Network device and network point making method

Abstract

The invention belongs to the technical field of spinning, and relates to an interlacing device and a method for making interlacing points, and the interlacing device is internally provided with a tow channel, a compressed air channel and an air injection 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 air injection rotating device is mounted at the junction of the tow channel and the compressed air channel; an air flow channel is arranged in the air injection rotating device and 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 tows penetrate through the tow channel, the tows make contact with the air injection rotating device and drive the air injection rotating device to rotate around a center shaft parallel to the left-right direction. The method for dotting the network points comprises the steps that the tows penetrate through the tow channel, and compressed air is continuously introduced into the compressed air channel. The network device can meet the requirements of network degree and no generation of loop wires, and the method for dotting the network points saves compressed air and is suitable for large-scale industrial application.

Description

Technical Field

[0001] The invention belongs to the technical field of spinning, and in particular relates to a network device and a method for making network points. Background Art

[0002] In the production process of fiber filaments, the polymer melt is first transported to the spinning box, where the polymer melt is evenly extruded after metering and filtering, and then cooled and solidified to form primary fibers. After the primary fibers are bundled, oiled, stretched and shaped, they are networked by a network device to finally form filaments with a certain entangled structure. The filaments that have been networked have stable, uniform, and dense network points, and the cohesion of the tow is good. They do not diverge during the weaving process and run stably. Therefore, the research on the network method of the tow has important application value.

[0003] The traditional networking method relies on the nozzle of the network device to continuously spray compressed air to impact the tow passing through the tow channel to form network points. The vortex pattern formed by the continuous injection of compressed air causes the tow to vibrate violently at a high frequency and continuously impact the wall of the tow channel of the network device; the higher the network pressure, the higher the network degree (the number of network points formed on each meter of tow), but at the same time, the vibration frequency of the tow in the network device is also higher, and the impact is also stronger. This impact is easy to cause the single filament to be unevenly stretched, thus showing as looped wire; and after the network pressure is large enough, the network degree no longer increases significantly, but increases the probability of looped wire. Therefore, the method of continuously spraying compressed air is difficult to take into account both the requirements of looped wire and network degree.

[0004] For example, patent application CN114318619A which uses continuous injection of compressed air provides a method for improving the network fastness of multifilament networks. A nozzle with two nozzles is designed, which can form vortex effects with different rotation directions in the silk path; wherein, the airflow ejected from nozzle I determines the deflection direction of the multifilament network, and the airflow direction is not aligned with the central axis of the silk path, but only acts on the monofilaments outside the multifilaments, and the ejected airflow forms a rotating vortex in the silk path, so that the outer monofilaments form a wrapping effect on the inner monofilaments; the direction of the rotating vortex formed by the airflow ejected from nozzle II is opposite to that of nozzle I, and nozzle II will not change the deflection direction of the network nodes, but only disrupt and interfere with the direction of the network nodes, thereby obtaining better network fastness and not easy to detach. By using this nozzle, 30~150dtex / 10~40f polyester network multifilaments can be formed, eliminating the twisting or sizing steps, and shortening the weaving process; however, the disadvantage of this method is that the filament bundles are prone to form loops in the rotating vortex.

[0005] Another example is the patent CN220597744U which uses continuous injection of compressed air and discloses a main network device nozzle for industrial yarn without sizing. During use, the vortex formed by the cross airflow of the double nozzles blows the single yarns in the yarn bundle evenly, and is not prone to problems such as lint and broken yarns. Network nodes can be formed in different directions on the side of the yarn bundle. The network nodes have good uniformity in all directions and are not easy to loosen. However, the use of double nozzles in the network device cannot improve the problem of violent shaking of the yarn bundle caused by the continuous injection of compressed air and the collision with the wall of the network device.

[0006] In order to solve the above problems, the prior art proposes a networking method using intermittent injection of compressed air. For example, patent application CN114318617A provides a network composite yarn and its networking method and application, using a double-nozzle nozzle, nozzle I and nozzle II intermittently inject compressed air into the yarn path, when the airflow is turned on, the multifilament bundle is networked to form an intertwined portion, and when it is closed, it is a fiber-opening portion. By adjusting the time difference of the airflow of the two nozzles, the staggered network of nozzles I and II is controlled to avoid the overlap of the intertwined portion I and the intertwined portion II, forming a 30~150dtex / 10~40f fine denier DTY network composite yarn composed of a number of continuous circulation units, each circulation unit is composed of a fiber-opening portion I, an intertwined portion I, a fiber-opening portion II and an intertwined portion II connected in sequence; using the double-nozzle nozzle, by controlling the intertwined portion I and the intertwined portion II The network degree of the intertwining part II is different, so that the intertwining part II has a lower network degree, and the network nodes are easy to open, thereby forming a structure in which the multifilament is partially intertwined and partially opened, which can meet the requirements of no twisting and no sizing; however, the intermittent injection of compressed air in this method is only suitable for the production of network composite yarns with lower winding speeds. It is difficult to accurately control the jet frequency and jet intensity to maintain uniformity under the condition of high winding speed. This is because in the networking process of the tow, it is necessary to punch the same network points on the tows of the same length (for example, 1m). The higher the winding speed, the shorter the time for the tow to pass through the network device, and the jet frequency is difficult to accurately increase synchronously. In addition, when the intensity of the airflow remains unchanged, when the intermittent airflow reaches the tow through a longer compressed air channel, the more the intensity of the intermittent airflow decreases, and the more the force on the tow decreases.

[0007] Therefore, there is an urgent need to develop a networking device and a networking method that can take into account both the degree of yarn networking and the absence of loop yarn 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 to provide a network device and a method for setting network points.

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

[0010] A network device, with a tow channel and a compressed air channel inside, the extension direction of the tow channel is parallel to the front-back direction, the compressed air channel is located below the tow channel, and an air 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 in the jet rotating device, and the air flow channel is the only channel between the tow channel and the compressed air channel, and the extension direction of the air flow channel is perpendicular to the left and 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 a central axis parallel to the left and right directions.

[0014] As the preferred technical solution:

[0015] As described above, the jet rotating device comprises a left convex handle, an elliptical ball, and a right convex handle arranged in sequence along the left-right direction, the long axis of the elliptical ball is parallel to the left-right direction, the airflow channel is located inside the elliptical ball, and the airflow channel is a cylindrical channel.

[0016] As described above, the length L3 of the jet rotating device along the left-right direction is 14-18mm, the length L2 of the major axis of the ellipsoid is 8-10mm, the length L6 of the minor axis of the ellipsoid is 5-7mm, the diameter L1 of the airflow channel is 4-6mm, the left and right lugs are both cylindrical structures, the central axes are parallel to the left-right directions and have the same size, the diameter L5 of the right lug is 2-3mm, the width of the filament channel along the left-right direction is 5-7mm, so that all the filaments in the filament channel can be blown by the airflow at the same time, which is beneficial to the formation of uniform network points of the filaments in the transverse direction, and the length of the filament channel along the front-to-back direction is 35-45mm.

[0017] In a network device as described above, the air flow channel passes through the center of the ellipsoid.

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

[0019] A network device as described above, wherein a left groove and a right groove are provided at the junction of the tow channel and the compressed air channel inside the network device;

[0020] The shape of the left groove is the same as the whole formed by the left convex handle and the left end of the elliptical ball, and the size is slightly larger than the whole formed by the left convex handle and the left end of the elliptical ball, so that the jet rotating device can rotate freely and avoid excessive shaking. The whole formed by the left convex handle and the left end of the elliptical ball is embedded in the left groove, and the height of the gap between the two in the vertical direction is 0.05-0.1mm;

[0021] The shape of the right groove is the same as the whole formed by the right convex handle and the right end of the elliptical ball, and the size is slightly larger than the whole formed by the right convex handle and the right end of the elliptical ball, so that the jet rotating device can rotate freely and avoid excessive shaking. The whole formed by the right convex handle and the right end of the elliptical ball is embedded in the right groove, and the height of the gap between the two in the vertical direction is 0.05-0.1mm;

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

[0023] In the network device as described above, the extension direction of the compressed air channel is parallel to the up-down direction.

[0024] A network device as described above is divided into an upper cover layer, a middle layer and a main body layer which are arranged in sequence from top to bottom, the filament bundle channel is arranged in the middle layer, the compressed air channel is arranged in the main body layer, the filament bundle channel is surrounded by a left wall, a right wall, an upper wall and a lower wall, the left wall is composed of an upper and lower part, the lower part of the left wall is detachably connected to the lower wall, so that the jet rotating device can be easily installed, and a gap is left between the lower part of the left wall and the upper part of the left wall, and the gap is the filament bundle entrance.

[0025] In a network device 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 planes, and the upper surface of the lower wall is a curved surface, which arches upward along the front-to-back direction and arches downward along the left-to-right direction. Such a design is conducive to the filament bundle effectively contacting the jet rotating device, driving the jet rotating 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 7-9mm, and the minimum distance between the lower surface of the upper wall and the upper surface of the lower wall is 5-7mm.

[0026] The present invention also provides a method for making network dots, using a network device as described in any of the above items, passing the filament bundle through the filament bundle channel, and continuously introducing compressed air into the compressed air channel.

[0027] As the preferred technical solution:

[0028] A method for making interlaced dots as described above, wherein the tow is 1000dtex / 96f polyester high-strength industrial yarn, the winding speed is 3000-4200m / min, the winding tension is 180-210cN, the interlaced pressure (i.e., the pressure of compressed air) is 3.5bar, and after the tow leaves the tow channel, the interlaced degree is 12-16 / m, and the number of loops is 0 / m;

[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 jet rotating device of the network device of the present invention is close to the filament bundle. The faster the winding speed, the faster the rotation speed of the jet rotating device. Under the condition of high winding speed, the jet frequency can be accurately controlled and the jet intensity can be kept uniform to form a uniform and stable network point. When the filament bundle, winding tension, and network pressure are the same and the winding speed is different, the network degree of the filament bundle after leaving the filament bundle channel is the same;

[0035] (2) The jet rotating device of the network device of the present invention opens and closes the air flow channel intermittently by rotating, thereby avoiding the formation of looped wires due to the collision between the filament bundle and the inner wall of the filament bundle channel caused by the continuous injection of compressed air;

[0036] (3) The method for making network dots of the present invention uses intermittent injection of compressed air, which can save compressed air, is beneficial to energy saving and consumption reduction, and is suitable for large-scale industrial applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Schematic diagram of the three-dimensional structure of the network device of the present invention, wherein 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 yes Figure 1 AA cross-sectional view of ;

[0039] Figure 3 is a schematic top view of the main layer of the network device of the present invention;

[0040] Figure 4 It is a schematic diagram of the main structure of the jet rotating device of the network device of the present invention;

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

[0042] Figure 6 It is a schematic diagram of the position of the jet rotating device of the air flow channel of the network device of the present invention before the jet starts;

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

[0044] Figure 8 It is a schematic diagram of the position of the jet rotating device of the air flow channel of the network device of the present invention when the jet is finished;

[0045] Among them, 11 is the main body layer, 12 is the compressed air channel, 21 is the non-detachable plate, 22 is the filament channel, 23 is the filament inlet, 31 is the upper cover layer, 41 is the detachable plate, 51 is the jet rotating device, 52 is the right convex handle, 53 is the airflow channel, 54 is the left convex handle, 55 is the ellipsoidal sphere, 61 is the filament bundle, L1 is the diameter of the airflow channel, L2 is the major axis length of the ellipsoidal sphere, L3 is the length of the jet rotating device along the left and right directions, L4 is the length of the airflow channel, L5 is the diameter of the right convex handle, and L6 is the minor axis length of the ellipsoidal sphere. DETAILED DESCRIPTION

[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 are not intended 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 fall within the scope limited by the appended claims of the application equally.

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

[0048] Network degree: The network degree is tested by the manual needle moving method according to FZ / T 50001-2016 standard: measure a 1-meter-long tow, fix one end of the tow, and start from the fixed end. Use a needle to pierce the center of the tow and slide downward. If there is a tangle and resistance in the tow, it is regarded as a network point. Then use the same method from the bottom of the tangle. After the 1-meter-long tow is tested, count the number of network points. Test each tow twice, and take the average number of network points in the two tests, which is the network degree, unit: pieces / meter.

[0049] Number of loop yarns: The yarn bundle is tested using the YIS 200 hairiness detector. Based on the principle of the image method, when the yarn bundle continuously passes through the inspection area of ​​the sight glass, the sight glass continuously collects the two-dimensional information of the yarn bundle and hairiness, and digitally processes the collected arrival image to identify and extract the hairiness on the yarn bundle. Based on the processed image, the operator counts the number of loop yarns by checking and analyzing the yarn bundle morphology. The length of the yarn bundle for a single test is 10,000 meters, the yarn bundle running speed is 400 m / min, and the distance sensitivity is set to count if it is greater than 1,500 µm.

[0050] The number of intermittent injections of compressed air and the jet intensity: A pressure sensor is set on the inner wall of the wire bundle channel that is perpendicular to the compressed air channel to detect the number of intermittent injections of compressed air and the jet intensity. When the pressure of the compressed air acts on the sensor, the metal strain gauge of the sensitive element inside it is deformed. This deformation in turn causes the change of the inductance parameter, converting these pressure changes into a measurable electrical signal output, forming a periodic fluctuation image with time as the horizontal axis and intensity as the vertical axis on the central control display. 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 intermittent injections of compressed air. In addition, a pressure gauge is set on the compressed air channel. The compressed air pressure of the compressed air channel is consistent with the jet intensity of the network device. By checking the displayed data on the pressure gauge, it can be determined whether the jet intensity is stable.

[0051] Surface roughness Ra value: Use the needle-tracing method to detect the surface roughness Ra value, that is, use a diamond stylus to gently scratch the surface of the jet rotating device and the jet rotating device placement area. When the stylus slides, the surface roughness will cause the stylus to move up and down. This displacement causes the inductance of the sensor inductor coil to change, thereby generating an analog signal proportional to the surface roughness at the output end of the phase-sensitive rectifier; the 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 to finally obtain the Ra value.

[0052] Example 1

[0053] A network device, such as Figure 1~2 As shown, it is composed of a main body layer 11, a non-detachable plate 21, an upper cover layer 31, a detachable plate 41 and an air jet rotating device 51, the non-detachable plate 21 and the detachable 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 provided inside the middle layer, and the extension direction of the tow channel 22 is parallel to the front-to-back direction. The tow channel 22 is surrounded by a left wall, a right wall, an upper wall and a lower wall. The left wall is composed of an upper and a lower part. The lower part of the left wall is detachably connected to the lower wall. A detachable plate 41 constitutes the lower part of the left wall. A gap is left between the lower part of the left wall and the upper part of the left wall, and the gap is a 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 planes, and the upper surface of the lower wall is a curved surface, which is arched upward along the front-to-back direction and arched downward along the left-to-right direction. 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] The main body layer 11 is provided with a compressed air channel 12, which 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. Figure 2 and Figure 3 As shown; the jet rotating device 51 is provided with an air flow channel 53, the air flow channel 53 is the only channel between the tow channel 22 and the compressed air channel 12, the extension direction of the air flow channel 53 is perpendicular to the left and right direction, and the extension direction of the compressed air channel 12 is parallel to the up and down direction; as Figure 4 and Figure 5 As shown, the jet rotating device 51 is composed of a left convex handle 54, an elliptical ball 55, and a right convex handle 52 arranged in sequence along the left-right direction. The long axis of the elliptical ball 55 is parallel to the left-right direction. The airflow channel 53 is located in the elliptical ball 55. The airflow channel 53 is a cylindrical channel and passes through the center of the elliptical ball 55.

[0056] The length L3 of the jet rotating device 51 along the left-right direction is 16 mm, the length L2 of the major axis of the ellipsoid 55 is 9 mm, the length L6 of the minor axis of the ellipsoid 55 is 6 mm, the diameter L1 of the airflow channel 53 is 5 mm, the left lug 54 and the right lug 52 are both cylindrical structures, the central axes are parallel to the left-right direction and the size is the same, and the diameter L5 of the right lug 52 is 2 mm; the jet rotating device 51 is a ceramic part with a smooth surface, and 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 in the left-right direction is 5 mm, and the length of the tow channel 22 in the front-back direction is 35 mm;

[0058] A left groove and a right groove are provided at the junction of the tow channel 22 and the compressed air channel 12, and the space between the left groove and the right groove constitutes the placement area of ​​the jet rotating device;

[0059] The shape of the left groove is the same as the whole formed by the left convex handle 54 and the left end of the elliptical ball 55. The whole formed by the left convex handle 54 and the left end of the elliptical ball 55 is embedded in the left groove, and the height of the gap between the two in the vertical direction is 0.08±0.01mm;

[0060] The shape of the right groove is the same as the whole formed by the right convex handle 52 and the right end of the elliptical ball 55. The whole formed by the right convex handle 52 and the right end of the elliptical ball 55 is embedded in the right groove, and the height of the gap between the two in the vertical direction is 0.08±0.01mm; the surfaces of the left groove and the right groove are smoothed, and the surface roughness Ra value of the left groove and the right groove is 0.9±0.1μm;

[0061] During installation, after the jet rotating device 51 is placed in the jet rotating device placement area, the removable plate 41, the non-removable plate 21 and the upper cover layer 31 are covered. The removable plate 41 is located above the main body layer 11, and the three layers of the main body layer 11, the non-removable plate 21 and the upper cover layer 31 are locked with fixing screws. The removable plate 41 and the main body layer 11 are also locked with fixing screws. The removable plate 41 plays the role of fixing the lower part of the left wall. The installation method of the jet rotating device 51 satisfies: 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 and right directions. When the jet rotating device 51 rotates to Figure 6 When the air flow channel 53 is in the position shown, it will start to spray compressed air; when the jet rotating device 51 rotates to Figure 7 When the air flow channel 53 is fully opened to spray compressed air, the air jet rotating device 51 rotates to the position shown in FIG. Figure 8 When in the position shown, the jet rotating device 51 is about to be closed, so that the jet rotating device 51 can dynamically open and close the airflow channel 53 .

[0062] Example 2

[0063] A network device, such as Figure 1~2 As shown, it is composed of a main body layer 11, a non-detachable plate 21, an upper cover layer 31, a detachable plate 41 and an air jet rotating device 51, the non-detachable plate 21 and the detachable 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;

[0064] A tow channel 22 is provided inside the middle layer, and the extension direction of the tow channel 22 is parallel to the front-to-back direction. The tow channel 22 is surrounded by a left wall, a right wall, an upper wall and a lower wall. The left wall is composed of an upper and a lower part. The lower part of the left wall is detachably connected to the lower wall. A detachable plate 41 constitutes the lower part of the left wall. A gap is left between the lower part of the left wall and the upper part of the left wall, and the gap is a 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 planes, and the upper surface of the lower wall is a curved surface, which is arched upward along the front-to-back direction and arched downward along the left-to-right direction. 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 8 mm, and the minimum distance between the lower surface of the upper wall and the upper surface of the lower wall is 6 mm.

[0065] The main body layer 11 is provided with a compressed air channel 12, which 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. Figure 2 and Figure 3As shown; the jet rotating device 51 is provided with an air flow channel 53, the air flow channel 53 is the only channel between the tow channel 22 and the compressed air channel 12, the extension direction of the air flow channel 53 is perpendicular to the left and right direction, and the extension direction of the compressed air channel 12 is parallel to the up and down direction; as Figure 4 and Figure 5 As shown, the jet rotating device 51 is composed of a left convex handle 54, an elliptical ball 55, and a right convex handle 52 arranged in sequence along the left-right direction. The long axis of the elliptical ball 55 is parallel to the left-right direction. The airflow channel 53 is located in the elliptical ball 55. The airflow channel 53 is a cylindrical channel and passes through the center of the elliptical ball 55.

[0066] The length L3 of the jet rotating 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 airflow channel 53 is 6 mm, the left lug 54 and the right lug 52 are both cylindrical structures, the central axes are parallel to the left-right direction and the size is the same, and the diameter L5 of the right lug 52 is 3 mm; the jet rotating device 51 is a ceramic part with a smooth surface, and the surface roughness Ra value of the jet rotating device 51 is 1.6±0.4 μm;

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

[0068] A left groove and a right groove are provided at the junction of the tow channel 22 and the compressed air channel 12, and the space between the left groove and the right groove constitutes the placement area of ​​the jet rotating device;

[0069] The shape of the left groove is the same as the whole formed by the left convex handle 54 and the left end of the elliptical ball 55, and the size is slightly larger than the whole formed by the left convex handle 54 and the left end of the elliptical ball 55. The whole formed by the left convex handle 54 and the left end of the elliptical ball 55 is embedded in the left groove, and the height of the gap between the two in the vertical direction is 0.1±0.01mm;

[0070] The shape of the right groove is the same as the whole formed by the right convex handle 52 and the right end of the elliptical ball 55, and the size is slightly larger than the whole formed by the right convex handle 52 and the right end of the elliptical ball 55. The whole formed by the right convex handle 52 and the right end of the elliptical ball 55 is embedded in the right groove, and the height of the gap between the two along the vertical direction is 0.1±0.01mm; the surfaces of the left groove and the right groove are smoothed, and the surface roughness Ra value of the left groove and the right groove is 0.9±0.1μm;

[0071] During installation, after the jet rotating device 51 is placed in the jet rotating device placement area, the removable plate 41, the non-removable plate 21 and the upper cover layer 31 are covered. The removable plate 41 is located above the main body layer 11, and the three layers of the main body layer 11, the non-removable plate 21 and the upper cover layer 31 are locked with fixing screws. The removable plate 41 and the main body layer 11 are also locked with fixing screws. The removable plate 41 plays the role of fixing the lower part of the left wall. The installation method of the jet rotating device 51 satisfies: 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 and right directions. When the jet rotating device 51 rotates to Figure 6 When the air flow channel 53 is in the position shown, it will start to spray compressed air; when the jet rotating device 51 rotates to Figure 7 When the air flow channel 53 is fully opened to spray compressed air, the air jet rotating device 51 rotates to the position shown in FIG. Figure 8 When in the position shown, the jet rotating device 51 is about to be closed, so that the jet rotating device 51 can dynamically open and close the airflow channel 53 .

[0072] Example 3

[0073] A network device, such as Figure 1~2 As shown, it is composed of a main body layer 11, a non-detachable plate 21, an upper cover layer 31, a detachable plate 41 and an air jet rotating device 51, the non-detachable plate 21 and the detachable 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;

[0074] A tow channel 22 is provided inside the middle layer, and the extension direction of the tow channel 22 is parallel to the front-to-back direction. The tow channel 22 is surrounded by a left wall, a right wall, an upper wall and a lower wall. The left wall is composed of an upper and a lower part. The lower part of the left wall is detachably connected to the lower wall. A detachable plate 41 constitutes the lower part of the left wall. A gap is left between the lower part of the left wall and the upper part of the left wall, and the gap is a 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 planes, and the upper surface of the lower wall is a curved surface, which is arched upward along the front-to-back direction and arched downward along the left-to-right direction. 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 9 mm, and the minimum distance between the lower surface of the upper wall and the upper surface of the lower wall is 7 mm.

[0075] The main body layer 11 is provided with a compressed air channel 12, which 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. Figure 2 and Figure 3As shown; the jet rotating device 51 is provided with an air flow channel 53, the air flow channel 53 is the only channel between the tow channel 22 and the compressed air channel 12, the extension direction of the air flow channel 53 is perpendicular to the left and right direction, and the extension direction of the compressed air channel 12 is parallel to the up and down direction; as Figure 4 and Figure 5 As shown, the jet rotating device 51 is composed of a left convex handle 54, an elliptical ball 55, and a right convex handle 52 arranged in sequence along the left-right direction. The long axis of the elliptical ball 55 is parallel to the left-right direction. The airflow channel 53 is located in the elliptical ball 55. The airflow channel 53 is a cylindrical channel and passes through the center of the elliptical ball 55.

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

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

[0078] A left groove and a right groove are provided at the junction of the tow channel 22 and the compressed air channel 12, and the space between the left groove and the right groove constitutes the placement area of ​​the jet rotating device;

[0079] The shape of the left groove is the same as the whole formed by the left convex handle 54 and the left end of the elliptical ball 55, and the size is slightly larger than the whole formed by the left convex handle 54 and the left end of the elliptical ball 55. The whole formed by the left convex handle 54 and the left end of the elliptical ball 55 is embedded in the left groove, and the height of the gap between the two in the vertical direction is 0.05±0.01mm;

[0080] The shape of the right groove is the same as the whole formed by the right convex handle 52 and the right end of the elliptical ball 55, and the size is slightly larger than the whole formed by the right convex handle 52 and the right end of the elliptical ball 55. The whole formed by the right convex handle 52 and the right end of the elliptical ball 55 is embedded in the right groove, and the height of the gap between the two along the vertical direction is 0.05±0.01mm; the surfaces of the left groove and the right groove are smoothed, and the surface roughness Ra value of the left groove and the right groove is 0.9±0.1μm;

[0081] During installation, after the jet rotating device 51 is placed in the jet rotating device placement area, the removable plate 41, the non-removable plate 21 and the upper cover layer 31 are covered. The removable plate 41 is located above the main body layer 11, and the three layers of the main body layer 11, the non-removable plate 21 and the upper cover layer 31 are locked with fixing screws. The removable plate 41 and the main body layer 11 are also locked with fixing screws. The removable plate 41 plays the role of fixing the lower part of the left wall. The installation method of the jet rotating device 51 satisfies: 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 and right directions. When the jet rotating device 51 rotates to Figure 6 When the air flow channel 53 is in the position shown, it will start to spray compressed air; when the jet rotating device 51 rotates to Figure 7 When the air flow channel 53 is fully opened, the air flow channel 53 is fully opened. Figure 8 When in the position shown, the jet rotating device 51 is about to be closed, so that the jet rotating device 51 can dynamically open and close the airflow channel 53 .

[0082] Example 4

[0083] A method for making a network point, wherein a tow is passed through the tow channel of the network device of embodiment 1, and compressed air is continuously introduced into the compressed air channel;

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

[0085] After the tow leaves the tow channel, the network degree is 12 per meter and the number of loops is 0 per meter.

[0086] Example 5

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

[0088] After the tow leaves the tow channel, the network degree and the number of loops are the same as those in Example 4.

[0089] By comparing Example 4 with Example 5, it can be seen that although the winding speed is increased and the wire output speed in the network device is fast, since the rotation of the jet rotating device is driven by the wire bundle, the rotation speed of the jet rotating device is also accelerated accordingly, so that the network degree of the wire bundle in the network device can be kept stable and uniform, that is, when the wire bundle, winding tension, and network pressure are the same and the winding speeds are different, the network degree of the wire bundle after leaving the wire bundle channel is the same.

[0090] Comparative Example 1

[0091] A method for making a network point is basically the same as that of the fourth embodiment, except that: in the network device used, the jet rotating device is fixed and cannot rotate, and the extension 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 pieces / meter and the number of loops is 0.004 pieces / meter.

[0093] By comparing Example 4 with Comparative Example 1, it can be seen that under the same network pressure, the jet rotating device is fixed, which is no different from the traditional continuous injection of compressed air. Not only is the network degree of the filament bundle low, but it is also easier to produce loop wires.

[0094] Comparative Example 2

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

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

[0097] Comparative Example 3

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

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

[0100] Comparing Comparative Example 2 with Comparative Example 3, it can be seen that when using intermittent jetting of CN114318617A, under the premise of the same filament bundle, winding tension and network pressure, as the winding speed increases, the filament bundle outlet speed in the network device increases and the network degree decreases.

[0101] Example 6

[0102] A method for making a network point, wherein a tow is passed through the tow channel of the network device of embodiment 2, and compressed air is continuously introduced into the compressed air channel;

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

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

[0105] Example 7

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

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

[0108] Example 8

[0109] A method for making a network point, wherein a tow is passed through the tow channel of the network device of embodiment 3, and compressed air is continuously introduced into the compressed air channel;

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

[0111] After the tow leaves the tow channel, the network degree is 12 per meter and the number of loops is 0 per meter.

[0112] Example 9

[0113] A method for making a network point, wherein a tow is passed through the tow channel of the network device of embodiment 1, and compressed air is continuously introduced into the compressed air channel;

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

[0115] After the tow leaves the tow channel, the network degree is 20 / m and the number of loops is 0 / m.

[0116] Example 10

[0117] A method for making a network dot, which is basically the same as that of Example 9, except that the winding speed is 3650 m / min;

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

[0119] By comparing Example 10 with Example 9, it can be seen that under the premise of the same yarn bundle, winding tension and network pressure, the winding speed fluctuates by 12%, and the network degree and the number of coils of the present invention remain stable.

[0120] Comparative Example 4

[0121] A method for making a network point is basically the same as that of embodiment 10, except that: in the network device used, the jet rotating device is fixed and cannot rotate, and the extension direction of the air flow channel is parallel to the up-down direction;

[0122] After the tow leaves the tow channel, the network degree is 13 pieces / m and the number of loops is 0.008 pieces / m.

[0123] By comparing Example 10 with Comparative Example 4, it can be seen that the fine denier 500dtex / 144f polyester high-strength industrial yarn is interlaced using the present invention, and its interlacing degree is 53% higher than that of the conventional fixed jet rotating device, and the yarn bundle loops are avoided.

[0124] Comparative Example 5

[0125] A method for making a network dot, which is basically the same as that of embodiment 10, except that: the nozzle disclosed in CN114318617A is used for intermittent air jetting and making a network dot;

[0126] After the tow leaves the tow channel, the network degree is 9 per meter and the number of loops is 0.005 per meter.

[0127] Embodiment 11

[0128] A method for making a network point, wherein a tow is passed through the tow channel of the network device of embodiment 1, and compressed air is continuously introduced into the compressed air channel;

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

[0130] After the tow leaves the tow channel, the network degree is 20 / m and the number of loops is 0 / m.

[0131] By comparing Example 11 with Example 9, it can be seen that under the premise of the same filament bundle, winding speed and network pressure, the winding tension fluctuates by 14%, and the network degree and the number of coils of the present invention remain stable.

[0132] Comparative Example 6

[0133] A method for making a network dot, which is basically the same as that of embodiment 11, except that: the nozzle disclosed in CN114318617A is used for intermittent air jetting and making a network dot;

[0134] After the tow leaves the tow channel, the network degree is 7 pieces / m and the number of loops is 0.004 pieces / m.

[0135] Example 12

[0136] A method for making a network dot, which is basically the same as Example 11, except that the winding speed is 3450 m / min;

[0137] After the tow leaves the tow channel, the network degree and the number of loops are the same as those in Example 11.

[0138] Embodiment 13

[0139] A method for making a network point, wherein a tow is passed through the tow channel of the network device of embodiment 3, and compressed air is continuously introduced into the compressed air channel;

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

[0141] After the tow leaves the tow channel, the network degree is 21 per meter and the number of loops is 0 per meter.

Claims

1. A network device, with a tow channel and a compressed air channel inside, the extension direction of the tow channel is parallel to the front-back direction, and the compressed air channel is located below the tow channel, characterized in that: There is also a jet rotating device inside; The jet rotating device is installed at the junction of the tow channel and the compressed air channel; An air flow channel is provided in the jet rotating device, and the air flow channel is the only channel between the tow channel and the compressed air channel, and the extension direction of the air flow channel is perpendicular to the left and right direction; 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 a central axis parallel to the left and right directions.

2. A network device according to claim 1, characterized in that: The jet rotating device comprises a left convex handle, an elliptical ball and a right convex handle which are arranged in sequence along the left and right directions. The long axis of the elliptical ball is parallel to the left and right directions. The airflow channel is located in the elliptical ball and is a cylindrical channel.

3. A network device according to claim 2, characterized in that: The length L3 of the jet rotating device along the left-right direction is 14-18mm, the length L2 of the major axis of the ellipsoid is 8-10mm, the length L6 of the minor axis of the ellipsoid is 5-7mm, the diameter L1 of the airflow channel is 4-6mm, the left and right lugs are both cylindrical structures, the central axes are parallel to the left-right directions and the size is the same, the diameter L5 of the right lug is 2-3mm, the width of the filament channel along the left-right direction is 5-7mm, and the length of the filament channel along the front-back direction is 35-45mm.

4. A network device according to claim 2, characterized in that: The air flow channel passes through the center of the ellipsoid.

5. A network device according to claim 2, characterized in that: The jet rotating device is a ceramic part with a smooth surface, and the surface roughness Ra value is 1.2-2.0μm.

6. A network device according to claim 2, characterized in that: A left groove and a right groove are provided at the junction of the tow channel and the compressed air channel inside the network device; The shape of the left groove is the same as the whole formed by the left convex handle and the left end of the elliptical ball. The whole formed by the left convex handle and the left end of the elliptical ball is embedded in the left groove, and the height of the gap between the two in the vertical direction is 0.05-0.1mm; The shape of the right groove is the same as the whole formed by the right convex handle and the right end of the elliptical ball. The whole formed by the right convex handle and the right end of the elliptical ball is embedded in the right groove, and the height of the gap between the two in the vertical direction is 0.05-0.1mm; The surfaces of the left groove and the right groove are smoothed, and the surface roughness Ra value is 0.8-1.0 μm.

7. A network device according to claim 2, characterized in that: The extension direction of the compressed air channel is parallel to the up-down direction.

8. A network device according to claim 2, characterized in that: The network device is divided into an upper cover layer, a middle layer and a main body layer which are arranged in sequence from top to bottom. The filament bundle channel is arranged in the middle layer, and the compressed air channel is arranged in the main body layer. The filament bundle channel is surrounded by a left wall, a right wall, an upper wall and a lower wall. The left wall is composed of an upper and lower part. The lower part of the left wall is detachably connected to the lower wall. A gap is left between the lower part of the left wall and the upper part of the left wall, and the gap is the filament bundle entrance.

9. A network device according to claim 8, characterized in that: 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, and the upper surface of the lower wall is a curved surface, which is arched upward along the front-to-back direction and arched downward along the left-to-right direction; 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 7-9mm, and the minimum distance between the lower surface of the upper wall and the upper surface of the lower wall is 5-7mm.

10. A method for making a network point, characterized in that: Using a network device as described in any one of claims 1 to 9, passing the tow through the tow channel, and continuously passing compressed air into the compressed air channel; The tow is 1000dtex / 96f polyester high-strength industrial yarn, the winding speed is 3000-4200m / min, the winding tension is 180-210cN, the network pressure is 3.5bar, and after the tow leaves the tow channel, the network degree is 12-16 pieces / m, and the number of loops is 0 pieces / m; 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; 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.

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