Laminated corrugated board production device
By controlling the temperature of the lower tile roller and pressing roller, the problem of the film easily deformed when the corrugated paper is pressed, and efficient production of coated corrugated cardboard is achieved, which improves production efficiency.
Patent Information
- Application Number
- CN202411989070.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-05-02
AI Technical Summary
High temperature is required when shaping corrugated paper and coated paper, but the film on coated paper cannot withstand high temperatures and deform or wrinkle, resulting in low production efficiency of coated corrugated paperboard.
By controlling the temperature of the lower tile roller and pressurized roller, ensure that the temperature at the contact point between the corrugated paper and the coated surface paper reaches the minimum temperature required for slurry gelatinization, while preventing the coated surface paper film from deforming or wrinkling due to high temperatures.
It achieves the compression efficiency of corrugated paper and coated surface paper without damaging the film quality, and simultaneously produces corrugated cardboard and coated corrugated cardboard, which improves the overall production efficiency.
Smart Images
Figure CN119910915A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a corrugated paperboard production device, in particular to a film-laminated corrugated paperboard production 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 board production device to solve the contradiction that a high temperature is required when corrugated paper and film-coated surface paper are pressed to form corrugated paper, while the film on the film-coated surface paper cannot withstand high temperatures 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 a 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 board in one step.
[0007] A film-coated corrugated paperboard production device comprises a first base paper rack, a film-coating machine, a film-coated corrugated paperboard pasting device and a second base paper rack; the first base paper rack can deliver face paper to the film-coating machine through a guide wheel; the film-coating machine can film the face paper and deliver the film-coated face paper to the film-coated corrugated paperboard pasting device through a guide wheel; the second base paper rack can deliver corrugated paper to the film-coated corrugated paperboard pasting device through a guide wheel; the film-coated corrugated paperboard pasting device comprises a corrugated paper conveying mechanism, a film-coated face paper, and a film-coated face paper. A paper conveying mechanism and a temperature control unit; the corrugated paper conveying mechanism includes a lower roller bonded to the corrugated paper, and the coated surface paper conveying mechanism includes 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. The first base paper rack and the second base paper rack can control the tension of the face paper and the corrugated paper so that they can enter the laminating machine and the laminating corrugated board pasting device normally; in the laminating corrugated board pasting device, the corrugated paper forms corrugations in the corrugated paper conveying mechanism and is conveyed to the lower roller, and the laminating face paper is conveyed to the pressure roller in the laminating face paper conveying mechanism, and the laminating face paper and the corrugated paper are pressed together to form the laminating corrugated paper through the meshing relationship between the pressure roller and the lower roller. In this process, the temperature of the pressure roller is controlled by the temperature control unit so that the film on the laminating face paper does not deform or wrinkle, and the temperature of the lower roller is controlled so that the slurry on the corrugated paper can be gelatinized normally and pasted with the laminating face 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 can rotate around its own axis, and the sizing roller is in meshing contact with the lower roller and can 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] Furthermore, the corrugated paper conveying mechanism further 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 passes through the third preheating cylinder and the upper roller in sequence to be preheated and then enters the lower roller, and the corrugated paper passes through the third preheating cylinder and the upper roller in sequence to be preheated 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.
[0015] Furthermore, the coated corrugated paperboard production device also includes a bridge and a traction conveyor device, the first base paper frame, the laminating machine, the coated corrugated paperboard pasting device and the second base paper frame are all arranged in the bridge, the bridge is also provided with a plurality of guide wheels, the traction conveyor device is arranged on the bridge; the coated corrugated paperboard pasting device can deliver the coated corrugated paperboard to the bridge through the traction conveyor device. The traction conveyor device applies a certain pulling force to the coated corrugated paperboard formed in the coated corrugated paperboard pasting device to transport it to the bridge for the convenience of the next step.
[0016] Furthermore, the coated corrugated cardboard production device also includes a single-wall slitting machine, and the coated corrugated cardboard on the bridge can be sent to the single-wall slitting machine through a guide wheel; the single-wall slitting machine can cut the corrugated cardboard into strips and slices. According to customer needs, the single-wall slitting machine can cut the corrugated cardboard into products of different shapes and sizes.
[0017] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 The present invention is a process flow chart for producing coated corrugated paperboard in the prior art;
[0019] Figure 2 Another process flow chart for producing coated corrugated paperboard in the prior art;
[0020] Figure 3 It is a structural schematic diagram of the film-laminated corrugated paperboard production device of the present invention;
[0021] Figure 4It is a structural schematic diagram of the film-laminated corrugated paperboard pasting device of the present invention;
[0022] Figure 5 This is a schematic diagram of the structure of coated corrugated paperboard;
[0023] Figure numerals: 10-corrugated paper; 12-corrugated; 20-laminated face paper; 22-film; 24-face paper; 30-laminated corrugated board pasting device; 312-pressure roller; 314-first preheating cylinder; 316-second preheating cylinder; 322-upper tile roller; 324-lower tile roller; 326-sizing roller; 328-third preheating cylinder; 40-laminated corrugated board; 50-bridge; 51-first guide wheel; 52-second guide wheel; 53-third guide wheel; 54-fourth guide wheel; 55-fifth guide wheel; 56-sixth guide wheel; 57-seventh guide wheel; 60-first base paper rack; 70-laminator; 80-second base paper rack; 90-traction conveyor device; 95-single tile slitting machine. DETAILED DESCRIPTION
[0024] 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.
[0025] 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.
[0026] 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.
[0027] In view of this series of problems, the present invention proposes a novel film-coated corrugated paperboard production device, which includes a film-coated corrugated paperboard pasting device to solve the contradiction that a high temperature is required when the corrugated paper and the film-coated surface paper are pressed together, while the film on the film-coated 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 film-coated surface paper, so that when the film-coated surface paper is pressed together with the corrugated paper, the film will not be deformed or wrinkled due to the high temperature, thereby forming the film-coated corrugated paperboard in one step.
[0028] The following is a detailed description of the film-laminated corrugated paperboard production device designed by the present invention in conjunction with the accompanying drawings.
[0029] See also Figures 1 to 3 The coated corrugated paperboard production device comprises a coated corrugated paperboard pasting device 30, a bridge frame 50, a first base paper rack 60, a laminating machine 70, a second base paper rack 80, a traction conveying device 90 and a single-wall slitting machine 95. The first base paper rack 60, the laminating machine 70, the coated corrugated paperboard pasting device 30 and the second base paper rack 80 are all arranged in the bridge frame 50, the traction conveying device 90 is arranged on the bridge frame 50, and a plurality of guide wheels are also arranged in the bridge frame 50. The first base paper rack 60 can deliver the face paper to the laminating machine 70 through the first guide wheel 51. The laminating machine 70 can laminate the face paper and deliver the coated face paper to the coated corrugated paperboard pasting device 30 through the second guide wheel 52 and the third guide wheel 53. The second base paper rack 80 can deliver the corrugated paper to the coated corrugated paperboard pasting device 30 through the fourth guide wheel 54. The coated corrugated paperboard pasting device 30 includes 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 10 to form a coated corrugated paperboard 40. The traction conveying device 90 can traction the coated corrugated paperboard 40 to the bridge 50 through the fifth guide wheel 55. The coated corrugated paperboard 40 on the bridge 50 can be conveyed to the single-wall slitting machine 95 through the sixth guide wheel 56, and the coated corrugated paperboard 40 is sliced into products of different shapes and sizes by the single-wall slitting machine 95. In this process, the temperature of the corrugated paper conveying mechanism and the coated surface paper conveying mechanism is controlled by the temperature control unit so that the film on the coated surface paper does not deform or wrinkle, and at the same time, the slurry on the corrugated paper can be gelatinized normally and adhered to the coated surface paper.
[0030] The coated surface paper conveying mechanism includes a pressure roller 312, and the corrugated paper conveying mechanism includes an upper roller 322, a lower roller 324, and a sizing roller 326. The pressure roller 312, the upper roller 322, the lower roller 324, and the sizing roller 326 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 322 and the lower roller 324; the lower roller 324 contacts the upper roller 322, the sizing roller 326, and the pressure roller 312 in sequence along its rotation direction. The corrugated paper 10 first enters the upper roller 322, and the rotation of the upper roller 322 drives the corrugated paper 10 to enter the meshing area where the upper roller 322 contacts the lower roller 324. The multiple arc-shaped protrusions of the upper roller 322 can be sequentially embedded in the gap between every two arc-shaped protrusions of the lower roller 324. The arc-shaped protrusions on the circumferential surfaces of the upper roller 322 and the lower roller 324 are pressed together to form multiple wavy corrugations 12 on the corrugated paper, and the corrugations 12 attached to the coated surface paper 20 can play a supporting role. Next, the corrugated paper is transferred to the lower roller 324 and rotates with the lower roller 324. The rotation of the lower roller 324 drives the corrugated paper that has been corrugated to enter the contact area between the lower roller 324 and the sizing roller 326. The sizing roller 326 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 324 and the corrugated paper 12 at the contact point between the coated surface paper 20. The lower roller 324 continues to rotate, driving the corrugated paper coated with slurry into the meshing area where the lower roller 324 contacts the pressure roller 312; at the same time, the coated surface paper 20 with the film 22 also enters the meshing area where the lower roller 324 contacts the pressure roller 312 through the rotation of the pressure roller 312. 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 312 and the lower roller 324, that is, the coated corrugated paperboard 40.
[0031] In this embodiment, the material of the film on the coated surface paper 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 production 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.
[0032] During the whole process, the temperature control unit is electrically connected to the pressure roller 312, the upper roller 322, and the lower roller 324, 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 312 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 322 and the lower roller 324 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 312 during the production process is higher than the gelatinization temperature, which is 140-150°C in this embodiment. The temperature of the film is always controlled within a temperature range close to that of the pressure roller 312 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 324 is controlled at 140-150°C so that the temperature transmitted from the lower roller 324 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. At the same time, when the corrugated paper 10 rotates at the upper roller 322, since the temperature of the upper roller 322 is also 140-150°C, the corrugated paper is first preheated to a certain temperature at the upper roller 322 to reduce the temperature difference that the corrugated paper 10 needs to be heated at the lower roller 324, thereby increasing the rotation speed of the lower roller 324 and thus improving production efficiency.
[0033] Furthermore, the laminating face paper conveying mechanism further includes a first preheating cylinder 314 and a second preheating cylinder 316, and the corrugated paper conveying mechanism further includes a third preheating cylinder 328. The first preheating cylinder 314, the second preheating cylinder 316, and the third preheating cylinder 328 are electrically connected to the temperature control unit. The temperature of the first preheating cylinder 314 and the second preheating cylinder 316 is controlled to be lower than the temperature of the pressure roller 312, so as to preheat the laminating 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 316 is 70°C. The temperature of the third preheating cylinder 328 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 paper 20 passes through the first preheating cylinder 314 and the second preheating cylinder 316 in sequence and then wraps around the circumferential surface of the pressure roller 312 and rotates with it. The corrugated paper 10 first passes through the third preheating cylinder 328 and then passes through the seventh guide wheel 57 to wrap around the circumferential surface of the upper roller 322 and rotates with it. The coated paper 20 is heated in advance by the first preheating cylinder 314 and the second preheating cylinder 316, thereby reducing the temperature difference when the pressure roller 312 heats the coated paper 20, so as to increase the rotation speed of the pressure roller 312 and thus improve the production efficiency; similarly, the corrugated paper 10 is heated in advance by the third preheating cylinder 328, thereby reducing the temperature difference when the upper roller 322 heats the corrugated paper 10, so as to increase the rotation speed of the upper roller 322 and the lower roller 324 and thus improve the production efficiency.
[0034] 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 312, the upper roller 322, the lower roller 324, the first preheating cylinder 314, the second preheating cylinder 316 and the third preheating cylinder 328 by the temperature control unit also changes accordingly.
[0035] In actual use, the temperature control unit is first started in advance to heat the first preheating cylinder 314, the second preheating cylinder 316, the third preheating cylinder 328, the pressure roller 312, the upper roller 322, and the lower roller 324 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 314, the second preheating cylinder 316 and the pressure roller 312 in the coated surface paper conveying mechanism and is heated. The corrugated paper 10 passes through the third preheating cylinder 328, the upper roller 322 and the lower roller 324 and is heated. The sizing roller 326 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 312 and the lower roller 324 to form a coated corrugated board 40.
[0036] Compared with the prior art, the film-laminated corrugated paperboard production 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-laminated surface paper are pressed together for forming through the temperature control unit in the film-laminated corrugated paperboard pasting device, so that the temperature at the contact point between the corrugated paper and the film-laminated surface paper can meet the minimum temperature requirement for smooth pressing, and at the same time, the temperature at the film of the film-laminated surface paper can be controlled not to be higher than the melting point of the film, so as to avoid deformation or wrinkling 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-laminated corrugated paperboard.
[0037] 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.
[0038] 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 paperboard production device, characterized in that: The invention comprises a first base paper rack, a laminating machine, a laminating corrugated paperboard pasting device and a second base paper rack; the first base paper rack can deliver the face paper to the laminating machine through a guide wheel; the laminating machine can laminat the face paper and deliver the laminating face paper to the laminating corrugated paperboard pasting device through a guide wheel; the second base paper rack can deliver the corrugated paper to the laminating corrugated paperboard pasting device through a guide wheel; the laminating corrugated paperboard pasting device comprises a corrugated paper conveying mechanism, a laminating face paper conveying mechanism and a temperature control unit; the corrugated paper conveying mechanism comprises a lower roller for laminating the corrugated paper, and the laminating face paper conveying mechanism comprises a pressure roller for laminating the film of the laminating face paper; the lower roller and the pressure roller press the corrugated paper and the laminating face paper; 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 laminating face paper is deformed or wrinkled, and controls the temperature of the lower roller to be greater than the gelatinization temperature of the slurry attached to the contact between the corrugated paper and the laminating face paper.
2. The film-coated corrugated paperboard production device according to claim 1, 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 paperboard production device according to claim 2, 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 production 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 paperboard production device according to claim 4, 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 contact the lower roller to sizing the corrugated paper on the lower roller.
6. The film-coated corrugated paperboard production device according to claim 5, 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 paperboard production device according to claim 6, 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-laminated corrugated paperboard production device according to claim 7, 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.
9. The film-coated corrugated paperboard production device according to any one of claims 5 to 8, characterized in that: It also includes a bridge and a traction conveying device, wherein the first base paper rack, the laminating machine, the coated corrugated cardboard pasting device and the second base paper rack are all arranged in the bridge, and a plurality of guide wheels are also arranged in the bridge. The traction conveying device is arranged on the bridge; the corrugated cardboard pasting device can deliver the coated corrugated cardboard to the bridge through the traction conveying device.
10. The film-laminated corrugated paperboard production device according to claim 9, characterized in that: The invention also comprises a single-wall slitting machine, to which the coated corrugated paperboard on the bridge can be sent through a guide wheel, and the single-wall slitting machine can cut the corrugated paperboard into strips and slices.