Device and method for determining dispersity of long carbon fiber tows

Abstract

The invention relates to a device and a method for determining dispersity of long carbon fiber tows. The device comprises an infiltration device which is provided with an infiltration tank, the infiltration tank is used for accommodating a dispersion solvent, the bottom wall of the infiltration tank is provided with a test area, and the test area is divided into a plurality of test grids with the same size; the first wire guide assembly is arranged in the infiltration tank and located on the upstream side of the test area in the advancing direction of the long carbon fiber tows, and the first wire guide assembly is used for enabling the long carbon fiber tows penetrating through the first wire guide assembly to be infiltrated through the dispersion solvent in the infiltration tank; the second wire guide assembly is arranged in the infiltration tank and located on the downstream side of the test area in the advancing direction of the long carbon fiber tows; and the winding device is arranged on the infiltration device, is located on the downstream side of the second wire guide assembly in the advancing direction of the long carbon fiber tows, and is used for winding the long carbon fiber tows sequentially penetrating through the first wire guide assembly and the second wire guide assembly.

Description

Technical Field

[0001] The present disclosure relates to the field of carbon fiber technology, and in particular to a device and method for determining the dispersion of long carbon fiber tows. Background Art

[0002] The dispersion of carbon fiber tows refers to the degree of uniform distribution in the matrix material (resin, metal, ceramic). Good dispersion means that the carbon fiber tows can be distributed in the matrix in a uniform, non-agglomerated state, thereby maximizing their reinforcement effect. Therefore, it is very important to determine the dispersion of carbon fiber tows. Carbon fiber tows can be divided into long carbon fiber tows and short carbon fiber tows. Short carbon fiber tows are mainly used in the field of concrete materials, while long carbon fiber tows are mainly used in the field of carbon core cables, wind turbine blades and other fields. The dispersion of short carbon fiber tows can be determined by automatic image recognition methods. Due to the long length of long carbon fiber tows, automatic image recognition cannot be used to determine the dispersion of long carbon fiber tows.

[0003] Therefore, how to find a device to determine the dispersion of long carbon fiber tows is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0004] To overcome the problems existing in the related art, the present disclosure provides an apparatus and method for determining the dispersion of long carbon fiber tows.

[0005] According to a first aspect of an embodiment of the present disclosure, there is provided an apparatus for determining the dispersion of a long carbon fiber tow, the apparatus for determining the dispersion of a long carbon fiber tow comprising:

[0006] An infiltration device is provided with an infiltration tank for containing a dispersed solvent, a bottom wall of the infiltration tank is provided with a test area, and the test area is divided into a plurality of test grids of the same size;

[0007] a first guide wire assembly disposed in the impregnation tank and positioned upstream of the test area along a direction in which the long carbon fiber tow travels, the first guide wire assembly being configured to allow the long carbon fiber tow traveling through the first guide wire assembly to be impregnated with the dispersed solvent in the impregnation tank;

[0008] a second guide wire assembly disposed in the impregnation tank and located downstream of the test area along the traveling direction of the long carbon fiber tow;

[0009] a winding device, disposed on the impregnation device and located downstream of the second guide wire assembly in the direction of travel of the long carbon fiber tow, the winding device being used to wind up the long carbon fiber tow that passes through the first guide wire assembly and the second guide wire assembly in sequence;

[0010] The long carbon fiber tow can be dispersed in the second guide wire assembly and cooperate with the test area to determine the dispersibility of the long carbon fiber tow.

[0011] In some embodiments of the present disclosure, the first guide wire assembly includes a plurality of first guide wire rollers sequentially arranged along the traveling direction of the long carbon fiber tow, and the heights of the plurality of first guide wire rollers are all lower than the height of the dispersion solvent.

[0012] In some embodiments of the present disclosure, the plurality of first godet rollers include a first sub-goat roller, a second sub-goat roller, a third sub-goat roller, a fourth sub-goat roller, and a fifth sub-goat roller, which are sequentially arranged along the traveling direction of the long carbon fiber tow;

[0013] The long carbon fiber tow passes along the bottom of the first sub-godnet roller, the top of the second sub-godnet roller, the bottom of the third sub-godnet roller, the top of the fourth sub-godnet roller, and the bottom of the fifth sub-godnet roller in sequence, and is wound onto the winding device after passing through the second guide assembly.

[0014] In some embodiments of the present disclosure, the heights of the first sub-goat roller, the third sub-goat roller, and the fifth sub-goat roller are first heights, the heights of the second sub-goat roller and the fourth sub-goat roller are second heights, and the first height is lower than the second height.

[0015] In some embodiments of the present disclosure, the second guidewire assembly includes at least one second guidewire roller, the height of the second guidewire roller is higher than the height of the first guidewire roller, and the smoothness of the second guidewire roller is higher than the smoothness of the first guidewire roller;

[0016] The long carbon fiber tow passes along the bottom of the fifth sub-goiter roller and the top of the second goiter roller in sequence and is then wound onto the winding device.

[0017] In some embodiments of the present disclosure, the winding device includes:

[0018] a transmission roller, the transmission roller being fixedly connected to the first end of the long carbon fiber tow;

[0019] A drive motor is electrically connected to the transmission roller, and the drive motor is used to drive the transmission roller to rotate so as to reel in the long carbon fiber tow and disperse the long carbon fiber tow along the axial direction of the transmission roller.

[0020] In some embodiments of the present disclosure, the apparatus for determining the dispersion of the long carbon fiber tow further comprises:

[0021] An unwinding device is located on the upstream side of the impregnation device along the traveling direction of the long carbon fiber tow, and is used to unwind the long carbon fiber tow.

[0022] According to a second aspect of an embodiment of the present disclosure, a method for determining the dispersion of a long carbon fiber tow is provided, which is applied to the above-mentioned apparatus for determining the dispersion of a long carbon fiber tow, and the method comprises:

[0023] Controlling the winding device to wind the long carbon fiber tow so that the long carbon fiber tow passes through the first guide wire assembly and the second guide wire assembly in sequence, and the long carbon fiber tow can be dispersed in the second guide wire assembly;

[0024] determining first dispersion data of the long carbon fiber tow, wherein the first dispersion data is used to characterize the dispersion of the long carbon fiber tow at a first preset tension;

[0025] determining second dispersion data of the long carbon fiber tow, wherein the second dispersion data is used to characterize the dispersion of the long carbon fiber tow at a second preset tension;

[0026] determining the dispersibility of the long carbon fiber tow based on the first dispersion data and the second dispersion data;

[0027] Wherein, the first preset tension is greater than the second preset tension.

[0028] In some embodiments of the present disclosure, determining the first dispersion data of the long carbon fiber tow includes:

[0029] Under the condition that the expanded width of the long carbon fiber tow located at the second guide wire assembly remains unchanged, the first dispersion data is determined according to the first expanded width of the long carbon fiber tow located at the second guide wire assembly.

[0030] In some embodiments of the present disclosure, determining the second dispersion data of the long carbon fiber tow includes:

[0031] determining first sub-dispersion data according to a second unfolded width of the long carbon fiber tow located on the test area when the long carbon fiber tow is completely separated from the first guide wire assembly;

[0032] determining second sub-dispersion data based on a dispersion area of ​​the long carbon fiber tow located on the test area;

[0033] The second scatter data is determined according to the first sub-scatter data and the second sub-scatter data.

[0034] The technical solutions provided by the embodiments of the present disclosure may have the following beneficial effects:

[0035] Since the long carbon fiber tow can be dispersed in the second guide wire assembly, during the winding process of the long carbon fiber tow, the dispersion of the long carbon fiber tow can be determined based on the degree of dispersion of the long carbon fiber tow in the test area and the second guide wire assembly, thereby improving the reliability of determining the dispersion of the long carbon fiber tow.

[0036] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0038] Figure 1 is a perspective structural diagram of an apparatus for determining the dispersion of long carbon fiber tows at a first viewing angle according to an exemplary embodiment;

[0039] Figure 2 is a perspective structural diagram of an apparatus for determining the dispersion of long carbon fiber tows at a second viewing angle according to an exemplary embodiment;

[0040] Figure 3 is a schematic diagram showing a long carbon fiber tow being wound along a transmission roller according to an exemplary embodiment;

[0041] Figure 4 is a schematic flow chart of a method for determining the dispersion of long carbon fiber tows according to an exemplary embodiment;

[0042] Figure 5 is a schematic flow chart of a method for determining the dispersion of long carbon fiber tows according to another exemplary embodiment;

[0043] Figure 6 is a schematic flow chart of a method for determining the dispersion of long carbon fiber tows according to another exemplary embodiment.

[0044] In the picture:

[0045] 10. Wetting device; 11. Testing area; 20. First guide wire assembly; 21. First sub-guide wire roller; 21. First sub-guide wire roller; 22. Second sub-guide wire roller; 23. Third sub-guide wire roller; 24. Fourth sub-guide wire roller; 25. Fifth sub-guide wire roller; 30. Second guide wire assembly; 40. Winding device; 41. Drive roller; 42. Drive motor; 50. Unwinding device; T-long carbon fiber tow. DETAILED DESCRIPTION

[0046] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, like numbers in different figures represent like or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0047] The dispersion of carbon fiber tows refers to the degree of uniform distribution in the matrix material (resin, metal, ceramic). Good dispersion means that the carbon fiber tows can be distributed in the matrix in a uniform, non-agglomerated state, thereby maximizing their reinforcement effect. Therefore, it is very important to determine the dispersion of carbon fiber tows. Carbon fiber tows can be divided into long carbon fiber tows and short carbon fiber tows. Short carbon fiber tows are mainly used in the field of concrete materials, while long carbon fiber tows are mainly used in the field of carbon core cables, wind turbine blades and other fields. The dispersion of short carbon fiber tows can be determined by automatic image recognition methods. For example, short carbon fiber tows can be quickly separated by ultrasound, vibration and other methods. However, if this method is used to determine the dispersion of long carbon fibers, the long carbon fiber tows will be disordered, and the long carbon fibers will be mixed unclearly, making it difficult to determine their dispersion.

[0048] Based on this, the present disclosure provides a device for determining the dispersion of long carbon fiber tows. Since the long carbon fiber tows can be dispersed in the second guide wire assembly, during the winding process of the long carbon fiber tows, the dispersion of the long carbon fiber tows can be determined according to the degree of dispersion of the long carbon fiber tows in the test area and the second guide wire assembly, thereby improving the reliability of determining the dispersion of the long carbon fiber tows.

[0049] The present disclosure provides an apparatus for determining the dispersion of long carbon fiber tows. Figure 1 and Figure 2As shown, the device for determining the dispersibility of the long carbon fiber bundle includes an impregnation device 10, a first guide wire assembly 20, a second guide wire assembly 30 and a winding device 40. The impregnation device 10 is provided with an impregnation tank, which is used to accommodate a dispersion solvent. The bottom wall of the impregnation tank is provided with a test area 11, and the test area 11 is divided into a plurality of test grids of the same size. The first guide wire assembly 20 is provided in the impregnation tank, and along the direction of travel of the long carbon fiber bundle T, the first guide wire assembly 20 is located on the upstream side of the test area 11. The first guide wire assembly 20 is used to impregnate the long carbon fiber bundle T passing through the first guide wire assembly 20 with the dispersion solvent in the impregnation tank. The second guide wire assembly 30 is provided in the impregnation tank, and along the direction of travel of the long carbon fiber bundle T, the second guide wire assembly 30 is located on the downstream side of the test area 11. The winding device 40 is provided in the impregnation device and is located downstream of the second guide wire assembly 30 along the direction of travel of the long carbon fiber tow T. The winding device 40 is used to wind up the long carbon fiber tow T that passes through the first guide wire assembly and the second guide wire assembly in sequence. The long carbon fiber tow T can be dispersed in the second guide wire assembly 30 and cooperate with the test area 11 to determine the dispersion of the long carbon fiber tow T.

[0050] In this embodiment, during the winding process, after the long carbon fiber tow is soaked in the first guide wire assembly, it will sequentially pass through the test grid in the test area and the second guide wire assembly before being wound into the winding device. Because the first guide wire assembly can soak the long carbon fiber tow with the dispersing solvent, the winding device and the second guide wire assembly can disperse the long carbon fiber tow without causing the carbon fiber tows to become entangled with each other. The dispersion of the long carbon fiber tow can be determined based on the degree of dispersion of the long carbon fiber tow in the test area and the second guide wire assembly, thereby improving the reliability of determining the dispersion of the long carbon fiber tow.

[0051] Exemplarily, the immersion device 10 may include a trough structure or a box structure. When the immersion device 10 includes a box structure, a hole may be opened at the top of the box structure to form the trough structure. The test area 11 may include 16 test grids (4 rows and 4 columns), 20 test grids (4 rows and 5 columns), 25 test grids (5 rows and 5 columns), and 36 test grids (6 rows and 6 columns), etc. The minimum division value of the test grid size may be millimeters.

[0052] Exemplarily, the winding device 40 and the second guide wire assembly 30 can be used to unfold the long carbon fiber tow T, and the dispersion of the long carbon fiber tow T can be determined based on the dispersion degree of the long carbon fiber tow T on the second guide wire assembly 30 and in the test area 11 at the initial moment, and the dispersion degree of the long carbon fiber tow on the second guide wire assembly 30 and the dispersion degree of the long carbon fiber tow T in the test area 11 after winding for a period of time.

[0053] In one embodiment, the first guide wire assembly 20 includes a plurality of first guide wire rollers sequentially arranged along the traveling direction of the long carbon fiber tow T, and the heights of the plurality of first guide wire rollers are all lower than the height of the dispersion solvent.

[0054] In this embodiment, by providing multiple first godet rollers, the multiple first godet rollers can support the long carbon fiber tows, thereby improving the reliability of the dispersion test. Furthermore, by setting the height of the multiple first godet rollers lower than the height of the dispersion solvent, the long carbon fiber tows provided on the first godet rollers can be fully impregnated, thereby improving the reliability of the long carbon fiber tows being fully impregnated.

[0055] Exemplarily, the height of the top of each of the first godet rollers is lower than the height of the dispersion solvent.

[0056] In one embodiment, Figure 1 and Figure 2 As shown, the plurality of first godet rollers include a first sub-godet roller 21, a second sub-godet roller 22, a third sub-godet roller 23, a fourth sub-godet roller 24, and a fifth sub-godet roller 25, which are sequentially arranged along the traveling direction of the long carbon fiber tow T. The long carbon fiber tow T passes sequentially along the bottom of the first sub-godet roller 21, the top of the second sub-godet roller 22, the bottom of the third sub-godet roller 23, the top of the fourth sub-godet roller 24, and the bottom of the fifth sub-godet roller 25, and is wound up to the winding device 40 after passing through the second godet assembly 30.

[0057] In this embodiment, by setting up multiple guide rollers, the long carbon fiber tow can pass through the bottom of the first sub-guide roller, the top of the second sub-guide roller, the bottom of the third sub-guide roller, the top of the fourth sub-guide roller, and the bottom of the fifth sub-guide roller in sequence to pass through the second guide assembly. Since the height of the first guide roller is lower than the dispersed solvent, the long carbon fiber can be fully soaked multiple times in the process of passing from the first sub-guide roller to the fifth sub-guide roller, thereby improving the reliability of the long carbon fiber tow being soaked.

[0058] The heights of the first sub-goat roller 21 , the second sub-goat roller 22 , the third sub-goat roller 23 , the fourth sub-goat roller 24 and the fifth sub-goat roller 25 may be the same or different.

[0059] In one embodiment, Figure 2 As shown, the heights of the first sub-goat roller 21, the third sub-goat roller 23 and the fifth sub-goat roller 25 are the first height, and the heights of the second sub-goat roller 22 and the fourth sub-goat roller 24 are the second height, and the first height is lower than the second height.

[0060] In this embodiment, since the heights of the first to fifth sub-godet rollers are all lower than the height of the dispersion solvent, by setting the heights of adjacent sub-godet rollers to be different, the long carbon fiber tows will be fully soaked by the dispersion solvent at a height higher than the sub-godet rollers when passing from the lower sub-godet rollers to the higher sub-godet rollers, or from the higher sub-godet rollers to the lower sub-godet rollers, further improving the reliability of the soaking of the long carbon fiber tows.

[0061] In one embodiment, Figure 2 As shown, the second godet assembly 30 includes at least one second godet roller, which is taller than the first godet roller and smoother than the first godet roller. The long carbon fiber tow T sequentially passes along the bottom of the fifth sub-godet roller 25 and the top of the second godet roller before being wound up into the winding device.

[0062] In this embodiment, since the height of the second godet roller is higher than that of the first godet roller, the impregnated long carbon fiber tow can be dispersed on the second godet roller under the action of the winding device. When the width of the long carbon fiber tow on the second godet roller no longer changes, the difference between the width of the long carbon fiber tow on the second godet roller and the initial width of the long carbon fiber tow on the second godet roller can be used to determine the dispersion of the long carbon fiber tow under a certain tension. Moreover, since the smoothness of the second godet roller is lower than that of the first godet roller, the first godet roller will apply tension to the long carbon fiber tow to promote the dispersion of the long carbon fiber tow passing through the second godet roller. At the same time, when the end of the long carbon fiber tow detaches from the first godet roller, the winding device can be controlled to stop winding. The dispersion of the long carbon fiber tow under no tension can be determined by measuring the width and area of ​​the long carbon fiber tow in the test area. Based on the dispersion of the long carbon fiber tow under a certain tension and without tension, the dispersion of the carbon fiber tow can be comprehensively determined, thereby improving the reliability of the device.

[0063] For example, the initial width of the long carbon fiber tow on the second godet is W1. When the width of the long carbon fiber tow on the second godet is W2 and does not change, the dispersion is related to W2-W1. The width can be determined by multiple test grids.

[0064] In one embodiment, Figure 1 and Figure 2 As shown, the winding device 40 includes a drive roller 41 and a drive motor 42. The drive roller 41 is fixedly connected to the first end of the long carbon fiber tow T. The drive motor 42 is electrically connected to the drive roller 41 and is used to drive the drive roller 41 to rotate to wind the long carbon fiber tow T and disperse the long carbon fiber tow T along the axial direction of the drive roller 41.

[0065] In this embodiment, since the driving motor drives the transmission roller to rotate, the long carbon fiber bundle can be dispersed along the axial direction of the rotating shaft, so that when the long carbon fiber bundle is wound, the long carbon fiber bundle passing through the second guide roller can be dispersed, thereby improving the reliability of the dispersed carbon fiber bundle.

[0066] For example, Figure 3 As shown, when the driving motor 42 drives the transmission roller 41 to rotate, the long carbon fiber tows T can be wound along the two ends of the transmission roller 41 so that the long carbon fiber tows T are dispersed.

[0067] In one embodiment, if Figure 2 As shown, the device for determining the dispersion of the long carbon fiber tow further includes an unwinding device 50. The unwinding device 50 is located upstream of the impregnation device 10 along the traveling direction of the long carbon fiber tow T. The unwinding device 50 is used to unwind the long carbon fiber tow T.

[0068] In this embodiment, since the unwinding device is used to wind the long carbon fiber tow, the unwinding device can be provided to fix the long carbon fiber tow, thereby preventing the long carbon fiber tow from becoming tangled and affecting the determination of dispersion.

[0069] Exemplarily, the second end of the long carbon fiber tow T is wound around the unwinding device 50 .

[0070] An exemplary embodiment of the present disclosure provides a method for determining the dispersion of a long carbon fiber tow, which is applied to the above-mentioned apparatus for determining the dispersion of a long carbon fiber tow, such as Figure 4 As shown, the method for determining the dispersion of long carbon fiber tows includes the following steps:

[0071] S100, controlling the winding device to wind up the long carbon fiber tow so that the long carbon fiber tow passes through the first guide wire assembly and the second guide wire assembly in sequence, and the long carbon fiber tow can be dispersed in the second guide wire assembly.

[0072] In this step, the winding device is controlled to wind up the long carbon fiber tow, that is, the driving motor 42 is controlled to start, so that the long carbon fiber tow can be wound along the transmission roller 41 .

[0073] S200: Determine first dispersion data of the long carbon fiber tow, where the first dispersion data is used to characterize the dispersion of the long carbon fiber tow at a first preset tension.

[0074] S300: Determine second dispersion data of the long carbon fiber tow, where the second dispersion data is used to characterize the dispersion of the long carbon fiber tow at a second preset tension.

[0075] S400: Determine the dispersion of the long carbon fiber tow based on the first dispersion data and the second dispersion data.

[0076] In this step, weights can be assigned to the first and second dispersion data, respectively. For example, if the first dispersion data is A and the second dispersion data is B, a first weight value K1 is assigned to the first dispersion data, and a second weight value K2 is assigned to the second dispersion data, resulting in a dispersion Z = K1*A+K2*B. When the dispersion Z is greater than the critical dispersion C, the dispersion is determined to meet the requirements. For example, different long carbon fiber tows can have different first and second weight values ​​and different critical dispersions.

[0077] The first preset tension is greater than the second preset tension.

[0078] In this embodiment, a winding device is controlled to wind a long carbon fiber tow so that the long carbon fiber tow passes sequentially through a first guide wire assembly and a second guide wire assembly. The long carbon fiber tow is dispersed in the second guide wire assembly, so that the long carbon fiber tow can disperse in the second guide wire assembly after being impregnated. First dispersion data of the long carbon fiber tow is determined. The first dispersion data is used to characterize the dispersion of the long carbon fiber tow at a first preset tension, thereby determining the dispersion of the long carbon fiber tow corresponding to the first preset tension. The dispersion of the long carbon fiber tow is determined based on the first dispersion data and the second dispersion data, thereby determining the dispersion of the long carbon fiber tow corresponding to the second preset tension. The dispersion of the long carbon fiber tow is determined based on the first dispersion data and the second dispersion data, thereby determining the dispersion of the long carbon fiber tow according to different tensions. Because the long carbon fiber tow exhibits different dispersions under different tensions, the dispersion of the long carbon fiber tow can be comprehensively determined based on the corresponding dispersions of the same long carbon fiber tow under different tensions, thereby improving the reliability of the method for determining the dispersion of the long carbon fiber tow.

[0079] Exemplarily, the second preset tension may be 0.

[0080] In one embodiment, the first dispersion data of the long carbon fiber tow in step S200 is determined by:

[0081] When the expanded width of the long carbon fiber tow located at the second guide wire assembly remains unchanged, the first dispersion data is determined according to the first expanded width of the long carbon fiber tow located at the second guide wire assembly.

[0082] In this embodiment, when the expanded width of the long carbon fiber tow of the second guide wire assembly remains unchanged, the first expanded width can represent the maximum dispersion capacity of the long carbon fiber tow under the current tension. By determining the first dispersion data based on the first expanded width, the reliability of the first dispersion data is improved.

[0083] Illustratively, the first expanded width includes W2 - W1 mentioned above.

[0084] In one embodiment, if Figure 5As shown, the second dispersion data of the long carbon fiber tow in step S300 is determined by:

[0085] S310: When the long carbon fiber tow is completely separated from the first guide wire assembly, determine first sub-dispersion data according to a second unfolded width of the long carbon fiber tow located on the test area.

[0086] S320: Determine second sub-dispersion data according to the dispersion area of ​​the long carbon fiber tows located in the test area.

[0087] S330: Determine second scattered data according to the first sub-scattered data and the second sub-scattered data.

[0088] In this step, weights can be assigned to the first and second sub-dispersion data, respectively. For example, if the first sub-dispersion data is a and the second sub-dispersion data is b, a third weight k1 is assigned to the first sub-dispersion data, and a fourth weight k2 is assigned to the second sub-dispersion data, resulting in second dispersion data B = k1*a+k2*b. For example, the third and fourth weights can be different for different long carbon fiber tows.

[0089] In this embodiment, when the long carbon fiber tow is completely separated from the first guide wire assembly, the first sub-dispersion data is determined based on the second unfolded width of the long carbon fiber tow located on the test area to determine the dispersion width of the long carbon fiber tow when there is no tension in the long carbon fiber tow. The second sub-dispersion data is determined based on the dispersion area of ​​the long carbon fiber tow located on the test area to determine the dispersion area of ​​the long carbon fiber tow when there is no tension in the long carbon fiber tow. The second dispersion data is determined based on the first sub-dispersion data and the second sub-dispersion data to comprehensively determine the dispersion of the long carbon fiber tow in the absence of tension based on the dispersion width and the dispersion area. Since the dispersion of the long carbon fiber tow can be manifested in two aspects, the dispersion width and the dispersion area, the dispersion of the long carbon fiber tow in the absence of tension can be determined based on the dispersion width and the dispersion area, thereby improving the reliability of the second dispersion data.

[0090] For example, both the dispersion width and the dispersion area can be determined by testing a grid.

[0091] Exemplarily, in step S310, when the long carbon fiber tow is completely separated from the first guide wire assembly, determining the first sub-dispersion data according to the second unfolded width of the long carbon fiber tow located on the test area specifically includes the following steps:

[0092] When the long carbon fiber tow is completely separated from the first guide wire assembly, the winding device is controlled to stop winding so that the end of the long carbon fiber tow falls on the test area, and the first sub-dispersion data is determined based on the second unfolded width and dispersion area of ​​the long carbon fiber tow located on the test area.

[0093] Illustratively, the larger the first expanded width, the second expanded width, and the dispersion area, the better the dispersion of the long carbon fiber tows.

[0094] For example, after the dispersibility of the long carbon fiber tow is determined, if the dispersion performance does not meet the requirements, the dispersibility can be adjusted by adjusting the long carbon fiber tow and the dispersion solvent.

[0095] An exemplary embodiment of the present disclosure provides a method for determining the dispersion of long carbon fiber tows, such as Figure 6 As shown, the method for determining the dispersion of long carbon fiber tows includes the following steps:

[0096] S500: Control the winding device to wind up the long carbon fiber tow, so that the long carbon fiber tow passes through the first guide wire assembly and the second guide wire assembly in sequence, and the long carbon fiber tow can be dispersed in the second guide wire assembly.

[0097] S510: Determine first dispersion data according to a first expanded width of the long carbon fiber tow located in the second guide wire assembly when the expanded width of the long carbon fiber tow located in the second guide wire assembly remains unchanged.

[0098] S520: When the long carbon fiber tow is completely separated from the first guide wire assembly, the winding device is controlled to stop winding, and first sub-dispersion data is determined according to a second unfolded width of the long carbon fiber tow located on the test area.

[0099] S530: Determine second sub-dispersion data according to the dispersion area of ​​the long carbon fiber tows located in the test area.

[0100] S540: Determine second scattered data according to the first sub-scattered data and the second sub-scattered data.

[0101] S550: Determine the dispersion of the long carbon fiber tow based on the first dispersion data and the second dispersion data.

[0102] In this embodiment, the dispersion data corresponding to the same long carbon fiber tow under different tension conditions can be used to comprehensively determine the dispersion of the long carbon fiber tow, thereby improving the reliability of the method for determining the dispersion of the long carbon fiber tow.

[0103] The contents described above can be implemented individually or in combination in various ways, and these variations are all within the scope of protection of the present disclosure.

[0104] The present disclosure is described with reference to the flowcharts and / or block diagrams of the methods, apparatus (devices) and computer program products according to the embodiments of the present disclosure. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0105] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0106] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0107] In this disclosure, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that an article or device comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such article or device. In the absence of further limitations, an element defined by the phrase "comprising..." does not preclude the presence of additional identical elements in the article or device comprising the element.

[0108] Although the preferred embodiments of the present disclosure have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present disclosure.

[0109] Obviously, those skilled in the art may make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include such modifications and variations.

Claims

1. A device for determining the dispersion of long carbon fiber tows, characterized in that The apparatus for determining the dispersion of long carbon fiber tows comprises: An infiltration device is provided with an infiltration tank for containing a dispersed solvent, a bottom wall of the infiltration tank is provided with a test area, and the test area is divided into a plurality of test grids of the same size; a first guide wire assembly disposed in the impregnation tank and positioned upstream of the test area along a direction in which the long carbon fiber tow travels, the first guide wire assembly being configured to allow the long carbon fiber tow traveling through the first guide wire assembly to be impregnated with the dispersed solvent in the impregnation tank; a second guide wire assembly disposed in the impregnation tank and located downstream of the test area along the traveling direction of the long carbon fiber tow; a winding device, disposed on the impregnation device and located downstream of the second guide wire assembly in the direction of travel of the long carbon fiber tow, the winding device being used to wind up the long carbon fiber tow that passes through the first guide wire assembly and the second guide wire assembly in sequence; The long carbon fiber tow can be dispersed in the second guide wire assembly and cooperate with the test area to determine the dispersibility of the long carbon fiber tow.

2. The device for determining the dispersion of long carbon fiber tows according to claim 1, characterized in that The first guide wire assembly includes a plurality of first guide wire rollers sequentially arranged along the traveling direction of the long carbon fiber tow, and the heights of the plurality of first guide wire rollers are all lower than the height of the dispersion solvent.

3. The device for determining the dispersion of long carbon fiber tows according to claim 2, characterized in that The plurality of first godet rollers include a first sub-godet roller, a second sub-godet roller, a third sub-godet roller, a fourth sub-godet roller and a fifth sub-godet roller, which are sequentially arranged along the traveling direction of the long carbon fiber tow; The long carbon fiber tow passes along the bottom of the first sub-godnet roller, the top of the second sub-godnet roller, the bottom of the third sub-godnet roller, the top of the fourth sub-godnet roller, and the bottom of the fifth sub-godnet roller in sequence, and is wound onto the winding device after passing through the second guide assembly.

4. The device for determining the dispersion of long carbon fiber tows according to claim 3, characterized in that The heights of the first sub-goat roller, the third sub-goat roller and the fifth sub-goat roller are a first height, the heights of the second sub-goat roller and the fourth sub-goat roller are a second height, and the first height is lower than the second height.

5. The device for determining the dispersion of long carbon fiber tows according to claim 3, characterized in that The second guide wire assembly includes at least one second guide wire roller, the height of the second guide wire roller is higher than the height of the first guide wire roller, and the smoothness of the second guide wire roller is higher than the smoothness of the first guide wire roller; The long carbon fiber tow passes along the bottom of the fifth sub-goiter roller and the top of the second goiter roller in sequence and is then wound onto the winding device.

6. The device for determining the dispersion of long carbon fiber tows according to claim 1, characterized in that The winding device comprises: a transmission roller, the transmission roller being fixedly connected to the first end of the long carbon fiber tow; A drive motor is electrically connected to the transmission roller, and the drive motor is used to drive the transmission roller to rotate so as to reel in the long carbon fiber tow and disperse the long carbon fiber tow along the axial direction of the transmission roller.

7. The device for determining the dispersion of long carbon fiber tows according to any one of claims 1 to 6, characterized in that The apparatus for determining the dispersion of the long carbon fiber tow further comprises: An unwinding device is located on the upstream side of the impregnation device along the traveling direction of the long carbon fiber tow, and is used to unwind the long carbon fiber tow.

8. A method for determining the dispersion of long carbon fiber tows, applied to the device for determining the dispersion of long carbon fiber tows according to any one of claims 1 to 7, characterized in that: The method comprises: Controlling the winding device to wind the long carbon fiber tow so that the long carbon fiber tow passes through the first guide wire assembly and the second guide wire assembly in sequence, and the long carbon fiber tow can be dispersed in the second guide wire assembly; determining first dispersion data of the long carbon fiber tow, wherein the first dispersion data is used to characterize the dispersion of the long carbon fiber tow at a first preset tension; determining second dispersion data of the long carbon fiber tow, wherein the second dispersion data is used to characterize the dispersion of the long carbon fiber tow at a second preset tension; determining the dispersibility of the long carbon fiber tow based on the first dispersion data and the second dispersion data; Wherein, the first preset tension is greater than the second preset tension.

9. The method for determining the dispersion of long carbon fiber tows according to claim 8, characterized in that Determining first dispersion data of the long carbon fiber tow includes: Under the condition that the expanded width of the long carbon fiber tow located at the second guide wire assembly remains unchanged, the first dispersion data is determined according to the first expanded width of the long carbon fiber tow located at the second guide wire assembly.

10. The method for determining the dispersion of long carbon fiber tows according to claim 8, characterized in that Determining the second dispersion data of the long carbon fiber tow includes: determining first sub-dispersion data according to a second unfolded width of the long carbon fiber tow located on the test area when the long carbon fiber tow is completely separated from the first guide wire assembly; determining second sub-dispersion data based on a dispersion area of ​​the long carbon fiber tow located on the test area; The second scatter data is determined according to the first sub-scatter data and the second sub-scatter data.

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