Carbon fiber surface modification device

Abstract

The utility model provides a carbon fiber surface modification device, and belongs to the technical field of carbon fiber manufacturing. The carbon fiber surface modification device comprises a modification tank, a plurality of conveying rollers and a vibration compression roller, the modification tank is used for containing a working solution and is provided with a feeding side and a discharging side which are distributed at intervals in the first direction, and the first direction is perpendicular to the height direction of the modification tank; the multiple conveying rollers are distributed at intervals in the first direction and used for conveying carbon fibers in the first direction. The vibration compression rollers and the conveying rollers are distributed at intervals in the first direction, the bottoms of the vibration compression rollers are located in the modification tank and used for abutting against the carbon fibers so that the carbon fibers at the vibration compression rollers can be immersed in the working solution all the time, and the vibration compression rollers are configured to do reciprocating motion in the height direction of the modification tank so as to drive the carbon fibers to vibrate; the device can effectively solve the problem of poor carbon fiber surface modification effect.

Description

Technical Field

[0001] This application relates to the field of carbon fiber manufacturing technology, and more specifically, to a carbon fiber surface modification apparatus. Background Technology

[0002] Carbon fiber, with its superior properties such as high strength, high modulus, and low density, is widely used in aerospace, sporting goods, and automotive manufacturing. The interfacial bonding strength between carbon fiber and the resin matrix directly affects the final performance of carbon fiber-resin composites. Currently, surface oxidation modification is a common method to improve the interfacial bonding strength between carbon fiber and the resin matrix. Surface oxidation modification mainly includes anodic oxidation and liquid-phase oxidation, both of which require immersing the carbon fiber in a working solution. However, because the surface of carbon fiber is mainly composed of nonpolar bonds such as carbon-carbon bonds and carbon-hydrogen bonds, carbon fiber exhibits hydrophobicity in the working solution. This characteristic makes it easy for bubbles to form due to surface tension after the carbon fiber enters the working solution, resulting in insufficient and ineffective wetting of the carbon fiber surface, thus leading to poor surface modification results. Utility Model Content

[0003] The purpose of this application is to provide a carbon fiber surface modification device, which can effectively solve the problem of poor carbon fiber surface modification effect.

[0004] The embodiments of this application are implemented as follows:

[0005] This application provides a carbon fiber surface modification device, including a modification tank, multiple conveying rollers, and a vibrating pressure roller. The modification tank is used to contain a working fluid and has an inlet side and an outlet side spaced apart along a first direction, which is perpendicular to the height direction of the modification tank. The multiple conveying rollers are spaced apart along the first direction for conveying carbon fibers along the first direction. The vibrating pressure roller is spaced apart from the conveying rollers along the first direction, with its bottom located inside the modification tank and used to abut against the carbon fibers, so that the carbon fibers at the vibrating pressure roller are always immersed in the working fluid. The vibrating pressure roller is configured to reciprocate along the height direction of the modification tank to drive the carbon fibers to vibrate.

[0006] In the above technical solution, a vibrating roller is added to the carbon fiber surface modification device. Specifically, the vibrating roller and the conveying roller are distributed at intervals along the first direction. The bottom of the vibrating roller is located in the modification tank and is used to contact the carbon fiber, so that the carbon fiber at the vibrating roller is always immersed in the working fluid. The vibrating roller is configured to reciprocate along the height direction and drive the carbon fiber to vibrate. That is, the addition of the vibrating roller can make the carbon fiber vibrate during the conveying process. Firstly, the vibration of the carbon fiber can make the bubbles and impurities generated on the surface of the carbon fiber fall off the surface of the carbon fiber quickly, so that the entire surface of the carbon fiber can be fully contacted with the working fluid, thereby improving the surface modification effect of the carbon fiber. Secondly, the vibration of the carbon fiber can also create gaps between the filaments in the carbon fiber (carbon fiber is usually formed by many filaments winding together. During the vibration process, the carbon fiber is stretched, and gaps are easily generated between the filaments), so that the working fluid can penetrate the interior of the carbon fiber, which also helps to improve the surface modification effect of the carbon fiber.

[0007] In some alternative embodiments, the carbon fiber surface modification apparatus further includes a reciprocating linear drive, the power output end of which is connected to a vibrating roller to drive the vibrating roller to reciprocate along the height direction of the modification groove.

[0008] In the above technical solution, the carbon fiber surface modification device is equipped with a reciprocating linear drive component. Specifically, the power output end of the reciprocating linear drive component is connected to the vibrating roller to drive the vibrating roller to reciprocate along the height direction, which helps to increase the automation level of the vibrating roller and has the advantage of easy operation.

[0009] In some alternative embodiments, the vibratory roller includes a roller body and a frame, the frame being rotatably connected to both ends of the roller body along its axial direction, the frame being connected to the power output end of a reciprocating linear drive, the roller body and the conveying roller being spaced apart along a first direction, and the bottom of the roller body being located in a modification groove and used to abut against the carbon fiber.

[0010] In the above technical solution, the vibrating roller is configured to be a combination of roller body and frame. Specifically, the frame and the roller body are rotatably connected at both ends of the axial direction. The frame is connected to the power output end of the reciprocating linear drive. The roller body and the conveying roller are spaced apart along the first direction. The bottom of the roller body is located in the modification groove and is used to contact the carbon fiber. That is, the roller body can rotate under the drive of the carbon fiber during the carbon fiber conveying process, which helps to reduce the risk of carbon fiber being damaged by the vibrating roller during the conveying process.

[0011] In some alternative implementations, the path length of the reciprocating motion of the vibrating roller is 10–20 mm.

[0012] In the above technical solution, the path size of the reciprocating motion of the vibrating roller (i.e., the distance between the highest and lowest points of the bottom of the vibrating roller in the height direction of the modification groove) is limited to a suitable range, which can take into account the appropriate vibration intensity and prevent the carbon fiber from being overstretched (overstretching can easily damage the carbon fiber).

[0013] In some alternative embodiments, the carbon fiber surface modification apparatus further includes a circulation tank, the outlet of which is connected to the inlet of the modification tank, and the inlet of the circulation tank is connected to the outlet of the modification tank.

[0014] In the above technical solution, the carbon fiber surface modification device is equipped with a circulation tank. Specifically, the outlet of the circulation tank is connected to the inlet of the modification tank, and the inlet of the circulation tank is connected to the outlet of the modification tank. This can improve the uniformity of the concentration of the working liquid in the modification tank through the circulation of the working liquid, thereby improving the surface modification effect on the carbon fiber.

[0015] In some alternative implementations, the bottom wall of the modification tank is provided with two baffles located at both ends of the modification tank in the first direction to divide the modification tank into an inlet zone in the middle and an outlet zone on both sides of the inlet zone. The vibrating pressure roller is located in the inlet zone (i.e., the inlet zone is the area where the carbon fiber is surface modified), and the bottom wall of the modification tank corresponding to the inlet zone is provided with an inlet port, and the bottom wall of the modification tank corresponding to each outlet zone is provided with an outlet port.

[0016] In the above technical solution, two baffles are added to the modification tank to divide the modification tank into an inlet zone and an outlet zone. The inlet of the modification tank is opened in the inlet zone and the outlet is opened in the outlet zone. This can reduce the disturbance to the working fluid when the liquid is discharged, so that the working fluid in the inlet zone is in a relatively stable state, which helps the working fluid to better wet the carbon fiber, thereby helping to improve the surface modification effect of the carbon fiber.

[0017] In some alternative implementations, the vibrating roller is positioned directly above the inlet of the modification tank.

[0018] In the above technical solution, the vibrating roller is placed directly above the liquid inlet of the modification tank, which enables the air bubbles from the liquid inlet on the carbon fiber surface to quickly detach from the carbon fiber surface, thereby allowing the entire surface of the carbon fiber to fully contact the working liquid, thus improving the surface modification effect of the carbon fiber.

[0019] In some alternative implementations, in the first direction, the size of the liquid inlet zone occupies 90 to 95% of the size of the modification tank.

[0020] In the above technical solution, dividing the liquid inlet area and liquid outlet area according to the above size ratio can provide a sufficiently large modification area for the surface modification of carbon fiber, thereby facilitating the full modification of the carbon fiber surface.

[0021] In some alternative implementations, the circulation tank also includes an online conductivity meter and an online indicator light electrically connected to the online conductivity meter; or / and, the circulation tank is also provided with an agitator.

[0022] In the above technical solution, an online conductivity meter and an online indicator light electrically connected to the online conductivity meter are added to the circulation tank. This allows for real-time monitoring of the concentration of the working fluid in the circulation tank and also provides an alarm function. This facilitates timely replenishment of water or addition of working fluid, helping to maintain the uniformity of the working fluid concentration. In addition, a stirring paddle is added, which can quickly make the concentration of the working fluid uniform after replenishment of water or addition of working fluid through stirring.

[0023] In some alternative implementations, the circulation tank is located directly below the modification tank, and the outlet of the circulation tank is connected to the inlet of the modification tank via a transfer pump.

[0024] In the above technical solution, the circulation tank is set directly below the modification tank, and the outlet of the circulation tank is connected to the inlet of the modification tank through a transfer pump. During the circulation of the working fluid, only the inlet of the modification tank needs to be provided with additional power, which has the advantage of energy saving. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the first carbon fiber surface modification device provided in the embodiments of this application;

[0027] Figure 2 This is a schematic diagram of the structure of the second carbon fiber surface modification device provided in the embodiments of this application;

[0028] Figure 3 A schematic diagram illustrating the combination of a reciprocating linear drive and a vibrating roller, provided for an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the structure of the third carbon fiber surface modification device provided in the embodiments of this application.

[0030] Icons: 10-Carbon fiber surface modification device; 100-Modification tank; 110-Feed side; 120-Discharge side; 130-Baffle; 140-Liquid inlet area; 150-Liquid outlet area; 160-Cathode plate; 200-Conveying roller; 300-Vibrating roller; 310-Roller body; 320-Frame; 400-Reciprocating linear drive; 500-Circulation tank; 510-Online conductivity meter; 520-Online indicator light; 530-Agitator; 540-Conveying pump; 20-Carbon fiber; a-First direction; b-Height direction of modification tank. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of this application, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0035] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] The following is a detailed description of a carbon fiber surface modification device provided in this application.

[0037] See Figure 1 This application provides a carbon fiber surface modification device 10, including a modification tank 100, a plurality of conveying rollers 200, and a vibrating pressure roller 300. The modification tank 100 is used to contain a working fluid and has an inlet side 110 and an outlet side 120 spaced apart along a first direction a, which is perpendicular to the height direction b of the modification tank. The plurality of conveying rollers 200 are spaced apart along the first direction a for conveying carbon fibers 20 along the first direction a. The vibrating pressure roller 300 is spaced apart from the conveying rollers 200 along the first direction a. The bottom of the vibrating pressure roller 300 is located inside the modification tank 100 and is used to abut against the carbon fibers 20, so that the carbon fibers 20 at the vibrating pressure roller 300 are always immersed in the working fluid. The vibrating pressure roller 300 is configured to reciprocate along the height direction b of the modification tank to drive the carbon fibers 20 to vibrate.

[0038] In this application, a vibrating roller 300 is added to the carbon fiber surface modification device 10. Specifically, the vibrating roller 300 and the conveying roller 200 are spaced apart along the first direction a. The bottom of the vibrating roller 300 is located in the modification tank 100 and is used to abut against the carbon fiber 20, so that the carbon fiber 20 at the vibrating roller 300 is always immersed in the working fluid. The vibrating roller 300 is configured to reciprocate along the height direction and drive the carbon fiber 20 to vibrate. That is, the addition of the vibrating roller 300 can cause the carbon fiber 20 to vibrate during the conveying process. Firstly, the carbon fiber 20 vibrates. The vibration can cause bubbles and impurities generated on the surface of carbon fiber 20 to fall off quickly, so that the entire surface of carbon fiber 20 can be fully in contact with the working fluid, thereby improving the surface modification effect of carbon fiber 20. Secondly, the vibration of carbon fiber 20 can also create gaps between the filaments in carbon fiber 20 (carbon fiber 20 is usually formed by many filaments winding together, and gaps are easily generated between the filaments during the vibration process), so that the working fluid can penetrate the interior of carbon fiber 20, which also helps to improve the surface modification effect of carbon fiber 20.

[0039] It should be noted that, currently, to improve the surface modification effect of carbon fiber 20, ultrasonic devices are usually added to the modification tank 100, that is, using the working fluid as a medium and utilizing the cavitation effect of ultrasound to eliminate air bubbles. However, in this application, the researchers provide a completely different solution: specifically, a vibrating roller 300 is added to the modification tank 100, which directly drives the carbon fiber 20 itself to vibrate, so as to efficiently remove air bubbles from the surface of the carbon fiber 20, thereby improving the surface modification effect of the carbon fiber 20.

[0040] It should be noted that the specific form of the modification tank 100 is not limited. For example, it can be an anodizing tank or a liquid phase oxidation tank. When the modification tank 100 is an anodizing tank, the working fluid is the electrolyte; when the modification tank 100 is a liquid phase oxidation tank, the working fluid is an oxidizing solution.

[0041] To better understand the technical solution, this application uses the modified tank 100 as an anodizing tank as an example for auxiliary explanation.

[0042] See Figure 2 It is understandable that when the modification tank 100 is an anodizing tank, the bottom wall of the modification tank 100 is also provided with a cathode plate 160, and the conveying roller 200 is a conductive roller (e.g., a graphite roller). The cathode plate 160 is used to connect to the negative terminal of the external DC power supply, and the conveying roller 200 is used to connect to the positive terminal of the external DC power supply to form a complete current loop.

[0043] It should be noted that when the modification tank 100 is an anodizing tank, the vibrating roller 300 needs to be made of insulating material, such as rubber.

[0044] It should be noted that the relative positions of the multiple conveying rollers 200 are not limited and can be adjusted according to actual needs. For example, some of the conveying rollers 200 may be located inside the modification tank 100 and the remaining conveying rollers 200 may be located outside the modification tank 100. Alternatively, all the conveying rollers 200 may be located outside the modification tank 100 and distributed at intervals on the feed side 110 and the discharge side 120.

[0045] It should be noted that the number of conveyor rollers 200 is not limited and can be adjusted according to actual needs, for example, it can be two, three or four.

[0046] It should be noted that there are no restrictions on the way the vibrating roller 300 is driven. For example, it can be driven manually or by setting up automated devices to drive it automatically.

[0047] See Figure 3 As an example, the carbon fiber surface modification device 10 also includes a reciprocating linear drive 400, the power output end of which is connected to the vibrating roller 300 to drive the vibrating roller 300 to reciprocate along the height direction b of the modification groove.

[0048] In this embodiment, the carbon fiber surface modification device 10 is equipped with a reciprocating linear drive 400. Specifically, the power output end of the reciprocating linear drive 400 is connected to the vibrating roller 300 to drive the vibrating roller 300 to reciprocate along the height direction, which helps to increase the automation level of the vibrating roller 300 and has the advantage of easy operation.

[0049] It should be noted that the form of the reciprocating linear drive 400 is not limited and can be set according to the conventional choices in the field. For example, it can be a motor, cylinder, hydraulic cylinder and reciprocating screw, as long as it can drive the vibrating pressure roller 300 to reciprocate along the height direction b of the modified groove.

[0050] See Figure 3 As an example, the vibrating roller 300 includes a roller body 310 and a frame 320. The frame 320 is rotatably connected to both ends of the roller body 310 in the axial direction. The frame 320 is connected to the power output end of the reciprocating linear drive 400. The roller body 310 and the conveying roller 200 are spaced apart along a first direction a, and the bottom of the roller body 310 is located in the modification groove 100 and is used to abut against the carbon fiber 20.

[0051] In this embodiment, the vibrating roller 300 is configured to have a roller body 310 and a frame 320 working together. Specifically, the frame 320 is rotatably connected to both ends of the roller body 310 along the axial direction. The frame 320 is connected to the power output end of the reciprocating linear drive 400. The roller body 310 and the conveying roller 200 are distributed at intervals along the first direction a. The bottom of the roller body 310 is located in the modified groove 100 and is used to abut against the carbon fiber 20. That is, the roller body 310 can rotate under the drive of the carbon fiber 20 during the conveying process, which helps to reduce the risk of the carbon fiber 20 being damaged by the vibrating roller 300 during the conveying process.

[0052] It is understandable that, in order to stably install and fix the reciprocating linear drive 400 and the vibrating pressure roller 300, an additional fixing bracket can be added. The fixing bracket is connected to the reciprocating linear drive 400 to fix the reciprocating linear drive 400 and the vibrating pressure roller 300.

[0053] It should be noted that the path length of the reciprocating motion of the vibrating roller 300 in the height direction b of the modification tank is not limited and can be adjusted adaptively according to actual needs.

[0054] As an example, the path size of the reciprocating motion of the vibrating roller 300 is 10 to 20 mm, for example, but not limited to any one of the following point values ​​or any range between two: 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm and 20 mm.

[0055] In this embodiment, the path size of the reciprocating motion of the vibrating roller 300 (i.e., the distance between the highest and lowest points of the bottom of the vibrating roller 300 in the height direction b of the modification groove) is limited to a suitable range, which can take into account the appropriate vibration intensity and avoid overstretching the carbon fiber 20 (overstretching can easily damage the carbon fiber 20).

[0056] It should be noted that researchers also found that the concentration of the working fluid changes with continuous use, and the concentration of the working fluid may also vary in different areas within the modification tank 100. Uneven working fluid concentration can easily affect the surface modification effect of carbon fiber 20. Based on this, the carbon fiber surface modification device 10 can be further optimized.

[0057] See Figure 4 As an example, the carbon fiber surface modification device 10 also includes a circulation tank 500, the outlet of which is connected to the inlet of the modification tank 100, and the inlet of the circulation tank 500 is connected to the outlet of the modification tank 100.

[0058] In this embodiment, the carbon fiber surface modification device 10 is equipped with a circulation tank 500. Specifically, the outlet of the circulation tank 500 is connected to the inlet of the modification tank 100, and the inlet of the circulation tank 500 is connected to the outlet of the modification tank 100. The circulation of the working fluid can improve the uniformity of the concentration of the working fluid in the modification tank 100, thereby improving the surface modification effect on the carbon fiber 20.

[0059] It should be noted that the relative positional relationship between the modification tank 100 and the circulation tank 500 is not limited and can be adjusted according to actual needs. For example, they can be distributed side by side with intervals, or they can be staggered along the vertical direction.

[0060] See Figure 4 As an example, the circulation tank 500 is located directly below the modification tank 100, and the outlet of the circulation tank 500 is connected to the inlet of the modification tank 100 via a transfer pump 540.

[0061] In this embodiment, the circulation tank 500 is located directly below the modification tank 100, and the outlet of the circulation tank 500 is connected to the inlet of the modification tank 100 through a transfer pump 540. During the circulation of the working fluid, additional power is only required during the inlet stage of the modification tank 100, which has the advantage of energy saving.

[0062] See Figure 4 As an example, the bottom wall of the modification tank 100 is provided with two baffles 130. The two baffles 130 are located at both ends of the modification tank 100 in the first direction a, so as to divide the modification tank 100 into a liquid inlet area 140 in the middle and a liquid outlet area 150 on both sides of the liquid inlet area 140. The vibrating pressure roller 300 is located in the liquid inlet area 140 (that is, the liquid inlet area 140 is the area where the carbon fiber 20 is surface modified). The modification tank 100 has a liquid inlet on the bottom wall corresponding to the liquid inlet area 140, and the modification tank 100 has a liquid outlet on the bottom wall corresponding to each liquid outlet area 150.

[0063] In this embodiment, two baffles 130 are added to the modification tank 100 to divide the modification tank 100 into an inlet zone 140 and an outlet zone 150. The inlet of the modification tank 100 is opened in the inlet zone 140 and the outlet is opened in the outlet zone 150. This can reduce the disturbance to the working fluid when the fluid is discharged, so that the working fluid in the inlet zone 140 is in a relatively stable state, which helps the working fluid to better wet the carbon fiber 20, thereby helping to improve the surface modification effect of the carbon fiber 20.

[0064] It should be noted that the inlet of the modification tank 100 typically generates a large number of air bubbles. These bubbles easily adhere to the surface of the carbon fiber 20 in that area. The air bubbles on the surface of the carbon fiber 20 make it difficult for the carbon fiber 20 to fully contact the working fluid, resulting in poor surface modification. Therefore, the position of the vibrating roller 300 can be adjusted to address this issue.

[0065] See Figure 4 As an example, the vibrating roller 300 is located directly above the inlet of the modification tank 100.

[0066] In this embodiment, the vibrating roller 300 is positioned directly above the liquid inlet of the modification tank 100, which allows air bubbles from the liquid inlet on the surface of the carbon fiber 20 to quickly detach from the surface of the carbon fiber 20, thereby ensuring that the entire surface of the carbon fiber 20 can fully contact the working fluid, thus improving the surface modification effect of the carbon fiber 20.

[0067] It should be noted that when the bottom wall of the liquid inlet area 140 is provided with a liquid inlet, in order to facilitate the installation of the cathode plate 160, a through hole can be opened in the area of ​​the cathode plate 160 corresponding to the liquid inlet.

[0068] It should be noted that the specifications for dividing the liquid inlet zone 140 and the liquid outlet zone 150 are not limited and can be adjusted according to actual needs.

[0069] As an example, in the first direction a, the size of the liquid inlet zone 140 accounts for 90 to 95% of the size of the modification tank 100, for example, but not limited to any one of 90%, 91%, 92%, 93%, 94% and 95% or any range between two.

[0070] In this embodiment, dividing the liquid inlet area 140 and the liquid outlet area 150 according to the above-mentioned size ratio can provide a sufficiently large modification area for the surface modification of carbon fiber 20, thereby facilitating the full modification of the surface of carbon fiber 20.

[0071] See Figure 4 As an example, the circulation tank 500 also includes an online conductivity meter 510 and an online indicator light 520 electrically connected to the online conductivity meter 510.

[0072] In this embodiment, an online conductivity meter 510 and an online indicator light 520 electrically connected to the online conductivity meter 510 are added to the circulation tank 500. This allows for real-time monitoring of the concentration of the working fluid in the circulation tank 500 and also provides an alarm function. This facilitates timely replenishment of water or addition of working fluid, which helps maintain the uniformity of the working fluid concentration.

[0073] See Figure 4 As an example, the circulation tank 500 is also equipped with an agitator 530.

[0074] In this embodiment, an additional stirring paddle is provided, which allows the concentration of the working solution to quickly become uniform after water or working solution is added, through stirring.

[0075] It should be noted that the structural or functional units in the carbon fiber surface modification device 10 that are not specifically described or limited can be set according to conventional selection in the art.

[0076] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A carbon fiber surface modification device, characterized in that, include: A modification tank for containing a working fluid, the modification tank having an inlet side and an outlet side spaced apart along a first direction, the first direction being perpendicular to the height direction of the modification tank; Multiple conveying rollers, which are spaced apart along the first direction, are used to convey carbon fibers along the first direction; A vibrating pressure roller is provided, which is spaced apart from the conveying roller along the first direction. The bottom of the vibrating pressure roller is located in the modification tank and is used to abut against the carbon fiber, so that the carbon fiber at the vibrating pressure roller is always immersed in the working fluid. The vibrating pressure roller is configured to reciprocate along the height direction of the modification tank to drive the carbon fiber to vibrate.

2. The carbon fiber surface modification apparatus according to claim 1, characterized in that, The carbon fiber surface modification device also includes a reciprocating linear drive, the power output end of which is connected to the vibrating roller to drive the vibrating roller to reciprocate along the height direction of the modification groove.

3. The carbon fiber surface modification apparatus according to claim 2, characterized in that, The vibrating roller includes a roller body and a frame. The frame is rotatably connected to both ends of the roller body along its axial direction. The frame is connected to the power output end of the reciprocating linear drive. The roller body and the conveying roller are spaced apart along the first direction, and the bottom of the roller body is located in the modified groove and is used to abut against the carbon fiber.

4. The carbon fiber surface modification apparatus according to any one of claims 1 to 3, characterized in that, The path length of the reciprocating motion of the vibrating roller is 10-20 mm.

5. The carbon fiber surface modification apparatus according to any one of claims 1 to 3, characterized in that, The carbon fiber surface modification device further includes a circulation tank, the outlet of which is connected to the inlet of the modification tank, and the inlet of the circulation tank is connected to the outlet of the modification tank.

6. The carbon fiber surface modification apparatus according to claim 5, characterized in that, The bottom wall of the modification tank is provided with two baffles, which are located at both ends of the modification tank in the first direction to divide the modification tank into an inlet area in the middle and an outlet area on both sides of the inlet area. The vibrating pressure roller is located in the inlet area, and the modification tank has an inlet port on the bottom wall corresponding to the inlet area. The modification tank also has an outlet port on the bottom wall corresponding to each outlet area.

7. The carbon fiber surface modification apparatus according to claim 6, characterized in that, The vibrating roller is located directly above the liquid inlet of the modification tank.

8. The carbon fiber surface modification apparatus according to claim 6, characterized in that, In the first direction, the size of the liquid inlet area accounts for 90-95% of the size of the modification tank.

9. The carbon fiber surface modification apparatus according to claim 5, characterized in that, The circulation tank also includes an online conductivity meter and an online indicator light electrically connected to the online conductivity meter; Or / and, the circulation tank is also equipped with a stirring paddle.

10. The carbon fiber surface modification apparatus according to claim 5, characterized in that, The circulation tank is located directly below the modification tank, and the outlet of the circulation tank is connected to the inlet of the modification tank via a transfer pump.

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