WO2018166063A1 - 一种终端外壳及终端 - Google Patents

一种终端外壳及终端 Download PDF

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Publication number
WO2018166063A1
WO2018166063A1 PCT/CN2017/085131 CN2017085131W WO2018166063A1 WO 2018166063 A1 WO2018166063 A1 WO 2018166063A1 CN 2017085131 W CN2017085131 W CN 2017085131W WO 2018166063 A1 WO2018166063 A1 WO 2018166063A1
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WIPO (PCT)
Prior art keywords
layer
stainless steel
terminal
terminal housing
aluminum
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PCT/CN2017/085131
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English (en)
French (fr)
Inventor
顾虚谷
黄强
裴广日
花塚暁
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201780000601.4A priority Critical patent/CN107278385B/zh
Priority to JP2019550606A priority patent/JP2020515061A/ja
Priority to KR1020197029612A priority patent/KR102392479B1/ko
Publication of WO2018166063A1 publication Critical patent/WO2018166063A1/zh

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/0086—Casings, cabinets or drawers for electric apparatus portable, e.g. battery operated apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B32B15/016—Layered products comprising a layer of metal all layers being exclusively metallic all layers being formed of aluminium or aluminium alloys
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/03—Covers

Definitions

  • the embodiments of the present invention relate to the field of terminal technologies, and in particular, to a terminal housing and a terminal.
  • metal-based smart phones have become more and more popular among consumers.
  • most of the metal appearance parts of smart phones are made of aluminum alloy, which leads to serious homogenization of the appearance of the mobile phone.
  • the appearance of aluminum alloy is made of aluminum alloy, and the shape of the appearance is obtained by stamping, CNC (computer numerical control) and other processing techniques, and then through surface treatment processes such as polishing, sand blasting, and anodizing.
  • the unique appearance effect of aluminum alloy has complicated processing technology, long processing cycle, low production efficiency, high cost and low gloss of metal appearance.
  • Embodiments of the present invention are directed to a terminal housing and a terminal having the same, which have a metal appearance effect unique to stainless steel, a high gloss of the appearance surface, and low manufacturing cost.
  • an embodiment of the present invention provides a terminal housing, at least a portion of which includes an inner layer and an outer layer, the inner layer is an aluminum layer or an aluminum alloy layer, and the outer layer is a stainless steel layer,
  • the aluminum layer or the aluminum alloy layer faces the inside of the terminal
  • the stainless steel layer faces the outside of the terminal
  • the aluminum layer or the aluminum alloy layer has a thickness of 0.3-1.0 mm
  • the stainless steel layer has a thickness of 0.05-0.3 mm.
  • the aluminum layer or the aluminum alloy layer has a thickness of 0.5-0.9 mm
  • the stainless steel layer has a thickness of 0.1-0.2 mm.
  • the stainless steel of the stainless steel layer includes at least one of 304 stainless steel, 301 stainless steel, or 316 stainless steel.
  • the aluminum alloy of the aluminum alloy layer includes at least one of A1050, A5052, and A6063.
  • the inner layer and the outer layer are bonded together by molecular force by pressing.
  • the area of the inner casing and the outer layer on the terminal casing has a cupping value greater than or equal to 6 mm.
  • the stainless steel layer has a surface Vickers hardness greater than or equal to 300.
  • the area of the inner casing and the outer layer on the terminal casing has a pulling strength greater than or equal to 200 MPa.
  • a region of the terminal housing including the inner layer and the outer layer has an elongation ratio greater than or equal to 20%.
  • the 180 degree peeling force of the region including the inner layer and the outer layer on the terminal housing is greater than or equal to 100N.
  • the terminal housing is a terminal back cover.
  • An embodiment of the present invention further provides a terminal, where the terminal includes the foregoing terminal shell.
  • the terminal casing provided by the embodiment of the invention has the special metal appearance effect of stainless steel, has high gloss on the appearance surface, light weight, simple manufacturing process and low cost, and is suitable for large-scale industrial production.
  • FIG. 1 is a schematic structural view of a composite metal material according to an embodiment of the present invention.
  • FIG. 2 is a schematic view showing a process flow of a press-bonding preparation process of a composite metal material according to an embodiment of the present invention
  • FIG. 3 is a process flow diagram of a back cover of a mobile phone according to an embodiment of the present invention.
  • FIG. 4 is a physical photograph of a back cover of a mobile phone prepared in an embodiment of the present invention.
  • FIG. 5 is a process flow diagram of a back cover of a mobile phone according to another embodiment of the present invention.
  • FIG. 6 is a schematic cross-sectional view showing a back cover of a mobile phone prepared in another embodiment of the present invention.
  • FIG. 7 is a schematic front view showing the structure of a back cover of a mobile phone prepared in another embodiment of the present invention.
  • FIG. 8 is a schematic view showing the reverse structure of a rear case of a mobile phone prepared according to another embodiment of the present invention.
  • FIG. 9 is an exploded view of a terminal according to an embodiment of the present invention.
  • Embodiments of the present invention provide a terminal housing. At least a portion of the terminal housing includes an inner layer and an outer layer.
  • the inner layer is an aluminum layer or an aluminum alloy layer, that is, the inner layer is made of aluminum or an aluminum alloy.
  • the outer layer is a stainless steel layer, ie the outer layer is made of stainless steel.
  • the stainless steel layer faces the outside of the terminal, that is, the stainless steel layer is on the outer surface side of the terminal housing, that is, when the user is using the terminal, the user can directly contact the stainless steel layer.
  • the terminal housing is made of a composite metal material.
  • FIG. 1 it is a schematic structural view of a composite metal material according to an embodiment of the present invention, and the composite metal material includes an aluminum or aluminum alloy layer 11 and a stainless steel layer 12 .
  • the terminal housing provided by the embodiment of the present invention is partially or entirely made of a composite metal material, and the stainless steel layer faces the outside of the terminal, that is, the stainless steel side serves as the outer surface of the terminal housing, and the aluminum or aluminum alloy side serves as the inner surface of the terminal housing. Therefore, the unique appearance of the stainless steel can be obtained, and the quality of the terminal casing can be ensured.
  • the aluminum layer or the aluminum alloy layer has a thickness of 0.5-0.9 mm
  • the stainless steel layer has a thickness of 0.1-0.2 mm
  • the thickness of the aluminum layer or the aluminum alloy layer It may be 0.6-0.8 mm or 0.7 mm
  • the stainless steel layer may have a thickness of 0.15 mm.
  • the composition ratio of the aluminum or aluminum alloy layer to the stainless steel layer can be determined according to actual needs.
  • the stainless steel layer may be at least one of 304 stainless steel, 301 stainless steel or 316 stainless steel.
  • stainless steel such as SUS304, SUS301, SUS316 may be used, but is not limited to the above models.
  • the aluminum layer or the aluminum alloy layer may be made of the following types of materials, such as 1050 aluminum plate, 5052 aluminum plate, and 6063 aluminum plate, but is not limited to the above models.
  • 1050 aluminum plate is generally pure aluminum plate
  • 5052 aluminum plate and 6063 aluminum plate are aluminum alloy plate.
  • the aluminum layer or the aluminum alloy layer and the stainless steel layer are tightly bonded together by molecular force by pressing.
  • the 180° peeling force of the region made of the composite metal material on the terminal casing is greater than or equal to 100 N (bovine), for example, the peeling force may be 110 N, 120 N, 130 N, or the like.
  • the terminal shell is made of a composite metal material, and the cup protrusion value from the side of the stainless steel layer or the side of the aluminum layer or the aluminum alloy layer is greater than or equal to 6 mm. It can be 6-15 mm, further 6-12 mm.
  • the stainless steel layer has a surface Vickers hardness of 300 or more, specifically 300-1800, and further 800-1500.
  • the drawing strength of the region made of the composite metal material on the terminal casing is greater than or equal to 200 MPa, specifically 200-900 MPa, and further 300-600 MPa.
  • Composite metal material The ducted area has a ductility of greater than or equal to 20%, specifically from 20% to 60%, further from 30% to 55%.
  • the terminal housing may be a terminal back cover, such as a back cover of a mobile phone.
  • the press-bonding preparation process of the composite metal material is specifically as follows: providing a stainless steel raw material 1, and an aluminum or aluminum alloy raw material 2, and pressing the above two raw materials by pressure roller composite to The composite metal material precursor 3 is obtained together, and then the composite metal material precursor 3 is subjected to heat treatment, and after the heat treatment is completed, the surface flattening treatment is performed, and finally, the composite metal material 4 of a desired size is obtained by slitting to prepare a terminal shell.
  • the stainless steel raw material has a thickness ranging from 0.1 to 0.5 mm
  • the aluminum or aluminum alloy raw material has a thickness ranging from 0.3 to 10 mm.
  • the terminal casing can be prepared by the following process: firstly, the composite metal material of the required size is processed into the shape of the pre-prepared terminal casing by stamping, CNC, etc., and then the surface treatment is used to realize the unique characteristic of the stainless steel.
  • the metallic appearance of the decorative effect gives the terminal housing.
  • the surface treatment may be at least one of polishing, sand blasting, wire drawing, PVD (physical vapor deposition) plating, and the like.
  • the preparation process may specifically include the following steps:
  • S31 providing a composite metal material: providing a composite metal material of a desired size in the form of a single plate, the composite metal material being composed of a stainless steel layer and an aluminum alloy layer laminated and bonded to each other; wherein the thickness of the aluminum layer or the aluminum alloy layer of the composite metal material 0.3-1.0mm, the thickness of the stainless steel layer is 0.05-0.3mm; the composition ratio of stainless steel to aluminum or aluminum alloy can be set according to actual needs, for example, in a specific embodiment, the thickness of the stainless steel layer is 0.1mm, aluminum alloy The thickness is 0.5mm;
  • processing shape using the stamping and CNC processing technology to process the composite metal material prepared in step S31 out of the shape of the back shell of the mobile phone;
  • the stainless steel high-gloss mirror is coated by evaporation or sputtering, and the stainless steel mirror surface is protected, and finally the mobile phone back shell product is obtained.
  • the physical structure of the back cover of the mobile phone obtained by the embodiment of the present invention can be seen in FIG. 4.
  • the coating layer can be transparent or color, which brings more decorative effects to the mirror surface.
  • the appearance of the stainless steel may be further achieved by sandblasting or drawing, and PVD coating.
  • the preparation process may specifically include the following steps:
  • a composite metal material providing a composite metal material: providing a composite metal material of a desired size in the form of a single plate, the composite metal material being composed of a stainless steel layer and an aluminum alloy layer laminated and bonded to each other; wherein the thickness of the aluminum layer or the aluminum alloy layer of the composite metal material 0.3-1.0mm, the thickness of the stainless steel layer is 0.05-0.3mm; the composition ratio of stainless steel to aluminum or aluminum alloy can be set according to actual needs, for example, in a specific embodiment, the thickness of the stainless steel layer is 0.1mm, aluminum alloy The thickness is 0.5mm;
  • step S52 processing shape and plastic filling shape: the composite metal material prepared in step S51 is processed into the shape of the back shell of the mobile phone and the shape of the subsequent bonding structure with the plastic (ie, the plastic filling shape) by using a stamping and CNC machining process; After processing the shape of the back shell of the mobile phone, the surface microporous treatment can be performed to form numerous nano-scale micropores on the surface of the composite metal material, thereby facilitating subsequent plastic injection molding;
  • plastic injection molding plastic injection into the joint structure reserved in step S52, complete plastic injection molding; wherein the plastic may be polybutylene terephthalate;
  • Fig. 6 is a schematic cross-sectional view showing the back cover of the mobile phone obtained in the embodiment.
  • the back cover of the mobile phone is composed of a composite metal material 10 including an inner layer (aluminum or aluminum alloy layer) 11 and a plastic 20 including an outer layer (stainless steel layer) 12.
  • the surface of the stainless steel layer 12 is a high-gloss mirror surface, and a protective plating film 30 is provided on the high-gloss mirror surface. 7 and FIG.
  • FIG 8 are schematic structural views of the front side (ie, the side facing the outside of the mobile phone) and the reverse side (ie, the side facing the inside of the mobile phone) of the back cover of the mobile phone prepared in the embodiment; the front side is the user when using the mobile phone Direct contact with one side, the reverse side is the inner surface that can be seen when the back cover of the phone is removed from the phone.
  • the embodiments of the present invention can be applied to any electronic device having a metal appearance structural member, and are not limited to the smart phone structural member, and the application method is consistent with the smart phone.
  • an embodiment of the present invention further provides a terminal, specifically a mobile phone, including a display device 110, a middle frame of the mobile phone, a main board 120, and a metal back shell 130.
  • the display device 110 is electrically connected to the motherboard.
  • the motherboard integrates various processors, memories, sensors, circuit modules, and the like.
  • the metal back shell 130 is located on a side facing away from the display device 110, and the metal back shell 130 is located outside the terminal.
  • the metal back shell 130 is the back shell of the mobile phone prepared in the above embodiment of the present invention, and the back shell of the mobile phone is partially or entirely made of a composite metal material.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Casings For Electric Apparatus (AREA)
  • Telephone Set Structure (AREA)

Abstract

本发明实施例提供了一种终端外壳。所述终端外壳的至少一部分包括内层和外层，所述内层为铝层或铝合金层，所述外层为不锈钢层，所述铝层或铝合金层朝向终端的内部，所述不锈钢层朝向所述终端的外部，所述铝层或铝合金层的厚度为0.3-1.0mm，所述不锈钢层的厚度为0.05-0.3mm。该终端外壳具有不锈钢特有的金属外观效果，外观面光泽度高，制造成本低。本发明实施例还提供一种包括上述终端外壳的终端。

Description

一种终端外壳及终端 技术领域
本发明实施例涉及终端技术领域，特别是涉及一种终端外壳及终端。
背景技术
近年来，金属外观的智能手机，越来越受到消费者的青睐。而目前智能手机的金属外观件大多为铝合金材质，导致手机外观同质化严重。此外，铝合金材质的外观件是以铝合金为素材，通过冲压，CNC(计算机数字控制，computer numerical control)等加工工艺得到外观件形状，再通过抛光，喷砂，阳极处理等表面处理工艺实现铝合金特有的外观效果，其加工工艺复杂，加工周期长，生产效率低，成本高，金属外观光泽度低。
发明内容
本发明实施例旨在提供一种终端外壳及具有该外壳的终端，该外壳具有不锈钢特有的金属外观效果，外观面光泽度高，且制造成本低。
具体地，本发明实施例提供了一种终端外壳，所述终端外壳的至少一部分包括内层和外层，所述内层为铝层或铝合金层，所述外层为不锈钢层，所述铝层或铝合金层朝向终端的内部，所述不锈钢层朝向所述终端的外部，所述铝层或铝合金层的厚度为0.3-1.0mm，所述不锈钢层的厚度为0.05-0.3mm。
可选地，所述铝层或铝合金层的厚度为0.5-0.9mm，所述不锈钢层的厚度为0.1-0.2mm。
所述不锈钢层的不锈钢包括304不锈钢、301不锈钢或316不锈钢中的至少一种。所述铝合金层的铝合金包括A1050、A5052、A6063中的至少一种。
可选地，所述内层与所述外层通过压合以分子力结合在一起。
可选地，所述终端外壳上包括所述内层和外层的区域的杯突值大于或等于6mm。
可选地，所述不锈钢层的表面维氏硬度大于或等于300。
可选地，所述终端外壳上包括所述内层和外层的区域的拉拔强度大于或等于200兆帕。
可选地，所述终端外壳上包括所述内层和外层的区域的延展率大于或等于20％。
可选地，当测试样条宽度为20mm时，所述终端外壳上包括所述内层和外层的区域的180度剥离力大于或等于100N。
可选地，所述终端外壳为终端后盖。
本发明实施例还提供了一种终端，所述终端包括上述的终端外壳。
本发明实施例提供的终端外壳具有不锈钢特有的金属外观效果，外观面光泽度高，质量较轻，且制造工艺简单，成本低，适于大规模的工业生产。
附图说明
图1为本发明实施例中复合金属材料的结构示意图；
图2为本发明实施例中复合金属材料的压合制备工艺流程示意图；
图3为本发明一实施方式中的手机后壳的工艺流程图；
图4为本发明一实施方式中制备得到的手机后壳的实物照片；
图5为本发明另一实施方式中的手机后壳的工艺流程图；
图6为本发明另一实施方式中制备得到的手机后壳的剖面示意图；
图7为本发明另一实施方式中制备得到的手机后壳的正面结构示意图；
图8为本发明另一实施方式中制备得到的手机后壳的反面结构示意图；
图9为本发明实施例提供的终端的爆炸图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例进行说明。
本发明实施例提供了一种终端外壳。所述终端外壳的至少一部分包括内层和外层。所述内层为铝层或铝合金层，即所述内层由铝或铝合金制成。所述外层为不锈钢层，即所述外层由不锈钢制成。当所述终端外壳安装在终端上时，所述内层朝向所述终端的内部，所述外层朝向所述终端的外部。所述内层的厚度为0.3-1.0毫米(mm)，所述外层的厚度为0.05-0.3mm。
所述不锈钢层朝向所述终端的外部，即不锈钢层在终端外壳的外表面一侧，也就是用户在使用终端时，用户可以直接接触到所述不锈钢层。
本发明实施方式中，所述终端外壳的至少一部分或全部是采用复合金属材料制成的。具体地，如图1所示，为本发明实施例中复合金属材料的结构示意图，该复合金属材料包括铝或铝合金层11和不锈钢层12。本发明实施例提供的终端外壳，由于部分或全部采用复合金属材料制成，不锈钢层朝向终端的外部，即不锈钢一侧作为终端外壳的外表面，铝或铝合金一侧作为终端外壳的内表面，因而既能获得不锈钢特有的外观效果，又能保证终端外壳质量较轻。
本发明一可选实施方式中，所述铝层或铝合金层的厚度为0.5-0.9mm，所述不锈钢层的厚度为0.1-0.2mm，进一步地，所述铝层或铝合金层的厚度可以为0.6-0.8mm或0.7mm，所述不锈钢层的厚度可以为0.15mm。铝或铝合金层与不锈钢层的构成比例可按照实际需求制定。
本发明实施方式中，所述不锈钢层可以采用304不锈钢、301不锈钢或316不锈钢中的至少一种，具体可以采用如下型号的不锈钢，如SUS304、SUS301、SUS316，但不限于上述的这些型号。所述铝层或铝合金层可以采用如下型号的材质，如1050铝板、5052铝板、6063铝板，但不限于上述的这些型号。其中，1050铝板一般为纯铝板，5052铝板和6063铝板为铝合金板。
本发明实施方式中，所述铝层或铝合金层与所述不锈钢层通过压合以分子力紧密结合在一起。当测试样条宽度为20mm时，所述终端外壳上采用复合金属材料制成的区域的180°剥离力大于或等于100N(牛)，例如该剥离力可以为110N、120N、130N等。
本发明实施方式中，所述终端外壳上采用复合金属材料制成的区域，从不锈钢层一侧顶出或从铝层或铝合金层一侧顶出的杯突值均大于或等于6mm，具体可以是6-15mm，进一步地为6-12mm。
本发明实施方式中，所述不锈钢层的表面维氏硬度大于或等于300，具体地可以是300-1800，进一步地为800-1500。
本发明实施方式中，所述终端外壳上采用复合金属材料制成的区域的拉拔强度大于或等于200兆帕(MPa)，具体可以是200-900MPa，进一步地为300-600Mpa。采用复合金属材料 制成的区域的延展率大于或等于20％，具体可以是20％-60％，进一步地为30％-55％。
本发明实施方式中，所述终端外壳可以是终端后盖，如手机后壳。
如图2所示，本发明实施方式中，所述复合金属材料的压合制备工艺具体如下：提供不锈钢原材料1、以及铝或铝合金原材料2，通过压轮复合将上述两种原材料压合到一起得到复合金属材料前驱体3，然后将该复合金属材料前驱体3进行热处理，热处理完成后再进行表面平坦化处理，最后通过分切得到所需尺寸的复合金属材料4，用以制备终端外壳。可选地，不锈钢原材料厚度范围为0.1-0.5mm，铝或铝合金原材料厚度范围为0.3-10mm。
本发明实施方式中，终端外壳可以采用如下的工艺流程制备得到：先采用冲压、CNC等加工工艺将所需尺寸的复合金属材料加工成预制备的终端外壳的外形，然后通过表面处理实现不锈钢特有的金属外观装饰效果，得到终端外壳。其中表面处理可以是抛光、喷砂、拉丝、PVD(physical vapor deposition,物理气相沉积)镀膜等方式中的至少一种。
具体地，如图3所示，本发明实施方式中，以手机后壳为例，当手机后壳全部采用复合金属材料制备时，制备的工艺流程具体可以包括如下步骤：
S31、提供复合金属材料：以单板的形式提供所需尺寸的复合金属材料，复合金属材料由相互层叠结合的不锈钢层和铝合金层构成；其中复合金属材料的铝层或铝合金层的厚度为0.3-1.0mm，不锈钢层的厚度为0.05-0.3mm；不锈钢与铝或铝合金的构成比例可按照实际需求制定，例如，在一具体实施例中，不锈钢层的厚度为0.1mm，铝合金的厚度为0.5mm；
S32、加工外形：采用冲压和CNC加工工艺将步骤S31准备的复合金属材料加工出手机后壳的外形；
S33、不锈钢表面抛光：对不锈钢表面进行抛光处理实现高光泽度镜面效果；
S34、不锈钢抛光面镀膜：通过蒸镀或溅镀的方式对不锈钢高光泽度镜面实施镀膜，对不锈钢的镜面进行保护，最终得到手机后壳产品。本发明实施方式所获得的手机后壳实物可参见图4。镀膜层可以是透明的也可以做颜色，为镜面带来更多的装饰效果。
本发明其他实施方式中，抛光后也可以进一步通过喷砂或拉丝、以及PVD镀膜的方式实现等外观处理方式实现不锈钢特有的金属外观装饰效果。
本发明另一实施方式中，如图5所示，以手机后壳为例，当手机后壳部分采用复合金属材料制备，部分为塑胶制备时，制备的工艺流程具体可以包括如下步骤：
S51、提供复合金属材料：以单板的形式提供所需尺寸的复合金属材料，复合金属材料由相互层叠结合的不锈钢层和铝合金层构成；其中复合金属材料的铝层或铝合金层的厚度为0.3-1.0mm，不锈钢层的厚度为0.05-0.3mm；不锈钢与铝或铝合金的构成比例可按照实际需求制定，例如，在一具体实施例中，不锈钢层的厚度为0.1mm，铝合金的厚度为0.5mm；
S52、加工外形及塑胶填充形状：采用冲压和CNC加工工艺将步骤S51准备的复合金属材料加工出手机后壳的外形及后续与塑胶结合结构的形状(即塑胶填充形状)；本发明实施方式中，加工好手机后壳的外形后，还可以进行表面微孔处理，使复合金属材料表面形成无数的纳米级微孔，从而有利于后续的塑胶注塑；
S53、塑胶注塑：将塑胶注塑到步骤S52中预留的结合结构内，完成塑胶注塑；其中塑胶具体可以是聚对苯二甲酸丁二醇酯；
S54、加工外形：塑胶注塑完成后，再次通过CNC加工将多余的复合金属材料和塑胶部分铣掉，得到所需的结构件外形；
S55、不锈钢及塑胶表面抛光：对不锈钢表面及不锈钢一侧的塑胶进行抛光处理实现高光 泽度镜面效果；
S56、不锈钢及塑胶抛光面镀膜：通过蒸镀或溅镀的方式对不锈钢及塑胶的高光泽度镜面实施镀膜，对不锈钢的镜面进行保护，最终得到手机后壳产品。
图6为本实施方式所获得的手机后壳的剖面示意图。手机后壳由复合金属材料10和塑胶20构成，所述复合金属材料10包括内层(铝或铝合金层)11，以及包括外层(不锈钢层)12。其中，在不锈钢层12的表面为高光泽度镜面，在该高光泽度镜面上设置有保护镀膜30。图7和图8分别为本实施方式中制备得到的手机后壳的正面(即朝向手机外部的一面)和反面(即朝向手机内部的一面)的结构示意图；正面即用户在使用手机时，可以直接接触到一面，反面即当把手机后壳从手机上拆掉时，可以看到的内表面。
本发明实施例可适用于任何具有金属外观结构件的电子设备，不局限于智能手机结构件，应用方法与智能手机上一致。
本发明各实施例之间相关部分可以相互参考。
如图9所示，本发明实施例还提供了一种终端，具体为手机，包括显示装置110、手机中框及主板120、金属后壳130。所述显示装置110与所述主板电连接。所述主板集成了各种处理器、存储器、传感器、电路模块等。所述金属后壳130位于背离所述显示装置110的一侧，且所述金属后壳130位于所述终端的外侧。所述金属后壳130即为本发明实施例上述制备得到的手机后壳，所述手机后壳部分或全部采用复合金属材料制成。
需要说明的是，根据上述说明书的揭示和阐述，本发明所属领域的技术人员还可以对上述实施方式进行变更和修改。因此，本发明并不局限于上面揭示和描述的具体实施方式，对本发明的一些等同修改和变更也应当在本发明的权利要求的保护范围之内。此外，尽管本说明书中使用了一些特定的术语，但这些术语只是为了方便说明，并不对本发明构成任何限制。

Claims (12)

  1. 一种终端外壳，其特征在于，所述终端外壳的至少一部分包括内层和外层，所述内层为铝层或铝合金层，所述外层为不锈钢层，所述铝层或铝合金层朝向终端的内部，所述不锈钢层朝向所述终端的外部，所述铝层或铝合金层的厚度为0.3-1.0mm，所述不锈钢层的厚度为0.05-0.3mm。
  2. 根据权利要求1所述的终端外壳，其特征在于，所述铝层或铝合金层的厚度为0.5-0.9mm，所述不锈钢层的厚度为0.1-0.2mm。
  3. 根据权利要求1或2所述的终端外壳，其特征在于，所述不锈钢层的不锈钢包括304不锈钢、301不锈钢或316不锈钢中的至少一种。
  4. 根据权利要求1-3任一所述的终端外壳，其特征在于，所述铝层或铝合金层的铝或铝合金包括1050铝板、5052铝板或6063铝板中的至少一种。
  5. 根据权利要求1-4任一所述的终端外壳，其特征在于，所述内层与所述外层通过压合以分子力结合在一起。
  6. 根据权利要求1-5任一所述的终端外壳，其特征在于，所述终端外壳上包括所述内层和所述外层的区域的杯突值大于或等于6mm。
  7. 根据权利要求1-6任一所述的终端外壳，其特征在于，所述不锈钢层的表面维氏硬度大于或等于300。
  8. 根据权利要求1-7任一所述的终端外壳，其特征在于，所述终端外壳上包括所述内层和所述外层的区域的拉拔强度大于或等于200MPa。
  9. 根据权利要求1-8任一所述的终端外壳，其特征在于，所述终端外壳上包括所述内层和外层的区域的延展率大于或等于20％。
  10. 根据权利要求1-9任一所述的终端外壳，其特征在于，当测试样条宽度为20mm时，所述终端外壳上包括所述内层和外层的区域的180度剥离力大于或等于100N。
  11. 根据权利要求1-10任一所述的终端外壳，其特征在于，所述终端外壳为终端后盖。
  12. 一种终端，其特征在于，所述终端包括如权利要求1-11任一项所述的终端外壳。
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