Efficient coating production line for anti-fog film

Abstract

The invention relates to the technical field of anti-fog film production, and discloses an anti-fog film efficient coating production line, which comprises a bottom plate, and further comprises an unwinding roller used for releasing a film and mounted on the bottom plate; the winding roller is used for collecting the coated anti-fog film, and the winding roller is also mounted on the bottom plate; the coating box is used for containing coating liquid, the coating box is fixedly installed on the upper surface of the bottom plate, and a guide assembly for guiding a thin film is installed in the coating box; and the coating liquid circulating mechanism is used for circulating the coating liquid in the coating box and preventing the coating liquid from precipitating. During film coating operation, the circulating pump sucks in upper-layer coating liquid in the coating box through the liquid inlet pipe and then discharges the upper-layer coating liquid into the bottom of the coating box through the liquid outlet hose, circulation of the coating liquid in the coating box is achieved, and the situation that the coating liquid precipitates, and the uniformity of film coating is affected is avoided.

Description

Technical Field

[0001] This invention relates to the field of anti-fog film production technology, and in particular to an efficient anti-fog film coating production line. Background Technology

[0002] BOPP film production involves first forming molten polypropylene into sheets or thick films using a narrow die head. Then, in a specialized stretching machine, it is stretched simultaneously or in stages in two perpendicular directions (longitudinal and transverse) at specific temperatures and speeds. The resulting film undergoes appropriate cooling, heat treatment, or special processing such as corona treatment or coating. BOPP film is widely used, with films for packaging fresh produce and fruits requiring higher performance characteristics, such as anti-fogging and antibacterial properties. Anti-fogging films are designed to prevent water vapor from forming on the film surface and affecting transparency.

[0003] An existing thin film coating apparatus and method (publication number: CN118751474B) has at least the following drawbacks: The above-mentioned patent achieves the coating effect by immersing the film in the coating liquid in the dip pan, so that both sides of the film are covered with the coating liquid; however, when the coating liquid is used, some additives, fillers and auxiliaries are added to the coating liquid, and these additives will react with other components in the solution, causing precipitation in the coating liquid and affecting the uniformity of the film coating. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-efficiency anti-fog film coating production line.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-efficiency anti-fog film coating production line includes a base plate and also includes:

[0007] An unwinding roller for releasing the film is mounted on a base plate;

[0008] A take-up roller is used to collect the coated anti-fog film, and the take-up roller is also mounted on the base plate;

[0009] A coating box for holding coating liquid is fixedly installed on the upper surface of a base plate, and a guide assembly for guiding the film is installed inside the coating box.

[0010] The coating liquid circulation mechanism is used to circulate the coating liquid in the coating box to prevent the coating liquid from settling.

[0011] A drying mechanism is used to dry the coated film, and the drying mechanism is installed at the end of the coating box away from the unwinding roller.

[0012] As a further embodiment of the present invention, the guiding assembly includes four guide rollers rotatably mounted between the inner walls of opposite sides of the coating box, and the four guide rollers are arranged in a rectangular configuration.

[0013] As a further embodiment of the present invention, the coating liquid circulation mechanism includes a circulation pump fixedly installed on the outer surface of the coating box, an inlet pipe connected to the inside of the coating box is fixedly installed at the inlet end of the circulation pump, an outlet hose connected to the inside of the coating box is fixedly installed at the outlet end of the circulation pump, and a viscosity detection mechanism for detecting the viscosity of the coating liquid is installed on the inlet pipe.

[0014] As a further embodiment of the present invention, the viscosity detection mechanism includes a fixed cylinder eccentrically fixedly mounted on the inlet pipe, the inlet pipe being connected to the interior of the fixed cylinder, a rotating shaft being rotatably mounted through the upper surface of the fixed cylinder, a plurality of blades being uniformly fixedly mounted on the outer circumference of the rotating shaft, the blades being disposed inside the fixed cylinder, a connecting plate being fixedly mounted at the top end of the rotating shaft, a first spring rod being fixedly mounted at the top end of the connecting plate, a top plate being fixedly mounted at the telescopic end of the first spring rod, a plurality of first rotating rods being uniformly rotatably mounted on the outer circumference of the connecting plate, a plurality of second rotating rods being uniformly rotatably mounted on the outer circumference of the top plate, the first rotating rods and corresponding second rotating rods being hinged to each other, an L-shaped rod being rotatably mounted at the top end of the top plate, the L-shaped rod being slidably mounted on the outer surface of the coating box, and a detection component being mounted on the outer surface of the L-shaped rod.

[0015] As a further embodiment of the present invention, the detection assembly includes a rocker arm rotatably mounted on the end of an L-shaped rod via a torque shaft. A trigger block is fixedly mounted on the lower surface of the L-shaped rod near the rocker arm. A touch switch corresponding to the trigger block is fixedly mounted on the lower surface of the rocker arm. A second spring rod is fixedly mounted on the outer surface of the coating box near the rocker arm. A baffle is fixedly mounted on the telescopic end of the second spring rod.

[0016] As a further embodiment of the present invention, the coating box is equipped with a swing mechanism that drives the outlet hose to swing. The swing mechanism includes a support rod fixedly installed between the inner walls of opposite sides of the coating box, a rocker arm rotatably installed on the outer surface of the support rod, and the outlet hose is fixedly installed at the bottom end of the rocker arm. The coating box is equipped with a swing assembly that drives the rocker arm to swing.

[0017] As a further embodiment of the present invention, the rocking assembly includes a drive shaft that is rotatably mounted through the outer surface of the coating box, a turntable that is fixedly mounted at one end of the drive shaft, a guide post that is fixedly mounted on the outer surface of the turntable, a through groove that is opened through the outer surface of the rocker arm, the guide post that is slidably mounted to the inner wall of the through groove, and a transmission assembly that is installed between the drive shaft and the turntable.

[0018] As a further embodiment of the present invention, the transmission assembly includes a driven bevel gear fixedly installed at the end of the transmission shaft away from the turntable, and a driving bevel gear fixedly installed at the bottom end of the rotating shaft, wherein the driving bevel gear meshes with the driven bevel gear.

[0019] As a further embodiment of the present invention, the drying mechanism includes two hot air blowers arranged vertically opposite each other. The two hot air blowers are fixedly installed on the outer surface of the coating box. Two extrusion rollers are rotatably installed between the inner walls of opposite sides of the coating box, and a gap is left between the two extrusion rollers for the film to pass through.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. During the film coating operation, the circulation pump draws in the upper coating liquid in the coating tank through the inlet pipe and then discharges it to the bottom of the coating tank through the outlet hose, thereby realizing the circulation of the coating liquid in the coating tank and avoiding sedimentation of the coating liquid, which would affect the uniformity of film coating.

[0022] 2. When the viscosity of the coating liquid increases, the flow rate of the coating liquid through the fixed cylinder slows down, which slows down the rotation speed of the shaft. This reduces the centrifugal force on the first and second rotating rods. Under the elastic force of the first spring rod, the top plate is pushed upward, causing the L-shaped rod and the rocker arm to move upward. After the rocker arm abuts against the lower surface of the baffle, the rocker arm is pushed downward, allowing the touch switch installed at the bottom of the rocker arm to move closer to the trigger block. After the touch switch contacts the trigger block, the touch switch activates the external alarm, reminding the operator that the viscosity of the coating liquid has increased and that it needs to be replaced or remixed in time to ensure the uniformity and coating effect of the film coating.

[0023] 3. As the rotating shaft rotates, it drives the active bevel gear to rotate, which in turn drives the driven bevel gear meshing with it to rotate. The driven bevel gear then drives the transmission shaft to rotate, which in turn drives the turntable to rotate. This allows the guide post mounted on the turntable to drive the rocker arm to swing back and forth with the support rod as the fulcrum through the through groove. The rocker arm then drives the outlet hose to swing back and forth, so that the coating liquid discharged from the outlet hose can be evenly dispersed at the bottom of the coating box, improving the uniformity of coating liquid mixing. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an anti-fog film high-efficiency coating production line proposed in this invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of the coating box in an anti-fog film high-efficiency coating production line proposed in this invention.

[0026] Figure 3 This is a schematic diagram of the internal structure of the fixed cylinder of an anti-fog film high-efficiency coating production line proposed in this invention;

[0027] Figure 4 This is a schematic diagram of the rotating shaft structure of an anti-fog film high-efficiency coating production line proposed in this invention;

[0028] Figure 5 for Figure 2 Enlarged view of the structure at point A in the middle;

[0029] Figure 6 for Figure 3 Enlarged view of the structure at point B in the middle.

[0030] In the diagram: 1. Base plate; 2. Unwinding roller; 3. Rewinding roller; 4. Coating box; 5. Guide roller; 6. Extrusion roller; 7. Circulating pump; 8. Inlet pipe; 9. Outlet hose; 10. Fixed cylinder; 11. Rotating shaft; 12. Blade; 13. Connecting plate; 14. First rotating rod; 15. First spring rod; 16. Top plate; 17. Second rotating rod; 18. Slide groove; 19. L-shaped rod; 20. Slider; 21. Rocker arm; 22. Trigger block; 23. Touch switch; 24. Second spring rod; 25. Baffle; 26. Support rod; 27. Rocker arm; 28. Through groove; 29. ​​Drive shaft; 30. Turntable; 31. Guide column; 32. Driven bevel gear; 33. Driving bevel gear; 34. Hot air blower. Detailed Implementation

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] See attached document Figure 1 -Appendix Figure 6 A high-efficiency anti-fog film coating production line, including a base plate 1, and further including:

[0034] Unwind roller 2 is used to release the film and is mounted on base plate 1; take-up roller 3 is used to collect the coated anti-fog film and is also mounted on base plate 1; the speed of unwind roller 2 and take-up roller 3 is controlled by servo motor.

[0035] The coating box 4 is used to hold the coating liquid. The coating box 4 is fixedly installed on the upper surface of the base plate 1. A guide assembly for guiding the film is installed inside the coating box 4. A coating liquid circulation mechanism is used to circulate the coating liquid in the coating box 4 to prevent sedimentation. A drying mechanism is used to dry the coated film. The drying mechanism is installed at the end of the coating box 4 away from the unwinding roller 2. The drying mechanism includes two hot air blowers 34 arranged vertically opposite each other. The two hot air blowers 34 are fixedly installed on the outer surface of the coating box 4. Two extrusion rollers 6 are rotatably installed between the inner walls of opposite sides of the coating box 4, with a gap between the two extrusion rollers 6 for the film to pass through. The guide assembly includes four guide rollers 5 rotatably installed between the inner walls of opposite sides of the coating box 4, arranged in a rectangular pattern.

[0036] In use, the film on the unwinding roller 2 is passed sequentially through four guide rollers 5 and then through two extrusion rollers 6. After passing through two hot air blowers 34, the film is connected to the take-up roller 3, so that the unwinding roller 2 and the take-up roller 3 cooperate to unwind and take up respectively. The film passing through the coating box 4 is soaked in the coating liquid in the coating box 4, so that the surface of the film is coated with anti-fog coating liquid. Then, the two extrusion rollers 6 squeeze the coating liquid on the surface of the film to remove excess coating liquid. The film passing through the two hot air blowers 34 is dried, so that the coating liquid adheres to the surface of the film, completing the anti-fog coating treatment of the film.

[0037] In this embodiment, the coating liquid circulation mechanism includes a circulation pump 7 fixedly installed on the outer surface of the coating box 4. The inlet end of the circulation pump 7 is fixedly installed with an inlet pipe 8 that communicates with the inside of the coating box 4. The outlet end of the circulation pump 7 is fixedly installed with an outlet hose 9 that communicates with the inside of the coating box 4. A viscosity detection mechanism for detecting the viscosity of the coating liquid is installed on the inlet pipe 8.

[0038] During the film coating operation, the circulation pump 7 draws in the upper coating liquid from the coating tank 4 through the inlet pipe 8, and then discharges it into the bottom of the coating tank 4 through the outlet hose 9, thereby realizing the circulation of the coating liquid in the coating tank 4 and preventing the coating liquid from settling, which would affect the uniformity of film coating.

[0039] In this embodiment, the viscosity detection mechanism includes a fixed cylinder 10 eccentrically fixed on the inlet pipe 8, the inlet pipe 8 being connected to the interior of the fixed cylinder 10, a rotating shaft 11 being rotatably mounted through the upper surface of the fixed cylinder 10, a plurality of blades 12 being uniformly fixedly mounted on the outer circumference of the rotating shaft 11, the blades 12 being disposed inside the fixed cylinder 10, a connecting plate 13 being fixedly mounted at the top end of the rotating shaft 11, a first spring rod 15 being fixedly mounted at the top end of the connecting plate 13, a top plate 16 being fixedly mounted at the telescopic end of the first spring rod 15, a plurality of first rotating rods 14 being uniformly rotatably mounted on the outer circumference of the connecting plate 13, and a plurality of second rotating rods 17 being uniformly rotatably mounted on the outer circumference of the top plate 16, the first rotating rods 14 and the corresponding second rotating rods 17 being hinged to each other, and the top plate 16... An L-shaped rod 19 is rotatably mounted on the top of the coating box 4. The L-shaped rod 19 is slidably mounted on the outer surface of the coating box 4. A groove 18 is provided on the outer surface of the coating box 4. A slider 20 matching the groove 18 is fixedly mounted on the outer surface of the L-shaped rod 19. The slider 20 is slidably mounted on the inner wall of the groove 18. A detection component is mounted on the outer surface of the L-shaped rod 19. The detection component includes a rocker arm 21 rotatably mounted on the end of the L-shaped rod 19 via a torque shaft. A trigger block 22 is fixedly mounted on the lower surface of the L-shaped rod 19 near the rocker arm 21. A touch switch 23 corresponding to the trigger block 22 is fixedly mounted on the lower surface of the rocker arm 21. A second spring rod 24 is fixedly mounted on the outer surface of the coating box 4 near the rocker arm 21. A baffle 25 is fixedly mounted on the telescopic end of the second spring rod 24.

[0040] When the coating liquid in the inlet pipe 8 is at normal viscosity and flows through the fixed cylinder 10, the flowing coating liquid will drive the rotating shaft 11 to rotate through the blade 12, causing the rotating shaft 11 to drive the connecting plate 13 to rotate. The connecting plate 13 will drive the top plate 16 to rotate through the first rotating rod 14 and the second rotating rod 17. When the first rotating rod 14 and the second rotating rod 17 are rotated, the connection end is thrown outward due to centrifugal force, causing the top plate 16 to drive the L-shaped rod 19 to move downward. At the same time as the L-shaped rod 19 moves downward, it will drive the rocker arm 21 to move downward. Since the rocker arm 21 and the L-shaped rod 19 are rotated and installed through the torque rotating shaft, after the rocker arm 21 comes into contact with the baffle 25, the rocker arm 21 is pushed upward, so that the rocker arm 21 can pass over the baffle 25. At this time, the trigger block 22 and the touch switch 23 are not in contact.

[0041] As the coating liquid continues to be used and its viscosity increases, the flow rate of the coating liquid through the fixed cylinder 10 slows down, causing the rotation speed of the rotating shaft 11 to decrease. This reduces the centrifugal force on the first rotating rod 14 and the second rotating rod 17. Under the elastic force of the first spring rod 15, the top plate 16 is pushed upward, causing the L-shaped rod 19 and the rocker arm 21 to move upward. After the rocker arm 21 abuts against the lower surface of the baffle 25, the rocker arm 21 is pushed downward, allowing the touch switch 23 installed at the bottom of the rocker arm 21 to move closer to the trigger block 22. After the touch switch 23 contacts the trigger block 22, the touch switch 23 activates the external alarm, reminding the operator that the viscosity of the coating liquid has increased and that it needs to be replaced or remixed in time to ensure the uniformity and coating effect of the film coating.

[0042] In this embodiment, the coating box 4 is equipped with a swing mechanism that drives the outlet hose 9 to swing. The swing mechanism includes a support rod 26 fixedly installed between the inner walls of opposite sides of the coating box 4. A rocker arm 27 is rotatably installed on the outer surface of the support rod 26. The outlet hose 9 is fixedly installed at the bottom end of the rocker arm 27. The coating box 4 is equipped with a swing assembly that drives the rocker arm 27 to swing. The swing assembly includes a drive shaft 29 that is rotatably installed through the outer surface of the coating box 4. A turntable 30 is fixedly installed at one end of the drive shaft 29. A guide post 31 is fixedly installed on the outer surface of the turntable 30. A through groove 28 is opened through the outer surface of the rocker arm 27. The guide post 31 is slidably installed on the inner wall of the through groove 28. A transmission assembly is installed between the drive shaft 29 and the rotating shaft 11. The transmission assembly includes a driven bevel gear 32 fixedly installed at the end of the drive shaft 29 away from the turntable 30. A driving bevel gear 33 is fixedly installed at the bottom end of the rotating shaft 11. The driving bevel gear 33 meshes with the driven bevel gear 32.

[0043] While the rotating shaft 11 rotates, it will drive the active bevel gear 33 to rotate, which in turn drives the driven bevel gear 32 that meshes with it to rotate. The driven bevel gear 32 then drives the transmission shaft 29 to rotate, which in turn drives the turntable 30 to rotate. This allows the guide post 31 installed on the turntable 30 to drive the rocker arm 27 to swing back and forth with the support rod 26 as the fulcrum through the through groove 28. This allows the rocker arm 27 to drive the outlet hose 9 to swing back and forth, so that the coating liquid discharged from the outlet hose 9 can be evenly dispersed at the bottom of the coating box 4, improving the uniformity of coating liquid mixing.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-efficiency anti-fog film coating production line, comprising a base plate (1), characterized in that, Also includes: An unwinding roller (2) is used to release the film, and the unwinding roller (2) is mounted on a base plate (1); The take-up roller (3) is used to collect the coated anti-fog film, and the take-up roller (3) is also installed on the base plate (1); Coating box (4) is used to hold coating liquid. The coating box (4) is fixedly installed on the upper surface of the base plate (1). The interior of the coating box (4) is equipped with a guide assembly for guiding the film. The coating liquid circulation mechanism is used to circulate the coating liquid in the coating box (4) to prevent the coating liquid from settling. A drying mechanism is used to dry the coated film, and the drying mechanism is installed at the end of the coating box (4) away from the unwinding roller (2).

2. The high-efficiency anti-fog film coating production line according to claim 1, characterized in that, The guiding assembly includes four guide rollers (5) rotatably mounted between the inner walls of opposite sides of the coating box (4), and the four guide rollers (5) are arranged in a rectangular pattern.

3. The high-efficiency anti-fog film coating production line according to claim 1, characterized in that, The coating liquid circulation mechanism includes a circulation pump (7) fixedly installed on the outer surface of the coating box (4). The inlet end of the circulation pump (7) is fixedly installed with an inlet pipe (8) that communicates with the inside of the coating box (4). The outlet end of the circulation pump (7) is fixedly installed with an outlet hose (9) that communicates with the inside of the coating box (4). A viscosity detection mechanism for detecting the viscosity of the coating liquid is installed on the inlet pipe (8).

4. The high-efficiency anti-fog film coating production line according to claim 3, characterized in that, The viscosity detection mechanism includes a fixed cylinder (10) eccentrically fixed on the inlet pipe (8), the inlet pipe (8) being connected to the interior of the fixed cylinder (10), a rotating shaft (11) being rotatably mounted through the upper surface of the fixed cylinder (10), a plurality of blades (12) being uniformly fixedly mounted on the outer circumference of the rotating shaft (11), the blades (12) being disposed inside the fixed cylinder (10), a connecting plate (13) being fixedly mounted at the top end of the rotating shaft (11), and a first spring rod (15) being fixedly mounted at the top end of the connecting plate (13). A top plate (16) is fixedly installed at the telescopic end of a spring rod (15). Multiple first rotating rods (14) are evenly rotatably installed on the outer periphery of the connecting plate (13). Multiple second rotating rods (17) are evenly rotatably installed on the outer circumference of the top plate (16). The first rotating rods (14) and the corresponding second rotating rods (17) are hinged to each other. An L-shaped rod (19) is rotatably installed at the top of the top plate (16). The L-shaped rod (19) is slidably installed on the outer surface of the coating box (4). A detection component is installed on the outer surface of the L-shaped rod (19).

5. The high-efficiency anti-fog film coating production line according to claim 4, characterized in that, The detection assembly includes a rocker arm (21) rotatably mounted on the end of an L-shaped rod (19) via a torque shaft. A trigger block (22) is fixedly mounted on the lower surface of the L-shaped rod (19) near the rocker arm (21). A touch switch (23) corresponding to the trigger block (22) is fixedly mounted on the lower surface of the rocker arm (21). A second spring rod (24) is fixedly mounted on the outer surface of the coating box (4) near the rocker arm (21). A baffle (25) is fixedly mounted on the telescopic end of the second spring rod (24).

6. The high-efficiency anti-fog film coating production line according to claim 5, characterized in that, The coating box (4) is equipped with a swing mechanism that drives the outlet hose (9) to swing. The swing mechanism includes a support rod (26) fixedly installed between the inner walls of opposite sides of the coating box (4). A rocker arm (27) is rotatably installed on the outer surface of the support rod (26). The outlet hose (9) is fixedly installed at the bottom end of the rocker arm (27). The coating box (4) is equipped with a swing assembly that drives the rocker arm (27) to swing.

7. The high-efficiency anti-fog film coating production line according to claim 6, characterized in that, The rocking assembly includes a drive shaft (29) that is rotatably mounted on the outer surface of the coating box (4). A turntable (30) is fixedly mounted on one end of the drive shaft (29). A guide post (31) is fixedly mounted on the outer surface of the turntable (30). A through groove (28) is opened through the outer surface of the rocker arm (27). The guide post (31) is slidably mounted on the inner wall of the through groove (28). A transmission assembly is installed between the drive shaft (29) and the rotating shaft (11).

8. The high-efficiency anti-fog film coating production line according to claim 7, characterized in that, The transmission assembly includes a driven bevel gear (32) fixedly installed at the end of the transmission shaft (29) away from the turntable (30), and a driving bevel gear (33) fixedly installed at the bottom end of the rotating shaft (11), the driving bevel gear (33) meshing with the driven bevel gear (32).

9. The high-efficiency anti-fog film coating production line according to claim 1, characterized in that, The drying mechanism includes two hot air blowers (34) arranged vertically opposite each other. The two hot air blowers (34) are fixedly installed on the outer surface of the coating box (4). Two extrusion rollers (6) are rotatably installed between the inner walls of opposite sides of the coating box (4). A gap is left between the two extrusion rollers (6) for the film to pass through.

Images