JPH0197478A - Pinball - Google Patents

Abstract

PURPOSE: To form a blue Pachinbko ball (used in Japanese pinball game) and to perform discriminate from other shops by the Pachinko ball by using vanadium, far instance, as metal for color development. CONSTITUTION: Zirconia is used as a base material so as to obtain this Pachinko ball capable of obtaining an almost similar use feeling even as the substitute for the Pachinko ball made of iron and being easily colored without discoloration. The specify gravity of the zirconia is 6.5-6.8 and is close to the specific gravity 7.86 of the iron and it is optimal as the substitute for the iron. Then, in order to color the Pachinko ball to a desired color, the small amount of the metal for the color development is added before sintering. The density of the color is freely changed by the adding amount of the metal for the color development and the discrimination from other balls is easily performed by changing the density of the color even when it is the same color. Thus, the Pachinko ball of high durability almost without wear by use is attained. Also, the discrimination from the balls of the other shops is extremely easily performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to pachinko balls, and more particularly to pachinko balls having a specific color.

[Conventional technology] Conventional pachinko balls are made of iron, and in order to indicate that each stadium owns the ball, a unique stamp is applied to the ball, and the stamp is embedded in a predetermined color. Ta.

[Problems to be Solved by the Invention] However, the coloring of the engraved portion peels off with use, reducing its distinguishability.

For this reason, there was a problem in that it was unknown even if balls from other stores were mixed in.

Further, there was a problem in that when the engraved portion hits a nail of a pachinko machine, the direction of repulsion changes and the repulsion does not occur in the desired direction.

Furthermore, in order to respond to the diversification and individualization of tastes, there is an increasing need to differentiate among the five pachinko parlors, but if iron pachinko balls are used, the color of the ball will be uniquely determined. It was nearly impossible for Pachinko parlors to differentiate themselves from other parlors.

[Means for Solving the Problems] The present invention has been made for the purpose of solving the above-mentioned problems, and as a means for solving the above-mentioned problems, an embodiment according to the present invention is as follows. Equipped with a configuration.

That is, a predetermined amount of coloring metal is added to zirconia and sintered to form a pachinko ball.

[Function] In the above configuration, for example, a blue pachinko ball is formed by using vanadium as a coloring metal, and a green pachinko ball is formed by using fromium as a coloring metal.
By using praseodium, yellow pachinko balls can be made.

And since this color is uniformly colored throughout the pachinko ball,
It does not change at all with use, and zirconia and iron have approximately the same density, so they can be used between iron pachinko balls and pachinko balls.

[Example] Hereinafter, one embodiment of the present invention will be described in detail.

In this example, in order to obtain a pachinko ball that can be used as a substitute for conventionally used iron pachinko balls, and which has almost the same usability, is easy to color, and does not fade,
Zirconia (ZnO2) is used as the basic material.

The specific gravity of zirconia is 6.5 to 6.8, and the specific gravity of iron is 7.
．． 86, making it an ideal substitute for iron. In order to color the pachinko balls in a desired color, a small amount of coloring metal is added before sintering.

The depth of the color can be freely changed by changing the amount of the coloring metal added, and even if the color is the same, it can be easily distinguished from the Earth by changing the depth of the color.

The amount of this metal added is 0.01% to 0.0% of the amount of zirconia.
About 2% is sufficient, and at most about 0.1% will produce sufficient color.

Specifically, a predetermined amount of coloring metal is added to zirconia, stirred, etc. to make it homogeneous, and then this is formed and sintered into a spherical shape having the same shape as a conventional pachinko ball using a known method. As a result, the entire sphere is uniformly colored in a color unique to the metal.

The zirconia pachinko balls formed in this way have a hardness second only to diamonds, and they hardly ever wear out.Also, since the entire ball is colored, the color does not peel off with use. It can be made highly reliable without falling.

In addition, during sintering of zirconia, Y2O, CaO, etc. are added to synthesize stable cubic ZrO2 at high temperature, and then heat treatment is performed in a temperature range where tetragonal crystals are stable to produce partially stabilized zirconia (p
sz), it is possible to obtain ceramics that are hard to break and have high toughness.

By forming pachinko balls from this partially stabilized zirconia (PSZ), it is possible to make pachinko balls with high durability and no breakage.

Examples of the coloring additive metals used in this example and their colors are shown in the table below.

Note that the above additive metals and colors are presented as examples, and the present invention is not limited to the above examples.

There are no restrictions on the metal added to zirconia, and any metal may be selected depending on the type of color to be produced.

[Effects of the Invention] As explained above, according to the present invention, it is possible to provide a pachinko ball that provides a feel substantially similar to that of iron, can be used in the same manner as iron, and is uniformly colored over the entire ball.

Moreover, this color varies depending on the metal added, and the intensity of the color can be changed depending on the amount added, so the color does not change with use. Therefore, it is possible to obtain a pachinko ball with high usability and little wear due to use.

Moreover, it can sufficiently respond to recent trends in individualization and fashion, and has the excellent effect of being extremely easy to distinguish from balls from other stores.

Claims (5)

[Claims] (1) A pachinko ball characterized by being formed by adding a predetermined amount of coloring metal to zirconia and sintering the mixture. (2) The pachinko ball according to claim 1, wherein the coloring metal is vanadium. (3) The pachinko ball according to claim 1, wherein the coloring metal is chromium. (4) The pachinko ball according to claim 1, wherein the coloring metal is praseodium. (5) The amount of coloring metal added is 0.01% to 0.1% of the total
%. The pachinko ball according to any one of claims 1 to 4.