Apparatus for and method of plying yarns

Abstract

The application provides a device for plying yarns and a plying method thereof, comprising a yarn supply unit, a disentangling unit and a plying machine. The yarn supply unit comprises a plurality of erected yarn bobbins, the disentangling unit comprises a plurality of disentangling rollers, and the plying machine is provided with a guide assembly at the bottom end of the rotating shaft. By arranging the plurality of erected yarn bobbins of the yarn supply unit and the plurality of corresponding disentangling rollers of the disentangling unit, the uneven tension problem in the yarn disentangling process can be effectively improved, and each yarn can be ensured to be in a stable state when entering the plying stage, thereby improving the quality basis of the plied yarn. The entry end of the adjusting frame in the plying machine is provided with a bunching ring to preliminarily regulate the yarn, the first tension rod at the top end and the plurality of second tension rods arranged at intervals below cooperate with the guide wheel at the tail end, so that the arrangement ratio density of the plied yarn during the forming and winding can be controlled by changing the passing path of the yarn at each tension rod, and different threading modes can be selected according to different yarns.

Description

Technical Field

[0001] This invention relates to the field of yarn plying technology, and in particular to an apparatus and method for unwinding and plying yarn. Background Technology

[0002] In the yarn processing sector of the textile industry, the production of ply yarn is a crucial step, as its quality directly impacts the performance and quality of subsequent textile products. With the continuous development of textile technology and the increasing market demand for high-quality yarn products, the performance requirements for ply yarn production equipment are also becoming increasingly stringent.

[0003] Traditional yarn plying devices have several limitations in structure and function. Firstly, in the yarn unwinding stage, the yarn is typically released directly from the yarn bobbin, resulting in uneven tension during unwinding. This uneven tension causes the yarn to be unstable when entering the plying stage, thus affecting the quality of the plyed yarn. Secondly, existing devices often lack effective yarn arrangement and guiding structures during the plying process. They typically simply gather the yarn together for plying, failing to precisely control the yarn arrangement and winding density. This results in inconsistent yarn density during plying, with some areas being too dense and others relatively loose. This uneven density severely affects the appearance and internal quality of the plyed yarn.

[0004] Furthermore, traditional equipment has poor compatibility with yarns of different specifications and materials. When faced with diverse production needs, it requires frequent equipment changes or complex adjustments, which not only increases production and time costs but also makes it susceptible to human error affecting product quality stability.

[0005] In summary, in order to meet the modern textile industry's demand for high-quality ply yarn and improve production efficiency and product quality stability, there is an urgent need for a new type of yarn unwinding and ply yarn forming device that can overcome the above-mentioned defects. By optimizing each link in the yarn supply, unwinding, and plying process, reliable control of the ply yarn forming and winding density can be achieved, thereby improving the level and efficiency of the entire yarn plying production process. Summary of the Invention

[0006] The purpose of this invention is to provide an apparatus and a method for unwinding and plying yarn, which can achieve stable plying of yarn and adjust the plying density of the yarn wound on the roller.

[0007] This invention provides an apparatus for unwinding and forming plied yarn, comprising a yarn supply unit, an unwinding unit, and a pliing machine. The yarn supply unit includes multiple mounted yarn bobbins, and the unwinding unit includes multiple unwinding rollers, each corresponding to one yarn. A roller is mounted on the rotating shaft of the pliing machine, and a yarn guide is provided on one side of the rotating shaft. A guide assembly is provided at the bottom end of the rotating shaft of the pliing machine. The guide assembly includes an adjusting frame, a bundle ring at the inlet end of the adjusting frame, a first tension bar at the top end of the adjusting frame, and multiple second tension bars spaced apart along the length of the adjusting frame below the first tension bar. A guide wheel is provided at the end of the adjusting frame.

[0008] Furthermore, the yarn supply unit includes a movable yarn rack on which multiple yarn bobbins are rotatably mounted, and the front end of the yarn rack is provided with multiple guide rods corresponding to different yarns.

[0009] Furthermore, the unwinding unit includes a roller bracket, and a plurality of unwinding rollers are rotatably mounted on the roller bracket via bearings. Each unwinding roller has a spiral groove on its surface, and a first motor for driving the unwinding rollers to rotate is fixedly mounted on the roller bracket.

[0010] Furthermore, a twisting mechanism is provided between the stranding machine and the unwinding unit. The twisting mechanism is located between the stranding machine and the unwinding unit. The twisting mechanism includes a twisting wheel and a second motor for driving the twisting wheel to rotate. The twisting wheel has a plurality of threading holes evenly spaced along the circumference.

[0011] Furthermore, the outer side of the twisting wheel is provided with meshing teeth, and a gear that meshes with the meshing teeth is fixedly installed on the output shaft of the second motor.

[0012] Furthermore, a slide rail is provided on the side of the stranding machine near the unwinding unit, a sliding seat is slidably mounted on the slide rail, and the twisting mechanism is fixedly mounted on the top of the sliding seat.

[0013] Furthermore, it also includes a tension control unit for controlling the tension of the yarn during the unwinding process. The tension control unit includes a tension sensor, a controller, and a tension regulator. The tension sensor is installed on the yarn path between the unwinding roller and the plying machine. The controller is electrically connected to the tension sensor and the tension regulator.

[0014] Furthermore, the tension regulator is a magnetic damper or a pneumatic damper.

[0015] A method for forming a ply yarn by unwinding and rewinding yarn, based on the aforementioned apparatus for forming a ply yarn, includes the following steps:

[0016] S1: Install the yarn spools with the yarn to be unwound onto the yarn rack of the yarn supply unit;

[0017] S2: After the yarn is wound onto the unwinding roller of the unwinding unit, it is introduced into the twisting machine;

[0018] S3: After being twisted, the yarn passes through the guide assembly, then through the actuator of the yarn feeder, and is wound onto the roller.

[0019] Furthermore, before the yarn is introduced into the twisting machine, multiple yarns are threaded at equal intervals through the threading holes of the twisting wheel.

[0020] The beneficial effects of this technical solution are as follows: By setting multiple yarn bobbins in the yarn supply unit and multiple corresponding unwinding rollers in the unwinding unit, the problem of uneven tension during the yarn unwinding process can be effectively improved, ensuring that each yarn is in a stable state when entering the plying stage, thus improving the quality of the plyed yarn. The bundle ring at the inlet end of the adjusting frame in the plying machine can initially straighten the yarn. The first tension bar at the top and multiple second tension bars spaced apart below, in conjunction with the guide wheel at the end, can control the plying density during the forming and winding of the plyed yarn by changing the yarn's path on each tension bar. Different threading methods can be selected for different yarns. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the structure of the guide component in this invention.

[0024] Figure 3 This is a schematic diagram of the yarn supply unit in this invention.

[0025] Figure 4 This is a schematic diagram of the decomposition unit in this invention.

[0026] Figure 5 This is a schematic diagram of the twisting mechanism in this invention.

[0027] Explanation of reference numerals in the attached drawings: 1-Yarn supply unit, 101-Yarn bobbin, 102-Guide rod, 2-Unwinding unit, 201-Unwinding roller, 202-First motor, 203-Pulley, 204-Synchronous belt, 3-Twisting machine, 301-Thread guide, 4-Twisting mechanism, 401-Slide rail, 402-Sliding seat, 5-Guide assembly, 501-Adjusting frame, 502-First tension bar, 503-Second tension bar, 504-Buckle ring, 505-Guide wheel, 506-First strip hole, 507-Second strip hole, 508-Fasting screw, 6-Roller, 7-Twisting wheel, 701-Threading hole, 702-Interlocking tooth, 703-Flange, 8-Second motor, 9-Mounting frame, 901-Roller, 10-Gear. Detailed Implementation

[0028] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. 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.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] Example 1

[0032] like Figures 1-5 As shown, the present invention provides an apparatus for unwinding and plying yarn, comprising a yarn supply unit 1, an unwinding unit 2, and a plying machine 3. The yarn supply unit 1 includes a movable yarn frame, on which multiple yarn bobbins 101 are rotatably mounted. The front end of the yarn frame is provided with multiple guide rods 102 corresponding to different yarns, which are used to guide the yarn out. The bottom end of the yarn frame is provided with casters for movement of the entire yarn frame.

[0033] The unwinding unit 2 includes a roller bracket and multiple unwinding rollers 201, each corresponding to a yarn. The multiple unwinding rollers 201 are rotatably mounted on the roller bracket via bearings. Each unwinding roller 201 has a spiral groove on its surface, which can pull out the yarn. A first motor 202 for driving the rotation of the unwinding rollers 201 is fixedly mounted on the roller bracket. The first motor 202 drives the unwinding rollers 201 to rotate. Two unwinding rollers 201 arranged coaxially on the roller bracket are fixedly connected, and a pulley 203 is installed at the connection. Multiple pairs of unwinding rollers 201 are evenly spaced along the height direction of the roller bracket. A pulley 203 is also installed on the drive shaft of the first motor 202. A synchronous belt 204 is installed to drive the pulleys 203 on the multiple unwinding rollers 201 to rotate, thereby driving the unwinding rollers 201 to rotate synchronously. In this embodiment, the synchronous belt 204 is an annular transmission belt with equidistant teeth, and the outer circumference of the pulleys 203 that cooperate with it is also machined with corresponding teeth. During transmission, the teeth of the synchronous belt 204 and the teeth of the multiple pulleys 203 mesh with each other. In order to keep the synchronous belt 204 always meshing with the multiple pulleys 203, a corresponding tensioning component can be set on the roller bracket to maintain the tension of the synchronous belt 204. The tensioning component is existing technology and will not be described in detail here. The specific component can be selected according to the actual situation.

[0034] The stranding machine 3 includes a stranding machine 3, on which a roller 6 is mounted. A wire guide 301 is provided on one side of the stranding machine 3's rotating shaft. A guide assembly 5 is provided at the bottom end of the stranding machine 3's rotating shaft. The guide assembly 5 includes an adjusting frame 501. A bundle ring 504 is provided at the inlet end of the adjusting frame 501. A first tension bar 502 is provided at the top end of the adjusting frame 501. A first strip-shaped hole 506 is opened along the length direction on the side of the adjusting frame 501. Multiple second tension bars 503 are spaced apart in the first strip-shaped hole 506. A guide wheel 505 is provided at the end of the adjusting frame 501. A second strip-shaped hole 507 can be opened at the top end of the adjusting frame 501 to facilitate the adjustment of the position of the second tension bars 503 and their fixation at the second strip-shaped hole 507 by fastening screws 508. By setting the first tension bar 502 and multiple second tension bars 503, the spacing of the second tension bars 503 and the number of tension bars used can be adjusted according to different winding density requirements. The reason is that the way the yarn is wound around the tension bar affects the tightness of the yarn formation. If the yarn is wound more times on the tension bar, the friction between the yarn and the tension bar will increase significantly during unwinding. This greater friction will increase the tension on the yarn during the subsequent forming process, thus making the yarn formation more compact. Conversely, fewer windings result in less friction and relatively lower tension on the yarn, potentially leading to a lower final density.

[0035] It also includes a tension control unit for controlling the tension of the yarn during the unwinding process. The tension control unit includes a tension sensor, a controller, and a tension regulator. The tension sensor is installed on the yarn path between the unwinding roller 201 and the plying machine 3 to monitor the yarn tension in real time. The controller is electrically connected to the tension sensor and the tension regulator. In this embodiment, the tension regulator is a magnetic damper or a pneumatic damper. The tension regulator adjusts the yarn tension according to the instructions of the controller.

[0036] Example 2

[0037] The difference between this embodiment and embodiment 1 is that the twisting machine 3 also includes a twisting mechanism 4, which is located between the twisting machine 3 and the unwinding unit 2. The twisting mechanism 4 includes a twisting wheel 7 and a second motor 8 for driving the twisting wheel 7 to rotate. The twisting wheel 7 has a plurality of threading holes 701 evenly spaced along the circumference. The outer side of the twisting wheel 7 is provided with meshing teeth 702. The output shaft of the second motor 8 is fixedly mounted with a gear 10 that meshes with the meshing teeth 702. The twisting mechanism 4 can be selected as needed. Correspondingly, in order to remove the twisting mechanism 4 from the yarn path when not in use, a slide rail 401 is provided on the side of the plying machine 3 near the unwinding unit 2. A sliding seat 402 is slidably mounted on the slide rail 401. The twisting mechanism 4 is fixedly mounted on the top of the sliding seat 402. A mounting frame 9 is provided on the top of the sliding seat 402. A roller 901 is rotatably mounted on the mounting frame 9. The two sides of the twisting wheel 7 are provided with annular flanges 703. The roller 901 on the mounting frame 9 abuts against the outer side of the annular flanges 703 to provide rotational support for the twisting wheel 7.

[0038] This solution also provides a method for plying yarn by unwinding and winding yarn, based on a device for unwinding and winding yarn to form ply yarn, including the following steps: First, yarn spools 101 with the yarn to be unwound are respectively installed on the yarn rack of the yarn supply unit 1; then, the yarn is wound onto the unwinding roller 201 of the unwinding unit 2 and introduced into the plying machine 3; after the yarn is drawn out by the unwinding roller 201, it needs to be tensioned by the tension adjustment unit. The target linear density, twist, strength and other parameters of the ply yarn are input into the controller of the tension adjustment unit, and the controller calculates the initial tension setting value of each yarn during the unwinding process according to a preset algorithm; the range of the initial tension setting value is the yarn breaking strength. The tension sensor is set to monitor the yarn tension in real time during the unwinding process. The tension sensor transmits the tension data to the controller. When the monitored tension value exceeds the set threshold, the controller sends a command to the tension regulator. The tension regulator dynamically adjusts the yarn tension by changing the damping magnitude, adjusting the rotation speed of the unwinding roller 201, or other suitable methods to keep the tension value within the set range. Then, multiple yarns can be twisted as needed. Before the yarns are introduced into the twisting machine 3, multiple yarns are threaded at equal intervals through the threading holes 701 of the twisting wheel 7. Finally, the twisted yarn passes through the guide assembly 5, then through the actuator of the yarn guide 301, and is wound onto the roller 6.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An apparatus for unwinding yarn to form a ply yarn, characterized in that, The device includes a yarn supply unit, an unwinding unit, and a plying machine. The yarn supply unit includes multiple mounted yarn bobbins, and the unwinding unit includes multiple unwinding rollers, each corresponding to one yarn. A roller is mounted on the rotating shaft of the plying machine, and a yarn guide is provided on one side of the rotating shaft. A guide assembly is provided at the bottom end of the rotating shaft, and the guide assembly includes an adjusting frame. A bundle ring is provided at the inlet end of the adjusting frame, a first tension bar is provided at the top end of the adjusting frame, and multiple second tension bars are spaced apart along the length of the adjusting frame below the first tension bar. A guide wheel is provided at the end of the adjusting frame. The unwinding unit includes a roller bracket, and a plurality of unwinding rollers are rotatably mounted on the roller bracket via bearings. Each unwinding roller has a spiral groove on its surface. A first motor for driving the unwinding rollers to rotate is fixedly mounted on the roller bracket. The side of the adjustment frame has a first strip-shaped hole along its length. Multiple adjustable tension bars are arranged in the first strip-shaped hole along the length of the adjustment frame. The top of the adjustment frame has a second strip-shaped hole. The second tension bars are installed in the second strip-shaped hole in an adjustable manner by fastening screws. A twisting mechanism is also provided between the stranding machine and the unwinding unit. The twisting mechanism includes a twisting wheel and a second motor for driving the twisting wheel to rotate. The twisting wheel has a plurality of threading holes evenly spaced along the circumference.

2. The apparatus for unwinding and forming ply yarn according to claim 1, characterized in that, The yarn supply unit includes a movable yarn frame on which multiple yarn bobbins are rotatably mounted. The front end of the yarn frame is provided with multiple guide rods corresponding to different yarns.

3. The apparatus for unwinding and forming ply yarn according to claim 1, characterized in that, The outer side of the twisting wheel is provided with meshing teeth, and a gear that meshes with the meshing teeth is fixedly installed on the output shaft of the second motor.

4. The apparatus for unwinding and forming ply yarn according to claim 1, characterized in that, The stranding machine is provided with a slide rail on the side near the unwinding unit, and a sliding seat is slidably mounted on the slide rail. The twisting mechanism is fixedly mounted on the top of the sliding seat.

5. The apparatus for unwinding and forming ply yarn according to claim 1, characterized in that, It also includes a tension control unit for controlling the tension of the yarn during the unwinding process. The tension control unit includes a tension sensor, a controller, and a tension regulator. The tension sensor is installed on the yarn path between the unwinding roller and the plying machine. The controller is electrically connected to the tension sensor and the tension regulator.

6. The apparatus for unwinding and forming ply yarn according to claim 5, characterized in that, The tension regulator is a magnetic damper or a pneumatic damper.

7. A method for unwinding and plying yarn, implemented based on the apparatus for unwinding and plying yarn as described in any one of claims 1-6, characterized in that, Includes the following steps: S1: Install the yarn spools with the yarn to be unwound onto the yarn rack of the yarn supply unit; S2: After the yarn is wound onto the unwinding roller of the unwinding unit, it is introduced into the twisting machine; S3: After being twisted, the yarn passes through the guide assembly, then through the actuator of the yarn feeder, and is wound onto the roller.

8. The method for unwinding and plying yarn according to claim 7, characterized in that, Before the yarn is introduced into the twisting machine, multiple yarns are threaded at equal intervals through the threading holes of the twisting wheel.

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