JPH0592539A - Projected pattern display method on metal sheet - Google Patents

Abstract

PURPOSE:To provide a method of forming a raised pattern on a metal sheet without generating distortion, which enables multikind low-production easily. CONSTITUTION:Small holes 1... and small recessed holes 4... are opened on a metal sheet 2 and a support sheet 5 by etching. The small holes 1... are formed in conformity to the small recessed holes 4..., and the surface F of the metal sheet 2 is supported by the supporting sheet 5. While or after a thermoplastic material 6 is overlapped on the rear face B side of the metal sheet 2 and heated thereon, the thermoplastic material 6 is pressed to the metal sheet 2 by a press 7. The thermoplastic material 6 is filled into the small holes 1... and also permeated into the small recessed holes 4.... When the supporting sheet 5 is removed from the metal sheet 2, a small projected section is formed on the surface F side of metal sheet 2. A projected pattern is realized by the small projected section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for displaying a convex pattern on a metal plate.

[0002]

2. Description of the Related Art Conventionally, in order to display a convex pattern such as Braille, characters, figures and symbols on a metal plate, the metal plate is generally deformed by a press to form a protruding ridge on the front side. It was

[0003]

However, in the conventional method of displaying a convex pattern on a metal plate as described above, the metal plate may be distorted, and an expensive mold is required, which often causes a problem. When producing a small amount of varieties, the cost was high.

Therefore, the present invention solves the above problems,
An object of the present invention is to provide a method for displaying a convex pattern on a metal plate, which does not cause distortion on the metal plate and which is low in cost even in the case of producing a large number of various products.

[0005]

In order to achieve the above-mentioned object, a method for displaying a convex pattern on a metal plate according to the present invention is a method of forming a plurality of small holes through a metal plate by etching, In a receiving plate having a small concave hole arranged symmetrically with respect to the small hole on the front side of the metal plate, the small hole of the metal plate and the small concave hole of the receiving plate are Receiving the front surface of the metal plate so as to be coincident with each other, further heating a thermoplastic material such as plastic, and / or while heating, pressing the back surface side of the metal plate with a press, The thermoplastic material is filled in the small holes of the metal plate, and is extruded in a convex shape to the front surface side of the small holes to penetrate into the small recess holes of the receiving plate, and then the front surface of the metal plate. The receiving plate is removed from the surface side to form a plurality of small protrusions on the front side of the metal plate, and a convex pattern is displayed on the small protrusions. Those were.

[0006]

The metal plate and the receiving plate can be easily manufactured by etching without using an expensive mold. Further, masking by printing with a silk screen or the like for etching the metal plate and etching of the receiving plate can be used by reversing the same pattern, and thus masking printing is easy.

[0007]

The present invention will be described in detail below with reference to the drawings showing the embodiments.

FIG. 1 shows an example of a metal plate with a convex pattern obtained by the method for displaying a convex pattern according to the present invention. This metal plate has a plurality of small holes 1 ... A plurality of small projecting ridges 3 ... Are formed on the front surface F side of the metal plate 2, and a convex pattern is displayed on the small projecting ridges 3.

In the present invention, the convex pattern is defined as Braille, (general) characters, symbols, various figures, various patterns and the like.

The present invention will be described in detail below in the order of manufacturing steps.

First, as shown in FIGS. 2 and 3 and FIGS. 4 and 5, small holes 1 ... Are formed through the metal plate 2 by etching, and small recesses 4 are formed in the metal receiving plate 5. ... through.

That is, as shown in FIGS. 2 and 3, the front and back surfaces of the metal plate 2 are covered with the etching resist layers 10 by a printing method such as silk screen printing or photo printing. That is, masking is performed. At this time, holes 9 are arranged in the etching resist layers 10 by the printing method, and a pattern (Braille in the figure) is drawn in the holes 9. That is, as shown in FIG. 2, the hole 9 is formed on the front surface F side of the metal plate 2.
3, a pattern is drawn, and as shown in FIG. 3, on the back surface B side of the metal plate 2, the hole 9 is formed at a position corresponding to the hole 9 on the surface F side (position as an inverted pattern). ... is provided.

Therefore, the etching resist layer 10,
The metal plate 2 coated with 10 is placed in a corrosive liquid (not shown). Then, the metal plates 2 are melted at the positions of the holes 9 ... From both front and back surfaces, communicate with each other at the center of the front and back, and the small holes 1 are provided as shown by the phantom line in FIG.

Further, as shown in FIGS. 4 and 5, the receiving plate 5
The front and back surfaces of the etching resist layer 1 by the above printing method
Cover with 0, 10. That is, as shown in FIG. 4, the etching resist layer 10 on the receiving surface C on the front surface side is plane-symmetrical (inverted pattern) with the holes 9 of the etching resist layer 10 on the front surface F side of the metal plate 2. That is, the holes 9 ... Are arranged in the same arrangement as the holes 9 ... Of the etching resist layer 10 on the back surface B side of the metal plate 2. Further, as shown in FIG. 5, the entire back surface of the receiving plate 5 is covered with an etching resist layer 10.

Therefore, the etching resist layer 10 on the receiving surface C side of the receiving plate 5 can be printed on the same plate as the plate used on the back surface B side of the metal plate 2.

Therefore, the etching resist layer 10,
The backing plate 5 covered with 10 is placed in a corrosive liquid (not shown) for a little longer time. Then (shown by the phantom line in FIG. 3)
Small recessed holes 4 (shown by an imaginary line in FIG. 5) having a diameter slightly larger than the small holes 1 are formed on the receiving surface C side of the receiving plate 5.

The small hole 1 thus obtained
, And the small recessed hole 4 are formed through the metal plate 2 and the receiving plate 5 to form a convex pattern as described below.

That is, as shown in FIG. 6, the front surface F side of the small holes 1 ... of the metal plate 2 and the small recessed holes 4 of the receiving plate 5 are overlapped with each other so that the front surface of the metal plate 2 appears. The surface F is received by the receiving surface C of the receiving plate 5. Further, on the back surface B side of the metal plate 2, a thermoplastic material 6 made of a synthetic rubber containing a plasticizer or a plastic such as polypropylene or vinyl chloride is placed.

The thermoplastic material 6 is heated in advance. Then, the thermoplastic material 6 is pressed by the press 7 into the metal plate 2
Press to. Alternatively, it may be pressed by the press 7 while being heated. Alternatively, both heating may be used together.

Then, as shown in FIG. 7, the thermoplastic material 6 is filled in the small holes 1 ... Of the metal plate 2 and the small holes 1
... is extruded in a convex shape to the surface F side and penetrates into the small recessed holes 4 of the receiving plate 5.

After that, when the thermoplastic material 6 is sufficiently cooled, the receiving plate 5 is removed from the front surface F of the metal plate 2,
As shown in FIG. 1, small projecting ridges 3 are formed, and the small projecting ridges 3 penetrate the small holes 1 of the metal plate 2 and are formed on the back surface B side of the metal plate 2. And become a continuous one.

In this embodiment, the small concave holes 4 of the receiving plate 5 and the small holes 1 of the metal plate 2 are substantially circular in plan view,
The diameter of the small recessed holes 4 is slightly larger than the diameter of the small holes 1. In this way, the small projecting ridges 3 ... Have a “mushroom” shape, and the diameter of the base end portion thereof is small.
Since the diameter is slightly larger than the diameter, the small projecting ridges 3 have the advantage that they do not come out in either direction.

Further, the small concave holes 4 of the receiving plate 5 and the metal plate 2
The small holes 1 ... May have various shapes other than a substantially circular shape in a plan view, and preferably have a rectangular shape in a plan view, a triangular shape, and other polygonal shapes, for example. Further, the color of the thermoplastic material 6 forming the small protrusions 3 ... Can be set freely.

In the above embodiment, the convex pattern is in Braille, but characters, figures, and symbols other than Braille may be displayed, or various patterns may be displayed and used for decoration. .. Further, it is also preferable that the metal plate 2 having a large number of small protrusions 3 is fixed to a handrail or a floor and used as a slip stopper. Further, a thermosetting resin may be used, in which case the press 7 is sufficiently heated after being pressed.

[0025]

Since the present invention is constructed as described above,
The following effects are achieved.

Since the small holes 1 ... Of the metal plate 2 are formed by etching, it is possible to easily carry out small-lot production of a wide variety of products, and a die for pressing or the like is not required, so that the manufacturing cost can be reduced.

Further, since the metal plate 2 is received by the receiving plate 5 and the thermoplastic material 6 is pressed by the press 7, the metal plate 2 is not distorted. Therefore, the metal plate 2 can be finished flat.

Further, the small projecting ridge 3 is provided on the back surface B of the metal plate 2.
Since it is formed by being extruded in a convex shape from the side through the small hole 1 to the surface F side, it is continuously integrated on the back surface B side through the small hole 1 and is hard to fall off from the metal plate 2.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an example of an article manufactured by the method of the present invention.

FIG. 2 is a plan view of a metal plate covered with an etching resist layer.

FIG. 3 is a sectional view taken along line XX of FIG.

FIG. 4 is a plan view of a receiving plate covered with an etching resist layer.

5 is a cross-sectional view taken along the line YY of FIG.

FIG. 6 is a cross-sectional view of an essential part explaining a manufacturing process.

FIG. 7 is a cross-sectional view of an essential part explaining a manufacturing process.

[Explanation of symbols]

 1 Small Hole 2 Metal Plate 3 Small Ridge 4 Small Groove 5 Receiving Plate 6 Thermoplastic Material 7 Press B Back Side F Front Side

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Fuminori Okuda 4-40-6 Niwadaidai, Sakai City (72) Inventor Hiroshi Maruyama 295-13 Hirose, Habikino City

Claims (1)

[Claims] 1. After a plurality of small holes 1 ... Are formed through a metal plate 2 by etching, they are arranged symmetrically with respect to the small holes 1 ... on the front side F of the metal plate 2. , And the receiving plate 5 having the small holes 1 ...
Of the metal plate 2 so as to be aligned with the small recesses 4 of the metal plate 2, and further, after heating the thermoplastic material 6 such as plastic, and / or while heating, press 7 Is pressed to the back surface B side of the metal plate 2 to fill the thermoplastic material 6 into the small holes 1 ... of the metal plate 2, and the surface of the small hole 1 ... It is pushed out and penetrates into the small concave holes 4 ... of the receiving plate 5, and then the receiving plate 5 is removed from the front surface F side of the metal plate 2 to form a plurality of metal plates 2 on the front surface F side. A method for displaying a convex pattern on a metal plate, characterized in that individual small protrusions 3 are formed and a convex pattern is displayed on the small protrusions 3.