Visual detection device and detection method for high color fastness of TR fabric padding product

Abstract

The application discloses a kind of visual detection device and detection method of TR fabric high color fastness padding product, it is related to visual detection technical field, including visual detection device, and visual detection device includes unwinding unit, dark box and winding unit, the inside of the dark box is provided with positioning mechanism for the fabric of detection position is positioned, positioning mechanism includes: negative pressure unit, is set to the inside of dark box, by setting positioning mechanism, effectively solve the soft TR fabric in open detection area due to tension fluctuation and residual deformation and lead to the problem of bulging, warping.Negative pressure unit in the suction pump operation, negative pressure is generated in the inside of negative pressure box, and uniform adsorption force is generated to the air-permeable fabric body through the round hole on its top.Meanwhile, negative pressure box is equipped with several partition plates and is divided into multiple independent negative pressure chambers, and the size of negative pressure is adjusted by the electromagnetic valve installed on branch pipe, so that fine control of fabric tension is realized.

Description

Technical Field

[0001] This invention relates to the field of visual inspection technology, specifically to a visual inspection device and method for high color fastness dyed TR fabrics. Background Technology

[0002] TR fabrics combine the high strength and wrinkle resistance of polyester with the moisture absorption and breathability of viscose fibers, making them a commonly used material for high-end clothing fabrics. To meet market demands for vibrant colors and durability, TR fabrics are often dyed using a continuous pad-dyeing process, and then finished with processes such as color fixing and post-treatment to impart high colorfastness properties, such as colorfastness to washing and rubbing reaching level four or higher.

[0003] According to the patent titled "An Integrated Machine for Testing Color Fastness of Textiles" (Patent Publication No.: CN114473473B, Patent Publication Date: 2022-07-01), the invention includes a vertical plate with strip-shaped protrusions and a pressure plate. The strip-shaped protrusions from the vertical plate and has a mating end face. A base is positioned opposite the vertical plate, and a frame plate is fixed on the base. A slide table capable of bidirectional movement based on a plane is mounted on the frame plate. An upright mounting plate is fixed on the slide table, and a rotating straight tube is mounted on the mounting plate. A rotary joint is connected to the rear end of the straight tube, and the rotary joint has at least four input joints for connecting a media source. A blind end is provided at the end of the straight tube adjacent to the vertical plate, and the outer end face of the blind end is a positioning end face. The lateral projection of the positioning end face falls within the range of the mating end face, and a through hole is provided on the positioning end face. The advantages of this invention are: it is flexible, simple, and efficient in operation, reducing interference factors in the evaluation process.

[0004] Based on the aforementioned existing technologies, current visual inspection devices and methods for high color fastness pad-dyed TR fabrics still have the following problems: TR fabrics are relatively soft, and after pad-dyeing and finishing, the internal stress distribution is uneven. When entering the open inspection area, they are easily affected by fluctuations in conveying tension, ambient airflow, and their own residual deformation, resulting in local bulging, warping, or slight vibration, which makes it impossible for the fabric surface to be naturally flat. Therefore, this invention provides a visual inspection device and method for high color fastness pad-dyed TR fabrics. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a visual inspection device and method for high color fastness pad-dyed TR fabrics. This solves the problem that soft TR fabrics with uneven internal stress after pad-dyeing are prone to local bulging, warping, or slight vibrations in the open inspection area due to fluctuations in conveying tension, ambient airflow, and their own residual deformation, making it impossible to naturally flatten.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a visual inspection device and method for high color fastness dyed TR fabrics, comprising a visual inspection device, wherein the visual inspection device includes an unwinding unit, a dark box, and a winding unit, wherein the unwinding unit, dark box, and winding unit are arranged sequentially from right to left, and a fabric body is provided at the output end of the unwinding unit, and the fabric body enters the interior of the winding unit through the interior of the dark box, wherein a positioning mechanism is provided inside the dark box for positioning the fabric at the inspection position, the positioning mechanism comprising: The negative pressure unit is located inside the dark box and includes a card holder, a negative pressure box, round holes, pressure belts, and branch pipes. There are two negative pressure boxes on the top of the card holder, and branch pipes are located below the negative pressure boxes. Several round holes are opened on the top, and pressure belts are installed above through a fixing unit. The suction generated by the two sets of filter components enters the negative pressure box through the branch pipes, causing it to generate suction. The pressure belts adsorb the fabric body onto the round holes and move it. The negative pressure box is equipped with several partitions, which divide it into multiple independent negative pressure chambers. Each chamber corresponds to a branch pipe, and a solenoid valve is installed on the branch pipe to adjust the negative pressure. A separation component is located below the negative pressure box to separate and clean the negative pressure box and clean the inside of the round holes.

[0007] Preferably, the visual inspection device further includes a top cover hinged to the top of the darkroom, a mounting frame fixedly installed inside the darkroom, and a clip inserted into a rectangular hole in the middle of the mounting frame. An upper frame is installed in a linear array at the top of the inner cavity of the top cover, and several upper visual inspection heads are arranged below the upper frame. A lower frame is fixedly installed at the bottom of the inner cavity of the darkroom, and several lower visual inspection heads are installed in a linear array at the top of the lower frame. The fabric body passing through the circular hole is inspected by the upper and lower visual inspection heads.

[0008] Preferably, the filtration assembly includes a connecting pipe, a filter box, a suction pump, and an exhaust pipe. One end of the connecting pipe is fixedly connected to a branch pipe. The filter box is fixedly installed at the bottom of the inner cavity of the dark box. The other end of the connecting pipe is fixedly connected to one side of the filter box. The suction pump is fixedly installed on the side of the filter box away from the connecting pipe. The output end of the suction pump is fixedly connected to the exhaust pipe, and one end of the exhaust pipe extends out of the dark box. The suction pump generates suction, creating negative pressure inside the filter box. The negative pressure box is then simultaneously generated with suction through the connecting pipe and the branch pipe.

[0009] Preferably, a first track frame and a second track frame are fixedly installed inside the filter box. A mesh filter plate is slidably inserted into the first track frame through a sealing gasket, and a sponge filter plate is slidably inserted into the second track frame through a sealing gasket.

[0010] Preferably, a front plate is fixedly installed on the front side of the filter box by a threaded button, which enables quick disassembly and assembly of the front plate for cleaning the inside of the filter box. A rubber gasket is fixedly installed between the front plate and the filter box for sealing the filter box, the first track frame, the second track frame and the front plate.

[0011] Preferably, a fixed box is fixedly installed above the negative pressure box, and two fixed plates are fixedly installed inside the fixed box. A sliding column is fixedly installed on one side of the fixed plate, and a sliding block is slidably installed on the sliding column. A spring is sleeved on the surface of the sliding column and is located between the fixed plate and the sliding block. The pressure band is clamped by two sets of clamping components on the sliding block, and the spring itself pushes the sliding block to move, so that the pressure band is taut.

[0012] Preferably, the clamping assembly includes a screw knob screwed into the sliding block. The bottom end of the screw knob is rotatably connected to a clamping plate. The bottom of the clamping plate and the top of the sliding block base plate are both linearly arrayed with several pressure teeth. By rotating the screw knob, the clamping plate is moved downward, so that the clamping plate and the sliding block base plate clamp the pressure band. A limit groove is opened on one side of the sliding block. A limit block is fixedly installed on one side of the clamping plate, and the limit block slides inside the limit groove to realize the limited movement of the clamping plate.

[0013] Preferably, a protective component is provided between the two circular holes and the two fixing boxes. The protective component includes a slot formed inside the circular holes and the fixing boxes. A pad is fixedly installed inside the slot, and a protective glass is slidably inserted into the pad.

[0014] Preferably, the separation assembly includes a base plate and two T-shaped blocks. The branch pipe is fixedly installed at the bottom of the base plate, and the two T-shaped blocks are fixedly installed on the front and rear sides of the bottom of the negative pressure box. T-shaped grooves are provided on the front and rear sides of the top of the base plate. The T-shaped blocks are slidably inserted into the interior of the T-shaped grooves, so that the negative pressure box is slidably installed on the base plate. A rubber gasket is provided between the base plate and the negative pressure box to ensure a sealed connection between the negative pressure box and the base plate.

[0015] This invention also discloses a visual inspection method for high color fastness pad-dyed TR fabrics, comprising the following steps: S1: Pass the fabric body output from the unwinding unit through the pressure belt and the round hole at the top of the negative pressure box, and connect it to the winding unit; S2: Start the filter assembly. The negative pressure box generates suction through the branch pipe, which adsorbs the fabric body through the round hole. The pressure belt presses the fabric body onto the round hole. S3: Activate the vision inspection device to inspect the fabric body moving on the circular hole.

[0016] This invention provides a visual inspection device and method for high color fastness pad-dyed products of TR fabrics. Compared with the prior art, it has the following advantages: 1. The visual inspection device and method for high colorfastness dyed TR fabrics effectively solves the problems of bulging and warping caused by tension fluctuations and residual deformation in the open inspection area of ​​soft TR fabrics by setting up a positioning mechanism. The operation of the suction pump in the negative pressure unit generates negative pressure inside the negative pressure box, which generates uniform adsorption force on the breathable fabric through the round hole at the top. At the same time, the negative pressure box is equipped with several independent negative pressure chambers divided by several partitions. The negative pressure is adjusted by solenoid valves installed on the branch pipes, realizing precise control of fabric tension. The pressure belt, which is taut under the action of spring force, presses the fabric smoothly onto the surface of the negative pressure box, keeping it absolutely flat during moving inspection. In addition, the separation component set at the bottom of the negative pressure box can easily separate and clean the negative pressure box and thoroughly clean the inside of the round hole, fundamentally eliminating the interference of uneven fabric surface and round hole blockage on the inspection results.

[0017] 2. The visual inspection device and method for high color fastness pad-dyed TR fabrics ensures that the fabric remains flat and stationary as it passes through the circular hole due to the positioning mechanism. The upper and lower visual inspection heads, installed inside the dark chamber, can acquire high-quality images without distortion or shadows. Simultaneously, the dark chamber isolates the fabric from external airflow and stray light interference, and the removable and replaceable protective glass protects the inspection heads from fiber dust contamination, thus achieving accurate and stable inspection of color uniformity and surface defects in high color fastness pad-dyed products. 3. The visual inspection device and method for high colorfastness dyed TR fabrics utilize a filtration assembly and positioning mechanism that work in tandem to ensure both long-term effectiveness of the adsorption force and a clean inspection environment. The air drawn in by the suction pump from the negative pressure chamber carries fabric fibers and dust; direct passage through the pump would degrade its performance. Therefore, the air undergoes two-stage filtration—first through a mesh filter plate and then a sponge filter plate within the filter box—before being discharged through the exhaust pipe. This prevents impurities from clogging the holes in the negative pressure chamber or contaminating the optical components inside the darkroom, ensuring the sustained stability of the adsorption force and the long-term reliable operation of the visual inspection system. Attached Figure Description

[0018] Figure 1 This is a frontal perspective view of the three-dimensional structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a partial three-dimensional structural diagram of the present invention; Figure 4 This is a three-dimensional structural diagram of the positioning mechanism of the present invention; Figure 5This is a three-dimensional structural diagram of the filter component of the present invention. Figure 6 This is a three-dimensional structural diagram of the fixed unit of the present invention; Figure 7 This is a three-dimensional structural diagram of the fixed unit of the present invention. Figure 8 This is a partial cross-sectional perspective view of the clamping assembly of the present invention; Figure 9 This is a partial cross-sectional bottom view of the clamping assembly of the present invention. Figure 10 This is a three-dimensional structural diagram of the protective component of the present invention.

[0019] In the diagram: 1. Vision inspection device; 11. Dark box; 12. Top cover; 13. Unwinding unit; 14. Rewinding unit; 15. Fabric body; 16. Upper frame; 17. Upper vision inspection head; 18. Lower frame; 19. Lower vision inspection head; 110. Mounting frame; 2. Positioning mechanism; 21. Negative pressure unit; 211. Card holder; 212. Negative pressure box; 213. Round hole; 214. Pressure belt; 215. Branch pipe; 216. Partition plate; 217. Solenoid valve; 22. Fixing unit; 221. Fixing box; 222. Fixing plate; 223. Sliding column; 2 24. Spring; 225. Sliding block; 3. Filter assembly; 31. Connecting pipe; 32. Filter box; 33. Suction pump; 34. Exhaust pipe; 35. First track frame; 36. Second track frame; 37. Front plate; 38. Threaded button; 39. Rubber pad; 4. Clamping assembly; 41. Screw knob; 42. Clamping plate; 43. Limiting block; 44. Limiting groove; 45. Pressure tooth; 5. Protective assembly; 51. Slot; 52. Slip pad; 53. Protective glass; 6. Separation assembly; 61. Base plate; 62. T-slot; 63. T-block; 64. Rubber sealing gasket. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-10 The present invention provides a technical solution: A visual inspection device for high color fastness dyed TR fabric products includes a visual inspection device 1, which comprises an unwinding unit 13, a dark box 11, and a winding unit 14, arranged sequentially from right to left. A fabric body 15 is disposed at the output end of the unwinding unit 13, and the fabric body 15 enters the winding unit 14 through the interior of the dark box 11. A positioning mechanism 2 is disposed inside the dark box 11 for positioning the fabric at the inspection position. The positioning mechanism 2 includes: The negative pressure unit 21 is located inside the dark box 11 and includes a card holder 211, a negative pressure box 212, a round hole 213, a pressure belt 214, and a branch pipe 215. The card holder 211 has two negative pressure boxes 212 on its top and a branch pipe 215 below the negative pressure box 212. The top of the negative pressure box 211 has several round holes 213. The pressure belt 214 is installed above the negative pressure box 214 through the fixing unit 22. The suction generated by the two sets of filter components 3 enters the negative pressure box 212 through the branch pipe 215, causing it to generate suction. The pressure belt 214 adsorbs the fabric body 15 onto the round hole 213 and moves it. The negative pressure box 212 is provided with several partitions 216, which divide it into multiple independent negative pressure chambers. Each chamber corresponds to the branch pipe 215. The branch pipe 215 is equipped with a solenoid valve 217 to adjust the negative pressure. The negative pressure box 212 is provided with a separation component 6 below it, which is used to separate and clean the negative pressure box 212 and clean the inside of the round hole 213.

[0022] Specifically, the density of the pressure belt 214 is greater than that of the fabric body 15. By setting up the negative pressure unit 21, the circular holes 213 on the negative pressure box 212 generate uniform suction. Combined with the downward pressure of the pressure belt 214, the soft and easily deformable fabric body 15 can be firmly adsorbed onto the flat detection surface, effectively eliminating bulges and warping caused by residual stress during the conveying process, and providing ideal flat fabric surface conditions for subsequent visual inspection. The drive motors of both the unwinding unit 13 and the winding unit 14 can be preferably servo motors of model MHMF082L1U. With the help of a dedicated tension controller, the fabric body 15 can be conveyed with constant tension and stability during the detection process, avoiding the impact of speed fluctuations on the adsorption and flattening effect.

[0023] The solenoid valve 217 is preferably a direct-acting solenoid valve of model SMC VX21-5GZ1-B. This solenoid valve is suitable for air media and has the characteristics of fast response speed, low leakage and suitability for negative pressure pipelines. It can accurately adjust the adsorption force of each independent negative pressure chamber.

[0024] In this embodiment, the visual inspection device 1 also includes a top cover 12 hinged above the dark box 11. A mounting bracket 110 is fixedly installed inside the dark box 11, and a clip 211 is inserted into the rectangular hole in the middle of the mounting bracket 110. An upper frame 16 is installed in a linear array on the top of the inner cavity of the top cover 12. Several upper visual inspection heads 17 are arranged below the upper frame 16. A lower frame 18 is fixedly installed at the bottom of the inner cavity of the dark box 11. Several lower visual inspection heads 19 are installed in a linear array on the top of the lower frame 18. The fabric body 15 passing through the circular hole 213 is inspected by the upper visual inspection heads 17 and the lower visual inspection heads 19.

[0025] Specifically, by installing multiple upper vision inspection heads 17 and lower vision inspection heads 19 in a linear array on the upper and lower sides inside the dark box 11, it is possible to simultaneously perform all-round, blind-spot-free image acquisition on both sides of the fabric body 15, greatly improving inspection efficiency and defect detection rate, and ensuring that the quality of both sides of the high color fastness product meets the requirements. Both the upper vision inspection head 17 and the lower vision inspection head 19 can preferably be industrial area array cameras of model MV-CE200-10UC. This camera has a high resolution of 20 million pixels, a global shutter, and a high-brightness LED light source, which can clearly capture subtle color differences and surface defects of the fabric body 15 during high-speed movement.

[0026] In this embodiment, the filter assembly 3 includes a connecting pipe 31, a filter box 32, a suction pump 33, and an exhaust pipe 34. One end of the connecting pipe 31 is fixedly connected to a branch pipe 215. The filter box 32 is fixedly installed at the bottom of the inner cavity of the dark box 11. The other end of the connecting pipe 31 is fixedly connected to one side of the filter box 32. The suction pump 33 is fixedly installed on the side of the filter box 32 away from the connecting pipe 31. The output end of the suction pump 33 is fixedly connected to the exhaust pipe 34, and one end of the exhaust pipe 34 extends through the dark box 11. The suction pump 33 generates suction, which creates negative pressure inside the filter box 32. The negative pressure box 212 is synchronously generated with negative pressure suction through the connecting pipe 31 and the branch pipe 215.

[0027] Specifically, by setting a first track frame 35 and a second track frame 36 inside the filter box 32, and inserting and installing a mesh filter plate and a sponge filter plate respectively, the intake dusty air can be filtered in a two-stage gradient, effectively intercepting fiber lint and small particles, preventing the round hole 213 from clogging and protecting the suction pump 33, thus ensuring the long-term stable operation of the negative pressure system. The suction pump 33 can preferably be an oil-free micro vacuum pump of model VAY8820, which has the characteristics of large flow rate, high vacuum degree, small size and no oil pollution, and can provide a continuous and stable negative pressure source for the negative pressure box 212, ensuring effective adsorption of the fabric body 15.

[0028] In this embodiment, a first track frame 35 and a second track frame 36 are fixedly installed inside the filter box 32. A mesh filter plate is slidably inserted into the first track frame 35 through a sealing gasket, and a sponge filter plate is slidably inserted into the second track frame 36 through a sealing gasket. A front plate 37 is fixedly installed on the front side of the filter box 32 through a threaded button 38, which enables quick disassembly and assembly of the front plate 37 for cleaning the inside of the filter box 32. A rubber gasket 39 is fixedly installed between the front plate 37 and the filter box 32 for sealing the filter box 32, the first track frame 35, the second track frame 36 and the front plate 37.

[0029] Specifically, by using the threaded button 38 to detachably install the front plate 37 on the front side of the filter box 32 and sealing it with the rubber gasket 39, the inside of the filter box 32 and the filter plate can be quickly and conveniently cleaned and replaced, which greatly reduces the maintenance difficulty and downtime of the equipment and improves the continuous operation capability of the production line.

[0030] In this embodiment, a fixed box 221 is fixedly installed above the negative pressure box 212. Two fixed plates 222 are fixedly installed inside the fixed box 221, and a sliding column 223 is fixedly installed on one side of the fixed plate 222. A sliding block 225 is slidably installed on the sliding column 223. A spring 224 is sleeved on the surface of the sliding column 223. The spring 224 is located between the fixed plate 222 and the sliding block 225. The pressure band 214 is clamped by two sets of clamping components 4 provided on the sliding block 225, and the sliding block 225 is moved by the elastic force of the spring 224 itself, so that the pressure band 214 is taut.

[0031] Specifically, by setting a fixing unit 22 consisting of a sliding column 223, a spring 224 and a sliding block 225, the spring 224 continuously pushes the sliding block 225 to move outward, which can automatically tension the pressure belt 214 fixed by the clamping assembly 4, so that it always remains straight and taut, and avoid the pressure belt 214 from loosening and affecting the pressing effect on the fabric body 15.

[0032] In this embodiment, the clamping assembly 4 includes a screw knob 41 that is screwed into the sliding block 225. The bottom end of the screw knob 41 is rotatably connected to a clamping plate 42. The bottom of the clamping plate 42 and the top of the bottom plate of the sliding block 225 are both linearly arrayed with several pressure teeth 45. By rotating the screw knob 41, the clamping plate 42 is driven to move downward, so that the clamping plate 42 and the bottom plate of the sliding block 225 clamp the pressure band 214. A limiting groove 44 is opened on one side of the sliding block 225. A limiting block 43 is fixedly installed on one side of the clamping plate 42, and the limiting block 43 slides inside the limiting groove 44 to realize the limiting movement of the clamping plate 42.

[0033] Specifically, by setting pressure teeth 45 in the clamping assembly 4 and using screw knob 41 to drive clamping plate 42 to press down, the contact friction and clamping stability with pressure belt 214 can be greatly increased, preventing pressure belt 214 from slipping under long-term force, and ensuring continuous and reliable constraint of the fabric by positioning mechanism 2.

[0034] In this embodiment, a protective component 5 is provided between the two round holes 213 and the two fixed boxes 221. The protective component 5 includes a slot 51 opened inside the round holes 213 and the fixed box 221. A pad 52 is fixedly installed inside the slot 51, and a protective glass 53 is slidably inserted into the pad 52.

[0035] Specifically, by setting a slidable protective glass 53 between the round hole 213 and the fixing box 221 and installing it in the pad 52, it can effectively prevent pollutants such as flying fluff and dust carried by the fabric body 15 from contacting the visual inspection head below, and can be easily replaced after the glass is scratched or contaminated, thus protecting the core optical components at a very low cost.

[0036] In this embodiment, the separation component 6 includes a base plate 61 and two T-shaped blocks 63. The branch pipe 215 is fixedly installed at the bottom of the base plate 61, and the two T-shaped blocks 63 are fixedly installed on the front and rear sides of the bottom of the negative pressure box 212. T-shaped grooves 62 are provided on the front and rear sides of the top of the base plate 61. The T-shaped blocks 63 are slidably inserted into the interior of the T-shaped grooves 62, so that the negative pressure box 212 is slidably installed on the base plate 61. A rubber gasket 64 is provided between the base plate 61 and the negative pressure box 212 to seal the connection between the negative pressure box 212 and the base plate 61.

[0037] Specifically, by setting up a separation component 6 consisting of a base plate 61, a T-shaped block 63, and a T-shaped groove 62, and using a rubber sealing gasket 64 for sealing, a detachable sliding rail installation between the negative pressure box 212 and the branch pipe 215 is achieved. When maintenance of the negative pressure box 212 is required, the operator can directly slide the negative pressure box 212 out from the base plate 61 along the direction of the T-shaped groove 62, thereby thoroughly cleaning the inner cavity of the negative pressure box 212 and the round hole 213 at the top. The rubber sealing gasket 64 ensures the airtightness between the negative pressure box 212 and the base plate 61 when the negative pressure box 212 is in operation, preventing air leakage that could lead to a decrease in adsorption force. This structure greatly reduces the difficulty of cleaning after the round hole 213 becomes clogged, ensuring the long-term effective operation of the negative pressure adsorption system.

[0038] This invention also discloses a visual inspection method for high color fastness pad-dyed TR fabrics, comprising the following steps: S1: Pass the fabric body 15 output from the unwinding unit 13 through the pressure belt 214 and the round hole 213 at the top of the negative pressure box 212, and connect it to the winding unit 14. S2: Start the filter assembly 3, and generate suction inside the negative pressure box 212 through the branch pipe 215. The fabric body 15 is adsorbed through the round hole 213, and the pressure belt 214 presses the fabric body 15 onto the round hole 213. S3: Start the visual inspection device 1 to inspect the fabric body 15 moving on the circular hole 213.

[0039] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0040] During operation, firstly, insert the two protective glass panes 53 into the two clamping pads 52 respectively, and place both ends of the pressure band 214 under the two clamping plates 42 respectively. Then, clamp and fix the pressure band 214 by rotating the screw knob 41. Secondly, the spring 224 pushes the sliding block 225 to move in the opposite direction through its own elastic force, so that the pressure band 214 is tightened; Next, the top cover 12 is opened, and the fabric body 15 output from the unwinding unit 13 is passed between the pressure belt 214 and the round hole 213 and enters the inside of the winding unit 14. Then, the suction pump 33 operates to generate suction, creating negative pressure inside the filter box 32. The fabric body 15 is adsorbed through the connecting pipe 31, branch pipe 215, negative pressure box 212, and round hole 213. The fabric body 15 is breathable. The adsorption pressure belt 214 presses down on the fabric body 15, pressing it onto the round hole 213. The upper visual inspection head 17 and lower visual inspection head 19 inspect the fabric body 15. The air drawn in by the negative pressure box 212 enters the interior of the filter box 32 and is filtered by the mesh plate and sponge plate inside the first track frame 35 and the second track frame 36. After filtration, it is discharged through the exhaust pipe 34. When cleaning is required, the negative pressure box 212 can be slid out along the T-shaped groove 62 for easy cleaning of the round hole 213 and the inner cavity of the negative pressure box 212. Finally, after inspection, turn the threaded knob 38 to remove the front plate 37, clean the inside of the filter box 32, and replace or clean the mesh plate and sponge plate inside the first track frame 35 and the second track frame 36.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A visual inspection device for high colorfastness dyed TR fabric products, comprising a visual inspection device, wherein the visual inspection device includes an unwinding unit, a dark box, and a winding unit, wherein the unwinding unit, the dark box, and the winding unit are arranged sequentially from right to left, and a fabric body is provided at the output end of the unwinding unit, and the fabric body enters the interior of the winding unit through the interior of the dark box, characterized in that: The dark box is equipped with a positioning mechanism for positioning the fabric at the detection location. The positioning mechanism includes: The negative pressure unit is located inside the dark box and includes a card holder, a negative pressure box, round holes, pressure belts, and branch pipes. There are two negative pressure boxes on the top of the card holder, and branch pipes are located below the negative pressure boxes. Several round holes are opened on the top, and pressure belts are installed above through a fixing unit. The suction generated by the two sets of filter components enters the negative pressure box through the branch pipes, causing it to generate suction. The pressure belts adsorb the fabric body onto the round holes and move it. The negative pressure box is equipped with several partitions, which divide it into multiple independent negative pressure chambers. Each chamber corresponds to a branch pipe, and a solenoid valve is installed on the branch pipe to adjust the negative pressure. A separation component is located below the negative pressure box to separate and clean the negative pressure box and clean the inside of the round holes.

2. The visual inspection device for high color fastness dyed TR fabric products according to claim 1, characterized in that: The visual inspection device also includes a top cover hinged to the top of the darkroom. A mounting frame is fixedly installed inside the darkroom, and a clip is inserted into a rectangular hole in the middle of the mounting frame. An upper frame is installed in a linear array on the top of the inner cavity of the top cover. Several upper visual inspection heads are arranged below the upper frame. A lower frame is fixedly installed at the bottom of the inner cavity of the darkroom. Several lower visual inspection heads are installed in a linear array on the top of the lower frame. The fabric body passing through the circular hole is inspected by the upper and lower visual inspection heads.

3. The visual inspection device for high color fastness pad-dyed TR fabric products according to claim 1, characterized in that: The filtration assembly includes a connecting pipe, a filter box, a suction pump, and an exhaust pipe. One end of the connecting pipe is fixedly connected to a branch pipe. The filter box is fixedly installed at the bottom of the inner cavity of the dark box. The other end of the connecting pipe is fixedly connected to one side of the filter box. The suction pump is fixedly installed on the side of the filter box away from the connecting pipe. The output end of the suction pump is fixedly connected to the exhaust pipe, and one end of the exhaust pipe extends out of the dark box. The suction pump generates suction, creating negative pressure inside the filter box. The negative pressure box is then simultaneously generated with suction through the connecting pipe and the branch pipe.

4. The visual inspection device for high color fastness pad-dyed TR fabric products according to claim 3, characterized in that: The filter box is fixedly installed with a first track frame and a second track frame. A mesh filter plate is slidably inserted into the first track frame through a sealing gasket, and a sponge filter plate is slidably inserted into the second track frame through a sealing gasket.

5. The visual inspection device for high color fastness pad-dyed TR fabric products according to claim 4, characterized in that: A front plate is fixedly installed on the front side of the filter box by a threaded button, which allows for quick disassembly and assembly of the front plate for cleaning the inside of the filter box. A rubber gasket is fixedly installed between the front plate and the filter box for sealing the filter box, the first track frame, the second track frame and the front plate.

6. The visual inspection device for high color fastness pad-dyed TR fabric products according to claim 1, characterized in that: A fixed box is fixedly installed above the negative pressure box. Two fixed plates are fixedly installed inside the fixed box, and a sliding column is fixedly installed on one side of the fixed plate. A sliding block is slidably installed on the sliding column. A spring is sleeved on the surface of the sliding column. The spring is located between the fixed plate and the sliding block. The pressure band is clamped by two sets of clamping components on the sliding block, and the spring itself pushes the sliding block to move, so that the pressure band is straightened.

7. The visual inspection device for high colorfastness pad-dyed TR fabric products according to claim 6, characterized in that: The clamping assembly includes a screw knob that is screwed into the sliding block. The bottom end of the screw knob is rotatably connected to a clamping plate. Several pressure teeth are linearly arrayed on the bottom of the clamping plate and the top of the sliding block base plate. By rotating the screw knob, the clamping plate is moved downward, so that the clamping plate and the sliding block base plate clamp the pressure band. A limit groove is opened on one side of the sliding block. A limit block is fixedly installed on one side of the clamping plate, and the limit block slides inside the limit groove to realize the limited movement of the clamping plate.

8. The visual inspection device for high color fastness pad-dyed TR fabric products according to claim 6, characterized in that: A protective component is provided between the two circular holes and the two fixed boxes. The protective component includes a slot formed inside the circular holes and the fixed boxes. A card pad is fixedly installed inside the slot, and a protective glass is slidably inserted into the card pad.

9. A visual inspection device for high colorfastness pad-dyed TR fabrics according to claim 6, characterized in that: The separation assembly includes a base plate and two T-shaped blocks. The branch pipe is fixedly installed at the bottom of the base plate, and the two T-shaped blocks are fixedly installed on the front and rear sides of the bottom of the negative pressure box. T-shaped grooves are provided on the front and rear sides of the top of the base plate. The T-shaped blocks are slidably inserted into the interior of the T-shaped grooves, so that the negative pressure box is slidably installed on the base plate. A rubber gasket is provided between the base plate and the negative pressure box to ensure a sealed connection between the negative pressure box and the base plate.

10. A visual inspection method for high colorfastness pad-dyed TR fabric products, employing the visual inspection device for high colorfastness pad-dyed TR fabric products as described in any one of claims 1-9, characterized in that: Includes the following steps: S1: Pass the fabric body output from the unwinding unit through the pressure belt and the round hole at the top of the negative pressure box, and connect it to the winding unit; S2: Start the filter assembly. The negative pressure box generates suction through the branch pipe, which adsorbs the fabric body through the round hole. The pressure belt presses the fabric body onto the round hole. S3: Activate the vision inspection device to inspect the fabric body moving on the circular hole.

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