EP0195132A2 - Procédé de fabrication de bijoux en métaux précieux et bijoux ainsi obtenus - Google Patents

Procédé de fabrication de bijoux en métaux précieux et bijoux ainsi obtenus Download PDF

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Publication number
EP0195132A2
EP0195132A2 EP85116448A EP85116448A EP0195132A2 EP 0195132 A2 EP0195132 A2 EP 0195132A2 EP 85116448 A EP85116448 A EP 85116448A EP 85116448 A EP85116448 A EP 85116448A EP 0195132 A2 EP0195132 A2 EP 0195132A2
Authority
EP
European Patent Office
Prior art keywords
jewelry
metal
hollow
area
piece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP85116448A
Other languages
German (de)
English (en)
Other versions
EP0195132A3 (fr
Inventor
Rudolf Eberle
Herbert Kull
Wilfried Essert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Juwedor GmbH
Original Assignee
Juwedor GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Juwedor GmbH filed Critical Juwedor GmbH
Publication of EP0195132A2 publication Critical patent/EP0195132A2/fr
Publication of EP0195132A3 publication Critical patent/EP0195132A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D1/00—Electroforming
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C27/00—Making jewellery or other personal adornments
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D1/00—Electroforming
    • C25D1/04—Wires; Strips; Foils
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D1/00—Electroforming
    • C25D1/20—Separation of the formed objects from the electrodes with no destruction of said electrodes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00—Electroplating characterised by the article coated
    • C25D7/005—Jewels; Clockworks; Coins

Definitions

  • the invention relates to a method for producing jewelry made of metal, in particular noble metal, by electroplating, by electrolytically depositing the metal on an electrically conductive mold core that has the spatial contour of the jewelry and, after reaching the desired layer thickness, the material of the mold core by chemical or thermal means is released from the hollow jewelry body. Furthermore, the invention relates to jewelry manufactured by the method.
  • the mandrel is produced in a conventional manner in a negative model of the piece of jewelry by pouring out, in principle all materials that can be thermally or chemically liquefied or volatilized without the noble metal suffering are suitable as the material.
  • all materials that can be thermally or chemically liquefied or volatilized without the noble metal suffering are suitable as the material.
  • electrically conductive e.g. B. coated with metal.
  • the core material is then separated from the noble metal body either thermally or chemically, with either an opening being provided in the deposited noble metal layer or this being subsequently made through which the core material can exit.
  • metallic coated wax this can optionally be removed beforehand and the hollow mold core can then be inserted into the galvanic bath.
  • a hollow profile can be designed to be sufficiently stable against tensile and bending forces with a correspondingly large wall thickness, but a hollow profile with a small wall thickness is sensitive, for example, to abrasive or rubbing permanent stress, since the wall thickness is gradually removed with increasing use. It can also be used where the hollow profile is used for storing, guiding or fastening other parts, in particular moving parts damage.
  • the invention has for its object to further develop the above-mentioned method in such a way that high-quality jewelry with lasting stability can be produced.
  • the hollow jewelry body is provided with a solid area made of a metal in those areas of the piece of jewelry that are mechanically stressed during further processing or during the intended use.
  • pieces of jewelry of any kind can be produced with a small wall thickness, which nonetheless have permanent stability, even if they are heavily stressed in some areas, after the metal has been electroplated, in particular noble metal, on the solid or hollow mold core and after the core material has been removed the hollow jewelry body is subsequently filled with metal in this stressed area, so that the metal is there in solid form and the piece of jewelry stabilizes in these areas.
  • the jewelry body can be designed completely or partially as a closed hollow body.
  • the hollow connecting member at least partially filled with the metal.
  • the hollow end pieces are partially filled with the metal.
  • the hollow approaches are at least partially filled, while in the case of rings the hollow ring band is partially filled with the metal.
  • the metal is deposited in a smaller layer thickness at least on that part of the mandrel which lies outside the area to be filled later on the surfaces of the hollow jewelry body facing away from the visible side of the piece of jewelry.
  • This process creates a weaker wall thickness outside the area that will later be solidly formed, which can be separated out with little difficulty, so that the remaining part of the cavity, which is then accessible, can be filled in, while otherwise a kind of hollow relief is given.
  • the core material can be removed after the galvanoplastic production through the separated area.
  • the mandrel is electrolytically shielded, at least on the part that lies outside the area to be filled later on on the surfaces of the hollow jewelry body facing away from the visible side of the piece of jewelry, so that no metal is deposited there.
  • the cavity of the jewelry body is open to the outside with the exception of the area that is filled up massively.
  • the mold core is provided with linear depressions, elevations, edges or non-conductive covers at least on that part which lies outside the area to be filled later on the surfaces of the hollow jewelry body facing away from the visible side of the piece of jewelry , which leave a weakened predetermined breaking line in the deposited metal layer, it preferably being provided that the mold core is provided with two spaced-apart linear depressions, elevations, edges or covers and the metal layer lying therebetween is separated out of the jewelry body after the mold core has been removed .
  • the region that is not coated or that is to be removed is preferably located on the inner surfaces of the jewelry piece that face away from the visible side.
  • the two are spaced apart ordered edges on the mandrel are formed by the upper edges of a groove in the mandrel.
  • this groove leads to predetermined breaking lines occurring in the metal layer along the groove edges, so that the metal can be separated out without difficulty.
  • the ring groove on the mold core runs only in the area outside the area to be filled in later, so that the cavity is closed there and is open only to the sides.
  • the piece of jewelry 1 shown in a perspective view in FIG. 1 in the form of a ring 1 has an ornament in its upper region, the ring head 2.
  • the ring rail 4 as is usually the case, has a decreasing thickness from the ring head 2 to the lower region 3.
  • the entire ring is produced by a galvanoplastic process as a hollow body, the cross section of which can be seen approximately at the top of the ring rail 4 in the ring head 2 in FIG.
  • the decorative ring has on its inside a slot 5 which, as shown in particular in FIG. 4, is arranged at a distance from the edges 6 of the ring rail 4.
  • the slot 5 is obtained in the galvanoplastic production of the jewelry ring 1 by the fact that a correspondingly annular predetermined breaking area is generated by an annular groove on the mandrel and subsequently separated, as can be seen in the development according to FIG. 2.
  • the cavity remains up to Core material can be removed through these openings.
  • the previously existing cavity 7 (FIG. 5) is filled to a solid section 8 (FIGS. 1, 3 and 5) with precious metal, so that the ring rail 4 there has the cross section shown in FIG. 6.
  • the jewelry ring 1 can be separated in the solid section 8 and either narrowed or expanded.
  • FIGS. 7, 10 and 13 show different embodiments of pieces of jewelry 1 in the form of bands, necklaces or the like, which have one or more movable connections 9.
  • the piece of jewelry 1 is designed in the manner of an armored chain, at one end of which a connecting member 10 is integrally cast and the other end of which has a matching connecting member 11 which, after being connected, allows movement between the two ends of the band.
  • the connecting member 10 is shown in more detail in FIGS. 8 and 9. Like the entire band, it has a wall thickness 12 and is designed as a hollow body, the inner boundary 13 of the cavity being able to be separated either on the basis of an even thinner wall thickness or on the basis of predetermined breaking lines.
  • the connecting member 10 has two legs 14 and a pin 15 connecting them, which are also hollow. A recess is in turn behind the pin 15. After the inner wall 13 has been removed, the cavity enclosed by the legs 14 and the pin 15 is accessible via openings 17. The cavity 16 can then be filled with solder through these openings, so that this area of the connecting member 10 is solid and can absorb the forces occurring between the two connecting members 10, 11, the connecting member 11 articulated around the pin 15 on the connecting member 10.
  • the both connecting members 18, 19 of the band-shaped piece of jewelry 1 in turn obtained in one piece with this by electroplating.
  • the connecting links 18, 19 are designed in the form of part links in the manner of chain links, as shown in FIG. 11 with reference to the connecting link 18.
  • the connecting member 18, like the band itself, has a thin wall 20.
  • the underside of the band is closed off by a possibly even thinner wall, which can be separated out via predetermined breaking lines 21.
  • the closed cavity 22 of the connecting member 18 is accessible from the inside and can be filled with solder.
  • a movable connecting member 9 is again provided on a band-shaped piece of jewelry 1.
  • the connecting member 9 is formed on the one hand by connecting members 23 at the ends, and on the other hand by a separate locking member 24.
  • the connecting members 23 have also been produced in one piece with the band-shaped piece of jewelry 1, and in the starting position they have approximately the shape shown in dashed lines in FIG. 15. After electroforming, they are filled with precious metal so that they are solid. After filling, the annular closure member 24 is pushed over and then the connecting members 23 are bent into the position shown in FIG. 15.
  • the thin-walled piece of jewelry obtained by electroforming can be subsequently worked on at the more stressed points.
  • Figure 16 shows a piece of jewelry 1 in the form of a pendant 24 with a ring eyelet 25 as a connecting member for the loop 26 of a chain or the like.
  • the trailer 24 again has a thin wall 27. This wall can be separated on the back, so that a kind of hollow relief is created.
  • this separation for example along the predetermined breaking line 28 indicated in FIG. 17 takes place, in the area 29 of the eyelet 25 there is an opening through which the cavity 30 of the ring eyelet is accessible so that the eyelet can be filled with solder.
  • FIG. 19 shows a piece of jewelry 1 in the form of an ear clip in a view of the back, the front 31 of which is indicated in FIG. 21.
  • a receptacle 32 is formed in one piece with the ear clip itself, which is used for mounting a clamping bracket 33 for attachment to the ear.
  • this receptacle 32 runs inward in an arc shape and is fork-shaped at its end (see FIG. 20).
  • a transverse bearing 37 is formed in each of the two fork legs 36, in which the opposite ends of the bracket 33 can be inserted resiliently.
  • the receptacle 32 is again hollow, the cavity 38 being accessible via an opening 39 and being able to be filled with solder.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Adornments (AREA)
EP85116448A 1985-03-19 1985-12-21 Procédé de fabrication de bijoux en métaux précieux et bijoux ainsi obtenus Withdrawn EP0195132A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3509791 1985-03-19
DE3509791 1985-03-19

Publications (2)

Publication Number Publication Date
EP0195132A2 true EP0195132A2 (fr) 1986-09-24
EP0195132A3 EP0195132A3 (fr) 1986-11-20

Family

ID=6265621

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85116448A Withdrawn EP0195132A3 (fr) 1985-03-19 1985-12-21 Procédé de fabrication de bijoux en métaux précieux et bijoux ainsi obtenus

Country Status (2)

Country Link
EP (1) EP0195132A3 (fr)
JP (1) JPS61220607A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3918920A1 (de) * 1989-06-09 1990-12-13 Eberle Josef Gmbh & Co Kg Galvanoplastisches verfahren zum herstellen von hohlen schmuck- und juwelierwaren
DE4434413C1 (de) * 1994-09-26 1996-03-21 Eberle Josef Gmbh & Co Kg Dünnwandiger Hohlkörper aus einem Edelmetall oder aus einer Edelmetallegierung zur Verwendung als Schmuck- oder Juwelierware

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1792542A (en) * 1928-06-21 1931-02-17 Arthur K Laukel Method of reenforcing hollow bodies formed by electrodeposition
US4195493A (en) * 1978-03-29 1980-04-01 Max Bogner Annular jewelry article

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3918920A1 (de) * 1989-06-09 1990-12-13 Eberle Josef Gmbh & Co Kg Galvanoplastisches verfahren zum herstellen von hohlen schmuck- und juwelierwaren
DE4434413C1 (de) * 1994-09-26 1996-03-21 Eberle Josef Gmbh & Co Kg Dünnwandiger Hohlkörper aus einem Edelmetall oder aus einer Edelmetallegierung zur Verwendung als Schmuck- oder Juwelierware
EP0702910A3 (fr) * 1994-09-26 1996-12-27 Eberle Josef Gmbh & Co Kg Corps creux à parois minces fait d'un métal ou d'un alliage précieux pour utilisation comme article de bijouterie

Also Published As

Publication number Publication date
EP0195132A3 (fr) 1986-11-20
JPS61220607A (ja) 1986-09-30

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