Tablet press uniform in feeding

Abstract

The utility model relates to a tablet press uniform in feeding. The tablet press comprises a rack, and an extrusion assembly and a tablet pressing assembly are arranged on the rack; the tabletting assembly comprises a driving compression roller and a driven compression roller, the rack is provided with a fixing plate located above the driving compression roller and the driven compression roller, and a material passing opening is formed in the fixing plate; a swing assembly is arranged on the fixing plate and comprises a swing air cylinder, a connecting plate and a material spreading pipe, the swing air cylinder is fixedly installed on the fixing plate, one end of the connecting plate is fixedly connected with an output shaft of the swing air cylinder, the connecting plate is detachably connected with the material spreading pipe through the connecting assembly, and the material spreading pipe is conical. In the process that the thermoplastic melt passes through the material passing opening of the fixing plate, the oscillating cylinder is started, the material spreading pipe is driven by the connecting plate to oscillate back and forth, and the falling thermoplastic melt is oscillated, so that the thermoplastic melt uniformly falls between the driving compression roller and the driven compression roller, the thermoplastic melt is prevented from being accumulated between the driving compression roller and the driven compression roller, and the service life of the thermoplastic melt is prolonged. And the final sheet-shaped product is prevented from being too thick.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of a tablet press, in particular to a tablet press with uniform feeding. BACKGROUND

[0002] The tablet press is an industrial device for tabletting materials extruded by an extruder, and is commonly used in the fields of pharmacy, chemical industry, food and material processing.

[0003] The related technology can refer to a double-screw extrusion tablet press disclosed in Chinese Patent No. CN111113842A, which comprises a rack, a receiving hopper arranged on the rack, an extrusion mechanism and a tabletting mechanism. The extrusion mechanism comprises a stirring cabin connected to the bottom of the receiving hopper and two intermeshing conical screws arranged in the stirring cabin. The rear end of one of the conical screws extends out of the stirring cabin and is connected to a first motor through a first speed reducer. The two conical screws are connected through a gear set. The front end of the stirring cabin is provided with a discharge port, and the front ends of the two conical screws extend into the discharge port. Duckbill-shaped rubber baffle plates are arranged on the left and right sides of the discharge port. A water jacket through which high-temperature water or steam can pass is arranged on the inner wall of the stirring cabin.

[0004] According to the related technology described above, the material extruded by the extrusion mechanism falls on the tabletting mechanism. Since the material falls by gravity, the material is prone to accumulate on the tabletting mechanism, affecting the tabletting effect. Invention content

[0005] In order to avoid the accumulation of materials, the application provides a tablet press with uniform feeding.

[0006] The application provides a tablet press with uniform feeding, which adopts the following technical scheme:

[0007] A tablet press with uniform feeding comprises a rack, wherein an extrusion assembly and a tabletting assembly are arranged on the rack.

[0008] The extrusion assembly comprises a receiving hopper and a stirring cabin. The stirring cabin is provided with a discharge port at one end. The receiving hopper is installed above the stirring cabin away from the discharge port and is in communication with the stirring cabin. Two conveying screws are rotatably connected in the stirring cabin.

[0009] The tabletting assembly comprises a driving roller and a driven roller. The driving roller and the driven roller are rotatably connected to the rack.

[0010] The rack is provided with a fixed plate above the driving roller and the driven roller. The fixed plate is provided with a material passing port.

[0011] The fixed plate is provided with a swing assembly for spreading the material extruded by the extrusion assembly, the swing assembly comprises a swing cylinder, a connecting plate and a material spreading pipe, the swing cylinder is fixedly installed on the fixed plate, one end of the connecting plate is fixedly connected with the output shaft of the swing cylinder, the connecting plate is detachably connected with the material spreading pipe through a connecting assembly, and the material spreading pipe is conical.

[0012] By adopting the above technical scheme, the plastic particles are poured into the receiving hopper, the plastic particles enter the stirring bin, the two conveying screws in the stirring bin rotate, the plastic particles are extruded by the outer part of the cylinder and the screw groove, shear force and friction force are generated, the plastic raw materials are rapidly rubbed and heated, the plastic raw materials are gradually melted into hot plastic melt, the hot plastic melt is extruded from the discharge port, the hot plastic melt falls between the driving pressure roller and the driven pressure roller through the material passing port of the fixed plate, the driving pressure roller and the driven pressure roller press the hot plastic melt into a sheet, in the process that the hot plastic melt passes through the material passing port of the fixed plate, the swing cylinder is started, the material spreading pipe is swung back and forth through the connecting plate, the hot plastic melt is swung to make the hot plastic melt fall uniformly between the driving pressure roller and the driven pressure roller, and accumulation of the hot plastic melt between the driving pressure roller and the driven pressure roller is avoided, and the sheet-shaped product is prevented from being too thick.

[0013] Optionally, the connecting assembly comprises a connecting ring, the connecting ring is sleeved on the outside of the material spreading pipe and is fixedly connected with the material spreading pipe, the connecting ring is provided with a connecting block, the connecting plate is provided with a connecting groove matched with the connecting block, a limiting groove is formed in the side wall of the connecting block, a connecting cavity in communication with the connecting groove is formed in the connecting plate, a limiting block matched with the limiting groove is movably connected in the connecting cavity, and an inclined surface is formed in the end of the limiting block.

[0014] By adopting the above technical scheme, when the connecting block is inserted into the limiting groove, the inclined surface of the limiting block abuts against the end of the connecting block, the limiting block moves into the connecting cavity, the spring is compressed, when the limiting groove corresponds to the connecting cavity, the compressed spring releases elastic force, the limiting block is pushed to move in the direction of the limiting groove, the connecting block is inserted into the limiting groove, and the connecting block is connected with the connecting plate, so that the material spreading pipe is fixed, the limiting block is moved out of the limiting groove, the connecting block is separated from the connecting plate, and the surface of the material spreading pipe is conveniently cleaned.

[0015] Optionally, a connecting gear rotatably connected in the connecting cavity is arranged in the connecting plate, and a first gear rack matched with the connecting gear is arranged on one side of the limiting block.

[0016] By adopting the above technical scheme, the connecting gear is rotated, and the position of the limiting block is adjusted through the first gear rack.

[0017] Optionally, a moving block is arranged on the connecting plate, and a second gear rack is arranged on one side of the moving block and engaged with the connecting gear.

[0018] By adopting the above technical scheme, the moving block is moved, the second gear rack drives the connecting gear to move, and the position of the limiting block is adjusted.

[0019] Optionally, the material spreading pipe is communicated with a water outlet pipe, a water inlet pipe is fixedly arranged in the material spreading pipe, and a pipe opening at one end of the water inlet pipe is located outside the material spreading pipe.

[0020] By adopting the above technical scheme, cold water is poured into the water inlet pipe, the cold water enters the material spreading pipe through the water inlet pipe, and the water in the material spreading pipe flows out of the water outlet pipe, so that the material spreading pipe is cooled.

[0021] Optionally, the material receiving hopper is communicated with a discharging box, a material mixing assembly is arranged in the discharging box, the material mixing assembly comprises a material mixing motor and a material mixing stirring frame, the material mixing motor is installed outside the discharging box, and the material mixing stirring frame is located in the discharging box and connected with an output shaft of the material mixing motor.

[0022] By adopting the above technical scheme, the plastic particles are poured into the discharging box and then enter the material receiving hopper, which facilitates the operator to add more plastic particles at the same time, the material mixing motor is started, the material mixing stirring frame rotates in the discharging box, and the plastic particles are prevented from being blocked in the discharging box, so that the plastic particles can enter the material receiving hopper.

[0023] Optionally, a conveying frame is arranged on one side of the rack, one end of the conveying frame is located below the driving pressure roller and the driven pressure roller, and a conveying belt is arranged on the conveying frame.

[0024] By adopting the above technical scheme, the material after tabletting is conveyed through the conveying frame.

[0025] Optionally, a plurality of heat dissipation fans are arranged above the conveying belt on the conveying frame.

[0026] By adopting the above technical scheme, the material conveyed on the conveying belt is cooled by the heat dissipation fans.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] During the process that the thermoplastic melt passes through the material outlet of the fixed plate, the swing cylinder is started, the material spreading pipe is swung back and forth through the connecting plate, the falling thermoplastic melt is swung, the thermoplastic melt is uniformly dropped between the driving pressure roller and the driven pressure roller, the thermoplastic melt is prevented from being accumulated between the driving pressure roller and the driven pressure roller, and the final sheet-shaped product is prevented from being too thick.

[0029] In the process of inserting the connecting block into the limiting groove, the inclined surface of the limiting block abuts against the end of the connecting block, the limiting block moves into the connecting cavity, the spring is compressed, when the limiting groove corresponds to the connecting cavity, the compressed spring releases elastic force, pushes the limiting block to move in the direction of the limiting groove, the limiting block is inserted into the limiting groove, the connecting block is connected with the connecting plate, so as to fix the spreading pipe, the limiting block is removed from the limiting groove, the connecting block is separated from the connecting plate, so as to facilitate cleaning the surface of the spreading pipe. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the tablet press with uniform feeding.

[0031] Figure 2 It is a schematic diagram for showing the connection relationship between the material mixing stirring frame and the discharging box in the embodiment of the application.

[0032] Figure 3 It is Figure 1 An enlarged schematic diagram of part A in the embodiment.

[0033] Figure 4 It is a schematic diagram of the structure of the connecting assembly in the embodiment of the application.

[0034] Figure 5 It is a schematic diagram of the internal structure of the spreading pipe in the embodiment of the application.

[0035] Explanation of reference signs: 1, rack; 2, extrusion assembly; 21, receiving hopper; 22, stirring bin; 221, discharge port; 3, discharging box; 31, material mixing motor; 32, material mixing stirring frame; 4, tablet pressing assembly; 41, driving pressure roller; 42, driven pressure roller; 43, fixed plate; 431, material passing port; 5, swinging assembly; 51, swinging cylinder; 52, connecting plate; 521, connecting groove; 53, spreading pipe; 531, water outlet pipe; 532, water inlet pipe; 6, connecting assembly; 61, connecting ring; 62, connecting block; 621, limiting groove; 63, limiting block; 631, first rack; 64, connecting gear; 65, moving block; 651, second rack; 66, spring; 7, conveying frame; 71, conveying belt; 72, cooling fan. DETAILED DESCRIPTION

[0036] The application will be further described in detail below in combination with all the drawings.

[0037] The embodiment of the application discloses a tablet press with uniform feeding.

[0038] Reference Figure 1 , Figure 2 and Figure 3The utility model provides a kind of feeding uniform tablet press, including rack 1, extrusion assembly 2 is provided on rack 1, extrusion assembly 2 includes receiving hopper 21 and stirring bin 22, stirring bin 22 is provided with discharge port 221 in one end, receiving hopper 21 is installed on the top of stirring bin 22 far from discharge port 221 one end and is communicated with stirring bin 22, two conveying screws are rotatably connected in stirring bin 22, plastic particles are poured into receiving hopper 21, plastic particles enter stirring bin 22, two conveying screws in stirring bin 22 rotate, plastic particles are extruded by stirring bin 22 and conveying screw, shear force and friction force are generated, cause high-speed friction and heating of plastic raw material, gradually melt plastic raw material into thermoplastic melt, and thermoplastic melt is extruded from discharge port 221.

[0039] With reference to Figure 2 Receiving hopper 21 is communicated with discharging box 3, discharging box 3 is provided with stirring assembly, and the stirring assembly comprises stirring motor 31 and stirring stirring frame 32; the stirring motor 31 is installed outside the discharging box 3, and the stirring stirring frame 32 is located in the discharging box 3 and connected with the output shaft of the stirring motor 31.

[0040] With reference to Figure 3 The tablet press further comprises pressing assembly 4, which is installed below the discharge port 221 of the stirring bin 22 on the rack 1; the pressing assembly 4 comprises driving roller 41 and driven roller 42, which are rotatably connected with the rack 1; a motor is installed on the rack 1 to drive the driving roller 41 and the driven roller 42 to rotate; a fixed plate 43 is installed on the rack 1 above the driving roller 41 and the driven roller 42; the fixed plate 43 is provided with a material passing opening 431; the thermoplastic melt passes through the material passing opening 431 of the fixed plate 43 and falls between the driving roller 41 and the driven roller 42; and the driving roller 41 and the driven roller 42 press the thermoplastic melt into a sheet shape.

[0041] With reference to Figure 3The fixed plate 43 is provided with a swinging assembly 5 for spreading the material extruded by the extrusion assembly 2, the swinging assembly 5 comprising a swinging cylinder 51, a connecting plate 52 and a spreading pipe 53, the swinging cylinder 51 being fixedly installed on the fixed plate 43, one end of the connecting plate 52 being fixedly connected with the output shaft of the swinging cylinder 51, the connecting plate 52 being detachably connected with the spreading pipe 53 through a connecting assembly 6, and the spreading pipe 53 being conical. During the process that the thermoplastic melt passes through the material passing opening 431 of the fixed plate 43, the swinging cylinder 51 is started to swing the spreading pipe 53 back and forth through the connecting plate 52, so as to swing the falling thermoplastic melt and make the thermoplastic melt evenly fall between the driving pressure roller 41 and the driven pressure roller 42, thereby avoiding the thermoplastic melt from being accumulated between the driving pressure roller 41 and the driven pressure roller 42 and avoiding the final sheet-shaped product from being too thick.

[0042] With reference to Figure 3 and Figure 4 The connecting assembly 6 comprises a connecting ring 61, the connecting ring 61 being sleeved on the spreading pipe 53 and being fixedly connected with the spreading pipe 53, a connecting block 62 being fixedly connected to the connecting ring 61, a connecting groove 521 being formed in the connecting plate 52 and being matched with the connecting block 62, a limiting groove 621 being formed in the side wall of the connecting block 62, a connecting cavity being formed in the connecting plate 52 and being communicated with the connecting groove 521, a limiting block 63 being movably connected in the connecting cavity and being matched with the limiting groove 621, an inclined surface being formed at the end of the limiting block 63, a spring 66 being arranged in the connecting cavity and being connected with the limiting block 63 and the inner wall of the connecting cavity at both ends, and the spring 66 being in a natural state, the limiting block 63 being located in the limiting groove 621. During the process that the connecting block 62 is inserted into the limiting groove 621, the inclined surface of the limiting block 63 abuts against the end of the connecting block 62, the limiting block 63 moves into the connecting cavity, and the spring 66 is compressed. When the limiting groove 621 corresponds to the connecting cavity, the compressed spring 66 releases the elastic force, pushes the limiting block 63 to move in the direction of the limiting groove 621, the limiting block 63 is inserted into the limiting groove 621, the connecting block 62 is connected with the connecting plate 52, and thus the spreading pipe 53 is fixed. The limiting block 63 is moved out of the limiting groove 621, the connecting block 62 is separated from the connecting plate 52, and thus the surface of the spreading pipe 53 is conveniently cleaned.

[0043] With reference to Figure 5 A connecting gear 64 is rotatably connected in the connecting cavity in the connecting plate 52, and a first rack 631 matched with the connecting gear 64 is arranged at one side of the limiting block 63. The position of the limiting block 63 is adjusted by rotating the connecting gear 64 through the first rack 631. A moving block is arranged on the connecting plate 52, and a second rack 651 matched with the connecting gear 64 is arranged at one side of the moving block. The position of the limiting block 63 is adjusted by moving the moving block through the second rack 651 to drive the connecting gear 64 to move.

[0044] With reference to Figure 5The water outlet pipe 531 is communicated with the material spreading pipe 53, and the water inlet pipe 532 is fixedly communicated with the material spreading pipe 53, and one end of the water inlet pipe 532 is located outside the material spreading pipe 53. The cold water is poured into the water inlet pipe 532, and the cold water enters the material spreading pipe 53 through the water inlet pipe 532, and the water in the material spreading pipe 53 flows out from the water outlet pipe 531 to cool the material spreading pipe 53.

[0045] With reference to Figure 1 One side of the rack 1 is provided with a conveying frame 7, one end of the conveying frame 7 is located below the driving pressure roller 41 and the driven pressure roller 42, and the conveying belt 71 is arranged on the conveying frame 7. The material after tabletting is conveyed through the conveying frame 7. A plurality of heat dissipation fans 72 are arranged above the conveying belt 71 on the conveying frame 7. The material conveyed on the conveying belt 71 is cooled by the heat dissipation fans 72.

[0046] The implementation principle of the tablet press with uniform feeding of the embodiment of the application is as follows: the plastic particles are poured into the receiving hopper 21, the plastic particles enter the stirring bin 22, the two conveying screws in the stirring bin 22 rotate, the plastic particles are extruded by the outer part of the cylinder and the screw groove, shear force and friction force are generated, the plastic raw material is rapidly rubbed and heated, and the plastic raw material is gradually melted into a hot plastic melt, the hot plastic melt is extruded from the discharge port 221, the hot plastic melt falls between the driving pressure roller 41 and the driven pressure roller 42 through the material passing port 431 of the fixed plate 43, the driving pressure roller 41 and the driven pressure roller 42 press the hot plastic melt into a sheet shape, in the process that the hot plastic melt passes through the material passing port 431 of the fixed plate 43, the swing air cylinder 51 is started, the material spreading pipe 53 is swung back and forth through the connecting plate 52, the falling hot plastic melt is swung, the hot plastic melt is uniformly dropped between the driving pressure roller 41 and the driven pressure roller 42, accumulation of the hot plastic melt between the driving pressure roller 41 and the driven pressure roller 42 is avoided, and the last sheet-shaped product is prevented from being too thick.

[0047] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so: any equivalent changes made on the basis of the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A tablet press with uniform feed, characterized by: The machine frame (1) is provided with an extrusion assembly (2) and a tabletting assembly (4); The extrusion assembly (2) comprises a receiving hopper (21) and a stirring bin (22), the stirring bin (22) is provided with a discharging port (221) at one end, the receiving hopper (21) is installed above the stirring bin (22) away from the discharging port (221) and communicates with the stirring bin (22), and two conveying screws are rotatably connected in the stirring bin (22); The tabletting assembly (4) comprises a driving pressure roller (41) and a driven pressure roller (42), and the driving pressure roller (41) and the driven pressure roller (42) are rotatably connected with the machine frame (1); The machine frame (1) is provided with a fixed plate (43) above the driving pressure roller (41) and the driven pressure roller (42), and the fixed plate (43) is provided with a material passing port (431); The fixed plate (43) is provided with a swinging assembly (5) for spreading the material extruded by the extrusion assembly (2), the swinging assembly (5) comprises a swinging cylinder (51), a connecting plate (52) and a spreading pipe (53), the swinging cylinder (51) is fixedly installed on the fixed plate (43), one end of the connecting plate (52) is fixedly connected with the output shaft of the swinging cylinder (51), the connecting plate (52) is detachably connected with the spreading pipe (53) through a connecting assembly (6), and the spreading pipe (53) is conical.

2. The uniform feeding tablet press as claimed in claim 1, wherein: The connecting assembly (6) comprises a connecting ring (61), the connecting ring (61) is sleeved on the outside of the spreading pipe (53) and fixedly connected with the spreading pipe (53), the connecting ring (61) is provided with a connecting block (62), the connecting plate (52) is provided with a connecting groove (521) matched with the connecting block (62), a limiting groove (621) is formed in the side wall of the connecting block (62), a connecting cavity communicating with the connecting groove (521) is formed in the connecting plate (52), a limiting block (63) matched with the limiting groove (621) is movably connected in the connecting cavity, an inclined surface is formed in the end of the limiting block (63), a spring (66) is arranged in the connecting cavity, and the two ends of the spring (66) are connected with the limiting block (63) and the inner wall of the connecting cavity.

3. A tablet press for uniform feeding according to claim 2, characterized in that: The connecting plate (52) is rotatably connected with a connecting gear (64) in the connecting cavity, and the limiting block (63) is provided with a first rack (631) engaged with the connecting gear (64) on one side.

4. The uniform feeding tablet press as claimed in claim 3, wherein: The connecting plate (52) is provided with a moving block (65), and the moving block (65) is provided with a second rack (651) engaged with the connecting gear (64) on one side.

5. The uniform feeding tablet press as claimed in claim 1, wherein: The spreading pipe (53) is communicated with a water outlet pipe (531), the spreading pipe (53) is fixedly provided with a water inlet pipe (532) therein, and the pipe opening of one end of the water inlet pipe (532) is located outside the spreading pipe (53).

6. The uniform feeding tablet press as claimed in claim 1, wherein: The material receiving hopper (21) is communicated with a discharging box (3), a stirring assembly is arranged in the discharging box (3), the stirring assembly comprises a stirring motor (31) and a stirring stirring frame (32), the stirring motor (31) is installed outside the discharging box (3), and the stirring stirring frame (32) is located in the discharging box (3) and is connected with an output shaft of the stirring motor (31).

7. The uniform feeding tablet press as claimed in claim 1, wherein: One side of the rack (1) is provided with a conveying frame (7), one end of the conveying frame (7) is located below the driving pressure roller (41) and the driven pressure roller (42), and the conveying frame (7) is provided with a conveying belt (71).

8. A uniform feeding tablet press as claimed in claim 7, wherein: A plurality of heat dissipation fans (72) are arranged above the conveying belt (71) of the conveying frame (7).

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