JPS5912900A - Method of forming relief - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for integrally forming reliefs such as letters, symbols, or figures on the surface of an object to be treated using ultraviolet rays or electron beam curable resin. ,
The purpose is to diversify the symbol 1 figure.

Embodiments of the present invention will be described below with reference to the drawings.

1 and 4, first, a coating film 2 is formed by applying an ultraviolet ray or electron beam curable resin to the surface of an object to be treated 1, and then the coating film 2 is left in an uncured state. A shadow mask 3 is superimposed on the surface of the film 2. As shown in FIG. 3, the shadow mask 3 is made of a transparent thin plate that transmits ultraviolet rays or electron beams, and the inner surface of the shadow mask 3 is colored in areas 5 other than the pattern 4 to represent a pattern 4 of transparent embossed characters, symbols, or figures. It is opaque. This shadow mask 3 is superimposed on the surface of the uncured coating film 20, and then ultraviolet rays or electron beams are irradiated. Then, coating 1III2
Only the portion 4a of the shadow mask 3 that corresponds to the pattern 4 through which ultraviolet rays or electron beams are transmitted is cured, and the other portion 5a that corresponds to the colored opaque portion 5 remains uncured. Thereafter, by peeling off the shadow mask 3 and washing off the uncured portion 5a of the coating film 2 with a solvent, a relief 6 of desired characters, symbols, figures, etc. is created on the surface of the object 1 as shown in FIG. Formed in one piece.

A specific example of the object to be processed 1 is an electric shaver product as shown in FIG. 6, and the surface of the case of this product is made of ABS resin. On this surface, an embossment 6 of the English letters rABcJ and rPUSHJ made of an ultraviolet curable resin such as a photopolymerizable resin mainly composed of an acrylic oligomer having an acryloyl group in the molecule is integrally formed on this surface by the method described above.

A method of forming a pattern 4 of a desired embossed character, symbol, or figure on a shadow mask 3 is as follows.

As an alternative to the above method, there is a method of cutting out and forming a pattern 4 on a shadow mask 3 made of an opaque plate as shown in FIG. does not occur, but the ninth
Not shown in the figure, the letters rAJ and rBJ are cut out 9
In the figure, the font 7 is omitted, which is of no use. This point.

According to the method of the present invention, in addition to rAJ and rBJ, various characters, symbols, figures, etc. can be represented.

The shadow mask 3 has a surface 3a on the side where the fourth pattern is formed.
It is preferable to mask the coating film 2 in a polymerized state in which it is in contact with the coating film 2, in order to clearly show the contour lines of embossed characters, symbols, or figures.

That is, as shown in FIG. 7, when masking is performed by overlapping the shadow mask 3 so that the surface 3a on which the shadow mask 3 is formed and the surface 3b on the opposite side are in contact with the surface of the coating film 2,
The lower layer A of the opaque area 5 is colored by ultraviolet rays or electron beams incident on the shadow mask 3 from the transparent pattern 4 part.
This refracted light ray causes the outer part of the coating film 2 other than the part 4a that matches the pattern to also be cured 9
This is because the relief 6 with unclear contour lines is likely to be formed.

However, if the surface 3a on the pattern formation side of the shadow mask 3 is in a polymerized state in contact with the coating film 2 as described above, this problem will not occur and the relief 6 will harden along the outline of the pattern 4, resulting in poor density. An excellent shape can be obtained.

As explained above, in the relief forming method of the present invention, the coating film 2 is formed by coating the surface of the object 1 with an ultraviolet ray or electron beam curable resin, and the coating 11! f! 2
The shadow mask 3 is superimposed on the surface of the shadow mask 3, and only the portion 4a corresponding to the pattern 4 of the shadow mask 3 is cured by ultraviolet rays or electron beam irradiation, and the uncured portion 5a is removed with a solvent to form the relief 6. The relief 6, such as letters, symbols, or figures, can be easily integrally formed on the surface of the object 1 to be processed, and the ultraviolet/electron beam curable resin can be cured in an extremely short time, thereby improving productivity. It can also increase the surface hardness of the relief and has excellent wear resistance.

Since no heat is required to harden the relief, the relief 6 can be satisfactorily formed even on the object 1 to be treated for which heating is inappropriate.

(In addition, the shadow mask 3 used in the method of the present invention is composed of a transparent thin plate, and the pattern 4 dedicated to transparent embossed characters, symbols, or figures formed on this plate is formed by coloring the parts 5 other than 4 to make them opaque. Compared to the method in which patterns are cut out and formed on an opaque shadow mask, a wide variety of patterns can be obtained and a wide variety of reliefs can be produced.Furthermore, the method of the present invention According to this method, the device can be miniaturized, it is relatively simple, the area occupied by the equipment is small, and the equipment cost is low.

[Brief explanation of drawings]

1 to 6 show embodiments of this invention,
FIG. 1 is a perspective view showing a state in which a shadow mask is superimposed on a coating film formed on the surface of an object to be processed. Fig. 2 is a perspective view showing a state in which relief is formed on the surface of the object to be processed, Fig. 3 is a partial perspective view of the shadow mask, Fig. 4 is a sectional view showing the state of ultraviolet irradiation, FIG. 5 is a cross-sectional view of the object to be processed showing a state in which the relief is formed, and FIG. 6 is a perspective view of the electric shaver on which the relief has been applied. FIG. 7 is a sectional view showing another example of how the shadow mask is used. FIG. 8 is a reference perspective view showing an undesirable shadow mask, and FIG. 9 is a reference view illustrating embossed characters in that case. l...Object to be processed. 2... Paint film. 3...Shadow mask. 4... ・Pattern. 5...Colored opaque areas. 6. Relief. Figure 6 Figure 7 Figure 8 Figure 9 Procedure? i ■ Formal writing (method) % formula % ■, Indication of the case Patent Application No. 122352 of 1982 2, Method for forming the name relief of the invention 3, Person making the amendment Relationship with the case Patent applicant address Tagawa District, Fukuoka Prefecture 4680 Ikata, Shiromachi Oaza Name: Kyushu Hitachi Maxell Co., Ltd. 4, Agent: ◎530 (06) 312-4
738 Address 3-21 Suehiro-cho, Kita-ku, Osaka 1982
Dispatched on October 26, 2017 6, Subject of amendment 7, Contents of amendment +1+ "Figure 8 is..." on page 7, line 5 of the specification
The statement from "...This is a reference figure." on page 7, line 7 of the same document is amended as follows. ``Figure 8 is a perspective view showing an undesirable mask.

Claims (1)

Scope of Claims (11) A step of coating the surface of the object 1 with an electron beam curable resin to form a coating film 2 in an uncured state; A step of overlaying a shadow mask 3 in which only the thin plate G-shaped turn 40 portion is made transparent by coloring and making the portion 5 other than the turn 4 transparent;
The surface of the shadow mask 3 is irradiated with ultraviolet rays or electron beams to harden only the portion 4a of the coating film 2 that corresponds to the turn 4, and after the coating film 2 is cured, the shadow mask 3 is After that, paint film 2 shadow mask 30
A relief forming method comprising the step of cleaning and removing uncured portions 5a corresponding to colored opaque portions 5 with a solvent. (2) The relief forming method according to claim 1, wherein the shadow masks 3 are overlapped with each other in such a manner that the surface 3a on the side where the shading pattern 4 is formed is in contact with the coating film 2.