A spinning method and false twisting device for adaptively controlling yarn structure

Abstract

The present invention relates to a spinning method and a false twist device for adaptively regulating yarn structure, belonging to the technical field of spinning processing, mainly using an electromechanical device to drive a rotating device to run at high speed, a tension device to adjust contact behavior and constrain yarn movement by its own weight, and when spinning, the yarn passes through the gap between the rotating device and the tension device, and the lateral friction force generated by the high-speed rotation of the rotating device regulates the fiber arrangement structure, and at the same time heats the yarn, reduces the fiber modulus, and fully transfers the fiber. The false twist device has a simple and reasonable structure and high production efficiency, so that the spun yarn has the advantages of soft hand feel, improved strength, significantly reduced hairiness, and stable yarn evenness.

Description

Technical Field

[0001] The invention relates to the technical field of textile processing, and in particular to a spinning method and a false twisting device for adaptively regulating yarn structure. Background Art

[0002] The spinning process is an important link in the entire spinning process. The quality of the yarn produced in this link directly affects the subsequent weaving efficiency and the quality of the finished product. The yarn obtained by traditional ring yarn technology is currently regarded as the most important yarn production technology because of its high strength, uniform yarn dryness and good feel. However, an important defect of traditional ring yarn is that the residual torque of the obtained spun yarn is large as the twisting action proceeds, which seriously affects the performance of the final fabric. The application of false twist device can obtain low-torque ring single yarn, which has a significant effect on achieving low-twist and high-strength yarn. Over the years, researchers have developed a variety of torque-balanced false twist devices to reduce or eliminate the residual torque of the yarn. For example, the Chinese patent publication number CN207973846U, the publication date is 2018.10.16, the invention name is a single-spindle mechanical rotary ring spinning false twist device and spinning frame, including a rotating member, a bearing and a false twist chamber, the rotating member is provided with an axial hole, the bearing is embedded in the axial hole, the false twist chamber is fixed in the bearing, the false twist chamber includes a false twist chamber and a false twist through hole arranged in the false twist chamber, the top and bottom ends of the false twist through hole are both arranged in a trumpet shape, and it also includes a yarn guide hook, the yarn guide hook is fixed on the rotating member, and the hook hole of the yarn guide hook is opposite to the top of the false twist through hole. The false twist device has high production efficiency, low energy consumption, and good softness of the obtained yarn, but the false twist device has a complex structure, and is provided with a special drive mechanism and control system to drive and control the movement of the false twist element. This will make the investment and operation costs higher, and therefore, it is not suitable for industrial application. Chinese patent publication number CN110616480A, publication date 2019.12.27, invention name is a false twist focusing spinning device with a rotary disc structure, the false twist device of the disc rotary structure provided by the patent is located on the output side of the front roller and the feeding side of the lead-out roller, and the false twist device is provided with a yarn guide, which is arranged on the front side, or the rear side, or the front and rear sides of the false twist point on the spinning channel through which the fiber whiskers pass. Although the yarn guide has a restriction on the spinning channel space and can suppress the divergence of the boundary fibers of the fiber whiskers, it will cause additional friction and collision between the fiber whiskers and the yarn guide during the spinning process, thereby causing the yarn dryness to deteriorate. The Chinese patent publication number is CN102839453B, and the publication date is 2017.04.05. The invention name is a single-spindle driven wheel disk false twist spinning device. The invention adopts a rotating wheel disk as a false twist element. The outer periphery of the rotating wheel disk friction drives the yarn to rotate to produce false twist. It is characterized in that at least one false twist wheel disk is arranged downstream of the front roller jaws, the outer periphery of a wheel disk is in pressure contact with the front upper roller or the front lower roller, and the surface friction of the front upper roller or the front lower roller drives the wheel disk to rotate. There is an angle α between the axis of the wheel disk and the axis of the roller, and the yarn output from the front roller jaws has a false twist contact section with at least one outer periphery of the wheel disk.The multi-disc combination method increases the false twist contact section of the yarn and the use of a disc with a spiral groove in the contact section with the yarn increases the friction driving force of the disc on the tangential direction of the yarn, and eliminates or reduces the unfavorable sliding friction between the yarn and the disc, which can make the structure of the fiber in the yarn change favorably, and is very beneficial to improving the false twist structure and the quality and performance of the yarn. However, when the front roller friction drives the disc to rotate, the synthetic material on the outer periphery of the disc will cause material loss due to friction during long-term use. The material loss will make the front roller drive the disc unable to rotate normally, which not only leads to increased power and reduced production capacity, but also seriously affects the spinning quality. Chinese Patent Publication No. CN104278369B, Publication Date 2016.09.07, Invention Name Single-spindle Disc Ring Spinning False Twist Device and Process Method, which includes installing a rotating disc false twist device and a separator rod on a ring spinning frame. A rotating disc is used to form two twisting points to false-twist the spinning segment output by the front roller, and a dividing rod is installed between the two false twisting points so that the fiber bundle is tightly combined with the upper and lower edges of the spinning false twisting disc, thereby separating the two false twisting points and increasing the pressure between the spinning segment and the disc. Although this invention can reduce the size of the spinning twisting triangle and increase the twist of the yarn in the spinning triangle, thereby increasing the strength of the fiber bundle in the spinning twisting triangle, the addition of the dividing rod and the spatial position between the dividing rod and the original spinning segment, and the depth parameters of the dividing rod pressing down the spinning segment are difficult to control, which will inevitably lead to uneven pressure between the spinning segment and the disc, increased spinning tension, and easy end breakage.

[0003] The above-mentioned false twist devices only work on the torque balance of the yarn, and none of them can significantly reduce the hairiness. In view of this, the present invention uses a rotating device and a tension device to perform false twist on the yarn in the spinning section. The rotating device relies on the lateral friction force generated by high-speed rotation to apply bidirectional false twist to the yarn, and the rotating table of the rotating device is an electrically heated ceramic sheet. While applying false twist, it can also reduce the fiber modulus, so that the fiber can be fully transferred, and it plays a role in heating and fixing the twist; the tension device is used to constrain the fiber, so that the fiber is gathered, and the yarn hairiness is reduced. It can be adaptively adjusted according to the yarn count and the movement state. In addition, the rotation speed of the rotating device can be adjusted to control the false twist efficiency of the spinning section, so as to achieve the purpose of reducing spinning ends and improving yarn performance. Summary of the invention

[0004] In view of the deficiencies in the prior art, an embodiment of the present invention provides a spinning method and a false twisting device for adaptively controlling yarn structure, which can effectively improve the quality of the yarn, significantly reduce the yarn hairiness and stabilize the yarn evenness.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A spinning method for adaptively controlling yarn structure, the spinning method comprising the following steps:

[0007] S1, after the roving is drafted by the drafting mechanism, the yarn is output from the front jaw formed by the front roller and the front leather roller;

[0008] S2. During the output process of the yarn from the front jaw, the arrangement structure of the fibers is regulated by the lateral friction force, and the fibers are constrained by the vertical load; in addition, the yarn is heated;

[0009] S3. The yarn processed in the above step S2 is wound on the spindle via the yarn guide hook and the wire ring.

[0010] At the same time, the present invention also provides a false twisting device for realizing the spinning method of the above-mentioned adaptively controlling the yarn structure, wherein the false twisting device is arranged at the front jaw, and is characterized in that the false twisting device comprises:

[0011] A rotating device, the rotating device comprising a rotating disk, a rotating shaft and a rotating table, the rotating table is fixedly mounted on the rotating disk, the rotating disk is fixedly connected to the rotating shaft, wherein the rotating table is composed of an electrically heated ceramic sheet;

[0012] A tension device, the tension device comprising a tension disk, a tension table and a fixed shaft, the tension table is fixedly mounted on the tension disk, the tension disk is connected to the fixed shaft, wherein the tension disk is arranged directly above the rotating disk;

[0013] A motor device, the motor device is connected to the rotating device and is used to drive the rotating device to rotate horizontally, wherein the rotating device and the tension device are fixedly mounted on the motor device;

[0014] and a connecting device, which is connected to the motor device and is used to adjust the position distribution of the motor device, wherein the yarn passes through the gap between the tension disk and the rotating disk.

[0015] Furthermore, the tensioning platform and the fixed shaft are connected in a horizontal rotational direction.

[0016] Furthermore, the motor device includes a motor, a motor box and a motor shaft, the motor is installed in the motor box, one end of the motor shaft is connected to the motor, and the other end thereof is fixedly connected to the rotating shaft.

[0017] Furthermore, the connecting device includes a connecting rod, a connecting bracket and a connecting seat, the connecting rod is fixedly connected to the motor box, and the connecting seat is connected to the connecting rod through the connecting bracket, wherein the connecting bracket can be adjusted and moved vertically and forward and backward along the connecting seat.

[0018] Furthermore, the heating temperature of the yarn by the electric heating ceramic sheet is 100°C-260°C.

[0019] The beneficial effects brought about by the technical solution provided by the embodiment of the present invention are:

[0020] 1) The present invention applies bidirectional false twist to the yarn through the rotating device, and the contact point increases the fiber transfer upward, which is used to gather the width of the fiber whiskers in the twisting triangle area and compress the peripheral fibers to transfer to the inside of the whiskers; the contact point untwists the fibers downward, which is used to increase the fiber straightening parallelism and balance the yarn torque.

[0021] 2) According to the present invention, low-count yarns have more fibers, and the tension device is fixed, which does not rotate when in contact with the rotating device, thereby improving the lateral rubbing force of the rotating disk, shortening the spinning triangle to a great extent, and increasing the tension difference between the central fiber and the peripheral fiber of the yarn. The morphology and arrangement distribution of the fibers in the single yarn are changed, resulting in significant changes in the yarn structure, a tighter structure between fibers, and increased fiber cohesion. High-count yarns have fewer fibers, and the tension device is passively rotating, which rotates when in contact with the rotating device, thereby reducing the deterioration of the yarn evenness and reducing yarn breakage.

[0022] 3) In the present invention, the rotating table of the rotating device is an electrically heated ceramic sheet. When the rotating device rotates at high speed, it relies on friction to apply false twist to the yarn and can also reduce the fiber modulus, so that the fibers are fully transferred and the fibers inside the yarn are arranged tightly, thereby improving the strength utilization rate and yarn strength of the yarn, and also playing a role in heating and fixing the twist. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of spinning with a false twist device for adaptively regulating yarn structure provided by an embodiment of the present invention.

[0024] Figure 2 It is a structural schematic diagram of a false twist device for adaptively regulating yarn structure provided by an embodiment of the present invention.

[0025] In the figure: 1-rotating device, 11-rotating disk, 12-rotating table, 13-rotating shaft, 2-tension device, 21-tension disk, 22-tension table, 23-fixed shaft, 3-motor device, 31-motor, 32-motor box, 33-motor shaft, 4-connecting device, 41-connecting rod, 42-connecting bracket, 43-connecting seat, 5-front leather roller, 6-front roller, 7-yarn guide hook, 8-yarn, 9-spindle. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0027] Please refer to Figure 1 and Figure 2 An embodiment of the present invention provides a false twisting device for adaptively controlling yarn structure, including a rotating device 1, a tension device 2, an electromechanical device 3, and a connecting device 4.

[0028] The rotating device 1 is connected to the rotating shaft 13 through one end of the motor shaft 33 and is fixed on the upper surface of the motor box 32. The rotating table 12 of the rotating device 1 is located on the upper surface of the rotating disk 11, and the rotating table 12 is an electric heating ceramic sheet with the same outer diameter as the outer diameter of the rotating disk 11.

[0029] The tension device 2 is connected to the upper surface of the motor box 32 through a fixed shaft 23. The fixed shaft 23 of the tension device 2 is U-shaped with unequal lengths on both sides. The tension disk 21 of the tension device 2 is connected to the shorter side of the fixed shaft 23, and the longer side is vertically fixed to the upper surface of the motor box 32. The tension table 22 of the tension device 2 is located on the lower surface of the tension disk 21, and its outer diameter is the same as the outer diameter of the tension disk 21.

[0030] The rotating device 1 has the same diameter as the tension device 2. The rotating device 1 rotates at high speed and applies false twist to the yarn 8 by friction. The contact point increases the fiber transfer upward, which is used to gather the width of the fiber whiskers in the twisting triangle area and compress the peripheral fibers to transfer to the inside of the whiskers; the contact point untwists the fibers downward, which is used to improve the parallelism of the fiber straightening and balance the yarn torque. The tension device 2 applies constraints to the yarn 8 by its own weight. The rotating table 12 of the rotating device 1 has the same outer diameter as the tension table 22 of the tension device 2, and the fixed shaft 23 can rotate, and the position of the tension disk 21 can be adjusted to ensure that the tension table 22 is in contact with the rotating table 12. The height of the rotating device 1 and the tension device 2 is higher than the distance between the shorter side of the fixed shaft 23 and the upper surface of the motor box 32, ensuring that the tension device 2 can be limited to the fixed shaft 23 and can only do up and down and rotational movements. According to the difference in yarn count, the low-count yarn 8 has more fibers, and the tension device 2 is fixed and does not rotate when it contacts the rotating device 1, thereby increasing the lateral rubbing force of the rotating disk 11, shortening the spinning triangle to a great extent, increasing the tension difference between the central fiber and the peripheral fiber of the yarn 8, and changing the shape and arrangement distribution of the fibers in the single yarn, resulting in the structure of the yarn 8. Major changes have taken place, the structure between fibers has become tighter, and the fiber cohesion has increased; the high-count yarn 8 has fewer fibers, and the tension device 2 is passively rotated. When it contacts the rotating device 1, it rotates along with it, reducing the deterioration of the yarn 8 and reducing breakage. While the rotating device 1 rotates at high speed and applies false twist to the yarn 8 by friction, the fiber modulus can be reduced by the rotating table 12 of the electric heating ceramic sheet, so that the fibers can be fully transferred and the fibers inside the yarn 8 are arranged tightly, thereby improving the strength utilization rate of the yarn 8 and the strength of the yarn 8, and also playing the role of heating and fixing the twist.

[0031] The electromechanical device 3 is fixed directly below the front jaw through the connecting device 4. The motor 31 of the electromechanical device 3 is located at the bottom of the motor box 32. The threaded holes at the front and rear ends of the motor box 32 of the electromechanical device 3 can be adjusted accordingly with screws according to the diameter of the motor 31 to fix the motor 31, and the other end of the motor shaft 33 of the electromechanical device 3 is connected to the head of the motor in the motor 31, which is used to provide power to the rotating device 1 and drive the rotating device 1 to rotate.

[0032] The connecting device 4 is fixed on the yarn guide plate, the connecting rod 41 of the connecting device 4 is connected to the threaded holes at the left and right ends of the electromechanical device 3, the connecting bracket 42 of the connecting device 4 is used to fix the connecting rod 41, and the connecting base 43 of the connecting device 4 is used to fix the connecting bracket 42, which can adjust the distance between the rotating device 1, the tension device 2, and the electromechanical device 3 and the front jaw.

[0033] Please refer to Figure 1 and Figure 2 The present invention also provides a spinning process of a false twist device for adaptively controlling yarn structure, comprising the following steps:

[0034] S1, after the roving is drafted by the drafting mechanism, the yarn 8 is output from the front jaw formed by the front roller 6 and the front leather roller 5;

[0035] S2. The yarn 8 output from the front jaw passes through the gap between the rotating device 1 and the tension device 2. The tension device 2 adjusts the contact behavior and constrains the movement of the yarn 8 by its own weight. The rotating device 1 regulates the fiber arrangement structure by the lateral friction force generated by high-speed rotation. At the same time, the electric heating ceramic plate rotating table 12 of the rotating device 1 heats the yarn 8, and the heating temperature is 100℃-260℃.

[0036] S3. The yarn 8 processed in the above step S2 is wound on the spindle 9 through the yarn guide hook 7 and the wire ring.

[0037] The following is a specific embodiment of spinning using the spinning device of the present invention:

[0038] This embodiment uses the spinning device of the present invention to produce 15tex yarn. The raw material used in the experiment is 100% pure cotton roving, the spindle speed of the ring spinning machine is 8000r / min, and the rotating disk speed is 500, 1000, 1500, and 2000rpm / min (samples 1 to 4, respectively) for spinning, wherein the rotating disk rotates clockwise (consistent with the direction of yarn movement), and the tension disk is driven by the rotating disk to rotate adaptively.

[0039] The main properties of the spun yarn samples were tested, and the residual torque was tested using the wet winding method. The main performance test results of each yarn sample are shown in Table 2:

[0040] Table 2

[0041]

[0042] It can be seen from Table 2 that, compared with the original yarn, the hairiness value and residual torque (wet kink number) of the yarn spun by the spinning device of the present invention under the four schemes are significantly reduced, the breaking strength and elongation at break are improved, and the yarn dryness performance can basically remain unchanged.

[0043] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A false twisting device for adaptively regulating yarn structure, which is arranged at the front jaw, characterized in that: The false twist device comprises: A rotating device, the rotating device comprising a rotating disk, a rotating shaft and a rotating table, the rotating table is fixedly mounted on the rotating disk, the rotating disk is fixedly connected to the rotating shaft, wherein the rotating table is composed of an electrically heated ceramic sheet; A tension device, the tension device comprising a tension disk, a tension table and a fixed shaft, the tension table is fixedly mounted on the tension disk, the tension disk is connected to the fixed shaft, wherein the tension disk is arranged directly above the rotating disk; A motor device, the motor device is connected to the rotating device and is used to drive the rotating device to rotate horizontally, wherein the rotating device and the tension device are fixedly mounted on the motor device; And a connecting device, which is connected to the motor device and is used to adjust the position distribution of the motor device, wherein the yarn passes through the gap between the tension disk and the rotating disk; the tension disk and the fixed shaft form a horizontal rotation connection.

2. A false twisting device for adaptively controlling yarn structure according to claim 1, characterized in that: The motor device comprises a motor, a motor box and a motor shaft. The motor is installed in the motor box. One end of the motor shaft is connected to the motor, and the other end thereof is fixedly connected to the rotating shaft.

3. A false twisting device for adaptively controlling yarn structure according to claim 2, characterized in that: The connecting device includes a connecting rod, a connecting bracket and a connecting seat, wherein the connecting rod is fixedly connected to the motor box, and the connecting seat is connected to the connecting rod through the connecting bracket, wherein the connecting bracket can be adjusted and moved vertically and forward and backward along the connecting seat.

4. A false twisting device for adaptively controlling yarn structure according to claim 1, characterized in that: The heating temperature of the yarn by the electric heating ceramic sheet is 100°C-260°C.

Images