CN109017102B

CN109017102B - Shell surface treatment process, shell and mobile terminal

Info

Publication number: CN109017102B
Application number: CN201811065234.9A
Authority: CN
Inventors: 柯柏龙; 林四亮
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-09-12
Filing date: 2018-09-12
Publication date: 2021-03-23
Anticipated expiration: 2038-09-12
Also published as: CN109017102A

Abstract

The invention discloses a shell surface treatment process, a shell and a mobile terminal, wherein the shell is provided with a length direction and a width direction, and the surface treatment process comprises the following steps: providing a transfer printing mold with target textures, wherein the target textures comprise a plurality of arc-shaped grooves, and non-zero included angles are formed among the arrangement direction of the arc-shaped grooves, the length direction and the width direction; transferring the target texture onto a surface of the housing; forming a reflective film on the surface; and forming a light shielding layer on the reflective film. The shell processed by the shell surface treatment process has better appearance texture.

Description

Shell surface treatment process, shell and mobile terminal

Technical Field

The invention relates to the technical field of product surface treatment, in particular to a shell surface treatment process, a shell and a mobile terminal.

Background

With the increasing change of 3C products, the product competition of each brand is more and more intense. However, products of different brands are different in structure and style, so that the difference of product appearance and fashion attribute become one of the decisive factors of product transaction rate.

The shell of the traditional 3C product has the problem of single grain, so that the appearance texture of the shell is poor, and the higher and higher aesthetic requirements of users cannot be met.

Disclosure of Invention

The invention discloses a shell surface treatment process, a shell and a mobile terminal, and aims to solve the problem of poor appearance texture of the shell.

In order to solve the problems, the invention adopts the following technical scheme:

a process for surface treatment of a housing, said housing having a length direction and a width direction, comprising the steps of:

providing a transfer printing mold with target textures, wherein the target textures comprise a plurality of arc-shaped grooves, and non-zero included angles are formed among the arrangement direction of the arc-shaped grooves, the length direction and the width direction;

transferring the target texture onto a surface of the housing;

forming a reflective film on the surface;

and forming a light shielding layer on the reflective film.

The shell is processed by adopting the shell surface treatment process.

A mobile terminal comprises the shell.

The technical scheme adopted by the invention can achieve the following beneficial effects:

in the shell surface treatment process disclosed by the invention, the target texture of the transfer printing mold comprises a plurality of arc-shaped grooves, non-zero included angles are formed among the arrangement direction of the arc-shaped grooves and the length direction and the width direction of the shell, and after the texture transfer printing, the forming reflective film and the forming light shading layer are carried out, the shell generates dynamic gloss which flows in a winding manner under the action of light irradiation, and the presented gloss is more varied. Therefore, the shell processed by the shell surface treatment process has better appearance texture.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic flow chart of a shell surface treatment process disclosed in an embodiment of the invention;

FIG. 2 is a schematic structural diagram of a housing according to an embodiment of the disclosure;

FIG. 3 is a schematic view of a part of a process for treating the surface of a housing according to another embodiment of the present invention;

fig. 4 is a schematic partial flow chart of a shell surface treatment process according to still another embodiment of the disclosure.

Description of reference numerals:

100-shell, 110-arc structure, 11 l-first arc segment, 112-second arc segment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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 invention.

The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

As shown in fig. 1 and 2, the embodiment of the invention discloses a surface treatment process for a housing, wherein the housing 100 can be applied to a 3C product such as a mobile terminal, and has a length direction X and a width direction Y. The shell surface treatment process disclosed by the embodiment of the invention specifically comprises the following steps:

and S101, providing a transfer printing mold with the target texture.

The target texture can be previously manufactured on a transfer printing mold, and when the surface of the shell needs to be treated, the transfer printing mold can be directly used. As shown in fig. 2, the target texture may include a plurality of curved grooves, where curved grooves refer to grooves having a through axis that is curved and the through axis refers to an axis that runs in the through direction of the grooves. Many arc recesses can evenly be arranged, all form nonzero contained angle between its direction of arranging and the length direction X and the width direction Y of casing 100. It should be noted that the longitudinal direction X and the width direction Y of the housing 100 may correspond to the transfer mold to obtain the aforementioned angular relationship. After adopting this kind of design, the direction of arranging of many arc recesses neither is parallel to length direction X, also is not parallel to width direction Y. In a specific embodiment, the arrangement direction refers to an array direction of the plurality of arc-shaped grooves.

The above target texture may be formed on the transfer mold by a photolithography process (specifically, photolithography may be performed using a photoresist).

And S102, transferring the target texture to the surface of the shell 100.

The transfer operation may be performed by cutting. Specifically, a single explosion-proof membrane sheet may be slit into a plurality (e.g., 2, 3, 4, 6, etc.) of small sheets, which serve as a raw material for surface treatment of the individual housings 100. The explosion-proof membrane material can comprise a PET (Polyethylene terephthalate) base layer and an OCA (optically Clear adhesive) glue layer which are arranged in a stacked mode, the thickness of the PET base layer can be set to be 50 micrometers, and the thickness of the OCA glue layer can be set to be 25 micrometers.

After the transfer operation, the target texture on the transfer mold is correspondingly transferred to the surface of the housing 100, which may be the inner surface of the housing 100. Specifically, the target texture in the embodiment of the present invention is a groove structure, and the structure transferred to the surface of the housing 100 is a convex arc structure 110.

And S103, forming a reflecting film on the surface.

After the target texture is transferred to the surface of the housing 100, a reflective film is continuously formed on the surface, and the reflective film can reflect light, so that the user can clearly see the target texture and the gloss of the target texture. In an alternative embodiment, the reflective film may be formed by vacuum deposition.

And S104, forming a light shielding layer on the reflecting film.

The light shielding layer formed in this step may protect the housing from light, and may be formed by printing.

And S105, cutting the shell into a structure with a target shape.

After the light shielding layer is formed on the surface of the shell, cutting operation can be further performed according to the structural requirements of the product, for example, the edge of the shell is cut, so that the radian of the edge meets the requirements; for another example, a hole may be cut in the housing, and the hole may avoid devices such as a camera and a sensor of the mobile terminal.

When the above steps are performed, in order to ensure the processing precision, the processing environment can be kept at a certain cleanliness, such as thousand-level cleanliness.

As can be seen from the above, in the shell surface treatment process disclosed in the embodiment of the present invention, the target texture of the transfer mold includes a plurality of arc-shaped grooves, and the arrangement direction of the plurality of arc-shaped grooves and the length direction X and the width direction Y of the shell 100 all form a non-zero included angle, after the texture transfer, the forming of the reflective film and the forming of the light shielding layer, the shell 100 generates a meandering dynamic gloss under the light irradiation, and the gloss presented by the shell is changed more abundantly. It can be seen that the housing 100 processed by the housing surface treatment process has a better appearance texture.

In a further embodiment, an included angle formed between the arrangement direction of the plurality of arc-shaped grooves and the width direction Y of the housing 100 may be set to be 30 ° to 60 °. Specifically, the plurality of arc-shaped grooves may be arranged in sequence in a direction of 30 ° to 60 ° from the lower left corner of the housing 100 as a starting point, or may be arranged in sequence in a direction of 30 ° to 60 ° from the lower right corner of the housing 100 as a starting point. Under the irradiation of light, the light sensation generated by the housing 100 can be emitted from an origin (e.g. the lower left corner of the housing 100), and the multi-beam main light sensation shows different light sensation level changes with the angle of the housing 100 and the light source, thereby forming a silk light sensation of meandering flow. Especially in the case of a spotlight, the surface of the housing 100 may even produce a fine and graceful highlight band, which provides a more prominent feeling of motion. Therefore, when the target texture is designed in this way, the shell 100 can bring a new fashion feeling to the user, and the appearance texture of the shell 100 can better meet the requirements of the user.

In order to further improve the appearance texture of the shell, the at least one arc-shaped groove comprises a first arc-shaped groove section and a second arc-shaped groove section which are connected, and the bending directions of the first arc-shaped groove section and the second arc-shaped groove section are opposite. That is, the first circular arc groove section and the second circular arc groove section form a wave-shaped structure. Correspondingly, as shown in fig. 2, the arc structure 110 formed on the surface of the casing 100 includes a first arc segment 111 and a second arc segment 112 connected to each other, and the first arc segment and the second arc segment are bent in opposite directions. The arrangement makes the bending degree of the single arc structure 110 larger, and the meandering effect generated by the arc structure 110 is more obvious under the action of light irradiation, thereby achieving the aforementioned purpose.

It should be noted that the number of the arc-shaped grooves may be more than one, for example, hundreds of the arc-shaped grooves, and as the number of the arc-shaped grooves increases, the light sensation presented by the housing 100 will be more delicate, and certainly, the processing cost of the housing 100 will also increase. Therefore, in order to control the processing cost of the housing 100 while optimizing the appearance quality of the housing 100, the number of the arc-shaped grooves may be set reasonably. Of all the arc-shaped grooves, at least half of the arc-shaped grooves including the first arc-shaped groove section and the second arc-shaped groove section may be provided, and the arc structures 110 corresponding to the arc-shaped grooves are distributed approximately in the middle of the housing 100.

In order to further optimize the appearance texture of the casing 100, the at least one arc-shaped groove comprises a plurality of first arc-shaped groove sections and a plurality of second arc-shaped groove sections, and the plurality of first arc-shaped groove sections and the plurality of second arc-shaped groove sections are alternately connected. As shown in fig. 2, the arc structure 110 formed on the surface of the casing 100 includes a plurality of first arc segments 111 and second arc segments 112 alternately connected.

The curvatures of the first circular arc groove section and the second circular arc groove section can be equal or unequal. When the former structure is adopted, on one hand, the target texture can be simplified, so that the manufacturing cost of the transfer printing mold is reduced; on the other hand, the structure of the target texture can be more regular, and the light sensation effect finally presented by the housing 100 can be more beautiful. Therefore, the curvature of the first circular-arc groove segment and the curvature of the second circular-arc groove segment are preferably equal in the embodiment of the present invention.

In a preferred embodiment, the cross section of the arc-shaped groove is in a V shape, which is convenient for manufacturing the transfer printing mold, and can achieve a more ideal light reflection state to present a more expressive appearance texture. In addition, the width of the arc-shaped groove can be selected to be 10-50 μm, preferably 40 μm, and the width is the distance between two edges of the top of the V-shaped arc-shaped groove. Further, the distance between two adjacent arc-shaped grooves can be selected to be 20-70 μm, preferably 60 μm, and the distance specifically refers to the distance between the groove bottoms of two adjacent arc-shaped grooves. By the arrangement, the density of the arc-shaped grooves is guaranteed to meet the appearance texture requirement of the shell 100, and the cost burden caused by the excessive number of the arc-shaped grooves can be relieved.

In addition, when designing the structure of the target texture, the plurality of arc-shaped grooves can be used as a whole to perform the translation design and the rotation design of the target texture, and after the target texture is transferred to the shell 100, the light sensation generated by the shell 100 will be changed, and even the light sensation with a plurality of light shadows staggered can be generated. Therefore, the target texture can be flexibly adjusted according to different appearance requirements, and more diversified appearance effects can be obtained. Of course, the structure of a part of the arc-shaped groove can be independently adjusted, so that the light sensation of the housing 100 is more varied.

In an alternative embodiment, the transfer of the target texture may be achieved by a UV transfer process. The UV transfer printing process, also known as UV filling process or UV coating process, transfers the texture to the plate by using the non-stick characteristic of UV glue and metal, thereby achieving the effects of CD texture, hard wire drawing, matte texture, bright surface texture and the like. Specifically, as shown in fig. 3, the foregoing step S102 includes:

and S111, dripping UV glue into the transfer printing mold.

The transfer mold may be fixed in advance in position to the UV transfer machine.

And S112, placing the shell 100 into a transfer printing mold, and attaching the shell 100 to the UV glue.

Specifically, the shell 100 can be rolled by using a rubber roller, so that the shell 100 is tightly pressed on the UV glue, the fitting degree of the shell and the UV glue is ensured, and the texture transfer effect is improved.

S113, irradiating the shell 100 and the UV glue until the UV glue is solidified.

Specifically, the transfer mold carrying the housing 100 and the UV glue may be placed in a photo-curing machine, and the UV glue may be cured by light (specifically, ultraviolet light) irradiation, so as to achieve the purpose of transferring the texture. After the UV glue is solidified, the case 100 may be separated from the transfer mold.

After the target texture in the transfer mold is transferred to the surface of the housing 100, a protective film may be coated on the target texture of the housing 100, thereby facilitating the turnover of the housing 100.

In an alternative embodiment, a reflective film may be formed on the surface of the housing 100 by optical coating. Specifically, the step 103 may include: and (3) putting the shell 100 into an optical coating device for coating, and taking out the shell 100 with the reflecting film formed on the surface after 50-60 min. When the coating operation is performed, the coating parameters can be adjusted, and the optical coating device can emit light, so that the raw material forming the reflective film is converted into a gaseous state under the irradiation effect of the light, and then is attached to the surface of the shell 100 with the target texture and finally deposited on the surface to obtain the required reflective film. In a specific embodiment, the raw material of the coating film can be silicon oxide and titanium oxide, and a blue-biased reflecting film is formed, the wavelength of blue light is 436nm to 495nm, and the reflecting film can reflect the blue light in the wavelength range. Further, the reflective film may have a three-layer structure in which the first layer and the third layer are titanium oxide and the second layer is silicon oxide.

Of course, the reflective film is only an example, and other reflective films, such as a metallic film of a reddish phase, a metallic film of a greenish phase, and the like, may be disposed according to practical situations when implementing the embodiment of the present invention, which is not limited in this respect. In addition, besides the above reflective films, those skilled in the art may also use other reflective films according to actual needs, and the embodiment of the present invention is not limited thereto.

If the target texture of the case 100 is covered with the protective film, the reflective film is formed on the target texture of the case 100 after the protective film is removed. In addition, after the reflective film is formed on the target texture of the case 100, a protective film may be coated on the reflective film of the case 100, facilitating the turnover.

In an alternative embodiment, the light shielding layer may be formed by screen printing. Specifically, as shown in fig. 4, step S104 may include:

and S121, printing ink with the target color on the reflecting film by adopting a silk screen.

The mesh size of the screen may be 3501pi and the ink used may typically be black.

S122, baking the shell 100 at the baking temperature of 30-50 ℃ for 40-50 min.

The ink-printed case 100 may be placed on a support stand, and then the support stand together with the case 100 may be placed in an oven for baking.

And S123, circulating the steps S121 to S122 by preset times.

That is, the printing ink and the baking operation are repeatedly performed on the housing 100, so that the thickness and the uniformity of the light shielding layer formed on the housing 100 can meet the requirements, and a better light shielding effect is achieved. Specifically, the preset number of times may be three times, and of course, may be less or more, and the embodiment of the present invention is not limited thereto.

If the reflective film of the case 100 is covered with a protective film, the protective film is removed, and then a light shielding layer is formed on the reflective film of the case 100. In addition, after the light shielding layer is formed on the reflective film of the case 100, a protective film may be coated on the light shielding layer of the case 100, which facilitates circulation.

As mentioned above, the housing 100 having the texture transferred, the reflective film formed, and the light shielding layer formed thereon may be cut to obtain the housing 100 having a desired shape. Optionally, in the embodiment of the present invention, the housing may be processed into a structure having a target shape by laser etching, and further, a CNC (Computerized Numerical Control) laser etching process may be adopted. The laser etching process can be implemented by a laser etching machine, and a high-intensity laser beam emitted by a laser can be focused at a focal point, so that the material at the focal point is oxidized and processed. The processing technology is more convenient to implement, different structures can be adapted by flexibly controlling processing parameters, and the precision of the processed structures is higher.

Based on the surface treatment process, the embodiment of the invention also discloses a shell 100, and the shell 100 can be processed by any one of the surface treatment processes.

Further, the embodiment of the present invention also discloses a mobile terminal, which includes the above-mentioned housing 100. The mobile terminal disclosed by the embodiment of the invention can be a smart phone, a notebook computer, a tablet computer, wearable equipment (such as a smart watch) and the like, and the embodiment of the invention does not limit the specific type of the mobile terminal.

In the above embodiments of the present invention, the difference between the embodiments is mainly described, and different optimization features between the embodiments can be combined to form a better embodiment as long as they are not contradictory, and further description is omitted here in view of brevity of the text.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A process for surface treatment of a housing, said housing having a length direction and a width direction, comprising the steps of:

providing a transfer printing mold with target textures, wherein the target textures comprise a plurality of arc-shaped grooves, and non-zero included angles are formed among the arrangement direction of the arc-shaped grooves, the length direction and the width direction; the at least one arc-shaped groove comprises a first arc-shaped groove section and a second arc-shaped groove section which are connected, and the bending directions of the first arc-shaped groove section and the second arc-shaped groove section are opposite;

transferring the target texture onto a surface of the housing;

forming a reflective film on the surface;

and forming a light shielding layer on the reflective film.

2. The casing surface treatment process according to claim 1, wherein an angle formed between the arrangement direction and the width direction is 30 ° to 60 °.

3. The casing surface treatment process of claim 1, wherein the curvatures of the first circular-arc groove segment and the second circular-arc groove segment are equal.

4. The casing surface treatment process of claim 1, wherein at least one of the arc-shaped grooves comprises a plurality of the first arc-shaped groove segments and a plurality of the second arc-shaped groove segments, and the plurality of the first arc-shaped groove segments and the plurality of the second arc-shaped groove segments are alternately connected.

5. The casing surface treatment process according to any one of claims 1 to 4, wherein the step of transferring the target texture onto the surface of the casing comprises:

dripping UV glue into the transfer printing mould;

putting the shell into the transfer printing mold, and attaching the shell to the UV glue;

and irradiating the shell and the UV glue until the UV glue is solidified.

6. The casing surface treatment process according to any one of claims 1 to 4, wherein the step of forming a reflective film on the surface comprises:

and (3) putting the shell into an optical coating device for coating, and taking out the shell with the reflecting film formed on the surface after 50-60 min.

7. The casing surface treatment process according to any one of claims 1 to 4, wherein the step of forming a light shielding layer on the reflective film comprises:

(1) printing ink with a target color on the reflecting film by adopting a silk screen printing plate;

(2) baking the shell at the baking temperature of 30-50 ℃ for 40-50 min;

(3) and (3) circulating the steps (1) to (2) by preset times.

8. A housing, characterized in that the housing is processed by the housing surface treatment process according to any one of claims 1 to 7.

9. A mobile terminal characterized by comprising the housing of claim 8.