CN220207227U - Device for preparing large-tow carbon fiber multifilament stretching spline through one-step molding - Google Patents
Device for preparing large-tow carbon fiber multifilament stretching spline through one-step molding Download PDFInfo
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- CN220207227U CN220207227U CN202321943611.0U CN202321943611U CN220207227U CN 220207227 U CN220207227 U CN 220207227U CN 202321943611 U CN202321943611 U CN 202321943611U CN 220207227 U CN220207227 U CN 220207227U
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 69
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 69
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 238000000465 moulding Methods 0.000 title claims abstract description 26
- 238000004804 winding Methods 0.000 claims abstract description 82
- 239000003292 glue Substances 0.000 claims abstract description 59
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- 239000000835 fiber Substances 0.000 claims abstract description 44
- 238000009730 filament winding Methods 0.000 claims abstract description 26
- 238000003825 pressing Methods 0.000 claims description 38
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- 238000001816 cooling Methods 0.000 description 5
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerol Natural products OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
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- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
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- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a device for preparing a large-tow carbon fiber multifilament stretching spline by one-step molding, which relates to the technical field of material performance testing and comprises a filament winding assembly, a glue groove, a supporting assembly, a tensioning structure and a compacting structure, wherein the filament winding assembly comprises a first filament winding rod and a second filament winding rod, and the first filament winding rod and the second filament winding rod are used for winding fiber tows; glue solution is contained in the glue tank; the support assembly includes a first lower support plate and a second lower support plate. According to the utility model, the large-tow carbon fiber multifilament tensile property spline is prepared by adopting a one-step method, the spline and the reinforcing plate are simultaneously cured, the damage to the spline caused by the reinforcing process of the reinforcing plate is reduced, the problem of debonding and sliding of the prepared sample in the reinforcing process is avoided, in addition, the fiber bundle dipping curing and the reinforcing plate reinforcing curing are simultaneously carried out, the sample preparation time is shortened, the sample preparation efficiency is improved, the appearance of the sample is smooth, and the test result is stable.
Description
Technical Field
The utility model relates to the technical field of material performance test, in particular to a device for preparing a large-tow carbon fiber multifilament tensile spline by one-step molding.
Background
The carbon fiber is a high-performance fiber material with carbon content of more than 90%, has a series of excellent performances such as high specific strength, high specific modulus, high temperature resistance, corrosion resistance, fatigue resistance, radiation resistance, electric conduction, heat conduction, small relative density and the like, and is widely applied to the fields of aviation, aerospace, automobiles, electronics, machinery, chemical industry, light spinning and the like, and has wide development prospect.
Carbon fibers can be divided into large and small tows according to the number of filaments in a bundle of fibers. Carbon fibers of 24K and above are generally referred to as small tow carbon fibers of 24K and below. Compared with the small-tow carbon fiber, the large-tow carbon fiber has the advantages of low cost, easy source, high preparation efficiency and the like.
Compared with the carbon fiber with small tows, the carbon fiber with large tows has the difficulty of resin infiltration. The quality of spline preparation directly influences the mechanical properties of fibers, and the resin infiltration and curing process is the key of spline preparation. At present, GB/T3362-2017 carbon fiber multifilament tensile property test method is only suitable for testing mechanical properties of small-tow carbon fibers, no effective method for evaluating tensile properties of large-tow carbon fiber multifilament exists in China, and two-step manual sample preparation methods are adopted in GB/T3362-2017 carbon fiber multifilament tensile property test method, american Standard ASTMD4018 carbon fiber filament and graphite fiber tow performance standard test method, japanese Standard JISK7073-1988 and the like, namely fibers with certain length are taken, are wound, impregnated, heated and solidified, solidified sample strips are cut into multifilament segments after cooling, and reinforcing sheets are adhered to two ends of the multifilament segment sample strips. The two-step forming method is complex in operation, and the cured spline is easily damaged in the operation process, so that defects are increased, and the mechanical properties of the fiber cannot be accurately represented. And the dipping and winding processes have more factors influencing the preparation consistency of the sample, the difference and uncertainty of the dipping time, the tension and the like, and the number of monofilaments of the multifilament is more, so that the fracture is split or larger pores exist in the spline.
In order to meet the requirements of development and production evaluation of large-tow carbon fibers in the future, a preparation method of large-tow carbon fiber tensile bars, which is simple to operate and has less damage to carbon fiber bars in the test process, is needed.
Accordingly, in view of the above-mentioned problems, it is necessary to provide an apparatus for preparing a large-tow carbon fiber multifilament drawn spline by one-step molding.
Disclosure of Invention
The utility model aims to provide a device for preparing a large-tow carbon fiber multifilament stretching spline by one-step molding, which is suitable for preparing the large-tow carbon fiber stretching spline, is beneficial to solving the problem of difficult dipping of the large tow, and is beneficial to reducing secondary damage to the spline in the reinforcing process by adopting a one-step molding method.
To achieve the above object, an embodiment of the present utility model provides an apparatus for preparing a large-tow carbon fiber multifilament tensile spline by one-step molding, including a filament winding assembly, a glue groove, a supporting assembly, a tensioning structure, and a compacting structure;
the filament winding assembly comprises a first filament winding rod and a second filament winding rod, and the first filament winding rod and the second filament winding rod are used for winding fiber filament bundles;
glue solution is contained in the glue tank;
the support assembly comprises a first lower support plate and a second lower support plate, and the first lower support plate and the second lower support plate are symmetrically arranged above the glue groove and are used for assisting in dipping the carbon fiber multifilament and pasting the reinforcing sheet;
a tensioning structure is disposed between the filament winding assembly and the support assembly, the tensioning structure being capable of pulling the filament winding assembly to apply tension to the carbon fiber multifilament yarn;
the compaction structure is arranged on the supporting component and used for compacting and pasting the reinforcing sheet on the end parts of the carbon fiber multifilament.
In one or more embodiments of the present utility model, the tensioning structure includes a winding screw fixing block and a sliding assembly, the winding screw fixing block is movably connected to a group on the first winding screw and the second winding screw, and the winding screw fixing blocks on the first winding screw and the second winding screw are slidably mounted at bottom ends of the first lower support plate and the second lower support plate through the sliding assembly, respectively.
In one or more embodiments of the present utility model, the sliding assembly includes a tensioning slider, a tensioning bolt and a chute, wherein a group of the chutes are fixedly installed below the first lower support plate and the second lower support plate respectively, the tensioning slider is slidably connected inside the chute, the tensioning slider is fixedly connected with the wire winding rod fixing block, a screw hole is formed in the tensioning slider, and one side of the tensioning bolt penetrates through the screw hole in the tensioning slider and is in rotational connection with the chute.
In one or more embodiments of the present utility model, the tensioning structure includes a winding rod fixing block and a sliding structure, the winding rod fixing block is fixedly installed at the bottom ends of the first lower support plate and the second lower support plate, respectively, and the first winding rod and the second winding rod are slidably installed on the winding rod fixing block at the bottom ends of the first lower support plate and the second lower support plate, respectively, through the sliding structure.
In one or more embodiments of the present utility model, the sliding structure includes a square groove, a fastening nut, a threaded pull rod and a square block, the square groove is formed on one side of the wire winding rod fixing block, the square block is slidably connected inside the square groove, the threaded pull rod is fixedly connected on one side of the square block, the fastening nut is movably mounted on one side of the wire winding rod fixing block, and the fastening nut is matched with the threaded pull rod.
In one or more embodiments of the present utility model, the pressing structure includes a lifting assembly and an upper pressing plate, the lifting assembly is respectively installed on the first lower support plate and the second lower support plate in a group, the upper pressing plate is fixedly installed on the lifting assembly, and the upper pressing plate includes a first upper pressing plate and a second upper pressing plate.
In one or more embodiments of the present utility model, the lifting assembly includes a first moving ball, a second moving ball, a first moving screw, a second moving screw, a first rotating handle and a second rotating handle, where threaded holes are respectively formed on the first lower support plate and the second lower support plate, the bottom end of the first moving screw penetrates through the threaded hole in the first lower support plate and is fixedly connected with the first moving ball, the first moving ball is fixedly connected with the first upper pressure plate, the first rotating handle is fixedly connected with the top end of the first moving screw, the bottom end of the second moving screw penetrates through the threaded hole in the second lower support plate and is fixedly connected with the second moving ball, the second moving ball is fixedly connected with the second upper pressure plate, and the second rotating handle is fixedly connected with the top end of the second moving screw.
In one or more embodiments of the present utility model, the lifting assembly includes a first spring, a second spring, a first movable slide bar, a second movable slide bar, a first pull block and a second pull block, where the first lower support plate and the second lower support plate are respectively provided with a telescopic hole, the bottom end of the first movable slide bar penetrates through the telescopic hole in the first lower support plate and is fixedly connected with the first upper pressure plate, the first pull block is fixedly connected with the top end of the first movable slide bar, the first spring is sleeved outside the first movable slide bar, the bottom end of the second movable slide bar penetrates through the telescopic hole in the second lower support plate and is fixedly connected with the second upper pressure plate, the second pull block is fixedly connected with the top end of the second movable slide bar, and the second spring is sleeved outside the second movable slide bar.
In one or more embodiments of the present utility model, through holes are respectively formed on the first moving slide bar and the second moving slide bar, and a limiting pin is inserted into the through holes.
Compared with the prior art, the embodiment of the utility model has the following technical effects:
according to the utility model, the large-tow carbon fiber multifilament tensile property spline is prepared by adopting a one-step method, the spline and the reinforcing plate are simultaneously cured, the damage to the spline caused by the reinforcing process of the reinforcing plate is reduced, the problem of debonding and sliding of the prepared sample in the reinforcing process is avoided, in addition, the fiber bundle dipping curing and the reinforcing plate reinforcing curing are simultaneously carried out, the sample preparation time is shortened, the sample preparation efficiency is improved, the appearance of the sample is smooth, and the test result is stable.
Drawings
FIG. 1 is a schematic illustration of a dipping state structure of an apparatus for preparing a large-tow carbon fiber multifilament drawn spline by one-step molding according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram showing the structure of a device for preparing a large-tow carbon fiber multifilament drawn spline by one-step molding according to an embodiment of the present utility model in a turned state;
FIG. 3 is a schematic view showing a structure of a device for preparing a large-tow carbon fiber multifilament tensile spline by one-step molding according to an embodiment of the present utility model in a compression reinforced state;
FIG. 4 is a side view of an apparatus reinforcing structure for preparing a large tow carbon fiber multifilament tensile spline by one-step molding according to one embodiment of the present utility model;
FIG. 5 is a schematic view of the structure of an apparatus reinforcing sheet for preparing a large-tow carbon fiber multifilament tensile spline by one-step molding according to an embodiment of the present utility model;
FIG. 6 is a schematic view of the structure of a tensioning slide of an apparatus for preparing a large tow carbon fiber multifilament tensile spline by one-step molding according to an embodiment of the present utility model;
FIG. 7 is a schematic illustration of a dipping state structure of an apparatus for preparing a large tow carbon fiber multifilament drawn spline by one-step molding according to an embodiment of the present utility model;
fig. 8 is an enlarged view of fig. 7 a of an apparatus for preparing a large-tow carbon fiber multifilament drawn spline by one-step molding according to an embodiment of the present utility model.
The main reference numerals illustrate:
1. a first winding screw rod; 2. a second winding screw rod; 3. a fiber tow; 4. a screw winding rod fixing block; 5. tensioning the sliding block; 6. tensioning a bolt; 7. a chute; 8. a first lower support plate; 9. a second lower support plate; 10. a first movable ball head; 11. a second movable ball head; 12. a first upper platen; 13. a second upper platen; 14. a first moving screw; 15. a second moving screw; 16. a first rotary handle; 17. a second rotary handle; 18. a limit groove; 19. a reinforcing sheet positioning groove; 20. an upper reinforcing sheet; 21. a lower reinforcing sheet; 22. a flip handle; 23. a glue groove; 24. a first spring; 25. a second spring; 26. a first movable slide bar; 27. a second movable slide bar; 28. a first pull block; 29. a second pull block; 30. a limiting pin; 31. a square groove; 32. a fastening nut; 33. a threaded pull rod; 34. four squares.
Detailed Description
The following detailed description of embodiments of the utility model is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the utility model is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
As shown in fig. 1 to 8, the apparatus for preparing a large-tow carbon fiber multifilament drawn spline by one-step molding according to the preferred embodiment of the present utility model includes a filament winding assembly including a first filament winding rod 1 and a second filament winding rod 2, the first filament winding rod 1 and the second filament winding rod 2 being used to wind a fiber tow 3.
Specifically, taking carbon fiber with a certain length, one end of the carbon fiber is fixed on the first winding screw rod 1, a fiber tow 3 is wound on the second winding screw rod 2 by natural tension, and finally the other end of the carbon fiber is also fixed on the first winding screw rod 1.
Referring to fig. 1 and 7, the glue tank 23 is filled with a sufficient amount of glue solution, and when the fiber tows 3 are placed in the glue tank 23, the fiber tows 3 can be completely immersed in the glue solution, thereby completing the dipping process.
To ensure uniformity of the glue solution, a magnetic stirrer is installed at the bottom of the glue tank 23, not shown in the figure, and the vertical distance between the magnetic stirrer and the filament bundle is at least 5-8 cm. The magnetic stirrer ensures the mixing uniformity of the resin, the curing agent and the solvent in the glue solution. Meanwhile, in order to avoid the glue solution from being solidified to different degrees so as to influence the performance of the glue solution, the glue tank 23 is a constant-temperature glue tank, and a temperature control device is arranged in the glue tank, so that the temperature is constant through setting the temperature.
Wherein the glue solution comprises the following components in parts by mass: 100 parts of epoxy resin, 80-120 parts of curing agent and 100-200 parts of solvent. The epoxy resin is preferably at least one of a glycidyl ester type epoxy resin, a glycidyl ether type epoxy resin, and a 4, 4-diaminodiphenyl ether tetraglycidyl epoxy resin. The curing agent is preferably at least one of phthalic anhydride, tetrahydrophthalic anhydride, glycerol trimellitate or polyazelaic anhydride. The solvent is preferably at least one of acetone, toluene and xylene.
Specifically, immersing the frame wound with multifilament in the glue solution for 5-15 min, and then draining the glue for 3-7 min, so as to ensure the full combination of the glue solution and the fibers and the full infiltration.
Referring to fig. 1 and 4, the support assembly includes a first lower support plate 8 and a second lower support plate 9, and the first lower support plate 8 and the second lower support plate 9 are symmetrically installed above the glue groove 23 in a "C" shape structure. The bottom inside the first lower support plate 8 and the second lower support plate 9 is provided with a reinforcing sheet positioning groove 19, and the reinforcing sheet positioning groove 19 is used for placing the lower reinforcing sheet 21. The upper reinforcing sheet 20 is installed at the bottom ends of the first upper platen 12 and the second upper platen 13.
In the embodiment of the utility model, the reinforcing sheet can be at least one of kraft paper, carbon fiber composite material and sand paper which are cured by dipping. Wherein, the thickness of the upper reinforcing sheet 20 is 0.5-1.5 mm, the center of the lower reinforcing sheet 21 is provided with a groove, the depth is 2-4 mm, and a fixed amount of resin can be injected into the groove.
Referring to fig. 1 and 7, a tensioning structure is arranged between the filament winding assembly and the supporting assembly, and can pull the filament winding assembly to apply tension to the fiber tows 3, so that consistency of the tension of the impregnated sample strips and flatness and uniformity of stress among the monofilaments in the sample strips are ensured, and the impregnated fiber tows 3 are aired for 10-30 min at room temperature. Wherein the tensioning structure applies a tension of 30 to 50N to the fiber bundle 3.
Referring to fig. 1, the tensioning structure comprises a winding screw rod fixing block 4 and a sliding component, wherein the winding screw rod fixing block 4 is respectively and movably connected with a group of winding screw rods 1 and 2. The wire winding rod fixing blocks 4 on the first wire winding rod 1 and the second wire winding rod 2 are respectively and slidably arranged at the bottom ends of the first lower supporting plate 8 and the second lower supporting plate 9 through sliding components.
The sliding component comprises a tensioning sliding block 5, a tensioning bolt 6 and a sliding groove 7, wherein the sliding groove 7 is fixedly installed below a first lower supporting plate 8 and a second lower supporting plate 9 respectively, the tensioning sliding block 5 is in sliding connection with the inside of the sliding groove 7, the tensioning sliding block 5 is fixedly connected with a wire winding rod fixing block 4, a screw hole is formed in the tensioning sliding block 5, and one side of the tensioning bolt 6 penetrates through the screw hole in the tensioning sliding block 5 and is in rotary connection with the sliding groove 7.
Specifically, the tensioning bolt 6 is rotated to drive the tensioning sliding block 5 to slide in the sliding groove 7, so that the winding screw rod fixing block 4 is driven to move outwards, tension is gradually applied to the fiber tows 3, flatness and consistency of tension among monofilaments after gum dipping are ensured, and meanwhile, along with the increase of the tension applied to the fiber tows 3, redundant glue solution in the fiber tows 3 is extruded.
Wherein, referring to fig. 2, the first winding screw 1 and the second winding screw 2 are both rotatably connected with the corresponding winding screw fixing block 4, so that the first winding screw 1 and the second winding screw 2 can both rotate upwards by 180 degrees, and the fiber tow 3 is overturned to the inner parts of the first lower supporting plate 8 and the second lower supporting plate 9 to be stuck with the reinforcing sheet.
Referring to fig. 7, the tensioning structure may further include a winding rod fixing block 4 and a sliding structure, where the winding rod fixing block 4 is fixedly installed on a set of the bottom ends of the first lower support plate 8 and the second lower support plate 9, and the first winding rod 1 and the second winding rod 2 are slidably installed on the winding rod fixing block 4 at the bottom ends of the first lower support plate 8 and the second lower support plate 9 through the sliding structure, respectively.
Referring to fig. 7 and 8, the sliding structure includes a square groove 31, a fastening nut 32, a threaded pull rod 33 and a square block 34, the square groove 31 is formed on one side of the wire winding rod fixing block 4, the square block 34 is slidably connected inside the square groove 31, the threaded pull rod 33 is fixedly connected on one side of the square block 34, the fastening nut 32 is movably mounted on one side of the wire winding rod fixing block 4, and the fastening nut 32 is matched with the threaded pull rod 33.
Specifically, the fastening nut 32 is turned, the threaded pull rod 33 is pulled outwards by the fastening nut 32, so that the square block 34 slides towards the inside of the square groove 31, any first winding screw 1 or second winding screw 2 can be driven to move outwards, tension is gradually applied to the fiber tows 3, the straightness and the consistency of the tension among monofilaments after gum dipping are ensured, and meanwhile, along with the increase of the tension applied to the fiber tows 3, redundant glue solution in the fiber tows is extruded.
Wherein, first around lead screw 1 and second around lead screw 2 all rotate with the square piece 34 that corresponds to be connected for first around lead screw 1 and second around lead screw 2 all can upwards rotate 180, thereby overturn fibrous silk bundle 3 to the inside of first lower backup pad 8 and second lower backup pad 9 and paste the reinforcement piece.
Referring to fig. 1 and 2, a turnover handle 22 which can elastically stretch and retract is further installed between the first winding rod 1 and the second winding rod 2, so that turnover operation is facilitated.
The pressing structure is mounted on the supporting component and used for pressing and pasting the reinforcing sheet on the end portion of the fiber tows 3. Wherein the pressure applied by the compacting structure is 100-200N.
Referring to fig. 1 and 7, the pressing structure includes a lifting assembly and an upper pressing plate, the lifting assembly is respectively installed on the first lower support plate 8 and the second lower support plate 9 in a group, the upper pressing plate is fixedly installed on the lifting assembly, and the upper pressing plate includes a first upper pressing plate 12 and a second upper pressing plate 13.
Referring to fig. 2 and 3, the lifting assembly includes a first moving ball 10, a second moving ball 11, a first moving screw 14, a second moving screw 15, a first rotating handle 16 and a second rotating handle 17, where threaded holes are respectively formed in the first lower support plate 8 and the second lower support plate 9, the bottom end of the first moving screw 14 penetrates through the threaded holes in the first lower support plate 8 and is fixedly connected with the first moving ball 10, the first moving ball 10 is fixedly connected with the first upper press plate 12, the first rotating handle 16 is fixedly connected with the top end of the first moving screw 14, the bottom end of the second moving screw 15 penetrates through the threaded holes in the second lower support plate 9 and is fixedly connected with the second moving ball 11, the second moving ball 11 is fixedly connected with the second upper press plate 13, and the second rotating handle 17 is fixedly connected with the top end of the second moving screw 15.
Specifically, the first moving screw 14 is rotated by the first rotating handle 16, so that the first moving screw 14 is rotated and lifted in the threaded hole on the first lower supporting plate 8, and the first moving ball 10 and the first upper pressing plate 12 installed at the bottom of the first moving ball are driven to lift. Similarly, the second moving screw 15 is rotated by the second rotating handle 17, so that the second moving screw 15 drives the second moving ball 11 and the second upper pressing plate 13 arranged at the bottom of the second moving ball to lift. The reinforcement sheet can be pressed and stuck to both ends of the fiber bundles 3 by lifting and lowering the first upper press plate 12 and the second upper press plate 13.
Referring to fig. 7 in combination with fig. 2 and 3, the lifting assembly includes a first spring 24, a second spring 25, a first movable slide bar 26, a second movable slide bar 27, a first pull block 28 and a second pull block 29, in which the first lower support plate 8 and the second lower support plate 9 are respectively provided with a telescopic hole, the bottom end of the first movable slide bar 26 penetrates the telescopic hole in the first lower support plate 8 and is fixedly connected with the first upper press plate 12, the first pull block 28 is fixedly connected with the top end of the first movable slide bar 26, the first spring 24 is sleeved outside the first movable slide bar 26, the bottom end of the second movable slide bar 27 penetrates the telescopic hole in the second lower support plate 9 and is fixedly connected with the second upper press plate 13, the second pull block 29 is fixedly connected with the top end of the second movable slide bar 27, and the second spring 25 is sleeved outside the second movable slide bar 27.
Referring to fig. 7, the first movable slide bar 26 and the second movable slide bar 27 are respectively provided with a through hole, and a limit pin 30 is inserted into the through holes. The limiting pins 30 on the first movable slide bar 26 and the second movable slide bar 27 can play a limiting role, and prevent the first spring 24 and the second spring 25 from resetting after being compressed.
Specifically, the limiting pins 30 on the first movable slide bar 26 and the second movable slide bar 27 are removed, downward pressure is applied to the first upper pressing plate 12 and the second upper pressing plate 13 by means of the elasticity of the springs, and the reinforcing sheet is bonded under the action of the pressure of the first upper pressing plate 12 and the second upper pressing plate 13.
Notably, the impregnated fiber tows 3 adhere the reinforcing sheet under tension, avoiding creep of the cured spline during the secondary reinforcing process.
The method for preparing the large-tow carbon fiber multifilament stretching spline by one-step molding comprises the following steps:
s1, winding a fiber silk bundle 3 between a first winding screw 1 and a second winding screw 2 in a natural tension state;
s2, immersing the wound fiber tows 3 into a glue tank 23 filled with glue solution for glue dipping;
s3, taking out the fiber tows 3 after gum dipping from the gum groove 23, and draining the gum, and airing at room temperature;
s4, pulling the first winding screw 1 or the second winding screw 2 through a tensioning structure, and applying tension to the impregnated fiber tows 3;
s5, driving the first upper pressing plate 12 and the second upper pressing plate 13 to move upwards through the lifting assembly respectively to enable gaps between the first upper pressing plate 12 and the second upper pressing plate 13 and the lower supporting plates on the first lower supporting plate 8 and the second lower supporting plate 9 to be gradually increased, installing the reinforcing sheet 20 below the first upper pressing plate 12 and the second upper pressing plate 13, installing the lower reinforcing sheet 21 in the reinforcing sheet positioning groove 19, and rotating the first winding screw 1 and the second winding screw 2 by 180 degrees into the limiting grooves 18 on the first lower supporting plate 8 and the second lower supporting plate 9 to enable the fiber tows 3 to be turned between the upper reinforcing sheet 20 and the lower reinforcing sheet 21;
s6, injecting quantitative resin into the grooves on the lower reinforcing sheet 21;
and S7, applying downward pressure to the first upper pressing plate 12 and the second upper pressing plate 13 through the lifting assembly, so that the upper reinforcing sheet 20 and the lower reinforcing sheet 21 are bonded under the action of the pressure of the first upper pressing plate 12 and the second upper pressing plate 13.
S8, heating and curing the fiber tows 3 bonded with the upper reinforcing sheet 20 and the lower reinforcing sheet 21 to obtain test bars.
In the embodiment of the utility model, the heating curing temperature is 100-200 ℃, and the curing time is 100-200 min.
In the embodiment of the present utility model, the fiber bundle 3 is preferably 24 to 60k, and accordingly, 5 to 20N when natural tension is applied.
Specifically, when the fiber tow 3 is 24k, the tension is 5 to 10N; when the fiber tows 3 are 36k, the tension is 10-15N; when the fiber bundle 3 is 48k, 50k or 60k, the tension is 15 to 20N.
The following are several embodiments of the present utility model:
example 1:
the domestic T700S-24K carbon fiber multifilament is wound between the first winding screw rod 1 and the second winding screw rod 2 by adopting 5N tension, 100 parts by mass of glycidyl ether type epoxy resin, 80 parts by mass of tetrahydrophthalic anhydride and 100 parts by mass of acetone are sequentially added into the glue groove 23, the internal temperature of the glue groove 23 is set, a magnetic stirrer is started, and the glue solution is uniformly mixed. Immersing the wound multifilament in the glue solution for 5min to ensure that the glue solution is not used for the fiber bundle and the glue dipping is sufficient.
Taking out after 5min, draining for 3min, airing at room temperature for 10min, adopting kraft paper reinforcing sheet impregnated with resin, injecting 2mL of resin into grooves on the lower reinforcing sheet 21, applying 100N pressure on the reinforcing sheet, then placing into a blast drying oven for curing, cooling and cutting into 30cm multifilament sections, wherein the multifilament curing process is (80 ℃/0.5 h) + (120 ℃/1.5 h), and the tensile properties of the large-tow carbon fiber multifilament are shown in table 1.
Example 2:
and winding the bench plastic TC35-48K carbon fiber multifilament between the first winding screw 1 and the second winding screw 2 by adopting 10N tension, sequentially adding 100 parts by mass of glycidyl ether type epoxy resin, 90 parts by mass of tetrahydrophthalic anhydride and 140 parts by mass of acetone into the glue groove 23, setting the internal temperature of the glue groove 23, starting a magnetic stirrer, and uniformly mixing the glue solution. Immersing the wound multifilament in the glue solution for 10min to ensure that the glue solution is not used for the fiber bundle and the glue dipping is sufficient.
Taking out after 10min, draining glue for 5min, airing at room temperature for 20min, adopting impregnated sand paper to strengthen the sheet, injecting 3mL of resin into grooves on the lower strengthening sheet 21, applying 150N pressure to the strengthening sheet, then putting into a blast drying box for curing, cooling and cutting into 30cm multifilament sections, wherein the multifilament curing process is (80 ℃/0.5 h) + (120 ℃/2 h), and the tensile properties of the large-tow carbon fiber multifilament are shown in table 1.
Example 3:
the TR330-50K carbon fiber multifilament yarn of mitsubishi japan was wound between the first winding screw 1 and the second winding screw 2 using a 10N tension, 100 parts by mass of glycidyl ether type epoxy resin, 90 parts by mass of tetrahydrophthalic anhydride and 140 parts by mass of acetone were sequentially added to the glue tank 23, the internal temperature of the glue tank 23 was set, and a magnetic stirrer was turned on, and the glue solution was uniformly mixed. Immersing the wound multifilament in the glue solution for 10min to ensure that the glue solution is not used for the fiber bundle and the glue dipping is sufficient.
Taking out after 10min, draining glue for 5min, airing at room temperature for 20min, adopting impregnated sand paper to strengthen the sheet, injecting 3mL of resin into grooves on the lower strengthening sheet 21, applying 150N pressure to the strengthening sheet, then putting into a blast drying box for curing, cooling and cutting into 30cm multifilament sections, wherein the multifilament curing process is (80 ℃/0.5 h) + (120 ℃/2 h), and the tensile properties of the large-tow carbon fiber multifilament are shown in table 1.
Example 4:
a TRH50-60K carbon fiber multifilament yarn of Mitsubishi corporation of Japan was wound between the first winding screw 1 and the second winding screw 2 with 15N tension, 100 parts by mass of glycidyl ether type epoxy resin, 100 parts by mass of tetrahydrophthalic anhydride and 180 parts by mass of acetone were sequentially added to the glue tank 23, the temperature inside the glue tank 23 was set, and a magnetic stirrer was turned on to mix the glue solution uniformly. Immersing the wound multifilament in the glue solution for 15min to ensure that the glue solution is not used for the fiber bundle and the glue dipping is sufficient.
Taking out after 15min, draining for 7min, airing at room temperature for 30min, adopting a composite material reinforcing sheet, injecting 5mL of resin into a groove on the lower reinforcing sheet 21, applying 200N pressure to the reinforcing sheet, then putting into a forced air drying oven for solidification, cooling and cutting into 30cm multifilament sections, wherein the multifilament solidification process is (80 ℃/0.5 h) + (120 ℃/2.5 h), and the tensile properties of the large-tow carbon fiber multifilament are shown in table 1.
Comparative example 1
The test values of the two-step method for manually preparing domestic T700SC-24K carbon fiber multifilament tensile bars are shown in Table 1.
Comparative example 2
Test values for bench plastic TC35-48K carbon fiber multifilament tensile bars prepared by two-step manual process are shown in table 1.
Comparative example 3
The test values for the two-step process for manually preparing the Mitsubishi TR330-50K carbon fiber multifilament tensile bars are shown in Table 1.
Comparative example 4
The test values of the two-step method for manually preparing TRH50-60K carbon fiber multifilament tensile bars of Mitsubishi corporation are shown in Table 1.
TABLE 1 high filament bundle carbon fiber multifilament tensile properties parameter table
According to the utility model, the large-tow carbon fiber multifilament tensile property spline is prepared by adopting a one-step method, the spline and the reinforcing plate are simultaneously cured, the damage to the spline caused by the reinforcing process of the reinforcing plate is reduced, the problem of debonding and sliding of the prepared sample in the reinforcing process is avoided, in addition, the fiber bundle dipping curing and the reinforcing plate reinforcing curing are simultaneously carried out, the sample preparation time is shortened, the sample preparation efficiency is improved, the appearance of the sample is smooth, and the test result is stable.
The foregoing descriptions of specific exemplary embodiments of the present utility model are presented for purposes of illustration and description. It is not intended to limit the utility model to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the utility model and its practical application to thereby enable one skilled in the art to make and utilize the utility model in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the utility model be defined by the claims and their equivalents.
Claims (9)
1. The device for preparing the large-tow carbon fiber multifilament stretching spline by one-step molding is characterized by comprising the following components:
the winding assembly comprises a first winding screw rod and a second winding screw rod, and the first winding screw rod and the second winding screw rod are used for winding fiber tows;
the glue tank is internally provided with glue solution;
the support assembly comprises a first lower support plate and a second lower support plate, and the first lower support plate and the second lower support plate are symmetrically arranged above the glue groove and are used for assisting carbon fiber multifilament impregnation and pasting reinforcing sheets;
a tensioning structure disposed between the filament winding assembly and the support assembly, the tensioning structure being capable of pulling the filament winding assembly to apply tension to the carbon fiber multifilament yarn;
and the pressing structure is arranged on the supporting component and used for pressing and pasting the reinforcing sheet on the end parts of the carbon fiber multifilament.
2. The apparatus for preparing a large-tow carbon fiber multifilament tension spline by one-step molding according to claim 1, wherein the tensioning structure comprises a winding rod fixing block and a sliding assembly, the winding rod fixing blocks are movably connected with one group on the first winding rod and the second winding rod respectively, and the winding rod fixing blocks on the first winding rod and the second winding rod are slidably installed at the bottom ends of the first lower supporting plate and the second lower supporting plate respectively through the sliding assembly.
3. The device for preparing the large-tow carbon fiber multifilament stretching spline by one-step molding according to claim 2, wherein the sliding assembly comprises a tensioning sliding block, a tensioning bolt and a sliding groove, wherein a group of sliding grooves are fixedly installed below the first lower supporting plate and the second lower supporting plate respectively, the tensioning sliding block is slidably connected in the sliding groove, the tensioning sliding block is fixedly connected with the filament winding rod fixing block, a screw hole is formed in the tensioning sliding block, and one side of the tensioning bolt penetrates through the screw hole in the tensioning sliding block and is in rotary connection with the sliding groove.
4. The apparatus for preparing a large-tow carbon fiber multifilament tension spline by one-step molding according to claim 1, wherein the tension structure comprises a winding rod fixing block and a sliding structure, the winding rod fixing block is fixedly installed at the bottom ends of the first lower support plate and the second lower support plate respectively in a group, and the first winding rod and the second winding rod are slidably installed on the winding rod fixing blocks at the bottom ends of the first lower support plate and the second lower support plate respectively through the sliding structure.
5. The apparatus for preparing a large-tow carbon fiber multifilament tension spline by one-step molding according to claim 4, wherein the sliding structure comprises a square groove, a fastening nut, a threaded pull rod and a square block, the square groove is formed on one side of the filament winding rod fixing block, the square block is slidably connected inside the square groove, the threaded pull rod is fixedly connected on one side of the square block, the fastening nut is movably mounted on one side of the filament winding rod fixing block, and the fastening nut is matched with the threaded pull rod.
6. The apparatus for preparing a large tow carbon fiber multifilament tension spline according to claim 1, wherein the pressing structure comprises a lifting assembly and an upper pressing plate, the lifting assembly is respectively installed on the first lower supporting plate and the second lower supporting plate, the upper pressing plate is fixedly installed on the lifting assembly, and the upper pressing plate comprises a first upper pressing plate and a second upper pressing plate.
7. The apparatus for preparing a large-tow carbon fiber multifilament tensile spline by one-step molding according to claim 6, wherein the lifting assembly comprises a first movable ball head, a second movable ball head, a first movable screw rod, a second movable screw rod, a first rotating handle and a second rotating handle, threaded holes are respectively formed in the first lower support plate and the second lower support plate, the bottom end of the first movable screw rod penetrates through the threaded holes in the first lower support plate and is fixedly connected with the first movable ball head, the first movable ball head is fixedly connected with the first upper pressure plate, the first rotating handle is fixedly connected with the top end of the first movable screw rod, the bottom end of the second movable screw rod penetrates through the threaded holes in the second lower support plate and is fixedly connected with the second movable ball head, the second movable ball head is fixedly connected with the second upper pressure plate, and the second rotating handle is fixedly connected with the top end of the second movable screw rod.
8. The apparatus for preparing a large-tow carbon fiber multifilament stretching spline by one-step molding according to claim 6, wherein the lifting assembly comprises a first spring, a second spring, a first movable slide bar, a second movable slide bar, a first pull block and a second pull block, wherein the first lower support plate and the second lower support plate are respectively provided with a telescopic hole, the bottom end of the first movable slide bar penetrates through the telescopic hole in the first lower support plate and is fixedly connected with the first upper pressure plate, the first pull block is fixedly connected with the top end of the first movable slide bar, the first spring is sleeved outside the first movable slide bar, the bottom end of the second movable slide bar penetrates through the telescopic hole in the second lower support plate and is fixedly connected with the second upper pressure plate, the second pull block is fixedly connected with the top end of the second movable slide bar, and the second spring is sleeved outside the second movable slide bar.
9. The apparatus for preparing a large tow carbon fiber multifilament tension spline by one-step molding according to claim 8, wherein the first moving slide bar and the second moving slide bar are respectively provided with a through hole, and a limiting pin is inserted in the through holes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321943611.0U CN220207227U (en) | 2023-07-24 | 2023-07-24 | Device for preparing large-tow carbon fiber multifilament stretching spline through one-step molding |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321943611.0U CN220207227U (en) | 2023-07-24 | 2023-07-24 | Device for preparing large-tow carbon fiber multifilament stretching spline through one-step molding |
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