JPS63296776A - Solid ball rich in elasticity and its production - 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 (Field of Industrial Application) The present invention relates to a solid ball with high elasticity and a method for manufacturing the same, and relates to a solid ball with high elasticity and a relatively small diameter, which is generally sold as a so-called super ball. This invention relates to a solid ball with high elasticity in which patterns of various colors are added to a real ball, and a method for producing the same.

(Prior Art) This type of solid ball has heretofore been provided as a so-called super ball, which is made of synthetic rubber such as polybutadiene resin and has a relatively small diameter and high elasticity.

However, this ball is limited to a single color due to various constraints in its molding process.Therefore, as a means of adding a colored pattern to the ball surface, an appropriate colored material is attached to the ball surface, or the ball is Measures have been taken to fill and solidify ball materials of different colors into recesses engraved on the surface, but in either case, the color pattern lacks permanence, or the ball surface becomes uneven and the direction of bounce is inconsistent. There were various drawbacks such as the lack of

Therefore, in order to eliminate these shortcomings first, Ganjin Toyama,
He invented a solid ball that can be patterned with a colored pattern without causing unevenness anywhere on its surface, and a method for producing the same, which has been patented (Japanese Patent No. 1185327).

In this patent, a pair of hemispherical bowl-shaped half-split outer shells with perforated windows are put together in a spherical shape within a holding mold, and an inner core material of a color different from that of the outer shell is placed inside the spherical outer shell. By injecting to form a solid ball and forming a color pattern with the color of the outer shell of the ball and the inner core material exposed through the window holes of the outer shell, no unevenness will occur on any part of the surface. The present invention relates to a method of manufacturing a solid ball.

(Problems to be solved by the invention) However, the following problems remained in Toyama's previous patent.

In other words, this manufacturing method is limited to two types of combinations: the color of the outer shell body and the color of the inner core body exposed through the window holes of the outer shell body, so the combinations of colors that form the pattern are extremely limited. There was an inconvenience. For example, even if a pair of outer shell bodies are made to have different colors, the combinations are limited to a maximum of three colors, including the color of the inner core body. As a result, it was not possible to create a pattern using a large number of colors, and there were few variations in color combinations.

Therefore, the present invention was created in order to solve the above-mentioned problems, and has the flexibility to freely use and combine a large number of colors without being restricted by the color of the inner core or the color of the outer shell. The purpose of the present invention is to provide a solid ball with high density and a method for manufacturing the same.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above-mentioned object, the solid ball with high elasticity of the present invention has a suitably thick walled ball with a suitably shaped window hole. A solid ball with high elasticity, which is made by injecting and solidifying an inner core with high elasticity into a hollow outer shell with high elasticity, and which has a plate shape with high elasticity and has a different color from the outer shell. Then, the press-fitting body installed in the window hole area on the inner surface of the outer shell is integrally press-fitted into the window hole by the injection filling pressure of the inner core body, and the outer surface of the window hole and the outer surface of the outer shell are smoothly connected. Make a face.

The manufacturing method consists of a first step of forming an outer shell with an appropriate wall thickness and a window hole made of a highly elastic material; The second step is to install a fluid press-fitting body material from the inner surface window hole of the outer shell to the vicinity of the periphery, and the outer shell with the press-fitting body installed inside is placed in an appropriate holding mold, and then the press-fitting body is placed in a specified press-fitting machine. Using the filling pressure of the fluid inner core material injected into the holding mold, the press-fit material placed on the inner surface of the outer shell is press-fitted into the window hole, and the inner core material is filled into the holding mold. A means for solving the problem is to include a fourth step of integrally solidifying the outer shell body, the press-fitting body, and the inner core body.

(Function) According to the present invention, the press-fit body material placed on the inner surface of the outer shell is press-fitted into the window hole by the filling pressure of the fluid inner core body material injected into the holding mold from a predetermined press-fit machine. , the outer shell body, the press-fit body, and the inner core body are solidified together.

The outer surface of the outer shell with a suitable thickness and a window hole and the press-fit body material press-fitted into the window hole are molded into a fixed shape in a holding mold, and any color pattern on the surface is formed. The result is a smooth continuous surface with no unevenness.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

Reference numeral 1 shown in the figure is an outer shell body having a predetermined wall thickness, and a window hole 2 of an appropriately shaped shape is bored in this outer shell body 1. In the illustrated example, a half-sphere shape is used, but it may be formed smaller than this, for example, the outer shell 1 may be about one-third the size of a predetermined sphere. The shape of the window hole 2 corresponds to the shape of the color pattern applied to the ball, and the hole 2 is opened in an appropriate shape, such as forming a window hole 2 with a number pattern as shown in the figure, and the number thereof is not limited. .

The inner core body 3 is press-fitted into the core part of the ball and solidified.
A press-fit body 4 made of a molded member having a color different from that of the outer shell body 1 is further press-fitted and solidified into the window hole 2 of the outer shell body 1 as the inner core body 3 is press-fitted. The outer shell body 1, the inner core body 3, and the press-fit body 4 are integrated, and the outer surface of the press-fit body 4 exposed from the window hole 2, the outer surface of the outer shell body 1, and the outer surface of the press-fit body 4 are smooth. It is a continuous surface that exhibits a spherical shape.

Outer shell 1. Window hole 2. The press-fitting body 4 is made of a highly elastic material, for example, synthetic rubber such as polybutadiene resin. At this time, the outer shell body 1 and the press-fit body 4 have different colors, but the color of the inner core body 3 does not necessarily have to be different from that of the outer shell body 1 or the press-fit body 4'. For example, the outer shell body 1 and the inner core body 3 may be of the same color, and as shown in the illustrated example, the outer shell body 1. Inner nuclear body 3. In addition to changing the color of each of the press-fit bodies 4, the colors of the outer shell body 1 and the press-fit body 4 are made different, and some of the window holes 2 are
The inner core body 3 may be exposed in a color different from the outer shell body 1.

Next, the manufacturing method includes the following four steps. That is, as shown in FIG. 3, a first step is to form an outer shell 1 having an appropriate wall thickness and a window hole 2 of an appropriate shape in a highly elastic material, and an inner surface of the outer shell 1. A second step of abutting and installing a fluid press-fit body 4 material having an appropriate wall thickness and a color different from the outer shell body 1 from the window hole 2 portion, and installing the press-fit body 4 inside. A third step of placing the outer shell body 1 in a suitable holding mold Q and a predetermined press-fitting machine P
The pressure of the fluid inner core body 3 material that is press-fitted into the holding mold Q from above press-fits the press-fitting body 4 material installed on the inner surface of the outer shell body 1 into the window hole 2, and the inner core body 3 material is pushed into the holding mold Q. The outer shell body 1 and the inner core body 3. This consists of a fourth step of solidifying the press-fit body 4 together.

In addition, the press-fitting of the inner core 3 material from the press-fitting machine P into the holding mold Q in the fourth step is performed several times, and at this time, the material remaining in the window hole 2 in the second step is Air is extracted from the outer surface of the outer shell 1 through the pressure bonding surface of the holding mold Q.

[Effects of the Invention] According to the present invention, in the window hole 2 drilled in the outer shell body 1, the press-fitting body 4 installed in contact with the window hole 2 portion in the outer shell body 1 is inserted into the outer shell body 1. The injection filling pressure of the injected inner core body 3 allows the outer shell body 1 and the press-fit body 4 to be integrally pressed and filled, and the outer shell body 1 and the press-fit body 4 are different in color, and by selecting the press-fit body 4 itself, the press-fit body 4
The color of the image can be changed arbitrarily.

Therefore, by appropriately changing the number of holes 2 drilled in the outer shell body 1 and the material of the press-fit body 4 press-fitted into the window holes 2, it is possible to freely combine a large number of colors.

Moreover, since it is possible to add the color of the inner core body 3 to the combination of the colors of the outer shell body 1 and the press-fit body 4, these variations become extremely diverse, and there are numerous types that could not be achieved before. You can create color patterns for objects.

on the other hand. In this production, the outer shell 1 obtained in the first step
The press-fit body 4 material installed in the second step is press-fitted into the window hole 2 in the third and fourth steps to form these outer shell bodies 1, 2.4.
After being integrated, these outer shells 1. Inner nuclear body 3. The press-fit bodies 4 are connected to each other, and even when a recoil impact force is applied during play, the ball does not separate, and the integrity of the ball is ensured. At the same time, since the outward opening surface of the window hole 2 coincides with the inner surface of the holding mold Q, it is ensured that a smooth continuous surface is formed between the outer surface of the press-fit body 4 exposed from the window hole 2 and the outer surface of the outer shell body 1. Make it.

As explained above, according to the present invention, a large number of colors can be freely used without being restricted by the color of the inner core body or the color of the outer shell body,
Not only can they be combined, but they are also suitable for mass production and have a large mass production effect, so they can be provided at low prices and are excellent in terms of cost.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a front view of the product, FIG. 2 is a sectional view thereof, and FIG. 3 is a sectional view of the inner core material in a state of being injected in the manufacturing method. Q...Holding type, P...Press-in machine. 1...Outer shell, 2...Fenestra, 3...Inner core, 4...
...Press-fit body, Utility model registration applicant: Sankei Gomu IvA Co., Ltd. Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1. A highly resilient inner shell made by injecting and solidifying a highly resilient inner core into a highly resilient hollow outer shell having an appropriately thick wall and having a window hole of an appropriately shaped shape. In a real ball, a press-fitting body, which is different in color from the outer shell body and has a plate shape with high elasticity and is installed at the window hole site on the inner surface of the outer shell body, is pressed into the window hole by the injection filling pressure of the inner core body. A highly elastic solid ball characterized by being integrally press-filled and having a smooth continuous surface formed between the outer surface of the window hole and the outer surface of the outer shell. 2. A first step of forming an outer shell having an appropriate wall thickness with window holes made of a highly elastic material, and a fluid state having an appropriate wall thickness and a color different from that of the outer shell. a second step of installing the press-fit body material from the inner surface window hole portion of the outer shell body near the periphery;
The outer shell body with the press-fitting body installed inside is placed in a suitable holding mold, and the fluidized inner core material is injected into the holding mold from a specified press-fitting machine. A fourth step of press-fitting the body material into the window hole and filling the holding mold with the inner core body material to solidify the outer shell body, the press-fit body, and the inner core body together. A method for producing a rich solid ball.