Pharmaceutical single-screw extruder

Abstract

The utility model relates to the technical field of single-screw extruders, and discloses a pharmaceutical single-screw extruder which comprises an extruder body, a connecting sleeve is fixedly sleeved at the discharge end of the extruder body, an extrusion die is arranged on the front side of the connecting sleeve, a motor is fixedly mounted on the outer surface of a mounting plate, and the motor is connected with the connecting sleeve. Two cutters are installed at the output end of the motor, damping rotating shafts are rotationally connected to the left end and the right end of the connecting sleeve, a C-shaped frame is fixedly connected between the two ends of the two damping rotating shafts, an adjusting screw rod penetrates through the outer surface of the C-shaped frame in a threaded mode, and a cleaning plate is rotationally connected to the other end of the adjusting screw rod. The cutter is driven by the motor to rotate so as to cut extruded medicament raw materials into particles, the distance between the cleaning plate and the cutter is adjusted through the adjusting screw rod, and the medicament raw materials remaining on the cutter are scraped through the cleaning plate, so that the subsequent medicament material particle cutting work is prevented from being affected, and the situation that the production cost is too high due to excessive material waste is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to single screw extruder technical field, concretely is a single screw extruder for pharmacy. BACKGROUND

[0002] Screw extruder is a kind of commonly used polymer product processing equipment, its structure is simple, easy to operate, and mixing and forming process is efficient and continuous, so its use range has not only limited to the processing of rubber and plastic products, but is widely used in new material research and development, food, pharmacy, fine chemical industry and other fields, in pharmaceutical industry, single screw extrusion device is a kind of equipment that plastic material is extruded and sent through spiral extrusion rod.In machine operation, spiral extrusion rod is rotated by the output end of driving motor, and plastic material is moved by the rotation of spiral extrusion rod, so that the thread page on the surface of spiral extrusion rod drives plastic material to move.

[0003] When the existing screw extruder is used, the screw extruder forms a thin rod-shaped solid, and then a rotary cutter is used to cut the spiral extruded material, to obtain the required material medicine, but when the rotary cutter is used to cut the material medicine, the medicine may adhere to the cutter, which may affect the subsequent granulation, and since the medicine is usually expensive, it causes waste and leads to high production cost, therefore a single screw extruder for pharmacy is proposed. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of the prior art, the utility model provides a single screw extruder for pharmacy to solve the problems mentioned in the background.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a single screw extruder for pharmacy, including extruder body, the outlet end of extruder body is fixedly provided with connecting sleeve, the front side of connecting sleeve is provided with extrusion die, the top outer surface of connecting sleeve is fixedly connected with mounting plate, the outer surface of mounting plate is fixedly provided with motor, the output end of motor is provided with two cutters, the left and right ends of connecting sleeve are rotatably connected with damping shaft, the both ends of two damping shafts are fixedly connected with C-shaped frame, the outer surface of C-shaped frame is threaded and penetrates adjusting screw, the other end of adjusting screw is rotatably connected with cleaning plate.

[0006] Furthermore, the connecting sleeve has a fixing groove inside, and a fixing cylinder is fixedly connected to the rear end of the extrusion mold. The fixing cylinder is movably inserted into the fixing groove. The outer surfaces of the left and right sides of the fixing cylinder are each provided with a first limiting groove. The outer surfaces of the left and right sides of the connecting sleeve are each movably inserted with a first movable rod. The outer surfaces of the two first movable rods are each fixedly connected with a first limiting block. A first spring is fixedly connected between the first limiting block and the inner wall of the connecting sleeve. The first spring is sleeved on the outer surface of the first movable rod.

[0007] Furthermore, pull plates are fixedly connected to the outer surfaces of the two first movable rods facing away from each other. Two second limiting grooves are opened on the outer surface of the pull plates. Side plates are fixedly connected to the outer surfaces of the left and right sides of the connecting sleeve. A second movable rod is movably inserted into the outer surface of the side plate. A second limiting block is fixedly connected to the side of the second movable rod facing the pull plate. A second spring is fixedly connected between the second limiting block and the side plate. The second spring is sleeved on the outer surface of the second movable rod.

[0008] Furthermore, a limiting disc is fixedly sleeved on the outer surface of the damping shaft on the left side. The outer surface of the limiting disc has several limiting holes arranged in a circumferential array. A horizontal plate is fixedly connected to the outer surface of the left side of the connecting sleeve. A pin is movably inserted into the outer surface of the horizontal plate, and the other end of the pin is inserted into the limiting hole.

[0009] Furthermore, a plurality of third springs arranged in a circumferential array are fixedly connected to the rear inner wall of the connecting sleeve, and a circular plate is fixedly connected to the other end of the plurality of third springs.

[0010] Furthermore, the distance between the cleaning plate and the cutter is 1mm-3mm.

[0011] Furthermore, the extruder body includes an extrusion cylinder, a feed hopper, a drive motor, and a spiral extrusion rod, the outer surface of which is provided with threaded blades.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This pharmaceutical single-screw extruder uses a motor to drive the cutter to rotate and granulate the extruded pharmaceutical raw materials. The distance between the cleaning plate and the cutter is adjusted by adjusting the screw. The cleaning plate scrapes off any residual pharmaceutical raw materials on the cutter to prevent them from affecting subsequent pharmaceutical material granulation and to avoid excessive material waste that would lead to high production costs.

[0014] 2. This pharmaceutical single-screw extruder, by setting a first movable rod and a first spring, allows the first limiting block to disengage from the first limiting groove, and in conjunction with the second movable rod and the second spring, allows the second limiting block to disengage from the second limiting groove, thereby releasing the limitation on the fixed cylinder and the extrusion die, allowing for quick replacement of different extrusion dies. Attached Figure Description

[0015] Figure 1 This is a front view structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the front sectional view of the present invention;

[0018] Figure 4 This is a cross-sectional schematic diagram of the connecting sleeve and related structures of this utility model;

[0019] Figure 5 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0020] Figure 6 This utility model Figure 3 Enlarged structural diagram at point B;

[0021] Figure 7 This utility model Figure 2 Enlarged structural diagram at point C.

[0022] In the diagram: 1. Extruder body; 2. Connecting sleeve; 3. Motor; 4. Cutter; 5. Damping shaft; 6. C-shaped frame; 7. Adjusting screw; 8. Cleaning plate; 9. Fixing groove; 10. Extrusion die; 11. First limiting groove; 12. First movable rod; 13. First limiting block; 14. First spring; 15. Pull plate; 16. Second movable rod; 17. Second limiting block; 18. Second limiting groove; 19. Second spring; 20. Limiting plate; 21. Limiting hole; 22. Pin; 23. Third spring; 24. Circular plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1:

[0025] Please refer to the following: Figures 1-7 This utility model provides a technical solution: a pharmaceutical single-screw extruder, including an extruder body 1, a connecting sleeve 2 fixedly sleeved at the discharge end of the extruder body 1, an extrusion die 10 provided on the front side of the connecting sleeve 2, an mounting plate fixedly connected to the top outer surface of the connecting sleeve 2, a motor 3 fixedly mounted on the outer surface of the mounting plate, two cutters 4 mounted on the output end of the motor 3, damping shafts 5 rotatably connected to both ends of the connecting sleeve 2, a C-shaped frame 6 fixedly connected between the two ends of the two damping shafts 5, an adjusting screw 7 threaded through the outer surface of the C-shaped frame 6, and a rotatably connected end of the adjusting screw 7. Specifically, the cleaning plate 8 is used in the operation of the extruder body 1. The pharmaceutical raw material is extruded through the extrusion die 10, and the cutter 4 is driven to rotate by the motor 3. After the pharmaceutical raw material is extruded, the cutter 4 extrudes the pharmaceutical raw material. When the pharmaceutical raw material remains on the cutter 4 and cannot fall off, the cleaning plate 8 scrapes off the residual pharmaceutical raw material on the cutter 4 when the cutter 4 comes into contact with it. This prevents excessive pharmaceutical raw material from remaining on the cutter 4, which could affect the subsequent granulation of pharmaceutical raw material and avoid excessive material waste that would lead to high production costs. The distance between the cleaning plate 8 and the cutter 4 can be adjusted by rotating the adjusting screw 7.

[0026] In this embodiment, a fixing groove 9 is provided inside the connecting sleeve 2, and a fixing cylinder is fixedly connected to the rear end of the extrusion mold 10. The fixing cylinder is movably inserted into the fixing groove 9. A first limiting groove 11 is provided on the outer surfaces of both the left and right sides of the fixing cylinder. A first movable rod 12 is movably inserted into the outer surfaces of both the left and right sides of the connecting sleeve 2. A first limiting block 13 is fixedly connected to the outer surfaces of the two first movable rods 12. A first spring 14 is fixedly connected between the first limiting block 13 and the inner wall of the connecting sleeve 2. The first spring 14 is sleeved on the outer surface of the first movable rod 12. Specifically, pulling the first movable rod 12 outward causes the first limiting block 13 to disengage from the inside of the first limiting groove 11, thereby releasing the limiting at the fixing cylinder of the extrusion mold 10.

[0027] In this embodiment, pull plates 15 are fixedly connected to the outer surfaces of the two opposing first movable rods 12. Two second limiting grooves 18 are opened on the outer surface of the pull plates 15. Side plates are fixedly connected to the outer surfaces of the left and right sides of the connecting sleeve 2. Second movable rods 16 are movably inserted into the outer surfaces of the side plates. A second limiting block 17 is fixedly connected to the side of the second movable rod 16 facing the pull plate 15. A second spring 19 is fixedly connected between the second limiting block 17 and the side plate. The second spring 19 is sleeved on the outer surface of the second movable rod 16. Specifically, pulling the second movable rod 16 outward causes the second limiting block 17 to disengage from the inside of the second limiting groove 18, releasing the pull plate 15 from its limitation. When the other second limiting groove 18 corresponds to the second limiting block 17, the force applied to the second movable rod 16 is stopped, and the second limiting block 17 is inserted into the second limiting groove 18 under the elastic force of the second spring 19, thus limiting the pull plate 15.

[0028] In this embodiment, a limiting plate 20 is fixedly sleeved on the outer surface of the left damping shaft 5. The outer surface of the limiting plate 20 has a plurality of limiting holes 21 arranged in a circumferential array. A horizontal plate is fixedly connected to the left outer surface of the connecting sleeve 2. A pin 22 is movably inserted into the outer surface of the horizontal plate. The other end of the pin 22 is inserted into the inside of the limiting hole 21. Specifically, the pin 22 is removed so that it disengages from the limiting hole 21, thereby releasing the limiting of the damping shaft 5 and allowing the C-shaped frame 6 to rotate. The pin 22 is then inserted into the inside of the limiting hole 21 to limit the limiting plate 20, thereby limiting the damping shaft 5.

[0029] In this embodiment, a plurality of third springs 23 arranged in a circumferential array are fixedly connected to the inner rear wall of the connecting sleeve 2. The other end of the plurality of third springs 23 is fixedly connected to a ring plate 24. Specifically, when the fixing cylinder is inserted into the fixing groove 9, the fixing cylinder contacts the ring plate 24, causing the third springs 23 to compress. When the fixing cylinder is released from its limit, the third springs 23 reset, causing the ring plate 24 to reset and the fixing cylinder to pop out.

[0030] In this embodiment, the distance between the cleaning plate 8 and the cutter 4 is 1mm-3mm. Specifically, by adopting the above technical solution, the cutter 4 is prevented from directly contacting the cleaning plate 8 while not affecting the cleaning plate 8 in cleaning the pharmaceutical material on the cutter 4.

[0031] In this embodiment, the extruder body 1 includes an extrusion cylinder, a feed hopper, a drive motor, and a spiral extrusion rod. The outer surface of the spiral extrusion rod is provided with threaded blades. Specifically, by conveying the pharmaceutical raw material from the feed hopper into the interior of the extruder body 1, the drive motor of the extruder body 1 drives the spiral extrusion rod to rotate, and the added pharmaceutical raw material is moved by the spiral extrusion rod through its rotation, causing the threaded blades on its surface to move the pharmaceutical raw material.

[0032] Working Principle: In use, this invention delivers the pharmaceutical raw material from the feed hopper into the extruder body 1. The drive motor of the extruder body 1 rotates the spiral extrusion rod, causing the spiral blades on its surface to move the added pharmaceutical raw material through the rotation of the spiral extrusion rod. The pharmaceutical raw material is then extruded through the extrusion die 10. The motor 3 drives the cutter 4 to rotate. After the pharmaceutical raw material is extruded, the cutter 4 extrudes the pharmaceutical raw material. When any pharmaceutical raw material remains on the cutter 4 and cannot fall off, the cutter 4 contacts the cleaning plate 8. The cleaning plate 8 scrapes off the residual pharmaceutical material on the cutter 4, causing it to fall off. This avoids excessive pharmaceutical raw material remaining on the cutter 4, which could affect subsequent pharmaceutical raw material pelleting and prevent excessive material waste that could lead to high production costs.

[0033] When the extrusion die 10 needs to be replaced, first rotate the two cutters 4 to the horizontal position, then remove the pin 22 so that it disengages from the limiting hole 21, thereby releasing the limiting of the damping shaft 5 and allowing the C-shaped frame 6 to rotate. Rotate the C-shaped frame 6 to a position perpendicular to the horizontal plane, then pull the second movable rod 16 outwards, causing the second limiting block 17 to disengage from the inside of the second limiting groove 18, releasing the limiting of the pull plate 15. Then pull the pull plate 15 outwards so that the other second limiting groove 18 aligns with the second limiting block 17. Stop applying force to the second movable rod 16, allowing the elastic force of the second spring 19 to... The second limiting block 17 is inserted into the second limiting groove 18 to limit the pull plate 15. When the pull plate 15 is pulled, the first movable rod 12 is driven to disengage the first limiting block 13 from the inside of the first limiting groove 11, thus releasing the limitation at the fixed cylinder of the extrusion mold 10. Then, the same method is used to disengage the first limiting block 13 on the other side from the inside of the first limiting groove 11. Then, under the elastic force of the third spring 23, the ring plate 24 is driven to reset, causing the extrusion mold 10 to pop out. Thus, the extrusion mold 10 can be removed by gently applying force. When installing a new extrusion mold 10, the above steps are reversed.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pharmaceutical single-screw extruder, comprising an extruder body (1), characterized in that: A connecting sleeve (2) is fixedly fitted at the discharge end of the extruder body (1). An extrusion die (10) is provided on the front side of the connecting sleeve (2). An installation plate is fixedly connected to the top outer surface of the connecting sleeve (2). A motor (3) is fixedly installed on the outer surface of the installation plate. Two cutters (4) are installed at the output end of the motor (3). Damping shafts (5) are rotatably connected to both ends of the connecting sleeve (2). A C-shaped frame (6) is fixedly connected between the two ends of the two damping shafts (5). An adjusting screw (7) is threaded through the outer surface of the C-shaped frame (6). A cleaning plate (8) is rotatably connected to the other end of the adjusting screw (7).

2. The pharmaceutical single-screw extruder according to claim 1, characterized in that: The connecting sleeve (2) has a fixed groove (9) inside. The rear end of the extrusion mold (10) is fixedly connected to a fixed cylinder. The fixed cylinder is movably inserted into the fixed groove (9). The left and right outer surfaces of the fixed cylinder are provided with first limiting grooves (11). The left and right outer surfaces of the connecting sleeve (2) are movably inserted with first movable rods (12). The outer surfaces of the two first movable rods (12) are fixedly connected with first limiting blocks (13). The first limiting blocks (13) are fixedly connected to the inner wall of the connecting sleeve (2). The first springs (14) are sleeved on the outer surfaces of the first movable rods (12).

3. A pharmaceutical single-screw extruder according to claim 2, characterized in that: Pull plates (15) are fixedly connected to the outer surfaces of the two first movable rods (12) facing away from each other. Two second limiting grooves (18) are opened on the outer surface of the pull plate (15). Side plates are fixedly connected to the outer surfaces of the left and right sides of the connecting sleeve (2). A second movable rod (16) is movably inserted into the outer surface of the side plate. A second limiting block (17) is fixedly connected to the side of the second movable rod (16) facing the pull plate (15). A second spring (19) is fixedly connected between the second limiting block (17) and the side plate. The second spring (19) is sleeved on the outer surface of the second movable rod (16).

4. A pharmaceutical single-screw extruder according to claim 1, characterized in that: A limiting plate (20) is fixedly sleeved on the outer surface of the damping shaft (5) on the left side. The outer surface of the limiting plate (20) is provided with a plurality of limiting holes (21) arranged in a circular array. A horizontal plate is fixedly connected to the outer surface of the left side of the connecting sleeve (2). A pin (22) is movably inserted into the outer surface of the horizontal plate. The other end of the pin (22) is inserted into the limiting hole (21).

5. A pharmaceutical single-screw extruder according to claim 1, characterized in that: The rear inner wall of the connecting sleeve (2) is fixedly connected to a plurality of third springs (23) arranged in a circumferential array, and the other end of the plurality of third springs (23) is fixedly connected to a ring plate (24).

6. A pharmaceutical single-screw extruder according to claim 1, characterized in that: The distance between the cleaning plate (8) and the cutter (4) is 1mm-3mm.

7. A pharmaceutical single-screw extruder according to claim 1, characterized in that: The extruder body (1) includes an extrusion cylinder, a feed hopper, a drive motor, and a spiral extrusion rod, with threaded blades on the outer surface of the spiral extrusion rod.

Images