Array spinning suspension conveying device and array spinning production line

Abstract

The application relates to a suspension conveying device of array spinning and an array spinning production line. The suspension conveying device comprises a conveying box body with an inner cavity, a fiber sliver passes through the left and right central positions of the inner cavity, outer circulation housings are symmetrically fixed on the two sides of the outer surface of the conveying box body, an outer circulation channel is formed between the outer circulation housings and the conveying box body, a circulating fan is arranged in the middle of the outer circulation channel, a plurality of air supply channels are arranged on the lower sides of the conveying box body, the lower part of the outer circulation channel is connected with the inner cavity, a plurality of air suction channels are arranged on the upper sides of the conveying box body, the upper part of the outer circulation channel is connected with the inner cavity, the air supply channels and the air suction channels are annularly distributed along the fiber sliver, and are used for forming air vortexes pointing to the fiber sliver, and an electrostatic ionization nozzle is arranged between the bottom of the inner cavity and the air supply channels on the two sides. The application has the advantages of simple structure, low cost, sufficient exposure of the fiber sliver to the nano array atmosphere through the suspension conveying, and high-efficiency array yarn forming.

Description

Technical Field

[0001] This invention belongs to the field of textile processing machinery technology, and in particular relates to a suspension conveying device and an array spinning production line for array spinning. Background Technology

[0002] Surface modification of fiber materials is an efficient means to improve the functionality of textiles and the performance of yarns. Electrospinning and electroionization technologies can be used to combine submicron-scale functional fiber segments and functional lattices with traditional fibers, thereby improving the wearability and functionality of traditional fiber products.

[0003] To achieve efficient composite of functional fiber fragments and functional lattices with traditional fibers, the current mainstream technical solution involves adding electrostatic ionization / electrospinning equipment during the stretching stage after fiber carding. Chinese Patent (Authorization Announcement No.: CN107904732B) discloses a device and method for preparing electrospun submicron fiber sliver composite blended yarn. In this method, a needleless electrospinning device is positioned directly below the stretched cotton web. The stretched cotton web is then conveyed forward through a negative pressure suction screen and passes through the electrospinning box. However, due to airflow instability during the fiber web stretching process, the web may break, wrinkle, or bulge, worsening the unevenness of the collected fiber sliver weight and affecting the quality of subsequent yarns. Furthermore, electrospinning equipment can also be added during the ring spinning stage, but this method is not suitable for short-process spinning technology and other novel spinning technologies. Therefore, optimizing the fiber assembly conveying method and improving the unevenness during the stretching process is beneficial for improving the performance of functional yarns.

[0004] If fiber sliver is chosen as the composite material, multiple pairs of rollers / rollers are often required for auxiliary support and conveying. This limits the effective area for the sliver to receive nanoarray embedding, and the nanoarray is prone to being mistakenly deposited on the rollers and causing adhesion. If the sliver is suspended and conveyed forward, it can be fully exposed to the nanoarray atmosphere, achieving efficient array yarn formation and providing a new way for efficient and low-cost functional modification and quality improvement of textiles. Summary of the Invention

[0005] The main objective of this invention is to provide a suspension conveying device and an array spinning production line for array spinning, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A suspended conveying device for array spinning includes a conveying box with an inner cavity through which fiber slivers pass centrally from left to right. External circulation housings are symmetrically fixed to both sides of the outer surface of the conveying box, forming an external circulation channel between the external circulation housings and the conveying box. A circulating fan is disposed in the middle of the external circulation channel. Several air supply channels are located on both sides of the lower part of the conveying box, connecting the lower part of the external circulation channel to the inner cavity. Several air suction channels are located on both sides of the upper part of the conveying box, connecting the upper part of the external circulation channel to the inner cavity. The air supply and suction channels are arranged in a ring along the fiber sliver to form an air vortex pointing towards the fiber sliver. An electrostatic ionization nozzle is disposed at the bottom of the inner cavity between the air supply channels on both sides to generate a jet to form a nanoarray.

[0008] Preferably, the conveyor box is rectangular, the outer circulation shell is a U-shaped structure that fits into the conveyor box, and the cross-section of the inner cavity is circular.

[0009] Preferably, the two symmetrical outer circulation shells have one or more pairs arranged in an array along the length of the conveying box.

[0010] Preferably, the inner walls of the external circulation channel, inner cavity, air supply channel, and air intake channel are all provided with an anti-adhesion layer and an anemometer, and the anti-adhesion layer is made of polytetrafluoroethylene.

[0011] An array spinning production line includes the aforementioned suspended conveyor device.

[0012] Preferably, the array spinning production line includes a licker-in roller, cylinder, doffer, cotton web bundling opening, front conveyor roller, suspension conveyor, rear conveyor roller, and sliver bundling opening arranged sequentially along the production path. The front conveyor roller and the rear conveyor roller have the same linear speed, achieving zero drafting during the conveying process.

[0013] Preferably, the linear velocity of the front transfer roller is 90-150% of the Dolph transfer speed.

[0014] The present invention provides a suspension conveying device for array spinning, which has the following beneficial effects.

[0015] In this invention, several air supply channels and air suction channels are arranged in a ring along the fiber sliver. Under the action of the circulating fan, an air vortex pointing towards the fiber sliver can be formed to support the fiber sliver. It is not necessary to set up multiple pairs of rollers / rollers to assist in the support and conveying. Only one pair of rollers / rollers is needed at the front and rear of the conveying box to suspend and convey the fiber sliver forward. During the suspension and conveying process, the electrostatic ionization nozzle generates a jet to form a nano-array. The nano-array is deposited on the fiber sliver under the drive of the air vortex and deeply integrated with the fiber sliver. This invention has a simple structure and low cost. The fiber sliver is fully exposed in the nano-array atmosphere through suspension and conveying, which can achieve efficient array yarn formation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the levitation conveying device of the present invention.

[0017] Figure 2 This is a schematic diagram of the array spinning production line of the present invention.

[0018] In the diagram: 1. Conveyor box; 2. Inner cavity; 3. Fiber sliver; 4. External circulation shell; 5. External circulation channel; 6. Circulating fan; 7. Air supply channel; 8. Air suction channel; 9. Electrostatic ionization nozzle; 10. Zipper roller; 11. Cylinder; 12. Doffer; 13. Cotton web bundling port; 14. Front conveyor roller; 15. Rear conveyor roller; 16. Sliver bundling port; 17. Composite fiber sliver. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Reference Figure 1-2 This invention provides a suspended conveying device for array spinning, comprising a conveying box 1, the conveying box 1 having an inner cavity 2, through which fiber sliver 3 passes at a central position on the left and right sides of the inner cavity 2, and an outer circulation shell 4 symmetrically fixed on both sides of the outer surface of the conveying box 1, forming an outer circulation channel 5 between the outer circulation shell 4 and the conveying box 1, with a circulating fan 6 disposed in the middle of the outer circulation channel 5, and several air supply channels 7 on both sides of the lower part of the conveying box 1, connecting the lower part of the outer circulation channel 5 to the inner cavity 2, and several air suction channels 8 on both sides of the upper part of the conveying box 1, connecting the upper part of the outer circulation channel 5 to the inner cavity 2, the several air supply channels 7 and air suction channels 8 being arranged in a ring along the fiber sliver 3 to form an air vortex pointing towards the fiber sliver 3, and an electrostatic ionization nozzle 9 disposed at the bottom of the inner cavity 2 between the two air supply channels 7 to generate a jet to form a nanoarray.

[0023] It should be noted that the electrostatic ionization nozzle 9 needs to be connected to an electrostatic ionization device. The electrostatic ionization nozzle 9 excites the polymer solution to generate a jet to form a nanoarray. This is well known to those skilled in the art and is not the focus of this invention, so it will not be elaborated here.

[0024] In this invention, several air supply channels 7 and air suction channels 8 are arranged in a ring along the fiber sliver 3. Under the action of the circulating fan 6, an air vortex pointing towards the fiber sliver 3 can be formed to support the fiber sliver 3. It is not necessary to set up multiple pairs of rollers / rollers to assist in the support and conveying. Only one pair of rollers / rollers is set at the front and back of the conveying box 1 to suspend and convey the fiber sliver 3 forward. During the suspension and conveying process, the electrostatic ionization nozzle 9 generates a jet to form a nano-array. The nano-array is deposited on the fiber sliver 3 under the drive of the air vortex and deeply integrated with the fiber sliver 3. This invention has a simple structure and low cost. The fiber sliver 3 is fully exposed in the nano-array atmosphere through suspension and conveying, which can achieve efficient array yarn formation.

[0025] In a preferred embodiment, the conveyor box 1 is rectangular, the outer circulation shell 4 is a U-shaped structure that fits into the conveyor box 1, and the cross-section of the inner cavity 2 is circular.

[0026] As a preferred embodiment, the two symmetrical outer circulation housings 4 have one or more pairs arranged in an array along the length of the conveyor box 1.

[0027] In this embodiment, there are seven pairs of symmetrical outer circulation shells 4.

[0028] As a preferred embodiment, the inner walls of the external circulation channel 5, the inner cavity 2, the air supply channel 7, and the air intake channel 8 are all provided with an anti-adhesion layer and an anemometer, and the anti-adhesion layer is made of polytetrafluoroethylene.

[0029] The present invention also provides an array spinning production line, including the above-mentioned suspension conveyor device.

[0030] As a preferred embodiment, the array spinning production line includes a licker-in roller 10, a cylinder 11, a doffer 12, a cotton web bundling opening 13, a front conveyor roller 14, a suspension conveyor, a rear conveyor roller 15, and a sliver bundling opening 16 arranged sequentially along the production path. The front conveyor roller 14 and the rear conveyor roller 15 have the same linear speed, achieving zero drafting during the conveying process.

[0031] As a preferred embodiment, the linear velocity of the front conveyor roller 14 is 90-150% of the conveyor velocity of the doffer 12.

[0032] In use, the licker-in roller 10, cylinder 11, and doffer 12 are the core components of the carding machine (such as a carding machine). The three work together to open, card, remove impurities, and aggregate the fibers into a web, ultimately forming a cotton web. The cotton web is then bundled through the cotton web bundling port 13 to form a fiber sliver 3. Before entering the conveying box 1, the fiber sliver 3 is held by the front conveying roller 14, and after leaving the conveying box 1, it is held by the rear conveying roller 15. The fiber sliver 3 is deeply integrated with the nano-array in the conveying box 1, and finally bundled through the cotton sliver bundling port 16 to form a composite fiber sliver 17 reinforced with the nano-array.

[0033] This invention also provides a method for preparing cotton / PAN array spun yarn, using the above-mentioned production line, including the following steps:

[0034] S1: Preparations

[0035] (1) Preparation of polymer solution: Weigh 60g of polyacrylonitrile and dissolve it in 940g of DMF to obtain a solution with a mass fraction of 6%, and stir at room temperature for 24h until the solution is clear and transparent;

[0036] (2) Set the target ionization environment: temperature 25±1℃, humidity 40±5%;

[0037] (3) Preparation of raw materials for array spinning: 100% long-staple cotton rolls, with consistent front / back conveyor roller speeds of 30m / min;

[0038] (4) Electrostatic ionization parameters: high voltage power supply voltage 45kV, vertical distance from fiber sliver to electrostatic ionization nozzle is 25cm;

[0039] S2: Formal Preparation

[0040] (1) Install the suspension transmission device behind the doffer of the carding machine, adjust the linear speed of the front conveyor roller to 120% of the linear speed of the doffer, start the circulating fan (air volume 200m³ / h), form a symmetrical vortex field (wind speed 8m / s) in the conveyor box, and confirm that the fiber sliver is suspended under the support of the vortex and passes through the conveyor box.

[0041] (2) Turn on the electrostatic ionization nozzle (voltage 40kV, flow rate 0.3mL / min). The PAN solution forms a nano array under high pressure. The nanoparticles combine with the fiber strip at multiple angles under the drive of the vortex. The undeposited particles return to the circulation system through the suction channel with the airflow.

[0042] (3) Collect the obtained composite fiber strips, set the drawing process to 4 drawing and 4 passes, the roving weight is 4g / 10m, the twist is 5T / m, and the machine speed is 200rpm; the fineness of the yarn is 20 count, the twist is 700T / m, and the machine speed is 12000rpm.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A suspension conveyor for array spinning, characterized by, The device comprises a conveying box with an inner cavity through which a fiber tow is centrally passed from left to right, and symmetrical outer circulation shells fixed on both sides of the outer surface of the conveying box, forming an outer circulation channel between the outer circulation shells and the conveying box, with a circulation fan in the middle of the outer circulation channel, a plurality of air supply channels in the lower part of the conveying box on both sides to connect the lower part of the outer circulation channel with the inner cavity, a plurality of air suction channels in the upper part of the conveying box on both sides to connect the upper part of the outer circulation channel with the inner cavity, the plurality of air supply channels and air suction channels being annularly distributed along the fiber tow to form air vortexes directed to the fiber tow, and an electrostatic ionization nozzle arranged between the air supply channels on both sides at the bottom of the inner cavity to generate jet flow to form a nano array. The plurality of air supply channels and air suction channels are annularly distributed along the fiber tow, and under the action of the circulation fan, air vortexes directed to the fiber tow can be formed to support the fiber tow, so that the fiber tow can be suspended and conveyed forward by only arranging a pair of skin rollers / rollers in front of and behind the conveying box, and in the process of suspended conveying, the electrostatic ionization nozzle generates jet flow to form a nano array, which is deposited on the fiber tow under the driving of the air vortexes and deeply combines with the fiber tow. The conveying box is rectangular, the outer circulation shells are U-shaped structures that fit the conveying box, and the cross section of the inner cavity is circular. The symmetrical outer circulation shells have a plurality of pairs that are arrayed along the length direction of the conveying box.

2. A floating conveyor for array spinning according to claim 1, wherein The inner walls of the outer circulation channel, the inner cavity, the air supply channels and the air suction channels are each provided with an anti-adhesion layer made of polytetrafluoroethylene and an anemometer.

3. An array spinning production line characterized by, The device comprises the suspended conveying device of any one of claims 1-2.

4. An array spinning line according to claim 3, characterized in that, The array spinning production line comprises, in sequence along a production path, a licker-in, a taker-in, a doffer, a web bunching port, a front conveying roller, the suspended conveying device, a rear conveying roller and a sliver bunching port, the linear speed of the front conveying roller and the rear conveying roller being consistent to realize zero draft in the conveying process.

5. An array spinning line according to claim 4, characterized in that, The linear speed of the front conveying roller is 90-150% of the conveying speed of the doffer. The linear speed of the front conveying roller is 90-150% of the conveying speed of the doffer.

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