A combined dyeing and padding machine with infrared drying device

Abstract

The utility model relates to dyeing equipment technical field, especially in a kind of slushing combined machine with infrared drying device, it include: warp beam stand, wetting tank, dyeing tank, washing tank, cover dyeing device, infrared drying device, color fixing tank, steamer and first yarn storage frame connected in order along slushing direction.The cover dyeing device includes at least one group first dyeing vat and first air frame connected in order along slushing direction.The infrared drying device includes multiple first drying cylinder and multiple infrared heating plate set in the horizontal two sides of first drying cylinder, which are spaced apart along slushing direction.When warp yarn is pre-dried on first drying cylinder, infrared heating plate emits infrared light to warp yarn after being powered on, so that the moisture in the inner and outer layers of warp yarn is heated synchronously and evaporates rapidly, thereby avoiding the imbalance of humidity in warp yarn caused by the evaporation of external moisture when only relying on first drying cylinder to dry, inhibiting the migration phenomenon of active dye migrating to the surface of warp yarn during high-temperature drying process, and ensuring the uniformity of warp yarn cover dyeing color.

Description

Technical Field

[0001] This utility model relates to the field of dyeing equipment technology, and in particular to a combined dyeing and sizing machine with an infrared drying device. Background Technology

[0002] Denim is a timeless traditional clothing fabric, typically made by dyeing warp yarns with indigo or sulfur dyes to produce blue or black yarns, which are then interwoven with white weft yarns. It boasts advantages such as durability and comfort, and is widely used in casual wear, bags, shoes, hats, and home décor. With the upgrading of consumption, two-tone and colored denim fabrics with richer colors are gradually gaining market favor. Two-tone denim usually uses an indigo or sulfur dyeing base before being over-dyed with reactive dyes; colored denim, on the other hand, does not undergo a base dyeing process and is directly dyed with reactive dyes.

[0003] However, existing sizing and dyeing machines are specialized dyeing equipment designed for repeated immersion and oxidation of indigo dye, and cannot provide the physical conditions required for the fixation of reactive dyes. Some existing technologies modify existing sizing and dyeing machines by adding drying cylinders between multiple dyeing tanks for color fixation. However, during the drying process, reactive dyes migrate to the surface of the warp fibers, causing dyeing defects such as color difference and uneven coloring, affecting the quality of the finished denim fabric. Therefore, there is an urgent need to improve existing sizing and dyeing machines. Utility Model Content

[0004] In order to address the technical deficiencies mentioned in the background art, the purpose of this utility model is to provide a pulping and dyeing combined machine with an infrared drying device to solve the above problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a sizing and dyeing combined machine with an infrared drying device, comprising: a warp beam frame, a wetting tank, a dyeing tank, a washing tank, a dyeing device, an infrared drying device, a color fixing tank, a steaming box, and a first yarn storage rack connected sequentially along the sizing and dyeing direction; Wherein: the dyeing device includes at least one set of first dyeing vats and first air-exposed frames connected sequentially along the dyeing direction; The infrared drying device includes multiple first drying cylinders spaced apart along the dyeing direction and multiple infrared heating plates disposed on both horizontal sides of the first drying cylinders.

[0006] Furthermore, the infrared drying device also includes a drying chamber, in which multiple first drying cylinders and multiple infrared heating plates are disposed inside the drying chamber, and the inner wall of the drying chamber is provided with a heat insulation layer.

[0007] Furthermore, the infrared drying device also includes a dehumidifying hood disposed above the drying chamber, and the dehumidifying hood is connected to an exhaust fan.

[0008] Furthermore, a reflector is provided on the side of the infrared heating plate facing away from the first drying cylinder. The reflector has an arc-shaped plate structure and is used to concentrate infrared heat and reflect it onto the warp yarn.

[0009] Furthermore, the open end of the reflector faces the infrared heating plate, and the infrared heating plate is located at the focal point of the reflector.

[0010] Furthermore, the inner wall surface of the reflector is coated with a high-temperature resistant, non-stick coating.

[0011] Beneficial effects: 1. The infrared drying device of this application includes multiple first drying cylinders spaced apart along the dyeing direction and multiple infrared heating plates disposed on both horizontal sides of the first drying cylinders. After the warp yarn is dyed in an over-dyeing device and washed in a washing tank, it enters the infrared drying device for pre-drying. When the warp yarn is dried on the first drying cylinder, the infrared heating plates emit infrared light to the warp yarn after being energized. Infrared light has penetrating properties, which enables the moisture in the inner and outer layers of the warp yarn to be heated simultaneously and evaporated rapidly, thereby avoiding the uneven humidity between the inner and outer layers of the warp yarn caused by the external moisture evaporating first when drying only in the first drying cylinder. This synchronous drying method suppresses the migration phenomenon of reactive dyes to the surface of the warp yarn during high-temperature drying, thereby ensuring uniform over-dyeing color of the warp yarn.

[0012] 2. In this application, the warp yarns are impregnated with fixing dyes and then enter a steaming chamber. Steam is blown onto the warp yarns, causing the reactive dyes to form covalent bonds with the fibers under humid and hot conditions, resulting in better color fixing. Since the reactive dyes are covalently bonded to the fibers, there is no need to consume sodium hydrosulfite, making the production process more environmentally friendly.

[0013] 3. The over-dyeing apparatus of this application is not limited to reactive over-dyeing processes, but can also be used for pigment over-dyeing and vat dye over-dyeing, etc. Depending on the over-dyeing process, the over-dyeing apparatus can be equipped with an unspecified number of first dyeing vats and first air-venting frames. Each first dyeing vat carries a different type of dye, so that the equipment is not limited to a single dyeing process of indigo or sulfur dyes, but can be compatible with multiple over-dyeing processes, thus broadening the types of fibers that can be processed. Attached Figure Description

[0014] Figure 1 This is a side view of the front section of a sizing and dyeing combined machine with an infrared drying device according to an embodiment of this application. The arrows indicate the sizing and dyeing direction. Figure 2 This is a side view of the middle section of a sizing and dyeing combined machine with an infrared drying device according to an embodiment of this application. The arrows indicate the sizing and dyeing direction. Figure 3 This is a side view of the rear section of a sizing and dyeing combined machine with an infrared drying device according to an embodiment of this application. The arrows indicate the sizing and dyeing direction. Figure 4 This is a side view of the infrared drying apparatus according to an embodiment of this application; Figure 5 This is a side view of the reflector and infrared heating plate according to an embodiment of this application.

[0015] Reference numerals: 1. Warp beam frame; 2. Wetting tank; 21. Yarn feeding roller; 22. Scouring tank; 23. Second yarn storage rack; 3. Dyeing tank; 31. Second dyeing tank; 32. Second air vent rack; 4. Washing tank; 5. Over-dyeing device; 51. First dyeing tank; 52. First air vent rack; 6. Infrared drying device; 61. First drying cylinder; 62. Infrared heating plate; 63. Drying chamber; 64. Dehumidifying hood; 65. Exhausting fan; 66. Reflector; 661. Focal point; 662. High-temperature resistant non-stick coating; 7. Color fixing tank; 8. Steaming box; 9. First yarn storage rack; 10. Second drying cylinder; 11. Sizing tank; 12. Third drying cylinder; 13. Warp yarn. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0017] Please refer to the attached document. Figures 1-5 This embodiment discloses a sizing and dyeing combined machine with an infrared drying device. The machine includes a warp beam frame 1, a wetting tank 2, a dyeing tank 3, a washing tank 4, an over-dyeing device 5, an infrared drying device 6, a color-fixing tank 7, a steaming box 8, a first yarn storage rack 9, a sizing tank 11, and a third drying cylinder 12, connected sequentially along the sizing direction. The warp yarn 13 is made of lyocell fiber. It is drawn from the warp beam frame 1, wetted in the wetting tank 2, and then enters the dyeing tank 3 for indigo dyeing. After washing in the washing tank 4, it enters the over-dyeing device 5 for reactive dye over-dyeing. After pre-drying in the infrared drying device 6, it is immersed in the color-fixing bath in the color-fixing tank 7, steamed in the steaming box 8 to complete color fixation, wound by the first yarn storage rack 9, sizing in the sizing tank 11, dried in the third drying cylinder 12, and then conveyed to the downstream weaving machine.

[0018] See Figure 1 Specifically, the warp beam holder 1 is used to hold the warp beams. In a preferred embodiment, the warp beam holder 1 uses a grouped double-frame unwinding method to unwind the warp yarns 13. This unwinding method can minimize the difference in unwinding tension between the warp beams, thereby avoiding the problems of warp yarn breakage and increased support beam collapse caused by uneven tension.

[0019] See Figure 1The wetting tank 2 includes a yarn feeding carriage 21, a scouring tank 22, and a second yarn storage rack 23 arranged sequentially along the dyeing direction. After the warp yarn 13 is drawn from the warp beam frame 1, it first enters the yarn feeding carriage 21. The yarn feeding carriage 21 includes a driving roller and a driven roller. The warp yarn 13 passes between the driving roller and the driven roller, and the yarn feeding carriage 21 squeezes out the air inside the warp yarn 13, allowing the fibers of the warp yarn 13 to expand. After being squeezed by the yarn feeding carriage 21, the warp yarn 13 enters the scouring tank 22. The scouring tank 22 contains a high-temperature alkaline scouring solution. The warp yarn 13 is scourted in the scouring tank 22 under high-temperature and strongly alkaline conditions to remove impurities such as wax, pectin, and nitrogenous substances from the fibers, thereby improving the permeability and absorbency of the warp yarn 13 fibers. After scouring in the scouring tank 22, the warp yarn 13 is washed with water to remove residual alkali and impurities, and then enters the second yarn storage rack 23. The second yarn storage rack 23 is used for temporary storage of the scouring and boiling warp yarn 13. After the warp yarn 13 is output from the second yarn storage rack 23, it enters the dyeing tank 3.

[0020] See Figure 1 The dyeing tank 3 is used to dye the warp yarn 13 with indigo or sulfur dye to prepare warp yarn 13 with a blue or black base color. Indigo dyeing employs a process of multiple immersions and oxidation at room temperature and pressure. Preferably, the dyeing tank 3 includes twelve sets of second dyeing vats 31 and a second air-ventilation frame 32 connected sequentially along the dyeing direction. After the warp yarn 13 is immersed in indigo dye in the second dyeing vat 31, it enters the second air-ventilation frame 32 to oxidize and develop color in the air. Through multiple immersions and oxidations, the warp yarn 13 obtains a rich indigo base color. In some embodiments, a dye liquor circulation system is provided between the various second dyeing vats 31, and a circulation pump replenishes the dye liquor to multiple second dyeing vats 31 to ensure consistent dyeing.

[0021] See Figure 2 After indigo dyeing, warp yarn 13 enters washing tank 4. Washing tank 4 is used to wash the indigo-dyed warp yarn 13 to remove floating dye, impurities, and salt from the surface of the warp yarn 13, thereby improving the color fastness and brightness of the warp yarn 13. Multiple washing tanks 4 can be set up sequentially along the dyeing direction to ensure thorough cleaning.

[0022] See Figure 3The over-dyeing apparatus 5 includes at least one set of first dyeing vats 51 and first air vents 52 connected sequentially along the dyeing direction. Specifically, taking reactive over-dyeing of lyocell fiber for warp yarn 13 as an example, two sets of first dyeing vats 51 and first air vents 52 are provided. The first dyeing vat 51 of the first set contains a modifier, specifically the cationic modifier TF-392C. After preliminary dyeing, the warp yarn 13 enters the first dyeing vat 51 of the first set to be immersed in the modifier, and then enters the first air vent 52 for oxidation. The cationic modifier TF-392C is a reactive polymer compound that does not contain free or bound formaldehyde. It reacts with cellulose fibers at room temperature, allowing for subsequent dyeing without baking. Immersion in the modifier modifies the fiber, increasing the affinity between the fiber and the reactive dye, and improving the dye uptake percentage.

[0023] The first dyeing vat 51 of the second group contains reactive dyes and a locking agent. The reactive dyes can be vinyl sulfone-based or triazine-based. The locking agent must be a solvent that is compatible with the reactive dyes. After being modified in the first dyeing vat 51 of the first group, the warp yarn 13 passes through the first air vent 52 of the first group and enters the first dyeing vat 51 of the second group for dyeing with reactive dyes and locking.

[0024] It should be noted that this over-dyeing device 5 is not limited to reactive over-dyeing processes, but can also be used for pigment over-dyeing and vat dye over-dyeing. Depending on the over-dyeing process, the over-dyeing device 5 can be equipped with an unspecified number of first dyeing vats 51 and first air vents 52. Each first dyeing vat 51 carries a different type of dye. This allows the equipment to be compatible with multiple over-dyeing processes, rather than being limited to a single dyeing process using indigo or sulfur dyes, thus broadening the types of fibers that can be processed.

[0025] See Figure 3 and Figure 4 The infrared drying device 6 includes multiple first drying cylinders 61 spaced apart along the dyeing direction and multiple infrared heating plates 62 arranged on both horizontal sides of the first drying cylinders 61. The warp yarn 13, after being dyed by the over-dyeing device 5 and washed in the washing tank 4, enters the infrared drying device 6 for pre-drying. Specifically, 16 first drying cylinders 61 are arranged in a 4x4 array. Multiple rows of infrared heating plates 62 are arranged between each row of first drying cylinders 61, and multiple infrared heating plates 62 in each row are arranged vertically at intervals on infrared heating plate supports.

[0026] When the warp yarn 13 is dried on the first drying cylinder 61, the infrared heating plate 62 is energized and emits infrared light to the warp yarn 13. Infrared light has penetrating power, which enables the moisture in the inner and outer layers of the warp yarn 13 to be heated simultaneously and evaporated rapidly. This avoids the uneven humidity between the inner and outer layers of the warp yarn 13 caused by the external moisture evaporating first when drying solely on the first drying cylinder 61. This simultaneous drying method suppresses the migration phenomenon of reactive dyes to the surface of the warp yarn 13 during the high-temperature drying process, thereby ensuring uniform dyeing of the warp yarn 13.

[0027] See Figure 3 In the reactive over-dyeing process of lyocell fibers, the fixing bath 7 contains sodium bicarbonate dye. This scheme adopts a two-bath, two-step method, dyeing first and then fixing, with the fixing bath and dyeing bath separated to prevent the reactive dye from undergoing extensive hydrolysis due to the alkaline sodium bicarbonate dye. Specifically, the fixing bath 7 can be equipped with one or two stages. After the warp yarn 13 is immersed in the fixing dye, it enters the steaming box 8. The steaming box 8 blows steam onto the warp yarn 13, causing the reactive dye to form covalent bonds with the fiber under humid and hot conditions, resulting in better fixing effect. The reactive dye and fiber are bonded by covalent bonds, eliminating the need for sodium hydrosulfite, making the production more environmentally friendly.

[0028] In some embodiments, a second drying cylinder 10 may be installed above the color-fixing tank 7. After the warp yarn 13 is fixed in the color-fixing tank 7, it is dried by the second drying cylinder 10. Specifically, there are eight second drying cylinders 10, which are arranged at intervals along the dyeing direction.

[0029] See Figure 3 and Figure 4 Furthermore, the infrared drying device 6 also includes a drying chamber 63, inside which multiple first drying cylinders 61 and multiple infrared heating plates 62 are disposed. The inner wall of the drying chamber 63 is provided with a thermal insulation layer. In some embodiments, the thermal insulation layer is made of aluminum silicate fiber felt or glass wool felt. These materials have low thermal conductivity, high temperature resistance, and good chemical stability, which can reduce heat loss inside the drying chamber 63.

[0030] See Figure 4 The infrared drying device 6 also includes a dehumidifying hood 64 located above the drying chamber 63, and the dehumidifying hood 64 is connected to an exhaust fan 65. The exhaust fan 65 extracts the high-temperature water vapor generated during the drying process of the warp yarn 13 through the dehumidifying hood 64, preventing the water vapor from condensing inside the drying chamber 63 and dripping onto the surface of the warp yarn 13, causing dyeing defects.

[0031] See Figure 4 and Figure 5A reflector 66 is provided on the side of the infrared heating plate 62 facing away from the first drying cylinder 61. The reflector 66 has an arc-shaped plate structure, and its inner wall is a mirror-polished surface. The open end of the reflector 66 faces the infrared heating plate 62, and the infrared heating plate 62 is located at the focal point 661 of the reflector 66. According to the optical characteristics of a parabolic surface, the infrared rays emitted from the focal point 661 are reflected by the arc-shaped inner wall of the reflector 66 to form a parallel beam of light parallel to the central axis of the reflector 66, which is uniformly projected onto the surface of the warp yarn 13. The reflector 66 is used to concentrate and reflect the infrared heat emitted by the side of the infrared heating plate 62 facing away from the warp yarn 13 onto the warp yarn 13, thereby improving thermal efficiency and ensuring uniform heating of the warp yarn 13 in the width direction, avoiding color differences caused by local overheating or insufficient drying.

[0032] See Figure 5 The inner wall surface of the reflector 66 is coated with a high-temperature resistant, non-stick coating 662. In a preferred embodiment, the high-temperature resistant, non-stick coating 662 is a Teflon coating or a ceramic coating, which can prevent slurry or dust from adhering to the inner wall surface of the reflector 66 and maintain the reflectivity of the reflector 66.

[0033] See Figure 3 After the warp yarn 13 is dried by the infrared drying device 6, it is wound up and stored by the first yarn storage rack 9. In principle, the sizing and dyeing combined machine with the infrared drying device described in this application is not allowed to stop during production. However, in actual production, operations such as loading and unloading the sizing process or handling broken ends of the warp yarn 13 inevitably cause downtime. The first yarn storage rack 9 can store the dyed warp yarn 13 when the machine stops, adjust the sizing speed appropriately, and restore the speed to be synchronized with the dyeing speed after the stored warp yarn 13 is used up, thereby ensuring continuous production.

[0034] See Figure 3 The sizing tank 11 is located after the first yarn storage rack 9. After the warp yarn 13 is stored in the first yarn storage rack 9, it enters the sizing tank 11 for sizing treatment. The sizing tank 11 is used to hold sizing agents, commonly including starch and PVA. After the warp yarn 13 is impregnated with the sizing agent, the sizing agent adheres to the surface of the warp yarn 13 and penetrates into the interior of the warp yarn 13 fibers. After subsequent drying, a sizing film is formed, which makes the fine fibers of the warp yarn 13 lie flat, reduces pilling and yarn breakage during weaving, and improves the quality of denim fabric.

[0035] The third drying cylinders 12 are located after the sizing tank 11, and there are sixteen of them, arranged at intervals along the sizing direction. In actual production, after the warp yarns 13 are sized in the sizing tank 11, they enter the third drying cylinders 12 for drying. The warp yarns 13 pass through the sixteen third drying cylinders 12 in sequence. During the multi-stage drying process, the sizing material on the surface of the warp yarns 13 gradually dries and solidifies, forming a sizing film with a certain strength and toughness, thereby improving the weaving performance of the warp yarns 13.

[0036] This embodiment is a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be included within the scope of protection of this application.

[0037] Those skilled in the art should understand that, in the disclosure of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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. Therefore, the above terms should not be construed as limitations on this application.

[0038] In the description of this application, if words such as "several" are used, they mean one or more, with "multiple" meaning two or more. Terms such as "greater than," "less than," and "exceeding" are understood to exclude the stated number, while terms such as "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the number of indicated technical features, or the order of the indicated technical features.

Claims

1. A combined pulping and dyeing machine with an infrared drying device, characterized in that, include: The warp beam frame (1), wetting tank (2), dyeing tank (3), washing tank (4), over-dyeing device (5), infrared drying device (6), color fixing tank (7), steaming box (8) and first yarn storage rack (9) are connected in sequence along the dyeing direction; Wherein: the dyeing device (5) includes at least one set of first dyeing vat (51) and first air-venting frame (52) connected in sequence along the dyeing direction; The infrared drying device (6) includes a plurality of first drying cylinders (61) spaced apart along the dyeing direction and a plurality of infrared heating plates (62) arranged on both sides of the first drying cylinders (61).

2. The sizing and dyeing combined machine with an infrared drying device according to claim 1, characterized in that, The infrared drying device (6) also includes a drying chamber (63), in which multiple first drying cylinders (61) and multiple infrared heating plates (62) are disposed inside the drying chamber (63), and the inner wall of the drying chamber (63) is provided with a heat insulation layer.

3. A sizing and dyeing combined machine with an infrared drying device according to claim 2, characterized in that, The infrared drying device (6) also includes a dehumidifying hood (64) disposed above the drying chamber (63), and the dehumidifying hood (64) is connected to a dehumidifying fan (65).

4. A sizing and dyeing combined machine with an infrared drying device according to claim 1, characterized in that, The infrared heating plate (62) has a reflector (66) on the side facing away from the first drying cylinder (61). The reflector (66) has an arc-shaped plate structure and is used to concentrate infrared heat and reflect it onto the warp yarn (13).

5. A sizing and dyeing combined machine with an infrared drying device according to claim 4, characterized in that, The open end of the reflector (66) faces the infrared heating plate (62), and the infrared heating plate (62) is located at the focal point (661) of the reflector (66).

6. A sizing and dyeing combined machine with an infrared drying device according to claim 5, characterized in that, The inner wall surface of the reflector (66) is coated with a high-temperature resistant, non-stick coating (662).

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