Continuous production device for inductance-assisted endogenous thermocuring resin-based carbon fibers

Abstract

The invention provides an inductance-assisted endogenous thermosetting resin-based carbon fiber continuous production device, which comprises a transmission assembly and a heating assembly, the heating assembly comprises an AC power supply, a conductive coil, a closed iron core, a carbon fiber tow and an electric conductor, the two ends of the closed iron core are coil end iron cores and carbon fiber end iron cores, the conductive coil is wound on the coil end iron cores, and the carbon fiber tow is wound on the carbon fiber tow. The transmission assembly is used for inputting the carbon fiber tows from one end of the carbon fiber end iron core, spirally advancing in the length direction of the carbon fiber end iron core and finally outputting the carbon fiber tows from the other end of the carbon fiber end iron core, and the two ends of the electric conductor and the carbon fiber tows entering and exiting the carbon fiber end iron core form movable winding connection. The alternating current power supply and the closed iron core are used for heating the carbon fiber tows, the roller set is used for spirally conveying the carbon fiber tows, heating of the continuous carbon fiber tows is achieved according to the principle similar to a transformer, the continuous carbon fiber tows can be applied to continuous production scenes, and heating is more uniform.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon fiber processing, and in particular to a continuous production device for induction-assisted endogenous heat-curing resin-based carbon fibers. Background Art

[0002] Carbon fiber reinforced polymer (CFRP) composites are widely used in a wide range of industries, including aerospace, automotive manufacturing, and sports equipment, due to their lightweight and high strength. Heating carbon fibers to impregnate them with resin or achieve high temperatures is a key carbon fiber processing method. Traditional heating methods typically employ hot presses, autoclaves, high-temperature furnaces, or drying rooms. These utilize external rather than internal heat sources, requiring more external equipment and resulting in high manufacturing and maintenance costs.

[0003] CN117261291 Induction-assisted, endogenous heat-curing resin-based carbon fiber continuous production device discloses a carbon fiber self-heating resin curing method, which relates to the field of fiber composite material molding technology. The method requires placing resin and carbon fiber into a mold cavity, using electrode sheets to cover the two ends of the carbon fiber tow, and connecting the electrode sheets at the two ends to the positive and negative poles of the power supply respectively. Then, the heating is applied to achieve the heating resin curing. The "two ends" required by this technology restricts the shape of the carbon fiber and cannot be used for annular / closed and continuous carbon fiber structures. Heating only the two ends may lead to uneven temperature in the middle area, and requires high electrical and thermal conductivity of the carbon fiber. At the same time, the application scenarios are limited, and the heating area cannot be flexibly adjusted, which is not suitable for continuous industrial production. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the present invention provides a continuous production device for induction-assisted endogenous thermosetting resin-based carbon fibers, which solves the problems raised in the above-mentioned background technology.

[0006] (2) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a continuous production device of induction-assisted endogenous thermosetting resin-based carbon fiber, including a transmission component and a heating component, the heating component including an AC power supply, a conductive coil, a closed iron core, a carbon fiber bundle, and an electric conductor, the two ends of the closed iron core are the coil end iron core and the carbon fiber end iron core, the conductive coil is wound on the coil end iron core, and the two ends are connected to the positive and negative poles of the AC power supply, the transmission component is used to input the carbon fiber bundle from one end of the carbon fiber end iron core, and spirally move along the length direction of the carbon fiber end iron core, and finally output from the other end of the carbon fiber end iron core, the two ends of the electric conductor form a movable winding connection with the carbon fiber bundle entering and exiting the carbon fiber end iron core.

[0008] Preferably, the transmission component includes a conveying trough cylinder, a recovery trough cylinder, and a roller group. The roller group is arranged on the coil end iron core. The raw material carbon fiber tow on the conveying trough cylinder enters one end of the roller group after passing through the electric conductor, and the finished carbon fiber tow output from the other end of the roller group enters the recovery trough cylinder after passing through the electric conductor.

[0009] Preferably, the roller group is a carbon fiber roller. The carbon fiber roller is fixedly sleeved outside the carbon fiber end iron core. A spiral groove is arranged along the length direction of the carbon fiber roller, and the inlet and outlet of the spiral groove respectively correspond to both ends of the electric conductor.

[0010] Preferably, the roller group includes a carbon fiber roller and a feeding roller. The closed iron core is supported by a bracket. The carbon fiber roller and the feeding roller are arranged side by side. The carbon fiber roller is rotatably sleeved outside the carbon fiber end iron core through a roller bearing, and both ends of the feeding roller are pivotally connected to the bracket through roller bearings. Ring grooves one and two are arranged at intervals along the length direction of the carbon fiber roller and the feeding roller, and the carbon fiber tow alternately travels in an N-shaped feeding mode along the length direction of a plurality of ring grooves one and two.

[0011] Preferably, the carbon fiber roller and the feeding roller are vertically or horizontally corresponding.

[0012] Preferably, it further includes an impregnation tank. The impregnation tank is arranged between the electric conductor and the recovery trough cylinder. A thermosetting resin is provided in the impregnation tank, and penetration holes and outlet holes for the carbon fiber tow to enter and exit are arranged at the front and rear ends of the impregnation tank.

[0013] (III) Beneficial effects

[0014] The present invention provides a continuous production device for inductance-assisted endogenic thermosetting resin-based carbon fiber, having the following beneficial effects:

[0015] 1. For the continuous production device of inductance-assisted endogenic thermosetting resin-based carbon fiber, an alternating current power supply and a closed iron core are used to heat the carbon fiber tow, and a roller group is used to helically convey the carbon fiber tow. Through the principle similar to a "transformer", the heating of the continuous carbon fiber tow is realized, which can be applied to continuous production scenarios, has a wider application scenario, and the heating is more uniform.

[0016] 2. For the continuous production device of inductance-assisted endogenic thermosetting resin-based carbon fiber, by setting a rotatable carbon fiber roller and a feeding roller, when the carbon fiber tow is traveling, the carbon fiber roller and the feeding roller rotate synchronously, which can greatly reduce the friction between the carbon fiber tow and the ring grooves one and two, and the wear of the carbon fiber tow is small. Description of the drawings

[0017] Figure 1 A schematic diagram of the roller assembly of the present invention being a carbon fiber roller;

[0018] Figure 2 Schematic diagram of the roller assembly of the present invention comprising a carbon fiber roller and a feed roller;

[0019] Figure 3 This is a schematic diagram of the carbon fiber tow of the present invention entering the annular groove 1 from the annular groove 2.

[0020] In the figure: 1 AC power supply, 2 conductive coil, 3 closed iron core, 31 coil end iron core, 32 carbon fiber end iron core, 4 carbon fiber tow, 5 carbon fiber roller, 51 ring groove 1, 52 spiral groove, 6 feed roller, 61 ring groove 2, 7 electrical conductor, 8 conveying groove drum, 9 recovery groove drum, 10 impregnation tank, 101 penetration hole, 102 penetration hole, 11 rolling bearing, 12 bracket. DETAILED DESCRIPTION

[0021] The embodiment of the present invention provides a continuous production device for induction-assisted endogenous heat-curing resin-based carbon fibers, such as Figures 1-3 As shown, it includes a transmission component and a heating component. The heating component includes an AC power supply 1, a conductive coil 2, a closed iron core 3, a carbon fiber tow 4, and an electrical conductor 7.

[0022] like Figure 1 As shown, the closed core 3 is in a closed ring shape, and the two ends of the closed core 3 are a coil end core 31 and a carbon fiber end core 32 .

[0023] The middle section of the conductive coil 2 is wound around the coil end iron core 31, and both ends are connected to the positive and negative poles of the AC power supply 1. The voltage across the carbon fiber bundle 4 on the carbon fiber drum 5 can be adjusted by changing the number of turns of the conductive coil 2 wound around the coil end iron core 31, thereby controlling the heating efficiency of the carbon fiber bundle 4.

[0024] The transmission component is used to input the carbon fiber tow 4 from one end of the carbon fiber end core 32, and spirally move along the length direction of the carbon fiber end core 32, and finally output it from the other end of the carbon fiber end core 32. The two ends of the electrical conductor 7 form a movable winding connection with the carbon fiber tow 4 entering and exiting the carbon fiber end core 32.

[0025] like Figure 1 As shown, the transmission assembly includes a conveying trough 8, a recovery trough 9, and a roller assembly. The conveying trough 8 is rotatably mounted on a bracket and driven by a motor. The raw carbon fiber tow 4 is wound around the conveying trough 8. The recovery trough 9 is rotatably mounted on a bracket and driven by a motor. It is used to rewind the finished carbon fiber tow 4. The roller assembly is mounted on the coil end core 31.

[0026] When heating, turn on the switch of the AC power supply 1 to generate alternating current. The conductive coil 2 is energized, and both ends of the electric conductor 7 are movably wound and connected to the carbon fiber tow 4 extending from the winding on the roller group, forming a closed loop. Through electromagnetic induction, an induced current is generated in the carbon fiber tow 4 wound on the roller group. According to Joule's law, heat is generated on the carbon fiber tow 4 at this time, realizing heating.

[0027] The raw material carbon fiber tow 4 on the conveying trough cylinder 8 enters one end of the roller group after passing through the electric conductor 7 and spirally travels along the length direction of the roller group. The finished carbon fiber tow 4 output from the other end of the roller group enters the recovery trough cylinder 9 after passing through the electric conductor 7, realizing the dynamic heating of continuous carbon fiber.

[0028] Among them, when the carbon fiber tow 4 passes through the electric conductor 7, the carbon fiber tow 4 winds around at least one circle at the end of the electric conductor 7 and then passes through.

[0029] By controlling the rolling speeds of the conveying trough cylinder 8 and the recovery trough cylinder 9, the heating time of the carbon fiber tow 4 on the roller group can be controlled, thereby controlling the temperature of the carbon fiber tow 4.

[0030] There are two ways for the roller group:

[0031] The first embodiment of the roller group is as Figure 1 shown. The roller group is a carbon fiber roller 5. The carbon fiber roller 5 is fixedly sleeved outside the carbon fiber end iron core 32. A spiral groove 52 is arranged along the length direction outside the carbon fiber roller 5. The inlet and outlet of the spiral groove 52 respectively correspond to both ends of the electric conductor 7. The carbon fiber tow 4 enters the inlet of the spiral groove 52 after passing through the electric conductor 7 and spirally winds along the length direction of the spiral groove 52, and finally is led out from the outlet of the spiral groove 52.

[0032] In the first embodiment, the shape of the carbon fiber roller 5 is fixed, and the traveling power of the carbon fiber tow 4 comes from the pulling of the recovery trough cylinder 9, making the carbon fiber tow 4 spirally travel along the axial direction of the spiral groove 52.

[0033] Although the first embodiment can realize the spiral feeding of the carbon fiber tow 4, the friction between the carbon fiber tow 4 and the spiral groove 52 is relatively large, and the wear of the carbon fiber tow 4 is relatively large. Based on this, the preferred solution of the roller group is the second embodiment.

[0034] The second embodiment of the roller group is as Figures 2-3As shown, the drum group includes a carbon fiber drum 5 and a feed drum 6. The four corners of the closed iron core 3 are supported by brackets 12. The carbon fiber drum 5 and the feed drum 6 are arranged side by side, and the carbon fiber drum 5 and the feed drum 6 can be vertically or horizontally corresponding. In this embodiment, the carbon fiber drum 5 and the feed drum 6 are vertically arranged. The carbon fiber drum 5 is rotatably sleeved outside the carbon fiber end iron core 32 through a drum bearing 11. Both ends of the feed drum 6 are pivotally connected to the bracket 12 through drum bearings 11. The carbon fiber drum 5 and the feed drum 6 are provided with a first annular groove 51 and a second annular groove 61 at intervals along their lengths. The distance between two adjacent first annular grooves 51 is the same as the distance between two adjacent second annular grooves 61.

[0035] The carbon fiber tow 4 travels alternately in an N-shaped feeding mode along the lengths of a number of the first annular grooves 51 and the second annular grooves 61. Specifically, the carbon fiber tow 4 enters from the first annular groove 51 after passing through the electrical conductor 7, bypasses along the bottom of the first annular groove 51 and then goes up and bypasses the top of the first second annular groove 61, then goes down and enters the second first annular groove 51, and bypasses along the bottom of the second first annular groove 51 and then goes up and bypasses the top of the second second annular groove 61, and so on. After the carbon fiber tow 4 bypasses the last second annular groove 61, it is introduced into the electrical conductor 7.

[0036] Compared with the first embodiment, in the second embodiment, during the traveling process of the carbon fiber tow 4, the carbon fiber drum 5 and the feed drum 6 rotate synchronously, which can greatly reduce the friction between the carbon fiber tow 4 and the first annular groove 51 and the second annular groove 61, and the wear of the carbon fiber tow 4 is smaller.

[0037] In another embodiment, the device further includes an impregnation tank 10. The impregnation tank 10 is arranged between the electrical conductor 7 and the recovery drum 9. The impregnation tank 10 is provided with a thermosetting resin. The front and rear ends of the impregnation tank 10 are provided with a penetration hole 101 and an exit hole 102 through which the carbon fiber tow 4 can enter and exit. The already heated carbon fiber tow 4 is driven by the recovery drum 9, passes through the impregnation tank 10 through the penetration hole 101 and the exit hole 102, and is impregnated with the internal thermosetting resin to achieve resin curing.

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous production device for inductance-assisted endogenic heat-curing resin-based carbon fiber, characterized in that: It includes a transmission component and a heating component. The heating component includes an AC power supply (1), a conductive coil (2), a closed iron core (3), a carbon fiber filament bundle (4), and an electrical conductor (7). The two ends of the closed iron core (3) are a coil-end iron core (31) and a carbon fiber-end iron core (32). The conductive coil (2) is wound around the coil-end iron core (31), and its two ends are connected to the positive and negative poles of the AC power supply (1). The transmission component is used to input the carbon fiber filament bundle (4) from one end of the carbon fiber-end iron core (32), and it spirally travels along the length direction of the carbon fiber-end iron core (32), and finally outputs from the other end of the carbon fiber-end iron core (32). The two ends of the electrical conductor (7) form a movable winding connection with the carbon fiber filament bundle (4) entering and leaving the carbon fiber-end iron core (32).

2. The continuous production device of an inductor-assisted endogenously thermosetting resin-based carbon fiber according to claim 1, characterized in that: The transmission component includes a conveying drum (8), a recovery drum (9), and a drum group. The drum group is arranged on the coil-end iron core (31). The raw carbon fiber filament bundle (4) on the conveying drum (8) enters one end of the drum group after passing through the electrical conductor (7), and the finished carbon fiber filament bundle (4) output from the other end of the drum group enters the recovery drum (9) after passing through the electrical conductor (7).

3. The continuous production device of inductance-assisted endogenic heat-curing resin-based carbon fiber according to claim 2, wherein: The drum group is a carbon fiber drum (5). The carbon fiber drum (5) is fixedly sleeved outside the carbon fiber-end iron core (32). A spiral groove (52) is arranged along the length direction outside the carbon fiber drum (5), and the inlet and outlet of the spiral groove (52) respectively correspond to the two ends of the electrical conductor (7).

4. The continuous production device of an inductor-assisted endogenously thermosetting resin-based carbon fiber according to claim 2, characterized in that: The drum group includes a carbon fiber drum (5) and a feed drum (6). The closed iron core (3) is supported by a bracket (12). The carbon fiber drum (5) and the feed drum (6) are arranged side by side. The carbon fiber drum (5) is rotatably sleeved outside the carbon fiber-end iron core (32) through a drum bearing (11). The two ends of the feed drum (6) are pivotally connected to the bracket (12) through drum bearings (11). Annular grooves one (51) and two (61) are arranged at intervals along the length direction on the carbon fiber drum (5) and the feed drum (6). The carbon fiber filament bundle (4) travels alternately in an N-shaped wire feeding manner along the length direction of a plurality of annular grooves one (51) and two (61).

5. The continuous production device of inductance-assisted endogenic thermosetting resin-based carbon fiber according to claim 4, characterized in that: The carbon fiber drum (5) and the feed drum (6) are vertically or horizontally corresponding.

6. The continuous production device of an inductor-assisted endogenously thermosetting resin-based carbon fiber according to claim 1, characterized in that: It further includes an impregnation tank (10). The impregnation tank (10) is arranged between the electrical conductor (7) and the recovery drum (9). A thermosetting resin is provided in the impregnation tank (10). Penetration holes (101) and exit holes (102) for the carbon fiber filament bundle (4) to enter and exit are opened at the front and rear ends of the impregnation tank (10).

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