Spinning apparatus and method for regenerated polyester fibers based on recycling of waste textiles

Abstract

The application discloses a regenerated polyester fiber spinning device and method based on waste and old textile recycling, and relates to the technical field of textile machinery manufacturing. The device comprises a mounting shell, which is provided with a recycling mechanism for recycling waste and old textiles to produce regenerated polyester fibers. Hot air generated by a hot air blower device enters a vertical pipe through a duct, is then distributed to multiple groups of annular pipes, and is finally uniformly sprayed into the inside of a feeding shell through nozzles. At the same time, a water tank sprays liquid into the same group of nozzles through a micro pump. A temperature sensor monitors the temperature in the cavity in real time, and a program temperature control module strictly controls the temperature of the hot air. The spandex is relaxed and shrunk under heat, the elasticity disappears, the cotton fiber absorbs water, swells and protrudes, and the separation trend from the polyester increases. The polyester only releases internal stress and becomes soft, and does not melt. The low-temperature wet heat treatment does not cause the polyester fiber to melt and deteriorate at high temperature, the original spinning performance of the polyester fiber is completely retained, and the problem of raw material scrapping caused by high-temperature pretreatment is eliminated.

Description

Technical Field

[0001] This invention relates to the field of textile machinery manufacturing technology, specifically to equipment and methods for spinning recycled polyester fibers based on the recycling of waste textiles. Background Technology

[0002] With the rapid development of the textile industry and the upgrading of consumption, the amount of waste textiles generated is increasing daily, of which polyester and its blends with cotton and spandex account for a large proportion. Recycling and reusing polyester fibers from waste textiles to produce recycled polyester fibers for spinning is an important way to achieve resource recycling and environmental protection.

[0003] Reference patent (CN221232924U) discloses a waste textile recycled fiber production equipment, relating to the field of textile machinery manufacturing technology. This utility model includes a base, with a main body positioned above the base. The base is equipped with a shredding mechanism, a support mechanism, and a conveying mechanism. The shredding mechanism includes a first drive assembly and two shredding components. The drive assembly includes a first feed inlet located at the top of the main body. A first motor is fixedly mounted on the right side of the main body. Two first rotating shafts are rotatably mounted within the main body, both penetrating the main body. The ends of the corresponding first rotating shafts are fixedly connected to the output shaft of the first motor. This waste textile recycled fiber production equipment, equipped with the shredding mechanism, support mechanism, and conveying mechanism, can shred waste textiles into small fragments, enabling the recycling of waste textiles.

[0004] Based on the aforementioned patents, waste textiles, especially elastic blended fabrics, often appear in clumps or curled-up states during the initial recycling stage, with fibers entangled and knotted together. Traditional feeding devices often use simple conveyor belts or hoppers to directly feed the material into the crushing mechanism, lacking effective pre-dispersion and kneading structures. The material lacks effective drag tension within the chamber, leading to accumulation and blockage during subsequent processing, affecting crushing uniformity and production efficiency. Furthermore, for elastic fabrics blended with polyester, cotton, and spandex fibers, existing technologies generally employ high-temperature hot air or steam softening methods in the pretreatment stage to loosen the fibers for easier processing. Subsequent processing is problematic. High-temperature treatment exceeding 80°C can easily cause polyester fibers to melt, stick together, and deform, losing their original spinning properties and resulting in raw material waste. At the same time, although spandex fibers can shrink at high temperatures, cotton fibers shrink and clump together in the dry hot air, resulting in extremely poor separation from polyester. In addition, the elastic recovery characteristics of spandex cause the cut elastic fabric fragments to spring back and deform, leading to inconsistent cutting dimensions and irregular shapes of the broken materials, further increasing the difficulty of subsequent processing. This invention provides a recycled polyester fiber spinning equipment and method based on the recycling of waste textiles. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a recycled polyester fiber spinning equipment and method based on the recycling of waste textiles. It solves the problem that traditional feeding devices often use simple conveyor belts or hoppers to directly feed materials into the crushing mechanism, lacking effective pre-dispersion and kneading structures. As a result, the materials lack effective drag tension in the cavity, leading to material accumulation and blockage in subsequent processing, which affects the uniformity of crushing and production efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a recycled polyester fiber spinning device based on the recycling of waste textiles, comprising a housing, wherein the housing is equipped with a recycling mechanism for spinning recycled polyester fibers from waste textiles, the recycling mechanism comprising: The feeding assembly includes a feeding body mounted on the upper end of the housing, a feeding housing fixed inside the feeding body, annular tubes evenly distributed on the outer wall of the feeding housing, nozzles evenly distributed inside the annular tubes, a guide tube horizontally arranged on the rear side of the feeding body, a hot air blower connected to one end of the guide tube, a water tank arranged at the upper end of the guide tube, a fixed housing fixed by a support rod inside the feeding housing, a first kneading shaft and a second kneading shaft connected by a bevel gear assembly at the upper and lower ends of the fixed housing, a pair of mounting brackets connected by a telescopic assembly at the upper end of the feeding housing, and a transmission belt vertically arranged inside the mounting brackets; The crushing assembly includes a first shearing shell, a second shearing shell, and a third shearing shell installed sequentially from top to bottom inside the mounting housing. The first shearing shell, the second shearing shell, and the third shearing shell are respectively provided with a first blade shaft, a second blade shaft, and a third blade shaft. One end of the blade shaft is provided with a gear set for transmission, and a fan body is provided on the rear side of the shearing shell.

[0007] Preferably, a vertical tube is fixed to one end of the conduit near the feed housing, and multiple sets of annular tubes are distributed along the vertical direction of the vertical tubes, with the annular tubes and vertical tubes in a flow connection. A set of temperature sensors for temperature detection is provided on the outer wall of the feed housing.

[0008] Preferably, the bevel gear assembly includes a drive shaft that is connected through one side of the fixed housing. One end of the drive shaft is provided with a first motor for driving. The first motor is fixed to the outer wall of the feeding body. One end of the drive shaft extending into the fixed housing is fixed with a third bevel gear. The first kneading shaft and the second kneading shaft are respectively installed at the upper and lower ends of the fixed housing via vertical shafts. The first kneading shaft and the second kneading shaft are respectively provided with a first bevel gear and a second bevel gear at the ends of the first kneading shaft and the second kneading shaft near the third bevel gear.

[0009] Preferably, the upper ends of the first bevel gear and the third bevel gear are meshed together to drive the first kneading shaft to rotate, and the lower ends of the second bevel gear and the third bevel gear are meshed together to drive the second kneading shaft to rotate.

[0010] Preferably, the telescopic assembly includes an L-shaped bracket fixed to both sides of the feed housing, an electric push rod fixed through the upper end of the L-shaped bracket, a slide rod fixed to the telescopic end of the electric push rod, a mounting bracket fixedly connected to one end of the slide rod, a mounting shaft provided inside the mounting bracket, a transmission belt tightly fitted to the outer wall of the mounting shaft, a micro motor for driving provided at one end of the mounting shaft, and rubber plugs distributed on the outer wall of the transmission belt.

[0011] Preferably, the outer wall of the slide bar is provided with a fixing block, the fixing block is fixedly connected to both sides of the feed housing, and the slide bar is slidably connected to the fixing block.

[0012] Preferably, connecting plates are fixed on both sides of the mounting bracket, and a guide plate is fixed on one end of the connecting plate.

[0013] Preferably, the first, second, and third shearing shells are connected in a flow-through structure, the first, second, and third blade shafts are spiral blade structures, a protective shell is fixed to one side of the mounting shell, the gear set is located inside the protective shell, the gear set includes three sets of transmission gears, the three sets of transmission gears are meshed and connected to the first, second, and third blade shafts respectively, the size of the three sets of transmission gears increases sequentially from top to bottom, and a second motor for driving the gear set is provided on the outer wall of the protective shell.

[0014] Preferably, the first, second, and third shearing shells are provided with a discharge shell at their front ends, a collection shell is fixed to the front end of the discharge shell, a hinged plate connected by bolts is provided at the front end of the collection shell, a baffle is provided at the upper end of the collection shell, and an air inlet shell is provided on the symmetrical side of the first, second, and third shearing shells located on the discharge shell, and the fan body is mounted on the air inlet shell.

[0015] This invention also provides a method for spinning recycled polyester fibers based on the recycling of waste textiles, comprising the following steps: Step 1: Place the waste textiles along the guide plate. The first motor drives the first kneading shaft and the second kneading shaft to knead and tear them in opposite directions, breaking the clumps into single fiber bundles. Step 2: The hot air blower sprays hot air into the nozzle through the duct, vertical pipe, and ring pipe. The water tank sprays water simultaneously, and the temperature sensor controls the temperature in real time, so that the spandex shrinks and loses its elasticity, the cotton fiber becomes fluffy, and the polyester softens and does not melt. Step 3: Loose fibers pass through the first and third sheared outer shells. The second motor drives the gear set to reduce the speed of the first and third blade shafts. The main body of the blower, in conjunction with low-pressure, medium-pressure, and high-pressure air, achieves the cleaning of floating debris, the stripping of cotton and ammonia, and the removal of ultrafine fibers.

[0016] This invention provides equipment and method for spinning recycled polyester fibers based on the recycling of waste textiles. Compared with the prior art, it has the following advantages: Firstly, the operator places the waste textiles between the guide plates. The electric push rod extends and retracts, causing the slide bar to slide along the fixed block. The distance between the two sets of mounting brackets is adjusted to accommodate textiles of different thicknesses. The two sets of transmission belts are driven by micro motors through the mounting shaft, rotating in opposite directions. The rubber plugs on the outer wall of the transmission belts engage the fabric fibers, pulling and dispersing the textiles relative to each other along the width direction. After being loosened, the textiles fall into the inside of the feeding shell. Then, the first motor is fixed to the outer wall of the feeding body and drives the drive shaft to rotate. The third bevel gear at the end of the drive shaft simultaneously engages with the first bevel gear at the upper end and the second bevel gear at the lower end. The gears mesh, driving the first and second kneading shafts to rotate in opposite directions. Inside the fixed housing, the two kneading shafts knead and tear the textiles that fall in, further breaking down the clumps of fabric into single fibers or small fiber bundles. This solves the problems of tangling, clumping, and curling of waste textiles, keeping the material in a loose state and greatly improving the uniformity of subsequent crushing and processing. At the same time, the hot air blower delivers airflow into the feed housing through ducts, ring pipes, and nozzles. The water tank can spray a small amount of liquid through a micro pump and nozzles for better pretreatment of the loosened fiber material.

[0017] Secondly, the hot air generated by the hot air blower of this invention enters the vertical pipe through a duct, then is distributed to multiple sets of annular pipes, and finally is evenly sprayed into the inside of the feeding shell through nozzles. At the same time, the water tank sprays liquid into the chamber through the same set of nozzles via a micro pump. The temperature sensor monitors the temperature inside the chamber in real time, and the program temperature control module strictly controls the temperature of the hot air. When the spandex is heated, it relaxes and shrinks, losing its elasticity. The cotton fibers absorb water and become fluffy and bulging, increasing the tendency to separate from the polyester. The polyester only releases internal stress and softens, without melting. Low-temperature damp heat treatment will not cause the polyester fibers to melt or deteriorate at high temperatures, thus completely preserving the original properties of the polyester fibers. By improving spinning performance and eliminating the problem of raw material waste caused by high-temperature pretreatment, the elastic rebound characteristics of blended elastic fabrics are eliminated through differentiated physical property modification. This addresses the root cause of the elastic deformation after cutting and crushing in traditional processing, as well as the differentiated states of spandex shrinkage, cotton fiber fluffiness, and polyester softening. This allows for more thorough separation of cotton and spandex impurities from polyester fibers in subsequent crushing processes, significantly improving the purity and quality of recycled polyester fibers. It achieves differentiated control of the physical properties of the three fibers, with spandex shrinking and losing elasticity, cotton fibers absorbing water and becoming fluffy, and polyester softening due to stress release, enabling efficient separation of blended waste textiles.

[0018] Thirdly, the loose fibrous material after being kneaded enters the first shearing shell. The second motor drives three sets of transmission gears within the gear set to mesh and operate. Since the size of the three gears increases sequentially from top to bottom, according to the gear transmission principle, the speed of the first blade shaft is greater than that of the second blade shaft, which is greater than that of the third blade shaft. The material is first sheared at high speed by the first blade shaft for coarse crushing, then at medium speed by the second blade shaft for medium crushing, and finally at low speed by the third blade shaft for fine crushing. The blower body is installed on the air inlet shell, generating a horizontal airflow. The fastest rotating and low-pressure air mainly cleans up floating impurities. The process involves removing dust and short threads, using medium speed and medium pressure air to separate cotton from spandex fibers. The slowest speed and high pressure air further removes ultrafine fibers, resulting in purer recycled polyester fibers. The three-stage blade shaft features a decreasing speed design, creating forward material drag tension within the horizontal cavity. This completely solves the problems of material slippage, accumulation, and backflow in traditional crushers, ensuring continuous and stable feeding. Through the three-stage differential speed blade shaft and graded air pressure, the process achieves progressive separation of floating impurities, cotton-ammonia separation, and ultrafine fiber removal under material tension, ultimately yielding high-quality recycled polyester fibers. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a structural diagram of the internal structure of the feed body of the present invention; Figure 3 This is a schematic diagram of the annular tube structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the feed housing of the present invention; Figure 5 This is a schematic diagram of the first kneading shaft and the second kneading shaft of the present invention; Figure 6 This is a schematic diagram of the internal structure of the fixed outer shell of the present invention; Figure 7 This is a schematic diagram of the fixing block structure of the present invention; Figure 8 This is a schematic diagram of the transmission belt structure of the present invention; Figure 9 This is a schematic diagram of the outer shell structure of the present invention; Figure 10 This is a schematic diagram of the protective outer shell structure of the present invention; Figure 11 This is a schematic diagram of the internal structure of the first shearing shell of the present invention; Figure 12 This is a schematic diagram of the air inlet housing structure of the present invention.

[0020] In the diagram: 1. Housing; 2. Feeding body; 201. Feeding housing; 202. Annular pipe; 203. Nozzle; 204. Hot air blower; 205. Conduit; 206. Vertical pipe; 207. Water tank; 208. Temperature sensor; 3. Fixed housing; 301. First kneading shaft; 302. First bevel gear; 303. Second kneading shaft; 304. Second bevel gear; 305. Drive shaft; 306. Third bevel gear; 307. First motor; 4. L-shaped bracket; 401. Electric push rod; 402. Slide rod; 40 3. Mounting bracket; 404. Fixing block; 405. Mounting shaft; 406. Transmission belt; 407. Connecting plate; 408. Guide plate; 5. First shearing shell; 501. Second shearing shell; 502. Third shearing shell; 503. First blade shaft; 504. Second blade shaft; 505. Third blade shaft; 506. Protective shell; 507. Second motor; 508. Gear set; 6. Discharge shell; 601. Collection shell; 602. Opening and closing plate; 603. Baffle; 604. Air inlet shell; 605. Fan body. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1 to 12 This invention provides the following three technical solutions. First implementation: A recycled polyester fiber spinning device based on the recycling of waste textiles, including a mounting shell 1, on which a recycling mechanism for spinning recycled polyester fibers from waste textiles is provided, the recycling mechanism including: The feeding assembly includes a feeding body 2 mounted on the upper end of the mounting housing 1. A feeding housing 201 is fixed inside the feeding body 2. Annular tubes 202 are evenly distributed on the outer wall of the feeding housing 201. Nozzles 203 are evenly distributed inside the annular tubes 202. A guide tube 205 is horizontally arranged on the rear side of the feeding body 2. One end of the guide tube 205 is connected to a hot air blower 204. A water tank 207 is arranged at the upper end of the guide tube 205. A fixed housing 3, fixed by a support rod, is arranged inside the feeding housing 201. A first kneading shaft 301 and a second kneading shaft 303 are connected by a bevel gear assembly at the upper and lower ends of the fixed housing 3. A pair of mounting brackets 403 connected by a telescopic assembly are arranged at the upper end of the feeding housing 201. A transmission belt 406 is vertically arranged inside the mounting brackets 403. The crushing assembly includes a first shearing shell 5, a second shearing shell 501, and a third shearing shell 502 installed sequentially from top to bottom inside the mounting shell 1. The first shearing shell 5, the second shearing shell 501, and the third shearing shell 502 are respectively provided with a first blade shaft 503, a second blade shaft 504, and a third blade shaft 505. A gear set 508 is provided at one end of the blade shaft for transmission, and a fan body 605 is provided at the rear side of the shearing shell.

[0023] In this embodiment of the invention, the bevel gear assembly includes a drive shaft 305 that is connected through one side of the fixed housing 3. One end of the drive shaft 305 is provided with a first motor 307 for driving. The first motor 307 is fixed to the outer wall of the feeding body 2. One end of the drive shaft 305 extending into the fixed housing 3 is fixed with a third bevel gear 306. A first kneading shaft 301 and a second kneading shaft 303 are respectively installed at the upper and lower ends of the fixed housing 3 via vertical shafts. A first bevel gear 302 and a second bevel gear 304 are respectively provided at the ends of the first kneading shaft 301 and the second kneading shaft 303 near the third bevel gear 306. The first bevel gear 302 is meshed with the upper end of the third bevel gear 306 to drive the first kneading shaft 301 to rotate. The second bevel gear 304 is meshed with the lower end of the third bevel gear 306 to drive the second kneading shaft 303 to rotate.

[0024] In this embodiment of the invention, the telescopic assembly includes an L-shaped bracket 4 fixed to both side walls of the feed housing 201. An electric push rod 401 is fixedly fixed through the upper end of the L-shaped bracket 4. A slide rod 402 is fixed to the telescopic end of the electric push rod 401. A mounting bracket 403 is fixedly connected to one end of the slide rod 402. A mounting shaft 405 is provided inside the mounting bracket 403. A transmission belt 406 is tightly fitted to the outer wall of the mounting shaft 405. A micro motor for driving is provided at one end of the mounting shaft 405. Rubber bolts are distributed on the outer wall of the transmission belt 406. A fixing block 404 is provided on the outer wall of the slide rod 402. The fixing block 404 is fixedly connected to both sides of the feed housing 201, and the slide rod 402 is slidably connected to the fixing block 404. Connecting plates 407 are fixed to both sides of the mounting bracket 403. A guide plate 408 is fixed to one end of the connecting plate 407.

[0025] Specifically, the telescopic component controls the relative spacing between the two sets of transmission belts 406. The old textiles are placed between the guide plates 408, and the two sets of transmission belts 406 rotate in opposite directions, which can relatively disperse the old textiles. Then, they fall into the feed housing 201. With the opposite rotation of the first kneading shaft 301 and the second kneading shaft 303, the old textiles are further dispersed and opened up.

[0026] In the specific operation, the operator puts the waste textiles between the guide plates 408. The electric push rod 401 extends and retracts, driving the slide rod 402 to slide along the fixed block 404. The distance between the two sets of mounting brackets 403 is adjusted to accommodate textiles of different thicknesses. The two sets of transmission belts 406 are driven by a micro motor through the mounting shaft 405 and rotate in opposite directions. The rubber plugs on the outer wall of the transmission belts 406 engage the fabric fibers, pulling and dispersing the textiles relative to each other along the width direction. After being loosened, the textiles fall into the inside of the feeding shell 201. Furthermore, the first motor 307 is fixed to the outer wall of the feeding body 2 and drives the drive shaft 305 to rotate. The third bevel gear 306 at the end of the drive shaft 305 meshes with the first bevel gear 302 at the upper end and the second bevel gear 304 at the lower end, respectively driving the first kneading shaft 301 and the second kneading shaft 303 to rotate in opposite directions. The two kneading shafts knead and tear the textile falling into the fixed outer shell 3 in opposite directions, further breaking the clump of fabric into single fibers or small fiber bundles.

[0027] The second implementation method differs from the first implementation method in that: a vertical pipe 206 is fixed at one end of the conduit 205 near the feed housing 201, and multiple sets of annular pipes 202 are distributed along the vertical direction of the vertical pipes 206, and the annular pipes 202 and the vertical pipes 206 are in a flow connection. A set of temperature sensors 208 for temperature detection is provided on the outer wall of the feed housing 201. Hot air is sent into the feed housing 201 through the hot air blower 204 and the nozzle 203, and the water tank 207 sends liquid into the feed housing 201 through the nozzle 203 via a micro pump. In this method, a programmable temperature control module and temperature sensors 208 are set to control the heating range and maintain a low temperature hot air output of 45-55℃, so as to realize the differentiated physical property modification of polyester, cotton fiber and spandex as the three base materials in waste blended textiles. By introducing low-humidity hot air at 45-55℃ and keeping the moisture content moist, the polyester is not melted at high temperature. Instead, the spandex in the blended fabric relaxes and shrinks when heated, and the cotton fibers absorb water and become fluffy and bulging. The internal stress of the polyester fabric is released when heated, and the fabric softens, eliminating elastic rebound. This solves the problem of elastic fabric rebound and uneven cutting from the root.

[0028] Specifically, the hot air generated by the hot air blower 204 enters the vertical pipe 206 through the duct 205, then is distributed to multiple sets of annular pipes 202, and finally is evenly sprayed into the inside of the feed housing 201 by the nozzles 203. At the same time, the water tank 207 sprays liquid into the same set of nozzles 203 through a micro pump. The temperature sensor 208 monitors the temperature inside the chamber in real time, and the program temperature control module strictly controls the hot air at 45-55℃. When the spandex is heated, it relaxes and shrinks, losing its elasticity. The cotton fibers absorb water and become fluffy and bulging, increasing the tendency to separate from the polyester. The polyester only releases internal stress and softens, without melting.

[0029] The third embodiment differs from the first and second embodiments in that: the first shearing shell 5, the second shearing shell 501, and the third shearing shell 502 have a flow-through structure; the first blade shaft 503, the second blade shaft 504, and the third blade shaft 505 have a spiral blade structure; a protective shell 506 is fixed to one side of the mounting shell 1; a gear set 508 is located inside the protective shell 506; the gear set 508 includes three sets of transmission gears, which are meshed and connected to each other, and are respectively connected to the first blade shaft 503, the second blade shaft 504, and the third blade shaft 505; the size of the three sets of transmission gears increases sequentially from top to bottom; a second motor 507 for driving the gear set 508 is provided on the outer wall of the protective shell 506; and a discharge shell 6 is provided at the front end of the first shearing shell 5, the second shearing shell 501, and the third shearing shell 502. A collection shell 601 is fixed to the front end of the discharge shell 6. An opening and closing plate 602 connected by bolts is provided at the front end of the collection shell 601. A baffle 603 is provided at the upper end of the collection shell 601. An air inlet shell 604 is provided on the symmetrical side of the discharge shell 6, where the first shearing shell 5, the second shearing shell 501, and the third shearing shell 502 are located. The blower body 605 is installed on the air inlet shell 604. The horizontal flow is three-stage segmented shearing. With the cavity length partitioning, progressive crushing is achieved. The first blade shaft 503 has the fastest speed and forms low-pressure air with the blower to clean floating impurities. The second blade shaft 504 has a medium speed and forms medium-pressure air with the blower to remove cotton and ammonia. The third blade shaft 505 has the lowest speed and forms high-pressure air to remove ultrafine fibers. The front-stage speed is greater than the rear-stage speed, forming a forward material drag tension from front to back, so that the material always maintains a taut and forward-flowing state in the horizontal cavity, preventing slippage, accumulation, and stagnation.

[0030] Specifically, the loose fibrous material after being kneaded enters the first shearing shell 5. The second motor 507 drives the three sets of transmission gears in the gear set 508 to mesh and operate. Since the size of the three sets of gears increases from top to bottom, according to the gear transmission principle, the speed of the first blade shaft 503 is greater than that of the second blade shaft 504, which is greater than that of the third blade shaft 505. The material is first sheared at high speed by the first blade shaft 503 to achieve coarse crushing, then sheared at medium speed by the second blade shaft 504 to achieve medium crushing, and finally sheared at low speed by the third blade shaft 505 to achieve fine crushing. The blower body 605 is installed on the air inlet shell 604 to generate horizontal airflow. The fastest speed and low pressure air mainly cleans floating impurities, surface dust, and short threads. The medium speed and medium pressure air achieve cotton-ammonia separation, separating cotton fibers from spandex. The slowest speed and high pressure air further removes ultrafine fibers to obtain relatively pure recycled polyester fibers, which are then used for spinning.

[0031] The discharged impurities are separated and collected by the collection shell 601.

[0032] Additional information: The first motor is a YE2-90L-4 three-phase asynchronous motor, the second motor is a YE2-100L2-4 three-phase asynchronous motor, the micro motor is a 3IK15GN-C micro speed-regulating motor, and it uses a DTZ-50-100 industrial DC electric actuator, a JR-3380 industrial hot and cold air blower, supporting precise temperature control from 40 to 60℃, suitable for the 45 to 55℃ low-temperature damp heat modification process of this equipment, dustproof and moisture-proof, DC24V-12W micro booster pump, uniform water output and controllable flow, matching the micro-spray humidification requirements of the nozzles, a DFB-250 multi-blade centrifugal fan, a PT100 platinum resistance thermometer, and an XMTD-2001 intelligent digital display temperature controller, supporting PT100 signal input, setting constant temperature range, realizing closed-loop precise control of hot air temperature, and is equipped with an FX3U-16MR Mitsubishi programmable controller.

[0033] This invention also provides a method for spinning recycled polyester fibers based on the recycling of waste textiles, comprising the following steps: Step 1: Place the waste textiles along the guide plate 408. The first motor 307 drives the first kneading shaft 301 and the second kneading shaft 303 to knead and tear the textiles in opposite directions, breaking the clumps into single fiber bundles. Specifically, the operator places the waste textiles between the guide plates 408. The electric push rod 401 extends and retracts, causing the slide rod 402 to slide along the fixed block 404. The distance between the two sets of mounting brackets 403 is adjusted to accommodate textiles of different thicknesses. The two sets of transmission belts 406 are driven by a micro motor through the mounting shaft 405, rotating in opposite directions. The rubber plugs on the outer wall of the transmission belts 406 engage the textile fibers. The textile is pulled and dispersed along its width, and then falls into the feed housing 201. The first motor 307 is fixed to the outer wall of the feed body 2 and drives the drive shaft 305 to rotate. The third bevel gear 306 at the end of the drive shaft 305 meshes with the first bevel gear 302 at the upper end and the second bevel gear 304 at the lower end, respectively driving the first kneading shaft 301 and the second kneading shaft 303 to rotate in opposite directions. The two kneading shafts knead and tear the textile falling into the fixed housing 3 in opposite directions, further breaking the clump of fabric into single fibers or small fiber bundles. Step 2: Hot air is sprayed into the hot air machine 204 through the conduit 205, vertical pipe 206, and ring pipe 202 via the nozzle 203. The water tank 207 sprays simultaneously, and the temperature sensor 208 controls the temperature in real time, so that the spandex shrinks and loses elasticity, the cotton fiber becomes fluffy, and the polyester softens and does not melt. Step 3: Loose fibers pass through the first shearing shell 5 to the third shearing shell 502. The second motor 507 drives the gear set 508 to reduce the speed of the first blade shaft 503 to the third blade shaft 505. The blower body 605, in conjunction with low-pressure, medium-pressure and high-pressure air, realizes the cleaning of floating debris, cotton and ammonia stripping, and removal of ultrafine fibers.

[0034] Working principle: The operator puts the waste textiles into the guide plate 408. The electric push rod 401 drives the slide rod 402 to adjust the distance between the two sets of mounting brackets 403. The two sets of transmission belts 406 rotate in opposite directions under the drive of the micro motor. The outer wall rubber plugs disperse the fabric relatively. After loosening, the fabric falls into the feeding shell 201. Then, the first motor 307 drives the drive shaft 305 and the third bevel gear 306, and at the same time drives the first bevel gear 302 and the second bevel gear 304, so that the first kneading shaft 301 and the second kneading shaft 303 rotate in opposite directions, kneading and tearing the material in opposite directions, and further breaking it into fiber bundles. Meanwhile, the hot air blower 204 and water tank 207 introduce low-humidity hot air (45-55°C) into the feed housing 201 via conduit 205, vertical pipe 206, multiple sets of annular pipes 202, and nozzles 203. Temperature sensor 208, in conjunction with a temperature control module, maintains this temperature range, causing the spandex to relax and shrink, eliminating its elasticity; cotton fibers to absorb water and become fluffy and bulging; and polyester to release internal stress and soften. The material then sequentially enters the first shearing housing 5, the second shearing housing 501, and the third shearing housing 502. The second motor 507 drives the gear set 508. The three sets of transmission gears with progressively increasing dimensions ensure that the first blade shaft 503 rotates at the fastest speed, the second blade shaft 504 rotates at a medium speed, and the third blade shaft 505 rotates at the slowest speed. This creates a forward drag tension where the speed of the preceding stage is greater than that of the following stage. The material remains taut and flows forward within the horizontal cavity. At the same time, the blower body 605 generates graded air pressure in a horizontal direction. The first stage low-pressure air cleans up floating impurities, the second stage medium-pressure air assists in the stripping of cotton and ammonia, and the third stage high-pressure air removes ultrafine fibers, resulting in relatively pure recycled polyester fibers. The discharged impurities are collected by the collection shell 601.

[0035] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] 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. A recycled polyester fiber spinning device based on the recycling of waste textiles, comprising an installation housing (1), characterized in that: The mounting housing (1) is equipped with a recycling mechanism for recycling waste textiles and spinning recycled polyester fibers. The recycling mechanism includes: The feeding assembly includes a feeding body (2) provided at the upper end of the mounting shell (1), a feeding shell (201) fixed inside the feeding body (2), annular tubes (202) evenly distributed on the outer wall of the feeding shell (201), nozzles (203) evenly distributed inside the annular tubes (202), a guide tube (205) horizontally provided on the rear side of the feeding body (2), a hot air blower (204) connected to one end of the guide tube (205), a water tank (207) provided at the upper end of the guide tube (205), a fixed shell (3) fixed by a support rod provided inside the feeding shell (201), a first kneading shaft (301) and a second kneading shaft (303) connected by a bevel gear assembly provided at the upper and lower ends of the fixed shell (3), a pair of mounting brackets (403) connected by a telescopic assembly provided at the upper end of the feeding shell (201), and a transmission belt (406) vertically provided inside the mounting brackets (403). The crushing assembly includes a first shearing shell (5), a second shearing shell (501), and a third shearing shell (502) installed sequentially from top to bottom inside the housing (1). The first shearing shell (5), the second shearing shell (501), and the third shearing shell (502) are respectively provided with a first blade shaft (503), a second blade shaft (504), and a third blade shaft (505). A gear set (508) is provided at one end of the blade shaft for transmission, and a blower body (605) is provided on the rear side of the shearing shell.

2. The recycled polyester fiber spinning equipment based on the recycling of waste textiles according to claim 1, characterized in that: The conduit (205) is fixed with a vertical tube (206) at one end near the feed housing (201). Multiple sets of annular tubes (202) are distributed along the vertical direction of the vertical tubes (206), and the annular tubes (202) and the vertical tubes (206) are in a flow connection. A set of temperature sensors (208) for temperature detection is provided on the outer wall of the feed housing (201).

3. The recycled polyester fiber spinning equipment based on the recycling of waste textiles according to claim 1, characterized in that: The bevel gear assembly includes a drive shaft (305) that is connected through one side of the fixed housing (3). One end of the drive shaft (305) is provided with a first motor (307) for driving. The first motor (307) is fixed to the outer wall of the feeding body (2). The drive shaft (305) extends into the interior of the fixed housing (3) and a third bevel gear (306) is fixed at one end. The first kneading shaft (301) and the second kneading shaft (303) are respectively installed at the upper and lower ends of the fixed housing (3) through vertical shafts. The first kneading shaft (301) and the second kneading shaft (303) are respectively provided with a first bevel gear (302) and a second bevel gear (304) at the end of the first kneading shaft (301) and the second kneading shaft (303) near the third bevel gear (306).

4. The recycled polyester fiber spinning equipment based on the recycling of waste textiles according to claim 3, characterized in that: The first bevel gear (302) meshes with the upper end of the third bevel gear (306) to drive the first kneading shaft (301) to rotate, and the second bevel gear (304) meshes with the lower end of the third bevel gear (306) to drive the second kneading shaft (303) to rotate.

5. The recycled polyester fiber spinning equipment based on the recycling of waste textiles according to claim 1, characterized in that: The telescopic assembly includes an L-shaped bracket (4) fixed to both sides of the feed housing (201). An electric push rod (401) is fixed through the upper end of the L-shaped bracket (4). A slide rod (402) is fixed to the telescopic end of the electric push rod (401). A mounting bracket (403) is fixedly connected to one end of the slide rod (402). A mounting shaft (405) is provided inside the mounting bracket (403). A transmission belt (406) is tightly fitted to the outer wall of the mounting shaft (405). A micro motor for driving is provided at one end of the mounting shaft (405). Rubber plugs are distributed on the outer wall of the transmission belt (406).

6. The recycled polyester fiber spinning equipment based on the recycling of waste textiles according to claim 5, characterized in that: The outer wall of the slide bar (402) is provided with a fixing block (404), the fixing block (404) is fixedly connected to both sides of the feed housing (201), and the slide bar (402) and the fixing block (404) are slidably connected.

7. The recycled polyester fiber spinning equipment based on the recycling of waste textiles according to claim 1, characterized in that: The mounting bracket (403) has connecting plates (407) fixed on both sides, and a guide plate (408) is fixed at one end of the connecting plate (407).

8. The recycled polyester fiber spinning equipment based on the recycling of waste textiles according to claim 1, characterized in that: The first shearing shell (5), the second shearing shell (501), and the third shearing shell (502) have a flow structure. The first blade shaft (503), the second blade shaft (504), and the third blade shaft (505) have a spiral blade structure. A protective shell (506) is fixed on one side of the mounting shell (1). The gear set (508) is located inside the protective shell (506). The gear set (508) includes three sets of transmission gears. The three sets of transmission gears are meshed and connected to each other. The three sets of transmission gears are respectively connected to the first blade shaft (503), the second blade shaft (504), and the third blade shaft (505). The size of the three sets of transmission gears increases from top to bottom. A second motor (507) for driving the gear set (508) is provided on the outer wall of the protective shell (506).

9. The recycled polyester fiber spinning equipment based on the recycling of waste textiles according to claim 1, characterized in that: The first shearing shell (5), the second shearing shell (501) and the third shearing shell (502) are provided with a discharge shell (6) at their front ends. A collection shell (601) is fixed to the front end of the discharge shell (6). A hinged plate (602) connected by bolts is provided to the front end of the collection shell (601). A baffle (603) is provided at the upper end of the collection shell (601). An air inlet shell (604) is provided on the symmetrical side of the discharge shell (6) of the first shearing shell (5), the second shearing shell (501) and the third shearing shell (502). The fan body (605) is installed on the air inlet shell (604).

10. A method for spinning recycled polyester fibers based on the recycling of waste textiles, applicable to the recycled polyester fiber spinning equipment based on the recycling of waste textiles as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Place the waste textiles along the guide plate (408), and the first motor (307) drives the first kneading shaft (301) and the second kneading shaft (303) to knead and tear them in opposite directions, breaking the clumps into single fiber bundles; Step 2: The hot air blower (204) sprays hot air into the nozzle (203) through the conduit (205), vertical pipe (206), and ring pipe (202), and the water tank (207) sprays hot air simultaneously. The temperature sensor (208) controls the temperature in real time, so that the spandex shrinks and loses elasticity, the cotton fiber becomes fluffy, and the polyester softens and does not melt. Step 3: Loose fibers pass through the first sheared shell (5) to the third sheared shell (502). The second motor (507) drives the gear set (508) to reduce the speed of the first blade shaft (503) to the third blade shaft (505). The blower body (605) works with low pressure, medium pressure and high pressure air to clean floating debris, strip cotton and ammonia, and remove ultrafine fibers.

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