CN108024464A - Housing and preparation method, mobile terminal - Google Patents
Housing and preparation method, mobile terminal Download PDFInfo
- Publication number
- CN108024464A CN108024464A CN201711080022.3A CN201711080022A CN108024464A CN 108024464 A CN108024464 A CN 108024464A CN 201711080022 A CN201711080022 A CN 201711080022A CN 108024464 A CN108024464 A CN 108024464A
- Authority
- CN
- China
- Prior art keywords
- injection
- housing
- resin
- supporting structure
- mould
- 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.)
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
- H05K5/0243—Mechanical details of casings for decorative purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B11/00—Making preforms
- B29B11/06—Making preforms by moulding the material
- B29B11/08—Injection moulding
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Telephone Set Structure (AREA)
- Casings For Electric Apparatus (AREA)
Abstract
The present invention proposes housing and preparation method thereof, mobile terminal.This method includes：By first time in-mould injection, internal moulding is formed；By second of in-mould injection, supporting structure is formed between the internal moulding and injection diaphragm, to obtain the housing.Thus, by the way that internal moulding and supporting structure substep are molded, internal moulding can be formed by higher, the preferable material of mobility using melting temperature, the complex moulding of structure can be formed；Using melting temperature is relatively low, material of better mechanical property forms supporting structure, it is ensured that the overall mechanical properties of the housing.
Description
Technical field
The present invention relates to Material Field, and in particular, to housing and preparation method, mobile terminal.
Background technology
With the raising of the level of consumption, consumer not only pursues industrial products the variation of function, and to its appearance,
Texture etc. also has increasingly higher demands.For example, the mobile terminal such as current mobile phone, tablet computer, more and more using arc
Larger integral housing is spent, to lift user experience.In recent years, in-mold decoration injection molding technology (Insert Mold Three-
Dimensional decoration, IMT, or be in-mould injection 3D decoration techniques) it is widely used in mobile terminal shell
Manufacturing field.The concrete structure for the product that IMT is formed can be Surface hardened layer transparent membrane, middle printing pattern layer, the back side
Injection molded layers.Because patterned layer can make good product clarity height, three-dimensional sense, rub resistance, prevent that surface from being scraped positioned at centre
Spend, and the distinctness of color can be kept for a long time, not fugitive color.
However, mobile terminal shell formed using inmold injection technique and preparation method thereof is still had much room for improvement.
The content of the invention
The application is made based on discovery of the inventor to following facts and problem and understanding：
The mechanical performance of the housing prepared at present using IMT or IML technologies, generally existing injection quality and housing can not
The problem of taking into account.Specifically, for injected plastics material of the same race, such as extent of polymerization height, usual better mechanical property, but melting temperature
Degree is also higher.While mechanical strength is ensured, it is molded, is advantageously formed according to the higher plastic material of extent of polymerization
Complicated fine injection structure, and it is preferable to be molded quality.But injection temperature is higher, in injection moulding process, the plastic cement of injection is former
The problems such as material is big to the percussion of diaphragm and ink, and diaphragm is easily deformed, generation red ink.And injection temperature is such as reduced, though
The problems such as diaphragm is unlikely to deform, is not susceptible to red ink in right injection moulding process, but since extent of polymerization is relatively low, can not be formed fine multiple
Miscellaneous injection structure, it is impossible to meet the requirement of the appearance and performance of housing, can not also ensure the mechanical strength of whole housing,
Easily deform in use, it is necessary to which additional reinforcing rib, metal support structure etc., on the one hand add work
Sequence, on the other hand adds the complexity of shell structure and the thickness of housing entirety, is unfavorable for mobile terminal integral thickness
Be thinned.Therefore, the housing prepared currently with IMT or IML technologies, it is difficult to take into account injection quality and the mechanicalness of housing
Energy.
It is contemplated that solve at least some of the technical problems in related technologies.
In one aspect of the invention, the present invention proposes a kind of method for preparing housing.According to an embodiment of the invention,
This method includes：By first time in-mould injection, internal moulding is formed；By second of in-mould injection, in the internal note
Supporting structure is formed between plastic and injection diaphragm, to obtain the housing.Thus, by by internal moulding and branch
Support structure substep is molded, and can be formed internal moulding by higher, the preferable material of mobility using melting temperature, can be formed knot
The complex moulding of structure；Using melting temperature is relatively low, material of better mechanical property forms supporting structure, it is ensured that should
The overall mechanical properties of housing.
In still another aspect of the invention, the present invention proposes a kind of housing.According to an embodiment of the invention, the housing is
Prepared using foregoing method.Thus, which has possessed by housing prepared by foregoing method all
Feature and advantage, details are not described herein.
In still another aspect of the invention, the present invention proposes a kind of housing.According to an embodiment of the invention, the housing bag
Include：Housing body, the housing body include inside moulding and the supporting structure sequentially formed, and the internal moulding is set
Put in the side of the supporting structure, the material for forming the internal moulding and the supporting structure is different；It is molded diaphragm
Layer, the injection membrane layer are arranged on side of the supporting structure away from the inner supporting structure.Thus, which can be with
Injection quality and the mechanical performance of housing are taken into account, the inner space of the mobile terminal using the housing can be saved.
In still another aspect of the invention, the present invention proposes a kind of mobile terminal.According to an embodiment of the invention, the movement
Terminal includes housing, and the housing is foregoing, and mainboard and memory are provided with the housing；Screen, the screen
Curtain is arranged on the top of the housing and is connected with the mainboard.Thus, which there is foregoing housing to be had
The whole features and advantage having, details are not described herein.
Brief description of the drawings
Fig. 1 shows the method flow diagram according to an embodiment of the invention for preparing housing；
Fig. 2 shows the structure diagram of housing according to an embodiment of the invention；And
Fig. 3 shows the structure diagram of mobile terminal according to an embodiment of the invention.
Reference numeral：
100：It is molded membrane layer；10：Internal moulding；20：Supporting structure；200：Housing；1000：Mobile terminal.
Embodiment
The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings.Below with reference to
The embodiment of attached drawing description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
In order to facilitate understanding, in-mould injection technique is briefly described first below：
A kind of new technique that IMT (IML) essence is screen painting and Shooting Technique is combined.Prepared and moved with IMT (IML)
During dynamic terminal shell, screen painting is carried out on clear sheet (printable fabric, diaphragm is molded for being formed) first, completes picture and text
Transfer, then carries out forming processes to the clear sheet with patterned layer, forms injection diaphragm, then injection diaphragm is put into injection
In mould, it is fixed in housing body.The patterned layer of the injection diaphragm is set away from housing body.The injection diaphragm can be protected finally
(i.e. IMT technologies) is stayed in housing body, the structures such as release film layer can also be set in patterned layer, the later stage removes release film layer
Remove, the patterned layer (i.e. IML technologies) of injection diaphragm is retained only in housing body.Wherein, housing body can be pre-formed
Or during in-mould injection, injected plastics material is injected at the injection hole of mould, and fill the note of whole mould
Mould space and formed.Grinding process etc. finally is carried out to the housing after injection process, obtains that there is certain picture and text appearance
The mobile terminal shell of effect.
In one aspect of the invention, the present invention proposes a kind of method for preparing housing.According to an embodiment of the invention,
With reference to figure 1, this method includes：
S100：First time in-mould injection, forms internal moulding
According to an embodiment of the invention, in this step, internal moulding is formed by first time in-mould injection first.
As it was previously stated, substep injection prepares housing, injection quality and the overall mechanical properties of housing are advantageously ensured that.Inventor passes through
Further investigation is found, can be used the higher material of melting temperature, be formed internal moulding by in-mould injection first.Due to interior
Portion's moulding does not contact directly with being provided with the injection diaphragm of exterior design, and therefore, first time in-mould injection can use higher
Temperature formed, without worry in injection moulding process to injection diaphragm adversely affect.
Specifically, according to an embodiment of the invention, the injection temperature of first time in-mould injection can be 280~300 Celsius
Degree.Material can be the first injected plastics material used by first time in-mould injection, and the first injected plastics material can include PC and ABS
At least one of, as long as disclosure satisfy that above-mentioned injection temperature.It is for instance possible to use PC is the first injected plastics material, alternatively, adopting
It is the first injected plastics material with the blend of PC and ABS.In the blend of above-mentioned PC and ABS, the content of PC can be slightly more,
To ensure that the first injected plastics material has higher melting temperature.Inventor passes through further investigation and finds, what above-mentioned material was formed
Internal moulding can have complex structure, therefore easy to save the inner space of the mobile terminal using the housing.
According to an embodiment of the invention, the concrete shape of above-mentioned internal moulding is not particularly limited, and those skilled in the art can root
According to the model of the specific mobile terminal using the housing, and internal mainboard, the isostructural facilities of battery, design is therewith
Matched internal moulding, while fixed said structure, to save the inner space of mobile terminal.
S200：Second of in-mould injection, forms supporting structure
According to an embodiment of the invention, in this step, by second of in-mould injection, in internal moulding and injection
Supporting structure is formed between diaphragm, to obtain the housing.Thus, it can both alleviate the impact ink in injection moulding process, generate
The problems such as bubble, and can ensure the overall mechanical properties of housing finally obtained.
According to a particular embodiment of the invention, the temperature of second of in-mould injection can be less than previously described first time mould
The temperature of interior injection.Due to the supporting structure that second of in-mould injection is formed, directly it is in contact with injection film layer, it is possible thereby to anti-
Only injection temperature is excessive, caused by red ink, damage injection film layer the problems such as.
Specifically, according to an embodiment of the invention, the injection temperature of second of in-mould injection can be 270~290 Celsius
Degree.For example, it can be 270~280 degrees Celsius.Above-mentioned supporting structure can be formed by the second injected plastics material.According to this hair
Bright embodiment, the second injected plastics material can include at least one of PC and ABS.For example, can be ABS, or ABS and PC
Blend.Wherein, compared with the first injected plastics material, the content of PC can be slightly lower in the blend of ABS and PC.Thus, may be used
To realize the injection molding of supporting structure under relatively low injection temperature.
According to an embodiment of the invention, on the premise of meeting that the first injection temperature is higher than the second injection temperature, above-mentioned the
At least one of one injected plastics material and the second injected plastics material can meet the following conditions：First injected plastics material and the second injection
Material can separately include PC, and the melt index of the material is less than 28g/10min.Thus, which not only has
Relatively low melting temperature and preferable mobility, can meet the needs of IMT and IML Shooting Techniques, and when using above-mentioned
Material, in the sheet surface with membrane material, when being especially printed with the membrane material surface of ink layer and being molded, can also alleviate film
The problems such as red ink occurs for the deformation of piece and ink layer, is also beneficial to form the complex moulding of structure, and then can save
The about inner space of mobile terminal.
It should be noted that the material of above-mentioned the first injected plastics material of composition and the second injected plastics material (or hereinafter referred to
For plastics) specific chemical composition be not particularly limited, as long as can meet the needs of in-mould injection technique, while melt index
Under in above range.Those skilled in the art can form the concrete application environment of material according to injection, to above-mentioned material
Specific chemical composition make choice.For example, above-mentioned plastics can also be PMMA, PET, PS etc., to meet such as cell phone back
The isostructural demand of shell, home electronic panel.According to a particular embodiment of the invention, for example, being used for the movement such as mobile phone when preparing
During the housing of terminal, PC can be included in the plastics.Thus, the plate that in-mould injection is formed, can meet mobile terminal shell
Demand.According to an embodiment of the invention, the melt index of the plastics can be 18-28g/10min.Thus, the material with
When in-mould injection, can have preferable mobility and toughness.Therefore, material according to embodiments of the present invention, can be used for
Using inmold injection technique, manufacture radius of curvature is larger or has the product of labyrinth.
It should be noted that term " melt index " can be by mode familiar to those skilled in the art test and
Obtain.Specifically, its test method can be first to allow plastic pellet in certain time (as it employed herein 10 minutes)
Under interior, certain temperature and pressure (a variety of materials standard is different, and those skilled in the art can select as the case may be), melt
Into plastic liquid, the grams (g) then flowed out by an a diameter of 2.095mm pipes.The numerical value of melt index is bigger, represents
The processing fluidity of the plastic material is better, on the contrary then poorer.Therefore, according to an embodiment of the invention, for IMT injection molded layers
Plastic material needs higher mobility, that is, has higher melt index.
According to an embodiment of the invention, which is by the first resin and the second resin, is formed by melting coextrusion
, wherein, the molecular weight of the first resin is more than the molecular weight of the second resin.It should be noted that term " the molecule of the first resin
Amount ", " molecular weight of the second resin " etc., refer in particular to form the molecular weight of the principal polymeric of the resin.For example, when the first resin or
During the blend that the second resin is formed for two or more polymer, " molecular weight of the first resin ", " point of the second resin
Son amount ", is refered in particular in the resin, the molecular weight of polymer of the mass content more than 50%.It should be noted that term is " poly-
Compound " should be interpreted broadly, it both includes the polymer formed by single monomer, the copolymer also formed including various of monomer.
According to an embodiment of the invention, the component of the first resin and the second resin, mixed proportion etc. are not particularly limited, if this first
The molecular weight of resin is more than the molecular weight of the second resin, and the melt index of the plastics formed is less than 28g/10min.By
This, according to the specific chemical composition of the first resin and the second resin, can adjust the ratio of the first resin with larger molecular weight
Example, and the ratio of the second resin with less molecular weight, make the melt index of the plastics of formation meet in-mould injection work
Skill requirement.Inventor's discovery, other physical and chemical performances of resin, the influence for the melt index of finally formed plastics are smaller.
Thus, it is only required to make the first resin and the molecular weight of the main constituents in the second resin that there is difference, can both pass through
Adjusting to the first resin and the second resin mixed proportion, obtains the plastics of melt index meet demand.
According to an embodiment of the invention, the first resin can be the blend for including PC and ABS.The blending of PC and ABS
Thing has relatively low melting temperature and higher mobility, disclosure satisfy that the needs of IMT Shooting Techniques.Implement according to the present invention
Example, which can include PC, and the molecular weight of the PC in second resin can be 20,000-5 ten thousand.Inventor passes through
Numerous studies are found, when the molecular weight of PC in the second resin is in 20,000-5 ten thousand scope, institute after the first resin and the mixing of the second resin
Obtained plastics have preferable toughness, especially suitable for forming mobile terminal shell using in-mould injection.According to the present invention
Embodiment, the molecular weight of the PC in the first resin, more than the molecular weight of PC in the second resin.Thus, containing lower molecular weight PC
The second resin mixed with the first resin containing higher molecular weight PC after, the toughness of the first resin can be adjusted so that first
Resin and the mixed plastics of the second resin have good toughness, while can have preferable mobility and mechanical strength.
According to an embodiment of the invention, the mass ratio of the first resin and the second resin is more than 1：1.In other words, the modeling
In material, the quality of the first resin is more than the quality of the second resin.Inventor has found by many experiments, when above-mentioned mass ratio is excessive
When, the first resin content is excessive, and the toughness for be easy to causeing plastics is poor, it is difficult to ensure carry out in-mould injection when do not impact sheet material or
Ink layer；And aforementioned proportion it is too small when, the second resin content is excessive, and it is too strong to be easy to cause the mobility of plastics, can not utilize mould
Interior injection molding technology forms complex injection structure.And when the mass ratio of the first resin and the second resin is more than 1：, can when 1
With while the plastics toughness is improved, and it can guarantee that other performances such as the hardness of the plastics, mechanical strength are unaffected.
According to an embodiment of the invention, the above method not only contributes to take into account injection quality and the overall mechanicalness of housing
Can, and existing inmold injection technique need not be greatly improved and can be achieved：Double coloured plastic injection machine can be used, substep is noted
Modeling, you can prepare housing according to the method for the embodiment of the present invention to realize to utilize.
To sum up, the above method at least one of has the following advantages：
(1) can preparation structure complexity moulding, be conducive to save mobile terminal inner space；
(2) injection moulding process will not to injection diaphragm adversely affect, be conducive to alleviate in addition solve red ink, thickness print,
Bubble etc. is bad；
(3) housing overall mechanical properties are excellent.
In another aspect of this invention, the present invention proposes a kind of housing.According to an embodiment of the invention, which is profit
Prepared with foregoing method.Thus, which has all special possessed by housing prepared by foregoing method
Sign and advantage, details are not described herein.
In still another aspect of the invention, the present invention proposes a kind of housing.According to an embodiment of the invention, should with reference to figure 2
Housing 200 can include：Housing body and injection membrane layer 100.Specifically, housing body can include：Internal moulding
10 and supporting structure 20.
According to a particular embodiment of the invention, supporting structure 20 is in contact with injection membrane layer 100, and internal moulding 10 is set
Put the material difference in side of the supporting structure 20 away from injection membrane layer 100, forming internal moulding and supporting structure.
According to an embodiment of the invention, which can be formed using foregoing method.Thus, which has
There are whole features and advantage possessed by the housing of foregoing mould preparation, details are not described herein.
In still another aspect of the invention, the present invention proposes a kind of mobile terminal.According to an embodiment of the invention, reference chart
3, which includes housing 200 and screen (not shown), and housing 200 is foregoing, in housing 200
Mainboard and memory (not shown) are provided with, screen is arranged on the top of housing and is connected with mainboard (not to be shown in figure
Go out).Thus, the mobile terminal 1000 have the advantages that possessed by foregoing housing whole features and, it is no longer superfluous herein
State.
Embodiments of the present invention described in detail above, still, the tool during present invention is not limited to the embodiments described above
Body details, in the range of the technology design of the present invention, can carry out a variety of simple variants, these letters to technical scheme
Monotropic type belongs to protection scope of the present invention.It is it is further to note that each described in above-mentioned embodiment
A particular technique feature, in the case of reconcilable, can be combined by any suitable means.
In the description of the present invention, it is to be understood that term " on ", " under ", "front", "rear", " top ", " bottom " " interior ",
The orientation or position relationship of instructions such as " outer " are based on orientation shown in the drawings or position relationship, are for only for ease of and describe this hair
It is bright and simplify description, rather than instruction or imply that signified device or element must have specific orientation, with specific orientation
Construction and operation, therefore be not considered as limiting the invention.For example, in the present invention, stainless steel materials and stainless steel
Substrate, aluminium lamination, anodic oxide coating isostructural " upper surface " refer in practical applications, and the plate or structure are towards external environment condition
And the side away from electronic equipment internal.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment of the present invention or example.In the present specification, schematic expression of the above terms is not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
Combined in an appropriate manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this area
Art personnel can be tied the different embodiments or example described in this specification and different embodiments or exemplary feature
Close and combine.
Although the embodiment of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (14)
- A kind of 1. method for preparing housing, it is characterised in that the described method includes：By first time in-mould injection, internal moulding is formed；By second of in-mould injection, supporting structure is formed between the internal moulding and injection diaphragm, to obtain The housing.
- 2. according to the method described in claim 1, it is characterized in that, the injection temperature of the first time in-mould injection, higher than institute State the injection temperature of second of in-mould injection.
- 3. according to the method described in claim 2, it is characterized in that, the injection temperature of the first time in-mould injection for 280~ 300 degrees Celsius；The injection temperature of second of in-mould injection is 270~290 degrees Celsius.
- 4. the according to the method described in claim 1, it is characterized in that, material of the first time in-mould injection and described second The material of in-mould injection is different.
- 5. according to the method described in claim 4, it is characterized in that, the internal moulding is formed by the first injection-moulded plastic , the supporting structure is formed by the second injection-moulded plastic,First injection-moulded plastic and second injection-moulded plastic are separately selected from least one of PC and ABS.
- 6. according to the method described in claim 5, it is characterized in that, first injection-moulded plastic and second injection-moulded plastic At least one of melt index be less than 28g/10min.
- 7. according to the method described in claim 6, it is characterized in that, first injection-moulded plastic and second injection-moulded plastic At least one of be by the first resin and the second resin, by melt coextrusion formed, wherein, first resin point Molecular weight of the son amount more than second resin.
- 8. the method according to the description of claim 7 is characterized in that second resin includes PC, PC in second resin Molecular weight be 20,000~50,000.
- 9. the method according to the description of claim 7 is characterized in that first resin is the blend for including PC and ABS.
- 10. method according to claim 8 or claim 9, it is characterised in that the molecular weight of the PC in first resin, is more than The molecular weight of PC in second resin.
- 11. the according to the method described in claim 8, it is characterized in that, quality of first resin and second resin Than more than 1：1.
- 12. a kind of housing, it is characterised in that the housing is prepared using claim 1-11 any one of them method.
- 13. a kind of housing, it is characterised in that the housing includes：Housing body, the housing body include inside moulding and the supporting structure sequentially formed, the internal moulding The side of the supporting structure is arranged on, the material for forming the internal moulding and the supporting structure is different；Membrane layer is molded, the injection membrane layer is arranged on side of the supporting structure away from the inner supporting structure.
- A kind of 14. mobile terminal, it is characterised in that including：Housing, the housing are described in claim 12 or 13, and mainboard and memory are provided with the housing；Screen, the screen are arranged on the top of the housing and are connected with the mainboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711080022.3A CN108024464B (en) | 2017-11-06 | 2017-11-06 | Shell, preparation method and mobile terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711080022.3A CN108024464B (en) | 2017-11-06 | 2017-11-06 | Shell, preparation method and mobile terminal |
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| CN108024464A true CN108024464A (en) | 2018-05-11 |
| CN108024464B CN108024464B (en) | 2020-07-10 |
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|---|---|---|---|---|
| CN110978382A (en) * | 2019-12-24 | 2020-04-10 | 东莞华贝电子科技有限公司 | Product preparation method, product and electronic equipment |
| CN114474562A (en) * | 2020-10-27 | 2022-05-13 | Oppo广东移动通信有限公司 | Shell assembly, preparation method thereof and electronic equipment |
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| CN108024464B (en) | 2020-07-10 |
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