A spiral guide device for air-jet vortex spinning with double channels

Abstract

This invention discloses a dual-channel fiber spiral guiding device for air-jet vortex spinning, comprising a spiral guiding block and a guiding needle seat. The spiral guiding block has spiral guiding grooves on both sides with opposite spiral directions from top to bottom, separated by a centrally protruding partition. The spiral guiding grooves on both sides of the spiral guiding block and the conical groove inside the guiding needle seat form a double spiral guiding channel. The partition ensures that the two double spiral guiding channels are independent of each other. This invention sets different helical angles at the bottom of the two spiral guiding grooves, i.e., different groove depths. The fiber sliver in the deeper spiral guiding groove is closer to the axis, resulting in more of it being located in the yarn core after yarn formation. The fiber sliver in the other spiral guiding groove is relatively farther from the axis, resulting in more of it being located in the yarn sheath after yarn formation. By feeding different types or colors of fiber slivers into the double spiral guiding channels, air-jet vortex spun yarns with differentiated sheath-core structures can be obtained in a shorter process, enriching yarn styles and improving the flexibility of developing differentiated structure yarns.

Description

Technical Field

[0001] This invention relates to the field of textile technology, specifically to a dual-channel fiber spiral guiding device for jet vortex spinning. Background Technology

[0002] Air-jet vortex spinning is a novel spinning method in which fibers are twisted into yarn by airflow, resulting in high speed and high output. The spinning process involves compressed air being tangentially injected into the airflow twisting chamber through nozzles along the inner wall of the nozzle, forming a three-dimensional high-speed rotating strong negative pressure vortex field. The airflow velocity within the twisting chamber exhibits a U-shaped distribution pattern, with the central axis lower and the periphery higher. Fiber slivers, after the drafting process, are drawn into the twisting chamber by a fiber guide device under negative pressure and twisted into yarn. Fibers located at the central axis directly enter the hollow spindle to form core fibers, which are distributed in a parallel, straight state within the inner layer of the yarn. The fiber tips located at the periphery enter the hollow spindle along with the fibers at the central axis, forming core fibers. After detaching from the front roller, the fiber tails become free ends, driven by the high-speed rotating airflow to evenly wrap around the core fibers, forming the outer layer of the yarn.

[0003] Currently, in the preparation of blended yarn using air-jet vortex spinning, fiber color mixing occurs in the pre-spinning process, primarily through two methods: fiber blending and sliver blending. Fiber blending involves mixing fiber raw materials of different colors during the cleaning and carding process. Sliver blending involves mixing multiple colored slivers through multiple drawing passes. While pre-spinning fiber blending provides better uniformity in color mixing than sliver blending, it is less suitable for natural and synthetic fibers like polyester-cotton blends. Furthermore, the colored fibers in the yarn tend to exhibit uniform color mixing, resulting in poor flexibility in controlling the differentiated structural color. It is difficult to regulate the internal and external fiber distribution and differentiated colors within the yarn cross-section based on fiber properties and color combinations.

[0004] Existing air-jet vortex spinning machines have a single spiral guide channel on only one side of the fiber guiding device. The drafted fiber bundles must be continuously fed into the nozzle through this channel to be wound into yarn. Using a single-channel guide device makes it difficult to control the mixing of fibers with different structures and colors. If two fiber bundles of different colors or types are drawn into the same guide channel under negative pressure, the fibers immediately begin to mix, and this process is random, limiting the preparation of differentiated yarn structures during air-jet vortex spinning.

[0005] This case arose in order to resolve the aforementioned issues. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a dual-channel fiber spiral guiding device for jet vortex spinning, which solves the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a fiber spiral guiding device with dual channels for jet vortex spinning, comprising a guiding block for a fiber guiding needle seat, wherein a first spiral guiding groove and a second spiral guiding groove with opposite directions of rotation are respectively opened on both sides of the guiding block, the first spiral guiding groove and the second spiral guiding groove are both opened from the top to the bottom, and the spiral helix angles of the two are set differently, the first spiral guiding groove and the second spiral guiding groove on both sides of the guiding block together with the conical groove of the fiber guiding needle seat form a double spiral guiding channel.

[0008] Furthermore, the middle portion of the guide block (i.e., the spiral guide block) protrudes to form a partition. The spiral guide grooves on both sides of the spiral guide block and the conical groove of the fiber guide needle seat form a double spiral guide channel, wherein the partition protruding in the middle of the spiral guide block separates the two channels.

[0009] By designing a double-helix guide channel, different helix angles are set at the bottom of the two helix guide grooves, resulting in different depths of the helix guide grooves. The larger the helix angle at the bottom of the helix guide groove, the deeper the guide groove. Fiber slivers located in the deeper helix guide groove enter the yarn tail closer to the axis. The shorter the fiber transport channel of the helix guide groove, the longer the fiber is transported under the control of the front roller. After the fiber tail ends are released from the control of the front roller, they fall onto the outer surface of the hollow spindle inlet relatively late, forming a shorter free tail fiber, which is more conducive to being located in the yarn core position. Fiber slivers in the other, shallower helix guide groove enter the yarn tail relatively far from the axis. The longer the fiber transport channel of the helix guide groove, the earlier the fiber tail ends are released from the control of the front roller, forming a fallen free tail fiber. This is conducive to wrapping the free end fibers that fall onto the outer surface of the hollow spindle inlet later, and the longer the free tail fiber is formed, the more obvious the yarn core-sheath structure characteristics become.

[0010] During production, if it is desired that one type of fiber be more distributed on the outer layer, it can be fed into a spiral guide groove far from the axis, ultimately achieving a difference in the radial distribution of the two fibers. Secondly, the difference in the radial distribution of the fibers can be controlled by adjusting the difference in the spiral helix angle at the bottom of the two spiral guide grooves. The greater the difference in the spiral helix angle at the bottom of the two spiral guide grooves, the greater the difference in the radial distribution of the spun yarn fibers.

[0011] Secondly, the dual-channel design allows for the control of yarn blending ratios using strips of different weights or colors (e.g., 10g / 5m of natural-colored stripe and 12g / 5m of blue stripe). Therefore, this invention enables flexible adjustment of the proportions of different yarns, bringing greater advantages in application.

[0012] As a preferred embodiment, the head size of the spiral guide block is further radially enlarged, its main cone angle is increased, and the bottom size remains unchanged.

[0013] As a preferred embodiment, the fiber guide needle seat is further provided with a conical groove inside. The radial dimension of the opening of the conical groove of the fiber guide needle seat is adapted to expand, and its cone angle is increased. The fiber guiding device can be completely placed inside the fiber guide needle seat. The conical groove, the spiral guide grooves on both sides of the spiral guide block, and the middle protruding partition form a dual channel for fiber feeding.

[0014] As a preferred embodiment, the bottom dimensions of the fiber guide needle seat remain unchanged.

[0015] A method of using a dual-channel fiber spiral guiding device for jet vortex spinning includes the following steps: Step 1: The two bundles of slivers after being drawn are fed into the dual channels by negative pressure adsorption. Different linear densities, fiber types or colors of slivers are selected according to process requirements. Step 2: The two bundles of shavings are fed into the dual channels in parallel with the inlet positions of the spiral guide grooves on both sides of the guide block, while ensuring the independence of the two bundles of shavings; Step 3: The bottom surface of the dual-channel is flush with the sliver gripping point of the front roller to ensure that the fibers enter the channel smoothly.

[0016] By adopting the above technical solution, the fiber guiding device with dual channels provided by the present invention has the following advantages compared with the prior art: By designing a double-helix guide channel, when the helix angles of the two helix guide grooves are set differently, that is, the depths of the helix guide grooves are different, the fiber strands located in the deeper helix guide groove are closer to the axis, and after yarn formation, more fibers are located in the yarn core, while the fiber strands in the other helix guide groove are relatively far from the axis, and after yarn formation, more fibers are located in the yarn skin.

[0017] Different raw material slivers can be fed into spiral guide grooves of varying depths according to the fabric's style characteristics. This distinguishes it from the uniform structure of air-jet vortex spun yarns obtained through loose fiber and sliver blending processes, resulting in yarns with different core-sheath structures. The yarn-making process is shorter, and the development of differentiated structural yarn products is more flexible. Selecting slivers of different types of raw materials and feeding them into spiral guide grooves of varying depths creates yarns with different core-sheath structures (e.g., polyester and cotton, where cotton fibers are distributed more on the outer side and polyester fibers more on the inner side, enhancing both the cotton feel and strength). Selecting slivers of different colors and feeding them into spiral guide grooves of varying depths allows for the control of fiber transfer differences between the inside and outside of the yarn through the structural differences of the dual-channel spiral guide grooves, thereby achieving air-jet vortex spun yarns with different color blending effects. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating its use in conjunction with the present invention; Figure 2 This is a disassembly diagram for use with this invention; Figure 3 This is a schematic diagram of the guide block with double helical guide grooves according to the present invention; Figure 4 This is a schematic diagram of the improved fiber guide needle seat of the present invention; Figure 5 This is a schematic diagram of the cross-section of the yarn to be spun according to the present invention; Figure 6 This is a schematic diagram of a conventional spiral guide block.

[0019] Figure 7 This is a schematic diagram of a standard fiber guide needle hub.

[0020] In the figure, 1 is the fiber guide needle seat; 2 is the conical groove; 3 is the guide block; 4 is the first spiral guide groove; 5 is the second spiral guide groove; and 6 is the partition. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] Conventionally, it generally includes a fiber guide needle seat 1 with its bottom placed at the nozzle inlet, and a guide block 3 (i.e., a spiral guide block) is placed inside it. A spiral guide groove is opened in the guide block 3. In this embodiment, the spiral guide block is improved, and the matching fiber guide needle seat 1 is adjusted accordingly.

[0023] See appendix Figure 1-3 A dual-channel fiber spiral guiding device for jet vortex spinning includes a guide block 3 with a radially expanded upper portion. A first spiral guide groove 4 and a second spiral guide groove 5 with opposite spiral directions are respectively opened on both sides of the guide block 3. Both spiral guide grooves are opened from top to bottom, and the spiral helix angles of the two spiral guide grooves are set differently, resulting in a difference in depth between the first spiral guide groove 4 and the second spiral guide groove 5. The fiber strands located in the deeper spiral guide groove are closer to the axis, and after yarn formation, more fibers are located in the yarn core. The fiber strands in the other spiral guide groove are relatively farther from the axis, and after yarn formation, more fibers are located in the yarn sheath.

[0024] In addition, the middle part of the spiral guide block protrudes and extends to form a partition 6. The spiral guide grooves on both sides of the spiral guide block and the conical groove 2 of the fiber guide needle seat 1 form a double spiral guide channel, wherein the partition 6 protrudes in the middle of the spiral guide block to separate the channels on both sides.

[0025] The addition of baffle 6 can separate the slivers and avoid mutual interference between the two slivers when they are first fed into the spiral guide channels on both sides.

[0026] The spiral guide block is made of ceramic material.

[0027] Because a spiral guide groove is added to the other side of the guide block 3, the guide block 3 needs to be enlarged in size, especially the head. Correspondingly, the size of the fiber guide needle seat 1 that houses the spiral guide block also needs to be improved accordingly.

[0028] As attached Figure 1 , 4 As shown, the upper part of the tapered groove 2 inside the fiber guide needle seat 1 is adapted and expanded to fit and embed the spiral guide block.

[0029] Since the bottom of the fiber guide needle holder 1 also needs to be adapted to the nozzle, the bottom size of the fiber guide needle holder 1 remains unchanged (the opening of the internal conical groove 2 is enlarged, and the bottom size is made consistent with the bottom size of the conventional guide needle holder by increasing the taper), so that the supporting equipment does not need to be changed as a whole.

[0030] The dual-channel spiral guide groove structure allows for the adjustment of the inner and outer distribution differences of fibers. Different colored slivers are fed and mixed through the dual-channel guide device, enabling the spinning of blended yarns with adjustable color depth. When slivers of different raw materials are fed in, such as polyester and cotton, the cotton fibers can be distributed more on the outer side, while the polyester fibers are distributed more on the inner side, improving both the cotton-like feel and strength.

[0031] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fiber spiral guiding device with dual channels for jet vortex spinning, characterized in that: The device includes a fiber guide needle holder and a guide block for the fiber guide needle holder. The guide block has a first spiral guide groove and a second spiral guide groove with opposite directions of rotation on both sides. The first spiral guide groove and the second spiral guide groove are both opened from top to bottom, and the bottom spiral angles of the two are different. The fiber guide needle holder has a conical groove. The first spiral guide groove and the second spiral guide groove on both sides of the guide block and the conical groove of the fiber guide needle holder form a double spiral guide channel.

2. The fiber spiral guiding device with dual channels for jet vortex spinning according to claim 1, characterized in that: The head size of the guide block is radially enlarged, its main cone angle is increased, and the bottom size remains unchanged.

3. The fiber spiral guiding device with dual channels for jet vortex spinning according to claim 1, characterized in that: The middle part of the guide block protrudes and extends to form a partition, which separates the double helical guide channels on both sides.

4. The fiber spiral guiding device with dual channels for jet vortex spinning according to claim 1, characterized in that: The external dimensions of the fiber guide needle seat remain unchanged, while the radial dimension of the internal tapered groove opening is adapted and expanded, and its cone angle is increased, so that the guide block can be completely placed inside the fiber guide needle seat.

5. The fiber spiral guiding device with dual channels for jet vortex spinning according to claim 4, characterized in that: The bottom dimensions of the fiber guide needle seat remain unchanged.

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