Micropore homogenization regulation and control structure of low thermal expansion graphite material

Abstract

The utility model discloses a micropore homogenization regulation and control structure of a low thermal expansion graphite material, which comprises a working table, an opening is arranged on the working table, a ball reciprocating lead screw is arranged on the inner wall of the opening, a mould is fixedly connected on the ball reciprocating lead screw, the mould is in sliding connection with the working table, the top side of the working table is fixedly connected with a support, and the top side of the working table is fixedly connected with the support. A first hot-pressing assembly, a second hot-pressing assembly and a third hot-pressing assembly are arranged at the top of the support, the second hot-pressing assembly and the third hot-pressing assembly are the same as the first hot-pressing assembly in structure, and the first hot-pressing assembly, the second hot-pressing assembly and the third hot-pressing assembly are different in pressure. The first hot pressing assembly comprises a first hydraulic cylinder fixed to the top side of the support, one end of the first hydraulic cylinder is connected with a pressing plate, a first heater is arranged in the pressing plate, and the top side of the pressing plate is fixedly connected with a limiting rod. The device can realize gradient hot pressing of the graphite material, so that the micropore uniformity of the graphite product is realized, and the quality of the graphite product is improved.

Description

Technical Field

[0001] This utility model relates to the field of graphite product processing technology, specifically to a micropore homogenization control structure for low thermal expansion graphite materials. Background Technology

[0002] Graphite product processing is a specialized field that involves transforming graphite materials into products with specific shapes and properties through various processes. Due to its unique physical and chemical properties, such as good electrical conductivity, high temperature resistance, and chemical stability, graphite is widely used in industries such as metallurgy, chemical industry, electronics, and machinery.

[0003] In order to improve the performance of graphite products during the production process, it is necessary to adjust and control the micropores of graphite products. Graphite products usually need to undergo hot pressing treatment during the production process. Traditional hot pressing equipment only performs hot pressing on graphite material once, and the hot pressing effect is poor. As a result, the micropores of graphite products are not uniform, which affects the quality of graphite products and needs to be improved. Utility Model Content

[0004] The purpose of this invention is to provide a micropore uniformity control structure for low thermal expansion graphite materials, so as to solve the problem of uneven micropores in graphite products mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a micropore homogenization control structure for low thermal expansion graphite material, comprising a worktable, an opening on the worktable, a ball reciprocating screw installed on the inner wall of the opening, a mold fixedly connected to the ball reciprocating screw, the mold and the worktable forming a sliding connection, a bracket fixedly connected to the top side of the worktable, and a first hot pressing assembly, a second hot pressing assembly and a third hot pressing assembly arranged on the top of the bracket, the second hot pressing assembly and the third hot pressing assembly having the same structure as the first hot pressing assembly, and the pressures of the first hot pressing assembly, the second hot pressing assembly and the third hot pressing assembly being different;

[0006] The first hot pressing assembly includes a first hydraulic cylinder fixed to the top side of the support, one end of the first hydraulic cylinder is connected to a pressure plate, and the pressure plate is located at the top of the mold.

[0007] Preferably, a first heater is provided inside the pressure plate, and a limit rod is fixedly connected to the top side of the pressure plate. One end of the limit rod passes through the bracket and is located at the top of the bracket, and the limit rod and the bracket form a sliding connection.

[0008] Preferably, the first hot-pressing assembly, the second hot-pressing assembly, and the third hot-pressing assembly are located on the same horizontal line.

[0009] Preferably, a second hydraulic cylinder is fixedly connected to the top of the workbench. There are two sets of the second hydraulic cylinder, with at least two cylinders in each set. One end of the second hydraulic cylinder is connected to a support pin.

[0010] Preferably, blind holes are provided on the outer walls of both ends of the mold, and the blind holes correspond to the positions of the second hydraulic cylinder and the support pin, with one end of the support pin inserted into the blind hole of the mold.

[0011] Preferably, a drive motor is installed on the inner wall of the worktable opening, and one end of the drive motor shaft is connected to the shaft on one side of the ball reciprocating screw via a coupling.

[0012] Preferably, the bottom of the mold is provided with a base plate, and a third heater and a second heater are respectively provided on the base plate and both sides of the mold. A third hydraulic cylinder is installed at the bottom end of the mold, one end of the third hydraulic cylinder is connected to the base plate, and the third hydraulic cylinder is located at one end of the ball reciprocating screw.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) This device can realize gradient hot pressing of graphite materials, thereby achieving uniformity of micropores in graphite products and improving the quality of graphite products.

[0015] (2) This device sets a mold that moves laterally in a straight line on the workbench, and sets a first hot pressing component, a second hot pressing component and a third hot pressing component on the top of the support. The mold moves to the bottom of the first hot pressing component, the second hot pressing component and the third hot pressing component, and hot pressing at different pressures and temperatures can be achieved by the first hydraulic cylinder of the first hot pressing component, the second hot pressing component and the third hot pressing component, thereby improving the uniformity of micropores.

[0016] (3) This device can fix and support the mold after it stops and before hot pressing by setting the second hydraulic cylinder and support pin at the corresponding positions of the bottom of the first hot pressing component, the second hot pressing component and the third hot pressing component at the top of the worktable, so as to ensure the load-bearing capacity of the mold. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the micropore homogenization control structure of a low thermal expansion graphite material according to the present invention.

[0018] Figure 2 This is a cross-sectional view of a micropore homogenization control structure for a low thermal expansion graphite material according to this utility model.

[0019] Figure 3 This invention relates to a micropore homogenization control structure for low thermal expansion graphite materials. Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4This is a top view of the workbench of the micropore homogenization control structure for low thermal expansion graphite material according to this utility model.

[0021] In the diagram: 1. First hot pressing assembly; 101. First heater; 102. Pressure plate; 103. Limiting rod; 104. First hydraulic cylinder; 2. Support; 3. Mold; 4. Second hydraulic cylinder; 5. Worktable; 6. Third hydraulic cylinder; 7. Second hot pressing assembly; 8. Third hot pressing assembly; 9. Ball reciprocating screw; 10. Base plate; 11. Second heater; 12. Drive motor; 13. Third heater; 14. Support pin. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4This utility model provides a technical solution: a micropore uniformity control structure for low thermal expansion graphite material, including a worktable 5 with an opening. A ball reciprocating screw 9 is installed on the inner wall of the opening. A second hydraulic cylinder 4 is fixedly connected to the top of the worktable 5. There are two sets of the second hydraulic cylinder 4, with at least two cylinders in each set. One end of the second hydraulic cylinder 4 is connected to a support pin 14. This structure, by setting multiple sets of second hydraulic cylinders 4 and support pins 14, can ensure the uniformity of support for the mold 3. A drive motor 12 is installed on the inner wall of the opening of the worktable 5. One end of the shaft of the drive motor 12 is connected to the shaft on one side of the ball reciprocating screw 9 through a coupling. The ball reciprocating screw 9 is composed of a fixed seat, a threaded rod, and a screw slide. The top of the screw slide is fixed to the bottom of the mold 3 by bolts. This structure can drive the ball reciprocating screw 9 to run automatically through the drive motor 12, which facilitates the ball reciprocating screw 9 to drive the mold 3 to move horizontally, and facilitates the mold 3 to move horizontally in the first hot pressing assembly 1. The bottom switching positions of the second hot pressing component 7 and the third hot pressing component 8 are connected to a mold 3 fixedly on the ball reciprocating screw 9. The mold 3 is slidably connected to the worktable 5. A bracket 2 is fixedly connected to the top side of the worktable 5. The first hot pressing component 1, the second hot pressing component 7, and the third hot pressing component 8 are set on the top of the bracket 2. The first hot pressing component 1, the second hot pressing component 7, and the third hot pressing component 8 are located on the same horizontal line. The first hydraulic cylinder 104 of the first hot pressing component 1 of this structure performs cold isostatic pre-forming at a pressure of 200MPa and a holding time of 10min, initially densifying the blank to a density of 1.6g / cm³. The first hydraulic cylinder 104 of the second hot pressing component 7 operates at a pressure of 50MPa and a holding time of 1h, causing PMMA to decompose and generate pores, with a temperature increase of 1400℃. The first hydraulic cylinder 104 of the third hot pressing component 8 operates at a pressure of 100MPa and a holding time of 2h, closing large pores and homogenizing micropores, with a temperature increase of 1800℃. Gradient hot pressing is performed as described above, and the porosity decreases from 15% to 8±0.3%, with pore size distribution concentrated to 50~150nm. The first hydraulic cylinders 104 of the first hot pressing assembly 1, the second hot pressing assembly 7, and the third hot pressing assembly 8 are controlled by PLC. The second hot pressing assembly 7 and the third hot pressing assembly 8 have the same structure as the first hot pressing assembly 1, but the pressures of the first hot pressing assembly 1, the second hot pressing assembly 7, and the third hot pressing assembly 8 are different. The first hot pressing assembly 1 includes a first hydraulic cylinder 104 fixed to the top side of the bracket 2. One end of the first hydraulic cylinder 104 is connected to a pressure plate 102, and the pressure plate 102 is internally configured with... A first heater 101 is provided. A limit rod 103 is fixedly connected to the top side of the pressure plate 102. One end of the limit rod 103 passes through the bracket 2 and is located at the top of the bracket 2. The limit rod 103 and the bracket 2 form a sliding connection. This structure can improve the stability of the lifting and lowering of the pressure plate 102 through the limit rod 103. The pressure plate 102 is located at the top of the mold 3. The third hydraulic cylinder 6 and the ball reciprocating screw 9 of this device are not on the same horizontal line, so there is no motion interference. Blind holes are opened on the outer walls of both ends of the mold 3. The blind holes are located at the positions of the second hydraulic cylinder 4 and the support pin 14. Correspondingly, one end of the support pin 14 is inserted into the blind hole of the mold 3. This structure allows the support pin 14 to be automatically inserted into the end of the mold 3 by the second hydraulic cylinder 4, thus ensuring the load-bearing capacity of the mold 3 during the stamping process and protecting the ball reciprocating screw 9. The diameter of the support pin 14 can be determined according to the pressure of the first hydraulic cylinder 104. A base plate 10 is provided at the bottom of the mold 3, and a third heater 13 and a second heater 11 are respectively provided on the base plate 10 and both sides of the mold 3. A third hydraulic cylinder 6 is installed at the bottom of the mold 3, with one end connected to the base plate 10. The third hydraulic cylinder 6 is located at one end of the ball reciprocating screw 9. This structure allows the first heater 101, the third heater 13, and the second heater 11 to be controlled by a PLC for easy temperature switching and adjustment. The first heater 101, the third heater 13, and the second heater 11 can achieve uniform heating of the graphite material, ensuring the quality of hot pressing. The third hydraulic cylinder 6 can automatically lift and lower the base plate 10, facilitating the material discharge from the top of the base plate 10 for easy material removal.

[0024] Working principle: When using the micropore uniformity control structure of this low thermal expansion graphite material, the graphite material is first added into the mold 3. Then, the first hydraulic cylinder 104 of the first hot pressing component 1 pushes the pressure plate 102 to cold press the graphite material. After the cold pressing is completed, the support pin 14 separates from the mold 3. The ball reciprocating screw 9 drives the mold 3 to move to the bottom of the second hot pressing component 7. Then, the support pin 14 is inserted into the mold 3. Subsequently, the first hydraulic cylinder 104 of the second hot pressing component 7 pushes the pressure plate 102 to hot press the graphite material. During the hot pressing process, the first heater 101, the second heater 11 and the third heater 13 of the second hot pressing component 7 are all heated. Finally, the mold 3 moves to the bottom of the third hot pressing component 8 for the last hot pressing, which improves the micropore uniformity of the graphite product.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A micropore homogenization control structure for low thermal expansion graphite material, comprising a worktable (5), characterized in that: An opening is provided on the workbench (5), and a ball reciprocating screw (9) is installed on the inner wall of the opening. A mold (3) is fixedly connected to the ball reciprocating screw (9). The mold (3) and the workbench (5) are in a sliding connection. A bracket (2) is fixedly connected to the top side of the workbench (5). A first hot pressing assembly (1), a second hot pressing assembly (7), and a third hot pressing assembly (8) are provided on the top of the bracket (2). The second hot pressing assembly (7) and the third hot pressing assembly (8) have the same structure as the first hot pressing assembly (1). The pressures of the first hot pressing assembly (1), the second hot pressing assembly (7), and the third hot pressing assembly (8) are different. The first hot pressing assembly (1) includes a first hydraulic cylinder (104) fixed on the top side of the bracket (2), one end of the first hydraulic cylinder (104) is connected to a pressure plate (102), and the pressure plate (102) is located on the top of the mold (3).

2. The micropore homogenization and control structure of a low thermal expansion graphite material according to claim 1, characterized in that: The pressure plate (102) is equipped with a first heater (101). A limit rod (103) is fixedly connected to the top side of the pressure plate (102). One end of the limit rod (103) passes through the bracket (2) and is located at the top of the bracket (2). The limit rod (103) and the bracket (2) form a sliding connection.

3. The micropore homogenization and control structure of a low thermal expansion graphite material according to claim 1, characterized in that: The first hot-pressing assembly (1), the second hot-pressing assembly (7) and the third hot-pressing assembly (8) are located on the same horizontal line.

4. The micropore homogenization and control structure of a low thermal expansion graphite material according to claim 1, characterized in that: The top of the workbench (5) is fixedly connected to a second hydraulic cylinder (4). There are two sets of the second hydraulic cylinder (4), with at least two cylinders in each set. One end of the second hydraulic cylinder (4) is connected to a support pin (14).

5. The micropore homogenization and control structure of a low thermal expansion graphite material according to claim 1, characterized in that: Blind holes are provided on the outer walls of both ends of the mold (3). The blind holes correspond to the positions of the second hydraulic cylinder (4) and the support pin (14). One end of the support pin (14) is inserted into the blind hole of the mold (3).

6. The micropore homogenization and control structure of a low thermal expansion graphite material according to claim 1, characterized in that: The inner wall of the opening of the worktable (5) is equipped with a drive motor (12), and one end of the shaft of the drive motor (12) is connected to the shaft on one side of the ball reciprocating screw (9) through a coupling.

7. The micropore homogenization and control structure of a low thermal expansion graphite material according to claim 1, characterized in that: The bottom of the mold (3) is provided with a base plate (10), and the base plate (10) and the two sides of the mold (3) are respectively provided with a third heater (13) and a second heater (11). A third hydraulic cylinder (6) is installed at the bottom of the mold (3). One end of the third hydraulic cylinder (6) is connected to the base plate (10), and the third hydraulic cylinder (6) is located at one end of the ball reciprocating screw (9).

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