CN110920128A - High-speed powder tablet press - Google Patents
High-speed powder tablet press Download PDFInfo
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- CN110920128A CN110920128A CN201911293043.2A CN201911293043A CN110920128A CN 110920128 A CN110920128 A CN 110920128A CN 201911293043 A CN201911293043 A CN 201911293043A CN 110920128 A CN110920128 A CN 110920128A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
- B30B11/14—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with moulds on a movable carrier other than a turntable or a rotating drum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
- B30B11/08—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with moulds carried by a turntable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
- B30B11/027—Particular press methods or systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/0023—Drive arrangements for movable carriers, e.g. turntables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
- B30B15/028—Loading or unloading of dies, platens or press rams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/30—Feeding material to presses
- B30B15/302—Feeding material in particulate or plastic state to moulding presses
- B30B15/308—Feeding material in particulate or plastic state to moulding presses in a continuous manner, e.g. for roller presses, screw extrusion presses
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Medical Preparation Storing Or Oral Administration Devices (AREA)
Abstract
The invention discloses a high-speed powder tablet press, which comprises a rack and a rotating mechanism arranged at the bottom of the rack, wherein a lifting top tower is arranged at the top of the rack, and a rotating tower driven by the rotating mechanism to rotate is arranged below the top tower; the lower part of the top tower is provided with an upper rail, the workbench at the lower part of the lower tower is provided with a lower rail, the punches of the upper punch and the lower punch are respectively kept in the arc-shaped guide grooves on the upper rail and the lower rail, and the punches of the upper punch and the lower punch respectively pass through the upper guide holes and the lower guide holes of the upper tower and the lower tower and oppositely extend into the middle die hole of the middle die; the upper punch and the lower punch respectively reciprocate up and down in the upper guide hole and the lower guide hole along with the rotation of the turret and according to a rotating path formed by the upper track and the lower track, and the upper punch and the lower punch move in a combined manner and complete the punching of the medicinal powder in the middle die under the pressure action of the pre-pressing wheel and the main pressing wheel. The invention has high operation efficiency, does not generate resonance phenomenon, and can ensure that the medicinal powder is fully extruded and molded in the process of high-speed rotation.
Description
Technical Field
The invention relates to the technical field of pharmaceutical equipment, in particular to a high-speed powder tablet press.
Background
The high-speed tablet press is used for pressing various granular raw materials into round tablets and special-shaped tablets, and is basic equipment suitable for batch production. The speed of the rotary disc, the filling depth of the materials and the thickness of the tablet can be adjusted during tabletting. The powder suction box is arranged in the machine, dust generated when the machine rotates can be sucked through the suction nozzle, bonding and blocking are avoided, and raw materials can be recycled. Under the condition of high-speed operation, in order to ensure the stability of tablet quality, the material needs to be conveyed at a constant speed and smoothly, and the patent with the publication number of CN2686845Y discloses a mechanism for measuring the tablet pressing force by a pressure sensor, wherein a strain gauge is used for measuring the pressure of a pressing wheel, so as to ensure the tablet forming pressure.
At present, the existing tablet presses in the market mostly take middle and small sizes as main parts, and the number of the turret punches is below 40, because too many punches can cause serious resonance phenomenon in the process of high-speed rotation of equipment.
Disclosure of Invention
Based on the defects of the prior art, the technical problem to be solved by the invention is to provide a powder high-speed tablet press, which has high operation efficiency, does not generate resonance phenomenon, and can ensure that the powder is fully extruded and formed in the process of high-speed rotation.
The core technical idea of the invention is to design a large-size tablet pressing mechanism, which comprises a turret with a large disc diameter and a punch guide track, wherein an upper punch and a lower punch do up-and-down reciprocating motion according to a rotating path formed by the track in the running process, when the distance between the surface of the upper punch and the surface of the lower punch is the largest, a material feeding shoe adds medicinal powder into a middle die hole through an impeller, then the upper punch and the lower punch continue to rotate, the punch respectively passes through a pre-pressing wheel and a main pressing wheel, the two times of extrusion on the medicinal powder are finished in the middle die, finally, a formed tablet is ejected out of the middle die by the lower punch, and a special tablet scraping plate scrapes. In the process, in order to ensure that the phenomenon of powder bridging can not occur when the powder is filled into the middle die from the material supply boot, the material supply boot is internally stirred in a double-impeller mode, and after the upper punch and the lower punch complete prepressing action in the middle die, the upper punch and the lower punch can be integrated to move upwards for exhausting, and then the upper punch and the lower punch can collectively move downwards to enter the main pressing wheel.
In order to achieve the purpose, the invention adopts the following technical measures:
a high-speed powder tablet press comprises a rack and a rotating mechanism arranged at the bottom of the rack, and is characterized in that a lifting top tower is arranged at the top of the rack, and a rotating tower driven by the rotating mechanism to rotate is arranged below the top tower;
the turret comprises an upper tower, a middle tower and a lower tower which are sequentially arranged from top to bottom, wherein a middle die is arranged on the middle tower, upper guide holes and lower guide holes which are circumferentially distributed are respectively arranged in the upper tower and the lower tower, and middle die holes which are circumferentially distributed and correspond to the upper guide holes and the lower guide holes in the up-down direction are arranged in the middle die;
a material supply boot for supplying materials into the middle mould hole is arranged on the middle tower;
the lower part of the top tower is provided with an upper rail, the workbench at the lower part of the lower tower is provided with a lower rail, the punches of the upper punch and the lower punch are respectively kept in the arc-shaped guide grooves on the upper rail and the lower rail, and the punches of the upper punch and the lower punch respectively pass through the upper guide hole and the lower guide hole of the upper tower and the lower tower and oppositely extend into the middle die hole of the middle die;
and a pair of pre-pressing wheels and a pair of main pressing wheels are respectively arranged above the upper punch and below the lower punch, the upper punch and the lower punch respectively reciprocate up and down in the upper guide hole and the lower guide hole along with the rotation of the turret and according to a rotating path formed by the upper track and the lower track, and the upper punch and the lower punch move in a combined manner and complete the punching of the medicinal powder in the middle die under the pressure action of the pre-pressing wheels and the main pressing wheels.
Preferably, the upper punches include a first upper punch, a second upper punch, a third upper punch, a fourth upper punch, a fifth upper punch and a sixth upper punch, and the punches of the upper punches are mushroom-shaped; the lower punches comprise a first lower punch, a second lower punch, a third lower punch, a fourth upper punch, a fifth upper punch and a sixth lower punch, and the punches of the lower punches are mushroom-shaped.
Furthermore, the feeding shoe comprises an upper part and a lower part, and a cavity formed by the upper part and the lower part is internally provided with a first impeller and a second impeller respectively; the lower part of the feeding boot is provided with a discharge hole at the joint of the first impeller and the second impeller, and the upper part of the feeding boot is connected with the hopper through a feed delivery pipe; the first impeller and the second impeller are respectively driven by separate motors.
Optionally, a guide post is installed at the top of the frame, and the top tower is installed on the guide post; the lifting guide post is characterized in that a motor base is installed on the guide post, a lifting motor is installed on the motor base, an output shaft of the lifting motor is connected with a speed reducer, and an output shaft of the speed reducer is connected with the lifting guide post through a coupler.
Furthermore, the middle mold is cylindrical, a circular groove is formed in the outer circular surface of the middle mold, a threaded hole is formed in the outer circular surface of the middle tower in the radial line direction, a middle mold jackscrew is installed in the threaded hole, and the middle mold jackscrew is tightly jacked in the circular groove of the middle mold; the outer circular surface of the lower tower is provided with a unthreaded hole in the radial line direction, a lower electromagnet is arranged in the unthreaded hole, one end of the lower electromagnet is processed into a circular arc shape and has magnetism, and the other end of the lower electromagnet is clamped on the outer circular surface of the lower tower through a boss.
Optionally, the upper track and the lower track are formed into a complete annular track by splicing a plurality of split tracks, a bayonet and a tenon are arranged between two adjacent tracks, and the upper track and the lower track are connected in series by clamping the bayonet and the tenon.
Optionally, four side surfaces of the turret are provided with columns, the columns are directly mounted on the base, and the columns, the sealing glass and the workbench form a sealed operation space together; the upright post is provided with an air inlet device and an air exhaust device, and the air inlet device is connected with an external air filter.
Furthermore, a discharge chute is arranged on the upright post, the extending part of the discharge chute is connected with an external spiral screening machine, and the feed inlet of the discharge chute is aligned with the discharge position of the middle tower. And the discharge chute is provided with a pneumatic waste removing mechanism, and after the system detects that the weight of the unqualified tablets does not meet the requirement, a waste removing valve of the pneumatic waste removing mechanism is opened to remove the unqualified tablets and a batch of tablets before and after the tablets.
Preferably, the rotating mechanism comprises a servo motor and a reduction gearbox connected with the servo motor, the reduction gearbox is mounted on the rack, and the power of the servo motor is transmitted into the reduction gearbox through a synchronous belt and a belt wheel; the lower tower is connected with an output shaft of the reduction gearbox through a column cap pin, a threaded hole is machined in the output shaft, and the locking guide pillar penetrates through the threaded hole.
In order to ensure that the tablet press does not generate resonance phenomenon in a high-speed running state, the rotary tower is arranged on an output shaft of a speed reducer, the speed reducer is arranged on the frame, the upper part of the rotary tower is connected with a top tower through a bearing, the top tower is inserted into the frame through a guide column, and the four side surfaces of the rotary tower are provided with stand columns. The upright post is directly arranged on the base.
Compared with the prior art, the powder high-speed tablet press has the beneficial effects and advantages that:
(1) the powder high-speed tablet press can realize 40-60 punch/rotation continuous punching, and greatly improves the operation efficiency compared with the traditional 38 punch tablet press.
(2) The invention adopts two systems of pre-pressing and main pressing to realize the twice stamping of the powder, can ensure that the powder is fully extruded and molded in the process of high-speed rotation, and ensures the hardness of the molded tablet.
(3) The feeding boot of the invention adopts a double-impeller mechanism to realize the filling of the powder, ensures that the powder can fully enter the middle die hole, and avoids the bridging phenomenon of the powder.
(4) The jacking tower lifting mechanism is arranged at the top of the tablet press, and can automatically complete the lifting of the jacking tower through the lifting motor, so that convenience is provided for the replacement and cleaning of the turret.
(5) According to the invention, the magnets are arranged on the circumferential surface of the lower tower part of the turret, so that proper pre-tightening force can be provided for the lower punch, and the phenomenon that the punch descends in the process that the lower punch rotates out of the track and does not contact the pressing wheel is avoided.
(6) The middle die jackscrew ensures that the middle die can be replaced at any time, facilitates the production of tablets with various sizes, does not need to disassemble the turret in the replacement process, and improves the operation efficiency.
Drawings
Fig. 1 is a front view of a powder high-speed tablet press according to a preferred embodiment of the present invention.
Fig. 2 is a side view of the high speed powder tablet press of the present invention.
Fig. 3 is a schematic blanking diagram of the high-speed powder tablet press of the present invention.
Fig. 4 is a perspective view of a feed shoe of the high-speed powder tableting machine of the present invention.
Fig. 5 is a perspective view of a turret of the powder high-speed tablet press of the present invention.
Fig. 6 is a schematic diagram of the tabletting of the high-speed powder tabletting machine of the present invention.
Fig. 7 is a perspective view of the high-speed powder tableting machine of the present invention.
Fig. 8 is a schematic view of the lifting and lowering of the top tower of the high-speed powder tableting machine of the present invention.
Fig. 9 is a top turret compression diagram of the high speed powder tablet press of the present invention.
Fig. 10 is a perspective view of a portion of the track of the high-speed powder tableting machine of the present invention.
Fig. 11 is a front view of a portion of the track of the high speed powder tablet press of the present invention.
Wherein: 1. a hopper, 2, a top tower, 3, a turret, 4, a workbench, 5, a discharge chute, 6, an air inlet device, 7, a vertical column, 8, an electric control cabinet, 9, an exhaust fan, 10, a reduction gearbox, 101, an output shaft, 11, a main motor, 12, a base, 13, sealing glass, 14, a first impeller, 15, a second impeller, 16, a discharge port, 17, a middle die, 18, a feed shoe, 191, a middle die jackscrew, 192, a lower punch magnet, 20, an upper tower, 201, an oil scraper ring, 21, a middle tower, 22, a lower tower, 23, a main shaft, 24A, a first upper punch, 24B, a second upper punch, 24C, a third upper punch, 24D, a fourth upper punch, 24E, a fifth upper punch, 24F, a sixth upper punch, 25A, a first lower punch, 25B, a second lower punch, 25C, a third lower punch, 25D, a fourth lower punch, 25E, a fifth lower punch, 25F, a sixth punch, 26, a middle die, 27 and a motor, 28. guide post, 29, lifting motor, 30, lifting guide post, 31, locking guide post, 32, upper track, 321, arc guide way, 33, lower track.
Detailed Description
As shown in fig. 1 to 11, the high-speed powder tablet press according to the embodiment of the present invention includes a frame and a rotating mechanism installed at the bottom of the frame, wherein a liftable top tower 2 is installed at the top of the frame, a guide post 28 is installed at the top of the frame, the top tower 2 is installed on the guide post 28, the number of the guide posts 28 is two, the bottom of the guide post 28 is installed on the frame, and the top tower 2 is supported at 3 points by the two guide posts 28 and a turret. The motor base 27 is installed on the guide post 28, the lifting motor 29 is installed on the motor base 27, an output shaft of the lifting motor 29 is connected with the speed reducer, an output shaft of the speed reducer is connected with the lifting guide post 30 through the coupler, the lifting motor 29 and the speed reducer drive the top tower 2 to lift upwards and descend, and convenience is provided for replacement and cleaning of the turret 3.
The rotating tower 3 driven by the rotating mechanism to rotate is arranged below the top tower 2, the rotating tower 3 comprises an upper tower 20, a middle tower 21 and a lower tower 22, a middle die 17 is arranged on the middle tower 21, the middle die 17 is of a cylindrical structure, a circular groove is formed in the cylindrical outer circular surface of the middle tower 21, a middle die hole 26 is formed in the middle die 17, a threaded hole is formed in the outer circular surface of the middle tower 21 in the radial line direction, a middle die jackscrew 191 is installed in the threaded hole, the middle die jackscrew 191 is tightly jacked in the circular groove of the middle die 17, an unthreaded hole is formed in the outer circular surface of the lower tower 22 in the radial line direction, a lower punching magnet 192 is installed in the unthreaded hole, one end of the lower punching magnet 192 is processed into a circular arc shape and has magnetism, the other end of the magnet is clamped on the outer circular surface of the lower tower 22 through a boss, the magnetic surface of the lower punching magnet 192 is in contact with a lower punching body, and the lower punching cannot fall off from a lower guide hole (punching hole) of the lower.
As a specific embodiment of the invention, the middle mold 17 enters through the upper surface of the middle tower 21 when being installed, and after the middle mold jackscrew 191 is locked, the flatness of the joint of the upper surface of the middle mold 17 and the upper surface of the middle tower 21 must be ensured not to exceed 0.05 mm.
The rotating mechanism comprises a servo motor 11 and a reduction gearbox 10 connected with the servo motor 11, wherein the reduction gearbox 10 is installed on a rack, the power of the servo motor 11 is transmitted into the reduction gearbox 10 through a synchronous belt and a belt pulley, a lower tower 22 is connected with an output shaft 101 of the reduction gearbox 10 through a column cap pin, a threaded hole is machined in the output shaft 101, a locking guide pillar 31 penetrates through the threaded hole, the locking guide pillar 31 locks an upper tower 20, a middle tower 21 and the lower tower 22 together, and the turret 3 is driven to rotate through the servo motor 11 and the reduction gearbox 10. The invention adopts the servo motor 11 as the main motor, the servo motor 11 is arranged on the equipment base, and the power of the servo motor 11 is transmitted into the reduction box through the synchronous belt and the belt wheel. The invention can adopt a direct drive motor as a main motor, and the motor is directly arranged at the bottom of the reduction gearbox.
As shown in fig. 5, an oil scraper ring 201 is installed in the hollow cavity of the upper tower 20, a first upper punch 24A, a second upper punch 24B, a third upper punch 24C, a fourth upper punch 24D, a fifth upper punch 24E and a sixth upper punch 24F are installed in the oil scraper ring 201, punches of the upper punches are mushroom-shaped, mushroom-shaped punches of the upper punches are installed in the upper rail 32, punches of the first upper punch 24A, the second upper punch 24B, the third upper punch 24C, the fourth upper punch 24D, the fifth upper punch 24E and the sixth upper punch 24F penetrate through the oil scraper ring 201 and then are inserted into the middle mold 17, punches of the lower tower 22 penetrate through the first lower punch 25A, the second lower punch 25B, the third lower punch 25C, the fourth upper punch 25D, the fifth upper punch 25E and the sixth lower punch 25F, the punches of the lower punches are mushroom-shaped, and mushroom-shaped punches of the lower punch are installed in the lower. An upper rail 32 is fixedly installed at the lower portion of the top tower 2, a lower rail 33 is fixedly installed at the table 4 at the lower portion of the lower tower 22, the upper and lower punches are respectively held in the arc-shaped guide grooves 321 of the upper and lower rails 32 and 33, and the upper and lower punches respectively pass through the upper and lower guide holes of the upper and lower towers 20 and 22 and are relatively inserted into the middle mold hole 26 of the middle mold 17. A pair of pre-pressing wheels 40 and a main pressing wheel 50 are respectively arranged above the upper punch and below the lower punch, the upper punch and the lower punch respectively reciprocate up and down in the upper guide hole and the lower guide hole along with the rotation of the turret 3 and according to a rotating path formed by the upper rail 32 and the lower rail 33, and the upper punch and the lower punch move in a combined manner and complete the punching of the medicinal powder in the centering die 17 under the pressure action of the pre-pressing wheels 40 and the main pressing wheel 50.
In addition, the specifications of the upper punch and the lower punch of the invention are consistent, the middle die 17 is matched with the upper punch and the lower punch, the upper punch and the lower punch are divided into three parts, namely a mushroom head, a large-diameter punch rod and a small-diameter punch rod, the diameter of the small-diameter punch rod of the upper punch and the lower punch rod is equal to the inner diameter of the middle die hole 26, the mushroom head is circumferentially guided, the large-diameter punch rod is vertically guided, and the small-diameter punch rod punches medicinal powder. The combined movement of the upper punch and the lower punch completes the punching of the medicinal powder, the movement of the punch is maintained by the arc track formed in the track, the fixed positions of the upper track and the lower track are provided with lubricating oil nozzles, and the punch is periodically lubricated by lubricating grease by a special oil pump.
In an embodiment of the present invention, the contact surface of the lower punch magnet 192 and the lower punch is in the shape of a circular arc, and the diameter of the arc is equal to the outer diameter of the large diameter punch of the lower punch.
In addition, the feeding shoe 18 is installed on the middle tower 21 of the invention, the feeding shoe 18 comprises an upper part and a lower part, a first impeller 14 and a second impeller 15 are installed in a cavity formed by the upper part and the lower part, a discharge hole 16 is arranged at the joint of the first impeller 14 and the second impeller 15 at the lower part of the feeding shoe 18, the upper part of the feeding shoe 18 is connected with the hopper 1 through a feed delivery pipe, and the first impeller 14 and the second impeller 15 are driven by a single motor. The first impeller 14 is a driving wheel, a rotating shaft of the impeller is directly connected with an impeller motor, the second impeller 15 is a driven wheel, and synchronous belt wheels are arranged on the rotating shafts of the first impeller 14 and the second impeller 15 and are connected through a synchronous toothed belt.
Further, the transmission systems of the first impeller 14 and the second impeller 15 are installed in a transmission cavity in the feeding shoe 18, and the transmission cavity and the impeller cavity are sealed and isolated by a sealing gasket. The transmission system of the first impeller 14 and the second impeller 15 may also be installed in the upper part of the tower 2.
Preferably, the upper track 32 and the lower track 33 can be formed into a complete annular track by splicing a plurality of split tracks, a bayonet and a tenon are arranged between two adjacent tracks, and the smooth degree of the joint of the tracks is ensured through the bayonet and the tenon when the tracks are connected in series.
In addition, the frame of the invention is arranged on a base 12, and upright posts 7 are arranged at four corners of the base 12. The upright post 7, the sealing glass 13 and the workbench 4 jointly form a sealed working space, the upright post 7 is provided with an air inlet device 6 and an air outlet device 9, and the air inlet device 6 is connected with an external air filter. The sealing glass 13 is installed on four sides of the top tower 2 through air springs, and the surface of the resin glass is provided with a groove for installing a sealing rubber strip.
And, the column 7 is provided with a discharge chute 5, the extension part of the discharge chute 5 is connected with an external spiral screening machine, and the feed inlet of the discharge chute 5 is aligned with the piece outlet position of the middle tower 21. The pneumatic waste rejecting mechanism is arranged on the discharge chute 5, and the principle is that after the system detects the unqualified tablet with partial weight not meeting the requirement, the waste rejecting valve is opened to reject the unqualified tablet and a batch of tablets before and after the tablet.
An electric control cabinet 8 is arranged beside the frame and used for controlling electrical elements in the powder high-speed tablet press.
The working principle of the high-speed powder tableting machine of the present invention will now be briefly described with reference to fig. 1 to 11 in conjunction with the description of the above structural features:
the servo motor 11 drives the turret 3 to rotate when working, the turret 3 drives the upper punch and the lower punch to do up-and-down reciprocating motion according to a rotating path formed by tracks after rotating, when the distance between the surface of the upper punch and the surface of the lower punch is maximum, the material supply shoe 18 adds medicine powder into the middle die hole 26 through the impeller, then the upper punch and the lower punch continue to rotate and the punch respectively passes through the pre-pressing wheel 40 and the main pressing wheel 50 to complete two times of extrusion of the medicine powder in the middle die 17, finally the formed tablet is ejected out of the middle die 17 by the lower punch, and is scraped into the discharge chute 5 by a special scraper plate. In the process, in order to ensure that the powder does not bridge when the powder is filled into the middle die 17 from the material supply shoe 18, the material supply shoe 18 is internally stirred in a double-impeller mode, and after the upper punch and the lower punch complete the pre-pressing action in the middle die 17, the upper punch and the lower punch can integrally move upwards to exhaust gas and then collectively move downwards to enter the main pressing wheel.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can understand that the modifications or substitutions within the technical scope of the present invention should be included in the scope of the present invention.
Claims (10)
1. A high-speed powder tablet press comprises a rack and a rotating mechanism arranged at the bottom of the rack, and is characterized in that a lifting top tower (2) is arranged at the top of the rack, and a rotating tower (3) driven by the rotating mechanism to rotate is arranged below the top tower (2);
the rotary tower (3) comprises an upper tower (20), a middle tower (21) and a lower tower (22) which are sequentially arranged from top to bottom, a middle die (17) is installed on the middle tower (21), upper guide holes and lower guide holes which are circumferentially distributed are respectively arranged in the upper tower (20) and the lower tower (22), and middle die holes (26) which are circumferentially distributed and correspond to the upper guide holes and the lower guide holes in the up-down direction are arranged in the middle die (17);
the middle tower (21) is provided with a material feeding boot (18) for feeding materials into the middle die hole (26);
an upper rail (32) is arranged at the lower part of the top tower (2), a lower rail (33) is arranged on a workbench (4) at the lower part of the lower tower (22), upper punches and lower punches are respectively kept in arc-shaped guide grooves on the upper rail (32) and the lower rail (33), and upper punches and lower punches respectively penetrate through upper guide holes and lower guide holes of the upper tower (20) and the lower tower (22) and oppositely extend into a middle die hole (26) of a middle die (17);
a pair of pre-pressing wheels (40) and a main pressing wheel (50) are respectively arranged above the upper punch and below the lower punch, the upper punch and the lower punch respectively reciprocate in the upper guide hole and the lower guide hole along with the rotation of the turret (3) and according to a rotating path formed by the upper rail (32) and the lower rail (33), and the upper punch and the lower punch move in a combined manner and complete the punching of the medicinal powder in the middle die (17) under the pressure action of the pre-pressing wheels (40) and the main pressing wheel (50).
2. A powder high speed tablet press according to claim 1, wherein the upper punches comprise a first upper punch (24A), a second upper punch (24B), a third upper punch (24C), a fourth upper punch (24D), a fifth upper punch (24E) and a sixth upper punch (24F), the upper punches being of mushroom type;
the undershoot comprises a first undershoot (25A), a second undershoot (25B), a third undershoot (25C), a fourth overshoot (25D), a fifth overshoot (25E) and a sixth undershoot (25F), and the undershoot is mushroom-shaped.
3. A high-speed powder tablet press according to claim 1, wherein the feed shoe (18) comprises an upper part and a lower part, the upper part and the lower part forming a cavity in which the first impeller (14) and the second impeller (15) are mounted, respectively;
a discharge hole (16) is formed in the lower part of the feeding boot (18) at the joint of the first impeller (14) and the second impeller (15), and the upper part of the feeding boot (18) is connected with the hopper (1) through a conveying pipe;
the first impeller (14) and the second impeller (15) are respectively driven by a single motor.
4. The high-speed powder tablet press according to claim 1, wherein the frame is mounted at the top with guide posts (28) and the head tower (2) is mounted on the guide posts (28);
the guide post is characterized in that a motor base (27) is installed on the guide post (28), a lifting motor (29) is installed on the motor base (27), an output shaft of the lifting motor (29) is connected with a speed reducer, and an output shaft of the speed reducer is connected with a lifting guide post (30) through a coupler.
5. The high-speed powder tablet press according to claim 1, wherein the middle die (17) is cylindrical, and has a circular groove on its outer circumferential surface, and the outer circumferential surface of the middle tower (21) has a threaded hole along radial direction, and a middle die jackscrew (191) is installed in the threaded hole, and the middle die jackscrew (191) is tightly pressed in the circular groove of the middle die (17);
the outer circular surface of the lower tower (22) is provided with a unthreaded hole in the radial line direction, a lower electromagnet (192) is arranged in the unthreaded hole, one end of the lower electromagnet (192) is processed into an arc shape and has magnetism, and the other end of the lower electromagnet (192) is clamped on the outer circular surface of the lower tower (22) through a boss.
6. The high-speed powder tableting machine according to claim 1, wherein the upper rail (32) and the lower rail (33) are formed by splicing a plurality of split rails to form a complete circular rail, and a bayonet and a tenon are provided between two adjacent rails, and the upper rail (32) and the lower rail (33) are connected in series by the bayonet and tenon.
7. The high-speed powder tablet press according to claim 1, wherein four sides of the turret (3) are provided with columns (7), the columns (7) are directly arranged on the base (12), and the columns (7), the sealing glass (13) and the working table (4) form a sealed working space together;
install air inlet ware (6) and exhaust ware (9) on stand (7), air inlet ware (6) are connected with outside air cleaner.
8. A high-speed powder tablet press according to claim 7, wherein the upright (7) is fitted with an ejection chute (5), the extension of the ejection chute (5) being connected to an external screw sifter, the feed opening of the ejection chute (5) being aligned with the ejection position of the turret (21).
9. The high-speed powder tablet press according to claim 8, wherein the discharge chute (5) is provided with a pneumatic reject mechanism, and when the system detects an unsatisfactory tablet with an unbalanced weight, a reject valve of the pneumatic reject mechanism is opened to reject a batch of tablets including the unsatisfactory tablet and a batch of tablets before and after the unsatisfactory tablet.
10. The powder high-speed tablet press according to claim 1, wherein the rotating mechanism comprises a servo motor (11) and a reduction box (10) connected with the servo motor (11), the reduction box (10) is mounted on a frame, and the power of the servo motor (11) is transmitted into the reduction box (10) through a synchronous belt and a belt wheel;
the lower tower (22) is connected with an output shaft (101) of the reduction gearbox (10) through a column cap pin, a threaded hole is machined in the output shaft (101), and a locking guide pillar (31) penetrates through the threaded hole.
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| CN110920128B (en) | 2021-08-24 |
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