A constant tension control device and method for textile yarn

Abstract

A device and method for controlling constant tension in textile yarns belongs to the technical field of textile yarn tension control. The invention comprises a bracket, a yarn wheel, a magnet, and a counterweight. The yarn wheel is rotatably connected to the bracket, with a magnet disposed on at least one side of the yarn wheel. An adjustment mechanism is disposed between the magnet and the bracket, which is movable radially along the yarn wheel. The yarn wheel is made of a ferromagnetic material or includes a ferromagnetic portion. The yarn wheel is provided with a winding groove, and the counterweight is used to tighten one end of the yarn. This invention effectively ensures the stability of yarn tension while being simple, easy to implement, and low-cost.

Description

Technical Field

[0001] The present invention relates to the technical field of textile yarn tension control, and in particular to a textile yarn constant tension control device and method. Background Art

[0002] Currently, when textile equipment such as flat knitting machines, hosiery machines, underwear machines, silk winders, and bobbin winders are operating, it is necessary to quantitatively control the tension of each yarn to achieve balanced tension at each spindle. This ensures smoother, more uniform textiles, better quality, and more stable equipment operation.

[0003] Existing yarn tension control solutions mainly use auxiliary motors to feed yarn. During operation, when the yarn tension is detected to be too high, the auxiliary motor accelerates the yarn feeding until the tension gradually reaches the rated value. Conversely, when the tension is too low, the auxiliary motor decelerates the yarn feeding until the tension gradually reaches the rated value. Using this dynamic control method to maintain stable yarn tension has the following disadvantages:

[0004] 1. Complex control methods and high technical requirements: This control technology requires the following equipment: tension monitoring device, motor controller, high-speed motor, system controller, software identification and judgment, structural parts matching, etc.

[0005] 2. High energy consumption: This solution requires separate power supplies for motors and other electronic components. Since each yarn requires a device, each flat knitting machine requires dozens of devices, resulting in huge energy consumption.

[0006] 3. High cost: This solution requires a lot of control hardware configuration, mainly including: tension monitoring device, motor controller, high-speed motor, system controller, electronic components, PCB, wire, connector, injection molded parts, sheet metal parts, etc. The cost of a single device is very high. In addition, each yarn requires a device, and each flat knitting machine requires dozens of devices, which adds up to a huge overall cost.

[0007] 4. Poor yarn tension stability: From the control principle of the equipment, the equipment adjusts the yarn tension by dynamic force monitoring and dynamic adjustment of the motor speed. Based on this principle, the yarn tension will basically fluctuate within a certain range. Since there will be certain errors and delays in monitoring and adjustment, the yarn tension will vary greatly and the tension stability will be poor.

[0008] 5. Poor quality and equipment stability: Due to the multiple hardware configurations of this solution and the complex monitoring, identification and operation functions, the probability of instrument failure increases greatly during long-term operation. Summary of the Invention

[0009] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and to provide a constant tension control device and method for textile yarns, which can effectively ensure the stability of yarn tension and is simple, easy to implement and low in cost.

[0010] The purpose of the present invention is achieved through the following technical solutions:

[0011] A constant tension control device for textile yarns comprises a bracket, a yarn wheel, a magnet, and a counterweight; the yarn wheel is rotatably connected to the bracket, the magnet is provided on at least one side of the yarn wheel, an adjustment mechanism that can move radially along the yarn wheel is provided between the magnet and the bracket, the yarn wheel is made of ferromagnetic material or includes a ferromagnetic part, a winding groove is provided on the yarn wheel, and the counterweight is used to tighten one end of the yarn.

[0012] The present invention mainly utilizes the magnetic attraction of the magnet to the yarn wheel to generate a certain damping on the rotation of the yarn wheel, thereby hindering the rotation of the yarn wheel. The yarn is wound in the winding groove of the yarn wheel. Pulling the yarn will drive the yarn wheel to rotate. Therefore, the damping generated by the magnet on the rotation of the yarn wheel will hinder the yarn from being pulled, even if the yarn generates a certain tension. Therefore, the yarn tension can be adjusted by adjusting the size of the magnet's attraction to the yarn wheel. When adjusting, a counterweight of corresponding specifications is selected according to the required tension, the entire device is placed in a horizontal state with the rotating shaft of the yarn wheel, and the yarn of the spindle is allowed to hang down after it has circled once in the winding groove. Then, the counterweight is hung on the lower end of the yarn, and the distance between the magnet and the yarn wheel is adjusted, that is, the rotation damping of the yarn wheel is adjusted, until the counterweight can be lowered at a uniform speed. At this time, the gravity of the counterweight is the tension of the yarn.

[0013] As a preferred embodiment of the present invention, the adjustment mechanism includes a screw and a knob, the screw being threadedly connected to the bracket, one end of the screw being axially limited and rotationally connected to the magnet, and the other end being provided with the knob, and the magnet being slidably connected to the bracket. The adjustment mechanism rotates the screw by turning the knob, and the screw achieves axial movement through the threaded connection with the bracket, while the magnet is rotationally connected to the screw, that is, the screw does not drive the magnet to rotate, but only drives the magnet to move linearly, thereby adjusting the distance between the magnet and the yarn wheel.

[0014] As a preferred embodiment of the present invention, the magnets are provided on opposite sides of the yarn wheel to ensure the stability of the rotation damping of the yarn wheel generated by the magnets.

[0015] As a preferred embodiment of the present invention, the end of the magnet facing the yarn wheel has an arc-shaped surface adapted to the outer cylindrical surface of the yarn wheel. On the one hand, it can further ensure the stability of the rotational damping of the yarn wheel generated by the magnet; on the other hand, it ensures the stability of the magnet when clamping the yarn wheel.

[0016] As a preferred embodiment of the present invention, a magnetic base is provided at the bottom of the bracket to facilitate the installation and fixation of the entire device.

[0017] As a preferred embodiment of the present invention, the bracket includes a base plate and two end plates respectively provided at both ends of the base plate, the yarn wheel is rotatably connected to the middle portion of the base plate, and the magnet is connected to the end plates via the adjustment mechanism. The bracket has a simple structure and is stable and reliable.

[0018] As a preferred embodiment of the present invention, the magnet cooperates with the main body of the yarn wheel, and the winding groove is opened on the side of the main body away from the bracket on the yarn wheel, that is, the winding groove part will not affect the damping generated by the magnet on the yarn wheel, and the yarn winding operation will not be affected by the magnet being close to the yarn wheel.

[0019] As a preferred embodiment of the present invention, the opening of the winding groove has an introduction structure to facilitate the winding operation.

[0020] As a preferred embodiment of the present invention, the yarn wheel is rotatably connected to the bracket via a wheel shaft and a bearing, ensuring that the yarn wheel can rotate smoothly, thereby ensuring the stability of the rotation damping.

[0021] The present invention also provides a method for controlling constant tension of a textile yarn, using the above-mentioned constant tension control device for a textile yarn, the control method comprising:

[0022] The magnet is pressed and fixed to the yarn wheel by the adjusting mechanism;

[0023] Place the entire control device on its side, with no interference below the winding groove of the yarn wheel;

[0024] The yarn of the spindle is wound around the winding groove for one circle, with the yarn outlet extending downward;

[0025] Select the corresponding specifications of the counterweight according to the needs and hang it on the outlet end of the yarn;

[0026] The distance between the magnet and the yarn wheel is adjusted by the adjustment mechanism until the arrangement descends at a uniform speed.

[0027] The advantages of the present invention are:

[0028] 1. It adopts a simple pure physical structure with low implementation requirements and no need for monitoring equipment and software control equipment;

[0029] 2. Due to the adoption of pure physical structure, no electricity consumption is required, which is more energy-saving and environmentally friendly;

[0030] 3. No complicated electronic equipment or electricity is required, which greatly reduces costs;

[0031] 4. The magnet provides stable damping for the rotation of the yarn wheel, ensuring excellent stability of the yarn tension;

[0032] 5. Simple structure, few components, higher stability of the device and longer service life.

[0033] 6. Yarn tension is set by counterweight for better consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic structural diagram of a constant tension control device for textile yarns according to the present invention;

[0035] Figure 2 This is a side elevational structural diagram of a constant tension control device for textile yarns according to the present invention;

[0036] Figure 3 This is a feasible structure for connecting the screw and the magnet in the present invention. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] like Figure 1-2 As shown, this embodiment provides a constant tension control device for textile yarns, including a bracket, a yarn wheel 2, a magnet 3, and a counterweight 4. The bracket has a simple structure, consisting of only a base plate 11 and two left and right end plates 12. The yarn wheel 2 is rotatably connected to the middle of the base plate 11 through an axle 5 and a bearing 6. A magnet 3 is slid on the left and right sides of the yarn wheel 2 on the base plate 11, and an adjustment mechanism is provided between each magnet and the end plate on that side. The adjustment mechanism includes a screw 71 and a knob 72. The screw 71 is threadedly connected to the end plate 12, and one end of the screw 71 is axially limited and rotatably connected to the magnet 3, while the other end is fixed with the knob 72. Specifically, a screw 71 such as Figure 3The limiting cover 81 is shown, and a matching limiting block 82 is fixedly provided at the end of the screw rod 71 to achieve synchronous movement of the two along the axial direction of the screw rod 71 and relative rotation. During assembly, the screw rod 71 can be first threadedly connected to the end plate 12, and then the end is passed through the limiting cover 81. Then, the limiting block 82 is installed on the end of the screw rod 71 by means of threaded connection, and finally, the limiting cover 81 is fixed to the magnet 3 by means of screws. The yarn wheel 2 needs to cooperate with the magnetic force of the magnet 3, so it is made of ferromagnetic material, such as iron; or it includes a ferromagnetic part, such as an iron interior and an outer shell. The yarn wheel 2 is also provided with a winding groove 21, in which the yarn 9 is wound. When the yarn 9 is pulled, the yarn wheel 2 is driven to rotate, and the magnetic attraction of the magnet 3 to the yarn wheel 2 hinders the rotation of the yarn wheel 2, that is, it generates damping on the rotation of the yarn wheel. The damping makes the yarn wheel 2 hinder the yarn 9 from being pulled, thereby generating a certain tension in the yarn 9. Moreover, the distance between the magnet 3 and the yarn wheel 2 can be adjusted to change the damping effect of the magnet 3 on the rotation of the yarn wheel, thereby adjusting the yarn tension. The tension is adjusted by the counterweight 4, which can be a standard weight. When adjusting, select a weight of corresponding specifications according to the required tension, place the entire device with the axle 5 of the yarn wheel 2 in a horizontal state, and make the yarn 9 of the spindle hang down after winding around the winding groove once, then hang the weight on the lower end of the yarn, adjust the distance between the magnet 3 and the yarn wheel 2, that is, adjust the rotation damping of the yarn wheel 2, until the weight can drop at a uniform speed. At this time, the gravity of the weight is the tension of the yarn.

[0039] Specifically, the magnet 3 is aligned with the main body of the yarn wheel 2, i.e., the height of the magnet 3 is comparable to that of the main body of the yarn wheel 2. The yarn wheel 2 is provided with a winding groove 21 on a side of the main body away from the bottom plate 11. This means that the winding groove does not affect the damping effect of the magnet on the yarn wheel, and the yarn winding operation is not affected by the magnet being close to the yarn wheel. Furthermore, the opening of the winding groove 21 has an inner narrow and outer wide lead-in structure to facilitate the winding operation.

[0040] like Figure 2 As shown, the end of the magnet 3 facing the yarn wheel 2 has an arcuate surface adapted to the outer circumferential surface of the yarn wheel 2, which can further ensure the stability of the magnet's damping force on the yarn wheel on the one hand; on the other hand, it ensures the stability of the magnet when clamping the yarn wheel.

[0041] In addition, in order to facilitate the installation of the entire device on equipment such as a textile machine, a magnetic base 10 is provided at the bottom of the base plate 11.

[0042] This embodiment further provides a method for controlling constant tension of a textile yarn, using the above-mentioned constant tension control device for a textile yarn, the control method comprising:

[0043] S1. Turn the knobs 72 on both sides so that the left and right magnets 3 press and fix the yarn wheel 2 so that it cannot rotate, facilitating subsequent operations.

[0044] S2. Place the entire control device sideways at the edge of a textile machine or other equipment, so that the axle 5 of the yarn wheel 2 is horizontal and the winding groove 21 is outside the textile machine or other equipment, that is, there is no interference below the winding groove 21;

[0045] S3, the yarn 9 of the spindle is wound around the winding groove 21 for a circle, for example, along Figure 2 The wires are wound in the order of abcd, and the final wire end extends downwards;

[0046] S4. Select a weight of appropriate specifications according to the needs, hang it on the lower end of the yarn 9, and ensure that the yarn 9 is tightened in and out and will not loosen;

[0047] S5. Turn the knobs 72 on both sides to gradually loosen the left and right magnets 3 and move them away from the yarn wheel 2. As the magnets 3 on both sides move away from the yarn wheel 2, the damping of the yarn wheel 2 decreases, and the weights pull the yarn 9 downward, causing the yarn wheel 2 to rotate accordingly. Fine-tune the knobs 72 on both sides until the weights drop at a uniform speed. At this point, the tension of the yarn 9 is equal to the gravity of the weights, and the tension adjustment is complete.

[0048] S6. Remove the weights on the yarn 9 and install the entire device at an appropriate location on a textile machine or other equipment through the magnetic base 10. Then connect the outlet end of the yarn 9 to the textile machine or other equipment. After adjusting the inlet and outlet yarns, the device installation is completed.

[0049] S7. Start the textile machine or other equipment, the yarn drives the yarn wheel to rotate, and the constant damping generated by the magnet on the yarn wheel makes the yarn have a constant tension.

[0050] The above is merely a preferred embodiment of the present invention, which is one implementation method based on the overall concept of the present invention. The scope of protection of the present invention is not limited to this embodiment. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A method for controlling constant tension of textile yarn, characterized in that: A constant tension control device for textile yarn is used, the control device comprising a bracket, a yarn wheel, a magnet, and a counterweight; the yarn wheel is rotatably connected to the bracket, the magnet is provided on at least one side of the yarn wheel, an adjustment mechanism is provided between the magnet and the bracket that can move radially along the yarn wheel, the yarn wheel is made of ferromagnetic material or includes a ferromagnetic portion, the yarn wheel is provided with a winding groove, and the counterweight is used to tighten one end of the yarn; The control method includes: The magnet is pressed and fixed to the yarn wheel by the adjusting mechanism; Place the entire control device on its side, with no interference below the winding groove of the yarn wheel; The yarn of the spindle is wound around the winding groove for one circle, with the yarn outlet extending downward; Select the corresponding specifications of the counterweight according to the needs and hang it on the outlet end of the yarn; The distance between the magnet and the yarn wheel is adjusted by the adjustment mechanism until the counterweight descends at a uniform speed.

2. A method for controlling constant tension of textile yarn according to claim 1, characterized in that: The adjustment mechanism includes a screw and a knob. The screw is threadedly connected to the bracket. One end of the screw is axially limited and rotationally connected to the magnet, and the other end is provided with the knob. The magnet is slidably connected to the bracket.

3. A method for controlling constant tension of textile yarn according to claim 1, characterized in that: The magnets are arranged on opposite sides of the yarn wheel.

4. A method for controlling constant tension of textile yarn according to claim 1, characterized in that: One end of the magnet facing the yarn wheel has an arc-shaped surface adapted to the outer circumferential surface of the yarn wheel.

5. A method for controlling constant tension of textile yarn according to claim 1, characterized in that: A magnetic base is provided at the bottom of the bracket.

6. A method for controlling constant tension of textile yarn according to claim 1, characterized in that: The bracket includes a bottom plate and two end plates respectively arranged at both ends of the bottom plate. The yarn wheel is rotatably connected to the middle of the bottom plate, and the magnet is connected to the end plates through the adjustment mechanism.

7. A method for controlling constant tension of textile yarn according to claim 1, characterized in that: The magnet is matched with the main body of the yarn wheel, and the yarn wheel is provided with the winding groove on a side of the main body away from the bracket.

8. A method for controlling constant tension of textile yarn according to claim 1, characterized in that: The opening of the winding groove has a lead-in structure.

9. A method for controlling constant tension of textile yarn according to claim 1, characterized in that: The yarn wheel is rotatably connected to the bracket through a wheel shaft and a bearing.

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