JPH0461802A - Manufacture of earring - Google Patents

Abstract

PURPOSE:To dispense with the forming process of a mounting hole and conceal a small gas extraction hole in appearance by utilizing the gas extraction hole bored in an earring body when it is completed as the mounting hole for earring. CONSTITUTION:The opposed ends of C-shaped original formation member coated with 18 gold alloy are cut to expose the bronze faces, and the bronze faces are impregrated and melted in nitric acid solution, thereby forming a hollow shell body. On both opening parts of the hollow shell body, covers 3 are brazed to complete an earring body 4. As the covers 3, those with small holes 2 are used. Pin pieces 7 are welded to right and left outside edges of ear holding curved-piece 6 of an earring metal member 5 being sold. The earring metal member 5 is positioned between both spaced end faces of the body 4 and the right and left pin members 7 are inserted in the gas extraction small holes 2 bored in both the spaced end faces, then the body 4 is positioned to swing freely against the metal member 5. It is thus possible to dispense with the working process for mounting the earring metal member to thereby improving production performance.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing earrings that allows easy manufacturing of lightweight earrings.

[Conventional technology]

Conventionally, the method of forming lightweight earrings with hollow ornaments is to form, for example, a C-shaped model with solder alloy.
The surface of this C-shaped prototype is coated with an 18-karat gold alloy coating by electroforming, and both ends of the C-shaped prototype coated with the 18-alloy metal are cut off to expose the solder alloy. A hollow shell made of 18-karat gold alloy is prepared by melting the 18-karat gold alloy, and closing lid plates are bonded to both ends of this shell by brazing to form a hollow decorative body.Earring fittings are attached to this decorative body. A method of manufacturing earrings has been proposed.

However, in this conventional method, when brazing the closing cover plates to both ends of the shell, a gas vent is used to vent the gas generated by brazing and to prevent the internal pressure from increasing due to air expansion inside the shell. Since the small holes are formed on the surface of the shell, the small holes are visible on the finished decorative body, resulting in a very unsightly appearance.

[Problem to be solved by the invention]

The present invention eliminates the process of forming the mounting hole by using the small gas vent hole that is inevitably drilled in the completed ornament as the mounting hole for attaching the earring fittings, and also eliminates the need for the small gas vent hole. The technical problem is to provide a manufacturing method for manufacturing earrings that are not conspicuous in appearance.

[Means to solve the problem]

The present invention will now be described in detail with reference to the accompanying drawings.

A prototype is formed from a meltable material, a metal coating layer 1 is formed on the surface of the prototype by electroplating or electroforming, and a part of the coated prototype on which the metal coating layer 1 is formed is cut out to create a coated prototype. Opposing free end surfaces were formed, and the coated prototype was melted to provide a metal shell with openings formed on the left and right sides, and small gas vent holes 2 were bored in both openings of this shell. A decorative body 4 is formed by adhering the obstructing lid plate 3 with brazing, and on the other hand, shaft pins 7 are made to protrude outward on the left and right sides of the ear hook curved rod 6 of the earring metal fitting 5, and this earring metal fitting 5 is attached to the decorative body 4.
The earrings are formed by disposing the earrings between the obstructing cover plates 3 and fitting the two left and right shaft pins 7 of the earring fittings 5 into the small gas vent holes 2 formed in the obstructing cover plate 3. This relates to a method for manufacturing earrings.

[Function and Examples]

First, a C-shaped prototype is formed from brass.

The prototype is not limited to brass, but may be made of any material that can be melted, such as solder alloy or aluminum alloy wax.

The surface of this C-shaped prototype is coated with an 18-alloy gold film by electroforming (or may be coated by electroplating).

Incidentally, various conditions such as electroforming temperature are the same as usual.

Next, the opposing free end surfaces of the C-shaped master mold coated with 18-karat gold alloy are cut off to expose the brass.

This prototype was immersed in a nitric acid solution and the brass was melted.
Forms a hollow shell.

Conditions such as the concentration of the nitric acid solution, the nitric acid temperature, and the impregnation time are as usual.

In addition, when the master mold is formed of a solder alloy, the solder alloy is melted by heating, and when the master mold is formed of an aluminum alloy, it is melted with a hydrochloric acid solution or a caustic soda solution.

Next, the closure cover plate 3 is soldered to both openings of this hollow shell body to complete the decorative body 4.

This closing cover plate 3 is provided with small gas vent holes 2.

Conditions such as pressure and temperature during brazing are as usual.

During brazing, the gas led out from the hollow shell body is discharged to the outside through the small gas vent holes 2.

Subsequently, the shaft pins 7 are welded to the right and left outer edges of the ear hook curved rod 6 of the commercially available earring fittings 5 prepared in advance.

This earring fitting 5 is positioned between both free end surfaces of the ornament 4, and the left and right shaft pins 7 are fitted into the small gas vent holes 2 formed in both free end surfaces, and the ornament 4 is placed against the earring fitting 5. is provided so that it can swing freely.

The drawing shows a bulge at the base of the shaft pin 7 in order to prevent both free end surfaces of the decorative body 4 from coming into contact with the outer edges of the ear-clamping curved rod 6 and preventing the decorative body 4 from swinging smoothly. This is the case where part 8 is formed.

Since the earrings according to the present invention allow the user to easily attach and detach the earring metal fittings 5 and the decorative body 4, any decorative body 4 can be used.
The user can easily attach the ring to the earring fittings 5 according to his/her preference, and the ring-shaped reinforcing ornament 9 can be fitted to the ornament 4 as appropriate, as shown in FIG. Therefore, the earrings have a high commercial value. It goes without saying that the -1 reinforcing decoration body 9 is not limited to one having a hollow interior.

〔Effect of the invention〕

Since the present invention is made as described above, the small gas vent hole that is always necessary when brazing the closing cover plate can be used as the mounting hole for the earring fittings, and therefore can be used as a decoration for attaching the earring fittings. This eliminates the need for other processing steps, which increases productivity, and since the shaft pin of the earring fittings is inserted into the gas vent hole, the gas vent hole no longer looks dull, making it possible to manufacture earrings that look better. becomes possible.

As described above, the present invention is an earring that is excellent in mass production, has a good appearance, and has a lightweight decorative body that swings very smoothly, producing earrings with high commercial value that create a sense of beauty for the viewer. This will provide a manufacturing method for

[Brief explanation of drawings]

FIG. 1 is a perspective view of an earring manufactured according to the present invention, FIG. 2 is an explanatory diagram showing a part of the manufacturing process of the present invention, FIG. 3 is a sectional view of an earring manufactured according to the present invention, and FIG. FIG. 2 is a perspective view of the earrings manufactured according to the invention in which a reinforcing ornament is fitted. DESCRIPTION OF SYMBOLS 1... Metal coating layer, 2... Gas vent small hole, 3... Obstruction cover plate, 4... Decorative body, 5... Earring fittings, 6
...Ear clamp curved rod, 7...Axle pin. 1990

Claims (1)

[Claims] A master mold is formed from a meltable material, a metal coating layer is formed on the surface of the master mold by electroplating or electroforming, and a part of the coated master mold on which this metal film layer has been formed is cut out and released facing the coated master mold. A closed cover plate in which an end surface is formed, a metal shell is formed by melting the coated prototype and openings are formed on the left and right sides, and small gas vent holes are bored in both openings of the shell. are soldered and bonded to form a decorative body, while shaft pins are made to protrude outward on the left and right sides of the ear hook curved rod of the earring metal fitting, and the earring metal fitting is arranged between the closing lid plates of the decorative body, A method for manufacturing earrings, characterized in that the earrings are formed by fitting two left and right shaft pins of an earring fitting into small gas vent holes drilled in a closing cover plate.