A high-efficiency mixing device for granular materials in plastic film production

Abstract

The utility model discloses a granule high -efficient mixing device is used in plastic film production, including base, the top of base is fixedly installed with jar body, the top of jar body is fixedly installed with feed pipe, and the bottom of jar body is fixedly installed with the discharge pipe, the inside vertical rotation of jar body is equipped with a plurality of first and last connection's stirring shaft, and the connecting place of a plurality of stirring shafts is rotatory with support frame, and the both ends of support frame are fixedly connected with the inner side wall of jar body, and the shaft wall of a plurality of stirring shafts is fixedly installed with a plurality of even distribution's stirring vane, and the outer side wall of jar body is fixedly installed with the protective shroud, and the top of protective shroud is fixedly installed with motor, and the inside of protective shroud is equipped with the transmission mechanism of variable speed that is connected with the output of motor. The utility model can realize the differentiation of different height granule's stirring, satisfy the strong shear stirring intensity required by the high pressure granule of bottom, reduce the stirring damage risk of upper low pressure granule, and improve the quality stability of subsequent plastic film production.

Description

Technical Field

[0001] This utility model relates to the field of plastic film production technology, specifically to a high-efficiency mixing device for granular materials used in plastic film production. Background Technology

[0002] In the field of plastic film production, the uniformity of particle mixing directly affects the mechanical properties, light transmittance, and appearance quality of the film.

[0003] Existing plastic film granule mixing devices generally adopt a tank-type stirring structure. However, during the mixing process, the uneven stress caused by the different heights of the granules is significant: the granules at the bottom of the tank generate greater compressive force due to their stacking height, thus requiring a higher stirring intensity from the stirring paddle. Meanwhile, the granules at the top of the tank are in a loose state, and the pressure they experience is only 1 / 5 to 1 / 3 of that at the bottom. If the same stirring intensity is used as at the bottom, the high-speed rotating paddle will cause excessive shearing of the upper granules, resulting in granule breakage. This affects the melt uniformity of subsequent extrusion molding, and the film is prone to defects such as crystal points and decreased tensile strength.

[0004] Therefore, a high-efficiency mixing device for granular materials in plastic film production is proposed. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an efficient mixing device for granular materials in plastic film production, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution.

[0007] This utility model provides a high-efficiency mixing device for granular materials in plastic film production, including a base, a tank body fixedly mounted on the top of the base, a feed pipe fixedly mounted on the top of the tank body, and a discharge pipe fixedly mounted on the bottom of the tank body. Multiple stirring shafts connected end to end are vertically rotatably mounted inside the tank body, and a support frame is rotatably mounted between the joints of the multiple stirring shafts. The two ends of the support frame are fixedly connected to the inner sidewall of the tank body, and multiple uniformly distributed stirring blades are fixedly mounted on the shaft walls of the multiple stirring shafts. A protective cover is fixedly installed on the outer wall of the tank, a motor is fixedly installed on the top of the protective cover, and a speed-changing transmission mechanism connected to the output end of the motor is provided inside the protective cover. The speed-changing transmission mechanism is connected to the shaft wall of the plurality of stirring shafts.

[0008] Preferably, the transmission mechanism includes a drive shaft vertically rotatably disposed inside the protective cover. The upper end of the drive shaft is fixedly connected to the output end of the motor. The shaft wall of the drive shaft is fixedly provided with a plurality of evenly distributed first bevel gears. The side wall of the tank is rotatably provided with a plurality of evenly distributed transmission shafts. One end of each of the plurality of transmission shafts extends into the interior of the protective cover and is fixedly provided with a second bevel gear. The plurality of first bevel gears and the plurality of second bevel gears are meshed together. The other end of each of the plurality of transmission shafts is fixedly provided with a third bevel gear. The shaft wall of each of the plurality of stirring shafts is fixedly provided with a fourth bevel gear. The plurality of third bevel gears and the plurality of fourth bevel gears are meshed together.

[0009] Preferably, the diameters of the plurality of first bevel gears are arranged in ascending order from top to bottom.

[0010] Preferably, a sealing assembly is provided between the plurality of drive shafts and the side wall of the tank.

[0011] Preferably, a plurality of evenly distributed support columns are fixedly provided at the top edge of the base, and the upper ends of the plurality of support columns are fixedly connected to the bottom of the tank.

[0012] Preferably, the lower end of the discharge pipe is threaded with a pipe cap, and the top of the pipe cap is fixedly provided with a sealing head extending into the interior of the discharge pipe.

[0013] Preferably, a circular guide groove is provided at the bottom of the tank and at the upper opening of the discharge pipe, and a scraper is fixedly provided on the shaft wall of the stirring shaft below, with the bottom of the scraper in contact with the bottom inner wall of the tank.

[0014] Compared with the prior art, the present invention has the following beneficial effects: By utilizing the design where the diameter of the first bevel gear increases from top to bottom, the upper stirring shaft of the tank rotates at a slower speed, reducing excessive shearing of the upper granules and preventing breakage damage. The middle stirring shaft rotates at a moderate speed, while the lower stirring shaft rotates at a faster speed, enhancing the mixing intensity of the compacted granules and ensuring thorough mixing of the bottom granules. Through the speed difference of the transmission system, differentiated mixing of granules at different heights is achieved. This satisfies the strong shear mixing intensity required for the high-pressure granules at the bottom while reducing the risk of mixing damage to the low-pressure granules at the top, ensuring uniform mixing of multi-component granules and improving the quality stability of subsequent plastic film production. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention from a first-person perspective; Figure 2 This is a three-dimensional structural diagram of the present invention from a second perspective; Figure 3This is a three-dimensional structural diagram of the tank body of this utility model cut open; Figure 4 This is a three-dimensional structural diagram of a portion of the tank body of this utility model.

[0016] In the diagram: 1. Base; 2. Tank body; 3. Feed pipe; 4. Discharge pipe; 5. Stirring shaft; 6. Support frame; 7. Stirring blade; 8. Protective cover; 9. Motor; 10. Drive shaft; 11. First bevel gear; 12. Transmission shaft; 13. Second bevel gear; 14. Third bevel gear; 15. Fourth bevel gear; 16. Support column; 17. Pipe cover; 18. Sealing head; 19. Circular guide channel; 20. Scraper. Detailed Implementation

[0017] A high-efficiency mixing device for granular materials in plastic film production, such as Figure 1-4 As shown, the system includes a base 1, a tank 2 fixedly mounted on top of the base 1, an inlet pipe 3 fixedly mounted on top of the tank 2, and an outlet pipe 4 fixedly mounted on bottom of the tank 2. A pipe cap 17 is threaded onto the lower end of the outlet pipe 4, and a sealing head 18 extending into the outlet pipe 4 is fixedly mounted on top of the pipe cap 17. The pipe cap 17 and the sealing head 18 seal the interior of the outlet pipe 4, preventing the accumulation of granular material and subsequent mixing. Multiple evenly distributed support columns 16 are fixedly mounted on the top edge of the base 1, with the upper ends of each support column 16 fixedly connected to the bottom of the tank 2. The discharge pipe 4 is raised to a certain height to facilitate the placement of the receiving device below the discharge pipe 4; multiple stirring shafts 5 connected end to end are vertically rotatably arranged inside the tank, and a support frame 6 is rotatably arranged between the joints of the multiple stirring shafts 5, and the two ends of the support frame 6 are fixedly connected to the inner side wall of the tank 2. Multiple evenly distributed stirring blades 7 are fixedly arranged on the shaft wall of the multiple stirring shafts 5. A protective cover 8 is fixedly arranged on the outer side wall of the tank 2, and a motor 9 is fixedly arranged on the top of the protective cover 8. The inside of the protective cover 8 is equipped with a speed transmission mechanism connected to the output end of the motor 9, and the speed transmission mechanism is connected to the shaft wall of the multiple stirring shafts 5.

[0018] The transmission mechanism includes a drive shaft 10 vertically rotatably disposed inside the protective cover 8. The upper end of the drive shaft 10 is fixedly connected to the output end of the motor 9. The shaft wall of the drive shaft 10 is fixedly provided with a plurality of evenly distributed first bevel gears 11, the diameter of which increases sequentially from top to bottom. The side wall of the tank 2 is rotatably provided with a plurality of evenly distributed transmission shafts 12. One end of each transmission shaft 12 extends into the interior of the protective cover 8 and is fixedly provided with a second bevel gear 13. A sealing assembly is provided between the transmission shafts 12 and the side wall of the tank 2 to prevent particulate dust from leaking from the gap between the transmission shafts 12 and the side wall of the tank 2. The plurality of first bevel gears 11 and the plurality of second bevel gears 13 are meshed. The other end of each transmission shaft 12 is fixedly provided with a third bevel gear 14. The shaft wall of each of the plurality of stirring shafts 5 is fixedly provided with a fourth bevel gear 15, the plurality of third bevel gears 14 and the plurality of fourth bevel gears 15 are meshed.

[0019] A circular guide groove 19 is provided at the bottom of the tank body 2 and at the upper opening of the discharge pipe 4. A scraper 20 is fixedly provided on the shaft wall of the stirring shaft 5 below, and the bottom of the scraper 20 is in contact with the bottom inner wall of the tank body 2. The scraper 20 of the stirring shaft 5 below rotates close to the bottom inner wall of the tank body 2 to scrape up the bottom particles to avoid accumulation. The mixed particles are collected through the circular guide groove 19 to the discharge pipe 4. The material can be discharged by opening the pipe cover 17.

[0020] In summary: First, the worker adds the granular material into the tank 2 through the feed pipe 3. Then, the motor 9 is started, driving the drive shaft 10 to rotate. Multiple first bevel gears 11, whose diameters increase sequentially from top to bottom on the drive shaft 10, rotate accordingly. Second bevel gears 13, meshing with the first bevel gears 11, drive the transmission shaft 12 to rotate. A third bevel gear 14 at the other end of the transmission shaft 12 meshes with a fourth bevel gear 15 on the stirring shaft 5, thus causing the multiple stirring shafts 5 to rotate. Because the diameter of the first bevel gears 11 increases from top to bottom, the lower first bevel gear 11 drives the transmission shaft 12 and stirring shaft 5 at a faster speed, while the upper first bevel gear 11 drives the stirring shaft 5 at a slower speed. This allows the upper stirring shaft 5 inside the tank 2 to slowly stir the loose granular material with the stirring blades 7. The middle stirring shaft 5 drives the stirring blades 7 at a medium speed to perform medium-intensity stirring of the compacted granules in the middle, while the lower stirring shaft 5 drives the stirring blades 7 at a higher speed to perform high-intensity stirring of the compacted granules. This allows for the use of different stirring intensities to stir granules of different heights, avoiding damage to the granules and ensuring the production quality of the subsequent plastic film. During the stirring process, the scraper 20 located on the lower stirring shaft 5 rotates close to the inner wall of the bottom of the tank 2, scraping up the bottom granules to prevent accumulation. The mixed granules are collected through the circular guide channel 19 to the discharge pipe 4, and can be discharged by opening the pipe cover 17. The support frame 6 provides support at the connection points of multiple stirring shafts 5 to ensure rotational stability, and the sealing component prevents granule dust from leaking from the gap between the drive shaft 12 and the side wall of the tank 2.

[0021] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency mixing device for granular materials in plastic film production, comprising a base (1), characterized in that: The base (1) is fixedly provided with a tank (2) at the top, a feed pipe (3) is fixedly provided at the top of the tank (2), and a discharge pipe (4) is fixedly provided at the bottom of the tank (2). The tank (2) is vertically rotatably provided with multiple stirring shafts (5) connected end to end. A support frame (6) is rotatably provided between the connection points of the multiple stirring shafts (5). The two ends of the support frame (6) are fixedly connected to the inner side wall of the tank (2). Multiple uniformly distributed stirring blades (7) are fixedly provided on the shaft walls of the multiple stirring shafts (5). The outer wall of the tank (2) is fixedly provided with a protective cover (8), the top of the protective cover (8) is fixedly provided with a motor (9), and the inside of the protective cover (8) is provided with a speed transmission mechanism connected to the output end of the motor (9), and the speed transmission mechanism is connected to the shaft wall of multiple stirring shafts (5). The transmission mechanism includes a drive shaft (10) that is vertically rotatably disposed inside the protective cover (8). The upper end of the drive shaft (10) is fixedly connected to the output end of the motor (9). The shaft wall of the drive shaft (10) is fixedly provided with a plurality of evenly distributed first bevel gears (11). The side wall of the tank (2) is rotatably provided with a plurality of evenly distributed transmission shafts (12). One end of each of the transmission shafts (12) extends into the interior of the protective cover (8) and is fixedly provided with a second bevel gear (13). The plurality of first bevel gears (11) and the plurality of second bevel gears (13) are meshed together. The other end of each of the transmission shafts (12) is fixedly provided with a third bevel gear (14). The shaft wall of each of the stirring shafts (5) is fixedly provided with a fourth bevel gear (15). The plurality of third bevel gears (14) and the plurality of fourth bevel gears (15) are meshed together.

2. The high-efficiency mixing device for granular materials in plastic film production according to claim 1, characterized in that: The diameters of the plurality of first bevel gears (11) are arranged in ascending order from top to bottom.

3. The high-efficiency mixing device for granular materials in plastic film production according to claim 1, characterized in that: A sealing assembly is provided between the plurality of drive shafts (12) and the side wall of the tank (2).

4. The high-efficiency mixing device for granular materials in plastic film production according to claim 1, characterized in that: The base (1) has a plurality of evenly distributed support columns (16) fixedly installed at the top edge, and the upper ends of the plurality of support columns (16) are fixedly connected to the bottom of the tank (2).

5. The high-efficiency mixing device for granular materials in plastic film production according to claim 1, characterized in that: The lower end of the discharge pipe (4) is threaded with a pipe cap (17), and the top of the pipe cap (17) is fixedly provided with a sealing head (18) extending into the interior of the discharge pipe (4).

6. The high-efficiency mixing device for granular materials in plastic film production according to claim 1, characterized in that: A circular guide groove (19) is provided at the bottom of the tank (2) and at the upper opening of the discharge pipe (4). A scraper (20) is fixedly provided on the shaft wall of the stirring shaft (5) below, and the bottom of the scraper (20) is in contact with the bottom inner wall of the tank (2).

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