Carbon fiber long fiber manufacturing equipment and process

Abstract

The invention relates to the technical field of carbon fiber production, in particular to long carbon fiber manufacturing equipment and process. The carbon fiber long fiber manufacturing equipment comprises a conveying mechanism used for conveying carbon fibers, a desizing mechanism, a drying mechanism, a plasma treatment mechanism and a coating mechanism are sequentially arranged in the conveying direction of the conveying mechanism, the desizing mechanism is used for desizing the surfaces of the carbon fibers through a desizing solution, the drying mechanism is used for drying the desized carbon fibers, and the plasma treatment mechanism is used for coating the carbon fibers. The plasma treatment mechanism is used for generating micro-grains and bulges on the surface of the carbon fiber by spraying plasma; the coating mechanism is used for forming a polymer coating on the surface of the carbon fiber with the micro-grains and the bulges through a coating solution; the carbon fiber long fiber manufacturing process comprises the following steps: a desizing process, a plasma treatment process and a surface coating process. According to the invention, the problems of poor surface treatment effect, low use performance and short service life of the existing produced carbon fiber are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of carbon fiber production, and particularly relates to a carbon fiber long fiber manufacturing equipment and process. BACKGROUND

[0002] Carbon fiber material is widely used in aerospace, automobile, ship and other fields due to its light weight, high specific strength and high specific stiffness. With the continuous progress of domestic and foreign carbon fiber production technology, the high-performance carbon fiber industry has become relatively mature today. The developed carbon fiber has extremely strong tensile strength. The carbon fiber also has good low-temperature resistance and high-temperature resistance, and is not affected in deep cold environment or in hot conditions. At the same time, the carbon fiber has thermal conductivity and electrical conductivity, small thermal expansion coefficient, high stability and corrosion resistance. When preparing carbon fiber composite materials, the body structure is easy to bend and has good processing performance, so different shaped components can be made, the forming method is simple, the original structure performance can be maintained, and different product requirements can be met.

[0003] The patent document with the patent number CN114196164A discloses a carbon fiber composite material after plasma treatment and static self-assembly and a preparation method thereof, which specifically comprises the following steps: a high-energy plasma is generated by an plasma generator under the action of a power supply, ammonia gas is introduced into an atmosphere bin by a working gas generator, nitrogen atoms are directionally coated on the surface of carbon fibers in the form of nitrogen-containing groups by a dielectric barrier discharge mechanism between the plasma generators, then the carbon fibers and graphene oxide respectively undergo ionization and hydrolysis to generate heterogeneous charges, and the static self-assembly is performed under the action of electrostatic attraction to enhance the carbon fibers, and a reinforced composite material with good interface performance is obtained by combining with epoxy resin. The reinforced composite material of the present application enhances the interface bonding performance between the composite materials by plasma treatment of the carbon fiber / graphene oxide static self-assembly, thereby improving the comprehensive performance of the composite material.

[0004] However, in the actual production process, the inventors found that the existing drawn carbon fiber long fibers need surface treatment to improve the performance of the carbon fiber. The existing carbon fiber surface treatment methods include polymer coating treatment method and plasma treatment method, etc. The surface of the drawn carbon fiber long fiber is in a turbostratic graphite structure, is smooth and inert, and cannot realize good wetting and bonding with the polymer matrix, which ultimately affects the interface performance and overall performance of the composite material, reduces the effect of the polymer coating treatment method, and the treatment effect of the carbon fiber long fiber treated by the plasma treatment method decays with the extension of the storage time, that is, the plasma treatment has a time effect, which affects the service life of the carbon fiber. SUMMARY

[0005] The purpose of this invention is to address the shortcomings of existing technologies. By incorporating a plasma treatment mechanism to treat the surface of carbon fibers on a conveying mechanism, the surface active groups are increased, improving surface properties. This, combined with a coating mechanism, forms a coating on the carbon fiber surface. The sizing process is rapid and efficient, resulting in good coating adhesion, improved surface properties and wettability, and extended service life. Simultaneously, a desizing and drying mechanism further desizing the carbon fibers prevents residual sizing material from affecting the surface treatment process. The plasma treatment is uniform, resulting in a uniform coating. This solves the problems of poor surface treatment, low performance, and short service life of carbon fibers produced in existing methods.

[0006] To address the above technical problems, the following technical solution is adopted: A carbon fiber long fiber manufacturing equipment, comprising: The conveying mechanism for conveying carbon fibers includes, in sequence along the conveying direction, a desizing mechanism, a drying mechanism, a plasma treatment mechanism, and a coating mechanism. The desizing mechanism is used to desizing the surface of the carbon fibers with a desizing solution. The drying mechanism is used to dry the desizing carbon fibers. The plasma treatment mechanism is used to generate micro-textures and protrusions on the surface of the carbon fibers by spraying plasma. The coating mechanism is used to form a polymer coating on the surface of the carbon fibers with micro-textures and protrusions using a coating solution. The plasma processing mechanism includes a processing chamber, a plasma generating component disposed within the processing chamber, an inlet component disposed on the processing chamber for introducing protective gas to protect the plasma generated by the plasma generating component, and a venting component disposed within the processing chamber for introducing the gas introduced by the inlet component into the bottom of the desizing mechanism and the coating mechanism.

[0007] Preferably, both the desizing mechanism and the coating mechanism include a solution chamber located outside the processing room, a stirring assembly located inside the solution chamber, and a regulating assembly located on the solution chamber for adjusting the solution concentration and internal air pressure inside the solution chamber.

[0008] Preferably, the stirring assembly includes a plurality of rotating shafts spaced apart and rotatably disposed at the bottom of the solution chamber, and a plurality of stirring blades equally spaced on the rotating shafts.

[0009] Preferably, the ventilation assembly includes an air inlet channel formed in the rotating shaft, an air outlet channel disposed on the stirring blade and connected to the air inlet channel, and a ventilation pipe with both ends connected to the air inlet channel and the processing chamber, respectively.

[0010] As preferred, the adjusting assembly comprises an adjusting chamber arranged outside the solution chamber and used for adjusting the concentration of the solution, a liquid outlet pipe communicated between the adjusting chamber and the solution chamber and used for adjusting the concentration of the solution, a negative pressure pipe arranged above the inside of the solution chamber and used for sucking the adjusted solution in the adjusting chamber into the solution chamber, and an exhaust pipe communicated with the upper end of the adjusting chamber, when the surface of the solution in the solution chamber is lower than the liquid outlet pipe, the gas in the solution chamber enters the adjusting chamber and is exhausted through the exhaust pipe.

[0011] As preferred, the plasma generating assembly comprises a support frame arranged in the processing chamber, a mounting base rotatably arranged on the support frame, a processing channel coaxially formed on the mounting base and used for the carbon fiber to pass through, a plurality of generating cavities equidistantly formed on the inner wall of the mounting base along the circumference of the processing channel and used for generating plasma, a rod-shaped cathode coaxially arranged in the generating cavity and having a tapered structure at the end, and an anode nozzle arranged on the inner wall of the generating cavity and used for generating plasma in cooperation with the rod-shaped cathode.

[0012] As preferred, the feeding assembly comprises a feeding cavity formed between the support frame and the mounting base and communicated with the generating cavities, a feeding channel formed on the support frame and communicated with one end of the feeding cavity, and a feeding pipeline communicated with the other end of the feeding channel and used for feeding the protective gas, and the plurality of generating cavities are all inclined structures inclined to the same direction, so that the protective gas is forced to rotate the mounting base when the protective gas is exhausted through the generating cavities.

[0013] As preferred, the conveying mechanism comprises an input roller arranged outside the desizing mechanism and used for supporting the carbon fiber roll, a plurality of first conveying rollers arranged in the desizing mechanism and the coating mechanism and used for supporting the carbon fiber into the solution, a plurality of second conveying rollers arranged in the drying mechanism, a supporting assembly arranged in the plasma mechanism and used for staggered supporting a plurality of carbon fibers, a plurality of conveying pipelines communicated with each mechanism along the conveying direction of the carbon fiber, and a winding roller arranged outside the drying mechanism and used for winding the processed carbon fiber.

[0014] As preferred, the supporting assembly comprises a plurality of first supporting rollers arranged on both sides of the processing chamber and used for supporting the carbon fiber to the plasma generating assembly, a plurality of second supporting rollers arranged in a spaced manner perpendicular to the conveying direction of the carbon fiber and used for upwardly supporting the carbon fiber, and a plurality of third supporting rollers arranged between adjacent two second supporting rollers and used for downwardly supporting the carbon fiber, and the plurality of second supporting rollers and the third supporting rollers are sequentially and spacedly arranged along the conveying direction of the carbon fiber.

[0015] The application also provides a carbon fiber long fiber manufacturing process based on the above carbon fiber long fiber manufacturing device, comprising the following steps: Step one: desizing process, the carbon fiber is conveyed to the desizing mechanism through the conveying mechanism, and then is conveyed to the drying mechanism for drying after desizing; Step two: plasma treatment process, the dried carbon fiber is conveyed to the treatment chamber, under the protection of the protective gas introduced by the gas inlet assembly, the plasma generated by the plasma generating assembly treats the surface of the carbon fiber to produce micro lines and protrusions, and the introduced gas is discharged in time through the gas inlet assembly to ensure the air pressure in the treatment chamber, and aeration is formed in the desizing mechanism and the coating mechanism; Step three: coating process, the carbon fiber with micro lines and protrusions is conveyed to the coating mechanism to form a polymer coating on the surface of the carbon fiber, and then the coated carbon fiber reenters the desizing mechanism and the drying mechanism for secondary desizing, and the secondary desized carbon fiber is wound.

[0016] The application has the following advantages: (1) In the application, the surface of the carbon fiber on the conveying mechanism is treated by the plasma treatment mechanism, so that the surface active groups increase, the surface properties are improved, and then the coating mechanism forms a coating on the surface of the carbon fiber, the bonding effect of the coating is good, the surface properties and wettability are improved, the service life is improved, and the desizing mechanism and the drying mechanism are used before surface treatment to desize the carbon fiber, so that the influence of the residual original sizing on the surface treatment during production is avoided, the plasma treatment effect is good and uniform, the coating is uniform, the whole treatment process has high automation degree, the production efficiency is high, in addition, the gas inlet assembly cooperates with the plasma generating assembly in the process of surface treatment, the treatment effect of the plasma is further improved under the protection of the protective gas, and the protective gas is introduced into the desizing mechanism and the coating mechanism by the gas inlet assembly to form aeration, so that the solution has good flowability, the desizing speed of the desizing mechanism and the coating speed of the coating mechanism are improved; (2) The present application is provided with the air pipe and the air inlet channel in the rotating shaft, the protective gas in the processing chamber is discharged through the air outlet channel in the stirring blade, the aeration is uniformly formed at the bottom of the solution chamber with the rotation of the stirring blade, the aeration effect is improved, the combination of the stirring blade and the aeration greatly improves the stirring effect, further improves the fluidity of the solution, further improves the desizing speed of the desizing mechanism and the coating speed of the coating mechanism, and the air pressure is formed in the solution chamber after the aeration, so that the low concentration solution is automatically extruded into the adjusting chamber through the liquid outlet pipe, and then the solution with adjusted concentration is sucked back into the solution chamber through the negative pressure pipe, and when the solution surface in the solution chamber is lower than the liquid outlet pipe, the gas in the solution chamber enters the adjusting chamber and is discharged through the exhaust pipe, the use rate and effect of the protective gas are improved, the structure is simple and ingenious, and the use is convenient; (3) The present application is provided with the air pipe and the air inlet channel in the rotating shaft, the protective gas in the processing chamber is discharged through the air outlet channel in the stirring blade, the aeration is uniformly formed at the bottom of the solution chamber with the rotation of the stirring blade, the aeration effect is improved, the combination of the stirring blade and the aeration greatly improves the stirring effect, further improves the fluidity of the solution, further improves the desizing speed of the desizing mechanism and the coating speed of the coating mechanism, and the air pressure is formed in the solution chamber after the aeration, so that the low concentration solution is automatically extruded into the adjusting chamber through the liquid outlet pipe, and then the solution with adjusted concentration is sucked back into the solution chamber through the negative pressure pipe, and when the solution surface in the solution chamber is lower than the liquid outlet pipe, the gas in the solution chamber enters the adjusting chamber and is discharged through the exhaust pipe, the use rate and effect of the protective gas are improved, the structure is simple and ingenious, and the use is convenient; In summary, the device has the advantages of improving the surface treatment effect, use performance and service life of the produced carbon fiber, and is especially suitable for the technical field of carbon fiber production. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0018] Figure 1 A perspective view of a carbon fiber long fiber manufacturing device is provided.

[0019] Figure 2 A sectional view of a carbon fiber long fiber manufacturing device is provided. Figure 3 A perspective sectional view of a plasma treatment mechanism is provided.

[0020] Figure 4Provided by the present invention Figure 3 A magnified view of a portion of point A in the middle.

[0021] Figure 5 This is a top view of the plasma generating assembly provided by the present invention.

[0022] Figure 6 Provided by the present invention Figure 5 Sectional view at point B along the middle.

[0023] Figure 7 Provided by the present invention Figure 5 Sectional view at point C along the middle.

[0024] Figure 8 This is a three-dimensional sectional view of the desizing mechanism provided by the present invention.

[0025] Figure 9 Provided by the present invention Figure 8 A magnified view of a section at point D.

[0026] Figure 10 A cross-sectional view of the stirring assembly provided by the present invention.

[0027] Figure 11 This is a cross-sectional view of the desizing mechanism provided by the present invention.

[0028] Figure 12 Adjustment process diagram of the adjustment component provided by the present invention Figure 13 A process flow diagram of a carbon fiber long fiber manufacturing process provided by the present invention. Detailed Implementation

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0030] Example 1 like Figures 1-3 As shown, a carbon fiber long fiber manufacturing device includes: The conveying mechanism 1 for conveying carbon fibers is provided with a desizing mechanism 2, a drying mechanism 3, a plasma treatment mechanism 4 and a coating mechanism 5 in sequence along the conveying direction of the conveying mechanism 1. The desizing mechanism 2 is used to desizing the surface of the carbon fibers with a desizing solution. The drying mechanism 3 is used to dry the carbon fibers after desizing. The plasma treatment mechanism 4 is used to generate micro-textures and protrusions on the surface of the carbon fibers by spraying plasma. The coating mechanism 5 is used to form a polymer coating on the surface of the carbon fibers with micro-textures and protrusions by coating solution. The plasma processing unit 4 includes a processing chamber 41, a plasma generating component 42 disposed in the processing chamber 41, an inlet component 43 disposed on the processing chamber 41 for introducing protective gas to protect the plasma generated by the plasma generating component 42, and a venting component 44 disposed in the processing chamber 41 for introducing the gas introduced by the inlet component 43 into the bottom of the desizing mechanism 2 and the coating mechanism 5.

[0031] In this embodiment, the surface of the carbon fiber on the conveying mechanism 1 is treated by setting up a plasma treatment mechanism 4, which increases the number of surface active groups and improves the surface properties. Then, a coating is formed on the surface of the carbon fiber in conjunction with the coating mechanism 5. The coating has a good bonding effect. At the same time, before the surface treatment, the desizing mechanism 2 and the drying mechanism 3 are used to desizing the carbon fiber to avoid the original slurry remaining on the surface of the carbon fiber during production from affecting the surface treatment. In addition, during the surface treatment process, the inlet component 43 works in conjunction with the plasma generating component 42 to improve the plasma treatment effect under the protection of protective gas. The aeration component 44 introduces the protective gas into the desizing mechanism 2 and the coating mechanism 5 to form aeration, which makes the solution flow well.

[0032] In detail, firstly, the carbon fiber is sequentially conveyed through the conveying mechanism 1 to the desizing mechanism 2 and the drying mechanism 3 for desizing and drying, and then conveyed to the treatment chamber 41. Next, under the protection of the protective gas, the carbon fiber surface is plasma treated by the inlet component 43 and the plasma generating component 42 to produce micro-textures and protrusions. The introduced gas is promptly introduced into the desizing mechanism 2 and the coating mechanism 5 through the ventilation component 44 to form aeration, improve the solution treatment effect, and ensure the air pressure in the treatment chamber 41. Then, the carbon fiber with micro-textures and protrusions is conveyed to the coating mechanism 5 to form a polymer coating on the carbon fiber surface. Finally, the coated carbon fiber re-enters the desizing mechanism 2 and the drying mechanism 3 for secondary desizing, and then the carbon fiber with secondary desizing is wound up.

[0033] It should be noted that the protective gas can be nitrogen to protect the environment of the entire surface treatment process; in addition, the drying mechanism 3 adopts low-temperature drying, and its own technology and installation method are existing technologies, which will not be described in detail here.

[0034] Furthermore, such as Figures 1-2 as well as Figure 8 As shown, both the desizing mechanism 2 and the coating mechanism 5 include a solution chamber 21 located outside the treatment chamber 41, a stirring assembly 22 located inside the solution chamber 21, and a regulating assembly 23 located on the solution chamber 21 for regulating the solution concentration and internal air pressure inside the solution chamber 21.

[0035] In the embodiment, the stirring assembly 22 is arranged to further improve the flowability of the solution in the desizing mechanism 2 and the coating mechanism 5, and to improve the desizing speed of the desizing mechanism 2 and the coating speed of the coating mechanism 5. In addition, the adjusting assembly 23 is arranged to adjust the concentration of the solution and the internal air pressure, so as to ensure the desizing effect of the desizing mechanism 2 and the sizing effect of the coating mechanism 5, and to ensure the smoothness of the internal air flow of the air inlet assembly 43 and the air inlet assembly 44.

[0036] Further, as shown in Figure 3 and Figures 8-10 , the stirring assembly 22 comprises a plurality of rotating shafts 221 arranged at intervals on the bottom of the solution chamber 21 and a plurality of stirring blades 222 arranged at intervals on the rotating shafts 221.

[0037] In the embodiment, the rotating shafts 221 drive the stirring blades 222 to rotate, so as to realize the stirring function.

[0038] It should be noted that the rotating directions of the adjacent two rotating shafts 221 are opposite, so that the stirring blades 222 disturb each other when stirring, so as to avoid large fluctuations on the surface of the solution, and to affect the desizing efficiency and the adjusting function of the adjusting assembly 23.

[0039] Further, as shown in Figures 1-3 and Figures 8-10 , the air inlet assembly 44 comprises an air inlet passage 441 formed in the rotating shaft 221, an air outlet passage 442 arranged on the stirring blade 222 and communicated with the air inlet passage 441, and an air inlet pipe 443 communicated with the air inlet passage 441 and the treatment chamber 41 at two ends.

[0040] In the embodiment, the air inlet pipe 443, the air inlet passage 441 and the air outlet passage 442 are sequentially communicated, so that the gas is aerated with the rotation of the stirring blade 222, the aeration effect is improved, and the flowability of the solution is further improved.

[0041] It should be noted that the air inlet passage 441 penetrates to the outside of the rotating shaft 221, and the air inlet pipe 443 is communicated with the air inlet passage 441 on the rotating shaft 221 through a rotating joint, so as to avoid interfering with the rotation of the rotating shaft 221.

[0042] Further, as shown in Figures 11-12As shown, the regulating component 23 includes a regulating chamber 231 located outside the solution chamber 21 for regulating the solution concentration, an outlet pipe 232 connected to the regulating chamber 231 and the solution chamber 21 and cooperating with the venting component 44 to introduce gas to form a gas pressure that squeezes out the solution in the solution chamber 21, a negative pressure pipe 233 located inside and above the solution chamber 21 for drawing the regulated solution in the regulating chamber 231 into the solution chamber 21, and an exhaust pipe 234 connected to the upper end of the regulating chamber 231. When the solution surface in the solution chamber 21 is lower than the outlet pipe 232, the gas in the solution chamber 21 enters the regulating chamber 231 and is discharged through the exhaust pipe 234.

[0043] In this embodiment, by setting the gas pressure formed by the liquid outlet pipe 232 and the ventilation component 44, the low concentration solution in the solution chamber 21 automatically flows into the regulating chamber 231 for adjustment, and the high pressure gas automatically flows into the regulating chamber 231 and is discharged through the exhaust pipe 234 for adjustment. At the same time, the negative pressure pipe 233 is used to draw the solution after the concentration is adjusted back into the solution chamber 21 to mix with the low concentration solution, thereby ensuring the concentration of the solution in the solution chamber 21.

[0044] It should be noted that the outlet end of the negative pressure pipe 233 is equipped with a nozzle 235 to spray the solution after concentration adjustment evenly into the solution chamber 21; the protective gas discharged from the exhaust pipe 234 can be collected and reused, saving energy and reducing emissions; in addition, the structure of how to add raw materials to the adjustment chamber 231 to adjust the solution concentration is existing technology and is not shown in the attached figure, so it will not be described in detail here.

[0045] Furthermore, such as Figures 3-7 As shown, the plasma generating assembly 42 includes a support frame 421 disposed in the processing chamber 41, a mounting base 422 rotatably disposed on the support frame 421, a processing channel 423 coaxially formed on the mounting base 422 for passing through carbon fibers, a plurality of generating chambers 424 formed at equal intervals along the circumference of the processing channel 423 on the inner wall of the mounting base 422 for generating plasma, a rod-shaped cathode 425 coaxially disposed in the generating chamber 424 and having a conical end structure, and an anode nozzle 426 disposed on the inner wall of the generating chamber 424 and cooperating with the rod-shaped cathode 425 to generate plasma.

[0046] In this embodiment, by setting a support frame 421 to support the rotating mounting base 422, the plasma formed between the rod-shaped cathode 425 and the anode nozzle 426 in the generating chamber 424 is uniformly treated on the carbon fiber surface in the treatment channel 423 under the rotation of the mounting base 422, resulting in more comprehensive treatment and better treatment effect.

[0047] It should be noted that the number of plasma generating assemblies 42 is multiple and is arranged at equal intervals along the conveying direction of the carbon fibers, so that the carbon fiber surface is more fully treated by plasma; in addition, the rod-shaped cathode 425 and the anode nozzle 426 are prior art in terms of their own and the mounting method, and will not be described in detail here.

[0048] Further, as shown in Figures 3-7 the input assembly 43 includes an input cavity 431 formed between the support frame 421 and the mounting seat 422 and communicating with the generating cavity 424, an input passage 432 formed on the support frame 421 and communicating with one end of the input cavity 431, and an input pipeline 433 communicating with the other end of the input passage 432 and used for inputting the protective gas, and the plurality of generating cavities 424 are all inclined structures inclined in the same direction, so that the protective gas is forced to rotate the mounting seat 422 when it is discharged through the generating cavity 424.

[0049] In this embodiment, by arranging the input pipeline 433, the input passage 432, the input cavity 431 and the generating cavity 424 in sequence, the protective gas inputted through the generating cavity 424 is made to carry plasma by the rod-shaped cathode 425 and the anode nozzle 426, so that the plasma is sprayed onto the carbon fibers together with the protective gas, and the protective gas is sprayed while assisted by the inclined generating cavity 424, so that the protective gas can automatically drive the mounting seat 422 to rotate, which is ingenious in structure and convenient to use.

[0050] It should be noted that the air pipe 443, the negative pressure pipe 233 and the input pipeline 433 all form negative pressure through the negative pressure device, which are prior art in terms of their own and the mounting method, and will not be described in detail here.

[0051] Further, as shown in Figures 1-4 and Figure 9 the conveying mechanism 1 includes an input roller 11 arranged outside the desizing mechanism 2 and used for supporting the carbon fiber roll, a plurality of first conveying rollers 12 arranged inside the desizing mechanism 2 and the coating mechanism 5 and used for supporting the carbon fibers into the solution, a plurality of second conveying rollers 13 arranged inside the drying mechanism 3, a supporting assembly 14 arranged inside the plasma mechanism and used for supporting a plurality of carbon fibers, a plurality of conveying pipelines 15 communicating with each mechanism along the conveying direction of the carbon fibers, and a winding roller 16 arranged outside the drying mechanism 3 and used for winding the treated carbon fibers.

[0052] In the embodiment, the input roller 11, the first conveying roller 12, the second conveying roller 13, the conveying pipe 15 and the winding roller 16 are arranged to realize the winding of the carbon fibers after the positioning and conveying treatment between the mechanisms, realize the automatic production, improve the surface treatment effect of the carbon fibers, and meanwhile, the support assembly 14 is arranged to support the multiple horizontally conveyed carbon fibers, so that the shielding phenomenon between the carbon fibers is avoided, and the treatment effect of the plasma treatment mechanism 4 is affected.

[0053] It should be noted that the first conveying roller 12 in the desizing mechanism 2 and the second conveying roller in the drying mechanism 3 are both provided with two conveying grooves 121 at intervals, so that the carbon fibers subjected to the first desizing and the second desizing are separated, interference is avoided, and production is facilitated.

[0054] Further, as shown in Figures 2-4 the support assembly 14 includes multiple first support rollers 141 arranged on both sides of the treatment chamber 41 and used for supporting the carbon fibers to the plasma generating assembly 42, multiple second support rollers 142 arranged at intervals along the direction perpendicular to the conveying direction of the carbon fibers and used for supporting the carbon fibers upward, and multiple third support rollers 143 arranged between the adjacent two second support rollers 142 and used for supporting the carbon fibers downward, and the multiple second support rollers 142 and the multiple third support rollers 143 are arranged at intervals along the conveying direction of the carbon fibers.

[0055] In the embodiment, the first support roller 141 is arranged to position the conveying direction of the carbon fibers and the position of the plasma generating assembly 42, and the multiple second support rollers 142 and the multiple third support rollers 143 are arranged to support the multiple carbon fibers in a specific direction, so that the positions of the multiple carbon fibers supported are different, and the shielding phenomenon is avoided, and the surface treatment effect is improved.

[0056] It should be noted that the number of the second support rollers 142 and / or the third support rollers 143 is multiple sets and is arranged at intervals along the conveying direction of the carbon fibers, the supporting effect is improved, and the multiple plasma generating assemblies 42 are matched, so that the plasma treatment of the surface of the carbon fibers is more comprehensive.

[0057] Embodiment Two As shown in Figures 1-2 and Figure 13 The application further provides a carbon fiber long fiber manufacturing process based on the above-mentioned carbon fiber long fiber manufacturing device, which includes the following steps: Step one: desizing process, after the carbon fibers are conveyed into the desizing mechanism 2 by the conveying mechanism 1 for desizing, the carbon fibers are conveyed into the drying mechanism 3 for drying; Step two: the plasma processing procedure, the dried carbon fiber is conveyed into the processing chamber 41, under the protection of the protective gas in the gas inlet assembly 43, the plasma generated by the plasma generating assembly 42 is used to process the surface of the carbon fiber to generate micro lines and protrusions, and the gas is discharged in time through the air inlet assembly 44 to ensure the air pressure in the processing chamber 41, and at the same time, the aeration is formed in the desizing mechanism 2 and the coating mechanism 5; Step three: coating procedure, the carbon fiber with micro lines and protrusions is conveyed into the coating mechanism 5 to form a polymer coating on the surface of the carbon fiber, and then the carbon fiber with the coating is sequentially re-entered into the desizing mechanism 2 and the drying mechanism 3 for secondary desizing, and the carbon fiber after secondary desizing is wound up.

[0058] In the description of the present application, it should be understood that the terms "front and back", "left and right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or component referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0059] Of course, in the present technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0060] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or replacements easily thought of by those skilled in the art under the technical hints of the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A carbon fiber long fiber manufacturing apparatus characterized by comprising: The application relates to a carbon fiber processing device. The device comprises a conveying mechanism (1) for conveying carbon fibers, a desizing mechanism (2), a drying mechanism (3), a plasma processing mechanism (4) and a coating mechanism (5) arranged in sequence along the conveying direction of the conveying mechanism (1), the desizing mechanism (2) is used for desizing treatment of the surface of the carbon fibers by using a desizing solution, the drying mechanism (3) is used for drying the desized carbon fibers, the plasma processing mechanism (4) is used for generating micro lines and protrusions on the surface of the carbon fibers by spraying plasma, and the coating mechanism (5) is used for forming a polymer coating on the surface of the carbon fibers with the micro lines and protrusions by using a coating solution. The plasma processing mechanism (4) comprises a processing chamber (41), a plasma generating assembly (42) arranged in the processing chamber (41), an inlet assembly (43) arranged on the processing chamber (41) and used for introducing protective gas to protect the plasma generated by the plasma generating assembly (42), and an air inlet assembly (44) arranged on the processing chamber (41) and used for introducing the gas introduced by the inlet assembly (43) into the bottom of the desizing mechanism (2) and the coating mechanism (5).

2. The carbon fiber long fiber manufacturing apparatus according to claim 1, wherein The desizing mechanism (2) and the coating mechanism (5) each comprise a solution chamber (21) arranged outside the processing chamber (41), a stirring assembly (22) arranged in the solution chamber (21), and an adjusting assembly (23) arranged on the solution chamber (21) and used for adjusting the solution concentration and the internal air pressure of the solution chamber (21).

3. The carbon fiber long fiber manufacturing apparatus according to claim 2, wherein The stirring assembly (22) comprises a plurality of rotating shafts (221) arranged at intervals and on the bottom of the solution chamber (21), and a plurality of stirring blades (222) arranged at intervals on the rotating shafts (221).

4. The carbon fiber long fiber manufacturing apparatus according to claim 3, wherein The air inlet assembly (44) comprises an air inlet channel (441) formed in the rotating shaft (221), an air outlet channel (442) arranged on the stirring blade (222) and communicated with the air inlet channel (441), and an air inlet pipe (443) communicated with the air inlet channel (441) and the processing chamber (41) at two ends.

5. The carbon fiber long fiber manufacturing apparatus according to claim 2, wherein The adjusting assembly (23) comprises an adjusting chamber (231) arranged outside the solution chamber (21) and used for adjusting the solution concentration, an outlet pipe (232) communicated with the adjusting chamber (231) and the solution chamber (21) and used for extruding the solution in the solution chamber (21) by air pressure formed by the air inlet assembly (44) when the solution in the solution chamber (21) is introduced, a negative pressure pipe (233) arranged above the inside of the solution chamber (21) and used for pumping the adjusted solution in the adjusting chamber (231) into the solution chamber (21), and an exhaust pipe (234) communicated with the upper end of the adjusting chamber (231), when the surface of the solution in the solution chamber (21) is lower than the outlet pipe (232), the gas in the solution chamber (21) enters the adjusting chamber (231) and is discharged through the exhaust pipe (234).

6. The carbon fiber long fiber manufacturing apparatus according to claim 1, wherein The plasma generating assembly (42) comprises a support frame (421) arranged in the processing chamber (41), a mounting base (422) rotatably arranged on the support frame (421), a processing channel (423) coaxially formed on the mounting base (422) and used for passing the carbon fibers, a plurality of generating cavities (424) equidistantly arranged on the inner wall of the mounting base (422) along the circumference of the processing channel (423) and used for generating plasma, a rod-shaped cathode (425) coaxially arranged in the generating cavity (424) and having a tapered structure at the end, and an anode nozzle (426) arranged on the inner wall of the generating cavity (424) and cooperating with the rod-shaped cathode (425) to generate plasma.

7. The carbon fiber long fiber manufacturing apparatus according to claim 6, wherein The feeding assembly (43) comprises a feeding cavity (431) formed between the support frame (421) and the mounting base (422) and communicated with the generating cavities (424), a feeding channel (432) formed on the support frame (421) and communicated at one end with the feeding cavity (431), and a feeding pipeline (433) communicated at the other end with the feeding channel (432) and used for feeding the protective gas, and the plurality of generating cavities (424) are all inclined structures inclined to the same direction, so that the protective gas is forced to rotate the mounting base (422) when being discharged through the generating cavities (424).

8. The carbon fiber long fiber manufacturing apparatus according to claim 1, wherein The conveying mechanism (1) comprises an input roller (11) arranged outside the desizing mechanism (2) and used for supporting the carbon fiber roll, a plurality of first conveying rollers (12) arranged in the desizing mechanism (2) and the coating mechanism (5) and used for supporting the carbon fibers into the solution, a plurality of second conveying rollers (13) arranged in the drying mechanism (3), a supporting assembly (14) arranged in the plasma mechanism and used for staggered supporting a plurality of carbon fibers, a plurality of conveying pipelines (15) communicated with each mechanism along the conveying direction of the carbon fibers, and a winding roller (16) arranged outside the drying mechanism (3) and used for winding the processed carbon fibers.

9. The carbon fiber long fiber manufacturing apparatus according to claim 8, wherein The supporting assembly (14) comprises a plurality of first supporting rollers (141) arranged on both sides of the processing chamber (41) and used for supporting the carbon fibers to the plasma generating assembly (42), a plurality of second supporting rollers (142) arranged at intervals along the vertical direction of the conveying direction of the carbon fibers and used for upwardly supporting the carbon fibers, and a plurality of third supporting rollers (143) arranged between adjacent two second supporting rollers (142) and used for downwardly supporting the carbon fibers, and the plurality of second supporting rollers (142) and the third supporting rollers (143) are arranged at intervals along the conveying direction of the carbon fibers.

10. A carbon fiber long fiber manufacturing process based on the carbon fiber long fiber manufacturing apparatus according to any one of claims 1 to 9, characterized by, The method comprises the following steps: Step one: desizing process, after the carbon fibers are conveyed into the desizing mechanism (2) through the conveying mechanism (1) to be desized, the carbon fibers are conveyed into the drying mechanism (3) to be dried; Step two: the plasma processing procedure, the dried carbon fiber is transmitted into the processing chamber (41), under the protection of the protective gas which is transmitted by the gas transmission assembly (43), the plasma generated by the plasma generating assembly (42) processes the surface of the carbon fiber to generate micro-lines and protrusions, and the transmitted gas is discharged in time through the gas discharge assembly (44) to ensure the air pressure in the processing chamber (41), and at the same time, aeration is formed in the desizing mechanism (2) and the coating mechanism (5); Step three: the coating procedure, the carbon fiber with micro-lines and protrusions is transmitted into the coating mechanism (5) to form a polymer coating on the surface of the carbon fiber, and then the carbon fiber with the coating is sequentially transmitted into the desizing mechanism (2) and the drying mechanism (3) for secondary desizing, and the carbon fiber after secondary desizing is wound up.

Images