Blended yarn production device, blended yarn, and method for producing the same

Abstract

This invention provides a blended yarn production apparatus, blended yarn, and a production method thereof. The blended yarn production apparatus includes a first guide roller, a second guide roller, a first pressure sensor, a second pressure sensor, a front roller, a tension compensation unit, and a control unit. The first and second guide rollers are arranged side by side, and the first and second pressure sensors are respectively disposed in the grooves of the first and second guide rollers. The front roller is located downstream of the first and second guide rollers along the yarn feeding direction. The tension compensation unit is located upstream of the first and / or second guide rollers along the yarn feeding direction. The output terminals of both the first and second pressure sensors are connected to the input terminal of the control unit, and the output terminal of the control unit is connected to the input terminal of the tension compensation unit. This blended yarn production apparatus and method can improve the structural stability of the spinning twisting triangle zone and improve the performance of the blended yarn.

Description

Technical Field

[0001] This invention relates to the field of textile technology, and in particular to a blended yarn production apparatus, blended yarn, and a production method thereof. Background Technology

[0002] Wrapped yarn is a new type of yarn structure, formed by combining two or more components. In terms of performance, wrapped yarn can compensate for the deficiencies of single-component fibers and leverage the advantages of composite fibers. Through fiber compounding, textile fabrics can exhibit new styles, high elasticity, and special functions that cannot be achieved with single materials.

[0003] With the continuous development of society, people's consumption concepts have gradually shifted to focusing on the appearance, feel, elasticity, and wear resistance of products, prompting textiles to develop in the direction of personalization, diversification, functionality, and safety, comfort, and harmlessness.

[0004] However, when using traditional blended yarn production equipment and preparation methods to produce blended yarns with a mesh structure, the different moduli between staple yarn and filament, and between monofilament wrapping yarn and filament, and the unstable tension of the yarn bundle, will lead to different tensions between the two during wrapping. This will result in unstable structure of the spinning twisting triangle area, affecting the stability of production and the performance of the blended yarn.

[0005] Therefore, improving the structural stability of the spinning twisting triangle zone and enhancing the performance of blended yarns during the production of mesh-structured blended yarns has become one of the important research directions in this field. Summary of the Invention

[0006] Based on this, the present invention provides a blended yarn production device that can improve the structural stability of the spinning twisting triangle zone and improve the performance of blended yarn, and provides corresponding blended yarn and its production method.

[0007] The technical solution proposed in this invention is as follows:

[0008] According to a first aspect of the present invention, a blended yarn production apparatus is provided, comprising a first guide roller, a second guide roller, a first pressure sensor, a second pressure sensor, a front roller, a tension compensation unit, and a control unit;

[0009] The first guide wheel and the second guide wheel are arranged side by side, and the first pressure sensor and the second pressure sensor are respectively disposed in the grooves of the first guide wheel and the second guide wheel;

[0010] The front roller is located downstream of the first guide roller and the second guide roller along the yarn conveying direction;

[0011] The tension compensation unit is located upstream of the first guide roller and / or the second guide roller along the yarn feeding direction. The tension compensation unit is used to adjust the tension of the yarn on the first guide roller or the second guide roller.

[0012] The output terminals of the first pressure sensor and the second pressure sensor are both connected to the input terminal of the control unit, and the output terminal of the control unit is connected to the input terminal of the tension compensation unit. The control unit is used to control the tension compensation unit to adjust the tension of the yarn according to the detection signals of the first pressure sensor and the second pressure sensor.

[0013] In any embodiment, the tension compensation unit includes a tension compensation mechanism and a tension compensation drive mechanism;

[0014] The tension compensation mechanism includes a fixed block and a movable block. The movable block is mounted on the fixed block and can move relative to the fixed block. The fixed block is provided with a first yarn winding post, and the movable block is provided with a second yarn winding post. The first yarn winding post and the second yarn winding post are staggered. When the movable block moves relative to the fixed block, it can change the distance between the first yarn winding post and the second yarn winding post.

[0015] The input end of the tension compensation drive mechanism is connected to the output end of the control unit, and the output end of the tension compensation drive mechanism is connected to the movable block. The tension compensation drive mechanism is used to drive the movable block to move relative to the fixed block.

[0016] In any implementation, the fixed block and the movable block are slidably connected by the cooperation of a groove and a convex strip.

[0017] In any embodiment, the tension compensation drive mechanism includes one or more of a motor and a cylinder.

[0018] In any embodiment, the control unit includes a tension detector, a programmable controller, and a drive controller. The output terminals of the first pressure sensor and the second pressure sensor are both connected to the input terminal of the tension detector. The output terminal of the tension detector is connected to the input terminal of the programmable controller. The output terminal of the programmable controller is connected to the input terminal of the drive controller. The output terminal of the drive controller is connected to the input terminal of the tension compensation unit.

[0019] In any embodiment, the blended yarn production device further includes a speed-regulating yarn guide rod and a yarn guide rod drive mechanism. The speed-regulating yarn guide rod is located upstream of the tension compensation unit along the yarn conveying direction. The speed-regulating yarn guide rod is connected to the output end of the yarn guide rod drive mechanism, and the input end of the yarn guide rod drive mechanism is connected to the output end of the drive controller.

[0020] In any embodiment, the blended yarn production apparatus further includes a short fiber drafting mechanism, which includes a middle roller and a rear roller, and the middle roller and the rear roller are sequentially located upstream of the front roller along the short fiber sliver conveying direction.

[0021] According to a second aspect of the present invention, a method for producing blended yarn is provided, wherein the blended yarn is produced using the blended yarn production apparatus of the first aspect of the present invention, the method comprising the following steps:

[0022] The first filament is sequentially introduced into the front nip of the front roller through the tension compensation unit and the first guide roller. The short fiber sliver is then drawn into short fiber yarn and introduced into the front nip of the front roller.

[0023] The first filament and the short fiber yarn are first ring-twisted and wrapped to obtain monofilament wrapped yarn. During the first ring-twisting and wrapping process, the pressure of the first filament acting on the first pressure sensor is detected by the first pressure sensor. The control unit controls the tension compensation unit to adjust the tension of the first filament according to the pressure detection signal so that the twisting triangle area of ​​the first ring-twisting and wrapping maintains the shape of an isosceles triangle or approximately an isosceles triangle.

[0024] In any embodiment, before the first filament is introduced into the first guide wheel, the first filament is passed around the speed-regulating guide rod; during the first ring twisting and wrapping process, the control unit adjusts the tension of the first filament by controlling the rotation speed of the speed-regulating guide rod according to the pressure detection signal, so that the twisting triangle area of ​​the first ring twisting and wrapping maintains the shape of an isosceles triangle or approximately an isosceles triangle.

[0025] In any embodiment, after obtaining the monofilament wrapped yarn, the blended yarn production method further includes the following steps:

[0026] The prepared monofilament wrapped yarn is sequentially introduced into the front nip of the front roller through the tension compensation unit and the first guide roller, and the second filament is sequentially introduced into the front nip of the front roller through another tension compensation unit and the second guide roller.

[0027] The second filament and the monofilament wrapped yarn are twisted and wrapped in a second ring spindle to obtain a blended yarn. The twisting direction of the second ring spindle twisting and wrapping is different from that of the first ring spindle twisting and wrapping. During the second ring spindle twisting and wrapping process, the pressure of the monofilament wrapped yarn acting on the first pressure sensor is detected by the first pressure sensor, and the pressure of the second filament acting on the second pressure sensor is detected by the second pressure sensor. The control unit controls the tension compensation unit to adjust the tension of the monofilament wrapped yarn and / or the second filament according to the above two pressure detection signals so that the twisting triangle area of ​​the second ring spindle twisting and wrapping maintains the shape of an isosceles triangle or approximately an isosceles triangle.

[0028] In any embodiment, before the monofilament wrapping yarn is introduced into the first guide wheel, the monofilament wrapping yarn is passed around the speed-regulating guide rod; before the second filament is introduced into the second guide wheel, the second filament is passed around another speed-regulating guide rod; during the second ring twisting and wrapping process, the control unit adjusts the tension of the monofilament wrapping yarn and / or the second filament by controlling the rotation speed of the speed-regulating guide rod according to the pressure detection signal, so that the twisting triangle area of ​​the second ring twisting and wrapping maintains the shape of an isosceles triangle or approximately an isosceles triangle.

[0029] According to a third aspect of the present invention, a blended yarn is provided, which is produced by the blended yarn production apparatus of the first aspect of the present application or by the blended yarn production method of the second aspect of the present application.

[0030] Compared with the prior art, the present invention has at least the following beneficial effects:

[0031] The blended yarn production apparatus of the present invention, through the cooperation of the first pressure sensor, the second pressure sensor, the tension compensation unit and the control unit, can effectively improve the morphological stability of the twisting triangle region during ring spinning and winding, so that the twisting triangle region maintains the shape of an isosceles triangle or a near-isosceles triangle, thereby improving the stability of blended yarn production and improving the yarn forming performance of blended yarn.

[0032] In addition, the blended yarn production device, through the speed-regulating yarn guide rod and the yarn guide rod drive mechanism in conjunction with the tension compensation unit, can better adjust the tension of the yarn, better improve the shape of the twisting triangle zone, and better maintain the twisting triangle zone as an isosceles triangle or approximately an isosceles triangle.

[0033] Furthermore, the blended yarn production method of the present invention uses a two-step composite spinning process of first ring twisting and wrapping and second ring twisting and wrapping, so that the twisting directions of the second ring twisting and wrapping and the first ring twisting and wrapping are different, which can obtain a blended yarn with a better quality and a mesh structure, and can reduce the doubling and twisting processes in the conventional production of mesh structure yarns. Attached Figure Description

[0034] To better describe and illustrate the embodiments or examples provided by the present invention, reference may be made to one or more accompanying drawings. Additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the disclosed invention, the currently described embodiments or examples, or the best mode of these inventions as currently understood. Furthermore, throughout the drawings, the same reference numerals denote the same parts. In the drawings:

[0035] Figure 1 This is a schematic diagram of the structure of a blended yarn production apparatus according to an embodiment of the present invention when producing monofilament wrapped yarn;

[0036] Figure 2 This is a schematic diagram of the structure of a blended yarn production device according to an embodiment of the present invention during the production of blended yarn.

[0037] Figure 3 A schematic diagram of the twisting triangle zone in a traditional blended yarn production device;

[0038] Figure 4 This is a schematic diagram of the twisting triangle region of a blended yarn production apparatus according to an embodiment of the present invention;

[0039] Figure 5 This is a schematic diagram of the tension compensation mechanism in a blended yarn production device according to an embodiment of the present invention;

[0040] Figure 6 A schematic diagram of the structure of a mesh-like blended yarn;

[0041] Figure 7 This is a control flow chart of a blended yarn production apparatus according to one embodiment of the present invention.

[0042] Explanation of reference numerals in the attached figures:

[0043] 10. Blended yarn production device; 101. First guide roller; 102. Second guide roller; 103. First pressure sensor; 104. Second pressure sensor; 105. Front roller; 106. Tension compensation unit; 106a. Tension compensation mechanism; 106b. Tension compensation drive mechanism; 106a-1. Fixed block; 106a-2. Movable block; 106a-3. First yarn winding post; 106a-4. Second yarn winding post; 107. Control unit; 107a. Programmable controller; 108a. Speed-regulating yarn guide rod; 108b. Yarn guide rod drive mechanism; 109. Middle roller; 110. Rear roller; 111. Front nip;

[0044] 20. First filament; 30. Short fiber sliver; 40. Monofilament wrapped yarn; 50. Twisted triangle zone; 60. Second filament; 70. Blended yarn; 80. Short fiber yarn. Detailed Implementation

[0045] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described in detail below. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0049] Traditional blended yarn production processes (such as Sirofil spinning) produce blended yarns with a web-like structure. However, differences in modulus between staple yarns and filaments, and between monofilament wrapped yarns and filaments, as well as unstable yarn bundle tension, lead to varying tensions during wrapping. This instability in the twisting triangle region of the ring-spun yarn results in unstable yarn structure, affecting the stability of blended yarn production and its performance. To address this, this invention improves the blended yarn production equipment and method, effectively enhancing the structural stability of the twisting triangle region and thus improving the production stability and performance of the blended yarn.

[0050] Please see Figure 1 , Figure 2 and Figure 4In some embodiments of the present invention, a blended yarn production apparatus 10 is provided, which includes a first guide roller 101, a second guide roller 102, a first pressure sensor 103, a second pressure sensor 104, a front roller 105, a tension compensation unit 106, and a control unit 107.

[0051] The first guide roller 101 and the second guide roller 102 are arranged side by side. The first pressure sensor 103 and the second pressure sensor 104 are respectively located in the grooves of the first guide roller 101 and the second guide roller 102. The front roller 105 is located downstream of the first guide roller 101 and the second guide roller 102 along the yarn feeding direction. The tension compensation unit 106 is located upstream of the first guide roller 101 and / or the second guide roller 102 along the yarn feeding direction. The tension compensation unit 106 is used to adjust the tension of the yarn on the first guide roller 101 or the second guide roller 102. The output terminals of the first pressure sensor 103 and the second pressure sensor 104 are both connected to the input terminal of the control unit 107. The output terminal of the control unit 107 is connected to the input terminal of the tension compensation unit 106. The control unit 107 is used to control the tension compensation unit 106 to adjust the tension of the yarn according to the detection signals of the first pressure sensor 103 and the second pressure sensor 104.

[0052] In traditional blended yarn production processes, filament and staple yarns are typically ring-twisted and wound together on a spinning frame using Sirofil spinning to form wound yarn. When producing blended yarns with a mesh structure, the wound yarn needs to undergo doubling and twisting processes. Because the two yarns have different moduli during ring twisting and winding, their tensions differ during winding, leading to instability in the twisting triangle 50 of the ring-twisted yarn. This affects the stability of blended yarn production and the performance of the blended yarn.

[0053] Please refer to the schematic diagram of the unstable structure in the spinning twisting triangle region 50. Figure 3 Through the Figure 3 Force analysis of the twisting point 50 in the spinning twisting triangle region yields the following results:

[0054] In the x-direction (horizontal direction): T1sinβ1=T2sinβ2;

[0055] In the y-direction (vertical direction): T1cosβ1 + T2cosβ2 = T;

[0056] β1 > β2; T1 < T2;

[0057] To ensure the stability of the morphological structure of the spinning twisting triangle 50, it is necessary to make β1=β2 and T1=T2 as much as possible.

[0058] Therefore, it is necessary to increase Figure 3The tension T1 of the yarn on the left side makes the shape and structure of the spinning twisting triangle 50 closer to an isosceles triangle (i.e., β1≈β2).

[0059] The blended yarn production apparatus 10 of the present invention includes a first pressure sensor 103 and a second pressure sensor 104 respectively installed in the grooves of the first guide wheel 101 and the second guide wheel 102, and a tension compensation unit 106 installed upstream of the first guide wheel 101 and / or the second guide wheel 102 along the yarn conveying direction; the output ends of the first pressure sensor 103 and the second pressure sensor 104 are both connected to the input end of the control unit 107, and the output end of the control unit 107 is connected to the input end of the tension compensation unit 106.

[0060] When using this blended yarn production apparatus 10 to produce blended yarns with a mesh structure, please refer to... Figure 1 First, the first filament 20 is sequentially introduced through the tension compensation unit 106 and the first guide roller 101 to the front nip 111 of the front roller 105. Then, the short fiber sliver 30 is drawn into short fiber yarn 80 and introduced into the front nip 111 of the front roller 105. The first filament 20 and the short fiber yarn 80 are then subjected to a first ring twisting and wrapping process to obtain a monofilament wrapped yarn 40. Please refer to [link to relevant documentation]. Figure 2 The monofilament wrapped yarn 40 is then sequentially introduced into the front nip 111 of the front roller 105 via the tension compensation unit 106 and the first guide roller 101. The second filament 60 is then sequentially introduced into the front nip 111 of the front roller 105 via another tension compensation unit 106 and the second guide roller 102. The second filament 60 and the monofilament wrapped yarn 40 are then subjected to a second ring twisting process to obtain the blended yarn 70. By making the twisting directions of the first and second ring twisting processes different, a mesh-structured blended yarn 70 can be obtained.

[0061] During the process of first ring twisting and winding of short fiber yarn 80 and first filament 20 to form monofilament wrapped yarn 40, the pressure of the first filament 20 acting on the first pressure sensor 103 can be detected by the first pressure sensor 103. The magnitude of the pressure acting on the first pressure sensor 103 can indirectly reflect the tension of the first filament 20. The control unit 107 can control the tension compensation unit 106 to adjust the tension of the first filament 20 according to the pressure detection signal, so that the twisting triangle area 50 of the first ring twisting and winding maintains the shape of an isosceles triangle or approximately an isosceles triangle.

[0062] Specifically, when the pressure detected by the first pressure sensor 103 is too low, it indicates that the tension of the first filament 20 is too low. At this time, the tension compensation unit 106 can be controlled by the control unit 107 to adjust the tension of the first filament 20, increase the tension of the first filament 20, and keep the shape of the twisting triangle 50 as an isosceles triangle or an approximately isosceles triangle.

[0063] Similarly, during the process of forming a blended yarn 70 by second ring twisting and wrapping the monofilament wrapped yarn 40 and the second filament 60, the pressure exerted by the monofilament wrapped yarn 40 on the first pressure sensor 103 can be detected by the first pressure sensor 103, and the pressure exerted by the second filament 60 on the second pressure sensor 104 can be detected by the second pressure sensor 104. The magnitude of the pressure exerted on the pressure sensor can indirectly reflect the tension of the yarn. The control unit 107 can control the tension compensation unit 106 to adjust the tension of the second filament 60 and / or the monofilament wrapped yarn 40 according to the two pressure detection signals, so that the twisting triangle area 50 of the second ring twisting and wrapping maintains the shape of an isosceles triangle or an approximately isosceles triangle.

[0064] The blended yarn production apparatus 10 described above, through the cooperation of the first pressure sensor 103, the second pressure sensor 104, the tension compensation unit 106, and the control unit 107, can effectively improve the morphological stability of the twisting triangle region 50 during ring spinning and winding, so that the twisting triangle region 50 maintains the shape of an isosceles triangle or approximately an isosceles triangle, thereby improving the stability of blended yarn production 70, improving the yarn forming performance of blended yarn, and making the produced blended yarn high in strength, good in elongation, high in abrasion resistance, and soft in hand feel.

[0065] Specifically, by placing the first pressure sensor 103 and the second pressure sensor 104 in the grooves of the first guide roller 101 and the second guide roller 102 respectively, the yarn can be pressed on the first pressure sensor 103 and the second pressure sensor 104 during the production process, which can better detect the force of the yarn acting on the pressure sensor and better reflect the tension of the yarn.

[0066] Please see Figure 1 , Figure 2 and Figure 5In some embodiments, the tension compensation unit 106 includes a tension compensation mechanism 106a and a tension compensation drive mechanism 106b. The tension compensation mechanism 106a includes a fixed block 106a-1 and a movable block 106a-2. The movable block 106a-2 is mounted on the fixed block 106a-1 and is movable relative to the fixed block 106a-1. The fixed block 106a-1 has a first winding post 106a-3, and the movable block 106a-2 has a second winding post 106a-4. The first winding post 106a-3 and the second winding post 106a-4 are parallel to each other and staggered (i.e., the first winding post 106a-3 and the second winding post 106a-4 are parallel to each other and staggered). (The heights of the yarn posts 106a-4 are different). When the movable block 106a-2 moves relative to the fixed block 106a-1, it can change the distance between the first yarn post 106a-3 and the second yarn post 106a-4. The input end of the tension compensation drive mechanism 106b is connected to the output end of the control unit 107, and the output end of the tension compensation drive mechanism 106b is connected to the movable block 106a-2. The tension compensation drive mechanism 106b is used to drive the movable block 106a-2 to move relative to the fixed block 106a-1.

[0067] By setting the tension compensation unit 106 described above, during the production of blended yarn 70, the yarn is wound around the first winding post 106a-3 and the second winding post 106a-4 on the fixed block 106a-1 and the movable block 106a-2. Since the first winding post 106a-3 and the second winding post 106a-4 are staggered, and the movable block 106a-2 can move relative to the fixed block 106a-1, when it is necessary to adjust the yarn tension, the movable block 106a-2 is driven to move relative to the fixed block 106a-1 by the tension compensation drive mechanism 106b, thereby changing the distance between the first winding post 106a-3 and the second winding post 106a-4, and thus changing the yarn tension. Specifically, when the distance between the first winding post 106a-3 and the second winding post 106a-4 decreases, the yarn tension increases; when the distance between the first winding post 106a-3 and the second winding post 106a-4 increases, the yarn tension decreases. The tension compensation unit 106 allows for convenient adjustment of the yarn tension, thereby improving the shape of the twisting triangle 50.

[0068] In some embodiments, the fixed block 106a-1 and the movable block 106a-2 are slidably connected by the engagement of a groove and a protrusion. See also... Figure 5Specifically, a groove can be provided on the fixed block 106a-1, and a protrusion matching the groove can be provided on the movable block 106a-2. The protrusion is embedded into the groove to achieve a sliding connection between the movable block 106a-2 and the fixed block 106a-1. By driving the protrusion on the movable block 106a-2 to slide within the groove of the fixed block 106a-1 through the tension compensation drive mechanism 106b, the distance between the first yarn winding post 106a-3 and the second yarn winding post 106a-4 can be changed.

[0069] It is understandable that a groove can be provided on the movable block 106a-2, and a protrusion matching the groove can be provided on the fixed block 106a-1. The protrusion can be embedded into the groove of the movable block 106a-2 to achieve a sliding connection between the movable block 106a-2 and the fixed block 106a-1. Furthermore, the connection method between the fixed block 106a-1 and the movable block 106a-2 is not limited to the groove and protrusion matching method described above. Other existing movable connection methods can also be used, as long as the distance between the first yarn winding post 106a-3 and the second yarn winding post 106a-4 can be changed under the drive of the tension compensation drive mechanism 106b, and the movable block 106a-2 and the fixed block 106a-1 can be stably connected.

[0070] In some embodiments, the tension compensation drive mechanism 106b is a motor or a cylinder. The motor can be a linear motor; or a stepper motor coupled with a lead screw to achieve linear movement of the movable block 106a-2. It is understood that the specific structure of the tension compensation drive mechanism 106b is not limited to this, and other existing drive mechanisms capable of driving the movable block 106a-2 to slide relative to the fixed block 106a-1 are also acceptable.

[0071] In some embodiments, the control unit 107 includes a tension detector (not shown), a programmable controller 107a, and a drive controller (not shown). The outputs of the first pressure sensor 103 and the second pressure sensor 104 are both connected to the input of the tension detector. The output of the tension detector is connected to the input of the programmable controller 107a. The output of the programmable controller 107a is connected to the input of the drive controller, and the output of the drive controller is connected to the input of the tension compensation unit 106. Specifically, the output of the drive controller is connected to the input of the tension compensation drive mechanism 106b.

[0072] During the production of blended yarn 70, pressure sensors are used to detect the pressure of the monofilament wrapped yarn 40 and the second filament 60 respectively. The pressure detection signals are sent to the tension detector, and after a series of calculations, they are connected to the input terminal of the programmable controller 107a. The programmable controller 107a outputs control commands to the drive controller, which is connected to the tension compensation drive mechanism 106b. The drive controller controls the tension compensation drive mechanism 106b to compensate and adjust the tension of the corresponding yarn, thereby improving the shape of the twisting triangle zone 50 during spinning.

[0073] In some embodiments, the programmable controller 107a includes a central processing unit (CPU), memory, input interfaces, output interfaces, communication interfaces, and expansion interfaces. The control unit 107 also includes a human-machine interface (not shown), which is connected to the programmable controller 107a via an interface and is used to set the tension control mode and tension parameters according to the product process. The human-machine interface and the programmable controller 107a act as a host computer, used to determine whether tension adjustment is required.

[0074] Please see Figure 1 and Figure 2 In some embodiments, the blended yarn production apparatus 10 further includes a speed-regulating yarn guide rod 108a and a yarn guide rod drive mechanism 108b. The speed-regulating yarn guide rod 108a is located upstream of the tension compensation unit 106 along the yarn conveying direction. The speed-regulating yarn guide rod 108a is connected to the output end of the yarn guide rod drive mechanism 108b, and the input end of the yarn guide rod drive mechanism 108b is connected to the output end of the drive controller.

[0075] During the production of blended yarn 70, the yarn is wound around the speed-regulating guide rod 108a, which is connected to the output end of the guide rod drive mechanism 108b. The guide rod drive mechanism 108b can drive the speed-regulating guide rod 108a to rotate, and the yarn tension can be adjusted by regulating the rotational speed of the speed-regulating guide rod 108a. This configuration, in conjunction with the speed-regulating guide rod 108a and the guide rod drive mechanism 108b, and the tension compensation unit 106, allows for better adjustment of the yarn tension, improving the shape of the twisting triangle zone 50 and maintaining it as an isosceles triangle or approximately an isosceles triangle.

[0076] Specifically, the yarn guide rod drive mechanism 108b can be a motor, and the speed-regulating yarn guide rod 108a is connected to the motor shaft. Correspondingly, the drive controller connected to the yarn guide rod drive mechanism 108b can be a motor drive controller, used to adjust the speed of the motor, and thus adjust the speed of the speed-regulating yarn guide rod 108a.

[0077] In some specific examples, a pressure sensor detects the pressure on the yarn and sends the detected pressure value to a tension detector. The tension detector receives the pressure data from the pressure sensor, performs internal calculations, and outputs a 0-10V voltage signal to the programmable controller 107a. Based on the voltage signal from the tension detector, the programmable controller 107a outputs a corresponding frequency, which drives the motor to change its speed, causing the speed-regulating yarn guide rod 108a to operate at different speeds. It also controls the operation of the tension compensation unit 106, thus regulating the yarn tension. The changes in yarn tension are then detected by the pressure sensor, and this process repeats. The control flowchart of the blended yarn production device 10 is shown below. Figure 6 As shown.

[0078] Please see Figure 1 In some embodiments, the blended yarn production apparatus 10 further includes a staple fiber drafting mechanism, which includes a middle roller 109 and a rear roller 110. The middle roller 109 and the rear roller 110 are sequentially arranged upstream of the front roller 105 along the conveying direction of the staple fiber sliver 30. The middle roller 109 and the rear roller 110 are used to draft the staple fiber sliver 30 to form a staple fiber yarn 80 before introducing it into the front roller 105.

[0079] In some embodiments of the present invention, a method for producing blended yarn is provided, wherein blended yarn 70 is produced using the blended yarn production apparatus 10 described above, and the method includes the following steps S100 to S400:

[0080] Step S100: The first filament 20 is sequentially introduced into the front nip 111 of the front roller 105 through the tension compensation unit 106 and the first guide roller 101; the short fiber sliver 30 is drawn into short fiber yarn 80 and then introduced into the front nip 111 of the front roller 105.

[0081] Step S200: The first filament 20 and the short fiber yarn 80 are first ring-twisted and wrapped to obtain a monofilament wrapped yarn 40; during the first ring-twisting and wrapping process, the pressure of the first filament 20 acting on the first pressure sensor 103 is detected by the first pressure sensor 103, and the control unit 107 controls the tension compensation unit 106 to adjust the tension of the first filament 20 according to the pressure detection signal, so that the twisting triangle area 50 of the first ring-twisting and wrapping maintains the shape of an isosceles triangle or an approximately isosceles triangle.

[0082] Step S300: The obtained monofilament wrapped yarn 40 is sequentially introduced into the front jaw 111 of the front roller 105 through the tension compensation unit 106 and the first guide roller 101. The second filament 60 is sequentially introduced into the front jaw 111 of the front roller 105 through another tension compensation unit 106 and the second guide roller 102.

[0083] Step S400: The second filament 60 and the monofilament wrapped yarn 40 are subjected to a second ring twisting and wrapping to obtain a blended yarn 70; the twisting direction of the second ring twisting and wrapping is different from that of the first ring twisting and wrapping; during the second ring twisting and wrapping process, the pressure of the monofilament wrapped yarn 40 acting on the first pressure sensor 103 is detected by the first pressure sensor 103, and the pressure of the second filament 60 acting on the second pressure sensor 104 is detected by the second pressure sensor 104. The control unit 107 controls the tension compensation unit 106 to adjust the tension of the monofilament wrapped yarn 40 and / or the second filament 60 according to the above two pressure detection signals, so that the twisting triangle area 50 of the second ring twisting and wrapping maintains the shape of an isosceles triangle or an approximately isosceles triangle.

[0084] In the above-described blended yarn production method, during the first ring spinning twisting and winding process, the pressure of the first filament 20 acting on the first pressure sensor 103 is detected by the first pressure sensor 103. The control unit 107 controls the tension compensation unit 106 to adjust the tension of the first filament 20 according to the pressure detection signal. During the second ring spinning twisting and winding process, the pressure of the two yarns acting on the corresponding pressure sensors is detected by the first pressure sensor 103 and the second pressure sensor 104 respectively. The control unit 107 controls the corresponding tension compensation unit 106 to adjust the tension of the corresponding yarn according to the pressure detection signal. This effectively improves the shape of the twisting triangle 50, keeping it as an isosceles triangle or approximately an isosceles triangle, improving the stability of blended yarn production and enhancing the performance of the blended yarn. By employing a two-step composite spinning process involving first-ring twisting and second-ring twisting, the twisting directions of the second-ring twisting and first-ring twisting are different, resulting in a high-quality blended yarn 70 with a mesh structure. This reduces the doubling and twisting processes required in conventional production of mesh-structured yarns. A schematic diagram of the resulting blended yarn 70 is shown below. Figure 6 As shown.

[0085] In some embodiments, the twisting direction of the first ring twisting wrapping is the Z / S twist direction; the twisting direction of the second ring twisting wrapping is the S / Z twist direction.

[0086] In some embodiments, the short fiber sliver 30 is a sliver obtained by drafting, twisting, and winding short fibers through a roving process; the first filament 20 and the second filament 60 are chemical fiber filaments of the same denier. In some specific examples, the first filament 20 is on the left side of the short fiber yarn 80, with a spacing of 2.5mm to 3.5mm between them; the second filament 60 is on the right side of the monofilament wrapped yarn 40, with a spacing of 2.5mm to 3.5mm between them. The linear density of the first filament 20 and the second filament 60 is 44 dtex; the linear density of the monofilament wrapped yarn 40 is 10 tex to 12.5 tex; and the linear density of the blended yarn 70 is 14 tex to 16.5 tex.

[0087] In some embodiments, before the first filament 20 is introduced into the first guide roller 101, the first filament 20 is bypassed by the speed-regulating guide rod 108a; the short fiber sliver 30 is sequentially drawn through the back roller 110 and the middle roller 109 to form a short fiber yarn 80 and then introduced into the front nip 111 of the front roller 105; during the first ring twisting and wrapping process, the control unit 107 adjusts the tension of the first filament 20 by controlling the rotation speed of the speed-regulating guide rod 108a according to the pressure detection signal, so that the twisting triangle 50 of the first ring twisting and wrapping maintains the shape of an isosceles triangle or an approximately isosceles triangle.

[0088] By controlling the rotational speed of the speed-regulating yarn guide 108a through the yarn guide drive mechanism 108b, the tension of the first filament 20 can be adjusted. Thus, through the cooperation of the speed-regulating yarn guide 108a and the yarn guide drive mechanism 108b with the tension compensation unit 106, the tension of the first filament 20 can be better adjusted during the first ring spinning and twisting process, thereby improving the shape of the twisting triangle 50 and maintaining it as an isosceles triangle or approximately an isosceles triangle.

[0089] In some embodiments, before the monofilament wrapped yarn 40 is introduced into the first guide roller 101, the monofilament wrapped yarn 40 is bypassed by the speed-regulating guide rod 108a; before the second filament 60 is introduced into the second guide roller 102, the second filament 60 is bypassed by another speed-regulating guide rod 108a; during the second ring twisting and wrapping process, the control unit 107 adjusts the tension of the monofilament wrapped yarn 40 and / or the second filament 60 by controlling the rotation speed of the speed-regulating guide rod 108a according to the pressure detection signal, so that the twisting triangle area 50 of the second ring twisting and wrapping maintains the shape of an isosceles triangle or approximately an isosceles triangle.

[0090] By controlling the rotational speed of the speed-regulating yarn guide 108a through the yarn guide drive mechanism 108b, the tension of the monofilament wrapped yarn 40 and / or the second filament 60 can be adjusted. Thus, through the cooperation of the speed-regulating yarn guide 108a and the yarn guide drive mechanism 108b with the tension compensation unit 106, the tension of the yarn can be better adjusted during the second ring spinning twisting and wrapping process, thus better improving the shape of the twisting triangle 50 and maintaining it as an isosceles triangle or approximately an isosceles triangle.

[0091] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims, and the specification and drawings can be used to interpret the content of the claims.

Claims

1. A method for producing blended yarn, characterized in that, The blended yarn production device is used for production, and the blended yarn production device includes a first guide roller, a second guide roller, a first pressure sensor, a second pressure sensor, a front roller, a tension compensation unit, and a control unit. The first guide wheel and the second guide wheel are arranged side by side, and the first pressure sensor and the second pressure sensor are respectively disposed in the grooves of the first guide wheel and the second guide wheel; The front roller is located downstream of the first guide roller and the second guide roller along the yarn conveying direction; The tension compensation unit is located upstream of the first guide roller and / or the second guide roller along the yarn feeding direction. The tension compensation unit is used to adjust the tension of the yarn on the first guide roller or the second guide roller. The output terminals of the first pressure sensor and the second pressure sensor are both connected to the input terminal of the control unit, and the output terminal of the control unit is connected to the input terminal of the tension compensation unit. The control unit is used to control the tension compensation unit to adjust the tension of the yarn according to the detection signals of the first pressure sensor and the second pressure sensor. The method for producing blended yarn includes the following steps: The first filament is sequentially introduced into the front nip of the front roller through the tension compensation unit and the first guide roller. The short fiber sliver is drawn into short fiber yarn and then introduced into the front nip of the front roller. The first filament and the short fiber yarn are then subjected to the first ring twisting and wrapping to obtain monofilament wrapped yarn. During the first ring twisting and wrapping process, the pressure of the first filament acting on the first pressure sensor is detected by the first pressure sensor. The control unit controls the tension compensation unit to adjust the tension of the first filament according to the pressure detection signal so that the twisting triangle area of ​​the first ring twisting and wrapping maintains the shape of an isosceles triangle or approximately an isosceles triangle. The prepared monofilament wrapped yarn is sequentially introduced into the front nip of the front roller through a tension compensation unit and a first guide roller. The second filament is sequentially introduced into the front nip of the front roller through another tension compensation unit and a second guide roller. The second filament and the monofilament wrapped yarn are then subjected to a second ring twisting and wrapping process to obtain a blended yarn. The twisting directions of the second ring twisting and wrapping process and the first ring twisting and wrapping process are different. During the second ring twisting and wrapping process, the pressure of the monofilament wrapped yarn acting on the first pressure sensor is detected by a first pressure sensor, and the pressure of the second filament acting on the second pressure sensor is detected by a second pressure sensor. The control unit controls the tension compensation unit to adjust the tension of the monofilament wrapped yarn and / or the second filament based on the two pressure detection signals, so that the twisting triangle area of ​​the second ring twisting and wrapping process maintains the shape of an isosceles triangle or approximately an isosceles triangle.

2. The method for producing blended yarn according to claim 1, characterized in that, The tension compensation unit includes a tension compensation mechanism and a tension compensation drive mechanism; The tension compensation mechanism includes a fixed block and a movable block. The movable block is mounted on the fixed block and can move relative to the fixed block. The fixed block is provided with a first yarn winding post, and the movable block is provided with a second yarn winding post. The first yarn winding post and the second yarn winding post are staggered. When the movable block moves relative to the fixed block, it can change the distance between the first yarn winding post and the second yarn winding post. The input end of the tension compensation drive mechanism is connected to the output end of the control unit, and the output end of the tension compensation drive mechanism is connected to the movable block. The tension compensation drive mechanism is used to drive the movable block to move relative to the fixed block.

3. The method for producing blended yarn according to claim 1 or 2, characterized in that, The control unit includes a tension detector, a programmable controller, and a drive controller. The output terminals of the first pressure sensor and the second pressure sensor are both connected to the input terminal of the tension detector. The output terminal of the tension detector is connected to the input terminal of the programmable controller. The output terminal of the programmable controller is connected to the input terminal of the drive controller. The output terminal of the drive controller is connected to the input terminal of the tension compensation unit.

4. The method for producing blended yarn according to claim 3, characterized in that, The blended yarn production device further includes a speed-regulating yarn guide rod and a yarn guide rod drive mechanism. The speed-regulating yarn guide rod is located upstream of the tension compensation unit along the yarn conveying direction. The speed-regulating yarn guide rod is connected to the output end of the yarn guide rod drive mechanism, and the input end of the yarn guide rod drive mechanism is connected to the output end of the drive controller.

5. The method for producing blended yarn according to any one of claims 1, 2, and 4, characterized in that, The blended yarn production device also includes a short fiber drafting mechanism, which includes a middle roller and a rear roller, and the middle roller and the rear roller are sequentially located upstream of the front roller along the short fiber sliver conveying direction.

6. The method for producing blended yarn according to any one of claims 1, 2, and 4, characterized in that, Before the first filament is introduced into the first guide wheel, the first filament is passed around the speed-regulating guide rod; during the first ring twisting and wrapping process, the control unit adjusts the tension of the first filament by controlling the speed of the speed-regulating guide rod according to the pressure detection signal, so that the twisting triangle area of ​​the first ring twisting and wrapping maintains the shape of an isosceles triangle or an approximately isosceles triangle.

7. The method for producing blended yarn according to any one of claims 1, 2, and 4, characterized in that, Before the monofilament wrapping yarn is introduced into the first guide roller, the monofilament wrapping yarn is passed around the speed-regulating guide rod; before the second filament is introduced into the second guide roller, the second filament is passed around another speed-regulating guide rod; during the second ring twisting and wrapping process, the control unit adjusts the tension of the monofilament wrapping yarn and / or the second filament by controlling the rotation speed of the speed-regulating guide rod according to the pressure detection signal, so that the twisting triangle area of ​​the second ring twisting and wrapping maintains the shape of an isosceles triangle or approximately an isosceles triangle.

8. A blended yarn, characterized in that, The blended yarn is produced by the blended yarn production method according to any one of claims 1 to 7.

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