Open-width reciprocating pad dyeing machine

Abstract

The invention provides an open-width reciprocating pad dyeing machine, and belongs to the technical field of fiber dyeing. Comprising an immersion liquid tank and a heavy padder, the heavy padder is located above the immersion liquid tank, the heavy padder and the immersion liquid tank are communicated and integrally arranged, the immersion liquid tank is provided with an upper net belt and a lower net belt in a matched mode, and loose fibers are clamped by the upper net belt and the lower net belt, fed into the immersion liquid tank and subjected to translational reciprocating immersion liquid and then enter the heavy padder. Excessive immersion liquid in the loose fibers is rolled out and completely flows back into the immersion liquid tank to be recycled, the loose fibers subjected to liquid rolling are sent out to be subjected to padding dyeing, and continuous and uniform dyeing of the loose fibers is completed.

Description

Technical Field

[0001] The present application relates to a flat-width reciprocating pad dyeing machine, belonging to the technical field of fiber dyeing. Background Art

[0002] Colored spun yarn products are made by first dyeing loose fibers and then spinning mixed colors. Multiple fibers are mixed and spun to achieve a unique mixed color and colorful single yarn style. They can achieve a soft three-dimensional effect and texture that is difficult to achieve with natural yarn products. Its rich colors and innovative spinning technology can provide a larger design space for downstream industries and bring more personalized and fashionable clothing products. In recent years, the overall scale of my country's colored spun yarn market has grown, the market share of mid-to-high-end textiles has gradually expanded, and the consumption potential of downstream customers has been continuously explored, which also makes the market penetration rate of colored spun yarn expected to continue to rise.

[0003] The key to the production of colored spun yarn lies in the dyeing of loose fibers. Compared with the overall dyeing method of traditional white yarn or white cloth, colored spun yarn is first dyed on part of the fibers and then blended with the original color fibers. It has obvious advantages in energy conservation, emission reduction and environmental protection. At present, domestic loose fiber dyeing processing usually adopts intermittent immersion dyeing such as dye vat dyeing. After dyeing, washing, dehydration, opening, drying, packaging and other processes are completed in different equipment. Not only is the processing flow long, the dyeing cycle is long, the immersion liquid and the cold pile are intermittently separated, and continuous operation cannot be achieved throughout the process. The operation is cumbersome, and the immersion tank is small, resulting in a short contact time between the dye solution and the fiber. A longer cold pile time is required to ensure the dyeing rate and dyeing uniformity. Summary of the invention

[0004] In view of this, the present application provides a flat-width reciprocating pad dyeing machine, which not only realizes uniform dyeing of bulk fibers, but also realizes energy-saving and emission-reducing short-process dyeing of bulk fibers.

[0005] Specifically, the present application is implemented through the following scheme:

[0006] A flat width reciprocating padding dyeing machine comprises an immersion tank and a re-padder, wherein the re-padder is located above the immersion tank, the two are connected and integrally arranged, the immersion tank is equipped with an upper net belt and a lower net belt, the loose fibers are clamped by the upper net belt and the lower net belt and sent into the immersion tank and are immersed in the liquid by reciprocating movement, and then enter the re-padder, the excess immersion in the loose fibers is squeezed out and all flows back to the immersion tank for reuse, and the loose fibers that have been squeezed out are sent out for immersion padding dyeing.

[0007] Further, as a preference:

[0008] A plurality of groups of rollers are arranged in the immersion tank, and the rollers are located at different heights of the immersion tank. The upper mesh belt and the lower mesh belt are mounted on the rollers to form a serpentine path in the immersion tank. The upper mesh belt and the lower mesh belt rotate with the rollers to realize translational reciprocation in the immersion tank, and the loose fibers clamped between the two are immersed in the liquid.

[0009] The communicating part between the re-rolling car and the immersion tank is located below the squeezing roller of the re-rolling car.

[0010] The immersion tank is provided with a dyeing liquid spraying pipe, and the loose fibers are immersed in the immersion tank and sprayed with the dyeing liquid at the same time.

[0011] An introduction roller is arranged at the entrance of the immersion tank, and the loose fibers are brought in by the lower mesh belt and merged with the upper mesh belt at the introduction roller to form a clamping and conveying of the loose fibers.

[0012] One or more heaters are arranged in the immersion tank.

[0013] It also includes a shower machine, in which a plurality of washing units are arranged. The blanket-like loose fibers after padding and dyeing are clamped and moved forward to the first washing unit of the spraying process by a group of guide belts. The washing water is sprayed on the blanket-like fiber net from top to bottom. The loose fibers are first rinsed with the washing water, and then squeezed with water, and then enter the next washing unit to repeat the rinsing and squeezing. More preferably, each washing unit is equipped with a fiber recovery device, and the collected fibers are sent to the blanket-like fibers through a micro conveyor curtain and re-enter the shower process.

[0014] In the above scheme:

[0015] A pair of powered rollers and a plurality of unpowered rollers are respectively arranged in the circuits of the lower mesh belt and the upper mesh belt to support the upper mesh belt and the lower mesh belt to clamp the fiber web and move forward.

[0016] The loops of the lower mesh belt and the upper mesh belt are provided with a mesh belt tension regulator and a deviation correction mechanism to ensure proper tension and always center the mesh belt.

[0017] Compared with the prior art, the beneficial effects of this application are summarized as follows:

[0018] The flat-width reciprocating pad dyeing machine provided by the present application is equipped with a double mesh belt structure and multiple groups of rollers with different heights. The mesh belt is mounted on the roller to form a serpentine reciprocating path in the immersion tank. The power source (such as a motor) of the roller is started, and the roller rotates, driving the mesh belt to move accordingly, ensuring that the loose fibers can be kept in the immersion tank for a relatively long time, and can also maintain the loose fibers to continuously move back and forth in a backward link under the clamping of the mesh belt, completing the flat-width reciprocating pad dyeing process of the loose fibers, ensuring dyeing uniformity, and greatly saving the length and floor space of the assembly line. The re-rolling car is connected to the immersion tank and is arranged in an integrated manner, so that 100% of the dye treatment liquid rolled out can be returned to the immersion tank for reuse.

[0019] Compared with the conventional dyeing method in dyeing vats, the present application realizes continuous dyeing of the entire process from raw materials to finished products, eliminating the steps of pad dyeing, winding, cold stacking, unwinding, etc., uses less dye, and the dyeing is more uniform. In addition, no auxiliary dyeing agent needs to be added during the dyeing process, and no additional heat source needs to be provided for heating. The processing procedure is simplified, the intensity of washing and drying in post-processing is reduced, and the water consumption, energy consumption, steam and production costs are greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the structure of this application;

[0022] Figure 2 It is a structural schematic diagram of the spray machine in this application;

[0023] Figure 3 This is a comparison chart of the color difference ΔE of different viscose fiber samples;

[0024] Figure 4 The following are the physical pictures of different viscose fiber samples;

[0025] Figure 5 This is a comparison chart of the fiber surface morphology after drying different viscose fibers;

[0026] Figure 6 This is a comparison chart of energy consumption between the dyeing method of the present application and the conventional dyeing method.

[0027] Numbers in the figure: 1. Lower mesh belt; 2. Upper mesh belt; 3. Immersion tank; 31. Heater; 32. Roller; 321. Roller one; 322. Roller two; 323. Roller three; 324. Roller four; 325. Roller five; 326. Roller six; 327. Roller seven; 328. Roller eight; 329. Roller nine; 4. Re-roller; 41. Squeeze roller; 5. Introducing roller; 6. Dye solution spray pipe; 61. Guide roller; 7. Lower guide belt; 8. Upper guide belt; 9. Water squeezing roller. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the technical solutions in the embodiments of this application will be further described in detail below in conjunction with the drawings in the embodiments of this application. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit the technical solutions of this application. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0029] Example 1

[0030] The present application provides a flat width reciprocating pad dyeing machine, combined with Figure 1 , including a lower mesh belt 1, an upper mesh belt 2, an immersion tank 3 and a re-rolling car 4. A pair of powered rollers (not marked in the figure) and a plurality of unpowered rollers (not marked in the figure) are respectively arranged in the circuits of the lower mesh belt 1 and the upper mesh belt 2 to support the upper mesh belt 2 and the lower mesh belt 1 to clamp the fiber web and move forward. The re-rolling car 4 is located above the immersion tank 3, and the two are connected and arranged as one. An introduction roller 5 is arranged near the entrance of the immersion tank 3, and a plurality of groups of rollers 32 are arranged in the immersion tank, and the plurality of groups of rollers 32 are respectively arranged at different heights. A group of squeezing rollers 41 distributed up and down are arranged in the re-rolling car 4.

[0031] The loose fibers are brought into the immersion tank 1 by the lower mesh belt 1 and merge with the upper mesh belt 2 near the introduction roller 5, so that the loose fibers are clamped and conveyed between the upper mesh belt 2 and the lower mesh belt 1; then the lower mesh belt 1, the upper mesh belt 2 and the loose fibers between the two are put on the roller 32 together, and their paths form a serpentine path. When the roller 32 rotates, the upper mesh belt 2 and the lower mesh belt 1 drive the loose fibers to move back and forth in the immersion tank 3 in a horizontal manner, and complete the immersion in the process of displacement.

[0032] The loose fibers that have completed the immersion enter the re-rolling car 4 along with the lower mesh belt 1 and the upper mesh belt 2. When passing through the squeezing roller 41, the upper and lower squeezing rollers 41 squeeze the loose fibers, and the excess immersion in the loose fibers is squeezed out and all flows back to the immersion tank 3 through the connecting parts for reuse. The lower mesh belt 1 after exiting the squeezing roller 41 is separated from the upper mesh belt 2, and the loose fibers that have completed the squeezing are taken out of the flat-width reciprocating roller dyeing machine along with the lower mesh belt 1.

[0033] The setting of the roller 32 can be Figure 1Take an example to illustrate: nine groups of rollers 32 are arranged: roller one 321, roller two 322, roller three 323, roller four 324, roller five 325, roller six 326, roller seven 327, roller eight 328 each include a number of rollers, roller one 321, roller two 322, roller three 323, roller four 324, roller five 325, roller six 326, roller seven 327, roller eight 328 are arranged at different heights from top to bottom, and the same group of rollers are at the same height (such as: the three rollers included in roller one 321 are basically at the same height); roller nine 329 is arranged under the heavy rolling car 4. The lower mesh belt 1, the upper mesh belt 2 and the loose fibers therebetween are first wound around the rollers of roller one 321 from left to right in sequence to the right end of roller one 321; they go down and wind around the rollers of roller two 322 from right to left to the left end of roller two 322; they go down and wind around the rollers of roller three 323 from left to right in sequence to the right end of roller three 323; they go down, ... and repeat this cycle until the right end of roller eight 328, and continue to move rightward to the bottom of roller nine 329, and after winding around the rollers of roller nine 329 from bottom to top, they exit the immersion tank 3, enter between a pair of squeezing rollers 41 of the heavy rolling car 4, and exit the squeezing roller 41 after squeezing is completed.

[0034] The power source (such as a motor) of the roller 32 is started, and the roller 32 rotates, driving the upper belt 2 and the lower belt 1 to move accordingly, ensuring that the loose fibers can stay in the immersion tank 3 for a relatively long time, greatly saving the length and floor space of the assembly line; and maintaining the loose fibers to continuously move back and forth in a backward link under the clamping of the upper belt 2 and the lower belt 1, ensuring the uniformity of dyeing. The heavy rolling car 4 is connected to the immersion tank 3 and is integrally arranged to ensure that 100% of the dye treatment liquid rolled out can flow back to the immersion rolling tank 3, realizing the reuse of the dye liquid.

[0035] In the above scheme, a dye spray pipe 6 can also be arranged near the entrance of the immersion tank 3. The dye spray pipe 6 is preferably arranged between the introduction roller 5 and the roller 321. The loose fibers entering the immersion tank 3 are first pre-soaked with the dye sprayed by the dye spray pipe 6, and then immersed in the dye by each group of rollers 32 moving back and forth.

[0036] A group of guide rollers 61 can be respectively arranged on one side or both sides (preferably both sides) of the dye spray pipe 6, and the guide rollers 61 guide the lower mesh belt 1, the upper mesh belt 2 and the loose fibers therebetween into the bottom of the dye spray pipe 6. In particular, when two groups of guide rollers 61 are arranged, the two groups of guide rollers 61 are separated at the same horizontal position below the dye spray pipe 6, which can ensure that the lower mesh belt 1, the upper mesh belt 2 and the loose fibers therebetween move in a horizontal direction when passing through the dye spray pipe 6, thereby ensuring uniform dye spraying and maximum coverage.

[0037] One or more sets of heaters 31 may be arranged in the immersion tank 3, such as at the bottom of the immersion tank 3, and cooperate with central control facilities to control the temperature of the dye solution for pad dyeing.

[0038] The above-mentioned flat-width reciprocating pad dyeing machine can also be used in conjunction with a shower washing machine. After the loose fibers have been squeezed out of the flat-width reciprocating pad dyeing machine by the lower mesh belt 1, they can be directly sent to the lower guide belt 7 of the spraying machine.

[0039] Spray machine Figure 2 As shown: it mainly includes a lower guide belt 7, an upper guide belt 8 and a plurality of water squeeze rollers 9. The head of the lower guide belt 7 is close to the tail of the lower mesh belt 1, and the lower mesh belt 1 is at a high position relative to the lower guide belt 7. At the same time, the speed of the lower guide belt 7 is faster than that of the lower mesh belt 1, so that the loose fibers can fall smoothly and naturally on the lower guide belt 7. The upper guide belt 8 is arranged in coordination with the lower guide belt 7. A pair of powered rollers (not marked in the figure) and a plurality of unpowered rollers (not marked in the figure) can also be respectively arranged in the loop to support the lower guide belt 7 and the upper guide belt 8 to clamp the fiber web and move forward. The water squeeze roller 9 and a spray mechanism such as a spray head and other components (conventional structure, not shown in the figure) are also arranged in coordination with the lower guide belt 7 and the upper guide belt 8. The cleaning water is sprayed by the spray head on the loose fibers passing under the spray head. After the loose fibers are rinsed, they are squeezed out by the squeezing action of the water squeeze roller 9.

[0040] In this scheme, the rinsing process includes multiple washing units. The blanket-like loose fibers after dip-dyeing are clamped by the high-throughput lower guide belt 7 and the upper guide belt 8 and move forward to the first washing unit. After rinsing and squeezing, they enter the next washing unit to repeat rinsing and squeezing.

[0041] During the application process, each washing unit can be equipped with a fiber recovery device, and the collected fibers are sent to the blanket-like fibers through a micro-conveyor curtain and re-enter the washing process.

[0042] The above-mentioned padding dyeing process and spraying process are both double mesh belt clamping and conveying, realizing the continuous mesh belt conveying of the whole process from dyeing to rinsing of the loose fibers. Each set of double mesh belt clamping and conveying units is provided with two pairs of powered rollers and several unpowered rollers according to different lengths to support the upper and lower mesh belts to clamp the fiber net and move forward; at the same time, a mesh belt tension regulator and a deviation correction mechanism are configured to ensure that the tension is appropriate and the mesh belt always moves in the center. Among them, the above-mentioned double mesh belt clamping and conveying unit can use felt as the mesh belt material for conveying in the heavy rolling link, such as the mesh belt corresponding to the flat-width reciprocating padding dyeing machine and the guide belt corresponding to the rinsing machine. Because the felt has high strength and good elasticity, it has certain flexibility and permeability, which can not only ensure that the loose fibers pass through the padding car smoothly, but also withstand a pressure of about 100 tons, and ensure that the moisture content of the fibers after rolling is controlled below 130%, meeting the process requirements; high-strength engineering fibers such as high-strength polyester industrial yarn woven mesh belts can also be used to ensure that the fibers fully absorb and discharge the working fluid, and the mesh belt life exceeds 6000h.

[0043] When viscose is used as loose fiber for dyeing, some viscose fiber samples are taken out at different positions of the dyeing process to test various structures and properties. The samples are shown in Table 1.

[0044] Table 1: Naming table of different viscose fiber samples

[0045]

[0046]

[0047] Figure 3 This is a comparison chart of the color difference ΔE of different viscose fiber samples. It can be seen that there are large differences in the color difference of different viscose fiber samples. The color difference ΔE of sample 1# is as high as 2.16, indicating that after only a single online dipping and padding, the dye has not been evenly penetrated in the fiber web, and the dye adsorption at different positions is quite different, resulting in large color difference.

[0048] Figure 4 The following are pictures of different viscose fiber samples. The observation results show that after the viscose fiber adsorbed the dye solution and fixed the color, the dye solution slowly flowed in the fiber (it can cooperate with gravity and rotating centrifugal force, such as rotating fixation) and was evenly distributed, so that the uniformity of fiber adsorption of dye solution at different positions was improved, and the color difference ΔE decreased, but there was also a large difference between the ΔE value without fixation. After repeated and extensive tests, the 24h fixation time can basically meet the requirements of level dyeing. After further elution and drying, the unreacted dye and hydrolyzed dye on the fiber surface were washed off, and the color difference of the above 3# and 4# samples was further reduced. The ΔE of the samples after 24h of fixation dropped to below 0.5, which has a certain degree of dyeing uniformity.

[0049] Table 2: Mechanical properties of different viscose fiber samples

[0050]

[0051] Table 2 shows the changes in mechanical properties such as breaking strength and breaking elongation of different viscose fiber samples. It can be seen from Table 2 that after a series of immersion dyeing and leaching, the breaking strength and breaking elongation of viscose fibers decreased slightly under the action of dyes and mechanical forces, among which the breaking strength decreased from (2.70±0.35) cN / dtex to (2.26±0.38) cN / dtex, a decrease of about 16%. The breaking elongation decreased from (16.45±2.20)% to (13.65±2.57)%, a decrease of about 17%. Although the breaking strength has decreased, it still meets the standards for cotton-type viscose staple fiber superior products in the FZ / T 52061-2021 "Dyed Viscose Staple Fiber" standard formulated by our unit.

[0052] Table 3: Physical indicators of dyed viscose fibers after elution (4#-48)

[0053]

[0054] As can be seen from Table 3, the color fastness of dyed viscose fiber, such as alkali resistance, acid sweat color fastness, water fastness, wet and dry color fastness, rubbing color fastness, soaping color fastness and light color fastness, all reach level 4 or above, meeting the requirements of corresponding national standards.

[0055] Figure 5 This is a comparison chart of the surface morphology of different viscose fibers after drying. Figure 5 It can be seen that the surface of the untreated viscose fiber (a) is smooth and free of foreign matter, showing the typical groove structure of viscose fiber. After pad dyeing, a small amount of particles are attached to the fiber surface, such as (b), (c), and (d). The particles may be formed by the recrystallization of the dye after the dye solution is dried. After elution and drying, the particles on the fiber surface are removed and the fiber is basically restored to a smooth state, such as (e) and (f).

[0056] In terms of cost, combined Figure 6 It can be seen that compared with the conventional dyeing method, the dyeing method of the present application completes the whole process from raw materials to finished products, eliminating the steps of rolling dyeing, rolling, cold stacking, unwinding, etc. in the disclosed technology, and on the basis of achieving salt-free treatment (the amount of sodium sulfate is 0); compared with the traditional pad dyeing machine, the reciprocating dyeing shortens the length, saves space, and further shortens the process. The amount of dye used is small (from the conventional 50kg / ton of loose fiber to 25kg / ton of loose fiber), the dyeing is more uniform, and no auxiliary dyeing agent is required during the dyeing process, and no additional heat source is required for heating. The processing procedures are simplified, the intensity of leaching and drying in post-processing is reduced, and the water consumption, energy consumption and production costs are greatly reduced. The water consumption per ton of loose fiber is about 6 tons, which is more than 80% lower than that of conventional dyeing methods; the steam consumption is reduced by about 40% compared with conventional methods, which greatly saves energy and water consumption and significantly improves efficiency.

[0057] The above-mentioned embodiments only express several feasible implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention, and the embodiments are not used to limit the scope of protection in the claims of the present invention. For ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and all equivalent implementations or changes that do not depart from the present invention should be included in the technology of the present invention.

Claims

1. A flat width reciprocating pad dyeing machine, characterized in that: The invention comprises an immersion tank and a re-rolling car, wherein the re-rolling car is located above the immersion tank, the two are connected and integrally arranged, the immersion tank is equipped with an upper net belt and a lower net belt, the loose fibers are clamped by the upper net belt and the lower net belt and sent into the immersion tank and are moved back and forth to be immersed in the liquid, and then enter the re-rolling car, the excess immersion in the loose fibers is squeezed out and all flows back to the immersion tank for reuse, and the loose fibers after squeezing are sent out for immersion and padding dyeing.

2. The flat width reciprocating pad dyeing machine according to claim 1, characterized in that: A plurality of groups of rollers are arranged in the immersion tank, and the rollers are located at different heights of the immersion tank. The upper mesh belt and the lower mesh belt are mounted on the rollers to form a serpentine path in the immersion tank. The upper mesh belt and the lower mesh belt rotate with the rollers to realize translational reciprocation in the immersion tank, and the loose fibers clamped between the two are immersed in the liquid.

3. The flat width reciprocating pad dyeing machine according to claim 1, characterized in that: The communicating part between the re-rolling car and the immersion tank is located below the squeezing roller of the re-rolling car.

4. The flat width reciprocating pad dyeing machine according to claim 1, characterized in that: The immersion tank is provided with a dyeing liquid spraying pipe, and the loose fibers are immersed in the immersion tank and sprayed with the dyeing liquid at the same time.

5. The flat width reciprocating pad dyeing machine according to claim 1, characterized in that: An introduction roller is arranged at the entrance of the immersion tank, and the loose fibers are brought in by the lower mesh belt and merged with the upper mesh belt at the introduction roller to form a clamping and conveying of the loose fibers.

6. The flat width reciprocating pad dyeing machine according to claim 1, characterized in that: One or more heaters are arranged in the immersion tank.

7. The flat width reciprocating pad dyeing machine according to claim 1, characterized in that: It also includes a shower washing machine, in which a plurality of washing units are arranged. The blanket-like loose fibers after padding and dyeing are clamped and moved forward to the first washing unit of the spraying process by a group of guide belts. The washing water is sprayed on the blanket-like fiber web from top to bottom. The loose fibers are first rinsed with the washing water and then squeezed. Then, they enter the next washing unit to repeat the rinsing and squeezing.

8. The flat width reciprocating pad dyeing machine according to claim 7, characterized in that: Each washing unit is equipped with a fiber recovery device. The collected fibers are sent onto the blanket-like fibers through a micro-conveyor curtain and re-enter the washing process.

9. The flat width reciprocating pad dyeing machine according to any one of claims 1 to 8, characterized in that: A pair of powered rollers and a plurality of unpowered rollers are respectively arranged in the circuits of the lower mesh belt and the upper mesh belt to support the upper mesh belt and the lower mesh belt to clamp the fiber web and move forward.

10. The flat width reciprocating pad dyeing machine according to any one of claims 1 to 8, characterized in that: The loops of the lower mesh belt and the upper mesh belt are provided with a mesh belt tension regulator and a deviation correction mechanism to ensure proper tension and always center the mesh belt.

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