Continuous carbon fiber surface sizing treatment production line

Abstract

The utility model relates to a continuous carbon fiber surface sizing treatment production line, which comprises a continuous yarn releasing device, a continuous yarn feeding device, a continuous yarn feeding device, a continuous yarn feeding device and a continuous yarn feeding device, wherein the continuous yarn feeding device comprises a creel; the creel is provided with a plurality of yarn feeding rollers for winding carbon fiber tows; the sizing device comprises a dipping tank, a guide assembly is arranged in the dipping tank to receive the carbon fiber tows fed by the yarn discharging roller, a spraying assembly is arranged on the periphery of the guide assembly, and the spraying assembly is connected with a slurry supply mechanism; the drying device comprises a ceramic tube, carbon fibers penetrate through the interior of the ceramic tube, and a plurality of heating elements are connected to the periphery of the ceramic tube in a sleeving mode in the axis direction of the ceramic tube; the broadening device comprises a transverse vibration roller assembly and a vertical vibration roller assembly which are used for being in contact with the carbon fibers sent out by the drying device; the winding device comprises a winding roller, the winding roller is used for winding the broadened carbon fiber tows, the winding roller is connected with a rotation driving mechanism to provide power for conveying the carbon fibers, and the production line is high in production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of carbon fiber sizing technology, specifically to a continuous carbon fiber surface sizing treatment production line. Background Technology

[0002] The statements herein provide only background information related to this invention and do not necessarily constitute prior art.

[0003] Carbon fiber is a key reinforcing fiber material for the preparation of high-performance composite materials. It is widely used in production, daily life and composite parts. For carbon fiber, the design and modification of its surface properties are particularly important for the overall function of composite materials, and the sizing treatment of carbon fiber is also a key process in carbon fiber surface treatment.

[0004] Patent CN112680901 B discloses a sizing device and method for large-tow carbon fiber, which uses an impregnation roller and a duckbill spray pipe for sizing. However, it can only complete the sizing process and cannot achieve subsequent drying, spreading, and winding. Patent CN114960070B discloses a continuous carbon fiber sizing device and method, which also can only complete the sizing process and cannot complete subsequent drying, spreading, and winding operations. Patent CN107385735B discloses a system for water washing, drying, sizing, and drying-setting of carbon fiber, which achieves sizing, drying, and spreading of carbon fiber, but it cannot achieve winding. CN105525466B discloses an experimental carbon fiber sizing device, but its ultrasonic amplification device is placed before the sizing device, and the amplification effect of the carbon fiber tow is poor at low temperatures. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a continuous carbon fiber surface sizing production line that organically combines carbon fiber sizing, drying, spreading, and winding into a single production line, achieving a high degree of automation and improving production efficiency.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] In a first aspect, embodiments of this utility model provide a continuous carbon fiber surface sizing treatment production line, comprising:

[0008] Continuous fiber feeding device: includes a yarn frame, which is equipped with multiple fiber feeding rollers for winding carbon fiber bundles;

[0009] Sizing device: includes an impregnation tank, a guide assembly is provided in the impregnation tank to receive the carbon fiber bundle fed in by the feeding roller, a spray assembly is provided around the guide assembly, and the spray assembly is connected to the sizing supply mechanism;

[0010] Drying device: includes a ceramic tube, inside which carbon fibers pass through, and multiple heating elements are sleeved on the outer periphery of the ceramic tube along the axial direction of the ceramic tube;

[0011] The stretching device includes a transverse vibrating roller assembly and a vertical vibrating roller assembly for contacting the carbon fibers delivered by the drying device.

[0012] The winding device includes a winding roller for winding the spread carbon fiber bundle. The winding roller is connected to a rotation drive mechanism to provide power for the carbon fiber conveying.

[0013] Optionally, the guiding assembly includes multiple sets of roller assemblies arranged sequentially along the carbon fiber conveying direction. Each roller assembly includes a first pressure roller and a second pressure roller arranged vertically, and both the first pressure roller and the second pressure roller are rotatably connected to the impregnation tank.

[0014] Optionally, the impregnation tank has a feed inlet on the feeding side, and the feeding end inside the impregnation tank is rotatably connected to the feeding guide roller. The impregnation tank also has a discharge outlet on the discharge side, and the discharge end inside the impregnation tank is rotatably connected to the discharge guide roller.

[0015] Optionally, the spray assembly includes a spray pipe disposed around the periphery of the conveying assembly, and the spray pipe is provided with a plurality of spray heads facing the conveying assembly.

[0016] Optionally, the slurry supply mechanism includes a slurry storage tank located directly above the impregnation tank. The slurry storage tank is connected to the spraying assembly via a slurry outlet pipe, and the bottom of the impregnation tank is connected to the slurry storage tank via a circulation pipe and an extraction pump.

[0017] Optionally, the bottom of the impregnation tank is provided with multiple heating elements.

[0018] Optionally, the heating element is an infrared radiation heating tube.

[0019] Optionally, along the direction of carbon fiber transport, the heating temperature of multiple heating elements connected to the ceramic tube increases sequentially.

[0020] Optionally, the heating element is an electric heating mantle.

[0021] Optionally, the transverse vibration assembly and the vertical vibration assembly are arranged sequentially along the conveying direction of the carbon fiber, and are respectively used to contact the lower surface and the upper surface of the carbon fiber. The transverse vibration assembly includes a transverse vibration roller, which is connected to the transverse vibration mechanism to output horizontal vibration perpendicular to the conveying direction of the carbon fiber. The vertical vibration assembly includes a vertical vibration roller, which is connected to the vertical vibration mechanism to output vertical vibration.

[0022] Secondly, embodiments of this utility model provide a method for a continuous carbon fiber surface sizing production line as described in the first aspect:

[0023] The take-up roller rotates under the drive of the rotation drive mechanism, which drives the carbon fiber to be wound up at the same time, and pulls the carbon fiber out from the unwinding roller in sequence, passing through the sizing device, drying device and spreading device.

[0024] When carbon fiber passes through the sizing device, it is conveyed by the conveying component while the spraying component sprays sizing material onto the surface of the carbon fiber to achieve sizing.

[0025] After sizing, the carbon fiber enters a ceramic tube and is heated and dried by a heating element.

[0026] After drying, the carbon fiber passes through a transverse vibrating roller assembly and a vertical vibrating roller assembly. The transverse vibrating roller assembly applies vibration perpendicular to the carbon fiber's conveying direction, while the vertical vibrating roller assembly applies vertical vibration to the carbon fiber, causing the carbon fiber monofilaments to expand.

[0027] The stretched carbon fiber is wound onto the winding roller by the rotation of the winding roller.

[0028] The beneficial effects of this utility model are as follows:

[0029] 1. In the sizing production line of this utility model, the widening device is set behind the drying device. Before widening, the carbon fiber bundle can be heated, which facilitates the widening of the carbon fiber bundle and results in a better widening effect.

[0030] 2. The sizing production line of this utility model is sequentially equipped with a continuous feeding device, a sizing device, a drying device, a stretching device, and a winding device. The winding device provides power for the carbon fiber conveying, enabling the continuous feeding device to release the carbon fiber. The carbon fiber passes through the sizing device, the drying device, and the stretching device in sequence, and is finally wound up by the winding roller of the winding device. The sizing device can spray sizing onto the carbon fiber through a spray assembly. The drying device can heat and dry the carbon fiber using a heating element. The stretching device stretches the carbon fiber through a transverse vibrating roller assembly and a vertical vibrating roller assembly. The winding roller of the winding device rolls up the stretched carbon fiber. This realizes the organic integration of carbon fiber sizing, drying, stretching, and winding into a whole, improving the automation level of the sizing process and the efficiency of sizing work. Moreover, only the winding device provides power for the carbon fiber conveying, eliminating the need to consider the matching degree of the conveying speed between various devices, reducing the difficulty of production line design and equipment selection.

[0031] 3. The sizing production line of this utility model is equipped with an extraction pump and a circulation pipe, which enables the reuse of sizing material that falls to the bottom of the impregnation tank, thereby improving the utilization rate of sizing material and saving production costs.

[0032] 4. The sizing production line of this utility model utilizes the rotation of the take-up roller to achieve winding while also providing power for carbon fiber conveying. The entire production line only requires a power device at the take-up roller. The continuous feeding device, sizing device, and drying device do not require power transmission equipment, which simplifies the structure of the production line and reduces the equipment investment. Attached Figure Description

[0033] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0034] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0035] The components include: 1. Continuous yarn feeding device; 2. Sizing device; 3. Drying device; 4. Spreading device; 5. Rewinding device; 6. Yarn feeding roller; 7. Ceramic tube; 8. Yarn frame; 9. Infrared radiation heating tube; 10. Roller assembly; 11. Sizing tank; 12. Sizing inlet pipe; 13. Extraction pump; 14. Spray pipe; 15. Electric heating jacket; 16. Horizontal vibrating roller assembly; 17. Vertical vibrating roller assembly; 18. Rewinding roller; 19. Impregnation tank; and 20. Circulation pipe. Detailed Implementation

[0036] Example 1

[0037] This embodiment provides a continuous carbon fiber surface sizing treatment production line, such as... Figure 1 As shown, along the conveying direction of the carbon fiber bundle, there are a continuous feeding device 1, a sizing device 2, a drying device 3, a widening device 4, and a winding device 5 arranged in sequence. The continuous feeding device 1 is used to output the carbon fiber bundle to the sizing device 2. The sizing device 2 is used to sizing the carbon fiber bundle. The drying device 3 is used to receive the sized carbon fiber bundle from the sizing device 2 and heat and dry the sized carbon fiber bundle. The widening device 4 is used to expand the individual filaments of the carbon fiber bundle, thereby expanding the width of the carbon fiber bundle. The winding device 5 is used to wind up the expanded carbon fiber bundle and drive the carbon fiber bundle to be conveyed between the continuous feeding device 1, the sizing device 2, the drying device 3, and the widening device 4.

[0038] The continuous filament feeding device 1 includes a yarn frame 8, on which a plurality of filament feeding rollers 6 are provided. The filament feeding rollers 6 are rotatably connected to the yarn frame 8. The filament feeding rollers 6 are used to wind carbon fiber bundles. There are 2 to 8 filament feeding rollers 6 arranged in two rows, one above the other. In this embodiment, there are two filament feeding rollers 6 arranged one above the other.

[0039] The sizing device 2 includes an impregnation tank 19, which is made of stainless steel or chrome-plated stainless steel. The impregnation tank 19 has a V-shaped structure, with the area of ​​its top end being larger than that of its bottom end. A sealing cap is provided at its top end, and the sealing cap is connected to the impregnation tank by a spring snap to form a sealed cavity inside the impregnation tank 19.

[0040] The impregnation tank 19 has a fiber inlet on the feed side for the carbon fiber bundle to enter, and a fiber outlet on the discharge side for the carbon fiber bundle to be discharged.

[0041] The impregnation tank 19 is provided with a guide assembly for guiding the conveying direction of the carbon fiber bundle. The guide assembly includes multiple sets of roller assemblies 10 arranged along the conveying direction of the carbon fiber bundle. Each roller assembly 10 includes a first pressure roller and a second pressure roller arranged vertically. The carbon fiber bundle passes through the gap between the first pressure roller and the second pressure roller. The first pressure roller and the second pressure roller contact the carbon fiber bundle to guide its movement. Both the first pressure roller and the second pressure roller are rotatably connected to the impregnation tank.

[0042] The number of roller assemblies 10 is flexibly determined according to the sizing and impregnation effect. In this embodiment, six roller assemblies are provided.

[0043] In order to guide the carbon fiber bundle into the guiding assembly, a feeding guide roller is provided on the feeding end of the fiber inlet, i.e. the internal space of the impregnation tank 19. The feeding guide roller is rotatably connected to the impregnation tank 19. In order to discharge the carbon fiber bundle from the impregnation tank 19, a discharge guide roller is provided on the discharge end of the fiber outlet, i.e. the internal space of the impregnation tank. The discharge guide roller is rotatably connected to the impregnation tank 19.

[0044] A spraying component is provided on the outer periphery of the guide component. The spraying component is connected to the slurry supply mechanism. The slurry supply mechanism can feed slurry into the spraying component, and the spraying component sprays the slurry toward the carbon fiber bundle to achieve sizing of the carbon fiber bundle.

[0045] The spray assembly includes a spray pipe 14, which is disposed above the guide assembly and on the feed side and discharge side. The spray pipe 14 is provided with multiple nozzles facing the guide assembly, and the axis of the spray pipe 14 on the discharge side and the feed side is V-shaped.

[0046] The spray pipe 14 located above is connected to one end of the slurry inlet pipe 12. The other end of the slurry inlet pipe 12 passes through the sealing cover and is connected to the slurry outlet at the bottom of the slurry storage tank 11. The slurry storage tank 11 is installed directly above the impregnation tank 19 and is fixed by an external bracket. The bottom end of the impregnation tank 19 is connected to one end of the circulation pipe 20, and the other end of the circulation pipe 20 is connected to the bottom end of the slurry storage tank 11. An extraction pump 13 is installed on the circulation pipe 20 to send the slurry in the impregnation tank 19 back into the slurry storage tank 11, thereby realizing the reuse of the slurry and saving production costs.

[0047] The slurry storage tank 11, circulation pipe 20, slurry inlet pipe 12, and extraction pump 13 together constitute the slurry supply mechanism. The extraction pump 13 injects slurry into the slurry storage tank 11, and the slurry flows into the spray pipe 14 through the slurry inlet pipe 12 under the action of its own gravity and the pressure inside the slurry storage tank 11.

[0048] The slurry storage tank 11 is a 1-2L container made of opaque, acid and alkali resistant material, such as a container made of polytetrafluoroethylene, silicon carbide, phenolic ethylene resin, or organosilicon. In this embodiment, the slurry storage tank is made of 1L polytetrafluoroethylene material.

[0049] The extraction pump flow rate is controlled at 20-80 m. 3 Within the range of / h, the pressure is controlled at 1-5MPa. In this embodiment, the flow rate of extraction pump 13 is controlled at 20m³ / h. 3 / h, pressure controlled at 1MPa.

[0050] Two to six nozzles are provided above the guide assembly and on the inlet and outlet spray pipe sections. Preferably, the nozzles are existing fan-shaped nozzles, with the spray angle controlled in the range of 20-60° and the nozzle diameter controlled in the range of 0.5-2mm. Those skilled in the art can set them according to actual needs.

[0051] In this embodiment, two nozzles are provided on the spray pipe sections above the guide assembly, on the feeding side, and on the discharging side. The spray angle of the nozzles is 60°, and the nozzle orifice diameter is 0.05mm.

[0052] The bottom of the impregnation tank 19 is equipped with multiple heating components, which are infrared radiation heating tubes 9 used to control the temperature of the slurry inside the impregnation tank. During the slurry application process, the slurry temperature is controlled within the range of 20℃-40℃.

[0053] In this embodiment, four infrared radiation heating tubes 9 are provided to control the slurry temperature to be stable at 40°C.

[0054] The drying mechanism uses a ceramic tube 7, with its axis aligned with the direction of the carbon fiber bundle. The inner diameter of the ceramic tube 7 is 100mm-300mm, and its length is 400mm-1000mm. Those skilled in the art can adjust the dimensions according to actual needs. In this embodiment, the inner diameter of the ceramic tube 7 is 150mm, and its length is 600mm. Multiple heating elements are fitted around the outer periphery of the ceramic tube 7 along its axis. These heating elements are existing electric heating sleeves 15. The heating temperature of the multiple heating elements gradually increases from the feed side to the discharge side of the ceramic tube 7 to ensure uniformity of the sizing process. The heating temperature is adjustable within the range of 40-120℃, and those skilled in the art can adjust the dimensions according to actual needs.

[0055] In this embodiment, four electric heating jackets 15 are provided along the direction from the feed side to the discharge side of the ceramic tube 7, and the heating temperatures of the four electric heating jackets 15 are 50°C, 70°C, 90°C and 110°C.

[0056] The widening device includes a transverse vibrating roller assembly 16 and a vertical vibrating roller assembly 17 for contacting the carbon fiber bundles delivered by the drying device.

[0057] The transverse vibrating roller assembly 16 is positioned in front of the vertical vibrating roller assembly 17. The transverse vibrating roller assembly 16 contacts the lower surface of the carbon fiber bundle, and the vertical vibrating roller assembly 17 contacts the upper surface of the carbon fiber bundle. There are 1-3 sets of transverse vibrating roller assemblies 16 and 1-3 sets of vertical vibrating roller assemblies 17. Those skilled in the art can set them according to actual needs. The transverse vibrating roller assembly 16 can apply horizontal vibration to the carbon fiber bundle along the direction perpendicular to the carbon fiber conveying direction, and the vertical vibrating roller assembly 17 can apply vertical vibration to the carbon fiber bundle. Through the effective cooperation of the transverse vibrating roller assembly 16 and the vertical vibrating roller assembly 17, the fiber monofilaments are effectively expanded. The spreading tension is controlled at 5-8N, and the spreading rate is 1-8m / min. Under constant tension, the sized carbon fiber is spread to 3-5 times the original width of the carbon fiber bundle.

[0058] The transverse vibrating roller assembly 16 includes a transverse vibrating roller, which is connected to a transverse vibrating mechanism to output horizontal vibration perpendicular to the carbon fiber conveying direction. The transverse vibrating mechanism can be any existing horizontal vibrating device, and its specific structure will not be described in detail here. The vertical vibrating roller assembly 17 includes a vertical vibrating roller, which is connected to a vertical vibrating mechanism to output vertical vibration. The vertical vibrating device can be any existing vertical vibrating device, and its specific structure will not be described in detail here.

[0059] In this embodiment, two sets of transverse vibrating roller assemblies 16 and two sets of vertical vibrating roller assemblies 17 are set to achieve fiber widening treatment with a 5N widening tension and a yarn spreading rate of 1m / min. The original fiber width is 4mm, and the fiber width is widened to the range of 12-20mm. This embodiment uses vibration widening, which has a better widening effect than ultrasonic widening.

[0060] The winding mechanism includes a winding roller 18, which is rotatably connected to a winding roller bracket. The winding roller 18 is used to wind the spread carbon fiber tow. The winding roller 18 is connected to a rotation drive mechanism to provide power for the carbon fiber conveying. The rotation drive mechanism is a rotation drive motor, which is mounted on the winding roller bracket, and its output shaft is connected to the winding roller 18.

[0061] Example 2

[0062] This embodiment provides a method for a continuous carbon fiber surface sizing production line. A rotating drive motor drives the take-up roller 18 to rotate, and the take-up roller drives the carbon fiber bundle to be conveyed between the continuous unwinding device 1, the sizing device 2, the drying device 3, and the stretching device 4.

[0063] The unloading roller 6 rotates to release the carbon fiber bundle. After passing through the feeding guide rail, the carbon fiber bundle passes through multiple roller assemblies 10 in sequence. During the movement of the carbon fiber bundle in the impregnation tank 19, the extraction pump 13 works. The slurry in the slurry storage tank 11 is sprayed out through the spray pipe 14 and the nozzle and sprayed onto the surface of the carbon fiber bundle to achieve sizing. At the same time, the slurry that is not sprayed onto the surface of the carbon fiber bundle flows back to the slurry storage tank 11 through the extraction pump 13 for reuse. The sized carbon fiber bundle is discharged through the discharge guide roller and enters the ceramic tube 7. After passing through the ceramic tube 7, it is heated and dried in stages by multiple electric heating jackets 15. The dried carbon fiber bundle passes through the transverse vibrating roller assembly 16 and the vertical vibrating roller assembly 17 in sequence. Under the action of the transverse vibrating roller assembly 16 and the vertical vibrating roller assembly 17, it is widened. The widened carbon fiber bundle is then wound up on the take-up roller 18.

[0064] The sizing production line and method of this embodiment organically combine carbon fiber sizing, drying, spreading and winding into a whole, which improves the automation level of the sizing process and the efficiency of sizing work. Moreover, only the winding device provides the power for carbon fiber conveying, so there is no need to consider the matching degree of conveying speed between various devices, which reduces the difficulty of production line design and equipment selection.

[0065] Moreover, the stretching device is located after the drying device, and it can heat the carbon fiber bundles before stretching, resulting in a better stretching effect.

[0066] Example 3

[0067] This embodiment provides a continuous carbon fiber surface sizing production line. Compared with Embodiment 1, the difference lies in that the unloading rollers 6 are arranged in 4 sets, the bottom of the impregnation tank 19 is equipped with 5 sets of infrared radiation heating tubes 9 to control the internal sizing temperature at 36℃, the roller assembly 10 is arranged in three sets, the sizing storage tank 11 is a 2L capacity silicon carbide container, and the extraction pump 13 has a flow rate of 30m³. 3 / h, with an output pressure of 2Mpa, each part of the spray pipe 14 is equipped with 4 nozzles with a spray angle of 50° and an orifice diameter of 0.1mm to achieve continuous spraying.

[0068] The ceramic tube 7 has an inner diameter of 150 mm and a length of 600 mm. The heating temperatures of the four electric heating jackets 15 are 50℃, 70℃, 90℃ and 110℃.

[0069] The fiber spreading device is equipped with one set of transverse vibrating roller assembly 16 and one set of vertical vibrating roller assembly 17 to achieve fiber spreading treatment with 6N spreading tension and 3m / min spreading rate. The original fiber width is 5mm, and the fiber width is 15-25mm after spreading.

[0070] The remaining structure is the same as in Example 1, and will not be described again here.

[0071] Example 4

[0072] This embodiment provides a continuous carbon fiber surface sizing production line. Compared with embodiment 1, the difference is that the continuous feeding device 1 is equipped with 5 sets of feeding rollers 6, the impregnation tank 19 is made of chrome-plated stainless steel, and is equipped with 5 sets of infrared radiation heating tubes 9 inside to control the internal sizing temperature at 35°C. The impregnation tank 19 is equipped with 4 sets of roller assemblies 10.

[0073] The slurry storage tank 11 is a 1.5L vertical container made of phenolic ethylene, and the extraction pump 13 has a pressure of 70m. 3 / h, with an output pressure of 2MPa, and each section of the spray pipe 14 is equipped with 5 nozzles with a spray angle of 55° and an orifice diameter of 0.15mm to achieve continuous spraying.

[0074] The ceramic tube 7 has an inner diameter of 200 mm and a length of 900 mm. The heating temperatures of the four electric heating jackets 15 are 40℃, 60℃, 80℃ and 120℃.

[0075] The fiber spreading device is equipped with three sets of transverse vibrating roller assemblies 16 and three sets of vertical vibrating roller assemblies 17 to achieve fiber spreading treatment with 8N spreading tension and 4m / min spreading rate. The original fiber width is 6mm, and the fiber width is 18-30mm after spreading.

[0076] The remaining structure of this embodiment is the same as that of Embodiment 1, and will not be described again here.

[0077] Example 5:

[0078] This embodiment provides a continuous carbon fiber surface sizing production line. Compared with embodiment 1, the difference is that the continuous feeding device 1 is equipped with 7 sets of feeding rollers 6, the impregnation tank 19 is made of chrome-plated stainless steel, and is equipped with 6 infrared radiation heating tubes 9 inside to control the temperature of the internal sizing material at 40°C. The impregnation tank 19 is equipped with 6 sets of roller assemblies 10 inside.

[0079] The slurry storage tank 11 is a 1.8L container made of silicone material, and the extraction pump 13 has a flow rate of 65m³ / h. 3 / h, with an output pressure of 3Mpa, each section of the spray pipe 14 is equipped with 6 nozzles with a spray angle of 55° and an orifice diameter of 0.06mm to achieve continuous spraying.

[0080] The ceramic tube 7 has an inner diameter of 280 mm and a length of 1000 mm. Three electric heating jackets 15 are arranged around the outer periphery of the ceramic tube 7. The heating temperatures of the three electric heating jackets 15 are 45℃, 85℃ and 115℃ respectively.

[0081] The fiber spreading device is equipped with two sets of transverse vibrating roller assemblies 16 and two sets of vertical vibrating roller assemblies 17 to achieve fiber spreading treatment with a spreading tension of 7.5N and a spreading rate of 6m / min. The original fiber width is 7mm, and the fiber width after spreading is in the range of 7-35mm.

[0082] The remaining structure of this embodiment is the same as that of Embodiment 1, and will not be described again here.

[0083] 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 continuous carbon fiber surface sizing process production line characterized by, include: Continuous yarn feeding device: includes a yarn frame, which is equipped with multiple yarn feeding rollers for winding carbon fiber bundles; Sizing device: includes an impregnation tank, a guide assembly is provided in the impregnation tank to receive the carbon fiber bundle fed in by the feeding roller, a spray assembly is provided around the guide assembly, and the spray assembly is connected to the sizing supply mechanism; Drying device: includes a ceramic tube, inside which carbon fibers pass through, and multiple heating elements are sleeved on the outer periphery of the ceramic tube along its axial direction; The stretching device includes a transverse vibrating roller assembly and a vertical vibrating roller assembly for contacting the carbon fibers delivered by the drying device. The winding device includes a winding roller for winding the spread carbon fiber bundle. The winding roller is connected to a rotation drive mechanism to provide power for the carbon fiber conveying.

2. A continuous carbon fiber surface sizing process line as claimed in claim 1, wherein, The guiding assembly includes multiple sets of roller assemblies arranged sequentially along the carbon fiber conveying direction. Each roller assembly includes a first pressure roller and a second pressure roller arranged vertically. Both the first pressure roller and the second pressure roller are rotatably connected to the impregnation tank.

3. A continuous carbon fiber surface sizing process line as claimed in claim 1, wherein, The impregnation tank has a feed inlet on the feed side and the feed end inside the impregnation tank is rotatably connected to the feed guide roller. The impregnation tank has a discharge outlet on the discharge side and the discharge end inside the impregnation tank is rotatably connected to the discharge guide roller.

4. A continuous carbon fiber surface sizing process line as claimed in claim 1, wherein, The spray assembly includes a spray pipe located around the conveying assembly, and the spray pipe has multiple spray heads facing the conveying assembly.

5. A continuous carbon fiber surface sizing process line as claimed in claim 1, wherein, The slurry supply mechanism includes a slurry storage tank located directly above the impregnation tank. The slurry storage tank is connected to the spraying assembly via a slurry outlet pipe. The bottom of the impregnation tank is connected to the slurry storage tank via a circulation pipe and an extraction pump.

6. A continuous carbon fiber surface sizing process line as claimed in claim 1, wherein, The bottom of the impregnation tank is equipped with multiple heating elements.

7. A continuous carbon fiber surface sizing process line as claimed in claim 6, wherein, The heating element uses an infrared radiation heating tube.

8. A continuous carbon fiber surface sizing process line as claimed in claim 1, wherein, Along the direction of carbon fiber transport, the heating temperature of multiple heating elements connected to the ceramic tube increases sequentially.

9. A continuous carbon fiber surface sizing process line as claimed in claim 1, wherein, The heating element is an electric heating jacket.

10. A continuous carbon fiber surface sizing process line as claimed in claim 1, wherein, The transverse vibration assembly and the vertical vibration assembly are arranged sequentially along the conveying direction of the carbon fiber, and are respectively used to contact the lower surface and the upper surface of the carbon fiber. The transverse vibration assembly includes a transverse vibration roller, which is connected to the transverse vibration mechanism to output horizontal vibration perpendicular to the conveying direction of the carbon fiber. The vertical vibration assembly includes a vertical vibration roller, which is connected to the vertical vibration mechanism to output vertical vibration.

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