Laminating mechanism and laminator

Abstract

This application discloses a pressing mechanism and a laminating machine. The pressing mechanism, used for pressing composite paper, includes a heating roller structure, a first pressing roller structure, a second pressing roller structure, and a peeling structure. The first pressing roller structure and the heating roller structure cooperate to form a primary pressing channel for the composite paper to pass through. The heating roller structure and the first pressing roller structure cooperate to perform a primary pressing of the composite paper located within the primary pressing channel. The second pressing roller structure and the heating roller structure cooperate to form a secondary pressing channel for the composite paper after the primary pressing is completed. The heating roller structure and the second pressing roller structure cooperate to perform a secondary pressing of the composite paper located within the secondary pressing channel. The peeling structure is located at the exit of the secondary pressing channel to allow the composite paper to peel off from the heating roller structure after exiting the secondary pressing channel. The technical solution of this application can improve the pressing effect on composite paper.

Description

Technical Field

[0001] This application relates to the field of printing machinery technology, and in particular to a pressing mechanism and a laminating machine. Background Technology

[0002] In the printing process, there is a lamination process, which is used to press the film and paper together to form a paper-plastic composite paper. Because the surface of the composite paper has a thin and transparent film, the surface of the composite paper is smoother and shinier, and the film can also play a protective role such as preventing dirt and wear.

[0003] In related technologies, laminating machines typically use a single hot pressing method to press composite paper. However, in this method, the contact area between the composite paper and the heating roller is relatively short, resulting in poor pressing effect of the laminating machine on the composite paper. Consequently, bubbles and white spots are easily generated between the paper and the film, leading to poor gloss or matte finish of the composite paper. Furthermore, there is a risk of separation between the paper and the film, affecting the processing quality of printed materials. Utility Model Content

[0004] This application provides a pressing mechanism and a laminating machine that can improve the pressing effect on composite paper.

[0005] In a first aspect, embodiments of this application provide a pressing mechanism for pressing composite paper, the composite paper including paper and a film covering the surface of the paper, the pressing mechanism including a heating roller structure, a first pressing roller structure, a second pressing roller structure and a peeling structure; The first pressing roller structure and the heating roller structure cooperate to form a primary pressing channel for the composite paper to pass through. The heating roller structure and the first pressing roller structure are used to perform a primary pressing of the composite paper located in the primary pressing channel. The second pressing roller structure and the heating roller structure cooperate to form a secondary pressing channel for the composite paper to pass through after the primary pressing. The heating roller structure and the second pressing roller structure are used to perform a secondary pressing of the composite paper located in the secondary pressing channel. The peeling structure is provided at the exit of the secondary pressing channel to enable the composite paper to peel off from the heating roller structure after exiting the secondary pressing channel through the exit.

[0006] In some embodiments, the pressing mechanism has a first pressing state, a second pressing state, and a third pressing state in sequence; When the pressing mechanism is in the first pressing state, a portion of the composite paper is located in the primary pressing channel so as to be pressed by the heating roller structure and the first pressing roller structure. When the pressing mechanism is in the second pressing state, part of the composite paper is located in the primary pressing channel to be pressed by the heating roller structure and the first pressing roller structure, and part of it is located in the secondary pressing channel to be pressed by the heating roller structure and the second pressing roller structure. When the pressing mechanism is in the third pressing state, a portion of the composite paper is located in the secondary pressing channel so as to be pressed by the heating roller structure and the second pressing roller structure.

[0007] In some embodiments, in the second pressed state, the composite paper has a contact surface that contacts the heating roller structure; Wherein, along the length direction of the composite paper, the length of the contact surface is greater than 200 centimeters.

[0008] In some embodiments, the second pressing roller structure includes a fixed plate, a roller body, and a driving component; The roller body is mounted on the fixed plate and cooperates with the heating roller structure to form the secondary pressing channel. The roller body and the heating roller structure are used to cooperate to perform secondary pressing on the composite paper located in the secondary pressing channel. The driving component is drivenly connected to the fixed plate. The driving component can move the roller body closer to or away from the heating roller structure via the fixed plate, thereby correspondingly reducing or expanding the size of the secondary pressing channel, and thus correspondingly increasing or decreasing the pressure of the roller body and the heating roller structure on the composite paper for secondary pressing.

[0009] In some embodiments, the driving component is a cylinder, one side of the fixed plate is connected to the cylinder for transmission, and the other side is rotatably disposed; And / or, the roller body includes a roller body and a colloid layer wrapped around the roller body, wherein the colloid layer and the heating roller structure cooperate to form the secondary pressing channel, wherein the Shore A hardness of the colloid layer is greater than or equal to 75 degrees and less than or equal to 93 degrees.

[0010] In some embodiments, the first pressing roller structure may be close to or far from the heating roller structure to make the size of the primary pressing channel adjustable, thereby making the pressure of the heating roller structure and the first pressing roller structure on the composite paper adjustable for primary pressing.

[0011] In some embodiments, the stripping structure includes a gas supply structure and a nozzle, the gas supply structure being in communication with the nozzle for supplying gas to the nozzle, the nozzle being located at the outlet and facing the outlet; The air nozzle is used to spray gas onto the composite paper so that the composite paper can be peeled off from the heating roller structure after leaving the secondary pressing channel through the outlet.

[0012] In some embodiments, the nozzle has an air outlet that is oriented toward the outlet; The air outlet is flat so that the gas is in a laminar flow state after being ejected through the air outlet.

[0013] In some embodiments, the air nozzles include a plurality of nozzles, and the plurality of air nozzles are spaced apart along the width direction of the composite paper; And / or, the pressure of the gas ejected from the nozzle onto the composite paper is greater than or equal to 0.3 MPa and less than or equal to 0.7 MPa.

[0014] Secondly, embodiments of this application provide a laminating machine, which includes a feeder mechanism, an adhesive coating mechanism, a drying tunnel mechanism, a pressing mechanism as described above, and a slitting mechanism arranged in sequence. The feeder mechanism is used to feed the paper to the adhesive coating mechanism, the adhesive coating mechanism is used to coat the surface of the paper with adhesive, the drying tunnel mechanism is used to heat the adhesive, the pressing mechanism is used to press the composite paper, and the slitting mechanism is used to cut the pressed composite paper. Alternatively, the laminating machine may include a feeder mechanism, an adhesive coating mechanism, a drying tunnel mechanism, a pressing mechanism as described above, and a winding mechanism arranged in sequence. The feeder mechanism is used to feed the paper to the adhesive coating mechanism, the adhesive coating mechanism is used to apply adhesive to the surface of the paper, the drying tunnel mechanism is used to heat the adhesive, the pressing mechanism is used to press the composite paper, and the winding mechanism is used to wind up the pressed composite paper.

[0015] The pressing mechanism based on the embodiments of this application employs a two-stage pressing method, allowing the composite paper to undergo a second pressing after the first pressing. This results in a better bonding effect between the film and the paper. Firstly, it improves the quality of the composite paper, preventing the formation of bubbles and white spots, and ensuring better gloss or matte finish. It also reduces the risk of paper-film separation. Secondly, compared to the prior art where only one pressing is used, which requires a large amount of adhesive to compensate for the poor bonding effect, this embodiment reduces adhesive usage while maintaining a good bonding effect, effectively lowering material costs. Finally, in this embodiment, the second pressing is performed directly using a heating roller structure and a second pressing roller structure, avoiding the need for an additional heating roller structure to perform the second pressing separately. This eliminates the need for a dual-unit setup, simplifying the pressing mechanism's structure and reducing its overall size, effectively minimizing its footprint in the workshop and saving electricity.

[0016] Furthermore, the peeling structure helps to peel the composite paper off the heating roller structure, preventing the composite paper from remaining attached to the heating roller structure after the second pressing, thus avoiding excessive bending of the composite paper and ensuring processing efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram illustrating the cooperation between the pressing mechanism and the composite paper according to an embodiment of this application; Figure 2 for Figure 1 The diagram shows the structure of the pressing mechanism. Figure 3 for Figure 2 A magnified view of a section at point A in the middle; Figure 4 for Figure 2 A magnified view of a section at point B in the middle.

[0019] Explanation of icon numbers: 100. Pressing mechanism; 10. Heating roller structure; 20. First pressing roller structure; 30. Second pressing roller structure; 31. Fixing plate; 32. Roller body; 33. Driving component; 40. Peeling structure; 41. Air nozzle; 411. Air outlet; 50. Primary pressing channel; 60. Secondary pressing channel; 61. Outlet; 300. Composite paper.

[0020] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0022] Where the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0023] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] Please see Figure 1 This application proposes a laminating machine. In the embodiments of this application, the laminating machine may include a feeder mechanism, an adhesive coating mechanism, a drying tunnel mechanism, a pressing mechanism 100, and a slitting mechanism or a winding mechanism arranged in sequence.

[0026] The feeder mechanism is used to feed the paper to the coating mechanism, which applies adhesive to the surface of the paper. After coating, the paper is sent to the drying tunnel mechanism, which heats the adhesive. After heating, the paper is sent to the pressing mechanism 100, where a film is applied to the surface of the paper with the adhesive to form a composite paper 300. The pressing mechanism 100 then presses the composite paper 300. After pressing, the composite paper 300 is sent to either the slitting mechanism or the winding mechanism. The slitting mechanism cuts the pressed composite paper 300, while the winding mechanism winds it up, thus completing the lamination process.

[0027] Please refer to the following: Figures 1-4 In this embodiment of the application, the pressing mechanism 100 is used to press the composite paper 300. Specifically, the pressing mechanism 100 may include a heating roller structure 10, a first pressing roller structure 20, a second pressing roller structure 30, and a peeling structure 40.

[0028] The heating roller structure 10 is sealed with a liquid, such as water or oil, and the liquid sealed in the heating roller structure 10 is heated by an electromagnetic heating cover to enable the heating roller structure 10 to have a constant temperature heating function. The heating roller structure 10 can be a mirror roller, so that the roughness of the outer surface of the heating roller structure 10 is less than or equal to 0.2μm, thereby achieving a high surface smoothness and effectively reducing defects generated in the composite paper 300 during the lamination process, improving processing quality. This embodiment does not limit the specific structure of the heating roller structure 10.

[0029] The first pressing roller structure 20 and the heating roller structure 10 cooperate to form a primary pressing channel 50 for the composite paper 300 to pass through. The heating roller structure 10 and the first pressing roller structure 20 are used to cooperate in performing a primary pressing on the composite paper 300 located in the primary pressing channel 50. It can be understood that during the process of the composite paper 300 passing through the primary pressing channel 50, the heating roller structure 10 and the first pressing roller structure 20 can continuously rotate and cooperate in pressing the composite paper 300 to achieve the primary pressing step.

[0030] The second pressing roller structure 30 and the heating roller structure 10 cooperate to form a secondary pressing channel 60 for the composite paper 300 to pass through after the first pressing. The heating roller structure 10 and the second pressing roller structure 30 cooperate to perform a secondary pressing on the composite paper 300 located in the secondary pressing channel 60. It can be understood that during the process of the composite paper 300 passing through the secondary pressing channel 60, the heating roller structure 10 and the second pressing roller structure 30 can continuously rotate and cooperate to press the composite paper 300 to achieve the secondary pressing step.

[0031] It is understandable that when the composite paper 300 leaves the secondary pressing channel 60 from the outlet 61, there is a chance that the composite paper 300 will adhere to the heating roller structure 10. This will cause the composite paper 300 to be too bent and unable to be sent to the slitting structure or the winding mechanism. It may even be necessary to stop the pressing mechanism 100 to manually separate the composite structure from the heating roller structure 10.

[0032] Therefore, in this embodiment, the peeling structure 40 is located at the outlet 61 of the secondary pressing channel 60 to enable the composite paper 300 to peel off from the heating roller structure 10 after leaving the secondary pressing channel 60 through the outlet 61. It is understood that when the composite paper 300 leaves the secondary pressing channel 60 through the outlet 61, the peeling mechanism applies force to the composite paper 300, thereby assisting in peeling the composite paper 300 off the heating roller structure 10.

[0033] This application's technical solution employs a two-stage pressing method, allowing the composite paper 300 to undergo a second pressing after the first pressing, resulting in a better bonding effect between the film and the paper. This firstly improves the quality of the composite paper 300, preventing the formation of bubbles and white spots, and ensuring better gloss or matte finish, while reducing the risk of paper-film separation. Secondly, compared to existing technologies with only one pressing stage, which require a large amount of adhesive to compensate for poor bonding, this embodiment reduces adhesive usage while maintaining good bonding results, effectively lowering material costs. Finally, in this embodiment, the heating roller structure 10 and the second pressing roller structure 30 are directly used for the second pressing, avoiding the need for an additional heating roller structure 10 to perform the second pressing separately. This eliminates the need for a dual-unit setup, simplifying the structure of the pressing mechanism 100 and reducing its overall size, effectively minimizing its footprint in the workshop and saving electricity.

[0034] It should be noted that the dual units described above consist of one set of units including a heating roller structure 10 and a first pressing roller structure 20, and the other set of units including another heating roller structure 10 and a second pressing roller structure 30.

[0035] Furthermore, based on the setting of the peeling structure 40, it can assist the composite paper 300 to be peeled off from the heating roller structure 10, and prevent the composite paper 300 from still adhering to the heating roller structure 10 after the second pressing is completed, thereby preventing the composite paper 300 from being too bent and ensuring processing efficiency.

[0036] Please refer to the following: Figures 1-4In some embodiments, the pressing mechanism 100 sequentially has a first pressing state, a second pressing state, and a third pressing state. It is understood that during the normal operation of the pressing mechanism 100, the pressing process of the pressing mechanism 100 on a composite paper 300 will switch from the first pressing state to the second pressing state, and then from the second pressing state to the third pressing state. In these three operating states, the composite paper 300 is always pressed by the pressing mechanism 100.

[0037] When the pressing mechanism 100 is in the first pressing state, part of the composite paper 300 is located in the primary pressing channel 50 and is pressed by the cooperation of the heated roller structure 10 and the first pressing roller structure 20.

[0038] like Figure 1 As shown, when the pressing mechanism 100 is in the second pressing state, part of the composite paper 300 is located in the primary pressing channel 50 and is pressed by the heated roller structure 10 and the first pressing roller structure 20, and part of it is located in the secondary pressing channel 60 and is pressed by the heated roller structure 10 and the second pressing roller structure 30.

[0039] When the pressing mechanism 100 is in the third pressing state, part of the composite paper 300 is located in the secondary pressing channel 60, and is pressed by the heated roller structure 10 and the second pressing roller structure 30.

[0040] Thus, when the pressing mechanism 100 is in the second pressing state, since the two sides of the composite paper 300 along its length direction are pressed by the heating roller structure 10 and the first pressing roller structure 20, and the heating roller structure 10 and the second pressing roller structure 30 respectively, the middle area of ​​the composite paper 300 along its length direction will be in contact with the heating roller structure 10. Therefore, the heating roller structure 10 can perform constant temperature pressing on the middle area, which can effectively extend the length of the composite paper 300 being pressed, further ensuring the tightness of the pressing between the film and the paper. This can improve the processing quality of the composite paper 300 while effectively reducing the amount of adhesive used.

[0041] Please refer to the following: Figures 1-4 Furthermore, in the second pressing state, the composite paper 300 has a contact surface that contacts the heating roller structure 10, wherein the length of the contact surface along the length direction of the composite paper 300 is greater than 200 cm. This arrangement effectively extends the pressing length of the composite paper 300 to ensure the pressing effect between the film and the paper.

[0042] For example, the length of the contact surface can be 300 cm to ensure that the composite paper 300 is pressed long enough to effectively improve the tightness of the bonding between the film and the paper.

[0043] Please refer to the following: Figures 1-3 In some embodiments, the second pressing roller structure 30 includes a fixed plate 31, a roller body 32, and a driving member 33. The roller body 32 is mounted on the fixed plate 31 and cooperates with the heating roller structure 10 to form a secondary pressing channel 60. The roller body 32 and the heating roller structure 10 are used to cooperate in secondary pressing of the composite paper 300 located in the secondary pressing channel 60. The driving member 33 can be in the form of a cylinder or a hydraulic cylinder, and this embodiment is not limited to this. The driving member 33 is drivenly connected to the fixed plate 31.

[0044] The drive unit 33 can drive the roller body 32 to move closer to or further away from the heating roller structure 10 through the fixed plate 31, so as to reduce or expand the size of the secondary pressing channel 60 accordingly, thereby increasing or decreasing the pressure of the roller body 32 and the heating roller structure 10 on the composite paper 300 for secondary pressing.

[0045] Thus, during the secondary pressing process, the pressure of the roller body 32 and the heating roller structure 10 on the composite paper 300 is adjustable, so that the pressure can be adjusted at any time according to the actual processing requirements. This can avoid the poor secondary pressing effect of the composite paper 300 due to insufficient pressure, and also avoid the damage to the composite paper 300 and the roller body 32 and the heating roller structure 10 caused by excessive pressure.

[0046] In some embodiments, the driving component 33 is a cylinder, one side of the fixing plate 31 is connected to the cylinder for transmission, and the other side is rotatably disposed. With this configuration, the fixing plate 31 can rotate in two directions accordingly under the pushing or contracting of the cylinder, thereby reducing or expanding the size of the primary pressing channel 50. The structure is simple and the operation is convenient.

[0047] Please refer to the following: Figures 1-3 In some embodiments, the roller body 32 includes a roller body and a colloid layer wrapped around the roller body, and the colloid layer and the heating roller structure 10 cooperate to form a secondary pressing channel 60. The Shore A hardness of the colloid layer is greater than or equal to 75 degrees and less than or equal to 93 degrees.

[0048] It is understandable that the surface of paper is uneven. Therefore, if the coating layer wrapped around the roller 32 is made of a rigid material, the existence of depressions will prevent the film from firmly adhering to the paper. Therefore, in this embodiment, because the colloid layer has elastic deformation properties, it can fill the depressions in the paper through elastic deformation during the secondary pressing process, ensuring uniform pressure during the secondary pressing and guaranteeing the effectiveness of the secondary pressing.

[0049] Furthermore, the Shore A hardness of the colloid layer is greater than or equal to 75 degrees and less than or equal to 93 degrees. It is understandable that if the Shore A hardness of the colloid layer is less than 75 degrees, the pressure of the colloid layer will be too low, and a good pressing effect cannot be achieved. If the Shore A hardness of the colloid layer is greater than 93 degrees, the colloid layer itself is too hard and cannot fill the depressions of the paper well through elastic deformation during the pressing process.

[0050] Please refer to the following: Figure 1 , Figure 2 as well as Figure 4 In some embodiments, the first pressing roller structure 20 may be close to or far from the heating roller structure 10 so that the size of the primary pressing channel 50 is adjustable, thereby making the pressure of the heating roller structure 10 and the first pressing roller structure 20 on the composite paper 300 adjustable.

[0051] In this embodiment, the first pressing roller structure 20 can be hydraulically adjusted to move closer to or further away from the heating roller structure 10, thereby correspondingly reducing or expanding the size of the primary pressing channel 50. This, in turn, increases or decreases the pressure exerted by the first pressing roller structure 20 and the heating roller structure 10 on the composite paper 300 during the primary pressing process. In this way, the pressure can be adjusted at any time according to actual processing needs, avoiding both insufficient pressure leading to poor primary pressing effect on the composite paper 300 and excessive pressure causing damage to the composite paper 300 during pressing, as well as damage to the first pressing roller structure 20 and the heating roller structure 10.

[0052] Please refer to the following: Figures 1-3 In some embodiments, the stripping structure 40 includes a gas supply structure (not shown) and a nozzle 41. The gas supply structure is connected to the nozzle 41 and is used to supply gas to the nozzle 41. The nozzle 41 is located at the outlet 61 and is oriented toward the outlet 61.

[0053] The air nozzle 41 is used to spray gas onto the composite paper 300 so that the composite paper 300 can be peeled off from the heating roller structure 10 after leaving the secondary pressing channel 60 through the outlet 61.

[0054] In this embodiment, gas is sprayed onto the composite paper 300 through the air nozzle 41. On the one hand, the temperature difference between the gas and the composite paper 300 is used to lower the temperature of the film, thereby reducing the film's adhesion and making it easier to peel the composite paper 300 off the heating roller structure 10. On the other hand, the force applied directly to the composite paper 300 by the gas is used to smooth the composite paper 300, making it easier to peel off the composite paper 300 off the heating roller structure 10. This method does not damage the composite paper 300 and ensures processing quality.

[0055] Please refer to the following: Figures 1-3 Furthermore, the nozzle 41 has an air outlet 411, which is positioned toward the outlet 61. The shape of the air outlet 411 can be flat or round.

[0056] The air outlet 411 is flat, so that the gas is in a laminar flow state after being ejected through the air outlet 411. In this way, the gas in a laminar flow state can smooth the composite paper 300 more smoothly and evenly, thereby further ensuring that the composite paper 300 can be peeled off from the heating roller structure 10.

[0057] Optionally, multiple air nozzles 41 are provided, and the multiple air nozzles 41 are spaced apart along the width direction of the composite paper 300. In this way, even if the width of the composite paper 300 is large, the multiple air nozzles 41 can work together to blow air onto most of the composite paper 300 to ensure that the composite paper 300 can be peeled off from the heating roller structure 10.

[0058] Please refer to the following: Figures 1-2 In some embodiments, the pressure of the gas ejected from the nozzle 41 into the composite paper 300 is greater than or equal to 0.3 MPa and less than or equal to 0.7 MPa. This ensures sufficient gas pressure while reducing the gas supply pressure of the gas supply structure.

[0059] Understandably, if the gas pressure is less than 0.3 MPa, the force exerted by the gas on the composite paper 300 is too small to smooth it out. If the gas pressure is greater than 0.7 MPa, the gas supply pressure of the gas supply structure will be too high, and a larger gas supply structure may even be required.

[0060] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0061] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pressing mechanism, characterized in that, For laminating composite paper, the composite paper comprising paper and a film covering the surface of the paper, including: Heating roller structure; The first pressing roller structure cooperates with the heating roller structure to form a primary pressing channel for the composite paper to pass through. The heating roller structure and the first pressing roller structure are used to cooperate to perform a primary pressing on the composite paper located in the primary pressing channel. The second pressing roller structure, in cooperation with the heating roller structure, forms a secondary pressing channel for the composite paper, after the first pressing, to pass through. The heating roller structure and the second pressing roller structure cooperate to perform a secondary pressing of the composite paper located within the secondary pressing channel; and A peeling structure is provided at the exit of the secondary pressing channel to enable the composite paper to peel off from the heating roller structure after it leaves the secondary pressing channel through the exit.

2. The pressing mechanism as described in claim 1, characterized in that, The pressing mechanism has a first pressing state, a second pressing state, and a third pressing state in sequence; When the pressing mechanism is in the first pressing state, a portion of the composite paper is located in the primary pressing channel so as to be pressed by the heating roller structure and the first pressing roller structure. When the pressing mechanism is in the second pressing state, part of the composite paper is located in the primary pressing channel to be pressed by the heating roller structure and the first pressing roller structure, and part of it is located in the secondary pressing channel to be pressed by the heating roller structure and the second pressing roller structure. When the pressing mechanism is in the third pressing state, a portion of the composite paper is located in the secondary pressing channel so as to be pressed by the heating roller structure and the second pressing roller structure.

3. The pressing mechanism as described in claim 2, characterized in that, In the second pressing state, the composite paper has a contact surface that contacts the heating roller structure; Wherein, along the length direction of the composite paper, the length of the contact surface is greater than 200 centimeters.

4. The pressing mechanism as described in claim 1, characterized in that, The second pressing roller structure includes: Fixing plate; A roller body, mounted on the fixed plate, and cooperating with the heating roller structure to form the secondary pressing channel, wherein the roller body and the heating roller structure are used to cooperate in the secondary pressing of the composite paper located within the secondary pressing channel; and The driving component is connected to the fixed plate in a driving manner; The driving component can move the roller body closer to or away from the heating roller structure via the fixed plate, thereby correspondingly reducing or expanding the size of the secondary pressing channel, and thus correspondingly increasing or decreasing the pressure of the roller body and the heating roller structure on the composite paper for secondary pressing.

5. The pressing mechanism as described in claim 4, characterized in that, The driving component is a cylinder, and one side of the fixed plate is connected to the cylinder for transmission, while the other side is rotatably disposed. And / or, the roller body includes a roller body and a colloid layer wrapped around the roller body, wherein the colloid layer and the heating roller structure cooperate to form the secondary pressing channel, wherein the Shore A hardness of the colloid layer is greater than or equal to 75 degrees and less than or equal to 93 degrees.

6. The pressing mechanism as described in claim 1, characterized in that, The first pressing roller structure can be close to or far from the heating roller structure so that the size of the primary pressing channel is adjustable, thereby making the pressure of the heating roller structure and the first pressing roller structure on the composite paper adjustable for primary pressing.

7. The pressing mechanism as described in any one of claims 1-6, characterized in that, The stripping structure includes a gas supply structure and a gas nozzle. The gas supply structure is connected to the gas nozzle and is used to supply gas to the gas nozzle. The gas nozzle is located at the outlet and faces the outlet. The air nozzle is used to spray gas onto the composite paper so that the composite paper can be peeled off from the heating roller structure after leaving the secondary pressing channel through the outlet.

8. The pressing mechanism as described in claim 7, characterized in that, The air nozzle has an air outlet, which is positioned facing the outlet. The air outlet is flat so that the gas is in a laminar flow state after being ejected through the air outlet.

9. The pressing mechanism as described in claim 8, characterized in that, The air nozzles include a plurality of air nozzles, and the plurality of air nozzles are arranged at intervals along the width direction of the composite paper; And / or, the pressure of the gas ejected from the nozzle onto the composite paper is greater than or equal to 0.3 MPa and less than or equal to 0.7 MPa.

10. A laminating machine, characterized in that, The device includes a feeder mechanism, a glue coating mechanism, a drying tunnel mechanism, a pressing mechanism as described in any one of claims 1-9, and a slitting mechanism arranged in sequence. The feeder mechanism is used to feed the paper to the glue coating mechanism, the glue coating mechanism is used to coat the surface of the paper with adhesive, the drying tunnel mechanism is used to heat the adhesive, the pressing mechanism is used to press the composite paper together, and the slitting mechanism is used to cut the pressed composite paper. Alternatively, the laminating machine includes a feeder mechanism, an adhesive coating mechanism, a drying tunnel mechanism, a pressing mechanism as described in any one of claims 1-9, and a winding mechanism arranged in sequence. The feeder mechanism is used to feed the paper to the adhesive coating mechanism, the adhesive coating mechanism is used to apply adhesive to the surface of the paper, the drying tunnel mechanism is used to heat the adhesive, the pressing mechanism is used to press the composite paper, and the winding mechanism is used to wind up the pressed composite paper.

Images