Special preparation system and method for ultrafine powder mineral filler plastic master batch

Abstract

The invention discloses a special preparation system and method for ultrafine powder mineral filler plastic master batches, and belongs to the technical field of plastic master batch preparation, the special preparation system comprises a mixing cylinder, the mixing cylinder is provided with a feed inlet, the inner wall of the feed inlet is provided with a mounting groove, the inner wall of the mounting groove is provided with a fan, and the fan is connected with the feed inlet. The inner wall of the feeding port is provided with a collecting groove, the collecting groove is communicated with the mounting groove, the inner wall of the mixing barrel is provided with a discharging hole, the discharging hole is communicated with the collecting groove, the collecting groove is internally and rotatably provided with a sealing partition plate, and the sealing partition plate can isolate the collecting groove from the discharging hole. And a rotating mechanism for driving the sealing partition plate to rotate is arranged on the feeding hole. According to the invention, the health risk of operators can be reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of plastic master batch preparation, in particular to a special preparation system and method for super-fine powder mineral filler plastic master batch. BACKGROUND

[0002] Super-fine powder mineral fillers such as talc powder are commonly used in the plastic industry as inexpensive inorganic fillers, which can effectively improve the rigidity, modulus and dimensional stability of the material, and greatly reduce the cost of raw materials.

[0003] The prior art can refer to the Chinese patent with the authorized publication number CN213593330U, which discloses a special preparation for super-fine powder mineral filler plastic master batch, including a base plate, a connecting column fixed at the center of the upper end of the base plate, a connecting plate provided above the base plate, and the connecting plate is fixed on the connecting column at the left end, and a support plate is fixed between the right side of the base plate and the connecting plate, and a control box is fixed on the front end of the left side of the connecting plate through bolts; a mixing cylinder is fixed on the upper end of the connecting plate, and an inclined feed inlet is provided at the top right side of the mixing cylinder; a safety box is fixed at the top end of the connecting column, a rotating machine is fixed at the bottom left side of the safety box, and a connecting belt inside the safety box is connected to the top of the rotating machine; a stirring shaft is installed inside the mixing cylinder, the upper end of the stirring shaft penetrates the upper end of the mixing cylinder through a bearing, and the connecting wheel installed at the top end of the stirring shaft is inside the safety box and is connected by the rotating connection of the connecting belt; a turnover paddle is welded on the stirring shaft, a stirring rod is welded on the inner side of the turnover paddle, and the lower end of the stirring shaft is installed at the bottom inside the mixing cylinder, and a discharging paddle is welded at the lower end of the stirring shaft.

[0004] However, when the operator pours the material into the feed inlet, a large amount of dust may be generated when the material hits the inner wall of the feed inlet, which may be inhaled by the operator, thereby possibly increasing the health risk of the operator. SUMMARY

[0005] In order to facilitate the reduction of the health risk of the operator, on the one hand, the application provides a special preparation system for super-fine powder mineral filler plastic master batch, which adopts the following technical scheme: A special preparation system for super-fine powder mineral filler plastic master batch, comprising a mixing cylinder, a feed inlet is provided on the mixing cylinder, an installation groove is opened in the inner wall of the feed inlet, a fan is installed in the inner wall of the installation groove, a collection groove is opened in the inner wall of the feed inlet, the collection groove is communicated with the installation groove, a discharge hole is opened in the inner wall of the mixing cylinder, the discharge hole is communicated with the collection groove, a sealing partition plate is rotatably arranged in the collection groove, the sealing partition plate can isolate the collection groove from the discharge hole, and a rotating mechanism for driving the sealing partition plate to rotate is arranged on the feed inlet.

[0006] By adopting the above technical solution, when the operator needs to pour materials into the mixing drum through the feed inlet, the fan is started. The suction force of the fan can suck the dust into the collection tank. After the pouring is completed, the sealing baffle can be rotated by the rotating mechanism, which can facilitate the material in the collection tank to enter the mixing drum, reducing the possibility of the operator inhaling dust and thus reducing the health risks of the operator.

[0007] Preferably, the rotating mechanism includes a first rotating shaft, which is rotatably disposed on the inner wall of the collecting tank, a sealing partition is sleeved on the first rotating shaft, the first rotating shaft is fixedly connected to the sealing partition, and a rotating assembly for driving the first rotating shaft to rotate is provided on the feed inlet.

[0008] By adopting the above technical solution, when it is necessary to drive the sealing partition to rotate, the first rotating shaft is first driven to rotate through the rotating assembly, which makes it easier to drive the sealing partition to rotate.

[0009] Preferably, the rotating assembly includes a rotating block rotatably disposed at one end of the first rotating shaft, a torsion spring fixedly connected to the rotating block, the torsion spring being sleeved on the first rotating shaft, the end of the torsion spring away from the rotating block being fixedly connected to the first rotating shaft, and a rotating component for driving the rotating block to rotate is provided on the feed port.

[0010] By adopting the above technical solution, when it is necessary to drive the first rotating shaft to rotate, the rotating component first drives the rotating block to rotate, and the rotating block drives the torsion spring to compress. Under the elastic force of the torsion spring, it is easy to drive the first rotating shaft to rotate.

[0011] Preferably, the rotating component includes a first bevel gear, which is fixedly connected to the rotating block. A linkage rod is rotatably arranged on the feed inlet. A second bevel gear and a third bevel gear are respectively driven to the two ends of the linkage rod. The first bevel gear meshes with the second bevel gear. Two bases are fixedly connected to the feed inlet. A second rotating shaft is rotatably arranged between the two bases. A fourth bevel gear is driven to one end of the second rotating shaft. The third bevel gear meshes with the fourth bevel gear. A rotating component for driving the second rotating shaft to rotate is provided on the feed inlet.

[0012] By adopting the above technical solution, when it is necessary to drive the rotating block to rotate, the second rotating shaft can be driven to rotate by the rotating component, the second rotating shaft can be driven to rotate by the second rotating shaft, the fourth bevel gear can be driven to rotate by the fourth bevel gear, the third bevel gear can be driven to rotate by the third bevel gear, the linkage rod can be driven to rotate by the linkage rod, and the second bevel gear can be driven to rotate by the first bevel gear, thereby facilitating the rotation of the rotating block.

[0013] Preferably, the rotating component includes a sealing cover, which is sleeved on the second rotating shaft, and the second rotating shaft is fixedly connected to the sealing cover.

[0014] By adopting the above technical solution, when it is necessary to drive the second rotating shaft to rotate, the operator can manually drive the sealing cover to close. At this time, the sealing cover drives the second rotating shaft to rotate, which makes it easier to drive the sealing partition to rotate and allow the dust in the collection tank to fall into the mixing drum.

[0015] Preferably, the feed inlet is provided with a fixing component for fixing the sealing partition.

[0016] By adopting the above technical solution, when the mixing drum starts working, the sealing cover is in the closed state. If the sealing baffle is in the open state at this time, the material in the mixing drum may enter the collection tank through the discharge hole. Therefore, the sealing baffle can be fixed by the fixing component, so that when the sealing cover is closed, the sealing baffle is still in the closed state, thereby reducing the possibility of material entering the collection tank.

[0017] Preferably, the fixing component includes a fixing pin, a sliding groove is provided on one side of the feed inlet, the fixing pin is slidably disposed on the inner wall of the sliding groove, a fixing groove is provided on one side of the sealing partition, the fixing pin can be inserted into the inner wall of the fixing groove, and a driving component for driving the fixing pin to move is provided on the fixing pin.

[0018] By adopting the above technical solution, when it is necessary to fix the sealing partition, the sealing partition is first closed. At this time, the fixing pin is aligned with the fixing groove, and then the fixing pin is driven by the driving component to insert into the inner wall of the fixing groove, thereby facilitating the fixing of the sealing partition.

[0019] Preferably, the driving component includes a handle, which is fixedly connected to the fixing pin. A spring is sleeved on the fixing pin, one end of which is fixedly connected to the handle, and the other end of the fixing pin is fixedly connected to the outer wall of the feed port.

[0020] By adopting the above technical solution, when it is necessary to drive the fixing pin to be inserted into the inner wall of the fixing groove, the operator can manually drive the handle to move. At this time, the handle drives the fixing pin to move, and the spring is in a stretched state. When the fixing pin is aligned with the inner wall of the fixing groove, the handle is released, and the fixing pin is inserted into the inner wall of the fixing groove under the elastic force of the spring.

[0021] This application provides a method for preparing a special preparation system for ultrafine powder mineral filler plastic masterbatch, which adopts the following technical solution: S1: Prepare 20-80 parts by weight of ultrafine mineral filler, 10-70 parts by weight of whisker material, and 8-40 parts by weight of carrier resin. S2: Dry the ultrafine powder mineral filler at 80-100℃ for 2-4 hours to remove moisture; S3: Open the sealing cover and start the fan. Pour the ultrafine powder mineral filler and all the carrier resin into the mixing drum through the feed inlet. At this time, the splashing dust is sucked into the collection tank by the fan on the inner wall of the feed inlet. Then close the sealing cover and manually drive the fixing pin to separate from the fixing tank by the handle. At this time, the sealing partition rotates under the elastic force of the torsion spring, which makes it easier for the dust in the collection tank to fall into the mixing drum. Then open the sealing cover again. At this time, the sealing partition changes from open to closed. The operator fixes the sealing partition with the fixing component and then closes the sealing cover. At this time, the sealing partition is still in the closed state due to the fixing effect of the fixing component. S4: Start the rotating machine to drive the stirring shaft to rotate via the connecting belt and connecting wheel. The speed should be controlled at 200-600 rpm, and the mixing time should be 5-15 minutes. S5: Open the sealing plate of the discharge port, and the material is guided into the conveyor cylinder by the discharge paddle. Start the motor to drive the conveyor shaft to output the material. S6: The material output from the conveyor cylinder is melted and extruded through a twin-screw extruder at a temperature of 175-245℃, and then granulated by hot cutting of the die surface to obtain the finished plastic masterbatch.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. When the operator needs to pour materials into the mixing drum through the feed inlet, the blower is started. The suction force of the blower can suck the dust into the collection tank. After the pouring is finished, the sealing baffle can be rotated by the rotating mechanism, which can facilitate the material in the collection tank to enter the mixing drum, reducing the possibility of the operator inhaling dust and thus reducing the health risks of the operator. 2. When it is necessary to drive the rotating block to rotate, the second rotating shaft can be driven to rotate by the rotating component, the second rotating shaft can drive the fourth bevel gear to rotate, the fourth bevel gear can drive the third bevel gear to rotate, the third bevel gear can drive the linkage rod to rotate, the linkage rod can drive the second bevel gear to rotate, and the second bevel gear can drive the first bevel gear to rotate, thereby facilitating the rotation of the rotating block; 3. When the mixing drum starts working, the sealing cover is in the closed state. If the sealing baffle is in the open state at this time, the material in the mixing drum may enter the collection tank through the discharge hole. Therefore, the sealing baffle can be fixed by the fixing component so that the sealing baffle is still in the closed state when the sealing cover is closed, thereby reducing the possibility of material entering the collection tank. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view showing the fixing component in this invention; Figure 3 yes Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is a cross-sectional view showing the rotating mechanism in this invention; Figure 5 yes Figure 4 A magnified view of a portion of point A in the middle.

[0024] Explanation of reference numerals in the attached drawings: 1. Mixing cylinder; 11. Feed inlet; 12. Mounting groove; 13. Fan; 14. Collection groove; 15. Discharge hole; 16. Sealing partition; 2. Rotating mechanism; 211. First rotating shaft; 22. Rotating assembly; 221. Rotating block; 222. Torsion spring; 23. Rotating component; 231. First bevel gear; 232. Linkage rod; 233. Second bevel gear; 234. Third bevel gear; 235. Fourth bevel gear; 236. Base; 237. Second rotating shaft; 24. Rotating component; 241. Sealing cover; 3. Fixing assembly; 311. Fixing pin; 312. Sliding groove; 313. Fixing groove; 32. Driving component; 321. Handle; 322. Spring. Detailed Implementation

[0025] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0026] This invention discloses a dedicated preparation system for ultrafine powder mineral filler plastic masterbatch, such as... Figure 1 and Figure 2 As shown, the system includes a mixing cylinder 1, which is cylindrical in shape. A square inlet 11 is provided on the mixing cylinder 1. An installation groove 12 is formed on the inner wall of the inlet 11. The installation groove 12 has a circular cross-section and extends horizontally. A fan 13 is installed on the inner wall of the installation groove 12. A collection trough 14 is formed on the inner wall of the inlet 11. When the fan 13 is started, the airflow direction of the fan 13 is horizontally directed towards the collection trough 14. The collection trough 14 has a square cross-section and extends vertically... Extending in a straight direction, the collection tank 14 is connected to the installation tank 12. The inner wall of the mixing cylinder 1 is provided with a discharge hole 15. The cross-section of the discharge hole 15 is square and extends in a vertical direction. The discharge hole 15 is connected to the collection tank 14. A sealing partition 16 is rotatably arranged inside the collection tank 14. The cross-section of the sealing partition 16 is square. The sealing partition 16 can isolate the collection tank 14 from the discharge hole 15. A rotating mechanism 2 for driving the sealing partition 16 to rotate is provided on the inlet 11.

[0027] When the operator needs to pour materials into the mixing drum 1 through the feed inlet 11, the blower 13 is started. The suction of the blower 13 can draw the dust into the collection tank 14. After the pouring is finished, the sealing partition 16 can be driven to rotate by the rotating mechanism 2, so that the material in the collection tank 14 can enter the mixing drum 1, reducing the possibility of the operator inhaling dust and thus reducing the health risks of the operator.

[0028] like Figure 2 and Figure 3 As shown, the rotating mechanism 2 includes a first rotating shaft 211, which has a circular cross-section and is arranged horizontally. The first rotating shaft 211 is rotatably mounted on the inner wall of the collecting tank 14 via bearings. A sealing partition 16 is sleeved on the outer wall of the first rotating shaft 211, and the first rotating shaft 211 is fixedly connected to the sealing partition 16. A rotating assembly 22 for driving the first rotating shaft 211 to rotate is provided on the feed inlet 11. When it is necessary to drive the sealing partition 16 to rotate, the first rotating shaft 211 is first driven to rotate via the rotating assembly 22, thereby facilitating the rotation of the sealing partition 16.

[0029] like Figure 4 and Figure 5 As shown, the rotating assembly 22 includes a rotating block 221 with a circular cross-section. The rotating block 221 is rotatably mounted on one end of a first rotating shaft 211, which passes through the inner wall of the feed inlet 11. A torsion spring 222 is fixedly connected to the rotating block 221. The torsion spring 222 is arranged along the axial direction of the first rotating shaft 211 and is sleeved on the first rotating shaft 211. The end of the torsion spring 222 away from the rotating block 221 is fixedly connected to the first rotating shaft 211. A rotating component 23 for driving the rotating block 221 to rotate is provided on the feed inlet 11.

[0030] When it is necessary to drive the first rotating shaft 211 to rotate, the rotating component 23 drives the rotating block 221 to rotate. The rotating block 221 drives the torsion spring 222 to compress. Under the elastic force of the torsion spring 222, it is easy to drive the first rotating shaft 211 to rotate.

[0031] like Figure 4 and Figure 5As shown, the rotating component 23 includes a first bevel gear 231, which is axially arranged along the first rotating shaft 211. The first bevel gear 231 is fixedly connected to the rotating block 221, and the rotating block 221 is coaxially connected to the first bevel gear 231. A linkage rod 232 is rotatably arranged on the side of the feed inlet 11 via two mounting blocks. The linkage rod 232 has a circular cross-section and is arranged vertically. A second bevel gear 233 and a third bevel gear 234 are respectively connected to the two ends of the linkage rod 232. The second bevel gear 233 is located at the bottom end of the linkage rod 232. The third bevel gear 234 is located at the top of the linkage rod 232. The first bevel gear 231 meshes with the second bevel gear 233. Two bases 236 are fixedly connected to the feed inlet 11. A second rotating shaft 237 is rotatably arranged between the two bases 236. The cross-section of the second rotating shaft 237 is circular. The second rotating shaft 237 is arranged in the horizontal direction. A fourth bevel gear 235 is connected to one end of the second rotating shaft 237. The third bevel gear 234 meshes with the fourth bevel gear 235. A rotating component 24 for driving the second rotating shaft 237 to rotate is provided on the feed inlet 11.

[0032] When it is necessary to drive the rotating block 221 to rotate, the second rotating shaft 237 can be driven to rotate by the rotating component 24. The second rotating shaft 237 drives the fourth bevel gear 235 to rotate, the fourth bevel gear 235 drives the third bevel gear 234 to rotate, the third bevel gear 234 drives the linkage rod 232 to rotate, the linkage rod 232 drives the second bevel gear 233 to rotate, and the second bevel gear 233 drives the first bevel gear 231 to rotate, thereby facilitating the rotation of the rotating block 221.

[0033] like Figure 4 As shown, the rotating component 24 includes a sealing cover 241, which is square in shape and is fitted onto the outer wall of the second rotating shaft 237. The second rotating shaft 237 is fixedly connected to the sealing cover 241. When it is necessary to drive the second rotating shaft 237 to rotate, the operator can manually drive the sealing cover 241 to close. At this time, the sealing cover 241 drives the second rotating shaft 237 to rotate, thereby facilitating the rotation of the sealing partition 16 and allowing the dust in the collection tank 14 to fall into the mixing cylinder 1.

[0034] like Figure 2 and Figure 3 As shown, a fixing component 3 for fixing the sealing partition 16 is provided on the feed inlet 11. When the mixing drum 1 starts working, the sealing cover 241 is in the closed state. If the sealing partition 16 is in the open state at this time, the material in the mixing drum 1 may enter the collection tank 14 through the discharge hole 15. Therefore, the sealing partition 16 can be fixed by the fixing component 3, so that when the sealing cover 241 is closed, the sealing partition 16 is still in the closed state, thereby reducing the possibility of material entering the collection tank 14.

[0035] like Figure 2 and Figure 3 As shown, the fixing component 3 includes a fixing pin 311 with a circular cross-section, which is horizontally oriented. A sliding groove 312 with a circular cross-section extends horizontally on one side of the feed inlet 11. The fixing pin 311 slides horizontally against the inner wall of the sliding groove 312. A fixing groove 313 with a circular cross-section extends axially along the fixing pin 311, allowing the fixing pin 311 to be inserted into the inner wall of the fixing groove 313. A driving component 32 is provided on the fixing pin 311 to drive it to move horizontally. When the sealing partition 16 needs to be fixed, the sealing partition 16 is first closed. The fixing pin 311 is then aligned with the fixing groove 313, and the driving component 32 drives the fixing pin 311 to insert into the inner wall of the fixing groove 313, thus facilitating the fixing of the sealing partition 16.

[0036] like Figure 2 and Figure 3 As shown, the drive component 32 includes a handle 321, which is square in shape. The handle 321 is fixedly connected to one end of the fixing pin 311. A spring 322 is sleeved on the fixing pin 311. The spring 322 is arranged along the axial direction of the fixing pin 311. One end of the spring 322 is fixedly connected to the handle 321, and the other end of the fixing pin 311 is fixedly connected to the outer wall of the feed port 11.

[0037] When it is necessary to drive the fixing pin 311 to be inserted into the inner wall of the fixing groove 313, the operator can manually drive the handle 321 to move. At this time, the handle 321 drives the fixing pin 311 to move, and the spring 322 is in a stretched state. When the fixing pin 311 is aligned with the inner wall of the fixing groove 313, the handle 321 is released, and the fixing pin 311 is inserted into the inner wall of the fixing groove 313 under the elastic force of the spring 322.

[0038] This invention also discloses a method for preparing a special preparation system for ultrafine powder mineral filler plastic masterbatch, comprising the following steps: S1: Prepare 20-80 parts by weight of ultrafine mineral filler, 10-70 parts by weight of whisker material, and 8-40 parts by weight of carrier resin. S2: Dry the ultrafine powder mineral filler at 80-100℃ for 2-4 hours to remove moisture; S3: Open the sealing cover 241 and start the fan 13 to pour the ultrafine powder mineral filler and all the carrier resin into the mixing cylinder 1 through the feed port 11. At this time, the splashing dust is sucked into the collection tank 14 through the fan 13 on the inner wall of the feed port 11. Then close the sealing cover 241 and manually drive the fixing pin 311 to separate from the fixing tank 313 through the handle 321. At this time, the sealing partition 16 rotates under the elastic force of the torsion spring 222, so that the dust in the collection tank 14 can fall into the mixing cylinder 1. Then open the sealing cover 241 again. At this time, the sealing partition 16 changes from open to closed. The operator fixes the sealing partition 16 through the fixing component 3. Then close the sealing cover 241 again. At this time, the sealing partition 16 is still in the closed state due to the fixing effect of the fixing component 3. S4: Start the rotating machine to drive the stirring shaft to rotate via the connecting belt and connecting wheel. The speed should be controlled at 200-600 rpm, and the mixing time should be 5-15 minutes. S5: Open the sealing plate of the discharge port, and the material is guided into the conveyor cylinder by the discharge paddle. Start the motor to drive the conveyor shaft to output the material. S6: The material output from the conveyor cylinder is melted and extruded through a twin-screw extruder at a temperature of 175-245℃, and then granulated by hot cutting of the die surface to obtain the finished plastic masterbatch.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A special preparation system for ultrafine powder mineral filler plastic masterbatch, comprising a mixing cylinder (1), wherein the mixing cylinder (1) is provided with a feed inlet (11), characterized in that: The inner wall of the feed inlet (11) is provided with an installation groove (12), and a fan (13) is installed on the inner wall of the installation groove (12). The inner wall of the feed inlet (11) is provided with a collection groove (14), which is connected to the installation groove (12). The inner wall of the mixing cylinder (1) is provided with a discharge hole (15), which is connected to the collection groove (14). A sealing partition (16) is rotatably arranged inside the collection groove (14), which can isolate the collection groove (14) from the discharge hole (15). The feed inlet (11) is provided with a rotating mechanism (2) for driving the sealing partition (16) to rotate.

2. The special preparation system for ultrafine powder mineral filler plastic masterbatch according to claim 1, characterized in that: The rotating mechanism (2) includes a first rotating shaft (211), which is rotatably disposed on the inner wall of the collecting groove (14). The sealing partition (16) is sleeved on the first rotating shaft (211), and the first rotating shaft (211) is fixedly connected to the sealing partition (16). The feed inlet (11) is provided with a rotating assembly (22) for driving the first rotating shaft (211) to rotate.

3. The special preparation system for ultrafine powder mineral filler plastic masterbatch according to claim 2, characterized in that: The rotating assembly (22) includes a rotating block (221), which is rotatably disposed at one end of the first rotating shaft (211). A torsion spring (222) is fixedly connected to the rotating block (221), which is sleeved on the first rotating shaft (211). The end of the torsion spring (222) away from the rotating block (221) is fixedly connected to the first rotating shaft (211). A rotating component (23) for driving the rotating block (221) to rotate is provided on the feed port (11).

4. The special preparation system for ultrafine powder mineral filler plastic masterbatch according to claim 3, characterized in that: The rotating component (23) includes a first bevel gear (231), which is fixedly connected to the rotating block (221). A linkage rod (232) is rotatably provided on the feed inlet (11). A second bevel gear (233) and a third bevel gear (234) are respectively connected to the two ends of the linkage rod (232). The first bevel gear (231) meshes with the second bevel gear (233). Two bases (236) are fixedly connected to the feed inlet (11). A second rotating shaft (237) is rotatably provided between the two bases (236). A fourth bevel gear (235) is connected to one end of the second rotating shaft (237). The third bevel gear (234) meshes with the fourth bevel gear (235). A rotating component (24) for driving the second rotating shaft (237) to rotate is provided on the feed inlet (11).

5. The special preparation system for ultrafine powder mineral filler plastic masterbatch according to claim 4, characterized in that: The rotating component (24) includes a sealing cover (241), which is sleeved on the second rotating shaft (237), and the second rotating shaft (237) is fixedly connected to the sealing cover (241).

6. The special preparation system for ultrafine powder mineral filler plastic masterbatch according to claim 5, characterized in that: The feed inlet (11) is provided with a fixing component (3) for fixing the sealing partition (16).

7. The special preparation system for ultrafine powder mineral filler plastic masterbatch according to claim 6, characterized in that: The fixing component (3) includes a fixing pin (311), a sliding groove (312) is provided on one side of the feed port (11), the fixing pin (311) is slidably disposed on the inner wall of the sliding groove (312), a fixing groove (313) is provided on one side of the sealing partition (16), the fixing pin (311) can be inserted into the inner wall of the fixing groove (313), and a driving component (32) for driving the fixing pin (311) to move is provided on the fixing pin (311).

8. The special preparation system for ultrafine powder mineral filler plastic masterbatch according to claim 7, characterized in that: The drive component (32) includes a handle (321), which is fixedly connected to the fixing pin (311). A spring (322) is sleeved on the fixing pin (311), one end of which is fixedly connected to the handle (321), and the other end of which is fixedly connected to the outer wall of the feed port (11).

9. A method for preparing a special preparation system for ultrafine powder mineral filler plastic masterbatch as described in any one of claims 1-8, characterized in that: The preparation steps include the following: S1: Prepare 20-80 parts by weight of ultrafine mineral filler, 10-70 parts by weight of whisker material, and 8-40 parts by weight of carrier resin. S2: Dry the ultrafine powder mineral filler at 80-100℃ for 2-4 hours to remove moisture; S3: Open the sealing cover (241) and start the fan (13). Pour the ultrafine powder mineral filler and all the carrier resin into the mixing drum (1) through the feed port (11). At this time, the splashed dust is sucked into the collection tank (14) through the fan (13) on the inner wall of the feed port (11). Then close the sealing cover (241) and manually drive the fixing pin (311) to separate from the fixing tank (313) through the handle (321). At this time, the sealing partition (16) rotates under the elastic force of the torsion spring (222), so that the dust in the collection tank (14) can fall into the mixing drum (1). Then open the sealing cover (241) again. At this time, the sealing partition (16) changes from open to closed. The operator fixes the sealing partition (16) through the fixing component (3). Then close the sealing cover (241). At this time, the sealing partition (16) is still in the closed state due to the fixing effect of the fixing component (3). S4: Start the rotating machine to drive the stirring shaft to rotate via the connecting belt and connecting wheel. The speed should be controlled at 200-600 rpm, and the mixing time should be 5-15 minutes. S5: Open the sealing plate of the discharge port, and the material is guided into the conveyor cylinder by the discharge paddle. Start the motor to drive the conveyor shaft to output the material. S6: The material output from the conveyor cylinder is melted and extruded through a twin-screw extruder at a temperature of 175-245℃, and then granulated by hot cutting of the die surface to obtain the finished plastic masterbatch.

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