A multifunctional intelligent drying device for corrugated cardboard production

Abstract

The present invention relates to the technical field related to the production of corrugated cardboard, and discloses a multifunctional intelligent drying device for the production of corrugated cardboard, comprising a board feeding conveying device, a drying transmission device, a flattening cooling device, and a board discharging conveying device. The board feeding conveying device is connected to the drying transmission device, the drying transmission device is connected to the flattening cooling device, the flattening cooling device is connected to the board discharging conveying device, and the drying transmission device includes a protective frame; the flattening function can be performed while cooling the cardboard, effectively controlling the size change of the cardboard, reducing the shrinkage or expansion caused by temperature difference, and ensuring that the size of the produced cardboard is accurate and stable, which is particularly important for subsequent automated cutting, folding and other processes, reducing material waste and improving production accuracy, and the integrated flattening and cooling design can reduce the steps of the production process, simplify the operation process, shorten the processing cycle, and thus improve the output speed and efficiency of the entire production line.

Description

Technical Field

[0001] The present invention belongs to the technical field related to corrugated cardboard production, and more specifically, relates to a multifunctional intelligent drying device for corrugated cardboard production. Background Art

[0002] During the corrugated cardboard production process, the base paper contains a certain amount of moisture. After corrugating and gluing, the cardboard may contain a high level of moisture both inside and on its surface. If the cardboard is directly processed or stored, excessive moisture can cause deformation, reduced strength, and possibly mold. Therefore, drying is a critical step in ensuring consistent cardboard quality. However, existing corrugated cardboard production techniques suffer from the following drawbacks:

[0003] In the existing technology, corrugated cardboard production usually adopts simple drying by transport drying. Simple drying will lead to suboptimal drying system design. For example, uneven hot air distribution or stacking and tilting of cardboard during transportation may lead to uneven drying of cardboard, affecting product quality, such as local overdrying, bending or loss of strength.

[0004] In existing technologies, corrugated cardboard production typically uses self-cooling cardboard. The effectiveness of self-cooling is easily affected by the ambient temperature and humidity. This is particularly true in hot and humid seasons or regions, where the cooling effect is significantly reduced. This makes it difficult to ensure that the cardboard reaches the ideal moisture content and hardness, potentially affecting subsequent processing performance and the quality stability of the final product.

[0005] In the existing technology, during the production and drying process of corrugated cardboard, the evaporation of moisture in the cardboard will cause the material to shrink. If there is no timely flattening measures, the cardboard will easily bend, wavy, and warp at both ends, affecting its flatness and appearance quality.

[0006] Therefore, in view of this, the existing structure and defects are studied and improved, and a multifunctional intelligent drying device for corrugated cardboard production is provided, in order to achieve a more practical and valuable purpose. Summary of the Invention

[0007] The present invention provides a multifunctional intelligent drying device for corrugated board production, which is used to overcome the above-mentioned defects in the prior art.

[0008] The purpose and function of the multifunctional intelligent drying device for corrugated cardboard production of the present invention are achieved by the following specific technical means:

[0009] A multifunctional intelligent drying device for corrugated cardboard production, comprising a board feeding conveying device, a drying transmission device, a flattening cooling device and a board discharging conveying device, wherein the board feeding conveying device is connected to the drying transmission device, the drying transmission device is connected to the flattening cooling device, the flattening cooling device is connected to the board discharging conveying device, the drying transmission device comprises a protective frame, the protective frame has a warm air cavity, a middle fixing block is symmetrically installed on the inner wall of the middle of the warm air cavity, a plurality of middle rollers arranged at intervals in the transverse direction are arranged inside the warm air cavity, the warm air cavity is divided into two upper and lower cavities by the transversely arranged middle rollers, namely a first cavity and a second cavity. cavity and a second cavity, a ventilation gap is formed between two adjacent middle drums, the middle drum itself has a plurality of vents, and a pneumatic drying device is provided in both the first cavity and the second cavity. The pneumatic drying device rotates in the first cavity to generate a clockwise first circulating airflow, and the pneumatic drying device rotates in the second cavity to generate a counterclockwise second circulating airflow. A differential controller is also provided on the outer wall of the protective frame, and the differential controller controls the speed difference between the pneumatic drying device in the first cavity and the pneumatic drying device in the second cavity to control the flow rate difference between the upper side and the lower layer of the corrugated cardboard to utilize the pressure difference for dehumidification.

[0010] A further technical solution is that the pneumatic drying device includes a rotating air pipe and an eighth conveyor belt arranged on the outside of the rotating air pipe, a plurality of spoon-shaped fanning blades are arranged in an array on the outside of the eighth conveyor belt, the rotating air pipe is rotatably installed on the inner wall of the protective frame, the protective frame is connected to a first differential motor and a second differential motor, the first differential motor is connected to the rotating air pipe on the upper side, and the second differential motor is connected to the rotating air pipe on the lower side, and the protective frame is also provided with the differential controller for controlling the speed difference between the first differential motor and the second differential motor.

[0011] A further technical solution is that the flattening cooling device includes a cold air fixing frame inside, a heater is fixedly installed inside the cold air fixing frame, a push plate is fixedly connected to the output end of the heater, and a cold air side end block is symmetrically connected to the side end of the push plate, a plurality of fourth rotating shafts are rotatably installed on the inner surface of the cold air side end block, a fifth conveyor belt is rotatably installed on the upper surface of the fourth rotating shaft, a lower conveyor plate is provided below the fifth conveyor belt, and the lower conveyor plate is located on the right side of the middle fixed block.

[0012] A further technical solution is that the plate feeding conveying device includes a left fixed frame and a right fixed frame, a first rotating shaft is rotatably installed between the left fixed frame and the right fixed frame, the end of the first rotating shaft penetrates the right fixed frame and is fixedly connected with a first rotating sleeve, the outer end surface of the first rotating sleeve is fixedly connected with a driving motor, a plurality of driving rods are arranged in an array on the right side of the first rotating shaft, the outer end of the driving rod is fixedly connected with a side end fixing plate, the driving rod provided at the right end is rotatably installed with a first conveyor belt on the surface of the first rotating shaft, and a conveying roller is provided on the surface of the first rotating shaft.

[0013] A further technical solution is that the left side fixing frame and the right side fixing frame are fixedly connected with a first oblique fixed plate at the right end, a plurality of second rotating shafts are rotatably installed between the first oblique fixed plates, a second rotating roller is rotatably installed on the surface of the second rotating shaft, an inner fixing plate and an outer fixing plate are fixedly installed on the right end surface of the second rotating shaft, a second conveyor belt is sleeved between the outer fixing plate and the inner fixing plate, and the left section of the second conveyor belt is sleeved on the surface of the driving rod.

[0014] According to a further technical solution, the middle roller of the array is provided with a sixth conveyor belt, and the sixth conveyor belt is sleeved on the second rotating shaft.

[0015] A further technical solution is that a heater is fixedly installed on the outer surface of the protective frame, a first exhaust groove is fixedly connected to the right output end of the heater, a sliding plate is fixedly connected to the lower output end of the heater, a second exhaust groove is fixedly connected to the lower end of the sliding plate, and the second exhaust groove is connected to the first exhaust groove and the inside of the warm air chamber.

[0016] A further technical solution is that the outer end of the cold air fixing frame is fixedly connected to a cold air fan, and the output end of the cold air fan is fixedly connected to an air pipe, the lower end of the air pipe is fixedly connected to a side panel, the side panel is connected to the interior of the cold air fixing frame, and a plurality of ventilation holes are arranged in an array on the opposite surfaces of the cold air fixing frame and the side panel.

[0017] A further technical solution is that a conveying trough plate is fixedly installed above the symmetrically arranged middle fixed block, a conveying inner trough is provided between the conveying trough plate and the middle fixed block, an outer guide plate is fixedly installed on the left side of the protection frame, and a support frame is fixedly installed on the lower surface of the board input conveying device and the board output conveying device.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention discloses a multifunctional intelligent drying device for producing corrugated cardboard, which uses a rotating drying air pipe and is provided with a differential speed controller at the outer end of the drying air pipe. This controller can enable the high pressure in the first chamber to exert a low pressure on the second chamber, thereby creating a squeezing and dehumidifying effect. This effect can accelerate the process of moisture removal from the material. Because the squeezing effect of the high-pressure area on the low-pressure area increases the exchange rate between the wet air and the drying medium (such as hot air), the evaporation rate of water is accelerated, thereby improving the drying efficiency. In addition, the rotating drying air pipe can make the drying medium more evenly distributed around the material. In combination with the differential speed control, it can ensure a more uniform temperature and humidity distribution during the drying process, reduce local over-drying or under-drying, and improve the drying quality. In addition, the dehumidification process is accelerated by precisely controlling the air pressure difference. Compared with traditional constant pressure drying, it can more efficiently utilize energy and avoid unnecessary energy consumption, thereby achieving the purpose of energy conservation and emission reduction. Moreover, compared with high-temperature and long-term drying, the rapid and uniform dehumidification reduces the quality degradation or damage of the material caused by overheating. The device is particularly suitable for heat-sensitive materials and is conducive to maintaining their original color, nutritional content, and structural integrity.

[0020] The present invention discloses a multifunctional intelligent drying device for corrugated cardboard production. This device uses a fan to cool cardboard freshly dried at high temperatures and also provides air cooling to the interior of the corrugated cardboard. After high-temperature drying, the cardboard may still contain a certain amount of residual heat. If heat is not promptly dissipated, the cardboard can easily expand or warp. Rapidly reducing the temperature of the cardboard's sides through air cooling helps the cardboard quickly return to a stable state, reducing shape deformation and maintaining good flatness and dimensional stability. Furthermore, rapid cooling shortens the waiting time between drying and the next process (such as cutting or printing), accelerating the entire production process and improving the production line's turnover rate and overall efficiency. Corrugated cardboard is made by bonding together face paper, core paper, and corrugated base paper. High-temperature drying can affect the adhesive properties of the glue. The cooling process helps stabilize the glue's bonding state, strengthens the bonding strength between the cardboard layers, and improves the bursting resistance and compressive strength of the finished product. Furthermore, compared to natural cooling, active cooling using a fan can more quickly remove heat from the cardboard, reducing energy consumption. Although the operation of the fan consumes electricity, it can generally achieve the goal of energy saving and cost reduction by shortening the production cycle and reducing the scrap rate.

[0021] The present invention discloses a multifunctional intelligent drying device for corrugated cardboard production. The device is equipped with a flattening device during cooling. After high-temperature drying, the cardboard may deform locally due to uneven water evaporation or thermal expansion and contraction. The synchronous flattening operation can immediately correct these deformations during the cardboard cooling and shaping process, ensuring that the surface of the final product is flat and smooth, meeting the requirements of high-quality packaging or printing. The uniform pressure helps further promote the tight fit of the internal structure of the cardboard, including the bonding strength between the face paper and the core paper, thereby improving the overall physical properties of the cardboard, such as edge strength, flat crushing strength, and burst resistance, making it more suitable for carrying heavy objects or undergoing complex processing. The flattening performed simultaneously with cooling can effectively control the dimensional changes of the cardboard, reduce shrinkage or expansion caused by temperature differences, and ensure that the produced cardboard has accurate and stable dimensions. This is particularly important for subsequent automated cutting, folding, and other processes, reducing material waste and improving production accuracy. The integrated flattening and cooling design can reduce production process steps, simplify the operation process, shorten the processing cycle, and thus improve the output speed and efficiency of the entire production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] The present invention will be further described below with reference to the accompanying drawings and examples.

[0024] Figure 1 This is a schematic diagram of the overall appearance structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the overall top view of the structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the overall side structure of the present invention;

[0027] Figure 4 It is a schematic diagram of the overall side sectional structure of the present invention;

[0028] Figure 5 Schematic diagram of the overall structure of the drying and conveying device 12 of the present invention;

[0029] Figure 6 Schematic diagram of the internal structure of the drying and conveying device 12 of the present invention;

[0030] Figure 7 Schematic diagram of the overall internal structure of the present invention;

[0031] Figure 8 It is a schematic diagram of the overall internal cross-sectional structure of the present invention.

[0032] Description of reference numerals:

[0033] Board feeding conveying device 11, drying and conveying device 12, flattening and cooling device 13, board discharging conveying device 14, left fixed frame 15, first rotating shaft 16, conveying roller 17, right fixed frame 18, first rotating sleeve 19, differential controller 20, drive motor 21, first conveyor belt 22, drive rod 23, side end fixing plate 24, pneumatic drying device 25, first oblique fixing plate 26, second rotating shaft 27, second rotating roller 28, outer guide plate 29, outer end fixing plate 30, inner fixing plate 31, second conveyor belt 32, protection frame 33, first exhaust slot 34, warm Fan 36, cold air fan 37, second exhaust trough 38, air delivery pipe 40, side plate 41, sliding plate 42, spoon-shaped fanning blade 43, rotating air pipe 44, inner tube cavity 45, middle roller 46, conveying trough plate 47, conveying inner trough 48, cold air fixing frame 49, pushing plate 50, fifth conveyor belt 51, fourth rotating shaft 52, lower conveying plate 53, support frame 54, warm air cavity 55, ventilation hole 56, cold air side end block 57, third conveyor belt 58, seventh conveyor belt 60, middle fixed block 61, eighth conveyor belt 63, first differential motor 64, second differential motor 65. DETAILED DESCRIPTION

[0034] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0035] In the description of the present invention, unless otherwise specified, "plurality" means two or more; terms such as "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," and "tail" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0037] As attached Figure 1 To the attached Figure 8 As shown:

[0038] A multifunctional intelligent drying device for corrugated cardboard production, comprising a board feed conveyor 11, a drying transmission device 12, a flattening cooling device 13, and a board discharge conveyor 14, wherein the board feed conveyor 11 is connected to the drying transmission device 12, the drying transmission device 12 is connected to the flattening cooling device 13, the flattening cooling device 13 is connected to the board discharge conveyor 14, the drying transmission device 12 comprises a protective frame 33, the protective frame 33 has a warm air cavity 55, the central inner wall of the warm air cavity 55 is symmetrically mounted with a central fixing block 61, a plurality of middle rollers 46 arranged laterally at intervals are arranged inside the warm air cavity 55, and the warm air cavity 55 is divided into upper and lower parts by the laterally arranged middle rollers 46. There are two cavities, namely the first cavity and the second cavity. A ventilation gap is formed between the two adjacent middle drums 46. The middle drum 46 itself has a plurality of vents. A pneumatic drying device 25 is provided in both the first cavity and the second cavity. The pneumatic drying device 25 rotates in the first cavity to generate a clockwise first circulating airflow, and the pneumatic drying device 25 rotates in the second cavity to generate a counterclockwise second circulating airflow. A differential controller 20 is also provided on the outer wall of the protective frame 33. The differential controller 20 controls the speed difference between the pneumatic drying device 25 in the first cavity and the pneumatic drying device 25 in the second cavity to control the flow rate difference between the upper side and the lower layer of the corrugated cardboard to utilize the pressure difference for dehumidification.

[0039] Refer to the attached Figure 1 To the attached Figure 8 ,

[0040] Preferably, the pneumatic drying device 25 includes a rotating air pipe 44 and an eighth conveyor belt 63 arranged on the outside of the rotating air pipe 44, and a plurality of spoon-shaped fanning blades 43 are arranged in an array on the outside of the eighth conveyor belt 63. The rotating air pipe 44 is rotatably installed on the inner wall of the protective frame 33, and the protective frame 33 is connected to a first differential motor 64 and a second differential motor 65. The first differential motor 64 is connected to the upper rotating air pipe 44, and the second differential motor 65 is connected to the lower rotating air pipe 44. The protective frame 33 is also provided with the differential controller for controlling the speed difference between the first differential motor 64 and the second differential motor 65.

[0041] Preferably, the flattening cooling device 13 includes a cold air fixing frame 49, and a heater 36 is fixedly installed inside the cold air fixing frame 49. The output end of the heater 36 is fixedly connected with a push plate 50, and the side end of the push plate 50 is symmetrically connected with a cold air side end block 57. The inner surface of the cold air side end block 57 is rotatably installed with multiple fourth rotating shafts 52, and the upper surface of the fourth rotating shaft 52 is rotatably installed with a fifth conveyor belt 51. A lower conveyor plate 53 is provided below the fifth conveyor belt 51, and the lower conveyor plate 53 is located on the right side of the middle fixed block 61.

[0042] Preferably, the plate feeding conveying device 11 includes a left side fixing frame 15 and a right side fixing frame 18, and a first rotating shaft 16 is rotatably installed between the left side fixing frame 15 and the right side fixing frame 18. The end of the first rotating shaft 16 penetrates the right side fixing frame 18 and is fixedly connected to a first rotating sleeve 19. The outer end surface of the first rotating sleeve 19 is fixedly connected to a driving motor 21. A plurality of driving rods 23 are arranged in an array on the right side of the first rotating shaft 16, and the outer end of the driving rod 23 is fixedly connected to a side end fixing plate 24. The driving rod 23 at the right end is rotatably installed with a first conveyor belt 22 on the surface of the first rotating shaft 16, and a conveying roller 17 is provided on the surface of the first rotating shaft 16.

[0043] Preferably, the right ends of the left fixing frame 15 and the right fixing frame 18 are fixedly connected with a first oblique fixing plate 26, a plurality of second rotating shafts 27 are rotatably installed between the first oblique fixing plates 26, a second rotating roller 28 is rotatably installed on the surface of the second rotating shaft 27, an inner fixing plate 31 and an outer fixing plate 30 are fixedly installed on the right end surface of the second rotating shaft 27, a second conveyor belt 32 is sleeved between the outer fixing plate 30 and the inner fixing plate 31, and the left section of the second conveyor belt 32 is sleeved on the surface of the driving rod 23.

[0044] Preferably, the middle roller 46 provided in the array is covered with a sixth conveyor belt, and the sixth conveyor belt is covered on the second rotating shaft 27 .

[0045] Preferably, a heater 36 is fixedly installed on the outer surface of the protection frame 33, and the right output end of the heater 36 is fixedly connected to a first exhaust groove 34, and the lower output end of the heater 36 is fixedly connected to a sliding plate 42, and the lower end of the sliding plate 42 is fixedly connected to a second exhaust groove 38, and the second exhaust groove 38 is connected to the first exhaust groove 34 and the inside of the warm air chamber 55.

[0046] Preferably, the outer end of the cold air fixing frame 49 is fixedly connected to an air cooler 37, and the output end of the air cooler 37 is fixedly connected to an air supply pipe 40, and the lower end of the air supply pipe 40 is fixedly connected to a side panel 41, and the side panel 41 is connected to the inside of the cold air fixing frame 49, and a plurality of ventilation holes 56 are arranged on the opposite surfaces of the cold air fixing frame 49 and the side panel 41.

[0047] Preferably, a conveying trough plate 47 is fixedly installed above the symmetrically arranged middle fixed block 61, a conveying inner trough 48 is provided between the conveying trough plate 47 and the middle fixed block 61, an outer guide plate 29 is fixedly installed on the left side of the protection frame 33, and a support frame 54 is fixedly installed on the lower surface of the board input conveying device 11 and the board output conveying device 14.

[0048] Specific use of the present invention:

[0049] When using the present invention, first install the present invention in the drying workshop, and after the installation is completed, the power supply of the present invention can be connected, and after the connection is completed, the present invention can be started. When the present invention is running, the corrugated cardboard to be dried will first be placed on the surface of the feed conveyor 11. After the corrugated cardboard is placed on the surface of the feed conveyor 11, the driving motor 21 will start the equipment control system and drive the conveying roller 17 to rotate. When the conveying roller 17 rotates, it will drive the first conveyor belt 22 to roll. When the conveying roller 17 rolls, it will drive the corrugated cardboard to roll. When the corrugated cardboard is rolled on the surface of the second rotating roller 28, the second rotating shaft 27 arranged at the outer end of the second rotating roller 28 will be driven by the second conveyor belt 32 and the outer end of the first conveyor belt 22, and make it form a rolling state. When the second rotating roller 28 rolls, it will also drive the corrugated cardboard to move into the protective frame 33. After the corrugated cardboard moves into the protective frame 33, it can be dried by the heater 36.

[0050] When the corrugated cardboard moves into the protection frame 33, the heater 36 arranged on the outside of the protection frame 33 will be started. When the heater 36 is started, it will transmit warm air to the inside of the rotating air pipe 44 through the first exhaust slot 34 and the second exhaust slot 38, and the first differential motor 64 and the second differential motor 65 provided at the outer end of the rotating air pipe 44 will drive the rotating air pipe 44 provided at both ends to rotate to promote rapid heat exchange, so that cold air quickly enters from the rear and circulates the hot air through the spoon-shaped fan blades 43, and the differential controller 20 provided at the outer end of the first differential motor 64 and the second differential motor 65 will control the speed difference between the first exhaust slot 34 and the second exhaust slot 38 and make the first cavity and the second cavity inside The air pressure forms a difference value, and when the first exhaust groove 34 rotates at high speed, high speed high pressure is formed, and the second exhaust groove 38 rotates at low speed, low speed negative pressure is formed, and the first cavity begins to form an extrusion effect on the second cavity. When the extrusion effect is formed, it begins to squeeze the surface of the corrugated paper. The pressure difference air will pass through the pores of the corrugated paperboard and begin to form a dehumidifying effect on the paperboard. When the third conveyor belt 58 moves, it will drive the middle roller 46 to roll, and when the middle roller 46 rolls, it will drive the corrugated paperboard to move forward. The corrugated paperboard moving forward will be affected by the warm air blown by the pneumatic drying device 25 when it rotates, and the upper and lower surfaces of the corrugated paperboard can be dried. After drying, the corrugated paperboard will be conveyed to the inside of the flattening cooling device 13.

[0051] When the corrugated cardboard moves to the inside of the board discharge conveying device 14, the lower conveying plate 53 arranged at the outer end will pass through the seventh conveyor belt 60 and drive the middle roller 46 to move, and when the middle roller 46 moves, it will drive the lower conveying plate 53 to rotate, and when the lower conveying plate 53 rotates, the warm air machine 36 arranged on the inner side of the outer guide plate 29 will push the pushing plate 50 to descend and make the fifth conveyor belt 51 press the surface of the corrugated cardboard, and when the pressing is completed, the cold air machine 37 arranged on the side of the cold air fixing frame 49 will blow air to the side plate 41, and the blown cold air will pass through the side of the corrugated board to blow the inside of the corrugated board to cool it down and dry it quickly, and when the drying is completed, it can be discharged to the outside through the board discharge conveying device 14 to form an assembly line transportation.

[0052] The present invention discloses a multifunctional intelligent drying device for corrugated cardboard production, which uses a rotating drying air duct. This design ensures that hot air or steam is evenly distributed across the entire cardboard surface, reducing local overheating or insufficient drying and improving overall drying efficiency. This allows the cardboard to reach the desired dryness in a shorter time, accelerating production time. Furthermore, the rotating drying air duct can continuously change position, ensuring that every part of the cardboard receives direct heat, avoiding uneven drying caused by a fixed heat source, thereby ensuring the flatness and overall quality of the cardboard. Furthermore, the uniform and efficient drying process reduces unnecessary energy waste, saving energy consumption to a certain extent compared to non-uniform drying methods, and complying with the environmental protection concept of energy conservation and emission reduction. Furthermore, due to the even distribution of hot air, the moisture evaporation rate of each part of the cardboard is more consistent, effectively reducing the risk of cardboard deformation, such as bending or waving, caused by local rapid drying, and facilitating the maintenance of the cardboard's geometric dimensional stability.

[0053] The present invention discloses a multifunctional intelligent drying device for corrugated cardboard production. This device uses a fan to cool cardboard freshly dried at high temperatures and also provides air cooling to the interior of the corrugated cardboard. After high-temperature drying, the cardboard may still contain a certain amount of residual heat. If heat is not promptly dissipated, the cardboard can easily expand or warp. Rapidly reducing the temperature of the cardboard's sides through air cooling helps the cardboard quickly return to a stable state, reducing shape deformation and maintaining good flatness and dimensional stability. Furthermore, rapid cooling shortens the waiting time between drying and the next process (such as cutting or printing), accelerating the entire production process and improving the production line's turnover rate and overall efficiency. Corrugated cardboard is made by bonding together face paper, core paper, and corrugated base paper. High-temperature drying can affect the adhesive properties of the glue. The cooling process helps stabilize the glue's bonding state, strengthens the bonding strength between the cardboard layers, and improves the bursting resistance and compressive strength of the finished product. Furthermore, compared to natural cooling, active cooling using a fan can more quickly remove heat from the cardboard, reducing energy consumption. Although the operation of the fan consumes electricity, it can generally achieve the goal of energy saving and cost reduction by shortening the production cycle and reducing the scrap rate.

[0054] The present invention discloses a multifunctional intelligent drying device for corrugated cardboard production. The device is equipped with a flattening device during cooling. After high-temperature drying, the cardboard may deform locally due to uneven water evaporation or thermal expansion and contraction. The synchronous flattening operation can immediately correct these deformations during the cardboard cooling and shaping process, ensuring that the surface of the final product is flat and smooth, meeting the requirements of high-quality packaging or printing. The uniform pressure helps further promote the tight fit of the internal structure of the cardboard, including the bonding strength between the face paper and the core paper, thereby improving the overall physical properties of the cardboard, such as edge strength, flat crushing strength, and burst resistance, making it more suitable for carrying heavy objects or undergoing complex processing. The flattening performed simultaneously with cooling can effectively control the dimensional changes of the cardboard, reduce shrinkage or expansion caused by temperature differences, and ensure that the produced cardboard has accurate and stable dimensions. This is particularly important for subsequent automated cutting, folding, and other processes, reducing material waste and improving production accuracy. The integrated flattening and cooling design can reduce production process steps, simplify the operation process, shorten the processing cycle, and thus improve the output speed and efficiency of the entire production line.

[0055] The embodiments of the present invention are presented for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as suited for specific applications.

Claims

1. A multifunctional intelligent drying device for corrugated cardboard production, characterized by: The board feeding conveyor device comprises a drying and conveying device, a flattening and cooling device and a board discharging conveyor device, wherein the board feeding conveyor device is connected to the drying and conveying device, the drying and conveying device is connected to the flattening and cooling device, the flattening and cooling device is connected to the board discharging conveyor device, the drying and conveying device comprises a protective frame, the protective frame has a warm air cavity, a middle fixing block is symmetrically installed on the inner wall of the middle of the warm air cavity, a plurality of middle rollers arranged at intervals in the horizontal direction are arranged inside the warm air cavity, the warm air cavity is divided into two cavities, the first cavity and the second cavity, respectively, and the two adjacent cavities are connected. A ventilation gap is formed between the middle rollers, and the middle roller itself has a plurality of ventilation holes. A pneumatic drying device is provided in both the first cavity and the second cavity. The pneumatic drying device rotates in the first cavity to generate a first clockwise circulating airflow, and the pneumatic drying device rotates in the second cavity to generate a second counterclockwise circulating airflow. A differential controller is also provided on the outer wall of the protection frame. The differential controller controls the speed difference between the pneumatic drying device in the first cavity and the pneumatic drying device in the second cavity, so as to control the flow rate difference between the upper side and the lower layer of the corrugated cardboard and utilize the pressure difference for dehumidification.

2. The multifunctional intelligent drying device for corrugated cardboard production according to claim 1, characterized in that: The pneumatic drying device includes a rotating air pipe and an eighth conveyor belt arranged on the outside of the rotating air pipe. A plurality of spoon-shaped fanning blades are arranged in an array on the outside of the eighth conveyor belt. The rotating air pipe is rotatably installed on the inner wall of the protective frame. The protective frame is connected to a first differential motor and a second differential motor. The first differential motor is connected to the rotating air pipe on the upper side, and the second differential motor is connected to the rotating air pipe on the lower side. The protective frame is also provided with the differential controller for controlling the speed difference between the first differential motor and the second differential motor.

3. The multifunctional intelligent drying device for corrugated cardboard production according to claim 1, characterized in that: The flattening cooling device includes a cold air fixing frame inside, a heater is fixedly installed inside the cold air fixing frame, a push plate is fixedly connected to the output end of the heater, and a cold air side end block is symmetrically connected to the side end of the push plate. A plurality of fourth rotating shafts are rotatably installed on the inner surface of the cold air side end block, and a fifth conveyor belt is rotatably installed on the upper surface of the fourth rotating shaft. A lower conveyor plate is provided below the fifth conveyor belt, and the lower conveyor plate is located on the right side of the middle fixed block.

4. The multifunctional intelligent drying device for corrugated cardboard production according to claim 1, characterized in that: The plate feeding conveying device includes a left fixed frame and a right fixed frame, a first rotating shaft is rotatably installed between the left fixed frame and the right fixed frame, the end of the first rotating shaft penetrates the right fixed frame and is fixedly connected with a first rotating sleeve, the outer end surface of the first rotating sleeve is fixedly connected with a driving motor, a plurality of driving rods are arranged in an array on the right side of the first rotating shaft, the outer end of the driving rod is fixedly connected with a side end fixing plate, the driving rod provided at the right end is rotatably installed with a first conveyor belt on the surface of the first rotating shaft, and a conveying roller is provided on the surface of the first rotating shaft.

5. The multifunctional intelligent drying device for corrugated cardboard production according to claim 4, characterized in that: The left and right fixed frames are fixedly connected with a first oblique fixed plate at their right ends, a plurality of second rotating shafts are rotatably mounted between the first oblique fixed plates, a second rotating roller is rotatably mounted on the surface of the second rotating shaft, an inner fixed plate and an outer fixed plate are fixedly mounted on the right end surface of the second rotating shaft, a second conveyor belt is sleeved between the outer fixed plate and the inner fixed plate, and a left section of the second conveyor belt is sleeved on the surface of the driving rod.

6. The multifunctional intelligent drying device for corrugated cardboard production according to claim 5, characterized in that: The middle roller of the array is provided with a sixth conveyor belt, and the sixth conveyor belt is sleeved on the second rotating shaft.

7. The multifunctional intelligent drying device for corrugated cardboard production according to claim 2, characterized in that: A heater is fixedly installed on the outer surface of the protective frame, and a first exhaust groove is fixedly connected to the right output end of the heater, a sliding plate is fixedly connected to the lower output end of the heater, and a second exhaust groove is fixedly connected to the lower end of the sliding plate, and the second exhaust groove is connected to the first exhaust groove and the inside of the warm air chamber.

8. The multifunctional intelligent drying device for corrugated cardboard production according to claim 3, characterized in that: The outer end of the cold air fixing frame is fixedly connected to a cold air fan, and the output end of the cold air fan is fixedly connected to an air supply pipe, the lower end of the air supply pipe is fixedly connected to a side panel, the side panel is connected to the inside of the cold air fixing frame, and the cold air fixing frame and the side panel facing surfaces are arrayed with multiple ventilation holes.

9. The multifunctional intelligent drying device for corrugated cardboard production according to claim 8, characterized in that: A conveying trough plate is fixedly installed above the symmetrically arranged middle fixed block, a conveying inner trough is provided between the conveying trough plate and the middle fixed block, an outer guide plate is fixedly installed on the left side of the protection frame, and a support frame is fixedly installed on the lower surface of the board input conveying device and the board output conveying device.

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