Film laminating device for printing machine

Abstract

The utility model discloses a laminating device for a printing machine, which relates to the technical field of printing machines and comprises a working frame, a conveying device is fixedly mounted on the working frame, vertical plates are fixedly mounted on the left side and the right side of the working frame, a cross beam is fixedly mounted at the top ends of the vertical plates, and a lifting device is fixedly mounted on the cross beam. And a first lifting plate is fixedly mounted at the output end of the lifting device. The adjustable buffer assembly is arranged, the hand wheel is manually rotated, the hand wheel drives the threaded rod to move axially, when a thick film or a hard film needs to be treated, an operator clockwise rotates the hand wheel to drive the threaded rod to move downwards, the gland downwards compresses the spring accordingly, and the pre-tightening force of the spring acting on the telescopic column and the second lifting plate is increased; on the contrary, when the thin film or the soft film is processed, the hand wheel is rotated anticlockwise to enable the threaded rod to ascend, and the pre-tightening force of the spring is reduced accordingly, so that the film laminating device obtains the initial downward pressure matched with the characteristics of the thin film before being in contact with the printing stock.

Description

Technical Field

[0001] This utility model relates to the field of printing press technology, and in particular to a coating device for printing presses. Background Technology

[0002] In the printing industry, lamination has become an important post-printing process to enhance the visual appeal, durability, and stain resistance of printed materials. This process involves covering the surface of the printed material with a transparent plastic film, which is then firmly bonded to the material by an adhesive under pressure and heat.

[0003] A search revealed a utility model patent with authorization announcement number CN213798747U, which discloses a laminating device for a label printing machine. The device includes a base plate. From left to right, a support column, a second fixing rod, a first motor, and another first fixing rod are fixedly connected to the top of the base plate. A controller is fixedly connected to the front surface of the support column. A support frame is fixedly connected to the top of the support column. An adjusting column is fixedly connected to the top of the support frame. A sliding groove is provided on one side of the adjusting column. A second motor is fixedly connected to the bottom of the inner cavity of the adjusting column. By activating the second motor, the threaded rod rotates, causing the sliding block to move up and down. This, in turn, causes the connecting rod to move the support rod up and down, ultimately allowing the support rod to move the laminating structure up and down. This allows adjustment of the height of the film unwinding roller, facilitating laminating of printed products of different thicknesses and greatly improving the device's applicability.

[0004] Although the prior art uses the reverse force provided by the spring when compressed to reduce the impact force of the film unwinding roller during lamination, some thick or hard films require a large initial pressure to ensure adhesion to the substrate and smooth rotation of the film roll. Insufficient preload can lead to incomplete lamination, wrinkling, or even the film roll stopping. For thin or soft films, excessive preload can overstretch or even break the film, resulting in waste and production interruption. Therefore, the initial pressure of the film unwinding roller needs to be set according to different types of films. In view of this, this application proposes a lamination device for a printing press based on the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a coating device for printing presses.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A laminating device for a printing machine includes a work frame, on which a conveying device is fixedly installed. Vertical plates are fixedly installed on both the left and right sides of the work frame. A crossbeam is fixedly installed at the top of the vertical plates. A lifting device is fixedly installed on the crossbeam. A first lifting plate is fixedly installed at the output end of the lifting device. A second lifting plate is provided below the first lifting plate. An adjustable buffer assembly is provided between the second lifting plate and the first lifting plate.

[0008] The adjustable buffer assembly includes a fixed cylinder fixedly installed on the lower surface of the first lifting plate and a telescopic column fixedly installed on the upper surface of the second lifting plate. A handwheel is rotatably installed at the bottom of the fixed cylinder, and a threaded rod is threadedly connected to the middle position of the handwheel. A sleeve is slidably installed on the outside of the telescopic column. The bottom end of the threaded rod passes through the sleeve and is fixedly installed with a pressure cap. A spring is provided between the pressure cap and the telescopic column.

[0009] A film unwinding roller is connected below the second lifting plate.

[0010] Furthermore, four mounting plates are fixedly installed on the lower surface of the second lifting plate, and the film unwinding roller is rotatably installed between two of the mounting plates, while an electric heating roller is rotatably installed between the other two mounting plates.

[0011] Furthermore, the conveying device includes a frame, with a drive roller and a driven roller rotatably mounted on the left and right ends of the frame, respectively. A conveyor belt is driven between the driven roller and the drive roller. A support frame is fixedly mounted on the work frame, and a motor is fixedly mounted on the support frame. A drive wheel is fixedly mounted on the output end of the motor. A driven wheel is fixedly mounted on one end of the drive roller, and a drive belt is driven between the driven wheel and the drive wheel.

[0012] Furthermore, a bearing seat is fixedly installed on the work frame, and a rotating shaft is rotatably installed on the bearing seat. A tension wheel is fixedly installed at one end of the rotating shaft, and the tension wheel is attached to the inner side of the transmission belt.

[0013] Furthermore, the work frame is provided with a through groove, and a bolt is rotatably installed on the bearing seat. One end of the bolt passes through the through groove and is threaded with a nut.

[0014] Furthermore, the lifting device is an electric telescopic rod.

[0015] Furthermore, the fixed cylinder is provided with an observation groove that runs through the front and back.

[0016] Furthermore, a guide rod is fixedly installed on the upper surface of the first lifting plate, and a limit block is fixedly installed at the top end of the guide rod.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. This utility model, by setting an adjustable buffer component, allows manual rotation of the handwheel, which drives the threaded rod to move axially. When processing thick or hard films, the operator rotates the handwheel clockwise, causing the threaded rod to move downwards. The pressure cap then compresses the spring downwards, increasing the preload force of the spring acting on the telescopic column and the second lifting plate. Conversely, when processing thin or soft films, rotating the handwheel counterclockwise causes the threaded rod to rise, reducing the spring preload force. This ensures that the laminating device obtains an initial downward pressure matching the film characteristics before contacting the substrate.

[0019] 2. This utility model incorporates a film unwinding roller and an electric heating roller. The electric heating roller, installed together with the film unwinding roller below the second lifting plate, follows closely behind. The electric heating roller heats and rolls the newly laminated film. The heat can activate certain types of film adhesive layers or make the film itself more elastic. Rolling can further eliminate residual air between the film and the printed material, completely eliminating air bubbles, making the lamination bond stronger and the surface smoother and cleaner, greatly improving the final quality and visual effect of the laminated product.

[0020] 3. This utility model, by setting up a telescopic column and a spring, uses a lifting device to push the first lifting plate, the second lifting plate, and the film unwinding roller downwards until the film on the unwinding roller contacts the surface of the printed material conveyed by the conveying device. When the unwinding roller contacts the substrate and continues to press down, the unevenness or slight change in thickness of the substrate surface will cause the laminating roller to be subjected to an upward impact force. At this time, the second lifting plate tends to move upwards, thereby pushing the telescopic column to slide upwards in the sleeve and compressing the spring. This dynamic buffering effect eliminates rigid impact and protects the printed material from being crushed. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a coating device for a printing press proposed in this utility model;

[0022] Figure 2 This is a schematic diagram of an adjustable buffer component for a laminating device for a printing press, as proposed in this utility model.

[0023] Figure 3 This is a schematic diagram of the internal structure of the sleeve of a coating device for a printing machine proposed in this utility model;

[0024] Figure 4 This is a schematic diagram of the tensioning wheel of a laminating device for a printing press according to the present invention;

[0025] Figure 5 This is a schematic diagram of a conveyor belt for a laminating device for a printing press according to the present invention;

[0026] Figure 6 This is a schematic diagram of a bearing housing for a coating device for a printing press, as proposed in this utility model.

[0027] In the diagram: 1. Work frame; 2. Conveying device; 3. Vertical plate; 4. Horizontal beam; 5. Lifting device; 6. First lifting plate; 7. Second lifting plate; 8. Fixed cylinder; 9. Telescopic column; 10. Handwheel; 11. Threaded rod; 12. Sleeve; 13. Pressure cap; 14. Spring; 15. Film unwinding roller; 16. Mounting plate; 17. Electric heating roller; 18. Frame; 19. Driven roller; 20. Driven roller; 21. Conveyor belt; 22. Support frame; 23. Motor; 24. Drive wheel; 25. Driven wheel; 26. Transmission belt; 27. Bearing seat; 28. Rotating shaft; 29. ​​Tensioning wheel; 30. Through groove; 31. Bolt; 32. Nut; 33. Observation slot; 34. Guide rod; 35. Limit block. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] Reference Figure 1-3 A laminating device for a printing machine includes a work frame 1, a conveying device 2 fixedly installed on the work frame 1, vertical plates 3 fixedly installed on both the left and right sides of the work frame 1, a crossbeam 4 fixedly installed at the top of the vertical plates 3, a lifting device 5 fixedly installed on the crossbeam 4, a first lifting plate 6 fixedly installed at the output end of the lifting device 5, a second lifting plate 7 arranged below the first lifting plate 6, and an adjustable buffer assembly arranged between the second lifting plate 7 and the first lifting plate 6.

[0030] The adjustable buffer assembly includes a fixed cylinder 8 fixedly installed on the lower surface of the first lifting plate 6 and a telescopic column 9 fixedly installed on the upper surface of the second lifting plate 7. A handwheel 10 is rotatably installed at the bottom of the fixed cylinder 8. A threaded rod 11 is threadedly connected to the middle position of the handwheel 10. A sleeve 12 is slidably installed on the outside of the telescopic column 9. The bottom end of the threaded rod 11 passes through the sleeve 12 and is fixedly installed with a pressure cap 13. A spring 14 is provided between the pressure cap 13 and the telescopic column 9.

[0031] The operator manually rotates the handwheel 10, which drives the threaded rod 11 to move axially. When processing thick or hard films, the operator rotates the handwheel 10 clockwise, causing the threaded rod 11 to move downward. The pressure cap 13 then compresses the spring 14 downward, increasing the preload force of the spring 14 on the telescopic column 9 and the second lifting plate 7. Conversely, when processing thin or soft films, the operator rotates the handwheel 10 counterclockwise, causing the threaded rod 11 to rise. The preload force of the spring 14 then decreases, so that the laminating device obtains an initial downward pressure that matches the characteristics of the film before contacting the substrate.

[0032] The second lifting plate 7 is connected to a film unwinding roller 15 below it;

[0033] After the pre-tensioned spring 14 has completed its elasticity, the lifting device 5 pushes the first lifting plate 6, the second lifting plate 7, and the film unwinding roller 15 down until the film on the film unwinding roller 15 contacts the surface of the printed material conveyed by the conveying device 2. When the film unwinding roller 15 contacts the substrate and continues to press down, the unevenness or slight change in thickness of the substrate surface will cause the laminating roller to be subjected to an upward impact force. At this time, the second lifting plate 7 tends to move upward, thereby pushing the telescopic column 9 to slide upward in the sleeve 12, and the spring 14 is compressed. This dynamic buffering effect eliminates the rigid impact and protects the printed material from being crushed.

[0034] Reference Figure 1-2 Specifically: four mounting plates 16 are fixedly installed on the lower surface of the second lifting plate 7, the film unwinding roller 15 is rotatably installed between two of the mounting plates 16, and an electric heating roller 17 is rotatably installed between the other two mounting plates 16;

[0035] The electric heating roller 17, which is installed below the second lifting plate 7 along with the film unwinding roller 15, follows closely behind. The electric heating roller 17 heats and rolls the newly laminated film. The heat can activate certain types of film adhesive layers or make the film itself more elastic. Rolling can further eliminate residual air between the film and the printed matter, completely eliminate air bubbles, make the lamination bond stronger, and make the surface smoother and cleaner, greatly improving the final quality and visual effect of the laminated product.

[0036] Reference Figure 1 , Figure 4-5 Specifically: the conveying device 2 includes a frame 18, with a drive roller 19 and a driven roller 20 rotatably mounted on the left and right ends of the frame 18, respectively. A conveyor belt 21 is connected between the driven roller 20 and the drive roller 19. A support frame 22 is fixedly mounted on the work frame 1, and a motor 23 is fixedly mounted on the support frame 22. A drive wheel 24 is fixedly mounted on the output end of the motor 23. A driven wheel 25 is fixedly mounted on one end of the drive roller 19, and a transmission belt 26 is connected between the driven wheel 25 and the drive wheel 24.

[0037] Reference Figure 4 Specifically: a bearing seat 27 is fixedly installed on the work frame 1, a rotating shaft 28 is rotatably installed on the bearing seat 27, a tension wheel 29 is fixedly installed at one end of the rotating shaft 28, and the tension wheel 29 is attached to the inner side of the transmission belt 26;

[0038] When the motor 23 starts, it drives the drive roller 19 to rotate through the transmission system consisting of the drive roller 24, the transmission belt 26 and the driven roller 25. The drive roller 19 and the driven roller 20 together drive the conveyor belt 21 to move forward continuously, thereby smoothly sending the printed materials to be laminated into the lamination station and sending out the laminated products.

[0039] Reference Figure 1 , Figure 6 Specifically: a through groove 30 is provided on the work frame 1, and a bolt 31 is rotatably installed on the bearing seat 27. One end of the bolt 31 passes through the through groove 30 and is threadedly connected to a nut 32. By adjusting the position of the bearing seat 27, and then passing the bolt 31 through the through groove 30 and fixing it with the nut 32, the position of the tensioning wheel 29 can be changed, thereby tensioning or loosening the transmission belt 26 to ensure transmission efficiency and stability.

[0040] Reference Figure 2 Specifically: the lifting device 5 is an electric telescopic rod.

[0041] Reference Figure 3 Specifically, the fixed cylinder 8 is provided with a through observation groove 33. Through the observation groove 33 on the fixed cylinder 8, the operator can intuitively monitor the degree of movement of the threaded rod 11 and the degree of adjustment of the preload.

[0042] Reference Figure 2 Specifically: a guide rod 34 is fixedly installed on the upper surface of the first lifting plate 6, and a limit block 35 is fixedly installed at the top of the guide rod 34.

[0043] Working principle: Manually rotating the handwheel 10 drives the threaded rod 11 to move axially. When processing thick or hard films, the operator rotates the handwheel 10 clockwise, causing the threaded rod 11 to move downward. The pressure cap 13 then compresses the spring 14 downward, increasing the preload force of the spring 14 on the telescopic column 9 and the second lifting plate 7. Conversely, when processing thin or soft films, rotating the handwheel 10 counterclockwise causes the threaded rod 11 to rise, reducing the preload force of the spring 14. This ensures that the laminating device obtains an initial downward pressure that matches the characteristics of the film before contacting the substrate.

[0044] Through the observation slot 33 opened on the fixed cylinder 8, the operator can intuitively monitor the degree of movement of the threaded rod 11 and the degree of adjustment of the preload.

[0045] After the pre-tensioned spring 14 has completed its elasticity, the lifting device 5 pushes the first lifting plate 6, the second lifting plate 7, and the film unwinding roller 15 to descend until the film on the film unwinding roller 15 contacts the surface of the printed material conveyed by the conveying device 2. When the film unwinding roller 15 contacts the substrate and continues to press down, the unevenness or slight change in thickness of the substrate surface will cause the laminating roller to be subjected to an upward impact force. At this time, the second lifting plate 7 tends to move upward, thereby pushing the telescopic column 9 to slide upward in the sleeve 12 and compressing the spring 14. This dynamic buffering effect eliminates rigid impact and protects the printed material from being crushed.

[0046] The electric heating roller 17, which is installed below the second lifting plate 7 along with the film unwinding roller 15, follows closely behind. The electric heating roller 17 heats and rolls the newly laminated film. The heat can activate certain types of film adhesive layers or make the film itself more elastic. Rolling can further eliminate the air remaining between the film and the printed matter, completely eliminate air bubbles, make the lamination bond stronger, and make the surface smoother and cleaner, greatly improving the final quality and visual effect of the laminated product.

[0047] The conveying device 2 provides stable material transfer power for the entire process. The motor 23 starts and drives the drive roller 19 to rotate through the transmission system consisting of the drive roller 24, the transmission belt 26 and the driven roller 25. The drive roller 19 and the driven roller 20 together drive the conveyor belt 21 to move forward continuously, thereby smoothly sending the printed materials to be laminated into the lamination station and sending out the laminated products.

[0048] By adjusting the position of the bearing housing 27, and then using bolts 31 to pass through the through groove 30 and fix them with nuts 32, the position of the tensioning wheel 29 can be changed, thereby tensioning or loosening the transmission belt 26 to ensure transmission efficiency and stability.

[0049] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0050] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

Claims

1. A film laminating device for a printing machine, characterized by comprising: The utility model provides a kind of film conveying device, including workbench (1), the workbench (1) is fixedly installed with conveying device (2), the workbench (1) left and right sides are fixedly installed with vertical plate (3), the vertical plate (3) top is fixedly installed with crossbeam (4), the crossbeam (4) is fixedly installed with lifting device (5), the lifting device (5) output end is fixedly installed with first lifting plate (6), the first lifting plate (6) below is provided with second lifting plate (7), and adjustable buffer assembly is arranged between the second lifting plate (7) and first lifting plate (6); The adjustable buffer assembly includes a fixedly installed fixed cylinder (8) on the lower surface of the first lifting plate (6) and a telescopic column (9) fixedly installed on the upper surface of the second lifting plate (7), the fixed cylinder (8) bottom is rotatably installed with a hand wheel (10), the hand wheel (10) middle position is threadedly connected with a threaded rod (11), the telescopic column (9) is slidably installed with a sleeve (12), the threaded rod (11) bottom end penetrates the sleeve (12) and is fixedly installed with a gland (13), the gland (13) and the telescopic column (9) are provided with a spring (14) therebetween. The second lifting plate (7) is connected with a film unwinding roller (15) below.

2. The laminating device for a printing press according to claim 1, wherein The second lifting plate (7) is fixedly installed with four mounting plates (16) on the lower surface, the film unwinding roller (15) is rotatably installed between two of the mounting plates (16), and an electric heating roller (17) is rotatably installed between the other two mounting plates (16).

3. The laminating device for a printing machine according to claim 1, wherein The conveying device (2) includes a rack (18), the rack (18) left and right ends are rotatably installed with a driving roller (19) and a driven roller (20), the driven roller (20) and the driving roller (19) are transmissionally connected with a conveying belt (21), the workbench (1) is fixedly installed with a support frame (22), the support frame (22) is fixedly installed with a motor (23), the motor (23) output end is fixedly installed with a driving wheel (24), one end of the driving roller (19) is fixedly installed with a driven wheel (25), and the driven wheel (25) and the driving wheel (24) are transmissionally connected with a transmission belt (26).

4. The laminating device for a printing machine according to claim 3, wherein The workbench (1) is fixedly installed with a bearing seat (27), the bearing seat (27) is rotatably installed with a rotating shaft (28), one end of the rotating shaft (28) is fixedly installed with a tension pulley (29), and the tension pulley (29) is attached to the inner side of the transmission belt (26).

5. The laminating device for a printing machine according to claim 4, wherein A through slot (30) is formed in the workbench (1), a bolt (31) is rotatably installed on the bearing seat (27), one end of the bolt (31) penetrates the through slot (30) and is threadedly connected with a nut (32).

6. The laminating device for a printing machine according to claim 1, wherein The lifting device (5) is an electric telescopic rod.

7. The laminating device for a printing machine according to claim 1, wherein An observation slot (33) is formed in the fixed cylinder (8) and extends front to back.

8. The laminating device for a printing machine according to claim 1, wherein A guide rod (34) is fixedly installed on the upper surface of the first lifting plate (6), and a limiting block (35) is fixedly installed on the top end of the guide rod (34). A guide rod (34) is fixedly installed on the upper surface of the first lifting plate (6), and a limiting block (35) is fixedly installed on the top end of the guide rod (34).

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