Filament dividing device and carbon fiber continuous production system

Abstract

The utility model relates to the technical field of carbon fiber production, and discloses a fiber separating device and a carbon fiber continuous production system. The silk separating device comprises a base and a plurality of silk separating comb teeth, a silk separating gap is formed between every two adjacent silk separating comb teeth, and the silk separating comb teeth are perpendicular to the base, rotationally arranged on the base and capable of moving in the length direction of the base. The carbon fiber continuous production system comprises the filament dividing device. Based on the fiber separating device, when fibers penetrate through the fiber separating gaps to be separated, friction between the fibers and the fiber separating comb teeth enables the comb teeth to rotate, so that damage to the fibers in the fiber separating process can be reduced, and when acting force between the fiber separating comb teeth and the fibers is large, the fibers can be separated from the fiber separating comb teeth. The filament separating comb teeth can move in the length direction of the base so as to adjust the size of the filament separating gap, reduce the acting force between the filament separating comb teeth and the fiber filaments, avoid large broken filaments and clamping breakage of filament bundles and ensure the finished product effect of the fiber filaments.

Description

Technical Field

[0001] This utility model relates to the field of carbon fiber production technology, specifically to a fiber splitting device and a continuous carbon fiber production system. Background Technology

[0002] Carbon fiber (CF) plays a crucial role in military, aerospace, and other fields due to its superior properties. With each new material, a new type of equipment is developed; as advanced weaponry advances, the demands on carbon fiber continue to rise, making ultra-high-performance carbon fiber a key competitive area. Currently, carbon fiber is widely used in military industry, rail transportation, wind power generation, and construction due to its excellent mechanical properties, corrosion resistance, and high-temperature resistance.

[0003] Carbon fiber can be prepared from a variety of different precursors, such as polyacrylonitrile, lignin, polyimide, mesophase pitch, and rayon. Currently, most carbon fibers used (approximately 95%) are made from polyacrylonitrile. The production process of carbon fiber mainly includes the following steps: carbon fiber precursor preparation, precursor pre-oxidation treatment, low-temperature carbonization of pre-oxidized fibers, high-temperature carbonization treatment, and winding. Each step directly determines the final properties of the carbon fiber.

[0004] Currently, the most common method for separating carbon fiber is mechanical. The basic principle of mechanical separation is to drive the fibers of the fiber bundle to separate gradually by providing a lateral force. However, the diameter of a single carbon fiber filament is only 6μm. During mechanical separation, due to the contact between the roller and the filament, there is a certain lateral friction. Although carbon fiber has very high longitudinal strength, it is very brittle in the transverse direction, and continuous contact can easily damage the fibers. Therefore, current separation methods have the problem of easily damaging or breaking the fibers. Utility Model Content

[0005] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this utility model provides a fiber splitting device and a continuous carbon fiber production system.

[0006] This utility model provides a fiber splitting device, including a base and a plurality of fiber splitting combs spaced apart on the base along the length direction of the base. A fiber splitting gap is formed between two adjacent fiber splitting combs, allowing the fiber to pass through. The fiber splitting combs are perpendicular to the base and rotatably disposed on the base, and the fiber splitting combs can move along the length direction of the base to adaptively adjust the size of the fiber splitting gap between two adjacent fiber splitting combs.

[0007] Optionally, the base is provided with a plurality of mounting holes for mounting the splitting comb teeth. The mounting holes include spherical holes and cylindrical holes that are interconnected. The splitting comb teeth include a spherical seat disposed in the spherical hole and a comb tooth body disposed on the spherical seat. The comb tooth body passes through the cylindrical hole, and a portion of the comb tooth body extends out of the cylindrical hole.

[0008] Optionally, the mounting hole is larger than the diameter of the comb teeth along the length of the base.

[0009] Optionally, an elastic layer is provided on the inner wall of the mounting hole, and the outer periphery of the filament comb teeth contacts the elastic layer.

[0010] Optionally, the base includes two interlocking seat bodies, which are symmetrically arranged along the axial direction of the comb teeth, and are connected by a connector.

[0011] Optionally, the connector includes a bolt, and the two seats are connected by the bolt after being fastened together.

[0012] Optionally, the length of the base is L, where L = (width of the carbonization furnace + 18cm) - (width of the carbonization furnace + 22cm);

[0013] And / or, the height of the base is H, wherein, A represents the K number of the fiber bundle.

[0014] Optionally, the size of the filament separation gap between two adjacent filament separation comb teeth is S, S = (X + 0.5 mm) - (X + 2 mm), where X = number of filament bundles * diameter of carbon fiber / 28 (mm);

[0015] And / or, the diameter of the comb teeth is 2-3 mm.

[0016] Optionally, the wire splitting device further includes a bracket for mounting the base, the bracket being configured to adjust the position of the base in the vertical direction.

[0017] This invention also provides a continuous carbon fiber production system, including the aforementioned fiber splitting device.

[0018] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0019] Based on the fiber splitting device provided by this utility model, when the fiber passes through the splitting gap for splitting, the friction between the fiber and the splitting comb teeth will cause the comb teeth to rotate, thereby reducing the damage to the fiber during the splitting process. Moreover, when the force between the splitting comb teeth and the fiber is large, the splitting comb teeth can move along the length direction of the base to adaptively adjust the size of the splitting gap between two adjacent splitting comb teeth, reduce the force between the splitting comb teeth and the fiber, avoid large fuzzy strands and breakage of the fiber bundle, reduce material waste, and ensure the finished product effect of the fiber. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the wire splitting device according to an embodiment of the present invention;

[0023] Figure 2 This is a front view of the wire splitting device according to an embodiment of the present invention;

[0024] Figure 3 This is a top view of the wire splitting device according to an embodiment of the present invention;

[0025] Figure 4 This is a cross-sectional view of the wire splitting device according to an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures

[0027] 1. Base; 11. Seat body; 12. Opening; 2. Dividing comb teeth; 21. Spherical seat; 22. Comb tooth body; 3. Dividing gap. Detailed Implementation

[0028] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments and features of this utility model can be combined with each other.

[0029] The following description sets forth many specific details to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments described in the specification are only some embodiments of the present invention, and not all embodiments.

[0030] Combination Figures 1 to 4 As shown, the fiber splitting device provided in this embodiment of the invention includes a base 1 and a plurality of fiber splitting comb teeth 2 spaced apart along the length of the base 1. A fiber splitting gap 3 is formed between adjacent comb teeth 2, allowing fiber filaments to pass through. Multiple fiber filaments can sequentially pass through the multiple fiber splitting gaps 3, resulting in a sequential arrangement for fiber splitting. In this case, fiber filaments pass through both sides of each comb tooth 2. Alternatively, multiple fiber filaments can pass through the multiple fiber splitting gaps 3 at intervals, i.e., multiple fiber filaments are arranged at intervals for fiber splitting, with one fiber splitting gap 3 left between adjacent fiber filaments, so that each pair of adjacent comb teeth 2 contacts one fiber filament, ensuring the rotation effect of the comb teeth 2. It can be seen that the specific fiber threading method can be selected according to actual needs. The fiber splitting comb teeth 2 are perpendicular to the base 1 and rotatably mounted on the base 1, so that when the fiber filaments pass through, the comb teeth 2 can rotate relative to the fiber filaments under the action of friction, avoiding hard contact between the comb teeth 2 and the fiber filaments. Furthermore, the splitting comb 2 can move along the length direction of the base 1 to adaptively adjust the size of the splitting gap 3 between two adjacent splitting combs 2. That is, when the force exerted on the splitting comb 2 by the fiber passing through the splitting gap 3 is large, the splitting comb 2 can move under the push of the fiber to increase the size of the splitting gap 3 and avoid the phenomenon of excessive force damaging the fiber.

[0031] Based on the fiber separating device provided by this utility model, when the fiber passes through the separating gap 3 for separating, the friction between the fiber and the separating comb 2 causes the comb to rotate, thereby reducing damage to the fiber during the separating process. Furthermore, when the force between the separating comb 2 and the fiber is large, the separating comb 2 can move along the length of the base 1 to adaptively adjust the size of the separating gap 3 between two adjacent separating comb 2, reducing the force between the separating comb 2 and the fiber, avoiding large fuzzy strands and breakage of the fiber bundle, reducing material waste, and ensuring the finished product quality of the fiber. In addition, it can also prevent damage to the fiber separating device, protect operators, improve product quality, and reduce production costs.

[0032] The fiber splitting device of this application is used for splitting carbon fibers, and the applicable carbon fibers include, but are not limited to, polyacrylonitrile-based carbon fibers, pitch-based carbon fibers, viscose-based carbon fibers, etc. Furthermore, the fiber splitting device is applicable to carbon fiber production lines with fiber bundles ranging from 1K to 50K.

[0033] In some implementations, such as Figure 3As shown, the base 1 is provided with a plurality of mounting holes for mounting the splitting comb teeth 2. The mounting holes include spherical holes and cylindrical holes that are interconnected. The splitting comb teeth 2 include a spherical seat 21 disposed in the spherical hole and a comb tooth body 22 disposed on the spherical seat 21. The comb tooth body 22 passes through the cylindrical hole, and part of the comb tooth body 22 extends out of the cylindrical hole.

[0034] In this design, the filament comb 2 can be rotatably set in the mounting hole, and the position of the filament comb 2 in the direction perpendicular to the base 1 can be restricted through the cooperation between the spherical hole and the spherical seat 21, so as to avoid the phenomenon of the filament comb 2 detaching from the base 1.

[0035] In some embodiments, the size of the mounting hole along the length of the base 1 is larger than the diameter of the comb teeth 2.

[0036] This design allows the splitting comb 2 to move along the length of the base 1 within the mounting hole, thereby changing the size of the splitting gap 3 between two adjacent splitting comb teeth 2 and avoiding hard contact between the splitting comb teeth 2 and the fiber filaments.

[0037] In a further optimized configuration, when multiple fiber filaments are spaced apart on the fiber splitting gap 3 (i.e., one fiber filament is inserted every other fiber splitting gap 3), a resetting element is placed on the side of the mounting hole away from the fiber filament. This resetting element applies a force to the fiber splitting comb 2 in the direction of the fiber filament, ensuring that the comb 2 is pushed away from the fiber filament under pressure and returns to its original position under the action of the resetting element, thus ensuring the effective use of the comb 2. The resetting element can be a spring or a rubber plate, etc., and can be designed according to actual needs.

[0038] In some embodiments, an elastic layer is provided on the inner wall of the mounting hole, and the outer periphery of the comb teeth 2 contacts the elastic layer. The elastic layer can be made of materials such as elastic rubber, and can be selected according to actual needs.

[0039] In this design, the elastic layer can restrict the position of the splitting comb 2, preventing the splitting comb 2 from tilting. The design of the elastic layer allows the splitting comb 2 to move along the length of the base 1, ensuring that the splitting comb 2 can move away from the fiber under the compression of the fiber and can apply a force towards the fiber to the splitting comb 2, ensuring that the splitting comb 2 can move and reset.

[0040] In some implementations, combined Figure 1 and Figure 4 As shown, the base 1 includes two interlocking seat bodies 11. The two seat bodies 11 are symmetrically arranged along the axial direction of the comb teeth 2, and the two seat bodies 11 are connected by a connector.

[0041] In this design, each separated base 11 has a half-mounting hole, allowing the two bases 11 to form multiple mounting holes when snapped together. During installation, multiple filament comb teeth 2 are first placed on one base 11, and then the other base 11 is snapped together to complete the installation of the base 1 and the filament comb teeth 2, making the operation convenient. Furthermore, the snapped base 1 can be connected via connectors, ensuring the connection effect of the two bases 11 and the ease of assembly and disassembly.

[0042] In some implementations, there are multiple connectors, which are evenly distributed on the base 1 to ensure the connection effect.

[0043] In some embodiments, the connector includes a bolt, and the two seat bodies 11 are connected by bolts after being engaged. Specifically, one seat body 11 is fitted with a nut, and the other seat body 11 has a through hole through which the bolt thread passes, and the bolt is screwed into the nut through the through hole.

[0044] In some embodiments, the length of the base 1 is L, where L = (width of the carbonization furnace + 18cm) - (width of the carbonization furnace + 22cm).

[0045] In some embodiments, the height of the base 1 is H, wherein, A is the K number of the fiber bundle. Preferably,

[0046] The base 1 of this size meets the installation requirements of the splitting comb teeth 2.

[0047] In some embodiments, the spacing 3 between two adjacent splitting comb teeth 2 is S, where S = (X + 0.5 mm) - (X + 2 mm), and X = number of filament bundles * diameter of carbon fiber / 28 (mm). Preferably, S = (X + 1 mm) - (X + 1.4 mm), which can be designed according to the diameter of the carbon fiber to meet the splitting requirements of the carbon fiber.

[0048] In some embodiments, the diameter of the filament-splitting comb teeth 2 is 2-3 mm. This size allows the filament-splitting comb teeth 2 to be easily rotated and mounted on the base 1.

[0049] In some embodiments, the length of the splitting comb 2 inserted into the base 1 is about 3 / 4 of the height of the base 1, ensuring that the splitting comb 2 can rotate relative to the base 1.

[0050] In some embodiments, the filament separating device further includes a bracket for mounting the base 1, the bracket being configured to adjust the vertical position of the base 1. With this design, the vertical position of the base 1 can be adjusted via the bracket, thereby adjusting the height of the filament separating comb 2 to meet the filament separating requirements.

[0051] In some implementations, such as Figure 4 As shown, the base 1 has an opening 12 along the vertical direction, and a telescopic rod is provided on the bracket. The output end of the telescopic rod passes through the opening 12 and is fixedly connected to the opening 12, so that the base 1 can be moved along the vertical direction by the extension and retraction of the telescopic rod, thereby increasing the convenience of operation. The telescopic rod can be a cylinder, hydraulic cylinder, or electric push rod, etc., which can be selected according to actual needs.

[0052] The fiber splitting device of this application adopts a split base 1 and a bracket design, which facilitates the disassembly and adjustment of the fiber splitting device and can be used for continuous production of carbon fiber.

[0053] This utility model also provides a continuous carbon fiber production system, including the aforementioned fiber splitting device. The fiber splitting device here includes all the technical features of the aforementioned fiber splitting device, and will not be described in detail here. In use, the continuous carbon fiber production system first splits the fibers by weft winding, and then the fibers pass through the fiber splitting device to the winding area. Specifically, before fiber splitting, the fibers undergo 1-7 weft winding processes. During the carbon fiber preparation process, the sized and dried carbon fibers need to be split before winding. After splitting by the fiber splitting device, carbon fibers with a lower batch-to-batch total denier CV can be obtained; specifically, the batch-to-batch total denier CV value is ≤1.5%.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0055] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this utility model. Therefore, this utility model is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features of the utility model described herein.

Claims

1. A fiber splitting device, characterized in that, The device includes a base (1) and a plurality of filament-splitting comb teeth (2) spaced apart on the base (1) along the length direction of the base (1). A filament-splitting gap (3) is formed between two adjacent filament-splitting comb teeth (2) to allow the filaments to pass through. The filament-splitting comb teeth (2) are perpendicular to the base (1) and rotatably disposed on the base (1). The filament-splitting comb teeth (2) are movable along the length direction of the base (1) to adaptively adjust the size of the filament-splitting gap (3) between two adjacent filament-splitting comb teeth (2).

2. The fiber splitting device according to claim 1, characterized in that, The base (1) is provided with a plurality of mounting holes for mounting the splitting comb teeth (2). The mounting holes include spherical holes and cylindrical holes that are interconnected. The splitting comb teeth (2) include a spherical seat (21) disposed in the spherical hole and a comb tooth body (22) disposed on the spherical seat (21). The comb tooth body (22) passes through the cylindrical hole, and a portion of the comb tooth body (22) extends out of the cylindrical hole.

3. The fiber splitting device according to claim 2, characterized in that, The mounting hole is larger than the diameter of the comb teeth (2) along the length of the base (1).

4. The fiber splitting device according to claim 2, characterized in that, An elastic layer is provided on the inner wall of the mounting hole, and the outer periphery of the splitting comb (2) is in contact with the elastic layer.

5. The fiber splitting device according to claim 1, characterized in that, The base (1) includes two interlocking seat bodies (11), which are symmetrically arranged along the axis of the comb teeth (2) and connected by a connector.

6. The fiber splitting device according to claim 5, characterized in that, The connector includes bolts, and the two seats (11) are connected by the bolts after being fastened together.

7. The fiber splitting device according to claim 1, characterized in that, The length of the base (1) is L, where L = (width of carbonization furnace + 18cm) - (width of carbonization furnace + 22cm); And / or, the height of the base (1) is H, wherein, A represents the K number of the fiber bundle.

8. The fiber splitting device according to claim 1, characterized in that, The size of the filament separation gap (3) between two adjacent filament separation comb teeth (2) is S, S=(X+0.5mm)-(X+2mm), where X=number of filament bundles*diameter of carbon fiber / 28(mm); And / or, the diameter of the filament comb (2) is 2-3 mm.

9. The fiber splitting device according to any one of claims 1 to 8, characterized in that, The wire splitting device also includes a bracket for mounting the base (1), the bracket being configured to adjust the position of the base (1) in the vertical direction.

10. A continuous carbon fiber production system, characterized in that, Includes the wire splitting device as described in any one of claims 1 to 9.

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