A preparation device and preparation method of masterbatch

Abstract

The invention relates to the technical field of masterbatch preparation, and in particular to a masterbatch preparation device and a preparation method thereof, comprising a mixing barrel with a sloped bottom edge, a feeding assembly being arranged at the upper end of the mixing barrel, a feeding pipe being arranged at the lower end of the feeding assembly, the lower end of the feeding pipe extending into the interior of the mixing barrel, a dust removal assembly being arranged in the middle of the feeding pipe, and a mixing assembly being symmetrically arranged at the lower end of the outer wall of the feeding pipe. By arranging an intermittent quantitative feeding structure in a closed mixing barrel, not only sufficient stirring is ensured, but also adjustment can be made according to production requirements. With a stirring structure capable of revolution and rotation, the purpose of uniformly mixing a carrier, an auxiliary powder and a self-dispersing pigment is achieved. At the same time, the generated dust and the mixed powder adhered to the inner wall of the closed mixing barrel can be scraped off and stirred again, thereby ensuring the standardization of the chromaticity of the masterbatch and improving its preparation quality.

Description

Technical Field

[0001] The invention relates to the technical field of masterbatch preparation, in particular to a masterbatch preparation device and a preparation method thereof. Background Art

[0002] Masterbatch is a new type of colorant for polymer materials. It is usually composed of carriers, auxiliary powders and self-dispersible pigments. It is a general term for aggregate particles obtained by uniformly attaching a constant amount of pigments or dyes to resins. There are two main preparation processes for masterbatches: dry method and wet method. Among them, dry method is the most widely used preparation process. In the early stage of dry method preparation of masterbatches, it is usually necessary to mix the carrier, auxiliary powder and self-dispersible pigments evenly, and then use an extruder to granulate to obtain the finished masterbatch particles.

[0003] At present, in the early stage of preparing masterbatch by dry method, the required carrier, auxiliary powder and self-dispersing pigment are usually added into the mechanical stirring equipment at one time, and then the carrier, auxiliary powder and self-dispersing pigment are evenly mixed by high-speed rotation. During the mixing process, a large amount of dust will be generated in the stirring equipment. The existing mechanical stirring equipment lacks a cleaning structure, which causes the dust to adhere to the top and inner wall of the stirring equipment, which not only reduces the preparation amount of the mixed powder, but also affects the mixing chromaticity of the next mixed powder, thereby causing a certain color difference between the final masterbatch and the actual requirement, and the quality of the masterbatch preparation cannot be guaranteed. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a device for preparing a masterbatch and a method for preparing the same. By arranging an intermittent quantitative feeding structure in a closed mixing barrel, not only is sufficient stirring ensured, but it can also be adjusted according to production needs. In combination with a stirring structure capable of revolution and rotation, uniform mixing of a carrier, an auxiliary powder and a self-dispersing pigment is achieved. At the same time, the generated dust and the mixed powder adhered to the inner wall of the closed mixing barrel can be scraped off and stirred again, thereby ensuring the standardization of the chromaticity of the masterbatch and improving its preparation quality.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a masterbatch preparation device, comprising a mixing barrel with a sloped bottom edge, a feeding assembly is arranged at the upper end of the mixing barrel, a feeding pipe is arranged at the lower end of the feeding assembly, the lower end of the feeding pipe extends to the inside of the mixing barrel, a dust removal assembly is arranged in the middle of the feeding pipe, and a mixing assembly is symmetrically arranged at the lower end of the outer wall of the feeding pipe;

[0006] The dust removal assembly comprises a threaded section, a threaded section is provided in the middle of the discharge pipe, a lifting ring is screwed on the outer side of the threaded section, a limiting rod is symmetrically installed in the middle of the outer wall of the lifting ring, a limiting groove is provided on the inner wall of the mixing barrel corresponding to the limiting rod, the end of the limiting rod away from the lifting ring is slidably arranged in the limiting groove, an I-type slide cylinder is gap-matched on the discharge pipe below the lifting ring, a linkage rod is symmetrically installed at the lower end of the lifting ring, the lower end of the linkage rod is fixedly connected to the upper end of the I-type slide cylinder, a dust removal net is sleeved on the I-type slide cylinder, the outer edge of the dust removal net is slidably matched with the inner wall of the mixing barrel, a support spring is sleeved on the I-type slide cylinder and at a position below the dust removal net, an L-shaped connecting rod is symmetrically installed on the discharge pipe below the I-shaped slide cylinder, and a scraper is fixedly installed on the end of the L-shaped connecting rod away from the discharge pipe;

[0007] A driving unit is installed on the upper end of the mixing barrel, and the driving unit includes a reciprocating motor. The reciprocating motor is fixedly installed on the upper end of the mixing barrel through a machine base, and a driving shaft is installed on the output shaft of the reciprocating motor. A driving pulley is fixedly provided near the lower end of the driving shaft, and a driven pulley is fixedly provided on the discharge pipe corresponding to the driving pulley. The driving pulley is connected to the driven pulley through an annular belt.

[0008] Preferably, a material guide column is fixedly arranged in the middle of the bottom of the mixing barrel, and an outer serration is arranged on the outer side wall of the lower half of the material guide column.

[0009] Preferably, a bridge-shaped material guiding channel is provided in the middle of the upper end of the material guiding column.

[0010] Preferably, the material discharge assembly includes a material holding barrel, a material holding barrel is arranged above the mixing barrel, an end cover is installed on the upper end of the material holding barrel, the material holding barrel is fixedly connected to the side wall of the mixing barrel through a No. 1 fixing frame, a transition material pipe is connected to the lower end of the material holding barrel, the transition material pipe is fixedly connected to the side wall of the mixing barrel through a No. 2 fixing frame, a cavity is arranged in the middle of the transition material pipe, a material distributor is arranged in the cavity, and the upper end of the driving unit is fixedly connected to the material distributor.

[0011] Preferably, the upper end of the drive shaft extends into the cavity and is fixedly connected to the distributor.

[0012] Preferably, a sealing plate is hinged on one side of the lower end of the discharge pipe, and a return spring is installed between the middle part of the upper end of the sealing plate and the inner wall of the discharge pipe.

[0013] Preferably, the upper side of the scraper is a concave arc structure.

[0014] Preferably, the mixing assembly includes an L-shaped telescopic rod, which is symmetrically installed on the lower end of the outer side wall of the discharge tube, and the lower end of the L-shaped telescopic rod is rotatably connected to a mixing disk, and a gear ring is fixedly installed on the side wall of the mixing disk, and the gear ring and the external tooth pattern are meshed with each other. Mixing rods are evenly arranged on the lower end surface of the mixing disk, and a support rod is fixedly connected to the middle part of the sub-rod of the L-shaped telescopic rod, and a rubber scraper is fixedly installed on the end of the support rod away from the sub-rod, and the rubber scraper is in contact with the inner wall of the mixing barrel.

[0015] Preferably, the support rod is made of rubber material and the length of the support rod is equal to the radius of the mixing plate.

[0016] Preferably, the preparation method of the masterbatch preparation device comprises the following steps:

[0017] S1. First, manually add the carrier, auxiliary powder and self-dispersible pigment into the material container, and then cover the end cover;

[0018] S2, start the driving unit, and drive the distributor to rotate at a constant speed through the driving unit, so as to realize intermittent continuous feeding, and the carrier, auxiliary powder and self-dispersible pigment will fall into the mixing barrel through the feeding pipe, and the mixing component can mix the carrier, auxiliary powder and self-dispersible pigment evenly at this time;

[0019] S3. During the mixing process, the dust removal component can collect the generated dust and make it fall to the bottom of the mixing barrel for re-mixing. At the same time, the rubber scraper will scrape off the dust adhering to the inner wall of the mixing barrel.

[0020] Beneficial effects of the present invention:

[0021] 1. By setting an intermittent quantitative feeding component at the upper end of the closed mixing cylinder, it can be adjusted according to production needs, and this method can ensure sufficient stirring. With the mixing component that can revolve and rotate, the purpose of uniform mixing of carriers, auxiliary powders and self-dispersible pigments is achieved, the uniformity of the mixed powder is ensured, and then the color standard of the masterbatch is ensured, and its preparation quality is improved;

[0022] 2. The dust removal component can capture the dust generated during the mixing process through the up and down reciprocating motion of the dust removal net, and can clean the dust removal net through the scraper, and at the same time scrape the adhered dust to the bottom of the mixing barrel for further mixing. With the cooperation of the rubber scraper, the dust adhered to the inner wall of the mixing barrel can be further scraped off. The two complement each other, not only ensuring the accuracy of the mixed powder preparation volume, but also avoiding the color mixing problem when preparing two consecutive mixed powders of different colors, further ensuring the standardization of the masterbatch chromaticity and its preparation quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure after removing part of the side wall of the transition material pipe in the present invention;

[0026] Figure 3 The present invention Figure 2 A schematic diagram of the enlarged structure at point A;

[0027] Figure 4 It is a schematic diagram of the three-dimensional structure after removing part of the side wall of the mixing cylinder in the present invention;

[0028] Figure 5 The present invention Figure 4 A schematic diagram of the enlarged structure at B;

[0029] Figure 6 It is a schematic diagram of the three-dimensional connection structure between the feeding pipe, the dust removal component and the mixing component in the present invention;

[0030] Figure 7 The present invention Figure 6 A schematic diagram of a three-dimensional connection structure viewed from above;

[0031] Figure 8 It is a schematic diagram of the three-dimensional connection structure between the feed pipe, the L-shaped connecting rod and the scraper in the present invention;

[0032] Fig. 9 It is a schematic diagram of the three-dimensional connection structure between the feed tube, the sealing plate and the return spring in the present invention.

[0033] In the figure:

[0034] 1. Mixing barrel; 11. Material guide column; 12. External tooth pattern;

[0035] 2. Material unloading assembly; 21. Material holding barrel; 22. End cover; 23. No. 1 fixed frame; 24. Transition material pipe; 25. No. 2 fixed frame; 26. Material distributor; 27. Driving unit; 271. Reciprocating motor; 272. Driving shaft; 273. Driving pulley; 274. Annular belt; 275. Driven pulley;

[0036] 3. Feeding pipe; 31. Sealing plate; 32. Return spring;

[0037] 4. Dust removal assembly; 41. Threaded section; 42. Lifting ring; 43. Limit rod; 44. I-type slide cylinder; 45. Linkage rod; 46. Dust removal net; 47. Support spring; 48. L-type connecting rod; 49. Scraper;

[0038] 5. Mixing assembly; 51. L-shaped telescopic rod; 52. Mixing plate; 53. Gear ring; 54. Mixing rod; 55. Support rod; 56. Rubber scraper. DETAILED DESCRIPTION

[0039] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0040] Example 1: See Figures 1 to 9 A preparation device for masterbatch comprises a mixing barrel 1 with a sloped bottom edge, a feeding assembly 2 is arranged at the upper end of the mixing barrel 1, a feeding pipe 3 is installed at the lower end of the feeding assembly 2, the lower end of the feeding pipe 3 extends to the inside of the mixing barrel 1, and a dust removal assembly 4 is installed in the middle of the feeding pipe 3.

[0041] A material guide column 11 is fixedly arranged in the middle of the bottom of the mixing barrel 1, and an outer tooth pattern 12 is arranged on the outer side wall of the lower half of the material guide column 11. A bridge-shaped material guide channel is opened in the middle of the upper end of the material guide column 11.

[0042] The feeding assembly 2 includes a material holding barrel 21, which is arranged above the mixing barrel 1, and an end cover 22 is installed on the upper end of the material holding barrel 21. The material holding barrel 21 is fixedly connected to the side wall of the mixing barrel 1 through a No. 1 fixing frame 23, and the lower end of the material holding barrel 21 is connected to a transition material pipe 24, and the transition material pipe 24 is fixedly connected to the side wall of the mixing barrel 1 through a No. 2 fixing frame 25. A cavity is arranged in the middle of the transition material pipe 24, and a distributor 26 is arranged in the cavity. A driving unit 27 is installed on the upper end of the mixing barrel 1, and the upper end of the driving unit 27 is fixedly connected to the distributor 26.

[0043] The driving unit 27 includes a reciprocating motor 271, and the reciprocating motor 271 is fixedly installed on the upper end of the mixing barrel 1 through a machine base. A driving shaft 272 is installed on the output shaft of the reciprocating motor 271. The upper end of the driving shaft 272 extends into the interior of the cavity and is fixedly connected to the distributor 26. A driving pulley 273 is fixedly provided near the lower end of the driving shaft 272, and a driven pulley 275 is fixedly provided on the discharge pipe 3 corresponding to the driving pulley 273. The driving pulley 273 is connected to the driven pulley 275 through an annular belt 274.

[0044] A sealing plate 31 is hinged on one side of the lower end of the feeding tube 3 , and a return spring 32 is installed between the middle part of the upper end of the sealing plate 31 and the inner side wall of the feeding tube 3 .

[0045] The dust removal assembly 4 includes a threaded section 41, a threaded section 41 is provided in the middle of the feed tube 3, a lifting ring 42 is screwed on the outer side of the threaded section 41, a limiting rod 43 is symmetrically installed in the middle of the outer wall of the lifting ring 42, a limiting groove is provided on the inner wall of the mixing barrel 1 corresponding to the limiting rod 43, and the end of the limiting rod 43 away from the lifting ring 42 is slidably arranged in the limiting groove, and a profiled slide 44 is provided on the feed tube 3 below the lifting ring 42, and a linkage rod 45 is symmetrically installed at the lower end of the lifting ring 42 The lower end of the linkage rod 45 is fixedly connected to the upper end of the I-type slide 44, and a dust removal net 46 is sleeved on the I-type slide 44. The outer edge of the dust removal net 46 slides with the inner wall of the mixing barrel 1. A support spring 47 is sleeved on the I-type slide 44 and below the dust removal net 46. An L-shaped connecting rod 48 is symmetrically installed on the discharge pipe 3 below the I-type slide 44. A scraper 49 is fixedly installed at the end of the L-shaped connecting rod 48 away from the discharge pipe 3, and the upper end side of the scraper 49 is a concave arc structure.

[0046] In specific operation, the carrier, auxiliary powder and self-dispersible pigment are first added into the material barrel 21 manually, and then the end cover 22 is covered, and the reciprocating motor 271 is started. The reciprocating motor 271 drives the driving shaft 272 to rotate back and forth at a uniform speed, thereby driving the distributor 26 to rotate back and forth at a uniform speed. When the leakage groove on the distributor 26 rotates to the main drop channel of the transition pipe 24, the mixed powder inside the material barrel 21 will fall down through the leakage groove. Since the rotation speed of the distributor 26 is uniform, the mixed powder will fall down in a single time. The amount of mixed powder is the same, so as to achieve the effect of intermittent quantitative feeding, and then the mixed powder will fall into the bridge-type material guide channel at the upper end of the guide column 11 through the feeding tube 3, and then the mixed powder will be guided to both sides by the bridge-type material guide channel and transported to the bottom of the mixing barrel 1. The reset spring 32 arranged at the lower end of the feeding tube 3 can make the sealing plate 31 open downward during each feeding process. After the feeding is completed, the sealing plate 31 is reset to close the lower end of the feeding tube 3 to ensure the sealing of the mixing barrel 1, and finally the mixing component 5 is used for uniform mixing.

[0047] In the process of uniformly mixing the carrier, auxiliary powder and self-dispersible pigment, a large amount of dust will be generated inside the mixing barrel 1, and the driving shaft 272 will drive the active pulley 273 to reciprocate during the rotation process. Under the action of the annular belt 274, the driven pulley 275, the discharge pipe 3 and the threaded section 41 will also reciprocate. Under the action of the limit rod 43, the lifting ring 42 will reciprocate up and down along the threaded section 41. When the lifting ring 42 moves downward, the lifting ring 42 will drive the linkage rod 45, the I-shaped slide 44, the dust removal net 46 and the support spring 47 to move downward, thereby capturing the dust inside the mixing barrel 1 through the dust removal net 46. As the amount of dust on the dust removal net 46 increases, the dust removal net 46 will move downward. As the weight of the dust on the dust removal net 46 increases, its gravity will gradually increase. When the gravity of the dust on the dust removal net 46 is greater than the elastic force of the support spring 47, the dust removal net 46 and the dust will compress the support spring 47 by a certain distance. When the dust removal net 46 moves downward to a distance close to the maximum distance next time, the lower surface of the dust removal net 46 will contact the upper end of the scraper 49, and the rotation of the discharge pipe 3 will also drive the L-shaped connecting rod 48 and the scraper 49 to rotate. After the dust removal net 46 and the scraper 49 are in contact, the scraper 49 can scrape off the dust adhered to the lower surface of the dust removal net 46 and slide it along the concave arc structure at the upper end of the scraper 49 to the bottom of the mixing barrel 1 to be stirred again. In this way, the effect of cleaning the dust removal net 46 can be achieved.

[0048] Embodiment 2: The technical solution is basically the same as that of Embodiment 1, see Figure 4 , Figure 6 and Figure 7 , the difference is that: a mixing assembly 5 is symmetrically arranged at the lower end of the outer wall of the feeding tube 3, and the mixing assembly 5 includes an L-shaped telescopic rod 51, and the L-shaped telescopic rod 51 is symmetrically installed at the lower end of the outer wall of the feeding tube 3, and the lower end of the L-shaped telescopic rod 51 is rotatably connected to a mixing disk 52, and a gear ring 53 is fixedly installed on the side wall of the mixing disk 52, and the gear ring 53 and the outer tooth pattern 12 are meshed with each other, and mixing rods 54 are evenly arranged on the lower end surface of the mixing disk 52, and a support rod 55 is fixedly connected to the middle part of the sub-rod of the L-shaped telescopic rod 51, and a rubber scraper 56 is fixedly installed at the end of the support rod 55 away from the sub-rod, and the rubber scraper 56 is in contact with the inner wall of the mixing barrel 1, and the support rod 55 is made of rubber material and the length of the support rod 55 is equal to the radius of the mixing disk 52.

[0049] In specific operation, when the mixed powder falls to the bottom of the mixing barrel 1, the discharge pipe 3 will drive the L-shaped telescopic rod 51, the mixing plate 52, the gear ring 53 and the mixing rod 54 to reciprocate around the central axis of the guide column 11. At the same time, under the meshing action of the gear ring 53 and the outer tooth pattern 12, the mixing plate 52 and the mixing rod 54 can rotate around the central axis of the gear ring 53. The two rotation forms cooperate with each other to mix the mixed powder evenly. As the mixed powder at the bottom of the mixing barrel 1 continues to increase, the extrusion force of the mixed powder on the mixing plate 52 can drive the L-shaped telescopic rod 51 is adaptively compressed, and the mixing disk 52, the gear ring 53 and the mixing rod 54 are also adaptively moved upward, so as to achieve the purpose of uniformly stirring the mixed powders of different volumes. The L-shaped telescopic rod 51 will also drive the support rod 55 and the rubber scraper 56 to rotate during the rotation process, and the mixed dust adhered to the inner wall of the mixing barrel 1 is scraped off by the rubber scraper 56. During the adaptive extension and retraction process of the L-shaped telescopic rod 51, its sub-rods will drive the support rod 55 and the rubber scraper 56 to move in the vertical direction, so as to increase the scraping range of the rubber scraper 56.

[0050] In addition, the present invention also provides a method for preparing the masterbatch preparation device, which specifically comprises the following steps:

[0051] S1, first manually add the carrier, auxiliary powder and self-dispersible pigment into the material container 21, and then cover the end cover 22;

[0052] S2, start the reciprocating motor 271, and drive the driving shaft 272 to rotate back and forth at a uniform speed through the reciprocating motor 271, thereby driving the distributor 26 to rotate back and forth at a uniform speed. When the leakage groove on the distributor 26 rotates to the main feeding channel of the transition pipe 24, the mixed powder inside the material barrel 21 will fall downward through the leakage groove. Since the rotation speed of the distributor 26 is uniform, the amount of mixed powder falling at a single time is the same, thereby achieving the effect of intermittent quantitative feeding. Subsequently, the mixed powder will fall through the feeding tube 3 into the bridge-type material guiding channel at the upper end of the guiding column 11, and then the bridge-type material guiding channel will guide the mixed powder to both sides and transport it to the bottom of the mixing barrel 1. The reset spring 32 arranged at the lower end of the feeding tube 3 can make the sealing plate 31 open downward during each feeding process. After the feeding is completed, the sealing plate 31 is reset to close the lower end of the feeding tube 3 to ensure the sealing of the mixing barrel 1.

[0053] When the mixed powder falls to the bottom of the mixing barrel 1, the discharge pipe 3 will drive the L-shaped telescopic rod 51, the mixing plate 52, the gear ring 53 and the mixing rod 54 to reciprocate around the central axis of the guide column 11. At the same time, under the meshing action of the gear ring 53 and the outer tooth pattern 12, the mixing plate 52 and the mixing rod 54 can rotate around the central axis of the gear ring 53. The two rotation forms cooperate with each other to mix the mixed powder evenly. As the mixed powder at the bottom of the mixing barrel 1 continues to increase, the extrusion force of the mixed powder on the mixing plate 52 can drive the L-shaped telescopic rod 51 to rotate automatically. Adapting to compression, the mixing disc 52, the gear ring 53 and the mixing rod 54 will also adaptively move upward, so as to achieve the purpose of uniformly stirring the mixed powders of different volumes, and the L-shaped telescopic rod 51 will also drive the support rod 55 and the rubber scraper 56 to rotate during the rotation process, and the mixed dust adhering to the inner wall of the mixing barrel 1 is scraped off by the rubber scraper 56. During the adaptive extension and retraction process of the L-shaped telescopic rod 51, its sub-rod will drive the support rod 55 and the rubber scraper 56 to move in the vertical direction, so as to expand the scraping range of the rubber scraper 56;

[0054] S3. In the process of uniformly mixing the carrier, auxiliary powder and self-dispersible pigment, a large amount of dust will be generated inside the mixing barrel 1, and the driving shaft 272 will drive the active pulley 273 to reciprocate during the rotation process. Under the action of the annular belt 274, the driven pulley 275, the discharge pipe 3 and the threaded section 41 will also reciprocate. Under the action of the limit rod 43, the lifting ring 42 will reciprocate up and down along the threaded section 41. When the lifting ring 42 moves downward, the lifting ring 42 will drive the linkage rod 45, the I-shaped slide 44, the dust removal net 46 and the support spring 47 to move downward, so that the dust inside the mixing barrel 1 is captured by the dust removal net 46. As the dust on the dust removal net 46 increases, the dust on the dust removal net 46 increases. As the amount of dust increases, its gravity will gradually increase. When the gravity of the dust on the dust removal net 46 is greater than the elastic force of the support spring 47, the dust removal net 46 and the dust will compress the support spring 47 by a certain distance. When the dust removal net 46 moves downward to a distance close to the maximum distance next time, the lower surface of the dust removal net 46 will contact the upper end of the scraper 49, and the L-shaped connecting rod 48 and the scraper 49 will also be driven to rotate during the rotation of the discharge pipe 3. After the dust removal net 46 and the scraper 49 are in contact, the scraper 49 can scrape off the dust adhered to the lower surface of the dust removal net 46 and slide along the concave arc structure at the upper end of the scraper 49 to the bottom of the mixing barrel 1 to be stirred again. In this way, the effect of cleaning the dust removal net 46 can be achieved.

[0055] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for preparing masterbatch, comprising a mixing drum (1) with a sloped bottom edge, characterized in that: The mixing barrel (1) is provided with a feeding assembly (2) at the upper end, a feeding pipe (3) is installed at the lower end of the feeding assembly (2), the lower end of the feeding pipe (3) extends into the interior of the mixing barrel (1), a dust removal assembly (4) is installed in the middle of the feeding pipe (3), and a mixing assembly (5) is symmetrically arranged at the lower end of the outer wall of the feeding pipe (3); The dust removal component (4) comprises A threaded section (41), wherein a threaded section (41) is provided in the middle of the feed tube (3); A lifting ring (42), the outer side of the threaded section (41) being threadedly connected with the lifting ring (42); A limiting rod (43) is symmetrically mounted on the middle of the outer wall of the lifting ring (42); a limiting groove is provided on the inner wall of the mixing barrel (1) corresponding to the limiting rod (43); and the end of the limiting rod (43) away from the lifting ring (42) is slidably arranged in the limiting groove; An I-shaped slide cylinder (44) is provided on the feed tube (3) below the lifting ring (42) and is fitted with the I-shaped slide cylinder (44) in a clearance fit; A linkage rod (45) is symmetrically mounted on the lower end of the lifting ring (42), and the lower end of the linkage rod (45) is fixedly connected to the upper end of the I-shaped slide cylinder (44); A dust removal net (46) is sleeved on the I-shaped slide cylinder (44), and the outer edge of the dust removal net (46) is slidably matched with the inner wall of the mixing cylinder (1); A support spring (47) is sleeved on the I-shaped slide cylinder (44) and located below the dust removal net (46); An L-shaped connecting rod (48) is symmetrically mounted on the feed tube (3) below the I-shaped slide cylinder (44); A scraper (49) is fixedly mounted on the end of the L-shaped connecting rod (48) away from the discharge pipe (3). When the gravity of the dust on the dust removal net (46) is greater than the elastic force of the support spring (47), the lower surface of the dust removal net (46) will contact the upper end of the scraper (49); A driving unit (27) is installed at the upper end of the mixing barrel (1), and the driving unit (27) comprises a reciprocating motor (271). The reciprocating motor (271) is fixedly installed at the upper end of the mixing barrel (1) through a machine base, and a driving shaft (272) is installed on the output shaft of the reciprocating motor (271). A driving pulley (273) is fixedly provided at a position close to the lower end of the driving shaft (272), and a driven pulley (275) is fixedly provided on the discharge pipe (3) corresponding to the driving pulley (273). The driving pulley (273) is connected to the driven pulley (275) via an annular belt (274).

2. The device for preparing a masterbatch according to claim 1, characterized in that: A material guide column (11) is fixedly arranged in the middle of the bottom of the mixing cylinder (1), and an outer tooth pattern (12) is arranged on the outer side wall of the lower half of the material guide column (11).

3. The device for preparing a masterbatch according to claim 2, characterized in that: A bridge-shaped material guiding channel is provided in the middle of the upper end of the material guiding column (11).

4. The device for preparing a masterbatch according to claim 1, characterized in that: The material discharge assembly (2) comprises a material holding barrel (21), the material holding barrel (21) is arranged above the mixing barrel (1), an end cover (22) is installed at the upper end of the material holding barrel (21), the material holding barrel (21) is fixedly connected to the side wall of the mixing barrel (1) through a No. 1 fixing frame (23), a transition material pipe (24) is connected to the lower end of the material holding barrel (21), the transition material pipe (24) is fixedly connected to the side wall of the mixing barrel (1) through a No. 2 fixing frame (25), a cavity is arranged in the middle of the transition material pipe (24), a distributor (26) is arranged in the cavity, and the upper end of the driving unit (27) is fixedly connected to the distributor (26).

5. The device for preparing a masterbatch according to claim 4, characterized in that: The upper end of the driving shaft (272) extends into the interior of the cavity and is fixedly connected to the distributor (26).

6. The device for preparing a masterbatch according to claim 1, characterized in that: A sealing plate (31) is hingedly connected to one side of the lower end of the feed tube (3), and a return spring (32) is installed between the middle part of the upper end of the sealing plate (31) and the inner side wall of the feed tube (3).

7. The device for preparing a masterbatch according to claim 1, characterized in that: The upper side of the scraper (49) is in a concave arc structure.

8. The device for preparing a masterbatch according to claim 4, characterized in that: The mixing assembly (5) comprises an L-shaped telescopic rod (51), the L-shaped telescopic rod (51) is symmetrically mounted on the lower end of the outer wall of the feeding tube (3), the lower end of the L-shaped telescopic rod (51) is rotatably connected to a mixing disk (52), a gear ring (53) is fixedly mounted on the side wall of the mixing disk (52), the gear ring (53) and the outer tooth pattern (12) are meshed with each other, mixing rods (54) are evenly arranged on the lower end surface of the mixing disk (52), a support rod (55) is fixedly connected to the middle part of the sub-rod of the L-shaped telescopic rod (51), a rubber scraper (56) is fixedly mounted on the end of the support rod (55) away from the sub-rod, and the rubber scraper (56) is in contact with the inner wall of the mixing barrel (1).

9. The device for preparing a masterbatch according to claim 8, characterized in that: The support rod (55) is made of rubber material, and the length of the support rod (55) is equal to the radius of the mixing plate (52).

10. A method for preparing a masterbatch, using the device for preparing a masterbatch according to claim 9, characterized in that: The following steps are involved: S1, first manually adding the carrier, auxiliary powder and self-dispersible pigment into the material container (21), and then covering the end cover (22); S2, starting the driving unit (27), driving the distributor (26) to rotate at a constant speed through the driving unit (27), thereby realizing intermittent continuous feeding, and the carrier, auxiliary powder and self-dispersible pigment will fall into the mixing barrel (1) through the feeding pipe (3), and the mixing component (5) can mix the carrier, auxiliary powder and self-dispersible pigment evenly; S3. During the mixing process, the dust removal component (4) can collect the generated dust and make it fall to the bottom of the mixing barrel (1) for re-mixing. At the same time, the rubber scraper (56) can scrape off the dust adhering to the inner wall of the mixing barrel (1).

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