A spin-type tablet press

Abstract

This invention discloses a spin-type tablet press, comprising a machine base and a top shell. A processing cavity is formed between the top shell and the top surface of the machine base. The processing cavity contains a first drive box, a connecting protective seat, and an upper guide rail seat. Inside the machine base are a mounting base and a lower guide rail seat. A drive motor is mounted on the mounting base and connected to a lower die seat. A middle die seat and an upper die seat are positioned above the lower die seat. The upper die seat has multiple upper punches, the middle die seat has multiple sets of tableting holes, and the lower die seat has multiple lower punches. The upper punches, tableting holes, and lower punches correspond one-to-one. The bottom of each lower punch has a spin tooth, and a spin rack is located in the lower guide rail seat. The spin teeth of the lower punches mesh with the spin rack at the tablet pushing section of the lower guide rail seat. This structure enables the lower punches to spin during the tablet pushing stage, applying axial and radial forces to the formed tablets, rapidly pushing them out. This improves efficiency while avoiding stress concentration and damage caused by a single force on the formed tablets.

Description

Technical Field

[0001] This invention relates to the field of tablet production equipment technology, specifically to a spin-type tablet press. Background Technology

[0002] Currently, the existing high-speed tablet press is a machine that compresses various granular raw materials into round or irregularly shaped tablets through continuous rotation. It is the basic equipment for pharmaceutical, chemical, food and other industrial sectors to compress various granular raw materials into tablets.

[0003] Existing rotary tablet presses used in pharmaceuticals typically push tablets out through a hole via a lower punch after compressing the raw material. The tablets are then blocked by a baffle plate at the discharge port for further processing. However, the single upward push of the lower punch applies a single vertical force to the tablet, which can easily cause stress concentration at the sharp point of the tablet. This leads to tablet breakage during ejection, resulting in low yield and wasted resources. Therefore, a self-rotating tablet press is designed to improve efficiency while avoiding stress concentration and damage caused by a single force on the formed tablets. Summary of the Invention

[0004] The purpose of this invention is to provide a spin-type tablet press, which, by setting spin teeth to mesh with a spin rack, rotates during the movement of the lower punch, and simultaneously cooperates with the tablet pusher section to push the lower punch upward, thus quickly ejecting the formed tablets. This solves the problem that a single vertical upward force can easily cause stress concentration at the sharp point of the tablet, leading to easy tablet breakage during ejection, low yield, and waste of resources.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A spin-type tablet press includes a machine base. A top shell is supported on the top of the machine base by four support rods. A processing cavity is formed between the top shell and the top surface of the machine base. A first drive box is provided on the top of the processing cavity. A connecting protective seat is connected to the bottom of the first drive box. An upper guide rail seat is connected to the bottom of the connecting protective seat. An installation base and a lower guide rail seat are provided inside the machine base. The lower guide rail seat is fixedly connected to the inside of the machine base. A drive motor is provided on the installation base. The output rod of the drive motor passes through the lower guide rail seat and is connected to a lower mold base. A middle mold base and an upper mold base are provided above the lower mold base. The lower mold base, middle mold base and upper mold base are coaxially connected by a connecting column. A feeding box is provided on one side of the top of the middle mold base. A discharging system is provided on one side of the feeding box.

[0007] The upper die base has multiple upper punches at its edge, the middle die base has multiple sets of pressing holes at its edge, and the lower die base has multiple lower punches at its edge. The upper punches, pressing holes, and lower punches correspond one-to-one, and the bottom of the lower punches is equipped with a spin tooth. The lower guide rail is equipped with a spin rack, and the spin tooth of the lower punch and the spin rack mesh at the push section of the lower guide rail.

[0008] As a further embodiment of the present invention: the upper mold base is rotatably connected to the upper guide rail base, and the upper guide rail base and the upper mold base are coaxially arranged, and the lower guide rail base and the lower mold base are coaxially arranged.

[0009] As a further embodiment of the present invention: a feeding cylinder is installed on one side of the top of the top shell, and a feeding funnel is connected to the bottom surface of the feeding cylinder. The feeding funnel penetrates the top shell and communicates with the top surface of the feeding box, and a control valve is provided in the feeding funnel.

[0010] As a further aspect of the present invention: the discharge system includes a first guide plate connecting one side of the feeding box and the top surface of the machine, a second guide plate being provided on one side of the front of the machine, and a limiting cylinder being provided between the first guide plate and the second guide plate and inside the machine.

[0011] As a further aspect of the present invention: the inner wall of the limiting cylinder is provided with a plurality of first limiting plates and second limiting plates arranged in a plurality of manner, wherein the first limiting plate is composed of a first inclined portion, a first bent portion, a second inclined portion and a second bent portion, and the second limiting plate is composed of a third inclined portion and a third bent portion.

[0012] As a further embodiment of the present invention: an upper guide rail is provided on the top of the upper guide rail seat, and the tails of multiple upward punches are slidably disposed in the upper guide rail.

[0013] As a further embodiment of the present invention: an upper preload wheel and an upper main load wheel are provided inside the connecting protective seat. The upper preload wheel and the upper main load wheel pass through the top of the upper guide rail seat, and the axial surfaces of the upper preload wheel and the upper main load wheel both protrude from the top track surface of the upper guide rail. The upper main load wheel is driven by a rotary motor installed inside the first drive box. A lower preload wheel and a lower main load wheel are provided at the bottom of the lower guide rail seat. The lower preload wheel and the lower main load wheel both pass through the bottom plate of the lower guide rail seat, and the axial surfaces of the lower preload wheel and the lower main load wheel protrude from the bottom track surface of the lower guide rail system. The lower main load wheel is driven by a rotary motor provided on the bottom surface of the lower guide rail seat.

[0014] As a further embodiment of the present invention: the lower guide rail seat is provided with a lower guide rail system, which includes a filling rail section, a tableting rail section and a tablet pushing rail section. The filling rail section is located below the feeding box, the tableting rail section is located at the corresponding positions above the lower pre-compression roller and the lower main compression roller, and the tablet pushing rail section is located near the lower part of the discharge system.

[0015] The beneficial effects of this invention are:

[0016] 1. The present invention provides a self-rotating rack above the pusher section of the lower guide rail seat, and multiple self-rotating teeth are provided at the bottom of the lower punch. When the lower punch moves to the pusher section, the self-rotating teeth on the lower punch mesh with the self-rotating rack, and rotate during the movement of the lower punch. This rotates synchronously with the pusher section to push the lower punch upward, quickly pushing out the formed tablet. This improves efficiency while avoiding stress concentration and damage caused by a single force on the formed tablet, thus increasing the yield and saving resources.

[0017] 2. The present invention further slows down the feeding speed by setting multiple sets of first and second limiting plates to avoid the tablets from impacting each other and causing damage. At the same time, multiple sets of bending are set on the first and second limiting plates to change the feeding direction, so that the contact area between the falling tablets and the first and second limiting plates increases, the number of collisions increases, and vibration is generated to separate the raw material powder adhering to the tablets. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the unfolded circumferential cross-sectional structure of the upper punch, pressing hole, and lower punch of the present invention;

[0021] Figure 3 yes Figure 2 Enlarged structural diagram at point A in the middle;

[0022] Figure 4 This is a schematic diagram of the lower punch structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the material discharge system of the present invention;

[0024] Figure 6 This is a schematic diagram of the internal structure of the limiting cylinder of the present invention.

[0025] In the diagram: 1. Machine base; 2. Top shell; 3. Feeding cylinder; 4. Feeding funnel; 5. First drive box; 6. Connecting protective seat; 7. Upper guide rail seat; 8. Upper mold seat; 9. Middle mold seat; 10. Lower mold seat; 11. Feeding box; 12. Discharge system; 13. Upper punch; 14. Lower guide rail seat; 15. Lower pre-pressure roller; 16. Lower main pressure roller; 17. Lower punch; 18. Spinning rack; 61. Upper pre-pressure roller; 62. Upper main pressure roller; 71. Upper guide rail; 91. Tableting hole; 141. Lower guide rail system; 1411. Filler rail section; 1412. Tableting rail section; 1413. Pushing rail section; 171. Spinning rack; 121. First guide plate; 122. Limiting cylinder; 123. Second guide plate; 1221. First limiting plate; 1222. Second limiting plate. Detailed Implementation

[0026] 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.

[0027] like Figures 1-6 As shown, this is a spin-type tablet press. The tablet press includes a machine base 1 installed at a corresponding position on the production line. A top shell 2 is supported on the top of the machine base 1 by four support rods. A processing cavity is formed between the top shell 2 and the top surface of the machine base 1, and a protective door is provided around the cavity for sealing. A first drive box 5 is located at the top of the processing cavity. A connecting protective seat 6 is connected to the bottom of the first drive box 5. An upper guide rail seat 7 is fixedly connected to the bottom of the connecting protective seat 6. Further, a mounting base and a lower guide rail seat 14 are provided inside the machine base 1 (not shown). The mounting base is located below the lower guide rail seat 14 and connected to the bottom surface of the machine base 1. The lower guide rail seat 14 is fixedly connected to the interior of the machine base 1. A drive motor is installed on the mounting base. The output rod of the drive motor passes through the lower guide rail seat 14 and is connected to the lower mold seat 10. The middle mold seat 9 is connected above the lower mold seat 10 by a connecting column. The upper mold seat 8 is connected to the top of the middle mold seat 9 by a connecting column. The top surface of the upper mold seat 8 is rotatably connected to the upper guide rail seat 7. The upper guide rail seat 7 and the upper mold seat 8 are coaxially arranged. The lower guide rail seat 14 is coaxially arranged with the lower mold seat 10. Furthermore, the lower mold seat 10, the middle mold seat 9 and the upper mold seat 8 are also coaxially arranged. A feeding box 11 is provided on one side of the top of the middle mold seat 9. A discharge system 12 is provided on one side of the feeding box 11. The discharge system 12 passes through the top surface of the machine base 1.

[0028] A feeding cylinder 3 is installed on one side of the top of the top shell 2. The bottom surface of the feeding cylinder 3 is connected to a feeding funnel 4. The feeding funnel 4 passes through the top shell 2 and communicates with the top surface of the feeding box 11. The raw material in the feeding cylinder 3 is fed into the feeding box 11 through the feeding funnel 4 for filling during the tableting process. The feeding funnel 4 is equipped with a control valve for feeding control.

[0029] Further such as Figure 1 and Figure 5 As shown, the discharge system 12 includes a first guide plate 121 connecting one side of the feeding box 11 and the top surface of the machine base 1, a second guide plate 123 is provided on one side of the front of the machine base 1, and a limiting cylinder 122 is provided between the first guide plate 121 and the second guide plate 123 and located inside the machine base 1. The tablets after compression are conveyed to the next section through the discharge system 12.

[0030] Further such as Figure 2As shown, multiple upper punches 13 are provided at the edge of the upper mold base 8. The multiple upper punches 13 are symmetrically distributed around the center of the upper mold base 8. An upper guide rail 71 is provided on the top of the upper guide rail base 7 above the upper mold base 8. The tails of the multiple upper punches 13 are slidably disposed in the upper guide rail 71. As the upper mold base 8 rotates, the multiple upper punches 13 rotate synchronously and slide on the upper guide rail 71, further pushing the upper punches 13 to move up and down in the vertical direction to realize the tablet pressing operation.

[0031] The connecting protective seat 6 is internally equipped with an upper preload roller 61 and an upper main pressure roller 62, which pass through the top of the upper guide rail seat 7 and are located above the upper guide rail 71. Figure 2 As shown, the axial surfaces of the upper preload roller 61 and the upper main pressure roller 62 both protrude from the top track surface of the upper guide rail 71. The upper punch 13 moves to the bottom of the upper preload roller 61 for preload and moves to the bottom of the upper main pressure roller 62 for main pressure. The upper preload roller 61 is rotatably connected inside the connecting protective seat 6, while the upper main pressure roller 62 is driven by a rotary motor inside the first drive box 5. The rotary motor is fixedly installed inside the first drive box 5.

[0032] Further, such as Figure 2As shown, multiple sets of pressing holes 91 are provided at the edge of the middle die base 9, and these multiple sets of pressing holes 91 correspond one-to-one with multiple upper punches 13. The punches of the multiple upper punches 13 are adapted to the corresponding pressing holes 91 to realize the extrusion of raw materials. Multiple lower punches 17 are provided at the edge of the lower die base 10. The multiple lower punches 17 are symmetrically distributed around the center of the lower die base 10. The multiple lower punches 17 also correspond one-to-one with the multiple sets of pressing holes 91 located above. The punches of the lower punches 17 are adapted to the pressing holes 91 to extrude raw materials. Tableting is achieved through the cooperation of the upper punch 13, the tableting hole 91, and the lower punch 17. A lower guide rail system 141 is provided on the lower guide rail seat 14 below the lower die base 10. The tails of multiple lower punches 17 are slidably connected to the lower guide rail system 141. The lower guide rail system 141 includes a filling rail section 1411, a tableting rail section 1412, and a tablet pushing rail section 1413. A lower pre-pressure roller 15 and a lower main pressure roller 16 are provided at the bottom of the lower guide rail seat 14. The lower pre-pressure roller 15 is rotatably mounted on the lower guide rail seat 14. On the base plate, the lower main pressure roller 16 is driven by a rotary motor located on the bottom surface of the lower guide rail seat 14. Both the lower pre-pressure roller 15 and the lower main pressure roller 16 penetrate the base plate of the lower guide rail seat 14. The axial surfaces of the lower pre-pressure roller 15 and the lower main pressure roller 16 protrude from the bottom track surface of the lower guide rail system 141. The filling rail section 1411 is located below the feeding box 11, the tablet pressing rail section 1412 is located above the lower pre-pressure roller 15 and the lower main pressure roller 16 at corresponding positions, and the tablet pushing rail section 1413 is located near... Below the discharge system 12, when the drive motor drives the lower die base 10 to rotate, multiple lower punches 17 will rotate synchronously. When the lower punches 17 pass through the filling rail section 1411, they move upward to cooperate with the feeding box 11 to fill the corresponding tableting hole 91 with raw materials. After moving to the tableting rail section 1412, they perform tableting operation through the lower pre-pressing roller 15 and the lower main pressing roller 16, forming tablets inside the tableting hole 91. Then they move to the tablet pushing rail section 1413 and move upward to push out the formed tablets, completing the tableting operation.

[0033] Further such as Figure 3 and Figure 4 As shown, the lower guide rail seat 14 is provided with a spin rack 18 above the tablet pusher section 1413, and multiple lower punches 17 are provided with spin teeth 171 at their bottoms. When the lower punches 17 move to the tablet pusher section 1413, the spin teeth 171 on the lower punches 17 mesh with the spin rack 18 and rotate during the movement of the lower punches 17. This rotates synchronously with the tablet pusher section 1413 to push the lower punches 17 upward, quickly pushing out the formed tablets. This improves efficiency while avoiding stress concentration and damage caused by a single force on the formed tablets.

[0034] Further such as Figure 6As shown, the inner wall of the limiting cylinder 122 is provided with a first limiting plate 1221 and a second limiting plate 1222. Multiple first limiting plates 1221 and second limiting plates 1222 are arranged on the inner wall of the limiting cylinder 122. The first limiting plate 1221 is composed of a first inclined portion, a first bent portion, a second inclined portion, and a second bent portion, while the second limiting plate 1222 is composed of a third inclined portion and a third bent portion. By setting multiple sets of first limiting plates 1221 and second limiting plates 1222, the feeding speed is further slowed down to avoid the tablets from impacting each other and causing damage. At the same time, multiple sets of bends on the first limiting plates 1221 and second limiting plates 1222 change the feeding direction, so that the contact area between the falling tablets and the first limiting plates 1221 and second limiting plates 1222 increases, the number of collisions increases, and vibration is generated to separate the raw material powder adhering to the tablets. The first limiting plates 1221 and second limiting plates 1222 are made of soft materials and do not damage the tablets when they collide with them.

[0035] When the spin-type tablet press of the present invention is running, the drive motor located inside the machine base 1 drives the lower die holder 10, the middle die holder 9, and the upper die holder 8 to rotate synchronously. The upper die holder 8 then drives multiple upper punches 13 to rotate, and the lower die holder 10 drives multiple lower punches 17 to rotate. The rotating upper punches 13 cooperate with the upper guide rail 71 to achieve vertical movement, and similarly, the rotating lower punches 17 cooperate with the lower guide rail system 141 to achieve vertical movement. One upper punch 13, one tableting hole 91, and one lower punch 17 form a group. When they move to the position of the filling rail section 1411, filling is introduced into the tableting hole 91 through the bottomless feeding box 11. Then, the filling is smoothed by a scraper plate provided on one side of the feeding box 11. Afterwards, the lower punches 17 retract, and the upper punches 13 move downward. The tablet moves to the tableting track section 1412, where it is pre-pressed by the upper pre-pressing roller 61 and the lower pre-pressing roller 15. Then, it is pressed into a tablet by the upper main pressure roller 62 and the lower main pressure roller 16. When it moves to the tablet pushing track section 1413, the lower punch 17 moves upward and the upper punch 13 retracts. Simultaneously, the lower punch 17 engages with the spin rack 18, causing the lower punch 17 to rotate. This gives the pressed tablets radial and axial forces, allowing them to be quickly pushed out. The tablets are blocked by the baffles on the side of the feeding box 11 away from the scraper and discharged into the discharge system 12. In the discharge system 12, the tablets are restricted by the first limiting plate 1221 and the second limiting plate 1222, which slows down the dropping speed and causes the raw material powder to be slowly shaken off.

[0036] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A rotary tablet press, comprising a machine base, a top shell supported on the top of the machine base by four support rods, a processing cavity formed between the top shell and the top surface of the machine base, characterized in that, The top of the processing cavity is provided with a first driving box, the bottom of the first driving box is connected with a connecting protection seat, the bottom of the connecting protection seat is connected with an upper guide rail seat, the inside of the machine table is provided with a mounting base and a lower guide rail seat, the lower guide rail seat is fixedly connected with the inside of the machine table, the mounting base is provided with a driving motor, the output rod of the driving motor penetrates through the lower guide rail seat and is connected with a lower die seat, the upper part of the lower die seat is provided with a middle die seat and an upper die seat, the lower die seat, the middle die seat and the upper die seat are coaxially connected through connecting columns, one side of the top of the middle die seat is provided with a feeding box, one side of the feeding box is provided with a discharging system. A plurality of upper punches are arranged at the edge of the upper die seat, a plurality of groups of tablet pressing holes are arranged at the edge of the middle die seat, a plurality of lower punches are arranged at the edge of the lower die seat, the upper punch, the tablet pressing hole and the lower punch are one-to-one corresponding, and the bottom of the lower punch is provided with a self-rotating tooth, a self-rotating rack is arranged in the lower guide rail seat, and the self-rotating tooth of the lower punch is engaged with the self-rotating rack at the tablet pushing rail section of the lower guide rail seat. The inside of the connecting protection seat is provided with an upper pre-pressing wheel and an upper main pressing wheel, the upper pre-pressing wheel and the upper main pressing wheel are arranged through the top of the upper guide rail seat, and the shaft faces of the upper pre-pressing wheel and the upper main pressing wheel protrude from the top rail face of the upper guide rail, the upper main pressing wheel is driven by the rotating motor arranged in the first driving box, the bottom of the lower guide rail seat is provided with a lower pre-pressing wheel and a lower main pressing wheel, the lower pre-pressing wheel and the lower main pressing wheel are arranged through the bottom plate of the lower guide rail seat, and the shaft faces of the lower pre-pressing wheel and the lower main pressing wheel protrude from the bottom rail face of the lower guide rail system, and the lower main pressing wheel is driven by the rotating motor arranged on the bottom surface of the lower guide rail seat. The lower guide rail seat is provided with a lower guide rail system, the lower guide rail system comprises a filling rail section, a tablet pressing rail section and a tablet pushing rail section, the filling rail section is located below the feeding box, the tablet pressing rail section is located above the lower pre-pressing wheel and the lower main pressing wheel, and the tablet pushing rail section is located below the discharging system.

2. A rotary tablet press according to claim 1, characterized in that The upper die seat is rotationally connected with the upper guide rail seat, the upper guide rail seat is coaxially arranged with the upper die seat, and the lower guide rail seat is coaxially arranged with the lower die seat.

3. A rotary tablet press according to claim 1, wherein One side of the top of the top shell is provided with a feeding cylinder, the bottom surface of the feeding cylinder is connected with a feeding hopper, the feeding hopper penetrates through the top shell and communicates with the top surface of the feeding box, and the feeding hopper is provided with a control valve.

4. A rotary tablet press according to claim 1, wherein The discharging system comprises a first guide plate connected with one side of the feeding box and the top surface of the machine table, a second guide plate is arranged on one side of the front surface of the machine table, a limiting cylinder is arranged between the first guide plate and the second guide plate and in the inside of the machine table.

5. A rotary tablet press according to claim 4, wherein The inner wall of the limiting cylinder is provided with a plurality of first limiting plates and second limiting plates arranged and distributed, wherein the first limiting plate is composed of a first inclined part, a first bent part, a second inclined part and a second bent part, and the second limiting plate is composed of a third inclined part and a third bent part.

6. A rotary tablet press according to claim 2, wherein The top of the upper guide rail seat is provided with an upper guide rail, and the tail parts of the plurality of upper punches are slidingly arranged in the upper guide rail.

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