Laminating co-extrusion device for composite paper

Abstract

The utility model discloses a lamination co-extrusion device for composite paper, which comprises a lamination component, a co-extrusion component, a film pressing component, a film pressing component and a film pressing component, wherein the lamination component comprises a die head, a screw conveyor and a stock bin; the co-extrusion assembly comprises a co-extrusion frame, a first clamping roller and two second clamping rollers, and the two second clamping rollers are arranged on the two sides of the first clamping roller correspondingly; the translation assembly drives the co-extrusion frame and the die head to move relatively; and the material guiding assembly is used for guiding and switching the conveying paths of the paper, the number of the conveying paths of the paper is two, and the two faces of the paper under the two conveying paths are connected with the film material output by the die head correspondingly. According to the lamination co-extrusion device for the composite paper, the co-extrusion frame and the die head are driven by the translation assembly to generate relative displacement, so that the die head can face a gap between the first clamping roller and one of the second clamping rollers, the paper is guided in cooperation with the material guiding assembly, the paper conveying path is changed, and any face of the paper is connected with a film material output by the die head in a co-extrusion mode; therefore, different types of coated paper can be produced, and different production requirements are met.

Description

Technical Field

[0001] This utility model relates to the field of coated paper production technology, and in particular to a coated co-extrusion device for composite paper. Background Technology

[0002] Laminated composite paper, also known as coated paper, is a paper-plastic composite material. It is formed by uniformly coating a plastic matrix (such as PE matrix) onto the surface of paper through a specific process (such as casting coating). This composite material combines the characteristics of paper and plastic, and has excellent properties such as stiffness, water resistance, and oil resistance. Therefore, it is widely used in various packaging fields.

[0003] In the production process of coated paper, the paper and the film material (usually PE film) extruded by the die head through a co-extrusion device need to be co-extruded together. In the existing technology, because the relative positions of the composite rollers and the die head of the co-extrusion device are fixed, the paper needs to pass through the first and second clamping rollers of the composite rollers along a specific path during the co-extrusion process. The paper conveying path is fixed, so that a specific side of the paper is connected to the film material. This results in a single operation mode of the co-extrusion device, and the coated paper produced is fixed and single, which cannot meet the production needs of different types of coated paper.

[0004] Therefore, it is necessary to improve the existing coating and co-extrusion equipment for composite paper. Utility Model Content

[0005] The purpose of this invention is to overcome the defects in the existing technology and provide a coating co-extrusion device with two operating modes and convenient combination of film material and any side of paper to produce different types of composite paper.

[0006] To achieve the above-mentioned technical effects, the technical solution of this utility model is: a composite paper coating and co-extrusion device, comprising:

[0007] A coating assembly, comprising a horizontal die head, a screw conveyor fixedly connected to the die head, and a hopper connected to the screw conveyor; the die head is elongated and used to output film material downwards.

[0008] A co-extrusion assembly is disposed below the die head. The co-extrusion assembly includes a co-extrusion frame, a first clamping roller, and a second clamping roller. The first clamping roller and the second clamping roller rotate around their own axis on the co-extrusion frame and their axial directions are parallel to the length direction of the die head. The first clamping roller and the second clamping roller cooperate with each other to co-extrude and connect the paper and film material passing between them. There are two second clamping rollers, which are respectively disposed on both sides of the first clamping roller.

[0009] A translation assembly drives the co-extrusion frame and the die head to move relative to each other in a horizontal direction perpendicular to the axis of the first clamping roller, so that the die head faces the gap between the first clamping roller and one of the second clamping rollers;

[0010] The material guiding component is used to guide and switch the paper transport path. There are two paper transport paths, and the two sides of the paper are respectively connected to the film material output by the die head under the two transport paths.

[0011] Preferably, in order to reduce the load on the translation component, the output end of the translation component is connected to the co-extrusion frame.

[0012] Preferably, in order to achieve smooth movement of the co-extrusion frame, the translation assembly includes a translation cylinder, a translation slide rail, and a translation sleeve. The cylinder of the translation cylinder and the translation slide rail are both fixedly installed, and their length directions are parallel to the length direction perpendicular to the first clamping roller. The piston rod of the translation cylinder is connected to the co-extrusion frame, and the translation sleeve is slidably connected to the translation slide rail and fixedly connected to the co-extrusion frame.

[0013] Preferably, to facilitate die head maintenance, the coating assembly further includes a moving unit, which drives the screw conveyor to move along a length direction parallel to the die head between the coating station and the maintenance station. In the coating station, the die head is located directly above the co-extrusion assembly. In the maintenance station, the projection of the die head on the horizontal plane is separated from the projection of the co-extrusion assembly on the horizontal plane.

[0014] Preferably, in order to guide the paper's transport path, the guiding assembly includes upper guide rollers that rotate about their own axis above both sides of the first clamping roller. Two upper guide rollers are provided above both sides of the first clamping roller, and at least one of them is located above the screw conveyor.

[0015] Preferably, to further facilitate guiding the paper transport path, the material guiding assembly also includes a lower guide roller that rotates about its own axis below the first clamping roller.

[0016] Preferably, in order to facilitate paper transport, at least two lower guide rollers are provided below the first clamping roller, and the projections of the lower guide rollers on the horizontal plane are distributed along a horizontal direction perpendicular to the axial direction of the first clamping roller.

[0017] Preferably, in order to facilitate the adjustment of the height position of each lower guide roller in order to guide the paper transport, each of the lower guide rollers is provided with a sliding seat at both ends. The sliding seat slides on the co-extrusion frame in the vertical direction and is provided with a locking component between it and the co-extrusion frame. The locking component is used to lock the sliding seat in at least two working positions.

[0018] Preferably, in order to facilitate locking the position of the sliding seat, the sliding seat is provided with a sliding insertion hole, the co-extrusion frame is provided with fixed insertion holes distributed along the vertical direction, the locking component includes a locking pin, and the sliding insertion hole is engaged with one of the fixed insertion holes through the locking pin.

[0019] Preferably, to prevent the locking pin from disengaging from the sliding seat, the locking pin and the sliding seat are magnetically connected.

[0020] In summary, compared with the prior art, the composite paper coating co-extrusion device of this utility model drives the co-extrusion frame and the die head to move relative to each other through the translation component, so that the die head can face the gap between the first clamping roller and one of the second clamping rollers. With the help of the material guiding component, the paper is guided and the paper transport path is changed. The paper can be co-extruded and connected to the film material output by the die head on any side, thereby producing different types of coated paper to meet different production needs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the first embodiment;

[0022] Figure 2 This is a structural schematic diagram of another usage state of the first embodiment;

[0023] Figure 3 This is a schematic diagram of the coating assembly in the first embodiment;

[0024] Figure 4 yes Figure 1 The structural diagram omitting the coating assembly is shown in the image.

[0025] Figure 5 yes Figure 4 Enlarged view of part A;

[0026] Figure 6 yes Figure 1 A schematic diagram of the cross-sectional structure;

[0027] Figure 7 This is a schematic diagram of the coating process in the first embodiment;

[0028] Figure 8 This is a schematic diagram of the coating production process under another mode of the first embodiment;

[0029] Figure 9 This is a schematic diagram of the connection structure between the co-extrusion frame and the lower guide roller in the second embodiment;

[0030] Figure 10 yes Figure 9 An explosion diagram;

[0031] In the diagram: 1. Coating assembly; 11. Die head; 12. Screw conveyor; 13. Hopper; 14. Moving unit; 141. Motor; 142. Gear; 143. Rack; 15. Moving seat; 16. Track; 17. Sliding frame; 2. Co-extrusion assembly; 21. Co-extrusion frame; 211. Co-extrusion vertical plate; 212. Co-extrusion support; 2121. Fixing insertion hole; 22. First clamping roller; 221. First roller seat; 23. Second clamping roller; 231. Second roller seat; 232. Second slide bar; 233. Cam shaft; 24. Third clamping roller; 241. Third roller seat; 242. Third slide bar; 25. Guide rail; 26. Connecting rod; 261. Strip opening; 27. Push-pull cylinder; 3. Translation assembly; 31. Translation cylinder; 32. Translation slide rail; 33. Translation sliding sleeve; 4. Material guiding assembly; 41. Upper guide roller; 42. Lower guide roller; 43. Sliding seat; 431. Sliding insertion hole; 44. Support plate; 45. Top plate; 5. Locking assembly; 51. Locking pin; 52. Connecting plate. Detailed Implementation

[0032] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0033] First Embodiment

[0034] like Figures 1-8 As shown, a composite paper coating and co-extrusion apparatus according to the first embodiment of this utility model includes:

[0035] The coating assembly 1 includes a horizontal die head 11, a screw conveyor 12 fixedly connected to the die head 11, and a hopper 13 connected to the screw conveyor 12. The die head 11 is elongated and used to output film material downwards.

[0036] Co-extrusion assembly 2 is located below the die head 11. The co-extrusion assembly 2 includes a co-extrusion frame 21, a first clamping roller 22, and a second clamping roller 23. The first clamping roller 22 and the second clamping roller 23 rotate around their own axis on the co-extrusion frame 21 and their axial directions are parallel to the length direction of the die head 11. The first clamping roller 22 and the second clamping roller 23 cooperate with each other to co-extrude and connect the paper and film material passing between them. There are two second clamping rollers 23, which are respectively located on both sides of the first clamping roller 22.

[0037] Translation component 3 drives co-extrusion frame 21 and die head 11 to move relative to each other in a horizontal direction perpendicular to the axis of the first clamping roller 22, so that the die head 11 is toward the gap between the first clamping roller 22 and one of the second clamping rollers 23.

[0038] The material guide component 4 is used to guide and switch the paper transport path. There are two paper transport paths, and the two sides of the paper are connected to the film material output by the die head 11 under the two transport paths.

[0039] When the device is running, the paper is guided by the material guide assembly 4 and passes between the first clamping roller 22 and one of the second clamping rollers 23. At the same time, the hopper 13 provides material (usually PE) to the screw conveyor 12. The screw conveyor 12 conveys the material to the die head 11, so that the die head 11 extrudes the film material into a film structure downward. The film material falls between the first clamping roller 22 and the second clamping roller 23. After the paper and film material are co-extruded and connected by the first clamping roller 22 and the second clamping roller 23, the co-extruded composite paper is then guided out by the material guide assembly 4.

[0040] Unlike existing technologies, in this embodiment, the translation component 3 can also drive the co-extrusion frame 21 and the die head 11 to move relative to each other, so that the die head 11 faces between the first clamping roller 22 and the other second clamping roller 23. With the assistance of the material guide component 4, the paper transport path is switched, allowing the other side of the paper to be co-extruded with the film material output from the die head 11. Therefore, compared with existing technologies, the coating co-extrusion device of this invention can adjust the relative position of the co-extrusion frame 21 and the die head 11 according to production needs, and change the paper transport path through the material guide component 4. This allows the paper to select one side to be co-extruded with the film material output from the die head 11 according to production needs, thereby forming different types of composite coated papers to meet production requirements.

[0041] A further improvement is that the output end of the translation component 3 is connected to the co-extrusion frame 21. That is, the translation component 3 drives the co-extrusion frame 21 to move in a horizontal direction perpendicular to the axis of the first clamping roller 22. Therefore, the movement of the translation component 3 does not affect the coating assembly 1, thereby reducing the power consumption of the translation component 3 when adjusting the relative position of the coating assembly 1 and the co-extrusion assembly 2.

[0042] A further improvement is that the coating assembly 1 also includes a moving unit 14, which drives the screw conveyor 12 to move along the length direction parallel to the die head 11 between the coating station and the maintenance station. In the coating station, the die head 11 is located directly above the co-extrusion assembly 2. In the maintenance station, the projection of the die head 11 on the horizontal plane is separated from the projection of the co-extrusion assembly 2 on the horizontal plane.

[0043] By setting the moving unit 14, the relative positions of the coating assembly 1 and the co-extrusion assembly 2 can be changed. When the screw conveyor 12 is in the coating station, the die head 11 extrudes the film material downwards and co-extrudes it with the paper to form a composite film. When the screw conveyor 12 is in the maintenance station, it is convenient to clean and maintain the die head 11.

[0044] Specifically, a horizontal movable seat 15 is fixed below the screw conveyor 12. A sliding frame 17 is fixed on the bottom surface of the movable seat 15, which is arranged horizontally and whose length direction is consistent with the axial direction of the first clamping roller 22. A track 16 with the same length direction is provided below the sliding frame 17. The track 16 is fixed on the ground and slides with the sliding frame 17. The moving unit 14 includes a motor 141, a gear 142 and a rack 143. The rack 143 is fixed on one of the tracks 16 and has the same length direction as the track 16. The motor 141 is fixed below the movable seat 15 and its output end is fixedly connected to the gear 142 coaxially. The gear 142 meshes with the rack 143. When the motor 141 starts, it can drive the gear 142 to rotate. Through its meshing with the rack 143 which is fixed in position, and under the sliding cooperation of the sliding frame 17 and the track 16, the moving seat 15 moves parallel to the axial direction of the first clamping roller 22, thereby driving the screw conveyor 12 and the die head 11 to translate.

[0045] In this embodiment, the co-extrusion frame 21 includes two co-extrusion vertical plates 211 distributed along the axial direction of the first clamping roller 22 and three co-extrusion supports 212 fixed below the co-extrusion vertical plates 211 and distributed in a horizontal direction perpendicular to the axial direction of the first clamping roller 22. The co-extrusion supports 212 are U-shaped and their two ends are fixedly connected to the two co-extrusion vertical plates 211 respectively to support the co-extrusion vertical plates 211.

[0046] The first clamping roller 22 is a cooling roller with an outer diameter larger than that of the second clamping roller 23, which enables the first clamping roller 22 to cool the paper and prevent the paper from sticking together during the later winding process due to continuous high temperature, thus causing product scrap. The first clamping roller 22 has a first roller seat 221 at both ends. The two first roller seats 221 are fixed to the middle of the top surface of the two co-extrusion vertical plates 211 in a one-to-one correspondence. The first clamping roller 22 rotates between the two first roller seats 221 around its own axis.

[0047] Both sides of the top surface of the vertical plate 211 are provided with guide rails 25 that slope downwards towards the top center. A second slide bar 232 and a third slide bar 242 are slidably fitted on the guide rails 25. The third slide bar 242 is located above and to the side of the second slide bar 232. A second roller seat 231 and a third roller seat 241 are respectively fixed above the second slide bar 232 and the third slide bar 242. The second clamping roller 23 rotates around its own axis between the two second roller seats 231. Between the two directly opposite third roller seats 241, a guide rail is provided that rotates around its own axis. The third clamping roller 24 rotates along the axis of the body; a connecting rod 26 is provided between the second roller seat 231 and the third roller seat 241, and a strip-shaped opening 261 with the same length direction as itself is provided on the connecting rod 26. The connecting rod 26 is fixedly connected to the third roller seat 241. A convex shaft 233 passing through the inside of the strip-shaped opening 261 is also fixed on the second roller seat 231. Push-pull cylinders 27 are provided at both ends of the co-extrusion vertical plate 211. The cylinder of the push-pull cylinder 27 is connected to the co-extrusion vertical plate 271, and the piston rod is connected to the third roller seat 241.

[0048] With the above structure, the piston rod of the push-pull cylinder 27 extends outward, allowing the third roller seat 241 to move stably downward under the sliding cooperation of the third slide bar 242 and the guide rail 25. This pushes the second roller seat 231 to move stably downward under the sliding cooperation of the second slide bar 232 and the guide rail 25, so that the second clamping roller 23 is clamped between the first clamping roller 22 and the third clamping roller 24. The third clamping roller 24 applies pressure to the second clamping roller 23, and the second clamping roller 23 transmits the pressure. When the paper and film form a composite layer between the first clamping roller 22 and the second clamping roller 23, the first clamping roller 22 and the second clamping roller 23 can apply extrusion force from both sides of the composite layer to ensure the co-extrusion bonding strength and prevent the film from delaminating from the paper.

[0049] When maintenance is required, the piston rod of the push-pull cylinder 27 retracts, allowing the third roller seat 241 to move stably upward under the sliding cooperation of the third slide bar 242 and the guide rail 25. This causes the connecting rod 26 to move, and the inner wall of the strip-shaped opening 261 acts on the convex shaft 233, pulling the second roller seat 231. This causes the second roller seat 231 and the second clamping roller 23 to move steadily upward, creating a gap between the first clamping roller 22, the second clamping roller 23, and the third clamping roller 24. This facilitates cleaning and maintenance of the first clamping roller 22, the second clamping roller 23, and the third clamping roller 24.

[0050] A further improvement is that the translation assembly 3 includes a translation cylinder 31, a translation slide rail 32, and a translation sleeve 33. The cylinder of the translation cylinder 31 and the translation slide rail 32 are both fixedly installed, and their length directions are parallel to the length direction perpendicular to the first clamping roller 22. The piston rod of the translation cylinder 31 is connected to the co-extrusion frame 21, and the translation sleeve 33 is slidably connected to the translation slide rail 32 and fixedly connected to the co-extrusion frame 21.

[0051] In this embodiment, the cylinder of the translation cylinder 31 and the translation slide rail 32 are both fixed on the ground. The piston rod of the translation cylinder 31 is fixedly connected to the bottom of one of the co-extrusion supports 212. When the translation cylinder 31 is activated, the co-extrusion support 212 moves parallel to the length direction of the translation slide rail 32 through the sliding sleeve 33 and the translation slide rail 32, thereby causing the co-extrusion support 21 to translate and change the relative position of the coating assembly 1 and the co-extrusion assembly 2.

[0052] A further improvement is that the material guiding assembly 4 includes upper guide rollers 41 that rotate around their own axis above both sides of the first clamping roller 22. There are two upper guide rollers 41 on both sides of the first clamping roller 22, and at least one of them is located above the screw conveyor 12.

[0053] Specifically, the material guiding assembly 4 also includes support plates 44 fixed to both ends of the co-extrusion vertical plate 211 and extending upwards in the vertical direction. A top plate 45 is mounted on the top of the support plate 44, which covers the co-extrusion assembly 2 to prevent dust. Two upper guide rollers 41 are provided at both ends of the co-extrusion vertical plate 211. The two upper guide rollers 41 rotate around their own axis between the two opposing support plates 44 and are distributed in the vertical direction. The topmost upper guide roller 41 is higher than the screw conveyor 12, facilitating the change of conveying direction of the paper as it passes from a higher position. Figure 7 and Figure 8 As shown, by changing the paper's transport path, any side of the paper can be co-extruded with the film material.

[0054] A further improvement is that the material guiding assembly 4 also includes a lower guide roller 42 that rotates around its own axis below the first clamping roller 22; at least two lower guide rollers 42 are provided below the first clamping roller 22, and the projection of the lower guide rollers 42 on the horizontal plane is distributed along a horizontal direction perpendicular to the axial direction of the first clamping roller 22.

[0055] Specifically, the material guiding assembly 4 also includes three lower guide rollers 42. These three lower guide rollers 42 correspond to three co-extrusion supports 212 respectively, and each lower guide roller 42 rotates around its own axis inside the corresponding co-extrusion support 212. The lower guide roller 42 located in the middle has a higher height than the remaining two lower guide rollers 42. With this design, as... Figure 7 and Figure 8 As shown, after the composite paper passes through the first clamping roller 22 and one of the second clamping rollers 23, the paper is guided by three lower guide rollers 42 to facilitate the output of the composite paper. At the same time, it helps to increase the contact area between the composite paper and the first clamping roller 22, which facilitates the rapid cooling of the composite paper and prevents it from getting too hot.

[0056] Second Embodiment

[0057] like Figure 9 and Figure 10 As shown, the second embodiment of the present invention provides a composite paper coating co-extrusion device based on the first embodiment, the difference being that both ends of the lower guide roller 42 are provided with sliding seats 43, the sliding seats 43 slide on the co-extrusion frame 21 in the vertical direction and a locking component 5 is provided between the sliding seats 43 and the co-extrusion frame 21, the locking component 5 is used to lock the sliding seats 43 in at least two working positions.

[0058] By setting a sliding seat 43, which slides on the co-extrusion frame 21 and is locked in position by the locking component 5, it is convenient to adjust and lock the height position of the lower guide roller 42, change the paper transport path, adjust the contact area between the paper and the first clamping roller 22, and facilitate paper transport.

[0059] A further improvement is that the sliding seat 43 is provided with a sliding insertion hole 431, the co-extrusion frame 21 is provided with fixed insertion holes 2121 distributed along the vertical direction, and the locking assembly 5 includes a locking pin 51. The sliding insertion hole 431 is engaged with one of the fixed insertion holes 2121 through the locking pin 51.

[0060] Specifically, the fixed insertion holes 2121 are located at both ends of the co-extrusion bracket 212, and both ends of the co-extrusion bracket 212 are provided with two rows of fixed insertion holes 2121 distributed along the vertical direction. Both the fixed insertion holes 2121 and the sliding insertion holes 431 are through holes. The locking assembly 5 includes a connecting plate 52 and two locking pins 51 fixed on the same side of the connecting plate 52. The two locking pins 51 respectively seal the inner side of the two sliding insertion holes 431 on the sliding seat 43, and respectively seal one of the rows of fixed insertion holes 2121. The position of the sliding seat 43 is locked by the insertion and cooperation between the locking pins 51, the fixed insertion holes 2121 and the sliding insertion holes 431, so as to facilitate locking the position of the axis of the lower guide roller 42.

[0061] A further improvement is that the locking pin 51 and the sliding seat 43 are magnetically connected. Specifically, the connecting plate 52 is a magnet, and the sliding seat 43 is made of iron. By magnetically attracting the sliding seat 43 through the connecting plate 52, a stable connection between the locking pin 51 and the sliding seat 43 is achieved, preventing the locking pin 51 from detaching from the sliding seat 43.

[0062] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A coating and co-extrusion apparatus for composite paper, characterized in that, include: A coating assembly, comprising a horizontal die head, a screw conveyor fixedly connected to the die head, and a hopper connected to the screw conveyor; the die head is elongated and used to output film material downwards. A co-extrusion assembly is disposed below the die head. The co-extrusion assembly includes a co-extrusion frame, a first clamping roller, and a second clamping roller. The first clamping roller and the second clamping roller rotate around their own axis on the co-extrusion frame and their axial directions are parallel to the length direction of the die head. The first clamping roller and the second clamping roller cooperate with each other to co-extrude and connect the paper and film material passing between them. There are two second clamping rollers, which are respectively disposed on both sides of the first clamping roller. A translation assembly drives the co-extrusion frame and the die head to move relative to each other in a horizontal direction perpendicular to the axis of the first clamping roller, so that the die head faces the gap between the first clamping roller and one of the second clamping rollers; The material guiding component is used to guide and switch the paper transport path. There are two paper transport paths, and the two sides of the paper are respectively connected to the film material output by the die head under the two transport paths.

2. The coating and co-extrusion apparatus for composite paper according to claim 1, characterized in that: The output end of the translation component is connected to the co-extrusion frame.

3. The coating and co-extrusion apparatus for composite paper according to claim 2, characterized in that: The translation assembly includes a translation cylinder, a translation slide rail, and a translation sleeve. The cylinder of the translation cylinder and the translation slide rail are both fixedly installed, and their length directions are parallel to the length direction perpendicular to the first clamping roller. The piston rod of the translation cylinder is connected to the co-extrusion frame, and the translation sleeve is slidably connected to the translation slide rail and fixedly connected to the co-extrusion frame.

4. The coating and co-extrusion apparatus for composite paper according to claim 1, characterized in that: The coating assembly also includes a moving unit, which drives the screw conveyor to move along the length direction parallel to the die head between the coating station and the maintenance station. At the coating station, the die head is located directly above the co-extrusion assembly. At the maintenance station, the projection of the die head on the horizontal plane is separated from the projection of the co-extrusion assembly on the horizontal plane.

5. The coating and co-extrusion apparatus for composite paper according to claim 1, characterized in that: The material guiding assembly includes upper guide rollers that rotate around their own axis above both sides of the first clamping roller. There are two upper guide rollers on both sides of the first clamping roller, and at least one of them is located above the screw conveyor.

6. The coating and co-extrusion apparatus for composite paper according to claim 5, characterized in that: The material guiding assembly also includes a lower guide roller that rotates about its own axis below the first clamping roller.

7. The coating and co-extrusion apparatus for composite paper according to claim 6, characterized in that: At least two lower guide rollers are provided below the first clamping roller, and the projections of the lower guide rollers on the horizontal plane are distributed along a horizontal direction perpendicular to the axial direction of the first clamping roller.

8. The coating and co-extrusion apparatus for composite paper according to claim 7, characterized in that: Both ends of the lower guide roller are provided with sliding seats. The sliding seats slide vertically on the co-extrusion frame and a locking component is provided between the sliding seats and the co-extrusion frame. The locking component is used to lock the sliding seats in at least two working positions.

9. The coating and co-extrusion apparatus for composite paper according to claim 8, characterized in that: The sliding seat is provided with a sliding insertion hole, and the co-extrusion frame is provided with fixed insertion holes distributed along the vertical direction. The locking assembly includes a locking pin, and the sliding insertion hole is engaged with one of the fixed insertion holes through the locking pin.

10. The coating and co-extrusion apparatus for composite paper according to claim 9, characterized in that: The locking pin and the sliding seat are magnetically connected.

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