Double-sided laminating machine

Abstract

The invention relates to a double-sided laminating machine. Comprising a support frame and a laminating device for laminating paper, two groups of film spraying devices which are arranged in a linear array are mounted on the support frame; a collecting tank is installed at the bottom end of the supporting frame. The problems that in the prior art, in the process that plastic particles are coated on the surface of paper through a laminating machine, hot-melted plastic particles are prone to adhering to the surface of a roller of the laminating machine, so that the surface of the laminated paper subjected to laminating is uneven and uneven, the processing quality of the laminated paper is affected, and if thermoplastic materials of the roller of the laminating machine are manually cleaned, the processing quality of the laminated paper is affected are solved. The technical problems that in the prior art, the labor intensity is large, the danger coefficient is high, excessive residual plastic coating materials on the outer surface of the roller of the laminating machine cannot be cleaned up, and plastic coating is not uniform in laminating paper processing are solved.

Description

Technical Field

[0001] The invention relates to the field of laminating machines, in particular to a double-sided laminating machine. Background Art

[0002] Laminated paper is a composite material made by coating plastic particles on the surface of paper through a laminating machine. The main features of this composite material are that it is oil-proof, waterproof and heat-sealed. Different uses take different features: when used to package hamburgers, take its oil-proof feature. When used for coated paper packaging, take its waterproof feature. When used for automatic packaging machine packaging, take its heat-sealing feature. Laminated paper is mainly divided into: single-plastic laminated paper and double-plastic laminated paper. Single-plastic laminated paper is laminated on one side, and double-plastic laminated paper is laminated on both sides.

[0003] In the process of laminating machine coating plastic particles on the surface of paper, the hot melted plastic particles are easy to stick to the surface of the laminating machine roller, resulting in uneven surface of the laminated paper, affecting the processing quality of the laminated paper. Manual cleaning of the thermoplastic material on the laminating machine roller is labor-intensive and risk-prone, and the excess thermoplastic material on the outer surface of the laminating machine roller cannot be cleaned up, resulting in uneven plastic coating of the laminated paper. Summary of the invention

[0004] The embodiment of the present application provides a double-sided laminating machine to solve the problem that in the prior art solution, during the process of the laminating machine coating plastic particles on the surface of paper, the hot-melted plastic particles are easily adhered to the surface of the laminating machine roller, resulting in an uneven and uneven surface of the laminated paper, which affects the processing quality of the laminated paper. If the thermoplastic material on the laminating machine roller is cleaned manually, the labor intensity is high and the risk factor is high. In addition, the excess thermoplastic material on the outer surface of the laminating machine roller cannot be cleaned up, resulting in uneven plastic coating of the laminated paper.

[0005] The technical solution adopted in the embodiment of the present application is as follows:

[0006] A double-sided laminating machine comprises a support frame and a laminating device for laminating paper; the support frame is provided with two groups of the laminating devices arranged in a linear array; the bottom end of the support frame is provided with a collecting tank;

[0007] The laminating device includes a laminating roller for laminating paper, a first driving device for driving the laminating roller to rotate, a laminating frame installed on the supporting frame, a cleaning device for cleaning the thermoplastic material on the surface of the laminating roller, and a moving component for driving the cleaning device to move back and forth; the laminating roller is rotatably connected to the bottom end of the laminating frame; the first driving device is installed at the bottom end of the laminating frame, and the first driving device is transmission-connected to the laminating roller; the moving component is installed at the top of the laminating frame; the cleaning device is installed on the moving end of the moving component; one side of the lower end of the laminating frame is rotatably connected to two groups of symmetrically placed feed rollers; the other side of the lower end of the laminating frame is rotatably connected to two groups of symmetrically placed discharge rollers.

[0008] A further technical solution is: the laminating device also includes a cleaning device; the cleaning devices are respectively installed at both ends of the top of the laminating frame; the cleaning device includes a liquid storage tank, an automatic nozzle for spraying cleaning liquid and a liquid inlet pipe for injecting cleaning liquid; the liquid storage tank is installed on one side of the top of the laminating frame; a plurality of groups of automatic nozzles arranged in a linear array are arranged at the bottom of the liquid storage tank; each group of automatic nozzles is facing the laminating roller; the liquid inlet pipe is arranged at the top of the liquid storage tank.

[0009] A further technical solution is: the cleaning device includes an arc-shaped support plate, a buffer assembly for buffering the arc-shaped support plate, a wire brush for cleaning the thermoplastic material on the surface of the coating roller, an arc-shaped connecting plate for driving the arc-shaped support plate to move up and down, and a second driving device installed on the moving end of the moving assembly; the wire brush is arranged on the arc-shaped support plate; a plurality of groups of buffer assemblies arranged in a rectangular array are arranged between the arc-shaped support plate and the arc-shaped connecting plate; the arc-shaped support plate is arranged on the driving end of the second driving device.

[0010] A further technical solution is: the buffer assembly includes a spring and a telescopic rod for limiting the spring; the spring is arranged around the telescopic rod; the telescopic end of the telescopic rod is connected to the arc-shaped support plate; the other end of the telescopic rod is connected to the arc-shaped connecting plate.

[0011] A further technical solution is: the moving assembly includes a moving block, a threaded rod for driving the moving block to move back and forth, a third driving device for driving the threaded rod to rotate, ball bearings arranged at both ends of the threaded rod, and limit rails arranged on both sides of the top of the laminating frame; the moving block is threadedly connected to the threaded rod, and the two ends of the moving block slide on the two groups of limit rails respectively; the two groups of ball bearings are respectively embedded on both sides of the top of the laminating frame; the third driving device is installed on one side of the top of the laminating frame, and the output shaft of the third driving device is transmission-connected to the threaded rod.

[0012] A further technical solution is: the first driving device is a motor.

[0013] A further technical solution is: the second driving device is a cylinder.

[0014] A further technical solution is: the third driving device is a motor.

[0015] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0016] 1. Due to the use of a support frame and two sets of laminating devices for laminating paper, the two sets of laminating devices arranged in a straight line support the completion of double-sided coating of paper in a single pass, which greatly improves the efficiency compared with the traditional single-sided multiple processing, while reducing the equipment footprint. The cleaning device completely removes the residual thermoplastic material on the roller surface through the automatic reciprocating motion of the wire brush and elastic buffering, which significantly improves the surface flatness of the laminated paper and eliminates concave and convex defects. The spray design of the cleaning device further cleans the microscopic residues, and cooperates with the collection tank to achieve zero waste spillage, and the cleanliness of the workshop environment is improved. Fully automatic cleaning replaces manual operation and reduces the risk of contact with high-temperature rollers. Improved cleaning uniformity prolongs the life of the laminating roller and reduces maintenance costs. The spring-telescopic rod structure of the buffer component adapts to the slight deformation of the roller surface to ensure constant cleaning pressure and adapt to different viscosity conditions of thermoplastic materials. The laminating device can be disassembled and maintained independently, and the flexibility of production line switching is enhanced, which is suitable for the rapid conversion of single-plastic / double-plastic laminated paper. Through mechatronic design, this solution overcomes the three major industry pain points in the laminating process: coating uniformity, equipment self-cleaning, and manual dependence, and has significant industrial value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a double-sided laminating machine in an embodiment of the present invention.

[0018] Figure 2 It is a partial structural schematic diagram of a coating device in an embodiment of the present invention.

[0019] Figure 3 It is a partial structural schematic diagram for reflecting the cleaning device in an embodiment of the present invention.

[0020] Figure 4 It is a partial structural schematic diagram for reflecting the cleaning device in an embodiment of the present invention.

[0021] Figure 5 It is a partial structural schematic diagram for reflecting the buffer component in an embodiment of the present invention.

[0022] In the figure: 1. support frame; 2. coating device; 21. coating roller; 22. first driving device; 23. coating frame; 24. cleaning device; 241. arc-shaped support plate; 242. buffer assembly; 2421. spring; 2422. telescopic rod; 243. wire brush; 244. arc-shaped connecting plate; 245. second driving device; 25. moving assembly; 251. moving block; 252. threaded rod; 253. third driving device; 254. ball bearing; 255. limit rail; 26. feed roller; 27. discharge roller; 28. cleaning device; 281. liquid storage box; 282. automatic nozzle; 283. liquid inlet pipe; 3. collecting tank. DETAILED DESCRIPTION

[0023] The embodiment of the present application provides a double-sided laminating machine to solve the problem that in the prior art solution, during the process of the laminating machine coating plastic particles on the surface of paper, the hot-melted plastic particles are easily adhered to the surface of the laminating machine roller, resulting in an uneven and uneven surface of the laminated paper, which affects the processing quality of the laminated paper. If the thermoplastic material on the laminating machine roller is cleaned manually, the labor intensity is high and the risk factor is high. In addition, the excess thermoplastic material on the outer surface of the laminating machine roller cannot be cleaned up, resulting in uneven plastic coating of the laminated paper.

[0024] The technical solution in the embodiment of the present application is to solve the above problems, and the overall idea is as follows:

[0025] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] A double-sided laminating machine, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5 As shown, it includes a support frame 1 and a coating device 2 for coating paper. Two groups of coating devices 2 arranged in a linear array are installed on the support frame 1. A collecting tank 3 is installed at the bottom end of the support frame 1.

[0027] The coating device 2 includes a coating roller 21 for coating paper, a first driving device 22 for driving the coating roller 21 to rotate, a coating frame 23 installed on the support frame 1, a cleaning device 24 for cleaning the thermoplastic material on the surface of the coating roller 21, and a moving assembly 25 for driving the cleaning device 24 to move back and forth. The coating roller 21 is rotatably connected to the bottom end of the coating frame 23. The first driving device 22 is installed at the bottom end of the coating frame 23, and the first driving device 22 is transmission-connected to the coating roller 21. The moving assembly 25 is installed at the top of the coating frame 23. The cleaning device 24 is installed on the moving end of the moving assembly 25. Two groups of symmetrically placed feed rollers 26 are rotatably connected to one side of the lower end of the coating frame 23. Two groups of symmetrically placed discharge rollers 27 are rotatably connected to the other side of the lower end of the coating frame 23.

[0028] The first driving device 22 is preferably a motor. Two groups of coating devices 2 arranged in a linear array are fixedly installed on the top of the support frame 1. A collecting tank 3 is detachably fixedly installed at the bottom of the support frame 1. The coating frame 23 is fixedly connected to the support frame 1. The first driving device 22 is fixedly installed at the bottom of the coating frame 23. The moving component 25 is fixedly installed at the top of the coating frame 23. The cleaning device 24 is fixedly installed on the moving end of the moving component 25. When it is necessary to coat the paper, firstly, the paper is passed between the two groups of feed rollers 26 in one group of coating devices 2, and then the passed paper is passed along the lower end of the coating roller 21 in the coating device 2, and then the paper is passed between the two groups of discharge rollers 27 in the coating device 2, and the passed paper is passed between the two groups of feed rollers 26 in the other group of coating devices 2, and then the passed paper is passed along the top end of the coating roller 21 in the other group of coating devices 2, and then the paper is passed through the two groups of discharge rollers 27 in the other group of coating devices 2. At this time, the coating operation process can be performed on both sides of the paper at the same time by the two groups of coating rollers 21.

[0029] The coating device 2 also includes a cleaning device 28. The cleaning devices 28 are respectively installed at both ends of the top of the coating frame 23. The cleaning device 28 includes a liquid storage box 281, an automatic nozzle 282 for spraying cleaning liquid, and a liquid inlet pipe 283 for injecting cleaning liquid. The liquid storage box 281 is installed on one side of the top of the coating frame 23. A plurality of groups of automatic nozzles 282 arranged in a linear array are arranged at the bottom of the liquid storage box 281. Each group of automatic nozzles 282 faces the coating roller 21. The liquid inlet pipe 283 is arranged at the top of the liquid storage box 281.

[0030] The cleaning device 24 includes an arc-shaped support plate 241, a buffer assembly 242 for buffering the arc-shaped support plate 241, a wire brush 243 for cleaning the thermoplastic material on the surface of the coating roller 21, an arc-shaped connecting plate 244 for driving the arc-shaped support plate 241 to move up and down, and a second driving device 245 installed on the moving end of the moving assembly 25. The wire brush 243 is arranged on the arc-shaped support plate 241. A plurality of groups of buffer assemblies 242 arranged in a rectangular array are arranged between the arc-shaped support plate 241 and the arc-shaped connecting plate 244. The arc-shaped support plate 241 is arranged on the driving end of the second driving device 245. The second driving device 245 is preferably a cylinder.

[0031] The buffer assembly 242 includes a spring 2421 and a telescopic rod 2422 for limiting the spring 2421. The spring 2421 is arranged around the telescopic rod 2422. The telescopic end of the telescopic rod 2422 is connected to the arc-shaped support plate 241. The other end of the telescopic rod 2422 is connected to the arc-shaped connecting plate 244.

[0032] The moving assembly 25 includes a moving block 251, a threaded rod 252 for driving the moving block 251 to move back and forth, a third driving device 253 for driving the threaded rod 252 to rotate, ball bearings 254 arranged at both ends of the threaded rod 252, and limit rails 255 arranged at both sides of the top of the coating frame 23. The moving block 251 is threadedly connected to the threaded rod 252, and the two ends of the moving block 251 slide on the two sets of limit rails 255 respectively. The two sets of ball bearings 254 are respectively embedded on both sides of the top of the coating frame 23. The third driving device 253 is installed on one side of the top of the coating frame 23, and the output shaft of the third driving device 253 is drivingly connected to the threaded rod 252. The third driving device 253 is preferably a motor.

[0033] The paper first passes through the two symmetrical feed rollers 26 of the first set of coating devices 2, and passes along the bottom of the coating roller 21. The coating roller 21 is driven to rotate by the first drive device 22 (motor), and the molten plastic particles are evenly coated on the lower surface of the paper. Subsequently, the paper is discharged through the discharge roller 27 and enters the feed roller 26 of the second set of coating devices 2, and passes along the top of the coating roller 21 to complete the coating of the upper surface of the paper. The two sets of coating devices are arranged in a straight line to achieve double-sided continuous coating, and the production efficiency is significantly improved. During the operation of the coating roller 21, the third drive device 253 (motor) drives the threaded rod 252 to rotate, driving the moving block 251 to reciprocate horizontally along the limit rail 255. At the same time, the second drive device 245 (cylinder) pushes the arc-shaped connecting plate 244 downward, so that the wire brush 243 elastically fits the surface of the coating roller through the buffer component 242. The buffer assembly composed of the spring 2421 and the telescopic rod 2422 ensures that the wire brush 243 applies uniform pressure during cleaning to avoid rigid contact and damage to the roller surface. After cleaning, the automatic nozzle 282 of the cleaning device 28 sprays cleaning liquid from the liquid storage box 281 to flush the residual thermoplastic material, and the waste liquid and debris fall into the bottom collection tank 3 for centralized treatment. The feed roller 26 and the discharge roller 27 are arranged symmetrically to ensure stable paper tension and avoid deviation. The cleaning devices 28 at both ends of the top of the laminating frame 23 replenish the cleaning liquid through the liquid inlet pipe 283 to realize a closed-loop cleaning system. The limit rail 255 and the ball bearing 254 of the moving component 25 ensure that the cleaning device 24 moves smoothly and covers the entire length of the roller surface.

[0034] Due to the use of the support frame 1 and the two sets of coating devices 2 for coating paper, the two sets of coating devices 2 arranged in a straight line support the paper to complete double-sided coating in a single pass, which greatly improves the efficiency compared with the traditional single-sided multiple processing, and reduces the equipment footprint. The cleaning device 24 completely removes the residual thermoplastic material on the roller surface through the automatic reciprocating motion and elastic buffering of the wire brush 243, so that the surface flatness of the coated paper is significantly improved and the concave and convex defects are eliminated. The spray design of the cleaning device 28 further cleans the microscopic residues, cooperates with the collection tank 3 to achieve zero waste overflow, and improves the cleanliness of the workshop environment. Fully automatic cleaning replaces manual operation and reduces the risk of contact with high-temperature rollers. Improved cleaning uniformity prolongs the life of the coating roller and reduces maintenance costs. The spring-telescopic rod structure of the buffer component 242 adapts to the slight deformation of the roller surface to ensure constant cleaning pressure and adapt to different thermoplastic material viscosity conditions. The coating device 2 can be disassembled and maintained independently, and the flexibility of production line switching is enhanced, which is suitable for the rapid conversion of single-plastic / double-plastic coated paper. Through mechatronic design, this solution overcomes the three major industry pain points in the laminating process: coating uniformity, equipment self-cleaning, and manual dependence, and has significant industrial value.

[0035] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0036] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A double-sided laminating machine, characterized in that: It comprises a support frame (1) and a coating device (2) for coating paper; two groups of coating devices (2) arranged in a linear array are installed on the support frame (1); a collecting tank (3) is installed at the bottom end of the support frame (1); The coating device (2) comprises a coating roller (21) for coating paper, a first driving device (22) for driving the coating roller (21) to rotate, a coating frame (23) installed on the support frame (1), a cleaning device (24) for cleaning the thermoplastic material on the surface of the coating roller (21), and a moving component (25) for driving the cleaning device (24) to move back and forth; the coating roller (21) is rotatably connected to the bottom end of the coating frame (23); the first driving device (2 2) is installed at the bottom end of the coating frame (23), and the first driving device (22) is connected to the coating roller (21); the moving component (25) is installed at the top end of the coating frame (23); the cleaning device (24) is installed on the moving end of the moving component (25); one side of the lower end of the coating frame (23) is rotatably connected to two groups of symmetrically placed feed rollers (26); the other side of the lower end of the coating frame (23) is rotatably connected to two groups of symmetrically placed discharge rollers (27).

2. A double-sided laminating machine as claimed in claim 1, characterized in that: The coating device (2) also includes a cleaning device (28); the cleaning devices (28) are respectively installed at both ends of the top of the coating frame (23); the cleaning device (28) includes a liquid storage box (281), an automatic nozzle (282) for spraying cleaning liquid, and a liquid inlet pipe (283) for injecting cleaning liquid; the liquid storage box (281) is installed on one side of the top of the coating frame (23); a plurality of groups of automatic nozzles (282) arranged in a linear array are arranged at the bottom of the liquid storage box (281); each group of automatic nozzles (282) is facing the coating roller (21); the liquid inlet pipe (283) is arranged at the top of the liquid storage box (281).

3. A double-sided laminating machine as claimed in claim 1, characterized in that: The cleaning device (24) comprises an arc-shaped support plate (241), a buffer component (242) for buffering the arc-shaped support plate (241), a wire brush (243) for cleaning the thermoplastic material on the surface of the coating roller (21), an arc-shaped connecting plate (244) for driving the arc-shaped support plate (241) to move up and down, and a second driving device (245) installed on the moving end of the moving component (25); the wire brush (243) is arranged on the arc-shaped support plate (241); a plurality of groups of the buffer components (242) arranged in a rectangular array are arranged between the arc-shaped support plate (241) and the arc-shaped connecting plate (244); the arc-shaped support plate (241) is arranged on the driving end of the second driving device (245).

4. A double-sided laminating machine as claimed in claim 3, characterized in that: The buffer assembly (242) comprises a spring (2421) and a telescopic rod (2422) for limiting the spring (2421); the spring (2421) is arranged around the telescopic rod (2422); the telescopic end of the telescopic rod (2422) is connected to the arc-shaped support plate (241); and the other end of the telescopic rod (2422) is connected to the arc-shaped connecting plate (244).

5. A double-sided laminating machine as claimed in claim 3, characterized in that: The moving assembly (25) comprises a moving block (251), a threaded rod (252) for driving the moving block (251) to move back and forth, a third driving device (253) for driving the threaded rod (252) to rotate, ball bearings (254) arranged at both ends of the threaded rod (252), and limit rails (255) arranged at both sides of the top of the coating frame (23); the moving block (251) is threadedly connected to the threaded rod (252), and the two ends of the moving block (251) slide on the two groups of limit rails (255) respectively; the two groups of ball bearings (254) are respectively embedded on both sides of the top of the coating frame (23); the third driving device (253) is installed on one side of the top of the coating frame (23), and the output shaft of the third driving device (253) is drivingly connected to the threaded rod (252).

6. A double-sided laminating machine as claimed in claim 1, characterized in that: The first driving device (22) is a motor.

7. A double-sided laminating machine as claimed in claim 3, characterized in that: The second driving device (245) is a cylinder.

8. A double-sided laminating machine as claimed in claim 5, characterized in that: The third driving device (253) is a motor.

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