Gluing device for degradable food packaging coating composite paper

Abstract

The utility model discloses a gluing device for degradable food packaging coating composite paper. The gluing device comprises a machine frame, the gluing assembly comprises a gluing roller and a glue groove; the glue scraping assembly comprises a glue scraping shaft, a servo motor and an infiltration tank, and an output shaft of the servo motor is detachably connected with the glue scraping shaft; the guide assembly comprises a guide roller; the rack comprises a side frame and comprises a fixed frame and a movable frame which are detachably connected, and a fixed groove and a movable groove which are combined to form a first through hole are formed in the fixed frame and the movable frame respectively. According to the gluing device for the degradable food packaging coating composite paper, through the movable frame and the fixed frame which are detachably connected, a fixed groove and a movable groove are combined to form a first through hole allowing a glue scraping shaft to penetrate through in a sealed mode, complete axial assembling and disassembling work is not needed, and therefore the requirement for the operation space when the glue scraping shaft is replaced is lowered, and the production efficiency is improved. Therefore, the glue scraping shaft is convenient to replace, and the abrasion of the glue scraping shaft caused by the axial moving distance process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of food packaging paper production, in particular to a gluing device for degradable food packaging coated composite paper. Background Art

[0002] In the prior art, a Chinese utility model patent with announcement number CN218945499U discloses a gluing component for antibacterial coated paper, in which the output shaft of a servo motor in a driving device is detachably connected to a scraper shaft. Specifically, a docking port is provided on the scraper shaft, and a socket and a locking port connected to the socket are provided on the servo motor output shaft. The locking port and the docking port are plug-in-matched by a locking pin, and a nut is threadedly connected to the end of the locking pin.

[0003] However, in the above-mentioned device, the scraper shaft is passed through the side plates on both sides of the frame, and the side plates are an integral structure. Therefore, when loading and unloading the scraper shaft, it is necessary to pass through the two side plates in sequence along the axial direction of the docking interface, so that the loading and unloading of the scraper shaft is completely carried out in the axial direction. The length of the scraper shaft is relatively large, so when replacing the scraper shaft, the length of the operating space must be ensured to be more than twice the length of the scraper shaft, that is, the replacement of the scraper shaft requires a larger space, and during the replacement of the scraper shaft, it is easy to cause wear on the side frames and the wetting tank due to axial movement, resulting in a decrease in the scraping accuracy of the scraper shaft; in addition, in the above-mentioned device, after the scraper shaft scrapes the glue on the surface of the paper and introduces the glue into the wetting tank, when too much glue is introduced, the glue is easy to overflow the wetting tank, which, on the one hand, causes a waste of glue, and on the other hand, pollutes the production environment.

[0004] Therefore, it is necessary to improve the gluing device for coated composite paper in the prior art. Utility Model Content

[0005] The purpose of the utility model is to overcome the defects in the prior art and provide a gluing device for degradable food packaging coated composite paper, which reduces the replacement and installation operation space for maintenance, reduces the wear of the glue scraping shaft, and avoids glue waste and pollution of the production environment.

[0006] In order to achieve the above technical effects, the technical solution of the utility model is: a gluing device for degradable food packaging coated composite paper, comprising:

[0007] frame;

[0008] A glue coating assembly, the glue coating assembly comprising a glue coating roller and a glue groove, the notch of the glue groove faces upward, the glue coating roller has a horizontal axial direction and rotates around its own axis, and the bottom of the glue coating roller is arranged in the glue groove;

[0009] A scraper assembly, the scraper assembly comprising a scraper shaft, a servo motor and an infiltration tank, the axial direction of the scraper shaft is parallel to the axial direction of the glue coating roller, the output shaft of the servo motor is detachably connected to the scraper shaft coaxially, the circumferential outer edge of the scraper shaft is provided with scraper protrusions distributed along its own axial direction, the notch of the infiltration tank is upward, and the inner wall is in clearance with the circumferential outer edge of the scraper shaft;

[0010] A guide assembly, the guide assembly comprising a guide roller, the axial direction of the guide roller is parallel to the axial direction of the scraper shaft and rotates around its own axis to guide the transmission path of the composite paper to fit with the top of the scraper shaft;

[0011] The frame includes a side frame whose thickness direction is parallel to the scraper shaft, and the side frame includes a fixed frame and a movable frame that are detachably connected. The fixed frame and the movable frame are respectively provided with a fixed groove and a movable groove extending along the thickness direction of the side frame. When the fixed frame and the movable frame are connected to form the side frame, the fixed groove and the movable groove are combined to form a first through hole for the scraper shaft to pass through in a seal.

[0012] Preferably, in order to further support the stable rotation of the scraper shaft, two side frames are provided, which are respectively adjacent to the two ends of the scraper shaft.

[0013] Preferably, in order to ensure stable rotation of the scraper shaft, the cross-sections of the fixed groove and the movable groove are both semicircular.

[0014] Preferably, in order to achieve accurate docking between the movable frame and the fixed frame, a sliding guide groove and a guide bar are provided between the movable frame and the fixed frame.

[0015] Preferably, in order to facilitate the docking of the movable frame and the fixed frame, the guide groove and the guide bar both extend in the vertical direction.

[0016] Preferably, in order to prevent the movable frame from being separated from the fixed frame, a second through hole penetrating the guide groove is provided on the side wall thereof, a third through hole is provided on the guide bar, and the second through hole is plug-fitted with the third through hole via a locking pin.

[0017] Preferably, in order to further strengthen the connection between the movable frame and the fixed frame, a threaded tube coaxial with the second through hole is further provided on the side wall of the guide groove, and the locking pin is threadedly connected to the threaded tube.

[0018] Preferably, in order to avoid the glue liquid from polluting the surrounding production environment while saving the amount of glue liquid, the two sides of the infiltration groove are provided with side wings whose two ends extend to be flush with the two ends of the infiltration groove and lower than the notch of the infiltration groove, and the side wings are combined with the side walls of the infiltration groove to form an upward receiving groove, the bottom of the receiving groove is higher than the notch of the glue groove, and a reflux pipe is provided between the receiving groove and the glue groove, and the reflux pipe is used to introduce the glue liquid in the receiving groove into the glue groove.

[0019] Preferably, in order to facilitate the drainage of the glue liquid in the receiving groove into the glue groove, one end of the reflux pipe is connected to the receiving groove, and the other end extends into the glue groove or extends to just above the notch adjacent to the glue groove.

[0020] Preferably, in order to facilitate the adjustment of the scraping amount of the scraping shaft, the guide roller is connected to a translation unit, and the translation unit drives the guide roller to move radially along the guide roller to adjust the contact area between the composite paper and the scraping shaft.

[0021] To sum up, compared with the prior art, the gluing device for biodegradable food packaging coated composite paper of the utility model uses a detachably connected movable frame and a fixed frame, so that the fixed groove and the movable groove are combined to form a first through hole for the scraper shaft to seal and pass through, and there is no need to perform loading and unloading work completely along the axial direction. In this way, the requirements for operating space when replacing the scraper shaft are reduced, thereby facilitating the replacement of the scraper shaft and reducing the wear of the scraper shaft due to the axial movement distance process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2 yes Figure 1 A top view of

[0024] Figure 3 yes Figure 1 A schematic diagram of the cross-sectional structure of;

[0025] Figure 4 yes Figure 3 A front view of

[0026] Figure 5 yes Figure 1 Schematic diagram of some structures;

[0027] Figure 6 yes Figure 5 Explosion diagram of

[0028] Figure 7 yes Figure 6 A magnified view of part A;

[0029] Figure 8It is a structural schematic diagram of the infiltration tank of the utility model;

[0030] Fig. 9 yes Figure 8 A front view of

[0031] In the figure: 1. frame; 11. bottom plate; 12. side frame; 121. fixed frame; 1211. fixed groove; 1212. guide groove; 1213. second through hole; 122. movable frame; 1221. movable groove; 1222. guide strip; 1223. third through hole; 13. threaded pipe; 14. locking pin; 2. glue coating assembly; 21. glue coating roller; 22. glue groove; 3. glue scraping assembly; 31. glue scraping shaft; 311. glue scraping protrusion; 312. first plug hole; 32. servo motor; 33. wetting groove; 331. wing; 332. drain port; 34. reflux pipe; 35. confluence groove; 36. sleeve; 361. second plug hole; 37. bolt; 38. nut; 4. guide assembly; 41. guide roller; 42. translation unit. DETAILED DESCRIPTION

[0032] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0033] like Figure 1-Figure 9 As shown, the gluing device for the degradable food packaging coated composite paper of the utility model comprises:

[0034] Rack 1;

[0035] The glue coating component 2 includes a glue coating roller 21 and a glue groove 22. The notch of the glue groove 22 faces upward. The glue coating roller 21 has a horizontal axis and rotates around its own axis. The bottom of the glue coating roller 21 is arranged in the glue groove 22.

[0036] The scraper assembly 3 includes a scraper shaft 31, a servo motor 32 and a wetting groove 33. The axial direction of the scraper shaft 31 is parallel to the axial direction of the glue coating roller 21. The output shaft of the servo motor 32 is detachably connected to the scraper shaft 31 coaxially. The circumferential outer edge of the scraper shaft 31 is provided with a scraper protrusion 311 distributed along its own axial direction. The notch of the wetting groove 33 faces upward, and the inner wall and the circumferential outer edge of the scraper shaft 31 are in clearance fit.

[0037] The guide assembly 4 includes a guide roller 41, the axial direction of the guide roller 41 is parallel to the axial direction of the scraper shaft 31 and rotates around its own axis to guide the transmission path of the composite paper to fit the top of the scraper shaft 31;

[0038] The frame 1 includes a side frame 12 which is parallel to the scraper shaft 31 in the thickness direction. The side frame 12 includes a fixed frame 121 and a movable frame 122 which are detachably connected. The fixed frame 121 and the movable frame 122 are respectively provided with a fixed groove 1211 and a movable groove 1221 extending along the thickness direction of the side frame 12. When the fixed frame 121 and the movable frame 122 are connected to form the side frame 12, the fixed groove 1211 and the movable groove 1221 are combined to form a first through hole for the scraper shaft 31 to pass through in a sealed manner.

[0039] Specifically, the frame 1 includes a horizontal base plate 11 and two side frames 12 fixed above both sides of the base plate 11 and arranged vertically. The two side frames 12 are respectively adjacent to the two ends of the glue scraping shaft 31 to support the glue scraping shaft 31 to rotate stably around its own axis; the glue groove 22 is fixed just above the base plate 11, the top of the glue coating roller 21 is arranged above the notch of the glue groove 22, and the bottom is arranged between the notch and the bottom of the glue groove 22. During the actual use of the device, the glue coating roller 21 keeps rotating to dip the glue in the glue groove 22 and apply the glue to the paper attached just above the glue coating roller 21, so that a layer of glue is formed on the surface of the paper.

[0040] The scraper shaft 31 is in the shape of a circular shaft. The scraper shaft 31 is located directly above the infiltration groove 33 and rotates around its own axis on the two side frames 12. In the utility model, the axial direction of the scraper shaft 31, the axial direction of the glue coating roller 21, the length direction of the glue groove 22, and the distribution direction of the two side frames 12 are all parallel and horizontal.

[0041] When the gluing device is in operation, the unwinding roller with the paper wound thereon rotates to provide the paper to be coated with glue. During the paper transmission process, the paper first contacts the glue coating roller 21, driving the glue coating roller 21 to rotate. The glue coating roller 21 dips the glue in the glue groove 22 and smears it on the lower surface of the paper, so that a glue layer is formed on the paper. The guide roller 41 in the guide assembly 4 contacts the upper surface of the paper to guide the transmission path of the paper, so that the lower surface of the paper contacts the glue scraping shaft 31. The glue scraping shaft 31 is provided with glue scraping protrusions 311 distributed along its own axial direction. The servo motor 32 drives the glue scraping shaft 31 to rotate, so that the glue scraping shaft 31 scrapes off the excess glue on the surface of the paper, and the glue enters the outer edge of the axis of the glue scraping shaft 31 and the two adjacent glue scraping protrusions 3 11, flows along the groove and enters the wetting groove 33. The glue in the wetting groove 33 can reduce the spread of glue to the two ends of the scraper shaft 31, thereby reducing the pollution to the device and the surrounding production environment. In addition, the glue can also keep the surface of the scraper shaft 31 moist, thereby preventing the surface of the scraper shaft 31 from drying and affecting the scraping effect. Moreover, the servo motor 32 is used to drive the scraper shaft 31 to rotate, so that the rotation speed of the scraper shaft 31 can be accurately adjusted and controlled, thereby adjusting the amount of glue scraped off the paper surface. Generally speaking, the higher the rotation speed of the scraper shaft 31, the more glue can be scraped off, and correspondingly, the less glue remains on the paper surface, thereby forming a thinner glue layer.

[0042] In the gluing device of the present invention, two scraper components 3 are provided, and the surface roughness of the scraper shaft 31 in the scraper component 3 adjacent to the glue groove 22 is greater than the surface roughness of the scraper shaft 31 in the other scraper component 3. To be more specific, the two scraper shafts 31 are both American RDS coating wire rods, which are made of stainless steel wire winding. The wire rods are precisely coated and can provide a variety of coating film thicknesses to meet different experimental needs. The RDS wire rod is a wire-wound wire rod, which is a groove formed by filaments wrapped around a steel rod. The wire rod is used to prepare a wet film. The brand numbers of the two scraper shafts 31 are both RDS. The scraper shaft 31 with a larger roughness has a rod number of 16, and the scraper shaft 31 with a smaller roughness has a rod number of 10.

[0043] Through the above design, two scraper assemblies 3 are used to achieve secondary scraping of the paper, which further ensures the uniformity of glue distribution on the paper surface after scraping, thereby ensuring that a glue layer of uniform thickness is formed on the paper surface. Moreover, in the utility model, the scraper shaft 31 with different roughness is used to perform rough scraping and fine scraping on the paper respectively, while scraping off most of the glue on the paper surface, ensuring that a thin and uniform glue layer is formed on the paper surface, avoiding the final composite paper product, thereby improving the molding quality of the coated paper.

[0044] Different from the prior art, in the utility model, the first through hole on the side frame 12 for the scraper shaft 31 to pass through in a sealed manner is formed by enclosing a fixed groove 1211 on the fixed frame 121 and a movable groove 1221 on the movable frame 122. The fixed frame 121 and the movable frame 122 are detachably connected, and the end of the scraper shaft 31 is detachably connected to the output shaft of the servo motor 32.

[0045] After adopting the above technology, when replacing the scraper shaft 31, the movable frame 122 is removed from the fixed frame 121, and then the end of the scraper shaft 31 is contacted and connected with the output shaft of the servo motor 32. After the scraper shaft 31 and the servo motor 32 are disconnected, the scraper shaft 31 can be directly removed from the fixed frame 121 to complete the disassembly operation; when installing the scraper shaft 31, the scraper shaft 31 is directly placed on the two fixed frames 121, so that the scraper shaft 31 and the output shaft of the servo motor 32 are coaxial, and then the scraper shaft 31 is moved axially so that the scraper shaft 31 is connected to the output shaft of the servo motor 32, and then the fixed frame 121 is connected to the movable frame 122, and the installation operation of the scraper shaft 31 is completed.

[0046] From the above-mentioned loading and unloading of the scraper shaft 31, it can be concluded that when replacing and installing the scraper shaft 31, there is no need to completely move the scraper shaft 31 axially for loading and unloading, which greatly reduces the requirements for the operating space, thereby facilitating the replacement operation of the scraper shaft 31 and avoiding the scraping accuracy affected by the surface wear of the scraper shaft 31 caused by excessive axial movement during the replacement process.

[0047] In order to facilitate the detachable connection between the scraper shaft 31 and the output shaft of the servo motor 32, the output shaft of the servo motor 32 is integrally connected with a sleeve 36 coaxially, the sleeve 36 faces away from the servo motor 32, and a second socket 361 is provided on the sleeve 36. The axial direction of the second socket 361 is perpendicular to the axial direction of the output shaft 32 of the servo motor 32. Both ends of the scraper shaft 31 are provided with a first socket 312. The inner diameter of the first socket 312 is consistent with the inner diameter of the second socket 361. The first socket 312 and the second socket 361 are plugged in and matched by a bolt 37. The end of the bolt 37 is threadedly connected with a nut 38 to strengthen the connection between the output shaft of the servo motor 32 and the scraper shaft 31.

[0048] When connecting the scraper shaft 31 to the output end of the servo motor 32, insert either end of the scraper shaft 31 into the socket 36 so that the first socket 312 and the second socket 361 are aligned, and then pass the bolt 37 through the inside of the first socket 312 and the second socket 361, and screw the end of the bolt 37 into the nut 38 to connect the scraper shaft 31 to the servo motor.

[0049] A further improvement is that the cross-sections of the fixed groove 1211 and the movable groove 1221 are both semicircular. Specifically, the inner diameters of the cross-sections of the fixed groove 1211 and the movable groove 1221 are consistent with the outer diameter of the scraper shaft 31, ensuring that when the fixed groove 1211 and the movable groove 1221 are combined to form a first through hole, the circumferential inner wall of the first through hole can be sealed and connected with the circumferential outer edge of the end of the scraper shaft 31, so as to support the scraper shaft 31 to rotate stably around its own axis.

[0050] A further improvement is that a guide groove 1212 and a guide bar 1222 for sliding fit are provided between the movable frame 122 and the fixed frame 121 , and both the guide groove 1212 and the guide bar 1222 extend in the vertical direction.

[0051] Specifically, an opening is provided at the top of the fixed frame 121, a fixed groove 1211 is formed at the bottom of the opening, a movable groove 1221 is provided at the bottom of the movable frame 122, guide grooves 1212 extending in a vertical direction are provided on the inner walls on both sides of the opening, the guide grooves 1212 extend to the top of the fixed frame 121, and guide bars 1222 extending in a vertical direction are provided on both sides of the movable frame 122, and the guide bars 1222 are adapted to and slidably matched with the guide grooves 1212.

[0052] After adopting this structure, by slidingly cooperating between the guide bar 1222 and the guide groove 1212, the guide bar 1222 is inserted into the guide groove 1212, so that the movable groove 1221 and the fixed groove 1211 can be precisely docked to form a first through hole, thereby facilitating the assembly of the side frame 12 and the scraper shaft 31.

[0053] A further improvement is that a second through hole 1213 is provided on the side wall of the guide groove 1212 to penetrate the guide groove 1212, a third through hole 1223 is provided on the guide bar 1222, the second through hole 1213 and the third through hole 1223 are plugged into each other via a locking pin 14, a threaded tube 13 coaxial with the second through hole 1213 is also provided on the side wall of the guide groove 1212, and the locking pin 14 is threadedly connected to the threaded tube 13.

[0054] After the guide bar 1222 is inserted into the guide groove 1212, the third through hole 1223 on the guide bar 1222 is aligned with the second through hole 1213 on the side wall of the guide groove 1212. At this time, the locking pin 14 is rotated so that the locking pin 14 passes through the second through hole 1213 and the third through hole 1223, so that the fixed frame 121 and the movable frame 122 can be firmly connected to prevent the two from separating.

[0055] A further improvement is that, on both sides of the infiltration groove 33, there are provided with side wings 331 whose two ends extend to be flush with the two ends of the infiltration groove 33 and lower than the notch of the infiltration groove 33 respectively, the side wings 331 and the side walls of the infiltration groove 33 are combined to form an upward receiving groove, the bottom of the receiving groove is higher than the notch of the glue groove 22, and a reflux pipe 34 is provided between the receiving groove and the glue groove 22, and the reflux pipe 34 is used to introduce the glue liquid in the receiving groove into the glue groove 22; one end of the reflux pipe 34 is connected to the receiving groove, and the other end extends into the glue groove 22 or extends to just above the notch adjacent to the glue groove 22.

[0056] The length direction of the side wing 331 is consistent with the length direction of the infiltration groove 33. The cross-section of the side wing 331 is L-shaped. It is combined with the outer wall of the infiltration groove 33 to form a receiving groove. The bottom wall of the side wing 331 is provided with drainage ports 332 evenly spaced along its own length direction. A confluence groove 35 is fixed below the side wing 331. The two ends of the confluence groove 35 are fixedly connected to two fixing frames 121. The drainage port 332 is located directly above the notch of the confluence groove 35. A liquid outlet is provided at the bottom of the confluence groove 35. One end of the reflux pipe 34 is fixedly connected to the liquid outlet, and the other end extends to above the notch adjacent to the glue groove 22.

[0057] After adopting the above structure, the glue liquid overflowing from the infiltration groove 33 can flow into the receiving groove, flow downward through the discharge port 332 at the bottom of the side wing 331, and converge in the confluence groove 35. The converged glue liquid is discharged from the liquid outlet, flows along the reflux pipe 34, and returns to the glue groove 22. In this way, it is avoided that the glue liquid drips to the outside and causes pollution to the surrounding production environment. At the same time, the refluxed glue liquid can be re-applied to the surface of the paper, thereby saving the amount of glue liquid.

[0058] A further improvement is that the guide roller 41 is connected to a translation unit 42 , and the translation unit 42 drives the guide roller 41 to move radially along the guide roller 41 to adjust the contact area between the composite paper and the scraper shaft 31 .

[0059] Specifically, the translation unit 42 is a telescopic cylinder, the cylinder barrel of which extends upward in the vertical direction and is fixed on the side frame 12, and the piston rod is connected to the end of the guide roller 41 through a bearing.

[0060] After adopting the above structure, the height position of the guide roller 41 can be changed by the translation unit 42, and the guide roller 41 is in contact with the upper surface of the paper, thereby changing the transmission path of the paper, and then adjusting the contact area between the composite paper and the scraper shaft 31, changing the scraping amount of the scraper shaft 31, and realizing the adjustment of the glue amount and glue layer thickness on the paper surface.

[0061] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A gluing device for degradable food packaging coated composite paper, comprising: Rack (1); A glue coating component (2), the glue coating component (2) comprising a glue coating roller (21) and a glue groove (22), the notch of the glue groove (22) facing upward, the glue coating roller (21) having a horizontal axial direction and rotating around its own axis, the bottom of the glue coating roller (21) being arranged in the glue groove (22); A glue scraping assembly (3), the glue scraping assembly (3) comprising a glue scraping shaft (31), a servo motor (32) and an infiltration tank (33), the axial direction of the glue scraping shaft (31) being parallel to the axial direction of the glue coating roller (21), the output shaft of the servo motor (32) being detachably connected to the glue scraping shaft (31) coaxially, the circumferential outer edge of the glue scraping shaft (31) being provided with glue scraping protrusions (311) distributed along its own axial direction, the notch of the infiltration tank (33) being upwardly facing, the inner wall of which is in clearance fit with the circumferential outer edge of the glue scraping shaft (31); A guide assembly (4), the guide assembly (4) comprising a guide roller (41), the axial direction of the guide roller (41) being parallel to the axial direction of the scraper shaft (31) and rotating around its own axis to guide the transmission path of the composite paper to fit with the top of the scraper shaft (31); Features: The frame (1) comprises a side frame (12) whose thickness direction is parallel to the scraper shaft (31); the side frame (12) comprises a fixed frame (121) and a movable frame (122) which are detachably connected; the fixed frame (121) and the movable frame (122) are respectively provided with a fixed groove (1211) and a movable groove (1221) extending along the thickness direction of the side frame (12); when the fixed frame (121) and the movable frame (122) are connected to form the side frame (12), the fixed groove (1211) and the movable groove (1221) are combined to form a first through hole for the scraper shaft (31) to pass through in a sealed manner.

2. The gluing device for coated composite paper for degradable food packaging according to claim 1, characterized in that: Two side frames (12) are provided, respectively adjacent to the two ends of the scraper shaft (31).

3. The gluing device for coated composite paper for degradable food packaging according to claim 1, characterized in that: The cross-sections of the fixed groove (1211) and the movable groove (1221) are both semicircular.

4. The gluing device for coated composite paper for degradable food packaging according to claim 1, characterized in that: A guide groove (1212) and a guide bar (1222) for sliding fit are provided between the movable frame (122) and the fixed frame (121).

5. The gluing device for coated composite paper for degradable food packaging according to claim 4, characterized in that: The guide groove (1212) and the guide bar (1222) both extend in a vertical direction.

6. The gluing device for coated composite paper for degradable food packaging according to claim 4, characterized in that: A second through hole (1213) penetrating the guide groove (1212) is provided on the side wall thereof, a third through hole (1223) is provided on the guide bar (1222), and the second through hole (1213) and the third through hole (1223) are plug-fitted with each other via a locking pin (14).

7. The gluing device for coated composite paper for degradable food packaging according to claim 6, characterized in that: A threaded tube (13) coaxial with the second through hole (1213) is also provided on the side wall of the guide groove (1212), and the locking pin (14) is threadedly connected to the threaded tube (13).

8. The gluing device for coated composite paper for degradable food packaging according to claim 1, characterized in that: The two sides of the infiltration groove (33) are provided with side wings (331) whose two ends extend to be flush with the two ends of the infiltration groove (33) and lower than the notch of the infiltration groove (33). The side wings (331) and the side walls of the infiltration groove (33) are combined to form an upward receiving groove. The bottom of the receiving groove is higher than the notch of the glue groove (22). A reflux pipe (34) is provided between the receiving groove and the glue groove (22). The reflux pipe (34) is used to introduce the glue liquid in the receiving groove into the glue groove (22).

9. The gluing device for coated composite paper for degradable food packaging according to claim 8, characterized in that: One end of the return pipe (34) is in communication with the receiving groove, and the other end extends into the glue groove (22) or extends to just above the notch adjacent to the glue groove (22).

10. The gluing device for coated composite paper for degradable food packaging according to claim 1, characterized in that: The guide roller (41) is connected to a translation unit (42), and the translation unit (42) drives the guide roller (41) to move radially along the guide roller (41) to adjust the contact area between the composite paper and the scraper shaft (31).

Images