Yarn feeding device for a vortex spinning machine and control method thereof

Abstract

The application relates to a yarn feeding device for a vortex spinning machine and a control method thereof in the technical field of the spinning machine, which comprises a feeding mechanism and a feeding mechanism, the feeding mechanism is used for mounting elastic yarn, the feeding mechanism comprises a driving assembly and a feeding assembly, the feeding assembly is matched with the feeding mechanism and is used for performing elasticization on the elastic yarn along the tangent direction of the feeding mechanism, the driving assembly is used for driving the feeding assembly to move so that the elastic yarn is fed under the action of friction, and the feeding speed of the elastic yarn is adapted to the feeding speed of the cover yarn. The vortex spinning machine has the characteristics of compact structure, good running stability and convenient operation. The problem that the existing vortex spinning machine cannot spin spandex core-spun yarn is solved. Meanwhile, when the spandex yarn is disconnected, the problem that the yarn feeding is difficult due to the rebound of the spandex yarn is solved. Through the matching of the feeding speed of the spandex filament and the feeding speed of the yarn, the spandex and the cotton yarn are combined.

Description

TECHNICAL FIELD

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

[0002] Vortex spinning is a new type of spinning method that uses a fixed vortex spinning tube to replace a high-speed rotating spinning cup and spinning spindle, steel ring for spinning. The current vortex spinning process is as follows: the fiber strip is fed into the drafting system of the vortex spinning machine by the feed roller, and the fiber sliver output by the drafting is fed into the vortex tube at high speed by the action of airflow from the cotton conveying pipe. A vortex-shaped airflow is generated in the vortex tube, and when the upward rotating airflow reaches the core tube, it converges with the fiber entering from the cotton conveying pipe to form a condensed fiber ring along the inner wall of the vortex tube, which stably revolves around the axis of the vortex tube at high speed, twisting the fiber into yarn, which is continuously drawn out from the guide hole by the drawing 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 types of fibers. It is generally made of strong and elastic fibers as core yarn, and twisted with cotton, wool, viscose, etc. to produce a yarn. The core-spun yarn is spun by arranging polyester filaments (or other filaments) on the roving frame of a conventional spinning machine, and arranging cotton roving (or short fiber roving) below. The cotton roving is fed through the horn of the traversing device, then through the drafting device. The polyester filaments are drawn out without passing through the drafting device, and are directly introduced into the collector behind the front roller skin, where they are combined with the drafted pure cotton sliver, and then twisted to produce core-spun yarn.

[0004] In the production of core-spun yarn with existing vortex spinning device, the core yarn will be quickly stretched to the maximum elastic elongation interval under the traction of air flow or tension roller after entering the vortex spinning tube, and breakage will easily occur due to the difference in resilience between the core yarn and the outer covering yarn, the spinning efficiency is very low, and qualified core-spun yarn cannot be processed. Moreover, once the core yarn is broken, the yarn end will immediately wind on the yarn ball due to the greater resilience, making it difficult to find the yarn end and unable to quickly wind on, greatly reducing the production efficiency. For example, the utility model patent with application number 201921328969.6 and application date August 15, 2019, which comprises a vortex spinning machine table and a core yarn guide device arranged on the upper part of the vortex spinning machine table; the vortex spinning machine table comprises a front roller, a front roller cover cooperating with the front roller, and a spinning spindle; along the processing direction of the core yarn raw material, the core yarn guide device comprises a core yarn guide frame, a core yarn tension disc, a core yarn guide hook, a core yarn tension control member, and a core yarn air flow guide member in sequence; the core yarn guide device is used to guide the core yarn to enter the front roller and the front roller cover cooperating with the front roller, and to enter the spinning spindle together with the yarn of the vortex spinning machine table. As mentioned above, the core yarn tension control member of the utility model patent will pull the core yarn on the bobbin, which will easily cause the core yarn to break; at the same time, the core yarn of the utility model patent is passively unwound, and once the core yarn breaks, it is easy to cause the yarn to mix and stop working, resulting in low production efficiency. SUMMARY

[0005] The present application mainly solves the problems existing in the prior art, and provides a yarn feeding device for a vortex spinning machine and a control method thereof, which solves the problem that the existing vortex spinning machine cannot spin core-spun yarn with elastic core yarn.

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

[0007] A yarn feeding device for a vortex spinning machine, comprising a feeding mechanism and a feeding mechanism, the feeding mechanism is used for installing elastic yarn, the feeding mechanism comprises a driving assembly and a feeding assembly, the feeding assembly cooperates with the feeding mechanism to tension the elastic yarn along the tangential direction of the feeding mechanism, the driving assembly drives the feeding assembly to move to feed the elastic yarn under the action of friction, and the feeding speed of the elastic yarn is adapted to the feeding speed of the outer covering yarn. By tensioning the elastic yarn along the tangential direction of the feeding mechanism through the cooperation of the feeding assembly and the feeding mechanism, the feeding assembly always applies friction to the elastic yarn, and when the elastic yarn is broken, the elastic yarn always feeds along the tangential direction under the action of friction, without tangential rebound and winding, solving the problem of difficult winding. By adapting the feeding speed of the elastic yarn to the feeding speed of the outer covering yarn, the problem that the existing vortex spinning machine cannot spin core-spun yarn is solved.

[0008] Preferably, the feeding mechanism comprises an elastic yarn roller and a sliding assembly, the sliding assembly is connected to the elastic yarn roller, the elastic yarn roller moves through the sliding assembly to cooperate with the feeding assembly during the feeding of the elastic yarn. As the elastic yarn continues to feed, the diameter of the elastic yarn package on the elastic yarn roller gradually decreases, and the sliding assembly moves the elastic yarn roller to always cooperate with the feeding assembly.

[0009] Preferably, the sliding assembly comprises a swing arm rod, a swing arm fixing member and an elastic member, the elastic yarn roller is connected to the swing arm rod, the swing arm rod is movably connected to the swing arm fixing member, and the elastic member is connected to the swing arm rod and the swing arm fixing member respectively, the elastic member is used to apply an elastic force to the swing arm rod, and the swing arm rod moves with the elastic yarn roller under the action of the elastic force to cooperate with the feeding assembly. When the diameter of the elastic yarn package changes, the feeding assembly will be temporarily separated from the elastic yarn, and the elastic yarn roller will have a space to move. The elastic member applies force to the elastic yarn roller through its own deformation and the elastic force, 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 limiting block movably connected to the swing arm fixing member, and the swing arm rod is detachably matched with the swing arm limiting block to limit the swing arm rod. The swing arm limiting block can limit the swing arm rod, so that the rotation angle of the swing arm rod meets the diameter change of the elastic yarn package.

[0011] Preferably, the swing arm limiting block is movably connected to the swing arm fixing member, the elastic member connects the swing arm fixing member through the swing arm limiting block, and the swing arm rod is detachably matched with the swing arm limiting block under the action of the elastic force.

[0012] Preferably, it further comprises a locking assembly, the locking assembly is detachably connected to the sliding assembly, and the locking assembly is used to fix the sliding assembly. After the core yarn is broken, the elastic yarn roller needs to be separated from the feeding assembly through the sliding assembly to complete the winding. The locking assembly fixes the sliding assembly to avoid manual fixing of the sliding assembly and reduce labor intensity.

[0013] Preferably, the locking assembly comprises 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 frame, the feeding mechanism and the feeding mechanism are installed on the feeding frame, two or more feeding mechanisms are arranged on the feeding frame, and the feeding mechanisms are distributed in a staggered manner.

[0015] Preferably, it further comprises a yarn guide assembly, the yarn guide assembly is distributed one by one or gap staggered with the feeding frame.

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

[0017] First step: push the elastic yarn roller on the swing arm rod to slide upwards, so that the elastic yarn roller is separated from the driving roller, and then the swing arm rod is clamped and fixed with the locking assembly.

[0018] Second step: place the elastic yarn on the elastic yarn roller, pull the elastic yarn on the elastic yarn roller through the yarn guide assembly, and realize the preparation process of feeding the elastic yarn roll of the elastic yarn into the vortex spinning machine.

[0019] Third step: pull the locking assembly away from the swing arm rod, and the elastic yarn roller slides downward under the action of its own gravity to press the elastic yarn roll against the driving roller.

[0020] Fourth step: start the servo motor 3 to realize the feeding of the elastic yarn into the vortex spinning machine, and the outer cover yarn feeding speed is 2.5-3.5 times the elastic yarn feeding speed.

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

[0022] The present application provides a yarn feeding device for a vortex spinning machine and a control method thereof, which has the characteristics of compact structure, good running stability and convenient operation compared with the prior art. By adapting the feeding speed of the elastic yarn to the feeding speed of the outer cover yarn, the problem that the existing vortex spinning machine cannot spin core-spun yarn is solved. By cooperating the feeding assembly with the feeding mechanism to tension the elastic yarn along the tangential direction of the feeding mechanism, the feeding assembly always applies friction to the elastic yarn, and when the elastic yarn is disconnected, the elastic yarn always feeds along the tangential direction under the action of the friction, and will not be tangled due to the tangential rebound, solving the problem of difficult winding. The device is suitable for spinning spandex yarn (i.e. 100% wt), and is also suitable for full-automatic vortex spinning. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0024] Figure 1 is a front view structural schematic diagram of the present application.

[0025] Figure 2 is a side view structural schematic diagram of the present application.

[0026] Figure 3is a structural sectional view of the present application.

[0027] Figure 4 is a schematic diagram of the installation structure of the feeding mechanism and the feeding mechanism of the present application.

[0028] Figure 5 is a schematic diagram of the yarn feeding structure of the feeding mechanism and the feeding mechanism of the present application.

[0029] Figure 6 is a schematic diagram of the structure of the spandex feeding mechanism on the spinning rack of the present application.

[0030] Figure 7 is a schematic diagram of the structure of the yarn guide assembly of the present application.

[0031] Label explanation: feeding mechanism-1, feeding mechanism-2, servo motor-3, driving roller-4, hook handle-5,

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

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

[0034] pressing plate-17, pin rod-18, arc-shaped groove-19, spinning rack-20, yarn guide assembly-21, yarn supply support-22,

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

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

[0037] The technical solutions of the present application will be further specifically described below by examples in combination with the drawings.

[0038] Vortex spinning is also called air jet vortex spinning. The principle of vortex spinning machine is that the cotton sliver after drawing is supplied to the drafting device, the fiber bundle after drafting by the front roller drafting device is output from the front roller nip, and is guided into the spinning nozzle along the spiral fiber guide channel under the action of the axial air flow at the inlet of the spinning nozzle. The outlet of the spiral fiber guide channel is provided with a needle-shaped twist resisting piece, the fiber bundle is bent at the needle part, so that the fiber bundle is introduced into the vortex chamber without twist. The front end of the fiber bundle is pulled into the yarn channel in the spindle under the drag of the formed yarn, and is twisted into the newly formed yarn to become the core of the yarn. The tail end of the fiber still remains in the fiber guide channel under the holding of the front roller nip. When the tail end of the fiber is no longer held by the front roller nip, it is no longer maintained in the fiber guide channel under the centrifugal action of the air vortex in the spinning nozzle, but is dispersed radially at the inlet of the spindle by the rotating air flow, and is laid on the front end cone of the spindle under the driving of the air vortex, and is wound around the subsequent yarn. The formed yarn is composed of the core of the yarn composed of approximately parallel untwisted fibers and the outer peripheral spiral wrapped fibers. In the embodiment, the outer wrapping yarn feeding part of the vortex spinning machine can adopt the structure of the existing device, for example, the vortex spinning machine of the VORTEX brand.

[0039] Embodiment: a yarn feeding device for vortex spinning machine, comprising a feeding mechanism 1 and a feeding mechanism 2, the feeding mechanism 1 and the feeding mechanism 2 can be installed on the vortex spinning machine, or a stand-alone column can be installed and fixed, the installation mode commonly uses conventional mechanical installation structure, including detachable and non-detachable fixing structure, such as fixed by bolt, fixed by bearing, fixed by welding, fixed by riveting, etc. The relative position of the feeding mechanism 1 and the feeding mechanism 2 is arbitrary, which can be up and down or left and right or left up and right down or left down and right up, etc. The feeding mechanism 1 is used for installing elastic yarn, and the feeding mechanism 1 comprises a rotary body structure capable of installing a yarn ball, such as a circular roller, a trapezoidal roller, a special-shaped roller, etc. The feeding mechanism 2 comprises a driving assembly and a feeding assembly, the driving assembly adopts a structure capable of driving the feeding assembly to move, which can adopt mechanical driving and manual driving mode, the power source of mechanical driving can adopt servo motor, air cylinder, linear module, etc. The feeding assembly adopts a structure capable of milling yarn cooperating with the feeding mechanism, and the feeding assembly is directly or indirectly connected with the driving assembly, and the transmission structure commonly used in mechanical field is adopted between the two, such as shaft connection or belt connection or chain connection, etc. The feeding assembly cooperates with the feeding mechanism 1 to apply elastic force to the elastic yarn along the tangential direction of the feeding mechanism 1, the driving assembly is used to drive the feeding assembly to move to feed the elastic yarn under the action of friction force, and the feeding speed of the elastic yarn is adapted to the feeding speed of the cover yarn. In a specific embodiment, the feeding mechanism 1 is above the 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 circular roller, the driving assembly adopts a servo motor 3, the feeding assembly adopts a circular driving roller 4, the servo motor 3 is connected with the driving roller 4 through a driving shaft, the parameters of the servo motor 3 are adjusted through an electric control system, so that the servo motor 3 drives the driving roller 4 to work at a certain speed, the elastic yarn is located between the driving roller 4 and the feeding mechanism 1, the elastic yarn is fed under the action of friction force, the feeding speed is controlled by the driving roller 4 and is adapted to the feeding speed of the cover yarn, preferably, the feeding speed of the cover yarn is 2.5-3.5 times of the feeding speed of the elastic yarn. For example, the feeding speed of the elastic yarn is 100-160 m / min, and the feeding speed of the cover yarn is 350-400 m / min. Since the elasticity of the cover yarn is smaller than that of the elastic yarn, the elastic yarn will not be stretched to the maximum elastic elongation range when the cover yarn is stretched at this speed, which can ensure the elasticity of the core-spun yarn and reduce the probability of broken yarn, thereby improving the quality of the core-spun yarn.

[0040] In one embodiment, the feeding frame 6 is further included, the driving assembly is a servo motor 3, the feeding assembly is a driving roller 4, the servo motor 3 is connected to the driving roller 4 through a driving shaft, the servo motor 3 and the driving roller 4 are provided with the feeding frame 6, and the servo motor 3, the driving roller 4 and the feeding mechanism 1 are installed on the feeding frame 6. Preferably, the feeding mechanism 1 includes an elastic yarn roller 7 and a sliding assembly 8, the sliding assembly 8 is installed on the feeding frame 6, the elastic yarn roller 7 is connected to the sliding assembly 8 through a shaft, the driving roller 4 and the elastic yarn roller 7 in the same feeding frame 6 are distributed in a staggered manner, and the driving roller 4 is driven by the servo motor 3. The feeding frame 6 is installed on the spinning frame 20 in a spaced distribution, and the spinning frame 20 is provided with a yarn guide assembly 21 corresponding to the feeding frame 6 or distributed in a staggered gap.

[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 install an elastic yarn package, and the sliding assembly 8 is any structure capable of moving 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 chain wheel structure. The sliding assembly 8 is directly or indirectly connected to the elastic yarn roller 7, and the sliding assembly 8 is used to realize the sliding displacement of the elastic yarn roller 7 along with the change of the radius when feeding the yarn package, so as to maintain the beaming structure with the feeding mechanism 2 to realize the feeding of the elastic yarn.

[0042] In one specific embodiment, the sliding assembly 8 comprises a swing arm rod 9, a swing arm fixing piece 13 and a swing arm limiting block 12. The swing arm rod 9 can adopt any shape of swing arm structure, such as an arc-shaped rod, a straight rod, a round rod, an S-shaped rod, etc. The swing arm fixing piece 13 is of any structure, and its shape is arbitrary, such as a square block, a circular table, a conical table, etc. The swing arm rod 9 is movably connected to the swing arm rod 9, such as being hinged, connected through a bearing, connected through a sliding block, connected through a chain, etc. The relative position of the swing arm fixing piece 13 and the swing arm rod 9 is arbitrary, which can be up and down or left and right or left up and right down or left down and right up, etc. The shape of the swing arm limiting block 12 is arbitrary, such as a square block, a circular table, a conical table, a U-shaped block, etc. The swing arm rod 9 is detachably matched with the swing arm limiting block 12 to realize the limiting of the swing arm rod 9; for example, the swing arm limiting block 12 is provided with a U-shaped groove, the swing arm rod 9 is provided with a pin rod 18 sliding along the U-shaped groove, and the pin rod 18 is limited by abutting against the bottom of the U-shaped groove; for another example, the swing arm limiting block 12 is provided with a magnet, and the swing arm rod 9 is automatically attracted and limited after being close to the swing arm limiting block 12; for another example, the swing arm rod 9 is provided with a pin hole, and the swing arm limiting block 12 is provided with a spring pin, and the spring pin enters the pin hole to realize the limiting. Further, the elastic yarn roller 7 is arranged at the end of the swing arm rod 9, the inner wall of the feeding frame 6 is provided with the swing arm fixing piece 13, the swing arm rod 9 is hinged to the swing arm fixing piece 13, an arc-shaped groove 19 is arranged in the feeding frame 6, the swing arm rod 9 slides along the arc-shaped groove 19, the sliding angle of the swing arm rod 9 is related to the radius of the elastic yarn group, the swing arm fixing piece 13 is provided with the swing arm limiting block 12 rotationally connected with the swing arm fixing piece 13, the swing arm limiting block 12 is provided with a U-shaped groove, the swing arm rod 9 is provided with the pin rod 18 sliding along the U-shaped groove, and the pin rod 18 is limited by abutting against the bottom of the U-shaped groove. Preferably, the sliding angle of the swing arm rod 9 is 0 to 15 degrees, and when the radius of the elastic yarn group changes from the maximum to the minimum, the swing arm rod 9 slides from 0 degrees to 15 degrees.

[0043] In one embodiment, the sliding assembly 8 further comprises a resilient member 11, which is a structure with elasticity such as a spring, a tensioning rope or an elastic band, etc. The resilient member 11 is connected to the swing arm fixing member 13 through the swing arm limiting block 12. When the diameter of the elastic yarn ball on the elastic yarn roller 7 changes, the elastic yarn roller 7 is out of engagement with the driving roller 4, and the elastic yarn roller 7 has a space for movement. At this time, the elastic force of the resilient member drives the swing arm rod 9 and the elastic yarn roller 7 to move together, so that the elastic yarn roller 7 is engaged with the driving roller 4. For example, the resilient member 11 is a tension spring, one end of the resilient member 11 is fixedly connected to the swing arm limiting block 12, and the other end of the resilient 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 decreases, the elastic yarn roller 7 has a space for movement with the change of the diameter of the elastic yarn ball, and the tension spring drives the swing arm rod 9 and the elastic yarn roller 7 to move together through the tensioning force, so that the elastic yarn on the elastic yarn roller 7 always adheres to the driving roller 4, ensuring that the driving roller 4 and the elastic yarn roller 7 form a yarn rolling structure, the elastic yarn is pressed by the driving roller 4, and then the driving unwinding and feeding at a speed compatible with the outer cover yarn are completed. Further, the swing arm limiting block 12 is hinged to the swing arm fixing member 13, the swing arm limiting block 12 is provided with a U-shaped groove, the swing arm rod 9 is provided with a pin 18 which slides along the U-shaped groove, and the resilient member 11 also rotates the swing arm limiting block 12 when pulling the swing arm rod 9. When the swing arm rod 9 moves close to the swing arm limiting block 12, the U-shaped groove is opposite to the pin 18 on the swing arm rod 9, so that the pin 18 enters the U-shaped groove and is conveniently limited.

[0044] In one embodiment, a locking assembly 10 is further included, which has an arbitrary structure and is used to fix the sliding assembly 8. For example, the locking assembly 10 adopts a spring pin structure or a magnet or a buckle or a spring lock structure or a spring hook structure, etc. The locking assembly 10 is detachably connected to the sliding assembly 8, and the swing arm rod 9 is movably fixed through the locking assembly 10. Further, the locking assembly 10 comprises a hook member 14, which is used to fix the swing arm rod 9 when the swing arm rod 9 slides upward. The feeding frame 6 is provided with a hook fixing member 15, the hook member 14 movably displaces along the hook fixing member 15, and the outer wall of the feeding frame 6 is provided with a hook handle 5 for controlling the pulling displacement of the hook member 14. The end of the hook member 14 movably connects to the swing arm rod 9, the hook connecting plate 15 is provided with a reset member 16, the reset member 16 is sleeved with the hook member 14, the reset member 16 adopts a spring, a tension spring or a piston structure, so that the hook member movably connects to the hook fixing member through the reset member, and the reset member 16 is provided with a pressing plate 17 which is fixedly screwed to the hook fixing member 15 at both ends.

[0045] In one embodiment, the yarn feeding assembly 21 further comprises a yarn guide 23 provided on the yarn supply bracket 22, a vortex pre-spinning roller 28 provided between the yarn guide 23 and the tension roller 30, a stop rod 29 provided between the vortex pre-spinning roller 28 and the tension roller 30, a yarn detector 24 provided between the vortex pre-spinning roller 28 and the yarn guide 23 and fixed to the lower end surface of the yarn supply bracket 22, an air valve 26 provided between the vortex pre-spinning roller 28 and the yarn detector 24 and fixed to the yarn supply bracket 22, a pneumatic manual button 25 provided on the lower end surface of the yarn supply bracket 22 and electrically connected to the air valve 26, and a yarn guide horn 27 provided between the air valve 26 and the vortex pre-spinning roller 28. When a yarn breakage occurs, the pneumatic manual button 25 is used to close the air valve, and the servo motor 3 also stops running. Then the elastic yarn roller 7 is pushed upward to slide on the swing arm rod 9, so that the yarn ball on the elastic yarn roller 7 is separated from the driving roller 4, and then the swing arm rod 9 is clamped and fixed with the hook member 14. After the broken yarn is removed, the elastic yarn on the yarn ball is pulled out of the elastic yarn roller 7, and then passes through the yarn guide 23, the yarn detector 24, the air valve 26, the yarn guide horn 27, the vortex pre-spinning roller 28 and the tension roller 30 on the yarn supply bracket 22 in sequence. By pulling the hook handle 5 to drive the hook member 14 to separate from the swing arm rod 9, the elastic yarn roller 7 is slid to cooperate with the driving roller 4 to realize the rolling structure. The driving roller 4 and the air valve 26 are started, and the elastic yarn is continuously fed into the vortex spinning machine to carry out the core-spun yarn spinning process.

[0046] A control method for a yarn feeding device of a vortex spinning machine, comprising the following operation steps:

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

[0048] Second step: place the elastic yarn roll on the elastic yarn roller 7, and pull out the spandex yarn on the elastic yarn roller 7 to pass through the yarn guide assembly 21 to realize the preparation process of feeding the elastic yarn of the elastic yarn roll into the vortex spinning machine.

[0049] Third step: by pulling the locking assembly 10 to separate from the swing arm rod 9, the elastic yarn roller 7 slides downward under the action of its own gravity to press the elastic yarn roll and the driving roller 4.

[0050] Fourth step: start the servo motor 3 to realize the feeding of the elastic yarn of the elastic yarn roll into the vortex spinning machine, the feeding speed of the elastic yarn is 100-160 m / min, and the feeding speed of the outer cover yarn is 350-400 m / min; the outer cover yarn feeding speed is 2.5-3.5 times the elastic yarn feeding speed.

[0051] In summary, the spandex feeding mechanism for vortex spinning machine and the control method thereof have the characteristics of compact structure, good running stability and convenient operation. The problem that the existing vortex spinning machine cannot spin spandex core yarn is solved. At the same time, when the spandex yarn is broken, the problem of difficult yarn feeding caused by spandex yarn rebound is solved. Through the matching of the feeding speed of spandex yarn and the feeding speed of yarn, the spandex and cotton yarn are realized.

[0052] In addition, it should be noted that the specific embodiments described in the specification, the shape of the zero, the components, the name taken, etc. can be different. Any equivalent or simple change made according to the structure, features and principles described in the patent concept of the present application is included in the protection scope of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace, as long as it does not deviate from the structure of the present application or exceed the scope defined by the present claims, which shall belong to the protection scope of the present application.

Claims

1. A control method for a yarn feed of a vortex spinning machine, characterized in that: The yarn feeding device for the vortex spinning machine comprises a feeding mechanism (1) for mounting the elastic yarn and a feeding mechanism (2) comprising a driving assembly and a feeding assembly, the feeding assembly is used for the elastic yarn to be twisted along the tangential direction of the feeding mechanism (1) in cooperation with the feeding mechanism (1), the driving assembly is used for driving the feeding assembly to move so that the elastic yarn is fed under the friction force and the feeding speed of the elastic yarn is adapted to the feeding speed of the cover yarn; The feeding mechanism (1) comprises an elastic yarn roller (7) and a sliding assembly (8), the sliding assembly (8) is connected to the elastic yarn roller (7), the elastic yarn roller (7) moves through the sliding assembly (8) and is used for cooperating with the feeding assembly during the feeding of the elastic yarn; The sliding assembly (8) comprises a swing arm rod (9), a swing arm fixing part (13) and an elastic element (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 part (13), the elastic element (11) is connected to the swing arm rod (9) and the swing arm fixing part (13) respectively, the elastic element (11) is used for applying the elastic force to the swing arm rod (9), the swing arm rod (9) moves with the elastic yarn roller (7) under the elastic force so that the elastic yarn roller (7) cooperates with the feeding assembly; The sliding assembly (8) further comprises a swing arm limiting block (12), the swing arm limiting block (12) is movably connected to the swing arm fixing part (13), the swing arm rod (9) is detachably matched with the swing arm limiting block to limit the swing arm rod (9); the swing arm limiting block (12) is movably connected to the swing arm fixing part (13), the elastic element (11) is connected to the swing arm fixing part (13) through the swing arm limiting block (12), the swing arm rod (9) is detachably matched with the swing arm limiting block under the elastic force; Further comprising a locking assembly (10), the locking assembly (10) is detachably connected to the sliding assembly (8), the locking assembly (10) is used for fixing the sliding assembly (8); Further comprising a feeding frame (6), the feeding mechanism (1) and the feeding mechanism (2) are mounted on the feeding frame (6), the feeding frame (6) is provided with two or more feeding mechanisms (2), the feeding mechanisms (2) are distributed in a staggered manner; the elastic yarn roller (7) is arranged at the end of the swing arm rod (9), the inner wall of the feeding frame (6) is provided with the swing arm fixing part (13), the swing arm rod (9) is hinged to the swing arm fixing part (13), an arc-shaped groove (19) is arranged in the feeding frame (6), the swing arm rod (9) slides along the arc-shaped groove (19), the sliding angle of the swing arm rod (9) is related to the radius of the elastic yarn group, the swing arm limiting block (12) is rotatably connected to the swing arm fixing part (13), a U-shaped groove is arranged in the swing arm limiting block (12), a pin rod (18) is arranged in the swing arm rod (9) and slides along the U-shaped groove, the pin rod (18) is limited by abutting against the bottom of the U-shaped groove; the sliding angle of the swing arm rod (9) is 0 degree to 15 degrees, when the radius of the elastic yarn group changes from the maximum to the minimum, the swing arm rod (9) slides from 0 degree to 15 degrees. Also include yarn guide assembly (21), the yarn guide assembly (21) is distributed or gap staggered distribution with feed frame (6) one to one correspondence;Yarn guide assembly (21) includes yarn supply support (22) and tension roller (30), yarn supply support (22) is provided with yarn guide (23), tension roller (30) and yarn guide (23) are provided with eddy current spinning front roller (28), eddy current spinning front roller (28) and tension roller (30) are provided with stop bar (29), eddy current spinning front roller (28) and yarn guide (23) are provided with with yarn supply support (22) lower end surface connection fixed probe (24);Eddy current spinning front roller (28) and probe (24) are provided with with yarn supply support (22) connection fixed air valve (26), yarn supply support (22) lower end surface is provided with air valve (26) circuit control communication pneumatic manual button (25), air valve (26) and eddy current spinning front roller (28) are provided with yarn guide horn block (27); The control method of the yarn feeding device comprises the following steps: First, push the elastic yarn roller (7) on the swing arm rod (9) to slide upwards, so that the elastic yarn roller (7) is separated from the driving roller (4), and then the swing arm rod (9) is clamped and fixed with the locking assembly (10); Second, place the elastic yarn on the elastic yarn roller (7), pull the elastic yarn on the elastic yarn roller (7) through the yarn guide assembly (21), and realize the preparation process of feeding the elastic yarn of the elastic yarn roll into the vortex spinning machine; Third, pull the locking assembly (10) away from the swing arm rod (9), and the elastic yarn roller (7) slides downward under the action of its own gravity to press the elastic yarn roll and the driving roller (4); Fourth, start the servo motor (3) to realize the feeding of the elastic yarn into the vortex spinning machine, and the outer cover yarn feeding speed is 2.5-3.5 times the elastic yarn feeding speed.

2. The control method of the yarn feeding device for a vortex spinning machine according to claim 1, 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) through the reset member (16), and the hook member (14) is used for fixing the sliding assembly (8).

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