A tablet pressing machine for pharmaceutical tablets

Abstract

The invention relates to the technical field of tablet presses, and discloses a tablet press for pharmaceutical tablets, comprising a support frame, wherein a middle die is arranged on the support frame, and an upper die and a lower die are slidably arranged on the support frame at upper and lower sides of the middle die, respectively; the upper die and the lower die are both provided with tablet pressing components for tablet pressing; the upper die is provided with a pre-pressing component for pre-pressing the tablet and a feeding component for ejecting the tablet out of the middle die; the lower die is provided with a screening component corresponding to the feeding component; the middle die comprises a positioning table, a rotating table which rotates with the movement of the upper die is provided in the positioning table, and a tablet pressing cavity is provided on the rotating table. Compared with the prior art, the invention has the following beneficial effects: the upper die and the lower die are synchronously close to the middle die, so as to avoid the tablets from being broken during the tablet pressing process; the pre-pressing component pre-presses the medicine powder, so as to avoid the flying powder during the compaction process, so as to prevent the tablet press and the tablets from being polluted, and to improve the production quality of the finished tablets.

Description

Technical Field

[0001] The invention relates to the technical field of tablet presses, in particular to a tablet press for pharmaceutical tablets. Background Art

[0002] A tablet press is a device used to make tablets. It uses pressure to press drug raw material powder or granules into tablets of fixed shape and size. This device is usually used in the pharmaceutical industry to improve the efficiency and quality of drug production and can produce tablets of different specifications and shapes.

[0003] The existing pharmaceutical tablet press usually includes a transmission part, a punching plate part, a pressing wheel part, a track part, a lubrication part and the like. When in use, the upper punch is loaded into the upper punch, the middle punch is loaded into the middle punch die, and the lower punch is loaded into the lower punch. The transmission part drives the punching plate to rotate, and the upper and lower punches make regular up and down movements along the fixed track. When the upper punch and the lower punch rotate with the punching plate and pass through the pressing wheel, they are pushed by the pressing wheel, so that the upper punch applies pressure downward to the medicine powder to form the medicine powder. After that, the lower punch moves upward to push out and collect the formed tablets. When the pharmaceutical tablet press with this structure is in use, the tablets are subjected to different impact forces from the upper punch and the lower punch during the forming process, which causes the tablets to be easily broken during the tableting operation, thereby reducing the quality of the finished tablets. At the same time, since the medicine powder is in a relatively loose state when the upper punch presses the medicine powder, it is easy to produce flying powder during the pressing process, which causes pollution to the tablet press and the tablets, and further reduces the production quality of the tablets. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the above difficulties and provide a pharmaceutical tablet press.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is as follows: a pharmaceutical tablet press comprises a support frame, a middle die is arranged on the support frame, an upper die and a lower die are slidably arranged on the support frame at the upper and lower sides of the middle die respectively, a tablet pressing assembly for tabletting the tablets is arranged on the upper die and the lower die is provided with a pre-pressing assembly for pre-pressing the tablets and a feeding assembly for ejecting the tablets from the middle die, a screening assembly corresponding to the feeding assembly is arranged on the lower die, a connecting rod is rotatably arranged on the support frame, a lower driving rod and an upper driving rod are rotatably arranged at both ends of the connecting rod, the lower driving rod is rotatably connected to the lower die, and the upper driving rod is rotatably connected to the upper die, a supporting frame is arranged on the support frame, a driving motor is arranged on the supporting frame, a transmission rod is arranged at the output end of the driving motor, a driving block is arranged on the upper die, a driving slider is slidably arranged in the driving block, a fixed column is eccentrically arranged on the driving slider, and the fixed column is rotatably connected to the transmission rod, the middle die comprises a positioning table, a rotating table is rotatably arranged in the positioning table and rotates with the movement of the upper die, and a tablet pressing cavity is arranged on the rotating table.

[0006] As an improvement, a linkage column is provided on the rotating table, and a linkage oblique groove and a linkage longitudinal groove which are interconnected are provided on the linkage column. A linkage sleeve is provided at the lower end of the upper mold, and a positioning sleeve is provided in the linkage sleeve. A positioning slide is provided slidingly in the positioning sleeve, and a positioning slide column extending from the positioning sleeve is provided on the positioning slide column. The positioning slide column slides in cooperation with the linkage oblique groove and the linkage longitudinal groove, and a positioning spring connected to the positioning slide is provided in the positioning sleeve.

[0007] As an improvement, the tablet pressing assembly includes a tablet pressing bracket, a tablet pressing sleeve is slidably provided on the tablet pressing bracket, a tablet pressing rod slidably connected to the tablet pressing cavity is provided in the tablet pressing sleeve, a fixing groove is provided on the tablet pressing bracket, a fixing block slidably connected to the fixing groove is provided on the tablet pressing sleeve, an adjusting stud is provided at the lower end of the tablet pressing sleeve, a fixed sleeve is provided on the tablet pressing bracket, and an adjusting plate is rotatably provided on the fixed sleeve and cooperates with the adjusting stud through a thread.

[0008] As an improvement, an adjustment tube is provided on the fixed sleeve, an adjustment rod extending from the adjustment tube is slidably provided inside the adjustment tube, a limit rod extending from the adjustment tube is provided at the upper end of the adjustment rod, a limit slot cooperating with the limit rod is provided on the adjustment plate, and an adjustment spring connected to the adjustment rod is provided inside the adjustment tube.

[0009] As an improvement, the pre-stressing assembly includes a pre-stressing bracket arranged on the upper mold, a pre-stressing sleeve is slidably provided on the pre-stressing bracket, a pre-stressing spring connected to the pre-stressing sleeve is sleeved on the pre-stressing bracket, a pre-stressing platform is provided at the lower end of the pre-stressing sleeve, and a pre-stressing cover is provided on the pre-stressing sleeve and is slidably connected to the tablet pressing cavity.

[0010] As an improvement, the screening assembly includes a screening support arranged on the lower mold, a slag discharge plate is obliquely arranged on the screening support, a slag discharge plate is connected to a slag discharge pipe, a screening plate is provided on the slag discharge plate, a discharge port is provided on the screening plate, and a discharge pipe is connected to the discharge port.

[0011] As an improvement, the blanking assembly includes a blanking bracket arranged on the upper mold, a blanking ejector rod is slidably provided on the blanking bracket, a blanking spring connected to the blanking ejector rod is sleeved on the blanking bracket, and a blanking brush is provided on the blanking ejector rod.

[0012] As an improvement, the middle mold is provided with a containing unit for containing tablet raw materials, the containing unit includes a raw material box arranged on the positioning table, the lower end of the raw material box is connected with a feeding pipe cooperating with the tablet pressing chamber, the feeding pipe is provided with a discharge valve, the raw material box is slidably provided with a containing slide rod that moves with the upper mold, the lower end of the containing slide rod is provided with a containing connecting rod, the containing connecting rod is provided with a clearing rod, and the containing slide rod is sleeved with a containing spring connected with the containing connecting rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects: the driving motor drives the driving block to move through the driving slider, and the driving block drives the upper die and the lower die to synchronously approach the middle die through the cooperation of the upper driving rod, the connecting rod and the lower driving rod, so as to avoid the tablet from being broken during the tableting process and improve the quality of the finished tablets; the pre-pressing component pre-presses the powder to avoid the flying powder during the compacting process and prevent the tablet press and the tablet from being polluted, so as to further improve the production quality of the tablets. Specifically:

[0014] 1. The positioning spring drives the positioning slide column to keep in cooperation with the linkage inclined slot and the linkage longitudinal slot through the positioning slide plate. Since the linkage inclined slot and the linkage longitudinal slot are interconnected, when the upper die moves downward, the rotating table remains stationary, which is convenient for the upper die and the lower die to cooperate in pre-pressing, tablet pressing and unloading operations. When the upper die moves upward, the rotating table first remains stationary and then rotates, so that the tablet pressing cavity rotates to perform the next step of operation, thereby improving the continuity of the operation and the production efficiency;

[0015] 2. The adjustment lever can be turned to drive the limit rod to separate from the limit slot, and then the adjustment plate can be rotated. Since the adjustment plate and the adjustment stud are threadedly matched, and the fixing slot and the fixing block are slidably matched, the height of the tableting sleeve can be adjusted by rotating the adjustment plate, and then the height of the tableting rod can be adjusted, so as to adjust the tableting pressure according to the production needs of the tablets, thereby improving the scope of application and the convenience of use;

[0016] 3. The pre-pressing component acts on the pre-pressing sleeve through the elastic force of the pre-pressing spring. The pre-pressing sleeve cooperates with the pre-pressing table and the pre-pressing cover to pre-press the tablet powder, thereby preventing the occurrence of flying powder in the subsequent tableting process, preventing the tablet press and tablets from being contaminated, and improving the production quality of tablets;

[0017] 4. When the upper die moves, it drives the loading slide bar to move. The loading slide bar drives the dredging rod to reciprocate up and down through the loading connecting rod, thereby avoiding the blockage of tablet powder in the raw material box and keeping the discharge of the raw material box unobstructed. With the cooperation of the discharge valve, the uniformity of the quality of tablet powder is improved, the accuracy of tablet dosage is improved, and the production quality of tablets is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a pharmaceutical tablet press machine of the present invention. Figure 1 .

[0019] Figure 2 This is a schematic diagram of the structure of a pharmaceutical tablet press machine of the present invention. Figure 2 .

[0020] Figure 3 The invention discloses an exploded view of a pharmaceutical tablet press.

[0021] Figure 4This is a schematic diagram of the structure of the middle die part of a pharmaceutical tablet press of the present invention. Figure 1 .

[0022] Figure 5 This is a schematic diagram of the structure of the middle die part of a pharmaceutical tablet press of the present invention. Figure 2 .

[0023] Figure 6 The present invention is a cross-sectional view of a middle die portion of a pharmaceutical tablet press.

[0024] Figure 7 The present invention is a schematic structural diagram of an upper die portion of a pharmaceutical tablet press.

[0025] Figure 8 The present invention is a cross-sectional view of an upper die portion of a pharmaceutical tablet press.

[0026] Fig. 9 The present invention is a schematic structural diagram of a tablet pressing assembly of a pharmaceutical tablet pressing machine.

[0027] Fig.10 The present invention is a cross-sectional view of a tablet pressing assembly of a pharmaceutical tablet pressing machine.

[0028] Fig.11 The present invention is a schematic structural diagram of a pre-pressing component of a pharmaceutical tablet press.

[0029] Fig.12 The present invention is a schematic structural diagram of a screening component of a medicine tablet press.

[0030] Fig.13 The present invention is a cross-sectional view of a screening component of a pharmaceutical tablet press.

[0031] Fig.14 The present invention is a schematic structural diagram of a feeding assembly of a medicine tablet press.

[0032] Fig.15 The present invention is a cross-sectional view of a feeding assembly of a pharmaceutical tablet press.

[0033] Fig.16 The present invention is a medicine tablet press machine Figure 4 Enlarged view of part A.

[0034] Fig.17 The present invention is a medicine tablet press machine Figure 8 Magnified view of part B.

[0035] Fig.18 The present invention is a medicine tablet press machine Fig. 9 Magnified view of part C.

[0036] Fig.19The present invention is a medicine tablet press machine Fig.10 Enlarged view of part D.

[0037] As shown in the figure: 1. Support frame; 11. Connecting rod; 12. Lower driving rod; 13. Upper driving rod; 14. Support frame; 15. Driving motor; 16. Transmission rod; 2. Middle mold; 21. Positioning table; 22. Turntable; 221. Linkage column; 222. Linkage inclined slot; 223. Linkage longitudinal slot; 224. Tableting chamber; 23. Filling unit; 231. Raw material box; 232. Feeding pipe; 233. Discharging valve; 234. Filling slide bar; 235. Filling spring; 236. Filling connecting rod; 237. Dredge rod; 238. U-shaped rod; 24. Baffle; 3. Upper mold; 31. Driving block; 311. Driving slide block; 312. Fixed column; 32. Linkage sleeve; 321. Positioning sleeve; 322. Positioning slide plate; 323. Positioning slide column; 324. Positioning spring; 4. Lower mold; 5. Tablet assembly; 51. Tablet support; 511. Fixed slot; 512. Fixed sleeve; 513. Adjustment plate; 514. Limit slot; 515. Adjustment spring; 516. Adjustment lever; 517. Limiting rod; 518. Adjustment tube; 52. Tablet sleeve; 521. Fixed block; 522. Tablet rod; 523. Tablet spring; 524. Adjustment stud; 53. Tablet cover; 6 , pre-stressing assembly; 61, pre-stressing bracket; 62, pre-stressing sleeve; 63, pre-stressing spring; 64, pre-stressing table; 65, pre-stressing cover; 7, screening assembly; 71, screening bracket; 72, slag discharge plate; 721, slag discharge pipe; 73, screening plate; 731, discharge port; 732, discharge pipe; 8, unloading assembly; 81, unloading bracket; 82, unloading push rod; 83, unloading spring; 84, unloading brush. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0039] Combined with Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 , Attachment Figure 7 , Attachment Fig. 9 , Attachment Fig.11 , Attachment Fig.12 , Attachment Fig.14 , Attachment Fig.16 With attached Fig.18As shown, a pharmaceutical tablet press comprises a support frame 1, on which a middle die 2 is arranged, and an upper die 3 and a lower die 4 are slidably arranged on the support frame 1 at the upper and lower sides of the middle die 2, respectively, and a tablet pressing assembly 5 for tabletting tablets is arranged on the upper die 3 and the lower die 4, respectively, and a pre-pressing assembly 6 for pre-pressing tablets and a feeding assembly 8 for ejecting the tablets from the middle die 2 are arranged on the upper die 3, and a screening assembly 7 corresponding to the feeding assembly 8 is arranged on the lower die 4, and two groups of tablet pressing assemblies 5 are arranged on the lower die 4 and are respectively arranged corresponding to the tablet pressing assembly 5 and the pre-pressing assembly 6 on the upper die 3, and the middle die 2 comprises a positioning table 21, and a rotating table 22 is rotatably arranged in the positioning table 21 and rotates with the movement of the upper die 3, and a tablet pressing cavity 224 is arranged on the rotating table 22, and a baffle 24 is arranged on the positioning table 21.

[0040] The working principle of the present invention is as follows: the upper die 3 and the lower die 4 move synchronously. When the upper die 3 and the lower die 4 approach each other synchronously, the upper die 3 drives the tablet pressing assembly 5, the pre-pressing assembly 6 and the blanking assembly 8 to move. At the same time, the lower die 4 drives the tablet pressing assembly 5 and the screening assembly 7 to move. At this time, the pre-pressing assembly 6 of the upper die 3 cooperates with the corresponding tablet pressing assembly 5 on the lower die 4 to pre-press the tablet powder. The tablet pressing assembly 5 of the upper die 3 cooperates with the corresponding tablet pressing assembly 5 on the lower die 4 to press the pre-pressed tablet powder. The blanking assembly 8 on the upper die 3 The tablets that have been compressed are ejected, and the tablets fall into the screening component 7 under the action of gravity for discharge. When the upper mold 3 and the lower mold 4 move away from each other synchronously, the rotating table 22 remains stationary first, so that the tablet pressing component 5, the pre-compression component 6 and the unloading component 8 are separated from the tablet pressing chamber 224. After that, the rotating table 22 rotates, and the tablet pressing chamber 224 rotates to the next step. The baffle 24 prevents the tablets from falling during the transfer process in the tablet pressing chamber 224. The above steps can be repeated to realize the pre-compression, tablet pressing and discharge operations of the tablets, thereby improving the operation efficiency and the continuity of production.

[0041] Combined with Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 7 , Attachment Figure 8 With attached Fig.17 As shown, a connecting rod 11 is rotatably provided on the support frame 1, and a lower driving rod 12 and an upper driving rod 13 are rotatably provided at both ends of the connecting rod 11. The lower driving rod 12 is rotatably connected to the lower mold 4, and the upper driving rod 13 is rotatably connected to the upper mold 3. A supporting bracket 14 is provided on the support frame 1, and a driving motor 15 is provided on the supporting bracket 14. A transmission rod 16 is provided at the output end of the driving motor 15. A driving block 31 is provided on the upper mold 3, and a driving slider 311 is slidably provided in the driving block 31. A fixed column 312 is eccentrically provided on the driving slider 311, and the fixed column 312 is rotatably connected to the transmission rod 16.

[0042] The working principle of the synchronous movement of the upper mold 3 and the lower mold 4 is as follows: the driving motor 15 drives the transmission rod 16 to rotate, and the transmission rod 16 drives the driving slider 311 to slide back and forth along the driving block 31 through the fixed column 312. Since the fixed column 312 and the driving slider 311 are eccentrically arranged, the driving slider 311 performs a quasi-circular motion. During this process, since the upper mold 3 is slidingly connected to the support frame 1, the upper mold 3 slides back and forth along the support frame 1. While sliding, the upper mold 3 drives the upper driving rod 13 to move synchronously. The upper driving rod 13 drives the lower driving rod 12 to move with the cooperation of the connecting rod 11. Since the lower driving rod 12 is rotationally connected to the lower mold 4, the lower mold 4 moves synchronously while the upper mold 3 moves.

[0043] Combined with Figure 1 , Attachment Figure 2 , Attachment Figure 4 , Attachment Figure 5 , Attachment Figure 6 , Attachment Figure 7 , Attachment Figure 8 , Attachment Fig.16 With attached Fig.17 As shown, a linkage column 221 is provided on the rotating table 22, and a linkage oblique groove 222 and a linkage longitudinal groove 223 which are interconnected are provided on the linkage column 221, and a platform is provided at the connection between the linkage oblique groove 222 and the linkage longitudinal groove 223, and a linkage sleeve 32 is provided at the lower end of the upper mold 3, and a positioning sleeve 321 is provided in the linkage sleeve 32, and a positioning slide plate 322 is slidingly provided in the positioning sleeve 321, and a positioning slide column 323 extending from the positioning sleeve 321 is provided on the positioning slide plate 322, and the positioning slide column 323 is slidably matched with the linkage oblique groove 222 and the linkage longitudinal groove 223, and a positioning spring 324 connected with the positioning slide plate 322 is provided in the positioning sleeve 321.

[0044] The working principle of the upper die 3 moving and driving the rotating table 22 to rotate is as follows: when the upper die 3 moves toward the rotating table 22, the positioning slide column 323 slides along the linkage longitudinal groove 223 under the cooperation of the positioning spring 324 and the positioning slide plate 322. At this time, the rotating table 22 remains stationary, and the upper die 3 can drive the pre-pressing assembly 6, the tablet pressing assembly 5 and the unloading assembly 8 to move synchronously. With the cooperation of the lower die 4, the tablets are pre-pressed, pressed and discharged. When the upper die 3 moves away from the rotating table 22, due to the linkage A platform is provided at the connection between the movable inclined slot 222 and the linkage longitudinal slot 223, so that with the cooperation of the positioning spring 324 and the positioning slide plate 322, the positioning slide column 323 slides along the linkage inclined slot 222. Since there is a longitudinal groove at the front end of the linkage inclined slot 222, the pre-pressing component 6, the tablet pressing component 5 and the unloading component 8 can be easily separated from the tablet pressing chamber 224. After that, the rotating table 22 can be rotated, and the tablet pressing chamber 224 can be synchronously rotated to the next step for operation, thereby realizing the continuity of tablet production.

[0045] Combined with Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Fig. 9 , Attachment Fig.10 , Attachment Fig.18 With attached Fig.19 As shown, the tablet pressing assembly 5 includes a tablet pressing bracket 51, a tablet pressing sleeve 52 is slidably provided on the tablet pressing bracket 51, a tablet pressing rod 522 is provided in the tablet pressing sleeve 52 and is slidably connected to the tablet pressing cavity 224, and the tablet pressing rod 522 cooperates with the tablet pressing cavity 224, the tablet pressing bracket 51 is provided with a fixing groove 511, the tablet pressing sleeve 52 is provided with a fixing block 521 slidably connected to the fixing groove 511, an adjusting stud 524 is provided at the lower end of the tablet pressing sleeve 52, the tablet pressing bracket 51 is provided with a fixing sleeve 512, and an adjusting plate 51 is rotatably provided on the fixing sleeve 512 and is threadedly matched with the adjusting stud 524 3. An adjusting tube 518 is provided on the fixed sleeve 512, and an adjusting lever 516 extending out of the adjusting tube 518 is slidably provided in the adjusting tube 518, and a limiting plug rod 517 extending out of the adjusting tube 518 is provided at the upper end of the adjusting lever 516, and a limiting slot 514 cooperating with the limiting plug rod 517 is provided on the adjusting plate 513, and an adjusting spring 515 connected with the adjusting lever 516 is provided in the adjusting tube 518, and a pressing cover 53 extending out of the pressing sleeve 52 is slidably provided in the pressing sleeve 52, and a pressing spring 523 connected with the pressing cover 53 is provided in the pressing sleeve 52.

[0046] The working principle of the tablet pressing assembly 5 is as follows: when the upper die 3 and the lower die 4 are synchronously approached to each other, the tablet pressing bracket 51 moves synchronously, and the tablet pressing bracket 51 drives the tablet pressing rod 522 to move through the tablet pressing sleeve 52, and the two sets of tablet pressing rods 522 moving toward each other move to cooperate with the tablet pressing cavity 224, thereby realizing the tablet pressing operation of the tablet powder in the tablet pressing cavity 224;

[0047] When the pressure of the tablet pressing operation needs to be adjusted, the adjusting lever 516 is pushed downward, and the adjusting lever 516 drives the limiting rod 517 to separate from the limiting slot 514. At this time, the adjusting plate 513 can be rotated. By rotating the adjusting plate 513, due to the limiting of the fixing groove 511 and the fixing block 521, the adjusting plate 513 drives the adjusting stud 524 to move axially along the adjusting plate 513 through the thread. At this time, the adjusting lever 516 is released, and under the action of the adjusting spring 515, the limiting rod 517 is inserted into the limiting slot. 514, to fix the adjustment plate 513. When the distance that the adjustment stud 524 extends out of the adjustment plate 513 increases, the adjustment stud 524 drives the tablet pressing rod 522 to move synchronously through the tablet pressing sleeve 52, and the distance between the two groups of tablet pressing rods 522 decreases. Since the moving trajectories of the upper mold 3 and the lower mold 4 are fixed, at this time, the pressure of the tablet pressing rod 522 on the tablet increases. Conversely, when the distance that the adjustment stud 524 extends out of the adjustment plate 513 decreases, the pressure of the tablet pressing rod 522 on the tablet decreases.

[0048] Combined with Figure 1 , Attachment Figure 2 , Attachment Figure 3 With attached Fig.11 As shown, the prestressing assembly 6 includes a prestressing bracket 61 arranged on the upper mold 3, a prestressing sleeve 62 is slidably provided on the prestressing bracket 61, a prestressing spring 63 connected to the prestressing sleeve 62 is sleeved on the prestressing bracket 61, a prestressing platform 64 is provided at the lower end of the prestressing sleeve 62, the cross-section of the prestressing platform 64 is a wedge-shaped structure, a prestressing cover 65 slidably connected to the tablet pressing cavity 224 is provided on the prestressing sleeve 62, the prestressing cover 65 is arranged corresponding to the tablet pressing cavity 224, and the prestressing platform 64 extends from the prestressing cover 65.

[0049] The working principle of the pre-pressing component 6 is as follows: since the lower mold 4 is provided with a tablet pressing component 5 corresponding to the pre-pressing component 6, the tablet pressing rod 522 on the tablet pressing component 5 cooperates with the tablet pressing cavity 224 to form a tablet powder containing area. When the upper mold 3 moves downward, the upper mold 3 drives the pre-pressing sleeve 62 to move downward through the pre-pressing bracket 61. When the pre-pressing sleeve 62 moves downward, the pre-pressing platform 64 and the pre-pressing cover 65 move downward synchronously. The lower mold 4 drives the tablet pressing rod 522 to move upward, and the pre-pressing platform 64 contacts with the tablet powder. The pre-pressing platform 64 pre-presses the tablet powder. Since the cross-section of the pre-pressing platform 64 is a wedge-shaped structure, the air in the tablet powder can be discharged to avoid flying powder. When the pre-pressing cover 65 contacts with the tablet powder, the tablet powder can be pre-pressed.

[0050] Combined with Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Fig.12 , Attachment Fig.13 , Attachment Fig.14 With attached Fig.15 As shown, the unloading component 8 includes a unloading bracket 81 arranged on the upper mold 3, a unloading push rod 82 is slidably provided on the unloading bracket 81, a unloading spring 83 connected to the unloading push rod 82 is sleeved on the unloading bracket 81, a unloading brush 84 is provided on the unloading push rod 82, and the unloading brush 84 is arranged corresponding to the tableting cavity 224, and the screening component 7 includes a screening bracket 71 arranged on the lower mold 4, a slag discharge plate 72 is obliquely provided on the screening bracket 71, a slag discharge pipe 721 is connected to the slag discharge plate 72, a screening plate 73 is provided on the slag discharge plate 72, a discharging port 731 is provided on the screening plate 73, a discharging port 731 is connected to a discharging pipe 732, and the discharging port 731 is arranged obliquely.

[0051] The working principle of the cooperation between the feeding assembly 8 and the screening assembly 7 is as follows: when the upper mold 3 and the lower mold 4 move toward each other synchronously, the upper mold 3 drives the feeding ejector rod 82 to move downward through the feeding bracket 81, and the feeding ejector rod 82 ejects the tablets in the tableting chamber 224. At the same time, the lower mold 4 drives the slag plate 72 and the screen plate 73 to move upward synchronously through the screen bracket 71, and the distance between the screen plate 73 and the tableting chamber 224 is reduced, so that when the tablets in the tableting chamber 224 are ejected by the feeding ejector rod 82 and fall under the action of gravity, the tablets are prevented from being damaged by excessive impact with the screen plate 73, thereby improving the tablet production quality. If there are tablets that are broken during the tableting process, the broken tablets will enter the slag plate 72 through the screen plate 73 and be discharged through the slag pipe 721, thereby realizing discharging and screening at the same time, improving the tablet production efficiency while further improving the tablet production quality.

[0052] Combined with Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 , Attachment Figure 6 With attached Fig.16 As shown, the middle mold 2 is provided with a containing unit 23 for containing tablet raw materials, and the containing unit 23 includes a raw material box 231 arranged on the positioning platform 21, and the lower end of the raw material box 231 is connected with a feeding pipe 232 that cooperates with the tablet pressing cavity 224, and the feeding pipe 232 is provided with a discharge valve 233. A containing slide bar 234 that moves with the upper mold 3 is slidably provided on the raw material box 231, and a U-shaped rod 238 is provided on the containing slide bar 234, and one end of the U-shaped rod 238 abuts against the upper mold 3, and a containing connecting rod 236 is provided at the lower end of the containing slide bar 234, and a clearing rod 237 is provided on the containing connecting rod 236, and a containing spring 235 connected with the containing connecting rod 236 is sleeved on the containing slide bar 234.

[0053] The working principle of the filling unit 23 is as follows: when the upper mold 3 moves upward, the upper mold 3 drives the filling slide bar 234 to slide upward through the U-shaped rod 238, and the filling slide bar 234 drives the dredging rod 237 to move upward through the filling connecting rod 236, and the dredging rod 237 dredges the tablet powder to prevent the tablet powder from accumulating in the raw material box 231, causing poor discharge. At the same time, the filling slide bar 234 squeezes the filling spring 235, and the filling spring 235 contracts under force. When the upper mold 3 moves downward, the filling spring 235 drives the filling slide bar 234 to reset, and the filling slide bar 234 moves downward. The filling connecting rod 236 drives the dredging rod 237 to move downward. This cycle is repeated to prevent the tablet powder from accumulating in the raw material box 231, so that with the cooperation of the discharge valve 233 and the discharge pipe 732, quantitative feeding of the tablet pressing cavity 224 is achieved.

[0054] In the specific implementation of the present invention, the pharmaceutical powder is loaded into the raw material box 231, and the adjustment plate 513 is rotated to adjust the distance that the adjustment stud 524 extends out of the adjustment plate 513 according to the production needs of the tablets, thereby adjusting the position of the tablet pressing rod 522, and the discharge pipe and the discharge port 731 are respectively connected to the corresponding collecting components to complete the preliminary preparation of the tablet pressing operation;

[0055] Start the drive motor 15 to drive the upper mold 3 and the lower mold 4 to reciprocate towards and away from each other, control the opening and closing of the discharge valve 233 to quantitatively add material to the tablet pressing chamber 224, when the upper mold 3 and the lower mold 4 are close to each other, the pre-pressing unit of the upper mold 3 and the tablet pressing unit of the lower mold 4 cooperate to pre-press the tablet powder, the tablet pressing unit of the upper mold 3 and the tablet pressing unit of the lower mold 4 tablet the pre-pressed tablet powder, the discharge assembly 8 of the upper mold 3 ejects the tablet from the tablet pressing chamber 224, the screening assembly 7 of the lower mold 4 receives the tablet, when the upper mold 3 and the lower mold 4 are away from each other, the rotating table 22 rotates, and the rotating chamber rotates to the next step to prepare for operation, and the above steps are repeated to realize the pre-pressing, tablet pressing and discharge operations of the tablet.

[0056] The present invention and its embodiments are described above, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it and do not deviate from the purpose of the invention, they can creatively design a structure and embodiment similar to the technical solution, which should fall within the protection scope of the present invention.

Claims

1. A tablet press for pharmaceutical tablets, comprising a support frame (1), wherein a middle die (2) is disposed on the support frame (1), and an upper die (3) and a lower die (4) are slidably disposed on the upper and lower sides of the middle die (2) on the support frame (1), characterized in that: The upper die (3) and the lower die (4) are both provided with a tablet pressing assembly (5) for pressing the tablets, the upper die (3) is provided with a pre-pressing assembly (6) for pre-pressing the tablets and a material discharge assembly (8) for ejecting the tablets from the middle die (2), and the lower die (4) is provided with a screening assembly (7) corresponding to the material discharge assembly (8); The support frame (1) is rotatably provided with a connecting rod (11), and two ends of the connecting rod (11) are rotatably provided with a lower driving rod (12) and an upper driving rod (13), the lower driving rod (12) is rotatably connected to the lower mold (4), and the upper driving rod (13) is rotatably connected to the upper mold (3). The support frame (1) is provided with a supporting frame (14), and a driving motor (15) is provided on the supporting frame (14). A transmission rod (16) is provided at the output end of the driving motor (15). The upper mold (3) is provided with a driving block (31), and a driving slider (311) is slidably provided in the driving block (31). A fixed column (312) is eccentrically provided on the driving slider (311), and the fixed column (312) is rotatably connected to the transmission rod (16). The middle mold (2) comprises a positioning table (21), a rotating table (22) is rotatably arranged inside the positioning table (21) and rotates along with the movement of the upper mold (3), and a tablet pressing cavity (224) is arranged on the rotating table (22); The rotating table (22) is provided with a linkage column (221), and the linkage column (221) is provided with a linkage oblique groove (222) and a linkage longitudinal groove (223) that are interconnected. The lower end of the upper mold (3) is provided with a linkage sleeve (32), and a positioning sleeve (321) is provided in the linkage sleeve (32). A positioning slide plate (322) is slidably provided in the positioning sleeve (321), and a positioning slide column (323) extending from the positioning sleeve (321) is provided on the positioning slide plate (322). The positioning slide column (323) is slidably matched with the linkage oblique groove (222) and the linkage longitudinal groove (223), and a positioning spring (324) connected to the positioning slide plate (322) is provided in the positioning sleeve (321); The tablet pressing assembly (5) comprises a tablet pressing bracket (51), a tablet pressing sleeve (52) is slidably provided on the tablet pressing bracket (51), a tablet pressing rod (522) slidably connected to the tablet pressing cavity (224) is provided in the tablet pressing sleeve (52), a fixing groove (511) is provided on the tablet pressing bracket (51), a fixing block (521) slidably connected to the fixing groove (511) is provided on the tablet pressing sleeve (52), an adjusting stud (524) is provided at the lower end of the tablet pressing sleeve (52), a fixing sleeve (512) is provided on the tablet pressing bracket (51), and an adjusting plate (513) rotatably provided on the fixing sleeve (512) and engaged with the adjusting stud (524) through a thread; The fixed sleeve (512) is provided with an adjustment tube (518), an adjustment lever (516) extending from the adjustment tube (518) is slidably provided in the adjustment tube (518), a limit rod (517) extending from the adjustment tube (518) is provided at the upper end of the adjustment lever (516), a limit slot (514) cooperating with the limit rod (517) is provided on the adjustment plate (513), and an adjustment spring (515) connected to the adjustment lever (516) is provided in the adjustment tube (518); The middle die (2) is provided with a containing unit (23) for containing tablet raw materials. The containing unit (23) comprises a raw material box (231) arranged on the positioning platform (21). The lower end of the raw material box (231) is connected to a feeding pipe (232) that cooperates with the tablet pressing chamber (224). The feeding pipe (232) is provided with a discharge valve (233). The raw material box (231) is slidably provided with a containing slide bar (234) that moves with the upper die (3). The lower end of the containing slide bar (234) is provided with a containing connecting rod (236). The containing connecting rod (236) is provided with a dredging rod (237). The containing slide bar (234) is sleeved with a containing spring (235) that is connected to the containing connecting rod (236).

2. A pharmaceutical tablet press according to claim 1, characterized in that: The pre-pressing assembly (6) comprises a pre-pressing bracket (61) arranged on the upper mold (3), a pre-pressing sleeve (62) being slidably provided on the pre-pressing bracket (61), a pre-pressing spring (63) connected to the pre-pressing sleeve (62) being sleeved on the pre-pressing bracket (61), a pre-pressing platform (64) being provided at the lower end of the pre-pressing sleeve (62), and a pre-pressing cover (65) being slidably connected to the tablet pressing cavity (224) being provided on the pre-pressing sleeve (62).

3. A pharmaceutical tablet press according to claim 1, characterized in that: The screening material assembly (7) comprises a screening material support (71) arranged on the lower mould (4); a slag discharge plate (72) is obliquely arranged on the screening material support (71); a slag discharge pipe (721) is connected to the slag discharge plate (72); a screening material plate (73) is arranged on the slag discharge plate (72); a material discharge port (731) is arranged on the screening material plate (73); and a material discharge pipe (732) is connected to the material discharge port (731).

4. A pharmaceutical tablet press according to claim 1, characterized in that: The blanking assembly (8) comprises a blanking bracket (81) arranged on the upper mold (3), a blanking ejector rod (82) being slidably arranged on the blanking bracket (81), a blanking spring (83) connected to the blanking ejector rod (82) being sleeved on the blanking bracket (81), and a blanking brush (84) being arranged on the blanking ejector rod (82).

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