Adjustable sizing equipment for carbon fiber composite production

Abstract

The utility model provides a kind of adjustable sizing equipment for carbon fiber composite production, including sizing pool, sizing pool is used to store sizing solution;Sizing pool inside is provided with adjustable impregnation guide roller group;Sizing pool outside is provided with adjustable sizing solution circulating pump, adjustable sizing solution circulating pump is communicated with sizing solution in sizing pool inside by pipeline;Sizing pool inner bottom is provided with ultrasonic oscillator;Unwinding drum is set in the top front side of sizing pool;Winding drum is set in the top rear side of sizing pool, and is oppositely arranged with unwinding drum;Drying device is set in the upper portion of sizing pool and is close to winding drum.The utility model aims to provide a kind of adjustable sizing equipment for carbon fiber composite production, by optimizing equipment structure, improve sizing solution penetration uniformity, keep sizing solution concentration uniform, eliminate bubble and unmoistened area, improve drying efficiency, prevent secondary pollution, prolong equipment service life, and can adapt to different specifications of carbon fiber material, to improve the quality and production efficiency of carbon fiber sizing.

Description

Technical Field

[0001] This utility model relates to the field of sizing equipment technology, specifically to an adjustable sizing equipment for the production of carbon fiber composites. Background Technology

[0002] Carbon fiber itself is a brittle material. During the fiber production process and the preparation of carbon fiber composites, when the fiber rubs against the manufacturing equipment and against each other, it is very easy for the fiber filaments to break, resulting in a large number of fuzzy fibers, which leads to a decrease in fiber quality and may even cause production to be unable to proceed smoothly.

[0003] To address this issue, industrially produced carbon fibers typically undergo a sizing process. Sizing involves passing the fibers through a sizing agent of a specific concentration, allowing the active ingredients in the sizing agent to deposit onto the fiber surface. After drying, a protective film of the sizing agent forms on the fiber surface. This film reduces friction between the fibers and equipment, as well as between the fibers themselves, minimizing fuzz formation. Simultaneously, it enhances the interfacial bonding strength between the carbon fiber and the resin matrix, thereby improving the overall performance of the carbon fiber composite.

[0004] Existing sizing equipment has the following problems:

[0005] 1. Problem of slurry penetration uniformity: In traditional sizing equipment, it is difficult to precisely adjust the impregnation path and pressure of carbon fiber materials, resulting in uneven penetration of slurry inside the carbon fiber; some areas have insufficient slurry penetration, while other areas have excessive slurry, which will affect the sizing effect and the performance of composite materials.

[0006] 2. Slurry sedimentation and uneven concentration: Slurry is prone to sedimentation during storage and use, resulting in uneven slurry concentration. After prolonged use, the slurry concentration at the bottom of the slurry tank may increase, while the concentration at the top may decrease, leading to unstable slurry quality for carbon fiber.

[0007] 3. Bubble and Unwetted Area Issues: Bubbles and unwetted areas can easily exist inside the fiber bundle, which reduces the bonding strength between the fiber and the slurry. Completely eliminating these problems affects the performance of the composite material.

[0008] In view of the above-mentioned problems of existing carbon fiber sizing equipment, this utility model aims to provide an adjustable carbon fiber composite sizing device, which solves the above-mentioned technical problems by optimizing the equipment structure. Utility Model Content

[0009] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide an adjustable sizing equipment for the production of carbon fiber composites. By optimizing the equipment structure, it solves the problems of uneven sizing penetration, uneven sizing sedimentation and concentration, air bubbles and unwetted areas in existing sizing equipment.

[0010] Technical solution: An adjustable carbon fiber composite production sizing device, comprising:

[0011] A slurry tank, used for storing slurry;

[0012] An adjustable impregnation guide roller assembly is provided inside the sizing tank;

[0013] An adjustable slurry circulation pump is provided outside the slurry tank, and the adjustable slurry circulation pump is connected to the slurry inside the slurry tank through a pipeline;

[0014] An ultrasonic oscillator is installed at the bottom of the slurry tank.

[0015] A winding drum is positioned at the top front side of the slurry tank;

[0016] The take-up drum is located on the rear side of the top of the slurry tank and is positioned opposite to the unwinding drum.

[0017] A drying device is located above the sizing tank and near the take-up drum.

[0018] The adjustable carbon fiber composite sizing equipment of this utility model includes a sizing tank, an adjustable impregnation guide roller group, an adjustable slurry circulation pump, an ultrasonic vibrator, an unwinding drum, a winding drum, and a drying device. The carbon fiber material is unwound from the unwinding drum, passes through the adjustable impregnation guide roller group in the sizing tank for sizing, and is finally wound up by the winding drum. The adjustable guide roller group adjusts the impregnation path and pressure of the carbon fiber material to optimize the uniformity of slurry penetration. The slurry circulation pump is used to dynamically adjust the slurry flow rate to avoid sedimentation and maintain uniform slurry concentration. The ultrasonic vibrator eliminates air bubbles and unwetted areas through high-frequency oscillation, improving the bonding strength between the fiber and the slurry. The drying device is used to dry the slurry on the fiber surface before winding to prevent secondary contamination and improve production efficiency.

[0019] Furthermore, in the aforementioned adjustable carbon fiber composite production sizing equipment, the sizing tank is a stainless steel tank with an inner wall coated with a corrosion-resistant coating.

[0020] The above design can extend the service life of the slurry tank.

[0021] Furthermore, in the aforementioned adjustable carbon fiber composite production sizing equipment, the adjustable impregnation guide roller group includes a first-stage adjustable guide roller group, a second-stage adjustable guide roller group, and a third-stage adjustable guide roller group. The unwinding drum, the first-stage adjustable guide roller group, the second-stage adjustable guide roller group, the third-stage adjustable guide roller group, and the winding drum are arranged in a "W" shape in height from front to back.

[0022] The "W" shaped path extends the impregnation time, enhancing the penetration depth of the slurry. Furthermore, the multi-stage guide rollers can adjust the fiber tension in stages, preventing excessive stretching or loosening.

[0023] Furthermore, in the aforementioned adjustable carbon fiber composite production sizing equipment, the unwinding drum, the first-stage adjustable guide roller group, the second-stage adjustable guide roller group, the third-stage adjustable guide roller group, and the winding drum are respectively connected to an external connecting drive device.

[0024] The drive unit is used to coordinate the speed of the unwinding drum, guide roller, and take-up drum to ensure consistent fiber material transmission speed. It can also automatically adjust the speed and tension of the unwinding drum, guide roller, and take-up drum according to different fiber specifications.

[0025] Furthermore, in the aforementioned adjustable carbon fiber composite production sizing equipment, the first-stage adjustable guide roller group, the second-stage adjustable guide roller group, and the third-stage adjustable guide roller group each include two guide rollers arranged opposite each other. Bearing seats are installed at both ends of each guide roller, and the bearing seats are connected to the piston rod of a cylinder or hydraulic cylinder. By controlling the extension and retraction of the cylinder or hydraulic cylinder, the gap between the two oppositely arranged guide rollers can be adjusted.

[0026] The gap between the guide rollers is adjusted by a pneumatic / hydraulic cylinder, which can adjust the guide roller spacing in real time to adapt to different fiber thicknesses or impregnation requirements. The mechanical drive ensures synchronous extension and retraction on both sides, avoiding uneven slurry distribution caused by guide roller skew.

[0027] Furthermore, in the aforementioned adjustable carbon fiber composite production sizing equipment, the adjustable slurry circulation pump is a variable frequency centrifugal pump with an adjustable flow rate range of 1-100L / min.

[0028] The adjustable slurry circulation pump uses a variable frequency centrifugal pump with a wide flow adjustment range, which can match different slurry viscosity requirements, avoid splashing caused by excessive flow rate or sedimentation caused by excessive flow rate, and the variable frequency control reduces energy consumption, adapting to the needs of small batch or continuous production.

[0029] Furthermore, in the aforementioned adjustable carbon fiber composite production sizing equipment, the ultrasonic oscillator adopts a 40kHz high-frequency oscillation module and is integrated into the bottom of the sizing tank.

[0030] High-frequency vibration at 40kHz completely eliminates air bubbles inside the fiber bundles and enhances interfacial bonding. In addition, the integrated design at the bottom of the pool ensures that the vibration covers the entire slurry area, leaving no dead corners.

[0031] Furthermore, in the aforementioned adjustable carbon fiber composite production sizing equipment, a heating tank is provided inside the sizing tank, and a heating coil is provided inside the heating tank.

[0032] By installing heating coils, the slurry in the slurry tank can be heated to the optimal wetting temperature, reducing viscosity and accelerating penetration. The heating coils can distribute heat evenly, avoiding local overheating that could cause slurry denaturation.

[0033] Furthermore, in the aforementioned adjustable carbon fiber composite production sizing equipment, the drying device includes two air pumps, which are arranged opposite each other on the left and right outer walls of the upper part of the sizing tank; the air outlet pipe of the air pump passes through the side wall of the sizing tank and extends into the interior of the sizing tank, and a nozzle is provided at one end extending into the interior of the sizing tank.

[0034] The airflow from both sides quickly blows across the fiber surface, shortening the drying time.

[0035] The beneficial effects of this utility model are as follows:

[0036] The adjustable carbon fiber composite production sizing equipment described in this utility model is reasonably designed. It addresses the problems of existing sizing equipment by optimizing the equipment structure, improving the uniformity of sizing penetration, maintaining uniform sizing concentration, eliminating air bubbles and unwetted areas, improving drying efficiency, preventing secondary pollution, extending the service life of the equipment, and adapting to carbon fiber materials of different specifications. This improves the quality and production efficiency of carbon fiber sizing, meeting the market demand for high-quality carbon fiber composite materials. Attached Figure Description

[0037] Figure 1 This is a simplified diagram of the internal layout of the adjustable carbon fiber composite production sizing equipment described in this utility model;

[0038] Figure 2 This is an external schematic diagram of the adjustable carbon fiber composite production sizing equipment described in this utility model;

[0039] In the picture:

[0040] 1. Sizing tank, 11. Heating tank, 12. Heating coil, 2. Adjustable impregnation guide roller assembly, 3. Adjustable slurry circulation pump, 21. First-stage adjustable guide roller assembly, 211. Guide roller, 22. Second-stage adjustable guide roller assembly, 23. Third-stage adjustable guide roller assembly, 4. Ultrasonic vibrator, 5. Unwinding drum, 6. Winding drum, 7. Drying device, 71. Air pump, 72. Nozzle, a. Carbon fiber material. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1 , 2 The present invention will be further illustrated in conjunction with Embodiment 1.

[0042] Example 1

[0043] like Figure 1 , 2 As shown, this embodiment 1 provides an adjustable carbon fiber composite production sizing equipment, including a sizing tank 1, an adjustable impregnation guide roller group 2, an adjustable sizing circulation pump 3, an ultrasonic vibrator 4, an unwinding drum 5, a winding drum 6, and a drying device 7, as detailed below:

[0044] 1. Sizing tank

[0045] The sizing tank 1 is made of 304 stainless steel, with a 5mm thick polytetrafluoroethylene corrosion-resistant coating on the inner wall (temperature resistance range -60℃~260℃). The dimensions of the sizing tank 1 are: 3000mm long × 800mm wide × 600mm high. The sizing tank 1 is equipped with an independent heating tank 11, with a built-in spiral stainless steel heating coil 12 (power 5KW, temperature control accuracy ±1℃).

[0046] 2. Adjustable impregnation guide roller assembly

[0047] The adjustable impregnation guide roller assembly 2 is installed inside the sizing tank 1 and is driven by a drive device (not shown). The adjustable impregnation guide roller assembly 2 adopts a three-stage design, including:

[0048] (1) Spatial layout:

[0049] First-stage guide roller group 21 (low position): submerged 50mm below the slurry surface.

[0050] Second-stage guide roller group 22 (high position): located 200mm above the slurry surface.

[0051] Third-stage guide roller group 23 (low position): submerged 30mm below the slurry surface.

[0052] Movement path:

[0053] The fibers pass through the following sequence: unwinding drum 5 (high position) → first-stage guide roller group 21 (low position) → second-stage guide roller group 22 (high position) → third-stage guide roller group 23 (low position) → take-up drum 6 (high position).

[0054] (2) Guide roller spacing adjustment mechanism

[0055] The gaps between the guide rollers 211 of the first-stage guide roller group 21, the second-stage guide roller group 22, and the third-stage guide roller group 23 are all adjusted by a double-acting cylinder (80mm diameter, 150mm stroke, and equipped with an SMC proportional valve to control the air pressure (0.1-0.8MPa adjustable), not shown in the figure). The spacing of the guide rollers 211 can be adjusted in real time to adapt to different fiber thicknesses or impregnation requirements.

[0056] 3. Adjustable slurry circulation pump

[0057] The adjustable slurry circulation pump 3 is installed on the outside side of the slurry tank 1. The adjustable slurry circulation pump 3 is a Grundfos variable frequency centrifugal pump with a flow range of 1-100L / min (corresponding to a speed of 300-3000rpm), a power of 0.75KW, and a protection level of IP55.

[0058] Piping system: main pipe DN50, branch pipe DN25, and equipped with Y-type filter (100 mesh).

[0059] 4. Ultrasonic oscillator

[0060] Ultrasonic oscillator 4: frequency 40kHz±1kHz, power density 0.5W / cm², 6 oscillators are evenly arranged (in a matrix arrangement at the bottom of the slurry tank 1).

[0061] 5. Winding up and unwinding the drum

[0062] The take-up drum 6 and the unwinding drum 5 are respectively located on the front and rear sides of the top of the slurry tank 1 and are arranged opposite to each other. The take-up drum 6 and the unwinding drum 5 are driven by a drive device (not shown in the figure).

[0063] 6. Drying device

[0064] The drying device 7 uses two high-pressure air pumps 71 (air volume 15m³ / min, air pressure 30kPa).

[0065] The nozzle 72 is a flat fan-shaped nozzle (spray angle 60°, flow rate 5L / min), and the hot air temperature is adjustable (50-120℃).

[0066] The working process of the adjustable carbon fiber composite production sizing equipment described in Example 1 is as follows:

[0067] S1 Preparation stage: Inject slurry into the slurry tank 1 heated to a certain temperature, turn on the slurry circulation pump 3 and set the flow rate, and start the ultrasonic oscillator 4 for preheating.

[0068] S2 Sizing Process: Carbon fiber material a is drawn out from unwinding drum 5 and passes through adjustable impregnation guide roller group 2 in a W-shaped path. The spacing of the first-stage adjustable guide roller group 21 is set to fiber thickness + 2mm. The second-stage adjustable guide roller group 22 can apply a certain pressure. The second-stage adjustable guide roller group 23 performs final shaping. The impregnation time is adjustable from 30 to 120 seconds by controlling the speed of the adjustable impregnation guide roller group 2.

[0069] S3 Post-processing stage: The impregnated fibers pass through the drying device 7, where dual air pumps 71 blow air at a 45° angle from opposite directions. The drying time is 3-5 seconds until the surface moisture content is <3%, and then the fibers are wound up by the winding drum 6.

[0070] In summary, the adjustable carbon fiber composite production sizing equipment described in this utility model has the advantages of high production flexibility and improved efficiency. It can improve the uniformity of sizing penetration, maintain uniform sizing concentration, eliminate air bubbles and unwetted areas, improve drying efficiency, and adapt to carbon fiber materials of different specifications, thereby improving the quality and production efficiency of carbon fiber sizing.

[0071] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A sizing device for adjustable carbon fiber composites, characterized in that, include: A slurry tank (1) is used to store slurry; Adjustable impregnation guide roller assembly (2), the sizing tank (1) is provided with an adjustable impregnation guide roller assembly (2); An adjustable slurry circulation pump (3) is provided outside the slurry tank (1), and the adjustable slurry circulation pump (3) is connected to the slurry inside the slurry tank (1) through a pipeline; An ultrasonic oscillator (4) is provided at the bottom of the slurry tank (1). Unwinding drum (5), which is located on the front side of the top of the slurry tank (1); The take-up drum (6) is located on the rear side of the top of the slurry tank (1) and is opposite to the unwinding drum (5); Drying device (7) is located above the slurry tank (1) and close to the take-up drum (6).

2. The sizing equipment for adjustable carbon fiber composites according to claim 1, characterized in that, The slurry tank (1) is a stainless steel tank with a corrosion-resistant coating on its inner wall.

3. The sizing equipment for adjustable carbon fiber composites according to claim 1, characterized in that, The adjustable impregnation guide roller group (2) includes a first-level adjustable guide roller group (21), a second-level adjustable guide roller group (22), and a third-level adjustable guide roller group (23). The unwinding drum (5), the first-level adjustable guide roller group (21), the second-level adjustable guide roller group (22), the third-level adjustable guide roller group (23), and the winding drum (6) are arranged in a "W" shape in height from front to back.

4. The sizing equipment for adjustable carbon fiber composites according to claim 3, characterized in that, The unwinding drum (5), the first-stage adjustable guide roller group (21), the second-stage adjustable guide roller group (22), the third-stage adjustable guide roller group (23), and the winding drum (6) are respectively connected to an external connecting drive device.

5. The sizing equipment for adjustable carbon fiber composites according to claim 3, characterized in that, The first-stage adjustable guide roller group (21), the second-stage adjustable guide roller group (22), and the third-stage adjustable guide roller group (23) each include two guide rollers (211) arranged opposite each other. Bearing seats are installed at both ends of each guide roller (211). The bearing seats are connected to the piston rod of the cylinder or hydraulic cylinder. By controlling the extension and retraction of the cylinder or hydraulic cylinder, the gap between the two guide rollers (211) arranged opposite each other can be adjusted.

6. The sizing equipment for adjustable carbon fiber composites according to claim 1, characterized in that, The adjustable slurry circulation pump (3) is a variable frequency centrifugal pump with an adjustable flow rate of 1-100 L / min.

7. The sizing equipment for adjustable carbon fiber composites according to claim 1, characterized in that, The ultrasonic oscillator (4) adopts a 40kHz high-frequency oscillation module and is integrated into the bottom of the slurry tank (1).

8. The sizing equipment for adjustable carbon fiber composites according to claim 1, characterized in that, The slurry tank (1) is equipped with a heating tank (11), and the heating tank (11) is equipped with a heating coil (12).

9. The sizing equipment for adjustable carbon fiber composites according to claim 1, characterized in that, The drying device (7) includes two air pumps (71), which are arranged opposite to each other on the upper left and right outer walls of the slurry tank (1). The air outlet pipe of the air pump (71) passes through the side wall of the slurry tank (1) and extends into the interior of the slurry tank (1), and a nozzle (72) is provided at one end extending into the interior of the slurry tank (1).

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