CN110290658B

CN110290658B - Shell assembly, preparation method thereof and electronic equipment

Info

Publication number: CN110290658B
Application number: CN201910570144.3A
Authority: CN
Inventors: 侯体波; 张涛; 毕四鹏
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2021-03-09
Anticipated expiration: 2039-06-27
Also published as: CN110290658A

Abstract

The application discloses a shell assembly, a preparation method of the shell assembly and electronic equipment. Specifically, the application proposes a method of preparing a housing assembly, comprising: providing a shell base body, wherein the shell base body is provided with a bottom surface and a side wall connected with the bottom surface, and the bending angle between the side wall and the bottom surface is more than 70 degrees; and forming an appearance membrane and attaching the appearance membrane to one side of the housing base, the forming of the appearance membrane further comprising: providing a soft substrate; transferring a first UV glue on one side of the soft substrate so as to form a first UV transfer printing layer; and spraying and printing mixed ink on one side of the first UV transfer printing layer, which is far away from the soft substrate, so as to form a color layer. Therefore, the shell assembly prepared by the method has a large radian, the appearance membrane and the shell base body are tightly attached, the shell assembly is rich in color gradient form, the appearance effect is good, and the product expressive force is good.

Description

Shell assembly, preparation method thereof and electronic equipment

Technical Field

The application relates to the field of electronic equipment, in particular to a shell assembly, a preparation method of the shell assembly and the electronic equipment.

Background

With the continuous development of the preparation technology in the field of electronic equipment, the shell material for the electronic equipment is also abundant. The glass material has the characteristics of good light transmission, corrosion resistance, heat resistance, easiness in processing and the like, and the membrane decoration has the characteristics of easiness in processing, low price, diversified appearance and the like, so that electronic equipment shells manufactured by adopting a glass membrane attaching mode are widely applied, for example, the back covers of batteries of many mobile phones adopt the glass membrane attaching mode to realize the exquisite appearance of the back covers. At present, with the progress of process technology, the glass can realize large-angle bending and even reverse buckling, and when the glass material is applied to the shell of electronic equipment, the appearance effect and the product expressive force of the electronic equipment can be improved.

However, the present housing assembly, the manufacturing method thereof, and the electronic device still need to be improved.

Disclosure of Invention

The present application is based on the discovery and recognition by the inventors of the following facts and problems:

the inventors have found that when a case of an electronic device is manufactured using a glass substrate having a large bending angle, the glass substrate and an exterior film are difficult to be bonded to each other. At present, the bending angle of a glass substrate is usually small, for example, a common 3D glass cover plate has a limited bending degree, and in the process of laminating the glass substrate, the film substrate and a laminated material (namely, various appearance effects of the film, the laminated material with colors, textures, metallic luster and the like formed on the film substrate) on the film substrate cannot be obviously stretched, so that the polyethylene terephthalate film (PET film) is adopted to be well laminated, and a good appearance can be realized. However, when the PET film is attached to a glass substrate with a large bending angle (for example, a glass rear cover with four sides having a bending radian exceeding 30 °), the PET film has high rigidity and poor ductility, so that the PET film is difficult to attach to a glass substrate with a large bending angle, the attachment adhesion is poor, bubbles are easy to occur, and a laminated material is easy to break, which affects the appearance effect of the housing, thereby limiting the application of the glass material with a large bending angle and the like in the housing of an electronic device.

The inventor also finds that the soft substrate is used as the film base material, which is beneficial to the bonding of the film and the glass material bent at a large angle, but when the soft substrate is used as the film base material and the color layer is formed on the soft substrate, the problems of poor color effect, poor bonding force between the color layer and the soft substrate, easy cracking of the color layer after the glass base plate bent at a large angle is bonded and the like commonly exist in the existing method for forming the color layer on the film. For example, the current methods for forming color layers on PET film sheets generally include the following methods: (1) ribbon printing method: the method transfers the single color on the color ribbon to the surface of the film substrate in a thermal transfer printing mode, and realizes the gradual change of the colorful color through the combination of the colorful color ribbons. Although the colors printed by the method are better in fusion and natural in gradient effect, the bonding force between the ribbon layer formed by thermal transfer printing and the film substrate is poor, for example, the ribbon layer is easy to melt after being heated, so that the colors are layered, and the appearance is abnormal. (2) Dip dyeing or spray coating: when the method is used for manufacturing the gradient color diaphragm, the color range is narrow, only single color or double color can be printed, the arrangement of the double color can be only up and down, left and right, and oblique lines, and the color distribution of the three color or other arbitrary shapes is almost difficult to realize. (3) The offset printing method is characterized in that a single color is printed on the offset plate every time, various colors are realized through CMYK four-color offset printing combination, and the manufactured color layer has the characteristics of rich color types, high production efficiency and the like.

Therefore, if a new method for manufacturing a housing assembly can be provided, the appearance membrane and the housing base with large angle bending can be tightly attached, and the housing assembly can have good color effect, and the problems can be solved to a great extent.

The present application is directed to solving, at least to some extent, one of the technical problems in the related art.

In one aspect of the present application, a method of making a housing assembly is presented. According to an embodiment of the application, the method comprises: providing a shell base body, wherein the shell base plate is provided with a bottom surface and a side wall connected with the bottom surface, and the bending angle between the side wall and the bottom surface is more than 70 degrees; and forming an appearance film and attaching the appearance film to one side of the housing base, wherein the forming of the appearance film further comprises: providing a soft substrate; transferring a first UV glue on one side of the soft substrate so as to form a first UV transfer printing layer; and spraying and printing mixed ink on one side of the first UV transfer printing layer, which is far away from the soft substrate, so as to form a color layer. Therefore, the shell assembly prepared by the method has rich color gradient forms, unlimited color distribution, no noise in color and difficult layering of color layers; and the shell assembly has a large radian, the appearance membrane and the shell base body are tightly attached, the color layer is not easy to crack, the appearance effect is good, and the product expressive force is strong.

In another aspect of the present application, a housing assembly is presented. According to an embodiment of the present application, the housing assembly is prepared by the method for preparing the housing assembly, and thus the housing assembly has all the features and advantages of the housing assembly prepared by the method, which will not be described herein again. Generally speaking, this casing subassembly has great radian, and the laminating is inseparable between outward appearance diaphragm and the casing base member, and this casing subassembly colour gradual change form is abundant, and the outward appearance is respond well, and the product expressive force is strong.

In yet another aspect of the present application, a housing assembly is presented. According to an embodiment of the application, the housing assembly comprises: the shell body is provided with a bottom surface and a side wall connected with the bottom surface, and the bending angle between the side wall and the bottom surface is larger than 70 degrees; and an appearance membrane disposed on one side of the housing base, the appearance membrane further comprising: a soft substrate; the first UV transfer printing layer is arranged on one side, far away from the shell base body, of the soft substrate; and the color layer is arranged on one side, away from the soft substrate, of the first UV transfer printing layer, and the color layer is formed by spray painting and printing. From this, this casing subassembly has great radian, and the laminating is inseparable between outward appearance diaphragm and the casing base member, and this casing subassembly colour gradual change form is abundant, and the outward appearance is respond well, and the product expressive force preferred.

In yet another aspect of the present application, an electronic device is presented. According to an embodiment of the present application, the electronic device includes: the shell assembly is arranged in front of the electronic equipment, the shell assembly defines a containing space, and an appearance membrane of the shell assembly is arranged towards the inside of the electronic equipment; the main board and the memory are positioned in the accommodating space; and the screen is arranged at the top of the shell component and is connected with the main board. Therefore, the electronic device has all the features and advantages of the housing assembly prepared by the method described above, and the description thereof is omitted. Generally, the electronic equipment has good appearance effect and strong product expressive force.

Drawings

FIG. 1 shows a flow diagram of a method of preparing a housing assembly according to one embodiment of the present application;

FIG. 2 shows a flow diagram of a method for making an appearance film in accordance with one embodiment of the present application;

FIG. 3 shows a flow diagram of a method for making an appearance film in accordance with another embodiment of the present application;

FIG. 4 shows a schematic structural diagram of a housing base according to an embodiment of the present application;

FIG. 5 shows a flow chart of a method of preparing a housing base according to yet another embodiment of the present application;

FIG. 6 shows a flow chart of a method of making an appearance film according to yet another embodiment of the present application;

FIG. 7 illustrates a schematic structural view of a housing assembly according to one embodiment of the present application;

FIG. 8 illustrates a schematic partial cross-sectional view of a housing assembly according to an embodiment of the present application;

FIG. 9 illustrates a schematic partial cross-sectional view of a housing assembly according to another embodiment of the present application;

FIG. 10 illustrates a schematic view of a housing assembly in partial cross-section according to yet another embodiment of the present application; and

FIG. 11 shows a schematic structural diagram of an electronic device according to an embodiment of the present application.

Description of reference numerals:

100: a housing base; 110: a bottom surface; 120: a side wall; 200: an appearance membrane; 210: a soft substrate; 220: a first UV transfer layer; 230: a color layer; 240: a second UV transfer layer; 250: electroplating layer; 260: covering the bottom layer; 300: gluing; 1000: a housing assembly; 1100: an electronic device.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

In one aspect of the present application, a method of making a housing assembly is presented.

According to an embodiment of the application, referring to fig. 1, the method comprises:

s100: providing a housing base

In this step, a housing base is provided. According to an embodiment of the present application, a specific type of the housing base is not particularly limited, and may be, for example, glass or the like. Specifically, the bottom surface 110 may be a curved surface or a flat surface. Specifically, referring to fig. 4 and fig. 5 (a) (fig. 5 (a) is a cross-sectional view along AA' in fig. 4), the housing base 100 has a bottom surface 110, and a side wall 120 connected to the bottom surface 110, specifically, the housing assembly 100 may have 4 side walls 120 surrounding the bottom surface 110 and connected to each other, and a bending angle between the side wall 120 and the bottom surface 110 is greater than 70 degrees (refer to the bending angle a shown in fig. 1), for example, the bending angle a between the side wall 120 and the bottom surface 110 may be 80 degrees, 90 degrees, 100 degrees, 120 degrees, 130 degrees, etc., that is, the side wall 120 of the housing base 100 may be perpendicular to the bottom surface 110 (i.e., the bending angle a is 90 degrees), and may be bent toward the inside of the housing base 100 (i.e., the bending angle a is greater than 90 degrees). Moreover, the four side walls 120 of the housing base 100 may have a larger bending angle, so that the housing base 100 has a larger radian, and the housing assembly manufactured by using the housing base 100 may have a rich appearance and a strong product expressive force.

It should be particularly noted that the term "bending angle" in this application refers to an angle between the side wall 120 and the bottom surface 110 (an angle a shown in fig. 5 (a)), specifically, the bottom surface 110 may be a curved surface or a flat surface, and specifically, the bending angle is an angle between the side wall and the flat surface of the bottom surface. When the outer surface of the sidewall 120 (the surface on the side away from the appearance membrane 200) is a plane, the bending angle is the angle between the plane of the outer surface of the sidewall 120 and the bottom surface 110. When the outer surface of the sidewall 120 is a curved surface, the bending angle between the sidewall 120 and the bottom surface 110 is the maximum value of the included angle between the tangent line of any point on the curved surface of the sidewall and the plane where the bottom surface 110 is located. When the bottom surface 110 is curved, the angle between the sidewall and the bottom surface may be the angle between the tangent planes of the sidewall and the bottom surface. As described above, the housing base 100 may have 4 side walls 120, and the bending angles between the 4 side walls 120 and the bottom surface 110 may or may not be all equal. For example, in the 4 side walls, the bending angles between two oppositely disposed side walls and the bottom surface may be equal, and the bending angles between two adjacent side walls and the bottom surface may be unequal.

S200: forming an appearance membrane and attaching the appearance membrane to one side of the shell substrate

In this step, an appearance film is formed and attached to one side of the case base described above. According to an embodiment of the present application, referring to (b) of fig. 5, the exterior film 200 is attached to one side of the case base 100. According to the embodiment of the present application, the housing base 100 and the appearance membrane 200 may be bonded together by a bonding adhesive (not shown). Specifically, a bonding adhesive may be applied to one side of the appearance film, then the appearance laminated materials may be sequentially formed on the other side of the appearance film, and after the appearance film 200 is manufactured, the appearance film 200 may be bonded to one side of the housing base 100 by using the bonding adhesive.

According to an embodiment of the present application, referring to fig. 2, forming the appearance membrane further includes:

s210: providing a soft substrate

In this step, a soft substrate is provided. According to an embodiment of the present application, referring to (a) in fig. 6, the specific type of the soft substrate 210 is not particularly limited as long as it is good in flexibility. Specifically, the material forming the soft substrate 210 may include at least one of Thermoplastic Polyurethane (TPU), polyvinyl chloride (PVC), and a thermoplastic elastomer, and the thermoplastic elastomer may be a linear triblock copolymer (SEBS) having polystyrene as a terminal block and an ethylene-butene copolymer obtained by hydrogenating polybutadiene as a middle elastic block, or may be a linear triblock copolymer (SEPS) having polystyrene as a terminal block and an ethylene-isoprene copolymer obtained by hydrogenating polyisoprene as a middle elastic block. Specifically, the elongation percentage of the soft substrate 210 may be 150% to 300%, for example, 180%, 200%, 230%, 250%, 280%, or the like. When the elongation of the soft substrate 210 is within the above range, the soft substrate has good flexibility, is suitable for being attached to the housing base 100 with a large bending angle, is tightly attached, is not easy to generate bubbles, and improves the appearance effect of the prepared housing assembly. Specifically, the thickness of the soft substrate 210 may be 0.025 to 0.15mm, for example, 0.04mm, 0.05mm, 0.07mm, 0.085mm, 0.09mm, 0.1mm, 0.12mm, 0.14mm, or the like. When the thickness of the soft substrate 210 is within the above range, the soft substrate can be suitably attached to the case base 100 having a large angle bend.

S220: transferring a first UV glue on one side of the soft substrate to form a first UV transfer printing layer

In this step, the first UV paste is transferred to one side of the soft substrate described in the previous step to form a first UV transfer layer. According to an embodiment of the present application, referring to (b) of fig. 6, a first UV paste may be transferred on one side of the soft substrate 210 to form a first UV transfer layer 220. It should be noted that, in the method according to the embodiment of the present application, the substrate used in preparing the appearance film is the soft substrate described above, which is favorable for bonding with the large-angle curved housing base, but as described above, when the soft substrate is used as the film base material and the color layer is directly formed on the soft substrate, there are problems that the bonding force between the color layer and the soft substrate is poor, and the color layer is easily cracked after bonding with the large-angle curved glass substrate. Therefore, according to the method of the embodiment of the application, before the color layer is formed on the soft substrate, the first UV transfer printing layer is formed on the surface of the soft substrate in advance, the first UV transfer printing layer can improve the bonding force between the color layer formed in the later step and the soft substrate, and when the appearance membrane is attached to the shell base body subsequently, the color layer is not easy to crack, so that the appearance effect and the service performance of the prepared shell assembly are further improved.

According to an embodiment of the present application, the surface energy of the first UV transfer layer may be greater than 36 dynes (dyn). For example, it may be 40 dynes, 50 dynes, 60 dynes, etc. From this, the surface energy on this first UV rendition layer is great, when printing through the air brushing in the follow-up step and forming the colour layer, is favorable to the surface self-leveling on this first UV rendition layer of colour printing ink, improves the surface smoothness and the homogeneity on the colour layer that forms, improves the colour effect on colour layer.

Specifically, the shore hardness of the first UV transfer layer may be D30 to D80, for example, D35, D40, D45, D50, D54, D60, D65, D70, D74, or the like. From this, when the shore hardness on this first UV rendition layer was in above-mentioned scope, the ductility of first UV rendition layer 220 was better, and the cohesion between this first UV rendition layer and the soft substrate is also stronger, when laminating this outward appearance diaphragm on the crooked casing base member of big-angle, the laminating is inseparable, and this first UV rendition layer and soft substrate are difficult for the fracture, have improved the outward appearance effect of the casing subassembly that prepares. Specifically, when the shore hardness of the first UV transfer layer is too low (for example, less than D30), the elongation at break is high, which is beneficial to stretching the appearance membrane and attaching the appearance membrane to the shell substrate bent at a large angle, but when the shore hardness of the first UV transfer layer is too low, the bonding force between the first UV transfer layer and the soft substrate is poor, and when the appearance membrane is attached to the shell substrate bent at a large angle in the later stage, the first UV transfer layer and the color layer formed in the later step are easy to crack, which affects the appearance effect of the shell assembly; when the shore hardness of the first UV transfer layer is too high (for example, greater than D80), although the bonding force between the first UV transfer layer and the flexible substrate is strong, the elongation at break of the first UV transfer layer is low, which is not favorable for stretching the flexible substrate and attaching the flexible substrate to the housing base body with large-angle bending. In conclusion, when the shore hardness of the first UV transfer layer is within the above range, the first UV transfer layer is not only favorable for the attachment of the soft substrate and the shell base body bent at a large angle, but also has good performance of the attached first UV transfer layer and the soft substrate, and is not easy to crack, thereby further improving the appearance effect of the prepared shell assembly.

Specifically, the elongation at break of the first UV transfer layer may be 45% to 85%, for example, 50%, 60%, 65%, 70%, 75%, 80%, or the like. Therefore, when the fracture elongation of the first UV transfer printing layer is in the range, the stretching of the soft substrate and the fitting of the large-angle shell base body are facilitated, the binding force of the first UV transfer printing layer and the soft substrate can be improved, the shell assembly is not prone to cracking after later-stage fitting, and the appearance effect of the prepared shell assembly is further improved.

Specifically, the tensile breaking stress of the first UV transfer layer may be 6 to 20Mpa, for example, 8Mpa, 10Mpa, 12Mpa, 15Mpa, 17Mpa, 19Mpa, or the like. From this, the tensile fracture stress on first UV rendition layer when above-mentioned scope, existing tensile and the laminating with wide-angle casing base member that does benefit to soft substrate can improve the cohesion of first UV rendition layer and soft substrate again, and difficult fracture has further improved the outward appearance effect of the casing subassembly of preparing after the later stage laminating.

According to the embodiment of the present application, the kind and the like of the first UV paste may be selected so that the first UV transfer layer formed of the first UV paste has the above-described performance and effect. Specifically, the material forming the first UV paste may include urethane acrylate. Specifically, the viscosity of the first UV paste may be 600 to 800cps, for example, 650cps, 700cps, 750cps, or the like. Therefore, when the viscosity of the first UV glue is in the range, the prepared first UV transfer printing layer has good service performance.

According to an embodiment of the present application, the first UV transfer layer may be formed by transferring the first UV paste to a flexible substrate and performing UV curing, and the energy of the UV curing may be 800 to 1500mj/cm²For example, it may be 900mj/cm²And may be 1000mj/cm²And can be 1300mj/cm²And can be 1400mj/cm²And the like. Thereby, the performance of the prepared first UV transfer layer may be further improved. Specifically, the thickness of the first UV transfer layer may be 4 to 10 μm, for example, 5 μm, 6 μm, 8 μm, 9 μm, or the like. When the thickness of the first UV transfer layer is in the above range, the subsequent step of forming can be preferably promotedThe color layer and the soft substrate are combined, and when the appearance membrane is bonded with the shell substrate bent at a large angle, the first UV transfer printing layer and the color layer formed in the later step are not easy to crack, so that the service performance of the prepared shell assembly is further improved.

S230: spraying and printing mixed ink on one side of the first UV transfer printing layer far away from the soft substrate to form a color layer

In the step, the mixed ink is sprayed and printed on one side, away from the soft substrate, of the first UV transfer printing layer formed in the previous step, so that a color layer is formed. According to the embodiment of the application, before the mixed ink is printed by spray painting, a plurality of single-color inks can be mixed in advance in proportion to form the mixed ink with a preset color, then the mixed ink is printed on one side, away from the soft substrate, of the first UV transfer printing layer, and after the mixed ink is printed, the mixed ink can be solidified after the mixed ink is automatically leveled, so that a color layer is formed. Therefore, the color layer formed by the method has rich color gradient forms, unlimited color distribution, no color noise, difficult layering of the color layer and better pattern effect. Specifically, in the method, the printed mixed ink can be kept still for 0.5-2min at the temperature of 18-25 ℃, so that the printed mixed ink can automatically level under the action of surface tension. And, as mentioned before, the surface energy on first UV rendition layer is great, is favorable to this mixed printing ink to carry out the self-leveling, consequently, waits to mix the printing ink to solidify again after the self-leveling, and the colour layer surface that forms is more level and smooth, has avoided when printing the solidification simultaneously, and the surface that causes is uneven, and the pattern effect is relatively poor problem. In addition, as mentioned above, in the method, the first UV transfer printing layer is formed on the surface of the soft substrate in advance, and then the color layer is formed on the surface of the first UV transfer printing layer, the bonding force between the color layer and the soft substrate is strong, and when the soft substrate is bonded with the shell base body bent at a large angle, the color layer is not easy to crack, and the appearance effect is good. It should be noted that the term "self-leveling" refers to a process in which the mixed ink flows spontaneously in the absence of an applied force, relying solely on surface tension on the substrate (e.g., the first UV transfer layer).

Specifically, when performing inkjet printing, a plurality of monochromatic inks, such as CMYK four-color inks, may be placed in advance in the inkjet printer: cyan (Cyan, C), Magenta (M), Yellow (Y), and Black (K) inks. Before printing, the CMYK four-color inks can be controlled by a computer program to be mixed according to a certain proportion so as to obtain mixed ink with a preset color, for example, 0.1 muL of cyan ink, 0.3 muL of magenta ink, yellow 0 and black 0 can be controlled to be mixed, and then the mixed ink is printed on the surface of the first UV transfer printing layer; after the preset color of the preset position is printed, the previous steps can be repeated when the next position is printed, and the computer program can control the mixing of the multiple single-color inks according to a certain proportion again to form the mixed ink of the preset color, and then the printing is carried out. Therefore, patterns with rich colors can be formed simply and conveniently, and the appearance effect is good.

Specifically, curing the mixed ink includes: the mixed ink is irradiated and cured by a light emitting diode and a mercury lamp, and the energy for irradiation and curing can be 900-²For example, it may be 1000mj/cm²And can be 1300mj/cm²And can be 1600mj/cm²And may be 1900mj/cm²And the like. Thereby, the performance of the prepared color layer can be further improved.

According to an embodiment of the present application, referring to (c) of fig. 6, a color layer 230 is formed on a side of the first UV transfer layer 220 away from the soft substrate 210. Specifically, the thickness of the color layer 230 may be 10 to 40 μm, for example, 11 μm, 15 μm, 21 μm, 25 μm, 31 μm, 35 μm, or the like. Thus, when the thickness of the color layer 230 is in the above range, the performance of the color layer 230 is better. When the thickness of the color layer 230 is too small (for example, less than 10 μm), the self-leveling of the printed mixed ink is difficult, the thickness of the formed color layer is not uniform, and the problems of needle point colorlessness and the like are easy to occur; when the thickness of the color layer 230 is too large (e.g., greater than 40 μm), the curing energy penetration is difficult when the mixed ink is subsequently cured, and incomplete curing is easily caused, resulting in cracking of the formed color layer and poor appearance.

According to an embodiment of the present application, referring to fig. 3, after the forming the color layer, the method may further include:

s240: transferring a second UV glue on one side of the color layer far away from the first UV transfer printing layer to form a second UV transfer printing layer

According to an embodiment of the present application, the second UV paste may be transferred to a side of the color layer formed in the previous step, which is away from the first UV transfer layer, so as to form the second UV transfer layer. This second UV rendition layer can have abundant UV rendition texture, has further improved the outward appearance effect of the casing subassembly of preparing. Specifically, the second UV transfer layer may have the same properties as the first UV transfer layer described above, and thus, the description thereof is omitted, and the surface energy of the second UV transfer layer is not limited (the surface energy of the first UV transfer layer described above is greater than 36 dynes). For example, the second UV transfer layer may have a shore hardness of D30 to D80, a breaking elongation of 45% to 85% of the second UV transfer layer, a tensile breaking stress of 6 to 20Mpa, or the like. From this, shore hardness, fracture elongation and tensile fracture stress on second UV rendition layer when above-mentioned scope, both are favorable to the drawing of soft substrate and with the laminating of wide-angle casing base member, are favorable to the combination on second UV rendition layer and colour layer again, and the difficult fracture in second UV rendition layer and colour layer after the later stage laminating has further improved the outward appearance effect of the casing subassembly of preparing. Specifically, the material forming the second UV paste may include urethane acrylate. Specifically, the viscosity of the second UV glue can be 600-800 cps.

According to an embodiment of the present application, the second UV transfer layer may be formed by transferring the second UV paste onto the surface of the color layer and performing UV curing, and specifically, the second UV paste may be transferred onto one side of the color layer, a desired UV texture may be obtained by mold replication, and then UV curing may be performed, and energy of the UV curing may be 800 to 1500mj/cm²For example, it may be 900mj/cm²And may be 1000mj/cm²And can be 1300mj/cm²And can be 1400mj/cm²And the like. Thus, the second UV produced can be further increasedProperties of the transfer layer.

Specifically, the thickness of the second UV transfer layer may be 9 to 18 μm, for example, 10 μm, 12 μm, 14 μm, 16 μm, or the like. When the thickness of the second UV transfer printing layer is within the range, a good UV texture effect can be achieved, the combination of the second UV transfer printing layer and the color layer is facilitated, the bonding of the soft substrate and the large-angle bent shell base body is achieved, and the use performance of the prepared shell assembly is further improved.

According to an embodiment of the present application, referring to fig. 3, after forming the second UV transfer layer, the method may further include:

s250: forming an electroplated layer on the side of the second UV transfer printing layer far away from the color layer

In this step, a plating layer is formed by a vacuum plating method on the side of the second UV transfer layer formed in the previous step away from the color layer. Therefore, the electroplated layer can enable the prepared appearance membrane to have a good metal luster effect, and further improve the appearance effect of the prepared shell assembly. In addition, since the method according to the embodiment of the present application uses the soft substrate as the base material of the appearance film, when the plating layer is formed directly on the surface of the soft substrate by the electroplating method, the bonding force between the plating layer and the soft substrate is poor, and after the soft substrate is bonded to the appearance film bent at a large angle in a later stage, the plating layer is easily cracked, and the appearance effect is poor. In the method according to the embodiment of the present application, the electroplated layer is disposed on the side of the second transfer layer away from the color layer, and the distance between the electroplated layer and the soft substrate is relatively long, so that the bonding force between the electroplated layer and the soft substrate is relatively strong (the bonding force between the electroplated layer and the soft substrate can be improved by the first UV transfer layer, the second UV transfer layer, and the like between the electroplated layer and the soft substrate), and therefore, the appearance effect and the usability of the prepared housing assembly are further improved.

According to an embodiment of the present application, the plating layer may be formed by a Physical Vapor Deposition (PVD) method or a vacuum plating method, such as a vacuum non-conductive plating method (NVCM). In particular toThe material for forming the plating layer may include In/Sn, TiO₂、NbO₂、Nb₂O₃、Nb₂O₂、Nb₂O₅、SiO₂、ZrO₂At least one of (1). Specifically, the electroplated layer may include a plurality of electroplated metal sub-layers stacked together, that is, a plurality of the aforementioned materials may be electroplated separately on the side of the second UV transfer layer away from the color layer to form a plurality of laminated electroplated metal sub-layers. Specifically, the thickness of the plating layer may be 5 to 300nm, for example, 10nm, 50nm, 100nm, 120nm, 150nm, 200nm, 250nm, or the like. When the thickness of the electroplated layer is within the range, the prepared appearance membrane has a good metal luster effect, and the appearance effect of the prepared shell assembly is further improved.

According to an embodiment of the present application, referring to fig. 3, after forming the plating layer, the method may further include:

s260: printing a cover bottom ink on the side of the electroplated layer far away from the second UV transfer printing layer to form a cover bottom layer

In this step, the cover bottom ink is printed on the side of the plating layer away from the second UV transfer layer to form a cover bottom layer. According to the embodiment of the present application, the light transmittance of the cap and base layers is not more than 1%. Therefore, when the appearance membrane is attached to the shell substrate and used for a shell of electronic equipment and the like, the cover bottom layer can shield elements and the like in the electronic equipment, and the service performance of the shell assembly is further improved. Specifically, a cover bottom ink, such as a black ink, a white ink, or the like, may be printed on the side of the plating layer away from the second UV transfer layer to form the cover bottom layer. Specifically, the cover bottom layer may be formed of thermosetting Polyurethane (PU), the thickness of the cover bottom layer may be 10 to 30 μm, for example, 12 μm, 15 μm, 20 μm, 25 μm, and the like, and when the thickness of the cover bottom layer is within the above range, the cover bottom layer can better shield the components inside the electronic device, thereby further improving the usability of the housing assembly.

Specifically, the elongation at break of the cover bottom layer may be 50% to 150%, for example, 60%, 70%, 80%, 100%, 120%, 140%, or the like. Therefore, when the fracture elongation of the cover bottom layer is within the range, the soft substrate and the shell base body can be tightly attached, the binding force between the cover bottom layer and the electroplated layer is good, the cover bottom layer is not easy to crack, and the service performance of the shell assembly is further improved. When the fracture elongation of the cover bottom layer is too small, the cover bottom layer is easy to crack in the process of stretching and attaching the appearance membrane and the shell substrate bent at a large angle; when the fracture elongation of the cover bottom layer is too large, the binding force between the cover bottom layer and the electroplated layer is poor, and the appearance effect of the appearance membrane is poor.

Specifically, cover and bottom ink, such as black ink, white ink and the like, can be printed on the side of the electroplated layer away from the second UV transfer printing layer for multiple times, baking and curing are carried out, the baking temperature can be 65-85 ℃, the baking time can be 40-80min, the thickness of the cover and bottom layer formed after each baking is 6-10 μm, and the total thickness of the multiple times of printing can be 10-30 μm. Thus, the light leakage of the bottom layer of the cover can be further prevented by a method of repeatedly coating the bottom layer of the cover.

In conclusion, the shell assembly prepared by the method has the advantages of rich color gradient forms, unlimited color distribution, no noise point in color, difficult layering of color layers and better performance of the color layers. And this casing subassembly can have great radian, and the laminating is inseparable between outward appearance diaphragm and the casing base member, is difficult for the fracture, and this casing subassembly outward appearance is respond well, can promote product expression, improves production efficiency.

In another aspect of the present application, a housing assembly is presented. According to the embodiments of the present application, the housing assembly is prepared by the method for preparing the housing assembly as described above, and thus the housing assembly has all the features and advantages of the housing assembly prepared by the method for preparing the housing assembly as described above, and thus the description thereof is omitted. Generally speaking, this casing subassembly has great radian, and the laminating is inseparable between outward appearance diaphragm and the casing base member, and this casing subassembly colour gradual change form is abundant, and the outward appearance is respond well, and the product expressive force is strong.

In yet another aspect of the present application, a housing assembly is presented. According to an embodiment of the present application, the housing assembly may be prepared by the method of preparing a housing assembly as described above, thereby having all the features and advantages of the housing assembly prepared by the method of preparing a housing assembly as described above.

According to an embodiment of the present application, referring to fig. 7, the housing assembly 1000 includes: the appearance membrane 200 is arranged on one side of the shell base body 100. The housing base 100 has a bottom surface 110 and side walls 120 connected to the bottom surface 110 (the number of the side walls 120 may be 2, or may be 4 side walls 120 connected to each other as shown in fig. 2), and the bending angle between the side walls 120 and the bottom surface 110 is greater than 70 degrees. Referring to fig. 8, the appearance membrane 200 further includes: soft substrate 210, first UV transfer printing layer 220 and colour layer 230, first UV transfer printing layer 210 sets up in the one side that soft substrate 210 keeps away from casing base member 100, and colour layer 220 sets up in the one side that soft substrate 210 is kept away from to first UV transfer printing layer 220, and colour layer 220 is printed the formation through the air brushing. Therefore, the shell assembly 1000 has a large radian, the appearance membrane 200 and the shell base body 100 are tightly attached, the shell assembly 1000 is rich in color gradient forms, good in appearance effect and good in product expressive force.

According to an embodiment of the present application, the surface energy of the first UV transfer layer 220 may be greater than 36 dynes. Therefore, the surface energy of the first UV transfer printing layer 220 is large, and when the color layer 230 is formed on the surface of the first UV transfer printing layer 220, the surface of the first UV transfer printing layer 220 can be self-leveled by color ink, so that the surface flatness and uniformity of the formed color layer 230 are improved, and the color effect of the color layer 230 is improved. Specifically, the shore hardness of the first UV transfer layer 220 may be D30 to D80, the elongation at break of the first UV transfer layer 220 is 45% to 85%, and the tensile breaking stress of the first UV transfer layer 220 may be 6 to 20 MPa. Therefore, when the shore hardness, the elongation at break and the tensile breaking stress of the first UV transfer layer 220 are within the above ranges, the bonding force between the first UV transfer layer 220 and the soft substrate 210 is strong, when the appearance membrane 200 is attached to the housing base 100 bent at a large angle, the attachment is tight, the first UV transfer layer 220 and the soft substrate 210 are not easy to crack, and the appearance effect of the housing assembly 1000 is improved.

According to the embodiment of the application, the mixed ink can be sprayed and printed on the side of the first UV transfer layer 220 away from the flexible substrate 210 to form the color layer 230. Specifically, before the mixed ink is sprayed and printed, a plurality of single-color inks may be mixed in advance in proportion to form the mixed ink with a predetermined color, and then the mixed ink is printed on the side of the first UV transfer layer 220 away from the soft substrate 210, and after the mixed ink is printed, the mixed ink may be cured after the mixed ink is leveled, so as to form the color layer 230. Therefore, the color layer 230 formed by the method has rich color gradient forms, unlimited color distribution, no color noise, difficult layering of the color layer and good pattern effect. Specifically, the thickness of the color layer 230 may be 10 to 40 μm. Therefore, when the thickness of the color layer 230 is within the above range, the color layer 230 is uniform, and is not easy to crack, and the performance is good.

According to an embodiment of the present application, referring to fig. 9, the appearance membrane 200 may further include a second UV transfer layer 240, a plating layer 250, and a cover bottom layer 260, the second UV transfer layer 240 being disposed on a side of the color layer 230 away from the first UV transfer layer 220, the plating layer 250 being disposed on a side of the second UV transfer layer 240 away from the color layer 230, and the cover bottom layer 260 being disposed on a side of the plating layer 250 away from the second UV transfer layer 240. Therefore, the second UV transfer layer 240 can have abundant UV transfer textures, and the electroplated layer 250 can enable the appearance membrane 200 to have a good metallic luster effect, so that the appearance effect of the housing assembly 1000 is further improved; in addition, when the exterior film 200 is attached to the housing base 100 and used in a housing of an electronic device or the like, the cover bottom layer 260 can shield elements and the like inside the electronic device, thereby further improving the usability of the housing assembly 1000.

According to an embodiment of the present application, referring to fig. 10, the housing base 100 and the exterior film 200 may be bonded by a bonding adhesive 300. Specifically, the adhesive 300 may be applied to the side of the soft substrate 210 away from the first UV transfer layer 220, so that the appearance film 200 is attached to the side of the housing base 100 by the adhesive 300 after the appearance film 200 is manufactured.

In yet another aspect of the present application, an electronic device is presented. According to an embodiment of the present application, referring to fig. 11, the electronic device 1100 may include: the housing assembly 1000 is provided with a main board and a memory, and the appearance membrane 200 of the housing assembly is arranged towards the inside of the electronic device 1100; and the screen is arranged at the top of the shell component and is connected with the main board. Thus, the electronic device has all the features and advantages of the housing assembly described above, and thus, the description thereof is omitted. In general, the electronic device 1100 has a good appearance and a strong product expressive force.

For example, the electronic device may be any of various types of computer system devices that are mobile or portable and that perform wireless communications. In particular, the electronic device may be a mobile or smart phone (e.g., an iPhone (TM) based phone), a Portable gaming device (e.g., Nintendo DS (TM), PlayStation Portable (TM), Gameboy Advance (TM), iPhone (TM)), a laptop, a PDA, a Portable internet device, a music player, and a data storage device, other handheld devices, and a headset such as a watch, an in-ear headphone, a pendant, a headset, etc., and other wearable devices (e.g., a Head Mounted Device (HMD) such as an electronic necklace, an electronic garment, an electronic bracelet, an electronic necklace, an electronic tattoo, an electronic device, or a smart watch).

The electronic device may also be any of a number of electronic devices including, but not limited to, cellular phones, smart phones, other wireless communication devices, personal digital assistants, audio players, other media players, music recorders, video recorders, cameras, other media recorders, radios, medical devices, vehicle transportation equipment, calculators, programmable remote controllers, pagers, laptop computers, desktop computers, printers, netbook computers, Personal Digital Assistants (PDAs), Portable Multimedia Players (PMPs), moving picture experts group (MPEG-1 or MPEG-2) audio layer 3(MP3) players, portable medical devices, and digital cameras and combinations thereof.

In some cases, the electronic device may perform a variety of functions (e.g., playing music, displaying videos, storing pictures, and receiving and sending telephone calls). If desired, the electronic device may be a portable device such as a cellular telephone, media player, other handheld device, wristwatch device, pendant device, earpiece device, or other compact portable device.

The embodiments of the present application have been described in detail, but the present application is not limited to the details of the above embodiments, and various simple modifications can be made to the technical solution of the present application within the technical idea of the present application, and the simple modifications belong to the protection scope of the present application. It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention.

In the description herein, references to the description of "one embodiment," "some embodiments," etc., mean 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

1. A method of making a housing assembly, comprising:

providing a shell base body, wherein the shell base body is provided with a bottom surface and a side wall connected with the bottom surface, the bending angle between the side wall and the bottom surface is more than 70 degrees, and the shell base body is a glass base body; and

forming an appearance membrane and attaching the appearance membrane to one side of the housing base, the forming the appearance membrane further comprising:

providing a soft substrate, wherein the elongation of the soft substrate is 150-300%, and the material for forming the soft substrate comprises at least one of thermoplastic polyurethane, polyvinyl chloride and thermoplastic elastomer;

transferring a first UV glue on one side of the soft substrate so as to form a first UV transfer printing layer, wherein the first UV transfer printing layer is arranged on one side, far away from the shell base, of the soft substrate;

and spraying and printing mixed ink on one side of the first UV transfer printing layer, which is far away from the soft substrate, so as to form a color layer.

2. The method according to claim 1, wherein the soft substrate has a thickness of 0.025 to 0.15 mm.

3. The method of claim 1, wherein the surface energy of the first UV transfer layer is greater than 36 dynes.

4. The method of claim 1, wherein the first UV transfer layer has a Shore hardness of D30-D80.

5. The method according to claim 1, wherein the elongation at break of the first UV transfer layer is 45% to 85%.

6. The method according to claim 1, wherein the tensile breaking stress of the first UV transfer layer is 6-20 MPa.

7. The method according to claim 1, wherein the first UV transfer layer is formed to have a thickness of 4 to 10 μm.

8. The method of claim 1, wherein the first UV transfer layer is formed by transferring the first UV paste to the flexible substrate and performing UV curing, and the energy of the UV curing is 800-1500 mj/cm²。

9. The method of claim 8, wherein the first UV glue comprises urethane acrylate.

10. The method according to claim 1, wherein before the inkjet printing the mixed ink on the side of the first UV transfer layer away from the flexible substrate, the forming the color layer further comprises:

mixing a plurality of single color inks in proportion to the mixed ink having a predetermined color.

11. The method according to claim 10, wherein after the inkjet printing of the mixed ink on the side of the first UV transfer layer away from the flexible substrate, the forming the color layer further comprises:

and after the mixed ink is self-leveled, curing the mixed ink so as to form the color layer.

12. The method of claim 11, wherein the mixed ink self-leveling is achieved by:

and standing the printed mixed ink for 0.5-2min at 18-25 ℃.

13. The method of claim 11, wherein curing the mixed ink comprises: irradiating and curing the mixed ink by using a light emitting diode and a mercury lamp,the energy for irradiation and solidification is 900-²。

14. The method of claim 1, wherein the color layer is formed to have a thickness of 10 to 40 μm.

15. The method of claim 1, wherein after the forming the color layer, the method further comprises:

and transferring a second UV glue on one side of the color layer far away from the first UV transfer printing layer so as to form a second UV transfer printing layer.

16. The method according to claim 15, wherein the second UV transfer layer has a Shore hardness of D30-D80, an elongation at break of 45-85%, and a tensile stress at break of 6-20 MPa.

17. The method as claimed in claim 15, wherein the viscosity of the second UV paste is 600 to 800 cps.

18. The method according to claim 15, wherein the second UV transfer layer is formed to have a thickness of 9 to 18 μm.

19. The method of claim 15, wherein after the forming the second UV transfer layer, the method further comprises:

and forming an electroplated layer on the side of the second UV transfer printing layer far away from the color layer by a vacuum electroplating method.

20. The method as claimed in claim 19, wherein the plating layer is formed to have a thickness of 5 to 300 nm.

21. The method of claim 19, wherein the material forming the electroplated layer comprises In/Sn, TiO₂、NbO₂、Nb₂O₃、Nb₂O₂、Nb₂O₅、SiO₂、ZrO₂At least one of (1).

22. The method of claim 19 wherein said electroplated layer comprises a plurality of electroplated sublayers disposed in a stack.

23. The method of claim 19, wherein after the forming of the electroplated layer, the method further comprises:

printing a cover bottom ink on the side of the electroplated layer far away from the second UV transfer printing layer so as to form a cover bottom layer, wherein the light transmittance of the cover bottom layer is not more than 1%.

24. The method of claim 23, wherein the thickness of the cap and base layer is 10-30 μm.

25. The method of claim 23, wherein the cap floor layer has an elongation at break of 50% to 150%.

26. The method of claim 23, wherein the forming a cap layer further comprises: and printing the cover bottom printing ink for multiple times on one side of the electroplated layer, which is far away from the UV transfer printing layer, and baking and curing, wherein the thickness of the cover bottom layer formed after each baking is 6-10 mu m.

27. The method of claim 26, wherein the cap bottom layer is formed at a baking temperature of 65 to 85 ℃ for 40 to 80 min.

28. A housing component, characterized in that it is prepared by a method according to any one of claims 1-27.

29. A housing assembly, comprising:

the shell body is provided with a bottom surface and a side wall connected with the bottom surface, the bending angle between the side wall and the bottom surface is larger than 70 degrees, and the shell body is a glass body; and

an appearance membrane disposed on one side of the housing base, the appearance membrane further comprising:

the soft substrate has the elongation percentage of 150-300%, and the material for forming the soft substrate comprises at least one of thermoplastic polyurethane, polyvinyl chloride and thermoplastic elastomer;

the first UV transfer printing layer is arranged on one side, far away from the shell base body, of the soft substrate; and

the color layer, the color layer sets up first UV rendition layer is kept away from one side of soft substrate, the color layer is printed through the air brushing and is formed.

30. The housing assembly of claim 29, wherein the surface energy of the first UV transfer layer is greater than 36 dynes.

31. The housing assembly of claim 29, wherein the first UV transfer layer has a shore D hardness of D30-D80.

32. The housing assembly of claim 29, wherein the elongation at break of the first UV transfer layer is 45% to 85%.

33. The housing assembly of claim 29, wherein the first UV transfer layer has a tensile break stress of 6 to 20 MPa.

34. The housing assembly of claim 29, wherein the color layer has a thickness of 10 to 40 μm.

35. The housing assembly of claim 29, wherein the appearance membrane further comprises:

the second UV transfer printing layer is arranged on one side, far away from the first UV transfer printing layer, of the color layer;

the electroplated layer is arranged on one side, far away from the color layer, of the second UV transfer printing layer;

and the cover bottom layer is arranged on one side of the electroplated layer far away from the second UV transfer printing layer.

36. An electronic device, comprising:

the housing assembly of any of claims 28-35, defining a receiving space, the appearance membrane of the housing assembly being disposed toward an interior of the electronic device;

the main board and the memory are positioned in the accommodating space; and

the screen is arranged on the top of the shell assembly and connected with the main board.