Method for preventing inner layer from sliding during bobbin yarn unwinding
By setting up a tension control system on the yarn winding equipment and adopting a variety of structural and handling measures, the problem of inner layer of the yarn is solved, the quality of the yarn forming and the stability of the yarn are improved, and the efficient and high-quality progress of textile production is ensured.
Patent Information
- Application Number
- CN202411938294.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-04-25
AI Technical Summary
In air jet weaving machines, the yarn is prone to slide when the tube yarn is detached to the inner layer, resulting in broken yarn and broken wire, affecting the weaving quality, especially for fine yarn and ultrafine yarn.
A tension control system is set up on the yarn winding equipment, including a tension sensor, controller and actuator, to monitor and adjust the yarn tension in real time, and adopt a step-by-step speed-growing winding mode, a special starting buffer base layer and adhesive treatment, combined with the special arrangement of alternating twist directions and a segmented temperature-controlled heating treatment, the winding structure is further consolidated.
By accurately controlling the tension of the inner layer of yarn and enhancing the friction between the yarns, the inner layer can be effectively avoided sliding, the quality of the yarn forming, the stability and reliability of the yarn are enhanced, and the efficient and high-quality progress of textile production is ensured.
Smart Images
Figure CN119873515A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of textile technology, in particular to a method for preventing the inner layer of a tube from sliding after decomposition. Background Art
[0002] After the twisting of the twisted bobbin is completed, during the weaving process in the cloth factory, due to the high speed and high efficiency of the jet loom, when the bobbin is decoupled to the inner layer, the yarn will slip, causing yarn breakage and silk breakage, affecting the weaving quality, especially for fine yarn. The inner layer tension of the superfine yarn bobbin is small, which is more likely to cause slippage. Therefore, it is urgent to develop an effective method to prevent the inner layer of the bobbin from slipping, so as to meet the growing high-quality production needs of the textile industry. Summary of the invention
[0003] The object of the present invention is to provide a method for preventing the inner layer of the bobbin from sliding due to decomposition, which can solve the above technical problems.
[0004] The present invention provides a method for preventing the inner layer of a tube yarn from sliding due to decomposition. A tension control system is arranged on a tube yarn winding device. The tension control system comprises a tension sensor, a controller and an actuator. During the winding stage of the inner layer yarn of the tube yarn, the tension sensor monitors the yarn tension in real time and transmits the signal to the controller. The controller drives the actuator to apply a predetermined tension to the yarn according to a preset tension value, so that the inner layer yarn is tightly and evenly wound on the tube yarn tube.
[0005] Preferably, the actuator is a yarn guide roller driven by a variable frequency motor. When the tension sensor detects that the yarn tension deviates from a predetermined value, the controller drives the variable frequency motor to adjust the rotation speed of the yarn guide roller, thereby accurately adjusting the yarn tension, and the rotation speed adjustment accuracy reaches ±5 rpm.
[0006] Preferably, during the bobbin winding process, a step-by-step speed-increasing winding mode is adopted, that is, in the initial stage after the inner layer yarn starts to be wound, it is operated at a lower basic winding speed. After each predetermined number of layers are wound, the winding speed is gradually increased according to a preset gradient value, so that the inner layer yarn fits tightly layer by layer. The basic winding speed is 20%-40% of the normal winding speed, the normal winding speed is 1000-1500 rpm, the preset gradient value is 30-80 rpm, and the speed is increased every 3-5 layers.
[0007] Preferably, at the initial stage of winding the inner layer of yarn in the tube yarn, 1-2 layers of yarn are first wound at ultra-slow speed as a buffer base layer, and the winding speed of the buffer base layer is 10%-20% (excluding 20%) of the normal winding speed, and during the winding process of this layer of yarn, a small amount of pre-fixed adhesive is sprayed on the yarn, and the pre-fixed adhesive is a low-viscosity polyvinyl alcohol solution, and the spraying amount is 0.05-0.1 ml per meter of yarn.
[0008] Preferably, during the winding process of the inner layer yarn of the tube yarn, an appropriate amount of main adhesive is sprayed on the yarn, wherein the main adhesive is a curable acrylic emulsion, and the spraying amount is 0.2-0.4 ml per meter of yarn. After spraying, the main adhesive forms a cured film with a certain elasticity on the surface of the yarn, which enhances the friction between the yarns and prevents the inner layer from sliding. In addition, the cured film can be appropriately extended under the action of the yarn tension during the subsequent debonding process, and does not affect the normal debonding of the yarn.
[0009] Preferably, the inner yarn of the tube yarn is arranged in a special way of alternating twist direction, the twist directions of two adjacent layers of yarn are opposite, and a twist cycle is performed every 4-6 layers of yarn, so that the twist of the yarn itself is mutually restricted to reduce the sliding tendency of the inner layer.
[0010] Preferably, after the bobbin is wound, the bobbin is subjected to a segmented temperature-controlled heating treatment, and the bobbin is divided into two sections, the lower section of the bobbin is first heated to 35-45°C and maintained for 8-12 minutes, and then the upper section of the bobbin is heated to 45-55°C and maintained for 10-15 minutes, so that the inner yarn is further shaped and the winding structure is consolidated. During the heating process, the bobbin rotates at a uniform speed of 10-20 rpm.
[0011] Preferably, the surface of the bobbin is plasma treated to form a micro-nano composite structure, including a micro-convex texture and a nano-scale rough surface, wherein the micro-convex texture has a height of 0.03-0.08 mm and a spacing of 0.4-0.8 mm, and the nano-scale rough surface has a roughness Ra of 0.01-0.03 μm, so as to increase the friction between the yarn and the bobbin and prevent the inner layer from sliding.
[0012] Preferably, the unwinding device is equipped with a dynamic friction compensation mechanism, which includes a pressure sensor and an electromagnetic adjustment device. The pressure sensor monitors the friction between the yarn and the yarn guiding component in real time. When the friction is lower than a preset threshold, the electromagnetic adjustment device automatically applies micro-pressure to stabilize the friction within an appropriate range. The preset threshold is pre-set according to the yarn type and the unwinding speed.
[0013] Preferably, the environmental humidity of the cop winding workshop is controlled at 40%-60%, and the temperature is controlled at 20-25°C, to provide stable environmental conditions for cop winding and yarn curing, reduce the impact of environmental factors on yarn performance and cop structure, and further prevent inner layer sliding.
[0014] Beneficial effects:
[0015] The present invention uses a tension control system to accurately regulate the tension of the inner yarn, ensure that the yarn is evenly and tightly wound, effectively avoid inner layer sliding caused by uneven tension, improve the tube yarn forming quality, overcome the problems existing in the prior art, improve the stability and reliability of tube yarn decomposition, and ensure efficient and high-quality textile production. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0017] Figure 1 It is a structural schematic diagram of the bobbin in the present invention.
[0018] Explanation of reference numerals: 1- bobbin, 2- micro-convex texture. DETAILED DESCRIPTION
[0019] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.
[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0022] Example 1
[0023] A method for preventing the inner layer of a bobbin from sliding due to decompression, a tension control system is arranged on a bobbin winding device, the tension control system comprises a tension sensor, a controller and an actuator, during the inner yarn winding stage of the bobbin, the tension sensor monitors the yarn tension in real time and transmits the signal to the controller, and the controller drives the actuator to apply a predetermined tension to the yarn according to a preset tension value, so that the inner yarn is tightly and evenly wound on the bobbin.
[0024] The actuator is a yarn guide roller driven by a variable frequency motor. When the tension sensor detects that the yarn tension deviates from the preset value, the controller drives the variable frequency motor to adjust the speed of the yarn guide roller, thereby accurately adjusting the yarn tension. The speed adjustment accuracy reaches ±5 rpm.
[0025] During the bobbin winding process, a step-by-step speed-increasing winding mode is adopted, that is, in the initial stage after the inner layer of yarn begins to be wound, it runs at a lower basic winding speed. After each predetermined number of layers are wound, the winding speed is gradually increased according to the preset gradient value, so that the inner layer of yarn fits tightly layer by layer. The basic winding speed is 20% of the normal winding speed, the normal winding speed is 1500 rpm, the preset gradient value is 30 rpm, and the speed is increased once every 3 layers are wound.
[0026] At the beginning stage of winding the inner layer of yarn in the tube, a layer of yarn is first wound at an ultra-slow speed as a buffer base layer. The winding speed of the buffer base layer is 10% of the normal winding speed. During the winding process of this layer of yarn, a small amount of pre-fixed adhesive is sprayed on the yarn. The pre-fixed adhesive is a low-viscosity polyvinyl alcohol solution, and the spraying amount is 0.05 ml per meter of yarn.
[0027] During the winding process of the inner yarn of the tube yarn, an appropriate amount of main adhesive is sprayed on the yarn. The main adhesive is a curable acrylic emulsion, and the spraying amount is 0.2 ml per meter of yarn. After spraying, the main adhesive forms a cured film with a certain elasticity on the surface of the yarn, which enhances the friction between the yarns and prevents the inner layer from sliding. In addition, the cured film can be appropriately extended under the action of the yarn tension during the subsequent debonding process, and does not affect the normal debonding of the yarn.
[0028] The inner yarn of the tube yarn is arranged in a special way with alternating twist directions. The twist directions of the two adjacent layers of yarn are opposite, and a twist cycle is performed every 4 layers of yarn. The twist of the yarn itself is mutually restrained to reduce the sliding tendency of the inner layer.
[0029] After the bobbin is wound, it is subjected to segmented temperature-controlled heating treatment, and the bobbin is divided into two sections, the lower section is heated to 35°C and kept for 8 minutes, and then the upper section is heated to 45°C and kept for 10 minutes, so that the inner yarn is further shaped and the winding structure is consolidated. During the heating process, the bobbin rotates at a uniform speed of 10 rpm.
[0030] The surface of the bobbin tube 1 is plasma treated to form a micro-nano composite structure, including a micro-convex texture 2 and a nano-scale rough surface. The height of the micro-convex texture is 0.03 mm, the spacing is 0.4 mm, and the roughness Ra of the nano-scale rough surface is 0.01 μm, so as to increase the friction between the yarn and the bobbin tube and prevent the inner layer from sliding.
[0031] The unwinding device is equipped with a dynamic friction compensation mechanism, which includes a pressure sensor and an electromagnetic adjustment device. The pressure sensor monitors the friction between the yarn and the yarn guide component in real time. When the friction is lower than the preset threshold, the electromagnetic adjustment device automatically applies micro-pressure to stabilize the friction within an appropriate range. The preset threshold is pre-set according to the yarn type and unwinding speed.
[0032] The environmental humidity of the bobbin winding workshop is controlled at 40% and the temperature is controlled at 20°C, which provides stable environmental conditions for bobbin winding and yarn curing, reduces the impact of environmental factors on yarn performance and bobbin structure, and further prevents inner layer sliding.
[0033] Example 2
[0034] A method for preventing the inner layer of a bobbin from sliding due to decompression, a tension control system is arranged on a bobbin winding device, the tension control system comprises a tension sensor, a controller and an actuator, during the inner yarn winding stage of the bobbin, the tension sensor monitors the yarn tension in real time and transmits the signal to the controller, and the controller drives the actuator to apply a predetermined tension to the yarn according to a preset tension value, so that the inner yarn is tightly and evenly wound on the bobbin.
[0035] The actuator is a yarn guide roller driven by a variable frequency motor. When the tension sensor detects that the yarn tension deviates from the preset value, the controller drives the variable frequency motor to adjust the speed of the yarn guide roller, thereby accurately adjusting the yarn tension. The speed adjustment accuracy reaches ±5 rpm.
[0036] During the bobbin winding process, a step-by-step speed-increasing winding mode is adopted, that is, in the initial stage after the inner layer of yarn begins to be wound, it runs at a lower basic winding speed. After each predetermined number of layers are wound, the winding speed is gradually increased according to the preset gradient value, so that the inner layer of yarn fits tightly layer by layer. The basic winding speed is 40% of the normal winding speed, the normal winding speed is 1000 rpm, the preset gradient value is 80 rpm, and the speed is increased once every 5 layers.
[0037] At the beginning stage of winding the inner layer of yarn in the tube, 1-2 layers of yarn are first wound at ultra-slow speed as a buffer base layer. The winding speed of the buffer base layer is 15% of the normal winding speed. During the winding process of this layer of yarn, a small amount of pre-fixed adhesive is sprayed on the yarn. The pre-fixed adhesive is a low-viscosity polyvinyl alcohol solution, and the spraying amount is 0.1 ml per meter of yarn.
[0038] During the winding process of the inner yarn of the tube yarn, an appropriate amount of main adhesive is sprayed on the yarn. The main adhesive is a curable acrylic emulsion, and the spraying amount is 0.4 ml per meter of yarn. After spraying, the main adhesive forms a cured film with a certain elasticity on the surface of the yarn, which enhances the friction between the yarns and prevents the inner layer from sliding. In addition, the cured film can be appropriately extended under the action of the yarn tension during the subsequent debonding process, and does not affect the normal debonding of the yarn.
[0039] The inner yarn of the tube yarn is arranged in a special way with alternating twist directions. The twist directions of the two adjacent layers of yarn are opposite, and a twist cycle is performed every 6 layers of yarn. The twist of the yarn itself is mutually restrained to reduce the sliding tendency of the inner layer.
[0040] After the bobbin is wound, it is subjected to segmented temperature-controlled heating treatment, and the bobbin is divided into two sections, the lower section is heated to 45°C and kept for 12 minutes, and then the upper section is heated to 55°C and kept for 15 minutes, so that the inner yarn is further shaped and the winding structure is consolidated. During the heating process, the bobbin rotates at a uniform speed of 20 rpm.
[0041] like Figure 1 As shown, the surface of the bobbin is plasma treated to form a micro-nano composite structure, including a micro-convex texture and a nano-scale rough surface. The height of the micro-convex texture is 0.08 mm, the spacing is 0.8 mm, and the roughness Ra of the nano-scale rough surface is 0.03 μm, so as to increase the friction between the yarn and the bobbin and prevent the inner layer from sliding.
[0042] The unwinding device is equipped with a dynamic friction compensation mechanism, which includes a pressure sensor and an electromagnetic adjustment device. The pressure sensor monitors the friction between the yarn and the yarn guide component in real time. When the friction is lower than the preset threshold, the electromagnetic adjustment device automatically applies micro-pressure to stabilize the friction within an appropriate range. The preset threshold is pre-set according to the yarn type and unwinding speed.
[0043] The environmental humidity of the bobbin winding workshop is controlled at 60% and the temperature is controlled at 25°C, which provides stable environmental conditions for bobbin winding and yarn curing, reduces the impact of environmental factors on yarn performance and bobbin structure, and further prevents inner layer sliding.
[0044] The present invention uses a tension control system to accurately control the tension of the inner yarn, ensure that the yarn is evenly and tightly wound, effectively avoid inner layer sliding caused by uneven tension, and improve the quality of tube yarn forming; adopt a step-type speed-increasing winding mode, a special starting buffer base layer and adhesive treatment, so that the inner yarn layers are tightly fitted, the bonding force between the yarns is enhanced, and sliding is prevented from the structure; the alternating twist direction arrangement of the inner yarn utilizes the twist of the yarn itself to restrain each other, further stabilizes the inner layer structure, and reduces the sliding tendency; the segmented temperature-controlled heating treatment promotes further shaping of the yarn and consolidates the winding effect; the micro-nano composite structure on the surface of the tube yarn, the dynamic friction compensation mechanism during the decoupling process, and the stable workshop environment control comprehensively guarantee the stability of the inner layer of the tube yarn during the decoupling process, and improve the textile production efficiency and yarn quality.
[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements 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. A method for preventing the inner layer of a bobbin from sliding due to decomposition, characterized in that: A tension control system is arranged on the bobbin winding device, and the tension control system includes a tension sensor, a controller and an actuator. During the inner yarn winding stage of the bobbin, the tension sensor monitors the yarn tension in real time and transmits the signal to the controller. The controller drives the actuator to apply a predetermined tension to the yarn according to a preset tension value, so that the inner yarn is tightly and evenly wound on the bobbin.
2. The method for preventing the inner layer of the bobbin from sliding due to decomposition according to claim 1, characterized in that: The actuator is a yarn guide roller driven by a variable frequency motor. When the tension sensor detects that the yarn tension deviates from a preset value, the controller drives the variable frequency motor to adjust the rotation speed of the yarn guide roller, thereby accurately adjusting the yarn tension.
3. The method for preventing the inner layer of the bobbin from sliding due to decomposition according to claim 1, characterized in that: During the bobbin winding process, a step-by-step speed-increasing winding mode is adopted, that is, in the initial stage after the inner yarn starts to be wound, it is operated at a lower basic winding speed. After each predetermined number of layers are wound, the winding speed is gradually increased according to a preset gradient value, so that the inner yarn fits tightly layer by layer. The basic winding speed is 20%-40% of the normal winding speed, and the preset gradient value is 30-80 rpm, and the speed is increased every 3-5 layers.
4. The method for preventing the inner layer of the bobbin from sliding due to decomposition according to claim 3, characterized in that: At the beginning stage of winding the inner layer of yarn in the tube yarn, 1-2 layers of yarn are first wound at ultra-low speed as a buffer base layer. The winding speed of the buffer base layer is 10%-20% of the normal winding speed. During the winding process of this layer of yarn, a small amount of pre-fixed adhesive is sprayed on the yarn. The pre-fixed adhesive is a low-viscosity polyvinyl alcohol solution, and the spraying amount is 0.05-0.1 ml per meter of yarn.
5. The method for preventing the inner layer of the bobbin from sliding due to decomposition according to claim 4, characterized in that: During the winding process of the inner yarn of the tube yarn, a proper amount of the main adhesive is sprayed on the yarn. The main adhesive is a curable acrylic ester emulsion, and the spraying amount is 0.2-0.4 ml per meter of yarn.
6. The method for preventing the inner layer of the bobbin from sliding due to decomposition according to claim 1, characterized in that: The inner yarn of the tube yarn is arranged in a special way with alternating twist directions. The twist directions of the two adjacent layers of yarn are opposite, and a twist cycle is performed every 4-6 layers of yarn. The twist of the yarn itself is mutually restrained to reduce the sliding tendency of the inner layer.
7. The method for preventing the inner layer of the bobbin from sliding due to decomposition according to claim 1, characterized in that: After the bobbin is wound, it is subjected to segmented temperature-controlled heating treatment, and the bobbin is divided into two sections, the lower section is heated to 35-45°C and kept for 8-12 minutes, and then the upper section is heated to 45-55°C and kept for 10-15 minutes to further shape the inner yarn and consolidate the winding structure. During the heating process, the bobbin rotates at a uniform speed of 10-20 rpm.
8. The method for preventing the inner layer of the bobbin from sliding due to decomposition according to claim 1, characterized in that: The surface of the bobbin tube is treated by plasma to form a micro-nano composite structure, including a micro-convex texture and a nano-scale rough surface. The micro-convex texture has a height of 0.03-0.08 mm and a spacing of 0.4-0.8 mm. The roughness Ra of the nano-scale rough surface is 0.01-0.03 μm.
9. The method for preventing the inner layer of the bobbin from sliding due to decomposition according to claim 1, characterized in that: The unwinding device is equipped with a dynamic friction compensation mechanism, which includes a pressure sensor and an electromagnetic adjustment device. The pressure sensor monitors the friction between the yarn and the yarn guide component in real time.
10. The method for preventing the inner layer of the bobbin from sliding due to decomposition according to claim 1, characterized in that: The environmental humidity of the bobbin winding workshop is controlled at 40%-60%, and the temperature is controlled at 20-25℃.