Composite material processing method, composite material and electronic equipment

Abstract

The invention discloses a composite material processing method, a composite material and electronic equipment, and relates to the technical field of electronic manufacturing, the composite material processing method comprises the following steps: providing two metal foils; a welding combination surface is formed between the two metal foils in a welding mode; and compounding at least one high polymer material layer on at least one outer surface of the metal foil to obtain the composite material. The technical problem that in the prior art, the processing quality of a metal polymer composite material is poor is solved.

Description

Technical Field

[0001] The present application relates to the technical field of material processing technology, and in particular to a composite material processing method, a composite material, and an electronic device. Background Art

[0002] With the rapid development of electronic technology, electronic devices have integrated various electronic components such as sound, light, and electricity to achieve diversified functions, and the performance requirements for electronic devices are getting higher and higher. For example, foldable mobile phones, AR (Augmented Reality) or VR (Virtual Reality) and other foldable connecting parts also put forward the requirement for the functional device shell to be bendable. Metal polymer composite materials can effectively improve the mechanical properties of metals and achieve flexible bending.

[0003] When welding metal polymer composite materials, if the welding temperature is too low, the metal layers cannot be welded tightly together, and if the welding temperature is too high, the polymer material will melt under the high temperature of welding, causing damage to the composite material. Summary of the invention

[0004] The main purpose of the present application is to provide a composite material processing method, a composite material, and an electronic device, aiming to solve the technical problem of poor processing quality of metal polymer composite materials in the prior art.

[0005] To achieve the above object, the present application provides a composite material processing method, which comprises the following steps:

[0006] Two sheets of metal foil are provided;

[0007] A welding joint surface is formed between two metal foils by welding;

[0008] At least one layer of polymer material is compounded on at least one outer surface of the metal foil to obtain a composite material.

[0009] Optionally, the step of compounding at least one polymer material layer on at least one outer surface of the metal foil to obtain a composite material comprises:

[0010] At least one polymer material layer and at least one metal layer are compounded on at least one outer surface of the metal foil to obtain a composite material.

[0011] Optionally, the polymer material layers and the metal layers are alternately stacked.

[0012] Optionally, the metal foil comprises copper foil.

[0013] Optionally, the steps of forming a welding interface between two metal foils by welding include:

[0014] Two metal foils are stacked and placed, and a diffusion welding press is used to heat and pressurize along a preset welding area to weld the two metal foils together, forming a welding joint surface between the two metal foils.

[0015] Optionally, the step of compounding at least one polymer material layer on at least one outer surface of the metal foil to obtain a composite material comprises:

[0016] At least one layer of polymer material is compounded on at least one outer surface of the metal foil by gluing to obtain a composite material.

[0017] Optionally, the metal foil has a thickness of 0.1-200 μm.

[0018] Optionally, the thickness of the polymer material layer is 0.1-200 μm.

[0019] The present application also provides a composite material having a welding joint surface, at least a portion of the composite material is a welding joint surface, and the composite material is processed by the composite material processing method as described above.

[0020] The present application also provides an electronic device, which includes the composite material with a welding joint surface as described above.

[0021] The present application provides a composite material processing method, composite material, and electronic device. By providing two metal foils, a welding interface is formed between the two metal foils by welding, and the welding of the metal foils is realized. Since only the metal foils need to be welded, even if a higher welding temperature is used, the polymer material layer will not be affected. Therefore, the welding temperature can be determined only according to the welding quality of the metal foil, thereby fully ensuring the welding tightness of the metal foil. Then, at least one polymer material layer is compounded on at least one outer surface of the metal foil to obtain a composite material, and the polymer material layer and the metal foil are compounded after welding. In this way, the welding of the metal polymer material composite material is realized by first welding the metal foil to form a welding interface and then compounding the polymer material. Compared with directly welding the metal polymer material composite material together, the method of first welding the metal foil and then compounding the polymer material layer can not only meet the requirements of the metal foil welding tightness, but also effectively avoid the situation where the polymer material layer is damaged by heat melting during the welding process. The invention overcomes the technical defects that when welding metal-polymer composite materials, if the welding temperature is too low, the metal layers cannot be welded tightly together, and if the welding temperature is too high, the polymer material will melt under the high welding temperature, causing damage to the composite material, thereby improving the welding quality of metal-polymer composite materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0024] Figure 1 A schematic diagram of a process of an embodiment of a composite material processing method of the present application;

[0025] Figure 2 This is a schematic diagram of a scene of welding metal foil in an embodiment of the present application;

[0026] Figure 3 This is a schematic diagram of a scene of a composite polymer material layer and a metal layer in an embodiment of the present application;

[0027] Figure 4 Schematic diagram of the structure of the composite material in the embodiment of the present application.

[0028] Description of Figure Numbers:

[0029] Label name Label name 10 metal foil 11 Preset welding area 20 Polymer material layer 30 Metal layer 40 Welding parts 100 Diffusion welding head

[0030] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0032] With the rapid development of electronic technology, electronic devices have integrated a variety of electronic components such as sound, light, and electricity to achieve diversified functions, and the performance requirements for electronic devices are getting higher and higher. For example, foldable mobile phones, AR (Augmented Reality) or VR (Virtual Reality) and other foldable connecting parts have also put forward the need for the shells of functional components in electronic devices to be bendable. If these shells are made of pure metal materials, they cannot meet the requirements of more than 100,000 times of bending resistance due to the inherent stress fatigue limitations of metals, so they cannot be set on the bendable structure in electronic devices. Metal-polymer composite materials can effectively improve the mechanical properties of metals to achieve flexible bending.

[0033] When welding metal polymer composite materials, if the welding temperature is too low, the metal layers cannot be welded tightly together, and if the welding temperature is too high, the polymer material will melt under the high temperature of welding, causing damage to the composite material.

[0034] Based on this, the present embodiment provides a composite material processing method, by providing two metal foils, forming a welding interface between the two metal foils by welding, and realizing the welding of the metal foils. Since only the metal foils need to be welded, even if a higher welding temperature is used, it will not affect the polymer material layer. Therefore, the welding temperature can be determined only according to the welding quality of the metal foil, so as to fully ensure the welding tightness of the metal foil; and then, by compounding at least one polymer material layer on at least one outer surface of the metal foil, a composite material is obtained, and the polymer material layer and the metal foil are compounded after welding. In this way, the welding of the metal polymer composite material is realized by first welding the metal foil to form a welding interface and then compounding the polymer material. Compared with directly welding the metal polymer composite material together, the method of first welding the metal foil and then compounding the polymer material layer can not only meet the requirements of the metal foil welding tightness, but also effectively avoid the situation that the polymer material layer is damaged by heat melting during the welding process. The technical defect that the welding temperature cannot ensure the welding tightness of the composite material while avoiding the melting of the polymer material in the processing technology of the metal polymer composite material by welding is overcome, and the processing quality of the metal polymer composite material is improved.

[0035] The present application provides a composite material processing method. In one embodiment of the composite material processing method of the present application, referring to Figure 1 , the composite material processing method comprises the following steps:

[0036] Step S10, providing two metal foils;

[0037] In this embodiment, it should be noted that the composite material obtained by processing in this embodiment can be used to make housings of structural parts, components or functional devices in electronic equipment.

[0038] Metal foil refers to a thin metal sheet extended from a metal material, and can be at least one of copper foil, aluminum foil, aluminum alloy foil, and the like.

[0039] Exemplarily, the step S10 includes: obtaining two pre-prepared or commercially available metal foils.

[0040] Optionally, the metal foil comprises copper foil.

[0041] In this embodiment, the copper foil has good ductility, is easy to process and shape, and has low cost, and can better meet the flexibility requirements of the shell.

[0042] Optionally, the metal foil has a thickness of 0.1-200 μm.

[0043] In this embodiment, the thinner the overall thickness of the composite material, the better the flexibility of the processed shell and the lighter the overall weight, which can meet both the flexibility requirements of the shell and the lightweight requirements of the electronic equipment. However, the metal foil is too thin and has low strength, which may affect the welding quality. Therefore, the thickness of the metal foil is determined to be 0.1 to 200 μm, for example, 0.1 μm, 10 μm, 30 μm, 50 μm, 100 μm, 150 μm, 200 μm, etc.

[0044] Step S20, forming a welding interface between two metal foils by welding;

[0045] In this embodiment, it should be noted that welding refers to the manufacturing process and technology of joining metals or other thermoplastic materials such as plastics by heating, high temperature or high pressure. The welding of metal foil can achieve metallurgical bonding between metal foils, with high bonding strength, dense structure at the welding joint surface, mature technology, wide application range, and is a common processing equipment for various projects. Therefore, there is usually no need to add new processing equipment, which can effectively reduce the processing cost. Therefore, by welding the metal foil, on the one hand, the metal welding makes the joint surface tightly bonded; on the other hand, the welding method can fully guarantee the bonding strength of the connection. The specific method and process parameters of welding should be able to make the metal foil tightly welded, and can be selected and determined according to the actual situation.

[0046] Exemplarily, step S20 includes: placing two metal foils on a welding workbench, with at least partial regions of the two metal foils being fitted together, welding at least partially fitted regions of the two metal foils together to form a welding joint surface, and surrounding at least partially unwelded regions of the two metal foils to form a certain accommodation space, for example, the surrounding regions of the two metal foils can be welded together to form an accommodation space in the middle. The specific welding method, process conditions, etc. of the welding can be determined according to actual needs, and this embodiment does not limit this.

[0047] Optionally, the steps of forming a welding interface between two metal foils by welding include:

[0048] Two metal foils are stacked and placed, and a diffusion welding press is used to heat and pressurize along a preset welding area to weld the two metal foils together, forming a welding joint surface between the two metal foils.

[0049] In this embodiment, it should be noted that the preset welding area refers to the area on the metal foil that needs to be welded, which can be designed and determined in advance according to actual needs.

[0050] For example, two metal foils are stacked and placed on a welding workbench, and the two metal foils are positioned so that the preset welding areas on the two metal foils fit together, and a diffusion welding head is used to heat and pressurize along the preset welding areas, and the preset welding areas on the two metal foils are welded together to form a welding joint surface, and other areas except the preset welding areas are surrounded to form a receiving space. Among them, the specific welding method, process conditions, etc. of the welding can be determined according to actual needs, and this embodiment does not limit this.

[0051] In one practicable manner, multiple welding joints can be processed simultaneously, referring to Figure 2 , Figure 2 The metal foil in the embodiment is provided with 11 parallel preset welding areas 11 in the longitudinal direction and 1 preset welding area 11 in the transverse direction. After the two metal foils 10 are stacked, a diffusion welding press head 100 is used to heat and pressurize along the preset welding areas 11 to weld the preset welding areas 11 on the two metal foils 10 together, thereby obtaining 20 double-layer metal foils welded together, wherein there are 20 independent accommodating spaces. It is also possible to further cut along the preset welding areas 11 to obtain 20 independent double-layer metal foils, each of which has an accommodating space. In this case, before the step of cutting along the preset welding areas, step S30 may be performed to compound at least one layer of polymer material on the upper and lower surfaces of the double-layer metal foils welded together, and then cutting may be performed along the preset welding areas to obtain 20 composite materials each having an independent accommodating space. For example, referring to Figure 3 , the polymer material layer 20 and the metal layer 30 are glued together in advance to obtain a composite film, and the double-layer metal foils welded together are placed on a laminating machine, and a layer of the composite film is glued on the upper and lower surfaces of each double-layer metal foil by the laminating machine. When gluing the composite film, the polymer material layer 20 can be made to fit the metal foil 10, thereby forming a sandwich structure of the metal foil 10, the polymer material layer 20, and the metal layer 30, and obtaining a composite material composed of metal and polymer materials.

[0052] Step S30, compounding at least one polymer material layer on at least one outer surface of the metal foil to obtain a composite material.

[0053] In this embodiment, it should be noted that if pure metal materials are used, although the welding tightness requirements can be met, due to the inherent stress fatigue limitations of metals, the requirements of more than 100,000 times of bending resistance cannot be met, so it cannot be set on the bendable structure part of the electronic device. Metal-polymer composite materials can effectively improve the mechanical properties of metals to achieve flexible bending. Therefore, this embodiment combines metal materials with polymer materials, which will not affect the welding tightness of the composite material, and can also use the good flexibility of polymer materials to improve the mechanical properties of metal foil and improve the flexibility of the material, so that the obtained composite material can meet the product's requirements for bending resistance. The polymer material can include at least one of plastics, rubber, fibers, resins and other polymer materials.

[0054] Exemplarily, step S30 includes: at least one layer of polymer material can be compounded on at least one outer surface of the metal foil by gluing, injection molding, etc. to obtain a composite material composed of metal and polymer material, wherein the composite material includes at least two layers of metal foil and at least one layer of polymer material.

[0055] In one practicable manner, the metal foil may be first placed as an insert in an injection mold, and at least one polymer material layer may be compounded on the outer surface of the metal foil by injection molding.

[0056] Optionally, the thickness of the polymer material layer is 0.1-200 μm.

[0057] In this embodiment, the thinner the overall thickness of the composite material, the better the flexibility of the composite material and the lighter the overall weight, which can take into account both the flexibility and lightweight requirements of the electronic device. Therefore, the thickness of the polymer material layer is determined to be 0.1 to 200 μm, for example, 0.1 μm, 10 μm, 30 μm, 50 μm, 100 μm, 150 μm, 200 μm, etc.

[0058] Optionally, the step of compounding at least one polymer material layer on at least one outer surface of the metal foil to obtain a composite material comprises:

[0059] At least one polymer material layer and at least one metal layer are compounded on at least one outer surface of the metal foil to obtain a composite material.

[0060] Exemplarily, at least one layer of polymer material and at least one layer of metal can be compounded on at least one outer surface of the metal foil by gluing, injection molding, etc. to obtain a composite material composed of metal and polymer material, wherein the composite material includes at least two layers of metal foil, at least one layer of polymer material and at least one layer of metal layer, wherein the material of the metal layer can be the same as or different from the material of the metal foil, and this embodiment is not limited to this.

[0061] Optionally, the polymer material layers and the metal layers are alternately stacked.

[0062] In this embodiment, on the outer surface of each of the polymer material layers and metal layers that need to be composited, the polymer material layers and the metal layers are alternately stacked, which can effectively improve the mechanical properties of the composite material.

[0063] Optionally, the composite material includes at least one copper layer and at least one polymer material layer.

[0064] In this embodiment, the composite material is formed by stacking at least one copper layer and at least one polymer material layer, wherein the copper layer has good ductility and is easy to process and form; the material of the polymer material layer can be at least one of polymer materials such as plastic, rubber, fiber, etc. The polymer material has good flexibility and can better meet the flexibility requirements of the electronic device.

[0065] Optionally, the step of compounding at least one polymer material layer on at least one outer surface of the metal foil to obtain a composite material comprises:

[0066] At least one layer of polymer material is compounded on at least one outer surface of the metal foil by gluing to obtain a composite material.

[0067] In this embodiment, the gluing process is relatively simple, the production cost is low, and the polymer material layer is processed separately, so the thickness and mechanical properties of the polymer material layer can be better controlled.

[0068] Exemplarily, a double layer of metal foil welded together can be placed on a laminating machine, and the laminating machine can be used to glue at least one layer of polymer material to at least one outer surface of the metal foil to obtain a composite material composed of metal and polymer material, wherein the composite material includes at least two layers of metal foil and at least one layer of polymer material.

[0069] In one feasible manner, at least one layer of polymer material and at least one layer of metal can be first bonded by a laminating machine to obtain a composite film, and then the composite film can be bonded to at least one outer surface of a double layer of metal foil welded together by a laminating machine to obtain a composite material composed of metal and polymer material, wherein the composite material includes at least two layers of metal foil, at least one layer of polymer material and at least one layer of metal layer.

[0070] In one practicable manner, referring to Figure 4 The composite material includes two layers of metal foil 10 welded together, a polymer material layer 20 attached to the outer surface of the metal foil, and a metal layer 30 attached to the outer surface of the polymer material layer. The welded area in the middle of the metal foil 10 forms a receiving space 40.

[0071] In this embodiment, by providing two metal foils, a welding interface is formed between the two metal foils by welding, so that the metal foils are welded. Since only the metal foils need to be welded, even if a higher welding temperature is used, the polymer material layer will not be affected. Therefore, the welding temperature can be determined only according to the welding quality of the metal foil, so as to fully ensure the welding tightness of the metal foil. Then, by compounding at least one polymer material layer on at least one outer surface of the metal foil, a composite material is obtained, so that the polymer material layer and the metal foil are compounded after welding. The flexibility of the composite material is improved by using the polymer material, so that the bendability of the composite material can be improved. In this way, the processing of the metal polymer material composite material is realized by first welding the metal foil to form a welding interface and then compounding the polymer material. Compared with directly processing the metal polymer material composite material together, the method of first welding the metal foil and then compounding the polymer material layer can not only meet the requirements of the metal foil welding tightness, but also effectively avoid the situation that the polymer material layer is damaged by heat melting during the welding process. The invention overcomes the technical defects that when welding metal-polymer composite materials, if the welding temperature is too low, the metal layers cannot be welded tightly together, and if the welding temperature is too high, the polymer material will melt under the high welding temperature, causing damage to the composite material, thereby improving the welding quality of metal-polymer composite materials.

[0072] The method provided by the present application solves the technical problem of poor processing quality of metal polymer composite materials in the prior art. Compared with the prior art, the beneficial effects of the process flow provided by the embodiment of the present invention are the same as the beneficial effects of the composite material processing method of the above embodiment, which will not be repeated here.

[0073] The process provided by the present application solves the technical problem of poor processing quality of metal polymer composite materials in the prior art. Compared with the prior art, the beneficial effects of the embodiments of the present invention are the same as those of the above embodiments, which will not be described in detail here.

[0074] The device provided by the present application solves the technical problem of poor processing quality of metal polymer composite materials in the prior art. Compared with the prior art, the beneficial effects of the device provided by the embodiment of the present invention are the same as those of the above embodiment, which will not be described in detail here.

[0075] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent processing scope of the present application.

Claims

1. A composite material processing method, characterized in that: The composite material processing method comprises the following steps: Two sheets of metal foil are provided; A welding joint surface is formed between two metal foils by welding; At least one layer of polymer material is compounded on at least one outer surface of the metal foil to obtain a composite material.

2. The composite material processing method according to claim 1, characterized in that: The step of compounding at least one polymer material layer on at least one outer surface of the metal foil to obtain a composite material comprises: At least one polymer material layer and at least one metal layer are compounded on at least one outer surface of the metal foil to obtain a composite material.

3. The composite material processing method according to claim 2, characterized in that: The polymer material layers and the metal layers are alternately stacked.

4. The composite material processing method according to claim 1, characterized in that: The metal foil includes copper foil.

5. The composite material processing method according to claim 1, characterized in that: The steps of forming a welding joint surface between two metal foils by welding include: Two metal foils are stacked and placed, and a diffusion welding press is used to heat and pressurize along a preset welding area to weld the two metal foils together, forming a welding joint surface between the two metal foils.

6. The composite material processing method according to claim 1, characterized in that: The step of compounding at least one polymer material layer on at least one outer surface of the metal foil to obtain a composite material comprises: At least one layer of polymer material is compounded on at least one outer surface of the metal foil by gluing to obtain a composite material.

7. The composite material processing method according to any one of claims 1 to 6, characterized in that: The thickness of the metal foil is 0.1-200 μm.

8. The composite material processing method according to any one of claims 1 to 6, characterized in that: The thickness of the polymer material layer is 0.1-200 μm.

9. A composite material having a welding interface, characterized in that: At least a portion of the composite material is a welding joint surface, and the composite material is processed by the composite material processing method according to any one of claims 1 to 8.

10. An electronic device, characterized in that: The electronic device comprises the composite material with a welding joint surface as claimed in claim 9.

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