Feeding mechanism of single-punch tablet press

Abstract

The utility model discloses a feeding mechanism of a single-punch tablet press, and belongs to the technical field of single-punch tablet presses, the feeding mechanism comprises a punching structure, the punching structure comprises a middle template, a punching hole is formed in the middle template, a sliding base is fixedly installed at the position, close to the punching hole, of the upper end face of the middle template, and a material injection mechanism is fixedly installed on the sliding base; the material injection mechanism comprises a feeding bent pipe, a hopper is arranged at the top of an upper bent pipe section of the feeding bent pipe in a communicating mode, a material injection vertical pipe is arranged at the position, close to the end, of a horizontal pipe section of the feeding bent pipe in a communicating mode, and an adjustable automatic return valve is fixedly arranged in the material injection vertical pipe; the feeding speed can be controlled by manually adjusting the adjustable automatic return valve, particularly, after a certain amount of feeding operation is completed and external force is removed, the adjustable automatic return valve can be rapidly and automatically closed, a flowing channel of powder raw materials is timely blocked, and the feeding speed is increased. And excessive powder raw materials are prevented from continuously falling into the stamping hole due to the fact that the passage is not cut off in time.

Description

Technical Field

[0001] The present application relates to the technical field of single-punch tablet presses, and in particular to a feeding mechanism of a single-punch tablet press. Background Art

[0002] The name of the single punch tablet press comes from the fact that it has only one set of punches. The punch of the lower punch of the single punch tablet press enters the middle die hole from the lower end of the middle die hole, seals the bottom of the middle die hole, and uses the feeder to fill the middle die hole with medicine. The punch of the upper punch enters the middle die hole from the upper end of the middle die hole and descends a certain distance to press the powder into tablets; then the upper punch rises out of the hole, and the lower punch rises to push the tablet out of the middle die hole, completing a tableting process.

[0003] In the patent document with the published announcement number CN202573045U, a feeding and tableting mechanism is provided, whose structural components include an upper punch, a lower punch, a middle die, a feeder and a triangular prism-shaped steel pipe, etc., wherein the middle die is provided with a die hole, the feeder is arranged above the middle die, and the triangular prism-shaped steel pipe as the main body is provided with a leakage port and a sealing plate. The utility model can reduce the contact area between the feeder and the upper end surface of the middle die, avoid the granular raw material being pressed against the upper end surface of the middle die, so that the horizontal position of the granular raw material scraped by the feeder above the die hole is consistent, avoiding too large a weight difference between the produced tablets.

[0004] However, after the feeding and tableting mechanism is completed, the sealing plate cannot be closed immediately, so some powder medicine will still fall into the die hole before the sealing plate is completely closed, making the actual falling amount greater than the required amount, causing the feeder to scrape away more powder raw materials during movement, resulting in waste of powder. Even if a recovery mechanism may be provided, the large amount of recovered powder will lead to more waste of energy and affect efficiency when it is reused. Therefore, in view of the above problems, a feeding mechanism of a single punch tablet press is proposed. Utility Model Content

[0005] In view of the shortcomings of the prior art, the present application provides a feeding mechanism for a single-punch tablet press, which overcomes the shortcomings of the prior art and aims to solve the problem that the feeding port cannot be closed immediately after feeding is completed, resulting in some drug powder still falling, making the actual amount added greater than the required amount.

[0006] To achieve the above objectives, this application provides the following technical solutions:

[0007] A feeding mechanism of a single-punching tablet machine comprises a punching structure, which comprises a middle template, wherein the middle template is provided with a punching hole, a sliding base is fixedly installed on the upper end surface of the middle template near the punching hole, an injection mechanism is fixedly installed on the sliding base, the injection mechanism comprises a feeding bending tube, a hopper is connected to the top of the upper bending tube section of the feeding bending tube, a vertical injection tube is connected to the position of the horizontal tube section of the feeding bending tube near the end, an adjustable automatic return valve is fixedly installed in the vertical injection tube, a scraping ridge is fixedly installed below the end of the horizontal tube section of the feeding bending tube, and the end of the horizontal tube section of the feeding bending tube is filled with tube end filling.

[0008] By adopting the above technical solution, powder raw materials are added to the hopper. Under the action of gravity, the powder raw materials enter the feeding bending tube and fall from the injection vertical tube into the punching hole to complete the feeding operation. The feeding speed can be controlled by adjusting the adjustable automatic return valve. In particular, when a certain amount of feeding operation is completed and the external force is removed, the adjustable automatic return valve can quickly close itself to block the flow path of the powder raw material in time, thereby avoiding excessive powder raw materials from continuing to fall into the punching hole due to the untimely cutting off of the path, resulting in the actual feeding amount being far greater than the preset demand.

[0009] As a preferred technical solution of the present application, the adjustable automatic return valve includes a valve plate, which is rotatably connected to the injection vertical tube via a rotating shaft fixedly connected at both ends, the rotating shaft extends out of the injection vertical tube and an end plate is fixedly provided at the end, and a reset torsion spring is arranged outside the rotating shaft, one end of the reset torsion spring is fixedly connected to the end plate and the other end is fixedly connected to the outer wall of the injection vertical tube.

[0010] By adopting the above technical solution, the flow rate per unit time in the injection vertical pipe can be controlled by the rotation amplitude of the valve plate. In particular, after the torque applied to the valve plate from the outside is removed, the valve plate can quickly rotate under the torque of the reset torsion spring, close the passage in the injection vertical pipe, and promptly stop the flow of powder and interrupt the feeding.

[0011] As a preferred technical solution of the present application, a paddle is fixedly connected to the end piece of the front end surface, and a soft anti-slip convex strip is fixedly provided on the paddle.

[0012] By adopting the above technical solution, the operator can conveniently control the rotation amplitude of the valve plate by turning the paddle, thereby controlling the feeding speed of the injection vertical pipe.

[0013] As a preferred technical solution of the present application, a limit plate is fixedly arranged on the side of the end piece on which the paddle is installed, and the angle between the limit plate and the paddle is one hundred and eighty degrees. A starting position block is fixedly arranged at the right position on the injection vertical tube, and a maximum position block is fixedly arranged at the upper and lower positions of the injection vertical tube.

[0014] By adopting the above technical scheme, the rotation angle of the valve plate can be limited, that is, when the limit plate rotates and contacts the maximum position blocking plate, the valve plate has rotated ninety degrees. At this time, the valve plate has the smallest degree of closure on the injection vertical pipe and the feeding speed is the fastest. When the operator's hand leaves the paddle, due to the loss of external force, the valve plate will quickly rotate under the action of the torque of the reset torsion spring until the limit plate rotates and contacts the starting position blocking plate. At this time, the valve plate completely closes the injection vertical pipe and cannot continue to rotate, which can effectively prevent excessive rotation so that the valve plate cannot completely close the injection vertical pipe.

[0015] As a preferred technical solution of the present application, the sliding base includes a mounting base plate fixedly connected to the middle template, a group of slide rails are arranged on the upper surface of the mounting base plate, a mounting seat is slidably arranged in the slide rails, and an injection mechanism is fixedly installed on the mounting seat.

[0016] By adopting the above technical solution, the injection mechanism can be driven to move forward and backward. When adding material, the injection mechanism is moved forward to add material into the punching hole. After the addition is completed, the injection mechanism is moved so as not to hinder the punching work.

[0017] As a preferred technical solution of the present application, a limiting slide groove is provided in the slide rail, limiting convex strips are fixedly provided at the bottom of both sides of the mounting seat, the limiting convex strips are slidably provided in the limiting slide groove, and a handle is fixedly provided on the mounting seat.

[0018] By adopting the above technical solution, the mounting seat can be prevented from falling off by the sliding of the limiting convex strip in the limiting sliding groove, and can only slide forward and backward along the sliding rail.

[0019] As a preferred technical solution of the present application, a smooth chamfer is provided on the edge at the bottom of the scraping edge strip and is in close contact with the upper end surface of the middle template.

[0020] By adopting the above technical solution, the scraping edge strip can scrape off the powder raw material overflowing from the punching hole as cleanly as possible during the movement.

[0021] As a preferred technical solution of the present application, the punching structure further includes a lower punch and an upper punch fixedly connected to the external driving structure, and the central axes of the lower punch, the upper punch and the punching hole coincide with each other.

[0022] By adopting the above technical solution, the punching work of punching the powder raw material in the punching hole to form tablets can be realized.

[0023] The beneficial effects of the present application are as follows: the feeding speed can be controlled by manually adjusting the adjustable automatic return valve. In particular, when a certain amount of feeding operation is completed and the external force is removed, the adjustable automatic return valve can quickly close itself, timely blocking the passage for the flow of powder raw materials, avoiding excessive powder raw materials from continuing to fall into the punching hole due to untimely cutting off of the passage, resulting in the actual feeding amount being far greater than the preset demand, which can reduce the burden of powder raw material recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure and installation location of this application;

[0025] Figure 2 This is a cross-sectional view of the injection mechanism structure of the present application;

[0026] Figure 3 This is a schematic diagram of the structure of the adjustable automatic return valve of the present application;

[0027] Figure 4 This is a schematic diagram of the external structure of the adjustable automatic return valve of the present application;

[0028] Figure 5 This is a schematic diagram of the stamping structure of this application;

[0029] Figure 6 This is a schematic diagram of the sliding base structure of this application.

[0030] In the figure: 1. stamping structure; 11. middle template; 12. stamping hole; 13. lower punch; 14. upper punch; 2. sliding base; 21. mounting base; 22. slide rail; 23. mounting seat; 24. limiting slide groove; 25. limiting convex strip; 26. handle; 3. injection mechanism; 31. feeding bending tube; 32. hopper; 33. injection vertical pipe; 34. adjustable automatic return valve; 341. valve plate; 342. rotating shaft; 343. end plate; 344. reset torsion spring; 345. paddle; 346. anti-slip convex strip; 347. limiting plate; 348. starting position block plate; 349. maximum position block plate; 35. scraping edge strip; 36. pipe end filling. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] Reference Figure 1-2A feeding mechanism of a single punching tablet machine includes a punching structure 1, the punching structure 1 includes a middle template 11, a punching hole 12 is opened on the middle template 11, a sliding base 2 is fixedly installed at a position near the punching hole 12 on the upper end surface of the middle template 11, and a filling mechanism 3 is fixedly installed on the sliding base 2. The filling mechanism 3 includes a feeding bending tube 31, a hopper 32 is connected to the top of the bending tube section of the feeding bending tube 31, a feeding vertical pipe 33 is connected to the position near the end of the horizontal pipe section of the feeding bending tube 31, and an adjustable automatic return valve 34 is fixedly arranged in the filling vertical pipe 33, and a scraping edge strip 35 is fixedly arranged below the end of the horizontal pipe section of the feeding bending tube 31. The end of the horizontal tube section of the folded tube 31 is filled with a tube end filling 36. By adopting the above technical solution, powder raw materials are added to the hopper 32. Under the action of gravity, the powder raw materials enter the feeding bending tube 31 and fall from the injection vertical tube 33 into the punching hole 12 to complete the feeding operation. The feeding speed can be controlled by adjusting the adjustable automatic return valve 34. In particular, when a certain amount of feeding operation is completed and the external force is removed, the adjustable automatic return valve 34 can quickly close itself to block the flow path of the powder raw material in time, thereby avoiding excessive powder raw materials from continuing to fall into the punching hole 12 due to the untimely cutting off of the path, resulting in the actual feeding amount being far greater than the preset demand.

[0033] Reference Figure 3 The adjustable automatic return valve 34 includes a valve plate 341, which is rotatably connected to the injection vertical pipe 33 through a rotating shaft 342 fixedly connected at both ends. The rotating shaft 342 extends out of the injection vertical pipe 33 and an end plate 343 is fixedly arranged at the end. A return torsion spring 344 is arranged on the outer sleeve of the rotating shaft 342. One end of the return torsion spring 344 is fixedly connected to the end plate 343 and the other end is fixedly connected to the outer wall of the injection vertical pipe 33. A paddle 345 is fixedly connected to the end plate 343 on the front end surface. The paddle 34 5 is fixedly provided with a soft anti-skid convex strip 346. By adopting the above technical solution, it is convenient for the operator to control the rotation amplitude of the valve plate 341 by turning the paddle 345, thereby controlling the flow rate per unit time in the injection vertical pipe 33. In particular, after the torque applied to the valve plate 341 is removed, the valve plate 341 can quickly rotate under the torque of the return torsion spring 344, close the passage in the injection vertical pipe 33, and promptly stop the flow of powder and interrupt the feeding.

[0034] Reference Figure 4A limit plate 347 is fixedly arranged on the side of the end plate 343 on which the paddle 345 is installed, and the angle between the limit plate 347 and the paddle 345 is 180 degrees. A starting position blocking plate 348 is fixedly arranged on the right side of the injection vertical pipe 33, and a maximum position blocking plate 349 is fixedly arranged on the upper and lower positions of the injection vertical pipe 33. By adopting the above technical solution, the rotation angle of the valve plate 341 can be limited, that is, when the limit plate 347 rotates to contact the maximum position blocking plate 349, the valve plate 34 1 is rotated 90 degrees. At this time, the valve plate 341 has the smallest degree of closure on the injection vertical pipe 33, and the feeding speed is the fastest. When the operator's hand leaves the paddle 345, due to the loss of external force, the valve plate 341 will quickly rotate under the torque of the return torsion spring 344 until the limit plate 347 rotates to contact the starting position blocking plate 348. At this time, the valve plate 341 completely closes the injection vertical pipe 33 and cannot continue to rotate, which can effectively prevent the valve plate 341 from being over-rotated and unable to completely close the injection vertical pipe 33.

[0035] Reference Figure 6 The sliding base 2 includes a mounting base plate 21 fixedly connected to the middle template 11, and a group of slide rails 22 are arranged on the upper end surface of the mounting base plate 21, and a mounting seat 23 is slidably arranged in the slide rails 22, and an injection mechanism 3 is fixedly installed on the mounting seat 23. The above structure can drive the injection mechanism 3 to move forward and backward, and when adding materials, the injection mechanism 3 moves forward to the punching hole 12 to add materials. After the feeding is completed, the injection mechanism 3 is moved so that it does not hinder the punching work. In particular, a limited slide groove 24 is provided in the slide rail 22, and limited convex strips 25 are fixedly arranged on the bottom of both sides of the mounting seat 23. The limited convex strips 25 are slidably arranged in the limited slide grooves 24, and a handle 26 is fixedly arranged on the mounting seat 23. The limited convex strips 25 slide in the limited slide grooves 24 to prevent the mounting seat 23 from falling off, and enable it to slide forward and backward only along the slide rail 22.

[0036] Reference Figure 1 The bottom edge of the scraping strip 35 is provided with a smooth chamfer and is in close contact with the upper end surface of the middle template 11. By adopting the above technical solution, the scraping strip 35 can scrape off the powder raw material overflowing from the punching hole 12 as cleanly as possible during movement.

[0037] Reference Figure 5 The punching structure 1 also includes a lower punch 13 and an upper punch 14 fixedly connected to the external driving structure. The central axes of the lower punch 13, the upper punch 14 and the punching hole 12 coincide with each other. By adopting the above technical solution, the powder raw material in the punching hole 12 can be punched to form a tablet.

[0038] Working principle: Powdered raw materials are added to the hopper 32. Under the action of gravity, the powdered raw materials enter the feeding bending tube 31, fall from the injection vertical tube 33 and enter the punching hole 12 to complete the feeding operation; the operator can control the rotation range of the valve plate 341 by turning the paddle 345. When the limit plate 347 rotates and contacts the maximum position blocking plate 349, the valve plate 341 rotates ninety degrees. At this time, the valve plate 341 has the smallest degree of closure on the injection vertical tube 33, and the feeding speed is the fastest. When the feeding is completed, the operator's hand leaves the paddle 345, and the external The valve plate 341 will rotate rapidly under the action of the torque of the reset torsion spring 344 until the limit plate 347 rotates and contacts the starting position blocking plate 348. At this time, the valve plate 341 completely closes the injection vertical pipe 33 and cannot continue to rotate, which can effectively prevent excessive rotation so that the valve plate 341 cannot completely close the injection vertical pipe 33. The self-rotation closure of the valve plate 341 can timely block the flow path of the powder raw material, and avoid excessive powder raw material from continuing to fall into the stamping hole 12 due to the untimely cutting off of the path, resulting in the actual feeding amount being far greater than the preset demand.

[0039] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. Although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A feeding mechanism for a single punch tablet press, characterized in that: The invention comprises a punching structure (1), wherein the punching structure (1) comprises a middle template (11), the middle template (11) is provided with a punching hole (12), a sliding base (2) is fixedly mounted at a position near the punching hole (12) on the upper end surface of the middle template (11), a material injection mechanism (3) is fixedly mounted on the sliding base (2), the material injection mechanism (3) comprises a feeding bending tube (31), a hopper (32) is connected to the top of the upper bending tube section of the feeding bending tube (31), a material injection vertical tube (33) is connected to the position near the end of the horizontal tube section of the feeding bending tube (31), an adjustable automatic return valve (34) is fixedly mounted in the material injection vertical tube (33), a flattening rib (35) is fixedly mounted below the end of the horizontal tube section of the feeding bending tube (31), and a tube end filler (36) is filled at the end of the horizontal tube section of the feeding bending tube (31).

2. A feeding mechanism for a single punch tablet press according to claim 1, characterized in that: The adjustable automatic return valve (34) comprises a valve plate (341), the valve plate (341) being rotatably connected to the injection vertical pipe (33) via a rotating shaft (342) with two ends fixedly connected, the rotating shaft (342) extending out of the injection vertical pipe (33) and having an end plate (343) fixedly arranged at one end, a return torsion spring (344) being arranged on the outer sleeve of the rotating shaft (342), one end of the return torsion spring (344) being fixedly connected to the end plate (343) and the other end being fixedly connected to the outer wall of the injection vertical pipe (33).

3. A feeding mechanism for a single punch tablet press according to claim 2, characterized in that: A paddle (345) is fixedly connected to the end piece (343) of the front end surface, and a soft anti-slip convex strip (346) is fixedly provided on the paddle (345).

4. A feeding mechanism for a single punch tablet press according to claim 3, characterized in that: A limit plate (347) is fixedly arranged on the side of the end plate (343) on which the paddle (345) is installed, and the angle between the limit plate (347) and the paddle (345) is 180 degrees. A starting position blocking plate (348) is fixedly arranged at the right position on the injection vertical tube (33), and a maximum position blocking plate (349) is fixedly arranged at the upper and lower positions of the injection vertical tube (33).

5. The feeding mechanism of a single punch tablet press according to claim 1, characterized in that: The sliding base (2) comprises a mounting base plate (21) fixedly connected to the middle mold plate (11), a group of slide rails (22) being arranged on the upper end surface of the mounting base plate (21), a mounting seat (23) being slidably arranged in the slide rails (22), and a material injection mechanism (3) being fixedly mounted on the mounting seat (23).

6. A feeding mechanism for a single punch tablet press according to claim 5, characterized in that: A limit slide groove (24) is provided in the slide rail (22), and limit convex strips (25) are fixedly provided at the bottom of both sides of the mounting seat (23). The limit convex strips (25) are slidably arranged in the limit slide groove (24), and a handle (26) is fixedly provided on the mounting seat (23).

7. A feeding mechanism for a single punch tablet press according to claim 1, characterized in that: The bottom edge of the flattening edge strip (35) is provided with a smooth chamfer and is in close contact with the upper end surface of the middle template (11).

8. The feeding mechanism of a single punch tablet press according to claim 1, characterized in that: The punching structure (1) further comprises a lower punch (13) and an upper punch (14) fixedly connected to the external driving structure, wherein the central axes of the lower punch (13), the upper punch (14) and the punching hole (12) coincide with each other.

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