A method and device for testing the wettability of resin to carbon fiber

Abstract

The present invention discloses a test method and a test device for the wettability of carbon fiber by resin, and belongs to the technical field of carbon fiber. The test device is used for the wettability test of the carbon fiber bundle to be tested under the condition of natural rotation tension and / or rotation external force tension, and comprises: a workbench, a left support assembly, a right support assembly and a drive assembly. The top surface of the workbench is a horizontal work surface; the left support assembly is arranged on the work surface; the left support assembly has one or two left circular cake members; the right support assembly is arranged on the work surface and is parallel to the left support assembly; the right support assembly has one or two right circular cake members; the drive assembly is transmission-connected with the right circular cake member to drive the right circular cake member to rotate. The test method is implemented based on the aforementioned test device. The present invention can realize wettability tests under various dynamic conditions, provide wettability test data of more angles, further enhance the reference of the wettability test data, and make up for the limitations of the data in simple static tests.

Description

Technical Field

[0001] The invention relates to the technical field of carbon fiber, and in particular to a method and a device for testing the wettability of a resin on carbon fiber. Background Art

[0002] Carbon fiber is a high-strength, high-modulus special fiber with a carbon content of more than 95%. It is widely used in the molding of resin-based carbon fiber reinforced composite materials. Among them, resin transfer molding, vacuum infusion and other molding methods have high requirements on the resin impregnation speed of carbon fiber. Therefore, the speed of resin impregnation of carbon fiber has an important influence on these molding methods and determines the performance of the final composite material.

[0003] At present, there is no unified testing standard for the test method of the speed of resin impregnation of carbon fiber, and most tests are designed by users themselves.

[0004] Chinese invention application (name: "Testing method for the speed of resin impregnating carbon fiber", publication number: CN118376540A, publication date: 20240723) A testing method for the speed of resin impregnating carbon fiber, the testing method comprising: tensioning both ends of a single bundle of carbon fibers, and fixing at least one end of the single bundle of carbon fibers on a paper fixed on a horizontal surface; dripping a preset volume of resin onto the single bundle of carbon fibers at a preset height suspended directly above the single bundle of carbon fibers, and removing the single bundle of carbon fibers after standing for a preset period of time; measuring the length of the trace left on the paper after the resin impregnates the single bundle of carbon fibers; and determining the speed of the resin impregnating the carbon fibers according to the length of the trace.

[0005] However, during the molding process of carbon fiber and resin, the torsion of the carbon fiber itself and the friction between the carbon fibers will have a certain impact on the infiltration process of the carbon fiber and the resin. However, the above test methods do not involve this, and they are more about the infiltration effect of the carbon fiber under static conditions. The relevant test data may have certain limitations. Summary of the invention

[0006] The present invention aims to provide a test method and a test device for the wettability of carbon fiber by resin, which can realize wettability testing under various dynamic conditions, provide wettability test data from more angles, further enhance the reference value of the wettability test data, and make up for the limitations of the data in simple static testing.

[0007] The technical solution adopted by the present invention is:

[0008] A test device for the wettability of a resin to a carbon fiber, used for the wettability test of a carbon fiber bundle to be tested under the conditions of natural rotation tension and / or rotation external force tension, comprising:

[0009] A workbench, the top surface of which is a horizontal work surface;

[0010] A left support assembly, the left support assembly being arranged on the working surface; the left support assembly having one or two left circular pieces;

[0011] A right support assembly, the right support assembly is arranged on the working surface and is parallel to the left support assembly; the right support assembly has one or two right circular cake pieces; the right circular cake piece is used in pairs in parallel with the left circular cake piece, and the distance between the lowest point of the edge of the right circular cake piece and the working surface is greater than the distance between the highest point of the edge of the left circular cake piece and the working surface;

[0012] A driving assembly, the driving assembly is drivingly connected to the right circular cake member to drive the right circular cake member to rotate;

[0013] Wherein, when the carbon fiber bundle to be tested is in a rotating and naturally tightened state, one end of the carbon fiber bundle to be tested is connected to the right circular cake piece, and the other end is connected to the left circular cake piece;

[0014] When the carbon fiber bundle to be tested is in a rotating external force tension condition, one end of the carbon fiber bundle to be tested is connected to the right circular cake member, and the other end passes through the left circular cake member and is connected to the second counterweight block arranged in the air.

[0015] Furthermore, it is also used for the wetting test of the carbon fiber bundle to be tested under the condition of double-bundle friction; the testing device also includes:

[0016] A beam combining assembly, the beam combining assembly is arranged on the working surface and is located between the left supporting assembly and the right supporting assembly;

[0017] Wherein, when the carbon fiber bundle to be tested is in a double-bundle friction situation, two strands of carbon fiber bundle to be tested which are respectively connected to different positions of a corresponding left circular cake piece are combined into one strand that contacts each other via the bundle combining assembly.

[0018] Furthermore, the left support assembly further comprises:

[0019] A left support plate seat, the left support plate seat is vertically arranged on the working surface; a left mounting hole is opened on the left support plate seat to cooperate with the left circular piece, and the left circular piece is rotatably arranged in the left mounting hole;

[0020] Among them, a left threading groove is opened on the left circular piece along its own thickness direction; the bottom of the left threading groove is located near the center of the left circular piece; a left installation groove is opened on the side surface of the left circular piece away from the right supporting component along the diameter direction of the left circular piece; a left fixing piece is detachably arranged in the left installation groove; a left threading hole is opened on the left fixing piece at a position corresponding to the bottom of the left threading groove.

[0021] Furthermore, a left wire-passing groove is opened along the thickness direction of the left support plate seat between the highest point of the edge of the left mounting hole and the top surface of the left support plate seat; the bottom area of ​​the left wire-passing groove is connected to the internal area of ​​the left mounting hole.

[0022] Furthermore, the right support assembly also includes:

[0023] A right support plate seat, the right support plate seat is vertically arranged on the working surface and parallel to the left support plate seat; a right mounting hole matching with the right circular cake piece is opened on the right support plate seat, and the right circular cake piece is rotatably matched and arranged in the right mounting hole;

[0024] Among them, the right circular cake piece is provided with a right threading groove along its own thickness direction; the bottom of the right threading groove is located near the edge away from the center of the right circular cake piece; a right mounting groove is provided on the side surface of the right circular cake piece away from the left supporting component along the direction intersecting with the bottom of the right threading groove; a right fixing piece is detachably arranged in the right mounting groove; a right threading hole is provided on the right fixing piece at a position corresponding to the bottom of the right threading groove.

[0025] Furthermore, a right wire passing groove is opened along the thickness direction of the right support plate seat between the highest point of the edge of the right mounting hole and the top surface of the right support plate seat; the bottom area of ​​the right wire passing groove is connected to the internal area of ​​the right mounting hole.

[0026] Furthermore, the driving assembly comprises:

[0027] Driven wheels, each of which is connected to the right circular disk shaft in cooperation with the other;

[0028] A tension wheel, the tension wheel is connected with the fixed part shaft on the right support assembly;

[0029] A motor, wherein a driving wheel is provided at an output end of the motor;

[0030] A belt is sleeved on the driven wheel, the tension wheel and the driving wheel.

[0031] Furthermore, the beam combining component comprises:

[0032] A left support rod, the left support rod is located between the left support assembly and the right support assembly, adjacent to the left support assembly, and vertically arranged on the work surface; a left wire through slot is provided on the top of the left support rod; the lowest position of the bottom of the left wire through slot is higher than the highest position of the edge of the left round cake piece;

[0033] A right support rod, the right support rod is located between the left support assembly and the right support assembly, adjacent to the right support assembly, and vertically arranged on the work surface; a right wire through slot is provided on the top of the right support rod; the lowest position of the bottom of the right wire through slot is higher than the highest position of the edge of the right circular cake, and the lowest position of the bottom of the right wire through slot is lower than the lowest position of the bottom of the left wire through slot;

[0034] An inclined plate seat, the inclined plate seat is arranged on a side of the left support assembly away from the right support assembly in a manner of being inclined toward the outside of the workbench; the suspended inclined upper end of the inclined plate seat is lower than the lowest point of the edge of the left circular cake piece;

[0035] A first counterweight block is connected to one end of the carbon fiber bundle to be tested and then passes over the inclined plate seat and is suspended in the air.

[0036] Furthermore, the slot length direction of the left wire through slot forms an acute angle with the vertical connection direction between the left support component and the right support component;

[0037] The slot length direction of the right wire through slot forms an acute angle with the vertical connection direction between the left support component and the right support component;

[0038] The slot length direction of the left wire through slot is parallel to the slot length direction of the right wire through slot.

[0039] Based on the same inventive concept, the present invention also provides a method for testing the wettability of carbon fiber to resin, based on the aforementioned testing device for the wettability of carbon fiber to resin, a preset volume of resin is dripped onto a carbon fiber bundle to be tested fixed by a left circular cake piece and a right circular cake piece used in pairs, and after reaching a preset test time, the length of the wettability trace of the resin on the carbon fiber bundle to be tested is measured, and this length is used as the wettability effect of the resin on the carbon fiber under rotation and natural tension;

[0040] A preset volume of resin is dripped onto the carbon fiber bundle to be tested which is fixed by the left and right circular cake pieces used in pairs and the second counterweight. After reaching the preset test time, the length of the resin wetting mark on the carbon fiber bundle to be tested is measured, and this length is used as the wetting effect of the resin on the carbon fiber under the condition of rotational external force tension;

[0041] A preset volume of resin is dripped onto two pairs of left and right circular cake pieces, and the two strands of carbon fiber bundles to be tested are combined into one strand that is in contact with each other through a bundle combining assembly. After reaching the preset test time, the average length of the resin wetting marks on the two strands of carbon fiber bundles to be tested is measured, and this length is used as the resin wetting effect on the carbon fiber under double-beam friction conditions.

[0042] The beneficial effects of the present invention are:

[0043] The test method and test device for the wettability of carbon fiber by resin of the present invention can realize wettability testing under three dynamic conditions: rotational natural tension, rotational external force tension and double-beam friction, provide wettability test data at more angles, further enhance the reference value of the wettability test data, and make up for the limitations of data in simple static testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 It is a front view of a testing device for the wettability of carbon fiber by resin in the embodiment.

[0046] Figure 2 Schematic diagram of the three-dimensional structure of the test device for the wettability of carbon fiber by resin in the embodiment Figure 1 , wherein the first counterweight is not shown.

[0047] Figure 3 Schematic diagram of the three-dimensional structure of the test device for the wettability of carbon fiber by resin in the embodiment Figure 2 , wherein the first counterweight is not shown.

[0048] Figure 4 Schematic diagram of the three-dimensional structure of the test device for the wettability of carbon fiber by resin in the embodiment Figure 3 , wherein the first counterweight is not shown.

[0049] Figure 5 for Figure 2 A partial enlarged schematic diagram of point M in the middle.

[0050] Figure 6 for Figure 2 A partial enlarged schematic diagram of point N in the middle.

[0051] Figure 7 for Figure 4 A partial enlarged schematic diagram of point P in the middle.

[0052] Figure 8 This is an enlarged structural diagram of the top of the left support rod.

[0053] Fig. 9 This is an enlarged structural diagram of the top of the right support rod.

[0054] Fig.10Schematic diagram of the working state of the test device for the wettability of carbon fiber by resin in the embodiment.

[0055] Fig.11 It is a schematic diagram of the three-dimensional structure of another form of a testing device for the wettability of carbon fiber by resin in an embodiment.

[0056] The accompanying drawings are marked as follows:

[0057] 100-working table, 110-working surface;

[0058] 200-left support assembly, 210-left support plate seat, 211-left mounting hole, 212-left wire-passing slot, 220-left round cake piece, 221-left threading slot, 222-left mounting slot, 230-left fixing piece, 231-left threading hole;

[0059] 300-right support assembly, 310-right support plate seat, 311-right mounting hole, 312-right wire through slot, 320-right round cake piece, 321-right wire through slot, 322-right mounting slot, 330-right fixing piece, 331-right wire through hole;

[0060] 400-beam combining assembly, 410-left supporting rod, 411-left wire through slot, 420-right supporting rod, 421-right wire through slot, 430-inclined plate seat, 440-first counterweight block;

[0061] 500-driving assembly, 510-driven wheel, 520-tensioning wheel, 530-motor, 531-driving wheel, 540-belt;

[0062] 600 - Second counterweight. DETAILED DESCRIPTION

[0063] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0064] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention.

[0065] The embodiments of the invention are described in detail below with reference to the accompanying drawings.

[0066] Figure 1 It is a front view of a testing device for the wettability of carbon fiber by resin in the embodiment. Figure 2 Schematic diagram of the three-dimensional structure of the test device for the wettability of carbon fiber by resin in the embodiment Figure 1 . Figure 3 Schematic diagram of the three-dimensional structure of the test device for the wettability of carbon fiber by resin in the embodiment Figure 2 . Figure 4 Schematic diagram of the three-dimensional structure of the test device for the wettability of carbon fiber by resin in the embodiment Figure 3 .like Figure 1~Figure 4 As shown in the figure, the test device for the wettability of the resin to the carbon fiber includes a workbench 100 which is roughly in the shape of a rectangular parallelepiped. The top surface of the workbench 100 is its work surface 110, and the work surface 110 is roughly in a horizontal state to serve as a reference plane for subsequent tests. A left support plate seat 210 and a right support plate seat 310 which are roughly rectangular are respectively arranged on both sides of the length direction of the work surface 110. The left support plate seat 210 and the right support plate seat 310 are arranged roughly along the width direction of the work surface 110, and the two are parallel to each other and perpendicular to the work surface 110; at the same time, the height of the left support plate seat 210 is less than the height of the right support plate seat 310. The carbon fiber bundle to be tested is arranged between the left support plate seat 210 and the right support plate seat 310.

[0067] like Figure 1~Figure 4 As shown in , four left mounting holes 211 with the same diameter are evenly opened near the top of the left support plate seat 210 along its own length direction; the distance between the center of each left mounting hole 211 and the working surface 110 is the same. A left wire-passing slot 212 is opened along the thickness direction of the left support plate seat 210 from the highest point of the edge of the left mounting hole 211 to the top surface of the left support plate seat 210; the cross section of the left wire-passing slot 212 along the slot width direction is roughly similar to an isosceles trapezoid, the length of the upper base is greater than the length of the lower base, and the length of the lower base is less than the diameter of the left mounting hole 211; the bottom area of ​​the left wire-passing slot 212 is connected to the inner area of ​​the left mounting hole 211. Figure 5 for Figure 2 The local enlarged schematic diagram of M in the figure. Figure 5As shown in the figure, each left mounting hole 211 has a left circular piece 220. The diameter of the left circular piece 220 is the same as the diameter of the left mounting hole 211, and the left circular piece 220 can rotate after being arranged in the left mounting hole 211. Other auxiliary structures for preventing the left circular piece 220 from rotating in the left mounting hole 211 and not escaping from the left mounting hole 211 can be arranged according to conventional technical means in the field, and no creative labor is required, so no detailed description is made in this embodiment. A left threading groove 221 is provided on the left circular piece 220 along its own thickness direction; the bottom of the left threading groove 221 is located near the center of the left circular piece 220. A left mounting groove 222 is provided on the side surface of the left circular piece 220 away from the right support plate seat 310 along the diameter direction of the left circular piece 220; a left fixing piece 230 is detachably arranged in the left mounting groove 222. A left threading hole 231 is provided on the left fixing member 230 at a position corresponding to the bottom of the left threading slot 221. In this embodiment, through the structure described above, one end of the carbon fiber bundle to be tested can be quickly inserted into the vicinity of the bottom of the left threading slot 221 when the left threading slot 212 and the left threading slot 221 are connected, and after passing through the left threading hole 231, the position of one end of the carbon fiber bundle to be tested is roughly limited to the center of the left circular member 220, and the one end of the carbon fiber bundle to be tested is quickly fixed.

[0068] In this embodiment, the left support plate seat 210, the left disk member 220 and the left fixing member 230 together constitute the left support assembly 200; the left support assembly 200 is used for quickly fixing one end of the carbon fiber bundle to be tested.

[0069] like Figure 1~Figure 4 As shown in , near the top of the right support plate seat 310, four right mounting holes 311 of the same diameter are uniformly opened along its own length direction; the distance between each right mounting hole 311 and the working surface 110 is the same. In addition, the distance between the lowest position of the edge of the right mounting hole 311 and the working surface 110 is greater than the distance between the highest position of the edge of the left mounting hole 211 and the working surface 110. A right wire-passing slot 312 is opened along the thickness direction of the right support plate seat 310 from the highest point of the edge of the right mounting hole 311 to the top surface of the right support plate seat 310; the cross section of the right wire-passing slot 312 along the slot width direction is roughly an isosceles trapezoid, the length of the upper base is greater than the length of the lower base, and the length of the lower base is less than the diameter of the right mounting hole 311; the slot bottom area of ​​the right wire-passing slot 312 is connected to the internal area of ​​the right mounting hole 311. Figure 6 for Figure 2 A partial enlarged schematic diagram of point N in the middle. Figure 7 for Figure 4 The enlarged schematic diagram of the part P in the figure. Figure 6 and Figure 7As shown in , each right mounting hole 311 has a right circular cake member 320. The diameter of the right circular cake member 320 is the same as the diameter of the right mounting hole 311, and the right circular cake member 320 can rotate after being arranged in the right mounting hole 311. Other auxiliary structures for preventing the right circular cake member 320 from rotating in the right mounting hole 311 and not escaping from the right mounting hole 311 can be arranged according to conventional technical means in the field, and no creative labor is required, so no detailed description is made in this embodiment. A right threading groove 321 is provided on the right circular cake member 320 along its own thickness direction; the bottom of the right threading groove 321 is located near the edge away from the center of the right circular cake member 320, that is, the bottom of the right threading groove 321 does not coincide with the center of the right circular cake member 320, and has a certain eccentricity. A right mounting groove 322 is provided on the surface of one side of the right circular cake member 320 away from the left support plate seat 210 in a direction intersecting with the bottom of the right threading groove 321; a right fixing member 330 is detachably provided in the right mounting groove 322. A right threading hole 331 is provided on the right fixing member 330 at a position corresponding to the bottom of the right threading groove 321. In this embodiment, through the structure described above, the other end of the carbon fiber bundle to be tested can be quickly inserted into the vicinity of the bottom of the right threading groove 321 when the right threading groove 312 and the right threading groove 321 are connected, and after passing through the right threading hole 331, the position of the other end of the carbon fiber bundle to be tested is roughly restricted to the edge position of the right circular cake member 320, and the other end of the carbon fiber bundle to be tested is quickly fixed.

[0070] In this embodiment, the right support plate seat 310, the right round cake member 320 and the right fixing member 330 together constitute the right support assembly 300; the right support assembly 300 is used to quickly fix the other end of the carbon fiber bundle to be tested. The left round cake member 220 and the right round cake member 320 are used in pairs, respectively, for positioning the two ends of the same carbon fiber bundle to be tested. At the same time, due to the different height positions of the two ends of the carbon fiber bundle to be tested restricted by the left support assembly 200 and the right support assembly 300, the carbon fiber bundle to be tested fixed between the left support assembly 200 and the right support assembly 300 presents a certain tilt angle (for example, 30°) with the working surface 110. A preset volume of resin is dripped onto the tilted carbon fiber bundle to be tested. After reaching the preset test time, the length of the resin wetting trace on the carbon fiber bundle to be tested is measured, and this length is used as a specific presentation of the resin's wetting effect on the carbon fiber.

[0071] like Figure 1~Figure 4As shown in the figure, a left support rod 410 and a right support rod 420 are arranged between the left support plate seat 210 and the right support plate seat 310, and the left support rod 410 and the right support rod 420 are perpendicular to the working surface 110. An inclined plate seat 430 is arranged near the wide edge of the workbench 100 adjacent to the left support plate seat 210 at an obtuse angle to the working surface 110. The suspended inclined upper end of the inclined plate seat 430 is located outside the working surface 110 and below the lowest point of the edge of the left mounting hole 211, and its edges and corners are processed with arc transition. The inclined plate seat 430 is mainly used to support the first counterweight block 440 connected to the carbon fiber bundle to be tested and to suspend it in the air; the first counterweight block 440 is used to tighten the carbon fiber bundle to be tested.

[0072] The left support rod 410 is adjacent to the left support plate seat 210 and is located at a middle position between two adjacent left mounting holes 211 adjacent to the edge of the workbench 100 . Figure 8 The diagram is an enlarged structural diagram of the top of the left support rod. Figure 8 As shown in , a left wire slot 411 is provided at the top of the left support rod 410 for the carbon fiber bundle to be tested to pass through. The slot width of the left wire slot 411 is less than or equal to the equivalent diameter of the carbon fiber bundle to be tested in a natural state (under no force), and the slot depth is greater than twice the equivalent diameter of the carbon fiber bundle to be tested in a natural state (under no force); the lowest position of the bottom of the left wire slot 411 is higher than the highest position of the edge of the left mounting hole 211. At the same time, the slot length direction of the left wire slot 411 forms an acute angle (for example, 5°) with the vertical connection direction between the left support plate seat 210 and the right support plate seat 310. In order to prevent the edge corners of the left wire slot 411 from scratching the carbon fiber bundle to be tested, the edge corners of the left wire slot 411 are all processed with arc angles for smooth transition.

[0073] The right support rod 420 is adjacent to the right support plate seat 310 and is located at a middle position between two adjacent right mounting holes 311 adjacent to the edge of the workbench 100 . Fig. 9 The diagram is an enlarged schematic diagram of the top structure of the right support rod. Fig. 9As shown in FIG. 4 , a right wire through slot 421 is provided on the top of the right support rod 420 for the carbon fiber bundle to be tested to pass through. The slot width of the right wire through slot 421 is less than or equal to the equivalent diameter of the carbon fiber bundle to be tested in a natural state (under no force), and its slot depth is greater than twice the equivalent diameter of the carbon fiber bundle to be tested in a natural state (under no force); the lowest position of the slot bottom of the right wire through slot 421 is higher than the highest position of the edge of the right mounting hole 311, and the lowest position of the slot bottom of the right wire through slot 421 is lower than the lowest position of the slot bottom of the left wire through slot 411; at the same time, the slot length direction of the right wire through slot 421 is at an acute angle (for example, 5°) to the vertical connection direction between the left support plate seat 210 and the right support plate seat 310, and the slot length direction of the left wire through slot 411 is parallel to the slot length direction of the right wire through slot 421, so that the carbon fiber bundle to be tested is in the shape of multiple bending lines when passing between the left circular cake member 220, the left wire through slot 411, the right wire through slot 421 and the right circular cake member 320, which is conducive to the carbon fiber bundle to be tested being gathered into a strand that contacts each other. In order to prevent the edge corners of the right wire through slot 421 from scratching the carbon fiber bundle to be tested, the edge corners of the right wire through slot 421 are all processed with arc angles for smooth transition.

[0074] In this embodiment, the left support rod 410, the right support rod 420, the inclined plate seat 430 and the first counterweight block 440 together constitute a beam combining assembly 400; the beam combining assembly 400 is used to combine two strands of carbon fiber bundles to be tested into one strand that contacts each other.

[0075] like Figure 1~Figure 4 As shown in the figure, a transmission shaft is provided at the center position of the side of the right circular cake member 320 away from the left support plate seat 210, and a driven wheel 510 is provided at the other end of the transmission shaft; each of the four right circular cake members 320 corresponds to a driven wheel 510. A tensioning wheel 520 is also provided on the side of the right support plate seat 310 away from the left support plate seat 210. A motor 530 is also provided on the workbench 100; a driving wheel 531 is provided at the output end of the motor 530. The four driven wheels 510, the tensioning wheel 520 and the driving wheel 531 are coplanar, and are matched with a belt 540. When the motor 530 is working, the belt 540 can drive the driven wheel 510 to rotate, thereby driving the right circular cake member 320.

[0076] In this embodiment, the driven wheel 510, the tensioning wheel 520, the motor 530, the driving wheel 531 and the belt 540 together constitute a driving assembly 500; the driving assembly 500 is used to drive the carbon fiber bundle to be tested to rotate and move linearly.

[0077] Fig.10 Schematic diagram of the working state of the test device for the wettability of the resin to the carbon fiber in the embodiment. Fig.10 As shown in , the wettability tests of the carbon fiber bundle to be tested are carried out simultaneously under three conditions: rotational natural tension, rotational external force tension, and double-bundle friction.

[0078] Among them, one end of the carbon fiber bundle A to be tested is quickly inserted into the bottom of the right threading slot 321 when the right threading slot 312 is connected to the right threading slot 321, and is connected to the right circular cake member 320 by tying a knot, a chuck, etc. after passing through the right threading hole 331 on the right fixing member 330. The other end of the carbon fiber bundle A to be tested is quickly inserted into the bottom of the left threading slot 221 when the left threading slot 212 is connected to the left threading slot 221, and is connected to the left circular cake member 220 by tying a knot, a chuck, etc. after passing through the left threading hole 231 on the left fixing member 230. At this time, the carbon fiber bundle A to be tested between the right circular cake member 320 and the left circular cake member 220 is in a naturally tightened state. The motor 530 drives the right circular cake member 320 to rotate via a belt, and the carbon fiber bundle A to be tested moves in a cone shape as a whole and twists spontaneously at the same time. A preset volume of resin is dropped onto a higher point on the tilted carbon fiber bundle A to be tested. After the preset test time (e.g. 5 minutes) is reached, the length of the resin wetting mark on the carbon fiber bundle A to be tested is measured, and this length is used as a specific presentation of the resin wetting effect on the carbon fiber under the condition of rotation and natural tension.

[0079] One end of the carbon fiber bundle B to be tested is quickly inserted into the bottom of the right threading slot 321 when the right threading slot 312 is connected to the right threading slot 321, and is connected to the right circular cake member 320 by tying a knot, chuck, etc. after passing through the right threading hole 331 on the right fixing member 330. The other end of the carbon fiber bundle B to be tested is quickly inserted into the bottom of the left threading slot 221 when the left threading slot 212 is connected to the left threading slot 221, and is connected to the second counterweight 600 after passing through the left threading hole 231 on the left fixing member 230; the second counterweight 600 is suspended after passing over the inclined plate seat 430. At this time, the carbon fiber bundle B to be tested between the right circular cake member 320 and the left circular cake member 220 is in a tensioned state by the second counterweight 600. The motor 530 drives the right circular cake member 320 to rotate via the belt, and the entire carbon fiber bundle B to be tested moves in a conical shape while twisting spontaneously, and is continuously stretched by the second counterweight 600. A preset volume of resin is dripped onto a higher point on the inclined carbon fiber bundle B to be tested, and after reaching a preset test time (e.g., 5 minutes), the length of the resin wetting trace on the carbon fiber bundle B to be tested is measured, and this length is used as a specific presentation of the resin wetting effect on the carbon fiber under the condition of rotational external force tension.

[0080] One end of the carbon fiber bundle C to be tested is quickly inserted into the bottom of the right threading slot 321 when the right threading slot 312 is connected to the right threading slot 321, and is connected to the right circular cake member 320 by tying a knot, clamping, etc. after passing through the right threading hole 331 on the right fixing member 330. The other end of the carbon fiber bundle C to be tested is quickly inserted into the bottom of the left threading slot 221 when the left threading slot 212 is connected to the left threading slot 221, and is connected to the first counterweight 440 after passing through the left threading hole 231 on the left fixing member 230; the first counterweight 440 is suspended after passing over the inclined plate seat 430. At this time, the carbon fiber bundle C to be tested between the right circular cake member 320 and the left circular cake member 220 is in a tensioned state by the first counterweight 440. At the same time, one end of the carbon fiber bundle D to be tested is quickly inserted into the bottom of the right threading slot 321 when the right threading slot 312 is connected to the right threading slot 321, and is connected to the right circular cake member 320 by tying a knot, chuck, etc. after passing through the right threading hole 331 on the right fixing member 330. The other end of the carbon fiber bundle D to be tested can be quickly inserted into the bottom of the left threading slot 221 when the left threading slot 212 is connected to the left threading slot 221, and is connected to the first counterweight 440 after passing through the left threading hole 231 on the left fixing member 230; the first counterweight 440 is suspended after passing over the inclined plate seat 430. At this time, the carbon fiber bundle D to be tested between the right circular cake member 320 and the left circular cake member 220 is in a tensioned state by the first counterweight 440. In addition, the middle parts of the carbon fiber bundle C to be tested and the carbon fiber bundle D to be tested are assembled into one strand in the left wire through slot 411 and the right wire through slot 421. The fixed positions of the carbon fiber bundle C to be tested and the carbon fiber bundle D to be tested and the corresponding right circular cake member 320 are different, so the distances between the fixed positions of the carbon fiber bundle C to be tested and the carbon fiber bundle D to be tested and the corresponding right circular cake member 320 and the right wire through slot 421 are different. With the rotation of the corresponding right circular cake member 320, the concentrated areas of the carbon fiber bundle C to be tested and the carbon fiber bundle D to be tested in the left wire through slot 411 and the right wire through slot 421 undergo relative linear motion, generating friction. A preset volume of resin is dripped onto a higher point on the strand where the inclined carbon fiber bundle C to be tested and the carbon fiber bundle D to be tested are assembled into one strand in contact with each other. After reaching a preset test time (such as 5 minutes), the average length of the resin wetting traces on the carbon fiber bundle C to be tested and the carbon fiber bundle D to be tested is measured, and this length is used as a specific presentation of the resin wetting effect on the carbon fiber under the double-beam friction condition.

[0081] The test device for the wettability of carbon fiber by resin in this embodiment can realize wettability tests under three dynamic conditions: rotational natural tension, rotational external force tension, and double-beam friction, providing wettability test data from more angles, further improving the reference value of the wettability test data, and making up for the limitations of data in simple static testing.

[0082] In this embodiment Fig.10The test device for the wettability of carbon fiber by resin shown can realize wettability tests under three dynamic conditions: rotational natural tension, rotational external force tension and double-beam friction. According to needs, only rotational natural tension, rotational external force tension or double-beam friction conditions can be realized each time.

[0083] Fig.11 FIG. 2 is a schematic diagram of a three-dimensional structure of another type of test device for the wettability of carbon fiber by resin in an embodiment. Fig.11 As shown in the figure, the left mounting hole 211 and the right mounting hole 311 are respectively provided with two in the test device for the wettability of the resin to the carbon fiber, and the rest of the structure is the same as the above structure. Fig.11 The test device for the wettability of carbon fiber by resin shown in can perform wettability tests under rotational natural tension, rotational external force tension or double-beam friction at a single time, or perform wettability tests under rotational natural tension and rotational external force tension at the same time.

Claims

1. A test device for the wettability of carbon fiber by resin, used for the wettability test of the carbon fiber bundle to be tested under the condition of natural rotation tension or rotation external force tension, characterized in that: include: A workbench, the top surface of which is a horizontal work surface; A left support assembly, the left support assembly being arranged on the working surface; the left support assembly having one or two left circular pieces; A right support assembly, the right support assembly is arranged on the working surface and is parallel to the left support assembly; the right support assembly has one or two right circular cake pieces; the right circular cake piece is used in pairs in parallel with the left circular cake piece, and the distance between the lowest point of the edge of the right circular cake piece and the working surface is greater than the distance between the highest point of the edge of the left circular cake piece and the working surface; A driving assembly, the driving assembly is drivingly connected to the right circular cake member to drive the right circular cake member to rotate; Wherein, when the carbon fiber bundle to be tested is in a rotating and naturally tightened state, one end of the carbon fiber bundle to be tested is connected to the right circular cake piece, and the other end is connected to the left circular cake piece; When the carbon fiber bundle to be tested is in a rotating external force tension condition, one end of the carbon fiber bundle to be tested is connected to the right circular cake piece, and the other end passes through the left circular cake piece and is connected to the second counterweight block arranged in the air; The left support assembly also includes: A left support plate seat, the left support plate seat is vertically arranged on the working surface; a left mounting hole is opened on the left support plate seat to cooperate with the left circular piece, and the left circular piece is rotatably arranged in the left mounting hole; Wherein, a left threading groove is provided on the left circular cake member along its thickness direction; the bottom of the left threading groove is located near the center of the left circular cake member; a left mounting groove is provided on the surface of the left circular cake member on one side away from the right supporting assembly along the diameter direction of the left circular cake member; a left fixing member is detachably provided in the left mounting groove; a left threading hole is provided on the left fixing member at a position corresponding to the bottom of the left threading groove; The right support assembly also includes: A right support plate seat, the right support plate seat is vertically arranged on the working surface and parallel to the left support plate seat; a right mounting hole matching with the right circular cake piece is opened on the right support plate seat, and the right circular cake piece is rotatably matched and arranged in the right mounting hole; Among them, the right circular cake piece is provided with a right threading groove along its own thickness direction; the bottom of the right threading groove is located near the edge away from the center of the right circular cake piece; a right mounting groove is provided on the side surface of the right circular cake piece away from the left supporting component along the direction intersecting with the bottom of the right threading groove; a right fixing piece is detachably arranged in the right mounting groove; a right threading hole is provided on the right fixing piece at a position corresponding to the bottom of the right threading groove.

2. The device for testing the wettability of carbon fiber by resin according to claim 1, characterized in that: It is also used for the wetting test of the carbon fiber bundle to be tested under the condition of double-bundle friction; the testing device also includes: A beam combining assembly, the beam combining assembly is arranged on the working surface and is located between the left supporting assembly and the right supporting assembly; Wherein, when the carbon fiber bundle to be tested is in a double-bundle friction situation, two strands of carbon fiber bundle to be tested which are respectively connected to different positions of a corresponding left circular cake piece are combined into one strand that contacts each other via the bundle combining assembly.

3. The testing device for the wettability of carbon fiber by resin according to claim 1, characterized in that: A left wire-passing slot is provided between the highest point of the edge of the left mounting hole and the top surface of the left support plate seat along the thickness direction of the left support plate seat; the bottom area of ​​the left wire-passing slot is connected to the internal area of ​​the left mounting hole.

4. The testing device for the wettability of carbon fiber by resin according to claim 1, characterized in that: A right wire-passing groove is provided between the highest point of the edge of the right mounting hole and the top surface of the right support plate seat along the thickness direction of the right support plate seat; the bottom area of ​​the right wire-passing groove is connected to the internal area of ​​the right mounting hole.

5. The device for testing the wettability of carbon fiber by resin according to any one of claims 1 to 4, characterized in that: The drive assembly comprises: Driven wheels, each of which is connected to the right circular disk shaft in cooperation with the other; A tension wheel, the tension wheel is connected with the fixed part shaft on the right support assembly; A motor, wherein a driving wheel is provided at an output end of the motor; A belt is sleeved on the driven wheel, the tension wheel and the driving wheel.

6. The device for testing the wettability of carbon fiber by resin according to any one of claims 2 to 4, characterized in that: The beam combining component comprises: A left support rod, the left support rod is located between the left support assembly and the right support assembly, adjacent to the left support assembly, and vertically arranged on the work surface; a left wire through slot is provided on the top of the left support rod; the lowest position of the bottom of the left wire through slot is higher than the highest position of the edge of the left round cake piece; A right support rod, the right support rod is located between the left support assembly and the right support assembly, adjacent to the right support assembly, and vertically arranged on the work surface; a right wire through slot is provided on the top of the right support rod; the lowest position of the bottom of the right wire through slot is higher than the highest position of the edge of the right circular cake piece, and the lowest position of the bottom of the right wire through slot is lower than the lowest position of the bottom of the left wire through slot; An inclined plate seat, the inclined plate seat is arranged on a side of the left support assembly away from the right support assembly in a manner of being inclined toward the outside of the workbench; the suspended inclined upper end of the inclined plate seat is lower than the lowest point of the edge of the left circular cake piece; A first counterweight block is connected to one end of the carbon fiber bundle to be tested and then passes over the inclined plate seat and is suspended in the air.

7. The device for testing the wettability of carbon fiber by resin according to claim 6, characterized in that: The slot length direction of the left wire through slot forms an acute angle with the vertical connection direction between the left support component and the right support component; The slot length direction of the right wire through slot forms an acute angle with the vertical connection direction between the left support component and the right support component; The slot length direction of the left wire through slot is parallel to the slot length direction of the right wire through slot.

8. A method for testing the wettability of a resin to a carbon fiber, which is implemented based on the testing device for the wettability of a resin to a carbon fiber as claimed in any one of claims 2 to 7, characterized in that: A preset volume of resin is dripped onto the carbon fiber bundle to be tested, which is fixed by the left and right circular pieces used in pairs. After the preset test time is reached, the length of the resin wetting mark on the carbon fiber bundle to be tested is measured, and this length is used as the resin wetting effect on the carbon fiber under the condition of rotation and natural tension; A preset volume of resin is dripped onto the carbon fiber bundle to be tested which is fixed by the left and right circular cake pieces used in pairs and the second counterweight. After reaching the preset test time, the length of the resin wetting mark on the carbon fiber bundle to be tested is measured, and this length is used as the wetting effect of the resin on the carbon fiber under the condition of rotational external force tension; A preset volume of resin is dripped onto two pairs of left and right circular cake pieces, and the two strands of carbon fiber bundles to be tested are combined into one strand that is in contact with each other through a bundle combining assembly. After reaching the preset test time, the average length of the resin wetting marks on the two strands of carbon fiber bundles to be tested is measured, and this length is used as the resin wetting effect on the carbon fiber under double-beam friction conditions.

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