Phase twist yarn and apparatus for producing the same

Abstract

The application discloses a phase spinning flower type yarn and a production device thereof and belongs to the field of textile technology. The phase spinning flower type yarn is composed of base yarn segments and wave-shaped yarn segments, the wave-shaped yarn segment has a tapered transition structure with a thick middle and a tapered end, and the key improvement lies in that the linear densities of the base yarn segments and the wave-shaped yarn segments are equal. The production device comprises a phase spinning mechanism arranged between a front drafting device and a yarn guide mechanism, the mechanism comprises a driving wheel, a driven wheel and a circular ring belt, yarn must be S-shaped around two edge strips of the circular ring belt, a second driving device drives the driving wheel to rotate, and a control unit coordinately controls various components. The application forms the change of the yarn diameter under constant speed feeding through the periodic change of the friction force, effectively solves the problems of uneven twist, low strength, more hairiness and difficult linear density control of the traditional slub yarn, and remarkably improves the yarn quality and weaving performance.

Description

Technical Field

[0001] This invention relates to the field of textile technology, and in particular to a phase-spun fancy yarn and its production apparatus. Background Technology

[0002] Currently, fancy yarns with unique appearance and three-dimensional effects, especially slub yarns and their fabrics, are highly favored by the market. These yarns, by forming randomly or regularly distributed thick sections on the base yarn, give the fabric a strong visual sense of layering and a fancy effect. Traditional slub yarn production is mainly based on modified spinning machines, using servo motors to dynamically change the speed of the front roller or the middle and rear rollers, thereby instantaneously changing the draft ratio of a single roving. This variable-speed feeding method of a single roving causes the linear density (count) of the sliver output by the front roller to fluctuate periodically, forming a structure of alternating base yarn (thin sections) and slub sections (thick sections).

[0003] However, the traditional production methods for slub yarn, which has a variable diameter, have significant inherent drawbacks:

[0004] First, the yarn twist distribution is uneven. When the yarn is twisted, the twist naturally concentrates in the finer parts (base yarn) with less resistance, while the thicker slub parts are difficult to twist, resulting in a significantly lower twist. This twist difference is particularly serious when the slub length is long or the ratio (diameter of thick slub / diameter of base yarn) is large.

[0005] Secondly, insufficient and uneven yarn strength is a major source of yarn strength. The direct consequence of concentrated twist at the finer points and insufficient twist at the thicker points is that the slub section becomes a weak link in the yarn strength. This not only leads to a decrease in the overall strength of the yarn, but also significantly increases the strength unevenness, which seriously affects subsequent processing and the quality of the finished product.

[0006] In addition, the problem of hairiness is prominent. The fiber control at the thicker sections is weak (due to insufficient twist), and the fiber ends are easily exposed, resulting in long and numerous hairs in the slub section and poor yarn surface smoothness. Furthermore, the overall yarn linear density (count) has a large deviation. The yarn count in the thicker sections becomes significantly thicker, making it difficult to accurately control the average linear density of the entire slub yarn. It often deviates from the target value, resulting in a large yarn count deviation.

[0007] The combined effect of the aforementioned inherent defects severely affects the weaving performance of such fancy yarns. In particular, the low strength, large strength unevenness, long hairiness, and swelling at thick nodes can easily cause problems such as high warp breakage rate and unclear opening during the weaving process (especially on high-speed looms), seriously hindering weaving efficiency and even making production impossible. Summary of the Invention

[0008] The purpose of this invention is to provide a phase-spun fancy yarn and its production apparatus to solve the problems existing in the prior art and improve the weaving performance of fancy yarns.

[0009] To achieve the above objectives, the present invention provides the following solution:

[0010] This invention provides a phase-spun fancy yarn, comprising a base yarn segment and a wave yarn segment, wherein all the base yarn segments and all the wave yarn segments are staggered along the length direction of the phase-spun fancy yarn; each wave yarn segment comprises a first conical segment, an intermediate segment, and a second conical segment connected in sequence, wherein the diameters of the first conical segment and the second conical segment gradually decrease from one end near the intermediate segment of the same wave yarn segment to the other end; the diameter of the intermediate segment is larger than the diameter of the base yarn segment, and the linear density of the base yarn segment is equal to the linear density of the wave yarn segment.

[0011] Preferably, the diameter of the end of the first conical segment away from the middle segment of the same wave-shaped yarn segment is equal to the diameter of the adjacent base yarn segment; the diameter of the end of the second conical segment away from the middle segment of the same wave-shaped yarn segment is equal to the diameter of the adjacent base yarn segment.

[0012] Preferably, the phase-spun fancy yarn is a pure yarn, a blended yarn, or a composite yarn.

[0013] Preferably, the yarn slivers of the phase-spun fancy yarn are made of at least one of natural fibers and synthetic fibers.

[0014] Preferably, the linear density of the base yarn segment is 10 tex to 100 tex, the length of the base yarn segment between two adjacent wavy yarn segments is 10 mm to 100 mm, the length of the wavy yarn segment is 5 mm to 15 mm, and the diameter of the middle segment is 0.1 mm to 0.4 mm.

[0015] Preferably, the phase-spun fancy yarn is manufactured using ring spinning, Siro spinning, or compact spinning.

[0016] The present invention also provides a production apparatus for the above-mentioned phase-spun fancy yarn, comprising a first driving device, a second driving device, and a phase spinning mechanism disposed between a front drafting device and a yarn guiding mechanism. The phase spinning mechanism includes a driving wheel, a driven wheel, and an annular circular belt. The annular circular belt is wound around the driving wheel and the driven wheel. The side strip of the annular circular belt near the front drafting device is a first side strip, and the side strip away from the front drafting device is a second side strip. The yarn sliver between the front drafting device and the yarn guiding mechanism is a sliver to be twisted. The first side strip and the second side strip are respectively in sliding engagement with the sliver to be twisted. The first side strip and the second side strip are parallel to each other, making the sliver to be twisted S-shaped. The first driving device is used to drive the first side strip to reciprocate periodically to change the tangential friction force applied by the first side strip to the sliver to be twisted and the tangential friction force applied by the second side strip to the sliver to be twisted. The second driving device is used to drive the driving wheel to rotate.

[0017] Preferably, it also includes a control unit, which is used to control the operation of the first drive device, the second drive device, and the drive device of the front roller in the front stretching device.

[0018] Preferably, the control unit is a programmable logic controller.

[0019] Preferably, the first driving device includes a first driving motor, a cam, a T-shaped rod, a spring, and a fixed rod. The first driving motor drives the cam to rotate. The T-shaped rod includes a first straight rod and a second straight rod whose one end is fixedly connected to the middle of the first straight rod. The side of the first straight rod away from the second straight rod abuts against the wheel surface of the cam. The fixed rod is fixedly installed and has a through hole. The second straight rod slides into the through hole. The spring is sleeved on the second straight rod, with one end abutting against the first straight rod and the other end abutting against the fixed rod. The first edge strip is fixedly connected and snapped into the first straight rod.

[0020] The present invention achieves the following technical effects compared to the prior art:

[0021] The phase-spun fancy yarn and its production apparatus of the present invention apply periodically varying friction control to the sliver to be twisted by the first and second side strips of the annular belt in the phase spinning mechanism. Without affecting the yarn twist, the wave segment and the base yarn segment are formed. The twist of the formed wave segment (thick section) and the base yarn segment (thin section) is evenly distributed, avoiding the problem of twist concentration in the thin section and insufficient twist in the thick section caused by instantaneous speed change feeding of traditional slub yarn, thereby improving the overall structural stability of the yarn.

[0022] Furthermore, by precisely coordinating the speed of the front roller with the movement of the phase spinning mechanism through the control unit, the length, thickness, and distribution pattern of the wave yarn segment can be accurately controlled. More importantly, since the linear density of the base yarn segment is designed to be equal to that of the wave yarn segment, it means that the amount of fiber per unit length is the same. This makes it easier to control and stabilize the average linear density of the entire yarn, significantly reducing yarn count deviation and solving the problem of difficulty in controlling the overall count of traditional slub yarn. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the phase-spun fancy yarn of the present invention;

[0025] Figure 2 This is a schematic diagram of the production apparatus for phase-spun fancy yarns according to the present invention.

[0026] Figure 3 This is a schematic diagram of the control system for the production apparatus of phase-spun fancy yarn of the present invention;

[0027] Figure 4 This is a schematic diagram of the first drive device in the phase-spun fancy yarn production apparatus of the present invention.

[0028] Figure 5 This is a partial structural diagram of the first straight rod in the phase-spinning fancy yarn production device of the present invention.

[0029] Figure 6 This is a schematic diagram of the movement of the first side strip in the phase-spun fancy yarn production device of the present invention.

[0030] Figure 7 This is a partial structural diagram of the phase-spun fancy yarn production apparatus of the present invention. Figure 1 ;

[0031] Figure 8 This is a partial structural diagram of the phase-spun fancy yarn production apparatus of the present invention. Figure 2 ;

[0032] In the diagram: 100, phase-spun fancy yarn; 11, base yarn section; 12, wave yarn section; 121, first cone section; 122, middle section; 123, second cone section;

[0033] 20. Sliver to be twisted; 21. Front drafting device; 211. Front roller; 212. Front skin roller; 213. Third drive device; 2131. Third speed sensor; 22. Phase spinning mechanism; 221. First drive device; 2211. First drive motor; 2212. First speed sensor; 2213. Cam; 2214. Camshaft; 2215. First straight rod; 2216. Second straight rod; 2217. Spring; 2218. Fixed rod; 2219. Arc groove; 222. First side strip; 223. Second side strip; 224. Second drive device; 225. Drive wheel; 226. Driven wheel; 2241. Second speed sensor; 23. Yarn guiding mechanism; 24. Control unit. Detailed Implementation

[0034] 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.

[0035] The purpose of this invention is to provide a phase-spun fancy yarn and its production apparatus to solve the problems existing in the prior art and improve the weaving performance of fancy yarns.

[0036] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Example 1

[0038] like Figure 1 As shown, this embodiment provides a phase-spun fancy yarn 100, including a base yarn segment 11 and a wave yarn segment 12, with all the base yarn segments 11 and all the wave yarn segments 12 interleaved along the length direction of the phase-spun fancy yarn 100.

[0039] The wavy yarn segment 12 comprises a first conical segment 121, a middle segment 122, and a second conical segment 123 connected in sequence. The diameter of the first conical segment 121 gradually decreases from the end near the middle segment 122 to the end away from the middle segment 122. Similarly, the diameter of the second conical segment 123 gradually decreases from the end near the middle segment 122 to the end away from the middle segment 122. The diameter of the middle segment 122 is larger than the diameter of the base yarn segment 11. A key improvement is that the linear density of the base yarn segment 11 is equal to the linear density of the wavy yarn segment 12. This means that the amount of fiber per unit length of yarn is constant, and the change in thickness is achieved by altering the aggregation pattern of the fiber distribution (i.e., diameter), rather than by instantaneously changing the amount of fiber fed in.

[0040] In this embodiment, the diameter of the end of the first tapered segment 121 furthest from the middle segment 122 is equal to the diameter of the adjacent base yarn segment 11, achieving a smooth transition. The diameter of the end of the second tapered segment 123 furthest from the middle segment 122 is also equal to the diameter of the adjacent base yarn segment 11, similarly achieving a smooth transition.

[0041] In this embodiment, the phase-spun fancy yarn 100 is pure cotton fiber yarn. Of course, depending on actual needs, it can also be a blended yarn such as polyester-cotton blended yarn, or a composite yarn such as core-spun yarn. The yarn sliver of the phase-spun fancy yarn 100 can be made of at least one of the following: natural fibers (such as cotton, wool, silk, linen), man-made fibers (such as viscose, modal), or synthetic fibers (such as polyester, nylon, acrylic).

[0042] Specific yarn parameters may be as follows: the linear density of the base yarn segment 11 is 10 tex to 100 tex, and the length of the base yarn segment 11 between two adjacent wave yarn segments 12 is 10 mm to 100 mm. The total length of the wave yarn segments 12 is 5 mm to 15 mm.

[0043] Example 2

[0044] like Figures 2 to 8 As shown, this embodiment also provides a production apparatus for producing the above-mentioned phase-spun fancy yarn 100, including a front drafting device 21, a yarn guiding mechanism 23, a phase spinning mechanism 22, a first driving device 221, a second driving device 224, and a control unit 24.

[0045] The front drafting device 21 includes a front roller 211 and a front slip roller 212, used to draft the fed roving into the desired sliver. The yarn guiding mechanism 23 is used to guide the yarn. The phase spinning mechanism 22 is disposed on the yarn channel between the front drafting device 21 and the yarn guiding mechanism 23.

[0046] The phase spinning mechanism 22 includes a driving wheel 225, a driven wheel 226, and an annular circular belt. The annular circular belt is wound around the driving wheel 225 and the driven wheel 226. The side strip of the annular circular belt near the front drafting device 21 is the first side strip 222, and the side strip away from the front drafting device 21 is the second side strip 223. The yarn strand between the front drafting device 21 and the yarn guiding mechanism 23 is the strand to be twisted 20. The first side strip 222 and the second side strip 223 are respectively in sliding engagement with the strand to be twisted 20. The first side strip 222 and the second side strip 223 are parallel to each other, making the strand to be twisted 20 S-shaped. The encirclement angle between the strand to be twisted 20 and the second side strip 223 is 10°~90°, and the encirclement angle between the strand to be twisted 20 and the first side strip 222 is 10°~90°.

[0047] The first driving device 221 is used to drive the first side strip 222 to reciprocate periodically to change the tangential friction force applied by the first side strip 222 to the sliver to be twisted 20 and the tangential friction force applied by the second side strip 223 to the sliver to be twisted 20. This reciprocating motion is perpendicular to the axial direction of the first side strip 222, thereby periodically changing the tangential friction force applied by the first side strip 222 and the second side strip 223 to the sliver to be twisted 20. Since the annular belt rotates and the first side strip 222 and the second side strip 223 are parallel to each other, making the sliver to be twisted 20 S-shaped, the linear motion directions of the first side strip 222 and the second side strip 223 are exactly opposite. The first side strip 222 and the second side strip 223 cause the sliver to be twisted 20 to rotate twice as much. It can be understood that when the sliver to be twisted 20 passes the first side strip 222, it undergoes a rubbing motion in the first direction under the action of the first side strip 222. When the sliver to be twisted 20 passes the second side strip 223, it also undergoes a rubbing motion in the first direction under the action of the second side strip 223. Since the first side strip 222 and the second side strip 223 are both part of the annular belt, their motion speeds are equal and their motion directions are opposite. The sliver 20 to be twisted between the front roller 211 and the first side strip 222 is called the first sliver; the sliver 20 to be twisted between the first side strip 222 and the second side strip 223 is called the second sliver; and the sliver 20 to be twisted between the second side strip 223 and the yarn guiding mechanism 23 is called the third sliver. During operation, the first side strip 222 twists the first sliver and untwists the second sliver. After being twisted and untwisted by the first side strip 222, the sliver 20 becomes slightly fluffy, resulting in a larger diameter. Similarly, the second side strip 223 twists the second sliver and untwistends the third sliver. After the sliver 20 is twisted and untwisted by the second side strip 223, it becomes slightly looser, causing the diameter of the sliver 20 to thicken. The change in the magnitude of the tangential friction between the first side strip 222, the second side strip 223, and the sliver 20 changes the amount of change in the diameter of the sliver 20. When the tangential friction between the first side strip 222, the second side strip 223, and the sliver 20 is less than a certain value, the twisting and untwisting effects of the first side strip 222 and the second side strip 223 on the sliver 20 can be ignored (i.e., the diameter of the sliver 20 will not thicken after passing through the first side strip 222 and the second side strip 223). In this embodiment, since the tangential friction applied to the sliver 20 by the first side strip 222 and the second side strip 223 changes periodically, this causes the diameter of the sliver 20 to change periodically. When the tangential frictional force applied to the sliver 20 by the first side strip 222 and the second side strip 223 increases, the sliver 20 becomes thicker; when the frictional force decreases, the sliver 20 becomes thinner. By periodically changing the frictional force, alternating wave yarn segments 12 and base yarn segments 11 are formed under constant feeding conditions (constant speed output of the front roller 211).

[0048] In this embodiment, "phase spinning" in the phase-spun fancy yarn refers to the following: under the driving action of the first driving device 221, the tangential friction force applied by the first side strip 222 and the second side strip 223 to the sliver to be twisted changes periodically. The tangential friction force has a maximum value and a minimum value, and exhibits a specific waveform change. The peak of the specific waveform corresponds to the maximum value of the tangential friction force, and the trough of the specific waveform corresponds to the minimum value of the tangential friction force. At a certain moment, the tangential friction force applied by the first side strip 222 and the second side strip 223 to the sliver to be twisted corresponds to a phase of the specific waveform.

[0049] The specific structure of the first drive device 221 includes a first drive motor 2211, a cam 2213, a T-shaped rod, a spring 2217, and a fixed rod 2218. The first drive motor 2211 is fixed by a bracket, and its output shaft is fixedly connected to the camshaft 2214 of the cam 2213. The T-shaped rod consists of a first straight rod 2215 and a second straight rod 2216 fixed perpendicularly to each other. One end of the first straight rod 2215 is in contact with the wheel surface of the cam 2213. The fixed rod 2218 is fixedly installed and has a through hole. The second straight rod 2216 passes through the through hole and is clearance-fitted with it, and can slide along the through hole. The spring 2217 is sleeved on the second straight rod 2216, with one end abutting against the first straight rod 2215 and the other end abutting against the fixed rod 2218, and is used to provide an elastic force to keep the first straight rod 2215 pressing against the wheel surface of the cam 2213. The first side strip 222 is engaged with the first straight rod 2215. When the first drive motor 2211 drives the cam 2213 to rotate, the profile of the cam 2213 is converted into the periodic linear reciprocating motion of the first side strip 222 through the T-shaped rod.

[0050] In this embodiment, the first straight rod 2215 is vertically arranged, and a recessed arc-shaped groove 2219 is provided on the top end face of the first straight rod 2215. The first side strip 222 is engaged with the arc-shaped groove 2219, so that the first straight rod 2215 can drive the first side strip 222 to reciprocate linearly.

[0051] The second drive unit 224 drives the drive wheel 225 to rotate, which in turn drives the annular belt to rotate. This movement prevents the sliver 20 to be twisted from constantly rubbing against the same position of the first side strip 222 and the second side strip 223, preventing fiber wear and accumulation, and ensuring the stability and continuity of production. The second drive unit 224 can be implemented using a linear module or a cylinder.

[0052] The control unit 24 employs a programmable logic controller (PLC), whose signal output terminals are electrically connected to the first drive motor 2211, the second drive device 224, and the servo motor (i.e., the third drive device 213) driving the front roller 211 in the front drafting device 21. Through programming, the control unit 24 can precisely control the rotational speed and phase of the first drive motor 2211 (thus controlling the spacing and shape of the wave yarn segments 12), the motion frequency and stroke of the second drive device 224, and ensure that the constant speed output of the front roller 211 is synchronized with the motion of the phase spinning mechanism 22, thereby achieving precise and programmable control of the fancy effect parameters. In this embodiment, a first speed sensor 2212 for detecting the output speed of the first drive motor 2211, a second speed sensor 2241 for detecting the output speed of the second drive device 224, and a third speed sensor 2131 for detecting the output speed of the third drive device 213 are also provided. The first speed sensor 2212, the second speed sensor 2241, and the third speed sensor 2131 are respectively connected to the control unit 24 via signals.

[0053] It is worth noting that the direction in which the first driving device 221 drives the first side strip 222 to reciprocate is perpendicular to the axis of the first side strip 222. Furthermore, in this embodiment, there are two first driving devices 221, and the two driving devices move synchronously to drive the first side strip 222 to reciprocate.

[0054] The working principle of the production device in this embodiment is as follows: after the yarn raw material is fed into the drafting mechanism, it is output by the front roller 211 and gathered to obtain yarn sliver. The obtained yarn sliver passes through the phase spinning mechanism 22 and is guided by the yarn guiding mechanism 23, and finally wound to obtain phase spun yarn.

[0055] During operation, the front roller 211 stably supplies yarn strands; the second side strip 223 and the first side strip 222 cause the yarn strands (i.e., the strands to be twisted 20) between the front drafting device 21 and the yarn guiding mechanism 23 to be S-shaped, and both the second side strip 223 and the first side strip 222 provide tangential friction force to the strands to be twisted 20. If the first driving device 221 does not drive the first side strip 222 to move, then the tangential friction force provided by the second side strip 223 and the first side strip 222 to the strands to be twisted 20 is constant; however, since the first driving device 221 is used to drive the first side strip 222 to periodically reciprocate linearly during operation, the tangential friction force provided by the circumferential sides of the second side strip 223 and the first side strip 222 to the strands to be twisted 20 will also show periodic changes.

[0056] When the tangential friction force applied to the sliver to be twisted by the first side strip 222 and the second side strip 223 increases, the strong rubbing of the sliver to be twisted by the first side strip 222 and the second side strip 223 will cause the sliver to be twisted to become thicker. This section becomes the wavy yarn section 12 after entering the twisting zone.

[0057] When the tangential friction force applied to the sliver to be twisted by the first side strip 222 and the second side strip 223 decreases, the twisting force decreases accordingly, causing the sliver to be twisted to become relatively thinner. When the tangential friction force is less than a certain value, the sliver to be twisted becomes uniform in thickness. This uniformly thick sliver to be twisted becomes the base yarn segment 11 after entering the twisting zone.

[0058] The key to the production apparatus in this embodiment is that the shape of the wave yarn segment 12 is not formed by changing the output speed of the front roller 211, but is achieved through the periodic "reciprocating rubbing" of the intermediate link. The rhythm, force, and stroke of this "reciprocating rubbing" are determined by the shape and rotation speed of the cam 2213 and the stroke of the "T"-shaped rod, and can be precisely and independently controlled by a programmable logic controller, thereby creating a phase-spun fancy yarn 100 with adjustable length, thickness, and spacing.

[0059] It is worth noting that the motion of the first drive device 221 driving the first side strip 222 does not have to be a periodic linear reciprocating motion. It can also be other forms of reciprocating motion, as long as it can periodically change the tangential friction force applied to the sliver to be twisted by the first side strip 222 and the second side strip 223.

[0060] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A production apparatus for phase-spun fancy yarns, characterized in that: The device includes a first driving device, a second driving device, and a phase spinning mechanism disposed between a front drafting device and a yarn guiding mechanism. The phase spinning mechanism includes a driving wheel, a driven wheel, and an annular circular belt. The annular circular belt is wound around the driving wheel and the driven wheel. The side strip of the annular circular belt near the front drafting device is the first side strip, and the side strip away from the front drafting device is the second side strip. The yarn sliver between the front drafting device and the yarn guiding mechanism is the sliver to be twisted. The first side strip and the second side strip are slidably engaged with the sliver to be twisted. The first side strip and the second side strip are parallel to each other, making the sliver to be twisted S-shaped. The first driving device is used to drive the first side strip to reciprocate periodically to change the tangential friction force applied by the first side strip to the sliver to be twisted and the tangential friction force applied by the second side strip to the sliver to be twisted. The second drive device is used to drive the drive wheel to rotate.

2. The production apparatus according to claim 1, characterized in that: It also includes a control unit, which is used to control the operation of the first drive device, the second drive device and the drive device of the front roller in the front stretching device.

3. The production apparatus according to claim 2, characterized in that: The control unit is a programmable logic controller.

4. The production apparatus according to claim 1, characterized in that: The first driving device includes a first driving motor, a cam, a T-shaped rod, a spring, and a fixed rod. The first driving motor drives the cam to rotate. The T-shaped rod includes a first straight rod and a second straight rod whose one end is fixedly connected to the middle of the first straight rod. The side of the first straight rod away from the second straight rod abuts against the wheel surface of the cam. The fixed rod is fixedly installed and has a through hole. The second straight rod slides into the through hole. The spring is sleeved on the second straight rod, with one end abutting against the first straight rod and the other end abutting against the fixed rod. The first edge strip is fixedly connected and snapped into the first straight rod.

5. The production apparatus according to claim 1, characterized in that: The phase-spun fancy yarn includes a base yarn segment and a wave yarn segment, with all the base yarn segments and all the wave yarn segments interleaved along the length direction of the phase-spun fancy yarn. The wave yarn segment includes a first conical segment, a middle segment, and a second conical segment connected in sequence. The diameters of the first conical segment and the second conical segment gradually decrease from one end near the middle segment of the same wave yarn segment to the other end. The diameter of the middle segment is larger than the diameter of the base yarn segment, and the linear density of the base yarn segment is equal to the linear density of the wave yarn segment.

6. The production apparatus according to claim 5, characterized in that: The diameter of the end of the first conical segment away from the middle segment of the same wave-shaped yarn segment is equal to the diameter of the adjacent base yarn segment; the diameter of the end of the second conical segment away from the middle segment of the same wave-shaped yarn segment is equal to the diameter of the adjacent base yarn segment.

7. The production apparatus according to claim 5, characterized in that: The phase-spun fancy yarn is a pure yarn, a blended yarn, or a composite yarn.

8. The production apparatus according to claim 5, characterized in that: The yarn slivers of the phase-spun fancy yarn are made of at least one of natural fibers and synthetic fibers.

9. The production apparatus according to claim 5, characterized in that: The linear density of the base yarn segment is 10 tex to 100 tex, and the length of the base yarn segment between two adjacent wavy yarn segments is 10 mm to 100 mm; the length of the wavy yarn segment is 5 mm to 15 mm, and the diameter of the middle segment is 0.1 mm to 0.4 mm.

10. The production apparatus according to claim 5, characterized in that: The phase-spun fancy yarns are manufactured using ring spinning, Siro spinning, or compact spinning.

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