CN107666801B - Shell manufacturing method, shell and electronic equipment - Google Patents

Abstract

The embodiment of the present application provides a shell manufacturing method, a shell and an electronic device, the shell manufacturing method comprising: providing a metal shell, the metal shell having a surface; sandblasting the surface; oxidizing the surface after sandblasting; determining a first area on the surface; performing a first spray painting on the surface to form a pearlescent pigment layer on the surface; removing the portion of the pearlescent pigment layer located in the first area. The shell provided in the embodiment of the present application has an oxide layer formed on the surface of the shell and a pearlescent pigment layer formed in the second area of the surface, so that the oxide layer and the pearlescent pigment layer can protect the shell and prevent the shell from being oxidized during use, that is, improve the corrosion resistance of the shell, thereby improving the structural stability of the shell.

Description

Housing manufacturing method, housing and electronic device

technical field

The present application relates to the technical field of electronic devices, and in particular, to a method for manufacturing a casing, a casing and an electronic device.

Background technique

At present, the raw materials for the preparation and processing of casings of electronic devices, such as smart phones and tablet computers, are usually aluminum materials, such as aluminum alloys. Commercially purchased aluminum materials cannot be directly used due to problems such as their own hardness, and the raw aluminum materials need to be processed multiple times to form the required shell structure. However, since the surface of the aluminum material is easily oxidized, the casing formed by processing the aluminum material cannot meet the requirements of electronic equipment.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a method for manufacturing a casing, a casing and an electronic device, which can improve the structural stability of the casing.

An embodiment of the present application provides a method for manufacturing a casing, where the casing is used for an electronic device, and the method for manufacturing the casing includes:

providing a metal shell, the metal shell has a surface;

sandblasting the surface to form a sandblasted surface on the surface;

performing oxidation treatment on the sandblasted surface to form an oxide layer on the surface;

determining a first region on the surface;

performing a first painting treatment on the surface to form a pearlescent pigment layer on the surface;

The portion of the pearlescent pigment layer located in the first region is removed.

The embodiment of the present application further provides a casing, the casing is used for an electronic device, and the casing is formed by the above-mentioned casing manufacturing method.

An embodiment of the present application further provides a casing, the casing is used for an electronic device, the casing has a surface, the surface includes a first area and a second area, and the first area is a sandblasted surface, The second region is formed with a pearlescent pigment layer.

An embodiment of the present application further provides an electronic device, the electronic device includes a casing, and the casing is the above-mentioned casing.

In the case provided by the embodiments of the present application, since an oxide layer is formed on the surface of the case, and a pearlescent pigment layer is formed in the second area of the surface, the oxide layer and the pearlescent pigment layer can protect the case It can prevent the oxidation of the casing during use, that is, improve the corrosion resistance of the casing, thereby improving the structural stability of the casing, thereby prolonging the life of the electronic device.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.

FIG. 2 is a schematic diagram of the first structure of the housing provided by the embodiment of the present application.

FIG. 3 is a schematic diagram of a second structure of the housing provided by the embodiment of the present application.

FIG. 4 is a partial enlarged schematic view of the area A in the housing shown in FIG. 3 .

FIG. 5 is a schematic diagram of a third structure of the housing provided by the embodiment of the present application.

FIG. 6 is a partial enlarged schematic view of the B region in the housing shown in FIG. 5 .

FIG. 7 is a first schematic flow chart of a method for manufacturing a casing provided by an embodiment of the present application.

FIG. 8 is a schematic flow chart of a second method of manufacturing a casing provided by an embodiment of the present application.

FIG. 9 is a schematic flow chart of a third method for manufacturing a casing provided by an embodiment of the present application.

FIG. 10 is a schematic diagram of the first form of the casing provided in the embodiment of the present application in the manufacturing process.

FIG. 11 is a schematic diagram of the second form of the casing provided in the embodiment of the present application in the manufacturing process.

FIG. 12 is a schematic diagram of a third form of the casing provided in the embodiment of the present application in the manufacturing process.

FIG. 13 is a schematic diagram of a fourth form of the casing provided in the embodiment of the present application in the manufacturing process.

FIG. 14 is a schematic diagram of the fifth form of the casing provided in the embodiment of the present application in the manufacturing process.

FIG. 15 is a schematic diagram of the sixth form of the casing provided in the embodiment of the present application in the manufacturing process.

FIG. 16 is a schematic diagram of the seventh form of the casing provided in the embodiment of the present application in the manufacturing process.

FIG. 17 is a schematic diagram of the eighth form of the casing provided in the embodiment of the present application in the manufacturing process.

FIG. 18 is a schematic diagram of the ninth form of the housing provided in the embodiment of the present application in the manufacturing process.

FIG. 19 is a schematic diagram of the tenth form of the casing provided in the embodiment of the present application in the manufacturing process.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc., or The positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as a limitation on this application. In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined as "first", "second" may expressly or implicitly include one or more of said features. In the description of the present application, "plurality" means two or more, unless otherwise expressly and specifically defined.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection, electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements relation. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In this application, unless otherwise expressly specified and defined, a first feature "on" or "under" a second feature may include direct contact between the first and second features, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the application. Furthermore, this application may repeat reference numerals and/or reference letters in different instances for the purpose of simplicity and clarity, and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, this application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

Embodiments of the present application provide an electronic device. The electronic device may be a smart phone, a tablet computer or the like. Referring to FIG. 1 , the electronic device 100 includes a cover plate 10 , a display screen 20 , a circuit board 30 and a housing 40 .

Wherein, the cover plate 10 is installed on the display screen 20 to cover the display screen 20 . The cover plate 10 may be a transparent glass cover plate. In some embodiments, the cover plate 10 may be a glass cover plate made of a material such as sapphire.

The display screen 20 is mounted on the casing 40 to form a display surface of the electronic device 100 . In some embodiments, the display screen 20 includes a display area 21 and a non-display area 22 . The display area 21 is used to display information such as images and texts. The non-display area 22 does not display information. The bottom of the non-display area 22 may be provided with functional components such as a fingerprint module and a touch control circuit.

In some embodiments, the display screen 20 is a liquid crystal display screen or an organic light emitting diode display screen.

The circuit board 30 is installed inside the housing 40 . The circuit board 30 may be the main board of the electronic device 100 . Functional components such as a camera, a proximity sensor, and a processor may be integrated on the circuit board 30 . Meanwhile, the display screen 20 may be electrically connected to the circuit board 30 .

In some embodiments, a display control circuit is provided on the circuit board 30 . The display control circuit outputs electrical signals to the display screen 20 to control the display screen 20 to display information.

The housing 40 is used to accommodate internal electronic components of the electronic device 100 , such as circuit boards, batteries, and the like. Meanwhile, the housing 40 forms the outer contour of the electronic device 100 .

In some embodiments, referring to FIG. 2 , FIG. 2 is a cross-sectional view of the housing 40 in the electronic device 100 shown in FIG. 1 along the P-P direction. The casing 40 is a metal casing. For example, the material of the housing 40 may be aluminum, aluminum alloy, or magnesium alloy.

It should be noted that, in practical applications, some non-metals may be attached to the metal casing 40 in the electronic device 100 . For example, a plastic piece is attached to one side of the housing 40 . At this time, the part attached to the casing 40 can be installed on the casing 40 after the casing 40 is fabricated. Therefore, it should be understood that the non-metallic part attached to the casing 40 does not belong to the casing. Only the metal casing is described in this application.

The housing 40 has a surface 401 . The surface 401 is the outer surface of the casing 40 , that is, the side visible to the user in the electronic device 100 . Wherein, the surface 401 may be sandblasted, so that the surface 401 is formed as a sandblasted surface.

An oxide layer 41 is formed on the surface 401 . The oxide layer 41 may be formed by oxidizing the metal material of the casing 40 . For example, if the material of the casing 40 is aluminum alloy, the oxide layer 41 may be aluminum oxide. The thickness of the oxide layer 41 may be several tens of micrometers, for example, 30 micrometers. The thickness of the casing 40 may be several millimeters, for example, 4 millimeters. Therefore, the oxide layer 41 on the case 40 is thin relative to the case 40 . Since the oxide layer 41 is formed by oxidizing the metal material of the casing 40 , the surface of the oxide layer 41 is still a sandblasted surface, and the oxide layer 41 does not change the sandblasted surface texture of the casing surface 401 .

A thin film layer 42 may be formed on the oxide layer 41 by a physical vapor deposition method. The thickness of the thin film layer 42 is smaller than that of the oxide layer 41 . For example, the thickness of the thin film layer 42 may be 5 microns. Since the thin film layer 42 is formed by the physical vapor deposition method, and the thin film layer 42 is very thin, the thin film layer 42 will not affect the sandblasted surface texture of the casing surface 401 . It should be noted that the thin film layer 42 is not necessary for the casing 40 . In some other embodiments, the surface 401 of the casing 40 may not form the thin film layer 42 .

The surface 401 of the housing 40 includes a first area 402 and a second area 403 . The second region 403 is formed with a pearlescent pigment layer 43 . Among them, pearlescent pigments have a physical structure similar to that of pearls in cross section, the inner core is mica with low optical refractive index, and the outer layer is metal oxide with high refractive index, such as titanium dioxide or iron oxide. Pearlescent pigments show different effects in use depending on the size of their particles. In general, the larger the particle, the stronger the shimmering effect and the weaker the covering power of the base color; on the contrary, the smaller the particle, the stronger the covering power of the base color and the softer the gloss.

In the embodiment of the present application, the pearlescent pigment layer 43 in the second area 403 can cover the sandblasting surface effect in the second area 403 . Therefore, a part of the surface 401 of the casing 40 (ie the first area 402 ) is a sandblasted surface with the texture of a sandblasted surface, and the other part of the surface 401 (ie the second area 403 ) is a pearlescent pigment layer with pearlescent The color effect of the paint.

It should be noted that although FIG. 2 shows that the surface 401 of the housing 40 only includes two regions 402 and 403 , in other embodiments, the surface 401 may also include multiple regions. For example, surface 401 may include three regions, four regions, or the like.

In some embodiments, reference is made to FIGS. 3 and 4 . A primer layer 44 and a pearlescent pigment layer 43 may be formed on the second region 403 of the surface 401 . The pearlescent pigment layer 43 covers the primer layer 44 . Among them, the primer layer is the first layer of the entire paint layer, which is used to improve the adhesion of other coatings, increase the fullness of other coatings, provide alkali resistance, provide anti-corrosion functions, etc., and can ensure the uniformity of other coatings. Absorbs for best results throughout the entire paint layer. The primer layer 44 may be a transparent primer, so that the second region 403 still exhibits the color and luster effect of the pearlescent pigment layer 43 .

In some embodiments, reference is made to FIGS. 5 and 6 . A primer layer 44 , a pearlescent pigment layer 43 and a topcoat layer 45 may be formed on the second region 403 of the surface 401 . The pearlescent pigment layer 43 covers the primer layer 44 , and the topcoat layer 45 covers the pearlescent pigment layer 43 . The topcoat layer is the final coating of the entire paint layer, that is, the coating presented to the user. Both the primer layer 44 and the topcoat layer 45 may be transparent, so that the second region 403 still exhibits the color and luster effect of the pearlescent pigment layer 43 .

In the case 40 provided in the embodiment of the present application, since an oxide layer 41 is formed on the surface 401 of the case 40, a pearlescent pigment layer 43 is formed on the second area 403 of the surface 401, so that the oxide layer 41, the pearlescent pigment The layer 43 can protect the casing 40 and prevent the casing 40 from being oxidized during use, that is, improve the corrosion resistance of the casing 40, thereby improving the structural stability of the casing 40, thereby extending the electronic device 100. lifespan.

The embodiments of the present application also provide a method for manufacturing a casing. The shell manufacturing method is used to produce the shell. The housing may be used for the electronic device 100 described above. Referring to FIG. 7 , the method for making the casing includes the following steps:

S110, providing a metal shell, the metal shell having a surface;

Wherein, in the manufacturing process of the casing, a metal casing is first provided, such as the casing 40 shown in FIG. 10 . The casing 40 is a metal casing. The thickness of the housing 40 may be several millimeters, for example 4 millimeters. The housing 40 has a surface 401 . Surface 401 is the outer surface of housing 40 , ie, the user-visible side of the electronic device.

S120, performing sandblasting on the surface to form a sandblasting surface on the surface;

After the casing 40 is obtained, sandblasting is performed on the surface 401 of the casing 40 to form a sandblasted surface on the surface 401 , as shown in FIG. 12 .

Among them, sandblasting refers to the process of cleaning and roughening the surface of the substrate by the impact of high-speed sand flow. In the sand blasting process, compressed air is used as the power to form a high-speed jet beam to spray the spray material (copper ore sand, quartz sand, emery, iron sand, Hainan sand, etc.) to the surface of the workpiece to be treated at a high speed. Due to the impact and cutting action of the spray material on the surface of the workpiece, the surface of the workpiece can obtain the required roughness. After the sandblasting process, the sandblasted surface formed on the surface 401 has a certain roughness, so it can present a grainy texture during the user's touch.

S130, performing oxidation treatment on the surface after the sandblasting treatment to form an oxide layer on the surface;

After sandblasting the surface 401 of the casing 40 , the sandblasted surface 401 may be oxidized to form an oxide layer 41 on the surface, as shown in FIG. 13 .

Specifically, the surface 401 of the casing 40 may be oxidized through an anodizing process. Therein, the surface 401 of the casing 40 may be placed in an electrolyte (eg, dilute sulfuric acid), and then a current may be applied to the casing 40 . The casing 40 is used as an anode, and a material such as a lead plate or a carbon rod is additionally provided as a cathode to realize anodization of the casing 40 . After the oxidation is completed, an oxide layer 41 can be formed on the surface of the casing 40 . The thickness of the oxide layer 41 may be several tens of micrometers, for example, 30 micrometers.

Since the oxide layer 41 is formed by oxidizing the metal material of the casing 40 , the surface of the oxide layer 41 is still a sandblasted surface, and the oxide layer 41 does not change the sandblasted surface texture of the casing surface 401 .

S140, determining a first region on the surface;

Wherein, after the oxide layer 41 is formed on the surface 401 of the casing 40 , a first region 402 and a second region 403 are defined on the surface 401 , as shown in FIG. 15 . The sizes of the first area 402 and the second area 403 can be determined according to requirements. For example, the first area 402 may be the upper half of the housing 40 , and the second area 403 may be the lower half of the housing 40 .

S150, performing a first spray painting process on the surface to form a pearlescent pigment layer on the surface;

After the oxide layer 41 is formed on the surface 401 of the casing 40 , the surface 401 is subjected to a first painting process to form a pearlescent pigment layer 43 on the surface 401 . The state in which the pearlescent pigment layer 43 is formed on the surface 401 of the housing 40 can be referred to FIG. 18 . Wherein, the raw material used in the first painting treatment can be pearlescent pigments. The cross-section of pearlescent pigments has a physical structure similar to that of pearls. The inner core is mica with low optical refractive index, and the outer layer is metal oxide with high refractive index, such as titanium dioxide or iron oxide. Pearlescent pigments show different effects in use depending on the size of their particles. In general, the larger the particle, the stronger the shimmering effect and the weaker the covering power of the base color; on the contrary, the smaller the particle, the stronger the covering power of the base color and the softer the gloss. After the first spray painting process is completed, a pearlescent pigment layer 43 can be formed on the surface 401 .

S160, removing the part of the pearlescent pigment layer located in the first region.

After the pearlescent pigment layer 43 is formed on the surface 401 of the casing 40 , the part of the pearlescent pigment layer 43 located in the first region 402 is removed, as shown in FIG. 2 . Specifically, the part of the pearlescent pigment layer 43 located in the first region 402 may be removed by a mechanical processing method. For example, the part of the pearlescent pigment layer 43 located in the first region 402 is scraped off. In some other embodiments, a chemical method or an electrochemical method may also be used to remove the part of the pearlescent pigment layer 43 located in the first region 402 , which is not limited in this embodiment of the present application.

After removing the part of the pearlescent pigment layer 43 located in the first area 402, the exposed surface of the first area 402 is the oxide layer 41, and the surface of the oxide layer 41 is a sandblasted surface, so The exposed surface of the second region 403 is the pearlescent pigment layer 43 . Therefore, a part of the surface 401 of the casing 40 (ie the first area 402 ) is a sandblasted surface with the texture of a sandblasted surface, and the other part of the surface 401 (ie the second area 403 ) is a pearlescent pigment layer with pearlescent The color effect of the paint.

In some embodiments, as shown in FIG. 8, in step S140, after the first area is determined on the surface, the shell manufacturing method further includes the following steps:

S171, spray a shielding layer on the first area.

Wherein, after the first area 402 is determined on the surface 401 of the casing 40 , a shielding layer 46 may be sprayed on the first area 402 , as shown in FIG. 16 . The shielding layer 46 is used for shielding the portion of the oxide layer 41 located in the first region 402 to avoid influence on the oxide layer in the first region 402 in the subsequent fabrication process.

In some embodiments, the shielding layer 46 is an ink layer.

In some embodiments, as shown in FIG. 8 , in step S171, after spraying a shielding layer on the first area, the method for fabricating the shell further includes the following steps:

S172, performing a second painting treatment on the surface to form a primer layer on the surface.

After the shielding layer 46 is formed in the first region 402 , the surface 401 of the housing 40 may be subjected to a second painting process to form a primer layer 44 on the surface 401 , as shown in FIG. 17 . . The raw material used in the second painting treatment may be a primer. Among them, the primer layer is the first layer of the entire paint layer, which is used to improve the adhesion of other coatings, increase the fullness of other coatings, provide alkali resistance, provide anti-corrosion functions, etc., and can ensure the uniformity of other coatings. Absorbs for best results throughout the entire paint layer. Primer layer 44 may be a clear primer.

In some embodiments, as shown in FIG. 8 , in step S172 , performing a second painting process on the surface to form a primer layer on the surface, the shell manufacturing method further includes the following steps:

S173, performing a first high temperature treatment on the surface.

Wherein, after the primer layer 44 is formed on the surface 401 of the housing 40, the surface 401 may be subjected to a first high temperature treatment to speed up the curing and molding of the primer layer 44, so that the primer layer 44 is more Stablize.

In some embodiments, the first high temperature treatment may be a bake treatment. For example, the surface 401 can be baked for 30 minutes at a baking temperature of 80 degrees.

In some embodiments, as shown in FIG. 8 , in step S150 , the surface is subjected to a first painting process to form a pearlescent pigment layer on the surface, and the shell manufacturing method further includes the following steps:

S174, performing a second high temperature treatment on the surface.

Wherein, after the pearlescent pigment layer 43 is formed on the surface 401 of the housing 40, the surface 401 may be subjected to a second high temperature treatment to speed up the curing and molding of the pearlescent pigment layer 43, so that the pearlescent pigment layer 43 is more Stablize.

In some embodiments, the second high temperature treatment may be a bake treatment. For example, the surface 401 may be baked for 20 minutes at a baking temperature of 90 degrees. It should be noted that the second high-temperature treatment and the first high-temperature treatment may have different methods and set treatment conditions.

In some embodiments, as shown in FIG. 8 , in step S150 , the surface is subjected to a first painting process to form a pearlescent pigment layer on the surface, and the shell manufacturing method further includes the following steps:

S175, performing a third spray painting process on the surface to form a topcoat layer on the surface.

After the pearlescent pigment layer 43 is formed on the surface 401 of the housing 40 , the surface 401 may be subjected to a third spray painting process to form a topcoat layer 45 on the surface, as shown in FIG. 19 . The raw material used in the third painting treatment may be a topcoat. The topcoat layer is the final coating of the entire paint layer, that is, the coating presented to the user. The topcoat 45 may be clear. Therefore, the surface 401 of the casing 40 still exhibits the effect of the pearlescent pigment layer 43 .

In some embodiments, as shown in FIG. 8 , in step S175 , after the third spray painting treatment is performed on the surface, the shell manufacturing method further includes the following steps:

S176, performing a third high temperature treatment on the surface.

Wherein, after the topcoat layer 45 is formed on the surface 401 of the housing 40, the surface 401 may be subjected to a third high temperature treatment to speed up the curing and molding of the topcoat layer 45, so that the topcoat layer 45 is more Stablize.

In some embodiments, the third high temperature treatment may be a bake treatment. For example, the surface 401 may be baked for 10 minutes at a baking temperature of 100 degrees. It should be noted that the third high-temperature treatment, the first high-temperature treatment and the second high-temperature treatment may adopt different methods and set treatment conditions.

In some embodiments, as shown in FIG. 8, step S160, removing the part of the pearlescent pigment layer located in the first region includes the following steps:

S161, removing the shielding layer in the first area, the part of the primer layer located in the first area, the part of the pearlescent pigment layer located in the first area, and the topcoat layer the portion within the first region.

Wherein, as shown in FIG. 19 and FIG. 5 , the first area 402 of the surface 401 of the housing 40 is sprayed with a shielding layer 46 , the shielding layer 46 is covered with a primer layer 44 , and the primer layer 44 is A pearlescent pigment layer 43 is covered, and a topcoat layer 45 is covered on the pearlescent pigment layer 44 . When the part of the pearlescent pigment layer 43 located in the first area 402 is removed, the shielding layer 46 in the first area 402 can be removed and the shielding layer 46 in the first area 402 can be removed of all coatings.

After removing the shielding layer 46 and all the coatings on the shielding layer 46, the exposed surface of the first region 402 is the oxide layer 41, and the surface of the oxide layer 41 is a sandblasted surface, so The exposed surface of the second region 403 is the topcoat layer 45 , and the topcoat layer 45 is a transparent topcoat, that is, the second region 403 exhibits the effect of the pearlescent pigment layer 43 . Therefore, a part of the surface 401 of the casing 40 (ie the first area 402 ) is a sandblasted surface with the texture of a sandblasted surface, and the other part of the surface 401 (ie the second area 403 ) is a pearlescent pigment layer with pearlescent The color effect of the paint.

In some embodiments, as shown in FIG. 9, step S110, the step of providing a metal casing includes:

S111, providing a metal substrate;

S112, performing mechanical processing on the metal substrate to obtain a metal casing.

Wherein, when the casing is fabricated, a metal substrate is first provided. The metal substrate may be a commercially available metal plate, such as aluminum material or aluminum alloy. Afterwards, the metal substrate is subjected to mechanical processing to obtain a metal casing of the required shape, size and thickness. Wherein, the machining process may include processing processes such as cutting, forging or stamping.

In some embodiments, as shown in FIG. 9 , in step S120, before sandblasting the surface, the shell manufacturing method further includes:

S181, polishing the surface.

Before sandblasting the surface 401 of the casing 40 , the surface 401 may be polished to obtain a flat and smooth casing surface, as shown in FIG. 11 . Among them, polishing refers to the use of mechanical, chemical or electrochemical action to reduce the surface roughness of the workpiece to obtain a bright and smooth surface. After polishing, the surface 401 can be made flat and smooth, so as to facilitate subsequent processing.

In some embodiments, the surface 401 may be polished by grinding. Among them, grinding refers to a processing method in which the physical properties of the surface of the material are changed by friction with the help of rough objects (sandpaper containing higher hardness particles, grinding wheels, etc.). For example, the surface 401 can be ground by a grinding wheel with very fine particle size, so that the surface 401 can be smooth and smooth.

In some embodiments, as shown in FIG. 9 , in step S130, the surface after sandblasting is oxidized to form an oxide layer on the surface, and the method for fabricating the casing further includes the following steps:

S182, performing coloring processing on the oxide layer, so that the oxide layer exhibits a preset color.

Referring to FIG. 13 , after the oxide layer 41 is formed on the surface 401 , the oxide layer 41 may be colored. Specifically, the surface of the oxide layer 41 formed by the oxidation treatment is porous. That is, the surface of the oxide layer 41 has a large number of tiny pores. Dye and crystal water can be adsorbed in the tiny pores. In order to make the surface 401 of the casing show a desired color to meet decorative requirements, after the surface 401 of the casing is oxidized, the casing 40 may be placed in a dye to color the surface 401 of the casing 40 . After the coloring process is completed, the oxide layer 41 can exhibit a preset color, such as blue.

In some embodiments, as shown in FIG. 9 , in step S130, the surface after sandblasting is oxidized to form an oxide layer on the surface, and the method for fabricating the casing further includes the following steps:

S183, performing physical vapor deposition on the surface to form a thin film layer on the surface.

Referring to FIG. 14 , after the oxide layer 41 is formed on the surface 401 , a physical vapor deposition process may be performed on the surface 401 to form a thin film layer 42 on the surface 401 . The thin film layer 42 covers the oxide layer 41 .

Physical vapor deposition (Physical Vapor Deposition, PVD) refers to the use of physical processes to achieve material transfer, the process of transferring atoms or molecules from raw materials to the surface of the workpiece. Its function is to spray some particles with special properties (high strength, wear resistance, heat dissipation, corrosion resistance, etc.) on the workpiece with lower performance, so that the workpiece has better performance.

The thickness of the thin film layer 42 is smaller than that of the oxide layer 41 . For example, the thickness of the thin film layer 42 may be 5 microns. Since the thin film layer 42 is formed by a physical vapor deposition method, and the thin film layer 42 is very thin, the thin film layer 42 will not affect the sandblasted surface texture of the surface of the oxide layer 41 .

The case manufacturing method, the case and the electronic device provided by the embodiments of the present application have been described in detail above. The principles and implementations of the present application are described with specific examples in this paper. The descriptions of the above embodiments are only used to help understanding this application. At the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific embodiments and application scope. To sum up, the content of this specification should not be construed as a limitation to the present application.

Claims (15)

1. A method for making a casing, the casing being used for electronic equipment, wherein the method for making a casing comprises: providing a metal shell, the metal shell has a surface; sandblasting the surface to form a sandblasted surface on the surface; performing oxidation treatment on the sandblasted surface to form an oxide layer on the surface; determining a first region on the surface; Spray a shielding layer on the first area; performing a first painting treatment on the surface to form a pearlescent pigment layer on the surface; The portion of the pearlescent pigment layer located in the first region is removed. 2 . The method for manufacturing a shell according to claim 1 , wherein after the step of spraying a shielding layer on the first area, and before the step of performing the first spray paint treatment on the surface, the The shell manufacturing method further includes: The surface is subjected to a second painting treatment to form a primer layer on the surface. 3 . The method for manufacturing a shell according to claim 2 , wherein after the step of performing the first spray painting treatment on the surface, the removal of the part of the pearlescent pigment layer located in the first area is performed. 4 . Before the step of, the shell making method further includes: The surface is subjected to a third painting treatment to form a topcoat layer on the surface. 4. The method of claim 3, wherein the step of removing the part of the pearlescent pigment layer located in the first region comprises: Remove the shielding layer in the first area, the part of the primer layer located in the first area, the part of the pearlescent pigment layer located in the first area, and the topcoat layer located in the first area. part within the first region. 5 . The method for manufacturing a shell according to claim 2 , wherein after the step of performing the second painting treatment on the surface and before the step of performing the first painting treatment on the surface, the 5 . The manufacturing method of the shell also includes: The surface is subjected to a first high temperature treatment. 6 . The method for manufacturing a shell according to claim 3 , wherein after the step of performing the first painting treatment on the surface and before the step of performing the third painting treatment on the surface, the The manufacturing method of the shell also includes: A second high temperature treatment is performed on the surface. 7 . The method for manufacturing a casing according to claim 3 , wherein after the step of performing the third spray painting treatment on the surface, the removing the part of the pearlescent pigment layer located in the first area is performed. 8 . Before the step of, the shell making method further includes: The surface is subjected to a third high temperature treatment. 8 . The method for manufacturing a casing according to claim 1 , wherein the shielding layer is an ink layer. 9 . 9 . The method for manufacturing a shell according to claim 1 , wherein before the step of sandblasting the surface, the method for manufacturing the shell further comprises: 10 . The surface is polished. 10 . The method for manufacturing a casing according to claim 9 , wherein the polishing treatment comprises a grinding treatment. 11 . 11. The method for manufacturing a casing according to any one of claims 1 to 7, wherein after the step of performing oxidation treatment on the surface after sandblasting, so as to form an oxide layer on the surface, The shell manufacturing method also includes: Coloring treatment is performed on the oxide layer, so that the oxide layer exhibits a preset color. 12 . The method for manufacturing a casing according to claim 1 , wherein after the step of performing oxidation treatment on the surface after sandblasting, so as to form an oxide layer on the surface, 12 . Before the step of determining the first area on the surface, the method for manufacturing the shell further includes: A physical vapor deposition process is performed on the surface to form a thin film layer on the surface. 13. The method for manufacturing a casing according to any one of claims 1 to 7, wherein the step of providing a metal casing comprises: providing a metal substrate; The metal substrate is machined to obtain a metal casing. 14 . A casing, wherein the casing is used for an electronic device, and the casing is formed by using the casing manufacturing method according to any one of claims 1 to 13 . 15 . An electronic device, characterized in that, the electronic device comprises a casing, and the casing is the casing of claim 14 .