KR20140133008A - Apparatus and method for manufacturing chassis of curved display device - Google Patents

Abstract

The present invention relates to a device and a method to manufacture a chassis for a curved display device. The objective of the present invention is to provide a device and a method to manufacture a chassis for a curved display device, capable of forming a complete curve shape on the entire surface without being bent while maintaining a thin thickness to be used in the curved display device. To achieve the objective, the method includes: a processes of respectively inserting adhesive agents between an upper plate and a core member, and between the core member and a lower plate to be stacked while stacking the core member between the upper plate and the lower plate included in a chassis; melting the adhesive agents inserted between the plate materials by heating the stacked plate materials in a heating mold; pressurizing the heated stacked plate materials in a cooling mold to have a curve shape and cooling the plate materials in a pressurized state such that the plate materials of the upper plate, the lower plate, and the core member can be bonded and fixated to be integrated by the cured adhesive agents while maintaining the curve shape.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a chassis-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chassis manufacturing apparatus for a curved display device, and more particularly, to an apparatus and a method for manufacturing a chassis used in a curved display device.

Recently, with the development of information processing apparatuses, the demand for display apparatuses such as image display apparatuses, video display apparatuses, and the like that serve as interfaces between users and information processing apparatuses is rapidly increasing.

As a kind of such a display device, there are known a color cathode ray tube (CRT), a fluorescent display (VFD), a plasma display device (PDP), a light emitting diode (LED), a liquid crystal display TFT-LCDs, and organic light emitting diodes (OLEDs).

Among such display devices, an ultra-thin liquid crystal display device (TFT-LCD), which has been recently improved in terms of competitive performance, will be described.

The ultra-thin liquid crystal display device displays information using the electric and optical properties of a liquid crystal material injected into a liquid crystal display panel. In recent years, monitors and video display devices of televisions and computers have been used as portable video cameras, digital cameras, Automobile navigation devices, various information devices, and communication devices are increasingly being applied.

The ultra-thin liquid crystal display device as described above includes a liquid crystal display panel assembly that receives an image signal from an information processing apparatus and converts the image signal into a liquid crystal control signal, and then controls the amount of light transmitted through the liquid crystal to visually recognize an image signal of an electrical form. .

The liquid crystal display panel assembly may further include a liquid crystal display panel for displaying an image using liquid crystal, a printed circuit board for applying an electrical signal to the liquid crystal display panel, and a liquid crystal display panel for interconnecting the liquid crystal display panel and the printed circuit board, And a flexible circuit board for reducing the planarity.

Further, since the ultra-thin liquid crystal display device uses a liquid crystal that is a light receiving element that does not emit light by itself, it needs a backlight assembly installed on the lower surface of the liquid crystal display panel assembly in addition to the liquid crystal display panel assembly to provide light to the liquid crystal display panel assembly .

The components are housed in a case for protection and fixing from external impact. Components of the backlight assembly are sequentially housed on the bottom of the case, and the liquid crystal display panel assembly is housed thereon.

Meanwhile, in the ultra thin liquid crystal display device, a chassis is coupled to the case to prevent the display panel including the display panel assembly or the like, which is simply seated in the case from being detached from the outside.

The chassis is divided into a top chassis and a bottom chassis according to the front and rear positions of the display panel. The chassis is made of aluminum alloy, stainless steel (SUS), zinc-coated steel sheet (SECC) Of a metal material.

In order to manufacture a chassis, a multistage press process is required. First, the metal plate is cut into a predetermined size and shape. The metal plate is cut so as to have a rectangular shape as a whole. Is processed by the method.

Next, the plate material is marked with a position to be a post-processing reference, and a piercing for processing a small hole as required, an embossing for making a local protrusion, a Z bending, a burring, Slitting, engraving, etc., are further processed.

Thereafter, a box bending process is performed in which the four sides of the plate are bended in a 'A' shape with a predetermined width, whereby the plate is divided into the upper and four sides .

After completion of the molding process as described above, the manufacturing process of the chassis is completed through the post-process such as the final cleaning process.

On the other hand, in recent display devices, much attention has been focused on the enlargement and high quality of the display devices, so that the chassis components are being actively researched in order to enhance the smoothness and strength in accordance with such a trend of enlargement.

As a result, most of the large-sized display devices of 42 inches or more are currently used in a bottom chassis in which a top plate and a bottom plate are laminated.

Since the bottom chassis is used in a display device such as a large-sized LED, an OLED, etc. in addition to an ultra-thin liquid crystal display device, the bottom chassis is not limited to an ultra-thin liquid crystal display device.

On the other hand, a curved display device (Curved TV) has been developed in which a screen is distorted by giving a curvature instead of a flat plate as the display device is gradually enlarged.

The curved display device is a next generation display capable of displaying full image quality and resolution while supporting full HD resolution. Unlike conventional flat panel display devices, the distance from the viewer's eyes to the center and the side of the screen is the same, There is an advantage that the phenomenon of blurring of the end of the viewing angle can be minimized.

In addition, the curved display device is superior to the flat panel display in terms of three-dimensional feeling and real feeling, and it is expected to receive the spotlight as a next-generation display because it has the advantage of greatly increasing the immersion of viewers into the image.

However, there is a need for a method of manufacturing a curved surface chassis according to the development of a curved display device. However, in the related art, a method of partially folding a plate of a chassis to be assembled into a shape similar to a curved display surface is applied have.

This is a method of forcibly folding a plate to form an overall shape that conforms to the shape of the display curved surface. It is preferable that the chassis used in the curved display device should also have a shape that has a perfect curved surface in the entire area. However, A method for manufacturing a chassis having been formed has not been developed yet.

In the conventional manufacturing process, the entire shape is formed by partially folding the plate material of the chassis in accordance with the curved shape of the display. As a result, it is not easy to manufacture the chassis, and the shape of the curved surface A complete curved surface having a curvature on the entire surface without bending) is difficult to meet the quality requirement level of the chassis.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a curved-shape chassis manufacturing apparatus and a manufacturing method thereof, which are capable of being used in a curved display apparatus, The purpose is to provide.

According to another aspect of the present invention, there is provided a method of manufacturing a curved surface chassis for use in a curved display device, the method comprising the steps of: laminating a core material between an upper plate and a lower plate constituting a chassis, Inserting an adhesive between the core and the lower plate and stacking them; Heating the laminated plate materials in a heating mold to melt the adhesive inserted between the plate materials; The heated laminated sheets are pressurized in a cooling mold to form a curved surface and cooled in a pressurized state so that the plates of the upper plate, the lower plate and the core are integrally adhered and fixed by the cured adhesive to maintain the curved shape The present invention also provides a method of manufacturing a chassis for a curved display device.

According to another aspect of the present invention, there is provided an apparatus for manufacturing a curved chassis for use in a curved display device, the apparatus comprising: a heater for heating an adhesive material between an upper plate and a core material, A heating mold; A cooling mold having a curved pressing jig for pressurizing the heated laminated plate materials into a curved surface and having cooling means for cooling the pressing plates in the curved pressing jig, Wherein the curved surface shape of the upper plate, the lower plate, and the core material is maintained while being adhered and fixed together by the cured adhesive.

Thus, according to the apparatus and method for manufacturing a chassis for a curved display device of the present invention, an adhesive is interposed between the upper plate and the core, between the lower plate and the core, and the upper plate, the lower plate and the core The heated laminated sheet materials are pressed and cooled together with a cooling mold to form a curved surface, and the upper plate, the lower plate and the core are integrally adhered and fixed together by a cured adhesive, Shaped chassis having a curved surface shape without bending on the entire surface while maintaining a thin thickness so as to be used in a curved surface display device can be manufactured.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a laminated state of a plate material and an adhesive sheet constituting a bottom chassis before being placed on a heating mold in an embodiment of the present invention. Fig.
2 is a front view showing a heating mold of the chassis manufacturing apparatus according to the embodiment of the present invention.
3 is a side view showing a heating mold of a chassis manufacturing apparatus according to an embodiment of the present invention.
4 is a jig bottom view showing a pressing surface of a top mold in a heating mold of a chassis manufacturing apparatus according to an embodiment of the present invention.
5 is a jig top view showing a pressing surface of a lower mold in a heating mold of a chassis manufacturing apparatus according to an embodiment of the present invention.
FIG. 6 is a front view showing a heating mold and a cooling mold of a chassis manufacturing apparatus according to an embodiment of the present invention, showing a cooling process in a cooling mold after a heating process in a heating mold.
7 is a front view showing an upper and a lower curved pressing jig in a cooling mold of a chassis manufacturing apparatus according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains.

An embodiment of a manufacturing apparatus and a manufacturing method capable of manufacturing a bottom chassis for a curved display device (curved surface TV) by assembling an upper plate and a lower plate will be described.

The manufacturing apparatus and the manufacturing method according to the embodiment of the present invention are produced so as to manufacture a curved bottom chassis having a complete curved shape without bending on the entire surface according to the curved shape of the display panel.

In order to achieve the above object, the present invention provides a method of manufacturing a laminated body, comprising the steps of: laminating an adhesive between an upper plate and a core, a lower plate and a core, laminating the upper plate, The laminated plates are pressed and cooled together with a cooling mold to form a curved shape so that the upper plate, the lower plate and the core are adhered and fixed together by the cured adhesive so that the curved shape is maintained.

1 is a view showing a laminated state of plate members constituting a bottom chassis, that is, an upper plate 11, a lower plate 12 and a core member 13 before being placed on a heating mold in the embodiment of the present invention, , It is put into the process through processes such as washing and inspection (hall vision inspection, inspection using Hall checker, etc.) after press forming and punching process to make the required shape.

The upper plate 11 is also prepared through processes such as press molding and washing, and the core member 13 is also prepared after being spread and then cut to an appropriate size.

As shown in Fig. 1, the upper plate 11, the lower plate 12 and the core material 13 are laminated before being fed into the heating process, and the laminated plates 11, 12, An adhesive 14 for bonding is inserted and laminated.

The adhesive 14 is an adhesive means for integrally adhering all the three plate materials 11, 12 and 13 to each other so that the gap between the plate materials, that is, between the upper plate 11 and the core material 13 And an adhesive is inserted between the lower plate 12 and the core material 13 and laminated. The plate materials 10 in the state where the adhesive 14 is inserted and laminated are put into the heating mold.

In the preferred embodiment of the present invention, the core material 14 to be adhered and fixed to be interposed between the upper plate 11 and the lower plate 12 includes a honeycomb core having a honeycomb shape, Corrugated cores having a formed core or a wavy plate shape may be used.

As the adhesive 14, it is preferable to use a solid hot-melt adhesive, more preferably an adhesive having a sheet shape, that is, an adhesive sheet.

As the type of such an adhesive sheet, there are a sheet-type plastic adhesive and a curable adhesive, and either one of them can be used.

The hot-melt adhesive 14 (an adhesive sheet made of a hot-melt adhesive, hereinafter referred to as an 'adhesive sheet') made in a sheet form is melted during a heating process in a heating mold (reference numeral 100 in FIG. 6) The upper plate 11, the lower plate 12 and the core member 13 are integrally fixed and the curved shape of the chassis after the cooling, that is, the upper surface of the upper plate 11, And the curvature of the lower plate 12 in the cooling mold.

When the liquid adhesive is used as the adhesive, it is difficult to uniformly apply a predetermined amount of the liquid adhesive between the plates 11 and 12. In this case, the laminated plate 10 is transferred to the mold until the liquid adhesive There is a problem that can flow out.

In this case, troublesome operations of taping and sealing the edges of the upper plate 11 and the lower plate 12 with the core 13 interposed therebetween may be necessary so that the liquid adhesive does not flow out to the outside.

In addition, in the case of the liquid adhesive, it is difficult to mass-produce the laminated sheet material 10 because the laminated sheet material 10 is bonded in a curved shape and fixed by using a separate mechanism and then dried naturally for a long time until the solvent is volatilized. There is a problem such as a deterioration in productivity and a decrease in mass productivity.

Therefore, the manufacturing process of the present invention includes a cooling step of curing the adhesive after melting while using a solid adhesive, and the adhesive sheet 14 is inserted between the plates 11, 12, After dissolving the adhesive sheet 14, the plates are integrated in such a manner that the adhesive is hardened by forced cooling in the cooling process.

2 is a front view showing a heating mold of a chassis manufacturing apparatus according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view of a manufacturing apparatus according to an embodiment of the present invention Fig. 3 is a side view showing a heating mold of the chassis manufacturing apparatus according to the first embodiment.

FIG. 4 is a jig bottom view showing a pressing surface of a top mold in a heating mold of a chassis manufacturing apparatus according to an embodiment of the present invention, and FIG. 5 is a side view of a heating mold of a lower mold in a chassis manufacturing apparatus according to an embodiment of the present invention, Fig.

In the structure of the heating mold 100 illustrated in FIGS. 2 to 5, when the heater 131 is not installed and the heater installation space is made into a closed passage through which the cooling water can pass, the cooling mold can be configured, Such a cooling metal mold is not shown separately for the cooling metal mold, because the structure of the metal mold itself including the jig is not different from that of the heating metal mold, except that the cooling water channel is provided at the same position in place of the heater Leave.

6 is a front view showing a heating mold and a cooling mold of the chassis manufacturing apparatus according to the embodiment of the present invention and shows a cooling process in the cooling mold 200 after the heating process in the heating mold 100 to be.

7 is a front view showing upper and lower curved pressing jigs 211 and 221 in the cooling metal mold of the chassis manufacturing apparatus according to the embodiment of the present invention.

The manufacturing apparatus of the present invention includes a heating mold 100 for performing a heating process to perform the above-described manufacturing process, and a cooling mold 200 for performing a cooling process (see FIG. 6).

Here, the heating step is a step of heating the upper plate 11 and the lower plate 12, the core material (honeycomb core material, embossed core material or corrugated molded core material) 13 and the adhesive sheet (hot melt adhesive sheet) Is inserted between the upper mold 110 and the lower mold 120 of the heating mold 100 and heated and pressed in the heating mold to melt the adhesive sheet 114. [

In the cooling step, the plate material 10 in the laminated state heated in the heating mold 100 is desorbed and then transferred between the upper mold 210 and the lower mold 220 of the cooling metal mold 200, (Upper plate, lower plate, core material) are integrally fixed by curing the melted adhesive by cooling.

The upper mold 110 and the lower mold 120 in the heating mold 100 and the lower mold 120 and 220 in the cooling mold 200 are both formed on the outer surface of the laminated plate 10, And a pressing portion for pressing the outer surface (lower surface)

At this time, in order to process the chassis into a curved shape, the laminated plates must be deformed into a curved shape when pressed by the upper and lower molds. In the cooling process in which at least the laminated sheets 10 are adhered and fixed, It should be made into a curved shape and then bonded and fixed.

For this purpose, in the manufacturing apparatus of the present invention, at least the pressing mold having a curved surface should be used in the case of the cooling mold 200, so that the laminated plates 10 are bent by the pressing portion, , And can be fixed.

The pressing portions of the heating mold 100 and the cooling metal mold 200 are formed in the body of the upper and lower molds 110 and 210 and the lower molds 120 and 220 to form a pressing surface for pressing the plate material. The upper molds 110 and 210, 121, 221, 221 that can be detachably assembled to the main body of the main body 100. [

7, the jigs 211 and 221 of the cooling metal mold 200 are manufactured so that the pressing surfaces 211a and 221a have curvatures defined in both the upper and lower molds 210 and 220 Since the degree of curvature of the pressing surface determines the degree of curvature of the finished chassis, the pressing surface of the jig is designed to have the same curvature as the target curvature of the chassis (chassis design curvature).

On the other hand, in the case of the heating mold 100, since the jigs 111 and 121 serve to simply heat the laminated sheet material 10 while pressing the laminated sheet material 10 to melt the adhesive sheet 14, the pressing surfaces 111a and 121a ) This planar jig may be used, or a curved jig as illustrated may be used.

The upper plate 11 and the core 13, the lower plate 12 and the core 13 are integrally fixed to each other only when the adhesive sheet 14 is melted in the heating mold 100 and then hardened in the cooling metal mold 200 The jig 111 and 121 in the heating mold 100 exhibit adhesion performance capable of maintaining the adhesive property and the curved shape of the upper plate 11, the core member 13 and the lower plate 12 as they are. 111a, and 121a may be planar.

More specifically, when the laminated sheet materials 10 are deformed into a curved shape at the time of pressing in the cooling metal mold 200 (at the time of mold assembly), only when the adhesive is fully cured by cooling, So that the laminated sheet materials 10 are completely bonded and fixed.

The jigs 111 and 121 in the heating mold 100 merely render the adhesive sheet 14 in a molten state and the jigs 211 and 221 in the cooling mold 200 are formed so that the laminated sheet materials 10 are curved And it has to serve to harden the melted adhesive at the same time as pressing.

The jigs 111 and 121 of the heating metal mold 100 may be used as jigs having flat surfaces of the pressing surfaces 111a and 121a and the pressing surfaces 211a and 221a of the jigs 211 and 221 of the cooling metal mold 200, A curved surface jig having the same curvature as the target curvature of the chassis should be used (see Fig. 6).

However, when the jigs 111 and 121 of the heating metal mold 100 are curved, it is possible to make the sheet materials, especially the honeycomb core material 13, the embossed core material or the corrugated molded core material, , And in this case, it is possible to implement and maintain the curvature defined by the adhesive force of the adhesive only after the cooling step.

After the upper plate 11, the adhesive sheet 14, the core material 13, the adhesive sheet 14 and the lower plate 12 are laminated in the actual manufacturing process as described above, the laminated plates (the adhesive sheet The upper plate, the lower plate, and the core material 10, which are laminated by inserting them, are put into the heating mold 100 and heated and pressed to dissolve the adhesive.

Then, the laminated plate material 10 which has been heated is placed in the cooling metal mold 200, cooled and pressed to cure the adhesive, and the plate material (upper plate, core material, lower plate) is integrally adhered and fixed by the cured adhesive.

After completing the cooling process, the mold is opened to take out the chassis formed by integrally adhering and fixing the plate materials.

As described above, in the present invention, the cooling process for maintaining the curvature of the plates and shortening the curing time of the adhesive is performed after the heating process. Since the upper plate and the lower plate are made of a thin plate material such as stainless steel, When the pressure is applied and the adhesive is hardened, the plates are firmly adhered and fixed by the adhesive, thereby maintaining the curvature.

In the heating mold and the cooling mold, under the control of an external control device (not shown), the driving device moves the upper mold or the lower mold up and down so that the molds are combined or opened for heating or cooling. The device and the control device thereof are well known in the art and will not be described.

The embodiment illustrated in the drawings is an embodiment employing a curved pressing jig for both the heating mold 100 and the cooling mold 200. In the case of the upper molds 110 and 210, the pressing surfaces 111a and 211a are jigs 111 and 211, In the case of the lower molds 120 and 220, the jigs 211 and 221 having the pressing surfaces 211a and 221a concave are used.

As described above, the pressing surface of the upper mold and the pressing surface of the lower mold should have a convex shape and a concave shape opposite to each other, and the pressing surface of the lower mold may be concave and the pressing surface of the upper mold may be convex.

In the heating mold 100, a heater 131 for heating the laminated sheet material 10 to melt the adhesive sheet 14 is attached to the jig 111 of the upper die 110 and the jig 121 of the lower die 120 Respectively.

4 and 5 illustrate the position of the heater 131 on the jigs 111 and 121 of the upper and lower molds 110 and 120 in the heating mold, Fig. 13 is a view showing pressing surfaces of the jigs 111 and 121. Fig.

As shown in the drawing, the jigs 111 and 121 of the upper die 110 and the lower die 120 of the heating die 100 are provided with a plurality of heaters 131 capable of heating the laminated plate through the pressing surfaces during heating and pressing The plurality of heaters provided on the jigs of the upper and lower molds are heated and operated simultaneously during the process so that the laminated sheets are heated from both the upper and lower sides and the adhesive sheet inserted between the sheets is melted .

At this time, a plurality of heaters 131 inserted and embedded in the jigs 111 and 121 are arranged in a long side (in the vertical direction in the drawing) at predetermined intervals in the left and right direction in the drawing as viewed from the pressing surface of the jig, The number of the heaters is set so that the heating of the laminated plates can be uniformly performed through the entire area of the pressing surface.

Each of the heaters 131 may be an electric heater that receives power from an external power supply unit through a wiring and generates heat. The operation of the electric heater is controlled by an external control device (Not shown).

To this end, a cable (not shown) for receiving operating power from an external power supply device is basically wired to each heater, and wiring (or ducts) for wiring the cable is provided in each of the mold and jig.

The jigs 111 and 121 are provided with a heater temperature sensor 132 for sensing the temperature of the heater 131 for controlling the heating temperature while controlling the operation of the heater 131 and a product temperature sensor 132 for sensing the temperature of the laminated plate. (133) may be installed.

At this time, since a plurality of heaters 131 are installed on the jigs 111 and 121, a plurality of heater temperature sensors 132 may be provided, and heater temperature sensors may be installed in the same number as the number of heaters, The heater temperature sensors can be installed in a distributed manner in a space between the heaters.

Also, a plurality of the product temperature sensors 133 for sensing the temperature of the laminated sheet material may be provided, and the product temperature sensor 133 may be disposed at a position where the temperature of the laminated sheet material (product) can be sensed in the pressing surface area of the jig 121 .

As a result, when the control device controls the supply of power to each heater so that the laminated plate is heated in a prescribed temperature range after the control device receives the temperature sensed by each temperature sensor, So that heating to an appropriate temperature can be performed.

1 and 2, considering the fact that the jigs 111 and 121 of the upper mold 110 and the lower mold 120 are heated by the heater 131 in the preferred embodiment, A heat insulating material 134 may be interposed between the main body of the lower die 120 and the jigs 111 and 121. A bakelite plate may be used as the heat insulating material 134. [

When the jig is heated to a high temperature, heat transfer to the main body of the upper die and the lower die is blocked to some extent, so that the upper die and the lower die are separated from each other by the high temperature state of the jig, And the thermal influence of the main body of the lower mold can be minimized.

Next, the cooling metal mold 200 is provided with cooling means for cooling the laminated sheet material 10 in a pressurized state, and the cooling means may be a cooling water passage 231 through which the cooling water passes.

Cooling by the cooling metal mold 200 is for cooling the laminated plate material 10 in a pressurized state as described above. In particular, cooling of the laminated plate material 10 in a pressed state to form a curved surface is performed by heating the metal mold 200 ) Allows the molten adhesive to cure within a short time.

When the adhesive is cured in a pressed state so as to form a curved surface, the plate materials are integrally bonded and fixed by the cured adhesive, and the cured adhesive firmly fixes the plate materials even after demolding, So that the curved surface state of the plate members can be maintained in the defined curvature state.

The cooling water passage 231 is installed in both the top mold 210 of the cooling mold 200 and the jigs 211 and 221 of the lower mold 220 in the same manner as the heater in the heating mold. And the cooling water passages 231 are provided in the lower jigs 211 and 221. In this figure, the pressing surfaces of the jigs 211 and 221 are shown.

As shown in the figure, the cooling water passage 231 is uniformly distributed over the entire pressing surface so that uniform cooling can be performed through the entire pressing surface of the jigs 211 and 221. At this time, the plurality of cooling water passages 231 are uniformly dispersed So that it can be formed inside the jig.

Or a structure in which the entire cooling water passages are connected by a single passage, that is, the cooling water passages are arranged in a staggered configuration. In this case, the cooling water flows in a zigzag manner along the cooling water passage.

Therefore, when one cooling water passage connected over the entire area of the pressing surface of the jig is installed, while cooling water moves along the entire cooling water passage, it cools a specific part of the jig, Continue to cool down.

Accordingly, it is preferable to arrange a plurality of cooling water passages 231 in parallel to one another as illustrated in a zigzag cooling water passage having one cooling water flow path, and a plurality of cooling water passages 231 are arranged side by side at predetermined intervals .

In this case, when the cooling water is supplied through the piping by the external water supply device or the cooling water circulation device (not shown), the supplied cooling water is separately introduced into the respective cooling water passages 231 through the respective inlet ports of the jig, The divided cooling water passes through the respective cooling water passages 231 individually and is cooled and then finally discharged to the pipe through each of the outlet ports.

The number, position, and arrangement of the cooling water passages may be the same as the number of the heaters of the heating mold, and the positions and arrangement of the cooling water passages.

That is, when the jig of the heating mold is a curved jig as in the cooling mold, the jig of the heating mold and the jig of the cooling mold may be the same in basic shape, structure, and configuration.

However, there is a difference in that the heater 131 is disposed in the jig 111 of the heating mold 100 and the cooling water passage 231 is disposed in the same position in the jig 211 and 221 of the cooling metal mold 200, When the cartridge heater 131 having a long length is mounted in the machined space of the jigs 111 and 121 in accordance with the heater arrangement position and the arrangement shape shown in FIG. 4A, the jigs 111 and 121 of the heating metal mold 100 can be configured, The jigs 211 and 221 of the cooling metal mold 200 may be formed by sealing the space of the shape and making the shape of the passage through which the cooling water passes.

Of course, in the jigs 111 and 121 of the heating mold 100, there is a difference in that power supply wiring is required to be connected to operate the heater 131. In the jigs 211 and 221 of the cooling metal mold 200, 231) are connected to a hose (not shown) for supplying and discharging cooling water (piping connection).

The cooling water circulating apparatus may be applied to any apparatus having a configuration capable of supplying and circulating cooling water. Although not shown in the drawings, for example, a storage tank for storing cooling water, a pump for feeding cooling water, A radiator for cooling the cooling water, piping and valves for connecting and discharging the cooling water to and from the inlet and outlet ports of the respective cooling water passages, and the like.

An aluminum alloy or the like may be used as the material of the jig 211 or 221 in the cooling metal mold 200. The laminated plate material 10 in a high temperature state, which is heated at a high temperature in the heating metal mold 100 and thermally expanded, 200, the plate material such as the upper plate and the lower plate is abruptly reduced, resulting in excessive curvature.

Therefore, in order to solve such a problem, the pressing surfaces 211a and 221a of the jigs 211 and 221 in the upper mold 210 and the lower mold 220 of the cooling metal mold 200, that is, the jigs 211 and 221 may be additionally fixed by attaching a quenching plate 234 for preventing excessive quenching of the plate material 10.

Since the quenching preventing plate 234 has a certain degree of heat transmitted from the plate member 10 (or delays rapid heat release from the plate member to the jig) unlike the materials of the jigs 211 and 221 themselves such as aluminum alloy, It is possible to prevent excessive quenching of the plate material 10 by the jigs 211 and 221, thereby realizing the desired curvature of the product.

The quenching preventing plate 234 may be made of a material made of MC nylon (MC nylon).

As described above, the manufacturing process and the manufacturing apparatus of the present invention have been described in detail. The manufacturing process of the chassis using the manufacturing apparatus will be summarized as follows.

1, the upper plate 11, the lower plate 12 and the core 13 of the chassis are stacked as shown in Fig. 1, and between the upper plate 11 and the core 13 and between the lower plate 12 and the core 13, The adhesive sheet 14 is laminated.

Thereafter, the laminated sheet material 10 is placed on the jig 121 of the lower die 120 in the heating mold 100 and then the upper die 110 is lowered so as to be separated from the upper jig 111 and the lower die jig 121 The stacked plate material 10 is brought into a pressurized state and then the heater 131 is operated for a predetermined time to heat the laminated plate material 10 in a compressed state.

When the laminated sheet material 10 is heated in this heating process, the adhesive sheet 14 is melted by the heat supplied to the laminated sheet material 10 through the pressing surfaces 111a and 121a of the jigs 111 and 121.

The laminated sheet material 10 is then transferred from the cooling mold 200 to the jig 221 of the lower mold 220. The upper mold 110 is lifted to open the mold, The upper die 210 is lowered so that the plate material 10 stacked between the upper die jig 211 and the lower die jig 221 is pressed.

At this time, since the curved jigs 211 and 221 of the cooling metal mold 200 are pressed by the curved jigs 211 and 221, the laminated plate materials 10 are curved. In this state, the jigs 211 and 221 of the upper and lower molds 210 and 220 And the cooling water is supplied to the cooling water passage 231 to cool the laminated plates 10.

When the laminated plate 10 is cooled in the state of being pressed to form a curved surface, the melted adhesive is hardened and the upper plate 10, the lower plate 12, and the core 13 are integrally joined and fixed, The bottom plate, and the core material are firmly adhered to each other by the adhesive, and the processing of the integrated chassis is completed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. Forms are also included within the scope of the present invention.

10: laminated sheet material in which an adhesive sheet is inserted 11:
12: lower plate 13: core material
14: adhesive sheet 100: heating mold
110: image 111: jig
111a: pressure face 120: lower mold
121: Jig 121a: Pressure face
131: heater 132: heater temperature sensor
133: product temperature sensor 134: insulation
200: cooling mold 210: upper mold
220: lower mold 211: jig
221: Jig 231: Cooling water passage
234: Plate for preventing quenching

Claims (26)

A method of manufacturing a curved chassis for use in a curved display device,
Stacking a core material between an upper plate and a lower plate constituting the chassis, and inserting and laminating an adhesive between the upper plate and the core and between the core and the lower plate;
Heating the laminated plate materials in a heating mold to melt the adhesive inserted between the plate materials;
Pressing the heated laminated plate materials in a cooling mold to form a curved surface, cooling the laminated plates in a pressurized state so that the plates of the upper plate, the lower plate and the core are integrally adhered and fixed by the cured adhesive so that the curved shape is maintained;
Wherein the chassis is formed of a transparent material.
The method according to claim 1,
As a core material integrally adhered and fixed between the upper plate and the lower plate, a honeycomb core having a honeycomb shape or a molded core having an embossed shape projected on a plate or a corrugated molded core having a wavy plate shape (Corrugated Core) is used for the curved surface display device.
The method according to claim 1,
Wherein a sheet-shaped adhesive sheet is used as an adhesive to be inserted between the upper plate, the lower plate, and the core material in the lamination process.
The method of claim 3,
Wherein the adhesive sheet is an adhesive sheet made of a hot-melt adhesive.
The method of claim 3,
Wherein the adhesive sheet is a plastic adhesive sheet or a curable adhesive sheet.
The method according to claim 1,
Wherein the heating mold is provided with a heater for both upper and lower molds for pressing the laminated plate materials.
The method of claim 6,
Wherein the upper mold and the lower mold of the heating mold each include a jig for forming a pressing surface for pressing the laminated plates, and the heater is installed on each jig of the upper mold and the lower mold.
The method of claim 7,
Wherein a plurality of heaters are installed on the jig so as to be distributed over the entire area of the pressing surface.
The method according to claim 1,
Wherein the cooling metal mold is provided with cooling means for both the upper and lower molds for pressing the laminated plate materials in a curved shape.
The method of claim 9,
Wherein the upper and lower molds of the cooling metal mold each include a curved pressure jig for forming a pressing surface of a curved surface that presses the plate members in the laminated state respectively, and cooling means is provided on each pressing jig of the upper and lower molds A method of manufacturing a chassis for a display device.
The method according to claim 9 or 10,
Wherein the cooling means of the cooling mold is a cooling water passage formed so as to allow cooling water to pass therethrough.
The method of claim 10,
Wherein the cooling means includes a plurality of cooling water passages formed in the pressure jig so as to be distributed over the entire pressing surface area.
An apparatus for manufacturing a curved chassis used in a curved display device,
A heating mold having a heater interposed between the upper plate and the core and between the lower plate and the core to heat the laminated plates to dissolve the adhesive;
A cooling mold having a curved pressing jig for pressing the heated laminated plate materials into a curved surface and having cooling means for cooling the pressing plates in the curved pressing jig;
Wherein the curved surfaces of the upper plate, the lower plate, and the core are integrally adhered and fixed by a cured adhesive so that the curved surface shape is maintained in the cooling mold.
14. The method of claim 13,
Wherein the heating mold is provided with a heater for both upper and lower molds for pressing the laminated plate materials.
15. The method of claim 14,
Wherein the upper mold and the lower mold of the heating mold each include a jig for forming a pressing surface for pressing the plate members in the laminated state and a heater is installed in each jig of the upper mold and the lower mold.
16. The method of claim 15,
Wherein the upper and lower dies are each formed by mounting the jig to the body, and a heat insulating material is interposed between the body and each jig.
16. The method of claim 15,
Wherein a plurality of heaters are installed on the jigs so as to be distributed over the entire area of the pressing surface.
The method according to claim 15 or claim 17,
Wherein a plurality of heaters are arranged on the jigs so as to be spaced a predetermined distance apart from each other in the entire area of the pressing surface.
16. The method of claim 15,
Wherein each of the jigs of the heating die has a pressing surface formed in a flat or curved shape.
14. The method of claim 13,
Wherein the cooling metal mold is provided with cooling means for the upper and lower molds for pressing the laminated plate materials in a curved shape, respectively.
The method of claim 20,
Wherein the upper and lower molds of the cooling metal mold each include a curved pressure jig for forming a pressing surface of a curved surface that presses the plate members in the laminated state respectively and a cooling means is provided for each pressing jig for the upper and lower molds, A device for manufacturing a chassis for a device.
The method of claim 13, 20, or 21,
Wherein the cooling means of the cooling mold is a cooling water passage formed so as to allow cooling water to pass therethrough.
23. The method of claim 21,
Wherein the cooling means comprises a plurality of cooling water passages formed inside the jig so as to be distributed over the entire area of the pressing surface.
The method of claim 21 or 23,
Wherein the cooling means comprises a plurality of cooling water passages arranged in parallel within the jig at predetermined intervals over the entire area of the pressing surface.
23. The method of claim 21,
And a plate for preventing quenching from being excessively quenched while being in contact with the plate is additionally provided on the pressing surface for pressing the plates in the jig.
26. The method of claim 25,
Wherein the quenching preventing plate is a plate made of MC nylon material.

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