Film-coated corrugated board pasting device

Abstract

The invention relates to a corrugated paper pasting device, in particular to a film-coated corrugated paper pasting device. The device comprises a corrugated paper conveying mechanism, a film covering surface paper conveying mechanism and a temperature control unit, the corrugated paper conveying mechanism comprises a lower corrugated roller attached to corrugated paper, and the film covering surface paper conveying mechanism comprises a pressurizing roller attached to a film of film covering surface paper. The lower corrugated roller and the pressure roller are used for pressing the corrugated paper and the film-coated surface paper; the temperature control unit is used for controlling the temperature of the pressurizing roller to be lower than or equal to the lowest temperature at which a film on the film covering surface paper deforms or wrinkles, and controlling the temperature of the lower corrugated roller to be higher than the gelatinization temperature of slurry attached to the contact part of the corrugated paper and the film covering surface paper. The laminating mode of laminating and corrugated forming can be carried out on the same production line, and the production efficiency of the laminated corrugated board is improved.

Description

Technical Field

[0001] The invention relates to a corrugated paper pasting device, in particular to a film-coated corrugated paperboard pasting device. Background Art

[0002] With the development of China's express delivery business, the packaging industry's demand for packaging materials has increased, driving the development of the corrugated paper industry. The existing production of corrugated paperboard uses a meshing relationship between a pressure roller and a lower roller to press the face paper wrapped around the pressure roller with the corrugated paper wrapped around the lower roller. The slurry attached to the corrugations on the corrugated paper will gelatinize at temperatures above 80°C. The temperature transmitted by the pressure roller and the upper roller gelatinizes the corrugated paper and the face paper, and then the corrugated paper and the face paper are bonded together.

[0003] However, when transporting some agricultural products such as fresh fruits and vegetables, higher requirements are placed on the freshness preservation and moisture-proof ability of the corrugated cardboard used for packaging. Currently, the freshness preservation and moisture-proof ability of the corrugated cardboard is usually improved by covering the surface of the corrugated cardboard with a layer of film to form a coated corrugated cardboard.

[0004] See also Figure 1 In the prior art, the transfer lamination method is usually used to coat the corrugated cardboard. The transfer lamination method coats the film 22 on the corrugated cardboard by heat transfer. During the production process, the corrugated paper 10 and the face paper 24 are first pressed into a corrugated cardboard, and then the corrugated cardboard is transferred to the transfer lamination equipment, and the film 22 is coated on the corrugated cardboard to form a coated corrugated cardboard 50. Since the production efficiency of the transfer lamination is much lower than that of the production of corrugated paper, if it is carried out on the same production line, it will make it difficult for the production speed of the corrugated cardboard and the speed of the transfer lamination to form a production rate synchronization. The production efficiency of the corrugated cardboard must be reduced to match the transfer efficiency, resulting in low overall production efficiency of the coated corrugated cardboard.

[0005] Another method of laminating corrugated paperboard in the prior art is lamination. Lamination is achieved by heating and pressing the film 22 and the paper 24 on both sides to fuse them together. The production efficiency of lamination is greatly improved compared to transfer lamination, and it can be synchronized with the production efficiency of corrugated paperboard. However, if the lamination process is set after the corrugated paperboard is formed, the corrugations in the corrugated paperboard will be flattened due to the pressure during lamination, and good quality laminated corrugated paperboard cannot be formed. Please refer to Figure 2If the lamination process is set before the corrugated board is formed, that is, the coated surface paper 20 with the film 22 is formed first, and then the coated surface paper 20 and the corrugated paper 10 are pressed together to form the coated corrugated board 50, the high temperature required when pressing the corrugated board and the coated surface paper 20 will cause the film 22 on the coated surface paper 20 to deform, wrinkle or even melt, and the coated corrugated board 50 cannot be formed. Summary of the invention

[0006] Based on this, the purpose of the present invention is to provide a film-coated corrugated paperboard pasting device to solve the contradiction that a high temperature is required when corrugated paper and film-coated surface paper are pressed into corrugated paper, while the film on the film-coated surface paper cannot withstand high temperature to prevent deformation or wrinkling. The device controls the temperature of the lower roller in contact with the corrugated paper and the pressure roller in contact with the film-coated surface paper, so that when the surface paper with the film is pressed with the corrugated paper, the temperature at the contact point of the film-coated surface paper and the corrugated paper can reach the minimum temperature required for slurry gelatinization, and at the same time, the film on the other side of the film-coated surface paper will not deform or wrinkle due to high temperature, thereby forming the film-coated corrugated paperboard in one step.

[0007] A film-coated corrugated paperboard pasting device includes a corrugated paper conveying mechanism, a film-coated surface paper conveying mechanism and a temperature control unit; the corrugated paper conveying mechanism includes a lower roller bonded to the corrugated paper, and the film-coated surface paper conveying mechanism includes a pressure roller bonded to the film of the film-coated surface paper; the lower roller and the pressure roller press the corrugated paper and the film-coated surface paper together; the temperature control unit controls the temperature of the pressure roller to be less than or equal to the minimum temperature at which the film on the film-coated surface paper deforms or wrinkles, and controls the temperature of the lower roller to be greater than the gelatinization temperature of the slurry attached to the contact point between the corrugated paper and the film-coated surface paper. The corrugated paper forms corrugations in the corrugated paper conveying mechanism and is conveyed to the lower roller, and the film-coated surface paper is transported to the pressure roller in the film-coated surface paper conveying mechanism, and the film-coated surface paper and the corrugated paper are pressed together to form the film-coated corrugated paper through the meshing relationship between the pressure roller and the lower roller. In this process, the temperature control unit controls the temperature of the pressure roller so that the film on the coated surface paper does not deform or wrinkle, and controls the temperature of the lower roller so that the slurry on the corrugated paper can gelatinize normally and adhere to the coated surface paper.

[0008] Furthermore, the temperature control unit controls the temperature of the pressure roller to be lower than the lowest temperature at which the film on the coated surface paper deforms or wrinkles; and controls the temperature of the lower roller to increase as the production speed of the coated corrugated board increases. When the production speed of the coated corrugated board increases, the time it contacts the lower roller and the pressure roller becomes shorter. If the temperature of the lower roller is kept constant, the heat transferred to the contact point between the coated surface paper and the corrugated board will decrease. Therefore, the temperature of the lower roller is increased to compensate for the decrease in heat. At the same time, the temperature of the pressure roller is controlled to be lower than the lowest temperature at which the film deforms or wrinkles, so as to prevent the film from deforming or wrinkling.

[0009] Furthermore, the film on the coated surface paper is made of PPE or OPE, and the production speed of the coated corrugated board is greater than or equal to 80 m / min. The temperature control unit controls the temperature of the pressure roller at 100°C or below, and the temperature control unit controls the temperature of the lower roller at 140°C or above, ensuring that the temperature of the film during the lamination of the corrugated paper and the coated surface paper is always maintained close to the temperature of the pressure roller to avoid deformation or wrinkling. At the same time, the temperature of the contact point between the corrugated paper and the surface paper of the coated surface paper is increased, so that the slurry can be smoothly gelatinized and the corrugated paper can be smoothly pressed onto the coated surface paper.

[0010] Furthermore, the lower roller contacts and rotates synchronously with the pressure roller, and the pressure roller applies a certain pressure to the lower roller, and the corrugated paper and the coated surface paper are bonded together through the slurry attached to the contact point between the corrugated paper and the coated surface paper.

[0011] Furthermore, the corrugated paper conveying mechanism also includes a sizing roller, which contacts the lower roller and sizing the corrugated paper on the lower roller.

[0012] Furthermore, the corrugated paper conveying mechanism also includes an upper roller, and the circumferential surfaces of the upper roller and the lower roller are arrayed with a plurality of arc-shaped protrusions; the arc-shaped protrusions of the upper roller can be embedded in the gap between the arc-shaped protrusions of the lower roller, and the corrugated paper is pressed by the matching relationship between the arc-shaped protrusions of the upper roller and the lower roller to form a plurality of protruding wavy corrugations; the upper roller is connected to the temperature control unit, and the temperature control unit controls the temperature of the upper roller to be equal to or less than the temperature of the lower roller, so that the upper roller preheats the corrugated paper in advance, thereby improving the operation efficiency of the entire production line.

[0013] Furthermore, the coated paper conveying mechanism also includes a first preheating cylinder and a second preheating cylinder; the temperature control unit controls the temperature of the first preheating cylinder to be lower than the temperature of the pressure roller; and controls the temperature of the second preheating cylinder to be higher than the temperature of the first preheating cylinder and lower than the temperature of the pressure roller. The coated paper is preheated in turn by the first preheating cylinder and the second preheating cylinder, and then enters the pressure roller, so as to preheat the coated paper in advance to improve the operating efficiency of the production line.

[0014] Further, the temperature of the first preheating cylinder is controlled at 40-50°C, and the temperature of the second preheating cylinder is controlled at 70°C;

[0015] Furthermore, the corrugated paper conveying mechanism also includes a third preheating cylinder, and the temperature control unit controls the temperature of the third preheating cylinder to be lower than the temperature of the lower roller; the corrugated paper is preheated by the third preheating cylinder and the upper roller in sequence and then enters the lower roller, and the corrugated paper is preheated by the third preheating cylinder and the upper roller in sequence and then enters the lower roller. The corrugated paper first passes through the second preheating cylinder to preheat the corrugated paper in advance to improve the operating efficiency of the production line. Furthermore, the temperature control unit controls the temperature of the third preheating cylinder to be 80-90°C. In order to better understand and implement, the present invention is described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a process flow chart for producing coated corrugated paperboard in the prior art;

[0017] Figure 2 Another process flow chart for producing coated corrugated paperboard in the prior art;

[0018] Figure 3 It is a structural schematic diagram of the film-laminated corrugated paperboard pasting device of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of coated corrugated paperboard;

[0020] Figure 5 This is a schematic diagram of the structure of the laminated corrugated cardboard pasting area.

[0021] Figure numerals: 10-corrugated paper; 12-corrugated; 20-laminated paper; 22-film; 24-paper; 32-pressure roller; 34-first preheating cylinder; 36-second preheating cylinder; 42-upper roller; 44-lower roller; 46-sizing roller; 48-third preheating cylinder; 50-laminated corrugated paperboard. DETAILED DESCRIPTION

[0022] In the process of laminating the coated face paper and the corrugated paper to form the corrugated board, if the face paper and the corrugated paper are to be successfully pressed into the corrugated board, the temperature at the contact point between the corrugated paper and the face paper needs to exceed the gelatinization temperature of the slurry on the corrugated paper. However, in the existing pressing mechanism, the temperature of the pressure roller in contact with the face paper and the lower roller in contact with the corrugated paper are consistent. If the face paper is replaced with the coated face paper, that is, a layer of film is added to the face paper, usually PPE or OPE film, which has a melting point of 150°C, and it will wrinkle and deform at more than 100°C. The production speed of pressing the corrugated board into shape is very fast, and it takes a certain amount of time for the temperature of the pressure roller and the lower roller to be transmitted to the joint of the corrugated paper and the face paper. In order to improve production efficiency, the temperature of the pressure roller and the upper roller must be increased, resulting in the temperature of the film on the coated face paper being greater than the temperature at which it deforms, which will cause the film on the coated face paper to be directly affected by the high temperature and deform or wrinkle, resulting in a low yield.

[0023] Therefore, in order to solve this problem, the present invention first attempts to reduce the temperature of the pressure roller to prevent the film on the coated face paper in contact with the pressure roller from being deformed or wrinkled. However, during the lamination process, although the film on the face paper is not deformed or wrinkled, the temperature of the pressure roller is reduced, and the temperature at the contact point between the coated face paper and the corrugated paper is increased by the temperature of the pressure roller and the lower roller. This in turn causes the temperature at the contact point between the coated face paper and the corrugated paper to fail to reach the gelatinization temperature of the slurry on the corrugated paper, and the coated corrugated board cannot be formed. In order to make the temperature at the contact point between the coated face paper and the corrugated paper reach the gelatinization temperature of the slurry on the corrugated paper, the present invention then attempts to reduce the production speed to extend the heat conduction time between the corrugated paper and the roller. However, due to the excessively high heat conduction efficiency of the film, after reducing the production speed, the temperature at the film quickly reaches a temperature close to the temperature of the pressure roller in contact with it. Although the temperature at the contact point between the coated face paper and the corrugated paper reaches the gelatinization temperature of the slurry on the corrugated paper, the film still wrinkles or deforms. Therefore, the present invention further reduces the temperature of the pressure roller to a temperature below which the film will deform and wrinkle, so that when the production speed is reduced, the temperature of the film can always be kept close to the temperature of the pressure roller, and deformation and wrinkling will not occur.

[0024] Furthermore, an attempt is made to increase the temperature of the lower roller so that the lower roller conducts the temperature of the contact point between the coated surface paper and the corrugated paper to increase, thereby compensating for the temperature loss at the contact point between the coated surface paper and the corrugated paper caused by the temperature reduction of the pressure roller. At the same time, the temperature of the lower roller will not be transmitted to the film of the coated surface paper in large quantities, causing the film to deform or wrinkle. The temperature difference between the lower roller and the pressure roller is coordinated to ensure that the temperature at the film and the temperature at the contact point between the coated surface paper and the corrugated paper can meet the requirements. At the same time, since the pressure roller and the lower roller transfer heat to the contact point between the coated surface paper and the corrugated paper by heat conduction, this heat transfer method makes the amount of heat received at the contact point between the coated surface paper and the corrugated paper largely depend on the contact time with the lower roller and the pressure roller. Therefore, if the production speed is increased by increasing the transmission speed of the corrugated paper, it is necessary to synchronously increase the temperature of the pressure roller and the upper roller to keep the contact point between the coated surface paper and the corrugated paper consistent at different production speeds.

[0025] In view of this series of problems, the present invention proposes a novel laminating corrugated paperboard pasting device to solve the contradiction that a high temperature is required when the corrugated paper and the laminating surface paper are pressed together, while the film on the laminating surface paper cannot withstand a high temperature to prevent deformation or wrinkling. The device controls the temperature of the lower roller in contact with the corrugated paper and the pressure roller in contact with the laminating surface paper so that when the laminating surface paper is pressed together with the corrugated paper, the film will not be deformed or wrinkled due to high temperature, thereby forming a laminating corrugated paperboard in one step.

[0026] The following is a detailed description of the device for pasting coated corrugated paperboards designed by the present invention in conjunction with the accompanying drawings.

[0027] See also Figures 1 to 3 The coated corrugated paperboard pasting device comprises a coated surface paper conveying mechanism, a corrugated paper conveying mechanism and a temperature control unit. The corrugated paper 10 forms corrugations 12 in the corrugated paper conveying mechanism, and the corrugated paper conveying mechanism contacts the coated surface paper conveying mechanism and presses the coated surface paper 20 in the coated surface paper conveying mechanism with the corrugated paper to form a coated corrugated paperboard 50. In this process, the temperature control unit controls the temperature of the corrugated paper conveying mechanism and the coated surface paper conveying mechanism so that the film 22 on the coated surface paper does not deform or wrinkle, and at the same time, the slurry on the corrugated paper 10 can be gelatinized normally, so as to be pasted with the coated surface paper 20.

[0028] The coated surface paper conveying mechanism includes a pressure roller 32, and the corrugated paper conveying mechanism includes an upper roller 42, a lower roller 44 and a sizing roller 46. The pressure roller 32, the upper roller 42, the lower roller 44 and the sizing roller 46 are cylindrical rollers that can rotate around their centers. A plurality of arc-shaped protrusions are arranged in an array on the circumferential surfaces of the upper roller 42 and the lower roller 44; the lower roller 44 contacts the upper roller 42, the sizing roller 46 and the pressure roller 32 in sequence along its rotation direction. The corrugated paper 10 first enters the upper roller 42, and the rotation of the upper roller 42 drives the corrugated paper 10 to enter the meshing area where the upper roller 42 contacts the lower roller 44. The multiple arc-shaped protrusions of the upper roller 42 can be sequentially embedded in the gap between every two arc-shaped protrusions of the lower roller 44. The arc-shaped protrusions on the circumferential surfaces of the upper roller 42 and the lower roller 44 are pressed together to form multiple wavy corrugations 12 on the corrugated paper 10, and the corrugations 12 attached to the coated surface paper 20 can play a supporting role. Then, the corrugated paper 10 is transferred to the lower roller 44 and rotates with the lower roller 44. The rotation of the lower roller 44 drives the corrugated paper 10 that has formed the corrugations 12 to enter the contact area between the lower roller 44 and the sizing roller 46. The sizing roller 46 continuously attaches slurry from a slurry barrel to its circumferential surface, and through its contact with the lower roller, applies the slurry attached to it to the corrugated paper 10 on the lower roller 44 and the corrugated paper 12 at the contact point between the coated surface paper 20 and the corrugated paper 10. The lower roller 44 continues to rotate, driving the corrugated paper 10 coated with slurry into the meshing area where the lower roller 44 contacts the pressure roller 32; at the same time, the coated surface paper 20 with the film 22 also enters the meshing area where the lower roller 44 contacts the pressure roller 32 through the rotation of the pressure roller 32. At this time, the coated surface paper 20 and the corrugated paper 10 are pressed into a whole through the meshing of the pressure roller 32 and the lower roller 44, that is, the coated corrugated paperboard 50.

[0029] In this embodiment, the material of the film 22 on the coated surface paper 20 is PPE or OPE, which has a melting point of 150°C and will deform or wrinkle when the temperature exceeds 100°C. The production speed of the coated corrugated cardboard pasting device is 80m / min, that is, the paper output speed of the coated corrugated cardboard produced from the Su Sohu coated corrugated cardboard pasting device is 80 meters per minute.

[0030] During the whole process, the temperature control unit is electrically connected to the pressure roller 32, the upper roller 42, and the lower roller 44, and controls the temperature thereof to control the temperature transmitted to the corrugated paper 10 or the coated surface paper 20. The temperature of the pressure roller 32 is controlled to be lower than the temperature at which the film 22 on the coated surface paper 20 deforms or wrinkles, which is 80-90°C in this embodiment; the temperature of the upper roller 42 and the lower roller 44 is controlled to be higher than the gelatinization temperature of the slurry attached to the contact point between the corrugated paper 10 and the coated surface paper 20, and can ensure that the temperature transmitted to the contact point between the corrugated paper 10 and the coated surface paper 20 together with the pressure roller 32 during the production process is higher than the gelatinization temperature, which is 140-150°C in this embodiment. The temperature of the film 22 is always controlled within a temperature range close to that of the pressure roller 32 and does not exceed 100°C, so that the coated surface paper 20 will not be deformed or wrinkled during the lamination process; at the same time, when the corrugated paper 10 is laminated with the coated surface paper 20, the temperature of the lower roller 44 is controlled at 140-150°C so that the temperature transmitted from the lower roller 44 to the corrugation 12 of the corrugated paper 10 can reach above 80°C, so that the slurry on it can be gelatinized smoothly, thereby laminating the corrugated paper 10 on the coated surface paper 20; if the temperature of the contact point between the corrugated paper 10 and the coated surface paper 20 is too low, the corrugated paper 10 cannot be smoothly pressed on the coated surface paper 20. At the same time, when the corrugated paper 10 rotates at the upper roller 42, since the temperature of the upper roller 42 is also 140-150°C, the corrugated paper 10 is first preheated to a certain temperature at the upper roller 42 to reduce the temperature difference that the corrugated paper 10 needs to be heated at the lower roller 44, thereby increasing the rotation speed of the lower roller 44 and thus improving production efficiency.

[0031] Furthermore, the coated face paper conveying mechanism further includes a first preheating cylinder 34 and a second preheating cylinder 36, and the corrugated paper conveying mechanism further includes a third preheating cylinder 48. The first preheating cylinder 34, the second preheating cylinder 36, and the third preheating cylinder 48 are electrically connected to the temperature control unit. The temperature of the first preheating cylinder 34 and the second preheating cylinder 36 is controlled to be lower than the temperature of the pressure roller 32, so as to preheat the coated face paper 20 in advance to increase the production speed; in this embodiment, the temperature of the first preheating cylinder 34 is 40-50°C, and the temperature of the second preheating cylinder 36 is 70°C. The temperature of the third preheating cylinder 48 is controlled to be lower than the temperature of the lower roller, so as to preheat the corrugated paper 10 in advance to increase the production speed; in this embodiment, the temperature of the third preheating cylinder 48 is 80-90°C. The coated surface paper 20 passes through the first preheating cylinder 34 and the second preheating cylinder 36 in sequence, and then wraps around the circumferential surface of the pressure roller 32 and rotates therewith. The corrugated paper 10 first passes through the third preheating cylinder 48, and then wraps around the circumferential surface of the upper roller 42 and rotates therewith. The coated surface paper 20 is heated in advance by the first preheating cylinder 34 and the second preheating cylinder 36, so as to reduce the temperature difference when the pressure roller 32 heats the coated surface paper 20, so as to increase the rotation speed of the pressure roller 32 and thus improve the production efficiency; similarly, the corrugated paper 10 is heated in advance by the third preheating cylinder 48, so as to reduce the temperature difference when the upper roller 42 heats the corrugated paper 10, so as to increase the rotation speed of the upper roller 42 and the lower roller 44 and thus improve the production efficiency.

[0032] In other embodiments, the material of the film on the coated surface paper and the production speed of the enchanted corrugated cardboard pasting device may change, but the temperature control of the pressure roller 32, the upper roller 42, the lower roller 44, the first preheating cylinder 34, the second preheating cylinder 36 and the third preheating cylinder 48 by the temperature control unit also changes accordingly.

[0033] In actual use, the temperature control unit is first started in advance to heat the first preheating cylinder 34, the second preheating cylinder 36, the third preheating bar 48, the pressure roller 32, the upper roller 42, and the lower roller 44 to reach their preset temperatures, and then the tension of the corrugated paper 10 and the coated surface paper 20 is controlled by the paper rack to feed the coated surface paper 20 and the corrugated paper 10 into the coated surface paper conveying mechanism and the corrugated paper conveying mechanism, respectively. The coated surface paper passes through the first preheating cylinder 34, the second preheating cylinder 36 and the pressure roller 32 in the coated surface paper conveying mechanism and is heated. The corrugated paper 10 passes through the third preheating cylinder 48, the upper roller 42 and the lower roller 44 and is heated. The sizing roller 46 is used to coat the corrugations 12 where the corrugations 10 and the coated surface paper 20 are in contact with each other. Finally, the corrugated paper 10 and the coated surface paper 20 are pressed together under the action of the pressure roller 32 and the lower roller 44 to form a coated corrugated board 50.

[0034] Compared with the prior art, the film-coated corrugated paperboard pasting device of the present invention can control the temperature of the film and the temperature of the corrugated paper when the corrugated paper and the film-coated surface paper are pressed and formed by the temperature control unit, so that the temperature at the contact point between the corrugated paper and the film-coated surface paper can meet the minimum temperature requirement for smooth pressing, and at the same time can control the temperature of the film of the film-coated surface paper not to be higher than the melting point of the film, so as not to deform or wrinkle during the pressing process. Further, the laminating method of pressing and laminating and corrugating forming can be carried out on the same production line, and the productivity can be synchronized, thereby improving the production efficiency of the film-coated corrugated paperboard.

[0035] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that, unless otherwise specified, "multiple" refers to two or more; the terms "first", "second", "third", etc. are only used to distinguish, rather than to describe a specific order or sequence, and cannot be understood as indicating or implying relative importance. The term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items. When the above description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. In the description of the present application, for those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0036] The above-mentioned embodiment only expresses a specific implementation of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A film-coated corrugated cardboard pasting device, characterized in that: It comprises a corrugated paper conveying mechanism, a coated surface paper conveying mechanism and a temperature control unit; the corrugated paper conveying mechanism comprises a lower roller bonded to the corrugated paper, and the coated surface paper conveying mechanism comprises a pressure roller bonded to the film of the coated surface paper; the lower roller and the pressure roller press the corrugated paper and the coated surface paper together; the temperature control unit controls the temperature of the pressure roller to be less than or equal to the minimum temperature at which the film on the coated surface paper deforms or wrinkles, and controls the temperature of the lower roller to be greater than the gelatinization temperature of the slurry attached to the contact point between the corrugated paper and the coated surface paper.

2. The film-coated corrugated cardboard pasting device according to claim 1 is characterized in that: The temperature control unit controls the temperature of the pressure roller to be lower than the lowest temperature at which the film on the coated surface paper deforms or wrinkles; and controls the temperature of the lower roller to increase as the production speed of the coated corrugated board increases.

3. The film-coated corrugated cardboard pasting device according to claim 2 is characterized in that: The film material on the coated surface paper is PPE or OPE, the production speed of the coated corrugated board is greater than or equal to 80m / min, the temperature control unit controls the temperature of the pressure roller at 100°C or below, and the temperature control unit controls the temperature of the lower roller at 140°C or above.

4. The film-coated corrugated paperboard pasting device according to any one of claims 1 to 3, characterized in that: The lower roller contacts with the pressure roller and rotates synchronously. The pressure roller applies a certain pressure to the lower roller and fits the corrugated paper and the coated surface paper together through the slurry attached to the contact point between the corrugated paper and the coated surface paper.

5. The film-coated corrugated cardboard pasting device according to claim 4 is characterized in that: The corrugated paper conveying mechanism also includes a sizing roller, which can take out slurry from a slurry barrel and adhere it to its circumferential surface, and then sizing the corrugated paper on the lower roller by contacting with the lower roller.

6. The film-coated corrugated cardboard pasting device according to claim 5 is characterized in that: The corrugated paper conveying mechanism also includes an upper roller, and the circumferential surfaces of the upper roller and the lower roller are arrayed with a plurality of arc-shaped protrusions; the arc-shaped protrusions of the upper roller can be embedded in the gap between the arc-shaped protrusions of the lower roller, and the corrugated paper is pressed by the matching relationship between the arc-shaped protrusions of the upper roller and the lower roller to form a plurality of protruding wavy corrugations; the upper roller is connected to the temperature control unit, and the temperature control unit controls the temperature of the upper roller to be equal to or less than the temperature of the lower roller.

7. The film-coated corrugated cardboard pasting device according to claim 6 is characterized in that: The coated paper conveying mechanism also includes a first preheating cylinder and a second preheating cylinder; the temperature control unit controls the temperature of the first preheating cylinder to be lower than the temperature of the pressure roller; and controls the temperature of the second preheating cylinder to be higher than the temperature of the first preheating cylinder and lower than the temperature of the pressure roller. The coated paper is preheated in turn through the first preheating cylinder and the second preheating cylinder, and then enters the pressure roller.

8. The film-coated corrugated cardboard pasting device according to claim 7 is characterized in that: The temperature control unit controls the temperature of the first preheating cylinder to be 40-50°C, and controls the temperature of the second preheating cylinder to be 70°C.

9. The film-coated corrugated cardboard pasting device according to claim 8, characterized in that: The corrugated paper conveying mechanism also includes a third preheating cylinder, and the temperature control unit controls the temperature of the third preheating cylinder to be lower than the temperature of the lower roller; the corrugated paper is preheated by the third preheating cylinder and the upper roller in sequence and then enters the lower roller.

10. The film-coated corrugated cardboard pasting device according to claim 9, characterized in that: The temperature control unit controls the temperature of the third preheating cylinder to be between 80°C and 90°C.

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