CN110913614A - Middle frame, preparation method thereof and electronic equipment - Google Patents
Middle frame, preparation method thereof and electronic equipment Download PDFInfo
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- CN110913614A CN110913614A CN201911279946.5A CN201911279946A CN110913614A CN 110913614 A CN110913614 A CN 110913614A CN 201911279946 A CN201911279946 A CN 201911279946A CN 110913614 A CN110913614 A CN 110913614A
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- 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
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Abstract
The application provides a middle frame, a preparation method of the middle frame and electronic equipment. The center frame includes: the plastic substrate is sequentially divided into a first section area and a second section area in the width direction; the metal coating is arranged on one side of the outer surface of the plastic base material, and the orthographic projection of the metal coating on the plastic base material covers the first section area and the second section area; and the transparent colored paint layer is arranged on one side of the metal coating layer, which is far away from the plastic substrate, and the orthographic projection of the transparent colored paint layer on the plastic substrate is overlapped with the first section area. Therefore, the appearance color corresponding to the first section area of the middle frame is bright and transparent, the bright and transparent color with metal texture can be presented, and the texture of the appearance of the middle frame is improved; the transparent colored paint is not arranged in the right corresponding area of the second section area, so that the edge of the middle frame is bright metal, the appearance of the middle frame can be decorated, the texture and the visual impact of the middle frame are improved, and the middle frame is lighter and thinner visually.
Description
Technical Field
The application relates to the technical field of electronic equipment, in particular to a middle frame, a preparation method of the middle frame and the electronic equipment.
Background
At present, the base material of the middle frame of the shell of the electronic equipment is generally metal and plastic, when the plastic is adopted, the appearance color of the middle frame is generally realized by spraying real color paint, but the color vividness of the real color paint is poor, so that the appearance effect of the middle frame is relatively rigid, the texture is poor, the thickness sense of the middle frame is relatively strong, and the appearance effect of the electronic equipment is seriously influenced.
Therefore, research on the middle frame of the electronic device is awaited.
Disclosure of Invention
The present application is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, an object of the present application is to provide a middle frame that is visually thin and light.
In one aspect of the present application, a center is provided. According to an embodiment of the application, the middle frame comprises: the plastic substrate is sequentially divided into a first section area and a second section area in the width direction; the metal coating is arranged on one side of the outer surface of the plastic base material, and the orthographic projection of the metal coating on the plastic base material covers the first section area and the second section area; and the transparent colored paint layer is arranged on one side of the plastic substrate, away from the metal coating, and the orthographic projection of the transparent colored paint layer on the plastic substrate is overlapped with the first section of area. Therefore, the transparent paint layer has high permeability, and the metallic luster of the metal coating layer cannot be covered, so that the appearance color corresponding to the first section area of the middle frame is bright and transparent, and the appearance of the middle frame can present bright and transparent color with metallic texture by combining the highlight effect of the metal coating layer, and the appearance texture of the middle frame is greatly improved; further, the second section district just corresponds the region and does not set up transparent color paint, direct expression is the colour of metallic coating in the outward appearance of center, so make the outward appearance of center show two kinds of colours, be the colour of the transparent color paint that first section district corresponds and the metallic coating that the second section district corresponds respectively, so, the edge of center is a bright metallic color (for example bright silver), not only can decorate the outward appearance of center, make it more pleasing to the eye, promote the feel and the visual impact of center, but also can make the center more frivolous in the vision, can attenuate the thickness of center promptly in the vision, make the whole more exquisite of outward appearance of center.
In another aspect of the present application, a method of making a middle frame is provided. According to an embodiment of the present application, a method of manufacturing a middle frame includes: providing a plastic substrate, wherein the plastic substrate is sequentially divided into a first section area and a second section area in the width direction; forming a metal coating on one side of the outer surface of the plastic substrate, wherein the orthographic projection of the metal coating on the plastic substrate covers the first section area and the second section area; forming a whole transparent color paint layer on one side of the metal coating layer away from the plastic substrate; and removing the part of the whole transparent colored paint layer corresponding to the second section area so as to form the transparent colored paint layer, wherein the orthographic projection of the transparent colored paint layer on the plastic substrate is overlapped with the first section area. Therefore, the transparent paint layer has high permeability, and the metal luster of the metal coating layer cannot be covered, so that the color of the first section area of the middle frame is bright, the metal texture of the middle frame is strong, and the appearance texture of the middle frame is greatly improved; moreover, the region corresponding to the second section of area is not provided with transparent colored paint, and the color of the metal coating is directly expressed on the appearance of the middle frame, so that the appearance of the middle frame is expressed into two colors, namely the color of the transparent colored paint corresponding to the first section of area and the metal color of the metal coating corresponding to the second section of area, wherein the metal color can not only decorate the appearance of the middle frame and make the middle frame more beautiful, but also make the middle frame thinner visually, namely the thickness of the middle frame can be thinned visually, and the whole appearance of the middle frame is more delicate; moreover, the preparation method is simple, the process is mature, and the industrial production is facilitated.
In yet another aspect of the present application, an electronic device is provided. According to an embodiment of the present application, the electronic device includes: a rear cover; the middle frame is arranged at the edge of the rear cover in a surrounding manner and is connected with the rear cover, and the second section area of the plastic base material in the middle frame is far away from the rear cover; the display screen assembly is connected with one side, far away from the rear cover, of the middle frame, and an installation space is defined between the display screen assembly and the rear cover; and the mainboard is arranged in the installation space and is electrically connected with the display screen assembly. Therefore, the middle frame of the electronic equipment has bright and transparent appearance color and strong metal texture; moreover, the edge of the middle frame is provided with a metal color (such as bright silver), so that the middle frame is lighter and thinner visually, the appearance is more delicate, and the overall expressive force of the appearance of the electronic product can be improved. Those skilled in the art will appreciate that the electronic device has all the features and advantages of the foregoing middle frame, and thus, the detailed description thereof is omitted.
Drawings
Fig. 1 is a schematic structural diagram of a middle frame in an embodiment of the present application.
FIG. 2 is a schematic cross-sectional view along AA' of FIG. 1.
Fig. 3 is a schematic structural diagram of a middle frame in another embodiment of the present application.
Fig. 4 is a schematic structural diagram of a middle frame in another embodiment of the present application.
FIG. 5 is a flow chart of a method for making a middle box in another embodiment of the present application.
FIG. 6 is a flow chart of the structure of a preparation middle frame in another embodiment of the present application.
FIG. 7 is a flow chart of the structure of a preparation middle frame in another embodiment of the present application.
FIG. 8 is a flow chart of the structure of a preparation middle frame in another embodiment of the present application.
FIG. 9 is a flow chart of the structure of a preparation middle frame in another embodiment of the present application.
FIG. 10 is a flow chart of the structure of a preparation middle frame in another embodiment of the present application.
Fig. 11 is a schematic structural diagram of an electronic device in another embodiment of the present application.
Detailed Description
Embodiments of the present application are described in detail below. The following description of the embodiments is merely exemplary in nature and is in no way intended to limit the present disclosure. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
In one aspect of the present application, a center is provided. Referring to fig. 1 and 2 (fig. 2 is a cross-sectional view along AA' in fig. 1), the middle frame 100 includes: the plastic substrate 10, the plastic substrate 10 is divided into a first section S1 and a second section S2 in sequence in the width direction; the metal coating 20 is arranged on one side of the outer surface of the plastic base material 10, and the orthographic projection of the metal coating 20 on the plastic base material 10 covers the first section S1 and the second section S2; and the transparent colored paint layer 30, the transparent colored paint layer 30 is arranged on one side of the metal coating layer 20 far away from the plastic substrate 10, and the orthographic projection of the transparent colored paint layer 30 on the plastic substrate 10 is overlapped with the first section S1. Therefore, the transparent paint layer has high permeability, and the metallic luster of the metal coating layer cannot be covered, so that the appearance color corresponding to the first section area of the middle frame is bright and transparent, and the appearance of the middle frame can present bright and transparent color with metallic texture by combining the highlight effect of the metal coating layer, and the appearance texture of the middle frame is greatly improved; further, the second section district just corresponds the region and does not set up transparent color paint, direct expression is the colour of metallic coating in the outward appearance of center, so make the outward appearance of center show two kinds of colours, be the colour of the transparent color paint that first section district corresponds and the metallic coating that the second section district corresponds respectively, so, the edge of center is a bright metallic color (for example bright silver), not only can decorate the outward appearance of center, make it more pleasing to the eye, promote the feel and the visual impact of center, but also can make the center more frivolous in the vision, can attenuate the thickness of center promptly in the vision, make the whole more exquisite of outward appearance of center.
The outer surface of the plastic base material is the surface close to the appearance surface when the middle frame is used; the "width direction" refers to a direction perpendicular to the direction in which the laminated structures in the middle frame are stacked and extending in the width direction of each laminated structure, or, as shown in fig. 1, a direction perpendicular to a horizontal plane when the middle frame is laid flat on the horizontal plane.
The material of the plastic substrate includes, but is not limited to, at least one of PC (polycarbonate), PMMA (polymethyl methacrylate), PET (polyethylene terephthalate), and TPU (thermoplastic polyurethane elastomer). Therefore, the material has the advantages of wide source, low cost and high strength, and can meet the requirement of the middle frame on mechanical strength.
Further, the width of the second section S2 is 1-3 mm, such as 1 mm, 1.5 mm, 2 mm, 2.5 mm or 3 mm. Therefore, the second section of the width is narrower, so that the edge of one side of the middle frame presents a bright metal color, the thickness of the middle frame can be reduced visually, the light and thin middle frame is realized, and the middle frame is more delicate; moreover, the appearance surface corresponding to the first section area is the main body appearance, the main body appearance color is the color of transparent colored paint, and the narrow second section area can not cause the main body appearance color to lose the texture, so that the texture of the main body appearance color and the realization of a bright metal color frame can be better considered, and the visual effect of the middle frame is more attractive, lighter and thinner; if the width of the second section S2 is less than 1 mm, the metal color of the edge of the middle frame is not obvious, the thinning feeling of the middle frame is relatively unobvious visually, and the visual impact is relatively weak; if the width of the second segment S2 is greater than 3 mm, the appearance color quality of the main body is affected, the overall appearance effect of the middle frame is reduced, and the light and thin quality of the middle frame is relatively reduced, resulting in poor product performance.
Further, specific materials of the metal plating layer include, but are not limited to, at least one of aluminum, indium, tin, indium-tin alloy, silver, and molybdenum. Therefore, the material not only can have a certain covering effect on the plastic base material so as to prevent the color of the plastic base material from influencing the appearance color effect of the transparent colored paint, but also can show an obvious metal color in the appearance corresponding to the second section area, for example, when the metal plating layer is aluminum or indium, the appearance corresponding to the second section area is a bright silver color.
The thickness of the metal coating is 100-200 nm, such as 100 nm, 120 nm, 140 nm, 160 nm, 180 nm or 200 nm. Therefore, the metal plating layer with the thickness can enable the appearance of the middle frame to show good metal texture, is convenient to prepare, and does not cause adverse effects on the electrical performance of electronic equipment using the middle frame.
Further, the transparent colored paint layer 30 is made of nano colored paint. Therefore, the transparent color paint is bright in color, high in permeability and strong in color expressive force, and can show the bright color with metallic texture by combining the highlight effect of the metal coating. The nano colored paint is formed by mixing nano color paste (organic pigment, the color of the organic pigment is the expression color of the transparent colored paint) and a paint main agent, wherein the nano color paste is generally a metal complex, has transparent and bright color, poor covering power, high color vividness and active expression.
The specific color of the transparent colored paint has no limitation, and the skilled person can flexibly select the transparent colored paint according to the actual situation, and the specific color is not limited herein.
Wherein, if the transparent color paint layer of this application is changed into real color paint layer, and real color paint's hiding power ratio is stronger, then the metallic feel of metal coating can't be shown to the appearance effect, and real color paint's colour vividness is relatively poor moreover, and the performance of colour effect is comparatively rigid, and then leads to the feel of center relatively poor.
Further, the thickness of the transparent color paint layer is 5-10 micrometers, such as 5 micrometers, 6 micrometers, 7 micrometers, 8 micrometers, 9 micrometers or 10 micrometers. Therefore, the color expressive force is better, and the integral thickness of the middle frame is not thicker; if the thickness is less than 5 microns, the appearance color expressive force of the middle frame is relatively poor, the surface smoothness is relatively poor, and the preparation is inconvenient in process; if the thickness is greater than 10 micrometers, the overall thickness of the middle frame is too thick, which is not in accordance with the design concept of lightness and thinness, and the adhesion of the transparent paint layer is relatively poor.
According to an embodiment of the present application, referring to fig. 3, the middle frame further includes: the transparent primer layer 40, the transparent primer layer 40 is arranged on the whole surface of the plastic base material 10 close to the metal coating layer 20; a first transparent intermediate paint layer 50, the first transparent intermediate paint layer 50 being disposed on the entire surface of the metal plating layer 20 away from the plastic substrate 10. Therefore, the adhesive force of the transparent primer layer on the plastic substrate is better, and the bonding force between layers is further improved; the arrangement of the first transparent middle paint layer 50 can effectively prevent the corrosion of water and oxygen to the metal coating, protect the metal coating from being damaged in the process of preparing the transparent color paint layer, and improve the adhesive force of the transparent color paint layer.
Wherein the thickness of the transparent primer layer is 20-30 micrometers, such as 20 micrometers, 22 micrometers, 24 micrometers, 26 micrometers, 28 micrometers or 30 micrometers; the thickness of the first transparent middle paint layer is 10-15 microns, such as 10 microns, 11 microns, 12 microns, 13 microns, 14 microns or 15 microns. Therefore, the performance of the transparent primer layer and the second transparent middle paint layer is better, and the whole thickness of the middle frame is not heavy.
According to an embodiment of the application, the first transparent basecoat layer has a color and is different from the color of the transparent basecoat layer. Therefore, the appearance corresponding to the second section area can present other colors with metal texture, and the light and thin visual effect of the middle frame can be still well realized; moreover, the appearance corresponding to the first section area can show the color of the transparent colored paint layer and the first transparent middle paint layer, so that the appearance color of the diversified middle frame can be enriched.
The "different colors" may refer to two colors of different hues, such as red and blue, or may refer to the same hue, but the colors are different in shade, transparency, and the like, such as dark blue and light blue.
Further, the first transparent intermediate paint layer comprises a colorless transparent paint substrate and nano color paste dispersed in the colorless transparent paint substrate. Therefore, the color of the first transparent middle paint layer can be adjusted by the color of the added nano color paste and the content of the added nano color paste, the color of the nano color paste is bright, the transparency is high, the color expression is strong, and the transparent color paint of the material can present bright colors with metal texture by combining the highlight effect of the metal plating layer.
According to an embodiment of the present application, referring to fig. 4, the middle frame further includes: a second transparent intermediate paint layer 60, wherein the second transparent intermediate paint layer 60 is only arranged on the surface of the transparent color paint layer 30 far away from the plastic base material 10; a transparent top coat layer 70, the transparent top coat layer 70 being disposed on the surface of the second transparent middle coat layer 60 remote from the plastic substrate 10 and on the surface of the first transparent middle coat layer 50 not covered by the transparent color coat layer 30. Thus, the provision of the second transparent intermediate paint layer 60 can protect the transparent color paint layer during the process of preparing the transparent color paint layer; the arrangement of the transparent finish paint layer can improve the performances of scratch resistance, falling resistance and the like of the middle frame.
The terms "first" and "second" are used herein for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
The thickness of the second transparent middle paint layer is 10-15 micrometers, such as 10 micrometers, 11 micrometers, 12 micrometers, 13 micrometers, 14 micrometers or 15 micrometers; the thickness of the transparent finishing paint layer is 20-30 microns, such as 20 microns, 22 microns, 24 microns, 26 microns, 28 microns or 30 microns. From this, the performance of the second transparent middle paint layer and the transparent finish paint layer of above-mentioned thickness is preferred, can promote the stability of center effectively, and above-mentioned thickness can not make the whole of center thick partially.
Those skilled in the art can understand, when being applied to electronic equipment with above-mentioned center, the center sets up around the edge of electronic equipment's back lid, the edge of display screen subassembly links to each other with one side that the back lid was kept away from to the center, according to the embodiment of this application, the back lid setting is kept away from in the second section district that can make the plastic substrate of center, the second section district is close to the display screen subassembly and sets up promptly, so, the user is when using electronic equipment, just has a bright metallic color like the edge of display screen subassembly, not only can decorate the outward appearance effect of center, can also give the user a more strong visual impact, and then make the center comparatively frivolous in vision.
In another aspect of the present application, a method of making a middle frame is provided. According to an embodiment of the present application, referring to fig. 5, a method of preparing a middle frame includes:
s100: a plastic substrate 10 is provided, wherein the plastic substrate is divided into a first section S1 and a second section S2 in the width direction, and the structure diagram is shown in fig. 6.
Wherein, the surface of the plastic base material can be wiped by using a white gasoline solvent in advance, and electrostatic dust collection is carried out to remove oil stains and dust.
S200: the metal plating layer 20 is formed on one side of the outer surface of the plastic substrate 10, and an orthographic projection of the metal plating layer 20 on the plastic substrate 10 covers the first segment S1 and the second segment S2. The structure diagram refers to fig. 6.
Further, the metal plating layer 20 may be formed by a method such as non-conductive sputtering (NCVM), magnetron sputtering, vacuum evaporation, and the like, which is mature in process and convenient for industrial production.
Further, before the metal plating layer 20 is formed, the method further includes: and (3) spraying and forming a transparent primer layer 40 on the whole outer surface of the plastic base material 10 close to the metal plating layer 20, wherein the structural schematic diagram refers to fig. 7. Wherein, the material of the transparent primer layer 40 can be UV type transparent primer, and the UV energy is 600mj/cm in UV curing2～800mj/cm2Therefore, the transparent primer layer with stable performance and structure can be prepared, the adhesive force of the transparent primer layer on the plastic base material is better, and the bonding force between layers is further improved.
Further, after the metal plating layer 20 is formed and before the transparent color paint layer is formed, the method further includes: a first transparent intermediate paint layer 50 is formed by spraying on the whole surface of the metal plating layer 20 away from the plastic substrate 10, and the structural schematic diagram refers to fig. 8. Therefore, the first transparent middle paint layer 50 can effectively prevent the corrosion of water and oxygen to the metal coating, protect the metal coating from being damaged in the subsequent process of preparing the transparent color paint layer, and improve the adhesive force of the transparent color paint layer.
Wherein, the material of the first transparent middle paint layer 50 can be UV type transparent middle paint, and the UV energy is 500mj/cm in UV curing2～700mj/cm2The baking temperature is 50-60 ℃. In this manner, a first transparent basecoat layer 50 can be produced that is stable in performance and structure.
Further, before spraying the first transparent intermediate paint, a certain amount of nano color paste with a color different from that of the transparent color paint layer can be added into the colorless transparent intermediate paint in advance, so that the first transparent intermediate paint layer has a color, namely the first transparent intermediate paint layer comprises a colorless transparent paint substrate and the nano color paste dispersed in the colorless transparent paint substrate. Therefore, the appearance corresponding to the second section area can present other colors with metal texture, and the light and thin visual effect of the middle frame can be still well realized; moreover, the appearance corresponding to the first section S1 can present the color of the combination of the transparent color paint layer and the first transparent middle paint layer, and further the appearance color of the diversified middle frame can be enriched.
The "different colors" may refer to two colors of different hues, such as red and blue, or may refer to the same hue, but the colors are different in shade, transparency, and the like, such as dark blue and light blue.
S300: a full-surface transparent color paint layer 31 is formed on the side of the metal plating layer 20 away from the plastic substrate 10, and the structural schematic diagram refers to fig. 9.
The whole transparent color paint layer is of a thermosetting type (PU type), so that the whole transparent color paint layer with a stable structure can be obtained through thermosetting after the transparent color paint is sprayed, wherein the curing temperature is 60-70 ℃, such as 60 ℃, 62 ℃, 64 ℃, 66 ℃, 68 ℃ and 70 ℃, and the curing time is 5-10 min, such as 5 min, 6 min, 7 min, 8 min, 9 min or 10 min. Therefore, under the conditions, the whole transparent color paint layer with stable structure and performance can be quickly and effectively obtained.
S400: the partial whole transparent color paint layer 31 corresponding to the second segment S2 is removed to form the transparent color paint layer 30, and the orthographic projection of the transparent color paint layer 30 on the plastic substrate 10 overlaps the first segment S1, which is shown in fig. 9. The "front correspondence" in the "removal of the partial entire transparent color paint layer 31 corresponding to the second-stage region S2" means that the front projection of the partial entire transparent color paint layer 31 to be removed on the plastic substrate overlaps with the second-stage region S2.
Further, the removal of the partial entire transparent color paint layer 31 corresponding to the second-stage region S2 is achieved by contacting with an organic swelling solution (as will be understood by those skilled in the art, only the partial entire transparent color paint layer 31 corresponding to the second-stage region S2 is contacted with the organic swelling solution, and the portion not to be removed may not be contacted with the organic swelling solution), wherein the organic swelling solution includes ethylene glycol monobutyl ether and acetone in a volume ratio of 6-8: 2-4 (for example, 6:2, 6:3, 6:4, 7:2, 7:3, 7:4, 8:2, 8:3, etc.). Therefore, because the PU type colored paint has low crosslinking density and solvent intolerance, the PU type colored paint is loosened after being swelled by the organic swelling liquid, and then the swelled transparent colored paint layer 31 with a partial whole surface can be brushed off by the soft hairbrush so as to obtain the transparent colored paint layer 30; moreover, the organic swelling solution with the above composition can rapidly and effectively swell the whole transparent paint layer 31 corresponding to the second segment S2, and will not swell too fast, so as to prevent the organic swelling solution from swelling the whole transparent paint layer 31 corresponding to the first segment S1.
When the first transparent middle paint layer 50 is arranged in the middle frame, the paint material of the first transparent middle paint layer is UV type, and the whole transparent colored paint layer 31 is thermosetting type (PU type), so that the organic swelling solution is used to contact the whole transparent colored paint layer 31, and the first transparent middle paint layer 50 is not swelled (the UV type middle paint has higher crosslinking density and organic solvent resistance (namely, the organic swelling solution is stronger and cannot be swelled by the organic solvent)), so that the metal coating layer 20 can be well prevented from contacting the organic swelling solution, and the purpose of protecting the metal coating layer from being damaged is achieved.
According to the embodiment of the present application, before removing the partial entire transparent color paint layer 31 corresponding to the second segment region S2, the method further includes:
s410: a transparent paint layer 61 is formed on the surface of the whole transparent paint layer 31 far away from the plastic substrate 10, and the structural schematic diagram refers to fig. 10.
The transparent paint layer 61 is made of a UV type transparent intermediate paint, and the transparent paint layer 61 with stable performance and structure can be obtained by heating and curing after the UV type transparent intermediate paint is sprayed on the surface of the whole transparent colored paint layer 31. In UV curing, the UV energy is 500mj/cm2～700mj/cm2The baking temperature is 50-60 ℃. In this way, a second transparent basecoat layer 60 can be produced that is stable in terms of properties and structure.
S420: the portion of the transparent paint layer 61 corresponding to the second segment S2 is removed by laser etching (i.e. the orthographic projection of the portion of the transparent paint layer to be removed on the plastic substrate overlaps the second segment), so as to obtain the second transparent middle paint layer 60, and the orthographic projection of the second transparent middle paint layer 60 on the plastic substrate 10 overlaps the first segment S1, which is shown in fig. 10. Therefore, the second transparent intermediate paint layer 60 is UV type, and has a high crosslinking density and a high organic solvent resistance, and is not swelled by an organic solvent, so the arrangement of the second transparent intermediate paint layer 60 can prevent the organic swelling solution from contacting the entire transparent paint layer 31 corresponding to the first segment S1, thereby achieving the purpose of protecting the transparent paint 30.
After the second transparent intermediate paint layer is obtained through laser etching, the partial entire transparent paint layer 31 (i.e., the partial entire transparent paint layer not covered by the second transparent intermediate paint layer) corresponding to the second segment S2 is contacted with the organic swelling solution, so as to obtain the transparent paint layer 30, where the structural schematic diagram refers to fig. 10.
Further, after removing the partial whole transparent color paint layer corresponding to the second section area, the method further comprises the following steps: a transparent topcoat layer 70 is formed on the surface of the second transparent basecoat layer 60 remote from the plastic substrate 10 and on the surface of the first transparent basecoat layer 50 not covered by the transparent basecoat layer 30, the structural schematic being shown in fig. 4. The arrangement of the transparent finish paint layer can improve the performances of scratch resistance, falling resistance and the like of the middle frame.
According to the embodiment of the application, the transparency of the transparent paint layer is higher in the middle frame prepared by the method, and the metallic luster of the metal coating layer can not be covered, so that the color of the first section area of the middle frame is more gorgeous, the metallic texture of the middle frame is stronger, and the appearance texture of the middle frame is greatly improved; moreover, the region corresponding to the second section of area is not provided with transparent colored paint, and the color of the metal coating is directly expressed on the appearance of the middle frame, so that the appearance of the middle frame is expressed into two colors, namely the color of the transparent colored paint corresponding to the first section of area and the metal color of the metal coating corresponding to the second section of area, wherein the metal color can not only decorate the appearance of the middle frame and make the middle frame more beautiful, but also make the middle frame thinner visually, namely the thickness of the middle frame can be thinned visually, and the whole appearance of the middle frame is more delicate; moreover, the preparation method is simple, the process is mature, and the industrial production is facilitated.
According to an embodiment of the application, the method for manufacturing the middle frame can be used for manufacturing the middle frame, wherein the requirements for the materials, the thicknesses, the setting positions and the like of the structures such as the plastic substrate, the metal plating layer, the transparent colored paint layer, the first transparent middle paint layer, the second transparent middle paint layer, the transparent primer layer, the transparent finish paint layer and the like in the manufacturing method are consistent with the requirements in the middle frame, and the description is omitted here.
In yet another aspect of the present application, an electronic device is provided. According to an embodiment of the present application, referring to fig. 11, the electronic device 1000 includes: a rear cover 200; the middle frame 100 is described above, the middle frame 100 surrounds the edge of the rear cover 200 and is connected to the rear cover 200, and the second section S2 of the plastic substrate 10 in the middle frame 100 is located away from the rear cover 200; the display screen assembly 300 is connected with one side of the middle frame 100, which is far away from the rear cover 200, and an installation space is defined between the display screen assembly 300 and the rear cover 200; and a main board (not shown in the figure) disposed in the installation space and electrically connected to the display screen assembly. Therefore, the middle frame of the electronic equipment has bright and transparent appearance color and strong metal texture; moreover, the edge of the middle frame is provided with a metal color (such as bright silver), so that the middle frame is lighter and thinner visually, the appearance is more delicate, and the overall expressive force of the appearance of the electronic product can be improved. Those skilled in the art will appreciate that the electronic device has all the features and advantages of the foregoing middle frame, and thus, the detailed description thereof is omitted.
In this application, unless expressly stated or limited otherwise, the terms "connected" and "coupled" are to be construed broadly, as they may be, for example, fixedly coupled, detachably coupled, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. 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 specific type of the electronic device is not particularly required, and those skilled in the art can flexibly select the electronic device according to actual situations, and in some embodiments, the electronic device may be a mobile phone (see fig. 11), a kindle, an iPad, a notebook, a game console, or other electronic devices.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (15)
1. An intermediate frame, comprising:
the plastic substrate is sequentially divided into a first section area and a second section area in the width direction;
the metal coating is arranged on one side of the outer surface of the plastic base material, and the orthographic projection of the metal coating on the plastic base material covers the first section area and the second section area; and
transparent color paint layer, transparent color paint layer sets up metal coating keeps away from one side of plastic substrate, just transparent color paint layer is in orthographic projection on the plastic substrate with first section district overlaps.
2. The middle frame of claim 1, wherein the transparent colored paint layer is made of nano colored paint.
3. The middle frame of claim 1, further comprising:
the transparent primer layer is arranged on the whole surface of the plastic substrate close to the metal coating;
the first transparent middle paint layer is arranged on the whole surface of the plastic base material, and the metal coating is far away from the whole surface of the plastic base material.
4. The middle frame of claim 3, further comprising:
the second transparent intermediate paint layer is only arranged on the surface of the transparent color paint layer away from the plastic base material;
the transparent finish paint layer is arranged on the surface of the first transparent middle paint layer, the second transparent middle paint layer is far away from the plastic base material, and the transparent finish paint layer does not cover the surface of the first transparent middle paint layer.
5. The middle frame according to any one of claims 1 to 4, wherein the thickness of the transparent color paint layer is 5 to 10 micrometers, and the thickness of the metal plating layer is 100 to 200 nanometers.
6. The middle frame according to any one of claims 1 to 4, wherein the width of the second segment region is 1 to 3 mm.
7. The middle frame according to any one of claims 1 to 4, wherein the first transparent middle paint layer has a color different from that of the transparent color paint layer.
8. The middle frame according to claim 7, wherein the first transparent middle paint layer comprises a colorless transparent paint base and a nano-mill base dispersed in the colorless transparent paint base.
9. A method of making a bezel comprising:
providing a plastic substrate, wherein the plastic substrate is sequentially divided into a first section area and a second section area in the width direction;
forming a metal coating on one side of the outer surface of the plastic substrate, wherein the orthographic projection of the metal coating on the plastic substrate covers the first section area and the second section area;
forming a whole transparent color paint layer on one side of the metal coating layer away from the plastic substrate;
and removing the part of the whole transparent colored paint layer corresponding to the second section area so as to form the transparent colored paint layer, wherein the orthographic projection of the transparent colored paint layer on the plastic substrate is overlapped with the first section area.
10. The method according to claim 9, wherein the whole transparent color paint layer is of a heat-curing type, wherein the curing temperature is 60 to 70 ℃ and the curing time is 5 to 10 min.
11. The method according to claim 9, wherein the removing of the portion of the transparent full-surface paint layer corresponding to the second section area is performed by contacting with an organic swelling solution, wherein the organic swelling solution comprises ethylene glycol monobutyl ether and acetone in a volume ratio of 6-8: 2-4.
12. The method of any one of claims 9-10, further comprising:
forming a transparent primer layer on the whole surface of the plastic substrate close to the metal coating;
and forming a first transparent intermediate paint layer on the whole surface of the metal coating layer far away from the plastic base material.
13. The method of claim 12, further comprising, prior to removing the portion of the full-face transparent paint layer directly corresponding to the second segment region:
forming a transparent paint layer on the surface of the whole transparent paint layer far away from the plastic base material;
and removing the part of the transparent paint layer which is just corresponding to the second section area through laser engraving so as to obtain a second transparent intermediate paint layer, wherein the orthographic projection of the second transparent intermediate paint layer on the plastic substrate is overlapped with the first section area.
14. The method of claim 13, further comprising, after removing the portion of the full-face transparent paint layer directly corresponding to the second segment region:
and forming a transparent finish paint layer on the surface of the first transparent middle paint layer, which is far away from the plastic base material and is not covered by the transparent color paint layer, of the second transparent middle paint layer.
15. An electronic device, comprising:
a rear cover;
the middle frame of any one of claims 1 to 14, wherein the middle frame is arranged around the edge of the rear cover and is connected with the rear cover, and the second section of the plastic substrate in the middle frame is arranged far away from the rear cover;
the display screen assembly is connected with one side, far away from the rear cover, of the middle frame, and an installation space is defined between the display screen assembly and the rear cover; and
the mainboard is arranged in the installation space and electrically connected with the display screen assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911279946.5A CN110913614A (en) | 2019-12-13 | 2019-12-13 | Middle frame, preparation method thereof and electronic equipment |
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| CN201911279946.5A CN110913614A (en) | 2019-12-13 | 2019-12-13 | Middle frame, preparation method thereof and electronic equipment |
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