A carbon fiber sizing yarn bundling device

Abstract

This application belongs to the field of carbon fiber manufacturing technology, and discloses a carbon fiber sizing yarn bundling device, comprising: an upper roller assembly including an upper roller frame and an upper bundling roller rotatably mounted on the upper roller frame, the upper bundling roller having a first annular groove along its circumference on its surface; a lower roller assembly disposed below the upper roller assembly, including a lower roller frame and a lower bundling roller rotatably mounted on the lower roller frame, the lower bundling roller having a second annular groove along its circumference on its surface; the upper and lower bundling rollers corresponding one-to-one, and a bundling channel forming between the first and second annular grooves; a mounting frame including a sliding groove, with both ends of the upper roller frame slidably disposed within the sliding groove, and both ends of the lower roller frame fixedly disposed on the mounting frame; and a counterweight mechanism mounted on the upper roller frame. By applying pressure through the counterweight mechanism, the bundling channel can apply pressure to the sizing carbon fiber yarn during bundling, thereby squeezing out excess sizing material and compacting it. Simultaneously, during the bundling process, the upper and lower bundling rollers are rotating, resulting in low frictional resistance between them and the yarn.

Description

Technical Field

[0001] This application belongs to the field of carbon fiber manufacturing technology, and in particular relates to a carbon fiber sizing yarn bundling device. Background Technology

[0002] Carbon fiber possesses properties such as high strength, high modulus, high temperature resistance, friction resistance, thermal conductivity, electrical conductivity, and corrosion resistance. Therefore, it can be used as a reinforcing material to be combined with resins to create high-performance composite materials. Composite materials reinforced with continuous carbon fibers exhibit even higher strength and modulus, and their products can be applied in many high-end fields, such as automotive, sports, and aerospace. However, most carbon fiber composite materials currently use thermosetting matrices. Thermoplastic resins, due to their good toughness and reusability, have also become a research hotspot.

[0003] The preparation of carbon fiber-thermoplastic composites by combining carbon fiber with thermoplastic resin typically presents two main challenges. Firstly, for carbon fiber-reinforced thermoplastic resin to better leverage its performance advantages, the interfacial bonding between the fiber and resin must be improved. Good interfacial bonding is fundamental to enhancing the performance of carbon fiber-thermoplastic composites. A commonly effective method to improve interfacial bonding is to apply a thermoplastic slurry to the fiber surface. After slurry application, the interfacial bonding performance between the carbon fiber and resin is significantly improved. Secondly, the soft and fluffy nature of carbon fiber hinders its metering and processing with thermoplastic resin, necessitating a hardening and bundling process.

[0004] Currently, in the production of carbon fiber yarn bundles, the yarn generally needs to undergo sizing and drying. Sizing can protect the yarn on the one hand, and has a bundling function on the other hand, which facilitates subsequent processing and use. Drying after sizing allows the moisture in the sizing liquid on the yarn to evaporate, forming a protective film on the yarn surface, giving the yarn a certain degree of bundling, maintaining the surface gloss of the yarn, and reducing fuzz.

[0005] To prevent the yarn from spreading out during the drying process due to the sizing solution not yet being set, thus affecting subsequent processing, the sized yarn is usually squeezed to remove excess sizing solution, then bundled and pre-shaped before being sent to a high-temperature oven for drying and setting. Currently, bundling tubes are commonly used for bundling. The inner diameter of the bundling tube cannot be changed. When the inner diameter of the bundling tube is larger than the yarn diameter, it is difficult to effectively squeeze out excess sizing solution; when the inner diameter is smaller than the yarn diameter, clogging is likely to occur. However, since the yarn diameter is not strictly uniform, it is difficult to achieve a good bundling effect using bundling tubes. Utility Model Content

[0006] To address the technical problem that existing bundling tubes cannot achieve good bundling effects, this application provides a carbon fiber sizing yarn bundling device.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is a carbon fiber sizing yarn bundling device, comprising,

[0008] The upper roller assembly includes an upper roller frame and at least one upper bundling roller rotatably disposed on the upper roller frame, the surface of the upper bundling roller having a first annular groove along its circumference;

[0009] The lower roller group is located below the upper roller group and includes a lower roller frame and at least one lower bundling roller rotatably mounted on the lower roller frame. The surface of the lower bundling roller has a second annular groove along its circumference. The upper bundling roller and the lower bundling roller correspond one-to-one, and a bundling channel is formed between the first annular groove and the second annular groove.

[0010] The mounting frame includes a slide groove arranged along its height direction, the two ends of the upper roller frame are slidably disposed in the slide groove, and the two ends of the lower roller frame are fixedly disposed on the mounting frame;

[0011] A counterweight mechanism, mounted on the upper roller frame, is configured to apply pressure to the upper roller frame.

[0012] In some embodiments, a guide rod is provided in the chute along its height direction, and the upper roller frame is slidably mounted on the guide rod.

[0013] In some embodiments, a first spring is sleeved on the guide rod, with one end of the first spring abutting against the upper roller frame and the other end abutting against the bottom of the chute.

[0014] In some embodiments, the upper roller frame is provided with a mounting base corresponding to the number of upper clustering rollers, and the upper clustering rollers are rotatably mounted on the mounting base via bearings.

[0015] In some embodiments, the mounting base is provided with a through-hole, the height of which is greater than the height of the upper roller frame. A second spring is provided inside the through-hole, one end of which is fixed to the upper roller frame and the other end of which is fixed to the bottom of the through-hole.

[0016] In some embodiments, the lower clustering roller is rotatably mounted on the lower roller frame via a bearing.

[0017] In some embodiments, the width of the lower bundling roller is smaller than the width of the first annular groove.

[0018] In some embodiments, the upper roller frame has an extension extending to the outside of the mounting frame, and the counterweight mechanism is mounted on the extension.

[0019] In some embodiments, the counterweight mechanism includes a load-bearing frame fixed to the extension and a counterweight block disposed within the load-bearing frame, with the counterweight mechanisms on the extensions at both ends of the upper roller frame symmetrically arranged.

[0020] Beneficial effects: In this application, the upper roller assembly is slidably mounted on the mounting frame, and a counterweight mechanism is configured to apply pressure to it. When the carbon fiber sized yarn is bundled, the bundling channel can apply pressure to it, thereby squeezing out excess sizing material and compacting it. When the yarn diameter suddenly increases, the yarn can overcome the gravity of the counterweight mechanism to support the upper bundling roller, preventing blockage. When the yarn diameter decreases, the upper bundling roller can move closer to the lower bundling roller under the gravity of the counterweight mechanism, narrowing the bundling channel. Simultaneously, during the bundling process, the upper and lower bundling rollers rotate, resulting in low frictional resistance with the yarn, which is beneficial for improving yarn quality and extending the service life of the device. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the bundle-gathering device structure;

[0022] Figure 2 This is a schematic diagram of the assembly structure of the upper roller assembly and the mounting frame;

[0023] Figure 3 This is a sectional view of the assembly structure of the upper roller assembly and the mounting frame.

[0024] In the figure, 10. Upper roller frame, 101. Extension, 11. Upper clustering roller, 111. First annular groove, 12. Mounting seat, 121. Floating hole, 13. Bearing, 14. Second spring, 20. Lower roller frame, 21. Lower clustering roller, 211. Second annular groove, 30. Mounting bracket, 301. Slide groove, 302. Guide rod, 303. First spring, 40. Counterweight mechanism. Detailed Implementation

[0025] The present application will be further described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without making creative changes are within the protection scope of the present application.

[0026] The solution adopted in this utility model is as follows: Figures 1-3As shown, a carbon fiber sizing yarn bundling device includes an upper roller group, a lower roller group, a mounting frame 30, and a counterweight mechanism 40. The upper roller group includes an upper roller frame 10 and at least one upper bundling roller 11 rotatably mounted on the upper roller frame 10. The surface of the upper bundling roller 11 has a first annular groove 111 along its circumference. The lower roller group is located below the upper roller group and includes a lower roller frame 20 and at least one lower bundling roller 21 rotatably mounted on the lower roller frame 20. The surface of the lower bundling roller 21 has a first annular groove 111 along its circumference. The upper and lower rollers 21 have a second annular groove 211 in the circumferential direction. The first and second annular grooves 111 and 211 correspond one-to-one, and the first and second annular grooves 211 cooperate to form a clustering channel. The mounting frame 30 has a sliding groove 301 along its height direction. The two ends of the upper roller frame 10 are slidably disposed in the sliding groove 301, and the two ends of the lower roller frame 20 are fixedly disposed on the mounting frame 30. The counterweight mechanism 40 is mounted on the upper roller frame 10 and is configured to apply pressure to the upper roller frame 10.

[0027] After carbon fiber is sized, the resulting yarn passes through the bundling channel. Under the pressure of the counterweight mechanism 40, the first annular groove 111 of the upper bundling roller 11 squeezes the yarn within the bundling channel, thus squeezing out excess sizing material as the yarn travels, achieving a bundling and pre-forming effect. When the yarn diameter suddenly increases, the yarn can overcome the pressure of the counterweight mechanism 40 and support the upper bundling roller 11, preventing blockage. When the yarn diameter decreases, under the gravity of the counterweight mechanism 40, the upper roller group moves closer to the lower roller group, and the upper bundling roller 11 moves closer to the lower bundling roller 21, causing the height of the bundling channel to decrease accordingly, achieving the same bundling effect. Furthermore, during the bundling process, the yarn's movement drives the upper bundling roller 11 and the lower bundling roller 21 to rotate. The yarn experiences rolling friction with the upper and lower bundling rollers 11 and 21, resulting in a small friction distance, which helps improve yarn quality and extends the equipment's lifespan.

[0028] like Figure 3 As shown, in order to improve the smoothness of the movement of the upper roller frame 10 within the slide groove 301 and to prevent the upper roller frame 10 from deflecting, in some embodiments, a guide rod 302 is provided within the slide groove 301 along its height direction, and the upper roller frame 10 is slidably mounted on the guide rod 302. Specifically, the upper roller frame 10 can be configured with a rectangular cross-section, slidably mounted within the slide groove 301, and slidably sleeved outside the guide rod 302.

[0029] like Figure 3As shown, in order to buffer the sliding movement of the upper roller frame 10 on the guide rod 302, in some embodiments, a first spring 303 is sleeved on the guide rod 302. One end of the first spring 303 abuts against the upper roller frame 10, and the other end abuts against the bottom of the slide groove 301. At the same time, the first spring 303 provides support for the upper roller frame 10. When the counterweight mechanism 40 is removed, the first spring 303 can lift the upper roller frame 10, so that the upper bundling roller 11 is away from the lower bundling roller 21, which facilitates maintenance and other operations.

[0030] like Figure 3 As shown, in order to enable the upper clustering roller 11 to rotate independently on the upper roller frame 10, in some embodiments, the upper roller frame 10 is provided with mounting seats 12 corresponding to the number of upper clustering rollers 11, and the upper clustering roller 11 is rotatably mounted on the mounting seats 12 via bearings 13.

[0031] like Figure 3 As shown, to enable each upper bundling roller 11 to automatically perform independent fine-tuning operations, in some embodiments, the mounting base 12 is provided with a through-hole 121. The height of the floating hole 121 is greater than the height of the upper roller frame 10. A second spring 14 is provided inside the floating hole 121. One end of the second spring 14 is fixed to the upper roller frame 10, and the other end is fixed to the bottom of the floating hole 121. When the diameter of the yarn in a certain bundling channel suddenly increases, the corresponding upper bundling roller 11 receives support from the yarn. Due to the action of the second spring 14, the corresponding upper bundling roller 11 will drive the corresponding mounting base 12 to rise relative to the upper roller frame 10. That is to say, the upper bundling roller 11 can be moved and adjusted independently on the upper roller frame 10 without affecting the operating status of other upper bundling rollers 11. The upper roller frame 10 will only be supported and lifted when the yarn diameter is too large and exceeds the adjustment range of the second spring 14. To prevent the mounting seat 12 from moving axially on the upper roller frame 10 during operation, limiting blocks (not shown in the figure) are fixed on the upper roller frame 10 on both sides of the mounting seat 12. The limiting blocks not only limit the axial movement of the mounting seat 12, but also isolate the mounting seats 12 from each other.

[0032] In order to enable each lower clustering roller 21 to rotate independently on the lower roller frame 20 without affecting each other, in some embodiments, the lower clustering roller 21 is rotatably mounted on the lower roller frame 20 via a bearing 13.

[0033] like Figure 1 As shown, in some embodiments, the width of the lower clustering roller 21 is smaller than the width of the first annular groove 111. When the upper roller assembly is subjected to pressure from the counterweight mechanism 40, the lower clustering roller 21 can penetrate deep into the first annular groove 111, preventing the upper clustering roller 11 and the lower clustering roller 21 from deviating from each other during the clustering process.

[0034] To facilitate the installation of the counterweight mechanism 40, in some embodiments, the upper roller frame 10 has an extension 101 extending to the outside of the mounting frame 30, and the counterweight mechanism 40 is mounted on the extension 101.

[0035] In some embodiments, to facilitate adjustment of the pressure of the counterweight mechanism on the upper roller assembly, the counterweight mechanism 40 includes a load-bearing frame fixed to the extension 101 and counterweight blocks disposed within the load-bearing frame. The counterweight mechanisms 40 on the extensions 101 at both ends of the upper roller frame 10 are symmetrically arranged. By adding counterweight blocks of different weights within the load-bearing frame, the pressure on the upper roller assembly is adjusted, thereby adjusting the pressure on the yarn passing through the bundling channel.

[0036] While the disclosure is as stated above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the scope of protection of this application.

Claims

1. A carbon fiber sizing yarn bundling apparatus characterized by, include, The upper roller assembly includes an upper roller frame (10) and at least one upper bundle roller (11) rotatably disposed on the upper roller frame (10), the surface of the upper bundle roller (11) having a first annular groove (111) along its circumference; The lower roller group is located below the upper roller group and includes a lower roller frame (20) and at least one lower clustering roller (21) rotatably mounted on the lower roller frame (20). The surface of the lower clustering roller (21) has a second annular groove (211) along its circumference. The upper clustering roller (11) and the lower clustering roller (21) correspond one-to-one. A clustering channel is formed between the first annular groove (111) and the second annular groove (211). The mounting frame (30) includes a slide groove (301) arranged along its height direction, the two ends of the upper roller frame (10) are slidably arranged in the slide groove (301), and the two ends of the lower roller frame (20) are fixedly arranged on the mounting frame (30); A counterweight mechanism (40), mounted on the upper roller frame (10), is configured to apply pressure to the upper roller frame (10).

2. The carbon fiber sizing yarn assembly apparatus according to claim 1, wherein, A guide rod (302) is provided in the groove (301) along its height direction, and the upper roller frame (10) is slidably disposed on the guide rod (302).

3. The carbon fiber sizing yarn assembly apparatus of claim 2, wherein, A first spring (303) is sleeved on the guide rod (302). One end of the first spring (303) abuts against the upper roller frame (10), and the other end abuts against the bottom of the slide groove (301).

4. The carbon fiber sizing yarn bunching device according to claim 1 or 2, characterized by, The upper roller frame (10) is provided with mounting seats (12) corresponding to the number of upper bundle rollers (11), and the upper bundle rollers (11) are rotatably mounted on the mounting seats (12) via bearings (13).

5. The carbon fiber sizing yarn bundling device according to claim 4, characterized in that, The mounting base (12) is provided with a through floating hole (121). The height of the floating hole (121) is greater than the height of the upper roller frame (10). A second spring (14) is provided in the floating hole (121). One end of the second spring (14) is fixed to the upper roller frame (10), and the other end is fixed to the bottom of the floating hole (121).

6. The carbon fiber sizing yarn bundling device according to claim 1, characterized in that, The lower clustering roller (21) is rotatably mounted on the lower roller frame (20) via a bearing (13).

7. The carbon fiber sizing yarn bundling device according to claim 1, characterized in that, The width of the lower clustering roller (21) is smaller than the width of the first annular groove (111).

8. The carbon fiber sizing yarn bundling device according to claim 1, characterized in that, The upper roller frame (10) has an extension (101) extending to the outside of the mounting frame (30), and the counterweight mechanism (40) is mounted on the extension (101).

9. The carbon fiber sizing yarn bundling device according to claim 8, characterized in that, The counterweight mechanism (40) includes a load-bearing frame fixed on the extension (101) and a counterweight block disposed in the load-bearing frame. The counterweight mechanisms (40) on the extensions (101) at both ends of the upper roller frame (10) are symmetrically arranged.

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