CN111587019A - Shell assembly, manufacturing method thereof and electronic equipment - Google Patents
Shell assembly, manufacturing method thereof and electronic equipment Download PDFInfo
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- CN111587019A CN111587019A CN202010521589.5A CN202010521589A CN111587019A CN 111587019 A CN111587019 A CN 111587019A CN 202010521589 A CN202010521589 A CN 202010521589A CN 111587019 A CN111587019 A CN 111587019A
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- layer
- shell
- assembly
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- texture
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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
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
- H05K5/0243—Mechanical details of casings for decorative purposes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44F—SPECIAL DESIGNS OR PICTURES
- B44F1/00—Designs or pictures characterised by special or unusual light effects
- B44F1/08—Designs or pictures characterised by special or unusual light effects characterised by colour effects
- B44F1/10—Changing, amusing, or secret pictures
Abstract
The application provides a shell assembly, which comprises a shell substrate, wherein the shell substrate comprises a first surface and a second surface which are oppositely arranged, a gloss oil layer, a first texture layer, a color layer and a bottom covering ink layer are sequentially arranged on the first surface, and one side surface, close to the color layer, of the first texture layer comprises a plurality of protrusions and/or grooves which are arranged in an array manner; the color layer is formed by a UV spray painting process. The shell assembly can solve the problems that the appearance performance is poor and the film layer structure is easy to fall off in the existing shell assembly. The application also provides a manufacturing method of the shell assembly and electronic equipment.
Description
Technical Field
The application relates to the technical field of electronic equipment, in particular to a shell assembly, a manufacturing method thereof and electronic equipment.
Background
With the popularization and development of electronic devices such as mobile phones, consumers have higher and higher requirements for the appearance expressive force of the housing components. Most of color layers of the existing shell assembly only contain two gradient colors, the gradient mode is single, noise is obvious, and the appearance expressive force is not strong. Moreover, the film layers in the shell assembly are easy to fall off, and the aesthetic property of the shell assembly is seriously influenced.
Disclosure of Invention
The application provides a shell assembly, a manufacturing method thereof and electronic equipment; the problem that the appearance is poor and the film structures are easy to fall off in the existing shell assembly can be solved. The technical scheme is as follows:
in a first aspect, the application provides a housing assembly, which includes a housing substrate, wherein the housing substrate includes a first surface and a second surface that are arranged oppositely, the first surface is sequentially provided with a gloss oil layer, a first texture layer, a color layer and a bottom-covering ink layer, and one side surface of the first texture layer, which is close to the color layer, includes a plurality of protrusions and/or grooves arranged in an array; the color layer is formed by a UV spray painting process.
In a second aspect, the present application provides a method of making a housing assembly, comprising the steps of:
providing a shell substrate;
forming a gloss oil layer and a first texture layer on the surface of one side of the shell substrate, forming a color layer on the first texture layer through a UV (ultraviolet) spray painting process, and then forming a bottom-covering ink layer on the color layer, wherein the surface of one side, close to the color layer, of the first texture layer comprises a plurality of bulges and/or grooves which are arranged in an array manner;
forming the curved surface of the shell substrate by adopting a high-pressure forming process to obtain a semi-finished shell assembly;
and performing strengthening treatment and CNC machining on the semi-finished product of the shell assembly to obtain the shell assembly.
In a third aspect, the present application further provides a method for manufacturing a housing assembly, including the following steps:
providing a bearing plate;
forming a gloss oil layer and a first texture layer on the surface of one side of the bearing plate, forming a color layer on the first texture layer through a UV (ultraviolet) spray painting process, and then forming a bottom covering ink layer on the color layer, wherein the surface of one side, close to the color layer, of the first texture layer comprises a plurality of bulges and/or grooves which are arranged in an array manner;
providing a shell substrate with a curved surface, stripping the bearing plate, and bonding the gloss oil layer on one side surface of the shell substrate to obtain a semi-finished shell assembly;
and performing strengthening treatment and CNC machining on the semi-finished product of the shell assembly to obtain the shell assembly.
In a fourth aspect, the present application provides an electronic device, comprising:
a housing assembly according to the first aspect or made by the method of manufacture of the second or third aspects;
a display assembly coupled to the housing assembly.
According to the shell assembly, the color layer in the shell assembly is formed by a UV (ultraviolet) spray painting process, the color layer is high in definition of colors and patterns, low in color noise, and richer in color types and gradient effect; set up protruding and/or groove structure and the gloss oil layer that a plurality of arrays were arranged on first texture layer surface, can make to promote that adhesive force is stronger between each membranous layer structure including colour layer, first texture layer in the casing subassembly, have high reliability, can effectively avoid appearing the layering risk that drops, increase of service life.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described 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 housing assembly 100 according to an embodiment of the present disclosure;
fig. 2 is a sectional view along a-a of a housing assembly 100 according to an embodiment of the present disclosure;
FIG. 3 is a schematic view of a portion A of the housing assembly 100 of FIG. 2 in a cross-sectional view taken along A-A in accordance with an exemplary embodiment of the present disclosure;
FIG. 4 is a schematic top view of a first textured layer of a shell assembly according to an embodiment of the present disclosure;
FIG. 5 is a cross-sectional view taken along A-A of a housing assembly 200 according to an embodiment of the present disclosure;
FIG. 6 is a cross-sectional view taken along A-A of a housing assembly 300 according to an exemplary embodiment of the present disclosure;
FIG. 7 is a cross-sectional view taken along A-A of a housing assembly 400 according to an exemplary embodiment of the present disclosure;
FIG. 8 is a process flow diagram of a method of making a housing assembly according to an embodiment of the present disclosure;
FIG. 9 is a process flow diagram of another method of fabricating a housing assembly according to an embodiment of the present disclosure;
fig. 10 is a schematic structural diagram of an electronic device 500 according to an embodiment of the present application.
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. The embodiments listed in the present application may be appropriately combined with each other.
As shown in fig. 1, fig. 2 and fig. 3, an embodiment of the present application provides a housing assembly 100, which includes a housing substrate 10, where the housing substrate 10 includes a first surface 11 and a second surface 12 that are oppositely disposed, a gloss oil layer 20, a first texture layer 30, a color layer 40 and a bottom-covering ink layer 50 are sequentially disposed on the first surface 11, and a surface of one side of the first texture layer 30, which is close to the color layer 40, includes a plurality of protrusions 31 and/or grooves 32 that are arranged in an array; the color layer 40 is formed by a UV spray process.
In the embodiment of the present application, the housing substrate 10 is a transparent plate, and has high light transmittance. The material of the housing substrate 10 includes one or more of Polycarbonate (PC), polyethylene terephthalate (PET), polymethyl methacrylate (PMMA) and glass. Optionally, the housing substrate may be, but not limited to, a PC board, a PET board, a PC and PMMA composite board, a PET and PMMA composite board, or glass. The PC and PMMA composite board is a composite board consisting of at least one PC layer and at least one PMMA layer. For example, the composite plate is a PC/PMMA double-layer structure. Optionally, the housing substrate is in one of a 2D, 2.5D and 3D configuration. When the shell substrate is in a 3D form, the first surface of the shell substrate is the inner side surface of the shell substrate, the second surface of the shell substrate is the outer side surface of the shell substrate, and the outer side surface is a convex curved surface. When the shell substrate is a PC and PMMA composite board, the first surface is a PC surface. Optionally, the thickness of the housing substrate is 0.25-1.0 mm. Further, optionally, the thickness of the housing substrate is 0.4-0.7 mm. In one embodiment, the housing substrate is a PC and PMMA composite board, and the thickness of the housing substrate is 0.64mm, wherein the PC layer is 0.59mm, and the PMMA layer is 0.05 mm.
In the embodiment of the application, on the first texture layer, the lateral dimension of the protrusions is 0.1-200 μm, and the height of the protrusions is 0.1-5 μm. In one embodiment, the lateral dimension of the protrusions is 1-150 μm and the height of the protrusions is 1-4 μm. In another embodiment, the projections have a lateral dimension of 10-150 μm and the projections have a height of 2-4 μm. In a third embodiment, the lateral dimension of the protrusions is 50-150 μm and the height of the protrusions is 2-4 μm. Optionally, on the first texture layer, the lateral dimension of the groove opening is 0.1-200 μm, and the depth of the groove is 0.1-5 μm. In one embodiment, the lateral dimension of the groove opening is 1-150 μm and the depth of the groove is 1-5 μm. In another embodiment, the lateral dimension of the groove opening is 10-150 μm and the depth of the groove is 1-4 μm. In a third embodiment, the lateral dimension of the groove opening is 50-150 μm and the depth of the groove is 2-4 μm. In the embodiment of the present application, the color layer 40 completely covers the protrusion and/or groove structure on the surface of the first texture layer; the thickness of the color layer is greater than the height of the protrusions 31 of the first texture layer 30. When the surface of the first texture layer contains the groove, the color layer can fill the groove and cover the first texture layer. The protruding and/or groove structure within the size range can greatly increase the connection area between the color layer formed by the UV spray painting process and the first texture layer, and can further improve the adhesive force between the color layer and the first texture layer; the convex and/or concave structures within the size range are beneficial to forming the color layer through a UV (ultraviolet) spray painting process, the formed color layer can be uniformly filled and tightly attached, and the appearance effect is better; the filling unevenness between the color layer and the first texture layer is avoided.
In the embodiment of the present application, the lateral dimensions and heights of the protrusions arranged in the plurality of arrays on the first texture layer may be the same or different. The lateral dimension and the height of the grooves arranged in the plurality of arrays on the first texture layer can be the same or different. For example, the plurality of protrusions arranged in an array may have respective lateral dimensions and heights that gradually decrease. On the first texture layer, the cross-sectional shapes of the protrusions and the grooves in the direction parallel to the first texture layer respectively comprise one or more of a circle, a triangle, a quadrangle and a polygon. Wherein the cross-sectional shape of the protrusions in a direction parallel to the first texture layer may be, but is not limited to, one or more of a circle, a triangle, a quadrangle, and a polygon; the cross-sectional shape of the grooves in a direction parallel to the first texture layer may be, but is not limited to, one or more of a circle, a triangle, a quadrangle, and a polygon. The polygon herein refers to a polygon having a number of sides of 5 or more. The cross-sectional shape of all the protrusions or all the groove structures on the first texture layer may be the same, or may be a combination of various patterns. When the first texture layer is provided with the protrusion and groove structures, the cross-sectional shapes of the protrusion and the groove can be the same or different. Referring to fig. 4, fig. 4 is a schematic structural diagram of a surface of the first texture layer, and fig. 4 (a) - (f) respectively show specific shapes and arrangement forms of the protrusions and/or the grooves, wherein the cross-sectional shape of the protrusions and/or the grooves in (a) is a triangle; (b) the cross section of the bulge and/or the groove in the middle is pentagonal; (c) the cross section of the protrusion and/or the groove in (1) is a combination of a triangle, a pentagon, a quadrangle and a circle; (d) the cross section of the bulge and/or the groove in the middle is circular; (e) the cross section of the bulge and/or the groove in the middle is quadrilateral, in particular square; (f) the cross-sectional shape of the protrusion and/or the groove in (1) is a circle gradually decreasing from the middle to both sides. In this application, the concrete shape and the form of arranging of arch and/or recess on the first texture layer can also be adjusted based on actual requirement, both satisfied structure size demand, can obtain abundant outward appearance effect again.
In the embodiment of the application, the distance between any adjacent protrusions, any adjacent grooves, or any adjacent protrusions and grooves is 0.05-400 μm. In one embodiment, the distance between any adjacent protrusions, any adjacent grooves, or any adjacent protrusion and groove is 1-400 μm. In another embodiment, the pitch between any adjacent protrusions, between any adjacent grooves, or between any adjacent protrusions and grooves is 10 to 300 μm. In a third embodiment, the pitch between any adjacent protrusions, between any adjacent grooves, or between any adjacent protrusions and grooves is 20 to 200 μm. Optionally, the distance between any adjacent protrusions is 0.5-2 times the lateral dimension of the protrusions, and the distance between any adjacent grooves is 0.5-2 times the lateral dimension of the grooves. In one embodiment, the distance between any adjacent protrusions is 1-2 times the lateral dimension of the protrusions, and the distance between any adjacent grooves is 1-2 times the lateral dimension of the grooves. The interval range between any adjacent bulges and/or grooves on the surface of the first texture layer is beneficial to uniform filling and close fitting of the color layer, and the color noise is reduced.
In the embodiment of the present application, the color layer 40 is formed by a UV spray-painting process. For example, the color layer is formed by combining a plurality of single-color UV printing inks in proportion, printing the combined color layer to the first texture layer through UV spray painting, and curing the first texture layer. The color layer obtained by the UV spray painting process is rich and vivid in color, three-dimensional, high in pattern definition and low in color noise. Optionally, the color layer has one or more hollowed-out portions. The color layer is provided with the areas with the hollowed-out parts, the color change is different from the color change of other areas, and the hollowed-out parts in the color layer can improve the visual effect and the appearance expressive force of the shell assembly. Alternatively, the pattern and the size of the hollowed-out part can be set according to actual requirements. In one embodiment, the thickness of the hollow-out part accounts for 1/4-1/2 of the thickness of the color layer.
In the embodiment of the application, the adhesive force between the first texture layer and the color layer is 1-2 MPa. In one embodiment, the adhesion between the first texture layer and the color layer is 1.2 to 2 MPa. The adhesion test was performed according to the standards of ASTM D4541 and ASTM D7234. The adhesive force between the traditional texture layer and the color layer is generally lower than 1MPa, and particularly for the color layer formed by the UV spray painting process, the color layer is easy to separate and fall off from other adjacent film layers; but this application adhesion between first texture layer and the colour layer is high, and first texture layer can closely adhere with the colour layer of high thickness, is difficult for droing between the membranous layer structure, and the reliability is high.
The term "reliability" in the context of this application refers to the stability performance of each film structure of the housing assembly during the tests including the hundred-cell test, the hundred-cell test after boiling, the high temperature and high humidity test, the cold and hot shock test, the high temperature storage test, the low temperature storage test, the artificial sweat resistance test, the cosmetic resistance test, the alcohol wiping resistance test, and the ultraviolet aging resistance test.
In an embodiment of the present application, the first texture layer has a thickness of 5 to 15 μm. In one embodiment, the first texture has a thickness of 5 to 10 μm. In another embodiment, the first texture layer has a thickness of 8-15 μm. In a third embodiment, the first texture has a thickness of 10-15 μm. The thickness of the first texture layer is greater than the height of the protrusions or the depth of the grooves. In the embodiment of the present application, the thickness of the color layer is 10 to 70 μm. In one embodiment, the color layer has a thickness of 55 to 70 μm. In another embodiment, the color layer has a thickness of 60 to 70 μm. The color layer with large thickness can present richer, vivid and three-dimensional patterns or gradual change effects. Optionally, the material of the first texture layer is urethane acrylate.
In the embodiment of the present application, the gloss oil layer is made of a polyester material. For example, the gloss oil layer is made of polyurethane. The thickness of the gloss oil layer is 3-10 μm. In one embodiment, the thickness of the varnish layer is 5-10 μm. In another embodiment, the varnish layer has a thickness of 5 to 8 μm. The gloss oil layer may be, but is not limited to, a transparent layer having high light transmittance. The gloss oil layer can also increase the adhesive force of the first texture layer and the shell substrate besides the brightness of the film layer structure, and the reliability of the shell assembly is improved.
In the embodiments of the present application, the housingThe component further comprises a coating layer, wherein the coating layer is arranged between the shell substrate and the gloss oil layer or between the color layer and the bottom covering ink layer. Optionally, the material of the plating layer comprises In/Sn alloy and TiO2(titanium dioxide), NbO2(niobium dioxide), Nb2O3(niobium trioxide), Nb2O2(niobium dioxide), Nb2O5(niobium pentoxide), SiO2(silica), ZrO2(zirconium dioxide) or other non-conductive oxide. In one embodiment, the material of the coating layer comprises In/Sn alloy and TiO2、NbO2、Nb2O3、Nb2O2、Nb2O5、SiO2And ZrO2One or more of (a). The coating layer can be but is not limited to a single-layer structure or a multi-layer stacked structure. When the coating layer is of a multilayer superposed structure, the materials of each layer of film layer can be the same or different. The coating layer can have a certain light reflecting effect and a certain metal luster, for example, the coating layer can be but is not limited to an In/Sn alloy coating layer; the coating layer can also have a certain light transmittance, does not influence the surface projection or groove structure of the first texture layer, and can enable the shell assembly to be more colorful. The coating layer may be prepared by a vacuum plating process, such as a vacuum non-conductive plating process. Alternatively, the coating layer may be formed by, but not limited to, electron beam evaporation coating or magnetron sputtering coating techniques. Optionally, the thickness of the coating layer is 5-300 nm. In one embodiment, the thickness of the plating layer is 100-300 nm.
In the embodiment of the application, the shell assembly further comprises a second texture layer, and the second texture layer is arranged between the shell substrate and the gloss oil layer or between the color layer and the bottom ink layer. The second texture layer may be, but is not limited to, a conventional UV texture layer. Optionally, the second textured layer surface may include, but is not limited to, line stripes, CD stripes, wirelines, sun stripes, or woven stripes.
In the embodiment of the application, the casing assembly further comprises a hardening layer, and the hardening layer is arranged on the second surface of the casing substrate. The hardened layer may further enhance the high hardness and wear resistance of the housing assembly. Wherein the surface hardness of the hardened layer is 3H-6H. Optionally, the thickness of the hardened layer is 3-20 μm. In one embodiment, the thickness of the hardened layer is 10 to 20 μm.
In the embodiment of the present application, the housing assembly further includes an identification layer, which may be, but is not limited to, disposed between the housing substrate and the gloss oil layer, and the identification layer is stacked on the first surface of the housing substrate. The identification layer may be, but is not limited to, a layer structure containing words, characters or LOGO patterns.
In the embodiment of the application, still be equipped with the function hole on the casing subassembly, the function hole includes one or more in power button hole, volume button hole, sound amplification hole, camera hole and the hole that charges. The specific type, shape or size of the functional hole can be adjusted based on actual requirements, and the implementation method of the application is not particularly limited.
In the embodiment of the application, the shell assembly with different film combinations can obtain different appearance effects. As shown in fig. 5, an embodiment of the present application provides a housing assembly 200, which includes a housing substrate 10, where the housing substrate 10 includes a first surface 11 and a second surface 12 that are oppositely disposed, a gloss oil layer 20, a first texture layer 30, a color layer 40, and a bottom-covering ink layer 50 are sequentially disposed on the first surface 11, and a surface of one side of the first texture layer 30, which is close to the color layer 40, includes a plurality of protrusions 31 and/or grooves 32 arranged in an array; the color layer 40 is formed by a UV spray painting process; a hardened layer 60 is provided on the second surface.
As shown in fig. 6, an embodiment of the present application provides a housing assembly 300, which includes a housing substrate 10, where the housing substrate 10 includes a first surface 11 and a second surface 12 that are oppositely disposed, a gloss oil layer 20, a first texture layer 30, a color layer 40, a second texture layer 70, a film coating layer 80, and a bottom ink layer 50 are sequentially disposed on the first surface 11, and a surface of one side of the first texture layer 30, which is close to the color layer 40, includes a plurality of protrusions 31 and/or grooves 32 that are arranged in an array; the color layer 40 is formed by a UV spray painting process; a hardened layer 60 is provided on the second surface. The film coating layer 80 can be but not limited to have a light reflecting effect, and can be used as a reflecting layer to improve the appearance effect of the shell assembly.
Optionally, a second gloss oil layer may be disposed between the color layer 40 and the second texture layer 70, and the second gloss oil layer may be, but is not limited to be, the same as the gloss oil layer. In one embodiment, the second varnish layer is the same material as the varnish layer, but is of a different thickness.
Optionally, an optical adhesive layer may be further disposed between the optical oil layer 20 and the housing substrate 10, and the optical adhesive layer may be, but is not currently, an OCA optical adhesive layer. When the film layer structures in the shell assembly are not directly formed on the surface of the shell substrate, the fixed bonding can be performed through the optical adhesive layer. For example, the gloss oil layer is bonded to the first surface of the housing substrate using an OCA optical cement layer.
As shown in fig. 7, an embodiment of the present application provides a housing assembly 400, which includes a housing substrate 10, where the housing substrate 10 includes a first surface 11 and a second surface 12 that are oppositely disposed, a second texture layer 70, a film coating layer 90, a gloss oil layer 20, a first texture layer 30, a color layer 40, and a bottom ink layer 50 are sequentially disposed on the first surface 11, and a surface of one side of the first texture layer 30, which is close to the color layer 40, includes a plurality of protrusions 31 and/or grooves 32 arranged in an array; the color layer 40 is formed by a UV spray painting process; a hardened layer 60 is provided on the second surface. The coating layer 90 has a certain light transmittance, and does not affect the appearance of the surface protrusion or groove structure of the first texture layer.
In the shell assembly provided by the embodiment of the application, the color layer is formed by a UV (ultraviolet) spray painting process, the color and pattern definition in the color layer is high, the color noise is low, and the color types and the gradual change effect are richer; set up protruding and/or groove structure and the gloss oil layer that a plurality of arrays were arranged on first texture layer surface, can make to promote that adhesive force is stronger between each membranous layer structure including colour layer, first texture layer in the casing subassembly, have high reliability, can effectively avoid appearing the layering risk that drops, increase of service life. The housing assembly described herein may be used in a wide variety of housings for devices involving electronics and communications.
As shown in fig. 8, an embodiment of the present application provides a method for manufacturing a housing assembly, including the following steps:
s101, providing a shell substrate;
s102, forming a gloss oil layer and a first texture layer on the surface of one side of the shell substrate, forming a color layer on the first texture layer through a UV (ultraviolet) spray painting process, and then forming a bottom covering ink layer on the color layer, wherein the surface of one side, close to the color layer, of the first texture layer comprises a plurality of protrusions and/or grooves which are arranged in an array manner;
s103, forming the curved surface of the shell substrate by adopting a high-pressure forming process to obtain a semi-finished shell assembly;
and S104, performing strengthening treatment and CNC machining on the semi-finished product of the shell assembly to obtain the shell assembly.
In the process of S101, the housing substrate may be cut by a cutting machine. For example, the shell substrate is cut according to a preset size so as to meet the requirements of the shell substrates in shell assemblies with different sizes and reduce the waste of raw materials in the manufacturing process.
Optionally, the housing substrate 10 is a transparent plate with high transmittance. The material of the shell substrate comprises one or more of polycarbonate, polyethylene terephthalate, polymethyl methacrylate and glass. Optionally, the housing substrate may be, but not limited to, a PC board, a PET board, a PC and PMMA composite board, a PET and PMMA composite board, or glass. The PC and PMMA composite board is a composite board consisting of at least one PC layer and at least one PMMA layer. For example, the composite plate is a PC/PMMA double-layer structure. When the shell substrate is a PC and PMMA composite board, the first surface is a PC surface.
In the S102 process, the gloss oil layer is made of polyester. The manufacturing method of the gloss oil layer comprises the following steps: and selecting a 200-mesh 420-mesh silk-screen printing plate, carrying out silk-screen printing on the surface of one side of the shell substrate through a silk-screen printing process, and then curing to form a gloss oil layer after baking. Optionally, the baking temperature is 60-90 deg.C, and the baking time is 30-100 min.
Optionally, before the varnish layer is formed, an identification layer may be further formed on one side surface of the housing substrate. The identification layer may be, but is not limited to, a layer structure containing words, characters or LOGO patterns. For example, a marking layer with a thickness of 1 to 4 μm is formed on the case substrate by screen printing, and after printing, the marking layer is subjected to solid baking. Wherein the baking temperature is 60-80 deg.C, and the baking time is 45-80 min.
Optionally, a first texture layer is formed on the varnish layer through a UV transfer process using a master having a mirror image pattern of the protrusions and/or grooves on a surface thereof. Optionally, the lateral dimension of the protrusion is 0.1-200 μm, the height of the protrusion is 0.1-5 μm, the lateral dimension of the opening of the groove is 0.1-200 μm, and the depth of the groove is 0.1-5 μm. The master plate can be, but is not limited to, a stainless steel plate, a nickel plate, a galvanized plate, glass or a conventional polymer material plate. Through the master, a first texture layer with a plurality of protrusions and/or grooves arranged in an array can be formed through transfer. In one embodiment, a UV glue is used, and the material of the UV glue is urethane acrylate; transfer printing was performed using a UV transfer printer. The first texture layer has no other texture structures inside except the projections and/or the grooves on the surface. In the transfer process, curing is carried out by using an LED and/or a mercury lamp; wherein the LED curing energy is 800-2Then the curing energy of the mercury lamp is 550-2. The manufacturing method is beneficial to obtaining the first texture layer with appropriate softness and difficult cracking; it is difficult for appearing the bad problem of rainbow line after high pressure. The first texture layer has a surface energy greater than 36 dynes. By selecting masters with different patterns, based on actual needs, a first texture layer with different protrusions or grooves can be obtained. Optionally, in the first texture layer, the cross-sectional shapes of the protrusions and the grooves in a direction parallel to the first texture layer include one or more of a circle, a triangle, a quadrangle, and a polygon, respectively.
Optionally, the UV spray painting processThe method comprises the following steps: the computer drawing file is converted into a document which can be identified by a printer, and then a plurality of single-color UV ink combinations (for example, C, M, Y, K four-color ink) are sprayed and painted on the surface of the first texture layer, so that a UV ink layer with a pattern effect is sprayed and painted on the surface of the first texture layer, and a color layer is formed after the UV ink layer is cured. Wherein, LED lamp curing and mercury lamp curing are used; the curing energy of the LED is 800-2The curing energy of the mercury lamp is 500-1000MJ/cm2. The thickness of the color layer after curing is 10-70 μm. In the UV spray painting and printing process of the color layer, some areas are selected for hollowing out, so that the superposed effects of different areas are different, and a colorful gradual change effect or an appearance effect is obtained. The UV spray painting process may be implemented using, but not limited to, a UV spray painting apparatus or a digital spray painting apparatus.
Optionally, the bottom-covering ink layer is disposed on the outermost side of the first surface of the housing substrate. The bottom ink layer can play a role in protecting the shell assembly; meanwhile, when the bottom ink layer can be a non-light-transmitting layer, the bottom ink layer can be used as a background color layer and can be used for perfectly showing the appearance effect of each film layer of the shell assembly. Optionally, the bottom ink layer is black or white ink. The cover plate ink layer is obtained after the ink is sprayed to the surface of the substrate for one time or multiple times and dried. Optionally, the thickness of the capping ink layer is 10-30 μm.
Optionally, a coating layer and a second texture layer are further arranged between the color layer and the bottom covering ink layer, or the coating layer and the second texture layer are formed on the surface of one side of the shell substrate before the gloss oil layer is formed. Wherein the coating layer can be prepared by a vacuum plating process, such as a vacuum non-conductive plating (NCVM) process. Optionally, the material of the plating layer comprises In/Sn alloy and TiO2、NbO2、Nb2O3、Nb2O2、Nb2O5、SiO2、ZrO2Or one or more of other non-conductive oxides. The second texture layer is manufactured through a UV transfer printing process. The second texture layer may be, but is not limited to, a conventional UV texture layer. Optionally, the second textured layer surface may include, but is not limited to, linesStripes, CD stripes, drawn lines, sun lines or woven lines. The thickness of the second texture layer is 5-20 μm, and the LED curing energy is 800-2500MJ/cm when the second texture layer is transferred2Then the curing energy of the mercury lamp is 550-2. The second texture layer is made of polyurethane acrylate.
In the step S103, a high-pressure forming process is adopted to perform curved surface forming on each film structure and the housing substrate formed in the step S102, so as to obtain a housing substrate in a three-dimensional shape. Alternatively, the stereoscopic morphology may be, but is not limited to, a stereoscopic morphology that is a 3D curved surface. After the curved surface molding, the first surface of the shell substrate with the three-dimensional shape is the inner side surface. The shell substrate can be pressed into a shell substrate with a three-dimensional shape of a preset shape by adjusting the high-pressure forming process parameters. In one embodiment, the high pressure forming process comprises the following specific steps: the shell substrate prepared in the step S102 is placed on a mold to be heated and softened, and then the plate-shaped composite shell substrate is pressed into a preset structural shape through high-pressure gas pressure, so that the shell substrate in a three-dimensional shape is obtained. The process parameters are adjusted, so that the phenomenon of cracking or line flaws of a film layer formed on a shell substrate in curved surface forming can be prevented, and the yield is improved.
In the S104 process, the specific process of the reinforcement processing includes: and cleaning the semi-finished product of the shell assembly, and spraying hardening liquid on the outer surface of the semi-finished product of the shell assembly so as to solidify and form a hardened layer on the outer surface of the semi-finished product of the shell assembly. Optionally, the hardening liquid may be, but is not limited to, applied to the outer surface of the housing assembly blank by one or more spray applications. When the hardening liquid is sprayed for multiple times, the hardening liquid can be more uniformly coated on the outer surface of the semi-finished product of the shell assembly, and the thickness of the hardening layer is uniform; and the hardening liquid can form a firm hardened layer on the outer surface of the semi-finished product of the shell component. In the application, the hardened layer is firmly combined with the outer surface of the semi-finished product of the shell assembly, and the hardness of the hardened film is more than or equal to 3H.
Alternatively, a CNC (Computer numerical control) machine is an automated machine controlled by a program. The specific process of CNC machining comprises the following steps: and carrying out numerical control cutting on the strengthened semi-finished product of the shell assembly, and forming functional holes on the semi-finished product of the shell assembly, wherein the functional holes comprise one or more of a power supply key hole, a volume key hole, a sound expansion hole, a camera hole and a charging hole.
The method for manufacturing the housing assembly of the present application can be used for manufacturing the housing assembly described above. Some specific limitations in the manufacturing method of the housing assembly are consistent with the foregoing descriptions of the limitations of the housing assembly, and are not described again in this embodiment.
According to the manufacturing method of the shell assembly, the structure comprising the gloss oil layer, the first texture layer and the color layer which are sequentially stacked is formed on the shell substrate, the phenomenon that layers are easy to separate and fall off among all film layer structures can be greatly improved, the color layer is formed by the UV spray painting process, the color and pattern definition in the color layer is high, the color noise point is low, and the color type and the gradual change effect are richer; the prepared shell assembly has stronger adhesive force among all film layer structures, extremely high reliability and long service life. The preparation method is simple to operate, can be used for large-scale industrial production, and has high yield and low cost.
As shown in fig. 9, an embodiment of the present application further provides a method for manufacturing a housing assembly, including the following steps:
s201, providing a bearing plate;
s202, forming a gloss oil layer and a first texture layer on the surface of one side of the bearing plate, forming a color layer on the first texture layer through a UV (ultraviolet) spray painting process, and then forming a bottom covering ink layer on the color layer, wherein the surface of one side, close to the color layer, of the first texture layer comprises a plurality of protrusions and/or grooves which are arranged in an array manner;
s203, providing a shell substrate with a curved surface, stripping the bearing plate, and bonding the gloss oil layer on one side surface of the shell substrate to obtain a semi-finished shell assembly;
and S204, performing strengthening treatment and CNC machining on the semi-finished product of the shell assembly to obtain the shell assembly.
The bearing plate can be but not limited to comprise a release layer, so that damage to the film layer when the bearing plate is stripped can be greatly reduced, and quick stripping is facilitated.
In the S203 process, the gloss oil layer may be bonded to one side surface of the housing substrate by using an optical adhesive, for example, OCA optical adhesive. The housing substrate is a housing substrate which has been curved. The bonding process of the gloss oil layer and the housing substrate can be but is not limited to vacuum bonding through a mold, and air bubbles possibly generated in the bonding process are removed.
In the embodiment of the present application, the manufacturing method of the housing assembly is consistent with other limitations in the manufacturing method described above, and details are not repeated in this embodiment.
As shown in fig. 10, an embodiment of the present application provides an electronic device 500, including:
a housing assembly 501 and a display assembly 502, wherein the display assembly 502 is connected to the housing assembly 501, and the housing assembly 501 is the housing assembly 100, 200, 300 or 400.
Optionally, the electronic device 500 further comprises other electronic components including one or more of a central processor, a camera, and a sensor assembly.
Optionally, the specific definition of the housing assembly 501 is consistent with the description of the housing assembly 100-400, and is also consistent with the description of the definition of the housing assembly in the manufacturing method of the housing assembly, which is not repeated in this embodiment.
Optionally, the electronic device 500 provided by the present application includes, but is not limited to, a mobile terminal such as a mobile phone, a tablet Computer, a notebook Computer, a palmtop Computer, a Personal Computer (PC), a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and a fixed terminal such as a digital TV, a desktop Computer, and the like.
The overall performance of the housing assembly according to the embodiments of the present application will be described below by way of specific examples, wherein comparative examples are designed based on the embodiments of the present application. It will be understood by those skilled in the art that the following examples are illustrative of the present application only and should not be taken as limiting the scope of the present application. 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 manufacturers, and are all conventional products commercially available.
Example 1
A method of making a housing assembly comprising the steps of:
taking a PMMA/PC shell substrate, and cutting the PMMA/PC shell substrate by using a cutting machine;
and then printing a polyurethane gloss oil layer on the PC surface of the PMMA/PC shell substrate, and curing and baking the printed gloss oil layer. A UV transfer machine is used for transferring and printing on the shell substrate gloss oil layer to form a first texture layer, the surface of the first texture layer is provided with a plurality of grooves which are arranged in an array mode, the transverse size of each groove is 10 micrometers, the depth of each groove is 5 micrometers, and the distance of each groove is 10 micrometers; then, carrying out UV (ultraviolet) spray painting on the surface of the first texture layer with the groove to print a color layer so as to form a blue-red gradient pattern; continuing UV transfer printing the UV texture layer of the line texture on the color layer, and then forming ZrO by using a vacuum non-conductive electroplating vacuum plating process2/TiO2/SiO2And then spraying cover bottom ink on the coating layer, and drying to form a cover bottom ink layer.
Performing 3D curved surface forming on the obtained shell substrate by adopting a high-pressure forming process to obtain a semi-finished shell assembly;
spraying hardening liquid on the semi-finished product of the shell assembly, and curing the outer surface of the semi-finished product of the shell assembly to form a hardening film; and then CNC machining is carried out to obtain a shell component sample.
Example 2
A method of making a housing assembly comprising the steps of:
taking a PMMA/PC shell substrate, and cutting the PMMA/PC shell substrate by using a cutting machine;
and then printing a polyurethane gloss oil layer on the PC surface of the PMMA/PC shell substrate, and curing and baking the printed gloss oil layer. Using UV transfer machine on the shell baseThe first texture layer is formed on the plate gloss oil layer through transfer printing, the surface of the first texture layer is provided with a plurality of protrusions arranged in an array mode, the transverse size of each protrusion is 10 micrometers, the depth of each protrusion is 5 micrometers, and the distance between the protrusions is 10 micrometers; then, carrying out UV (ultraviolet) spray painting on the surface of the first texture layer with the groove to print a color layer so as to form a blue-red gradient pattern; continuing UV transfer printing the UV texture layer of the line texture on the color layer, and then forming ZrO by using a vacuum non-conductive electroplating vacuum plating process2/TiO2/SiO2And then spraying cover bottom ink on the coating layer, and drying to form a cover bottom ink layer.
Performing 3D curved surface forming on the obtained shell substrate by adopting a high-pressure forming process to obtain a semi-finished shell assembly;
spraying hardening liquid on the semi-finished product of the shell assembly, and curing the outer surface of the semi-finished product of the shell assembly to form a hardening film; and then CNC machining is carried out to obtain a shell component sample.
Comparative example 1
Compared with the manufacturing method of the embodiment 1, the differences are that: the first texture layer was replaced with a UV texture layer of conventional line texture. Other film structures and fabrication processes are completely the same as those of embodiment 1.
Effects of the embodiment
Adhesion test, reliability test and appearance test were performed on the housing assembly samples prepared in the above example 1 and comparative example 1, respectively, in 20 pieces. Wherein the adhesion test is to test the first texture layer and the color layer according to the standards of ASTM D4541 and ASTM D7234; the reliability test comprises the following steps: after being boiled in water for 4 hours at 100 ℃, the test is carried out according to the standard of the grid test of GB/T9286-1998 color paint and varnish paint film; the appearance was checked through a magnifying glass. The results of the above tests are shown in table 1 below.
Table 1 table of performance parameter data for samples of the housing assemblies of comparative example 1 and example 1
From the test results of each experimental group, compared with comparative example 1, in the housing assembly manufactured in embodiment 1 of the present application, the gloss oil layer, the texture layer having the grooves arranged in an array on the surface, and the color layer formed by UV inkjet printing are adopted, and 20 samples all reach the highest standard of the industrial poaching one-hundred-grid test, so that the reliability is high, the adhesion between the first texture layer and the color layer is high, and the appearance of the housing assembly is more excellent.
While the foregoing is directed to embodiments of the present application, it will be appreciated by those skilled in the art that various changes and modifications may be made without departing from the principles of the application, and it is intended that such changes and modifications be covered by the scope of the application.
Claims (20)
1. A shell assembly is characterized by comprising a shell substrate, wherein the shell substrate comprises a first surface and a second surface which are oppositely arranged, a gloss oil layer, a first texture layer, a color layer and a bottom covering ink layer are sequentially arranged on the first surface, and the surface of one side, close to the color layer, of the first texture layer comprises a plurality of protrusions and/or grooves which are arranged in an array manner; the color layer is formed by a UV spray painting process.
2. The housing assembly of claim 1 wherein the projections have a lateral dimension of 0.1-200 μm, the projections have a height of 0.1-5 μm, the groove openings have a lateral dimension of 0.1-200 μm, and the grooves have a depth of 0.1-5 μm.
3. The housing assembly of claim 1, wherein the cross-sectional shapes of the protrusions and grooves in a direction parallel to the first textured layer each comprise one or more of a circle, a triangle, a quadrilateral, and a polygon.
4. The housing assembly of any of claims 1-3, wherein a pitch between any adjacent projections, between any adjacent recesses, or between any adjacent projections and recesses is 0.05-400 μm.
5. The housing assembly of claim 2 wherein the spacing between any adjacent projections is from 0.5 to 2 times the lateral dimension of the projections and the spacing between any adjacent recesses is from 0.5 to 2 times the lateral dimension of the recesses.
6. The housing assembly of claim 1, wherein the adhesion between the first textured layer and the color layer is 1-2 MPa.
7. The housing assembly of claim 1, wherein the color layer has one or more hollowed-out portions.
8. The housing assembly of claim 1 further comprising a coating disposed between said housing substrate and said varnish layer or between said color layer and said primer ink layer.
9. The housing assembly of claim 8 wherein the coating material comprises an In/Sn alloy, TiO2、NbO2、Nb2O3、Nb2O2、Nb2O5、SiO2、ZrO2Or one or more of other non-conductive oxides.
10. The housing assembly of claim 1 or 8, further comprising a second textured layer disposed between the housing substrate and the varnish layer or between the color layer and the under-cover ink layer.
11. The housing assembly of any of claims 1-10, further comprising a hardened layer disposed on the second surface of the housing substrate.
12. The housing assembly of claim 1, wherein the first textured layer has a thickness of 5-15 μ ι η.
13. The housing assembly of claim 1, wherein the color layer has a thickness of 10-70 μ ι η.
14. The housing assembly of claim 1, wherein the varnish layer is made of polyester material; the thickness of the gloss oil layer is 3-10 μm.
15. The housing assembly of claim 1, wherein the housing substrate is a transparent plate, and the material of the housing substrate comprises one or more of polycarbonate, polyethylene terephthalate, polymethyl methacrylate, and glass.
16. A method of making a housing assembly, comprising the steps of:
providing a shell substrate;
forming a gloss oil layer and a first texture layer on the surface of one side of the shell substrate, forming a color layer on the first texture layer through a UV (ultraviolet) spray painting process, and then forming a bottom-covering ink layer on the color layer, wherein the surface of one side, close to the color layer, of the first texture layer comprises a plurality of bulges and/or grooves which are arranged in an array manner;
forming the curved surface of the shell substrate by adopting a high-pressure forming process to obtain a semi-finished shell assembly;
and performing strengthening treatment and CNC machining on the semi-finished product of the shell assembly to obtain the shell assembly.
17. A method of making a housing assembly, comprising the steps of:
providing a bearing plate;
forming a gloss oil layer and a first texture layer on the surface of one side of the bearing plate, forming a color layer on the first texture layer through a UV (ultraviolet) spray painting process, and then forming a bottom covering ink layer on the color layer, wherein the surface of one side, close to the color layer, of the first texture layer comprises a plurality of bulges and/or grooves which are arranged in an array manner;
providing a shell substrate with a curved surface, stripping the bearing plate, and bonding the gloss oil layer on one side surface of the shell substrate to obtain a semi-finished shell assembly;
and performing strengthening treatment and CNC machining on the semi-finished product of the shell assembly to obtain the shell assembly.
18. The production method according to claim 16 or 17, wherein a first texture layer is formed on the varnish layer by a UV transfer process using a master having a mirror image pattern of the protrusions and/or grooves on a surface thereof; the lateral dimension of the protrusion is 0.1-200 μm, the height of the protrusion is 0.1-5 μm, the lateral dimension of the opening of the groove is 0.1-200 μm, and the depth of the groove is 0.1-5 μm.
19. An electronic device, comprising:
a housing component according to any one of claims 1 to 15 or made by the method of manufacture of any one of claims 16 to 18;
a display assembly coupled to the housing assembly.
20. The electronic device of claim 19, further comprising other electronic components including one or more of a central processor, a camera, and a sensor assembly.
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| CN114828465A (en) * | 2021-01-22 | 2022-07-29 | Oppo广东移动通信有限公司 | Shell assembly, preparation method thereof and electronic equipment |
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