CN114351205A - Electronic equipment, appearance piece and preparation method thereof - Google Patents
Electronic equipment, appearance piece and preparation method thereof Download PDFInfo
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- CN114351205A CN114351205A CN202210053193.1A CN202210053193A CN114351205A CN 114351205 A CN114351205 A CN 114351205A CN 202210053193 A CN202210053193 A CN 202210053193A CN 114351205 A CN114351205 A CN 114351205A
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Abstract
The application provides an electronic device, an appearance piece and a preparation method thereof; the preparation method of the appearance piece comprises the following steps: providing an aluminum alloy substrate; die-casting the aluminum alloy base material by using a vacuum die-casting die to form a semi-finished product; and carrying out anodic oxidation on the semi-finished product. According to the preparation method of the aluminum alloy appearance part, the semi-finished product before anodic oxidation is formed in a vacuum die-casting mode, so that the aluminum alloy appearance part has the characteristics of high structural strength and high surface glossiness.
Description
Technical Field
The invention relates to the technical field of processing technology of an appearance piece of electronic equipment, in particular to electronic equipment, an appearance piece and a preparation method of the appearance piece.
Background
The aluminum alloy appearance piece of the electronic device generally needs to be subjected to surface anodization treatment in order to realize good surface chemical stability, but the blank of the aluminum alloy appearance piece in the conventional technology has the problems of low strength and poor performance of anodization treatment before anodization, so that the final product cannot meet the design requirement of the product.
Disclosure of Invention
The embodiment of the application provides a preparation method of an aluminum alloy appearance piece in a first aspect, and the preparation method comprises the following steps:
providing an aluminum alloy substrate;
die-casting the aluminum alloy base material by using a vacuum die-casting die to form a semi-finished product;
and carrying out anodic oxidation on the semi-finished product.
In a second aspect, embodiments of the present application provide an external appearance piece for use in an electronic device, the external appearance piece being prepared by the preparation method described in any one of the above embodiments.
In addition, this application embodiment provides an electronic equipment again, electronic equipment includes display screen and control circuit board and the outward appearance piece in the above-mentioned embodiment, the display screen with the control circuit board electricity is connected.
According to the preparation method of the aluminum alloy appearance part, the semi-finished product before anodic oxidation is formed in a vacuum die-casting mode, so that the aluminum alloy appearance part has the characteristics of high structural strength and high surface glossiness.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart of an embodiment of a method for producing an aluminum alloy exterior part according to the present application;
FIG. 2 is a schematic cross-sectional structural view of an embodiment of a high vacuum die casting apparatus;
FIG. 3 is a schematic view of the mold after closing;
FIG. 4 is a schematic view of the structure after completion of the shot;
FIG. 5 is an overall flow diagram of the anodization process;
FIG. 6 is a schematic diagram of a back structure of an embodiment of the electronic device of the present application;
FIG. 7 is a schematic cross-sectional view of the electronic device at A-A in the embodiment of FIG. 6;
fig. 8 is a block diagram illustrating a structural composition of an embodiment of an electronic device according to the present application.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be noted that the following examples are only illustrative of the present invention, and do not limit the scope of the present invention. Likewise, the following examples are only some but not all examples of the present invention, and all other examples obtained by those skilled in the art without any inventive step are within the scope of the present invention.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
As used herein, an "electronic device" (or simply "terminal") includes, but is not limited to, an apparatus that is configured to receive/transmit communication signals via a wireline connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network, and/or via a wireless interface (e.g., for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal). A communication terminal arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; a Personal Communications System (PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A cellular phone is an electronic device equipped with a cellular communication module.
The conventional aluminum alloy anode treatment (a process of taking aluminum or an aluminum alloy product as an anode, putting the aluminum or the aluminum alloy product into an electrolyte solution for electrifying treatment and forming an aluminum oxide film on the surface of the aluminum or the aluminum alloy product by utilizing electrolysis, which is called as the anode oxidation treatment of the aluminum or the aluminum alloy, wherein the corrosion resistance, the wear resistance and the decoration property of the aluminum or the aluminum alloy are obviously improved and enhanced) mainly comprises a plurality of schemes. One method is to optimize the material end, and ensure the purity of the die-casting aluminum alloy material by greatly improving the content of aluminum in the die-casting aluminum alloy components, so as to implement the anode performance of the die-casting aluminum. The other is modification by using an oxidation coating, and an anodic oxidation process (micro-arc oxidation) enhanced by plasma arc discharge, because plasma arc light discharge has higher energy density and accelerates chemical reaction on an anode. Gas phase stirring is formed between the substrate and the external ceramic film layer material, so that the substrate and the external ceramic film layer material are fully mixed, reacted and sintered, and the ceramic coating is obtained on the surface. Ceramic phase substances are introduced into the electrolyte, the ceramic film layer has close relation with the external ceramic phase substances, and the components and the compositions of the ceramic phase substances in the liquid medium are changed to obtain the ceramic film layers with different colors and different performances. The amorphous film with excellent physical and chemical properties can be prepared by adopting a special process, and various films can be compounded with each other to form a compounded ceramic layer with different colors and mutually combined component properties so as to cover impurities precipitated on the surface of the die-cast aluminum due to oxidation.
However, the following disadvantages mainly exist in the conventional technical solutions described above. The conventional technical scheme can ensure that the anode-casting aluminum is high in purity (the aluminum content is generally more than 95%) in order to keep the anode-casting performance of the aluminum after die casting, so that the aluminum has low strength and is generally yielded at about 100 MPa. The material has the characteristic of being very soft, so that the application and production of aluminum products are greatly limited, and the material cannot be applied to high-strength products such as mobile phones and the like. In the technical scheme of forming the surface coating by adopting the plasma arc discharge enhanced anodic oxidation process (micro-arc oxidation), the surface glossiness is lower, the color selectivity has limitations, the strength problem of the die-casting aluminum material is still not solved, meanwhile, the oxidation process is easily influenced by impurity elements such as silicon and the like to form an intermetallic compound, and the surface is grey and pockmarked after oxidation.
In view of the above problems, an embodiment of the present application provides a method for manufacturing an aluminum alloy exterior part, please refer to fig. 1, where fig. 1 is a schematic flow chart of an embodiment of the method for manufacturing an aluminum alloy exterior part of the present application; it should be noted that the aluminum alloy exterior part in the present application is mainly used in electronic equipment, and specifically may be a rear case, a side frame, a camera decoration part, and the like of the electronic equipment. The electronic device may include a cell phone, a tablet, a laptop, a wearable device, and the like. The preparation method of the aluminum alloy appearance piece comprises the following steps. It should be noted that the terms "comprises" and "comprising," and any variations thereof, in the embodiments of the present application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or may alternatively include other steps or elements inherent to such process, method, article, or apparatus.
The preparation method comprises the step S100 of providing the aluminum alloy base material.
In this step, aluminum, magnesium, zinc, copper, manganese may be included in the aluminum alloy base material. Optionally, in this embodiment, the mass fraction content of aluminum in the aluminum alloy substrate is 80% to 90%, and specifically may be 80%, 81%, 82%, 85%, 88%, 90%, and other numerical values. The magnesium content is 2-5%, and can be numerical values of 2%, 2.1%, 2.5%, 3%, 4%, 5% and the like; the zinc content is 3-6%, and can be 3%, 3.1%, 3.5%, 4%, 4.5%, 5%, 6% and other numerical values; the copper content is 1-3%, and can be 1%, 1.1%, 1.5%, 1.8%, 2%, 2.5%, 3% and other numerical values; the manganese content of 1% to 3% may be 1%, 1.1%, 1.5%, 1.8%, 2%, 2.5%, 3%, or the like.
Optionally, the aluminum alloy substrate in this embodiment further includes silicon, and the content of the silicon is 0.1% to 1%, and specifically may be 0.1%, 0.2%, 0.3%, 0.5%, 0.8%, 1%, and other values.
Optionally, the aluminum alloy substrate in this embodiment further includes chromium and titanium, where the content of chromium is 0.05% to 0.5%, specifically, may be 0.05%, 0.06%, 0.08%, 0.1%, 0.2%, 3%, 0.5%, and the like; the content of titanium is 0.05-0.5%, and specifically may be 0.05%, 0.06%, 0.08%, 0.1%, 0.2%, 3%, 0.5%, or the like.
The aluminum alloy base material can be formed by selecting a pure aluminum ingot, a pure Mg ingot, a pure Zn ingot, a Cu ingot, a Mn intermediate alloy, a Ti intermediate alloy and a Ni intermediate alloy, wherein the Cr intermediate alloy is used as a raw material for preparing the anodic oxidation die-casting aluminum ingot and is proportioned according to the components; preheating a crucible to 200-300 ℃, baking the crucible to a red-Tong state, and putting the pure aluminum ingot into the crucible to melt the pure aluminum ingot to form aluminum liquid; heating the aluminum liquid to 650 ℃, and sinking the preheated pure Zn ingot into the aluminum liquid by using a bell jar; heating the molten metal to 660-680 ℃, pressing the preheated pure Mg ingot into a bell jar until the pure Mg ingot is completely melted; heating the molten metal to 800-850 ℃, and sequentially putting the Mn intermediate alloy and the Ni intermediate alloy into the crucible for melting; after scum is removed, adding the Ti intermediate alloy for modification; when the temperature of the molten metal is reduced to 680-720 ℃, the molten metal is subjected to slagging, and then a refining agent is immersed into a bell jar for refining until the refining agent does not react any more, and the molten metal is put into an ingot mold to form an ingot, namely the aluminum alloy base material is formed.
Alternatively, the present embodiments provide a material formulation of an aluminum alloy substrate as shown in the following table.
Referring to fig. 1, the method for manufacturing an aluminum alloy exterior part in the present embodiment further includes a step S200 of die-casting the aluminum alloy substrate into a semi-finished product by using a vacuum die-casting mold.
In the embodiment, a vertical high vacuum die casting device is used for die casting to increase the compactness of the gap and eliminate pores in the process. Firstly, pouring, namely melting the aluminum alloy base material obtained according to the proportion to form liquid, and pouring the liquid into an accommodating cavity of high-vacuum die casting equipment. The contact area of the metal liquid and air is reduced as much as possible, and oxide inclusions generated by die casting seeds are reduced. Referring to fig. 2, fig. 2 is a schematic cross-sectional structural view of an embodiment of a high vacuum die casting apparatus, in which reference numeral 201 denotes an upper mold, reference numeral 202 denotes a lower mold, reference numeral 203 denotes a metal liquid pushing device, and reference numeral 204 denotes metal in a liquid molten state.
Next, referring to fig. 3, fig. 3 is a schematic structural diagram of the mold after the mold is closed, and the upper mold 201 and the lower mold 202 are closed to form a molding cavity 210.
Then, the process of injection is followed, wherein the process of injection further comprises two steps: firstly, the injection is carried out slowly, the liquid level rises stably, and gas, oxide impurities and the like are also kept on the top surface of the molten metal. Then, the injection is carried out quickly, gas inclusions are concentrated at an overflow groove or a non-critical part through optimizing the design of a die, and gas holes are mainly concentrated at large-angle corners in a product structure. Referring to fig. 4, fig. 4 is a schematic structural diagram after the injection is completed, and optionally, in the step of die-casting the aluminum alloy substrate to form a semi-finished product by using a vacuum die-casting mold, the pressure in the die-casting mold is 0 to 5pa, specifically, may be 0pa or a value close to 0pa, 1pa, 2pa, 5pa, and the like, and the closer to 0pa, the better.
After the injection filling is completed, the semi-finished product 210a is naturally cooled, and then is taken out for the subsequent anode treatment.
In the embodiment, the material ratio of the aluminum alloy substrate is combined with a vacuum die casting process, solute clusters are formed in the die casting process to be strengthened, when solid solution elements are fused into crystal lattices of the substrate material, solute atoms dissolved into the solid solution cause lattice distortion, a distortion field adsorbs peripheral dislocation, the lattice distortion increases the resistance of dislocation movement, slippage is difficult to perform, and the strength and the hardness of the alloy solid solution are increased. And high-vacuum die casting equipment is adopted, so that the influence of bubbles and porosity in the die casting process is eliminated, and the strength of die-cast aluminum is improved. The properties of the aluminum alloy substrate obtained in this example were as follows: tensile strength: 410Mpa, yield strength 370Mpa and elongation rate 3-5%.
Referring to fig. 1, the method for manufacturing an aluminum alloy exterior part according to the embodiment of the present disclosure further includes a step S300 of anodizing the semi-finished product.
In this step, the method may specifically include the steps of performing surface pretreatment 310, anodic pretreatment 320, and anodic oxidation 330 on the semi-finished product. Referring to fig. 5, fig. 5 is a general flowchart of an anodic oxidation process, wherein the step of surface pretreatment 310 specifically includes first polishing 311, cleaning 312, sand blasting 313, etc., wherein the mirror effect can be achieved after the first polishing 311.
The pretreatment 320 includes degreasing 321, first ash removal 322, second polishing 323, and second ash removal 324. The second polishing 323 may be chemical polishing, and after the chemical polishing, the intermetallic compound precipitated on the surface of the semi-finished product may be removed by a nitric acid ash removal method.
Wherein the step of anodizing 330 may include oxidizing 331, dyeing 332 (if necessary), sealing 333, and the like. Optionally, in the process of oxidizing 331, specifically, a mixed solution of oxalic acid and sulfuric acid may be used, and optionally, the amount ratio of the substances of oxalic acid and sulfuric acid in the mixed solution is 1: 1 to 1: 2. Namely, the anodic oxidation process in the embodiment of the present application employs low corrosion oxidation. It should be noted that the terms "first", "second" and "third" in the embodiments of the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
According to the preparation method of the aluminum alloy appearance part, the atom cluster strengthening and vacuum die-casting processes are adopted, meanwhile, the anodic oxidation process is properly adjusted, the material strength is improved, the appearance effect after anodic oxidation is guaranteed, and the problem that conventional die-casting aluminum cannot be subjected to anode is solved. The technical scheme in the embodiment of the application adopts an atomic cluster strengthening mechanism, and atomic cluster strengthening is formed by adjusting element components in material components, so that dislocation is caused, and the die-casting aluminum strength is increased. Meanwhile, a vacuum die-casting method is adopted, so that the compactness of die-cast aluminum in the die-casting process is improved, and the defects of air holes and the like are reduced. The die-casting aluminum can realize various anodic oxidation appearance effects at very low cost under the condition of ensuring the strength.
Further, an electronic device is provided in an embodiment of the present application, please refer to fig. 6 and fig. 7 together, where fig. 6 is a back structure schematic diagram of an embodiment of the electronic device of the present application, and fig. 7 is a cross-sectional structure schematic diagram of the electronic device at a-a position in the embodiment of fig. 6, and the electronic device in the embodiment includes a display module 30, a housing assembly 10, and a control circuit board 20. The housing assembly 10 may include a housing 100, a middle frame 200, and a camera decoration 300. It should be noted that, in the embodiment of the present application, the electronic device is only described in a structure that the electronic device includes the middle frame, and in some other embodiments, the electronic device may not include the middle frame structure, that is, a structure that a rear cover plate (the housing 100) of the housing assembly directly cooperates with the display screen module 30, which is not limited herein. The housing 100, the middle frame 200, and the camera head decoration 300 in the present embodiment may be appearance pieces obtained by the manufacturing method in the foregoing embodiments. It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present application are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
Optionally, the display screen module 30, the housing 100 of the housing assembly 10 and the camera decoration 300 are respectively disposed on two opposite sides of the electronic device. The display screen module 30 and the housing 100 cooperate to form an accommodating space 1000, and the control circuit board 20 is disposed in the accommodating space 1000. The control circuit board 20 is electrically connected to the display screen module 30, and the control circuit board 20 is used for controlling the operating state of the display screen module 30. The detailed technical features of other parts of the electronic device are within the understanding of those skilled in the art, and are not described herein.
Referring to fig. 8, fig. 8 is a block diagram illustrating a structural composition of an embodiment of an electronic device according to the present application, where the electronic device may be a mobile phone, a tablet computer, a notebook computer, a wearable device, and the like, and the embodiment illustrates a mobile phone as an example. The electronic device may include an RF circuit 910, a memory 920, an input unit 930, a display unit 940 (i.e., the display module 30 in the above embodiment), a sensor 950, an audio circuit 960, a wifi module 970, a processor 980 (which may be the control circuit board 20 in the above embodiment), a power supply 990, and the like. Wherein the RF circuit 910, the memory 920, the input unit 930, the display unit 940, the sensor 950, the audio circuit 960, and the wifi module 970 are respectively connected with the processor 980; power supply 990 is operable to provide power to the entire electronic device 10.
Specifically, the RF circuit 910 is used for transmitting and receiving signals; the memory 920 is used for storing data instruction information; the input unit 930 is used for inputting information, and may specifically include a touch panel 931 and other input devices 932 such as operation keys; the display unit 940 may include a display panel 941; the sensor 950 includes an infrared sensor, a laser sensor, etc. for detecting a user approach signal, a distance signal, etc.; a speaker 961 and a microphone 962 are connected to the processor 980 through the audio circuit 960 for emitting and receiving sound signals; the wifi module 970 is used for receiving and transmitting wifi signals, and the processor 980 is used for processing data information of the electronic device. For specific structural features of the electronic device, please refer to the related description of the above embodiments, and detailed descriptions thereof will not be provided herein.
In the electronic device in this embodiment, the aluminum alloy exterior piece forms a semi-finished product before anodizing in a vacuum die casting manner, so that the aluminum alloy exterior piece has the characteristics of high structural strength and high surface glossiness.
The above description is only a part of the embodiments of the present invention, and not intended to limit the scope of the present invention, and all equivalent devices or equivalent processes performed by the present invention through the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method for manufacturing an aluminum alloy exterior part, characterized by comprising:
providing an aluminum alloy substrate;
die-casting the aluminum alloy base material by using a vacuum die-casting die to form a semi-finished product;
and carrying out anodic oxidation on the semi-finished product.
2. The method of claim 1, wherein the aluminum alloy substrate comprises aluminum, magnesium, zinc, copper, manganese.
3. The preparation method according to claim 1, wherein the aluminum alloy base material contains 80-90% by mass of aluminum, 2-5% by mass of magnesium, 3-6% by mass of zinc, 1-3% by mass of copper, and 1-3% by mass of manganese.
4. The preparation method according to claim 3, wherein the aluminum alloy base material further comprises silicon, and the content of the silicon is 0.1% -1%.
5. The preparation method of claim 4, wherein the aluminum alloy base material further comprises chromium and titanium, wherein the chromium content is 0.05% -0.5%, and the titanium content is 0.05% -0.5%.
6. The production method according to claim 1, wherein in the step of die-casting the aluminum alloy base material into the semi-finished product by using the vacuum die-casting mold, a pressure in the die-casting mold is 0 to 5 pa.
7. The production method according to claim 1, wherein in the step of anodizing the semi-finished product, oxidation is performed using a mixed solution of oxalic acid and sulfuric acid.
8. The production method according to claim 7, wherein the mass ratio of oxalic acid and sulfuric acid in the mixed solution is 1: 1 to 1: 2.
9. An exterior member for use in electronic equipment, wherein the exterior member is produced by the production method according to any one of claims 1 to 8.
10. An electronic device comprising a display screen and a control circuit board, the display screen and the control circuit board being electrically connected, and the appearance member of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210053193.1A CN114351205A (en) | 2022-01-17 | 2022-01-17 | Electronic equipment, appearance piece and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210053193.1A CN114351205A (en) | 2022-01-17 | 2022-01-17 | Electronic equipment, appearance piece and preparation method thereof |
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| CN114351205A true CN114351205A (en) | 2022-04-15 |
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|---|---|---|---|
| CN202210053193.1A Pending CN114351205A (en) | 2022-01-17 | 2022-01-17 | Electronic equipment, appearance piece and preparation method thereof |
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| Country | Link |
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| CN (1) | CN114351205A (en) |
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