CN115591750A - Method and system for coloring a rim surface - Google Patents
Method and system for coloring a rim surface Download PDFInfo
- Publication number
- CN115591750A CN115591750A CN202110717951.0A CN202110717951A CN115591750A CN 115591750 A CN115591750 A CN 115591750A CN 202110717951 A CN202110717951 A CN 202110717951A CN 115591750 A CN115591750 A CN 115591750A
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- Prior art keywords
- rim
- coating layers
- laser
- coloring
- coating
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000004040 coloring Methods 0.000 title claims abstract description 30
- 238000012545 processing Methods 0.000 claims abstract description 75
- 239000011247 coating layer Substances 0.000 claims abstract description 66
- 239000010410 layer Substances 0.000 claims description 27
- 239000003973 paint Substances 0.000 claims description 18
- 239000011248 coating agent Substances 0.000 claims description 16
- 238000000576 coating method Methods 0.000 claims description 16
- 238000004381 surface treatment Methods 0.000 claims description 12
- 238000003754 machining Methods 0.000 claims description 11
- 230000003287 optical effect Effects 0.000 claims description 9
- 239000011241 protective layer Substances 0.000 claims description 5
- 239000003086 colorant Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 238000010147 laser engraving Methods 0.000 description 4
- 239000002519 antifouling agent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007517 polishing process Methods 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
- B05D5/065—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects having colour interferences or colour shifts or opalescent looking, flip-flop, two tones
- B05D5/066—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects having colour interferences or colour shifts or opalescent looking, flip-flop, two tones achieved by multilayers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
- B05C9/12—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation being performed after the application
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/007—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/362—Laser etching
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The present invention relates to a method of colouring the surface of a rim and a system for carrying out the method. The method comprises the following steps: forming a plurality of coating layers stacked on the surface of the rim, the plurality of coating layers being different in color from each other; and performing laser processing on the plurality of coating layers in the direction from the plurality of coating layers to the surface of the rim to remove the laser-irradiated parts of the coating layers and to retain the laser-unirradiated parts of the coating layers. Thus, the color of the rim can be determined by changing the processing depth of the laser beam.
Description
Technical Field
The invention relates to a wheel rim processing technology, in particular to a method and a system for coloring the surface of a wheel rim.
Background
The conventional way to color the surface of the rim is to perform a rough polishing process on the surface of the rim, and then fill the depressions or scratches on the surface of the rim. Then, after a colored paint layer with the color to be shown is formed on the filled surface, a layer of protective paint is laid on the colored paint layer, and the colored paint layer and the part of the protective paint positioned in the preset pattern are removed by utilizing a laser engraving technology so as to reserve the part outside the preset pattern and expose the surface of the wheel ring corresponding to the inside of the preset pattern. Then, the remaining portion is subjected to a fine polishing process, and the surface of the rim exposed in the predetermined pattern is subjected to a fine polishing process. Finally, a layer of protective paint is laid within the processing range. However, such a coloring process not only can apply one color to the rim, but the processes of fine polishing and fine polishing can damage the edges of the patterned colored paint layer to a greater or lesser extent, resulting in a situation where the final formed pattern is rough.
In order to make the rim appear in more colors, a coloring method has been developed, which requires laser engraving of each layer of colored paint after it is applied, and repeating such a process. However, such an approach, while allowing the rim to appear in multiple colors, is time consuming.
Disclosure of Invention
Accordingly, it is a primary object of the present invention to provide a method and system for coloring a surface of a rim to determine a plurality of colors to be presented on the rim by varying a processing depth of a laser beam.
The present invention provides, in accordance with one embodiment, a method for coloring a surface of a wheel rim, comprising: forming a plurality of coating layers stacked on the surface of the rim, the plurality of coating layers being different in color from each other; and performing laser processing on the plurality of coating layers to remove the parts of the coating layers irradiated by the laser beam and to reserve the parts of the coating layers not irradiated by the laser beam.
In another embodiment of the method, the coloring result of the rim surface is determined by the processing depth of the laser processing on the plurality of coating layers.
In yet another embodiment of the method, the processing depth of the laser processing on the plurality of coating layers is determined by at least one of optical power and irradiation time of the laser processing, and the at least one of optical power and irradiation time is different depending on characteristics of each of the coating layers.
In yet another embodiment of the method, the method further comprises, prior to the laser machining the plurality of coating layers: a shielding cover is overlapped on the surface of the wheel rim, so that the coating layers are positioned between the shielding cover and the surface of the wheel rim. The shielding cover comprises at least one hollow pattern. Therefore, the step of performing the laser processing on the plurality of coating layers includes performing the laser processing on the plurality of coating layers within the range of each hollow pattern in the direction from the shielding cover to the surface of the rim.
In still another embodiment of the method, the shape of the spot of the laser light irradiated on the coating layer is variable.
In yet another embodiment of the method, the laser machining is performed by Computer Numerical Control (CNC) techniques.
In yet another embodiment of the method, after laser machining the plurality of coating layers, the method further comprises forming a protective layer on each of the exposed coating layers.
Also, the present invention provides, in accordance with an embodiment, a system for coloring a surface of a wheel, the system comprising: a first coating device; a laser device; and a processor electrically connected to the first coating device and the laser device for executing the above method to control the first coating device to form the plurality of coating layers on the surface of the rim and to control the laser device to perform the laser processing on the plurality of coating layers.
In another embodiment of the system, the system further comprises: and the surface treatment device is electrically connected with the processor, and the processor controls the surface treatment device to carry out surface treatment on the surface of the rim.
In yet another embodiment of the system, the system further comprises: and the processor controls the second coating device to form a protective layer on each exposed coating layer.
In yet another embodiment of the system, the system further comprises: a shielding cover supply module electrically connected with the processor, wherein the processor controls the shielding cover supply module to provide a shielding cover containing at least one hollow pattern, so that the shielding cover is overlapped on the surface of the wheel rim, the coating layers are positioned between the shielding cover and the surface of the wheel rim, and the laser device carries out laser processing on the coating layers within the range of the hollow pattern.
In addition, in another embodiment of the method, before the forming the plurality of coating layers stacked on the rim surface, the method further includes performing a surface treatment on the rim surface.
Therefore, the method and the system for coloring the surface of the wheel rim provided by the invention define a plurality of colors to be presented on the wheel rim by stacking the coating layers of a plurality of colors on the surface of the wheel rim one by one. And planning the processing depth and path of the laser processing according to the preset pattern, so that the color of the coating layer exposed in the processing area is the color to be presented on the rim. Therefore, the processing efficiency and precision are improved, and the surface of the rim can be prevented from being damaged.
Drawings
Other aspects of the invention and its advantages will be found after studying the detailed description in conjunction with the following drawings:
FIG. 1 is a functional block diagram of a system for coloring a surface of a wheel according to one embodiment of the present invention;
FIG. 2 is a flow chart of a method of coloring a surface of a wheel according to one embodiment of the present invention;
FIG. 3 is a cross-sectional view of a rim after being surface coated according to an embodiment of the present invention, showing a plurality of coating layers stacked on the surface of the rim;
FIGS. 4A-4C are schematic diagrams of a process for laser machining a system for coloring a surface of a rim using a shadow mask according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view of a laser machined rim for displaying different machining depths to determine different colors on the rim according to one embodiment of the present invention;
FIG. 6 is a top view of FIG. 5, showing the laser machined rim having a visually different color; and
FIG. 7 is a functional block diagram of a system for coloring a surface of a rim in accordance with another embodiment of the present invention.
Wherein:
1, a processor;
2, a surface treatment device;
3, a coating device;
4, a laser device;
5, a coating device;
6, a shielding cover supply module;
61, a shielding cover;
611, hollowing out the patterns;
7, image shooting equipment;
100, a rim;
110, the rim surface;
210,220,230, a coating layer;
h1, H2 and H3 are the processing depth;
NP is a non-processed region;
PT, processing patterns;
r1, R2 and R3 are machining areas.
Detailed Description
Referring to fig. 1-6, a system for coloring a surface of a rim according to one embodiment of the present invention is adapted to color a rim 100 of a tire. The system mainly comprises a processor 1, a surface treatment device 2, two coating devices 3 and 5, a laser device 4 and a mask supply module 6. The processor 1 may be, for example but not limited to, a processor of a host computer, and may be electrically connected to the surface treatment device 2, the coating devices 3 and 5, the laser device 4, and the mask supply module 6, and configured to control these devices to perform the coloring method of fig. 2.
First, the surface treatment of step S10 is performed, i.e. the processor 1 controls the surface treatment device 2 to polish the rim surface 110 of the rim 100 to make it rough for the subsequent color material to adhere.
Next, step S12 is executed, and the processor 1 controls the coating device 3 (first coating device) to stack the plurality of coating layers 210 to 230 one by one on the rim surface 110, as shown in fig. 3. The colors of the paint layers 210 to 230 are different from each other, for example, but not limited to, the color of the paint layer 210 is white, the color of the paint layer 220 is blue, and the color of the paint layer 230 is red.
After all the coating layers have been formed on the rim surface 110, step S14 can be performed, i.e., a shadow mask is disposed on the rim 100. In detail, the mask supplying module 6 includes a moving mechanism (not shown) and at least one mask 61. The processor 1 may control the mask supplying module 6 to move a mask 61 to a position where the rim 100 is located by the moving mechanism of the mask supplying module 6, and to overlap the mask 61 on the rim surface 110 to be colored on the mask 61, so that the coating layers 210 to 230 are located between the mask 61 and the rim surface 110, as shown in fig. 4A to 4B. Each of the masks 61 includes at least one hollow 611 (for example, the mask 61 shown in fig. 4A has a hollow 611). The shape and size of the shielding cover 61 can be designed according to the shape and size of the rim 100, and the hollow patterns 611 on the shielding cover 61 can also be designed according to a predetermined pattern (i.e., the pattern to be shown on the rim surface 110), as long as the positions of the hollow patterns 611 can correspond to the positions to be colored on the rim surface 110. The number of the mask covers 61 may be determined according to the color or (and) the complexity of the pattern of the predetermined pattern and the progress of the coloring process.
Next, step S16 is executed, in which the processor 1 plans the processing depth and path of the laser processing by using the CNC technology, based on the predetermined pattern, and controls the laser device 4 (e.g., the laser engraving machine) to start from the coating layer 230 located at the uppermost layer (i.e., the coating layer farthest from the rim surface 110) to shield the cover 61 toward the rim surface 110, and laser processes (e.g., laser engraving) the coating layers 210 to 230 layer by layer within the range of the hollow pattern 611 (i.e., the processing region of the laser light) based on the planned processing depth and path, so as to remove the portion irradiated by the laser light on each coating layer, and leave the portion not irradiated, and form a processing pattern PT on the rim surface 110, as shown in fig. 4C, 5 and 6. Further, as the processing depth of the laser beam is varied, the coating layers corresponding to the processing region (i.e., the irradiation region) are exposed. Thus, the color of the coating layer which is left corresponding to the laser light irradiation region becomes a color which is visually observed. For example, there are three processing regions of the predetermined laser beam, which are the processing regions R1 to R3 shown in fig. 5 and fig. 6, respectively, and the processing depth of the predetermined corresponding processing region R1 is H1, the processing depth of the corresponding processing region R2 is H2, the processing depth of the corresponding processing region R3 is H3, the processing depth H1 is smaller than the processing depth H2, and the processing depth H2 is smaller than the processing depth H3; in this case, the paint layer 220 corresponding to the machining region R1 and the paint layer 210 corresponding to the machining region R2 become visible portions. In addition, in this example, the remaining areas (i.e., the unprocessed areas NP) of the uppermost paint layer 230 except for the processed areas R1 to R3 may remain as unprocessed, and the paint layer 210 corresponding to the processed area R3 is completely removed to expose the rim surface 110, so that the paint layer 230 and the exposed rim surface 110 in the unprocessed areas NP may also be visible portions. In the example, when the color of the rim surface 110 is silver, the color of the paint layer 210 is white, the color of the paint layer 220 is blue, and the color of the paint layer 230 is red, the blue color in the processed region R1, the white color in the processed region R2, the silver color in the processed region R3, and the red color in the unprocessed region NP are observed on the rim after laser processing, as shown in fig. 6. After the laser processing is completed, the processor 1 controls the mask supplying module 6 to remove the mask 61, and the processing pattern PT corresponding to the predetermined pattern appears on the rim surface 110, as shown in fig. 4C.
Finally, step S18 is executed, and the processor 1 controls the coating device 5 (second coating device) to form a protective layer on each exposed coating layer by, for example, but not limited to, spraying or soaking, so that the color on the rim 100 can be better preserved.
In the present invention, if the rim to be colored is a rim that has been subjected to surface processing, the step S10 can be omitted.
In the present invention, the processing depth of the laser can be designed according to the color to be presented, and the design method can be, for example, to achieve different processing depths by changing the optical power of the laser light under the same processing time, or to achieve different processing depths by changing the processing time under the same optical power, or to change the optical power and/or processing time with different characteristics of each coating layer under the same processing depth; however, the present invention is not limited thereto.
In addition, the present invention can be used in conjunction with an Automatic Optical Inspection (AOI) technique to feed back laser processing results in real time, so as to be used as a basis for adjusting processing parameters (such as, but not limited to, optical power, processing time, processing path, etc.) of a light source (i.e., laser light), thereby achieving high-efficiency and high-precision processing. Specifically, as shown in fig. 7, the system of the present invention may further include an image capturing device 7 electrically connected to the processor 1, wherein the image capturing device 7 may be, for example, but not limited to, a video camera. The processor 1 controls the image shooting device 7 to shoot the laser beam to process on each coating layer in real time, and receives the real-time shooting result from the image shooting device 7 to analyze the image and adjust the processing parameters according to the analysis result.
In the present invention, the energy density of the laser beam can be adjusted by adjusting the size or shape of the spot, and the light energy required for different materials (i.e. the material of the rim and the material of each coating layer) is different, so the shape of the spot of the laser beam irradiated on the coating layer can be designed according to the actual requirement, and even can be adjusted in real time. For example, AOI techniques may be used to adjust the length or (and width) of the spot, such as but not limited to a linear spot or other shaped spot from a point spot, depending on the location to which the laser is directed, the desired pattern (i.e., the pattern to be machined on each coating layer), and the material of the coating layer being laser machined.
In summary, the present invention provides a method and system for coloring a rim surface by using laser processing instead of turning tools and milling tools to remove unwanted areas in a coating layer, thereby preventing the turning tools and milling tools from damaging the rim surface during the processing. And, by stacking the coating layers of multiple colors on the surface of the rim one by one, the multiple colors to be presented on the rim are defined at one time. And planning the processing depth and path of the laser processing according to the preset pattern, so that the color of the coating layer exposed in the processing area is the color to be presented on the rim, thereby improving the processing efficiency and accuracy. Moreover, by adjusting the laser spot or/and the processing parameter in real time, the processing precision can be improved more greatly, and the formed pattern is more ideal.
Although the present invention has been described with reference to the above embodiments, the invention is not limited to the embodiments. Variations, modifications, and combinations of the various embodiments of the invention can be made without departing from the spirit and scope of the invention as defined by the appended claims. For the protection defined by the present invention, reference should be made to the appended claims.
Claims (10)
1. A method of coloring a surface of a wheel, comprising:
forming a plurality of coating layers stacked on the surface of the rim, the plurality of coating layers being different in color from each other; and
and performing laser processing on the plurality of coating layers to remove the parts of the coating layers irradiated by the laser beams and to reserve the parts of the coating layers not irradiated by the laser beams.
2. The method as claimed in claim 1, wherein the coloring result of the rim surface is determined by the processing depth of the laser processing on the plurality of coating layers.
3. The method of coloring a rim surface according to claim 2, wherein the processing depth of the laser processing on the plurality of coating layers is determined by at least one of an optical power and an irradiation time of the laser processing, and the at least one of the optical power and the irradiation time is different depending on a characteristic of each of the coating layers.
4. The method of coloring a surface of a wheel rim as claimed in claim 1, further comprising, prior to said laser machining said plurality of painted layers:
and overlapping a shielding cover on the surface of the wheel rim so as to enable the coating layers to be positioned between the shielding cover and the surface of the wheel rim, wherein the shielding cover comprises at least one hollow pattern, and the laser processing of the coating layers comprises the step of carrying out the laser processing on the coating layers in the range of each hollow pattern in the direction from the shielding cover to the surface of the wheel rim.
5. The method of coloring a surface of a wheel rim as claimed in claim 1, wherein a spot shape of the laser light irradiated on the painted layer is variable.
6. The method of coloring a surface of a wheel rim as claimed in claim 1, wherein the laser machining is performed by a computer numerical control technique.
7. The method of coloring a wheel rim surface according to claim 1, wherein the method further comprises surface treating the wheel rim surface before forming the plurality of paint layers stacked on the wheel rim surface.
8. The method of coloring a rim surface according to claim 1, further comprising forming a protective layer on each of the exposed painted layers after laser machining the painted layers.
9. A system for coloring a surface of a wheel, comprising:
a first coating device;
a laser device; and
a processor electrically connected to the first coating device and the laser device, for performing the method of coloring the surface of the rim according to any one of claims 1 to 3 and 5 to 6, so as to control the first coating device to form the plurality of coating layers on the surface of the rim, and control the laser device to perform the laser processing on the plurality of coating layers.
10. A system for coloring an apron surface according to claim 9, characterized in that it further comprises:
a shielding cover supply module electrically connected with the processor, wherein the processor controls the shielding cover supply module to provide a shielding cover containing at least one hollow pattern, so that the shielding cover is overlapped on the surface of the wheel rim, the coating layers are positioned between the shielding cover and the surface of the wheel rim, and the laser device performs the laser processing on the coating layers within the range of each hollow pattern;
the surface treatment device is electrically connected with the processor, and the processor controls the surface treatment device to carry out surface treatment on the surface of the rim; and
and the processor controls the second coating device to form a protective layer on each exposed coating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110717951.0A CN115591750A (en) | 2021-06-28 | 2021-06-28 | Method and system for coloring a rim surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110717951.0A CN115591750A (en) | 2021-06-28 | 2021-06-28 | Method and system for coloring a rim surface |
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| Publication Number | Publication Date |
|---|---|
| CN115591750A true CN115591750A (en) | 2023-01-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110717951.0A Pending CN115591750A (en) | 2021-06-28 | 2021-06-28 | Method and system for coloring a rim surface |
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| CN (1) | CN115591750A (en) |
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|---|---|---|---|---|
| US5824374A (en) * | 1996-07-22 | 1998-10-20 | Optical Coating Laboratory, Inc. | In-situ laser patterning of thin film layers during sequential depositing |
| US6169266B1 (en) * | 1998-03-25 | 2001-01-02 | Xirom, Inc. | Etching of multi-layered coated surfaces to add graphic and text elements to an article |
| CN101670742A (en) * | 2008-09-09 | 2010-03-17 | 比亚迪股份有限公司 | Sheet material, method for manufacturing same and product shell |
| TW201041755A (en) * | 2009-05-27 | 2010-12-01 | Foxconn Tech Co Ltd | Housing and method for making the same |
| TW201121692A (en) * | 2009-12-18 | 2011-07-01 | Euclid Technology Co Ltd | Laser cutting system for wafer. |
| CN105214911A (en) * | 2015-09-25 | 2016-01-06 | 惠州Tcl移动通信有限公司 | Realize method and the plastic shell of double-colored male and fomale(M&F) |
| CN109048073A (en) * | 2018-09-05 | 2018-12-21 | 深圳光韵达激光应用技术有限公司 | A kind of laser ablation production method applied to mesh products |
| CN112025210A (en) * | 2019-07-11 | 2020-12-04 | 健信科技工業股份有限公司 | Method for processing wheel rim surface by laser engraving |
-
2021
- 2021-06-28 CN CN202110717951.0A patent/CN115591750A/en active Pending
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|---|---|---|---|---|
| US5824374A (en) * | 1996-07-22 | 1998-10-20 | Optical Coating Laboratory, Inc. | In-situ laser patterning of thin film layers during sequential depositing |
| US6169266B1 (en) * | 1998-03-25 | 2001-01-02 | Xirom, Inc. | Etching of multi-layered coated surfaces to add graphic and text elements to an article |
| TW531692B (en) * | 1998-03-25 | 2003-05-11 | Xircom Inc | Etching of multi-layered coated surfaces to add graphic and text elements to an article |
| CN101670742A (en) * | 2008-09-09 | 2010-03-17 | 比亚迪股份有限公司 | Sheet material, method for manufacturing same and product shell |
| TW201041755A (en) * | 2009-05-27 | 2010-12-01 | Foxconn Tech Co Ltd | Housing and method for making the same |
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| CN105214911A (en) * | 2015-09-25 | 2016-01-06 | 惠州Tcl移动通信有限公司 | Realize method and the plastic shell of double-colored male and fomale(M&F) |
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Application publication date: 20230113 |