Full-automatic dip dyeing device and process thereof

Abstract

The invention relates to the technical field of textile dip-dyeing, and discloses a full-automatic dip-dyeing device and a process thereof.The full-automatic dip-dyeing device comprises a constant-speed material pulling roller assembly, a speed adjusting motor, an equipment support, a tensioning wheel, a transmission chain and a dip-dyeing operation pool, and the two ends of the constant-speed material pulling roller assembly and the two ends of a variable-speed material discharging roller assembly are both connected with an equipment support body; the constant-speed material pulling roller assembly is arranged on the equipment support, the speed adjusting motor is fixed to the equipment support and connected with an input shaft of the constant-speed material pulling roller assembly, the equipment support is fixedly connected into the dip dyeing operation pool, and the variable-speed material discharging roller assembly is arranged on the equipment support. Alternate dip dyeing and lifting of cloth in dye liquor are achieved, up-and-down floating dip dyeing of the cloth is automatically controlled through a mechanical structure, cloth tension control is enhanced, the phenomena of uneven dyeing, non-thorough dyeing and the like are avoided, dynamic circulation of the dye liquor is promoted through up-and-down alternate lifting of the mechanical structure, the dye active period is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of textile dyeing, in particular to a full-automatic dyeing device and a process thereof. Background Art

[0002] With the upgrading of consumption and the growth of personalized demand, the modern textile industry has put forward higher requirements for fabric dyeing technology. The current fabric dyeing technology has the following core problems: High dependence on manual labor: The mainstream dyeing process requires workers to manually complete operations such as fabric feeding and taking out, which is labor-intensive and inefficient; dyeing uniformity is insufficient; In addition, there is a fabric dyeing process that immerses the fabric in the working liquid, quickly squeezes it through two rollers, and then dries or sets it. Due to the constant depth of the dyeing, the dyeing liquid cannot effectively penetrate into the fabric, and the dye is easy to precipitate and other defects, which can easily lead to color overlap or leakage of nylon and polyester fabrics; affecting the color expression and process stability; secondly, most of the dyeing mechanisms have more power sources, complex mechanical structures, and cumbersome electrical control, which is not conducive to operation and maintenance.

[0003] In view of the above problems, it is necessary to design a dyeing device and process for fabric processing to solve the above problems. The device automatically controls the fabric to float up and down through a mechanical structure, enhances the fabric tension control, and avoids uneven dyeing and opacity. The mechanical structure is alternately lifted up and down to promote the dynamic circulation of the dye liquid, and the dye liquid is not easy to precipitate, reducing maintenance costs. It can effectively improve the standardization of the dyeing process and the stability of product quality. It is controlled by a single motor and uses a power source to generate two motion modes in one system. It has a simple structure and low cost. Summary of the invention

[0004] 1. Technical issues to be resolved The purpose of the present invention is to overcome the deficiencies of the prior art and provide a fully automatic dyeing device and process thereof. The uniform speed pulling roller assembly can efficiently and stably complete the dyeing process. While pulling the material at a uniform speed, it can effectively remove most of the dyeing liquid, significantly improving the liquid recovery efficiency. The meshing transmission of the elliptical special-shaped gear can control the discharge roller assembly at a variable speed, and the variable acceleration and deceleration function is realized through the difference in gear profiles to adjust the discharge speed. By controlling the periodic difference in the pulling and discharge speeds of the uniform speed pulling roller and the variable speed discharge roller, the alternating immersion and lifting of the cloth in the dye liquid is realized; the mechanical structure automatically controls the floating and immersion of the cloth up and down, enhances the tension control of the cloth, avoids uneven dyeing, opacity and other phenomena, and promotes the dynamic circulation of the dye liquid through the mechanical structure. The active cycle of the dye is extended and the maintenance cost is reduced.

[0005] (II) Technical solution The technical solution of the present invention to solve the above technical problems is as follows: A fully automatic dyeing device comprises a uniform speed material pulling roller assembly, a speed regulating motor, an equipment support, a tensioning wheel, a transmission chain and a dyeing operation pool, wherein both ends of the uniform speed material pulling roller assembly and the variable speed material discharge roller assembly are connected to the equipment support body, the speed regulating motor is fixed on the equipment support and connected to the input shaft of the uniform speed material pulling roller assembly, the equipment support is fixedly connected in the dyeing operation pool, a variable speed material discharge roller assembly is arranged on the equipment support, the uniform speed material pulling roller assembly and the variable speed material discharge roller assembly are connected to the tensioning wheel through a transmission chain, a dyeing floating structure assembly is suspended on the inner side of the equipment support, and the dyeing floating structure assembly is located on the inner side of the dyeing operation pool.

[0006] Based on the above technical solution, the present invention can also be improved as follows.

[0007] Preferably, the uniform speed material pulling roller assembly includes a material pulling spur gear, a material pulling driven roller, a material pulling adjustment spring, a material pulling bearing seat, a material pulling active roller and a driving sprocket; both ends of the material pulling active roller are rotatably connected to the inner side of the equipment bracket, and two material pulling bearing seats are arranged on the equipment bracket, and the material pulling driven roller is rotatably connected between the two material pulling bearing seats, the output end of the speed regulating motor is fixedly connected to one end of the material pulling active roller, and a driving sprocket is arranged on the outer side of the other end of the material pulling active roller, and the driving sprocket is connected to the transmission chain, and mutually meshing material pulling spur gears are installed on the outer sides of the material pulling active roller and the material pulling driven roller, and the two material pulling bearing seats are installed with material pulling adjustment springs for flexibly adjusting the contact pressure between the material pulling active roller and the material pulling driven roller.

[0008] Preferably, the variable speed unloading roller assembly includes an unloading spur gear, an unloading adjusting spring, an unloading bearing seat, an unloading active roller, an elliptical special-shaped gear, a speed change unit bearing seat, a driven sprocket and an unloading driven roller. Two unloading bearing seats are installed on the equipment bracket, and the inner sides of the two unloading bearing seats are rotatably connected with the unloading active roller. The speed change unit bearing seat is installed on the equipment bracket, and the driven sprocket is installed on the speed change unit bearing seat, and the driven sprocket is connected with the transmission chain. The outer side of the unloading active roller and the speed change unit bearing seat are installed with elliptical special-shaped gears that mesh with each other. The inner side of the equipment bracket is rotatably connected with the unloading driven roller, and the outer side of the unloading active roller and the outer side of the unloading driven roller are installed with unloading spur gears that mesh with each other. The two unloading bearing seats are both installed with unloading adjusting springs that can flexibly adjust the contact pressure between the unloading active roller and the unloading driven roller.

[0009] Preferably, the dyeing floating structure assembly includes a supporting roller, a slider, a guide rail and a floating roller, four guide rails are installed on the inner side of the equipment bracket, two floating rollers are arranged on the inner side of the equipment bracket, the floating roller is slidably connected to the guide rail through the slider, the floating roller is rotatably connected to the slider, and the inner side of the equipment bracket is rotatably connected to two supporting rollers.

[0010] A fully automatic dip-dyeing process comprises the following steps: Step 1: Before operation, the linkage between the material unloading active roller in the variable speed unloading roller assembly and the material pulling driven roller in the uniform speed pulling roller assembly must be released. The specific operation is: lift the material unloading active roller and the material pulling driven roller to completely disengage the gears of the two rollers; Step 2: The fabric is guided through the variable speed unwinding roller assembly in sequence, passes through the supporting roller, bypasses the floating roller, and finally enters the uniform speed pulling roller assembly. The unwinding active roller is lowered, and the contact pressure between the unwinding active roller and the unwinding driven roller is controlled by the unwinding adjusting spring. The fabric is tightened so that the slider of the impregnation floating structure assembly is suspended in the middle position of the guide rail. Step 3: Lower the material pulling driven roller, and set the contact pressure between the material pulling active roller and the material pulling driven roller through the material pulling adjustment spring to ensure the stability of the uniform speed material pulling action; Step 4: Start the speed regulating motor, and the uniform speed pulling roller assembly keeps pulling the material at a constant speed; the variable speed unwinding roller assembly performs a cyclic unwinding action from acceleration to deceleration; the material between the two rollers undergoes a periodic deformation of "first stretching, then contracting, and then stretching" due to the speed difference; Step 5: When the discharge speed is greater than the pulling speed, the tension of the fabric increases, pulling the floating roller upward along the guide rail, and the dyeing depth decreases; when the discharge speed is less than the pulling speed, the floating roller pulls the fabric downward along the guide rail due to its own weight, and the dyeing depth increases; the periodic up and down reciprocating motion realizes uniform dyeing of the fabric, and at the same time stirs the dyeing liquid to prevent precipitation.

[0011] (III) Beneficial effects Compared with the prior art, the technical solution of this application has the following beneficial technical effects: 1. The present invention realizes the alternate immersion and lifting of the cloth in the dye solution by controlling the periodic difference between the pulling and unloading speeds of the uniform-speed pulling roller and the variable-speed unloading roller.

[0012] 2. The present invention automatically controls the fabric to float up and down and dye through a mechanical structure, thereby enhancing fabric tension control and avoiding uneven dyeing, opacity and the like.

[0013] 3. The present invention promotes the dynamic circulation of dye solution by lifting up and down alternately through the mechanical structure, prolongs the active period of the dye, and reduces maintenance costs.

[0014] 4. The present invention provides a mechanical roller pulling and extrusion function, and the device can efficiently and stably complete the dyeing process. While pulling the material at a uniform speed, it can effectively remove most of the dyeing liquid and significantly improve the liquid recovery efficiency.

[0015] 5. The present invention is controlled by a single motor, using one power source to generate two motion modes in one system, with a simple structure, easy control and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall front view structure of the fabric of the present invention when it shrinks; Figure 2 It is a schematic diagram of the overall front view structure of the fabric of the present invention when it is stretched; Figure 3 This is a schematic diagram of the structure of the uniform speed material pulling roller assembly of the present invention; Figure 4 It is a schematic diagram of the structure of the variable speed unwinding roller assembly of the present invention; Figure 5 It is a schematic diagram of the structure of the impregnation floating structure assembly of the present invention.

[0017] In the figure: 1. Uniform speed material pulling roller assembly; 101. Material pulling spur gear; 102. Material pulling driven roller; 103. Material pulling adjustment spring; 104. Material pulling bearing seat; 105. Material pulling active roller; 106. Active sprocket; 2. Speed ​​regulating motor; 3. Equipment bracket; 4. Tensioning wheel; 5. Variable speed material discharge roller assembly; 501. Material discharge spur gear; 502. Material discharge adjustment spring; 503. Material discharge bearing seat; 504. Material discharge active roller; 505. Elliptical special-shaped gear; 506. Variable speed unit bearing seat; 507. Driven sprocket; 508. Material discharge driven roller; 6. Transmission chain; 7. Dyeing operation pool; 8. Dyeing floating structure assembly; 801. Support roller; 802. Sliding block; 803. Guide rail; 804. Floating roller; 9. Cloth. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Reference Figure 1-5 A fully automatic dyeing device is provided, comprising a uniform speed pulling roller assembly 1, a speed regulating motor 2, an equipment support 3, a tensioning wheel 4, a transmission chain 6 and a dyeing operation pool 7, both ends of the uniform speed pulling roller assembly 1 and the variable speed discharge roller assembly 5 are connected to the main body of the equipment support 3, the speed regulating motor 2 is fixed on the equipment support 3 and connected to the input shaft of the uniform speed pulling roller assembly 1, the equipment support 3 is fixedly connected to the dyeing operation pool 7, a variable speed discharge roller assembly 5 is arranged on the equipment support 3, the uniform speed pulling roller assembly 1 and the variable speed discharge roller assembly 5 are connected to the tensioning wheel 4 through a transmission chain 6, a dyeing floating structure assembly 8 is suspended on the inner side of the equipment support 3, the dyeing floating structure assembly 8 is located on the inner side of the dyeing operation pool 7, and the speed regulating motor 2 is a servo motor.

[0020] The uniform speed material pulling roller assembly 1 includes a material pulling spur gear 101, a material pulling driven roller 102, a material pulling adjustment spring 103, a material pulling bearing seat 104, a material pulling active roller 105 and a driving sprocket 106; both ends of the material pulling active roller 105 are rotatably connected to the inner side of the equipment bracket 3, two material pulling bearing seats 104 are arranged on the equipment bracket 3, and the material pulling driven roller 102 is rotatably connected between the two material pulling bearing seats 104, the output end of the speed regulating motor 2 is fixedly connected to one end of the material pulling active roller 105, and the material pulling active roller 105 is A driving sprocket 106 is arranged on the outside of the other end, and the driving sprocket 106 is connected to the transmission chain 6. The outer sides of the pulling active roller 105 and the pulling driven roller 102 are installed with mutually meshing pulling spur gears 101, and the two pulling bearing seats 104 are installed with pulling adjusting springs 103 for flexibly adjusting the contact pressure between the pulling active roller 105 and the pulling driven roller 102. The dyeing process can be completed efficiently and stably, and most of the dyeing liquid can be effectively removed while pulling the material at a uniform speed, thereby significantly improving the liquid recovery efficiency.

[0021] The variable speed discharge roller assembly 5 includes a discharge spur gear 501, a discharge adjustment spring 502, a discharge bearing seat 503, a discharge active roller 504, an elliptical special-shaped gear 505, a speed change unit bearing seat 506, a driven sprocket 507 and a discharge driven roller 508. Two discharge bearing seats 503 are installed on the equipment bracket 3. The inner sides of the two discharge bearing seats 503 are rotatably connected with the discharge active roller 504. The equipment bracket 3 is installed with a speed change unit bearing seat 506. The speed change unit bearing seat 506 is installed with a driven sprocket 507. The driven sprocket 507 is connected to the transmission chain 6. The outer side of the discharge active roller 504 and the speed change unit bearing seat 50 6 is installed with mutually meshing elliptical special-shaped gears 505, the inner side of the equipment bracket 3 is rotatably connected with a material discharging driven roller 508, the outer side of the material discharging active roller 504 and the outer side of the material discharging driven roller 508 are installed with mutually meshing material discharging spur gears 501, and the two material discharging bearing seats 503 are installed with material discharging adjustment springs 502 that can flexibly adjust the contact pressure between the material discharging active roller 504 and the material discharging driven roller 508; the material discharging active roller 504 and the material discharging driven roller 508 form a pair of roller discharging structure, and the meshing transmission of the elliptical special-shaped gear 505 transmits power to the material discharging active roller 504, and realizes the variable acceleration and deceleration function through the difference in gear profile to adjust the material discharging speed; The pitch circle of the elliptical special-shaped gear 505 is an ellipse, so the transmission ratio of the gear will change as the gear rotates; specifically, the transmission ratio of the elliptical gear is variable, resulting in the speed and motion state of the output end also changing; The transmission ratio i of the elliptical gear can be expressed as: Among them, r1 and r2 are the instantaneous radii of the two gears at the contact point; For elliptical gears, the instantaneous radius r varies with the angle θ: Where a and b are the major and minor semi-axis of the ellipse respectively; Therefore, the transmission ratio i will also change with the angle θ; The pitch circles of the spur gears 101 and 501 are circles, so the transmission ratio of the gears is constant; specifically, the transmission ratio i of the spur gears is: Among them, R1 and R2 are the pitch circle radii of the two gears respectively. Since the rotation speeds of the upper and lower rollers need to be consistent, R2=R1=R, so the transmission ratio of the spur gear is constant, and the rotation speed and motion state of the output end are also constant.

[0022] The dyeing floating structure assembly 8 includes a supporting roller 801, a slider 802, a guide rail 803 and a floating roller 804. Four guide rails 803 are installed on the inner side of the equipment bracket 3. Two floating rollers 804 are arranged on the inner side of the equipment bracket 3. The floating rollers 804 are slidably connected to the guide rails 803 through the slider 802. The floating rollers 804 are rotatably connected to the slider 802. The inner side of the equipment bracket 3 is rotatably connected to two supporting rollers 801. The cloth 9 passes through the variable speed unwinding roller assembly 5 in sequence, passes through the supporting roller 801, and then bypasses the floating roller 804, and finally enters the uniform speed pulling roller assembly 1. A pair of supporting rollers 801 and floating rollers 804 are arranged to form a frame-type external expansion structure. Ensure the stability of the dyeing path of the cloth 9; the periodic difference in the pulling and discharging speeds of the uniform-speed pulling roller 1 and the variable-speed discharging roller 5 causes the cloth 9 to undergo a cyclic deformation of "first stretching, then contracting, and then stretching again". The deformation of the cloth 9 pulls the floating roller 804 to reciprocate up and down along the guide rail 803 to achieve alternating immersion and lifting of the cloth in the dye solution; the up and down floating and dyeing of the cloth is automatically controlled by the mechanical structure, the tension control of the cloth is enhanced, and uneven dyeing and opacity are avoided. The mechanical structure is alternately lifted up and down to promote the dynamic circulation of the dye solution, extend the active period of the dye, and reduce the maintenance cost. It is controlled by a single motor 2 and uses one power source to generate two motion modes in one system. The structure is simple, easy to control, and the cost is low.

[0023] By controlling the adjustment spring 103 in the uniform speed pulling roller assembly 1, the contact pressure between the active pulling roller 105 and the driven pulling roller 102 can be flexibly adjusted. Through the mechanical pulling and squeezing action of the rollers, the device can efficiently and stably complete the dyeing process. While pulling the material at a uniform speed, it can effectively remove most of the dyeing liquid, significantly improving the liquid recovery efficiency.

[0024] A fully automatic dip-dyeing process comprises the following steps: Step 1: Before operation, the linkage state between the material discharge active roller 504 in the variable speed material discharge roller assembly 5 and the material pulling driven roller 102 in the uniform speed material pulling roller assembly 1 needs to be released. The specific operation is: lift the material discharge active roller 504 and the material pulling driven roller 102 to completely disengage the gears of the two rollers; Step 2: The cloth 9 is guided through the variable speed unloading roller assembly 5 in sequence, passes through the supporting roller 801, bypasses the floating roller 804, and finally enters the uniform speed pulling roller assembly 1, and the unloading active roller 504 is lowered, and the contact pressure between the unloading active roller 504 and the unloading driven roller 508 is controlled by the unloading adjusting spring 502, and the cloth 9 is tightened so that the slider 802 of the impregnation floating structure assembly 8 is suspended in the middle position of the guide rail 803; Step 3: lower the material pulling driven roller 102, and set the contact pressure between the material pulling active roller 105 and the material pulling driven roller 102 through the material pulling adjustment spring 103 to ensure the stability of the uniform speed material pulling action; Step 4: Start the speed regulating motor 2, and the uniform speed pulling roller assembly 1 keeps pulling the material at a constant speed; the variable speed unwinding roller assembly 5 performs a cyclic unwinding action from acceleration to deceleration; the material 9 between the two rollers undergoes a periodic deformation of "first stretching, then contracting, and then stretching" due to the speed difference; Step 5: When the discharge speed is greater than the pulling speed, the tension of the cloth 9 increases, pulling the floating roller 804 to move upward along the guide rail 803, and the dyeing depth decreases; when the discharge speed is less than the pulling speed, the floating roller 804 pulls the cloth 9 downward along the guide rail 803 due to its own weight, and the dyeing depth increases; the periodic up and down reciprocating motion realizes uniform dyeing of the cloth 9, and at the same time stirs the dyeing liquid to prevent precipitation.

[0025] It should be noted that the above control processes are all controlled by a controller, and the specific control logic is common knowledge known to those skilled in the art, so it will not be described in detail. It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fully automatic dyeing device, comprising a uniform speed material pulling roller assembly (1), a speed regulating motor (2), an equipment support (3), a tensioning wheel (4), a transmission chain (6) and a dyeing operation pool (7), wherein both ends of the uniform speed material pulling roller assembly (1) and the variable speed material unwinding roller assembly (5) are connected to the main body of the equipment support (3), the speed regulating motor (2) is fixed on the equipment support (3) and connected to the input shaft of the uniform speed material pulling roller assembly (1), and the equipment support (3) is fixedly connected to the dyeing operation pool (7), characterized in that: A variable speed discharge roller assembly (5) is arranged on the equipment support (3); the uniform speed pulling roller assembly (1) and the variable speed discharge roller assembly (5) are connected via a transmission chain (6) and a tension wheel (4); a dyeing floating structure assembly (8) is suspended on the inner side of the equipment support (3); and the dyeing floating structure assembly (8) is located on the inner side of the dyeing operation pool (7).

2. A fully automatic dyeing device according to claim 1, characterized in that: The uniform speed material pulling roller assembly (1) comprises a material pulling spur gear (101), a material pulling driven roller (102), a material pulling adjustment spring (103), a material pulling bearing seat (104), a material pulling active roller (105) and a driving sprocket (106); both ends of the material pulling active roller (105) are rotatably connected to the inner side of the equipment bracket (3), two material pulling bearing seats (104) are arranged on the equipment bracket (3), a material pulling driven roller (102) is rotatably connected between the two material pulling bearing seats (104), and the output end of the speed regulating motor (2) is connected to the One end of the material pulling active roller (105) is fixedly connected, and a driving sprocket (106) is arranged on the outer side of the other end of the material pulling active roller (105), and the driving sprocket (106) is connected to the transmission chain (6). The outer sides of the material pulling active roller (105) and the material pulling driven roller (102) are installed with mutually meshing material pulling spur gears (101), and the two material pulling bearing seats (104) are installed with material pulling adjustment springs (103) for flexibly adjusting the contact pressure between the material pulling active roller (105) and the material pulling driven roller (102).

3. A fully automatic dyeing device according to claim 1, characterized in that: The variable speed discharge roller assembly (5) comprises a discharge spur gear (501), a discharge adjustment spring (502), a discharge bearing seat (503), a discharge active roller (504), an elliptical special-shaped gear (505), a variable speed unit bearing seat (506), a driven sprocket (507) and a discharge driven roller (508). Two discharge bearing seats (503) are mounted on the equipment support (3). The inner sides of the two discharge bearing seats (503) are rotatably connected to the discharge active roller (504). The speed change unit bearing seat (506) is mounted on the equipment support (3). The driven sprocket (507) is mounted on the speed change unit bearing seat (506). 7), a driven sprocket (507) is connected to a transmission chain (6), mutually meshing elliptical special-shaped gears (505) are installed on the outer side of the material unloading active roller (504) and the bearing seat (506) of the speed change unit, a material unloading driven roller (508) is rotatably connected to the inner side of the equipment bracket (3), mutually meshing material unloading spur gears (501) are installed on the outer side of the material unloading active roller (504) and the outer side of the material unloading driven roller (508), and a material unloading adjustment spring (502) that can flexibly adjust the contact pressure between the material unloading active roller (504) and the material unloading driven roller (508) is installed on both of the two material unloading bearing seats (503).

4. The fully automatic dyeing device according to claim 1, characterized in that: The dyeing floating structure assembly (8) comprises a supporting roller (801), a slider (802), a guide rail (803) and a floating roller (804); four guide rails (803) are installed on the inner side of the equipment bracket (3); two floating rollers (804) are arranged on the inner side of the equipment bracket (3); the floating rollers (804) are slidably connected to the guide rails (803) via the slider (802); the floating rollers (804) are rotatably connected to the slider (802); and the inner side of the equipment bracket (3) is rotatably connected to the two supporting rollers (801).

5. A process applied to the fully automatic dyeing device according to any one of claims 1 to 4, characterized in that: The following steps are involved: ‌ Step 1: Before operation, the linkage between the material discharge active roller (504) in the variable speed material discharge roller assembly (5) and the material pulling driven roller (102) in the uniform speed material pulling roller assembly (1) must be released. The specific operation is: lift the material discharge active roller (504) and the material pulling driven roller (102) to completely disengage the gears of the two rollers; Step 2: The cloth (9) is guided through the variable speed unwinding roller assembly (5) in sequence, passes through the supporting roller (801), bypasses the floating roller (804), and finally enters the uniform speed pulling roller assembly (1), and the unwinding active roller (504) is lowered, and the contact pressure between the unwinding active roller (504) and the unwinding driven roller (508) is controlled by the unwinding regulating spring (502), and the cloth (9) is tightened so that the slider (802) of the impregnation floating structure assembly (8) is suspended in the middle position of the guide rail (803); Step 3: lower the material pulling driven roller (102), and set the contact pressure between the material pulling active roller (105) and the material pulling driven roller (102) by means of the material pulling adjustment spring (103) to ensure the stability of the uniform speed material pulling action; Step 4: Start the speed regulating motor (2), the uniform speed pulling roller assembly (1) keeps pulling the material at a constant speed; the variable speed unwinding roller assembly (5) performs a cyclic unwinding action from acceleration to deceleration; the material (9) between the two rollers undergoes a periodic deformation of "first stretching, then contracting, and then stretching" due to the speed difference; Step 5: When the material discharge speed is greater than the material pulling speed, the tension of the cloth (9) increases, pulling the floating roller (804) upward along the guide rail (803), and the dyeing depth decreases; when the material discharge speed is less than the material pulling speed, the floating roller (804) pulls the cloth (9) downward along the guide rail (803) due to its own weight, and the dyeing depth increases; the periodic up and down reciprocating motion realizes uniform dyeing of the cloth (9), and at the same time stirs the dyeing liquid to prevent precipitation.

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