A spinning method and a spinning device for controlling fiber yarn by thread

Abstract

The present invention provides a spinning method and a spinning device for controlling fiber yarn by threads. The spinning device comprises a front roller, a front leather roller, a connecting device, a first thread gathering device and a second thread false twisting device. One end of the connecting device is connected to the front leather roller, and the other end is fixed with the first thread gathering device and the second thread false twisting device. When working, the first thread gathering device and the second thread false twisting device are close to the front roller and driven to rotate by the front roller. When the first thread gathering device and the second thread false twisting device rotate, the yarn structure is adjusted by the driving effect of the opposite lateral feed of the threads on the first thread sleeve and the second thread sleeve. The present invention first bundles the fiber strands by the first thread gathering device, and then dynamically transversely gathers the sub-fiber bundles. The yarn strips are subjected to a cyclic motion by the second thread false twisting device, so as to apply false twist to the yarn surface. The fiber yarn structure is adjusted by the coordinated arrangement of the first thread gathering device and the second thread false twisting device.

Description

Technical Field

[0001] The invention relates to the technical field of textile processing, and in particular to a spinning method and a spinning device for controlling fiber yarn by thread. 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. At present, there are continuous innovations in the research on how to improve the quality of the yarn in the spinning process, especially in reducing hairiness, increasing strength and improving softness.

[0003] Ring spinning technology is widely used because of its strong adaptability to raw materials and wide range of production varieties, but it also has disadvantages such as high yarn hairiness, long production process, difficult quality control and low efficiency. In the traditional ring spinning twisting process, the twist is generated by the movement of the wire ring, and the twist is transmitted from bottom to top to the twisting point. The key technical parameters in the traditional ring spinning twisting mechanism are, first, a certain spinning tension must be possessed, and second, a certain whisker width must be possessed to produce a tension difference between the fibers. The twist torque at the twisting point comes from the rotation of the wire ring. The twist generated by the rotation of the wire ring is first transmitted to the air ring, and then bypasses the yarn guide hook and is transmitted upward to the twisting point. At this time, the high-tension fiber enters the yarn body, and the low-tension fiber is exposed on the surface of the yarn body, forming an internal and external transfer between the fibers. The width of the twisting triangle area is the key in ring spinning technology and a necessary condition for spinning ring yarn. The existence of the twisting triangle area width makes the fabric feel soft and full. On the contrary, if the width of the twisting triangle area is eliminated, the yarn structure will inevitably change, and the fabric style will change. At the same time, the requirement of strong torsional bonding of fibers during twisting is in contradiction with the requirement of low residual torque of yarn after spinning. Therefore, it is a difficulty in the spinning process to make the sliver twist back and forth to meet both the strong torsional bonding and the requirement of no residual torque.

[0004] The new spinning technology uses different twisting means and yarn-forming methods to obtain yarns with different structures, different properties and different labor productivity.

[0005] The compact spinning technology has significant effects in improving yarn strength and reducing hairiness, but it also leads to new problems such as tight yarn, hard feel of the finished fabric, and high production energy consumption. The compact spinning process uses the condensation effect of the negative pressure device to reduce the width of the whisker and eliminate the original spinning twisting triangle area, so that all fibers are tightly condensed into the twisted yarn body. Although the yarn hairiness is reduced to a certain extent and the yarn strength is improved, the airflow compact spinning process still has problems such as cumbersome and complex operation, high energy consumption and high production cost. For example, the Chinese patent number CN201410671777.0, the publication date is 2015.2.4, and the invention is named as a whole-bundle feather removal device for whiskers in the ring spinning process. This invention patent provides a whole-bundle feather removal device with a simple structure and no additional energy consumption. It uses a rotating groove wheel to gather and reshape the triangle area, and dynamically captures the surface fibers of the yarn. However, the fibers are only dynamically gathered along the direction of yarn movement, and there is no horizontal dynamic gathering of the yarn. In addition, in actual production, the fibers will wrap around the rotating groove wheel and cause the yarn to break.

[0006] Low-torque spinning technology uses a false twister to generate temporary cohesive force to change the fiber structure inside the yarn, making the yarn spinnable under low twist conditions. The fiber slivers after being drafted by the front roller of the ring spinning machine enter the compound false twister. The slivers are false-twisted in the mechanism and then twisted into the final single yarn by the yarn guide hook under the action of the wire ring. The main function of the false twist device is to generate a cohesive force during the twisting process of the slivers to rearrange the order of the fibers and form a false twist yarn with low residual torque. Twisting or false twisting can change the shape and fiber arrangement of the sliver or yarn cross section during the spinning process, increase the strength of the yarn, reduce the unexpected elongation of the spinning, enhance the elasticity of the yarn, reduce the hairiness and improve the surface properties, reduce the torque and twist of the post-processing, and improve the quality of the fabric. For example, Chinese patent number CN02118588.3, ​​published on October 15, 2008, is entitled "Method and Equipment for Processing Single-strand Torque-free Ring Yarn". This application provides a new method for processing single-strand torque-free yarn to solve the problem of large residual torque of ring-spun yarn. The false twister generates false twist, so that the twist direction of the yarn sub-fiber bundle is opposite to that of the single-strand yarn synthesized by it, thereby balancing the residual torque inside the yarn. At the same time, it can process low-twist yarn that cannot be processed normally by traditional ring spinning machines. However, the false twister has a complex structure and requires an external power source to drive the false twister to work, which is complicated to operate.

[0007] In view of the problem that the gathering device and twisting device have complex structures and are difficult to combine ingeniously to improve the spinning quality, the principle that the thread can generate axial movement during rotation is introduced into ring spinning. At the same time, the drafting adopts the traditional ring spinning roller drafting structure to develop a spinning device with thread-regulated fiber yarn structure. On the one hand, the segmentation of the thread groove is used to realize the bundling of fiber whiskers, and the rotation of the thread groove is used to promote the gathering of fiber whiskers. On the other hand, a thread groove is used to push the yarn to flip and generate false twist, thereby changing the twist transfer and distribution in the spinning section, so as to change the geometric shape of the twisting triangle and the distribution state of the fibers in the yarn body, thereby improving the yarn quality. Summary of the invention

[0008] An embodiment of the present invention provides a spinning method and a spinning device for controlling fiber yarn by thread. The purpose is, on the one hand, to utilize the segmentation of the thread groove to realize the bundling of fiber strands and the rotation of the thread groove to realize the aggregation of fiber strands, and on the other hand, to promote the yarn to flip by a thread groove to produce false twist, thereby changing the twist transfer and distribution in the spinning section, so as to change the geometric shape of the twisting triangle area and the distribution state of the fiber in the yarn body, thereby improving the yarn quality.

[0009] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0010] A spinning method for controlling fiber yarn formation by a thread, the spinning method comprising: the stretched fiber strands are divided into a plurality of sub-fiber bundles by a thread, the plurality of sub-fiber bundles move leftward under the push of a left thread, and finally the plurality of fiber bundles are gathered in a thread groove, so that the fiber strands are divided into a plurality of micro units and then three-dimensionally controlled and gathered and arranged; the fiber strands gathered in the thread groove move rightward under the push of a right thread, and the fiber strands undergo friction flipping along the side wall of the thread groove during the movement to the right, and the fiber strands produce false twist during the friction flipping.

[0011] At the same time, the present invention also provides a spinning device for realizing the above-mentioned spinning method of controlling fiber yarn by thread, the spinning device comprising a front roller and a front leather roller, and the spinning device further comprising:

[0012] a first thread gathering device, the first thread gathering device comprising a first thread sleeve, a first shaft and a first bearing, the first thread sleeve being rotatably mounted on the first shaft through the first bearing, wherein the first thread sleeve comprises a threaded area and roller contact areas located on both sides of the threaded area;

[0013] a second thread false twisting device, the second thread false twisting device comprising a second thread sleeve, a second shaft and a second bearing, the second thread sleeve being rotatably mounted on the second shaft via the second bearing, wherein the second thread sleeve comprises a threaded area and roller contact areas on both sides of the threaded area, the first thread gathering device and the second thread false twisting device being sequentially arranged at the jaw line of the front roller and the front roller, the threaded area on the first thread sleeve and the threaded area on the second thread sleeve having opposite thread rotation directions;

[0014] and a connecting device, on which the first shaft rod and the second shaft rod are fixedly and horizontally mounted.

[0015] Furthermore, the first thread gathering device is 1-5 mm away from the nip line between the front roller and the front roller, and the second thread gathering device is 5-10 mm away from the nip line between the first thread gathering device and the front roller.

[0016] Furthermore, the connecting device includes a connecting grip, a base frame and a rotating shaft, one end of the connecting grip is connected to the front leather roller shaft, and the other end is provided with a circular hole, and a circular hole is also provided in the middle position of the base frame. The rotating shaft passes through the circular holes on the connecting grip and the base frame and connects the connecting grip and the base frame through the rotating shaft. The base frame can be rotationally displaced relative to the connecting grip through the rotating shaft.

[0017] Furthermore, the thread pitch of the threaded area of ​​the first threaded sleeve is 0.1-0.5mm, the thread depth is 0.5-1mm, the roller contact area width is 5-10mm, and the thread tooth peak of the threaded area is the same as the roller contact area height; the thread pitch of the threaded area of ​​the second threaded sleeve is 0.5-1mm, the thread depth is 0.5-1mm, the roller contact area width is 5-10mm, and the thread tooth peak height of the threaded area of ​​the second threaded sleeve is 1-2mm lower than the roller contact area height.

[0018] Furthermore, the surfaces of the roller contact areas of the first threaded sleeve and the second threaded sleeve are coated with a resin coating or a rubber coating.

[0019] Furthermore, magnets are provided on the first shaft and the second shaft.

[0020] Further, when the ring twisting direction is Z twist, the first thread sleeve thread zone is a left-handed thread, and the second thread sleeve thread zone is a right-handed thread; when the ring twisting direction is S twist, the first thread sleeve thread zone is a right-handed thread, and the second thread sleeve thread zone is a left-handed thread.

[0021] The beneficial effects brought about by the technical solution provided by the embodiments of the present invention are as follows: the spinning device of the thread-regulated fiber yarn-forming structure of the present invention drives the first thread-regulated gathering device and the second thread-regulated false twisting device to rotate through the front roller, and at the same time, the fiber whiskers output by the drafting mechanism are first divided, bundled and rotated by the first thread-regulated gathering device to push the fiber whiskers to achieve fiber gathering and control, and then the yarn is pushed to flip and form false twist by the second thread-regulated false twisting device, thereby changing the twist transmission and distribution of the spinning section, so as to change the geometric shape of the twisting triangle area and the distribution state of the fiber in the yarn body, and improve the yarn quality; in addition, the spinning device of the thread-regulated fiber yarn-forming structure of the present invention has the advantages of ingenious structure, low cost and easy operation, and it can also be directly installed and used on a ring spinning frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the spinning device of the present invention with a thread-controlled fiber yarn-forming structure.

[0023] Figure 2 It is an assembly diagram of a spinning device with a thread-controlled fiber yarn-forming structure according to the present invention.

[0024] Figure 3 It is a schematic diagram of the operation of the first thread gathering device of the spinning device of the thread-regulated fiber yarn-forming structure of the present invention.

[0025] Figure 4 It is a schematic diagram of the operation of the second thread false twist device of the spinning device of the thread-controlled fiber yarn-forming structure of the present invention.

[0026] In the figure: 1-front roller, 2-front leather roller, 21-leather roller shaft, 3-connecting device, 31-connecting grab, 32-base frame, 33-rotating shaft, 4-first thread gathering device, 41-first thread sleeve, 42-first bearing, 43-first shaft, 5-second thread false twisting device, 51-second thread sleeve, 52-second bearing, 53-second shaft, 6-yarn guide hook, 7-wire ring, 8-yarn tube, 9-fiber whiskers, 91-sub-fiber bundle, 10-yarn strip, 11-yarn, 12-thread area, 121-thread tooth peak, 122-thread groove, 13-roller contact area. DETAILED DESCRIPTION

[0027] In order 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.

[0028] Firstly, the present invention provides a spinning method for controlling fiber yarn formation by threads, the spinning method being as follows: the stretched fiber strands are divided into a plurality of sub-fiber bundles by threads, the plurality of sub-fiber bundles move to the left under the push of the left thread, and finally the plurality of fiber bundles are gathered in the thread groove, so that the fiber strands are divided into a plurality of micro units and then three-dimensionally controlled and aggregated; the fiber strands gathered in the thread groove move to the right under the push of the right thread, and the fiber strands are frictionally flipped along the side wall of the thread groove during the movement to the right, and false twist is generated in the fiber strands during the frictional flipping.

[0029] See attached Figures 1 to 4As shown, at the same time, the present invention also provides a spinning device for realizing the above-mentioned spinning method of thread-controlled fiber yarn formation, comprising a front roller 1, a front leather roller 2, a connecting device 3, a first thread gathering device 4 and a second thread false twisting device 5, the connecting device 3 comprises a connecting grab 31, a base frame 32 and a rotating shaft 33, one end of the connecting grab 31 is connected to the front leather roller shaft 21, and the other end is provided with a circular hole, and the middle position of the base frame 32 is also provided with a circular hole, the rotating shaft 33 passes through the circular holes on the connecting grab 31 and the base frame 32 and connects the connecting grab 31 and the base frame 32 through the rotating shaft 33, and the base frame 32 can rotate relative to the connecting grab 31 through the rotating shaft 33 The first thread gathering device 4 is 1 to 5 mm away from the jaw line of the front roller 2 and the front roller 1. The first thread gathering device 4 includes a first thread sleeve 41, a first shaft rod 43 and a first bearing 42. One end of the first shaft rod 43 is fixedly connected to the side wall of one end of the base frame 32. The first bearing 42 is fixedly mounted on the first shaft rod 43. A magnet is provided on the first shaft rod 43. The first thread sleeve 41 includes a thread area 12 and a roller contact area 13. When spinning Z-twisted yarn, the thread on the first thread sleeve 41 is a left-oblique thread. The pitch of the thread area 12 is 0.1 to 0.5 mm, the thread depth is 0.5 to 1 mm, the width of the roller contact area 13 is 5 to 10 mm, and the roller contact The surface of the zone 13 is coated with a resin coating or a rubber coating, and the threaded tooth peaks 121 of the threaded zone are at the same height as the roller contact zone 13. At the same time, a first bearing 42 is embedded in the first threaded sleeve 41, so that the first threaded sleeve 41 is fixed to the first shaft rod 43 through the first bearing 42 and can rotate; the second thread gathering device 5 is 5 to 10 mm away from the jaw line of the first thread gathering device 4 and the front roller 1, and the second thread false twisting device 5 includes a second threaded sleeve 51, a second shaft rod 53 and a second bearing 52, one end of the second shaft rod 53 is fixedly connected to the side wall of the base frame 32 symmetrically to the position of the first shaft rod 43, and the second bearing 52 is fixedly installed on the second shaft rod 53 , a magnet is provided on the second shaft rod 53, the second threaded sleeve 51 includes a threaded area 12 and a roller contact area 13, when spinning Z-twisted yarn, the thread on the second threaded sleeve 51 is a right-hand oblique thread, the pitch of the threaded area 12 is 0.5-1mm, the thread depth is 0.5-1mm, the width of the roller contact area 13 is 5-10mm, and the surface of the roller contact area 13 is coated with resin or rubber. The height of the thread tooth peak 121 of the threaded area 13 of the second threaded sleeve 51 is 1-2mm lower than the height of the roller contact area 13, and a second bearing 52 is embedded in the second threaded sleeve 51, so that the second threaded sleeve 51 is fixed to the first shaft rod 53 through the second bearing 52 and can rotate.

[0030] During spinning, the fiber strands 9 are output from the front jaws formed by the front roller 1 and the front leather roller 2. The first thread gathering device 4 and the second thread false twisting device 5 are attached to the front roller 1 by adjusting the installation angles of the connecting grip 31 and the base frame 32. The first thread gathering device 4 and the second thread false twisting device 5 provide pressure between themselves and the front roller 1 through the magnets provided in the first shaft 43 and the second shaft 53. The front roller drives the first thread gathering device 4 and the second thread false twisting device 5 to rotate. When the stretched fiber sliver 9 enters the meshing line between the first thread gathering device 4 and the front roller 1, the fiber sliver 9 and the front roller 1 form an encircling arc, and the thread tooth peaks 121 on the first thread sleeve 41 and the roller contact area 13 contact the front roller 1 at the same time, and the thread area 12 of the first thread sleeve 41 first divides the fiber sliver 9 into a plurality of sub-fiber bundles 91, and during the rotation of the first thread sleeve 41, the left oblique thread of the thread area 12 on the first thread sleeve 41 pushes the plurality of sub-fiber bundles 91 to move to the left, and finally the plurality of sub-fiber bundles 91 are gathered in the leftmost thread groove 122 of the thread area 12 on the first thread sleeve 41, so that the fiber sliver 9 is divided into a plurality of micro units and then three-dimensionally controlled and gathered, thereby strengthening the wrapping and holding force of the fiber bundle surface hairiness, reshaping it into the shape of the yarn triangle area, reducing the width of the twisting triangle area, and promoting fiber aggregation through the thread to increase the wrapping amount and aggregation tightness of the hairiness on the main trunk of the yarn, so as to realize dynamic capture and gathering of the surface fibers of the yarn sliver 10 Gathering; when the gathered yarn 10 enters the meshing line where the second thread false twist device 5 and the front roller 1 are combined, the yarn 10 and the second thread sleeve 51 form an encircling arc, the roller contact area 13 on the first thread sleeve contacts the front roller 1, and there is a gap of 1 to 2 mm between the thread tooth peak 121 and the front roller 1. During the rotation of the second thread sleeve 51, the right oblique thread of the thread area 12 on the second thread sleeve 51 pushes the yarn 10 to move right. At the same time, due to the gap between the thread tooth peak 121 on the second thread sleeve 51 and the front roller 1, when the left-ward driving force of the first thread gathering device 4 and the synergistic force of the twisted yarn drawing tension of the yarn 10 are greater than the right-ward driving force of the second thread false twist device 5, the yarn 10 will be frictionally flipped along the side wall of the thread groove 122. During the flipping process, the yarn is falsely twisted. At the same time, the flipped yarn 10 turns back to the original thread groove 122, and the dynamic false twist balance of the yarn 10 in the thread groove 122 of the second thread false twist device 5 is formed in sequence. The reverse pushing force of the first thread gathering device 4 and the second thread false twisting device 5 causes the yarn 10 to form an inclined angle between the first thread gathering device 4 and the second thread false twisting device 5. At the same time, the false twisting action of the second thread false twisting device 5 increases the twisting Z-direction transmission of the yarn 10 into the first thread gathering device 4, thereby enhancing the strength of the yarn 10 and ensuring the continuity of the inclined yarn 10, so that the fibers in the yarn body are fully transferred inside and outside to twist and form, thereby enhancing the effect of the thread in pushing and gathering.

[0031] Under the gathering and bundling effect of the first threaded gathering device 4, the fiber slivers 9 are controlled by bundle division, tightly gathered and wrapped on the surface of the false twist yarn 10, forming a yarn 10 with an internal fiber transfer-type embracing inside and outside and an outer fiber spirally smooth wrapped structure. After the yarn 10 is false-twisted by the second threaded false twist device 5, part of the surface fibers of the yarn body are reversely wrapped, and the cross-spiral winding solidifies the tightness of the surface fibers of the yarn body. At the same time, the false twist finishing promotes the release of the stress of the torsional deformed fibers inside the yarn body, thereby achieving the internal torque balance of the yarn body, forming a yarn 11 with tightly wrapped outside and balanced internal fiber torque. The yarn 11 passes through the yarn guide hook 6 and the wire ring 7, and is finally wound on the bobbin 8.

[0032] The following are specific embodiments of spinning using a conventional ring spinning machine and the spinning device of the present invention respectively:

[0033] This embodiment uses a conventional ring spinning machine and the spinning device of the present invention to spin 19.7tex pure cotton yarn for comparative experiments. During the spinning process, the conventional ring spinning machine adopts a conventional spinning process, and the spinning device of the present invention adopts the spinning process of the present invention. In the spinning process, the raw materials and some spinning process parameters used by the conventional ring spinning machine and the spinning device of the present invention are the same. The main properties of yarn samples of various yarn numbers are tested, and the main performance test results of each yarn sample are shown in Table 1:

[0034] Table 1 Main properties of yarns spun by conventional ring spinning machines and the spinning device of the present invention

[0035]

[0036] It can be seen from Table 1 that the hairiness value of the yarn spun by the spinning device of the present invention is significantly reduced; and compared with the yarn spun by the traditional ring spinning machine, the breaking strength and breaking elongation of the yarn spun by the spinning device of the present invention are significantly improved, while the yarn evenness performance can basically remain unchanged, and the twist distribution of the spun 19.7tex pure cotton is more uniform, the residual torque is significantly reduced or even disappears, and the yarn is soft and high-strength.

[0037] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0038] In the absence of conflict, the embodiments and features of the embodiments described herein may be combined with each other.

[0039] 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 spinning device for controlling fiber yarn by thread, the spinning device comprising a front roller and a front top roller, characterized in that: The spinning device also includes: a first thread gathering device, the first thread gathering device comprising a first thread sleeve, a first shaft and a first bearing, the first thread sleeve being rotatably mounted on the first shaft through the first bearing, wherein the first thread sleeve comprises a threaded area and roller contact areas located on both sides of the threaded area; a second thread false twisting device, the second thread false twisting device comprising a second thread sleeve, a second shaft and a second bearing, the second thread sleeve being rotatably mounted on the second shaft via the second bearing, wherein the second thread sleeve comprises a threaded area and roller contact areas on both sides of the threaded area, the first thread gathering device and the second thread false twisting device being sequentially arranged at the jaw line of the front roller and the front roller, the threaded area on the first thread sleeve and the threaded area on the second thread sleeve having opposite thread rotation directions; And a connecting device, the first shaft rod and the second shaft rod are fixedly and horizontally installed on the connecting device; the first thread gathering device is 1-5mm away from the nip line of the front leather roller and the front roller, and the second thread gathering device is 5-10mm away from the nip line of the first thread gathering device and the front roller.

2. A spinning device for controlling fiber yarn by threading according to claim 1, characterized in that: The connecting device includes a connecting grip, a base frame and a rotating shaft. One end of the connecting grip is connected to the front leather roller shaft, and the other end is provided with a circular hole. A circular hole is also provided in the middle of the base frame. The rotating shaft passes through the circular holes on the connecting grip and the base frame and connects the connecting grip and the base frame through the rotating shaft. The base frame can be rotated relative to the connecting grip through the rotating shaft.

3. A spinning device for controlling fiber yarn by threading according to claim 1, characterized in that: The thread pitch of the threaded area of the first threaded sleeve is 0.1-0.5mm, the thread depth is 0.5-1mm, the roller contact area width is 5-10mm, and the thread tooth peak of the threaded area is the same as the roller contact area height; the thread pitch of the threaded area of the second threaded sleeve is 0.5-1mm, the thread depth is 0.5-1mm, the roller contact area width is 5-10mm, and the thread tooth peak height of the threaded area of the second threaded sleeve is 1-2mm lower than the roller contact area height.

4. A spinning device for controlling fiber yarn by threading according to claim 1, characterized in that: The roller contact area surfaces of the first threaded sleeve and the second threaded sleeve are coated with a resin coating or a rubber coating.

5. A spinning device for controlling fiber yarn by threading according to claim 1, characterized in that: Magnets are disposed on the first shaft and the second shaft.

6. A spinning device for controlling fiber yarn by threading according to claim 1, characterized in that: When the ring twisting direction is Z twist, the first thread sleeve thread zone is a left-handed thread, and the second thread sleeve thread zone is a right-handed thread; when the ring twisting direction is S twist, the first thread sleeve thread zone is a right-handed thread, and the second thread sleeve thread zone is a left-handed thread.

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