Low-temperature environment-friendly dyeing equipment and process for polyester fabric

Abstract

The invention discloses low-temperature environment-friendly dyeing equipment and process for polyester fabrics, relates to the field of dyeing equipment, and aims to solve the problems of uneven dyeing and poor color fastness caused by difficult coloring of the polyester fabrics in a low-temperature environment. The low-temperature environment-friendly dyeing equipment comprises a rack, a feeding carrier roller is rotationally connected to the rack, a supporting seat is arranged on the side edge of the feeding carrier roller, and a pressing plate and a transmission roller are arranged on the supporting seat; a dyeing box is fixedly connected to the machine frame and fixedly connected with a double-roller dyeing frame, a driving assembly is arranged between the double-roller dyeing frame and the transmission rollers, a draining frame is arranged on the side edge of the double-roller dyeing frame, a material conveying carrier roller set is arranged on the side edge of the dyeing box and rotationally connected with the machine frame, and a discharging carrier roller is arranged on the side edge of the material conveying carrier roller set. The low-temperature dyeing machine has the advantages that by means of impurity removal through the pressing plate, uniform dipping of dye liquor through the double-roller dyeing frame and impurity removal and dye liquor circulation optimization in the process steps, it is guaranteed that dye is evenly distributed under the low-temperature condition, and dyeing uniformity and color fastness are improved.

Description

Technical Field

[0001] This invention relates to the field of dyeing equipment technology, and in particular to a low-temperature environmentally friendly dyeing equipment and process for polyester fabrics. Background Technology

[0002] Polyester (polyester fiber) has become the most widely used synthetic fiber globally due to its excellent physicochemical properties. However, traditional polyester dyeing usually requires high temperature and high pressure (above 130°C) to fully expand the amorphous regions of the fiber, allowing disperse dyes to diffuse and adhere. This process is energy-intensive, easily leads to fiber damage and a stiffer hand feel, and poses certain safety risks.

[0003] In response to the call for energy conservation and emission reduction, low-temperature dyeing technology (generally referring to dyeing below 100℃, especially under normal pressure conditions of 80-100℃) has become an important development direction in the industry. However, low-temperature dyeing faces two major technological bottlenecks in practical applications: First, under low-temperature conditions, the molecular chain mobility of polyester fibers is weak, and the amorphous region does not expand sufficiently, leading to a sharp decrease in the diffusion rate of dye molecules into the fiber interior and a significant reduction in dyeing efficiency. This not only prolongs dyeing time and affects production efficiency but also makes it easier for dye to accumulate on the fiber surface, causing problems such as uneven dyeing and poor color fastness. Existing technologies mostly rely on adding dyeing carriers to promote fiber expansion, but many traditional carriers have problems such as toxicity, poor biodegradability, and easy residual odor, which do not meet environmental protection requirements.

[0004] Secondly, although the pretreatment (scouring and desizing) of fabrics before dyeing removes most of the spinning oils and sizing agents, trace amounts of emulsified oils, hydrolyzed sizing agents, and other impurities inevitably remain on the fiber surface. These residues may be further decomposed or dispersed during high-temperature dyeing, with relatively minor impact; however, in low-temperature dyeing systems, where dye uptake is already difficult, these hydrophobic or amphiphilic residues will adhere unevenly to the fiber surface, forming local "barriers." This severely interferes with the uniformity of initial dye adsorption, becoming a major cause of color spots and discoloration, and seriously affecting product quality. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a low-temperature environmentally friendly dyeing equipment and process for polyester fabrics. This design effectively solves the problems of difficulty in dyeing polyester fabrics in low-temperature environments, resulting in uneven dyeing, poor color fastness, and affecting product quality.

[0006] To achieve the above objectives, the present invention provides the following technical solution: The present invention includes a frame, with a feeding roller rotatably connected to the end of the frame. A support seat is provided on the side of the feeding roller, and a pressure plate and a transmission roller are provided on the support seat. The support seat is fixedly connected to the frame. A dyeing box is fixedly connected to the frame, and a double-roller dyeing frame is fixedly connected to the dyeing box. A drive assembly is provided between the double-roller dyeing frame and the transmission roller. A drain rack is provided on the side of the double-roller dyeing frame and is fixedly connected to the dyeing box. A conveying roller group is provided on the side of the dyeing box and is rotatably connected to the frame. A discharge roller is provided on the side of the conveying roller group and is rotatably connected to the frame. A movable roller frame is provided on the side of the discharge roller. The dyeing box is equipped with a filter plate, and the double roller dyeing frame is located above the filter plate. Two synchronously rotating dip rollers are rotatably connected inside the double roller dyeing frame. A dye roller is located above the two feed rollers, and an outlet roller is located above the dye roller. A dye liquor box is located above the outlet roller, and an inlet pipe is fixedly connected to the dye box. The inlet pipe is connected to the bottom of the dye box.

[0007] Preferably, the drive assembly includes a first pulley, a stirring roller is coaxially and fixedly connected to the first pulley, the stirring roller is rotatably connected to the dyeing box, the stirring roller is located below the filter plate, a second pulley is fixedly connected to both the immersion roller and the liquid outlet roller, a first connecting belt is fitted between the first pulley and the second pulley, a third pulley is fixedly connected to both the first pulley and the drive roller, and a second connecting belt is fitted between the two third pulleys.

[0008] Preferably, a bevel gear set is rotatably connected inside the support base, the bevel gear set is fixedly connected to the transmission roller, a cylindrical cam is fixedly connected to the bevel gear set, a guide groove is provided on the cylindrical cam, a connecting pin is slidably connected in the guide groove, a sliding sleeve is slidably connected to the connecting pin, a guide rod is fixedly connected to the sliding sleeve, and the guide rod is fixedly connected to the pressure plate.

[0009] Preferably, the guide groove includes a first slide groove and a second slide groove, the first slide groove is a spiral groove, a tension spring is fitted on the connecting pin, a connecting block is fixedly connected to the guide rod, a fixing bolt is installed between the pressure plate and the connecting block, a key-shaped hole is provided on the pressure plate, and a first spring is sleeved on the guide rod.

[0010] Preferably, the feed roller is rotatably connected to two sides of a first adjusting block, the first adjusting block is threadedly connected to a first screw, the first screw is rotatably connected to a first support rod, the first adjusting block is slidably connected to the first support rod, and the first support rod is fixedly connected to the frame.

[0011] Preferably, the drain rack includes a second support rod, a first roller is rotatably connected to the second support rod, an adjusting pressure roller is provided above the first roller, second adjusting blocks are rotatably connected to both sides of the adjusting pressure roller, a sliding groove is provided on the second support rod for the second adjusting blocks to slide, a second screw is threadedly connected to the second adjusting blocks, and the second screw is rotatably connected to the second support rod.

[0012] Preferably, the dyeing box and the side of the second support rod are provided with a second roller.

[0013] Preferably, the frame is provided with a collection trough, and the material conveying roller group includes an upper roller body and a lower roller body. The lower roller body is rotatably connected to the collection trough, the upper roller bodies are arranged in a triangular pattern, and the upper roller body is rotatably connected to a mounting base. The mounting base is fixedly connected to the frame.

[0014] Preferably, the discharge roller is rotatably connected to a third support rod, the third support rod is hinged to the frame, a telescopic rod is hinged between the third support rod and the frame, the third support rod is provided with an adjustment groove, a third adjustment block is slidably connected in the adjustment groove, a second spring is provided on the side of the third adjustment block, an elastic pressure roller is hinged to the third adjustment block, and a third support roller is provided on the side of the elastic pressure roller.

[0015] Preferably, the fabric moves along the feed roller towards the discharge roller. After passing the feed roller, two sets of pressure plates remove impurities and flatten the middle part of the fabric. After being pressed, the fabric enters the dyeing box and is evenly immersed in circulating dye liquor between two sets of immersion rollers and dye rollers. Then, the excess liquid is drained by the drain rack, and then it is smoothly conveyed by the conveying roller set and finally discharged by the discharge roller.

[0016] Compared with the prior art, the outstanding advantages of this invention are: This application features a clamp at the fabric feeding end. Before entering the dyeing box, the fabric undergoes impurity removal and flattening treatment by the clamp, significantly improving the fabric condition before dyeing and avoiding uneven dyeing caused by impurities or wrinkles. At the same time, inside the dyeing box, the uniform immersion between the immersion roller and the liquid outlet roller ensures that the dye liquor fully and evenly penetrates into the fabric fibers, thereby obtaining a consistent and full dyeing effect.

[0017] This application achieves the circulation and reflux of dye liquor by installing a filter plate inside the dyeing box and connecting the dyeing box and the dye liquor box through a connecting pipe, while filtering and removing impurities from the dye liquor to ensure the coloring effect of the dye liquor.

[0018] This application effectively removes excess dye liquor from the fabric surface through the application of a drain rack, reducing dye waste and subsequent drying energy consumption, thus embodying the concept of environmental protection. The entire process, through the coordinated action of the conveying roller group and the discharge roller, ensures the stable and continuous transport of the fabric within the equipment, avoiding damage and secondary pollution, and ultimately achieving efficient, high-quality, and environmentally friendly low-temperature dyeing of polyester fabrics. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the forward structure of the present invention.

[0021] Figure 3 This is a schematic diagram of the upper part of the frame structure of the present invention.

[0022] Figure 4 This is a schematic diagram of the pressure plate connection structure of the present invention.

[0023] Figure 5 This is an exploded view of the cylindrical cam and sliding sleeve of the present invention.

[0024] Figure 6 This is a schematic diagram of the driving component structure of the present invention.

[0025] Figure 7 This is a schematic diagram of the front cross-sectional structure of the dyeing box of the present invention.

[0026] Figure 8 This is a schematic diagram of the liquid outlet roller structure of the present invention.

[0027] Figure 9 This is a schematic diagram of the connection structure of the stirring roller of the present invention.

[0028] Figure 10 This is a schematic diagram of the material conveying roller assembly structure of the present invention.

[0029] Figure 11 This is a schematic diagram of the axial connection structure of the third support rod of the present invention.

[0030] Figure 12 This is a schematic diagram of the forward connection structure of the third support rod of the present invention.

[0031] Figure 13 For the present invention Figure 4 A magnified structural diagram of A in the middle.

[0032] Labels in the diagram: 1. Frame; 2. Feed roller; 3. Support base; 4. Pressure plate; 5. Drive roller; 6. Dyeing box; 7. Double roller dyeing frame; 8. Drive assembly; 801. First pulley; 802. Stirring shaft; 803. Stirring roller; 804. Second pulley; 805. First connecting belt; 806. Third pulley; 807. Second connecting belt; 808. Bevel gear set; 809. Cylindrical cam; 810. Guide groove; 8101. First slide groove; 8102. Second slide groove; 811. Connecting pin; 812. Sliding sleeve; 813. Guide rod; 9. Draining frame; 901. Second support rod; 902. First roller; 903. Adjusting pressure roller; 904. 905. Second adjusting block; 10. Second screw; 10. Material conveying roller assembly; 1001. Upper roller body; 1002. Lower roller body; 11. Discharge roller; 12. Moving roller frame; 13. Filter plate; 14. Dipping roller; 15. Dye roller; 16. Discharge roller; 17. Dye liquor box; 18. Inlet pipe; 19. Tension spring; 20. Connecting block; 21. Key hole; 22. First spring; 23. First adjusting block; 24. First screw; 25. First support rod; 26. Second roller; 27. Collection trough; 28. Third support rod; 29. ​​Telescopic rod; 30. Adjusting trough; 31. Third adjusting block; 32. Second spring; 33. Elastic pressure roller; 34. Third roller. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. For ease of understanding, some key terms in this embodiment are explained below: Frame 1: As the overall support structure of the equipment, it is used to support and fix all components of the equipment, ensuring the stability and structural integrity of the equipment during operation.

[0034] Feed roller 2: Located at the end of frame 1, it is used to guide the fabric to be dyed smoothly into the dyeing equipment and is the starting point of the fabric conveying path.

[0035] Support 3: Fixedly connected to frame 1, used to install and support pressure plate 4 and drive roller 5, ensuring that these components can stably perform pretreatment operations on the fabric.

[0036] Pressure plate 4: Set on support base 3, it cooperates with drive roller 5 to apply pressure to the incoming fabric to achieve preliminary impurity removal and flattening of the fabric, providing a uniform fabric surface for subsequent dyeing process.

[0037] Drive roller 5: It is set on the support base 3 and cooperates with the pressure plate 4. It rotates under the action of the drive component 8 and works with the pressure plate 4 to transport and press the fabric.

[0038] Dyeing box 6: Fixedly connected to frame 1, it is the main container for dyeing fabrics. It contains dye liquor and provides an environment for the dye to come into contact with the fabric.

[0039] Double roller dyeing frame 7: Fixedly connected to dyeing box 6, with immersion roller 14 rotatably connected inside, used to support and guide the fabric to be immersed in the dye liquor, ensuring that the dye is applied evenly to the fabric.

[0040] Drive assembly 8: Connected between the double roller dyeing frame 7 and the drive roller 5, it is responsible for providing power to drive the drive roller 5 and the dip roller 14 and other components in the double roller dyeing frame 7 to rotate synchronously or in coordination, so as to realize the continuous conveying and dyeing of fabric.

[0041] Drain rack 9: Fixedly connected to the side of dyeing box 6, used to remove excess dye from the fabric surface after dyeing and impregnation, to avoid waste of dye and prepare for subsequent processing.

[0042] Material conveying roller group 10: Rotatably connected to the frame 1 and set on the side of the dyeing box 6, it is used to smoothly convey the fabric to the discharge stage after the fabric is drained, and maintain the tension and flatness of the fabric.

[0043] Discharge roller 11: Rotatably connected to the frame 1 and located on the side of the conveyor roller group 10, it is the final guiding component for the fabric to leave the dyeing equipment, ensuring that the fabric is smoothly discharged.

[0044] Mobile roller frame 12: Located on the side of the discharge roller 11, it is used to wind up the fabric and to bring the bundled fabric rolls to a standstill after winding.

[0045] Filter plate 13: Located inside the dyeing box 6, below the double roller dyeing frame 7, it is used to filter impurities in the dye liquor, maintain the cleanliness of the dye liquor, and prevent impurities from having an adverse effect on the dyeing effect of the fabric.

[0046] Dipping rollers 14: Set inside the double roller dyeing frame 7, usually two rollers rotate synchronously, used to completely immerse the fabric in the dye liquor, ensuring that the fabric and the dye liquor are in full contact and achieving uniform dyeing.

[0047] Dye roller 15: Located above the dip roller 14, it supports and compresses the back of the fabric, bringing the upper part of the fabric closer to the liquid discharge roller 16.

[0048] Discharge roller 16: Located above the dye support roller 15, it is used to discharge the dye liquor in the dye liquor box 17 and control the amount and uniformity of the dye liquor.

[0049] Dye liquor box 17: Located above the dispensing roller 16, it is used to store and supply dye liquor. It is connected to the bottom of the dye box through the inlet pipe 18 to form a dye liquor circulation.

[0050] Liquid inlet pipe 18: It is fixedly connected to the dye liquor box 17 and communicates with the bottom of the dye tank. It is used to transport the dye liquor from the dye tank to the dye liquor box 17 to realize the recycling of the dye liquor.

[0051] Please see the appendix Figure 1-13 This embodiment describes a low-temperature environmentally friendly dyeing equipment and process for polyester fabrics, comprising a frame 1, which serves as the skeleton of the entire equipment and supports all functional components. For example, the frame 1 can be a welded steel structure, formed by bolts or rivets, with sufficient structural strength and stability to support the loads generated during equipment operation. In practical applications, the size and shape of the frame 1 can be customized according to production needs to adapt to production lines of different scales. At the end of the frame 1, a feed roller 2 is rotatably connected. The main function of the feed roller 2 is to guide the fabric to be dyed smoothly into the equipment. For example, the feed roller 2 can be a smooth metal roller connected to the frame 1 via bearings, ensuring that the fabric is not damaged or wrinkled upon entry. The fabric can be manually or automatically fed into the feed roller 2 via pretreatment equipment. A support seat 3 is provided on the side of the feed roller 2, which is fixedly connected to the frame 1. A pressure plate 4 and a drive roller 5 are further provided on the support seat 3. The combination of the pressure plate 4 and the drive roller 5 is used for preliminary pretreatment of the fabric. For example, there are two pressure plates 4 arranged in a sideways V-shape, while the drive roller 5 is driven to rotate by a motor. As the fabric passes between the pressure plates 4 and the drive roller 5, it is subjected to compression, thereby removing surface dust or initially flattening it. This simple pressing method helps improve the uniformity of the fabric surface.

[0052] A dyeing tank 6 is fixedly connected to the frame 1. This dyeing tank 6 is the core area for dyeing. For example, the dyeing tank 6 can be a double-walled stainless steel container with heat insulation function, filled with heat-insulating material to maintain the temperature of the dye liquor. The dimensions of the dyeing tank 6 should be designed to ensure that the fabric can be completely immersed in the dye liquor and that there is sufficient space for dye liquor circulation.

[0053] The dyeing box 6 is fixedly connected to a double-roller dyeing frame 7, which has two synchronously rotating dip rollers 14 rotatably connected inside. These two dip rollers 14 are key components for ensuring full contact between the fabric and the dye liquor. For example, these two dip rollers 14 can be made of corrosion-resistant materials and rotate synchronously through gear or chain drive to ensure that the fabric is evenly immersed in the dye liquor as it passes through.

[0054] A drive assembly 8 is provided between the twin-roll dyeing rack 7 and the drive roller 5. This drive assembly 8 is responsible for providing power to multiple moving parts of the equipment. For example, the drive assembly 8 can be an independent motor that transmits power to the drive roller 5 and the dip roller 14 inside the twin-roll dyeing rack 7 via a belt or chain, so as to achieve coordinated movement of the various parts.

[0055] The side of the double-roller dyeing rack 7 is provided with a drain rack 9, which is fixedly connected to the dyeing box 6. The drain rack 9 is used to remove excess dye from the fabric. For example, the drain rack 9 is a support that is higher than the dyeing box 6, and the fabric forms an inclined slope from the dyeing box 6 to the drain rack 9, so that the excess dye on the fabric flows back into the dyeing box 6 under the action of gravity.

[0056] A conveyor roller assembly 10 is provided on the side of the dyeing box 6, and this conveyor roller assembly 10 is rotatably connected to the frame 1. This conveyor roller assembly 10 is responsible for smoothly conveying the drained fabric to the next stage. For example, the conveyor roller assembly 10 can be composed of multiple independent rollers, each roller being connected to the frame 1 via bearings and driven by an independent motor or centralized transmission system to maintain the tension of the fabric.

[0057] The conveying roller assembly 10 has a discharge roller 11 on its side, which is rotatably connected to the frame 1. The discharge roller 11 is the final outlet for the fabric as it leaves the equipment. For example, the discharge roller 11 can be a guide roller similar to the feeding roller 2 to ensure that the fabric remains flat when leaving the equipment.

[0058] The discharge roller 11 has a movable roller frame 12 on its side. The movable roller frame 12 is used to support the fabric winding and subsequent stationary processes. For example, the movable roller frame 12 can be a simple adjustable bracket, whose position can be manually adjusted to accommodate fabrics of different thicknesses or widths.

[0059] The dyeing chamber 6 is equipped with a filter plate 13, which is located below the double-roller dyeing frame 7. The main function of the filter plate 13 is to filter impurities in the dye liquor. For example, the filter plate 13 can be a porous plate or filter screen, used to intercept fiber debris, dust or other particulate matter in the dye liquor, preventing these impurities from re-adhering to the fabric and affecting the dyeing quality.

[0060] Above the dip roller 14 is a dye roller 15, above which is a dispensing roller 16, and above which is a dye liquor box 17. The dye liquor box 17 is fixedly connected to an inlet pipe 18, which communicates with the bottom of the dye tank. This series of components constitutes a dye liquor supply and circulation system. For example, the dye liquor box 17 can be an open container. The dispensing roller 16 dips into the dye liquor box 17 and transfers it to the fabric. Simultaneously, the dispensing roller 16 controls the amount of dye applied. The dispensing roller 16 and the dip roller act on different fabric surfaces, thus ensuring uniform dye application on both sides of the fabric. The inlet pipe 18 pumps the dye liquor from the bottom of the dye tank to the dye liquor box 17, forming a simple dye liquor circulation loop.

[0061] This equipment utilizes the coordinated action of the feeding roller 2, pressure plate 4, and drive roller 5 to remove impurities and flatten the fabric before it enters the dyeing chamber 6. For low-temperature dyeing, this significantly reduces the interference of residual impurities on the fabric surface on the initial uniformity of dye adsorption, thus preventing color variations and spots. Furthermore, the dye liquor circulation system within the dyeing chamber 6, consisting of the double-roller dyeing rack 7, immersion roller 14, dye roller 15, liquid outlet roller 16, dye liquor box 17, and inlet pipe 18, ensures a continuous, uniform, and clean supply of dye liquor. The filter plate 13 further guarantees the purity of the dye liquor, preventing impurities from affecting the dyeing quality. This dye liquor management and fabric immersion mechanism allows the dye to penetrate the polyester fibers evenly and fully at low temperatures, overcoming the drawbacks of difficult dye uptake and poor color fastness in traditional low-temperature dyeing. The design of the drain rack 9 and the conveying roller group 10 ensures stable fabric transport and removal of residual liquid after dyeing, further optimizing the dyeing effect and improving production efficiency.

[0062] Furthermore, this application utilizes the first pulley 801 in the drive assembly 8 as a power source to effectively distribute power to multiple key components. Specifically, the first pulley 801 is coaxially fixedly connected to the stirring roller, enabling the stirring roller to rotate synchronously with the first pulley 801. The stirring roller is cleverly positioned below the filter plate 13 inside the dyeing tank 6. When it rotates, it continuously and thoroughly agitates the dye liquor at the bottom of the dyeing tank 6, effectively preventing dye particle sedimentation and promoting uniform mixing of the dye liquor, thereby ensuring that the dye liquor concentration remains consistent throughout the dyeing tank 6. Simultaneously, the first pulley 801, through the first connecting belt 805, cooperates with the second pulleys 804 on the immersion roller 14 and the discharge roller 16 to transmit power to the immersion roller 14 and the discharge roller 16, ensuring that they can rotate synchronously, thereby achieving stable immersion of the fabric in the dye liquor and uniform discharge of the dye liquor. Furthermore, the first pulley 801, through a third pulley 806 fixedly connected thereto, cooperates with the third pulley 806 on the transmission roller 5 via a second connecting belt 807, transmitting power to the transmission roller 5. This multi-path power transmission mechanism allows the drive assembly 8 to not only drive the agitation of the dye liquor but also to coordinate the immersion roller 14, the discharge roller 16, and the transmission roller 5, forming a coordinated dye liquor treatment and fabric conveying system. In this way, the dye liquor remains dynamically uniform within the dyeing tank 6, enabling the fabric to achieve more uniform dye absorption during the dyeing process, significantly improving the stability and consistency of the dyeing effect, and optimizing the dye recycling efficiency.

[0063] A bevel gear set 808, consisting of a pair of straight bevel gears 808, is installed inside the support base 3. One bevel gear is fixedly connected to the axis of the transmission roller 5, while the axis of the other bevel gear is perpendicular to the axis of the transmission roller 5 and coaxial with the axis of the cylindrical cam 809. The cylindrical cam 809 can be made of surface-hardened alloy steel, and its outer surface is machined with a helical guide groove 810 with a specific pitch. The connecting pin 811 is tightly fitted with the inner wall of the guide groove 810, and the connecting pin 811 is rotatably connected to the sliding sleeve 812 to reduce friction and improve the smoothness of movement. The sliding sleeve 812 is a cylinder made of wear-resistant engineering plastic, whose inner hole is slidably fitted with the outer diameter of the connecting pin 811, and whose outer surface is fixedly connected to the guide rod 813 by bolts. The guide rod 813 can be a precision-ground stainless steel rod, one end of which is inserted into the sliding sleeve 812 and fixed, and the other end is fixed to the back of the pressure plate 4 by welding or threaded connection. The bottom of the pressure plate 4 can be covered with a layer of highly elastic, wear-resistant rubber pad to ensure that even and gentle pressure is applied to the fabric while avoiding damage to the fabric.

[0064] When the drive roller 5 rotates, it drives the cylindrical cam 809 to rotate synchronously via the bevel gear set 808 fixedly connected to it. The rotation of the cylindrical cam 809 causes the connecting pin 811 to slide within the guide groove 810. Due to the specific shape design of the guide groove 810, the sliding motion of the connecting pin 811 is precisely converted into reciprocating motion along the axial direction of the cylindrical cam 809. The reciprocating motion of the connecting pin 811 is transmitted to the guide rod 813 through the sliding sleeve 812, which in turn drives the pressure plate 4 fixedly connected to the guide rod 813 to perform left and right reciprocating motion. Through this mechanical linkage mechanism, the pressure plate 4 can achieve preset periodic or non-periodic lifting motion according to the design of the guide groove 810 of the cylindrical cam 809, thereby applying dynamic and controllable pressure to the passing fabric. This design synchronizes the movement of the pressure plate 4 with the fabric conveying speed, ensuring that the fabric can undergo precise impurity removal and flattening treatment according to process requirements when passing through the area of ​​the pressure plate 4.

[0065] The rotational motion of the drive roller 5 is precisely converted into the reciprocating motion of the pressure plate 4 through the linkage of the bevel gear set 808, cylindrical cam 809, connecting pin 811, sliding sleeve 812, and guide rod 813. The automated, periodic, or controllable reciprocating motion of the pressure plate 4 ensures that the fabric can be fully and consistently cleaned and flattened before entering the dyeing box 6, thereby significantly improving dyeing quality and uniformity, reducing the defect rate caused by improper flattening, and enhancing the automation level and adaptability of the equipment.

[0066] The aforementioned low-temperature environmentally friendly dyeing equipment for polyester fabrics is further proposed. The guide groove 810 includes a first slide groove 8101 and a second slide groove 8102. The first slide groove 8101 is a spiral groove. A tension spring 19 is fitted onto the connecting pin 811. A connecting block 20 is fixedly connected to the guide rod 813. A fixing bolt is installed between the pressure plate 4 and the connecting block 20. The pressure plate 4 has a key-shaped hole 21. A first spring 22 is sleeved on the guide rod 813. Specifically, the guide groove 810 is designed to include the first slide groove 8101 and the second slide groove 8102. This structure allows the function of the guide groove 810 to be subdivided. For example, the first slide groove 8101 can undertake the main motion trajectory guidance function, while the second slide groove 8102 can be used for auxiliary positioning, limiting, or providing specific motion stages. This can be achieved by machining two interconnected grooves on the surface of the cylindrical cam 809. The first groove 8101 is designed as a helical groove. This helical structure effectively converts the rotational motion of the cylindrical cam 809 into the axial reciprocating motion of the connecting pin 811, thereby driving the pressure plate 4 to move left and right. The lateral span of the first groove 8101 is one pitch. The second groove 8102 is a straight groove, with both ends connected to the two ends of the first groove 8101. The bottom of the second groove 8102 has an inner wedge-shaped surface, and the groove depth of the first groove 8101 is not constant. A tension spring 19 is fitted onto the connecting pin 811, providing a continuous preload or reset force. This helps ensure that the connecting pin 811 remains in close contact with the groove wall as it moves within the guide groove 810, reducing gaps and thus improving the smoothness and accuracy of the movement. A tension spring 19 can be installed at one end of the connecting pin 811 and fixed to the sliding sleeve 812 to provide the required tension. A connecting block 20 is fixedly connected to the guide rod 813. The connecting block 20 serves as an intermediate connector between the guide rod 813 and the pressure plate 4, facilitating a secure connection and potentially providing additional structural support or adjustment space. The connecting block 20 can be a solid block welded to the guide rod 813 or detachably fixed to the guide rod 813 via threads, pins, or other means. Fixing bolts are installed between the pressure plate 4 and the connecting block 20 to reliably connect them, ensuring that the pressure plate 4 does not loosen or detach during movement, thus guaranteeing its operational stability. The fixing bolts can be ordinary machine bolts, tightened with nuts; or they can be socket head cap screws, countersunk bolts, etc., selected according to the specific installation space and stress requirements. The pressure plate 4 has keyholes 21, which are typically used to mate with keys or pins to achieve relative fixation between components, while allowing sliding or adjustment in a specific direction. For example... Figure 13As shown, here, the keyhole 21 may be used to engage a fixing bolt to adjust the fixed position of the pressure plate 4 on the connecting block 20, thereby adjusting the gap between the two pressure plates 4 to match the thickness of the fabric. A first spring 22 is fitted on the guide rod 813, which is typically used to provide a restoring force. The connecting pin 811 rotates within the first groove 8101 of the drive shaft, causing the connecting pin 811 to move the guide rod 813 to the right. At this time, the connecting block 20 compresses the first spring 22. When the connecting pin 811 enters the connection between the second groove 8102 and the right side of the first groove 8101, the first spring 22 releases its elasticity, and the connecting pin 811 moves laterally along the second groove 8102 momentarily, thereby completing the reset of the guide rod 813. During the reset process, the guide rod 813 drives the pressure plate 4 to move to the left. The pressure plate 4 smooths and removes impurities from the fabric. The first spring 22 is in the form of a compression spring, sleeved on the guide rod 813, with one end abutting against the connecting block 20 and the other end abutting against the pressure plate 4 or the support structure.

[0067] This application further proposes that the feed roller 2 has a first adjusting block 23 rotatably connected to both sides, the first adjusting block 23 is threadedly connected to a first screw 24, the first screw 24 is rotatably connected to a first support rod 25, the first adjusting block 23 and the first support rod 25 are slidably connected, and the first support rod 25 is fixedly connected to the frame 1; wherein, the feed roller 2 is a roller body used to guide or support the fabric, and its position or height can be adjusted. Its function is to change the fabric path according to process requirements, such as adjusting the fabric tension, dyeing depth, or gap with adjacent components. The feed roller 2 can be a smooth metal roller, or a roller with a surface covered with rubber, silicone, or other materials to increase friction or protect the fabric. The first adjusting block 23 is a component used to connect the feed roller 2 and the adjusting mechanism, and usually has a threaded hole to cooperate with the screw to achieve linear movement of position. The first screw 24 is a rod with external threads, which, through rotation, cooperates with the internal thread of the first adjusting block 23 to convert rotational motion into linear movement of the first adjusting block 23, providing precise linear adjustment. The first support rod 25 is a support structure fixed to the frame 1, used to support the first adjusting block 23 and provide it with sliding guidance, ensuring that the first adjusting block 23 maintains a stable orientation during movement. It can be a square guide rail made of high-strength steel with a hardened or chrome-plated surface to reduce friction and wear. The frame 1 is the overall support structure of the equipment, providing a mounting base and stability for all components.

[0068] The dewatering rack 9 further includes a second support rod 901, on which a first idler roller 902 is rotatably connected. An adjusting pressure roller 903 is located above the first idler roller 902, and second adjusting blocks 904 are rotatably connected to both sides of the adjusting pressure roller 903. The second support rod 901 has a first sliding groove 8101 for the second adjusting blocks 904 to slide. A second screw 905 is threadedly connected to the second adjusting blocks 904, and the second screw 905 is rotatably connected to the second support rod 901. The second support rod 901 is the main supporting structure of the dewatering rack 9, and its function is to provide a stable installation foundation and load-bearing capacity for other components on the dewatering rack 9. The second support rod 901 can be implemented in various forms; for example, it can be a frame structure made of metal profiles (such as rectangular steel pipes or channel steel), fixed to the side of the dyeing box 6 by welding or bolting to ensure its rigidity and stability during equipment operation. The first idler roller 902 is the roller body that comes into direct contact with the fabric. Its main function is to support the fabric and assist in the initial drainage of residual dye. The surface of the first idler roller 902 usually needs to be smooth and wear-resistant to avoid damage to the fabric and ensure that the fabric can pass through smoothly. For example, the first idler roller 902 can be made of stainless steel or a metal roller with a surface coated with corrosion-resistant rubber. Its two ends are rotatably connected to the second support rod 901 through bearing seats, thereby achieving free rotation. The adjusting pressure roller 903 is located above the first idler roller 902. Its core function is to apply adjustable pressure to the passing fabric to further squeeze out the residual dye liquor in the fabric. The pressure and position of the adjusting pressure roller 903 can be adjusted according to the characteristics of the fabric and the drainage requirements. The second adjusting block 904 is a key component connecting the adjusting pressure roller 903 and the adjusting mechanism. It allows the adjusting pressure roller 903 to be adjusted in position or angle within a certain range. The second adjusting block 904 is a block structure with bearing holes and is rotatably connected to both sides of the adjusting pressure roller 903 by means of pins or other methods. A chute is a guide structure installed on the second support rod 901 to guide the second adjusting block 904 to move precisely linearly. The shape and size of the chute should match the second adjusting block 904 to ensure smooth and accurate adjustment. The second screw 905 is the actuator for driving the movement of the second adjusting block 904, achieving precise displacement control through a threaded connection. The second screw 905 can pass through the threaded hole of the second adjusting block 904, and rotating the screw controls the lifting or lateral movement of the second adjusting block 904. The rotatable connection between the second screw 905 and the second support rod 901 means that the screw itself can rotate, but its axial position relative to the second support rod 901 is fixed, thus driving the movement of the second adjusting block 904 through the threaded connection. This can be achieved by providing a bearing seat or retaining ring on the second support rod 901, allowing the second screw 905 to rotate freely without axial displacement.

[0069] This application further proposes that a second idler roller 26 is provided on the side of the dyeing box 6 and the second support rod 901. The dyeing box 6 is the core component for containing the dye liquor and performing the dyeing operation, and its internal structure is designed to ensure uniform dyeing of the fabric. The dyeing box 6 can be made of corrosion-resistant materials (such as stainless steel or polymer composites), and its interior can be equipped with guide plates or stirring devices according to process requirements to optimize the circulation and uniformity of the dye liquor. The second support rod 901 is a component of the drain rack 9, and its function is to provide stable support for the first idler roller 902 and the adjusting pressure roller 903, thereby achieving the function of initial draining of the fabric. The second support rod 901 can be constructed using high-strength metal profiles (such as aluminum alloy or stainless steel square tubing) to ensure its structural stability and load-bearing capacity in humid and hot environments. The second idler roller 26 is a newly added component, whose main function is to provide additional support and guidance for the fabric passing through the drain rack 9. The second idler roller 26 can be a smooth, wear-resistant roller, such as made of polyurethane, silicone rubber, or polished stainless steel, to reduce frictional damage to the fabric. Its rotation method can be free rotation or it can be connected to a fixed structure through bearings to ensure that it can respond flexibly when the fabric passes through.

[0070] The present application further proposes that a collection groove 27 is provided on the frame 1. The material conveying roller group 10 includes an upper roller body 1001 and a lower roller body 1002. The lower roller body 1002 is rotatably connected to the collection groove 27. The upper roller bodies 1001 are arranged in a pin-shaped pattern. The upper roller bodies 1001 are rotatably connected to a mounting seat, and the mounting seat is fixedly connected to the frame 1. Among them, the collection groove 27 is a container structure provided on the frame 1, and its main function is to collect the residual dyeing liquid or cleaning liquid dripping from the fabric, preventing it from splashing onto other areas of the equipment or the ground. The collection groove 27 can be designed in various shapes, such as a U-shaped groove, a V-shaped groove or a rectangular groove, and usually a drain port is provided at its bottom to drain or recycle the collected liquid. The material of the collection groove 27 is usually selected as a corrosion-resistant material, such as stainless steel or a polymer, to adapt to the chemical properties of the dyeing liquid. The material conveying roller group 10 includes an upper roller body 1001 and a lower roller body 1002 for clamping and conveying the fabric. The upper roller body 1001 and the lower roller body 1002 are usually made of materials with certain elasticity and friction, such as rubber, silica gel or polyurethane, to ensure stable clamping and effective conveying of the fabric, while avoiding damaging the fabric. This configuration of the upper and lower roller bodies 1002 can exert a certain pressure on the fabric, helping to further extrude the residual liquid and keeping the fabric flat. The lower roller body 1002 and the collection groove 27 are connected through a rotational connection mechanism, enabling the lower roller body 1002 to rotate freely to convey the fabric. This connection method can be fixed by a bearing seat on the inner wall or side wall of the collection groove 27, or the bearing seat can be installed above the collection groove 27 through a bracket, ensuring that the lower roller body 1002 rotates above or inside the collection groove 27. This structure enables the lower roller body 1002 to directly guide the liquid dripping from the fabric into the collection groove 27 below while conveying the fabric. The upper roller bodies 1001 are arranged in a pin-shaped pattern, meaning that above the lower roller body 1002, at least two upper roller bodies 1001 are arranged in a staggered or symmetrical manner, forming a structure similar to the Chinese character "pin". For example, two upper roller bodies 1001 can be arranged above one lower roller body 1002, so that the fabric is subjected to multi-point contact and uniform pressure when passing through. This arrangement can more effectively compact and flatten the fabric, further extrude the residual dyeing liquid, and ensure the stability of the fabric during conveying, preventing it from running off or wrinkling. The upper roller body 1001 is connected to the mounting seat through a rotational connection mechanism, enabling the upper roller body 1001 to rotate freely. The mounting seat is a structural member for fixing the upper roller body 1001, usually made of a metal material, such as steel or aluminum alloy. The mounting seat can be designed as a structure with adjustable height or position to adjust the gap and pressure between the upper roller body 1001 and the lower roller body 1002 according to the thickness of the fabric or the process requirements. The mounting seat and the frame 1 are fixedly connected, such as by bolts, welding or riveting, etc.This fixed connection ensures the stability and rigidity of the overall structure of the material conveying roller group 10, enabling it to withstand the load and pressure of fabric conveying during equipment operation and ensuring long-term stable operation of the equipment.

[0071] The solution proposed in this application solves the problem of residual dye liquor dripping after the fabric is drained by setting a collection trough 27 on the frame 1 and optimizing the design of the conveying roller group 10. This solution not only achieves stable fabric conveying, but more importantly, it effectively collects residual dye liquor, avoids waste of dye liquor and environmental pollution, thereby improving the environmental performance and operating efficiency of the entire dyeing equipment.

[0072] This application further proposes that the discharge roller 11 is rotatably connected to a third support rod 28, the third support rod 28 is hinged to the frame 1, and a telescopic rod 29 is hinged between the third support rod 28 and the frame 1. The third support rod 28 is provided with an adjusting groove, and a third adjusting block 31 is slidably connected within the adjusting groove. A second spring 32 is provided on the side of the third adjusting block 31, and an elastic pressure roller 33 is hinged to the third adjusting block 31. A third support roller 34 is provided on the side of the elastic pressure roller 33. The third support rod 28 is a structural component for supporting and positioning the discharge roller 11. It can be, for example, a metal rod or a composite material rod, providing a movable support point for the discharge roller 11, allowing it to swing or adjust around a certain axis. A hinge is a connection method that allows relative rotation between two components, for example, through a pin or ball joint, providing a swingable base point for the third support rod 28. The telescopic rod 29 is a rod-shaped structure with adjustable length, typically composed of multiple sleeves. Its length is extended or retracted through an internal mechanism, providing variable support length to indirectly adjust the swing angle or position of the third support rod 28. The adjusting groove is a groove with a specific shape used to guide and restrict the sliding movement of the third adjusting block 31. For example, it can be designed as a straight line to ensure stable sliding in a specific direction. The third adjusting block 31 is a component used for connecting, supporting, or transmitting force. Its function is to slide within the adjusting groove and act as an intermediate component connecting the second spring 32 and the elastic pressure roller 33. The second spring 32 is an elastic element capable of storing and releasing mechanical energy, such as a coil spring or leaf spring. Its function is to provide elastic force for buffering, resetting, or applying continuous pressure. The elastic pressure roller 33 is a roller with a certain degree of elasticity, typically constructed by covering a rigid mandrel with elastic materials such as rubber or polyurethane. Its function is to provide flexible pressure when in contact with the fabric to adapt to changes in fabric thickness and avoid damaging the fabric. The third idler roller 34 is a cylindrical component, made of metal or plastic, used to support and guide the movement of the fabric. Its function is to work in conjunction with the elastic pressure roller 33 to apply pressure to the fabric or guide it. The coordinated action of the telescopic rod 29, the third support rod 28, the second chute 8102, the third adjusting block 31, the second spring 32, the elastic pressure roller 33, and the third idler roller 34 constitutes an adjustable, buffered discharge pressing and guiding mechanism, ensuring smooth and high-quality fabric processing during the discharge stage.

[0073] The overall process flow of this application: The solution of this application decomposes the fabric processing into a series of orderly and interrelated steps, and makes full use of the various functional components of the dyeing equipment to achieve low-temperature and environmentally friendly dyeing of polyester fabrics. First, the fabric enters the equipment under the guidance of the feed roller 2 and is pre-treated by two sets of pressure plates 4. This pre-treatment step can effectively remove impurities from the fabric surface and flatten it, laying the foundation for subsequent uniform dyeing. Subsequently, the flattened fabric is introduced into the dyeing box 6, where it is fully immersed in the circulating dye solution provided by the dye box 17 and the inlet pipe 18 between the immersion roller 14 and the dye roller 15 in the double roller dyeing frame 7. This immersion method ensures that the dye solution can penetrate into the fabric fibers evenly and efficiently. After immersion, the fabric passes through the drain rack 9 to drain excess dye solution from the surface, which not only reduces dye waste but also reduces energy consumption in subsequent processing. Finally, the conveying roller group 10 and the discharge roller 11 work together to ensure that the dyed and drained fabric can be smoothly and continuously conveyed out of the equipment, completing the entire dyeing process. The entire process is interconnected, with each step working closely together to maximize the utilization of the equipment's capabilities, thereby achieving efficient, uniform, and environmentally friendly low-temperature dyeing of polyester fabrics.

[0074] In actual operation, the fabric can move continuously along the feed roller 2 towards the discharge roller 11 at a speed of 10 meters per minute. After passing the feed roller 2, the two sets of pressure plates 4 can use rollers with wear-resistant rubber coatings to apply a pressure of about 1.2 MPa to the middle of the fabric. While flattening the fabric, the micro-friction of the roller surface removes loose fibers and fine impurities from the fabric surface. After being pressed and shaped, the fabric is smoothly introduced into the dyeing box 6 by the drive roller 5. Inside the dyeing box 6, the two dip rollers 14 and the dye roller 15 operate at synchronous speeds. The dye liquor in the dye liquor box 17 is continuously supplied through the inlet pipe 18 and is evenly coated onto the dye roller 15 by the outlet roller 16, and then transferred to the fabric on the dip roller 14, ensuring that the fabric is evenly immersed in the dye liquor at 65°C. After impregnation, the fabric passes through a drain rack 9, which can be constructed of inclined PTFE plates with a smooth surface and guide grooves to allow excess dye liquor to quickly flow back to the dye liquor recovery system. Subsequently, the fabric is smoothly conveyed by a conveyor roller assembly 10, which consists of three independently driven polyurethane rollers. The rotation speed is adjusted in real time by a tension sensor to ensure the fabric maintains constant tension during conveying. Finally, the fabric is discharged by a discharge roller 11 and can be directly sent to the drying or winding process.

[0075] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A low-temperature environmentally friendly dyeing equipment for polyester fabrics, characterized in that: The machine includes a frame (1), with a feed roller (2) rotatably connected to the end of the frame (1). A support seat (3) is provided on the side of the feed roller (2). A pressure plate (4) and a drive roller (5) are provided on the support seat (3). The support seat (3) is fixedly connected to the frame (1). A dyeing box (6) is fixedly connected to the frame (1). A double-roller dyeing frame (7) is fixedly connected to the dyeing box (6). A drive assembly is provided between the double-roller dyeing frame (7) and the drive roller (5). 8) The double roller dyeing rack (7) is provided with a drain rack (9) on the side. The drain rack (9) is fixedly connected to the dyeing box (6). The dyeing box (6) is provided with a material conveying roller group (10) on the side. The material conveying roller group (10) is rotatably connected to the machine frame (1). The material conveying roller group (10) is provided with a discharge roller (11) on the side. The discharge roller (11) is rotatably connected to the machine frame (1). The discharge roller (11) is provided with a movable roller frame (12) on the side. The dyeing box (6) is equipped with a filter plate (13). The double roller dyeing frame (7) is located above the filter plate (13). The double roller dyeing frame (7) is rotatably connected to two synchronously rotating dip rollers (14). A dye roller (15) is provided above the two feed rollers (2). An outlet roller (16) is provided above the dye roller (15). A dye liquor box (17) is provided above the outlet roller (16). An inlet pipe (18) is fixedly connected to the dye box (17). The inlet pipe (18) is connected to the bottom of the dye box.

2. The low-temperature environmentally friendly dyeing equipment for polyester fabrics according to claim 1, characterized in that: The drive assembly (8) includes a first pulley (801), a stirring roller is coaxially fixedly connected to the first pulley (801), the stirring roller is rotatably connected to the dyeing box (6), the stirring roller is located below the filter plate (13), a second pulley (804) is fixedly connected to both the soaking roller (14) and the liquid discharge roller (16), a first connecting belt (805) is fitted between the first pulley (801) and the second pulley (804), a third pulley (806) is fixedly connected to both the first pulley (801) and the transmission roller (5), and a second connecting belt (807) is fitted between the two third pulleys (806).

3. The low-temperature environmentally friendly dyeing equipment for polyester fabrics according to claim 2, characterized in that: A bevel gear set (808) is rotatably connected inside the support base (3). The bevel gear set (808) is fixedly connected to the transmission roller (5). A cylindrical cam (809) is fixedly connected to the bevel gear set (808). A guide groove (810) is provided on the cylindrical cam (809). A connecting pin (811) is slidably connected inside the guide groove (810). A sliding sleeve (812) is slidably connected to the connecting pin (811). A guide rod (813) is fixedly connected to the sliding sleeve (812). The guide rod (813) is fixedly connected to the pressure plate (4).

4. The low-temperature environmentally friendly dyeing equipment for polyester fabrics according to claim 3, characterized in that: The guide groove (810) includes a first slide groove (8101) and a second slide groove (8102). The first slide groove (8101) is a spiral groove. A tension spring (19) is fitted on the connecting pin (811). A connecting block (20) is fixedly connected to the guide rod (813). A fixing bolt is installed between the pressure plate (4) and the connecting block (20). A key hole (21) is provided on the pressure plate (4). A first spring (22) is sleeved on the guide rod (813).

5. The low-temperature environmentally friendly dyeing equipment for polyester fabrics according to claim 1, characterized in that: The feed roller (2) is rotatably connected to two sides of a first adjusting block (23), the first adjusting block (23) is threadedly connected to a first screw (24), the first screw (24) is rotatably connected to a first support rod (25), the first adjusting block (23) is slidably connected to the first support rod (25), and the first support rod (25) is fixedly connected to the frame (1).

6. The low-temperature environmentally friendly dyeing equipment for polyester fabrics according to claim 1, characterized in that: The drain rack (9) includes a second support rod (901), a first roller (902) is rotatably connected to the second support rod (901), an adjusting pressure roller (903) is provided above the first roller (902), and second adjusting blocks (904) are rotatably connected to both sides of the adjusting pressure roller (903). The second support rod (901) is provided with a sliding groove for the second adjusting block (904) to slide, and a second screw (905) is threadedly connected to the second adjusting block (904). The second screw (905) is rotatably connected to the second support rod (901).

7. The low-temperature environmentally friendly dyeing equipment for polyester fabrics according to claim 6, characterized in that: The dyeing box (6) and the second support rod (901) are provided with a second roller (26) on the side.

8. The low-temperature environmentally friendly dyeing equipment for polyester fabrics according to claim 1, characterized in that: The frame (1) is provided with a collection trough (27). The material conveying roller group (10) includes an upper roller body (1001) and a lower roller body (1002). The lower roller body (1002) is rotatably connected to the collection trough (27). The upper roller bodies (1001) are arranged in a triangular shape. The upper roller body (1001) is rotatably connected to a mounting base. The mounting base is fixedly connected to the frame (1).

9. The low-temperature environmentally friendly dyeing equipment for polyester fabrics according to claim 1, characterized in that: The discharge roller (11) is rotatably connected to a third support rod (28), the third support rod (28) is hinged to the frame (1), and a telescopic rod (29) is hinged between the third support rod (28) and the frame (1). An adjustment groove (30) is provided on the third support rod (28), and a third adjustment block (31) is slidably connected in the adjustment groove (30). A second spring (32) is provided on the side of the third adjustment block (31), and an elastic pressure roller (33) is hinged on the third adjustment block (31). A third support roller (34) is provided on the side of the elastic pressure roller (33).

10. A low-temperature environmentally friendly dyeing process for polyester fabrics, characterized in that: The fabric moves along the feed roller (2) toward the discharge roller (11). After passing the feed roller (2), the two sets of pressure plates (4) remove impurities and flatten the middle part of the fabric. After being pressed, the fabric enters the dyeing box (6) and is evenly immersed in the circulating dye liquor between the two sets of soaking rollers (14) and dye rollers (15). Then, the excess liquid is drained by the drain rack (9), and then it is smoothly transported by the conveying roller group (10) and finally discharged by the discharge roller (11).

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