Slub yarn and spinning method thereof for preventing end breakage

Abstract

The present invention discloses a slub yarn and a spinning method for preventing the broken ends thereof, which relates to the technical field of slub yarn production, including A-node filaments and filament nodes, wherein the A-node filaments represent the base fiber part, i.e., the pitch part, of the node filaments; the filament nodes represent the node parts of the A-node filaments; the first short fiber wrapped part represents the part of the A-node filaments after the base fiber is wrapped with short fibers, i.e., E polyester short fiber bundles in the vortex spinning process; and the second short fiber wrapped part is the part of the A-node filaments after the nodes in the vortex spinning process are wrapped with short fibers, i.e., E polyester short fiber bundles. The slub yarn and the spinning method for preventing the broken ends thereof innovatively use the node filaments and short fibers to compound the slub yarn, and have opened up a precedent for compounding the node filaments and short fibers into the slub yarn in the jet vortex spinning process, which is of great significance for expanding the varieties of jet vortex spinning, promoting the innovative combination of the upper and lower industrial chains of chemical fiber filaments and jet vortex spinning, and promoting the progress of textile technology.

Description

Technical Field

[0001] The invention relates to the technical field of slubby yarn production, in particular to a slubby yarn and a spinning method thereof for preventing the yarn from breaking. Background Art

[0002] Slub yarn is a kind of yarn with special appearance and style. Its characteristic is that the yarn surface presents irregular and slub-like thickness changes. At present, there are several ways to produce slub yarn:

[0003] ‌ Ring-spun slub yarn: It relies on the technical means of slowing down the front roller or speeding up the middle and rear rollers. By instantly adjusting the slowing down of the front roller of the spinning frame or the speeding up of the middle and rear rollers, the thickness of the output yarn is controlled to form slub yarn;

[0004] Rotor spinning slub yarn: Slub yarn is produced by controlling the cotton feeding speed and yarn drawing speed. The yarn spun by this method will produce slub yarn with varying thickness. Dampers can also be set in the rotor condensation groove to make the fiber distribution in the condensation groove uneven, so as to obtain slub yarn.

[0005] At present, there is another spinning technology, namely vortex spinning technology, which has the advantages of high speed, high efficiency and intelligence. It uses the effect of air vortex to make the fibers opened into a single state become yarns through condensation, wrapping and twisting. It is a free-end spinning method, or more precisely, a semi-free-end spinning method. However, in the spinning market, vortex spinning slubby yarn and its application have not yet been found. The fundamental reason is that it is difficult to make breakthroughs in equipment technology for the development and production of vortex spinning slubby yarn, and it cannot be industrialized. Due to the spinning mechanism of vortex spinning and the high speed of vortex spinning, it is difficult to achieve the slubby effect of vortex yarn in the vortex spinning process and realize industrialization. Therefore, it is necessary to break through traditional thinking and find another way to develop and produce vortex spinning slubby yarn.

[0006] Therefore, in view of this, the existing structure and defects are studied and improved, and a slub yarn and a spinning method for preventing the yarn from breaking are proposed. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides a slub yarn and a spinning method thereof for preventing end breakage, which solves the problems raised in the above-mentioned background technology.

[0008] To achieve the above purpose, the present invention is implemented through the following technical scheme: a slub yarn, including A node filaments and filament nodes, the spinning method of the slub yarn to prevent broken ends is applied with a guide wheel assembly, the guide wheel assembly includes a B1 guide wheel, a B2 guide wheel, a B3 guide wheel, a wire groove, an air jet hole, a bearing bracket, an air guide pipe, an air jet pipe, a fixed arc part, a spring, a dredging needle and an adjusting push rod, the surfaces of the B1 guide wheel, the B2 guide wheel and the B3 guide wheel are all provided with a wire groove, and the inner walls of the wire grooves are provided with air jet holes on both sides, and the two ends of the B1 guide wheel, the B2 guide wheel and the B3 guide wheel are rotatably connected A bearing bracket is provided, and an air guide pipe is connected to the side of the bearing bracket, an air jet pipe is connected to the end of the air guide pipe, and the air jet pipe is located inside the B1 guide wheel, the B2 guide wheel, and the B3 guide wheel, and fixed arc parts are equidistantly fixed on the outer wall of the air jet pipe, a spring is provided on one side of the air jet hole in the inner cavity of the B1 guide wheel, the B2 guide wheel, and the B3 guide wheel, and a clearing needle is connected to the end of the spring, an adjusting push rod is connected to the end face of the bearing bracket, a C front rubber roller is provided below the guide wheel assembly, and a D front roller is provided below the C front rubber roller, and a gripping jaw is formed between the C front rubber roller and the D front roller.

[0009] Furthermore, A node filaments and E polyester staple fiber bundles are gathered inside the holding jaws, and an F spinning assembly is arranged obliquely below the holding jaws, a G tension roller is arranged below the F spinning assembly, and an H bamboo knot yarn bobbin is arranged below the G tension roller.

[0010] Furthermore, the spinning method for preventing slub yarn from breaking comprises the following steps:

[0011] Step 1: After unwinding, the A-node filament is guided by the B1, B2 and B3 guide wheels and enters the holding jaws formed between the C front rubber roller and the D front roller, and the A-node filament and the E polyester staple fiber bundle after drafting meet at the jaws, wherein at least one of the B1, B2 and B3 guide wheels is adjusted in position by adjusting the push rod to adjust the tension to prevent the spinning end from breaking;

[0012] Step 2: After the A node filaments and the E polyester staple fiber bundles meet, they are output from the jaws and then sucked into the F spinning assembly by the suction nozzle. Under the action of the vortex, the A node filaments are twisted and wrapped by the E polyester staple fiber bundles to form slub yarns;

[0013] Step 3: The slub yarn is wound into H slub yarn through the yarn introduction channel and the G tension roller.

[0014] Furthermore, in the step 1, when the A node filament and the E polyester staple fiber bundle meet at the jaws, the A node filament is located in the middle of the E polyester staple fiber bundle.

[0015] Furthermore, in the step 2, the spinning assembly F includes but is not limited to a spindle, a nozzle, a vortex tube, and a needle seat.

[0016] Furthermore, in the steps one and two, the fiber bundles formed by the pre-stretched A node filaments and the E polyester staple fiber bundles after double stretching need to be fed into the holding jaws at the same time, and when outputting from the holding jaws, it must be ensured that the A node filaments and the E polyester staple fiber bundles are sucked into the suction nozzle at the same time.

[0017] Furthermore, in the step 2, when the bundle of fibers entering the suction nozzle passes through the nozzle, spindle, and vortex tube under high-speed airflow, the fiber flow in a single fiber state is twisted and wrapped around the surface of the A-node filament due to the vortex effect. The A-node filament is in a wrapped and coated state, forming a vortex-spun composite composed of a single fiber and the A-node filament.

[0018] Furthermore, in the step 2, because the amount of the E polyester staple fiber bundle and the A node filament sucked into the suction nozzle is consistent with the amount of the vortex spun yarn after output, the composite yarn after output still maintains the shape of the A node filament, has the same pitch, node length and multiple thickness, that is, it is a bamboo yarn with a bamboo node shape.

[0019] Furthermore, a bamboo-node yarn is prepared using the spinning method for preventing bamboo-node yarn from breaking, wherein the outer wall of the A-node filament is provided with a filament node, and the outer wall of the A-node filament is provided with a first short fiber wrapped part, and the outside of the filament node is provided with a second short fiber wrapped part.

[0020] The present invention provides a slub yarn and a spinning method thereof for preventing end breakage, which have the following beneficial effects:

[0021] 1. The slubby yarn and the spinning method for preventing the broken ends thereof, by using the method to prepare the air jet vortex spinning long and short slubby yarn, innovatively using the node filament and the short fiber to compound the slubby yarn, opened up a precedent for compounding the node filament and the short fiber into the slubby yarn in the air jet vortex spinning, and have important significance for expanding the varieties of air jet vortex spinning, promoting the innovative combination of the upper and lower industrial chains of chemical fiber filament and air jet vortex spinning, and promoting the progress of textile technology.

[0022] 2. The slub yarn and the spinning method thereof for preventing the yarn from breaking are characterized in that hot steam is ejected from the hole position on the surface of the jet pipe and ejected from the jet hole to the surface of the A-node filament inside the wire slot. The hot steam contains a certain amount of water to moisten the A-node filament, and can reduce burrs in cooperation with the combing mechanism. Moreover, since the fixed arc part is located at the empty space of the A-node filament, the jet hole located at the empty space of the A-node filament is blocked, thereby preventing the hot steam from being ejected from the empty space to the empty space and being wasted. At the same time, the dredging needle passes through the jet hole to clear the blockage, thereby preventing the impurities on the surface of the A-node filament from being attached to the jet hole and causing blockage during the transmission of the A-node filament. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of a top cross-sectional structure of a slub yarn of the present invention;

[0024] Figure 2 It is a schematic diagram of the front cross-sectional structure of a slub yarn of the present invention;

[0025] Figure 3 It is a schematic diagram of the process structure of a spinning method for preventing slub yarn from breaking according to the present invention;

[0026] Figure 4 It is a schematic diagram comparing the index parameters of a slub yarn of the present invention with the index parameters of a node polyester filament under the same parameters;

[0027] Figure 5 This is a schematic diagram of the appearance structure of the B1 godet of the present invention;

[0028] Figure 6 It is a schematic diagram of the structure of the jet pipe of the present invention;

[0029] Figure 7 It is a schematic diagram of the fixed arc structure of the present invention;

[0030] Figure 8 It is a schematic diagram of the structure of the dredging needle of the present invention.

[0031] In the figure: 1. A node filament; 2. filament node; 3. first staple fiber wrapping part; 4. second staple fiber wrapping part; 5. guide wheel assembly; 501. B1 guide wheel; 502. B2 guide wheel; 503. B3 guide wheel; 504. wire groove; 505. air jet hole; 506. bearing bracket; 507. air guide tube; 508. air jet tube; 509. fixed arc part; 510. spring; 511. dredging needle; 512. adjusting push rod; 6. C front rubber roller; 7. D front roller; 8. E polyester staple fiber bundle; 9. F spinning assembly; 10. G tension roller; 11. H bamboo yarn. DETAILED DESCRIPTION

[0032] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0033] Embodiment 1: Figure 1-Figure 4 As shown, the present invention provides a technical solution: a slub yarn, comprising a filament 1 at a node A and a filament node 2, wherein the filament node 2 is disposed on the outer wall of the filament 1 at the node A, and a first short fiber wrapping portion 3 is disposed on the outer wall of the filament 1 at the node A, and a second short fiber wrapping portion 4 is disposed on the outside of the filament node 2;

[0034] Figure 1-Figure 2In the figure, A node filament 1 represents the base fiber portion of the node filament, i.e., the pitch portion;

[0035] Filament node 2 represents the node portion of filament 1 at node A;

[0036] The first short fiber wrapped portion 3 represents the portion of the A node filament 1 after the base fiber is wrapped with short fibers, i.e., the E polyester short fiber bundle 8, in the vortex spinning process;

[0037] The second short fiber wrapped portion 4 is the portion after the A node filament 1 is wrapped by the short fiber, ie, the E polyester short fiber bundle 8 at the node in the vortex spinning process.

[0038] A spinning method for preventing slubby yarn from breaking ends is applied to the above-mentioned slubby yarn. The spinning method for preventing slubby yarn from breaking ends comprises the following operating steps:

[0039] Step 1: After unwinding, the A-node filament 1 is guided by the B1 guide wheel 501, the B2 guide wheel 502, and the B3 guide wheel 503 and enters the holding jaws formed between the C front rubber roller 6 and the D front roller 7, and the A-node filament 1 and the E polyester staple fiber bundle 8 after being drawn meet at the jaws, wherein at least one of the B1 guide wheel 501, the B2 guide wheel 502, and the B3 guide wheel 503 is adjusted in position by adjusting the push rod 512 to adjust the tension to prevent the spinning line from breaking;

[0040] Step 2: After the A node filament 1 and the E polyester staple fiber bundle 8 meet, they are output from the jaws and then sucked into the F spinning assembly 9 by the suction nozzle. Under the action of the vortex, the A node filament 1 is twisted and wrapped by the E polyester staple fiber bundle 8 to form a slub yarn;

[0041] Step 3: The slub yarn is wound into H slub yarn bobbin 11 through the yarn introduction channel and the G tension roller 10;

[0042] In step 1, when the A node filament 1 and the E polyester staple fiber bundle 8 meet at the jaws, the A node filament 1 is located in the middle of the E polyester staple fiber bundle 8;

[0043] In step 2, the spinning assembly F 9 includes but is not limited to a spindle, a nozzle, a vortex tube, and a needle seat;

[0044] In step 1 and step 2, the pre-stretched A node filament 1 and the E polyester staple fiber bundle 8 are stretched 117 times to form a fiber bundle, which needs to be fed into the holding jaws at the same time, and when outputting from the holding jaws, it is necessary to ensure that the A node filament 1 and the E polyester staple fiber bundle 8 are sucked into the suction nozzle at the same time;

[0045] In step 2, when the bundle of fibers entering the suction nozzle passes through the nozzle, the spindle, and the vortex tube under the high-speed airflow, the fiber flow in the single fiber state is twisted and wrapped around the surface of the A node filament 1 due to the vortex effect, and the A node filament 1 is in a wrapped and coated state, forming a vortex spinning composite composed of the single fiber and the A node filament 1;

[0046] In step 2, because the amount of E polyester staple fiber bundle 8 and A node filament 1 sucked into the suction nozzle is consistent with the amount of vortex spun yarn after output, the composite yarn after output still maintains the shape of A node filament 1, with the same pitch, node length and multiple thickness, that is, bamboo yarn with bamboo node shape.

[0047] Embodiment 2: Figure 1-Figure 8 As shown, the spinning method for preventing the slub yarn from breaking is applied with a guide wheel assembly 5, a C front rubber roller 6 is arranged below the guide wheel assembly 5, and a D front roller 7 is arranged below the C front rubber roller 6, and a holding jaw is formed between the C front rubber roller 6 and the D front roller 7, and the A node filament 1 and the E polyester staple fiber bundle 8 are collected inside the holding jaw, and an F spinning assembly 9 is arranged obliquely below the holding jaw, and a F spinning assembly 9 is arranged below the F spinning assembly 9. A G tension roller 10 is arranged, and an H slub yarn bobbin 11 is arranged below the G tension roller 10. The guide wheel assembly 5 includes a B1 guide wheel 501, a B2 guide wheel 502, a B3 guide wheel 503, a wire groove 504, an air jet hole 505, a bearing bracket 506, an air guide pipe 507, an air jet pipe 508, a fixed arc part 509, a spring 510, a dredging needle 511 and an adjusting push rod 512. The B1 guide wheel 501, The surfaces of the B2 wire guide wheels 502 and the B3 wire guide wheels 503 are provided with wire grooves 504, and both sides of the inner walls of the wire grooves 504 are provided with air jet holes 505. The two ends of the B1 wire guide wheels 501, the B2 wire guide wheels 502, and the B3 wire guide wheels 503 are rotatably connected with bearing brackets 506, and the sides of the bearing brackets 506 are connected with air guide pipes 507, and the ends of the air guide pipes 507 are connected with air jet pipes 508, and the air jet pipes 508 are located inside the B1 wire guide wheels 501, the B2 wire guide wheels 502, and the B3 wire guide wheels 503. Fixed arc pieces 509 are equidistantly fixed on the outer walls of the air jet pipes 508. A spring 510 is provided on one side of the air jet hole 505 in the inner cavities of the B1 wire guide wheels 501, the B2 wire guide wheels 502, and the B3 wire guide wheels 503, and the ends of the springs 510 are connected with dredging needles 511, and the end faces of the bearing brackets 506 are connected with adjusting push rods 512;

[0048] The specific operation is as follows: after unwinding, the A-node filament 1 is guided by the wire groove 504 on the surface of the B1 wire guide wheel 501, the B2 wire guide wheel 502, and the B3 wire guide wheel 503 and enters the holding jaws formed between the C front rubber roller 6 and the D front roller 7, and the air jet 508 is fixed to one side of the bearing bracket 506 and extends into the inside of the wire guide wheel, and hot steam is injected into the air jet 508 through the air guide pipe 507. The hot steam is ejected from the hole position on the surface of the air jet 508 and ejected from the air jet hole 505 to the surface of the A-node filament 1 inside the wire groove 504. The hot steam contains a certain amount of water to wet the A-node filament 1. The A-node filament 1 is provided with a finishing comb between the wire guide wheel and the jaws to comb the A-node filament 1. Since the surface of the A-node filament 1 is moistened, its surface flatness can be improved when it is combed to reduce burrs;

[0049] When transmitting the A-node filament 1, the guide wheel rotates with the transmission of the A-node filament 1, wherein the fixed arc piece 509 is fixed to the outer wall of the jet tube 508 and remains stationary, and the end of the dredging needle 511 passes through the fixed arc piece 509 during the rotation of the guide wheel. The end of the dredging needle 511 contacts the side of the fixed arc piece 509 so that the spring 510 is compressed, and the thin end of the dredging needle 511 is pushed and moved to pass through the jet hole 505. Since the fixed arc piece 509 is located at the empty space of the A-node filament 1, This blocks the jet hole 505 located at the empty space of the filament 1 at the node A, thereby preventing the hot steam from being wasted by spraying from the empty space to the empty space. At the same time, the dredging needle 511 passes through the jet hole 505 to clear the blockage, preventing the impurities on the surface of the filament 1 at the node A from adhering to the jet hole 505 and causing blockage during the transmission process. Further, an exhaust mechanism can be provided at the empty space of the filament 1 at the node A to extract the impurities discharged due to the clearing, so as to prevent the cleaned impurities from adhering to the filament 1 at the node A due to rotation.

[0050] As the wire guide wheel continues to rotate, the end of the dredging needle 511 leaves the side of the fixed arc part 509. At this time, the spring 510 is reset and stretched, so that the dredging needle 511 is reset and leaves the jet hole 505. The jet hole 505 then resumes the jet function and sprays jets toward the surface of the filament 1 at node A, and the above operation is repeated continuously.

[0051] In summary, the slub yarn and the spinning method for preventing the yarn from breaking are used. First, after unwinding, the A-node filament 1 is guided by the B1 guide wheel 501, the B2 guide wheel 502, and the B3 guide wheel 503 to enter the holding jaws formed between the C front rubber roller 6 and the D front roller 7. The A-node filament 1 and the E polyester staple fiber bundle 8 after being drawn meet at the jaws, wherein at least one of the B1 guide wheel 501, the B2 guide wheel 502, and the B3 guide wheel 503 is adjusted in position by adjusting the push rod 512 to adjust the tension to prevent the yarn from breaking.

[0052] Step 2: After the A node filament 1 and the E polyester staple fiber bundle 8 meet, they are output from the jaws and then sucked into the F spinning assembly 9 by the suction nozzle. Under the action of the vortex, the A node filament 1 is twisted and wrapped by the E polyester staple fiber bundle 8 to form a slub yarn;

[0053] Step 3: The slub yarn is wound into an H slub yarn cone 11 through the yarn introduction channel and the G tension roller 10.

[0054] Among them, the short fibers can also use nylon short fibers, vinylon short fibers, viscose short fibers, lyocell short fibers, etc. The fineness of the short fibers is not limited to 1.33 dtex, and the length of the short fibers is not limited to 38 mm; the node filaments can also use nylon node filaments, vinylon node filaments, viscose node filaments, lyocell node filaments, etc., and the fineness of the filament monofilament is not limited to 40D;

[0055] And adopt the following vortex spinning measures:

[0056] In order to ensure that the short fibers are effectively twisted and wrapped around the polyester node filaments so that the filaments do not leak out, the following methods are adopted:

[0057] Appropriately increase the ratio of the linear speed of the friction roller and the front roller to improve the covering effect and reduce the chance of core wire exposure. Through multiple test adjustments, it was found that the wrapping and twisting effect is best when the fiber speed is around 0.97.

[0058] Appropriately increase the distance from the nozzle to the front roller. After test comparison, the coating effect is best when the distance from the nozzle to the front roller is 20mm;

[0059] In order to reduce the uneven thickness of the pitch part, the drafting multiples of the main rear zone are optimized, with the drafting of the rear zone being 3.0 times and the main drafting zone being 3.5 times;

[0060] The feeding tension is controlled between 11.5-13.5 to improve the wrapping and twisting effect;

[0061] The final parameters of the slub yarn produced are as follows: Figure 4 As shown, from Figure 4It can be seen that the developed vortex-spun slubby yarn is compared with the node polyester filament, based on the above description, the production process of the node polyester filament is consistent with the process of step one to step three of the vortex-spun slubby yarn production in the above embodiment one, but the production process of the node polyester filament does not go through the process of wet combing the filament substrate with hot steam in embodiment two, and the filament monofilament fineness of the vortex-spun slubby yarn and the node polyester filament are both 40 units D, and other indicators such as slubby length, slubby pitch, and slubby length are the same, and the draft is the same as 3.0 times, and the multiple of the node polyester filament is 3.0 times. The times of thickness of vortex-spun bamboo yarn is 1.53. It can be seen that in addition to the times of thickness of bamboo yarn being lower than that of node filament, the times of thickness of vortex-spun bamboo yarn is directly related to the specifications of node filament and the content of short fiber wrapped and twisted. Therefore, by using this method to prepare jet vortex-spun long and short bamboo yarn, innovative use of node filament and short fiber to composite bamboo yarn has opened up a precedent for composite bamboo yarn with node filament and short fiber in jet vortex spinning, which is of great significance for expanding the varieties of jet vortex spinning, promoting the innovative combination of the upper and lower industrial chains of chemical fiber filament and jet vortex spinning, and promoting the progress of textile technology.

[0062] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A spinning method for preventing slub yarn from breaking, characterized in that: The spinning method for preventing slub yarn from breaking is applied with a guide wheel assembly (5), wherein the guide wheel assembly (5) comprises a B1 guide wheel (501), a B2 guide wheel (502), a B3 guide wheel (503), a line groove (504), an air jet hole (505), a bearing bracket (506), an air guide tube (507), an air jet tube (508), a fixed arc member (509), a spring (510), a dredging needle (511) and an adjusting push rod (512), wherein the surfaces of the B1 guide wheel (501), the B2 guide wheel (502) and the B3 guide wheel (503) are all provided with a line groove (504), and both sides of the inner wall of the line groove (504) are provided with air jet holes (505), and the two ends of the B1 guide wheel (501), the B2 guide wheel (502) and the B3 guide wheel (503) are rotatably connected to the bearing bracket (506), and the side of the bearing bracket (506) is connected to the The air guide tube (507) is connected to the end of the air guide tube (507) and is connected to an air jet tube (508). The air jet tube (508) is located inside the B1 wire guide wheel (501), the B2 wire guide wheel (502), and the B3 wire guide wheel (503). The outer wall of the air jet tube (508) is equidistantly fixed with fixed arc parts (509). The inner wall of the B1 wire guide wheel (501), the B2 wire guide wheel (502), and the B3 wire guide wheel (503) is A spring (510) is arranged on one side of the air jet hole (505) in the cavity, and a clearing needle (511) is connected to the end of the spring (510); an adjustment push rod (512) is connected to the end surface of the bearing bracket (506); a C front rubber roller (6) is arranged below the guide wheel assembly (5); a D front roller (7) is arranged below the C front rubber roller (6); and a gripping jaw is formed between the C front rubber roller (6) and the D front roller (7).

2. A spinning method for preventing slub yarn from breaking according to claim 1, characterized in that: A node filaments (1) and E polyester staple fiber bundles (8) are collected inside the holding jaws, and an F spinning assembly (9) is arranged obliquely below the holding jaws, a G tension roller (10) is arranged below the F spinning assembly (9), and an H slub yarn (11) is arranged below the G tension roller (10).

3. A spinning method for preventing slub yarn from breaking according to claim 2, characterized in that: The spinning method for preventing slub yarn from breaking comprises the following steps: Step 1: After unwinding, the A-node filament (1) is guided by the B1 guide wheel (501), the B2 guide wheel (502), and the B3 guide wheel (503) to enter the holding jaws formed between the C front rubber roller (6) and the D front roller (7), and the A-node filament (1) and the E polyester staple fiber bundle (8) after being drawn meet at the jaws, wherein at least one of the B1 guide wheel (501), the B2 guide wheel (502), and the B3 guide wheel (503) is adjusted in position by adjusting the push rod (512) to adjust the tension to prevent the yarn from breaking; Step 2: After the A node filament (1) and the E polyester staple fiber bundle (8) meet, they are output from the jaws and then sucked into the F spinning assembly (9) by the suction nozzle. Under the action of the vortex, the A node filament (1) is twisted and wrapped by the E polyester staple fiber bundle (8) to form a slub yarn; Step 3: The slub yarn is passed through the yarn guide channel and the G tension roller (10) and finally wound into an H slub yarn bobbin (11).

4. A spinning method for preventing slub yarn from breaking according to claim 3, characterized in that: In the step 1, when the A node filament (1) and the E polyester staple fiber bundle (8) meet at the jaws, the A node filament (1) is located in the middle of the E polyester staple fiber bundle (8).

5. A spinning method for preventing slub yarn from breaking according to claim 4, characterized in that: In the step 2, the spinning assembly F (9) includes but is not limited to a spindle, a nozzle, a vortex tube, and a needle seat.

6. A spinning method for preventing slub yarn from breaking according to claim 5, characterized in that: In the steps 1 and 2, the pre-stretched A node filaments (1) and the E polyester staple fiber bundles (8) are stretched 117 times to form a fiber bundle, which needs to be fed into the holding jaws at the same time, and when outputting from the holding jaws, it is necessary to ensure that the A node filaments (1) and the E polyester staple fiber bundles (8) are sucked into the suction nozzle at the same time.

7. A spinning method for preventing slub yarn from breaking according to claim 6, characterized in that: In the step 2, when the bundle of fibers entering the suction nozzle passes through the nozzle, the spindle, and the vortex tube under the high-speed airflow, the fiber flow in the single fiber state is twisted and wrapped around the surface of the A node filament (1) due to the vortex effect. The A node filament (1) is in a wrapped and coated state, forming a vortex spinning composite composed of the single fiber and the A node filament (1).

8. A spinning method for preventing slub yarn from breaking according to claim 7, characterized in that: In the step 2, because the amount of the E polyester staple fiber bundle (8) and the A node filament (1) sucked into the suction nozzle is consistent with the amount of the vortex spun yarn after output, the composite yarn after output still maintains the shape of the A node filament (1), has the same pitch, node length and multiple thickness, that is, a bamboo yarn with a bamboo shape.

9. A slub yarn, prepared by using the spinning method for preventing slub yarn from breaking as claimed in claim 8, characterized in that: The outer wall of the A-node filament (1) is provided with a filament node (2), and the outer wall of the A-node filament (1) is provided with a first short fiber wrapped portion (3), and the outside of the filament node (2) is provided with a second short fiber wrapped portion (4).

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