A network device and a method for making network points

Abstract

The present invention belongs to the technical field of spinning, and relates to an air-jet texturing device and a method for creating texturing points. Inside the air-jet texturing device, there are a tow channel, a compressed air channel, and a jet rotating device; the extending direction of the tow channel is parallel to the front-back direction, and the compressed air channel is located below the tow channel; the jet rotating device is installed at the junction of the tow channel and the compressed air channel; an air flow channel is provided inside the jet rotating device, and the air flow channel is the only channel between the tow channel and the compressed air channel, and the extending direction of the air flow channel is perpendicular to the left-right direction; when the tow passes through the tow channel, it contacts the jet rotating device and drives the jet rotating device to rotate around a central axis parallel to the left-right direction. The method for creating texturing points is to pass the tow through the tow channel and continuously introduce compressed air into the compressed air channel. The air-jet texturing device of the present invention can meet the requirements of both texturing degree and no loop formation, and the method for creating texturing points of the present invention saves compressed air and is suitable for large-scale industrial applications.

Description

Technical Field

[0001] The present invention belongs to the technical field of spinning, and particularly relates to an air-jet texturing device and a method for creating texturing points. Background Art

[0002] In the production process of filament yarns, the polymer melt is first conveyed to a spinning box. In the spinning box, the polymer melt is evenly extruded after metering and filtering, and then cooled and solidified to form a nascent fiber. After processes such as bundling, oiling, and drawing and setting, the nascent fiber is then textured by an air-jet texturing device to finally form a filament yarn with a certain entanglement structure. The textured filament yarn has stable, uniform, and dense texturing points, and the filament bundle has good cohesion, does not diverge during the weaving process, and runs stably. Therefore, studying the texturing method of the filament bundle has important application value.

[0003] Traditional texturing methods rely on the nozzles of the air-jet texturing device to continuously eject compressed air to impact the filament bundle passing through the filament channel to form texturing points. The eddy current pattern formed by the continuously ejected compressed air causes the filament bundle to vibrate violently at a high frequency and continuously impacts the wall of the filament channel of the air-jet texturing device; the higher the texturing pressure, the higher the texturing degree (the number of texturing points formed per meter of the filament bundle), but at the same time, the vibration frequency of the filament bundle in the air-jet texturing device is also higher, and the impact is stronger. This impact easily causes the single filaments to be unevenly stretched, thus showing as looped filaments; moreover, after the texturing pressure is large enough, the texturing degree no longer increases significantly, but instead increases the probability of looped filaments. Therefore, the method of continuously ejecting compressed air is difficult to balance the two requirements of looped filaments and texturing degree.

[0004] For example, the patent application CN114318619A that uses continuous ejection of compressed air provides a method for improving the texturing fastness of textured multifilaments, and designs a nozzle with two nozzles, which can form eddy currents with different rotation directions in the filament channel; among them, the air flow ejected from nozzle I determines the deflection direction of the textured multifilament. The air flow direction is not aligned with the central axis of the filament channel, but only acts on the single filaments on the outer side of the multifilament. The ejected air flow forms a rotating eddy current in the filament channel, causing the outer single filaments to wrap around the inner single filaments; the direction of the rotating eddy current formed by the air flow ejected from nozzle II is opposite to that of nozzle I. Nozzle II does not change the deflection direction of the texturing nodes, but only disrupts and interferes with the direction of the texturing nodes, obtaining better texturing fastness and being not easy to separate. Using this nozzle, polyester textured multifilaments of 30~150 dtex / 10~40 f can be formed, eliminating the steps of twisting or sizing and shortening the weaving process flow; however, the disadvantage of this method is that the filament bundle is prone to forming looped filaments in the rotating eddy current.

[0005] For another example, the patent CN220597744U that uses continuous injection of compressed air discloses a main networker nozzle for industrial yarn without sizing. During use, through the eddy current formed by the cross-flow of double nozzles, the blowing effect on each single filament in the filament bundle is uniform, and problems such as hairiness and filament breakage are not likely to occur. It can form network nodes in different directions on the side of the filament bundle, and the network nodes have good uniformity in all directions and are not easily loosened. However, using double nozzles in this networker cannot improve the problem of severe shaking of the filament bundle caused by continuous injection of compressed air and the collision with the wall of the networker.

[0006] To solve the above problems, the prior art has proposed a network method using intermittent injection of compressed air. For example, the patent application CN114318617A provides a network composite filament and its network method and application. It uses a double-nozzle nozzle, and nozzle I and nozzle II intermittently inject compressed air into the filament channel. When the air flow is on, it forms an interlacing part for the composite filament bundle to form a network, and when it is off, it is a fiber-opening part. By adjusting the time difference between the air flows of the two nozzles, it controls the staggered network of nozzle I and nozzle II, avoiding the coincidence of interlacing part I and interlacing part II, and forming a 30 - 150 dtex / 10 - 40 f fine denier DTY network composite filament composed of a series of continuous cyclic units. Each cyclic unit consists of fiber-opening part I, interlacing part I, fiber-opening part II, and interlacing part II connected in sequence. Using this double-nozzle nozzle, by controlling the different network degrees of interlacing part I and interlacing part II, interlacing part II has a lower network degree, and the network nodes are easily loosened, thus forming a structure with partial interlacing and partial loosening on the composite filament, which can meet the requirements of non-twisting and non-sizing. However, the intermittent injection of compressed air in this method is only applicable to the production of network composite filaments with a relatively low winding speed. Under the condition of a high winding speed, it is difficult to accurately control the jet frequency and jet intensity to be uniform. This is because during the network process of the filament bundle, the same network points need to be formed on a filament bundle of the same length (for example, 1 m). The higher the winding speed, the shorter the time for the filament bundle to pass through the networker. It is difficult to accurately synchronously increase the jet frequency, and when the intensity of the air flow remains unchanged, when the intermittent air flow reaches the filament bundle through a long compressed air channel, the intensity of the intermittent air flow decreases more, and the acting force on the filament bundle also decreases more.

[0007] Therefore, there is an urgent need to develop a network device and network method that can take into account the network degree of the filament bundle and not produce looped filaments under high winding speed conditions. Summary of the Invention

[0008] The purpose of the present invention is to solve the problems existing in the prior art and provide a networker and a method for making network points.

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

[0010] A networker is internally provided with a tow channel and a compressed air channel. The extending direction of the tow channel is parallel to the front-back direction. The compressed air channel is located below the tow channel, and a jet rotating device is also provided inside.

[0011] The jet rotating device is installed at the junction of the tow channel and the compressed air channel.

[0012] An air flow channel is provided inside the jet rotating device. The air flow channel is the only channel between the tow channel and the compressed air channel, and the extending direction of the air flow channel is perpendicular to the left-right direction.

[0013] The installation method of the jet rotating device satisfies that when the tow passes through the tow channel, it contacts the jet rotating device and drives the jet rotating device to rotate around the central axis parallel to the left-right direction.

[0014] As a preferred technical solution:

[0015] For a networker as described above, the jet rotating device includes a left convex handle, an ellipsoid, and a right convex handle arranged in sequence along the left-right direction. The major axis of the ellipsoid is parallel to the left-right direction. The air flow channel is located inside the ellipsoid, and the air flow channel is a cylindrical channel.

[0016] For a networker as described above, the length L3 of the jet rotating device along the left-right direction is 14 - 18 mm, the major axis length L2 of the ellipsoid is 8 - 10 mm, the minor axis length L6 of the ellipsoid is 5 - 7 mm, the diameter L1 of the air flow channel is 4 - 6 mm. Both the left convex handle and the right convex handle are cylindrical structures with the central axis parallel to the left-right direction and the same size. The diameter L5 of the right convex handle is 2 - 3 mm. The width of the tow channel along the left-right direction is 5 - 7 mm, so that all the tows in the tow channel can be blown by the air flow simultaneously, which is beneficial to forming uniform network points in the transverse direction of the tow. The length of the tow channel along the front-back direction is 35 - 45 mm.

[0017] For a networker as described above, the air flow channel passes through the center of the ellipsoid.

[0018] For a networker as described above, the jet rotating device is a ceramic part with a smooth surface, and the surface roughness Ra value is 1.2 - 2.0 μm.

[0019] For a networker as described above, left and right grooves are provided at the junction of the tow channel and the compressed air channel inside the networker.

[0020] The shape of the left groove is the same as the overall shape formed by the left convex handle and the left end of the ellipsoid, and the size is slightly larger than the overall shape formed by the left convex handle and the left end of the ellipsoid. In this way, it can ensure that the jet rotating device can rotate freely while avoiding excessive shaking. The overall shape formed by the left convex handle and the left end of the ellipsoid is embedded in the left groove, and the height of the gap between the two along the up-down direction is 0.05 - 0.1 mm.

[0021] The shape of the right groove is the same as the overall shape formed by the right convex handle and the right end of the ellipsoid, and its size is slightly larger than the overall shape formed by the right convex handle and the right end of the ellipsoid. This can ensure that the jet rotation device can rotate freely while avoiding excessive shaking. The overall shape formed by the right convex handle and the right end of the ellipsoid is embedded in the right groove, and the height of the gap between the two in the up and down direction is 0.05 - 0.1 mm.

[0022] The surfaces of the left groove and the right groove are smoothed to reduce the frictional resistance during the rotation of the jet rotation device, and the surface roughness Ra value is 0.8 - 1.0 μm.

[0023] For a networker as described above, the extending direction of the compressed air channel is parallel to the up and down direction.

[0024] For a networker as described above, the networker is divided into an upper cover layer, an intermediate layer, and a main body layer arranged in sequence from top to bottom. The tow channel is arranged in the intermediate layer, and the compressed air channel is arranged in the main body layer. The tow channel is jointly surrounded by a left wall, a right wall, an upper wall, and a lower wall. The left wall is composed of two upper and lower parts, and the lower part of the left wall is detachably connected to the lower wall, so that it is convenient to install the jet rotation device. There is a gap between the lower part and the upper part of the left wall, and this gap is the tow inlet.

[0025] For a networker as described above, the right side surface of the left wall, the left side surface of the right wall, and the lower surface of the upper wall are all flat surfaces, and the upper surface of the lower wall is a curved surface. This curved surface arches upward in the front and back direction and arches downward in the left and right direction. Such a design is beneficial for the tow to effectively contact the jet rotation device and drive the jet rotation device to rotate; the right side surface of the left wall and the left side surface of the right wall are both vertical surfaces, and the lower surface of the upper wall is a horizontal surface. The maximum distance between the lower surface of the upper wall and the upper surface of the lower wall is 7 - 9 mm, and the minimum distance between the lower surface of the upper wall and the upper surface of the lower wall is 5 - 7 mm.

[0026] The present invention also provides a method for making network dots. Using a networker as described in any one of the above, pass the tow through the tow channel and continuously introduce compressed air into the compressed air channel.

[0027] As a preferred technical solution:

[0028] For a method for making network dots as described above, the tow is 1000 dtex / 96f polyester high-strength industrial yarn, the winding speed is 3000 - 4200 m / min, the winding tension is 180 - 210 cN, the network pressure (i.e., the pressure of the compressed air) is 3.5 bar. After the tow leaves the tow channel, the network density is 12 - 16 per meter, and the number of coiled tows is 0 per meter.

[0029] Alternatively, the tow is 500dtex / 144f polyester low-shrink industrial yarn, the winding speed is 3250-3650m / min, the winding tension is 70-80cN, the network pressure is 3.0bar, and after the tow leaves the tow channel, the network degree is 20-21 / m, and the number of loops is 0 / m;

[0030] Under the premise of the same tow, winding speed and winding tension, the method of continuous injection of compressed air in the prior art is used to make network dots (for example, the nozzle disclosed in CN114318619A is used). If the network pressure is the same as that of the present invention, the network degree is much lower than that of the present invention. If the network degree is close to that of the present invention, the network pressure is much greater than that of the present invention, and loops will appear. It can be seen from the comparison that, compared with the method of continuous injection of compressed air in the prior art, the present invention can take into account the requirements of no loops and higher network degree.

[0031] In the present invention, when the tow, winding tension, and network pressure are the same and the winding speeds are different, the network degree of the tow after leaving the tow channel is the same; in the prior art method of intermittently spraying compressed air, when the tow, winding tension, and network pressure are the same and the winding speeds are different, the network degree is different; by comparison, it can be seen that compared with the prior art method of intermittently spraying compressed air, the present invention can accurately control the jet frequency and jet intensity at different winding speeds to keep them uniform, and the fundamental reason is:

[0032] The network compressed air equipment for a single spinning position is composed of a pressure regulating valve, a compressed air main pipeline and a compressed air branch pipeline (compressed air is compressed air); the pressure regulating valve provides a stable compressed air pressure to the compressed air main pipeline, and the compressed air main pipeline sends compressed air to the compressed air branch pipeline. However, since the length of the compressed air main pipeline is usually 2-20m, it takes a long time for the compressed air pressure change of the compressed air branch pipeline to be transmitted to the pressure regulating valve. If the compressed air fluctuation in the compressed air branch pipeline is unstable, it is easy to cause a relatively large pressure fluctuation in the compressed air main pipeline. Therefore, the more stable the compressed air sent out by the compressed air branch pipeline, the more stable the network pressure of the compressed air main pipeline, and the more stable the compressed air delivered to the compressed air branch pipeline; in the network device of the present invention, the filament channel and the compressed air channel remain connected during the jet time period, and the intensity of the injected compressed air is consistent with that of the compressed air channel; the jet rotating device is controlled by the running speed of the filament bundle. The faster the winding speed of the filament bundle, the greater the rotational force provided to the jet rotating device, and the greater the rotation speed of the jet rotating device. Therefore, the present invention can accurately control the jet frequency and keep the jet intensity uniform at different winding speeds.

[0033] Beneficial effects:

[0034] (1) The air jet rotating device of the networker of the present invention is close to the tow. The faster the winding speed is, the faster the rotating speed of the air jet rotating device is. Under the condition of high winding speed, the air jet frequency can be accurately controlled and the air jet intensity can be kept uniform, forming uniform and stable network points. When the tow, winding tension, and network pressure are the same and the winding speeds are different, the network degree of the tow after leaving the tow channel is the same.

[0035] (2) By rotating, the air jet rotating device of the networker of the present invention intermittently opens and closes the air flow channel, avoiding the looped tow caused by the impact of the tow on the inner wall of the tow channel due to continuous injection of compressed air.

[0036] (3) The method of making network points of the present invention uses intermittent injection of compressed air, which can save compressed air, is beneficial to energy conservation and consumption reduction, and is suitable for large-scale industrial applications. Description of the Drawings

[0037] Figure 1 is a three-dimensional structural schematic diagram of the networker of the present invention. Among them, the X-axis direction is the left-right direction, the Y-axis direction is the front-back direction, and the Z-axis direction is the up-down direction;

[0038] Figure 2 is Figure 1 the A-A sectional schematic diagram of

[0039] Figure 3 is a top view schematic diagram of the main body layer of the networker of the present invention;

[0040] Figure 4 is a front view structural schematic diagram of the air jet rotating device of the networker of the present invention;

[0041] Figure 5 is a side view structural schematic diagram of the air jet rotating device of the networker of the present invention;

[0042] Figure 6 is a schematic diagram of the position of the air jet rotating device of the networker of the present invention before starting to jet air in the air flow channel;

[0043] Figure 7 is a schematic diagram of the position of the air jet rotating device of the networker of the present invention when jetting air in the air flow channel;

[0044] Figure 8 is a schematic diagram of the position of the air jet rotating device of the networker of the present invention when ending jetting air in the air flow channel;

[0045] Among them, 11 is the main body layer, 12 is the compressed air channel, 21 is the non-removable plate, 22 is the tow channel, 23 is the tow inlet, 31 is the upper cover layer, 41 is the removable plate, 51 is the jet rotating device, 52 is the right convex handle, 53 is the air flow channel, 54 is the left convex handle, 55 is the ellipsoid, 61 is the tow, L1 is the diameter of the air flow channel, L2 is the major axis length of the ellipsoid, L3 is the length of the jet rotating device in the left-right direction, L4 is the length of the air flow channel, L5 is the diameter of the right convex handle, and L6 is the minor axis length of the ellipsoid. Specific embodiments

[0046] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

[0047] The following are the test methods for relevant performance indicators in each embodiment and comparative example:

[0048] Degree of entanglement: The degree of entanglement is tested by the manual stitch transfer method according to the standard of FZ / T 50001-2016: Measure a tow with a length of 1 meter, fix one end of the tow, start from the fixed end, pierce the tow from the center position with a needle and slide it downwards. When there is entanglement and resistance in the tow, it is regarded as an entanglement point. Then start operating from below the entanglement using the same method until the 1-meter-long tow is tested. Count the number of entanglement points; each tow is tested twice, and the average value of the number of entanglement points in the two tests is taken as the degree of entanglement, unit: number / meter.

[0049] Number of coiled tows: It is detected using a YIS 200 hairiness detector. Using the principle of image method, when the tow continuously passes through the sight glass detection area, the sight glass continuously collects two-dimensional information of the tow and its hairiness, and performs digital processing on the collected image to identify and extract the hairiness on the tow; according to the processed image, the operator counts the number of coiled tows by viewing and analyzing the tow morphology; the length of the tow for a single test is 10,000 meters, the running speed of the tow is 400 m / min, and counting is performed when the distance sensitivity is set greater than 1500 µm.

[0050] Number of times of intermittent injection of compressed air and jet intensity: The number of times of intermittent injection of compressed air and the jet intensity are detected by setting pressure sensors on the inner wall of the tow channel that is vertically and intersectingly connected to the compressed air channel. When the pressure of the compressed air acts on the sensor, the sensitive element metal strain gauge inside it deforms, and this deformation further causes changes in the inductance parameters. These pressure changes are converted into measurable electrical signals and output, forming a periodic fluctuation image on the central control display with time as the abscissa and intensity as the ordinate. The peak of the fluctuation image is the jet intensity of the compressed air, and the number of peaks in one minute is the number of times of intermittent injection of compressed air; in addition, a pressure gauge is provided on the compressed air channel, and the compressed air pressure in the compressed air channel is consistent with the jet intensity of the networker. Whether the jet intensity is stable can be judged by checking the display data of the pressure gauge.

[0051] Surface roughness Ra value: The surface roughness Ra value is detected using the needle tracing method, that is: using a diamond stylus to gently slide across the surfaces of the jet rotating device and the jet rotating device placement area. When the stylus slides, the surface roughness causes the stylus to move up and down, and this displacement causes changes in the inductance of the inductor coil of the sensor, thereby generating an analog signal proportional to the surface roughness at the output end of the phase-sensitive rectifier; this signal enters the data acquisition system after amplification and level conversion, and the DSP chip performs digital filtering and parameter calculation on the collected data, and finally obtains the Ra value.

[0052] Example 1

[0053] A networker, as Figures 1-2 shown, is composed of a main body layer 11, a non-removable plate 21, an upper cover layer 31, a removable plate 41 and a jet rotating device 51. The non-removable plate 21 and the removable plate 41 form an intermediate layer, and the upper cover layer 31, the intermediate layer and the main body layer 11 are arranged in sequence from top to bottom;

[0054] A tow channel 22 is arranged inside the intermediate layer. The extending direction of the tow channel 22 is parallel to the front-back direction. The tow channel 22 is jointly surrounded by a left wall, a right wall, an upper wall and a lower wall. The left wall is composed of upper and lower parts. The lower part of the left wall is detachably connected to the lower wall. The removable plate 41 forms the lower part of the left wall. There is a gap between the lower part of the left wall and the upper part of the left wall, and this gap is the tow inlet 23; the right side surface of the left wall, the left side surface of the right wall, and the lower surface of the upper wall are all flat surfaces, and the upper surface of the lower wall is a curved surface. Along the front-back direction, this curved surface arches upward, and along the left-right direction, this curved surface arches downward; the right side surface of the left wall and the left side surface of the right wall are both vertical surfaces, and the lower surface of the upper wall is a horizontal surface. The maximum distance between the lower surface of the upper wall and the upper surface of the lower wall is 7 mm, and the minimum distance between the lower surface of the upper wall and the upper surface of the lower wall is 5 mm;

[0055] There is a compressed air channel 12 inside the main body layer 11. The compressed air channel 12 is located below the tow channel 22. The jet rotating device 51 is installed at the junction of the tow channel 22 and the compressed air channel 12, as Figure 2 and Figure 3 shown; There is an air flow channel 53 inside the jet rotating device 51. The air flow channel 53 is the only channel between the tow channel 22 and the compressed air channel 12. The extending direction of the air flow channel 53 is perpendicular to the left-right direction, and the extending direction of the compressed air channel 12 is parallel to the up-down direction; As Figure 4 and Figure 5 shown, the jet rotating device 51 is composed of a left convex handle 54, an ellipsoid 55, and a right convex handle 52 arranged in sequence along the left-right direction. The major axis of the ellipsoid 55 is parallel to the left-right direction. The air flow channel 53 is located inside the ellipsoid 55. The air flow channel 53 is a cylindrical channel, and the air flow channel 53 passes through the center of the ellipsoid 55;

[0056] The length L3 of the jet rotating device 51 along the left-right direction is 16 mm. The major axis length L2 of the ellipsoid 55 is 9 mm. The minor axis length L6 of the ellipsoid 55 is 6 mm. The diameter L1 of the air flow channel 53 is 5 mm. Both the left convex handle 54 and the right convex handle 52 are cylindrical structures, the central axes are parallel to the left-right direction and have the same dimensions. The diameter L5 of the right convex handle 52 is 2 mm. The jet rotating device 51 is a ceramic part with a smooth surface. The surface roughness Ra value of the jet rotating device 51 is 1.6 ± 0.4 μm;

[0057] The width of the tow channel 22 along the left-right direction is 5 mm. The length of the tow channel 22 along the front-back direction is 35 mm;

[0058] There are a left groove and a right groove at the junction of the tow channel 22 and the compressed air channel 12. The space between the left groove and the right groove constitutes the placement area for the jet rotating device;

[0059] The shape of the left groove is the same as the overall shape formed by the left end of the left convex handle 54 and the ellipsoid 55. The overall shape formed by the left end of the left convex handle 54 and the ellipsoid 55 is embedded in the left groove. The height of the gap between the two along the up-down direction is 0.08 ± 0.01 mm;

[0060] The shape of the right groove is the same as the overall shape formed by the right end of the right convex handle 52 and the ellipsoid 55. The overall shape formed by the right end of the right convex handle 52 and the ellipsoid 55 is embedded in the right groove. The height of the gap between the two along the up-down direction is 0.08 ± 0.01 mm. The surfaces of the left groove and the right groove are smooth. The surface roughness Ra value of the left groove and the right groove is 0.9 ± 0.1 μm;

[0061] During installation, after placing the jet rotating device 51 in the jet rotating device placement area, cover the detachable plate 41, non-detachable plate 21, and upper cover layer 31. The detachable plate 41 is located above the main body layer 11. Use fixing screws to lock the three layers of the main body layer 11, non-detachable plate 21, and upper cover layer 31. Also use fixing screws to lock the two layers of the detachable plate 41 and the main body layer 11. The detachable plate 41 functions to fix the lower part of the left wall. The installation method of the jet rotating device 51 satisfies that when the tow 61 passes through the tow channel 22, it contacts the jet rotating device 51 and drives the jet rotating device 51 to rotate around the central axis parallel to the left-right direction. When the jet rotating device 51 rotates to Figure 6 the position shown, the air flow channel 53 is about to start jetting compressed air; when the jet rotating device 51 rotates to Figure 7 the position shown, the air flow channel 53 is fully opened to jet compressed air; when the jet rotating device 51 rotates to Figure 8 the position shown, the jet rotating device 51 is about to close, realizing the dynamic opening and closing of the air flow channel 53 by the jet rotating device 51.

[0062] Embodiment 2

[0063] A network device, as Figures 1-2 shown, is composed of a main body layer 11, a non-detachable plate 21, an upper cover layer 31, a detachable plate 41, and a jet rotating device 51. The non-detachable plate 21 and the detachable plate 41 form an intermediate layer. The upper cover layer 31, the intermediate layer, and the main body layer 11 are arranged in sequence from top to bottom;

[0064] Inside the intermediate layer, there is a tow channel 22. The extending direction of the tow channel 22 is parallel to the front-back direction. The tow channel 22 is jointly surrounded by a left wall, a right wall, an upper wall, and a lower wall. The left wall is composed of upper and lower parts. The lower part of the left wall is detachably connected to the lower wall. The detachable plate 41 forms the lower part of the left wall. There is a gap between the lower part of the left wall and the upper part of the left wall. This gap is the tow inlet 23. The right side surface of the left wall, the left side surface of the right wall, and the lower surface of the upper wall are all flat surfaces. The upper surface of the lower wall is a curved surface. Along the front-back direction, this curved surface arches upward. Along the left-right direction, this curved surface arches downward. The right side surface of the left wall and the left side surface of the right wall are both vertical surfaces. The lower surface of the upper wall is a horizontal surface. The maximum distance between the lower surface of the upper wall and the upper surface of the lower wall is 8 mm. The minimum distance between the lower surface of the upper wall and the upper surface of the lower wall is 6 mm;

[0065] Inside the main body layer 11, there is a compressed air channel 12. The compressed air channel 12 is located below the tow channel 22. The jet rotating device 51 is installed at the junction of the tow channel 22 and the compressed air channel 12, as Figure 2 and Figure 3As shown; an air flow channel 53 is provided inside the jet rotation device 51. The air flow channel 53 is the only channel between the tow channel 22 and the compressed air channel 12. The extending direction of the air flow channel 53 is perpendicular to the left-right direction, and the extending direction of the compressed air channel 12 is parallel to the up-down direction; as Figure 4 and Figure 5 shown, the jet rotation device 51 is composed of a left convex handle 54, an ellipsoid 55, and a right convex handle 52 arranged in sequence along the left-right direction. The major axis of the ellipsoid 55 is parallel to the left-right direction. The air flow channel 53 is located inside the ellipsoid 55. The air flow channel 53 is a cylindrical channel, and the air flow channel 53 passes through the center of the ellipsoid 55;

[0066] The length L3 of the jet rotation device 51 along the left-right direction is 18 mm. The major axis length L2 of the ellipsoid 55 is 10 mm. The minor axis length L6 of the ellipsoid 55 is 7 mm. The diameter L1 of the air flow channel 53 is 6 mm. Both the left convex handle 54 and the right convex handle 52 are cylindrical structures with the central axis parallel to the left-right direction and the same dimensions. The diameter L5 of the right convex handle 52 is 3 mm. The jet rotation device 51 is a ceramic part with a smooth surface. The surface roughness Ra value of the jet rotation device 51 is 1.6 ± 0.4 μm;

[0067] The width of the tow channel 22 along the left-right direction is 6 mm. The length of the tow channel 22 along the front-back direction is 40 mm;

[0068] Left and right grooves are provided at the junction of the tow channel 22 and the compressed air channel 12. The space between the left and right grooves constitutes the placement area for the jet rotation device;

[0069] The shape of the left groove is the same as the overall structure formed by the left end of the left convex handle 54 and the ellipsoid 55, and its size is slightly larger than the overall structure formed by the left end of the left convex handle 54 and the ellipsoid 55. The overall structure formed by the left end of the left convex handle 54 and the ellipsoid 55 is embedded in the left groove, and the height of the gap between the two along the up-down direction is 0.1 ± 0.01 mm;

[0070] The shape of the right groove is the same as the overall structure formed by the right end of the right convex handle 52 and the ellipsoid 55, and its size is slightly larger than the overall structure formed by the right end of the right convex handle 52 and the ellipsoid 55. The overall structure formed by the right end of the right convex handle 52 and the ellipsoid 55 is embedded in the right groove, and the height of the gap between the two along the up-down direction is 0.1 ± 0.01 mm. The surfaces of the left and right grooves are smooth, and the surface roughness Ra value of the left and right grooves is 0.9 ± 0.1 μm;

[0071] During installation, after placing the jet rotating device 51 in the jet rotating device placement area, cover the detachable plate 41, the non-detachable plate 21, and the upper cover layer 31. The detachable plate 41 is located above the main body layer 11. Use fixing screws to lock the three layers of the main body layer 11, the non-detachable plate 21, and the upper cover layer 31. Also use fixing screws to lock the two layers of the detachable plate 41 and the main body layer 11. The detachable plate 41 functions to fix the lower part of the left wall. The installation method of the jet rotating device 51 satisfies that when the tow 61 passes through the tow channel 22, it contacts the jet rotating device 51 and drives the jet rotating device 51 to rotate around the central axis parallel to the left-right direction. When the jet rotating device 51 rotates to Figure 6 the position shown, the air flow channel 53 is about to start spraying compressed air; when the jet rotating device 51 rotates to Figure 7 the position shown, the air flow channel 53 is fully opened to spray compressed air; when the jet rotating device 51 rotates to Figure 8 the position shown, the jet rotating device 51 is about to close, realizing the dynamic opening and closing of the air flow channel 53 by the jet rotating device 51.

[0072] Embodiment 3

[0073] A network device, as Figures 1-2 shown, is composed of a main body layer 11, a non-detachable plate 21, an upper cover layer 31, a detachable plate 41, and a jet rotating device 51. The non-detachable plate 21 and the detachable plate 41 form an intermediate layer. The upper cover layer 31, the intermediate layer, and the main body layer 11 are arranged in sequence from top to bottom;

[0074] Inside the intermediate layer, there is a tow channel 22. The extending direction of the tow channel 22 is parallel to the front-rear direction. The tow channel 22 is jointly surrounded by a left wall, a right wall, an upper wall, and a lower wall. The left wall is composed of upper and lower parts. The lower part of the left wall is detachably connected to the lower wall. The detachable plate 41 forms the lower part of the left wall. There is a gap between the lower part of the left wall and the upper part of the left wall. This gap is the tow inlet 23. The right side surface of the left wall, the left side surface of the right wall, and the lower surface of the upper wall are all flat surfaces. The upper surface of the lower wall is a curved surface. Along the front-rear direction, this curved surface arches upward. Along the left-right direction, this curved surface arches downward. The right side surface of the left wall and the left side surface of the right wall are both vertical surfaces. The lower surface of the upper wall is a horizontal surface. The maximum distance between the lower surface of the upper wall and the upper surface of the lower wall is 9 mm. The minimum distance between the lower surface of the upper wall and the upper surface of the lower wall is 7 mm;

[0075] Inside the main body layer 11, there is a compressed air channel 12. The compressed air channel 12 is located below the tow channel 22. The jet rotating device 51 is installed at the junction of the tow channel 22 and the compressed air channel 12, as Figure 2 and Figure 3As shown; an air flow channel 53 is provided inside the jet rotation device 51. The air flow channel 53 is the only channel between the tow channel 22 and the compressed air channel 12. The extending direction of the air flow channel 53 is perpendicular to the left - right direction, and the extending direction of the compressed air channel 12 is parallel to the up - down direction; as Figure 4 and Figure 5 shown, the jet rotation device 51 is composed of a left convex handle 54, an ellipsoid 55, and a right convex handle 52 arranged in sequence along the left - right direction. The major axis of the ellipsoid 55 is parallel to the left - right direction. The air flow channel 53 is located inside the ellipsoid 55. The air flow channel 53 is a cylindrical channel and passes through the center of the ellipsoid 55;

[0076] The length L3 of the jet rotation device 51 along the left - right direction is 14 mm, the major axis length L2 of the ellipsoid 55 is 8 mm, the minor axis length L6 of the ellipsoid 55 is 5 mm, the diameter L1 of the air flow channel 53 is 4 mm. Both the left convex handle 54 and the right convex handle 52 are cylindrical structures, the central axes are parallel to the left - right direction and have the same dimensions. The diameter L5 of the right convex handle 52 is 2 mm. The jet rotation device 51 is a ceramic part with a smooth surface, and the surface roughness Ra value of the jet rotation device 51 is 1.6 ± 0.4 μm;

[0077] The width of the tow channel 22 along the left - right direction is 7 mm, and the length of the tow channel 22 along the front - back direction is 45 mm;

[0078] Left and right grooves are provided at the junction of the tow channel 22 and the compressed air channel 12. The space between the left and right grooves constitutes the placement area for the jet rotation device;

[0079] The shape of the left groove is the same as the overall shape formed by the left end of the left convex handle 54 and the ellipsoid 55, and its size is slightly larger than the overall shape formed by the left end of the left convex handle 54 and the ellipsoid 55. The overall shape formed by the left end of the left convex handle 54 and the ellipsoid 55 is embedded in the left groove, and the height of the gap between the two along the up - down direction is 0.05 ± 0.01 mm;

[0080] The shape of the right groove is the same as the overall shape formed by the right end of the right convex handle 52 and the ellipsoid 55, and its size is slightly larger than the overall shape formed by the right end of the right convex handle 52 and the ellipsoid 55. The overall shape formed by the right end of the right convex handle 52 and the ellipsoid 55 is embedded in the right groove, and the height of the gap between the two along the up - down direction is 0.05 ± 0.01 mm. The surfaces of the left and right grooves are smooth - treated, and the surface roughness Ra value of the left and right grooves is 0.9 ± 0.1 μm;

[0081] During installation, after placing the jet rotating device 51 in the placement area for the jet rotating device, the detachable plate 41, the non-detachable plate 21, and the upper cover layer 31 are covered. The detachable plate 41 is located above the main body layer 11. The main body layer 11, the non-detachable plate 21, and the upper cover layer 31 are locked using fixing screws. The detachable plate 41 and the main body layer 11 are also locked using fixing screws. The detachable plate 41 functions to fix the lower part of the left wall. The installation method of the jet rotating device 51 is such that when the tow 61 passes through the tow channel 22, it contacts the jet rotating device 51 and drives the jet rotating device 51 to rotate about a central axis parallel to the left-right direction. When the jet rotating device 51 rotates to Figure 6 the position shown, the air flow channel 53 is about to start jetting compressed air; when the jet rotating device 51 rotates to Figure 7 the position shown, the air flow channel 53 is fully opened; when the jet rotating device 51 rotates to Figure 8 the position shown, the jet rotating device 51 is about to close, realizing the dynamic opening and closing of the air flow channel 53 by the jet rotating device 51.

[0082] Example 4

[0083] A method of making network points is to pass the tow through the tow channel of the networker in Example 1 and continuously introduce compressed air into the compressed air channel;

[0084] The tow is 1000 dtex / 96f polyester high-strength industrial yarn, the winding speed is 3000 m / min, the winding tension is 180 cN, and the network pressure is 3.5 bar;

[0085] After the tow leaves the tow channel, the network density is 12 per meter and the number of coiled filaments is 0 per meter.

[0086] Example 5

[0087] A method of making network points is basically the same as that in Example 4, except that: the winding speed is 4200 m / min;

[0088] After the tow leaves the tow channel, both the network density and the number of coiled filaments are the same as in Example 4.

[0089] Comparing Example 4 with Example 5, it can be seen that although the winding speed is increased and the wire outlet speed in the networker is fast, since the rotation of the jet rotating device is driven by the tow, the rotation speed of the jet rotating device also increases accordingly, so that the network density of the tow in the networker can be kept stable and uniform, that is, when the tow, winding tension, and network pressure are the same and the winding speed is different, the network density of the tow after leaving the tow channel is the same.

[0090] Comparative Example 1

[0091] A method of making network points is basically the same as that in Example 4, except that: in the used networker, the jet rotation device is fixed and non-rotatable, and the extending direction of the air flow channel is parallel to the up-down direction;

[0092] After the tow leaves the tow channel, the network degree is 8 per meter, and the number of coiled filaments is 0.004 per meter.

[0093] Comparing Example 4 with Comparative Example 1, it can be seen that under the action of the same network pressure, with the jet rotation device fixed, there is no difference from the traditional continuous injection of compressed air. Not only is the network degree of the tow low, but coiled filaments are more likely to be generated.

[0094] Comparative Example 2

[0095] A method of making network points is basically the same as that in Example 4, except that: the nozzle disclosed in CN114318617A is used for intermittent jetting and making network points;

[0096] After the tow leaves the tow channel, the network degree is 10 per meter, and the number of coiled filaments is 0.002 per meter.

[0097] Comparative Example 3

[0098] A method of making network points is basically the same as that in Example 5, except that: the nozzle disclosed in CN114318617A is used for intermittent jetting and making network points;

[0099] After the tow leaves the tow channel, the network degree is 6 per meter, and the number of coiled filaments is 0.001 per meter.

[0100] Comparing Comparative Example 2 with Comparative Example 3, it can be seen that when using the intermittent jetting of CN114318617A, on the premise that the tow, winding tension, and network pressure are the same, as the winding speed increases, the filament discharging speed of the tow in the networker speeds up, and the network degree decreases.

[0101] Example 6

[0102] A method of making network points is to pass the tow through the tow channel of the networker in Example 2, and continuously introduce compressed air into the compressed air channel;

[0103] The tow is 1000 dtex / 96f polyester high-strength industrial yarn, the winding speed is 3000 m / min, the winding tension is 210 cN, and the network pressure is 3.5 bar;

[0104] After the tow leaves the tow channel, the network degree is 16 per meter, and the number of coiled filaments is 0 per meter.

[0105] Example 7

[0106] A method for dotting the network is basically the same as that in Example 6, except that the winding speed is 4200 m / min;

[0107] After the tow leaves the tow channel, the degree of entanglement and the number of coiled filaments are the same as those in Example 6.

[0108] Example 8

[0109] A method for dotting the network is to pass the tow through the tow channel of the network device in Example 3 and continuously introduce compressed air into the compressed air channel;

[0110] The tow is 1000 dtex / 96 f polyester high-strength industrial yarn, the winding speed is 3500 m / min, the winding tension is 200 cN, and the network pressure is 3.5 bar;

[0111] After the tow leaves the tow channel, the degree of entanglement is 12 per meter and the number of coiled filaments is 0 per meter.

[0112] Example 9

[0113] A method for dotting the network is to pass the tow through the tow channel of the network device in Example 1 and continuously introduce compressed air into the compressed air channel;

[0114] The tow is 500 dtex / 144 f polyester high-strength industrial yarn, the winding speed is 3250 m / min, the winding tension is 70 cN, and the network pressure is 3.0 bar;

[0115] After the tow leaves the tow channel, the degree of entanglement is 20 per meter and the number of coiled filaments is 0 per meter.

[0116] Example 10

[0117] A method for dotting the network is basically the same as that in Example 9, except that the winding speed is 3650 m / min;

[0118] After the tow leaves the tow channel, the degree of entanglement and the number of coiled filaments are the same as those in Example 9.

[0119] Comparing Example 10 with Example 9, it can be seen that on the premise that the tow, winding tension, and network pressure are the same, when the winding speed fluctuates by 12%, the degree of entanglement and the number of coiled filaments of the present invention remain stable and unchanged.

[0120] Comparative Example 4

[0121] A method for dotting the network is basically the same as that in Example 10, except that in the network device used, the jet rotating device is fixed and non-rotatable, and the extending direction of the air flow channel is parallel to the up-down direction;

[0122] After the tow leaves the tow channel, the texturing degree is 13 per meter and the number of coiled filaments is 0.008 per meter.

[0123] Comparing Example 10 with Comparative Example 4, it can be seen that for the fine denier 500 dtex / 144 f polyester high-strength industrial yarn, when using the present invention to apply texturing points, its texturing degree is 53% higher than that of the conventional fixed jet spinning device, and the coiled filaments of the tow are avoided.

[0124] Comparative Example 5

[0125] A method for applying texturing points is basically the same as that of Example 10, except that: the nozzle disclosed in CN114318617A is used for intermittent air jetting and applying texturing points;

[0126] After the tow leaves the tow channel, the texturing degree is 9 per meter and the number of coiled filaments is 0.005 per meter.

[0127] Example 11

[0128] A method for applying texturing points is to pass the tow through the tow channel of the texturing device in Example 1 and continuously introduce compressed air into the compressed air channel;

[0129] The tow is 500 dtex / 144 f polyester high-strength industrial yarn, the winding speed is 3250 m / min, the winding tension is 80 cN, and the texturing pressure is 3.0 bar;

[0130] After the tow leaves the tow channel, the texturing degree is 20 per meter and the number of coiled filaments is 0 per meter.

[0131] Comparing Example 11 with Example 9, it can be seen that on the premise that the tow, winding speed, and texturing pressure are the same, when the winding tension fluctuates by 14%, the texturing degree and the number of coiled filaments of the present invention remain stable and unchanged.

[0132] Comparative Example 6

[0133] A method for applying texturing points is basically the same as that of Example 11, except that: the nozzle disclosed in CN114318617A is used for intermittent air jetting and applying texturing points;

[0134] After the tow leaves the tow channel, the texturing degree is 7 per meter and the number of coiled filaments is 0.004 per meter.

[0135] Example 12

[0136] A method for applying texturing points is basically the same as that of Example 11, except that: the winding speed is 3450 m / min;

[0137] After the tow leaves the tow channel, both the texturing degree and the number of coiled filaments are the same as those in Example 11.

[0138] Example 13

[0139] A method of making network dots, in which the tow is passed through the tow channel of the networker in Example 3, and compressed air is continuously introduced into the compressed air channel;

[0140] The tow is 500 dtex / 144f polyester high-strength industrial yarn, the winding speed is 3650 m / min, the winding tension is 75 cN, and the network pressure is 3.0 bar;

[0141] After the tow leaves the tow channel, the network density is 21 pieces / meter and the number of coiled tows is 0 pieces / meter.

Claims

1. A webber, which is internally provided with a tow channel and a compressed air channel. The extending direction of the tow channel is parallel to the front-rear direction, and the compressed air channel is located below the tow channel. It is characterized in that It is also provided with a jet rotation device inside; The jet rotation device is installed at the junction of the tow channel and the compressed air channel; An air flow channel is provided inside the jet rotation device. The air flow channel is the only channel between the tow channel and the compressed air channel, and the extending direction of the air flow channel is perpendicular to the left-right direction; The installation method of the jet rotation device satisfies that when the tow passes through the tow channel, it contacts the jet rotation device and drives the jet rotation device to make a rotational movement around the central axis parallel to the left-right direction; The jet rotation device includes a left convex handle, an ellipsoid, and a right convex handle arranged in sequence along the left-right direction. The major axis of the ellipsoid is parallel to the left-right direction, and the air flow channel is located inside the ellipsoid. The air flow channel is a cylindrical channel.

2. The network device according to claim 1, characterized in that, The length L3 of the jet rotation device along the left-right direction is 14 - 18 mm, the major axis length L2 of the ellipsoid is 8 - 10 mm, the minor axis length L6 of the ellipsoid is 5 - 7 mm, the diameter L1 of the air flow channel is 4 - 6 mm. Both the left convex handle and the right convex handle are cylindrical structures with the central axis parallel to the left-right direction and the same size. The diameter L5 of the right convex handle is 2 - 3 mm. The width of the tow channel along the left-right direction is 5 - 7 mm, and the length of the tow channel along the front-back direction is 35 - 45 mm.

3. The network device according to claim 1, characterized in that The air flow channel passes through the center of the ellipsoid.

4. A network device according to claim 1, characterized in that, The jet rotation device is a ceramic part with a smooth surface, and the surface roughness Ra value is 1.2 - 2.0 μm.

5. A network device according to claim 1, characterized in that, Left and right grooves are provided at the junction of the tow channel and the compressed air channel inside the netting device; The shape of the left groove is the same as the overall shape formed by the left convex handle and the left end of the ellipsoid. The overall shape formed by the left convex handle and the left end of the ellipsoid is embedded in the left groove, and the height of the gap between the two along the up-down direction is 0.05 - 0.1 mm; The shape of the right groove is the same as the overall shape formed by the right convex handle and the right end of the ellipsoid. The overall shape formed by the right convex handle and the right end of the ellipsoid is embedded in the right groove, and the height of the gap between the two along the up-down direction is 0.05 - 0.1 mm; The surfaces of the left and right grooves are smooth-treated, and the surface roughness Ra value is 0.8 - 1.0 μm.

6. A network device according to claim 1, wherein, The extending direction of the compressed air channel is parallel to the up-down direction.

7. A network device according to claim 1, wherein, The netting device is divided into an upper cover layer, an intermediate layer, and a main body layer arranged in sequence from top to bottom. The tow channel is arranged in the intermediate layer, and the compressed air channel is arranged in the main body layer. The tow channel is jointly surrounded by a left wall, a right wall, an upper wall, and a lower wall. The left wall is composed of upper and lower parts. The lower part of the left wall is detachably connected to the lower wall, and there is a gap between the lower part of the left wall and the upper part of the left wall. This gap is the tow inlet.

8. A network device according to claim 7, wherein, The right side surface of the left wall, the left side surface of the right wall, and the lower surface of the upper wall are all planes. The upper surface of the lower wall is a curved surface. This curved surface arches upward along the front-back direction and arches downward along the left-right direction; the right side surface of the left wall and the left side surface of the right wall are both vertical surfaces, the lower surface of the upper wall is a horizontal plane, and the maximum distance between the lower surface of the upper wall and the upper surface of the lower wall is 7 - 9 mm, and the minimum distance between the lower surface of the upper wall and the upper surface of the lower wall is 5 - 7 mm.

9. A method of dotting a network, characterized in that, Adopt a netting device according to any one of claims 1 to 8, pass the tow through the tow channel, and continuously introduce compressed air into the compressed air channel; The tow is 1000 dtex / 96f high-strength polyester industrial yarn, the winding speed is 3000 - 4200 m / min, the winding tension is 180 - 210 cN, the network pressure is 3.5 bar. After the tow leaves the tow channel, the network density is 12 - 16 per meter, and the number of coiled filaments is 0 per meter; Alternatively, the tow is 500 dtex / 144f low-shrinkage polyester industrial yarn, the winding speed is 3250 - 3650 m / min, the winding tension is 70 - 80 cN, the network pressure is 3.0 bar. After the tow leaves the tow channel, the network density is 20 - 21 per meter, and the number of coiled filaments is 0 per meter; When the tows, winding tensions, and network pressures are the same but the winding speeds are different, the network density after the tows leave the tow channels is the same.

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