Modified nylon master batch screening device with multi-stage screening function

Abstract

The invention discloses a modified nylon master batch screening device with a multi-stage screening function, and relates to the technical field of chemical high polymer material production and processing equipment.The modified nylon master batch screening device is characterized in that a rack is fixedly arranged on the inner wall of a machine shell, a workbench is fixedly arranged on the rack, a vibration disc is arranged on the side of the workbench, a supporting mechanism is arranged on the workbench, and the vibration disc is arranged on the supporting mechanism; the opening and closing mechanism is arranged on the vibration disc, the driving mechanism is arranged on the rack, the driving mechanism and the opening and closing mechanism are arranged in a matched mode, and the discharging pipe is fixed to a side plate of the machine shell in a penetrating mode; according to the raw material screening device, the vibration disc is arranged, so that low-weight and low-density waste in raw materials to be treated floats upwards in a vibration mode, layering of the materials is achieved, screening treatment is facilitated, meanwhile, the structure is optimized for material pouring of the vibration disc, and the screened materials can be poured out conveniently through the vibration disc.

Description

Technical Field

[0001] The invention relates to the technical field of chemical polymer material production and processing equipment, and in particular to a modified nylon masterbatch screening device with multi-stage screening. Background Art

[0002] During production and processing, polymer nylon materials are often prepared in the form of masterbatch particles. Then, in subsequent production, various additives can be added based on the masterbatch material and shaped through corresponding processes. The preparation of nylon materials in the form of masterbatch is conducive to the storage of materials and is also convenient for subsequent production and processing. When preparing masterbatch materials, a wire drawing and cutting process is used. During the processing stage, waste materials of different particle sizes and shapes are easily mixed, so that screening and screening are required after preparation. Conventional screening equipment uses multi-stage mesh screen equipment for graded screening. According to the different mesh screen apertures, masterbatches of different particle sizes are screened out and stored and packaged separately. This screening equipment relies on the weight of the material to fall, and its treatment effect on large-volume, low-density, and low-weight waste materials in the material is poor, so that the material contains filamentous waste and dusty waste. In order to ensure the shoveling quality of the masterbatch raw materials, it is now planned to redesign the screening equipment so that the dusty waste and low-density waste in the material can be processed. Summary of the invention

[0003] The purpose of the present invention is to address the defects and shortcomings of the prior art and provide a modified nylon masterbatch screening device with multi-stage screening. A vibrating plate is set up to make low-weight, low-density waste materials in the raw materials to be processed float up by vibration, thereby achieving material stratification to facilitate screening processing. At the same time, the structure of the vibrating plate is optimized to facilitate the pouring of the screened materials.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] It includes a frame, a casing, and a workbench, wherein the frame is fixedly arranged on the inner wall of the casing, and the workbench is fixedly arranged on the frame. It also includes:

[0006] A vibration plate, wherein the vibration plate is arranged on the side of the workbench;

[0007] A supporting mechanism, wherein the supporting mechanism is arranged on a workbench, and a vibration plate is arranged on the supporting mechanism;

[0008] An opening and closing mechanism, wherein the opening and closing mechanism is arranged on the vibration plate;

[0009] A driving mechanism, wherein the driving mechanism is arranged on the frame, and the driving mechanism is matched with the opening and closing mechanism;

[0010] A discharge pipe is passed through and fixed on a side plate of the casing.

[0011] Preferably, a mounting frame is provided on the outside of the casing, the upper end of the casing is fixedly provided on the mounting frame, a dust hopper is provided above the vibration plate, and the dust hopper is connected to the vacuum cleaner equipment through a pipe, a reciprocating stepping seat is fixedly provided on the outer wall of the dust hopper, a stepping screw pair is fixedly provided on the mounting frame, and the reciprocating stepping seat is fixedly provided on the moving unit of the stepping screw pair.

[0012] Preferably, the supporting mechanism comprises:

[0013] A support frame, wherein the support frame is rotatably mounted on the frame via a rotating shaft, and the support frame is arranged inside the housing;

[0014] A vibration motor, wherein the vibration motor is fixedly arranged on a support frame, and a vibration plate is fixedly arranged on an output shaft of the vibration motor;

[0015] A connecting shaft, wherein the connecting shaft is fixedly arranged on the supporting frame;

[0016] The supporting hydraulic rod is rotatably mounted on the frame via a rotating shaft, a connecting sleeve is fixedly arranged on the output shaft of the supporting hydraulic rod, and the output shaft of the supporting hydraulic rod is rotatably mounted on the connecting shaft via the connecting sleeve.

[0017] Preferably, the opening and closing mechanism comprises:

[0018] A side cover plate is provided at an opening at one end of the vibration plate away from the workbench, the side cover plate is provided to cover the side port of the vibration plate, and the bottom plate of the side cover plate is provided to abut against the lower side wall of the vibration plate, and the side plate of the side cover plate is provided between the vibration plate and the side plate of the casing;

[0019] A guide sleeve, wherein the guide sleeve is fixedly arranged on the lower side wall of the side cover plate;

[0020] A positioning rod, the positioning rod being movably inserted into the guide sleeve;

[0021] A positioning sleeve, wherein the positioning sleeve is fixedly arranged on the lower side wall of the vibration plate, and the positioning rod is movably inserted into the positioning sleeve;

[0022] The positioning seat is arranged between the guide sleeve and the positioning sleeve, and the positioning rod is fixedly arranged on the positioning seat.

[0023] Preferably, a support spring is sleeved on the positioning rod, and the support spring is arranged between the guide sleeve and the positioning seat.

[0024] Preferably, the driving mechanism comprises:

[0025] A lifting hydraulic rod, wherein the lifting hydraulic rod is fixedly arranged on the frame and is arranged below the vibration plate;

[0026] A lifting frame, wherein the lifting frame is fixedly arranged on the output shaft of the lifting hydraulic rod;

[0027] A clamping claw, wherein the clamping claw is movably mounted in the lifting frame;

[0028] A clamping sleeve, wherein the clamping sleeve is fixedly arranged on the lower surface of the side cover plate, and the clamping claw is arranged in cooperation with the clamping sleeve;

[0029] A clamping hydraulic rod is fixedly arranged on the lifting frame, and an output shaft of the clamping hydraulic rod is fixedly arranged on the clamping claw.

[0030] Preferably, a guide rod is fixedly provided on the clamping claw, a positioning claw is movably sleeved on the guide rod, a spur gear is rotatably provided on the lifting frame through a rotating shaft, and the spur gear is arranged between the clamping claw and the positioning claw, two spur racks are respectively meshed on both sides of the spur gear, and the two spur racks are respectively fixed on the clamping claw and the positioning claw.

[0031] Preferably, the upper cover of the clamping sleeve is fixedly provided with a load-bearing rod, one end of the load-bearing rod away from the clamping sleeve is fixedly provided on the side cover plate, and the positioning seat is movably sleeved on the load-bearing rod.

[0032] Preferably, a stepping slide is fixedly provided on the mounting frame, a servo stepping unit is slidably mounted on the stepping slide, a scraper plate is fixedly provided on the servo stepping unit, and the lower side of the scraper plate is movably abutted against the upper surface of the workbench.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] This solution sets a rotatable shelf, and sets a vibrating plate on the support frame through a vibrating motor, and sets a movable dust hopper above the vibrating plate, so that the light waste in the raw material can be vibrated and floated up through the vibration of the vibrating plate, and then the waste can be sucked in and screened out through the dust hopper.

[0035] This solution sets a side cover plate for the vibration plate, and sets a corresponding positioning and opening and closing drive mechanism, so that after the vibration plate is lowered and tilted, the side cover plate is clamped by the clamping claws, and the side cover plate is driven to be lowered and opened by the lifting hydraulic rod, so that the side port of the vibration plate is opened, and the processed material in the vibration plate is discharged for subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of the present invention.

[0037] Figure 2It is a structural schematic diagram of the frame, supporting mechanism, opening and closing mechanism, and driving mechanism in the present invention.

[0038] Figure 3 yes Figure 1 Upper left side view.

[0039] Figure 4 yes Figure 1 Right front side view.

[0040] Figure 5 yes Figure 1 Lower right side view.

[0041] Figure 6 It is a structural schematic diagram of the casing and the mounting frame in the present invention.

[0042] Figure 7 It is a structural schematic diagram of the vibration plate and the side cover plate in the present invention.

[0043] Figure 8 It is a schematic diagram of the structure of the clamping claws and the positioning claws in the present invention.

[0044] Description of reference numerals:

[0045] Frame 1, casing 2, workbench 3, vibration plate 4, supporting mechanism 5, supporting frame 5-1, vibration motor 5-2, connecting shaft 5-3, supporting hydraulic rod 5-4, connecting sleeve 5-5, opening and closing mechanism 6, side cover 6-1, guide sleeve 6-2, positioning rod 6-3, positioning sleeve 6-4, positioning seat 6-5, driving mechanism 7, lifting hydraulic rod 7-1, lifting frame 7-2, clamping claw 7-3, clamping sleeve 7-4, clamping hydraulic rod 7-5, discharge pipe 8, mounting frame 9, dust hopper 10, reciprocating stepping seat 11, stepping screw pair 12, supporting spring 13, guide rod 14, positioning claw 15, spur gear 16, spur rack 17, load-bearing rod 18, stepping slide rail 19, servo stepping unit 20, scraper plate 21. DETAILED DESCRIPTION

[0046] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. The preferred embodiments in the description are only used as examples, and all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present invention.

[0047] like Figure 1-8 As shown, this specific implementation adopts the following technical solutions:

[0048] This specific embodiment includes a frame 1, a casing 2, and a workbench 3, wherein the frame 1 is fixedly arranged on the inner wall of the casing 2, the workbench 3 is fixedly arranged on the frame 1, a supporting mechanism 5 is arranged on the frame 1, a vibrating plate 4 is arranged on the supporting mechanism 5, and then when the vibrating plate 4 is laid flat, the upper side of the vibrating plate 4 is arranged flush with the upper surface of the workbench 3, the vibrating plate 4 is arranged with an opening at one end away from the workbench 3, an opening and closing mechanism 6 is arranged at the side port of the vibrating plate 4, and a driving mechanism 7 is arranged on the frame 1 below the vibrating plate 4, when the vibrating plate 4 is lowered and tilted by the supporting mechanism 5, the driving mechanism 7 is docked with the opening and closing mechanism 6, and the opening and closing mechanism 6 can be opened by the driving mechanism 7, so as to discharge the raw materials in the vibrating plate 4;

[0049] The support mechanism 5 includes a support frame 5-1 and a support hydraulic rod 5-4. The support frame 5-1 is rotatably mounted on the frame 1 via a rotating shaft. A vibration motor 5-2 is fixedly mounted on the support frame 5-1. A vibration plate 4 is fixedly mounted on the output shaft of the vibration motor 5-2. A connecting shaft 5-3 is fixedly mounted on the support frame 5-1. The support hydraulic rod 5-4 is rotatably mounted on the frame 1 via a rotating shaft. A connecting sleeve 5-5 is fixedly mounted on the output shaft of the support hydraulic rod 5-4. The connecting sleeve 5-5 is rotatably mounted on the connecting shaft 5-3 via a bearing.

[0050] A mounting frame 9 is provided outside the casing 2, and the mounting frame 9 is fixedly arranged on the upper end of the outer wall of the casing 2, two stepping slide rails 19 are fixedly arranged on the mounting frame 9 in a front-to-back symmetrical manner, a servo stepping unit 20 is mounted on the stepping slide rail 19, a scraper plate 21 is fixedly arranged on the servo stepping unit 20, and the lower side of the scraper plate 21 is movably abutted against the upper surface of the workbench 3, a stepping screw pair 12 is fixedly arranged on the mounting frame 9, a reciprocating stepping seat 11 is fixedly arranged on the moving unit of the stepping screw pair 12, a dust hopper 10 is fixedly arranged on the reciprocating stepping seat 11, and the dust hopper 10 is mounted above the vibration plate 4, and the dust hopper 10 is connected to the external dust collector unit through a pipeline;

[0051] The opening and closing mechanism 6 includes a side cover plate 6-1 and a positioning sleeve 6-4. The side cover plate 6-1 is "L"-shaped and covers the side port of the vibration disk 4. The bottom plate of the side cover plate 6-1 is against the lower surface of the vibration disk 4, and the side plate of the cover plate is clamped between the vibration disk 4 and the side plate of the casing 2. A guide sleeve 6-2 is fixedly arranged on the lower side wall of the side cover plate 6-1, and a positioning sleeve 6-4 is fixedly arranged on the lower surface of the vibration disk 4. A positioning seat 6-5 is arranged between the positioning sleeve 6-4 and the guide sleeve 6-2, and a positioning rod 6-3 is fixedly arranged on the positioning seat 6-5, wherein one end of the positioning rod 6-3 is movably inserted in the positioning sleeve 6-4, and the other end of the positioning rod 6-3 is movably inserted in the guide sleeve 6-2, and a supporting spring 13 is sleeved on the positioning rod 6-3, and the supporting spring 13 is clamped between the positioning seat 6-5 and the guide sleeve 6-2, and a discharge pipe 8 is fixedly arranged on the side plate of the casing 2 on the upper side of the lifting frame 7-2;

[0052] The driving mechanism 7 includes a lifting frame 7-2 and a clamping claw 7-3. A lifting hydraulic rod 7-1 is fixedly arranged on the frame 1. The lifting frame 7-2 is fixedly arranged on the output shaft of the lifting hydraulic rod 7-1. A clamping claw 7-3 is movably arranged on the lifting frame 7-2. A clamping sleeve 7-4 is fixedly arranged on the lower side wall of the side cover plate 6-1, and the clamping sleeve 7-4 is matched with the clamping claw 7-3. A guide rod 14 is fixedly arranged on the clamping claw 7-3. A positioning claw 15 is movably arranged on the guide rod 14. A spur rack 17 is fixedly arranged on the wall on the side facing the clamping claw 7-3 and the positioning claw 15. A spur gear 16 is rotatably arranged on the lifting frame 7-2 through a rotating shaft. The spur gear 16 is clamped between two spur racks 17 and is respectively meshed with the spur racks 17 on both sides. A clamping hydraulic rod 7-5 is fixedly arranged on the lifting frame 7-2, and the output shaft of the clamping hydraulic rod 7-5 is fixedly arranged on the clamping claw 7-3.

[0053] A load-bearing rod 18 is fixedly arranged on the clamping sleeve 7 - 4 , and the other end of the load-bearing rod 18 is fixedly arranged on the side cover plate 6 - 1 , and the positioning seat 6 - 5 is movably sleeved on the load-bearing rod 18 .

[0054] When using the device, the support frame 5-1 is lifted upward by the supporting hydraulic rod 5-4, so that the support frame 5-1 drives the vibration motor 5-2 and the vibration plate 4 to rotate, so that the vibration plate 4 rotates to the top of the casing 2 and is flatly placed against the workbench 3, and an appropriate amount of raw materials to be processed are placed on the workbench 3, and the servo stepping unit 20 drives the scraper plate 21 to move to the right, so that the scraper plate 21 scrapes the raw materials on the workbench 3 into the vibration plate 4, and as the scraper plate 21 moves to the right, the raw materials in the hanging plate are smoothed, and then the scraper plate 21 is reset, and the vibration plate 4 is driven to vibrate by the vibration motor 5-2, so that the material in the vibration plate 4 vibrates, so that the light impurities in the material float to the surface, and then the stepping wire is used. The rod pair 12 drives the reciprocating stepping seat 11 to move, and the reciprocating stepping seat 11 drives the dust hopper 10 to reciprocate above the vibration plate 4, and the dust collector unit works, so that the light impurities on the surface of the vibration plate 4 are sucked in and screened out through the dust hopper 10; after the light materials in the vibration plate 4 are screened out, the remaining materials in the vibration plate 4 are poured out, and the support frame 5-1 is pulled downward by the supporting hydraulic rod 5-4 to rotate, and the support frame 5-1 drives the vibration plate 4 to rotate, and makes one end of the side cover plate 6-1 of the vibration plate 4 enter the interior of the casing 2 and tilt downward, and after one end of the side cover plate 6-1 on the vibration plate 4 rotates and docks with the discharge pipe 8 on the casing 2, the lifting frame 7-2 is pushed upward by the lifting hydraulic rod 7-1. The lifting frame 7-2 drives the clamping claw 7-3 and the positioning claw 15 to rise, so that the clamping sleeve 7-4 and the positioning seat 6-5 are located between the clamping claw 7-3 and the positioning claw 15, and then the clamping hydraulic rod 7-5 pushes the clamping claw 7-3, so that the transmission is carried out through the spur gear 16, and the spur gear 16 cooperates with the spur racks 17 on the clamping claw 7-3 and the positioning claw 15 respectively, so that the clamping claw 7-3 moves and drives the positioning claw 15 to move in the opposite direction so that the two are clamped, the clamping claw 7-3 moves and inserts into the clamping sleeve 7-4, the positioning claw 15 moves and presses against the positioning seat 6-5 to push the positioning seat 6-5 to move, the positioning seat 6-5 slides on the load-bearing rod 18, and the positioning seat 6-5 moves and pushes the positioning rod 6-3 in the guide sleeve 6- 2 moves, the positioning seat 6-5 drives the positioning rod 6-3 to be pulled out from the Dongweitao, at this time, the positioning seat 6-5 cooperates with the guide sleeve 6-2 to compress the support spring 13, that is, after the positioning rod 6-3 is separated from the positioning sleeve 6-4, the lifting frame 7-2 is pulled downward by the lifting hydraulic rod 7-1, and the lifting frame 7-2 moves downward and hooks the clamping sleeve 7-4 through the clamping claw 7-3, thereby driving the measuring end cover to move downward, and the measuring end cover is removed from the port of the vibration disk 4, and then the vibration motor 5-2 drives the vibration disk 4 to move, and the material in the vibration disk 4 is poured out from the discharge pipe 8, then the side cover 6-1 is reset and the clamping claw 7-3 is loosened to allow the positioning rod 6-3 to be inserted into the positioning sleeve 6-4, and the vibration disk 4 is rotated upward to reset.

[0055] Compared with the prior art, the present invention has the following beneficial effects:

[0056] 1. By arranging a vibrating bowl 4 and installing a dust suction hopper 10 above the vibrating bowl 4, after putting raw materials into the vibrating bowl 4, the raw materials are vibrated to make the light impurities in the raw materials vibrate and float upward. Then, the dust suction hopper 10 is connected to a vacuum cleaner, and through the reciprocating movement of the dust suction hopper 10 above the vibrating bowl 4, the light impurities in the raw materials are screened out.

[0057] 2. The vibrating bowl 4 of the device is arranged on a support frame 5-1 that can be rotated to lift and lower. A side cover plate 6-1 is arranged at one end of the outlet of the vibrating bowl, and a positioning rod 6-3 and a positioning sleeve 6-4 are arranged to cooperate to position the side cover plate 6-1 on the vibrating bowl 4. Accordingly, clamping claws 7-3 and positioning claws 15 are arranged on the frame 1 to remove the side cover plate 6-1 when the vibrating bowl 4 discharges materials.

[0058] For those skilled in the art, they can modify the technical solutions recorded in the foregoing embodiments and make equivalent replacements for some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A modified nylon masterbatch screening device with multi-stage screening, comprising a frame (1), a casing (2), and a workbench (3), wherein the frame (1) is fixedly arranged on the inner wall of the casing (2), and the workbench (3) is fixedly arranged on the frame (1); characterized in that: It also contains: A vibration plate (4), wherein the vibration plate (4) is arranged on the side of the workbench (3); A supporting mechanism (5), wherein the supporting mechanism (5) is arranged on the workbench (3), and the vibrating plate (4) is arranged on the supporting mechanism (5); An opening and closing mechanism (6), wherein the opening and closing mechanism (6) is arranged on the vibration plate (4); A driving mechanism (7), wherein the driving mechanism (7) is arranged on the frame (1), and the driving mechanism (7) is matched with the opening and closing mechanism (6); A discharge pipe (8), wherein the discharge pipe (8) is passed through and fixed on a side plate of the casing (2).

2. The modified nylon masterbatch screening device with multi-stage screening according to claim 1, characterized in that: A mounting frame (9) is arranged outside the casing (2), the upper end of the casing (2) is fixedly arranged on the mounting frame (9), a dust hopper (10) is arranged above the vibration plate (4), and the dust hopper (10) is connected to the vacuum cleaner device through a pipeline, a reciprocating stepping seat (11) is fixedly arranged on the outer wall of the dust hopper (10), a stepping screw pair (12) is fixedly arranged on the mounting frame (9), and the reciprocating stepping seat (11) is fixedly arranged on the moving unit of the stepping screw pair (12).

3. The modified nylon masterbatch screening device with multi-stage screening according to claim 1, characterized in that: The supporting mechanism (5) comprises: A support frame (5-1), wherein the support frame (5-1) is rotatably mounted on the frame (1) via a rotating shaft, and the support frame (5-1) is arranged inside the casing (2); A vibration motor (5-2), wherein the vibration motor (5-2) is fixedly arranged on the support frame (5-1), and the vibration plate (4) is fixedly arranged on the output shaft of the vibration motor (5-2); A connecting shaft (5-3), wherein the connecting shaft (5-3) is fixedly arranged on the supporting frame (5-1); A supporting hydraulic rod (5-4) is rotatably mounted on the frame (1) via a rotating shaft, a connecting sleeve (5-5) is fixedly mounted on the output shaft of the supporting hydraulic rod (5-4), and the output shaft of the supporting hydraulic rod (5-4) is rotatably mounted on the connecting shaft (5-3) via the connecting sleeve (5-5).

4. The modified nylon masterbatch screening device with multi-stage screening according to claim 1, characterized in that: The opening and closing mechanism (6) comprises: A side cover plate (6-1) is provided at an end opening of the vibration plate (4) away from the workbench (3), the side cover plate (6-1) is provided to cover the side port of the vibration plate (4), the bottom plate of the side cover plate (6-1) is abutted against the lower side wall of the vibration plate (4), and the side plate of the side cover plate (6-1) is sandwiched between the vibration plate (4) and the side plate of the casing (2); A guide sleeve (6-2), wherein the guide sleeve (6-2) is fixedly arranged on the lower side wall of the side cover plate (6-1); A positioning rod (6-3), wherein the positioning rod (6-3) is movably inserted into the guide sleeve (6-2); A positioning sleeve (6-4), wherein the positioning sleeve (6-4) is fixedly arranged on the lower side wall of the vibration plate (4), and the positioning rod (6-3) is movably inserted into the positioning sleeve (6-4); A positioning seat (6-5) is arranged between the guide sleeve (6-2) and the positioning sleeve (6-4), and a positioning rod (6-3) is fixedly arranged on the positioning seat (6-5).

5. The modified nylon masterbatch screening device with multi-stage screening according to claim 4, characterized in that: The positioning rod (6-3) is sleeved with a support spring (13), and the support spring (13) is arranged between the guide sleeve (6-2) and the positioning seat (6-5).

6. The modified nylon masterbatch screening device with multi-stage screening according to claim 4, characterized in that: The driving mechanism (7) comprises: A lifting hydraulic rod (7-1), wherein the lifting hydraulic rod (7-1) is fixedly arranged on the frame (1), and the lifting hydraulic rod (7-1) is arranged below the vibration plate (4); A lifting frame (7-2), wherein the lifting frame (7-2) is fixedly arranged on the output shaft of the lifting hydraulic rod (7-1); A clamping claw (7-3), wherein the clamping claw (7-3) is movably mounted in the lifting frame (7-2); A clamping sleeve (7-4), wherein the clamping sleeve (7-4) is fixedly arranged on the lower surface of the side cover plate (6-1), and the clamping claw (7-3) is arranged in cooperation with the clamping sleeve (7-4); A clamping hydraulic rod (7-5) is fixedly arranged on the lifting frame (7-2), and an output shaft of the clamping hydraulic rod (7-5) is fixedly arranged on the clamping claw (7-3).

7. The modified nylon masterbatch screening device with multi-stage screening according to claim 6, characterized in that: The clamping claw (7-3) is fixedly provided with a guide rod (14), a positioning claw (15) is movably sleeved on the guide rod (14), a spur gear (16) is rotatably provided on the lifting frame (7-2) through a rotating shaft, and the spur gear (16) is arranged between the clamping claw (7-3) and the positioning claw (15), two spur racks (17) are respectively meshed and arranged on both sides of the spur gear (16), and the two spur racks (17) are respectively fixedly provided on the clamping claw (7-3) and the positioning claw (15).

8. The modified nylon masterbatch screening device with multi-stage screening according to claim 7, characterized in that: The upper cover of the clamping sleeve (7-4) is fixedly provided with a load-bearing rod (18), one end of the load-bearing rod (18) away from the clamping sleeve (7-4) is fixedly provided on the side cover plate (6-1), and the positioning seat (6-5) is movably sleeved on the load-bearing rod (18).

9. The modified nylon masterbatch screening device with multi-stage screening according to claim 1, characterized in that: A stepping slide rail (19) is fixedly arranged on the mounting frame (9), a servo stepping unit (20) is slidably mounted on the stepping slide rail (19), a scraper plate (21) is fixedly arranged on the servo stepping unit (20), and the lower side of the scraper plate (21) is movably arranged on the upper surface of the workbench (3).

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