Yarn feeding device for the spiral spinning machine and method of controlling this device.

Abstract

This invention relates to a yarn feeding device for a vortex spinning machine and a method for controlling this device, and belongs to the field of spinning machine engineering. The yarn feeding device includes a yarn feeding mechanism and a yarn feeding mechanism. The yarn feeding mechanism is used to feed elastic yarn. The yarn feeding mechanism includes a drive unit and a yarn feeding unit. The yarn feeding unit works in conjunction with the yarn feeding mechanism to pull the structure on the elastic yarn tangentially to the yarn feeding mechanism. The drive unit is used to transmit motion to the yarn feeding unit to feed elastic yarn under the action of friction force, and the elastic yarn feeding speed is adjusted according to the outer yarn feeding speed. The yarn feeding device has a compact structure and good operating stability, is easy to operate, solves the problem of current vortex spinning machines being unable to spin spandex core yarn, and also solves the problem of difficulty in feeding yarn due to spandex yarn rebound in case of spandex yarn breakage.By combining the spandex yarn feeding speed with the cotton yarn feeding speed, the device can combine spandex and cotton yarns.

Description

Yarn feeding device for vortex spinning machine and control method thereof Technical Field

[0001] The present invention relates to the field of spinning machines, and in particular to a yarn feeding device for a vortex spinning machine and a control method thereof. Background Art

[0002] Vortex spinning is a new spinning method that uses a stationary vortex spinning tube to replace the high-speed rotating spinning cups, spindles, and wire travelers. The current vortex spinning process is as follows: fiber slivers are fed into the drafting system of the vortex spinning machine by cotton feed rollers. After being drafted, the fiber slivers are fed into the vortex tube at high speed through the cotton feed pipe with the help of air flow. A vortex-shaped airflow is generated in the vortex tube. When the upward rotating airflow reaches the core tube, it merges with the fibers entering the cotton feed pipe, forming a cohesive fiber ring along the inner wall of the vortex tube. This cohesive fiber ring rotates stably around the axis of the vortex tube at high speed, twisting the fibers into yarn. The yarn is continuously drawn out from the yarn guide hole by the draw-off roller and wound into a bobbin.

[0003] Core-spun yarn, also known as composite yarn or covered yarn, is a new type of yarn composed of two or more fibers. It typically uses a strong and elastic fiber as the core, and is covered with cotton, wool, viscose, or other fibers, twisted together. Core-spun yarn is produced by placing polyester filaments (or other filaments) on the roving frame of a conventional spinning frame, followed by cotton roving (or staple roving). The cotton roving is fed through the bell mouth of the traverse device and then passed through a drafting device. After being drawn out, the polyester filaments are directed to a collector behind the front rollers, bypassing the drafting device, where they are combined with the drafted pure cotton slivers and then twisted to form core-spun yarn.

[0004] When producing core-spun yarn using existing vortex spinning devices, after the core yarn enters the vortex spinning tube, it is rapidly stretched to its maximum elastic elongation range by airflow or tension rollers due to its different resilience compared to the outer yarn. This makes the core yarn prone to breakage, resulting in extremely low spinning efficiency and the inability to produce qualified core-spun yarn. Furthermore, once the core yarn breaks, its strong rebound force causes the yarn end to immediately become entangled in the yarn ball, making it difficult to find the yarn end and preventing fast yarn feeding, significantly reducing production efficiency. For example, the utility model patent with an application date of August 15, 2019 and application number 201921328969.6 includes a vortex spinning machine and a core wire guide device provided on the upper part of the vortex spinning machine; the vortex spinning machine includes a front roller and a front leather roller and a spindle that cooperate with the front roller; along the processing direction of the core wire raw material, the core wire guide device includes a core wire guide frame, a core wire tension disk, a core wire guide hook, a core wire tension control member, and a core wire airflow guide member in sequence; the core wire guide device is used to guide the core wire into the front roller and the front leather roller that cooperates with the front roller and enters the spindle together with the yarn on the vortex spinning machine. As mentioned above, since the core wire tension control member of the utility model patent will pull the core wire on the yarn drum, it is very easy to cause the core wire to break; at the same time, the core wire of the utility model patent is passively unwound. Once the core wire breaks, it is very easy to cause yarn mixing and stoppage, and the production efficiency is low. Summary of the Invention

[0005] The present invention mainly solves the deficiencies in the prior art and provides a yarn feeding device for a vortex spinning machine and a control method thereof, thereby solving the problem that the existing vortex spinning machine cannot spin core-spun yarn whose core yarn is an elastic yarn.

[0006] The above technical problems of the present invention are mainly solved by the following technical solutions:

[0007] A yarn feeding device for a vortex spinning machine includes a loading mechanism and a feed mechanism. The loading mechanism is used to load elastic yarn. The feed mechanism includes a drive assembly and a feed assembly. The feed assembly cooperates with the loading mechanism to tangentially stretch the elastic yarn. The drive assembly drives the feed assembly to feed the elastic yarn under the action of friction, and the feed speed of the elastic yarn is adapted to the feed speed of the outer sheath yarn. The feed assembly cooperates with the loading mechanism to stretch the elastic yarn tangentially, so that the feed assembly consistently applies friction to the elastic yarn. When the elastic yarn breaks, the elastic yarn is continuously fed tangentially under the action of friction, without rebounding and becoming entangled tangentially, thus resolving the difficulty of yarn feeding. By adapting the feed speed of the elastic yarn to the feed speed of the outer sheath yarn, the problem of existing vortex spinning machines being unable to spin core-spun yarn is resolved.

[0008] Preferably, the feeding mechanism includes an elastic yarn roller and a sliding assembly. The sliding assembly is connected to the elastic yarn roller, and the elastic yarn roller is moved by the sliding assembly to cooperate with the feed assembly during the feeding of the elastic yarn. As the elastic yarn is continuously fed, the diameter of the elastic yarn ball on the elastic yarn roller gradually decreases. The sliding assembly drives the elastic yarn roller to move, ensuring that the elastic yarn roller can always cooperate with the feed assembly.

[0009] Preferably, the sliding assembly includes a swing arm, a swing arm fixing member, and an elastic member. The elastic yarn roller is connected to the swing arm, which is movably connected to the swing arm fixing member. The elastic member is respectively connected to the swing arm and the swing arm fixing member. The elastic member is used to apply an elastic force to the swing arm. Under the action of the elastic force, the swing arm moves the elastic yarn roller, so that the elastic yarn roller cooperates with the feeding assembly. When the diameter of the elastic yarn ball changes, the feeding assembly temporarily disengages from the elastic yarn, creating space for the elastic yarn roller to move. The elastic member, through its own deformation, uses the elastic force to apply force to the elastic yarn roller, so that the elastic yarn roller can automatically cooperate with the feeding assembly without manual operation.

[0010] Preferably, the sliding assembly further comprises a swing arm stopper, the swing arm stopper being movably connected to the swing arm fixing member, and the swing arm rod being detachably engaged with the swing arm stopper to limit the position of the swing arm rod. The swing arm stopper can limit the position of the swing arm rod so that the swing arm rod's rotation angle conforms to the change in diameter of the elastic yarn ball.

[0011] Preferably, the swing arm limit block is movably connected to the swing arm fixing piece, the elastic piece is connected to the swing arm fixing piece via the swing arm limit block, and the swing arm rod is detachably matched with the swing arm limit block under the action of elastic force.

[0012] Preferably, the invention further comprises a locking assembly, which is detachably connected to the sliding assembly and is used to fix the sliding assembly. When the core yarn breaks, the elastic yarn roller needs to be driven away from the feeding assembly by the sliding assembly to complete the yarn feeding. The locking assembly fixes the sliding assembly, eliminating the need for manual fixation of the sliding assembly and reducing labor intensity.

[0013] Preferably, the locking assembly includes a hook member, a reset member and a hook fixing member, the reset member is arranged between the hook member and the hook fixing member, the hook member is movably connected to the hook fixing member through the reset member, and the hook member is used to fix the sliding assembly.

[0014] Preferably, it further comprises a feeding rack, the loading mechanism and the feeding mechanism are mounted on the feeding rack, and the feeding rack is provided with two or more feeding mechanisms, which are distributed in a staggered manner.

[0015] Preferably, it further comprises a yarn guide assembly, wherein the yarn guide assembly is distributed in a one-to-one correspondence with the feeding frame or is distributed with gaps and staggers.

[0016] A control method for a yarn feeding device for a vortex spinning machine, for operating the yarn feeding device for the vortex spinning machine, comprises the following steps:

[0017] Step 1: Push the elastic yarn roller on the swing arm to slide upward, so that the elastic yarn roller is separated from the active roller, and then the swing arm is clamped and fixed with the locking assembly.

[0018] Step 2: placing the elastic yarn onto the elastic yarn roller, pulling the elastic yarn from the elastic yarn roller through the yarn guide assembly, and completing the preparation process of feeding the elastic yarn of the elastic yarn roll into the vortex spinning machine.

[0019] Step 3: By pulling the locking assembly out of the swing arm, the elastic yarn roller slides downward under the action of its own gravity so that the elastic yarn roll is pressed against the active roller.

[0020] Step 4: Start the servo motor 3 to feed the elastic yarn into the vortex spinning machine. The feeding speed of the outer yarn is 2.5 to 3.5 times the feeding speed of the elastic yarn.

[0021] The present invention can achieve the following effects:

[0022] The present invention provides a yarn feeding device and control method for a vortex spinning machine. Compared with existing technologies, this device features a compact structure, excellent operational stability, and convenient operation. By adapting the feed speed of the elastic yarn to the feed speed of the outer yarn, the problem of existing vortex spinning machines being unable to spin core-spun yarn is resolved. A feed assembly cooperates with a loading mechanism to tangentially stretch the elastic yarn along the loading mechanism, ensuring that the feed assembly consistently applies friction to the elastic yarn. When the elastic yarn breaks, the friction forces the elastic yarn to continue feeding tangentially, preventing it from rebounding and becoming entangled in the tangential direction, thus resolving the difficulty of yarn feeding. This device is suitable for spinning and storing spandex yarn (i.e., 100% wt) and is also suitable for fully automatic vortex spinning. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] FIG1 is a front view schematic structural diagram of the present invention.

[0025] FIG2 is a side structural schematic diagram of the present invention.

[0026] FIG3 is a cross-sectional view of the structure of the present invention.

[0027] FIG4 is a schematic diagram of the installation structure of the loading mechanism and the feeding mechanism of the present invention.

[0028] FIG5 is a schematic diagram of the yarn feeding structure of the loading mechanism and the feeding mechanism of the present invention.

[0029] FIG6 is a schematic structural diagram of the spandex feeding mechanism of the present invention on the spinning frame.

[0030] FIG7 is a schematic structural diagram of the yarn guide assembly of the present invention.

[0031] Description of the labels: loading mechanism-1, feeding mechanism-2, servo motor-3, active roller-4, hook handle-5,

[0032] Feeding frame-6, elastic yarn roller-7, sliding assembly-8, swing arm-9, locking assembly-10, elastic member-11,

[0033] Swing arm limit block-12, swing arm fixing piece-13, hook piece-14, hook fixing piece-15, reset piece-16,

[0034] Pressing plate-17, pin-18, arc groove-19, spinning frame-20, yarn guide assembly-21, yarn feeding bracket-22,

[0035] Yarn guide-23, yarn detector-24, pneumatic manual button-25, air valve-26, yarn guide horn block-27,

[0036] Vortex spinning front roller-28, stop rod-29, tensioning roller-30. DETAILED DESCRIPTION

[0037] The technical solution of the invention is further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0038] Vortex spinning, also known as air-jet vortex spinning, operates on a vortex spinning machine. The drawn sliver is fed to the drafting mechanism. After being stretched by the roller drafting mechanism, the fiber bundle is ejected from the front roller jaws. Driven by an axial airflow at the inlet of the spinning nozzle, it travels along a spiral fiber guide channel into the spinning nozzle. A needle-shaped twist block is installed at the exit of the spiral fiber guide channel. This block bends the fiber bundle, keeping it untwisted, before being drawn into the vortex chamber. The leading end of the fiber bundle, pulled by the existing yarn, is drawn into the yarn channel within the spindle and twisted into the newly formed yarn, forming the yarn core. The trailing end of the fiber, held in the front roller jaws, remains in the fiber guide channel. When the tail end of the fiber is no longer held by the front roller jaws, it is centrifugally affected by the air vortex within the spinning nozzle and no longer remains within the fiber guide channel. Instead, it is radially dispersed by the rotating airflow at the spindle inlet. Driven by the air vortex, it falls onto the conical surface at the front end of the spindle, rotating with the air vortex, entangled with the subsequent yarn, and discharged through the yarn channel inside the spindle. The resulting yarn consists of a yarn core composed of approximately parallel, untwisted fibers and a spirally wrapped outer layer of fibers. The outer yarn feed portion of the vortex spinning machine in this embodiment can adopt the structure of existing devices, such as the VORTEX brand vortex spinning machine.

[0039] Embodiment: A yarn feeding device for a vortex spinning machine includes a loading mechanism 1 and a feeding mechanism 2. The loading mechanism 1 and feeding mechanism 2 can be mounted on the vortex spinning machine or separately secured by columns. Conventional mechanical mounting structures are commonly used, including removable and non-removable fixing structures, such as bolts, bearings, welding, and riveting. The relative position of the loading mechanism 1 and feeding mechanism 2 is arbitrary, including up and down, left and right, upper left and lower right, or lower left and upper right. The loading mechanism 1 is used to load elastic yarn and includes a rotating structure capable of receiving a yarn ball, such as a round roller, a trapezoidal roller, or a shaped roller. The feeding mechanism 2 comprises a drive assembly and a feeding assembly. The drive assembly is structured to drive the feeding assembly, and can be driven mechanically or manually. The mechanical drive power source can be a servo motor, a pneumatic cylinder, a linear module, or other structures. The feeding assembly is a yarn-grinding structure that cooperates with the loading mechanism. The feeding assembly is directly or indirectly connected to the drive assembly, and the two are connected using a conventional transmission structure in the mechanical field, such as a shaft, a belt, or a chain. The feeding assembly cooperates with the loading mechanism 1 to tangentially stretch the elastic yarn along the loading mechanism 1. The drive assembly is used to drive the feeding assembly, feeding the elastic yarn under the action of friction, and adjusting the feeding speed of the elastic yarn to the feeding speed of the outer yarn. In a specific embodiment, the feeding mechanism 1 is located at the upper left of the feeding mechanism 2. The feeding mechanism 1 and the feeding mechanism 2 are fixed on the vortex spinning machine. The feeding mechanism 1 adopts a round roller, the driving component adopts a servo motor 3, and the feeding component adopts a circular active roller 4. The servo motor 3 is connected to the active roller 4 through a driving shaft. The parameters of the servo motor 3 are adjusted by the electronic control system so that the servo motor 3 drives the active roller 4 to work at a certain speed. The elastic yarn is located between the active roller 4 and the feeding mechanism 1. The elastic yarn is fed under the action of friction. The feeding speed is adapted to the feeding speed of the outer yarn under the control of the active roller 4. Preferably, the feeding speed of the outer yarn is 2.5 to 3.5 times the feeding speed of the elastic yarn. For example, the feeding speed of the elastic yarn is 100 m / min to 160 m / min, and the feeding speed of the outer covering yarn is 350 m / min to 400 m / min. Since the elasticity of the outer covering yarn is lower than that of the elastic yarn, at this speed, when the outer covering yarn is stretched, the elastic yarn will not be stretched to the maximum elastic elongation range. While ensuring the elasticity of the core-spun yarn, the probability of breakage is reduced, thereby improving the quality of the core-spun yarn.

[0040] In one embodiment, the feeding frame 6 is further comprised. The driving assembly utilizes a servo motor 3, and the feeding assembly utilizes a driving roller 4. The servo motor 3 is connected to the driving roller 4 via a drive shaft. The feeding frame 6 is positioned between the servo motor 3 and the driving roller 4. The servo motor 3, the driving roller 4, and the feeding mechanism 1 are mounted on the feeding frame 6. Preferably, the feeding mechanism 1 comprises an elastic yarn roller 7 and a sliding assembly 8. The sliding assembly 8 is mounted on the feeding frame 6, and the elastic yarn roller 7 is connected to the sliding assembly 8 via a shaft. The driving roller 4 and the elastic yarn roller 7 in the same feeding frame 6 are staggered, and the driving roller 4 is driven by the servo motor 3. The feeding frame 6 is mounted on the spinning frame 20 in an intermittent manner. The spinning frame 20 is provided with a yarn guide assembly 21, which is arranged in a one-to-one correspondence with the feeding frame 6 or staggered with intervals.

[0041] In one embodiment, the feeding mechanism 1 includes an elastic yarn roller 7 and a sliding assembly 8. The elastic yarn roller 7 is used to receive the elastic yarn balls. The sliding assembly 8 is any structure capable of driving the elastic yarn roller 7, such as a cam, a reciprocating gear, a linear module, a multi-link structure, a crank slider structure, or a sprocket structure. The sliding assembly 8 is directly or indirectly connected to the elastic yarn roller 7. The sliding assembly 8 enables the elastic yarn roller 7 to slide as the radius changes when feeding the yarn balls, maintaining a rolling structure with the feeding mechanism 2 to feed the elastic yarn.

[0042] In a specific embodiment, the sliding assembly 8 includes a swing arm rod 9, a swing arm fixing part 13 and a swing arm limit block 12. The swing arm rod 9 can adopt a swing arm structure of any shape, such as an arc rod, a straight rod, a round rod, an S-shaped rod, etc. The swing arm fixing part 13 is an arbitrary structure, and its shape is arbitrary, such as a square, a cone, a truncated cone, etc. The swing arm rod 9 is movably connected to the swing arm rod 9, such as hinged, connected by a bearing, connected by a slider, connected by a chain, etc. The relative position of the swing arm fixing part 13 and the swing arm rod 9 is arbitrary, and the relative position can be up and down or left and right or upper left and lower right or lower left and upper right, etc. The shape of the swing arm limit block 12 is arbitrary, such as a square, a cone, a truncated cone, a U-shaped block, etc. The swing arm rod 9 is detachably matched with the swing arm limit block 12 to achieve the limitation of the swing arm rod 9; for example, a U-shaped groove is provided in the swing arm limit block 12, and a pin rod 18 sliding along the U-shaped groove is provided in the swing arm rod 9, and the pin rod 18 is against the bottom of the U-shaped groove for limiting; for another example, a magnet is provided on the swing arm limit block 12, and the swing arm rod 9 is automatically adsorbed for limiting after approaching the swing arm limit block 12; for another example, a pin hole is provided on the swing arm rod 9, and a spring pin is provided on the swing arm limit block 12, and the spring pin enters the pin hole to achieve limiting. Furthermore, the elastic yarn roller 7 is disposed at the end of the swing arm 9. A swing arm fixture 13 is provided on the inner wall of the feed frame 6. The swing arm 9 is hingedly connected to the swing arm fixture 13. An arcuate slot 19 is provided in the feed frame 6. The swing arm 9 slides along the arcuate slot 19. The sliding angle of the swing arm 9 is related to the radius of the elastic yarn ball. The swing arm fixture 13 is provided with a swing arm limit block 12 rotatably connected to the swing arm fixture 13. The swing arm limit block 12 has a U-shaped slot. The swing arm 9 is provided with a pin 18 that slides along the U-shaped slot. The pin 18 abuts against the bottom of the U-shaped slot for positioning. Preferably, the sliding angle of the swing arm 9 is 0 to 15 degrees. When the radius of the elastic yarn ball changes from maximum to minimum, the swing arm 9 slides from 0 to 15 degrees.

[0043] In a specific embodiment, the sliding assembly 8 also includes an elastic member 11, which adopts an elastic structure such as a spring, a tension rope or an elastic belt. The elastic member 11 is connected to the swing arm fixing member 13 through a swing arm limit block 12. When the diameter of the elastic yarn ball on the elastic yarn roller 7 changes, once the elastic yarn roller 7 and the active roller 4 are out of coordination, the elastic yarn roller 7 has space to move. At this time, the elastic force of the elastic member drives the swing arm rod 9 and the elastic yarn roller 7 to move together, so that the elastic yarn roller 7 and the active roller 4 are coordinated. For example, the elastic member 11 is a tension spring, one end of the elastic member 11 is fixedly connected to the swing arm limit block 12, and the other end of the elastic member 11 is fixedly connected to the swing arm rod 9. When the diameter of the elastic yarn ball on the elastic yarn roller 7 changes from large to small, as the diameter of the elastic yarn ball changes, the elastic yarn roller 7 has space to move, allowing the tension spring to move with the swing arm rod 9 and the elastic yarn roller 7 through tension, so that the elastic yarn on the elastic yarn roller 7 always fits the active roller 4, ensuring that the active roller 4 and the elastic yarn roller 7 form a yarn rolling structure, and the active roller 4 applies pressure to the elastic yarn, thereby completing active unwinding and feeding at a speed adapted to the outer wrapped yarn. Furthermore, the swing arm limit block 12 is hinged to the swing arm fixing part 13, a U-shaped groove is provided in the swing arm limit block 12, and a pin rod 18 sliding along the U-shaped groove is provided in the swing arm rod 9. When the elastic part 11 pulls the swing arm rod 9, it will also pull the swing arm limit block 12 to rotate. When the swing arm rod 9 moves close to the swing arm limit block 12, the U-shaped groove is opposite to the pin rod 18 on the swing arm rod 9, which facilitates the pin rod 18 to enter the U-shaped groove for easy limiting.

[0044] In one embodiment, a locking assembly 10 is further included. The locking assembly 10 can have any structure and is used to fix the sliding assembly 8. For example, the locking assembly 10 can use a spring latch structure, a magnet, a snap, a spring lock structure, or a spring hook structure. The locking assembly 10 is detachably connected to the sliding assembly 8, and the swing arm 9 is movably fixed by the locking assembly 10. Furthermore, the locking assembly 10 includes a hook member 14, which is used to fix the swing arm 9 when it slides upward. The feeding frame 6 is provided with a hook fixing member 15, and the hook member 14 is movably displaced along the hook fixing member 15. The outer wall of the feeding frame 6 is provided with a hook handle 5 for controlling the movement of the hook member 14. The end of the hook member 14 is movably connected to the swing arm rod 9, and a reset member 16 is provided in the hook connecting plate 15. The reset member 16 is sleeved with the hook member 14. The reset member 16 adopts a spring, tension spring or piston structure, so that the hook member is connected to the hook fixing member through the reset member. Both ends of the reset member 16 are provided with a pressure plate 17 that is screwed and fixed to the hook fixing member 15.

[0045] In one embodiment, the yarn guide assembly 21 includes a yarn feed bracket 22 and a tensioning roller 30. A yarn guide 23 is provided on the yarn feed bracket 22. A vortex pre-spinning roller 28 is provided between the tensioning roller 30 and the yarn guide 23. A stop rod 29 is provided between the vortex pre-spinning roller 28 and the tensioning roller 30. A yarn detector 24, fixedly connected to the lower end surface of the yarn feed bracket 22, is provided between the vortex pre-spinning roller 28 and the yarn guide 23. An air valve 26, fixedly connected to the yarn feed bracket 22, is provided between the vortex pre-spinning roller 28 and the yarn detector 24. A pneumatic manual button 25 is provided on the lower end surface of the yarn feed bracket 22 and is in electrical communication with the air valve 26. A yarn guide horn 27 is provided between the air valve 26 and the vortex pre-spinning roller 28. When a yarn break occurs, the pneumatic manual button 25 is used to shut off the air valve, and the servo motor 3 also stops operating. Next, the swing arm 9 is pushed upward to disengage the yarn spool on the elastic yarn roller 7 from the active roller 4. The swing arm 9 is then locked and secured with the hook member 14. After the broken yarn is removed, the elastic yarn on the yarn spool is pulled out of the elastic yarn roller 7 and sequentially passes through the yarn guide 23, yarn detector 24, air valve 26, yarn guide horn block 27, vortex spinning roller 28, and tensioning roller 30 on the yarn feed support 22. Pulling the hook handle 5 drives the hook member 14 away from the swing arm 9, sliding the elastic yarn roller 7 into engagement with the active roller 4 to achieve the yarn rolling mechanism. The active roller 4 and air valve 26 are then activated, and the elastic yarn is fed into the vortex spinning machine to continue the core-spun yarn spinning process.

[0046] A method for controlling a yarn feeding device of a vortex spinning machine comprises the following steps:

[0047] The first step is to push the elastic yarn roller 7 on the swing arm 9 to slide upward, so that the elastic yarn roller 7 is separated from the active roller 4, and then the swing arm 9 is clamped and fixed with the locking assembly 10.

[0048] Step 2: Place the elastic yarn roll onto the elastic yarn roller 7, pull out the spandex yarn on the elastic yarn roller 7 and pass it through the yarn guide assembly 21, thus completing the preparation process of feeding the elastic yarn of the elastic yarn roll into the vortex spinning machine.

[0049] Step 3: By pulling the locking assembly 10 to disengage the swing arm 9, the elastic yarn roller 7 slides downward under the action of its own gravity so that the elastic yarn roll is pressed against the active roller 4.

[0050] Step 4: Start the servo motor 3 to feed the elastic yarn of the elastic yarn roll into the vortex spinning machine. The feeding speed of the elastic yarn is 100 m / min to 160 m / min, and the feeding speed of the outer yarn is 350 m / min to 400 m / min. The feeding speed of the outer yarn is 2.5 to 3.5 times the feeding speed of the elastic yarn.

[0051] In summary, the spandex feeding mechanism and control method for a vortex spinning machine feature a compact structure, excellent operational stability, and convenient operation. This mechanism addresses the inability of existing vortex spinning machines to spin spandex core-spun yarn. Furthermore, it addresses the difficulty in yarn reeling caused by spandex rebound when the spandex yarn breaks. By matching the spandex yarn feed speed with the yarn feed speed, spandex and cotton yarn can be paralleled.

[0052] Furthermore, it should be noted that the specific embodiments described in this specification may vary in the shapes and names of their components. Any equivalent or simple variations based on the structure, features, and principles described in the patented concept of this invention are included within the scope of protection of this patent. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments, and these modifications, as long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, shall fall within the scope of protection of this invention.

Claims

1. A yarn feeding device for a vortex spinning machine, characterized in that: The invention comprises a loading mechanism (1) and a feeding mechanism (2), wherein the loading mechanism (1) is used to install elastic yarn, and the feeding mechanism (2) comprises a driving component and a feeding component, wherein the feeding component cooperates with the loading mechanism (1) to elasticize the elastic yarn along the tangential direction of the loading mechanism (1), and the driving component is used to drive the feeding component to move so that the elastic yarn is fed under the action of friction force, and the feeding speed of the elastic yarn is adapted to the feeding speed of the outer yarn.

2. The yarn feeding device for a vortex spinning machine according to claim 1, characterized in that: The feeding mechanism (1) comprises an elastic yarn roller (7) and a sliding assembly (8), wherein the sliding assembly (8) is connected to the elastic yarn roller (7), and the elastic yarn roller (7) moves via the sliding assembly (8) and is used to cooperate with the feeding assembly when the elastic yarn is fed.

3. The yarn feeding device for a vortex spinning machine according to claim 2, characterized in that: The sliding assembly (8) comprises a swing arm rod (9), a swing arm fixing member (13) and an elastic member (11); the elastic yarn roller (7) is connected to the swing arm rod (9); the swing arm rod (9) is movably connected to the swing arm fixing member (13); the elastic member (11) is respectively connected to the swing arm rod (9) and the swing arm fixing member (13); the elastic member (11) is used to apply an elastic force to the swing arm rod (9); the swing arm rod (9) moves with the elastic yarn roller (7) under the action of the elastic force, so that the elastic yarn roller (7) cooperates with the feeding assembly.

4. The yarn feeding device for a vortex spinning machine according to claim 3, characterized in that: The sliding assembly (8) further comprises a swing arm limiting block (12), wherein the swing arm limiting block (12) is movably connected to the swing arm fixing member (13), and the swing arm rod (9) is detachably matched with the swing arm limiting block to achieve limiting of the swing arm rod (9).

5. The yarn feeding device for a vortex spinning machine according to claim 4, characterized in that: The swing arm limit block (12) is movably connected to the swing arm fixing piece (13); the elastic piece (11) is connected to the swing arm fixing piece (13) via the swing arm limit block (12); and the swing arm rod (9) is detachably matched with the swing arm limit block under the action of elastic force.

6. The yarn feeding device for a vortex spinning machine according to claim 2, characterized in that: It also comprises a locking assembly (10), wherein the locking assembly (10) is detachably connected to the sliding assembly (8), and the locking assembly (10) is used to fix the sliding assembly (8).

7. The yarn feeding device for a vortex spinning machine according to claim 6, characterized in that: The locking assembly (10) comprises a hook member (14), a reset member (16) and a hook fixing member (15); the reset member (16) is arranged between the hook member (14) and the hook fixing member (15); the hook member (14) is movably connected to the hook fixing member (15) via the reset member (16); and the hook member (14) is used to fix the sliding assembly (8).

8. The yarn feeding device for a vortex spinning machine according to any one of claims 1 to 7, characterized in that: It also comprises a feeding rack (6), the loading mechanism (1) and the feeding mechanism (2) being mounted on the feeding rack (6), and the feeding rack (6) being provided with more than two feeding mechanisms (2), the feeding mechanisms (2) being distributed in a staggered manner.

9. The yarn feeding device for a vortex spinning machine according to claim 8, characterized in that: It also includes a yarn guide assembly (21), wherein the yarn guide assembly (21) and the feeding frame (6) are arranged in a one-to-one correspondence or in a gap-staggered arrangement.

10. A control method for a yarn feeding device for a vortex spinning machine, used for operating the yarn feeding device for a vortex spinning machine according to any one of claims 1 to 9, characterized in that The steps include: The first step is to push the elastic yarn roller (7) on the swing arm (9) to slide upwards, so that the elastic yarn roller (7) is separated from the active roller (4), and then the swing arm (9) is clamped and fixed with the locking assembly (10); The second step is to place the elastic yarn on the elastic yarn roller (7), pull out the elastic yarn on the elastic yarn roller (7) and pass it through the yarn guide assembly (21), thereby completing the preparation process of feeding the elastic yarn of the elastic yarn roll into the vortex spinning machine; In the third step, the locking assembly (10) is pulled away from the swing arm (9), and the elastic yarn roller (7) slides downward under the action of its own gravity so that the elastic yarn roll is pressed against the active roller (4); The fourth step is to start the servo motor (3) to feed the elastic yarn into the vortex spinning machine, and the feeding speed of the outer yarn is 2.5 to 3.5 times the feeding speed of the elastic yarn.

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