Plastic masterbatch drying and screening device and method

Abstract

The present application discloses a plastic masterbatch drying and screening device and method, comprising a frame, an outer cylinder arranged in the frame, an inner cylinder rotatably connected to the inner cylinder, and a driving member for driving the inner cylinder to rotate, the outer cylinder and the inner cylinder have axes that coincide with and are arranged horizontally, a sandwich is formed between the inner cylinder and the outer cylinder, the frame is provided with a feeding mechanism for feeding materials into the inner cylinder, the cylinder wall of the inner cylinder is evenly provided with a plurality of sieve holes for small particle materials to pass through, and a heating component for heating the cylinder wall of the inner cylinder. The present application has the effect of improving the drying and screening efficiency of masterbatch.

Description

Technical Field

[0001] The present application relates to the field of masterbatch production and processing, and in particular to a plastic masterbatch drying and screening device and method. Background Art

[0002] Masterbatch is mainly made of colorants, resin carriers, dispersing aids, etc. It is often used as pigments for various types of plastics such as plastic films, packaging films, greenhouse films, woven fabrics, non-woven fabrics, agricultural films, etc. Its production process mainly includes dry and wet methods, and the steps include ingredient mixing, melt extrusion, pelletizing and cooling, drying and screening, packaging, etc.

[0003] In the related art, the drying operation of masterbatch is usually achieved by heat transfer. According to the type of dryer, the heat transfer method can be divided into direct heat transfer and indirect heat transfer. In the direct heat transfer drum dryer, the heat carrier fluid is in direct contact with the masterbatch material, and the heat is mainly transferred by convection; while in the indirect heat transfer drum dryer, the heat carrier is not in direct contact with the masterbatch material, and the heat is transferred to the masterbatch material through the heat transfer wall. Under the power drive, the tank of the dryer rotates slowly, so that the masterbatch material in the tank is in a flowing state, thereby enhancing the drying effect. After the masterbatch is dried, it is poured into the screening machine for screening, so as to screen out the masterbatch materials of different particle sizes. There are steps of material unloading, loading and transportation between the drying process and the screening process, which overall affects the drying and screening efficiency of the masterbatch, so there is still room for improvement. Summary of the invention

[0004] In order to improve the drying and screening efficiency of masterbatches, the present application provides a plastic masterbatch drying and screening device and method.

[0005] The present application provides a plastic masterbatch drying and screening device and method using the following technical solutions:

[0006] A plastic masterbatch drying and screening device comprises a frame, an outer cylinder arranged in the frame, an inner cylinder rotatably connected to the inner part of the outer cylinder, and a driving member for driving the inner cylinder to rotate, the outer cylinder and the inner cylinder have axes that coincide with and are arranged horizontally, a sandwich is formed between the inner cylinder and the outer cylinder, the frame is provided with a feeding mechanism for feeding materials into the inner cylinder, the cylinder wall of the inner cylinder is evenly provided with a plurality of sieve holes for small particle materials to pass through, and a heating component for heating the cylinder wall of the inner cylinder.

[0007] By adopting the above technical scheme, the masterbatch material is fed into the inner cylinder by utilizing the feeding mechanism, the heating component heats the inner cylinder, and thus dries the masterbatch by heat transfer, the driving member drives the inner cylinder with the sieve holes to rotate, so that the masterbatch material remains in a flowing state, and the masterbatch particle drying efficiency is improved while the masterbatch material is screened, the large particle material is retained inside the inner cylinder, and the small particle material falls into the interlayer between the inner cylinder and the outer cylinder, and since the heating component heats the entire inner cylinder wall, the heat can also be transferred to the interlayer space, so as to continue to maintain the drying effect on the small particle material, and the drying and screening steps of the equipment are carried out simultaneously, while the large and small particle materials after screening are kept dry, which is beneficial to the overall improvement of the drying and screening efficiency of the masterbatch.

[0008] Preferably, the outer wall of the inner cylinder is provided with a plurality of sieve rods, the plurality of sieve rods are circumferentially distributed on the outer wall of the inner cylinder and spaced apart along the axial direction of the inner cylinder, and the sieve rods extend toward the inner wall of the outer cylinder.

[0009] By adopting the above technical solution, while the inner cylinder rotates, the screen rod also swings accordingly, thereby stirring the small particle material in the interlayer between the outer cylinder and the inner cylinder, which can make the small particle material in the interlayer also in a relatively fluid state, improving the situation where the small particle material is piled up in the interlayer and is motionless, which is beneficial to improving the drying efficiency of the small particle material.

[0010] Preferably, it also includes a plurality of partitions, which are spaced apart inside the inner cylinder to form a plurality of compartments distributed side by side, each of the partitions is provided with a push rod, and two adjacent partitions are separated by the push rod to maintain the spacing; a feed slot for connecting to a feed mechanism is provided on the top of the partition; the partition can slide along the axial direction of the inner cylinder, and can slide into the inner cylinder from the end entrance of the inner cylinder and can slide out of the inner cylinder from the end exit of the inner cylinder.

[0011] By adopting the above technical solution, when the masterbatch material is added, the partition slides into the inner cylinder from the entrance at the end of the inner cylinder and forms a compartment with the adjacent partition. At this time, the feeding mechanism is connected with the feeding slot of the partition at the entrance of the end of the inner cylinder to load the masterbatch particles into the compartment, and then continue to load the next partition into the entrance of the end of the inner cylinder. Due to the push-up effect of the push rod, the multiple partitions inside the inner cylinder are pushed toward the outlet direction of the end of the inner cylinder. The newly loaded partition forms a new compartment with the previous partition, so that the masterbatch material can continue to be loaded. As the partition is continuously loaded, the feeding mechanism can continuously feed different compartments. The step of loading the material and the partition is to achieve the purpose of pushing the material, so as to smoothly and efficiently complete the masterbatch loading step of the entire inner cylinder, which can meet the loading needs of the long inner cylinder, so that a large number of masterbatches can be screened and dried simultaneously; when discharging, the partition close to the end outlet of the inner cylinder can be pushed out by continuing to load the partition, and the large particle material that has been screened and dried in the compartment can be taken out together, thereby achieving the purpose of simultaneous feeding and discharging of the equipment, which not only solves the difficulty of loading the long inner cylinder, but also shortens the feeding and discharging time, which is beneficial to improving the overall working efficiency of the equipment.

[0012] Preferably, the feeding mechanism includes a feeding hopper slidably connected to the frame and a feeding pipe connected to the bottom of the feeding hopper, and the feeding pipe is used to be plugged into the feeding slot; the sliding direction of the feeding hopper is consistent with the length direction of the outer cylinder.

[0013] By adopting the above technical solution, when feeding into the compartment formed by adjacent partitions, the feed hopper moves toward the outer cylinder, and the feed pipe is inserted into the feed slot of the partition to achieve the docking purpose. When drying and screening the masterbatch particles, the feed hopper moves away from the outer cylinder, so that the feed pipe is separated from the material receiving slot of the partition, thereby not affecting the normal operation of the drying and screening device.

[0014] Preferably, a material drop groove connected to the interlayer is provided at the bottom of the outer cylinder, the material drop groove extends along the length direction of the outer cylinder, and a blocking mechanism for blocking the material drop groove is provided at the bottom of the outer cylinder.

[0015] By adopting the above technical solution, the material drop chute serves as the outlet of the small particle material at the outer cylinder, so that the small particle material can be discharged after drying. When the drying and screening device is working, the material drop chute is blocked by the blocking mechanism, so that a relatively closed space can be formed inside the outer cylinder, which is beneficial to improving the drying effect of the masterbatch material.

[0016] Preferably, the blocking mechanism includes a blocking strip for sealing and blocking the material delivery chute, guide plates arranged on both sides of the bottom of the blocking strip, and a telescopic top support member for driving the blocking strip to move up and down, and the guide plates extend downwardly and obliquely in a direction away from the blocking strip.

[0017] By adopting the above technical solution, the sealing strip has a sealing effect on the material chute. In addition, driven by the telescopic top support, the sealing strip moves downward and separates from the material chute, thereby opening the material chute. Small particles of material are discharged from the material chute and move to both sides under the action of the guide plate, which is conducive to the smooth discharge of small particles of material.

[0018] Preferably, the outer tube is provided with a blowing mechanism, and the blowing mechanism is used to blow air into the inner part of the outer tube, and an air outlet is provided at the top of the outer tube.

[0019] By adopting the above technical solution, when the drying and screening device is working, air is blown into the outer cylinder through the blowing mechanism, so that the hot air inside the outer cylinder flows, and the drying effect of the masterbatch material is further improved. The setting of the air outlet can keep the pressure inside and outside the outer cylinder in a relatively balanced state; in addition, the airflow formed by the blowing mechanism also has a certain impact on the sieve hole, which can reduce the probability of clogging the sieve hole, which is beneficial to maintaining the screening efficiency of the sieve hole and is beneficial to improving the drying and screening effect of the masterbatch drying and screening device as a whole.

[0020] A method for drying and screening plastic masterbatch, using a plastic masterbatch drying and screening device, comprises the following steps:

[0021] S1: The partitions are loaded into the inner cylinder one by one. During the loading process, the partitions slide into the inner cylinder from the entrance at the end of the inner cylinder and form compartments with adjacent partitions. Each time a compartment is formed, the feeding mechanism puts a certain amount of masterbatch material into the compartment. After the masterbatch material is filled in the compartment and the next partition is loaded into the inner cylinder, the partitions in the inner cylinder and the corresponding masterbatch material are pushed toward the outlet direction of the inner cylinder end due to the push-up effect of the push rod until all the partitions are in place inside the inner cylinder, thereby completing the inner cylinder loading step.

[0022] S2: Start the heating assembly, the blowing mechanism and the driving part, the inner cylinder rotates and heats and dries the masterbatch material inside the inner cylinder, the large particles in the masterbatch material are retained inside the inner cylinder, the small particles fall into the interlayer between the inner cylinder and the outer cylinder, the sieve rod stirs the small particles in the interlayer, the blowing mechanism forms a hot air flow inside the outer cylinder, and the hot air flow dries the large particles in the inner cylinder and the small particles in the interlayer;

[0023] S3: After the drying and screening steps are completed, the partitions are continuously loaded one by one into the inlet of the inner cylinder end, and the partitions near the outlet of the inner cylinder end are pushed out one by one, and the large particles in the compartment that have been screened and dried are taken out together. The inner cylinder loading step in S1 is carried out simultaneously during the process of loading the partitions;

[0024] S4: Start the telescopic top support to drive the sealing strip to open the drop chute at the bottom of the outer cylinder. The small particles are discharged from the drop chute, and the unloading work of the final drying and screening device is completed.

[0025] By adopting the above technical scheme, the step of loading the partition achieves the purpose of pushing the material, thereby smoothly and efficiently completing the masterbatch loading step of the entire inner cylinder. When discharging, the partition close to the end outlet of the inner cylinder is pushed out and the unloading is completed, thereby achieving the purpose of simultaneous feeding and discharging of the equipment. It not only solves the problem of difficulty in loading the long inner cylinder, but also shortens the feeding and discharging time, which is beneficial to improving the overall work efficiency of the equipment. The direct heating of the heating component and the blowing mechanism cooperate with the indirect heating of the inner cylinder, which is beneficial to improving the drying and screening effect of the equipment.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. Use the feeding mechanism to put the masterbatch material into the inner cylinder. The heating component heats the inner cylinder to dry the masterbatch by heat transfer. The driving part drives the inner cylinder with sieve holes to rotate, so that the masterbatch material remains in a flowing state, improving the drying efficiency of the masterbatch particles while screening the masterbatch materials. Large particles are retained inside the inner cylinder, while small particles fall into the interlayer between the inner cylinder and the outer cylinder. Since the heating component heats the entire inner cylinder wall, it can also transfer heat to the interlayer space, thereby continuing to maintain the drying effect of small particles, realizing the simultaneous drying and screening steps of the equipment, while keeping the large and small particles after screening dry, which is conducive to improving the overall drying and screening efficiency of the masterbatch;

[0028] 2. The step of loading the partition achieves the purpose of pushing the material, so as to smoothly and efficiently complete the masterbatch loading step of the entire inner cylinder. When discharging, the partition close to the end outlet of the inner cylinder is pushed out by loading the partition and the unloading is completed, thereby achieving the purpose of synchronous feeding and discharging of the equipment, which not only solves the problem of difficult loading of the long inner cylinder, but also shortens the feeding and discharging time, which is conducive to improving the overall working efficiency of the equipment;

[0029] 3. The direct heating of the heating component and the indirect heating of the inner cylinder by the blowing mechanism are beneficial to improving the drying and screening effect of the equipment. In addition, the airflow formed by the blowing mechanism also has a certain impact on the sieve holes, which can reduce the probability of sieve hole blockage; BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the external structure of a plastic masterbatch drying and screening device according to an embodiment of the present application.

[0031] Figure 2It is a schematic diagram of the internal structure of an outer cylinder in a plastic masterbatch drying and screening device according to an embodiment of the present application.

[0032] Figure 3 It is a schematic diagram of the internal structure at the inlet of the end of the inner cylinder in a plastic masterbatch drying and screening device in an embodiment of the present application.

[0033] Figure 4 It is a schematic diagram of the internal structure at the outlet of the end of the inner cylinder in a plastic masterbatch drying and screening device in an embodiment of the present application.

[0034] Explanation of the reference numerals in the accompanying drawings: 1. frame; 11. guide plate; 12. side collecting trough; 13. rear collecting trough; 2. outer cylinder; 21. air outlet; 22. drop chute; 3. inner cylinder; 31. inlet; 32. outlet; 33. sieve hole; 34. sieve rod; 4. interlayer; 5. feeding mechanism; 51. feeding hopper; 52. feeding pipe; 6. sealing mechanism; 61. sealing strip; 62. telescopic top support; 63. guide plate; 7. blowing mechanism; 8. driving member; 9. partition; 91. feeding slot; 92. top rod; 10. compartment. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-4 This application is described in further detail.

[0036] The present application embodiment discloses a plastic masterbatch drying and screening device, referring to Figure 1 and Figure 2, including a frame 1, an outer cylinder 2 installed and fixed in the frame 1, an inner cylinder 3 rotatably connected to the inner part of the outer cylinder 2, and a driving member 8 for driving the inner cylinder 3 to rotate. Among them, the outer cylinder 2 and the inner cylinder 3 have overlapping axes and are arranged horizontally, and an interlayer 4 is formed between the inner cylinder 3 and the outer cylinder 2. In this embodiment, one end of the inner cylinder 3 is an inlet 31, and the other end is an outlet 32. A feeding mechanism 5 for feeding materials into the inner cylinder 3 is installed at the top left side of the frame 1, and the feeding mechanism 5 is close to the inlet 31 at the end of the inner cylinder 3. In addition, a plurality of sieve holes 33 for small particle materials to pass through and a heating component for heating the wall of the inner cylinder 3 are evenly arranged on the wall of the inner cylinder 3. By utilizing the feeding mechanism 5 to feed the masterbatch material into the inner cylinder 3, the heating component heats the inner cylinder 3, thereby drying the masterbatch in a heat transfer manner. The driving member 8 drives the inner cylinder 3 with the sieve hole 33 to rotate, so that the masterbatch material remains in a flowing state, thereby improving the drying efficiency of the masterbatch particles and screening the masterbatch materials. Large particles are retained in the inner cylinder 3, while small particles fall into the interlayer 4 between the inner cylinder 3 and the outer cylinder 2. The heating component heats the entire wall of the inner cylinder 3, thereby also transferring heat to the interlayer 4 space, thereby continuing to maintain the drying effect on the small particles, realizing the simultaneous drying and screening steps of the equipment, while maintaining the drying of the screened large and small particles, which is beneficial to improving the overall drying and screening efficiency of the masterbatch.

[0037] Specifically, the driving member 8 adopts a common synchronous belt transmission mechanism, and is driven by a motor, and is installed on the left side of the frame 1, which is conducive to improving the stability of the rotation of the inner cylinder 3. The heating component adopts a heating wire (not shown in the figure) embedded in the wall of the inner cylinder 3. The inner cylinder 3 is made of steel with good thermal conductivity. The entire inner cylinder 3 is heated by the heating wire so that the inner and outer sides of the inner cylinder 3 can be evenly heated. In addition, the outer wall of the outer cylinder 2 is covered with a heat-insulating material to prevent the staff from touching and getting burned.

[0038] In this embodiment, a plurality of sieve rods 34 are fixed to the outer wall of the inner cylinder 3. The plurality of sieve rods 34 are distributed circumferentially on the outer wall of the inner cylinder 3 and are spaced apart along the axial direction of the inner cylinder 3. The sieve rods 34 extend toward the inner wall of the outer cylinder 2. When the inner cylinder 3 rotates, the sieve rods 34 also rotate with the inner cylinder 3 to stir the small particle material in the interlayer 4, so that the small particle material in the interlayer 4 is also in a relatively flowing state, thereby improving the situation where the small particle material is piled up in the interlayer 4 and is motionless, which is beneficial to improving the drying efficiency of the small particle material.

[0039] Reference Figure 3 and Figure 4In this embodiment, the masterbatch drying and screening device further includes a plurality of partitions 9, the outer diameter of which is adapted to the inner diameter of the inner tube 3, so that the partitions 9 can slide along the axial direction of the inner tube 3, and can also slide into the inner tube 3 from the end inlet 31 of the inner tube 3, and can also slide out of the inner tube 3 from the end outlet 32 ​​of the inner tube 3. A plurality of partitions 9 are arranged inside the inner tube 3 at intervals to form a plurality of compartments 10 arranged side by side, and the compartments 10 are used to accommodate the masterbatch material. In addition, a rubber layer is arranged on the outer peripheral surface of the partition 9 to improve the sealing effect between the partition 9 and the inner wall of the inner tube 3.

[0040] A plurality of circumferentially distributed push rods 92 are fixed to one side of each partition plate 9 facing the inlet 31 at the end of the inner tube 3, and the length direction of the push rods 92 is parallel to the axial direction of the inner tube 3. Two adjacent partition plates 9 are separated by the push rods 92 to maintain an equal spacing. In addition, a feed slot 91 for connecting with the feed mechanism 5 is opened on the top of the partition plate 9.

[0041] In this embodiment, the feeding mechanism 5 includes a feeding hopper 51 slidably connected to the top of the left side of the frame 1 and a feeding pipe 52 connected to the bottom of the feeding hopper 51, and the feeding pipe 52 extends downward and the pipe mouth faces the inlet 31 at the end of the inner cylinder 3. The feeding pipe 52 is used to be plugged into the feeding slot 91 to achieve the feeding of the masterbatch material; the sliding direction of the feeding hopper 51 is consistent with the length direction of the outer cylinder 2, which facilitates the connection step between the feeding pipe 52 and the feeding slot 91.

[0042] In this embodiment, a material drop groove 22 connected to the interlayer 4 is provided at the bottom of the outer cylinder 2, and the material drop groove 22 extends along the length direction of the outer cylinder 2. A blocking mechanism 6 for blocking the material drop groove 22 is provided at the bottom of the outer cylinder 2. The blocking mechanism 6 includes a blocking bar 61 for sealing and blocking the material drop groove 22, a guide plate 63 fixed on both sides of the bottom of the blocking bar 61, and a telescopic top support member 62 for driving the blocking bar 61 to move up and down. The guide plate 63 extends downwardly and obliquely away from the blocking bar 61. The telescopic top support member 62 is specifically a plurality of universal oil cylinders, which are spaced apart along the length direction of the blocking bar 61. The blocking strip 61 has a sealing effect on the material chute 22. When unloading, the blocking strip 61 is driven by the telescopic top support 62 to move downward and separate from the material chute 22, thereby opening the material chute 22, and small particles are discharged from the material chute 22 and move to both sides under the action of the guide plate 63, which is conducive to the smooth discharge of small particles. In this embodiment, a side collection groove 12 can be arranged below the inclined lower end of the guide plate 63 to collect small particles.

[0043] In this embodiment, a blast mechanism 7 is fixedly mounted on the top of the outer wall of the outer cylinder 2. The blast mechanism 7 is specifically a blower. The blast mechanism 7 is used to blow air into the inner part of the outer cylinder 2 so that the hot air inside the outer cylinder 2 flows, thereby improving the drying effect of the masterbatch material. An air outlet 21 connected to the interlayer 4 is provided on the top of the outer cylinder 2 to keep the pressure inside and outside the outer cylinder 2 in a relatively balanced state.

[0044] The embodiment of the present application also discloses a method for drying and screening plastic masterbatch, which uses a plastic masterbatch drying and screening device, and includes the following steps:

[0045] S1: The partitions 9 are loaded into the inner cylinder 3 one by one. During the loading process, the partitions 9 slide into the inner cylinder 3 from the inlet 31 at the end of the inner cylinder 3 and form a compartment 10 with the adjacent partitions 9. Each time a compartment 10 is formed, the feeding mechanism 5 puts a certain amount of masterbatch material into the compartment 10. During the process of the partitions 9 being transferred into the inner cylinder 3, the feeding pipe 52 of the feeding mechanism 5 extends into the inner cylinder 3. The feeding pipe 52 also plays a positioning and guiding role for the partitions 9. The feeding notch 91 at the top of the partitions 9 cooperates with the feeding pipe 52 to facilitate the smooth loading of the partitions 9 into the inner cylinder 3. In order to improve the moving stability of the partitions 9, an arc-shaped guide plate 11 can be installed on the frame 1 near the inlet 31 at the end of the inner cylinder 3. The arc surface of the guide plate 11 is flush with the inner wall of the inner cylinder 3, so as to facilitate the accurate loading of the partitions 9 into the inner cylinder 3. After the compartment 10 is formed, masterbatch material is added into the feed hopper 51 , and the material enters the compartment 10 through the feed pipe 52 . The volume of the material in the compartment 10 is between 1 / 3 and 2 / 3 of the volume of the compartment 10 .

[0046] After the masterbatch material is filled in the compartment 10 and the next partition 9 is loaded into the inner tube 3, due to the push-up effect of the push rod 92, the partition 9 inside the inner tube 3 and the corresponding masterbatch material are pushed toward the outlet 32 ​​at the end of the inner tube 3 until all the partitions 9 are in place inside the inner tube 3 to complete the inner tube 3 loading step.

[0047] S2: After the inner tube 3 is loaded, a cover plate (not shown) is used to seal the inlet 31 and the outlet 32 ​​at the end of the inner tube 3, wherein the cover plate is provided with an avoidance hole to facilitate the passage of the exposed ejector rod 92.

[0048] Start the heating assembly, the blowing mechanism 7 and the driving member 8, the inner cylinder 3 rotates and heats and dries the masterbatch material inside the inner cylinder 3, the large particles in the masterbatch material are retained inside the inner cylinder 3, the small particles fall into the interlayer 4 between the inner cylinder 3 and the outer cylinder 2, the sieve rod 34 stirs the small particles in the interlayer 4, the blowing mechanism 7 forms a hot air flow inside the outer cylinder 2, the hot air flow dries the large particles in the inner cylinder 3 and the small particles in the interlayer 4, and the blower generates a local air flow impact on the sieve hole 33 to reduce the probability of clogging of the sieve hole 33.

[0049] S3: After the drying and screening step is completed, the covers at both ends of the inner cylinder 3 are removed, and then the partitions 9 are continuously loaded one by one into the inlet 31 at the end of the inner cylinder 3, so that the partitions 9 near the outlet 32 ​​at the end of the inner cylinder 3 are ejected one by one, and the large particles in the compartment 10 that have been screened and dried are also taken out during the ejection process. The rear collection tank 13 can be arranged below the outlet 32 ​​at the end of the inner cylinder 3 to collect the large particles. The inner cylinder 3 loading step in S1 is carried out simultaneously during the process of loading the partitions 9, and the feeding and discharging of the drying and screening device are carried out simultaneously.

[0050] S4: Start the telescopic support member 62 to drive the blocking strip 61 to open the drop chute 22 at the bottom of the outer tube 2. The small particles are discharged from the drop chute 22 and fall into the side collecting trough 12 under the guidance of the guide plate 63. Finally, the unloading work of the drying and screening device is completed.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A plastic masterbatch drying and screening device, characterized in that: The invention comprises a frame (1), an outer cylinder (2) arranged in the frame (1), an inner cylinder (3) rotatably connected to the inside of the outer cylinder (2), and a driving member (8) for driving the inner cylinder (3) to rotate, wherein the axes of the outer cylinder (2) and the inner cylinder (3) coincide with each other and are arranged horizontally, and an interlayer (4) is formed between the inner cylinder (3) and the outer cylinder (2), the frame (1) is provided with a feeding mechanism (5) for feeding materials into the inner cylinder (3), the cylinder wall of the inner cylinder (3) is evenly provided with a plurality of sieve holes (33) for small particle materials to pass through, and a heating component for heating the cylinder wall of the inner cylinder (3); The utility model also comprises a plurality of partitions (9), wherein the plurality of partitions (9) are arranged at intervals inside the inner cylinder (3) to form a plurality of compartments (10) arranged side by side, each of the partitions (9) is provided with a push rod (92), and two adjacent partitions (9) are separated by the push rod (92) to maintain a spacing; a feeding slot (91) for connecting with a feeding mechanism (5) is provided on the top of the partition (9); the partition (9) can slide along the axial direction of the inner cylinder (3), and the partition (9) can slide into the inner cylinder (3) from the end inlet (31) of the inner cylinder (3) and can slide out of the inner cylinder (3) from the end outlet (32) of the inner cylinder (3); by installing the partition (9), the partition (9) close to the end outlet of the inner cylinder (3) is pushed out, and the large particle materials in the compartment (10) that have been screened and dried are taken out together, so as to achieve the purpose of synchronous feeding and discharging.

2. A plastic masterbatch drying and screening device according to claim 1, characterized in that: The outer wall of the inner cylinder (3) is provided with a plurality of sieve rods (34), which are circumferentially distributed on the outer wall of the inner cylinder (3) and spaced apart along the axial direction of the inner cylinder (3), and the sieve rods (34) extend toward the inner wall of the outer cylinder (2).

3. A plastic masterbatch drying and screening device according to claim 2, characterized in that: The feeding mechanism (5) comprises a feeding hopper (51) slidably connected to the frame (1) and a feeding pipe (52) connected to the bottom of the feeding hopper (51), wherein the feeding pipe (52) is used for plugging into the feeding slot (91); the sliding direction of the feeding hopper (51) is consistent with the length direction of the outer cylinder (2).

4. A plastic masterbatch drying and screening device according to claim 3, characterized in that: The bottom of the outer cylinder (2) is provided with a material drop groove (22) connected to the interlayer (4); the material drop groove (22) extends along the length direction of the outer cylinder (2); and the bottom of the outer cylinder (2) is provided with a blocking mechanism (6) for blocking the material drop groove (22).

5. A plastic masterbatch drying and screening device according to claim 4, characterized in that: The blocking mechanism (6) comprises a blocking strip (61) for sealing and blocking the material drop chute (22), guide plates (63) arranged on both sides of the bottom of the blocking strip (61), and a telescopic top support member (62) for driving the blocking strip (61) to move up and down, wherein the guide plate (63) extends downwardly and obliquely in a direction away from the blocking strip (61).

6. A plastic masterbatch drying and screening device according to claim 5, characterized in that: The outer tube (2) is provided with a blowing mechanism (7), and the blowing mechanism (7) is used to blow air into the inner part of the outer tube (2). The top of the outer tube (2) is provided with an air outlet (21).

7. A method for drying and screening plastic masterbatch, using a plastic masterbatch drying and screening device as claimed in claim 6, characterized in that: The following steps are involved: S1: The partitions (9) are loaded into the inner cylinder (3) one by one. During the loading process of the partitions (9), the partitions (9) slide into the inner cylinder (3) from the inlet (31) at the end of the inner cylinder (3) and form a compartment (10) with the adjacent partitions (9). Each time a compartment (10) is formed, the feeding mechanism (5) puts a certain amount of masterbatch material into the compartment (10); after the masterbatch material is filled into the compartment (10) and the next partition (9) is loaded into the inner cylinder (3), due to the push-up effect of the push rod (92), the partitions (9) inside the inner cylinder (3) and the corresponding masterbatch material are pushed toward the outlet (32) at the end of the inner cylinder (3) until all the partitions (9) are in place inside the inner cylinder (3), thereby completing the inner cylinder (3) loading step; S2: The heating component, the air blowing mechanism (7) and the driving member (8) are started, the inner cylinder (3) rotates and heats and dries the masterbatch material inside the inner cylinder (3), the large particles in the masterbatch material are retained inside the inner cylinder (3), the small particles fall into the interlayer (4) between the inner cylinder (3) and the outer cylinder (2), the sieve rod (34) stirs the small particles in the interlayer (4), the air blowing mechanism (7) forms a hot air flow inside the outer cylinder (2), and the hot air flow dries the large particles in the inner cylinder (3) and the small particles in the interlayer (4); S3: After the drying and screening steps are completed, the partitions (9) are continuously loaded one by one into the inlet (31) at the end of the inner cylinder (3), and the partitions (9) close to the outlet (32) at the end of the inner cylinder (3) are pushed out one by one, and the large particles in the compartment (10) that have been screened and dried are taken out together. During the process of loading the partitions (9), the inner cylinder (3) loading step in S1 is carried out simultaneously; S4: Start the telescopic support member (62) to drive the blocking strip (61) to open the material drop chute (22) at the bottom of the outer cylinder (2), and the small particles are discharged from the material drop chute (22), thus completing the unloading work of the drying and screening device.

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