The part of the slide cylinder between the first piston and the second piston is filled with a first liquid. The limiting member is provided at the upper end of the slide cylinder to restrict the first piston from sliding upward out of the slide cylinder. The upper end of the upper punch is fixedly connected to the second piston. The machine base is also equipped with a rotatable rotating shaft. The rotating shaft is fixedly connected to an upper pressure roller located above the fourth rotating plate and a lower pressure roller located below the first rotating plate. The upper pressure roller is used to apply downward pressure to the first piston, and the lower pressure roller is used to apply upward pressure to the lower punch. A return spring is fitted on the outer side of the upper punch die, located between the third rotating plate and the second piston; The limiting member is a circular ring structure with an inner diameter smaller than that of the slide cylinder. The first piston includes a small diameter section and a large diameter section distributed vertically. The first piston is slidably connected to the inner wall of the slide cylinder through the large diameter section. The outer diameter of the small diameter section of the first piston is smaller than that of the limiting member. A guide groove is provided on the upper inner side of the slide cylinder, extending through the lower end of the slide cylinder. When the large diameter section of the first piston abuts against the lower end of the limiting member, the large diameter section of the first piston will close the upper end of the guide groove. When the first piston is pressed down by the upper pressure wheel, the large diameter section of the first piston will release the closure of the upper end of the guide groove.

2. The pill preparation apparatus according to claim 1, characterized in that: Multiple guide channels are arranged around the circumference of the slide cylinder.

3. The pill preparation apparatus according to claim 1, characterized in that: The inner wall of the slide cylinder is provided with a flow guide ring groove that communicates with the flow guide groove. When the large diameter section of the first piston abuts against the lower end of the limiting member, the large diameter section of the first piston will close the inner part of the flow guide ring groove.

4. A pill preparation apparatus according to any one of claims 1-3, characterized in that: The pressure equalization assembly further includes a liquid receiving component, which includes an inner cylinder and an outer cylinder. The inner cylinder is spaced apart inside the outer cylinder, and the lower ends of the inner cylinder and the outer cylinder are connected to each other. The liquid receiving component is located on the lower side of the slide to collect the first liquid discharged from the guide channel. The outer diameter of the inner cylinder is smaller than the inner diameter of the slide.

5. The pill preparation apparatus according to claim 4, characterized in that: The liquid receiving component is made of transparent material and contains a second liquid. The first liquid and the second liquid are two fluorescent liquids that can emit fluorescence when mixed.

6. The pill preparation apparatus according to claim 5, characterized in that: The fourth rotating plate has an installation groove for installing the pressure equalization component. The installation groove has a retaining spring groove on both the upper and lower sides. The limiting member, the sliding cylinder, and the liquid receiving member are stacked and assembled in the installation groove from top to bottom. Each of the two retaining spring grooves is equipped with a retaining spring. The upper retaining spring is used to prevent the limiting member from moving upward out of the installation groove, and the lower retaining spring is used to prevent the liquid receiving member from moving downward out of the installation groove.

7. The pill preparation apparatus according to claim 6, characterized in that: The liquid receiving component also includes a bottom ring plate and an intermediate cylinder. The lower end of the outer cylinder is fixedly connected to the outer periphery of the bottom ring plate, the upper end of the intermediate cylinder is fixedly connected to the inner periphery of the bottom ring plate, and the lower end of the inner cylinder is fixedly connected to the lower end of the intermediate cylinder. Both the lower end of the inner cylinder and the lower end of the intermediate cylinder extend downwards into the mounting groove.

Images