Core spinning device based on calculus principle and method and application thereof

Abstract

The application provides a winding core spinning device based on a calculus principle and a method and application thereof. The device is provided with a negative pressure air suction port on a special-shaped plate, and a corresponding negative pressure airflow guide assembly is arranged above the negative pressure air suction port. Under the mutual cooperation of the diffusion flow guide hole and the negative pressure air suction mechanism, the spread fiber type short fibers with a certain width and uniformly distributed fiber height parallelism are obtained on the grid ring. Meanwhile, the short fiber sliver, core yarn and winding core yarn form a "y" shape structure in the winding core wrapping area. The core yarn self-rotation drives the short fiber sliver to be tightly wrapped and wound to the outer layer of the core yarn in the winding core wrapping area to form the winding core yarn. Then, the winding core yarn passes through the soft reinforcing winding core part, so that the wrapping layer is tightly attached to the yarn body under the action of temperature and pressure to form a good wrapping effect. The winding core yarn has a compact yarn body and a large core yarn proportion, solves the problems of small wrapping tightness, many wrapping exposed cores and low core yarn proportion of the core-spun yarn on the ring spinning machine, and greatly improves the yarn quality.

Description

Technical Field

[0001] This invention relates to the field of textile processing technology, and in particular to a spinning device, method and application based on the principle of calculus. Background Technology

[0002] Core-spun yarn, also known as covered yarn, typically uses high-strength and elastic synthetic fiber filaments as the core, covered with short fibers such as cotton, wool, or viscose. This results in a yarn composed of two or more types of fibers, a novel type of yarn that combines the excellent properties of both filament core yarn and covered short fibers. It optimizes the yarn's structure and characteristics by maximizing strengths and minimizing weaknesses, making it highly popular. In short-fiber core-spun yarn, besides the degree of coverage of the core yarn by the short fibers affecting its performance, the volume ratio of the core yarn also significantly influences its properties.

[0003] Currently, there are various methods for spinning core-spun yarn, including ring spinning, friction spinning, vortex spinning, and rotor spinning. Among these, ring spinning is a mainstream technology for producing core-spun yarn. Ring-spun core-spun yarn is produced by adding a filament feeding device to a regular ring spinning machine. This allows the filament to be fed in from the center of the fiber sliver, and the short fiber sliver is twisted by the rotation of the air ring, causing it to wrap around the filament to form a core-spun yarn. However, the presence of the twisting triangle in ordinary ring spinning causes fuzz on the surface of the core-spun yarn, and it is also prone to fiber leakage. To eliminate fuzz, compact spinning technology has been extensively researched. Its core principle is to add a gathering device in front of the front roller nip, so that the short fiber sliver is gathered before being twisted, increasing the adhesion and cohesion between the edge fibers and the main body of the twisted sliver, thereby reducing yarn fuzz. However, the current ring-spun core-spun yarn is still very prone to fiber leakage. In order to ensure the covering effect and yarn quality of the core-spun yarn, factories usually adopt the method of increasing the proportion of outer covering fibers, resulting in the proportion of core fibers in the yarn body generally being less than 15%.

[0004] To overcome the aforementioned problems, patent application CN202111337262.3 discloses a core-spun spinning device and a novel core-spun spinning method with full core coverage. This core-spun spinning device adds an auxiliary core-spun device between the front roller nip and the yarn guide hook of a conventional ring spinning machine. The auxiliary core-spun device includes a first yarn path for conveying the outer layer material, a second yarn path for conveying the core layer material, and a wrapping point for wrapping and converging. During the spinning process, the short fiber sliver and the filament form a "Y"-shaped twisted structure with the filament in a straightened state. The filament remains straight at the wrapping point, and the short fiber sliver wraps around the outer layer of the filament at the wrapping point due to the twisting rotation of the filament and its own partial twist, thus forming a core-spun yarn with excellent coverage, solving the problem of exposed fibers in ring-spun core-spun yarn. However, the device has the following shortcomings: First, the capacity of the first yarn channel for transmitting short fiber slivers is limited. During high-speed transmission, the short fiber slivers can easily clog the first yarn channel, causing yarn breakage. Second, when the short fiber slivers pass through the first yarn channel, they often come into contact with the side wall of the yarn channel and cannot fully spread out, resulting in limited coverage area and limited coverage effect. The core filament ratio encounters a bottleneck and is difficult to reach 70%.

[0005] In view of this, it is necessary to design an improved core spinning device, method and application based on the principle of calculus to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a core spinning device, method, and application based on the principle of calculus. This device, by setting a negative pressure suction port on a shaped plate and simultaneously setting a corresponding negative pressure airflow guiding component above the suction port, allows for the diffusion and spreading of short fiber slivers in both width and length directions through the synergistic effect of the diffusion guide holes and the negative pressure suction mechanism. This results in spread short fibers of a certain width, with parallel and uniform fiber height distribution on the mesh ring. Simultaneously, it ensures that the distance between the core filament and the short fiber sliver on the front roller is 2-5 mm, so that the core yarn formed in the core wrapping area is in a straight line with the core filament conveyed to the mesh ring, forming a "Y"-shaped structure with the short fiber sliver conveyed to the mesh ring. The rotation of the core filament drives the short fiber sliver to tightly wrap around the core filament in the core wrapping area, forming a core yarn with a larger core filament ratio and higher quality.

[0007] To achieve the above-mentioned objectives, the present invention provides a core spinning device based on the principle of calculus, including a feeding unit, a calculus core wrapping unit, a softening integral yarn guiding unit, and a core yarn winding unit.

[0008] The feeding unit includes a short fiber feeding unit for drawing roving into short fiber slivers and feeding them into the calculus core-wrapping unit, a steady-state filament feeding unit for feeding core filaments, and a front roller located at the input end of the calculus core-wrapping unit.

[0009] The calculus core wrapping unit includes a negative pressure adsorption component, a conveying component for providing power to the negative pressure adsorption component, a negative pressure airflow guiding component, and a core wrapping area for wrapping and converging; the negative pressure airflow guiding component is disposed above the negative pressure adsorption component and is used to provide diffused airflow to the short fiber sliver; the conveying component includes a front roller disposed above the front roller; the distance between the core filament and the short fiber sliver in the front jaw formed by the engagement of the front roller and the front roller is 2-5mm;

[0010] The short fiber sliver crosses and merges with the core filament at the core wrapping area and wraps around the core filament to form a core yarn. Then, the core yarn is transmitted to the core yarn winding unit for twisting and winding via the softening integral yarn guiding unit.

[0011] As a further improvement of the present invention, the negative pressure adsorption component includes a shaped plate, a transmission roller, and a mesh ring fitted on the outer surface of the shaped plate and the transmission roller; the shaped plate is provided with a negative pressure air intake with a width greater than or equal to the width of the short fiber sliver, and a negative pressure air intake mechanism is provided at the negative pressure air intake;

[0012] The negative pressure airflow guiding component is disposed above the irregular plate, including a guide housing and a diffusion guide hole inclinedly disposed on the guide housing; the negative pressure air intake on the irregular plate corresponds to the diffusion guide hole, so that the airflow passes through the diffusion guide hole and enters the negative pressure air intake.

[0013] As a further improvement of the present invention, the negative pressure airflow guiding assembly further includes an airflow stabilizing hole vertically disposed on the airflow guiding housing; the diffusion guiding hole and the airflow stabilizing hole are arranged sequentially along the advancing direction of the core filament and the short fiber sliver;

[0014] The airflow stabilizing hole includes one of the following shapes: ① an airflow stabilizing hole with a uniform diameter from top to bottom; ② an airflow stabilizing hole with a trumpet-shaped tail end along the airflow direction.

[0015] As a further improvement of the present invention, the steady-state wire feeding unit includes a core wire unwinding unit, a tension adjusting frame, and a guide wheel arranged sequentially along the core wire advancing direction;

[0016] The core wire unwinding unit includes a pair of unwinding rollers rotating in the same direction, which mesh with the winding rollers that wind the core wire; the tension adjusting frame includes multiple parallel tension adjusting rods; after the core wire unwinding unit unwinds the core wire from the winding rollers, the tension is adjusted by the tension adjusting frame and then guided onto the front roller by the guide wheel.

[0017] As a further improvement of the present invention, the conveying assembly further includes a transmission gear and an auxiliary conveying unit;

[0018] The front roller, the transmission gear, and the transmission roller are meshed together.

[0019] The auxiliary conveying unit includes a drive roller and a bridge component disposed between the front roller and the drive roller; the shaft of the front roller, the bridge component, and the shaft of the drive roller are connected; the front roller and the front roller are vertically aligned, and the drive roller and the drive roller are vertically aligned; the drive roller is in contact with the mesh ring.

[0020] The flow guide housing is embedded below the bridge component and connected to the shaft core of the front roller.

[0021] As a further improvement of the present invention, the softening integral yarn guide unit includes a connecting component connected to the bridge component and a softening and reinforcing core component connected to the connecting component;

[0022] The softening and reinforcing core component includes a heating softening block and a pressing and reinforcing block arranged sequentially along the advancing direction of the core yarn.

[0023] As a further improvement of the present invention, the short fiber feeding unit includes a bell mouth, a rear roller and a rear skin roller, and a middle roller and a middle skin roller arranged sequentially along the roving advance direction;

[0024] The core yarn winding unit includes a yarn guide hook, a wire traveler, a steel ring, and a yarn tube. The core yarn enters the air ring twisting section through the yarn guide hook, where the fibers of the outer layer of the core yarn are further twisted and tightened. The core yarn is then wound onto the yarn tube by the wire traveler on the steel ring.

[0025] As a further improvement of the present invention, the core yarn formed through the core wrapping area and the core filament fed into the mesh ring are in a straight line, and merge with the short fiber strips fed into the mesh ring to form a "y" shape; the short fiber strips fed into the core wrapping area are in a straight line.

[0026] The core wrapping area is located on the grid ring.

[0027] This invention also provides a core-spun spinning method based on the principle of calculus, which uses the aforementioned core-spun spinning device based on the principle of calculus to perform core-spun spinning, specifically including the following steps:

[0028] S1′. The roving is drawn into the short fiber sliver by the short fiber feeding unit and fed into the calculus core wrapping unit, and the core filament is fed into the calculus core wrapping unit through the steady-state feeding unit;

[0029] S2′. The core yarn and the short fiber sliver are fed into the front nip formed by the engagement of the front roller and the front skin roller at a distance of 2-5mm, and output to the mesh ring through the front nip; the short fiber sliver is spread evenly on the mesh ring with a certain width and fiber parallelism under the cooperation of the negative pressure suction mechanism and the negative pressure airflow guiding component; the rotation of the core yarn drives the short fiber sliver to wrap around the core yarn in the core wrapping area in sequence to the outer layer of the core yarn, forming a core yarn;

[0030] S3′. The core yarn is transmitted to the core yarn winding unit for twisting and winding via the softening integral yarn guiding unit.

[0031] This invention also provides an application of a core-spinning method based on the principle of calculus, which prepares the aforementioned...

[0032] The prepared core yarn is applied to clothing, fire blankets and ropes in the fire protection field; casual wear, sportswear, curtains and bed sheets in the clothing and home furnishing field; tents, clothing and shoes in the military field; and automotive interior fabrics, aerospace seat covers, high-speed rail seat covers and aviation thermal blankets in the transportation field.

[0033] The beneficial effects of this invention are:

[0034] (1) The core spinning device based on the principle of calculus provided by the present invention overcomes the technical prejudice that the core filament and the outer short fiber need to be superimposed together to form yarn before the ring spinning core yarn is formed. At the same time, it overcomes the technical problem of easy fiber exposure. It adopts a negative pressure air inlet set on the shaped plate, and a corresponding negative pressure airflow guiding component is set above the negative pressure air inlet. The negative pressure formed inside the shaped plate causes the surrounding air to gather towards it. At the same time, the negative pressure airflow guiding component causes the gathered airflow to form a diffused airflow through the diffusion guide hole. Under the mutual cooperation of the diffusion guide hole and the negative pressure air inlet, the short fiber sliver is spread out in a differential manner in the width and length directions. The differential short fiber sliver is evenly spread on the grid ring. At the same time, the short fiber sliver is also subjected to the tensile force in the conveying direction, which straightens the single fiber. Under the synergistic stretching of the two forces in the width and length directions, a differential short fiber sliver with a certain width, parallel fiber height and uniform distribution is obtained on the grid ring, which provides a guarantee for integral core spinning. In addition, by setting airflow stabilizing holes, the present invention further adheres the widened and flattened short fiber slivers to the surface of the mesh ring under the action of vertical airflow, preventing the differential sliver fibers from shaking and re-aggregating.

[0035] At the same time, ensure that the spacing between the core yarn and the short fiber sliver in the front roller nip is 2-5mm, so that the core yarn formed in the core wrapping area is in a straight line with the core yarn fed to the mesh ring, and forms a "Y" shaped structure with the short fiber sliver fed to the mesh ring. The rotation of the core yarn drives the short fiber sliver to fully and tightly wrap the core yarn to the outer layer of the core yarn in the core wrapping area, forming a core yarn with stronger wrapping tightness (more than 20% higher than traditional core-spun yarn), higher wrapping coverage (100% full coverage), larger core yarn ratio (up to 70%), and higher quality.

[0036] (2) This invention, by setting up a softening and reinforcing core component, first uses the high temperature of the softening block to soften the short fiber slivers on the outer layer of the initially formed core yarn. Through the twisting and self-rotation of the core filament, the fibers in the differential short fiber slivers rotate and revolve in an orderly manner, wrapping around the outer layer of the core filament. This increases the tightness and area of ​​the adhesion between the short fibers and the core filament, reduces the leakage of fiber ends, and eliminates the disorder and loose wrapping of the short fiber slivers, thereby improving the yarn quality. Then, through the pressing and reinforcing block, the friction force makes the fibers on the surface of the core yarn adhere even more tightly to the core filament during the twisting and rotation process, improving the smoothness of the yarn and reducing yarn hairiness. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of the core spinning device based on the principle of calculus of the present invention.

[0038] Figure 2 This diagram shows the connection relationships between the negative pressure adsorption component, the auxiliary conveying unit, and the negative pressure airflow guiding component.

[0039] Figure 3 This is a schematic diagram of the negative pressure airflow guiding component.

[0040] Figure 4 A schematic diagram of the structure of the flexible and reinforced core component.

[0041] Figure 5 A path diagram for forming a core yarn from short fiber slivers and core filaments.

[0042] Figure 6 The image shows the core yarn prepared in Example 1 magnified 35 times under a 3D microscope, with a scale bar of 500 μm.

[0043] Figure 7 The image shows the core yarn prepared in Example 2 magnified 35 times under a 3D microscope, with a scale bar of 500 μm.

[0044] Figure 8 The image shown is a 35x magnified image of the core-spun yarn prepared for Comparative Example 1 under a 3D microscope, with a scale bar of 500 μm.

[0045] Figure 9 The image shows the core yarn prepared for Comparative Example 2 magnified 35 times under a 3D microscope, with a scale bar of 500 μm.

[0046] Figure 10 The image shows the core yarn prepared for Comparative Example 3 magnified 35 times under a 3D microscope, with a scale bar of 500 μm.

[0047] Figure Labels

[0048] S1 - Roving; S11 - Short fiber sliver; F1 - Core yarn; S2 - Crimped yarn;

[0049] 10-Short fiber feeding unit; 11-Flare mouth; 12-Rear roller; 13-Rear skin roller; 14-Middle roller; 15-Middle skin roller; 16-Front roller;

[0050] 20-Steady-state wire feeding unit; 21-Core wire unwinding unit; 22-Tension adjusting frame; 23-Wire guide wheel;

[0051] 30-Calculus core wrapping unit; 31-Transmission gear; 32-Auxiliary conveying unit; 33-Negative pressure adsorption assembly; 34-Negative pressure airflow guiding assembly; 35-Core wrapping area; 321-Front roller; 322-Transmission roller; 323-Bridge component; 324-Groove; 331-Irregularly shaped plate; 332-Transmission roller; 333-Mesh ring; 334-Negative pressure suction port; 341-Guide housing; 342-Diffuser guide hole; 343-Airflow stabilizing hole;

[0052] 40-Softening integral yarn guide unit; 41-Connecting component; 42-Softening and reinforcing core component; 421-Heating softening block; 422-Pressure plate reinforcing block; 423-Arc-shaped groove; 4221-Fixing block; 4222-Tension adjusting plate;

[0053] 50-Curl yarn winding unit; 51-Yarn guide hook; 52-Steel wire traveler; 53-Steel ring; 54-Fine yarn tube. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0055] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0056] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0057] Please see Figures 1 to 5 As shown, this invention provides a core-spinning device based on the principle of calculus, including a feeding unit, a calculus core-wrapping unit 30, a softening integral yarn guiding unit 40, and a core-spinning yarn winding unit 50. During the yarn forming process, the short fiber sliver of the roving S1, drafted by the drafting system of the spinning frame, is diffused by the airflow of the calculus core-wrapping unit 30, and is differentially dispersed and spread into a highly straightened and fully spread flat strip of single fibers. Then, each fiber is sequentially and orderly wound around the outer layer of the self-rotating twisted core filament F1. Through continuous accumulation of core-wrapping of core filament F1, core-spinning yarn S2 is formed. The entire process adopts the principle of "differentiation followed by integration". At the same time, the softening integral yarn guiding unit 40 further makes the yarn structure more compact and improves the yarn quality, which is equivalent to further integration. Therefore, it is named a core-spinning device based on the principle of calculus.

[0058] The feeding unit includes a short fiber feeding unit 10 for drafting the roving S1 into short fiber slivers S11 and feeding them into the calculus core wrapping unit 30, a steady-state feeding unit 20 for feeding the core filament F1, and a front roller 16 located at the input end of the calculus core wrapping unit 30.

[0059] The calculus-based core wrapping unit 30 includes a negative pressure adsorption component 33, a conveying component for powering the negative pressure adsorption component 33, a negative pressure airflow guiding component 34, and a core wrapping area 35 for wrapping and converging. The conveying component includes a front slip roller 321 positioned above the front roller 16; the distance between the core filament F1 and the short fiber sliver S11 in the front jaw formed by the engagement of the front roller 16 and the front slip roller 321 is 2-5 mm. This arrangement ensures that the core filament F1 and the short fiber sliver S11 maintain a certain distance as they pass through the front jaw formed by the engagement of the front roller 16 and the front slip roller 321, preventing direct entanglement. This facilitates the smooth conveyance of the short fiber sliver S11 to the subsequent calculus-based core wrapping unit 30, and also provides favorable conditions for the subsequent differential-integral core spinning "Y"-shaped core twisting structure. The negative pressure airflow guiding component 34 is disposed above the negative pressure adsorption component 33 and is used to provide diffusion airflow for the short fiber sliver S11. With the cooperation of the negative pressure adsorption component 33 and the negative pressure airflow guiding component 34, the short fiber sliver S11 is differentially dispersed and spread into a highly straight and fully spread single fiber flattened belt.

[0060] The differentially dispersed short fiber slivers S11 intersect and converge with the core filament F1 at the core wrapping area 35. Under the action of yarn twisting, the core filament F1 rotates, causing the differentially dispersed short fiber slivers S11 to wrap around the outer layer of the core filament F1, forming a core-wound yarn S2. Compared with traditional ring-spun core-spun yarn, it has stronger wrapping tightness (more than 20% higher than traditional core-spun yarn), higher wrapping coverage (100% full coverage), larger core filament ratio (up to 70%), and higher quality core-wound yarn S2. Then, the core-wound yarn S2 is transmitted to the core-wound yarn winding unit 50 via the softening integral yarn guiding unit 40 for twisting and winding into a yarn package.

[0061] like Figure 1 As shown, the short fiber feeding unit 10 includes a bell mouth 11, a rear roller 12 and a rear top roller 13, a middle roller 14 and a middle top roller 15 arranged sequentially along the roving S1's forward direction. Under the drafting action of the spinning frame drafting system composed of the rear roller 12 and rear top roller 13, the middle roller 14 and middle top roller 15, the front roller 16 and the front top roller 321, the roving S11 gradually forms short fiber slivers S11. The short fiber slivers S11 are output through the front roller nip formed by the engagement of the front roller 16 and the front top roller 321 and fed into the differential core-wrapping unit 30. During this process, by controlling the rotational speeds of the front roller 16, the middle roller 14, and the rear roller 12, the overall drafting ratio is adjusted to ensure that the required quantity of short fiber slivers S11 is continuously and smoothly fed into the differential core-wrapping unit 30.

[0062] The steady-state wire feeding unit 20 includes a core wire unwinding unit 21, a tension adjusting frame 22, and a guide wheel 23 arranged sequentially along the forward direction of the core wire F1.

[0063] Specifically, the core wire unwinding unit 21 includes a pair of unwinding rollers rotating in the same direction, which mesh with the winding rollers that wind the core wire F1. This configuration allows for the active unwinding of the core wire F1 through the rotation of the unwinding rollers. The tension adjusting frame 22 includes multiple parallel tension adjusting rods. During this process, after the core wire unwinding unit 21 actively unwinds the core wire F1 from the winding rollers, the tension is stabilized under the adjustment of the tension adjusting frame 22, and the wire is continuously fed to the guide roller 23. Under the guidance of the guide roller 23, the wire is fed into the front roller jaws formed by the engagement of the front roller 16 and the front skin roller 321.

[0064] In some embodiments, the steady-state feeding unit 20 employs an existing active feeding mechanism for spandex yarns in elastic core-spun yarns.

[0065] like Figure 1 and Figure 2As shown, the negative pressure adsorption assembly 33 includes a shaped plate 331, a transmission roller 332, and a mesh ring 333 fitted around the outer surfaces of the shaped plate 331 and the transmission roller 332. To tension the mesh ring 333, the negative pressure adsorption assembly 33 also includes a tensioning mechanism (not shown in the figure). The mesh ring 333 is fitted around the outer surfaces of the shaped plate 331, the transmission roller 332, and the tensioning mechanism. The shaped plate 331 has a hollow internal structure and a negative pressure suction port 334 with a width greater than or equal to the width of the short fiber sliver S11. A negative pressure suction mechanism is installed at the negative pressure suction port 334, and under the action of the negative pressure suction mechanism, the air around the negative pressure suction port 334 converges towards it. The mesh ring 333 only allows airflow to pass through, serving to support and transport the short fiber sliver S11. In this process, the short fiber sliver S11 output from the front roller jaws is conveyed onto the mesh ring 333 and passes through the negative pressure suction port 334. Since the width of the negative pressure suction port 334 is greater than or equal to the width of the short fiber sliver S11, the short fiber sliver S11 is opened and widened, and evenly spread on the mesh ring 333 with a certain width and fiber parallelism, preventing the differential sliver fibers of the short fiber sliver S11 from shaking and re-aggregating. In addition, the negative pressure suction port 334 can also capture uncontrolled floating fibers in the short fiber sliver S11.

[0066] The negative pressure suction port 334 is either a structure with equal width at the top and bottom or a structure with a narrow top and a wide bottom. Preferably, the negative pressure suction port 334 is a structure with a narrow top and a wide bottom, that is, the end of the negative pressure suction port 334 closer to the short fiber feeding unit 10 is narrower (but still not less than the width of the short fiber sliver S11 conveyed by the front roller 16), and the end farther away from the short fiber feeding unit 10 is wider.

[0067] The negative pressure airflow guiding component 34 is disposed above the irregularly shaped plate 331, and the shape of the guide housing 341 of the negative pressure airflow guiding component 34 is consistent with that of the irregularly shaped plate 331 (i.e., as shown). Figure 3As shown, the side of the flow guide housing 341 near the irregular plate 331 is curved, and a boss is provided on the side of the flow guide housing 341 facing the irregular plate 331. The boss is perpendicular to the running direction of the short fiber sliver S11, and the height of the boss is 1.0-3.0mm. The thicker the short fiber sliver S11 used in spinning, the larger the height of the boss, and vice versa. Multiple rows of diffusion guide holes 342 are provided on the flow guide housing 341. The diffusion guide holes 342 correspond to the negative pressure air intake 334 on the irregular plate 331 so that the airflow passes through the diffusion guide holes 342 and enters the negative pressure air intake 334. With this configuration, the negative pressure generated inside the irregular plate 331 causes the surrounding air to gather towards it. At the same time, the negative pressure airflow guide component 34 causes the gathered airflow to form a diffused airflow through the diffusion guide hole 342. That is, after the airflow passes through the diffusion guide hole 342, a diffused airflow will be formed between the irregular plate 331 and the guide housing 341, causing the flexible fiber (i.e. the short fiber sliver S11 output through the front roller jaws) passing through the irregular plate 331 and the guide housing 341 to be differentially widened and flattened into a fiber flat strip of a certain width and adsorbed onto the mesh ring 33. Specifically, the air around the negative pressure suction port 334 and the negative pressure airflow guiding component 34 forms a diffused airflow under the action of the diffusion guide hole 342. The diffused airflow further widens the short fiber sliver S11. Under the synergistic diffusion and adsorption effect of the diffusion guide hole 342 and the negative pressure suction mechanism, on the one hand, the short fiber sliver S11 is stretched to both sides (stretched in the width direction) and then evenly spread on the mesh ring 333; on the other hand, the short fiber sliver S11 is also subjected to the tensile force in the conveying direction, which straightens the individual fibers. Under the synergistic stretching of the two forces in the width and length directions, the short fiber sliver S11 is micro-differentiated and dispersed to the maximum extent to widen the fiber, while neither being excessively widened to the point of gaps nor being broken. Finally, it is evenly spread on the mesh ring 333 with a certain width and fiber parallelism. At the same time, the airflow passing through the diffusion guide hole 342 can further firmly adsorb the micro-differentiated and dispersed open-fiber widened short fiber sliver S11 onto the mesh ring 333, preventing the micro-differentiated and dispersed open-fiber widened short fiber from accumulating and shaking. The uniformly spread short fiber sliver S11 is adsorbed onto the mesh ring 333 without rotating. Finally, under the action of the taut and self-rotating core yarn F1, the short fiber sliver S11 undergoes core-type revolution and twisting to form a core yarn S2 with a special structure.

[0068] like Figure 3 a and Figure 3 As shown in b, this embodiment is provided with two rows of diffusion guide holes 342. The inclination angle of the diffusion guide holes in the same row gradually increases from the middle to both sides, and the inclination angle ranges from 0° to 60°. After the airflow around the negative pressure adsorption component 33 passes through the inclined diffusion guide holes 342, the airflow changes from a turbulent state to a stable diffusion state to both sides, so as to widen and flatten the short fiber strip S11 to both sides.

[0069] The negative pressure airflow guiding assembly 34 also includes multiple airflow stabilizing holes 343 vertically disposed on the airflow guiding housing 341. The diffusion guiding holes 342 and the airflow stabilizing holes 343 are sequentially arranged along the advancing direction of the core filament F1 and the short fiber sliver S11. The airflow stabilizing holes 343 are used to further adhere the widened and flattened short fiber sliver S11 to the surface of the mesh ring 333 under the action of vertical airflow. Figure 3 As shown in b, the airflow stabilizing hole 343 includes one of the following shapes: ① an airflow stabilizing hole with a uniform diameter from top to bottom; ② an airflow stabilizing hole with a trumpet-shaped tail end along the airflow direction. When the airflow stabilizing hole 343 is in the second form, the trumpet shape at the tail end can obtain a larger range of stabilized airflow, making the widened and flattened short fiber strips S11 more firmly attached to the surface of the mesh ring 333.

[0070] like Figure 1 and Figure 2 As shown, the conveying assembly for providing power to the negative pressure adsorption assembly 33 also includes a transmission gear 31 and an auxiliary conveying unit 32.

[0071] Specifically, the front roller 16, drive gear 31, and drive roller 332 are meshed together. With this configuration, the rotation of the front roller 16 drives the drive gear 31 to rotate, which in turn drives the drive roller 332 to rotate synchronously with the front roller 16. This causes the mesh ring 333 to rotate synchronously with the drive roller 332, thus conveying the short fiber sliver S11 and the core filament F1 forward. Under the continuous conveying of the mesh ring 333, the short fiber sliver S11 and the core filament F1, at the core wrapping area 35, are finally twisted by the coordinated twisting action of the ring, traveler, and spindle, causing the taut core filament F1 to undergo self-twisting. This causes the fibers to spread out in a highly straight, fully dispersed, flattened ribbon-like shape, and each fiber rotates and wraps around the outer layer of the self-twisting core filament F1 in an orderly manner. The short fiber sliver S11 wraps around the outer layer of the core filament F1 to form the core yarn S2. By continuously gathering and wrapping the core yarn F1, the core yarn S2 is formed. The whole process adopts the principle of "differentiation first and integration later".

[0072] The auxiliary conveying unit 32 includes a drive roller 322 and a bridging component 323 disposed between the front roller 321 and the drive roller 322. The shaft of the front roller 321, the bridging component 323, and the shaft of the drive roller 322 are connected (i.e., the bridging component 323 connects the shafts of the front roller 321 and the drive roller 322, making them integrated). The front roller 321 is vertically aligned with the front roller 16, and the drive roller 322 is vertically aligned with the drive roller 332. The drive roller 322 contacts the mesh ring 333. With this arrangement, the rotation of the front roller 16 drives the front roller 321 to rotate, and at the same time, the friction between the drive roller 322, the drive roller 332, and the mesh ring 333 drives the drive roller 322 to rotate. Under the mutual clamping of the drive roller 322 and the drive roller 332, the transmission of the mesh ring 213 is made more stable, providing stable conditions for the wrapping process.

[0073] In some embodiments, the drive roller 322 has a groove 324 in the middle; the width of the groove 324 is less than the width of the mesh ring 333 and greater than one-third of the width of the drive roller 322. This arrangement allows the groove 324 to create a certain gap between the drive roller 322 and the drive roller 332, enabling the short fiber slivers S11, core filaments F1, and core yarn S2 on the mesh ring 333 to pass smoothly. Furthermore, the raised structures on both sides, together with the drive roller 332, clamp the mesh ring 333 and drive it to rotate along the yarn forming direction, achieving steady conveying.

[0074] The flow guide housing 341 is embedded below the bridge component 323 and connected to the shaft of the front roller 321, so that there is a certain gap between the flow guide housing 341 and the mesh ring 333, which facilitates the passage of short fiber slivers S11 and core filaments F1.

[0075] like Figure 5As shown, the core yarn S2 formed by the core wrapping area 35 is in a straight line with the core filament F1 on the feed mesh ring 333, and merges with the short fiber sliver S11 on the feed mesh ring 333 in a "y" shape; the short fiber sliver S11 fed in front of the core wrapping area 35 is in a straight line. With this configuration, since the core yarn S2 moving upwards and the core filament F1 fed to the mesh ring 333 are in a straight line, the twist generated by the rotation of the air ring is transmitted from bottom to top to the core wrapping area 35. Then, most of the twist is transmitted to the core filament F1, making the twist and tension of the core filament F1 much greater than that of the short fiber sliver S11. This makes the core filament F1 dominant during the twisting process, providing it with sufficient power to rotate, while keeping it in a straight state; while the twist is difficult to achieve along the short fiber sliver S11. The axial direction of the fiber sliver S11 is transmitted to the short fiber sliver S11. Simultaneously, the negative pressure suction port 334 and the negative pressure airflow guiding component 34 further improve the straightness, parallelism, and spread of the short fibers in the short fiber sliver S11, causing them to spread on the mesh ring 333. Under the rotational action of the core filament F1, the short fibers in the short fiber sliver S11 only undergo a revolution-wrapping motion without twisting, thus being uniformly and tightly wound onto the core filament F1. Furthermore, the short fiber sliver S11 in the core-wrapped area 35 is tightly adsorbed onto the mesh ring 333, further hindering the transmission of twist in the short fiber sliver S11, ensuring that the short fiber sliver S11 is taut, highly parallel, and oriented in a twist-free state.

[0076] The core wire F1 input to the grid ring 333 before the core wrapping area 35 needs to be configured with a large tension to provide auxiliary conditions to ensure that the core wire F1 remains straight at the core wrapping area 35, so as to improve the wrapping effect.

[0077] The distance between the core wrapping area 35 and the nip of the front roller 16 is greater than the fiber length of the short fiber sliver S11. This arrangement ensures that, firstly, the individual fibers in the short fiber sliver S11 can be sufficiently stretched and straightened; secondly, the greater length further increases the twist and tension of the core filament F1, which is beneficial for the core filament F1 to rotate and wrap the short fiber sliver S11; and thirdly, the high-speed rotation of the core filament F1 can also produce a certain drafting effect on the short fiber sliver S11, further improving the yarn quality.

[0078] like Figure 2 and Figure 4 As shown, the softening integral yarn guide unit 40 includes a connecting component 41 connected to the bridge component 323 and a softening and reinforcing core component 42 connected to the connecting component 41. The softening and reinforcing core component 42 includes a heating softening block 421 and a pressing and reinforcing block 422 arranged sequentially along the advancing direction of the core yarn S2.

[0079] Specifically, the heating softening block 421 is made of a heating ceramic block, which can be heated to 130-220℃ when energized, and can be adjusted to the corresponding glass transition temperature according to the material characteristics. The higher the glass transition temperature of the outer layer of short fibers, the higher the temperature of the heating softening block 421. The high temperature can soften the short fiber slivers S11 of the initially formed core yarn S2, and the twisting and rotation of the core filament F1 makes the outer short fiber slivers S11 further adhere to the core filament F1, improving the yarn quality. The heating softening block 421 has an arc-shaped groove 423 in the middle, which facilitates the clamping of the core yarn S2 and positions the yarn formation path, playing a guiding role in yarn formation and making the yarn formation process more stable.

[0080] The pressing and reinforcing block 422 includes a fixing block 4221 and a tension adjusting plate 4222. The core yarn S2 passes between the fixing block 4221 and the tension adjusting plate 4222. Simultaneously, the core yarn S2 contacts the tension adjusting plate 4222 with a certain tension. Through friction, the surface fibers of the core yarn S2 adhere more tightly to the core filament F1 during twisting and rotation, improving yarn smoothness and reducing yarn hairiness. By increasing or decreasing the number of tension adjusting plates 4222, the friction between the tension adjusting plate 4222 and the core yarn S2 can be adjusted to adapt to different raw material characteristics. It can be seen that after the core yarn S2 passes through the softening and reinforcing core component 42, its outer short fiber covering layer adheres more tightly to the outer layer of the core filament F1 under high temperature and pressure.

[0081] like Figure 2 and Figure 5 As shown, the compliant and reinforced core component 42 is located on the left side of the overall device axis so that when the core filament F1 and the short fiber sliver S11 meet and form yarn in the core wrapping area 35, the overall structure further forms a "y" shaped structure.

[0082] like Figure 1 As shown, the core yarn winding unit 50 includes a yarn guide hook 51, a wire traveler 52, a steel ring 53, and a yarn tube 54. The core yarn S2 enters the air ring twisting section through the yarn guide hook 51. The fibers of the outer layer of the core yarn S2 are further twisted and tightened, and then wound onto the yarn tube 54 by the wire traveler 52 on the steel ring 53.

[0083] This invention also provides a core-spun spinning method based on the principle of calculus, which uses the aforementioned core-spun spinning device based on the principle of calculus to perform core-spun spinning, specifically including the following steps:

[0084] S1′. The roving S1 is drawn into a short fiber sliver S11 by the short fiber feeding unit 10 and fed into the calculus core wrapping unit 30. The core filament F1 is fed into the calculus core wrapping unit 30 through the steady-state feeding unit 20.

[0085] S2′. Core yarn F1 and short fiber sliver S11 are fed into the front nip formed by the engagement of front roller 16 and front skin roller 321 at a distance of 2-5mm, and output to the mesh ring 333 through the front nip at the speed required by the process; under the cooperation of negative pressure suction mechanism and negative pressure airflow guiding component 34, short fiber sliver S11 is evenly laid on the mesh ring 333 with a certain width and fiber parallelism; core yarn F1 rotates and drives short fiber sliver S11 to wrap around the outer layer of core yarn F1 in the core wrapping area 35 in sequence to form core yarn S2;

[0086] S3′. The core yarn S2 passes through the softening integral yarn guiding unit 40. Under the action of high temperature and pressure friction, the outer short fiber strips of the core yarn S2 adhere more tightly to the outer layer of the core yarn F1. Then it is transferred to the core yarn winding unit 50 for twisting and winding.

[0087] This invention also provides an application of the aforementioned core-spinning method based on calculus principles. Utilizing this core-spinning device and method, inorganic filament fiber materials undergo non-destructive core-spinning processing, first reverse-twisting to form core yarns, then forward-twisting to form core yarns. Furthermore, it achieves excellent core yarn coverage (up to 70%) and high yarn quality in the core-spinning process of fiber materials. For example, when the outer short fiber sliver S11 is made of polyimide short fiber and the core yarn F1 is made of inorganic basalt filament, the resulting core-spinned yarn S2 can be used in firefighting clothing and ropes; when the outer short fiber sliver S11 is made of cotton fiber and the core yarn F1 is made of polyester filament, the resulting core-spinned yarn S2 can be used in casual wear, sportswear, bed sheets, and other products in the apparel and home furnishing sectors.

[0088] The present invention will now be described in detail through specific embodiments.

[0089] Example 1

[0090] The core spinning device based on the principle of calculus of this invention is used for core spinning. The specific process parameters of the core spinning process are as follows: the core filament F1 is a twisted yarn formed by a composite of 12tex basalt filament and 20D flame-retardant nylon filament; the roving S1 is a 520tex flame-retardant fiber blended roving; the output speed of the short fiber sliver S11 and the core filament F1 from the front roller 16 is 12.22 m / min; the rotation speed of the spinning tube 54 is 11000 r / min; the twist of the yarn is 90 T / 10 cm; and the total draft ratio (i.e., the short fiber feeding unit 10 pairs of short fiber slivers) is [not specified in the original text]. The draft ratio of S11 is 62.58; the linear density of the corrugated flame-retardant fiber blended roving (i.e., the linear density of roving S1 after drafting) is 8.31 tex; the draft ratio of the back zone (i.e., the difference in linear speed between the front roller 16 and the middle roller 14) is 1.25; the spacing between the core filament F1 and the short fiber sliver S11 on the front roller nip is 5 mm; the shape of the airflow stabilizing hole 343 is ① an airflow stabilizing hole with the same diameter from top to bottom; the heating softening block 421 is started and the temperature is set to 180℃, and the core filament F1 accounts for 70% of the total yarn in the resulting core yarn S2.

[0091] Figure 6 This is a 35x magnified image of the yarn spun in Example 1 under a 3D microscope. Figure 6 It can be seen that in the obtained core yarn, the outer flame-retardant fiber completely covers the core filament material, and the overall yarn covering effect is good, with no exposed filaments. At the same time, the outer covering fiber has a high degree of parallelism, forming a better yarn appearance.

[0092] Example 2

[0093] Core-spun yarn was spun using the core-spun spinning device based on the principle of calculus of this invention. Compared with Example 1, the difference lies in the shape of the airflow stabilizing hole 343, which is a trumpet-shaped airflow stabilizing hole at the tail end along the airflow direction. The heating softening block 421 is activated, and the temperature is set to 180°C. Other aspects are largely the same as in Example 1 and will not be repeated here. In the resulting core-spun yarn S2, the core filament F1 accounts for 70% of the total yarn.

[0094] Figure 7 This is a 35x magnified image of the yarn spun in Example 2 under a 3D microscope. Figure 7 It can be seen that the core yarn obtained in Example 2 has a cleaner appearance and fewer hairs than that in Example 1, indicating that when the airflow stabilizing hole is trumpet-shaped at the end along the airflow direction, it is more effective for the outer fiber to cover the core yarn.

[0095] Comparative Example 1

[0096] Core-spun yarn was spun using a traditional ring spinning core-spun device, without the calculus-integral core-wrapping unit 30 and the softening integral yarn guiding unit 40. The remaining parameters were largely the same as in Example 1 and will not be repeated here. The core filament F1 in the resulting core-spun yarn accounted for 72% of the total yarn (during the spinning process, some short fibers were sucked away by the negative pressure suction pipe, thus increasing the proportion of long filaments in the final yarn).

[0097] Figure 8 This is a 35x magnified image of the core-spun yarn spun in Comparative Example 1 under a 3D microscope. Figure 8 It can be seen that the core-spun yarn obtained in Comparative Example 1 exhibited a very significant "loose yarn" phenomenon, with basalt exposed and the yarn having a lot of visible fuzz.

[0098] Comparative Example 2

[0099] Core-spun yarn was spun using the core-spun spinning device based on the principle of calculus of this invention. The difference between this invention and Example 1 is that the negative pressure airflow guiding component 34 is not provided; otherwise, it is largely the same as Example 1 and will not be described again here. The core filament F1 accounts for 70% of the total yarn in the resulting core-spun yarn.

[0100] Figure 9 This is a 35x magnified image of the core-spun yarn spun in Comparative Example 2 under a 3D microscope. Figure 9 It can be seen that the yarn obtained in Comparative Example 2 does not have a core leak, but the overall covering effect is slightly worse than that in Example 1.

[0101] Comparative Example 3

[0102] By adjusting the softening integral yarn guiding unit 40, the core yarn S2 formed in the core wrapping area 35 is not on a straight line with the core yarn F1 conveyed to the mesh ring 333, thereby disrupting the "y" shaped structure. The remaining parameters are roughly the same as in Example 1, and will not be repeated here.

[0103] Figure 10 This is a 35x magnified image of the yarn spun in Comparative Example 3 under a 3D microscope. Figure 10 As can be seen, in the yarn obtained in Comparative Example 3, since the "y"-shaped structure was not formed during yarn formation, the overall yarn structure is similar to that of a ply yarn, with the core filament and short fiber sliver intertwined, the core filament exposed on the surface of the yarn, and the leakage of filaments is relatively serious.

[0104] The core-spun yarns obtained in Examples 1-2 and Comparative Examples 1-3 (the core-spun yarn of Comparative Example 1) were subjected to basic yarn index tests, and the average values ​​of the obtained data were compared. The specific results are shown below:

[0105] Table 1 Comparison of tensile mechanical properties

[0106]

[0107]

[0108] As shown in Table 1, the tensile breaking strength of the core-spun yarns spun in Examples 1 and 2 is significantly higher than that of the core-spun yarns spun in Comparative Example 1 and Comparative Example 3. This is mainly because, in Examples 1 and 2, the rigid basalt core filaments of the flame-retardant fiber-coated basalt core yarns spun using the calculus-based core-spun spinning device of the present invention are straightened within the yarn, resulting in high breaking strength and low elongation at break. In contrast, in Comparative Example 1, the basalt core filaments of the flame-retardant fiber-coated basalt core yarn spun using the traditional ring spinning method are spirally distributed, making the rigid basalt prone to breakage under shear force during stretching, thus resulting in lower strength. The core-spun yarn in Comparative Example 3 is similar to a ply yarn, where the core filaments and short fibers share the force during stretching, causing the core filaments and short fibers to twist and turn, thus reducing strength.

[0109] Table 2 Comparison of Feather Quantity

[0110] Example 1mm 2mm 3mm 4mm 5mm 6mm 8mm 10mm Example 1 427.90 36.20 6.30 3.90 0.80 0.10 0.00 0.00 Example 2 552.00 51.20 7.80 1.50 0.50 0.10 0.00 0.00 Comparative Example 1 1073.31 149.40 24.00 5.15 1.15 0.30 0.20 0.35 Comparative Example 2 597.85 67.35 8.75 3.75 0.90 0.10 0.00 0.00 Comparative Example 3 859.37 97.83 19.65 4.10 1.10 0.30 0.20 0.10

[0111] As shown in Table 2, the hairiness of the core-spun yarn spun in Examples 1 and 2 is significantly improved compared with that of the core-spun yarn spun in Comparative Examples 1-3. The hairiness of the flame-retardant fiber-coated basalt core-spun yarn with a length of more than 3 mm spun in Examples 1 and 2 using the core-spun yarn spinning device based on the principle of calculus of the present invention is basically eliminated, and the number of short hairs with a length of 1 mm is also reduced by about 50% compared with Comparative Example 1.

[0112] Table 3 Comparison of Straw Uniformity Performance

[0113]

[0114] As shown in Table 3, the evenness of the core-spun yarns spun in Examples 1 and 2 is better than that of the core-spun yarn in Example 1. The 50% coarseness and fineness and 200% neps of the flame-retardant fiber-coated basalt core-spun yarns spun in Examples 1 and 2 are basically eliminated, while the flame-retardant fiber-coated basalt core-spun yarn spun in Example 1 has more yarn defects in the 50% coarseness and fineness and 200% neps.

[0115] In summary, this invention provides a core-spinning device, method, and application based on the principle of calculus. This device, by setting a negative pressure suction port on a shaped plate and simultaneously setting a corresponding negative pressure airflow guiding component above the suction port, allows for the diffusion and spreading of short fiber slivers in both width and length directions through the synergistic effect of the diffusion guide holes and the negative pressure suction mechanism. This results in spread short fibers of a certain width, with parallel and uniform fiber height distribution on the mesh ring. Simultaneously, it ensures that the distance between the core yarn and the short fiber sliver in the front roller nip is 2-5 mm, ensuring that the core yarn formed in the core-wrapping area and the core yarn conveyed to the mesh ring are aligned. The yarn is in a straight line and forms a "Y" shape with the short fiber slivers fed to the mesh ring. The core yarn rotates and drives the short fiber slivers to tightly wrap around the core yarn in the core wrapping area. By setting up a smoothing and reinforcing core component, the high temperature of the smoothing block is used to soften the short fiber slivers on the outer layer of the initially formed core yarn. The twisting and rotation of the core yarn makes the short fiber slivers on the outer layer adhere more tightly to the core yarn, improving the core wrapping tightness and yarn quality. Then, by using the pressing and reinforcing block, the friction force makes the fibers on the surface of the yarn adhere even more tightly to the core yarn during the twisting and rotation process, improving the smoothness of the yarn and reducing yarn hairiness.

[0116] 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 preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A spinning device based on the principle of calculus, characterized in that, It includes a feeding unit, a calculus-integral core wrapping unit, a softening integral yarn guiding unit, and a core yarn winding unit; The feeding unit includes a short fiber feeding unit for drawing roving into short fiber slivers and feeding them into the calculus core-wrapping unit, a steady-state filament feeding unit for feeding core filaments, and a front roller located at the input end of the calculus core-wrapping unit. The calculus core wrapping unit includes a negative pressure adsorption component, a conveying component for providing power to the negative pressure adsorption component, a negative pressure airflow guiding component, and a core wrapping area for wrapping and converging; the negative pressure airflow guiding component is disposed above the negative pressure adsorption component and is used to provide diffused airflow to the short fiber sliver; the conveying component includes a front roller disposed above the front roller; the distance between the core filament and the short fiber sliver in the front jaw formed by the engagement of the front roller and the front roller is 2-5mm; The negative pressure adsorption assembly includes a shaped plate, a transmission roller, and a mesh ring fitted on the outer surface of the shaped plate and the transmission roller; the shaped plate is provided with a negative pressure air intake with a width greater than or equal to the width of the short fiber sliver, and a negative pressure air intake mechanism is provided at the negative pressure air intake; the negative pressure airflow guiding assembly is disposed above the shaped plate and includes a guide shell and multiple rows of diffusion guide holes inclinedly disposed on the guide shell; The negative pressure airflow guiding assembly further includes an airflow stabilizing hole vertically disposed on the airflow guiding housing; the diffusion guiding hole and the airflow stabilizing hole are arranged sequentially along the advancing direction of the core filament and the short fiber sliver; The conveying assembly also includes a transmission gear and an auxiliary conveying unit; The auxiliary conveying unit includes a drive roller and a bridge component disposed between the front roller and the drive roller; The softening integral yarn guide unit includes a connecting component connected to the bridge component and a softening and reinforcing core component connected to the connecting component; The softening and reinforcing core component includes a heating softening block and a pressing and reinforcing block arranged sequentially along the advancing direction of the core yarn; The short fiber sliver crosses and merges with the core filament at the core wrapping area and wraps around the core filament to form a core yarn. Then, the core yarn is transmitted to the core yarn winding unit for twisting and winding via the softening integral yarn guiding unit.

2. The spinning device based on the principle of calculus according to claim 1, characterized in that, The negative pressure air intake on the irregular plate corresponds to the diffusion guide hole, so that the airflow passes through the diffusion guide hole and enters the negative pressure air intake.

3. The spinning device based on the principle of calculus according to claim 2, characterized in that, The airflow stabilizing hole includes one of the following shapes: ① an airflow stabilizing hole with a uniform diameter from top to bottom; ② an airflow stabilizing hole with a trumpet-shaped tail end along the airflow direction.

4. The spinning device based on the principle of calculus according to claim 1, characterized in that, The steady-state wire feeding unit includes a core wire unwinding unit, a tension adjusting frame, and a guide wheel arranged sequentially along the core wire advancing direction; The core wire unwinding unit includes a pair of unwinding rollers rotating in the same direction, which mesh with the winding rollers that wind the core wire; the tension adjusting frame includes multiple parallel tension adjusting rods; after the core wire unwinding unit unwinds the core wire from the winding rollers, the tension is adjusted by the tension adjusting frame and then guided by the guide wheel into the front jaw formed by the engagement of the front roller and the front skin roller.

5. The spinning device based on the principle of calculus according to claim 2, characterized in that, The front roller, the transmission gear, and the transmission roller are meshed together. The shaft core of the front roller, the bridge component, and the shaft core of the drive roller are connected; the front roller and the front roller are vertically aligned, and the drive roller and the drive roller are vertically aligned; the drive roller is in contact with the mesh ring. The flow guide housing is embedded below the bridge component and connected to the shaft core of the front roller.

6. The spinning device based on the principle of calculus according to claim 1, characterized in that, The short fiber feeding unit includes a bell mouth, a rear roller and a rear skin roller, and a middle roller and a middle skin roller arranged sequentially along the roving advance direction; The core yarn winding unit includes a yarn guide hook, a wire traveler, a steel ring, and a yarn tube. The core yarn enters the air ring twisting section through the yarn guide hook, where the fibers of the outer layer of the core yarn are further twisted and tightened. The core yarn is then wound onto the yarn tube by the wire traveler on the steel ring.

7. The spinning device based on the principle of calculus according to claim 2, characterized in that, The core yarn formed through the core wrapping area is in a straight line with the core filament fed into the mesh ring, and merges with the short fiber strips fed into the mesh ring in a "y" shape; the short fiber strips fed into the core wrapping area are in a straight line; The core wrapping area is located on the grid ring.

8. A core-spinning method based on the principles of calculus, characterized in that, The core-wrapping spinning method based on the principle of calculus, as described in any one of claims 1 to 7, specifically includes the following steps: S1′. The roving is drawn into the short fiber sliver by the short fiber feeding unit and fed into the calculus core wrapping unit. The core filament is fed into the calculus core wrapping unit through the steady-state feeding unit. S2′. The core yarn and the short fiber sliver are fed into the front nip formed by the engagement of the front roller and the front skin roller at a distance of 2-5mm, and output to the mesh ring through the front nip; the short fiber sliver is evenly spread on the mesh ring with a certain width and fiber parallelism under the cooperation of the negative pressure suction mechanism and the negative pressure airflow guiding component; the rotation of the core yarn drives the short fiber sliver to wrap around the core yarn in the core wrapping area in sequence to the outer layer of the core yarn, forming a core yarn; S3′. The core yarn is transmitted to the core yarn winding unit for twisting and winding via the softening integral yarn guiding unit.

9. An application of the core-spinning method based on the principle of calculus as described in claim 8, characterized in that, The prepared core yarn is applied to clothing, fire blankets and ropes in the fire protection field; casual wear, sportswear, curtains and bed sheets in the clothing and home furnishing field; tents, clothing and shoes in the military field; and automotive interior fabrics, aerospace seat covers, high-speed rail seat covers and aviation thermal blankets in the transportation field.

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