KR102492464B1 - Window cover for display and manufacturing method of the same - Google Patents

Abstract

A window cover for a display device according to an embodiment of the present invention includes a transparent portion, a film portion having a light blocking portion formed to surround an outer circumference of the transparent portion, and a body portion coupled to one surface of the film portion, wherein the film portion includes a film portion. A sub button hole portion is formed, a body portion button hole portion corresponding to the film portion button hole portion is formed in the body portion, and a round portion is formed toward the body portion button hole portion at an outer periphery of the film portion button hole portion.
According to the present invention, it is possible to obtain a window cover material having excellent optical performance by improving the difference in birefringence and a manufacturing method thereof.

Description

Window cover for display device and its manufacturing method {WINDOW COVER FOR DISPLAY AND MANUFACTURING METHOD OF THE SAME}

The present invention relates to a window cover for a display device and a manufacturing method thereof.

The window cover material is molded by bonding an injection material to a film. For this purpose, film insert molding produces three-dimensional decorative components for a wide range of injection-moulded plastic products. The film insert molding process can be largely divided into four steps: printing, film forming, trimming, and injection molding. After performing a printing process to print figures, characters, patterns, etc. composed of various colors on the surface of the film, a three-dimensional curved shape corresponding to the skin layer of the product is formed through various film molding such as pressure molding and vacuum molding. A plastic product integrated with the film can be molded by performing trimming to cut off unnecessary portions of the film, inserting the film into a mold, and then performing injection molding in which molten resin is injected.

On the other hand, among the window cover materials, the display cover window for vehicles includes a cluster that provides essential information to the driver, a CID (Center Information Display) that can display and control the operation status of various devices in the vehicle, and an RSE for infotainment for rear seat passengers. Rear Seat Entertainment), RMD (Room Mirror Display) that replaces real-view mirrors or side mirrors.

Also, the display device includes a display area in which each pixel is arranged in a matrix form and a non-display area disposed outside the display area. The display area is an area where the user can view images or information generated by the display device, and the non-display area is an area in which the user cannot view the image or information generated by the display device, generally referred to as a bezel area. is also called

The cover window of the CID, which is a window cover material, serves to protect the display panel of the display device, and includes a transparent portion corresponding to the display area of the display device and a light blocking portion corresponding to the non-display area of the display device. The light blocking portion is opaque compared to the transparent portion and is disposed outside the transparent portion.

In addition, since plastic materials have the advantage of being safer than glass and capable of implementing various shapes, the demand for plastic cover windows is increasing.

That is, the addition of a functional layer, a seamless design, and various designs are required for the cover window of the CID, and high visibility, information transmission, and aesthetics of high gloss are required for the display, and optical performance according to the improvement of the birefringence difference. improvement is required

On the other hand, in the manufacturing method of the display cover window according to the prior art, the injection process is performed while the IML film is placed on a separate film hanger to supply the injection material to the preformed IML film. As a result, problems such as slipping of the printed part and occurrence of outer stepped parts occur during injection, and productivity decreases due to the need to remove the film hanger after the injection process.

In addition, as the gate for supplying the injection material to the film is disposed outside the mold, the birefringence performance deteriorates, and the defect rate increases due to the occurrence of ear flow and weld lines.

An object of the present invention is to provide a window cover for a display device having excellent optical performance by improving birefringence difference and a method for manufacturing the same.

Another object of the present invention is to provide a window cover for a display device having film stability according to ear flow phenomenon and weld line reduction and a manufacturing method thereof.

Another object of the present invention is to provide a window cover for a display device and a method for manufacturing the same, which can minimize film hangers, improve seating properties of an insert film, and secure reliability during an injection process.

Another object of the present invention is to provide a window cover for a display device with improved reliability of an injection process and a manufacturing method thereof.

[Definition]

In the present invention, birefringence means a phenomenon in which light incident on a crystal having a different refractive index depending on the direction is refracted into two refracted lights having different directions.

In the present invention, ear flow means a fold in which the edge of the film is rolled up.

In the present invention, the weld line means a joining line formed by the boundary of the injection material according to the flow of the injection material.

In the present invention, the center line refers to an arbitrary point that is the same distance when the distance from an arbitrary point to both ends in a predetermined direction is measured as a center point, and a line connecting the center points when the center points in the predetermined direction are successively taken. means

In addition, the center line is usually a straight line, but if the center line is not straight, and when an arbitrary line is drawn and contains 50% or more of the center points, the arbitrary line is regarded as the center line.

By defining a centerline according to the present invention, more than one centerline can be defined in a product. At this time, when the product is actually mounted/decorated, the center line in the up-down direction from the front facing the user is called the first center line, the center line perpendicular to the first center line is called the second center line, and the normal center line is called the first center line. do.

Here, both ends correspond to the outer circumferential surface of the product in the case of a product, the outer circumferential surface of the corresponding part in the case of a part of the product, and the shape corresponding to the function in the case of a function. Unless otherwise specified, centerline refers to the centerline of the product.

Substantially symmetrical in the present invention means a case where the center point deviated from the center line is within 20% according to the definition of the center line in the present invention.

(In the case of the attached drawing, it is not symmetrical, but when the center line is defined, it is symmetrical if changed to symmetrical)

In the present invention, the parting line means the dividing line of the dividing mold. That is, the mold is divided into an upper mold and a lower mold, and means a line where the upper mold and the lower mold come into contact when the upper mold and the lower mold are separated or closed.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned above can be understood by the following description and will be more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by means of the instrumentalities and combinations indicated in the claims.

A window cover for a display device according to an embodiment of the present invention includes a transparent portion, a film portion having a light blocking portion formed to surround an outer circumference of the transparent portion, and a body portion coupled to one surface of the film portion, wherein the film portion includes a film portion. A sub button hole portion is formed, a body portion button hole portion corresponding to the film portion button hole portion is formed in the body portion, and a round portion is formed toward the body portion button hole portion at an outer periphery of the film portion button hole portion.

In addition, in the window cover for a display device, the edge thickness (D) of the film part for the buttonhole part of the film part may be formed to be 0.2 mm or more and 0.5 mm or less.

In addition, in the window cover for a display device, the body portion is formed by flowing outwardly from the injection material button hole portion.

In addition, in the window cover for a display device, the flow of the injection material includes a first flow and a second flow, the first flow is a horizontal flow outward from the injection material button hole, and the second flow The flow is the vertical flow of the injection material according to the flow pressure of the injection material.

A method of manufacturing a window cover for a display device according to an embodiment of the present invention includes the step of preforming an insert film in which a gate region of a film portion having a shape penetrating an insert film and a buttonhole region of the film portion having a step gap from one side to the other side are formed; An insert film mold holding step of mounting the film holding part to the protrusion of the mold, and providing an injection material to the insert film to combine the injection material having a body button hole area corresponding to the film part button hole area formed with the insert film It includes a step of discharging the injection material and a button hole forming step of performing hole processing on the button hole region of the film part and the button hole region of the body part.

In addition, in the method of manufacturing a window cover for a display device, in the button hole forming step, the film part edge thickness D for the film part button hole part may be formed to be 0.2 mm or more and 0.5 mm or less.

In addition, in the method of manufacturing a window cover for a display device, in the step of discharging the injection material, in a state in which one surface of the insert film is placed in contact with the mold, the injection material is supplied to the other surface of the insert film through the film gate region. to provide.

In addition, in the manufacturing method of a window cover for a display device, the preforming of the insert film further forms a stepped film part button region on the insert film.

Also, in the method of manufacturing a window cover for a display device, the film gate area is formed in the button area of the film part.

In addition, in the manufacturing method of a window cover for a display device, in the step of discharging the injection material, the insert film is placed in contact with the first mold, the injection material is provided to the other surface of the insert film, and the second mold is placed in the first mold. 1 further comprising a mold pressing step of moving the mold toward the mold.

In addition, in the method of manufacturing a window cover for a display device, the button hole region of the film unit is placed on the stepped portion of the first mold, and suction force is applied to the button hole region of the film so that the button hole region of the film is in contact with the stepped portion. It may further include an inhalation step to provide.

Details of other embodiments are included in the detailed description and drawings.

According to the present invention, it is possible to obtain a window cover for a display device having excellent optical performance by improving the difference in birefringence and a manufacturing method thereof.

According to the present invention, it is possible to obtain a window cover for a display device having film stability according to ear flow phenomenon and weld line reduction and a manufacturing method thereof.

According to the present invention, it is possible to obtain a window cover for a display device and a method for manufacturing the window cover for a display device capable of minimizing a film hanger, improving seating properties of an insert film, and securing reliability during an injection process.

According to the present invention, a window cover for a display device with improved reliability of an injection process and a method for manufacturing the same can be obtained by suctioning the insert film and fixing the insert film in close contact with the processing unit.

In addition to the effects described above, specific effects of the present invention will be described together while explaining specific details for carrying out the present invention.

1 is a configuration diagram schematically showing the technical idea of the present invention.
Figure 2 is a schematic configuration diagram of the film material shown in Figure 1;
Figure 3 is a configuration diagram schematically showing the technical idea of the window cover for the display device of the present invention.
Figure 4 is a configuration diagram schematically showing a window covering material according to an embodiment of the present invention.
5 is a schematic AA cross-sectional view of the window covering material shown in FIG. 4;
Figure 6 is a configuration diagram schematically showing the technical characteristics of the detailed configuration of the window covering material shown in FIG.
FIG. 7 is a configuration diagram schematically showing technical characteristics of the gate region of the film unit in the window covering material shown in FIG. 4 .
8 is a configuration diagram schematically showing a window cover for a display device according to an embodiment of the present invention.
FIG. 9 is a schematic BB cross-sectional view of the window cover for the display device shown in FIG. 8 .
10 is a flowchart schematically illustrating a method for manufacturing a window covering material according to a first embodiment of the present invention.
11 is a configuration diagram schematically showing an embodiment of a mold and an injection material ejection device for implementing the method for manufacturing a window cover material shown in FIG. 10 .
FIG. 12 is a schematic configuration diagram of a preformed film mounted on a mold in the method of manufacturing the injection-molded film of FIG. 10 .
13 and 14 are configuration diagrams schematically showing a specific example of implementing the insert film upper mold mounting step in the method for manufacturing a window covering material shown in FIG. 10 .
15 is a configuration diagram schematically showing a specific example of implementing an injection material discharging step in the method for manufacturing a window covering material shown in FIG. 10 .
FIG. 16 is a schematic usage state diagram of the injection material discharging step shown in FIG. 10;
17 is a configuration diagram schematically showing a specific example of implementing a lower mold pressing step in the method for manufacturing a window cover material shown in FIG. 10 .
18 is a flowchart schematically illustrating a method for manufacturing a window covering material according to a second embodiment of the present invention.
19 is a configuration diagram schematically showing an embodiment of a suction device for implementing the method for manufacturing a window covering material shown in FIG. 18. Referring to FIG.
20 is a configuration diagram schematically showing a specific example of implementing an insert film suction step in the method for manufacturing a window covering material shown in FIG. 19 .

Accordingly, those skilled in the art will be able to easily implement the technical spirit of the present invention. In describing the present invention, if it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

Hereinafter, the arrangement of an arbitrary element on the "upper (or lower)" or "upper (or lower)" of a component means that an arbitrary element is placed in contact with the upper (or lower) surface of the component. In addition, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.

In addition, when a component is described as being “connected”, “coupled” or “connected” to another component, the components may be directly connected or connected to each other, but other components may be “connected” between each component. It will be understood that "intervening", or that each component may be "connected", "coupled" or "connected" through another component.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic configuration diagram of the technical idea of the present invention, and FIG. 2 is a schematic configuration diagram of the film material shown in FIG.

More specifically, in the present invention, a window cover for a display device includes a film material and a body part, and an injection-bonded material is injected and bonded to the film material to form the body part.

To this end, the injection material is discharged while the film material is fixed, and the injection material is discharged to a specific region of the film material.

In addition, the fixing method of the injection material and the initial ejection target area of the injection material are very important to the performance of the window cover for the display device.

That is, the window cover for a display device can obtain film stability only when the difference in birefringence is minimized and the ear flow phenomenon and the weld line are reduced with respect to the region corresponding to the display.

The technical idea of the present invention for this purpose will be described in more detail.

As shown, the gate region 11 and the button hole region 12 are formed in the film member 10 . The gate region 11 serves as a film portion gate region G into which the injection material is introduced when the injection material is ejected to the film material 10 .

To this end, the injection material injection device 30 includes an injection material discharge unit 31 through which the injection material is discharged, and an end of the injection material discharge unit 31 is formed to correspond to the gate region 11 .

The injection material discharge unit 31 passes through the gate region 11 of the front surface (FS) of the film material 10 and sprays the injection material of the rear surface (RS) of the film material 10 to the rear surface of the film material 10 ( RS) to form a body portion.

At this time, the gate region 11 is mounted on the ejection unit 31 of the injection unit, and the gate region 11 may serve as a film hanger F fixing the film material 10 during injection.

The button hole area 12 is formed as a stepped portion so as to protrude from the front surface FS of the film material 10 toward the rear surface RS of the film material 10 .

The gate region 11 is formed in the buttonhole region 12, and according to the present invention as described above, during the injection process of spraying the injection material on the film material, without a separate fixing member to fix the film material, As the gate area 11 serves as a hanger for fixing the film material, it is implemented simply and efficiently.

In addition, the gate area 11 of the film material may be formed in a button hole area of the film material corresponding to the button hole area of the window cover for the display device.

In this case, the button hole area means a hole area corresponding to the button unit of the display device when the window cover for the display device is coupled to the display device.

In addition, the gate region 11 is formed inside the window covering material corresponding to the window cover of the display device.

Figure 3 is a configuration diagram schematically showing the technical idea of the window cover for the display device of the present invention.

As shown, the body portion 20 of the window cover for the display device is formed by providing an injection material on the rear surface of the film member 10 .

In addition, the body portion gate region 21 is formed in the body portion 20 corresponding to the gate region 11 of the film material 10, and the body portion corresponds to the button hole region 12 of the film material 10. (20), the body portion buttonhole area 22 is formed to be stepped.

A window cover for a display device is formed by hole-processing the button hole region 12 and the body button hole region 22 of the film material 10 with respect to the window cover material formed as described above.

Also, hole processing may be implemented by NC processing.

4 is a schematic configuration diagram of a window covering material according to a first embodiment of the present invention, and FIG. 5 is a schematic A-A cross-sectional view of the window covering material shown in FIG. 1 .

A window cover material is an intermediate material for manufacturing a window cover for a display device.

As shown, the window covering material 1000 includes a film part 1100 and a body part 1200.

More specifically, the film unit 1100 may be formed of a preformed In Mold Label (IML) film. The film unit 1100 may include a transparent portion 1110 and a light blocking portion 1120 so that the window covering material 1000 is implemented as a window cover for a display device. That is, the transparent portion 1110 is formed to correspond to the display area, and the light blocking portion 1120 is formed to surround the outer periphery of the transparent portion 1110 .

In addition, a film portion gate region 1121 and a film portion buttonhole region 1122 are formed in the light blocking portion 1120 .

The film portion gate region 1121 is a gate region for injecting an injection material into the film portion 1100 . That is, the film part gate region 1121 is a gate region into which the injection material flows.

In addition, FIGS. 4 to 7 show that the film portion gate region 1121 is formed in the film portion buttonhole region 1122 as an example of the position where the film portion gate region 1121 is formed.

The film portion buttonhole region 1122 may be formed to protrude in a direction in which the body portion 1200 is positioned with respect to the film portion 1100 .

This is for the button hole area 1220 of the body part to be performed as a hanging area when the injection material is supplied. That is, the hanging area is formed as a stepped portion with respect to one surface of the film portion.

Also, the body part 1200 is coupled to the film part 1100 . To this end, the body part 1200 is formed by injection molding an injection material on the rear surface of the IML film, which is the film part 1100, and the body part 1200 is coupled to the film part 1100 at the same time.

In the body part 1200, a body part gate area 1210 corresponding to the film part gate area 1121 of the film part 1100 is formed, and a body part buttonhole area corresponding to the film part button hole area 1122. (1220) is formed.

Hereinafter, with reference to FIGS. 6 and 7 , the detailed structure and shape of the gate area of the film unit and the buttonhole area of the film unit will be described in more detail.

Figure 6 is a configuration diagram schematically showing the technical characteristics of the detailed configuration of the window covering material shown in FIG.

As shown, the film portion 1100 of the window covering material 1000 has a first center line C1 along one axis (shown as the X axis in FIG. 6) and the other axis (shown as the Y axis in FIG. 6) It has one side including a second center line (C2) for the direction.

That is, in the X-axis direction, the film unit 1100 has the same distance D1 from the first center line C1 to both ends, and in the Y-axis direction, the film unit 1100 extends from the second center line C2 to both ends. have the same distance D2.

With respect to the second center line C2 defined as described above, the film unit gate area 1121 and the film unit buttonhole area 1122 of the film unit 1100 may be located on one side.

As an example of this, the film part gate area 1121 and the film part button hole area 1122 of the film part 1100 may be positioned below the second center line C2 .

This is in consideration of the fact that the gate region 1121 of the film unit is formed on one side so that the injection material flows from one side to the other side without hindrance when the injection material is discharged to the film unit 1100 .

In addition, it is considered that the button hole region 1122 of the film part is formed on one side as the button part is formed in the lower part of the display part in the display device.

In addition, the body part buttonhole area 1220 and the body part gate area 1210 are also positioned below the second center line C2.

FIG. 7 is a configuration diagram schematically showing technical characteristics of the gate region of the film unit in the window covering material shown in FIG. 4 .

More specifically, the film portion gate region 1121 is located on the first center line C1.

In addition, it is preferable that the separation distance D3 of the gate region of the film part, which may be formed to be spaced apart from the first center line C1, is less than 10% of the total distance D4 of the window covering material.

In this case, the insert film and the body portion may be formed in a symmetrical shape with respect to the first center line.

When the gate region 1121 of the film part serves as a gate through which the injection molding material is introduced during injection molding, the effect of improving optical performance according to the symmetry of birefringence is achieved when the allowable separation distance from the center line is within 10% as described above. You can get it.

In addition, the body gate region 1210 is also located on the first center line C1, and the distance between the body gate region 1210 and the body gate region that can be formed to be spaced apart from the first center line C1 covers the window. It is preferable to form 10% or less compared to the total distance D4 of the ash.

8 is a schematic configuration diagram of a window cover for a display device according to an embodiment of the present invention, and FIG. 9 is a schematic B-B cross-sectional view of the window cover for a display device shown in FIG. 8 .

As shown, the window cover for the display device is formed as a penetrating portion by cutting the button hole area of the film part and the button hole area of the ejection part compared to the window covering material 1000 shown in FIG. 4 .

More specifically, a window cover for a display device includes a film unit 1100 and a body unit 1200, and the film unit 1100 may be formed of a preformed In Mold Label (IML) film. The film unit 1100 may include a transparent portion 1110 and a light blocking portion 1120 . That is, the transparent portion 1110 is formed to correspond to the display area, and the light blocking portion 1120 is formed to surround the outer periphery of the transparent portion 1110 .

In addition, a penetrating film portion button hole region 1121 is formed in the light blocking portion 1120 .

Also, the body part 1200 is coupled to the film part 1100 . The body part 1200 is formed by injection-molding an injection material on the rear surface of the IML film, which is the film part 1100 , and the body part 1200 is coupled to the film part 1100 .

In addition, a body portion button hole area 1210 corresponding to the film portion button hole area 1121 is formed in the body portion 1200 .

The film part button hole area 1121 and the body part button hole area 1210 are formed to be stepped so as to protrude toward the body part.

In addition, the film part button hole area 1121 and the body part button hole area 1210 are hole processed, and the hole processing may be implemented by NC processing.

The outer circumferential portion of the hole-processed film portion buttonhole portion is formed with a rounded portion toward the body portion buttonhole portion.

More specifically, the edge thickness of the film part for the button hole area of the film part of the film injection molded body after being NC etched from the inside to the outside at the parting line, that is, from the body part 1200 side to the film part 1100 side. (D) may be formed to 0.2 mm or more and 0.5 mm or less.

Through this, the aesthetic sense of the window cover for the display device from the front is improved.

In addition, as described above, the window cover for the display device forms the body portion 1200 through the window cover material 1000 as the gate area through which the injection material flows out is formed inside the film portion buttonhole area 1121. It can be confirmed that the flow of the injection molding material is directed toward the outer periphery of the body portion 1200 from the body portion buttonhole area 1210.

In addition, in the window cover 1000 for a display device, the flow of the injection molding material forming the body portion 1200 can be confirmed through Moldex3D and Optic Module.

10 is a flowchart schematically illustrating a method for manufacturing a window covering material according to a first embodiment of the present invention.

As shown, the window cover material manufacturing method (S1000) includes an insert film preforming step (S1100), an insert film upper mold mounting step (S1200), an injection material discharging step (S1300), and a lower mold pressing step (S1400), and A button hole forming step (S1500) is included.

More specifically, the insert film preforming step (S1100) is a step of preforming the IML film formed into the insert film so that the film satisfies optical characteristics.

In addition, through the insert film preforming step (S1100), a button hole region of the film part, which is a hanging part on the insert film, and a gate region of the film part, which is a gate through which the injection material flows into the insert film in the injection material ejection step, are formed.

Next, the insert film upper mold mounting step (S1200) is a step of mounting the insert film on the upper mold. First, the gate region of the film portion of the insert film is placed on the step portion of the gate of the upper mold of the upper mold. In addition, the buttonhole region of the film portion of the insert film may be mounted on the upper mold buttonhole hanger of the upper mold.

At this time, the gate region of the film portion formed in the button hole region of the film portion of the insert film is positioned to face the hot runner of the upper mold.

In the injection molding material discharging step (S1300), the injection molding material is supplied to the insert film through the gate region of the film part, which is a gate. More specifically, an injection material is provided to the other surface of the insert film through a hot runner in a state where one surface of the insert film is placed in contact with the upper mold.

Accordingly, the injection material is coupled to the insert film.

In addition, the method for manufacturing a window cover material (S1000) may further include a lower mold pressing step (S1400) of moving the lower mold to the upper mold side.

In the lower mold pressing step (S1400), the lower mold is moved toward the upper mold in a state in which injection material is filled between the upper mold and the lower mold.

As described above, the thickness of the injection material coupled to the insert film is adjusted while coupling the body portion to the film portion.

The button hole forming step (S1500) is a step of processing holes for the button hole area of the film part and the button hole area of the body part. Also, hole processing may be implemented by NC processing.

In addition, the method of manufacturing the window cover material may further include forming a gate region of the body part. In the body gate region forming step, after the injection material is supplied to the insert film, a body gate region forming bar is inserted from the upper mold through the film gate region of the insert film to form the body gate region. It can be.

11 is a configuration diagram schematically showing an embodiment of a mold and an injection material ejection device for implementing the method for manufacturing a window cover material shown in FIG. 10 .

As shown, the mold 100 for manufacturing a window covering material by combining an injection material with an ilcert film includes an upper mold 110 and a lower mold 120. In addition, an upper mold button hole hook 111, a hot runner 112, and an upper mold gate step 113 are formed in the upper mold 110.

More specifically, the upper mold button hole hanger 111 is formed of a protrusion corresponding to the button hole area of the film part so that the button hole area of the film part of the insert film is inserted and supported. In addition, the hot runner 112 is formed on the upper mold button hole hook part 111 so as to communicate with the upper mold gate stepped part 113.

In addition, the upper mold gate stepped portion 113 is for supporting the film gate region 1121 of the film portion 1100 and has a protruding shape. Accordingly, it is possible to provide the injection material in a state in which the film unit 1100 is more accurately restrained to the upper mold.

A groove 121 corresponding to the upper mold button hole hook 111 of the upper mold 110 is formed in the lower mold 120 .

As described above, as the outer shape of the upper mold 110 and the outer shape of the lower mold 120 are formed to correspond, the insert film in contact with the upper mold and the injection material in contact with the lower mold have the same shape.

Meanwhile, as another embodiment, a hot runner may be formed in the lower mold and a discharge nozzle may be inserted through the lower mold to provide an injection material.

FIG. 12 is a schematic configuration diagram of a preformed film mounted on a mold in the method of manufacturing the injection-molded film of FIG. 10 .

As shown, the insert film part 1100, which is a film part of the film injection molding, includes a transparent part 1110 and a light blocking part 1120. In addition, a film portion gate region 1121 and a film portion buttonhole region 1122 are formed in the light blocking portion 1120 .

The film portion gate region 1121 of the insert film portion 1100 is implemented as a gate for providing an injection material to the insert film portion 1100 .

In addition, unlike the insert film unit 1100 of the window covering material 1000 shown in FIG. It is positioned so that it faces upward.

This is to place the insert film through the buttonhole area 1122 of the film unit when the injection material is supplied through the gate area 1121 of the film unit.

13 and 14 are configuration diagrams schematically illustrating a specific example of implementing the insert film upper mold mounting step in the method for manufacturing a window cover material shown in FIG. 10 .

As shown, the film part button hole area 1122 is placed on the upper mold gate step 113 so that the insert film part 1100 is supported on the upper mold 110, and the upper mold button hole hook part 111 The button hole region 1122 of the film part of the insert film part 1100 is placed there.

In addition, when the film part button hole region 1122 is placed on the upper mold gate step 113, the film part gate region 1121 is positioned to face the hot runner 112.

As described above, the film part button hole area 1122 and the film part button hole area 1122 of the insert film part 1100 are respectively connected to the upper mold gate step 113 and the upper mold button hole of the upper mold 110. As the insert film part 1100 is placed on the upper mold 110 in a manner of being inserted into the hook part 111, the film for injection molding can be fixed without a separate film hanger.

Accordingly, it is possible to apply the injection material to the other surface of the insert film unit 1100, one surface of which is in contact with the upper mold 110.

15 is a configuration diagram schematically illustrating a specific example of implementing an injection material discharging step in the method for manufacturing a window covering material shown in FIG. 10 .

FIG. 16 is a schematic usage state diagram of the injection material discharging step shown in FIG. 10;

As shown, the injection material is discharged through the hot runner 112 through the gate region 1121 of the film part 1100 of the insert film part 1100 . At this time, the flow of the injection material in the discharge direction is restricted by the lower mold 120 and flows in the downward direction.

More specifically, as shown in FIG. 16, the flow of the injection material includes a first flow F1, a second flow F2, and a third flow F3.

The first flow flow F1 defines the flow of the injection material discharged through the film portion gate area 1121, which is the gate of the injection material, and the second flow flow F2 defines the flow of the injection material in the horizontal direction. 3 Flow flow (F3) defines the vertical flow of the injection material according to the flow pressure of the injection material.

In addition, the vertical flow of the injection material may correspond to the direction of gravity.

As described above, as the injection material flows into the first flow stream F1, the second flow stream F2, and the third flow flow F3, the effect of reducing the reverse flow of the injection material and the formation of the meld line can be obtained. .

17 is a configuration diagram schematically showing a specific example of implementing a lower mold pressing step in the method for manufacturing a window covering material shown in FIG. 10 .

As shown, the lower mold 120 is moved in a state where the injection material is discharged between the upper mold 110 and the lower mold 120.

That is, the discharge material is discharged between the upper mold 110 and the lower mold 120 so as to fall short of the prescribed amount, and the lower mold 120 is moved to the upper mold 110. Accordingly, rapid change in the flow of the injection material due to the initial discharge pressure is prevented, the injection material flows stably, and the thickness of the injection material can be adjusted by adjusting the distance between the upper mold 110 and the lower mold 120.

18 is a flowchart schematically illustrating a method for manufacturing a window covering material according to a second embodiment of the present invention.

As shown, the method for manufacturing a window covering material according to the second embodiment further includes an insert film suction step compared to the method for manufacturing a window covering material shown in FIG. 7 .

More specifically, the window cover material manufacturing method (S2000) includes an insert film preforming step (S2100), an insert film upper mold mounting step (S2200), an insert film suction step (S2300), an injection material discharging step (S2400), a lower mold It includes a pressing step (S2500) and a button hole forming step (S2600).

In addition, the insert film preforming step (S2100) and the insert film upper mold mounting step (S2200) are the insert film preforming step (S1100) and insert film upper mold mounting of the window cover material manufacturing method (S1000) according to the first embodiment. It is the same as step S1200.

Next, the insert film suction step (S2300) is a step of fixing the insert film to the upper mold by providing suction force to the insert film through the suction part. Accordingly, the insert film mounted on the upper mold remains adsorbed to the upper mold by the suction force.

As described above, when the injection material is supplied to the insert film in the injection material ejection step as the insert film is adsorbed to the upper mold, more stable support of the insert film is possible.

Next, the injection material discharging step (S2400), the lower mold pressing step (S2500), and the button hole forming step (S2600) are the injection material discharging step (S1300) of the window cover material manufacturing method (S1000) according to the first embodiment, the lower It is the same as the mold pressing step (S1400) and the button hole forming step (S1500), and detailed descriptions thereof are omitted.

19 is a block diagram schematically showing an embodiment of a suction device for implementing the method for manufacturing a window covering material shown in FIG. 18, and FIG. 20 is a view showing an insert film in the manufacturing method for a window covering material shown in FIG. As shown, the suction part 200 may be coupled to the upper mold 110 so as to extend to the upper mold button hole hook 111.

In addition, when providing a suction force to the insert film, as the film part button hole area 1122 adheres to the upper mold button hole hook 111 of the upper mold 110, a large contact area S is formed. Fixed efficiency is increased.

As described above, in the step of ejecting the injection material, the insert film can be suctioned and fixed to the upper mold more effectively, and the insert film is pushed as the injection material is discharged to the insert film while the insert film is in close contact with the insert film. Such phenomena are prevented in advance and efficient application is possible.

In the above, a preferred embodiment of the present invention has been described with reference to the accompanying drawings, but those skilled in the art to which the present invention pertains may change the technical spirit or essential characteristics of the present invention in other specific forms. It will be appreciated that this can be implemented. Therefore, one embodiment described above should be understood as illustrative in all respects and not limiting.

1000: window covering material
1100: film unit
1110: transparent part
1120: light blocking unit
1121: film part gate area
1122: film part button hole area
1200: body part
1210: body gate area
1220: body button hole area

Claims (11)

After forming the gate area of the film part through the insert film and the buttonhole area of the film part so as to be stepped from one side to the other side,
The insert film having the film portion button hole region is mounted on the protruding portion of the mold,
Injection material is supplied to the mounted insert film to form a body button hole area corresponding to the film button hole area. After the injection material is combined with the insert film, the film button hole area and the body button hole area The window cover is manufactured by hole processing,
a film portion formed with a transparent portion and a light-shielding portion formed to surround an outer periphery of the transparent portion; and
Including a body portion coupled to one surface of the film portion,
A film button hole area is formed in the film part, a body button hole area corresponding to the film part button hole area is formed in the body part, and an outer periphery of the film part button hole area faces toward the body button hole area. A window cover for a display device in which a round portion is formed.
According to claim 1,
A window cover for a display device, wherein a thickness (D) of an edge of the film portion relative to the buttonhole region of the film portion is 0.2 mm to 0.5 mm.
According to claim 1,
The body portion is formed by flowing outward from the injection material button hole area.
Window covers for display devices.
According to claim 3,
The flow of the injection material includes a first flow and a second flow,
The first flow flow is a horizontal flow outward from the injection material button hole area, and the second flow flow is a vertical flow of the injection material according to the flow pressure of the injection material.
Window covers for display devices.
An insert film preforming step of forming a gate region of the film portion penetrating the insert film and a buttonhole region of the film portion so as to be stepped from one side to the other side;
An insert film mold mounting step of mounting the preformed insert film on a protrusion of a mold;
an injection-molded material discharging step of supplying an injection-molded material to the insert film and coupling the injection-molded material to the insert film in which the buttonhole area of the body portion corresponding to the buttonhole area of the film part is formed; and
Including a button hole forming step of hole processing for the film part button hole area and the body part button hole area
A method for manufacturing a window cover for a display device.
According to claim 5,
In the button hole forming step, the film part edge thickness (D) for the film part button hole area is formed to be 0.2 mm to 0.5 mm.
A method for manufacturing a window cover for a display device.
According to claim 5,
In the step of discharging the injection material, the injection material is provided to the other surface of the insert film through the gate region of the film unit in a state where one surface of the insert film is placed in contact with the mold.
A method for manufacturing a window cover for a display device.
According to claim 5,
The film part gate area is formed in the film part button hole area.
A method for manufacturing a window cover for a display device.
According to claim 5,
In the step of discharging the injection material, the insert film is placed in contact with the first mold, and the injection material is supplied to the other surface of the insert film,
Further comprising a mold pressing step of moving the second mold toward the first mold
A method for manufacturing a window cover for a display device.
According to claim 9,
Further comprising a suction step of passing the film part button hole area to the stepped part of the first mold and providing a suction force to the film part button hole area so that the film part button hole area comes into contact with the stepped part
A method for manufacturing a window cover for a display device.
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