JPH03246132A - Pattern displaying method for ornament - Google Patents

Abstract

PURPOSE:To enable a pattern to be displayed so that it can be seen as two kinds of different metallic brightness in the daytime, while at night light penetrates and the pattern can be seen as if it were floated up, by irradiating a laser beam onto a transparent resin base material in which metallic powdery particles are dispersed, and by changing in quality the metallic powdery particles in the portion irradiated by the laser beam for displaying a pattern. CONSTITUTION:When a laser beam L irradiates a transparent resin base material 2 in which metallic powdery particles 5 are dispersed, the laser beam penetrates through the base material 2 to irradiate the powdery particles 5. As a result, the portion in the powdery particles 5 irradiated by the laser beam L is heated and changed in quality. The state of the surface of the portion changed in quality differs from that of the other portion. Accordingly, when light is incident on an ornament thus formed to hit the powdery particles 5, the angle of reflection of the light differs in the portions. Consequently, the portion changed in quality has brightness different from the other portion, and it can be seen as a pattern 6 when viewed from the outside of the base material 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for expressing patterns such as letters and pictures on decorative items such as car garnishes.

[Prior Art and Problems to be Solved by the Invention] Conventionally, for example, rear garnishes attached to the rear of automobiles have been made of metal-like materials such as car name logos, grade names, designs, etc. on the inner surface of a transparent resin base material. Some have patterns.

This pattern is produced by so-called hot stamping, in which hot stamping foil is heat-pressed onto the inner surface of the substrate using a press or roller, or by vacuum evaporation, in which the metal is gasified or ionized in a vacuum container and then deposited on the inner surface of the substrate. It is formed. Although the metallic pattern is excellent in terms of daytime visibility and gorgeous design effect, it is difficult to stand out at night and has the problem that the visibility and design effect are halved. Therefore, it is desired to develop a rear glazing that is not only highly visible during the day, but also allows the light from the lamps at the rear of the vehicle to pass through and make the pattern stand out as a glitter.

Furthermore, in the conventional ryaganish, due to its structure,
Since the pattern cannot be made to appear after being assembled to a vehicle body, etc., it is unsuitable for high-mix, low-volume production in which many types of letters, designs, etc. are set, and there is also the problem that it is undesirable in terms of production management.

The present invention was made in view of the above-mentioned circumstances, and its purpose is to easily create a pattern that can be seen as two different kinds of metal dimming brightness during the day, and that appears to be floating when light passes through it at night. Not only can it be used to accurately form a predetermined shape in a process, but it can also be used to form a desired pattern when assembled onto an adherend such as a car body, and it is also easy to form multiple types of patterns with different shapes. An object of the present invention is to provide a method for displaying patterns on ornaments that can correspond to the above.

Means for Solving Problem U] Therefore, in order to achieve the above-mentioned object, in the method for creating a pattern in a decorative article of the present invention, a laser beam is applied to a transparent resin base material in which metal powder is dispersed. The laser beam changes the quality of the metal powder in the irradiated area, creating a pattern.

[Operation] When a laser beam is irradiated onto a transparent resin base material in which metal powder is dispersed, the laser light passes through the base material and is irradiated onto the powder. As a result, the part of the powder that is irradiated with the laser beam is heated and its quality changes.

The surface condition is different between this altered part and other parts. Therefore, when light enters the decorative article formed in this way and hits the powder, the angle of reflection of the light differs depending on the part. Therefore, the altered portion appears as a pattern from the outer surface of the base material as a brightness different from other portions.

[Embodiment] An embodiment in which the present invention is embodied in a rear garnish attached to the rear end of an automobile will be described below with reference to the drawings.

As shown in FIG. 1(b) and FIG. 2, the base material 2 of the rear garnish 1 of this embodiment is a horizontally long plate made of a synthetic resin material so as to be installed between the left and right rear combination lamps 4 at the rear of the automobile 3. It is formed in the shape of The synthetic resin material constituting the base material 2 is a transparent synthetic resin such as PMMA (polymethyl methacrylate) and PC (polycarbonate). Here, transparent includes not only colorless and transparent, but also colored transparent and translucent. Powder 5 made of metal such as aluminum or zinc and having a diameter of 0.1 to 0.5 μm is almost uniformly dispersed in the base material 2 at all locations. A portion of this powder 5 is altered in quality by irradiation with laser light, which will be described later, and the altered parts are visible as various patterns 6 from the outer surface side of the base material 2. Examples of the various patterns 6 include logos such as car names, grade names, and patterns.

Next, a method of producing the pattern 6 in the garnish 1 constructed as described above will be explained.

In this example, in order to create the pattern 6, a laser beam processing method that takes advantage of the characteristics of laser light is used.

This method uses an optical system such as a lens to irradiate a highly parallel, high-power laser beam onto the surface of the workpiece in a converged state. In addition, this laser beam processing method can be narrowed down to a minute spot, making it easy to create complex patterns 6; and ■ Processing can be done in a non-contact state, and can process remote parts by using optical means. It is easy to automate since it can be processed at difficult angles, and it is possible to process powdered materials 5 because the force applied to the workpiece during processing is small. There are three types of lasers: gas lasers, liquid lasers, and solid-state lasers. In this example, a solid-state laser (Nd-YA
G laser) was used.

Next, a method of creating the pattern 6 using the laser beam as described above will be explained with reference to FIGS. 1(a) and 1(b).

First, prior to this laser beam irradiation, a transparent resin base material 2 in which aluminum powder 5 is almost uniformly dispersed is prepared as shown in FIG. Attach to. Next, an Nd-YAG laser processing machine is set near the base material 2, and a pattern 6 is formed on the powder material 5.
Focus the laser light on the area where you want to appear, and
Laser light is irradiated with an output of 30 W/M.

When the laser light is irradiated towards the base material 2 in this way,
Since the base material 2 is made of a transparent synthetic resin, the laser light passes through the base material 2 and is irradiated onto the powder 5. When the powder 5 is irradiated with laser light, the temperature of the irradiated part of the powder 5 increases in a very short time, and as a result,
As shown by the two-dot chain line in FIG. 1(b), the part of the powder 5 irradiated with the laser light changes in quality. At this time, the surface of the altered part will be different from the surface of the other powder 5,
These will become the desired pattern 6.

In Jaganish I, in which the pattern 6 appears as described above, the base material 2 is made of a transparent synthetic resin, so that part of the light incident from the outer surface of Jaganish 1 during the daytime is To Penetrate.

In addition, since light other than the above is reflected by hitting the powder 5 dispersed within the base material 2, a shimmering shine similar to the fractured surface of ore is obtained. At this time, since the surface conditions of the pattern 6 portion and other portions of the powder 5 are different, the light reflectance differs depending on the portion.

Therefore, from the rear of the car 3, the pattern 6 portion and the other portions appear to be shining in different colors.

Since the reflections from the powder 5 have a synergistic effect of mutually emphasizing and lifting each other, the rear garnish 1 as a whole can have two types of accented metallic brilliance and a beautiful appearance rich in luxury.

Furthermore, at night when the lights on the rear of the car 3 are lit,
Since the base material 2 is made of transparent resin, part of the light from the lamp passes through the base material 2. Since the other light is irradiated onto the powder 5 and reflected, a flickering and glittering feeling can be obtained. At this time, the pattern 6 and the rest of the pattern 6 have a different color of brilliance in the same manner as described above, so that the metallic pattern 6 in particular appears to stand out from the rear of the car 3.

Moreover, since the above-described pattern 6 is visible through the base material 2, it can be visually recognized as a beautiful appearance with a rich sense of depth. Further, since the powder 5 including the pattern 6 is dispersed in the base material 2, good weather resistance and durability can be maintained.

As described above, according to the method for forming the pattern 6 of this embodiment, the pattern 6 can be accurately formed into a predetermined shape by a simple process of irradiating laser light. Further, the pattern 6 can be formed while the base material 2 is attached to the rear of the car 3,
Furthermore, by simply changing the area irradiated with laser light,
It is possible to form multiple types of logos, grade names, patterns, etc. Therefore, it can easily cope with high-mix, low-volume production, which is preferable from the point of view of production control. Furthermore, original characters, patterns, etc. can be created extremely easily according to demand.

Note that the present invention is not limited to the configuration of the above embodiments (for example, the present invention may be applied to bites, bicycle decorations, nameplates, etc.).
It can be embodied in a guide plate, etc., various lasers other than the Nd-YAG laser can be used as the laser, and metals such as granules, plates, fibers, crystals, etc. can be used as the powder 5, etc. However, the present invention can be modified and embodied as desired without departing from the spirit of the invention.

[Effects of the Invention] As detailed above, according to the display method of the present invention, a pattern that appears as two different types of metallic dimming brightness during the day, and that appears to be floating when light passes through it at night, can be created. It can be made to appear in a simple process. Moreover, not only can a desired pattern be accurately displayed while the base material is attached to an adherend, but also it is possible to easily correspond to the appearance of a plurality of types of patterns having different shapes.

[Brief explanation of drawings]

FIGS. 1(a) and 1(b) are cross-sectional views showing a method of creating a pattern in an embodiment embodying the present invention, and FIG. 2 is a partial perspective view showing a state in which a rear garnish is attached to the rear of an automobile. be. 2... Base material, 5... Powder, 6... Pattern, L...
・Laser light.

Claims (1)

[Claims] 1. Laser light (L) is irradiated onto a transparent resin base material (2) in which metal powder (5) is dispersed, and the laser light (L)
A method for creating a pattern in an ornament, which comprises changing the quality of the metal powder (5) at the irradiated area to create the pattern (6).