WO2021034119A1

WO2021034119A1 - Mobile terminal cover glass forming apparatus

Info

Publication number: WO2021034119A1
Application number: PCT/KR2020/011090
Authority: WO
Inventors: 윤성덕; 권종석; 박민석; 김연국; 이봉구; 김경식
Original assignee: 주식회사 뉴영시스템
Priority date: 2019-08-20
Filing date: 2020-08-20
Publication date: 2021-02-25
Also published as: CN113039161A; KR102091435B1

Abstract

A disclosed mobile terminal cover glass forming apparatus comprises: a forming chamber having a forming space therein; a heat source unit provided on an inner surface forming the forming space; a mold unit which is disposed in the forming space and away from the heat source unit, is heated by means of the heat transferred by means of the heat source unit, and forms an object to be formed placed therein; and a cooling unit for supplying a cooling gas which passes through the inside of the forming chamber and cools the mold unit.

Description

Cover glass molding device for mobile terminals

The present invention (Disclosure) relates to an apparatus for forming a cover glass for a mobile terminal, and specifically, to an apparatus for forming a cover glass for a mobile terminal by using a mold to form glass respectively disposed on the front display and the rear of the mobile terminal. About.

Here, background technology related to the present invention is provided, and these do not necessarily mean known technology (This section provides background information related to the present disclosure which is not necessarily prior art).

Mobile terminal cover glass refers to glass that is installed on the front and rear of portable terminals such as mobile phones and smartphones, and as the design is gradually improved, the flat cover glass is changing to a molded cover glass having a curved surface. .

Specifically, as shown in FIGS. 1 and 2, the upper and lower ends or left and right ends of the cover glass are formed by bending them into a curved surface, or further, the upper and lower and left and right ends of the cover glass are formed by bending them into a curved surface to improve the design feeling.

In order to form a cover glass having such a shape, a mold that pressurizes the end of the formed flat glass in a high temperature environment is essential.

For example, the upper mold is formed by protruding a pressing portion provided with a horizontal surface and a streamlined forming surface to be formed while being in surface contact with the flat glass to be molded on the bottom of the upper mold body, and the supporting surface corresponding to the pressing portion is Since it is composed of a lower mold made of the provided lower mold body, it is a technology to form by pressing only the molded part of the flat glass by providing a separate mold for molding by pressing only the molded part of the cover glass.

However, the uniformity of the mold temperature is required for the molding quality of the cover glass, the heating time of the mold needs to be reduced to improve productivity, and it is required to mold a plurality of cover glasses in a single process.

In this regard, in a molding apparatus using a known mold, a heating block is added to the mold to heat the mold. In this case, it is difficult to form a uniform mold temperature, and it is difficult to reduce the mold temperature increase time.

The present invention (Disclosure) is a cover glass for a mobile terminal capable of miniaturization of the mold and rapid heating of the mold by placing a halogen lamp as a heat source on the inner wall of the molding chamber and disposing a mold separated from the heat source inside the molding chamber. One object is to provide a molding apparatus.

The present invention (Disclosure) is a cover for a mobile terminal capable of forming a plurality of glasses in a single process by arranging a plurality of molds in the molding chamber because the temperature of the entire inside of the molding chamber is controlled by a heat source disposed on the inner wall. One object is to provide a glass molding apparatus.

Here, a summary of the present invention is provided, and this section provides a general summary of the disclosure and is not a comprehensive disclosure of its full scope or all of its features).

In order to solve the above problems, the apparatus for forming a cover glass for a mobile terminal according to one of the various aspects describing the present invention includes: a forming chamber having a forming space therein; A heat source unit provided on an inner surface forming the molding space; A mold unit separated from the heat source unit, disposed in the molding space, heated by heat transferred by the heat source unit, and molding a molding object disposed therein; And a cooling unit for supplying a cooling gas for cooling the mold unit while passing through the inside of the molding chamber.

In the cover glass molding apparatus for a mobile terminal according to an aspect of the present invention, the molding space has an upper and lower surfaces facing each other in a vertical direction, and the heat source unit is provided with a halogen lamp, and the It is provided on at least the upper surface of the upper surface and the lower surface, and the mold unit has an upper mold provided in a flat plate shape parallel to the upper surface, and a lower mold provided in a flat plate shape with the lower surface, and the upper mold and One of the lower molds may be fixed to the forming chamber, and the other may be provided to reciprocate in a direction orthogonal to the upper surface and the lower surface.

In the cover glass molding apparatus for a mobile terminal according to an aspect of the present invention, the upper mold and the lower mold have upper and lower molding surfaces of a shape matched to each other on surfaces facing each other, the The lower molding surface may be provided in a shape inserted into the upper molding surface.

In the cover glass forming apparatus for a mobile terminal according to an aspect of the present invention, in the lower mold, a sheet-shaped heater is disposed on a surface opposite to the lower forming surface, and may be made of a silicon carbide material.

In the cover glass forming apparatus for a mobile terminal according to an aspect of the present invention, the lower mold is provided to be fixed to the lower surface of the forming space, and the forming chamber of the forming chamber to grip the forming object on the lower forming surface. It may have a vacuum exhaust pipe communicating with the outside and the lower molding surface.

In the cover glass forming apparatus for a mobile terminal according to an aspect of the present invention, the forming chamber may have a gate that is selectively opened and closed for input of the molding object or discharge of the molded object after molding.

In the apparatus for forming a cover glass for a mobile terminal according to an aspect of the present invention, a plurality of the mold units may be disposed on one surface parallel to the upper surface and the lower surface in the forming space.

In an apparatus for forming a cover glass for a mobile terminal according to an aspect of the present invention, the heat source unit includes a reflector for reflecting light irradiated from the halogen lamp toward the mold unit, and has the halogen lamp and the halogen lamp. One surface of the reflecting plate facing may have scattering protrusions having an irregular shape.

According to the present invention, since the heat source unit for heating the mold unit is provided separately from the mold unit, it is possible to obtain the effect of miniaturization of the mold unit, ensuring temperature uniformity, and reducing the heating time.

According to the present invention, since the temperature of the entire interior of the molding space is controlled by the heat source unit disposed on the inner wall of the molding chamber, a plurality of molding objects can be molded in a single process by arranging a plurality of mold units in the molding chamber. have.

According to the present invention, by providing a reflecting plate having scattering protrusions in the heat source unit, it is possible to prevent the light generated from the heat source unit from being concentrated on a specific portion of the mold unit.

According to the present invention, heating, molding, and cooling are performed in a single chamber in a batch type rather than an in-line type.

1 and 2 are views showing a shape of a cover glass of a mobile terminal as an example.

3 is a view showing an embodiment of an apparatus for forming a cover glass for a mobile terminal according to the present invention.

FIG. 4 is a view of the mobile terminal cover glass forming apparatus of FIG. 3 viewed from a different direction.

5 is a view showing an example of an upper mold and a heat source unit in FIG. 3.

Hereinafter, an embodiment implementing the apparatus for forming a cover glass for a mobile terminal according to the present invention will be described in detail with reference to the drawings.

However, the intrinsic technical idea of the present invention cannot be said to be limited by the embodiments to be described below, and the intrinsic technical idea of the present invention is given below by a person skilled in the art. It turns out to cover the range that can be easily proposed by a method of substitution or change of the embodiment described in FIG.

In addition, since the terms used below are selected for convenience of description, in grasping the intrinsic technical idea of the present invention, it is not limited to the dictionary meaning and is appropriately interpreted as a meaning consistent with the technical idea of the present invention. Should be.

FIG. 3 is a view showing an embodiment of the cover glass forming apparatus for a mobile terminal according to the present invention, FIG. 4 is a view of the cover glass forming apparatus for a mobile terminal of FIG. 3 viewed from a different direction, and FIG. 5 is an upper part in FIG. A diagram showing an example of a mold and a heat source unit.

3 to 5, the cover glass molding apparatus 100 for a mobile terminal according to the present embodiment includes a molding chamber 110, a heat source unit 120, a mold unit 130, and a cooling unit 140. Include.

The forming chamber 110 is provided in the shape of a braided column (eg, a rectangular parallelepiped, a cylinder, an elliptical column, a polyhedral column) having a parallel upper and lower surfaces and a relatively small height compared to the area of the upper and lower surfaces. The upper and lower parts may be hinged to separate and open and close the upper part.

The molding chamber 110 has a molding space 111 for molding the molding object 10, and the molding space 111 faces each other in the vertical direction as described above and is parallel to the upper surface 111a and the lower surface 111b. ), the height is relatively small compared to the area of the upper surface 111a and the lower surface 111b.

The forming chamber 110 is formed of a material having high thermal conductivity (eg, aluminum) so that the temperature of the inner forming space 111 is uniformly formed.

The heat source unit 120 is configured to heat the mold unit 130 provided in the molding space 111 to have a temperature suitable for molding, and is provided on an inner surface forming the molding space 111.

In this embodiment, by heating the mold unit 130 to have a temperature suitable for molding while the heat source unit 120 is provided separately from the mold unit 130, it is possible to downsize the mold unit 130, As a result, it is possible to shorten the time required to heat the downsized mold unit 130 (heating time). In addition, since it is easy to uniformly maintain the temperature of the downsized mold unit 130, the molding quality of the molding object 10 is improved.

The heat source unit 120 is provided with a halogen lamp emitting infrared rays, and may be provided on both the upper surface 111a and the lower surface 111b of the molding space 111, or may be provided only on the upper surface 111a.

The mold unit 130 is separated from the heat source unit 120 and disposed in the molding space 111, heated by the heat transferred by the heat source unit 120, and molds the molding object 10 disposed therein. Configuration.

The mold unit 130 is composed of an upper mold 131 and a lower mold 132, and is provided to engage with each other for molding the object 10.

On the other hand, in this embodiment, the lower mold 132 is provided while being fixed to the forming chamber 110, and the upper mold 131 has an upper surface 111a and a lower surface 111b so as to engage with the corresponding lower mold 132. It is provided to reciprocate in a direction orthogonal.

Unlike FIG. 3, it is not excluded that the upper mold 131 and the lower mold 132 are formed opposite to each other.

At this time, the upper mold 131 and the lower mold 132 have an upper molding surface 131a and a lower molding surface 132a having a shape matching each other on a surface facing each other, but the lower molding surface 132a is the upper It is provided in a shape that is inserted into the molding surface (131a).

The upper mold 131 and the lower mold 132 are made of silicon carbide.

Accordingly, adhesion between the object and the mold can be prevented when forming the cover glass, and it is also effective to rapidly increase the heating temperature of the mold. In addition, even if the temperature of the mold is raised to 550℃ or higher suitable for forming a cover glass, the generation of thermal oxide or dust is prevented.

In contrast, when the cover glass (glass) is used as a molding object and the temperature of the mold is set to 550℃ or higher, and Al and Pt are coated as a mold material, the adhesion is high and thermal oxide and discoloration are generated, and the mold material is kanthal ( Even when KANTHAL, an alloy composed mainly of iron and chromium, aluminum, etc.) is applied, there is a problem of high adhesion and generation of thermal oxide, and in the case of graphite, there is a problem of low adhesion but generation of dust.

In addition, product defects occur due to particle generation, resulting in a decrease in yield, and an increase in polishing time, which is a subsequent process.

In addition, the lower mold 132 is provided to be supported by a susceptor 150 made of silicon carbide in which an ultra-thin heater disposed on the opposite surface of the lower molding surface 132a is embedded.

The susceptor 150 mixes and disperses the prepared pulverized raw material with a binder system and a solvent system to produce a slurry, and in order to produce a target 400㎛ green sheet, a tape with a viscosity of about 20,000 cps through a defoaming process. Casting proceeds.

The produced green sheet is cut to a size considering the shrinkage rate, and the designed pattern is screen printed and laminated, followed by a WIP process to prevent delamination.

In addition, the BBO process burns out organic substances contained in the green sheet before reduction firing to remove residual organic substances, and then proceeds to a reduction firing process at 200 to 1750°C to produce a heater, and a nickel wire is brazed to the tungsten electrode for terminal connection. To complete the heater.

The cooling unit 140 is configured to supply a cooling gas for cooling the mold unit 130 while passing through the inside of the molding chamber 110.

On the other hand, in the cover glass molding apparatus 100 for a mobile terminal according to the present embodiment, the lower mold 132 is provided by being fixed to the lower surface 111b of the molding space 111, and the molding object 10 is placed on the lower molding surface. It has a vacuum exhaust pipe (151a) communicating the outer and lower molding surface (132a) of the forming chamber 110 so as to be gripped by (132a).

On the other hand, in the cover glass molding apparatus 100 for a mobile terminal according to the present embodiment, the molding chamber 110 is selectively opened and closed for the input of the molding object 10 or the discharge of the molding object 10 that has been molded. It has a gate 113.

For the input and discharge of the object 10, a robot structure applied to a semiconductor process is applied.

On the other hand, in the cover glass forming apparatus 100 for a mobile terminal according to the present embodiment, the mold unit 130 has a plurality of the upper surface 111a and the lower surface 111b on one surface parallel to the forming space 111. Is placed.

Accordingly, the molding of a plurality of molding objects is completed in a single molding process, thereby greatly improving productivity.

On the other hand, in the cover glass molding apparatus 100 for a mobile terminal according to the present embodiment, the heat source unit 120 has a reflector 122 that reflects so that the light irradiated from the halogen lamp is irradiated toward the mold unit 130 , It is preferable that one surface of the reflector 122 facing the halogen lamp 121 has an irregularly shaped scattering protrusion 122a.

Accordingly, it is possible to prevent the light generated from the heat source unit from being concentrated on a specific portion of the mold unit.

On the other hand, in this embodiment, the upper mold 131 performs a molding process while performing a vertical reciprocating motion by a motor 161 disposed outside the molding chamber 110, and a linear reciprocating motion by the motor 161 The drive shaft 162 is not directly connected to the upper mold 131, but is connected to the plate-shaped gas oil member 163, and the gas oil member 163 is at various coupling positions 164 that do not coincide with the driving shaft 162. It is combined with the upper surface of the upper mold 131.

Accordingly, the force applied by the drive shaft 162 can be spread and transmitted over the entire upper mold 131.

Claims

A forming chamber having a forming space therein;

A heat source unit provided on an inner surface forming the molding space;

A mold unit separated from the heat source unit, disposed in the molding space, heated by heat transferred by the heat source unit, and molding a molding object disposed therein; And

Cover glass molding apparatus for a mobile terminal comprising a; cooling unit for supplying a cooling gas for cooling the mold unit while passing through the inside of the molding chamber.
The method according to claim 1,

The molding space, facing each other in the vertical direction and has a parallel upper and lower surfaces,

The heat source unit is provided with a halogen lamp, is provided on at least the upper surface of the upper surface and the lower surface,

The mold unit has an upper mold provided in a flat plate shape parallel to the upper surface, and a lower mold provided in a flat plate shape with the lower surface, and any one of the upper mold and the lower mold is fixed to the molding chamber. And, the other side is a cover glass forming apparatus for a mobile terminal provided to reciprocate in a direction orthogonal to the upper surface and the lower surface.
The method according to claim 2,

The upper mold and the lower mold have an upper molding surface and a lower molding surface having a shape matched to each other on faces facing each other, and the lower molding surface is inserted into the upper molding surface. Glass forming device.
The method of claim 3,

In the lower mold, a sheet-shaped heater is disposed on a surface opposite to the lower molding surface, and a cover glass forming apparatus for a mobile terminal is made of a silicon carbide material.
The method of claim 3,

The lower mold is fixed to the lower surface of the molding space, and has a vacuum exhaust pipe communicating the outer and lower molding surfaces of the molding chamber to grip the molding object on the lower molding surface. Device.
The method according to claim 1,

The molding chamber is a cover glass molding apparatus for a mobile terminal having a gate selectively opened and closed for input of the molding object or discharge of the molding object after the molding is completed.
The method according to claim 2,

The mold unit, in the molding space, a plurality of cover glass molding apparatus for a mobile terminal disposed on one surface parallel to the upper surface and the lower surface.
The method according to claim 2,

The heat source unit has a reflector for reflecting the light irradiated from the halogen lamp to be irradiated toward the mold unit; and,

One surface of the reflector facing the halogen lamp has an irregularly shaped scattering protrusions cover glass molding apparatus for a mobile terminal.