A precision coating device for anti-glare high ductility light box cloth processing

Abstract

This invention relates to a precision coating equipment for processing anti-glare, high-strength lightbox fabric, specifically in the field of lightbox fabric surface coating technology. The equipment is based on a mounting platform and equipped with a dust-free coating chamber. Symmetrical unwinding and rewinding units are arranged on both sides of the chamber, integrating tension adjustment and deviation correction guiding structures to ensure stable fabric transport. Inside the dust-free coating chamber, substrate pretreatment, preheating and flattening, precision coating, and curing and cooling units are sequentially arranged. Plasma activation and dust and static electricity removal improve substrate performance, while preheating and flattening eliminate fabric wrinkles. Slit coating combined with a flexible scraper controls coating thickness, and a synergistic structure of UV curing and air / water cooling enables rapid coating settling. This equipment enables continuous dust-free coating operations with high coating precision and good substrate adhesion, effectively improving problems such as coating peeling and uneven thickness. It is suitable for processing various specifications of lightbox fabric, has a high degree of automation, and significantly improves production efficiency and product quality.

Description

Technical Field

[0001] This invention relates to the field of surface coating processing technology for lightbox fabric, specifically to a precision coating device for processing anti-glare, high-strength lightbox fabric. Background Technology

[0002] With the rapid development of outdoor advertising, supermarket displays, and outdoor signage, the demand for anti-glare, highly stretchable lightbox fabric continues to expand. This type of lightbox fabric needs to possess a soft, anti-glare visual effect, excellent flexibility and stretchability, and long-term stability. The quality of the anti-glare coating directly determines the product's lifespan and performance.

[0003] Currently, traditional lightbox fabric coating equipment has many shortcomings in actual production: conventional conveying mechanisms have poor tension adjustment capabilities, and lightbox fabric is prone to problems such as deviation, wrinkles, and stretching deformation during operation, resulting in insufficient stability in continuous coating operations; the processing area is mostly an open structure, and dust and debris in the production environment can easily adhere to the substrate surface, causing coating spots and defects, which seriously affects the coating yield.

[0004] Meanwhile, lightbox fabric is a flexible substrate, and static electricity and dust easily accumulate on its surface. Conventional processing lacks a systematic pretreatment process, resulting in insufficient bonding strength between the coating and the substrate. This can easily lead to coating peeling and cracking during the later winding and use stages. Before coating, the substrate is prone to warping and wrinkling, and lacks an effective preheating and flattening structure, which can easily cause defects such as uneven coating thickness, missed coating, and localized material accumulation.

[0005] In addition, the traditional coating structure has a single method for adjusting thickness, which is difficult to adapt to the production of lightbox fabrics with different anti-glare levels and different thickness specifications, resulting in a large amount of paint waste. The coating curing mostly adopts natural air drying or a single heating curing mode, which has a slow curing speed and poor shaping effect. High temperature environment can also easily cause deformation of high-ductility lightbox fabrics and stickiness of coatings, resulting in low production efficiency and difficulty in meeting the industry's needs for large-scale, high-quality continuous production. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a precision coating device for processing anti-glare, high-extensibility lightbox fabric. This device solves the problems of unstable conveying, impurities in the processing environment affecting the coating effect, inadequate substrate treatment, insufficient flatness before coating, poor coating accuracy and adaptability, low curing and cooling efficiency, and inconvenient management in traditional lightbox fabric coating equipment.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A precision coating equipment for processing anti-glare, high-stretch lightbox fabric includes an installation platform. A dust-free coating box is fixed in the middle of the upper surface of the installation platform. A fabric conveying unit is provided on the installation platform. The dust-free coating box is equipped with a substrate pretreatment unit, a preheating and flattening unit, a precision coating unit, and a curing and cooling unit.

[0008] As an optimized solution, the precision coating unit includes a feeding box, which is fixed in the middle of the upper surface of the dust-free coating box. A paint delivery pump is fixed on the upper surface of the feeding box, and the paint delivery pump is connected to a delivery pipe. The end of the delivery pipe is fixedly connected to the feeding box.

[0009] As an optimized solution, a paint storage tank connected to the feed box is fixed in the middle of the inner top surface of the dust-free coating box, and a slit extrusion coating head is fixed at the lower end of the paint storage tank. A vertical material thickness limiting plate is fixed inside the slit extrusion coating head.

[0010] As an optimized solution, the precision coating unit also includes a coating roller, which is located above the box fabric, and two flexible scrapers are fixed on the outer peripheral wall of the coating roller and arranged symmetrically at 180° rotation.

[0011] As an optimized solution, the substrate pretreatment unit includes an integrated base, which is fixed to one side of the inner top surface of the dust-free coating box. A plasma treatment machine is integrated at the front end of the integrated base, and the lower end of the plasma treatment machine is set close to the upper surface of the box cloth.

[0012] As an optimized solution, an electrostatic dust removal plate is fixed to the lower rear surface of the integrated base, and the electrostatic dust removal plate is set close to the upper surface of the box cloth.

[0013] As an optimized solution, the substrate pretreatment unit further includes a silicone cleaning roller, which is located behind the electrostatic dust removal plate and rotates close to the upper surface of the box cloth. A stepper motor connected to and driven by the silicone cleaning roller is fixed on the longitudinal outer wall of the dust-free coating box.

[0014] As an optimized solution, the installation platform is a horizontally set, laterally extended square platform, the dust-free coating box is a laterally extended square box, and a central control panel is fixed in the middle of the longitudinal outer wall of the dust-free coating box.

[0015] As an optimized solution, the box fabric conveying unit includes a symmetrically arranged front unwinding assembly and a rear winding assembly. The front unwinding assembly and the rear winding assembly are respectively located on the lateral sides of the dust-free coating box, and the front unwinding assembly and the rear winding assembly have the same structure.

[0016] As an optimized solution, the pre-unwinding assembly includes two longitudinally symmetrical pre-mounting brackets, the lower end of which is fixed to the upper surface of the mounting platform, and the horizontal end of which is fixed to the transverse end face of the dust-free coating box.

[0017] As an optimized solution, each of the front mounting frames has an unwinding clamp seat rotatably mounted on its longitudinal inner wall near the front end. An unwinding drive motor that drives the unwinding clamp seat to rotate around an axis is fixed on the longitudinal outer wall of the front mounting frame. Unwinding cloth rollers are detachably clamped and fixed in the two unwinding clamp seats.

[0018] As an optimized solution, a lifting groove is provided on the outer side wall of the vertical part of each of the front mounting brackets. A horizontal support plate is fixed on the longitudinal outer wall of the front mounting bracket. A lifting telescopic cylinder is fixed on the upper surface of the horizontal support plate. A square lifting seat is fixed on the upper telescopic end of the lifting telescopic cylinder. A connecting longitudinal shaft is rotatably installed on the longitudinal inner wall of the square lifting seat. The end of the connecting longitudinal shaft passes through the lifting groove and extends to the inner side of the front mounting bracket.

[0019] As an optimized solution, a tension adjustment roller is fixed between the two connecting longitudinal shafts.

[0020] As an optimized solution, a correction support roller is rotatably mounted in the middle of the horizontal portion of the two front mounting brackets near the cleanroom coating box. A rotation drive motor is fixed on the longitudinal outer wall of one of the front mounting brackets. The output shaft end of the rotation drive motor passes through the front mounting bracket and is fixed to the center of the side end face of the correction support roller.

[0021] As an optimized solution, two symmetrical correction wheels are slidably sleeved at both ends of the correction support roller, and the correction wheels are telescopically adjustable and mounted on the longitudinal inner wall of the front mounting frame.

[0022] As an optimized solution, two symmetrical guide rollers are rotatably installed between the two front mounting brackets, with the two ends of the guide rollers respectively rotatably installed on the inner sidewalls of the two front mounting brackets near the horizontal ends.

[0023] As an optimized solution, the rear winding assembly includes two longitudinally symmetrical rear mounting brackets, the lower ends of which are also fixed to the upper surface of the mounting platform, and the horizontal ends of which are fixed to the other side transverse end face of the cleanroom coating box.

[0024] As an optimized solution, each of the rear mounting frames has a take-up clamp seat rotatably mounted on its longitudinal inner wall near the rear end. A take-up drive motor that drives the take-up clamp seat to rotate around an axis is fixed on the longitudinal outer wall of the rear mounting frame. A take-up cloth roller is detachably clamped and fixed in the two take-up clamp seats.

[0025] As an optimized solution, the upper ends of the vertical sections of the two rear mounting brackets are also equipped with tension adjusting rollers with the same structure as those in the front unwinding assembly.

[0026] As an optimized solution, the horizontal portions of the two rear mounting brackets near the dust-free coating box are also equipped with a correction support roller and correction wheel ring with the same structure as those in the front unwinding assembly.

[0027] As an optimized solution, two guide rollers symmetrically mounted vertically are also rotatably mounted on the inner sidewalls of the two rear mounting brackets near their horizontal ends.

[0028] As an optimized solution, the substrate pretreatment unit is located between the pre-unwinding assembly and the precision coating unit.

[0029] As an optimized solution, the cleanroom coating chamber has two horizontally symmetrical observation ports in the middle, and each observation port has an observation window fixed inside. The observation window is a U-shaped glass window with the opening facing downwards.

[0030] As an optimized solution, a front cover and a rear cover are fixed in the horizontal openings on both sides of the dust-free coating box, respectively. The front cover is located near the front unwinding assembly, and the rear cover is located near the rear winding assembly. The front cover has a fabric inlet, and the rear cover has a fabric outlet.

[0031] As an optimized solution, the preheating and flattening unit is located between the substrate pretreatment unit and the precision coating unit, and is positioned directly opposite one of the observation ports.

[0032] As an optimized solution, the preheating and flattening unit includes a heat-flattening roller, which is a hollow cylindrical roller. The two longitudinal ends of the heat-flattening roller are respectively rotatably supported on the longitudinal inner wall of the dust-free coating box. The heat-flattening roller is set in close contact with the lower surface of the box cloth. By preheating the substrate box cloth, the coating adhesion is improved.

[0033] As an optimized solution, a flattening drive motor connected to and driven by the heat flattening roller is fixed on one longitudinal outer wall of the dust-free coating box, and a power supply box is fixed on the other longitudinal outer wall of the dust-free coating box. A longitudinally extending and horizontally arranged electric heating rod is fixed on the power supply box. The electric heating rod passes through the side end face of the heat flattening roller and extends into its internal cavity.

[0034] As an optimized solution, the preheating and flattening unit also includes two symmetrical steering mounting seats, which are inverted L-shaped seats. The two steering mounting seats are respectively located on both sides of the longitudinal direction of the coating cloth and fixed on the longitudinal inner wall of the cleanroom coating box.

[0035] As an optimized solution, a micro steering motor is fixed to the upper surface of each steering mounting seat. The output shaft end of the micro steering motor passes downward through the steering mounting seat and is fixed with a flattening plate. The flattening plate can flatten the box fabric after it has been heated in the back by the hot flattening roller, eliminate wrinkles, and ensure the flatness of the substrate before coating.

[0036] As an optimized solution, two support side plates are provided on each of the longitudinal sides of the coating roller. The support side plates are fixed on the longitudinal inner wall of the dust-free coating box, and the two ends of the coating roller are rotatably mounted on the two support side plates respectively.

[0037] As an optimized solution, a coating drive motor is fixed on the longitudinal outer wall of one of the supporting side plates, and the output shaft end of the coating drive motor passes through the supporting side plate and is fixed to the side end face of the coating roller.

[0038] As an optimized solution, a discharge port is provided on the longitudinal inner wall of the dust-free coating box, and an excess material collection box is slidably installed in the discharge port. The upper end of the excess material collection box is open, and the excess material collection box is located directly below the coating roller and the two flexible scrapers.

[0039] As an optimized solution, the curing and cooling unit is located between the post-winding assembly and the precision coating unit.

[0040] As an optimized solution, the curing and cooling unit includes a power supply top mount, which is fixed to the inner top surface of the dust-free coating box, and a plurality of UV curing lamps are fixed longitudinally on the lower surface of the power supply top mount.

[0041] As an optimized solution, the curing and cooling unit also includes an air inlet box, which is fixed to one side of the upper surface of the dust-free coating box and is positioned directly opposite the power supply top mount.

[0042] As an optimized solution, a compressor fan is fixed at the center of the upper surface of the air inlet box, the compressor fan is connected to the air inlet box, and a filter screen is fixed on the inner top surface of the air inlet box.

[0043] As an optimized solution, two diversion air inlet pipes are respectively provided on both longitudinal sides of the air inlet box. The diversion air inlet pipes are fixed on the outer wall of the dust-free coating box, and the two diversion air inlet pipes are respectively connected to the air inlet box.

[0044] As an optimized solution, each of the aforementioned branch air inlet pipes is fixed with a vertically extending water-cooled bend.

[0045] As an optimized solution, three vertically arranged cooling air vents are provided on each longitudinal side wall of the dust-free coating box, and the cooling air vents are inclined downward at 45° toward the surface of the box cloth.

[0046] As an optimized solution, the end of the cooling air vent is connected to the split air inlet pipe, and the six cooling air vents are respectively located on both sides of the power supply top base.

[0047] Compared with the prior art, the beneficial effects of the present invention are: 1. Stable delivery throughout the entire process, with strong adaptability. This equipment features symmetrical unwinding and rewinding components on both the front and rear sides, coupled with height-adjustable tension rollers. These rollers allow for real-time adjustment of the conveyor tension based on the lightbox fabric material and operating speed, preventing fabric from becoming loose, wrinkled, or excessively stretched and deformed. The combination of a correction support roller and an adaptive correction wheel further corrects fabric conveying deviations in real time, ensuring a regular substrate path and eliminating misalignment or deviation issues. This provides a stable conveying foundation for continuous coating processes. Simultaneously, the symmetrical layout of the upper and lower guide rollers further optimizes the fabric's trajectory, improving conveying smoothness.

[0048] 2. Closed-loop, dust-free processing eliminates interference from impurities. The dust-free coating chamber in this equipment adopts a closed structure, with front and rear end covers and a dedicated inlet and outlet sealing design, which effectively isolates external dust and debris from entering the processing area, prevents impurities from adhering to the surface of the lightbox cloth and causing coating defects, ensures a clean environment for coating operations, improves the forming quality of anti-glare coating from the source, and reduces the output of defective products.

[0049] 3. Improved substrate pretreatment enhances coating adhesion. The substrate pretreatment unit in this equipment integrates multiple functions, including plasma activation, electrostatic dust removal, and physical cleaning with silicone rollers. Low-temperature, ambient-pressure plasma treatment can form micro-nano rough anchor points on the surface of the lightbox fabric, significantly enhancing the adhesion between the anti-glare coating and the flexible fabric, effectively preventing coating cracking and peeling during later winding and use. The electrostatic dust removal plate and silicone cleaning roller work together to thoroughly remove surface dust and eliminate static electricity, avoiding problems such as electrostatic adsorption of impurities and uneven coating adhesion, thus laying a solid foundation for subsequent coating.

[0050] 4. Integrated preheating and leveling ensures a smooth coating surface. The preheating and flattening unit in this equipment uses a hollow heat-flattening roller with a built-in heating rod, which can uniformly preheat the lightbox fabric, improve the surface properties of the substrate, and further enhance the coating adhesion. The preheating and flattening unit is also equipped with an adjustable flattening pressure plate, which can specifically press and eliminate defects such as fabric wrinkles and edge warping, ensuring that the substrate surface at the coating station is flat and smooth, avoiding defects such as uneven coating thickness, missed coating, and material accumulation caused by uneven substrate surface, and improving coating uniformity.

[0051] 5. Controllable coating precision and wide range of production adaptability. The precision coating unit in this equipment achieves quantitative coating dispensing through a slit extrusion coating head, and, together with an internal thickness limiting plate, controls the basic coating thickness. The rotatable coating roller is equipped with two sets of flexible scrapers, which can flexibly adjust the scraping angle for precise fine-tuning of the coating thickness, and can also quickly switch between different scraper specifications to adapt to the coating needs of lightbox fabrics with different thicknesses and anti-glare levels. Excess coating can be collected and recycled in a waste collection box, reducing coating waste and saving production costs.

[0052] 6. Synergistic curing and cooling accelerates finished product shaping. The curing and cooling unit in this equipment uses UV curing lamps, which can quickly cure the anti-glare coating with ultraviolet light, locking the molecular structure of the coating in a short time, ensuring the coating's density and molding stability, and meeting the flexible application requirements of high-extensibility lightbox fabric. The filtered clean airflow is cooled by water and then evenly blown onto the fabric through inclined cooling vents, achieving rapid cooling after curing, accelerating the overall shaping speed, shortening the processing cycle, and avoiding high-temperature residue that could cause fabric deformation and coating stickiness.

[0053] 7. Convenient operation and control, high production stability Transparent observation windows are installed on both sides of the enclosure, allowing for direct monitoring of the core processes such as coating and curing. A central control panel facilitates real-time adjustments to equipment operating parameters. The overall structure is compact and rationally designed, with seamless integration of unwinding, coating, curing, and rewinding processes. This enables continuous automated processing of lightbox fabric, effectively improving overall production efficiency and reducing manual intervention costs. Attached Figure Description

[0054] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0055] Figure 1 This is a schematic diagram of the overall external structure of the present invention in the main viewing direction; Figure 2This is a schematic diagram of the overall external structure of the present invention from a top-down perspective; Figure 3 This is a schematic diagram of the overall external structure of the present invention from the left-side view direction; Figure 4 This is an isometric schematic diagram of the three-dimensional structure of the present invention; Figure 5 For the present invention along Figure 2 A schematic diagram of the internal structure cut along line AA. Figure 6 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the middle BB line; Figure 7 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the CC line; Figure 8 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the DD line in the middle; Figure 9 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the EE line; Figure 10 For the present invention along Figure 3 A three-dimensional half-section diagram cut along the FF line.

[0056] In the diagram: 1-Mounting platform, 2-Dust-free coating box, 3-Front mounting frame, 4-Unwinding clamp, 5-Unwinding drive motor, 6-Unwinding fabric roller, 7-Lifting chute, 8-Horizontal support plate, 9-Lifting telescopic cylinder, 10-Square lifting seat, 11-Connecting longitudinal shaft, 12-Tension adjusting roller, 13-Correction support roller, 14-Rotation drive motor, 15-Correction wheel, 16-Guide roller, 17-Rear mounting frame, 18-Rewinding clamp, 19-Rewinding drive motor, 20-Rewinding fabric roller, 21-Observation port, 22-Observation window, 23-Front end cover, 24-Rear end cover, 25-Fabric inlet, 26-Fabric outlet, 27-Feeding box, 28-Paint delivery pump, 29-Conveying pipe, 30-Paint storage tank, 31 - Slit extrusion coating head, 32- Material thickness limiting plate, 33- Integrated base, 34- Plasma treatment machine, 35- Electrostatic dust removal plate, 36- Silicone cleaning roller, 37- Stepper motor, 38- Heat flattening roller, 39- Flattening drive motor, 40- Power supply box, 41- Heating rod, 42- Steering mounting base, 43- Micro steering motor, 44- Flattening pressure plate, 45- Coating roller, 46- Flexible scraper, 47- Support side plate, 48- Coating drive motor, 49- Discharge connection port, 50- Excess material collection box, 51- Power supply top base, 52- UV curing lamp, 53- Air inlet box, 54- Compressor fan, 55- Filter screen cylinder, 56- Diverter air inlet pipe, 57- Water-cooled bend pipe, 58- Cooling air outlet, 59- Central control panel. Detailed Implementation

[0057] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0058] like Figures 1 to 10 As shown, a precision coating equipment for processing anti-glare high-extensibility lightbox fabric includes a mounting platform 1, which is a horizontally set and laterally extended square platform. A dust-free coating box 2 is fixed in the middle of the upper surface of the mounting platform 1. The dust-free coating box 2 is a laterally extended square box. A box fabric conveying unit is provided on the mounting platform 1. The dust-free coating box 2 is respectively provided with a substrate pretreatment unit, a preheating and flattening unit, a precision coating unit, and a curing and cooling unit.

[0059] The fabric conveying unit includes a symmetrically arranged front unwinding assembly and a rear winding assembly. The front unwinding assembly and the rear winding assembly are located on the horizontal sides of the cleanroom coating box 2, and the structures of the front unwinding assembly and the rear winding assembly are exactly the same.

[0060] The pre-unwinding assembly includes two longitudinally symmetrical pre-mounting brackets 3. The lower end of the pre-mounting bracket 3 is fixed to the upper surface of the mounting platform 1, and the horizontal end of the pre-mounting bracket 3 is fixed to the transverse end face of the dust-free coating box 2.

[0061] Each front mounting bracket 3 has an unwinding clamp 4 rotatably mounted on its longitudinal inner wall near the front end. An unwinding drive motor 5 that drives the unwinding clamp 4 to rotate around an axis is fixed on the longitudinal outer wall of the front mounting bracket 3. Unwinding cloth rollers 6 are detachably clamped and fixed inside the two unwinding clamp 4.

[0062] Each front mounting bracket 3 has a lifting groove 7 on its outer side wall of the vertical section. A horizontal support plate 8 is fixed on the longitudinal outer wall of the front mounting bracket 3. A lifting telescopic cylinder 9 is fixed on the upper surface of the horizontal support plate 8. A square lifting seat 10 is fixed on the upper telescopic end of the lifting telescopic cylinder 9. A connecting longitudinal shaft 11 is rotatably installed on the longitudinal inner wall of the square lifting seat 10. The end of the connecting longitudinal shaft 11 passes through the lifting groove 7 and extends to the inner side of the front mounting bracket 3.

[0063] A tension adjusting roller 12 is fixed between the two connecting longitudinal shafts 11.

[0064] Two front mounting brackets 3 are rotatably mounted on the horizontal portion of the side of the dust-free coating box 2. A rotation drive motor 14 is fixed on the longitudinal outer wall of one of the front mounting brackets 3. The end of the output shaft of the rotation drive motor 14 passes through the front mounting bracket 3 and is fixed to the center of the side end face of the rotation drive motor 14.

[0065] Two symmetrical correction wheels 15 are slidably sleeved at both ends of the correction support roller 13. The correction wheels 15 are telescopically adjustable and mounted on the longitudinal inner wall of the front mounting frame 3.

[0066] Two symmetrical guide rollers 16 are also rotatably installed between the two front mounting brackets 3. The two ends of the guide rollers 16 are respectively rotatably installed on the inner sidewalls of the two front mounting brackets 3 near the horizontal end.

[0067] The rear winding assembly includes two longitudinally symmetrical rear mounting brackets 17. The lower end of the rear mounting bracket 17 is also fixed to the upper surface of the mounting platform 1, and the horizontal end of the rear mounting bracket 17 is fixed to the other side of the transverse end face of the dust-free coating box 2.

[0068] Each rear mounting bracket 17 has a take-up clamping seat 18 rotatably mounted on its longitudinal inner wall near the rear end. A take-up drive motor 19 for driving the take-up clamping seat 18 to rotate around an axis is fixed on the longitudinal outer wall of the rear mounting bracket 17. A take-up cloth roller 20 is detachably clamped and fixed inside the two take-up clamping seats 18.

[0069] The upper part of the vertical section of the two rear mounting brackets 17 is also equipped with tension adjusting rollers 12, which have the same structure as those in the front unwinding assembly.

[0070] The horizontal portion of the two rear mounting brackets 17 near the dust-free coating box 2 is also equipped with a correction support roller 13 and a correction wheel 15 with the same structure as those in the front unwinding assembly.

[0071] Two guide rollers 16, symmetrically mounted vertically, are also rotatably mounted on the inner sidewalls of the two rear mounting brackets 17 near their horizontal ends.

[0072] Two horizontally symmetrical observation ports 21 are opened in the middle of the dust-free coating box 2. Each observation port 21 is fixed with an observation window 22, which is a U-shaped glass window with the opening facing downward.

[0073] The front cover 23 and the rear cover 24 are fixed in the horizontal openings on both sides of the dust-free coating box 2. The front cover 23 is located near the front unwinding component, and the rear cover 24 is located near the rear winding component. The front cover 23 has a fabric inlet 25, and the rear cover 24 has a fabric outlet 26.

[0074] The box fabric is unwound by the unwinding roller 6, passes in sequence over the tension adjusting roller 12, the correction support roller 13 and two guide rollers 16, and enters the dust-free coating box 2 through the inlet 25. After a series of coating processes, it is discharged through the outlet 26, passes in sequence over the two guide rollers 16, the correction support roller 13 and the tension adjusting roller 12, and finally winds onto the take-up roller 20 to complete the finished product winding.

[0075] The precision coating unit includes a feed box 27, which is fixed in the middle of the upper surface of the dust-free coating box 2. A paint delivery pump 28 is fixed on the upper surface of the feed box 27. The paint delivery pump 28 is connected to a delivery pipe 29, and the end of the delivery pipe 29 is fixedly connected to the feed box 27.

[0076] A paint storage tank 30, which is connected to the feed box 27, is fixed in the middle of the inner top surface of the dust-free coating box 2. A slit extrusion coating head 31 is fixed at the lower end of the paint storage tank 30. A vertical material thickness limiting plate 32 is fixed inside the slit extrusion coating head 31.

[0077] The substrate pretreatment unit is located between the front unwinding assembly and the precision coating unit.

[0078] The substrate pretreatment unit includes an integrated base 33, which is fixed to the inner top surface of the dust-free coating box 2 on one side. The front end of the integrated base 33 is integrated with a plasma treatment machine 34. The lower end of the plasma treatment machine 34 is set close to the upper surface of the box cloth. The plasma treatment machine 34 can perform atmospheric pressure low temperature plasma treatment to form micro-nano-level rough anchor points on its surface, which improves the bonding force between the anti-glare coating and the flexible substrate and prevents the coating from falling off during the winding process.

[0079] An electrostatic dust removal plate 35 is fixed to the lower rear surface of the integrated base 33, and the electrostatic dust removal plate 35 is set close to the upper surface of the box cloth.

[0080] The substrate pretreatment unit also includes a silicone cleaning roller 36, which is located behind the electrostatic dust removal plate 35 and rotates close to the upper surface of the box cloth. A stepper motor 37 connected to and driven by the silicone cleaning roller 36 is fixed on the longitudinal outer wall of the dust-free coating box 2.

[0081] The electrostatic dust removal plate 35 and the silicone cleaning roller 36 can remove floating dust from the surface of the box cloth, eliminate static electricity, and avoid affecting the subsequent coating bonding.

[0082] The preheating and flattening unit is located between the substrate pretreatment unit and the precision coating unit, and is positioned directly opposite one of the observation ports 21.

[0083] The preheating and flattening unit includes a heat flattening roller 38, which is a hollow cylindrical roller. The two longitudinal ends of the heat flattening roller 38 are respectively rotatably supported on the longitudinal inner wall of the dust-free coating box 2. The heat flattening roller 38 is set close to the lower surface of the box cloth. By preheating the substrate box cloth, the coating adhesion is improved.

[0084] A flattening drive motor 39 connected to and driven by a heat flattening roller 38 is fixed on one longitudinal outer wall of the dust-free coating box 2. A power supply box 40 is fixed on the other longitudinal outer wall of the dust-free coating box 2. A longitudinally extending and horizontally arranged electric heating rod 41 is fixed on the power supply box 40. The electric heating rod 41 passes through the side end face of the heat flattening roller 38 and extends into its internal cavity.

[0085] The preheating and flattening unit also includes two symmetrical steering mounts 42, which are inverted L-shaped seats. The two steering mounts 42 are located on the longitudinal sides of the box cloth and fixed to the longitudinal inner wall of the dust-free coating box 2.

[0086] Each steering mount 42 has a micro steering motor 43 fixed on its upper surface. The output shaft of the micro steering motor 43 passes downward through the steering mount 42 and is fixed with a flattening plate 44. The flattening plate 44 can flatten the box cloth after it has been heated by the hot flattening roller 38, eliminate wrinkles, and ensure the flatness of the substrate before coating.

[0087] The precision coating unit also includes a coating roller 45, which faces another observation port 21 and is located above the box cloth. Two flexible scrapers 46 are fixed on the outer peripheral wall of the coating roller 45 and are arranged symmetrically at 180° rotation. The two flexible scrapers 46 are of different models. By controlling the rotation of the coating roller 45, the scraping angle of the flexible scrapers 46 can be adjusted to adjust the coating thickness, and different models of flexible scrapers 46 can be continuously switched to increase the coating adaptability.

[0088] Two support side plates 47 are provided on both sides of the coating roller 45 in the longitudinal direction. The support side plates 47 are fixed on the longitudinal inner wall of the dust-free coating box 2. The two ends of the coating roller 45 are respectively rotatably installed on the two support side plates 47.

[0089] A coating drive motor 48 is fixed on the longitudinal outer wall of one of the support side plates 47. The output shaft end of the coating drive motor 48 passes through the support side plate 47 and is fixed to the side end face of the coating roller 45.

[0090] The dust-free coating box 2 has a discharge port 49 on its longitudinal inner wall. A waste material collection box 50 is slidably installed in the discharge port 49. The waste material collection box 50 has an opening at its upper end and is located directly below the coating roller 45 and the two flexible scrapers 46.

[0091] The curing and cooling unit is located between the post-winding assembly and the precision coating unit.

[0092] The curing and cooling unit includes a power supply top mount 51, which is fixed on the inner top surface of the dust-free coating box 2. Several UV curing lamps 52 are fixed longitudinally on the lower surface of the power supply top mount 51.

[0093] The curing and cooling unit also includes an air inlet box 53, which is fixed to the horizontal side of the upper surface of the dust-free coating box 2 and is positioned directly opposite the power supply top mount 51.

[0094] A compressor 54 is fixed at the center of the upper surface of the air inlet box 53. The compressor 54 is connected to the air inlet box 53. A filter screen 55 is fixed on the inner top surface of the air inlet box 53.

[0095] Two branch air inlet pipes 56 are provided on both sides of the longitudinal direction of the air inlet box 53. The branch air inlet pipes 56 are fixed on the outer wall of the dust-free coating box 2, and the two branch air inlet pipes 56 are respectively connected to the air inlet box 53.

[0096] Each branch air inlet duct 56 is fixed with a vertically extending water-cooled bend 57.

[0097] Three vertically arranged cooling air vents 58 are provided on each longitudinal side wall of the dust-free coating box 2. The cooling air vents 58 are inclined downward at 45° toward the surface of the box cloth.

[0098] The end of the cooling air vent 58 is connected to the split air inlet pipe 56, and the six cooling air vents 58 are respectively located on both sides of the power supply top base 51.

[0099] A central control panel 59 is fixed in the middle of the longitudinal outer wall of the dust-free coating box 2.

[0100] When using this invention: First, the unwinding drive motor 5 drives the unwinding cloth roller 6 to rotate at a constant speed, so that the whole roll of light box cloth is smoothly unwound and unloaded. During the conveying process, the lifting telescopic cylinder 9 drives the square lifting seat 10 to move vertically along the lifting slide 7, thereby adjusting the height of the tension adjusting roller 12 to adapt to different conveying conditions and adjust the tension of the light box cloth in real time to avoid the cloth from loosening, stretching and deforming. After unfolding, the box fabric passes around the guide roller 16 and the correction support roller 13 in sequence. The drive motor 14 drives the correction support roller 13 to rotate. With the correction wheel 15 that can be adjusted at both ends, the longitudinal deviation of the box fabric is corrected in real time, ensuring that the base material is transported in a regular way. Then the box fabric is smoothly fed into the dust-free coating box 2 through the inlet 25 of the front cover 23. Relying on the sealed structure of the box, the interference of external dust and impurities is reduced, and the cleanliness of the internal processing environment is maintained. After the lightbox fabric enters the box, it first undergoes substrate pretreatment: Under low temperature and normal pressure, the surface of the fabric is first activated by a plasma treatment machine 34, which constructs a micro-nano-level rough structure on the substrate surface, effectively enhancing the bonding strength between the subsequent anti-glare coating and the lightbox fabric substrate, and preventing the coating from peeling off during later winding; then the electrostatic dust removal plate 35 operates to completely remove floating dust from the surface of the lightbox fabric and eliminate surface static electricity; finally, the stepper motor 37 is started to drive the silicone cleaning roller 36 to rotate against the fabric surface to further adhere impurities; The pre-treated box fabric continues to be conveyed forward and enters the preheating and flattening stage: the power supply box 40 supplies power to the heating rod 41, which extends into the hollow heat flattening roller 38 to achieve uniform heat dissipation. The flattening drive motor 39 drives the heat flattening roller 38 to move in contact with the lower surface of the box fabric, preheating the substrate as a whole and improving the basic conditions for coating adhesion. At the same time, the micro steering motors 43 on both sides drive the flattening pressure plate 44 to rotate slightly to adjust and compact the heated box fabric, completely eliminating fabric wrinkles and warping problems, and ensuring that the substrate surface is flat and uniform during the coating operation. The leveled substrate is conveyed to the precision coating station: the paint delivery pump 28 continuously delivers the anti-glare paint to the supply box 27, and then from the supply box 27 to the paint storage tank 30. The paint is quantitatively discharged downward through the slit extrusion coating head 31, and the thickness limit plate 32 initially controls the basic coating thickness. At the same time, the coating drive motor 48 drives the coating roller 45 to rotate at low speed. According to production needs, different specifications of flexible scrapers 46 are switched to adjust the contact angle between the scraper and the fabric surface, and the coating thickness and coating uniformity are precisely adjusted to adapt to the coating requirements of different processes. The excess paint generated by the scraping operation falls from both sides into the waste collection box 50 below for centralized collection, which is convenient for recycling and reuse, and reduces raw material waste. The coated lightbox fabric is then placed under the curing and cooling unit for curing and cooling: the power supply top bracket 51 supplies power to the UV curing lamp 52, which continuously releases ultraviolet light to quickly promote the curing and formation of the anti-glare coating, lock the coating structure, and ensure the stability of the coating formation; the compressor fan 54 draws in outside air, filters and purifies it through the filter screen 55, and then sends it into the air inlet box 53. The airflow is distributed and transported through the split air inlet pipe 56, and the water-cooled bend pipe 57 cools the airflow. Finally, the low-temperature clean airflow is evenly blown onto the surface of the cured lightbox fabric through multiple sets of inclined cooling air vents 58 to achieve rapid cooling and accelerate the overall shaping of the fabric. After completing the coating, curing, and cooling processes, the finished lightbox fabric is discharged from the fabric outlet 26 of the rear cover 24 into the dust-free coating box 2. Then, through the coordinated control of the rear side guide roller 16, the correction support roller 13, and the tension adjustment roller 12, it maintains a stable conveying state. Finally, the winding drive motor 19 of the rear winding assembly drives the winding fabric roller 20 to rotate, neatly winding and storing the finished lightbox fabric, continuously completing the continuous processing operation.

[0101] During equipment operation, operators can view the operating status of core processes such as coating and curing inside the chamber in real time through the observation windows 22 on both sides of the dust-free coating chamber 2. This allows for timely adjustment of equipment parameters via the central control panel 59, ensuring stable overall processing quality.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A precision coating equipment for processing anti-glare, high-stretch lightbox fabric, characterized in that: The system includes an installation platform, on the upper surface of which a dust-free coating box is fixed in the middle. The installation platform is equipped with a box cloth conveying unit, and the dust-free coating box is equipped with a substrate pretreatment unit, a preheating and flattening unit, a precision coating unit, and a curing and cooling unit. The precision coating unit includes a feeding box, which is fixed in the middle of the upper surface of the dust-free coating box. A paint delivery pump is fixed on the upper surface of the feeding box, and the paint delivery pump is connected to a delivery pipe. The end of the delivery pipe is fixedly connected to the feeding box. The inner top surface of the dust-free coating box is fixed with a paint storage tank that communicates with the feeding box. The lower end of the paint storage tank is fixed with a slit extrusion coating head. A vertical material thickness limiting plate is fixed inside the slit extrusion coating head. The precision coating unit also includes a coating roller, which is located above the box cloth. Two flexible scrapers are fixed on the outer peripheral wall of the coating roller and are arranged symmetrically at 180° rotation. The substrate pretreatment unit includes an integrated base, which is fixed to one side of the inner top surface of the dust-free coating box. A plasma treatment machine is integrated at the front end of the integrated base, and the lower end of the plasma treatment machine is set close to the upper surface of the box cloth. An electrostatic dust removal plate is fixed to the lower rear surface of the integrated base, and the electrostatic dust removal plate is set in close contact with the upper surface of the box cloth. The substrate pretreatment unit also includes a silicone cleaning roller, which is located behind the electrostatic dust removal plate and rotates close to the upper surface of the box cloth. A stepper motor connected to and driven by the silicone cleaning roller is fixed on the longitudinal outer wall of the dust-free coating box.

2. The precision coating equipment for processing anti-glare high-stretch lightbox fabric according to claim 1, characterized in that: The installation platform is a horizontally set, laterally extended square platform, and the dust-free coating box is a laterally extended square box. A central control panel is fixed in the middle of the longitudinal outer wall of the dust-free coating box. The fabric conveying unit includes a symmetrically arranged front unwinding assembly and a rear winding assembly. The front unwinding assembly and the rear winding assembly are located on the horizontal sides of the dust-free coating box, and the structures of the front unwinding assembly and the rear winding assembly are exactly the same.

3. The precision coating equipment for processing anti-glare high-stretch lightbox fabric according to claim 2, characterized in that: The front unwinding assembly includes two longitudinally symmetrical front mounting brackets. The lower end of the front mounting bracket is fixed to the upper surface of the mounting platform, and the horizontal end of the front mounting bracket is fixed to the transverse end face of the dust-free coating box. Each of the front mounting frames has an unwinding clamp seat rotatably mounted on its longitudinal inner wall near the front end. An unwinding drive motor that drives the unwinding clamp seat to rotate around an axis is fixed on the longitudinal outer wall of the front mounting frame. Unwinding cloth rollers are detachably clamped and fixed in the two unwinding clamp seats. Each of the front mounting brackets has a lifting groove on its outer side wall of the vertical section. A horizontal support plate is fixed on the longitudinal outer wall of the front mounting bracket. A lifting telescopic cylinder is fixed on the upper surface of the horizontal support plate. A square lifting seat is fixed on the upper telescopic end of the lifting telescopic cylinder. A connecting longitudinal shaft is rotatably mounted on the longitudinal inner wall of the square lifting seat. The end of the connecting longitudinal shaft passes through the lifting groove and extends to the inner side of the front mounting bracket. A tension adjusting roller is fixed between the two connecting longitudinal shafts; A correction support roller is rotatably mounted in the middle of the horizontal portion of the two front mounting brackets near the dust-free coating box. A rotation drive motor is fixed on the longitudinal outer wall of one of the front mounting brackets. The end of the output shaft of the rotation drive motor passes through the front mounting bracket and is fixed to the center of the side end face of the correction support roller. Two symmetrical correction wheel rings are slidably sleeved at both ends of the correction support roller, and the correction wheel rings are telescopically adjustable and mounted on the longitudinal inner wall of the front mounting frame. Two symmetrical guide rollers are rotatably mounted between the two front mounting brackets, with the two ends of the guide rollers respectively rotatably mounted on the inner sidewalls of the two front mounting brackets near the horizontal ends.

4. The precision coating equipment for processing anti-glare high-stretch lightbox fabric according to claim 3, characterized in that: The rear winding assembly includes two longitudinally symmetrical rear mounting brackets. The lower end of the rear mounting bracket is also fixed to the upper surface of the mounting platform, and the horizontal end of the rear mounting bracket is fixed to the other side transverse end face of the dust-free coating box. Each of the rear mounting frames has a take-up clamp seat rotatably mounted on its longitudinal inner wall near the rear end. A take-up drive motor that drives the take-up clamp seat to rotate around an axis is fixed on the longitudinal outer wall of the rear mounting frame. A take-up cloth roller is detachably clamped and fixed in the two take-up clamp seats. The upper ends of the vertical sections of the two rear mounting frames are also equipped with tension adjusting rollers with the same structure as those in the front unwinding assembly; The horizontal portions of the two rear mounting brackets near the dust-free coating box are also equipped with the same correction support rollers and correction wheel rings as those in the front unwinding assembly. Two guide rollers, symmetrically positioned vertically, are also rotatably mounted on the inner sidewalls of the two rear mounting brackets near their horizontal ends. The substrate pretreatment unit is located between the pre-unwinding assembly and the precision coating unit.

5. The precision coating equipment for processing anti-glare high-stretch lightbox fabric according to claim 4, characterized in that: The cleanroom coating chamber has two horizontally symmetrical observation ports in the middle, and each observation port has an observation window fixed inside. The observation window is a U-shaped glass window with the opening facing downwards. A front cover and a rear cover are fixed in the horizontal openings on both sides of the dust-free coating box. The front cover is located near the front unwinding assembly, and the rear cover is located near the rear winding assembly. The front cover has a fabric inlet, and the rear cover has a fabric outlet.

6. The precision coating equipment for processing anti-glare high-stretch lightbox fabric according to claim 5, characterized in that: The preheating and flattening unit is located between the substrate pretreatment unit and the precision coating unit, and is positioned directly opposite one of the observation ports; The preheating and flattening unit includes a heat flattening roller, which is a hollow cylindrical roller. The two longitudinal ends of the heat flattening roller are rotatably supported on the longitudinal inner wall of the dust-free coating box. The heat flattening roller is set close to the lower surface of the box cloth. By preheating the substrate box cloth, the coating adhesion is improved. A flattening drive motor connected to and driven by the heat flattening roller is fixed on one longitudinal outer wall of the dust-free coating box. A power supply box is fixed on the other longitudinal outer wall of the dust-free coating box. A longitudinally extending and horizontally arranged electric heating rod is fixed on the power supply box. The electric heating rod passes through the side end face of the heat flattening roller and extends into its internal cavity.

7. The precision coating equipment for processing anti-glare high-stretch lightbox fabric according to claim 6, characterized in that: The preheating and flattening unit also includes two symmetrical turning mounting seats, which are inverted L-shaped seats. The two turning mounting seats are respectively located on the longitudinal sides of the box cloth and fixed on the longitudinal inner wall of the dust-free coating box. Each of the steering mounting seats has a micro steering motor fixed on its upper surface. The output shaft of the micro steering motor passes downward through the steering mounting seat and is fixed with a flattening plate. The flattening plate can flatten the box cloth after it has been heated by the hot flattening roller, eliminate wrinkles, and ensure the flatness of the substrate before coating.

8. The precision coating equipment for processing anti-glare high-stretch lightbox fabric according to claim 7, characterized in that: The coating roller has two supporting side plates on its longitudinal sides. The supporting side plates are fixed to the longitudinal inner wall of the dust-free coating box. The two ends of the coating roller are rotatably mounted on the two supporting side plates. A coating drive motor is fixed on the longitudinal outer wall of one of the supporting side plates, and the end of the output shaft of the coating drive motor passes through the supporting side plate and is fixed to the side end face of the coating roller. The dust-free coating box has a discharge port on its longitudinal inner wall. A waste material collection box is slidably installed in the discharge port. The waste material collection box has an opening at its upper end and is located directly below the coating roller and the two flexible scrapers.

9. The precision coating equipment for processing anti-glare high-stretch lightbox fabric according to claim 8, characterized in that: The curing and cooling unit is located between the post-winding assembly and the precision coating unit; The curing and cooling unit includes a power supply top mount, which is fixed to the inner top surface of the dust-free coating box. Several UV curing lamps are fixed longitudinally on the lower surface of the power supply top mount.

10. The precision coating equipment for processing anti-glare high-stretch lightbox fabric according to claim 9, characterized in that: The curing and cooling unit also includes an air inlet box, which is fixed to one side of the upper surface of the dust-free coating box and is positioned directly opposite the power supply top bracket. A compressor is fixed at the center of the upper surface of the air inlet box, and the compressor is connected to the air inlet box. A filter screen is fixed on the inner top surface of the air inlet box. Two branch air inlet pipes are provided on each of the longitudinal sides of the air inlet box. The branch air inlet pipes are fixed on the outer wall of the dust-free coating box, and the two branch air inlet pipes are respectively connected to the air inlet box. Each of the aforementioned branch air inlet pipes is fixed with a vertically extending water-cooled bend. Three vertically arranged cooling air vents are provided on each longitudinal side wall of the dust-free coating box, and the cooling air vents are inclined downward at 45° toward the surface of the box cloth. The end of the cooling air vent is connected to the split air inlet pipe, and the six cooling air vents are respectively located on both longitudinal sides of the power supply top base.

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