Large-diameter punch structure on a rotary tablet press

Abstract

The application discloses a large-diameter punch rod structure on a rotary tablet press, and relates to the technical field of tablet press equipment. The large-diameter punch rod structure comprises a punch body, a punch head and a punch tail. One end of the punch head is a stamping plane, and the other end is detachably connected with the punch body. The punch tail comprises a punch tail rod body. One end of the punch tail rod body is provided with a sliding head, and the other end is detachably connected with the punch body. The sliding head is used for sliding in a track. The sliding head is provided with a wear-resistant ring close to one end of the punch tail rod body. The wear-resistant ring is sleeved on the punch tail rod body and detachably connected with the punch tail. The wear-resistant ring can rotate around the axis of the punch tail rod body. The application has the effect of improving the problem that the punch rod needs to be frequently replaced due to wear of the punch tail, thereby increasing the purchasing cost of enterprises.

Description

Technical Field

[0001] This application relates to the technical field of tableting equipment, and in particular to a large-diameter punch structure on a rotary tablet press. Background Technology

[0002] A rotary tablet press is a dual-pressure automatic rotating, continuous tableting machine used to compress granular or powdered raw materials into tablets, mainly used in the pharmaceutical industry for tablet production.

[0003] The upper part of the rotary tablet press is the tableting structure, mainly composed of three parts: the upper punch, the middle die, and the lower punch. Both the upper and lower punches are equipped with several punch rods, which are further divided into punch heads and punch tails. During the tableting process, the upper punch rod located on the upper punch and the lower punch rod located on the lower punch rotate simultaneously, while the upper and lower punch tails slide along their respective tracks, causing the upper and lower punch heads to move towards each other, thus completing the vertical displacement. The upper and lower punch rods work together to compress the granular or powdered raw material within the middle die hole, ultimately producing tablets.

[0004] During prolonged operation, the tail of the punch rod will experience varying degrees of wear due to continuous sliding contact with the track. In severe cases, this can lead to the complete scrapping of the punch rod, requiring the replacement of the entire punch rod with severely worn tails. However, the body of the punch rod is not easily damaged. Frequent replacements due to tail wear can easily result in material waste and increase the company's procurement costs. Summary of the Invention

[0005] To improve the efficiency of reducing enterprise procurement costs by minimizing the need for frequent punch replacements due to wear on the punch tail, this application provides a large-diameter punch structure for a rotary tablet press.

[0006] This application provides a large-diameter punch structure for a rotary tablet press, employing the following technical solution: A large-diameter punch structure for a rotary tablet press includes a punch body, a punch head, and a punch tail. One end of the punch head is a punching plane, and the other end is detachably connected to the punch body. The punch includes a punch rod body, one end of which is provided with a sliding head, and the other end is detachably connected to the punch body. The sliding head is used to slide within the track. A wear-resistant ring is provided at one end of the sliding head near the punch rod body. The wear-resistant ring is sleeved on the outside of the punch rod body and detachably connected to the punch. The wear-resistant ring can rotate around the axis of the punch rod body.

[0007] By adopting the above technical solution, the entire punch rod is divided into three parts: punch body, punch head, and punch tail. When the punch head or punch tail shows severe wear, it is not necessary to scrap the entire punch rod. The punch head or punch tail can be replaced separately as needed, reducing material waste and saving enterprise procurement costs. In addition, a wear-resistant ring can be detachably connected to the punch tail rod body. The wear-resistant ring can be made of a more wear-resistant material. During use, the wear-resistant ring slides together with the sliding head in the track. The wear-resistant ring can be replaced separately after it wears out. The wear-resistant ring can also rotate relative to the punch tail rod body, so that the wear of the wear-resistant ring can be more even, instead of wearing out in the same place, which can improve the service life of the wear-resistant ring.

[0008] Optionally, the wear-resistant ring includes a ring body, on which an inner ring is coaxially rotatably connected, and the inner ring is detachably connected to the punch tail.

[0009] By adopting the above technical solution, the wear-resistant ring includes a ring body, an inner ring coaxially rotatably connected to the ring body, and the inner ring is detachably connected to the punch tail, so that the ring body of the wear-resistant ring can rotate relative to the punch tail rod body. During use, the wear-resistant ring wears more evenly, thereby improving the service life of the wear-resistant ring.

[0010] Optionally, a connecting rod is provided at one end of the punch rod near the punch body, and a first connecting hole is provided at one end of the punch body near the punch rod. The connecting rod is inserted into or detachably snapped into the first connecting hole. A first fixing hole is provided on the side wall of the first connecting hole, and a second fixing hole is provided on the side wall of the connecting rod. The large-diameter punch structure on the rotary tablet press also includes a first locking member, which can be simultaneously inserted into the first fixing hole and the second fixing hole.

[0011] By adopting the above technical solution, the tail rod can be inserted into the punch body through the connecting rod, and then simultaneously inserted into the first fixing hole and the second fixing hole by the first locking member, so that the tail rod and the punch body can be detachably connected; or, the tail rod can be directly and detachably snapped into the punch body through the connecting rod, and then reinforced by the first locking member, so that the connection between the tail rod and the punch body is more stable.

[0012] Optionally, the end of the punch rod near the punch body is provided with a second connecting hole, the connecting rod is inserted into the second connecting hole, the side wall of the second connecting hole is provided with a third fixing hole, and the side wall of the connecting rod located in the third fixing hole is provided with a fourth fixing hole. The large-diameter punch rod structure on the rotary tablet press also includes a second locking member, which can be simultaneously inserted into the third fixing hole and the fourth fixing hole.

[0013] By adopting the above technical solution, the tail punch and the connecting rod are also detachable. If the tail punch or the sliding head is worn, the tail punch or the sliding head can be replaced separately. The connecting rod is inserted into the tail punch through the second connecting hole. At the same time, the tail punch and the connecting hole are provided with corresponding third and fourth fixing holes. When the tail punch is rotated until the third and fourth fixing holes are aligned, the second locking member is inserted into the third and fourth fixing holes at the same time, so that the tail punch and the connecting rod are fixed.

[0014] Optionally, the outer wall of the punch body may also be detachably connected with a guide key, the length direction of which is along the length direction of the punch body.

[0015] By adopting the above technical solution, a guide key is provided on the outer wall of the punch body, and the length direction of the guide key is along the length direction of the punch body. When the punch rod moves vertically up and down in the tablet press along the track, the guide key can move along the vertical sliding groove opened on the corresponding rotary tablet press, making the operation of the punch rod more stable.

[0016] Optionally, a connecting boss is provided at one end of the punch body near the punch head, the outer diameter of the connecting boss is smaller than the outer diameter of the punch body, and a connecting ring is connected to the outside of the end of the punch head away from the stamping plane, the connecting ring being detachably connected to the connecting boss.

[0017] By adopting the above technical solution, a connecting boss is provided at the end of the punch body near the punch head, and a connecting ring is externally connected at the end of the punch head away from the stamping plane. The connecting ring and the connecting boss are detachably connected, thereby realizing the detachable connection between the punch head and the punch body.

[0018] Optionally, the punch includes a connecting post at one end, which passes through the connecting ring. A limit ring is provided on the inner wall of the end of the connecting ring away from the punch body. A stop member is connected to the side wall of the connecting post. The end of the stop member away from the stamping plane is used to abut against the end face of the limit ring. A coaxial fixing ring groove is opened on the side wall of the connecting post. The stop member is inserted into the fixing ring groove and can move along the fixing ring groove.

[0019] By adopting the above technical solution, a stop is connected to the side wall of the connecting column. After the punch is inserted into the connecting ring, the end of the stop near the stamping plane abuts against the end face of the limiting ring at one end of the connecting ring, so that the punch is restricted in the connecting ring. A coaxial fixing ring groove is opened on the side wall of the connecting column. The stop is inserted into the fixing ring groove and can move along the fixing ring groove, so that the punch can rotate relative to the connecting ring. When the stamping plane is an irregular plane, the angle of the stamping plane can be adjusted by rotating the punch, so that the stamping plane fits the middle die hole better.

[0020] Optionally, the connecting ring has a positioning hole on its side wall, and a third locking member is inserted or threaded into the positioning hole. The third locking member is used to abut against the stop member or is inserted into the groove of the fixing ring.

[0021] By adopting the above technical solution, a positioning hole is opened on the side wall of the connecting ring, and a third locking member is inserted or threaded into the positioning hole. The third locking member can stop the punch from rotating relative to the connecting ring by pressing against the stop member. The third locking member can also be directly inserted into the groove of the fixed ring to fix the angle of the punch rotation.

[0022] Optionally, a weight-reducing through hole is provided inside the punch body, and the opening axis of the weight-reducing through hole coincides with the axis of the punch body.

[0023] By adopting the above technical solution, a weight-reducing through hole is opened inside the punch body. The size of the weight-reducing through hole can be opened according to the actual size of the punch body. Opening the weight-reducing through hole can effectively save material costs and also control the weight of the punch rod.

[0024] Optionally, the stamping plane is provided with a top material block, one end of which slides inside the punch, and the end face of the top material block away from the punch can extend beyond the stamping plane. A sliding groove for the top material block to move is provided on the stamping plane, and an elastic element is provided in the sliding groove. One end of the elastic element is fixed to the inner wall of the punch, and the other end is fixed to the top material block.

[0025] By adopting the above technical solution, a top material block is provided at one end of the punch on the stamping plane. One end of the top material block slides inside the punch, and the other end extends out of the stamping plane. An elastic element is also provided between the top material block and the slide groove. When the pressed tablets stick to the stamping plane, the elastic element can push the top material block to push the tablets away from the stamping plane, effectively reducing the situation where the tablets stick to the punch.

[0026] In summary, this application includes at least one of the following beneficial effects: 1. The punch tail, punch body and punch head are all detachable, so that when the punch tail or punch head is worn or broken, the punch tail or punch head can be replaced separately, which effectively saves material costs; 2. The wear-resistant ring and the punch tail are detachably connected, which allows the wear-resistant ring to be replaced separately. The outer ring of the wear-resistant ring can rotate relative to the inner ring, resulting in more uniform wear and a longer service life. 3. The punching plane of the punch is equipped with a top material block. Under the action of the elastic element, the top material block removes the tablets that are stuck to the punch, effectively reducing the phenomenon of tablets sticking to the punch. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application; Figure 2 This is a cross-sectional schematic diagram illustrating the internal structure of the punch in Embodiment 1 of this application; Figure 3 This is a schematic diagram of the overall structure of the punch body and the punch tail shown in Embodiment 1 of this application; Figure 4 This is a cross-sectional schematic diagram of the internal structure of the punch body and the punch tail, as shown in Embodiment 1 of this application; Figure 5 yes Figure 4 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of the overall structure of the punch body and punch head shown in Embodiment 1 of this application; Figure 7 This is a cross-sectional schematic diagram of the internal structure of the punch body and punch head shown in Embodiment 1 of this application; Figure 8 This is a partial cross-sectional schematic diagram illustrating the wear-resistant ring fixing structure in Embodiment 2 of this application; Figure 9 This is a partial structural schematic diagram of the top block shown in Embodiment 3 of this application; Figure 10 This is a partial cross-sectional schematic diagram illustrating the sliding structure of the top block in Embodiment 3 of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Punch; 11. Punching plane; 12. Connecting post; 121. Fixing ring groove; 122. Stop; 13. Slide groove; 2. Punch body; 21. First connecting hole; 22. First fixing hole; 23. First locking element; 24. Connecting boss; 25. Weight reduction through hole; 26. Guide key; 3. Punch tail; 31. Punch tail rod; 311. Third fixing hole; 312. Second locking element; 313. Third keyway; 32. Slide groove 321. Head shifting; 33. Fixing groove; 33. Connecting rod; 331. Fourth fixing hole; 332. Second fixing hole; 34. Second connecting hole; 4. Wear-resistant ring; 41. Ring body; 42. Ring groove; 43. Mounting groove; 44. Second keyway; 5. Connecting ring; 51. Positioning hole; 52. Third locking element; 53. Limiting ring; 6. Fixing key; 7. Ejector block; 8. Elastic element; 9. Inner ring; 91. Protruding ring; 92. Protrusion; 93. First keyway. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-10 This application will be described in further detail.

[0030] Example 1: This application discloses a large-diameter punch structure for a rotary tablet press in Embodiment 1, referring to... Figure 1 and Figure 2A large-diameter punch structure for a rotary tablet press includes a punch head 1, a punch body 2, and a punch tail 3, wherein the punch head 1 and the punch tail 3 are detachably connected to the punch body 2. The punch body 2 is cylindrical in shape, with a first connecting hole 21 at one end. The axis of the first connecting hole 21 coincides with the axis of the punch body 2. Two first fixing holes 22 are formed on the side wall of the punch body 2 at the location of the first connecting hole 21. A first locking member 23, which can be a spring pin, is inserted into the first fixing hole 22. The spring pin is a cylindrical pin with an opening. After the spring pin is inserted into the first fixing hole 22, it can use its own elastic deformation force to press the spring pin against the first fixing hole 22. The first locking member 23 cooperates with the first fixing hole 22 for the detachable connection between the punch body 2 and the punch tail 3. A connecting boss 24 is integrally formed at the end of the punch body 2 away from the first connecting hole 21. The axis of the connecting boss 24 also coincides with the axis of the punch body 2.

[0031] The punch body 2 has a through-hole 25 for weight reduction. The diameter of the through-hole 25 is smaller than that of the first connecting hole 21, and the axis of the through-hole 25 is coaxial with the axis of the punch body 2. The diameter of the through-hole 25 can be adjusted according to the actual diameter of the punch body 2 to meet the weight reduction requirements of punch bodies 2 with different diameters. A guide key 26 is also fixed to the outer wall of the punch body 2 by bolts. The guide key 26 is set along the length of the punch body 2. When the punch rod moves vertically up and down along the track in the tablet press, the guide key 26 can move along the vertical sliding groove opened on the rotary tablet press, making the operation of the punch rod more stable.

[0032] Reference Figure 3 and Figure 4 The punch 3 includes a punch rod body 31, a sliding head 32, and a connecting rod 33. One end of the punch rod body 31 is integrally formed with the sliding head 32, and the other end has a second connecting hole 34. The diameter of the connecting rod 33 near the punch rod body 31 is slightly smaller than the inner diameter of the second connecting hole 34, and the diameter of the connecting rod 33 away from the punch rod body 31 is slightly smaller than the inner diameter of the first connecting hole 21. One end of the connecting rod 33 is engaged in the second connecting hole 34, realizing a detachable connection between the connecting rod 33 and the punch rod body 31. A third fixing hole 311 is opened on the side wall of the punch rod body 31 near the connecting rod 33. A fourth fixing hole 331 is correspondingly opened on the rod body of the connecting rod 33 inserted into the second connecting hole 34. A second locking member 312 passes through the third fixing hole 311. The second locking member 312 can also be a spring pin.

[0033] Rotate the connecting rod 33 so that the third fixing hole 311 and the fourth fixing hole 331 coincide. At this time, insert one end of the second locking member 312 from the third fixing hole 311 into the fourth fixing hole 331, thereby making the connection between the punch tail rod body 31 and the connecting rod 33 more stable. Since the diameters of the punch tail rod body 31 and the connecting rod 33 are both smaller than the diameter of the punch body 2, if the downward pressure is too great, the punch tail rod body 31 or the connecting rod 33 may easily break. Therefore, the detachable connection between the punch tail rod body 31 and the connecting rod 33 can be used to replace the punch tail rod body 31 or the connecting rod 33 separately, effectively reducing material waste. In other embodiments of this application, the connecting rod 33 and the punch tail rod body 31 are in the form of a plug-in connection. The connecting rod 33 is plugged into the second connecting hole 34, and then the second locking member 312 passes through the third fixing hole 311 and the fourth fixing hole 331, realizing the detachable connection between the connecting rod 33 and the punch tail rod body 31.

[0034] Reference Figure 3 and Figure 4 A second fixing hole 332 is provided on the side wall of the end of the connecting rod 33 away from the end of the punch rod 31. After the connecting rod 33 is combined with the end of the punch rod 31, the end of the connecting rod 33 away from the end of the punch rod 31 is inserted into the first connecting hole 21 of the punch body 2. At this time, the end of the punch rod 31 is rotated until the first fixing hole 22 and the second fixing hole 332 coincide. Then, the first locking member 23 extends out from the first fixing hole 22 and is inserted into the second fixing hole 332, thereby fixing the connecting rod 33 and the punch body 2, realizing the detachable connection between the end of the punch 3 and the punch body 2. In other embodiments of this application, the connecting rod 33 can be directly snapped into the first connecting hole 21 of the punch body 2 to realize the detachable connection between the end of the punch 3 and the punch body 2. The first locking member 23 passes through the first fixing hole 22 and the second fixing hole 332, making the connection between the end of the punch 3 and the punch body 2 more stable.

[0035] Reference Figure 3 and Figure 5A wear-resistant ring 4 is fitted onto the end of the punch rod 31 near the sliding head 32. The wear-resistant ring 4 includes a ring body 41, with an inner ring 9 rotatably connected to the end of the ring body 41 near the sliding head 32. A protruding ring 91 is fixed to the end of the inner ring 9 near the ring body 41. An annular groove 42 matching the protruding ring 91 is formed inside the ring body 41. Both the protruding ring 91 and the annular groove 42 are coaxial with the axis of the punch rod 31. The inner ring 9 is engaged in the annular groove 42 of the ring body 41 by the protruding ring 91, enabling the ring body 41 to rotate relative to the inner ring 9 along the axis of the punch rod 31. A protrusion 92 is fixed to the end of the inner ring 9 away from the protruding ring 91. A fixing groove 321 is formed on the sliding head 32 corresponding to the position of the protrusion 92. The protrusion 92 is detachably engaged in the fixing groove 321, so that the inner ring 9 is fixed on the sliding head 32. The protrusion 92 and the fixing groove 321 are interference-fitted, and the protruding ring 91 and the ring groove 42 are clearance-fitted, so that the inner ring 9 is fixed relative to the sliding head 32, while the ring body 41 can rotate slightly relative to the inner ring 9. In this application, the protrusion 92 can be elastic, thereby facilitating the connection between the protrusion 92 and the sliding head 32.

[0036] Both the sliding head 32 and the ring 41 of the wear-resistant ring 4 slide within the track of the rotary tablet press. The part of the ring 41 that contacts the track is set as an inclined surface, which makes the ring 41 fit more closely to the track surface, increases the contact area between the ring 41 and the track surface, reduces the pressure on the surface of the ring 41 when it is pressed, thereby reducing the wear of the ring 41 and extending the service life of the wear-resistant ring 4.

[0037] The sliding head 32 and the outer ring are in direct contact with the track. The sliding head 32, together with the tail rod body 31, is detachably connected to the punch body 2. The wear-resistant ring 4 is also detachably connected to the sliding head 32. When the sliding head 32 or the outer ring is severely worn, the sliding head 32 or the wear-resistant ring 4 can be replaced separately without scrapping the entire punch rod, effectively saving material costs. At the same time, the outer ring of the wear-resistant ring 4 can rotate relative to the inner ring 9. When the wear-resistant ring 4 slides inside the track, due to the friction between the outer ring surface and the track surface, the outer ring rotates slightly relative to the inner ring 9. The outer ring rotates while being worn inside the track, which makes the wear on the outer ring surface more uniform and effectively improves the service life of the wear-resistant ring 4.

[0038] Reference Figure 6 and Figure 7 The punch 1 is detachably connected to the end of the punch body 2 away from the punch tail 3. The end of the punch 1 away from the punch body 2 is a stamping plane 11, which is used to contact the powdered agent and compress the powdered agent. A connecting post 12 is fixed to the end of the punch 1 away from the stamping plane 11. The outer diameter of the connecting post 12 is larger than the outer diameter of the punch 1. A connecting ring 5 is sleeved on the connecting post 12. The inner diameter of the connecting ring 5 is slightly larger than the outer diameter of the connecting post 12. The end of the connecting ring 5 away from the punch 1 is threadedly connected and fixed to the connecting boss 24. A limit ring 53 is integrally formed at the end of the connecting ring 5 near the punch 1.

[0039] A fixing ring groove 121 is provided on the side wall of the connecting column 12, and a stop 122 is fitted into the fixing ring groove 121. The stop 122 is an open annular structure, and the outer diameter of the stop 122 is larger than the inner diameter of the limiting ring 53. The end of the stop 122 near the stamping plane 11 abuts against the end face of the limiting ring 53. A positioning hole 51 is provided on the side wall of the connecting ring 5 corresponding to the position of the stop 122. A third locking member 52 passes through the positioning hole 51. The third locking member 52 can be a cylindrical pin with external threads, and the third locking member 52 is threadedly connected to the positioning hole 51. In other embodiments of this application, the stop 122 can also be a separate, arc-shaped stop block, placed corresponding to the position of the third locking member 52, for fixing the punch 1.

[0040] Reference Figure 6 and Figure 7 When the stamping plane 11 of the punch 1 is an irregularly shaped plane, the third locking member 52 can be placed in a position where it is not tightly against the stop member 122. At this time, the angle of the stamping plane 11 can be manually rotated and adjusted so that the shape of the stamping plane 11 corresponds to the shape of the die hole. When it is necessary to fix the punch 1, first, put the stop member 122 into the fixing ring groove 121 of the connecting post 12, then set one end of the stamping plane 11 of the punch 1, and insert the punch 1 into the connecting ring 5 from the end of the connecting ring 5 near the punch body 2. After the stop member 122 contacts the inner wall of the connecting ring 5, tighten the third locking member 52 into the connecting ring 5, so that the third locking member 52 abuts the stop member 122 in the fixing ring groove 121, thereby fixing the punch 1. The steps for disassembling the punch 1 are the reverse of the steps for fixing the punch 1, and will not be described here.

[0041] The implementation principle of the large-diameter punch structure on a rotary tablet press according to the embodiments of this application is as follows: the punch tail 3 is detachably connected to the punch body 2 through the connecting rod 33, and the punch tail rod body 31 is also detachably connected to the connecting rod 33. The punch head 1 is detachably connected to the punch body 2 through the connecting ring 5. When the punch tail 3 or the punch head 1 is worn or broken, the punch tail 3 or the punch head 1 can be replaced separately, which effectively saves material costs. At the same time, the wear-resistant ring 4 is also detachably connected to the punch tail 3, so that the wear-resistant ring 4 can also be replaced separately. Moreover, the ring body 41 can rotate slightly relative to the inner ring 9, so that the wear of the ring body 41 is more uniform, effectively extending the service life of the wear-resistant ring 4.

[0042] Example 2: The difference between Example 2 and Example 1 is that: (Refer to...) Figure 8The ring body 41 has an installation groove 43 for installing the inner ring 9. The ring body 41 and the inner ring 9 are clearance-fitted. The inner wall of the inner ring 9 has several first keyways 93 along the circumferential direction. The ring body 41 has a second keyway 44 corresponding to the position of the first keyway 93. At the same time, the tail rod body 31 has a third keyway 313 corresponding to the position of the first keyway 93. A fixing key 6 is embedded in the third keyway 313. When installing the ring body 41, the fixing key 6 is first snapped into the third keyway 313. The ring body 41 is rotated so that the positions of the first keyway 93 and the second keyway 44 are aligned. At this time, the first keyway 93 and the second keyway 44 are connected, so that the fixing key 6 can pass through them, thereby snapping the fixing key 6 into the first keyway 93. The fixing key 6 is simultaneously engaged in the first keyway 93 and the third keyway 313, and the fixing key 6 is also interference-fitted with the first keyway 93 and the third keyway 313, so that the inner ring 9 is fixed on the punch tail rod body 31, realizing the detachable connection between the wear-resistant ring 4 and the punch tail 3. At this time, the ring body 41 can also rotate relative to the inner ring 9, so that the outer wall of the ring body 41 is worn more evenly.

[0043] Example 3: The difference between Example 3 and Example 1 is that: (Refer to...) Figure 9 and Figure 10 A pusher block 7 is slidably connected to one end of the punch 1 near the stamping plane 11. The pusher block 7 is cross-shaped and arranged parallel to the stamping plane 11. A groove 13 corresponding to the shape of the pusher block 7 is formed on the stamping plane 11. One end of the pusher block 7 slides in the groove 13, and the other end extends out of the stamping plane 11. An elastic element 8 is also fixed in the groove 13. The elastic element 8 can be a compression spring. One end of the elastic element 8 is fixed to the inner wall of the groove 13 away from the stamping plane 11, and the other end is fixed to the pusher block 7. In other embodiments of this application, the shape of the pusher block 7 can also be a grid, or the installation position of the pusher block 7 can be set along the outer periphery of the stamping plane 11, as long as it can push the tablet away from the stamping plane 11.

[0044] When the punch 1 presses the medicine, the top material block 7 is pressed into the groove 13. At this time, the end face of the top material block 7 away from the elastic element 8 is flush with the stamping plane 11. The stamping plane 11 and the top material block 7 together press the powdered medicine, and the elastic element 8 is compressed. When the punch 1 retracts, the compressed elastic element 8 pushes the top material block 7 out along the groove 13, thereby removing the tablets that are stuck to the stamping plane 11 and reducing the situation where the pressed tablets stick to the punch 1.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A large-diameter punch structure for a rotary tablet press, characterized in that: It includes a punch body (2), a punch head (1) and a punch tail (3), wherein one end of the punch head (1) is a stamping plane (11) and the other end is detachably connected to the punch body (2); The punch tail (3) includes a punch tail rod body (31), one end of which is provided with a sliding head (32), and the other end is detachably connected to the punch body (2). The sliding head (32) is used to slide within the track. A wear-resistant ring (4) is provided at one end of the sliding head (32) near the punch tail rod body (31). The wear-resistant ring (4) is sleeved on the outside of the punch tail rod body (31) and detachably connected to the punch tail (3). The wear-resistant ring (4) can rotate around the axis of the punch tail rod body (31). The wear-resistant ring (4) includes a ring body (41), on which an inner ring (9) is rotatably connected on the ring body (41), and the inner ring (9) is detachably connected to the punch tail (3); The punch body (2) is provided with a connecting boss (24) at one end near the punch head (1). The outer diameter of the connecting boss (24) is smaller than the outer diameter of the punch body (2). A connecting ring (5) is connected to the outside of the punch head (1) away from the stamping plane (11). The connecting ring (5) is detachably connected to the connecting boss (24). The punch (1) includes a connecting post (12) at one end, which passes through the connecting ring (5). A limit ring (53) is provided on the inner wall of the end of the connecting ring (5) away from the punch body (2). A stop (122) is connected to the side wall of the connecting post (12). The end of the stop (122) near the stamping plane (11) is used to abut against the end face of the limit ring (53). The side wall of the connecting column (12) is provided with a coaxial fixing ring groove (121). The stop (122) is inserted into the fixing ring groove (121) and can move along the fixing ring groove (121), so that the punch (1) can rotate relative to the connecting ring (5). The connecting ring (5) has a positioning hole (51) on its side wall. A third locking member (52) is threaded into the positioning hole (51). The third locking member (52) is used to abut against the stop member (122).

2. The large-diameter punch structure for a rotary tablet press according to claim 1, characterized in that: A connecting rod (33) is provided at one end of the punch body (2) near the punch body (2), and a first connecting hole (21) is provided at one end of the punch body (2) near the punch body (31). The connecting rod (33) is inserted into the first connecting hole (21). The first connecting hole (21) has a first fixing hole (22) on its side wall, and the connecting rod (33) has a second fixing hole (332) on its side wall. The large-diameter punch structure of the rotary tablet press also includes a first locking member (23). The first locking member (23) can be simultaneously inserted into the first fixing hole (22) and the second fixing hole (332).

3. The large-diameter punch structure for a rotary tablet press according to claim 2, characterized in that: The punch tail rod (31) has a second connecting hole (34) at one end near the punch body (2). The connecting rod (33) is inserted into the second connecting hole (34). The side wall of the second connecting hole (34) has a third fixing hole (311). The side wall of the connecting rod (33) located in the second connecting hole (34) has a fourth fixing hole (331). The large diameter punch structure on the rotary tablet press also includes a second locking member (312). The second locking member (312) can be inserted into the third fixing hole (311) and the fourth fixing hole (331) at the same time.

4. The large-diameter punch structure for a rotary tablet press according to claim 1, characterized in that: The outer wall of the punch (2) can also be detachably connected with a guide key (26), the guide key (26) being along the length direction of the punch (2).

5. The large-diameter punch structure for a rotary tablet press according to claim 1, characterized in that: The punch body (2) has a weight reduction through hole (25) inside, and the opening axis of the weight reduction through hole (25) coincides with the axis of the punch body (2).

6. The large-diameter punch structure for a rotary tablet press according to claim 1, characterized in that: The stamping plane (11) is provided with a top material block (7). One end of the top material block (7) slides inside the punch (1). The end face of the top material block (7) away from the punch (1) can extend beyond the stamping plane (11). A sliding groove (13) for the top material block (7) to move is provided on the stamping plane (11). An elastic element (8) is provided in the sliding groove (13). One end of the elastic element (8) is fixed to the inner wall of the punch (1), and the other end is fixed to the top material block (7).

Images