CN103255461B - Form the treatment process of compound surface - Google Patents
Form the treatment process of compound surface Download PDFInfo
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- CN103255461B CN103255461B CN201210037414.2A CN201210037414A CN103255461B CN 103255461 B CN103255461 B CN 103255461B CN 201210037414 A CN201210037414 A CN 201210037414A CN 103255461 B CN103255461 B CN 103255461B
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- 238000000034 method Methods 0.000 title claims abstract description 70
- 230000008569 process Effects 0.000 title claims abstract description 48
- 150000001875 compounds Chemical class 0.000 title claims abstract description 20
- 238000007743 anodising Methods 0.000 claims abstract description 46
- 238000003754 machining Methods 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 6
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000004411 aluminium Substances 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 claims description 18
- 230000000694 effects Effects 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 15
- 229910000838 Al alloy Inorganic materials 0.000 claims description 8
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- 238000005554 pickling Methods 0.000 claims description 6
- 238000002203 pretreatment Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims 1
- 238000004040 coloring Methods 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 208000019901 Anxiety disease Diseases 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000036506 anxiety Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- MQRWBMAEBQOWAF-UHFFFAOYSA-N acetic acid;nickel Chemical compound [Ni].CC(O)=O.CC(O)=O MQRWBMAEBQOWAF-UHFFFAOYSA-N 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229940078494 nickel acetate Drugs 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
The treatment process forming compound surface comprises the following steps: provide a workpiece, and this workpiece is the metal shell containing aluminium, and it comprises an outside surface and an internal surface; Machining process is carried out to this workpiece; Form a fixed part in the internal surface of this workpiece, and form at least one electrodes conduct hole in this fixed part, first time anodizing is carried out to this workpiece, with after the oxide film of this workpiece surface formation tool first color, again in mach mode, remove the partial oxide film of this fixed part, and remove the partial oxide film of this outer surface of workpiece; Second time anodizing is carried out to this workpiece, forms the oxide film of tool second color with the position of removing oxide film at this outer surface of workpiece; Finally, this fixed part is removed.This treatment process obtains the oxide film of different color in the surface of metal works.
Description
Technical field
The invention relates to a kind for the treatment of process forming compound surface, refer to that one utilizes repeatedly anode processing technique especially, on the surface of workpiece, form multiple color or surface effect.
Background technology
Portable electric product is very universal now, such as mobile phone, personal digital assistant, computer etc.Human consumer more and more focuses on its outward appearance, and therefore the housing of various electronic product has the surface, particularly metallic surface of light usually, usually applies with multiple processing means, makes it have attracting smooth-flat-surface and gloss.
For look on the surface of the housing, technology known at present utilize anodic oxidation in metallic surface colorific method.This kind of mode is only limitted to solid color, cannot colorificly change.
The existing oxide film utilizing anode processing technique to obtain different color in the surface of metal shell, has and adopts repeatedly anodizing and repeatedly painted method.Common mode is that cover position not to be processed, after carrying out anodizing, then remove hovel, the handling procedure of this kind of technique is comparatively loaded down with trivial details to cover the mode of ink before each anodizing, and needs extra to cover expense, causes cost to increase.
Existing another kind forms two kinds of colors in the method for same housing, is between the anodic oxidation of twice, processes the first time oxide film to remove local to the outside surface of housing, then passes through second time anodizing to form the oxide film of the second color.For solving the anodised energising problem of second time, a kind of feasible mode is that the internal surface of worn housing is for electrodes conduct, but this kind of method is when worn housing, thickness is wayward, easy injury housing, if oxide film is completely not worn, easily affect conduction, and then the anodised effect of impact second time.In addition, to carry out the third color, also needing again the internal surface of worn housing, increasing again the probability of injury housing.
Therefore how producing multiple color on the surface of housing is the problem that industry is looked forward to wanting to solve.
Therefore, improving of the present inventor's thoughts the problems referred to above is concentrate on studies and coordinate the utilization of scientific principle, and proposes a kind of reasonable in design and effectively improve the present invention of the problems referred to above.
Summary of the invention
Object of the present invention, be to provide a kind for the treatment of process forming compound surface, utilize the fixed position of the processing machine of workpiece configurations, the conducting position of electrode in anodizing process is provided, to utilize anode processing technique in the oxide film of the surface of metal works acquisition different color.
In order to above-mentioned purpose, according to the solution of the present invention, a kind for the treatment of process forming compound surface is provided, comprises the following steps:
There is provided a workpiece, this workpiece is the metal shell containing aluminium, and it comprises an outside surface and an internal surface;
Machining process is carried out to this workpiece;
Form a fixed part in the internal surface of this workpiece;
Form at least one electrodes conduct hole in this fixed part;
First time anodizing is carried out to this workpiece, electrode pin is contacted with the position that this fixed part removes oxide film, to form the oxide film of tool first color at this workpiece surface;
Remove the partial oxide film of this fixed part;
Remove the oxide film of the part of this outer surface of workpiece;
Second time anodizing is carried out to this workpiece, electrode pin is contacted with the position that this fixed part removes oxide film, form the oxide film of tool second color with the position of removing oxide film at this outer surface of workpiece; And remove this fixed part.
The present invention has following beneficial effect: the present invention can utilize the fixed part being positioned at work piece inner surface, provides the conducting position of electrode in anodizing process.This process can guarantee the energising effect of second time anodizing, does not need the internal surface of worn workpiece, and process velocity is very fast, the anxiety that workpiece does not damage.After excision fixed part, the outward appearance of workpiece is not impacted.
In order to technology, method and effect that the present invention takes for reaching set object further can be understood, refer to following detailed description for the present invention, graphic, believe object of the present invention, feature and feature, when being goed deep into thus and concrete understanding, but institute's accompanying drawings and annex be only provide with reference to and illustrate use, be not used for being limited the present invention.
Accompanying drawing explanation
Fig. 1 is the schema of the treatment process of formation compound surface of the present invention.
Fig. 2 is the schematic diagram that workpiece of the present invention forms fixed part.
Fig. 3 is the schematic diagram in the fixed part formation electrodes conduct hole of workpiece of the present invention.
Fig. 4 is the schematic diagram of workpiece of the present invention excision fixed part.
Wherein, description of reference numerals is as follows:
Workpiece 10
Opening 11,13
Fixed part 12,14
Electrodes conduct hole 120,140,120 ', 140 '
Embodiment
Please refer to Fig. 1, is the schema of the treatment process of formation compound surface of the present invention.First, as step S21, provide workpiece, workpiece can be the metal shell containing aluminium, as aluminum or aluminum alloy, to be applicable to anode processing technique.
Such as, for making workpiece tool external form in need, the casing of electronic product, as shown in step S22, machining process is carried out to this workpiece.Machining process herein can comprise various work program, and more common precision sizing is treated to the processing treatment that computer numerical controls (Computer Numerical Control, CNC).After utilizing the internal memory of programmed instruction input digital control system of Numerical Control, calculate via computer compiling, by displacement control system, information is reached driving mechanism with the stroke of CD-ROM drive motor, carry out the part designed by machining.Aforementioned machines processing treatment, can further include surface effect process.
After completing, as shown in Figure 2, be the example schematic of workpiece 10 of the present invention, this workpiece 10 comprises an outside surface and an internal surface, and outside surface is as the appearance surfaces of electronic housings, and internal surface is near the internals of electronic product.Special instruction, treatment process of the present invention is not restricted to the housing of electronic product.
Then, as shown in step S23, form a fixed part 12 on this workpiece 10, this fixed part 12 is controlled the fixing position of (CNC) processing machine as computer numerical by the present embodiment, and the quantity of this fixed part is not limited to one, can be one or more.Two fixed parts 12 and 14 are provided with in the present embodiment.Fixed part 12,14 is mainly arranged at the internal surface of workpiece 10, when machining and excise, can't affect the outward appearance of workpiece 10.What illustrate is, fixation portions 12 can be before the step S22 this workpiece being carried out to machining process, the position that the first step first completes, afterwards with the fixed part 12,14 of CNC processing machine fixation workpiece 10 to carry out the cutting forming of workpiece or to carry out the surface effect process of workpiece 10 further.In other words, the order of step S22 and step S23 be can mix and in no particular order order, in other words, both steps can be considered as the different details steps in same flow process.
As step S24, form electrodes conduct hole in this fixed part.Coordinate as shown in Figure 2, the present embodiment preferably forms pair of electrodes conductive hole 120 in this fixed part 12, and another to electrodes conduct hole 140 in this fixed part 14.What the generation type in above-mentioned electrodes conduct hole was easier is boring, and its quantity can be at least one, and main function is for energising during first time anodizing and fixes.In the present embodiment, workpiece 10 arranges opening 11,13 further, and fixed part 12,14 lays respectively at opening 11,13, but above-mentioned opening 11,13 is omissible in response to different housings shape.
Before the step S25 carrying out this anodizing, for the housing of electronic product, the present invention also comprises and carries out pre-treatment to this workpiece 10 first time.Pre-treatment program can be comprise de-ester (degreasing), alkali cleaning (Alkaline etching), first time pickling (first pickling), chemical rightenning (chemical polishing) and the second time pickling sub-process such as (second pickling), wherein sub-process number of processes depending on Al alloy parts specification of quality and determine.Comprise at least one washing process after each sub-process, washing process can be one to five road, is preferably two roads, to remove the residual chemical agent of last road sub-process or impurity.The parameter area of each sub-process, please refer to following table.
Table 1, pre-treatment of the present invention each line process parameter table
In fact look the situation of aluminium alloy itself and the occasion of application, above-mentioned each sub-process can adjust.The present invention is for the housing of electronic product, and through contriver's repeatedly test and evaluation, the better parameter of suggestion pre-treatment each road sub-process is as following table.
Each road sub-process preferred parameters table of table 2, pre-treatment
By the time, after clean Al alloy parts completes, namely this Al alloy parts is applicable to carrying out lower one flow process, that is as shown in step 25, anodizing for the first time.Anodizing is Al alloy parts 10 is placed in electrolyzer and is connected to anode, and negative electrode then connects carbon plate or stereotype, then applies certain voltage and electric current.Carry out first time anodizing to this workpiece 10, object forms the oxide film of tool first color on this workpiece 10 surface.
In the present embodiment this first time anodizing, can be 15 to 25 degrees Celsius in temperature, be soaked in by this workpiece 10 in the anodizing solution containing 20% to 25% sulfuric acid concentration, between voltage is 10 to 16 volts, current density is 0.8 to 2.0A/dm
2between (ampere/every square centimeter), the treatment time is less than 45 minutes.The preferred process time is at least 30 minutes.
For the first time after anodizing, first time coloring treatment can be carried out for this oxide film, make the oxide film after first time anodizing have the first color.Coloring treatment can be adsorption coloring for the first time, or chemical stain.Then, be structure pollution resistance and the corrosion resistance of oxidation reinforced film, the present invention carries out sealing of hole (Sealing) flow process, and the operating method of sealing of hole is for using acetic acid ni-type hole sealing agent.The feasible parameter area of sealing of hole flow process of the present invention is as shown in table 3 below.
The parameter area of table 3, sealing of hole flow process of the present invention
Above-mentioned sealing of hole advises that preferably parameter is, this workpiece 10 is soaked in the hole sealing agent that concentration is 7g/L, and temperature is 90 ± 5 degrees Celsius, and the time is 30 minutes.
A kind of transformable mode, the present invention, before the step S25 carrying out first time anodizing, may further include and carries out surface effect processing treatment, such as a sandblasting to this workpiece 10, to present the surface effect of cloudy surface, or meticulous hair stripe effect.
Refer to Fig. 3, the step S26 coordinating the present invention to continue, removes the partial oxide film of this fixed part.The present embodiment is preferably and controls this fixed part 12 and 14 of processing treatment of (Computer Numerical Control, CNC) with computer numerical, with the oxide film formed after partly removing first time anodizing.In more detail, the oxide film of the oxide film removing the inner edge, electrodes conduct hole of this fixed part 12 and the inner edge, electrodes conduct hole removing this fixed part 14, to form the electrodes conduct hole 120 ' and 140 ' that can conduct electricity again.The above-mentioned step removing oxide film, is preferably and holes process in the mode of reaming for this electrodes conduct hole, and main function is for energising during second time anodizing.The present invention, by electrodes conduct hole 120 ', 140 ', when second time anodizing, has preferably conductive effect.Another kind of feasible mode, if the area of fixed part allows, the present embodiment also can change into and form extra electrodes conduct hole further again in fixed part.
As the step S27 of Fig. 1, remove the partial oxide film of this workpiece 10 outside surface, expose unoxidized surface with this, for carrying out anodizing and form another kind of color next time.This step also can utilize the processing treatment mode as above-mentioned surface effect, such as meticulous hair stripe effect.
As the step S28 of Fig. 1, second time anodizing is carried out to this workpiece 10, electrode pin (not shown) is contacted with this electrodes conduct hole 120 ', 140 ' of this fixed part 12,14, forms the oxide film of tool second color with the position of removing oxide film at this workpiece 10 outside surface.Wherein this second time anodizing, can be 15 to 25 degrees Celsius Celsius in temperature, be soaked in by this workpiece 10 in the anodizing solution containing 20% to 25% sulfuric acid concentration, between voltage is 6 to 25 volts, the treatment time be 1 to 20 minute.
The sub-process of second time anodizing also comprises second time coloring treatment, and the oxide film that second time anodizing is generated has the color of the oxide film being different from first time anodizing.Second time coloring treatment can be adsorption coloring, or chemical stain.Then, carry out sealing of hole (Sealing) flow process, the operating method of sealing of hole works as hole sealing agent with nickel acetate, and treatment temp is 80 to 99 degrees Celsius, and the treatment time is 1 to 30 minute.Last and this workpiece is dried.
The present invention utilizes the fixed part of machining treating processes, as first and the energising position of reanodizing, does not need the internal surface of worn workpiece 10 to use for energising when second time anodizing.Utilize the mode of boring, handling ease, can determine to remove oxidized portion, guarantees the effect be energized.After finally machining, fixed part 12,14 can be removed, as shown in Figure 4.Because fixed part is located at the internal surface of workpiece 10, therefore do not affect overall outward appearance.
Finally, be the flow process of ash disposal, to remove the attachment ash shape thing on Al alloy parts surface, normally with acidic solution cleaning, then wash.Ash disposal process parameter scope of the present invention is as shown in table 4 below.
Table 4, ash disposal process parameter scope of the present invention
The present invention is the shell characteristics being suitable for electronic product, and wherein ash disposal flow process is preferably the nitric acid with concentration 20ml/L, temperature about 25 degrees Celsius process.Be still afterwards with washing at least two road of temperature about 25 degrees Celsius.
Be worth mentioning, the present invention, before removing this fixed part 12,14, can comprise further and form another electrodes conduct hole again, for carrying out third time anodizing program.In other words, as long as the area of this fixed part 12,14 is enough large, other electrodes conduct hole can be formed again.The present invention like this can repeat the step after above-mentioned steps S26 and S27, then forms the third color.
Or the present invention also may further include and carries out reaming for this electrodes conduct hole 120 ', 140 ', for carrying out third time anodizing program.As long as this kind of mode is with larger-diameter drill bit, then the energising that this electrodes conduct hole 120 ', 140 ' of brill mill can be again good is to carry out anodizing.Finally excise fixed part 12,14 again.
Therefore by the treatment process of formation compound surface of the present invention, there is feature described as follows and function.The present invention utilizes the fixed position of the processing machine of workpiece configurations, provides the conducting position of electrode in anodizing process, to utilize anode processing technique in the oxide film of the surface of metal works acquisition different color.Can guarantee the energising effect of second time anodizing in process, not need the internal surface of worn workpiece, process velocity is very fast, the anxiety that workpiece does not damage.Finally, excision fixed part, does not impact the outward appearance of workpiece.
But, the foregoing is only better possible embodiments of the present invention, non-ly therefore namely limit to the scope of the claims of the present invention, therefore the equivalence techniques change of such as using specification sheets of the present invention and graphic content to do, be all in like manner all included within the scope of the present invention, close and give Chen Ming.
Claims (11)
1. form a treatment process for compound surface, it is characterized in that, comprise the following steps:
There is provided a workpiece, this workpiece is the metal shell containing aluminium, and it comprises an outside surface and an internal surface;
Machining process is carried out to this workpiece;
Form a fixed part in the internal surface of this workpiece;
Form at least one electrodes conduct hole in this fixed part;
First time anodizing is carried out to this workpiece, to form the oxide film of tool first color at this workpiece surface;
Remove the partial oxide film of this fixed part, wherein remove the step of the partial oxide film of this fixed part, for removing the oxide film of this inner edge, electrodes conduct hole of this fixed part;
Remove the oxide film of the part of this outer surface of workpiece;
Second time anodizing is carried out to this workpiece, electrode pin is contacted with the position that this fixed part removes oxide film, form the oxide film of tool second color with the position of removing oxide film at this outer surface of workpiece; And
Remove this fixed part.
2. the treatment process forming compound surface as claimed in claim 1, is characterized in that, this fixed part is the processing machine fixed position that computer numerical controls.
3. the treatment process of the formation compound surface stated as claim 1, it is characterized in that, before carrying out this anodizing first time, also comprise and carry out pre-treatment to this workpiece, this pre-treatment comprises de-ester, alkali cleaning, first time pickling, chemical rightenning and second time pickling.
4. the treatment process forming compound surface as claimed in claim 1, is characterized in that, before the step of carrying out first time anodizing, comprises further and carries out a surface effect processing treatment to this workpiece.
5. the as claimed in claim 1 treatment process forming compound surface, is characterized in that, this first time anodizing current density be 0.8 to 2.0A/dm
2between, the treatment time is less than 45 minutes.
6. the as claimed in claim 1 treatment process forming compound surface, is characterized in that, before the step of carrying out second time anodizing, comprises further and removes region to this outer surface of workpiece and carry out a surface effect processing treatment.
7. the treatment process forming compound surface as claimed in claim 1, it is characterized in that, between this second time anodizing voltage is 6 to 25 volts, the treatment time is 1 to 20 minute.
8. the treatment process forming compound surface as claimed in claim 1, is characterized in that, anodizing and second time anodizing step include and carry out painted and sealing pores for this oxide film for the first time.
9. the as claimed in claim 8 treatment process forming compound surface, is characterized in that, above-mentioned sealing of hole comprises this Al alloy parts is soaked in the acetic acid ni-type hole sealing agent that concentration is 7g/L, and temperature is 90 ± 5 degrees Celsius, and the time is 30 minutes.
10. the treatment process forming compound surface as claimed in claim 1, is characterized in that, before removing this fixed part, comprise further and form another electrodes conduct hole again, for carrying out third time anodizing.
11. treatment processs forming compound surface as claimed in claim 1, is characterized in that, before removing this fixed part, comprise further and carry out reaming for this electrodes conduct hole, for carrying out third time anodizing.
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| CN201210037414.2A CN103255461B (en) | 2012-02-16 | 2012-02-16 | Form the treatment process of compound surface |
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| CN201210037414.2A CN103255461B (en) | 2012-02-16 | 2012-02-16 | Form the treatment process of compound surface |
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| CN103255461B true CN103255461B (en) | 2015-08-05 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI511843B (en) * | 2013-11-01 | 2015-12-11 | Taiwan Green Point Entpr Co | The surface treatment method of the metal product is processed by the method Of the metal products |
| CN104605695B (en) * | 2013-11-03 | 2017-09-15 | 邱莉 | Dark-red enameled pottery and its polishing process |
| CN105002544A (en) * | 2015-07-31 | 2015-10-28 | 广东欧珀移动通信有限公司 | Method for obtaining high-light logo after aluminum alloy anodic oxidation and aluminum alloy product |
| CN105880955A (en) * | 2016-04-11 | 2016-08-24 | 乐视控股（北京）有限公司 | Shell and preparation method and application thereof |
| CN105872154A (en) * | 2016-04-11 | 2016-08-17 | 乐视控股（北京）有限公司 | Shell, preparation method and application thereof |
| CN105904157A (en) * | 2016-04-11 | 2016-08-31 | 乐视控股（北京）有限公司 | Housing, and preparation method and application thereof |
| CN107127530A (en) * | 2017-06-14 | 2017-09-05 | 宇龙计算机通信科技(深圳)有限公司 | A kind of method for metal working, metal shell and mobile terminal |
| CN111954408B (en) | 2017-09-29 | 2022-02-22 | Oppo广东移动通信有限公司 | Shell manufacturing method, shell and electronic equipment |
| CN109811388A (en) * | 2019-03-27 | 2019-05-28 | 珠海市玛斯特恒新铝合金加工有限公司 | It is a kind of do not damage size Process on Aluminum Alloy Oxidation Film move back membrane process |
| CN110072043A (en) * | 2019-05-16 | 2019-07-30 | Oppo广东移动通信有限公司 | The housing unit and electronic equipment of electronic equipment |
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| CN102170763A (en) * | 2010-02-27 | 2011-08-31 | 比亚迪股份有限公司 | Metal housing with dermatoglyphy-texture surface and preparation method thereof |
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| TW200714750A (en) * | 2005-10-07 | 2007-04-16 | Ya Bo Entpr Corp | The method of coating the insulation film on aluminum shell of electrolyte capacitor by applying anodizing |
| US20090200175A1 (en) * | 2008-02-07 | 2009-08-13 | Yuan-Ting Chang | Multicolor anodizing treatment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1144852A (en) * | 1995-03-24 | 1997-03-12 | 本田技研工业株式会社 | Process for anodizing aluminum materials and application members whereby |
| JPH11181597A (en) * | 1997-10-17 | 1999-07-06 | Nippon Denki Kagaku Kogyosho:Kk | Surface treating method for aluminum |
| CN102170763A (en) * | 2010-02-27 | 2011-08-31 | 比亚迪股份有限公司 | Metal housing with dermatoglyphy-texture surface and preparation method thereof |
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