KR20160143905A - Metal case of mobile terminal and manufacturing method thereof - Google Patents

Metal case of mobile terminal and manufacturing method thereof Download PDF

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Publication number
KR20160143905A
KR20160143905A KR1020150078981A KR20150078981A KR20160143905A KR 20160143905 A KR20160143905 A KR 20160143905A KR 1020150078981 A KR1020150078981 A KR 1020150078981A KR 20150078981 A KR20150078981 A KR 20150078981A KR 20160143905 A KR20160143905 A KR 20160143905A
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KR
South Korea
Prior art keywords
metal
case
external metal
frame
enclosure
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KR1020150078981A
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Korean (ko)
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KR101744215B1 (en
Inventor
장현
이영섭
편도복
오상정
이한상
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(주) 장원테크
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Priority to KR1020150078981A priority Critical patent/KR101744215B1/en
Publication of KR20160143905A publication Critical patent/KR20160143905A/en
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Publication of KR101744215B1 publication Critical patent/KR101744215B1/en

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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
    • H05K5/04—Metal casings
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation

Abstract

Provided are an external metal case for a mobile terminal and a method for manufacturing an external metal case. The present invention relates to the method for manufacturing an external metal case whose exterior has desirable quality. The method for manufacturing an external metal case comprises the steps of: preparing an external metal frame; fabricating an external metal case, including the external metal frame and a rear case formed on a bottom surface of the external metal frame in an integrated manner, by injecting molten nonferrous metal into a mold after the prepared external metal frame has been mounted in the mold; coating the fabricated external metal case; removing a coated layer from a surface of the external metal frame constituting the external metal case; and forming an oxide thin film on the surface of the external metal frame by performing anodizing treatment on the external metal case from which the coated layer has been removed.

Description

[0001] METAL CASE OF MOBILE TERMINAL AND MANUFACTURING METHOD THEREOF [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a metal case for a mobile terminal, and more particularly, to a metal case for a mobile terminal by an INSERT method and then to an excellent external quality of two tone through coating or anodizing The present invention relates to a metal case for a mobile terminal and a method of manufacturing the same.

As the functions are diversified, the terminal is implemented in the form of a multimedia device having a complex function of, for example, taking pictures or moving pictures, playing music or moving picture files, receiving games and receiving broadcasts have.

Such a terminal may be divided into a mobile terminal and a stationary terminal depending on whether the terminal is movable or not. Among them, the mobile terminal is a portable device having at least one function that can carry out voice and video communication, a function to input and output information, and a function to store data while being portable.

Among the various parts constituting the mobile terminal, since the metal case is exposed as an external appearance of the mobile terminal, excellent external quality is required.

As a conventional method for securing the exterior quality of the metal case of the mobile terminal, a metal case is manufactured by using die casting, then the metal case is polished to a predetermined position, and then the metal case is painted Method. However, the above method is relatively easy and economical, but there is a problem that the exterior quality of the metal case is not good due to the characteristics of the die casting product.

Therefore, in order to solve the problem of the prior art, as shown in FIG. 1, a metal case of a mobile terminal is manufactured through a mechanical process such as CNC machining, and then the metal case is painted or anodized in a subsequent process, A technique for improving the external quality of the product is being developed. However, this technology can achieve excellent exterior quality by the anodizing treatment of the product, but it takes a lot of time and cost to manufacture the metal case, which is problematic in that it is uneconomical.

Therefore, there is a demand for a new technology which can easily manufacture a metal case for a mobile terminal, while ensuring the external quality of the product by an anodizing process.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to overcome the problems of the prior art, and it is an object of the present invention to provide a metal outer case for a mobile terminal by an INSERT injection molding method, And it is an object of the present invention to provide a method of manufacturing a metal frame for a mobile terminal that exhibits an exterior quality.

It is another object of the present invention to provide a metal case for a mobile terminal manufactured by the above manufacturing method.

Further, the technical problems to be solved by the present invention are not limited to the technical problems mentioned above, and other technical problems which are not mentioned can be understood from the following description in order to clearly understand those skilled in the art to which the present invention belongs .

According to an aspect of the present invention,

A step of providing a metal outer frame;

A step of preparing a metal enclosure including the metal enclosure frame and the rear case formed integrally with the lower surface of the metal enclosure frame by charging the metal enclosure frame into the metal mold and then injecting molten metal into the metal enclosure frame ;

A step of coating the manufactured metal case;

Removing the coating layer formed on the surface of the metal enclosure forming the metal enclosure; And

And a step of forming an oxide film on the surface of the metal enclosure by anodizing the metal enclosure from which the painted layer has been removed, to a method for manufacturing a metal enclosure for a mobile terminal.

Further, according to the present invention,

A metal sheath frame having an oxide film formed on its surface by anodizing; And

And a rear case integrally formed with the lower surface of the metal enclosure frame and having a coating layer formed on the surface thereof, the rear case being manufactured by die casting

In the present invention, the metal constituting the metal sheath frame may be any one of an aluminum alloy, a magnesium alloy, a titanium alloy, and a stainless steel.

Also, in the present invention, the metal enclosure can be manufactured by forging and extrusion molding.

The metal sheath frame can also be manufactured through mechanical processing such as CNC.

Further, in the present invention, the rear case may be made of at least one selected from the group consisting of Al, Mg, Zn and Cu.

The present invention having the above-described structure can easily manufacture a metal enclosure frame by forging and extruding, and includes a rear case integrally formed with a lower surface of a metal enclosure frame by an INSERT method in a subsequent die casting process It is economical.

Also, the metal case formed in the manufacturing process is painted, and then the coating layer formed on the surface of the metal case is removed and anodized to facilitate the metal case for a mobile terminal having excellent exterior quality of two tone .

1 is a schematic view showing a metal outer frame for a mobile terminal manufactured by a conventional machining method.
2 is a schematic view schematically showing the appearance of a typical mobile terminal.
3 (ae) is a schematic view showing a manufacturing process of a metal case for a mobile terminal through a manufacturing method according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

However, the embodiments of the present invention may be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. The shape and the size of the elements in the drawings may be exaggerated for clarity and the same elements are denoted by the same reference numerals in the drawings. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

The mobile terminal 100 described in the present specification may be a cellular phone, a smart phone, a laptop computer, a tablet PC, a digital broadcasting terminal, a PDA (personal digital assistant), a portable multimedia Player), navigation, and the like.

However, it will be readily appreciated by those of ordinary skill in the art that the configuration according to the embodiments described herein may be applied to fixed terminals such as a digital TV, a desktop computer, and the like, .

2 is a schematic view schematically showing the appearance of a typical mobile terminal. As shown in FIG. 1, the mobile terminal 10 may have a bar-shaped appearance. The bar-shaped mobile terminal 10 includes a front case 1 having a display device, an input device, , A rear case (3) formed separately for attaching and detaching the battery pack, and a metal frame (2) positioned between the front case and the rear case to form an outer appearance of the mobile terminal and serving as a base member for providing durability can do.

However, the present invention is not limited thereto. The metal frame may be a slide type in which two or more bodies are relatively movably coupled, a bar type, a folder type, a swing type , Swivel type, and so on.

3 (a-e) are schematic views showing a manufacturing process of a metal case for a mobile terminal through a manufacturing method according to an embodiment of the present invention.

3 (a), in the present invention, first, a metal enclosure frame 110 is provided for manufacturing a metal case for a mobile terminal.

In the present invention, the metal sheathing frame 110 may be manufactured by forging and extrusion molding in one embodiment thereof. Alternatively, the metal enclosure 110 may be manufactured through mechanical processing using CNC or the like.

Also, in the present invention, the metal constituting the metal enclosure 110 may be a metal that can be mechanically processed by any one of aluminum alloy, magnesium alloy, titanium alloy, and stainless steel.

Next, in the present invention, the metal outer frame 110 is loaded into a mold. That is, the metal enclosure 100 is manufactured using the die casting method using INSERT injection. 3 (b), when the metal outer frame 110 is loaded into the metal mold and the non-ferrous metal is injected into the metal mold, the metal outer frame 110 and the metal outer frame 110, And the rear case 130 integrally formed with the lower surface of the rear case 110 can be manufactured.

In the present invention, it is preferable to use a metal or an alloy composed of at least one selected from the group consisting of Al, Mg, Zn, and Cu, although it is not limited to the specific kind of the non-ferrous metal component and its component range.

The non-ferrous metal component is also a component constituting the rear case 130 in the present invention. Therefore, in the present invention, the rear case 130 may be made of at least one selected from the group consisting of Al, Mg, Zn, and Cu.

Subsequently, in the present invention, as shown in Fig. 3 (c), the metal enclosure 100 manufactured as described above is painted. Such painting can be performed using well-known conventional painting methods, and is not limited to a specific painting method. In addition, the surface of the metal case 100 can be provided with a desired color by the coating, and particularly the surface color of the rear case 130 is formed.

3 (d), the coating layer formed on the surface of the metal enclosure 110 constituting the metal enclosure 100 is removed. If such a coating layer exists, the coating layer formed on the surface of the metal enclosure 110 requiring anodizing treatment is first removed because the coating layer is electrically insulated from the subsequent anodizing process to form an oxide coating.

In the present invention, as shown in FIG. 3 (e), the metal case 100 from which the coating layer has been removed is anodized. By the anodizing treatment, an oxide film is formed on the metal enclosure frame 110 from which the paint layer is removed, and thus it is possible to obtain excellent exterior quality. However, in the rear case 130 having the coating layer formed on the surface thereof, electricity is insulated so that the anodizing process is not performed in the innodizing process, and the colored layer formed in the coating process is maintained as it is.

However, the present invention is not limited to the specific production process conditions of the anodizing process, and general anodizing process conditions well known in the art can be used. For example, the surface of the metal casing frame 110 can be anodized by sequentially degreasing, cleaning, etching, chemical polishing, washing, and anodizing the polished metal frame.

Further, in the present invention, a coloring step may be additionally provided to the anodized metal outer frame 100, whereby a metal frame having a surface having various colors can be manufactured.

Next, a metal sheath for a mobile terminal of the present invention will be described.

The metal case 100 for a mobile terminal according to the present invention first includes a metal enclosure 110 having an oxide film formed on its surface by an anodizing process.

Here, the metal enclosure frame 110 can be manufactured by forging and extrusion molding. Alternatively, the metal enclosure 110 may be manufactured by a mechanical process such as CNC.

In addition, in the present invention, the metal constituting the metal enclosure 110 may be any one of an aluminum alloy, a magnesium alloy, a titanium alloy, and a stainless steel.

The metal enclosure 100 of the present invention includes a rear case 130 manufactured by die casting, which is integrally formed with the lower surface of the metal enclosure frame 110 and has a paint layer formed on the surface thereof do.

In the present invention, the rear case 130 may include at least one selected from the group consisting of Al, Mg, Zn, and Cu.

As described above, in the present invention, the metal enclosure frame 110 manufactured by forging, extrusion molding, or mechanical processing is subjected to an external quality by an anodizing treatment. On the other hand, the rear case 130 manufactured by die casting imparts exterior quality to its surface through a painting process.

Therefore, the metal enclosure 100 of the present invention is advantageous in that a metal enclosure can be manufactured with a low manufacturing cost as well as an excellent exterior quality of a two-tone effect by combining painting and anodizing.

While the present invention has been particularly shown and described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of course, this is possible. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by equivalents as well as the following claims

110 ......... Metal outer frame
130 ......... rear case

Claims (10)

A step of providing a metal outer frame;
A step of preparing a metal enclosure including the metal enclosure frame and the rear case formed integrally with the lower surface of the metal enclosure frame by charging the metal enclosure frame into the metal mold and then injecting molten metal into the metal enclosure frame ;
A step of coating the manufactured metal case;
Removing the coating layer formed on the surface of the metal enclosure forming the metal enclosure; And
And forming an oxide film on the surface of the metal enclosure by anodizing the metal enclosure from which the painted layer has been removed.
The method as claimed in claim 1, wherein the metal forming the metal enclosure is one of an aluminum alloy, a magnesium alloy, a titanium alloy, and a stainless steel.
The method according to claim 1, wherein the metal outer frame is manufactured by forging and extrusion molding.
The method as claimed in claim 1, wherein the metal outer frame is manufactured by mechanical working.
The method as claimed in claim 1, wherein the rear case comprises at least one selected from the group consisting of Al, Mg, Zn, and Cu.
A metal sheath frame having an oxide film formed on its surface by anodizing; And
And a rear case integrally formed with the lower surface of the metal case and having a paint layer formed on the surface thereof.
[7] The metal case according to claim 6, wherein the metal forming the metal enclosure is one of an aluminum alloy, a magnesium alloy, a titanium alloy, and a stainless steel.
[7] The metal case according to claim 6, wherein the metal enclosure is manufactured by forging and extrusion molding.
The metal case according to claim 6, wherein the metal case is manufactured through mechanical processing.
7. The metal case according to claim 6, wherein the rear case comprises at least one selected from the group consisting of Al, Mg, Zn, and Cu.
KR1020150078981A 2015-06-04 2015-06-04 Metal case of mobile terminal and manufacturing method thereof KR101744215B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101880251B1 (en) * 2017-05-22 2018-07-20 (주) 장원테크 A method for manufacturing case having matal strengthening member, and case therefrom
WO2019027121A1 (en) * 2017-08-04 2019-02-07 이성수 Method for manufacturing titanium alloy having high radio wave transmittance
US10320960B2 (en) * 2015-06-19 2019-06-11 Tianjin M&C Electronics Co., Ltd. Metal frame and method of manufacturing the metal frame for the mobile communication terminal
WO2021082535A1 (en) * 2019-10-31 2021-05-06 华为技术有限公司 Manufacturing method for housing of electronic device, housing, and electronic device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100695530B1 (en) * 2005-07-14 2007-03-15 유진호 Multicolor formation method of aluminum surface
KR101201630B1 (en) * 2011-05-16 2012-11-14 박갑세 Cover for portable terminal and manufacturing method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10320960B2 (en) * 2015-06-19 2019-06-11 Tianjin M&C Electronics Co., Ltd. Metal frame and method of manufacturing the metal frame for the mobile communication terminal
KR101880251B1 (en) * 2017-05-22 2018-07-20 (주) 장원테크 A method for manufacturing case having matal strengthening member, and case therefrom
WO2019027121A1 (en) * 2017-08-04 2019-02-07 이성수 Method for manufacturing titanium alloy having high radio wave transmittance
KR20190014862A (en) * 2017-08-04 2019-02-13 이성수 Method of Manufacture for Titanium Alloy With High Electrostatic Transmission
WO2021082535A1 (en) * 2019-10-31 2021-05-06 华为技术有限公司 Manufacturing method for housing of electronic device, housing, and electronic device

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