JPH0910360A - Manufacturing method of vinyl resin hollow balls in which a hieroglyphic object is movably incorporated - Google Patents

Abstract

(57) [Summary] [Purpose] To manufacture a vinyl resin hollow ball in which a figurine is embedded in a floating state. [Structure] After passing a thin wire 5 through an umbilicus 6 and fixing the figure 4 at its tip 5a, the umbilicus 6 is adhered to the inner wall of the lower mold 2 of the ball-molding mold for splitting the umbilicus 6 and for ball molding. After filling the lower mold 2 with an appropriate amount of the vinyl resin sol 8 described above, the upper and lower molds 1 and 2 are stacked and integrally fastened, and then the vinyl resin sol 8 is heated and melted while rolling over to form a ball 9. After that, the wire 5 is pulled out from the navel 6, so that the hieroglyphics 4 is separated from the navel 6 and movably incorporated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a vinyl resin hollow ball having a hieroglyphic object movably incorporated therein.

[0002]

2. Description of the Related Art Conventionally, PVC balls have become the mainstay, not only in the days when the balls were made of rubber, but they are still manufactured as three-dimensional objects fixed inside the balls, but they are figurative. The one that has been made into a floating state to make children more interested is not yet manufactured in Japan and other foreign countries.

[0003]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for manufacturing a vinyl resin hollow ball in which the above-mentioned figure is embedded in a floating state.

[0004]

In order to achieve the above object, a method for manufacturing a vinyl resin hollow ball in which a hieroglyphic object of the present invention is movably incorporated is a vinyl resin hollow ball having a cylindrical navel for injecting air. After passing a thin wire through the umbilicus and attaching a figure to the tip, attach the umbilicus to the inner wall of the ball-molding mold which is divided into two parts, and fill the mold with an appropriate amount of vinyl resin sol and The mold for split ball molding is integrally tightened, and the vinyl resin sol is heated and melted while making horizontal rolls to make balls, and then the wire is pulled out from the umbilicus to separate the hieroglyphics from the umbilicus and allow it to float. It is characterized by being built-in. In addition, a tape having heat resistance that can withstand heating during ball forming was wound and adhered to the cylindrical surface of the cylindrical umbilicus.

[0005]

According to the present invention, since the three-dimensionally formed hieroglyphic object is fixed by the fine wire passing through the center of the navel, the position of the die does not shift even if the die is rolled over and rolled up. This prevents the figure from contacting the vinyl resin sol and prevents the vinyl resin sol from adhering to the figure. Further, since the thin wire has flexibility, it can be easily pulled out from the navel after molding the ball, and by pulling out the wire, the hieroglyphic object can be in a floating state.

Further, since the umbilicus has a tape wound and adhered around its cylindrical shape, the umbilicus does not lose its shape even if the umbilicus is heated and melted at the time of ball molding, and a needle is inserted into the umbilicus to remove air. Even if the needle is removed after the injection, the elastic force is enhanced by the tightening effect of the tape, so that the injection hole can be completely closed and air leakage can be prevented.

[0007]

Embodiment 1 An embodiment of the present invention will be specifically described below with reference to the drawings. 1 and 2 show an embodiment of the present invention,
FIG. 1 is an explanatory view of the manufacturing method of the present invention with a partial cross section, and FIG. 2 is a sectional view of a ball manufactured by the manufacturing method of the present invention.

In FIG. 1, the mold for molding the ball 9 is a two-part mold composed of an upper mold 1 and a lower mold 2, the inside (molding surface) of which molds the outer peripheral surface of the ball 9. It has a spherical surface. The figuration 4 contained in the ball 9 is a spherical center b on the x-axis from a horizontal plane a generated when the ball molding vinyl resin sol 8 is filled in the mold surface of the lower mold 2.
The radius c is the distance c to the inside of the phantom sphere 3.

As described above, the reason for limiting the size of the hieroglyph 4 is that when the hieroglyph 4 is larger than the virtual sphere 3, the hieroglyph 4 is made of vinyl resin due to the overturning / vertical movement during molding of the ball 9. This is because the vinyl resin sol 8 may come into contact with the sol 8 and adhere to the figure 4 to impair the appearance. On the other hand, regarding the weight of the hieroglyph 4, if it is too heavy, the navel will be peeled off from the mold surface in the overturning and vertical rolling motion at the time of molding, and the position of the hieroglyph 4 will wobble. Since the resin sol 8 may be attached, it is preferable that the resin sol 8 is light so as not to hinder the resin sol 8, specifically about 1.5 gr within 2 gr.

The umbilicus 6 has a columnar shape, and a tape 7 having heat resistance capable of withstanding heating during ball molding is wound around the cylindrical surface and adhered with an adhesive. When fixing the figure 4 to the navel 6, a thin wire 5 is passed through the center of the navel 6, the end 5a of the wire is hooked on the figure 4, and the other end of the wire is attached to the end surface of the navel 6. The figure 4 is bent and fixed to the navel 6. The umbilicus 6 has its end face adhered and fixed to the molding surface of the lower mold 2 after the figure 4 is fixed.

After the navel 6 is attached to the lower mold 2, the required amount of vinyl resin sol 8 is filled in the molding surface of the lower mold 2 and the upper and lower molds 1 and 2 are integrally tightened. Mold 1 in this state
And 2 are heated by a molding machine (not shown) to give a horizontal motion and a vertical motion to rotate the vinyl resin sol 8 into a gel to mold the ball 9, and at the same time, the ball 9 is fused to the tape outer peripheral surface of the navel 6. Are integrally molded by.

After the formation of the ball 9 is completed, the end portion of the wire 5 exposed to the outside of the navel 6 is sandwiched by pliers or the like and pulled out, so that the hieroglyphics 4 separates from the navel 6 and enters the ball 9. And become free to move.

As the shape of the hieroglyphic object 4 in this manufacturing method, for example, a beautiful mari, which is of interest to children,
Various forms such as cubes such as dice or plate-like bodies such as playing cards and cards are used.

The tape 7 wound around the navel 6 prevents the navel 6 from softening and losing its shape due to heating during molding of the ball 9, and also inserts a needle into the navel 6 of the completed ball 9. When air is injected into the inside with tape 7,
Since the navel 6 is tightened from the outer circumference, the elastic force is strengthened, and when the needle is pulled out, the elastic force can completely close the hole and prevent air leakage. Further, by making the surface of the tape 7 golden or the like to improve the aesthetic appearance, it is possible to enhance the commercial value as compared with the case where the tape 7 is not used.

[0015]

According to the present invention, a vinyl resin hollow ball is movably incorporated with various shapes of a hieroglyphics, so that an infant or the like can have a peculiarity of the hibernation of the hibernation seen through the skin layer of the ball. It is possible to entice the player to become more interested in ball play.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a partially sectional manufacturing method showing an embodiment of the present invention.

FIG. 2 is a sectional view of a ball manufactured by the manufacturing method of the present invention.

[Explanation of symbols]

 1 Upper mold 2 Lower mold 3 Virtual sphere 4 Hieroglyph 5 Wire 5a Wire end 6 Navel 7 Tape 8 Vinyl resin sol 9 Ball

Claims (2)

[Claims] 1. A vinyl resin hollow ball having a columnar umbilicus for injecting air, in which a fine wire is passed through the umbilicus and a hieroglyphic object is fixed to the tip thereof, and then the inner wall of a ball molding die in which the umbilicus is divided into two. It is made by heating and melting the vinyl resin sol while adhering to it, filling the appropriate amount of vinyl resin sol for ball molding into the mold, tightening the two ball molding dies integrally, and rolling over and rolling vertically. A method of manufacturing a vinyl resin hollow ball in which a hieroglyphic object is movably embedded by separating the hieroglyphic object from the navel by sphering and then removing the wire from the navel. 2. The method for producing a vinyl resin hollow ball in which a hieroglyphic object according to claim 1 is movably incorporated, wherein a tape having a required heat resistance is wound and adhered on a cylindrical surface of a cylindrical umbilicus.