JP2001277294A - Method for manufacturing protective panel of display window of electronic machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing the protective panel of the display window of electronic machinery, capable of molding an AR layer and capable of suppressing foil flash or strain. SOLUTION: The method for manufacturing the protective panel of the display window of electronic machinery has a stage for passing a continuous film 6, which is formed by laminating a release layer, a surface AR substrate layer comprising a UV hard layer or a printing layer and an adhesive layer on a base film and is larger than a main cavity part 4a, through a cavity 3b constituted of the main cavity part 4b and a cavity part 4c for molding an embroidering part 17c and inserting a sheet 13, which has a rear surface AR substrate layer comprising the UV hard layer or the printing layer, a base sheet layer and an adhesive layer, in the cavity 3b, a stage for injecting an acrylic resin in the gap between the continuous film 6 and the sheet 13 to mold a molded article, a stage for peeling the release layer of the continuous film 6 and the base sheet layer from the molded article, a stage for cutting and removing the embroidering part 17c of the molded article to manufacture a final molded article and a stage for forming AR layers on the surface AR substrate layer and rear surface AR substrate layer of the molded article.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a protective panel for an electronic device display window which prevents reflection and enhances visibility.

[0002]

2. Description of the Related Art At present, protection panels used for mobile phones and the like are made of PMMA in consideration of surface scratch prevention and transparency.
In many cases, (acrylic) materials are used. But,
In recent years, there has been a rapid increase in the tendency to take color images into mobile phones, and the visibility of such a protective panel is reduced.

Therefore, a protective panel capable of coping with a color image has been manufactured by performing an AR process (forming an optical multilayer film to suppress reflection from external light) twice for each side.

[0004]

However, the method of manufacturing a protective panel for an electronic device display window has a problem that it is difficult to form an AR layer on a transparent acrylic resin.

Further, the printing width of the transfer film is larger than the product outer shape (1-2 mm) in consideration of a printing position shift and a position shift at the time of molding. For this reason, there is also a problem that the printing ink film is peeled off at the time of molding to form sunburrs, and the removal process is troublesome.

[0006] Furthermore, the mobile phone, which is the application of the protection panel, is becoming thinner and thinner due to the trend toward smaller size and lighter weight.
When the resin flows into the cavity through the thin gate, distortion occurs, and residual stress remains near the gate, causing a reduction in strength.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of manufacturing a protective panel for an electronic device display window in which an AR layer can be formed stably and cracks and distortion can be suppressed.

[0008]

In order to solve the above-mentioned problems, a typical structure of a method for manufacturing a protective panel for an electronic device display window according to the present invention is formed by a fixed mold and a movable mold, and a molded product is formed. At least a base in a cavity formed by a main cavity portion for molding a shape of a desired final product and an edge cavity portion for molding an edge portion formed around the entire final product. Surface A consisting of release layer, hard coat layer or print layer on film
Passing a continuous film larger than the main cavity portion in which the R underlayer and the adhesive layer are laminated, and inserting a sheet having at least a back AR underlayer, a base sheet layer and an adhesive layer comprising a hard coat layer or a printed layer; Forming the molded product by injecting a transparent acrylic resin between the continuous film and the sheet from a predetermined gate on the fixed mold and the movable mold together, and Peeling the release layer of the continuous film, the base film layer, cutting and removing the rim of the molded product to produce the final molded product, and forming the surface AR underlayer and the back surface AR underlayer of the final molded product. AR on
Forming a layer.

Further, a main cavity portion formed by a fixed die and a movable die for forming a desired shape of a final product among molded products, and a border portion formed around the entire periphery of the final product are molded. In the cavity constituted by the rim portion for the rim portion, a continuous film larger than the main cavity portion in which at least a release layer, an AR underlayer consisting of a hard coat layer or a print layer, and an adhesive layer are laminated on a base film. Through and at least A
R layer, a base sheet layer, a step of inserting a sheet having an adhesive layer, and a transparent acrylic resin between the continuous film and the sheet from a predetermined gate after combining the fixed mold and the movable mold. Injecting and molding the molded article, a release layer of the continuous film from the molded article,
The method may further include a step of peeling the base film layer, and a step of cutting and removing an edge portion of the molded product to produce a final molded product.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A first embodiment of a method for manufacturing a protection panel for an electronic device display window according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a protective panel formed by the manufacturing method of the present embodiment, FIG. 2 is an explanatory view of a stage in which a continuous film and a sheet are continuously passed through a fixed mold and a movable mold, and FIG. 3 is a continuous film. And FIG. 4 to FIG. 7 are explanatory views of a method for manufacturing the protective panel.

FIG. 1 shows an example of protective panels P1 and P2 manufactured according to the present embodiment. This protection panel P1, P
Reference numeral 2 denotes an example of a panel of an electronic device display window such as a mobile phone.
The protection panel P1 shown in FIG. 1A is a transparent acrylic plate 1a, on which a frame 1b is printed around and a transparent display window 1c for displaying a liquid crystal screen is left in the center. Further, as shown in FIG. 1 (b), it is also possible to form a protection panel P2 in which the whole is made of a transparent acrylic plate 2a, and one point 2b of characters or patterns is printed on a part thereof.

Hereinafter, a method of manufacturing the protection panel P1 for an electronic device display window according to the present embodiment will be described.

As shown in FIG. 2, in the first step, the continuous film 6 is continuously passed between the fixed mold 3 and the movable mold 4, and the continuous sheet 13 is moved to a movable mold described later. 4 through the continuous sheet hole 4d.

The fixed mold 3 has a gate 3a and a cavity 3b connected to the gate 3a. The gate 3a is an introduction path for injecting the transparent acrylic resin into the fixed mold 3 and the movable mold 4, and when the resin is filled and hardened, a sprue 17b is formed.

The movable mold 4 includes a cavity for forming a molded product 17, a continuous sheet hole 4d as a passage for the continuous sheet 13, and a punching block 4e for punching the continuous sheet 13. The cavity is a main cavity portion 4 for molding a desired shape of the final product 17a among the molded products 17.
b and a fringe cavity 4c for forming a fringe 17c formed all around the final product 17a.

A take-up device 5 is attached to the fixed mold 3. Each winding device 5 has a delivery roll 5a and a winding roll 5b, and the continuous film 6 is wound between the two.

The continuous film 6 is wound and held on a delivery roll 5a, and the leading end is passed between a fixed mold 3 and a movable mold 4 and wound on a take-up roll 5b to complete the preparation. I do. The movable mold 4 is also a fixed mold 3
Similarly to the above, a take-up device (not shown) having a delivery roll and a take-up roll is attached.

As shown in FIG. 3 (a), the continuous film 6 is formed on a base film 7 made of PET, in order, by a release layer 8 made of a material having no adhesive property, and for improving the surface hardness. A UV hard layer 9 serving as a hard coat layer, an anchor layer 10 for improving print fixability, a printing layer 11, and an adhesive layer 12 are laminated. As shown in FIG. 3B, the continuous sheet 13 has a UV hard layer 14, a transparent base sheet layer 15 made of PET, and an adhesive layer 16 laminated in this order.

The UV hard layers 9 and 14 each have a surface AR
It is used as an underlayer and a backside AR underlayer, on which an AR process described later is performed to form an AR layer. This makes it possible to stably form an AR layer that is difficult to form on the transparent acrylic resin.

The printed layer 11 is formed with a printed portion and a non-printed portion, and a transparent acrylic resin layer is provided on the back surface from the non-printed portion to form a transparent display window (see FIG. 1). Are formed. The print layer 11 has a plurality of independent print patterns formed at predetermined intervals.

Further, the continuous film 6 and the continuous sheet 13
Wide width, cavity 3b, edge portion cavity 4c
Can cover the whole.

Although the AR underlayer is the UV hard layers 9 and 14, it may be a printed layer in which at least a portion where the display window 1c is formed is transparent.

As shown in FIG. 4A, the winding device 5 is operated to move the continuous film 6 between the fixed mold 3 and the movable mold 4 with the adhesive layer 12 facing the fixed mold. Intermittently. The intermittent feeding operation is controlled so that the above-described print pattern always matches the cavity 3b of the fixed mold 3.

The continuous sheet 13 is provided with an adhesive layer in a direction crossing the continuous film 6 in synchronization with the intermittent feeding of the continuous film 6.
16 is intermittently fed to a continuous sheet hole 4d provided inside the movable mold 4 so as to face the punching block 4e. When the continuous sheet 13 does not have the print layer 11 (see FIG. 3) and has no print pattern, the high-precision intermittent feeding such as the continuous film 6 may not be necessary.

Next, as shown in FIG. 4 (b), the continuous film 6 and the continuous sheet 13 are intermittently fed as described above and stopped at a predetermined position. And tighten the mold.

As described above, the continuous film 6 and the continuous sheet
When the continuous film 13 and the continuous sheet 13 cross each other, if the continuous film 6 and the continuous sheet 13 have directivity such as polarization in the width direction and the transport direction, layers having different properties can be formed on the front and back surfaces of the protective panel. it can.

As shown in FIG. 4 (c), the continuous sheet 13 sent to the continuous sheet hole 4d of the movable mold 4 is punched by a punching block 4e to the size of the final product 17a. 13a.

Holes 6a are formed at predetermined intervals in the continuous film 6, and a transparent acrylic resin is injected between the continuous film 6 and the sheet piece 13a from the gate 3a through the holes 6a. The injected transparent acrylic resin fills the main cavity portion 4b while pressing the continuous film 6 and the sheet piece 13a against the fixed mold 3 and the movable mold 4 side. At this time, the transparent acrylic resin is first introduced into the edge cavity 4c, and flows into the cavity 3b and the main cavity 4b uniformly from the surroundings.
Therefore, the pressure distortion of the gate 3a does not concentrate on a part, and no polarization distortion occurs in the final product 17a.

Then, after the transparent acrylic resin is cured, FIG.
As shown in (a), the release work 8 and the base film 7 of the continuous film 6 are peeled off from the molded product 17 in which the continuous film 6 and the cut sheet piece 13a are integrated, and the transfer operation is completed. Thus, since the continuous sheet 13 is insert-molded and integrated with the protection panel P1, there is no need to remove the base film 7, and the manufacturing process can be simplified.

Next, the sprue 17b and the rim 17c are cut and removed from the molded product 17 using a predetermined jig. As shown in FIG. 6, a pair of cutters 18 is used as a cutting jig. Each of the cutters 18 has a cutting blade 18b erected on a pedestal 18a, and the cutting blade 18b is arranged according to the dimensions of the final product 17a.

Then, the molded product 17 is sandwiched between a pair of cutters 18, and the outer edge portion 17c is cut and removed.

In general, when a molded product is peeled off from a continuous film, a print layer to be left on the base film is pulled, and a printed film called “crack” is formed around the molded product. However, in the present embodiment, the portion where the burrs have occurred can be removed together with the rim portion 17c, so that it is not necessary to perform the burrs and the production efficiency can be improved.

As shown in FIG. 7, the final product 17a from which the rim portion 17c has been cut off is formed by forming an AR layer on the UV hard layers 9 and 14, which are AR underlayers, to form a protective panel P1.
Is molded. The AR layer can prevent reflection and improve visibility.

By sequentially sending out the print pattern of the continuous film 6 and repeating the above steps, the protection panel P1 can be manufactured continuously.

In this embodiment, the UV hard layers 9 and 14 are used as the AR underlayer.
An AR layer may be formed on a transparent print layer.

[Second Embodiment] Next, a second embodiment of a method for manufacturing a protective panel for an electronic device display window according to the present invention will be described with reference to FIG. FIG. 8 is a side sectional view of a continuous film and a sheet. The same parts as those in the first embodiment will be denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 8, in the method for manufacturing a protective panel according to the present embodiment, a continuous film 21 and a continuous sheet 22 are used instead of the continuous film 6 and the continuous sheet 13 according to the first embodiment.

As shown in FIG. 8A, the continuous film 21
A release layer 8 made of a material having no adhesiveness, a UV hard layer 9 for improving the surface hardness, an anchor layer 10 for improving the fixability of printing, and The printing layer 11 and the adhesive layer 12 are laminated.
Further, as shown in FIG. 8B, the continuous sheets 22
A layer 24, a UV hard layer 14, a transparent base sheet layer 15 made of PET, and an adhesive layer 16 are laminated.

By forming the AR layer 24 on the continuous sheet 22 in advance, there is no need to perform the AR process on the back surface of the final product.
Production processes can be reduced. Note that AR processing is performed on the front side by the method described in the first embodiment or the like.

In each of the above two embodiments, the printed layer is formed only on the upper surface side of the protection panel. However, the printed layer may be formed on both sides. Further, it may be formed only on the lower surface side.

[0041]

As described above, the UV hard layer is used as a front surface AR underlayer and a rear surface AR underlayer, and an AR layer is formed thereon by performing an AR process described later, thereby forming an AR layer. A that is difficult to form on transparent acrylic resin
The R layer can be formed stably.

Further, when the protective panel is formed, the injected transparent acrylic resin flows into the main cavity portion via the rim portion cavity portion, so that distortion which is easily caused when flowing from a single gate is prevented. be able to.

Furthermore, since the burrs of the printed layer, which are generated when the base film of the continuous film is peeled off from the molded product, are cut by removing the rim, the burrs are not required, and the production efficiency can be improved.

Further, when forming the protective panel, the sheet is insert-molded and integrated with the protective panel, so that the operation of removing the base film layer is not required, and the manufacturing process can be simplified.

By forming the AR layer on the sheet in advance, the AR processing step on one side can be omitted, so that the number of production steps can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a protection panel formed by a manufacturing method according to a first embodiment.

FIG. 2 is an explanatory view of a stage in which a continuous film and a sheet are continuously passed through a fixed mold and a movable mold.

FIG. 3 is a side sectional view of a continuous film and a sheet.

FIG. 4 is an explanatory diagram of a method of manufacturing a protection panel.

FIG. 5 is an explanatory diagram of a method of manufacturing a protection panel.

FIG. 6 is an explanatory diagram of a method of manufacturing a protection panel.

FIG. 7 is an explanatory diagram of a method of manufacturing the protection panel.

FIG. 8 is a side sectional view of a continuous film and a sheet according to a second embodiment.

[Explanation of symbols]

 P1, P2 Protective panel 1a, 2a Plate 1b Frame 1c Display window 2b One point 3 Fixed mold 3a Gate 3b Cavity 4 Movable mold 4b Main cavity 4c Cavity for border Part 4d: Hole for continuous sheet 4e: Punch block 5: Winding device 5a: Feeding roll 5b: Winding roll 6, 21, Continuous film 6a: Hole 7: Base film 8: Release layer 9, 14: UV hard layer ( Hard coat layer) 10 Anchor layer 11 Print layer 12, 16 Adhesive layer 13, 22 Sheet 13a Sheet piece 15 Base sheet layer 17 Molded product 17a Final product 17b Sprue 17c Border 18 Cutter 18a: Pedestal 18b: Cutting blade 23: AR layer 24: AR layer

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] May 16, 2000 (2000.5.1)
6)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

Patent application title: PROCESS FOR PRODUCING PROTECTIVE PANEL FOR ELECTRONIC DEVICE DISPLAY WINDOW

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a protective panel for an electronic device display window, which can suppress cracks and distortions or enhance visibility.

[0002]

2. Description of the Related Art At present, protection panels used for mobile phones and the like are made of PMMA in consideration of surface scratch prevention and transparency.
In many cases, (acrylic) materials are used. Conventionally, in the acrylic resin panel molding process, a method of injecting a transparent acrylic resin into a main cavity from a gate has been considered.

[0003]

However, the above-described method of manufacturing a protective panel for an electronic device display window is difficult when the resin flows into the cavity through a thin gate due to the reduction in the thickness of the protective panel accompanying the tendency to reduce the size and weight. However, there is a problem in that a strain is generated or a residual stress remains in the vicinity of the gate portion, resulting in a decrease in strength.

Further, the printing width of the transfer film is made larger (1-2 mm) than the outer periphery of the product in consideration of a printing position shift and a position shift at the time of molding from the product shape. For this reason, there is also a problem that the printing ink film is peeled off at the time of molding to form sunburrs, and the removal process is troublesome.

[0005] Further, in many cases, a protective panel used in a cellular phone or the like is made of a PMMA material in consideration of surface scratch prevention and transparency. However, in recent years, there has been a rapid increase in the tendency to take color images into mobile phones, and the visibility of such protective panels is reduced.

Therefore, a protective panel capable of coping with a color image has been manufactured by performing an AR process (formation of an engineering multilayer film to suppress reflection from external light) twice for each side.

However, the above-mentioned method of manufacturing a protective panel for an electronic device display window has a problem that it is difficult to form an AR layer on a transparent acrylic resin.

Accordingly, the present invention proposes a method of manufacturing a protective panel for an electronic device display window capable of suppressing cracks and distortion, or a protective panel for an electronic device display window capable of forming an AR layer stably. The purpose of the present invention is to propose a manufacturing method.

[0009]

In order to solve the above-mentioned problems, a typical configuration of a method for manufacturing a protection panel for an electronic device display window according to the present invention is formed by a fixed mold and a movable mold, and is formed by molding. In a cavity formed by a main cavity portion for molding a shape of a desired final product out of the products and an edge portion cavity portion for molding an edge portion formed around the entire periphery of the final product, acrylic Injecting a resin to form a molded product, and at least one of the front and back surfaces,
The method further comprises a step of forming a print layer on the rim, and a step of cutting and removing the rim of the molded product to produce a final molded product.

In addition, a main cavity portion formed by a fixed mold and a movable mold for molding a desired shape of a final product among molded products, and an edge portion formed around the entire periphery of the final product are molded. And a surface A comprising a release layer, a hard coat layer, or a print layer on at least the base film in the cavity formed by
Passing a continuous film larger than the main cavity portion in which the R underlayer and the adhesive layer are laminated, and inserting a sheet having at least a back AR underlayer, a base sheet layer and an adhesive layer comprising a hard coat layer or a printed layer; Forming the molded product by injecting a transparent acrylic resin between the continuous film and the sheet from a predetermined gate on the fixed mold and the movable mold together, and Peeling the release layer of the continuous film, the base film layer, cutting and removing the rim of the molded product to produce the final molded product, and forming the surface AR underlayer and the back surface AR underlayer of the final molded product. AR on
And a step of forming a layer.

In addition, a main cavity formed by a fixed mold and a movable mold for molding a desired shape of a final product among molded products, and an edge portion formed around the entire periphery of the final product are molded. In the cavity constituted by the rim portion for the rim portion, a continuous film larger than the main cavity portion in which at least a release layer, an AR underlayer consisting of a hard coat layer or a print layer, and an adhesive layer are laminated on a base film. Through and at least A
R layer, a base sheet layer, a step of inserting a sheet having an adhesive layer, and a transparent acrylic resin between the continuous film and the sheet from a predetermined gate after combining the fixed mold and the movable mold. Injecting and molding the molded article, a release layer of the continuous film from the molded article,
The method may further include a step of peeling the base film layer, and a step of cutting and removing an edge portion of the molded product to produce a final molded product.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A first embodiment of a method for manufacturing a protection panel for an electronic device display window according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a protective panel formed by the manufacturing method of the present embodiment, FIG. 2 is an explanatory view of a stage in which a continuous film and a sheet are continuously passed through a fixed mold and a movable mold, and FIG. 3 is a continuous film. And FIG. 4 to FIG. 7 are explanatory views of a method for manufacturing the protective panel.

FIG. 1 shows an example of the protection panels P1 and P2 manufactured according to the present embodiment. This protection panel P1, P
Reference numeral 2 denotes an example of a panel of an electronic device display window such as a mobile phone.
The protection panel P1 shown in FIG. 1A is a transparent acrylic plate 1a, on which a frame 1b is printed around and a transparent display window 1c for displaying a liquid crystal screen is left in the center. Further, as shown in FIG. 1 (b), it is also possible to form a protection panel P2 in which the whole is made of a transparent acrylic plate 2a, and one point 2b of characters or patterns is printed on a part thereof.

Hereinafter, a method of manufacturing the protection panel P1 for the electronic device display window according to the present embodiment will be described.

As shown in FIG. 2, in the first step, the continuous film 6 is continuously passed between the fixed mold 3 and the movable mold 4, and the continuous sheet 13 is moved to a movable mold described later. 4 through the continuous sheet hole 4d.

The fixed mold 3 has a gate 3a and a cavity 3b connected to the gate 3a. The gate 3a is an introduction path for injecting the transparent acrylic resin into the fixed mold 3 and the movable mold 4, and when the resin is filled and hardened, a sprue 17b is formed.

The movable mold 4 includes a cavity for molding the molded product 17, a continuous sheet hole 4d as a passage for the continuous sheet 13, and a punch block 4e for punching the continuous sheet 13. The cavity is a main cavity portion 4 for molding a desired shape of the final product 17a among the molded products 17.
b and a fringe cavity 4c for forming a fringe 17c formed all around the final product 17a.

A take-up device 5 is attached to the fixed mold 3. Each winding device 5 has a delivery roll 5a and a winding roll 5b, and the continuous film 6 is wound between the two.

The continuous film 6 is wound and held on a delivery roll 5a, and the leading end is passed between a fixed mold 3 and a movable mold 4 to be wound on a take-up roll 5b to complete preparation. I do. The movable mold 4 is also a fixed mold 3
Similarly to the above, a take-up device (not shown) having a delivery roll and a take-up roll is attached.

As shown in FIG. 3 (a), a continuous film 6 is formed on a base film 7 made of PET, in order, by a release layer 8 made of a material having no adhesive property, and for improving the surface hardness. A UV hard layer 9 serving as a hard coat layer, an anchor layer 10 for improving print fixability, a printing layer 11, and an adhesive layer 12 are laminated. As shown in FIG. 3B, the continuous sheet 13 has a UV hard layer 14, a transparent base sheet layer 15 made of PET, and an adhesive layer 16 laminated in this order.

The UV hard layers 9 and 14 each have a surface AR
It is used as an underlayer and a backside AR underlayer, on which an AR process described later is performed to form an AR layer. This makes it possible to stably form an AR layer that is difficult to form on the transparent acrylic resin.

The printed layer 11 is formed with a printed portion and a non-printed portion, and a transparent acrylic resin layer is provided on the back surface from the unprinted portion to form a transparent display window (see FIG. 1). Are formed. The print layer 11 has a plurality of independent print patterns formed at predetermined intervals.

The continuous film 6 and the continuous sheet 13 are
Wide width, cavity 3b, edge portion cavity 4c
Can cover the whole.

Although the AR underlayers are the UV hard layers 9 and 14, the AR underlayer may be a printing layer in which at least a portion where the display window 1c is formed is transparent.

As shown in FIG. 4A, the winding device 5 is operated to move the continuous film 6 between the fixed mold 3 and the movable mold 4 with the adhesive layer 12 facing the fixed mold. Intermittently. The intermittent feeding operation is controlled so that the above-described print pattern always matches the cavity 3b of the fixed mold 3.

The continuous sheet 13 is provided with an adhesive layer in a direction crossing the continuous film 6 in synchronization with the intermittent feeding of the continuous film 6.
16 is intermittently fed to a continuous sheet hole 4d provided inside the movable mold 4 so as to face the punching block 4e. When the continuous sheet 13 does not have the print layer 11 (see FIG. 3) and has no print pattern, the high-precision intermittent feeding such as the continuous film 6 may not be necessary.

Next, as shown in FIG. 4 (b), the continuous film 6 and the continuous sheet 13 are intermittently fed as described above and stopped at predetermined positions. And tighten the mold.

Thus, the continuous film 6 and the continuous sheet
When the continuous film 13 and the continuous sheet 13 cross each other, if the continuous film 6 and the continuous sheet 13 have directivity such as polarization in the width direction and the transport direction, layers having different properties can be formed on the front and back surfaces of the protective panel. it can.

As shown in FIG. 4C, the continuous sheet 13 sent to the continuous sheet hole 4d of the movable mold 4 is punched by the punching block 4e to the size of the final product 17a, and the sheet piece is cut. 13a.

Holes 6a are formed at predetermined intervals in the continuous film 6, and a transparent acrylic resin is injected between the continuous film 6 and the sheet piece 13a from the gate 3a through the holes 6a. The injected transparent acrylic resin fills the main cavity portion 4b while pressing the continuous film 6 and the sheet piece 13a against the fixed mold 3 and the movable mold 4 side. At this time, the transparent acrylic resin is first introduced into the edge cavity 4c, and flows into the cavity 3b and the main cavity 4b uniformly from the surroundings.
Therefore, the pressure distortion of the gate 3a does not concentrate on a part, and no polarization distortion occurs in the final product 17a.

Then, after the transparent acrylic resin is cured, FIG.
As shown in (a), the release work 8 and the base film 7 of the continuous film 6 are peeled off from the molded product 17 in which the continuous film 6 and the cut sheet piece 13a are integrated, and the transfer operation is completed. Thus, since the continuous sheet 13 is insert-molded and integrated with the protection panel P1, there is no need to remove the base film 7, and the manufacturing process can be simplified.

Next, the sprue 17b and the rim 17c are cut and removed from the molded product 17 using a predetermined jig. As shown in FIG. 6, a pair of cutters 18 is used as a cutting jig. Each of the cutters 18 has a cutting blade 18b erected on a pedestal 18a, and the cutting blade 18b is arranged according to the dimensions of the final product 17a.

Then, the molded product 17 is sandwiched between a pair of cutters 18, and the outer edge portion 17c is cut and removed.

In general, when a molded product is peeled off from a continuous film, a printing layer to be left on the base film is pulled, and a printed film called “crack” is formed around the molded product. However, in the present embodiment, the portion where the burrs have occurred can be removed together with the rim portion 17c, so that it is not necessary to perform the burrs and the production efficiency can be improved.

As shown in FIG. 7, the final product 17a from which the rim portion 17c has been cut off is formed on the protective panel P1 by forming an AR layer on the UV hard layers 9 and 14, which are AR underlayers.
Is molded. The AR layer can prevent reflection and improve visibility.

The protective panel P1 can be manufactured continuously by successively sending out the print pattern of the continuous film 6 and repeating the above-described steps.

In this embodiment, the UV hard layers 9 and 14 are used as the AR underlayer.
An AR layer may be formed on a transparent print layer.

[Second Embodiment] Next, a second embodiment of a method for manufacturing a protection panel for an electronic device display window according to the present invention will be described with reference to FIG. FIG. 8 is a side sectional view of a continuous film and a sheet. The same parts as those in the first embodiment will be denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 8, in the method for manufacturing a protection panel according to the present embodiment, a continuous film 21 and a continuous sheet 22 are used instead of the continuous film 6 and the continuous sheet 13 according to the first embodiment.

As shown in FIG. 8A, the continuous film 21
A release layer 8 made of a material having no adhesiveness, a UV hard layer 9 for improving the surface hardness, an anchor layer 10 for improving the fixability of printing, and The printing layer 11 and the adhesive layer 12 are laminated.
Further, as shown in FIG. 8B, the continuous sheets 22
A layer 24, a UV hard layer 14, a transparent base sheet layer 15 made of PET, and an adhesive layer 16 are laminated.

By forming the AR layer 24 on the continuous sheet 22 in advance, there is no need to perform AR processing on the back surface of the final product.
Production processes can be reduced. Note that AR processing is performed on the front side by the method described in the first embodiment or the like.

In each of the above-described two embodiments, the printed layer is formed only on the upper surface side of the protection panel. However, the printed layer may be formed on both surfaces. Further, it may be formed only on the lower surface side.

[0043]

As described above, when the protective panel is formed, the injected transparent acrylic resin flows into the main cavity through the rim cavity.
It is possible to prevent distortion that is likely to occur when flowing from a single gate.

Further, since the burrs of the printing layer generated when the base film of the continuous film is peeled off from the molded product are cut by removing the rim, the burrs are not required, and the production efficiency can be improved.

Further, the UV hard layer is formed as a surface AR underlayer,
In a method of manufacturing a protective panel for an electronic device display window used as a back surface AR underlayer, an AR layer is formed by performing an AR process described later thereon to form an AR layer that is difficult to form on the transparent acrylic resin of the protective panel. Can be formed stably.

Further, since the sheet is insert-molded and integrated with the protective panel when forming the protective panel, there is no need to remove the base film layer, and the manufacturing process can be simplified.

By forming the AR layer on the sheet in advance, the AR processing step on one side can be omitted, so that the number of production steps can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a protection panel formed by a manufacturing method according to a first embodiment.

FIG. 2 is an explanatory view of a stage in which a continuous film and a sheet are continuously passed through a fixed mold and a movable mold.

FIG. 3 is a side sectional view of a continuous film and a sheet.

FIG. 4 is an explanatory diagram of a method of manufacturing a protection panel.

FIG. 5 is an explanatory diagram of a method of manufacturing a protection panel.

FIG. 6 is an explanatory diagram of a method of manufacturing a protection panel.

FIG. 7 is an explanatory diagram of a method of manufacturing the protection panel.

FIG. 8 is a side sectional view of a continuous film and a sheet according to a second embodiment.

[Description of Signs] P1, P2: Protective panel 1a, 2a: Plate body 1b: Frame 1c: Display window 2b: One point 3: Fixed mold 3a: Gate 3b: Cavity 4: Movable mold 4b: Main cavity 4c ... Cavity part for edging part 4d ... Hole for continuous sheet 4e ... Punching block 5 ... Winding device 5a ... Sending roll 5b ... Winding roll 6,21 ... Continuous film 6a ... Hole 7 ... Base film 8 ... Release layer 9,14 … UV hard layer (hard coat layer) 10… Anchor layer 11… Printing layer 12, 16… Adhesive layer 13,22… Sheet 13a… Sheet piece 15… Base sheet layer 17… Molded product 17a… Final product 17b… Sprue 17c… Edge 18… Cutter 18a… Pedestal 18b… Cutting blade 24… AR layer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) B29L 9:00 B29L 9:00 F term (Reference) 4F206 AA21 AD09 AD10 AD20 AD35 AE10 AG03 AH42 JA07 JB13 JB19 JF05 JW23 JW50 5G435 AA17 FF01 KK05 LL07

Claims (2)

[Claims] 1. A main cavity portion formed by a fixed mold and a movable mold for molding a shape of a desired final product among molded products, and an edge portion formed around the entire periphery of the final product. A continuous film larger than the main cavity portion in which at least a release layer, a hard coat layer or a surface AR underlayer comprising a print layer and an adhesive layer are laminated on a base film in a cavity composed of an edge portion cavity portion for While inserting a sheet having at least a back surface AR underlayer consisting of at least a hard coat layer or a print layer, a base sheet layer, and an adhesive layer; and combining the fixed mold and the movable mold with a predetermined Injecting a transparent acrylic resin between the continuous film and the sheet from a gate to form the molded article; A step of peeling the release layer of the continuous film and the base film layer; a step of cutting and removing an edge portion of the molded article to produce a final molded article; Forming an AR layer thereon, a method for manufacturing a protective panel for an electronic device display window. 2. A main cavity formed by a fixed mold and a movable mold for molding a shape of a desired final product among molded products, and an edge formed around the entire periphery of the final product. An AR underlayer consisting of a release layer, a hard coat layer or a print layer on at least the base film,
While passing a continuous film larger than the main cavity portion laminated adhesive layer, at least AR layer,
Inserting a sheet having a base sheet layer and an adhesive layer, and injecting a transparent acrylic resin between the continuous film and the sheet from a predetermined gate after matching the fixed mold and the movable mold. Forming the molded article, peeling the release layer of the continuous film, the base film layer from the molded article, cutting and removing the edge of the molded article, the step of manufacturing the final molded article, A method for manufacturing a protective panel for an electronic device display window, comprising: