A machine for knitting a flat cold-dyeing fabric

Abstract

This application relates to a knitting flat-width cold dyeing machine. The knitted fabric in this application has two fabric feeding modes within the dyeing mechanism after passing through the fabric spreading and centering mechanism. In the first mode, the knitted fabric is immersed in dye solution in a dye bath. The longer contact path between the fabric and the dye solution in the bath allows for greater dye absorption, making it suitable for cold dyeing heavy fabrics. In the second mode, the dye solution is injected through a spray pipe between the uniform rollers. The shorter contact path between the fabric and the dye solution makes it suitable for cold dyeing lightweight fabrics. Simultaneously, a first and second active roller are provided, ensuring that the fabric runs closely against the first and second active rollers from the uniform rollers to the take-up roller. This prevents the rolled-up edges of the previously spread fabric from rewinding and avoids excessive tension and stretching of the fabric during operation. The knitting flat-width cold dyeing machine of this embodiment has the advantages of not requiring steam or water during the dyeing process, producing no wastewater, high production efficiency, and high-quality cold-dyed knitted fabrics.

Description

Technical Field

[0001] This application belongs to the field of dyeing and printing equipment technology, and in particular relates to a knitting flat-width cold dyeing machine. Background Technology

[0002] "Cold dyeing" is a fabric dyeing process that differs from traditional high-temperature dyeing. Its core feature is that the dyeing process is completed at room temperature or near room temperature (usually 15-30℃), without the need for additional high-temperature heating. With its advantages of energy saving, environmental protection, and minimal damage to fabrics, it is widely used in the dyeing of pure cotton, rayon, and their blended fabrics.

[0003] Chinese invention patent CN110791902A discloses a continuous cold dyeing machine for knitted fabrics, including a dyeing device, a spreading device, and a conveying device. The spreading device is located at one end of the fabric feeding end of the dyeing device, and the conveying device is located at the other end of the spreading device. The fabric can pass through the dyeing device, spreading device, and conveying device. However, this cold dyeing machine requires a dyeing tank to dye the knitted fabric, resulting in poor adaptability to different fabric types. Furthermore, a passive roller and an active roller are installed at the end of the dyeing device. The active roller pulls the knitted fabric and then pulls it to the passive roller, which can easily lead to overstretching and curling of the knitted fabric. In addition, the active roller drives the passive roller to rotate through friction, causing uneven distribution of dye on the fabric, resulting in color differences between the left, center, and right sides of the dyed fabric. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a knitting flat-width cold dyeing machine that has wide adaptability to various types of knitted fabrics and high quality, in order to overcome the shortcomings of the existing technology.

[0005] The technical solution adopted by this utility model to solve its technical problem is: A knitted fabric cold dyeing machine includes a fabric spreading and centering mechanism, a fabric dyeing mechanism, and a winding mechanism; the knitted fabric is rolled up by the winding mechanism after passing through the fabric spreading and centering mechanism and the fabric dyeing mechanism. The dyeing mechanism includes a frame with a dyeing tank for holding dye liquor. A threaded expansion roller is located at each end of the dyeing tank, and a guide roller is located inside the tank. The frame also includes a uniform roller assembly for pressing the knitted fabric, an upper threaded expansion roller, a first drive roller, and a second drive roller. A spray pipe for spraying dye liquor is located above the uniform roller assembly. The first and second drive rollers are driven to rotate by a first motor and a second motor, respectively. After passing through the spreading and centering mechanism, the knitted fabric passes through the threaded expansion roller, dyeing tank, guide roller, uniform roller group, first active roller and second active roller in sequence to reach the winding mechanism, thus forming the first fabric feeding operation mode. After passing through the spreading and centering mechanism, the knitted fabric sequentially passes through the upper threaded expansion roller, the flat expansion device, the uniform roller group, the first active roller and the second active roller to reach the winding mechanism, thus forming the second fabric feeding operation mode.

[0006] Preferably, in the knitting flat-width cold dyeing machine of this utility model, the spray pipe is located at the middle position of the active roller and the passive roller of the uniform roller group, and baffles are also provided at both ends of the active roller and the passive roller.

[0007] Preferably, in the knitting flat-width cold dyeing machine of this utility model, a baffle is provided below the uniform roller group to allow the dye liquor squeezed off the knitted fabric to flow back into the dyeing tank.

[0008] Preferably, in the knitting open-width cold dyeing machine of this utility model, the winding mechanism includes a support, a winding drive, a fabric winding roller, and a moving drive. The winding drive can drive the fabric roll to rotate; the moving drive can drive the horizontal moving table to move closer to or away from the dyeing mechanism.

[0009] Preferably, in the knitting flat-width cold dyeing machine of this utility model, a horizontal moving platform is provided below the support, the support is placed on the horizontal moving platform, the moving drive component drives the horizontal moving platform to move, the horizontal moving platform is directly driven by the moving drive component to run horizontally, and the support moves together with the horizontal moving platform.

[0010] Preferably, in the knitting flat-width cold dyeing machine of this utility model, the bottom of the horizontal moving table is provided with moving platform rollers, and a track is provided on the ground, with the moving platform rollers located inside the track.

[0011] Preferably, in the knitting flat-width cold dyeing machine of this utility model, the bottom of the support is also equipped with support rollers.

[0012] Preferably, in the knitting flat-width cold dyeing machine of this utility model, the winding drive is connected to the fabric roll roller via a coupling, and the coupling is a universal coupling.

[0013] Preferably, in the knitting flat-width cold dyeing machine of this utility model, the fabric spreading and centering mechanism includes a double-threaded spreading device arranged along the running mode of the knitted fabric, a feed roller, a centering phototube and a synchronization controller, and a feed roller motor that drives the feed roller to rotate.

[0014] The beneficial effects of this utility model are: I. This utility model discloses a flat-width cold dyeing machine for knitted fabrics. After passing through the fabric spreading and centering mechanism, the knitted fabric has two feeding modes within the dyeing mechanism. In the first mode, the knitted fabric is immersed in the dye bath, resulting in a longer contact path between the fabric and the dye bath, allowing for greater dye absorption. Therefore, this method is suitable for cold dyeing heavy fabrics. In the second mode, the dye bath is injected through a spray pipe between the uniform rollers, resulting in a shorter contact path between the fabric and the dye bath. This method is suitable for cold dyeing lightweight fabrics. Therefore, this utility model's flat-width cold dyeing machine for knitted fabrics has the advantage of wide adaptability to knitted fabrics.

[0015] Simultaneously setting up a first active roller and a second active roller ensures that the fabric runs closely against the first and second active rollers after exiting the uniform roller group and before reaching the take-up roller, preventing the rolled edges of the previously unfolded fabric from rewinding. The fabric is also driven by the first and second active rollers to avoid excessive tension and stretching of the fabric during operation.

[0016] The knitting cold dyeing machine of this application has the advantages of not requiring steam and water during the dyeing process, having no wastewater discharge, high production efficiency, and producing high-quality knitted fabrics.

[0017] Second, the winding mechanism's winding roller is also driven by a motor. When winding the fabric, it is not driven by the friction between the winding roller and the second active roller. The first active roller, the second active roller, and the winding roller after the uniform roller group do not come into contact with each other or squeeze each other. After the knitted fabric passes through the uniform roller group, the uniformity of the dye liquor on the left, center, and right sides of the fabric will not change. This ensures that the color of the dyed fabric is uniform and consistent from left to right, and there will be no quality problem of color difference from left to right. Attached Figure Description

[0018] The technical solution of this application will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of the knitting flat-width cold dyeing machine according to an embodiment of this application; Figure 2 This is a schematic diagram of the deployment and centering mechanism according to an embodiment of this application; Figure 3 This is a schematic diagram of the dyeing mechanism according to an embodiment of this application; Figure 4 This is a side view of the first drive roller according to an embodiment of this application; Figure 5 This is a front view of the winding mechanism according to an embodiment of this application; Figure 6 This is a side view of the winding mechanism according to an embodiment of this application; Figure 7 This is a schematic diagram of the first knitted fabric feeding operation method according to an embodiment of this application; Figure 8This is a schematic diagram of the second knitted fabric feeding operation method according to an embodiment of this application. The attached figures are labeled as follows: 1. Cloth cart; 2. Exhibition venues targeting Chinese institutions; 3. Dyeing facilities; 4. Receiving mechanism; 5 tracks; 8. Knitted fabric; 9. Knitted fabric rolls; 21. Double-thread expansion device; 22. Active fabric feed rollers; 23. Fabric feed drive roller motor; 24. Synchronous controller; 25 pairs of medium-sized phototubes; 30 racks; 31 Flat panel amplifier; 32 uniform roll groups; 33. Spray pipe; 34. Upper threaded expansion roller; 35. Guide rollers; 36. Dyeing vat; 37 First drive roller; 38. Second active roller; 39. Threaded expansion roller; 41. Bracket; 42. Rewind drive unit; 43. Fabric winding roller; 44. Moving drive components; 45. Support rollers; 301 baffle; 331 Baffle plate; 371 First Motor; 381 Second motor; 410 Locked disk; 411 Locking components; 412 bearing; 413 Coupling; 441 Mobile platform rollers; 442 Horizontal moving stage. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0021] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] The technical solution of this application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] Example This embodiment provides a knitting flat-width cold dyeing machine, such as Figure 1 As shown, it includes a fabric spreading and centering mechanism 2, a fabric dyeing mechanism 3, and a winding mechanism 4; the knitted fabric 8 is rolled up by the winding mechanism 4 after passing through the fabric spreading and centering mechanism 2 and the fabric dyeing mechanism 3. The dyeing mechanism 3 includes a dyeing frame 30, on which a dyeing tank 36 is provided. The dyeing tank 36 is used to hold dye liquor. A threaded expansion roller 39 (to prevent edge curling and for guiding) is provided at each of the front and rear ends of the dyeing tank 36. A guide roller 35 is provided inside the dyeing tank 36. A uniform roller group 32 (composed of an active pressure roller and a passive uniform roller) is provided on the frame 30 for squeezing the knitted fabric. It also includes an upper threaded expansion roller 34, a first active roller 37, and a second active roller 38. A spray pipe 33 capable of spraying dye liquor is provided above the uniform roller group 32. The first active roller 37 and the second active roller 38 are driven to rotate by a first motor 371 and a second motor 381, respectively. After passing through the spreading and centering mechanism 2, the knitted fabric 8 passes through the threaded expansion roller 39, dyeing tank 36, guide roller 35, uniform roller group 32, first active roller 37 and second active roller 38 in sequence to reach the winding mechanism 4, so as to form the first knitted fabric operation mode. After passing through the spreading and centering mechanism 2, the knitted fabric 8 passes through the upper threaded expansion roller 34, spray pipe 33, uniform roller group 32, first active roller 37 and second active roller 38 in sequence to reach the winding mechanism 4, so as to form the second knitted fabric operation mode.

[0025] In this embodiment of the knitting flat-width cold dyeing machine, the knitted fabric 8, after passing through the spreading and centering mechanism 2, has two knitted fabric feeding and running modes within the dyeing mechanism 3. The first knitted fabric running mode is used for cold dyeing thick fabrics, passing through the dyeing tank 36, thus enabling sufficient cold dyeing of thick fabrics. The second knitted fabric running mode is used for cold dyeing thin fabrics, using dye liquor sprayed from the spray pipe 33 for cold dyeing, improving dyeing efficiency. Simultaneously, the first motor 371 and the second motor 381 drive the first drive roller 37 and the second drive roller 38 respectively, so that the knitted fabric runs closely against the first drive roller 37 and the second drive roller 38 between exiting the uniform roller group and the take-up roller, preventing the previously spread knitted fabric edges from curling back. The running of the knitted fabric driven by the first drive roller 37 and the second drive roller 38 also avoids excessive tension on the fabric during operation.

[0026] The threaded expansion roller 39 adjusts the movement of the knitted fabric 8 and prevents it from curling. The two threaded expansion rollers 39 and the guide roller 35 cause the knitted fabric 8 to form a U-shaped bend in the dyeing tank 36, allowing the knitted fabric 8 to be fully cold-dyed. The active and passive pressure rollers of the uniform roller group 32 work together to squeeze out excess dye liquor from the knitted fabric 8 and allow it to flow into the dyeing tank 36. The uniform roller group 32 saves dye liquor by recycling it and also distributes the dye liquor evenly to the fabric again through squeezing, improving the dyeing uniformity of the knitted fabric 8. The dyeing machine frame 30 is equipped with a first motor 371 that drives the first active roller 37 to rotate, a second motor 381 that drives the second active roller 38 to rotate, and the active pressure roller of the uniform roller group 32 is also driven by a third motor (not shown in the figure).

[0027] Furthermore, the spray pipe 33 is positioned at the midpoint between the active and passive pressure rollers of the uniform roller assembly 32, and is used to spray the knitted fabric 8 before extrusion. Both ends of the active and passive rollers are also equipped with baffle plates 331. The baffle plates 331 prevent the dye liquor flowing from the spray pipe 33 from leaking to both ends of the uniform roller assembly 32. The baffle plates 331 at both ends close together when in operation and can be separated to the sides during normal operation (thus not affecting the operation of the first knitted fabric).

[0028] A baffle 301 is provided below the uniform roller group 32 to direct the dye flowing down the squeezed knitted fabric into the dyeing tank 36. The baffle 301 is located on the left and right sides below the uniform roller group 32.

[0029] It should be noted that both the guide roller 35 and the threaded expansion roller 39 are driven by motors.

[0030] Furthermore, the winding mechanism 4, such as Figure 5 and 6 As shown, it includes a support 41, a winding drive 42, a fabric winding roller 43, and a moving drive 44; The winding drive 42 can drive the fabric roll 43 to rotate; the moving drive 44 can drive the bracket 41 to move closer to or away from the dyeing mechanism 3.

[0031] The winding mechanism 4's winding roller 43 is also equipped with a winding drive 42 (motor) to drive rotation. When winding the fabric, it is not driven by the friction between the winding roller 43 and the second active roller 38. The first active roller 37, the second active roller 38, and the winding roller 43 after the uniform roller group do not come close to each other or squeeze each other. After the knitted fabric passes through the uniform roller group 43, the uniformity of the dye liquor on the left, middle, and right sides of the fabric will not change, which can ensure the uniformity of the color of the dyed fabric on the left, middle, and right sides and will not produce quality problems of color difference on the left, middle, and right sides.

[0032] The winding drive 42 drives the fabric roll 43 to rotate, which can roll the knitted fabric into a knitted fabric roll 9. As the knitted fabric is gradually wound up, the thickness of the knitted fabric roll 9 increases, and the distance between the surface of the knitted fabric roll 9 and the dyeing mechanism 3 will decrease. Therefore, it is necessary to move the drive 44 to drive the bracket 41 away from the dyeing mechanism 3, so that the distance between the surface of the knitted fabric roll 9 and the dyeing mechanism 3 is kept at a constant value.

[0033] A horizontal moving platform 442 is provided below the bracket 41. The bracket 41 is placed on the horizontal moving platform 442. The moving drive component 44 drives the horizontal moving platform 442 to move. The horizontal moving platform 442 is directly driven by the horizontal moving platform 442 to move horizontally. The bracket 41 moves together with the horizontal moving platform 442.

[0034] The bottom of the horizontal moving platform 442 is provided with moving platform rollers 441, and a track 5 is provided on the ground. The moving platform rollers 441 are located in the track 5 and are restricted by the track 5.

[0035] The two ends of the fabric rolling roller 43 are mounted on the bracket 41 via bearings 412.

[0036] The fabric roll 43 is provided with a locking member 411 at one end. By tightening the locking member 411, it can cooperate with the locking disc 410 at one end of the fabric roll 43 to prevent the fabric roll 43 from rotating. When it is necessary to move the fabric roll 43 away, it is necessary to lock the fabric roll 43 to prevent it from rotating.

[0037] The bottom of the bracket 41 is also equipped with bracket rollers 45. After the cloth rolling roller 43 is unlocked, one side of the bracket 41 can be lifted and the bracket 41 can be transported away.

[0038] The winding drive component 42 is a motor, and the moving drive component 44 is a cylinder or a hydraulic cylinder.

[0039] The winding drive 42 is connected to the fabric roll 43 via a coupling 413. The fabric roll 43 is connected to the coupling 413 via a pin. By removing the pin, the connection between the coupling 413 and the fabric roll 43 can be disconnected, thereby facilitating the movement of the support 41.

[0040] The coupling 413 is a universal coupling, which ensures smooth operation even when there is a positional difference between the winding drive 42 and the fabric roll 43. A ramp is also provided on one side of the horizontal moving table 442 to facilitate the movement of the support 41.

[0041] The fabric spreading and centering mechanism 2 includes a double-threaded expansion device 21 arranged along the running path of the knitted fabric, a feed roller 22, a centering phototube 25, a synchronization controller 24, and a feed roller motor 23 that drives the feed roller 22 to rotate. When the feed roller 22 rotates, it pulls the knitted fabric 8 into the dyeing mechanism 3 and can also move left and right according to the signal fed back by the centering phototube 25, ensuring that the knitted fabric 8 remains in the center position of the equipment during operation without deviating. The double-threaded expansion device 21 and the synchronization controller 24 are existing structures, and their specific structures will not be described in detail here.

[0042] The knitted fabric 8 is connected to the upper threaded expansion roller 34 or the threaded expansion roller 39 via the synchronous controller 24.

[0043] It should be noted that the front of the display centering mechanism 2 is the fabric conveying mechanism. Figure 1 The diagram uses a cloth cart (1) as an example.

[0044] The first knitted fabric operation mode is used for cold dyeing of thick fabrics. Because it passes through dye bath 36, the thick fabric can be thoroughly cold dyed. The knitted fabric's movement is as follows: Figure 7 As shown, the red line represents the operation mode of the knitted fabric.

[0045] The second knitted fabric operation mode is used for cold dyeing of thin fabrics. Dye liquor is sprayed through spray pipe 33 for cold dyeing, improving dyeing efficiency. The movement of the knitted fabric is as follows: Figure 8As shown, the red line represents the operation mode of the knitted fabric.

[0046] It is important to note that the rotation mode of the uniform roller group 32, the first drive roller 37 and the second drive roller 38 needs to be changed according to the actual situation, and the rotation modes are different for the first knitted fabric running mode and the second knitted fabric running mode.

[0047] A fabric adjusting component 31 is also provided between the upper threaded expansion roller 34 and the uniform roller group 32. The fabric adjusting component 31 is used to adjust the position of the knitted fabric in the axial direction of the fabric adjusting component 31.

[0048] Based on the above-described preferred embodiments according to this application, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this application. The technical scope of this application is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A knitting open-width cold dyeing machine, characterized in that, It includes a fabric spreading and centering mechanism (2), a fabric dyeing mechanism (3), and a winding mechanism (4); the knitted fabric (8) is rolled up by the winding mechanism (4) after passing through the fabric spreading and centering mechanism (2) and the fabric dyeing mechanism (3); The dyeing mechanism (3) includes a frame (30), on which a dyeing tank (36) is provided. The dyeing tank (36) is used to hold dye liquor. A threaded expansion roller (39) is provided at each of the front and rear ends of the dyeing tank (36). A guide roller (35) is provided inside the dyeing tank (36). A uniform roller group (32) for squeezing the knitted fabric is provided on the frame (30), along with an upper threaded expansion roller (34), a first active roller (37), and a second active roller (38). A spray pipe (33) capable of spraying out dye liquor is provided above the uniform roller group (32). The first active roller (37) and the second active roller (38) are driven to rotate by a first motor (371) and a second motor (381), respectively. After passing through the spreading and centering mechanism (2), the knitted fabric (8) passes through the threaded expansion roller (39), dyeing tank (36), guide roller (35), uniform roller group (32), first active roller (37) and second active roller (38) in sequence to reach the winding mechanism (4) to form the first fabric threading operation mode. After passing through the spreading and centering mechanism (2), the knitted fabric (8) passes through the upper threaded expansion roller (34), the flat expansion device (31), the uniform roller group (32), the first active roller (37), and the second active roller (38) in sequence to reach the winding mechanism (4) to form the second fabric feeding operation mode.

2. The knitting open-width cold dyeing machine according to claim 1, characterized in that, The spray pipe (33) is located at the middle position of the active roll and the passive roll of the uniform roll group (32), and the two ends of the active roll and the passive roll are also provided with baffles (331).

3. The knitting open-width cold dyeing machine according to claim 1, characterized in that, A baffle (301) is provided below the uniform roller group (32) to allow the dye liquor squeezed off the knitted fabric to flow back into the dyeing tank (36).

4. The knitting open-width cold dyeing machine according to claim 1, characterized in that, The winding mechanism (4) includes a bracket (41), a winding drive (42), a fabric roll (43), and a moving drive (44). The winding drive (42) can drive the fabric roll (43) to rotate; the moving drive (44) can drive the horizontal moving table (442) to move closer to or further away from the dyeing mechanism (3).

5. The knitting open-width cold dyeing machine according to claim 4, characterized in that, A horizontal moving platform (442) is provided below the bracket (41). The bracket (41) is placed on the horizontal moving platform (442). The moving drive (44) drives the horizontal moving platform (442) to move. The horizontal moving platform (442) is directly driven by the moving drive (44) to run horizontally. The bracket (41) runs together with the horizontal moving platform (442).

6. The knitting open-width cold dyeing machine according to claim 5, characterized in that, The bottom of the horizontal moving platform (442) is provided with moving platform rollers (441), and a track (5) is provided on the ground. The moving platform rollers (441) are located in the track (5).

7. The knitting open-width cold dyeing machine according to claim 5, characterized in that, The bottom of the bracket (41) is also equipped with bracket rollers (45).

8. The knitting open-width cold dyeing machine according to claim 4, characterized in that, The winding drive (42) is connected to the fabric roll (43) via a coupling (413), which is a universal coupling.

9. The knitting open-width cold dyeing machine according to claim 1, characterized in that, The fabric spreading and centering mechanism (2) includes a double-threaded expansion device (21) arranged along the running mode of the knitted fabric, a fabric feeding drive roller (22), a centering phototube (25) and a synchronization controller (24), and a fabric feeding drive roller motor (23) that drives the fabric feeding drive roller (22) to rotate.

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