Carbon fiber unwinding mechanism

Abstract

The application relates to a carbon fiber unwinding mechanism, which comprises a pay-off roller for placing a carbon fiber roll, the pay-off roller being rotationally arranged on a support frame, a guide wheel being further rotationally arranged on the support frame, the guide wheel being arranged above the pay-off roller, the rotation shaft of the guide wheel being perpendicular to the rotation shaft of the pay-off roller, and the rotation direction of the guide wheel and the pay-off direction of the carbon fiber wire being located in the same plane; a winding box for accommodating the carbon fiber wire being arranged on the side surface of the pay-off roller; a guide assembly and a driving assembly being arranged between the guide wheel and the winding box, the carbon fiber wire being guided to the winding box through the guide assembly, and the driving assembly being arranged between the guide assembly and the winding box and pulling the carbon fiber wire. The transverse shearing force borne by the carbon fiber wire is reduced, the carbon fiber wire is prevented from being cracked or fuzzed, and compared with traditional carbon fiber unwinding equipment, the application has smaller floor space and lower energy consumption.

Description

Technical Field

[0001] This application relates to the technical field of carbon fiber processing, and in particular to a carbon fiber unwinding mechanism. Background Technology

[0002] In industrial production, carbon fiber filaments are often wound spirally onto rollers to form carbon fiber rolls. Before use, the carbon fiber filaments usually need to be removed from the rolls and stacked. During the unwinding process, guided by the winding method of the carbon fiber filaments, they continuously sway left and right along the roller axis. During this swaying, there is axial friction between the carbon fiber filaments and the guide rollers, causing the carbon fiber filaments to be subjected to lateral shearing forces during unwinding. Because carbon fiber filaments are brittle, have low toughness, and have weak bonding between individual filaments, the lateral force during the friction between the carbon fiber filaments and the guide rollers can easily cause individual filaments to break, resulting in cracking or fuzzing of the carbon fiber filaments.

[0003] In response, patent application number CN202110570594.X discloses a carbon fiber unwinding device with correction and limiting functions. The entire carbon fiber roll is set on a sliding module. During the unwinding process, the sliding module drives the entire carbon fiber roll to move back and forth laterally. The continuous displacement of the rollers counteracts the lateral movement of the carbon fiber filaments, making the filament exit position relatively fixed and avoiding relative friction between the carbon fiber filaments and the guide rod.

[0004] Although the above solution solves the problem of carbon fiber filaments cracking or fuzzing during unwinding, it requires an additional sliding module, which occupies a large area; and the sliding module works continuously during the unwinding process, which increases the energy consumption of the entire device.

[0005] Therefore, there is an urgent need for a carbon fiber unwinding mechanism that can solve the problems of cracking and burring during the unwinding process of carbon fiber rolls, while also being energy-efficient and having a small footprint. Utility Model Content

[0006] To address the issues of high energy consumption and large footprint of existing carbon fiber dewinding mechanisms, this application provides a carbon fiber dewinding mechanism.

[0007] This application provides a carbon fiber unwinding mechanism, which adopts the following technical solution:

[0008] The device includes a pay-off roller for holding carbon fiber coils, the pay-off roller being rotatably mounted on a support frame, and a guide wheel being rotatably mounted on the support frame. The guide wheel is positioned above the pay-off roller, and the axis of rotation of the guide wheel is perpendicular to the axis of rotation of the pay-off roller, with the rotation direction of the guide wheel and the pay-off direction of the carbon fiber filaments lying in the same plane. A take-up box for storing carbon fiber filaments is placed on the side of the pay-off roller. A guide assembly and a drive assembly are provided between the guide wheel and the take-up box. The guide assembly guides the carbon fiber filaments to the take-up box, and the drive assembly is located between the guide assembly and the take-up box and pulls the carbon fiber filaments.

[0009] By adopting the above technical solution, even if the carbon fiber filament moves back and forth along the axis of the unwinding roller during the unwinding process, it only changes the contact position of the carbon fiber filament on the rim of the guide wheel. The direction of unwinding and the rotation direction of the guide wheel are on the same plane. During the unwinding process, the carbon fiber filament will not experience lateral friction with the guide wheel, reducing the lateral shear force on the carbon fiber filament and preventing cracking or fuzzing. Compared with the current conventional technical solution, it is not necessary to continuously move the position of the unwinding roller during the unwinding process, saving energy.

[0010] Furthermore, the overall structure of this application is a top-bottom structure, which occupies a small area, saves space, and facilitates the inspection of carbon fiber filaments. In practice, if the take-up box is too close to the unwinding roller, the released carbon fiber filaments are prone to entanglement with the unwinding roller. By adopting the above technical solution, the carbon fiber filaments fall into the take-up box next to the unwinding roller after being guided by the guide component, which can prevent the downward carbon fiber filaments from being too close to the unwinding roller and causing entanglement.

[0011] Preferably, the guiding assembly includes a first guide roller rotatably connected to the support frame, the first guide roller being disposed between the guide wheel and the winding box; the carbon fiber filament passes over the guide wheel and then passes over the first guide roller, before falling downward into the winding box.

[0012] When the guide roller is tilted, the carbon fiber filaments will also be tilted after passing through the guide roller, which is not conducive to subsequent processing. By adopting the above technical solution and setting a first guide roller, the tilt of the carbon fiber filaments can be smoothed out after passing through the first guide roller downwards, improving the conveying stability and straightness.

[0013] Preferably, the guiding assembly further includes a second guide roller mounted on the support frame, the second guide roller being disposed below the first guide roller; one end of the second guide roller near the unwinding roller is rotatably disposed on the support frame, and the other end away from the unwinding roller is inclined toward the first guide roller, so that the axis of rotation of the second guide roller is perpendicular to the falling direction of the carbon fiber filament.

[0014] By adopting the above technical solution, the rotation axis of the second guide roller is perpendicular to the downward movement trajectory of the carbon fiber filament, preventing the second guide roller from exerting lateral force on the carbon fiber filament. Specifically, since the take-up box is located on the side of the unwind roller, the path of the carbon fiber filament from the guide roller to the take-up box is inclined. If the second guide roller is set horizontally, the angle between the guide roller and the carbon fiber filament will not be equal to 90°. Furthermore, due to the curved surface of the second guide roller, the carbon fiber filament tends to have lateral displacement when passing over the second guide roller, generating lateral force. After tilting the second guide roller, the central axis of the second guide roller is perpendicular to the movement trajectory of the carbon fiber filament, thus avoiding lateral force on the carbon fiber filament.

[0015] Preferably, the driving assembly includes a driving roller and a supporting surface, the carbon fiber filament passes between the driving roller and the supporting surface, the driving roller abuts against the supporting surface, and the carbon fiber filament is pulled by friction.

[0016] By adopting the above technical solution, the carbon fiber filaments are unwound by the friction between the drive roller and the carbon fiber filaments.

[0017] Preferably, the guide wheel is a double-layered concentric ring structure, including an outer ring and an inner ring. The inner side of the outer ring is rotatably connected to the outer side of the inner ring. The outer ring is circular and can rotate around the inner ring. The carbon fiber filament passes around the outer side of the outer ring. The inner ring is disposed above the pay-off roller through a rotating assembly, so that while the outer ring rotates around the inner ring, the inner ring can also swing through the rotating assembly. The axis of rotation of the inner ring is parallel to the axis of rotation of the pay-off roller.

[0018] By adopting the above technical solution, a double-layered ring-shaped guide wheel is installed, allowing the guide wheel to not only rotate but also tilt at a certain angle. Even if the guide wheel is not positioned directly above the take-up roller, tilting it can make the fiber filament exit direction tangent to the rim of the guide wheel, ensuring that the rotation direction of the guide wheel and the fiber filament unwinding direction are on the same plane. Furthermore, the tilting of the inner ring of the guide wheel allows the entire assembly to better accommodate carbon fiber rolls of varying widths.

[0019] Preferably, the rotating assembly includes a mounting hole and a crossbar. The mounting hole is located above the feed roller. The crossbar is inserted into the mounting hole and can rotate within the mounting hole. The axis of rotation of the crossbar is parallel to the axis of rotation of the feed roller. The end of the crossbar is fixed to the inner side of the inner ring, so that the inner ring rotates synchronously with the crossbar.

[0020] By adopting the above technical solution, the rotation of the inner ring can be achieved through the cooperation of the mounting hole and the crossbar, resulting in a simple structure.

[0021] Preferably, the guide wheel is equipped with a speed sensor.

[0022] By adopting the above technical solution, the number of rotations of the disengaged guide wheel is detected by the speed sensor, thereby detecting the length of the carbon fiber filament.

[0023] Preferably, the guide wheel has an annular groove at its rim to accommodate the carbon fiber filaments.

[0024] The above technical solution is used to limit the carbon fiber filaments and prevent them from detaching from the guide wheel.

[0025] Preferably, a stop block is provided below the guide wheel, and the stop block has a notch. The stop block is U-shaped, and the two sides of the notch are opposite to the two sides of the guide wheel. The carbon fiber filament first passes through the notch of the stop block and then winds around the guide wheel.

[0026] By adopting the above technical solution, since the carbon fiber filament passes through the notch, the position of the carbon fiber filament is restricted on both sides of the notch of the stop block. Moreover, the width of the notch is smaller than the width of the guide wheel rim, making it difficult for the carbon fiber filament to detach from the guide wheel.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. Reduces friction between carbon fiber filaments and guide rollers during unwinding, preventing cracking and burrs in the carbon fiber filaments; adopts an upper and lower structure, saving floor space and facilitating the observation of carbon fiber filament quality; eliminates the need for additional drive components to drive the displacement of the pay-off rollers, resulting in low energy consumption.

[0029] 2. The carbon fiber filaments are guided by an inclined second guide roller to prevent them from being subjected to lateral forces;

[0030] 3. The guide wheel can deflect at a certain angle while rotating, so that it can adapt to the continuously decreasing diameter of the carbon fiber roll during the unwinding process. Attached Figure Description

[0031] Figure 1 This is a perspective view from one angle in an embodiment of this application;

[0032] Figure 2 This is a perspective view from another angle in the embodiments of this application;

[0033] Figure 3 This is a front view of an embodiment of this application;

[0034] Figure 4 This is the right view in the embodiments of this application;

[0035] Figure 5 From Figure 4 A three-dimensional view of the section at position AA;

[0036] Figure 6 This is an exploded view of the internal structure of the guide wheel, which is the main feature of this application embodiment.

[0037] Reference numerals: 1. First mounting plate; 11. Pay-off roller; 2. Second mounting plate; 21. Guide rod; 22. Mounting frame; 3. Guide wheel; 31. Outer ring; 32. Inner ring; 33. Mounting hole; 34. Crossbar; 35. Gap; 36. Mounting rod; 4. Second guide roller; 5. First guide roller; 6. Stop block; 7. Rewinding box; 8. Carbon fiber filament; 9. Speed ​​sensor; 10. Drive roller; 101. Support surface. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1 -Appendix Figure 6 This application will be described in further detail.

[0039] This application discloses a carbon fiber dewinding device.

[0040] Reference Figure 1 and 2 This application discloses a carbon fiber unwinding device, including a support frame, a feed roller 11 rotatably mounted on the support frame, and a guide wheel 3 rotatably mounted on the support frame, positioned above the feed roller 11. A take-up box 7 for collecting carbon fiber filaments 8 is placed on the side of the feed roller 11. A drive assembly for pulling the carbon fiber filaments 8 is also provided between the guide wheel 3 and the take-up box 7, and a guide assembly for guiding the carbon fiber filaments 8 is provided between the drive assembly and the guide wheel 3. Under the pull of the drive assembly, the carbon fiber filaments 8 move upward from the feed roller 11, around the guide wheel 3, and then, guided by the guide assembly, pass through the drive assembly and fall into the take-up box 7. The lateral force experienced by the carbon fiber filaments 8 during the guidance process by the guide wheel 3 and the guide assembly is small, making it less prone to cracking and burrs. The feed roller 11 does not need to move during the unwinding process, thus saving energy. Furthermore, due to the guidance of the guide assembly, the overall structure of this application embodiment is a vertical structure, occupying a small area.

[0041] Reference Figure 1 and 2The support frame includes a vertically arranged first mounting plate 1 and a second mounting plate 2. A mounting bracket 22 is fixed to the top of the first mounting plate 1, and a guide rod 21 is laid on the top of the mounting bracket 22. The direction of the guide rod 21 is perpendicular to the first mounting plate 1. The second mounting plate 2 is entirely mounted on the guide rod 21. The pay-off roller 11 and the drive assembly are disposed on the first mounting plate 1, and the second mounting plate 2 is located above the pay-off roller 11. The guide wheel 3 and the guide assembly are disposed on the second mounting plate 2. A speed sensor 9 is disposed on the guide wheel 3 and is fixed to the second mounting plate 2. The speed sensor 9 detects the number of rotations of the guide wheel 3, and thus detects the length of the carbon fiber filament 8. In this embodiment, reflective areas are alternately arranged on the side of the guide wheel 3, and the speed sensor 9 uses the principle of light reflection to achieve non-contact counting.

[0042] Reference Figure 2 and 3 The axis of rotation of guide wheel 3 is perpendicular to the axis of rotation of unwinding roller 11, and the rotation direction of guide wheel 3 is on the same plane as the unwinding direction of carbon fiber filament 8. The guiding assembly includes a first guide roller 5 and a second guide roller 4. The first guide roller 5 is disposed between guide wheel 3 and winding box 7, and is located behind guide wheel 3. The height of its upper end is flush with the upper end of the rim of guide wheel 3. The diameter of the first guide roller 5 is larger than that of guide wheel 3, which can improve conveying stability and straightness. The second guide roller 4 is disposed below the first guide roller 5. The end of the second guide roller 4 near unwinding roller 11 is rotatably mounted on the support frame, and the end away from unwinding roller 11 is inclined toward the first guide roller 5. The angle of inclination is related to the setting position of the first guide roller 5 and the drive assembly, so that the axis of rotation of the second guide roller 4 is perpendicular to the falling direction of carbon fiber filament 8. After passing over guide wheel 3, carbon fiber filament 8 passes over the first guide roller 5, then passes downward through the second guide roller 4, and then passes downward through the drive assembly.

[0043] Reference Figure 2 and 3The driving assembly includes a driving roller 10 and a smooth support surface 101. Carbon fiber filaments 8 pass between the driving roller 10 and the support surface 101. The driving roller 10 abuts against the support surface 101, pressing against each other and pulling the carbon fiber filaments 8 through friction. The driving roller 10 is driven to rotate by a motor mounted on a first mounting plate 1. In this embodiment, the support surface 101 is a smooth plane, parallel to the downward displacement direction of the carbon fiber filaments 8, and the surface of the driving roller 10 is rough to provide sufficient friction. Additionally, the clamping action of the driving roller 10 and the support surface 101 also limits the movement of the carbon fiber filaments 8, allowing them to fall smoothly into the winding box 7. In some embodiments, unlike this embodiment, the driving assembly includes a driving roller 10 and a driven roller. The carbon fiber filaments 8 pass between the driving roller 10 and the driven roller, with the driving roller 10 abutting against the driven roller, pressing against each other and pulling the carbon fiber filaments 8 through friction. A stop block 6 is provided below the guide wheel 3. The stop block 6 has a notch, which is U-shaped, and the two sides of the notch are opposite to the two sides of the guide wheel 3. The carbon fiber filament 8 first passes through the notch of the stop block 6 and then winds onto the guide wheel 3. The width of the notch is smaller than the width of the rim of the guide wheel 3. Even if the carbon fiber filament 8 swings left and right, the left and right position of the carbon fiber filament 8 passing through the notch of the stop block 6 is limited by the stop block 6, and it will not fall off the guide wheel 3. The rim of the guide wheel 3 is provided with an annular groove to accommodate the carbon fiber filament 8.

[0044] Reference Figure 5 and 6 In this embodiment, the guide wheel 3 is a double-layered concentric ring structure. The structure of the guide wheel 3 is similar to that of a bearing. The guide wheel 3 includes an inner ring 32 and an outer ring 31. The inner ring 32 and the outer ring 31 are rotatably connected to a bearing seat via a shaft. The inner side of the outer ring 31 is rotatably connected to the outer side of the inner ring 32. The outer ring 31 is circular and can rotate around the inner ring 32. The carbon fiber filament 8 passes around the outer side of the outer ring 31. The inner ring 32 is mounted on the second mounting plate 2 via a rotating assembly, which allows the inner ring 32 to rotate... Figure 5 The inner ring 32 oscillates in the direction shown, and the axis of rotation of the inner ring 32 is parallel to the axis of rotation of the pay-off roller 11. While the outer ring 31 rotates around, the inner ring 32 can also oscillate through the rotating assembly.

[0045] Reference Figure 5 and 6In this embodiment, the rotating assembly includes a mounting rod 36, a mounting hole 33, and a crossbar 34. One end of the mounting rod 36 is fixed to the second mounting plate 2, and the mounting hole 33 is opened at the other end of the mounting rod 36. The crossbar 34 is inserted into the mounting hole 33 and can rotate within the mounting hole 33. The axis of rotation of the crossbar 34 is parallel to the axis of rotation of the feed roller 11. The end of the crossbar 34 is fixed to the inner side of the inner ring 32, so that the inner ring 32 follows the crossbar 34 and rotates around the central axis of the crossbar 34. Furthermore, a gap 35 is left between the upper and lower sides of the mounting rod 36 and the upper and lower inner sides of the inner ring 32. The gap 35 provides space for the guide wheel 3 to swing, allowing the inner ring 32 to achieve... Figure 5 The deflection is shown in the direction shown.

[0046] The implementation principle of this embodiment is as follows: During the unwinding process, the carbon fiber roll is first installed on the unwinding roller 11. The carbon fiber filament 8 passes upward through the notch of the stop block 6, and then passes over the guide wheel 3 from above. Since the rotation axis of the guide wheel 3 is perpendicular to the rotation axis of the unwinding roller 11, the carbon fiber filament 8 is less prone to lateral friction during the unwinding process. Then, the carbon fiber filament 8 passes over the top of the first guide roller 5, and then downward from the side of the first guide roller 5, resting on the side of the second guide roller 4. Guided by the second guide roller 4, which is perpendicular to the downward movement direction of the carbon fiber filament 8, the lateral force on the carbon fiber filament 8 is small, making it less prone to burrs. After passing downward through the second guide roller 4, the carbon fiber filament 8 enters between the drive roller 10 and the support surface 101, and falls under the pulling force of the drive roller 10, finally entering the take-up box 7. The overall space occupied is small, there is no need to move the unwinding roller 11 during the unwinding process, and energy consumption is low.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A carbon fiber unwinding mechanism, comprising a pay-off roller (11) for holding a carbon fiber roll, characterized in that: The wire feeding roller (11) is rotatably mounted on the support frame, and a guide wheel (3) is also rotatably mounted on the support frame. The guide wheel (3) is positioned above the wire feeding roller (11), and the axis of rotation of the guide wheel (3) is perpendicular to the axis of rotation of the wire feeding roller (11). The rotation direction of the guide wheel (3) is on the same plane as the wire feeding direction of the carbon fiber filament (8). The side of the pay-off roller (11) is provided with a take-up box (7) for storing the carbon fiber filament (8); A guide assembly and a drive assembly are provided between the guide wheel (3) and the winding box (7). The guide assembly guides the carbon fiber filament (8) to the winding box (7), and the drive assembly is located between the guide assembly and the winding box (7) to pull the carbon fiber filament (8).

2. The carbon fiber unwinding mechanism according to claim 1, characterized in that: The guiding assembly includes a first guide roller (5) rotatably connected to the support frame, the first guide roller (5) being disposed between the guide wheel (3) and the winding box (7); The carbon fiber filament (8) passes over the guide wheel (3) and then passes over the first guide roller (5) before falling downward into the winding box (7).

3. The carbon fiber unwinding mechanism according to claim 2, characterized in that: The guiding assembly further includes a second guide roller (4) disposed on the support frame, the second guide roller (4) being disposed below the first guide roller (5); The second guide roller (4) is rotatably mounted on the support frame at one end near the wire feeding roller (11), and at the other end away from the wire feeding roller (11) inclined upward toward the first guide roller (5), and the axis of the second guide roller (4) is perpendicular to the falling direction of the carbon fiber filament (8).

4. The carbon fiber unwinding mechanism according to claim 1, characterized in that: The drive assembly includes a drive roller (10) and a support surface (101). The carbon fiber filament (8) passes between the drive roller (10) and the support surface (101). The drive roller (10) abuts against the support surface (101), and they press against each other and pull the carbon fiber filament (8) by friction.

5. The carbon fiber unwinding mechanism according to claim 1, characterized in that: The guide wheel (3) includes an outer ring (31) and an inner ring (32) arranged in a double-layered concentric ring structure. The inner side of the outer ring (31) is rotatably connected to the outer side of the inner ring (32). The outer ring (31) is circular and can rotate around the inner ring (32). The carbon fiber filament (8) passes around the outer side of the outer ring (31). The inner ring (32) is positioned above the wire feeding roller (11) via a rotating assembly, so that while the outer ring (31) rotates around the inner ring (32), the inner ring (32) can also swing via the rotating assembly, and the axis of rotation of the inner ring (32) is parallel to the axis of rotation of the wire feeding roller (11).

6. A carbon fiber unwinding mechanism according to claim 5, characterized in that: The rotating assembly includes a mounting rod (36) and a crossbar (34). The mounting rod (36) is positioned above the wire feeding roller (11). One end of the mounting rod (36) is mounted on the support frame, and the other end is provided with a mounting hole (33). The crossbar (34) is inserted into the mounting hole (33) and can rotate within the mounting hole (33). The axis of rotation of the crossbar (34) is parallel to the axis of rotation of the wire feeding roller (11). The end of the crossbar (34) is fixed to the inner side of the inner ring (32), so that the inner ring (32) rotates synchronously with the crossbar (34).

7. The carbon fiber unwinding mechanism according to claim 1, characterized in that: The guide wheel (3) is equipped with a speed sensor (9) to detect the length of the detached carbon fiber filament (8).

8. The carbon fiber unwinding mechanism according to claim 1, characterized in that: The outer rim of the guide wheel (3) is provided with an annular groove for accommodating the carbon fiber filament (8).

9. A carbon fiber unwinding mechanism according to claim 1, characterized in that: A stop block (6) is provided below the guide wheel (3). The stop block (6) has a notch, and the two sides of the notch are opposite to the two sides of the guide wheel (3). The carbon fiber filament (8) first passes through the notch of the stop block (6) and then wraps around the guide wheel (3).

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