A stable cloth conveying system and printing machine

Abstract

The present invention relates to the technical field of printing machines, and provides a stable cloth transmission system and a printing machine, wherein the stable cloth transmission system comprises a belt conveyor, a pressing device, a supporting device, a deviation correction device, a stripping device, a frame device, an elastic modulus detection device, and a control system, wherein the control system adjusts the relative rotation speed of at least one of a driving roller, a spreading roller, a deviation correction device, and a stripping device according to the elastic modulus parameter of the cloth transmission process detected by the elastic modulus detection device, and adjusts the cloth stress state so that the cloth is always in a flattened state to avoid pattern deformation. The present invention optimizes the integrated design structure of the belt conveyor, the deviation correction device, the pressing device, the stripping device, the supporting device, and the frame device, realizes the stability and flatness of the cloth during the transmission process, and particularly introduces an elastic modulus detection device to dynamically adjust the transmission state of the cloth, ensure the flatness of the cloth, and improve the printing quality and effect.

Description

Technical Field

[0001] The invention relates to the technical field of printing machines, and in particular to a stable cloth conveying system and a printing machine. Background Art

[0002] As a key equipment in the modern textile printing industry, the core advantage of digital active direct-injection printers is that they can directly print designed patterns on various textile fabrics through high-precision inkjet technology. This technology not only achieves high color saturation and detail expression of printed patterns, but also significantly improves production efficiency and reduces production costs. The guide belt drive structure in the digital direct-injection printer is its core component, which is responsible for the smooth transportation and precise positioning of the fabric, and has a vital impact on the final printing quality.

[0003] The existing guide belt type inkjet printing machine includes a base, a printer and a circular guide conveyor arranged on the base, and the print head on the printer is located above the upper plane of the guide belt. The guide conveyor is sleeved on the active transmission roller and the passive transmission roller, and there is no supporting device under the print head. When working, the pre-printed fabric is pasted on the guide conveyor, and the computer controls the print head to move back and forth along the printer movement track in the weft direction of the fabric, and the ink is sprayed onto the fabric according to the designed pattern; while the guide conveyor carries the fabric to move forward in the radial direction synchronously, completing the entire digital inkjet printing process.

[0004] Although the applicant has improved a high-efficiency digital active direct-injection printing machine fabric stable conveying system, including key components such as guide belts, drive systems, tensioning devices, guide systems and sensors. As a platform for carrying and moving fabrics, the guide belt must have wear-resistant and high-temperature resistant properties to ensure the stability of the fabric during high-speed movement. The drive system controls the running speed of the guide belt through a high-precision motor to meet different printing needs. The tensioning device is used to adjust the tightness of the guide belt to prevent it from sliding or slipping during use. The guide system ensures the accurate positioning of the fabric during the conveying process through guide rails or guide wheels to avoid printing errors caused by offset. Some high-end equipment is also equipped with sensors for real-time monitoring of the status of the guide belt and fabric, so as to make dynamic adjustments and improve printing quality. The conveying order of the fabric is: the fabric enters from the entrance, first passes through the cloth pressing roller to enter the guide belt, the cloth spreading roller under the guide belt spreads the fabric, and then peels it off through the separation roller to output the fabric. In this process, the sticking, spreading, tensioning and peeling of the fabric are all important.

[0005] Although the existing digital direct printing machine has made significant progress in the design of the belt drive structure, there are still a series of problems to be solved:

[0006] (1) Difficulty in separating the guide belt from the fabric: Since the surface of the guide belt is often coated with adhesive to ensure the stability of the fabric during transportation, the strong adhesion between the fabric and the guide belt after printing often makes it difficult to separate them. This not only affects production efficiency, but may also damage the fabric and reduce the quality of the finished product.

[0007] (2) The problem of flatness of the guide belt: The guide belt may be affected by uneven tension during the manufacturing and installation process, and the processing and installation errors of the transmission roller may cause the surface of the guide belt to be uneven. This directly affects the distance control between the print head and the fabric, resulting in unclear or deformed outlines of the printed pattern.

[0008] (3) Complexity of transmission components and installation accuracy: The belt tensioning system contains a large number of transmission components. Any carelessness or inaccurate size during installation and debugging may cause unevenness of the fabric above the belt. In addition, vibration in the working environment may also cause a short fluctuation in the distance between the belt and the fabric, further affecting the printing quality.

[0009] (4) Difficulty in independent operation of the system and troubleshooting: Most of the existing printing machines' components, such as the belt drive structure, tensioning system, fabric flattening and output, operate independently. When a problem occurs in the printing pattern, due to the lack of effective linkage between the systems, it is difficult to find the root cause of the problem immediately, and the machine often needs to be shut down for comprehensive maintenance, which increases production costs and time costs.

[0010] (5) Insufficient dynamic adjustment capability: Although some high-end equipment is equipped with sensors to monitor the status of the guide belt and fabric in real time, the dynamic adjustment capability of the existing control system is still insufficient when facing complex and changing printing requirements. Especially in the high-speed printing process, real-time monitoring and rapid response to tiny deformation of the fabric becomes a major challenge.

[0011] (6) Material properties and process adaptability: Different fabrics have differences in elastic modulus, thickness, surface properties, etc., which puts higher requirements on the adaptability of the belt drive system. Existing systems often cannot fully cover the characteristics of various fabrics, resulting in unstable printing effects and high scrap rates in actual applications.

[0012] In summary, there are still many problems to be solved in the design of the guide belt drive structure of the existing digital direct injection printing machine. In order to solve these problems and improve the overall performance and efficiency of the printing machine, it is necessary to further optimize and innovate the guide belt drive structure and its control system. Summary of the invention

[0013] In view of this, the present invention aims to propose a stable fabric conveying system and a printing machine, aiming to solve the deformation problem caused by uneven force during fabric conveying, ensure the flatness of the fabric through real-time detection and dynamic adjustment, and improve the printing quality and effect.

[0014] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0015] The first object of the present application is to disclose a cloth stable conveying system, comprising:

[0016] A guide belt transmission device, comprising a driving roller, a driven roller and a guide belt, wherein the guide belt rotates under the tensioning action of the driving roller and the driven roller;

[0017] A material pressing device, arranged at the input end of the fabric, for attaching the fabric to the guide belt;

[0018] A supporting device, comprising at least one spreading roller, for providing a supporting force perpendicular to the moving direction of the guide belt;

[0019] A deviation correction device is used to correct the running direction of the guide belt;

[0020] A stripping device, arranged at the output end of the cloth, for stripping the cloth from the guide belt;

[0021] A frame device, used for fixing at least one of the pressing device, the supporting device, the deviation correcting device, and the stripping device;

[0022] An elastic modulus detection device, which is arranged on the frame device or the printer, and detects the elastic modulus of the cloth in real time during the conveying process;

[0023] The control system adjusts the relative rotation speed of at least one of the driving roller, the spreading roller, the deviation correcting device and the stripping device according to the elastic modulus parameters of the cloth during the conveying process detected by the elastic modulus detecting device, and adjusts the stress state of the cloth so that the cloth is always in a flat state to avoid pattern deformation.

[0024] Furthermore, the elastic modulus detection device uses any one of a laser displacement sensor, a fiber grating sensor, a capacitive displacement sensor, an optical sensor and a camera system to detect and calculate the elastic modulus of the fabric based on the slight deformation during the fabric transmission process.

[0025] Furthermore, the stripping device includes a stripping roller, which is mounted on a frame device and can receive and support the movement of the cloth and separate the cloth from the guide belt; the supporting device includes a plurality of spreading rollers, which are mounted on the frame device and are tangent to the back of the working surface of the guide belt. During the cloth transmission process, if the elastic modulus increases, the control system obtains the positioning and elastic modulus value of the deformation, and immediately adjusts the rotation speed of the spreading roller and the stripping roller. The stripping roller is used to give the cloth an outward force, and the spreading roller closest to the deformation position applies a reverse force or reduces its rotation speed. The two forces interact with each other, so that the slight deformation can be quickly restored to ensure its smooth transmission.

[0026] Furthermore, the correction device includes a fixed correction roller and a movable correction roller, the fixed correction roller and the movable correction roller are mounted on the frame device and are located between the driving roller and the driven roller in the second direction, the guide belt is sleeved on the driving roller, the driven roller, the fixed correction roller and the movable correction roller, and the guide belt is corrected by adjusting the position of the movable correction roller on the frame device.

[0027] Furthermore, the stripping roller, the driving roller, and the driven roller are sequentially arranged in the second direction, and along the height direction, the driving roller and the driven roller are located at the same height, and the top of the stripping roller is located below the top of the driving roller.

[0028] Furthermore, the stripping roller is transmission-connected to the driving roller, the stripping roller and the driving roller rotate in the same direction, and the rotational angular velocity of the stripping roller is greater than the rotational angular velocity of the driving roller.

[0029] Furthermore, when adjusting the speed of the driving roller to alleviate the deformation of the fabric caused by the increase of the elastic modulus during the printing process, the adjustment principle is:

[0030] ;

[0031] Among them, Δ w drive is the change in the speed of the driving roller, Δ E is the change in elastic modulus of the cloth, E 0 is the initial elastic modulus, v feed is the feeding speed of the fabric into the printing area, L 0 is the initial length of the cloth.

[0032] Furthermore, the material pressing device includes a cloth pressing roller and a first adjusting device. The cloth pressing roller is located above the working surface of the guide belt and elastically slides up and down under the action of the first adjusting device. The bottom of the cloth pressing roller can be in contact and connected with the guide belt, thereby being able to attach the cloth to the guide belt.

[0033] Furthermore, the material pressing device includes two second mounting brackets, and the two second mounting brackets extend from both ends of the cloth pressing roller in the length direction. The first adjusting device is arranged on the second mounting brackets and can drive the cloth pressing roller to move up and down as a whole.

[0034] Compared with the prior art, the cloth stabilization conveying system of the present invention has the following advantages:

[0035] (1) The stable fabric conveying system of the present invention achieves the stability and flatness of the fabric during the conveying process by optimizing the integrated design structure of the guide belt conveying device, the deviation correction device, the material pressing device, the peeling device, the supporting device and the frame device, and particularly introduces an elastic modulus detection device, which dynamically adjusts the conveying state of the fabric by real-time monitoring the slight deformation of the fabric and calculating the elastic modulus. It can effectively deal with adverse factors such as potential irregular force on the surface of the guide belt and vibration in the working environment, ensure that the fabric always remains flat during the conveying process, not only prevent the change of the distance between the print nozzle and the fabric, but also avoid the occurrence of problems such as ink diffusion, unclear pattern outline or deformation, and significantly improve the printing effect and quality of the digital printing machine.

[0036] (2) The stable cloth conveying system described in the present invention can respond quickly and adjust the operating status of the cloth conveying device accordingly, thereby effectively improving the overall performance and printing quality of the digital printing machine.

[0037] Another object of the present invention is to provide a printing machine, which includes the cloth stabilizing conveying system as described above.

[0038] The printing machine described in this application introduces new technical means and design concepts. Through real-time detection and dynamic adjustment, it effectively ensures the smooth transmission of fabrics, improves the printing quality, and records valuable data to support subsequent analysis and improvement, which significantly enhances the overall performance and printing quality of the digital printing machine and provides users with a more stable and reliable printing solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0040] Figure 1 It is a structural schematic diagram of the rack transmission system according to an embodiment of the present invention;

[0041] Figure 2 It is a structural schematic diagram of the rack transmission system according to the embodiment of the present invention from a second viewing angle;

[0042] Figure 3 It is a cross-sectional structural schematic diagram of the rack transmission system according to an embodiment of the present invention;

[0043] Figure 4 for Figure 3 A partial enlarged structural diagram of the middle A part;

[0044] Figure 5 It is a structural schematic diagram of the rack device according to an embodiment of the present invention;

[0045] Figure 6 It is a partial structural schematic diagram of the guide belt transmission device and the deviation correction device according to an embodiment of the present invention;

[0046] Figure 7 It is a partial structural schematic diagram of the belt conveying device, the deviation correcting device and the supporting device according to the embodiment of the present invention;

[0047] Figure 8 It is a partial structural schematic diagram of the peeling roller and the transmission assembly according to an embodiment of the present invention;

[0048] Fig. 9 It is a partial structural schematic diagram of the material pressing device according to an embodiment of the present invention;

[0049] Fig.10 It is a partial structural schematic diagram of the material pressing device according to the embodiment of the present invention from a second viewing angle;

[0050] Description of reference numerals:

[0051] 1000, cloth stable transmission system; 100, frame device; 200, belt transmission device; 300, deviation correction device; 500, material pressing device; 600, stripping device; 700, supporting device;

[0052] 1. Frame plate; 2. Connecting rod; 3. Driving roller; 4. Driven roller; 5. First driving assembly; 6. First mounting bracket; 7. Peeling roller; 8. Cloth pressing roller; 10. Fixed deviation correction roller; 11. Movable deviation correction roller; 12. Guide belt; 13. Cloth spreading roller; 14. First adjusting device; 15. Second driving assembly; 16. Second mounting bracket; 17. Third mounting bracket; 18. First cover box; 19. First transmission wheel; 20. Second transmission wheel; 21. First conveyor belt; 22. Cloth pressing roller bearing seat; 23. Fourth mounting bracket; 24. Heating tube; 25. Fifth mounting bracket; 26. First driving shaft; 27. First guide shaft. DETAILED DESCRIPTION

[0053] In order to make the technical means, objectives and effects of the present invention easy to understand, the embodiments of the present invention are described in detail below with reference to specific drawings.

[0054] It should be noted that all the terms used in the present invention for directional and positional indications, such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "top", "lower", "lateral", "longitudinal", "center", etc., are only used to explain the relative positional relationship and connection status between the components in a certain state (as shown in the accompanying drawings), and are only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0055] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0057] In the existing digital direct-injection printing machine, since the inner layer of the cloth guide is the base fabric (the base fabric is woven from warp and weft yarns), during the weaving of the base fabric and the pouring of rubber on the surface of the base fabric, the warp and weft yarns are subjected to uneven tension. Therefore, the cloth guide with rubber on the surface also has potential irregular force. At the same time, the active and passive rollers of the cloth guide also have processing and installation errors, such as the straightness and cylindricity of the rollers, the horizontality of the rollers, the parallelism between the two rollers, etc., so the installation and debugging If you are not careful or the working environment vibrates, the upper plane (i.e., the working surface) of the cloth guide conveyor will often become uneven, while the movement path of the print head is very precise and straight. Therefore, the distance between the print head and the cloth guide conveyor when working, that is, the distance between the print head and the fabric (because the fabric is pasted on the cloth guide conveyor), will often be different, causing the ink sprayed by the print head to spread, resulting in unclear outlines of the printed patterns or deformation of the pre-made patterns, affecting the printing effect and printing quality, and even producing defective products.

[0058] In order to overcome the above technical problems, Figures 1 to 10 As shown, the present application discloses a cloth stabilizing transmission system 1000, comprising:

[0059] The guide belt transmission device 200 comprises a driving roller 3, a driven roller 4 and a guide belt 12, wherein the guide belt 12 rotates under the tensioning action of the driving roller 3 and the driven roller 4;

[0060] The pressing device 500 is arranged at the input end of the cloth and is used to attach the cloth to the guide belt 12;

[0061] The supporting device 700 includes at least one spreading roller 13, which is used to provide a supporting force perpendicular to the moving direction of the guide belt 12 for the guide belt 12;

[0062] A deviation correction device 300, used to correct the running direction of the guide belt 12;

[0063] The stripping device 600 is arranged at the output end of the cloth and is used to strip the cloth from the guide belt 12;

[0064] The frame device 100 is used to fix at least one of the pressing device 500, the supporting device 700, the deviation correcting device 300, and the stripping device 600;

[0065] An elastic modulus detection device, which is arranged on the frame device 100 or the printer, and detects the elastic modulus of the cloth in real time during the conveying process;

[0066] The control system adjusts the relative rotation speed of at least one of the drive roller 3, the spreading roller 13, the deviation correction device 300, and the stripping device 600 according to the elastic modulus parameters of the cloth during the conveying process detected by the elastic modulus detection device, and adjusts the stress state of the cloth to keep the cloth in a flat state at all times to avoid pattern deformation.

[0067] The cloth stabilization transmission system 1000 disclosed in the present application includes, in terms of overall design, a frame device 100, a belt conveyor device 200, a material pressing device 500, a supporting device 700, a deviation correction device 300, a peeling device 600, and an elastic modulus detection device, wherein the frame device 100 is a rectangular parallelepiped structure as a whole, and a driving roller 3 and a driven roller 4 of the belt conveyor device 200 are assembled on the frame device 100, and the driving roller 3 and the driven roller 4 are both tubular structures and are extended along a first direction. At the same time, the driving roller 3 and the driven roller 4 are spaced apart along a second direction, and the first direction is perpendicular to the second direction, wherein the first direction is the width direction of the frame device 100, and the second direction is the length direction of the frame device 100. At the same time, the guide belt 12 is sleeved on the driving roller 3 and the driven roller 4. The guide belt transmission device 200 can drive the guide belt 12 to move when it is working, and at this time, the guide belt 12 can form a working surface for the cloth to move along the second direction. The pressing device 500, the supporting device 700, the correcting device 300, and the stripping device 600 are all assembled on the frame device 100 to ensure reliable and stable transmission of the cloth on the working surface of the guide belt 12. On this basis, the system specially introduces an elastic modulus detection device. The sensor is configured on the frame device 100 or the printer, and can detect the elastic modulus of the cloth in the transmission process in real time. The detected elastic modulus parameters are analyzed in real time through the control system, and the relative rotation speeds of key components such as the driving roller 3, the spreading roller 13, the correcting device 300 and the stripping device 600 are dynamically adjusted accordingly, thereby changing the stress state of the cloth. This dynamic adjustment ensures that the fabric remains flat during the conveying process, thereby ensuring the consistency of the distance between the print head and the fabric, effectively avoiding the problem of ink diffusion caused by distance changes.

[0068] The fabric stable transmission system 1000 disclosed in the present application can dynamically adjust the transmission state of the fabric by real-time detection of the elastic modulus during fabric transmission, effectively deal with potential irregular force changes on the surface of the guide belt 12 and adverse factors such as vibration in the working environment, ensure that the fabric always remains flat during the transmission process, and not only prevent the change in the distance between the print nozzle and the fabric, but also avoid the occurrence of problems such as ink diffusion, unclear or deformed pattern outlines, and significantly improve the printing effect and quality of the digital printing machine. In addition, the elastic modulus data recorded by the system also provides strong support for the later analysis of the force changes of the fabric during the printing process, which is convenient for problem tracking and process improvement, thereby further improving the overall performance and printing quality of the digital printing machine.

[0069] In the example of the present application, the elastic modulus, also known as Young's modulus, is an important parameter in material mechanics, which is used to describe the elastic deformation ability of a material when subjected to force. It is the proportional coefficient between the stress and strain of a material, reflecting the stiffness and elastic properties of the material. The elastic modulus detection device in the cloth stable transmission system 1000 described in the present application uses any one of a laser displacement sensor, a fiber grating sensor (FBG), a capacitive displacement sensor, an optical sensor, and a camera system for detection and calculation. When a laser displacement sensor is used, the displacement of the cloth surface is determined by emitting a laser beam and measuring the time it takes for it to reflect back. This sensor has the characteristics of high precision and fast response, and is very suitable for real-time measurement of small deformations of the cloth. The sensor is installed above the cloth movement path, and the surface deformation of the cloth can be accurately monitored. It has the advantages of high resolution, non-contact measurement, and is suitable for fast dynamic environments. When using a fiber Bragg Grating (FBG) sensor, the sensitivity of the Bragg grating in the optical fiber to strain is used to measure the deformation of the material. The optical fiber is embedded or fixed on the fabric, and the strain of the fabric can be monitored in real time during the printing process. When using this sensor structure to detect the elastic modulus of the fabric, it has the advantages of high sensitivity, multi-point monitoring, and suitability for long-distance measurement. When using a high-resolution camera system combined with image processing technology for elastic modulus detection, the surface deformation of the fabric can be monitored in real time. By analyzing the displacement of the characteristic points or marking points on the surface of the fabric, the strain of the fabric can be calculated, and thus the elastic modulus can be calculated. When in use, by setting obvious marking points on the surface of the fabric, the displacement of these points is analyzed in real time using a camera and image processing software to calculate the elastic modulus. This method can be applied to complex surfaces and can monitor deformation conditions of multiple points at the same time. When using a capacitive displacement sensor, the distance between the object and the sensor is measured by detecting changes in capacitance. By monitoring changes in the thickness of the cloth, the degree of deformation can be inferred. When in use, the capacitive displacement sensor is installed on the moving path of the cloth to monitor changes in the thickness of the cloth in real time. This method has the advantages of high sensitivity and non-contact measurement, and is suitable for the detection of tiny displacements.

[0070] The stable cloth conveying system 1000 of the present application performs elastic modulus detection and calculation by introducing any elastic modulus sensor such as a laser displacement sensor, a fiber grating sensor (FBG), a capacitive displacement sensor, an optical sensor, and a camera system, and monitors the deformation of the cloth being conveyed in real time. The structural form and working principle of these sensors are known prior art, and the installation structure is set accordingly according to its application mode, and this application does not make too many restrictions. By setting these elastic modulus sensors, it is possible to accurately capture the slight deformation of the cloth, and by measuring the stress and strain of the cloth, the elastic modulus is calculated, thereby reflecting the elastic deformation ability of the cloth when subjected to force. The system dynamically adjusts the operating state of the cloth conveying device according to these data, such as adjusting the rotation speed of the driving roller and the spreading roller, etc., to ensure that the cloth remains flat during the conveying process, thereby ensuring the printing quality and effect.

[0071] As a preferred example of the present application, the stripping device 600 includes a stripping roller 7, which is mounted on the frame device 100. The stripping roller 7 can receive and support the movement of the cloth and separate the cloth from the guide belt 12; the supporting device 700 includes a plurality of spreading rollers 13, which are mounted on the frame device 100 and are tangent to the back of the working surface of the guide belt 12. During the cloth transmission process, if the elastic modulus increases, the control system obtains the positioning and elastic modulus value of the deformation, and immediately adjusts the rotation speed of the spreading roller 13 and the stripping roller 7. The stripping roller 7 is used to give the cloth an outward force, and the spreading roller 13 closest to the deformation position applies a reverse force or reduces the rotation speed. The two forces interact with each other to quickly restore the slight deformation and ensure its smooth transmission.

[0072] In the stable cloth transmission system 1000 of the present application, the stripping device 600 and the supporting device 700 work together, and the real-time adjustment and rapid response of the control system ensure that the cloth always remains flat during the transmission process, thereby greatly improving the printing effect and quality of the digital printing machine. As a preferred example of the present application, when the elastic modulus value is small, the spreading roller 13 only needs to reduce the rotation speed without applying a reverse force.

[0073] As a preferred example of the present application, the correcting device 300 includes a fixed correcting roller 10 and a movable correcting roller 11, the fixed correcting roller 10 and the movable correcting roller 11 are assembled on the frame device 100 and are located between the driving roller 3 and the driven roller 4 in the second direction, the guide belt 12 is sleeved on the driving roller 3, the driven roller 4, the fixed correcting roller 10 and the movable correcting roller 11, and the guide belt 12 is corrected by adjusting the position of the movable correcting roller 11 on the frame device 100. As a specific example of the present application, the driving roller 3, the driven roller 4, the fixed deflection correction roller 10 and the movable deflection correction roller 11 are parallel to each other (that is, each two rollers are parallel to each other), and are distributed in a quadrilateral shape as a whole. The driving roller 3 and the driven roller 4 are located above the fixed deflection correction roller 10 and the movable deflection correction roller 11, and are used to drive the guide belt 12 to run. The fixed deflection correction roller 10 and the movable deflection correction roller 11 are used to prevent the guide belt 12 from running off, and when the guide belt 12 runs off, the position of the movable deflection correction roller 11 on the frame device 100 is adjusted by a deflection correction mechanism (not shown in the figure). Preferably, the distance between the driving roller 3 and the driven roller 4 in the second direction is greater than the distance between any other two rollers in the second direction.

[0074] In the cloth stable transmission system 1000 of the present application, a correction device 300 including a fixed correction roller 10 and a movable correction roller 11 is set, and the two together with the driving roller 3 and the driven roller 4 form a quadrilateral layout, and the guide belt 12 is set on these four rollers. When the rotation speed change of the spreading roller 13 causes the tension change or deviation of the guide belt 12, the movable correction roller 11 in the correction device 300 will automatically adjust its position under the action of the correction mechanism to correct the running direction of the guide belt. This design ensures that the guide belt 12 is always in a tensioned state, thereby maintaining the stability of the entire transmission system. This setting introduces a correction device 300 with an automatic adjustment function, and the correction device 300 works in coordination with the spreading roller 13, so that the system can still remain stable when the rotation speed of the spreading roller 13 changes, effectively preventing the problem of deviation and uneven tension of the guide belt. In addition, the design of the quadrilateral layout also has a certain error compensation effect, which further enhances the fault tolerance and operation stability of the system.

[0075] In the example of the present application, the stripping roller 7, the driving roller 3, and the driven roller 4 are arranged in sequence in the second direction, and in the height direction, the driving roller 3 and the driven roller 4 are located at the same height, and the top of the stripping roller 7 is located below the top of the driving roller 3. In the stable cloth conveying system of the present application, the stripping roller 7 of the stripping device 600 is cleverly assembled on the frame device 100, and its position is lowered relative to the driving roller 3 and the driven roller 4. This design is to ensure that when the cloth moves under the drive of the guide belt 12, it can be smoothly separated from the guide belt 12 when it reaches the stripping roller 7, and the cloth can be smoothly received when the cloth is separated from the guide belt 12, so as to avoid pulling or damage to the cloth caused by the height difference, thereby ensuring the smooth transition of the cloth and the continuity of the conveying. Here, it should be noted that the stripping roller 7, the driven roller 4 and the driving roller 3 can also be arranged in sequence in the second direction, without affecting the transportation of the guide belt 12, so as to ensure that the stripping roller 7 is located at the output end of the guide belt 12 and can receive and support the movement of the medium.

[0076] This arrangement realizes the smooth stripping of the fabric, effectively avoiding the problem of fabric damage and discontinuous transmission during the stripping process, not only improving the stability and reliability of fabric transmission, but also extending the service life of the fabric and the guide belt 12.

[0077] As a preferred example of the present application, the stripping roller 7 is connected to the driving roller 3 in a transmission manner, the stripping roller 7 and the driving roller 3 rotate in the same direction and the rotational angular velocity of the stripping roller 7 is greater than the rotational angular velocity of the driving roller 3. As a specific example of the present application, the belt-guided transmission device 200 further includes a first driving component 5, the first driving component 5 is mounted on the frame device 100 through a first mounting bracket 6, the first driving component 5 can drive the driving roller 3 to rotate, a second transmission wheel 20 is arranged at the other end of the driving roller 3, a first transmission wheel 19 is arranged on the coaxial side of the stripping roller 7 close to the second transmission wheel 20, and the first transmission wheel 19 and the second transmission wheel 20 are connected in a transmission manner through a first conveyor belt 21. As a preferred example of the present application, the ratio of the angular velocity of the stripping roller 7 to that of the driving roller 3 is 1:2~7.

[0078] This arrangement drives the driving roller 3 to rotate through the first driving component 5, and uses the transmission wheel and the conveyor belt to transmit power to the peeling roller 7, so that the peeling roller 7 and the driving roller 3 can rotate in the same direction through the transmission connection, and realize the angular velocity ratio control between the two, thereby improving the continuity and stability of the fabric transmission, and effectively reducing the printing quality problems caused by poor peeling, and can flexibly adjust the force of the peeling roller according to the characteristics and transmission requirements of different fabrics, thereby realizing more intelligent and refined fabric transmission control.

[0079] As a preferred example of the present application, when adjusting the rotation speed of the driving roller 3 to alleviate the deformation of the cloth caused by the increase of the elastic modulus during the printing process, the adjustment principle is:

[0080] ;

[0081] Among them, Δ w drive is the change in the speed of the driving roller, Δ E is the change in elastic modulus of the cloth, E 0 is the initial elastic modulus, v feed is the feeding speed of the fabric into the printing area, L 0 is the initial length of the cloth.

[0082] According to the relationship between the tension, strain and speed of the driving roller of the fabric, the elastic modulus of the fabric is E It is a parameter that measures the stiffness of the material. The stress of the cloth σ and strain ε The relationship satisfies: σ = E * ε ;

[0083] During the printing process, if the elastic modulus of the fabric increases, it means that the deformation (strain) of the fabric will decrease under the same stress. However, if the speed of the driving roller 3 remains unchanged and the elastic modulus increases, it may cause the local stress of the fabric to increase, thus causing undesirable deformation or quality problems. Therefore, it is necessary to control the stress of the fabric by adjusting the speed of the driving roller 3.

[0084] Assume that the cloth moves at a constant speed in the printing press. v By, if the elastic modulus of the cloth E Increase, in order to maintain the tension of the fabric T (i.e. stress) is within the controllable range, the speed of the driving roller 3 needs to be adjusted w To change the speed of the cloth,

[0085] Fabric tension T and speed v The relationship between can be expressed by the following formula:

[0086] ;

[0087] in, E is the elastic modulus of the fabric; A is the cross-sectional area of ​​the fabric, v drive Provided for the speed of the drive roller 3, v feed is the feeding speed of the fabric into the printing area, L 0 is the initial length of the cloth.

[0088] In order to alleviate the deformation, the speed of the driving roller should be adjusted w drive , making the speed of the cloth v drive Slightly higher or lower than the feed rate v feed To control the tension and strain of the fabric. If the elastic modulus E Increase, and hope to maintain the tension of the fabric T The speed of the driving roller 3 can be adjusted w drive , the adjustment principle is:

[0089] ;

[0090] Among them, Δ w drive is the change in the speed of the driving roller, Δ E is the change in elastic modulus of the cloth, E 0 is the initial elastic modulus.

[0091] The present application discloses a stable cloth conveying system 1000. Since there is a complex interaction relationship between the rotation speed of the driving roller 3 and the elastic modulus of the cloth, when the elastic modulus increases, the strain of the cloth can be reduced by appropriately increasing the rotation speed of the driving roller 3. If the elastic modulus decreases, the rotation speed of the driving roller 3 is appropriately slowed down to alleviate possible deformation. By establishing a feedback control system, the tension and deformation of the cloth can be monitored in real time, and the rotation speed of the driving roller 3 can be automatically adjusted to keep the cloth in the best working state.

[0092] As a preferred example of the present application, the pressing device 500 includes a cloth pressing roller 8 and a first adjusting device 14. The cloth pressing roller 8 is located above the working surface of the guide belt 12 and elastically slides up and down under the action of the first adjusting device 14. The bottom of the cloth pressing roller 8 can be in contact with and connected to the guide belt 12, so that the cloth can be attached to the guide belt 12. In the example of the present application, the cloth pressing roller 8 extends along the first direction and is arranged parallel to the driven roller 4. Since the guide belt 12 is in a straightened state due to the transmission of the driving roller 3, the driven roller 4, the fixed deviation correction roller 10 and the movable deviation correction roller 11, when the cloth pressing roller 8 presses down the guide belt 12, the guide belt 12 has a force to drive the cloth pressing roller 8 to move upward, thereby achieving the bonding of the guide belt 12 and the cloth, and ensuring the subsequent printing effect.

[0093] As a preferred example of the present application, the material pressing device 500 includes two second mounting brackets 16, and two second mounting brackets 16 extend from both ends of the cloth pressing roller 8 in the length direction. The first adjusting device 14 is arranged on the second mounting brackets 16 and can drive the cloth pressing roller 8 to move up and down as a whole. Preferably, one or two first adjusting devices 14 can be provided so that the cloth pressing roller 8 can adjust the distance between the cloth pressing roller 8 and the guide belt 12 in the first direction. As a specific example of the present application, the first adjusting device 14 includes a second driving component 15 and a cloth pressing roller bearing seat 22, and the cloth pressing roller bearing seat 22 is arranged at the extended end of the cloth pressing roller 8. A first driving shaft 26 or a first driving shaft 26 and a first guide shaft 27 are arranged between the second driving component 15 and the cloth pressing roller bearing seat 22, and the second driving component 15 drives the cloth pressing roller bearing seat 22 and the cloth pressing roller 8 to adjust the position in the first direction through the first driving shaft 26.

[0094] The device drives the cloth pressing roller 8 to move up and down through the second mounting bracket and the first adjusting device, so that the cloth pressing roller 8 can flexibly adjust the distance between it and the guide belt 12 according to the actual thickness of the cloth, ensuring that the medium is smoothly transported to the guide belt to achieve printing, and effectively avoiding unstable transmission or printing quality problems caused by changes in medium thickness. In addition, the system can also achieve automatic and precise adjustment of the height of the cloth pressing roller 8 by establishing a control system, combined with a displacement sensor or a distance sensor, etc., to improve the stability and adaptability of cloth transmission. As a preferred example of the present application, a fifth mounting frame 25 is set at the upper end of the second mounting bracket 16, and the first drive shaft 26 is assembled on the fifth mounting frame 25. The first guide shaft 27 passes through the fifth mounting frame 25 and guides the cloth pressing roller bearing seat 22 when it moves up and down.

[0095] As a preferred example of the present application, a heating tube 24 is arranged at the center of the cloth pressing roller 8, and the end of the heating tube 24 is assembled with the fourth mounting bracket 23, and the fourth mounting bracket 23 is arranged on the cloth pressing roller bearing seat 22. In the specific example of the present application, by arranging the heating tube 24 accommodated in the cloth pressing roller 8 on the cloth pressing roller bearing seat 22, the heating tube 24 and the cloth pressing roller 8 are moved integrally and can heat the cloth pressing roller 8, so as to keep the temperature of the cloth pressing roller 8 at a relatively high position, thereby ensuring that the cloth pressing roller 8 can squeeze the cloth.

[0096] As a preferred example of the present application, a cloth spreading roller 13 is arranged on the second mounting bracket 16, and the cloth spreading roller 13, the cloth pressing roller 8, and the driven roller 4 are arranged in a triangle with the center points on the cross section in the first direction. At this time, along the second direction, the distance between the cloth pressing roller 8 and the driven roller 4 is smaller than the distance between the cloth spreading roller 13 and the driven roller 4, that is, the above-mentioned cloth pressing roller 8 is arranged closer to the driven roller 4. Such a setting can ensure that the cloth pressing roller 8 is tangent to the driven roller 4 to ensure the adhesion of the guide belt 12 and the cloth, ensure the stability and flatness of the cloth during the printing process, and improve the printing effect of the cloth. Moreover, it can also avoid the situation where the cloth pressing roller 8 is tangent to the cloth spreading roller 13 and the driven roller 4 at the same time, which affects the pressing effect of the cloth pressing roller 8.

[0097] As a preferred example of the present application, the frame device 100 includes two frame plates 1, and the two frame plates 1 are connected by a plurality of connecting rods 2. At the same time, the main structures of the driving roller 3, the driven roller 4, the stripping roller 7, the cloth pressing roller 8, the fixed deviation correction roller 10, the movable deviation correction roller 11, and the cloth spreading roller 13 are all located between the two frame plates 1 and connected thereto through bearings to ensure that the above-mentioned multiple rollers can rotate around their own axes. As a preferred example of the present application, a third mounting bracket 17 and a first cover box 18 are provided at at least one end of the stripping roller 7, the first transmission wheel 19 is provided in a groove of the first cover box 18, and the third mounting bracket 17 is connected to the frame plate 1.

[0098] The stable cloth conveying system disclosed in the present application realizes the stability and flatness of the cloth during the conveying process by optimizing the integrated design structure of the guide belt transmission device 200, the correcting device 300, the pressing device 500, the stripping device 600, the supporting device 700 and the frame device 100, and especially introduces an elastic modulus detection device. By real-time monitoring of the slight deformation of the cloth and calculating the elastic modulus, the system can respond quickly and adjust the operating state of the cloth conveying device accordingly. This innovative design enables the system to dynamically adjust the relative rotation speeds of key components such as the driving roller 3, the spreading roller 13, the active correcting roller 11 and the stripping roller 7, ensuring that the cloth always remains flat during the conveying process, avoiding changes in the distance between the print nozzle and the cloth, and thus solving printing defects such as ink diffusion, unclear or deformed pattern contours caused by different distances.

[0099] The present application also discloses a printing machine, comprising the cloth stabilizing conveying system 1000 as described in the above embodiment.

[0100] The printing machine described in this application introduces new technical means and design concepts. Through real-time detection and dynamic adjustment, it effectively ensures the smooth transmission of fabrics, improves the printing quality, and records valuable data to support subsequent analysis and improvement, which significantly enhances the overall performance and printing quality of the digital printing machine and provides users with a more stable and reliable printing solution.

[0101] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A stable cloth conveying system, characterized in that: include: A guide belt transmission device (200), comprising a driving roller (3), a driven roller (4) and a guide belt (12), wherein the guide belt (12) rotates under the tensioning action of the driving roller (3) and the driven roller (4); A material pressing device (500), arranged at the input end of the cloth, and used for attaching the cloth to the guide belt (12); A supporting device (700) comprising at least one spreading roller (13) for providing a supporting force perpendicular to the moving direction of the guide belt (12) for the guide belt (12); A deviation correction device (300) for correcting the running direction of the guide belt (12); A peeling device (600) is arranged at the output end of the cloth and is used to peel the cloth from the guide belt (12); A frame device (100) used to fix at least one of the pressing device (500), the supporting device (700), the deviation correcting device (300), and the stripping device (600); An elastic modulus detection device, arranged on the frame device (100) or the printer, for detecting the elastic modulus of the cloth in real time during the conveying process; A control system, according to elastic modulus parameters detected by the elastic modulus detection device during the fabric transmission process, adjusts the relative rotation speed of at least one of the drive roller (3), the spreading roller (13), the deviation correction device (300), and the stripping device (600), and adjusts the stress state of the fabric so that the fabric is always in a flattened state to avoid pattern deformation; The elastic modulus detection device uses any one of a laser displacement sensor, a fiber grating sensor, a capacitive displacement sensor, an optical sensor and a camera system to detect and calculate the elastic modulus of the fabric based on the slight deformation during the fabric transmission process; The stripping device (600) comprises a stripping roller (7), the stripping roller (7) being mounted on the frame device (100), the stripping roller (7) being capable of receiving and supporting the movement of the cloth and separating the cloth from the guide belt (12); the supporting device (700) comprises a plurality of spreading rollers (13), the spreading rollers (13) being mounted on the frame device (100) and being tangent to the back side of the working surface of the guide belt (12); During the transmission of the fabric, if the elastic modulus increases, the control system obtains the location and elastic modulus value of the deformation, and immediately adjusts the rotation speeds of the spreading roller (13) and the peeling roller (7). The peeling roller (7) applies an outward force to the fabric, and the spreading roller (13) closest to the deformation position applies a reverse force or reduces its rotation speed. The two forces interact with each other, and the slight deformation can be quickly restored, ensuring smooth transmission. The peeling roller (7) is transmission-connected to the driving roller (3); the peeling roller (7) and the driving roller (3) rotate in the same direction, and the rotational angular velocity of the peeling roller (7) is greater than the rotational angular velocity of the driving roller (3). When adjusting the rotation speed of the driving roller (3) to alleviate the deformation of the fabric caused by the increase of the elastic modulus during the printing process, the adjustment principle is: ； Among them, Δ w drive is the change in the speed of the driving roller, Δ E is the change in elastic modulus of the cloth, E 0 is the initial elastic modulus, v feed is the feeding speed of the fabric into the printing area, L 0 is the initial length of the cloth.

2. The cloth stabilizing conveying system according to claim 1, characterized in that: The deflection correction device (300) comprises a fixed deflection correction roller (10) and a movable deflection correction roller (11); the fixed deflection correction roller (10) and the movable deflection correction roller (11) are mounted on the frame device (100) and are located between the driving roller (3) and the driven roller (4) in the second direction; the guide belt (12) is sleeved on the driving roller (3), the driven roller (4), the fixed deflection correction roller (10) and the movable deflection correction roller (11); and the guide belt (12) is corrected by adjusting the position of the movable deflection correction roller (11) on the frame device (100).

3. The cloth stabilizing conveying system according to claim 2, characterized in that: The peeling roller (7), the driving roller (3), and the driven roller (4) are arranged in sequence in the second direction, and along the height direction, the driving roller (3) and the driven roller (4) are located at the same height, and the top of the peeling roller (7) is located below the top of the driving roller (3).

4. The cloth stabilizing conveying system according to claim 1, characterized in that: The material pressing device (500) comprises a cloth pressing roller (8) and a first adjusting device (14); the cloth pressing roller (8) is located above the working surface of the guide belt (12) and elastically slides up and down under the action of the first adjusting device (14); the bottom of the cloth pressing roller (8) can be in contact with and connected to the guide belt (12), thereby being able to attach the cloth to the guide belt (12).

5. The cloth stabilizing conveying system according to claim 4, characterized in that: The material pressing device (500) comprises two second mounting brackets (16), and the two second mounting brackets (16) extend from both ends of the cloth pressing roller (8) in the length direction. The first adjustment device (14) is arranged on the second mounting brackets (16) and can drive the cloth pressing roller (8) to move up and down as a whole.

6. A printing machine, characterized in that: The printing machine comprises a cloth stabilizing conveying system as described in any one of claims 1 to 5.

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