JPH02168294A - Manufacture of reflecting surface of marker - Google Patents

Abstract

PURPOSE:To strengthen the reflecting power of the reflecting surface by applying a urethane paint to the marker surface being the reflecting surface, spraying glass beads to its coated surface with a spray gun, etc., and thereafter, baking the sprayed lass beads. CONSTITUTION:A urethane paint 2 is applied to the marker surface 1 and the marker is shown clearly by a color of red and yellow, etc., and also, this paint has an action for fixing glass beds 3 of a reflecting material onto the marker surface 1. The urethane paint 2 becomes a flexible coated surface even after drying, therefore, even if it is coated to the marker surface surface formed by a flexible raw material of rubber, etc., it is taken well to its surface, and even if the marker is deformed, the coated surface does not peel off. In such a way, in the marker formed by a flexible raw material of rubber, etc., as for the reflecting surface which is manufactured by using the urethane coating 2 and spraying the glass beads 3, the glass beads 3 scarcely fall off and the reflecting surface becomes strong against a shock.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a reflective surface of a road sign or other sign having a reflective surface.

(Prior art) Among the signs, - most signs permanently installed on roads;
2. Description of the Related Art Reflective sign devices for automobiles, signs used at road construction sites, etc. are equipped with reflective surfaces so that the contents of the sign can be confirmed even at night. Conventionally, this 11-sided surface was coated with fluorescent paint or aluminum flakes [
It is manufactured by applying a large amount of urethane paint, pasting reflective tape, or by processing and molding the back side of a transparent plate made of plastic or the like into irregularities and applying paint to the back side.

(Problem to be Solved by the Invention) However, the above method has the following problems.

First, when a reflective surface formed by coating a fluorescent paint is exposed to lights from a car or other vehicle at night, only the fluorescent color becomes raised and becomes indistinct, making it difficult for the eyes to recognize what the sign is trying to convey. It has the disadvantage of being dull.

Further, when exposed to sunlight, fluorescent paint is easily decomposed by ultraviolet rays, so signs installed outdoors have the disadvantage that as the fluorescent paint deteriorates, the originally weak reflective power further decreases. Next, reflective surfaces formed by applying urethane paint mixed with aluminum flakes are often coated with the aluminum flakes mixed in as a reflective material, and the reflective surface cannot fully demonstrate its reflective power. There is a drawback. In addition, the reflective surface formed by the method of pasting reflective tape can be pasted in step 4! It is troublesome to cut and apply reflective tape to match the shape of the sensor body. In addition, the unit price of reflective tape itself is high.
Furthermore, since the sign body made of flexible material such as rubber easily deforms when external force is applied, the method of pasting reflective tape is to connect the adhesive surface of the pasted reflective tape to the sign body. The drawback is that a gap is created between the adhesive surface and the adhesive surface, allowing air or water to enter, making it easy to peel off. Further, a reflective surface manufactured by a method in which the back surface of a transparent plate made of plastic or the like is made uneven and a paint is applied to the back surface has a problem in that the entire surface is easily broken into pieces by a slight impact.

Therefore, the present invention overcomes the above-mentioned problems of the prior art, and has a reflective surface that has a stronger reflective power than the conventional one and does not deteriorate over time (in addition, it is resistant to impact and The object of the present invention is to provide a method of manufacturing a reflective surface at low cost.

(Means for solving the problem) Therefore, in the present invention,
The manufacturing method for the reflective surface of a sign is as follows: First, urethane coating #1 is applied to the sign surface that will become the reflective surface, glass beads are sprayed before the urethane paint dries, and then the sign surface is placed in a dryer. The film is dried by heating at a temperature in the range of 70°C to 120°C for 20 to 40 minutes, and then cooled.

(Embodiments) Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a perspective view showing the external appearance of a sign manufactured by the method for manufacturing a reflective surface according to the present invention, and FIG. 2 is an enlarged sectional view of the reflective surface taken along line A-A in FIG. 1.

As shown in Figures 1 and 2, first, apply urethane paint 2 to the reflective surface 1 using a spray gun, brush, etc.(^)0 Next, apply urethane paint 2. Immediately after spraying the glass beads 3 evenly onto the sign surface 1 using a spray gun 4, etc. (8) 0 Next, the sign surface 1 sprayed with the glass beads 3 is placed in a steam dryer (
The applied urethane paint 2 is dried by heating at 90° C. for 30 minutes using a hot air dryer (not shown) or a hot air dryer (not shown). As a result, the glass beads 3 sprayed onto the urethane paint 2 are also firmly baked onto the sign surface l as the urethane paint 2 dries (C
), and finally, the sign painted as above is left to cool to room temperature (0).

The reflective surface is manufactured through the above steps (A), (B), (C), and (D).

Next, the action of the urethane paint 2 used in the present invention will be explained. Urethane coating FJ2 is applied to the sign surface l and is colored red, yellow, etc. 4! In addition to clearly indicating the identification, it also has the function of fixing the reflective glass beads 3 on the marking surface l. Urethane paint 2 remains a flexible painted surface even after drying, so even when applied to the surface of a sign made of flexible materials such as rubber, it will stain the surface well and the painted surface will not peel off even if the sign is deformed. Therefore, the reflective surface of a sign made of a flexible material such as rubber, which is manufactured by spraying glass beads using urethane paint, can be made resistant to impact so that the glass beads are unlikely to fall off. In addition, the adoption of glass beads 3 is 4! as shown in Figure 2! R
The purpose is to enhance the reflection effect by dispersing the lights of automobiles, etc. on the reflective surface I by the curved surface 5 of the glass beads 3 as shown by the arrow I.

In addition, in this example, the heating temperature in the drying step (C) is
Although the heat treatment time is set at 90°C2 for 30 minutes, it is not limited to this, and as a result of experiments, the heating temperature is 70°C to 120°C, and the heat treatment time is 20 to 40 minutes. It has been proven that it is sufficient as long as it is within the range of .

(Effects of the Invention) In the present invention, urethane paint is applied to the sign surface to be used as a reflective surface, glass beads are sprayed onto the coated surface using a spray gun, etc., and then the sign surface to be used as a reflective surface is coated with a steam dryer or hot air It is made by drying in a dryer and baking the blown glass beads. As a result, the reflective power of the reflective surface is stronger than that of conventional ones, and it does not deteriorate over time, making it more flexible.
It has the excellent effect of being strong against a single quantity and making it possible to manufacture a reflective surface at low cost.

[Brief explanation of the drawing]

FIG. 1 shows a method for manufacturing a reflective surface according to the present invention. ! ! Figure 2 is a perspective view showing the external appearance of the I5 sensor.
It is an enlarged sectional view of the opposite 11 plane along the Δ line. l...Sign surface 2...Urethane coating i↓3...Glass beads

Claims (1)

[Claims] (1) A method for manufacturing a reflective surface of a sign, characterized by comprising the following steps. (b) Applying urethane paint to the sign surface that will become a reflective surface; (b) Spraying glass beads onto the urethane paint application area before the urethane paint dries; (c) Drying the sign surface for 70 minutes in a dryer. a step of heating and drying for 20 to 40 minutes at a temperature within the range of 120°C to 120°C; (d) a step of cooling the label surface.