KR101989475B1 - Back cover corner banding device for display - Google Patents

Abstract

The present invention relates to a bending apparatus for a corner portion, which forms a wall on a corner portion of a back cover for a display. The bending apparatus adds a bending means which forms the wall and forms a basic curing slope portion on the end of the wall at the same time, thereby capable of performing more stable operation than a curing process which is a post-process.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a back cover corner banding device for display,

The present invention relates to an edge bending apparatus for a display back cover, and more particularly, to a corner bending apparatus for forming a wall in an edge portion of a back cover for a display, The present invention relates to a banding device for simultaneously forming a base curling slope part so that a curling part can be formed quickly and accurately at the end of a wall in a later step.

BACKGROUND OF THE INVENTION [0002] In general, a display back cover (hereinafter, abbreviated as a 'back cover') is a metal material having a rectangular shape and a peripheral wall bent in one direction to form a curling portion, It is made to stand out the stable acceptance of the electronic device and the beauty of the appearance.

Hereinafter, a manufacturing process of the display back cover will be briefly described. A trimming process is performed to obtain a back cover by cutting the back cover in a size and a square shape suitable for the display device. The back cover is folded in one direction to form a bending (See Fig. 8 (a)) -> a curling step (see Fig. 8 (b)) in which the end of the wall is formed by a round curling portion.

Further, when the metal panel is trimmed in the trimming process to obtain the back cover, a base curling inclined portion is provided around the back cover to facilitate the curling of the end of the wall in the curling process as a later process. 8)

For reference, the base curling inclined portion around the back cover formed in the trimming process forms a step having a predetermined depth around the upper portion of the lower cutting metal mold so that the upper cutting metal is in contact with the lower cutting metal The outer periphery of the back cover is bent at a predetermined inclination angle with the groove of the step, and then cut.

Further, the bending process may be performed by using a fixed lower mold (c), a plurality of straight straight bending molds (a) and a straight bending mold (a) (b1).

In this case, when the fixed bottom metal mold (c) is formed into a wall by forming the avoidance groove (c1) at the center position of the outer periphery of the stationary lower mold (c) So that the inclined portion is located in the avoidance groove (c1) to be avoided.

In the process of manufacturing the back cover according to the present invention, it is very difficult to form the curling portion at the end of the wall formed at the corner portion of the back cover in the last process of curling, There has been a problem that could lead to failure.

As shown in FIG. 8, conventionally, the trimming process has been used to cut the metal panel into a square shape and each corner portion into a round shape to obtain a back cover, and at the same time, a base curling slope portion 202 is formed on the outer periphery of the back cover, In the curling process,

In this case, when the wall cover 201 is formed by unidirectionally bending the outer periphery of the back cover 200 obtained in the upper trimming process in the bending process, the base curling slope portion (not shown) formed in the outer circumferential straight section of the back cover 200 202), there is no change in shape due to linear bending. However, when the rounded corner section is unidirectionally bent, the cohesion of the physical properties due to the shape change occurs, so that the base curling slope of the position is unfolded linearly, A deformation occurs at an opposite angle (outward in the drawing). It has been pointed out that when the curling process is performed to the wall end of the edge section in the post-curling process, it is difficult to accurately form the curling portion 203 due to the defective shape of the basic curling slant 202, resulting in a large number of defects .

Korea Utility Model Registration No. 20-0158219

The present invention has been devised in order to solve the above-mentioned conventional problems, and in particular, the present invention is an edge bending apparatus for forming (bending) a wall in an edge portion of a back cover, And a bending means for simultaneously forming a curling slope portion is added to the curling portion so that the wall end can be formed into a curling portion with a swift / accurate curl in the curling process as a post-process.

The edge bending apparatus for a display back cover according to the present invention, which is presented as a means for solving the above problems, is positioned at each corner of a stationary lower mold (c) of a display back cover bending apparatus and operates as a lift device, In an edge portion bending mold (b) having a configuration in which the end portions (b1) and (b2) are formed orthogonally and a curvature portion (b3) is provided at the intersection center of the straight end portion (b1) and the straight end portion (b2)

The bending means (1) is formed inside the corner bending die (b)

The corner bending die b can form the wall 201 at the corner of the back cover 200 and simultaneously form the base curling slant 202 at the end of the wall 201 However,

The bending means (1) comprises a vertical guide hole (11) formed in the vertical direction inside the edge bending mold (b)

(2) having an upper inclined surface (21) which is fixedly installed at one side of a corner portion of the stationary lower mold (c) and is drawn into the vertical guide hole (11)

A horizontal guide hole 12 formed in an inner horizontal direction of the edge bending mold b and having one side connected to the vertical guide hole 11,

And a curved portion b3 of the corner bending die b is formed in the horizontal guide hole 12 at one end thereof and an inclined surface 31 corresponding to the inclined surface 21 of the plunger 2, The bending bar 3 having the curvature bent portion 32 having the same curvature bent portion 32 as that of the curved bent portion 32 has an oblique angle from top to bottom,

A stopper mounting hole 13 formed at an upper center position of the horizontal guide hole 12,

And the stopper 4 is configured to be positioned in the stopper mounting hole 13 so that the upper portion of the stopper 4 elastically presses the spring 41 and the lower portion thereof presses the upper surface of the bend bar 3 provided in the horizontal guide hole 12. [ .

According to the present invention, the bending unit is added to the back cover corner bending die to form a wall on the corner of the back cover, and a base curling slope is formed at the end of the wall, So that the wall end of the wall portion can be quickly and accurately formed as a curling portion.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an overall schematic view of an edge bending apparatus of a back cover in which the present invention is used; Fig.
FIG. 2 is a schematic view of a corner bending die of a corner bending apparatus of a back cover to which the present invention is applied,
3 is a partial exploded view of an edge portion bending mold to which the present invention is applied;
Fig. 4 is an embodiment of the present invention in which a cross-section is taken along the line II-II '
5 is an enlarged view of "
FIG. 6 is an enlarged view of the 'I'
7 is a partially enlarged cross-sectional view showing the operating state of the stopper and the bending bar according to the present invention,
8 is a schematic view showing a conventional back cover manufacturing process.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

In the following description, the description of well-known technologies which are deemed to blur the gist of the present invention will be simplified or omitted, and the same names will be unified into one code.

Briefly, the present invention relates to a method of manufacturing a multi-linear bending mold a ("a") which is operated by a lifting device (not shown) and which is positioned above the stationary lower mold c, And a plurality of corner bending dies (b) formed at corner positions between the straight bending dies (a) and the straight bending dies (a), wherein the edge bending And an edge bending apparatus using the mold (b).

* For reference, a conventional back cover bending apparatus for a display is a trimming process for obtaining a back cover by cutting it into a size and a square shape suitable for a display device, a bending process for forming a wall by bending a square outer periphery of the back cover in one direction, And a curling step of forming an end of the wall by a round curling portion, the present invention is used in the bending process.

The detailed configuration of the present invention will be described with reference to the above description.

As shown in Fig. 3.4, both side linear end portions b1 and b2 are formed to be orthogonal to each other at the same time as being operated in the elevation device and positioned at each corner portion of the fixed lower mold c of the display back cover bending device, In a conventional edge portion bending mold (b) having a curvature portion (b3) at the intersection center of the end portion (b1) and the straight end portion (b2)

The corner bending die b forms the wall 201 in the corner portion of the back cover 200 and the wall 201 is formed in the corner bending die b, And the base curling slant portion 202 is formed at an end of the base curling slant portion 202,

The bending means (1) comprises a vertical guide hole (11) formed in the vertical direction inside the edge bending mold (b)

And a plunger (2) having an upper inclined surface (21) which is fixed to one side of the corner of the fixed lower mold (c) and into which the upper part is drawn in the vertical guide hole (11).

Here, the plunger 2 is constituted in a usual fixed body (not shown) provided with the fixed lower die c and is positioned at a constant interval in the corner of the fixed lower die c.

The bending unit 1 includes a horizontal guide hole 12 formed in an inner horizontal direction of the corner bending die b and having one side connected to the vertical guide hole 11, One end thereof is formed by the inclined surface 31 corresponding to the inclined surface 21 of the plunger 2 and the other end is provided with the curved bent portion 32 which is the same as the curved portion b3 of the corner portion bending mold b And the bend bar 3 has a curved bent portion 32 having an inclination angle from top to bottom.

4, the horizontal guide hole 12 is formed in a horizontal line orthogonal to the horizontal guide hole 11, and the straight guide portions b1 and b2 are formed on one side of the edge bending mold b, To the curvature portion b3.

The bending means 1 includes a stopper mounting hole 13 formed at a position above the center of the horizontal guide hole 12 and a stopper mounting hole 13 located in the stopper mounting hole 13 to elastically press the spring 41 upward, And a stopper (4) configured to be positioned in an engaging groove (33) of the upper surface of the bending bar (3) provided in the guide hole (12).

In the meantime, the present invention is characterized in that the lower portion of the stopper 4 is formed by a predetermined pressing inclined surface 42 and the engaging groove 33 of the upper surface of the bending stand 3 is formed as a tilted inclined surface (34) so that the bending bar (3) can be restored by the pressing force of the stopper (4).

Hereinafter, the detailed configuration of the present invention has been described, and an embodiment of the present invention will be described below.

When a plurality of straight bending dies and corner bending dies in one of the above-described back cover manufacturing processes are used to unidirectionally bend the outer periphery of the back cover to form a wall, the edge bending apparatus of the present invention includes (A) to (c) as shown in FIG. 4 to form the wall 201 with the edge of the back cover, while simultaneously forming the base curling slant 202 at the end of the wall.

The present invention will now be described in more detail with reference to FIGS. 4 (a) to 4 (c), which are shown step-by-step using the cross-sectional view of FIG.

4 (a) shows a state in which a back cover 200 cut in a rectangular shape (each corner is cut to have a curvature) is placed on an upper portion of a fixed lower mold c to perform a bending process Fig.

The bending die 3 is positioned at one side of the horizontal guide hole 12 in the edge bending die b in the standby state of the initial bending process so that the edge bending die b is moved to the stationary lower die c It is possible to avoid interference of the bending bar 3 with the corner bending die c when the bending die 3 is lowered (bending operation). (The positional description of the bending bar will be described in detail in the operation description of the stopper to be described later.)

4 (b), the corner bending die b is lowered by the normal construction / method to the fixed lower mold c to bend the corner portion of the back cover 200 downward to form the wall 201 ) Of the substrate.

The straight side ends b1 and b2 of the edge bending mold b are bent in one direction at both ends of the straight portion of the back cover 200 and at the same time the straight portions b1 and b2 between the straight end portion b1 and the straight end portion b2

The curved portion b3 bends the corner of the back cover 200 in the same direction to form the wall 201. [ (For reference, straight bending mold is responsible for the straight part of the back cover.)

4C shows a state in which the edge bending mold b has been bent by the bending means formed inside the edge bending mold b when the edge bending mold b has completed the formation of the wall 201 with the edge of the back cover 200. [ (1) is a sectional view of the step of bending the end of the wall body 201 formed at the corner of the back cover 200 at a predetermined inclination angle in one direction to simultaneously form the base curling slant 202.

When the corner bending die b is lowered by a length sufficient to form the wall 201 by the edge of the back cover 200 as in the above drawing,

And the bending section 3 formed in the vertical guide hole 11 in the lower guide 92 and at the same time the inclined face 21 on the upper part 2 and the horizontal guide hole 12 in the corner part bending mold) The bending bar 3 is pushed in one direction (in the direction of the edge of the fixed lower mold in the figure) while the one side slope 31 is in close contact with the other side of the curved bending portion 32, The lower end of the wall 201 of the corner portion 200 is bent in one direction so that the base curling slant portion 200 is formed.

At this time, the avoidance groove c1, which is usually formed at a predetermined depth, is provided on the lower outer periphery of the corner portion of the fixed bottom metal mold c, so that the curved bent portion 32 of the bending stand 3 c1 and the end of the wall 201 of the corner of the back cover 200 is bent at a predetermined angle therebetween.

When the corner bending mold b is returned to its original position, the bending bar 3, which has been pushed by the bushing 2, is lifted up by the upper rises of the edge bending mold b, The connection between the mutually oblique surfaces 21 and 31 is released, and at the same time, the stopper 4 returns to the original position in the state of Fig.

In other words, the stopper 4 provided in the stopper mounting hole 13 of the corner bending die b presses the bending stand 3, and the spring 41 is sprung upward and the lower portion is pressed And an inclined surface 31.

The bending bar 3 has an engagement groove 33 having a predetermined length at the center of the upper portion thereof and a protruding inclined surface 34 corresponding to the pressurized inclined surface 42 of the stopper 4 in the engagement groove 33 Have.

Therefore, the stopper 4 having the elastic force by the spring is positioned such that its lower pressing inclined surface 42 is located in the engaging groove 33 of the bending stand 3, When the edge bending mold b is in its original position raised after the bending bar 3 is moved to the position shown in Fig. 4 (b), the spring 41 is moved downward The stopper 4 exhibiting the pressing force is pushed in the reverse direction (in the direction of the pushing position in the figure) of the inclined inclined face 34 of the bending stand 3 by the lower pressurized inclined face 42 to the initial bending stage 3 position And return to the original state.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that many modifications and variations can be made in the present invention without departing from the spirit or scope of the appended claims. Accordingly, all such appropriate changes and modifications and equivalents may be resorted to, falling within the scope of the invention.

a: Straight bending mold b: Corner bending mold
b1, b2: straight line end portion b3: curvature portion
c: fixed lower mold c1: avoiding groove
101: Back cover bending device 200: Back cover
201: wall 202: basic curling slope part
203: curling portion 1: bending means
11: vertical guide ball 12: horizontal guide ball
13: Stopper mounting ball 2: Pusher
21: slope 3:
31: sloped surface 32: curvature bent portion
33: Retaining groove 34:
4: stopper 41: spring
42: Pressurized inclined surface

Claims (2)

(B1) and (b2) are formed at right angles to each other at the same time, and the rectilinear end portion (b1) and the straight end portion (b1) of the display back cover bending device b2) having a curvature portion (b3) at the center of the intersection, characterized in that: in the corner portion bending mold (b)
The corner bending die b forms the wall 201 in the corner portion of the back cover 200 and the wall 201 is formed in the corner bending die b, The base curling slope portion 202 can be formed at the same time,
The bending means 1 includes a vertical guide hole 11 formed in an inner vertical direction of the corner bending mold b and a vertical guide hole 11 fixed to one side of the corner of the fixed lower mold c, A horizontal guide hole 12 formed in the inner horizontal direction of the corner portion bending mold b and having one side connected to the vertical guide hole 11; And one end of the inclined surface 31 corresponds to the inclined surface 21 of the plunger 2 and the other end of the inclined surface 31 corresponds to the curved portion b3 of the corner bending die b The bending bar 3 having the curvature bent portion 32 having the same curvature bent portion 32 as that of the curved bent portion 32 and having the inclined angle inclined from the upper portion to the lower portion, The stopper mounting hole 13 and the stopper mounting hole 13, and the spring 41 is elastically shrunk upward, And a stopper 4 for pressing the upper surface of the bending bar 3 provided in the inner cavity 12 so that the lower portion of the stopper 4 is formed as a predetermined inclined pressing surface 42, The locking groove 33 may be formed as a ramped inclined surface 34 having a predetermined length corresponding to the pressing inclined surface 42 so that the bending table 3 can be restored by the pressing force of the stopper 4. [ Of the back cover of the display. delete

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