CN110978832A

CN110978832A - Manufacturing method of shell, shell and electronic equipment

Info

Publication number: CN110978832A
Application number: CN201911318922.6A
Authority: CN
Inventors: 田振煌
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-04-10

Abstract

The application relates to the technical field of electronic equipment, and particularly discloses a manufacturing method of a shell, the shell and the electronic equipment, wherein the method comprises the following steps: providing a rolled base material, wherein the rolled base material comprises a first surface and a second surface which are arranged oppositely; gravure printing is performed on the first surface according to a predetermined design to form a gravure-printed pattern layer. By means of the mode, the processing efficiency of the shell can be improved, and the labor cost and the capacity cost are reduced.

Description

Manufacturing method of shell, shell and electronic equipment

Technical Field

The present disclosure relates to the field of electronic devices, and particularly, to a method for manufacturing a housing, and an electronic device.

Background

At present, the shell of the electronic device is usually manufactured by processing technologies such as offset printing, ink filling, ribbon transfer printing and the like by adopting a single sheet-shaped diaphragm, and because each processing step is relatively complex, when a plurality of sheet-shaped diaphragms are processed in the prior art, the labor cost and the production cost are greatly consumed, the manufacturing cost of the product is reduced by batch production, and the market competitiveness of the product is further influenced.

Disclosure of Invention

The method for manufacturing the shell, the shell and the electronic equipment are provided, so that the processing efficiency of the shell can be improved, and the labor cost and the capacity cost can be reduced.

The application provides a manufacturing method of a shell, which comprises the following steps: providing a rolled base material, wherein the rolled base material comprises a first surface and a second surface which are arranged oppositely; gravure printing is performed on the first surface according to a predetermined design to form a gravure-printed pattern layer.

The application provides a shell, which comprises a sheet shell membrane and is obtained by cutting a roll-shaped shell membrane; the roll-shaped housing diaphragm includes: the substrate is provided with a first surface and a second surface which are arranged oppositely; and a gravure-printed pattern layer disposed on the first surface.

The application proposes an electronic device, which comprises: the shell is the shell as described above; the display screen assembly is connected with the shell, and an installation space is defined between the display screen assembly and the shell; and the mainboard is arranged in the mounting space and is electrically connected with the display screen assembly.

The beneficial effect of this application is: different from the situation in the prior art, the gravure printing pattern layer is processed on the base material in a processing mode of roll material gravure printing by adopting a roll-shaped base material as a generation raw material, and the shell membrane obtained by gravure printing has the advantages of bright color, good adhesive force and high coloring yield. Meanwhile, each rolled base material can be cut into tens of thousands of flaky shell membranes in subsequent processing, so that the processing efficiency of the shell can be effectively improved, and the labor cost is reduced. Further, since the gravure printing die is high in the number of times of use and the gravure printing ink is low in cost, it is advantageous to reduce the manufacturing cost of each sheet-like housing film.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:

FIG. 1 is a schematic flow chart of a first embodiment of a method for making a housing according to the present application;

FIG. 2 is a schematic flow chart of a second embodiment of a method for making the housing of the present application;

FIG. 3 is a schematic flow chart of a third embodiment of a method for making the housing of the present application;

FIG. 4 is a schematic flow chart of a fourth embodiment of a method for making the housing of the present application;

FIG. 5 is a schematic flow chart of step S103 in FIG. 1;

FIG. 6 is a schematic flowchart of step S131 in FIG. 5;

FIG. 7 is a schematic flow chart of a fifth embodiment of a method of making the housing of the present application;

FIG. 8 is a schematic view of a rolled housing diaphragm;

FIG. 9 is a schematic view of a first structure at B in FIG. 8;

FIG. 10 is a second schematic view of the structure at B in FIG. 8;

FIG. 11 is a schematic structural view of the housing of the present application;

FIG. 12 is a schematic view of a third structure at B in FIG. 8;

FIG. 13 is a fourth structural schematic at B in FIG. 8;

fig. 14 is a schematic structural diagram of an embodiment of an electronic device according to 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 the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the prior art, the processes for realizing diversification of color patterns of the shell of the electronic equipment mainly comprise offset printing, ink filling and color ribbon transfer printing, but the processes all adopt single base materials to be processed, and the processing process flow of the base materials generally comprises the processes of LOGO printing, coloring, UV texture transfer printing, PVD brightening, bottom covering protection and the like, so that the processes need higher labor cost and energy production cost.

In order to overcome the defects in the prior art, the application provides a manufacturing method of a shell. Referring to fig. 1, fig. 1 is a schematic flow chart of a first embodiment of a method for manufacturing a housing according to the present application, the method including the following steps:

s101: a rolled substrate is provided.

Specifically, the roll base material is a transparent roll base material, and PET, PE, or the like can be used as the material of the roll base material. Preferably, the roll-shaped base material is made of PET, and has the advantages of good wear resistance, good high-temperature resistance and low cost.

The thickness of the rolled base material is 0.05 to 0.09 mm, for example, 0.05mm, 0.075 mm, 0.09 mm, and the thickness can be selected as required. The roll-shaped base material comprises a first surface and a second surface which are arranged oppositely.

S102: gravure printing is performed on the first surface according to a predetermined design to form a gravure-printed pattern layer.

Specifically, the first surface is subjected to gravure printing by using an intaglio printing press, wherein the intaglio printing press adopts a round-to-round direct printing mode, ink is fed by adopting an ink immersion mode or an ink jet mode, and a printing plate is directly manufactured on a printing plate cylinder. The gravure printing machine mainly comprises a unreeling machine for unreeling a roll-shaped base material, unreeling traction, a printing group, reeling traction and the like for the roll-shaped base material. The unwinding method for the rolled base material is mainly used for unwinding a material film at a certain speed under a certain tension condition, keeping a corresponding stable state and simultaneously completing automatic or manual splicing of the rolled base material. The main function of traction is to ensure that the coiled base material is unreeled to a printing unit material film in the printing process without deviation, and simultaneously ensure the stable tension of the coiled base material. The printing group is a main component of the gravure printing machine and completes the main processes of printing, including ink supply, printing, drying and the like. The rolling traction mainly ensures that the tension from the printing unit to the rolling is stable, and the quality of the printed product is improved. The printing process is completed in the rolling process, and the rolling effect can be guaranteed due to the stability of the rolling tension.

Different from the situation in the prior art, the gravure printing pattern layer is processed on the base material in a processing mode of roll material gravure printing by adopting a roll-shaped base material as a generation raw material, and the shell membrane obtained by gravure printing has the advantages of bright color, good adhesive force and high coloring yield. Meanwhile, each rolled base material can be cut into tens of thousands of flaky shell membranes in subsequent processing, so that the processing efficiency of the shell can be effectively improved, and the labor cost is reduced. Further, since the gravure printing die is high in the number of times of use and the gravure printing ink is low in cost, it is advantageous to reduce the manufacturing cost of each sheet-like housing film.

Referring to fig. 2, fig. 2 is a schematic flow chart illustrating a manufacturing method of a housing according to a second embodiment of the present application. Further, after step S102, the method further includes:

s103: and arranging a texture layer, an optical film layer and a bottom color layer on one side of the gravure printing pattern layer, which is back to the first surface, so as to obtain the rolled shell membrane.

Specifically, the thickness of the texture layer can be 0.004-0.006 mm, such as 0.004 mm, 0.005 mm, 0.006 mm. Therefore, the shell has a good texture effect, and the overall thickness of the shell is small. Alternatively, the texture layer may be formed on the gravure-printed pattern layer using a UV transfer process, the texture layer may be formed of colorless UV ink, and the texture layer may also be formed of colored UV ink. When the texture layer is formed by UV ink with colors, the texture layer has the effect that the shell has texture effect and simultaneously can have color effect. The texture layer may be a single layer or a plurality of layers.

The optical film layer may be an indium oxide layer, a tin oxide layer, or an indium tin oxide layer. For example, the indium oxide layer may be an indium oxide layer, the tin oxide layer may be a tin dioxide layer, and the indium tin oxide layer may be an indium tin oxide layer. It is worth noting that when the optical film layer adopts an indium oxide layer, a tin oxide layer or a laminated structure of the indium oxide layer and the tin oxide layer, the surface glaze texture and the fine optical texture effect can be simultaneously realized by combining the deep-color ground color layer, and different visual effects can be realized at different angles, so that the user experience is good. The thickness of the optical film layer is 30-50 nm, such as 30 nm, 40 nm, 50 nm.

The color of the base color layer is not particularly limited, and may be flexibly selected as desired by those skilled in the art as long as the requirements are satisfied, and may include, but is not limited to, red, orange, yellow, green, cyan, blue, violet, and the like, for example. Therefore, any different colors can be selected to meet the use requirements of different users. The thickness of the base color layer is 0.01-0.02 mm, such as 0.01 mm, 0.015 mm, 0.02 mm.

Step S102 may include the steps of: providing a gravure mould with a preset design pattern, and adding gravure printing ink into the gravure pattern of the gravure mould. And transferring the intaglio printing ink in the intaglio mold to a transfer medium. The intaglio printing ink in the transfer medium is transferred onto the first surface to form an intaglio printing pattern layer.

Specifically, the gravure printing machine comprises an unwinding mechanism, a gravure mold, a transfer printing mechanism and a winding mechanism which are sequentially arranged, after transfer printing media sequentially enter the gravure mold through the unwinding mechanism, the transfer printing media enter the transfer printing mechanism to transfer printing patterns onto a rolled base material, and finally the transfer printing media enter the winding mechanism.

Firstly, an unwinding mechanism unwinds a transfer medium; filling gravure printing ink into a gravure pattern of a gravure mold, and removing the redundant gravure printing ink by using a scraper so that the gravure printing ink is flush with the top surface of the gravure mold; the transfer printing medium enters the intaglio mold, and the pattern is copied onto the transfer printing medium through the intaglio mold; the transfer medium enters a transfer mechanism to transfer the transfer content on the transfer medium to the roll base material; and removing the transfer printing medium after the roll-shaped base material is cooled to form the gravure printing pattern layer.

By the mode, the transfer printing quality is effectively guaranteed, and the transfer printing effect is good; tension control is adopted for gravure printing, so that printing precision is effectively guaranteed, and transfer printing precision and effect are guaranteed.

Referring to fig. 3, fig. 3 is a schematic flow chart of a third embodiment of the method for manufacturing a housing according to the present application, where before step S102, the method further includes:

s104: a protective film is provided.

S105: and the protective film is attached to the second surface of the rolled base material through the release layer so as to protect the rolled base material.

Specifically, the protective film can prevent the rolled base material from being damaged during processing. The protective film comprises a PET protective layer and a release layer. The release layer is usually made of an organic insulating material such as PI, OC, or DBL.

Referring to fig. 4, fig. 4 is a schematic flow chart illustrating a method for manufacturing a housing according to a fourth embodiment of the present application. Further, after step S103, the method further includes:

s106: and cutting the rolled shell membrane into sheet shell membranes.

S107: and stripping the release layer.

S108: and bonding the sheet shell membrane with the transparent plate through OCA optical cement to obtain the shell.

Specifically, firstly, the transparent plate is cut and polished by a CNC (computer numerical control) process to obtain the transparent plate with a target size, wherein a groove for accommodating the sheet-shaped shell membrane is formed in the transparent plate. And cutting the rolled shell membrane into sheet shell membranes with the size suitable for the groove of the transparent plate, wherein the cutting precision is +/-0.05 mm. OCA optical cement is arranged in the groove of the transparent plate, wherein the OCA optical cement can be coated or laminated. And finally, attaching a sheet shell membrane with a proper size in the groove for fixing to obtain the shell.

Wherein, the transparent plate is made of glass, toughened glass, sapphire, acrylic or transparent plastic material. The transparent plate may include, but is not limited to, 2D, 2.5D, 3D transparent plates.

Further, the transparent plate is cut and polished by a CNC process to obtain the target transparent plate, and the specific operations are as follows: firstly, CNC processing treatment is carried out on the transparent plate so as to enable the transparent plate to have an arc-shaped edge, and then forming treatment is carried out on the target transparent plate with the arc-shaped edge based on the target shape so as to obtain the target transparent plate.

Thus, the transparent plate prepared can be easily provided with a target shape and a curved edge. According to the embodiment of the present application, the specific manner of performing the molding process is not particularly limited, and only the objective transparent plate material having a desired shape is obtained.

For example, the molding process may be realized by hot press molding or CNC profile processing. According to the specific embodiment of this application, can be earlier carry out CNC processing to transparent panel, make it have the arc edge, realize 2.5D's outward appearance effect, then carry out hot pressing to the transparent panel that has the arc edge again, make transparent panel surface have the arc structure, the transparent panel who from this prepares has 3D's outward appearance effect.

The hot press molding can be formed by a high-pressure forming machine table and comprises the steps of loading a plate, baking and softening the plate by IR (infrared ray), closing the die, filling high-pressure gas, maintaining the pressure, opening the die and taking out a product and the like. Wherein the baking temperature of the IR baking (infrared baking) is 300-. Preferably, the IR baking is carried out at a baking temperature of 400 ℃ for 30 seconds, a mold temperature of 135 ℃ for holding pressure, and an air pressure of 70kg for 15 seconds.

According to the embodiment of the present application, the shape of the transparent plate obtained by the CNC processing and the forming process is not particularly limited, and may be selected by those skilled in the art according to actual circumstances. For example, the target transparent plate with a four-curved-surface structure and a 3D visual effect can be obtained, and is suitable for being used as a shell of electronic equipment.

In order to further improve the performance of the target transparent plate prepared by the method, after CNC machining is performed to form an arc-shaped edge, ultrasonic cleaning treatment and surface strengthening treatment are performed to further strengthen the formed arc-shaped edge. In addition, after the forming treatment, the prepared target transparent plate can be subjected to full inspection, so that the target transparent plate with excellent quality and good performance can be obtained.

According to the embodiment of the present application, the thickness of the target transparent plate finally prepared by the method is not particularly limited, and can be selected by those skilled in the art according to actual requirements. For example, the thickness of the target transparent plate material prepared may be 0.85 ± 0.08 mm. According to a specific example of the present application, the thickness of the prepared target transparent plate may be 0.85 mm. According to the embodiment of the application, the width and the height of the arc-shaped edge formed by performing the CNC machining process are not particularly limited, and can be selected by a person skilled in the art according to actual needs. For example, the arcuate edge may have a width of 1.6 ± 0.08 millimeters and a height of 0.3 ± 0.08 millimeters. According to a specific embodiment of the present application, the arcuate edge may have a width of 1.6 millimeters and a height of 0.3 millimeters.

Referring to fig. 5, fig. 5 is a schematic flowchart of step S103 in fig. 1, in an embodiment, step S103 specifically includes:

s131: and transferring the target texture to the side, opposite to the first surface, of the gravure printing pattern layer to form a texture layer.

S132: and forming an optical film layer on one side of the texture layer, which is back to the gravure printing pattern layer, by adopting a vacuum evaporation method, a magnetron sputtering method or an electron beam evaporation method.

Specifically, after the metal target material is evaporated, the rolled substrate is placed in a vacuum environment, and the evaporated metal target material is deposited on one side of the texture layer, which is back to the gravure printing pattern layer, so as to form the optical film layer.

In the embodiment of the present application, the optical film layer may be formed by sputtering, and the sputtering process is a process of bombarding a solid surface with particles (ions or neutral atoms, molecules) with a certain energy, so that the atoms or molecules near the surface of the solid obtain a sufficient energy to finally escape from the solid surface. Sputtering can only be performed under a certain vacuum condition. The metal target is dissolved by directly heating or indirectly heating, and then evaporated (or directly sublimated from a solid into gas), atoms or molecules with enough energy fly to and are sputtered on the surface of a workpiece, and an optical film layer with a certain thickness is deposited. The thickness of the optical film layer directly influences the color depth, different thicknesses correspond to colors of different depths, and the optical film layer is matched with the texture of the texture layer.

The material of the optical film layer may be an indium oxide layer, a tin oxide layer, or an indium tin oxide layer. For example, the indium oxide layer may be an indium oxide layer, the tin oxide layer may be a tin dioxide layer, and the indium tin oxide layer may be an indium tin oxide layer, or may be other metals meeting the process conditions, which is not limited in this application.

Further, the length of the plating time is determined according to the effect, and the longer the plating time is, the thicker the film thickness is, and the brighter the metallic luster effect is. The optical film layer is a metal film, and the thicker the film thickness is, the brighter the metallic luster effect is; and the thinner the thickness, the greater the impedance. The thickness is controlled by the coating time. In this embodiment, the thickness of the optical film layer is not more than 50 μm, and the impedance of the optical film layer is not less than 4000 megohms.

S133: and (3) coating base color ink on one side of the optical film layer, which is opposite to the texture layer, for multiple times by adopting a silk-screen, roller coating or spin coating process to form a base color layer.

Specifically, the base color layer is a multilayer structure sequentially arranged in the thickness direction, and can be formed by coating base color ink for multiple times, and the number of the base color layers is not limited in the embodiments of the present application. The thickness of each bottom color layer is 0.006-0.01 mm, such as 0.006 mm, 0.008 mm, 0.009 mm, 0.01 mm; the baking temperature is 75-95 ℃, for example, 75 ℃, 80 ℃, 85 ℃ and 95 ℃; the baking time is 30 to 60 minutes, for example, 30 minutes, 40 minutes, 50 minutes, 60 minutes. Preferably, the ground color layer comprises a first ground color layer, a second ground color layer and a third ground color layer which are sequentially superposed, wherein the first ground color layer is close to the optical film layer, white ink is printed on the optical film layer for the first time, the baking temperature is 90 ℃, the baking time is 30 minutes, and the first ground color layer with the thickness of 0.006-0.01 mm is formed; printing white ink for the second time, wherein the baking temperature is 90 ℃, and the baking time is 30 minutes, so that a second bottom color layer with the thickness of 0.006-0.01 mm is formed; and printing white ink for the third time, wherein the baking temperature is 90 ℃, and the baking time is 60 minutes, so that a third bottom color layer with the thickness of 0.006-0.01 mm is formed. The bottom color layer can ensure the opacity of the shell, so that the pattern texture effect of the shell is better.

Referring to fig. 6, fig. 6 is a schematic flowchart of step S131 in fig. 5, in an embodiment, step S131 specifically includes:

s1311: a transfer mold having a target texture is provided.

S1312: and adding UV glue into the transfer printing mold.

The type of UV glue is not particularly limited according to embodiments of the present application and may be selected by those skilled in the art according to actual needs.

S1313: and putting the roll-shaped base material into a transfer printing mold, and pressing the transfer printing mold to form a UV adhesive layer with texture on the side of the gravure printing pattern layer opposite to the first surface.

S1314: and curing the UV adhesive layer with the texture by using ultraviolet rays to form a texture layer.

Specifically, the target texture in the transfer mold is transferred onto the side of the gravure pattern layer facing away from the first surface by UV glue. According to the embodiment, the texture layer can be formed by firstly printing the UV glue on a transfer mold with a target texture in a screen printing mode; then, the rolled base material is put on a transfer mold, wherein the side having the optical film layer is in contact with the transfer mold; then, the roll-shaped base material is tightly pressed on a transfer printing mold through a rubber roller, and then the roll-shaped base material is irradiated below the transfer printing mold through an LED lamp, so that the UV glue is primarily cured, and the curing energy is generally 1200-2600 mj-cm²E.g. 1200mj/cm²、1500mj/cm²、2000mj/cm²、2600mj/cm². Then, the rolled base material and the transfer mold bonded together are irradiated by a mercury lamp to perform secondary curing, and the curing energy is generally 800 to 1500mj/cm²E.g. 800mj/cm²、1000mj/cm²、1200mj/cm²、1500mj/cm². And finally, taking the transferred roll base material out of the transfer printing mold, and finally forming a texture layer on the roll base material.

According to the embodiment of the present application, the texture type (e.g., texture shape, texture color) of the formed texture layer is not particularly limited, and may be selected by those skilled in the art according to actual needs. For example, a transfer mold having a target texture may be fabricated to realize the design of different texture layers, and more particularly, the texture layers may include light pillars, S-stripes, which can move light shadows, peacock stripes having a high reflection effect, and at least one of colorful stripes, which can obtain seven colors.

The thickness of the texture layer is not particularly limited according to the embodiment of the present application, and may be selected by those skilled in the art according to actual needs. For example, the texture layer may have a thickness of 10 to 50 μm. In some embodiments of the present application, the textured layer has a thickness of 10 microns, 15 microns, 18 microns, or 20 microns. According to the embodiment of the present application, the light transmittance of the texture layer is not particularly limited, and may be selected by those skilled in the art according to actual requirements. For example, the light transmittance of the texture layer may be 20% to 60%. The inventor finds that the method can obtain target texture layers with various appearance patterns, the surface of the obtained texture layer is bright and smooth, wear-resistant and press-resistant, the thickness can be regulated and controlled, and the appearance effect of the prepared shell is remarkably improved.

Referring to fig. 7, fig. 7 is a schematic flow chart of a fifth embodiment of the method for manufacturing a housing according to the present application, in an embodiment, before step S102, the method further includes:

s109: a LOGO layer is disposed on the first surface.

Wherein, the LOGO layer is positioned between the roll-shaped base material and the gravure printing pattern layer.

Specifically, the LOGO layer can be formed by a screen printing mode, and the thickness of the LOGO layer is 0.001-0.005 mm, such as 0.001 mm, 0.002 mm, 0.004 mm and 0.005 mm. The shape of the LOGO layer can be changed according to design requirements, such as Chinese characters, letters, symbols, animals and the like, which is not limited in this embodiment. This embodiment is through increasing the LOGO layer in the casing after, the popularity and the identification degree that can greatly increased product.

Referring to fig. 8 and 9, fig. 8 is a schematic structural view of a roll case diaphragm, and fig. 9 is a first structural view at B in fig. 8.

The housing 100 includes: a sheet-like housing membrane 11. Wherein, the sheet-shaped shell membrane 11 is obtained by cutting the roll-shaped shell membrane 20. It is understood that the sheet-like housing membrane 11 is cut from the roll-like housing membrane 20, and therefore, the structure of the sheet-like housing membrane 11 can be as shown in fig. 8.

The roll case membrane 20 includes: a base material 21 and a gravure-printed pattern layer 22. The substrate 21 has a first surface 212 and a second surface 212 which are oppositely arranged, and the gravure-printing pattern layer 22 is arranged on the first surface 212.

Be different from prior art's condition, the sheet-like casing diaphragm of this application adopts the substrate as generating the raw materials, processes out the intaglio printing pattern layer through the processing mode of coil stock intaglio printing on the substrate, and the casing diaphragm that the intaglio printing obtained has bright-colored, the adhesive force is good, the high advantage of the yield of coloring. Meanwhile, each base material can be cut into tens of thousands of flaky shell membranes in subsequent processing, so that the processing efficiency of the shell can be effectively improved, and the labor cost is reduced. Further, since the gravure printing die is high in the number of times of use and the gravure printing ink is low in cost, it is advantageous to reduce the manufacturing cost of each sheet-like housing film.

Referring to fig. 10, fig. 10 is a schematic diagram of a second structure at B in fig. 8. The rolled housing membrane 20 further comprises: a texture layer 23, an optical film layer 24, and a base color layer 25. The material of the base material 21 is PET.

The gravure-printed pattern layer 22, the texture layer 23, the optical film layer 24, and the base color layer 25 are sequentially stacked on the first surface 211.

Wherein the thickness of the base material 21 is 0.05-0.09 mm; the thickness of the gravure printing pattern layer 22 is 0.004-0.006 mm; the thickness of the texture layer 23 is 0.004-0.006 mm; the thickness of the optical film layer 24 is 30-50 nanometers; the thickness of the ground color layer 25 is 0.01 to 0.02 mm.

Referring to fig. 11, fig. 11 is a schematic structural diagram of the housing according to the present application. The housing 10 further includes: a transparent plate 12 and an OCA optical cement layer 13 disposed between the sheet-shaped housing membrane 11 and the transparent plate 12.

The OCA optical adhesive has the characteristics of colorless transparency, light transmittance of over 90 percent, good bonding strength, capability of being cured at room temperature or middle temperature, small curing shrinkage and the like. The OCA optical cement is selected as the adhesive, so that the light transmittance of the product can be increased, and the aesthetic feeling is improved.

In this embodiment, the light transmittance of the OCA optical adhesive layer 13 is greater than or equal to 99%, and the peeling force of the OCA optical adhesive layer 13 is greater than or equal to 30N; the transparent plate 12 is made of glass, toughened glass, sapphire, acrylic or transparent plastic material.

Referring to fig. 12, fig. 12 is a schematic diagram of a third structure at B in fig. 8. The housing 100 further includes: a LOGO layer 26 disposed between the substrate 21 and the gravure pattern layer 22. The thickness of the LOGO layer 26 is 0.001-0.005 mm, such as 0.001 mm, 0.002 mm, 0.003 mm, 0.005 mm.

The material of the optical film layer 24 of the above embodiment includes at least one of indium, aluminum, zinc and indium-tin alloy, and the resistance value of the optical film layer 24 is equal to or greater than 4000 megohms.

Preferably, the optical film 24 is an indium tin film, which plays a role of reflecting light and providing metallic luster effect, and the indium tin film is a non-conductive metal film when being thin, and can reflect light like a mirror surface.

Referring to fig. 13, fig. 13 is a fourth structural diagram at B in fig. 8. The base color layer 25 of the above embodiment is a multilayer structure; wherein, the dyne value of the outermost bottom color layer 251 facing away from the optical film layer 24 is greater than 32, and the thickness of the bottom color layer 251 is 0.006-0.01 mm, such as 0.006 mm, 0.007 mm, 0.008 mm, 0.01 mm.

For the embodiment of the housing 100, please refer to the partial description of the embodiment of the manufacturing method of the housing.

Referring to fig. 14, fig. 14 is a schematic structural diagram of an embodiment of an electronic device according to the present application. The electronic device 200 may be a cell phone, a tablet computer, an e-book reader, an audio player, a digital camera, a laptop portable computer, a vehicle computer, a desktop computer, a personal digital assistant, a wearable device, and the like. The electronic apparatus 200 includes: a housing 1, a display screen assembly 2 and a main board (not shown).

The housing 1 is a housing 100 provided in the above embodiments. The display screen assembly 2 is connected to the housing 1, and an installation space is defined between the display screen assembly 2 and the housing 100. The mainboard is established in installation space and is connected with display screen subassembly 2 electricity.

The above embodiments are merely examples, and not intended to limit the scope of the present application, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present application, or those directly or indirectly applied to other related arts, are included in the scope of the present application.

Claims

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

providing a rolled substrate, wherein the rolled substrate comprises a first surface and a second surface which are arranged oppositely;

gravure printing is performed on the first surface according to a predetermined design to form a gravure-printed pattern layer.

2. The method of claim 1, wherein after the step of gravure printing on the first surface according to a predetermined design to form a gravure-printed pattern layer, the method further comprises:

and sequentially arranging a texture layer, an optical film layer and a bottom color layer on one side of the gravure printing pattern layer back to the first surface to obtain the rolled shell membrane.

3. The method of claim 1,

the coiled base material is made of PET.

4. The method of claim 3, wherein prior to the step of gravure printing on the first surface according to a predetermined design to form a gravure-printed pattern layer, the method further comprises:

providing a protective film, wherein the protective film comprises a PET protective layer and a release layer;

and the protective film is attached to the second surface through the release layer so as to protect the rolled base material.

5. The method of claim 4, wherein after the step of sequentially disposing the texture layer, the optical film layer and the base color layer on the side of the intaglio printing pattern layer opposite to the first surface to obtain the roll casing membrane, the method further comprises:

cutting the rolled shell membrane into sheet shell membranes;

stripping the release layer;

and bonding the sheet shell membrane with a transparent plate through OCA optical cement to obtain the shell.

6. A housing, characterized in that the housing comprises:

the sheet-shaped shell membrane is obtained by cutting a roll-shaped shell membrane;

the rolled housing diaphragm comprises:

a substrate having a first surface and a second surface disposed opposite to each other; and

a gravure-printed pattern layer disposed on the first surface.

7. The housing of claim 6 wherein said rolled housing membrane further comprises:

the texture layer, the optical film layer and the bottom color layer are sequentially stacked on the gravure printing pattern layer;

wherein the thickness of the base material is 0.05-0.09 mm;

the thickness of the gravure printing pattern layer is 0.004-0.006 mm;

the thickness of the texture layer is 0.004-0.006 mm;

the thickness of the optical film layer is 30-50 nanometers;

the thickness of the bottom color layer is 0.01-0.02 mm.

8. The housing of claim 6,

the rolled shell membrane is made of PET.

9. The housing of claim 6, further comprising:

the OCA optical adhesive layer is arranged between the flaky shell membrane and the transparent plate;

the light transmittance of the OCA optical adhesive layer is greater than or equal to 99%, and the peeling force of the OCA optical adhesive layer is greater than or equal to 30N;

the transparent plate is made of glass, toughened glass, sapphire, acrylic or transparent plastic materials.

10. An electronic device, comprising:

a housing according to any one of claims 6 to 9;

the display screen assembly is connected with the shell, and an installation space is defined between the display screen assembly and the shell; and

the mainboard is arranged in the installation space and is electrically connected with the display screen assembly.