Paperboard film covering device and method for paperboard processing

Abstract

The invention discloses a paperboard film laminating device and method for paperboard processing, relates to the technical field of paperboard film laminating, and aims to solve the problems that in an existing laminating device, rolling pressing in the vertical direction is generally adopted when a film is attached to a paperboard, but the pressing in the vertical direction cannot flatten film wrinkles when the film wrinkles, so that the film laminating efficiency is greatly improved. Therefore, a large number of wrinkles appear after the film is attached to the paperboard. According to the paperboard film laminating device for paperboard processing, when a paperboard and a film pass through a pressing roller, a backing ring is compressed upwards in an inclined mode through an inclined groove of an inclined groove plate, the backing ring generates elastic force, the pressing roller presses the film towards the surface of the paperboard downwards in an inclined mode, meanwhile, the pressing roller is matched with pre-pressing of the film and the paperboard, and after the film is wrinkled, the film is laminated on the surface of the paperboard. By means of obliquely downward pressing of the pressing roller, transverse acting force is generated on the thin film, wrinkles are smoothed, and the phenomenon that the thin film is wrinkled due to pure vertical pressing when the thin film is covered with a film is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of cardboard laminating, and in particular to a cardboard laminating device and method for cardboard processing. Background Art

[0002] At present, cardboard is easily damaged by external factors during transportation, storage and use. After the laminating device covers the surface of the cardboard with a layer of film, it can effectively prevent the cardboard from being scratched. For example, laminating the paper box for packaging electronic products can avoid scratches caused by collision with other objects during transportation and protect the integrity of the paper box's appearance. The cardboard laminating device is a device used to cover the surface of the cardboard with a layer of plastic film. This film can protect the cardboard, increase the gloss of the cardboard, and prevent moisture and water. It is widely used in the packaging industry, such as making high-quality product packaging boxes, album covers, etc. In existing laminating devices, vertical rolling pressure is usually used when laminating the film to the cardboard. However, the vertical pressure cannot smooth out the wrinkles on the film when they appear, resulting in a large number of wrinkles after the film and cardboard are laminated. Summary of the Invention

[0003] To achieve the above objectives, the present invention is implemented through the following technical solutions: A cardboard laminating device for cardboard processing, comprising: A frame, with a guide mechanism installed on the top of the frame, the guide mechanism is used to provide support for the bottom of the paperboard; A roller pressing mechanism, which is used to provide pressure when the film contacts the paperboard. The roller pressing mechanism is fixedly installed at the center of the top of the guide mechanism, and a motor is fixedly installed on the outside of the roller pressing mechanism; An unwinding mechanism, which is used to adjust the position of the film roll and is installed on one side of the top of the guide mechanism; The roller pressing mechanism includes a support block, which is symmetrically mounted on the top of the guide mechanism along the center position of the axis of the guide mechanism, and a transmission shaft is rotatably mounted between the support blocks, the outer side of the support block is fixedly connected to the motor, and the output end of the motor is fixedly connected to one end of the transmission shaft, and the bottom of the support block away from the unwinding mechanism is fixedly mounted with an inclined slot plate, through the inclined slot of the inclined slot plate, when the cardboard and the film pass through the pressing roller, the gasket is compressed obliquely upward, so that the gasket generates elastic force, so that the pressing roller presses the film obliquely downward to the surface of the cardboard, and at the same time cooperates with the laminating roller to pre-press the film and the cardboard. After wrinkles appear on the film, the pressing roller applies oblique downward pressure to generate a lateral force on the film, smoothing the wrinkles, thereby avoiding the film being simply pressurized in the vertical direction when laminating. This causes wrinkles in the film. An oblique groove is provided on the outer side of the oblique groove plate, and the end of the oblique groove away from the support block is obliquely tilted upward. A pressing roller is slidably installed at the oblique groove of the oblique groove plate, and a gasket is clamped at the oblique groove of the oblique groove plate. The gasket is made of elastic material, and a shaft sleeve is fixedly installed on the outer side of the transmission shaft, and a pressing roller is fixedly installed on the outer side of the shaft sleeve. A groove is evenly provided at the center position of the outer side of the pressing roller, and a limiting rod is fixedly installed on the side of the support block close to the unwinding mechanism. The limiting rod separates the cardboard from the film before the film and the cardboard are laminated, so that the film and the cardboard do not contact each other, and avoids the film and the cardboard from contacting each other before laminating, and the adhesive surface of the film contacts the cardboard, causing sticking, so that the laminating position of the film and the cardboard is misaligned, and there is a gap between the limiting rod and the laminating roller.

[0004] Preferably, the unwinding mechanism includes a side plate, which is symmetrically installed on one side of the top of the guide mechanism along the center position of the axis of the guide mechanism, and a slide groove is opened on the top of the outer side of the side plate, and the non-opposite surfaces of the side plate are fixedly installed with a connecting plate, and both sides of the top of the connecting plate are fixedly installed with a slide rod, and a slider is slidably installed on the outer side of the slide rod, and a spring is fixedly installed between the slider and the connecting plate. Through the elastic deformation of the spring, during the unwinding process of the film roll, when the unwinding angle of the film roll is too large, resulting in a large pulling force, the height of the film roll is reduced by the deformation of the spring, and the unwinding angle is reduced, so that the film roll can be unwound smoothly, avoiding a large pulling force when the film roll is unwound, resulting in film deformation and wrinkles after covering. The spring is located on the outer side of the slide rod.

[0005] Preferably, a support block is rotatably provided on the inner wall of the slider, and the outer side of the support block is slidably adapted to the sliding groove of the side plate, and the outer side of the support block is fixedly connected with a buckle by a bolt, and the support blocks are fixedly connected with a fixed roller by the buckle, and the opposite surfaces of the side plates are fixedly installed with a fixing plate, and the end of the fixing plate away from the side plate is tilted upward, and an empty groove is opened on the outer side of the fixing plate, and a film pressing rod is slidably installed in the empty groove of the fixing plate, and the top of the film is restricted by the gravity of the film pressing rod itself during unwinding to ensure smooth transportation of the film. At the same time, when the unwinding stops, the loose film is tightened to avoid the film being loose and the contact and sticking between the adhesive surfaces, which causes damage to the film.

[0006] The top of described sliding panel also is provided with an interlocking structure, and the interlocking structure of described sliding panel withstands on the backing of base plate, and the interlocking structure of described base plate is that guiding the lifting of pin respectively hangs on the interlocking structure of base plate, guide rail, and gear.

[0007] A method for using a cardboard laminating device for cardboard processing comprises the following steps: S1. Fix the film roll to be pressed on the cardboard surface through the unwinding mechanism, and control the film guide angle during the pressing process; S2, cardboard guiding, workers guide the cardboard from the top of the guiding mechanism close to the unwinding mechanism, and the guiding mechanism supports the bottom of the cardboard; S3, lamination pre-pressing, when the film and paperboard just enter the roller pressing mechanism, the film and paperboard are pre-pressed by the roller pressing mechanism to make the film and paperboard surface interleaved and pressed; S4. Composite export. During the pre-pressing process, the roller pressing mechanism drives the film and paperboard to be exported to the other side. At the same time, during the exporting process, the pre-pressed paperboard and film are completely composited and exported through the cooperation of the roller pressing mechanism and the guiding mechanism.

[0008] The present invention provides a cardboard laminating device for cardboard processing, which has the following beneficial effects: 1. The cardboard laminating device used for cardboard processing compresses the gasket upward obliquely through the inclined groove of the inclined groove plate when the cardboard and the film pass through the pressing roller, so that the gasket generates elastic force, and the pressing roller presses the film to the cardboard surface obliquely downward. At the same time, it cooperates with the laminating roller to pre-press the film and cardboard. After wrinkles appear on the film, the pressing roller applies oblique downward pressure to generate a lateral force on the film, smoothing the wrinkles, thereby avoiding wrinkles on the film caused by simple vertical pressure during lamination.

[0009] 2. The cardboard laminating device for cardboard processing separates the cardboard and the film through a limiting rod before the film and the cardboard are laminated, so that the film and the cardboard do not contact each other, thereby avoiding contact between the film and the cardboard before laminating, and avoiding the contact between the adhesive surface of the film and the cardboard, causing sticking and misalignment of the laminating position of the film and the cardboard.

[0010] 3. The cardboard laminating device for cardboard processing uses the elastic deformation of the spring. During the unwinding process of the film roll, when the unwinding angle of the film roll is too large, resulting in a large pulling force, the spring is deformed to lower the height of the film roll and the unwinding angle, so that the film roll can be unwound smoothly, avoiding a large pulling force when the film roll is unwound, resulting in film deformation and wrinkles after laminating.

[0011] 4. The cardboard laminating device used for cardboard processing uses the gravity of the film pressing rod itself to limit the top of the film when unwinding, ensuring smooth transportation of the film. At the same time, when the unwinding stops, the loose film is tightened to prevent the film from becoming loose and the adhesive surfaces from contacting and sticking, which may cause damage to the film.

[0012] 5. The cardboard laminating device used for cardboard processing cooperates with the laminating roller during pre-pressing through the arc-shaped protrusion at the center of the top of the arc top plate to lift the cardboard at the center between the arc top plate and the laminating roller, causing the cardboard to deform into an arc shape, thereby improving the pre-pressing effect of the cardboard and the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the external structure of a cardboard laminating device for cardboard processing according to the present invention; Figure 2 This is a side view of the structure of a cardboard laminating device for cardboard processing according to the present invention; Figure 3 This is a structural diagram of the unwinding mechanism of the present invention; Figure 4 It is a partial structural diagram of the unwinding mechanism of the present invention; Figure 5 This is a schematic diagram of the position structure of the rolling mechanism and the guiding mechanism of the present invention; Figure 6 This is a schematic structural diagram of the roller pressing mechanism of the present invention; Figure 7It is a partial structural diagram of the rolling mechanism of the present invention; Figure 8 Schematic diagram of the structure of the guide mechanism of the present invention; Figure 9 This is a structural anatomical diagram of the guide mechanism of the present invention; Figure 10 Schematic diagram of the method of use of the present invention.

[0014] In the figure: 1. frame; 2. rolling mechanism; 3. unwinding mechanism; 4. guiding mechanism; 5. motor; 21. support block; 22. transmission shaft; 23. bushing; 24. limiting rod; 25. laminating roller; 26. pressing roller; 27. gasket; 28. chute plate; 301. side plate; 302. fixed plate; 303. film pressing rod; 304. spring; 305. connecting plate; 306. sliding rod; 307. slider; 308. fixed roller; 309. supporting block; 310. buckle; 41. bottom plate; 42. splint; 43. guide roller; 44. supporting plate; 45. arc top plate; 46. gasket. DETAILED DESCRIPTION

[0015] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described to better illustrate the principles of the invention and its practical application, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for specific applications.

[0016] The first embodiment, as Figures 1 to 2 and Figures 5 to 7 As shown, the present invention provides a technical solution: a cardboard laminating device for cardboard processing, comprising: A frame 1 is provided with a guide mechanism 4 on the top of the frame 1, and the guide mechanism 4 is used to provide support at the bottom of the cardboard; The roller pressing mechanism 2 is used to provide pressure when the film contacts the paperboard. The roller pressing mechanism 2 is fixedly installed at the center of the top of the guide mechanism 4, and a motor 5 is fixedly installed on the outside of the roller pressing mechanism 2; The unwinding mechanism 3 is used to adjust the position of the film roll and is installed on one side of the top of the guide mechanism 4; Among them, the rolling mechanism 2 includes a support block 21, which is symmetrically installed on the top of the guide mechanism 4 along the center position of the axis of the guide mechanism 4, and a transmission shaft 22 is rotatably installed between the support blocks 21. The outer side of the support block 21 is fixedly connected to the motor 5, and the output end of the motor 5 is fixedly connected to one end of the transmission shaft 22. The bottom of the support block 21 away from the unwinding mechanism 3 is fixedly installed with an inclined slot plate 28. The outer side of the inclined slot plate 28 is provided with an inclined slot. When the film pre-pressing is completed, the film and the cardboard pass through the laminating roller 25 and enter The laminating roller 26 is inserted between the laminating roller and the guide mechanism 4, and contacts the film surface through the laminating roller 26. When the cardboard and the film pass through, the laminating roller 26 is pushed obliquely upward, causing the pad ring 27 to elastically deform, generating an oblique downward elastic force, pushing the laminating roller 26 to apply oblique downward pressure on the film surface, and the pre-pressed film and the cardboard are pressed and laminated again. At the same time, when wrinkles appear between the film and the cardboard, the wrinkles are smoothed by the friction between the wrinkles and the oblique downward pressure of the laminating roller 26, and the end of the inclined groove away from the support block 21 is obliquely tilted. The inclined groove of the inclined groove plate 28 is tilted upward, and a pressing roller 26 is slidably installed at the inclined groove of the inclined groove plate 28, and a gasket 27 is clamped at the inclined groove of the inclined groove plate 28. The gasket 27 is made of elastic material. A shaft sleeve 23 is fixedly installed on the outside of the transmission shaft 22, and a pressing roller 25 is fixedly installed on the outside of the shaft sleeve 23. The center position of the outer side of the pressing roller 25 is evenly provided with grooves. The transmission shaft 22 is driven to rotate by the motor 5, so that the rotating transmission shaft 22 drives the pressing roller 25 to rotate through the shaft sleeve 23, and pre-presses the cardboard and film passing through. The grooves are evenly opened on the surface. When the film and the cardboard pass through, the two sides between the cardboard and the film are completely pressed together, and the center position is segmented pressed to complete the pre-pressing of the film and the cardboard. A limiting rod 24 is fixedly installed on the side of the support block 21 close to the unwinding mechanism 3. During the film introduction process, the introduction position of the film is limited by the limiting rod 24, so that the film passes through the gap between the limiting rod 24 and the laminating roller 25, and the film and the cardboard are separated before laminating. There is a gap between the limiting rod 24 and the laminating roller 25.

[0017] The second embodiment, based on the first embodiment, see Figures 3 and 4As shown, the unwinding mechanism 3 includes a side plate 301, which is symmetrically installed on one side of the top of the guide mechanism 4 along the center position of the axis of the guide mechanism 4, and a slide groove is opened on the top of the outer side of the side plate 301. The non-opposite surfaces of the side plate 301 are fixedly installed with a connecting plate 305. The fixed roller 308 is inserted into the film roll, and then the fixed roller 308 is placed in the support block 309 and fixedly connected to the support block 309 through the buckle 310. The fixed roller 308 and the film roll are installed in the unwinding mechanism. In mechanism 3, during the process of unwinding the film, the film passes through the bottom of the film pressing rod 303, so that the film contacts the bottom of the film pressing rod 303, and the guiding angle of the film is controlled by the gravity of the film pressing rod 303 itself. Slide rods 306 are fixedly installed on both sides of the top of the connecting plate 305, and a slider 307 is slidably installed on the outer side of the slider 306. A spring 304 is fixedly installed between the slider 307 and the connecting plate 305, and the spring 304 is located on the outer side of the slide rod 306.

[0018] The inner wall of the slider 307 is rotatable with a support block 309, and the outer side of the support block 309 is slidably adapted to the slide groove of the side plate 301, and the outer side of the support block 309 is fixedly connected with a buckle 310 by bolts, and the support blocks 309 are fixedly connected with a fixed roller 308 by the buckle 310. The opposite surfaces of the side plates 301 are fixedly installed with fixed plates 302, and the end of the fixed plate 302 away from the side plate 301 is tilted upward. During the laminating process, the film roll rotates at a high speed. When the laminating stops, the film roll will continue to rotate at a certain angle due to its inertia. At this time, the film pressing rod 30 The sliding of the inner wall of the fixed plate 302 causes the film pressing rod 303 to slide obliquely downward by its own weight, thereby restricting the film and tightening it to a certain extent. At the same time, during the unwinding process, the film is pulled, and the pressure is transmitted to the slider 307 through the fixed roller 308 and the support block 309, causing the slider 307 to compress the spring 304 and deform, causing the support block 309 to slide in the sliding groove of the side plate 301, thereby lowering the height of the film roll and reducing the unwinding angle. The outer side of the fixed plate 302 is provided with a slot, and the film pressing rod 303 is slidably installed in the slot of the fixed plate 302.

[0019] The third embodiment, based on the first and second embodiments, see Figures 8 to 10As shown, the guiding mechanism 4 includes a bottom plate 41, which is fixedly mounted on the top of the frame 1, and clamping plates 42 are fixedly mounted on both sides of the top of the bottom plate 41. The guide rollers 43 evenly mounted on both sides ensure support for the cardboard when the cardboard is introduced and exported, and the friction with the bottom of the cardboard is reduced by rotating the guide rollers 43. Guide rollers 43 are mounted on both sides of the opposite surface of the clamping plate 42, and the two ends of the guide roller 43 are rotatably connected to the inner wall of the clamping plate 42. A supporting plate 44 is fixedly mounted between the clamping plates 42, and the top of the supporting plate 44 is flush with the top of the guide roller 43, and the supporting plate 44 is symmetrically mounted along the center position of the axis of the bottom plate 41, and the top of the supporting plate 44 is in contact with the bottom of the pressing roller 26. An arc top plate 45 is slidably mounted between the supporting plates 44, and when the rolling mechanism 2 presses the film and the cardboard, the arc top plate 45 cooperates with the laminating roller 25 to support the cardboard directly under the laminating roller 25 when the cardboard passes by. At the same time, the arc surface raised at the center of the top of the arc top plate 45 cooperates with the pad 46. When the cardboard passes by, the pad 46 is compressed and deformed, so that the pad 46 generates elastic force, so that the arc top plate 45 pushes the cardboard upward. At the same time, after the cardboard and the film are pre-pressed, the support plate 44 cooperates with the laminating roller 26. During the parallel conveying of the cardboard, the bottom of the cardboard is supported so that the cardboard is composited with the film under the interaction force of the laminating roller 26. The top of the arc top plate 45 is an arc surface raised upward at the center, and the arc top plate 45 is located directly under the laminating roller 25. Pads 46 are fixedly installed on both sides of the arc top plate 45. The pad 46 is made of rubber material, and the top of the pad 46 is fixedly connected to the bottom of the support plate 44.

[0020] A method for using a cardboard laminating device for cardboard processing comprises the following steps: S1, film roll fixing, the film roll to be pressed on the cardboard surface is fixed by the unwinding mechanism 3, and the film guide angle is controlled during the pressing process; S2, cardboard guiding, the worker introduces the cardboard from the top of the guiding mechanism 4 close to the side of the unwinding mechanism 3, and the guiding mechanism 4 supports the bottom of the cardboard; S3, lamination pre-pressing, when the film and paperboard just enter the roller pressing mechanism 2, the film and paperboard are pre-pressed by the roller pressing mechanism 2, so that the film and paperboard surface are spaced and pressed together; S4, composite export. During the pre-pressing process, the roller pressing mechanism 2 drives the film and paperboard to be exported on one side. At the same time, during the exporting process, the pre-pressed paperboard and film are completely composited and exported through the cooperation of the roller pressing mechanism 2 and the guiding mechanism 4.

[0021] During use, the film roll is fixed by the unwinding mechanism 3, and the film roll is controlled by the unwinding mechanism 3. Then, the cardboard is introduced into the rolling mechanism 2 from the side close to the unwinding mechanism 3 by the guiding mechanism 4. At the same time, the film and the cardboard enter the rolling mechanism 2 at the same time, and the rolling mechanism 2 cooperates with the guiding mechanism 4 to apply pressure to the film and the cardboard, pressing the film and the cardboard surface to complete the cardboard lamination.

[0022] In the unwinding mechanism 3, the fixed roller 308 is inserted into the film roll, and then the fixed roller 308 is placed in the support block 309 and fixedly connected to the support block 309 through the buckle 310. The fixed roller 308 and the film roll are installed into the unwinding mechanism 3. In the process of unwinding the film, the film passes through the bottom of the film pressing rod 303, so that the film contacts the bottom of the film pressing rod 303, and the film guide angle is controlled by the gravity of the film pressing rod 303 itself. At the same time, during the laminating process, the film roll rotates at a high speed. When the laminating stops, the film roll rotates at a high speed. The film roll has inertia and will continue to rotate at a certain angle. At this time, the film pressing rod 303 slides on the inner wall of the fixed plate 302, causing the film pressing rod 303 to slide obliquely downward due to its own gravity, restricting the film and tightening the film to a certain extent. At the same time, during the unwinding process, the film is pulled, and the pressure is transmitted to the slider 307 through the fixed roller 308 and the support block 309, causing the slider 307 to compress the spring 304 to deform, causing the support block 309 to slide in the slide groove of the side plate 301, thereby lowering the height of the film roll and reducing the unwinding angle.

[0023] When the film and the cardboard are rolled and laminated by the rolling mechanism 2, the transmission shaft 22 is driven to rotate by the motor 5, so that the rotating transmission shaft 22 drives the laminating roller 25 to rotate through the shaft sleeve 23, and pre-presses the passing cardboard and film. Through the grooves evenly opened on the surface of the laminating roller 25, when the film and the cardboard pass, the two sides of the cardboard and the film are completely pressed together, and the center position is segmentedly pressed together, so that the film and the cardboard are pre-pressed. At the same time, during the film introduction process, the introduction position of the film is limited by the limiting rod 24, so that the film passes through the gap between the limiting rod 24 and the laminating roller 25. Pass through, separate the film and cardboard before laminating, when the film pre-pressing is completed, the film and cardboard pass through the laminating roller 25, enter between the laminating roller 26 and the guide mechanism 4, contact the film surface through the laminating roller 26, when the cardboard and film pass through, the laminating roller 26 is pushed obliquely upward, so that the pad ring 27 is elastically deformed, generating an oblique downward elastic force, pushing the laminating roller 26 to apply oblique downward pressure on the film surface, and press the pre-pressed film and cardboard again to compound, and at the same time, the oblique downward pressure, when wrinkles appear between the film and cardboard, the wrinkles are smoothed by the friction of the oblique downward pressure between the wrinkles and the laminating roller 26.

[0024] When the cardboard is supported by the guiding mechanism 4, the guide rollers 43 evenly installed on both sides ensure support for the cardboard when it is introduced and exported. The friction with the bottom of the cardboard is reduced by rotating the installed guide rollers 43. When the rolling mechanism 2 presses the film and the cardboard, the arc top plate 45 cooperates with the pressing roller 25 to support the cardboard directly under the pressing roller 25 when the cardboard passes. At the same time, the raised arc surface at the top center of the arc top plate 45 cooperates with the pad 46 to compress and deform the pad 46 when the cardboard passes, so that the pad 46 generates elastic force, causing the arc top plate 45 to lift the cardboard upward. At the same time, after the cardboard and the film are pre-pressed, the support plate 44 cooperates with the pressing roller 26 to support the bottom of the cardboard during the parallel conveying of the cardboard, so that the cardboard is composited with the film under the interaction force of the pressing roller 26.

[0025] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A cardboard laminating device for cardboard processing, characterized in that: include: A frame (1), wherein a guide mechanism (4) is installed on the top of the frame (1), and the guide mechanism (4) is used to provide support at the bottom of the paperboard; A roller pressing mechanism (2), the roller pressing mechanism (2) being used to provide pressure when the film contacts the paperboard, the roller pressing mechanism (2) being fixedly mounted at the center position of the top of the guide mechanism (4), and a motor (5) being fixedly mounted on the outside of the roller pressing mechanism (2); An unwinding mechanism (3), the unwinding mechanism (3) being used to adjust the position of the film roll, the unwinding mechanism (3) being mounted on one side of the top of the guiding mechanism (4); The rolling mechanism (2) comprises a support block (21), the support block (21) being symmetrically mounted on the top of the guide mechanism (4) along the central position of the axis of the guide mechanism (4), and a transmission shaft (22) being rotatably mounted between the support blocks (21), the outer side of the support block (21) being fixedly connected to the motor (5), the output end of the motor (5) being fixedly connected to one end of the transmission shaft (22), a chute plate (28) being fixedly mounted on the bottom of the support block (21) on the side away from the unwinding mechanism (3), the outer side of the chute plate (28) being provided with a chute, and one end of the chute away from the support block (21) being tilted upward, a pressing roller (26) being slidably mounted at the chute of the chute plate (28), and a gasket (27) being clamped at the chute of the chute plate (28), and the gasket (27) being made of elastic material.

2. A cardboard laminating device for cardboard processing according to claim 1, characterized in that: A shaft sleeve (23) is fixedly mounted on the outer side of the transmission shaft (22), a pressure roller (25) is fixedly mounted on the outer side of the shaft sleeve (23), grooves are evenly arranged at the center position of the outer side of the pressure roller (25), and a limiting rod (24) is fixedly mounted on the side of the support block (21) close to the unwinding mechanism (3), and a gap exists between the limiting rod (24) and the pressure roller (25).

3. A cardboard laminating device for cardboard processing according to claim 2, characterized in that: The unwinding mechanism (3) comprises a side plate (301), the side plate (301) being symmetrically mounted on one side of the top of the guiding mechanism (4) along the central position of the axis of the guiding mechanism (4), and a slide groove is provided on the top of the outer side of the side plate (301), and a connecting plate (305) is fixedly mounted on the non-opposite surface of the side plate (301).

4. A cardboard laminating device for cardboard processing according to claim 3, characterized in that: Slide bars (306) are fixedly mounted on both sides of the top of the connecting plate (305); a slider (307) is slidably mounted on the outer side of the slide bar (306); a spring (304) is fixedly mounted between the slider (307) and the connecting plate (305); and the spring (304) is located on the outer side of the slide bar (306).

5. A cardboard laminating device for cardboard processing according to claim 4, characterized in that: A support block (309) is rotatably provided on the inner wall of the sliding block (307); the outer side of the support block (309) is slidably adapted to the sliding groove of the side plate (301); a buckle ring (310) is fixedly connected to the outer side of the support block (309) via bolts; and a fixed roller (308) is fixedly connected between the support blocks (309) via the buckle ring (310).

6. A cardboard laminating device for cardboard processing according to claim 5, characterized in that: The opposite surfaces of the side plates (301) are fixedly mounted with fixing plates (302), one end of the fixing plates (302) away from the side plates (301) is tilted upward, and the outer sides of the fixing plates (302) are provided with empty grooves, and film pressing rods (303) are slidably mounted in the empty grooves of the fixing plates (302).

7. A cardboard laminating device for cardboard processing according to claim 6, characterized in that: The guiding mechanism (4) comprises a bottom plate (41), the bottom plate (41) being fixedly mounted on the top of the frame (1), clamping plates (42) being fixedly mounted on both sides of the top of the bottom plate (41), guiding rollers (43) being mounted on both sides of the opposite sides of the clamping plates (42), and both ends of the guiding rollers (43) being rotatably connected to the inner wall of the clamping plates (42).

8. A cardboard laminating device for cardboard processing according to claim 7, characterized in that: A support plate (44) is fixedly mounted between the clamping plates (42), the top of the support plate (44) is flush with the top of the guide roller (43), and the support plate (44) is symmetrically mounted along the center position of the axis of the bottom plate (41), and the top of the support plate (44) is in contact with the bottom of the pressing roller (26).

9. A cardboard laminating device for cardboard processing according to claim 8, characterized in that: An arc top plate (45) is slidably mounted between the support plates (44); the top of the arc top plate (45) is an arc surface that bulges upward at the center, and the arc top plate (45) is located directly below the pressing roller (25); pads (46) are fixedly mounted on both sides of the arc top plate (45); the pads (46) are made of rubber material, and the top of the pads (46) is fixedly connected to the bottom of the support plates (44).

10. A method for using a cardboard laminating device for cardboard processing according to any one of claims 1 to 9, characterized in that: It consists of the following steps: S1, fixing the film roll, fixing the film roll to be pressed on the surface of the paperboard through the unwinding mechanism (3), and controlling the film guide angle during the pressing process; S2, cardboard guiding, the worker guides the cardboard from the top of the guiding mechanism (4) to the side close to the unwinding mechanism (3), and supports the bottom of the cardboard through the guiding mechanism (4); S3, pre-pressing the film, when the film and the paperboard just enter the roller pressing mechanism (2), the film and the paperboard are pre-pressed by the roller pressing mechanism (2) so that the film and the paperboard surface are pressed together; S4, composite exporting: during the pre-pressing process, the roller pressing mechanism (2) drives the film and the paperboard to be exported to the other side. At the same time, during the exporting process, the pre-pressed paperboard and the film are completely composited and exported through the cooperation of the roller pressing mechanism (2) and the guiding mechanism (4).

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