JPH01270974A - Preparation of colored light pervious display body - Google Patents

Abstract

PURPOSE:To inexpensively prepare the title display body, by a method wherein a light pervious film layer having a desired color, a heat absorbing layer and a light impervious film layer are successively formed to the surface of a light pervious base body having a desired shape and the light impervious film layer and the heat absorbing film layer are melted and removed by a heat ray irradiation means. CONSTITUTION:A film layer 4 having a desired color composed of light pervious paint is formed to the surface of a light pervious base body 3 molded into a desired shape and heat absorbing paint is applied to the surface of said layer 4 to form a heat absorbing film layer 5. Further, light impervious paint is applied to the film layer 5 to form a light impervious film layer 6. Subsequently, the light impervious film layer 6 is irradiated with heat rays by a heat ray irradiation means, and the desired part of the light impervious film layer 6 and the heat absorbing film layer 5 under said part are melted and removed. As a result, a colored light pervious display body having excellent decorative effect can be inexpensively and accurately prepared.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a colored translucent display for use in operation buttons, etc. of a front panel of an automobile.

[Conventional technology]

In recent years, there has been a trend toward luxury goods in Japan, and there is a tendency for decorativeness to be emphasized.

For example, in automobiles, a light source is placed inside the front panel operation buttons, and the light from this light source makes the pictures, letters, etc. formed on the button surface stand out, increasing the decorativeness. There is something.

Usually, such buttons are made by forming a light-transparent coating layer in the color of the picture or text that you want to appear on the surface of a light-transparent resin base, and then applying a light-opaque coating on top of that, except for the pictures and text. It is obtained by forming a membrane layer.

As a method for forming a colored transparent display body as described above,
Conventionally, there are methods using a two-color resin molding method, a method using screen printing, and a method using a method in which a metal layer is formed as a light-opaque layer by vapor deposition or the like and this metal layer is removed with a laser.

[Problem to be solved by the invention]

However, the conventional method described above has the following problems.

■ The two-color resin molding method has the problem that when forming discontinuous pictures or letters, the molds and processes become complicated and the manufacturing cost becomes extremely high.

■ With screen printing, the edges of pictures and letters may become blurred, which poses a problem in terms of decoration.

■ Methods of forming a metal layer by vapor deposition or the like require vacuum equipment and are expensive to manufacture.

In view of the above circumstances, it is an object of the present invention to provide a method for manufacturing a colored transparent display that can produce a colored transparent display with excellent decorative properties at low cost and with high precision. .

[Means to solve the problem]

In order to achieve such an object, this invention forms a coating layer of a desired color made of a light-transmitting paint on the surface of a light-transmitting substrate formed into a desired shape, and exposes the surface of this coating layer to light. A method for producing a colored light-transmitting display, comprising forming an impermeable film layer and then removing a desired portion of the light-impermeable gland layer using a heat ray irradiation means, the method comprising: forming an impermeable film layer with a coating material; The gist of the present invention is a method for producing a colored translucent display, characterized in that it is formed by applying a heat-absorbing coating material, and at least the portion in contact with the coating layer is formed from a heat-absorbing coating material.

[For production]

With the above configuration, it is not necessary to form a metal film layer by a PVD method such as vacuum evaporation, and the light-impermeable film layer can be easily removed by heat irradiation means.

〔Example〕

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

FIGS. 1(a) to 1(el) show one embodiment of the method for manufacturing a colored transparent display according to the present invention in the order of manufacturing steps.

■ As shown in Figure 1 (a), the body l is made of black resin,
A molded product 3 whose cap 2 is made of a light-transmitting resin is prepared. Incidentally, dirt on the surface of the molded product 3 should be removed by a method such as fluorocarbon cleaning.

(2) As shown in FIG. 1(b), paint is applied to the surface of the molded article 3 to form a light-transmitting coating layer 4.

(2) As shown in FIG. 1 (C1), a heat-absorbing paint is applied to the surface of the light-transmitting paint layer 4 to form a heat-absorbing paint layer 5.

(2) As shown in FIG. 1(d), a light-impermeable coating layer 6 is formed by applying a light-impermeable paint.

■ As shown in FIG. 1(e), heat rays are irradiated onto the light-impermeable coating layer 6 by a heat ray irradiation means, and the desired portion of the light-opaque coating layer 6 and the heat-absorbing coating layer below it are heated. 5 is dissolved and removed.

In the manner described above, the switch button 7 of an automobile air conditioner as shown in FIG. 2 can be formed. This switch button 7 has the light-opaque coating layer 6 and heat-absorbing coating layer 5 removed from the part with the letters A/C, so the internal power is turned on as shown in Figure 1(e). This allows light to pass through only from the text, making the text stand out.

The paint for forming the light-transmissive coating N4 is not particularly limited as long as it is a color that is desired to stand out as a picture or text, but it must be a white color with heat-reflective properties and be non-urethane-based. Examples include two-component acrylic resin paints that use a curing agent. The coating method is preferably electrostatic coating. Further, it is preferable that the thickness of the coating layer exceeds 8. In other words, if it is less than 8-, air will be drawn into the coating layer when the coating is cured, and the thickness of the coating layer will become thinner only in that area. When removing the film 5, pinholes may be generated, which may cause problems in the quality of the product.

A graph showing the luminance (Ln+) of the lamp used inside the switch button 7 and the light transmittance of the light transmitting coating layer 4 is shown in FIG. In addition, in FIG. 3, the hunting area is a light-transmissible area, and the other area is a light-transmissible area. As shown in the figure, when the thickness of the transparent coating layer 4 is 8 gm, light is transmitted to the outside through the transparent coating layer 4 even when a lamp with a brightness of 2.5 Lm is used.

By the way, a lamp with a brightness of 2.5Lm has a long lifespan of 15,000 hours, whereas a lamp with a high brightness such as a lamp with a brightness of 6Lm has a lifespan of 100 hours.
The time is about 0 hours, and you have to be careful about the temperature rise. Therefore, it is preferable that the thickness of the light-transmitting coating layer 4 is as thin as possible and that the brightness of the lamp is lowered.

The paint forming the heat-absorbing coating layer 5 is not particularly limited, but may include a two-component acrylic resin paint or metal foil that has a black heat-absorbing color and uses a non-urethane curing agent. Examples include paints containing paint. The coating method is preferably electrostatic coating. In addition, the thickness of the coating film is
Approximately 5Jna to 20I1m is preferable. If the temperature is less than 5, the removal performance by heat irradiation means tends to deteriorate;
0I! If it exceeds Im, the appearance may be adversely affected, for example, when the light-impermeable coating layer 6 is made matte.

As the paint forming the light-impermeable coating layer 6, a two-component acrylic resin paint using a non-urethane curing agent can be mentioned. The coating method is preferably electrostatic coating. Further, it is preferable that the total thickness of the coating film including that of the heat-absorbing coating layer 5 is about 30 -.

Incidentally, FIG. 4 shows the state of light leakage to the outside of the light-impermeable film layer 6 when a lamp with a brightness of 6.5 Lm is placed inside the switch button 7.

In FIG. 4, the hatched areas are areas where there is no light leakage, and the other areas are areas where there is light leakage. As shown in the figure, if the total thickness of the heat-absorbing coating N5 and the light-impermeable coating layer 7 is 30 pm or more, no light leaks to the outside.

The heat ray irradiation means is not particularly limited, but includes, for example, laser beams such as a YAG laser and a carbon dioxide laser.

The method for producing a colored transparent display according to the present invention is not limited to the above embodiments. For example, in the above embodiments,
The colored display body was a switch button, but even a plate-shaped body,
It does not matter if it has a complicated uneven shape. In the above embodiment, the heat-absorbing paint layer and the light-impermeable paint layer are formed using different paints, but the heat-absorbing paint layer may also serve as both. do not have.

〔Effect of the invention〕

As described above, the method for producing a colored transparent display according to the present invention involves forming a coating layer of a desired color made of a light-transmitting paint on the surface of a light-transmitting substrate formed into a desired shape, and A method for producing a colored transparent display, comprising forming a light-impermeable film layer on the surface of the layer, and then removing a desired portion of the light-impermeable film layer using heat irradiation means. Since the transparent film layer is formed by applying a paint, and at least the portion in contact with the paint film layer is formed with a heat-absorbing paint, a colored transparent display with excellent decorative properties can be produced at low cost and with high precision. Obtainable.

[Brief explanation of the drawing]

FIGS. 1(a) to 1(e) are explanatory diagrams illustrating one embodiment of the method for manufacturing a colored transparent display according to the present invention in the order of steps, and FIG. 1(a) is a side cross-sectional view of a molded product. The figure (bl is a side cross-sectional view showing a state in which a light-transmitting coating layer is formed on a molded product, and fc in the same figure is a side sectional view showing a state in which a light-transmitting coating layer is formed on a molded product. The same figure (dl is a side cross-sectional view showing a state in which a light-impermeable coating layer is formed on a heat-absorbing coating layer, and the same figure (e) is a side sectional view showing a state in which a light-impermeable coating layer is formed on a heat-absorbing coating layer. Fig. 2 is a side cross-sectional view showing the state in which the light-impermeable coating layer and the heat-absorbing coating layer have been removed.
A perspective view of the air conditioning switch button of an automobile completed through the process of (Q). Figure 3 shows the light of the light-transmitting coating layer in relation to the luminance of the lamp and the thickness of the light-transmitting coating layer. Graph illustrating transmittance. FIG. 4 is a graph illustrating each coating film and light transmittance when a lamp with a luminance of 6.5 Lm is used. 3... Molded product (light-transparent substrate) 4... Light-transparent coating layer 5... Heat-absorbing coating layer 6... Light-impermeable coating layer 7... Switch button ( Colored translucent display) Figure 1 Figure 2

Claims (1)

[Claims] (1) A coating layer of a desired color made of a transparent paint is formed on the surface of a transparent substrate formed into a desired shape, and a light-impermeable coating layer is formed on the surface of this coating layer. A method for producing a colored light-transmitting display in which a desired portion of a light-impermeable film layer is removed by heat irradiation means, the method comprising: forming the light-impermeable film layer by applying a paint; 1. A method for producing a colored translucent display, characterized in that a portion in contact with a coating layer is formed with a heat-absorbing paint.