A tablet press for pressing double-sided tablets with words

Abstract

The invention discloses a tablet press for pressing double-sided tablets with words, which is used to solve the problem that the words on the upper and lower surfaces of tablets pressed by traditional tablet presses are not correct. The tablet press comprises a tablet press frame, on which a punching plate assembly and a forced feeder are installed. When the punching plate assembly rotates, an upper punch rod is pressed downward by an upper pressing wheel so that the bottom end of the upper punch rod enters a middle die hole, and a lower punch rod is pressed upward by a lower pressing wheel so that the head of the lower punch rod applies pressure to the material in the middle die hole, so that the material forms tablets with words on the upper and lower surfaces in the middle die, and the words on the upper and lower surfaces are aligned, the guide keyway is processed once, and the vertical direction precision is very high. During the rotation of the punching plate assembly, the upper punch rod and the lower punch rod can only move up and down but cannot rotate under the action of the guide rail and the punching plate keyway, thereby ensuring that the words on the upper and lower surfaces of the produced tablets are aligned; the needs of pharmaceutical factories for mass production of double-sided tablets with words are met; the production quality is stable, and large-scale continuous production is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of pharmaceutical machinery, in particular to a tablet press for pressing double-sided tablets with words on them. Background Art

[0002] High-speed tablet presses are widely used in the pharmaceutical industry. They produce tablets with high output and stable tablet quality. They can not only produce round tablets, special-shaped tablets, cartoon tablets, ring tablets and double-layer tablets, but also tablets with words on both sides. As pharmaceutical factories have higher and higher requirements for tablet quality, especially for tablets with words on both sides, the words on the top and bottom of the tablets must be aligned, which poses new challenges to tablet presses and tablet press molds. Improvements and innovations must be made to meet product quality requirements.

[0003] Usually, the upper and lower surfaces of the pressed round tablets are marked with convex characters on the upper and lower punch surfaces, and the tablets produced have concave characters on their surfaces. When the upper and lower punches are working, they move up and down around the guide rails, and at the same time, the punches rotate under the action of the guide rails. Therefore, the characters on the upper and lower surfaces of the pressed round tablets cannot be aligned, which looks unsightly. Some tablets are also designed with deep scoring lines in the middle, with scoring on both the upper and lower surfaces and they must be aligned. If you take half a tablet, you can easily break it off at the scoring point;

[0004] In the traditional processing technology, a keyway is first machined in each upper punch hole of the upper middle punch plate by inserting a keyway, and then a keyway is machined in each lower punch hole of the lower punch plate by inserting a keyway, and then the lower punch plate is assembled with the upper middle punch plate. Since there are n punch holes in a circle of the punch plate, such as 79 upper and lower punch holes, each punch hole has a keyway, and the upper and lower keyways of each punch hole have an error in the alignment direction, after installing the upper and lower punch rods, it is difficult to align the front and back fonts of each tablet with fonts pressed out. The tablet presses produced by many manufacturers do not have keys on the lower punch rods and keyways on the lower punch plates. When the tablet presses produce round tablets with fonts, the lower punch rod rotates in the lower punch hole under the friction of the guide rail, and the text directions of the upper and lower sides of the produced tablets are different. Summary of the invention

[0005] The embodiment of the present invention provides a tablet press for pressing double-sided tablets with words on them, which can solve the problem of incorrect characters on the upper and lower surfaces of tablets pressed by conventional tablet presses. The tablet press is applied to high-speed tablet presses, meeting the needs of pharmaceutical factories for mass production of double-sided tablets with words on them. The tablet press has stable production quality and can achieve large-scale continuous production.

[0006] The embodiment of the present invention provides a tablet press for pressing double-sided tablets with words, comprising a tablet press frame, on which a punching plate assembly and a forced feeder are installed, wherein the punching plate assembly comprises an upper punching plate, a middle punching plate, a lower punching plate, an upper punching rod, a middle die, a lower punching rod, an upper pressing wheel and a lower pressing wheel; a middle punching plate is installed below the upper punching plate, and a lower punching plate is installed below the middle punching plate;

[0007] The upper punch plate is evenly provided with a plurality of upper punch holes, an upper punch rod is inserted into the upper punch hole, an upper pressing wheel is installed above the upper punch rod, a plurality of middle die holes are evenly provided on the middle punch plate, a middle die is installed inside the middle die hole, a plurality of lower punch holes are evenly provided on the lower punch plate, a lower punch rod is inserted into the lower punch hole, and a lower pressing wheel is installed below the lower punch rod;

[0008] The tablet press frame is provided with a tablet discharge baffle on the lower punch plate, tablets are placed in the tablet discharge baffle, and one end of the tablet discharge baffle is connected to a tablet discharge box;

[0009] The upper punch hole and the lower punch hole are both provided with a guide keyway, the upper punch rod is provided with an upper punch rod key, the upper punch rod key is inserted into the guide keyway on the upper punch hole, and the lower punch rod is provided with a lower punch rod key, the lower punch rod is inserted into the guide keyway on the lower punch hole;

[0010] The upper punch rod is installed on the ascending guide rail, a punch baffle is installed above the ascending guide rail, a protective baffle is installed on one side of the punch baffle, a lower pressing guide rail is installed on one side of the protective baffle, an upper pre-pressing wheel is installed between the lower pressing guide rail and the upper pressing wheel, and a corresponding lower pre-pressing wheel is installed directly below the upper pre-pressing wheel;

[0011] A filling protection guide rail is installed on one side of the lower pre-pressing wheel, a filling guide rail is installed on one side of the filling protection guide rail, a filling quantitative guide rail is installed below the filling quantitative guide rail, a pull-down guide rail is installed on one side of the filling quantitative guide rail, a sheet-out protection guide rail is installed on one side of the pull-down guide rail, and a sheet-out guide rail is installed on one side of the sheet-out protection guide rail;

[0012] A material blocking rod is installed on one side of the forced feeder, and a powder scraper is installed on the other side of the forced feeder;

[0013] A power mechanism is installed at the bottom of the tablet press frame.

[0014] Preferably, the upper punch plate is fixedly connected to the middle punch plate and the lower punch plate by means of positioning pins and screws.

[0015] Preferably, the power mechanism includes a main motor, a motor pulley, a synchronous belt, a reducer pulley, a reducer and a main shaft; a motor pulley is installed on the output shaft end of the main motor, the motor pulley is connected to the reducer pulley through a synchronous belt, the reducer pulley is installed on the reducer, the reducer output shaft hole is connected to the bottom end of the main shaft, and the upper end of the main shaft is fixedly connected to the punch assembly.

[0016] Preferably, the upper punching hole, the middle die hole, and the lower punching hole correspond to each other one by one, and the upper punching hole, the middle die hole, and the lower punching hole are located on the same reference axis; the aperture of the middle die hole is larger than the apertures of the upper punching hole and the lower punching hole;

[0017] Preferably, one end of the upper punch rod and the lower punch rod is engraved with text respectively.

[0018] At least one of the above-mentioned technical solutions adopted in the embodiments of the present invention can achieve the following beneficial effects: when the punch plate assembly rotates, the upper punch rod is squeezed downward by the upper pressure wheel so that the bottom end of the upper punch rod enters the middle die hole, and the lower punch rod is squeezed upward by the lower pressure wheel so that the head of the lower punch rod applies pressure to the material in the middle die hole, and the material forms tablets with fonts on the upper and lower sides in the middle die, and the upper and lower fonts are aligned. Since the upper punch rod and the lower punch rod are respectively provided with an upper punch rod key and a lower punch rod key, the upper punch hole and the lower punch hole are both provided with a guide keyway, and the guide keyway is processed at one time, and the vertical direction accuracy is very high. During the rotation of the punch plate assembly, the upper punch rod and the lower punch rod can only move up and down but cannot rotate under the action of the guide rail and the punch plate keyway, thereby ensuring that the fonts on the upper and lower sides of the produced tablets are aligned. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 It is a sectional view of the overall structure of the tablet press of the present invention;

[0021] Figure 2 This is a schematic diagram of the coaxial upper and lower punching holes of the present invention;

[0022] Figure 3 This is a schematic diagram of the guide rail of the tablet press of the present invention;

[0023] Figure 4 It is a top view of the upper punch plate of the present invention.

[0024] Figure 5 It is a partial enlarged view of the tablet discharging baffle, tablets and tablet discharging box of the present invention;

[0025] Figure 6 It is a partial enlarged view of the punch disk assembly of the present invention. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] See also Figure 1-4 As shown, a tablet press for pressing double-sided tablets with words on them comprises a tablet press frame 1, on which a punch assembly 10 and a forced feeder 133 are mounted, wherein the punch assembly 10 comprises an upper punch 104, a middle punch 106, a lower punch 109, an upper punch rod 102, a middle die 105, a lower punch rod 107, an upper pressing wheel 101 and a lower pressing wheel 110; a middle punch 106 is mounted below the upper punch 104, and a lower punch 109 is mounted below the middle punch 106; the upper punch 104 and the middle punch 106 are fixed together by heat assembly, an upper punch hole 111 and a middle die hole 112 are processed, and then the processed lower punch 109 is fixed together with the upper punch 104 and the middle punch 106 by locating pins and screws to form the upper punch hole 111, the middle die hole 112 and the lower punch hole 113 coaxially, and then Then, the resistance wire is passed through the upper punch hole 111 through the middle die hole 112 and then through the lower punch hole 113. The guide key groove 114 is cut out in the upper punch hole 111 and the lower punch hole 113 by the wire cutting process. Since the aperture of the middle die hole 112 is larger than that of the upper punch hole 111 and the lower punch hole 113, no trace will be cut out in the middle die hole 112. Therefore, the method of processing the key groove in the upper and lower punching process is adopted to ensure that the guide key groove 114 cut out by the upper and lower punching is aligned; and the fonts on the upper punch rod 102 and the lower punch rod 107 correspond to the guide key groove 114; the middle die 105 is installed in the middle die hole 112, the upper punch rod 102 with key and word is installed in the upper punch hole 111 of the upper punch plate 104, and the lower punch rod 107 with key and word is installed in the lower punch hole 113 of the lower punch plate 109, and the installation is completed.

[0029] A plurality of upper punch holes 111 are evenly formed on the upper punch plate 104, an upper punch rod 102 is inserted into the upper punch hole 111, an upper pressing wheel 101 is installed above the upper punch rod 102, a plurality of middle die holes 112 are evenly formed on the middle punch plate 106, a middle die 105 is installed inside the middle die hole 112, a plurality of lower punch holes 113 are evenly formed on the lower punch plate 109, a lower punch rod 107 is inserted into the lower punch hole 113, and a lower pressing wheel 110 is installed below the lower punch rod 107.

[0030] The tablet press frame 1 is provided with a tablet discharge baffle 3 on the lower punch plate 109 , tablets 4 are placed in the tablet discharge baffle 3 , and one end of the tablet discharge baffle 3 is connected to a tablet discharge box 5 .

[0031] A guide keyway 114 is provided in both the upper punch hole 111 and the lower punch hole 113; an upper punch key 103 is installed on the upper punch rod 102, and the upper punch key 103 is inserted into the guide keyway 114 on the upper punch hole 111; a lower punch key 108 is installed on the lower punch rod 107, and the lower punch rod 107 is inserted into the guide keyway 114 on the lower punch hole 113.

[0032] In the prior art, because the punch rod is prone to rotate along the guide rail when moving in the mold, the upper punch rod 102 and the lower punch rod 107 are limited and fixed by the lower punch rod key 108, the upper punch rod key 103 and the guide keyway 114 to prevent the upper punch rod 102 and the lower punch rod 107 from rotating themselves.

[0033] The upper punch rod 102 is installed on the rising guide rail 121, a punch baffle 122 is installed above the rising guide rail 121, a protective baffle 123 is installed on one side of the punch baffle 122, a lower pressing guide rail 125 is installed on one side of the protective baffle 123, an upper pre-pressing wheel 126 is installed between the lower pressing guide rail 125 and the upper pressing wheel 101, and a corresponding lower pre-pressing wheel 128 is installed directly below the upper pre-pressing wheel 126.

[0034] A filling protection rail 129 is installed on one side of the lower pre-pressing wheel 128, a filling guide rail 130 is installed on one side of the filling protection rail 129, a filling quantitative guide rail 131 is installed below the filling quantitative guide rail 130, a pull-down guide rail 132 is installed on one side of the filling quantitative guide rail 131, a sheet discharge protection rail 135 is installed on one side of the pull-down guide rail 132, and a sheet discharge guide rail 136 is installed on one side of the sheet discharge protection guide rail 135.

[0035] After the tablet 4 is processed, the lower punch 107 is driven by the tablet discharge guide rail 136 to move upward to push the tablet 4 out of the middle mold 105. Then, the tablet discharge baffle 3 above the middle mold 105 blocks the tablet 4 in the tablet discharge box 5. The tablet discharge protection guide rail 135 is used to limit the lower punch 107 to prevent the lower punch 107 from being ejected too high, causing it to hit the tablet discharge baffle 3. The pull-down guide rail 132 drives the lower punch 107 to slowly pull down a certain distance, so that the forced feeder 133 is filled into the middle mold 105. The filling quantitative guide rail 131 drives the punch of the lower punch 107 to be ejected upward, and the over-filled material is scraped away by the powder scraper 124; the upper punch 102 and the lower punch 107 are driven by the upper pressing wheel 101 and the lower pressing wheel 110 to squeeze the material in the middle mold 105, and the material forms a tablet 4 with fonts on the upper and lower sides in the middle mold 105.

[0036] A material blocking rod 134 is installed on one side of the forced feeder 133, and a powder scraper 124 is installed on the other side of the forced feeder 133; the powder scraper 124 is used to scrape away the overfilled material.

[0037] A power mechanism 2 is installed at the bottom of the tablet press frame 1, and the upper punch plate 104, the middle punch plate 106 and the lower punch plate 109 are fixedly connected by positioning pins and screws.

[0038] The power mechanism 2 includes a main motor 21, a motor pulley 22, a synchronous belt 23, a reducer pulley 25, a reducer 26 and a main shaft 24; the motor pulley 22 is installed on the output shaft end of the main motor 21, the motor pulley 22 is transmission-connected to the reducer pulley 25 through the synchronous belt 23, the reducer pulley 25 is installed on the reducer 26, the output shaft hole of the reducer 26 is connected to the bottom end of the main shaft 24, and the upper end of the main shaft 24 is fixedly connected to the punch assembly 10.

[0039] The upper punch hole 111 , the middle die hole 112 , and the lower punch hole 113 correspond to each other one by one and are located on the same reference axis; the aperture of the middle die hole 112 is larger than the apertures of the upper punch hole 111 and the lower punch hole 113 .

[0040] One end of the upper punch rod 102 and the lower punch rod 107 is provided with a punch, and corresponding words are engraved on the punch.

[0041] The working principle of the present invention is as follows: the tablet press is started, the main motor 21 drives the motor pulley 22 to rotate, and then drives the reducer pulley 25 to rotate through the synchronous belt 23, the output shaft hole of the reducer 26 is connected to the main shaft 24, and the upper part of the main shaft 24 is connected to the punching plate assembly 10, and the punching plate rotates, and the material is added to the middle die 105 through the forced feeder 133, and the forced feeder 133 is fixed on the tablet press frame 1, and is located above the middle punching plate 106. When the punching plate assembly rotates, the upper punch rod 102 is pressed downward by the upper pressing wheel 101 so that the bottom end of the upper punch rod 102 enters the middle die hole 112, and the lower punch rod 107 is pressed upward by the lower pressing wheel 110 so that the head of the lower punch rod 107 applies pressure to the material in the middle die hole 112, and the material is in the middle die. Tablets 4 with fonts on the upper and lower sides are formed, and the fonts on the upper and lower sides are aligned. Since the upper punch rod 102 and the lower punch rod 107 are respectively provided with an upper punch rod key 103 and a lower punch rod key 108, the upper punch hole 111 and the lower punch hole 113 are both provided with a guide keyway 114, and the guide keyway 114 is processed once, and the vertical direction precision is very high. During the rotation of the punch plate assembly 104, the upper punch rod 102 and the lower punch rod 107 can only move up and down but not rotate under the action of the rising guide rail 121 and the punch plate keyway 114, thereby ensuring that the fonts on the upper and lower sides of the produced tablets are aligned. The punch plate assembly 10 rotates to another station, and the tablet 4 is pushed out from the middle die 105 by the lower punch rod 107, is blocked by the sheet discharging baffle 3 to the sheet discharging box 5 and flows into the sheet collecting barrel.

[0042] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A tablet press for pressing double-sided tablets with words, comprising a tablet press frame (1), characterized in that: A punching disc assembly (10) and a forced feeder (133) are installed on the tablet press frame (1), wherein the punching disc assembly (10) comprises an upper punching disc (104); a middle punching disc (106) is installed below the upper punching disc (104), and a lower punching disc (109) is installed below the middle punching disc (106); The upper punch plate (104) is evenly provided with a plurality of upper punch holes (111), an upper punch rod (102) is inserted into the interior of the upper punch hole (111), an upper pressing wheel (101) is installed above the upper punch rod (102), a plurality of middle die holes (112) are evenly provided on the middle punch plate (106), a middle die (105) is installed inside the middle die hole (112), a plurality of lower punch holes (113) are evenly provided on the lower punch plate (109), a lower punch rod (107) is inserted into the interior of the lower punch hole (113), and a lower pressing wheel (110) is installed below the lower punch rod (107); A guide keyway (114) is provided in the upper punch hole (111) and the lower punch hole (113); an upper punch key (103) is installed on the upper punch rod (102); the upper punch key (103) is inserted into the guide keyway (114) on the upper punch hole (111); a lower punch key (108) is installed on the lower punch rod (107); the lower punch rod (107) is inserted into the guide keyway (114) on the lower punch hole (113); The upper punch plate (104) is fixedly connected to the middle punch plate (106) and the lower punch plate (109) by means of positioning pins and screws; a material blocking rod (134) is installed on one side of the forced feeder (133); a powder scraper (124) is installed on the other side of the forced feeder (133); a tablet discharge baffle (3) is installed on the tablet press frame (1) located on the lower punch plate (109); tablets (4) are placed in the tablet discharge baffle (3); and a tablet discharge box (5) is connected to one end of the tablet discharge baffle (3); a power mechanism (2) is installed at the bottom of the tablet press frame (1); The power mechanism (2) comprises a main motor (21), a motor pulley (22), a synchronous belt (23), a speed reducer pulley (25), a speed reducer (26) and a main shaft (24); the motor pulley (22) is mounted on the output shaft end of the main motor (21); the motor pulley (22) is connected to the speed reducer pulley (25) through the synchronous belt (23); the speed reducer pulley (25) is mounted on the speed reducer (26); the output shaft hole of the speed reducer (26) is connected to the bottom end of the main shaft (24); the upper end of the main shaft (24) is fixedly connected to the punch assembly (10); The upper punching hole (111), the middle die hole (112), and the lower punching hole (113) correspond to each other one by one, and the upper punching hole (111), the middle die hole (112), and the lower punching hole (113) are located on the same reference axis, and the aperture of the middle die hole (112) is larger than the apertures of the upper punching hole (111) and the lower punching hole (113); One end of the upper punch rod (102) and the lower punch rod (107) is engraved with corresponding words.

Images