A constant yarn feeding device for a polar fabric

Abstract

The application discloses a kind of polar fabric quantitative yarn feeding device.The device includes support creel, yarn drum, yarn conveying mechanism, mechanical slide, yarn conveying mechanism, pneumatic yarn guide device and rotary device.Suspension arm is connected above support frame, and yarn drum is installed on the other side;Yarn conveying mechanism and mechanical slide are respectively installed on suspension arm.Mechanical slide includes slide bracket, sliding shaft and slide motor, and the bracket is driven to slide along the shaft by motor, and the position of circumferential yarn along the radial direction is controlled.Yarn conveying mechanism includes servo motor, servo motor support, coupling, yarn feeding wheel and yarn feeding tube bracket, and the number of rotation is adjusted by servo motor to drive yarn feeding wheel, and progressive quantitative yarn feeding is realized.Pneumatic yarn guide device continuously outputs internal yarn by external air flow and introduces to weaving position.Rotary device drives the whole device to rotate along central axis, and the position of circumferential yarn along the circumferential direction is controlled.The application realizes multiple quantitative yarn feeding of polar fabric circumferential yarn by cooperation of multiple components, ensures smooth yarn conveying, and significantly improves the weaving production efficiency of polar fabric.

Description

Technical Field

[0001] This invention relates to a quantitative yarn feeding device for polar fabrics, belonging to the technical field of polar fabric weaving equipment. Background Technology

[0002] Polar braided composite materials are a new type of material developed in the 1990s. These composites use polar fabrics as fiber reinforcements, combined with a specific matrix material. The polar fabrics are approximately circular in appearance, and their weave structure includes two systems of yarns: radial yarns and circumferential yarns. These two systems of yarns are arranged along the radial and circumferential directions of the fabric, respectively. Because the fibers in the polar fabric are oriented both circumferentially and radially, the polar fabric achieves high rotational load bearing capacity in the circumferential direction. Composite materials formed from planar polar fabrics are widely used in aero-engine rotor components and flywheel energy storage components, effectively improving the performance of rotating parts.

[0003] In the weaving process of polar fabrics, the circumferential yarns are introduced into the knitting structure in a continuous Archimedean spiral. The yarn feeding positions are also distributed along an Archimedean spiral, requiring simultaneous control of the yarn guide nozzles of the yarn feeding device in both the circumferential and radial directions. Furthermore, after introducing one round of circumferential yarn, it is necessary to wait for the radial and circumferential yarns to complete one round of weaving before introducing the next round of circumferential yarn. This makes the yarn feeding of polar fabrics a multi-incremental feeding process. While feeding yarn multiple times, the amount of yarn fed by the mechanism increases with each round. The yarn feeding process requires quantitative yarn feeding for each round and control of yarn tension during the feeding process. Currently, the circumferential yarn feeding of polar fabrics relies entirely on manual labor, which results in high labor costs, complex processes, and difficulty in mass production, leading to low production efficiency. However, during the yarn feeding process, precise control of the amount of yarn fed in each round is needed to ensure smooth yarn delivery while controlling yarn tension. Currently, there is no quantitative yarn feeding device specifically designed for this type of polar fabric. To address this problem, we propose a quantitative yarn feeding device for polar fabrics. Summary of the Invention

[0004] The purpose of this invention is to provide a quantitative yarn feeding device for polar fabrics, achieving incremental automated yarn feeding of polar fabrics while controlling system operation. This avoids uneven yarn tension, uneven yarn distribution, and yarn loosening from affecting the uniformity of fabric density and the quality of the finished product. It fulfills the aforementioned requirements of the prior art for quantitative yarn feeding weaving equipment for polar fabrics, further improving the automation of polar weaving equipment.

[0005] In response to the shortcomings of existing technologies,

[0006] The purpose of this invention is to provide a quantitative yarn feeding device for polar fabrics. The device includes a yarn support frame, a yarn bobbin, a yarn transfer mechanism, a mechanical slide, a yarn conveying mechanism, a pneumatic yarn guiding device, and a rotary device.

[0007] The yarn support frame includes a support frame and a cantilever rod. The cantilever rod is connected to the top of the support frame, and a yarn bobbin is installed on the other side. A yarn transfer mechanism is installed on the side of the cantilever rod near the yarn bobbin, and a mechanical slide is installed on the other side.

[0008] The mechanical slide is driven by a motor and includes a slide plate, a sliding shaft, and a slide motor. The sliding shaft is connected to the yarn conveying mechanism through the slide plate. The slide motor is installed on one side of the sliding shaft and is used to drive the slide plate to slide back and forth along the sliding shaft during the weaving process to control the yarn feeding position of the circumferential yarn of the polar fabric along the radial direction of the polar coordinate.

[0009] The yarn conveying mechanism is connected to the pneumatic yarn guide device and is located on a mechanical slide, moving back and forth with the slide. The yarn conveying mechanism includes a servo motor, a servo motor bracket, a coupling, a yarn feed roller, and a yarn feed tube frame. The servo motor is mounted on the servo motor bracket, and its outer shaft is connected to the yarn feed roller. One end of the yarn feed roller is connected to the servo motor via a coupling, and the other end is connected to the fixed pneumatic yarn guide device via the yarn feed tube frame. The yarn feed amount is controlled by the servo motor. The yarn feed amount controlled by the servo motor is calculated as follows: L1 is the length of the first loop, E is the yarn arrangement density of the circumferential yarn in the polar fabric, and N is the length of the Nth loop (where N is a positive integer). Yarn feed length = buckling coefficient × length of each loop. Wherein, the buckling coefficient is an empirical coefficient that represents the degree of yarn buckling, generally taken as 1.1-1.3.

[0010] The servo motor drives the yarn feeding wheel and adjusts the number of rotations of the yarn feeding wheel, transmitting the rotational power and control signals of the servo motor to complete the gradual yarn feeding.

[0011] The pneumatic yarn guide device is installed below the yarn feeder via a yarn feeder frame. A yarn inlet is provided close to the yarn feeder and connected to the yarn fed by the yarn feeder. The inlet is connected to an airflow generator, which uses compressed air to push the yarn through the pneumatic yarn guide tube. The pneumatic yarn guide tube, through the airflow, pushes the yarn to the yarn guide nozzle and further introduces it into the weaving position.

[0012] The rotary device includes a rotary shaft and a connecting arm, which is connected to a cantilever rod, driving the entire device to rotate around the central axis of the rotary device. The rotary device rotates on its own axis, leading the connecting arm to pull the entire yarn feeding device to rotate, controlling the position of the circumferential yarn of the polar fabric along the circumferential direction in polar coordinates.

[0013] The beneficial effects of this invention are as follows: This invention relates to a quantitative yarn feeding device for circumferential yarns of polar fabrics. This quantitative yarn feeding device meets the multiple incremental yarn feeding requirements of polar fabrics. The feeding position of the circumferential yarns of the polar fabric along the radial direction and the circumferential direction in polar coordinates is controlled by a mechanical slide table and a rotary device, respectively. This further controls the yarn feeding amount, meeting the multiple incremental yarn feeding requirements of circumferential yarns of polar fabrics. Simultaneously, pneumatic yarn feeding effectively completes the feeding of various high-performance yarns and solves the problem of automated yarn feeding for polar fabrics, improving the production efficiency of polar fabrics. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a quantitative yarn feeding device for polar fabrics.

[0015] Figure 2 A schematic diagram of the yarn conveying mechanism 5 of a quantitative yarn feeding device for polar fabrics.

[0016] Figure 3 A schematic diagram of the pneumatic yarn guide device 6 of a quantitative yarn feeding device for polar fabrics.

[0017] Figure 4 This is a schematic diagram of the polar fabric after final molding in Example 1. Detailed Implementation

[0018] Specific embodiments of the present invention are given below. These specific embodiments are only used to further illustrate the present invention in detail and do not limit the scope of protection of the claims of the present invention.

[0019] This invention provides a quantitative yarn feeding device for polar fabrics. The quantitative yarn feeding device includes a yarn support frame 1, a yarn bobbin 2, a yarn transfer mechanism 3, a mechanical slide table 4, a yarn conveying mechanism 5, a pneumatic yarn guiding device 6, and a rotary device 7.

[0020] like Figure 1 As shown, the yarn support frame 1 includes a support frame 101 and a cantilever rod 102. The cantilever rod 102 is connected to the upper part of the support frame 101, and the yarn bobbin 2 is installed on the other side. A yarn conveying mechanism 3 is installed on the side of the cantilever rod 102 near the yarn bobbin 2, and a mechanical slide table 4 is installed on the other side. The mechanical slide table 4 is driven by a motor, and the yarn conveying mechanism 5 is connected to a pneumatic yarn guiding device 6, both located on the mechanical slide table 4 and moving back and forth with the slide table. The pneumatic yarn guiding device 6 continuously outputs internal yarn through external airflow on the left side, further guiding it to the weaving position. The rotary device 7 includes a rotary shaft 701 and a connecting arm 702, which is connected to the cantilever rod 102. This drives the entire device to rotate along the central axis of the rotary device 7.

[0021] The yarn feeding mechanism 3 is installed on one side of the supporting yarn frame 1. The mechanism includes a yarn clamping plate 301, a yarn guide wheel 302, and a yarn breakage automatic stop device 303. The yarn clamping plate 301 and the yarn guide wheel 302 in the yarn feeding mechanism 3 are sequentially connected to the yarn fed from the yarn bobbin 2 below the mechanism. The yarn guide wheel 302 is mounted on its own mounting bracket, and its height is raised to adjust the yarn feeding angle. The yarn breakage automatic stop device 303 detects yarn breakage, completing the yarn feeding process.

[0022] The mechanical slide table 4 includes a slide table support plate 401, a sliding shaft 402, and a slide table motor 403. The sliding shaft 402 is connected to the yarn conveying mechanism 5 via the slide table support plate 401. The slide table motor 403 is mounted on one side of the sliding shaft 402 and is used to drive the slide table support plate 401 to slide back and forth along the sliding shaft 402 during the weaving process. It controls the yarn feeding position of the circumferential yarn of the polar fabric along the radial direction of the polar coordinate system.

[0023] like Figure 2 As shown, the yarn feeding mechanism 5 includes a servo motor 501, a servo motor bracket 502, a coupling 503, a yarn feeding roller 504, and a yarn feeding tube frame 505. The servo motor 501 is mounted on the servo motor bracket 502, and its outer shaft is connected to the yarn feeding roller 504. One end of the yarn feeding roller 504 is connected to the servo motor 501 via the coupling 503, and the other end is connected to a fixed pneumatic yarn guiding device 6 via the yarn feeding tube frame 505. The yarn feeding amount is controlled by the servo motor 501. The servo motor 501 drives the yarn feeding roller 504 and adjusts the number of rotations of the roller 504, transmitting the rotational power and control signals of the servo motor 501 to complete the gradual yarn feeding.

[0024] The yarn feed amount controlled by servo motor 501 is calculated as follows: L1 is the length of the first loop, E is the yarn arrangement density of the circumferential yarn of the polar fabric, and N is the length of the Nth loop. Final yarn feed length = buckling coefficient × length of each loop. Wherein, the buckling coefficient is an empirical coefficient that represents the degree of yarn buckling, and in this embodiment, it is taken as 1.3.

[0025] like Figure 3 As shown, the pneumatic yarn guide device 6 is installed below the yarn feeder 504 via a yarn feeder frame 505, and actively guides the yarn using compressed air. An air inlet 601 is located on the left side of the pneumatic yarn guide device 6, and a yarn inlet 602 is located close to the yarn feeder 504, connecting to the yarn fed by the yarn feeder 504. The air inlet 601 is connected to an airflow generator. Compressed air pushes the yarn through the pneumatic yarn guide tube 603, which, through airflow, pushes the yarn to the yarn guide nozzle 604, further guiding it into the weaving position. Simultaneously, the rotation of the rotary shaft 701 causes the connecting arm 702 to rotate, controlling the position of the circumferential yarn of the polar fabric along the circumferential direction in polar coordinates.

[0026] See Figure 4 The final shaped fabric in this embodiment is shown in the figure, with the dotted line indicating the conveyed yarn.

[0027] Any aspects not covered in this invention are applicable to existing technologies.

Claims

1. A quantitative yarn feeding device for polar fabrics, characterized in that, The device includes a yarn support frame (1), a yarn tube (2), a yarn transfer mechanism (3), a mechanical slide (4), a yarn conveying mechanism (5), a pneumatic yarn guide device (6), and a rotary device (7); the yarn support frame (1) includes a support frame (101) and a cantilever rod (102), the cantilever rod (102) is connected above the support frame (101), and the yarn tube (2) is installed on the other side; the yarn transfer mechanism (3) is installed on the side of the cantilever rod (102) near the yarn tube (2), and the mechanical slide (4) is installed on the other side; the mechanical slide (5) 4) Includes a slide plate (401), a sliding shaft (402), and a slide motor (403). The sliding shaft (402) is connected to the yarn feeding mechanism (5) via the slide plate (401). The slide motor (403) is installed on one side of the sliding shaft (402) and is used to drive the slide plate (401) to slide back and forth along the sliding shaft (402) during the weaving process to control the yarn feeding position of the circumferential yarn of the polar fabric along the radial direction of the polar coordinates. The yarn feeding mechanism (5) is connected to the pneumatic yarn guide device (6) and shares the same position. On the mechanical slide (4), the yarn conveying mechanism (5) includes a servo motor (501), a servo motor bracket (502), a coupling (503), a yarn feeding wheel (504), and a yarn feeding tube frame (505). The servo motor (501) is mounted on the servo motor bracket (502), and the outer shaft of the servo motor (501) is connected to the yarn feeding wheel (504). One end of the yarn feeding wheel (504) is connected to the servo motor (501) through the coupling (503), and the other end is connected to a fixed pneumatic conveyor through the yarn feeding tube frame (505). The yarn guide device (6) is connected and the yarn feeding amount is controlled by the servo motor (501). The servo motor (501) drives the yarn feeding wheel (504) and adjusts its rotation number to complete the progressive yarn feeding. The pneumatic yarn guide device (6) pushes the internal yarn to continuously output through the external airflow on the left and introduces it into the knitting position. The rotary device (7) includes a rotary shaft (701) and a connecting arm (702). The connecting arm (702) is connected to the cantilever rod (102) to drive the entire device to rotate along the central axis of the rotary device (7).

2. The quantitative yarn feeding device for polar fabrics according to claim 1, characterized in that... The yarn transfer mechanism (3) is installed on one side of the yarn support frame (1) and includes, from bottom to top, a yarn clamping plate (301), a yarn guide wheel (302), and a yarn breakage self-stop device (303).

3. The quantitative yarn feeding device for polar fabrics according to claim 2, characterized in that... The yarn clamping plate (301) and the yarn guide wheel (302) in the yarn transmission mechanism (3) are connected in sequence to the yarn transmitted from the yarn cylinder (2) below the mechanism. The yarn guide wheel (302) is installed and raised by its own mounting frame to adjust the yarn transmission angle. The yarn breakage is detected by the yarn breakage self-stop device (303) to complete the yarn transmission process.

4. The quantitative yarn feeding device for polar fabrics according to claim 1, characterized in that... The yarn feeding amount controlled by the servo motor (501) is calculated as follows: L1 is the length of the first loop, E is the yarn arrangement density of the circumferential yarn of the polar fabric, and N is the length of the Nth loop. The final yarn feed length = buckling coefficient × length of each loop, where the buckling coefficient is an empirical coefficient that represents the degree of yarn buckling, and is generally taken as 1.1-1.

3.

5. A quantitative yarn feeding device for polar fabrics according to claim 1, characterized in that... The pneumatic yarn guide device (6) is installed below the yarn feeder (504) via a yarn feeder frame (505) and is used to actively guide the yarn by means of compressed air flow.

6. The quantitative yarn feeding device for polar fabrics according to claim 1, characterized in that... The pneumatic yarn guide device (6) has an air inlet (601) on its left side and a yarn inlet (602) near the yarn feeder (504) to connect the yarn transmitted by the yarn feeder (504). The air inlet (601) is connected to an airflow generator, which pushes the yarn through the pneumatic yarn guide tube (603) by compressed air. The pneumatic yarn guide tube (603) pushes the yarn to the yarn guide nozzle (604) by the airflow and further introduces it into the weaving position.

7. A quantitative yarn feeding device for polar fabrics according to claim 1, characterized in that... The rotary device (7) rotates by rotating the rotary shaft (701), which in turn leads the connecting arm (702) to pull the entire yarn feeding device to rotate, thereby controlling the position of the circumferential yarn of the polar fabric along the circumferential direction of the polar coordinates.

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