A pre-shrinking machine and dyeing process for knitted stretch fabric dyeing process

Abstract

The present application belongs to the technical field of fabric dyeing, and particularly relates to a pre-shrinking machine and dyeing process for knitted stretch fabric dyeing process, comprising a frame, on which an overfeed roller, a flattening roller, a pressure roller and a cloth outlet roller are arranged in sequence, a rubber blanket tension roller is arranged below the pressure roller, a traction motor is connected to the cloth outlet roller, an overfeed motor is connected to the overfeed roller, a weft skew adjustment device is arranged between the overfeed roller and the flattening roller, and the weft skew adjustment device comprises an infrared edge detection mechanism, a controller and two weft skew adjustment parts, the infrared edge detection mechanism is used to detect the edge position of the fabric at both ends of the pressure roller to judge the weft skew situation; the controller is connected to the weft skew adjustment part, and after receiving the electrical signal of the infrared edge detection mechanism, the weft skew adjustment part is controlled to change the input speed of the corresponding fabric edge, and a humidifying device is arranged on the frame, and the humidifying device is located on the side of the pressure roller facing away from the cloth outlet roller. The present application has the advantages of reducing the weft skew during pre-shrinking, thereby ensuring the pre-shrinking and dyeing effects.

Description

Technical Field

[0001] The present application relates to the technical field of fabric dyeing, and in particular to a preshrinking machine and a dyeing process for knitted stretch fabric dyeing. Background Art

[0002] Knitted stretch fabric is a fabric that has elastic yarns such as spandex added during knitting and has good elasticity.

[0003] The Chinese utility model patent with the authorization announcement number CN204825370U discloses a pre-shrinking machine for fabrics, including a cloth feed roller and a cloth outlet roller symmetrically arranged on the left and right, a pressure roller is arranged between the cloth feed roller and the cloth outlet roller, a rubber blanket tension roller is arranged directly below the pressure roller, the outer edges of the cloth feed roller, the cloth outlet roller and the rubber blanket tension roller are sleeved with rubber blankets, the pressure roller presses down the rubber blanket to make it concave, the fabric to be pre-shrinked enters between the cloth feed roller and the pressure roller, and is sent out between the cloth outlet roller and the pressure roller, the cloth feed roller and the cloth outlet roller are respectively mounted on a fixed rod with adjustable length, and the pressure roller and the rubber blanket tension roller are both heating rollers. The utility model installs the cloth feed roller and the cloth outlet roller on a fixed rod with adjustable length, respectively, and the distance between the cloth feed roller and the cloth outlet roller is adjustable, which is used to adjust the fabric tightening pressure, increase the use range of the pre-shrinking machine for fabrics, and the pressure roller and the rubber blanket tension roller are both heating rollers, which heat the fabric during extrusion to improve the pre-shrinking effect, and has good application prospects.

[0004] However, the weft skew phenomenon may occur when the fabric is being transported but has not yet entered the pre-shrinking process. The pre-shrinking effect of the fabric with weft skew will be unsatisfactory after pre-shrinking, which will also affect the subsequent dyeing quality and product quality. Summary of the invention

[0005] In order to reduce the possibility of weft skewness in the stretch fabric during pre-shrinkage, thereby improving the quality of the fabric after pre-shrinkage and even dyeing, the present application provides a pre-shrinking machine for a knitted stretch fabric dyeing process.

[0006] The present application provides a pre-shrinking machine for a knitted stretch fabric dyeing process, which adopts the following technical solution:

[0007] A preshrinking machine for a knitted stretch fabric dyeing process comprises a frame, on which an overfeed roller, a flattening roller, a pressure roller and a cloth discharge roller are sequentially arranged, a rubber blanket tension roller is arranged below the pressure roller, the cloth discharge roller is connected with a traction motor, the overfeed roller is connected with an overfeed motor, the pressure roller and the rubber blanket tension roller are both heating rollers, a weft skew adjustment device is arranged between the overfeed roller and the flattening roller, the weft skew adjustment device comprises an infrared edge detection mechanism, a controller and two weft skew adjustment members, the infrared edge detection mechanism is arranged at both ends of the pressure roller and is electrically connected to the controller, so as to detect the cloth edge position at both ends of the pressure roller and thus judge the weft skew situation; the controller is connected to the weft skew adjustment member, and after receiving the electrical signal of the infrared edge detection mechanism, the weft skew adjustment member is controlled to change the input speed of the corresponding fabric edge, and a humidifying device is arranged on the frame, and the humidifying device is located on the side of the pressure roller facing away from the cloth discharge roller.

[0008] By adopting the above technical scheme, the cloth roll is placed on the frame, and then passes around the overfeed roller, the flattening roller, the pressure roller and the cloth outlet roller, and is finally reeled or directly enters the setting machine for setting; the overfeed roller drives the cloth to unwind at an overspeed, thereby overfeeding the cloth, the flattening roller is used to flatten the cloth in the width direction, and the cloth outlet roller provides the main power for cloth transportation. After the cloth enters the pressure roller, it is pre-shrinked after the action of the rubber blanket tension roller and the pressure roller, and then the cloth is discharged through the cloth outlet roller; the edge detection is carried out by the infrared edge detection mechanism, and then the controller controls the weft skew adjustment member to adjust the cloth edge transmission speed of the cloth, thereby reducing and eliminating the weft skew and ensuring the pre-shrinkage effect.

[0009] Optionally, the weft adjustment component includes a driving wheel, a variable speed motor for driving the driving wheel to rotate, and a resistance block arranged on the outer edge of the driving wheel and distributed circumferentially along the driving wheel, wherein the surface of the resistance block facing away from the axis of the driving wheel is arranged as an arc-shaped resistance surface, and the arc-shaped resistance surface is used to contact the surface of the fabric to drive the edge of the fabric to be transported through friction.

[0010] By adopting the above technical scheme, the driving wheel is driven to rotate by the variable speed motor. When rotating, the arc-shaped contact surface at the edge of the contact block contacts the cloth, and then drives the cloth to be transported. When the speed of the arc-shaped contact surface is faster than the cloth edge, it can drive the cloth edge on the side to accelerate the transportation. When the speed of the arc-shaped contact surface is slower than the cloth edge, it can drive the cloth edge on the side to decelerate the transportation. When the speeds of the two cloth edges are inconsistent, the weft skew of the cloth is reduced or even eliminated. Through cloth edge detection, it can be known which side of the cloth is too fast, so that the variable speed motor on that side can be slowed down by the controller or the weft skew adjustment member can be controlled to adjust the speed of the arc-shaped contact surface, thereby reducing the cloth edge speed and alleviating the weft skew.

[0011] Optionally, the resistance block includes a column base and multiple movable plates, the column base is arranged on the outer edge of the driving wheel and is coaxial with the driving wheel, the movable plate is rotatably installed on the outer side wall of the column base and distributed along the circumference of the driving wheel, the arc-shaped resistance surface is arranged on the surface of the movable plate facing away from the axis of the driving wheel, the rotating shaft between the column base and the movable plate is arranged along the cloth conveying direction so that the rotating plane is the vertical plane where the cloth width is located, the rotating shaft is located at one end of the column base close to the center of the cloth surface, and the frame is provided with a speed change component for adjusting the angle between the column base and the movable plate to change the linear speed of the arc-shaped resistance surface.

[0012] By adopting the above technical solution, when it is necessary to adjust the speed of the arc-shaped contact surface, the movable plate is driven to rotate on the column base through the speed change member, so that the radius of the arc-shaped contact surface relative to the driving wheel changes, and the linear speed of the arc-shaped contact surface changes when the speed of the speed change wheel remains unchanged; in addition, when the radius increases, the arc-shaped contact surface is more tightly pressed against the cloth, and the speed increases, so that the arc-shaped contact surface has a better driving effect on the cloth, thereby accelerating the transportation of the cloth edge here; on the contrary, the arc-shaped contact surface tends to relax the pressure on the cloth, and the linear speed decreases, thereby reducing the driving and conveying effect, and the adjustment effect can be better.

[0013] Optionally, the speed changing component includes a driving guide cylinder and an electric cylinder for driving the driving guide plate to be inserted between the column base and the movable plate along the width direction of the cloth surface, the electric cylinder is arranged on the frame, the push rod of the electric cylinder is coaxially arranged with the driving wheel, the driving guide cylinder is sleeved outside the column base and is located between the angle between the column base and the movable plate, the inner wall of the driving guide cylinder is fitted with the outer wall of the column base to form sliding, and the driving guide cylinder is connected to the push rod of the electric cylinder.

[0014] By adopting the above technical solution, the push rod of the electric cylinder is extended and retracted to drive the guide cylinder to move in the axial direction, thereby causing the movable plate to rotate. The structure is simple and the driving effect is good.

[0015] Optionally, the speed change component includes a driving protrusion and a sliding block, the driving protrusion is arranged on the outer wall of the column base, and the vertical side wall of the driving guide cylinder facing the center of the cloth is provided with a sliding groove along the radial direction of the driving wheel and penetrating the inner and outer walls of the driving guide cylinder, and multiple sliding grooves are arranged along the circumference of the driving guide cylinder, and the sliding block is slidably arranged in the sliding groove, and the side wall of the driving guide cylinder facing the center of the cloth is provided with an annular connecting groove, and the connecting groove penetrates the inner wall of the driving guide cylinder in the axial direction of the driving guide cylinder, and the connecting groove is used for allowing the driving protrusion to rotate smoothly when the driving wheel rotates, and the side of the driving protrusion facing away from the center of the cloth is set as a conical guide surface, and the inclination direction of the conical guide surface is that the radius gradually increases from the driving guide cylinder to the driving protrusion.

[0016] By adopting the above technical solution, when the driving guide cylinder moves toward the center of the cloth, the driving protrusion contacts the sliding block, and the driving protrusion enters from the bottom of the sliding block and drives the sliding block to move outward along the sliding groove. The sliding block and the movable plate contact the surface of the column base and drive the movable plate to rotate. Under the premise of the same moving stroke of the driving guide cylinder, the movable plate can be driven to rotate a larger angle, so that when the adjustment amount remains unchanged, the required moving stroke is smaller, and the mechanism can also be designed to be more compact.

[0017] Optionally, the humidifying device includes a water supply pipe and humidifying nozzles distributed along the length direction of the water supply pipe, the water supply pipe is connected to a water supply source, the water supply pipe is arranged along the width direction of the fabric and is located above the weft adjustment device, and the humidifying nozzles are arranged toward the surface of the fabric.

[0018] By adopting the above technical solution, humidification is performed through a humidifying nozzle, the structure is simple, and the humidification effect is good.

[0019] Optionally, the humidifying nozzle includes a cloth edge nozzle for humidifying the cloth edge and a cloth surface nozzle for humidifying the cloth between the cloth edges. The cloth edge nozzles are located at both ends of a water supply pipe and are rotatably connected to the water supply pipe. The rotating shaft of the rotatable connection is arranged along the length direction of the cloth. The cloth edge nozzles are connected to the push rod of the electric cylinder so that when the push rod of the electric cylinder drives the driving guide cylinder to move toward the center of the cloth surface, the cloth edge nozzles are driven to rotate toward the outside of the cloth, thereby reducing the humidification efficiency.

[0020] By adopting the above technical solution, when the movement of the cloth edge is accelerated, the cloth edge tends to be lifted up and opened, and is easily humidified. The degree of humidification needs to be reduced. By driving the cloth edge nozzle to rotate outward, the humidification effect of the cloth edge nozzle on the cloth edge can be reduced, thereby adapting to working conditions.

[0021] Optionally, a reset member is provided between the column base and the movable plate to drive the movable plate to rotate toward the column base.

[0022] By adopting the above technical solution, when the movable plate rotates downward, the movable plate will droop, and when it rotates upward, the movable plate will rotate toward the column base and collide. The state of the movable plate can be maintained by the reset part to avoid continuous collision during rotation, extend the service life, and reduce the noise.

[0023] Optionally, the reset member includes a reset torsion spring arranged between the column base and the movable plate.

[0024] By adopting the above technical solution, the movable plate is driven to rotate and reset by the reset torsion spring, which has a simple structure and good effect.

[0025] The second object of the present invention is to provide a knitted stretch fabric dyeing process, comprising: S01, unwinding the grey fabric; S02, pre-shrinking the grey fabric unwound in S01 by means of a pre-shrinking machine according to any one of claims 1 to 9; S03, pre-setting the fabric pre-set in S02; S04, dyeing the fabric pre-set in S03; S05, washing the fabric dyed in S04; S06, opening the fabric washed in S05, drying and setting the fabric.

[0026] By adopting the above technical solution and using a shrinking machine to shrink the cloth, the influence of weft skew on the shrinking effect can be reduced, thereby improving the shrinking quality.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The push rod of the electric cylinder is extended and retracted to finally drive the movable plate to rotate, thereby changing the linear speed of the arc-shaped contact surface, and then changing the conveying speed of the fabric after it contacts the arc-shaped contact surface, thereby adjusting the weft skew degree of the fabric before pre-shrinking, slowing down or even eliminating the weft skew phenomenon, and thus ensuring the pre-shrinking and dyeing effects;

[0029] 2. The speed of the cloth edge can also be adjusted by changing the rotation of the variable speed motor, thereby reducing the weft skew;

[0030] 3. When the movable plate rotates, the height of the arc-shaped contact surface rises, which can tighten the fabric and increase the friction between the arc-shaped contact surface and the fabric, thereby enhancing the driving effect. On the other hand, it can increase the linear speed of the arc-shaped contact surface, further improving the driving effect.

[0031] Reference numerals

[0032] Figure 1 It is a schematic diagram of the structure of the pre-shrinking machine of Example 1 of the present application.

[0033] Figure 2 It is a cross-sectional view of the preshrinking machine of Example 1 of the present application.

[0034] Figure 3 It is a structural schematic diagram of the weft skew adjustment device and the humidification device of the preshrinking machine in Example 1 of the present application.

[0035] Figure 4 It is a schematic structural diagram of the weft adjustment member of Example 1 of the present application.

[0036] Figure 5 It is a cross-sectional view of the weft adjustment member of Example 1 of the present application.

[0037] Figure 6 It is an exploded view of the weft adjustment member of Example 1 of the present application.

[0038] Description of reference numerals: 1. frame; 11. overfeed roller; 111. overfeed motor; 12. flattening roller; 13. pressure roller; 14. cloth outlet roller; 141. traction motor; 15. rubber blanket tension roller; 16. cloth feed roller; 17. cloth lower roller; 18. rubber blanket; 2. humidifying device; 21. water supply pipe; 22. humidifying nozzle; 221. cloth edge nozzle; 222. cloth surface nozzle; 23. driving rod; 3. Weft oblique adjustment device; 4. Infrared edge detection mechanism; 6. Weft oblique adjustment member; 61. Driving wheel; 62. Speed-changing motor; 63. Resistance block; 631. Column base; 632. Movable plate; 6321. Arc-shaped resistance surface; 64. Reset member; 7. Speed-changing member; 71. Driving guide cylinder; 772. Electric cylinder; 73. Driving convex block; 731. Conical guide surface; 74. Sliding block; 75. Slide; 76. Connecting groove. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-6 This application is described in further detail.

[0040] Embodiment 1 of the present application discloses a pre-shrinking machine for a knitted stretch fabric dyeing process, such as Figure 1 As shown, it comprises a frame 1, on which an overfeeding roller 11, a flattening roller 12, a humidifying device 2, a pressure roller 13 and a cloth discharging roller 14 are sequentially arranged.

[0041] like Figure 1 and Figure 2 As shown, a rubber blanket tension roller 15 is arranged below the pressure roller 13, and a cloth feed roller 16 and a lower cloth roller 17 are arranged on both sides of the pressure roller 13, respectively. The cloth feed roller 16 is located between the flattening roller 12 and the pressure roller 13, and the lower cloth roller 17 is located between the pressure roller 13 and the cloth outlet roller 14. The rubber blanket tension roller 15, the pressure roller 13, the cloth feed roller 16 and the lower cloth roller 17 are connected through a rubber blanket 18, and the rubber blanket tension roller 15 can be adjusted and moved on the frame 1, and the tension of the rubber blanket 18 can be changed by adjusting and moving. The pressure roller 13 and the rubber blanket tension roller 15 are both heating rollers.

[0042] The cloth discharging roller 14 is connected to a traction motor 141 installed on the frame 1 , and the traction motor 141 drives the cloth discharging roller 14 to rotate to pull the cloth, thereby driving the cloth to be transported.

[0043] The overfeeding roller 11 is connected to an overfeeding motor 111 installed on the frame 1, and the overfeeding motor 111 drives the overfeeding roller 11 to rotate, thereby driving the overfeeding conveyance of the cloth.

[0044] A weft skew adjustment device 3 is provided between the overfeed roller 11 and the flattening roller 12 . The weft skew adjustment device 3 includes an infrared edge detection mechanism 4 , a controller and two weft skew adjustment members 6 .

[0045] The infrared edge detection mechanism 4 is a commonly used infrared edge detection mechanism 4 in the art, and will not be described in detail here.

[0046] Two weft bias adjusting members 6 are located on both sides of the cloth, corresponding to one of the cloth edges respectively.

[0047] like Figure 3 and Figure 4 As shown, the weft adjustment member 6 includes a driving wheel 61 , a variable speed motor 62 for driving the driving wheel 61 to rotate, and a resistance block 63 arranged on the outer edge of the driving wheel 61 . The resistance block 63 includes a column base 631 and a plurality of movable plates 632 .

[0048] like Figure 3 and Figure 4 As shown, the variable speed motor 62 is installed on the frame 1, the rotating shaft of the driving wheel 61 is set along the width direction of the cloth, the driving wheel 61 is connected to the variable speed motor 62, the column base 631 is installed on the outer edge of the driving wheel 61 and is coaxial with the driving wheel 61, and the movable plate 632 is rotatably installed on the outer side wall of the column base 631 and is distributed circumferentially along the driving wheel 61.

[0049] like Figure 5 and Figure 6 As shown, an arc-shaped contact surface 6321 is provided on the surface of the movable plate 632 facing away from the axis of the driving wheel 61. The arc-shaped cross section of the arc-shaped contact surface 6321 is parallel to the driving wheel 61 and is used to press against the bottom surface of the cloth to drive the cloth to be transported.

[0050] The rotation axis between the column base 631 and the movable plate 632 is arranged along the cloth conveying direction so that the rotation plane is a vertical plane where the cloth width is located.

[0051] A reset member 64 is disposed between the column base 631 and the movable plate 632 to drive the movable plate 632 to rotate toward the column base 631 . The reset member 64 includes a reset torsion spring disposed between the column base 631 and the movable plate 632 .

[0052] The rotating shaft is located at one end of the column base 631 close to the center of the cloth surface. The frame 1 is provided with a speed change member 7 for adjusting the angle between the column base 631 and the movable plate 632 so as to change the linear speed of the arc-shaped contact surface 6321 .

[0053] The speed changing member 7 comprises a driving guide cylinder 71, an electric cylinder 772, a driving protrusion 73 and a sliding block 74. The electric cylinder 772 is used to drive the driving guide plate to be inserted between the column base 631 and the movable plate 632 along the width direction of the cloth surface.

[0054] The electric cylinder 772 is installed on the frame 1, and the push rod of the electric cylinder 772 is coaxially arranged with the driving wheel 61. The driving guide cylinder 71 is sleeved outside the column base 631 and is located between the angle between the column base 631 and the movable plate 632. The inner wall of the driving guide cylinder 71 fits with the outer wall of the column base 631 to form a sliding movement, and the driving guide cylinder 71 is connected to the push rod of the electric cylinder 772.

[0055] The driving protrusion 73 is arranged on the outer wall of the column base 631, and the vertical side wall of the driving guide cylinder 71 facing the center of the cloth is provided with a sliding groove 75 along the radial direction of the driving wheel 61 and penetrating the inner and outer walls of the driving guide cylinder 71. There are multiple sliding grooves 75 arranged along the circumference of the driving guide cylinder 71, and the sliding block 74 is slidably arranged in the sliding groove 75. The side wall of the driving guide cylinder 71 facing the center of the cloth is provided with an annular connecting groove 76, and the connecting groove 76 penetrates the inner wall of the driving guide cylinder 71 in the axial direction of the driving guide cylinder 71. The connecting groove 76 is used for allowing the driving protrusion 73 to rotate smoothly when the driving wheel 61 rotates. The side of the driving protrusion 73 facing away from the center of the cloth is provided with a conical guide surface 731, and the inclination direction of the conical guide surface 731 is that the radius gradually increases from the driving guide cylinder 71 to the driving protrusion 73.

[0056] like Figure 2 and Figure 3 As shown, the infrared edge detection mechanism 4 is arranged at both ends of the pressure roller 13 and is electrically connected to the controller, so as to detect the cloth edge position at both ends of the pressure roller 13 and judge the weft skew. The controller is connected to the weft skew adjustment member 6, and controls the push rod movement of the electric cylinder 772 after receiving the electrical signal of the infrared edge detection mechanism 4, thereby driving the driving guide cylinder 71 to move, thereby changing the rotation of the movable plate 632, thereby changing the linear speed of the arc-shaped contact surface 6321, and then changing the conveying speed of the cloth edge, alleviating and eliminating the weft skew.

[0057] like Figure 3 As shown, the humidifying device 2 is located on the side of the pressure roller 13 facing away from the cloth outlet roller 14 and above the cloth. The humidifying device 2 includes a water supply pipe 21 and humidifying nozzles 22 distributed along the length direction of the water supply pipe 21. The water supply pipe 21 is horizontally arranged along the width direction of the cloth. The water supply pipe 21 is connected to a water supply source. The water supply pipe 21 is located above the driving wheel 61, and the humidifying nozzles 22 are arranged toward the surface of the cloth.

[0058] Among them, the humidifying nozzle 22 includes a cloth edge nozzle 221 for humidifying the cloth edge and a cloth surface nozzle 222 for humidifying the cloth between the cloth edges. The cloth edge nozzle 221 is located at both ends of the water supply pipe 21 and is rotatably connected to the water supply pipe 21. The rotating shaft of the rotatable connection is arranged along the length direction of the cloth. A driving rod 23 is provided on the cloth edge nozzle 221. The driving rod 23 is located on the side of the hinge point between the cloth edge nozzle 221 and the water supply pipe 21 that is away from the cloth edge nozzle 221. The driving rod 23 is connected to the push rod of the electric cylinder 772 so that when the push rod of the electric cylinder 772 drives the driving guide cylinder 71 to move toward the center of the cloth surface, it drives the cloth edge nozzle 221 to rotate toward the outside of the cloth, thereby reducing the humidification efficiency.

[0059] Embodiment 1 A pre-shrinking machine is used as follows:

[0060] The cloth passes over the overfeed roller 11, under the flattening roller 12, over the driving wheel 61, over the cloth feed roller 16, under the pressure roller 13, over the lower cloth roller 17, and under the cloth outlet roller 14. When the cloth enters between the rubber blanket 18 and the pressure roller 13, the surface of the cloth is pre-shrunk by the rubber blanket tension roller 15 and the pressure roller 13, and the cloth is output through the lower cloth roller 17 and the cloth outlet roller 14.

[0061] When the infrared edge detection mechanism 4 detects the position of the cloth edge, it sends an electrical signal to the controller. The controller controls the push rod of one of the electric cylinders 772 to extend and the push rod of the other electric cylinder 772 to retract or remain stationary according to the actual situation of the left and right sides of the cloth edge. At this time, the extended push rod pushes the driving guide cylinder 71 to move toward the driving protrusion 73, and the driving protrusion 73 gradually extends into the sliding groove 75 and inserts under the sliding block 74, driving the sliding block 74 to move along the sliding groove 75 in the direction away from the axis of the driving guide cylinder 71. The sliding block 74 contacts the bottom surface of the movable plate 632, thereby driving the movable plate 632 to rotate, and the angle between the movable plate 632 and the driving guide cylinder 71 increases, and the arc-shaped contact surface 6321 contacts the bottom surface of the cloth, driving the cloth edge to be transported faster, while lifting the cloth edge upward to a certain extent; at the same time, due to the extension of the push rod, the driving rod 23 connected to the push rod is pushed to rotate, driving the cloth edge nozzle 221 to rotate, so that the cloth edge nozzle 221 rotates outward, and part of the water mist is sprayed out of the cloth range, reducing the amount of water sprayed on the cloth edge.

[0062] Example 2 discloses a knitted stretch fabric dyeing process, including: S01, unwinding the grey fabric; S02, pre-shrinking the grey fabric unwound in S01 through a pre-shrinking machine; S03, pre-setting the fabric pre-shrunk in S02; S04, dyeing the fabric pre-set in S03; S05, washing the fabric dyed in S04; S06, opening the fabric washed in S05, drying and setting.

[0063] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pre-shrinking machine for knitted stretch fabric dyeing process, characterized in that: The invention comprises a frame (1), wherein an overfeed roller (11), a flattening roller (12), a pressure roller (13) and a cloth outlet roller (14) are sequentially arranged on the frame (1), a rubber blanket tension roller (15) is arranged below the pressure roller (13), the cloth outlet roller (14) is connected to a traction motor (141), the overfeed roller (11) is connected to an overfeed motor (111), the pressure roller (13) and the rubber blanket tension roller (15) are both heating rollers, and a weft skew adjustment device (3) is arranged between the overfeed roller (11) and the flattening roller (12), the weft skew adjustment device (3) comprising an infrared detector. An edge mechanism (4), a controller (5) and two weft skew adjustment members (6), wherein the infrared edge detection mechanism (4) is arranged at both ends of a pressure roller (13) and is electrically connected to the controller (5) for detecting the positions of the fabric edges at both ends of the pressure roller (13) so as to determine the weft skew situation; the controller (5) is connected to the weft skew adjustment members (6) and controls the weft skew adjustment members (6) to change the input speed of the corresponding fabric edge after receiving the electrical signal from the infrared edge detection mechanism (4); a humidifying device (2) is arranged on the frame (1), and the humidifying device (2) is located on the side of the pressure roller (13) facing away from the fabric outlet roller (14); The weft oblique adjustment member (6) comprises a driving wheel (61), a variable speed motor (62) for driving the driving wheel (61) to rotate, and a resistance block (63) arranged at the outer edge of the driving wheel (61) and distributed along the circumference of the driving wheel (61), wherein the surface of the resistance block (63) facing away from the axis of the driving wheel (61) is arranged as an arc-shaped resistance surface (6321), and the arc-shaped resistance surface (6321) is used to contact the surface of the fabric so as to drive the edge of the fabric to be transported through friction; The abutment block (63) comprises a column base (631) and a plurality of movable plates (632); the column base (631) is arranged on the outer edge of the driving wheel (61) and is coaxial with the driving wheel (61); the movable plates (632) are rotatably mounted on the outer side wall of the column base (631) and are distributed along the circumference of the driving wheel (61); the arcuate abutment surface (6321) is arranged on the surface of the movable plate (632) facing away from the axis of the driving wheel (61); the rotation axis between the column base (631) and the movable plate (632) is arranged along the cloth conveying direction so that the rotation plane is a vertical plane where the cloth width is located; the rotation axis is located at one end of the column base (631) close to the center of the cloth surface; and the frame (1) is provided with a speed change member (7) for adjusting the angle between the column base (631) and the movable plate (632) so as to change the linear speed of the arcuate abutment surface (6321); The speed change member (7) comprises a driving guide cylinder (71) and an electric cylinder (772) for driving the driving guide plate to be inserted between the column base (631) and the movable plate (632) along the width direction of the fabric surface; the electric cylinder (772) is arranged on the frame (1); a push rod of the electric cylinder (772) is coaxially arranged with the driving wheel (61); the driving guide cylinder (71) is sleeved outside the column base (631) and is located between the angle between the column base (631) and the movable plate (632); the inner wall of the driving guide cylinder (71) is in contact with the outer wall of the column base (631) to form a sliding (75); and the driving guide cylinder (71) is connected to the push rod of the electric cylinder (772).

2. A pre-shrinking machine for knitted stretch fabric dyeing process according to claim 1, characterized in that: The speed change member (7) comprises a driving protrusion (73) and a sliding block (74), wherein the driving protrusion (73) is arranged on the outer wall of the column base (631), and a sliding groove (75) is provided on the vertical side wall of the driving guide cylinder (71) facing the center of the cloth along the radial direction of the driving wheel (61) and penetrating the inner and outer walls of the driving guide cylinder (71), and a plurality of sliding grooves (75) are arranged along the circumference of the driving guide cylinder (71), and the sliding block (74) is slidably arranged in the sliding groove (75), and the driving guide cylinder (71) ) is provided with an annular connecting groove (76) on the side wall facing the center of the cloth, the connecting groove (76) penetrates the inner wall of the driving guide cylinder (71) in the axial direction of the driving guide cylinder (71), the connecting groove (76) is used to allow the driving protrusion (73) to rotate smoothly when the driving wheel (61) rotates, and the side of the driving protrusion (73) facing away from the center of the cloth is provided with a conical guide surface (731), and the inclination direction of the conical guide surface (731) is such that the radius gradually increases from the driving guide cylinder (71) to the driving protrusion (73).

3. A preshrinking machine for knitted stretch fabric dyeing process according to claim 2, characterized in that: The humidifying device (2) comprises a water supply pipe (21) and humidifying nozzles (22) distributed along the length direction of the water supply pipe (21); the water supply pipe (21) is connected to a water supply source; the water supply pipe (21) is arranged along the width direction of the cloth and is located above the weft adjustment device (3); and the humidifying nozzles (22) are arranged toward the surface of the cloth.

4. A pre-shrinking machine for knitted stretch fabric dyeing process according to claim 3, characterized in that: The humidifying nozzles (22) comprise a cloth edge nozzle (221) for humidifying cloth edges and a cloth surface nozzle (222) for humidifying cloth between cloth edges. The cloth edge nozzles (221) are located at both ends of the water supply pipe (21) and are rotatably connected to the water supply pipe (21). The rotating shaft of the rotatable connection is arranged along the length direction of the cloth. The cloth edge nozzles (221) are connected to the push rod of the electric cylinder (772), so that when the push rod of the electric cylinder (772) drives the driving guide cylinder (71) to move toward the center of the cloth surface, the cloth edge nozzles (221) are driven to rotate toward the outside of the cloth, thereby reducing the humidification efficiency.

5. The preshrinking machine for knitted stretch fabric dyeing process according to claim 1, characterized in that: A reset member (64) is provided between the column base (631) and the movable plate (632) for driving the movable plate (632) to rotate in the direction of the column base (631).

6. A pre-shrinking machine for knitted stretch fabric dyeing process according to claim 5, characterized in that: The reset member (64) comprises a reset torsion spring arranged between the column base (631) and the movable plate (632).

7. A knitted stretch fabric dyeing process, characterized in that: include: S01, unwinding of grey fabric; S02, pre-shrinking the grey cloth unwound in S01 by means of a pre-shrinking machine according to any one of claims 1 to 6; S03, pre-shaping the fabric that has been pre-shrunk in S02; S04, dyeing the fabric pre-shaped in S03; S05, washing the fabric dyed in S04; S06, opening the fabric washed in S05, drying and shaping it.

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