Carbon fiber sizing device

Abstract

The utility model discloses a carbon fiber sizing device which comprises an upper layer sizing tank, a lower layer sizing tank and a conveying structure enabling carbon fibers to pass through each layer of sizing tank for sizing, and at least two sub sizing tanks which are independently arranged are arranged in the lower layer sizing tank; at least two sub-sizing tanks are arranged in the lower-layer sizing tank, so that different types of sizing agents can be applied to carbon fibers at the same time, various carbon fiber sizing agent products can be produced on one production line at the same time, and the production efficiency and the production continuity of the carbon fiber sizing agent products can be improved; and the production cost of the carbon fiber sizing agent product is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of carbon fiber technology, specifically, it relates to a carbon fiber sizing device. Background Technology

[0002] Carbon fiber is an inorganic polymer fiber with a carbon content of over 90%. It is a microcrystalline graphite material obtained by carbonizing and graphitizing organic fibers, such as acrylic fibers, pitch, and viscose fibers, in an inert gas environment. Carbon fiber possesses many excellent mechanical properties. Compared with metals such as titanium, steel, and aluminum, it not only has the inherent properties of carbon materials but also the flexibility and processability of textile fibers. It also boasts numerous superior properties such as high strength, high modulus, high temperature resistance, corrosion resistance, fatigue resistance, creep resistance, electrical conductivity, thermal conductivity, and a low coefficient of thermal expansion. It is widely used in military fields such as aircraft manufacturing, aerospace, and missile rockets; industrial fields such as wind turbine blades and automobile manufacturing; and sports and leisure fields such as golf clubs, badminton rackets, and bicycles.

[0003] Although carbon fiber has excellent properties, it is difficult to use alone and needs to be used as a reinforcement in advanced composite materials. Furthermore, carbon fiber requires high-temperature carbonization treatment to obtain it. High-temperature carbonization treatment will cause the carbon fiber surface to exhibit high chemical inertness, so the carbon fiber surface must be modified by sizing.

[0004] In the existing production process of carbon fiber sizing agents, single-layer and single-tank sizing processes are used. In addition, different types of sizing agents cannot be mixed together. Therefore, it is difficult to produce multiple carbon fiber sizing agent products on a single production line at the same time. The production line can only be stopped after one type is completed, the sizing agent is changed, and then the production line is restarted. This results in common problems such as low production efficiency, frequent downtime, poor production continuity, and high production costs.

[0005] In view of the above, this utility model is hereby proposed. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a carbon fiber sizing device. By setting at least two sub-sizing tanks in the lower sizing tank, the carbon fiber can be coated with different types of sizing agents at the same time, thereby realizing the simultaneous production of multiple carbon fiber sizing agent products on a single production line. This achieves the purpose of improving the production efficiency and continuity of carbon fiber sizing agent products, as well as reducing the production cost of carbon fiber sizing agent products.

[0007] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0008] This utility model provides a carbon fiber sizing device, including an upper sizing tank, a lower sizing tank, and a conveying structure for sizing the carbon fiber through each sizing tank. Its characteristic is that...

[0009] The lower sizing tank has at least two independent sub-sizing tanks.

[0010] Furthermore, at least two sub-slurry tanks are arranged in a certain direction;

[0011] The inlet and outlet sides of all sizing tanks are located on opposite sides of the sizing device.

[0012] Furthermore, there is a certain distance between two adjacent sub-slurry tanks.

[0013] Furthermore, at least two baffles are provided in the lower slurry tank;

[0014] At least two partitions divide the interior of the lower slurry tank into at least two sub-slurry tanks.

[0015] Furthermore, the lower slurry tank is equipped with two partitions arranged in a front-to-back direction and spaced apart;

[0016] One partition forms a sub-sizing tank with the front side of the lower sizing tank, and another partition forms another sub-sizing tank with the rear side of the lower sizing tank.

[0017] The inlet and outlet sides of all sizing tanks are located on the left and right sides of the sizing device, respectively.

[0018] Furthermore, the conveying structure includes an inlet roller, an outlet roller, and several conveying units that cooperate with the sizing trough for sizing.

[0019] The inlet roller and outlet roller are respectively located on the inlet side and outlet side of all sizing tanks, and several conveying units share the inlet roller and outlet roller.

[0020] The conveying unit includes several first guide rollers, wherein the two ends of the first guide rollers immersed in the sizing agent in the sizing tank are rotatably mounted on two partitions.

[0021] Furthermore, it also includes a drying structure for drying the sized carbon fibers. The drying structure includes a drying chamber with a drying channel inside for the carbon fibers to pass through, and electric heating wires are arranged around the drying channel.

[0022] Furthermore, the exterior of the drying chamber is equipped with multiple second guide rollers for guiding the carbon fibers to enter and exit the drying channel multiple times.

[0023] Furthermore, it also includes several circulation units for the sizing agent in the sizing tank;

[0024] The circulation unit includes a circulation pipe and a circulation pump connected in series with the circulation pipe;

[0025] The sizing tank is divided into an inlet zone, a sizing zone, and an outlet zone from the inlet side to the outlet side.

[0026] One end of the circulation pipe is connected to the liquid inlet area of ​​the slurry tank, and the other end is connected to the liquid outlet area of ​​the slurry tank.

[0027] Furthermore, it also includes a heating structure for heating the sizing agent, the heating structure comprising several jackets wrapped around the outside of the corresponding sizing tank.

[0028] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art.

[0029] By setting at least two sub-sizing tanks in the lower sizing tank, carbon fibers can be coated with different types of sizing agents simultaneously, thereby enabling the simultaneous production of multiple carbon fiber sizing agent products on a single production line. This improves the production efficiency and continuity of carbon fiber sizing agent products, and reduces their production costs.

[0030] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0031] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0032] Figure 1 A schematic diagram of the carbon fiber sizing device provided in an embodiment of this utility model;

[0033] Figure 2 A top view of the carbon fiber sizing device provided in an embodiment of this utility model.

[0034] Icons: 1-Upper sizing tank; 2-Lower sizing tank; 21-Sub-sizing tank; 22-Inlet zone; 23-Sizing zone; 24-Outlet zone; 3-Baffle; 4-Conveying structure; 41-Inlet roller; 42-Outlet roller; 43-First guide roller; 43a-First inlet guide roller; 43b-Sizing guide roller; 43c-First extrusion guide roller; 43d-Second extrusion guide roller; 5-Drying structure; 51-Drying box; 52-Drying channel; 6-Second guide roller; 6a-First outlet guide roller; 6b-Second inlet guide roller; 6c-Second outlet guide roller; 7-Circulation unit; 71-Circulation pump; 72-Circulation pipe; 8-Heating structure; 81-Jacket; 811-Jacket inlet; 812-Jacket outlet; 9-Carbon fiber.

[0035] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0037] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] like Figure 1 and Figure 2 As shown, this utility model provides a carbon fiber sizing device, including an upper sizing tank 1, a lower sizing tank 2, and a conveying structure 4 for sizing carbon fiber 9 through each sizing tank. The lower sizing tank 2 is provided with at least two sub-sizing tanks 21 that are independently arranged.

[0040] In this embodiment of the present invention, by setting at least two sub-sizing tanks 21 in the lower sizing tank 2, the carbon fiber 9 can be coated with different types of sizing agents at the same time, thereby enabling the simultaneous production of multiple carbon fiber 9 sizing agent products on a single production line. This improves the production efficiency and continuity of carbon fiber 9 sizing agent products, and reduces the production cost of carbon fiber 9 sizing agent products.

[0041] Preferably, the upper sizing tank 1 and the lower sizing tank 2 are arranged vertically; the upper sizing tank 1 and all the sub-sizing tanks 21 can hold different types of sizing agents; the sizing device includes a frame or a housing, and the upper sizing tank 1, the lower sizing tank 2, the conveying structure 4, etc., are mounted on the frame or inside the housing. The upper sizing tank 1 and all the sub-sizing tanks 21 can sizing carbon fiber 9 simultaneously or individually.

[0042] The conveying structure 4 is responsible for sizing the carbon fiber 9 by passing it sequentially through the sub-sizing tanks 21 of the upper sizing tank 1 and the lower sizing tank 2.

[0043] In an embodiment of this utility model, at least two sub-slurry tanks 21 are arranged in a certain direction;

[0044] The inlet and outlet sides of all sizing tanks are located on opposite sides of the sizing device.

[0045] In this embodiment of the invention, at least two sub-sizing tanks 21 are arranged in a certain direction. This arrangement helps the carbon fibers 9 to be sized sequentially and orderly through each sub-sizing tank 21 under the guidance of the conveying structure 4. The choice of the arrangement direction may depend on the overall layout of the sizing device, the conveying method of the carbon fibers 9, and the specific requirements of the sizing process.

[0046] The inlet and outlet sides of all sizing tanks are located on opposite sides of the sizing device. This layout ensures that the carbon fiber 9 can smoothly enter and exit each sizing tank during the conveying process, avoiding problems such as blockage or scratches of the carbon fiber 9 caused by improper layout. Among them, all sizing tanks include the upper sizing tank 1 and all sub-sizing tanks 21. The relative positions of the inlet and outlet sides of the sizing tanks also help to achieve the continuity and stability of the sizing process and improve production efficiency.

[0047] It should be noted that the inlet side of the sizing tank refers to the side where the carbon fiber 9 enters the sizing tank, and the outlet side refers to the side where the carbon fiber 9 exits the sizing tank.

[0048] In the embodiments of this utility model, there is a certain distance between two adjacent sub-slurry tanks 21.

[0049] In the embodiments of this utility model, the sub-sizing tank 21 typically contains different types or concentrations of sizing agents. By setting a certain spacing, cross-contamination of sizing agents in adjacent sub-sizing tanks 21 can be effectively avoided, ensuring the accuracy and stability of the sizing process. The spacing allows operators to more easily clean and maintain each sub-sizing tank 21, which helps reduce production costs, increase the service life of the equipment, and ensure the continuous stability of sizing quality.

[0050] To accommodate different types and specifications of carbon fiber 9, the spacing in the sizing device can be adjusted, which can be achieved by setting up structures such as slide rails.

[0051] Furthermore, the lower slurry tank 2 is provided with at least two baffles 3;

[0052] At least two partitions 3 divide the interior of the lower slurry tank 2 into at least two sub-slurry tanks 21.

[0053] Specifically, the lower slurry tank 2 is provided with two partitions 3 arranged in the front-to-back direction and spaced apart;

[0054] One partition 3 forms a sub-slurry 21 with the front side of the lower slurry 2, and another partition 3 forms another sub-slurry 21 with the rear side of the lower slurry 2;

[0055] The inlet and outlet sides of all sizing tanks are located on the left and right sides of the sizing device, respectively.

[0056] The upper slurry tank 1 and the lower slurry tank 2 extend in the left and right directions. The inlet side of the upper slurry tank 1 and the inlet side of all the sub-slurry tanks 21 are on the left side, and the outlet side of the upper slurry tank 1 and the outlet side of all the sub-slurry tanks 21 are on the right side.

[0057] Two partitions 3 are arranged one after the other in the lower sizing tank 2. It can be understood that the two partitions 3 are arranged in parallel and extend in the left and right directions respectively. Each partition 3 extends to connect with the left side wall and the right side wall of the lower sizing tank 2. One partition 3 forms a sub-sizing tank 21 with the front side wall, the front side of the left side wall and the front side of the right side wall of the upper sizing tank 1. The other partition 3 forms another sub-sizing tank 21 with the rear side wall, the rear side of the left side wall and the rear side of the right side wall of the upper sizing tank 1. The internal space of the two sub-sizing tanks 21 has the same size. The two partitions 3 are arranged at intervals so that there is a certain gap between the two sub-sizing tanks 21 formed.

[0058] In an embodiment of this utility model, the conveying structure 4 includes an inlet roller 41, an outlet roller 42, and several conveying units that cooperate with the sizing tank for sizing.

[0059] The inlet roller 41 and the outlet roller 42 are respectively located on the inlet side and the outlet side of all the slurry tanks, and several conveying units share the inlet roller 41 and the outlet roller 42.

[0060] The conveying unit includes a plurality of first guide rollers 43, wherein the two ends of the first guide rollers 43 immersed in the sizing agent in the sizing tank are rotatably mounted on two partitions 3.

[0061] In the embodiments of this utility model, the conveying structure 4 is a key part of the sizing device for carbon fiber 9. It is responsible for smoothly and continuously introducing carbon fiber 9 into the sizing tank, and then exporting it after sizing treatment.

[0062] The inlet and outlet sides of the sizing tanks refer to the inlet side of the upper sizing tank 1 and the inlet side of the sub-sizing tank 21. The guide roller 41 is located on the inlet side of all sizing tanks to smoothly introduce the carbon fiber 9 into each sizing tank, avoiding excessive tension or friction at the inlet side. The outlet roller 42 is located on the outlet side of all sizing tanks to export the sizing-treated carbon fiber 9. The outlet roller 42 also needs to ensure that the carbon fiber 9 can smoothly and continuously leave the sizing tank for subsequent processing or treatment.

[0063] The conveying unit is the core component of the conveying structure 4, responsible for providing necessary support and guidance as the carbon fiber 9 passes through each sizing tank. The conveying unit includes several first guide rollers 43, which play a crucial role in the sizing process of the carbon fiber 9. Several conveying units share the same inlet roller 41 and outlet roller 42. This design simplifies the complexity of the conveying structure 4, reduces manufacturing costs, and ensures the continuity and stability of the carbon fiber 9 during the conveying process.

[0064] Specifically, the plurality of first guide rollers 43 include a first feed guide roller 43a, two sizing guide rollers 43b, a first extrusion guide roller 43c and a second extrusion guide roller 43d; the plurality of first guide rollers 43 are arranged facing the sizing tank;

[0065] Two sizing guide rollers 43b are arranged in a left-right direction and are parallel to each other. At least part of the sizing guide rollers 43b are immersed in the sizing liquid in the sizing zone 23 of the sizing tank. The first infeed guide roller 43a is located diagonally above the left sizing guide roller 43b. The first extrusion guide roller 43c and the second extrusion guide roller 43d are located diagonally above the right sizing guide roller 43b. The second extrusion guide roller 43d is parallel to the first infeed guide roller 43a. The first extrusion guide roller 43c is located diagonally above the left side of the second extrusion guide roller 43d. The first extrusion guide roller 43c is movable, while the position of the second extrusion guide roller 43d is fixed. The first extrusion guide roller 43c is a rubber roller, and the second extrusion guide roller 43d is a mirror-finished roller made of stainless steel. Carbon fiber 9 is sandwiched between the first extrusion guide roller 43c and the second extrusion guide roller 43d, and excess sizing agent on the carbon fiber 9 is extruded into the sizing zone 23.

[0066] The first guide roller 43 immersed in the sizing agent in the sizing tank is the sizing guide roller 43b. Specifically, the sizing guide roller 43b is rotatably mounted on two partitions 3 to ensure that the carbon fiber 9 can be evenly and stably coated with the sizing agent when passing through the sizing tank.

[0067] During sizing, the carbon fiber 9 starts from the inlet roller 41, passes through the first inlet guide roller 43a and the two sizing guide rollers 43b in sequence to enter the sizing tank for sizing treatment. In the sizing tank, it fully contacts the sizing agent to form a uniform sizing layer. Then it passes through the first extrusion guide roller 43c and the second extrusion guide roller 43d. The first extrusion guide roller 43c and the second extrusion guide roller 43d work together to extrude the excess sizing agent. Finally, it leaves each sizing tank from the outlet roller 42.

[0068] In the embodiments of this utility model, a drying structure 5 is also included for drying the sized carbon fiber 9. The drying structure 5 includes a drying box 51, and the interior of the drying box 51 has a drying channel 52 for the carbon fiber 9 to pass through. Electric heating wires are arranged around the drying channel 52.

[0069] In this embodiment of the invention, the drying structure 5 is an important component of the carbon fiber 9 sizing device. It is responsible for drying the sized carbon fiber 9 to remove excess sizing agent and moisture, ensuring the surface quality and subsequent processing performance of the carbon fiber 9. The core component of the drying structure 5 is a closed box with a drying channel 52 inside for the carbon fiber 9 to pass through. The design of the drying box 51 should ensure that the carbon fiber 9 is uniformly and fully subjected to heat during passage, thereby achieving a rapid and effective drying effect. Located inside the drying box 51, it is the main path for the carbon fiber 9. The design of the drying channel 52 should take into account factors such as the specifications of the carbon fiber 9, the thickness of the sizing layer, and the drying efficiency to ensure that the carbon fiber 9 maintains a stable conveying speed and drying quality during passage.

[0070] The drying channel 52 can be the entire space inside the drying chamber 51, or it can be a channel defined within the drying chamber 51 that ensures the passage of the carbon fiber 9.

[0071] Electric heating wires are installed around the drying channel 52. These heating wires generate heat to heat the air inside the drying chamber 51, thereby drying the carbon fiber 9. The heating wires should be evenly and reasonably arranged to ensure uniform temperature distribution within the drying channel 52 and avoid localized overheating or insufficient drying. The electric heating wires are not shown in the figure.

[0072] Electric heating wires typically employ resistance heating, generating heat through the action of an electric current. The material and specifications of the heating wire should be selected based on factors such as the dimensions of the drying oven 51, the specifications of the carbon fiber 9, and the drying efficiency to ensure optimal drying results.

[0073] After sizing, the carbon fiber 9 enters the drying chamber 51 through the inlet of the drying channel 52. During the process of passing through the drying channel 52, it is subjected to the heat generated by the surrounding electric heating wires, and the moisture and excess sizing agent in the sizing layer gradually evaporate, making the surface of the carbon fiber 9 dry and smooth. Then, the carbon fiber 9 leaves the drying chamber 51 through the outlet of the drying channel 52 and enters the subsequent processing or treatment stage.

[0074] In this embodiment of the invention, the exterior of the drying chamber 51 is provided with a plurality of second guide rollers 6 for guiding the carbon fibers 9 to enter and exit the drying channel 52 multiple times.

[0075] In this embodiment of the invention, multiple second guide rollers 6 are provided on the outside of the drying chamber 51 to guide the carbon fiber 9 to enter and exit the drying channel 52 multiple times. This design can further increase the residence time of the carbon fiber 9 in the drying channel 52, thereby ensuring that it is more fully subjected to heat and improving the drying effect.

[0076] The main function of the second guide roller 6 is to guide the carbon fiber 9 to enter and exit the drying channel 52 multiple times outside the drying chamber 51. By arranging these guide rollers reasonably, one or more circulation paths can be formed, allowing the carbon fiber 9 to pass through the drying channel 52 multiple times. Because the carbon fiber 9 passes through the drying channel 52 multiple times, its heating time is significantly extended, which helps to more thoroughly remove moisture and solvent from the sizing layer and improve the drying quality of the carbon fiber 9. By increasing the residence time of the carbon fiber 9 in the drying channel 52, the drying efficiency can be improved without increasing the drying temperature, which helps to reduce energy consumption and reduce the risk of deformation or damage to the carbon fiber 9 caused by high-temperature drying.

[0077] The arrangement of the second guide rollers 6 should be reasonable to ensure that the carbon fiber 9 can maintain a stable and continuous movement during its passage. At the same time, the number and position of the second guide rollers 6 should be designed and adjusted according to parameters such as the specifications of the carbon fiber 9, the size of the drying channel 52, and the required drying time.

[0078] Specifically, the plurality of second guide rollers 6 include a first exit guide roller 6a for leading the carbon fiber 9 out of the drying channel 52, a second inlet guide roller 6b for leading the carbon fiber 9 into the drying channel 52, and a second exit guide roller 6c for leading the carbon fiber 9 out of the drying channel 52; the exit roller 42 and the second exit guide roller 6c are located below the drying chamber 51 and are arranged in parallel, the first exit guide roller 6a and the second inlet guide roller 6b are located above the drying chamber 51 and are arranged in parallel, and the exit roller 42, the first exit guide roller 6a, the second inlet guide roller 6b and the second exit guide roller 6c are arranged sequentially along the moving path of the carbon fiber 9.

[0079] In embodiments of this utility model, there are also several circulation units 7 for circulating the sizing agent in the sizing tank;

[0080] The circulation unit 7 includes a circulation pipe 72 and a circulation pump 71 connected in series with the circulation pipe 72;

[0081] The sizing tank is divided into an inlet zone 22, a sizing zone 23 and an outlet zone 24 from the inlet side to the outlet side.

[0082] One end of the circulation pipe 72 is connected to the liquid inlet area 22 of the slurry tank, and the other end is connected to the liquid outlet area 24 of the slurry tank.

[0083] In the embodiments of this utility model, the upper sizing tank 1 and all sub-sizing tanks 21 are equipped with a circulation unit 7, or all sub-sizing tanks 21 are equipped with a circulation unit 7. The upper sizing tank 1 and the sub-sizing tanks 21 are divided into an inlet zone 22, a sizing zone 23 and an outlet zone 24.

[0084] One end of the circulation pipe 72 is connected to the inlet area 22 of the sizing tank, and the other end is connected to the outlet area 24 of the sizing tank, forming a closed circulation loop. The sizing agent can continuously circulate within the sizing tank through the circulation pipe 72. The circulation pump 71 is the power source that drives the sizing agent to flow within the circulation pipe 72. It is typically connected in series with the circulation pipe 72, generating a pressure difference to propel the sizing agent through the circulation loop. The selection and design of the circulation pump 71 should be based on parameters such as the flow rate of the sizing agent, pressure loss, and the required circulation speed. Specifically, the circulation pipe 72 is located at the bottom of the sizing tank, and it is connected to the bottom of both the inlet area 22 and the outlet area 24.

[0085] The inlet zone 22 is located on the inlet side of the sizing tank and is used to receive newly added sizing agent or treated recycled sizing agent. The setting of the inlet zone 22 helps to control the amount and speed of sizing agent addition, thereby ensuring the stability and controllability of the sizing process. The sizing zone 23 is the main area in the sizing tank where the carbon fiber 9 comes into contact with the sizing agent and undergoes a sizing reaction. In the sizing zone 23, the carbon fiber 9 is guided by components such as guide rollers to fully contact the sizing agent and be coated with a uniform sizing layer. The outlet zone 24 is located on the outlet side of the sizing tank and is used to collect the sizing agent after the sizing reaction. The outlet zone 24 is usually connected to the circulation pipe 72 so that the sizing agent can be transported back to the circulation unit 7 for reuse.

[0086] Under the action of the circulating pump 71, the sizing agent is drawn from the inlet zone 22 into the circulating pipe 72 and flows along the circulation loop to the outlet zone 24. Then, the sizing agent is drawn back into the inlet zone 22 by the circulating pump 71, forming a continuous circulation process. In this way, the sizing agent can be continuously circulated and reused in the sizing tank, thereby improving its utilization rate and uniformity.

[0087] The upper sizing tank 1 and all sub-sizing tanks 21 are equipped with feeding tanks for replenishing the corresponding sizing tanks. The liquid inlet area 22 of each sizing tank is connected to the feeding tank via a float valve. When the liquid level in the sizing tank drops, the float also drops, thereby opening the valve to allow liquid to flow in. When the liquid level rises to the set height, the float rises and closes the valve, stopping the replenishment, which can ensure that the liquid level in the tank is always kept within the set range. The float valve and the feeding tank are not shown in the figure.

[0088] In the embodiments of this utility model, a heating structure 8 for heating the temperature of the sizing agent is also included. The heating structure 8 includes a plurality of jackets 81 wrapped around the outside of the corresponding sizing tank.

[0089] In embodiments of this invention, all sub-sizing tanks 21 are equipped with a heating structure 8, or the upper sizing tank 1 and all sub-sizing tanks 21 are equipped with a heating structure 8. In the carbon fiber 9 sizing device, adding a heating structure 8 to control the temperature of the sizing agent is a crucial design element. The heating structure 8 specifically includes several jackets 81 wrapped around the outside of the corresponding sizing tank. This design aims to indirectly heat the sizing agent inside the sizing tank by heating the jackets 81, thereby ensuring that it is maintained within a suitable process temperature range.

[0090] The jacket 81 tightly wraps around the outside of the sizing tank and is typically made of a material with good thermal conductivity, such as stainless steel or titanium alloy, to ensure that heat can be effectively transferred from the outside to the inside of the sizing tank. The jacket 81 is usually filled with a heating medium, such as steam, hot oil, or hot water. This heating medium circulates under the drive of the heating system, transferring heat to the jacket 81 and the sizing agent within the sizing tank. To ensure that the sizing agent is maintained within a suitable temperature range, the heating structure 8 is typically equipped with a temperature control system. This system monitors the temperature inside the sizing tank using sensors and adjusts the temperature and flow rate of the heating medium according to a preset temperature range, thereby achieving precise control of the sizing agent temperature. The heating medium enters through the jacket inlet 811 and exits from the jacket 81 through the jacket outlet 812.

[0091] The jacket 81 is wrapped around the outside of the slurry tank. Specifically, the jacket 81 is wrapped around the bottom of the outside of the slurry tank. The jacket 81 may not be provided at the position where the circulation pipe 72 connects with the liquid inlet area 22 and the liquid outlet area 24.

[0092] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A carbon fiber sizing device, comprising an upper sizing tank, a lower sizing tank, and a conveying structure for sizing carbon fibers through the sizing tanks, characterized in that, The lower sizing tank has at least two independent sub-sizing tanks.

2. The sizing device according to claim 1, characterized in that, At least two sub-slurry tanks are arranged in a certain direction; The inlet and outlet sides of all sizing tanks are located on opposite sides of the sizing device.

3. The sizing device according to claim 2, characterized in that, There is a certain distance between two adjacent sub-slurry tanks.

4. The sizing device according to claim 3, characterized in that, The lower slurry tank is equipped with at least two baffles; At least two partitions divide the interior of the lower slurry tank into at least two sub-slurry tanks.

5. The sizing device according to claim 4, characterized in that, The lower slurry tank is equipped with two partitions arranged in a front-to-back direction and spaced apart; One partition forms a sub-sizing tank with the front side of the lower sizing tank, and another partition forms another sub-sizing tank with the rear side of the lower sizing tank. The inlet and outlet sides of all sizing tanks are located on the left and right sides of the sizing device, respectively.

6. The sizing device according to claim 5, characterized in that, The conveying structure includes an inlet roller, an outlet roller, and several conveying units that work in conjunction with the sizing trough for sizing. The inlet roller and outlet roller are respectively located on the inlet side and outlet side of all sizing tanks, and several conveying units share the inlet roller and outlet roller. The conveying unit includes several first guide rollers, wherein the two ends of the first guide rollers immersed in the sizing agent in the sizing tank are rotatably mounted on two partitions.

7. The sizing apparatus according to any one of claims 1-6, characterized in that, It also includes a drying structure for drying the sized carbon fibers. The drying structure includes a drying box with a drying channel inside for the carbon fibers to pass through, and electric heating wires are arranged around the drying channel.

8. The sizing device according to claim 7, characterized in that, The exterior of the drying chamber is equipped with multiple second guide rollers to guide the carbon fibers in and out of the drying channel multiple times.

9. The sizing apparatus according to any one of claims 1-6, characterized in that, It also includes several circulation units for the sizing agent in the sizing tank; The circulation unit includes a circulation pipe and a circulation pump connected in series with the circulation pipe; The sizing tank is divided into an inlet zone, a sizing zone, and an outlet zone from the inlet side to the outlet side. One end of the circulation pipe is connected to the liquid inlet area of ​​the slurry tank, and the other end is connected to the liquid outlet area of ​​the slurry tank.

10. The sizing apparatus according to any one of claims 1-6, characterized in that, It also includes a heating structure for heating the sizing agent, which includes several jackets wrapped around the outside of the corresponding sizing tank.

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