KR102085253B1 - Manufacturing method for 3D cover structure - Google Patents

Abstract

The present invention relates to a method for manufacturing a 3D cover. According to the 3D cover manufacturing method, a back cover unit, a 3D side surface cover unit, and a connection unit formed in an inclined or round shape with an inward angle on the outer surface of an end part of the side surface cover unit are formed integrally. The present invention is particularly a decoration film insert type injection molding method which forms a cavity in a form corresponding to the 3D cover by using a formed 3D decoration film and facing first and second mold cores, wherein the outer wall of the cavity groove is prepared with a mold designed with a surface corresponding to the inward angle to manufacture a 3D cover. The present invention: significantly improves economical efficiency of the assembling and manufacturing of a device as a separately equipped frame is not required for the access and connection of a front cover and a back cover unit; and has an effect of enabling decoration with continuity from the back cover to the side surface cover unit and the connecting unit. The present invention has a special effect of improving usability such as improvement of a grip feeling of a side surface as the outer surface of an end part of a side surface cover unit is formed in an inclined shape or a round shape with a predetermined inward angle (θ), and protection from an external impact as a display window assembled is positioned inwards partially without being directly in contact with the outside.

Description

Manufacturing method for 3D cover {Manufacturing method for 3D cover structure}

The present invention relates to a 3D cover, and more particularly, to a manufacturing method of a 3D cover used as a so-called back-cover of a portable information communication device.

In general, portable information and communication devices such as smart phones and tablet PCs include liquid crystal displays provided as a display device, and various electronic components are built in. Therefore, when a device such as a device is dropped or damaged, it is easily damaged and broken. You won't be able to. As a result, protective and finishing panels are provided on the back of the device as so-called back-covers, which typically display various decorations such as specific logos, letters, symbols, patterns and colors.

In terms of form, so-called 3D panels are used as the back-covers in which the edges of the flat panel are curved to improve the three-dimensional and grip feeling of the device.

Referring to FIG. 1, a conventional smartphone 1 has a side metal frame 4 connecting the ends of the front back-cover 3 and the front front-cover 3 and both covers 2 and 3 in appearance. ) Here, the back-cover 2 is a 3D type cover, which is usually formed of glass or plastic (eg, PMMA-PC composite sheet) or injection molded plastic after inserting a film. ) And the front-cover (3) is firmly bonded and connected via the side frame (4). The front cover 3 is for example a display window of a smartphone.

Although the combined configuration of the conventional smartphone 1 generally applies the above-described method, it takes a lot of equipment and time to separate materials and processing to provide the frame 4, while the frame 4 There is a disadvantage in the process, such as having to assemble the back-cover (2) and the front-cover (3) by using a), these problems are a factor that increases the unit cost of the product as a whole.

In addition, there is a possibility that a defect occurs at the connection and bonding site using the frame (4).

On the other hand, since the frame 4 is manufactured and provided separately from the back-cover 2, for example, various colorful decorations such as UV patterns, gradient printing, and metal deposition on the back-cover 2 have continuity. Since it cannot be expressed up to 4), the surface utilization of the side of the device 1, that is, the frame 4, is inevitably limited.

<Preceding technical literature>

Patent Application Publication No. 10-1634285

Patent Application Publication No. 10-1528108

Patent Registration No. 10-1429085

Patent Registration No. 10-1929202

The present invention is proposed to solve the above problems of the prior art. An object of the present invention is to provide a variety of continuity from the back-cover to the side and the connection, while significantly improving the economics of assembling and manufacturing the device by integrally molding the back-cover including the side frame and the connecting portion of the end thereof. It is to provide a method of manufacturing a 3D cover that improves the surface usability, such as a colorful decoration is possible.

Another object of the present invention is to improve the grip of the side by forming the outer surface of the side end portion inclined or round inward at a predetermined angle, and at the same time the end of the display window assembled on the upper side is not directly in contact with the side portion It is to provide a manufacturing method of the 3D cover that can be protected from the impact of the external parts by being located inside.

In the present invention 'manufacturing method of 3D cover' the '3D cover',

A cover member comprising a plastic panel and a decoration formed outside or inside thereof;

A back-cover part covering the back of the device, a side-cover part bent to a height capable of covering the side of the device at the edge of the back-cover part, and an inclined angle having an inward angle at the outer surface of the end of the side-cover part; Or a round portion formed integrally with a connecting portion to which the front cover of the device is directly or indirectly connected;

It is.

The present invention is a method of manufacturing the 3D cover,

A cavity of a shape corresponding to the 3D cover is formed by using a 3D-shaped decoration film whose edge portion is formed in a height direction from a central plane and the first and second mold cores facing each other, wherein the cavity edge end is formed. The outer wall of the cavity groove of the preparation step of preparing a mold designed with an inclined or round surface corresponding to the inward angle;

A film insert step of seating the film in the cavity, inserting an edge portion of the film into the cavity groove;

Injecting a plastic resin to the back or the front of the film, forming the back-cover portion and the side-cover portion is integrally formed while the panel and the film are bonded, and at the same time forming a connection portion of the outer wall and the same type;

Separating the mold after the molding step, and obtaining the 3D cover;

It is made, including.

Preferably the cover member comprises a decoration film bonded to the surface of the plastic panel.

In addition, the mold may include a removable slide mold core on the first-mold core or the second-mold core side. If necessary, the plastic resin of the molding step may be used to add glass fiber for strength reinforcement.

Here, the decoration may be designed to have continuity using the back-cover portion, the side-cover portion, and the connection portion formed integrally.

According to an embodiment, the decoration film is a plastic film or a transfer film, in the latter case the release film is separated and removed after the obtaining step.

According to the manufacturing method of the 3D cover of the present invention, the decoration film is integrally injection-molded including the 'back cover part' and 'side cover part' and the 'connection part' of the side cover part end. Therefore, as compared with the conventional structure, the economics of assembling and manufacturing of the device are remarkably improved, and the surface usability can be extended by enabling decoration having continuity from the back-cover to the side-cover portion and the connecting portion.

In addition, the outer surface of the end portion of the connecting portion is formed in an inclined or round shape inwardly by a predetermined angle. Therefore, the side grip of the device is improved, and the end of the display window assembled at the top is not exposed to the side or directly contacted with a part of the connection part, which is located inside the connection part. It works.

1 is a view showing a connection configuration of a conventional 3D cover.
Figure 2 is a cross-sectional view showing the structure of a 3D cover manufactured according to the method of the present invention.
Figure 3 is a cross-sectional view showing another structure of the 3D cover manufactured according to the method of the present invention.
Figure 4 is a flow chart showing a manufacturing method of the 3D cover structure according to the present invention.
Figure 5 is a process diagram showing a manufacturing method of the 3D cover of Figure 2 according to the present invention.
Figure 6 is a process diagram showing another manufacturing method of the 3D cover of Figure 2 according to the present invention.
7 is a process chart showing a manufacturing method of the 3D cover of Figure 3 according to the present invention.
Figure 8 is a process diagram showing another manufacturing method of the 3D cover of Figure 3 according to the present invention.

The method of manufacturing the 3D cover of the present invention described or not described above will become more apparent through the following description of the embodiments described with reference to the accompanying drawings. The structure of the '3D cover' made according to the method of the present invention is indicated by reference numeral 10.

2 and 3, the 3D cover 10 is based on a cover member 14 including a plastic panel 11 and a decoration 13 formed on one or both surfaces of the surface. Preferably, the cover member 14 comprises a decoration film 12 bonded to the surface of the plastic panel 11, specifically, the decoration 13 is formed in the film 12 and the panel 11 and the panel 11. When the film 12 is bonded, it is disposed between the elements 11 and 12 (see FIG. 2) or is formed on the outside of the film 12 (see FIG. 3), and in some cases the film 12 It may be formed on both sides of.

The decoration 13 includes all that can be displayed, such as a predetermined logo, letters, symbols, shapes, patterns, colors, and the like, such as gradation printing, UV pattern, vapor deposition, silk printing, etc. It can be used without limitation. In addition, for the surface protection of the film 12, the decoration 13 and the plastic panel 11, hard coating or other means may be applied. However, the decoration 13 and the hard coating related description described above are not unique in the present invention.

As a technical and structural feature, the 3D cover 10 is a back-cover portion 15, the side-cover portion 16 and the connecting portion 17 using the cover member 14 according to the manufacturing method of the present invention. It is formed integrally.

The back-cover portion 15 is a portion covering the back of the device, and has a substantially planar shape. In addition, the side-cover portion 16 is a portion for covering the side of the device is configured in a 3D form bent at a constant height extending from the edge of the back-cover portion 15. In addition, the connection part 17 is a part to which the upper display window of the device (see reference numeral 3 'front cover' of FIG. 1) is directly or indirectly connected, and the outer surface of the end portion of the side-cover part 16 is It is formed in an inclined or round shape to have a predetermined inward angle (θ).

In the above description, the back-cover part 15, the side-cover part 16, and the connection part 17 are integrally formed, and thus the decoration 13 is the back-cover part 15 and the side-cover part ( 16) and connecting portion 17 can be designed to have continuity. And the connecting portion 17 is formed integrally with the end of the side-cover portion 16, thereby, without a separate medium, such as a conventional connecting frame (see '4' in Figure 1), and the 3D cover 10 The front-cover (see symbol '3' in Fig. 1) can be connected.

The 3D cover 10 is integrally manufactured through the film 12 insert injection molding method, the manufacturing method of the present invention is particularly the back-cover portion 15 and the side-cover portion 16 and the connecting portion 17 It is judged to be very suitable for integrally forming). Hereinafter, the manufacturing method of the 3D cover 10 of the present invention will be described in detail with reference to FIGS. 4 and 5.

Preparation step (S1)

This step is to prepare a predetermined decoration film 12 and the mold 20. The film 12 is provided here in a 3D form that is formed such that the portion of the edge 12b from the central plane 12a is approximately 90 ° with a sufficient height. Here 'height' is a height to cover the side of the device, it should be properly designed according to the side thickness of the device to be applied.

Since the form or method of the decoration 13 has been described above, a description thereof will be omitted.

Meanwhile, the mold 20 forms a cavity 23 having a shape corresponding to the 3D cover 10 by using first and second mold cores 21 and 22 that face and face each other at an upper and a lower position. However, at this time, the outer wall 24 of the cavity groove 23a formed at the edge end of the first-mould core 21 is designed inwardly inclined or rounded. As shown in FIG. 5, the first-mould core 21 may be an upper-mould and the second-mould core 22 may be a lower-mould, but for convenience of manufacturing the 3D cover 10, the positions thereof may be interchanged. It may be.

The configuration and shape of the mold 20, the cavity 23, the film 12, and the like shown in FIG. 5 are only partial portions of the cross-section for the sake of understanding.

Insert step (S2)

In this step, the prepared decoration film 12 is seated in the cavity 23 using the second mold core 22. At this time, the 3D edge portion 12b of the film 12 protrudes upward from the second-mould core 22 and is inserted into the cavity groove 23a of the first-mould core 21 side. For example, as shown in FIG. 7, a design in which the second mold core 22 includes the cavity groove 23a may be possible, in which case the direction of the edge portion 12b may be changed.

Molding step (S3)

This step is a step of injection molding the 3D cover 10 by injecting a high-temperature, high-pressure plastic resin into the first and second mold core (21, 22). Specifically, by injecting and cooling a high-temperature, high-pressure plastic resin to the rear surface of the film 12, the panel 11 of the resin solid and the film 12 are bonded while the back-cover portion 15 And the side-cover portion 16 are integrally formed, and at the end portion of the side-cover portion 16, the same connection portion 17 with the outer wall 24 is formed.

That is, the 3D cover 10 corresponds to the outer wall 24 shape of the cavity groove 23a on the first-mould core 21, and the connecting portion 17 is inclined or has a predetermined inward angle θ. It is formed of a round face.

In this step, the plastic resin preferably uses a PC (polycarbonate, polycarbonate) resin, but glass fiber may be added as a reinforcing material to reinforce the strength of the material.

Obtaining Step (S4)

This step is to separate the mold 20 to obtain a 3D cover 10. Specifically, when the molding step is finished, the mold is demolded, and the back-cover portion 15, the side-cover portion 16, and the end portion of the side-cover portion 16 are formed on the cover member 14. The 3D cover 10 of FIG. 2 structure in which the connection part 17 is integrally obtained can be obtained.

Finishing step (S5 )

This step is to improve the completeness of the product by post-processing the 3D cover 10 obtained. In this step, the ends or other parts of the connecting portion 17 may be cut or ground, if necessary.

According to an embodiment, the decoration film 12 may be a conventional plastic film or a transfer film, and in the latter case, the release film will be peeled off from the surface of the thermally transferred decoration 13 after the obtaining step S4. . Meanwhile, in order to protect the surface of the obtained 3D cover 10, a hard coating may be formed on the surface of the 3D cover 10 by using a flow coating or a spray coating method.

Referring to FIG. 6, in addition to the first and second mold cores 21 and 22, the mold 20 includes a removable slide mold core which provides all or a part of the outer wall 24 of the cavity groove 23a from the outside. 25) more.

That is, when inserting the film 12 in the inserting step S2, the outer wall 24 may be disposed on the first-mould core 21 side since it may be caught in the cavity 23 portion of the first-mould core 21. It is configured to include a slide mold core 25 to provide. Unlike the first and second mold cores 21 and 22 disposed to face each other, the slide mold core 25 may move sideways in the process. In the drawing, the shapes of the first, second, slide mold cores 21, 22, and 25 are each composed of one body, but may be divided into several pieces by slightly different shapes depending on the design. The slide mold core 25 may be disposed outside as shown in FIG. 6, but may be disposed inside for the convenience of design. When the slide mold core 25 is used, the risk of the film 12 being caught on the mold 20 may be reduced, but the manufacturing cost may increase and manufacturing complexity may be complicated. You can adopt the method.

7 and 8 show that the plastic resin is injected to the 'front' rather than the back of the insert film 12 in the molding step S3, and thus the 3D cover 10 of FIG. You can get it. Here, a transparent material is used in order to be able to see the interior decoration 13 from the outside with the plastic resin, and in this case, a conventional PC (polycarbonate, polycarbonate) resin is used. In addition, since the configuration of the preparation step (S1), the insert step (S2), the forming step (S3), the finishing step (S4), the obtaining step (S5) and the mold 20 and the like described above, detailed description of each step Will be omitted.

The decoration film 12 is a plastic film or a transfer film. In the latter case, after the obtaining step (S4) the release film will be separated and removed.

The structure of the 3D cover 10 of the present invention constructed and manufactured as described above, the back-cover portion 15 and the side-cover portion 16 and the side cover portion 16 using the decoration film 12 The shape of the end portion is injection molded integrally up to and including the 'connecting portion 17', which is inclined or rounded with a predetermined inward angle [theta].

Thus, as compared with the conventional structure using a separate side frame (reference numeral '4' in FIG. 1), the economics of assembling and manufacturing the device are remarkably improved, while the side-cover portion 16 from the back-cover portion 15 is improved. And a decoration having continuity up to the connecting portion 17, and the outer surface of the end portion is formed in an inclined or round shape having a predetermined inward angle θ to improve the grip of the side surface, and the end of the assembled display window is There is a special effect of improving the usability, such as being located directly inside the connection portion 17 to protect from external impact without being exposed directly.

10. 3D cover
11. Panel
12. Film
12a. Center plane
12b. edge
13. Decoration
14. Cover member
15. Back cover
16. Side cover part
17. Connections
20. Mold
21. 1st-Mold Core
22. No. 2-Mold Core
23. Cavity
23a. Cavity home
24. Outer Wall
25. Slide Mold Core
θ. Inward angle

Claims (10)

A cover member (14) comprising a plastic panel (11) and a decoration (13) formed outside thereof, the back-cover portion (15) covering the back of the device, the device at the edge of the back-cover portion (15) The side-cover portion 16 which is bent and extended to a height capable of covering the side of the front surface of the device is formed in an inclined or round shape having an inward angle θ on the outer surface of the end portion of the side-cover portion 16. As a method of manufacturing the 3D cover 10 is formed integrally with the connecting portion 17 is directly or indirectly connected,
The 3D cover 10 using the 3D-shaped decoration film 12 having the edge 12b formed from the central plane 12a in the height direction and the first and second mold cores 21 and 22 facing each other. The cavity 23 is formed in a shape corresponding to the outer wall 24 of the cavity groove 23a at the edge end of the cavity 23, the mold 20 is designed with an inclined or rounded surface corresponding to the inward angle (θ) Preparing a step (S1);
An insert step (S2) for seating the film (12) in the cavity (23) and inserting an edge (12b) portion of the film (12) into the cavity groove (23a);
By injecting a plastic resin to the back of the film 12, the panel 11 and the film 12 are bonded to form a back-cover portion 15 and the side-cover portion 16 integrally formed at the same time A molding step (S3) in which the outer wall 24 and the same connection part 17 are formed;
Separating the mold 20 after the molding step (S3), to obtain the 3D cover 10 to obtain a step (S4);
3D cover manufacturing method comprising a.
A cover member (14) comprising a plastic panel (11) and a decoration (13) formed therein, the back-cover part (15) covering the back of the device and the device at the edge of the back-cover part (15). The side-cover portion 16 which is bent and extended to a height capable of covering the side of the front surface of the device is formed in an inclined or round shape having an inward angle θ on the outer surface of the end portion of the side-cover portion 16. As a method of manufacturing the 3D cover 10 is formed integrally with the connecting portion 17 is directly or indirectly connected,
The 3D cover 10 using the 3D-shaped decoration film 12 having the edge 12b formed from the central plane 12a in the height direction and the first and second mold cores 21 and 22 facing each other. The cavity 23 is formed in a shape corresponding to the outer wall 24 of the cavity groove 23a at the edge end of the cavity 23, the mold 20 is designed with an inclined or rounded surface corresponding to the inward angle (θ) Preparing a step (S1);
An insert step (S2) for seating the film (12) in the cavity (23) and inserting an edge (12b) portion of the film (12) into the cavity groove (23a);
By injecting a plastic resin to the entire surface of the film 12, while the panel 11 and the film 12 are bonded, the back-cover portion 15 and the side-cover portion 16 are integrally formed and simultaneously A molding step (S3) in which the outer wall 24 and the same connection part 17 are formed;
Separating the mold 20 after the molding step (S3), to obtain the 3D cover 10 to obtain a step (S4);
3D cover manufacturing method comprising a.
The method of claim 1,
The plastic resin in the molding step (S3), using a PC (polycarbonate, polycarbonate), but the manufacturing method of the 3D cover, characterized in that the glass fiber added for strength reinforcement.
The method of claim 2,
Plastic molding in the molding step (S3) is a method of producing a 3D cover, characterized in that using a transparent PC (polycarbonate, polycarbonate).
The method according to claim 1 or 2,
The cover member (14) comprises a decoration film (12) bonded to the surface of the plastic panel (11).
The method according to claim 1 or 2,
The mold (20) is a manufacturing method of the 3D cover, characterized in that it comprises a removable slide mold core (25).
The method according to claim 1 or 2,
After the obtaining step (S4), the method of producing a 3D cover, characterized in that to form a hard coating on the surface of the 3D cover 10 using a flow coating or spray coating method.
The method according to claim 1 or 2,
The decoration (13) is a method of manufacturing a 3D cover, characterized in that designed to have a continuity using the back-cover portion (15), the side-cover portion (16) and the connecting portion (17) integrally molded.
The method according to claim 1 or 2,
End portion of the connecting portion 17 is a manufacturing method of the 3D cover, characterized in that the cutting after the obtaining step (S4).
The method according to claim 1 or 2,
The decoration film 12 is a plastic film or a transfer film, in the latter case, the release film is separated and removed after the obtaining step (S4).

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