JPS604036A - Formation of display by laser - Google Patents

Abstract

PURPOSE:To form display of letters, marks, etc., simply and exactly in a short time on an object molded of a thermoplastic resin by a method in which laser ray is projected onto a displaying object molded of a thermoplastic resin for melting to form a display. CONSTITUTION:When laser ray is projected onto a displaying object 1 of a thermoplastic resin, a display 2 is clearly formed because the color of the melted portion is distinctly different from the other color of the displaying object 1. This can eliminate the needs to color the melted portion with a paint, etc., as in the case where laser ray is projected onto a metal plate. The formation of a display on a displaying object can thus be simply made in a short time at low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for forming a display onto a display using a laser beam.

2. Description of the Related Art It has already been practiced to irradiate a metal plate constituting a display object such as a name plate with a laser beam and melt it to form a display body such as letters or symbols. However, in this case, the difference between the color of the melted part by the laser beam and the color of the background of the metal plate was small, so it was necessary to color the melted part with paint or the like to make the display clear.

In addition, when molding a display body into a push button of a calculator made of synthetic resin, first mold a core with the display body, and then attach the core and color to the outside of the core except for the display body part. A push button with a display body was formed by fusing different plastics.

However, this product requires two molds, one for the display body and one for the external body, which requires molding twice, resulting in high initial cost, complicated manufacturing process, and increased cost as it takes time. There were drawbacks.

Purpose The purpose of the present invention is to eliminate the above-mentioned drawbacks and to provide a method for easily and clearly contacting display objects molded with thermoplastic resin, such as name plates and calculation buttons (such as push buttons) in a short time. It is an object of the present invention to provide a method for forming display bodies such as characters and symbols without any problems.

Structure In order to achieve the above object, the present invention has a structure characterized in that a display object made of a thermoplastic resin is irradiated with a laser beam and melted to form a display object.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 in FIGS. 1 and 2 is a display object such as a push button of a calculator, which is made of polyethylene resin, polypropylene resin, polystyrene resin, As resin, ABS resin, polyacetal resin, etc.
It is molded from thermoplastic resin such as polyamide resin, polyacrylonitrile resin, polybutylene terephthalate resin, and polycarbonate resin. When the display object 1 made of the thermoplastic resin is irradiated with a laser beam, the irradiated area melts and changes to a color that is very different from the background color of the display object 1 made of the thermoplastic resin. This melted and discolored portion is referred to as a display body 2.

FIG. 3 shows another embodiment of the present invention, in which display object 1
The part of the display body 2 that was irradiated with the laser beam is raised.

Effects As described above, in the present invention, when a display object made of a thermoplastic resin is irradiated with a laser beam, the melted portion exhibits a change in color that is very different from the background color of the display object, so that the display object is clearly molded. be done. Therefore, unlike when a metal plate is irradiated with a laser beam, there is no need to color the melted part with paint, etc., and the display body can be formed into a display object in an extremely short time and easily, reducing costs. It is possible to reduce the

In addition, just by shining a laser beam made of thermoplastic resin on Q = J, the melted part is directly molded into a display object, so characters, symbols, etc. can be formed on display objects such as push buttons made of conventional synthetic resin. It is no longer necessary to perform molding twice using synthetic resins of different colors, and the manufacturing process can be simplified because only one mold is needed for the outer shape.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the present invention, and FIG. 2 is a plan view of the embodiment of the present invention.
Figure 3 is a cross-sectional view of another embodiment of the present invention. 1... Display object made of thermoplastic resin, 2... Portion melted by laser beam irradiation (i.e. display object).

Claims (1)

[Claims] A method for molding a display body using a laser beam, characterized by irradiating a display body formed of a thermoplastic resin with a laser beam and melting the display body to form the display body.