Tabletting device of dry type granulator

Abstract

The utility model discloses a tabletting device of a dry type granulator, which comprises a first pressing wheel and a second pressing wheel which are arranged in a box body in a matching way, and a feeding cylinder is arranged corresponding to the feeding ends of the first pressing wheel and the second pressing wheel, and is characterized in that a first front scraper and a second front scraper are arranged on the feeding cylinder; the first front scraper is elastically pressed at the feeding end of the first pressing wheel, the second front scraper is elastically pressed at the feeding end of the second pressing wheel, the first rear scraper is elastically pressed at the discharging end of the first pressing wheel, and the second rear scraper is elastically pressed at the discharging end of the second pressing wheel. The material scraping device is simple in structure, reasonable in design and capable of ensuring that materials on the pressing wheels are scraped off, and therefore the quality of tableting is improved.

Description

Technical Field

[0001] This utility model relates to granulation machines, specifically to a tableting device for a dry granulation machine. Background Technology

[0002] Granulators are specialized equipment used in pharmaceuticals, food, and chemical industries. The tableting unit is used to compress mixed dry powder into tablets, which are then fed into the granulation assembly for granulation. Traditional tableting units have the following drawbacks: 1. The front and rear scraper structures corresponding to the pressure rollers are made of hard materials, but deviations are inevitable during actual assembly. This results in the front scraper structure failing to guarantee a tight seal during feeding, and the rear scraper structure failing to completely remove residual powder from the pressure rollers, affecting subsequent tableting operations. If the contact between the pressure rollers and scrapers is too tight, it will lead to excessive wear on the pressure rollers, affecting their service life and tablet quality; 2. The pressure from the pressure rollers to the supporting shaft during tableting is very high, causing significant deformation of the two pressure rollers and affecting tablet quality. Utility Model Content

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by this utility model is to provide a tableting device for a dry granulation machine to solve the above-mentioned problems.

[0004] Therefore, this utility model is implemented using the following solution:

[0005] A tableting device for a dry granulation machine includes a first pressure roller and a second pressure roller fitted together within a housing. A feeding cylinder is provided at the feed end corresponding to the first and second pressure rollers. The feeding cylinder is characterized by having a first front scraper and a second front scraper. The first front scraper is elastically pressed against the feed end of the first pressure roller, and the second front scraper is elastically pressed against the feed end of the second pressure roller. The device also includes a first rear scraper and a second rear scraper. The first rear scraper is elastically pressed against the discharge end of the first pressure roller, and the second rear scraper is elastically pressed against the discharge end of the second pressure roller.

[0006] It also includes a first rotating shaft and a second rotating shaft. The first rotating shaft is provided with a first transmission part, which is connected to a first pressure roller. The second rotating shaft is provided with a second transmission part, which is connected to a second pressure roller. The cross-sections of the first and second transmission parts are rectangular with rounded sides.

[0007] The first front scraper, the second front scraper, the first rear scraper, and the second rear scraper are all made of elastic steel.

[0008] An oil cooling chamber is provided inside the housing, and the first rotating shaft and the second rotating shaft are located inside the oil cooling chamber. An oil inlet connector and an oil outlet connector that communicate with the oil cooling chamber are connected to the housing.

[0009] A bracket is installed on the feeding cylinder, and a rubber spring is provided on the bracket. The rubber spring presses the sealing plate tightly against the two end faces of the first and second pressure rollers. The sealing plate, the first front scraper, the second front scraper, the first pressure roller, and the second pressure roller surround the powder pressing chamber.

[0010] The first motor drives the first pressure roller to rotate, and the second motor drives the second pressure roller to rotate.

[0011] The housing is provided with an air passage, and an air inlet connector is provided at the air inlet end of the air passage. The air outlet end of the air passage is aligned with the transmission sealing end of the first rotating shaft and the second rotating shaft.

[0012] The tableting device of a dry granulation machine described above, by setting elastic first and second front scrapers to elastically press against the feed end of the pressure roller, can ensure the sealing of the material during feeding. By setting elastic first and second rear scrapers to elastically press against the discharge end of the pressure roller, it can ensure that the material adhering to the pressure roller is scraped off cleanly. At the same time, this elastic pressing structure can avoid excessive contact friction between the scraper and the pressure roller, which would cause wear on the pressure roller, effectively improving its service life and tableting quality. Attached Figure Description

[0013] The present invention includes the following figures:

[0014] Figure 1 This is a front view of the internal structure of this utility model;

[0015] Figure 2 for Figure 1 A magnified view of the area pointed to by A in the middle;

[0016] Figure 3 This is a cross-sectional view of the feeding cylinder and pressure roller of this utility model;

[0017] Figure 4 This is a side view of the internal structure of this utility model. Detailed Implementation

[0018] As shown in the figure, the tableting device of a dry granulation machine disclosed in this utility model includes a first pressure roller 6 and a second pressure roller 2 arranged in a housing 1. A feeding cylinder 8 is provided at the feeding end of the first and second pressure rollers. A first front scraper 10 and a second front scraper 9 are provided on the feeding cylinder 8. The first front scraper 10 is elastically pressed against the feeding end of the first pressure roller 6, and the second front scraper 9 is elastically pressed against the feeding end of the second pressure roller 2. The device also includes a first rear scraper 5 and a second rear scraper 4. The first rear scraper 5 is elastically pressed against the discharge end of the first pressure roller 6, and the second rear scraper 4 is elastically pressed against the discharge end of the second pressure roller 2.

[0019] Furthermore, the system also includes a first rotating shaft 15 and a second rotating shaft 16. The first rotating shaft 15 is equipped with a first transmission part 7, which is connected to the first pressure roller 6. The second rotating shaft 16 is equipped with a second transmission part 3, which is connected to the second pressure roller 2. The cross-sections of the first and second transmission parts are rectangular with rounded sides. This specially shaped transmission part structure increases the cross-sectional area of ​​the rotating shaft, effectively reducing the deformation of the two pressure rollers during high-pressure pressing and improving the tablet quality.

[0020] Furthermore, the first front scraper 10, the second front scraper 9, the first rear scraper 5, and the second rear scraper 4 are all made of elastic steel. This ensures their strength and allows the scrapers to be elastically pressed against the pressure roller.

[0021] Furthermore, an oil cooling chamber 17 is provided inside the housing 1, and the first rotating shaft 15 and the second rotating shaft 16 are located inside the oil cooling chamber 17. An oil inlet connector 18 and an oil outlet connector 21 communicating with the oil cooling chamber 17 are connected to the housing 1. By setting up an oil cooling chamber and circulating cooling oil to cool the rotating shafts, cooling efficiency can be guaranteed and the cooling structure can be simplified.

[0022] Furthermore, a bracket 11 is installed on the feeding cylinder 8, and a rubber spring 12 is provided on the bracket 11. The rubber spring 12 presses the sealing plate 13 tightly against the two end faces of the first and second pressure rollers. The sealing plate 13, the first front scraper 10, the second front scraper 9, the first pressure roller 6, and the second pressure roller 2 surround the powder pressing chamber. With the above structure, the sealing plate 13 is compressed by the rubber spring 12 to elastically seal the two end faces of the pressure rollers. This ensures the reliability of the powder pressing chamber seal, reduces wear on the pressure rollers, ensures the stability of the pressure roller rotation, and extends their service life.

[0023] Furthermore, the first motor 14 drives the first pressure roller 6 to rotate, and the second motor 22 drives the second pressure roller 2 to rotate. In actual use, different pressure roller gaps are set according to different material requirements. In order to reduce the number of pressure rollers, first and second pressure rollers with different diameters are selected. By setting separate motors to drive the first and second pressure rollers to rotate, the two pressure rollers can be made to rotate at different speeds but with the same linear velocity, so that the two pressure rollers perform tableting operations at the same linear velocity, ensuring tableting quality.

[0024] Furthermore, the housing 1 is provided with an air passage 20, and an air inlet connector 19 is provided at the air inlet end of the air passage 20. The air outlet end of the air passage 20 is aligned with the transmission sealing end of the first rotating shaft 15 and the second rotating shaft 16. The transmission sealing end refers to the bearing end where the rotating shaft is supported for rotation and the location where the sealing element is installed. With the above structure, a high-pressure air seal can be achieved at this location, preventing powder from entering the subsequent transmission components and ensuring the stability and reliability of its operation.

[0025] In addition, the scraper, bracket and other parts adopt a quick-release structure, such as fastener connection or snap-fit ​​connection, to facilitate disassembly and cleaning.

[0026] The working principle of this utility model is as follows: the powder is first fed to the feeding end of the first and second pressure rollers through the feeding cylinder 8. The first and second pressure rollers work together to squeeze the powder and process it into a sheet before sending it out.

[0027] This invention features a structure where elastic first and second front scrapers are pressed against the feed end of the pressure roller, ensuring a sealed feed. The first and second rear scrapers are also pressed against the discharge end of the pressure roller, ensuring that material adhering to the roller is thoroughly scraped off. This elastic pressing structure also prevents excessive friction between the scrapers and the pressure roller, thus avoiding wear and effectively improving its service life and tablet quality.

Claims

1. A tableting device for a dry granulation machine, comprising a first pressure roller (6) and a second pressure roller (2) fitted together within a housing (1), and a feeding cylinder (8) provided at the feed ends corresponding to the first and second pressure rollers, characterized in that: The feeding cylinder (8) is provided with a first front scraper (10) and a second front scraper (9). The first front scraper (10) is elastically pressed against the feeding end of the first pressure roller (6), and the second front scraper (9) is elastically pressed against the feeding end of the second pressure roller (2). It also includes a first rear scraper (5) and a second rear scraper (4). The first rear scraper (5) is elastically pressed against the discharge end of the first pressure roller (6), and the second rear scraper (4) is elastically pressed against the discharge end of the second pressure roller (2).

2. The tableting device of a dry granulation machine according to claim 1, characterized in that: It also includes a first rotating shaft (15) and a second rotating shaft (16). The first rotating shaft (15) is provided with a first transmission part (7), which is connected to the first pressure roller (6). The second rotating shaft (16) is provided with a second transmission part (3), which is connected to the second pressure roller (2). The cross-sections of the first and second transmission parts are rectangular with rounded arcs on both sides.

3. The tableting device of a dry granulation machine according to claim 1, characterized in that: The first front scraper (10), the second front scraper (9), the first rear scraper (5), and the second rear scraper (4) are all made of elastic steel.

4. The tableting device of a dry granulation machine according to claim 2, characterized in that: The housing (1) is provided with an oil cooling chamber (17), and the first rotating shaft (15) and the second rotating shaft (16) are provided in the oil cooling chamber (17). The housing (1) is connected with an oil inlet connector (18) and an oil outlet connector (21) that communicate with the oil cooling chamber (17).

5. The tableting device of a dry granulation machine according to claim 1, characterized in that: A bracket (11) is installed on the feeding cylinder (8), and a rubber spring (12) is provided on the bracket (11). The rubber spring (12) presses the sealing plate (13) tightly against the two ends of the first and second pressure rollers. The sealing plate (13), the first front scraper (10), the second front scraper (9), the first pressure roller (6), and the second pressure roller (2) surround the powder pressing chamber.

6. The tableting device of a dry granulation machine according to claim 1, characterized in that: The first motor (14) drives the first pressure roller (6) to rotate, and the second motor (22) drives the second pressure roller (2) to rotate.

7. The tableting device of a dry granulation machine according to claim 1, characterized in that: An air passage (20) is provided on the housing (1), and an air inlet connector (19) is provided at the air inlet end of the air passage (20). The air outlet end of the air passage (20) is aligned with the transmission sealing end of the first rotating shaft (15) and the second rotating shaft (16).

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