Dip dyeing device for China-hemp cotton knitted fabric

Abstract

The utility model discloses a hemp cotton knitted fabric dip dyeing device which comprises a dip dyeing box body with a dip dyeing cavity, a plurality of cloth guide roller assemblies used for unfolding and conveying to-be-dyed fabric are sequentially arranged in the dip dyeing cavity in a staggered mode in the conveying direction of the to-be-dyed fabric, and each cloth guide roller assembly comprises a fixed cloth guide roller. The movable cloth guide roller is arranged on the upper portion of the fabric to be dyed and staggered with the fixed cloth guide roller, a horizontal adjusting area allowing the fabric to be dyed to penetrate through is formed between the fixed cloth guide roller and the movable cloth guide roller, and a control device used for driving the movable cloth guide roller to ascend and descend is arranged on the dip dyeing box body. Through the fixed cloth guide rollers and the movable cloth guide rollers which are arranged in a vertically staggered mode, the optimal dip dyeing curvature of gray fabric can be flexibly adjusted, the fabric is dyed in a relatively loose state, and the size stability and the good cloth cover effect of the China-hemp cotton knitted fabric are obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cotton and linen fabric post-finishing, in particular to an impregnation dyeing device for hemp-cotton knitted fabrics. Background Art

[0002] With the continuous development of social economy and the improvement of living standards, people pay more and more attention to the comfort and health of clothing. Linen fabrics have been highly sought after in recent years because of their breathability, coolness, comfort, antibacterial, anti-bacterial and anti-ultraviolet functions. Cotton and linen blended fabrics have the advantages of cotton and linen, such as softness, moisture absorption, breathability, comfortable and smooth wearing, antibacterial and anti-ultraviolet, and non-irritating to the skin. They have gradually become the preferred fabrics for high-end clothing. The hemp fibers used in clothing mainly include ramie, flax and hemp. Hemp is a modified hemp product. It feels the softest among the three types of hemp. It is used as underwear and will not be itchy and uncomfortable, so it has the highest comfort. However, since hemp fibers are very short and difficult to weave, the price of clothing made of hemp is relatively high. It is difficult to see 100% hemp products on the market. They are usually woven together with cotton fibers, which is the common cotton and linen fabrics we see. Since the main disadvantage of hemp is that it has basically no elasticity, low elasticity means that the fabric is prone to wrinkles after stretching and folding. In order to improve the problem of poor elasticity of hemp and improve the wearing performance of hemp cotton fabrics, the current cotton and linen fabric structure is mainly based on soft, comfortable, elastic and well-shaped knitted fabrics.

[0003] After the fabric grey cloth has been bleached and scoured, it needs to be processed into dyed cloth by dyeing. The existing fabric dyeing method usually adopts the immersion dyeing process. After the fabric is immersed in the dye and soaked for a period of time, the dye will diffuse into the fabric fiber and adhere to the fiber, so that the dye is firmly attached to the fabric, making the fabric have rich colors. In view of the problems of easy deformation of knitted fabrics in open-width roller dyeing, wrinkles and uneven dyeing caused by uneven tension, and knitted fabrics are coil structures, easy to stretch, and suitable for loose processing, so the current cotton and linen knitted fabrics are mainly immersion dyeing, such as overflow dyeing and jet dyeing. The existing technologies for cotton and linen fabrics are as follows:

[0004] CN211171189U discloses a cotton and linen fabric dyeing device, including a processing device, a cloth roller frame, a cloth roller body, a dyeing tank, a drying plate and a winding motor, wherein the processing device is a rectangular box-shaped structure with a processing bin inside, and the cloth roller frame is installed on one side of the processing device, and the upper end of the processing device facing the cloth roller frame is provided with a feed channel connected to the processing bin, and the upper end of the processing device away from the cloth roller frame is provided with a discharge channel connected to the processing bin, the cloth roller frame is a rectangular frame structure, and is connected to the processing device through four groups of connecting rods arranged at four corners, a group of cloth feed shafts with a height flush with the feed channel are installed in the cloth roller frame, and two groups of oblique installation grooves for installing the cloth roller body are symmetrically provided on the side of the bottom end of the cloth roller frame away from the processing device. The cotton and linen fabric dyeing device has a reasonable structure, strong applicability, and is convenient for fabric racking and uniform dyeing.

[0005] CN 112626756 A discloses a cotton and linen fabric dyeing device, comprising a dyeing shell, a dyeing tank is provided on the top of the dyeing shell, a heating tank is provided inside the dyeing shell, two symmetrically arranged side tanks are provided inside the heating tank, the heating tank is located below the dyeing tank, two symmetrically arranged slide grooves are provided on the top of the dyeing shell, a slide rod is slidably connected inside the slide groove, and a feeding roller is fixedly connected to one end of the slide rod; there are two connecting shells, one side of the connecting shell is slidably connected to a connecting rod, the outer wall of the connecting rod is sleeved with a spring, and a slide plate is fixedly connected to one end of the connecting rod; when the cotton and linen fabric is dyed, the feeding roller can be conveniently pulled out by pulling a pull plate, so that the feeding is simple and convenient and will not be interfered by the equipment. After wrapping the cotton and linen fabric, the feeding roller can be placed on the equipment by pulling the pull plate. At the same time, during the dyeing, the dye solution is prevented from solidifying by heating and stirring.

[0006] At present, hemp cotton knitted fabrics are mainly faced with two problems in actual production. First, during the dyeing process, the hemp cotton knitted fabric needs to be input into the dyeing tank from one side of the dyeing equipment, and then pass through several cross-arranged cloth guide rollers and output from the other side of the dyeing equipment. This process is currently operated manually, and the dyeing tank is generally long. Two workers need to pull the fabric from one side of the dyeing equipment and cross-wrap it up and down on the cloth guide rollers in turn. The work intensity is relatively high, and the fabric needs to be prevented from tilting and stacking during the cross-winding process to avoid affecting the uniformity of dyeing, which leads to low work efficiency. Second, due to the poor stability of knitted fabrics, knitted fabrics are more easily deformed than woven fabrics. Especially during the dyeing process, the knitted fabrics are easily stretched and deformed under the tensile tension of the conveying rollers on both sides and several cloth guide rollers, making it impossible to guarantee the dimensional stability and fabric effect of the hemp cotton knitted fabrics.

[0007] In summary, although the existing dyeing devices have improved the uniformity of dyeing, the two problems of high labor intensity of workers and poor dimensional stability are still not solved. Compared with flax, hemp has a coarser fiber and higher strength, so its elasticity is worse. Therefore, hemp knitted fabrics are more susceptible to tension during the dyeing process, resulting in dimensional instability. The above problems have also been a topic of concern in the knitting industry for a long time. For this purpose, many process technologies have been studied and established, and related equipment has been developed, but ideal results have never been achieved. There are still problems such as unstable size, high work intensity, and low efficiency, which has become a difficult problem that technicians in the field of hemp-cotton knitted fabric dyeing are currently facing. Summary of the invention

[0008] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide an impregnation dyeing device for hemp-cotton knitted fabrics, which can effectively reduce the labor intensity of workers, significantly improve the problem of dimensional stability affected by excessive tension, and improve dyeing uniformity.

[0009] In order to solve the above technical problems, the technical solution adopted by the utility model is: an impregnation dyeing device for hemp-cotton knitted fabrics, comprising an impregnation box with an impregnation chamber, a feed roller for conveying the fabric to be dyed into the impregnation box is provided on one side of the impregnation box, and a discharge roller for outputting the impregnated fabric is provided on the other side, a steam heating pipe for heating the dye solution is provided in the impregnation chamber, and a drainage pipe connected to the impregnation chamber is provided at the bottom of the impregnation box, characterized in that: a plurality of guide roller assemblies for unfolding and conveying the fabric to be dyed are arranged alternately in sequence in the impregnation chamber along the conveying direction of the fabric to be dyed, the guide roller assembly comprises fixed guide rollers arranged in sequence at the lower part of the fabric to be dyed along the conveying direction of the fabric to be dyed, and movable guide rollers arranged alternately with the fixed guide rollers on the upper part of the fabric to be dyed, a horizontal adjustment area allowing the fabric to be dyed to pass through is formed between the fixed guide roller and the movable guide roller, and a control device for driving the movable guide roller to rise and fall is provided on the impregnation box.

[0010] The above-mentioned impregnation dyeing device for hemp-cotton knitted fabrics, the control device includes fixed plates symmetrically arranged on the inner wall of the dyeing box, and movable plates that can be lifted and moved along the inner wall of the dyeing box are respectively arranged on the two fixed plates, the movable cloth guide rollers are sequentially arranged between the two movable plates along the length direction of the two movable plates, and servo motors for synchronously driving the two movable plates to lift and lower are respectively provided on the two fixed plates.

[0011] The above-mentioned impregnation dyeing device for hemp-cotton knitted fabrics, the fixed plate includes a top plate and two side plates fixed to the top plate, a guide groove slidably connected to the movable plate is formed between the two side plates, an adjustment hole is opened on the top plate, a threaded rod threadedly connected to the movable plate is arranged in the adjustment hole, and the servo motor is rotatably connected to the threaded rod.

[0012] The above-mentioned impregnation dyeing device for hemp-cotton knitted fabrics, the movable plate includes a plate body extending along the length direction of the impregnation box, each movable cloth guide roller is rotatably connected to the plate body through a fixed seat, and a plurality of downwardly opening accommodating grooves are provided on the plate body between adjacent movable cloth guide rollers for accommodating each fixed cloth guide roller when the movable plate is lowered.

[0013] The above-mentioned hemp-cotton knitted fabric impregnation dyeing device has a mesh plate for filtering and blocking impurities in the dyeing process laid at the bottom of the dyeing box, and the mesh plate is connected to the dyeing box through a support seat arranged at the bottom of the dyeing chamber.

[0014] In the above-mentioned impregnation dyeing device for hemp-cotton knitted fabrics, a steam conveying circulation pipe connected to the steam heating pipe is arranged at the bottom of the impregnation dyeing box.

[0015] In the above-mentioned impregnation dyeing device for hemp-cotton knitted fabrics, the fixing plate is fixed to the side wall of the impregnation dyeing box by screws.

[0016] In the above-mentioned impregnation dyeing device for hemp-cotton knitted fabrics, both ends of the fixed cloth guide roller are rotatably connected to the inner wall of the impregnation dyeing box through a fixing seat.

[0017] The advantages of the impregnation dyeing device for hemp-cotton knitted fabrics of the utility model are: through the fixed cloth guide rollers and the movable cloth guide rollers staggered up and down, the optimal impregnation and dyeing curvature of the grey cloth can be flexibly adjusted, so that the fabric can be dyed in a relatively relaxed state, which significantly improves the dimensional stability of the hemp-cotton knitted fabric and the good cloth surface effect, not only effectively improves the impregnation and dyeing effect, but also greatly improves the impregnation and dyeing efficiency, reduces the labor intensity of workers, realizes the industrialization purpose of continuous impregnation and dyeing, and is suitable for industrial application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of the overall structure of the utility model;

[0019] Figure 2 It is a side view structural schematic diagram of the utility model;

[0020] Figure 3 for Figure 2 A magnified view of the local structure of part A;

[0021] Figure 4 This is an enlarged view of the structure of the connection between the fixed plate and the movable plate in Example 1;

[0022] Figure 5 (a)-(c) are state diagrams of the movable cloth guide roller at different lifting heights;

[0023] Figure 6This is an enlarged view of the structure of the connection between the fixed plate and the movable plate in Example 2. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Embodiment 1:

[0026] like Figure 1 , 2 As shown, a hemp-cotton knitted fabric impregnation dyeing device includes an impregnation box 2 with an impregnation chamber 1, a feed roller 4 for conveying the fabric 3 to be dyed into the impregnation box 2 is provided on one side of the impregnation box 2, and a discharge roller 5 for outputting the impregnated fabric is provided on the other side. In order to prevent the dye solution from solidifying, improve the dye diffusion efficiency in the dye solution, and improve the dyeing efficiency and dyeing uniformity, a steam heating pipe 6 for heating the dye solution is provided in the impregnation chamber 1, and a steam conveying circulation pipe 7 connected to the steam heating pipe 6 is provided at the bottom of the impregnation box 2. The steam heating pipe 6 of the utility model can adopt the currently commonly used serpentine pipe, and the number and laying area of ​​the steam heating pipe 6 can be selected according to actual production requirements. A drain pipe 8 connected to the impregnation chamber 1 is provided at the bottom of the impregnation box 2, so that when the dye solution needs to be replaced after the impregnation, the waste liquid can be quickly discharged.

[0027] Due to the particularity of hemp fiber, cotton and linen knitted fabrics contain more impurities and have fluff on the surface. After pre-treatment and singeing, the fabric will still be mixed with fallen fluff, which adheres to the surface of the fabric and affects the dyeing effect. In order to avoid the above problems, a mesh plate 9 for filtering and blocking impurities in the dyeing process is laid at the bottom of the dyeing box 2. The mesh plate 9 is connected to the dyeing box 2 through a support seat 10 arranged at the bottom of the dyeing chamber 1. The mesh plate 9 can be a stainless steel metal mesh, and the size of the mesh can be selected according to actual needs.

[0028] In view of the problem of manual cross-winding of grey fabrics, the utility model provides a plurality of cloth guide roller assemblies 11 for unfolding and conveying the fabric to be dyed, which are arranged in sequence in the dyeing chamber 1 along the conveying direction of the fabric to be dyed 3. The cloth guide roller assembly 11 includes fixed cloth guide rollers 12 arranged in sequence at the lower part of the fabric to be dyed 3 along the conveying direction of the fabric to be dyed 3, and movable cloth guide rollers 13 arranged at the upper part of the fabric to be dyed 3 and staggered with the fixed cloth guide rollers 12, and a horizontal adjustment area 14 allowing the fabric to be dyed 3 to pass through is formed between the fixed cloth guide rollers 12 and the movable cloth guide rollers 13, and a control device 15 for driving the movable cloth guide rollers 13 to rise and fall is provided on the dyeing box 2. The control device 15 includes fixed plates 16 symmetrically arranged on the inner wall of the dyeing box 2, and movable plates 17 that can be lifted and moved along the inner wall of the dyeing box 2 are respectively arranged on the two fixed plates 16. The movable cloth guide rollers 13 are sequentially arranged between the two movable plates 17 along the length direction of the two movable plates 17, and servo motors 18 for synchronously driving the two movable plates 17 to lift and lower are respectively provided on the two fixed plates 16.

[0029] like Figure 3 , 4 As shown, the fixed plate 16 includes a top plate 19 and two side plates 20 fixed to the top plate 19, a guide groove 21 slidably connected to the movable plate 17 is formed between the two side plates 20, an adjustment hole 22 is provided on the top plate 19, the adjustment hole 22 is a light hole, a threaded hole corresponding to the adjustment hole 22 is provided on the movable plate 17, a threaded rod 23 threadedly connected to the movable plate 17 through the threaded hole is provided in the adjustment hole 22, the servo motor 18 is rotatably connected to the threaded rod 23, and the servo motor 18 drives the rotation of the threaded rod 23 to drive the movable plate 17 to slide up and down in the guide groove 21. The side plate 20 in the fixed plate 16 is fixed to the side wall of the dyeing box 2 by screws 24. The movable plate 17 includes a plate body 25 extending along the length direction of the dyeing box 2, and each movable cloth guide roller 13 is rotatably connected to the plate body 25 through a fixing seat 26. A plurality of downwardly opening accommodating grooves 27 for accommodating each fixed cloth guide roller 12 when the movable plate 17 descends are provided on the plate body 25 between adjacent movable cloth guide rollers 13. Both ends of the fixed cloth guide roller 12 are rotatably connected to the inner wall of the dyeing box 2 through a fixing seat 28.

[0030] In the utility model, the fixed cloth guide rollers 12 and the staggered movable cloth guide rollers 13 are both non-powered rollers, and the feed rollers 4 and the discharge rollers 5 are both powered rollers. In the process of conveying the fabric 3 to be dyed, in order to reduce the resistance of the fabric 3 to be dyed during conveying and minimize the influence of tension on the grey cloth, the fixed cloth guide rollers 12 and the movable cloth guide rollers 13 play a supporting and guiding role in the process of dyeing, and use the gravity generated by the curvature of the grey cloth to provide friction force for advancement, driving the fixed cloth guide rollers 12 and the movable cloth guide rollers 13 to rotate, solving the problem that the traditional grey cloth needs to be pulled forward by a powered roller, resulting in excessive tension on the cloth body and deformation.

[0031] like Figure 5 As shown in (a)-(c), the curvature of the grey cloth gradually increases and the tension gradually decreases. When dyeing hemp-cotton knitted fabrics, the relaxation state and shape of the fabric 3 to be dyed between the fixed cloth guide roller 12 and the movable cloth guide roller 13 can be flexibly adjusted according to the different dimensional stability and density of the fabric grey cloth. During the continuous dyeing process, the tension on the cloth body is uniform, which greatly reduces the tension on the cloth body. At the same time, the optimal curvature of the grey cloth can be adjusted to make the cloth width absorb the dye solution at the same rate. When the curvature is larger, more area of ​​grey cloth can be dyed within the same dyeing time. Therefore, under the same dyeing effect conditions, the dyeing efficiency can be significantly improved.

[0032] The dyeing process of the utility model is as follows:

[0033] Before dyeing, the dye solution is poured into the dyeing chamber 1. During dyeing, the fabric 3 to be dyed is transported to the dyeing chamber 1 through the feed roller 4, and the worker pulls the fabric 3 to be dyed from both sides of the dyeing box 2, and pulls it horizontally from the horizontal adjustment area 14 between the fixed cloth guide roller 12 and the movable cloth guide roller 13 to the discharge roller 5, connects the winding device or soap washing device, turns on the servo motor 18 to drive the movable plate 17 to descend to the corresponding position, so that the fabric 3 to be dyed is wound between the fixed cloth guide roller 12 and the movable cloth guide roller 13 in sequence, and the fabric 3 to be dyed is in a relaxed state at this time, and the steam heating pipe 6, the feed roller 4 and the discharge roller 5 are started, and the fabric 3 to be dyed is gradually pushed forward in the dyeing chamber 1, so that the fabric 3 to be dyed is repeatedly immersed in the dye solution in a relaxed state, and the dye is gradually dyed until it is dyed into the desired color.

[0034] Embodiment 2:

[0035] The same parts of this embodiment as those of embodiment 1 are not described in detail. The difference between the present embodiment and embodiment 1 is that Figure 6 As shown, the movable plate 17 is placed in the guide groove 21 of the fixed plate 16, and the length of the movable plate 17 extending along the length direction of the dyeing box 2 is consistent with the length of the top plate 19 and the side plate 20 of the fixed plate 16. This structure can effectively improve the stability of the movable plate 17 when it is extended and retracted in the guide groove 21, and can provide a relatively stable supporting force for the cloth guide roller assembly 11 for the dyeing box 2 with a larger length or the dyeing of grey cloth with a larger unit area weight, and the specific size can be flexibly adjusted according to the dyeing equipment and dyeing and finishing requirements.

[0036] The utility model aims at the problem that hemp-cotton knitted fabric is easy to stretch and deform. By staggering the fixed cloth guide rollers 12 and the movable cloth guide rollers 13 up and down, the fabric is in a relatively relaxed state, and the dimensional stability and density (mass per unit area) of the fabric are easy to control. This good relaxation effect allows the fabric to be continuously transported during operation. As long as a small tension is applied to the fabric, the fabric can be run quickly, which solves the problem that the traditional fabric circulation speed is slow. By adjusting the height distance between the fixed cloth guide rollers 12 and the movable cloth guide rollers 13 by lifting and lowering, the grey cloth is more evenly distributed in the dye solution, avoiding the problem of uneven dyeing when the dye solution is heated at a fast rate, and also solves the defect of slow development of continuous dyeing technology for knitted fabrics.

[0037] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should fall within the protection scope of the present invention.

Claims

1. An impregnation dyeing device for hemp-cotton knitted fabrics, comprising an impregnation box with an impregnation chamber, a feed roller for conveying the fabric to be dyed into the impregnation box on one side of the impregnation box, and a discharge roller for discharging the impregnated fabric on the other side, a steam heating pipe for heating the dye solution is arranged in the impregnation chamber, and a drain pipe connected to the impregnation chamber is arranged at the bottom of the impregnation box, characterized in that: A plurality of cloth guide roller assemblies for unfolding and conveying the fabric to be dyed are arranged alternately in sequence in the dyeing chamber along the conveying direction of the fabric to be dyed, wherein the cloth guide roller assemblies include fixed cloth guide rollers arranged sequentially at the lower part of the fabric to be dyed along the conveying direction of the fabric to be dyed, and movable cloth guide rollers arranged at the upper part of the fabric to be dyed and alternately arranged with the fixed cloth guide rollers, a horizontal adjustment area for allowing the fabric to be dyed to pass through is formed between the fixed cloth guide rollers and the movable cloth guide rollers, and a control device for driving the movable cloth guide roller to rise and fall is arranged on the dyeing box.

2. The impregnation dyeing device for hemp-cotton knitted fabric according to claim 1 is characterized in that: The control device includes fixed plates symmetrically arranged on the inner wall of the dyeing box, and movable plates that can be lifted and moved along the inner wall of the dyeing box are respectively arranged on the two fixed plates. The movable cloth guide rollers are sequentially arranged between the two movable plates along the length direction of the two movable plates, and servo motors for synchronously driving the two movable plates to lift and lower are respectively arranged on the two fixed plates.

3. The impregnation dyeing device for hemp-cotton knitted fabric according to claim 2 is characterized in that: The fixed plate includes a top plate and two side plates fixed to the top plate, a guide groove slidably connected to the movable plate is formed between the two side plates, an adjustment hole is opened on the top plate, a threaded rod threadedly connected to the movable plate is arranged in the adjustment hole, and the servo motor is rotatably connected to the threaded rod.

4. The impregnation dyeing device for hemp-cotton knitted fabric according to claim 2 is characterized in that: The movable plate includes a plate body extending along the length direction of the dyeing box body, each movable cloth guide roller is rotatably connected to the plate body through a fixed seat, and a plurality of downwardly opening accommodating grooves for accommodating each fixed cloth guide roller when the movable plate is lowered are provided on the plate body between adjacent movable cloth guide rollers.

5. The impregnation dyeing device for hemp-cotton knitted fabric according to claim 1 is characterized in that: A mesh plate for filtering and blocking impurities in the dyeing process is laid at the bottom of the dyeing box, and the mesh plate is connected to the dyeing box through a support seat arranged at the bottom of the dyeing chamber.

6. The impregnation dyeing device for hemp-cotton knitted fabric according to claim 1 is characterized in that: A steam conveying circulation pipe connected with the steam heating pipe is arranged at the bottom of the dyeing box.

7. The impregnation dyeing device for hemp-cotton knitted fabric according to claim 2 is characterized in that: The fixing plate is fixed to the side wall of the dyeing box body by screws.

8. The impregnation dyeing device for hemp-cotton knitted fabric according to claim 1 is characterized in that: The two ends of the fixed cloth guide roller are rotatably connected to the inner wall of the dyeing box through a fixing seat.

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