CN111212163A - Preparation method of mobile phone rear shell and mobile phone rear shell - Google Patents
Preparation method of mobile phone rear shell and mobile phone rear shell Download PDFInfo
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- CN111212163A CN111212163A CN202010092839.8A CN202010092839A CN111212163A CN 111212163 A CN111212163 A CN 111212163A CN 202010092839 A CN202010092839 A CN 202010092839A CN 111212163 A CN111212163 A CN 111212163A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/0279—Improving the user comfort or ergonomics
- H04M1/0283—Improving the user comfort or ergonomics for providing a decorative aspect, e.g. customization of casings, exchangeable faceplate
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Abstract
The embodiment of the application discloses preparation method and cell-phone backshell of cell-phone backshell, wherein, preparation method includes that, obtains the material through cutting down the raw materials processing and be PC and PMMA mixture and be transparent platelike substrate, makes through offset printing or dip-dyeing processing the substrate is polychrome or gradient, handles through printing bottom colour and lid and makes the substrate has certain colour and realizes the shading, handles through the hot bending shaping and makes the edge of substrate forms the fillet. By the method, the mobile phone rear shell with texture close to that of glass or ceramic can be manufactured, and shielding and interference of a metal mobile phone rear shell on mobile phone signals are avoided.
Description
Technical Field
The application relates to the technical field of mobile phone backshells, in particular to a preparation method of a mobile phone backshell and the mobile phone backshell.
Background
Nowadays, mobile phones become an indispensable part of daily life of people, and different requirements of consumers also promote continuous innovation of various mobile phone manufacturers, so that more mobile phones which can meet the aesthetic and practical requirements of users are manufactured. With the development of science and technology, the 5G era is also closer to us, and one characteristic of 5G is millimeter wave, the shorter the wavelength, the higher the transmission frequency, and the faster the transmission speed.
At present, the backshell of the mobile phone is usually made of metal, and the metal backshell can shield and interfere signals and limit the transmission speed.
Disclosure of Invention
The embodiment of the application provides a preparation method of a mobile phone rear shell and a mobile phone thereof, which can enable the texture of the prepared mobile phone rear shell to be close to that of glass or ceramic materials, and avoid shielding and interference of a metal mobile phone rear shell on mobile phone signals.
In a first aspect, an embodiment of the present application provides a method for manufacturing a mobile phone rear shell, where the method includes the following steps:
cutting raw materials to obtain a transparent plate-shaped base material made of a mixture of PC and PMMA;
making the substrate in multicolor or gradient color through offset printing or dip dyeing treatment;
the base material has a certain color and is shielded from light through printing a ground color and covering and priming treatment;
the edges of the substrate are rounded by a hot roll forming process.
In a second aspect, the embodiment of the application provides a mobile phone backshell, the mobile phone backshell is made by foretell preparation method, including base plate layer, semi-permeable color layer and the printing ink layer that from top to bottom sets gradually, wherein, the base plate layer is handled by cutting the raw materials and is obtained, semi-permeable color layer is handled through offset printing or dip-dyeing and is obtained, the printing ink layer is handled through printing base colour and lid base and is obtained.
The embodiment of the application provides a preparation method of cell-phone backshell and cell-phone backshell thereof, wherein, the preparation method of cell-phone backshell does, obtains the material through cutting down the raw materials processing and be PC and PMMA mixture and be transparent platelike substrate, makes through offset printing or dip-dyeing processing the substrate is polychrome or gradient, handles through printing bottom colour and lid and makes the shading is realized to the substrate, handles through the hot bending shaping and makes the edge of substrate forms the fillet. By the mode, the mobile phone rear shell with the texture close to that of glass or ceramic can be manufactured, and the shielding and interference of a metal mobile phone rear shell on mobile phone signals are avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a mobile phone rear case according to the present application;
FIG. 2 is a flow chart of a method for preparing the rear cover of the handset shown in FIG. 1;
FIG. 3 is another flow chart of a method of making the back cover of the handset shown in FIG. 1;
FIG. 4 is a table of one structural design of the back cover of the handset shown in FIG. 1;
FIG. 5 is another structural design chart of the rear cover of the cellular phone shown in FIG. 1
Referring to fig. 1 to 5,100 is a mobile phone back case, 10 substrate layers, 20 a semi-permeable color layer, 30 a UV transfer layer, 40 a brightness enhancement layer, 50 an ink layer, 501 a color ink layer, 502 a cover bottom ink layer, and 60 a hardening layer.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. When an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
The embodiment of the application provides a method for preparing a rear shell of a mobile phone, by which a rear shell with texture close to that of glass or ceramic can be obtained, and a structure with an integrated middle frame and rear shell can be obtained, i.e. the middle frame is omitted, and the detailed description is provided below.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a mobile phone rear case according to an embodiment of the present disclosure, in which the mobile phone rear case 100 includes a hardening layer 60, a substrate layer 10, a semi-permeable color layer 20, a UV transfer layer 30, a brightness enhancement layer 40, and an ink layer 50, which are sequentially disposed from top to bottom.
Further, the mobile phone rear case 100 is manufactured by processing a base material in one step.
Specifically, the substrate layer 10 is an initial raw material plate of the mobile phone rear case 100, and the mobile phone rear case 100 is finally formed by processing to form the following layers.
The substrate layer 10 is a raw material of the mobile phone rear shell 100 and has a transparent plate-shaped structure, the material of the substrate layer 10 is a PC and PMMA mixed material, the thickness of the substrate layer can be selected from 0.5mm to 1.0mm, and preferably, the thickness of the substrate layer 10 is selected from 0.8 mm.
The PC material is polycarbonate and is a high molecular polymer with a carbonate group in a molecular chain, the PMMA material is a transparent thermoplastic polymer, and the PC and the PMMA are mixed to form a mixture with high transparency.
Specifically, the thickness of the base material of the raw material is selected, the raw material is cut according to needs, the cut part is punched according to the film comparison, so that the base plate 10 is obtained, that is, the base material is obtained, and the mobile phone rear shell 100 is obtained by processing the base material one step.
The semi-permeable color layer 20 is used for enabling the mobile phone rear shell 100 to achieve a multi-color or gradient effect, so that the mobile phone rear shell 100 is more attractive and meets the requirement of a user on high color value.
Of course, in other embodiments, if the mobile phone rear case 100 does not need to obtain a multi-color or gradient effect, the corresponding process steps can be omitted and this layer can be eliminated.
The UV transfer layer 30 is used for right the cell phone back case 100 is textured, and the thickness of its texture is usually about 10um, makes the cell phone back case 100 has fine texture, makes the cell phone back case 100 is more pleasing to the eye.
The purpose of the brightness enhancing layer 40 is to provide brightness enhancement, the brightness enhancing layer 40 is actually a coated optical film layer made of titanium compound, magnesium compound or other compounds, in this embodiment, the brightness enhancing layer 40 is mainly a titanium compound, such as mixed oxide of Ti3O5+ sio2, the thickness of the brightness enhancing layer 40 is between 50nm and 200nm, and in actual application, the thickness of the brightness enhancing layer 40 varies according to different colors.
In the above description, the semi-transparent color layer 20 is mainly used to make the mobile phone back cover 100 have a multi-color or gradient effect, and the UV transfer layer 30 and the brightness enhancement layer 40 are both used to make the mobile phone back cover 100 have a glare texture, so as to achieve the aesthetic appearance of the mobile phone back cover 100.
The ink layers 50 comprise a colour ink layer 501 and a base-capping ink layer 502, wherein the colour ink layer 501 is located between the brightness enhancing layer 40 and the base-capping ink layer 502.
The color ink layer 501 mainly represents the color of the mobile phone rear shell 100, and the cover bottom ink layer 502 is mainly used for covering the color ink layer 501 to play a role in shading light, so that light leakage at a later stage is avoided, and a protection effect is also achieved.
In this embodiment, color ink layer 501 is one layer, and thickness is 10um to 12um, end of lid ink layer 502 is three-layer or four-layer, each layer end of lid ink layer 502's thickness is about 10um, consequently, the thickness of ink layer is 40um to 52 um.
The hardened layer 60 is used to increase the hardness of the mobile phone rear case 100, and the hardness thereof is 2H to 4H, preferably, the hardness of the hardened layer is 3H.
In this embodiment, the mobile phone back case 100 includes a substrate layer 10, a semi-transparent color layer 20, a UV transfer layer 30, a brightness enhancement layer 40, an ink layer 50, and a hardening layer 60. In other embodiments, the mobile phone back case 100 includes a substrate layer 10, a semi-transparent color layer 20, an ink layer 50, and a hardened layer 60. Alternatively, in other embodiments, the handset back shell 100 includes a substrate layer 10, a UV transfer layer 30, a brightness enhancing layer 40, an ink layer 50, and a stiffening layer 60.
Referring to fig. 2, fig. 2 is a flow chart of a method for manufacturing a rear case of a mobile phone according to an embodiment of the present invention, in which the rear case 100 of the mobile phone is actually manufactured by a Unibody technology, and the Unibody technology is an integrally formed technology, and has the characteristics of being integrally formed, short in process flow, firm, neat, and few in parts of the whole mobile phone, and the method for manufacturing the rear case 100 of the mobile phone includes the following steps:
101: the base material which is a mixture of PC and PMMA and is in a transparent plate shape is obtained by cutting raw materials.
The base material of the mobile phone rear case 100 in the present application is a mixture of PC and PMMA, both of which have high transparency, and the mixture after mixing is transparent as well. Selecting a mixture of PC and PMMA with a certain thickness as a raw material, cutting the raw material to obtain a base material with a certain thickness and size, and processing the base material step by step to finally obtain the mobile phone rear shell 100.
103: the substrate is given a multiple or gradient color by offset or exhaust treatment.
Offset printing or dip dyeing is a process used in manufacturing to give a product a multi-color or gradient color effect, and offset printing or dip dyeing is performed on a substrate that appears transparent so that the substrate has a multi-color or gradient color effect.
106: and the base material is shaded through printing a ground color and covering and priming treatment.
Because the base material is transparent, the base material needs to be shielded from light through a process of printing a ground color and a cover bottom, the process of printing the ground color and the cover bottom is generally divided into a process of printing the ground color and a process of printing the cover bottom, the process of printing the ground color selects colors according to needs, and the color selected by the process of printing the cover bottom is generally white, gray or black.
108: the edges of the substrate are rounded by a hot roll forming process.
The backshell of cell-phone need be processed at the junction of four edges and edges usually when the design, forms the arc, on the one hand, can be so that the backshell that processing made is comparatively pleasing to the eye in the appearance, and on the other hand, because the edge of backshell and edge junction are the arc for whole backshell forms an accepting groove, and after the backshell and the preceding shell of cell-phone are connected fixedly, can be so that the inside confined accommodating space that forms of cell-phone for electronic components and parts and some structures are acceptd in the installation.
The hot bending molding is to heat and soften a solid base material at a high temperature, then change the shape of the base material in a softened state, and after the shape is changed, realize solidification in a cooling mode, so as to obtain the solid base material with a certain shape.
In this embodiment, the fillet of the base material is formed through the hot bending molding, and actually, the edge of the base material is rounded all around through the hot bending molding.
Referring to fig. 3, fig. 3 is another flowchart of a method for manufacturing a rear case of a mobile phone according to an embodiment of the present invention, in which the rear case 100 of the mobile phone is actually manufactured by using a Unibody technology, and the Unibody technology is an integrally formed technology, and has the characteristics of being integrally formed, short in process flow, firm, tidy, and few in parts of the whole mobile phone, and specifically, the rear case 100 of the mobile phone is manufactured by the following steps:
201: and cutting the raw materials.
Cutting a raw material which is a mixture of PC and PMMA into a base material with a proper size, wherein the base material is the substrate layer 10 which is in a transparent plate shape at first, and the mobile phone rear shell 100 is obtained by processing the base material in one step, and the thickness of the substrate layer 10 is 0.5mm to 1.0mm, preferably 0.8 mm.
Optionally, film ratio punching is performed on the base plate 10 to obtain hole sites such as positioning holes.
202: and printing the mark.
After the base plate 10 is punched to obtain hole sites such as positioning holes, the punched holes are marked by positioning and printing.
203: offset printing/dip dyeing.
The offset printing is to transfer the picture on the printing plate to the printing stock by the rubber, which can well compensate the unevenness of the surface of the printing stock, fully transfer the ink, reduce the transfer of the water on the printing plate to the printing stock, and the like.
The dip dyeing is to dip the material to be dyed in a dye bath containing the dye and the required auxiliaries, and gradually dye the material to be dyed through the circulation of the dye bath or the movement of the material to be dyed.
The multicolor or gradient color effect can be obtained through the offset printing or dip dyeing process, and the requirement of aesthetic property is met.
In this embodiment, the semi-permeable color layer 20 can be obtained by offset printing or dip dyeing. In other embodiments, this step may be omitted if a multi-color or gradient effect is not desired.
204: and (4) UV transfer printing.
The UV transfer printing process is also called UV filling process or UV coating process, and utilizes the non-stick characteristic of UV transfer printing glue and metal to transfer the ultrathin key effect of various mobile phones to PET or PC sheet material by means of UV transfer printing process so as to obtain the effects of CD grain, hard wire drawing, matte surface and bright surface grain, etc.
In the present embodiment, the UV transfer layer 30 can be obtained by a process step of UV transfer, and the texture of the UV transfer layer 30 is usually about 10um thick.
205: and plating an optical film.
The optical film plating is a technological process for plating a film on the surface of a part, and the purpose of plating the film on the surface of the part is to meet the requirements of reducing or increasing light reflection, beam splitting, color separation, light filtering, polarization and the like.
Further, the plating substance may be a titanium compound, a magnesium compound, or other compounds, and in this embodiment, the plating substance is selected from a titanium compound, such as a mixed oxide of Ti3O5+ sio 2.
In this embodiment, the brightness enhancing layer 40 is obtained by the process of plating an optical film, and has a thickness of 50nm to 200nm, and in practical applications, the thickness is selected according to the color.
206: printing a background color and covering the background.
After the raw material is cut, the cut part is subjected to film ratio punching to obtain a positioning hole, when the base color and the cover bottom are printed, the positioning hole obtained through punching is positioned, the base material coated with the optical film is subjected to color and cover bottom treatment, and the printing cover bottom color embossing texture is covered.
This process step can obtain through printing ground colour and lid end printing ink layer 50, printing ink layer 50 includes colour printing ink layer 501 and lid end printing ink layer 502, colour printing ink layer 501 is the one deck, and thickness is 10um to 12um, lid end printing ink layer 502 is three-layer or four-layer, each layer the thickness of lid end printing ink layer 502 is about 10um, consequently, the thickness of printing ink layer is 40um to 52 um.
In this embodiment, after the step of printing the mark, the steps of offset printing/dip dyeing, UV transfer printing, optical film plating, and the like are performed, and then the steps of printing the ground color and covering the ground are performed.
In some embodiments, after the step of printing the indicia, an offset/dip step is performed followed by a step of printing the base color and the cover bottom, omitting both the steps of UV transfer and plating the optical film.
In other embodiments, after the step of printing the indicia, the steps of UV transfer and optical film plating are performed, followed by the steps of printing the base color and covering the base, eliminating the offset/dip step.
207: eye-dropping/stretching the groove.
This step is primarily a draw tank process, prepared for the subsequent steps to ensure that the substrate has a surface finish of less than 0.8 and a parallelism of less than 0.05.
208: and (4) hot bending and forming.
The hot bending is a high pressure forming process, and a fixed structure with a certain shape can be obtained through the processing technology of the hot bending, and during the process, the surface of the base material needs to be cleaned, and the stretching shape, the radian and the cracks are particularly controlled.
The backshell of cell-phone need be processed at the junction of four edges and edges usually when the design, forms the arc, on the one hand, can be so that the backshell that processing made is comparatively pleasing to the eye in the appearance, and on the other hand, because the edge of backshell and edge junction are the arc for whole backshell forms an accepting groove, and after the backshell and the preceding shell of cell-phone are connected fixedly, can be so that the inside confined accommodating space that forms of cell-phone for electronic components and parts and some structures are acceptd in the installation.
In this embodiment, the thermal bending process is performed to obtain a rounded corner portion, also referred to as an R-corner portion, of the mobile phone rear case 100, the R-corner portion is embodied at a connection portion between four side edges and an edge of the mobile phone rear case 100, and during processing, the stretching is gradually thinned from the R-corner, the thinning range at the top end is about 0.05mm, and different thicknesses and different plates have variations.
209: and (4) spray coating.
The curtain coating is hardening treatment for increasing the surface hardness to increase the hardness of the whole base material, a UV type curtain coating wear-resistant hardened coating liquid is generally adopted, a nozzle of a curtain coating device is in curtain coating from left to right on the same horizontal line, after the curtain coating is finished, the base material is kept to vertically run for about 2min, so that the surface of the base material has a free volatilization and leveling stage, then the base material enters a drying tunnel at the temperature of 60-70 ℃ to be kept vertically heated for 5min, and then the base material enters an ultraviolet curing lamp area to be conventionally cured after being heated, the specific curing time is regulated according to the energy of the lamp, the time is properly prolonged, the improvement of the film hardness is facilitated, and after the curing is finished, the plate is directly cooled to.
In this embodiment, the hardened layer 60 can be obtained by a curtain coating process, and the hardened layer 60 covers the substrate layer 10, so that the hardness of the mobile phone rear case 100 can be increased, and the hardness is 2H to 4H.
210: and (6) CNC machining.
Some through holes of the rear case 100 of the mobile phone, for example, side key holes and camera holes on the rear case 100 of the mobile phone, etc., may be made by CNC machining.
After the above steps are completed, the mobile phone rear case 100 is obtained, and quality inspection, a protective film attachment, and the like are performed on the obtained mobile phone rear case 100.
Referring to fig. 4 and 5 together, fig. 4 and 5 are two structural design tables of the mobile phone back shell, that is, two structural design schemes of the mobile phone back shell 100, respectively, including a structural type one and a structural type two, where the structural type one and the structural type two are both prepared by the flowchart of the preparation method of fig. 3.
Specifically, the first structure type and the second structure type both show the portion of the mobile phone rear case 100 with the R-angle bent at four sides, and different designs may make the portion with the R-angle have different shapes.
In the two figures, H1 is the stretching depth, H2 is the thickness of the mobile phone rear case 100, H3 is the C angle formed by the stretched edge of the base material, R is the bending radian radius, and a is the draft angle, wherein the C angle formed by the stretched edge of the base material of H3 is formed by the base material itself in the processing process, and does not need to be considered here.
Referring to fig. 4, when the substrate is electroplated in appearance, made of a compound of PC and PMMA, and subjected to embossing electroplating and printing, H1 is set to be 0-4.0mm, and R is set to be greater than or equal to 3, or H1 is set to be 4.0-6.0mm, R is set to be greater than or equal to 5, H2 is set to be greater than or equal to 0.8mm, H3 is set to be greater than or equal to 0.2mm, a is set to be greater than or equal to 3 degrees, and flatness is set to be less than or equal to 1.0, the first structure type can be obtained through a series of processes.
When the appearance of the substrate is non-electroplated, the material is a compound of PC and PMMA, and printing is performed, H1 is set to be 0-4.0mm, and R is correspondingly set to be greater than or equal to 3, or H1 is set to be 4.0-7.0mm, R is correspondingly set to be greater than or equal to 5, H2 is set to be greater than or equal to 0.8mm, H3 is set to be greater than or equal to 0.2mm, A is set to be greater than or equal to 3 degrees, and flatness is set to be less than or equal to 1.0, the structure type I can also be prepared through a series of processing procedures.
It should be noted that, when a certain value is out of the corresponding set range during processing, the first structure type cannot be obtained.
Referring to fig. 5, when the substrate is plated in appearance, made of a compound of PC and PMMA, and is subjected to embossing plating and printing, H1 is set to 0 to 4.0mm, and R is set to 3 or more, or H1 is set to 4.0 to 6.0mm, R is set to 5 or more, H2 is set to 0.8mm or more, H3 is set to 0.2mm or more, a is set to 0.8 degrees or less, and flatness is set to 1.0 or less, the structure type two can be manufactured through a series of processes.
When the appearance of the substrate is electroplated, the material is a compound of PC and PMMA, and printing is performed, H1 is set to be 0-4.0mm, R is correspondingly set to be more than or equal to 3, or H1 is set to be 4.0-7.0mm, R is correspondingly set to be more than or equal to 5, H2 is set to be more than or equal to 0.8mm, H3 is set to be more than or equal to 0.2mm, A is set to be less than or equal to 0.8 degrees, and the planeness is set to be less than or equal to 1.0, the structure type II can be prepared through a series of processing procedures.
It should be noted that, during processing, if a certain value is out of the corresponding set range, the structure type two cannot be obtained.
The embodiment of the application provides a preparation method of cell-phone backshell and cell-phone backshell thereof, wherein, cell-phone backshell 100's preparation method does, obtains the material through cutting down raw and other materials and be PC and PMMA mixture and be transparent platelike substrate, makes through offset printing or dip-dyeing processing the substrate is polychrome or gradual change colour, handles through printing bottom colour and lid and makes the shading is realized to the substrate, handles through the hot bending shaping and makes the edge of substrate forms the fillet. By the processing mode, the base material made of the transparent material is selected as the processing basis, and the mobile phone rear shell 100 is manufactured by the subsequent offset printing or dip dyeing treatment, the printing ground color and covering ground treatment and the hot bending forming treatment, so that the manufactured mobile phone rear shell 100 is made of the material with texture close to that of glass or ceramic, the shielding and interference of a metal rear shell on mobile phone signals are further avoided, and the transmission frequency of the mobile phone signals is ensured.
It should be noted that, the mobile phone rear case 100 of the present application is actually manufactured by the Unibody technology, and by combining the technology and controlling some processing data, on one hand, the mobile phone rear case 100 with texture close to that of glass or ceramic material is manufactured, so that shielding and interference of a metal rear case to signals can be avoided. On the other hand, the integration of the rear shell and the middle frame of the mobile phone can be realized, the structure of the middle frame is omitted, the accommodating space in the mobile phone can be enlarged, and the material and the processing cost are saved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (10)
1. A preparation method of a mobile phone rear shell is characterized by comprising the following steps:
cutting raw materials to obtain a transparent plate-shaped base material made of a mixture of PC and PMMA;
making the substrate in multicolor or gradient color through offset printing or dip dyeing treatment;
the base material has a certain color and is shielded from light through printing a ground color and covering and priming treatment;
the edges of the substrate are rounded by a hot roll forming process.
2. The method according to claim 1, wherein after the substrate in a transparent plate shape is obtained by the cutting raw material treatment, before the substrate is multicolor or gradient-colored by the offset printing or exhaust treatment, the method further comprises:
punching the base material through film comparison to obtain a positioning hole;
and printing marks on the positioning holes through printing mark processing.
3. The method for preparing a light-shielding film according to claim 1, wherein after the substrate is colored in multi-color or gradient color by offset printing or dip dyeing, before the substrate is shaded by under-color printing and under-cover treatment, the method further comprises:
texturing the substrate by a UV transfer process;
brightening the substrate is achieved by optical film coating treatment.
4. The method for preparing a light-shielding film according to claim 1, wherein after the substrate is shaded by the printing of the ground color and the cover bottom treatment, before the edge of the substrate is rounded by the thermal bend molding treatment, the method further comprises:
the substrate is subjected to a stretching bath treatment by an eyedrop/stretching bath treatment.
5. The method of manufacturing according to claim 1, wherein after the edge of the base material is rounded by the hot roll forming process, the method further comprises:
the hardness of the base material is increased by a curtain coating treatment.
6. The method of manufacturing according to claim 1, wherein after the edge of the base material is rounded by the hot roll forming process, the method further comprises:
the substrate is provided with side key holes and camera holes by CNC machining.
7. The mobile phone back shell is characterized by being prepared by the preparation method of claims 1 to 6, and comprises a substrate layer, a semi-transparent color layer and an ink layer which are sequentially arranged from top to bottom, wherein the substrate layer is obtained by processing cut raw materials, the semi-transparent color layer is obtained by offset printing or dip dyeing, and the ink layer is obtained by printing a bottom color and covering the bottom.
8. The handset back case of claim 7, further comprising:
a UV transfer layer obtained by UV transfer treatment;
the brightening layer is obtained by plating an optical film;
the UV transfer printing layer and the brightening layer are both positioned between the semi-transparent color layer and the ink layer, the UV transfer printing layer is connected with the semi-transparent color layer, and the brightening layer is connected with the ink layer.
9. The phone back cover of claim 8, wherein the ink layers comprise a color ink layer and a bottom-of-cover ink layer in communication, wherein the color ink layer and the brightness enhancing layer are in communication.
10. The mobile phone backshell of claim 7, wherein the mobile phone backshell further comprises a hardening layer, the hardening layer is obtained by curtain coating, the hardening layer is connected with the substrate layer, and the hardening layer and the semi-transparent color layer are respectively located on two opposite surfaces of the substrate layer.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN114189578A (en) * | 2021-12-08 | 2022-03-15 | 东莞市聚龙高科电子技术有限公司 | Mobile phone rear cover with composite board with gradually-changed effect and preparation method thereof |
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Application publication date: 20200529 |