A carbon fiber precursor filament surface sizing treatment device

Abstract

This utility model belongs to the field of textile technology, specifically a sizing treatment device for carbon fiber precursor fibers. It includes a base, a sizing tank on the top outer wall of the base, and a mounting frame fixedly connected to the top of one side of the sizing tank's outer wall by screws. A U-shaped plate is welded to one end of one side of the mounting frame's outer wall, and symmetrically distributed scraping sponge blocks are adhered to the inner wall of the U-shaped plate. An inclined return groove is welded to one end of the top outer wall of the sizing tank. A drying chamber is located at one end of the sizing tank, and a servo motor is mounted on one side of the drying chamber's outer wall. The output shaft of the servo motor is fixedly connected to a main shaft via a coupling. This utility model effectively solves the problem of uneven sizing coating in traditional sizing processes through the cooperation of the U-shaped plate and the scraping sponge blocks. It employs a drying method combining a rotating frame and an electric heater, ensuring uniform heating of the fibers during rotation, significantly improving drying efficiency and curing quality.

Description

Technical Field

[0001] This utility model relates to the field of textile technology, and in particular to a sizing treatment device for carbon fiber precursor surface. Background Technology

[0002] Sizing treatment of carbon fiber precursor fibers is an important step in carbon fiber production. Its purpose is to coat the fiber surface with a uniform sizing agent to improve fiber bundleability, abrasion resistance, and interfacial adhesion with the matrix material. Traditional sizing treatments often use immersion or spraying methods, where the fibers are directly coated through a sizing tank or spraying area.

[0003] In actual production, sized fibers need to be dried and cured promptly to prevent the sizing from flowing or dripping. Traditional drying equipment is mostly a static heating structure, where the fiber is in a fixed position during the drying process, which can easily lead to uneven heating, resulting in localized over-drying or incomplete curing of the sizing. In addition, the lack of stable guidance and tension control during fiber transport can easily cause defects such as fuzz and broken fibers, increasing the difficulty of subsequent processing and reducing production efficiency and product qualification rate. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a carbon fiber precursor surface sizing treatment device, which overcomes the deficiencies of existing technologies and effectively solves the problems of uneven sizing coating, inability to recover excess sizing material, and low drying efficiency in traditional sizing processes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A carbon fiber precursor surface sizing treatment device includes a base, a sizing tank is provided on the top outer wall of the base, and a mounting frame is fixedly connected to the top of one side outer wall of the sizing tank by screws. A U-shaped plate is welded to one end of one side outer wall of the mounting frame, and symmetrically distributed scraping sponge blocks are adhered to the inner wall of the U-shaped plate. An inclined return groove is welded to one end of the top outer wall of the sizing tank. A drying box is provided at one end of the sizing tank, and a servo motor is provided on one side outer wall of the drying box. The output shaft of the servo motor is fixedly connected to a main shaft through a coupling, and equidistantly distributed rotating frames are welded to the outer wall of the main shaft.

[0006] Preferably, adjacent first guide rings are welded to one side of the outer wall of the mounting frame, and symmetrically adjacent connecting rods are installed through the top outer wall of the mounting frame between the two first guide rings, with a guide wheel rotatably connected to one end of the connecting rod.

[0007] Preferably, a second guide ring and a third guide ring are respectively provided at the top and bottom of one side of the outer wall of the drying box.

[0008] Preferably, an electric heater is installed through the top outer wall of the drying oven, and the electric heater is located above the main shaft.

[0009] Preferably, the rotating frame is located inside the drying chamber, and carbon fiber filaments are wound on the outer wall of the rotating frame. The carbon fiber filaments slide with the guide wheel, and the carbon fiber filaments are disposed through the inner walls of the first guide ring, the second guide ring, and the third guide ring.

[0010] Preferably, a slurry recovery tank is provided on the bottom outer wall of the drying box, and a slurry discharge pipe is installed at the bottom of one side of the outer wall of the slurry recovery tank, and a valve is installed on the outer wall of the slurry discharge pipe.

[0011] Preferably, a motor mounting base is welded to one side of the outer wall of the drying oven, and the servo motor is fixedly connected to the top outer wall of the motor mounting base by screws.

[0012] The beneficial effects of this utility model are as follows: 1. The carbon fiber precursor surface sizing treatment device designed in this paper effectively solves the problem of uneven sizing coating in the traditional sizing process by using a U-shaped plate and a scraping sponge block. The scraping sponge block can form a uniform sizing film on the fiber surface and remove excess sizing, which significantly improves the sizing quality. In addition, the setting of the return tank enables the timely recovery of excess sizing, reducing waste and lowering production costs. 2. The carbon fiber precursor surface sizing treatment device designed in this paper adopts a drying method that combines a rotating frame with an electric heater. The fiber is heated evenly during rotation, which greatly improves drying efficiency and curing quality. In addition, the servo motor drives the rotating frame to precisely control the rotation speed. With the help of the first guide ring, the second guide ring, the third guide ring and the guide wheel, the fiber is stably transported throughout the entire treatment process, reducing the generation of fuzz and broken fibers, and improving production continuity and product qualification rate. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a carbon fiber precursor surface sizing treatment device proposed in this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of a carbon fiber precursor surface sizing treatment device proposed in this utility model. Figure 2 ; Figure 3 This is a schematic diagram of the internal structure of the sizing tank of a carbon fiber precursor surface sizing treatment device proposed in this utility model. Figure 4 This is a schematic diagram of the servo motor connection structure of a carbon fiber precursor surface sizing treatment device proposed in this utility model.

[0014] In the diagram: 1. Base; 2. Slurry tank; 3. Mounting frame; 4. U-shaped plate; 5. Slurry scraper sponge block; 6. Return trough; 7. Drying box; 8. Servo motor; 9. Main shaft; 10. Rotating frame; 11. First guide ring; 12. Connecting rod; 13. Guide wheel; 14. Second guide ring; 15. Third guide ring; 16. Electric heater; 17. Slurry recovery tank; 18. Valve; 19. Slurry discharge pipe; 20. Motor mounting base. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] Reference Figures 1-4 Example 1: A carbon fiber precursor surface sizing treatment device includes a base 1, a sizing tank 2 is provided on the top outer wall of the base 1, and a mounting frame 3 is fixedly connected to the top of one side outer wall of the sizing tank 2 by screws. A U-shaped plate 4 is welded to one end of one side outer wall of the mounting frame 3, and symmetrically distributed scraping sponge blocks 5 are adhered to the inner wall of the U-shaped plate 4. An inclined return groove 6 is welded to one end of the top outer wall of the sizing tank 2.

[0017] Through the above scheme, the base 1 provides stable support for the entire device, and the sizing tank 2 is used to hold the sizing material and provide a sizing environment for the carbon fiber precursor. The mounting frame 3 is fixed to one side of the sizing tank 2, providing a mounting base for the U-shaped plate 4 and the scraping sponge block 5. The opening design of the U-shaped plate 4 facilitates the smooth passage of fibers. The scraping sponge block 5 is made of polyurethane sponge, which is soft and has good liquid absorption. It is used to scrape the fiber surface from both sides, forming a uniform coating on the fiber surface and removing excess sizing material. The return trough 6 is inclined to ensure that excess sizing material flows smoothly back to the sizing tank 2, realizing recycling and reducing waste.

[0018] In this embodiment, the combination of U-shaped plate 4 and scraper sponge block 5 effectively solves the problem of uneven sizing coating in the traditional sizing process. The scraper sponge block 5 can form a uniform sizing film on the fiber surface and remove excess sizing, significantly improving the sizing quality. In addition, the setting of return tank 6 enables timely recycling of excess sizing, reducing waste and lowering production costs.

[0019] Example 2: A sizing treatment device for carbon fiber precursor surface. A drying chamber 7 is provided at one end of the sizing tank 2, and a servo motor 8 is provided on one side of the outer wall of the drying chamber 7. The output shaft of the servo motor 8 is fixedly connected to the main shaft 9 through a coupling. Rotating frames 10 are welded at equal intervals on the outer wall of the main shaft 9. A motor mounting base 20 is welded on one side of the outer wall of the drying chamber 7, and the servo motor 8 is fixedly connected to the top outer wall of the motor mounting base 20 by screws. An electric heater 16 is installed through the top outer wall of the drying chamber 7, and the electric heater 16 is located above the main shaft 9.

[0020] Through the above scheme, the drying chamber 7 provides a closed drying space for the sized fibers. The servo motor 8 drives the rotating frame 10 to rotate via the main shaft 9, causing the fibers to continuously change position during the drying process, resulting in more uniform heating. The rotating frame 10 is evenly distributed along the axial direction of the main shaft 9 to increase the heated area of ​​the fibers and the uniformity of drying. The electric heater 16 (using model: SRY series tubular electric heater) is installed on the top of the drying chamber 7 to provide a stable heat source and accelerate the curing of the slurry. The motor mounting bracket 20 ensures the stable installation of the servo motor 8 and improves the operational stability of the equipment.

[0021] In this embodiment, a drying method combining a rotating frame 10 and an electric heater 16 is adopted. The fibers are heated evenly during rotation, which greatly improves drying efficiency and curing quality. Furthermore, the servo motor 8 drives the rotating frame 10 to precisely control the rotation speed. Together with the first guide ring 11, the second guide ring 14, the third guide ring 15, and the guide wheel 13, it ensures stable fiber transport throughout the entire processing, reduces the generation of fuzz and broken fibers, and improves production continuity and product qualification rate.

[0022] The outer wall of one side of the mounting frame 3 is welded with adjacent first guide rings 11, and the top outer wall of the mounting frame 3 is connected by symmetrically adjacent connecting rods 12 between the two first guide rings 11. One end of the connecting rod 12 is rotatably connected to a guide wheel 13. The top and bottom of one side of the outer wall of the drying oven 7 are respectively provided with a second guide ring 14 and a third guide ring 15.

[0023] With the above-described design, the first guide ring 11 is installed on one side of the mounting frame 3 to guide the fibers in and out of the sizing area. The guide wheel 13 is installed between the two first guide rings 11 via a connecting rod 12, allowing it to rotate freely, reducing friction between the fibers and the equipment, and protecting the fiber surface. The second guide ring 14 and the third guide ring 15 are respectively installed on the top and bottom of the outer wall of the drying chamber 7 to ensure that the fibers maintain the correct path when entering and exiting the drying chamber 7, avoiding deviation or entanglement.

[0024] The rotating frame 10 is located inside the drying oven 7, and carbon fiber filaments are wound on the outer wall of the rotating frame 10. The carbon fiber filaments slide in cooperation with the guide wheel 13, and the carbon fiber filaments are disposed through the inner walls of the first guide ring 11, the second guide ring 14 and the third guide ring 15.

[0025] With the above-described scheme, the rotating frame 10 is located inside the drying chamber 7, and the fibers are wound around it for drying. The rotating design increases the heat-receiving area of ​​the fibers and extends the residence time of the fibers in the drying chamber 7, ensuring that the slurry is fully cured. The fibers slide against the guide wheels 13 and pass through each guide ring, ensuring smooth conveying throughout the entire process.

[0026] The bottom outer wall of the drying oven 7 is provided with a slurry recovery tank 17, and a slurry discharge pipe 19 is installed at the bottom of one side of the outer wall of the slurry recovery tank 17. A valve 18 is installed on the outer wall of the slurry discharge pipe 19.

[0027] With the above-described scheme, the slurry recovery tank 17 is located at the bottom of the drying box 7 to collect the slurry dripping during the drying process. The slurry discharge pipe 19 and valve 18 work together to periodically discharge the recovered slurry for reuse, reducing waste and environmental pollution.

[0028] Working principle: In actual operation, the carbon fiber precursor first enters the sizing area through the first guide ring 11, and after being adjusted in position by the guide wheel 13, it passes through the scraping sponge block 5 inside the U-shaped plate 4 to complete the sizing process. The scraping sponge block 5 forms a uniform sizing film on the fiber surface and scrapes off the excess sizing. The excess sizing flows back to the sizing tank 2 through the return tank 6 for recycling.

[0029] After sizing, the fibers sequentially enter the drying chamber 7 through the second guide ring 14 and are wound onto the rotating frame 10. The servo motor 8 drives the main shaft 9 to rotate the rotating frame 10, ensuring that the fibers rotate continuously during the drying process and are heated evenly. The electric heater 16 provides a stable heat source to accelerate the curing of the sizing.

[0030] The sizing material dripping during the drying process is collected in the sizing recovery tank 17 and can be periodically discharged for reuse through the sizing discharge pipe 19 and valve 18. Finally, the fibers leave the drying chamber 7 through the third guide ring 15, completing the entire sizing process.

[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 sizing the surface of carbon fiber precursor, comprising a base (1), characterized in that, The base (1) has a slurry tank (2) on its top outer wall, and a mounting bracket (3) is fixedly connected to the top of one side outer wall of the slurry tank (2) by screws. A U-shaped plate (4) is welded to one end of the mounting bracket (3), and symmetrically distributed scraping sponge blocks (5) are adhered to the inner wall of the U-shaped plate (4). An inclined return groove (6) is welded to one end of the top outer wall of the slurry tank (2). The slurry tank (2) is equipped with a drying box (7) at one end, and a servo motor (8) is provided on the outer wall of one side of the drying box (7). The output shaft of the servo motor (8) is fixedly connected to the main shaft (9) through a coupling, and rotating frames (10) are welded on the outer wall of the main shaft (9) at equal distances.

2. The carbon fiber precursor surface sizing treatment device according to claim 1, characterized in that, The mounting bracket (3) has adjacent first guide rings (11) welded to one side of its outer wall, and the top outer wall of the mounting bracket (3) is connected by symmetrically adjacent connecting rods (12) between the two first guide rings (11). One end of the connecting rod (12) is rotatably connected to a guide wheel (13).

3. The carbon fiber precursor surface sizing treatment device according to claim 1, characterized in that, The top and bottom of one side of the drying oven (7) are respectively provided with a second guide ring (14) and a third guide ring (15).

4. The carbon fiber precursor surface sizing treatment device according to claim 1, characterized in that, An electric heater (16) is installed through the top outer wall of the drying oven (7), and the electric heater (16) is located above the main shaft (9).

5. The carbon fiber precursor surface sizing treatment device according to claim 1, characterized in that, The rotating frame (10) is located inside the drying box (7), and carbon fiber filaments are wound on the outer wall of the rotating frame (10). The carbon fiber filaments slide with the guide wheel (13), and the carbon fiber filaments are arranged through the inner walls of the first guide ring (11), the second guide ring (14) and the third guide ring (15).

6. The carbon fiber precursor surface sizing treatment device according to claim 1, characterized in that, The bottom outer wall of the drying box (7) is provided with a slurry recovery tank (17), and a slurry discharge pipe (19) is installed at the bottom of one side of the outer wall of the slurry recovery tank (17). A valve (18) is installed on the outer wall of the slurry discharge pipe (19).

7. The carbon fiber precursor surface sizing treatment device according to claim 1, characterized in that, The drying oven (7) has a motor mounting base (20) welded to one side of its outer wall, and the servo motor (8) is fixedly connected to the top outer wall of the motor mounting base (20) by screws.

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