CN110154378A - The cambered shell manufacturing method of 3C electronic device - Google Patents
The cambered shell manufacturing method of 3C electronic device Download PDFInfo
- Publication number
- CN110154378A CN110154378A CN201810146452.9A CN201810146452A CN110154378A CN 110154378 A CN110154378 A CN 110154378A CN 201810146452 A CN201810146452 A CN 201810146452A CN 110154378 A CN110154378 A CN 110154378A
- Authority
- CN
- China
- Prior art keywords
- light transmission
- transmission base
- base enclosure
- electronic device
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/0073—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor of non-flat surfaces, e.g. curved, profiled
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/0091—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor in particular atmospheres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/26—Lining or sheathing of internal surfaces
- B29C63/30—Lining or sheathing of internal surfaces using sheet or web-like material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2791/00—Shaping characteristics in general
- B29C2791/004—Shaping under special conditions
- B29C2791/006—Using vacuum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2791/00—Shaping characteristics in general
- B29C2791/004—Shaping under special conditions
- B29C2791/007—Using fluid under pressure
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Telephone Set Structure (AREA)
Abstract
The present invention about 3C electronic device cambered shell manufacturing method, it is mainly in being equipped with decorations film in the light transmission base enclosure with bent arc design, and fitting positioning is generated by fixed point hot pressing, the light transmission base enclosure is seated in the closely sealed space of vacuum again, enable the decorations film that can fit closely with the light transmission base enclosure, hydraulic environment is provided again, allows the decorations film that can smoothly be incorporated into the light transmission base enclosure surface in the liquid solvent of high pressure-temperature；Method can allow the pattern accurate contraposition in cambered shell whereby, and it is smooth in the state that liquid is pressed cohere, the phenomenon that without generating curved arc part position gauffer, reach the effect of promoting cambered shell manufacturing yield.
Description
Technical field
The present invention is about a kind of cambered shell manufacturing method of 3C electronic device, and espespecially one kind has curved surface, curved arc part
The production method of the shell of position, can mainly allow the pattern accurate contraposition of enclosure interior, and smooth in the state that liquid press stick
Knot is its application invention without the phenomenon that generation curved arc part position gauffer.
Background technique
With the development of modern society and the progress of science and technology, requirement of the people for consumer electrical product is increasingly
High (such as light and short volume, diversified function, the appearance for having texture etc.).Therefore, current consumer electrical product
Product is based on thin design concept.For existing common high-end electronic product on the market, sheathing material be usually with
Based on metal or carbon fiber composite.This two kinds of materials all have high rigidity and light-weighted characteristic, therefore can be universally used in small ruler
Very little product (such as smartphone, navigation device etc.), middle sized products (such as laptop, tablet computer) and big
Sized products (such as All-in-One computer, LCD TV etc.).
For smartphone, since mobile phone invention, plastics are always the optimal selection of phone housing；And those hands
The pattern and words identification of machine or electronic product are typically either formed directly on the outer surface of plastic shell, but pattern and words identification
It can be become blurred because of abrasion after long-time use, greatly affected the beauty of electronic product.Until several years ago,
For the texture for promoting high-end electronic product, the concept of metal shell is imported, wear-resisting, texture is excellent, scattered however, metal shell has
The advantages that heat is good, slim；But metal can generate screen effect to electromagnetic wave, such as enter elevator, and mobile phone loses signal immediately, this is
The shielding of " metal cap " to mobile phone signal；These phenomenons show metal to the very strong shielding action of electromagnetic wave.So marching toward 5G
Epoch, metal shell then no longer favored.
For lifting shell texture, many researchs such as TaiWan, China patent announcement I 609786 are taken in production
A kind of casing manufacturing method includes: providing the first glass-fiber-plate；The first colloid is coated on first glass-fiber-plate, wherein this first
The material of colloid includes the chemical resin with frothing function；Second glass-fiber-plate is provided；Lid close second glass-fiber-plate to this first
On colloid；And cure first colloid and form buffer adhesive layer, wherein first glass-fiber-plate, the buffer adhesive layer and this
Two glass-fiber-plates constitute composite board.And above-mentioned technique is predominantly equipped with the first colloid between the first, second glass-fiber-plate, and by the
Curing forms buffer adhesive layer and is incorporated between the first, second glass-fiber-plate colloid for a long time；Therefore, there is system in process
Make the defect of time long cost of idleness again (needing two glass-fiber-plates).
Because with the presence of drawbacks described above, that is, having in the design of pad pasting direct in glass-fiber-plate, but all because of each brand electronic goods
There is the LOGO of house brand, and each brand has the position of exclusive pendulum decorations LOGO, therefore in pad pasting process, often because of board
Module or artificial problem and generate contraposition offset the phenomenon that, make LOGO can derive yield issues in correct position；In addition,
Because of the most of bent arc periphery all with bending of casing, in pad pasting, the bent arc periphery of casing can allow coating materials to generate fold
Phenomenon, therefore, it is difficult to reach smooth no wrinkle finished product, this requires study the key subjects of exploitation for industry.
Inventor adheres to the abundant of the relevant industries for many years and designs and develops and actual fabrication experience, provides a kind of 3C electronics
The cambered shell manufacturing method of device, to achieve the purpose that more preferably practical value.
Summary of the invention
The main purpose of the present invention is to provide a kind of cambered shell manufacturing methods of 3C electronic device, refer in particular to one kind
Production method with curved surface, the shell of curved arc part position, can mainly allow the pattern accurate contraposition of enclosure interior, and press in liquid
In the state of it is smooth cohere, without generate curved arc part position gauffer the phenomenon that be its purpose.
The cambered shell manufacturing method main purpose and effect of 3C electronic device of the present invention are by technological means in detail below
Reached:
It generates fitting positioning by fixed point hot pressing mainly in being equipped with decorations film in the light transmission base enclosure with bent arc design,
The light transmission base enclosure is seated in the closely sealed space of vacuum again, enables the decorations film that can fit closely with the light transmission base enclosure, then provide liquid
Pressure ring border allows the decorations film that can smoothly be incorporated into the light transmission base enclosure surface in the liquid solvent of high pressure-temperature；Method whereby can allow
Pattern accurate contraposition in cambered shell, and it is smooth in the state that liquid is pressed cohere, without generate curved arc part position gauffer
The phenomenon that, reach the effect of promoting cambered shell manufacturing yield.
The preferred embodiment of the cambered shell manufacturing method of 3C electronic device of the present invention, which includes the following steps:
(a) it provides and pinpoints heat-press step, adorn film in being equipped in the light transmission base enclosure with bent arc design, and will using thermal head
The decorations film imposes fixed point hot pressing, and is bonded and is positioned in the light transmission base enclosure；
(b) vacuum environment step is provided, the light transmission base enclosure of the fixed point fitting decorations film is placed in vacuum bag, and take out
Vacuum is taken, the decorations film is enable to fit closely in vacuum environment with the light transmission base enclosure；
(c) hydraulic combination step is provided again, the vacuum bag in above-mentioned steps is placed in the container for being injected with liquid solvent
In, and apply high pressure-temperature condition and allow the decorations film in the high pressure-temperature condition of liquid solvent in the liquid solvent in the container
It is smoothly incorporated into light transmission base enclosure surface down.
The preferred embodiment of the cambered shell manufacturing method of 3C electronic device of the present invention, wherein the heat described in step (a)
Pressure head is with 80~150 DEG C of progress hot pressing of temperature, and the time 3~5 seconds.
The preferred embodiment of the cambered shell manufacturing method of 3C electronic device of the present invention, wherein the high pressure in step (c) is high
Warm condition be with 1000~7000psi of pressure, 60~150 DEG C of temperature for it.More preferably, runing time is 10~30 minutes.
The preferred embodiment of the cambered shell manufacturing method of 3C electronic device of the present invention, wherein the light transmission base enclosure is to use
Glass, plastics or ceramics.
The preferred embodiment of the cambered shell manufacturing method of 3C electronic device of the present invention, wherein the decorations film is to use poly- second
Alkene terephthalate (PET) or environmentally-friendly multi-layer co-extrusion polyolefin (PO) film.
By the above, the composition of present system is illustrated with using implementation it is found that the present invention is compared with existing structure
Under have the advantage that
1. decorations film can be accurately positioned by fixed point heat-press step for the cambered shell manufacturing method of 3C electronic device of the present invention
In light transmission base enclosure, deviate the contraposition of its film layer pattern not, and it is more aesthetically pleasing with entirety after completion to make subsequent technique more accurate.
2. the cambered shell manufacturing method of 3C electronic device of the present invention allows positioning, contraposition to complete by vacuum environment step
Decorations film energy and light transmission base enclosure between generate greater area of closed state, and allow decorations film under vacuum state up to smooth and tight
The effect of closely connected conjunction light transmission base enclosure.
3. the cambered shell manufacturing method of 3C electronic device of the present invention allows by hydraulic combination step and adorns film energy and light transmission
Base enclosure to being located in liquid environment, and using balanced hydraulic and temperature decorations film can be smoothly incorporated under equal pressure condition
Light base enclosure reaches non-wrinkled smooth texture and aesthetics.
Detailed description of the invention
Fig. 1: step schematic diagram of the invention.
Fig. 2: step (a) schematic cross-sectional view of the invention.
Fig. 3: step (b) schematic cross-sectional view of the invention.
Fig. 4: step (c) schematic cross-sectional view of the invention.
Label in Fig. 1 to Fig. 4 has following meaning:
(a): fixed point heat-press step is provided；(b): vacuum environment step is provided；(c): hydraulic combination step is provided；1: light transmission
Base enclosure；2: decorations film；3: thermal head；4: vacuum bag；5: container.
Specific embodiment
Technology contents, goal of the invention and its effect of reaching to enable the present invention be used have more complete and clearly take off
Dew, now in lower detailed description, and also referring to the figure and attached drawing taken off:
Firstly, the step of please referring to shown in FIG. 1 to FIG. 4, being the cambered shell manufacturing method of 3C electronic device of the invention
And schematic cross-sectional view comprising have the following steps:
(a) it provides and pinpoints heat-press step, adorn film 2 in being equipped in the light transmission base enclosure 1 with bent arc design, and utilize thermal head
The decorations film 2 is imposed fixed point hot pressing by 3, and is bonded and is positioned in the light transmission base enclosure 1；
(b) vacuum environment step is provided, the light transmission base enclosure 1 of the fixed point fitting decorations film 2 is placed in vacuum bag 4,
And vacuum is extracted, so that the decorations film 2 is fitted closely in vacuum environment with the light transmission base enclosure 1；
(c) hydraulic combination step is provided, the vacuum bag 4 in above-mentioned steps is placed in the container 5 for being injected with liquid solvent
In, and apply high pressure-temperature condition in the liquid solvent in the container 5, allow the decorations film 2 in the high pressure-temperature of liquid solvent
Under the conditions of be smoothly incorporated into 1 inner surface of light transmission base enclosure.
Before actual fabrication, first chat the bright light transmission base enclosure 1 predominantly apply on 3C electronic device, as handset shell,
Running gear shell ... waits or periphery commodity；It takes the mobile phone as an example, such as same type or model, has a variety of colour systems, pattern supplies
Consumer's selection or each brand electronic goods have the LOGO of house brand therefore showing these colors, LOGO pattern
When, it need to be reached by the light transmission base enclosure 1 with transparent characteristic, and the light transmission base enclosure 1 can use glass material, plastic material
Or ceramic material is for it.Decorations film 2 described further then can the film of full-color colour system, patterned films or the film ... for indicating LOGO
Deng, and polyethylene terephthalate (PET) material or environmentally-friendly multi-layer co-extrusion polyolefin (PO) material can be used.
It when actual fabrication, please refers to shown in FIG. 1 to FIG. 4, the light transmission base enclosure has most bent arcs, curved surface
Design is expressed as mobile phone bottom case in drawing, the turnover song arc of curved arc part and quadripolar corners with surrounding as shown in figure citing
Portion illustrates operating procedure when the decorations film is full-color colour system and has the film of LOGO below:
Firstly, please referring to shown in FIG. 1 to FIG. 2, fixed point heat-press step is provided in step (a), is mainly had above-mentioned
Most bent arcs, curved design the light transmission base enclosure 1 be placed in mold platform, and be placed in the decorations film 2 in inside is corresponding,
According to corresponding position needed for the decorations film 2, if LOGO furnishes direction or has brand given location, first preliminary corresponding positioning,
Later, execute step (a), using 3 pressing action of thermal head, and it is corresponding the decorations film 2 is imposed into fixed-point type hot pressing, and by hot pressing
Temperature is controlled at 80~150 DEG C, hot pressing time about 3~5 seconds, its described 2 fixed-point type of decorations film is made to be bonded and be positioned at the light transmission
Inside base enclosure 1；Then, it please refers to shown in Fig. 1, Fig. 3, when Yu Zhihang step (b), to provide vacuum environment, and so-called vacuum
Environment mainly allows the light transmission base enclosure 1 in the state of vacuum drawn, can fit closely together with the decorations film 2, i.e., using true
Pneumatics power is located at the 2 smooth attaching of energy of the decorations film at curved arc part and turnover curved arc part, utilizes vacuum bag 4 in this, will determine
The light transmission base enclosure 1 of point fitting decorations film 2 is placed in the vacuum bag 4, then extract very by vacuum drawn equipment (not shown)
Sky enables its described decorations film 2 to fit closely in vacuum environment with the light transmission base enclosure 1.
Finally, please refer to shown in Fig. 1, Fig. 4, execute step (c), hydraulic combination step is provided, for will be in above-mentioned steps (b)
The internally disposed vacuum bag 4 for having decorations film fitting light transmission base enclosure 1 is placed in container 5, and is injected with liquid solvent in the container 5
(such as hydraulic machine equipment or can closed pressurized, heated equipment ...), the liquid for allowing vacuum bag 4 to be soaked in the container 5 is molten
Agent further applies high pressure-temperature condition in the liquid solvent in the container 5, and its high pressure-temperature condition is set as pressure
60~150 DEG C of 1000~7000psi, temperature, runing time are 10~30 minutes, using above-mentioned high pressure-temperature condition, are allowed
1 surface of light transmission base enclosure and the decorations film 2 generate it is micro- melt state, whereby, allow the decorations film 2 in the high pressure height of liquid solvent
1 inner surface of light transmission base enclosure can be smoothly incorporated under the conditions of temperature.
By the above, the composition of present system is illustrated with using implementation it is found that the present invention is compared with existing structure
Under have the advantage that
1. the cambered shell manufacturing method of 3C electronic device of the present invention can be accurately fixed by decorations film by pinpointing heat-press step
Position deviates the contraposition of its film layer pattern not in light transmission base enclosure, and it is more beautiful with entirety after completion to make subsequent technique more accurate
It sees.
2. the cambered shell manufacturing method of 3C electronic device of the present invention allows positioning, contraposition to complete by vacuum environment step
Decorations film energy and light transmission base enclosure between generate greater area of closed state, and allow decorations film under vacuum state, up to smooth and
The effect of fitting closely light transmission base enclosure.
3. the cambered shell manufacturing method of 3C electronic device of the present invention allows by hydraulic combination step and adorns film energy and light transmission
Base enclosure to being located in liquid environment, and using balanced hydraulic and temperature decorations film can be smoothly incorporated under equal pressure condition
Light base enclosure reaches non-wrinkled smooth texture and aesthetics.
Claims (6)
1. a kind of cambered shell manufacturing method of 3C electronic device comprising there is the following steps:
(a) it provides and pinpoints heat-press step, adorn film in being equipped in the light transmission base enclosure with bent arc design, and will be described using thermal head
Decorations film imposes fixed point hot pressing, and is bonded and is positioned in the light transmission base enclosure；
(b) vacuum environment step is provided, the light transmission base enclosure of the fixed point fitting decorations film is placed in vacuum bag, and extract true
Sky enables the decorations film to fit closely in vacuum environment with the light transmission base enclosure；
(c) hydraulic combination step is provided, the vacuum bag in above-mentioned steps is placed in the container for being injected with liquid solvent, and is applied
The hot conditions that add high pressure make the decorations film smooth under the conditions of the high pressure-temperature of liquid solvent in the liquid solvent in the container
It is incorporated into the light transmission base enclosure inner surface.
2. the cambered shell manufacturing method of 3C electronic device as described in claim 1, wherein the thermal head described in step (a)
With 80~150 DEG C of progress hot pressing of temperature, the time 3~5 seconds.
3. the cambered shell manufacturing method of 3C electronic device as claimed in claim 1 or 2, wherein the high pressure in step (c) is high
Warm condition be with 1000~7000psi of pressure, 60~150 DEG C of temperature for it.
4. the cambered shell manufacturing method of 3C electronic device as claimed in claim 3, wherein the further height in the step (c)
Super pressure-high temperature condition runing time was controlled at 10~30 minutes.
5. the cambered shell manufacturing method of 3C electronic device as claimed in claim 4, wherein the light transmission base enclosure is using glass
Glass, plastics or ceramics.
6. the cambered shell manufacturing method of 3C electronic device as claimed in claim 5, wherein the decorations film is using polyethylene
Terephthalate or environmentally-friendly multi-layer co-extrusion polyolefin film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810146452.9A CN110154378B (en) | 2018-02-12 | 2018-02-12 | Manufacturing method of curved surface shell of 3C electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810146452.9A CN110154378B (en) | 2018-02-12 | 2018-02-12 | Manufacturing method of curved surface shell of 3C electronic device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110154378A true CN110154378A (en) | 2019-08-23 |
| CN110154378B CN110154378B (en) | 2021-09-10 |
Family
ID=67635018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810146452.9A Active CN110154378B (en) | 2018-02-12 | 2018-02-12 | Manufacturing method of curved surface shell of 3C electronic device |
Country Status (1)
| Country | Link |
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| CN (1) | CN110154378B (en) |
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|---|---|---|---|---|
| EP0254901A2 (en) * | 1986-07-18 | 1988-02-03 | Tektronix, Inc. | Lamination method and apparatus |
| CN1559318A (en) * | 2004-02-23 | 2005-01-05 | ����̷� | Method for making helment by vacuum hydraulic |
| US20100151168A1 (en) * | 2008-12-12 | 2010-06-17 | Shenzhen Futaihong Precision Industry Co., Ltd. | Housing and method for manufacturing the same |
| US20110005797A1 (en) * | 2009-07-10 | 2011-01-13 | Shenzhen Futaihong Precision Industry Co., Ltd. | Device housing and method for making device housing |
| US7936273B2 (en) * | 2006-06-30 | 2011-05-03 | Fujitsu Limited | RFID tag manufacturing methods and RFID tags |
| US20110151189A1 (en) * | 2008-08-27 | 2011-06-23 | Bing Zhang | Shell and electronic device having the same |
| CN103052282A (en) * | 2011-10-13 | 2013-04-17 | 深圳富泰宏精密工业有限公司 | Electronic device shell and manufacturing method thereof |
| CN103826827A (en) * | 2011-07-12 | 2014-05-28 | 理化科技株式会社 | Molded article coated with film |
| US8763802B2 (en) * | 2010-10-19 | 2014-07-01 | Heylo Ltd | Cases for portable electronic devices |
| CN106347751A (en) * | 2016-11-17 | 2017-01-25 | 惠州市龙海科技有限公司 | Multipurpose attaching machine for 3D glass curved screens |
| TWI609786B (en) * | 2013-08-12 | 2018-01-01 | 緯創資通股份有限公司 | Housing manufacturing method, composite board, and housing |
-
2018
- 2018-02-12 CN CN201810146452.9A patent/CN110154378B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0254901A2 (en) * | 1986-07-18 | 1988-02-03 | Tektronix, Inc. | Lamination method and apparatus |
| CN1559318A (en) * | 2004-02-23 | 2005-01-05 | ����̷� | Method for making helment by vacuum hydraulic |
| US7936273B2 (en) * | 2006-06-30 | 2011-05-03 | Fujitsu Limited | RFID tag manufacturing methods and RFID tags |
| US20110151189A1 (en) * | 2008-08-27 | 2011-06-23 | Bing Zhang | Shell and electronic device having the same |
| US20100151168A1 (en) * | 2008-12-12 | 2010-06-17 | Shenzhen Futaihong Precision Industry Co., Ltd. | Housing and method for manufacturing the same |
| US20110005797A1 (en) * | 2009-07-10 | 2011-01-13 | Shenzhen Futaihong Precision Industry Co., Ltd. | Device housing and method for making device housing |
| US8763802B2 (en) * | 2010-10-19 | 2014-07-01 | Heylo Ltd | Cases for portable electronic devices |
| CN103826827A (en) * | 2011-07-12 | 2014-05-28 | 理化科技株式会社 | Molded article coated with film |
| CN103052282A (en) * | 2011-10-13 | 2013-04-17 | 深圳富泰宏精密工业有限公司 | Electronic device shell and manufacturing method thereof |
| TWI609786B (en) * | 2013-08-12 | 2018-01-01 | 緯創資通股份有限公司 | Housing manufacturing method, composite board, and housing |
| CN106347751A (en) * | 2016-11-17 | 2017-01-25 | 惠州市龙海科技有限公司 | Multipurpose attaching machine for 3D glass curved screens |
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| Publication number | Publication date |
|---|---|
| CN110154378B (en) | 2021-09-10 |
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Application publication date: 20190823 Assignee: Shenzhen pinjiang Industrial Design Co.,Ltd. Assignor: He Yingxin Contract record no.: X2022990000239 Denomination of invention: Manufacturing method of curved shell of 3C electronic device Granted publication date: 20210910 License type: Exclusive License Record date: 20220510 |