Aluminum alloy sheet for mobile phone middle frame

Abstract

The utility model discloses an aluminum alloy plate used for a mobile phone middle frame, comprising a body, a thermally conductive coating and a thermally conductive resin layer; the body comprises an aluminum alloy base layer, two insulating layers and two anti-corrosion layers, the two insulating layers are respectively stacked on the two surfaces of the aluminum alloy base layer, and the two anti-corrosion layers are respectively stacked on the surfaces of the corresponding insulating layers; the thermally conductive coating is coated on the surface and the surrounding side of the body; the thermally conductive resin layer is coated on the surface and the surrounding side of the thermally conductive coating. By setting the anti-corrosion layer, the anti-corrosion layer provides excellent corrosion resistance to the body, protects the aluminum alloy base layer from corrosion, and then the thermally conductive coating and the thermally conductive resin layer are sequentially coated on the surface and the surrounding side of the body, so that the thermal conductivity of the plate is enhanced, and the heat dissipation of the plate is improved, and the heat dissipation is not affected by the insulating layer.

Description

Technical Field

[0001] The utility model relates to the field of metal plates, and in particular to an aluminum alloy plate used for a mobile phone middle frame. Background Art

[0002] With the continuous development of mobile communication technology, mobile phones have become an indispensable communication tool in people's daily lives. Mobile phones are divided into smartphones and basic phones. Smartphones generally have better performance than basic phones, but basic phones have more stable performance than smartphones. Most basic phones and smartphones use CPUs with the British ARM architecture. Smartphones have higher clock speeds, faster performance, more efficient processing of program tasks, and greater convenience in daily life. Smartphones have now entered thousands of households and have become an indispensable part of people's daily lives. The phone's midframe is a key component of the phone's frame.

[0003] Most existing mobile phone mid-frames are made of plastic or aluminum alloy. Aluminum alloy's good texture, mature manufacturing process, high yield, and low cost are among the most fundamental reasons for its widespread adoption. Furthermore, its weight is well controlled and it is suitable for a variety of processing. Aluminum alloy mid-frames effectively prevent atmospheric corrosion due to the dense oxide film formed on their surface. However, this oxide film is not resistant to acid and alkali corrosion. In complex external environments, mobile phone mid-frames are susceptible to acid and alkali corrosion, shortening their service life. Furthermore, aluminum alloy is conductive, and to prevent leakage, an insulating layer is usually placed on its surface. However, the presence of this insulating layer can significantly reduce or even eliminate the heat dissipation performance of the mobile phone mid-frame. Therefore, it is necessary to improve the existing aluminum alloy sheet materials used for mobile phone mid-frames. Utility Model Content

[0004] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide an aluminum alloy plate for mobile phone middle frames, which can effectively solve the problems of the existing aluminum alloy plates used in mobile phone middle frames being not resistant to acid and alkali corrosion and having poor heat dissipation performance.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An aluminum alloy plate used for a mobile phone middle frame comprises a body, a thermally conductive coating layer, and a thermally conductive resin layer; the body comprises an aluminum alloy base layer, two insulating layers, and two anti-corrosion layers, the two insulating layers being stacked on the two surfaces of the aluminum alloy base layer, and the two anti-corrosion layers being stacked on the surfaces of the corresponding insulating layers; the thermally conductive coating layer being coated on the surface and surrounding side surfaces of the body; and the thermally conductive resin layer being coated on the surface and surrounding side surfaces of the thermally conductive coating layer.

[0007] As a preferred solution, both insulation layers are made of LLDPE. LLDPE has excellent resistance to environmental stress cracking and electrical insulation, high heat resistance, impact resistance and puncture resistance. Even in a high temperature environment, the insulation layer is not easy to age.

[0008] As a preferred solution, the two anti-corrosion layers are both made of PVDF. PVDF has very excellent corrosion resistance, can protect the aluminum alloy base layer and the insulating layer from corrosion, and effectively extend the service life of the plate.

[0009] As a preferred solution, the thermal conductive coating is a graphene coating, which has excellent thermal conductivity and effectively improves the heat dissipation of the plate.

[0010] As a preferred solution, the thermally conductive resin layer is made of a thermally conductive plastic material, which is PPA. The thermally conductive resin layer is coated on the surface and surrounding side of the thermally conductive coating to ensure excellent heat dissipation performance while preventing the thermally conductive coating from being worn. The thermally conductive plastic uses thermally conductive fillers to evenly fill the polymer matrix material to improve its thermal conductivity. PPA with high hardness, high strength, good wear resistance and good chemical resistance is selected as the polymer matrix material, which can make the thermally conductive resin layer more durable and not easy to be worn, thereby providing better protection for the thermally conductive coating.

[0011] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0012] By setting up an anti-corrosion layer, the anti-corrosion layer provides excellent corrosion resistance to the main body, protecting the aluminum alloy base from corrosion, and then coating the surface and surrounding side of the main body with a thermal conductive coating and a thermal conductive resin layer in sequence, the thermal conductivity of the plate is enhanced, and the heat dissipation of the plate is improved, and the heat dissipation is not affected by the insulating layer.

[0013] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of a preferred embodiment of the present utility model.

[0015] Description of the accompanying drawings:

[0016] 10. Main body 11. Aluminum alloy base

[0017] 12. Insulation layer 13. Anti-corrosion layer

[0018] 20. Thermal conductive coating layer 30. Thermal conductive resin layer. DETAILED DESCRIPTION

[0019] Please refer to Figure 1 As shown, it shows the specific structure of a preferred embodiment of the present invention, including a body 10, a thermal conductive coating layer 20 and a thermal conductive resin layer 30.

[0020] The main body 10 includes an aluminum alloy base 11, two insulating layers 12 and two anti-corrosion layers 13. The two insulating layers 12 are respectively stacked on the two surfaces of the aluminum alloy base 11, and the two anti-corrosion layers 13 are respectively stacked on the surfaces of the corresponding insulating layers 12. In this embodiment, the two insulating layers 12 are both made of LLDPE. LLDPE has excellent resistance to environmental stress cracking and electrical insulation, high heat resistance, impact resistance and puncture resistance. Even in a high temperature environment, the insulating layer 12 is not easy to age. The two anti-corrosion layers 13 are both made of PVDF. PVDF has very excellent corrosion resistance, which can protect the aluminum alloy base 11 and the insulating layer 12 from corrosion, effectively extending the service life of the plate.

[0021] The thermal conductive coating 20 is coated on the surface and the peripheral side of the body 10; in this embodiment, the thermal conductive coating 20 is a graphene coating, which has excellent thermal conductivity and effectively improves the heat dissipation of the plate.

[0022] The thermally conductive resin layer 30 is coated on the surface and surrounding side surfaces of the thermally conductive coating layer 20. In the present embodiment, the thermally conductive resin layer 30 is made of a thermally conductive plastic material, which is PPA. The thermally conductive resin layer 30 is coated on the surface and surrounding side surfaces of the thermally conductive coating layer 20 to ensure excellent heat dissipation performance while preventing the thermally conductive coating layer 20 from being worn. The thermally conductive plastic is a polymer matrix material that is uniformly filled with a thermally conductive filler to improve its thermal conductivity. PPA, which has high hardness, high strength, good wear resistance, and good chemical resistance, is selected as the polymer matrix material, which can make the thermally conductive resin layer 30 more durable and less prone to wear, thereby providing better protection for the thermally conductive coating layer 20.

[0023] The production process of this embodiment is described in detail as follows:

[0024] First, an insulating layer 12 is coated on both surfaces of the aluminum alloy base layer 11, and then an anti-corrosion layer 13 is coated on the surface of the corresponding insulating layer 12 to form a main body 10. Next, a thermal conductive coating 20 is sprayed on the surface and surrounding side of the main body 10 by spraying, and then a thermal conductive resin layer 30 is coated on the surface and surrounding side of the thermal conductive coating 20.

[0025] The design focus of the present utility model is: by setting an anti-corrosion layer, the anti-corrosion layer provides excellent corrosion resistance to the main body, protecting the aluminum alloy base from corrosion, and then coating the surface and peripheral side of the main body with a thermal conductive coating and a thermal conductive resin layer in sequence, so that the thermal conductivity of the plate is enhanced, and the heat dissipation of the plate is improved, and the heat dissipation is not affected by the insulating layer.

[0026] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An aluminum alloy sheet used for a mobile phone middle frame, characterized in that: It includes a main body, a thermally conductive coating and a thermally conductive resin layer; the main body includes an aluminum alloy base layer, two insulating layers and two anti-corrosion layers, the two insulating layers are respectively stacked on the two surfaces of the aluminum alloy base layer, and the two anti-corrosion layers are respectively stacked on the surfaces of the corresponding insulating layers; the thermally conductive coating is coated on the surface and the surrounding side of the main body; the thermally conductive resin layer is coated on the surface and the surrounding side of the thermally conductive coating.

2. The aluminum alloy sheet used for the mobile phone middle frame according to claim 1, characterized in that: The two insulating layers are both made of LLDPE material.

3. The aluminum alloy sheet used for the mobile phone middle frame according to claim 1, characterized in that: The two anti-corrosion layers are both made of PVDF material.

4. The aluminum alloy sheet used for the mobile phone middle frame according to claim 1, characterized in that: The thermal conductive coating is a graphene coating.

5. The aluminum alloy sheet used for the mobile phone middle frame according to claim 1, characterized in that: The thermally conductive resin layer is made of thermally conductive plastic material, and the thermally conductive plastic is PPA.

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