Device for reducing MAO edge effect
By setting up a partition with a window inside the tank, the current is allowed to start ceramicizing from the center of the product, which solves the problem of edge effect during micro-arc oxidation and improves the product's aesthetics and space utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU FIELD TECHNOLOGY GROUP CO LTD
- Filing Date
- 2025-04-16
- Publication Date
- 2026-05-15
AI Technical Summary
During the micro-arc oxidation process, the edges of the product become darker due to the concentrated electric field effect, resulting in a severe edge effect.
A compartment with a window is set in the tank so that the cathode plate is located outside the compartment. The product is hung in the compartment by the anode hanger. The current starts ceramization from the center of the product, and the edge part is outside the window to avoid edge effect.
It effectively reduces the edge effect of the product, prevents the side of the product facing away from the cathode plate from being ceramicized, and improves the product's aesthetics and space utilization.
Smart Images
Figure CN224243257U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of micro-arc oxidation technology, specifically a device for reducing the edge effect of MAO. Background Technology
[0002] During the micro-arc oxidation (MAO) process, the edges of the product are darker in color due to the electric field concentration effect, which is commonly known as the edge effect. This edge effect is very serious, so it is necessary to design a device that can reduce this edge effect. Utility Model Content
[0003] The purpose of this application is to address the shortcomings of existing technologies by setting up a compartment with a window in the tank, so that the cathode plate is located outside the compartment, while the product to be ceramized is hung inside the compartment by an anode hanger. In this way, during the micro-arc oxidation process, the current passes through the window and is ceramized directly from the center of the product, while the edge parts of the product are outside the window, thus solving the problem of how to reduce the edge effect of the product.
[0004] To achieve the above objectives, the technical solution adopted in this application is:
[0005] An apparatus for reducing MAO edge effect includes an upward-opening tank and an anode hanger. A cathode plate is fixedly disposed in the tank. A compartment is fixedly disposed in the tank by an insulating plate. A predetermined gap exists between the compartment and the cathode plate. A window is provided on a side wall A of the compartment facing the cathode plate. The window is located at the center of the side wall A. The area of the side wall A is larger than the area of the window. The anode hanger extends into the compartment. The interior of the compartment is in communication with the interior of the tank.
[0006] Preferably, the cathode plate is disposed on the inner sidewall B of the tank, and the compartment is located on the side of the inner sidewall C of the tank facing the inner sidewall B, with the inner sidewall B and the inner sidewall C being opposite each other.
[0007] Preferably, the cross-section of the tank is rectangular, and a plurality of cathode plates are arranged in series on the inner sidewall B of the tank. The tank contains a plurality of compartments, each compartment having a window, each window corresponding to a cathode plate, and the anode hanger extending into each compartment.
[0008] Preferably, the cathode plates on the inner sidewall B are arranged in a straight line, and the compartments are also arranged in a straight line within the tank, with a predetermined gap between the compartments and the cathode plates.
[0009] Preferably, the projection of the insulating plate onto the inner bottom surface of the groove is U-shaped, the open end of the U-shape of the insulating plate is fixedly connected to the inner sidewall C, the inner sidewall C is parallel to the inner sidewall B, and the end face of the closed end of the U-shape is the sidewall A.
[0010] Preferably, there is a pre-set gap between the lower end of the insulating plate and the inner bottom surface of the groove.
[0011] Preferably, the anode hanger includes a vertical conductive rod, a horizontal conductive rod, a first horizontal mounting rod, a second horizontal mounting rod, an elastic conductive post, and a protrusion. The upper end of the vertical conductive rod is radially connected to the horizontal conductive rod. The first horizontal mounting rod and the second horizontal mounting rod are sequentially fixed on the vertical conductive rod below the horizontal conductive rod. A preset gap exists between the first horizontal mounting rod and the second horizontal mounting rod. Both the first and second horizontal mounting rods are parallel to the horizontal conductive rod. The elastic conductive post is provided on both the first and second horizontal mounting rods. The elastic conductive post is perpendicular to both the horizontal and vertical conductive rods. The elastic conductive post is located on one side of the plane A formed by the first and second horizontal mounting rods. The distance from the free end of all the elastic conductive posts to the plane A is equal. The free end of the elastic conductive post on the first horizontal mounting rod has an upward protrusion, and the free end of the elastic conductive post on the second horizontal mounting rod has a downward protrusion.
[0012] Preferably, a plurality of insulating top posts are provided on the vertical conductive rod between the first horizontal mounting rod and the second horizontal mounting rod. All the insulating top posts are of equal length, and all the insulating top posts and all the elastic conductive hanging posts are located on the same side of the plane A. The free ends of all the insulating top posts are fixedly connected to an insulating top plate. The distance from the side of the insulating top plate facing away from the plane A to the plane A is equal to the distance from the free end of the elastic conductive hanging post to the plane A.
[0013] Preferably, the insulating top plate is made of acrylic material.
[0014] Preferably, each of the first and second transverse mounting rods is provided with two of the aforementioned elastic conductive hanging posts.
[0015] Preferably, the groove body has two slots on the opening edge, and the two ends of the transverse conductive rod are located inside the slots.
[0016] Compared with the prior art, this application has the following beneficial effects:
[0017] 1. This application uses a compartment with a window in the tank, so that the cathode plate is located outside the compartment, while the product to be ceramized is hung inside the compartment by an anode hanger. In this way, during the micro-arc oxidation process, the current passes through the window and is ceramized directly from the center of the product, while the edge part of the product is outside the window, thus solving the problem of how to reduce the edge effect of the product.
[0018] 2. After the insulating top plate is installed in this application, the side of the workpiece facing away from the cathode plate that is hung on the anode fixture is in close contact with the column insulating top plate, thereby preventing the side of the workpiece facing away from the cathode plate from contacting the electrolyte, and thus avoiding the side of the workpiece facing away from the cathode plate from being ceramicized (micro-arc oxidation). Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of this application;
[0020] Figure 2 for Figure 1 Internal structural diagram;
[0021] Figure 3 This is a schematic diagram of the structure of the anode hanger and the insulating plate in one embodiment of this application;
[0022] Figure 4 This diagram shows the relationship between the insulating plate on the anode hanger and the first and second transverse mounting rods.
[0023] Figure 5 for Figure 4 Enlarged view of point A in the middle.
[0024] The components are: 1. Tank; 2. Cathode plate; 3. Side wall A; 4. Window; 5. Inner side wall B; 6. Inner side wall C; 7. Insulating plate; 8. Vertical conductive rod; 9. Horizontal conductive rod; 10. First horizontal mounting rod; 11. Second horizontal mounting rod; 12. Elastic conductive hanging post; 13. Protrusion; 14. Plane A; 15. Insulating top post; 16. Insulating top plate; 17. Tank opening; 18. Liquid inlet pipe; 19. Liquid outlet pipe. Detailed Implementation
[0025] like Figure 1-5 As shown, a device for reducing MAO edge effect includes an upward-opening tank 1 and an anode hanger. A cathode plate 2 is fixedly disposed inside the tank 1. A compartment is fixed inside the tank 1 by an insulating plate 7. A predetermined gap exists between the compartment and the cathode plate 2. A window 4 is provided on the side wall A3 of the compartment facing the cathode plate 2. The window 4 is located in the center of the side wall A3. The area of the side wall A3 is larger than the area of the window 4. The anode hanger extends into the compartment. The interior of the compartment is connected to the interior of the tank 1.
[0026] In this embodiment, during use, the anode hanger is hung on the tank 1, and then the part of the anode hanger used to hang the workpiece extends into the compartment, so that the workpiece can be hung on the anode hanger. At the same time, it is ensured that the shape and size of the workpiece are larger than the window 4, that is, the projection of the window 4 on the side of the workpiece facing the cathode plate is located in the side of the workpiece facing the cathode plate. Then, the electrolyte is put into the tank 1, so that both the workpiece and the cathode plate 2 are submerged in the electrolyte. After energizing, electrons on the cathode plate 2 move through the window 4 towards the workpiece hanging on the anode hanger. Since the area of the window 4 is smaller than the side wall A3 where the window 4 is set, the ceramization (micro-arc oxidation) of the workpiece does not start from the edge, but from the side of the workpiece facing the cathode plate, thereby reducing the edge effect.
[0027] As a preferred embodiment, the cathode plate 2 is disposed on the inner side wall B5 of the tank body 1, which facilitates the fixed installation of the cathode plate 2. The compartment is located on the side of the inner side wall C6 of the tank body 1 facing the inner side wall B5, and the inner side wall B5 is opposite to the inner side wall C6.
[0028] As a preferred embodiment, the cross-section of the tank 1 is rectangular, and a plurality of cathode plates 2 connected in series are provided on the inner sidewall B5 of the tank 1. The tank 1 contains a plurality of compartments, each compartment having a window 4, and each window 4 corresponding to one cathode plate 2. The anode hanger extends into each compartment. This design makes the entire device aesthetically pleasing, facilitates monitoring, and improves the utilization of space within the tank.
[0029] As a preferred embodiment, the cathode plates 2 on the inner sidewall B5 are arranged in a straight line, and the compartments within the tank 1 are also arranged in a straight line, with a predetermined gap between the compartments and the cathode plates 2. This facilitates the installation of the cathode plates 2 and the fabrication of the anode mounting brackets, as the straight line arrangement is easier to manufacture.
[0030] As a preferred embodiment, the projection of the insulating plate 7 onto the inner bottom surface of the tank 1 is U-shaped. The open end of the U-shape of the insulating plate 7 is fixedly connected to the inner sidewall C6, and the inner sidewall C6 is parallel to the inner sidewall B5. The closed end face of the U-shape is the sidewall A3. This arrangement allows a U-shaped insulating plate 7 to form a compartment within the tank 1, making it convenient to create compartments within the tank 1.
[0031] As a preferred embodiment, a pre-set gap is provided between the lower end of the insulating plate 7 and the inner bottom surface of the tank 1. This arrangement allows the electrolyte in the compartment and the tank 1 to flow into each other, meaning the interior of the compartment and the interior of the tank 1 are connected.
[0032] In a preferred embodiment, the anode mounting bracket includes a vertical conductive rod 8, a horizontal conductive rod 9, a first horizontal mounting rod 10, a second horizontal mounting rod 11, an elastic conductive post 12, and a protrusion 13. The upper end of the vertical conductive rod 8 is radially connected to the horizontal conductive rod 9. The first horizontal mounting rod 10 and the second horizontal mounting rod 11 are sequentially fixed to the vertical conductive rod 8 below the horizontal conductive rod 9. A preset gap exists between the first horizontal mounting rod 10 and the second horizontal mounting rod 11. Both the first horizontal mounting rod 10 and the second horizontal mounting rod 11 are parallel to the horizontal conductive rod 9. The first horizontal mounting rod 10... The elastic conductive posts 12 are provided on both the first horizontal mounting rod 10 and the second horizontal mounting rod 11. The elastic conductive posts 12 are perpendicular to both the horizontal conductive rod 9 and the vertical conductive rod 8. The elastic conductive posts 12 are located on one side of the plane A14 formed by the first horizontal mounting rod 10 and the second horizontal mounting rod 11. The free ends of all the elastic conductive posts 12 are equidistant from the plane A14. The free ends of the elastic conductive posts 12 on the first horizontal mounting rod 10 have upward protrusions 13, and the free ends of the elastic conductive posts 12 on the second horizontal mounting rod 11 have downward protrusions 13.
[0033] The workpiece typically subjected to ceramicization is a computer case cover. Since a computer case cover has an edge, during use, the protrusions 13 on the first horizontal mounting rod 10 and the second horizontal mounting rod 11 work together to act as an internal support, holding the workpiece in place. At this point, the workpiece acts as the anode in the electrolyte within the tank 1, and electrons from the cathode plate 2 move onto the workpiece. Because the elastic conductive hanging post 12 is elastic, it is convenient to hang the workpiece on the anode hanger and also convenient to remove it. Multiple vertical conductive rods 8 are installed on a single horizontal conductive rod 9, allowing each vertical conductive rod 8 to extend into a compartment.
[0034] As a preferred embodiment, a plurality of insulating top posts 15 are provided on the vertical conductive rod 8 between the first horizontal mounting rod 10 and the second horizontal mounting rod 11. All the insulating top posts 15 are of equal length, and all the insulating top posts 15 and all the elastic conductive hanging posts 12 are located on the same side of the plane A14. The free ends of all the insulating top posts 15 are fixedly connected to an insulating top plate 16. The distance from the side of the insulating top plate 16 facing away from the plane A14 to the plane A14 is equal to the distance from the free end of the elastic conductive hanging post 12 to the plane A14. After the insulating top plate 16 is set in this way, the side of the workpiece facing away from the cathode plate 2 hanging on the anode hanger is in close contact with the insulating top plate 16, thereby preventing the side of the workpiece facing away from the cathode plate 2 from contacting the electrolyte, and thus avoiding the ceramicization (micro-arc oxidation) of the side of the workpiece facing away from the cathode plate 2.
[0035] As a preferred embodiment, the insulating top plate 16 is made of acrylic material.
[0036] As a preferred embodiment, each of the first transverse mounting rod 10 and the second transverse mounting rod 11 is provided with two of the aforementioned elastic conductive hanging posts 12. This arrangement is intended to ensure that the workpiece is securely hung on the anode hanger.
[0037] As a preferred embodiment, the groove 1 has two slots 17 on its opening edge, and the two ends of the transverse conductive rod 9 are located within the slots 17. With the two slots 17 configured in this way, as... Figure 1-4 As shown, the two ends of the transverse conductive rod 9 can be placed on the groove 1, while ensuring that the transverse conductive rod 9 does not slide in the width direction of the groove 1.
[0038] As a preferred embodiment, the tank 1 is provided with an inlet pipe 18, one end of which connects to the interior of the tank 1, and the other end of which is outside the tank 1; the side wall of the tank 1 is provided with an outlet pipe 19, one end of which connects to the interior of the tank 1, and the other end of which extends through the side wall of the tank 1 to the outside of the tank 1. This facilitates the replacement of the electrolyte in the tank 1. Of course, both the outlet pipe 18 and the inlet pipe 19 are equipped with switching valves, although not shown in the figure, those skilled in the art should know and understand this.
Claims
1. A device for reducing MAO edge effects, characterized in that, The device includes an upward-opening tank (1) and an anode hanger. A cathode plate (2) is fixedly installed inside the tank (1). A compartment is fixed inside the tank (1) by an insulating plate (7). There is a preset gap between the compartment and the cathode plate (2). A window (4) is provided on the side wall A (3) of the compartment facing the cathode plate (2). The window (4) is located in the center of the side wall A (3). The area of the side wall A (3) is larger than the area of the window (4). The projection of the window (4) on the cathode plate (2) is located on the side of the cathode plate (2) facing the window (4). The anode hanger extends into the compartment. The interior of the compartment is connected to the interior of the tank (1).
2. The device for reducing MAO edge effect according to claim 1, characterized in that, The cathode plate (2) is disposed on the inner side wall B (5) of the tank (1), and the compartment is located on the side of the inner side wall C (6) of the tank (1) facing the inner side wall B (5). The inner side wall B (5) is opposite to the inner side wall C (6).
3. The device for reducing MAO edge effect according to claim 2, characterized in that, The cross-section of the tank (1) is rectangular. Several cathode plates (2) are connected in series on the inner sidewall B (5) of the tank (1). Several compartments are provided inside the tank (1). A window (4) is provided on each compartment. Each window (4) corresponds to one cathode plate (2). The anode hanger extends into each compartment.
4. The device for reducing MAO edge effect according to claim 3, characterized in that, The cathode plates (2) on the inner sidewall B (5) are arranged in a straight line, and the compartments are also arranged in a straight line within the tank (1). There is a preset gap between the arrangement of the compartments and the cathode plates (2).
5. The device for reducing MAO edge effect according to claim 4, characterized in that, The projection of the insulating plate (7) on the inner bottom surface of the groove (1) is U-shaped. The open end of the U-shaped insulating plate (7) is fixedly connected to the inner sidewall C (6). The inner sidewall C (6) is parallel to the inner sidewall B (5). The end face of the closed end of the U-shaped is the sidewall A (3).
6. The device for reducing MAO edge effect according to claim 1, characterized in that, A pre-set gap is formed between the lower end of the insulating plate (7) and the inner bottom surface of the groove (1).
7. The device for reducing MAO edge effect according to claim 1, characterized in that, The anode mounting bracket includes a vertical conductive rod (8), a horizontal conductive rod (9), a first horizontal mounting rod (10), a second horizontal mounting rod (11), an elastic conductive post (12), and a protrusion (13). The upper end of the vertical conductive rod (8) is radially connected to the horizontal conductive rod (9). The first horizontal mounting rod (10) and the second horizontal mounting rod (11) are sequentially fixed on the vertical conductive rod (8) below the horizontal conductive rod (9). A preset gap exists between the first horizontal mounting rod (10) and the second horizontal mounting rod (11). Both the first horizontal mounting rod (10) and the second horizontal mounting rod (11) are parallel to the horizontal conductive rod (9). The first horizontal mounting rod (10) and the second horizontal mounting rod (11) are connected to each other. The elastic conductive posts (12) are provided on both horizontal mounting rods (11). The elastic conductive posts (12) are perpendicular to both the horizontal conductive rod (9) and the vertical conductive rod (8). The elastic conductive posts (12) are located on one side of the plane A (14) formed by the first horizontal mounting rod (10) and the second horizontal mounting rod (11). The distance from the free end of all the elastic conductive posts (12) to the plane A (14) is equal. The free end of the elastic conductive posts (12) on the first horizontal mounting rod (10) is provided with an upward protrusion (13), and the free end of the elastic conductive posts (12) on the second horizontal mounting rod (11) is provided with a downward protrusion (13).
8. The apparatus for reducing MAO edge effect according to claim 7, characterized in that, A plurality of insulating top posts (15) are provided on the vertical conductive rod (8) between the first horizontal mounting rod (10) and the second horizontal mounting rod (11). All the insulating top posts (15) are of equal length. All the insulating top posts (15) and all the elastic conductive hanging posts (12) are located on the same side of the plane A (14). The free ends of all the insulating top posts (15) are fixedly connected to an insulating top plate (16). The distance from the side of the insulating top plate (16) facing away from the plane A (14) to the plane A (14) is equal to the distance from the free end of the elastic conductive hanging post (12) to the plane A (14).
9. The apparatus for reducing MAO edge effect according to claim 8, characterized in that, The insulating top plate (16) is made of acrylic material.
10. The apparatus for reducing MAO edge effect according to claim 8, characterized in that, Two elastic conductive hanging posts (12) are provided on the first horizontal mounting rod (10) and the second horizontal mounting rod (11).