Production equipment and production process of polyester fiber special for sports clothes

Abstract

The application provides a polyester fiber production equipment and production process special for sports clothes, and relates to the technical field of fiber spinning. The polyester fiber production equipment and production process special for sports clothes comprises a feeding device, a spinning box, a spinneret, a water cooling device, a circular blowing air cooling device, an oiling device and a winding device. The spiral groove fiber structure is formed by the rotary spinning, the capillary effect of the spiral groove is used to enhance the moisture conducting efficiency, the traditional post-finishing moisture absorption and sweat releasing additives are replaced, the functional attenuation problem caused by washing is fundamentally solved, the problem of poor moisture absorption and heat conducting efficiency of the straight groove is solved, the heat insulation shell and the water cooling structure are cooperatively designed, the heat insulation rotating roller blocks the high temperature conduction of the spinning, the heat exchange coil directly cools the operation environment of the servo motor, the double protection ensures the stability of the driving system under the high temperature working condition, and the spiral pipe accurately controls the fiber groove forming quality.

Description

Technical Field

[0001] This invention relates to the field of fiber spinning technology, specifically to a production equipment and process for producing polyester fibers for sportswear. Background Technology

[0002] With continuous social development and progress, people are paying more and more attention to sports, and sportswear is mainly clothing worn during physical or outdoor activities. Because athletes sweat a lot during exercise, sportswear must have excellent moisture-wicking and quick-drying properties, meaning that sweat produced by the body must quickly transfer from the skin to the back layer and evaporate rapidly, keeping the skin dry and comfortable. At the same time, as outdoor clothing, its UV protection performance is also crucial, especially for athletes in the high-altitude northwest. Currently, the method of giving sports fabrics UV protection and moisture-wicking properties involves using fibers with a grooved structure and applying UV-reducing and moisture-wicking finishing agents to the fabric, allowing these agents to adhere to the fabric. This method significantly reduces the difficulty of fabric production. However, the content of UV-reducing and moisture-wicking agents in sports fabrics produced by this method decreases with repeated washing, weakening the fabric's UV protection and moisture-wicking properties. Therefore, there is still room for improvement.

[0003] To this end, a publicly disclosed technology proposes a production process for a multifunctional outdoor sports fabric (Chinese Patent Publication No. CN115045126B), including the following steps: S1: Fabric weaving: 20%-30% by weight of CTATEX polyester fiber, 51%-62% of Coolmax fiber, and 18%-20% of TEMPSENSE fiber are blended and woven into a combed fabric; S2: Singeing; S3: Descaling and bleaching; S4: Mercerizing; S5: Dyeing: The fabric treated in S4 is dyed with reactive dyes; simultaneously, UV-resistant auxiliaries and moisture-wicking auxiliaries are added to the dye bath; S6: Color fixing; S7: Finishing, to obtain the finished multifunctional outdoor sports fabric. This disclosed technology improves the washability of sports fabrics, giving them better UV resistance and moisture-wicking properties.

[0004] However, while the aforementioned disclosed textile control methods improve the moisture-wicking properties of sports fabrics, these properties are still gradually lost due to washing. Furthermore, the existing groove structures are all straight grooves, meaning their length direction is parallel to the fiber length direction, resulting in limited moisture-wicking effects and little practical improvement for sports fabrics. Therefore, it is necessary to develop a special polyester fiber production equipment and process for sportswear to solve the problem of functional durability from the fiber's origin. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a production equipment and process for producing polyester fibers specifically for sportswear, which solves the problem that existing polyester fibers for sportswear have poor moisture absorption and wicking properties and are not washable.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a production equipment for polyester fibers specifically designed for sportswear, comprising a feeding device, a spinning box, a spinneret, a water cooling device, an annular air cooling device, an oiling device, and a winding device. The spinneret is fixedly connected to the lower wall of the spinning box. The spinneret is composed of an upper plate, a middle plate, and a lower plate arranged sequentially from top to bottom. The upper plate has a settling groove on its upper wall, and an annular groove is provided on the lower inner wall of the settling groove. Multiple sets of liquid guiding pipes are fixedly connected through the lower inner wall of the annular groove, with the upper ends of the liquid guiding pipes flush with the lower inner wall of the annular groove. Multiple sets of... A mounting cavity is provided. The lower end of the liquid guide tube penetrates the inner wall of the upper plate and extends toward the interior of the first mounting cavity. A rotating tube is rotatably connected to the outer wall of the end of the liquid guide tube that extends into the interior of the first mounting cavity. A connecting countersunk hole is provided on the upper wall of the rotating tube. The lower end of the liquid guide tube is rotatably connected to the inner wall of the connecting countersunk hole. A step is provided at the lower end of the rotating tube. The end of the step away from the rotating tube penetrates the lower wall of the lower plate and passes through the lower side of the lower plate. A rotating drive structure for driving the rotating tube to rotate is provided inside the middle plate. A water cooling structure for dissipating heat from the rotating drive structure is provided inside the middle plate. The water cooling structure is connected to a water cooling device.

[0007] Preferably, the lower end of the liquid guide tube is rotatably connected to the lower inner wall of the connecting countersunk hole via a first bearing, and the outer wall of the liquid guide tube is rotatably sealed to the inner wall of the connecting countersunk hole via a sealing element. A second bearing is provided between the lower end of the rotating tube and the outer wall of the step. A butterfly spring is provided between the lower wall of the second bearing and the upper wall of the lower plate. The butterfly spring has a double-wave structure with a wave height of 0.8 mm. The inner wall of the liquid guide tube is provided with a liquid guide hole that runs vertically through the tube. The rotating tube is provided with a conical hole that runs through the lower wall of the connecting countersunk hole. The lower wall of the conical hole is provided with a spinneret hole that runs through the lower end of the step. The length-to-diameter ratio of the spinneret hole is 5:1. The inner wall of the spinneret hole is provided with multiple sets of straight edges for forming grooves on the outer wall of the ejected filament bundle. The multiple sets of straight edges are evenly distributed circumferentially around the axis of the spinneret hole. The lower edge of the spinneret hole is provided with a rounded chamfer.

[0008] The dual-bearing layout (first bearing and second bearing) defines the position of the rotating tube axis, ensuring rotational concentricity and preventing inconsistent groove depth caused by spinneret eccentricity.

[0009] The butterfly spring applies a constant axial preload to the second bearing to compensate for the thermal expansion difference between the rotating tube and the liquid guide tube at high temperatures; the double waveform structure makes the spring stiffness change non-linearly, and it can adapt to micron-level displacement within the preload range, avoiding hard extrusion that causes the bearing coating to peel off.

[0010] The spinneret with a length-to-diameter ratio of 5:1 provides sufficient shearing action, causing the melt molecular chains to orient along the extrusion direction; the straight edges carve equally divided grooves on the fiber surface, which, together with the circumferential rotation of the rotating tube, form a spiral trajectory; the rounded chamfers eliminate stress concentration at the orifice and prevent fiber breakage.

[0011] Preferably, a second mounting cavity is provided on the lower wall of the middle plate body and on the side of the first mounting cavity away from the axis of the middle plate body. A heat insulation shell is fixedly connected to the inner side wall of the second mounting cavity. A heat insulation roller is rotatably connected to the upper wall of the heat insulation shell in a through-hole manner. The heat insulation roller is a 42CrMo alloy steel substrate covered with an Al2O3 modified silicone heat insulation layer. A transmission structure for transmission is provided between the heat insulation roller and the outer wall of the rotating tube. The rotation drive structure is located inside the heat insulation shell. The water cooling structure is located between the heat insulation shell and the middle plate body.

[0012] The combination of 42CrMo alloy steel and Al2O3 modified silicone insulation layer can effectively prevent heat transfer to the servo motor and avoid aging of the servo motor insulation layer.

[0013] Preferably, the rotary drive structure includes a partition and a servo motor. The partition is fixedly connected to the inner wall of the heat insulation shell, and the servo motor is fixedly connected to the lower wall of the partition. The servo motor's extension shaft passes through the inner wall of the partition and is fixedly connected to one end of the heat insulation roller that extends into the heat insulation shell via a coupling.

[0014] By setting a servo motor, the rotation speed of the rotating tube can be precisely controlled to form high-precision spiral grooves on the fiber surface.

[0015] Preferably, the water-cooling structure includes a heat exchange coil, an outlet pipe, and an inlet pipe. A water passage is provided on the lower wall of the middle plate. One end of the water passage penetrates the outer circumferential wall of the middle plate. A plug is fixedly connected to the inner side wall of the water passage near the outer circumferential wall of the middle plate. The outlet pipe and the inlet pipe are fixedly connected inside the plug in a through-hole configuration. The ends of the outlet pipe and the inlet pipe extending out of the middle plate are both connected to the water-cooling device. The ends of the outlet pipe and the inlet pipe away from the water-cooling device both penetrate the outer wall of the insulation shell and extend into the interior of the insulation shell. The heat exchange coil is fixedly connected between the ends of the outlet pipe and the inlet pipe that extend into the interior of the insulation shell.

[0016] Cooling medium flows into the heat exchange coil from the inlet pipe, absorbs the heat generated by the servo motor, and then flows back to the water cooling device through the outlet pipe. The servo motor's operating temperature is maintained through circulating water cooling heat exchange.

[0017] Preferably, both the first bearing and the second bearing are sliding bearings, and both the first bearing and the second bearing are nickel-based high-temperature alloys with a surface plasma-sprayed graphite-MoS2 composite coating.

[0018] The nickel-based superalloy matrix withstands high temperatures of the melt (>280℃), and the graphite-MoS2 composite coating provides high-temperature self-lubrication, preventing carbonized particles from the melt from jamming the bearing.

[0019] Preferably, the transmission structure includes a first gear and a second gear, which are fixedly connected to the outer wall of the heat-insulating roller and the outer wall of the rotating tube, respectively. The base of the first gear and the second gear are both made of GH4145 high-temperature alloy and the tooth surfaces are coated with CrAlN coating.

[0020] GH4145 high-temperature alloy maintains a tensile strength of ≥800MPa at 400℃, resisting gear meshing impact loads; the CrAlN coating can greatly reduce the coefficient of friction, prevent transmission jamming caused by high-temperature adhesion, and ensure that the rotational speed fluctuation of the rotating tube is <±0.5rpm.

[0021] Preferably, the outer wall of the upper plate is provided with a mounting flange, which is detachably connected to the lower wall of the spinning box by multiple sets of bolts.

[0022] Preferably, the sealing element is a graphite sealing ring.

[0023] Graphite sealing rings utilize their self-lubricating properties and high-temperature resistance (limited temperature 450℃) to maintain the sealing surface fit when the rotating tube and the liquid guide tube rotate relative to each other; compared with rubber seals, they can avoid the risk of melt leakage caused by high-temperature softening.

[0024] A production process for a polyester fiber production equipment specifically for sportswear, comprising the following steps:

[0025] S1. The polyester melt (intrinsic viscosity 0.65±0.05 dL / g) conveyed from the polymerization section is homogenized by a static mixer and then directly conveyed to the spinning box through an insulated pipeline. The melt temperature is controlled at 285±2℃. The melt is evenly distributed to each rotating tube through the liquid guiding holes of multiple sets of liquid guiding pipes in the annular groove, and the flow deviation of each liquid guiding pipe is ≤3%.

[0026] S2. Dynamic spinning and forming: The servo motor drives the heat-insulating roller to rotate at 800-1500 rpm. The first gear and the second gear drive the rotating tube to rotate synchronously. After the melt is pressurized again through the conical hole, it is sent into the spinneret hole. The straight edges make the fiber surface form a groove structure. After the melt is ejected through the spinneret hole, it forms a fiber with a spiral groove structure on the surface.

[0027] S3. Cooling and shaping: The nascent fibers are cooled by a ring blower.

[0028] S4. Fiber post-treatment: After cooling, the fiber bundle is given an antistatic agent by an oiling device with an oil concentration of 10±1%, and then collected by a winding device.

[0029] This invention provides a production equipment and process for producing polyester fibers specifically for sportswear. It offers the following advantages:

[0030] 1. Compared with existing technologies, the production equipment and process for producing polyester fibers for sportswear uses a spiral groove fiber structure formed by rotary spinning. The capillary effect of the spiral groove enhances the moisture-wicking efficiency, replacing traditional finishing moisture-wicking agents. This fundamentally solves the problem of functional degradation caused by washing, while also addressing the issue of poor moisture absorption and heat conduction efficiency of straight grooves.

[0031] 2. Compared with existing technologies, the production equipment and process for polyester fibers for sportswear adopts a design that combines a heat-insulating shell and a water-cooling structure: the heat-insulating rollers block the high-temperature conduction of spinning, and the heat exchange coils directly cool the operating environment of the servo motor. This dual protection ensures the stability of the drive system under high-temperature conditions, thereby ensuring the precise control of the rotating tube to form the fiber grooves. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the spinneret structure of the present invention;

[0033] Figure 2 For the present invention Figure 1 A magnified view of a section at point A in the middle;

[0034] Figure 3 This is a partial cross-sectional view of the internal structure of the spinneret of the present invention;

[0035] Figure 4 For the present invention Figure 3 A magnified view of a section at point B in the middle;

[0036] Figure 5 For the present invention Figure 3 A magnified view of a section at point C;

[0037] Figure 6 For the present invention Figure 3 A magnified view of a section at point D;

[0038] Figure 7 This is a bottom view of the plate structure in this invention;

[0039] Figure 8 This is a cross-sectional view of the rotating tube structure of the present invention;

[0040] Figure 9This is a schematic diagram of the heat insulation shell structure of the present invention;

[0041] Figure 10 This is a cross-sectional view of the internal structure of the heat insulation shell of the present invention.

[0042] The components are as follows: 1. Upper plate; 2. Mounting flange; 3. Middle plate; 301. First mounting cavity; 302. Second mounting cavity; 303. Water passage; 4. Lower plate; 5. Settling tank; 6. Annular groove; 7. Liquid guide pipe; 701. Liquid guide hole; 8. Plug; 9. Water outlet pipe; 10. Water inlet pipe; 11. Coupling; 12. Rotating tube; 1201. Step; 1202. Connecting countersunk hole; 1203. Tapered hole; 1204. Spinneret hole; 1205. Straight edge; 13. First bearing; 14. Seal; 15. Second bearing; 16. Butterfly spring; 17. Heat insulation shell; 18. First gear; 19. Second gear; 20. Heat insulation roller; 21. Partition plate; 22. Servo motor; 23. Heat exchange coil. Detailed Implementation

[0043] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Example:

[0045] like Figures 1 to 10 As shown, this embodiment of the invention provides a production equipment for polyester fibers for sportswear, including a feeding device, a spinning box, a spinneret, a water cooling device, a ring air cooling device, an oiling device, and a winding device. The spinneret is fixedly connected to the lower wall of the spinning box. The spinneret is composed of an upper plate 1, a middle plate 3, and a lower plate 4 arranged sequentially from top to bottom. An installation flange 2 is provided on the outer wall of the upper plate 1. The installation flange 2 is detachably connected to the lower wall of the spinning box by multiple sets of bolts.

[0046] In order to achieve uniform distribution of spinning melt, the upper plate 1 is provided with a sinking groove 5, the lower inner wall of the sinking groove 5 is provided with an annular groove 6, and the lower inner wall of the annular groove 6 is fixedly connected with multiple sets of liquid guiding pipes 7 in a through-shaped manner. The upper end of the liquid guiding pipe 7 is flush with the lower inner wall of the annular groove 6. The inner wall of the middle plate 3 is provided with multiple sets of first mounting cavities 301, and the lower end of the liquid guiding pipe 7 penetrates the inner wall of the upper plate 1 and extends toward the interior of the first mounting cavity 301.

[0047] The settling tank 5 and the annular tank 6 form a melt buffer space, which can buffer the fluctuation of the feeding pressure; multiple sets of liquid guide pipes 7 are evenly distributed around the annular tank 6 to ensure that the melt is equally distributed to each first mounting cavity 301, avoiding the problem of uneven fiber thickness or filament breakage caused by local flow rate differences.

[0048] To achieve stable rotation of the rotating tube and isolate the heat conduction of the high-temperature melt, a rotating tube 12 is rotatably connected to the outer wall of one end of the liquid guide tube 7 that extends into the first mounting cavity 301. A connecting countersunk hole 1202 is provided on the upper wall of the rotating tube 12. The lower end of the liquid guide tube 7 is rotatably connected to the inner wall of the connecting countersunk hole 1202. The lower end of the liquid guide tube 7 is rotatably connected to the lower inner wall of the connecting countersunk hole 1202 through a first bearing 13. A step 1201 is provided at the lower end of the rotating tube 12. The end of the step 1201 away from the rotating tube 12 passes through the lower wall of the lower plate 4 and is connected to the lower side of the lower plate 4. A second bearing 15 is provided between the lower end of the rotating tube 12 and the outer wall of the step 1201. Both the first bearing 13 and the second bearing 15 are sliding bearings. Both the first bearing 13 and the second bearing 15 are nickel-based high-temperature alloys with a surface plasma-sprayed graphite-MoS2 composite coating.

[0049] The nickel-based superalloy matrix is ​​resistant to the high temperature of the melt (>280℃), and the graphite-MoS2 composite coating provides high-temperature self-lubrication to prevent the carbonized particles of the melt from jamming the bearing. The dual bearing layout (first bearing 13 and second bearing 15) limits the position of the axis of the rotating tube 12 to ensure rotational concentricity and prevent the spinneret 1204 from being eccentric, which would cause inconsistent groove depth.

[0050] In order to eliminate bearing clearance and adapt to high temperature thermal expansion, a butterfly spring 16 is provided between the lower wall of the second bearing 15 and the upper wall of the lower plate 4. The butterfly spring 16 has a double waveform structure and the waveform height is 0.8mm.

[0051] The butterfly spring 16 applies a constant axial preload to the second bearing 15 to compensate for the thermal expansion difference between the rotating tube 12 and the liquid guide tube 7 at high temperature; the double waveform structure makes the spring stiffness change nonlinearly, and can adapt to micron-level displacement within the preload range, avoiding hard extrusion that causes the bearing coating to peel off.

[0052] To prevent melt leakage and reduce rotational friction resistance, a rotational seal is formed between the outer wall of the liquid guide tube 7 and the inner wall of the connecting counterbore 1202 by a sealing element 14, which is a graphite sealing ring.

[0053] The graphite sealing ring utilizes its self-lubricating properties and high-temperature resistance (limited temperature 450℃) to maintain the sealing surface fit when the rotating tube 12 and the liquid guide tube 7 rotate relative to each other; compared with rubber seals, it can avoid the risk of melt leakage caused by high-temperature softening.

[0054] In order to form a high-precision spiral groove on the fiber surface, the inner wall of the liquid guide tube 7 is provided with a liquid guide hole 701 that runs vertically through the fiber. The inside of the rotating tube 12 is provided with a conical hole 1203 that runs through the lower wall of the connecting countersunk hole 1202. The lower wall of the conical hole 1203 is provided with a spinneret hole 1204 that runs through the lower end of the step 1201. The length-to-diameter ratio of the spinneret hole 1204 is 5:1. The inner side wall of the spinneret hole 1204 is provided with multiple sets of straight edges 1205 for forming grooves on the outer wall of the filament bundle. The multiple sets of straight edges 1205 are evenly distributed in a circle with the spinneret hole 1204 as the center. The lower edge of the spinneret hole 1204 is provided with a rounded chamfer.

[0055] The spinneret 1204 with an aspect ratio of 5:1 provides sufficient shearing action, causing the melt molecular chains to orient along the extrusion direction; the straight edge 1205 engraves equally divided grooves on the fiber surface, which, together with the circumferential rotation of the rotating tube 12, form a spiral trajectory; the rounded chamfer eliminates stress concentration at the orifice and avoids fiber breakage.

[0056] To isolate the high temperature of spinning and ensure the stability of the drive system, a rotary drive structure for driving the rotating tube 12 is provided inside the middle plate 3. A second mounting cavity 302 is provided on the lower wall of the middle plate 3 and on the side of the first mounting cavity 301 away from the axis of the middle plate 3. A heat insulation shell 17 is fixedly connected to the inner wall of the second mounting cavity 302. A heat insulation roller 20 is rotatably connected to the upper wall of the heat insulation shell 17 in a through-hole shape. The heat insulation roller 20 is a 42CrMo alloy steel substrate covered with an Al2O3 modified silicone heat insulation layer. The rotary drive structure is set inside the heat insulation shell 17. The rotary drive structure includes a partition 21 and a servo motor 22. The partition 21 is fixedly connected to the inner wall of the heat insulation shell 17. The servo motor 22 is fixedly connected to the lower wall of the partition 21. The extension shaft of the servo motor 22 passes through the inner wall of the partition 21 and is fixedly connected to one end of the heat insulation roller 20 that extends into the heat insulation shell 17 through a coupling 11.

[0057] The 42CrMo alloy steel combined with the Al2O3 modified silicone insulation layer can effectively prevent heat from being transferred to the servo motor 22 and prevent the insulation layer of the servo motor 22 from aging.

[0058] In order to achieve a precise transmission ratio in a high-temperature environment, a transmission structure for transmission is provided between the heat-insulating roller 20 and the outer wall of the rotating tube 12. The transmission structure includes a first gear 18 and a second gear 19. The first gear 18 and the second gear 19 are respectively fixedly connected to the outer wall of the heat-insulating roller 20 and the outer wall of the rotating tube 12. The base of the first gear 18 and the second gear 19 are both made of GH4145 high-temperature alloy and the tooth surface is coated with CrAlN coating.

[0059] GH4145 high-temperature alloy maintains a tensile strength of ≥800MPa at 400℃, resisting gear meshing impact loads; the CrAlN coating can greatly reduce the coefficient of friction, prevent transmission jamming caused by high-temperature adhesion, and ensure that the rotation speed fluctuation of the rotating tube 12 is <±0.5rpm.

[0060] To facilitate heat dissipation and maintain the operating temperature of the servo motor 22, a water-cooling structure is installed inside the middle plate 3 to dissipate heat from the rotary drive structure. This water-cooling structure is connected to a water-cooling device and is positioned between the heat insulation shell 17 and the middle plate 3. The water-cooling structure includes a heat exchange coil 23, an outlet pipe 9, and an inlet pipe 10. A water passage 303 is provided on the lower wall of the middle plate 3. One end of the water passage 303 penetrates the outer circumference of the middle plate 3, and the inner wall of the water passage 303 is close to the middle plate 3. A plug 8 is fixedly connected to the outer wall of the plate 3. The water outlet pipe 9 and the water inlet pipe 10 are fixedly connected inside the plug 8 in a through-type manner. The ends of the water outlet pipe 9 and the water inlet pipe 10 that extend outside the middle plate 3 are both connected to the water cooling device. The ends of the water outlet pipe 9 and the water inlet pipe 10 that are away from the water cooling device both penetrate the outer wall of the heat insulation shell 17 and extend into the heat insulation shell 17. The heat exchange coil 23 is fixedly connected between the ends of the water outlet pipe 9 and the water inlet pipe 10 that extend into the heat insulation shell 17.

[0061] Cooling medium flows into heat exchange coil 23 from water inlet pipe 10, absorbs the heat generated by the operation of servo motor 22, and then flows back to water cooling device through water outlet pipe 9. The working temperature of servo motor 22 is maintained by circulating water cooling heat exchange.

[0062] A production process for a polyester fiber production equipment specifically for sportswear, comprising the following steps:

[0063] S1. The polyester melt (intrinsic viscosity 0.65±0.05 dL / g) conveyed from the polymerization section is homogenized by a static mixer and then directly conveyed to the spinning box through an insulated pipeline. The melt temperature is controlled at 285±2℃. The melt is evenly distributed to each rotating tube 12 through the liquid guiding holes 701 of multiple sets of liquid guiding pipes 7 in the annular groove 6, and the flow deviation of each liquid guiding pipe 7 is ≤3%.

[0064] S2. Dynamic spinning and forming: The servo motor 22 drives the heat-insulating roller 20 to rotate at 800-1500 rpm. The first gear 18 and the second gear 19 drive the rotating tube 12 to rotate synchronously. After the melt is pressurized again through the conical hole 1203, it is sent into the spinneret hole 1204. The straight edge 1205 makes the fiber surface form a groove structure. After the melt is sprayed out through the spinneret hole 1204, it forms a fiber with a spiral groove structure on the surface.

[0065] S3. Cooling and shaping: The nascent fibers are cooled by a ring blower.

[0066] S4. Fiber post-treatment: After cooling, the fiber bundle is given an antistatic agent by an oiling device with an oil concentration of 10±1%, and then collected by a winding device.

[0067] Working principle: The settling tank 5 and the annular tank 6 form a melt buffer space, which can buffer the fluctuation of the feeding pressure; multiple sets of liquid guide pipes 7 are evenly distributed around the annular tank 6 to ensure that the melt is evenly distributed to each first mounting cavity 301, avoiding problems such as uneven fiber thickness or filament breakage caused by local flow velocity differences; the nickel-based high-temperature alloy matrix can withstand the high temperature of the melt (>280℃), and the graphite-MoS2 composite coating provides high-temperature self-lubrication to prevent melt carbonization particles from jamming the bearing; the dual bearing layout (first bearing 13 and second bearing 15) limits the rotation tube 12. The axial position ensures concentricity of rotation, preventing inconsistent groove depths caused by eccentricity of the spinneret 1204; the butterfly spring 16 applies a constant axial preload to the second bearing 15 to compensate for the thermal expansion difference between the rotating tube 12 and the liquid guide tube 7 at high temperatures; the double-wave structure allows the spring stiffness to change non-linearly, adapting to micron-level displacement within the preload range, avoiding hard compression that could cause the bearing coating to peel off; the graphite sealing ring utilizes its self-lubricating properties and high-temperature resistance (limited temperature 450℃) to maintain stability when the rotating tube 12 and the liquid guide tube 7 rotate relative to each other. Maintains sealing surface fit; compared to rubber seals, it avoids the risk of melt leakage caused by high-temperature softening; the 5:1 aspect ratio spinneret 1204 provides sufficient shearing action, causing the melt molecular chains to orient along the extrusion direction; the straight edge 1205 engraves equally divided grooves on the fiber surface, forming a helical trajectory in conjunction with the circumferential rotation of the rotating tube 12; the rounded chamfer eliminates stress concentration at the orifice, preventing fiber breakage; the 42CrMo alloy steel combined with the Al2O3 modified silicone insulation layer effectively prevents heat transfer to the servo motor 22, avoiding servo... The insulation layer of the servo motor 22 is aged; the GH4145 high-temperature alloy still maintains a tensile strength of ≥800MPa at 400℃, resisting gear meshing impact loads; the CrAlN coating can greatly reduce the coefficient of friction, prevent transmission jamming caused by high-temperature adhesion, and ensure that the rotation speed fluctuation of the rotating tube 12 is <±0.5rpm; the cooling medium flows into the heat exchange coil 23 from the inlet pipe 10, absorbs the heat generated by the operation of the servo motor 22, and then flows back to the water cooling device through the outlet pipe 9, maintaining the working temperature of the servo motor 22 through circulating water cooling heat exchange.

[0068] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An apparatus for producing polyester fibers for sports wear, characterized by: The device includes a feeding device, a spinning box, a spinneret, a water cooling device, a ring air cooling device, an oiling device, and a winding device. The spinneret is fixedly connected to the lower wall of the spinning box. The spinneret is composed of an upper plate (1), a middle plate (3), and a lower plate (4) arranged sequentially from top to bottom. The upper plate (1) has a settling groove (5) on its upper wall. The lower inner wall of the settling groove (5) has an annular groove (6). The lower inner wall of the annular groove (6) is fixedly connected to multiple sets of liquid guide tubes (7) in a through-hole manner. The upper end of the liquid guide tube (7) is flush with the lower inner wall of the annular groove (6). The middle plate (3) has multiple sets of first mounting cavities (301) on its inner wall. The lower end of the liquid guide tube (7) is through-hole. The upper plate (1) extends into the inner wall of the first mounting cavity (301). The outer wall of the end of the liquid guide tube (7) that extends into the first mounting cavity (301) is rotatably connected to a rotating tube (12). The upper wall of the rotating tube (12) is provided with a connecting countersunk hole (1202). The lower end of the liquid guide tube (7) is rotatably connected to the inner wall of the connecting countersunk hole (1202). The lower end of the rotating tube (12) is provided with a step (1201). The end of the step (1201) away from the rotating tube (12) passes through the lower wall of the lower plate (4) and is connected to the lower side of the lower plate (4). The middle plate (3) is provided with a rotating drive structure for driving the rotating tube (12) to rotate. The plate (3) is equipped with a water-cooling structure for heat dissipation of the rotary drive structure, and the water-cooling structure is connected to the water-cooling device; the lower end of the liquid guide tube (7) is rotatably connected to the lower inner wall of the connecting countersunk hole (1202) through a first bearing (13), and the outer wall of the liquid guide tube (7) is rotatably sealed to the inner wall of the connecting countersunk hole (1202) through a sealing element (14); a second bearing (15) is provided between the lower end of the rotating tube (12) and the outer wall of the step (1201); a butterfly spring (16) is provided between the lower wall of the second bearing (15) and the upper wall of the lower plate (4); the butterfly spring (16) has a double waveform structure and the waveform height is 0.8 mm. The inner wall of the liquid guide tube (7) is provided with a liquid guide hole (701) that runs vertically through the tube. The inside of the rotating tube (12) is provided with a conical hole (1203) that runs through the lower wall of the connecting countersunk hole (1202). The lower wall of the conical hole (1203) is provided with a spinneret hole (1204) that runs through the lower end of the step (1201). The length-to-diameter ratio of the spinneret hole (1204) is 5:

1. The inner side wall of the spinneret hole (1204) is provided with a number of straight edges (1205) for forming grooves on the outer wall of the spinneret bundle. The number of straight edges (1205) are distributed in a circle with the spinneret hole (1204) as the center. The lower edge of the spinneret hole (1204) is provided with a rounded chamfer.

2. The polyester fiber production apparatus for sports wear according to claim 1, wherein: A second mounting cavity (302) is provided on the lower wall of the middle plate (3) and on the side of the first mounting cavity (301) away from the axis of the middle plate (3). A heat insulation shell (17) is fixedly connected to the inner wall of the second mounting cavity (302). A heat insulation roller (20) is rotatably connected to the upper wall of the heat insulation shell (17) in a through-hole manner. The heat insulation roller (20) is a 42CrMo alloy steel substrate covered with an Al2O3 modified silicone heat insulation layer. A transmission structure for transmission is provided between the heat insulation roller (20) and the outer wall of the rotating tube (12). The rotation drive structure is provided inside the heat insulation shell (17). The water cooling structure is provided between the heat insulation shell (17) and the middle plate (3).

3. The polyester fiber production apparatus for sports wear according to claim 2, wherein: The rotary drive structure includes a partition (21) and a servo motor (22). The partition (21) is fixedly connected to the inner wall of the heat insulation shell (17), and the servo motor (22) is fixedly connected to the lower wall of the partition (21). The extension shaft of the servo motor (22) passes through the inner wall of the partition (21) and is fixedly connected to one end of the heat insulation roller (20) that extends into the heat insulation shell (17) through a coupling (11).

4. The polyester fiber production apparatus for sports wear according to claim 3, wherein: The water-cooled structure includes a heat exchange coil (23), an outlet pipe (9), and an inlet pipe (10). A water passage (303) is provided on the lower wall of the middle plate (3). One end of the water passage (303) extends through the outer circumferential wall of the middle plate (3). A plug (8) is fixedly connected to the inner side wall of the water passage (303) near the outer circumferential wall of the middle plate (3). The outlet pipe (9) and the inlet pipe (10) are fixedly connected in a through-type configuration. Inside the plug (8), the ends of the water outlet pipe (9) and the water inlet pipe (10) extending out of the middle plate (3) are connected to the water cooling device. The ends of the water outlet pipe (9) and the water inlet pipe (10) away from the water cooling device penetrate the outer wall of the heat insulation shell (17) and extend into the interior of the heat insulation shell (17). The heat exchange coil (23) is fixedly connected between the ends of the water outlet pipe (9) and the water inlet pipe (10) extending into the interior of the heat insulation shell (17).

5. The polyester fiber production equipment for sportswear according to claim 4, characterized in that: The first bearing (13) and the second bearing (15) are both sliding bearings. The first bearing (13) and the second bearing (15) are both nickel-based high-temperature alloys with a surface plasma-sprayed graphite-MoS2 composite coating.

6. The polyester fiber production equipment for sportswear according to claim 5, characterized in that: The transmission structure includes a first gear (18) and a second gear (19). The first gear (18) and the second gear (19) are fixedly connected to the outer wall of the heat-insulating roller (20) and the outer wall of the rotating tube (12), respectively. The base of the first gear (18) and the second gear (19) are both made of GH4145 high-temperature alloy and the tooth surfaces are coated with CrAlN coating.

7. The polyester fiber production equipment for sportswear according to claim 6, characterized in that: The upper plate (1) is provided with an installation flange (2) on its outer wall. The installation flange (2) is detachably connected to the lower wall of the spinning box by multiple sets of bolts.

8. The polyester fiber production equipment for sportswear according to claim 7, characterized in that: The sealing element (14) is a graphite sealing ring.

9. A production process for a polyester fiber production equipment for sportswear, using the polyester fiber production equipment for sportswear described in claim 8, characterized in that: The production process includes the following steps: S1. The polyester melt conveyed from the polymerization section is homogenized by a static mixer and then directly conveyed to the spinning box through an insulated pipe. The melt temperature is controlled at 285±2℃. The melt is evenly distributed to each rotating tube (12) through the liquid guide holes (701) of multiple sets of liquid guide pipes (7) in the annular groove (6). The flow deviation of each liquid guide pipe (7) is ≤3%. The intrinsic viscosity of the polyester melt is 0.65±0.05dL / g. S2, Dynamic spinning and forming: The servo motor (22) drives the heat-insulating roller (20) to rotate at 800-1500 rpm. The first gear (18) and the second gear (19) drive the rotating tube (12) to rotate synchronously. After the melt is pressurized again through the conical hole (1203), it is sent into the spinneret hole (1204). The straight edge (1205) makes the fiber surface form a groove structure. After the melt is sprayed out through the spinneret hole (1204), it forms a fiber with a spiral groove structure on the surface. S3. Cooling and shaping: The nascent fibers are cooled by a ring blower. S4. Fiber post-treatment: After cooling, the fiber bundle is given an antistatic agent by an oiling device with an oil concentration of 10±1%, and then collected by a winding device.

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