Fabric dyeing device and dyeing process

Abstract

The invention relates to the technical field of fabric dyeing, and particularly discloses a fabric dyeing device and a fabric dyeing process. The fabric dyeing device comprises a dyeing machine body and a connecting pipe which is obliquely arranged; a pre-extrusion module, a secondary extrusion module and a stretching module arranged between the pre-extrusion module and the secondary extrusion module are arranged in the connecting pipe; the pre-extrusion module and the secondary extrusion module each comprise two extrusion rollers which are arranged up and down and rotate in the connecting pipe, and the gap between the extrusion rollers of the secondary extrusion module is smaller than the gap between the extrusion rollers of the pre-extrusion module. The dyeing machine has the advantages that stretched cloth is uniform in thickness, dye liquor discharging efficiency is higher during secondary extrusion, meanwhile, due to the fact that the cloth is stretched at the moment, the extruded cloth is in a flat state and does not have more wrinkles, the quality of the cloth is guaranteed, the connecting pipe is obliquely arranged and communicated with the dyeing machine body, and therefore the cloth is not prone to wrinkling. The extruded dye liquor can flow back into the dyeing machine body again, and recycling of the dye liquor is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of fabric dyeing, and in particular to a fabric dyeing device and a dyeing process. Background Art

[0002] Overflow dyeing machine is a dyeing equipment currently used in printing and dyeing factories. It is mainly used for pre- and post-treatment and dyeing of various pure cotton, pure polyester, polyester-cotton, polyester and other knitted fabrics. It can also be used for scouring, bleaching, pre-shrinking, alkali reduction and other processing of fabrics.

[0003] The Chinese patent with the authorization announcement number CN216639947U discloses an overflow dyeing machine, which belongs to the technical field of dyeing machines, and includes a dyeing machine body, the output end of the dyeing machine body is hinged with a round cover, the outer surface of the dyeing machine body is welded with a fixing rod, the end of the fixing rod away from the dyeing machine body is welded with a support frame, the inner cavity of the support frame is movably connected with an extrusion cylinder, the inner cavity of the support frame is provided with a limit extrusion structure for limiting the sliding distance of the extrusion cylinder up and down, and the inner cavity of the support frame is slidably connected with a fixing cylinder. The overflow dyeing machine, through the coordinated use of the support frame, the extrusion cylinder and the fixing cylinder, the processed dyed cloth can release excess dyeing liquid, and then through the coordinated use of the collection box and the filter net, the excess dyeing liquid can be collected and impurities can be filtered. Further, through the coordinated use of the collection box, the floating plate and the alarm, the personnel can be quickly reminded to replace the dyeing liquid after the collection is completed, thereby achieving the effect of reducing the waste of water resources and avoiding environmental pollution.

[0004] When the cloth comes out of the discharge port of the machine cylinder, the cloth contains a lot of dye liquid. In the above technical solution, the dye liquid in the cloth is squeezed out by squeezing the cloth with an extrusion cylinder. However, since the cloth is in a wrinkled state before squeezing and the thickness is uneven, not only the cloth is locally squeezed unevenly, but also the cloth after squeezing is wrinkled, which affects the quality of the cloth and subsequent processing. At the same time, the squeezing mechanism is arranged outside the machine cylinder, which will cause the dye liquid to splash during the rapid squeezing of the cloth. Summary of the invention

[0005] The present invention provides a fabric dyeing device and a dyeing process, aiming to solve the problem in the related art that when the fabric comes out from the discharge port of a machine cylinder, the fabric contains a lot of dye liquid. In the above technical solution, the dye liquid in the fabric is squeezed out by squeezing the fabric with an extrusion cylinder. However, since the fabric is in a wrinkled state before squeezing and has an uneven thickness, not only the fabric is locally squeezed unevenly, but also the fabric is wrinkled after squeezing, which affects the quality of the fabric and subsequent processing. At the same time, the squeezing mechanism is arranged outside the machine cylinder, which causes the dye liquid to splash during the rapid squeezing of the fabric.

[0006] A fabric dyeing device of the present invention comprises: a dyeing machine body and an inclined connecting pipe; a pre-extrusion module, a secondary extrusion module and a stretching module arranged between the pre-extrusion module and the secondary extrusion module are arranged in the connecting pipe; the pre-extrusion module and the secondary extrusion module each comprise two extrusion rollers arranged up and down and rotating in the connecting pipe, and the gap between the extrusion rollers of the secondary extrusion module is smaller than the gap between the extrusion rollers of the pre-extrusion module; the stretching module comprises a stretching stand and a bearing shell arranged in the connecting pipe, a plurality of stretching components arranged in the bearing shell, and a driving member; each group of stretching components comprises two rotating drums rotating along the axis of the bearing shell, and each rotating drum is provided with a telescopic A piece, an angle is formed between the front and rear telescopic pieces, a transmission assembly is provided between the two rotating drums, so that the two rotating drums turn in opposite directions, one of the rotating drums is connected to the driving piece, so that the two rotating drums respectively drive the telescopic piece to swing forward and backward, and the telescopic piece is provided with a stretching piece abutting against the stretching platform; a guide groove of a one-way structure is provided on the connecting pipe at a position corresponding to each stretching piece, the guide groove has a stretching section and a return section connected to each other, the stretching section is parallel to the stretching platform, and a guide rod with one end penetrating into the guide groove is provided on the stretching piece, and the guide rod is used to cooperate with a groove wall on one side of the guide groove to make the cloth stretched on the stretching platform when the stretching piece moves along the stretching section.

[0007] Beneficial effect: The cloth first passes through the two squeezing rollers of the pre-squeezing module to initially squeeze out most of the dye liquid. Then, when the cloth passes through the stretching stand, the stretching piece will always press the cloth on the surface of the stretching stand. As the stretching piece moves, the front and rear stretching pieces will respectively press the front and rear ends of the cloth to stretch the cloth to the front and rear sides, thereby stretching the cloth on the surface of the stretching stand. The stretched cloth finally passes through the two squeezing rollers of the secondary squeezing module to squeeze out all the dye liquid in the cloth. The stretched cloth has a uniform thickness, and the dye liquid discharge efficiency is higher during the secondary squeezing. At the same time, since the cloth has been stretched at this time, the squeezed cloth is in a flat state and will not have many wrinkles, ensuring the quality of the cloth. Since the connecting pipe is inclined and connected to the dyeing machine body, the extruded dye liquid will flow back into the dyeing machine body, and there is no need to recycle the dye liquid, saving manpower and avoiding the splashing of the dye liquid.

[0008] Preferably, the telescopic end of the telescopic piece is fixedly mounted with a fixed frame, the stretching piece is a cylindrical structure, and the stretching piece rotates on the fixed frame along its own axis, the guide rod is fixed to the stretching piece and is coaxially arranged therewith, a driving gear is fixedly mounted on the guide rod, and a rack meshing with the driving gear is fixedly mounted on the upper groove wall of the stretching section, so that the stretching piece can rotate when moving along the stretching section.

[0009] The effect is that the stretching member rotates to continuously rub the cloth in the stretching direction, which can accelerate the stretching of the cloth and also effectively shorten the length of the stretching section.

[0010] Preferably, the stretching platform is an arc-shaped structure, and the stretching section and the return section are both arc-shaped structures that are consistent with and parallel to the curvature of the stretching platform.

[0011] The effect is that when the cloth reaches the arc-shaped stretching table, it is conducive to stretching it to the front and rear sides.

[0012] Preferably, the guide groove further includes two connecting sections, which are used to connect the stretching section and the return section. Steps are provided in the connecting sections, and a spring block is elastically slidably connected to the guide rod, so that the guide rod moves unidirectionally along the guide groove.

[0013] Preferably, the transmission assembly comprises two fixed gears which are respectively fixed on opposite surfaces of the rotating drum and are coaxially arranged, and a transmission gear which meshes with the two fixed gears at the same time is mounted on the bearing shell.

[0014] The effect is to ensure that the two drums rotate in opposite directions.

[0015] Preferably, the driving member comprises a driving motor installed in the bearing shell, the output end of the driving motor is provided with a driving shaft, and one of the rotating drums of each stretching assembly is fixedly connected to the driving shaft.

[0016] Preferably, the telescopic member is composed of two slidably matched rectangular plates.

[0017] Preferably, a conveying section is provided on the side of the stretching stand, and the conveying section is an arc-shaped structure near one end of the stretching stand, and the conveying section gradually transitions from the arc-shaped structure to the plane structure from the end near the stretching stand to the other end.

[0018] Preferably, a working window is provided on the connecting pipe, and a sealing door is rotatably mounted on the working window.

[0019] The effect is that it is convenient to inspect the inside of the connecting pipe and to pass the cloth out of the connecting pipe.

[0020] Preferably, a fabric dyeing process, using the above fabric dyeing device, comprises the following steps: Step 1: Pass one end of the dyed cloth through two squeezing rollers of the pre-squeezing module, the stretching unit and two squeezing rollers of the secondary squeezing module in sequence; Step 2: The fabric first passes through two squeezing rollers of the pre-squeezing module, and the squeezing rollers squeeze out most of the dye in the fabric, and the squeezed dye flows back into the dyeing machine through the connecting pipe; Step 3: The cloth passes through the stretching assembly, and the front and rear stretching members continuously press the front and rear ends of the cloth to stretch the cloth to the front and rear sides on the stretching stand. Multiple sets of stretching assemblies realize continuous stretching of the cloth. Step 4: The stretched cloth reaches the two squeezing rollers of the secondary squeezing module. The two squeezing rollers perform secondary squeezing on the stretched cloth to completely squeeze out the dye liquid in the cloth. The squeezed dye liquid flows back into the dyeing machine body through the connecting pipe.

[0021] By adopting the above technical solution, the beneficial effects of the present invention are as follows: The fabric first passes through the two squeezing rollers of the pre-squeezing module to remove most of the dye liquid. Then, when the fabric passes through the stretching stand, the stretching piece will always press the fabric on the surface of the stretching stand. As the stretching piece moves, the front and rear stretching pieces will press the front and rear ends of the fabric respectively to stretch the fabric to the front and rear sides, thereby stretching the fabric on the surface of the stretching stand. The stretched fabric finally passes through the two squeezing rollers of the secondary squeezing module to squeeze out all the dye liquid in the fabric. The stretched fabric has a uniform thickness, and the dye liquid discharge efficiency is higher during the secondary squeezing. At the same time, since the fabric has been stretched at this time, the squeezed fabric is in a flat state and will not have many wrinkles, ensuring the quality of the fabric. Since the connecting pipe is inclined and connected to the dyeing machine body, the extruded dye liquid will flow back into the dyeing machine body, and there is no need to recycle the dye liquid, saving manpower and avoiding dye liquid splashing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a cross-sectional view of the present invention.

[0024] Figure 3 It is a schematic diagram of the exploded view of the connecting pipe, the bearing shell and the stretching stand of the present invention.

[0025] Figure 4 It is a structural schematic diagram of the stretching stand of the present invention.

[0026] Figure 5 It is a schematic structural diagram of the guide frame of the present invention.

[0027] Figure 6 It is a structural schematic diagram of the stretching member of the present invention.

[0028] Figure 7 It is a schematic structural diagram of the guide rod of the present invention.

[0029] Figure 8 It is a cross-sectional view of the stretching member of the present invention.

[0030] Fig. 9 It is a schematic diagram of the guide groove of the present invention.

[0031] Fig.10 It is a cross-sectional view of the load-bearing shell of the present invention.

[0032] Reference numerals: 10. Dyeing machine body; 20. Connecting pipe; 21. Cover; 22. Working window; 23. Sealing door; 30. Pre-extrusion roller; 40. Carrying shell; 41. Driving motor; 42. Driving shaft; 43. Rotating drum; 44. Fixed gear; 45. Transmission gear; 46. Telescopic member; 47. Fixed frame; 48. Stretching member; 50. Guide frame; 51. Guide groove; 52. Stretching section; 53. Return section; 54. Connecting section; 55. Rack; 56. Step; 60. Guide rod; 61. Driving gear; 62. Elastic member; 63. Spring block; 70. Stretching stand; 71. Conveying section; 80. Secondary extrusion roller. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0034] like Figures 1 to 10 As shown, a specific embodiment of a fabric dyeing device of the present invention includes a dyeing machine body 10, a connecting pipe 20, a pre-extrusion module, a stretching module and a secondary extrusion module.

[0035] The connecting pipe 20 is arranged at the discharge port of the dyeing machine body 10, and is used to carry the pre-extrusion module, the stretching module and the secondary extrusion module. The pre-extrusion module is used to perform preliminary extrusion on the cloth taken out from the dyeing machine body 10, first squeezing out most of the dye liquid in the cloth to facilitate stretching the cloth, and then the stretching module stretches the cloth that has been preliminarily squeezed to keep the cloth as flat as possible. Finally, the stretched cloth is squeezed by the secondary extrusion module to completely squeeze out the dye liquid in the cloth.

[0036] In this embodiment, the axial direction of the dyeing machine body 10 is defined as the left-right direction.

[0037] like Figure 1 , Figure 2 and Figure 3 As shown, the connecting pipe 20 is a tubular structure with both ends open, and the connecting pipe 20 is arranged at the discharge port on the right side of the dyeing machine body 10. The connecting pipe 20 is connected to the discharge port of the dyeing machine body 10, and the connecting pipe 20 is arranged obliquely, the axis of the connecting pipe 20 is arranged in the left-right direction, and the right end of the connecting pipe 20 is higher than the height of the left end. The connecting pipe 20 is inclined and one end is connected to the dyeing machine body 10, so that the dye liquid squeezed out of the cloth by the pre-extrusion module and the secondary extrusion module can flow back into the dyeing machine body 10.

[0038] A cover body 21 is rotatably installed at the right end opening of the connecting pipe 20. The cover body 21 rotates along an axis extending in the front-to-back direction. The cover body 21 can open and close the opening at the right end of the connecting pipe 20, so that when the device is not working, the connecting pipe 20 can be sealed to prevent dust and impurities in the air from entering the device.

[0039] A rectangular working window 22 is provided on the front side of the connecting pipe 20, and a sealing door 23 for controlling its opening and closing is rotatably mounted on the working window 22. The working window 22 is used for inspecting the internal device and for passing the cloth through the connecting pipe 20. When in working state, the working window 22 is in a closed state.

[0040] like Figure 3 As shown, the pre-squeezing module includes two pre-squeezing rollers 30 arranged up and down, and the two pre-squeezing rollers 30 are rotatably mounted in the connecting pipe 20 near the left end (the connection between the connecting pipe 20 and the dyeing machine body 10). The plane where the axes of the two pre-squeezing rollers 30 are located is perpendicular to the axis of the connecting pipe 20.

[0041] The dyed fabric in the dyeing machine body 10 passes between the two pre-squeezing rollers 30. The two pre-squeezing rollers 30 can squeeze out most of the dye in the fabric, but there is still a part of the dye in the fabric. When it reaches the secondary squeezing module, it needs to be squeezed again to squeeze out the dye in the fabric completely. The purpose of setting the pre-squeezing rollers 30 is that if the fabric is too wet, it is not easy to stretch, so a part of the dye in the fabric is squeezed out first, so that it is easy to stretch the fabric when it reaches the stretching module.

[0042] like Figures 4 to 10 As shown, the stretching module includes a stretching stand 70 and a stretching component.

[0043] The stretching stand 70 is fixedly installed inside the connecting tube 20, and the stretching stand 70 is located between the pre-extrusion roller 30 and the secondary extrusion module. In this embodiment, the stretching stand 70 is an arc-shaped structure, and the axis of the stretching stand 70 is parallel to the left and right directions. When the cloth passes through the upper surface of the stretching stand 70, since the stretching stand 70 is an arc-shaped structure, the cloth will stretch to the front and rear sides, thereby cooperating with the stretching component to facilitate the stretching of the wrinkled cloth.

[0044] like Figure 4 As shown, a conveying section 71 is provided on the right side of the stretching stand 70, the left end of the conveying section 71 is the same arc structure as the stretching stand 70, the right end of the conveying section 71 is a plane structure, and the upper surface of the conveying section 71 gradually transitions from an arc surface to a plane from left to right. The cloth needs to be conveyed from the stretching stand 70 to the right side to the secondary extrusion module, so that the conveying section 71 can smoothly transform the cloth from the arc state on the stretching stand 70 to the horizontal state, and the cloth transformed into the horizontal state is squeezed again by the secondary extrusion module to squeeze out all the dyes in the cloth.

[0045] The stretching assembly includes a bearing shell 40 fixedly installed in the connecting tube 20 . The bearing shell 40 is located directly above the stretching stand 70 , and the axis of the bearing shell 40 is parallel to the axis of the connecting tube 20 .

[0046] A driving motor 41 is fixedly installed at a position near the right end inside the bearing shell 40 , and a driving shaft 42 is fixedly installed at the output end of the driving motor 41 . The driving shaft 42 is coaxially arranged with the bearing shell 40 .

[0047] In this embodiment, at least two stretching units are arranged in the bearing shell 40, and each stretching unit includes two rotating drums 43 spaced apart along the axial direction of the bearing shell 40. The two rotating drums 43 are coaxially arranged and can rotate along the axis of the bearing shell 40. One of the rotating drums 43 is rotatably mounted on the bearing shell 40, and the other is connected to the driving shaft 42, so that the driving motor 41 can drive one of the rotating drums 43 to rotate through the driving shaft 42.

[0048] The two rotating drums 43 are provided with fixed gears 44 on their opposite surfaces. The two fixed gears 44 are symmetrically arranged and coaxially arranged with the rotating drums 43. A transmission gear 45 is rotatably mounted on the bearing shell 40. The transmission gear 45 is meshed with the fixed gears 44 on the two rotating drums 43 at the same time (such as Figure 6 As shown in FIG. 4 , when the rotating drum 43 on one side rotates, the rotating drum 43 on the other side can be driven to rotate synchronously through the fixed gear 44 and the transmission gear 45. It is particularly noted that the rotation directions of the two rotating drums 43 are opposite.

[0049] The driving motor 41 drives the driving shaft 42 to continuously rotate forward and reverse, thereby driving the two rotating drums 43 to continuously rotate forward and reverse.

[0050] The bottom of the two rotating drums 43 are fixedly mounted with telescopic members 46. In this embodiment, the telescopic members 46 are composed of two slidingly matched rectangular plates. In the initial state, the telescopic members 46 on the two rotating drums 43 are tilted, and there is an angle (such as Figure 5 and Figure 6 ), that is, the two telescopic members 46 are arranged in an eight-shaped shape. When the two rotating drums 43 rotate continuously, the two telescopic members 46 are driven to swing back and forth respectively. Since the two rotating drums 43 rotate in opposite directions, when the two rotating drums 43 rotate, the angle between the two telescopic members 46 increases or decreases.

[0051] The lower ends of the two telescopic members 46 are fixedly mounted with a fixing frame 47, and a stretching member 48 is rotatably mounted on the fixing frame 47. In this embodiment, the stretching member 48 is a cylindrical structure, and the axis of the stretching member 48 is parallel to the axis of the rotating drum 43. The outer peripheral wall of the stretching member 48 can be provided with a protrusion to increase the friction between the stretching member 48 and the cloth.

[0052] A plurality of guide frames 50 are installed in the bearing shell 40 , each guide frame 50 corresponds to one of the fixing frames 47 , and a guide groove 51 is formed on one side of the guide frame 50 facing the fixing frame 47 , and the guide groove 51 is in an annular structure.

[0053] like Fig. 9 As shown, the guide groove 51 has a stretching section 52, a return section 53 and a connecting section 54. The stretching section 52 and the return section 53 are both arc-shaped structures that are consistent with and parallel to the stretching stand 70. The return section 53 is located above the stretching section 52. Two connecting sections 54 are provided, connecting the two ends of the stretching section 52 and the return section 53 respectively. In this embodiment, the two connecting sections 54 are both semicircular structures. Steps 56 are provided near the middle of the two connecting sections 54, so that the guide groove 51 is a one-way groove.

[0054] like Figure 6 and Figure 8 As shown, a guide rod 60 is fixedly connected to one side of the guide groove 51 on the rotating shaft of the stretching member 48, and the guide rod 60 is coaxially arranged with the stretching member 48. One end of the guide rod 60 penetrates into the guide groove 51, and the guide rod 60 is used to stop and cooperate with a groove wall of one side of the guide groove 51.

[0055] A spring block 63 is slidably mounted on the inner side of the guide rod 60 along the axial direction thereof. The spring block 63 is coaxially arranged with the guide rod 60, and an elastic member 62 is connected between the spring block 63 and the guide rod 60. In this embodiment, the elastic member 62 is a spring, one end of which is fixedly connected to the spring block 63, and the other end is fixedly connected to the guide rod 60. One end of the spring block 63 extends to the outer side of the guide rod 60 and abuts against the bottom of the guide groove 51. The guide rod 60 can cyclically move along the path of the guide groove 51. The spring block 63 cooperates with the step 56 in the guide groove 51 to ensure that the guide rod 60 can only move in one direction. When the spring block 63 passes over the step 56, the spring block 63 cannot move in the reverse direction.

[0056] A driving gear 61 is fixedly mounted on the outer side of the guide rod 60, and a rack 55 is provided on the upper groove wall of the stretching section 52 at a position corresponding to the driving gear 61. When the guide rod 60 moves along the stretching section 52, the driving gear 61 meshes with the rack 55, thereby forcing the stretching member 48 to rotate.

[0057] In other embodiments, the stretching member 48 may also be in other shapes that are fixedly mounted on the fixing frame 47 . When the two are fixedly connected, the rack 55 will no longer be provided in the guide groove 51 .

[0058] In the initial state, the angle between the front and rear telescopic members 46 is the smallest, that is, both are located near the top of the stretching stand 70. At this time, the stretching member 48 presses the cloth on the upper surface of the stretching stand 70, and the front and rear stretching members 48 are respectively located near the front and rear ends of the cloth. When the telescopic member 46 is in the initial position, the guide rod 60 corresponding to the telescopic member 46 is also located at the end of the stretching section 52 on the guide groove 51 close to the top of the stretching stand 70.

[0059] When the driving motor 41 drives the front and rear telescopic members 46 to swing, the telescopic members 46 will first rotate outward, that is, the front telescopic member 46 will rotate forward, and the rear telescopic member 46 will rotate backward, so that the angle between the front and rear telescopic members 46 will increase.

[0060] As the telescopic member 46 continues to swing outward, the telescopic member 46 drives the fixed frame 47 and the stretching member 48 to move synchronously. The guide rod 60 on the stretching member 48 moves along the stretching section 52. When the guide rod 60 moves along the stretching section 52, the driving gear 61 engages with the rack 55, thereby forcing the stretching member 48 to rotate. When the stretching member 48 rotates, the cloth can be rubbed in the stretching direction.

[0061] When the guide rod 60 moves along the stretching section 52, the telescopic member 46 will not only rotate, but also be adaptively telescopic, that is, when the guide rod 60 moves along the stretching section 52, the telescopic member 46 will be extended. In this process, the stretching member 48 will always press the cloth on the upper surface of the stretching platform 70. As the stretching member 48 moves, the front and rear stretching members 48 will respectively press the front and rear ends of the cloth to stretch the cloth to the front and rear sides, that is, the front and rear stretching members 48 will press the front edge of the cloth and pull the cloth to the front side by the friction between the two, and the rear stretching member 48 will press the rear edge of the cloth and pull the cloth to the rear side by the friction between the two, so that the cloth is stretched on the upper surface of the stretching platform 70.

[0062] In the process of the stretching member 48 pressing the cloth to stretch it, the stretching member 48 can rotate around its own axis through the meshing of the driving gear 61 and the rack 55, and the rotation of the front and rear stretching members 48 can rub the cloth to move in the stretching direction of the cloth, which can further help the stretching member 48 to stretch the cloth. That is, in the process of the stretching member 48 pressing the cloth to stretch it, the stretching member 48 rotates at the same time to rub the cloth in the stretching direction, which can effectively ensure that the cloth is fully stretched in the front and rear directions.

[0063] The stretching member 48 rotates to rub the fabric in the stretching direction continuously, which can speed up the stretching of the fabric and also effectively shorten the length of the stretching section 52. It is not necessary to set the stretching section 52 to be the same as the stretching length, which is suitable for situations where the fabric is wider.

[0064] When the guide rod 60 reaches the end of the stretching section 52, the angle between the two telescopic members 46 reaches the maximum, and the cloth can be fully stretched out at this time. It is particularly noted that while the cloth is being stretched out, the cloth still remains in a state of being transported to the right side.

[0065] Then the guide rod 60 enters the return section 53 through the connecting section 54. Since the return section 53 is higher than the height of the stretching section 52, the stretching member 48 will be lifted up and away from the cloth when it returns, so as to avoid bringing the cloth back when it returns. During the process of the guide rod 60 returning along the return section 53, the telescopic member 46 is gradually shortened until the guide rod 60 reaches one end close to the top of the stretching stand 70 along the return section 53, and then passes through the connecting section 54 on the other side again to enter the initial position of the stretching section 52, so as to continuously circulate and continuously stretch the cloth in the conveying process in the forward and backward directions. It should be emphasized that the steps 56 set in the connecting sections 54 on both sides can ensure that the guide rod 60 can only circulate in one direction. That is, the principle is the same as that of the one-way slot, which will not be elaborated here.

[0066] It is particularly noted that at least two stretching units are arranged in the supporting shell 40. When the guide rod 60 on the stretching member 48 in one of the stretching units enters the return section 53, the stretching member 48 leaves the cloth and has no stretching effect on the cloth. Therefore, the guide rod 60 on the stretching member 48 in the other group of stretching units can be located in the stretching section 52. The two groups of stretching members 48 work alternately to ensure continuous stretching of the cloth during the conveying process.

[0067] The stretched cloth passes through the conveying section 71 and enters the secondary extrusion module for re-extrusion to completely squeeze out the dye liquid in the cloth.

[0068] like Figure 3 As shown, the secondary squeezing module includes two secondary squeezing rollers 80 arranged up and down, and the two secondary squeezing rollers 80 are rotatably mounted in the connecting tube 20 near the right end (the right side discharge port of the connecting tube 20). The plane where the axes of the two secondary squeezing rollers 80 are located is perpendicular to the axis of the connecting tube 20. A motor (not shown in the figure) for driving the secondary squeezing rollers 80 to rotate is installed on the rear side of the connecting tube 20, thereby driving the two secondary squeezing rollers 80 to rotate actively, and the two secondary squeezing rollers 80 can generate a drag force on the cloth, thereby pulling the dyed cloth from the dyeing machine body 10.

[0069] It should be emphasized that the gap between the two secondary squeezing rollers 80 for the cloth to pass through is smaller than the gap between the two pre-squeezing rollers 30 for the cloth to pass through.

[0070] The stretched cloth passes between the two secondary squeezing rollers 80, and the thickness of the stretched cloth will be more uniform. The two secondary squeezing rollers 80 will completely squeeze the cloth, squeeze out all the dyeing liquid in the cloth, and the cloth thickness will be uniform, and the dyeing liquid discharge efficiency will be higher. At the same time, since the cloth has been stretched at this time, the squeezed cloth is in a flat state, and there will not be many wrinkles, which ensures the quality of the cloth. And because the connecting pipe 20 is tilted and connected to the dyeing machine body 10, the squeezed dyeing liquid will flow back into the dyeing machine body 10 again, and there is no need to specially recycle the dyeing liquid, which saves manpower and avoids the situation of dyeing liquid splashing.

[0071] According to the fabric dyeing device of the embodiment of the present invention, the dyeing process thereof comprises the following steps: Step 1: One end of the dyed cloth is passed through two pre-squeezing rollers 30, a stretching unit and two secondary squeezing rollers 80 in sequence. The secondary squeezing rollers 80 rotate to pull the cloth to the right. Step 2: The cloth first passes through two pre-extrusion rollers 30, which squeeze out most of the dye in the cloth to facilitate subsequent stretching. The squeezed dye flows back into the dyeing machine body 10 through the connecting pipe 20; Step 3, the cloth then passes through the stretching unit, and the front and rear stretching members 48 continuously press the front and rear ends of the cloth to stretch the cloth to the front and rear sides on the stretching stand 70, and at the same time, the stretching member 48 will also rotate around its own axis to further rub the cloth in the stretching direction, speeding up the stretching of the cloth, and multiple groups of stretching units realize continuous stretching of the cloth; Step 4: The stretched cloth reaches the secondary squeezing roller 80. The two secondary squeezing rollers 80 perform secondary squeezing on the cloth with uniform thickness and flatness, and completely squeeze out the dye in the cloth. The cloth thickness is uniform, and the dye discharge efficiency is higher. Moreover, the squeezed cloth is flat without many wrinkles, which ensures the quality of the cloth. The squeezed dye flows back into the dyeing machine body 10 through the connecting pipe 20.

[0072] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A fabric dyeing device, comprising: The dyeing machine body and the connecting pipe arranged obliquely are characterized in that the connecting pipe is provided with a pre-extrusion module, a secondary extrusion module and a stretching module arranged therebetween; the pre-extrusion module and the secondary extrusion module both include two extrusion rollers arranged up and down and rotating in the connecting pipe, and the gap between the extrusion rollers of the secondary extrusion module is smaller than the gap between the extrusion rollers of the pre-extrusion module; The stretching module includes a stretching platform and a bearing shell arranged on a connecting tube, a plurality of stretching components arranged on the bearing shell, and a driving member; each stretching component includes two rotating drums rotating along the axis of the bearing shell, each rotating drum is provided with a telescopic member, an angle is formed between the front and rear telescopic members, a transmission component is provided between the two rotating drums, so that the two rotating drums turn in opposite directions, one of the rotating drums is connected to the driving member, so that the two rotating drums respectively drive the telescopic members to swing forward and backward, and a stretching member abutting against the stretching platform is provided on the telescopic member; A guide groove of a one-way structure is provided on the connecting tube at a position corresponding to each stretching piece. The guide groove has a stretching section and a return section which are interconnected. The stretching section is parallel to the stretching table. A guide rod with one end inserted into the guide groove is provided on the stretching piece. The guide rod is used to cooperate with a groove wall on one side of the guide groove to enable the stretching piece to stretch the cloth on the stretching table when it moves along the stretching section.

2. A fabric dyeing device according to claim 1, characterized in that: The telescopic end of the telescopic member is fixedly installed with a fixed frame, the stretching member is a cylindrical structure, and the stretching member rotates on the fixed frame along its own axis, the guide rod is fixed to the stretching member and is coaxially arranged with it, a driving gear is fixedly installed on the guide rod, and a rack meshing with the driving gear is fixedly installed on the upper groove wall of the stretching section, so that the stretching member can rotate when moving along the stretching section.

3. A fabric dyeing device according to claim 1, characterized in that: The stretching platform is an arc-shaped structure, and the stretching section and the return section are both arc-shaped structures that are consistent with and parallel to the curvature of the stretching platform.

4. A fabric dyeing device according to claim 1, characterized in that: The guide groove also includes two connecting sections, which are used to connect the stretching section and the return section. Steps are arranged in the connecting sections. A spring block is elastically slidably connected to the guide rod, so that the guide rod moves unidirectionally along the guide groove.

5. A fabric dyeing device according to claim 1, characterized in that: The transmission assembly comprises two fixed gears which are respectively fixed on opposite surfaces of the rotating drum and are coaxially arranged, and a transmission gear which meshes with the two fixed gears at the same time is installed on the bearing shell.

6. A fabric dyeing device according to any one of claims 1 to 5, characterized in that: The driving member comprises a driving motor installed in the bearing shell, the output end of the driving motor is provided with a driving shaft, and one of the rotating drums of each stretching assembly is fixedly connected to the driving shaft.

7. A fabric dyeing device according to claim 6, characterized in that: The telescopic member is composed of two slidingly matched rectangular plates.

8. A fabric dyeing device according to claim 3, characterized in that: A conveying section is arranged on the side of the stretching stand. The conveying section is an arc-shaped structure near one end of the stretching stand. The conveying section gradually transitions from the arc-shaped structure to the plane structure from the one end near the stretching stand to the other end.

9. A fabric dyeing device according to claim 7, characterized in that: The connecting pipe is provided with a working window, and a sealing door is rotatably mounted on the working window.

10. A fabric dyeing process, characterized in that: The fabric dyeing device according to claim 1 comprises the following steps: Step 1: Pass one end of the dyed cloth through two squeezing rollers of the pre-squeezing module, the stretching unit and two squeezing rollers of the secondary squeezing module in sequence; Step 2: The fabric first passes through two squeezing rollers of the pre-squeezing module, and the squeezing rollers squeeze out most of the dye in the fabric, and the squeezed dye flows back into the dyeing machine through the connecting pipe; Step 3: The cloth passes through the stretching assembly, and the front and rear stretching members continuously press the front and rear ends of the cloth to stretch the cloth to the front and rear sides on the stretching stand. Multiple sets of stretching assemblies realize continuous stretching of the cloth. Step 4: The stretched cloth reaches the two squeezing rollers of the secondary squeezing module. The two squeezing rollers perform secondary squeezing on the stretched cloth to completely squeeze out the dye liquid in the cloth. The squeezed dye liquid flows back into the dyeing machine body through the connecting pipe.

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