Dyeing and sizing assembly and dyeing and sizing combination machine

Abstract

The invention provides a dyeing and sizing assembly and a dyeing and sizing combination machine, and relates to the technical field of textile equipment. The dye slurry assembly comprises a dye vat and a plurality of dye uptake rollers, the dye uptake rollers are arranged in the dye vat, and at least parts of the dye uptake rollers are sequentially arranged in the length direction of the dye vat; wherein the object to be dyed is alternately and sequentially wound around the dyeing rollers in an S-shaped mode. On the premise that the dyeing quality is guaranteed, the mutual restriction relation between the existing adsorption rate and the vehicle speed can be broken through, and the uniformity of the dye liquor is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textile equipment, in particular to a dyeing assembly and a dyeing combination machine. BACKGROUND

[0002] In the existing yarn dyeing process, especially when using a dyeing combination machine for processing, the following technical bottlenecks generally exist: Firstly, when the yarn is immersed in the dyeing tank for dyeing, the adsorption process of the dye has a saturation limit. When the adsorption rate reaches saturation, even if the immersion time is prolonged, the dyeing rate cannot be effectively improved. In order to ensure that the color depth (dyeing rate) of the final product meets the process requirements, it is usually necessary to maintain a minimum necessary immersion time.

[0003] Secondly, the production speed of the dyeing combination machine is fixed, and due to this saturation adsorption characteristic, the speed cannot be further improved. Because once the speed is improved, the residence time (i.e. immersion time) of the yarn in the dyeing tank will be shortened accordingly, resulting in insufficient dye adsorption and failing to meet the process specified dyeing rate index, which seriously affects the consistency of product quality.

[0004] Furthermore, the existing dyeing tank is usually designed to have a large volume, aiming to ensure sufficient processing space for the yarn. However, the large-capacity dyeing tank leads to another prominent problem: long dye solution circulation period and slow updating speed. This makes it easy for the dye concentration and temperature to have gradient differences in different areas of the dyeing tank, and it is difficult to maintain the uniformity of the dye solution. This non-uniformity is directly transmitted to the yarn, causing different dyeing degrees, and finally appearing as obvious color difference, color mottle and other defects on the fabric surface after weaving, which seriously affects the appearance quality of the fabric and the product grade.

[0005] Therefore, there is a dilemma in the prior art: in order to ensure the dyeing rate, the speed cannot be improved, which affects the efficiency, and the inherent non-uniformity of the large dyeing tank restricts the dyeing quality. An innovative solution is urgently needed. SUMMARY

[0006] Therefore, the purpose of the present application is to overcome the deficiencies in the prior art, and to provide a dyeing assembly and a dyeing combination machine, which can break through the mutual restriction relationship between the existing adsorption rate and the speed, and effectively improve the uniformity of the dye solution under the premise of ensuring the dyeing quality.

[0007] The present application provides the following technical solutions: In a first aspect, the present application provides a dyeing assembly, which comprises: a dyeing tank; a plurality of dyeing rollers, which are arranged in the dyeing tank, and at least part of the plurality of dyeing rollers are arranged in sequence along the length direction of the dyeing tank; wherein the dyed object is alternately wound around each dyeing roller in an S-shaped manner.

[0008] In some embodiments of the first aspect, any two adjacent of the dyeing rollers form a height difference in the height direction of the dyeing tank.

[0009] In some embodiments of the first aspect, at least two adjacent of the dyeing rollers form a press-fit with the dyed object.

[0010] In some embodiments of the first aspect, any two adjacent of the dyeing rollers form a press-fit with the dyed object. All of the dyeing rollers include at least one rigid dyeing roller and at least one elastic dyeing roller.

[0011] In some embodiments of the first aspect, the dyeing assembly further comprises: A first adjusting member is provided for each of the elastic dyeing rollers, and the first adjusting member is capable of adjusting the distance between the corresponding elastic dyeing roller and the adjacent dyeing roller.

[0012] In some embodiments of the first aspect, the first adjusting member includes a first driving part and a first swing part, the first swing part has a first swing axis, the first swing part is rotatable around the first swing axis, the first swing part is rotatably provided with the elastic dyeing roller, the first swing axis and the axis of the elastic dyeing roller are arranged in parallel, the first driving part and the first swing part are connected, and the first driving part is capable of driving the first swing part to rotate around the first swing axis.

[0013] In some embodiments of the first aspect, two elastic dyeing rollers are arranged on both sides of at least one rigid dyeing roller respectively, the first adjusting member includes a first driving part and a first swing part, the first swing part has a first swing axis, the first swing part is rotatable around the first swing axis, the first swing part is rotatably provided with the elastic dyeing roller, the first swing axis and the axis of the elastic dyeing roller are arranged in parallel, the first driving part is telescopically arranged, the fixed end of the first driving part is hingedly connected with one of the elastic dyeing rollers, and the telescopic end is hingedly connected with the other elastic dyeing roller, and the first driving part is capable of driving the two first swing parts to rotate around the first swing axis to move closer to or away from each other.

[0014] In some embodiments of the first aspect, the first swing axis is located at the top end of the first swing part, and the elastic dyeing roller is located at the bottom end of the first swing part.

[0015] In some embodiments of the first aspect, the dyeing assembly further comprises a pair of squeezing rollers, which are arranged at the discharge end of the dyeing tank, and form a squeezing area between the pair of squeezing rollers, and the dyed material is arranged in the squeezing area to form a squeezing cooperation with the pair of squeezing rollers; one of the pair of squeezing rollers is an elastic squeezing roller, and the other is a rigid squeezing roller.

[0016] In some embodiments of the first aspect, the rigid squeezing roller and the rigid dyeing roller are drivingly connected. In some embodiments of the first aspect, the dyeing tank has a liquid inlet and a liquid outlet, the liquid inlet is arranged at the feed end of the dyeing tank, and the liquid outlet is arranged at the discharge end of the dyeing tank.

[0017] In the second aspect, the embodiments of the present application further provide a dyeing combination machine, which comprises the dyeing assembly according to any one of the above embodiments.

[0018] The embodiments of the present application have the following advantages: The dyeing assembly provided by the present application has the core of arranging a plurality of dyeing rollers in the dyeing tank along the length direction of the dyeing tank in sequence, and the dyed material (yarn) is alternately wound around the dyeing rollers in an S-shaped manner. Through the S-shaped winding path, the yarn is folded back multiple times in the limited physical space of the dyeing tank, and the movement track is greatly lengthened. This makes the effective processing length of the yarn in the dyeing tank far exceed the geometric length of the dyeing tank itself. Therefore, even if the production speed (yarn linear speed) is increased, the effective soaking time of the yarn in the dyeing liquid can still be guaranteed due to the lengthening of the total path, so as to meet the minimum time requirement of dye adsorption. The movement direction and the contact state with the dyeing liquid of the yarn change once every time the yarn is wound around a dyeing roller. This process is not only simple soaking, but also accompanied by slight mechanical action. The static liquid film boundary layer on the surface of the yarn is broken, which promotes the more efficient diffusion and penetration of dye molecules from the main body of the dyeing liquid to the inside of the yarn fiber, helps to overcome the limit of pure saturation adsorption, and improves the dyeing efficiency. The plurality of dyeing rollers immersed in the dyeing liquid act as moving parts, and their rotation will disturb the surrounding dyeing liquid. This mechanical stirring breaks the static area in the dyeing tank due to slow renewal, so that the dye, auxiliary agent and heat can be quickly mixed and uniform, effectively eliminating the concentration difference and temperature difference in different areas. The stirring action forces the dyeing liquid in each area of the dyeing tank to exchange more fully with the fresh dyeing liquid supplemented by the main circulation system, significantly shortens the "replacement cycle" of the dyeing liquid in the actual action area, and maintains the dynamic consistency of the composition of the dyeing liquid.

[0019] Therefore, the application realizes the improvement of production speed while ensuring or even prolonging the effective dyeing time of the yarn by greatly extending the processing path of the yarn in the fixed space. This makes it possible to improve the production efficiency of the machine (increase the speed) without sacrificing the dyeing rate and product quality, successfully solving the traditional problem of the mutual contradiction between the two. The strong mechanical stirring action of the dyeing roller ensures the high uniformity of the dyeing bath in terms of dye concentration, temperature and additives. The yarn is always in a stable dyeing environment in terms of composition and temperature throughout the long dyeing path, thereby ensuring the consistency of dyeing conditions for each section of the yarn and the inner and outer layers of the yarn, effectively avoiding color difference, color spots and other defects caused by uneven dyeing, and greatly improving the appearance quality and product grade of the fabric. The scheme allows the capacity design of the dyeing bath to be re-evaluated and optimized under the premise of achieving the same or even better dyeing effect. It is possible to reduce the volume of the dyeing bath, thereby reducing the total amount of dyeing liquid, reducing the consumption of chemicals and energy, and shortening the dyeing liquid circulation period, further improving the uniformity and response speed of the dyeing liquid. The dynamic immersion and extrusion process enhances the contact efficiency between the dye and the fiber, to some extent, improves the adsorption rate and final dyeing rate of the dye, and makes the dyeing process more efficient.

[0020] In summary, the application solves the dilemma in the prior art that production efficiency (speed), dyeing depth (dyeing rate) and dyeing quality (uniformity) are difficult to balance, and provides a high-efficiency, high-quality and stable yarn dyeing solution.

[0021] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 A structural schematic diagram of one view of a dyeing assembly provided by an embodiment of the application is shown; Figure 2 A structural schematic diagram of one view of a dyeing assembly provided by another embodiment of the application is shown.

[0024] Main element symbol explanation: 100-dyeing bath; 110-liquid inlet; 120-liquid outlet; 200-dyed object; 300-dyeing roller; 400-dyeing roller; 500-second adjusting member; 600-first adjusting member. DETAILED DESCRIPTION

[0025] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein like or similar constituent elements or features may be denoted by like reference characters, and wherein the embodiments described are only examples of the present application and are not intended to limit the present application.

[0026] It should be noted that when an element or layer is referred to as being "on" another element or substrate, it can be directly on the other element or substrate, or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. Like numbers refer to like elements throughout. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0027] In the present application, unless otherwise explicitly defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be interpreted broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] In addition, the terms "first", "second", etc. are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly defined.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the template herein is only for the purpose of describing the specific embodiments and is not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0030] In existing yarn dyeing processes, especially when using a dyeing and sizing machine, the following technical bottlenecks are common: First, when yarn is immersed in the dye bath, the dye adsorption process has a saturation limit. Once the adsorption rate reaches saturation, even extending the soaking time cannot effectively increase the dye uptake. To ensure the final product's color depth (dye uptake) meets process requirements, a minimum necessary soaking time must be maintained. Second, the production speed of the dyeing and sizing machine is fixed, and due to this saturation adsorption characteristic, the speed cannot be further increased. Increasing the speed would shorten the yarn's residence time in the dye bath (i.e., soaking time), leading to insufficient dye adsorption and failing to meet the specified dye uptake rate, severely affecting product quality consistency. Third, existing dye baths are typically designed to be large to ensure sufficient processing space for the yarn. However, large-capacity dye baths lead to another prominent problem: long dye liquor circulation cycles and slow renewal speeds. This makes it easy for dye concentration and temperature gradients to occur in different areas of the dye bath, making it difficult to maintain dye liquor uniformity. This unevenness is directly transmitted to the yarn, causing uneven dyeing. Ultimately, this manifests as obvious color differences and color variations after the fabric is woven, seriously affecting the appearance quality and product grade of the fabric.

[0031] Therefore, existing technologies face a dilemma: ensuring dye uptake rate cannot increase speed, thus affecting efficiency, while the inherent non-uniformity of large dyeing tanks restricts dyeing quality. An innovative solution is urgently needed.

[0032] like Figure 1 and Figure 2 As shown, in order to solve the above-mentioned technical problems, this application provides a dyeing pulp assembly, which includes a dyeing tank and a plurality of upper dyeing rollers 300. The plurality of upper dyeing rollers 300 are disposed in the dyeing tank, and at least some of the plurality of upper dyeing rollers 300 are arranged sequentially along the length direction of the dyeing tank; wherein, the material to be dyed 200 alternately passes around each upper dyeing roller 300 in an S-shape.

[0033] In these embodiments, this application provides a dyeing paste assembly, including a dyeing tank and a plurality of dyeing rollers 300. The dyeing tank is used to contain dye liquor (not labeled), and its internal space forms a dyeing processing area. The plurality of dyeing rollers 300 are disposed in the dyeing tank and arranged sequentially along the length of the dyeing tank. For example, this embodiment has four dyeing rollers 300: a first dyeing roller 300, a second dyeing roller 300, a third dyeing roller 300, and a fourth dyeing roller 300, which are arranged in parallel and with their axes horizontal. Of course, in other embodiments, the number of dyeing rollers 300 may also be 2, 3, 5, 6, or 7, etc.

[0034] The dyed material 200 (such as yarn) is alternately wound around the outer peripheral surface of each dyeing roller 300 in an S-shaped path, that is, after entering the dyeing tank from the inlet, the yarn is first wound downward past the bottom of the first dyeing roller 300, then wound upward past the top of the second dyeing roller 300, then wound downward past the bottom of the third dyeing roller 300, and then wound upward past the top of the fourth dyeing roller 300, and finally led out from the outlet to the subsequent dyeing tank 100 or drying unit.

[0035] Through the above S-shaped wiring mode, the yarn passes through the dyeing liquid multiple times in a unit stroke, realizing multi-section immersion and extrusion dyeing. Each time the yarn passes through the dyeing roller 300, the yarn not only fully contacts the dyeing liquid, but also deforms slightly under the pressure of the roller body, promoting the diffusion of dye into the fiber, thereby significantly improving the effective dyeing rate per unit time.

[0036] This structure breaks through the bottleneck that the adsorption rate is limited by the saturation equilibrium in the traditional single soaking mode. Even at a higher vehicle speed, the equivalent dyeing time can still be extended by increasing the number of winding around the roller, thereby ensuring that the final dyeing rate meets the process requirements. Therefore, the embodiment solves the problem of speed increase caused by adsorption saturation in the prior art.

[0037] In addition, since multi-section short-range dyeing is used instead of large-volume one-time immersion, the dyeing tank in the embodiment can be designed to have a smaller volume (for example, only 40% to 60% of the traditional dyeing tank), which significantly reduces the total amount of dyeing liquid. The small-capacity dyeing tank cooperates with the high-efficiency circulating pump system to realize full-tank circulation and update of the dyeing liquid within a few seconds, effectively avoiding concentration gradient and temperature stratification, improving dyeing liquid uniformity, and thereby reducing dyeing defects such as color difference and color bloom.

[0038] For example, at least two of the plurality of dyeing rollers 300 are rotatable driven rollers, and preferably all of the dyeing rollers 300 are connected with independent or linked driving motors. For example, the second dyeing roller 300 is a driving roller driven by a variable frequency motor to control the running speed of the yarn, and the remaining dyeing rollers 300 are driven rollers that rotate freely under the driving of the yarn while applying appropriate tension.

[0039] The driving structure enables the yarn to maintain stable tension and uniform motion when winding around each dyeing roller 300, avoiding slipping or accumulation, and ensuring the consistency of each section of the dyeing process. More importantly, the actively driven dyeing roller 300 can form a dynamic liquid film on its surface, enhancing the relative motion between the dyeing liquid and the yarn and improving the mass transfer efficiency.

[0040] For example, the dyeing tank adopts a narrow and deep structure, with a width smaller than that of a traditional dyeing tank and a relatively increased depth to adapt to the S-shaped winding path. The bottom of the dyeing tank is provided with a plurality of jet ports connected to an external circulating pump and a filtering and heating device to form a closed loop circulating system.

[0041] The circulation system can complete full-tank dye liquor renewal every 3-5 seconds, which is much faster than the tens of seconds or even minutes of circulation cycle of traditional large dye tanks. The high-speed circulation combined with S-shaped multi-section immersion dyeing enables the dye liquor to maintain high uniformity in both spatial and temporal dimensions, significantly reducing the risk of local concentration deviation.

[0042] In some embodiments, any two adjacent upper dyeing rollers 300 are formed with a height difference in the height direction of the dye tank.

[0043] In the present embodiment, the plurality of upper dyeing rollers 300 are not only arranged in sequence along the length direction of the dye tank, but also any two adjacent upper dyeing rollers 300 are formed with a preset height difference in the height direction of the dye tank.

[0044] For example, in the present embodiment, the first upper dyeing roller 300 is arranged at the bottom region of the dye tank; the second upper dyeing roller 300 is upwardly offset relative to the first upper dyeing roller 300 and located at the middle layer position; and the third upper dyeing roller 300 is downwardly offset relative to the second upper dyeing roller 300. Thus, the three upper dyeing rollers 300 are staggered in a "Z" shape in the vertical direction.

[0045] The arrangement of the height difference enables the dyed object 200 (yarn) to have a clear up-and-down fluctuation when winding around the adjacent upper dyeing rollers 300, instead of a horizontal and smooth transition. For example: The yarn is wound upward from the first upper dyeing roller 300 (low position) to the second upper dyeing roller 300 (high position), forming an upward inclined section; and then downward from the second upper dyeing roller 300 to the third upper dyeing roller 300 (second low position), forming a downward inclined section.

[0046] The yarn is stretched and bent during the climbing and descending process, and micro gaps are generated inside the fiber bundle, which is beneficial to the diffusion of dye liquor to the fiber core layer, improving the dyeing rate and uniformity.

[0047] When the yarn rises from the low-position roller, part of the adsorbed dye liquor naturally drips due to gravity, achieving preliminary liquid removal; and the yarn is immersed in the dye liquor again after entering the high-position roller, completing a new round of adsorption. This "adsorption-liquid removal-re-adsorption" cycle simulates multiple short-time immersion processes, effectively breaking through the single saturation adsorption limit.

[0048] The staggered roller group layout avoids the local flow field blockage caused by the collinearity of multiple rollers, enabling the dye liquor to form a more complex turbulent flow field in the tank, promoting overall mixing uniformity and reducing dead angle areas.

[0049] The gravity component generated by the height difference can naturally adjust the yarn tension without the need for additional tension rollers, preventing roller entanglement or yarn breakage.

[0050] In one embodiment, the height difference H between adjacent dyeing rollers 300 is 50mm-200mm. For example, the height difference between the first dyeing roller 300 and the second dyeing roller 300 is 120mm, and the height difference between the second dyeing roller 300 and the third dyeing roller 300 is 80mm. This range can ensure a significant change in the running angle (preferably, the inclination angle θ is 15°-45°), and can also prevent the yarn from running unstably or the dyeing tank structure from being too complex due to being too high.

[0051] In some embodiments, at least two adjacent dyeing rollers 300 form a pressing fit with the dyed object 200.

[0052] In the present embodiment, at least one pair of adjacent dyeing rollers 300 (for example, the second dyeing roller 300 and the third dyeing roller 300) apply a preset pressure when the dyed object 200 passes around the surfaces thereof, so that the yarn is in a pressed state when passing through the gap between the two rollers, i.e., a "pressing fit" is formed.

[0053] Specifically, the pressing fit is achieved in the following manner: The second dyeing roller 300 and the third dyeing roller 300 are arranged in parallel, and the mounting seat of at least one of the roller bodies is adjustable (such as a sliding support or an elastic support), and an acting force in the direction of the other roller body is applied through a pneumatic / hydraulic cylinder or a spring mechanism; The center distance between the two rollers is slightly smaller than the sum of the theoretical diameters of the yarn after being fully soaked in the dyeing liquid, or is set to be 5%-20% larger than the dry yarn diameter according to process requirements, to ensure that the yarn can be effectively pressed without damaging the fiber; When the yarn passes from the second dyeing roller 300 to the third dyeing roller 300, it must pass through the narrow channel formed by the outer circumferential surfaces of the two rollers, and is subjected to radial compression, forcing the internal trapped air to be discharged and the excess dyeing liquid to be squeezed out and returned to the dyeing tank.

[0054] The pressing fit promotes the diffusion of the dye into the interior of the fiber: during the pressing process, the yarn fiber bundle is slightly deformed, and the intercellular gap is increased, which is beneficial for the dye molecules to overcome the diffusion energy barrier and quickly enter the interior of the fiber, thereby improving the dyeing rate and the fixation rate.

[0055] In addition, the amount of floating color and the amount of liquid carried are reduced: the free dye and excess dyeing liquid that are not absorbed by the fiber are actively squeezed out before the yarn exits the tank, which significantly reduces the loss of dye carried out of the tank, saves the amount of dye used, and reduces the subsequent washing burden, in line with the trend of green production.

[0056] The dyeing uniformity is improved: the pressing process has a "homogenization" effect, which makes the liquid content rate of each section of the entire yarn tend to be consistent, and avoids local over-concentration that leads to color variation or striping.

[0057] In one embodiment, the pair of dyeing rollers 300 are formed in a press-fit, one of which is an elastic coating roller (e.g. rubber or polyurethane coating, Shore A hardness 60-80), and the other is a metal smooth roller. The elastic roller deforms locally under pressure to form a line contact instead of a point contact, expanding the pressing area and improving uniformity and safety.

[0058] Further, the control system can automatically adjust the pressing force between the two rollers according to different yarn varieties (e.g. cotton, polyester, spandex core-spun yarn, etc.), ranging from 50N to 300N, to ensure adaptation to various process conditions.

[0059] In some embodiments, any two adjacent dyeing rollers 300 form a press-fit with the dyed object 200. All dyeing rollers 300 include at least one rigid dyeing roller 300 and at least one elastic dyeing roller 300.

[0060] In these embodiments, a plurality of dyeing rollers 300 are arranged in sequence along the length of the dyeing tank, and any two adjacent dyeing rollers 300 form a press-fit with the dyed object 200. That is, between the first dyeing roller 300 and the second dyeing roller 300, and between the second dyeing roller 300 and the third dyeing roller 300, a gap region with a predetermined pressure is formed, and the yarn undergoes an active pressing process when passing through each pair of adjacent dyeing rollers 300.

[0061] The "press-fit" refers to the center distance between the two adjacent dyeing rollers 300 being set slightly smaller than the sum of the equivalent diameters of the yarn in a saturated liquid absorption state, or the two rollers are brought closer to each other by an external force mechanism (e.g. air cylinder, spring, servo motor, etc.), thereby generating a radial compression force on the path through which the yarn passes, forcing the air trapped inside the fiber bundle to be expelled, and the unabsorbed free dye liquor to be squeezed out and returned to the dyeing tank.

[0062] Further, all dyeing rollers 300 include at least one rigid dyeing roller 300 and at least one elastic dyeing roller 300. In one embodiment: The second dyeing roller 300 is a rigid dyeing roller 300 made of a metal material (e.g. stainless steel or aluminum alloy), with a smooth surface or micro-texture, for providing stable support and guidance; The first dyeing roller 300 and the third dyeing roller 300 are elastic dyeing rollers 300, with an elastic layer (e.g. polyurethane, rubber or silicone) coated on the outer periphery, Shore A hardness 60-80, and thickness 5-15mm.

[0063] When the yarn passes through the gap between each pair of adjacent dyeing rollers 300 in sequence, the following rigid-elastic combined pressing structure is formed: Between the first dyeing roller 300 and the second dyeing roller 300: the elastic roller is deformed under pressure and forms a line contact extrusion with the rigid roller, with a large contact area and uniform stress distribution, avoiding local pressure injury to the fiber; Between the second dyeing roller 300 and the third dyeing roller 300: the rigid roller and the elastic roller again form another set of line contact extrusion pairs to achieve secondary reinforcement penetration.

[0064] Each pair of dyeing rollers 300 completes one "immersion-extrusion" cycle, simulating multiple short-time dyeing processes. Even at high speeds, the equivalent dyeing time can be effectively extended by increasing the number of extrusions, significantly improving the dyeing rate and overcoming the problem of insufficient dyeing caused by insufficient residence time in traditional processes.

[0065] The rigid roller provides precise position positioning and stable pressure transmission; the elastic roller buffers impact through deformation to prevent brittle fiber breakage or hairiness; the line contact mode has lower unit area pressure than point contact or rigid-rigid surface contact, making it more suitable for fine denier, high denier, or sensitive yarns (such as Tencel, Modal, and spandex core yarns).

[0066] During the extrusion process, the internal pores of the fiber bundle open, making it easier for dye molecules to diffuse to the core layer; at the same time, the extruded floating dye solution re-enters the cycle, avoiding excessive local concentration and improving the consistency of whole yarn dyeing.

[0067] The compression amount of the elastic dyeing roller 300 automatically adjusts with changes in yarn thickness, has a certain tolerance capacity, and is suitable for switching between different yarn density varieties without frequent roller replacement or parameter recalibration.

[0068] In some embodiments, the dyeing assembly further includes a first adjusting member 600, and each elastic dyeing roller 300 is provided with a corresponding first adjusting member 600, which can adjust the distance between the corresponding elastic dyeing roller 300 and the adjacent dyeing roller 300.

[0069] In these embodiments, the dyeing assembly further includes a first adjusting member 600, which is configured in one-to-one correspondence with the elastic dyeing roller 300. That is, each elastic dyeing roller 300 is equipped with an independent first adjusting member 600 for adjusting the relative distance between the elastic dyeing roller 300 and the adjacent dyeing roller 300, thereby dynamically controlling the extrusion fit strength formed between the two.

[0070] For example, the first dyeing roller 300 is an elastic dyeing roller 300, its mounting support is connected with a first adjusting member 600; the second dyeing roller 300 is also an elastic dyeing roller 300, its mounting support is connected with a first adjusting member 600; and the third dyeing roller 300 is a rigid dyeing roller 300, which is fixedly installed or controlled by another type of adjusting mechanism.

[0071] The first adjusting member 600 respectively acts on the bearing seat of the elastic dyeing roller 300, drives it to move along the direction perpendicular to the roller shaft, and further changes the center distance between it and the adjacent rigid dyeing roller 300.

[0072] In an embodiment, the first adjusting member 600 is an electric actuator, specifically comprising: a servo motor or a stepper motor; a worm gear transmission unit or a ball screw mechanism; a displacement sensor (for feedback of actual position); The target distance value is set by the control system, the motor drives the screw to rotate, and the elastic dyeing roller 300 is lifted to realize millimeter-level precision distance adjustment.

[0073] In other embodiments, the first adjusting member 600 can also use: a pneumatic cylinder (with pressure regulating valve and position locking function); a hydraulic cylinder (suitable for large tonnage pressure adjustment); a manual screw adjusting mechanism (for small batch debugging or low-cost models); Adjust according to color depth: Dark color dyeing requires higher dyeing rate, the system automatically reduces the distance to enhance the extrusion and penetration effect; For light color dyeing, the distance is appropriately widened to avoid excessive extrusion leading to color mottle.

[0074] Linkage adjustment according to vehicle speed: When the production speed increases, the system automatically reduces the distance of each extrusion area to compensate for the dyeing loss due to the shortening of the residence time, and maintains the stability of the final dyeing rate.

[0075] In some embodiments, the first adjusting member 600 includes a first driving part and a first swing part, the first swing part has a first swing axis, the first swing part can rotate around the first swing axis, the first swing part is provided with an elastic dyeing roller, the first swing axis and the axis of the elastic dyeing roller 300 are arranged in parallel, the first driving part and the first swing part are connected, and the first driving part can drive the first swing part to rotate around the first swing axis.

[0076] In these embodiments, the first adjusting member 600 includes a first driving part and a first swing part. The first swing part has a first swing axis, which extends in a horizontal direction and is arranged in parallel with the rotation axis of the elastic dyeing roller 300. The first swing part is rotatably mounted on the side wall support of the dyeing tank through a bearing or a hinged structure, forming a lever mechanism with a fulcrum.

[0077] The two ends of the elastic dyeing roller 300 are rotatably arranged on the distal arms of the first swing part, that is, when the first swing part rotates around the first swing axis, the entire elastic dyeing roller 300 is driven to move in an arc shape, thereby changing the relative distance between the elastic dyeing roller 300 and the adjacent dyeing roller 300 (such as the rigid dyeing roller 300), and realizing dynamic adjustment of the extrusion fitting strength.

[0078] The first driving part is connected with the first swing part and is used for driving the first swing part to rotate around the first swing axis. In an embodiment, The first driving part is an electric push rod or a servo cylinder, a fixed end of which is hinged to the dyeing tank frame, and a telescopic end of which is hinged to the driving arm of the first swing part; When the first driving part is elongated or shortened, a pushing force or a pulling force is applied to force the first swing part to be angularly deflected (for example, within ±15°); The elastic dyeing roller 300 moves with the swing part, and the lowest point position of the elastic dyeing roller 300 changes, thereby adjusting the vertical distance between the elastic dyeing roller 300 and the rigid dyeing roller 300 above.

[0079] The first swing axis is located above the elastic dyeing roller 300 and slightly deviates inward (close to the center of the dyeing tank), forming a short-arm-long-arm lever structure; The first driving part acts on the long-arm section to realize a moment amplification effect, so that a small stroke driving can generate a larger roller position adjustment amount.

[0080] For example, when it is required to reduce the extrusion distance by 2 mm, the control system instructs the first driving part to push the swing part to rotate by 8.5°, and after calibration, the actual error is ≤±0.1 mm.

[0081] As shown in FIG. 1, Figure 1 In some embodiments, the present application includes one rigid dyeing roller and two elastic dyeing rollers, the first adjusting member includes a first driving part and a first swing part, the first swing part has a first swing axis, the first swing part is rotatable around the first swing axis, the first swing part is rotatably arranged with an elastic dyeing roller, the first swing axis and the axis of the elastic dyeing roller are arranged in parallel, the first driving part is telescopically arranged, a fixed end of the first driving part is hinged to one of the elastic dyeing rollers, and a telescopic end of the first driving part is hinged to the other elastic dyeing roller, and the first driving part can drive the two first swing parts to rotate around the first swing axis to move closer to or away from each other.

[0082] In some embodiments, the first swing axis is located at the top end of the first swing part, and the elastic dyeing roller 300 is located at the bottom end of the first swing part.

[0083] In these embodiments, the first swing part is configured as a rigid arm structure, the top end of which is provided with a first swing axis, which is installed on the side wall support of the dye vat through a bearing or a hinge pin shaft to form a fixed fulcrum, and the bottom end is provided with a mounting seat for rotationally supporting the elastic upper dye roller 300. Thus, the entire first swing part constitutes a single-arm lever mechanism with the top end as the fulcrum and the bottom end as the working end.

[0084] When the first driving part applies a force, it pushes or pulls the first swing part to rotate around the first swing axis, and the bottom end moves along a circular arc trajectory, thereby driving the elastic upper dye roller 300 to rise or fall, achieving precise adjustment of the distance between the adjacent upper dye rollers 300 (such as rigid upper dye rollers 300).

[0085] Top end support: the first swing axis A1 is located at the highest position of the first swing part, close to the upper structure of the dye vat, away from the liquid surface of the dye, effectively avoiding dye erosion and sediment accumulation, and improving rotation flexibility and service life; Bottom end bearing: the elastic upper dye roller 300 is suspended at the lowest end of the first swing part, in the dye liquid environment, facilitating the winding of the yarn L and completing the dipping and extrusion process; The first swing part is in the shape of an inverted L or a straight rod, and the material is preferably stainless steel or corrosion-resistant engineering plastic (such as PVC reinforced type), ensuring no deformation during long-term operation.

[0086] This "upper shaft and lower roller" layout brings significant mechanical gain effect: The first driving part acts on the middle or upper-middle driving arm segment of the first swing part (i.e., the force arm is longer), while the load (elastic upper dye roller 300 + yarn pressure) is concentrated at the bottom end (the force arm is shorter); For example: when the driving arm length is 100 mm and the load arm length is 40 mm, the mechanical gain ratio is 2.5:1, significantly reducing the output requirement of the first driving part, which is beneficial to the selection of small and energy-saving actuators.

[0087] Since the elastic upper dye roller 300 moves in a circular arc with the bottom end, its path is not completely vertical and straight. To ensure parallelism with the adjacent rigid upper dye roller 300, the following design optimization is adopted: The position of the first swing axis is determined through kinematic simulation, so that the lifting deviation of the elastic upper dye roller 300 in the vertical direction accounts for more than 95% within the adjustment range (such as ±10° swing angle).

[0088] In some embodiments, the dyeing assembly further comprises a pair of squeezing rollers 400 arranged at the discharge end of the dyeing tank 100, and a squeezing area is formed between the pair of squeezing rollers 400, the dyed material 200 is arranged in the squeezing area to form a squeezing cooperation with the pair of squeezing rollers 400; wherein one of the squeezing rollers 400 is an elastic squeezing roller 400, and the other is a rigid squeezing roller 400.

[0089] In these embodiments, the dyeing assembly not only comprises the dyeing tank and the plurality of squeezing type dyeing rollers 300 in the dyeing tank as described in the foregoing embodiments, but also comprises a pair of squeezing rollers 400 arranged at the discharge end of the dyeing tank 100 for performing a liquid removal and homogenization treatment on the dyed material 200 after the dyeing.

[0090] Specifically, the pair of squeezing rollers 400 are arranged in parallel at the outlet side of the dyeing tank 100, and a slit-shaped squeezing area is formed between the two rollers. After leaving the liquid surface of the dyeing tank 100, the dyed material 200 must pass through the squeezing area to form a squeezing cooperation with the two squeezing rollers 400.

[0091] One of the squeezing rollers 400 is an elastic squeezing roller 400, and the outer periphery of the elastic squeezing roller 400 is covered with an elastic layer (such as polyurethane or rubber) with a Shore A hardness of 60-80 and a thickness of 5-15 mm; The other is a rigid squeezing roller 400 made of a metal material (such as stainless steel) with a smooth surface or micro-texture; The elastic squeezing roller 400 and the rigid squeezing roller 400 are arranged oppositely, and the center distance therebetween is adjustable, preferably slightly smaller than the sum of the diameters of the yarns in the wet state, so as to achieve effective squeezing.

[0092] In one embodiment, the rigid squeezing roller 400 is located below as a driving roller connected to a variable frequency motor (not shown) for pulling the yarns to run, and the elastic squeezing roller 400 is located above as a driven roller which is deformed elastically to adapt to the fluctuations of the yarns and form a line contact type squeezing.

[0093] For example, the elastic squeezing roller 400 is connected with a second adjusting member 500 for adjusting the distance between the pair of squeezing rollers 400, thereby adjusting the squeezing force on the dyed material 200. Optionally, the second adjusting member 500 is a pneumatic cylinder, a hydraulic cylinder or an electric push rod.

[0094] In some embodiments, the rigid squeezing roller 400 and the rigid dyeing roller 300 are drivingly connected. And / or, the dyeing tank 100 has a liquid inlet 110 and a liquid outlet 120, the liquid inlet 110 is arranged at the feed end of the dyeing tank 100, and the liquid outlet 120 is arranged at the discharge end of the dyeing tank 100.

[0095] In this embodiment, the rigid discharge roller 400 and the rigid dyeing roller 300 are connected by a transmission mechanism to achieve power connection, so that they run synchronously or in coordination according to a preset speed ratio.

[0096] Specifically, the transmission mechanism can be a synchronous belt transmission, a chain transmission or a gear train, preferably a corrosion-resistant polyurethane synchronous belt matched with a stainless steel pulley structure.

[0097] The power source is provided by a main drive motor, which is divided into two paths after a reduction gearbox: one path drives the rigid dyeing roller 300 in the dyeing tank, and the other path is transmitted to the rigid discharge roller 400 at the outlet of the dyeing tank 100 through the transmission mechanism. The control system uniformly controls the speed of the main motor to ensure that the running speed of the dyed material 200 in the entire dyeing process is consistent, avoiding tension fluctuations or yarn stretching deformation caused by differences in traction force in each section.

[0098] In one specific example, the main motor speed is set to 1500 rpm, and after transmission ratio adjustment, the linear speed of the rigid dyeing roller 300 is 80 m / min, and the linear speed of the rigid discharge roller 400 is matched to 80.2 m / min (slightly faster than the previous section, forming a slight traction tension), and the actual measurement shows that the yarn runs stably without slipping, breaking or pilling.

[0099] In some embodiments, the dyeing tank 100 is provided with a liquid inlet 110 and a liquid outlet 120 for realizing dynamic updating and concentration balancing of the sizing liquid. The liquid inlet 110 is arranged at the inlet end of the dyeing tank 100 (i.e. the side where the dyed material 200 enters the dyeing tank 100), and fresh sizing liquid is injected from here. The liquid outlet 120 is arranged at the outlet end of the dyeing tank 100 (i.e. the side where the dyed material 200 leaves the dyeing tank 100 and enters the group of discharge rollers 400), and is used to discharge part of the old sizing liquid or to circulate back. A directional flow path is formed between the liquid inlet 110 and the liquid outlet 120, pointing from the inlet end to the outlet end, and the flow direction of the sizing liquid is consistent with the running direction of the yarn.

[0100] When the yarn enters the dyeing tank 100 from the front end, the sizing liquid concentration is the highest (new liquid injection), and as it progresses, it continuously adsorbs sizing material, and the sizing liquid concentration gradually decreases at the rear end. By replenishing new liquid at the front end and discharging old liquid at the rear end, the concentration decay is effectively compensated, and the sizing liquid uniformity in the entire tank is maintained. Continuous flow breaks the static balance, avoiding the deposition of starch-based sizing material at the bottom or the formation of dry sizing film on the surface. When changing the sizing material variety, the dyeing tank 100 can be quickly cleaned and replaced through the liquid inlet and outlet 120, shortening the downtime.

[0101] In one embodiment, the liquid inlet 110 is equipped with a flow regulating valve, which can automatically adjust the liquid replenishment rate according to the speed of the vehicle (e.g. 0.5 L / min to 3 L / min). The liquid outlet 120 is arranged 10-20 mm below the liquid level to avoid sucking in foam; the sizing liquid updating period is controlled within 5-15 minutes to ensure stable viscosity and solid content.

[0102] In some embodiments, the present application also provides a dyeing and sizing combination machine, which comprises the dyeing and sizing assembly according to any one of the above embodiments.

[0103] In these embodiments, the present application also provides a dyeing and sizing combination machine, which comprises the dyeing and sizing assembly, the dyeing tank 100, the drying unit and the control system as described above. The dyeing and sizing assembly is located at the front end to complete the preliminary dyeing; then the yarn enters the dyeing tank 100 for sizing treatment; then it is dried and shaped by the drying unit; finally it is wound by the winding mechanism.

[0104] The control system integrates a vehicle speed adjustment module, which can automatically match the number of dyeing rollers 300, the winding path and the production vehicle speed according to the set target of dyeing rate. For example, when high vehicle speed production is needed, the system automatically enables all three dyeing rollers 300 and adjusts the tension parameters to maintain sufficient equivalent immersion time.

[0105] In all examples shown and described herein, any specific values should be interpreted as merely exemplary and not as a limitation, and thus other examples of the exemplary embodiments can have different values.

[0106] It should be noted that similar reference numbers and letters refer to similar items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0107] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A dyeing pulp assembly, characterized in that, The dyeing assembly includes: Dye vat; Multiple dyeing rollers are arranged in the dyeing tank, and at least some of the dyeing rollers are arranged sequentially along the length of the dyeing tank; wherein the material to be dyed alternately and sequentially passes around each of the dyeing rollers in an S-shape.

2. The dyeing pulp assembly according to claim 1, characterized in that, In the height direction of the dyeing tank, there is a height difference between the dyed materials on any two adjacent upper dyeing rollers.

3. The dyeing pulp assembly according to claim 1, characterized in that, At least two adjacent dyeing rollers form a compression fit with the material being dyed.

4. The dyeing pulp assembly according to claim 3, characterized in that, Any two adjacent dyeing rollers form a compression fit with the material being dyed; All of the dyeing rollers include at least one rigid dyeing roller and at least one elastic dyeing roller.

5. The dyeing pulp assembly according to claim 4, characterized in that, The dyeing assembly also includes: The first adjusting member is provided for each of the elastic dyeing rollers. The first adjusting member can adjust the distance between the corresponding elastic dyeing roller and the adjacent dyeing roller.

6. The dyeing pulp assembly according to claim 5, characterized in that, The first adjusting member includes a first driving part and a first swinging part. The first swinging part has a first swinging axis and can rotate around the first swinging axis. The first swinging part is rotatably provided with the elastic dyeing roller. The first swinging axis and the axis of the elastic dyeing roller are arranged parallel to each other. The first driving part and the first swinging part are connected. The first driving part can drive the first swinging part to rotate around the first swinging axis. Alternatively, at least one of the rigid dyeing rollers may have an elastic dyeing roller on each side. The first adjusting member includes a first driving part and a first swinging part. The first swinging part has a first swinging axis and can rotate around the first swinging axis. The elastic dyeing roller is rotatably mounted on the first swinging part. The first swinging axis and the axis of the elastic dyeing roller are arranged parallel to each other. The first driving part is telescopically mounted. The fixed end of the first driving part is hinged to one of the elastic dyeing rollers, and the telescopic end is hinged to the other elastic dyeing roller. The first driving part can drive the two first swinging parts to rotate around the first swinging axis to move closer to or further away from each other.

7. The dyeing pulp assembly according to claim 6, characterized in that, The first swing axis is located at the top of the first swing part, and the elastic dyeing roller is located at the bottom of the first swing part.

8. The dyeing and paste assembly according to any one of claims 1 to 7, characterized in that, The dyeing assembly also includes a pair of discharge rollers, which are disposed at the discharge end of the dyeing tank. A compression zone is formed between the pair of discharge rollers, and the material to be dyed passes through the compression zone to form a compression fit with the pair of discharge rollers. One of the discharge rollers is an elastic discharge roller, and the other discharge roller is a rigid discharge roller.

9. The dyeing pulp assembly according to claim 8, characterized in that, The rigid discharge roller and the rigid dyeing roller are connected by a drive mechanism; And / or, the dyeing tank has an inlet and an outlet, the inlet being located at the feed end of the dyeing tank and the outlet being located at the discharge end of the dyeing tank.

10. A dyeing and pulping combined machine, characterized in that, The dyeing and pulping unit includes the dyeing and pulping components as described in any one of claims 1 to 9.

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