Tablet pressing and forming device with controllable screening structure for manufacturing medical tablets

Abstract

The invention relates to the technical field of medical tablet manufacturing, in particular to a tablet forming device with a controllable screening structure for medical tablet manufacturing, which comprises a tablet press, a screening cavity is arranged in one side of the tablet press, a conveying chain is arranged at the bottom end of the screening cavity, the screening cavity comprises a fan, and a vibrating screen frame is arranged at the bottom of the fan. In the tabletting forming device, a screening and filtering cable connected with an inner frame of a vibrating screen frame is connected to an inner frame sliding groove through regulation and control sliding blocks at the two ends, the screening and filtering cable and the regulation and control sliding blocks are mutually crossed to form a screen, and the screen can be adjusted by matching the regulation and control sliding blocks connected with the two ends of the screening and filtering cable with pulleys connected with a double-end motor. The multiple groups of regulation and control sliding blocks can be controlled to keep the sliding expansion distance and the sliding retraction distance in the equidistant state, so that different screening and filtering net specifications are formed, the circular tablets of different sizes and specifications can be adapted, the controllable screening process is kept, the high adaptability is kept, and the complexity of the preparation process is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of pharmaceutical tablet manufacturing, in particular to a tablet forming device with a controllable screening structure for pharmaceutical tablet manufacturing. Background Art

[0002] Tablets are solid preparations in the form of flakes or special-shaped flakes that are formed by uniformly mixing drugs and excipients and then pressing them. Tablets are mainly oral tablets, but also include lozenges, sublingual tablets, buccal patches, chewable tablets, dispersible tablets, effervescent tablets, vaginal tablets, rapid-release or sustained-release or controlled-release tablets, and enteric-coated tablets. In the prior art, in order to facilitate the storage and swallowing of the drug, the powdered drug is pressed into tablets, and most of the rotary tablet presses used in the prior art are used.

[0003] When the pharmaceutical rotary tablet press is used to manufacture pharmaceutical tablets, the drugs are loaded into a device called a feed tray, which controls the feeding speed according to the given process parameters, and then the scraper pushes the excess drugs back into the feed tray, thus ensuring the uniform distribution of the drugs. After the drugs are evenly dispersed in the feed tray, the mold will rotate, the mold will descend and compress the drugs, and the mold can be preheated by electronic heating as required. While the mold is descending, the machine will distribute enough pressure to deform and fix the powder and granular drugs in the space inside the mold to form tablets of fixed size and shape. Then the mold will begin to rise and open, and the tablets formed by compression will be ejected into the collection tray at the other end.

[0004] In the process of pressing the drug powder into tablets and ejecting them onto the collection tray, since the tablets are in powder state before being pressed and formed, most of the tablets have a large amount of drug powder adhered to the surface, and some tablets are individually broken during the forming process, resulting in the tablets not being formed. Direct collection will affect the subsequent packaging and dosage accuracy. When the tablets are pressed and formed and packaged at the later stage, it is necessary to deliberately sort and screen the powder attached to the tablets again, and it is necessary to cooperate with manually operated sieves or screening machines to screen the drugs. The preparation process is time-consuming and very cumbersome.

[0005] In view of the above problems, we propose a tablet forming device with a controllable screening structure for manufacturing pharmaceutical tablets. Summary of the invention

[0006] The object of the present invention is to provide a tablet forming device with a controllable screening structure for manufacturing pharmaceutical tablets, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A tablet forming device with a controllable screening structure for manufacturing pharmaceutical tablets, comprising a tablet press, a screening chamber is arranged inside one side of the tablet press, and a conveying chain is arranged at the bottom end of the screening chamber, the screening chamber comprises a fan, and a vibrating screen frame is arranged at the bottom of the fan, baffles are connected to the top surfaces of both sides of the vibrating screen frame, and limiting rings are distributed at both ends of the baffles, the inner wall of the limiting ring is fitted with an inner rubber ring, and the inner diameter sleeve of the inner rubber ring is provided with limiting piles and reserved gaps, micro-vibrating motors are connected around the bottom end of the vibrating screen frame, and screening cables are cross-arranged in the inner frame of the vibrating screen frame, regulating sliders are connected to both ends of the screening cable, and a double-end motor is arranged inside the regulating slider, pulleys are connected to both ends of the double-end motor, and both sides of the regulating slider are arranged equidistantly along the inner frame of the vibrating screen frame with slide grooves, a discharge rack is arranged at one end of the vibrating screen frame, and a waste box is arranged at the bottom of the vibrating screen frame.

[0008] Furthermore, the screening cables and the regulating sliders connected at both ends are cross-arranged into a mesh along the slide groove structure of the inner frame of the vibration screen frame, and the screening cables are woven and formed by nylon fibers.

[0009] Furthermore, the regulating slider is slidably matched with the inner frame of the vibrating screen frame through a pulley, and the vibrating screen frame is connected and fixed to the cavities on both sides of the screening cavity through micro-vibration motors distributed at both ends.

[0010] Furthermore, both ends of the vibrating screen frame are sleeved on the outer wall of the limiting pile through limiting rings, and the limiting piles are connected and fixed to the cavities on both sides of the screening cavity.

[0011] Furthermore, the tablet press comprises an outer frame, and a collecting box is engaged inside the outer frame, a tablet pressing assembly is arranged on one side of the top end of the outer frame, and a barrel is connected to the top end of the tablet pressing assembly, and glass covers are distributed around the tablet pressing assembly.

[0012] Furthermore, one side of the top end of the outer frame is connected and fixed to the glass cover and the tablet pressing assembly, and the top end of the tablet pressing assembly is connected to the barrel.

[0013] Furthermore, the conveyor chain includes a chain frame, and a conveying groove is opened on the inner wall of the chain frame, a conveyor belt is arranged in the middle of the conveying groove, and the outer walls around the conveyor belt are connected with diverter plates, and servo motors are connected to both ends of the chain frame.

[0014] Furthermore, the conveying trough is inclined along the inner walls on both sides of the chain frame, and the outer walls on both sides of the chain frame are fixedly connected to the inner walls on both sides of the screening chamber.

[0015] Furthermore, the two ends of the conveyor belt form a transmission structure through a servo motor and a chain frame, and the diverter plates are arranged at equal distances along the outer walls around the conveyor belt.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, when the vibrating screen frame relies on the eccentric wheel structure of the micro-vibrating motor to achieve continuous vibrating screen, the limit rings connected on both sides thereof are set through the inner rubber ring of the inner wall and the limit pile, so as to keep the vibrating screen range within the limit, and avoid large-scale shaking affecting the stable operation of the overall equipment, and the screening cable connected to the inner frame of the vibrating screen frame is connected to the inner frame slide groove through the regulating sliders at both ends, and forms a screen by crossing each other, and the screen can be adjusted by the regulating sliders connected at both ends of the screening cable and the double-end motor connection pulley. The multiple groups of regulating sliders can control the distance between the sliding expansion and contraction in the equidistant state, so as to form different specifications of the screening screen, so as to cope with round tablets of different sizes, thereby maintaining a controllable screening process, maintaining high adaptability, and reducing the complexity of the preparation process; In the present invention, in order to maintain the stability of the tableting manufacturing process of the tablet press during the manufacturing process of the pharmaceutical tablet, an external protective structure is used to provide a stable tableting process. When the tablet press is performing the manufacturing process of the pharmaceutical tablet, the powder material can be fed through the barrel and transported by the barrel to the rotary tablet pressing assembly connected to the bottom end for stable and efficient tableting. When the tablet pressing assembly is performing the tableting operation, the overall structure is within the range of the glass cover, providing protection for the overall assembly, maintaining the anti-interference process of the tableting operation, and reducing the influence of external impurities in the powder tableting process. In the present invention, in order to maintain the efficient screening and powder removal process of the entire device during the discharge process and reduce the complexity of the preparation process, this tablet pressing component can form a vibration process through the vibration screen frame and the connected micro-vibration motor during the tablet discharge operation, and can cooperate with the internally connected cross-arranged screening cables to continuously vibrate and remove powder and impurities on the conveyed tablets. During the process, the fan at the top blows air downward, so that the powder and broken tablets shaken out by the vibration screen fall into the waste box at the bottom of the vibration screen frame with the air flow, and the tablets that meet the specifications and complete the powder screening process are continuously transported at an inclined angle with the vibration process until they contact the discharge frame and are discharged one by one along the bottom guide groove. The process is efficient and stable, and the vibration screening process is efficient, which can effectively improve the efficiency of the overall pharmaceutical tablet production process; In the present invention, in order to maintain quantitative conveying of tablets after screening, one end of the chain frame is connected to the discharge frame, so that the discharge frame can conveniently discharge the tablets stably on the chain frame, and the tablets are conveyed through the inner inclined conveying groove inside the chain frame. At the same time, with the discharge process, the transmission of the conveyor belt and the discharge efficiency of the discharge frame are kept unified, so that the tablets can be quantitatively conveyed in conjunction with the diverter plates distributed around the conveyor belt, so that the conveying structure can be replaced at the position of the collection box at the other end of the chain frame to maintain the quantitative conveying process, and the collection box can be replaced without choosing to collect the processed tablets in a stable process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the tablet press of the present invention; Figure 2 The figure is a schematic diagram of the internal structure of the tablet press of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the vibrating screen frame in the screening chamber of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the limiting ring in the screening cavity of the present invention; Figure 5 For the present invention Figure 3 The enlarged structural diagram at A in the middle; Figure 6 This is a schematic diagram of the three-dimensional structure of the regulating slider in the screening chamber of the present invention; Figure 7 It is a schematic diagram of the side structure of the conveyor chain of the present invention.

[0018] In the figure: 1. tablet press; 101. outer frame; 102. collecting box; 103. tablet press assembly; 104. barrel; 105. glass cover; 2. screening chamber; 201. fan; 202. vibrating screen frame; 203. baffle; 204. limiting ring; 205. inner rubber ring; 206. limiting pile; 207. micro vibration motor; 208. screening cable; 209. regulating slider; 210. double-end motor; 211. pulley; 212. chute; 213. discharge rack; 214. waste box; 3. conveyor chain; 301. chain frame; 302. conveyor trough; 303. conveyor belt; 304. diverter plate; 305. servo motor. DETAILED DESCRIPTION

[0019] In order to facilitate the problem to be solved, the embodiment of the present invention provides a tablet forming device with a controllable screening structure for manufacturing pharmaceutical tablets. The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1-2 As shown, a tablet forming device with a controllable screening structure for manufacturing pharmaceutical tablets comprises a tablet press 1, a screening chamber 2 is arranged inside one side of the tablet press 1, and a conveying chain 3 is arranged at the bottom end of the screening chamber 2, the tablet press 1 comprises an outer frame 101, and a collecting box 102 is engaged inside the outer frame 101, a tablet pressing assembly 103 is arranged on one side of the top end of the outer frame 101, and a barrel 104 is connected to the top end of the tablet pressing assembly 103, and glass covers 105 are distributed around the tablet pressing assembly 103; In order to maintain the stability of the tableting process of the tablet press 1 during the manufacture of pharmaceutical tablets, an external protective structure is used to provide a stable tableting process, such as Figure 1-2As shown, when the tablet press 1 is performing a process of manufacturing pharmaceutical tablets, powdered medicine material can be fed into the barrel 104, and transported by the barrel 104 to the rotary tablet pressing assembly 103 connected to the bottom end for stable and efficient tablet pressing. When the tablet pressing assembly 103 is making tablets, the entire structure is within the glass cover 105, which provides protection for the entire assembly, maintains an anti-interference process for the tableting operation, and reduces the impact of external impurities during the powder tablet pressing process.

[0021] like Figure 2-6 As shown, the screening chamber 2 includes a fan 201, and a vibrating screen frame 202 is arranged at the bottom of the fan 201, baffles 203 are connected to the top surfaces of both sides of the vibrating screen frame 202, and limiting rings 204 are distributed at both ends of the baffles 203, the inner wall of the limiting ring 204 is fitted with an inner rubber ring 205, and the inner diameter of the inner rubber ring 205 is sleeved with a limiting pile 206 and a gap is reserved, the bottom of the vibrating screen frame 202 is connected with a micro vibration motor 207, and the vibrating screen frame 202 The inner frame of the vibrating screen frame 202 is cross-arranged with screening cables 208, and both ends of the screening cables 208 are connected with regulating sliders 209, and a double-end motor 210 is arranged inside the regulating slider 209, and both ends of the double-end motor 210 are connected with pulleys 211, and both sides of the regulating slider 209 are arranged with chute grooves 212 arranged equidistantly along the inner frame of the vibrating screen frame 202, a discharge rack 213 is arranged at one end of the vibrating screen frame 202, and a waste box 214 is arranged at the bottom of the vibrating screen frame 202; In order to maintain the efficient screening and powder removal process of the whole device during the discharge process and reduce the complexity of the preparation process, such as Figure 2-6 As shown, during the tablet discharging operation, the tablet pressing assembly 103 can form a vibration process through the vibrating sieve frame 202 and the connected micro-vibration motor 207, and can cooperate with the internally connected cross-arranged screening cables 208 to continuously vibrate and sieve the conveyed tablets and remove powder and impurities. During the process, the fan 201 at the top blows air downward, so that the powder and broken tablets shaken out by the vibrating sieve fall into the waste box 214 at the bottom of the vibrating sieve frame 202 along with the air flow, and the tablets that meet the specifications and complete the powder screening process are continuously conveyed at an inclined angle along with the vibration process until they contact the discharge frame 213 and are discharged one by one along the bottom guide groove. The process is efficient and stable, and the vibrating sieve process is efficient, which can effectively improve the efficiency of the overall pharmaceutical tablet production process; When the above-mentioned vibrating screening frame 202 relies on the eccentric wheel structure of the micro-vibrating motor 207 to achieve continuous vibrating screening, the limit rings 204 connected on both sides thereof are set through the inner rubber ring 205 of the inner wall and the limit piles 206 to keep the vibrating screening range within the limit and avoid large-scale shaking that affects the stable operation of the overall equipment. The screening cable 208 connected to the inner frame of the vibrating screening frame 202 is connected to the inner frame slide groove 212 through the regulating sliders 209 at both ends, and forms a screen by crossing each other. This screen can be adjusted through the regulating sliders 209 connected at both ends of the screening cable 208 and the pulley 211 connected by the double-end motor 210. The multiple groups of regulating sliders 209 can control the distance between the sliding expansion and contraction in an equidistant state, thereby forming different specifications of the screening screen, so as to cope with round tablets of different sizes, thereby maintaining a controllable screening process, maintaining high adaptability, and reducing the complexity of the preparation process.

[0022] like Figure 7 As shown, the conveyor chain 3 includes a chain frame 301, and a conveying groove 302 is opened on the inner wall of the chain frame 301, a conveyor belt 303 is arranged in the middle of the conveyor groove 302, and a diverter plate 304 is connected to the outer wall around the conveyor belt 303, and servo motors 305 are connected to both ends of the chain frame 301; In order to maintain the quantitative delivery of tablets after sieving, such as Figure 7 As shown, by docking one end of the chain frame 301 with the discharge rack 213, the discharge rack 213 can conveniently discharge the tablets stably on the chain frame 301, and the tablets are transported through the inner inclined conveying groove 302 inside the chain frame 301. At the same time, with the discharge process, the transmission of the conveyor belt 303 and the discharge efficiency of the discharge rack 213 are kept unified, so that the tablets can be quantitatively transported in conjunction with the diverter plates 304 distributed around the conveyor belt 303, so that the conveying structure can be replaced at the position of the collecting box 102 at the other end of the chain frame 301 to maintain the quantitative conveying process, and the collection box 102 can be replaced without choosing to collect the processed tablets in a stable process.

[0023] In summary, when the tablet forming device with a controllable screening structure for manufacturing pharmaceutical tablets is used, the operation process includes: When using this tablet forming device, the medicine powder to be manufactured can be mixed and prepared in advance according to the proportion of the manufactured tablets, and then the processed medicine powder is poured into the tablet pressing component 103 through the barrel 104. During the process, a dust-free environment must be maintained. After the medicine powder enters the tablet pressing component 103, the medicine is filled into the material tray. During the process, the feeding speed is controlled according to the given process parameters. Then the rear scraper pushes the excess medicine back into the material tray to ensure that the medicine powder is evenly distributed. Then the mold rotates and descends through the mold to compress the medicine. After the mold is preheated, the machine will distribute enough pressure to deform the powder and granular medicine and fix it in the space inside the mold to form tablets. Then the mold rises and opens, and the tablet formed by compression is ejected to the vibration screen frame 202 below for screening. Then the micro vibration motor 207 operates to drive the vibration screen frame 202 to perform the vibration screening process, and the powder screening process is performed through the screening cable 208. The screening cable 208 needs to be adapted to the size of the produced tablets before screening. It should be adjusted, and the double-end motor 210 is regulated by the external control panel to drive the pulley 211 to rotate and provide power, so that the regulating slider 209 where the double-end motor 210 is located slides and cooperates in the slide groove 212 of the inner frame of the vibrating screen frame 202, forming an expansion and contraction sliding process, and in the process, the spacing between the regulating sliders 209 continues to maintain an equidistant arrangement state, forming a regulated screening cable 208 that meets the requirements, and then the tablets complete the powder removal and impurity removal process during the continuous screening process, and the top fan 201 blows a light breeze to assist the tablets in stable powder removal during vibration screening, and the bottom waste box 214 can collect and process dust or broken tablets, and after completion, the tablets are discharged to the discharge rack 213 with vibration, and then the discharge rack 213 discharges the tablets into the conveying trough 302, and the conveyor belt 303 in the conveying trough 302 and the arranged diverter plate 304 are used to divert and quantitatively transport the tablets, and finally fall into the collection box 102 or a replacement conveying structure, and the user can continuously take out or periodically perform collection operations.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tablet forming device with a controllable screening structure for manufacturing pharmaceutical tablets, comprising a tablet press (1), characterized in that: A screening chamber (2) is provided inside one side of the tablet press (1), and a conveying chain (3) is provided at the bottom of the screening chamber (2); the screening chamber (2) comprises a fan (201), and a vibrating screen frame (202) is provided at the bottom of the fan (201); baffles (203) are connected to the top surfaces of both sides of the vibrating screen frame (202), and limiting rings (204) are distributed at both ends of the baffles (203); an inner rubber ring (205) is attached to the inner wall of the limiting ring (204), and a limiting pile (206) is provided on the inner diameter of the inner rubber ring (205) and a gap is reserved; the bottom of the vibrating screen frame (202) is connected to the bottom of the vibrating screen frame (202) on all sides; A micro-vibration motor (207) is provided, and the inner frame of the vibrating screen frame (202) is cross-arranged with screening cables (208), both ends of the screening cables (208) are connected to regulating sliders (209), and a double-end motor (210) is arranged inside the regulating slider (209), both ends of the double-end motor (210) are connected to pulleys (211), and both sides of the regulating slider (209) are arranged equidistantly with slide grooves (212) provided along the inner frame of the vibrating screen frame (202), one end of the vibrating screen frame (202) is provided with a discharge frame (213), and a waste box (214) is provided at the bottom of the vibrating screen frame (202).

2. A tablet forming device with a controllable screening structure for manufacturing pharmaceutical tablets according to claim 1, characterized in that: The sieve cables (208) and the regulating sliders (209) connected at both ends are cross-arranged in a mesh along the slide groove (212) structure of the inner frame of the vibrating screen frame (202), and the sieve cables (208) are woven and formed using nylon fibers.

3. The tablet forming device with a controllable screening structure for manufacturing pharmaceutical tablets according to claim 1, characterized in that: The regulating slider (209) is slidably matched with the inner frame of the vibrating screen frame (202) via a pulley (211), and the vibrating screen frame (202) is connected and fixed to the cavities on both sides of the sieving cavity (2) via micro-vibrating motors (207) distributed at both ends.

4. The tablet forming device with a controllable screening structure for manufacturing pharmaceutical tablets according to claim 1, characterized in that: The two ends of the vibrating screen frame (202) are sleeved on the outer wall of the limiting pile (206) through the limiting ring (204), and the limiting pile (206) is connected and fixed to the cavity bodies on both sides inside the screening cavity (2).

5. The tablet forming device with a controllable screening structure for manufacturing pharmaceutical tablets according to claim 1, characterized in that: The tablet press (1) comprises an outer frame (101), wherein a collecting box (102) is engaged inside the outer frame (101), a tablet pressing assembly (103) is arranged on one side of the top end of the outer frame (101), and a barrel (104) is connected to the top end of the tablet pressing assembly (103), and glass covers (105) are distributed around the tablet pressing assembly (103).

6. A tablet forming device with a controllable screening structure for manufacturing pharmaceutical tablets according to claim 5, characterized in that: One side of the top end of the outer frame (101) is connected and fixed to the glass cover (105) and the tablet pressing assembly (103), and the top end of the tablet pressing assembly (103) is in communication with the barrel (104).

7. The tablet forming device with a controllable screening structure for manufacturing pharmaceutical tablets according to claim 1, characterized in that: The conveyor chain (3) comprises a chain frame (301), and a conveying groove (302) is provided on the inner wall of the chain frame (301), a conveyor belt (303) is provided in the middle of the conveyor groove (302), and the outer walls around the conveyor belt (303) are connected to diverter plates (304), and servo motors (305) are connected to both ends of the chain frame (301).

8. A tablet forming device with a controllable screening structure for manufacturing pharmaceutical tablets according to claim 7, characterized in that: The conveying trough (302) is inclined along the inner walls on both sides of the chain frame (301), and the outer walls on both sides of the chain frame (301) are fixedly connected to the inner walls on both sides of the screening chamber (2).

9. The tablet forming device with a controllable screening structure for manufacturing pharmaceutical tablets according to claim 7, characterized in that: The two ends of the conveyor belt (303) form a transmission structure through a servo motor (305) and a chain frame (301), and the diverter plates (304) are arranged at equal distances along the outer walls around the conveyor belt (303).

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