Matched traction roller assembly of sheet extruder

Abstract

The utility model belongs to the technical field of sheet extrusion, and particularly relates to a matched traction roller assembly of a sheet extruder, which comprises a fixed table, two groups of hydraulic cylinders are fixedly connected to the top of the fixed table; the group of hydraulic cylinders are symmetrically arranged; the two groups of hydraulic cylinders are symmetrically arranged; the output ends of the pair of hydraulic cylinders are fixedly connected with the same second fixing block. A pair of first fixing blocks are fixedly connected to the top of the fixing table and are symmetrically arranged; one first fixing block is arranged between the pair of hydraulic cylinders; through the arrangement of a hydraulic cylinder, a first fixing block and a second fixing block, the space adjustment difficulty between a second traction roller and a first traction roller can be effectively reduced, and the situation that when the whole device needs to pull sheets with different thicknesses, due to the fact that an adjustment assembly is not comprehensive in arrangement, the adjustment assembly is not comprehensive is effectively reduced; therefore, adjustment is difficult, sheets with different thicknesses are difficult to pull, and rubber rollers with different sizes need to be replaced, so that the working efficiency is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of sheet extrusion, in particular to a matching traction roller assembly of a sheet extruder. Background Art

[0002] Sheet extruder is a plastic processing equipment, mainly used to produce plastic sheets. It usually heats and pressurizes the raw materials through the rotation and advancement of the screw, plasticizes, mixes, and extrude them, and then forms the desired shape through a mold before extrusion.

[0003] In the prior art, the traction rollers of a sheet extruder usually use a plurality of rollers to traction and stretch the extruded sheet so that the sheet reaches the desired thickness and flatness.

[0004] During long-term use and observation, it was found that the traction roller assemblies of most sheet extruders were not fully adjusted when the rollers were traction, which led to increased difficulty in traction of sheets of different thicknesses.

[0005] To this end, the utility model provides a matching traction roller assembly for a sheet extruder. Utility Model Content

[0006] In order to make up for the deficiencies of the prior art and solve at least one problem raised in the background technology, a matching traction roller assembly for a sheet extruder is proposed.

[0007] The technical solution adopted by the utility model to solve its technical problems is: the utility model is a matching traction roller assembly of a sheet extruder, comprising a fixed platform; two groups of hydraulic cylinders are fixedly connected to the top of the fixed platform; one group of hydraulic cylinders is symmetrically arranged; the two groups of hydraulic cylinders are symmetrically arranged; a pair of hydraulic cylinder output ends are fixedly connected to the same second fixed block; a pair of first fixed blocks are fixedly connected to the top of the fixed platform, and are symmetrically arranged; one of the first fixed blocks is arranged between the pair of hydraulic cylinders; a second motor is fixedly connected to the side wall of one of the first fixed blocks away from the other first fixed block; a first motor is fixedly connected to the side wall of one of the second fixed blocks away from the other second fixed block; the second motor output A first traction roller is fixedly connected to the output end, and the first traction roller is installed between a pair of first fixed blocks and is rotatably matched; a second traction roller is fixedly connected to the output end of the first motor, and the second traction roller is installed between a pair of second fixed blocks and is rotatably matched; the arrangement of the hydraulic cylinder, the first fixed block and the second fixed block can effectively reduce the difficulty of adjusting the space between the second traction roller and the first traction roller, and effectively reduce the probability of adjustment difficulties, difficulty in traction of sheets of different thicknesses, and need to replace rubber rollers of different sizes when the device as a whole needs to pull sheets of different thicknesses due to incomplete adjustment components, thereby effectively improving the overall stability of the device.

[0008] Preferably, a third motor is fixedly connected to the side wall of the fixed platform; a first slide groove is opened in the middle of the fixed platform; a screw is fixedly connected to the output end of the third motor; the screw and the first slide groove are rotatably matched; the thread of the screw is arranged opposite to the thread in the first slide groove; the screw is connected to a pair of sliders through a screw nut pair; the top of a pair of sliders is fixedly connected to a first limit plate; the first limit plate is arranged on the side walls of the first fixed block close to each other, and is slidably matched with the first traction roller; a pair of second slide grooves are opened on both sides of the first limit plate; a pair of second slide grooves are slidably connected to a slide rod; the top of a pair of slide rods is fixedly connected to the same second limit plate; the second limit plate and the second traction roller are slidably matched; the arrangement of a pair of first limit plates and a pair of second limit plates can effectively limit the sheet being towed. , effectively reducing the probability of problems such as sheet position deviation and side curling caused by incomplete limit settings when the device as a whole is pulling the sheet, effectively enhancing the overall stability of the device, and at the same time, the first limit plate and the second limit plate can be effectively moved through the settings of the third motor, the screw, and the slider, so that the first limit plate and the second limit plate can limit sheets of different widths, effectively reducing the probability of difficulty in limiting the sheet when sheets of different widths need to be limited because it is difficult to move the first limit plate and the second limit plate, further improving the overall usability of the device, and at the same time, the second limit plate can be effectively moved up and down with the second traction roller through the settings of the slide rod and the second slide groove, further improving the overall usability of the device.

[0009] Preferably, a wind cavity is fixedly connected to the side walls on the same side of the first limiting plate and the second limiting plate; a pair of wind cavities are provided with a guide cavity in the middle part; a pair of wind cavities are provided with the same air duct in the middle part near the end part; the air duct and the guide cavity are connected with each other; an air inlet is fixedly connected to the middle part of the air duct; the air inlet and the air duct are connected with each other; a pair of wind cavities are provided with air outlet grooves on the side walls close to each other; the air outlet grooves and the guide cavity are connected with each other; the air outlet grooves are inclined and the output end is arranged away from the first limiting plate; the arrangement of the wind cavity, the air duct, the air inlet, the air outlet groove and the guide cavity can effectively reduce the probability of the sheet being scratched by impurities or defects when being pulled by the first traction roller and the second traction roller due to external impurities attached to the surface during traction, thereby effectively enhancing the overall reliability of the device.

[0010] Preferably, the side walls of the wind cavity that are close to each other are fixed with a third fixed block; the third fixed block is arranged at a position close to the first limit plate; a pair of side walls of the third fixed blocks that are close to each other are fixed with multiple groups of bristles; the arrangement of the third fixed block and the bristles can further reduce the probability of the sheet being scratched by impurities or having defects when being pulled by the first traction roller and the second traction roller due to external impurities attached to the surface during traction, thereby further enhancing the overall reliability of the device.

[0011] Preferably, a heating wire is fixedly connected to the inner wall of the air cavity; the heating wire is arranged in the middle of the guide cavity; the arrangement of the heating wire can effectively insulate the sheet material, effectively reducing the probability of cracking due to excessive cooling of the sheet material due to incomplete insulation settings, thereby further improving the overall stability of the device.

[0012] Preferably, a scraper is fixedly connected to the middle of the first limit plate and the second limit plate; the scraper is arranged at an angle and is oriented to be close to the adjacent second fixed block; the arrangement of the scraper can enable the device as a whole to clean impurities on the surface of the first traction roller and the second traction roller when the sheet is not being pulled, thereby effectively reducing the probability of the sheet being scratched by impurities attached to the surface of the first traction roller and the second traction roller due to long-term use, and also effectively increasing the service life of the first traction roller and the second traction roller.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. The utility model discloses a matching traction roller assembly for a sheet extruder, which can effectively reduce the difficulty of adjusting the space between the second traction roller and the first traction roller by arranging a hydraulic cylinder, a first fixed block and a second fixed block, and effectively reduces the probability of the occurrence of difficulties in adjustment and traction of sheets of different thicknesses due to incomplete adjustment assembly arrangement when the device as a whole needs to pull sheets of different thicknesses, and the need to replace rubber rollers of different sizes, thereby reducing work efficiency, and effectively improves the overall stability of the device.

[0015] 2. The utility model discloses a matching traction roller assembly for a sheet extruder, which can effectively limit the sheet being towed by setting a pair of first limit plates and a pair of second limit plates, effectively reducing the probability of problems such as sheet position deviation and side curling caused by incomplete limit settings when the device as a whole is towing the sheet, effectively enhancing the overall stability of the device, and at the same time, the first limit plate and the second limit plate can be effectively moved by setting a third motor, a screw rod, and a slider, so that the first limit plate and the second limit plate can limit sheets of different widths, effectively reducing the probability of a situation in which it is difficult to limit the sheet when sheets of different widths need to be limited because it is difficult to move the first limit plate and the second limit plate, further improving the overall usability of the device, and at the same time, the second limit plate can be effectively moved up and down with the second traction roller by setting the slide bar and the second slide groove, further improving the overall usability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a three-dimensional diagram of the fixed platform in the utility model;

[0018] Figure 2 It is a cross-sectional view of the fixed platform in the utility model;

[0019] Figure 3 It is a structural schematic diagram of the third motor and the slider in the utility model;

[0020] Figure 4 It is a structural schematic diagram of the first limiting plate and the second limiting plate in the utility model;

[0021] Figure 5 It is a schematic diagram of the structure of the stroke cavity and the heating wire of the utility model;

[0022] Figure 6 It is a cross-sectional view of the stroke cavity of the utility model;

[0023] Legend:

[0024] 1. Fixed table; 11. Hydraulic cylinder; 12. First fixed block; 13. First motor; 14. Second motor; 15. First traction roller; 16. Second fixed block; 17. Second traction roller; 2. First limit plate; 21. Slide bar; 22. Second limit plate; 23. Third motor; 24. Screw; 25. Slider; 26. First slide slot; 27. Second slide slot; 3. Air cavity; 31. Air duct; 32. Air inlet; 33. Air outlet slot; 34. Guide cavity; 4. Third fixed block; 41. Brush; 5. Heating wire; 6. Scraper; 7. Corrugated cover. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Specific examples are given below.

[0027] like Figures 1 to 6 As shown, a matching traction roller assembly of a sheet extruder described in an embodiment of the utility model includes a fixed platform 1; two groups of hydraulic cylinders 11 are fixedly connected to the top of the fixed platform 1; one group of hydraulic cylinders 11 are symmetrically arranged; the two groups of hydraulic cylinders 11 are symmetrically arranged; a pair of the hydraulic cylinders 11 output ends are fixedly connected to the same second fixed block 16; a pair of first fixed blocks 12 are fixedly connected to the top of the fixed platform 1, and are symmetrically arranged; one of the first fixed blocks 12 is arranged between the pair of hydraulic cylinders 11; a second motor 14 is fixedly connected to the side wall of one of the first fixed blocks 12 away from the other first fixed block 12; a first motor 13 is fixedly connected to the side wall of one of the second fixed blocks 16 away from the other second fixed block 16; a first traction roller 15 is fixedly connected to the output end of the second motor 14, and the first traction roller 15 is installed between the pair of first fixed blocks 12, and is rotatably matched; a second traction roller 17 is fixedly connected to the output end of the first motor 13, and the second traction roller 17 is installed between the pair of second fixed blocks 16, and is rotatably matched; when working, the power supply of the hydraulic cylinder 11 is first started to start The second fixed block 16 is pushed to move upward, and the space between the second traction roller 17 and the first traction roller 15 becomes larger. At this time, the sheet is placed between the second traction roller 17 and the first traction roller 15, and then the power supply of the hydraulic cylinder 11 is started again to drive the second fixed block 16 to start moving downward, until the space between the second traction roller 17 and the first traction roller 15 reaches the required size, and then the power supply of the hydraulic cylinder 11 is turned off. At this time, the power supplies of the first motor 13 and the second motor 14 are turned on to drive the second traction roller 17 and the first traction roller 15 to start rotating, so as to achieve the purpose of traction of sheets of different thicknesses. The arrangement of the hydraulic cylinder 11, the first fixed block 12, and the second fixed block 16 can effectively reduce the difficulty of adjusting the space between the second traction roller 17 and the first traction roller 15, and effectively reduce the probability of the occurrence of things such as difficulty in adjustment, difficulty in traction of sheets of different thicknesses, and need to replace rubber rollers of different sizes when the device as a whole needs to traction sheets of different thicknesses due to the incomplete arrangement of the adjustment components, thereby reducing the work efficiency, and effectively improving the overall stability of the device.

[0028] like Figure 3 and Figure 4 As shown, a third motor 23 is fixedly connected to the side wall of the fixed platform 1; a first slide groove 26 is provided in the middle of the fixed platform 1; a screw 24 is fixedly connected to the output end of the third motor 23; the screw 24 and the first slide groove 26 are rotationally matched; the thread of the screw 24 is arranged opposite to the thread in the first slide groove 26; the screw 24 is connected to a pair of sliders 25 through a screw nut pair; the tops of the pair of sliders 25 are fixedly connected to a first limit plate 2; the first limit plate 2 is arranged at the side walls of the first fixed block 12 close to each other, and is slidingly matched with the first traction roller 15; a pair of second slide grooves 27 are provided on both sides of the first limit plate 2; a pair of the second slide grooves 27 are provided on both sides of the first limit plate 2 27 are all slidably connected with a slide bar 21; a pair of the slide bars 21 are fixedly connected with the same second limit plate 22 on the top; the second limit plate 22 and the second traction roller 17 are slidably matched; when working, when it is necessary to pull sheets of different widths, the sheet can be placed between the second traction roller 17 and the first traction roller 15, and then the power supply of the third motor 23 is started, at this time the third motor 23 will drive the screw rod 24 to start rotating, and then the screw rod 24 will drive a pair of sliders 25 to move closer or farther from each other through the screw nut pair, at this time the slider 25 will sequentially drive the first limit plate 2, the slide bar 21, and the second limit plate 22 to move together, when the first limit plate 2 and the second limit After the positioning plates 22 are against the two sides of the sheet, the power supply of the third motor 23 can be stopped to achieve the function of limiting the sheets of different widths. At the same time, when the hydraulic cylinder 11 drives the second fixed block 16 to move up and down, the sliding rod 21 will slide inside the second sliding groove 27 to achieve the limiting effect on the second limiting plate 22. The setting of a pair of first limiting plates 2 and a pair of second limiting plates 22 can effectively limit the sheet being towed, effectively reducing the probability of sheet position deviation and side curling caused by incomplete limiting settings when the device as a whole is towing the sheet, effectively enhancing the overall stability of the device, and at the same time, through the third limiting plate 22, the second limiting plate 22 can effectively limit the sheet being towed. The arrangement of the three motors 23, the screw 24 and the slider 25 can effectively move the first limit plate 2 and the second limit plate 22, so that the first limit plate 2 and the second limit plate 22 can limit the sheets of different widths, effectively reducing the probability of difficulty in limiting the sheets when it is necessary to limit the sheets of different widths due to the difficulty in moving the first limit plate 2 and the second limit plate 22, further improving the overall usability of the device, and at the same time, through the arrangement of the slide bar 21 and the second slide groove 27, the second limit plate 22 can be effectively moved up and down with the second traction roller 17, further improving the overall usability of the device.

[0029] like Figure 5 and Figure 6As shown, the side walls on the same side of the first limiting plate 2 and the second limiting plate 22 are fixedly connected with an air cavity 3; a pair of the air cavities 3 are provided with a guide cavity 34 in the middle; a pair of the air cavities 3 are provided with a same air duct 31 in the middle near the end; the air duct 31 and the guide cavity 34 are communicated with each other; an air inlet 32 ​​is fixedly connected to the middle of the air duct 31; the air inlet 32 ​​and the air duct 31 are communicated with each other; an air outlet slot 33 is provided at the side walls of the pair of air cavities 3 close to each other; the air outlet slot 33 and the guide cavity 34 are communicated with each other; the air outlet slot 33 is inclined, and the output end is arranged away from the first limiting plate 2; when working, the sheet can first pass through the pair of air cavities 3, and then be placed between the first traction roller 15 and the second traction roller 17, and then the pre-prepared air pump can be put into the air duct 31. Connect the air inlet 32 ​​and turn on the power to allow air to flow into the air duct 31. At this time, the airflow will enter the guide cavity 34 through the air duct 31, and then be ejected from the air outlet slot 33. At this time, the ejected airflow will play a role in blowing off impurities on the surface of the sheet. At the same time, when the second limiting plate 22 moves up and down, it can also drive the air cavity 3 fixed to it to move, so as to achieve the purpose of blowing out impurities from sheets of different thicknesses. The arrangement of the air cavity 3, air duct 31, air inlet 32, air outlet slot 33, and guide cavity 34 can effectively reduce the probability of the sheet being scratched by impurities or defects when being pulled by the first traction roller 15 and the second traction roller 17 due to external impurities attached to the surface during traction, thereby effectively enhancing the overall reliability of the device.

[0030] like Figure 5 and Figure 6 As shown, the side walls of the air cavity 3 that are close to each other are fixed with a third fixed block 4; the third fixed block 4 is arranged at a position close to the first limit plate 2; a pair of side walls of the third fixed blocks 4 that are close to each other are fixed with multiple groups of bristles 41; when the device as a whole is pulling the sheet material during operation, the bristles 41 will automatically play the function of sweeping away impurities on the surface of the sheet material, so as to achieve the purpose of reducing the adhesion of impurities to the surface of the sheet material. The arrangement of the third fixed block 4 and the bristles 41 can further reduce the probability of the sheet material being scratched by impurities or having defects when being pulled by the first traction roller 15 and the second traction roller 17 due to external impurities attached to the surface during traction, thereby further enhancing the overall reliability of the device.

[0031] like Figure 5As shown, the inner wall of the air cavity 3 is fixedly connected with an electric heating wire 5; the electric heating wire 5 is arranged in the middle of the guide cavity 34; when working, when the airflow passes through the guide cavity 34 and is ejected from the air outlet slot 33, the power of the electric heating wire 5 can be turned on, and the electric heating wire 5 will begin to generate heat and heat up the airflow passing through, so that the air outlet slot 33 ejects hot air to achieve the purpose of keeping the sheet material warm. The setting of the electric heating wire 5 can effectively keep the sheet material warm, effectively reducing the probability of cracking caused by excessive cooling of the sheet material due to incomplete insulation setting, thereby further improving the overall stability of the device.

[0032] like Figure 3 and Figure 4 As shown, a scraper 6 is fixedly connected to the middle of the first limit plate 2 and the second limit plate 22; the scraper 6 is inclined and is oriented to be close to the adjacent second fixed block 16; when the first limit plate 2 and the second limit plate 22 are moving during operation, the scraper 6 can scrape off the impurities on the surfaces of the first traction roller 15 and the second traction roller 17 by itself, so as to achieve the purpose of reducing the impurities on the surfaces of the first traction roller 15 and the second traction roller 17. Through the arrangement of the scraper 6, the device as a whole can clean the impurities on the surfaces of the first traction roller 15 and the second traction roller 17 when the sheet is not being pulled, effectively reducing the probability of the sheet being scratched due to impurities attached to the surfaces of the first traction roller 15 and the second traction roller 17 due to long-term use, and also effectively increasing the service life of the first traction roller 15 and the second traction roller 17.

[0033] like Figure 1 As shown, a bellows cover 7 is detachably installed in the middle of the first slide groove 26; the bellows cover 7 is arranged between a pair of first limit plates 2; when working, the bellows cover 7 can automatically reduce the function of reducing the entry of external impurities into the first slide groove 26. The setting of the bellows cover 7 can effectively reduce the probability of external impurities entering the first slide groove 26, and effectively reduce the probability of abnormal operation of the screw 24 due to external impurities entering the first slide groove 26, thereby further enhancing the overall stability of the device.

[0034] The scraper 6 is made of hard rubber material.

[0035] Working principle: when working, first start the power supply of the hydraulic cylinder 11 to start it so that it pushes the second fixed block 16 to move upward. At this time, the space between the second traction roller 17 and the first traction roller 15 becomes larger. At this time, the sheet is placed between the second traction roller 17 and the first traction roller 15, and then the power supply of the hydraulic cylinder 11 is started again to drive the second fixed block 16 to start moving downward until the space between the second traction roller 17 and the first traction roller 15 reaches the required size, then turn off the power supply of the hydraulic cylinder 11, and at this time turn on the power supply of the first motor 13 and the second motor 14 to drive the second traction roller 17 and the first traction roller 15 to start rotating, so as to achieve the purpose of traction of sheets of different thicknesses. When traction is required, When guiding sheets of different widths, the sheet can be placed between the second traction roller 17 and the first traction roller 15 first, and then the power supply of the third motor 23 is started. At this time, the third motor 23 will drive the screw rod 24 to start rotating, and then the screw rod 24 will drive a pair of sliders 25 to move closer to or away from each other through the screw nut pair. At this time, the slider 25 will sequentially drive the first limit plate 2, the slide bar 21, and the second limit plate 22 to move together. When the first limit plate 2 and the second limit plate 22 are against both sides of the sheet, the power supply of the third motor 23 can be stopped to achieve the effect of limiting sheets of different widths. At the same time, when the hydraulic cylinder 11 drives the second fixed block 16 to move up and down, the slide bar 21 will be on the second slide The groove 27 slides inside to achieve the limiting effect on the second limiting plate 22. The sheet can first pass through a pair of air chambers 3 and then be placed between the first traction roller 15 and the second traction roller 17. Then the pre-prepared air pump is connected to the air inlet 32 ​​and the power is turned on to let air into the air duct 31. At this time, the air flow will enter the guide cavity 34 through the air duct 31 and then be ejected from the air outlet groove 33. At this time, the ejected air flow will play a role in blowing off impurities on the surface of the sheet. At the same time, when the second limiting plate 22 moves up and down, it can also drive the air chamber 3 fixed thereto to move, so as to achieve the purpose of blowing impurities off sheets of different thicknesses. When the device as a whole pulls the sheet, the bristles 41 It will automatically play the function of sweeping away impurities on the surface of the sheet to achieve the purpose of reducing the attachment of impurities to the surface of the sheet. When the airflow passes through the guide cavity 34 and is ejected from the air outlet slot 33, the power of the heating wire 5 can be turned on. At this time, the heating wire 5 will begin to heat up and heat up the passing airflow, so that the air outlet slot 33 ejects hot air to achieve the purpose of keeping the sheet warm. When the first limiting plate 2 and the second limiting plate 22 are moving, the scraper 6 can automatically scrape away impurities on the surface of the first traction roller 15 and the second traction roller 17 to achieve the purpose of reducing impurities on the surface of the first traction roller 15 and the second traction roller 17. The corrugated cover 7 can automatically play the function of reducing external impurities from entering the first slide slot 26.

[0036] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A traction roller assembly for a sheet extruder, comprising a fixed platform (1); characterized in that: Two groups of hydraulic cylinders (11) are fixedly connected to the top of the fixed platform (1); one group of hydraulic cylinders (11) is symmetrically arranged; the two groups of hydraulic cylinders (11) are symmetrically arranged; the output ends of a pair of hydraulic cylinders (11) are fixedly connected to the same second fixed block (16); a pair of first fixed blocks (12) are fixedly connected to the top of the fixed platform (1) and are symmetrically arranged; one of the first fixed blocks (12) is arranged between the pair of hydraulic cylinders (11); one of the first fixed blocks (12) is away from the other first fixed block (12); A second motor (14) is fixedly connected to the side wall; a first motor (13) is fixedly connected to the side wall of one of the second fixed blocks (16) away from the other second fixed block (16); a first traction roller (15) is fixedly connected to the output end of the second motor (14), and the first traction roller (15) is installed between a pair of first fixed blocks (12) and is rotatably matched; a second traction roller (17) is fixedly connected to the output end of the first motor (13), and the second traction roller (17) is installed between the pair of second fixed blocks (16) and is rotatably matched.

2. The matching traction roller assembly of a sheet extruder according to claim 1, characterized in that: The side wall of the fixed platform (1) is fixedly connected to a third motor (23); a first slide groove (26) is provided in the middle of the fixed platform (1); a screw rod (24) is fixedly connected to the output end of the third motor (23); the screw rod (24) and the first slide groove (26) are rotationally matched; the thread of the screw rod (24) is arranged opposite to the thread in the first slide groove (26); the screw rod (24) is connected to a pair of sliders (25) through a screw nut pair; the tops of the pair of sliders (25) are fixedly connected to ... A limit plate (2); the first limit plate (2) is arranged at the side wall of the first fixed block (12) close to each other, and is in sliding cooperation with the first traction roller (15); a pair of second slide grooves (27) are provided on both sides of the first limit plate (2); the pair of second slide grooves (27) are both slidably connected to a slide rod (21); the top of the pair of slide rods (21) is fixedly connected to the same second limit plate (22); the second limit plate (22) is in sliding cooperation with the second traction roller (17).

3. The matching traction roller assembly of a sheet extruder according to claim 2, characterized in that: The side walls on the same side of the first limiting plate (2) and the second limiting plate (22) are both fixedly connected with an air cavity (3); a guide cavity (34) is provided in the middle of a pair of the air cavities (3); a same air duct (31) is installed in the middle of a pair of the air cavities (3) near the end; the air duct (31) and the guide cavity (34) are interconnected; an air inlet (32) is fixedly connected in the middle of the air duct (31); the air inlet (32) and the air duct (31) are interconnected; an air outlet groove (33) is provided at the side walls of the pair of the air cavities (3) near each other; the air outlet groove (33) and the guide cavity (34) are interconnected; the air outlet groove (33) is arranged obliquely, and the output end is arranged away from the first limiting plate (2).

4. The matching traction roller assembly of a sheet extruder according to claim 3, characterized in that: The side walls of the air cavity (3) close to each other are fixedly connected to a third fixing block (4); the third fixing block (4) is arranged at a position close to the first limiting plate (2); and a pair of side walls of the third fixing blocks (4) close to each other are fixedly connected to a plurality of groups of bristles (41).

5. The matching traction roller assembly of a sheet extruder according to claim 4, characterized in that: An electric heating wire (5) is fixedly connected to the inner wall of the air cavity (3); the electric heating wire (5) is arranged in the middle of the flow guide cavity (34).

6. The matching traction roller assembly of a sheet extruder according to claim 5, characterized in that: A scraper (6) is fixedly connected to the middle of each of the first limiting plate (2) and the second limiting plate (22); the scraper (6) is arranged in an inclined manner and is arranged close to an adjacent second fixed block (16).

7. The matching traction roller assembly of a sheet extruder according to claim 6, characterized in that: A corrugated cover (7) is detachably mounted in the middle of the first sliding groove (26); the corrugated cover (7) is arranged between a pair of first limiting plates (2).

8. The matching traction roller assembly of a sheet extruder according to claim 7, characterized in that: The scraper (6) is made of hard rubber material.

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