An indentation device for multi-layer composite coated paper

Abstract

This utility model discloses a creasing device for multi-layer composite coated paper, comprising: a frame; an unwinding assembly including an unwinding roller and an unwinding drive unit; a winding assembly including a winding roller and a winding drive unit; an embossing roller; and an extrusion assembly including a translation unit, an elastic unit, a support unit, and a rubber roller connected in sequence. The rubber roller is detachably mounted on the support unit, and the rubber roller and the embossing roller are combined to form a composite roller pair. The elastic unit includes an elastic element and a pressure sensor. The axial directions of the winding roller, the unwinding roller, and the embossing roller are all horizontal and parallel. This creasing device for multi-layer composite coated paper facilitates roller replacement by detachably mounting the rubber roller on the support unit, ensuring stable pressure is applied to the composite coated paper during creasing. Furthermore, the pressure sensor detects the pressure, and the translation unit moves the elastic unit to adjust the extrusion pressure between the rubber roller and the embossing roller, further improving the creasing quality.

Description

Technical Field

[0001] This utility model relates to the field of coated paper processing technology, and in particular to an indentation device for multilayer composite coated paper. Background Technology

[0002] High-durability multilayer composite coated paper is a special packaging material with excellent durability, barrier properties and physical structural strength, which is produced by multilayer material composite and coating process. It is commonly used in food, medicine and industrial fields. Its typical structure is "paper layer + coating layer + barrier layer + heat seal layer". The number of layers can be adjusted according to the needs to form a synergistic structure of "multilayer composite + coating".

[0003] To enhance the anti-slip and structural properties of multilayer composite coated paper, existing technologies typically employ a composite roller system consisting of a patterned metal roller (such as a copper roller) and an elastic rubber roller. This system indents the coated paper as it passes between the rollers, imparting anti-slip properties, aesthetic appeal, and functional textures (such as corrugated or grid patterns). However, after prolonged compression and indentation of batches of coated paper, the elasticity of the rubber roller surface decreases, leading to reduced pressure from both the roller and the embossing roller, resulting in shallower indentations. To maintain the indentation depth, the paper's throughput speed is typically slowed, further reducing processing efficiency. Moreover, during the indentation process, differences in pressure between the rollers along the roller axis result in varying indentation depths across the paper, significantly lowering the overall processing quality. Furthermore, in the early stages of roller aging, frequent roller replacements are necessary to maintain pressure, shortening the rollers' lifespan.

[0004] Therefore, it is necessary to improve the indentation device for multilayer composite coated paper in the existing technology. Utility Model Content

[0005] The purpose of this invention is to overcome the defects in the existing technology and provide an indentation device for multi-layer composite coated paper that facilitates the replacement of rubber rollers, adjusts the extrusion pressure to extend the service life and replacement cycle of rubber rollers, and ensures consistent extrusion depth to improve processing quality.

[0006] To achieve the above-mentioned technical effects, the technical solution of this utility model is: an indentation device for multilayer composite coated paper, comprising:

[0007] frame;

[0008] An unwinding assembly includes an unwinding roller and an unwinding drive unit that drives the unwinding roller to rotate about its own axis and is detachably connected to the unwinding roller.

[0009] A take-up assembly includes a take-up roller and a take-up drive unit that drives the take-up roller to rotate about its own axis and is detachably connected to the take-up roller.

[0010] The embossing roller rotates around its own axis on the frame;

[0011] The extrusion assembly includes a translation unit, an elastic unit, a support unit, and a rubber roller connected in sequence. The rubber roller rotates around its own axis and is detachably mounted on the support unit. The rubber roller and the embossing roller are combined to form a composite roller pair located between the unwinding assembly and the winding assembly. The axis of the embossing roller and the axis of the rubber roller are distributed in a first direction. The translation unit drives the support unit to move along the first direction. The elastic unit includes an elastic element and a pressure sensor connected to the elastic element.

[0012] The axial directions of the take-up roller, unwind roller, and embossing roller are all horizontal and parallel.

[0013] Preferably, in order to facilitate the quick loading and unloading of the rubber roller, the support unit includes a sliding frame, the sliding frame having a sliding opening extending in a first direction, the roller shaft of the rubber roller moving in the first direction inside the sliding opening, and a notch provided on one inner wall of the sliding frame for the roller shaft of the rubber roller to be inserted and removed and communicating with the sliding opening.

[0014] Preferably, in order to reduce wear during the movement of the rubber roller, the roller shaft of the rubber roller is connected to a movable bearing, which moves inside the slide.

[0015] Preferably, in order to reduce the replacement cost of the rubber roller, the rubber roller includes a rigid roller body, a removable and elastic roller sleeve fitted outside the roller body, and a limiting roller threaded to both ends of the roller body. The inner ring of the movable bearing is connected to the limiting roller, and the outer ring rolls inside the sliding opening.

[0016] Preferably, to ensure the quality of the indentation, the support unit further includes a connecting frame and a pressure roller. The connecting frame is connected to the elastic unit and its axis is parallel to the axis of the rubber roller. The pressure roller rotates around its own axis on the connecting frame and is located on the side of the rubber roller away from the embossing roller. The movement path of the rubber roller includes an extrusion station. At the extrusion station, the roller surface of the pressure roller abuts against the roller surface of the rubber roller.

[0017] Preferably, for ease of material handling, the connecting frame slides along the first direction on the frame.

[0018] Preferably, in order to ensure that the pressure roller applies a stable extrusion force to the rubber roller, the centerlines of the pressure roller, the rubber roller, and the embossing roller are located on the same horizontal plane.

[0019] Preferably, in order to ensure stable pressure between the pressure roller and the rubber roller, the pressure sensor is mounted on the connecting frame, and the elastic element is detachably mounted between the output ends of the pressure sensor translation unit.

[0020] Preferably, to facilitate the replacement of the elastic element, the elastic element includes a compression spring and inserts connected to both ends of the compression spring. The output end of the translation unit and the connecting frame are respectively provided with two insert tubes that are inserted and engaged with the two inserts and whose coaxial centers are aligned. The pressure sensor is fixed in one of the insert tubes.

[0021] Preferably, in order to facilitate the adjustment of the extrusion pressure on the coated paper, the translation unit includes a translation motor, a translation screw, and a translation sleeve. The translation motor is fixed on the frame and its output end is fixedly connected to the coaxial centerline of the translation screw. The translation screw is axially parallel to the first direction and is threadedly connected to the translation sleeve. The translation sleeve is connected to the elastic unit.

[0022] In summary, compared with the prior art, the embossing device for multi-layer composite coated paper of this utility model has the advantage of detachably mounting the rubber roller on the support unit, which facilitates the replacement of the rubber roller and ensures that stable pressure is applied to the composite coated paper during the embossing process. Furthermore, the pressure sensor detects the pressure and, in conjunction with the translation unit, drives the elastic unit to move, adjusting the squeezing pressure between the rubber roller and the embossing roller, thereby further improving the quality of the embossing process. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0025] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0026] Figure 4 This is a schematic diagram of the operation of this utility model;

[0027] Figure 5 This is a schematic diagram of the frame structure of this utility model;

[0028] Figure 6 yes Figure 5 An explosion diagram;

[0029] Figure 7 This is a schematic diagram of the unwinding drive unit of this utility model;

[0030] Figure 8 yes Figure 7 An explosion diagram;

[0031] Figure 9This is a schematic diagram of the extrusion assembly of this utility model;

[0032] Figure 10 This is a structural schematic diagram of another usage form of the extrusion assembly of this utility model;

[0033] Figure 11 yes Figure 9 An explosion diagram;

[0034] Figure 12 yes Figure 9 An illustration of the explosion from another perspective;

[0035] Figure 13 This is a schematic diagram of the structure of the embossing roller of this utility model;

[0036] Figure 14 yes Figure 13 An explosion diagram;

[0037] Figure 15 This is a schematic diagram of the structure of the winding assembly of this utility model;

[0038] Figure 16 yes Figure 15 An explosion diagram;

[0039] Figure 17 yes Figure 16 Enlarged view of part A;

[0040] Figure 18 yes Figure 15 A schematic diagram of the cross-sectional structure;

[0041] Figure 19 This is a schematic diagram of the structure of the winding roller of this utility model;

[0042] Figure 20 yes Figure 19 An explosion diagram;

[0043] In the diagram: 1. Frame; 11. Base plate; 12. Guide rail; 121. Limiting component; 13. Locking sleeve; 2. Unwinding assembly; 21. Unwinding roller; 22. Unwinding drive unit; 221. Unwinding drive motor; 222. Chain; 223. Sprocket; 224. Rotating bracket; 225. Rotating bearing; 226. Slide tube; 227. Locking bolt; 228. Locking nut; 229. Concentric tube; 23. Unwinding frame; 231. Unwinding groove; 24. Unwinding locking pin; 3. Rewinding assembly; 31. Rewinding roller; 311. Central shaft; 3111. Connecting hole; 3112. Butt hole; 3113. First flange; 312. End cap; 313. Buffer groove; 314. Buffer strip; 3141. Assembly part; 3142. Buffer part; 32. Rewinding drive unit; 321. Rotary motor; 322. Drive wheel; 323. Driven wheel; 324. Synchronous belt; 33. Airbag; 34. Pressure regulating assembly; 341. Bidirectional air pump; 3411. Connecting shaft; 3412. Second flange; 342. Barometer; 343. Filter element; 344. Valve; 35. Sealing ring; 36. Rewinding bracket; 361. Rewinding groove; 37. Rewinding slide rail; 371. Rewinding insertion hole; 38. Locking unit; 381. Rewinding locking pin; 382. Connecting block; 39. Rewinding fixing frame; 4. Embossing roller; 41. Annular groove; 42. Lower support plate; 421. Lower through groove; 43. Upper pressure plate; 431. Upper pressure groove; 44. Fastening bolt; 5. Extrusion assembly; 51. Translation unit; 511. Translation motor; 512. Translation screw; 513. Translation screw sleeve; 514. Translation plate; 52. Elastic unit; 521. Elastic element; 5211. Compression spring; 5212. Insert block; 522. Pressure sensor; 53. Support unit; 531. Sliding frame; 5311. Slide opening; 5312. Notch; 532. Connecting frame; 5321. Connecting frame 5322, Guide rod; 5323, Limiting plate; 533, Pressure roller; 54, Rubber roller; 541, Inner roller body; 542, Roller sleeve; 543, Limiting roller; 544, Moving bearing; 55, Insert tube; 56, Extrusion bracket; 57, Sliding bracket; 571, Extrusion slide rail; 6, Material guiding unit; 61, Upper guide roller; 611, Upper guide frame; 62, Swing roller; 621, Swing frame; 63, Fixed guide roller; 64, Guide roller; 641, Guide frame; 65, Swing cylinder. Detailed Implementation

[0044] 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.

[0045] like Figures 1-20 As shown, the present invention provides an indentation device for multilayer composite coated paper, comprising:

[0046] Rack 1;

[0047] The unwinding assembly 2 includes an unwinding roller 21 and an unwinding drive unit 22 that drives the unwinding roller 21 to rotate around its own axis and is detachably connected to the unwinding roller 21.

[0048] The winding assembly 3 includes a winding roller 31 and a winding drive unit 32 that drives the winding roller 31 to rotate about its own axis and is detachably connected to the winding roller 31.

[0049] Embossing roller 4 rotates around its own axis on frame 1;

[0050] The extrusion assembly 5 includes a translation unit 51, an elastic unit 52, a support unit 53, and a rubber roller 54 connected in sequence. The rubber roller 54 rotates around its own axis and is detachably mounted on the support unit 53. The rubber roller 54 and the embossing roller 4 are combined to form a composite roller pair located between the unwinding assembly 2 and the winding assembly 3. The distribution direction of the axis of the embossing roller 4 and the axis of the rubber roller 54 is a first direction. The translation unit 51 drives the support unit 53 to move along the first direction. The elastic unit 52 includes an elastic element 521 and a pressure sensor 522 connected to the elastic element 521.

[0051] The axial directions of the take-up roller 31, the unwind roller 21, and the embossing roller 4 are all horizontal and parallel.

[0052] In the embossing device of this invention, the rubber roller 54 is detachably mounted on the support unit 53, facilitating its replacement after its service life expires. This ensures that during embossing, the rubber roller 54 and the embossing roller 4 can cooperate to apply a stable extrusion force to the multi-layer composite coated paper passing between them. The circumferential outer edge of the embossing roller 4 has textures, allowing these textures to act on the composite coated paper, thereby forming a stable indentation on the surface of the composite coated paper and improving the processing quality of the coated paper. Furthermore, during the processing of the coated paper, the pressure sensor 522 detects the elastic pressure of the elastic element 521, thereby determining the extrusion force between the embossing roller 4 and the rubber roller 54 on the coated paper. The translation unit 51 then adjusts the end connected to the elastic unit 52 according to the magnitude of the extrusion force. The position is adjusted until the pressure data detected by the pressure sensor 522 is within the preset range of the equipment. Based on this, when the creasing device of this utility model is used, the pressure sensor 522 monitors in real time the squeezing force of the rubber roller 54 and the embossing roller 4 on the coated paper, and adjusts it through the translation unit 51. In this way, even if the rubber roller 54 loses elasticity due to aging and the squeezing force decreases in the initial stage, the output end of the translation unit 51 can move towards the embossing roller 4 to maintain the squeezing force range applied by the embossing roller 4 and the rubber roller 54 on the composite coated paper within a stable preset range. On the one hand, it avoids the decrease in creasing depth and the decrease in creasing processing quality caused by the decrease in squeezing force. On the other hand, it also avoids the problem of reducing the processing efficiency due to the need to reduce the speed of the coated paper to maintain the creasing depth.

[0053] like Figure 5 and Figure 6 As shown, the frame 1 includes a base plate 11, which is generally rectangular in shape and is horizontally fixed to the ground.

[0054] To facilitate the formation of different textures on different multi-layer composite coated papers, the embossing roller 4 is detachably mounted on the frame 1.

[0055] Specifically, such as Figure 13 and Figure 14 As shown, the embossing roller 4 has annular grooves 41 with the same center line as the roller shaft at both ends. The embossing roller 4 also has a lower support plate 42 and an upper pressure plate 43 at both ends. The upper pressure plate 43 is detachably set above the lower support plate 42 and forms an assembly through hole that is sealed to the inner wall of the annular groove 41 with the lower support plate 42. The top surface of the lower support plate 42 and the bottom surface of the upper pressure plate 43 are respectively provided with a lower through groove 421 and an upper pressure groove 431. The cross-section of the lower through groove 421 and the cross-section of the upper pressure groove 431 are two opposite semicircles. The lower support plate 42 and the upper pressure plate 43 are detachably connected by fastening bolts 44.

[0056] Two lower support plates 42 and two upper pressure plates 43 are provided and are located near the two ends of the embossing roller 4. The thickness of the lower support plate 42 and the upper pressure plate 43 is the same as the width of the annular groove 41. The lower support plate 42 is vertically arranged and its bottom end is fixed to the base plate 11. The top end is provided with a downward through groove 421 extending along its own thickness direction. The upper pressure plate 43 is a bent plate structure. Its bottom surface is integrally formed with an upper pressure groove 431. The two ends of the upper pressure plate 43 are connected to the lower support plate 42 by fastening bolts 44.

[0057] With the above structure, when it is necessary to replace the embossing roller 4, unscrew the fastening bolt 44 to separate the upper pressure plate 43 from the lower support plate 42, remove the embossing roller 4, place the embossing roller 4 to be used on the two lower support plates 42, so that the annular grooves 41 at both ends of the embossing roller 4 are respectively placed into the lower through grooves 421 of the two lower support plates 42, and then fix the upper pressure plate 43 on the lower support plate 42 by fastening the bolt 44, so that the lower through groove 421 of the lower support plate 42 and the upper pressure groove 431 of the upper pressure plate 43 combine to form an assembly through hole that seals and fits the inner wall of the annular groove 41, thereby completing the replacement and assembly of the embossing roller 4, which facilitates the processing of composite coated paper to form different textures and meets diverse needs.

[0058] A further improvement is that the support unit 53 includes a sliding frame 531, the sliding frame 531 having a sliding opening 5311 extending along a first direction, the roller shaft of the rubber roller 54 moving along the first direction inside the sliding opening 5311, and a notch 5312 provided on one side of the inner wall of the sliding frame 531 for the roller shaft of the rubber roller 54 to be inserted and removed and communicating with the sliding opening 5311.

[0059] Specifically, such as Figures 9-12 As shown, the support unit 53 has two sliding frames 531, which are located at both ends of the rubber roller 54. The length direction of the two sliding frames 531 and the direction of the sliding opening 5311 on the sliding frame 531 are parallel to the first direction. The sliding opening 5311 allows the roller shaft of the rubber roller 54 to pass through and move along the first direction, which facilitates the adjustment of the position of the rubber roller 54. A notch 5312 is provided on one side wall of the sliding frame 531. The length dimension of the notch 5312 is larger than the outer diameter dimension of the roller shaft of the rubber roller 54, which facilitates the passage of the roller shaft of the rubber roller 54. That is, when the roller shaft of the rubber roller 54 moves from the inside to the outside of the sliding opening 5311, the rubber roller 54 can be removed. When the rubber roller 54 enters the inside of the sliding opening 5311 from the outside through the notch 5312, the connection and installation of the rubber roller 54 and the support unit 53 are completed. In this way, the replacement operation of the rubber roller 54 is convenient and quick, and it is convenient to replace the rubber roller 54 after its aging service life expires.

[0060] A further improvement is that the roller shaft of the rubber roller 54 is connected to a movable bearing 544, which moves inside the slide 5311.

[0061] The roller shaft of the rubber roller 54 is connected to the movable bearing 544, which rolls within the slide 5311. This reduces the friction between the roller shaft of the rubber roller 54 and the inner wall of the slide 5311, facilitating the movement of the rubber roller 54.

[0062] A further improvement is that the rubber roller 54 includes a rigid inner roller body 541, a removable and elastic roller sleeve 542 that is sleeved outside the inner roller body 541, and a limiting roller 543 that is threaded to both ends of the inner roller body 541. The inner ring of the movable bearing 544 is connected to the limiting roller 543, and the outer ring rolls inside the slide 5311.

[0063] With this design, only the roller sleeve 542 needs to be replaced, instead of the entire rubber roller 54, thus reducing replacement costs. Specifically, in the rubber roller 54, the inner roller body 541 and the limiting roller 543 are made of metal (such as copper or steel), and both ends of the roller shaft are threaded for easy threaded connection with the limiting roller 543. The outer circumferential edge of the inner roller body 541 has grooves extending axially in an annular array, and the grooves are through grooves. The roller sleeve 542 is an elastic body, preferably made of rubber or latex, with a circular cross-section. The inner circumferential wall of the roller sleeve 542 has convex strips extending axially and corresponding to the grooves in an annular array. The inner diameter of the roller sleeve 542 is the same as the outer diameter of the inner roller body 541, which facilitates the sealing of the roller sleeve 542 outside the inner roller body 541 and prevents radial relative rotation between the roller sleeve 542 and the inner roller body 541 after the sleeve is connected. The end of the limiting roller 543 adjacent to the roller sleeve 542 has a limiting flange, which abuts against the roller sleeve 542. The outer diameter of the end of the roller sleeve 542 is between the inner and outer diameters of the roller sleeve 542. The limiting flanges of the two limiting rollers 543 abut against the two ends of the roller sleeve 542, thereby achieving axial positioning of the roller sleeve 542 and preventing axial displacement after it is installed on the inner roller body 541. As for the movable bearing 544, its inner ring is fixedly connected to the limiting rollers 543, and the two ends of the outer circumferential edge of the outer ring have outer flanges. The distance between the two outer flanges is the same as the thickness of the sliding frame 531, and the outer diameter of the two outer flanges is larger than the width of the sliding opening 5311. Thus, when the roller shaft of the rubber roller 54 is installed into the sliding opening 5311, the two outer flanges at the same end position respectively abut against the outer walls of the two sides of the corresponding sliding frame 531, thereby achieving axial positioning of the rubber roller 54 and preventing axial displacement of the rubber roller 54.

[0064] A further improvement is that the support unit 53 also includes a connecting frame 532 and a pressure roller 533. The connecting frame 532 is connected to the elastic unit 52 and its axis is parallel to the axis of the rubber roller 54. The pressure roller 533 rotates around its own axis on the connecting frame 532 and is located on the side of the rubber roller 54 away from the embossing roller 4. The movement path of the rubber roller 54 includes an extrusion station. In the extrusion station, the roller surface of the pressure roller 533 abuts against the roller surface of the rubber roller 54.

[0065] With the above design, when the translation unit 51 is running, the elastic unit 52 acts on the connecting frame 532 of the support unit 53, causing the pressure roller 533 to move closer to or further away from the rubber roller 54. In the extrusion position, the roller surface of the pressure roller 533 abuts against the roller surface of the rubber roller 54, so that the pressure roller 533 applies extrusion force to the rubber roller 54 under the force of the elastic unit 52. The rubber roller 54 transmits the force to the composite coated paper passing between it and the embossing roller 4, so as to ensure that the composite coated paper can be subjected to a uniform force along its width direction, thereby ensuring the consistency of the indentation depth and improving the processing indentation quality of the composite coated paper.

[0066] A further improvement is that the connecting frame 532 and the sliding frame 531 are fixedly connected and slide along the first direction on the frame 1.

[0067] With this design, the translation unit 51 can drive the connecting frame 532 and sliding frame 531 in the support unit 53 to move in a direction parallel to the first direction through the elastic unit 52, so that the rubber roller 54 moves closer to or further away from the embossing roller 4. When the rubber roller 54 moves away from the embossing roller 4, the gap between the rubber roller 54 and the embossing roller 4 is greater than the thickness of the coated paper, which facilitates the passage of the coated paper in the early stage of equipment operation. When the rubber roller 54 moves closer to the embossing roller 4, the rubber roller 54 and the embossing roller 4 can cooperate with each other to squeeze the multi-layer composite coated paper and form indentations on the multi-layer composite coated paper.

[0068] A further improvement is that the centerlines of the pressure roller 533, the rubber roller 54, and the embossing roller 4 are located on the same horizontal plane.

[0069] The pressure roller 533, the glue roller 54, and the embossing roller 4 are distributed sequentially along the first direction. At this time, the first direction is parallel to the length direction of the substrate 11, so that when the translation unit 51 drives the support unit 53 and the glue roller 54 to move, it only needs to overcome the resistance in the horizontal direction, thus reducing the power consumption of the translation unit 51. Moreover, after the center lines of the above three are located on the same horizontal plane, it can be ensured that the glue roller 54 can fully apply the squeezing force applied by the pressure roller 533 to the composite coated paper. With the translation adjustment 51, on the one hand, the squeezing force of the composite coated paper can be quickly adjusted, and on the other hand, power consumption can be reduced, avoiding the increase in power consumption when adjusting the squeezing force due to the presence of component forces.

[0070] A further improvement is that the pressure sensor 522 is mounted on the connecting bracket 532, and the elastic element 521 is detachably mounted between the output ends of the pressure sensor 522 translation unit 51.

[0071] This design facilitates the replacement of the elastic element 521 after a period of use, ensuring stable elastic pressure of the elastic element 521 and preventing aging of the elastic element 521 from affecting the indentation quality.

[0072] A further improvement is that the elastic element 521 includes a compression spring 5211 and a plug 5212 connected to both ends of the compression spring 5211. The output end of the translation unit 51 and the connecting frame 532 are respectively provided with two insert tubes 55 that are inserted and cooperate with the two insert blocks 5212 and are aligned with the coaxial center lines. The pressure sensor 522 is fixed in one of the insert tubes 55.

[0073] Two insert blocks 5212 are inserted into two insert tubes 55. A spring 5211 applies pressure to the two insert blocks 5212, so that the two insert blocks 5212 are connected to the translation unit 51 and the support unit 53. At the same time, one of the insert blocks 5212 abuts against the pressure sensor 522 in the corresponding insert tube 55, so that the insert block 5212 can apply pressure to the pressure sensor 522, so that the pressure sensor 522 can detect pressure data to determine the pressure of the rubber roller 54 and the embossing roller 4 on the paper.

[0074] A further improvement is that the translation unit 51 includes a translation motor 511, a translation screw 512, and a translation sleeve 513. The translation motor 511 is fixed on the frame 1 and its output end is fixedly connected to the coaxial center line of the translation screw 512. The translation screw 512 is axially parallel to the first direction and is threadedly connected to the translation sleeve 513. The translation sleeve 513 is connected to the elastic unit 52.

[0075] After the translation motor 511 is started, it can drive the translation screw 512 to rotate, which acts on the translation screw sleeve 513, so that the translation screw sleeve 513 moves in the first horizontal direction, which facilitates the adjustment of the position of the pressure roller 533 and the rubber roller 54.

[0076] Specifically, such as Figures 9-12 As shown, the extrusion assembly 5 also includes an extrusion bracket 56 and a sliding bracket 57. The sliding bracket 57 is fixed above the substrate 11. There are two sliding brackets 57, which are distributed along the width direction perpendicular to the substrate 11. An extrusion slide rail 571 extending along the first direction is fixed on the top of the sliding bracket 57. The two sliding frames 531 slide on the two extrusion slide rails 571 in a one-to-one correspondence and the sliding direction is parallel to the length direction of the substrate 11.

[0077] The extrusion bracket 56 is located on the side of the sliding bracket 57 away from the embossing roller 4. The translation motor 511 is fixed to the extrusion bracket 56. The translation screw 512 is axially parallel to the length direction of the substrate 11. The translation sleeve 513 is fixed to a translation plate 514 at one end away from the translation motor 511. The length direction of the translation plate 514 is parallel to the width direction of the substrate 11. One of the inserts 55 is fixed to the side of the translation plate 514 away from the translation motor 511. In the bracket unit 53, the connecting frame 532 is a barrel-shaped structure with one open side facing the embossing roller 4. Its length direction is consistent with the width direction of the substrate 11, and a connecting frame 5321 is fixed on the side near the embossing roller 4. The pressure roller 533 rotates around its own axis in the inner cavity formed by the connecting frame 5321 and the connecting bracket 532. A guide rod 5322 extending along the length of the substrate 11 is fixed on the side of the connecting bracket 532 away from the embossing roller 4. A limit plate 5323 is fixed on the side of the guide rod 5322 away from the connecting bracket 532. Two guide rods 5322 are distributed along the width of the substrate 11. A translation plate 514 is slidably sleeved on the two guide rods 5322. Another insertion tube 55 is fixed on the side of the connecting bracket 532 away from the embossing roller 4 and located between the two guide rods 5322. A pressure sensor 522 is fixed inside the insertion tube 55 and connected to the translation plate 514 through an elastic member 521.

[0078] In the production and processing of multilayer composite coated paper, the coating speed is usually greater than the indentation speed. Specifically, the indentation speed is about 60% to 80% of the coating speed, with the coating speed being 150 to 300 meters per minute and the indentation speed being 80 to 200 meters per minute. This is because:

[0079] Lamination is a process in which molten plastic (such as PE or PP) is evenly coated onto the surface of paper through a die, and then cooled and solidified to form a thin film. Minor defects (such as small bubbles or thin spots) that occur during lamination can be covered and repaired through subsequent lamination processes (such as multi-layer lamination), with film thickness deviations within ±10%. The coating process can still meet the usage requirements, so it has a relatively high tolerance for errors. However, for creasing, it is formed on the paper surface by the extrusion of the embossing roller 4 and the rubber roller 54. It relies on the plastic deformation of the material. Since creasing is a material forming process, once the forming deviates (such as creasing misalignment or insufficient depth), it is difficult to correct through subsequent processes, which will directly lead to product scrap. Therefore, the tolerance for errors is relatively low. The creasing speed is limited by the pressure transmission time. If the speed is too fast, the contact time between the embossing roller 4 and the paper is too short, and the pressure has not been fully transmitted to the inner layer of the paper, which will result in insufficient creasing depth or blurred edges. The rigidity of multi-layered paper is relatively higher (there is internal stress between the composite layers), and a longer extrusion time is required to ensure the stability of the creasing formation. Therefore, the creasing speed usually needs to be controlled at 60% to 80% of the coating speed.

[0080] Due to the significant difference between the indentation speed and the coating speed, the indentation efficiency will be much lower than the coating efficiency in the same set of equipment during actual production. In order to ensure that the indentation efficiency is basically consistent with the coating efficiency, this utility model has made the following improvements to enhance the indentation efficiency so that it can match the coating production efficiency of multi-layer composite coated paper and improve the overall production efficiency, as described below.

[0081] In the creasing device of this utility model, there are two extrusion components 5. In each extrusion component 5, the translation unit drives the rubber roller 54 to move between the creasing station and the retraction station. The rubber roller 54 at the creasing station cooperates with the embossing roller 4 to extrude the composite coated paper. The gap between the rubber roller 54 at the retraction station and the embossing roller 4 is greater than the thickness of the composite coated paper. In addition, in this creasing device, the unwinding component 2 includes two unwinding rollers 21 corresponding to the two extrusion components 5. The output end of the unwinding drive unit 22 is detachably connected to the two unwinding rollers 21 to drive the two unwinding rollers 21 to rotate around their own axis. The winding component 3 includes two winding rollers 31 corresponding to the two extrusion components 5. The output end of the winding drive unit 32 is detachably connected to the two winding rollers 31 to drive the two winding rollers 31 to rotate around their own axis.

[0082] Unlike existing technologies, the creasing device of this invention has two extrusion components 5, two unwinding rollers 21, and two rewinding rollers 31, which correspond one-to-one. The rubber rollers 54 of the two extrusion components 5 can cooperate with the embossing roller 4 from different positions to process the multi-layer composite coated paper output from the unwinding roller 21 and input from the rewinding roller 31. The creasing device of this invention has two working modes: Mode A, in which one unwinding roller 21 is selected for unwinding and one rewinding roller 31 is selected for rewinding, and the multi-layer composite coated paper is passed between the embossing roller 4 and one of the rubber rollers 54. In this mode, the idle unwinding roller 21, rewinding roller 31 and extrusion components 5 can also be processed. Maintenance; Mode B, with two unwinding rollers 21, two take-up rollers 31, and two extrusion components 5 operating simultaneously, can perform creasing on two coated papers. In existing technology, the creasing speed is 60%–80% of the coating speed. Therefore, with this device, the two extrusion components 5, in conjunction with one embossing roller 4, can match the creasing efficiency of the entire coating production system with the coating efficiency. In actual operation, one can choose to increase the coating speed to improve overall production efficiency, or slow down the creasing speed to extend the contact time between the embossing roller 4 and the coated paper, thereby ensuring creasing depth and improving creasing quality. In this mode, regardless of the method chosen, the creasing efficiency is significantly improved. Furthermore, since the position of the output end of the extrusion assembly 5 can be changed by the translation unit 51 and the pressure on the rubber roller 54 can be adjusted by the elastic unit 52, the indentation depth can also be adjusted. That is, when processing the indentation of two composite coated papers, indentations of a specific depth (the depth can be the same or different) can be formed on the two composite coated papers according to the requirements, so as to meet the various needs of customers.

[0083] Moreover, compared to using two creasing devices that require two embossing rollers 4, the creasing device of this invention only requires one embossing roller 4 to creasing two coated papers, thereby reducing the number of embossing rollers 4 needed and thus reducing creasing costs.

[0084] A further improvement is that the two rubber rollers 54 are respectively located on both sides of the embossing roller 4.

[0085] This design allows the two extrusion components 5 to apply pressure to the embossing roller 4 from both sides, ensuring uniform force on both sides of the embossing roller 4. At the same time, it provides sufficient gap between the two extrusion components 5 to facilitate the winding and passing of the coated paper.

[0086] A further improvement is that the centerlines of the embossing roller 4 and the two rubber rollers 54 are located on the same horizontal plane.

[0087] The above design ensures that the two rubber rollers 54 can apply extrusion force to the two coated papers from opposite directions, and further ensures the uniformity of force on both sides of the embossing roller 4.

[0088] A further improvement is that the unwinding drive unit 22 drives the two unwinding rollers 21 to rotate at the same speed.

[0089] This design reduces the number of drive sources for the unwinding drive unit 22, lowering costs. Meanwhile, the two unwinding rollers 21 rotate at the same speed, ensuring that the unwinding speed of the two composite coated papers is consistent. This facilitates the synchronous adjustment of the speeds of the two unwinding rollers 21, ensuring that the overall creasing efficiency is consistent with the coating production efficiency of the composite coated paper.

[0090] A further improvement is that the unwinding drive unit 22 includes an unwinding drive motor 221, a chain 222, and two sprockets 223 of the same specifications. The drive motor is fixed on the frame 1 and its output end is connected to one of the sprockets 223 along the coaxial line. Both sprockets 223 rotate around their own axis on the frame 1 and are detachably connected to the two unwinding rollers 21 along the coaxial line.

[0091] Since the two sprockets 223 have the same specifications and model, after the drive motor 211 drives one of the sprockets 223 to rotate, the other sprocket 223 will rotate through the chain 222 and the rotation speed of the two sprockets 223 is the same. Since the two sprockets 223 are detachably connected to the two unwinding rollers 21 along the coaxial center line, the two unwinding rollers 21 can achieve the same rotation speed.

[0092] Specifically, in this utility model, such as Figure 7 and Figure 8 As shown, the unwinding drive unit 22 is located on one side above the substrate 11 and also includes two rotating brackets 224. The two rotating brackets 224 are distributed along the length direction of the substrate 11. The unwinding drive motor 221 and the two rotating brackets 224 are both fixed above the substrate 11. Rotating bearings 225 with the same axis are provided on both sides of the two sprockets 223. The inner ring of the rotating bearing 225 is fixedly connected to the coaxial axis of the sprocket 223, and the outer ring is fixedly connected to the rotating bracket 224. The rotating bearings 225 provide stable support for the rotation of the sprockets 223.

[0093] To facilitate the detachable connection of the unwinding drive unit 22 and the unwinding roller 21 along their coaxial axis, a concentric tube 229, coaxial with the embossing roller 4, is fixed to the side of the sprocket 223 adjacent to it. A sliding tube 226 is slidably connected to the inner side of the concentric tube 229 and provides a limiting connection. One end of the sliding tube 226 away from the sprocket 223 protrudes from the concentric tube 229, and the protruding part is provided with a threaded locking bolt 227 and a locking nut 228. The cap of the locking bolt 227 and... Locking nuts 228 are located on both sides of slide tube 226. The inner diameter of slide tube 226 is the same as the outer diameter of unwinding roller 21. Thus, by inserting slide tube 226 into one end of unwinding roller 21, and then screwing on locking bolt 227 and locking nut 228, unwinding drive unit 22 and unwinding roller 21 can be connected. By unscrewing locking nut 228 and removing locking bolt 227, unwinding drive unit 22 and unwinding roller 21 can be separated.

[0094] In order to support the stable rotation of the unwinding roller 21, the unwinding assembly 2 also includes an unwinding frame 23. The unwinding frame 23 is a U-shaped frame that is vertically arranged and open at the top. The unwinding frame 23 slides on the substrate 11 along the length direction of the substrate 11. Unwinding grooves 231 are provided at the top of both ends of the unwinding frame 23. The unwinding grooves 231 are through grooves that extend along the width direction of the substrate 11. The cross-section of the unwinding grooves 231 is U-shaped, and the center of the bottom is on the same horizontal plane as the axis of the slide tube 226.

[0095] like Figure 5 and Figure 6 As shown, a guide rail 12 extending along the length direction is fixed on the top surface of the substrate 11. The unwinding frame 23 slides on the substrate 11 via the guide rail 12. Limiting members 121 are fixed at both ends of the guide rail 12 to limit the sliding range of the unwinding frame 23. When the unwinding frame 23 slides to the limiting member 121 near the end of the substrate 11, it is convenient to place the unwinding roller 21 into or remove the unwinding roller 21 from the unwinding groove 231. When the unwinding frame 23 drives the unwinding roller 21 to slide to another limiting member 121, the unwinding roller 21 is coaxial with the concentric tube 229, sprocket 223 and slide tube 226. A locking sleeve 13 is also fixed, and an insertion hole is provided at the bottom of the unwinding frame 23. The locking sleeve 13 and the insertion hole are engaged by the unwinding locking pin 24 to lock the position of the unwinding frame 23. In the locked state, the unwinding frame 23 is in contact with the limiting member 121 near the center of the base plate 11, and the unwinding roller 21 on the unwinding frame 23 is coaxial with the sprocket 223. The roller shaft of the unwinding roller 21 has through holes at both ends for the rod of the locking bolt 227 to pass through. At this time, the sliding tube 226 is slid, and the locking bolt 227 is passed through the sliding tube 226 and the through hole and then the locking nut 228 is screwed on, so that the unwinding drive unit 22 and the unwinding roller 21 can be connected.

[0096] After the creasing process is completed, the winding drive unit 32 drives the winding roller 31 to rotate, thereby winding the composite coated paper. Since there are indentations on the surface of the coated paper after processing, the composite coated paper has a certain thickness. However, in the prior art, the winding roller 31 of the coated paper has a fixed and simple structure, usually a rigid metal roller. When the metal roller is used for winding, if the winding speed is too fast or the winding traction force is too large, there will be a large squeezing force between the metal roller and the wound creasing composite coated paper, which will make the creasing marks on the composite coated paper shallower and reduce the quality of the creasing on adjacent papers. Based on the above, the creasing device of this utility model further improves the winding component 3, especially the winding roller 31, as described below.

[0097] The winding roller 31 in the winding assembly 3 of this utility model is axially horizontal and rotates on the frame 1 around its own axis. A flexible buffer layer is provided on the circumferential outer edge of the roller body. The buffer layer includes buffer strips 314 distributed circumferentially along the central axis 311.

[0098] With the above design, buffer strips 314 distributed circumferentially around the outer periphery of the roller are provided. The buffer strips 314 are made of flexible material. Therefore, during winding, the creased composite coated paper first comes into contact with the flexible buffer strips 314. The buffer strips 314 can reduce the pressure on the composite coated paper through their deformation, thereby reducing the impact of creases on the composite coated paper, reducing crease deformation, and ensuring winding quality.

[0099] A further improvement is that the take-up roll 31 also includes:

[0100] Central axis 311;

[0101] Two end caps 312 are distributed along the axial direction of the central shaft 311 and are adjacent to both ends of the central shaft 311. The two end caps 312 are fixed to the outside of the central shaft 311.

[0102] The buffer grooves 313 are arranged in a ring array around the outer periphery of the central shaft 311 and are fixedly connected to the end caps 312 at both ends. The opening of the buffer grooves 313 faces away from the axis of the central shaft 311. The buffer strip 314 includes an assembly part 3141 located inside the buffer grooves 313 and a buffer part 3142 located outside the buffer grooves 313.

[0103] Both the buffer bar 314 and the buffer groove 313 extend axially along the central axis 311.

[0104] Specifically, such as Figure 15As shown, in the take-up roller 31, the central shaft 311 is located at the center. End caps 312 are fixedly fitted onto the central shaft 311 near both ends along its coaxial centerline. The end caps 312 are circular caps with mounting openings arranged in a ring around their outer circumference. The outer walls of the two ends of the buffer groove 313 are fixed between the inner walls of the mounting openings. The opening of the buffer groove 313 faces away from the central shaft 311. The buffer groove 313 is used to install the buffer strip 314. The buffer strip 314 is divided into two parts, one of which is the assembly part 3141. In its natural state, it is adapted to the internal space of the buffer groove 313, while the other part is the buffer section 3142, which protrudes out of the buffer groove 313. When the winding roller 31 winds up the multi-layer composite coated paper after creasing, the protruding buffer section 3142 absorbs the pressure, reduces the deformation of the creasing on the composite coated paper, and ensures the winding quality. In addition, the buffer groove 313 and the buffer strip 314 both extend along the axial direction parallel to the central axis 311 to form a strip structure, which is convenient for production and processing and easy for assembly.

[0105] In order to ensure that the buffer strip 314 has sufficient flexibility so that it has sufficient buffering force to reduce the deformation of the indentation after contacting the multilayer composite coated paper after embossing, the buffer strip 314 is preferably a sponge strip in this invention.

[0106] A further improvement is that the central shaft 311 is a tubular structure with one end open and the other end closed, and a connecting hole 3111 communicating with its own inner cavity is provided on the side wall. The indentation device also includes:

[0107] Airbag 33 is fixedly sleeved outside the central shaft 311. The connecting hole 3111 communicates with the inner cavity of the airbag 33, or the airbag 33 and the central shaft 311 enclose a deformable cavity that communicates with the connecting hole 3111. There is space for the airbag 33 to expand between adjacent buffer strips 314, between adjacent buffer grooves 313, and between each buffer strip 314 and the central shaft 311.

[0108] Pressure regulating component 34 is used to regulate the air pressure inside airbag 33.

[0109] In the initial winding stage, the pressure regulating component 34 increases the air pressure inside the airbag 33, causing the airbag 33 to expand and deform outward. It fills the spaces between adjacent buffer strips 314, adjacent buffer grooves 313, and between each buffer strip 314 and the central axis 311, then bulges outward. The airbag 33 continues to expand and deform, making its maximum radial distance from the axis of the central axis 311 greater than the maximum radial distance between the buffer portion 3142 and the axis of the central axis 311. After winding begins, the indented multilayer composite coated paper directly contacts the deformed airbag 33, while maintaining a certain gap with the buffer strips 314. As winding progresses, the amount of composite coated paper wound increases, which can easily increase the pressure between the composite coated papers, potentially increasing the likelihood of indentation deformation. Therefore, the pressure regulating component 34 reduces the air pressure inside the airbag 33 to lower the pressure. The amount of gas inside the air bladder 33 causes it to contract towards the central axis 311. This contraction provides space for the wound composite coated paper to shrink inward, thus reducing deformation of the indentations on the composite coated paper. When the composite coated paper comes into contact with the buffer strip 314, the buffer strip 314, being a flexible sponge strip, can alleviate the pressure on the composite coated paper. Thus, by increasing the air pressure of the air bladder 33 before winding through the pressure regulating component 34 and gradually decreasing the air pressure during winding, the air bladder 33 gradually deforms, providing space for the wound composite coated paper to deform inward. When the composite coated paper comes into contact with the buffer strip 314, the buffer strip 314 can also alleviate the pressure on the composite coated paper, thereby preventing large deformation of the indentations on the composite coated paper and ensuring the winding quality of the composite coated paper after the indentation treatment.

[0110] A further improvement is that the pressure regulating assembly 34 includes a bidirectional air pump 341, a barometer 342, and a filter element 343. One end of the bidirectional air pump 341 is connected to the open end of the central shaft 311 and to the filter element 343, while the other end is connected to the outside and is detachably connected to the filter element 343.

[0111] When one end of the bidirectional air pump 341 is connected to the open end of the central shaft 311 and the other end is connected to the filter element 343, it can either draw in external air, filter it through the filter element 343, and fill the airbag 33, causing the internal air pressure of the airbag 33 to increase and expand outward, or it can draw air out of the airbag 33 and discharge it to the outside, reducing the internal air pressure of the airbag 33 and then contracting the central shaft 311, thus achieving flexible adjustment of the internal air pressure and shape of the airbag 33; moreover, the filter element 343 is detachably connected to one end of the bidirectional air pump 341, which facilitates the maintenance of the filter element 343; in this embodiment, the filter element 343 is a filter barrel, which is threadedly connected to one end of the bidirectional air pump 341, and the bottom of the filter barrel is densely covered with filter holes for filtering dust and impurities in the outside air.

[0112] A further improvement is that the two ends of the bidirectional air pump 341 are coaxial, the winding drive unit 32 is driven by the bidirectional air pump 341, and the bidirectional air pump 341 is detachably connected to the central shaft 311.

[0113] With the above structure, by connecting the bidirectional air pump 341 to the central shaft 311, the winding drive unit 32 drives the bidirectional air pump 341 to rotate, which in turn drives the central shaft 311 to rotate around its own axis, causing the winding roller 31 to rotate and winding up the crimped multilayer composite coated paper. Therefore, it is not necessary to connect and disconnect the winding roller 31 from the bidirectional air pump 341 and the winding drive unit 32 one by one, making the operation convenient and quick.

[0114] A further improvement is that the winding drive unit 32 includes a rotary motor 321, a drive wheel 322, a driven wheel 323, and a timing belt 324. The rotary motor 321 is mounted on the frame 1 and its output end is coaxially connected to the drive wheel 322. The drive wheel 322 is connected to the driven wheel 323 via the timing belt 324. The driven wheel 323 is coaxially sleeved at one end of the bidirectional air pump 341 adjacent to the central shaft 311. A mating hole 3112 and a mating shaft 3411 are provided between the bidirectional air pump 341 and the central shaft 311, with the mating direction parallel to the circumference of the central shaft 311.

[0115] Specifically, such as Figures 15-17 As shown, the winding assembly 3 also includes a winding fixing frame 39, which is fixed above the extrusion bracket 56. The bidirectional air pump 341 is axially parallel to the width direction of the substrate 11 and rotates around its own axis on the winding fixing frame 39. The rotary motor 321 is fixed on the winding fixing frame 39, and its output end is fixedly connected to the drive wheel 322 along the coaxial axis. The driven wheel 323 is fixedly sleeved on the end of the bidirectional air pump 341 adjacent to the winding roller 31. Thus, when the rotary motor 321 is started, it can drive the drive wheel 322 to rotate, and drive the driven wheel 323 to rotate through the synchronous belt 324, so that the bidirectional air pump 341, which is fixedly connected to the driven wheel 323 along the coaxial axis, rotates.

[0116] At the end of the central shaft 311 adjacent to the bidirectional air pump 341, i.e., at its open end, a first flange 3113 is integrally connected to the outer circumferential centerline of its circumferential outer edge. A mating hole 3112 is arranged in a ring array on the first flange 3113. At the end of the bidirectional air pump 341 adjacent to the central shaft 311, a second flange 3412 is integrally connected to the outer circumferential centerline of its circumferential outer edge. A mating shaft 3411 is arranged in a ring array on the side of the second flange 3412 adjacent to the central shaft 311. The mating shafts 3411 and the mating holes 3112 correspond one-to-one and are interlocked. With the above design, the central shaft 311 and the bidirectional air pump 341 are kept coaxial, and the radial angle of the central shaft 311 is adjusted so that the docking hole 3112 is aligned with the docking shaft 3411. Then, the docking hole 3112 is sealed and fitted outside the docking shaft 3411, so that the bidirectional air pump 341 and the central shaft 311 can be accurately docked. This allows the bidirectional air pump 341 to adjust the air pressure and air volume in the air bag 33, while the winding drive unit 32 can drive the bidirectional air pump 341 and the winding roller 31 to rotate synchronously.

[0117] To prevent a gap between the first flange 3113 and the second flange 3412, which could prevent the bidirectional air pump 341 from accurately adjusting the internal air pressure of the airbag 33, an elastic sealing ring 35 is provided between the bidirectional air pump 341 and the central shaft 311. The mating hole 3112 and the mating shaft 3411 are located outside the sealing ring 35, which is sandwiched between the first flange 3113 and the second flange 3412. This ensures a sealed and tight connection between the first flange 3113 and the second flange 3412, allowing the bidirectional air pump 341 to operate smoothly. 41 can introduce outside air into the airbag 33 or discharge the air inside the airbag 33 to the outside, thereby regulating the air pressure of the airbag 33. The sealing ring 35 is preferably a rubber ring or a silicone ring. In order to further precisely control the air pressure inside the airbag 33, a valve 344 is connected to the end of the bidirectional air pump 341 away from the central shaft 311. The valve 344 is an on / off valve. When the bidirectional air pump 341 is working, the valve 344 is opened to facilitate the regulation of the air pressure inside the airbag 33. After the bidirectional air pump 341 stops working, the valve 344 is closed.

[0118] A further improvement is that the indentation device of this invention also includes:

[0119] The winding bracket 36 is a U-shaped frame that slides on the frame 1 along the axis parallel to the central axis 311. Both ends of the top are provided with winding grooves 361 for the central axis 311 to be inserted and the width is the same as the outer diameter of the central axis 311.

[0120] The locking unit 38 is used to lock the winding bracket 36 onto the frame 1. In the locked state, the central shaft 311 installed in the winding groove 361 of the winding bracket 36 is coaxially and sealed to one end of the bidirectional air pump 341.

[0121] The frame 1 is provided with a take-up slide rail 37 that extends axially along the central axis 311 and slides with the take-up bracket 36. The take-up slide rail 37 is provided with a take-up insertion hole 371. The locking unit 38 includes a take-up locking pin 381 that is inserted into the take-up insertion hole 371. In the locked state, the take-up locking pin 381 abuts against the end of the take-up bracket 36 away from the bidirectional air pump 341.

[0122] Specifically, the top of the extrusion bracket 56 is fixed with a winding slide rail 37 extending along the width direction of the substrate 11 and arranged side by side along the length direction of the substrate 11. The winding bracket 36 is a U-shaped frame with its opening facing upward. Its bottom slides on the extrusion bracket 56 through the winding slide rail 37. The length direction of the winding bracket 36 is parallel to the width direction of the substrate 11. The top of both ends of the winding bracket 36 is fixed with a winding groove 361 extending along the width direction of the substrate 11 and being a through groove. The winding groove 361 is a U-shaped groove, and its groove width is consistent with the outer diameter of the central shaft 311. The bottom of the winding groove 361 is coaxial with the two ends of the bidirectional air pump 341. The opening width of the winding bracket 36 is consistent with the distance between the two ends of the end caps 312 that are far apart from each other. The top surface of the winding slide rail 37 is provided with a winding insertion hole 371 extending in the vertical direction. In the locking unit 38, the winding locking pin 381 is inserted into the winding insertion hole 371 in a one-to-one correspondence and is fixedly connected by the connecting block 382.

[0123] With the above structure, the take-up roller 31 can be easily horizontally mounted via the take-up grooves 361 at both ends of the take-up bracket 36, ensuring that the central axis 311 of the take-up roller 31 is coaxial with both ends of the bidirectional air pump 341. After adjusting the angle of the central axis 311 so that the mating hole 3112 on the first flange 3113 is aligned with the mating shaft 3411 on the second flange 3412, the take-up bracket 36 is moved against the bidirectional air pump 341 and along the take-up slide rail 37, so that the first flange 3113 and the second flange 3412 pass through a tight After the sealing ring 35 is sealed and fitted, and the docking hole 3112 is sleeved on the docking shaft 3411, the winding locking pins 381 are inserted one by one into the winding insertion holes 371 on the winding slide rail 37 through the connecting block 382. While fixing the position of the connecting block 382 on the winding slide rail 37, the connecting block 382 abuts against the position of the winding bracket 36, thereby fixing the axial position of the winding roller 31 and preventing the axial position of the winding roller 31 from shifting, so that the bidirectional air pump 341 and the central shaft 311 remain in a sealed and fixed communication state.

[0124] To achieve a compact structure, the two winding components 3 are positioned above the two unwinding components 2, one for each other. Furthermore, the creasing device includes two guiding units 6, which are respectively positioned on both sides of the embossing roller 4. These units guide the transmission path of the multi-layer composite coated paper and adjust the transmission tension. Each guiding unit 6 includes an upper guide roller 61, a swing roller 62, a fixed guide roller 63, and a swing cylinder 65. The axis lines of the upper guide roller 61, the swing roller 62, and the fixed guide roller 63 are all parallel to... In the width direction of substrate 11, the upper guide roller 61 is disposed above the connecting frame 532 via the upper guide frame 611 and rotates around its own axis. The swing roller 62 is connected to the swing frame 621 and rotates around its own axis. The swing frame 621 rotates between the sliding brackets 57 and the axis of rotation is parallel to the width direction of substrate 11. The cylinder of the swing cylinder 65 is hinged to the sliding bracket 57, and the piston rod is hinged to the swing frame 621. The fixed guide roller 63 rotates between the sliding brackets 57 around its own axis.

[0125] One of the guiding units 6 also includes a guide roller 64. The axis of the guide roller 64 is parallel to the width direction of the substrate 11 and is connected to a guide frame 641. Multiple guide rollers 64 are provided, and there are two types: the first type is fixed on the substrate 11, and the second type is fixed on the extrusion bracket 56 and the winding bracket 36. Multiple guide rollers 64 are provided for both types. The guide rollers 64 facilitate the change of the transmission direction of the multilayer composite coated paper. During the creasing and transmission process, one composite coated paper passes from bottom to top between the embossing roller 4 and one of the adhesive rollers 54, while the other composite coated paper changes its transmission direction through the guide roller 64 and passes from top to bottom between the embossing roller 4 and the other adhesive roller 54. Finally, the two creasing-treated composite coated papers are respectively transmitted to the winding roller 31 for winding.

[0126] 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. An indentation device for multilayer composite coated paper, characterized in that, include: frame; An unwinding assembly includes an unwinding roller and an unwinding drive unit that drives the unwinding roller to rotate about its own axis and is detachably connected to the unwinding roller. A take-up assembly includes a take-up roller and a take-up drive unit that drives the take-up roller to rotate about its own axis and is detachably connected to the take-up roller. The embossing roller rotates around its own axis on the frame; The extrusion assembly includes a translation unit, an elastic unit, a support unit, and a rubber roller connected in sequence. The rubber roller rotates around its own axis and is detachably mounted on the support unit. The rubber roller and the embossing roller are combined to form a composite roller pair located between the unwinding assembly and the winding assembly. The axis of the embossing roller and the axis of the rubber roller are distributed in a first direction. The translation unit drives the support unit to move along the first direction. The elastic unit includes an elastic element and a pressure sensor connected to the elastic element. The axial directions of the take-up roller, unwind roller, and embossing roller are all horizontal and parallel.

2. The indentation device for multilayer composite coated paper according to claim 1, characterized in that: The support unit includes a sliding frame with a sliding opening extending in a first direction. The roller shaft of the rubber roller moves in the first direction inside the sliding opening. A notch is provided on one inner wall of the sliding frame for inserting and removing the roller shaft of the rubber roller and communicating with the sliding opening.

3. The indentation device for multilayer composite coated paper according to claim 2, characterized in that: The roller shaft of the rubber roller is connected to a movable bearing, which moves inside the slide.

4. The indentation device for multilayer composite coated paper according to claim 3, characterized in that: The rubber roller includes a rigid roller body, a removable and elastic roller sleeve fitted outside the roller body, and a limiting roller connected to both ends of the roller body by threads. The inner ring of the movable bearing is connected to the limiting roller, and the outer ring rolls inside the sliding opening.

5. The indentation device for multilayer composite coated paper according to claim 3, characterized in that: The support unit further includes a connecting frame and a pressure roller. The connecting frame is connected to the elastic unit and its axis is parallel to the axis of the rubber roller. The pressure roller rotates around its own axis on the connecting frame and is located on the side of the rubber roller away from the embossing roller. The movement path of the rubber roller includes an extrusion station. At the extrusion station, the roller surface of the pressure roller abuts against the roller surface of the rubber roller.

6. The indentation device for multilayer composite coated paper according to claim 5, characterized in that: The connecting frame slides on the frame along the first direction.

7. The indentation device for multilayer composite coated paper according to claim 6, characterized in that: The centerlines of the pressure roller, the rubber roller, and the embossing roller are located on the same horizontal plane.

8. The indentation device for multilayer composite coated paper according to claim 5, characterized in that: The pressure sensor is mounted on the connecting frame, and the elastic element is detachably mounted between the output ends of the pressure sensor translation unit.

9. The indentation device for multilayer composite coated paper according to claim 8, characterized in that: The elastic element includes a compression spring and inserts connected to both ends of the compression spring. The output end of the translation unit and the connecting frame are respectively provided with two insert tubes that are inserted into the two inserts and whose coaxial centers are aligned. The pressure sensor is fixed in one of the insert tubes.

10. The indentation device for multilayer composite coated paper according to any one of claims 1-9, characterized in that: The translation unit includes a translation motor, a translation screw, and a translation sleeve. The translation motor is fixed on the frame and its output end is fixedly connected to the translation screw along the same axis. The translation screw is axially parallel to a first direction and is threadedly connected to the translation sleeve. The translation sleeve is connected to the elastic unit.

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