CN110724292A

CN110724292A - Shell, electronic device and manufacturing method of shell

Info

Publication number: CN110724292A
Application number: CN201810778539.8A
Authority: CN
Inventors: 李�杰
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-07-16
Filing date: 2018-07-16
Publication date: 2020-01-24
Anticipated expiration: 2038-07-16
Also published as: WO2020015463A1; CN110724292B

Abstract

The application relates to a manufacturing method of a shell, which comprises the following steps: step a, carrying out optical coating on the inner surface of a shell to form an optical coating layer; b, spraying a coating containing bead powder on the inner surface of the optical coating layer to form a color gradient layer; and c, spraying black slurry on the inner surface of the color gradient layer to form a black bottom color layer. According to the manufacturing method of the shell, through optical coating, gradient spraying of the bead powder and spraying of the black paste, the permeability of the shell is high, the surface brightness is high, the bead powder is particles and has colors, light with corresponding colors can be reflected, the most saturated reflective color effect can be presented when the black matrix is covered, the granular sensation of a color transition area can be effectively reduced, the color area is more flexible, and the color effect which can be changed along with different light rays is brought.

Description

Shell, electronic device and manufacturing method of shell

Technical Field

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

Background

At present, the surface brightness of the plastic mobile phone shell is not high, the appearance is not attractive enough, and a transparent appearance effect is difficult to manufacture.

Disclosure of Invention

The first aspect of the application provides a method for manufacturing a housing, so as to solve the technical problems of low surface brightness, unattractive appearance and low permeability of a plastic housing.

The manufacturing method of the shell is characterized by comprising the following steps:

step a, carrying out optical coating on the inner surface of a shell plate to form an optical coating layer;

b, spraying a coating containing bead powder on the inner surface of the optical coating layer to form a color gradient layer;

and c, spraying black slurry on the inner surface of the color gradient layer to form a black bottom color layer.

According to the manufacturing method of the shell, through optical coating, gradient spraying of the bead powder and spraying of the black paste, the permeability of the shell is high, the surface brightness is high, the bead powder is particles and has colors, light with corresponding colors can be reflected, the most saturated reflective color effect can be presented when the black matrix is covered, the granular sensation of a color transition area can be effectively reduced, the color area is more flexible, and the color effect which can be changed along with different light rays is brought.

In one embodiment, the color gradient layer comprises a first sprayed layer, and the paint adopted by the first sprayed layer comprises aluminum silver powder and mica bead powder.

In one embodiment, the method comprises the following steps:

the particle size range of the aluminum silver powder is 30-100 mu m, and the weight content of the aluminum silver powder in the coating of the first spraying layer is 0.005-0.05%;

the particle size range of the mica bead powder is 5-25 mu m, and the weight content of the mica bead powder in the coating of the first spraying layer is 0.001-0.01%.

In one embodiment, the first sprayed layer is gradually changed from dense to sparse by changing the density of the sprayed coating, so that the color is gradually changed from the existence to the nonexistence.

In one embodiment, the color-graded layer includes a second sprayed layer formed by densely spraying on the first sprayed layer, and the coating material of the second sprayed layer includes mica bead powder.

In one embodiment, the mica bead powder in the coating of the second spraying layer has a particle size of 5-25 μm and a weight content of 3-4%.

In one embodiment, the method further includes, between the step a and the step b: and coating gloss oil on the optical coating layer to form a gloss oil layer.

In one embodiment, the optical coating layer is a monochromatic film layer.

In one embodiment, the shell plate is made of a high polymer material, and the light transmittance of the shell plate is not less than 75%.

In one embodiment, the shell plate is a 2.5D or 3D polymer plate.

In a second aspect of the present application, a housing is provided.

A shell comprises a shell plate, wherein an optical coating layer, a color gradient layer and a black bottom color layer are sequentially arranged on the inner surface of the shell plate.

In one embodiment, a gloss oil layer is arranged between the optical coating layer and the color gradient layer.

In one embodiment, the color gradient layer comprises a first sprayed layer and a second sprayed layer which are attached to each other, and the second sprayed layer is positioned between the first sprayed layer and the black ground layer.

In one embodiment, the first sprayed layer comprises aluminum silver powder and mica bead powder, and the first sprayed layer forms a gradual effect of color change from the presence to the absence through the gradual change of the density of the paint from dense to sparse.

In one embodiment, the method comprises the following steps:

In one embodiment, the second sprayed layer is formed by intensive spraying on the first sprayed layer, and the second sprayed layer comprises mica bead powder, wherein the particle size of the mica bead powder is 5-25 μm, and the weight content of the mica bead powder is 3-4%.

In one embodiment, the shell plate is a 2.5D or 3D polymer material plate, and the light transmittance of the shell plate is not less than 75%.

In a third aspect of the present application, an electronic device is provided.

An electronic device includes the housing.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a three-dimensional schematic diagram of an electronic device according to an embodiment;

FIG. 2 is an exploded view of the housing of the electronic device of FIG. 1;

FIG. 3 is a flow chart illustrating fabrication of the housing shown in FIG. 2 according to one embodiment;

fig. 4 is a flow chart of manufacturing the housing shown in fig. 2 according to another embodiment.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

As used herein, "terminal device" refers to a device capable of receiving and/or transmitting communication signals including, but not limited to, devices connected via any one or more of the following connections:

(1) via wireline connections, such as via Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), Digital cable, direct cable connections;

(2) via a Wireless interface means such as a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter.

A terminal device arranged to communicate over a wireless interface may be referred to as a "mobile terminal". Examples of mobile terminals include, but are not limited to, the following electronic devices:

(1) satellite or cellular telephones;

(2) personal Communications Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data Communications capabilities;

(3) radiotelephones, pagers, internet/intranet access, Web browsers, notebooks, calendars, Personal Digital Assistants (PDAs) equipped with Global Positioning System (GPS) receivers;

(4) conventional laptop and/or palmtop receivers;

(5) conventional laptop and/or palmtop radiotelephone transceivers, and the like.

Referring to fig. 1 and 2, in an embodiment, the electronic device 10 is a mobile phone, and the electronic device 10 includes a housing 100, where the housing 100 may be a battery cover or a display. The shell 100 comprises a shell plate 110, the shell plate 110 is made of a transparent polymer material, and the inner surface of the shell plate 110 is subjected to surface treatment to improve the brightness and permeability of the shell 100 so as to make the brightness and permeability similar to that of glass. The inner surface of the casing sheet 110 may be understood as a surface of the casing sheet 110 facing the inside of the electronic device 10, and the surface opposite to the inner surface of the casing sheet 110 is an outer surface of the casing sheet 110 and is also an outer surface of the casing 100. The surface treatment makes the color of the shell 100 gradually change, has the starry sky effect of starry points, is more beautiful, and has higher appearance expressive force.

As shown in fig. 1 and 2, in one embodiment, an optical coating layer 120, a varnish layer 130, a color gradient layer and a black ground color layer 160 are sequentially disposed on the inner surface of the housing plate 110. The shell plate 110 is a 2.5D or 3D plate and is made of a transparent high polymer material, and the thickness of the shell plate is 0.6-0.8 mm. The light transmittance of the shell plate 110 is greater than or equal to 75%, and the transparent effect is achieved. In one embodiment, the housing plate may be a plastic plate. Because of the limitation of various technologies, the housing 100 with stable and reliable mass production in the market is usually made of metal, glass or polymer material. Although the metal casing 100 has a good metal texture, the weight of the casing is heavy, which may increase the weight of the electronic device 10 during use and cause inconvenience to users. Therefore, the conventional casing 100 is developed in a direction of light weight and small thickness. The glass outer case 100 is transparent and has high surface brightness, but has high production cost and is easy to fall and break, and is not acceptable in the design of low-end products. The application develops beautiful and unique surface effects on the surface of the shell 100 made of high polymer materials, and makes beautiful effects on the shell of a low-end model under the condition of not increasing the cost.

In one embodiment, as shown in fig. 2, the optical coating layer 120 is a monochromatic film layer on the inner surface of the housing plate 110, i.e. the color of the optical coating layer 120 is monochromatic. The permeability of the polymer material is lower than that of glass, so that the housing 100 looks less transparent and is difficult to make an ideal sense of value. In addition, the usual process is generally to apply a plurality of layers of different processes, for example, a UV texture transfer layer superimposed with a plating, spraying or screen printing layer. However, the problem of bonding force between layers is very easily generated by the mutual overlapping of the multilayer films, and as long as the bonding force of one layer is not too high, all the coatings which are overlapped later are easy to fall off, so that the effect cannot be realized. The optical coating layer 120 is formed on the inner surface of the shell plate 110 by using a monochromatic optical coating, rather than simply spraying the inner surface of the shell plate 110 with a solid color. The optical coating layer 120 shows the color of the shell plate 110 through the reflection of the corresponding color, and compared with the common silk-screen printing and spraying real color, the optical coating layer 120 enables the shell plate 110 to be more flexible and vivid, and changes along with the change of light, and is not stiff and rigid. The optical coating layer 120 improves the brightness and the transparency of the shell plate 110, so that the brightness and the transparency are almost similar to those of glass, and the overall value feeling is improved.

In one embodiment, the gloss oil layer 130 is located between the optical coating layer 120 and the color gradient layer, as shown in fig. 2. Gloss oil, a synthetic resin, is now commonly referred to as a surface clear varnish, made with binders and auxiliaries, and the like, without any pigment, and after film formation the oil is glossy. The gloss oil layer 130 can increase the bonding force between the optical coating layer 120 and the color gradient layer, and prevent the color gradient layer from falling off from the optical coating layer 120.

In one embodiment, the color gradient layer is located between the varnish layer 130 and the black ground layer 160. The color gradient layer is sprayed in a gradient manner from very dense to sparse by adopting a coating containing bead powder, and the bead powder comprises aluminum silver powder and mica bead powder. The gradual spraying from dense to sparse disappearance can be understood as that the surface density of the color particles, namely the bead powder, is from large to small to zero, namely that the number of the color particles on a unit area is from large to small to zero. The bead powder is particles, has color capable of reflecting light with corresponding color, and can present the most saturated reflective color effect when being covered with black matrix. The granular sensation of the transition region can be effectively reduced, the region with the color can be more flexible, and the color change effect can be generated along with the difference of light.

As shown in fig. 2, in one embodiment, the color gradient layer includes a first sprayed layer 140 and a second sprayed layer 150. The first sprayed layer 140 is located between the varnish layer 130 and the second sprayed layer 150. The coating used for the first spraying layer 140 comprises two kinds of bead powder, wherein one kind of bead powder is aluminum silver powder, the particle size is larger, the particle size range is 30-100 mu m, and the weight content in the whole coating formula is 0.005-0.05%, preferably 0.01%. The particle size is in the range of 30 to 100 μm, and it is understood that the particle size of each aluminum silver powder is in the range of 30 to 100 μm without considering impurities, the particle sizes of different aluminum silver powders may be the same or different, and it is not necessary that aluminum silver powders having particle sizes of 30 μm and 100 μm are present. The other bead powder is mica bead powder, the particle size ranges from 5 to 25 mu m, and the weight content in the whole coating formula is 0.001 to 0.01 percent, preferably 0.005 percent. The particle size ranges from 5 to 25 μm, it is understood that the particle size of each mica bead powder ranges from 5 to 25 μm without considering impurities, the particle sizes of different mica bead powders may be the same or different, and the mica bead powders having particle sizes of 5 μm and 25 μm are not necessarily present. The coating containing two kinds of bead powder is adopted, and the gradient spraying from dense to sparse to disappearance is carried out by changing the density of the sprayed coating, so that the starlight effect of the starlight points with fantastic color and light reflection is generated.

The second sprayed layer 150 is located between the first sprayed layer 140 and the black ground layer 160. The paint of the second sprayed coating 150 comprises colored fine-grained mica bead powder, the grain diameter ranges from 5 to 25 μm, and the weight content in the whole paint formula is between 3 and 4 percent, and is preferably 3.5 percent. The mica bead powder can be fully developed by adopting a dense spraying mode. The particle diameter is in the range of 5 to 25 μm, it being understood that the particle size of each mica bead powder is in the range of 5 to 25 μm, the particle sizes of the different mica bead powders may be the same or different, and the presence of mica bead powders having particle sizes of 5 μm and 25 μm is not essential, without taking into account impurities.

In one embodiment, as shown in fig. 2, the black matrix layer 160 is located on the second sprayed layer 150. Through the optical coating, pure black paste is sprayed after the color gradient layer to form the black background layer 160. The black background layer 160 serves as a cover bottom, so that the reflective color of the optical coating layer 120 and the reflective color of the color gradient layer can achieve the most saturated effect, and the shell 100 has a starry-and-starry-dot starry-sky effect.

As shown in fig. 2, in an embodiment, the housing 100 includes a housing plate 110, and an inner surface of the housing plate 110 is sequentially provided with an optical coating layer 120, a varnish layer 130, a first spray coating layer 140, a second spray coating layer 150, and a black ground color layer 160. The shell plate 110 is a 2.5D or 3D polymer material plate, and the light transmittance is greater than 75%. The optical coating 120 makes the shell plate 110 more flexible and vivid, changing with different light rays, and not stiff and stiff. The optical coating layer 120 improves the brightness and the transparency of the shell plate 110, so that the brightness and the transparency are almost similar to those of glass, and the overall value feeling is improved. The gloss oil layer 130 can increase the bonding force between the optical coating layer 120 and the color gradient layer, and prevent the color gradient layer from falling off from the optical coating layer 120. The first spray coating layer 140 contains aluminum silver powder and mica bead powder, and the density of the sprayed coating is changed to gradually spray the coating from dense to sparse until the coating disappears, so that a starlight effect with colorful and reflective starlike dots is generated. The second spraying layer 150 comprises colored mica bead powder, and the mica bead powder can be fully colored by adopting a dense spraying mode. The black background layer 160 serves as a cover bottom, so that the reflective color of the optical coating layer 120 and the reflective color of the color gradient layer can achieve the most saturated effect, and the shell 100 has a starry-and-starry-dot starry-sky effect.

In one embodiment, as shown in fig. 3, a method for manufacturing a housing includes the following steps:

step a, performing optical coating on the inner surface of a shell plate 110 to form an optical coating layer 120;

b, spraying a coating containing bead powder on the inner surface of the optical coating layer 120 to form a color gradient layer;

In one embodiment, the single solid-colored optical coating layer 120 is formed by optically coating on the inner surface of the housing plate 110 in step a. The optical coating layer 120 shows the color of the shell plate 110 through the reflection of the corresponding color, and compared with the common silk-screen printing and spraying real color, the optical coating layer 120 enables the shell plate 110 to be more flexible and vivid, and changes along with the change of light, and is not stiff and rigid. The optical coating layer 120 improves the brightness and the transparency of the shell plate 110, so that the brightness and the transparency are almost similar to those of glass, and the overall value feeling is improved.

As shown in fig. 4, in an embodiment, between the step a and the step b, the method further includes: and coating gloss oil on the inner surface of the optical coating layer 120 to form a gloss oil layer 130. The gloss oil layer 130 can increase the bonding force between the optical coating layer 120 and the color gradient layer, and prevent the color gradient layer from falling off from the optical coating layer 120.

In one embodiment, as shown in fig. 4, in step b, a color gradient layer is formed by spraying a coating containing beads on the inner surface of the varnish layer 130. The spraying process in the step b comprises a first spraying and a second spraying. The first spraying forms a first sprayed layer 140 and the second spraying forms a second sprayed layer 150. The bead powder comprises aluminum silver powder and mica bead powder.

The paint adopted by the first spraying comprises aluminum silver powder and mica bead powder. The aluminum silver powder has larger particles, the particle size range is 30-100 mu m, and the weight content in the whole coating is 0.005-0.05%, preferably 0.01%; the particle size range of the mica bead powder is between 5 and 25 mu m, and the weight content of the mica bead powder in the whole coating is between 0.001 and 0.01 percent, preferably 0.005 percent. The first spraying adopts the coating containing the aluminum silver powder and the mica bead powder to carry out gradual change spraying from dense to sparse to disappearance, so as to form a gradual change effect from existence to nonexistence of colors and generate a starlight effect of starry points with fantasy color reflection.

The first spraying is followed by a second spraying on the first sprayed layer 140. The paint adopted by the second spraying comprises colored fine-particle mica bead powder, the particle diameter ranges from 5 to 25 mu m, and the weight content in the whole paint formula is between 3 and 4 percent, preferably 3.5 percent. The second spraying adopts a dense spraying mode to ensure that the mica bead powder can fully develop color.

In one embodiment, the black matrix layer 160 is formed by optically plating, and spraying pure black paste after the color gradient layer. The black background layer 160 serves as a cover bottom, so that the reflective color of the optical coating layer 120 and the reflective color of the color gradient layer can achieve the most saturated effect, and the shell 100 has a starry-and-starry-dot starry-sky effect.

The usual production is generally a multilayer application by different processes, for example a UV-texture transfer layer superimposed with a galvanic, spray or silk-screen layer. The problem of bonding force between layers is easily caused by the mutual overlapping of the multilayer films, and all coatings overlapped later can easily fall off as long as the bonding force of one layer is not too high, so that the effect cannot be realized. The application uses two processes of optical coating and bead powder gradient spraying, reduces the number of used processes, namely, reduces the number of the bonding force problems; the spraying process is relatively simple, easy to realize and low in cost; the effect of casing 100 is fresh, and high bright, high, the high reflection of light degree that optical coating brought has still promoted casing 100's valuable sense.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

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

2. The method for manufacturing the shell according to claim 1, wherein the color-changing layer comprises a first sprayed layer, and the paint used for the first sprayed layer comprises aluminum silver powder and mica bead powder.

3. The method of making a housing of claim 2, comprising:

4. The method of manufacturing a housing according to claim 2, wherein the first sprayed layer is gradually changed from dense to sparse by changing the density of the sprayed paint, thereby forming a gradual change effect of the color from the existence to the nonexistence.

5. The method of manufacturing a casing according to claim 2, wherein the color-graded layer includes a second sprayed layer formed by densely spraying on the first sprayed layer, and the paint of the second sprayed layer includes mica bead powder.

6. The method for manufacturing the shell according to claim 5, wherein the mica bead powder in the coating of the second spray coating has a particle size of 5-25 μm and a weight content of 3-4%.

7. The method for manufacturing the shell according to claim 1, further comprising, between the step a and the step b: and coating gloss oil on the optical coating layer to form a gloss oil layer.

8. The method of claim 1, wherein the optical coating is a single color coating.

9. The method for manufacturing the shell according to claim 1, wherein the shell plate is made of a polymer material, and the light transmittance of the shell plate is not less than 75%.

10. The method for manufacturing the shell according to claim 1, wherein the shell plate is a 2.5D or 3D polymer material plate.

11. The shell is characterized by comprising a shell plate, wherein an optical coating layer, a color gradient layer and a black background layer are sequentially arranged on the inner surface of the shell plate.

12. The housing of claim 11 wherein a varnish layer is disposed between the optically coated layer and the color graded layer.

13. The housing of claim 11, wherein the color gradient layer comprises a first sprayed layer and a second sprayed layer attached to each other, the second sprayed layer being between the first sprayed layer and the black background layer.

14. The casing according to claim 13, wherein the first sprayed layer comprises aluminum silver powder and mica bead powder, and the first sprayed layer forms a gradual effect of color from the presence to the absence by gradual change of the density of the paint from dense to sparse.

15. The housing of claim 14, comprising:

16. The casing according to claim 13, wherein the second sprayed layer is formed by densely spraying the first sprayed layer, and the second sprayed layer includes mica beads having a particle size ranging from 5 to 25 μm in an amount of 3 to 4% by weight.

17. The housing of claim 11, wherein the housing sheet is a 2.5D or 3D polymer sheet, and the light transmittance of the housing sheet is not less than 75%.

18. An electronic device, characterized in that it comprises a housing according to any one of claims 11-17.