KR20200139077A - Window cover for display, window cover parts, manufacturing machine and manufacturing method of the same - Google Patents

Abstract

The present invention relates to a window cover material comprising: a film part in which a film part gate region to which an injection material is supplied, and a body part coupled to one surface of the film part, wherein the film part gate region is formed in a central region of the film part, and the central region is formed in a region between +10% and -10% based on a center line with respect to the entire region of the film part. According to the present invention, the difference in birefringence is improved to have excellent optical performance.

Description

Window cover for display device, window cover material, and manufacturing device and manufacturing method thereof {WINDOW COVER FOR DISPLAY, WINDOW COVER PARTS, MANUFACTURING MACHINE AND MANUFACTURING METHOD OF THE SAME}

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

The window cover material is molded by bonding an injection material to a film. Film insert molding for this produces three-dimensional decorative parts for a wide range of injection-molded plastic products. The film insert molding process can be largely divided into four stages, such as printing, film molding, trimming, and injection molding. After performing the printing process to print figures, characters, and patterns composed of various colors on the film surface, a three-dimensional curved shape corresponding to the skin layer of the product is formed through various film molding such as pressure-pneumatic molding and vacuum molding. A plastic product integrated with the film can be molded by performing trimming to cut out 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 vehicle display cover window includes a cluster that provides essential information to the driver, CID (Center Information Display), which can display and control the operation status of various devices in the vehicle, and RSE (for infotainment) for rear seat occupants. Rear Seat Entertainment), and RMD (Room Mirror Display), which replaces real-view mirrors or side mirrors.

In addition, the display 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 in which a user can visually recognize the image 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, and is generally a bezel area. It is also called

The cover window of the CID, which is a window covering material, serves to protect the display panel of the display device, and includes a transparent portion corresponding to a display area of the display device and a light shielding portion corresponding to a non-display area of the display 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 are safer than glass and have the advantage of implementing various shapes, the demand for plastic cover windows is increasing.

In other words, the CID cover window requires the addition of a functional layer, a seamless design, and a variety of designs, and high visibility, information transmission, and high gloss aesthetics are required for the display, and optical performance according to the improvement of the difference in birefringence. Improvement is required.

Meanwhile, in the manufacturing method of the display cover window according to the prior art, in order to supply the injection material to the preformed IML film, the injection process is performed while the IML film is mounted on a separate film hanger. Accordingly, problems such as a push phenomenon of the printing unit and occurrence of an outer stepped portion occur during injection, and a problem of lowering productivity occurs as the film hanger must be removed 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 decreases, and the defect rate increases due to the ear flow phenomenon and the occurrence of the weld line.

It is an object of the present invention to provide a window cover for a display device, a window cover material, and an apparatus and a method for manufacturing the same, which have excellent optical performance by improving the difference in birefringence.

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

Another object of the present invention is to provide a window cover for a display device, a window cover material, and a manufacturing apparatus and manufacturing method thereof that can improve the seating property of an insert film while minimizing the film hanger and secure reliability during the injection process. will be.

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

[Term Definition]

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

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

In the present invention, the weld line means a bonding 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 becomes the same distance when the distance from an arbitrary point to both ends in a predetermined direction is measured, and a connecting line of the center point when the central point in a predetermined direction is continuously taken. Means.

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

By the definition of the center line according to the present invention, one or more center lines may be defined in a product. At this time, when the product is actually installed/decorated, the center line in the vertical direction from the front viewed by the user is called the first center line, and the center line in the direction perpendicular to the first center line is called the second center line, and the normal center line is 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 circumference of the 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 stated, the center line means the center line of the product.

Substantially symmetric 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 if the center line is defined, it is symmetrical if it is changed to symmetrical)

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

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention that are not mentioned can be understood by the following description, and will be more clearly understood by examples of the present invention. In addition, it will be easily understood that the objects and advantages of the present invention can be realized by the means shown in the claims and combinations thereof.

The window cover material according to an embodiment of the present invention includes a film portion in which a film portion gate region is formed to which an injection material is supplied, and a body portion coupled to one surface of the film portion, and the film portion gate region is formed in a central region of the film portion. The central region is formed in a region between +10% and -10% based on the center line with respect to the entire region of the film unit.

In addition, in the window cover material, a button region of a film part is further formed in the film part, and a button region of a body part corresponding to the button region of the film part is formed in the body part.

In addition, in the window cover material, the film part gate region is formed in the film part button region.

In addition, in the window cover material, the film portion button region and the body portion button region are formed to protrude from the one surface to the other surface.

In addition, in the window cover material, the film part button region and the body part button region may be formed to be symmetrical with respect to the center line.

In addition, in the window cover material, the film portion may include a transparent portion and a light blocking portion formed to surround an outer circumference of the transparent portion, and the film gate region and the film portion button region may be formed in the light blocking portion.

In addition, in the window cover material, the light blocking portion may include a display area and an extended area, and the film gate area and the film portion button area may be formed in the extended area.

In addition, in the window cover material, a body portion gate region corresponding to the film portion gate region may be formed on the body portion.

In addition, in the window cover material, the body portion gate region may be formed in the body portion button region.

In addition, the method of manufacturing a window cover material 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 through the insert film is formed in a central region of the insert film, and the film mounting portion of the mold. Including an insert film mold mounting step mounted on the protrusion, and an injection material discharging step of providing an injection material to the insert film, wherein the central region is between +10% and -10% based on a center line for the entire area of the film unit It can be formed in the area of.

In addition, in the method of manufacturing a window cover material, the injection material discharging step may provide an injection material to the other surface of the insert film through the film gate area in a state in which one surface of the insert film is mounted to contact the mold have.

In addition, in the window cover material manufacturing method, the injection material discharging step is mounted so that the insert film is in contact with the first mold, the injection material is provided to the other surface of the insert film, and the second mold is attached to the first mold. It may further include a pressing step of the mold to move to the direction.

In addition, in the method for manufacturing a window cover material, the insert film preforming step may further form a stepped button region of the film portion on the insert film.

In addition, in the method of manufacturing a window cover material, the film gate region is formed in the button region of the film part.

In addition, in the window cover material manufacturing method, a suction step of providing a suction force to the film button region such that the film button region is mounted on a stepped portion of the mold, and the film button region contacts the stepped portion. It may contain more.

In the window cover material manufacturing apparatus according to an embodiment of the present invention, a first mold having a hot runner facing a film gate area formed in a central region of an insert film, and a second mold facing the first mold are included. In addition, the hot runner may be formed in a central region of the first mold, and the central region may be formed in a region between +10% and -10% based on a center line with respect to the entire region of the film unit.

In the window cover material manufacturing apparatus, a protrusion corresponding to a button region of the film part may be formed in the first mold.

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-shielding portion formed to surround an outer peripheral portion of the transparent portion, and a body portion coupled to one surface of the film portion, and the film portion includes a film A secondary buttonhole area is formed, a body buttonhole area corresponding to the film buttonhole is formed in the body, and the body is made by supplying an injection material into the film part, and injection forming the body part The flow of ash flows from the buttonhole region of the body toward the outer circumference of the body part, and a gate region of the film part through which the injection material is discharged is formed in the buttonhole region of the film part, and the gate region of the film part is a central region of the film part. And the central region is formed in a region between +10% and -10% based on the center line with respect to the entire region of the film unit.

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

According to the present invention, a difference in birefringence is improved, and a window cover for a display device, a window cover material, and a manufacturing apparatus and manufacturing method thereof having excellent optical performance can be obtained.

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

According to the present invention, it is possible to obtain a window cover for a display device, a window cover material, a manufacturing apparatus and a manufacturing method thereof, which can minimize the film hanger and improve the seating property of an insert film and secure reliability during an injection process.

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

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

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

Accordingly, those of ordinary skill in the technical field to which the present invention pertains will be able to easily implement the technical idea of the present invention. In describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the subject matter of the present invention, a detailed description will be omitted. Hereinafter, preferred embodiments of 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 elements.

Hereinafter, it means that an arbitrary component is disposed on the "top (or lower)" of the component or the "top (or lower)" of the component, the arbitrary component is arranged in contact with the top (or bottom) 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 are "connected" between each component. It is to be understood that intervening" or each component may be "connected", "coupled" or "connected" through other components.

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

1 is a configuration diagram schematically showing the technical idea of the present invention, 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 injection-bonding the injection material 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 area of the film material.

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

That is, in the window cover for a display device, the difference in birefringence must be minimized in the area corresponding to the display, and the ear flow phenomenon and the weld line must be reduced to obtain film stability.

For this, the technical idea of the present invention will be described in more detail.

As shown, a gate region 11 is formed on the film material 10. The gate area 11 performs a film part gate area G into which the injection material is introduced when the injection material is discharged to the film material 10.

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

The injection material discharge part 31 passes through the front (FS) gate area 11 of the film material 10, and sprays the rear surface (RS) of the film material 10 to spray the injection material to the rear surface of the film material 10 ( RS) to form a body part.

In this case, the gate region 11 may be mounted on the ejection portion discharge portion 31, and the gate region 11 may serve as a film hook portion F fixing the film material 10 during injection.

The present invention is made as described above, without a separate fixing member to fix the film material during the injection process of spraying the injection material to the film material, the gate region 11 serves as a hook to fix the film material. It is implemented simply and efficiently.

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

In this case, the buttonhole area means a hole area corresponding to the button portion 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 in the window cover material corresponding to the window cover of the display device.

In addition, the film portion has a shape symmetrical with respect to the center line, and the gate region 11 is positioned at the center line C. It is preferable that the separation distance W2 of the gate region of the film portion that may be formed to be separated from the center line C is formed to be 10% or less compared to the total distance W1 of the film material.

As described above, when the gate region 11 is positioned at a distance of 10% from the center line, an effect of improving optical performance due to symmetry of birefringence can be obtained.

FIG. 3 is a schematic diagram illustrating a window cover material according to a first embodiment of the present invention, and FIG. 4 is a schematic A-A cross-sectional view of the window cover material shown in FIG. 3.

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

As shown, the window cover material 1000 includes a film portion 1100 and a body portion 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 unit 1110 and a light blocking unit 1120 so that the window cover 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 peripheral portion of the transparent portion 1110.

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

The film part gate region 1121 is a gate region for spraying the injection material onto the film part 1100. That is, the film part gate region 1121 is a gate region into which the injection material is introduced.

3 to 6 are examples of locations where the film part gate region 1121 is formed, and illustrate that the film part gate region 1121 is formed in the film part buttonhole region 1122.

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

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

In addition, the body portion 1200 is coupled to the film portion 1100. To this end, an injection molding material is injection-molded on the rear surface of the IML film, which is the film unit 1100, to form the body unit 1200, and the body unit 1200 is coupled to the film unit 1100.

In addition, a body part gate region 1210 corresponding to the film part gate region 1121 of the film part 1100 is formed in the body part 1200, and a body part buttonhole region corresponding to the film part buttonhole region 1122 1220 is formed.

Hereinafter, detailed configurations and shapes of the gate region of the film part and the buttonhole region of the film part will be described in more detail with reference to FIGS. 5 to 6.

5 is a block diagram schematically showing the technical characteristics of the detailed configuration of the window cover material shown in FIG.

As shown, the film part 1100 of the window cover material 1000 has the first center line C1 and the other axis (shown as the Y-axis in FIG. 5) with respect to one axis (shown as the X-axis in FIG. 5). It has one surface including the second center line C2 with respect to the direction.

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

The film part gate region 1121 and the film part buttonhole region 1122 of the film part 1100 may be located at one side with respect to the second center line C2 defined as described above.

As an example of this, the film part gate region 1121 and the film part buttonhole region 1122 of the film part 1100 may be located below the second center line C2.

This is in consideration of the fact that the film part gate region 1121 is formed on one side so as to flow from one side to the other without interference when the injection material is discharged to the film part 1100.

In addition, in the display device, as the button portion is formed under the display portion, the film portion buttonhole region 1122 is formed at one side.

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

6 is a block diagram schematically showing the technical characteristics of a gate region of a film part in the window cover material shown in FIG. 5.

More specifically, the film part 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 portion that may be formed to be separated from the first center line C1 is 10% or less than the total distance D4 of the window cover material.

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

When the gate area 1121 of the film part serves as a gate through which the injection material flows in during injection molding, the effect of improving optical performance due to the symmetry of birefringence when the allowable separation distance from the center line is within 10% as described above. Can be obtained.

In addition, the body part gate region 1210 is also located at the first center line C1, and the body part gate region 1210 is spaced apart from the first center line C1, and the separation distance between the body part gate region is a window cover. It is preferable to form less than 10% of the total distance (D4) of the ash.

7 is a flow chart schematically showing a method of manufacturing a window cover material according to a first embodiment of the present invention.

As shown, the window cover material manufacturing method (S1000) includes the insert film preforming step (S1100), the insert film upper mold mounting step (S1200), the injection material discharging step (S1300), and the lower mold pressing step (S1400). Include.

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

In addition, through the insert film preforming step (S1100), a buttonhole region of the film part, which is a hook part, 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 discharging 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 mounted on the stepped portion of the upper mold gate 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 hook portion of the upper mold.

In this case, the gate region of the film part formed in the buttonhole region of the film part of the insert film is positioned to face the hot runner of the upper mold.

In addition, the injection material discharging step (S1300) is a step of supplying the injection material to the central region of the insert film through the gate region of the film part as a gate. More specifically, the injection material is provided on the other surface of the insert film through a hot runner while being mounted on the upper mold so that one surface of the insert film is in contact.

In addition, the central region may be formed as a region between +10% and -10% based on the center line with respect to the entire region of the film unit.

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

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

In the lower mold pressing step (S1500), the lower mold is moved toward the upper mold while the injection material is filled between the upper mold and the lower mold.

As described above, the thickness of the injection material bonded to the insert film is adjusted while bonding the body part to the film part.

In addition, the method of manufacturing the window cover material may further include forming a body part gate region. In the step of forming the body gate region, after the injection material is supplied to the insert film, the 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 to form the body gate region. Can be.

8 is a block diagram schematically showing an embodiment of a mold and injection material discharging apparatus for implementing the method of manufacturing the window cover material shown in FIG. 7.

As shown, the mold 100 for manufacturing the window cover material by bonding the injection material to the insert film includes an upper mold 110 and a lower mold 120. In addition, an upper mold buttonhole hook 111, a hot runner 112, and an upper mold gate step 113 are formed on the upper mold 110.

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

The hot runner 112 may be formed in a central region of the upper mold 110, and the central region may be formed in an area between +10% and -10% based on the center line of the entire area of the film unit.

In addition, the upper mold gate stepped portion 113 is configured to pass through the film gate region 1121 of the film portion 1100 and has a protruding shape. Accordingly, it is possible to provide an injection material in a state in which the film part 1100 is more accurately constrained to the upper mold.

The lower mold 120 is provided with a groove 121 corresponding to the upper mold buttonhole hook 111 of the upper mold 110.

As described above, as the outer shape of the upper mold 110 and the lower mold 120 are formed to correspond to each other, 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.

9 is a block diagram schematically illustrating an insert film mounted on a mold in the method of manufacturing the injection molded film of FIG. 7.

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

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

In addition, the insert film unit 1100 for molding an injection material is different from the insert film unit 1100 of the window cover material 1000 shown in FIG. 1, the buttonhole area 1122 and the gate area 1121 of the film unit It is positioned so as to face upward.

This is for mounting the insert film through the film buttonhole region 1122 when the injection material is supplied through the film part gate region 1121.

10 and 11 are diagrams schematically showing a specific example of implementing an insert film upper mold mounting step in the method of manufacturing the window cover material shown in FIG. 7.

As shown, the film part buttonhole area 1122 is mounted on the upper mold gate stepped part 113 so that the insert film part 1100 is supported on the upper mold 110, and the upper mold buttonhole hook part 111 The buttonhole area 1122 of the film part of the insert film part 1100 is mounted on the insert film part 1100.

In addition, when the film part buttonhole region 1122 is mounted 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 buttonhole area 1122 and the film part buttonhole area 1122 of the insert film part 1100 are respectively separated from the upper mold gate step 113 and the upper mold buttonhole of the upper mold 110. As the insert film part 1100 is mounted on the upper mold 110 in a manner of being inserted into the hook part 111, it is possible to fix the film for injection molding without a separate film hook.

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

12 is a schematic view showing a specific example of implementing the injection material discharging step in the window cover material manufacturing method shown in FIG. 7, and FIG. 13 is a schematic use of the injection material discharging step shown in FIG. It is a state diagram.

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

More specifically, as shown in FIG. 13, the flow of the injection material includes a first flow flow F1, a second flow flow F2, and a third flow flow F3.

The first flow flow (F1) defines the flow of the injection material discharged through the film part gate region 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 neutral direction.

As described above, as the injection material flows in the first flow flow (F1), the second flow flow (F2), and the third flow flow (F3), it is possible to obtain the effect of lowering the reverse flow of the injection material and formation of the melt line. .

14 is a diagram schematically showing a specific example of implementing a lower mold pressing step in the method for manufacturing the window cover material shown in FIG. 7.

As shown, the lower mold 120 is moved while the injection material is discharged between the upper mold 110 and the lower mold 120.

That is, the discharge material between the upper mold 110 and the lower mold 120 is discharged so as to be less than the quantity, and the lower mold 120 is moved to the upper mold 110. Accordingly, a rapid change in the flow of the injection material is prevented due to the initial discharge pressure, the injection material flows stably, and the thickness of the injection material can be adjusted by adjusting the gap between the upper mold 110 and the lower mold 120.

15 is a flowchart schematically showing a method of manufacturing a window cover material according to a second embodiment of the present invention.

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

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

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 the insert film upper mold mounting step 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 power to the insert film through the suction unit. Accordingly, the insert film mounted on the upper mold is maintained in a state adsorbed to the upper mold by the suction force.

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

Next, the injection material discharging step (S2400) and the lower mold pressing step (S2500) are the injection material discharging step (S1300) of the window cover material manufacturing method (S1000) according to the first embodiment, and the lower mold pressing step (S1400). The same and detailed descriptions as described above are omitted.

16 is a block diagram schematically showing an embodiment of a suction device for implementing the method for manufacturing the window cover material shown in FIG. 15, and FIG. 17 is an insert film in the method for manufacturing the window cover material shown in FIG. 15 It is a block diagram schematically showing a specific example for implementing the inhalation step.

As shown, the suction part 200 may be coupled to the upper mold 110 so as to extend to the upper mold buttonhole hook part 111.

In addition, when a suction force is provided to the insert film, as the buttonhole area 1122 of the film part is in close contact with the buttonhole hook part 111 of the upper mold 110 of the upper mold 110, the contact area S is formed in a large area. Fixation efficiency is increased.

As described above, the insert film can be sucked into the upper mold by sucking the insert film in the step of discharging the injection material, and the insert film is pushed by discharging the injection material to the insert film while the insert film is in close contact. The phenomenon of the back is prevented in advance and effective application is possible.

18 is a block diagram schematically illustrating a window cover for a display device according to an embodiment of the present invention, and FIG. 19 is a schematic B-B cross-sectional view of the window cover for a display device shown in FIG. 18.

As shown, the window cover 2000 for a display device is formed as a through portion by cutting a buttonhole area of a film portion and a buttonhole area of an ejection portion compared to the window cover material 1000 shown in FIG. 3.

More specifically, the window cover 2000 for a display device includes a film part 2100 and a body part 2200.

More specifically, the film unit 2100 may be formed of a preformed In Mold Label (IML) film. The film part 2100 may include a transparent part 2110 and a light blocking part 2120. That is, the transparent portion 2110 is formed to correspond to the display area, and the light blocking portion 2120 is formed to surround the outer periphery of the transparent portion 2110.

In addition, a buttonhole region 2121 of the film portion having a penetrating shape is formed in the light blocking portion 2120.

In addition, the body portion 2200 is coupled to the film portion 2100. The body part 2200 is formed by injection-molding an injection-molded material on the back surface of the film part 2100, the IML film, and the body part 2200 is coupled to the film part 2100.

In addition, the body part buttonhole area 2210 corresponding to the film part buttonhole area 2121 is formed in the body part 2200.

In addition, as described above through the window cover material 1000, the window cover 2000 for the display device is formed in the inside of the buttonhole area 2121 through which the injection material is discharged, and thus the body 2200 It can be seen that the flow flow of the injection material forming) is directed from the buttonhole region 2210 of the body to the outer peripheral part of the body 2200.

In the buttonhole region of the film part, a gate region of the film part from which the injection material is discharged is formed, the gate region of the film part is formed in the central region of the film part, as shown in FIG. 6, and the central region is the entire region of the film part. It may be located in a region between +10% and -10% based on the center line of.

In addition, in the window cover 2000 for a display device, the flow flow of the injection material forming the body part 2200 can be checked through Moldex3D and the Optic Module.

In the above, a preferred embodiment of the present invention has been described with reference to the accompanying drawings, but those of ordinary skill in the art to which the present invention pertains, the present invention in other specific forms without changing the technical idea or essential features. It will be appreciated that it can be implemented. Therefore, it should be understood that the exemplary embodiment described above is illustrative in all respects and is not limiting.

1000: window cover material
1100: film part
1110: transparent part
1120: light shielding part
1121: film part gate region
1122: film part buttonhole area
1200: body part
1210: body gate area
1220: body buttonhole area
2000: window cover for display device
2100: film part
2110: transparent part
2120: light shielding part
2121: film part buttonhole area
2200: body part
2210: body buttonhole area

Claims (18)

A film portion in which a gate region of the film portion to which the injection material is supplied is formed; And
Including a body portion coupled to one surface of the film portion,
The film part gate region is formed in the central region of the film part,
The central area is formed in an area between +10% and -10% based on the center line with respect to the entire area of the film unit.
Window cover materials.
The method of claim 1,
A film button region is further formed in the film part, and a body button region corresponding to the film button region is formed in the body part.
Window cover materials.
The method of claim 2,
The film part gate region is formed in the film part button region
Window cover materials.
The method of claim 2,
The film part button area and the body part button area are formed to protrude from the one surface to the other surface.
Window cover materials.
The method of claim 4,
The film part button area and the body part button area are formed to be symmetrical with respect to the center line.
Window cover materials.
The method of claim 5,
The film part includes a transparent part and a light blocking part formed to surround an outer circumference of the transparent part, and the film gate area and the film part button area are formed in the light blocking part.
Window cover material..
The method of claim 6,
The light blocking part includes a display area and an extended area, and the film gate area and the film part button area are formed in the extended area.
Window cover materials.
The method of claim 2,
A window cover material having a body portion gate region corresponding to the film portion gate region formed on the body portion.
The method of claim 7,
The body part gate region is formed in the body part button region
Window cover materials.
An insert film preforming step of forming a gate region of a film portion having a shape penetrating through the insert film in a central region of the insert film;
Insert film mold mounting step of mounting the film mounting portion to the protrusion of the mold; And
Including an injection material discharging step of providing an injection material to the insert film,
The central area is formed in an area between +10% and -10% based on the center line with respect to the entire area of the film unit.
Window cover material manufacturing method.
The method of claim 10,
In the injection material discharging step, the injection material is provided to the other surface of the insert film through the film gate area while one surface of the insert film is mounted to contact the mold.
Window cover material manufacturing method.
The method of claim 11,
The injection material discharging step is mounted so that the insert film is in contact with the first mold, and the injection material is provided to the other surface of the insert film,
Further comprising a mold pressing step of moving the second mold toward the first mold
Window cover material manufacturing method.
The method of claim 10,
The insert film preforming step is to further form a stepped button region of the film portion on the insert film.
Window cover material manufacturing method.
The method of claim 13,
The film gate region is formed in the button region of the film unit
Window cover material manufacturing method.
The method of claim 14,
The method of manufacturing a window cover material further comprising a suction step of mounting the film button region to a stepped portion of the mold, and providing a suction force to the film button region so that the film button region contacts the stepped portion.
A first mold having a hot runner facing the film gate region formed in the central region of the insert film; And
Including a second mold facing the first mold,
The hot runner is formed in the central area of the first mold, and the central area is formed in an area between +10% and -10% based on the center line with respect to the entire area of the film unit.
Window cover material manufacturing device.
The method of claim 16,
In the first mold, a protrusion corresponding to the button region of the film part is formed.
Window cover material manufacturing device.
A film portion having a transparent portion and a light blocking portion formed to surround the outer peripheral portion of the transparent portion; And
Including a body portion coupled to one surface of the film portion,
The film part buttonhole region is formed in the film part, the body part buttonhole region corresponding to the film part buttonhole part is formed in the body part,
The body part is made by supplying an injection material into the film part, and a flow flow of the injection material forming the body part flows from the body part buttonhole area toward the outer peripheral part of the body part,
In the buttonhole area of the film part, a gate area of the film part from which the injection material is discharged is formed, the gate area of the film part is formed in the center area of the film part, and the center area is + with respect to the center line of the entire area of the film part. Formed in the area between 10% and -10%
Window cover for display devices.

Images