A powder spraying and suction device and a tablet compressor for manufacturing effervescent tablets.

Abstract

This utility model relates to the technical field of tablet presses, and in particular to a powder spraying and suction device and a tablet press for manufacturing effervescent tablets. The powder spraying and suction device of this utility model includes a first working surface and a second working surface arranged opposite to each other. The first working surface has an upper powder spraying port and an upper dust suction port, and the second working surface has a lower powder spraying port and a lower dust suction port. The powder spraying and suction device is also provided with a powder spraying connection port and a dust suction connection port. The powder spraying connection port communicates with the upper powder spraying port and the lower powder spraying port, and the dust suction connection port communicates with the upper dust suction port and the lower dust suction port. The centralized arrangement of the powder spraying connection port and the dust suction connection port simplifies the external pipeline connection, improves the equipment integration, thereby improving the uniformity and utilization rate of the coating material spraying, and improving production efficiency and product quality.

Description

Technical Field

[0001] This utility model relates to the technical field of tablet presses, and in particular to a powder spraying and suction device and a tablet press for manufacturing effervescent tablets. Background Technology

[0002] As a core dosage form in the pharmaceutical, food, and chemical industries, the consistency of tablet quality directly affects the safety and efficacy of products. In industrial production, tablet compressors are the core equipment for high-speed compression molding of powdered materials. Through a die system, high pressure is applied to the powder filling the die holes to form tablets with a predetermined shape and density. Effervescent tablets, as a special type of tablet, place higher demands on equipment in their manufacturing process, particularly in the coating process, where numerous technical challenges exist.

[0003] Traditional effervescent tablet compressors face the following prominent problems during the coating process: the coating spray is easily dispersed under high pressure, resulting in significant raw material waste and pollution of the internal environment; spray particles can adsorb randomly onto the surfaces of critical components such as the punch and tray, affecting the equipment's operational accuracy; existing dust collection devices struggle to achieve targeted recovery, leading to excessive dust concentrations in the working environment; and the unreasonable layout of the powder spraying and dust collection systems results in a bulky equipment structure and difficult maintenance. These problems severely restrict the production efficiency and product qualification rate of effervescent tablets, increasing production costs for enterprises.

[0004] To address the aforementioned issues, existing technologies urgently need improvement. Utility Model Content

[0005] The purpose of this invention is to provide a powder spraying and suction device and a tablet press for manufacturing effervescent tablets, so as to avoid material waste.

[0006] To solve the above-mentioned technical problems, this utility model provides a powder spraying and suction device and a tablet press for manufacturing effervescent tablets.

[0007] The powder spraying and suction device of this utility model includes a first working surface and a second working surface arranged opposite to each other. The first working surface has an upper powder spraying port and an upper dust suction port, and the second working surface has a lower powder spraying port and a lower dust suction port. The powder spraying and suction device is also provided with a powder spraying connection port and a dust suction connection port. The powder spraying connection port is connected to the upper powder spraying port and the lower powder spraying port, and the dust suction connection port is connected to the upper dust suction port and the lower dust suction port.

[0008] Furthermore, both the upper powder spray nozzle and the lower powder spray nozzle are elongated holes, and at least two upper dust suction ports are provided, each located on one side of the width direction of the upper powder spray nozzle. At least two lower dust suction ports are provided, each located on one side of the width direction of the lower powder spray nozzle.

[0009] Furthermore, the upper dust suction port is also an elongated hole and there are two of them, symmetrically distributed on both sides of the width direction of the upper powder spraying port and parallel to the upper powder spraying port; the lower dust suction port is also an elongated hole and there are two of them, symmetrically distributed on both sides of the width direction of the lower powder spraying port and parallel to the lower powder spraying port.

[0010] Furthermore, the length of the upper dust suction port is greater than the length of the upper powder spraying port, and the length of the lower dust suction port is greater than the length of the lower powder spraying port.

[0011] Furthermore, the powder spraying and dust suction device includes a first plate and a second plate that are fixedly connected. The powder spraying port and the dust suction port are disposed on the side of the first plate. The first working surface is located on the first plate, and the second working surface is located on the second plate.

[0012] Furthermore, the powder spraying connection port is connected to the upper powder spraying port and the lower powder spraying port through the powder spraying connection channel, and the dust suction connection port is connected to the upper dust suction port and the lower dust suction port through the dust suction connection channel. The powder spraying connection channel and the dust suction connection channel are staggered in the vertical direction.

[0013] Furthermore, the dust suction connection channel is located on the first plate, the powder spraying connection channel includes a first channel segment located on the first plate and a second channel segment located on the second plate, and the powder spraying connection interface is located at the entrance of the first channel segment.

[0014] This utility model also provides a tablet press for manufacturing effervescent tablets, including a material tray, a feeding module, an upper punch, a lower punch, and a powder spraying and suction device as described in any of the above technical solutions; the material tray has a material hole, the feeding module is used to add material into the material hole, the upper powder spraying port of the powder spraying and suction device is used to spray coating material onto the lower end face of the upper punch, the lower powder spraying port is used to spray coating material onto the lower end face of the upper punch and the material hole, and the upper and lower dust suction ports of the powder spraying and suction device are used to absorb excess coating material; the upper punch and the lower punch are used to extrude and form effervescent tablets in the material hole.

[0015] Furthermore, the lower end face of the upper punch rod is provided with an upper concave cavity opening towards the upper powder spraying port, and the upper end face of the lower punch rod is provided with a lower concave cavity facing towards the lower powder spraying port.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] This application achieves simultaneous spraying and recycling of coating material during the effervescent tablet pressing process by setting up a powder spraying and suction device with a bidirectional working surface. The upper and lower powder spraying nozzles operate simultaneously, ensuring uniform coverage of the material; the upper and lower dust suction ports promptly absorb excess coating material, avoiding material waste and environmental pollution. The centralized arrangement of the powder spraying and dust suction ports simplifies external pipeline connections, improves equipment integration, and thus enhances the uniformity and utilization rate of the coating material, thereby increasing production efficiency and product quality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an embodiment of the powder spraying and suction device for a tablet press used to manufacture effervescent tablets according to the present invention.

[0019] Figure 2 for Figure 1 A schematic diagram of the powder spraying and suction device from another perspective;

[0020] Figure 3 for Figure 1 A schematic diagram of the structure of the first plate of the powder spraying and suction device in the middle;

[0021] Figure 4 for Figure 1 A schematic diagram of the structure of the second plate of the powder spraying and suction device in the middle;

[0022] Figure 5 A schematic diagram showing the state of the tablet press for manufacturing effervescent tablets according to this utility model when preparing for powder spraying;

[0023] Figure 6 This is a schematic diagram showing the state of the tablet press used to manufacture effervescent tablets when the powder spraying is completed.

[0024] Figure 7 This is a schematic diagram showing the state of the tablet press used to manufacture effervescent tablets when the feeding is completed;

[0025] Figure 8 This is a schematic diagram of the tableting process of the tablet press used to manufacture effervescent tablets according to this utility model;

[0026] Figure 9 This is a schematic diagram showing the state of the tablet press used to manufacture effervescent tablets according to this utility model when the tablets are being dispensed.

[0027] Figure label:

[0028] 1. Material tray; 2. Powder spraying and suction device;

[0029] 10. Upper punch rod; 11. Upper concave cavity;

[0030] 20. Lower punch; 21. Lower cavity;

[0031] 30. First plate; 31. Upper powder spray nozzle; 32. Upper dust suction nozzle; 33. Powder spray connection port; 34. Dust suction connection port; 36. Third channel section; 37. Fourth channel section; 38. End cap;

[0032] 40. Second plate; 41. Lower powder spray nozzle; 42. Lower dust suction nozzle; 44. First channel section; 45. Second channel section. Detailed Implementation

[0033] The present invention will now be described with reference to the accompanying drawings, which illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art can modify the present invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the present invention. Based on the teachings of this specification, those skilled in the art can form new technical solutions through the cross-combination of different implementation methods without creating technical contradictions; such modifications should all be considered to fall within the protection scope of this patent.

[0034] The serial numbers assigned to components in this document, such as "first," "second," etc., are merely for distinguishing the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] In this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, the term "electrical connection" can be a direct electrical connection or an indirect electrical connection through an intermediate medium.

[0037] The present invention will be described more specifically by way of example in the following paragraphs with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0038] The following is in conjunction with the instruction manual appendix. Figure 1 To be continued Figure 9 This paper introduces the powder spraying and suction device of this utility model and the tablet press used to manufacture effervescent tablets.

[0039] This application discloses a tablet press for manufacturing effervescent tablets, including a material tray 1, a feeding module, an upper punch 10, a lower punch 20, and a powder spraying and suction device 2; the material tray 1 has a material hole, the feeding module is used to add material into the material hole, and the powder spraying and suction device is used to spray out the coating material and absorb excess coating material; the upper punch 10 and the lower punch 20 are used to compress and form effervescent tablets in the material hole.

[0040] like Figure 1 ,picture, Figure 3 and Figure 4 As shown, the powder spraying and suction device 2 includes a first working surface and a second working surface arranged in opposite directions. The first working surface has an upper powder spraying port 31 and an upper dust suction port 32, and the second working surface has a lower powder spraying port 41 and a lower dust suction port 42. The powder spraying and suction device 2 is also provided with a powder spraying connection port 33 and a dust suction connection port 34. The powder spraying connection port 33 is connected to the upper powder spraying port 31 and the lower powder spraying port 41, and the dust suction connection port 34 is connected to the upper dust suction port 32 and the lower dust suction port 42. The upper powder spraying port 31 is used to spray coating material onto the lower end face of the upper punch 10, and the lower powder spraying port 41 is used to spray coating material onto the lower end face of the upper punch 10 and the material hole.

[0041] This application achieves simultaneous spraying and recycling of coating material during the effervescent tablet pressing process by setting up a powder spraying and suction device 2 with a bidirectional working surface. The upper powder spraying port 31 and the lower powder spraying port 41 operate simultaneously, ensuring uniform coverage of the material; the upper dust suction port 32 and the lower dust suction port 42 promptly absorb excess coating material, avoiding material waste and environmental pollution. The centralized arrangement of the powder spraying connection port 33 and the dust suction connection port 34 simplifies external pipeline connections, improves equipment integration, thereby improving the uniformity and utilization rate of the coating material spraying, and enhancing production efficiency and product quality.

[0042] The coating material can be magnesium stearate. The magnesium stearate spray formed through the upper powder spray nozzle 31 and the lower powder spray nozzle 41 can cover the lower end face of the upper punch 10, the lower end face of the lower punch 20, and the inner wall of the material hole to form a coating. The material is effervescent tablet granules.

[0043] Furthermore, in some of these embodiments, such as Figure 1 As shown, both the upper powder spray nozzle 31 and the lower powder spray nozzle 41 are elongated holes. There are at least two upper dust suction ports 32, which are located on both sides of the width direction of the upper powder spray nozzle 31. There are at least two lower dust suction ports 42, which are located on both sides of the width direction of the lower powder spray nozzle 41.

[0044] The specific implementation methods of elongated orifices include, but are not limited to: using a straight slit structure, the length of which is adapted to the length of the material orifice; controlling the width of the elongated orifice within a reasonable range to ensure linear powder distribution; and chamfering the edges of the elongated orifice to reduce material accumulation. An elongated powder spraying area is formed through the elongated powder spraying orifice, allowing the coating material to be evenly distributed along the length of the material orifice.

[0045] Furthermore, in some embodiments, the upper dust suction port 32 is also an elongated hole and there are two of them, symmetrically distributed on both sides of the upper powder spraying port 31 in the width direction and parallel to the upper powder spraying port 31; the lower dust suction port 42 is also an elongated hole and there are two of them, symmetrically distributed on both sides of the lower powder spraying port 41 in the width direction and parallel to the lower powder spraying port 41.

[0046] Specifically, the elongated suction port increases the suction area, and the two symmetrically distributed suction ports can more evenly absorb excess coating material on both sides of the powder spraying nozzle. As a preferred embodiment, the length of the elongated suction port can be the same as or slightly longer than the powder spraying nozzle to ensure coverage of the powder spraying area.

[0047] The width of the suction port can be adjusted according to the actual suction effect. The parallel suction ports work in conjunction with the powder spraying port to form a stable airflow field. The symmetrical arrangement of the upper and lower suction ports 42 ensures that the tablet press maintains a consistent coating and cleaning effect during bidirectional operation. Preferably, the lengths of the upper suction port 32 and the lower suction port 42 are designed to be greater than the lengths of the corresponding upper powder spraying port 31 and lower powder spraying port 41, respectively, which can expand the coverage area of ​​the suction ports. This structural design allows the suction ports to more fully cover the powder spraying area during the powder spraying process, effectively improving the recovery efficiency of excess coating material. Due to the increased length of the suction ports, it can be ensured that the coating material on both sides of the powder spraying port and the extended area can be absorbed in time, thereby reducing material waste and environmental pollution.

[0048] The symmetrically arranged elongated dust extraction port design effectively solves the technical problems of uneven powder spraying and incomplete absorption of excess coating material during effervescent tablet manufacturing. Specifically, the elongated shape increases the suction area and improves absorption efficiency; the symmetrical arrangement ensures uniformity during bidirectional operation; and the parallel arrangement creates a stable airflow field, ensuring uniform powder spraying. This significantly improves coating uniformity and material utilization, while reducing dust pollution and equipment cleaning frequency.

[0049] Furthermore, in some of these embodiments, such as Figure 2 , Figure 3 and Figure 4 As shown, the powder spraying and suction device 2 includes a first plate 30 and a second plate 40 fixedly connected. The powder spraying connection port 33 and the dust suction connection port 34 are disposed on the side of the first plate 30. The first working surface is located on the first plate 30 and the second working surface is located on the second plate 40.

[0050] Specifically, the first plate 30 and the second plate 40 can be fixedly connected by bolts, snap-fit ​​connections, or welding. The powder spraying port 33 and the dust suction port 34 can be configured as circular, square, or other shaped interfaces, and equipped with quick connectors for easy connection of external pipelines. The first working surface and the second working surface can be respectively provided with a powder spraying port and a dust suction port, wherein the powder spraying port can adopt an elongated hole design, and the dust suction ports can be symmetrically distributed on both sides of the powder spraying port. As a preferred embodiment, the first plate 30 and the second plate 40 can be made of engineering plastics, aluminum alloys, or stainless steel to balance strength and lightweight requirements.

[0051] The split-plate design optimizes the structure and reduces the processing difficulty of structures such as the upper dust suction port 32, lower dust suction port 42, upper powder spraying port 31, and lower powder spraying port 41. The centralized arrangement of the powder spraying connection port 33 and the dust suction connection port 34 simplifies the pipeline connection operation; the separate design of the dual working surfaces optimizes space utilization while ensuring functionality.

[0052] Furthermore, in some embodiments, the powder spraying connection port 33 is connected to the upper powder spraying port 31 and the lower powder spraying port 41 through a powder spraying connection channel, and the dust suction connection port 34 is connected to the upper dust suction port 32 and the lower dust suction port 42 through a dust suction connection channel. The powder spraying connection channel and the dust suction connection channel are arranged in a staggered manner in the vertical direction.

[0053] Specifically, the powder spraying connection channel can use independent branch pipes to connect the upper powder spraying port 31 and the lower powder spraying port 41 respectively, or use a Y-shaped tee structure to achieve flow diversion. The dust collection connection channel can be designed as an inverted Y-shaped structure to collect the airflow from the upper and lower dust collection ports 42. Specific implementation methods for staggered arrangement include, but are not limited to: the powder spraying connection channel being located in the upper region of the first plate 30, and the dust collection connection channel being located in the lower region of the first plate 30; or the powder spraying connection channel adopting a parallel dual-channel design with left and right sides, and the dust collection connection channel adopting a staggered serpentine channel layout. The preferred cross-sectional shape of the channel is circular or elliptical.

[0054] The staggered spatial design effectively solves the airflow interference problem when the two channels run in parallel. The powder spraying connection channel is responsible for evenly conveying the coating material to the upper and lower powder spraying nozzles 41, while the dust collection connection channel efficiently recovers the scattered powder. The vertical staggered arrangement ensures that the two channels do not interfere with each other, guaranteeing both the stability of powder conveying and improving dust recovery efficiency. The compact spatial layout optimizes the overall size of the device, making it more suitable for the integration needs of miniaturized tablet presses.

[0055] Furthermore, in some of these embodiments, such as Figure 3 and Figure 4 As shown, the dust suction connection channel is located on the first plate 30, and the powder spraying connection channel includes a first channel segment 44 located on the first plate 30 and a second channel segment 45 located on the second plate 40. The powder spraying connection interface is located at the entrance of the first channel segment 44.

[0056] Specifically, the dust collection connection channel is centrally located inside the first plate 30, and can adopt a T-shaped flow channel structure. Its cross-sectional shape is preferably circular or elliptical. The inner wall of the channel can be coated with a wear-resistant coating to reduce dust adhesion. Specifically, for example... Figure 1 and Figure 4 As shown, a process hole can be machined on the first plate 30 to serve as a third channel section 36 connecting the dust suction ports on both sides of the two powder spraying ports. Another fourth channel section 37 parallel to the dust suction port is set to communicate with the process hole and the opening end of the process hole is sealed, for example by sealing it with a cap 38.

[0057] The first channel section 44 and the second channel section 45 of the powder spraying connection channel achieve fluid communication through a sealing interface at the mating surface of the plates. The sealing interface can be a flange connection or an O-ring seal structure. The powder spraying connection interface is located at the inlet end of the first channel section 44, and the interface type can include a threaded interface or a quick-connect interface. The transition area between the first channel section 44 and the second channel section 45 can be provided with a guide cone surface or an arc-shaped buffer structure to reduce fluid pressure loss.

[0058] By functional zoning and spatial restructuring, dust collection and powder delivery systems are physically isolated. The centralized arrangement of the dust extraction channels reduces pipe crossings and improves negative pressure suction efficiency; the segmented design of the powder delivery channels, through optimized interface positions, ensures the continuity of fluid pathways while avoiding interference with the dust extraction system.

[0059] Furthermore, in some embodiments, the first plate 30 and the second plate 40 are provided with first through holes that overlap in the vertical direction to form the upper dust suction port 32 and the lower dust suction port 42, and the first plate 30 and the second plate 40 are provided with second through holes that overlap in the vertical direction to form the upper powder spray port 31 and the lower powder spray port 41.

[0060] Specifically, the first and second through holes can be designed in circular, elliptical, or elongated shapes, with elongated holes being more conducive to achieving uniform powder spraying and dust collection. As a preferred embodiment, the edges of the first and second through holes can be chamfered or rounded to reduce airflow resistance and prevent dust accumulation. During assembly, precise alignment of the first plate 30 and the second plate 40 can be ensured using locating pins or guide posts, thereby achieving projection overlap of the through holes.

[0061] By setting a through-hole structure with overlapping projections on the first plate 30 and the second plate 40, precise vertical alignment of the upper dust suction port 32 and the lower dust suction port 42, and the upper powder spraying port 31 and the lower powder spraying port 41 can be ensured. This design allows the powder spraying and dust suction processes to be carried out simultaneously, avoiding problems such as waste of coating material or insufficient adsorption caused by hole position deviations. The through-hole structure with overlapping projections simplifies the manufacturing process and improves the assembly accuracy and operational reliability of the device.

[0062] Furthermore, in some embodiments, the lower end face of the upper punch 10 is provided with an upper concave cavity 11 that opens toward the upper powder spraying port 31, and the upper end face of the lower punch 20 is provided with a lower concave cavity 21 that faces the lower powder spraying port 41.

[0063] The directional concave structure allows the coating material ejected from the powder spraying nozzle to directly enter the corresponding concave cavity. The concave cavity extends in the same direction as the powder spraying nozzle, ensuring a perfect match between the spray trajectory and the collection area. This effectively prevents the coating material from adhering and accumulating on the end face of the punch, and also enables the directional recycling of the coating material.

[0064] Furthermore, in some embodiments, the length extension direction of the upper concave cavity 11 is the same as the length extension direction of the upper powder spraying nozzle 31, and the length extension direction of the lower concave cavity 21 is the same as the length extension direction of the lower powder spraying nozzle 41.

[0065] The opening directions of the upper cavity 11 and the lower cavity 21 are consistent with the spraying direction of the corresponding powder spraying nozzle, allowing the coating material to enter the cavity more accurately. The depth of the cavity can be adjusted according to actual needs. Consistency in the length extension direction can be achieved by using the same positioning reference as the powder spraying nozzle during punch machining, for example, symmetrical machining with the punch axis as the reference.

[0066] Precise alignment during the dynamic pressing process is achieved through geometric constraints. The opening direction design of the upper concave cavity 11 and the lower concave cavity 21 ensures that the powder spraying path is unobstructed, and the consistency in the length direction ensures that the coating material is evenly distributed along the axial direction of the punch. The synergistic effect of these two factors ensures that the powder spraying trajectory is perfectly matched with the powder receiving area of ​​the punch, effectively solving the problem of uneven coating material distribution caused by three-dimensional spatial misalignment in traditional tablet presses.

[0067] When using, such as Figure 5 and Figure 6 As shown, the coating material sprayed through the upper powder spray nozzle 31 and the lower powder spray nozzle 41 can cover the lower end face of the upper punch 10, the lower end face of the lower punch 20, and the material hole, forming a coating. During this process, the upper dust suction port 32 and the lower dust suction port 42 promptly absorb excess coating material, avoiding material waste and environmental pollution. Then, as shown in Figure 7, the feeding module injects effervescent tablet granules into the material hole. Figure 8 As shown, the upper punch 10 and lower punch 20 are controlled to extrude and form effervescent tablets in the material hole. Figure 9 As shown, the film is then extruded. After extrusion, due to the low compressibility of the coating material, the coating will gradually fall off as the screening machine vibrates, thus obtaining effervescent tablets.

[0068] This application also provides a powder spraying and suction device, the structure of which is the same as that of the powder spraying and suction device in the tablet press used to manufacture effervescent tablets, and will not be described in detail here.

[0069] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A powder spraying and suction device, characterized in that, The device includes a first working surface and a second working surface arranged opposite to each other. The first working surface has an upper powder spraying port and an upper dust suction port, and the second working surface has a lower powder spraying port and a lower dust suction port. The powder spraying and suction device is also provided with a powder spraying connection port and a dust suction connection port. The powder spraying connection port is connected to the upper powder spraying port and the lower powder spraying port, and the dust suction connection port is connected to the upper dust suction port and the lower dust suction port.

2. The powder spraying and suction device according to claim 1, characterized in that, Both the upper powder spray nozzle and the lower powder spray nozzle are elongated holes. There are at least two upper dust suction ports, which are located on both sides of the width direction of the upper powder spray nozzle. There are at least two lower dust suction ports, which are located on both sides of the width direction of the lower powder spray nozzle.

3. The powder spraying and suction device according to claim 2, characterized in that, The upper dust suction port is also an elongated hole and there are two of them, symmetrically distributed on both sides of the width direction of the upper powder spraying port and parallel to the upper powder spraying port; the lower dust suction port is also an elongated hole and there are two of them, symmetrically distributed on both sides of the width direction of the lower powder spraying port and parallel to the lower powder spraying port.

4. The powder spraying and suction device according to claim 2, characterized in that, The length of the upper dust suction port is greater than the length of the upper powder spraying port, and the length of the lower dust suction port is greater than the length of the lower powder spraying port.

5. The powder spraying and suction device according to claim 1, characterized in that, The powder spraying and dust suction device includes a first plate and a second plate that are fixedly connected. The powder spraying port and the dust suction port are located on the side of the first plate. The first working surface is located on the first plate, and the second working surface is located on the second plate.

6. The powder spraying and suction device according to claim 5, characterized in that, The powder spraying port is connected to the upper powder spraying port and the lower powder spraying port through the powder spraying connection channel, and the dust suction port is connected to the upper dust suction port and the lower dust suction port through the dust suction connection channel. The powder spraying connection channel and the dust suction connection channel are staggered in the vertical direction.

7. The powder spraying and suction device according to claim 5, characterized in that, The dust collection connection channel is located on the first plate, and the powder spraying connection channel includes a first channel segment located on the first plate and a second channel segment located on the second plate. The powder spraying connection interface is located at the entrance of the first channel segment.

8. The powder spraying and suction device according to claim 5, characterized in that, The first plate and the second plate are provided with first through holes whose projections in the vertical direction coincide to form the upper dust suction port and the lower dust suction port. The first plate and the second plate are provided with second through holes whose projections in the vertical direction coincide to form the upper powder spraying port and the lower powder spraying port.

9. A tablet compressor for manufacturing effervescent tablets, characterized in that, The device includes a material tray, a feeding module, an upper punch, a lower punch, and a powder spraying and suction device as described in any one of claims 1 to 8; the material tray has a material hole, the feeding module is used to add material into the material hole, the upper powder spraying port of the powder spraying and suction device is used to spray coating material onto the lower end face of the upper punch, the lower powder spraying port is used to spray coating material onto the lower end face of the upper punch and the material hole, and the upper and lower dust suction ports of the powder spraying and suction device are used to absorb excess coating material; The upper punch and the lower punch are used to extrude effervescent tablets in the material hole.

10. The tablet compressor for manufacturing effervescent tablets according to claim 9, characterized in that, The lower end face of the upper punch rod is provided with an upper concave cavity with an opening facing the upper powder spraying port, and the upper end face of the lower punch rod is provided with a lower concave cavity facing the lower powder spraying port.

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