Double-adjustment wire guiding device for network fibers and wire guiding method

Abstract

The invention relates to a double-adjustment yarn guiding device for network fibers and a yarn guiding method, and belongs to the technical field of spinning equipment. The fixer is connected to one side surface of the mounting base and is used for connecting the mounting base to a spinning complete machine; the yarn guide assembly is connected to the other side face of the mounting base and comprises a yarn guide wheel set and a guide roller set, and the yarn guide wheel set is arranged above the guide roller set and used for adjusting the yarn outlet angle of the yarn outlet end of the buncher; and the guide roller group is used for adjusting the running tension of the tows. According to the double-adjustment yarn guiding device and method, through collaborative optimization of the yarn outlet angle and the operation tension, a stable and controllable environment is created for fibers in network airflow, in the environment, yarn bundles can keep moderate opening so as to be beneficial to entanglement, a stable track can be maintained so as to restrain abnormal vibration, and the yarn guiding effect is improved. Therefore, the prepared meta-aramid interlaced yarn is high in interlacing degree, uniform in node and good in interlacing fastness.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spinning equipment, in particular to a double-adjusting yarn guide device for network fibers and a yarn guiding method. BACKGROUND

[0002] Metaphenylene isophthalamide filament is a functional product of high-performance aramid fiber, which is widely used in the fields of aviation high-temperature sleeves and high-temperature binding tapes. In recent years, in order to meet the needs of the field of special aviation equipment, a differentiated metaphenylene isophthalamide filament (hereinafter referred to as "metaphenylene isophthalamide network filament") has been developed. In addition to the inherent properties of metaphenylene isophthalamide, the metaphenylene isophthalamide network filament can be chemically combined with water-soluble surface modifiers due to its special surface structure, realizing functional expansion in the field and further broadening the application field of metaphenylene isophthalamide filament.

[0003] The key to the production of metaphenylene isophthalamide network filament lies in the network degree and network firmness of the fiber. In the traditional spinning process route of metaphenylene isophthalamide network filament, the fiber is directly drawn and wound by a guide roller after passing through a bundling device. In this process, the bundling device usually introduces inert gas at a certain pressure to promote the formation of fiber network. However, the fiber is prone to violent vibration under the action of high-pressure gas flow, resulting in unstable yarn tension, difficulty in maintaining a stable network node formation environment, and further causing uneven distribution of network points and insufficient firmness.

[0004] In addition, the tension control of the yarn during the network process is easily ignored. If the tension is too high, the vibration of the yarn under the blow of high-pressure gas will be reduced, which will lead to a decrease in the opening and rotation degree of the yarn, and a decrease in the cohesion of the fiber, thereby reducing the network degree and firmness of the network filament. If the yarn tension is too low, the vibration of the yarn will be intensified, which will easily deviate from the center position of the gas flow, resulting in uneven yarn network, and even no network points, so that the fiber is dispersed without bundling and cohesion, and the network degree and firmness of the network filament are reduced.

[0005] Therefore, there is an urgent need for a yarn guide device and method that can synchronously adjust the yarn tension and the yarn angle, and can stabilize the running trajectory of the yarn, in order to improve the production quality of metaphenylene isophthalamide network filament. SUMMARY

[0006] The present application aims to provide a double-adjusting yarn guide device for network fibers and a yarn guiding method, which can solve the technical problems mentioned in the background.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions: The first aspect of the present application provides a double-adjusting yarn guide device for network fibers, comprising a mounting base, a fixer and a yarn guide assembly, the fixer is connected to one side of the mounting base and used to connect the mounting base to a spinning machine; the yarn guide assembly is connected to the other side of the mounting base and comprises a yarn guide wheel set and a guide roller set, the yarn guide wheel set is arranged above the guide roller set and used to adjust the yarn angle of the yarn bundle at the yarn outlet end of a collector, and the guide roller set is used to adjust the running tension of the yarn bundle.

[0008] In a preferred embodiment, the fixer comprises a mounting plate fixedly connected to the side of the mounting base and a fixing cylinder connected to the outer side of the mounting plate, and the side wall of the fixing cylinder is connected with a fastener.

[0009] In a preferred embodiment, the yarn guide wheel set comprises an adjuster connected to the mounting base and a yarn guide wheel body connected to the adjuster and rotatable, and the adjuster is configured to adjust the distance of the yarn guide wheel body relative to the mounting base in the horizontal direction to change the yarn angle of the yarn bundle.

[0010] In a preferred embodiment, the adjuster is a linear adjustment structure with self-locking function.

[0011] In a preferred embodiment, the guide roller set comprises a driven guide roller and a driving guide roller arranged below the driven guide roller, and the driven guide roller is offset by a preset angle relative to the driving guide roller.

[0012] In a preferred embodiment, the offset angle of the driven guide roller relative to the driving guide roller in the guide roller set can be adjusted within a preset range.

[0013] In a preferred embodiment, the mounting base and the fixer are connected through an arc-shaped mounting hole and a locking structure, and the offset angle of the driven guide roller is changed by adjusting the rotation angle of the mounting base around the arc-shaped mounting hole.

[0014] In a preferred embodiment, the central angle corresponding to the arc-shaped mounting hole is less than 30°.

[0015] The second aspect of the present application provides a yarn guiding method using the double-adjusting yarn guide device, comprising the following steps: mounting the double-adjusting yarn guide device below the yarn outlet of the collector; adjusting the offset angle of the driven guide roller in the guide roller set and the roller speed ratio to adjust the yarn tension; adjusting the position of the yarn guide wheel body in the yarn guide wheel set to adjust the yarn angle of the yarn bundle; guiding the yarn bundle through the yarn guide wheel body, the driven guide roller and the driving guide roller in sequence for production.

[0016] In a preferred embodiment, the position of the guide roller body is adjusted so that the fiber bundle has an outflow angle of 15±1°, and / or the roller speed ratio is adjusted so that the fiber bundle has a running tension of 15±2 cN.

[0017] Compared with the prior art, the present application has the following advantages: The present application can simultaneously adjust the fiber network degree and network firmness by adding a double-adjusting guide device after the special fiber bundling device. Specifically, the fiber network degree is ensured by adjusting the outflow angle of the fiber bundle after the bundling device to control the opening of the fiber bundle and the rotation degree of the fiber, and the problems of hair and broken fiber caused by the network process are solved by adjusting the distance between the fiber bundles by adjusting the angle between the driven guide roller and the driving guide roller and by adjusting the fiber bundle tension at the outlet end of the bundling device by controlling the roller speed ratio, thereby reducing the shaking frequency of the fiber when passing through the high-pressure airflow, adjusting the fiber network firmness, and achieving the best network effect. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 1 is a schematic diagram of the overall structure of the double-adjusting guide device in the embodiment of the present application; Figure 2 Fig. 2 is a front view of the double-adjusting guide device in the embodiment of the present application; Figure 3 Fig. 3 is a right view of the double-adjusting guide device in the embodiment of the present application; Figure 4 Fig. 4 is a schematic diagram of the operation path of the fiber bundle in the embodiment of the present application; Figure 5 Fig. 5 is a schematic diagram of the structure of the guide roller set in the embodiment of the present application.

[0019] Fig. 1 is a schematic diagram of the overall structure of the double-adjusting guide device in the embodiment of the present application; 1, mounting base; 11, arc-shaped mounting hole; 12, locking structure; 2, fixator; 21, mounting plate; 22, fixing cylinder; 23, fastener; 3, guide assembly; 31, guide roller set; 311, adjuster; 312, guide roller body; 32, guide roller set; 321, extension plate; 322, roller shaft; 323, driven guide roller; 324, driving guide roller; 4, bundling device. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0022] The embodiment discloses a double-adjusting yarn guide device for network fibers, which is arranged in the downstream link of the collector 4, and aims to cooperatively adjust the yarn angle, the yarn spacing and the running tension of the yarn bundle, so as to stabilize the state of the fibers in the network nozzle high-pressure gas flow.

[0023] Referring to Figures 1-3 , the yarn guide device comprises a mounting base 1 in a plate-shaped structure, which is vertically arranged, one side surface of which is fixedly connected with a fixing device 2, and the other side surface of which is fixedly connected with a yarn guide assembly 3.

[0024] The fixing device 2 further comprises a mounting plate 21 fixedly connected with the side surface of the mounting base 1 and a fixing cylinder 22 fixedly arranged on the outer side surface of the mounting plate 21. Figure 1 The fixing cylinder 22 is configured in a cylindrical structure, and the axis thereof is horizontally arranged, for cooperating with the shaft-shaped fixing device (not shown in the figure) equipped in the whole spinning machine. In actual installation, the fixing cylinder 22 is sleeved on the shaft-shaped fixing device, so that the preliminary positioning of the whole yarn guide device can be realized. Preferably, the outer side wall of the fixing cylinder 22 is further connected with a fastener 23, such as a top wire or a screw, and the fixing cylinder 22 can be firmly locked on the shaft-shaped fixing device by screwing the fastener 23, so as to prevent displacement during operation. Meanwhile, the axial position of the fixing cylinder 22 can be adjusted by loosening the fastener 23, so as to ensure that the yarn guide assembly 3 thereon is accurately corresponding to the yarn outlet of the collector 4.

[0025] The yarn guide assembly 3 comprises a yarn guide wheel set 31 fixedly connected with the other side surface of the mounting base 1 and a guide roller set 32, the yarn guide wheel set 31 is arranged at the upper end position of the mounting base 1, for adjusting the yarn angle of the yarn bundle at the yarn outlet end of the collector 4, and further controlling the opening degree and the rotating state of the fibers in the network gas flow, so as to control the network firmness of the fibers; the guide roller set 32 is arranged at the lower end position of the mounting base 1, and corresponds to the position of the yarn guide wheel set 31 above, for adjusting the yarn spacing and the yarn tension of the yarn bundle in the collector 4, and further controlling the network firmness and the network degree of the fibers.

[0026] Specifically, Figure 1 and Figure 2As shown, the guide roller assembly 31 includes an adjuster 311 fixedly connected to the mounting base 1 and a guide roller body 312 connected to the adjuster 311. The adjuster 311 is used to adjust the horizontal distance of the guide roller body 312 relative to the mounting base 1, allowing it to move closer to or further away from the mounting base 1. In practical applications, the bundle collector 4 is placed above the front side of the guide roller body 312 (i.e., corresponding to the side of the guide roller body 312 away from the mounting base 1). After the filaments exit through the bundle collector 4, they do not descend directly, but first contact and bypass the curved surface of the guide roller body 312 before entering the guide roller assembly 32. By adjusting the distance between the guide roller body 312 and the mounting base 1 (equivalent to adjusting the horizontal distance between the guide roller body 312 and the outlet of the bundle collector 4), the exit angle of the filaments can be adjusted. By adjusting the exit angle, the opening and closing of the filaments and the degree of filament rotation can be controlled, ensuring the fiber network density. It should be noted that the optimal effect is achieved when the filament exit angle (the acute angle formed by the line connecting the filament exit point of the bundler 4 to the corresponding side of the guide wheel body 312 and the axis of the bundler 4) is controlled at 15±1°. At this angle, the filament bundle maintains a moderate degree of openness when entering the high-pressure network airflow zone below, which facilitates fiber entanglement and ensures network integrity. This avoids excessive looseness and vibration caused by an excessively small angle, while also preventing excessive tension and poor fiber cohesion caused by an excessively large angle. The bearing-equipped guide wheel body 312 ensures low-friction rotation, preventing wear on the filament bundle.

[0027] The adjuster 311 can employ a linear adjustment and locking structure found in existing technologies, such as a telescopic rod structure with a self-locking function, or a nested inner and outer cylinder structure locked by set screws. In one specific embodiment, the adjuster 311 includes a cylindrical sleeve fixedly connected to the mounting base 1 and an adjusting rod movably inserted into the cylindrical sleeve. The axis of the cylindrical sleeve is perpendicular to the plane of the mounting base 1, and the center of the cylindrical sleeve has axially distributed hollows. The adjusting rod is constructed in an L-shape, with one end inserted into the hollow of the cylindrical sleeve and the other end connected to a rotatable guide wheel body 312 via a bearing. Multiple set screws are connected to the side wall of the cylindrical sleeve to facilitate the adjustment and tightening of the adjusting rod.

[0028] like Figure 2 and Figure 3 As shown, the guide roller assembly 32 includes a roller shaft 322 fixedly connected to the other side of the mounting base 1 via two extension plates 321, a follower guide roller 323 rotatably connected to the roller shaft 322, and an active guide roller 324 disposed below the follower guide roller 323. The active guide roller 324 is driven to rotate by an external drive structure (such as a motor), and the follower guide roller 323 rotates synchronously through the transmission of the yarn bundle wound on both, providing a stable traction force for the yarn bundle. In this embodiment, the follower guide roller 323 corresponds to the area below the guide roller body 312.

[0029] Further, see Figure 5 In this embodiment, the follower guide roller 323 and the active guide roller 324 are not parallel. The follower guide roller 323 is offset relative to the active guide roller 324 by a certain angle, and this angle can be adjusted within a preset range. In practical applications, the offset angle of the follower guide roller 323 is adjusted according to the distribution of fiber network nodes or the adaptability of different fiber specifications, thereby controlling the filament spacing on the guide roller group 32 to avoid fuzzing caused by static electricity and friction. Then, by controlling the speed of the active guide roller 324, the follower guide roller 323 is driven to adjust the filament tension and stabilize the filament tension in the optimal range of 15±2cN. Stable tension can effectively suppress the violent vibration generated when the filament passes through the high-pressure airflow, prevent it from deviating from the airflow center, and ensure that each monofilament can be fully and evenly opened and intertwined in the airflow, thereby forming a network structure with firm nodes and uniform distribution.

[0030] In one specific implementation, such as Figure 2 As shown, the mounting base 1 has an arc-shaped mounting hole 11, and the mounting plate 21 of the fixture 2 has a corresponding circular mounting hole. By connecting the locking structure 12, such as screws, to the arc-shaped mounting hole 11 and the circular mounting hole, the mounting base 1 and the fixture 2 can be fixedly connected. When the screws are loosened, the mounting base 1 and the entire guide roller assembly 32 fixed on it can rotate around the connection point within a certain angle range. After adjusting the angle, the screws are tightened again. In this embodiment, the central angle corresponding to the arc-shaped mounting hole 11 is preferably less than 30° (greater than 0°), so that the offset angle of the follower guide roller 323 can be continuously adjusted within a preset range.

[0031] Based on the dual-adjustment guide wire device for network fibers provided in the above embodiments, the present invention also discloses a guide wire method, combined with Figure 4 and Figure 5 The guidewire method includes the following steps: Step 1, Device Installation and Preliminary Positioning: Install the network fiber using the double-adjustable guide device on the spinning machine through its retainer 2, and adjust its axial position so that the guide wheel group 31 and guide roller group 32 on the device are located below the fiber outlet of the bundler 4. Step 2, filament spacing and tension adjustment: Adjust the installation angle of the mounting base 1 and the follower guide roller 323 on it through the arc mounting hole 11, that is, adjust the offset angle α to make the filament spacing appropriate, then adjust the roller speed ratio to make the tension at the filament outlet end of the bundle collector 4 reach 15±2cN, and tighten the screw. Step 3, adjusting the wire exit angle: Adjust the horizontal distance between the wire guide wheel body 312 and the wire exit port of the bundler 4 so that the acute angle β formed by the line connecting the wire exit point of the bundler 4 to the corresponding side of the wire guide wheel body 312 and the axis of the bundler 4 is 15±1°, that is, the wire exit angle of the bundler 4 reaches 15±1°. Step 4, introduce the filament bundle and start production: The filament bundle is introduced into the filament guide device from the filament outlet of the bundler 4. The filament bundle passes around the guide wheel body 312, the follower guide roller 323 and the drive guide roller 324 in sequence, and after being wound around the follower guide roller 323 and the drive guide roller 324 a certain number of times, it enters the subsequent process for production.

[0032] The guidewire method provided by the present invention will be further described in detail below with reference to embodiments. It should also be understood that the following embodiments are only for further illustration of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-essential improvements and adjustments made by those skilled in the art based on the above description of the present invention are within the scope of protection of the present invention. The specific process parameters, etc., in the following examples are merely examples within a suitable range; that is, those skilled in the art can make appropriate selections within the appropriate range based on the description herein, and are not intended to be limited to the specific values ​​in the examples below.

[0033] Example 1 This embodiment provides a wire guiding method based on a dual-adjustment guide wire device for network fibers, including the following steps: Step 1, Device Installation and Preliminary Positioning: Install the wire guide device below the wire outlet of the 200D specification bundler 4 by adjusting the position of the retainer 2; Step 2, filament spacing and tension adjustment: Adjust the installation angle of the mounting base 1 and the follower guide roller 323 on it through the arc mounting hole 11 to adjust the filament spacing to 6-8mm, set the speed ratio of the active guide roller 324 to 0.992, and drive the follower guide roller 323 to control the tension at the filament outlet end of the bundle collector 4 to 15±2cN; Step 3, adjusting the filament exit angle: Adjust the horizontal distance between the guide wheel body 312 and the bundle collector 4 to adjust the filament exit angle of the bundle at the outlet end of the bundle collector 4 to 15±1°. Step 4, introduce the filament bundle and start production: The meta-aramid 200D natural white filament is produced by wet spinning. The meta-aramid filament bundle is introduced into the guide device from the outlet of the bundler 4. The filament bundle passes through the guide wheel body 312, the follower guide roller 323 and the drive guide roller 324 in sequence. After being wound around the follower guide roller 323 and the drive guide roller 324 a certain number of times, it enters the subsequent process for production.

[0034] In this embodiment, after the fiber bundle is fed into the bundle collector 4 and connected to the fiber guide device for 2 minutes, the network nodes generated on the fiber surface are continuous, stable, uniform, and free of fuzz. Five groups of 1-meter-long fiber bundles are tested for fiber network density and network strength using the water bath method. Each 1-meter fiber bundle contains 11 to 13 uniform network nodes with a node length of about 1 mm. The network nodes do not disperse in water and can be introduced into subsequent processes. No fiber breakage occurs during subsequent normal production.

[0035] Example 2 This embodiment provides a wire guiding method based on a dual-adjustment guide wire device for network fibers, including the following steps: Step 1, Device Installation and Preliminary Positioning: Install the wire guide device at the wire outlet position of the 1200D specification bundler 4 by adjusting the position of the retainer 2; Step 2, filament spacing and tension adjustment: Adjust the installation angle of the mounting base 1 and the follower guide roller 323 on it through the arc mounting hole 11 to adjust the filament spacing to 3-5mm, set the speed ratio of the active guide roller 324 to 0.992, and drive the follower guide roller 323 to control the tension at the filament outlet end of the bundle collector 4 to 15±2cN; Step 3, adjusting the filament exit angle: Adjust the horizontal distance between the guide wheel body 312 and the bundle collector 4 so that the filament exit angle at the outlet end of the bundle collector 4 reaches 15±1°. Step 4, introduce the filament bundle and start production: The meta-aramid 1200D natural white filament is produced by wet spinning. The meta-aramid filament bundle is introduced into the guide device from the outlet of the bundler 4. The filament bundle passes through the guide wheel body 312, the follower guide roller 323 and the drive guide roller 324 in sequence. After being wound around the follower guide roller 323 and the drive guide roller 324 a certain number of times, it enters the subsequent process for production.

[0036] In this embodiment, after the fiber bundle is introduced into the bundle collector 4 and connected to the fiber guide device for 2 minutes, the network nodes generated on the fiber surface are continuous, stable, uniform, and free of fuzz. Five groups of 1-meter-long fiber bundles were tested for fiber network density and network strength using a water bath method. Each 1-meter fiber bundle contained 15-18 uniform network nodes, with a node length of approximately 1 mm, and the network nodes did not disperse in water. This can be incorporated into subsequent processes, and no fiber breakage occurred during subsequent normal production.

[0037] Comparative Example 1 The comparative example is roughly the same as the guide method in Example 1. The difference is that in step two, by setting the speed ratio of the active guide roller 324 to 0.898, the follower guide roller 323 is driven to control the tension at the outlet end of the bundle of the bundle in the bundle collector 4 to be 8±2cN.

[0038] In this comparative example, the fiber tension was too low, resulting in excessive vibration amplitude in the network airflow. Although network points could be formed, the fiber bundle was prone to shaking and deviation. After the fiber bundle was introduced into the bundle collector 4 and connected to the fiber guide device for 2 minutes, the network nodes generated on the fiber surface were continuous, stable, uniform, and free of fuzz. Five groups of 1-meter-long fiber bundles were tested for fiber network density and network strength using the water bath method. Each 1-meter fiber bundle contained 5-8 uniform network nodes with a node length of approximately 5mm. The network nodes did not disperse in water, but the excessive length of the network nodes caused the fiber to be embedded, resulting in a fiber breaking strength of <3.6 cN / dtex, making it unsuitable for subsequent production processes.

[0039] Comparative Example 2 The comparative example is roughly the same as the guide method in Example 1. The difference is that in step two, the speed ratio of the active guide roller 324 is set to 0.996, which drives the follower guide roller 323 to control the tension at the outlet end of the bundle of the bundle in the bundle collector 4 to be 30±2cN.

[0040] In this comparative example, the fiber bundle tension was too high, resulting in excessive tension and almost no vibration or loosening in the network airflow, preventing effective entanglement between fibers. After the fiber bundle was introduced into the bundle collector 4 and connected to the fiber guide device for 2 minutes, the network nodes on the fiber surface were loose and had severe fuzz. Five groups of 1-meter-long fiber bundles were tested using the water bath method to examine the fiber network density and network strength. Each 1-meter fiber bundle contained 3 to 5 uneven network nodes, indicating low network strength and easy disintegration in water. The fiber breaking strength was <3.6 cN / dtex, with poor bundle cohesion and severe fuzz, making it unsuitable for subsequent production processes.

[0041] Comparative Example 3 The comparative example is roughly the same as the wire guiding method in Example 1. The difference is that in step three, the horizontal distance between the wire guide wheel body 312 and the bundle collector 4 is adjusted to adjust the wire exit angle of the bundle at the outlet end of the bundle collector 4 to 5±1°.

[0042] In this comparative example, the filament exit angle was too small, causing the filament bundle to descend almost vertically, resulting in insufficient directional change after contact with the guide wheel. This led to the filament bundle being too loose and lacking cohesion when entering the airflow zone, with insufficient interaction between fibers, making it difficult to form effective network nodes. Specifically, after the filament bundle was introduced into the bundle collector 4 and connected to the guide device for 2 minutes, no obvious network nodes were generated on the fiber surface. The fibers were loose and had severe fuzz. Five groups of 1-meter-long filament bundles were tested for fiber network density and network strength using the water bath method. Each 1-meter filament bundle contained 3-5 uneven network nodes. The nodes lacked strength and easily dispersed in water. The fibers lacked cohesion, the breaking strength was <3.6 cN / dtex, and the fuzz was severe, making it unsuitable for subsequent production processes.

[0043] Comparative Example 4 The comparative example is roughly the same as the wire guiding method in Example 1. The difference is that in step three, the horizontal distance between the wire guide wheel body 312 and the bundle collector 4 is adjusted to adjust the wire exit angle of the bundle at the outlet end of the bundle collector 4 to 30±1°.

[0044] In this comparative example, the excessively large exit angle caused the fiber bundle to be over-guided and stretched. Although there were some network points, the fiber orientation was too parallel, resulting in insufficient opening and low entanglement efficiency. After the fiber bundle was introduced into the bundle collector 4 and connected to the fiber guide device for 2 minutes, network nodes were generated on the fiber surface. Five groups of 1-meter-long fiber bundles were tested for fiber network density and network strength using the water bath method. Each 1-meter fiber bundle contained 5 to 8 uneven network nodes, with a node length of about 6 mm. These nodes did not easily disperse in water, but the excessive length of the network nodes caused the fiber to be buried. The fiber breaking strength was <3.6 cN / dtex, making it unsuitable for subsequent production processes.

[0045] Comparative Example 5 The spinning method provided in this comparative example does not use a yarn guide device. The yarn bundle is directly introduced into the subsequent production process from the outlet end of the 200D specification bundle collector 4 through the guide roller. The yarn bundle is in a completely disordered and violently vibrating state in the airflow. Five groups of 1-meter-long yarn bundles were taken for water bath method to test the fiber network degree and network strength. The 1-meter yarn bundle contained 3 to 5 uneven network nodes, and the node length was unevenly distributed in the range of 1 to 5 mm. The fiber bundle had poor bundleness and a lot of fuzz. The broken strength of the produced fiber was <3.6 cN / dtex and the stability was poor. The fuzz was serious, and it was a substandard or ungraded product.

[0046] Comparisons of Examples 1 and 2 with comparative examples show that without a dual-adjustment guide device, fibers cannot be stably and uniformly entangled within the bundler 4, resulting in the formation of uniformly strong network nodes. The different installation positions of the guide roller body 312 and the follower guide roller 323 significantly impact the network strength and density of the filament bundle network nodes during production, as well as the stability of subsequent production. Different specifications of network yarns can be produced by controlling the bundle spacing. Comparisons reveal that when the bundle tension at the exit end of the bundler 4 is 13-17 cN and the exit angle is 14-16°, meta-aramid network yarns with uniform network density and high network strength can be continuously produced.

[0047] The dual-adjustment guide device and method provided by the present invention creates a stable and controllable environment for the fiber in the network airflow through the coordinated optimization of the fiber exit angle and the running tension. Under this environment, the fiber bundle can maintain a moderate openness to facilitate entanglement (angle control) and maintain a stable trajectory to suppress abnormal vibration (tension control), thereby making the prepared meta-aramid network yarn have high network density, uniform knots and good network strength.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual-adjustable guide wire device for network fibers, characterized in that, include: Mounting base; A fastener is attached to one side of the mounting base for connecting the mounting base to the spinning machine. The guide assembly, connected to the other side of the mounting base, includes a guide wheel group and a guide roller group. The guide wheel group is located above the guide roller group and is used to adjust the exit angle of the filament bundle at the exit end of the bundle collector. The guide roller group is used to adjust the running tension of the filament bundle.

2. The dual-adjustable guide wire device for network fibers according to claim 1, characterized in that, The fixture includes a mounting plate fixedly connected to the side of the mounting base and a fixing cylinder connected to the outer side of the mounting plate, wherein fasteners are connected to the side wall of the fixing cylinder.

3. The dual-adjustable guide wire device for network fibers according to claim 1, characterized in that, The guide wheel assembly includes an adjuster connected to the mounting base and a rotatable guide wheel body connected thereto. The adjuster is configured to adjust the distance of the guide wheel body in the horizontal direction relative to the mounting base to change the exit angle of the filament bundle.

4. The dual-adjustable guide wire device for network fibers according to claim 3, characterized in that, The regulator is a linear regulating structure with a self-locking function.

5. The dual-adjustable guide wire device for network fibers according to claim 1, characterized in that, The guide roller assembly includes a follower guide roller and an active guide roller disposed below it, wherein the follower guide roller is offset relative to the active guide roller by a preset angle.

6. The dual-adjustable guide wire device for network fibers according to claim 5, characterized in that, The offset angle of the follower guide roller relative to the active guide roller in the guide roller group can be adjusted within a preset range.

7. The dual-adjustable guide wire device for network fibers according to claim 6, characterized in that, The mounting base and the fixing device are connected by an arc-shaped mounting hole and a locking structure. By adjusting the rotation angle of the mounting base around the arc-shaped mounting hole, the offset angle of the follower guide roller can be changed.

8. The dual-adjustable guide wire device for network fibers according to claim 7, characterized in that, The central angle corresponding to the arc-shaped mounting hole is less than 30°.

9. A method for guiding a wire using the dual-adjustment guidewire device as described in any one of claims 1 to 8, characterized in that, Includes the following steps: The dual-adjustment guide wire device is installed below the wire outlet of the bundler; Adjust the offset angle and roller speed ratio of the follower guide rollers in the guide roller group to regulate the fiber tension; Adjust the position of the guide wheel body in the guide wheel assembly to adjust the wire exit angle; The filament bundle is sequentially guided through the guide wheel body, the follower guide roller, and the drive guide roller for production.

10. The guidewire method according to claim 9, characterized in that, Adjust the position of the guide wheel body so that the filament exit angle is 15±1°, and / or adjust the roller speed ratio so that the running tension of the filament is 15±2cN.

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