Device for knitting adjustable double-helix fiber array by crochet hook
By using a crochet weaving device, the rotation and movement of carbon fibers are precisely controlled through a crochet hook and slide rail system, solving the problems of generating a double-helix structure and growth density, and improving the stability and consistency of the wave absorption performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-04-07
AI Technical Summary
Existing technologies make it difficult to accurately generate carbon fibers with a double-helix structure and control their growth density, which affects their microwave absorption performance.
Using a crochet knitting device, a system of crochet hooks, rotary motors, sliders and slide rails, combined with PDMS film and interlocking components, is used to enable the crochet hooks to move flexibly and rotate precisely in three-dimensional space, forming an adjustable double helix fiber array.
This technology enables the efficient and precise generation of double-helix carbon fiber structures, improving the stability and consistency of wave absorption performance and ensuring the continuity of the fiber structure and weaving efficiency.
Smart Images
Figure CN224092111U_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of controlling the growth of helical carbon nanofibers, specifically a device for weaving an adjustable double helical fiber array using a crochet hook. Background Technology
[0002] Helical carbon nanofibers possess excellent microwave absorption properties, and their structural morphology and growth density affect their microwave absorption and energy absorption. To achieve better microwave absorption performance, precise design and processing of the fiber structure are required. Research on carbon fiber array growth and the influence of carbon fiber growth density and structural morphology on microwave absorption performance has become a research hotspot.
[0003] Currently, there are many challenges in generating carbon fibers with specific morphologies and controlling their growth density using chemical vapor deposition (CVD). On the one hand, existing methods for growing carbon fibers struggle to precisely generate double-helix structures. On the other hand, controlling the growth density during carbon fiber growth is difficult. Therefore, developing a device and method capable of efficiently and precisely weaving double-helix carbon fiber structures with high flexibility and controllability is a way to efficiently find the optimal combination of microwave absorption properties. Thus, those skilled in the art provide a device for weaving an adjustable double-helix fiber array using a crochet hook to solve the problems mentioned in the background. Utility Model Content
[0004] The purpose of this invention is to provide a device for weaving an adjustable double-helix fiber array using a crochet hook, in order to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A device for weaving an adjustable double-helix fiber array using a crochet hook includes a crochet hook for extracting carbon fibers, a rotary motor for driving the crochet hook, slider A, slide rail A, slide rail B, slider B, slide rail C, and slider C for realizing multi-directional movement of the crochet hook, and control motors A, B, and C for controlling them, as well as a tongue-and-groove interlocking assembly for fixing a PDMS film. Motor C is mounted on the rear side inside the housing, slide rail C is fixedly disposed at the bottom inside the housing, the rotary motor is fixed inside the housing, and control motor B is disposed at the right end inside the housing.
[0007] As a further embodiment of this utility model: a slide rail C in the x-axis direction is firmly fixed to the outer shell, an "L"-shaped slider C is installed, a slide rail B in the y-axis direction is installed on the "L"-shaped slider C, and a slide rail A in the z-axis direction is installed on the slider B of the y-axis slide rail B; a slider A is provided on the slide rail A.
[0008] As a further embodiment of this utility model: the hook is fixedly connected to the corresponding rotary motor, and the rotary motor with the hook installed is arranged on the slider A of the z-axis slide rail A in a regular manner to form a mutually perpendicular "+" layout; the recessed part of the concave-convex interlocking component is fixed on both sides of the device housing, the PDMS film is smoothly pressed into the recessed area, and then the protruding part is tightly attached to the recessed area.
[0009] Compared with the prior art, the beneficial effects of this utility model are:
[0010] 1. The hook diameter is set at 1-2 micrometers, an extremely fine specification that ensures precise hooking of carbon fiber. Each hook is equipped with an independent rotary motor, allowing individual control of the rotation direction. This design transforms the carbon fiber from a single helix to a double helix structure. By precisely adjusting the rotation angle, it is ensured that the fiber forms an ideal helical shape when the hook pulls the carbon fiber; while precise control of the reset time guarantees the continuity and stability of each knitting action, helping to improve knitting efficiency and fiber structure consistency.
[0011] 2. The z-axis slide rail not only allows the crochet hook to detach from the fiber, but also works in conjunction with the x-axis and y-axis slide rails to complete the weaving of spiral fibers of different densities. Through the close cooperation of the three slide rails, the crochet hook can move flexibly in three-dimensional space to meet diverse weaving needs.
[0012] 3. PDMS membrane, or polydimethylsiloxane membrane, has the characteristics of low surface energy, good hydrophobicity and flatness, which can provide a stable adhesion base for helical fibers. At the same time, it has good chemical stability and will not react with chemical substances during the growth process, thus ensuring the stability of the growth environment. In addition, its flexibility and elasticity can buffer the stress generated by fiber growth and effectively avoid fiber breakage or abnormal growth.
[0013] 4. The interlocking components used to secure the PDMS film are made of acrylic. The protruding part of the component is 4 cm longer than the recessed part. This unique design greatly facilitates the pressing and removing of the PDMS film. During the weaving process, the PDMS film is firmly fixed to the component, providing reliable support for the hook to pass through the film and hook the carbon fibers. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of a device for weaving an adjustable double-helix fiber array using a crochet hook.
[0015] Figure 2 This is a top view of a device for weaving an adjustable double-helix fiber array using a crochet hook.
[0016] In the diagram: 1. Crochet hook; 2. Rotary motor; 3. Control motor A; 4. Slider A; 5. Slide rail A; 6. Slide rail B; 7. Control motor B; 8. Slider B; 9. Slide rail C; 10. Slider C; 11. PDMS film; 12. Interlocking assembly; 13. Motor C; 14. Housing. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0018] Please see Figures 1-2 In this embodiment of the invention, a device for weaving an adjustable double-helix fiber array using a crochet hook includes a crochet hook 1 for extracting carbon fibers, a rotary motor 2 for driving the crochet hook 1, a slider A4, a slide rail A5, a slide rail B6, a slider B8, a slide rail C9, a slider C10 for realizing multi-directional movement of the crochet hook, and control motors A3, B7, and C13 for controlling them, as well as a tongue-and-groove interlocking assembly 12 for fixing a PDMS film 11. The motor C13 is installed on the rear side inside the outer casing 14, the slide rail C9 is fixedly installed at the bottom inside the outer casing 14, the rotary motor 2 is fixed inside the outer casing 14, and the control motor B7 is installed at the right end inside the outer casing 14.
[0019] A slide rail C9 in the x-axis direction is firmly fixed to the outer casing 14. An L-shaped slider C10 is installed on the L-shaped slider C10. A slide rail B6 in the y-axis direction is installed on the L-shaped slider C10. A slide rail A5 in the z-axis direction is installed on the slider B8 of the y-axis slide rail B6. A slider A4 is provided on the slide rail A5.
[0020] The hook 1 is fixedly connected to the corresponding rotary motor 2. The rotary motors with the hook 1 installed are arranged on the slider A4 of the z-axis slide rail A5 according to the rules, forming a cross layout that is perpendicular to each other. The recessed part of the interlocking component 12 is fixed on both sides of the device housing 14. The PDMS film 11 is pressed smoothly into the recessed area, and then the protruding part is tightly attached to the recessed area.
[0021] Securely fix the x-axis slide rail C9 to the outer casing 14, and install the L-shaped slider C10, ensuring it slides smoothly on the slide rail. Install the y-axis slide rail B6 on the L-shaped slider C10, ensuring a secure installation and free movement of slider B8. Finally, install the z-axis slide rail A5 on slider B8 of the y-axis slide rail B6, completing the assembly of the entire slide rail and slider system.
[0022] Install the hook 1 and the motor. Select a hook 1 with a diameter of 1-2μm and fix it to the corresponding rotary motor 2 to ensure that the hook is installed firmly and will not wobble or shift under the drive of the motor. Arrange the rotary motors with hooks 1 installed on them regularly on the slider of the z-axis slide rail according to the design requirements, forming a mutually perpendicular "+" layout to ensure that each hook and its motor can work independently and normally.
[0023] The convex-concave interlocking assembly 12 is installed to fix the PDMS film 11. The PDMS film 11, made of acrylic with recessed parts on both sides of the device housing 14, is pressed smoothly into the recessed area, and then the protruding part is tightly attached to the recessed area to prepare for the subsequent weaving operation.
[0024] Before starting the device, the desired outcome must be programmed into the chip controlling the motors. The motors, connected to the three slide rails, are controlled by chips on three separate circuit boards. Through programming, the required instructions can be transmitted to the motors to achieve the desired spiral fiber array weaving. For example, when controlling the hook's movement, the motors can be precisely adjusted to move the slide rails, allowing for different movements of the hook in the x, y, and z axes, thus meeting the weaving requirements of different spiral fiber arrays, such as adjusting fiber density or changing the spiral structure.
[0025] During the weaving process, the first step is to hook carbon fiber using the needle. The device's control system is then activated, controlling the motor on the x-axis slide rail to slowly advance the hook along the x-axis. The hook passes through the PDMS membrane and precisely penetrates the sample containing carbon fiber. During the needle's advance, a program input into the circuit board connected to the motor ensures accurate arrival at the target position.
[0026] Once the hook reaches the predetermined depth and successfully hooks the carbon fiber, it enters the lifting and rotating stage to form a double helix. The motor on the x-axis slide rail is activated, causing the hook to return along its original path. Simultaneously, the rotary motor is controlled to drive the hook to rotate according to a pre-set rotation angle and speed. Under the combined action of lifting and rotation, the single-headed helical carbon fiber gradually forms a double helix. During this process, the horizontal position of the hook can be finely adjusted via the y-axis slide rail according to actual needs to ensure the uniformity and stability of the helical structure.
[0027] Once the carbon fiber forms the desired helical structure, it passes through the PDMS membrane. The Z-axis slide rail is then controlled to raise the hook, allowing it to easily detach from the fiber. At this point, the double-helical carbon fiber remains on the PDMS membrane. To weave a multi-headed helical structure, the rotation direction and movement of the hook can be adjusted, allowing for multiple hooking and weaving operations.
[0028] For the weaving of multiple rows of fibers, a controller for moving the PDMS membrane is used to move the position of the PDMS membrane according to a preset pattern or rule. After each movement, the above operations of needle insertion, lifting and rotation, and needle removal are repeated to achieve the orderly weaving of multiple rows of fibers and construct a complex fiber array structure.
[0029] If you need to weave fiber arrays of different densities, you can adjust them in two ways. One is to increase or decrease the number of hooks working simultaneously, for example, increasing from 5 hooks to 10 to increase the fiber density. The other is to increase the number of times the hooks work. For example, by repeatedly adjusting the movement of the y-axis and z-axis slides, you can change the spacing between each row or column of fibers, thereby increasing the fiber array density.
[0030] After weaving, the PDMS membrane with the helical carbon fiber array is carefully removed from the device, and the microwave absorption performance of the sample is comprehensively tested using professional microwave absorption performance testing equipment, such as a vector network analyzer. Detailed microwave absorption performance data for samples with different fiber densities, lengths, and helical structures are recorded.
[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A device for weaving an adjustable double-helix fiber array using a crochet hook, characterized in that, It includes a hook (1) for extracting carbon fibers, a rotary motor (2) for driving the hook (1), a slider A (4), a slide rail A (5), a slide rail B (6), a slider B (8), a slide rail C (9), a slider C (10) for realizing multi-directional movement of the hook, and control motors A (3), B (7), and C (13) for controlling them, as well as a concave-convex interlocking assembly (12) for fixing the PDMS film (11); the concave part of the concave-convex interlocking assembly (12) is fixed on both sides of the device housing (14), the PDMS film (11) is smoothly pressed into the concave part, and then the protruding part is tightly attached to the concave part; A motor C (13) is installed inside the rear side of the outer shell (14), a slide rail C (9) is fixedly installed at the bottom inside the outer shell (14), the rotary motor (2) is fixed inside the outer shell (14), and a control motor B (7) is installed at the right end inside the outer shell (14).
2. The apparatus for weaving an adjustable double-helix fiber array using a crochet hook according to claim 1, characterized in that, The slide rail C (9) in the x-axis direction is firmly fixed on the outer shell (14), and the "L"-shaped slider C (10) is installed. The slide rail B (6) in the y-axis direction is installed on the "L"-shaped slider C (10), and the slide rail A (5) in the z-axis direction is installed on the slider B (8) of the y-axis slide rail B (6).
3. The apparatus for weaving an adjustable double-helix fiber array using a crochet hook according to claim 2, characterized in that, The slide rail A (5) is provided with a slider A (4).
4. The apparatus for weaving an adjustable double-helix fiber array using a crochet hook according to claim 1, characterized in that, The hook (1) is fixedly connected to the corresponding rotary motor (2). The rotary motor with the hook (1) installed is arranged on the slider A (4) of the z-axis slide rail A (5) according to the rules, forming a cross layout that is perpendicular to each other.