JPH07241204A - Hollow polyhedral sphere and its production - Google Patents

Abstract

PURPOSE:To easily and safely form plural hollow polyhedral spheres in a series of continuous stages. CONSTITUTION:Plural connecting members 8 having stopper projections 2 at both ends are previously formed as a series of bar-shaped bodies 1 via disconnecting parts 3 and metallic cylindrical bodies 5 are fitted onto these bar-shaped bodies 1. These metallic cylindrical bodies 5 are then drawn from one end side on their outer peripheries in the respective positions between the stopper projections 2 exclusive of the disconnecting parts 3 of the bar-shaped bodies l to form the state in which the hollow spheres 7 continue. These continuous hollow spheres 7 and connecting members 8 are bent and disconnected and are formed to a continuous chain form. The respective hollow spheres 7 are then formed to the hollow polyhedral spheres by cutting and, thereafter, the stopper projections 2 of the continuous members 8 are dissolved away by chemicals and are removed from the hollow polyhedral spheres. The individual hollow polyhedral spheres are thus obtd.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow polyhedral sphere for easily molding a plurality of hollow polyhedral spheres in a series of continuous steps and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, precious metal hollow polyhedral spheres used for ornaments and the like have a process in which a precious metal pipe material is appropriately drawn from the outer peripheral side to sequentially form hollow spheres, and a process of separating these hollow spheres. It is formed by two processes, a chamfering process in which each hollow sphere is cut to form a polyhedral sphere.

[0003]

However, in the case of such a process, first of all, since the noble metal pipe is provided only with a constant length, the pipe material with a constant length is lost during continuous molding. And the following pipe material has to be set, which is troublesome and has a problem that greatly affects the manufacturing cost, and the diameter and length of the pipe generally provided are constant and standardized, There is also a problem that only certain hollow spheres can be molded.

Further, since the cut hollow spheres are cut one by one, the work is very delicate and requires skill and is troublesome.

Therefore, in view of the above-mentioned problems and the like, the present invention has been made as a subject to make it possible to mold a plurality of hollow polyhedral spheres easily and inexpensively in a series of continuous steps.

[0006]

According to the present invention, in a hollow polyhedral sphere, a plurality of connecting members having retaining projections at both ends are connected continuously via a separating portion which can be separated by bending. Formed as a series of rod-shaped bodies, a metal plate is formed into a cylindrical shape on the rod-shaped body, and the rod-shaped bodies are externally fitted to each other. One piece at each position, the externally fitted metal tubular body is successively narrowed from one end side of the outer periphery until it comes close to the diameter of the connecting member to form a continuous hollow sphere, and these continuous hollow spheres are formed. Along with bending and separating, the connecting member is also bent and separated from the separating portion to form a continuous chain shape by each hollow sphere and the separated connecting member, and each hollow sphere is separated as much as possible, in that state, Cutting is applied to the surface of the hollow sphere. The subjected formed multifaceted spheres, by forming separated individually extracted from the multifaceted spheres dissolved and removed by chemicals the retaining projection of the connecting member, to solve the problems described above.

Further, in the method of manufacturing a hollow polyhedral sphere,
In advance, a plurality of connecting members having retaining protrusions at both ends are formed as a series of rod-shaped bodies that are continuous via a cutting portion that can be cut by bending, and a metal plate is attached to the rod-shaped body. It is formed into a tubular shape, and then externally fitted, and then the externally fitted metal tube is fitted once at each position between the retaining projections other than the cut-off portion of the rod-shaped body continuous in the series. Squeeze the shape from one end side of the outer circumference until it comes close to the diameter of the connecting member to form a continuous hollow sphere, and then bend and separate these continuous hollow spheres, and also bend the connecting member from the cutout. Separated and formed into a continuous chain shape by each hollow sphere and the separated connecting member respectively, then, separate each hollow sphere as much as possible,
In that state, the surface of each hollow sphere is subjected to cutting to form a hollow polyhedral sphere, and then the retaining projection of the connecting member is dissolved and removed by a chemical capable of dissolving this connecting member from the hollow polyhedral sphere. The above-mentioned problems are solved by using individual hollow polyhedral spheres that are extracted and separated.

[0008]

The hollow polyhedral sphere according to the present invention and the method for manufacturing the hollow polyhedral sphere include a series of continuous connecting members having a plurality of connecting members each having a retaining projection at both ends thereof, which are separated from each other by bending the connecting members. The rod-shaped body is formed in advance, and a metal plate is formed into a cylindrical shape on the rod-shaped body to be externally fitted, and then the retaining projections other than the cut-off portion of the continuous rod-shaped body are joined together. One at each position in between, the externally fitted metal tubular body is successively squeezed from one end side of the outer periphery until it comes close to the diameter of the connecting member to form a continuous hollow sphere, and then these continuous spheres are formed. The hollow sphere is bent and separated, and the connecting member is also separated from the cut portion.

Then, the hollow spheres and the connecting members separated from each other are formed into a continuous chain.

Next, the hollow spheres are separated from each other as much as possible, and in this state, the surface of each hollow sphere is cut to form a hollow polyhedral sphere. As a result, in the past, the cutting work was performed on each separated hollow sphere one by one, so it became a very detailed work, and the work that required skill and time was formed into a series of chain shapes. It is possible to perform continuous cutting with an instrument.

Thereafter, the retaining projections of the connecting member are dissolved and removed by a chemical capable of dissolving the connecting member and extracted from the hollow polyhedral sphere into individual hollow polyhedral spheres. A sphere is molded.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

That is, FIGS. 1 to 4 show the steps of the present invention. First, as shown in FIG.
Alternatively, a separating portion 3 which can be separated by bending a plurality of connecting members 8 having retaining protrusions 2 and 2 at both ends by appropriately pressing a thin rod made of other nickel alloy.
It is formed as a series of rod-shaped bodies 1 continuous with each other.

Next, gold or gold alloy,
A metal plate 4 made of platinum or a platinum alloy is formed into a tubular shape to form a metal tubular body 5, and then a retaining protrusion other than the cut-off portion 3 of the rod-shaped body 1 continuous in the above series. The above-mentioned externally fitted metal cylinder 5 is provided at one position at each position between 2 and 2.
From the one end side of the outer periphery thereof until it comes close to the diameter of the connecting member 8 to form the narrowed portion 6, the hollow spheres 7 are formed into a continuous state, and then these continuous hollow spheres 7 are formed. In addition to bending and separating, the connecting member 8 is also bent and separated from the separating portion 3 to form a continuous chain shape by the hollow spheres 7 and the connecting members 8 respectively separated (see FIG. 2).

Then, as shown in FIG. 3, the hollow spheres 7 are separated from each other as much as possible, and in this state, the surface of each hollow sphere 7 is a polyhedral molding machine (not shown) which is an automatic cutting machine. ) To continuously form the hollow polyhedral sphere 9.

Finally, a member composed of the continuous connecting member 8 in the form of a chain and the hollow polyhedral sphere 9 is a chemical capable of dissolving the monel material forming the connecting member 8, specifically, nitric acid 50. % And water 50% to dissolve and remove at least the retaining projections 2, 2 of the connecting member 8 and draw the connecting member 8 out of the hollow polyhedral sphere 9 as shown in FIG. The hollow polyhedral spheres 9 are formed separately from each other.

In this way, each hollow sphere 7 and connecting member 8
Due to the continuous chain formation by the above, compared to the case where cutting is performed as a separate material one by one as in the conventional case, in the conventional case it has to be set in the processing machine one by one. However, if the above-mentioned chain shape is used, the polyhedron forming machine, which is an automatic processing machine, can be set as it is to perform automatic molding, resulting in extremely excellent productivity.

In the present invention, the hollow sphere 7 and the connecting member 8 are used.
Is not limited to the above-described embodiment, and any chemical that can dissolve the connecting member 8 can be used as long as it does not dissolve the formed hollow polyhedral sphere 9 but only the connecting member 8. Anything is fine. Needless to say, the other configurations are not limited to the above-described embodiment.

[0019]

According to the present invention thus formed, a plurality of connecting members 8 having retaining projections 2 and 2 at both ends are provided in advance.
Is formed as a series of rod-shaped bodies 1 that are continuous via a cut-off portion 3 that can be cut off by bending, and a metal plate 4 is formed in a cylindrical shape on the rod-shaped body and externally fitted. ,next,
The externally fitted metal cylindrical body is sequentially arranged from one end side of the outer periphery, one at each position between the retaining projections 2 and 2 other than the cut-off portion 3 of the rod-shaped body 1 continuous in the series. The hollow spheres 7 are formed into a continuous state by narrowing down to a diameter close to the connecting member 8, and then the continuous hollow spheres 7 are bent and cut off, and the connecting member 8 is also cut off from the cut portion.

Then, the hollow spheres 7 and the connecting members 8 separated from each other can be formed into a continuous chain.

Next, the hollow spheres 7, 7 are separated from each other as much as possible, and in this state, the surface of each hollow sphere 7 is cut to form a hollow polyhedral sphere 9. As a result, in the past, the cutting work was performed on each separated hollow sphere one by one, so it became a very detailed work, and the work that required skill and time was formed into a series of chain shapes. Since it can be set on a machine and continuously cut, it can be made extremely excellent in productivity.

After that, the retaining projections 2 of the connecting member 8 are
Since 2 is dissolved and removed by a chemical capable of dissolving the connecting members 2 and 2 and extracted from the hollow polyhedral sphere 9 to form individual separated hollow polyhedral spheres 9, the hollow polyhedral sphere is formed by a series of continuous steps.

Therefore, according to the present invention, various excellent effects can be obtained such that a plurality of hollow polyhedral spheres can be easily and inexpensively formed in a series of continuous steps.

[Brief description of drawings]

FIG. 1 is a front view showing a molding state until a series of chains is formed in an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a series of chain-shaped portions in FIG.

FIG. 3 is an enlarged front view of a product having a hollow polyhedral sphere according to an embodiment of the present invention.

FIG. 4 is an enlarged front view showing a state in which hollow polyhedral spheres according to an embodiment of the present invention are individually separated.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Bar-shaped body 2 Detachment | protrusion protrusion 3 Cut-off part 4 Metal plate 5 Metal cylinder 6 Narrowing part 7 Hollow sphere 8 Connecting member 9 Hollow polyhedral sphere

Claims (2)

[Claims] 1. A plurality of connecting members having retaining projections at both ends are formed as a series of rod-shaped bodies that are continuous through a cut portion that can be cut by bending, and the rod-shaped body is provided with a metal. The plate is formed into a tubular shape, and is fitted to the outside, and the outside fitted metal tubular body is provided at one position at each position between the retaining projections other than the cut-off portion of the rod-shaped body continuous in the series. From the one end of the outer circumference until it comes close to the diameter of the connecting member to form hollow spheres in a continuous state, and fold and separate these continuous hollow spheres. Formed in a continuous chain by the sphere and the respective separated connecting members, separating each hollow sphere as much as possible, in that state, cutting the surface of each hollow sphere to form a polyhedral sphere, Retaining protrusion of the connecting member Hollow multifaceted spheres, characterized in that formed was separated into individual extracted from multifaceted spheres dissolved and removed by means of chemicals. 2. A hollow polyhedral sphere manufacturing method, wherein a plurality of connecting members having retaining projections at both ends are connected in advance as a series of rod-shaped bodies through a separating portion that can be separated by bending. The rod-shaped body is formed in advance, and a metal plate is formed into a tubular shape to be externally fitted, and then each of the gaps between the retaining protrusions other than the cut-off portion of the rod-shaped body that is continuous in the series is One by one at each position, the externally fitted metal tubular body is successively narrowed down from one end side of the outer periphery until it comes close to the diameter of the connecting member to form a continuous hollow sphere, and then these continuous hollow spheres are formed. Along with folding and separating, the connecting member is also folded and separated from the separating portion to form a continuous chain shape with each hollow sphere and the separated connecting member, and then each hollow sphere is separated as much as possible, Each hollow sphere in the state The surface is cut to form a hollow polyhedral sphere, and then the retaining projections of the connecting member are dissolved and removed by a chemical capable of dissolving the connecting member and extracted from the hollow polyhedral sphere. And a method for producing a hollow polyhedral sphere.