Material conveying device for paper product processing and production

Abstract

The invention relates to the technical field of paper product processing, in particular to a material conveying device for paper product processing and production, which comprises a conveying belt, a centering mechanism is arranged on the left side of the top of the conveying belt, a protective frame is fixedly connected to the top of the conveying belt, and an industrial exhaust fan is arranged on the right side of the top of the protective frame. The first lower pressing plate is rotationally arranged on the left side in the protection frame and connected with the top in the protection frame through an elastic connecting piece, and the touch plates are fixedly arranged on the front face and the back face of the first lower pressing plate. According to the corrugated board edge warping processing device, the warping state of a corrugated board is detected through the edge warping processing assembly, when it is detected that a first lower pressing plate is jacked up by the two sides of the corrugated board at the same time, a high-pressure steam spray head can be triggered to locally humidify and soften the edge of the corrugated board, and then a leveling roller in the lower pressing assembly conducts rolling shaping on the softened part; fracture or damage possibly caused by forced flattening of a traditional machine is avoided, and therefore the flatness and the overall quality of output corrugated boards are improved.

Description

Technical Field

[0001] This invention relates to the field of paper product processing technology, and in particular to a material conveying device for paper product processing and production. Background Technology

[0002] Material conveying devices for product processing serve as automated bridges connecting various production processes. Their core function is to smoothly and accurately convey, redirect, or lift materials such as cardboard and cardboard. Taking typical corrugated cardboard processing as an example, since this material is made up of multiple layers of core paper and face paper, it has a relatively loose texture and its edges are easily crushed, which places special requirements on the material conveying device. Therefore, the device often uses continuously variable speed drive and adjustable spacing conveyor belts or rollers to ensure that it can provide uniform support force when conveying corrugated cardboard to prevent it from bending and deforming, and can also smoothly feed it into the subsequent printing, die-cutting, or gluing units through precise synchronous control, thereby ensuring the smooth operation of the high-speed production line and the quality of the final product.

[0003] Warping and pitting issues in corrugated cardboard arise at different stages. Warping is an inherent defect in the production stage, caused by internal stress imbalance due to differences in the moisture content of the base paper or uneven drying. Therefore, excessively warped cardboard must be removed and stacked separately on the subsequent conveyor line. Pitting, on the other hand, is usually secondary damage that occurs during the post-production storage and handling stages. It is caused by improper external forces such as forklift impacts or heavy object compression, resulting in localized crushing of the corrugated structure. After stacking, some corrugated cardboard with slight or inconspicuous warping is mixed with qualified products and stacked together, creating a large impact during the stacking process. Under its own weight, the slight warping of each cardboard sheet will squeeze against each other, amplifying the degree of warping and even causing new deformations in the originally flat cardboard. This makes it impossible for the device to effectively handle the defective corrugated cardboard when conveying it. For example, Chinese patent application CN119460817A discloses a cardboard conveying and feeding device for corrugated box production. Although this application uses a cleaning component to clean the surface of the corrugated cardboard during transportation, it still cannot detect and process defective products during the conveying process.

[0004] Therefore, how to provide a material conveying device for paper product processing is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a material conveying device for paper product processing and production, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a material conveying device for paper product processing and production, comprising a conveyor belt, an alignment mechanism disposed on the top left side of the conveyor belt, a protective frame fixedly connected to the top of the conveyor belt, and an industrial exhaust fan disposed on the top right side of the protective frame, and further comprising: The first lower pressure plate is rotatably mounted on the left side inside the protective frame, and the first lower pressure plate is connected to the top inside the protective frame through an elastic connector; The contact plate is fixedly installed on the front and back of the lower pressure plate; The limit switch is located inside the conveyor belt and above the contact plate. When the contact plate moves upward, it can contact and press the limit switch. A high-pressure steam nozzle is installed at the bottom of the protective frame. The high-pressure steam nozzle is connected to an external steam generator. When the corrugated cardboard moves on the top of the conveyor belt and squeezes the lower pressure plate, causing the contact plate on the lower pressure plate to contact the two limit switches at the same time, the high-pressure steam nozzle sprays steam to the edge of the corrugated cardboard. The second lower pressure plate is located on the lower side of the protective frame and to the right of the first lower pressure plate. A leveling roller is provided on the side of the second lower pressure plate away from the first lower pressure plate. When the corrugated cardboard passes under the leveling roller, the leveling roller can rotate on the top of the corrugated cardboard and squeeze the corrugated cardboard.

[0007] Furthermore, it also includes a warping edge treatment component, which consists of a rotating shaft, a lower pressure plate, a spring, an elastic frame, a contact plate, a limit switch, a diverter pipe, a steam inlet pipe, and a high-pressure steam nozzle. The rotating shaft is fixedly connected to the left side inside the protective frame. The lower pressure plate is rotatably connected to the outside of the rotating shaft. The spring is fixedly connected to the top left side of the lower pressure plate. The elastic frame is fixedly connected to the top right side of the lower pressure plate. The contact plate is fixedly connected to the front and back of the lower pressure plate. The limit switch is fixedly connected to the top inside the conveyor belt and is located above the contact plate. The diverter is fixedly connected to the bottom of the protective frame and is located to the upper right of the lower pressure plate. The steam inlet pipe is fixedly connected to the top of the diverter pipe. The high-pressure steam nozzle is located at the bottom of the steam inlet pipe.

[0008] Furthermore, it also includes a marking assembly, which consists of a fixed shell, a drive cylinder, a marking cylinder, a connecting pipe, a pressure spring, a roller assembly, a lifting component, a piston plate one, a return spring, a piston plate two, and a marking head; The fixed shell is fixedly connected to the right side of the lower pressure plate, the drive cylinder is fixedly connected to the top of the fixed shell, the marking cylinder is fixedly connected to the side of the fixed shell away from the lower pressure plate, the connecting pipe is fixedly connected to the top of the marking cylinder, the lifting component is slidably connected to the top inside the fixed shell, the roller assembly is fixedly connected to the bottom of the lifting component, the pressure spring is fixedly connected to the front and rear sides of the top of the roller assembly, the piston plate one is fixedly connected to the top of the lifting component, the reset spring is fixedly connected to the top inside the marking cylinder, the piston plate two is fixedly connected to the bottom of the reset spring, and the marking head is fixedly connected to the bottom of the piston plate two.

[0009] Furthermore, it also includes a pressing assembly, which consists of a second rotating shaft, a second pressing plate, a second spring, a second elastic frame, and a leveling roller; The second rotating shaft is fixedly connected to the inner side of the protective frame and located to the right of the first lower pressure plate. The second lower pressure plate is rotatably connected to the outer side of the second rotating shaft. The second spring is fixedly connected to the top of the second lower pressure plate. The second elastic frame is fixedly connected to the top right side of the second lower pressure plate. The leveling roller is rotatably connected to the right side of the second lower pressure plate.

[0010] Furthermore, it also includes a limiting component, which consists of a rotating shaft, a limiting pressure plate, and a spring. The rotating shaft three is fixedly connected to the right side inside the protective frame, the limiting pressure plate is rotatably connected to the outside of the rotating shaft three, and the spring three is fixedly connected to the top of the limiting pressure plate.

[0011] Furthermore, the tops of spring one, spring two, and spring three are all fixedly connected to the bottom of the protective frame, and a steam inlet pipe is provided on the back of the steam inlet pipe, which is connected to an external steam generator.

[0012] Furthermore, a lifting groove is provided at the bottom of the fixed shell, and the roller assembly can be raised and lowered at the bottom of the fixed shell through the lifting groove. The top of the compression spring is fixedly connected to the inner wall of the top of the fixed shell.

[0013] Furthermore, the top of the compression spring passes through the top of the fixed shell and the bottom of the drive cylinder and extends into the drive cylinder to be fixedly connected to the bottom of the piston plate. The bottom of the drive cylinder is filled with damping oil below the piston plate. The end of the connecting pipe away from the marking cylinder is fixedly connected to the outside of the drive cylinder. The inside of the drive cylinder is connected to the internal space of the marking cylinder through the connecting pipe.

[0014] Furthermore, the bottom of the piston plate 2 penetrates through the bottom of the marking cylinder and extends to the lower side of the marking cylinder, where it is fixedly connected to the top of the marking head. The top of the drive cylinder is provided with a vent hole.

[0015] Furthermore, a ventilation slot is provided on the right side of the protective frame below the industrial exhaust fan, which can draw the air at the top of the conveyor belt below the ventilation slot upwards when the industrial exhaust fan is working.

[0016] The beneficial effects of this invention are: 1. This invention uses a warping treatment component to detect the warping state of corrugated cardboard. When the lower pressure plate is simultaneously lifted by both sides of the corrugated cardboard, a high-pressure steam nozzle is triggered to locally humidify and soften the edges of the cardboard. Subsequently, the leveling roller in the lower pressure component rolls and shapes the softened area, avoiding the breakage or damage that may be caused by traditional mechanical forced flattening, thereby improving the flatness and overall quality of the output corrugated cardboard. 2. In this invention, the surface contour of the corrugated cardboard is sensed by a roller assembly. When the roller assembly passes through the local pits caused by impact and compression of the corrugated cardboard, it will descend and drive the corresponding marking head to press down, leaving a mark at the pit position, thus realizing real-time scanning and rapid positioning of surface defects during continuous material feeding. 3. The centering mechanism of this invention ensures the accurate initial position of the cardboard, preventing it from deviating and bumping during corrugated cardboard feeding. The combination of the protective frame and the industrial exhaust fan reduces the deposition of environmental dust on the corrugated cardboard and the conveyor belt, enabling a high degree of automation in the feeding process, reducing reliance on manual intervention, and lowering labor intensity. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a material conveying device for paper product processing and production proposed in this invention; Figure 2 This is a schematic diagram of the exploded structure of the protective frame of a material conveying device for paper product processing and production proposed in this invention; Figure 3 This is a schematic diagram of the contact plate structure of a material conveying device for paper product processing and production proposed in this invention; Figure 4 This is a schematic diagram of the lower pressure plate of a material conveying device for paper product processing and production proposed in this invention; Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 This is a schematic diagram of the high-pressure steam nozzle of a material conveying device for paper product processing and production proposed in this invention. Figure 7 This is a schematic diagram of the drive cylinder structure of a material conveying device for paper product processing and production proposed in this invention; Figure 8 This is a schematic diagram of the lifting component of a material conveying device for paper product processing and production proposed in this invention; Figure 9 This is a schematic diagram of the leveling roller cutting section of a material conveying device for paper product processing and production proposed in this invention; Figure 10 This is a schematic diagram of the limiting pressure plate cut-off section of a material conveying device for paper product processing and production proposed in this invention.

[0018] In the diagram: 1. Conveyor belt; 2. Alignment mechanism; 3. Protective frame; 4. Industrial exhaust fan; 5. Edge trimming assembly; 501. Rotary shaft 1; 502. Lower pressure plate 1; 503. Spring 1; 504. Elastic frame 1; 505. Contact plate; 506. Limit switch; 507. Diverter pipe; 508. Steam inlet pipe; 509. High-pressure steam nozzle; 6. Marking assembly; 601. Fixing housing; 602. Drive cylinder; 603. Marking cylinder; 604. Connecting pipe; 605. Downward pressure spring; 606. Roller assembly; 607. Lifting component; 608. Piston plate one; 609. Return spring; 610. Piston plate two; 611. Marking head; 7. Downward pressure assembly; 701. Rotating shaft two; 702. Downward pressure plate two; 703. Spring two; 704. Elastic frame two; 705. Leveling roller; 8. Limiting assembly; 801. Rotating shaft three; 802. Limiting pressure plate; 803. Spring three. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0020] Example 1 refer to Figure 1-9 This invention provides a technical solution: a material conveying device for paper product processing, including a conveyor belt 1, corrugated cardboard placed on the top left side of the conveyor belt 1, the conveyor belt 1 conveying the corrugated cardboard from left to right during operation, a centering mechanism 2 is provided on the top left side of the conveyor belt 1, the centering mechanism 2 can automatically squeeze the front and rear sides of the corrugated cardboard and fix it in a fixed position on the top of the conveyor belt 1, avoiding misalignment during subsequent conveying of the conveyor belt 1 and damage caused by the corners hitting the conveyor belt 1, a protective frame 3 is fixedly connected to the top of the conveyor belt 1, the protective frame 3 can protect the top of the corrugated cardboard and compress the space when the corrugated cardboard moves, to a certain extent preventing dust from directly accumulating on the top of the conveyor belt 1, an industrial exhaust fan 4 is provided on the top right side of the protective frame 3, the industrial exhaust fan 4 can draw the air on the top of the conveyor belt 1 and below the industrial exhaust fan 4 upwards, and also includes: The lower pressure plate 502 is rotatably mounted on the left side inside the protective frame 3. The lower pressure plate 502 is connected to the top inside the protective frame 3 through an elastic connector. The position of the lower pressure plate 502 can be maintained by the elastic connector. On the other hand, the lower pressure plate 502 can change according to the different shapes of the corrugated cardboard passing through the bottom. The touch plate 505 is fixedly installed on the front and back of the lower pressure plate 502. When the position of the lower pressure plate 502 changes, the touch plate 505 can move up and down synchronously. Limit switch 506 is located inside the conveyor belt 1 and above the contact plate 505. When the contact plate 505 moves upward, it can contact and squeeze the limit switch 506. When the limit switch 506 receives the signal generated by the squeeze of the contact plate 505, the two limit switches 506 can synchronously connect the circuit and drive the subsequent high-pressure steam nozzle 509 to spray steam. A high-pressure steam nozzle 509 is located at the bottom of the protective frame 3. The high-pressure steam nozzle 509 is connected to an external steam generator. When the corrugated cardboard moves on the top of the conveyor belt 1 and presses against the lower pressure plate 502, causing the contact plate 505 on the lower pressure plate 502 to contact the two limit switches 506 simultaneously, the high-pressure steam nozzle 509 sprays steam to the edge of the corrugated cardboard. The second pressure plate 702 is located on the lower side of the protective frame 3 and to the right of the first pressure plate 502. A leveling roller 705 is provided on the side of the second pressure plate 702 away from the first pressure plate 502. When the corrugated cardboard passes under the leveling roller 705, the leveling roller 705 can rotate on the top of the corrugated cardboard and squeeze the corrugated cardboard. It can start to press down on the edge of the steam-treated corrugated cardboard and readjust the flatness of the corrugated cardboard.

[0021] Working principle: The corrugated cardboard is placed on top of the conveyor belt 1. Then, the centering mechanism 2 compresses the front and rear sides of the cardboard, automatically centering it. The cardboard then moves along the top of the conveyor belt 1. When one side of the cardboard is tilted upwards during feeding, it compresses the bottom of the lower pressure plate 502, causing one side of the lower pressure plate 502 to rise. When both sides of the lower pressure plate 502 rise simultaneously, the contact plate 505 on the lower pressure plate 502 simultaneously contacts two limit switches 506, driving the high-pressure steam nozzle 509 to spray external steam onto the corrugated cardboard. At the edge of the cardboard, the edge of the corrugated cardboard is reheated and softened to reduce the strength of the corrugated cardboard warping. If the single trigger of the limit switch 506 by the touch plate 505 is not triggered, the high-pressure steam nozzle 509 cannot be driven to spray steam. Then the conveyor belt 1 continues to move the corrugated cardboard to the underside of the lower pressure plate 702. When passing the leveling roller 705, due to the reduced strength of the corrugated cardboard, it is not possible to effectively arch the lower pressure plate 702. The leveling roller 705 increases the counterweight of the lower pressure plate 702, which can start to squeeze the edge of the corrugated cardboard and reshape the corrugated cardboard.

[0022] Example 2 refer to Figure 1-6 Based on Embodiment 1, the present invention provides a technical solution that further includes a warping edge treatment component 5, which is composed of a rotating shaft 501, a lower pressure plate 502, a spring 503, an elastic frame 504, a contact plate 505, a limit switch 506, a diversion pipe 507, a steam inlet pipe 508, and a high-pressure steam nozzle 509.

[0023] A rotating shaft 501 is fixedly connected to the inner left side of the protective frame 3. A lower pressure plate 502 is rotatably connected to the outer side of the rotating shaft 501. A spring 503 is fixedly connected to the top left side of the lower pressure plate 502. An elastic frame 504 is fixedly connected to the top right side of the lower pressure plate 502. A contact plate 505 is fixedly connected to the front and back of the lower pressure plate 502. A limit switch 506 is fixedly connected to the top of the inner side of the conveyor belt 1 and is located above the contact plate 505. A diversion pipe 507 is fixedly connected to the bottom of the protective frame 3 and is located to the upper right of the lower pressure plate 502. A steam inlet pipe 508 is fixedly connected to the top of the diversion pipe 507. A high-pressure steam nozzle 509 is located at the bottom of the steam inlet pipe 508.

[0024] The tops of spring 1 (503), spring 2 (703), and spring 3 (803) are all fixedly connected to the bottom of the protective frame 3. A steam inlet pipe is provided on the back of the steam inlet pipe 508, and the steam inlet pipe 508 is connected to an external steam generator through the steam inlet pipe.

[0025] Example 3 refer to Figure 7-10Based on Embodiment 2, the present invention provides a technical solution that further includes a marking component 6, which is composed of a fixed shell 601, a drive cylinder 602, a marking cylinder 603, a connecting pipe 604, a pressure spring 605, a roller assembly 606, a lifting component 607, a piston plate 1 608, a reset spring 609, a piston plate 2 610, and a marking head 611.

[0026] The fixed housing 601 is fixedly connected to the right side of the lower pressure plate 502, the drive cylinder 602 is fixedly connected to the top of the fixed housing 601, the marking cylinder 603 is fixedly connected to the side of the fixed housing 601 away from the lower pressure plate 502, the connecting pipe 604 is fixedly connected to the top of the marking cylinder 603, the lifting component 607 is slidably connected to the top inside the fixed housing 601, the roller assembly 606 is fixedly connected to the bottom of the lifting component 607, the pressure spring 605 is fixedly connected to the front and rear sides of the top of the roller assembly 606, the piston plate 608 is fixedly connected to the top of the lifting component 607, the return spring 609 is fixedly connected to the top inside the marking cylinder 603, the piston plate 610 is fixedly connected to the bottom of the return spring 609, and the marking head 611 is fixedly connected to the bottom of the piston plate 610.

[0027] It also includes a pressing assembly 7, which consists of a rotating shaft 701, a pressing plate 702, a spring 703, an elastic frame 704, and a leveling roller 705.

[0028] The second rotating shaft 701 is fixedly connected to the inner side of the protective frame 3 and is located to the right of the first lower pressure plate 502. The second lower pressure plate 702 is rotatably connected to the outer side of the second rotating shaft 701. The second spring 703 is fixedly connected to the top of the second lower pressure plate 702. The second elastic frame 704 is fixedly connected to the top right side of the second lower pressure plate 702. The leveling roller 705 is rotatably connected to the right side of the second lower pressure plate 702.

[0029] It also includes a limiting component 8, which consists of a rotating shaft 801, a limiting pressure plate 802, and a spring 803.

[0030] The rotating shaft 3 801 is fixedly connected to the right side of the inner side of the protective frame 3, the limiting pressure plate 802 is rotatably connected to the outside of the rotating shaft 3 801, and the spring 3 803 is fixedly connected to the top of the limiting pressure plate 802.

[0031] The bottom of the fixed housing 601 is provided with a lifting groove, and the roller assembly 606 can be raised and lowered inside the bottom of the fixed housing 601 through the lifting groove. The top of the pressure spring 605 is fixedly connected to the top inner wall of the fixed housing 601, and the roller assembly 606 can be raised and lowered at the bottom of the fixed housing 601. The pressure spring 605 can provide downward pressure to the roller assembly 606.

[0032] The top of the compression spring 605 passes through the top of the fixed shell 601 and the bottom of the drive cylinder 602, and extends into the drive cylinder 602, where it is fixedly connected to the bottom of the piston plate 608. The bottom of the drive cylinder 602, below the piston plate 608, is filled with damping oil. The end of the connecting pipe 604 away from the marking cylinder 603 is fixedly connected to the outside of the drive cylinder 602. The interior of the drive cylinder 602 is connected to the interior space of the marking cylinder 603 via the connecting pipe 604. When the roller assembly 606 encounters a pit on the corrugated cardboard... The roller assembly 606 descends, causing the piston plate 608 to descend synchronously within the drive cylinder 602, and squeezing the damping oil inside the drive cylinder 602. This causes the damping oil inside the drive cylinder 602 to be introduced into the top of the marking cylinder 603 through the connecting pipe 604, allowing the damping oil to fill the upper side of the marking cylinder 603 and stretch the return spring 609. At the same time, the piston plate 610 descends, causing the marking head 611 to contact the top of the corrugated cardboard, thus marking the top of the corrugated cardboard.

[0033] The bottom of piston plate 610 passes through the bottom of marking cylinder 603 and extends to the lower side of marking cylinder 603, where it is fixedly connected to the top of marking head 611. A vent hole is provided at the top of drive cylinder 602.

[0034] A ventilation slot is provided on the right side of the protective frame 3 below the industrial exhaust fan 4. When the industrial exhaust fan 4 is working, it can draw the air at the top of the conveyor belt 1, which is located below the ventilation slot, upwards.

[0035] Working Principle: Secondary damage, forklift impacts, and improper external forces such as heavy object compression during the stacking and handling stages after corrugated cardboard production can cause localized crushing of the corrugated structure, resulting in large pits on the surface of the cardboard. These pits will cause the product to fail quality inspection during the conveying process. Therefore, it is necessary to inspect for these pits during the conveying process. The corrugated cardboard is placed on top of conveyor belt 1. As conveyor belt 1 operates, the corrugated cardboard passes the bottom of the lower pressure plate 502 and continues to move to the right. During this movement, the top of the corrugated cardboard contacts the roller assembly 606, causing the roller assembly 606 to rise. This creates a negative pressure under the piston plate 608 inside the drive cylinder 602, causing the piston plate 608 to draw liquid from the top of the marking cylinder 603 into the drive cylinder 602, thus triggering the return spring 609. The piston plate 610 rises within the marking cylinder 603, causing the marking head 611 to rise as well. This prevents the marking head 611 from contacting the top of intact corrugated cardboard. When encountering a hole on the top of the corrugated cardboard, the roller assembly 606 and multiple marking heads 611 can be triggered specifically for different holes. When the roller assembly 606 encounters a hole, it moves downward at the hole. As the roller assembly 606 moves downward, it drives the top piston plate 608 to descend and squeeze the damping oil in the drive cylinder 602. This causes the damping oil in the drive cylinder 602 to flow back into the marking cylinder 603, squeezing the return spring 609 and the piston plate 610. This causes the marking head 611 at the bottom of the piston plate 610 to contact the top of the corrugated cardboard, marking the top of the cardboard. After subsequent material feeding, the location of any holes can be visually observed, preventing missed detections.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A material conveying device for paper product processing and production, comprising a conveyor belt (1), characterized in that: A centering mechanism (2) is provided on the top left side of the conveyor belt (1), a protective frame (3) is fixedly connected to the top of the conveyor belt (1), and an industrial exhaust fan (4) is provided on the top right side of the protective frame (3). The conveyor belt (1) also includes: The lower pressure plate (502) is rotatably installed on the left side inside the protective frame (3), and the lower pressure plate (502) is connected to the top inside the protective frame (3) through an elastic connector; The touch plate (505) is fixedly installed on the front and back of the lower pressure plate (502); Limit switch (506) is located inside the conveyor belt (1) and above the contact plate (505). When the contact plate (505) moves upward, it can contact and squeeze the limit switch (506). A high-pressure steam nozzle (509) is installed at the bottom of the protective frame (3). The high-pressure steam nozzle (509) is connected to an external steam generator. When the corrugated cardboard moves on the top of the conveyor belt (1) and squeezes the lower pressure plate (502), causing the contact plate (505) on the lower pressure plate (502) to contact the two limit switches (506) at the same time, the high-pressure steam nozzle (509) sprays steam to the edge of the corrugated cardboard. The second lower pressure plate (702) is located on the lower side of the protective frame (3) and to the right of the first lower pressure plate (502). A leveling roller (705) is provided on the side of the second lower pressure plate (702) away from the first lower pressure plate (502). When the corrugated cardboard passes under the leveling roller (705), the leveling roller (705) can rotate on the top of the corrugated cardboard and squeeze the corrugated cardboard.

2. The material conveying device for paper product processing and production according to claim 1, characterized in that: It also includes a warping edge treatment component (5), which is composed of a rotating shaft (501), a lower pressure plate (502), a spring (503), an elastic frame (504), a contact plate (505), a limit switch (506), a diverter pipe (507), a steam inlet pipe (508), and a high-pressure steam nozzle (509); The rotating shaft (501) is fixedly connected to the left side inside the protective frame (3). The lower pressure plate (502) is rotatably connected to the outside of the rotating shaft (501). The spring (503) is fixedly connected to the top left side of the lower pressure plate (502). The elastic frame (504) is fixedly connected to the top right side of the lower pressure plate (502). The touch plate (505) is fixedly connected to the front and back of the lower pressure plate (502). The limit switch (506) is fixedly connected to the top inside the conveyor belt (1) and is located above the touch plate (505). The diversion pipe (507) is fixedly connected to the bottom of the protective frame (3) and is located to the upper right of the lower pressure plate (502). The steam inlet pipe (508) is fixedly connected to the top of the diversion pipe (507). The high-pressure steam nozzle (509) is located at the bottom of the steam inlet pipe (508).

3. The material conveying device for paper product processing and production according to claim 2, characterized in that: It also includes a marking assembly (6), which consists of a fixed shell (601), a drive cylinder (602), a marking cylinder (603), a connecting pipe (604), a pressure spring (605), a roller assembly (606), a lifting component (607), a piston plate one (608), a return spring (609), a piston plate two (610), and a marking head (611); The fixed shell (601) is fixedly connected to the right side of the lower pressure plate (502), the drive cylinder (602) is fixedly connected to the top of the fixed shell (601), the marking cylinder (603) is fixedly connected to the side of the fixed shell (601) away from the lower pressure plate (502), the connecting pipe (604) is fixedly connected to the top of the marking cylinder (603), the lifting component (607) is slidably connected to the top inside the fixed shell (601), the roller assembly (606) is fixedly connected to the bottom of the lifting component (607), the pressure spring (605) is fixedly connected to the front and rear sides of the top of the roller assembly (606), the piston plate (608) is fixedly connected to the top of the lifting component (607), the return spring (609) is fixedly connected to the top inside the marking cylinder (603), the piston plate (610) is fixedly connected to the bottom of the return spring (609), and the marking head (611) is fixedly connected to the bottom of the piston plate (610).

4. The material conveying device for paper product processing and production according to claim 3, characterized in that: It also includes a pressing assembly (7), which is composed of a second rotating shaft (701), a second pressing plate (702), a second spring (703), a second elastic frame (704), and a leveling roller (705); The second rotating shaft (701) is fixedly connected to the inner side of the protective frame (3) and located to the right of the first lower pressure plate (502). The second lower pressure plate (702) is rotatably connected to the outer side of the second rotating shaft (701). The second spring (703) is fixedly connected to the top of the second lower pressure plate (702). The second elastic frame (704) is fixedly connected to the top right side of the second lower pressure plate (702). The leveling roller (705) is rotatably connected to the right side of the second lower pressure plate (702).

5. The material conveying device for paper product processing and production according to claim 4, characterized in that: It also includes a limiting component (8), which is composed of a rotating shaft (801), a limiting pressure plate (802), and a spring (803); The rotating shaft three (801) is fixedly connected to the right side inside the protective frame (3), the limiting pressure plate (802) is rotatably connected to the outside of the rotating shaft three (801), and the spring three (803) is fixedly connected to the top of the limiting pressure plate (802).

6. A material conveying device for paper product processing and production according to claim 5, characterized in that: The tops of spring one (503), spring two (703), and spring three (803) are all fixedly connected to the bottom of the protective frame (3). A steam inlet pipe is provided on the back of the steam inlet pipe (508), and the steam inlet pipe (508) is connected to an external steam generator through the steam inlet pipe.

7. A material conveying device for paper product processing and production according to claim 6, characterized in that: The bottom of the fixed shell (601) is provided with a lifting groove, and the roller assembly (606) can be lifted and lowered at the bottom of the fixed shell (601) through the lifting groove. The top of the compression spring (605) is fixedly connected to the inner wall of the top of the fixed shell (601).

8. A material conveying device for paper product processing and production according to claim 7, characterized in that: The top of the compression spring (605) passes through the top of the fixed shell (601) and the bottom of the drive cylinder (602) and extends into the drive cylinder (602) to be fixedly connected to the bottom of the piston plate (608). The bottom of the drive cylinder (602) is filled with damping oil below the piston plate (608). The end of the connecting pipe (604) away from the marking cylinder (603) is fixedly connected to the outside of the drive cylinder (602). The inside of the drive cylinder (602) is connected to the internal space of the marking cylinder (603) through the connecting pipe (604).

9. A material conveying device for paper product processing and production according to claim 8, characterized in that: The bottom of the piston plate 2 (610) penetrates the bottom of the marking cylinder (603) and extends to the lower side of the marking cylinder (603) and is fixedly connected to the top of the marking head (611).

10. A material conveying device for paper product processing and production according to claim 9, characterized in that: The protective frame (3) has a ventilation slot on the right side below the industrial exhaust fan (4). When the industrial exhaust fan (4) is working, it can draw the air at the top of the conveyor belt (1) below the ventilation slot upward.

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