JPS60141363A - Production of multi-layer base metal - Google Patents

Abstract

PURPOSE:To improve appearance and to eliminate thoroughly exfoliation of respective layers after production by laminating and uniting plural noble metals by a casting method without using welding, etc. thereby making the boundaries between the respective layers distinct. CONSTITUTION:A molten metal for the 1st layer is cast into a casting mold d1 formed by using a prototype b1 for the 1st layer to form a base metal a1 for the 1st layer. Only the prototype b2 is removed from a rubber mold e2 formed by attaching the base metal a1 to the prototype b2 for the 2nd layer, thus manufacturing a casting mold d2. A molten metal for the 2nd layer is cast into the mold d2 to form a base metal a2 for the 2nd layer united to the base metal a1. A base metal a3 for the 3rd layer fitted tightly and united to the base metals a1, a2 of the 1st layer and the 2nd layer is thereafter formed similarly until finally a multi-layered base metal A is completed.

Description

【発明の詳細な説明】 本発明は、プラチナ、ホワイトゴールド及び金、銀、銅
等の合金を多層に一体化形成した多層地金の製造方法に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a multilayer base metal in which platinum, white gold, and alloys of gold, silver, copper, etc. are integrally formed in multiple layers.

この多層地金は各層を構成する貴金属の色調の違いによ
り装飾効果を発揮して、主に装身具等に加工されるもの
である。This multi-layer metal has a decorative effect due to the different color tones of the precious metals that make up each layer, and is mainly processed into jewelry.

従来この種の地金を製造する場合、各層を所用の貴金属
を用いて別々に成形し、各層を溶接やロウ等により互い
に積層ブ体化して製造していた。その為に、各層を一体
化している溶接層やロウ層が現出露呈して頗る外観が悪
（、商品価値を減殺してしまうと共に、各層を曲線状に
積層一体化したり製造した多層地金を圧延加工すること
がほとんど出来なかった。Conventionally, when manufacturing this type of ingot, each layer was formed separately using the required noble metal, and the layers were laminated together by welding, brazing, etc. to form a block. As a result, the welded layers and brazing layers that integrate each layer are exposed and give a bad appearance (which reduces the product value), and the multilayer base metal manufactured by laminating and integrating each layer in a curved shape has a bad appearance. It was almost impossible to roll it.

本発明はこの様な従来法の欠点に鑑みて、各層を溶接や
ロウ等を用いることなく鋳造法により積層一体化するこ
とにより、見栄えが良く商高価値の高い多層地金が１η
られると共に、各層を直線はもとより曲線状に積層一体
化したり、製造した多層地金を圧延加工することが出来
る多層地金の製造方法を提供せんとするものである。In view of the shortcomings of the conventional method, the present invention integrates each layer by a casting method without using welding or brazing, thereby creating a multi-layer metal with good appearance and high commercial value.
In addition, it is an object of the present invention to provide a method for manufacturing a multilayer metal ingot, in which each layer can be laminated and integrated in a curved shape as well as in a straight line, and the manufactured multilayer metal can be rolled.

係る目的を達成する本発明方法は、各層を形成する各原
型を各層毎に分離自在に構成し、第１層用原型を用いて
鋳型を作りこの鋳型に第１層用の溶融金属を鋳込んで第
１層目の地金を形成し、次に第２層用原型に前記第１層
目の地金を添接させてゴム型を作り、このゴム型から第
２層用原型のみを抜き取って鋳型を作りこの鋳型に第２
層用の溶融金属を鋳込んで第１層目の地金と一体化した
第２層目の地金を形成し、以下同様にして次の原型に前
の工程で形成した地金を添接させてゴム型を作り、その
ゴム型から原型のみを抜き取って鋳型を作りこの鋳型に
次の雇用の溶融金属を鋳込んで前の工程で形成した地金
と一体化させる事を特徴としたものである。The method of the present invention that achieves the above object consists of configuring each pattern forming each layer so that each layer can be separated, forming a mold using the pattern for the first layer, and casting molten metal for the first layer into this mold. Form the first layer base metal, then attach the first layer base metal to the second layer prototype to make a rubber mold, and extract only the second layer prototype from this rubber mold. Make a mold and put the second mold into this mold.
Molten metal for the layer is cast to form a second layer base metal that is integrated with the first layer base metal, and the base metal formed in the previous process is attached to the next prototype in the same manner. This method is characterized by making a rubber mold, extracting only the original form from the rubber mold to make a mold, and pouring the next molten metal into this mold to integrate it with the base metal formed in the previous process. It is.

図示実施例では３層（３色）よりなる多層地金を製造す
る場合を示したが、４層、５層又それ以上の多層であっ
ても製造できることは、以下の説明によって容易に理解
されるだろう。Although the illustrated embodiment shows a case where a multi-layer ingot is made of three layers (three colors), it will be easily understood from the following explanation that it can be made with four, five or more layers. It will be.

又、図示実施例では各層を直線状に積層一体化した多層
地金（第１図）を製造する場合を示したが、第２図に示
すような各層を曲線状に積層一体化した多層地金であっ
ても同じ原理で製造できることは、以下の説明によって
容易に理解されるだろう。In addition, although the illustrated embodiment shows the case of producing a multilayer base metal (Fig. 1) in which each layer is laminated and integrated in a straight line, it is possible to manufacture a multilayer base metal in which each layer is laminated and integrated in a curved shape as shown in Fig. 2. It will be easily understood from the following explanation that even gold can be manufactured using the same principle.

以下、本発明実施の一例を図面に基づいて、製造工程順
に説明する。Hereinafter, an example of implementing the present invention will be explained based on the drawings in the order of manufacturing steps.

第１図は製造された多層地金（Ａ）の斜視図であり、図
中（ａりは例えばプラチナまたはホワイトゴールドから
なる白色の第１層、（ａｌ）は例えば金と銀の合金から
なる黄色の第２層、（ａ３）は例えば金と銅の合金から
なる赤色の第３層である。第２図における多層地金（Ａ
）も同様の３Ｎ（３色）からなっており、仮想線で示す
線に沿って切断して整形する。FIG. 1 is a perspective view of the manufactured multilayer metal (A), in which (a) is a white first layer made of, for example, platinum or white gold, and (al) is a white first layer made of, for example, an alloy of gold and silver. The yellow second layer (a3) is the red third layer made of, for example, an alloy of gold and copper.
) is also made of similar 3N (three colors), and is cut and shaped along the line shown by the imaginary line.

第３図は第１で示した多層地金（Ａ）を製造する原型（
Ｂ）の斜視図であり、図中（ｂｚ　）は第１Ｎ用原型、
（ｂｌ）は第２層用原型、（ｂ３）は第３層用原型で、
各々金属地金を用いて角棒形状に成形されると共に、各
層毎に分離自在に組合せ構成されている。図中（ｃｚ　
）は注入口（１）を成形する部分である。Figure 3 shows the prototype (
B) is a perspective view, in which (bz) is the first N prototype;
(bl) is the prototype for the second layer, (b3) is the prototype for the third layer,
Each of them is formed into a rectangular rod shape using a metal base metal, and each layer is assembled so as to be separable. In the figure (cz
) is the part that molds the injection port (1).

而して、最初に第１層用原型（ｂｚ）を用いて鋳型（ｄ
ｌ）を作り、この鋳型（ｄｘ　）に第１層用の溶融金属
を鋳込んで第１層目の地金（ａｌ）を形成する。First, using the first layer prototype (bz), a mold (d
1) is made, and molten metal for the first layer is cast into this mold (dx) to form the base metal (al) for the first layer.

即ち、第１層用原型（ｂｌ）を用いて第４図に示す如く
シリコンゴム等でゴム型（ｅｌ）を作り、そのゴム型（
ｅｌ）を半割りして第１層用原型（ｂｉ）を抜き取り再
びゴム型（ｅｘ）を重ね合わせ、第１層用原型（ｂｚ　
）を抜き取ったあとの空洞にワックスを流し込んで第１
層用原型（ｂｘ）と同形のワックス型を作り、次いでこ
のワックス型を石膏の中に埋没させ、石膏が凝固後電気
炉内で内部のワックス型を燃焼除去して鋳型（’ｄｘ）
を作る（第５図参照）。That is, as shown in FIG. 4, a rubber mold (el) is made of silicone rubber or the like using the first layer prototype (bl), and the rubber mold (
el) in half, pull out the first layer prototype (bi), overlap the rubber mold (ex) again, and make the first layer prototype (bz
) Pour wax into the cavity after removing the
A wax mold of the same shape as the layer pattern (bx) is made, then this wax mold is buried in plaster, and after the plaster solidifies, the internal wax mold is burned off in an electric furnace to create the mold ('dx).
(See Figure 5).

そして、この鋳型（ｄｌ）内に注入口（１）から第１層
用の溶融金属（実施例ではプラチナ）を鋳込んで第１層
目の地金（ａｘ　）を形成する。Then, molten metal for the first layer (platinum in the embodiment) is poured into the mold (dl) from the injection port (1) to form the base metal (ax) for the first layer.

次に第６図に示す如く第２層用原型（ｂｌ）に前に形成
した第１層目の地金（ａｌ）を原型（Ｂ）の通りの位置
に添接させてそのゴム型（ｅｌ）を作る。その際、第１
層目の地金（ａｘ　）の注入口部分は除去すると共に、
第２層用原型（ｂｌ）に注入口を成形する部分（ｃｚ）
を取付ける。そして、このゴム型（ｅｌ）を半割りして
第２層用原型（ｂｌ）のみを抜き取り再びゴム型（ｅｌ
）を重ね合わせ、第２層用原型（ｂｌ）を抜き取ったあ
との空洞にワックスを流し込んで第１層目の地金（ａｌ
）と密着したワックス型を作る。この際第１層目の地金
（ａｌ）を１００〜１５０℃に熱して注入したワックス
との密着性を良くする。次いでこのワックス型を石膏の
中に埋没させ、石膏が凝固後電気炉内で内部のワックス
型を燃焼除去して鋳型（ｄｚ）を作る（第７図参照）。Next, as shown in FIG. 6, the first layer base metal (al) previously formed is attached to the second layer pattern (bl) at the exact position of the pattern (B), and the rubber mold (el) is attached. )make. At that time, the first
The inlet part of the base metal (ax) of the layer is removed, and
The part where the injection port is formed on the second layer master mold (bl) (cz)
Install. Then, this rubber mold (el) is cut in half, only the second layer master mold (bl) is extracted, and the rubber mold (el) is removed again.
), and after removing the second layer prototype (bl), wax is poured into the cavity to form the first layer base metal (aluminum).
) and make a wax mold that is in close contact with it. At this time, the first layer base metal (aluminum) is heated to 100 to 150°C to improve adhesion with the injected wax. Next, this wax mold is buried in plaster, and after the plaster solidifies, the internal wax mold is burned off in an electric furnace to create a casting mold (dz) (see Figure 7).

そしてこの鋳型（ｄｚ）内に注入口（１）から第２層用
の溶融金属（実施例では金と銀の合金）を鋳込んで第１
層目の地金（ａｘ）と密着一体化した第２Ｎ目の地金（
ａｌ）を形成する。Then, the molten metal for the second layer (in the example, an alloy of gold and silver) is poured into the mold (dz) from the injection port (1), and the second layer is poured into the mold (dz).
The 2Nth base metal (ax) that is closely integrated with the base metal (ax) of the layer
form al).

そして、最後の第３層目の地金（ａ３）を形成する場合
も第２層目の地金（ａｌ）を形成する場合と同様、第３
層用原型（ｂ３）に第１層目の地金（ａｌ）と密着一体
化した第２層目の地金（ａｌ）を原型（Ｂ）の通りの位
置に添接させてそのゴム型（ｅ３）を作る（第８図参照
）。When forming the final third layer of metal (a3), the third layer is formed in the same way as when forming the second layer of metal (al).
The second layer base metal (al), which is closely integrated with the first layer base metal (al), is attached to the layer base metal (b3) at the position shown in the base shape (B), and the rubber mold ( e3) (see Figure 8).

そして、このゴム型（ｅ３）から第３層用原型（ｂ、）
のみを抜き取ってワックス型を作り、このワックス型で
鋳型（ｄ３）を作って（第９図参照）、注入口（１）か
ら第３層用の溶融金属（実施例では金と銅の合金）を鋳
込んで第１層目及び第２層目の地金（ａｘ　）　（ａｚ
　）と密着一体化した第３層目の地金（ａ３）を形成し
、最後に注入口部分（２）と上部（２′）を指示線（イ
）（ロ）に沿って除去すれば第１図に示す如き多層地金
（Ａ）が完成する。Then, from this rubber mold (e3), the master mold for the third layer (b,)
A wax mold is made by extracting the chisel, a mold (d3) is made from this wax mold (see Figure 9), and molten metal (gold and copper alloy in the example) for the third layer is poured from the injection port (1). is cast to create the first and second layer bullion (ax) (az
), form the third layer of base metal (a3) that is tightly integrated with A multilayer metal ingot (A) as shown in Figure 1 is completed.

本発明は斯様に多層地金を製造するようにしたので、各
層の間に接合層（物）が全く存在せず各層の境界がはっ
きりとした見栄えの良い商品価値の高い多層地金が得ら
れると共に、各層を直線はもとより曲線状に積層一体化
したものも簡単に製造することが出来る。Since the present invention manufactures a multi-layer ingot in this manner, a multi-layer ingot with good appearance and high commercial value, with no bonding layer (material) between each layer and clear boundaries between the layers, can be obtained. At the same time, it is also possible to easily manufacture products in which each layer is laminated not only in a straight line but also in a curved shape.

しかも、各層は鋳造により積層一体化している為、製造
後各層が剥離したり分離する虞れが全くなく、圧延加工
をすることも可能である。Moreover, since each layer is laminated and integrated by casting, there is no risk of each layer peeling off or separating after manufacturing, and rolling processing is also possible.

よって、所期の目的を達成し得る。Therefore, the intended purpose can be achieved.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明に係る製造方法の１実施例を示し、第１図
は製造した多層地金の１実施例を示す斜視図、第２図は
同他の実施例を示す正面図、第３図は原型の斜視図、第
４図は第１層目を形成するゴム型の一部切欠斜視図、第
５図は同鋳型の一部切欠斜視図、第６図は第２層目を形
成するゴム型の一部切欠斜視図、第７図は同鋳型の一部
切欠斜視図、第８図は第３層目を形成するゴム型の一部
切欠斜視図、第９図は同鋳型の一部切欠斜視図、第１０
図は第９図の鋳型で成形された状態の地金の正面図であ
る。 図中、（Ａ）は多層地金、（ａｌ）は第１層目の地金、
（ａｌ）は第２層目の地金、（ａ３）は第３層目の地金
、（Ｂ）は原型、（ｂｌ）は第１層用原型、（ｂｌ）は
第２層用原型、（ｂ３）は第３層用原型、（ｄｚ　）　
（ｄｚ　）（ｄ３）は鋳型、（ｅｌ）　（ｅ２　）　（
４１３）はゴム型である。 特許出願人　みつわ眞珠工業株式会社The drawings show one embodiment of the manufacturing method according to the present invention, FIG. 1 is a perspective view showing one embodiment of the manufactured multilayer ingot, FIG. 2 is a front view showing another embodiment, and FIG. 3 is a perspective view of the prototype, FIG. 4 is a partially cutaway perspective view of a rubber mold forming the first layer, FIG. 5 is a partially cutaway perspective view of the same mold, and FIG. 6 is a partially cutaway perspective view of the same mold forming the second layer. Fig. 7 is a partially cutaway perspective view of the rubber mold, Fig. 8 is a partially cutaway perspective view of the rubber mold forming the third layer, and Fig. 9 is a partially cutaway perspective view of the same mold. Partial cutaway perspective view, No. 10
The figure is a front view of the base metal molded with the mold of FIG. 9. In the figure, (A) is multi-layered metal, (al) is first layer metal,
(al) is the second layer metal, (a3) is the third layer metal, (B) is the prototype, (bl) is the first layer prototype, (bl) is the second layer prototype, (b3) is the prototype for the third layer, (dz)
(dz) (d3) is the mold, (el) (e2) (
413) is a rubber type. Patent applicant Mitsuwa Maju Kogyo Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 各層を形成する各原型を各層毎に分離自在に構成し、第
１Ｎ用原型を用いて鋳型を作りこの鋳型に第１層用の溶
融金属を鋳込んで第１層目の地金を形成し、次に第２層
用原型に前記第１層目の地金を添接させてゴム型を作り
、このゴム型から第２層用原型のみを抜き取って鋳型を
作りこの鋳型に第２層用の溶融金属を鋳込んで第１層目
の地金と一体化した第２層目の地金を形成し、以下同様
にして次の原型に前の工程で形成した地金を添接させて
ゴム型を作り、そのゴム型から原型のみを抜き取って鋳
型を作りこの鋳型に次の雇用の溶融金属を鋳込んで前の
工程で形成した地金を添接させてゴム型を作り、そのゴ
ム型から原型のみを抜き取って鋳型を作りこの鋳型に次
の雇用の溶融金属を鋳込んで前の工程で形成した地金と
一体化させる事を特徴とした多層地金の製造方法。The master molds forming each layer are configured to be separable for each layer, a mold is made using the first N master mold, and the molten metal for the first layer is poured into this mold to form the base metal of the first layer. Next, a rubber mold is made by attaching the first layer base metal to the second layer pattern, and a mold is made by removing only the second layer pattern from this rubber mold. molten metal is cast to form a second layer of base metal that is integrated with the first layer base metal, and the same process is repeated to attach the base metal formed in the previous process to the next prototype. Make a rubber mold, extract only the original form from the rubber mold, make a mold, pour the next molten metal into the mold, attach the base metal formed in the previous process to make a rubber mold, and make the rubber mold. A method for manufacturing a multi-layer metal ingot, which is characterized in that a mold is made by extracting only the prototype from the mold, and the next molten metal is poured into the mold to be integrated with the metal formed in the previous process.