Profiling die for carbon-carbon composite material

Abstract

The utility model relates to the technical field of profiling dies, in particular to a profiling die for a carbon-carbon composite material. Comprising a pressing die base, a pressing die body, building block type pressing frames, an upper pressing frame and a pressing die frame, the pressing die body is arranged on the upper portion of the pressing die base, the building block type pressing frames are rectangular frames with openings in the upper side and the lower side, the building block type pressing frames are stacked in the vertical direction, and the upper pressing frame is arranged at the top of the building block type pressing frame. The outer edge of the upper pressing frame is matched with the inner wall of the building block type pressing frame, the pressing die frame is arranged on the upper portion of the upper pressing frame, and the pressing die base and the pressing die frame are connected through an expansion rod. The device has reliability and stability in long-term use. And meanwhile, the die pressing quality and the die pressing efficiency are also improved. The profiling die is mainly applied to profiling dies of carbon-carbon composite materials.

Description

Technical Field

[0001] The utility model relates to the technical field of compression molds, and more specifically to a compression mold for carbon-carbon composite materials. Background Art

[0002] A mold is a tool that, under the action of external forces, forms a blank into a part with a specific shape and size. It is widely used in blanking, die forging, cold heading, extrusion, powder metallurgy pressing, pressure casting, and compression or injection molding of products such as engineering plastics, rubber, and ceramics. The mold itself has a specific contour or internal cavity shape, which determines the three-dimensional shape of the raw material. Generally speaking, a mold consists of a movable mold and a fixed mold (or a punch and a die), which can be separated or closed. In the separated state, the product can be removed; in the closed state, the raw material can be injected into the mold cavity for forming. As a precision tool, the mold has a complex shape and must withstand the expansion force of the raw material. Therefore, it has high requirements for structural strength, rigidity, surface hardness, surface roughness, and processing accuracy.

[0003] Carbon-carbon composites (C / C composites), as advanced materials with excellent properties, have broad application prospects in aerospace, aviation, automotive, and other fields. The primary raw material for C / C composites is carbon fiber, which is shredded, then ground with resin. After grinding, the composites are pressed into rectangular blocks using a mold. Finally, they are lifted into a furnace by forklift, heated and cured, and then sent to a workshop for graphitization. However, existing technologies for C / C composite pressing molds are limited, leaving significant gaps. Utility Model Content

[0004] To overcome the shortcomings of the prior art, the present invention provides a press mold for carbon-carbon composite materials. The press mold adopts a modular structure, which facilitates assembly and disassembly, speeds up unloading, and facilitates replacement of parts and components when they experience local wear, fatigue fracture, and improves the quality of the press mold.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A compression mold for carbon-carbon composite materials, comprising a compression mold base, a compression mold body, a building block compression frame, an upper compression frame and a compression mold frame, wherein the compression mold body is arranged on the upper part of the compression mold base, the building block compression frame is a rectangular frame with openings on the upper and lower sides, multiple groups of building block compression frames are provided, and multiple groups of building block compression frames are stacked in the vertical direction, the upper compression frame is arranged on the top of the building block compression frame, the outer edge of the upper compression frame is matched with the inner wall of the building block compression frame, the compression mold frame is arranged on the upper part of the upper compression frame, and the compression mold base and the compression mold frame are connected by an expansion rod.

[0007] The die base includes a rectangular outer frame, a short reinforcing tube is provided inside the rectangular outer frame, an I-beam base frame is provided at the bottom of the short reinforcing tube, a hinged base is provided at the outer edge of the rectangular outer frame, and the bottom of the expansion rod is hinged on the hinged base.

[0008] The die body includes a die side plate, an upper die plate and a die bottom plate. The die side plates are provided in four groups. Adjacent die side plates are connected by corner fixing plates. The four groups of die side plates form a rectangular frame with upper and lower openings. The die bottom plate is fixed to the bottom of the rectangular frame surrounded by the die side plates by bolts. The upper die plate is movably arranged in the rectangular frame surrounded by the die side plates. The size of the upper die plate is matched with the inner diameter of the rectangular frame surrounded by the die side plates.

[0009] A plurality of groups of pressing plate I-steels are arranged in parallel on the upper pressing plate, and a hanging ring hole is provided on the upper pressing plate.

[0010] The building block type press frame includes press frame side panels, and the press frame side panels are provided in four groups. The four groups of press frame side panels are combined into a rectangular press frame with upper and lower openings. The rectangular press frame is matched with the rectangular frame body surrounded by the die side panels. The outer side surfaces of the press frame side panels are provided with guide plates, and multiple groups of guide plates are provided along the outer side surfaces of the press frame side panels.

[0011] The upper pressure frame includes a pressure frame outer frame and positioning columns. A lower I-beam and an upper I-beam are arranged in the outer frame. The upper I-beam and the lower I-beam are arranged vertically. The upper I-beam and the lower I-beam are welded and fixed. A first lifting ring nut is provided on the lower I-beam. The positioning columns are arranged around the upper edge of the pressure frame outer frame. The die frame is connected to the pressure frame outer frame through the positioning columns.

[0012] The die frame includes a die outer frame, the die outer frame adopts a rectangular frame, the die outer frame is matched with the die outer frame, the die outer frame (51) is provided with a positioning hole matching the positioning column (45), the die outer frame is provided with a reinforcing rib, the reinforcing rib is provided with a second eye nut, the outer edge of the die outer frame is provided with a screw top seat, the position of the screw top seat is matched with the position of the hinged base, and the top of the expansion rod is connected to the screw top seat.

[0013] The expansion rod includes a sleeve, a telescopic screw and a positioning nut. The sleeve is hinged on the hinged base. The telescopic screw is threadedly connected in the sleeve. The positioning nut is threadedly connected to the telescopic screw.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The modular building block frame is constructed with a step-by-step compression strategy, which not only simplifies the operation process but also enhances the tightness of the compression. Its basic construction unit is a detachable plate assembly, which is convenient for quick installation and disassembly, significantly improving the efficiency of material handling. The design is low-cost and easy to process, while exhibiting excellent compressive strength. A convenient replacement solution is provided for common problems such as local wear and fatigue fracture of parts or components. The equipped expansion rod system can effectively fasten all components together for easy overall transportation and operation. In addition, the frame supports being placed in a curing oven for subsequent processing, optimizing the process flow. In terms of structural characteristics, it exhibits excellent stability and high strength, especially its fatigue resistance is remarkable. It also has high plasticity, excellent corrosion resistance and durability under multiple extrusions, ensuring reliability and stability in long-term use. It also improves the quality and efficiency of the die. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the medium pressure mold base of the utility model;

[0018] Figure 3 This is a schematic diagram of the compression mold body of the utility model;

[0019] Figure 4 This is a front perspective view of the middle die body of the utility model;

[0020] Figure 5 This is a schematic diagram of the building block type pressure frame in the utility model;

[0021] Figure 6 This is a schematic diagram of the upper pressure frame in the utility model;

[0022] Figure 7 This is a schematic diagram of the press mold frame of the utility model;

[0023] In the figure: 1 is the die base, 11 is the rectangular outer frame, 12 is the reinforced short tube, 13 is the I-beam chassis, 14 is the hinged base, 2 is the die body, 21 is the die side plate, 22 is the corner fixing plate, 23 is the upper die plate, 24 is the press plate I-beam, 25 is the die bottom plate, 26 is the eyelet hole, 3 is the building block press frame, 31 is the press frame side plate, 32 is the guide plate, 4 is the upper press frame, 41 is the press frame outer frame, 42 is the lower I-beam, 43 is the upper I-beam, 44 is the first eye nut, 45 is the positioning column, 5 is the die frame, 51 is the die outer frame, 52 is the reinforcing rib, 53 is the second eye nut, 54 is the screw top seat, 6 is the expansion rod, 61 is the sleeve, 62 is the telescopic screw, and 63 is the positioning nut. DETAILED DESCRIPTION

[0024] In order to more clearly understand the above-mentioned purposes, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0026] like Figures 1 to 7 As shown, a compression mold for carbon-carbon composite materials includes a compression mold base 1, a compression mold body 2, a modular compression frame 3, an upper compression frame 4, and a compression mold frame 5. The compression mold body 2 is arranged on the upper part of the compression mold base 1. The modular compression frame 3 is a rectangular frame with openings on the upper and lower sides. The modular compression frames 3 are provided in multiple groups, and the multiple groups of modular compression frames 3 are stacked in the vertical direction. The upper compression frame 4 is arranged on the top of the modular compression frame 3, and the outer edge of the upper compression frame 4 is matched with the inner wall of the modular compression frame 3. The compression mold frame 5 is arranged on the upper part of the upper compression frame 4. The compression mold base 1 and the compression mold frame 5 are connected by an expansion rod 6. During the compression operation, a hydraulic press is used and four workers simultaneously apply downward pressure on the compression mold frame 5, pushing the upper compression frame 4 to move the pressure plate I-beam 24 and the upper compression mold plate 23 of the compression mold body 2 downward. The carbon fiber material in the die body 2 is compressed. After the expansion rod 6 is tightened, the upper die plate 23 is fixed at a lower horizontal position and left to stand for a period of time to complete the compression operation.

[0027] Preferably, the die base 1 comprises a rectangular outer frame 11, within which is positioned a short reinforcing tube 12. An I-beam base 13 is mounted at the bottom of the short reinforcing tube 12. A hinged base 14 is provided at the outer edge of the rectangular outer frame 11, to which the bottom of the expansion rod 6 is hingedly connected. The I-beam base 13 reduces contact with the ground, providing a more stable placement and facilitating forklift transport of the entire die. The hinged base 14, in conjunction with the expansion rod 6, is secured integrally and also provides a foothold for workers to observe.

[0028] Preferably, the die body 2 includes a die side plate 21, an upper die plate 23 and a die bottom plate 25. The die side plates 21 are provided in four groups. Adjacent die side plates 21 are connected by corner fixing plates 22. The four groups of die side plates 21 form a rectangular frame with upper and lower openings. The die bottom plate 25 is fixed by bolts to the bottom of the rectangular frame surrounded by the die side plates 21. The upper die plate 23 is movably arranged in the rectangular frame surrounded by the die side plates 21. The size of the upper die plate 23 is matched with the inner diameter of the rectangular frame surrounded by the die side plates 21.

[0029] Preferably, multiple groups of pressing plate I-beams 24 are arranged in parallel on the upper pressing plate 23, and a hanging ring hole 26 is provided on the upper pressing plate 23. The upper pressing I-beams 24 are used to apply dispersed and stable pressure, and reduce direct contact between the upper pressing frame 4 and the upper pressing plate 23 to avoid mutual squeezing.

[0030] Preferably, the modular press frame 3 includes four sets of press frame side panels 31, which are combined to form a rectangular press frame with upper and lower openings. The rectangular press frame matches the rectangular frame formed by the die side panels 21. Guide plates 32 are provided on the outer surfaces of the press frame side panels 31, and multiple sets of guide plates 32 are provided along the outer surfaces of the press frame side panels 31. Specifically, three modular press frames 3 are placed on the die body 2 for compression, and then the modular press frames 3 are removed one by one and compressed again, until all the modular press frames 3 are completely removed, and then the compression operation is continued on the die body 2. At this point, the product surface is regular, dense, and firm.

[0031] Preferably, the upper pressure frame 4 includes a pressure frame outer frame 41 and positioning columns 45. A lower I-beam 42 and an upper I-beam 43 are arranged in the pressure frame outer frame 41. The upper I-beam 43 and the lower I-beam 42 are arranged vertically. The upper I-beam 43 and the lower I-beam 42 are welded and fixed. A first lifting ring nut 44 is provided on the lower I-beam 42. The positioning columns 45 are arranged around the upper edge of the pressure frame outer frame 41. The die frame 5 is connected to the pressure frame outer frame 41 through the positioning columns 45.

[0032] Preferably, the die frame 5 includes a die outer frame 51, which adopts a rectangular frame. The die outer frame 51 is matched with the die outer frame 41. The die outer frame 51 is provided with a positioning hole matching the positioning column 45. The die outer frame 51 is provided with a reinforcing rib 52, and the reinforcing rib 52 is provided with a second lifting ring nut 53. The outer edge of the die outer frame 51 is provided with a screw top seat 54. The position of the screw top seat 54 is matched with the position of the hinged base 14, and the top of the expansion rod 6 is connected to the screw top seat 54.

[0033] Preferably, the expansion rod 6 includes a sleeve 61, a telescopic screw 62, and a positioning nut 63. The sleeve 61 is hinged to the hinged base 14, the telescopic screw 62 is threaded into the sleeve 61, and the positioning nut 63 is threaded onto the telescopic screw 62. The telescopic screw 62 is flipped and placed into the U-shaped groove of the screw top seat 54, and the positioning nut 63 is rotated to lock the positioning nut on the screw top seat 54.

[0034] To prepare, shred the carbon fiber and mix it with the resin to form 260-270 mesh carbon particles. Assemble the die base 1, die body 2, and three-layer modular press frame 3. Once the panels are assembled, tighten the screws. Place the raw materials prepared in step 1 into the assembled die body 2 and modular press frame 3 and lay them flat. Evenly lay the press plate I-beam 24 on the upper die plate 23. Use a crane to position the upper press frame 4 and die frame 5. Install the expansion rod 6. Hydraulically press the die frame 5 down. Secure the positioning nut 63 with a wrench and let it sit. Remove the next layer of modular press frame 3, hydraulically press down and tighten the positioning nut 63, let it sit, and then remove the next layer of modular press frame 3. This process continues until the final compression is completed on the die body 2, compacting the raw materials layer by layer. Lift the entire die from the bottom using a forklift and place it in the curing oven for curing. The temperature is set at 150°C for 36 hours. The mold is then removed using a forklift, the screws on the corner fixings are unscrewed, and the main body is split into plates, removing the product. After inventory, the products are transported to the workshop for subsequent graphitization.

[0035] The above only describes in detail the preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by ordinary technicians in this field, various changes can be made without departing from the purpose of the present invention, and various changes should be included in the scope of protection of the present invention.

Claims

1. A compression mold for carbon-carbon composite materials, characterized in that: The invention comprises a die base (1), a die body (2), a modular press frame (3), an upper press frame (4) and a die frame (5), wherein the die body (2) is arranged on the upper part of the die base (1), the modular press frame (3) is a rectangular frame with upper and lower openings, a plurality of modular press frames (3) are provided, and the plurality of modular press frames (3) are stacked in a vertical direction, the upper press frame (4) is arranged on the top of the modular press frame (3), the outer edge of the upper press frame (4) is matched with the inner wall of the modular press frame (3), the die frame (5) is arranged on the upper part of the upper press frame (4), and the die base (1) and the die frame (5) are connected by an expansion rod (6).

2. A pressing die for carbon-carbon composite materials according to claim 1, characterized in that: The die base (1) comprises a rectangular outer frame (11), a short reinforcement tube (12) is provided in the rectangular outer frame (11), an I-beam base frame (13) is provided at the bottom of the short reinforcement tube (12), a hinged base (14) is provided at the outer edge of the rectangular outer frame (11), and the bottom of the expansion rod (6) is hinged to the hinged base (14).

3. A pressing die for carbon-carbon composite materials according to claim 2, characterized in that: The die body (2) comprises a die side plate (21), an upper die plate (23) and a die bottom plate (25). The die side plates (21) are provided in four groups. Adjacent die side plates (21) are connected by corner fixing plates (22). The four groups of die side plates (21) form a rectangular frame with upper and lower openings. The die bottom plate (25) is fixedly arranged at the bottom of the rectangular frame surrounded by the die side plates (21) by bolts. The upper die plate (23) is movably arranged in the rectangular frame surrounded by the die side plates (21). The size of the upper die plate (23) is matched with the inner diameter of the rectangular frame surrounded by the die side plates (21).

4. A pressing die for carbon-carbon composite materials according to claim 3, characterized in that: A plurality of groups of pressing plate I-steels (24) are arranged in parallel on the upper pressing plate (23), and a lifting ring hole (26) is provided on the upper pressing plate (23).

5. The pressing die for carbon-carbon composite materials according to claim 3, characterized in that: The modular press frame (3) includes press frame side panels (31), and the press frame side panels (31) are provided in four groups. The four groups of press frame side panels (31) are combined into a rectangular press frame with upper and lower openings. The rectangular press frame is matched with a rectangular frame body surrounded by the die side panels (21). A guide plate (32) is provided on the outer side surface of the press frame side panel (31), and a plurality of guide plates (32) are provided along the outer side surface of the press frame side panel (31).

6. The pressing die for carbon-carbon composite materials according to claim 5, characterized in that: The upper pressing frame (4) includes a pressing frame outer frame (41) and positioning columns (45). A lower I-beam (42) and an upper I-beam (43) are arranged in the pressing frame outer frame (41). The upper I-beam (43) and the lower I-beam (42) are arranged vertically. The upper I-beam (43) and the lower I-beam (42) are welded and fixed. A first lifting ring nut (44) is arranged on the lower I-beam (42). The positioning columns (45) are arranged around the upper edge of the pressing frame outer frame (41). The die frame (5) is connected to the pressing frame outer frame (41) through the positioning columns (45).

7. The pressing die for carbon-carbon composite materials according to claim 6, characterized in that: The die frame (5) includes a die outer frame (51), the die outer frame (51) is a rectangular frame, the die outer frame (51) is matched with the die outer frame (41), the die outer frame (51) is provided with a positioning hole matching the positioning column (45), the die outer frame (51) is provided with a reinforcing rib (52), the reinforcing rib (52) is provided with a second eye nut (53), the outer edge of the die outer frame (51) is provided with a screw top seat (54), the position of the screw top seat (54) is matched with the position of the hinged base (14), and the top of the expansion rod (6) is connected to the screw top seat (54).

8. The pressing die for carbon-carbon composite materials according to claim 7, characterized in that: The expansion rod (6) comprises a sleeve (61), a telescopic screw (62) and a positioning nut (63); the sleeve (61) is hinged on the hinged base (14); the telescopic screw (62) is threadedly connected in the sleeve (61); and the positioning nut (63) is threadedly connected to the telescopic screw (62).

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