Synchronous impregnation device for carbon-carbon composite material

Abstract

The utility model discloses a synchronous impregnation device for a carbon-carbon composite material, relates to the technical field of carbon-carbon composite material production, and solves the problems of extremely low recovery efficiency of high-viscosity resin after impregnation and waste in the prior art. Comprising a vertical impregnation tank, a vacuum pump, a clamp, a liquid supply mechanism and a recovery mechanism, and the vacuum pump is communicated with the vertical impregnation tank through a vacuum pipeline; a conical bottom lining is arranged on the inner wall of the dipping tank, a flow guide hole is formed in the center of the bottom of the conical bottom lining, the flow guide hole is connected with a liquid suction port of a filtering circulating pump, and a liquid outlet of the filtering circulating pump is communicated with a recycling temporary storage tank; the liquid supply mechanism comprises a double-loop liquid supply pipeline; the double-loop liquid supply pipeline is respectively connected with the vertical impregnation tank, the molten resin tank and the recovery temporary storage tank; and the clamp is arranged in the vertical impregnating tank and is connected with the inner wall of the tank body. The device has the beneficial effects that resin can be directionally extruded, meanwhile, the resin is separated through centrifugal force, and the recovery efficiency of the resin is improved.

Description

Technical Field

[0001] This utility model relates to the field of carbon-carbon composite material production technology, specifically to a synchronous impregnation device for carbon-carbon composite materials. Background Technology

[0002] Carbon-carbon composites, using carbon fibers and fabrics as reinforcements, are widely used in aerospace, high-end components, and other fields. These composites, with carbon as the matrix, are made through specific processes. Carbon fibers contain inherent pores and defects; the impregnation process fills these pores with a liquid impregnating agent, filling the tiny gaps between the carbon fibers, reducing stress concentration, and improving the composite's fatigue resistance and toughness. Impregnation also reduces the porosity of carbon-carbon composites, fills in surface defects, resulting in a smoother, more even surface and reduced surface roughness.

[0003] Impregnation is a core step in the preparation of carbon-carbon composite materials, and it often employs static immersion or low-speed rotation. However, traditional impregnation equipment generally suffers from a resin utilization rate of less than 60%. Existing equipment relies mainly on gravity flow after impregnation, resulting in extremely low recovery efficiency for high-viscosity resins. A large amount of resin remains at the bottom of the tank and in the gaps between the clamps, leading to a large amount of excess resin adhering to the material surface and causing waste.

[0004] Therefore, this invention proposes a synchronous impregnation device for carbon-carbon composite materials to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a synchronous impregnation device for carbon-carbon composite materials, which solves the problem of extremely low recycling efficiency of high-viscosity resin after impregnation in the prior art, resulting in waste.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A simultaneous impregnation device for carbon-carbon composite materials includes a vertical impregnation tank, a vacuum pump, a clamp, a liquid supply mechanism, and a recovery mechanism. The vacuum pump is connected to the vertical impregnation tank via a vacuum pipe. The inner wall of the impregnation tank is provided with a conical bottom liner, which is detachably connected to the impregnation tank. A guide hole is formed at the center of the bottom of the conical bottom liner, and a spiral recovery assembly is disposed within the guide hole. The guide hole is connected to the suction port of a filter circulation pump, and the outlet of the filter circulation pump is connected to a recovery storage tank. The liquid supply mechanism includes a dual-loop liquid supply pipeline. The dual-circuit liquid supply pipelines are respectively connected to a vertical impregnation tank, a molten resin tank, and a recovery storage tank. A three-way reversing valve is connected at the junction of the liquid supply pipelines. The clamp is set inside the vertical impregnation tank and connected to the inner wall of the tank. A cover is rotatably mounted on the upper end of the vertical impregnation tank. The clamp includes a rotating spindle and a porous bearing plate fixedly connected to the rotating spindle. A centrifugal drive motor is connected to the lower end of the rotating spindle. A pressure cover is set on the top of the inner side of the cover. An elastic buffer pad is connected to the pressure cover. A lifting hydraulic cylinder is connected to the cover corresponding to the pressure cover.

[0008] Furthermore, the inner wall of the impregnation tank is connected with multiple layers of annular guide plates.

[0009] By adopting the above technical solution, the resin can be evenly distributed during the descent process, thereby improving the uniformity of impregnation.

[0010] Furthermore, an adsorption filter element is connected to the bottom of the porous support plate, and the adsorption filter element is connected to the bottom of the support plate through a threaded interface.

[0011] By adopting the above technical solution, the adsorption filter element can simultaneously adsorb resin, reducing the amount of resin adhering to the material surface.

[0012] Furthermore, the spiral recovery assembly includes spiral blades, which are coaxially disposed within the guide hole. The drive shaft of the first drive motor is coaxially connected to the spiral blades, and the first drive motor is connected within the guide hole. The pitch of the spiral blades decreases from top to bottom.

[0013] By adopting the above technical solution, the spiral space below gradually shrinks, which squeezes and pushes the resin, thereby improving the recycling efficiency of high-viscosity resin.

[0014] Furthermore, each of the dual-loop liquid supply pipelines is equipped with a flow control valve and a pressure sensor. The molten resin tank and the recovery storage tank are connected by a solenoid valve, and the pressure sensor is electrically connected to the solenoid valve.

[0015] By adopting the above technical solution, the pressure sensor can monitor the pipeline pressure in real time and feed it back to the solenoid valve, ensuring stable liquid supply pressure, accurately controlling resin flow and pressure, and achieving dynamic balance between the molten resin tank, impregnation tank, and recovery storage tank.

[0016] Furthermore, an antifoamer is connected between the flow guide hole and the filter circulation pump.

[0017] By adopting the above technical solution, air bubbles can be eliminated from the recycled resin, thus realizing the recycling of the resin.

[0018] Furthermore, the recycling storage tank is equipped with multiple filter screens, the mesh size of which decreases sequentially from the inlet to the outlet, and a scraper is provided below the filter screens.

[0019] By adopting the above technical solution, the multi-layer filter screen with decreasing pore size can perform graded filtration of recycled resin, effectively intercepting impurities of different particle sizes. The scraper below the filter screen can collect the residual resin on the filter screen, further improving the recycling rate of high-viscosity resin and reducing the pollution of circulating resin by solid impurities.

[0020] In summary, compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] This invention utilizes a conical bottom liner in conjunction with a spiral recovery assembly to mechanically push and replace gravity flow, thereby generating directional extrusion force on high-viscosity resin and significantly improving the recovery efficiency of resin retained in the tank bottom gap. Simultaneously, the rotating spindle in the fixture drives the porous bearing plate to rotate, using centrifugal force to detach excess resin from the material surface, reducing resin waste. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0023] Figure 2 This is a top view of the present invention;

[0024] Figure 3 This is the front view of the present invention;

[0025] Figure 4 This is a partial cross-sectional view of the main view of this utility model;

[0026] In the diagram: 1. Vertical impregnation tank; 2. Vacuum pump; 3. Vacuum pipeline; 4. Annular guide plate; 5. Conical bottom liner; 6. Guide hole; 7. Spiral blade; 8. First drive motor; 9. Filter circulation pump; 10. Recovery storage tank; 11. Defoamer; 12. Dual-circuit liquid supply pipeline; 13. Molten resin tank; 14. Three-way reversing valve; 15. Flow control valve; 16. Pressure sensor; 17. Filter screen; 18. Scraper; 19. Cover; 20. Rotary spindle; 21. Porous bearing plate; 22. Adsorption filter element; 23. Centrifugal drive motor; 24. Pressing cover; 25. Elastic buffer pad; 26. Lifting hydraulic cylinder; 27. Solenoid valve. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] In this application, the terms "upper," "inner," "outer," "middle," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0029] like Figure 1-4 As shown, a synchronous impregnation device for carbon-carbon composite materials includes a vertical impregnation tank 1, a vacuum pump 2, a clamp, a liquid supply mechanism, and a recovery mechanism. The inner wall of the impregnation tank is connected to multiple layers of annular guide plates 4. The vacuum pump 2 is connected to the vertical impregnation tank 1 via a vacuum pipe 3. A conical bottom liner 5 is provided on the inner wall of the impregnation tank, and the conical bottom liner 5 is detachably connected to the impregnation tank. A guide hole 6 is opened at the center of the bottom of the conical bottom liner 5. A spiral recovery assembly is provided within the guide hole 6, including spiral blades 7. The spiral blades 7 are coaxially arranged within the guide hole 6. The drive shaft of a first drive motor 8 is coaxially connected to the spiral blades 7, and the first drive motor 8 is connected within the guide hole 6. The pitch of the spiral blades 7 decreases from top to bottom. The guide hole 6 is connected to the suction port of a filter circulation pump 9, and the discharge port of the filter circulation pump 9 is connected to a recovery storage tank 10. A defoamer 11 is connected between the guide hole 6 and the filter circulation pump 9.

[0030] Furthermore, the liquid supply mechanism includes a dual-loop liquid supply pipeline 12, which connects to the vertical impregnation tank 1, the molten resin tank 13, and the recovery storage tank 10, respectively. A three-way reversing valve 14 is connected at the junction of the liquid supply pipelines. Each dual-loop liquid supply pipeline 12 is equipped with a flow control valve 15 and a pressure sensor 16. The molten resin tank 13 and the recovery storage tank 10 are connected by a solenoid valve 27, and the pressure sensor 16 is electrically connected to the solenoid valve 27. Multiple filter screens 17 are installed inside the recovery storage tank 10, with the pore size of the filter screens decreasing sequentially from the inlet to the outlet. A scraper plate 18 is installed below the filter screens 17.

[0031] Furthermore, the clamp is installed inside the vertical impregnation tank 1 and connected to the inner wall of the tank. A cover 19 rotates on the upper end of the vertical impregnation tank 1. The clamp includes a rotating spindle 20 and a porous support plate 21 fixedly connected to the rotating spindle 20. An adsorption filter element 22 is connected to the bottom of the porous support plate 21, and the adsorption filter element 22 communicates with the bottom of the support plate through a threaded interface. A centrifugal drive motor 23 is connected to the lower end of the rotating spindle 20. A pressure cover 24 is provided on the top inner side of the cover 19. An elastic buffer pad 25 is connected to the pressure cover 24. A lifting hydraulic cylinder 26 is connected to the cover 19 corresponding to the pressure cover 24.

[0032] The working process of this utility model is as follows:

[0033] First, the carbon-carbon composite material is placed on the porous support plate 21 of the fixture. The cover 19 is rotated and closed, completing the sealing of the vertical impregnation tank 1. Then, the lifting hydraulic cylinder 26 is activated, driving the pressure cover 24 to descend. The elastic buffer pad 25 contacts the workpiece surface and applies appropriate pressure to ensure the workpiece is stably fixed in subsequent operations. Next, the vacuum pump 2 is turned on, and a vacuum is drawn into the vertical impregnation tank 1 through the vacuum pipe 3. The multi-layer annular guide plate 4 helps to evenly distribute the vacuum pressure, allowing the air inside the tank to be quickly discharged, forming a negative pressure environment. The vacuum pump 2 is connected to the vertical impregnation tank 1 through the vacuum pipe 3, which can create a negative pressure environment during the impregnation process, accelerating the penetration of resin into the pores of the carbon-carbon composite material, improving the impregnation uniformity and depth, and avoiding bubble defects caused by air retention. Furthermore, the dual-circuit supply pipeline 12 of the liquid supply mechanism switches the resin source according to the demand through the three-way reversing valve 14. When it is necessary to supply liquid from the molten resin tank 13, the three-way reversing valve 14 switches to the corresponding circuit, the flow control valve 15 controls the resin flow, and the pressure sensor 16 monitors the pipeline pressure in real time and feeds it back to the solenoid valve 27 to ensure stable liquid supply pressure. Molten resin enters the vertical impregnation tank 1 through the liquid supply pipeline. Under the action of negative pressure, the resin permeates into the interior of the workpiece through the porous support plate 21 and the adsorption filter element 22 to realize the impregnation process. The tank is equipped with multiple layers of annular guide plates 4, so that the resin can be evenly distributed during the descent process, improving the uniformity of impregnation.

[0034] After impregnation, some resin begins to flow by gravity, while the spiral recovery assembly functions. The first drive motor 8 drives the spiral blades 7 to rotate. The pitch of the spiral blades 7 decreases from top to bottom, gradually reducing the spiral space below and creating a squeezing and pushing effect on the resin, improving the recovery efficiency of high-viscosity resin. The resin enters the suction port of the filter circulation pump 9 through the guide hole 6. During the transportation process, the defoamer 11 defoams the resin, reducing air bubbles. Then, the filter circulation pump 9 transports the resin to the recovery storage tank 10. The pore size of multiple filter screens 17 in the recovery storage tank 10 decreases sequentially from the inlet to the outlet, performing multi-stage filtration to remove impurities. The scraper plate 18 below the filter screen 17 can periodically scrape off the resin trapped on the filter screen 17, maintaining the filtration effect of the filter screen 17.

[0035] During the resin recovery process, the centrifugal drive motor 23 drives the rotating spindle 20 and the porous bearing plate 21 to rotate, so that the workpiece is centrifuged. Under the action of centrifugal force, the excess resin attached to the surface of the workpiece is thrown off, further reducing resin waste. After the centrifugation and resin recovery are completed, the lifting hydraulic cylinder 26 drives the pressing cover 24 to rise, opens the cover 19, and takes out the impregnated workpiece, completing the entire workflow.

Claims

1. A synchronous impregnation device for carbon-carbon composite materials, comprising a vertical impregnation tank (1), a vacuum pump (2), a clamp, a liquid supply mechanism, and a recovery mechanism, characterized in that, The vacuum pump (2) is connected to the vertical impregnation tank (1) through the vacuum pipe (3); the inner wall of the impregnation tank is provided with a conical bottom liner (5), the conical bottom liner (5) is detachably connected to the impregnation tank, a guide hole (6) is opened at the bottom center of the conical bottom liner (5), a spiral recovery component is provided in the guide hole (6), the guide hole (6) is connected to the liquid suction port of the filter circulation pump (9), and the liquid outlet of the filter circulation pump (9) is connected to the recovery temporary storage tank (10); The liquid supply mechanism includes a dual-circuit liquid supply pipeline (12), which is connected to a vertical impregnation tank (1), a molten resin tank (13), and a recovery storage tank (10) respectively. A three-way reversing valve (14) is connected at the junction of the liquid supply pipelines. The clamp is set inside the vertical impregnation tank (1) and connected to the inner wall of the tank. The vertical impregnation tank (1) has a cover (19) rotating at the upper end. The clamp includes a rotating spindle (20) and a porous bearing plate (21) fixedly connected to the rotating spindle (20). The lower end of the rotating spindle (20) is connected to a centrifugal drive motor (23). A pressure cover (24) is provided on the top of the inner side of the cover (19). An elastic buffer pad (25) is connected to the pressure cover (24). A lifting hydraulic cylinder (26) is connected to the cover (19) corresponding to the pressure cover (24).

2. The synchronous impregnation device for carbon-carbon composite materials according to claim 1, characterized in that, The inner wall of the impregnation tank is connected with multiple annular guide plates (4).

3. The synchronous impregnation device for carbon-carbon composite materials according to claim 1, characterized in that, The bottom of the porous support plate (21) is connected to an adsorption filter element (22), which is connected to the bottom of the support plate through a threaded interface.

4. The synchronous impregnation device for carbon-carbon composite materials according to claim 1, characterized in that, The spiral recovery assembly includes a spiral blade (7), which is coaxially disposed in the guide hole (6). The drive shaft of the first drive motor (8) is coaxially connected to the spiral blade (7). The first drive motor (8) is connected in the guide hole (6). The pitch of the spiral blade (7) decreases from top to bottom.

5. The synchronous impregnation device for carbon-carbon composite materials according to claim 1, characterized in that, Each of the dual-circuit liquid supply pipelines (12) is equipped with a flow control valve (15) and a pressure sensor (16). The molten resin tank (13) and the recovery storage tank (10) are connected by a solenoid valve (27). The pressure sensor (16) is electrically connected to the solenoid valve (27).

6. The synchronous impregnation device for carbon-carbon composite materials according to claim 1, characterized in that, An antifoamer (11) is connected between the flow guide hole (6) and the filter circulation pump (9).

7. The synchronous impregnation device for carbon-carbon composite materials according to claim 1, characterized in that, The recycling storage tank (10) is equipped with multiple filters (17), the pore size of the filters (17) decreases from the inlet to the outlet, and a scraper (18) is provided below the filters (17).

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