KR100761237B1 - Multi core mold and press method for display device using dual core mold - Google Patents

Abstract

A multi core mold which can secure price competitiveness of the products through the improvement of productivity by realizing a system that can simultaneously produce various products from scrap generated during the production of products by one mold or one set of molds, and a method for fabricating a display device using the same are provided. In a mold for fabricating a display device, a multi core mold comprises: an upper mold block(10) having an upper main mold(11) for forming a first product and an upper sub mold which is formed in a central part of the upper main mold to form a second product; and a lower mold block(13) having a lower main mold(14) and a lower sub mold(15) that correspond to the upper main mold and the upper sub mold respectively such that one set of molds can form a first product and a second product at the same time. The upper sub mold and the lower sub mold are respectively assembled into the upper main mold and the lower main mold as removable cores. The upper sub mold and the lower sub mold include a plurality of circular blocks and a plurality of adjusting pin holes formed therein.

Description

Multi core mold and display device manufacturing method using same {Multi core mold and press method for display device using dual core mold}

1 is a perspective view showing a multi-core mold according to an embodiment of the present invention

2 is a perspective view showing a coupling of the upper mold of the multi-core mold according to an embodiment of the present invention

3 is an exploded perspective view of FIG.

4 is a perspective view showing a lower mold of the multi-core mold according to an embodiment of the present invention

5 is an exploded perspective view of FIG.

Figure 6 is a schematic diagram showing the overall process of manufacturing a display device using a multi-core mold according to an embodiment of the present invention

7A, 7B, 7C, 7D, 7E, and 7F are schematic diagrams showing respective detailed processes of manufacturing a display apparatus using a multi-core mold according to an embodiment of the present invention.

8 is a schematic diagram showing a general display device manufacturing process

<Description of the symbols for the main parts of the drawings>

10: upper mold mold 11: upper mold main mold

12: upper mold submold 13: lower mold mold block

14: lower mold main mold 15: lower mold sub mold

16: circular block 17: dowel pin hole

18: holder 19a, 19b: block seat

20: first product 21: second product

22: raw material 23: scrap

The present invention relates to a multi-core mold and a display device manufacturing method using the same, and more particularly, to implement a system that can produce several products at the same time in a set of molds to recycle the scrap generated during the production of the product In the multi-core mold and display device manufacturing method using the same, in particular, by applying a mold of a detachable core method for a product produced at the same time, only a desired product can be produced if necessary. It is about.

In general, with the recent development of information processing apparatuses, the demand for display devices (image display apparatuses or image display apparatuses) serving as interfaces between users and information processing apparatuses is rapidly increasing.

In particular, the development of high-definition television (High Definition Television) is part of the development, and the improvement of this problem continues to study the importance of the display device.

Types of such display devices are known, such as color cathode ray tube (CRT), liquid crystal display (LCD), fluorescent display (VFD), plasma display device (PDP) and the like.

However, as a display element satisfactory in relation to the development of high-definition television, which has not been technically completed yet, such display devices have been developed while maintaining mutually complementary relations at different positions.

Among the display devices described above, the liquid crystal display device and the plasma display device, which have recently been improved in performance, will be described.

First, the liquid crystal display device displays information by using the electrical and optical properties of the liquid crystal material injected into the liquid crystal display panel. In recent years, a portable video camera and a digital camera are used as monitors and image display devices of televisions and computers. Increasingly, applied fields such as automobile navigation devices, various information devices, and communication devices are gradually expanding.

The liquid crystal display device as described above requires a liquid crystal display panel assembly that receives an image signal from the information processing device and converts the signal into a liquid crystal control signal and then controls the amount of light transmitted through the liquid crystal to visually recognize the electrical image signal. Shall be.

The liquid crystal display panel assembly is again connected to 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 the liquid crystal display panel and the printed circuit board are interconnected. It includes a flexible circuit board to reduce the planar area of the.

In addition, since the liquid crystal display uses liquid crystal, which is a light-receiving element that does not emit light by itself, in addition to the liquid crystal display panel assembly, a backlight assembly which is installed on the lower surface of the liquid crystal display panel assembly and provides light to the liquid crystal display panel assembly is required. Done.

The above components are housed in a case for protection and fixation from external impact, and the bottom of the case sequentially receives the components of the backlight assembly, and above the liquid crystal display panel assembly.

Next, the plasma display apparatus displays an image on a plasma display panel (PDP) using a plasma generated by gas discharge. After the gas is sealed between two electrodes installed in an enclosed space, A discharge voltage is applied and the phosphor layer formed in a predetermined pattern is excited using ultraviolet rays generated due to the discharge voltage to obtain a desired number, letter or image.

Such a plasma display device basically includes a PDP, a chassis base disposed substantially parallel to the PDP, a thermally conductive medium interposed between the PDP and the chassis base and closely attached to the PDP and the chassis base, and the panel of the chassis base attached thereto. And a driving circuit mounted on the side opposite to the surface and connected to the PDP to drive the PDP. A front case is coupled to the PDP side, and a back case is coupled to the driving circuit side.

The plasma display device has the most promising resolution and illuminance ratio in this field, and is not only fast in response, but also suitable for displaying a large area image, and is widely used in televisions, monitors, indoor and outdoor display panels, and the like. have.

On the other hand, the liquid crystal display and the plasma display device both chassis is coupled to the case (chassis) in order to prevent the display panel assembly, which is simply seated on the case is separated from the outside.

The chassis (also referred to as a frame) is installed to support the outside of the display panel assembly. The chassis is divided into a chassis top and a chassis bottom according to the front and rear positions of the display panel assembly, and is made of a metal material such as aluminum alloy or stainless steel (SUS). Is produced.

The chassis used in the liquid crystal display and the plasma display device have only a difference in size, and there is no big difference in the overall shape.

As shown in FIG. 8, the chassis is formed by forming a metal plate through a pressing process to form a quadrangle having an upper surface and four sides, and a center portion corresponding to the effective display area of the display panel on the upper surface of the chassis. Is cut into squares to form a large square hole.

In general, in order to manufacture the chassis of the shape as described above must go through a multi-stage press line 100, first cut the metal disc to a predetermined size and shape, the overall cut to have a rectangular shape, the compound mold It is processed by cutting out appearance and some holes at the same time.

Next, mark the position on the plate as a reference for post-processing, piercing to process small holes as needed, embossing to make local protrusions, Z bending, burring, Further processing such as slitting and engraving are performed.

Then, as a process of forming the sides along the four sides of the plate, the box bending (bending) bending the four sides of the plate in a 'b' shape by a certain width, so that the plate is the upper surface and four sides It consists of.

After the box bending to form the side as described above, in order to form a square hole in the center of the upper surface of the chassis, the center of the upper surface of the chassis mounted on the piercing die (lower type) is opened with a piercing punch (upper type). Done.

After all the molding process is completed as described above, all the manufacturing process of the chassis is completed through the washing line 200 and the assembly line 300.

Here, reference numeral 400 denotes an uncoiler for material supply, and 500 denotes a conveyor for product transfer.

However, in the case of such a chassis manufacturing process, the press line cuts the center portion of the chassis into a rectangular shape to form a large square hole. In this case, waste of material is severe because the scrap generated inside is discarded as it is. However, there are disadvantages in terms of efficient use of the material because there are more discarded parts than the parts used as actual products.

Accordingly, the present invention has been made in view of the above, and by implementing a system capable of simultaneously producing several products in one mold or a set of molds using a script generated during product production, Correspondingly, an object of the present invention is to provide a multi-core mold and a display device manufacturing method using the same, which can secure a price competitiveness according to productivity improvement.

In addition, another object of the present invention is to implement a new production system by applying a detachable core mold for the products produced at the same time in the production system using scrap, so that only the desired products can be produced by the customer if necessary It is to provide a multi-core mold and a display device manufacturing method using the same to maximize the production efficiency.

In the multi-core mold of the present invention for achieving the above object, in the mold for manufacturing a display device, the upper mold block is provided with an upper mold main mold for molding the first product and at the same time a second product in the center of the upper mold main mold. An upper mold sub mold for forming a mold is provided, while a lower mold mold includes a lower mold main mold and a lower mold sub mold paired with the upper mold and the upper mold, respectively. Characterized in that it can be molded at the same time and the second product.

In addition, the upper mold and the lower mold sub-mold is characterized in that assembled to the upper main mold and the lower main mold in a removable core method.

In addition, the upper mold and the lower mold sub-mold is characterized in that it comprises a plurality of circular blocks as a reference when assembling the upper mold and the lower mold main mold, respectively.

In addition, the upper mold and the lower mold sub-mold is characterized in that it comprises a plurality of dowel pin holes that can be aligned with each other up and down.

In addition, the upper mold and the lower mold sub-mold is characterized in that it is provided with a separate holder so as to separately produce the product only by its own mold without being assembled to the main mold.

In addition, the upper and lower main mold is characterized in that the mold for manufacturing the chassis of the display device.

In addition, the upper and lower sub-mold is characterized in that the mold for manufacturing the shield control or cover back of the display device.

On the other hand, a display device manufacturing method using a multi-core mold of the present invention for achieving the above object is a method for manufacturing a display device using a mold, the first product and the second in a set of molds consisting of the upper and lower molds The main mold and the sub-mold for molding the product is placed and combined inside and outside, respectively, so that the first product and the second product can be simultaneously formed in a set of molds.

In addition, assembling the sub-mold disposed in the inner center of the main mold in a removable core method to combine the main mold and the sub-mold together as needed to manufacture the first and second products at the same time, or after removing the sub-mold Characterized in that the first product can be manufactured only by the main mold.

In addition, after removing the sub-mold from the main mold, it is characterized in that to produce a second product by using only the sub-mold itself.

In addition, the first product molded by the main mold is characterized in that the chassis of the display device.

In addition, the second product to be molded by the sub-mold includes a press of the display device, characterized in that it comprises a chassis top, bottom, back, shield control of different inches.

Hereinafter, a multi-core mold and a display apparatus manufacturing method using the same according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a multi-core mold according to an embodiment of the present invention, Figure 2 is a perspective view showing a coupling of the multi-core mold according to an embodiment of the present invention, Figure 3 is an exploded view of Figure 2 4 is a perspective view illustrating a lower mold of a multi-core mold according to an exemplary embodiment of the present invention, and FIG. 5 is an exploded perspective view of FIG. 4.

As shown in Figs. 1 to 5, the multi-core mold includes a well-known upper and lower mold blocks 10 and 13 installed in a press equipment, and the upper and lower mold blocks 10 and 13 are known. The upper and lower main molds 11 and 14 and the upper and lower sub molds 12 and 15 respectively provided on the upper side are included.

Such a multi-core mold can simultaneously mold a first product such as a main product, such as a chassis, and a second product such as a shield product, which is a sub-product. In particular, the multi-core mold can be used to form a second product by utilizing a scrap portion generated during molding of the first product. It can be characterized.

That is, when press-molding the chassis of the rectangular frame form, the center portion of the raw material is left as scrap. By utilizing the scrap at this time, it is possible to mold a product such as a shield control, thereby minimizing the loss of the raw material.

To this end, the upper mold main mold 11 and lower mold main mold 14 is a part for forming a first product such as a chassis, etc., wherein the mold is pierced except for the basic rectangular outline assembled in the mold block. It may have various cavity shapes for bending and the like process.

For example, in the six-stage process, 1 / 6th and 2 / 6th molds for notching the first and second products, 3/6 for the box piercing and box bending processes of the first and second products 4th / 6th mold for box bending and opening process of primary mold, 1st product and 2nd product, 5th / 6th mold for opening and chamfer / four corner cutting process of 1st and 2nd mold, It may have the form of the 6/6 mold for the chamfer process of the first product.

That is, the shape of the main mold applied to each of the six-step press process to be described later may be different from each other due to the characteristics of each process, and the design method of each of these types of molds is a method commonly known in the art. It is not particularly limited and may be adopted.

The upper and lower main molds 11 and 14 may be assembled on the upper and lower mold blocks 10 and 13 in a known manner to perform a press operation for forming a chassis or the like together with the mold block.

The upper mold sub mold 12 and the lower mold sub mold 15 are parts for molding a second product such as a shield control and the like, and have an empty space secured on the center of the upper and lower main molds 11 and 14. Area), i.e., in the hollow portion which is not involved in forming the first product.

In this case, as in the case of the main mold, the shape of the sub mold may be different from each other according to the characteristics of each process.

The upper and lower sub molds 12 and 15 may be integrally formed on the upper and lower main molds 11 and 14, or may be detachable in the form of a core mold, that is, inserted into and removed from the center portion. Can be assembled.

In particular, in the present invention, by configuring the upper and lower sub molds 12 and 15 in a form that can be replaced from the upper and lower main molds 11 and 14, various advantages, for example, of a product molded into a sub mold Advantages of securing a variety of types, advantages of molding a product with only a main mold without sub molds, and advantages of molding a product with a sub mold alone are provided.

As a result, the replaceable characteristics of the sub-molds can reduce unnecessary uptime in the event of a shortage of one product, and it does not require much time for disassembly and assembly due to the simplification of the mold structure. It can have advantages such as being able to produce.

The upper mold sub mold 12 and the lower mold sub mold 15 are assembled to the upper mold main mold 11 and the lower mold main mold 14, respectively, and at least four circular blocks 16 as a reference for assembly at this time are used. do.

For example, in the case of a replaceable sub-mold, a large rectangular hole is formed in a central portion of the main mold, and the sub-mold is located there, where the four sides of the mold face each other. The semicircular block mounting portions 19a and 19b are formed in each of the circular blocks 16, and the circular blocks 16 are fitted into the block mounting portions 19a and 19b which coincide with each other when forming the mold and form one circle. Since it is fastened in the form, it is possible to easily hold the standard when assembling the mold by the circular block fastened in this four places.

In this way, the sub-mould having the standard at the time of assembly through the circular block 16 may be finally fixed and assembled by fastening a plurality of pins and bolts on the mold block side.

In addition, the upper and lower sub molds 12 and 15 are provided with a plurality of dowel pin holes 17 which can be aligned up and down in the mold itself.

For example, in the case of a sub-mold, it is usually composed of one assembly formed by stacking about four plates, each of which is integrated by a dowel pin (not shown) that is stacked in turn and then fitted in a dowel pin hole. It can be combined while positioning, and the sub mold in the form of assembly in this combined state can be assembled on the main mold.

In addition, when the upper and lower sub molds 12 and 15 are replaceable, separate holders 18 may be detachably provided to produce the second product using only the sub mold.

For example, a second product such as shield control may be separately produced using a sub mold in a six-step robot mold or a six-step transfer mold method.

That is, when the chassis or the shield control is produced together, the sub mold is removed from the main press facility including the main mold when the production request for the shield control only is performed. And the transfer mold is set in a separate press facility and operated, so that only the shield control can be produced separately.

In this case, the raw material of the roll type may be used in the production of the second product alone using the sub mold, or scrap generated when only the first product is produced may be used.

6 is a schematic view showing an overall process of manufacturing a display apparatus using a multi-core mold according to an embodiment of the present invention, and FIGS. 7A to 7F are diagrams illustrating a multi-core mold according to an embodiment of the present invention. Schematic diagram showing each detailed process of manufacturing a display device, where a 24 "chassis top and a 24" shield control are simultaneously manufactured, reference numerals 20 and 21 denote a first product (chassis) and a second product. (Shield control) is shown, respectively, and 22 and 23 are raw materials and a scrap, respectively.

In the 1/6 process, compound and gauge foundation piercing operations are performed on the chassis, and notching operations on the shield control are performed.

In the 2/6 process, the chassis performs square piercing, Ø piercing, engraving and outer chamfering, and for shield control, notching and embossing.

In the 3/6 process, the chassis performs Z-B / D and lancing and chamfering, and in the case of shield control, L-B / D and Ø piercing and engraving.

In the 4/6 process, box bending is performed for each chassis and shield control.

In the 5/6 process, the opening is carried out for the chassis and the parting work for the shield control.

In the 6/6 process, chamber operation is performed on the chassis.

In one embodiment of the present invention, an example of manufacturing two products using a multi-core mold, that is, a 24 "chassis top and a 24" shield control, was described. In addition, a 17 "chassis top, a 15.4" cover bag, and a 15.4 "chassis were described. It is also possible to manufacture products such as tops, 3.5 "chassis tops, 3.5" chassis tops and 1.82 "bottoms.

As described above, in the case of the multi-core mold provided in the present invention and the manufacturing method using the same, two or more products can be produced at the same time, so that the production efficiency and facility utilization are high (for example, the shield control production quantity is equal to the chassis production quantity). Can be secured at the same time, and by using the replaceable properties of the sub-mold, only one product can be produced if necessary, thus eliminating unnecessary inventory), and the yield of raw materials can be increased by increasing utilization of raw materials and scrap. have.

As described above, the multi-core mold provided in the present invention and a display device manufacturing method using the same have the following advantages.

First, it is possible to produce several products at the same time in one mold or a set of molds to improve productivity.

Second, there is an effect that can reduce the mold cost by manufacturing only the core as needed.

Third, the core can be detached and produced at the same time the product can be produced if desired by the customer can increase the production efficiency.

Fourth, due to the standardization of the core mold, only a core can be replaced to produce various kinds of products.

Fifth, the core mold may be removed and the product may be produced using only the main mold, or the core mold may be produced along with the product.

As a result, it is possible to increase productivity by minimizing the loss of raw materials, thereby securing price competitiveness.

Claims (12)

In the mold for manufacturing a display device, The upper mold block 10 is provided with an upper mold main mold 11 for molding the first product, and an upper mold sub mold 12 for molding the second product is provided at the center of the upper mold main mold 11. On the other hand, the lower mold block 13 is provided with a lower mold main mold 14 and a lower mold sub mold 15 which are paired up and down with the upper mold main mold 11 and the upper mold sub mold 12, respectively. The multi-core mold, characterized in that the first product and the second product can be molded at the same time. The multi-core mold according to claim 1, wherein the upper mold sub mold (12) and the lower mold sub mold (15) are assembled to the upper mold main mold (11) and the lower mold main mold (14) in a detachable core manner. Claim 3 was abandoned when the setup registration fee was paid. The upper mold sub mold 12 and the lower mold sub mold 15 have a plurality of circular blocks 16 as a reference when assembling the upper mold main mold 11 and the lower mold main mold 14. Each of the multi-core mold, characterized in that it comprises. Claim 4 was abandoned when the registration fee was paid. The multi-core mold (1) according to claim 1 or 2, characterized in that the upper mold (12) and the lower mold (15) comprise a plurality of dowel pin holes (17) which can be aligned above and below each other. Claim 5 was abandoned upon payment of a set-up fee. The upper mold sub mold 12 and the lower mold sub mold 15 are provided with separate holders 18 so as not to be assembled to the main mold but to produce products separately using only their own molds. Multi-core mould. Claim 6 was abandoned when the registration fee was paid. The multi-core mold according to claim 1 or 2, wherein the upper and lower main molds (11) and (14) are molds for manufacturing a chassis of the display device. Claim 7 was abandoned upon payment of a set-up fee. The multi-core mold according to claim 1 or 2, wherein the upper and lower sub molds (12) and (15) are molds for manufacturing a shield control or a cover back of a display device. In the method for manufacturing a display device using a mold, The main mold and the sub mold for forming the first product and the second product in a set of upper and lower molds are arranged in and out, respectively, to form the first and second products simultaneously in a set of molds. Display device manufacturing method using a multi-core mold, characterized in that to enable. The method according to claim 8, wherein the sub-mold disposed in the inner center of the main mold is assembled in a detachable core manner, whereby the main mold and the sub-mold are combined together to manufacture the first product and the second product at the same time, or Method of manufacturing a display device using a multi-core mold, characterized in that the first product can be manufactured only by the main mold after removing the mold. Claim 10 was abandoned upon payment of a setup registration fee. The method of manufacturing a display apparatus using a multi-core mold according to claim 8 or 9, wherein after removing the sub mold from the main mold, the second product can be separately produced using only the sub mold itself. Claim 11 was abandoned upon payment of a setup registration fee. The method according to claim 8 or 9, wherein the first product molded by the main mold is a chassis of a display device. Claim 12 was abandoned upon payment of a registration fee. 10. The multi-core of claim 8 or 9, wherein the second product molded by the sub-mold includes a press of the display device, and includes a chassis top, a bottom, a bag, and a shield control of different inches. Display device manufacturing method using a mold.

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