Aluminum sheet surface phosphoric acid anodizing treatment device for adhesive film single lap joint tension shear test

Abstract

The utility model provides an aluminum sheet surface phosphoric acid anodizing treatment device for a single-lap tensile shear test of an adhesive film, which comprises a reaction tank filled with phosphoric acid electrolyte; the aluminum sheet is arranged at one end in the reaction tank in a hanging manner and is connected with the positive electrode of the power supply; the lead plate is arranged at the other end in the reaction tank in a hanging manner and is connected with the negative electrode of the power supply; the heater is arranged in the reaction tank and is used for heating the phosphoric acid electrolyte; the areas of the lead plate and the aluminum sheet immersed in the phosphoric acid electrolyte are set as S1 and S2 respectively; the range of S1 to S2 is 1: 1-1: 10. By designing the special aluminum sheet surface phosphoric acid anodizing treatment device, instant and small-batch phosphoric acid anodizing treatment on aluminum sheets in a laboratory environment is realized, and the problem that the existing industrial batch production mode is difficult to meet small-scale and high-frequency flexible requirements is solved; and the rapid verification requirement on a small amount and multiple batches of samples in the adhesive film research and development stage is met.

Description

Technical Field

[0001] This utility model relates to the technical field of surface phosphoric acid anodizing equipment, specifically a phosphoric acid anodizing device for aluminum sheet surface used in single-overlap tensile shear testing of adhesive film. Background Technology

[0002] In the field of adhesive film research and performance testing, tensile shear strength is one of the key indicators for evaluating the adhesion performance between the adhesive film and the metal substrate. Currently, the industry commonly uses single-lapped aluminum metal samples with phosphate anodizing treatment for testing. This treatment process can significantly enhance the adhesion between the adhesive film and the aluminum sheet, ensuring the reliability of the test results.

[0003] However, existing technologies have the following limitations: 1. To ensure test accuracy, aluminum sheets treated with phosphoric acid anodizing must be used within 48 hours; otherwise, surface activity may decrease due to natural oxidation or contamination, leading to deviations in bonding performance data. 2. To reduce costs and improve efficiency, companies typically use mass production methods to process aluminum sheets. However, laboratory R&D often requires small batches of samples to meet the rapid verification needs of different formulations or processes. Existing production models are difficult to match such small-scale, high-frequency, and flexible requirements. 3. Due to the manufacturer's minimum order quantity and production cycle, laboratories cannot obtain freshly treated aluminum sheets in a timely manner, leading to delays in R&D progress or the use of expired samples, affecting data reliability.

[0004] Therefore, there is an urgent need to develop a low-cost, fast-response aluminum sheet surface treatment method or alternative to resolve the contradiction between small-batch, high-timeliness requirements and industrial mass production, and to improve the efficiency and accuracy of film research and development testing. Utility Model Content

[0005] To address the technical problems in the background art, this utility model discloses a phosphoric acid anodizing treatment device for aluminum sheet surface used in single-overlap tensile shear test of adhesive film.

[0006] This utility model provides a device for phosphoric acid anodizing treatment of aluminum sheet surface for single-overlap tensile shear test of adhesive film, comprising:

[0007] The reaction tank contains a phosphoric acid electrolyte.

[0008] An aluminum sheet is suspended at one end of the reaction tank and connected to the positive terminal of the power supply.

[0009] A lead plate is suspended at the other end of the reaction tank and connected to the negative terminal of the power supply.

[0010] A heater, installed inside the reaction tank, heats the phosphoric acid electrolyte;

[0011] The areas of the lead plate and aluminum sheet immersed in the phosphoric acid electrolyte are designated as S1 and S2, respectively.

[0012] The range of S1:S2 is 1:1 to 1:10.

[0013] Furthermore, the reaction tank is made of PP material.

[0014] Furthermore, a first support rod and a second support rod are respectively mounted at both ends of the top of the reaction tank; an aluminum sheet is suspended below the first support rod via a first hook; a lead plate is suspended below the second support rod via a second hook; the first support rod is connected to the positive terminal of the power supply, and the second support rod is connected to the negative terminal of the power supply.

[0015] Furthermore, both the first hook and the second hook are S-shaped, with their upper ends suspended from the first support rod or the second support rod, respectively. The aluminum sheet is suspended from the lower end of the first hook, and the lead plate is suspended from the lower end of the second hook.

[0016] Furthermore, the power supply is a DC regulated power supply.

[0017] Furthermore, the first support rod, the second support rod, and the hook are all made of copper.

[0018] Furthermore, the first hook is provided with two symmetrically arranged hook portions, replacing the S-shaped structure of the first hook.

[0019] The beneficial effects of this utility model are as follows: 1. By designing a dedicated aluminum sheet surface phosphoric acid anodizing treatment device, this utility model enables immediate, small-batch phosphoric acid anodizing treatment of aluminum sheets in a laboratory environment. This solves the problem that existing industrial mass production models are difficult to match with the small-scale, high-frequency, and flexible needs, and meets the rapid verification needs of small-batch, multi-sample testing during the film development stage. 2. Immediately obtaining freshly treated aluminum sheets avoids deviations in adhesive performance data caused by decreased aluminum sheet surface activity, thereby improving the efficiency and accuracy of single-overlap tensile shear tests of the film. 3. Processing aluminum sheets in-house reduces reliance on external suppliers, lowers additional costs caused by minimum order quantities and production cycle limitations imposed by manufacturers, and improves resource utilization efficiency, contributing to a reduction in overall R&D costs. 4. The device adopts a suspended design, with aluminum sheets and lead plates suspended in the reaction tank via hooks, facilitating installation and disassembly. Simultaneously, by adjusting the heater to control the temperature of the phosphoric acid electrolyte and setting the immersion ratio of the lead plate and aluminum sheet in the electrolyte, the anodizing process can be precisely controlled, ensuring the consistency and repeatability of the treatment effect. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a structural schematic diagram from another perspective of this utility model;

[0023] Figure 3 This is the main view of the first hook;

[0024] In the diagram: 1. Reaction tank; 2. Aluminum sheet; 3. Lead plate; 4. First support rod; 5. Second support rod; 6. First hook; 7. Heater; 8. Second hook; 81. Hook; 82. Main body. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0026] like Figure 1 and Figure 2 As shown, this utility model discloses a phosphoric acid anodizing treatment device for aluminum sheet surface used in single-overlap tensile shear testing of adhesive film, including a reaction tank 1 with an open top, inside which a phosphoric acid electrolyte is placed. The reaction tank 1 is made of PP material to prevent acid and alkali corrosion.

[0027] A first support rod 4 and a second support rod 5 are horizontally arranged at the upper end of the reaction tank 1, and are fixed to both ends of the reaction tank 1 by hot melt adhesive. Multiple downward-hanging aluminum sheets 2 are mounted on the first support rod 4 via first hooks 6. Figure 3 As shown, the first hook 6 includes a U-shaped, downward-opening main body 82 that is suspended from the first support rod 4. Each open end of the main body 82 extends into an arc-shaped, upward-opening hook 81, on which the aluminum sheet 2 is suspended. According to GB / T 7124, each aluminum sheet 2 sample is rectangular, with dimensions of 100mm × 25mm. A hole is drilled at one end of the aluminum sheet 2, 15mm from the edge. The hole diameter is preferably 5-8mm to facilitate the suspension of the aluminum sheet 2 by the first hook 6. In this embodiment, the hole diameter on the aluminum sheet 2 is 6mm.

[0028] The second support rod 5 is provided with two symmetrical, downward-hanging lead plates 3 via the second hook 8. The second hook 8 is S-shaped, with its upper end suspended on the second support rod 5 and the lead plates 3 suspended at the lower end of the second hook 8.

[0029] A heater 7 is also installed in the reaction tank 1 to maintain the temperature of the electrolyte at 25±5℃. In this embodiment, a PTFE heating tube is used, which can effectively control the temperature range of the reaction solution.

[0030] The first support rod 4, the second support rod 5, the first hook 6, and the second hook 8 are all made of copper to improve electrical conductivity.

[0031] The areas of lead plate 3 and aluminum sheet 2 immersed in phosphoric acid electrolyte are set as S1 and S2, respectively; according to the standard HB / Z197-91, the range of S1:S2 is set as 1:1-1:10.

[0032] The first support rod 4 is connected to the positive terminal of the power supply, and the second support rod 5 is connected to the negative terminal. When energized, the surface of the aluminum sheet 2 undergoes phosphoric acid anodizing treatment. The power supply is a DC regulated power supply in constant voltage mode to ensure a constant input voltage for the reaction.

[0033] The working principle of this utility model is as follows:

[0034] 1. In a phosphoric acid electrolyte, aluminum acts as the anode and undergoes an oxidation reaction under the influence of direct current. In the anodic reaction, aluminum atoms lose electrons to form Al. 3 +, and reacts with oxygen ions (O) in the electrolyte. 2 -) combine to form aluminum oxide (Al2O3);

[0035] 2. In the initial stage of the reaction, a dense barrier layer rapidly forms on the aluminum surface, exhibiting high resistance and insulation. As electrolysis proceeds, the acidity of phosphoric acid causes localized dissolution of the film, forming pores. The electrolyte continues to react with the aluminum substrate through these pores, extending the oxide film deeper. At this point, the rate of alumina formation and the rate of chemical dissolution of the film by phosphoric acid reach a dynamic equilibrium, thus forming a porous structure.

[0036] 3. Phosphoric acid anodized film has excellent corrosion resistance, high hardness and good adhesive properties, making it suitable for adsorbing dyes or adhesives.

[0037] The advantages of this embodiment are: 1. This utility model, through the design of a dedicated phosphoric acid anodizing treatment device for the surface of aluminum sheet 2, realizes the immediate and small-batch phosphoric acid anodizing treatment of aluminum sheet 2 in a laboratory environment, solving the problem that the existing industrial mass production mode is difficult to match the small-scale, high-frequency, and flexible needs, and meeting the rapid verification needs of small-batch, multi-sample tests in the film R&D stage; 2. Immediately obtaining freshly treated aluminum sheet 2 avoids deviations in adhesive performance data caused by the decrease in the surface activity of aluminum sheet 2, thereby improving the efficiency and accuracy of the single-overlap tensile shear test of the film; 3. By processing aluminum sheet 2 in-house, dependence on external suppliers is reduced, and additional costs caused by minimum order quantities and production cycle restrictions of manufacturers are reduced, while improving resource utilization efficiency and contributing to the reduction of overall R&D costs; 4. The device adopts a suspended design, with aluminum sheet 2 and lead plate 3 suspended in the reaction tank 1 by hooks, facilitating installation and disassembly; at the same time, by adjusting the temperature of the phosphoric acid electrolyte by adjusting the heater 7 and setting the area ratio of lead plate 3 and aluminum sheet 2 immersed in the electrolyte, the anodizing process can be precisely controlled, ensuring the consistency and repeatability of the treatment effect.

[0038] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A device for phosphoric acid anodizing treatment of aluminum sheet surface for single-overlap tensile shear test of adhesive film, characterized in that, include: The reaction tank (1) contains phosphoric acid electrolyte; An aluminum sheet (2) is suspended at one end of the reaction tank (1) and connected to the positive terminal of the power supply. A lead plate (3) is suspended at the other end of the reaction tank (1) and connected to the negative terminal of the power supply. A heater (7) is installed in the reaction tank (1) to heat the phosphoric acid electrolyte; The areas of the lead plate (3) and aluminum sheet (2) immersed in the phosphoric acid electrolyte are set as S1 and S2, respectively; The range of S1:S2 is 1:1 to 1:

10.

2. The device for phosphoric acid anodizing treatment of aluminum sheet surface for single overlap tensile shear test of adhesive film according to claim 1, characterized in that: The reaction tank (1) is made of PP material.

3. The device for phosphoric acid anodizing treatment of aluminum sheet surface for single overlap tensile shear test of adhesive film according to claim 2, characterized in that: The top of the reaction tank (1) is supported by a first support rod (4) and a second support rod (5) at both ends; The aluminum sheet (2) is suspended below the first support rod (4) by the first hook (6); The lead plate (3) is suspended below the second support rod (5) by the second hook (8); The first support rod (4) is connected to the positive terminal of the power supply, and the second support rod (5) is connected to the negative terminal of the power supply.

4. The device for phosphoric acid anodizing treatment of aluminum sheet surface for single overlap tensile shear test of adhesive film according to claim 3, characterized in that: The first hook (6) and the second hook (8) are both S-shaped, with their upper ends suspended on the first support rod (4) or the second support rod (5) respectively. The aluminum sheet (2) is suspended at the lower end of the first hook (6), and the lead plate (3) is suspended at the lower end of the second hook (8).

5. The device for phosphoric acid anodizing treatment of aluminum sheet surface for single overlap tensile shear test of adhesive film according to claim 1, characterized in that: The power supply is a DC regulated power supply.

6. The apparatus for phosphoric acid anodizing treatment of aluminum sheet surface for single overlap tensile shear test of adhesive film according to claim 4, characterized in that: The first support rod (4), the second support rod (5), and the hook are all made of copper.

7. The apparatus for phosphoric acid anodizing treatment of aluminum sheet surface for single overlap tensile shear test of adhesive film according to claim 4, characterized in that: The first hook (6) is provided with two symmetrically arranged hook portions (81), replacing the S-shaped structure of the first hook (6).

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