Spinning method and device for vortex spinning slub yarn

Abstract

The present invention provides a spinning method and device for vortex-spinning segment colored yarn. By designing a group of vortex spinning machines with an additional non-uniform drafting device, the device is driven by the original drafting mechanism. On the basis of uniform drafting of the fiber strips input into the original drafting mechanism, a colored roving is fed into the additional drafting device, and together with a roller jaw in the vortex spinning machine, non-uniform drafting is achieved. The roving with varying thickness is then fed into the main drafting area of the vortex spinning frame for further drafting and mixing with the fiber strips, and then spun into vortex-spinning segment colored yarn. The present invention does not require modification of the existing vortex spinning machine drafting device, but only requires the independent installation of the additional non-uniform drafting device. The device of the present invention has a relatively simple structure, is easy to modify on the original vortex spinning machine, has stable operation, is easy to maintain, and is easy to promote, etc., and provides an effective method for efficiently spinning vortex-spinning segment colored yarn.

Description

Technical Field

[0001] The invention belongs to the technical field of air-jet vortex spinning, and relates to a spinning method and device for vortex spinning segment colored yarn. Background Art

[0002] Segment-colored yarn is a type of fancy yarn primarily produced using the fine spinning process. It offers a highly personalized, fashionable feel, and a rich color palette. It possesses a strong sense of color, three-dimensionality, and layering. Its designability makes it widely used in clothing, home textile design, and other fields. Current segment-colored yarn production methods are primarily based on ring spinning frames. By modifying the drafting roller drive mechanism, intermittent feeding of decorative roving is achieved, while continuous feeding of base yarn is achieved. The intermittent decorative roving is then combined with the base yarn and twisted to create segment-colored yarn.

[0003] Air-jet vortex spinning has been in practical use for 25 years. After several generations of technological innovation and process improvements, the adaptability of air-jet vortex spinning products to a wider range of fiber raw materials has continued to expand. Chemical fibers such as polyester and viscose are now being produced in large quantities, and the variety of air-jet vortex spinning yarns has become increasingly diverse. Furthermore, the spinning speed of air-jet vortex spinning has also increased significantly, generally around 450 m / min, and can reach a maximum of 550 m / min. Vortex spinning machines offer certain advantages, including high spinning speeds, a high degree of automation, and low worker workload. However, vortex spinning machines use fiber slivers as raw material, which have large weight and volume, requiring high drafting ratios. The drafting rollers operate at high speeds and have high inertia, making it difficult to modify the drafting mechanism of vortex spinning machines, similar to how they are modified for ring spinning frames, to produce vortex-spun colored yarn. Patent publication number CN 108588937 B discloses a long-segment vortex-spun segment-colored yarn and a spinning method thereof. Long-segment multicolored cotton slivers are produced using a long-segment multicolored draw frame device, and the resulting slivers are then processed on a vortex spinning frame to produce long-segment multicolored vortex-spun yarn. This method essentially prepares segment-colored fiber slivers in a pre-spinning process, which are then spun into yarn on a vortex spinning frame. The resulting segment-colored yarn cannot be controlled during the vortex spinning process. Patent publication number CN 113684577 A describes a method for producing short, segmented, colored yarn using vortex spinning. This method requires the installation of a double-hole bellmouth on the vortex spinning rear roller, as well as a yarn tensioning device and a spindle hanging device on the sliver guide. The sliver and decorative yarn pass through the vortex spinning rear roller and enter the middle and front rollers. The decorative yarn is drawn and cut into fiber segments of a certain length as it passes through the rear, middle, and front rollers. Ordinary slivers pass through the vortex spinning spindle and needle holder, where the vortex currents expose the fiber segments outside the ordinary core fiber. These segments are then passed through friction rollers to form short, segmented, colored yarn. This method utilizes the random breaking of decorative yarn in the drafting zone to form short segments of decorative yarn, which are then mixed with normally drafted fiber slivers to form yarn. This method utilizes the drafting characteristics of the rollers alone, without modifying the drafting mechanism. The resulting colored yarn has a single characteristic and cannot be effectively adjusted, resulting in significant limitations. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a spinning method and apparatus for producing vortex-spun segment colored yarn, and more particularly, to a vortex-spun segment colored yarn spinning apparatus with an additional drafting device. The present invention utilizes a specially designed additional drafting device to achieve transmission, pressure application, and intermittent drafting of the decorative roving. This produces decorative yarn fiber slivers of varying thickness, which are then mixed with normally drafted fiber slivers to form yarn, thereby achieving the spinning of characteristically controllable vortex-spun segment colored yarn.

[0005] The technical solutions of the present invention are as follows:

[0006] The present invention provides a spinning device for vortex spinning colored yarn, such as Figure 1 As shown, an additional drafting device is added to the drafting mechanism of the vortex spinning machine. This additional drafting device is divided into a decorative yarn roving feeding assembly and a decorative yarn roving output assembly. Specifically, the spinning process involves feeding the base fiber strip through the guide sliver bell mouth into the drafting mechanism of the vortex spinning machine. The base fiber strip is then uniformly drafted and output through multiple stages, including the rear roller and rear top rubber roller, the second middle roller and the second middle top rubber roller, the first middle roller and the first middle top rubber roller, and the front roller and the front top rubber roller. The decorative yarn roving is fed from the yarn guide bell mouth into the decorative yarn roving feeding assembly. The decorative yarn roving feeding assembly contacts the rear top rubber roller with a certain pressure, and the rear top rubber roller drives the decorative yarn roving feeding assembly to operate by friction. The decorative yarn roving then enters the decorative yarn roving output assembly. The decorative yarn roving output assembly contacts the second middle top rubber roller with a certain pressure, and the second middle top rubber roller drives the decorative yarn roving output assembly to operate by friction. There is a speed difference between the second upper rubber roller and the rear upper rubber roller in the vortex spinning machine, so there is also a speed difference between the operating speed of the decorative yarn roving output assembly and the decorative yarn roving feeding assembly, which realizes the drafting process of the decorative yarn roving. At the same time, the output upper roller of the decorative yarn roving output assembly is circumferentially distributed with several grooves of designed specifications. The decorative yarn roving will be intermittently gripped when passing through the grooved roller, and then subjected to non-uniform drafting. After passing through this device, the decorative yarn roving is fed into the main drafting area of the vortex spinning machine in an uneven thickness form, and merged with the basic fiber strips in the main drafting area. The mixed fiber strips are further drafted into the spinning rotor and are finally spun into vortex spinning segment colored yarn.

[0007] The decorative yarn roving feeding assembly is mainly composed of four parts, namely the feeding assembly main body bracket, the feeding assembly sub-bracket, the feeding lower roller and the feeding upper roller. Figure 4 The assembly structure of the decorative yarn roving feeding assembly is shown in Figure 5As shown, the decorative yarn roving feed assembly utilizes a two-spindle design with a symmetrical left-right structure. The upper end of the feed assembly's main support is horizontal, with folded spring structures C and D extending vertically downward from the edge and a certain position in the center, respectively. The folded spring structure further extends vertically downward from a vertical plane structure with a closed chute in the middle and a semi-open chute at the bottom. The lower and upper feed rollers are mounted in the chute of the feed assembly sub-support. The feed assembly sub-support features a cantilevered clamping shaft on the side, which is mounted via the cantilevered clamping shaft into the closed chute of the vertical plane structure of the feed assembly main support. Simultaneously, the upper feed roller, located in the feed assembly sub-support, extends axially toward the center of the main body and engages the semi-open chute of the vertical plane structure.

[0008] The feeding lower roller and the feeding upper roller are both two-layer structures, the center of the roller is the rotating shaft, the inner layer of the roller is a metal round roller, and the outer layer of the roller is a rubber layer, and both have a uniform structure.

[0009] The decorative yarn roving output assembly is also mainly composed of four parts, namely the output assembly main bracket, the output assembly sub-bracket, the output lower roller and the output upper roller. Figure 4 As shown in the figure. The assembly structure of the decorative yarn roving output component is as shown in the figure. Figure 5 As shown, the decorative yarn roving output assembly adopts a two-spindle design with a symmetrical structure. The upper end of the output assembly's main support is horizontal, with folded spring structures A and B extending vertically downward from the edge and a certain position in the middle, respectively. The folded spring structure further extends downward into a vertical plane structure with a closed chute in the middle and a semi-open chute at the bottom. The lower and upper output rollers are installed in the chute of the output assembly sub-support. The side of the output assembly sub-support features a cantilevered clamping shaft B, which is installed through the cantilevered clamping shaft B into the closed chute of the vertical plane structure of the output assembly main support. Simultaneously, the output upper roller, located in the output assembly sub-support, extends axially toward the center of the main body, and the center axis of the output upper roller snaps into the semi-open chute of the vertical plane structure.

[0010] Both the lower and upper output rollers are two-layer structures, with the center of the rollers as the rotation axis. The inner layer is a metal round roller, and the outer layer is a rubber layer. The lower output roller is a uniform structure. The structure of the upper output roller is shown in Figure 7. The rubber layer of the upper output roller has a grooved structure. A certain number of closed-end grooves are distributed around the circumference of the upper output roller. The grooves of the upper output roller are parallel to the central axis of the upper output roller. The area between the grooves of the upper output roller rubber layer remains consistent with the outer diameter of the upper output roller.

[0011] The product characteristics of the vortex-spun segmented colored yarn can be adjusted by changing the upper roller diameter and groove distribution pattern of the output upper roller to adjust the segment length and distribution pattern of the segmented colored yarn.

[0012] The decorative yarn roving feeding assembly and the decorative yarn roving output assembly are both mounted on the upper rocker arm of the vortex spinning frame, as shown in FIG. Figure 2 As shown, when the upper rocker arm is raised, the decorative yarn roving feed assembly and the decorative yarn roving delivery assembly disengage from the rear and middle upper rubber rollers, without affecting the operation of the original drafting mechanism of the vortex spinning machine. When the upper rocker arm is depressed, the decorative yarn roving feed assembly and the decorative yarn roving delivery assembly engage the rear and middle upper rubber rollers, respectively. At this point, the lower feed roller of the decorative yarn roving feed assembly, driven by the rear upper rubber roller, slides along the chute of the feed assembly sub-bracket toward the upper feed roller. The upper feed roller transmits force through its central axis to the vertical plane structure of the feed assembly main bracket, which then transmits it to the feed assembly main bracket fixed to the upper rocker arm via folded spring structure C and folded spring structure D. The compression of the folded spring structure provides pressure between the rollers to meet transmission and drafting requirements. Similarly, the force and operation of the decorative yarn roving delivery assembly are identical to those of the decorative yarn roving feed assembly.

[0013] The vortex spinning segment colored yarn spinning method can also adjust the yarn segment colored length within a certain range by adjusting the distribution of the drafting multiples of each zone of the vortex spinning machine.

[0014] Beneficial effects of the present invention:

[0015] 1. The present invention can realize the spinning of vortex-spinning segment colored yarn with controllable characteristics, effectively expanding the product categories of vortex-spinning segment colored yarn.

[0016] 2. The present invention only requires an additional drafting mechanism to be added to the original drafting mechanism of the vortex spinning machine, and does not require the original drafting mechanism of the vortex spinning machine to be modified. It can realize the feeding and non-uniform drafting of the decorative yarn roving, and is equipped with different groove-shaped output rubber rollers and rear zone drafting multiples. Different specifications of vortex spinning segment colored yarns can be spun, which has better economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the spinning principle of colored yarn in vortex spinning section;

[0018] Figure 2 Schematic cross section of the drafting mechanism of the vortex spinning colored yarn device;

[0019] Figure 3 Schematic diagram of the colored yarn drafting mechanism in the vortex spinning section;

[0020] Figure 4 Component diagram of roving feed assembly;

[0021] Figure 5 Assembly diagram of roving feed assembly;

[0022] Figure 6 Component diagram of roving output;

[0023] Figure 7 (a) is a left side view of the grooved rubber roller structure;

[0024] Figure 7(b) is a front view of the grooved rubber roller structure;

[0025] Figure 8 Assembly diagram of roving output assembly;

[0026] Figure 9 Schematic diagram of the vortex spinning colored yarn structure.

[0027] In the figure: 1 basic fiber strip; 2 decorative yarn roving; 3 guide flare; 4 yarn guide flare; 5 rear roller; 6 rear rubber roller; 7 decorative yarn roving feeding assembly; 8 decorative yarn roving output assembly; 9 middle second rubber roller; 10 middle second roller; 11 middle first roller; 12 middle first rubber roller; 13 front roller; 14 front rubber roller; 15 vortex spinning frame; 16 upper rocker arm; 17 spinning rotor; 18 vortex spinning segment colored yarn; 701 feeding assembly main frame; 702 feeding lower roller; 703 feeding upper roller; 704 folding spring structure C; 705 folding spring structure D; 706 vertical plane structure; 707 feeding assembly sub-bracket; 708 cantilever clamping shaft; 709 Upper feed roller center shaft; 710 Lower feed roller center shaft; 711 Retaining ring; 712 Feed assembly main bracket fixing hole; 801 Output assembly main bracket; 802 Output lower roller; 803 Output upper roller; 804 Folding spring structure A; 805 Folding spring structure B; 806 Vertical plane structure; 807 Output assembly sub-bracket; 808 Cantilever clamp shaft B; 809 Lower output roller center shaft; 810 Center shaft retaining ring; 811 Bracket fixing hole; 803a Upper output roller center shaft; 803b Upper output roller inner metal roller; 803c The area between the grooves in the rubber layer of the output upper roller; 803d The grooves in the rubber layer of the output upper roller. 181 Color segment; 182 Base yarn segment. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention are described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] The present embodiment is a spinning method for polyester vortex spinning segment colored yarn. Figure 1As shown, by adding the device of the present invention to the drafting mechanism of the vortex spinning machine, the device is divided into a decorative yarn roving feeding assembly 7 and a decorative yarn roving output assembly 8. The specific spinning process is that the basic fiber strip 1 is fed into the drafting mechanism of the vortex spinning machine through the guide sliver bell mouth 3, and is uniformly drafted and output in multiple sections by the rear roller 5 and the rear rubber roller 6, the second middle roller 10 and the second middle rubber roller 9, the first middle roller 11 and the first middle rubber roller 12, and the front roller 13 and the front rubber roller 14. The decorative yarn roving 2 is fed into the decorative yarn roving feeding assembly 7 from the yarn guide bell mouth 4. The decorative yarn roving feeding assembly 7 contacts the rear upper glue roller 6 and has a certain pressure. The rear upper glue roller 6 drives the decorative yarn roving feeding assembly 7 to operate by friction. Then the decorative yarn roving enters the decorative yarn roving output assembly 8. The decorative yarn roving output assembly 8 contacts the second middle upper glue roller 9 and also has a certain pressure. The second middle upper glue roller 9 drives the decorative yarn roving output assembly 8 to operate by friction. There is a speed difference between the second upper rubber roller and the rear upper rubber roller in the vortex spinning machine, so there is also a speed difference between the operating speed of the decorative yarn roving output component 8 and the decorative yarn roving feeding component 7, that is, the drawing process of the decorative yarn roving is realized. At the same time, the output upper roller 803 of the decorative yarn roving output component 8 is circumferentially distributed with grooves of design specifications. The decorative yarn roving will be intermittently gripped when passing through the grooved roller, and then subjected to uneven drawing. After passing through the additional drawing device, the decorative yarn roving is fed into the main drawing area of the vortex spinning machine in an uneven thickness form, and merged with the basic fiber strip 1 in the main drawing area. The mixed fiber strip is further drawn into the spinning cup 17, and is finally spun into the vortex spinning segment colored yarn 18.

[0030] The decorative yarn roving feeding assembly 7 is mainly composed of four parts, namely the feeding assembly main frame 701, the feeding assembly sub-frame 707, the feeding lower roller 702 and the feeding upper roller 703. Figure 4 As shown. The assembly structure of the decorative yarn roving feeding component 7 is as shown Figure 5 As shown, the decorative yarn roving feed assembly 7 utilizes a two-spindle design with a symmetrical left-right structure. The upper end of the feed assembly main frame 701 is horizontal, with folded spring structures C 704 and D 705 extending vertically downward from the edge and a certain position in the center, respectively. The folded spring structure further extends downward into a vertical planar structure 706, which has a closed chute in the middle and a semi-open chute at its bottom. The lower feed roller 702 and upper feed roller 703 are mounted in the chute of the feed assembly sub-frame 707. The feed assembly sub-frame 707 has a cantilevered clamping shaft 708 on its side, which is mounted in the closed chute of the vertical planar structure 706 on the feed assembly main frame 701. Simultaneously, the upper feed roller 703, located in the feed assembly sub-frame 707, extends axially toward the center of the main frame, and its central axis 709 engages the semi-open chute of the vertical planar structure 706.

[0031] The feeding lower roller 702 and the feeding upper roller 703 are both two-layer structures, with the center of the roller being the rotating shaft, the inner layer of the roller being a metal round roller, and the outer layer of the roller being a rubber layer, and both are of uniform structure.

[0032] The decorative yarn roving output assembly 8 is also mainly composed of four parts, namely the output assembly main frame 801, the output assembly sub-frame 807, the output lower roller 802 and the output upper roller 803. Figure 4 As shown. The assembly structure of the decorative yarn roving feeding component 8 is as shown Figure 5 As shown, the decorative yarn roving output assembly 8 utilizes a two-spindle design with a symmetrical left-right structure. The upper end of the output assembly main frame 801 is horizontal, with folded spring structures A804 and B805 extending vertically downward from the edge and a certain position in the middle, respectively. The folded spring structure further extends downward to form a vertical planar structure 806, which has a closed chute in the middle and a semi-open chute at its bottom. The lower and upper output rollers 802 and 803 are mounted in the chute of the output assembly sub-frame 807. The output assembly sub-frame 807 has a cantilevered clamping shaft B808 on its side, which is mounted in the closed chute of the vertical planar structure 806 on the output assembly main frame 801. Simultaneously, the upper output roller 803, located in the output assembly sub-frame 807, extends axially toward the center, with the central axis 809 of the main frame engaging the semi-open chute of the vertical planar structure 806.

[0033] The lower output roller 802 and upper output roller 803 are both two-layer structures, with the roller center being the rotation axis, the inner roller layer being a metal round roller, and the outer roller layer being a rubber layer. The lower output roller 802 has a uniform structure. The structure of the upper output roller 803 is shown in Figure 7. The rubber layer of the upper output roller 803 has a grooved structure. A certain number of closed-end grooves 803d are distributed around the circumference of the upper output roller 803. The grooves 803d are parallel to the central axis 803a of the upper output roller 803. The area 803c between the grooves remains consistent with the outer diameter of the upper output roller 803.

[0034] The characteristics of the vortex spun segmented colored yarn product can be adjusted by changing the upper roller diameter and groove distribution pattern of the output upper roller 803 to adjust the segmented colored yarn length and distribution pattern.

[0035] The decorative yarn roving feeding assembly 7 and the decorative yarn roving output assembly 8 are both mounted on the upper rocker arm 16 of the vortex spinning frame cradle 15, as shown in FIG. Figure 2As shown, when the upper rocker arm 16 is lifted, the decorative yarn roving feed assembly 7 and the decorative yarn roving output assembly 8 disengage from the rear top rubber roller 6 and the second middle top rubber roller 9, without affecting the operation of the original drafting mechanism of the vortex spinning machine. When the upper rocker arm 16 is depressed, the decorative yarn roving feed assembly 7 and the decorative yarn roving output assembly 8 engage the rear top rubber roller 6 and the second middle top rubber roller 9, respectively. At this point, under the action of the rear top rubber roller 6, the lower feed roller 702 of the decorative yarn roving feed assembly 7 moves along the chute of the feed assembly sub-bracket 707 toward the upper feed roller 703. The upper feed roller 703 transmits its force through the central axis 709 of the upper feed roller to the vertical planar structure 706 of the feed assembly main frame 701. This force is then transmitted to the feed assembly main frame 701 fixed to the upper rocker arm 16 via the folded spring structure C704 and the folded spring structure D705. The compression of the folded spring structure provides pressure between the rollers, meeting the transmission and drafting requirements. Likewise, the force and operation mode of the decorative yarn roving delivery assembly 8 are the same as those of the decorative yarn roving feeding assembly 7 .

[0036] The specific process configuration of the vortex spinning colored yarn spun in this embodiment is as follows: the vortex spinning machine model is MVS VORTEX870EX, the spinning speed is 500m / min, the white polyester fiber strips fed are 18g / 5m in weight, the white polyester fiber specifications are 38mm×1.33dtex, the total drafting multiple is 184, the main zone drafting multiple is 61.3, the back zone drafting multiple is 3.0, the middle zone drafting multiple is 1.0, and the output linear density of the white polyester fiber strips is 19.57tex; the black decorative yarn roving is fed with a weight of 6.0g / 10m, the white polyester fiber specifications are 38mm×1.33dtex, the decorative yarn roving twist is 22.5 twists / m, and the outer diameter of the output rubber roller is 200mm. It is 30mm, and the grooves and protrusions are divided into 12 equal parts in the circumferential direction. The circumferential length of each part is about 7.85mm, so the segment color cycle length of the decorative yarn roving output from the rear zone is 15.7mm. According to the principle, after stretching in the middle zone and the front zone, the final segment color cycle length of the vortex-spun segment color yarn is 965mm. The decorative yarn roving in the present invention is also stretched in three zones, so the total stretching multiple is the same as the fiber strip, which is the same as the vortex spinning machine stretching multiple of 184. The average linear density of the black decorative yarn output fiber strip is 3.26tex, and the average linear density of the spun vortex-spun segment color yarn is 22.83tex.

Claims

1. A spinning device for vortex spinning colored yarn, comprising a vortex spinning machine drafting mechanism, characterized in that: An additional drafting device is installed on the drafting mechanism of the vortex spinning machine, wherein the additional drafting device includes a decorative yarn roving feeding assembly (7) and a decorative yarn roving output assembly (8); The decorative yarn roving feeding assembly (7) comprises a feeding assembly main frame (701), a feeding assembly sub-frame (707), a feeding lower roller (702) and a feeding upper roller (703). The decorative yarn roving feeding assembly (7) adopts a two-spindle mode, and has a symmetrical structure on the left and right. The upper end of the feeding assembly main frame (701) is a horizontal structure, and a folding spring structure C (704) and a folding spring structure D are vertically extended downward at a certain position at the edge and the middle respectively. (705), the folding spring structure further extends vertically downward to form a vertical plane structure A (706), the vertical plane structure A (706) has a closed chute in the middle and a semi-open chute at the bottom; the feeding lower roller (702) and the feeding upper roller (703) are installed in the chute of the feeding component sub-bracket (707), and the side of the feeding component sub-bracket (707) has a cantilever clamping shaft (708), and is installed in the closed chute of the vertical plane structure A (706) belonging to the feeding component main body bracket (701) through the cantilever clamping shaft (708), and at the same time, the feeding upper roller (703) located in the feeding component sub-bracket (707) extends axially from the main body of the feeding upper roller center axis (709) and is clamped in the semi-open chute of the vertical plane structure A (706); The decorative yarn roving output assembly (8) comprises an output assembly main frame (801), an output assembly sub-frame (807), an output lower roller (802) and an output upper roller (803). The decorative yarn roving output assembly (8) adopts a two-spindle mode, with a left-right symmetrical structure. The upper end of the output assembly main frame (801) is a horizontal structure, and a folding spring structure A is vertically extended downward at a certain position at the edge and the middle. (804) and a folding spring structure B (805), the folding spring structure further extends downward to form a vertical plane structure B (806), the vertical plane structure B (806) has a closed chute in the middle and a semi-open chute at the bottom; the output lower roller (802) and the output upper roller (803) are installed in the chute of the output component sub-bracket (807), and the side of the output component sub-bracket (807) has a cantilever clamping shaft B (808), and is installed into the closed chute of the vertical plane structure B (806) belonging to the output component main body bracket (801) through the cantilever clamping shaft B (808), and at the same time, the output upper roller (803) located in the output component sub-bracket (807) extends axially from the main body to the output upper roller center axis (803a) of the main body and is clamped into the semi-open chute of the vertical plane structure B (806); The rubber layer of the output upper roller (803) has a groove structure, and a certain number of output upper roller rubber layer grooves (803d) with both ends closed are distributed circumferentially of the output upper roller (803). The output upper roller rubber layer grooves (803d) are parallel to the output upper roller center axis (803a) of the output upper roller (803), and the area (803c) between the output upper roller rubber layer grooves between the two grooves remains consistent with the outer diameter of the output upper roller (803).

2. A vortex spinning device for colored yarn according to claim 1, characterized in that: The output lower roller (802) and the output upper roller (803) are both two-layer structures, the center of the roller is the rotation axis, the inner layer of the roller is a metal round roller, the outer layer of the roller is a rubber layer, and the output lower roller (802) is a uniform structure.

3. A vortex spinning device for colored yarn according to claim 1 or 2, characterized in that: The feeding lower roller (702) and the feeding upper roller (703) are both two-layer structures, the center of the roller is the rotating shaft, the inner layer of the roller is a metal round roller, and the outer layer of the roller is a rubber layer, and both have a uniform structure.

4. The spinning method of the vortex spinning segment colored yarn spinning device according to any one of claims 1 to 3, characterized in that: Here are the steps: The first step is to feed the basic fiber strip (1) into the drafting mechanism of the vortex spinning machine through the guide sliver bell mouth (3), and evenly draft and output it through the multiple sections of the rear roller (5) and the rear upper glue roller (6), the second middle roller (10) and the second middle upper glue roller (9), the first middle roller (10) and the first middle upper glue roller (12), the front roller (13) and the front upper glue roller (14); feed the decorative yarn roving (2) into the decorative yarn roving feeding assembly (7) from the yarn guide bell mouth (4), and the decorative yarn roving feeding assembly (7) contacts with the rear upper glue roller (6) and has a certain pressure, and the decorative yarn roving feeding assembly (7) is driven by the rear upper glue roller (6) to operate by friction; Step 2: The decorative yarn roving (2) then enters the decorative yarn roving output assembly (8), which contacts the middle second rubber roller (9) and also has a certain pressure. The middle second rubber roller (9) drives the decorative yarn roving output assembly (8) to operate by friction. There is a speed difference between the middle second rubber roller (9) and the rear rubber roller (6) of the vortex spinning machine, so there is also a speed difference between the operating speeds of the decorative yarn roving output assembly (8) and the decorative yarn roving feeding assembly (7), that is, the drafting process of the decorative yarn roving is realized. Step 3: The output upper roller (803) of the decorative yarn roving output assembly (8) is circumferentially distributed with several grooves of designed specifications. The decorative yarn roving (2) will be intermittently gripped when passing through the groove roller, and then subjected to non-uniform drafting. After passing through the device, the decorative yarn roving (2) is fed into the main drafting area of the vortex spinning machine in an uneven form, and merges with the basic fiber strip (1) in the main drafting area. The mixed fiber strip is further drafted and enters the spinning cup (17), and is finally spun into vortex spinning segment colored yarn (18).

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