JPH06269308A - Medal and manufacture thereof - Google Patents

Abstract

PURPOSE:To provide a medal which enables accurate selection by enabling the clear identification from other medals. CONSTITUTION:A medal 1 is formed by fitting a metal material 2 into a metal material 3, the both made of different metal. The color and feel of the surface are differentiated between both the materials 2 and 3. The metal material 2 is made of a ferromagnetic material and the metal material 3 of non-magnetic material. Thus, magnetic characteristics of both the materials are detected to select the medal by specifying it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medal used for souvenirs, games, etc., and a method for manufacturing the medal.

[0002]

2. Description of the Related Art Commemorative medals and play medals are desired to be distinctly distinguished from other medals because of their unique shape and feel.
Since a single type of metal is poured into a molding die, medals made of the same metal have the same surface color, feel, weight, etc., making it difficult to distinguish them from each other. was there.

Further, although the conventional medal selection is performed by a method of detecting the outer diameter dimension, the thickness dimension, the weight, etc. of the medal, it is highly accurate to accurately select the medal by the shape, the weight, etc. Since a shape detector and a weight detector are required, the sorting device becomes complicated and expensive, and when medals having similar shapes and weights are mixed, there is a problem that a sorting error is likely to occur.

Therefore, the present invention is intended to solve the above-mentioned problems and to provide a medal which can be clearly distinguished from other medals and which can perform a sorting operation accurately.

A second object of the present invention is to provide a method capable of efficiently manufacturing the above medal.

[0006]

In order to solve the above problems, the medal of the present invention is formed by joining a plurality of dissimilar metals.

Further, according to the present invention, in the above medal, a structure in which different magnetic characteristics are given to different kinds of metals is adopted.

On the other hand, according to the manufacturing method of the present invention, materials of different metals having different hardness are formed in a shape that fits inside and outside,
A recess or a protrusion is provided on one of the fitting surfaces of the respective materials, each material is pressed in the fitting direction, and both fitting surfaces are abutted and joined.

[0009]

When a medal is formed of a plurality of dissimilar metals as described above, the dissimilar metals have different surface colors and different surface properties such as feeling of touch. Can be distinguished.

When different magnetic properties are given to different kinds of metals, the medals can be specified by detecting the magnetic properties, and the medals formed of the same kind of metal can be reliably selected.

On the other hand, in the manufacturing method, when each fitted metal material is pressed, each material is deformed and both fitting surfaces abut against each other, and the recess or projection provided on one fitting surface is fitted to the other fitting surface. The face bites. The raw materials are firmly joined by the biting of the raw materials in the concave portion or the protruding portion and the surface pressure between the mating fitting surfaces.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, the medal 1 of the embodiment is
It is formed by joining a disk-shaped metal material 2 having low hardness and a ring-shaped metal material 3 having high hardness.

The metallic material 2 has a white or blue metal surface and is made of a ferromagnetic material. on the other hand,
The metal material 3 is formed of a metal whose surface is yellow or red,
It is made of a non-magnetic material that does not react with the magnetic field.

As shown in FIGS. 1 and 2, the two metal materials 2 and 3 are integrally joined by fitting a disk-shaped material 2 inside a ring-shaped material 3. Material 2, 3
The fitting surfaces 4 and 5 are formed with a projection 6 and a recess 7 that bite into each other.

Further, on the front surface and the back surface of each metal material 2, 3,
Letters and pictures are engraved on each.

In the medal of the embodiment having the above-mentioned structure, the color and gloss of the surface are different between the inner metal material 2 and the outer metal material 3 which are dissimilar metals, and the feelings such as touch are also different. Therefore, it is possible to easily distinguish the conventional medals formed of a single kind of metal by the visual sense or the touch feeling.

Further, since the magnetized inner metallic material 2 reacts to the magnetic field and the outer metallic material 3 of the non-magnetic material does not react to the magnetic field, the shape of the medal is specified by placing the medal 1 in the magnetic field. Therefore, it is possible to surely select the medals formed of only the magnetic material or the non-magnetic material. The method for detecting such magnetic characteristics can be performed efficiently and continuously because the medal may be passed through the magnetic field, and the detection device can be manufactured with a simple structure and formed at low cost. be able to.

On the other hand, FIGS. 3A to 3D show a manufacturing example for forming the above medal 1. In this method, first, as shown in FIG. 3A, a disc-shaped metal material 2 is fitted inside a ring-shaped metal material 3,
The mating surface 5 of the metal material 3 having high hardness is previously attached
To form a V-shaped concave portion 7 in the circumferential direction.

In this set state, each metal material 2, 3
Since the metal is taken out from the molding die, both ends of the outer peripheral surface have a shape that bulges in the thickness direction. In addition, a ring-shaped restricting die 11 for determining the outer diameter of the medal is arranged outside the ring-shaped metal material 3 as described later.

Next, as shown in FIG. 3B, when both side surfaces of both metal materials 2 and 3 are pressed in the thickness direction by the pressers 12 and 13, both materials 2 and 3 are deformed and the hardness is low. The metal material 2 on the inner side extends outward.

As this pressurization proceeds, FIG. 3 (c)
As shown in (d), the fitting surface 4 of the metal material 2 abuts on the fitting surface 5 of the metal material 3, and the fitting surfaces 4 and 5 are strongly pressed by the fluidization phenomenon of the metal and The fitting surface 4 is inserted into the concave portion 7 of the mating surface 5 to form the protrusion 6. In addition, the outer peripheral surface of the ring-shaped metal material 3 is deformed outward,
The outer diameter of the medal 1 is formed by hitting the regulating die 11.

In the state of FIG. 3 (d) thus molded, the fitting surfaces 4, 5 of the metal materials 2, 3 are firmly adhered to each other,
Both metal materials 2 and 3 are firmly joined by the surface pressure due to the close contact and the engagement of the recessed portion 7 and the protruding portion 6 that are biting each other.

FIGS. 4A and 4B show another manufacturing example,
In this example, the protrusion 8 is formed on the fitting surface 5 of the outer metal material 3. In this case, when both metal materials 2 and 3 are pressed in the thickness direction, the metal material 2 is deformed inward as shown in FIG. 4 (b) and enters the periphery of the projection 8 to form a biting part. It

5 (a) and 5 (b) show another manufacturing example. In this example, the fitting surface 5 of the metal material 3 is provided with a wedge-shaped projection 9 having a sharp tip. ing.

In each of the above-described embodiments, the concave portion 7 and the projections 8 and 9 are provided on the outer metallic material 3, but the hardness of the inner metallic material 2 is set higher than that of the outer metallic material 3, and Even if the concave portion 7 and the projections 8 and 9 are provided on the fitting surface 4 of the metal material 2 on the inner side, the same joining as described above can be performed.

Further, in the above example, the medal is formed of two kinds of different metals, but the medal may be formed of three or more kinds of different metals.

Further, both metal materials 2 and 3 may be shaped so as to fit inside and outside. For example, the outer diameter shape of the metal material 2 or the fitting surface of the metal material 3 may be a quadrangle or other polygonal shape. You may form.

[0028]

[Effect] As described above, according to the present invention, since the medals are formed of different kinds of metals, it is possible to give the medals different colors, luster, texture, etc., and to distinguish them clearly from the conventional medals formed of a single kind of metal. It can be given the characteristics that it can.

Further, since the medals can be easily specified by giving different magnetic properties to the dissimilar metals, the sorting operation can be performed efficiently and surely.

Further, in the manufacturing method of the present invention, since the metal materials are joined by deformation by pressurization, the joining work can be continuously performed, and the work efficiency can be greatly improved. In addition, unlike the conventional method, metal is not poured into a molding die to form, but is mechanically joined by pressurization, so that dissimilar metals can be joined accurately without being mixed at the boundary, and the manufacturing facility Also has the advantage that it can be simplified.

[Brief description of drawings]

FIG. 1 is a perspective view showing a medal of an embodiment.

FIG. 2 is a sectional view of the same token as above.

3 (a) to (d) are cross-sectional views showing a medal manufacturing process.

4 (a) and 4 (b) are cross-sectional views showing another medal manufacturing method.

5 (a) and 5 (b) are cross-sectional views showing another medal manufacturing method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 medal 2, 3 metal material 4, 5 mating surface 6 projecting part 7 recessed part 8, 9 projecting part 11 regulating mold 12, 13 presser

Claims (3)

[Claims] 1. A medal formed by joining a plurality of dissimilar metals. 2. The medal according to claim 1, wherein the dissimilar metals have different magnetic properties. 3. A material of different metals having different hardness is formed in a shape that fits inside and outside, and a recess or protrusion is provided on one of the fitting surfaces of each material, and each material is fitted in the fitting direction. A method for manufacturing a medal, characterized in that pressure is applied and both fitting surfaces are butted and joined.