Paper mounting machine with positioning detection function for paperboard production

Abstract

The invention discloses a paper mounting machine with a positioning detection function for paperboard production, and relates to the technical field of paper mounting machines, a conveying device, a gluing machine and a pressing machine are arranged in sequence, a positioning device and a deviation rectifying device are connected with the conveying device in a fastened mode, and the positioning device drives the deviation rectifying device to conduct differential paper feeding. The conveying device is used for conveying surface paper and bottom paper, the offset of the surface paper is detected through the positioning device, then differential conveying is conducted on the two sides of the surface paper through the deviation rectifying device, automatic deviation rectifying is conducted, after the conveyed bottom paper enters the gluing machine, automatic gluing is conducted, and the glued bottom paper and the deviation-rectified surface paper are automatically pressed through the pressing machine. And the pressing machine adopts a roller type structure, so that the pressing continuity is ensured.

Description

Technical Field

[0001] This invention relates to the field of paper mounting machine technology, specifically a paper mounting machine for cardboard production equipped with positioning detection. Background Technology

[0002] As an important tool in product manufacturing, a paper laminating machine is generally used to laminate two layers of paper together. It includes two paper feeders, an adhesive coating structure, and a pressing mechanism.

[0003] When laminating cardboard, two paper feeders are used to transport the face paper and the back paper, respectively. The back paper can be corrugated paper. However, because the face paper is relatively light and has little friction with the paper feeders, it is easy for the face paper to shift. If positioning monitoring is not performed, it can easily affect the subsequent lamination quality with the back paper.

[0004] In addition, since the laminating process is mostly automated, it is difficult to manually intervene and cannot adjust the misaligned paper in real time. Summary of the Invention

[0005] The purpose of this invention is to provide a paper mounting machine for cardboard production with positioning detection, so as to solve the problems mentioned in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: The paper mounting machine includes a conveying device, a positioning device, a correction device, a glue applicator, and a pressing machine. The conveying device, the glue applicator, and the pressing machine are arranged in sequence. The positioning device and the correction device are respectively fixedly connected to the conveying device. The positioning device drives the correction device to feed paper at a differential speed.

[0007] The conveying device is used to transport the face paper and the back paper. The positioning device detects the offset of the face paper, and the correction device performs differential conveying of the two sides of the face paper to achieve automatic correction. After the conveyed back paper enters the glue coater, it is automatically glued. The glued back paper and the corrected face paper are automatically pressed together by the presser. The presser adopts a roller structure to ensure the continuity of pressing.

[0008] Furthermore, the conveying device includes a paper feeder and a plate feeder, which are fastened together. The paper feeder is equipped with a positioning device, which includes a drive assembly. The drive assembly includes a pressure roller, and the pressure roller and the correction device are connected by a drive. The correction device is fixedly connected to the paper feeder. The correction device includes a transmission disc, a diameter expansion assembly, a support plate, and a guide plate. The support plate and the guide plate are fixedly connected to the paper feeder respectively. The support plate and the guide plate are located on both sides of the paper feeder's paper feeding stroke. The diameter expansion assembly is movably connected to the support plate and the guide plate respectively. The diameter expansion assembly is located at the end of the paper feeder's paper feeding stroke.

[0009] The paper feeder is used to transport the face paper, and the plate feeder is used to transport the bottom paper, which can be corrugated paper or cardboard. The plate feeder is installed via the paper feeder, and the positioning device is automatically installed simultaneously to facilitate the positioning detection of the face paper. By setting pressure rollers, when the face paper deviates, the correction device is driven to automatically compensate for the deviation. The overall length of the paper feeder is defined as the paper feeding stroke. Support plates and guide plates are set on both sides of the paper feeding stroke to support the pressure rollers at both ends. An expansion component is set at the end of the pressure roller closest to the guide plate. When the face paper deviates, the expansion component automatically expands the diameter. When the angular velocity of the pressure rollers is the same, one end of the pressure roller contacts the face paper through the expansion component, which increases the rotation radius. With the same angular velocity, the linear velocity of the conveyor is greater, improving the conveying efficiency. Through differential conveying, the face paper at both ends of the pressure roller is kept accurate within the conveying stroke.

[0010] Furthermore, the drive assembly also includes a drive motor, the output end of which is fastened to the pressure roller. A fixed rotation groove is provided on the support plate, a ball joint is provided on the side of the pressure roller near the support plate, and a sliding groove is provided on the guide plate. One end of the pressure roller is rotatably connected to the fixed rotation groove through the ball joint, and the other end of the pressure roller is movably connected to the sliding groove, which is arranged vertically.

[0011] The pressure roller is driven by a drive motor to rotate, assisting the paper feeder in conveying the face paper to the gluing station and laminating the back paper. One end of the pressure roller is equipped with a ball joint, which is connected to the fixed rotation groove on the support plate, thereby providing rotational support for one end of the pressure roller. The other end of the pressure roller is connected to the drive motor for torque input. By setting a sliding groove, when the diameter expansion component expands the diameter, one end of the pressure roller rotates in the fixed rotation groove through the ball joint, while the other end slides in the sliding groove, which facilitates adjustment of the conveying radius and thus allows for differential movement.

[0012] Furthermore, the correction device also includes a transmission disc, which is fastened to the end of the pressure roller near the guide plate. The diameter expansion assembly includes a guide ring and several diameter expansion plates. The guide ring is fastened to the transmission disc, which is provided with several fixed shafts. The diameter expansion plates are provided with through holes, and one end of the fixed shaft passes through the through hole on the diameter expansion plate. The diameter expansion plate and the fixed shaft are rotatably connected. In the initial state: the outer circular surfaces of several expansion plates are combined to form a complete circle.

[0013] The drive disc is mounted via pressure rollers, and the drive disc has through holes through which one end of the pressure roller passes to facilitate torque input to the drive motor. Several fixed shafts are set on the drive disc, serving as the rotation center of the expanding plates. Initially, the outer surfaces of the expanding plates form a complete circle. When the paper feeding deviates, the expanding plates are driven to rotate outwards, causing one end of the pressure roller to rise along the chute. This increases the radius of rotation on that side. With the same angular velocity, the linear velocity of the paper moving forward through friction increases. Differential feeding on both sides of the pressure rollers aligns the front ends of the paper, improving feeding accuracy.

[0014] Furthermore, the expansion assembly also includes several expansion cylinders. The cylinder body of the expansion cylinder is rotatably connected to the fixed shaft. The output end of the expansion cylinder is provided with a transmission pin. The guide ring is provided with several guide grooves. The expansion plate is provided with an expansion groove. The transmission pin passes through the expansion groove and the guide groove in sequence. The transmission pin is slidably connected to the expansion groove and the guide groove respectively. Adjacent expansion plates are slidably connected.

[0015] The expansion cylinder serves as a power source to drive the expansion plate to rotate. The cylinder body and the fixed shaft rotate, and a transmission pin is installed at the output end. One end of the transmission pin passes through the guide groove and is inserted into the expansion groove. When the expansion cylinder outputs displacement, the end and the fixed shaft rotate. The output displacement, under the action of the guide groove and the expansion groove, pushes the expansion plate to rotate outward, thereby increasing the length from the far end of the expansion plate to the axis of the pressure roller, thus increasing the relative radius of rotation and the single linear speed. This adjusts the conveying linear speed on both sides of the face paper, thereby enabling the face paper to automatically correct and align, and improving the conveying accuracy.

[0016] As an optimization, the inner side of the expansion plate is provided with an arc surface; During diameter expansion: the curved surface and the face paper come into contact. By setting the curved surface, the curved surface contacts the face paper at different positions depending on the size of the diameter expansion, thus improving the smoothness of the transition.

[0017] As an optimization, a limiting plate is provided on one side of the drive motor, and the limiting plate and the slide groove are slidably connected. By setting the limiting plate, the drive motor is installed, and at the same time, the limiting plate is guided and limited by the slide groove to prevent the torque output of the drive motor from being affected during diameter expansion.

[0018] Furthermore, the positioning device also includes a detection component, which includes a surface light source and a mounting plate. The surface light source and the mounting plate are respectively fixedly connected to the paper feeder. The mounting plate is provided with a photosensitive layer, and the two ends of the photosensitive layer are respectively provided with electrode plates. The photosensitive layer forms a detection circuit through the two electrode plates and the detection power supply. The expansion cylinder is electrically connected to the detection circuit.

[0019] By setting a surface light source to emit parallel light, when the light shines on the photosensitive layer, it excites electron-hole pairs, which participate in conduction, making the circuit composed of the two plates and the detection power supply conductive. The stronger the light, the stronger the current in the detection circuit. Since the surface light source and the photosensitive layer are fixed and located on the upper and lower sides of the face paper respectively, and the face paper is opaque, it will block part of the light path during normal transport. The more light path is blocked, the greater the face paper offset. The magnitude of the current in the detection circuit is used as a control signal to drive the expansion cylinder to perform differential compensation. The smaller the current in the detection circuit, the greater the extension of the expansion cylinder.

[0020] As an optimization, the middle surface of the photosensitive layer, the middle surface of the surface light source, and one side edge of the paper feeder are aligned. The middle surface of the photosensitive layer and the surface light source along the paper feeder's feeding direction are aligned with one side of the paper feed surface, so that during normal light output, half of the light from the surface light source illuminates the photosensitive layer, facilitating deviation correction detection.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: An expansion component is provided at one end of the pressure roller near the guide plate. When the face paper deviates, the expansion component automatically expands the diameter. With the pressure rollers traveling at the same angular velocity, one end of the pressure roller contacts the face paper through the expansion component, increasing the rotation radius. With the same angular velocity, the linear velocity of the conveying is greater, improving conveying efficiency. Differential conveying ensures the face paper at both ends of the pressure roller maintains accuracy within the conveying stroke. Initially, the outer surfaces of several expansion plates form a complete circle. When the face paper conveying deviates, the expansion plates are driven to rotate outwards, thereby increasing the pressure roller's diameter. One end rises along the chute, increasing the radius of rotation on that side. With the same angular velocity, the linear velocity of the paper forward driven by friction increases. Intelligent compensation is achieved through differential conveying on both sides of the pressure roller, aligning the front end of the paper and improving conveying accuracy. When the expansion cylinder outputs displacement, the end and fixed shaft rotate. The output displacement, under the action of the guide groove and expansion groove, pushes the expansion plate to rotate outward, increasing the length from the far end of the expansion plate to the axis of the pressure roller. This increases the relative radius of rotation and the single linear velocity, adjusting the conveying linear velocity on both sides of the paper, thereby automatically correcting and aligning the paper and improving conveying accuracy. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the arrangement of the plate feeder and the glue applicator of the present invention; Figure 3 for Figure 1 A magnified view of a portion of the view; Figure 4 This is a schematic diagram of the transmission of the pressure roller and the diameter expansion assembly of the present invention; Figure 5 for Figure 1 A partial zoom-in view (B) of the view; Figure 6 This is a schematic diagram of the diameter expansion component structure of the present invention; Figure 7 for Figure 6 A partial C-zoom view of the view; Figure 8 This is a schematic diagram of the expansion plate structure of the present invention; Figure 9 for Figure 1 A partial D-scale magnified view of the view.

[0023] In the diagram: 1. Conveying device; 11. Paper feeder; 12. Plate feeder; 2. Positioning device; 21. Detection component; 211. Surface light source; 212. Mounting plate; 213. Photosensitive layer; 214. Electrode plate; 22. Drive component; 221. Limiting plate; 222. Drive motor; 223. Pressure roller; 224. Ball joint; 3. Correction device; 31. Transmission disc; 32. Expansion component; 321. Guide ring; 3211. Guide groove; 322. Fixed shaft; 323. Expansion plate; 3231. Expansion groove; 3232. Arc surface; 324. Expansion cylinder; 325. Transmission pin; 33. Support plate; 331. Fixed-rotation groove; 34. Guide plate; 341. Slide groove; 4. Glue applicator; 5. Pressing machine. Detailed Implementation

[0024] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example: Figures 1-9 As shown, the present invention provides a technical solution for a paper mounting machine for paperboard production with positioning detection.

[0026] The paper mounting machine includes a conveying device 1, a positioning device 2, a correction device 3, a glue applicator 4, and a pressing machine 5. The conveying device 1, the glue applicator 4, and the pressing machine 5 are arranged in sequence. The positioning device 2 and the correction device 3 are respectively fastened to the conveying device 1. The positioning device 2 drives the correction device 3 to feed paper at a differential speed.

[0027] The conveying device 1 is used to convey the face paper and the back paper. The positioning device 2 detects the offset of the face paper, and the correction device 3 performs differential conveying on both sides of the face paper to achieve automatic correction. After the conveyed back paper enters the glue applicator 4, it is automatically glued. The glued back paper and the corrected face paper are automatically pressed together by the press 5. The press 5 adopts a roller structure to ensure the continuity of pressing.

[0028] Furthermore, the conveying device 1 includes a paper feeder 11 and a plate feeder 12, which are fastened together. The paper feeder 11 is equipped with a positioning device 2, which includes a drive assembly 22. The drive assembly 22 includes a pressure roller 223, which is connected to the correction device 3 via a transmission. The correction device 3 is fastened to the paper feeder 11. The correction device 3 includes a transmission disc 31, a diameter expansion component 32, a support plate 33, and a guide plate 34. The support plate 33 and the guide plate 34 are fastened to the paper feeder 11 respectively. The support plate 33 and the guide plate 34 are located on both sides of the paper feeding stroke of the paper feeder 11. The diameter expansion component 32 is movably connected to the support plate 33 and the guide plate 34 respectively. The diameter expansion component 32 is located at the end of the paper feeding stroke of the paper feeder 11.

[0029] Paper feeder 11 is used to convey the face paper, and plate feeder 12 is used to convey the bottom paper. The bottom paper can be corrugated paper or cardboard. The plate feeder 12 is installed through paper feeder 11, and the positioning device 2 is automatically installed at the same time to facilitate the positioning detection of the face paper. By setting pressure roller 223, when the face paper deviates, the correction device 3 is driven to automatically compensate for the deviation. The overall length of paper feeding by paper feeder 11 is defined as the paper feeding stroke. By setting support plates 33 and guide plates 34 on both sides of the paper feeding stroke, the pressure roller 223 is supported at both ends. An expansion component 32 is set at the end of pressure roller 223 near the guide plate 34. When the face paper deviates, the expansion component 32 automatically expands the diameter. When the transmission angular velocity of pressure roller 223 is the same, one end of pressure roller 223 contacts the face paper through the expansion component 32, which increases the rotation radius. Under the same angular velocity, the linear velocity of the conveying is greater, improving the conveying efficiency. Through differential conveying, the face paper at both ends of pressure roller 223 is kept accurate within the conveying stroke.

[0030] Furthermore, the drive assembly 22 also includes a drive motor 222, the output end of which is fastened to the pressure roller 223. The support plate 33 is provided with a fixed rotation groove 331, the pressure roller 223 is provided with a ball joint 224 on the side near the support plate 33, and the guide plate 34 is provided with a sliding groove 341. One end of the pressure roller 223 is rotatably connected to the fixed rotation groove 331 through the ball joint 224, and the other end of the pressure roller 223 is movably connected to the sliding groove 341, which is arranged vertically.

[0031] The pressure roller 223 is driven to rotate by the drive motor 222, which assists the paper feeder 11 in conveying the face paper to the gluing station and the back paper lamination station. One end of the pressure roller 223 is provided with a ball joint 224, which is connected to the fixed rotation groove 331 on the support plate 33, thereby providing rotational support for one end of the pressure roller 223. The other end of the pressure roller 223 is connected to the drive motor 222 for torque input. By setting the slide groove 341, when the diameter expansion component 32 expands the diameter, one end of the pressure roller 223 rotates in the fixed rotation groove 331 through the ball joint 224, and the other end slides in the slide groove 341, which facilitates the adjustment of the conveying radius and thus enables differential movement.

[0032] Furthermore, the correction device 3 also includes a transmission disc 31, which is fastened to the end of the pressure roller 223 near the guide plate 34. The diameter expansion assembly 32 includes a guide ring 321 and several diameter expansion plates 323. The guide ring 321 is fastened to the transmission disc 31. Several fixed shafts 322 are provided on the transmission disc 31. Through holes are provided on the diameter expansion plates 323. One end of the fixed shaft 322 passes through the through hole on the diameter expansion plate 323. The diameter expansion plate 323 and the fixed shaft 322 are rotatably connected. In the initial state: the outer circular surfaces of several expansion plates 323 are combined to form a complete circle.

[0033] The transmission disk 31 is mounted via a pressure roller 223. A through hole is provided on the transmission disk 31, through which one end of the pressure roller 223 passes, facilitating torque input to the drive motor 222. Several fixed shafts 322 are provided on the transmission disk 31, serving as the rotation center of the expanding plate 323. Initially, the outer surfaces of the expanding plates 323 form a complete circle. When the paper feeding deviates, the expanding plates 323 are driven to rotate outwards, causing one end of the pressure roller 223 to rise along the chute 341. This increases the radius of rotation on this side. With the same angular velocity, the linear velocity of the paper moving forward through friction increases. Differential feeding on both sides of the pressure roller 223 aligns the front ends of the paper, improving feeding accuracy.

[0034] Furthermore, the expansion assembly 32 also includes several expansion cylinders 324. The cylinder body of the expansion cylinder 324 is rotatably connected to the fixed shaft 322. The output end of the expansion cylinder 324 is provided with a transmission pin 325. The guide ring 321 is provided with several guide grooves 3211. The expansion plate 323 is provided with an expansion groove 3231. The transmission pin 325 passes through the expansion groove 3231 and the guide groove 3211 in sequence. The transmission pin 325 is slidably connected to the expansion groove 3231 and the guide groove 3211 respectively. Adjacent expansion plates 323 are slidably connected.

[0035] The expansion cylinder 324 serves as a power source to drive the expansion plate 323 to rotate. The cylinder body and the fixed shaft 322 rotate, and a transmission pin 325 is provided at the output end. One end of the transmission pin 325 passes through the guide groove 3211 and is inserted into the expansion groove 3231. When the expansion cylinder 324 outputs displacement, the end and the fixed shaft 322 rotate. Under the action of the guide groove 3211 and the expansion groove 3231, the output displacement pushes the expansion plate 323 to rotate outward, thereby increasing the length from the far end of the expansion plate 323 to the axis of the pressure roller 223. This increases the relative radius of rotation and the single linear speed, adjusting the conveying linear speed on both sides of the face paper, thereby enabling the face paper to automatically correct and align, and improving the conveying accuracy.

[0036] As an optimization, the inner side of the expansion plate 323 is provided with an arc surface 3232; During diameter expansion: the curved surface 3232 contacts the face paper. By setting the curved surface 3232, the curved surface 3232 contacts the face paper at different positions depending on the diameter expansion size. The smoothness of the transition is improved through the curved surface contact.

[0037] As an optimization, a limiting plate 221 is provided on one side of the drive motor 222, and the limiting plate 221 is slidably connected to the slide groove 341. By setting the limiting plate 221, the drive motor 222 is installed. At the same time, the slide groove 341 guides and limits the limiting plate 221 to prevent the torque output of the drive motor 222 from being affected when the diameter is expanded.

[0038] Furthermore, the positioning device 2 also includes a detection component 21, which includes a surface light source 211 and a mounting plate 212. The surface light source 211 and the mounting plate 212 are respectively fastened to the paper feeder 11. The mounting plate 212 is provided with a photosensitive layer 213. The photosensitive layer 213 is provided with electrode plates 214 at both ends. The photosensitive layer 213 forms a detection circuit through the two electrode plates 214 and the detection power supply. The expansion cylinder 324 is electrically connected to the detection circuit.

[0039] By setting the surface light source 211 to emit parallel light, when the light shines on the photosensitive layer 213, it excites electron-hole pairs to participate in conduction, making the circuit composed of the two plates 214 and the detection power supply conduct. The stronger the light, the stronger the current in the detection circuit. Since the surface light source 211 and the photosensitive layer 213 are fixed and located on the upper and lower sides of the face paper respectively, and the face paper is opaque, it will block part of the light path during normal transport. The more light path is blocked, the greater the face paper offset. The magnitude of the current in the detection circuit is used as a control signal to drive the expansion cylinder 324 to perform differential speed compensation. The smaller the current in the detection circuit, the greater the extension of the expansion cylinder 324.

[0040] As an optimization, the middle surface of the photosensitive layer 213, the middle surface of the surface light source 211, and one side edge of the paper feeder 11 in the paper feeding direction are aligned. The middle surface of the photosensitive layer 213 and the surface light source 211 along the paper feeding direction of the paper feeder 11 are aligned with one side of the paper feeding surface, so that during normal light output, half of the light from the surface light source 211 illuminates the photosensitive layer 213, which facilitates deviation correction detection.

[0041] The working principle of this invention: An expansion component 32 is installed at one end of the pressure roller 223 near the guide plate 34. When the face paper deviates, the expansion component 32 automatically expands the diameter. With the pressure roller 223's transmission angular velocity consistent, one end of the pressure roller 223 contacts the face paper through the expansion component 32, increasing the rotation radius. With the same angular velocity, the linear velocity of the conveyor is greater, improving conveying efficiency. Differential conveying ensures the face paper at both ends of the pressure roller 223 maintains accuracy within the conveying stroke. Initially, the outer surfaces of several expansion plates 323 form a complete circle. When the face paper conveying deviates, the expansion plates 323 are driven to rotate outwards, thereby increasing the diameter of the pressure roller 223. As the end rises along the chute 341, the radius of rotation on this side increases. Under the same angular velocity, the linear velocity of the paper forward driven by friction increases. Through differential conveying on both sides of the pressure roller 223, the front end of the paper is aligned, improving conveying accuracy. When the expansion cylinder 324 outputs displacement, the end and the fixed shaft 322 rotate. The output displacement, under the action of the guide groove 3211 and the expansion groove 3231, pushes the expansion plate 323 to rotate outward, increasing the length from the far end of the expansion plate 323 to the axis of the pressure roller 223. This increases the relative radius of rotation and the single linear velocity, adjusting the conveying linear velocity on both sides of the paper, thereby automatically correcting and aligning the paper, improving conveying accuracy.

[0042] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laminating machine for cardboard production with positioning detection, characterized in that: The mounting machine includes a conveying device (1), a positioning device (2), a correction device (3), a glue applicator (4), and a pressing machine (5). The conveying device (1), the glue applicator (4), and the pressing machine (5) are arranged in sequence. The positioning device (2) and the correction device (3) are respectively fastened to the conveying device (1). The positioning device (2) drives the correction device (3) to feed paper at a differential speed.

2. A paper laminating machine for cardboard production with positioning detection according to claim 1, characterized in that: The conveying device (1) includes a paper feeder (11) and a plate feeder (12), which are fastened together. The paper feeder (11) is provided with a positioning device (2), which includes a drive assembly (22). The drive assembly (22) includes a pressure roller (223), which is connected to the correction device (3) in a transmission. The correction device (3) is fastened to the paper feeder (11). The correction device (3) includes a transmission disc (31), a diameter expansion component (32), a support plate (33), and a guide plate (34). The support plate (33) and the guide plate (34) are fastened to the paper feeder (11) respectively. The support plate (33) and the guide plate (34) are located on both sides of the paper feeding stroke of the paper feeder (11). The diameter expansion component (32) is movably connected to the support plate (33) and the guide plate (34) respectively. The diameter expansion component (32) is located at the end of the paper feeding stroke of the paper feeder (11).

3. A paper laminating machine for cardboard production with positioning detection according to claim 2, characterized in that: The drive assembly (22) also includes a drive motor (222), the output end of which is fastened to the pressure roller (223). The support plate (33) is provided with a fixed rotation groove (331). The pressure roller (223) is provided with a ball joint (224) on the side near the support plate (33). The guide plate (34) is provided with a sliding groove (341). One end of the pressure roller (223) is rotatably connected to the fixed rotation groove (331) through the ball joint (224), and the other end of the pressure roller (223) is movably connected to the sliding groove (341). The sliding groove (341) is arranged vertically.

4. A paper laminating machine for cardboard production with positioning detection according to claim 3, characterized in that: The correction device (3) also includes a transmission disc (31), the transmission disc (31) and the pressure roller (223) are fastened together at one end near the guide plate (34), the expansion assembly (32) includes a guide ring (321) and a plurality of expansion plates (323), the guide ring (321) and the transmission disc (31) are fastened together, the transmission disc (31) is provided with a plurality of fixed shafts (322), the expansion plates (323) are provided with through holes, one end of the fixed shaft (322) passes through the through hole on the expansion plate (323), and the expansion plate (323) and the fixed shaft (322) are rotatably connected; In the initial state: the outer circular surfaces of several of the expansion plates (323) are enclosed to form a complete circle.

5. A paper laminating machine for cardboard production with positioning detection according to claim 4, characterized in that: The expansion assembly (32) also includes several expansion cylinders (324). The cylinder body of the expansion cylinder (324) is rotatably connected to the fixed shaft (322). The output end of the expansion cylinder (324) is provided with a transmission pin (325). The guide ring (321) is provided with several guide grooves (3211). The expansion plate (323) is provided with an expansion groove (3231). The transmission pin (325) passes through the expansion groove (3231) and the guide groove (3211) in sequence. The transmission pin (325) is slidably connected to the expansion groove (3231) and the guide groove (3211) respectively. The adjacent expansion plates (323) are slidably connected.

6. A paper laminating machine for cardboard production with positioning detection according to claim 5, characterized in that: The inner side of the expansion plate (323) is provided with an arc surface (3232); During diameter expansion: the arc surface (3232) and the face paper come into contact.

7. A paper laminating machine for cardboard production with positioning detection according to claim 6, characterized in that: A limiting plate (221) is provided on one side of the drive motor (222), and the limiting plate (221) and the slide groove (341) are slidably connected.

8. A paper laminating machine for cardboard production with positioning detection according to claim 7, characterized in that: The positioning device (2) further includes a detection component (21), which includes a surface light source (211) and a mounting plate (212). The surface light source (211) and the mounting plate (212) are respectively fastened to the paper feeder (11). The mounting plate (212) is provided with a photosensitive layer (213). The photosensitive layer (213) is provided with electrode plates (214) at both ends. The photosensitive layer (213) forms a detection circuit through the two electrode plates (214) and the detection power supply. The expansion cylinder (324) is electrically connected to the detection circuit.

9. A paper laminating machine for cardboard production with positioning detection according to claim 8, characterized in that: The middle surface of the photosensitive layer (213), the middle surface of the surface light source (211), and one side edge of the paper feeder (11) in the paper feeding direction coincide.

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