TWI391538B - Housing plating method and housing therewith of making it - Google Patents

Description

Shell plating method and outer casing made by applying the plating method

The present invention relates to an electroplating method for an outer casing and an outer casing produced by the electroplating method.

With the rapid development of information technology, portable electronic devices such as mobile phones, PDAs (Personal Digital Assistants) and notebook computers are becoming more and more popular, and the appearance and aesthetics of electronic device casings are getting more and more popular. Concern and attention. In the prior art, in order to improve the appearance quality of the surface of the electronic product casing, various surface decoration treatment techniques are employed to decorate the surface or sidewall of the electronic device. Commonly used methods such as electroplating can make the electronic device have a metallic luster to enhance its appearance quality and aesthetics.

Since the side walls of these electronic products are provided with buttons such as adjusting the volume, starting the camera function, etc., it is also possible that the plurality of blocks of the plated portion are scattered regions and are not continuous due to design requirements. In the prior art, for these discontinuous, electroplated parts, electroplating treatment is required, and then ultrasonic or hot-melt bonding is used to connect the substrate to have a metallic luster to enhance the appearance.

However, the above electroplating method requires a multi-step electroplating process, the electroplating process is cumbersome and increases the cost; in addition, each electroplating part needs to be separated into a single electroplating, and if the external environment or the solution density is slightly changed, the gloss, color, etc. of the electroplating part are It has a great influence. If these different parts such as gloss are attached to the substrate, the appearance quality of the image product will be severely affected.

In view of the above, the present invention provides a method of shell plating that can form a plated surface at one time to reduce processing steps.

Further, the present invention provides an outer casing made by the above method.

A manufacturing method of the outer casing, the manufacturing method comprising the steps of: forming a casing blank, comprising a base body, wherein the base body is provided with at least two components and at least one connecting member, the connecting member connecting the components; The connecting member and the assembly are pre-treated to adhere a conductive material thereon; electroplating is performed to form a plating layer on the assembly; and the connecting member is removed.

An outer casing made by the manufacturing method, comprising a base body and a plurality of components, the component is disposed on the base body, and the surface of the plurality of components is coated with a plating layer.

Compared with the prior art, the outer casing manufacturing method is simple in processing, reduces processing steps, and saves manufacturing costs. By the manufacturing method, the non-connected plurality of components can be obtained by electroplating only once, and the effect of having the same metallic luster can be obtained, thereby improving the aesthetic appearance of the product.

Compared with the prior art, the surface of the outer casing can be formed with a plurality of components of the same metallic luster at one time, so that the appearance of the product is decorated and beautified.

The present invention provides a housing 80 that is preferably applied to a mobile phone.

Referring to Figures 1 and 2, the outer casing blank 50 of the outer casing 80 includes a substantially rectangular parallelepiped base 501, preferably made of polycarbonate (PC). A plurality of "ㄇ"-shaped connecting frames 70 are integrally formed on the surface of the base 501, and the plurality of "ㄇ"-shaped connecting frames 70 are connected to the set of sheets 60. The set of sheets 60 includes a first set of sheets 602 and a second set of sheets 604. The third set of slices 606 and the fourth set of slices 608. The connection frame 70 includes a first connection frame 702, a second connection frame 704, and a third connection frame 706. The first set of sheets 602, the second set of sheets 604 and the third set of sheets 606 are formed on the outer peripheral wall of the long side of the base 501, and the fourth set of sheets 608 are formed on the upper part of the upper surface of the base 501, and The short sides of the base body 501 are parallel, and the two ends of the fourth set of sheets 608 extend downwardly and cooperate with the outer peripheral wall of the base 501. The first connecting frame 702 connects the fourth set of pieces 608 and the first set of pieces. 602. The second connection frame 704 is connected to the first group of slices 602 and the second group of slices 604. The third connection frame 706 is connected to the third group of slices 606 and the fourth group of slices 608. The connection frame 70 is respectively connected to the group. The ends of the sheet 60 are vertically protruded from the two-shot injection molding machine to project the base 501, the multi-array sheet 60 and the lower surface of the joint frame base 501. The preferred embodiment of the outer shell blank 50 is integrally formed from 70. The composite sheet 60 and the connecting frame 70 are preferably made of Acrylonitrile-Butadiene-Styrene (ABS). Further pretreatment is carried out to react acrylonitrile-butadiene-styrene with the chemical solution in the pretreatment, and a metal conductive layer is formed on the surface of the acrylonitrile-butadiene-styrene sheet 60 and the connecting frame 70. membrane. After electroplating, a coating of metal luster is formed on the surface of the sheet 60 and the connecting frame 70. Finally, the connection frame 70 is removed to form the desired housing 80, as shown in FIG.

Referring to FIG. 4, the manufacturing method specifically includes the following steps: two plastic injection molding machines are used to inject two plastic bodies of different materials into the cavity, and after cooling, a casing blank 50 is formed, one of which is formed. The base 501 is formed, and the other is formed into a panel 60 and a connection frame 70.

The formed outer shell blank 50 is pretreated, and the surface of the outer shell blank 50 can be cleaned with an alkaline solution such as NaOH or Na ₂ CO ₃ to remove oil stains and impurities; and then sandblasted, barreled, and abrasive cloth rubbed. The method of mechanical roughening or chemical roughening is to roughen the surface of the set of sheets 60 and the connecting frame 70 to improve the bonding force of the subsequent plating forming plating layer with the set piece 60 and the connecting frame 70; The outer shell blank 50 is immersed in the sensitizing liquid to adsorb a layer of easily oxidizable metal substance on the surface of the sheet 60 and the connecting frame 70; and the sensitized outer shell blank 50 is placed in an activation liquid to process the sheet 60 and the joint. A precious metal film is formed on the surface of the frame 70; finally, the outer shell blank 50 is placed in a solution composed of copper sulfate or the like, and a chemical reaction is performed at a normal temperature to reduce the metal ions in the solution to metal, and deposit on the surface of the assembly 60 and the connecting frame 70. Forming a metal conductive film.

The pre-treated outer casing blank 50 is electroplated by fixing the pre-treated outer casing blank 50 to a hanger by the first connecting frame 702 and the third connecting frame 706, and the hanging device can simultaneously fix the plurality of hangers The outer shell blank 50 can be used for electroplating of a plurality of outer shell blanks. The rack is connected to the cathode and immersed in a plating tank containing a metal ion plating solution, and a metal rod connecting anode is immersed in the plating solution. reaction. Since the multi-array 60 of the outer casing blank 50 is connected by the connecting frame 70, and the surface of the multi-array 60 and the connecting frame 70 is covered with a metal conductive film, the connecting piece 60 and the connecting frame 70 form a passage. Metal ions are attached to the surface of the panel 60 and the connecting frame 70 by the plating current, so that the surface of the panel 60 and the connecting frame 70 have a metallic luster.

After the electroplating is completed, the connection frame 70 is removed to form a plating process to complete the electroplating process.

Since the non-connected multi-array sheets 60 on the outer casing blank 50 are connected by a plurality of connection frames 70 connected to the energization function to form a passage, the electroplating process of the multi-array sheet 60 can be completed at one time during the reaction in the plating solution, thereby The processing steps are reduced, and the gloss of the composite array sheet 60 on a casing 80 is uniform to ensure the quality of the appearance of the product. In addition, in the electroplating process, since the connecting frame 70 serves as a hook, the outer casing blank 50 is directly fixed to the hanger, eliminating the need for additional hooks, thereby reducing the number of manufacturing processes.

It can be understood that, according to the needs of the decoration of the outer casing, the number of the pieces is not limited to four, so the number of the connection frames as the connection portion also changes accordingly.

It can be understood that different plating solutions, such as a chrome plating solution, a copper plating solution, etc., can be used according to different color requirements of the plating portion of the outer casing.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and those skilled in the art will be able to make equivalent modifications or changes in accordance with the spirit of the present invention. It should be covered by the following patent application.

Shell blank. . . 50

Matrix. . . 501

Component. . . 60

The first group of films. . . 602

The second group of films. . . 604

The third group of films. . . 606

The fourth group of films. . . 608

Connector. . . 70

The first connection box. . . 702

The second connection box. . . 704

The third connection box. . . 706

shell. . . 80

1 is a perspective view of one direction of a blank of the outer casing; FIG. 2 is a perspective view of the outer direction of the blank of the outer casing; FIG. 3 is a three-dimensional schematic view of the outer casing;

Shell blank. . . 50

Matrix. . . 501

The first group of films. . . 602

The second group of films. . . 604

The fourth group of films. . . 608

The first connection box. . . 702

The second connection box. . . 704

Claims (9)

A method of manufacturing a casing, comprising: forming a casing blank, comprising a base body, wherein the base body is provided with at least two components and at least one connecting member, the connecting member connecting the components; Pre-treating with the component to attach a conductive material thereon; electroplating to form a plating layer on the component; removing the connector. The manufacturing method of the outer casing according to claim 1, wherein the base body, the assembly and the connecting member are integrally formed. The manufacturing method of the outer casing according to claim 2, wherein the base body, the assembly and the connecting member are integrally molded by being shot by a two-shot injection molding machine. The method of manufacturing the outer casing according to claim 1, wherein the substrate is a polycarbonate material, and the component and the connecting member are acrylonitrile-butadiene-styrene materials. The method of manufacturing the outer casing according to claim 1, wherein the pretreatment comprises steps of washing, surface roughening, sensitization, and electroless plating. The manufacturing method of the outer casing according to claim 1, wherein the component comprises a first group, a second group, a third group and a fourth group, the first group, the second group and the first Three sets of sheets are formed on the outer peripheral wall of the long side of the base body, and a fourth set of sheets is formed on the upper part of the upper surface of the base body, and is parallel with the peripheral wall of the short side of the base body, and the two ends of the fourth set of sheets are It extends downward and cooperates with the outer peripheral wall of the base. The method of manufacturing the outer casing according to the first aspect of the invention, wherein the connecting member comprises a first connecting frame, a second connecting frame and a third connecting frame, wherein the first connecting frame is connected to the fourth group of pieces and the first group of pieces, The second connection frame connects the first group of sheets and the second group of sheets, and the third connection frame connects the third group of sheets and the fourth group of sheets, the connecting members are respectively connected to the ends of the components and protrude perpendicularly The surface below the substrate. The method of manufacturing the outer casing according to claim 1, wherein the connecting member fixes the outer casing blank to a hanger during electroplating. An outer casing made by the method for manufacturing an outer casing according to any one of claims 1 to 8, comprising: a base; a plurality of components, the component being disposed on the base, wherein the plurality of components are covered with a surface Plating.