Housing and preparation method therefor, and electronic device

Abstract

The present application relates to the technical field of terminals, and provides a housing and a preparation method therefor, and an electronic device. The housing comprises: a housing substrate, an oxide layer, and a transparent conversion layer, wherein the housing substrate at least has a matte region and a high-gloss region, the outer surface of the housing substrate in the matte region is a sandblasted surface, and the outer surface of the housing substrate in the high-gloss region is a high-gloss surface; the oxide layer is disposed in the matte region and covers the sandblasted surface; and the transparent conversion layer is at least disposed in the high-gloss region and covers the high-gloss surface. In this way, the sandblasted surface and the high-gloss surface are respectively formed in different regions of the outer surface of the housing substrate; in addition, the oxide layer covers the sandblasted surface, so that the sandblasted surface has a three-dimensional sandblasted effect and gloss, and the transparent conversion layer at least covers the high-gloss surface, so that the high-gloss effect of the high-gloss surface can be maintained. The matte and high-gloss textures of the housing transition naturally, thereby improving the appearance quality of the housing, and further improving the appearance quality of the electronic device using the housing.

Description

Shell and preparation method thereof, and electronic device TECHNICAL FIELD

[0001] The present application relates to the technical field of terminals, and in particular to a shell and a preparation method thereof, and an electronic device. BACKGROUND

[0002] With the development of science and technology, electronic devices such as notebook computers and tablet computers are becoming more and more popular in people's lives. Currently, an aluminum alloy or the like is often used to manufacture a shell of an electronic device, so as to have a good protection effect and a unique metallic texture. With the increasing demand for appearance, the shell can also be surface treated to have a better protection and decoration effect.

[0003] Bright and matte homogeneity is an appearance effect that combines two different textures of brightness and matte, and that processes an appearance surface of an electronic device through a specific surface treatment process, so as to make the appearance surface present two different visual effects of bright and matte in different regions. However, the traditional process often has problems of long process and high cost when processing the appearance surface of the electronic device to form the bright and matte homogeneity effect.

[0004] SUMMARY

[0005] The present application provides a shell and a preparation method thereof, and an electronic device. The shell has a sand surface and a high-brightness surface in different regions of an outer surface of a shell substrate, and simultaneously, an oxidation layer covers the sand surface, so that the sand surface has a three-dimensional sand effect and gloss, and a transparent finished layer covers at least the high-brightness surface, so as to maintain the high-brightness effect of the high-brightness surface. The two textures of matte and high brightness of the shell naturally connect, the appearance quality of the shell is improved, and the appearance quality of the electronic device using the shell is improved.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] In a first aspect, a shell is provided, which includes a shell substrate, an oxidation layer, and a transparent finished layer. The shell substrate has at least a matte region and a high-brightness region. The outer surface of the shell substrate in the matte region is a sand surface, and the outer surface of the shell substrate in the high-brightness region is a high-brightness surface. The oxidation layer is arranged in the matte region and covers the sand surface. The transparent finished layer is arranged in at least the high-brightness region and covers the high-brightness surface.

[0008] The shell provided by the present application has a sand surface and a high-brightness surface in different regions of an outer surface of a shell substrate, and simultaneously, an oxidation layer covers the sand surface, so that the sand surface has a three-dimensional sand effect and gloss, and a transparent finished layer covers at least the high-brightness surface, so as to maintain the high-brightness effect of the high-brightness surface. The two textures of matte and high brightness of the shell naturally connect, the appearance quality of the shell is improved, and the appearance quality of the electronic device using the shell is improved.

[0009] In a possible implementation manner of the first aspect, the oxidation layer is a pre-oxidation layer, the pre-oxidation layer is not dyed, and the outer surface of the pre-oxidation layer has a plurality of pores.

[0010] In the implementation manner, the pre-oxidation layer is formed on the outer surface of the sand surface away from the shell base material, the pre-oxidation layer is subjected to an oxidation treatment but not subjected to a dyeing treatment, and the pre-oxidation layer can well present the metallic luster and three-dimensional sand effect of the sand surface. In addition, since the pores in the pre-oxidation layer are not subjected to a pore sealing treatment, the conductivity of the shell base material can be maintained, so that the subsequent electrophoresis process can be facilitated.

[0011] In a possible implementation manner of the first aspect, the shell member further comprises an electrophoresis layer, the electrophoresis layer is arranged in the matte area and the highlight area, and the electrophoresis layer covers at least one of the transparentization layer and the pre-oxidation layer.

[0012] In the implementation manner, the outermost layer of the shell member is the colored translucent electrophoresis layer, the electrophoresis layer can protect the film layer between the electrophoresis layer and the shell base material, and the shell member can present the natural matte effect and the highlight effect, so that the appearance is more beautiful and diversified.

[0013] In a possible implementation manner of the first aspect, along a direction perpendicular to the thickness of the shell member, the matte area comprises the oxidation layer and the transparentization layer arranged in sequence on the sand surface, and the highlight area comprises the transparentization layer.

[0014] In the implementation manner, a bright-matte shell member with a more beautiful appearance is obtained.

[0015] In a possible implementation manner of the first aspect, the matte area comprises the oxidation layer, and the highlight area comprises the transparentization layer.

[0016] In the implementation manner, a bright-matte shell member with a more beautiful appearance is obtained.

[0017] In a possible implementation manner of the first aspect, along a direction perpendicular to the thickness of the shell member, the matte area comprises the oxidation layer and the transparentization layer, and the transparentization layer is arranged on at least part of the outer surface of the oxidation layer away from the shell base material; and the highlight area comprises the transparentization layer.

[0018] In the implementation manner, a bright-matte shell member with a more beautiful appearance is obtained.

[0019] In a possible implementation manner of the first aspect, along a direction perpendicular to the thickness of the shell member, the matte area comprises the pre-oxidation layer, the transparentization layer and the electrophoresis layer arranged in sequence on the sand surface, and the material of the transparentization layer fills the pores of the pre-oxidation layer; and the highlight area comprises the transparentization layer and the electrophoresis layer arranged in sequence on the highlight surface.

[0020] In the implementation, the bright and matte shell piece with a more beautiful appearance surface is obtained.

[0021] In a possible implementation of the first aspect, along a direction perpendicular to the thickness of the shell piece, the matte area includes a pre-oxidation layer and an electrophoretic layer which are sequentially arranged on the sand surface, and the material of the electrophoretic layer fills the pores of the pre-oxidation layer; and the highlight area includes a transparent chemical layer and an electrophoretic layer which are sequentially arranged on the highlight surface.

[0022] In the implementation, the bright and matte shell piece with a more beautiful appearance surface is obtained.

[0023] In a possible implementation of the first aspect, along a direction perpendicular to the thickness of the shell piece, the matte area includes a pre-oxidation layer, a transparent chemical layer and an electrophoretic layer, the transparent chemical layer is arranged between the pre-oxidation layer and the electrophoretic layer and covers part of the outer surface of the pre-oxidation layer, the electrophoretic layer covers the remaining part of the outer surface of the pre-oxidation layer and the transparent chemical layer, and the material of the transparent chemical layer and the material of the electrophoretic layer fill the pores of the pre-oxidation layer; and the highlight area includes a transparent chemical layer and an electrophoretic layer which are sequentially arranged on the highlight surface.

[0024] In the implementation, the bright and matte shell piece with a more beautiful appearance surface is obtained.

[0025] In a possible implementation of the first aspect, the pre-oxidation layer is obtained through alkali washing, chemical polishing, oxidation and curing treatment.

[0026] In the implementation, the pre-oxidation layer is subjected to oxidation treatment but not dyeing treatment, so that the metallic luster and three-dimensional sand effect of the sand surface can be well presented, and the conductivity of the shell base material is maintained due to that the nanoscale pores in the pre-oxidation layer are not sealed, so that the subsequent electrophoresis process is facilitated, and the implementation is simple.

[0027] In a possible implementation of the first aspect, the pre-oxidation layer includes 2 μm-10 μm in the thickness range along the direction perpendicular to the shell base material.

[0028] In the implementation, the thickness of the pre-oxidation layer can be made thinner to ensure good conductivity, and the preparation process of the pre-oxidation layer is shorter and faster, and a lower voltage can be used in the subsequent preparation of the electrophoretic layer.

[0029] In a possible implementation of the first aspect, the highlight surface is obtained through at least one of polishing, polishing and computer numerical control diamond knife cutting.

[0030] In the implementation, the implementation is simple.

[0031] In a possible implementation of the first aspect, the roughness of the highlight surface is less than or equal to 0.05 μm.

[0032] In the implementation, the smaller the roughness is, the smoother the outer surface of the highlight surface is, and the better the light reflection is, so that the highlight surface can have the effect of mirror high light highlight.

[0033] In a possible implementation of the first aspect, the material of the transparent layer includes at least silane salt, and the silane salt has amino, vinyl and epoxy groups.

[0034] In the implementation, the silicon atoms or other functional groups in the silane mixture can form hydrogen bonds with the surface of the aluminum alloy base material, so that the transparent layer is well combined with the shell base material, so that the transparent layer can not affect the display of the highlight effect of the highlight surface, and can protect the highlight surface while maintaining the highlight effect of the highlight surface.

[0035] In a possible implementation of the first aspect, the thickness of the transparent layer along the direction perpendicular to the shell base material ranges from 0.5 to 3 microns.

[0036] In the implementation, the transparent layer is thin, and the transmittance is greater than 90%, so that the highlight surface and / or the oxidation layer can not be blocked.

[0037] In a possible implementation of the first aspect, the material of the electrophoretic layer includes water-soluble anodic electrophoretic paint of an acrylic resin system.

[0038] In the implementation, the electrophoretic layer can reduce the impact on the highlight effect of the highlight surface located in the highlight area as much as possible, and is simple and easy to implement.

[0039] In a possible implementation of the first aspect, the thickness of the electrophoretic layer along the direction perpendicular to the shell base material ranges from 8 to 30 microns.

[0040] In the implementation, the thickness of the electrophoretic layer is appropriate, so that the gloss and protection performance of the electrophoretic layer are both good.

[0041] In a possible implementation of the first aspect, the pencil hardness of the electrophoretic layer ranges from 2H to 5H.

[0042] In the implementation, the electrophoretic layer is wear-resistant and scratch-resistant.

[0043] In a possible implementation of the first aspect, at least one of a slip aid, a color paste, a color-changing pearl powder and a fingerprint-resistant aid is added to the electrophoretic layer.

[0044] In the implementation, when the slip agent is added in the electrophoretic layer, the contact angle of the electrophoretic layer to water can be increased to 90° or above, and the electrophoretic layer feels very smooth; when the color paste is added in the electrophoretic layer, the color of the electrophoretic layer can be adjusted to any desired color, so that the differentiated appearance of the shell part can be realized; when the color-changing pearl powder is added in the electrophoretic layer, the shell part can have a shining effect; when the fingerprint-resistant agent is added in the electrophoretic layer, the fingerprint resistance of the shell part can be improved, and the appearance also has good fingerprint resistance effect. Thus, the delicacy and competitiveness of the electronic device are effectively improved.

[0045] In a possible implementation of the first aspect, the highlight area has at least one of a highlight surface, a highlight chamfer, a highlight mark, a highlight line, and a highlight decorative shape.

[0046] In the implementation, the highlight surface, the highlight chamfer, the highlight mark, the highlight line, and the highlight decorative shape can be realized.

[0047] In a second aspect, an electronic device is provided, which includes the shell part in the first aspect or any possible implementation of the first aspect.

[0048] Embodiments of the present application provide an electronic device, which has a more beautiful bright and matte same body effect on the appearance surface, and good user experience.

[0049] In a third aspect, a preparation method of a shell part is provided, which includes:

[0050] A shell base material is provided; the shell base material has at least a matte area and a highlight area.

[0051] An outer surface of the shell base material in the matte area and the highlight area is processed to form a sand surface.

[0052] The sand surface is processed to form an oxidation layer.

[0053] A part of the oxidation layer in the highlight area is processed to form a highlight surface.

[0054] A transparentization layer is formed on at least one side of the highlight surface away from the shell base material.

[0055] Embodiments of the present application provide a preparation method of a shell part, at least part of the outer surface of the shell base material is processed into a sand surface, then the sand surface is oxidized to form an oxidation layer covering the sand surface, so that the sand surface has a three-dimensional sand effect and a metallic luster, and part of the outer surface of the shell base material is made into a highlight surface, then the highlight surface is processed to form a transparentization layer covering the highlight surface, the transparentization layer can protect the highlight surface and keep the highlight effect, so that the shell part has a natural and smooth matte effect and a highlight effect, and the appearance is more beautiful and diversified.

[0056] In a third aspect, in a possible implementation, the processing the sand surface to form the oxidation layer comprises:

[0057] processing the sand surface to form a pre-oxidation layer; wherein the pre-oxidation layer is not dyed, and the outer surface of the pre-oxidation layer has a plurality of pores.

[0058] After the transparented layer is formed at least on the side of the highlight surface away from the shell base material, the preparation method further comprises.

[0059] forming an electrophoretic layer on the matte area and the highlight area; wherein the electrophoretic layer covers at least one of the transparented layer and the pre-oxidation layer, the electrophoretic layer is translucent, and the material of the transparented layer and / or the material of the electrophoretic layer fills the pores of the pre-oxidation layer.

[0060] In this implementation, at least part of the outer surface of the shell base material is first processed into a sand surface, then the sand surface is subjected to oxidation treatment and an oxidation layer covering the sand surface is formed, so that the sand surface has a three-dimensional sand effect and a metallic luster, and part of the outer surface of the shell base material is made into a highlight surface, then the highlight surface is processed and a transparented layer covering the highlight surface is formed, the transparented layer can protect the highlight surface and keep the highlight effect, and then the film layers are protected by the colored translucent electrophoretic layer, so that the shell part can present a natural and smooth matte effect and a highlight effect, and the appearance aesthetics and diversification are greatly improved.

[0061] The shell part and the electronic device provided in the embodiments of the present application are as follows: at least part of the outer surface of the shell base material is first processed into a sand surface, then the sand surface is subjected to oxidation treatment and an oxidation layer covering the sand surface is formed, so that the sand surface has a three-dimensional sand effect and a metallic luster, and part of the outer surface of the shell base material is made into a highlight surface, then the highlight surface is processed and a transparented layer covering the highlight surface is formed, the transparented layer can protect the highlight surface and keep the highlight effect, so that the shell part presents a natural and smooth matte effect and a highlight effect, and the appearance aesthetics and diversification are improved; and the shell part is used in an electronic device, so that the appearance aesthetics of the electronic device is greatly improved, the user experience is good, and only one oxidation treatment is needed when the shell part is prepared, so that the process is short, the cost is low, and the implementation is simple. BRIEF DESCRIPTION OF DRAWINGS

[0062] FIG. 1 is a structural schematic diagram of a notebook computer provided in the embodiments of the present application;

[0063] FIG. 2 is a structural schematic diagram of a shell cover, a keyboard and a first shell of the notebook computer in FIG. 1;

[0064] FIG. 3 is a structural schematic diagram of a second shell of the notebook computer in FIG. 1;

[0065] FIG. 4 is a structural schematic diagram of a first shell part provided in the embodiments of the present application;

[0066] Fig. 5 is a structural schematic diagram of a second shell provided by an embodiment of the present application;

[0067] Fig. 6 is a structural schematic diagram of a third shell provided by an embodiment of the present application;

[0068] Fig. 7 is a micro-morphology diagram of a sand surface of a shell provided by an embodiment of the present application;

[0069] Fig. 8 is a structural schematic diagram of a fourth shell provided by an embodiment of the present application;

[0070] Fig. 9 is a structural schematic diagram of a fifth shell provided by an embodiment of the present application;

[0071] Fig. 10 is a structural schematic diagram of a sixth shell provided by an embodiment of the present application;

[0072] Fig. 11 is a process flow diagram of a shell provided by an embodiment of the present application;

[0073] Fig. 12 is a process flow diagram of another shell provided by an embodiment of the present application.

[0074] Reference signs: 100-electronic device; 101-display screen; 102-outer cover; 103-main machine; 104-keyboard; 105-touch component; 106-shell; 107-first shell; 108-second shell; 109-first wall plate; 1081-heat dissipation vent; 1082-protruding pad; 01-shell; 1-shell base material; 2-sand surface; 3-high light surface; 4-oxidation layer; 41-pre-oxidation layer; 5-transparent chemical conversion layer; 6-electrophoretic layer; YG-matte area; GL-high light area; YGM-matte surface; CM1-high light chamfer; CM2-high light side surface. DETAILED DESCRIPTION

[0075] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in the text only means a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone.

[0076] Hereinafter, the terms "first" and "second" are only for description purposes, and cannot be understood as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more features, and in the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more, and "at least one" means one or more.

[0077] First, some of the terms in the embodiments of the present application are explained and described, so that those skilled in the art can better understand.

[0078] 1. Electrophoresis process

[0079] The electrophoresis process refers to placing an aluminum alloy shell and the like in an electrophoretic fluid (for example, electrophoretic paint and the like), and moving and depositing the electrophoretic fluid on the surface of the shell under the action of an applied electric field and the like.

[0080] The electrophoresis process can be specifically: taking a plurality of tanks respectively, and sequentially having lye, water, acid, water, electrophoretic paint (the tank can also apply an electric field), water and the like in each tank, and then placing an aluminum alloy shell and the like in each tank in turn, and respectively performing alkaline degreasing, water washing, pickling, water washing, adhering electrophoretic paint under the action of an electric field (the reaction temperature can be 27-31°C), water washing, dewatering, and baking and curing.

[0081] 2. Polishing

[0082] Polishing refers to modifying and processing the outer surface of an aluminum alloy shell and the like by using a polishing tool, abrasive particles or other polishing media.

[0083] 3. Sand blasting

[0084] Sand blasting refers to pressurized sand blasting by a shot blasting machine and hitting the surface of an aluminum alloy shell and the like, so that the surface has a certain roughness.

[0085] 4. Vickers hardness

[0086] Vickers hardness is a standard for indicating the hardness of a material, which refers to pressing a diamond right pyramid indenter with an included angle of 136° between opposite faces into the surface of a tested material under a specified load, keeping for a certain time, then removing the load, measuring the diagonal line length of the indentation, then calculating the indentation surface area, and finally calculating the average pressure on the indentation surface area as the Vickers hardness value of the tested material, which is denoted by the symbol HV.

[0087] 5. Computerized numerical control (CNC)

[0088] CNC refers to a way of using numerical control machining equipment to process the surface of a machined part.

[0089] 6. Pearlescent powder

[0090] Pearlescent powder is an optical effect pigment with certain metallic luster and sparkling effect.

[0091] The above is a brief introduction to the terms involved in the embodiments of the present application, which will not be described hereinafter.

[0092] Before the shell part provided by the embodiments of the present application is explained in detail, the application scenarios involved in the embodiments of the present application are introduced.

[0093] FIG. 1 is a schematic diagram of a scenario to which an embodiment of the present application is applied. Referring to FIG. 1, the scenario includes an electronic device 100. FIG. 1 exemplarily illustrates the electronic device 100 as a notebook computer, but it cannot be considered as a special limitation on the type and structure of the electronic device 100. Specifically, the notebook computer can be a common notebook computer, a gaming notebook computer, or the like.

[0094] As shown in FIG. 1, the notebook computer can include a display screen 101, a shell cover 102, a main machine 103, a keyboard 104, a touch component 105, and a shell 106.

[0095] Aluminum alloy is increasingly applied to shell part manufacturing as a base material due to its advantages such as light weight, softness, high strength, good corrosion resistance, good heat resistance, good electromagnetic shielding, good plasticity, and the like, and various shapes (for example, a shell part on the side of a notebook computer screen, a shell part of a tablet computer) can be processed by CNC.

[0096] Bright and matte homogeneity is a design process mainly applied to the appearance design of electronic devices. This process combines two different textures of brightness and matte, and through specific technical means, the outer surface of the electronic device presents two effects of brightness and matte at different positions, thereby forming a unique visual and tactile experience and attracting more attention from consumers.

[0097] Currently, when realizing the bright and matte homogeneity effect of a shell part made of aluminum alloy, one method is to first perform sanding treatment on the outer surface of the aluminum alloy to form a sand surface, then perform first anodic oxidation treatment on the sand surface (the purpose is to make the outer surface of the aluminum alloy have a matte effect), then perform high-brightness processing on part of the sand surface to form a local high-brightness area, and finally perform second anodic oxidation on the high-brightness area (the second anodic oxidation does not perform the dyeing and chemical polishing steps in the first anodic oxidation, and the purpose is to maintain the high-brightness effect of the high-brightness area), so as to form a more delicate bright and matte homogeneity appearance effect. The high-brightness area can include a high-brightness chamfer CM1 machined by an angular edge as shown in FIG. 1, a high-brightness logo machined by a plane as shown in FIG. 2, and the like.

[0098] It should be noted that the first anodic oxidation treatment includes steps of alkali washing, water washing, neutralization, water washing, chemical polishing, oxidation, dyeing, sealing, ash removal, and curing.

[0099] However, the traditional method has problems of long process and high cost when realizing the bright and matte homogeneity of a shell part made of aluminum alloy.

[0100] Based on the above, this application provides a housing with different areas on the outer surface of the housing substrate having a matte finish and a glossy finish. Meanwhile, an oxide layer covers the matte finish, which can give the matte finish a three-dimensional sand effect and gloss. In addition, a transparent layer covers at least the glossy finish, which can maintain the glossy effect of the glossy finish. This makes the matte and glossy textures of the housing very naturally connected, greatly improving the appearance quality of the housing and thus improving the appearance of the electronic device using the housing.

[0101] This application does not limit the specific type of electronic device. In some embodiments, the electronic device may include mobile phone, tablet, notebook, wearable device (e.g., smart bracelet, smartwatch, and headphones), laptop, handheld computer, ultra-mobile personal computer (UMPC), cellular phone, personal digital assistant (PDA), augmented reality (AR) / virtual reality (VR) device and other Internet of Things (IoT) devices, in-vehicle electronic device, and may also be a television, large screen, printer, projector, etc.

[0102] Figures 1 to 3 and the related figures below only schematically show some components of the laptop computer. The actual shape, size, position and structure of these components are not limited by Figures 1 to 3 and the figures below.

[0103] Please refer to Figures 1 and 2. The outer cover 102 is movably connected to the host 103. The display screen 101 is installed on the side of the outer cover 102 near the host 103. The keyboard 104 and the touch component 105 are both located on the host 103.

[0104] The display screen 101 can be used to display images, videos, etc. The display screen 101 can be any one of the following: liquid crystal display (LCD), organic light emitting diode (OLED) display, mini light emitting diode (Mini LED) display, micro light emitting diode (Micro LED) display, etc.

[0105] The keyboard 104 and the touch component 105 can be used to input instructions or data, etc.

[0106] The host 103 serves as the control center of the notebook computer and can be used to implement data storage, operation, control, signal conversion, etc. The host 103 is rotatably connected with the display screen 101, so that the notebook computer can be switched between the open state and the closed state. Specifically, as shown in FIG. 1, the notebook computer is in the open state, and the display screen 101 is opened at an angle relative to the host 103. The angle can be greater than 0° and less than 180°. When the notebook computer is in the closed state, the display screen 101 is closed on the surface of the host 103 on which the keyboard 104 and the touch component 105 are arranged.

[0107] In addition, as shown in FIG. 1, the host 103 is substantially rectangular and flat. In other embodiments, the shape of the host 103 can also be square, circular, or elliptical, etc., which is not limited here.

[0108] Please continue to refer to FIGS. 1-3, the host 103 includes a housing 106, the housing 106 includes a first housing 107 (also referred to as C shell) and a second housing 108 (also referred to as D shell) connected with the first housing 107, and a receiving cavity is formed between the first housing 107 and the second housing 108. The receiving cavity can be used to accommodate components such as circuit boards, fans, heat pipes, and heat dissipation fins. The above-mentioned keyboard 104 and touch component 105 are arranged on the first housing 107. Further, the first housing 107 can include a first wall plate 109, and the above-mentioned keyboard 104 and touch component 105 are arranged on the first wall plate 109. In addition, two chamfers 110 are marked on the corner positions of the host 103.

[0109] Please refer to FIG. 3 again, the surface of the second housing 108 away from the first housing 107 is provided with heat dissipation vents 1081 and raised pads 1082. In FIG. 3, the number of heat dissipation vents 1081 is ten, and the number of raised pads 1082 is four, of course, which is not limited here.

[0110] On the basis of the above, the notebook computer can further include other structures such as microphones, speakers, cameras, etc., which are subject to actual application.

[0111] Based on the above, the shell pieces provided by the embodiments of the present application can be used for the structures of the shell cover 102, the first housing 107, and the second housing 108 in FIGS. 1-3. The matt surface and the bright surface of these shell pieces are naturally connected, realizing the appearance effect of bright-matt same body and matt surface simulating anodic oxidation, greatly improving the quality of the shell, and further improving the appearance quality of the electronic equipment using the shell, and the user experience is good.

[0112] Please refer to Figs. 4-12 below for a detailed introduction of the shell 01 and the preparation method thereof provided by the embodiments of the present application.

[0113] First, please refer to Figs. 4-6, the present application provides a shell 01, which comprises:

[0114] The shell base material 1 has at least a matte area YG and a high-light area GL, the outer surface of the part of the shell base material 1 located in the matte area YG is a sand surface 2, and the outer surface of the part of the shell base material 1 located in the high-light area GL is a high-light surface 3.

[0115] The oxidation layer 4 is located in the matte area YG and covers the sand surface 2.

[0116] The transparent chemical layer 5 is located at least in the high-light area GL and covers at least the high-light surface 3.

[0117] In actual application, the above-mentioned shell base material 1 having at least a matte area YG and a high-light area GL means that the entire outer surface of the shell base material 1 is composed of the matte area YG and the high-light area GL; or, the entire outer surface of the shell base material 1 can have other areas in addition to the matte area YG and the high-light area GL, for example, the area for wire drawing, which is subject to actual application. On this basis, the sand surface 2 and the high-light surface 3 can be connected or not connected, which is not specifically limited here.

[0118] The above-mentioned shell base material 1 can include an aluminum alloy base material, etc. Of course, the shell base material 1 can also be aluminum, magnesium alloy, titanium alloy, etc., which is subject to actual application.

[0119] It should be noted that, in order to better show the thickness of each film layer, the present application makes a cross-sectional surface along the thickness direction of the shell 01, and from the perspective of the cross-section, the thickness of each film layer is obtained.

[0120] On the above basis, as an example, as shown in Fig. 4, the matte area YG includes the oxidation layer 4 and the transparent chemical layer 5 which are sequentially stacked along the thickness direction of the shell 01; the high-light area GL includes the transparent chemical layer 5.

[0121] As another example, as shown in Fig. 5, the matte area YG includes the oxidation layer 4; the high-light area GL includes the transparent chemical layer 5.

[0122] As yet another example, as shown in Fig. 6, the matte area YG includes the oxidation layer 4 and the transparent chemical layer 5 along the thickness direction of the shell 01, in the matte area YG, the oxidation layer 4 covers all the sand surface 2, and the transparent chemical layer 5 is arranged on the part of the surface away from the shell base material 1 on the side of the oxidation layer 4; the high-light area GL includes the transparent chemical layer 5.

[0123] In practical applications, the surface of the provided aluminum alloy substrate can be subjected to sand blasting and high gloss treatment respectively, so as to obtain the sand surface 2 located in the matte area YG and the high gloss surface 3 located in the high gloss area GL on the surface of the aluminum alloy substrate.

[0124] The material of the sand surface 2 can include sand pellets such as glass sand, zircon sand, iron sand, and diamond sand, etc., and the sand surface 2 can be formed on the outer surface of the shell substrate 1 by sand blasting or the like. Specifically, a high-pressure air gun can be used for sand blasting operation.

[0125] The particle size range of the sand pellets can include 130-220 mesh, and the particle size of the sand pellets can be 130 mesh, 150 mesh, 170 mesh, 190 mesh, 200 mesh, or 220 mesh, etc. When the sand pellets are finer (the larger the mesh number, the finer), the uniformity and texture of the sand effect that people can see and touch are better, and the cost is lower.

[0126] Figure 7 shows a micro-morphology diagram of the sand surface 2, which can be obtained by a metallographic microscope, 3D super-depth instrument, etc.

[0127] As shown in Figure 7, the surface morphology of the sand surface 2 is uneven, the sand surface 2 has strong and uniform grain feeling, and the sand surface 2 is matt.

[0128] In order to improve the above-mentioned problems of the sand surface 2, as shown in Figures 4-6, the present application can perform oxidation treatment on the outer surface of the side of the sand surface 2 away from the shell substrate 1, that is, form an oxidation layer 4 on the outer surface of the side of the sand surface 2 away from the shell substrate 1. The oxidation layer 4 can make the sand surface 2 have metallic luster and three-dimensional sand effect, and achieve the matte effect.

[0129] The oxidation layer 4 can be realized by an anodic oxidation process. Specifically, a plurality of tanks can be taken, and an alkali solution, water, an acid solution, and an oxidation solution, etc. are respectively contained in each tank. The aluminum alloy substrate with the sand surface 2 is sequentially placed in the tanks containing the alkali solution, water, acid solution, water, acid solution, oxidation solution, etc. The outer surface of the side of the sand surface 2 away from the shell substrate 1 is sequentially subjected to alkali washing, water washing (for example, 2 times of water washing), neutralization, water washing (for example, 2 times of water washing), chemical polishing, oxidation, dyeing, sealing, dust removal, and curing steps, to form the oxidation layer 4.

[0130] It should be noted that the tank containing the oxidation solution can also have an external electric field.

[0131] Specifically, the sand surface 2 can be subjected to alkali washing for 30-90s at 25-60℃ using an alkali solution such as sodium hydroxide (NaOH). The purpose of alkali washing is to degrease the sand surface 2, remove dirt and other stains on the sand surface 2, and clean the sand surface 2.

[0132] The concentration range of the aforementioned alkaline solution can be 30 g / L to 70 g / L.

[0133] A chemical polishing solution consisting of 85% phosphoric acid (H3PO4), 98% sulfuric acid (H2SO4), and chemical polishing additives can be used to chemically polish the alkaline-washed sandblasted surface 2 for 60-180 seconds at 75-85℃. The purpose of this chemical polishing is to improve the brightness of the sandblasted surface 2, giving it a metallic luster and a three-dimensional sandblasted effect.

[0134] The mass ratio of H3PO4 to H2SO4 is in the range of 4-6:1-2, at which point the chemical polishing solution has a better chemical polishing effect.

[0135] H2SO4 with a mass fraction of 98% and containing trivalent aluminum ions (Al) can be used. 3+ The acid-polished sand surface 2 is oxidized in an oxidizing solution at 15℃-25℃ for 20min-40min. This oxidation can form nanoscale pores, which can be filled by the subsequently prepared film layer, thereby improving the adhesion between the subsequently prepared film layer and the oxide layer 4.

[0136] The mass concentration range of H2SO4 can be 190 g / L-230 g / L, and Al 3+ The mass concentration range can be 0.1 g / L-15 g / L, the pH range of the oxidation solution can be 1-2, the voltage range during oxidation can be 13V-15V, and the current density range during oxidation can be 1.0 A / dm³. 2 -4A / dm 2 .

[0137] The dye (e.g., pigment paste) can be placed in a tank, and the oxidized structure can be immersed in the tank. At 25℃-40℃, the dye molecules can be slowly deposited and adsorbed into the nanoscale pores formed after oxidation treatment for 3min-7min.

[0138] A sealing agent can be used to seal the pores at 90℃-100℃ for 45min-60min.

[0139] The concentration range of the sealing agent can be 12g / L-15g / L.

[0140] The purpose of the above-mentioned ash removal is to remove impurities.

[0141] High-temperature baking can be used. The purpose of baking here is to dry the parts, thereby reducing or avoiding the adverse effects of moisture on the shell 01.

[0142] It should be noted that if the high-light surface 3 is formed first and then the oxidation layer 4 is formed, the luster of the high-light surface 3 can be damaged by the alkali and acid used in the process of forming the oxidation layer 4. Therefore, in order to maintain the high-light effect of the high-light surface 3, the oxidation layer 4 is formed first and then the high-light surface 3 is formed.

[0143] As shown in FIGS. 4-6, the thickness d4 of the oxidation layer 4 in the direction perpendicular to the shell substrate 1 can range from 2 μm to 10 μm. Typically, the thickness d4 can range from 3 μm to 5 μm, and for example, the thickness d4 can be 3 μm, 4 μm or 5 μm, etc. This makes the preparation process of the oxidation layer 4 shorter and faster.

[0144] The high-light surface 3 can be formed by polishing, CNC diamond cutter cutting and other processing methods, which are simple and easy to implement.

[0145] It should be understood that when at least one of the high-light logo, high-light line and high-light decorative shape needs to be made, it can be made on the large surface of the high-light area GL of the shell 01; or the high-light surface 3 of the present application can be distributed in the local area of the periphery of the shell 01, for example, high-light chamfer (such as round corner, bevel, etc.) and high-light side wall, etc. The specific determination can be made according to the actual needs.

[0146] The roughness (Ra) of the high-light surface 3 can be less than or equal to 0.05 μm, and for example, the Ra of the high-light surface 3 can be 0.01 μm, 0.02 μm, 0.03 μm, 0.04 μm or 0.05 μm, etc. The smaller the Ra, the lower the roughness, the smoother the outer surface of the high-light surface 3, and the better the reflection of light. Therefore, the high-light surface 3 can have a mirror high-light effect.

[0147] Suppose the high-light surface 3 is formed on the outer surface of the shell substrate 1 located in the high-light area GL first, and then the high-light surface 3 needs to be shielded before the sandblasted surface is formed on the outer surface of the shell substrate 1 located in the matte area YG. Although this can reduce or avoid damage to the high-light surface 3, the process is long, and problems such as oxidation may occur during production, resulting in bad effects.

[0148] Therefore, as one way, the embodiment of the present application first divides the matt area YG and the highlight area GL on the outer surface of the shell base material 1 in advance, and then uses a high-pressure air gun to spray sand pellets on the outer surface of the shell base material 1 located in the matt area YG and the highlight area GL. The sand pellets will impact the pores on the outer surface of the shell base material 1 located in the matt area YG and the highlight area GL, so that the outer surface of the shell base material 1 located in the matt area YG and the highlight area GL presents a concave-convex appearance and a sand effect like sand, that is, a sandblasted surface is formed. Then, the sandblasted surface is subjected to an anodizing treatment to form the oxide layer 4. Then, the outer surface of part of the oxide layer 4 is processed to form the highlight surface 3 located in the highlight area GL, and the remaining untreated part forms the sand surface 2 located in the matt area YG.

[0149] As another way, the embodiment of the present application first divides the matt area YG and the highlight area GL on the outer surface of the shell base material 1 in advance, and then uses a high-pressure air gun to spray sand pellets on the outer surface of the shell base material 1 located in the matt area YG. The sand pellets will impact the pores on the outer surface of the shell base material 1 located in the matt area YG, so that the outer surface of the shell base material 1 located in the matt area YG presents a concave-convex appearance and a sand effect like sand, that is, a sandblasted surface is formed. Then, only the sandblasted surface is subjected to an anodizing treatment to form the oxide layer 4. Then, only the outer surface of the shell base material 1 located in the highlight area GL is processed to form the highlight surface 3.

[0150] It should be noted that in the above method, when the sand pellets are sprayed on the outer surface of the shell base material 1 by using a high-pressure air gun to form pores, some sand pellets rebound out, and some sand pellets remain in the pores. Therefore, the sand pellets remaining in the pores need to be removed to expose the pores, and then subsequent operations are performed.

[0151] In actual application, since the highlight surface 3 is a mirror surface, in order not to affect the display of the highlight effect of the highlight surface 3, the highlight surface 3 is protected while maintaining the highlight effect of the highlight surface 3. As shown in FIGS. 4 to 6, the embodiment of the present application forms a transparent formed layer 5 on at least the outer surface of the highlight surface 3 away from the shell base material 1.

[0152] The transparent formed layer 5 described above can be formed by using a silane mixed solution. The silane mixed solution can include silane salt (effective ingredient), ethanol (C2H5OH), and water (H2O), etc., so that the silane mixed solution has amino groups, vinyl groups, and epoxy groups, etc. Therefore, the silicon (Si) atoms or other functional groups in the silane mixed solution can form hydrogen bonds with the surface of the aluminum alloy base material, so that the transparent formed layer 5 is well combined with the shell base material 1.

[0153] Specifically, the silane salt can be a silane coupling agent, such as KH-550, 1,2-diethoxysilyl ethane (BTSE), etc. The volume percentage of the silane coupling agent in the silane mixture can range from 5% to 10%, and exemplarily, the volume percentage of the silane coupling agent in the silane mixture can be 5%, 6%, 7%, 8%, 9%, or 10%, etc. Thus, the transparent conversion layer 5 formed can make the high-light surface 3 have better transparency and metallic luster.

[0154] The preparation process of the transparent conversion layer 5 includes: after the oxide layer 4 located in the matte area YG and the high-light surface 3 located in the high-light area GL are washed with water (the purpose is to remove grease), soaked in the silane mixture for 1 min to 3 min, washed with water again, and baked at 80°C to 120°C for 5 min to 20 min, a transparent film, i.e., the transparent conversion layer 5, is formed by curing; or, after the high-light surface 3 located in the high-light area GL is washed with water, soaked in the silane mixture for 1 min to 3 min, washed with water again, and baked at 80°C to 120°C for 5 min to 20 min, a transparent film, i.e., the transparent conversion layer 5, is formed by curing.

[0155] Referring to FIGS. 4 and 6 again, the thickness d5 of the transparent conversion layer 5 in the direction perpendicular to the shell substrate 1 can range from 0.5 μm to 3 μm, and exemplarily, d5 can be 0.5 μm, 1 μm, 2 μm, or 3 μm, etc. In this way, the transparent conversion layer 5 is thin, and the transmittance is greater than 90%, so that the high-light surface 3 and / or the oxide layer 4 in FIGS. 4 and 6 can not be blocked.

[0156] It should be noted that the thickness of the transparent conversion layer 5 in FIG. 5 in the direction perpendicular to the shell substrate 1 is the same as d4, and therefore d5 is not shown in FIG. 5.

[0157] Since some operations in the film formation process can affect the effect of the high-light surface 3, for example, the high-light surface 3 is oxidized by oxygen (O2) in the air, etc., resulting in problems such as fogging and yellowing, and therefore, at least the transparent conversion layer 5 is formed on the high-light surface 3, which can reduce or avoid oxidation of the high-light surface 3, so that the high-light effect is maintained. In addition, even if the transparent conversion layer 5 is also provided on the outer surface of the oxide layer 4, the transparent conversion layer 5 is transparent and thin, and will not affect the sand effect of the oxide layer 4 or even the sand surface 2.

[0158] The shell and the manufacturing method thereof provided by the embodiments of the present application first treat at least part of the outer surface of the shell base material into a sand surface, then perform oxidation treatment on the sand surface and form an oxidation layer covering the sand surface, so that the sand surface has a three-dimensional sand effect and a metallic luster, and part of the outer surface of the shell base material is made into a high-brightness surface, then the high-brightness surface is treated and a transparent formed layer covering the high-brightness surface is formed, the transparent formed layer can protect the high-brightness surface and make it maintain a high-brightness effect, so that the shell presents a natural matt effect and a high-brightness effect, the appearance is beautiful and diversified, and the user experience is good.

[0159] When the shell provided by the embodiments of the present application is used in a consumer electronic device, the appearance of the electronic device can be greatly improved, and only one oxidation treatment is needed when the shell is manufactured, so the process is short, the cost is low, and it is simple and easy to implement.

[0160] Please refer to FIGS. 8 to 12, the shell 01 and the manufacturing method thereof provided by the embodiments of the present application.

[0161] The sand surface 2, the high-brightness surface 3 and the transparent formed layer 5 of the shell 01 provided by FIGS. 8 to 12 are the same as those of the shell 01 provided by FIGS. 4 to 6.

[0162] The difference is that the oxidation layer 4 in FIGS. 8 to 12 is a pre-oxidation layer 41 formed by a pre-oxidation process, and on this basis, the shell 01 further includes an electrophoretic layer 6.

[0163] The pre-oxidation layer 41 is located in the matt area YG and covers the sand surface 2, the pre-oxidation layer 41 has a plurality of pores, and the pre-oxidation process is different from the anodic oxidation process in that there is no dyeing and sealing step in the anodic oxidation process, and the remaining steps are the same as those in the anodic oxidation process.

[0164] The electrophoretic layer 6 is located in the matt area YG and the high-brightness area GL, and the electrophoretic layer 6 is in a translucent state.

[0165] On the basis, as an example, as shown in FIG. 8, the matt area YG includes the pre-oxidation layer 41, the transparent formed layer 5 and the electrophoretic layer 6 which are sequentially stacked in the thickness direction of the shell 01, and the material of the transparent formed layer 5 fills the pores of the pre-oxidation layer 41; the high-brightness area GL includes the transparent formed layer 5 and the electrophoretic layer 6 which are sequentially stacked in the thickness direction of the shell 01.

[0166] As another example, as shown in FIG. 9, the matt area YG includes the pre-oxidation layer 41 and the electrophoretic layer 6 which are sequentially stacked in the thickness direction of the shell 01, and the material of the electrophoretic layer 6 fills the pores of the pre-oxidation layer 41; the high-brightness area GL includes the transparent formed layer 5 and the electrophoretic layer 6 which are sequentially stacked in the thickness direction of the shell 01.

[0167] Due to the compactness and smoothness of the highlight surface 3 of the highlight area GL, the adhesion of the material of the electrophoretic layer 6 to the highlight surface 3 can be improved by arranging the transparent conversion layer 5 between the highlight surface 3 and the electrophoretic layer 6, thereby improving the bonding force between the electrophoretic layer 6 and the shell base material 1.

[0168] As another example, as shown in FIG. 10, the matte area YG includes, along the thickness direction of the shell 01, a pre-oxidation layer 41, a transparent conversion layer 5, and an electrophoretic layer 6. In the matte area YG, the pre-oxidation layer 41 covers the entire sand surface 2, the transparent conversion layer 5 is arranged on part of the surface of the pre-oxidation layer 41 away from the shell base material 1, and the electrophoretic layer 6 covers the entire pre-oxidation layer 41 and the transparent conversion layer 5. The material of the transparent conversion layer 5 fills part of the pores in the pre-oxidation layer 41, and the material of the electrophoretic layer 6 fills part of the pores in the pre-oxidation layer 41. The highlight area GL includes, along the thickness direction of the shell 01, the transparent conversion layer 5 and the electrophoretic layer 6 arranged in sequence.

[0169] In actual applications, due to the unevenness, strong graininess, and lack of luster of the sand surface 2, the outer surface of the sand surface 2 away from the shell base material 1 is sequentially subjected to the steps of alkali washing, chemical polishing, oxidation, and curing, i.e., the pre-oxidation layer 41 is formed on the outer surface of the sand surface 2. The pre-oxidation layer 41 is subjected to oxidation treatment but not dyeing treatment, and can well present the bright and three-dimensional sand effect of the metallic luster of the sand surface 2. At the same time, since the nano-level pores are not subjected to sealing treatment in the process of preparing the pre-oxidation layer 41, the conductivity of the shell base material 1 is maintained, which is conducive to subsequent electrophoresis process.

[0170] It should be noted that if the highlight surface 3 is formed first and then the pre-oxidation layer 41 is formed, the acid and alkali used in the process of preparing the pre-oxidation layer 41 may damage the luster of the highlight surface 3. Therefore, the pre-oxidation layer 41 is formed first and then the highlight surface 3 is formed, so that the highlight surface 3 can still maintain good highlight effect before the electrophoretic layer 6 is prepared.

[0171] As shown in FIGS. 8-10, the pre-oxidation layer 41 can have a thickness d41 in the range of 2-10 μm in the direction perpendicular to the shell base material 1. Typically, the range of d41 can be 3-5 μm, and exemplarily, d41 can be 3 μm, 4 μm, or 5 μm, etc. In this way, the pre-oxidation layer 41 can have a relatively thin thickness, ensuring good conductivity, and the preparation process of the pre-oxidation layer 41 is shorter and faster, and in addition, a lower voltage can be used in the subsequent preparation of the electrophoretic layer 6.

[0172] As a manner, the present application embodiment first divides the matt area YG and the high-light area GL on the outer surface of the shell base material 1 in advance, and can use the high-pressure air gun to spray the sand pills on the outer surface of the shell base material 1 located in the matt area YG and the high-light area GL. The sand pills will impact the pores on the outer surface of the shell base material 1 located in the matt area YG and the high-light area GL, so that the outer surface of the shell base material 1 located in the matt area YG and the high-light area GL presents the uneven topography and the sand effect as the sand, that is, the sandblasted surface is formed. Then, the sandblasted surface is sequentially subjected to the alkali washing, the chemical polishing, the oxidation and the curing treatment, so that the pre-oxidation layer 41 is formed. Then, the outer surface of part of the pre-oxidation layer 41 is processed to form the high-light surface 3 located in the high-light area GL, and the remaining untreated part forms the sand surface 2 located in the matt area YG.

[0173] As another manner, the present application embodiment first divides the matt area YG and the high-light area GL on the outer surface of the shell base material 1 in advance, and can use the high-pressure air gun to spray the sand pills on the outer surface of the shell base material 1 located in the matt area YG. The sand pills will impact the pores on the outer surface of the shell base material 1 located in the matt area YG, so that the outer surface of the shell base material 1 located in the matt area YG presents the uneven topography and the sand effect as the sand, that is, the sandblasted surface is formed. Then, only the sandblasted surface is subjected to the alkali washing, the chemical polishing, the oxidation and the curing treatment, so that the pre-oxidation layer 41 is formed. Then, only the outer surface of the shell base material 1 located in the high-light area GL is processed to form the high-light surface 3.

[0174] In actual application, since the high-light surface 3 presents the mirror surface, if the electrophoretic layer 6 is directly formed on the surface thereof, the adhesion of the electrophoretic paint on the high-light surface 3 is not good, and the electrophoretic layer 6 cannot firmly grasp the high-light surface 3. In order to facilitate the subsequent formation of the electrophoretic layer 6 and improve the adhesion between the electrophoretic layer 6 and the shell base material 1, and not affect the display of the high-light effect of the high-light surface 3, as shown in FIGS. 8 to 10, the present application embodiment forms the transparent cured layer 5 on the outer surface of the high-light surface 3 away from the shell base material 1, so that the adhesion between the electrophoretic layer 6 and the transparent cured layer 5 can be improved, and the combination between the electrophoretic layer 6 and the shell base material 1 can be further improved.

[0175] It should be noted that the transparent cured layer 5 is not completely dense, and the outer surface thereof still has some cracks or micropores, so that the transparent cured layer 5 does not affect the conductivity of the shell base material 1, the shell base material 1 still has the conductivity, and the subsequent electrophoresis process is not affected.

[0176] Meanwhile, the micro-morphology of the outer surface of the transparent cured layer 5 is not completely flat, but slightly uneven, so that the electrophoretic layer 6 can be well adhered to the outer surface of the transparent cured layer 5, and the adhesion between the two can be enhanced.

[0177] In practical applications, the semi-transparent state of the electrophoretic layer 6 means that the electrophoretic layer 6 can reduce the impact on the highlight effect of the highlight surface 3 located in the highlight area GL as much as possible, and the electrophoretic layer 6 can also display colors by adding additives to achieve a semi-transparent effect.

[0178] The material of the electrophoretic layer 6 described above can include an electrophoretic paint, which can include a water-soluble anodic electrophoretic paint of an acrylic resin system, and the water-soluble anodic electrophoretic paint of the acrylic resin system itself is transparent.

[0179] Specifically, the water-soluble anodic electrophoretic paint of the acrylic resin system can include an acrylic resin, isopropyl alcohol, an organic acid neutralizer, a curing agent, a color paste, and a solvent (for example, water), etc. Among them, the acrylic resin can include methacrylic acid (MAA) and the like.

[0180] Among them, the volume percentage of MAA can range from 10% to 20%, and exemplarily, the volume percentage of MAA can be 10%, 12%, 14%, 16%, 18%, or 20%, etc.

[0181] The volume percentage of isopropyl alcohol can range from 2% to 5%, and exemplarily, the volume percentage of isopropyl alcohol can be 2%, 3%, 4%, or 5%, etc.

[0182] Therefore, the electrophoretic layer 6 with good corrosion and decoration effects, good appearance quality (in line with appearance A standard), smooth surface, and few or even no pores, bubbles, or pinholes can be prepared, thereby meeting the needs of consumer electronic devices.

[0183] The preparation process of the electrophoretic layer 6 described above can include: depositing the electrophoretic paint on the outer surface of the transparentized layer 5 under the action of an electric field, and then baking at 120°C-180°C for 20min-40min to form a film, thereby obtaining the electrophoretic layer 6; or depositing the electrophoretic paint on the outer surface of the transparentized layer 5 and the pre-oxidized layer 41 under the action of an electric field, and then baking at 120°C-180°C for 20min-40min to form a film, thereby obtaining the electrophoretic layer 6.

[0184] As shown in FIGS. 8-10, the thickness d6 of the electrophoretic layer 6 in the direction perpendicular to the shell base material 1 can range from 8μm to 30μm. Notably, the range of d6 can be selected to range from 10μm to 15μm, and exemplarily, d6 can be 10μm, 11μm, 12μm, 13μm, 14μm, or 15μm, etc. Therefore, the electrophoretic layer 6 is not too thick, and the thickness is appropriate, so that the gloss and protection performance of the electrophoretic layer 6 can be good.

[0185] The pencil hardness of the electrophoretic layer 6 can range from 2H to 5H. For example, the pencil hardness of the electrophoretic layer 6 can be 2H, 3H, 4H or 5H, etc. Thus, the electrophoretic layer 6 is resistant to wear and scratch.

[0186] On the basis of the above, in order to make the electrophoretic layer 6 have further various effects, various different substances can be added to the electrophoretic paint to achieve various effects.

[0187] Example 1. A slip aid, which is a hydrophobic agent, can be added to the electrophoretic paint to increase the contact angle of the electrophoretic layer 6 to water to more than 90° and make the electrophoretic layer 6 feel very smooth to the touch.

[0188] Example 2. A dye (i.e. color paste) can be added to the electrophoretic paint, which can be any color such as blue, purple and pink, etc. Since the electrophoretic paint itself is colorless, the color of the electrophoretic layer 6 can be adjusted to any desired color by adding the color paste, so that the shell piece 01 can achieve a differentiated appearance, effectively improving the delicacy and competitiveness of the electronic device.

[0189] Example 3. Color-changing pearl powder can be added to the electrophoretic paint, so that the shell piece 01 has a shiny effect, effectively improving the delicacy and competitiveness of the electronic device.

[0190] Example 4. A fingerprint-resistant aid can be added to the electrophoretic paint, so that the anti-fingerprint performance of the shell piece 01 is improved, the anti-fingerprint effect is good, the appearance is also good, and the user experience is good.

[0191] Thus, the colored translucent electrophoretic layer 6 can be formed on the outer surface of the shell piece 01, which can further improve the hardness, wear resistance, hydrophobicity, anti-fingerprint property and slipperiness of the shell piece 01, and can make the shell piece 01 have various colors, thereby enriching the appearance of the product.

[0192] The shell piece provided by the embodiment of the present application has the following advantages. The at least part of the outer surface of the shell base material is first treated to have a sand surface, and then the sand surface is subjected to oxidation treatment and an oxidation layer covering the sand surface is formed, so that the sand surface has a three-dimensional sand effect and a metallic luster. The part of the outer surface of the shell base material is made into a high-gloss surface, and then the high-gloss surface is subjected to treatment and a transparent cured layer covering the high-gloss surface is formed, so that the transparent cured layer can protect the high-gloss surface and make it maintain the high-gloss effect. The shell piece is further protected by the colored translucent electrophoretic layer, so that the shell piece can have a natural and smooth matte effect and a high-gloss effect, and the appearance is more beautiful and diversified, and the user experience is good.

[0193] When the shell part of the embodiment of the present application is used in a consumer electronic device, the appearance of the electronic device can be greatly improved, and only one oxidation treatment is needed when the shell part is prepared, which is short in process, low in cost, and simple and easy to implement.

[0194] Optionally, as one possible way, Figure 11 shows a preparation process flow chart of a shell part with a high-brightness chamfer CM1.

[0195] As shown in Figure 11a, an aluminum alloy is provided as a shell base material 1.

[0196] As shown in Figure 11b, a high-pressure air gun is used to spray glass sand with a particle size of 130 mesh on the outer surface of the aluminum alloy to form a sand surface 2.

[0197] As shown in Figure 11c, the sand surface 2 is sequentially washed away from the outer surface of the aluminum alloy in 30 g / L NaOH at 25°C for about 30 s, etched in 85% H3PO4, 98% H2SO4, etching aid, and 75°C for about 60 s, and then oxidized in an oxidizing solution of 98% H2SO4 (mass concentration of 190 g / L) and Al 3+ (mass concentration of 0.1 g / L) at 15°C, 13V voltage, and 1.0 A / dm 2 current density for about 20 min, and then dried to form a pre-oxidation layer 41 with a thickness of 5 μm.

[0198] As shown in Figure 11d, the pre-oxidation layer 41 corresponding to the bevel angle of the aluminum alloy is polished to form a high-brightness chamfer CM1 with Ra of 0.04 μm. At this time, the sand surface 2 and the pre-oxidation layer 41 except the high-brightness chamfer CM1 form a matte surface YGM.

[0199] As shown in Figure 11e, the high-brightness chamfer CM1 and the matte surface YGM are immersed in KH-550 (volume percentage of KH-550 is 5%), C2H5OH, and H2O for about 1 min, washed with water, and then baked at 80°C for about 5 min to form a transparent conversion layer 5 with a thickness of 0.5 μm.

[0200] Specifically, the transparent conversion layer 5 can be formed on the side of the pre-oxidation layer 41 and the high-brightness chamfer CM1 away from the aluminum alloy, respectively, at this time the material of the transparent conversion layer 5 fills the pores of the pre-oxidation layer 41; or the transparent conversion layer 5 can be formed only on the side of the high-brightness chamfer CM1 away from the aluminum alloy; or the transparent conversion layer 5 can be formed on the part of the outer surface of the side of the pre-oxidation layer 41 away from the aluminum alloy and the side of the high-brightness chamfer CM1 away from the aluminum alloy, respectively, at this time the material of the transparent conversion layer 5 fills part of the pores of the pre-oxidation layer 41.

[0201] As shown in Fig. 11, f, under the action of an electric field, the electrophoretic paint composed of MAA (10% by volume), isopropyl alcohol (2% by volume), an organic acid neutralizer, a curing agent, a color paste, and H2O is deposited on the outer surface of the aforementioned film layer, and baked at 120℃ for about 20 min to form an electrophoretic layer 6 with a thickness of 10 μm and a pencil hardness of 2H.

[0202] Specifically, the electrophoretic layer 6 can be formed on the side of the transparent anodized layer 5 away from the shell base material 1; or the electrophoretic layer 6 can be formed on the side of the pre-oxidized layer 41 and the transparent anodized layer 5 away from the shell base material 1, in which case the material of the electrophoretic layer 6 can fill the pores of the pre-oxidized layer 41 or the material of the electrophoretic layer 6 and the transparent anodized layer 5 can fill the pores of the pre-oxidized layer 41.

[0203] The shell provided by the embodiment of the present application has the following advantages: the shell has a bright and matte appearance and texture; the method can reduce material turnover and shorten the process, and can achieve cost benefits; and the method is simple and easy to implement.

[0204] Optionally, as an implementable manner, Fig. 12 shows a preparation process flowchart of a shell with a high-brightness side CM2.

[0205] As shown in Fig. 12, a is provided, an aluminum alloy is provided as a shell base material 1.

[0206] As shown in Fig. 12, b is provided, a high-pressure air gun is used to spray zirconium sand with a particle size of 220 μm on the outer surface of the aluminum alloy to form a sand surface 2.

[0207] As shown in Fig. 12, c is provided, the sand surface 2 away from the outer surface of the aluminum alloy is sequentially washed in 70 g / L NaOH at 60℃ for about 90 s, etched in 85% by mass H3PO4, 98% by mass H2SO4, etching aids, and 85℃ for about 180 s, and oxidized in 98% by mass H2SO4 (230 g / L in mass concentration) and an oxidizing solution with Al 3+ (15 g / L in mass concentration) at 25℃, 15V voltage, and 4 A / dm 2 2 current density for about 40 min, and dried to form a pre-oxidized layer 41 with a thickness of 4 μm.

[0208] As shown in Fig. 12d, the side surface of the aluminum alloy corresponding to the pre-oxidized layer 41 is cut using a CNC diamond cutter to form a high-gloss side surface CM2 with Ra of 0.05 μm, at this time, the sand surface 2 and the pre-oxidized layer 41 except the high-gloss side surface CM2 form a matte surface YGM.

[0209] As shown in Fig. 12e, the high-gloss side surface CM2 and the matte surface YGM are immersed in BTSE (10% of the volume percentage of BTSE), C2H5OH and H2O for 3 min, and after water washing, baked at 120℃ for about 20 min to form a transparent conversion layer 5 with a thickness of 3 μm.

[0210] Specifically, the transparent conversion layer 5 can be formed on the side of the pre-oxidized layer 41 and the high-gloss side surface CM2 away from the aluminum alloy, at this time, the material of the transparent conversion layer 5 fills the pores of the pre-oxidized layer 41; or the transparent conversion layer 5 can be formed only on the side of the high-gloss side surface CM2 away from the aluminum alloy; or the transparent conversion layer 5 can be formed on the part of the outer surface of the pre-oxidized layer 41 and the side of the high-gloss side surface CM2 away from the aluminum alloy, at this time, the material of the transparent conversion layer 5 fills part of the pores of the pre-oxidized layer 41.

[0211] As shown in Fig. 12f, under the action of an electric field, an electrophoretic paint composed of MAA (20% of the volume percentage of MAA), isopropyl alcohol (5% of the volume percentage of isopropyl alcohol), an organic acid neutralizer, a curing agent, a color paste and H2O is deposited on the outer surface of the aforementioned film layer, and baked at 180℃ for about 40 min to form an electrophoretic layer 6 with a thickness of 15 μm and a pencil hardness of 5H.

[0212] Specifically, the electrophoretic layer 6 can be formed on the side of the transparent conversion layer 5 away from the shell base material 1; or the electrophoretic layer 6 can be formed on the side of the pre-oxidized layer 41 and the transparent conversion layer 5 away from the shell base material 1, at this time, the material of the electrophoretic layer 6 can fill the pores of the pre-oxidized layer 41 or the materials of the electrophoretic layer 6 and the transparent conversion layer 5 can fill the pores of the pre-oxidized layer 41.

[0213] The embodiment of the present application provides a preparation method of a shell piece. First, the appearance surface of the aluminum alloy is entirely sandblasted, and the sandblasted surface is pre-oxidized to form a sandblasted surface with uniform and consistent surface state. The sandblasted surface can present a three-dimensional sand effect and a metallic luster, and the micropores formed by pre-oxidization can improve the bonding force between the subsequent film layer and the aluminum alloy. Then, the side surface of the aluminum alloy is high-gloss processed to form a high-gloss side surface. Then, the high-gloss side surface is transparently converted to maintain the high-gloss effect of the high-gloss side surface and not affect the sand effect. Finally, electrophoresis is performed, so that the finally formed shell piece has a bright and dull appearance effect and texture. In addition, the method can reduce material turnover and process, and can realize cost benefit and is simple and easy to implement.

[0214] The above only introduces the content related to the invention points, and the remaining content can be obtained by referring to the related art, which will not be described in detail here.

[0215] It should be understood that the above is only to help those skilled in the art to better understand the embodiments of the present application, and is not intended to limit the scope of the embodiments of the present application. Those skilled in the art can obviously make various equivalent modifications or changes according to the above examples given. Or the combination of any two or any more embodiments. Such modifications, changes or combinations also fall within the scope of the embodiments of the present application.

[0216] It should also be understood that the above description of the embodiments of the present application focuses on the differences between the various embodiments, and the same or similar parts not mentioned can be referred to each other, and for the sake of brevity, will not be repeated here.

[0217] It should also be understood that the division of the ways, cases, categories and embodiments in the embodiments of the present application is only for the convenience of description, and should not be considered as a special limitation. The features in various ways, categories, cases and embodiments can be combined without contradiction.

[0218] It should also be understood that in various embodiments of the present application, the terms and / or descriptions of different embodiments are consistent and can be referred to each other if there is no special description and logical conflict. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0219] Finally, it should be noted that the above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any change or replacement within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A shell member, characterized by, The shell base material has at least a matte area and a highlight area, the outer surface of the shell base material at the matte area is sand surface, and the outer surface of the shell base material at the highlight area is highlight surface. An oxidation layer is arranged at the matte area and covers the sand surface. A transparent chemical layer is arranged at least at the highlight area and covers the highlight surface. The oxidation layer is a pre-oxidation layer, the pre-oxidation layer is not dyed, and the outer surface of the pre-oxidation layer has a plurality of pores.

2. The shell of claim 1, wherein The shell further comprises an electrophoretic layer arranged at the matte area and the highlight area, and the electrophoretic layer covers at least one of the transparent chemical layer and the pre-oxidation layer.

3. The shell of claim 2, wherein In a direction perpendicular to the thickness of the shell, the matte area comprises the oxidation layer and the transparent chemical layer arranged in sequence on the sand surface, and the highlight area comprises the transparent chemical layer.

4. The shell of claim 1, wherein The matte area comprises the oxidation layer, and the highlight area comprises the transparent chemical layer.

5. The shell of claim 1, wherein In a direction perpendicular to the thickness of the shell, the matte area comprises the oxidation layer and the transparent chemical layer, and the transparent chemical layer is arranged on at least part of the outer surface of the oxidation layer away from the shell base material.

6. The shell of claim 1, wherein The highlight area comprises the transparent chemical layer. In a direction perpendicular to the thickness of the shell, the matte area comprises the pre-oxidation layer, the transparent chemical layer, and the electrophoretic layer arranged in sequence on the sand surface, and the material of the transparent chemical layer fills the pores of the pre-oxidation layer.

7. The shell of claim 3, wherein The highlight area comprises the transparent chemical layer and the electrophoretic layer arranged in sequence on the highlight surface. In a direction perpendicular to the thickness of the shell, the matte area comprises the pre-oxidation layer and the electrophoretic layer arranged in sequence on the sand surface, and the material of the electrophoretic layer fills the pores of the pre-oxidation layer.

8. The shell of claim 3, wherein The highlight area comprises the transparent chemical layer and the electrophoretic layer arranged in sequence on the highlight surface. In a direction perpendicular to the thickness of the shell, the matte area comprises the pre-oxidation layer, the transparent chemical layer, and the electrophoretic layer, the transparent chemical layer is arranged between the pre-oxidation layer and the electrophoretic layer and covers part of the outer surface of the pre-oxidation layer, the electrophoretic layer covers the remaining part of the outer surface of the pre-oxidation layer and the transparent chemical layer, and the material of the transparent chemical layer and the material of the electrophoretic layer fill the pores of the pre-oxidation layer.

9. The shell of claim 3, wherein The highlight area comprises the transparent chemical layer and the electrophoretic layer arranged in sequence on the highlight surface. The pre-oxidation layer is obtained through alkali washing, chemical polishing, oxidation, and curing treatment.

10. The shell of any one of claims 2, 3, 7-9, wherein, The thickness of the pre-oxidation layer in a direction perpendicular to the shell base material ranges from 2 μm to 10 μm.

11. The shell of any one of claims 2, 3, 7-10, wherein, The highlight surface is obtained through at least one of polishing, polishing, and computer numerical control diamond cutter cutting.

12. The shell of any one of claims 1 to 11, wherein, The roughness of the highlight surface is less than or equal to 0.05 μm.

13. The shell of any one of claims 1 to 12, wherein, The material of the transparent chemical layer at least comprises a silane salt having an amino group, a vinyl group, and an epoxy group.

14. The shell of any one of claims 1 to 13, wherein, The thickness of the transparent chemical layer in a direction perpendicular to the shell base material ranges from 0.5 μm to 3 μm.

15. The shell of any one of claims 1 to 14, wherein, The material of the electrophoretic layer comprises a water-soluble anodic electrophoretic paint of an acrylic resin system.

16. The shell of any one of claims 3, 7-15, wherein, ​ 17. The shell of any one of claims 1 to 16, wherein, The thickness of the electrophoretic layer in a direction perpendicular to the shell base material ranges from 8 μm to 30 μm.

18. The shell of any one of claims 1 to 17, wherein, The pencil hardness of the electrophoretic layer ranges from 2H to 5H.

19. The shell of any one of claims 1 to 18, wherein, The electrophoretic layer is added with at least one of a slip agent, a color paste, a color-changing pearlescent powder, and a fingerprint-resistant agent.

20. The shell of any one of claims 1 to 19, wherein, The highlight area has at least one of a highlight surface, a highlight chamfer, a highlight mark, a highlight line, and a highlight decorative shape.

21. An electronic device, comprising: The shell as claimed in any one of claims 1 to 20.

22. A method of producing a shell member, characterized by, The shell as claimed in any one of claims 1 to 20. A shell base material is provided; wherein the shell base material has at least a matte area and a highlight area; An outer surface of the shell base material at the matte area and the highlight area is treated to form a sand surface; The sand surface is treated to form an oxidation layer; A portion of the oxidation layer at the highlight area is treated to form a highlight surface; A transparentized formed layer is formed at least on a side of the highlight surface away from the shell base material.

23. The method of claim 22, wherein the shell is formed by injection molding. The treatment of the sand surface to form an oxidation layer comprises: The sand surface is treated to form a pre-oxidation layer; wherein the pre-oxidation layer is not dyed, and an outer surface of the pre-oxidation layer has a plurality of pores; After the formation of the transparentized formed layer at least on a side of the highlight surface away from the shell base material, the preparation method further comprises: An electrophoretic layer is formed at the matte area and the highlight area; wherein the electrophoretic layer covers at least one of the transparentized formed layer and the pre-oxidation layer, the electrophoretic layer is translucent, and a material of the transparentized formed layer and / or a material of the electrophoretic layer fills the pores of the pre-oxidation layer.

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