A graphite mold surface oxidation-resistant coating preparation device

Abstract

The utility model discloses a kind of graphite mould surface oxidation-resistant coating preparation devices, belong to graphite mould coating preparation technical field, including diffusion flow guide seat, deposition tank is installed on it, rotating clamp is rotatably installed in the deposition tank;Driving mechanism, it is to drive rotating clamp rotation;Wherein, diffusion plate is installed in the inner bottom of diffusion flow guide seat, and several symmetrically arranged flow guide plates are fixedly connected on it.The technical points are: deposition gas is evenly divided into several strands when ascending, and then uniformly flows out from diffusion flow guide seat through the flow guide cavity formed by flow guide plate separation, ascends along deposition tank, and then makes the workpiece mounted on rotating clamp can be uniformly and synchronously deposited processing, and driving mechanism can drive rotating clamp rotation, so that workpiece can be synchronized with rotation, ensure that multiple faces of workpiece have opportunity to be vertically and positively contacted with ascending deposition airflow, more evenly and comprehensively complete film layer deposition work.

Description

Technical Field

[0001] This utility model relates to the field of graphite mold coating preparation technology, specifically a device for preparing an antioxidant coating on the surface of a graphite mold. Background Technology

[0002] Graphite molds are prone to oxidation and damage in high-temperature, oxygen-rich environments, making the preparation of an anti-oxidation coating crucial for extending their service life. Common preparation methods include chemical vapor deposition (CVD), which can form dense and uniform coatings such as SiC with strong adhesion but is costly; and slurry methods, which involve brushing on a ceramic-metal mixture slurry and sintering at high temperatures, offering a simple and low-cost process, but with slightly inferior uniformity. In addition, embedding methods, sol-gel methods, and nanocomposite ceramic coatings effectively prevent oxygen penetration by forming glassy oxide or ceramic layers. When choosing a method, it is necessary to comprehensively consider process costs, coating performance, and production scale to achieve a balance between high-efficiency protection and economy.

[0003] Utility model announcement CN217127298U discloses a device for preparing silicon carbide coating on graphite surface. Its structure includes a housing with an air inlet and an air outlet. The air inlet is located at the bottom of the housing, and the air outlet is located at the top. An airflow diffuser is provided at the air inlet. This utility model provides a device for preparing silicon carbide coating on graphite surface, which, compared to traditional vapor deposition devices, has a simple structure and excellent diffusion capability for the deposition airflow, preventing the airflow from acting vertically on the sample surface and improving the deposition rate of vapor deposition.

[0004] Although the above-mentioned device has good diffusion ability and improves the deposition rate of vapor deposition, the limited range of the gas flow diffuser makes it difficult to ensure that the gas used for deposition is evenly distributed throughout the entire chamber after the diffusion period. Therefore, the deposition degree of the suspended workpieces to be deposited may vary, resulting in large differences in the quality of the finished product. At the same time, since the workpieces to be deposited are fixedly suspended in the chamber and cannot be moved or rotated, only the downward-facing surface can be deposited relatively completely and efficiently. The side surfaces, being parallel to the airflow direction, will result in poor deposition. In summary, to address the above problems, a device for preparing an anti-oxidation coating on the surface of a graphite mold is proposed. Utility Model Content

[0005] To address the technical problems in comparative technologies, such as the limited effective diffusion range of gas in graphite mold coating preparation devices, making it difficult to achieve uniform distribution within the chamber, and the difficulty in ensuring uniform deposition on all surfaces due to the immobility of the workpiece, this invention provides a device for preparing an anti-oxidation coating on the surface of a graphite mold.

[0006] The technical solution adopted by the embodiments of this application to solve its technical problem is: An apparatus for preparing an antioxidant coating on the surface of a graphite mold includes a diffusion guide seat on which a deposition box is mounted. Several rotating clamps arranged vertically and horizontally are rotatably mounted in the deposition box. The rotating clamps are used to clamp and fix the graphite mold on which the coating is to be prepared. A driving mechanism is used to drive the rotating clamps to rotate. A diffusion plate is installed at the bottom of the diffusion guide seat, and several guide plates arranged symmetrically are fixedly connected to it. The guide plates divide the internal space of the diffusion guide seat into several guide cavities of equal width.

[0007] In one possible implementation, the diffuser plate includes a curved plate with a plurality of diffuser grooves arranged in a circular array thereon, and the bottom end of the guide plate is connected between the diffuser grooves.

[0008] In one possible implementation, the top of the diffusion guide seat is provided with several outflow grooves that correspond one-to-one with the guide cavity, wherein a mesh plate is embedded therein.

[0009] In one possible implementation, the rotating fixture includes a base plate on which a plurality of grippers arranged in a circumferential array are slidably mounted, and a rear cover plate is fixedly connected to the back of the base plate, on which a rotating shaft that is rotatably connected to the deposition box is fixedly disposed.

[0010] In one possible implementation, a plurality of guide rails are fixedly provided on the back of the substrate, and the grippers are slidably disposed in the corresponding guide rails. The grippers have mating grooves on both sides, in which clamping springs are installed. Anti-disengagement protrusions are fixedly provided at the ends of the guide rails to abut against the ends of the clamping springs.

[0011] In one possible implementation, the drive mechanism includes a motor bracket fixedly mounted on the back of the deposition tank, on which a drive motor is mounted, and the drive motor drives the corresponding shaft to rotate via a belt drive mechanism.

[0012] In one possible implementation, the belt drive mechanism includes drive wheels fixedly mounted at the ends of the rotating shaft and the drive motor shaft, and the drive wheels in the same row are connected by a drive belt.

[0013] In one possible implementation, an air inlet is fixedly provided at the bottom of the diffusion guide seat, and an air outlet is fixedly provided at the top of the deposition box.

[0014] In summary, this utility model has the following beneficial technical effects: By setting up a diffusion guide seat, the deposition gas can be evenly divided into several streams by the arc-shaped diffusion plate when it rises. Then, the flow channel formed by the guide plate flows out evenly from the diffusion guide seat and rises along the deposition box, so that the workpiece mounted on the rotating fixture can be deposited evenly and synchronously. Furthermore, since the rotating fixture is rotatably mounted on the deposition chamber and can rotate under the drive of the drive mechanism, the workpieces fixedly mounted on each rotating fixture can rotate synchronously. This ensures that multiple surfaces of the workpiece have the opportunity to make vertical and positive contact with the rising deposition gas flow, so that multiple surfaces of the workpiece can complete the film deposition work relatively uniformly and comprehensively. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the mold installation structure of this utility model; Figure 3 This is a schematic diagram of the rotating clamp structure of this utility model; Figure 4 This is a schematic diagram of the diffusion guide seat structure of this utility model; Figure 5 This is a partial structural diagram of the rotating clamp of this utility model.

[0016] In the diagram: 1. Diffusion guide seat; 11. Air inlet; 12. Outlet groove; 13. Mesh plate; 2. Diffusion plate; 21. Curved plate; 22. Diffusion groove; 3. Guide plate; 4. Deposition box; 41. Air outlet; 5. Rotating clamp; 51. Base plate; 511. Guide rail; 512. Anti-detachment protrusion; 52. Clamping claw; 521. Mating groove; 53. Rear cover plate; 54. Rotating shaft; 55. Clamping spring; 6. Drive mechanism; 61. Motor bracket; 62. Drive motor; 63. Transmission wheel; 64. Transmission belt. Detailed Implementation

[0017] The technical solution in this application embodiment is to solve the problems mentioned in the background art, and the overall idea is as follows: like Figure 1 As shown, this embodiment provides a graphite mold surface anti-oxidation coating preparation device, including a diffusion guide seat 1, on which a deposition box 4 is installed. Several rotating clamps 5 arranged vertically and horizontally are rotatably installed in the deposition box 4. The rotating clamps 5 are used to clamp and fix the graphite mold to be coated. A driving mechanism 6 is used to drive the rotating clamps 5 to rotate. A diffusion plate 2 is installed at the bottom of the diffusion guide seat 1, and several guide plates 3 arranged symmetrically are fixedly connected to it. The guide plates 3 divide the internal space of the diffusion guide seat 1 into several guide cavities of equal width.

[0018] Based on the above structural scheme, during the ascent process, the deposition gas will first pass through the arc-shaped diffuser plate 2 and be evenly divided into several streams. Then, it will flow out evenly from the diffuser seat 1 through the guide cavity formed by the guide plate 3 and rise along the deposition box 4. This allows the workpiece mounted on the rotating fixture 5 to be deposited evenly and synchronously. Since the rotating fixture 5 can rotate under the driving action of the drive mechanism 6, it can ensure that multiple surfaces of the workpiece mounted on the rotating fixture 5 have the opportunity to make vertical and positive contact with the rising deposition gas flow, so as to ensure that multiple surfaces of the workpiece can complete the film deposition work relatively evenly and comprehensively.

[0019] Among them, such as Figure 4 As shown, the diffuser plate 2 includes a curved plate 21 with several diffuser grooves 22 arranged in a circular array. The bottom end of the guide plate 3 is connected between the diffuser grooves 22. When the deposited gas comes into contact with the diffuser plate 2, it will overflow through the diffuser grooves 22, thereby dividing the deposited gas into several streams and improving the uniformity of the distribution of the deposited gas in the deposition box 4. In addition, the top of the diffuser guide seat 1 has several outflow grooves 12 that correspond one-to-one with the guide cavity. A mesh plate 13 is embedded in the grooves. The opening of the outflow grooves 12 can ensure that the outflowing deposited gas flow is evenly distributed in the deposition box 4, thereby improving the deposition effect. The mesh plate 13 can prevent foreign objects from entering the diffuser guide seat 1.

[0020] like Figure 3 , Figure 5 As shown, the rotating fixture 5 includes a base plate 51 on which a plurality of grippers 52 arranged in a circular array are slidably mounted. A rear cover plate 53 is fixedly connected to the back of the base plate 51, and a rotating shaft 54 ​​that is rotatably connected to the deposition box 4 is fixedly mounted on it. In the above structure, since the grippers 52 can extend and slide, they can be adapted to the clamping and fixing of workpieces of different sizes.

[0021] The substrate 51 has several guide rails 511 fixedly arranged on its back side, and the gripper 52 is slidably arranged in the corresponding guide rail 511. The gripper 52 has mating grooves 521 on both sides, in which clamping springs 55 are installed. The end of the guide rail 511 is fixedly provided with an anti-disengagement protrusion 512, which is used to abut the end of the clamping spring 55. Based on the above structural scheme, when the gripper 52 is pulled to move outward, the clamping spring 55 will be compressed. Correspondingly, the clamping spring 55 can apply a pushing force to the gripper 52, making it tend to retract inward. Therefore, it can apply a pushing force to the workpiece placed therein, thereby playing the role of clamping and fixing the workpiece.

[0022] like Figure 2As shown, the drive mechanism 6 includes a motor bracket 61 fixedly mounted on the back of the sedimentation tank 4, on which a drive motor 62 is mounted. The drive motor 62 drives the corresponding rotating shaft 54 ​​to rotate through a belt drive mechanism. The belt drive mechanism includes a transmission wheel 63 fixedly mounted at the end of the rotating shaft 54 ​​and the end of the drive motor 62 shaft. The transmission wheels 63 in the same row are connected by a transmission belt 64. Based on the above structural scheme, when the drive motor 62 is working, it can drive the transmission wheel 63 fixedly connected to it to rotate. Under the transmission action of the transmission belt 64, it can drive all other transmission wheels 63 arranged in the same row to rotate, thereby driving the rotating shaft 54 ​​fixedly connected to the transmission wheel 63 to rotate, thus realizing the rotation drive of the rotating fixture 5 as a whole.

[0023] like Figure 1 , Figure 4 As shown, an air inlet 11 is fixedly installed at the bottom of the diffusion guide seat 1, and an air outlet 41 is fixedly installed at the top of the sedimentation box 4. The above structural scheme provides the necessary structural basis for the flow of sedimentation gas, that is, it flows in from the air inlet 11 and flows out from the air outlet 41 to ensure its smooth flow.

[0024] The working principle and usage process of this utility model: When installing a workpiece, pulling the jaws 52 outwards causes the workpiece to be placed between them. As the jaws 52 move outwards, they compress the clamping springs 55. In turn, the clamping springs 55 apply a pushing force to the jaws 52, causing them to tend to contract inwards. This applies a pushing force to the workpiece placed therein, thereby clamping and fixing the workpiece.

[0025] During deposition, the deposition gas rises and is first evenly divided into several streams by the arc-shaped diffuser plate 2. Then, it flows out evenly from the diffuser seat 1 through the guide cavity formed by the guide plate 3 and rises along the deposition box 4, so that the workpiece mounted on the rotating fixture 5 can be deposited and processed evenly and synchronously.

[0026] Synchronously, when the drive motor 62 is working, it can drive the transmission wheel 63 fixedly connected to it to rotate. Under the transmission action of the transmission belt 64, it can drive all other transmission wheels 63 arranged in the same row to rotate, thereby driving the rotating shaft 54 ​​fixedly connected to the transmission wheel 63 to rotate, realizing the rotation drive of the rotating fixture 5 as a whole. This allows the workpieces fixedly installed on each rotating fixture 5 to rotate synchronously, thereby ensuring that multiple surfaces of the workpiece have the opportunity to make vertical and positive contact with the rising deposition gas flow, so as to ensure that multiple surfaces of the workpiece can complete the film deposition work relatively evenly and comprehensively.

[0027] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An apparatus for preparing an antioxidant coating on the surface of a graphite mold, characterized in that, include: A diffusion guide seat (1) is mounted on which a deposition box (4) is installed. Several rotating clamps (5) arranged vertically and horizontally are rotatably mounted in the deposition box (4). The rotating clamps (5) are used to clamp and fix the graphite mold for preparing the coating. Drive mechanism (6), which is used to drive the rotating clamp (5) to rotate; The diffuser seat (1) has a diffuser plate (2) installed at the bottom, and several symmetrically arranged guide plates (3) are fixedly connected to it. The guide plates (3) divide the internal space of the diffuser seat (1) into several guide cavities of equal width.

2. The apparatus for preparing an antioxidant coating on the surface of a graphite mold according to claim 1, characterized in that: The diffuser plate (2) includes a curved plate (21) on which a plurality of diffuser grooves (22) arranged in a circular array are provided, and the bottom end of the guide plate (3) is connected between the diffuser grooves (22).

3. The apparatus for preparing an antioxidant coating on the surface of a graphite mold according to claim 1, characterized in that: The top of the diffusion guide seat (1) is provided with several outflow grooves (12) that correspond one-to-one with the guide cavity, and a mesh plate (13) is embedded therein.

4. The apparatus for preparing an antioxidant coating on the surface of a graphite mold according to claim 1, characterized in that: The rotating clamp (5) includes a base plate (51) on which a plurality of grippers (52) arranged in a circular array are slidably mounted, and a rear cover plate (53) is fixedly connected to the back of the base plate (51), on which a rotating shaft (54) is fixedly mounted and rotatably connected to the deposition box (4).

5. The apparatus for preparing an antioxidant coating on the surface of a graphite mold according to claim 4, characterized in that: The back of the substrate (51) is fixedly provided with a plurality of guide rails (511), and the gripper (52) is slidably disposed in the corresponding guide rail (511). The gripper (52) has mating grooves (521) on both sides, in which clamping springs (55) are installed. The end of the guide rail (511) is fixedly provided with an anti-detachment protrusion (512) for abutting against the end of the clamping spring (55).

6. The apparatus for preparing an antioxidant coating on the surface of a graphite mold according to claim 4, characterized in that: The drive mechanism (6) includes a motor bracket (61) fixedly installed on the back of the sedimentation tank (4), on which a drive motor (62) is mounted. The drive motor (62) drives the corresponding rotating shaft (54) to rotate through a belt drive mechanism.

7. The apparatus for preparing an antioxidant coating on the surface of a graphite mold according to claim 6, characterized in that: The belt drive mechanism includes a drive wheel (63) fixedly installed at the end of the rotating shaft (54) and the end of the drive motor (62) shaft, and the drive wheels (63) in the same row are connected by a drive belt (64).

8. The apparatus for preparing an antioxidant coating on the surface of a graphite mold according to claim 1, characterized in that: The diffuser seat (1) is fixedly provided with an air inlet (11) at the bottom, and the sedimentation box (4) is fixedly provided with an air outlet (41) at the top.

Images