An air-jet texturing device for ply industrial yarn and a method for creating texturing points on ply industrial yarn

Abstract

The present invention belongs to the technical field of spinning, and relates to an air-jet texturing device for ply industrial yarns and a method for texturing ply industrial yarns. Inside the air-jet texturing device for ply industrial yarns, there are a tow channel, an air-jet rotating device, a first compressed air channel and a second compressed air channel. The extending direction of the tow channel is parallel to the front-rear direction. The first compressed air channel is located below the tow channel, and the second compressed air channel is located above the tow channel and behind the first compressed air channel at the same time. The first compressed air channel and the second compressed air channel are arranged at intervals along the front-rear direction. The method for texturing ply industrial yarns uses the above-mentioned air-jet texturing device for ply industrial yarns, passes the ply industrial yarns through the tow channel, and continuously feeds compressed air into the first compressed air channel and the second compressed air channel. The method for texturing ply industrial yarns of the present invention can form a ply yarn combining single-strand entanglement and single-filament entanglement, achieve high texturing degree and high tenacity retention rate, and can save compressed air, achieving energy conservation and consumption reduction.

Description

Technical Field

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

[0002] Coarse denier polyester industrial yarns are widely used in fields such as conveyor belts, road grids, and flexible slings. However, since the maximum fineness of polyester industrial yarns produced by the one-step method can only reach 9000D, while in actual application fields, the coarse denier polyester industrial yarns reach 100,000D. Such products can only be produced by the ply method. By plying multiple strands of industrial yarns into one strand, the uniform stability of the coarse denier industrial yarns during processing and use is ensured, which is beneficial to improving the overall tensile strength and load-bearing capacity of the yarn bundle, and reducing the overall performance decline caused by the breakage of a single filament. This is particularly important for application scenarios that need to bear large loads. It can be seen that ply industrial yarns have important application value.

[0003] Although the single-strand industrial yarns used for plying have good texturing points and single-strand cohesion, after plying, due to problems such as gaps and overlaps easily occurring between single strands, the cohesion of the yarn bundle and the uniform dispersion of single filaments are affected, which is not conducive to improving the texturing degree and will also cause a significant decrease in strength. Therefore, after plying, it is necessary to use an air-jet texturing device to impact the yarn bundle with air flow to improve the texturing degree and strength retention rate of the ply industrial yarns.

[0004] Conventional single-hole air-jet texturing devices can make the yarn bundle form a single-filament entanglement structure, but it is difficult to form a single-filament entanglement structure through the position exchange between single strands. This is mainly because the ply industrial yarns have a large fineness, there are many single strands in a bundle of yarns and they have texturing nodes. It is necessary to precisely control not only the tension and speed of the yarn bundle during the texturing process, but also the texturing pressure (the strength of the compressed air for texturing). If the texturing pressure used is too low, it is difficult for the ply industrial yarns to form a single-filament entanglement structure, the cohesion of the yarn bundle is poor, and the single filaments are prone to break away from the main body and slip easily during the stretching process, resulting in uneven stretching fracture and a low strength retention rate. If the texturing pressure is too high, although the cohesion between single strands of the ply industrial yarns is improved, under the impact of high-pressure air flow, the uniform arrangement of single filaments decreases, also causing strength loss, thereby affecting the strength retention rate. Therefore, the existing air-jet texturing devices cannot improve both the texturing degree and the strength retention rate of ply industrial yarns at the same time.

[0005] Therefore, in order to improve both the texturing degree and the strength retention rate of ply industrial yarns at the same time, it is necessary to develop an air-jet texturing device for ply industrial yarns and a method for creating texturing points on ply industrial yarns. Summary of the Invention

[0006] The object of the present invention is to solve the above problems existing in the prior art, and provide an air-jet texturing device for ply industrial yarns and a method for creating texturing points on ply industrial yarns.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] A texturing device for ply industrial yarn has a tow channel and a first compressed air channel inside. The extending direction of the tow channel is parallel to the front-rear direction. The first compressed air channel is located below the tow channel, and a jet rotating device and a second compressed air channel are also provided inside;

[0009] The jet rotating device is installed at the junction of the tow channel and the first compressed air channel;

[0010] 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 first compressed air channel;

[0011] The installation mode 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;

[0012] The jet rotating device includes a left fixed handle, an ellipsoid, a right fixed handle, and a right positioning 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 in a Y shape, with the upper end being air flow outlet a and air flow outlet b, and the lower end being air flow outlet c. Air flow outlet a and air flow outlet b are arranged at intervals along the left-right direction;

[0013] The inner surface of the tow channel is jointly composed of an upper curved surface and a lower curved surface; the upper curved surface is a semi-circular arc surface, and such a design is beneficial for the tow to fully spread out;

[0014] The left edge of the semi-circular arc surface is directly above the junction of the left fixed handle and the ellipsoid, and the right edge of the semi-circular arc surface is directly above the junction of the right fixed handle and the ellipsoid;

[0015] The gap between the right edge of the semi-circular arc surface and the junction of the right fixed handle and the ellipsoid extends to the right to communicate with the outside air, forming a tow inlet. The height of the tow inlet in the up-down direction is 2 - 4 mm;

[0016] The second compressed air channel is located above the tow channel and at the rear of the first compressed air channel at the same time. The first compressed air channel and the second compressed air channel are arranged at intervals along the front-rear direction.

[0017] As a preferred technical solution:

[0018] For a texturing device for ply industrial yarn as described above, air flow outlet a, air flow outlet b, and air flow outlet c are circular. The diameters of air flow outlet a and air flow outlet b are 3 - 4 mm, and the diameter of air flow outlet c is 5 - 6 mm; the center of the orthographic projection of air flow outlet c coincides with the center of the orthographic projection of the ellipsoid.

[0019] A texturing device for composite industrial yarn as described above, the major axis length of the ellipsoid is 10 - 15 mm, and the minor axis length of the ellipsoid is 6 - 8 mm;

[0020] The left fixing handle, the right fixing handle, and the right positioning handle are all cylindrical structures, and their central axes are parallel to the left - right direction;

[0021] The left fixing handle and the right fixing handle have the same diameter, and the value range is 2 - 3 mm. The left fixing handle and the right fixing handle have the same length, and the value range is 8 - 10 mm;

[0022] The diameter of the right positioning handle is 1.5 - 2 mm, and the length of the right positioning handle is 2 - 3 mm;

[0023] The jet - rotating device is a ceramic part with a smooth surface, and the surface roughness Ra value is 1.2 - 2.0 μm.

[0024] A texturing device for composite industrial yarn as described above, at the junction of the yarn bundle channel and the first compressed - air channel inside the texturing device for composite industrial yarn, there are a left groove and a right groove;

[0025] The shape of the left groove is the same as that of the left fixing handle. The left fixing handle is embedded in the left groove, and the height of the gap between the two in the up - down direction is 0.05 - 0.1 mm;

[0026] The shape of the right groove is the same as the whole formed by the right fixing handle and the right positioning handle. The whole formed by the right fixing handle and the right positioning handle is embedded in the right groove, and the height of the gap between the two in the up - down direction is 0.05 - 0.1 mm;

[0027] The surfaces of the left groove and the right groove are treated smoothly, and the surface roughness Ra value is 0.8 - 1.0 μm.

[0028] A texturing device for composite industrial yarn as described above, the lower curved surface arches upward in the front - back direction and arches downward in the left - right direction; the maximum height of the yarn bundle channel in the up - down direction is 8 - 12 mm, and the minimum height is 6 - 10 mm; the length of the yarn bundle channel in the front - back direction is 40 - 60 mm.

[0029] A texturing device for composite industrial yarn as described above, the distance between the first compressed - air channel and the second compressed - air channel in the front - back direction is 25 - 30 mm.

[0030] A texturing device for composite industrial yarn as described above, the extending direction of the first compressed - air channel is parallel to the up - down direction. The first compressed - air channel is a cylindrical structure with a diameter of 4 - 6 mm;

[0031] The second compressed - air channel is composed of an air - inlet channel, a pressure - stabilizing chamber, and a jet - channel which are arranged in sequence from top to bottom and are connected;

[0032] The extending directions of both the air inlet channel and the injection channel are parallel to the up-down direction;

[0033] The air inlet channel is of a cylindrical structure with a diameter of 5 - 6 mm; the pressure stabilizing chamber is of a cubic structure with a length of 8 - 10 mm in the left-right direction, a length of 5 - 6 mm in the front-back direction, and a height of 3 - 4 mm in the up-down direction; the injection channel is of a cylindrical structure with a diameter of 2 - 3 mm and a length of 3 - 4 mm in the up-down direction;

[0034] The number of injection channels is 3 and they are arranged in parallel in the left-right direction. In this way, three airflows can form point impacts on the thick filament bundle, effectively penetrating the filament bundle, thereby achieving the loosening effect. The second compressed air channel constitutes the loosening area of the network device for combined industrial yarns (the jet rotating device and the first compressed air channel constitute the networking area of the network device for combined industrial yarns).

[0035] For a network device for combined industrial yarns as described above, the network device for combined industrial yarns is divided into an upper cover layer, an intermediate layer, and a main body layer arranged in sequence from top to bottom. The filament bundle channel is arranged in the intermediate layer, the first compressed air channel is arranged in the main body layer, and the second compressed air channel is arranged in the upper cover layer and the intermediate layer.

[0036] The present invention also provides a method for making network points on combined industrial yarns. Using a network device for combined industrial yarns as described in any one of the above, the combined industrial yarn is passed through the filament bundle channel, and compressed air is continuously introduced into the first compressed air channel and the second compressed air channel.

[0037] As a preferred technical solution:

[0038] For a method for making network points on combined industrial yarns as described above, the specifications of the combined industrial yarn are 8000D / 768f - 100000D / 9600f, the winding speed is 400 - 1000 m / min, the winding tension is 500 - 5000 cN, the network pressure of the first compressed air channel is 4 - 8 bar, the network pressure of the second compressed air channel is 4 - 8 bar. After the filament bundle leaves the filament bundle channel, the network degree is 10 - 15 per meter, and the strength retention rate is 95% - 98%. The biggest problem with combined industrial yarn is that after combination, the strength retention rate of the product will decrease. The reason for the decrease in the strength retention rate is that the uniformity of the arrangement of single filaments in the filament bundle of combined industrial yarn will decrease, resulting in uneven stress during the stretching process and a decrease in strength. While ensuring a high network degree, the present invention improves the uniformity of single filaments, and the filament bundle is stressed evenly during the stretching process, so the strength retention rate is improved.

[0039] The principle of the present invention is as follows:

[0040] Traditional ply yarn network technology forms a single-filament winding structure by continuously jetting high-pressure air flow from a network nozzle to impact the filament passing through the filament channel of the network device. Due to the large fineness of ply industrial yarns, the conventional 4-bar network pressure is difficult to blow away the filaments in the filament channel of the network device and form an effective single-strand entanglement structure. As the network pressure increases, the number of single-strand entanglements of ply industrial yarns increases. However, due to the excessive network pressure, some single filaments curl and stretch during high-frequency turbulent vibration, forming many loops of filaments on the surface of the filament bundle, and the arrangement uniformity of the single filaments will decrease, resulting in a decrease in the tensile strength of ply industrial yarns.

[0041] In the present invention, the structure of the network device is specially designed. When the ply industrial yarn runs in the filament channel, it is first affected by the low-pressure air flow jetted from the second compressed air channel. During this process, the single filaments in the ply industrial yarn are blown loose and evenly, and the voids and overlapping structures in the ply industrial yarn are eliminated. When the ply industrial yarn continues to run in the filament channel, it will be further affected by the high-pressure air flow jetted from the first compressed air channel. Since a jet rotation device is installed at the junction of the filament channel and the first compressed air channel, when the filament bundle passes through the filament channel, it contacts the jet rotation device and drives the jet rotation device to rotate around the central axis parallel to the left-right direction. An air flow channel is provided in the jet rotation device. When the jet rotation device rotates, the air flow channel is sometimes connected to the filament channel and the first compressed air channel, and sometimes not connected to the filament channel and the first compressed air channel. Therefore, the high-pressure air flow is periodically jetted onto the ply industrial yarn, causing the ply industrial yarn to form an effective winding structure.

[0042] Ply industrial yarns have a large fineness, many single strands in a filament bundle, and network nodes. Conventional single-hole network devices can make the filament bundle form a single-filament entanglement structure, but it is difficult to form a single-strand entanglement structure through the position exchange between single strands. Therefore, it is necessary to blow compressed air on both sides of the ply industrial yarn to exchange the positions between the single strands on both sides and the single strands in the middle position, forming an effective single-strand winding structure, thereby improving the cohesion and the strength retention rate of ply industrial yarns. For this purpose, the upper end of the air flow channel in the present invention is provided with air flow outlets a and b, and the lower end is provided with air flow outlet c. In the initial state, the air flow passing through the jet rotation device is a double-strand air flow, mainly jetting the fibers on both sides of the ply industrial yarn. After the jet rotation device rotates 180°, the air flow passing through the jet rotation device is a single-strand air flow, evenly jetting on the fibers in the ply industrial yarn. The double-strand air flow and the single-strand air flow are alternately jetted on the ply industrial yarn. The double-strand air flow blows the fibers on both sides of the ply industrial yarn, causing the fibers on both sides to vibrate and entangle, and at the same time, the fibers on both sides exchange positions with the middle fibers. The single-strand air flow evenly blows the entire filament bundle after the position exchange, and a uniform entanglement structure is formed between the single filaments of the entire filament bundle. The alternating action of the double-strand air flow and the single-strand air flow can make the ply industrial yarn form a stable single-strand entanglement structure and single-filament entanglement structure, thereby improving the cohesion of the ply industrial yarn and having a high strength retention rate during use.

[0043] Beneficial effects:

[0044] (1) The texturing device for ply industrial yarn of the present invention uses the low-pressure air flow ejected through the second compressed air passage to loosen the ply industrial yarn in advance, and then, through the port differences of the air flow passages of the jet rotating device, uses single-strand and double-strand air flows to alternately impact the yarn bundle. By changing the air flow pattern impacting the yarn bundle and changing the single high-frequency vibration state, a differential yarn bundle shaking and entanglement pattern is formed, forming a ply yarn combining a single-strand entanglement structure and a single-filament entanglement structure, improving the bundle cohesion and single-filament uniformity of the ply industrial yarn, and achieving a high texturing degree and a high strength retention rate of the yarn bundle.

[0045] (2) The method for making texturing points of the present invention adopts a combined jetting method of continuous jetting and intermittent jetting, which can save compressed air and achieve the purpose of energy conservation and consumption reduction. Description of the drawings

[0046] Figure 1 is the technological flowchart of the texturing process for ply industrial yarn;

[0047] Figure 2 is the side view schematic diagram of the functional areas (loosening area and texturing area) of the texturing device for ply industrial yarn of the present invention;

[0048] Figure 3 is the top view schematic diagram of the functional areas (loosening area and texturing area) of the texturing device for ply industrial yarn of the present invention;

[0049] Figure 4 is the bottom view schematic diagram of the upper cover layer of the texturing device for ply industrial yarn of the present invention;

[0050] Figure 5 is the side view schematic diagram of the upper cover layer of the texturing device for ply industrial yarn of the present invention;

[0051] Figure 6 is the bottom view schematic diagram of the middle layer of the texturing device for ply industrial yarn of the present invention;

[0052] Figure 7 is the side view schematic diagram of the middle layer of the texturing device for ply industrial yarn of the present invention;

[0053] Figure 8 is the structural schematic diagram of the loosening area (second compressed air passage) of the texturing device for ply industrial yarn of the present invention;

[0054] Figure 9 is the structural schematic diagram of the texturing area (jet rotating device and first compressed air passage) of the texturing device for ply industrial yarn of the present invention;

[0055] Figure 10It is a schematic structural diagram of the jet rotation device of the texturing device for ply industrial yarn of the present invention;

[0056] Among them, 1 is the upper cover layer, 2 is the intermediate layer, 3 is the main body layer, 4 is the jet rotation device, 5 is the tow channel, 101 is the air inlet channel, 102 is the pressure stabilizing chamber, 103 is the injection channel, 201 is the hanging-in channel, 301 is the first compressed air channel, 401 is the left fixing handle, 402 is the ellipsoid, 403 is the air flow outlet a, 404 is the air flow outlet c, 405 is the air flow outlet b, 406 is the right positioning handle, 407 is the right fixing handle, 408 is the air flow channel, L1 is the major axis length of the ellipsoid, and L2 is the length of the right positioning handle. Specific embodiments

[0057] 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.

[0058] The following are the relevant performance detection methods for each example and comparative example:

[0059] (1) Tow texturing degree: The texturing degree is tested by the manual needle-shifting method according to the standard of FZ / T 50001-2016: Measure a 1-meter-long tow, fix one end of the tow, start from the fixed end, pierce the center of the tow with a needle and slide it downwards. When there is entanglement and resistance in the tow, it is regarded as a texturing point. Then start the same operation from below the entanglement until the 1-meter-long tow is tested. Count the number of texturing points; each tow is tested twice, and the average value of the number of texturing points in the two tests is taken as the texturing degree, unit: pieces / meter.

[0060] (2) Tensile strength retention rate: The breaking strength is tested according to the standard of GB / T 16604-2017, the tensile speed is 300 mm / min, and the clamping length is 250 mm; the test equipment for the breaking strength is a tensile strength tester produced by Suzhou Tuobo Machinery Co., Ltd., model TH-8201A; the tensile strength retention rate = (breaking strength of ply yarn / sum of breaking strengths of single-ply yarns) × 100%.

[0061] Example A1

[0062] A texturing device for ply industrial yarn, as Figure 2 shown, is divided into an upper cover layer 1, an intermediate layer 2 and a main body layer 3 arranged in sequence from top to bottom;

[0063] As Figures 2 - 3As shown in the figure, the inside of the texturing device for ply industrial yarn is provided with a tow channel 5, a first compressed air channel 301, a second compressed air channel, and a jet rotating device 4; the tow channel 5 is arranged in the middle layer 2, the first compressed air channel 301 is arranged in the main body layer 3, and the second compressed air channel is arranged in the upper cover layer 1 and the middle layer 2; the extending direction of the tow channel 5 is parallel to the front-back direction, the first compressed air channel 301 is located below the tow channel 5, and the second compressed air channel is located above the tow channel 5 and behind the first compressed air channel 301 at the same time; the first compressed air channel 301 and the second compressed air channel are arranged at an interval of 28 mm in the front-back direction; the extending direction of the first compressed air channel 301 is parallel to the up-down direction, and the first compressed air channel 301 is a cylindrical structure with a diameter of 5 mm;

[0064] As Figures 4 - 8 shown in the figure, the second compressed air channel is composed of an air inlet channel 101, a pressure stabilizing chamber 102, and a jet channel 103 which are arranged in sequence from top to bottom and communicated; the extending directions of the air inlet channel 101 and the jet channel 103 are both parallel to the up-down direction; the air inlet channel 101 is a cylindrical structure with a diameter of 5 mm; the pressure stabilizing chamber 102 is a cube structure with a length of 9 mm in the left-right direction, a length of 5 mm in the front-back direction, and a height of 3 mm in the up-down direction; the jet channel 103 is a cylindrical structure with a diameter of 2 mm and a length of 3 mm in the up-down direction; the number of the jet channels 103 is 3 and they are arranged in parallel in the left-right direction;

[0065] As Figures 9 - 10 shown in the figure, the jet rotating device 4 is provided with an air flow channel 408, and the air flow channel 408 is the only channel between the tow channel 5 and the first compressed air channel 301; the jet rotating device 4 is composed of a left fixed handle 401, an ellipsoid 402, a right fixed handle 407, and a right positioning handle 406 which are arranged in sequence in the left-right direction. The major axis of the ellipsoid 402 is parallel to the left-right direction. The air flow channel 408 is arranged inside the ellipsoid 402. The air flow channel 408 is in a Y shape, with an air flow outlet a 403 and an air flow outlet b 405 at the upper end and an air flow outlet c 404 at the lower end. The air flow outlet a 403 and the air flow outlet b 405 are arranged at an interval in the left-right direction; the center of the orthographic projection of the air flow outlet c 404 coincides with the center of the orthographic projection of the ellipsoid 402; the left fixed handle 401, the right fixed handle 407, and the right positioning handle 406 are all cylindrical structures with the central axes parallel to the left-right direction; the jet rotating device 4 is a ceramic part with a smooth surface, and the surface roughness Ra value is 1.6 μm;

[0066] As Figure 10As shown in the figure, the major axis length L1 of the ellipsoid 402 is 12 mm, and the minor axis length of the ellipsoid 402 is 7 mm; the diameters of the left fixing handle 401 and the right fixing handle 407 are the same and the value range is 2 mm, and the lengths of the left fixing handle 401 and the right fixing handle 407 are the same and the value range is 9 mm; the diameter of the right positioning handle 406 is 1.8 mm, and the length L2 of the right positioning handle 406 is 2 mm; the air outlets a 403, air outlets b 405, and air outlet c 404 are circular, the diameters of the air outlets a 403 and air outlets b 405 are 3 mm, and the diameter of the air outlet c 404 is 5 mm;

[0067] As Figures 9 - 10 shown, the inner surface of the tow channel 5 is jointly composed of an upper curved surface and a lower curved surface; the upper curved surface is a semi-circular arc surface; the left edge of the semi-circular arc surface is directly above the junction of the left fixing handle 401 and the ellipsoid 402, and the right edge of the semi-circular arc surface is directly above the junction of the right fixing handle 407 and the ellipsoid 402; the gap between the right edge of the semi-circular arc surface and the junction of the right fixing handle 407 and the ellipsoid 402 extends to the right to communicate with the outside air, forming a tow inlet, and the height of the tow inlet in the up-down direction is 3 mm; the lower curved surface arches upward in the front-back direction and arches downward in the left-right direction; the maximum height of the tow channel 5 in the up-down direction is 10 mm, and the minimum height is 8 mm; the length of the tow channel 5 in the front-back direction is 50 mm;

[0068] As Figures 9 - 10 shown, left and right grooves are provided at the junction of the tow channel 5 and the first compressed air channel 301; the shape of the left groove is the same as that of the left fixing handle 401, and the left fixing handle 401 is embedded in the left groove, and the height of the gap between the two in the up-down direction is 0.08 mm; the shape of the right groove is the same as the overall shape formed by the right fixing handle 407 and the right positioning handle 406, and the overall shape formed by the right fixing handle 407 and the right positioning handle 406 is embedded in the right groove, and the height of the gap between the two in the up-down direction is 0.08 mm. The surfaces of the left groove and the right groove are smooth, and the surface roughness Ra value is 0.9 μm, so that the jet rotating device 4 is installed at the junction of the tow channel 5 and the first compressed air channel 301;

[0069] As Figures 8 - 9 shown, the installation method of the jet rotating device 4 satisfies that the tow passes through the hanging channel 201 and enters the tow channel 5. When the tow passes through the tow channel 5, it contacts the jet rotating device 4 and drives the jet rotating device 4 to rotate around the central axis parallel to the left-right direction.

[0070] Example A2

[0071] A texturing device for ply industrial yarn, as Figure 2 shown, is divided into an upper cover layer 1, an intermediate layer 2, and a main body layer 3 arranged in sequence from top to bottom;

[0072] As shown Figures 2 - 3 in the figure, the inside of the air-jet texturing device for multifilament industrial yarn is provided with a tow channel 5, a first compressed air channel 301, a second compressed air channel and an air-jet rotating device 4; the tow channel 5 is arranged in the middle layer 2, the first compressed air channel 301 is arranged in the main body layer 3, and the second compressed air channel is arranged in the upper cover layer 1 and the middle layer 2; the extending direction of the tow channel 5 is parallel to the front-back direction, the first compressed air channel 301 is located below the tow channel 5, and the second compressed air channel is located above the tow channel 5 and behind the first compressed air channel 301 at the same time; the first compressed air channel 301 and the second compressed air channel are arranged at an interval of 30 mm in the front-back direction; the extending direction of the first compressed air channel 301 is parallel to the up-down direction, and the first compressed air channel 301 is of a cylindrical structure with a diameter of 6 mm;

[0073] As shown Figures 4 - 8 in the figure, the second compressed air channel is composed of an air inlet channel 101, a pressure stabilizing chamber 102 and a jet channel 103 which are arranged in sequence from top to bottom and communicated with each other; the extending directions of the air inlet channel 101 and the jet channel 103 are both parallel to the up-down direction; the air inlet channel 101 is of a cylindrical structure with a diameter of 6 mm; the pressure stabilizing chamber 102 is of a cube structure with a length of 10 mm in the left-right direction, a length of 6 mm in the front-back direction and a height of 4 mm in the up-down direction; the jet channel 103 is of a cylindrical structure with a diameter of 3 mm and a length of 4 mm in the up-down direction; the number of the jet channels 103 is 3 and they are arranged in parallel in the left-right direction;

[0074] As shown Figures 9 - 10 in the figure, an air flow channel 408 is arranged in the air-jet rotating device 4, and the air flow channel 408 is the only channel between the tow channel 5 and the first compressed air channel 301; the air-jet rotating device 4 is composed of a left fixed handle 401, an ellipsoid 402, a right fixed handle 407 and a right positioning handle 406 which are arranged in sequence in the left-right direction. The major axis of the ellipsoid 402 is parallel to the left-right direction. An air flow channel 408 is arranged in the ellipsoid 402. The air flow channel 408 is in a Y shape, with an air flow outlet a 403 and an air flow outlet b 405 at the upper end and an air flow outlet c 404 at the lower end. The air flow outlet a 403 and the air flow outlet b 405 are arranged at an interval in the left-right direction; the center of the orthographic projection of the air flow outlet c 404 coincides with the center of the orthographic projection of the ellipsoid 402; the left fixed handle 401, the right fixed handle 407 and the right positioning handle 406 are all of a cylindrical structure and the central axes are parallel to the left-right direction; the air-jet rotating device 4 is a ceramic part with a smooth surface, and the surface roughness Ra value is 2.0 μm;

[0075] As shown Figure 10As shown, the major axis length L1 of the ellipsoid 402 is 15 mm, and the minor axis length of the ellipsoid 402 is 8 mm; the left fixed handle 401 and the right fixed handle 407 have the same diameter with a value range of 3 mm, and the left fixed handle 401 and the right fixed handle 407 have the same length with a value range of 10 mm; the right positioning handle 406 has a diameter of 2 mm, and the length L2 of the right positioning handle 406 is 3 mm; the air outlets a 403, air outlets b 405, and air outlet c 404 are circular, the air outlets a 403 and air outlets b 405 have a diameter of 4 mm, and the air outlet c 404 has a diameter of 6 mm;

[0076] As Figures 9 - 10 shown, the inner surface of the tow channel 5 is jointly composed of an upper curved surface and a lower curved surface; the upper curved surface is a semi-circular arc surface; the left edge of the semi-circular arc surface is directly above the junction of the left fixed handle 401 and the ellipsoid 402, and the right edge of the semi-circular arc surface is directly above the junction of the right fixed handle 407 and the ellipsoid 402; the gap between the right edge of the semi-circular arc surface and the junction of the right fixed handle 407 and the ellipsoid 402 extends to the right to communicate with the outside air, forming a tow inlet, and the height of the tow inlet in the vertical direction is 4 mm; the lower curved surface arches upward in the front-rear direction and arches downward in the left-right direction; the maximum height of the tow channel 5 in the vertical direction is 12 mm, and the minimum height is 10 mm; the length of the tow channel 5 in the front-rear direction is 60 mm;

[0077] As Figures 9 - 10 shown, left and right grooves are provided at the junction of the tow channel 5 and the first compressed air channel 301; the shape of the left groove is the same as that of the left fixed handle 401, and the left fixed handle 401 is embedded in the left groove, and the height of the gap between the two in the vertical direction is 0.1 mm; the shape of the right groove is the same as the overall structure formed by the right fixed handle 407 and the right positioning handle 406, and the overall structure formed by the right fixed handle 407 and the right positioning handle 406 is embedded in the right groove, and the height of the gap between the two in the vertical direction is 0.1 mm. The surfaces of the left and right grooves are smooth, and the surface roughness Ra value is 1.0 μm, so that the jet rotation device 4 is installed at the junction of the tow channel 5 and the first compressed air channel 301;

[0078] As Figures 8 - 9 shown, the installation method of the jet rotation device 4 satisfies that the tow passes through the hanging channel 201 and enters the tow channel 5. When the tow passes through the tow channel 5, it contacts the jet rotation device 4 and drives the jet rotation device 4 to rotate around the central axis parallel to the left-right direction.

[0079] Example A3

[0080] A texturing device for multifilament industrial yarns, as Figure 2 shown, is divided into an upper cover layer 1, an intermediate layer 2, and a main body layer 3 arranged in sequence from top to bottom;

[0081] As shown Figures 2 - 3 in the figure, the inside of the texturing device for ply industrial yarn is provided with a tow channel 5, a first compressed air channel 301, a second compressed air channel and a jet rotating device 4; the tow channel 5 is arranged in the middle layer 2, the first compressed air channel 301 is arranged in the main body layer 3, and the second compressed air channel is arranged in the upper cover layer 1 and the middle layer 2; the extending direction of the tow channel 5 is parallel to the front-rear direction, the first compressed air channel 301 is located below the tow channel 5, and the second compressed air channel is located above the tow channel 5 and behind the first compressed air channel 301 at the same time; the first compressed air channel 301 and the second compressed air channel are arranged at an interval of 25 mm in the front-rear direction; the extending direction of the first compressed air channel 301 is parallel to the up-down direction, and the first compressed air channel 301 is of a cylindrical structure with a diameter of 4 mm;

[0082] As shown Figures 4 - 8 in the figure, the second compressed air channel is composed of an air inlet channel 101, a pressure stabilizing chamber 102 and a jet channel 103 which are arranged in sequence from top to bottom and communicated with each other; the extending directions of the air inlet channel 101 and the jet channel 103 are both parallel to the up-down direction; the air inlet channel 101 is of a cylindrical structure with a diameter of 5 mm; the pressure stabilizing chamber 102 is of a cube structure with a length of 8 mm in the left-right direction, a length of 5 mm in the front-rear direction and a height of 3 mm in the up-down direction; the jet channel 1.3 is of a cylindrical structure with a diameter of 2 mm and a length of 3 mm in the up-down direction; the number of the jet channels 103 is 3 and they are arranged in parallel in the left-right direction;

[0083] As shown Figures 9 - 10 in the figure, an air flow channel 408 is arranged in the jet rotating device 4, and the air flow channel 408 is the only channel between the tow channel 5 and the first compressed air channel 301; the jet rotating device 4 is composed of a left fixed handle 401, an ellipsoid 402, a right fixed handle 407 and a right positioning handle 406 which are arranged in sequence in the left-right direction. The long axis of the ellipsoid 402 is parallel to the left-right direction. An air flow channel 408 is arranged in the ellipsoid 402. The air flow channel 408 is in a Y shape, with an air flow outlet a 403 and an air flow outlet b 405 at the upper end and an air flow outlet c 404 at the lower end. The air flow outlet a 403 and the air flow outlet b 405 are arranged at an interval in the left-right direction; the center of the orthographic projection of the air flow outlet c 404 coincides with the center of the orthographic projection of the ellipsoid 402; the left fixed handle 401, the right fixed handle 407 and the right positioning handle 406 are all of a cylindrical structure and their central axes are parallel to the left-right direction; the jet rotating device 4 is a ceramic part with a smooth surface, and the surface roughness Ra value is 1.2 μm;

[0084] As shown Figure 10As shown, the major axis length L1 of the ellipsoid 402 is 10 mm, and the minor axis length of the ellipsoid 402 is 6 mm; the left fixing handle 401 and the right fixing handle 407 have the same diameter, and the value range is 2 mm, and the left fixing handle 401 and the right fixing handle 407 have the same length, and the value range is 8 mm; the diameter of the right positioning handle 406 is 1.5 mm, and the length L2 of the right positioning handle 406 is 2 mm; the air outlets a 403, air outlets b 405 and air outlet c 404 are circular, the diameters of the air outlets a 403 and air outlets b 405 are 3 mm, and the diameter of the air outlet c 404 is 5 mm;

[0085] As Figures 9 - 10 shown, the inner surface of the tow channel 5 is jointly composed of an upper curved surface and a lower curved surface; the upper curved surface is a semi-circular arc surface; the left edge of the semi-circular arc surface is directly above the junction of the left fixing handle 401 and the ellipsoid 402, and the right edge of the semi-circular arc surface is directly above the junction of the right fixing handle 407 and the ellipsoid 402; the gap between the right edge of the semi-circular arc surface and the junction of the right fixing handle 407 and the ellipsoid 402 extends to the right to communicate with the outside air, forming a tow inlet, and the height of the tow inlet in the up-down direction is 2 mm; the lower curved surface arches upward in the front-back direction and arches downward in the left-right direction; the maximum height of the tow channel 5 in the up-down direction is 8 mm, and the minimum height is 6 mm; the length of the tow channel 5 in the front-back direction is 40 mm;

[0086] As Figures 9 - 10 shown, left and right grooves are provided at the junction of the tow channel 5 and the first compressed air channel 301; the shape of the left groove is the same as that of the left fixing handle 401, and the left fixing handle 401 is embedded in the left groove, and the height of the gap between the two in the up-down direction is 0.05 mm; the shape of the right groove is the same as the whole formed by the right fixing handle 407 and the right positioning handle 406, and the whole formed by the right fixing handle 407 and the right positioning handle 406 is embedded in the right groove, and the height of the gap between the two in the up-down direction is 0.05 mm. The surfaces of the left and right grooves are smooth, and the surface roughness Ra value is 0.8 μm, so that the jet rotation device 4 is installed at the junction of the tow channel 5 and the first compressed air channel 301;

[0087] As Figures 8 - 9 shown, the installation method of the jet rotation device 4 satisfies that the tow passes through the hanging channel 201 and enters the tow channel 5. When the tow passes through the tow channel 5, it contacts the jet rotation device 4 and drives the jet rotation device 4 to rotate around the central axis parallel to the left-right direction.

[0088] Example B1

[0089] A method for making network points on ply industrial yarns, as Figure 1As shown, a texturing device for ply industrial yarn is used. Ply industrial yarn with a specification of 50,000 D / 4,800 f (formed by plying 25 tested single yarns, with the specification of each single yarn being 2,000 D / 192 F) passes through the tow channel, and compressed air is continuously introduced into the first compressed air channel and the second compressed air channel. The texturing pressure of the first compressed air channel is 6 bar, and the texturing pressure of the second compressed air channel is 6 bar.

[0090] After the ply industrial yarn leaves the tow channel, it is first wound into shape and then tested. The winding speed is 600 m / min, the winding tension is 2,600 cN, the texturing degree of the measured ply industrial yarn is 12 per meter, and the strength retention rate is 96%.

[0091] Comparative Example 1

[0092] A texturing device for ply industrial yarn is basically the same as that in Example A1, except that: the second compressed air channel is not provided, and only the first compressed air channel is available.

[0093] A method for texturing ply industrial yarn is basically the same as that in Example B1, except that: a texturing device for industrial yarn of this comparative example is used.

[0094] After the ply industrial yarn leaves the tow channel, the texturing degree of the ply industrial yarn is 9 per meter, and the strength retention rate is 92%.

[0095] Compared with Example B1, in Comparative Example 1, the texturing degree of the ply industrial yarn after texturing is reduced by 25%, and the strength retention rate drops by 4%. This is because the texturing device for ply industrial yarn in Comparative Example 1 does not have a loosening zone (the second compressed air channel), and the tow cannot form a uniform single-filament winding structure in the texturing zone (the jet rotating device and the first compressed air channel), so the texturing degree decreases; the decrease in the texturing degree leads to poor cohesion of the tow, uneven force on the single filaments during the stretching process, and a decrease in the tow strength; before the tow in Example B1 enters the texturing zone, it can be fully loosened under the action of the loosening zone and form uniform and effective single-filament entanglement in the texturing zone. Therefore, the texturing degree and strength retention rate of Comparative Example 1 are worse than those of Example B1.

[0096] Comparative Example 2

[0097] A texturing device for ply industrial yarn is basically the same as that in Example A1, except that: the air flow channel is not Y-shaped, but a straight-through cylindrical shape, and its diameter is the same as the air flow outlet c.

[0098] A method for texturing ply industrial yarn is basically the same as that in Example B1, except that: a texturing device for industrial yarn of this comparative example is used.

[0099] After the multifilament industrial yarn leaves the yarn bundle channel, the number of networks of the multifilament industrial yarn is 8 per meter, and the strength retention rate is 93%.

[0100] Compared with Example B1, in Comparative Example 2, the number of networks of the multifilament industrial yarn after applying network points decreased by 33%, and the strength retention rate decreased by 3%. This is because the air flow channel of the air jet rotating device used in Comparative Example 2 is cylindrical. The jet air flow of the cylindrical air flow channel can fully vibrate the yarn bundle. However, due to the large number of single filaments in the yarn bundle, the entanglement structure of the single filaments is insufficient, which affects the number of networks and the strength retention rate. In Example B1, a Y-shaped air flow channel is used. Under the alternating action of the single hole and the double hole, the single filaments in the yarn bundle can effectively form position replacement and more effectively form single filament entanglement. Therefore, the number of networks and the strength retention rate of Comparative Example 2 are worse than those of Example B1.

[0101] Example B2

[0102] A method for applying network points to multifilament industrial yarns, as Figure 1 shown, using a yarn networker of Example A2, passing a multifilament industrial yarn with a specification of 100000D / 9600f (formed by twisting 50 tested single yarns, and the specification of each single yarn is 2000D / 192F respectively) through the yarn bundle channel, and continuously introducing compressed air into the first compressed air channel and the second compressed air channel. The network pressure of the first compressed air channel is 8 bar, and the network pressure of the second compressed air channel is 8 bar.

[0103] After the multifilament industrial yarn leaves the yarn bundle channel, it is first wound into a shape and then tested. The winding speed is 400 m / min, the winding tension is 5000 cN, and the measured number of networks of the multifilament industrial yarn is 10 per meter, and the strength retention rate is 95%.

[0104] Example B3

[0105] A method for applying network points to multifilament industrial yarns, as Figure 1 shown, using a yarn networker of Example A3, passing a multifilament industrial yarn with a specification of 8000D / 768f (formed by twisting 4 tested single yarns, and the specification of each single yarn is 2000D / 192F respectively) through the yarn bundle channel, and continuously introducing compressed air into the first compressed air channel and the second compressed air channel. The network pressure of the first compressed air channel is 4 bar, and the network pressure of the second compressed air channel is 4 bar.

[0106] After the multifilament industrial yarn leaves the yarn bundle channel, it is first wound into a shape and then tested. The winding speed is 1000 m / min, the winding tension is 500 cN, and the measured number of networks of the multifilament industrial yarn is 15 per meter, and the strength retention rate is 98%.

Claims

1. A network device for twisting industrial yarns, wherein a yarn bundle channel (5) and a first compressed air channel (301) are provided inside, wherein the extension direction of the yarn bundle channel (5) is parallel to the front-back direction, and the first compressed air channel (301) is located below the yarn bundle channel (5), characterized in that: An air jet rotating device (4) and a second compressed air channel are also provided inside; The jet rotating device (4) is installed at the junction of the tow channel (5) and the first compressed air channel (301); An air flow channel (408) is provided in the jet rotating device (4), and the air flow channel (408) is the only channel between the filament bundle channel (5) and the first compressed air channel (301); The jet rotating device (4) is installed in such a manner that: when the tow passes through the tow channel (5), it contacts the jet rotating device (4) and drives the jet rotating device (4) to rotate around a central axis parallel to the left-right direction; The jet rotating device (4) comprises a left fixed handle (401), an elliptical ball (402), a right fixed handle (407), and a right positioning handle (406) which are arranged in sequence along the left-right direction; the long axis of the elliptical ball (402) is parallel to the left-right direction; and the air flow channel (408) is located inside the elliptical ball (402); the air flow channel (408) is Y-shaped, with an air flow outlet a (403) and an air flow outlet b (405) at the upper end and an air flow outlet c (404) at the lower end; and the air flow outlet a (403) and the air flow outlet b (405) are arranged at intervals along the left-right direction; The inner surface of the tow channel (5) is composed of an upper curved surface and a lower curved surface; the upper curved surface is a semicircular arc surface; The left edge of the semicircular arc surface is located directly above the junction of the left fixed handle (401) and the ellipsoidal sphere (402), and the right edge of the semicircular arc surface is located directly above the junction of the right fixed handle (407) and the ellipsoidal sphere (402); The second compressed air channel is located above the tow channel (5) and behind the first compressed air channel (301). The first compressed air channel (301) and the second compressed air channel are arranged at intervals in the front-to-back direction.

2. A network device for twisting industrial yarn according to claim 1, characterized in that: The airflow outlet a (403), the airflow outlet b (405) and the airflow outlet c (404) are circular, the diameters of the airflow outlet a (403) and the airflow outlet b (405) are 3-4 mm, and the diameter of the airflow outlet c (404) is 5-6 mm; the center of the orthographic projection of the airflow outlet c (404) coincides with the center of the orthographic projection of the ellipsoid (402).

3. A network device for twisting industrial yarn according to claim 2, characterized in that: The length of the major axis of the ellipsoid (402) is 10-15 mm, and the length of the minor axis of the ellipsoid (402) is 6-8 mm; The left fixing handle (401), the right fixing handle (407), and the right positioning handle (406) are all cylindrical structures, and the central axis is parallel to the left and right directions; The diameters of the left fixing handle (401) and the right fixing handle (407) are the same and are in the range of 2-3 mm, and the lengths of the left fixing handle (401) and the right fixing handle (407) are the same and are in the range of 8-10 mm; The diameter of the right positioning handle (406) is 1.5-2 mm, and the length of the right positioning handle (406) is 2-3 mm; The jet rotating device (4) is a ceramic part with a smooth surface, and the surface roughness Ra value is 1.2-2.0 μm.

4. A network device for twisting industrial yarn according to claim 3, characterized in that: A left groove and a right groove are provided at the junction of the tow channel (5) and the first compressed air channel (301) inside the network device for twisting industrial yarns; The shape of the left groove is the same as that of the left fixing handle (401), and the left fixing handle (401) 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 fixing handle (407) and the right positioning handle (406), and the whole formed by the right fixing handle (407) and the right positioning handle (406) 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.

5. The network device for twisting industrial yarn according to claim 1, characterized in that: The lower curved surface is arched upward in the front-to-back direction and arched downward in the left-to-right direction; the maximum height of the tow channel (5) in the up-down direction is 8-12 mm, and the minimum height is 6-10 mm; the length of the tow channel (5) in the front-to-back direction is 40-60 mm.

6. The network device for twisting industrial yarn according to claim 1, characterized in that: The spacing between the first compressed air channel (301) and the second compressed air channel along the front-to-back direction is 25-30 mm.

7. The network device for plying industrial yarn according to claim 1, characterized in that: The extension direction of the first compressed air channel (301) is parallel to the up-down direction, and the first compressed air channel (301) is a cylindrical structure with a diameter of 4-6 mm; The second compressed air channel is composed of an air intake channel (101), a pressure stabilization chamber (102), and an injection channel (103) which are arranged in sequence from top to bottom and are connected; The extending directions of the air inlet channel (101) and the injection channel (103) are both parallel to the up-down direction; The air inlet channel (101) is a cylindrical structure with a diameter of 5-6 mm; the pressure stabilizing chamber (102) is a cubic structure with a length of 8-10 mm in the left-right direction, a length of 5-6 mm in the front-back direction, and a height of 3-4 mm in the up-down direction; the injection channel (103) is a cylindrical structure with a diameter of 2-3 mm and a length of 3-4 mm in the up-down direction; The number of injection channels (103) is three and they are arranged in parallel in the left-right direction.

8. The network device for twisting industrial yarn according to claim 1, characterized in that: The network device for twisted industrial yarns comprises an upper cover layer (1), an intermediate layer (2), and a main body layer (3) which are arranged in sequence from top to bottom; a yarn bundle channel (5) is arranged in the intermediate layer (2); a first compressed air channel (301) is arranged in the main body layer (3); and a second compressed air channel is arranged in the upper cover layer (1) and the intermediate layer (2).

9. A method for making interlaced dots of twisted industrial yarn, characterized in that: A network device for twisted industrial yarn as described in any one of claims 1 to 8 is used to pass the twisted industrial yarn through the yarn bundle channel (5), and compressed air is continuously introduced into the first compressed air channel (301) and the second compressed air channel.

10. A method for making interlaced dots of twisted industrial yarn according to claim 9, characterized in that: The specification of the twisted industrial yarn is 8000D / 768f-100000D / 9600f, the winding speed is 400-1000m / min, the winding tension is 500-5000cN, the network pressure of the first compressed air channel (301) is 4-8bar, the network pressure of the second compressed air channel is 4-8bar, and after the tow leaves the tow channel (5), the network density is 10-15 pieces / meter, and the strength retention rate is 95%-98%.

Images