Slitting and rewinding apparatus for printed web and printed nonwoven article

Abstract

The utility model relates to a printing web's slitting rewinding device and printing non - woven fabric product. Printing web has the width of length and transverse, and has printed the pattern. Slitting rewinding device includes: unwinding module, including the unwinding roll of bearing mother roll and the unwinding drive motor of connecting unwinding roll, unwinding module unwinds the mother roll into continuous printing web, slitting module is downstream in unwinding module, and has the cutter that can cut continuous printing web into the printing web strip with more narrow width, rewinding module includes the rewinding roll of bearing printing web strip sub -roll and the rewinding drive motor of connecting rewinding roll, visual detection unit is arranged between slitting module and rewinding module, and it is configured to real -time acquisition printing web strip's image and is based on image recognition printing web strip's pattern position, control unit is connected unwinding module's unwinding drive motor and visual detection unit, and is configured to based on the printing web strip pattern position of identification dynamic adjustment unwinding drive motor speed.

Description

Technical Field

[0001] This utility model relates to the technical field of processing equipment for printed webs, and in particular to a slitting and rewinding device for printed webs and printed nonwoven fabric products. Background Technology

[0002] Traditional slitting and rewinding machines operate by controlling the tension based on the material to ensure consistent tension in the rewound nonwoven fabric roll. For example, Chinese patent application No. 202410737333.6, filed on June 7, 2024, proposes a high-speed slitting machine tension control system that can adjust the tension during winding to prevent wrinkling after slitting and rewinding caused by loosening and drifting of the film material.

[0003] In the field of web fabrication, rewinding quality control technology based on tension sensing and adjustment is relatively mature. However, this technology is mainly applicable to non-printed web fabrics. For printed web fabrics, their surfaces typically require printing various patterns, including decorative or functional patterns such as brand logos and product information. These web fabrics with printed patterns, after undergoing slitting and rewinding processes, form rolls that are used as semi-finished products in the manufacture of subsequent products, such as diapers, pull-ups, sanitary napkins, and panty liners. In this process, ensuring the consistency of pattern spacing on the rewound roll is crucial. First, the stability of pattern spacing directly affects the positioning accuracy of subsequent die-cutting and welding processes, thus affecting the precision of subsequent processing. Second, fluctuations in pattern spacing can lead to visual defects such as pattern misalignment and cutting deviations, affecting the product's appearance quality. Third, for products with functional positioning requirements (such as the corresponding position of the absorbent core), spacing deviations may affect product performance, resulting in a loss of functional integrity.

[0004] Therefore, there is a need in the industry for a solution that can ensure the consistency of pattern spacing on the rewinding rolls of printed web materials. Summary of the Invention

[0005] The present invention aims to provide a slitting and rewinding device for printed webs, which can at least solve some of the above-mentioned technical problems.

[0006] This invention also aims to provide a printed nonwoven fabric product produced by the above-mentioned slitting and rewinding device.

[0007] According to one aspect of the present invention, a slitting and rewinding apparatus for printed webs is provided, wherein the printed web has a length along the machine direction and a width transverse to the machine direction, and a pattern is printed on the surface of the printed web. The slitting and rewinding apparatus includes: an unwinding module comprising an unwinding roller carrying a master roll of the printed web and an unwinding drive motor connected to the unwinding roller, the unwinding module being capable of unwinding the master roll into a continuous printed web; and a slitting module arranged downstream of the unwinding module along the machine direction, the slitting module being capable of cutting the continuous printed web into pieces with a narrower width. A cutting tool for a printed strip; a rewinding module including a rewinding roller carrying a sub-roll formed by winding the printed strip and a rewinding drive motor connected to the rewinding roller; a vision inspection unit disposed between the slitting module and the rewinding module, the vision inspection unit being configured to acquire images of the printed strip in real time and identify the position of the pattern on the printed strip based on the images; and a control unit connected to the vision inspection unit and the unwinding drive motor of the unwinding module, and configured to dynamically adjust the speed of the unwinding drive motor based on the identified position of the pattern on the printed strip.

[0008] This solution provides a slitting and rewinding device for printed webs that achieves high-precision and stable control of the spacing between printed patterns. Through closed-loop control combining visual inspection and dynamic speed adjustment, it solves the problem of inconsistent pattern spacing that traditional tension control cannot guarantee, reducing the scrap rate caused by pattern misalignment in subsequent processing steps. Real-time visual feedback of pattern position, combined with dynamic adjustment of unwinding speed, compresses pattern spacing fluctuations to extremely low levels, achieving ±0.3 mm or even lower, providing conditions for improved positioning accuracy in subsequent die-cutting and welding. This solution is applicable to various printed webs, such as non-woven fabrics, transparent or semi-transparent films, and paper materials with embossing or ink printing. It effectively overcomes the influence of web elastic deformation on pattern spacing and can handle printed webs with highly complex patterns, such as gradient logos and small functional markings. This helps ensure precise alignment of functional areas (such as absorbent cores and leak-proof side panels) in hygiene products (diapers, sanitary napkins, etc.). The entire process, from visual inspection to speed adjustment, is completed automatically in a closed loop. The entire control process requires no machine stoppage or manual intervention, significantly improving production line efficiency. This solution adds a vision unit and a control module to the existing slitting and rewinding device without modifying the main structure, making it highly practical.

[0009] In some embodiments, the control unit is configured to: calculate the actual spacing between patterns based on the position of the pattern on the identified printed strip, compare the actual spacing with a preset spacing, and dynamically adjust the speed of the unwinding drive motor of the unwinding module based on the comparison result.

[0010] In some embodiments, the visual detection unit includes: a light source configured to illuminate a patterned area of ​​the printed strip; an industrial camera configured to acquire continuous images of the printed strip in real time; and an image processing unit connected to the industrial camera and configured to identify the position of the pattern on the printed strip based on the acquired continuous images.

[0011] In some embodiments, the optical axis of the lens of the industrial camera is perpendicular to the plane of travel of the printed fabric, and the field of view of the industrial camera covers at least the entire width of a single printed fabric strip.

[0012] In some embodiments, the industrial camera is mounted on an adjustable bracket having XYZ three-way slide rails and locking elements detachably connected to the three-way slide rails.

[0013] In some embodiments, the industrial camera is positioned above the plane of travel of the printed web, the light source illuminates the patterned area of ​​the printed web strip from below, and the industrial camera and the light source are vertically aligned.

[0014] In some embodiments, the visual detection unit has a recognition accuracy of ≤0.1 mm and a sampling frequency of ≥200 Hz.

[0015] In some embodiments, the slitting and rewinding apparatus further includes a correction module located between the unwinding module and the slitting module, the correction module being configured to identify the position of the side edge of the continuous printing web, and the control unit being configured to adjust the lateral position of the continuous printing web based on the identified position of the side edge of the continuous printing web.

[0016] In some embodiments, the slitting and rewinding apparatus further includes an edge trimming module located between the correction module and the slitting module, and configured to remove a predetermined edge amount from the continuous printing web.

[0017] According to another aspect of the present invention, a printed nonwoven fabric product is provided, which is produced using the aforementioned slitting and rewinding device for printed webs.

[0018] Other features and advantages of this invention will partly be apparent to those skilled in the art upon reading this application, and partly will be described below in conjunction with the accompanying drawings in the detailed description. Attached Figure Description

[0019] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings, wherein:

[0020] Figure 1 This is a simplified schematic diagram of a slitting and rewinding device for printed webs according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the operation of the visual inspection unit of the printing web slitting and rewinding device according to an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures

[0023] 100 - Unwinding module; 400 - Slitting module; 401 - Cutting tool; 500 - Rewinding module; 700 - Vision inspection unit; 701 - Industrial camera; 702 - Light source; 10 - Web travel plane; 20 - Roll Detailed Implementation

[0024] The schematic solutions of the technical solutions disclosed in this utility model are now described in detail with reference to the accompanying drawings. Although the drawings are provided to illustrate some embodiments of this utility model, the drawings are not necessarily drawn to the dimensions of the specific embodiments, and certain features may be enlarged, removed, or partially cut to better illustrate and explain the disclosure of this utility model. Some components in the drawings may be repositioned according to actual needs without affecting the technical effect. The phrase "in the drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0025] Certain directional terms used in the description of the accompanying drawings below, such as “inner,” “outer,” “above,” “below,” and other directional terms, will be understood to have their normal meaning and refer to those directions as normally viewed in the accompanying drawings. Unless otherwise specified, the directional terms used in this specification are generally in accordance with the conventional directions understood by those skilled in the art.

[0026] The terms “first,” “first,” “second,” “second,” and similar terms used in this utility model do not indicate any order, quantity, or importance, but are used to distinguish one component from other components.

[0027] The term "machine direction (MD)" as used in this invention refers to the longitudinal direction that is consistent with the direction of the printing web on the production line, that is, the direction of movement of the printing web from unwinding to rewinding.

[0028] The term "Cross Direction (CD)" as used in this invention refers to the direction perpendicular to the MD direction, i.e., the width direction of the printing web, which is oriented from one edge of the printing web to the other edge.

[0029] Production lines for printed webs (such as nonwoven fabrics, paper, or cardboard, as well as transparent or semi-transparent film materials) can typically be hundreds of meters long and involve a series of complex equipment and processes to ensure the production of high-quality products. An exemplary production process for printed webs might include web preparation, surface printing, and slitting and rewinding. These processes are described below.

[0030] Preparation of web

[0031] The preparation of the web is the fundamental step in the production of printing webs. Its main purpose is to transform raw materials into continuous webs with a certain width, thickness, and strength. This process can begin with the selection and pretreatment of raw materials.

[0032] Taking the preparation of fiber webs as an example, here fiber refers to a substance composed of continuous or discontinuous filaments. Fiber webs include, for example, nonwoven fabric webs, paper webs, or paperboard webs, as well as fiber-based composite materials. The fiber raw materials undergo processes such as screening, washing, bleaching, and pulping to ensure fiber quality and performance. Next, the fiber raw materials are dispersed in water to form a uniform fiber suspension, and various chemical additives, such as brighteners, fillers, and adhesives, are added as needed to improve the performance of the fiber web. Subsequently, the fiber suspension is evenly distributed onto a forming wire through a headbox, where gravity and vacuum gradually dehydrate the fibers and interweave them into a mesh structure, forming a wet fiber web. The wet fiber web is further dehydrated by mechanical pressure to increase its dryness, and then enters the drying stage. In the drying stage, the fiber web removes moisture through heat energy to achieve a certain degree of dryness. After drying, the fiber web is calendered to make the surface smoother and flatter. Then, it undergoes a coating process to impart specific functions and properties, such as smoothness, water resistance, flame retardancy, antibacterial properties, and electrical conductivity. Finally, the processed fiber web is wound into master rolls, packaged, and stored for use in subsequent processes.

[0033] Printing of web

[0034] In one exemplary embodiment, the printing production process of the web may include the following steps: unwinding the master roll, corona treatment, printing, drying, defect detection, and rewinding.

[0035] Let's take fiber web as an example again. Unwinding the master roll of the fiber auxiliary material is the starting step of the printing process. The master roll is usually stored on an unwinding stand. Driven by an unwinding motor, the master roll rotates, smoothly unwinding the fiber web and providing continuous material for subsequent printing processes. During the unwinding process, the fiber web uses unwinding rollers to maintain stable tension. The rollers automatically adjust their position through air pressure or gravity to compensate for changes in the diameter of the master roll, thereby maintaining uniform tension of the fiber web and preventing material deformation or wrinkling due to tension fluctuations.

[0036] Before entering the printing press, the surface of the fiber web typically undergoes corona treatment. Corona treatment is a surface modification technique that uses corona discharge generated by a high-voltage electric field to create a tiny oxide layer on the surface of the fiber web, thereby increasing surface energy and enhancing ink adhesion.

[0037] The fiber web is then fed into a printing press. The press can contain multiple printing units, each responsible for printing one color or pattern. The fiber web passes through these printing units sequentially. It is known that printing presses can employ techniques such as flexographic printing, offset printing, or screen printing to precisely transfer ink to the surface of the fiber web using a printing plate. After printing, the fiber web enters an oven for drying. The oven can rapidly remove solvents from the ink using hot air circulation or infrared heating, allowing the ink to cure.

[0038] To ensure printing quality, defect detection can be performed on the fiber web. The defect detector automatically scans the material surface, detecting and recording any potential flaws or defects. The defect detector can employ a vision inspection module equipped with a high-resolution camera and image processing software, capable of identifying and marking defect locations in real time for subsequent processing. The printed fiber web can be wound into a printing master roll by a winding device for use in subsequent processes. The winding device can be equipped with a tension control system and a roll diameter measuring device to ensure the neatness and stability of the roll. A winding roller can also be installed before the winding device; its function is similar to the unwinding roller, automatically adjusting its position through air pressure or gravity to ensure stable tension of the fiber web during winding.

[0039] Slitting and rewinding of printing sheets

[0040] Printing webs are full-width, with lengths reaching tens or even hundreds of meters. Such printing fiber webs need to be slit into strips of suitable width to meet the processing requirements of subsequent products, and the slit strips need to be rewound into rolls or sub-rolls. The slitting and rewinding of printing webs can be achieved using… Figure 1 The slitting and rewinding apparatus shown as an example is used to accomplish this.

[0041] As shown in the figure, the slitting and rewinding device mainly includes an unwinding module 100, a slitting module 400, a vision inspection module 700, and a rewinding module 500.

[0042] The unwinding module 100 is the starting part of the entire device, supporting and unwinding the master roll of the printing web and providing stable unwinding tension. The unwinding module 100 may include an unwinding roller and an unwinding drive motor connected to the unwinding roller. The unwinding roller, used to carry the master roll of the printing web, can be made of high-strength alloy steel and can carry master rolls with diameters, for example, 2000 mm to 2500 mm. The unwinding drive motor can be, for example, a servo motor with a power of 5.5 kW to 15 kW, to provide the necessary power to smoothly unwind the master roll into a continuous printing web. A receiving device, such as multiple receiving rollers arranged along the machine direction, may be arranged between the unwinding module 100 and the slitting module 400 to ensure that the unwound continuous printing web is fed to the slitting module 400 at the expected speed, and that tension fluctuations remain within an acceptable range throughout the process.

[0043] Although not shown in the figure, as an option, a web guiding module can be installed between the unwinding module 100 and the slitting module 400. The web guiding module, controlled by the control unit, automatically adjusts the lateral position of the continuous fiber web to prevent deviation from affecting slitting accuracy. The web guiding module can be equipped with photoelectric sensors, ultrasonic sensors, or vision sensors to detect the edge position of the continuous printing web in real time and send the position detection signal to the control unit. Once the control unit determines that the edge position of the continuous printing web deviates from the preset position, it drives a web guiding motor or web guiding cylinder to adjust the lateral position of the material. The web guiding accuracy can be within ±0.1 mm. This web guiding is dynamically adjusted to prevent the printing web from deviating, deforming, or wrinkling, ensuring subsequent slitting accuracy.

[0044] A trimming module can also be optionally installed downstream of the correction module. After correction, the continuous printing web undergoes edge trimming in the trimming module to remove waste edges and improve subsequent slitting accuracy. The trimming module can use blades such as circular knives or razors to trim both sides of the continuous printing web simultaneously. The amount removed per side can be set according to the process, for example, within the range of 1 mm to 5 mm. The trimmed waste edges can be recycled to the waste recycling module via air suction or a winding device to avoid entanglement that could interfere with the main slitting process.

[0045] The continuous printed web, edge-trimmed (if any), is fed into the slitting module 400. The slitting module 400 is used to cut the continuous printed web into continuous printed web strips with narrower widths. Multiple cutters can be arranged transversely to the machine direction in the slitting module 400 (e.g., shown in…). Figure 2The cutting tool 401 (either a circular blade or a razor / shear blade) cuts the entire printed web into multiple strips. The spacing between the cutting tools 401 is determined by the required strip width and can be adjusted by a servo motor driven by a control unit to match the cutting width. The cutting tools 401 can be connected to a hydraulically or servo-driven pressure adjustment mechanism to improve cutting accuracy and minimize impact on the tension of the printed web. Wear detection sensors can also be installed on the cutting tools 401. In addition to cutting the entire continuous printed web into multiple narrow strips, the slitting module 400 may also cut waste material, for example, from near the edge. The narrow strips enter the subsequent rewinding process, while the waste material can be sent to the waste recycling module via air suction or a winding device. The slitting module can share a waste recycling module with the trimming module.

[0046] A rewinding module 500 is located downstream of the slitting module 400 for winding the slit printed web strips into sub-rolls. The rewinding module 500 includes a rewinding roller and a rewinding drive motor connected to the rewinding roller. The printed web strip is wound into a sub-roll on the rewinding roller, and the rewinding drive motor provides the power required for winding. The rewinding roller may be made of high-strength alloy steel. The rewinding drive motor can be a frequency converter or servo-driven rewinding motor. A receiving device, such as multiple receiving rollers arranged along the machine direction, may be arranged between the slitting module 400 and the rewinding module 500 to ensure that the web strip is fed to the rewinding module 500 at the expected speed, and that tension fluctuations remain within an acceptable range throughout the process. The rewinding module 500 may be equipped with a real-time roll diameter detection system and an automatic roll changing system to reduce manual intervention. Alternatively, roll changing may be performed manually.

[0047] A high-precision visual inspection unit 700 is arranged between the slitting module 400 and the rewinding module 500. It is used to acquire continuous images of the printed strip in real time and identify the position of the printed pattern on the strip based on these images. Accurate extraction of the position of the printed pattern on the strip provides a prerequisite for ensuring the consistency of the printed pattern spacing on the rewound material rolls. In one embodiment, such as... Figure 2As shown, continuous printed webs pass through the gap between a pair of rollers 20 in the direction indicated by the arrow and are fed to the slitting cutter 401. After being cut into printed web strips, they continue to pass through the industrial camera 701 equipped in the vision inspection unit 700 in the direction of the arrow, and then enter the rewinding module via another pair of rollers 20. Here, the vision inspection unit 700 is equipped with a high-resolution industrial camera 701 and an advanced image processing system, which can quickly and accurately identify the positional information of the printed pattern on the web strip. The high-speed industrial camera can be, for example, a resolution ≥ 5 megapixels and an acquisition frequency ≥ 200fps. The high-speed industrial camera is arranged above the web travel plane 10, with its lens optical axis perpendicular to the web travel plane 10, and its field of view covering the entire width of a single printed web strip, or covering the entire width of multiple parallel web strips. The industrial camera 701 can be position-adjustable. For example, a hanger is mounted above the web travel plane 10, spanning both edges of the printed web. This hanger has an adjustable bracket with XYZ three-way guide rails. An industrial camera 701 is mounted on the adjustable bracket, allowing its position to be adjusted along the XYZ axes. The industrial camera 10 can be held in the desired position by removable locking elements, such as locking bolts and nuts, to obtain clear and accurate images of the web strip.

[0048] A coaxial light source 702 illuminates the entire width of a single printed strip or the entire width of multiple parallel strips. In the illustrated embodiment, the light source 702 illuminates the printed strips from below the strip travel plane 10. The light source 702 is brightness adjustable to avoid interference from pattern reflections. In one embodiment, the brightness adjustment range of the light source is 5000-30000 lux. Additionally, the illumination angle of the light source 702 can be 30°-60°, and the wavelength can be matched to the color difference of the printed strip pattern.

[0049] The image processing unit can receive continuous images of the strip of fabric captured by the industrial camera 701, and preferably can also store these images. The image processing unit can identify the position coordinates of feature points in the images and send these coordinates to the control unit for calculating the actual pattern spacing. The control unit that performs the actual pattern spacing calculation can be the control unit of the entire slitting and rewinding device, or it can be the processing unit of the image processing unit itself, or the processing unit of the image processing unit can be part of the control unit of the slitting and rewinding device. The identification of the reference point coordinates by the image processing unit can be based on edge detection and feature matching algorithms, with an accuracy of ±0.05 mm.

[0050] The control of each unit and module of the slitting and rewinding device is performed by an intelligent control unit. This control unit is connected to the vision detection unit 700 and the unwinding drive motor of the unwinding module 100, and preferably also to the rewinding drive motor of the rewinding module 500 and the slitting module 400, as well as the aforementioned optional correction and trimming modules. The control unit receives sensing signals sent by each unit and module, and can also store these sensing signals if a memory is provided. Based on these sensing signals, the processor of the control unit analyzes and judges the operating status of each unit and module, and issues control commands to the associated units or modules based on preset conditions. For example, the image processing unit sends the pattern position information of the identified web strips to the control unit, which then calculates the actual spacing D between the patterns on the web strips based on the pattern position information. 实际 And the actual spacing D 实际 The preset standard distance D between the control unit and the control unit 标准 A comparison is made. Based on the comparison results, the speed of the unwinding drive motor is dynamically adjusted so that D... 实际 =D 标准 ±δ (δ is the allowable error threshold).

[0051] In addition to connecting the unwinding module 100, the control unit can also connect to the rewinding module 500, thereby adjusting the winding speed according to the actual spacing D. 实际 With standard spacing D 标准 The comparison results are used to coordinate the speeds of the unwinding drive motor and the rewinding drive motor to ensure D 实际 =D 标准 ±δ.

[0052] Understandably, unwinding tension can directly affect subsequent web correction and slitting accuracy; therefore, it can be coordinated with rewinding tension for control. This coordinated control process can be performed by the control unit based on the tension of the printed web between the unwinding and rewinding modules and the actual spacing D between the patterns on the web. 实际 This can be implemented using either or both. For example, in one embodiment, a first tension sensor can be positioned downstream of the unwinding roll to detect the tension of the continuous printed web near the unwinding roll, and a second tension sensor can be positioned upstream of the rewinding roll to detect the tension of the continuous printed web strip near the rewinding roll. The control unit receives the detection signals from the first and second tension sensors and compares the detection signals from the two tension sensors. Furthermore, the control unit also receives, as previously described, the actual spacing of the pattern on the web strip identified by the image processing unit and compares the actual spacing D. 实际 With standard spacing D 标准 By comprehensively evaluating the comparison results of the detection signals from the two tension sensors, and D... 实际 With D 标准 Based on the comparison results, the control unit sends control commands to the unwinding drive motor and the rewinding drive motor to ensure that D实际 =D 标准 ±δ.

[0053] It should be understood that although this specification describes various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0054] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes, modifications, and combinations made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A slitting and rewinding apparatus for printed webs, wherein the printed webs have a length along the machine direction and a width transverse to the machine direction, and a pattern is printed on the surface of the printed webs, characterized in that, The slitting and rewinding device includes: An unwinding module includes an unwinding roller carrying a master roll of the printing web and an unwinding drive motor connected to the unwinding roller. The unwinding module can unwind the master roll into a continuous printing web. A slitting module is arranged downstream of the unwinding module along the machine direction. The slitting module has a cutter capable of cutting the continuous printing web into strips of printing web with a narrower width. The rewinding module includes a rewinding roller that carries a sub-roll formed by winding the printed web strip and a rewinding drive motor connected to the rewinding roller; A visual inspection unit is arranged between the slitting module and the rewinding module. The visual inspection unit is configured to acquire images of the printed strip in real time and identify the position of the pattern on the printed strip based on the images. The control unit is connected to the vision detection unit and the unwinding drive motor of the unwinding module, and is configured to dynamically adjust the speed of the unwinding drive motor based on the position of the pattern on the identified printed strip.

2. The slitting and rewinding device for printed webs according to claim 1, characterized in that, The control unit is configured to: calculate the actual spacing between patterns based on the position of the pattern on the identified printed strip, compare the actual spacing with a preset spacing, and dynamically adjust the speed of the unwinding drive motor of the unwinding module based on the comparison result.

3. The slitting and rewinding device for printed webs according to claim 1, characterized in that, The visual detection unit includes: A light source is configured to illuminate the patterned area of ​​the printed strip; An industrial camera, configured to acquire continuous images of the printed strips in real time; An image processing unit is connected to the industrial camera and configured to identify the position of the pattern on the printed strip based on the acquired continuous images.

4. The slitting and rewinding device for printed webs according to claim 3, characterized in that, The optical axis of the lens of the industrial camera is perpendicular to the plane of travel of the printed fabric, and the field of view of the industrial camera covers at least the entire width of a single printed fabric strip.

5. The slitting and rewinding device for printed webs according to claim 3, characterized in that, The industrial camera is mounted on an adjustable bracket, which has XYZ three-way slide rails and locking elements detachably connected to the three-way slide rails.

6. The slitting and rewinding device for printed webs according to claim 3, characterized in that, The industrial camera is positioned above the traveling plane of the printed web, and the light source illuminates the patterned area of ​​the printed web strip from below, with the industrial camera and the light source aligned vertically.

7. The slitting and rewinding device for printed webs according to claim 1, characterized in that, The visual detection unit has a recognition accuracy of ≤0.1 mm and a sampling frequency of ≥200 Hz.

8. The slitting and rewinding device for printed webs according to claim 1, characterized in that, The slitting and rewinding device further includes a correction module located between the unwinding module and the slitting module. The correction module is configured to identify the position of the side edge of the continuous printing web. The control unit is configured to adjust the lateral position of the continuous printing web based on the identified position of the side edge of the continuous printing web.

9. The slitting and rewinding device for printed webs according to claim 8, characterized in that, The slitting and rewinding device further includes an edge trimming module, which is located between the correction module and the slitting module and is configured to cut off a set amount of edge from the continuous printing web.

10. A printed nonwoven fabric product, characterized in that, The printed nonwoven fabric products are produced using a slitting and rewinding device for printed webs as described in any one of claims 1 to 9.

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