Dyeing fabric defect repairing device and method

Abstract

The invention relates to the technical field of dyed fabric repairing, and provides a dyed fabric defect repairing device and method.The dyed fabric defect repairing device comprises a working table, the working table is provided with an identifying and positioning mechanism, a dyeing supplementing mechanism and a color fixing mechanism, and the lengths of working areas of the identifying and positioning mechanism, the dyeing supplementing mechanism and the color fixing mechanism are consistent in the fabric conveying direction; the dyed fabric is intermittently conveyed according to the length of an operation area of the identifying and positioning mechanism, and the color fixing mechanism comprises a steam generator and a steam spraying assembly which only applies steam to defect areas of the fabric; defects on the fabric are identified and positioned through the identifying and positioning mechanism, the fabric defects are subjected to complementary dyeing through the complementary dyeing mechanism, color fixing is conducted through the color fixing mechanism after complementary dyeing, and the color fixing action specifically comprises the steps that steam is conveyed into the steam spraying assembly through the steam generator, steam is only applied to the fabric defect areas in a targeted mode through the steam spraying assembly, and the fabric defects are subjected to complementary dyeing through the complementary dyeing mechanism. Energy waste is avoided, and the situation that steam is applied to the non-defect area of the fabric, and consequently the color light stability is affected is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of dyeing fabric repair, and in particular to a device and method for repairing defects on dyed fabrics. Background Art

[0002] During the fabric dyeing and processing, due to factors such as uneven dye penetration, abnormal mechanical contact, or process parameter fluctuations, various dyeing defects are likely to occur on the fabric surface, such as white spots where local areas are not dyed, color differences, and abnormal color distribution caused by creases. These defects seriously affect the appearance quality and commercial value of the fabric and need to be identified through quality inspection and repaired.

[0003] With the development of intelligent technology, fabric defect detection technology based on machine vision and image processing has gradually become popular, which can efficiently locate the position, size, and type of defects, providing a basis for precise repair. In the repair process, for the detected defect area, local dyeing needs to be carried out, and after dyeing, steam fixation is performed. However, the existing steam fixation process still follows the traditional mode, that is, the entire section of the fabric is subjected to undifferentiated steam treatment through a steaming box. Although this method can ensure the full combination of dye molecules and fibers, there are the following problems: First, the steam cannot be applied directionally to the dyed area, resulting in a large amount of heat energy being consumed in the non-defective area, causing energy waste; Second, the steam treatment may cause slight hydrolysis or thermal migration of the original color of the fabric, affecting the color light stability of the non-repaired area.

[0004] Therefore, the present invention proposes a device and method for repairing defects on dyed fabrics to solve the above problems. Summary of the Invention

[0005] The purpose of the embodiments of the present invention is to provide a device and method for repairing defects on dyed fabrics to solve the above problems.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A device for repairing defects on dyed fabrics includes an operation table, and the dyed fabric is transmitted through the operation table. Along the transmission direction of the dyed fabric on the operation table, there are successively arranged an identification and positioning mechanism for identifying and positioning defects on the fabric, a dyeing and replenishing mechanism for replenishing the defects on the fabric, and a fixation mechanism for fixation after dyeing and replenishing. The working areas of the identification and positioning mechanism, the dyeing and replenishing mechanism, and the fixation mechanism are the same in length in the fabric transmission direction. The dyed fabric is intermittently transmitted according to the length of the working area of the identification and positioning mechanism. The fixation mechanism includes a steam generator and a steam spraying component that only applies steam to the defect area of the fabric.

[0008] In an alternative solution: an installation member is provided on the workbench, and the identification and positioning mechanism includes a cross beam provided on the installation member and spanning the fabric transmission path. A plurality of industrial cameras and fill lights are arranged in a row on the cross beam, and the industrial cameras and fill lights are arranged alternately.

[0009] In an alternative solution: the re-dyeing mechanism is provided on the installation member, and the re-dyeing mechanism includes a printing machine and a driving component for moving the printing machine along the fabric transmission direction.

[0010] In an alternative solution: the steam spraying component includes a box body provided below the fabric transmission path. The interior of the box body is separated into a first chamber and a second chamber by a partition. A plurality of pipe fittings that penetrate through the upper side of the box body in a sealed manner are evenly distributed in the second chamber. An internally hollow contact member is provided at the upper end of the pipe fitting, and the pipe fitting is communicated with the contact member. Steam outlet holes are evenly distributed on the upper side of the contact member. A limiting piece is provided on the pipe section of the pipe fitting located in the second chamber. An elastic member is provided between the limiting piece and the partition. An iron piece is further provided at the lower end of the pipe fitting. An electromagnet corresponding to each pipe fitting is provided in the first chamber.

[0011] In an alternative solution: a rubber pad is provided on the bottom side of the second chamber.

[0012] In an alternative solution: the steam spraying component can reciprocate, and the color fixing mechanism further includes a reciprocating component for realizing the reciprocating movement of the steam spraying component.

[0013] In an alternative solution: the reciprocating component includes an installation cavity provided on the workbench. The steam spraying component is provided in the installation cavity. A sliding rod that penetrates through one side of the installation cavity is provided on the box body. The radial cross section of the sliding rod is non-circular. A convex platform is further provided on the box body. A strip-shaped groove is provided on the convex platform. A cam and a driving member for driving the cam to rotate are further provided in the installation cavity. A column adapted to the strip-shaped groove is provided on the cam, and one end of the column away from the cam passes through the strip-shaped groove.

[0014] In an alternative solution: a steam inlet channel for steam to enter the second chamber is provided in the sliding rod. A connecting steam pipe is provided between the output end of the steam generator and the steam inlet channel.

[0015] In an alternative solution: a pressing member is further provided directly above the steam spraying component for cooperating with the contact member to press the fabric defect area. Through holes are evenly distributed on the pressing member. A telescopic member for driving the pressing member to move up and down is provided on the installation member.

[0016] A method for repairing fabric defects in dyed fabrics, using the fabric defect repair device for dyed fabrics according to any one of the above technical solutions, includes the following steps:

[0017] S1: Intermittently transfer the dyed fabric;

[0018] S2: The dyed fabric passes through the identification and positioning mechanism, the replenishing and dyeing mechanism, and the color fixation mechanism. The identification and positioning mechanism identifies and locates the defects on the fabric, the replenishing and dyeing mechanism replenishes and dyes the defects on the fabric, and the color fixation mechanism fixes the color after replenishing and dyeing. The specific color fixation action is as follows: Steam is delivered to the steam spraying assembly through the steam generator, and then the steam spraying assembly specifically applies steam only to the defective area of the fabric.

[0019] Compared with the prior art, the beneficial effects of the embodiments of the present invention are as follows:

[0020] The dyed fabric is intermittently transferred through the identification and positioning mechanism, the replenishing and dyeing mechanism, and the color fixation mechanism in sequence. The identification and positioning mechanism identifies and locates the defects on the fabric, the replenishing and dyeing mechanism replenishes and dyes the defects on the fabric, and the color fixation mechanism fixes the color after replenishing and dyeing. The specific color fixation action is as follows: Steam is delivered to the steam spraying assembly through the steam generator, and then the steam spraying assembly specifically applies steam only to the defective area of the fabric, which not only avoids energy consumption waste but also avoids the influence of the non-defective area of the fabric being applied with steam on the color light stability.

[0021] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. Brief Description of the Drawings

[0022] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments that conform to this application, and are used together with the specification to explain the principles of this application. At the same time, these drawings and the text description are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments.

[0023] Figure 1 It is a schematic structural diagram of the embodiment of the present invention.

[0024] Figure 2 For Figure 1 The enlarged view of part A in

[0025] Figure 3 It is a schematic diagram of the setting among the pipe fitting, the abutting member, and the elastic member in the embodiment of the present invention.

[0026] Figure 4 It is a top view of the steam spraying assembly in the embodiment of the present invention.

[0027] Figure 5 For Figure 1 The enlarged view of part B in

[0028] Figure 6 It is a schematic structural diagram of the pressing member in the embodiment of the present invention.

[0029] Annotation of reference numerals: 1 - operating table, 2 - industrial control center, 3 - feeding mechanism, 4 - mounting member, 5 - identification and positioning mechanism, 501 - cross beam, 502 - industrial camera, 6 - dye replenishing mechanism, 601 - printing machine, 602 - driving component, 7 - color fixing mechanism, 701 - steam generator, 702 - steam guide pipe, 703 - steam spraying component, 7031 - box body, 7032 - partition board, 7033 - first chamber, 7034 - second chamber, 7035 - pipe fitting, 7036 - electromagnet, 7037 - rubber pad, 7038 - abutting member, 7039 - steam outlet hole, 70310 - limiting piece, 70311 - elastic member, 70312 - iron piece, 704 - pressing member, 705 - telescopic member, 706 - reciprocating component, 7061 - convex platform, 7062 - strip groove, 7063 - cam, 7064 - column, 7065 - sliding rod, 7066 - mounting cavity, 707 - steam inlet passage, 709 - through hole. Detailed implementation manners

[0030] The present application will be further described in detail below with reference to the accompanying drawings. It is necessary to point out here that the following detailed implementation manners are only used to further illustrate the present application and cannot be understood as a limitation on the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0031] Please refer to Figure 1 , a device for repairing defects of dyed fabrics, including an operating table 1. The dyed fabric is transmitted past the operating table 1. An identification and positioning mechanism 5 for identifying and positioning defects on the fabric, a dye replenishing mechanism 6 for replenishing the defects of the fabric, and a color fixing mechanism 7 for fixing the color after replenishing are sequentially arranged on the operating table 1 along the transmission direction of the dyed fabric. The operating areas of the identification and positioning mechanism 5, the dye replenishing mechanism 6, and the color fixing mechanism 7 are the same in length in the fabric transmission direction (the width of the operating area completely covers the width of the fabric). The dyed fabric is intermittently transmitted according to the length of the operating area of the identification and positioning mechanism 5. The color fixing mechanism 7 includes a steam generator 701 and a steam spraying component 703 that only applies steam to the defect area of the fabric.

[0032] It should be noted that the intermittent transmission of the dyed fabric according to the working area length of the recognition and positioning mechanism 5 means that: when the fabric is transported to the above length, it stops for a certain period of time. During this period, the recognition and positioning mechanism 5, the replenishing and dyeing mechanism 6, and the color fixation mechanism 7 perform corresponding actions on the corresponding fabric section. Since the working areas of the recognition and positioning mechanism 5, the replenishing and dyeing mechanism 6, and the color fixation mechanism 7 are of the same length in the fabric transport direction, the recognition and positioning station, the replenishing and dyeing station, and the color fixation station are seamlessly connected. For example, if the working area length of the recognition and positioning mechanism 5 is two meters, the fabric stops for a certain period of time every 2 meters of transmission. A new fabric section enters the working area of the recognition and positioning mechanism 5 (i.e., the recognition and positioning station), the fabric section recognized and positioned by the recognition and positioning mechanism 5 enters the working area of the replenishing and dyeing mechanism 6 (i.e., the replenishing and dyeing station), and the fabric section replenished and dyed by the replenishing and dyeing mechanism 6 enters the working area of the color fixation mechanism 7 (i.e., the color fixation station), and so on in a cycle. The fabric stop transmission time is determined by the longest operation time (including mechanism reset) among the recognition and positioning mechanism 5, the replenishing and dyeing mechanism 6, and the color fixation mechanism 7. For example, if the recognition and positioning mechanism 5 takes 3 seconds for recognition and positioning, the replenishing and dyeing mechanism 6 needs 1 minute to replenish and dye the defects recognized on the previous fabric section, and the color fixation mechanism 7 needs 30 seconds to fix the color of the previously replenished and dyed defect area, then the fabric stops transmitting for 1 minute this time, and so on.

[0033] The dyed fabric is intermittently transmitted through the recognition and positioning mechanism 5, the replenishing and dyeing mechanism 6, and the color fixation mechanism 7 in sequence. The defects on the fabric are recognized and positioned by the recognition and positioning mechanism 5 (including recognizing the contour size of the defects), the defects on the fabric are replenished and dyed by the replenishing and dyeing mechanism 6, and the color is fixed after replenishing and dyeing by the color fixation mechanism 7. The specific color fixation action is: steam is supplied from the steam generator 701 to the steam spraying component 703, and then the steam spraying component 703 only applies steam specifically to the fabric defect area, which not only avoids energy consumption waste but also avoids the steam being applied to the non-defect area of the fabric and affecting the color light stability.

[0034] Furthermore, the defect repair device further includes an industrial control center 2 (i.e., the control center) to realize the automatic operation of the device.

[0035] Furthermore, the defect repair device further includes a feeding mechanism 3 for realizing the intermittent transmission of the yarn. The feeding mechanism 3 includes two rollers (the dyed fabric is located between the two rollers, and a gear transmission structure is provided between the two feeding wheels) and a driving member (such as a servo motor, a reduction motor, etc.) for driving the two feeding wheels to rotate intermittently in opposite directions.

[0036] Please refer to Figure 1, in an embodiment of the present invention, an installation member 4 is provided on the working table 1. The identification and positioning mechanism 5 includes a cross beam 501 provided on the installation member 4 and spanning the fabric transmission path. A plurality of industrial cameras 502 and supplementary light lamps (not shown in the figure) are arranged in a row on the cross beam 501, and the industrial cameras 502 and the supplementary light lamps are arranged alternately. In this embodiment, the positioning mechanism 5 is implemented based on industrial vision technology. The industrial camera 502 is used to obtain the image information of the dyed fabric to identify defects and position them. The corresponding image processing technology and algorithms are prior arts and will not be elaborated herein.

[0037] Please refer to Figure 1 , in an embodiment of the present invention, the supplementary dyeing mechanism 6 is provided on the installation member 4. The supplementary dyeing mechanism 6 includes a printing machine 601 and a driving component 602 for moving the printing machine 601 along the fabric transmission direction. The printing machine 601 is a digital printing machine and spans the fabric. The supplementary dyeing mechanism 6 operates based on the defect information data obtained by the identification and positioning mechanism 5 and is controlled by the above industrial control center 2. The driving component 602 includes a servo motor, transmission and guiding components (such as ball screw and nut pair, linear chute and slider, synchronous belt and pulley, etc.), structural support and connection components, etc. The connection and cooperation between the above components are prior arts and will not be elaborated herein. The driving component 602 drives the printing machine 601 to move along the fabric transmission direction (transverse) to adjust the position of the nozzle of the printing machine 601 in this direction. The adjustment of the longitudinal position of the nozzle of the printing machine 601 is carried by the printing machine 601 itself. The combination of transverse and longitudinal directions enables arbitrary adjustment of the nozzle position on the plane to be able to perform supplementary dyeing on defects at any position on the fabric.

[0038] Please refer to Figures 1 to 4 , in an embodiment of the present invention, the steam spraying component 703 includes a box body 7031 provided below the fabric transmission path. The interior of the box body 7031 is divided into a first chamber 7033 and a second chamber 7034 by a partition 7032. A plurality of pipe fittings 7035 that penetrate through the upper side of the box body 7031 in a sealed manner are evenly arranged in the second chamber 7034. An internally hollow contact member 7038 is provided at the upper end of the pipe fitting 7035, and the pipe fitting 7035 is communicated with the contact member 7038. Steam outlet holes 7039 are evenly arranged on the upper side of the contact member 7038. A limiting piece 70310 is provided on the pipe section of the pipe fitting 7035 located in the second chamber 7034. An elastic member 70311 is provided between the limiting piece 70310 and the partition 7032. The elastic member 70311 is a compression spring. An iron member 70312 is further provided at the lower end of the pipe fitting 7035. An electromagnet 7036 corresponding to the pipe fitting 7035 is provided in the first chamber 7033;

[0039] A rubber pad 7037 is provided on the inner bottom side of the second chamber 7034 , and the steam generator 701 delivers steam to the second chamber 7034 .

[0040] In this embodiment, the abutting parts 7038 are pixel-spliced and distributed. This embodiment also operates based on the defect information data obtained by the identification and positioning mechanism 5. According to the defect outline size and the located defect position identified by the identification and positioning mechanism 5, the industrial control center 2 controls the corresponding electromagnet 7036 to be powered off (when the color fixing operation is not performed, the electromagnet 7036 is powered on to absorb the corresponding iron part 70312, so that the lower end of the pipe 7035 is tightly against the rubber pad 7037, which plays a role in sealing the lower end of the pipe 7035 to prevent steam from entering the pipe 70 35), after the power is cut off, the electromagnet 7036 no longer magnetically attracts the corresponding iron part 70312, and the corresponding pipe 7035 moves upward under the action of the elastic part 70311 until the limit plate 70310 abuts against the top side of the second chamber 7034. In this state, the upper side of the corresponding abutment 7038 contacts the fabric, thereby covering the defective area of the fabric. The lower end of the pipe 7035 is opened after the upward movement, and the steam transported to the second chamber 7034 enters the abutment 7038 through the corresponding pipe 7035, and then is discharged through the steam outlet 7039 to penetrate the defective area of the fabric to achieve color fixation.

[0041] Furthermore, in the present embodiment, the power of the steam generator 1 is adjustable, and automatic adjustment is performed according to the defect information data obtained by the identification and positioning mechanism 5 (through the industrial control center 2). For example, the larger the identified defect area, the larger the corresponding re-dyeing area, the larger the corresponding steam fixation area, the more resistance members 7038 in contact with the defect area, and the more steam required per unit time. That is, the power of the steam generator 1 needs to be appropriately increased to meet the steam volume and pressure required for fixation. Otherwise, the power of the steam generator 1 needs to be appropriately reduced.

[0042] Furthermore, in this embodiment, the outer layer of the iron part 70312 is coated with a waterproof film to avoid rust due to long-term contact with steam. In addition, the partition 7032 is a non-magnetic plate to ensure that the electromagnet 7036 can magnetically attract the iron part 70312 when energized.

[0043] Based on the previous embodiment, please refer to Figure 1 , Figure 2 and Figure 5 In one embodiment of the present invention, the steam spray component 703 is capable of reciprocating motion, and the color fixing mechanism 7 further includes a reciprocating component 706 for realizing the reciprocating motion of the steam spray component 703;

[0044] The reciprocating assembly 706 includes an installation cavity 7066 provided on the operating table 1. The steam spraying assembly 703 is disposed in the installation cavity 7066. A slide bar 7065 is provided on the box body 7031 and penetrates through one side of the installation cavity 7066 in a sliding manner. The radial cross-section of the slide bar 7065 is non-circular. A convex platform 7061 is further provided on the box body 7031, and a strip-shaped groove 7062 is provided on the convex platform 7061. A cam 7063 and a driving member (not shown in the figure, which is a servo motor, a reduction motor, etc. in the prior art) for driving the cam 7063 to rotate are further provided in the installation cavity 7066. A column 7064 adapted to the strip-shaped groove 7062 is provided on the cam 7063, and one end of the column 7064 away from the cam 7063 penetrates through the strip-shaped groove 7062;

[0045] An intake passage 707 for steam to enter the second chamber 7034 is provided in the slide bar 7065. A steam guide pipe 702 is provided for connection between the output end of the steam generator 701 and the intake passage 707.

[0046] In this embodiment, when fixing the color, the steam spraying assembly 703 is in a reciprocating motion state. Specifically, under the combined action of the cooperation between the column 7064 and the strip-shaped groove 7062 and the limiting action of the slide bar 7065, the driving member drives the cam 7063 to rotate to drive the whole steam spraying assembly 703 to reciprocate, that is, the abutting member 7038 reciprocates, so that the sprayed steam can uniformly penetrate into the fabric defect area, improving the color fixing effect; it should be noted that the reciprocating motion amplitude of the steam spraying assembly 703 is small, that is, the degree to which the abutting member 7038 moves beyond the defect area is small, and it will not cause a substantial impact on the overall color light stability of the fabric.

[0047] Based on the previous embodiment, please refer to Figure 1 and Figure 6 , a pressing member 704 is further provided directly above the steam spraying assembly 703 for cooperating with the abutting member 7038 to press the fabric defect area. Through holes 708 are uniformly distributed on the pressing member 704. A telescopic member 705 for driving the pressing member 704 to move up and down is provided on the mounting member 4, and the telescopic member 705 is an electric telescopic rod.

[0048] In this embodiment, after arranging the transmission of the dyed fabric, the telescopic member 705 extends to drive the pressing member 704 to press down until it contacts the fabric, so that when the abutting member 7038 moves up to contact the fabric, it cooperates with the pressing member 704 to play a role in pressing the fabric defect area. Combined with the application of steam and the reciprocating movement of the abutting member 7038, an ironing-like effect is achieved, further improving the color fixing effect. The steam passing through the fabric is discharged through the through holes 708.

[0049] The present invention also provides a method for repairing defects of dyed fabrics. Using the dyed fabric defect repair device described in any one of the above technical solutions, the method includes the following steps:

[0050] S1: Intermittently transporting the dyed fabric;

[0051] S2: The dyed fabric passes through the recognition and positioning mechanism 5, the supplementary dyeing mechanism 6, and the color fixation mechanism 7. The recognition and positioning mechanism 5 recognizes and locates the defects on the fabric, the supplementary dyeing mechanism 6 performs supplementary dyeing on the fabric defects, and the color fixation mechanism 7 performs color fixation after supplementary dyeing. The specific color fixation operation is as follows: Steam is conveyed from the steam generator 701 to the steam spraying assembly 703, and then the steam spraying assembly 703 specifically applies steam only to the defect area of the fabric.

[0052] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for repairing defects on a dyed fabric, comprising an operating table (1), and the dyed fabric is transmitted through the operating table (1). An identification and positioning mechanism (5) for identifying defects on the fabric and positioning them, a supplementary dyeing mechanism (6) for supplementary dyeing the fabric defects, and a color fixation mechanism (7) for color fixation after supplementary dyeing are successively arranged on the operating table (1) along the transmission direction of the dyed fabric. It is characterized in that, The working areas of the identification and positioning mechanism (5), the supplementary dyeing mechanism (6), and the color fixation mechanism (7) are of the same length in the fabric transmission direction. The dyed fabric is intermittently transmitted according to the length of the working area of the identification and positioning mechanism (5). The color fixation mechanism (7) includes a steam generator (701) and a steam spraying assembly (703) that only applies steam to the fabric defect area.

2. The fabric defect repair device for dyed fabrics according to claim 1, characterized in that, An installation member (4) is provided on the workbench (1). The identification and positioning mechanism (5) includes a cross beam (501) provided on the installation member (4) and spanning the fabric transmission path. A number of industrial cameras (502) and supplementary light lamps are arranged in a row on the cross beam (501), and the industrial cameras (502) and the supplementary light lamps are arranged alternately.

3. The fabric defect repair device for dyed fabrics according to claim 2, characterized in that, The supplementary dyeing mechanism (6) is provided on the installation member (4). The supplementary dyeing mechanism (6) includes a printing machine (601) and a driving assembly (602) for moving the printing machine (601) along the fabric transmission direction.

4. The fabric defect repair device for dyed fabrics according to claim 2, wherein, The steam spraying assembly (703) includes a box body (7031) provided below the fabric transmission path. The interior of the box body (7031) is divided into a first chamber (7033) and a second chamber (7034) by a partition plate (7032). Pipe fittings (7035) that are hermetically penetrated through the upper side of the box body (7031) are evenly distributed in the second chamber (7034). An internally hollow contact member (7038) is provided at the upper end of the pipe fitting (7035), and the pipe fitting (7035) is communicated with the contact member (7038). Steam outlet holes (7039) are evenly distributed on the upper side of the contact member (7038). A limiting piece (70310) is provided on the pipe section of the pipe fitting (7035) located in the second chamber (7034). An elastic member (70311) is provided between the limiting piece (70310) and the partition plate (7032). An iron piece (70312) is further provided at the lower end of the pipe fitting (7035). An electromagnet (7036) corresponding to the pipe fitting (7035) one by one is provided in the first chamber (7033).

5. The fabric defect repair device for dyed fabrics according to claim 4, wherein A rubber pad (7037) is provided on the inner bottom side of the second chamber (7034).

6. The fabric defect repair device for dyed fabrics according to claim 4, characterized in that The steam spraying assembly (703) can reciprocate. The color fixation mechanism (7) further includes a reciprocating assembly (706) for realizing the reciprocating movement of the steam spraying assembly (703).

7. The fabric defect repair device for dyed fabrics according to claim 6, characterized in that, The reciprocating component (706) comprises an installation cavity (7066) arranged on the workbench (1), the steam spray component (703) is arranged in the installation cavity (7066), the box body (7031) is provided with a slide bar (7065) which slides through one side of the installation cavity (7066), the radial cross section of the slide bar (7065) is non-circular, the box body (7031) is also provided with a boss (7061), the boss (7061) is provided with a strip groove (7062), the installation cavity (7066) is also provided with a cam (7063) and a driving member for driving the cam (7063) to rotate, the cam (7063) is provided with a column (7064) adapted to the strip groove (7062), and the end of the column (7064) away from the cam (7063) passes through the strip groove (7062).

8. The fabric defect repair device for dyed fabrics according to claim 7, characterized in that, The sliding rod (7065) is provided with a steam inlet channel (707) for steam to enter the second chamber (7034), and a steam guide pipe (702) communicating with the steam inlet channel (707) is provided between the output end of the steam generator (701).

9. The fabric defect repair device for dyed fabrics according to claim 4, wherein, A pressure piece (704) is also provided directly above the steam spray assembly (703) for cooperating with the resistance piece (7038) to suppress the fabric defect area. Through holes (708) are evenly distributed on the pressure piece (704). A telescopic piece (705) for driving the pressure piece (704) to move up and down is provided on the mounting piece (4).

10. A method for repairing defects of dyed fabrics, using the device for repairing defects of dyed fabrics according to any one of claims 1-9 above, characterized in that, The following steps are involved: S1: intermittent transmission of dyed fabrics; S2: The dyed fabric passes through the identification and positioning mechanism (5), the re-dyeing mechanism (6) and the color fixing mechanism (7). The defects on the fabric are identified and located by the identification and positioning mechanism (5), the re-dyeing mechanism (6) re-dye the defects on the fabric, and the color fixing mechanism (7) fixes the colors after re-dyeing. The color fixing action is specifically as follows: steam is transported to the steam spray component (703) through the steam generator (701), and then steam is applied only to the defective area of the fabric through the steam spray component (703).

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