Auxiliary shielding plugs for anodizing aluminum alloy tubular profiles

Abstract

This utility model discloses an auxiliary shielding plug for anodizing aluminum alloy tubular profiles, comprising: an exhaust pipe with an internal mounting ring, wherein at least one side of the mounting ring is provided with a nano-hydrophobic film; a sealing structure, sleeved on the exhaust pipe, for sealing the annular space between the exhaust pipe and the inner wall of the aluminum alloy tubular profile; and a conductive structure, disposed on the exhaust pipe, serving as a connecting conductor between the aluminum alloy tubular profile and the bracket. This utility model, by providing a nano-hydrophobic film inside the exhaust pipe, allows gas to pass through the nano-hydrophobic film and exit the aluminum alloy tubular profile when the gas pressure inside the exhaust pipe increases, preventing excessively high gas pressure inside the aluminum alloy tubular profile; simultaneously, external anodizing liquid cannot pass through the nano-hydrophobic film to enter the aluminum alloy tubular profile, preventing internal oxidation of the aluminum alloy tubular profile.

Description

Technical Field

[0001] This utility model relates to the field of anodizing technology, and specifically discloses an auxiliary shielding plug for anodizing aluminum alloy tubular profiles. Background Technology

[0002] It is not uncommon for aluminum alloy tubular profiles to require only outer wall oxidation during processing, while the inner wall remains unoxidized. For example, in hydraulic system fittings, this is to prevent the inner oxide film from peeling off and contaminating the hydraulic oil; in assemblies, an excessively thick oxide film can affect the precision of interference fits; and in decorative tubing, such as aluminum tubing used in furniture where the interior is not visible, oxidation of the inner wall is unnecessary. Traditionally, during anodizing, tape or ordinary rubber plugs are used to seal both ends of the tubing to prevent oxide liquid from entering the interior, thus achieving the goal of oxidizing only the outer wall. However, during the oxidation process, high temperatures can increase the internal pressure of the tubing. Excessive pressure can easily break through the tape, causing seal failure and allowing oxide liquid to enter the interior, resulting in internal oxidation as well. Therefore, this application provides an auxiliary shielding plug for the anodizing of aluminum alloy tubular profiles. Utility Model Content

[0003] The purpose of this invention is to solve the above problems and provide an auxiliary shielding plug for anodizing aluminum alloy tubular profiles.

[0004] The objective of this utility model is achieved through the following technical solution: an auxiliary shielding plug for anodizing aluminum alloy tubular profiles, comprising:

[0005] An exhaust pipe, wherein an installation ring is provided inside the installation ring, and a nano-hydrophobic film is provided on at least one side of the installation ring;

[0006] A sealing structure is fitted onto the exhaust pipe to seal the annular space between the exhaust pipe and the inner wall of the aluminum alloy tubular profile.

[0007] A conductive structure is provided on the exhaust pipe and serves as a connecting conductor between the aluminum alloy tubular profile and the bracket.

[0008] Both sides of the mounting ring are provided with a nano-hydrophobic membrane.

[0009] The inner wall of the exhaust pipe is provided with a shoulder in the circumferential direction, and the mounting ring is pressed onto the shoulder by a pressure ring.

[0010] The exhaust pipe is inserted into the aluminum alloy tubular profile at one end and is provided with a fixing plate. The sealing structure is located between the fixing plate and the conductive structure.

[0011] The sealing structure includes two end plates spaced apart, an outer sealing ring connecting the two end plates, and an inner sealing ring connecting the two end plates and located inside the outer sealing ring; the exhaust pipe passes through the two end plates, and one of the end plates is fixed to the fixing plate.

[0012] The conductive structure includes a plug sleeved on the exhaust pipe, a pressure block disposed on the side of the plug away from the sealing structure, and an electrode connected to the pressure block.

[0013] A bushing is embedded in the inner hole of the block, and the exhaust pipe is threadedly connected to the bushing.

[0014] The block has several spring pieces evenly arranged around its circumference.

[0015] Compared with the prior art, this application has the following beneficial effects:

[0016] (1) By setting a nano-hydrophobic membrane in the exhaust pipe, when the gas pressure in the exhaust pipe increases, the gas can pass through the nano-hydrophobic membrane to be discharged from the aluminum alloy tubular profile, preventing the gas pressure inside the aluminum alloy tubular profile from being too high; at the same time, the external oxide liquid cannot pass through the nano-hydrophobic membrane to enter the aluminum alloy tubular profile, preventing the inside of the aluminum alloy tubular profile from being oxidized.

[0017] (2) This utility model can connect the electrodes to the anodizing bracket, thereby making the two ends of the aluminum alloy tubular profile connected to the anodizing bracket circuit, compensating for current attenuation, and making the anodizing effect of the pipe better.

[0018] Some of the additional features of this application will be described in the following description. These additional features will become apparent to those skilled in the art upon examination of the following description and the accompanying drawings, or upon understanding the production or operation of the embodiments. The features disclosed in this application can be implemented and achieved through the practice or use of various methods, means, and combinations thereof with respect to the specific embodiments described below. Attached Figure Description

[0019] The accompanying drawings, which are provided to further illustrate this application and constitute a part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute a limitation thereof. In the drawings, the same reference numerals denote the same components.

[0020] Figure 1 Structural diagram of this utility model.

[0021] Figure 2 This is a cross-sectional view of the present invention.

[0022] Figure 3 This is a cross-sectional view of the sealing structure of this utility model.

[0023] Figure 4 for Figure 2 Enlarged diagram of point A in the middle.

[0024] Figure 5 This is a schematic diagram of the present invention installed on an aluminum alloy tubular profile.

[0025] The reference numerals in the above figures are as follows: 1-pressure block, 2-blocking block, 3-sealing structure, 31-end plate, 32-outer sealing ring, 33-inner sealing ring, 4-fixing plate, 5-spring sheet, 6-exhaust pipe, 7-electrode, 8-shoulder, 9-mounting ring, 10-nano hydrophobic film, 11-pressure ring, 12-aluminum alloy tubular profile, 13-bushing. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0027] It should be noted that if the terms "first," "second," etc., are used in the specification, claims, and accompanying drawings of this application, they are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0028] In this application, when terms such as "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" are used, they indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for 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] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0030] Furthermore, in this application, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] Example

[0033] like Figure 1 , 2 As shown, this embodiment discloses an auxiliary shielding plug for anodizing aluminum alloy tubular profiles, which includes: an exhaust pipe 6, a sealing structure 3, and a conductive structure.

[0034] The exhaust pipe 6 has an internal mounting ring 9, with a nano-hydrophobic membrane 10 on at least one side. In this embodiment, both sides of the mounting ring 9 have nano-hydrophobic membranes 10, and the edges of the nano-hydrophobic membranes 10 can be glued to the mounting ring 9. The nano-hydrophobic membrane 10 can be made of PTFE, allowing gas to pass through while preventing liquids from passing through. Specifically, a support mesh can be provided on the central hole of the mounting ring 9 to improve the support strength of the nano-hydrophobic membrane 10 without obstructing gas flow. Additionally, as... Figure 4 As shown, a shoulder 8 is circumferentially provided on the inner wall of the exhaust pipe 6, and the mounting ring 9 is pressed onto the shoulder 8 by a pressure ring 11. During installation, the mounting ring 9 with the fixed nano-hydrophobic film 10 is installed on the shoulder 8, and then the mounting ring 9 is pressed onto the shoulder 8 by the pressure ring 11. Specifically, the pressure ring 11 and the inner wall of the exhaust pipe 6 can be connected by threads. In this embodiment, the exhaust pipe 6, the mounting ring 9, and the pressure ring 11 can all be made of polytetrafluoroethylene (PTFE), so they can withstand the oxidizing liquid for a long time and will not undergo an oxidation reaction during the anodizing process, thus not affecting the function.

[0035] The sealing structure 3 is fitted onto the exhaust pipe 6, and it is used to seal the annular space between the exhaust pipe 6 and the inner wall of the aluminum alloy tubular profile 12. Specifically, as shown... Figure 3 As shown, the sealing structure 3 includes two annular end plates 31 spaced apart, an outer sealing ring 32 connecting the two end plates 31, and an inner sealing ring 33 connecting the two end plates 31 and located inside the outer sealing ring 32; the exhaust pipe 6 passes through the two end plates 31, the outer sealing ring 32, and the inner sealing ring 33. When installed, the outer sealing ring 32 can be bent outwards, while the inner sealing ring 33 bends inwards. Before the sealing structure 3 is compressed and expanded, the exhaust pipe 6 and the sealing structure 3 are movable, meaning the exhaust pipe 6 can rotate relative to the sealing structure. When the sealing structure 3 is subjected to axial compressive force, the entire sealing structure 3 can expand radially, causing the outer sealing ring 32 to adhere tightly to the inner wall of the aluminum alloy tubular profile 12, while the inner sealing ring 33 adheres tightly to the outer wall of the exhaust pipe 6, thus sealing the annular space between the exhaust pipe 6 and the inner wall of the aluminum alloy tubular profile 12. Figure 5 As shown. When installing, the sealing structure 3 can be made of fluororubber, which has good corrosion resistance.

[0036] In addition, a fixing plate 4 is provided at one end of the exhaust pipe 6 that is inserted into the aluminum alloy tubular profile 12. The sealing structure 3 is located between the fixing plate 4 and the conductive structure. The fixing plate 4 can be made of polytetrafluoroethylene, which serves to block and support the sealing structure 3.

[0037] A conductive structure is provided on the exhaust pipe 6, which serves as a connecting conductor between the aluminum alloy tubular profile 12 and the bracket. For example... Figure 2 As shown, the conductive structure includes a plug 2 sleeved on the exhaust pipe 6, a pressure block 1 disposed on the side of the plug 2 opposite to the sealing structure 3, and an electrode 7 connected to the pressure block 1. The plug 2 and the pressure block 1 are integrally formed, and the diameter of the pressure block 1 is larger than the diameter of the plug 2C and the aluminum alloy tubular profile 12.

[0038] In addition, several spring pieces 5 are evenly arranged circumferentially on the plug block 2. The spring pieces 5 are arc-shaped, with one end near the sealing structure 3 fixed to the plug block 2 by welding, and the other end being a free end. The diameter of the circle formed by all the spring pieces 5 is larger than the diameter of the aluminum alloy tubular profile 12. Therefore, when the entire shielding plug is inserted into the aluminum alloy tubular profile 12, the spring pieces 5 are compressed and deformed, allowing the shielding plug to be inserted into the aluminum alloy tubular profile 12. Furthermore, due to the elasticity of the spring pieces 5, the shielding plug can be clamped tightly against the inner wall of the aluminum alloy tubular profile 12. Figure 5 As shown. The blocking block 2, the pressure block 1, and the spring piece 5 can all be made of titanium alloy.

[0039] A bushing 13 is embedded in the inner hole of the plug 2. The bushing 13 and the inner hole of the plug 2 are tightly fitted. The exhaust pipe 6 is threadedly connected to the bushing 13. The bushing 13 is also made of polytetrafluoroethylene. Since it does not produce an oxidation reaction, it will not affect the threaded fit between the exhaust pipe 6 and the bushing 13.

[0040] When anodizing the aluminum alloy tubular profile 12, two shielding plugs of this embodiment are used to seal both ends of the aluminum alloy tubular profile 12. Specifically, the shielding plug is inserted into the end of the aluminum alloy tubular profile 12 with the sealing structure 3 facing inward, the pressure block 1 is tightly attached to the end of the aluminum alloy tubular profile 12, and the spring piece 5 is clamped to the inner wall of the aluminum alloy tubular profile 12. The electrode 7 is located on the outside of the aluminum alloy tubular profile 12. Rotating the exhaust pipe 6 causes the exhaust pipe 6 to move outward. During the outward movement of the exhaust pipe 6, the sealing structure 3 is moved outward. The plug 2 squeezes the sealing structure 3, causing the sealing structure 3 to expand and seal the annular space between the exhaust pipe 6 and the inner wall of the aluminum alloy tubular profile 12. The middle part of the aluminum alloy tubular profile 12 is hung on the hook of the anodizing rack, and the electrode 7 is fixed to the anodizing rack with screws. The aluminum alloy tubular profile 12 can then be placed in the anodizing tank for oxidation. Because both ends of the aluminum alloy tubular profile 12 are sealed, the oxidizing liquid will not enter the aluminum alloy tubular profile 12, thus preventing the interior of the aluminum alloy tubular profile 12 from being oxidized. When the gas pressure inside the aluminum alloy tubular profile 12 increases during the oxidation process, the gas can be discharged from the exhaust pipe 6 to reduce the gas pressure inside the aluminum alloy tubular profile 12, preventing the shielding plug from being blown open by the gas pressure, and also preventing the pipe from bursting due to excessive gas pressure, especially for thin-walled pipes.

[0041] It should be noted that all features disclosed in this specification, or all steps in all methods or processes disclosed, may be combined in any way, except for mutually exclusive features and / or steps.

[0042] Furthermore, the specific embodiments described above are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this utility model, and these solutions all fall within the scope of this utility model and its protection. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and not intended to limit the scope of the claims. The scope of protection of this utility model is defined by the claims and their equivalents.

Claims

1. A supplementary masking plug for the anodizing of aluminum alloy tubular sections, characterized in that, include: An exhaust pipe (6) is provided inside which an installation ring (9) is provided, and at least one side of the installation ring (9) is provided with a nano-hydrophobic film (10); A sealing structure (3) is fitted onto the exhaust pipe (6) to seal the annular space between the exhaust pipe (6) and the inner wall of the aluminum alloy tubular profile (12); A conductive structure is provided on the exhaust pipe (6) and serves as a connecting conductor between the aluminum alloy tubular profile (12) and the bracket.

2. The auxiliary masking plug for anodic oxidation of aluminum alloy tubular profiles according to claim 1, characterized in that, The mounting ring (9) has a nano-hydrophobic membrane (10) on both sides.

3. Auxiliary masking plug for the anodic oxidation of aluminium alloy tubular sections according to claim 1 or 2, characterised in that, The exhaust pipe (6) has a shoulder (8) circumferentially arranged on its inner wall, and the mounting ring (9) is pressed onto the shoulder (8) by a pressure ring (11).

4. The auxiliary masking plug for anodic oxidation of aluminum alloy tubular profiles according to claim 1, characterized in that, The exhaust pipe (6) is inserted into the aluminum alloy tubular profile (12) at one end and is provided with a fixing plate (4). The sealing structure (3) is provided between the fixing plate (4) and the conductive structure.

5. The auxiliary masking plug for anodic oxidation of aluminum alloy tubular profiles according to claim 4, characterized in that, The sealing structure (3) includes two end plates (31) spaced apart, an outer sealing ring (32) connecting the two end plates (31), and an inner sealing ring (33) connecting the two end plates (31) and located inside the outer sealing ring (32); the exhaust pipe (6) passes through the two end plates (31).

6. The auxiliary masking plug for anodic oxidation of aluminum alloy tubular profiles according to claim 1, characterized in that, The conductive structure includes a plug (2) sleeved on the exhaust pipe (6), a pressure block (1) disposed on the side of the plug (2) away from the sealing structure (3), and an electrode (7) connected to the pressure block (1).

7. Auxiliary masking plug for the anodization of aluminum alloy tubular sections according to claim 6, characterized in that, A bushing (13) is embedded in the inner hole of the block (2), and the exhaust pipe (6) is threadedly connected to the bushing (13).

8. The auxiliary masking plug for anodic oxidation of aluminum alloy tubular profiles according to claim 6, characterized in that, The block (2) is circumferentially evenly provided with several spring pieces (5).

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