CN112135454B

CN112135454B - Diaphragm manufacturing method, shell and electronic equipment

Info

Publication number: CN112135454B
Application number: CN202011020946.6A
Authority: CN
Inventors: 张维; 张雅雯; 吕迪爽
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2022-03-04
Anticipated expiration: 2040-09-24
Also published as: CN112135454A

Abstract

The application discloses a manufacturing method of a diaphragm, a shell and electronic equipment, wherein the manufacturing method of the diaphragm comprises the following steps: extracting a lens section curve model according to the preset lens depth of field, and cutting a curve to form a plurality of triangular units; sequentially arranging a plurality of triangular units on a preset plane along a curve to form a diaphragm section curve model; preparing a female die according to the diaphragm section curve model; preparing a sub-mold opposite to the curve direction of the female mold according to the female mold; transferring the sub-die to manufacture a pattern layer on a sheet, plating a reflection film layer on the pattern layer, and printing an ink layer on the reflection film layer; and carrying out CNC cutting on the sheet to obtain the membrane. The manufacturing method of the diaphragm, the shell and the electronic device can enable the depth of field effect of the texture patterns of the shell to be good, and the visual effect of a user is optimized.

Description

Diaphragm manufacturing method, shell and electronic equipment

Technical Field

The application belongs to the technical field of communication, and particularly relates to a manufacturing method of a diaphragm, a shell and electronic equipment.

Background

With the popularization of electronic devices such as mobile phones, people have increasingly high requirements on the aesthetic appearance of the electronic devices. The shell is used as a component which has great influence on the appearance of the electronic equipment in the electronic equipment, and pattern effect design is usually carried out on the appearance of the shell in the industry so as to improve appearance expressive force. However, in the related art, the depth of field effect of the texture pattern on the electronic device shell is not good, and the visual effect is poor.

Disclosure of Invention

An object of the embodiments of the present application is to provide a method for manufacturing a membrane, a housing, and an electronic device, which can solve the problem of poor visual effect of the texture pattern of the existing housing.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, an embodiment of the present application provides a method for manufacturing a diaphragm, where the method includes the following steps:

extracting a lens section curve model according to the preset lens depth of field, and cutting a curve to form a plurality of triangular units;

sequentially arranging a plurality of triangular units on a preset plane along a curve to form a diaphragm section curve model;

preparing a female die according to the diaphragm section curve model;

preparing a sub-mold opposite to the curve direction of the female mold according to the female mold;

transferring the sub-die to manufacture a pattern layer on a sheet, plating a reflection film layer on the pattern layer, and printing an ink layer on the reflection film layer;

and carrying out CNC cutting on the sheet to obtain the membrane.

In a second aspect, an embodiment of the present application provides a housing, including:

a light-transmitting substrate;

the diaphragm is prepared by the manufacturing method of the diaphragm;

the side face, far away from the ink layer, of the diaphragm is attached to the light-transmitting substrate.

In a third aspect, an embodiment of the present application provides an electronic device, which includes the above-mentioned housing.

In the embodiment of the application, the diaphragm manufactured by the manufacturing method can meet the requirement of a specific ID effect, the depth of field effect of the texture pattern is good, the thin diaphragm and the shell can have the depth of field vision, the pattern display effect of the shell in the electronic equipment is improved, and the mysterious feeling and the value feeling of a product are enhanced.

Drawings

FIG. 1 is a 3D schematic diagram of a target object in an embodiment of the present application;

FIG. 2 is a block diagram of a cross-sectional curve model of a lens according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a triangular unit formed by cutting curves in the embodiment of the present application;

FIG. 4 is a schematic view of a cross-sectional curve model of a diaphragm in an embodiment of the present application;

FIG. 5 is a schematic structural view of a master model in an embodiment of the present application;

FIG. 6 is a schematic view of a daughter mold transferred by a master mold in an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a metal film layer in an embodiment of the present application;

FIG. 8 is a flow chart of a method of making a diaphragm in an embodiment of the present application;

in the figure: 1. a target object; 2. a lens cross-sectional curve model; 21. a triangle unit; 3. a female die; 31. a diaphragm section curve model; 4. a sub-mold; 51. a titanium oxide layer; 52. a silicon oxide layer.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. 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.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The manufacturing method of the diaphragm, the housing and the electronic device provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings by specific embodiments and application scenarios thereof, where the housing may be a rear cover of the electronic device, but is not limited thereto.

As shown in fig. 8 and referring to fig. 1 to 7, the present embodiment provides a method for manufacturing a diaphragm, which includes the following steps:

step 101: the lens section curve model 2 is extracted according to the preset lens depth of field, the cutting curve forms a plurality of triangular units 21, and the curve can be cut with equal width. The cut lens section curve model 2 is a cut curve.

First, referring to fig. 1, a predetermined lens depth, that is, a target object 1 having a predetermined lens depth effect, a lens section curve model 2 is extracted at a cross section of the target object 1, and a depth of the lens section curve model 2 corresponds to a depth of a texture pattern of the target object 1. The target object 1 is a shell with a better visual depth effect. It should be noted that the target object 1 represents a model of the back cover, and not an actual object. And cutting the model of the rear cover to obtain a cross section, extracting a lens section curve model 2 from the cross section, wherein the depth of each point of the extracted lens section curve model 2 is consistent with the depth of the corresponding point of the texture pattern of the target object 1.

Optionally, as shown in fig. 2, the curve is an arc segment, which enables the arc segment to be a bilateral symmetric structure, so that a subsequent diaphragm manufactured according to the arc segment has bilateral symmetric texture patterns, and is visually attractive.

Next, as shown in fig. 3, the cutting curve forms a plurality of triangular units 21. The triangular unit 21 has a curved hypotenuse which is collinear with the curve and two legs. The width of the triangular units 21 is the same, i.e. the length of the right-angle side of the triangular units 21 in the horizontal direction is the same. And the length of the cathetus in the vertical direction of the triangular unit 21 is related to the change in curvature of the hypotenuse, i.e. the greater the change in curvature of the hypotenuse, the longer the length of the cathetus in the vertical direction of the triangular unit 21.

Optionally, the cutting width of the curve is 10 μm to 50 μm, so that the hypotenuse of the curve of the cut triangular unit 21 can better represent the curvature change of the texture pattern at the corresponding point, which helps to make the prepared film have better depth of field vision and stronger transparency.

Further optionally, the cut width of the curve is 20 μm, which helps to further improve the depth of field effect of the film produced by the film production method.

Step 102: the triangular units 21 are sequentially arranged on a predetermined plane along a curve to form a diaphragm sectional curve model 31. That is, the respective triangular units 21 are arranged on the same horizontal line in the direction in which the curve extends to form the diaphragm sectional curve model 31. The triangular units 21 are connected in sequence, and no gap exists between every two adjacent triangular units 21. The diaphragm section curve model 31 is also a cross-sectional view of the master model. The mold is then made from the cross-sectional view of the master mold 31.

Step 103: and preparing a female die 3 according to the diaphragm section curve model.

Optionally, the metal plate is processed according to the diaphragm section curve model to obtain the master model 3. Wherein the processing equipment is Mole six-axis mechanical processing equipment. In the process of machining the metal plate, the cutter can swing by a corresponding angle as required to ensure that the size of each part of the manufactured female die 3 is matched with the size of the curve model of the section of the diaphragm, so that the accuracy of the female die 3 is ensured.

Optionally, the metal plate is a nickel-plated steel plate, and a nickel layer on the steel plate has a thickness of 50 μm to 100 μm, and the metal plate is processed on the nickel layer. The hardness, wear resistance and stability of the texture pattern formed by processing on the nickel layer are better, so that the transfer printing of the texture pattern of the master model 3 is convenient. The depth of the pattern texture is about 10 mu m, processing errors exist in the nickel layer processing, and the phenomenon that the nickel layer needs to be processed again is further caused, the thickness of the nickel layer of 50 mu m-100 mu m ensures that the whole unqualified processing layer can be cut under the condition that the processing is not qualified, and then the processing is continued on the plane of the cut nickel layer, so that the processing efficiency is improved, and the qualified female die 3 is favorably formed in the processing.

In addition, the process of forming the master model on the nickel-plated steel plate has the following advantages: firstly, the stability of the electroplated nickel layer in air is high; secondly, because the metal nickel has strong passivation capability, a layer of extremely thin passivation film can be rapidly generated on the surface of the steel plate, and further, the corrosion of atmosphere, alkali and certain acid can be well resisted; thirdly, the nickel layer has higher strength, and the processing on the nickel layer not only improves the strength of the female die 3, but also is beneficial to ensuring the structural stability of the female die 3; thirdly, the hardness of the electroplated nickel layer is good, and the wear resistance of the surface of the steel plate can be improved; and thirdly, the nickel crystal of the nickel layer is extremely fine and has excellent polishing performance, the polished nickel layer can obtain mirror-like gloss appearance, and meanwhile, the gloss can be kept in the atmosphere for a long time, so that the surface of the nickel-plated steel plate has better gloss, and the sub-mold 4 after transfer printing has better appearance.

Step 104: a daughter mold 4 is prepared from the master mold 3 in the direction opposite to the curve direction of the master mold 3. Namely, the sub-mold 4 is manufactured by copying the master mold 3.

Alternatively, the master 3 is transferred on a PC board to form a daughter mold 4.

Specifically, the sub mold 4 is manufactured by transferring the grain pattern of the master mold 3 to a PC board by means of UV transfer. The PC board is also called as a polycarbonate board, has the characteristics of high transparency, light weight, impact resistance, sound insulation, heat insulation, flame retardancy, aging resistance and the like, and is an energy-saving and environment-friendly plastic board with high technology and extremely excellent comprehensive performance. The sub-mold 4 is manufactured by transferring the master mold 3, the operation is simple, and the accuracy of the sub-mold 4 is ensured. The grain pattern of the sub mold 4 is opposite to the grain pattern of the master mold 3.

Step 105: transferring the sub-die 4 to manufacture a pattern layer on a sheet, plating a reflection film layer on the pattern layer, and printing an ink layer on the reflection film layer;

specifically, the texture pattern on the sub-mold 4 is transferred to the sheet by means of UV transfer, forming a pattern layer.

The UV transfer printing process uses a UV transfer printing machine. That is, the UV transfer machine forms the grain pattern on the sub mold 4 on the sheet using the UV transfer paste, and the UV transfer paste attached to the surface of the sheet forms the pattern layer.

Optionally, the material of the sheet is polyethylene terephthalate, that is, the sheet is a PET sheet. The PET sheet is a novel material developed in recent years, and is gradually subjected to great smell of consumers and producers due to excellent toughness, high strength and high transparency, and the excellent environmental protection performance of being recyclable and not producing harmful gas during combustion.

Because the PET sheet has excellent transparency and smoothness, the display effect of the grain patterns printed on the sheet is good. In addition, the PET sheet has excellent surface decoration performance, and is convenient for printing texture patterns on the surface of the PET sheet.

In addition, the PET sheet material enables the prepared membrane to have good mechanical strength; moreover, the barrier property of the membrane to oxygen and water vapor is good; in addition, the chemical resistance of the membrane is good, and the membrane can resist corrosion of various chemical substances.

The transfer results in the textured pattern on the sheet being the inverse of the textured pattern on the daughter mold 4 and the same as the textured pattern on the master mold 3.

Since the pattern layer has high transmittance, it is not easy to see the 3D texture pattern, and therefore, a reflective film layer needs to be coated on the pattern layer, and only after the reflective film layer is coated, the texture printed on the sheet and the gloss caused by the texture can be clearly seen by the user.

Optionally, the plating of the reflective film layer on the pattern layer includes:

first, a metal target is heated under vacuum conditions.

Optionally, placing the sheet in a vacuum processing oven with the surface of the sheet having the textured pattern layer facing upward; then, heating the metal target in a vacuum processing furnace, wherein the metal target can be directly heated or indirectly heated; the metal target material is heated and evaporated, namely the metal target material is sublimated into particles of the metal target material from solid.

And secondly, depositing the particles of the metal target material on the pattern layer to obtain the reflecting film layer. Under the action of glow discharge, atoms or molecules of the metal target material with enough energy fly to and are deposited on the surface of the texture pattern layer to form a metal reflection film layer with a layer thickness, and the metal reflection film layer has strong mixed reflection texture and can better reflect the texture pattern layer, so that a user has better visual effect.

Optionally, the heating temperature of the metal target is 60-70 °. The metal target can be sublimated into gas from solid stably at the temperature, so that the deposition of particles of the metal target on the surface of the texture pattern layer is facilitated, a stable and uniform reflection film layer is formed on the surface of the texture pattern layer conveniently, the reflection effect of the reflection film layer is promoted, and the visual presentation of the texture pattern is facilitated.

Optionally, the metal target is silicon oxide or titanium oxide. The silicon oxide or the titanium oxide has good heating sublimation effect, and is favorable for forming a uniform reflecting film layer after the deposition on the surface of the ideal pattern layer and the reflection of light.

Optionally, the reflective film layer has a titanium oxide layer 51 and a silicon oxide layer 52, and the silicon oxide layer 52 is located between two titanium oxide layers 51. The three reflecting film layers are deposited on the surface of the texture pattern layer, so that the stability of the reflecting film layers is guaranteed, and the reflection of the reflecting film layers is facilitated.

Specifically, an ink layer is printed on the reflective film layer. The ink layer with the designated color can be printed on the reflecting film layer according to the requirement. And a plurality of colored ink layers can be plated on the reflecting film layer according to the requirement. Optionally, the ink layer is white, so that the 3D texture pattern can be well displayed. In addition, the ink layer can well protect the texture pattern layer.

Optionally, printing a plurality of ink layers on the reflective film layer, wherein the thickness of each ink layer is 7 μm to 9 μm. The multi-layer ink layer can well protect the reflection film layer, the outer surface of the film is light-tight, the reflection effect of the reflection film layer is improved, and the visual effect of a user is improved.

Optionally, baking each printed ink layer at 75-85 °; the baking time is 25-35 min. The drying effect of the ink layer is better, the uniformity and the stability of the thickness of the ink layer are convenient to maintain, and the texture pattern layer is protected better.

Step 106: and carrying out CNC cutting on the sheet to obtain the membrane.

Specifically, the sheet is subjected to numerical control cutting to obtain the membrane. The cutting process uses a computer numerical control machine tool, and the computer numerical control machine tool is an automatic machine tool provided with a program control system. The control system can logically process a program defined by a control code or other symbolic command, decode the program, and operate a machine tool to process a sheet. The diaphragm formed by CNC cutting has the advantages of high cutting efficiency, more accurate size and convenience in assembly on electronic equipment.

Optionally, the material used for transfer printing is UV glue, and the UV glue is cured by light irradiation with the light irradiation energy of 800mj to 1100 mj.

During the transfer, the texture pattern formed by the UV paste is cured by ultraviolet irradiation, and the texture pattern on the sub-mold 4 and the texture pattern on the sheet are rapidly cured by ultraviolet irradiation. The illumination energy is 800mj-1100mj, so that the texture pattern can be quickly cured, and the cured texture pattern can be ensured to have better stability and strength.

The embodiment of the application provides a shell, which comprises a light-transmitting substrate and a diaphragm, wherein the diaphragm is prepared by the preparation method of the diaphragm; the side face, far away from the ink layer, of the diaphragm is attached to the light-transmitting substrate.

Through forming the casing with the diaphragm laminating on the printing opacity base plate, specific ID effect demand can be realized to this casing, can let thin diaphragm and casing have the vision of bore hole 3D's degree of depth of field, strengthens the mysterious sense and the value sense of product.

Embodiments of the present application provide an electronic device, which includes but is not limited to a mobile phone, a tablet computer, an electronic reader, a smart watch, and the like. The electronic equipment comprises the shell.

Through making the casing have the vision of better depth of field, optimized electronic equipment's outward appearance, strengthened electronic equipment's valuable sense for user's visual effect is better.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The manufacturing method of the diaphragm is characterized by comprising the following steps:

processing a metal plate according to the diaphragm section curve model to obtain a female die, wherein the metal plate is a nickel-plated steel plate, the thickness of a nickel layer on the steel plate is 50-100 mu m, and the metal plate is processed on the nickel layer;

and carrying out CNC cutting on the sheet to obtain the membrane.

2. The method of claim 1, wherein a daughter mold is formed by transferring the master mold to a PC board.

3. The method for manufacturing a film according to claim 2, wherein the material used for the transfer printing is a UV paste, the UV paste is cured by light irradiation, and the light irradiation energy is 800mj to 1100 mj.

4. The method of claim 1, wherein the cut width of the curve is 10 μm to 50 μm.

5. The method of claim 1, wherein plating a reflective film layer on the pattern layer comprises:

heating the metal target material under the vacuum condition;

and depositing the particles of the metal target on the pattern layer to form the reflecting film layer.

6. The method of claim 5, wherein the metal target is heated at a temperature of 60 ° to 70 °.

7. The method for manufacturing a membrane according to claim 5, wherein the reflection film layer has a titanium oxide layer and a silicon oxide layer, and the silicon oxide layer is located between the two titanium oxide layers.

8. The method of claim 1, wherein a plurality of ink layers are printed on the reflective film layer, each ink layer having a thickness of 7 μm to 9 μm.

9. The method of claim 8, wherein each printed ink layer is baked at a temperature of 75 ° to 85 °; the baking time is 25-35 min.

10. A housing, comprising:

a light-transmitting substrate;

a membrane sheet produced by the method of producing a membrane sheet according to any one of claims 1 to 9;

11. An electronic device characterized by comprising the housing of claim 10.