High-precision roll-to-roll flexible electronic printing equipment

Abstract

The invention belongs to the technical field of circuit printing, and particularly relates to high-precision roll-to-roll flexible electronic printing equipment. The high-precision roll-to-roll flexible electronic printing equipment is used for printing a conductive circuit on the surface of a film material and comprises an unwinding mechanism, a transfer printing mechanism, a drying mechanism and a drawstring winding mechanism which are sequentially arranged in the conveying direction of the film material, and a to-be-processed material roll is placed on the unwinding mechanism; the unwinding mechanism is used for leading out a film material in a to-be-processed material roll to the transfer printing mechanism, the transfer printing mechanism is used for coating the surface of the film material with ink and pulling the film material to be conveyed towards the drying mechanism, the drying mechanism is used for drying the film material coated with the ink, and the drawstring winding mechanism comprises a winding structure and a pulling structure; the traction structure is used for pulling the dried film out of the drying structure and conveying the dried film towards the winding structure, and the winding structure is used for winding the film. The problem of how to improve the printing precision can be solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of conductive circuit printing, and in particular relates to a high-precision roll-to-roll flexible electronic printing equipment. Background Art

[0002] With the great progress in printing and packaging, Internet of Things, bioelectronics and brain-computer fusion, flexible electronic devices with reconfigurable functions, variable shapes and stretchable features have been widely used in high-tech fields such as intelligent communications, biomedicine, aerospace, etc., and are strategic emerging industries that are vigorously cultivated and developed in the national science and technology development plan. Flexible electronics is an electronic device made by precisely combining inorganic or organic conductive materials with soft and ductile film substrates. Unlike traditional silicon-based electronics based on rigid materials and substrates, flexible electronics can withstand certain deformations and have physical bending capabilities. Through reorganization and other methods, flexible electronic systems can achieve different performance and functions, which subversively changes the physical form of traditional electronic technology.

[0003] There have been many reports on the application of flexible printed electronic devices and theoretical discussions on printing technology, but there are few reports on the research and development of flexible electronic printing equipment as a carrier of flexible printed electronic technology, and the development is relatively lagging behind. The existing flexible printed electronic devices on the market are still far from industrial large-scale, large-area, high-precision and high-efficiency industrial production.

[0004] Considering the low manufacturing cost of gravure printing, its compatibility with flexible substrates, and its suitability for large-scale and strong compliance, the use of roll-to-roll (R2R) gravure printing technology to prepare flexible electronics is a technology with great application prospects. R2R gravure printing adopts a roll-type material collection and discharge processing method, that is, the flexible printed electronic substrate film in roll form is continuously unfolded for printing to complete the processing and manufacturing of electronic products. This roll-to-roll printing process technology can accurately transfer the circuit diagram to the surface of the unrolled flexible film unit that is transported forward under tension through the pressure transfer of conductive ink, and completes precision coating and multi-layer overprinting during the film transmission process, which enables large-scale, large-area, high-efficiency and high-precision printing preparation of flexible printed electronic films. However, in the existing roll-to-roll flexible electronic printing equipment, the film material is not stable during the transportation process due to factors such as the continuous reduction of the material roll weight, and the film material cannot maintain a stable tension, thus affecting the printing accuracy. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a high-precision roll-to-roll flexible electronic printing equipment, aiming to solve the problem of how to improve printing accuracy.

[0006] To achieve the above purpose, the technical solution adopted in this application is:

[0007] In a first aspect, a high-precision roll-to-roll flexible electronic printing equipment is provided for printing conductive circuits on the surface of a film material. The high-precision roll-to-roll flexible electronic printing equipment includes an unwinding mechanism, a transfer mechanism, a drying mechanism, and a belt winding mechanism arranged in sequence along the conveying direction of the film material. The unwinding mechanism is provided with a roll of material to be processed, and the unwinding mechanism is used to lead the film material in the roll of material to be processed to the transfer mechanism. The transfer mechanism is used to coat ink on the surface of the film material and pull the film material toward the drying mechanism for conveying. The drying mechanism is used to dry the film material coated with ink. The belt winding mechanism includes a winding structure and a traction structure. The traction structure is used to pull the dried film material out of the drying structure and convey it toward the winding structure. The winding mechanism is used to wind up the film material.

[0008] In some embodiments, the traction structure includes a traction roller and a driven roller that are spaced apart from each other and rotatable around their respective axes, the film material passes through a gap between the traction roller and the driven roller and is clamped between the traction roller and the driven roller, and the traction structure also includes a first driving member, which is used to drive the traction roller to rotate so as to pull the film material to move together with the driven roller.

[0009] In some embodiments, the high-precision roll-to-roll flexible electronic printing equipment also includes a control structure, and the belt winding mechanism also includes a tension detection structure, the tension detection structure is arranged at the upstream end of the traction structure, and the tension detection structure is used to detect the tension of the film material, the tension detection structure is communicatively connected to the control structure, and the first drive member is communicatively connected to the control structure, and the control structure is used to control the first drive member according to the tension detection structure to adjust the rotation speed of the traction roller.

[0010] In some embodiments, the transfer mechanism includes a support, a coating roller rotatably mounted on the support, a transfer roller rotatably mounted on the support, a first driving structure for driving the coating roller to rotate, and a second driving structure for driving the transfer roller to rotate, the coating roller and the transfer roller are respectively connected to the output end of the first driving structure and the output end of the second driving structure, a conveying space for the film material is formed between the roller surface of the coating roller and the roller surface of the transfer roller, a pit for filling the ink is provided on the roller surface of the coating roller, the coating roller and the transfer roller rotate in opposite directions and clamp the film material together to imprint the ink in the pit onto the surface of the film material and pull the film material forward.

[0011] In some embodiments, the control structure is used to control the coating roller, the transfer roller and the traction roller to rotate synchronously.

[0012] In some embodiments, the transfer mechanism further includes an ink scraping structure, which is disposed on the support and adjacent to the coating roller, and is used to scrape off the ink on the roller surface of the coating roller except for the pits.

[0013] In some embodiments, the high-precision roll-to-roll flexible electronic printing equipment also includes an inkjet mechanism, which is arranged between the transfer mechanism and the drying mechanism. The inkjet mechanism is used to spray ink on the surface of the film material coated with ink to reprint the printed circuit.

[0014] In some embodiments, a first tension adjustment mechanism is further provided between the unwinding mechanism and the transfer mechanism, and the film material passes through the first tension adjustment mechanism, and the first tension adjustment mechanism is used to increase or decrease the tension of the film material during the transmission process to keep the tension of the film material within a preset range.

[0015] In some embodiments, a corona mechanism is further provided between the first tension adjustment mechanism and the transfer mechanism, and the corona mechanism is used to discharge the film material to increase the roughness of the surface of the film material.

[0016] In some embodiments, the drying mechanism includes an ultraviolet light source oven, an infrared light source oven, and a constant temperature hot air oven arranged in sequence, and the film material passes through the ultraviolet light source oven, the infrared light source oven, and the constant temperature hot air oven in sequence.

[0017] The high-precision roll-to-roll flexible electronic printing equipment provided by the present application is achieved by arranging an unwinding mechanism, a transfer mechanism, a drying mechanism and a belt winding mechanism in sequence. The transfer mechanism applies ink to the film material being transmitted, the drying mechanism dries the film material coated with ink to solidify the ink, and the belt winding mechanism winds the dried film material into a roll. While ensuring the performance of the printing equipment, the transfer mechanism and the traction structure can synchronously pull the film material to keep sufficient and stable tension of the film material, thereby improving the printing accuracy of the conductive lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the high-precision roll-to-roll flexible electronic printing equipment provided in an embodiment of the present application;

[0020] Figure 2 It is a partial structural schematic diagram of a high-precision roll-to-roll flexible electronic printing equipment provided in an embodiment of the present application;

[0021] Figure 3 yes Figure 1 A structural diagram of the belt winding mechanism;

[0022] Figure 4 It is a schematic diagram of the conveying path of the film material in the drawstring winding mechanism provided in the embodiment of the present application;

[0023] Figure 5 yes Figure 3 A schematic diagram of the structure of the traction structure;

[0024] Figure 6 yes Figure 3 A schematic diagram of the structure of the tension detection structure;

[0025] Figure 7 yes Figure 3 A schematic diagram of the structure of the winding structure;

[0026] Figure 8 yes Figure 3 A schematic diagram of the structure of the roller deviation correction structure;

[0027] Fig. 9 yes Figure 1 A schematic diagram of the structure of the transfer mechanism in FIG.

[0028] Fig.10 It is a schematic diagram of the right view structure of 9;

[0029] Fig.11 It is a partial structural schematic diagram of a transfer mechanism provided in one embodiment of the present application;

[0030] Fig.12 is a partial structural schematic diagram of a transfer mechanism provided in another embodiment of the present application;

[0031] Fig.13 yes Figure 3 A schematic structural diagram of the first tension adjustment structure;

[0032] Fig.14 is a partial structural schematic diagram of a first tension adjustment structure provided in an embodiment of the present application;

[0033] Fig.15 yes Fig.14 Schematic diagram of the right view structure.

[0034] Among them, the reference numerals in the figure are:

[0035] 100, unwinding mechanism; 200, transfer mechanism; 210, support; 211, first seat; 212, second seat; 213, third seat; 214, bottom plate; 215, rotating platform; 2151, turntable; 2152, fixed block; 216, adjusting screw; 220, coating roller; 230, transfer roller; 241, first driving structure; 242, second driving structure; 243, third driving structure; 250, scraping structure; 260, ink tank; 271, first mounting seat; 272, second mounting seat; 273, fine-tuning structure; 280, Image sensor; 291, first adjustment structure; 2911, locking seat; 2912, rotating wheel; 2913, locking bolt; 2914, blocking column; 292, second adjustment structure; 300, belt winding mechanism; 310, traction structure; 311, traction roller; 312, driven roller; 313, first driving member; 314, first support frame; 3141, slide; 315, mounting block; 316, second driving member; 317, elastic member; 320, second tension adjustment mechanism; 330, tension detection structure; 331, rotating mounting seat; 33 2. Pressure sensor; 333. Induction roller; 340. Winding structure; 341. Winding roller; 3411. Inflatable joint; 342. Mounting plate; 343. Third driving member; 344. Correction motor; 345. Transmission structure; 346. Correction sensor; 347. Transition roller; 348. Synchronous wheel mechanism; 349. Connecting plate; 3491. Guide column; 361. Third support frame; 362. Cooling roller; 370. Over-roller correction structure; 371. Driving roller; 372. Edge detection sensor; 373. Fourth driving member; 374. Fourth support Support frame; 400, drying mechanism; 410, ultraviolet light source oven; 420, infrared light source oven; 430, constant temperature hot air oven; 500, first tension adjustment mechanism; 510, driving assembly; 511, driving motor; 512, magnetic powder clutch; 513, supporting seat; 520, moving roller; 541, rotating shaft; 542, traction rope; 550, conveying roller; 560, second supporting frame; 561, connecting block; 571, tension sensor; 572, displacement sensor; 600, inkjet mechanism; 700, corona mechanism; 2000, film material. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] See also Figures 1 to 15The embodiment of the present application provides a high-precision roll-to-roll flexible electronic printing equipment for printing conductive circuits on the surface of a film material 2000. The high-precision roll-to-roll flexible electronic printing equipment includes an unwinding mechanism 100, a transfer mechanism 200, a drying mechanism 400, and a belt winding mechanism 300 arranged in sequence along the conveying direction of the film material 2000. The unwinding mechanism 100 is placed with a roll of material to be processed, and the unwinding mechanism 100 is used to lead the film material 2000 in the roll of material to be processed to the transfer mechanism 200. The transfer mechanism 200 is used to coat ink on the surface of the film material 2000 and pull the film material 2000 toward the drying mechanism 400 for conveying. The drying mechanism 400 is used to dry the film material 2000 coated with ink. The belt winding mechanism 300 includes a winding structure 340 and a traction structure 310. The traction structure 310 is used to pull the dried film material 2000 out of the drying structure and convey it toward the winding structure 340. The winding mechanism is used to wind up the film material 2000.

[0041] The high-precision roll-to-roll flexible electronic printing equipment provided in the present application is achieved by sequentially arranging an unwinding mechanism 100, a transfer mechanism 200, a drying mechanism 400 and a belt winding mechanism 300. The transfer mechanism 200 applies ink to the film material 2000 being transmitted, the drying mechanism 400 dries the film material 2000 coated with ink to solidify the ink, and the belt winding mechanism 300 winds the dried film material 2000 into a roll. While ensuring the performance of the printing equipment, the transfer mechanism 200 and the traction structure 310 can synchronously pull the film material 2000 to keep the film material 2000 with sufficient and stable tension, thereby improving the printing accuracy of the conductive lines.

[0042] Furthermore, if Figure 5 As shown, the traction structure 310 includes a traction roller 311 and a driven roller 312 which are spaced apart from each other and can rotate around their respective axes. The film material 2000 passes through the gap between the traction roller 311 and the driven roller 312 and is clamped between the traction roller 311 and the driven roller 312. The traction structure 310 also includes a first driving member 313, which is used to drive the traction roller 311 to rotate so as to pull the film material 2000 to move together with the driven roller 312.

[0043] It can be understood that the traction roller 311 and the driven roller 312 are both cylindrical structures. When the film material 2000 passes through the gap between the traction roller 311 and the driven roller 312, the outer peripheral walls of the traction roller 311 and the driven roller 312 contact the film material 2000, the traction roller 311 actively rotates, and the driven roller 312 passively rotates, and the traction roller 311 and the driven roller 312 jointly drive the film material 2000 to be transported forward. Specifically, in the present application, the rotation axis 541 line of the traction roller 311 and the rotation axis 541 line of the driven roller 312 are parallel to each other.

[0044] In some embodiments, the traction structure 310 also includes a first support frame 314, a mounting block 315 and a second driving member 316, the traction roller 311 is rotatably mounted on the first support frame 314, the driven roller 312 is rotatably mounted on the mounting block 315, the mounting block 315 is slidably connected to the first support frame 314, and the output end of the second driving member 316 is connected to the mounting block 315 to drive the mounting block 315 and the driven roller 312 to move toward or away from the traction roller 311.

[0045] In this embodiment, the driven roller 312 is arranged directly below the traction roller 311, and the second driving member 316 drives the mounting block 315 and the driven roller 312 to move toward or away from the traction roller 311, that is, the second driving member 316 drives the mounting block 315 and the driven roller 312 to move up and down in the vertical direction. Specifically, there are two mounting blocks 315, and both ends of the driven roller 312 are rotatably mounted in the two mounting blocks 315, respectively.

[0046] In some embodiments, a slide groove 3141 is provided on the first support frame 314, and the extension direction of the slide groove 3141 is arranged in the same direction as the moving direction of the driven roller 312, that is, in this embodiment, the slide groove 3141 extends up and down along the vertical direction. Further, the mounting block 315 is slidably connected to the inner wall of the slide groove 3141. It can be understood that the two opposite outer walls of the mounting block 315 are slidably connected to the two opposite inner walls of the slide groove 3141, so that the mounting block 315 moves smoothly and does not deviate. Specifically, the slide groove 3141 of the present application runs through the side wall of the first support frame 314.

[0047] Furthermore, an elastic member 317 is connected between the first support frame 314 and the mounting block 315. The elastic member 317 is arranged on the moving path of the mounting block 315. By setting the elasticity, it can play a buffering role to prevent the mounting block 315 and the driven roller 312 from excessive movement, thereby increasing the force between the driven roller 312 and the traction roller 311, causing the film material 2000 to be damaged or crushed.

[0048] The high-precision roll-to-roll flexible electronic printing equipment also includes a control structure, and the belt winding mechanism 300 also includes a tension detection structure 330. The tension detection structure 330 is arranged at the upstream end of the traction structure 310. The tension detection structure 330 is used to detect the tension of the film material 2000. The tension detection structure 330 is communicated with the control structure, and the first drive member 313 is communicated with the control structure. The control structure is used to control the first drive member 313 according to the tension detection structure 330 to adjust the rotation speed of the traction roller 311.

[0049] It can be understood that after the film material 2000 is heated by the drying unit, under the influence of gravity, tension, temperature, etc., the film material 2000 will shrink or stretch to a certain extent as a whole. This phenomenon will cause the film material 2000 to be very tight or too loose. By setting up a tension detection structure 330, the tightness of the film material 2000 can be judged based on the tension signal detected by the tension detection structure 330, thereby controlling the differential movement of the traction roller 311 to compensate for the difference in the front and rear travel, so that the traction structure 310 can pull the film material 2000 with a preset traction force.

[0050] Specifically, when the tension detection structure 330 performs real-time detection on the tension of the film material 2000, when the tension detection structure 330 detects that the current tension of the film material 2000 is too large, it immediately feeds back a signal to the control structure, and the controller outputs an instruction to the first drive member 313, and the first drive member 313 drives the traction roller 311 to slow down its rotation speed, thereby lowering the tension of the film material 2000 to a preset range; or when the tension detection structure 330 detects that the current tension of the film material 2000 is too small, it immediately feeds back a signal to the control structure, and the controller outputs an instruction to the first drive member 313, and the first drive member 313 drives the traction roller 311 to speed up its rotation speed, thereby realizing closed-loop constant tension control.

[0051] Furthermore, if Figure 6 As shown, the tension detection structure 330 includes a rotating mounting seat 331, a pressure sensor 332 and a sensing roller 333. The sensing roller 333 is rotatably mounted on the rotating mounting seat 331. The film material 2000 is wound around the top surface of the sensing roller 333. Therefore, the film material 2000 applies a downward pressure to the top surface of the sensing roller 333. The rotating mounting seat 331 is set on the top surface of the pressure sensor 332 and presses the pressure sensor 332 downward. Therefore, the pressure sensor 332 can obtain the tension of the film material 2000 by detecting the pressure exerted by the rotating mounting seat 331.

[0052] In some embodiments, the drawstring winding mechanism 300 further includes a third support frame 361 and a cooling roller 362, the cooling roller 362 is rotatably mounted on the third support frame 361, the third support frame 361 and the cooling roller 362 are arranged at the upstream end of the tension detection structure 330, the film material 2000 is wrapped around the cooling roller 362, and the cooling roller 362 can cool the film material 2000 after the film material 2000 is baked at high temperature. It can be understood that a cooling water circuit can be arranged inside the cooling roller 362, and the heat exchange of the cooling water in the cooling water circuit can maintain a low roller surface temperature of the cooling roller 362, and since the film material 2000 is in contact with the roller surface of the cooling roller 362, the temperature of the film material 2000 can be reduced.

[0053] like Figures 9 to 11As shown, the transfer mechanism 200 includes a support 210, a coating roller 220 rotatably mounted on the support 210, a transfer roller 230 rotatably mounted on the support 210, a first driving structure 241 for driving the coating roller 220 to rotate, and a second driving structure 242 for driving the transfer roller 230 to rotate. The coating roller 220 and the transfer roller 230 are respectively connected to the output end of the first driving structure 241 and the output end of the second driving structure 242. A conveying space for the film material 2000 is formed between the roller surface of the coating roller 220 and the roller surface of the transfer roller 230. A pit for filling ink is provided on the roller surface of the coating roller 220. The coating roller 220 and the transfer roller 230 rotate in opposite directions and clamp the film material 2000 together to imprint the ink in the pit onto the surface of the film material 2000 and pull the film material 2000 forward.

[0054] The coating roller 220 and the transfer roller 230 rotate synchronously and clamp the film material 2000, so that the ink in the pits can be gradually pressed onto the surface of the film material 2000 along the length direction of the film material 2000 at the tangential position of the coating roller 220 and the transfer roller 230, and because the rotation directions of the coating roller 220 and the transfer roller 230 are arranged in opposite directions, the rotational friction between the coating roller 220 and the film material 2000 can be effectively reduced, and the resistance to the transportation of the film material 2000 can be effectively reduced, thereby improving the printing effect of the transfer device; and the use of gravure printing can improve printing accuracy.

[0055] It can be understood that the coating roller 220 and the transfer roller 230 rotate in opposite directions, that is, the coating roller 220 rotates in the counterclockwise direction, and the transfer roller 230 rotates in the clockwise direction, and the extension direction of the coating roller 220 is parallel to the extension direction of the transfer roller 230. In addition, in the embodiment of the present application, the first driving structure 241 and the second driving structure 242 are both servo motors.

[0056] Specifically, the present application selects ink with a fineness of less than 5 um and a viscosity of less than 70S as the experimental slurry, and uses a release film as the printing substrate.

[0057] In the present application, the control structure is used to control the synchronous rotation of the coating roller 220, the transfer roller 230 and the traction roller 311, so as to ensure the smooth operation and stable tension of the film material 2000, so that the precision of the printed lines is stable without pulling deformation.

[0058] In some embodiments, the transfer mechanism 200 further includes an ink scraping structure 250, which is disposed on the support 210 and adjacent to the coating roller 220, and is used to scrape off the ink on the roller surface of the coating roller 220 except for the pits. It can be understood that only the ink in the pits is related to the shape of the printed circuit, and the roller surface of the coating roller 220 except for the pits may also have ink, so by scraping off the roller surface of the coating roller 220 with the ink scraping structure 250, the excess ink on the roller surface can be scraped off without affecting the ink in the pits, and only the ink in the pits is retained.

[0059] In some embodiments, the transfer mechanism 200 further includes an ink tank 260, which is disposed on the support 210. Ink is stored in the ink tank 260. During the rotation of the coating roller 220, the roller surface of the coating roller 220 facing the ink tank 260 is immersed in the ink, so that the ink in the ink tank 260 is filled into the pit. By providing the ink tank 260, the coating roller 220 can attach the ink to the coating roller 220 during the rotation process, and the structure becomes simple and the volume is smaller. Moreover, since the pits on the roller surface of the coating roller 220 can be completely immersed in the ink, it can effectively ensure that the pits are completely filled with ink, thereby improving the transfer effect. In addition, the provision of the ink tank 260 makes debugging and maintenance more convenient.

[0060] In other possible embodiments, an ink pump may be provided to allow the ink to adhere to the coating roller 220 by spraying ink, or an ink roller immersed in the ink tank 260 may transfer the ink to the coating roller 220. The present application does not impose a sole limitation on the manner in which the coating roller 220 obtains the ink.

[0061] In some embodiments, the high-precision roll-to-roll flexible electronic printing equipment further includes an inkjet mechanism 600, which is disposed between the transfer mechanism 200 and the drying mechanism 400. The inkjet mechanism 600 is used to spray ink on the surface of the film material 2000 coated with ink, and to reprint the printed circuit, thereby improving the printing effect. Preferably, the inkjet mechanism 600 of the present application is an electro-hydrodynamic inkjet structure, the basic principle of which is to use an externally applied electric field to pull out the liquid ink instead of pushing it out of a small-sized nozzle. This printing method can improve the resolution of the printed pattern. Specifically, the resolution of the obtained pattern is higher than 1 μm.

[0062] The present application performs gravure printing and inkjet printing through a transfer mechanism 200 and an inkjet mechanism 600, with a printing thickness of 1um to 19um (accuracy within 100mm of line length), a large-size printing accuracy of 2um to 20um (accuracy within 100mm of line length), and achieves local high-precision printing of 0.2um to 4um, and the multi-layer electronic overprinting error is controlled within 20um (accuracy within 100mm of line length).

[0063] In some embodiments, Figure 2 As shown, a first tension adjusting mechanism 500 is also provided between the unwinding mechanism 100 and the transfer mechanism 200. The film material 2000 passes through the first tension adjusting mechanism 500. The first tension adjusting mechanism 500 is used to increase or decrease the tension of the film material 2000 during the transmission process to keep the tension of the film material 2000 within a preset range.

[0064] Specifically, Figures 13 to 15 As shown, the first tension adjustment structure includes a moving roller 520 slidably arranged on the conveying path of the film material 2000, a driving component 510 for driving the moving roller 520 to move along a preset direction, and a tension sensor 571 for detecting the tension of the film material 2000. The film material 2000 is wrapped around the moving roller 520, and the moving roller 520 is connected to the output end of the driving component 510. The tension sensor 571 is arranged on the moving roller 520. The control structure is communicatively connected with the tension sensor 571 to control the driving component 510 according to the tension sensor 571. The driving component 510 drives the moving roller 520 to move along the first direction a or the second direction b so that the tension of the film material 2000 is maintained within a preset range. The first direction a and the second direction b are opposite directions.

[0065] The tension sensor 571 can detect the tension of the film material 2000 in real time during the conveying process of the film material 2000. When it is detected that the tension of the film material 2000 changes, the tension sensor 571 transmits the tension change signal to the control structure, and the control structure sends an instruction to the drive component 510. The drive component 510 drives the movable roller 520 to move along the first direction a or the second direction b. In this way, the tension of the film material 2000 can be dynamically adjusted, so that the tension of the film material 2000 is reduced or increased to a preset range, effectively eliminating the fluctuation of the tension, and keeping the tension constant, thereby improving the accuracy of printing the conductive circuit.

[0066] It can be understood that when the tension sensor 571 performs real-time detection of the tension of the film material 2000, when the tension sensor 571 detects that the current tension of the film material 2000 is too large, it immediately feeds back a signal to the control structure, and the controller outputs an instruction to the drive component 510, and the drive component 510 drives the movable roller 520 to move along the first direction a, thereby lowering the tension of the film material 2000 to a preset range; or when the tension sensor 571 detects that the current tension of the film material 2000 is too small, it immediately feeds back a signal to the control structure, and the controller outputs an instruction to the drive component 510, and the drive component 510 drives the movable roller 520 to move along the second direction b, thereby increasing the tension of the film material 2000 to a preset range, thereby realizing closed-loop constant tension control. It should be noted that through the regulating effect of the high-precision roll-to-roll flexible electronic printing equipment of the present application, the tension of the film material 2000 fluctuates within the range of 1%, that is, the difference between the maximum tension of the film material 2000 and the preset tension value will not exceed 1% of the preset tension value, and the difference between the minimum tension of the film material 2000 and the preset tension value will not exceed 1% of the preset tension value.

[0067] In some embodiments, the first tension adjustment mechanism 500 further includes a traction rope 542 and a rotating shaft 541, wherein the rotating shaft 541 is connected to the output end of the driving assembly 510, one end of the traction rope 542 is fixed around the outer circumference of the rotating shaft 541, and the other end of the traction rope 542 is connected to the moving roller 520, and the rotating shaft 541 can rotate around its rotating shaft 541 line to drive the traction rope 542 to pull the moving roller 520 to move along a preset direction. By setting the traction rope 542 to pull the moving roller 520 to move, since the traction rope 542 occupies a small space, the structure of the pull belt winding device can be simplified, which is conducive to miniaturization. Optionally, the traction rope 542 can be a steel wire or a fishing line.

[0068] In some embodiments, the driving assembly 510 includes a magnetic powder clutch 512 and a driving motor 511, the power input end of the magnetic powder clutch 512 is connected to the driving shaft of the driving motor 511, and the power output end of the magnetic powder clutch 512 is connected to the rotating shaft 541. Preferably, the clutch is a magnetic powder clutch 512, and the power output of the magnetic powder clutch 512 can be constant by setting the magnetic powder clutch 512, so that the tension of the traction rope 542 is constant, and the magnetic powder clutch 512 can achieve high-precision power output. The magnetic powder clutch 512 is based on the electromagnetic principle and uses magnetic powder to transmit torque. By controlling the input current, the purpose of changing the output torque can be achieved, and the torque is proportional to the excitation current within the specified torque range, and can be used as a linear adjustment element. When the coil is not energized, the input shaft rotates, and the magnetic powder is pressed against the inner wall of the clamp ring under the action of centrifugal force, and the output shaft has no contact with the input shaft. At this time, it is in an idling state; when the coil is energized, the magnetic powder generates magnetic flux under the action of magnetic lines of force, so that the output shaft and the input shaft become a rigid body and rotate. At this time, it is in a working state, thereby achieving the purpose of transmitting torque. The magnetic powder clutch 512 has the advantages of high linearity and high precision torque control, and because the size of the torque depends only on the size of the exciting current, the output torque is constant, and it has the advantages of fast response speed, simple structure, no pollution, no noise, no impact vibration, and energy saving.

[0069] In the present application, the first tension adjustment structure also includes a support seat 513, a rotating shaft 541 is mounted on the support seat 513, and the rotating shaft 541 is rotatably connected to the support seat 513. Optionally, the driving motor 511 is a servo motor. In some embodiments, the first tension adjustment structure also includes a second support frame 560, the moving roller 520 is mounted on the second support frame 560, and the second support frame 560 is provided with a connecting block 561 near one end of the rotating shaft 541, the traction rope 542 is connected to the connecting block 561, and the axial direction of the moving roller 520 intersects with the extension direction of the traction rope 542. Specifically, the axial direction of the moving roller 520 and the extension direction of the traction rope 542 are perpendicular to each other.

[0070] In some embodiments, the tension sensor 571 is installed on the connecting block 561, and the traction rope 542 passes through the tension sensor 571 and is connected to the connecting block 561. The tension sensor 571 is used to detect the tension of the traction rope 542. When the traction rope 542 pulls the supporting frame, the traction force on the film material 2000 and the tension of the traction rope 542 are in a balanced state. Therefore, by detecting the tension of the traction rope 542, the tension of the film material 2000 can be obtained. When the tension of the film material 2000 changes instantaneously, the tension of the traction rope 542 will also change.

[0071] The first tension adjustment structure also includes a displacement sensor 572, which is used to detect the position of the moving roller 520. The displacement sensor 572 is connected to the control structure for communication. The control structure controls the unwinding structure according to the displacement sensor 572 to adjust the unwinding speed of the unwinding structure. The displacement of the moving roller 520 is sensed by the displacement sensor 572, and the displacement signal is transmitted to the control structure. The displacement sensed by the displacement sensor 572 is compared with the displacement setting value to form a closed-loop control; the control structure sends instructions to the unwinding mechanism 100 to control the unwinding mechanism 100 to speed up or slow down the unwinding speed, thereby adjusting the feeding amount of the film material 2000, which can effectively adjust the tension to be constant.

[0072] It can be understood that the displacement sensor 572 can limit the movement stroke of the moving roller 520 by detecting the position of the moving roller 520, thereby preventing the moving roller 520 from excessively moving. Optionally, the displacement sensor 572 is a linear potentiometer.

[0073] In some embodiments, the first tension adjustment structure also includes a sensor amplifier, which is communicatively connected to the tension sensor 571, and the sensor amplifier is used to amplify the sensor signal of the tension sensor 571, so as to avoid affecting the normal operation of the tension sensor 571 due to the weak sensor signal of the tension sensor 571.

[0074] In some embodiments, a corona mechanism 700 is further disposed between the first tension adjustment mechanism 500 and the transfer mechanism 200 , and the corona mechanism 700 is used to discharge the film material 2000 to increase the roughness of the surface of the film material 2000 .

[0075] It should be noted that most plastic films (such as polyolefin films) are non-polar polymers with low surface tension, generally 29mN / m to 30mN / m. Theoretically, if the surface tension of an object is lower than 33mN / m, known inks and adhesives cannot adhere firmly to it, so the surface should be treated by corona method. The present application applies high-frequency and high-voltage electricity through the corona mechanism 700 to generate high-frequency and high-voltage discharge, and produce small and dense purple-blue sparks. Various ions generated after air ionization accelerate and impact the plastic film in the treatment device under the action of a strong electric field, breaking the chemical bonds of the plastic molecules and degrading them, thereby increasing the surface roughness and surface area; and a large amount of ozone is also generated during discharge. Ozone is a strong oxidant that can oxidize plastic molecules to produce carbonyl and peroxide groups with strong polarity, thereby increasing their surface energy.

[0076] Preferably, the drying mechanism 400 includes an ultraviolet light oven 410, an infrared light oven 420 and a constant temperature hot air oven 430 which are arranged in sequence, and the film material 2000 passes through the ultraviolet light oven 410, the infrared light oven 420 and the constant temperature hot air oven 430 in sequence. Since the ink has fluidity, when the ink is attached to the surface of the film material 2000, the flow and infiltration of the ink will affect the line width and line spacing, thereby affecting the printing effect, and the ultraviolet light oven 410 irradiates the ultraviolet light source, which can quickly solidify and shape the ink surface, which is conducive to maintaining the lines; and since the infrared light wavelength is relatively long and easy to penetrate, the infrared light oven 420 is arranged to irradiate the infrared light source, which is conducive to solidifying the printed lines on the film; the constant temperature hot air oven 430 can evenly solidify the ink material, prevent cracking and disconnection, maintain the consistency of the line material, and maintain the electrical parameters of the material.

[0077] In some embodiments, the transfer device includes a first mounting seat 271 slidably disposed on the support 210, and the coating roller 220 is disposed on the first mounting seat 271. The transfer device also includes a third driving structure 243. The first mounting seat 271 is connected to the output end of the third driving structure 243. The third driving structure 243 is used to drive the mounting seat to move along a third direction c. The third direction c is parallel to the extension direction of the coating roller 220 and the transfer roller 230. Therefore, by setting the third driving structure 243, the relative positions of the coating roller 220 and the transfer roller 230 along the third direction c can be adjusted.

[0078] Furthermore, the transfer device also includes an image sensor 280, which is communicatively connected to the control structure, and the third drive structure 243 is communicatively connected to the control structure. The control structure is used to control the third drive structure 243 according to the image sensor 280, and the image sensor 280 is used to collect the image of the film material 2000 to monitor the printing condition of the film material 2000.

[0079] It is understandable that the transfer device usually needs to perform overprinting, which means that a second printing is performed on the basis of the first printing, and the lines of the second printing are overlapped on the lines of the first printing, and the position deviation of the two printed lines affects the overprinting accuracy. In order to ensure the accuracy of overprinting, the present application sets an image sensor 280 for real-time monitoring. The image sensor 280 monitors the trend of the line in real time. By presetting the monitored line position or MARK point, if there is a deviation in overprinting, the image sensor 280 can calculate the position offset and transmit the signal to the control structure. The control structure sends an instruction to the third drive structure 243. The third drive structure 243 responds and drives the coating roller 220 to move along the third direction c, so that the position of the coating roller 220 is accurate, thereby improving the accuracy of transfer.

[0080] In some embodiments, the transfer device also includes a fine-tuning structure 273 and a second mounting seat 272, the support 210 includes a base plate 214, the second mounting seat 272 is slidably connected to the top surface of the base plate 214, the first mounting seat 271 is slidably connected to the top surface of the second mounting seat 272, the fine-tuning structure 273 is set on the base plate 214, the fine-tuning structure 273 is used to drive the second mounting seat 272 to move along the fourth direction d so that the coating roller 220 is close to or away from the transfer roller 230, and the fourth direction d is perpendicular to the third direction c.

[0081] The gap between the coating roller 220 and the transfer roller 230 can be adjusted by the fine-tuning structure 273. For example, when the gap between the coating roller 220 and the transfer roller 230 is large, the coating roller 220 is moved closer to the transfer roller 230 by the fine-tuning structure 273, thereby reducing the gap between the coating roller 220 and the transfer roller 230 to avoid the gap being too small to affect the transfer effect.

[0082] Optionally, the fine-tuning structure 273 can be a fine-tuning handle, and the fine-tuning handle is connected to a contact rod, which contacts the side of the second mounting seat 272. By rotating the fine-tuning handle, the contact rod can move forward and push the second mounting seat 272 forward.

[0083] In some embodiments, the support 210 includes a first base body 211, a first driving structure 241 is fixed on the first base body 211, a rotating platform 215 is rotatably provided on the first base body 211, and the rotating platform 215 is connected to the rotating output shaft of the first driving structure 241. The transfer device also includes an adjusting screw 216, the adjusting screw 216 passes through the rotating platform 215, one end of the adjusting screw 216 extends out of the first base body 211, and the other end of the adjusting screw 216 extends toward the coating roller 220. The adjusting screw 216 is threadedly connected to the rotating platform 215 so that the adjusting screw 216 is locked or separated from one end of the coating roller 220, and the extension direction of the adjusting screw 216 is parallel to the extension direction of the rotating output shaft. When the adjusting screw 216 is locked with one end of the coating roller 220, the first driving structure 241 drives the rotating platform 215 to rotate, and the rotating platform 215 drives the adjusting screw 216 to rotate, thereby driving the coating roller 220 to rotate synchronously.

[0084] In actual use, the adjusting screw 216 can be separated from the coating roller 220 by screwing the adjusting screw 216, and the adjusting screw 216 can be screwed out of the rotating platform 215, at which time the coating roller 220 can be removed. When installing, the adjusting screw 216 only needs to be screwed and locked with the rotating platform 215 and the coating roller 220 to complete the installation. The installation process is simple and easy to operate, and there is no need to disassemble a large number of parts. The replacement efficiency is high, which is conducive to improving production efficiency. In addition, since the extension direction of the adjusting screw 216 is parallel to the extension direction of the rotating output shaft, one end of the adjusting screw 216 can extend out of the first seat body 211 and will not be interfered by the first driving structure 241, which is convenient for operators to adjust the adjusting screw 216.

[0085] It can be understood that, since the transfer roller 230 does not need to be replaced frequently, the second driving structure 242 can be directly connected to the transfer roller 230 , which is more convenient to design and install.

[0086] In some embodiments, the support 210 also includes a second seat body 212 spaced apart from the first seat body 211, the coating roller 220 is arranged between the first seat body 211 and the second seat body 212, and the other end of the coating roller 220 is rotatably connected to the second seat body 212, and the transfer device also includes a first adjustment structure 291 and a second adjustment structure 292 respectively arranged on the first seat body 211 and the second seat body 212, the first adjustment structure 291 is used to adjust the position of one end of the coating roller 220 relative to the first seat body 211, and the second adjustment structure 292 is used to adjust the position of the other end of the coating roller 220 relative to the second seat body 212, so that the first adjustment structure 291 and the second adjustment structure 292 cooperate with each other to fine-tune the coating roller 220, thereby adjusting the parallelism of the coating roller 220 and the transfer roller 230.

[0087] In some embodiments, the rotating platform 215 includes a turntable 2151 rotatably connected to the first seat body 211 and a fixed block 2152 arranged on the side of the turntable 2151 facing the coating roller 220, the fixed block 2152 can move on the surface of the turntable 2151, the first adjustment structure 291 is adjacent to the fixed block 2152, the first adjustment structure 291 includes a locking seat 2911, a rotating wheel 2912, a locking bolt 2913 and a blocking column 2914, the rotating wheel 2912 is rotatably arranged on the side of the locking seat 2911 close to the fixed block 2152, the rotating wheel 2912 is in contact with the fixed block 2152, the locking bolt 2913 is movably connected to the locking seat 2911, and the locking bolt 2913 is used to lock or unlock the rotating wheel 2912 so that the rotating wheel 2912 abuts against the blocking and clamping fixed block 2152, or the rotating wheel 2912 is rollingly connected to the fixed block 2152.

[0088] Specifically, there are two groups of first adjustment structures 291, and there are two groups of blocking columns 2914. The fixed block 2152 is a long block structure. The two groups of first adjustment structures 291 are respectively arranged on the upper and lower sides of the fixed block 2152, and the two groups of first adjustment structures 291 are respectively arranged at both ends of the fixed block 2152. When the locking bolt 2913 unlocks the rotating wheel 2912, the fixed block 2152 is rollingly connected with the two rotating wheels 2912, and the fixed block 2152 can move left and right between the two groups of first adjustment structures 291, so as to fine-tune the position of one end of the coating roller 220; and when the locking bolt 2913 locks the rotating wheel 2912, the two rotating wheels 2912 are stuck and no longer rotate, and the rotating wheels 2912 and blocking columns 2914 corresponding to the two sides of the fixed block 2152 jointly clamp the fixed block 2152, and the fixed block 2152 is locked and cannot move left and right.

[0089] In addition, the support 210 further includes a third seat body 213, which is disposed between the first seat body 211 and the second seat body 212. The adjusting screw 216 sequentially passes through the first seat body 211 and the third seat body 213 and is connected to the coating roller 220. The third seat body 213 can support the adjusting screw 216. In addition, a bearing can be disposed on the third seat body 213, and the bearing sleeve is disposed on the adjusting screw 216, which can improve the smoothness of the rotation of the adjusting screw 216.

[0090] In some embodiments, the winding structure 340 includes a winding roller 341, a mounting plate 342 and a third driving member 343. The winding roller 341 is rotatably connected to the mounting plate 342. The extension direction of the winding roller 341 is perpendicular to the plate surface of the mounting plate 342. The winding roller 341 is used for winding the film material 2000. The rotation of the winding roller 341 can drive the film material 2000 to gradually wind up to form a material roll. The winding roller 341 is connected to the output end of the third driving member 343, and the third driving member 343 is communicatively connected to the control structure.

[0091] Preferably, the winding roller 341 of the present application is an air-expanding shaft, and the air-expanding shaft is connected to an air-inflating joint 3411, and the air-expanding shaft can be inflated through the air-inflating joint 3411. The air-expanding shaft can change the shaft diameter according to the amount of inflation, thereby adjusting the tightness between the winding roller 341 and the material roll, and then can flexibly and conveniently adjust the rotational friction between the winding roller 341 and the material roll, which is convenient for winding. In addition, in this embodiment, a synchronous wheel mechanism 348 is connected between the third driving member 343 and the winding roller 341, and the transmission direction of the output power of the third driving member 343 can be changed through the synchronous wheel mechanism 348, thereby adjusting the position of the third driving member 343, so that one end of the winding roller 341 passes through the driven wheel of the synchronous wheel mechanism 348 and is exposed, so that it is convenient for the air-inflating shaft to be inflated by the air-inflating joint 3411.

[0092] In some embodiments, the winding structure 340 also includes a correction motor 344, a transmission structure 345 and a correction sensor 346. The transmission structure 345 is connected to the output end of the correction electrode, and the transmission structure 345 is connected to the mounting plate 342. The transmission structure 345 is used to transmit the power of the correction motor 344 to the mounting plate 342 to drive the mounting plate 342 to move along the extension direction of the winding roller 341. The correction sensor 346 is installed on the mounting plate 342. The correction sensor 346 is used to detect the position of the film material 2000. The correction sensor 346 and the correction motor 344 are communicated with the control structure.

[0093] Optionally, the transmission structure 345 is a screw-nut mechanism, and the winding structure 340 further includes a connecting plate 349, which is connected to the mounting plate 342. The connecting plate 349 is connected to the output end of the deviation correction motor 344 through the screw-nut mechanism, and the screw-nut mechanism can convert the rotational motion of the output shaft of the deviation correction motor 344 into the linear motion of the connecting plate 349 and the mounting plate 342, thereby driving the winding roller 341 to move in a straight line. Furthermore, a guide column 3491 is also connected between the connecting plate 349 and the mounting plate 342, and the guide column 3491 can guide the movement of the mounting plate 342 to prevent the mounting plate 342 from deflecting.

[0094] The position deviation of the moving roller 520 is sensed by the correction sensor 346, and the position deviation signal is transmitted to the control structure. The position deviation sensed by the correction sensor 346 is compared with the position deviation set value to form a closed-loop control; the control structure sends a command to the correction motor 344 to control the correction motor 344 to drive the winding roller 341 to move along its extension direction, so that the edge of the film material 2000 is flush.

[0095] It can be understood that the film material 2000 in the present application includes two opposite long sides, and the two long sides are parallel to the conveying chain path of the film material 2000. The edge of the film material 2000 in the present application is flush, which means that the two long sides of the film material 2000 are perpendicular to the extension direction of the winding roller 341. Optionally, the deviation correction sensor 346 is an ultrasonic sensor.

[0096] In addition, in the present application, the unwinding mechanism 100 and the winding structure 340 can be configured to have the same structure.

[0097] Since the edge of the film material 2000 will be offset and uneven after passing through the drying unit, a roller correction structure 370 is also provided between the traction structure 310 and the tension adjustment structure of the present application, and the film material 2000 passes through the roller correction structure 370, and the roller correction structure 370 is used to adjust the edge of the film material 2000 to be even. In addition, the present application also has a roller correction structure 370 at the upstream end of the transfer mechanism 200, and the roller correction structure 370 corrects the edge of the film material 2000 before the film enters the transfer mechanism 200, so that the edge of the film material 2000 enters the transfer mechanism 200 with the most accurate edge alignment.

[0098] Specifically, the roller deviation correction structure 370 includes a driving roller 371, an edge detection sensor 372, a fourth driving member 373 and a fourth support frame 374. The driving roller 371 is rotatably connected to the fourth support frame 374, and the fourth support frame 374 is connected to the rotation output end of the fourth driving member 373. The film material 2000 is wrapped around the driving roller 371. Specifically, the number of driving rollers 371 is set to two, and the film material 2000 is wrapped around the two driving rollers 371 respectively. Specifically, the edge detection sensor 372 is an ultrasonic sensor, which can achieve a detection accuracy of 0.01mm.

[0099] The above are only optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A high-precision roll-to-roll flexible electronic printing equipment for printing conductive circuits on the surface of a film material (2000), characterized in that: The high-precision roll-to-roll flexible electronic printing equipment comprises an unwinding mechanism (100), a transfer mechanism (200), a drying mechanism (400) and a belt rewinding mechanism (300) which are sequentially arranged along the conveying direction of the film material (2000), wherein the unwinding mechanism (100) is provided with a roll of material to be processed, the unwinding mechanism (100) is used to lead the film material (2000) in the roll of material to be processed to the transfer mechanism (200), and the transfer mechanism (200) is used to The film material (2000) is coated with ink and pulled toward the drying mechanism (400), wherein the drying mechanism (400) is used to dry the film material (2000) coated with ink, and the pull belt winding mechanism (300) includes a winding structure (340) and a pulling structure (310), wherein the pulling structure (310) is used to pull the dried film material (2000) out of the drying mechanism (400) and transport it toward the winding structure (340), and the winding mechanism is used to wind up the film material (2000).

2. The high-precision roll-to-roll flexible electronic printing equipment according to claim 1, characterized in that: The traction structure (310) includes a traction roller (311) and a driven roller (312) which are spaced apart from each other and rotatable around their respective axes. The film material (2000) passes through the gap between the traction roller (311) and the driven roller (312) and is clamped between the traction roller (311) and the driven roller (312). The traction structure (310) also includes a first driving member (313) which is used to drive the traction roller (311) to rotate so as to pull the film material (2000) to move together with the driven roller (312).

3. The high-precision roll-to-roll flexible electronic printing equipment according to claim 2, characterized in that: The high-precision roll-to-roll flexible electronic printing equipment also includes a control structure, and the tape winding mechanism (300) also includes a tension detection structure (330). The tension detection structure (330) is arranged at the upstream end of the traction structure (310), and the tension detection structure (330) is used to detect the tension of the film material (2000). The tension detection structure (330) is communicatively connected to the control structure, and the first driving member (313) is communicatively connected to the control structure. The control structure is used to control the first driving member (313) according to the tension detection structure (330) to adjust the rotation speed of the traction roller (311).

4. The high-precision roll-to-roll flexible electronic printing equipment according to claim 3, characterized in that: The transfer mechanism (200) comprises a support (210), a coating roller (220) rotatably mounted on the support (210), a transfer roller (230) rotatably mounted on the support (210), a first driving structure (241) for driving the coating roller (220) to rotate, and a second driving structure (242) for driving the transfer roller (230) to rotate, wherein the coating roller (220) and the transfer roller (230) are respectively connected to the output end of the first driving structure (241) and the output end of the second driving structure (242). The output end of the structure (242) is connected, and a conveying space for the film material (2000) is formed between the roller surface of the coating roller (220) and the roller surface of the transfer roller (230). A pit for filling the ink is arranged on the roller surface of the coating roller (220). The coating roller (220) and the transfer roller (230) rotate in opposite directions and clamp the film material (2000) together to press the ink in the pit onto the surface of the film material (2000) and pull the film material (2000) forward.

5. The high-precision roll-to-roll flexible electronic printing equipment according to claim 4, characterized in that: The control structure is used to control the coating roller (220), the transfer roller (230) and the traction roller (311) to rotate synchronously.

6. The high-precision roll-to-roll flexible electronic printing equipment according to claim 4, characterized in that: The transfer mechanism (200) further comprises an ink scraping structure (250), wherein the ink scraping structure (250) is arranged on the support (210) and is adjacent to the coating roller (220), and the ink scraping structure (250) is used to scrape off the ink on the roller surface of the coating roller (220) except for the pits.

7. The high-precision roll-to-roll flexible electronic printing equipment according to claim 1, characterized in that: The high-precision roll-to-roll flexible electronic printing equipment also includes an inkjet mechanism (600), which is arranged between the transfer mechanism (200) and the drying mechanism (400). The inkjet mechanism (600) is used to spray ink on the surface of the film material (2000) coated with ink to reprint the printed circuit.

8. The high-precision roll-to-roll flexible electronic printing equipment according to any one of claims 3 to 6, characterized in that: A first tension adjustment mechanism (500) is also provided between the unwinding mechanism (100) and the transfer mechanism (200), and the film material (2000) passes through the first tension adjustment mechanism (500). The first tension adjustment mechanism (500) is used to increase or decrease the tension of the film material (2000) during the transmission process, so as to keep the tension of the film material (2000) within a preset range.

9. The high-precision roll-to-roll flexible electronic printing equipment according to claim 8, characterized in that: A corona mechanism (700) is also provided between the first tension adjustment mechanism (500) and the transfer mechanism (200), and the corona mechanism (700) is used to discharge the film material (2000) so as to increase the roughness of the surface of the film material (2000).

10. The high-precision roll-to-roll flexible electronic printing equipment according to any one of claims 1 to 9, characterized in that: The drying mechanism (400) comprises an ultraviolet light oven (410), an infrared light oven (420) and a constant temperature hot air oven (430) which are arranged in sequence, and the film material (2000) passes through the ultraviolet light oven (410), the infrared light oven (420) and the constant temperature hot air oven (430) in sequence.

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