Potassium peroxodisulfate effervescent tablet compression mechanism

Abstract

The utility model relates to the field of tablet press, concretely relates to a potassium hydrogen per sulfate effervescent tablet compression mechanism, including the tablet press and setting on the rotary table of tablet press, the rotary table is provided with a plurality of punches along the circumference equidistance, the mechanism still includes the locating disc fixed in the top wall of tablet press, and the bottom of locating disc is provided with the closed cam groove, the utility model discloses through rotary table, punch and spud etc. Setting, can under the condition of not stopping, automatically shovel the powder or particle that the punch bottom adheres, avoid the punch bottom contact surface when carrying out tableting, exist granular matter, lead to the tablet surface after tableting become rough, not smooth, have the pit or appear the phenomenon of defect angle, influence tableting quality, further improve the production efficiency and continuity of equipment, avoid the loss caused by stopping cleaning.

Description

Technical Field

[0001] This utility model relates to the field of tablet presses, and in particular to a compression mechanism for potassium persulfate effervescent tablets. Background Technology

[0002] In the pharmaceutical and chemical industries, potassium persulfate effervescent tablets are typically produced using rotary tablet presses. The core of this equipment lies in the tableting die assembly (usually composed of an upper punch, lower punch, and middle die), which sequentially completes filling, pre-compression, main compression, and tablet ejection processes on a rotating turntable. Because potassium persulfate itself has corrosive and adhesive properties, during tableting, powder or fine particles easily adhere to the end face and sidewalls of the punches (especially the lower punch). This adhesion not only affects the appearance and weight accuracy of the tablets, but residue accumulation can also lead to punch jamming, tablet cracking, accelerated die wear, and even contamination of subsequent products, which is particularly detrimental to the production of potassium persulfate effervescent tablets, which require high cleanliness and stability.

[0003] In the prior art, such as the rotary tablet press mold structure disclosed in Chinese Patent Publication No. CN214214866U, a structure including a tablet press box and internal multi-layer mold disks (first mold disk, second mold disk, and third mold disk) is provided, with the mold disks driven to rotate synchronously via a transmission shaft. Its characteristic is that the upper die head (upper punch) and lower die head (lower punch) are slidably connected to the first mold disk and the third mold disk, respectively, and the upper and lower die heads are driven to move independently in opposite directions by arc-shaped first and second bosses fixed to the bottom of the tablet press box and extrusion rollers fixed to the upper support.

[0004] This patented rotary tablet press, along with similar models, cannot effectively and promptly clean the punches (especially the bottom face and lower sidewall of the lower punch) after tableting during continuous operation. Adhering potassium persulfate powder or granules are carried out of the die hole as the punch rises. To remove these deposits, production must be interrupted, and the machine must be stopped for manual or auxiliary cleaning. This significantly reduces production efficiency and continuity, while increasing labor costs and downtime losses. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a potassium persulfate effervescent tablet compression mechanism to solve the technical problems in the prior art.

[0006] To achieve the above objectives, this utility model provides a potassium persulfate effervescent tablet compression mechanism, including a tablet press and a rotary table mounted on the tablet press. A plurality of punches are equidistantly arranged along the circumference of the rotary table. The mechanism further includes: A positioning plate is fixed to the top wall of the tablet press, and a closed cam groove is provided at the bottom of the positioning plate; A first slide groove is formed on the rotating platform and corresponds to the adjacent punch. A slider is slidably installed on the first slide groove. The top of the slider is provided with an extension end, which is rolled inside the cam groove. A scraper is fixed at the bottom of the slider, and the scraping end of the scraper extends to the side of the bottom of the adjacent punch.

[0007] Preferably, the cam groove is composed of an annular reference groove and a raised groove protruding from the reference groove. The raised groove includes an arc-shaped transition section that is smoothly connected to the annular reference groove, and a straight extension section that extends outward from the end of the arc-shaped transition section. The end of the straight extension section terminates at the extension line of the inner edge of the annular reference groove for a smooth transition connection.

[0008] Preferably, a gap is provided between the top of the shovel end and the bottom of the punch.

[0009] Preferably, the shovel has a triangular plate-shaped structure, and its side near the punch is an inclined surface that slopes downwards towards the punch axis.

[0010] Preferably, the mechanism further includes: A positioning sleeve is fitted onto the lower end of the punch. The top of the positioning sleeve is fixed to the bottom of the rotating table. A cleaning sleeve is rotatably installed on the inner wall of the positioning sleeve. Cleaning bristles are distributed in an equidistant array along the circumference on the inner wall of the cleaning sleeve, and the cleaning bristles are in contact with the outer surface of the lower end of the punch.

[0011] Preferably, the inner ring of the positioning sleeve is provided with a bearing, and the inner ring of the bearing is fixedly connected to the outer wall of the cleaning sleeve, and the outer ring of the bearing is fixedly connected to the inner wall of the positioning sleeve.

[0012] Preferably, the mechanism further includes: Multiple second slides are provided on the rotary table, each second slide being located between an adjacent first slide and the punch; A positioning rod is fixed on the second slide groove, and a push block is slidably sleeved on the surface of the positioning rod; A spring is sleeved on the positioning rod, one end of which is fixed to the inner wall of the second slide groove, and the other end of which is fixed to the surface of the push block; A hinge rod is hinged to the bottom of the push block, and the end of the hinge rod away from the push block is hinged to the outer wall of the cleaning sleeve through a connecting block.

[0013] Preferably, the end of the hinge rod away from the push block has an oblong through hole, and a positioning pin is fixed on the connecting block, the positioning pin being slidably inserted into the oblong through hole.

[0014] The beneficial effects of this utility model are as follows: The potassium persulfate effervescent tablet compression mechanism of this utility model, with components such as a rotating table, punch, and scraper, can automatically scrape off the powder or particles adhering to the bottom of the punch without stopping the machine. This avoids the presence of particles on the bottom contact surface of the punch during tableting, which would cause the tablet surface to become rough, uneven, pitted, or missing corners, affecting the tableting quality. This further improves the production efficiency and continuity of the equipment and avoids losses caused by downtime for cleaning. By configuring the components of the punch, slider, and cleaning sleeve, the slider drives the scraper to move and clean the bottom of the punch, which in turn drives the cleaning sleeve to rotate, increasing the cleaning range of the cleaning bristles. This allows the cleaning bristles on the inner wall of the cleaning sleeve to better clean the side wall at the bottom of the punch, thereby improving the cleaning effect of the powder on the side wall of the punch. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a perspective view of the present utility model; Figure 2 This is a rear view of the present invention; Figure 3 This is a bottom sectional view of the present invention; Figure 4 This is an exploded view of a portion of the positioning disc, shovel, and cleaning sleeve of this utility model. Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point A in the middle; Figure 6 This is a bottom view of the positioning plate and cam groove of this utility model; Figure 7 This is a bottom sectional view of a portion of the rotary table, punch, and hinge rod of this utility model. Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point B.

[0017] The diagram is marked as follows: 1. Tableting machine; 2. Rotary table; 201. First slide groove; 202. Second slide groove; 3. Punch; 4. Positioning plate; 5. Cam groove; 6. Slider; 7. Shovel; 8. Positioning sleeve; 9. Cleaning sleeve; 10. Positioning rod; 11. Push block; 12. Spring; 13. Hinge rod; 14. Connecting block. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0019] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] The first aspect of this utility model proposes a compression mechanism for potassium persulfate effervescent tablets, such as... Figure 1-8 As shown, the device includes a tablet press 1 and a rotary table 2 mounted on the tablet press 1. A plurality of punches 3 are equidistantly arranged along the circumference of the rotary table 2. The mechanism also includes: The positioning plate 4 is fixed to the top wall of the tablet press 1, and the bottom of the positioning plate 4 is provided with a closed cam groove 5; A first slide groove 201 is provided on the rotary table 2 and corresponds to the adjacent punch 3. A slider 6 is slidably installed on the first slide groove 201. The top of the slider 6 is provided with an extension end, and the extension end is rolled inside the cam groove 5. A scraper 7 is fixed at the bottom of the slider 6, and the scraping end of the scraper 7 extends to the bottom side of the adjacent punch 3.

[0021] When the rotary table 2 of the rotary tablet press rotates, the punches 3, evenly distributed around the circumference of the rotary table 2, flatten the potassium persulfate effervescent tablets. After the rotary table 2 drives the punches 3 to complete the tablet compression and upward movement, the punches 3 rotate towards the protruding position of the cam groove 5. When the slider 6 moves with the rotary table 2 to the protruding part of the cam groove 5, it can drive the slider 6 to push outward; and the scraper 7 at the bottom of the slider 6 removes the particles at the bottom of the punches 3. When the slider 6 continues to rotate with the rotary table 2 and moves out of the protruding part, the slider 6... Guided by the cam groove 5, block 6 retracts inward to reset, causing the scraper 7 at the bottom of slider 6 to move out from under the punch 3, facilitating subsequent tableting operations of the punch 3. In this way, powder or particles adhering to the bottom of the punch 3 can be automatically scraped off without stopping the machine, preventing particles from remaining on the bottom contact surface of the punch 3 during tableting, which would cause the tablet surface to become rough, uneven, pitted, or have missing corners, affecting the tableting quality, further improving the production efficiency and continuity of the equipment, and avoiding losses caused by downtime for cleaning.

[0022] In this embodiment: the cam groove 5 is composed of an annular reference groove and a raised groove protruding from the reference groove. The raised groove includes an arc-shaped transition section that is smoothly connected to the annular reference groove, and a straight extension section that extends outward from the end of the arc-shaped transition section. The end of the straight extension section terminates at the extension line of the inner edge of the annular reference groove for a smooth transition connection.

[0023] When the slider 6 moves to the raised groove position with the rotating table 2, the raised groove drives the slider 6 to push outward; and the scraper 7 at the bottom of the slider 6 removes the particles at the bottom of the punch 3. When the slider 6 continues to rotate with the rotating table 2 and moves out of the raised groove, the slider 6 retracts inward and resets under the guidance of the annular reference groove.

[0024] In this embodiment, a gap is provided between the top of the scraping end of the scraper 7 and the bottom of the punch 3. When the scraper 7 moves towards the punch 3, it can remove the powder or particles adhering to the bottom of the punch 3. The small gap between them can prevent the scraper 7 from being in contact with the bottom of the punch 3 for a long time, thus avoiding wear on the bottom of the punch 3 and affecting the tableting quality of potassium persulfate effervescent tablets.

[0025] In this embodiment, the scraper 7 has a triangular plate-like structure, and its side near the punch 3 is an inclined surface that slopes downwards towards the axis of the punch 3. The triangular structure of the scraper 7 creates an acute angle at the end near the punch 3, making it easier to remove powder or particles adhering to the bottom of the punch 3.

[0026] In this embodiment, the mechanism further includes: A positioning sleeve 8 is fitted onto the lower end of the punch 3. The top of the positioning sleeve 8 is fixed to the bottom of the rotating table 2. A cleaning sleeve 9 is rotatably installed on the inner wall of the positioning sleeve 8. Cleaning bristles are distributed in an equidistant array along the circumference on the inner wall of the cleaning sleeve 9, and the cleaning bristles are in contact with the outer surface of the lower end of the punch 3.

[0027] Because the outer wall of the lower end of the punch 3 is in contact with the cleaning bristles of the inner wall of the cleaning sleeve 9, the cleaning bristles will scrape off the powder adhering to the lower end of the punch 3 during the shrinking process of the punch 3, reducing the amount of powder adhering to the surface of the lower end of the punch 3, and avoiding excessive powder adhering to the side wall of the lower end of the punch 3. This would prevent the material adhering to the potassium persulfate effervescent tablets from being pulled out of the tablets after compression, resulting in problems such as tablet defects or complete tablet deformity.

[0028] In this embodiment, the inner ring of the positioning sleeve 8 is provided with a bearing, and the inner ring of the bearing is fixedly connected to the outer wall of the cleaning sleeve 9, while the outer ring of the bearing is fixedly connected to the inner wall of the positioning sleeve 8. The bearing arrangement further improves the rotational stability of the cleaning sleeve 9.

[0029] In this embodiment, the mechanism further includes: Multiple second slides 202 are provided on the rotary table 2, and each second slide 202 is located between an adjacent first slide 201 and the punch 3; A positioning rod 10 is fixed on the second slide groove 202, and a push block 11 is slidably sleeved on the surface of the positioning rod 10; A spring 12 is sleeved on the positioning rod 10. One end of the spring 12 is fixed to the inner wall of the second slide groove 202, and the other end of the spring 12 is fixed to the surface of the push block 11. A hinge rod 13 is hinged to the bottom of the push block 11. The end of the hinge rod 13 away from the push block 11 is hinged to the outer wall of the cleaning sleeve 9 through the connecting block 14.

[0030] When the rotating table 2 rotates and drives the corresponding slider 6 to move towards the protrusion of the cam groove 5, and pushes the scraper 7 at the bottom of the slider 6 towards the punch 3, the side wall of the slider 6 is pressed against one end of the push block 11, thereby pushing the push block 11 to move towards the corresponding position of the punch 3. At this time, the hinge rod 13 at the bottom of the push block 11 deflects and pushes the hinged connecting block 14 to deflect, so that the connecting block 14 drives the cleaning sleeve 9, which is rotatably mounted on the positioning sleeve 8, to rotate a certain angle. Through the rotation of the cleaning sleeve 9, the cleaning range of the cleaning bristles is increased, so that the cleaning bristles on the inner wall of the cleaning sleeve 9 can better clean the side wall at the lower end of the punch 3, thereby improving the cleaning effect of the powder on the side wall of the punch 3. After the slider 6 is reset, the push block 11 clamps the slider 6 and pushes the push block 11 to reset under the action of the spring 12, so that the push block 11 pulls the hinge rod 13 to deflect and reset, thereby causing the hinge rod 13 to drive the cleaning sleeve 9 fixed on the connecting block 14 to rotate and reset.

[0031] In this embodiment: the end of the hinge rod 13 away from the push block 11 is provided with an oblong through hole, and a positioning pin is fixed on the connecting block 14. The positioning pin is slidably inserted into the oblong through hole.

[0032] When the hinge rod 13 pushes the connecting block 14 on the side wall of the cleaning sleeve 9 to deflect, the hinge rod 13 and the hinged connecting block 14 have a certain displacement space due to the waist-shaped groove at one end of the hinge rod 13, so that there is no interference when the hinge rod 13 pushes the hinged connecting block 14.

[0033] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0034] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A potassium persulfate effervescent tablet compression mechanism, comprising a tablet press (1) and a rotary table (2) disposed on the tablet press (1), wherein a plurality of punches (3) are equidistantly arranged along the circumference of the rotary table (2), characterized in that, The organization also includes: A positioning plate (4) is fixed to the top wall of the tablet press (1), and a closed cam groove (5) is provided at the bottom of the positioning plate (4). A first slide groove (201) is opened on the rotary table (2) and corresponds to the adjacent punch (3). A slider (6) is slidably installed on the first slide groove (201). The top of the slider (6) is provided with an extension end, and the extension end is rolled inside the cam groove (5). A scraper (7) is fixed at the bottom of the slider (6), and the scraping end of the scraper (7) extends to the bottom side of the adjacent punch (3).

2. The potassium persulfate effervescent tablet compression mechanism according to claim 1, characterized in that, The cam groove (5) consists of an annular reference groove and a protruding groove protruding from the reference groove. The protruding groove includes an arc-shaped transition section that is smoothly connected to the annular reference groove, and a straight extension section that extends outward from the end of the arc-shaped transition section. The end of the straight extension section terminates at the extension line of the inner edge of the annular reference groove for a smooth transition connection.

3. The potassium persulfate effervescent tablet compression mechanism according to claim 1, characterized in that, A gap is provided between the top of the shovel end of the shovel (7) and the bottom of the punch (3).

4. The potassium persulfate effervescent tablet compression mechanism according to claim 1, characterized in that, The shovel (7) is a triangular plate structure, and its side near the punch (3) is an inclined surface that slopes from top to bottom toward the axis of the punch (3).

5. A potassium persulfate effervescent tablet compression mechanism according to any one of claims 1-4, characterized in that, The organization also includes: A positioning sleeve (8) is fitted onto the lower end of the punch (3). The top of the positioning sleeve (8) is fixed to the bottom of the rotating table (2). A cleaning sleeve (9) is rotatably installed on the inner wall of the positioning sleeve (8). Cleaning bristles are distributed in an equidistant array along the circumference on the inner wall of the cleaning sleeve (9), and the cleaning bristles are in contact with the outer surface of the lower end of the punch (3).

6. The potassium persulfate effervescent tablet compression mechanism according to claim 5, characterized in that, The inner ring of the positioning sleeve (8) is provided with a bearing, and the inner ring of the bearing is fixedly connected to the outer wall of the cleaning sleeve (9), and the outer ring of the bearing is fixedly connected to the inner wall of the positioning sleeve (8).

7. The potassium persulfate effervescent tablet compression mechanism according to claim 5, characterized in that, The organization also includes: Multiple second slides (202) are provided on the rotary table (2), and each second slide (202) is located between the adjacent first slide (201) and the punch (3); A positioning rod (10) is fixed on the second slide groove (202), and a push block (11) is slidably sleeved on the surface of the positioning rod (10). A spring (12) is sleeved on the positioning rod (10), one end of the spring (12) is fixed to the inner wall of the second slide groove (202), and the other end of the spring (12) is fixed to the surface of the push block (11); A hinge rod (13) is hinged to the bottom of the push block (11), and one end of the hinge rod (13) away from the push block (11) is hinged to the outer wall of the cleaning sleeve (9) via a connecting block (14).

8. The potassium persulfate effervescent tablet compression mechanism according to claim 7, characterized in that, The hinge rod (13) has a waist-shaped through hole at the end away from the push block (11), and a positioning pin is fixed on the connecting block (14). The positioning pin is slidably inserted into the waist-shaped through hole.

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