Polyester yarn nano-antibacterial master batch preparation device and preparation method thereof

Abstract

The invention relates to the technical field of antibacterial master batch preparation, and discloses a polyester yarn nano antibacterial master batch preparation device and a preparation method thereof.The polyester yarn nano antibacterial master batch preparation device comprises an extruder main body, a feeding bin and a discharging sleeve, a driving motor is installed on the upper portion of the side, away from the extruder main body, of the discharging sleeve, and a centrifugal fan is arranged on the rear side of the discharging sleeve; according to the antibacterial master batch feeding device, air cooling is matched with the conveying belt, during discharging, antibacterial master batches can be cooled, after the antibacterial master batches blown into the conveying belt are pushed by the partition plate to be dislocated from the discharging opening, the antibacterial master batches can be fed into the conveying belt, and the antibacterial master batches can be fed into the conveying belt through the centrifugal fan. According to the polyester yarn nano-antibacterial master batch preparation device, the polyester yarn nano-antibacterial master batch can stably fall on the conveying belt for discharging, the problem that when existing polyester yarn nano-antibacterial master batch preparation is carried out, master batch collection and cooling after extrusion granulation are inconvenient is solved, stable discharging can be guaranteed while uniform cooling is carried out, and the practicability of the polyester yarn nano-antibacterial master batch preparation device is improved.

Description

Technical Field

[0001] This invention relates to the field of antibacterial masterbatch preparation technology, specifically a polyester filament nano-antibacterial masterbatch preparation device and preparation method. Background Technology

[0002] Polyester nano antibacterial masterbatch, a functional additive masterbatch specifically for polyester fiber production, is added during the spinning process to give polyester fibers long-lasting antibacterial properties. It is widely used in clothing, home textiles and various textiles. Antibacterial polyester masterbatch is made by grinding nano antibacterial agents into powder, mixing the antibacterial additives with polyester chips through a special dispersion technology, and then plasticizing and granulating the mixture through a plasticizer and extruder.

[0003] According to Chinese Patent Publication No. CN115256865B, an extruder for injection molding of plastic products addresses the problems of existing raw material particles being too large, easily clogging the extruder, leading to extrusion failure, and the extruded material temperature being too high, making timely collection difficult. The proposed solution includes a cooling box, a screening box fixedly connected to one side of the cooling box, an extruder body located on one side of the cooling box, a discharge port on one side of the cooling box, and a rotating cylinder rotatably passing through the inner wall of the discharge port, the rotating cylinder being connected to the discharge end of the extruder body. A collection box is located on one side of the cooling box. In this invention, by setting up the screening box, the size of the raw material can be screened, preventing larger raw materials from entering the extruder body and causing blockage or even damage to the machine, significantly extending the service life of the device. Simultaneously, multiple fan blades cool the extruded material, significantly reducing working time.

[0004] However, in the existing process of preparing polyester filament antibacterial masterbatch, after the material is extruded through the extrusion tube during extrusion granulation, the drive motor drives the blades to cut and granulate it. The resulting polyester filament antibacterial masterbatch is still at a high temperature when it is discharged and has not been completely cooled and shaped. Most existing polyester filament antibacterial masterbatch extruders use air cooling or water cooling after granulation. Air cooling causes the masterbatch to scatter everywhere and become too dispersed to be collected stably. Water cooling can only cool the inner or outer ring, which can easily lead to uneven cooling and greatly reduces the practicality of the preparation device. Summary of the Invention

[0005] To address the inconvenience of collecting and cooling the masterbatch after extrusion granulation in the preparation of existing polyester filament antibacterial masterbatches, this invention provides a polyester filament antibacterial masterbatch preparation device and method to solve the aforementioned problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A device for preparing polyester filament nano-antibacterial masterbatch includes an extruder body, a feeding hopper, and a discharge sleeve. A drive motor is installed on the upper part of the discharge sleeve away from the extruder body. A centrifugal fan is arranged on the rear side of the discharge sleeve and is mounted on the top surface of a support frame. A guide pipe is fixedly connected through the bottom of the drive motor. The rear side of the guide pipe is fixedly connected to the output end of the centrifugal fan. The end of the guide pipe away from the centrifugal fan is fixedly connected to a collection box. Two conveyor rollers are rotatably connected inside the collection box. A conveyor belt is driven and mounted on the two conveyor rollers. Several partition plates are fixedly fixed at equal intervals on the outer surface of the conveyor belt to block airflow.

[0007] Furthermore, an air inlet is provided on one side of the centrifugal fan, and a dust filter screen is fixed inside the air inlet. A pulley is rotatably connected to the center of the air inlet via a bearing. One end of the pulley, which extends into the centrifugal fan, is fixed to the impeller inside the centrifugal fan to drive the impeller to rotate. Another pulley is fixed to the output end of the drive motor, and the two pulleys are connected by a belt.

[0008] Furthermore, the bottom of the guide pipe is provided with a feed groove that cooperates with the discharge sleeve, and the front side of the collection box is provided with a discharge port that cooperates with the guide pipe. Sound insulation cotton is glued to the outer surface of the guide pipe and the collection box.

[0009] Furthermore, the distance between any two adjacent partition plates is greater than the diameter of the discharge port, the height of the partition plate is equal to the distance between the conveyor belt and the edge of the inner wall of the collection box, the distance between the top surface of the conveyor belt and the top surface of the inner wall of the collection box is greater than the height of the discharge port, and the front and rear ends of the conveyor belt and the partition plates are slidably attached to the inner wall of the collection box.

[0010] Furthermore, the end of the collection box away from the guide pipe is provided with a discharge port, and a guide plate is fixed at the bottom of the discharge port. The side of the guide plate facing the conveyor roller is set as an arc with the same center as the conveyor roller and the partition plate as the radius. The top surface of the guide plate is located below the bottom surface of the conveyor belt, and the width of the partition plate is greater than the distance between the side end of the discharge port and the conveyor roller.

[0011] Furthermore, the conveying roller near the end of the guide pipe rotates and extends to the rear of the collection box. A reduction gear two is fixed to one end of the conveying roller extending to the rear of the collection box. A reduction gear one is meshed above the reduction gear two. The reduction gear one is rotatably connected to the rear wall of the collection box. A bevel gear two is fixed to the rear side of the reduction gear one. A bevel gear one is meshed to the side of the bevel gear two. The bevel gear one is rotatably connected to a fixed block. The fixed block is fixed to the rear wall of the collection box. A pulley two is connected inside the fixed block. The pulley two and the pulley one are connected by another belt two.

[0012] Furthermore, a cooling pipe is sleeved inside the conveyor belt between the two conveyor rollers. The cooling pipe is fixedly installed on the inner wall of the collection box. A direct cooling refrigerator is installed on the front side wall of the collection box. The output end of the direct cooling refrigerator is fixedly connected to the cooling pipe. The cooling pipe is configured as a serpentine bend.

[0013] Furthermore, support slide rods are fixed on the front and rear inner walls of the collection box above the discharge port. Each partition plate has a limiting slide groove that cooperates with the support slide rod on its front and rear sides away from the end of the conveyor belt. The distance between the two ends of the support slide rods and the two ends of the straight section of the conveyor belt is equal to the thickness of the partition plate.

[0014] Furthermore, the diameter of the second bevel gear is larger than the diameter of the first bevel gear, and the diameter of the second reduction gear is larger than the diameter of the first reduction gear, which is used to reduce the speed of the conveyor roller.

[0015] Furthermore, a method for preparing polyester filament nano-antibacterial masterbatch includes the following steps: Step A: Extruder operation for granulation; Step A1: After mixing the antibacterial agent, dispersant, compatibilizer, graft modifier and excipient resin at high temperature, the mixture is fed into the screw through the hopper. It enters the screw groove by its own weight or under the action of the forced feeder. The mixed material is conveyed and compacted forward by the screw. During the conveying process, the temperature gradually increases. Step A2: Under the action of heating outside the barrel and strong stirring, mixing and shearing friction between the screw and the barrel surface, the temperature of the mixed material rises to the melting point and begins to melt. The molten mixed material is extruded from the extruder head in a constant pressure, constant temperature and quantitative manner. Step A3: The extruded polyester nano antibacterial strip enters the discharge sleeve. At this time, the drive motor runs and drives the cutting blade to rotate and cut the polyester nano antibacterial strip of the extruder head. The cut polyester nano antibacterial masterbatch falls into the guide tube through the discharge sleeve. Step B: Collection of antibacterial masterbatch; Step B1: When the drive motor is running, it drives the first pulley on the centrifugal fan to rotate via belt one. Belt one drives the impeller inside the centrifugal fan to rotate, blowing the masterbatch into the collection box through the discharge port. At the same time, the masterbatch is cooled by air. While belt one is rotating, belt two drives belt two to rotate. Step B2: The rotation of pulley two drives bevel gear one to rotate, bevel gear one drives bevel gear two to rotate, bevel gear two drives reduction gear one to rotate, reduction gear one drives reduction gear two to rotate, reduction gear one drives reduction gear two to rotate, reduction gear two drives the conveyor roller to rotate, thus reducing speed and driving the conveyor roller to rotate towards the discharge port side, thereby causing the conveyor belt to move towards the discharge port side. Step B3: The masterbatch entering the collection box through the discharge port is blown between the two partition plates. At the same time, the conveyor belt drives the partition plates to move slowly along the support slide bar inside the collection box. When the two partition plates move with the masterbatch between them and the discharge port, the centrifugal fan stops blowing on the masterbatch. The conveyor belt and partition plates continue to drive the masterbatch to move. After moving to the discharge port, the side partition plate rotates and tilts to discharge the masterbatch. Step C: When the masterbatch moves inside the collection box, turn on the direct cooling refrigeration unit to cool the cooling pipes. The cooling pipes then cool the masterbatch on top of the conveyor belt, thereby further cooling the masterbatch.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, by using air cooling in conjunction with a conveyor belt, the antibacterial masterbatch can be cooled during feeding. After being pushed onto the conveyor belt by the partition plate to be misaligned with the discharge port, the antibacterial masterbatch can fall stably onto the conveyor belt for discharge. This solves the problem of inconvenient collection and cooling of masterbatch after extrusion granulation in the existing preparation of polyester filament nano antibacterial masterbatch. While ensuring uniform cooling, it can also ensure stable feeding, thus improving the practicality of the polyester filament nano antibacterial masterbatch preparation device.

[0017] 2. In this invention, through the transmission of the connecting structure, when the drive motor drives the blade to cut and granulate, it drives the fan to blow the antibacterial masterbatch. This facilitates the movement of the masterbatch quick collection box inside the box, while also allowing for uniform air cooling of the masterbatch. The coordinated operation makes the preparation device more convenient to control during use.

[0018] 3. In this invention, by combining a direct cooling refrigerator and a cooling pipe, the antibacterial masterbatch can be further cooled while the conveyor belt drives the antibacterial masterbatch to move and discharge, thereby ensuring the cooling effect and facilitating the direct collection of the discharged antibacterial masterbatch, which further improves the practicality of the polyester filament nano antibacterial masterbatch preparation device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural schematic diagram of a preparation apparatus according to an embodiment of this application; Figure 2 yes Figure 1 A three-dimensional structural schematic diagram of the preparation device from another perspective in the illustrated embodiment; Figure 3 yes Figure 1 A three-dimensional structural diagram of the back of the preparation device in the illustrated embodiment; Figure 4 yes Figure 1 A schematic cross-sectional view of a partial structure of the preparation device in the illustrated embodiment; Figure 5 yes Figure 1 A schematic cross-sectional view of the collection box structure in the embodiment shown; Figure 6 yes Figure 1 A schematic diagram of the three-dimensional structure of the cooling pipe in the embodiment shown; Figure 7 yes Figure 1 A three-dimensional schematic diagram of a partial structure of the preparation device in the illustrated embodiment.

[0021] The meanings of the reference numerals in the diagram are as follows: 1. Extruder body; 2. Feed hopper; 3. Discharge sleeve; 4. Centrifugal fan; 5. Air inlet; 6. Support frame; 7. Guide pipe; 8. Collection box; 9. Conveyor roller; 10. Conveyor belt; 11. Divider plate; 12. Discharge port; 13. Outlet; 14. Guide plate; 15. Direct cooler; 16. Cooling pipe; 17. Pulley 1; 18. Drive motor; 19. Belt 1; 20. Pulley 2; 21. Belt 2; 22. Fixing block; 23. Bevel gear 1; 24. Bevel gear 2; 25. Reduction gear 1; 26. Reduction gear 2; 27. Support slide bar; 28. Limiting slide groove. Detailed Implementation

[0022] To make the purpose, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] Example 1: Reference Figure 1 , Figure 2 and Figure 4This embodiment provides a device for preparing polyester filament nano-antibacterial masterbatch, including an extruder body 1, a feeding hopper 2, and a discharge sleeve 3. A drive motor 18 is installed on the upper part of the discharge sleeve 3 away from the extruder body 1. A centrifugal fan 4 is arranged on the rear side of the discharge sleeve 3. An air inlet 5 is opened on one side of the centrifugal fan 4. A dust filter screen is fixed inside the air inlet 5. A pulley 17 is rotatably connected to the center of the air inlet 5 through a bearing. One end of the pulley 17, which passes through the centrifugal fan 4, is fixed to the impeller inside the centrifugal fan 4 to drive the impeller to rotate. Another... One pulley 17 is connected to the other two pulleys 17 by a belt 19. The centrifugal fan 4 is mounted on the top surface of the support frame 6. The bottom of the drive motor 18 is fixed with a guide pipe 7. The rear side of the guide pipe 7 is fixed to the output end of the centrifugal fan 4. The end of the guide pipe 7 away from the centrifugal fan 4 is fixed to the collection box 8. Sound insulation cotton is glued to the outer surface of the guide pipe 7 and the collection box 8. Two conveyor rollers 9 are rotatably connected inside the collection box 8. A conveyor belt 10 is driven on the two conveyor rollers 9. Several partition plates 11 are fixed at equal intervals on the outer surface of the conveyor belt 10 to block the airflow.

[0024] Specifically, the bottom of the guide pipe 7 has a feed groove that mates with the discharge sleeve 3, and the front side of the collection box 8 has a discharge port 13 that mates with the guide pipe 7. The distance between any two adjacent partition plates 11 is greater than the diameter of the discharge port 13. The height of the partition plate 11 is equal to the distance between the conveyor belt 10 and the edge of the inner wall of the collection box 8. The distance between the top surface of the conveyor belt 10 and the top surface of the inner wall of the collection box 8 is greater than the height of the discharge port 13. The front and rear ends of the conveyor belt 10 and the partition plates 11 slide against the inner wall of the collection box 8, facilitating the clamping of the two partition plates 11. The masterbatch is collected on both sides of the discharge port 13. The conveyor belt 10 drives the masterbatch to move and discharge, which also avoids discharge blockage. The end of the collection box 8 away from the guide pipe 7 is provided with a discharge port 12. A guide plate 14 is fixed at the bottom of the discharge port 12. The side of the guide plate 14 facing the conveyor roller 9 is set as an arc with the same center as the conveyor roller 9 and the partition plate 11 as the radius. The top surface of the guide plate 14 is located below the bottom surface of the conveyor belt 10, ensuring that the partition plate 11 can rotate to tilt downward and discharge. The width of the partition plate 11 is greater than the distance between the side end of the discharge port 12 and the conveyor roller 9.

[0025] As an optimization solution, such as Figure 4 , Figure 5 and Figure 6As shown, support slide rods 27 are fixed on the front and rear inner walls of the collection box 8 above the discharge port 13. Each partition plate 11 has a limiting slide groove 28 that cooperates with the support slide rod 27 on the front and rear sides away from the end of the conveyor belt 10. The distance between the two ends of the support slide rod 27 and the two ends of the straight section of the conveyor belt 10 is equal to the thickness of the partition plate 11, so as to avoid the support slide rod 27 affecting the normal movement trajectory of the partition plate 11. A cooling pipe 16 is sleeved inside the conveyor belt 10 between the two conveyor rollers 9. The cooling pipe 16 is fixedly installed on the inner wall of the collection box 8. A direct cooling refrigerator 15 is installed on the front side wall of the collection box 8. The output end of the direct cooling refrigerator 15 is fixedly connected to the cooling pipe 16. The cooling pipe 16 is set in a serpentine bend to increase the cooling area and ensure the cooling effect.

[0026] As a further optimization scheme, such as Figure 3 and Figure 7 As shown, the conveyor roller 9 near the end of the guide pipe 7 rotates and extends to the rear of the collection box 8. A reduction gear 26 is fixed to one end of the conveyor roller 9 extending to the rear of the collection box 8. A reduction gear 25 is meshed above the reduction gear 26. The reduction gear 25 is rotatably connected to the rear wall of the collection box 8. A bevel gear 24 is fixed to the rear side of the reduction gear 25. A bevel gear 23 is meshed to the side of the bevel gear 24. The diameter of the bevel gear 24 is larger than the diameter of the bevel gear 23. The diameter of the reduction gear 26 is larger than the diameter of the reduction gear 25. This is used to reduce the speed of the conveyor roller 9, so that after a certain amount of masterbatch is collected between the two separator plates 11, it moves to a position offset from the discharge port 13. The bevel gear 23 is rotatably connected to the fixing block 22. The fixing block 22 is fixed to the rear wall of the collection box 8. A pulley 20 is connected inside the fixing block 22. The pulley 20 and the pulley 17 are connected by another belt 21.

[0027] Example 2: Reference Figures 1 to 7 This embodiment provides a method for preparing and using polyester filament nano-antibacterial masterbatch, including the following steps: Step A: Extruder operation for granulation; Step A1: After mixing the antibacterial agent, dispersant, compatibilizer, graft modifier and excipient resin at high temperature, the mixture is fed into the screw through the hopper. It enters the screw groove by its own weight or under the action of the forced feeder. The mixed material is conveyed and compacted forward by the screw. During the conveying process, the temperature gradually increases. Step A2: Under the action of heating outside the barrel and strong stirring, mixing and shearing friction between the screw and the barrel surface, the temperature of the mixed material rises to the melting point and begins to melt. The molten mixed material is extruded from the extruder head in a constant pressure, constant temperature and quantitative manner. Step A3: The extruded polyester nano antibacterial strip enters the discharge sleeve 3. At this time, the drive motor 18 runs and drives the cutting blade to rotate and cut the polyester nano antibacterial strip of the extrusion head. The cut polyester nano antibacterial masterbatch falls into the guide tube 7 through the discharge sleeve 3. Step B: Collection of antibacterial masterbatch; Step B1: When the drive motor 18 is running, it drives the pulley 17 on the centrifugal fan 4 to rotate via belt 19. The pulley 17 drives the impeller inside the centrifugal fan 4 to rotate, blowing the masterbatch into the collection box 8 through the discharge port 13. At the same time, the masterbatch is cooled by air. While the pulley 17 is rotating, it drives the pulley 20 to rotate via belt 21. Step B2: The rotation of pulley 20 drives bevel gear 23 to rotate, which in turn drives bevel gear 24 to rotate. Bevel gear 24 drives reduction gear 25 to rotate, which in turn drives reduction gear 26 to rotate. Reduction gear 26 drives conveyor roller 9 to rotate, thereby reducing the speed and causing conveyor roller 9 to rotate toward discharge port 12, which in turn causes conveyor belt 10 to move toward discharge port 12. Step B3: The masterbatch entering the collection box 8 through the discharge port 13 is blown between the two partition plates 11. At the same time, the conveyor belt 10 drives the partition plates 11 to move slowly along the support slide bar 27 inside the collection box 8. When the two partition plates 11 move with the masterbatch between them and the discharge port 13, the centrifugal fan 4 stops blowing on the masterbatch. The conveyor belt 10 and the partition plates 11 continue to drive the masterbatch to move. After moving to the discharge port 12, the side partition plate 11 rotates and tilts to discharge the masterbatch. Step C: When the masterbatch moves inside the collection box 8, turn on the direct cooling refrigeration unit 15 to cool the cooling pipe 16. The cooling pipe 16 then cools the masterbatch on the top of the conveyor belt 10, thereby further cooling the masterbatch.

[0028] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalent elements of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A device for preparing polyester filament nano-antibacterial masterbatch, characterized in that: The extruder includes a main body (1), a feed hopper (2), and a discharge sleeve (3). A drive motor (18) is installed on the upper part of the discharge sleeve (3) away from the main body (1). A centrifugal fan (4) is installed on the rear side of the discharge sleeve (3). The centrifugal fan (4) is installed on the top surface of the support frame (6). A guide pipe (7) is fixed through the bottom of the drive motor (18). The rear side of the guide pipe (7) is fixedly connected to the output end of the centrifugal fan (4). The end of the guide pipe (7) away from the centrifugal fan (4) is fixed through the collection box (8). Two conveyor rollers (9) are rotatably connected inside the collection box (8). A conveyor belt (10) is driven and sleeved on the two conveyor rollers (9). Several partition plates (11) are fixed at equal intervals on the outer surface of the conveyor belt (10) to block the airflow.

2. The apparatus for preparing polyester filament nano-antibacterial masterbatch according to claim 1, characterized in that: The centrifugal fan (4) has an air inlet (5) on one side. A dust filter is fixed inside the air inlet (5). A pulley (17) is rotatably connected to the center of the air inlet (5) via a bearing. One end of the pulley (17) that passes through the centrifugal fan (4) is fixed to the impeller inside the centrifugal fan (4) to drive the impeller to rotate. Another pulley (17) is fixed to the output end of the drive motor (18). The two pulleys (17) are connected by a belt (19).

3. The apparatus for preparing polyester filament nano-antibacterial masterbatch according to claim 1, characterized in that: The bottom of the guide pipe (7) is provided with a feed channel that cooperates with the discharge sleeve (3), and the front side of the collection box (8) is provided with a discharge port (13) that cooperates with the guide pipe (7). Sound insulation cotton is glued to the outer surface of the guide pipe (7) and the collection box (8).

4. The apparatus for preparing polyester filament nano-antibacterial masterbatch according to claim 3, characterized in that: The distance between any two adjacent partition plates (11) is greater than the diameter of the discharge port (13). The height of the partition plate (11) is equal to the distance between the conveyor belt (10) and the inner wall edge of the collection box (8). The distance between the top surface of the conveyor belt (10) and the top surface of the inner wall of the collection box (8) is greater than the height of the discharge port (13). The front and rear ends of the conveyor belt (10) and the partition plate (11) are slidably attached to the inner wall of the collection box (8).

5. The apparatus for preparing polyester filament nano-antibacterial masterbatch according to claim 1, characterized in that: The collection box (8) has a discharge port (12) at one end away from the guide pipe (7). A guide plate (14) is fixed at the bottom of the discharge port (12). The guide plate (14) is set to be an arc with the same center as the conveyor roller (9) and the partition plate (11) as the radius. The top surface of the guide plate (14) is located below the bottom surface of the conveyor belt (10). The width of the partition plate (11) is greater than the distance between the side end of the discharge port (12) and the conveyor roller (9).

6. The apparatus for preparing polyester filament nano-antibacterial masterbatch according to claim 1, characterized in that: The conveying roller (9) near the end of the guide pipe (7) rotates and extends to the rear of the collection box (8). A reduction gear two (26) is fixed at one end of the conveying roller (9) extending to the rear of the collection box (8). A reduction gear one (25) is meshed above the reduction gear two (26). The reduction gear one (25) is rotatably connected to the rear wall of the collection box (8). A bevel gear two (24) is fixed to the rear side of the reduction gear one (25). A bevel gear one (23) is meshed to the side of the bevel gear two (24). The bevel gear one (23) is rotatably connected to the fixed block (22). The fixed block (22) is fixed to the rear wall of the collection box (8). A pulley two (20) is connected inside the fixed block (22). The pulley two (20) and the pulley one (17) are connected by another belt two (21).

7. The apparatus for preparing polyester filament nano-antibacterial masterbatch according to claim 1, characterized in that: A cooling pipe (16) is sleeved inside the conveyor belt (10) between the two conveyor rollers (9). The cooling pipe (16) is fixedly installed on the inner wall of the collection box (8). A direct cooling refrigerator (15) is installed on the front side wall of the collection box (8). The output end of the direct cooling refrigerator (15) is fixedly connected to the cooling pipe (16). The cooling pipe (16) is set in a serpentine bend.

8. The apparatus for preparing polyester filament nano-antibacterial masterbatch according to claim 3, characterized in that: Supporting slide rods (27) are fixed on the front and rear inner walls of the collection box (8) above the discharge port (13). Each partition plate (11) has a limiting slide groove (28) that cooperates with the supporting slide rod (27) on the front and rear sides away from the end of the conveyor belt (10). The distance between the two ends of the supporting slide rod (27) and the two ends of the straight section of the conveyor belt (10) is equal to the thickness of the partition plate (11).

9. The apparatus for preparing polyester filament nano-antibacterial masterbatch according to claim 6, characterized in that: The diameter of the second bevel gear (24) is greater than that of the first bevel gear (23), and the diameter of the second reduction gear (26) is greater than that of the first reduction gear (25), which are used to reduce the speed of the conveyor roller (9).

10. A method for preparing polyester filament nano-antibacterial masterbatch according to any one of claims 1-9, characterized in that: Includes the following steps: Step (A): Extruder operation for granulation; Step (A1): After mixing the antibacterial agent, dispersant, compatibilizer, graft modifier and excipient resin at high temperature, the mixture is fed into the screw through the hopper. It enters the screw groove by its own weight or under the action of the forced feeder. The mixed material is conveyed and compacted forward by the screw. During the conveying process, the temperature gradually increases. Step (A2): Under the action of heating outside the barrel and strong stirring, mixing and shearing friction between the screw and the barrel surface, the temperature of the mixed material rises to the melting point and begins to melt. The molten mixed material is extruded from the extruder head in a constant pressure, constant temperature and quantitative manner. Step (A3): The extruded polyester nano antibacterial strip enters the discharge sleeve (3). At this time, the drive motor (18) runs and drives the cutting blade to rotate to cut the polyester nano antibacterial strip of the extruder head. The cut polyester nano antibacterial masterbatch falls into the guide pipe (7) through the discharge sleeve (3). Step (B), Collection of antibacterial masterbatch; In step (B1), when the drive motor (18) is running, it drives the pulley (17) on the centrifugal fan (4) to rotate via belt one (19). The pulley (17) drives the impeller inside the centrifugal fan (4) to rotate, blowing the masterbatch into the collection box (8) through the discharge port (13). At the same time, the masterbatch is cooled by air. While the pulley (17) rotates, it drives the pulley (20) to rotate via belt two (21). Step (B2): The rotation of pulley two (20) drives the rotation of bevel gear one (23), the rotation of bevel gear one (23) drives the rotation of its meshing bevel gear two (24), the rotation of bevel gear two (24) drives the rotation of its fixedly connected reduction gear one (25), the rotation of reduction gear one (25) drives the rotation of its meshing reduction gear two (26), the rotation of reduction gear two (26) drives the rotation of conveyor roller (9), and after deceleration, the conveyor roller (9) rotates towards the discharge port (12), thereby causing the conveyor belt (10) to move towards the discharge port (12); Step (B3): The masterbatch that enters the collection box (8) through the discharge port (13) is blown between the two partition plates (11). At the same time, the conveyor belt (10) drives the partition plates (11) to move slowly along the support slide bar (27) inside the collection box (8). When the two partition plates (11) sandwich the masterbatch and move to the point of being misaligned with the discharge port (13), the centrifugal fan (4) loses its air force on the masterbatch. The conveyor belt (10) and the partition plates (11) continue to drive the masterbatch to move. After moving to the discharge port (12), the side partition plate (11) rotates and tilts to discharge the masterbatch. Step (C): When the masterbatch moves inside the collection box (8), the direct cooling refrigeration unit (15) is turned on, so that the direct cooling refrigeration unit (15) runs to cool down the cooling pipe (16), and the masterbatch on the top of the conveyor belt (10) is cooled down through the cooling pipe (16), thereby further cooling down the masterbatch.

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