JP3238361B2 - Method for manufacturing button panel having small projections - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a button panel having a small projection formed for Braille which can be used for home electric appliances such as rice cookers and washing machines, and automobile parts such as a heater control panel. The present invention relates to a method of manufacturing a button panel having a small projection in which an insert sheet having a portion and a resin molded product are integrally bonded together with the molding of the resin molded product.

[0002]

2. Description of the Related Art Conventionally, as a method for manufacturing a button panel having a small projection for braille used in home electric appliances such as a rice cooker and a washing machine, first, an insert sheet and an injection mold are prepared. I do. The insert sheet has a button ridge having a small projection for braille.
On the other hand, the injection molding die has a button concave portion corresponding to the button raised portion of the insert sheet and a small concave portion formed on the inner surface of the button concave portion so as to have a shape matching the small projection for braille of the insert sheet. It has an insert sheet fixing mold having a concave portion for a protrusion, and a cavity forming mold for forming a cavity into which a molding resin is injected between the insert sheet and the back surface of the insert sheet. Next, at the same time as fitting the button ridge of the insert sheet into the button recess of the injection molding die, the small projection for braille of the insert sheet is also fitted into the small projection recess of the injection molding die. After closing the mold, inject molding resin into the cavity,
There is a type in which a molding resin is integrally bonded to the back surface of the insert sheet. The recess for the small protrusion of this conventional injection mold is a recess having a space in which the shape of the small protrusion for braille of the insert sheet matches.

[0003]

Conventionally, both the small projections for braille of the insert sheet and the small recesses of the injection mold are extremely small. In particular, the small recess of the injection mold is formed of the button recess. It is hard to see near the bottom. Therefore, if the fitting measurement is slightly wrong, the small projections for braille of the insert sheet and the small recesses of the mold for injection molding will be misaligned, and the small projections for braille of the insert sheet will be displaced. It is difficult to accurately align and fit the small recess of the injection mold. For this reason, if the injection mold is closed with the fitting being incomplete, the braille small protrusions on the insert sheet will be crushed or deformed, resulting in a button panel with low commercial value. Would. Also, if it is re-inserted many times to accurately align and insert, the small projections for Braille will be damaged due to friction or collision between the insert sheet and the mold, and it will take time and effort. Take it. For this reason, the productivity of the button panel decreases.

An object of the present invention is to provide a method of manufacturing a button panel having small projecting portions with high productivity without crushing, deformation, and scratching of the small projecting portions in the button raised portion.

[0005]

In order to achieve the above object, a method of manufacturing a button panel having a small projection according to the first aspect of the present invention includes a button projection and a braille small projection on the surface. A small space larger than the total volume of the formed insert sheet, the button recess corresponding to the button ridge of the insert sheet, and the braille small protrusion of the insert sheet formed on the inner surface of the button recess. Using an insert sheet fixing mold having a protrusion retreating concave portion and a portion where the molding resin is not injected, and an injection mold having a cavity forming mold for forming a cavity between the back surface of the insert sheet, insert seat button ridges of the insert seat as Braille small projection of the insert sheet is accommodated in the small protrusion retraction recess of the insert sheet fixed mold Fitting the button recess of Teikin type, after mold closing the mold, and injection molding resin into the cavity, and configured to integrate adhere the molded resin on the back surface of the insert seat.

According to a second aspect of the present invention, there is provided a method of manufacturing a button panel having a small projection, comprising the steps of:
A button recess corresponding to the button protrusion to be formed on the insert sheet; and a small protrusion recess corresponding to the braille small protrusion to be formed on the button protrusion of the insert sheet formed on the inner surface of the button recess. A cavity is formed between the insert sheet fixing mold having the mold and the back surface of the insert sheet, and a cavity is formed having a pushing protrusion that matches the button recess and the small protrusion recess of the insert sheet fixing mold. Using an injection mold having an indenting mold, an insert sheet is introduced between the insert sheet fixing mold and the cavity forming and indenting mold, and when closing the mold, the button recess and the small protrusion are used. push on the use recess portions of the insert sheet in the push protrusions to form a button ridges and braille for the small projections in the insert seat, By injection molding resin into Yabiti, configured as Braille small projections on the surface and the button ridges to integrate adhere the molded resin on the back surface of the insert sheets formed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings.

First, the layer structure and material of the insert sheet used in the manufacturing method of the present invention will be described. The insert sheet 1 has a button raised portion 3 having a braille small projection 2 formed thereon. As insert sheet 1,
There is a film in which a picture layer 19 or an adhesive layer is formed on a base film 16. The base film 16 side is the front surface, and the picture layer 19 or the adhesive layer side is the back surface 18. As a material of the base film 16, a transparent plastic film or plastic sheet such as polyethylene terephthalate resin or polycarbonate resin may be used. The thickness of the base film 16 may be 100 μm to 250 μm. A matte surface may be formed by forming a hairline design on the surface of the base film 16 or forming a matte design by forming an uneven layer with a pigment ink. Hairline designs and mat designs may be partially formed. An antibacterial printing layer may be formed on the surface of the base film 16 with an ink containing an antibacterial agent.

The picture layer 19 is formed of, for example, characters, numerals, figures, symbols, and patterns formed on the front panel of an audio or television, a washing machine, a rice cooker, or the like, or on the surface of a meter panel or an audio panel of an automobile. It is a layer that expresses etc. The pattern layer 19 includes an ink using a resin binder, a pigment or dye as a colorant, and an additive. The pattern layer 19 may be one that develops a metallic color such as a resin binder, a metallic powder, or a pearl pigment. Pigments and dyes come in various colors. The picture layer 19 may have a transparent ink portion made of a resin binder, a transparent pigment, or the like. The picture layer 19 may have a light-shielding ink portion formed by using a resin binder and a metal pigment or an inorganic pigment having a concealing property. The picture layer 19 is formed by using a metal material such as a metal, a metal oxide, a metal fluoride, a metal halide, a metal nitride, and a metal sulfide to form a metal color portion formed by vacuum deposition, sputtering, ion plating, or the like. It may be formed. The pattern by the pattern layer 19 may be formed at a position corresponding to the button raised portion 3 (see FIG. 10).

The adhesive layer is a layer for integrally bonding each of the above layers to the surface of a resin molded product 21 which has been cooled and solidified after injecting a molding resin 9 described later. When the resin sheet 21 is molded with a polyacrylic resin and the insert sheet 1 is adhered to the surface of the resin molded article 21 at the same time, a polyacrylic resin may be used as the adhesive layer. When the material of the molding resin 9 to be injected is a polystyrene resin, a polycarbonate resin, a styrene copolymer resin, or a polystyrene blend resin, a polyacryl resin, a polystyrene resin, A polyamide resin or the like may be used. As a method of forming the adhesive layer,
There are coating such as gravure coating, roll coating, and comma coating, and printing such as gravure printing and screen printing. The dry film thickness of the adhesive layer is generally 1 μm to 5 μm.

A specific example of a method for manufacturing a button panel having a small projection for braille according to the first aspect of the present invention will be described below. First, an insert sheet 1 having a button raised portion 3 and a braille small protrusion 2 formed on the surface thereof, a button concave portion 4 corresponding to the button raised portion 3 of the insert sheet 1, and a braille small protrusion of the insert sheet 1 An insert sheet fixing mold 6 having a small protrusion retreating recess 5 formed on the inner surface 17 of the button recess 4 so as to have a space larger than the total volume of the section 2 in a mold portion where the molding resin 9 is not injected; An injection mold having a cavity forming mold 7 for forming the cavity 8 between the insert sheet 1 and the back surface 18 is used (see FIG. 1), and the braille small projections 2 of the insert sheet 1 are inserted. The button raised portion 3 of the insert sheet 1 is fitted into the button concave portion of the insert sheet fixing die 6 so as to be accommodated in the small protrusion retracting concave portion 5 of the sheet fixing die 6. At this time, if the surface of the button raised portion 3 of the insert sheet 1 is brought into close contact with the inner surface 17 of the button concave portion of the insert sheet fixing die 6, displacement is less likely to occur, and there is a sense of stability, which is effective (see FIG. 2).

The insert sheet 1 includes a plurality of button raised portions 3 and a plurality of braille small protrusions 2 formed on the surface thereof. The braille small protrusions 2 and the button raised portions 3 are preferably formed using a heating device, a press die, or the like. Examples of the shape of the braille small protrusion 2 include a shape having a height of 0.1 to 1.0 mm and a diameter of a horizontal cross section of 0.3 to 2.5 mm. As the shape of the button raised portion 3, for example,
There are things that rise up in a gentle curved shape. The shape of the button concave portion 4 of the insert sheet fixing die 6 of the injection molding die is a shape that matches the button raised portion 3 and the braille small protrusion 2 of the insert sheet 1. As the shape of the small protrusion retreating recess 5 of the insert sheet fixing die 6, for example, one small Braille small protrusion 2 is accommodated without contacting the inner surface of one small protrusion retreating recess 5. There is such a shape. As another shape, a plurality of small projections 2 for Braille are all formed into one small projection recess 5.
There is a shape that can be accommodated without contacting the inner surface of the.

Next, after closing the mold, the cavity 8 is closed.
Molding resin 9 is injected into the back surface 1 of the insert sheet 1
A molding resin 9 is integrally adhered to 8 (see FIGS. 3 and 4). By closing the mold, insert sheet 1
The cavity 8 was formed at a location excluding the button raised portion 3 having the small braille projection 2, and the button raised portion 3 having the plurality of braille small projections 2 of the insert sheet 1 was formed. The portion may be sandwiched between the insert sheet fixing mold 6 and the cavity forming mold 7 to be in a sealed state (see FIG. 3). Cavity 8
May be formed in either the insert sheet fixing mold 6 or the cavity forming mold 7. By injecting the molding resin 9 from the injection port 10 into the cavity 8, the resin molded product 21 in which the through-hole 11 is formed at a position corresponding to the button ridge 3 of the insert sheet 1 is formed on the back surface 18 of the insert sheet 1. Alternatively, they may be integrally bonded to a portion excluding the button raised portion 3 (see FIGS. 9 and 10). As the molding resin 9, a styrene copolymer resin such as acrylonitrile / styrene resin or acrylonitrile / butadiene / styrene resin, or another type of polycarbonate resin, polystyrene blend resin, or polystyrene resin may be used.

A specific example of a method for manufacturing a button panel having a small braille projection 2 according to the second invention will be described below. First, the button recesses 4 corresponding to the button protrusions 3 to be formed on the insert sheet 1 and the button recesses 4 so as to match the small braille projections 2 to be formed on the button protrusions 3 of the insert sheet 1 are formed. The cavity 8 is formed between the insert sheet fixing mold 13 having the small protrusion concave portion 12 formed on the inner surface 17 in the mold portion where the molding resin 9 is not injected and the back surface 18 of the insert sheet 1. The insert sheet 1 includes an injection molding die having a cavity forming and pressing die 15 having a pressing protrusion 14 that matches the button concave portion 4 and the small protrusion concave portion 12 of the insert sheet fixing die 13. After using the insert sheet 1 between the insert sheet fixing mold 13 and the cavity forming and pressing mold 15 (see FIG. 5),
When the mold is closed, a part of the insert sheet 1 is pushed into the button recess 4 and the small projection recess 12 by the pushing projection 14, and the button projection 3 and the braille small projection are formed on this surface. The button ridge 3 and the small braille projection 2 are formed on the insert sheet 1 on which the insert 2 is formed (see FIGS. 6 and 7).

The insert sheet 1 is provided with a small projection 2 for braille.
And the button raised portion 3 are not formed. The shape of the button concave portion 4 of the insert sheet fixing die 13 of the injection molding die matches the button raised portion 3 to be formed on the insert sheet 1. For example, there is a concave shape having a gentle concave surface. There may be a plurality of button recesses 4. The shape of the small protrusion concave portion 12 of the insert sheet fixing die 13 of the injection molding die matches the small braille small protrusion 2 to be formed on the insert sheet 1. For example, there is a button recess having a depth from the inner surface 17 of 0.1 to 1.0 mm and a diameter of the button recess inside the inner surface 17 of 0.3 to 2.5 mm. By closing the mold, the pressing projection 1 of the cavity forming and pressing mold 15 is pressed.
4 approaches and closely adheres to the button recess 4 of the insert sheet fixing mold 13, and a part of the insert sheet 1 is pushed into the button recess 4 of the insert sheet fixing mold 13,
The button ridge 3 is formed on the insert sheet 1. At the same time, in the button recess of the insert sheet fixing mold 13, the pushing protrusion 14 comes close to and closely contacts the small projection recess 12, and a part of the button bulge 3 of the insert sheet 1 is inserted into the insert sheet fixing mold. 13 small projection recesses 1
2, the braille small projections 2 are formed on the button ridges 3 of the insert sheet 1. The button ridge 3 formed on the insert sheet 1 may be plural. By closing the mold, a cavity 8 is formed in a portion of the insert sheet 1 excluding the button raised portion 3 having the small braille projection 2, and the insert sheet 1
The portion where the button raised portion 3 having the braille small protrusion 2 is formed may be sandwiched between the insert sheet fixing mold 13 and the cavity forming and pressing mold 15 to be in a sealed state. The concave portion 20 for forming the cavity 8 may be formed in either the insert sheet fixing mold 13 or the cavity forming mold 7.

Next, the molding resin 9 is injected into the cavity 8, and the molding resin 9 is integrally bonded to the back surface 18 of the insert sheet 1 having the button raised portion 3 and the braille small projections 2 formed on the surface. (See FIG. 8). By injecting the molding resin 9 from the injection port 10 into the cavity 8, the through hole 1 is formed at a position corresponding to the button protrusion 3 of the insert sheet 1.
1 is formed on the insert sheet 1
The rear surface 18 may be integrally bonded to a portion other than the button raised portion 3 (see FIGS. 9 and 10).
The molded resin 9 is made of acrylonitrile / styrene resin or acrylonitrile / butadiene / resin.
It is preferable to use a styrene copolymer resin such as a styrene resin, or another system such as a polycarbonate resin, a polystyrene blend resin, or a polystyrene resin.

[0017]

As described above, the method for manufacturing a button panel having small projections according to the first aspect of the present invention includes a button raised portion, an insert sheet having a braille small projection formed on the surface thereof, and an insert sheet. A button recess corresponding to the button raised portion and a small protrusion retreating recess in a space larger than the total volume of the Braille small protrusion of the insert sheet formed on the inner surface of the button recess are formed on the portion where the molding resin is not injected. An injection mold having an insert sheet fixing mold having a cavity and a cavity forming mold for forming a cavity between the back surface of the insert sheet and a small projection for braille of the insert sheet. The button ridge of the insert sheet is fitted into the button recess of the insert sheet fixing mold so as to be accommodated in the small protrusion retracting recess of the insert sheet fixing mold, After mold closing the mold, by injection molding resin into the cavity, and so as to integrate adhere the molded resin on the back surface of the insert seat. Therefore, compared with the braille small protrusion of the insert sheet, the space of the small protrusion retreat recess of the injection mold is larger, so that the small protrusion retreat recess of the injection mold is less visible. Even
In addition, even if there is a slight error in the eye measurement, the positional deviation of the braille small protrusions of the insert sheet can be absorbed by the small protrusion retreating recesses of the injection molding mold, and can be securely and easily accommodated. it can. Therefore, since the mold for the injection mold can be closed after being securely housed , the small projection for braille of the insert sheet is not crushed or deformed by closing the mold. can get. Also, since it can be easily inserted, it is not necessary to re-insert it many times, which saves labor and time, not only improves the productivity of the button panel, but also eliminates friction and repeated collision between the insert sheet and the mold. Therefore, no scratch occurs on the braille small projection.

Further, according to a second aspect of the present invention, there is provided a method of manufacturing a button panel having a small projection, comprising: an insert sheet; a button recess corresponding to a button ridge to be formed on the insert sheet; and an inner surface of the button recess. Forming a cavity between an insert sheet fixing mold having a small protrusion concave portion corresponding to a braille small protrusion to be formed in a button ridge of the formed insert sheet, and a cavity between the back surface of the insert sheet and Using an injection molding die having a cavity forming and a pressing die having a pressing convex portion corresponding to the button concave portion and the small projecting portion concave portion of the insert sheet fixing die, the insert sheet fixing die and the cavity forming. An insert sheet is introduced between the mold and the press-in mold, and when the mold is closed, the insert sheet is inserted into the recess for the button and the recess for the small protrusion. Push the part with the push protrusions to form a button ridges and braille for the small projections in the insert seat, by injection molding resin into the cavity, to integrate adhere the molded resin on the back surface of the insert seat Like that. Therefore, the braille small protrusions of the insert sheet are formed when the mold of the injection molding die is closed, and the braille small protrusions of the insert sheet are visually measured or the like for the small protrusions of the injection mold. There is no need to fit in the recess. For this reason, the braille of the insert sheet
The small projections cannot be crushed or deformed. Also, it cannot be re-inserted many times, it takes less time and effort, not only improves the productivity of the button panel, but also reduces the friction between the insert sheet and the mold and the repeated collision, so the braille is small. There is no scratch on the projection.

[Brief description of the drawings]

FIG. 1 is a conceptual cross-sectional view showing one process in an example of a method for manufacturing a button panel having a small Braille projection according to the present invention.

FIG. 2 is a conceptual cross-sectional view showing one step in an example of a method for manufacturing a button panel having a small Braille projection according to the present invention.

FIG. 3 is a conceptual cross-sectional view showing one step in an example of a method for manufacturing a button panel having a small Braille projection according to the present invention.

FIG. 4 is a conceptual cross-sectional view showing one step of an example of a method for manufacturing a button panel having a small Braille projection according to the present invention.

FIG. 5 is a conceptual cross-sectional view showing one step of an example of a method of manufacturing a button panel having a small Braille projection according to the present invention.

FIG. 6 is a conceptual cross-sectional view showing one step of an example of a method for manufacturing a button panel having a small Braille projection according to the present invention.

FIG. 7 is a conceptual cross-sectional view showing one step of an example of a method for manufacturing a button panel having small braille projections according to the present invention.

FIG. 8 is a conceptual cross-sectional view showing one step of an example of a method for manufacturing a button panel having a small Braille projection according to the present invention.

FIG. 9 is a conceptual plan view showing an example of a button panel having a braille small protrusion according to the present invention.

FIG. 10 is a conceptual plan view showing an example of a button panel having a braille small protrusion according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Insert sheet 2 Braille small protrusion 3 Button raised portion 4 Button recess 5 Small protrusion retreat recess 6 Insert sheet fixing die 7 Cavity forming die 8 Cavity 9 Molding resin 10 Injection port 11 Through hole 12 Small protrusion Recess for insert 13 insert die fixing die 14 indentation projection 15 cavity forming and indentation die 16 base film 17 inner surface 18 back surface 19 picture layer 20 concave portion 21 resin molded product

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B29C 45/00-45/74 H01H 11/00 E B29L 31:34

Claims (2)

(57) [Claims] 1. An insert sheet having a button raised portion and a braille small protrusion formed on the surface thereof, a button concave portion corresponding to the button raised portion of the insert sheet, and an insert sheet formed on the inner surface of the button concave portion. Forming a cavity between an insert sheet fixing mold having a small protrusion evacuation recess in a space larger than the total volume of the braille small protrusion in a portion where the molding resin is not injected, and a back surface of the insert sheet And the injection-molding mold having the mold, and the button ridge of the insert sheet is inserted into the insert sheet so that the braille small protrusion of the insert sheet is accommodated in the small protrusion retreat recess of the insert sheet fixing mold. After fitting into the button recess of the fixed mold and closing the mold, the molding resin is injected into the cavity and the back of the insert sheet Method for producing a button panel having a small projection portion, characterized in that to integrate bonded molding resin. 2. An insert sheet, a button recess corresponding to a button protrusion to be formed on the insert sheet, and a small braille projection to be formed on the button protrusion of the insert sheet formed on the inner surface of the button recess. A cavity is formed between the insert sheet fixing mold having a small protrusion concave portion that matches the shape of the insert sheet, and a cavity is formed between the insert sheet fixing mold and the button concave portion and the small protrusion concave portion of the insert sheet fixing mold. Injecting an insert sheet between the insert sheet fixing mold and the cavity forming and pressing mold using an injection molding mold having a cavity forming and pressing mold having a pressing convex portion, and closing the mold. A part of the insert sheet is pushed into the recess for the button and the recess for the small protrusion with the pushing protrusion, and the button is inserted into the insert sheet. Forming a raised portion and the Braille small projections, by injection molding resin into the cavity, braille small projections on the surface to integrate adhere the molded resin on the back surface of the insert sheets formed a button ridges A method for manufacturing a button panel having a small projection.