Production equipment and production process for polyester fibers special for sportswear

Abstract

The invention provides production equipment and a production process for polyester fibers special for sportswear, and relates to the technical field of fiber spinning. The special polyester fiber production equipment for the sportswear comprises a feeding device, a spinning box body, a spinneret plate, a water cooling device, a circular blowing cooling device, an oiling device and a winding device. According to the invention, a spiral groove fiber structure is formed through rotary spinning, the moisture conduction efficiency is enhanced by utilizing the capillary effect of the spiral groove, and a traditional after-treatment moisture absorption and sweat releasing auxiliary agent is replaced, so that the problem of function attenuation caused by washing is fundamentally solved, and the problem of poor moisture absorption and heat conduction efficiency of a straight groove is solved; a heat insulation shell and water cooling structure collaborative design is adopted, a heat insulation rotating roller blocks spinning high-temperature conduction, a heat exchange coil pipe directly cools the operation environment of a servo motor, the stability of a driving system under the high-temperature working condition is guaranteed through double protection, and therefore it is guaranteed that a rotating pipe accurately controls the fiber groove forming quality.

Description

Technical Field

[0001] The present invention relates to the technical field of fiber spinning, in particular to a production device and a production process for polyester fibers specially used for sportswear. Background Art

[0002] With the continuous development and progress of society, people are paying more and more attention to sports. Sportswear is mainly worn when people are playing sports or doing outdoor activities. Because athletes sweat a lot during exercise, sportswear must have excellent moisture-wicking and quick-drying properties. That is, the sweat produced by the human body is quickly transferred from the near-skin layer to the back layer and dissipated quickly, thereby keeping the skin dry and comfortable. At the same time, as outdoor clothing, its UV resistance cannot be ignored. Especially for athletes in the northwest plateau, UV resistance is particularly important. Currently, the method of imparting UV resistance and moisture-wicking and quick-drying properties to sports fabrics is to use fibers with a grooved structure and then post-finish the fabric with a UV finish agent and a moisture-wicking finish agent, respectively, so that the UV finish agent and moisture-wicking finish agent are adsorbed on the fabric. This method can greatly reduce the difficulty of fabric production. However, the content of UV finish agent and moisture-wicking finish agent in the sports fabrics produced by this method will decrease due to repeated washing of the clothes, which will weaken the UV resistance and moisture-wicking properties of the sports fabrics. Therefore, there is still room for improvement.

[0003] To this end, a publicly available technology proposes a production process for multifunctional outdoor sports fabrics (Chinese Patent Publication No. CN115045126B). The process includes the following steps: S1: Weaving a combed fabric: 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 and setting; S5: Dyeing: The fabric treated in S4 is dyed with a reactive dye, while simultaneously adding an anti-UV agent and a moisture-wicking agent to the dye bath; S6: Color fixing; and S7: Finishing to produce the finished multifunctional outdoor sports fabric. This publicly available technology improves the wash resistance of the sports fabric, imparting superior UV resistance and moisture-wicking properties.

[0004] However, the above-mentioned disclosed technical control textile method is used to improve the problem that the moisture absorption and perspiration resistance of sports fabrics is not resistant to washing. However, its moisture absorption and perspiration resistance will still be gradually lost due to washing, and the existing groove structures are all straight grooves, that is, the length direction is parallel to the length direction of the fiber, and the moisture absorption and perspiration effect is limited, which has little actual improvement effect on sports fabrics. Therefore, it is necessary to develop a polyester fiber production equipment and production process for sportswear to solve the problem of functional durability from the source of the fiber. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the present invention provides a production device and a production process for polyester fibers for sportswear, which solves the problem that the moisture absorption and perspiration wicking performance of polyester fibers for sportswear in the existing technology is not resistant to washing.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a polyester fiber production equipment for sportswear, including a feeding device, a spinning box, a spinneret, a water cooling device, a ring blowing 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 body, a middle plate body and a lower plate body arranged in sequence from top to bottom, the upper wall of the upper plate body is provided with a sink, the lower wall inside the sink is provided with an annular groove, the lower wall inside the annular groove is fixedly connected with multiple groups of liquid guide tubes in a through shape, the upper end of the liquid guide tube is flush with the lower wall inside the annular groove, the inner wall of the middle plate body is provided with multiple groups of the An installation cavity, the lower end of the liquid guide tube passes through the inner wall of the upper plate body and extends toward the inside of the first installation cavity, the outer wall of one end of the liquid guide tube extending into the inside of the first installation cavity is rotatably connected to a rotating tube, the upper wall of the rotating tube is provided with a connecting countersunk hole, the lower end of the liquid guide tube is rotatably connected to the inner wall of the connecting countersunk hole, the lower end of the rotating tube is provided with a step, the end of the step away from the rotating tube passes through the lower wall of the lower plate body and passes through the lower side of the lower plate body, a rotating drive structure for driving the rotating tube to rotate is provided inside the middle plate body, a water cooling structure for dissipating heat from the rotating drive structure is provided inside the middle plate body, and the water cooling structure is connected to the water cooling device.

[0007] Preferably, the lower end of the liquid guide tube is rotatably connected to the lower inner wall of the connecting sink hole by a first bearing, and a rotating seal is formed between the outer wall of the liquid guide tube and the inner wall of the connecting sink hole by a sealing member, a second bearing is provided between the lower end of the rotating tube and the outer wall of the step, and a butterfly spring is provided between the lower wall of the second bearing and the upper wall of the lower plate body, the butterfly spring is a double-wave structure and the wave height is 0.8mm, the inner wall of the liquid guide tube is provided with a liquid guide hole that passes through up and down, the interior of the rotating tube is provided with a tapered hole that passes through the lower wall of the connecting sink hole, the lower wall of the tapered hole is provided with a spinneret that passes through the lower end of the step, the aspect ratio of the spinneret is 5:1, and the inner wall of the spinneret is provided with multiple groups of straight edges for forming grooves on the outer wall of the ejected filament bundle, and the multiple groups of straight edges are equally distributed on the circumference with the axis of the spinneret as the center, and the lower edge of the spinneret is provided with a circular chamfer.

[0008] The double bearing layout (first bearing and second bearing) limits the position of the rotating tube axis, ensuring the concentricity of rotation and preventing the spinneret hole from being eccentric and causing inconsistent groove depth;

[0009] The butterfly spring applies a constant axial preload to the second bearing, compensating for the differential thermal expansion between the rotating tube and the catheter at high temperatures. The double-wave structure allows the spring stiffness to vary nonlinearly, enabling adaptive micron-level displacement within the preload range, preventing peeling of the bearing coating due to hard extrusion.

[0010] The spinneret with an aspect ratio of 5:1 provides sufficient shearing effect to orient the melt molecular chains along the extrusion direction; the straight edges carve equally divided grooves on the fiber surface, forming a spiral trajectory in conjunction with the circumferential rotation of the rotating tube; the arc chamfer eliminates stress concentration at the orifice and avoids fiber breakage.

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

[0012] 42CrMo alloy steel combined with Al2O3 modified silicone insulation layer can fully prevent heat from being transferred to the servo motor and prevent 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 insulation shell, the servo motor is fixedly connected to the lower wall of the partition, and the servo motor extends a shaft through the inner wall of the partition and is fixedly connected to one end of the insulation roller extending into the interior of the insulation shell through a coupling.

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

[0015] Preferably, the water cooling structure includes a heat exchange coil, a water outlet pipe and a water inlet pipe, the lower wall of the middle plate body is provided with a water channel, one end of the water channel passes through the circumferential outer wall of the middle plate body, and a plug is fixedly connected to the inner wall of the water channel and close to the circumferential outer wall of the middle plate body, the water outlet pipe and the water inlet pipe are fixedly connected to the inside of the plug in a through-shape, and the ends of the water outlet pipe and the water inlet pipe extending outside the middle plate body are both connected to the water cooling device, and the ends of the water outlet pipe and the water inlet pipe away from the water cooling device pass through the outer wall of the heat-insulating shell and extend into the interior of the heat-insulating shell, and the heat exchange coil is fixedly connected between the ends of the water outlet pipe and the water inlet pipe extending into the interior of the heat-insulating shell.

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

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

[0018] The nickel-based high-temperature alloy substrate can withstand high melt temperatures (>280°C), and the graphite-MoS2 composite coating provides high-temperature self-lubrication to prevent melt carbonized particles from seizing 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 insulation roller and the outer wall of the rotating tube respectively. The first gear and the second gear base are both made of GH4145 high-temperature alloy and the tooth surfaces are sprayed with CrAlN coating.

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

[0021] Preferably, the outer wall of the upper plate body is provided with a mounting flange, and the mounting flange is detachably connected to the lower wall of the spinning box body through multiple groups of bolts.

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

[0023] The graphite sealing ring uses its self-lubrication and high temperature resistance (limit temperature 450°C) to maintain the sealing surface fit when the rotating tube and the liquid guide tube rotate relative to each other; compared with rubber seals, it can avoid the risk of melt leakage caused by high temperature softening.

[0024] A production process of a polyester fiber production device for sportswear, using the above-mentioned polyester fiber production device for sportswear for production, the production process comprises the following steps:

[0025] S1. The polyester melt (intrinsic viscosity 0.65±0.05 dL / g) delivered from the polymerization section is homogenized in a static mixer and then directly delivered to the spinning manifold through an insulated pipe. The melt temperature is controlled at 285±2°C. The melt is evenly distributed to each rotating tube through the liquid guide holes of multiple groups of liquid guide tubes in the annular groove. The flow deviation of each liquid guide tube is ≤3%.

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

[0027] S3, cooling and shaping, the nascent fiber is cooled by an annular blowing device;

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

[0029] The present invention provides a production device and process for polyester fibers specifically for sportswear, which have the following beneficial effects:

[0030] 1. Compared with the existing technology, this sportswear-specific polyester fiber production equipment and production process forms a spiral groove fiber structure through rotary spinning, and uses the capillary effect of the spiral groove to enhance moisture conduction efficiency, replacing traditional post-finishing moisture absorption and perspiration aids, fundamentally solving the problem of functional attenuation caused by washing, and at the same time solving the problem of poor moisture absorption and heat conduction efficiency of straight grooves.

[0031] 2. Compared with existing technologies, this sportswear-specific polyester fiber production equipment and production process adopts a collaborative design of thermal insulation shell and water cooling structure: the thermal insulation roller blocks the conduction of high-temperature spinning, and the heat exchange coil directly cools the servo motor operating environment. The double protection ensures the stability of the drive system under high-temperature conditions, thereby ensuring that the rotating tube accurately controls the quality of fiber groove molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic diagram of the spinneret structure of the present invention;

[0033] Figure 2 For the present invention Figure 1 A partial enlarged view of point A in the middle;

[0034] Figure 3 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 partial enlarged view of point B in the middle;

[0036] Figure 5 For the present invention Figure 3 A partial enlarged view of point C in the middle;

[0037] Figure 6 For the present invention Figure 3 A partial enlarged view of point D in the middle;

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

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

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

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

[0042] Among them, 1. upper plate body; 2. mounting flange; 3. middle plate body; 301. first mounting cavity; 302. second mounting cavity; 303. water passage; 4. lower plate body; 5. sink; 6. ring groove; 7. liquid guide tube; 701. liquid guide hole; 8. plug; 9. outlet pipe; 10. inlet pipe; 11. coupling; 12. rotating tube; 1201. step; 1202. connecting sink hole; 1203. tapered hole; 1204. spinneret hole; 1205. straight edge; 13. first bearing; 14. seal; 15. second bearing; 16. butterfly spring; 17. thermal insulation shell; 18. first gear; 19. second gear; 20. thermal insulation roller; 21. partition; 22. servo motor; 23. heat exchange coil. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0044] Example:

[0045] like Figures 1 to 10 As shown, an embodiment of the present invention provides a polyester fiber production device for sportswear, including a feeding device, a spinning manifold, a spinneret, a water cooling device, a ring-blowing cooling device, an oiling device, and a winding device. The spinneret is fixedly connected to the lower wall of the spinning manifold. The spinneret consists of an upper plate body 1, a middle plate body 3, and a lower plate body 4 arranged in sequence from top to bottom. The outer wall of the upper plate body 1 is provided with a mounting flange 2, and the mounting flange 2 is detachably connected to the lower wall of the spinning manifold by multiple sets of bolts;

[0046] In order to achieve uniform distribution of the spinning melt, a sink 5 is provided on the upper wall of the upper plate body 1, and an annular groove 6 is provided on the inner lower wall of the sink 5. The inner lower wall of the annular groove 6 is fixedly connected with multiple groups of liquid guide tubes 7 in a through-shaped manner. The upper ends of the liquid guide tubes 7 are flush with the inner lower wall of the annular groove 6. The inner wall of the middle plate body 3 is provided with multiple groups of first installation cavities 301. The lower ends of the liquid guide tubes 7 pass through the inner wall of the upper plate body 1 and extend toward the inside of the first installation cavity 301.

[0047] The sink 5 and the annular groove 6 form a melt buffer space to buffer the fluctuation of the feeding pressure. The multiple groups of liquid guide tubes 7 are evenly distributed along the circumference of the annular groove 6 to ensure that the melt is equally distributed to each first installation cavity 301, thereby avoiding the problem of uneven fiber thickness or broken fibers caused by local flow rate differences.

[0048] In order to achieve stable rotation of the rotating tube and isolate the heat conduction of the high-temperature melt, the outer wall of one end of the liquid guide tube 7 extending into the first installation cavity 301 is rotatably connected to the rotating tube 12, and 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, and the lower end of the liquid guide tube 7 is rotatably connected to the inner lower 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, and the end of the step 1201 away from the rotating tube 12 passes through the lower wall of the lower plate body 4 and passes through the lower side of the lower plate body 4. A second bearing 15 is provided between the lower end of the rotating tube 12 and the outer wall of the step 1201. 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 surface plasma sprayed graphite-MoS2 composite coatings;

[0049] The nickel-based high-temperature alloy substrate can withstand high melt temperatures (>280°C), and the graphite-MoS2 composite coating provides high-temperature self-lubrication, preventing carbonized particles from the melt from seizing the bearing. The dual-bearing layout (first bearing 13 and second bearing 15) defines the axis position of the rotating tube 12, ensuring concentricity and preventing eccentricity of the spinneret hole 1204, which could lead to inconsistent groove depths.

[0050] In order to eliminate the bearing gap 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-wave structure and the wave height is 0.8 mm.

[0051] The butterfly spring 16 applies a constant axial preload to the second bearing 15 to compensate for the differential thermal expansion between the rotating tube 12 and the liquid guide tube 7 at high temperatures. The double-wave structure allows the spring stiffness to vary nonlinearly, enabling adaptive micron-level displacement within the preload range, thus preventing peeling of the bearing coating due to hard extrusion.

[0052] In order 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 through a seal 14, which is a graphite sealing ring;

[0053] The graphite sealing ring utilizes its self-lubricating properties and high temperature resistance (maximum temperature 450°C) 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 high-precision spiral grooves on the fiber surface, the inner wall of the liquid guide tube 7 is provided with a liquid guide hole 701 that passes through from top to bottom. The rotating tube 12 is provided with a tapered hole 1203 that passes through the lower wall of the connecting countersunk hole 1202. The lower wall of the tapered hole 1203 is provided with a spinneret 1204 that passes through the lower end of the step 1201. The spinneret 1204 has an aspect ratio of 5:1. The inner side wall of the spinneret 1204 is provided with multiple groups of straight edges 1205 for forming grooves on the outer wall of the ejected filament bundle. The multiple groups of straight edges 1205 are equally distributed on the circumference with the axis of the spinneret 1204 as the center, and the lower edge of the spinneret 1204 is provided with a circular chamfer.

[0055] The spinneret hole 1204 with an aspect ratio of 5:1 provides sufficient shearing effect to orient the melt molecular chains along the extrusion direction; the straight edge 1205 carves equally divided grooves on the fiber surface, forming a spiral trajectory in conjunction with the circumferential rotation of the rotating tube 12; the arc chamfer eliminates stress concentration at the hole mouth and prevents fiber breakage;

[0056] In order to isolate the high temperature of spinning and ensure the stability of the driving system, a rotating drive structure for driving the rotating tube 12 to rotate is provided inside the middle plate body 3. A second installation cavity 302 is provided on the lower wall of the middle plate body 3 and on the side of the first installation cavity 301 away from the axis of the middle plate body 3. The inner wall of the second installation cavity 302 is fixedly connected to the heat-insulating shell 17. The upper wall of the heat-insulating shell 17 is rotatably connected to the heat-insulating roller 20. The heat-insulating roller 20 is a 42CrMo alloy steel matrix coated with an Al2O3 modified silicone insulation layer. The rotating drive structure is arranged inside the heat-insulating shell 17. The rotating drive structure includes a partition 21 and a servo motor 22. The partition 21 is fixedly connected to the inner wall of the heat-insulating shell 17. The servo motor 22 is fixedly connected to the lower wall of the partition 21. The servo motor 22 extends a shaft through the inner wall of the partition 21 and is fixedly connected to one end of the heat-insulating roller 20 extending into the interior of the heat-insulating shell 17 through the coupling 11;

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

[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 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 sprayed with CrAlN coating;

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

[0060] In order to force heat dissipation and maintain the working temperature of the servo motor 22, a water cooling structure for dissipating heat to the rotary drive structure is provided inside the middle plate body 3. The water cooling structure is connected to the water cooling device. The water cooling structure is provided between the heat insulation shell 17 and the middle plate body 3. The water cooling structure includes a heat exchange coil 23, a water outlet pipe 9 and a water inlet pipe 10. A water channel 303 is provided on the lower wall of the middle plate body 3. One end of the water channel 303 passes through the outer wall of the middle plate body 3. The inner wall of the water channel 303 is close to the middle plate body 3. A plug 8 is fixedly connected to the circumferential outer wall of the plate body 3, and a water outlet pipe 9 and a water inlet pipe 10 are fixedly connected to the inside of the plug 8 in a penetrating manner. The ends of the water outlet pipe 9 and the water inlet pipe 10 extending outside the middle plate body 3 are both 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 both penetrate the outer wall of the heat-insulating shell 17 and extend into the interior of the heat-insulating 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-insulating shell 17;

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

[0062] A production process of a polyester fiber production device for sportswear, using the above-mentioned polyester fiber production device for sportswear for production, the production process comprises the following steps:

[0063] S1. The polyester melt (intrinsic viscosity 0.65±0.05 dL / g) delivered from the polymerization section is homogenized in a static mixer and then directly delivered to the spinning manifold through an insulated pipe. The melt temperature is controlled at 285±2°C. The melt is evenly distributed to each rotating tube 12 through the liquid guide holes 701 of the multiple groups of liquid guide tubes 7 in the annular groove 6. The flow rate deviation of each liquid guide tube 7 is ≤3%.

[0064] S2, dynamic spinning: the servo motor 22 drives the heat-insulating roller 20 to rotate at 800-1500 rpm, and the first gear 18 and the second gear 19 drive the rotating tube 12 to rotate synchronously. The melt is pressurized again through the tapered hole 1203 and then fed into the spinneret 1204. The straight edges 1205 form a groove structure on the fiber surface. After the melt is ejected from the spinneret 1204, a fiber with a spiral groove structure on the surface is formed.

[0065] S3, cooling and shaping, the nascent fiber is cooled by an annular blowing device;

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

[0067] Working principle: The sink 5 and the annular groove 6 form a melt buffer space to buffer the fluctuation of the feeding pressure; multiple groups of liquid guide tubes 7 are evenly distributed along the circumference of the annular groove 6 to ensure that the melt is equally distributed to each first installation cavity 301, avoiding the problem of uneven fiber thickness or broken wires caused by local flow rate differences; the nickel-based high-temperature alloy substrate can withstand the high temperature of the melt (>280℃), and the graphite-MoS2 composite coating provides high-temperature self-lubrication to avoid the carbonized particles of the melt from getting stuck in the bearings; the dual-bearing layout (first bearing 13 and second bearing 15) limits the rotating tube 12 The axis position ensures the concentricity of rotation and prevents the eccentricity of the spinneret hole 1204 from causing inconsistent groove depth; 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 under high temperature; the double-wave structure makes the spring stiffness change nonlinearly, and it can adapt to micron-level displacement within the preload range to avoid hard extrusion causing bearing coating peeling; the graphite sealing ring uses its self-lubrication and high temperature resistance (limit temperature 450°C) to maintain the rotation tube 12 and the liquid guide tube 7 when they rotate relative to each other. Maintain the sealing surface fit; compared with rubber seals, it can avoid the risk of melt leakage caused by high temperature softening; the spinneret 1204 with an aspect ratio of 5:1 provides sufficient shearing effect to orient the melt molecular chain along the extrusion direction; the straight edge 1205 carves equally divided grooves on the fiber surface, forming a spiral trajectory in conjunction with the circumferential rotation of the rotating tube 12; the arc chamfer eliminates the stress concentration at the hole mouth and avoids the breakage of the tow; 42CrMo alloy steel combined with Al2O3 modified silicone insulation layer can fully prevent heat from being transferred to the servo motor 22, avoiding servo The insulation layer of the servo motor 22 ages; the GH4145 high-temperature alloy still maintains a tensile strength of ≥800MPa at 400°C, resisting the impact load of gear meshing; the CrAlN coating can greatly reduce the friction coefficient, prevent transmission jamming caused by high-temperature adhesion, and ensure that the speed fluctuation of the rotating tube 12 is less than ±0.5rpm; the cooling medium flows from the water inlet pipe 10 into the heat exchange coil 23, absorbs the heat generated by the operation of the servo motor 22, and then flows back to the water cooling device through the water outlet pipe 9, and the operating temperature of the servo motor 22 is maintained by circulating water cooling and heat exchange.

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

Claims

1. A polyester fiber production equipment for sportswear, characterized by: The invention comprises a feeding device, a spinning box, a spinneret, a water cooling device, a ring-blowing cooling device, an oiling device and a winding device, wherein the spinneret is fixedly connected to the lower wall of the spinning box, and the spinneret is composed of an upper plate body (1), a middle plate body (3) and a lower plate body (4) arranged in sequence from top to bottom, the upper wall of the upper plate body (1) is provided with a sinking groove (5), the lower wall of the inner side of the sinking groove (5) is provided with an annular groove (6), the lower wall of the inner side of the annular groove (6) is fixedly connected with multiple groups of liquid guide tubes (7) in a through-shaped manner, the upper end of the liquid guide tube (7) is flush with the lower wall of the inner side of the annular groove (6), the inner wall of the middle plate body (3) is provided with multiple groups of first installation cavities (301), the lower end of the liquid guide tube (7) passes through the inner wall of the upper plate body (1) and faces the first installation cavity (301). The outer wall of one end of the liquid guide tube (7) extending into the first installation cavity (301) is rotatably connected to the 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 body (4) and passes through the lower side of the lower plate body (4), the interior of the middle plate body (3) is provided with a rotating drive structure for driving the rotating tube (12) to rotate, the interior of the middle plate body (3) is provided with a water cooling structure for dissipating heat from the rotating drive structure, and the water cooling structure is connected to the water cooling device.

2. The polyester fiber production equipment for sportswear according to claim 1, characterized in that: The lower end of the liquid guide tube (7) is rotatably connected to the lower inner wall of the connecting sink hole (1202) via a first bearing (13), and a sealing member (14) forms a rotational seal between the outer wall of the liquid guide tube (7) and the inner wall of the connecting sink hole (1202). 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-wave structure and a wave height of 0.8 mm. The inner wall of the liquid guide tube (7) is provided with a liquid guide spring that is vertically penetrating. The rotating tube (12) is provided with a tapered hole (1203) which is in communication with the lower wall of the connecting counterbore (1202), and the lower wall of the tapered hole (1203) is provided with a spinneret (1204) which is in communication with the lower end of the step (1201), the spinneret (1204) has an aspect ratio of 5:1, and the inner wall of the spinneret (1204) is provided with multiple groups of straight edges (1205) for forming grooves on the outer wall of the ejected filament bundle, the multiple groups of straight edges (1205) are equally distributed in a circle with the axis of the spinneret (1204) as the center, and the lower edge of the spinneret (1204) is provided with a circular chamfer.

3. The polyester fiber production equipment for sportswear according to claim 2, characterized in that: A second mounting cavity (302) is provided on the lower wall of the middle plate body (3) and located on a side of the first mounting cavity (301) away from the axis of the middle plate body (3); an inner wall of the second mounting cavity (302) is fixedly connected to a heat-insulating shell (17); an upper wall of the heat-insulating shell (17) is rotatably connected to a heat-insulating roller (20) in a through-shaped manner; the heat-insulating roller (20) is a 42CrMo alloy steel base coated with an Al2O3 modified silicone insulation layer; a transmission structure for transmission is provided between the heat-insulating roller (20) and the outer wall of the rotating tube (12); the rotary drive structure is provided inside the heat-insulating shell (17); and the water-cooling structure is provided between the heat-insulating shell (17) and the middle plate body (3).

4. The polyester fiber production equipment for sportswear according to claim 3, characterized in that: The rotary drive structure includes a partition (21) and a servo motor (22), wherein the partition (21) is fixedly connected to the inner wall of the heat-insulating shell (17), and the servo motor (22) is fixedly connected to the lower wall of the partition (21). The servo motor (22) extends a shaft through the inner wall of the partition (21) and is fixedly connected to one end of the heat-insulating roller (20) extending into the interior of the heat-insulating shell (17) through a coupling (11).

5. The polyester fiber production equipment for sportswear according to claim 4, characterized in that: The water cooling structure includes a heat exchange coil (23), a water outlet pipe (9) and a water inlet pipe (10). A water passage (303) is provided on the lower wall of the middle plate body (3). One end of the water passage (303) passes through the circumferential outer wall of the middle plate body (3). A plug (8) is fixedly connected to the inner wall of the water passage (303) near the circumferential outer wall of the middle plate body (3). The water outlet pipe (9) and the water inlet pipe (10) are fixedly connected in a through-shaped manner. Inside the plug (8), the ends of the water outlet pipe (9) and the water inlet pipe (10) extending outside the middle plate body (3) are both connected to the water cooling device, and the ends of the water outlet pipe (9) and the water inlet pipe (10) away from the water cooling device both pass through the outer wall of the heat-insulating shell (17) and extend into the interior of the heat-insulating shell (17), and 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-insulating shell (17).

6. The polyester fiber production equipment for sportswear according to claim 5, characterized in that: The first bearing (13) and the second bearing (15) are both sliding bearings, and 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.

7. The polyester fiber production equipment for sportswear according to claim 6, characterized in that: The transmission structure comprises a first gear (18) and a second gear (19), wherein 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 bases of the first gear (18) and the second gear (19) are both made of GH4145 high-temperature alloy, and the tooth surfaces are both sprayed with CrAlN coating.

8. The polyester fiber production equipment for sportswear according to claim 7, characterized in that: The outer wall of the upper plate body (1) is provided with a mounting flange (2), and the mounting flange (2) is detachably connected to the lower wall of the spinning box body via multiple groups of bolts.

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

10. A production process of a polyester fiber production device for sportswear, using the polyester fiber production device for sportswear according to any one of claims 1 to 9, characterized in that: The production process comprises the following steps: S1. The polyester melt (intrinsic viscosity 0.65±0.05 dL / g) delivered from the polymerization section is homogenized in a static mixer and then directly delivered to the spinning manifold through an insulated pipe. The melt temperature is controlled at 285±2°C. The melt is distributed equally to each rotating tube (12) through the liquid guide holes (701) of multiple groups of liquid guide tubes (7) in the annular groove (6). The flow deviation of each liquid guide tube (7) is ≤3%. S2, dynamic spinning forming, the servo motor (22) drives the heat-insulating roller (20) to rotate at 800-1500 rpm, and the first gear (18) and the second gear (19) drive the rotating tube (12) to rotate synchronously, and the melt is pressurized again after passing through the cone hole (1203) and then sent into the spinneret (1204), and the straight edge (1205) forms a groove structure on the fiber surface. After the melt is ejected from the spinneret (1204), a fiber with a spiral groove structure on the surface is formed; S3, cooling and shaping, the nascent fiber is cooled by an annular blowing device; S4, fiber post-treatment, after cooling, the tow is given an antistatic agent by an oiling device with an oil concentration of 10±1%, and is then wound and collected by a winding device.

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