EP0646338B1 - Hohlkörper aus einem Edelmetall oder aus einer Edelmetallegierung zur Verwendung als Schmuck- oder Juwelierware - Google Patents
Hohlkörper aus einem Edelmetall oder aus einer Edelmetallegierung zur Verwendung als Schmuck- oder Juwelierware Download PDFInfo
- Publication number
- EP0646338B1 EP0646338B1 EP94115512A EP94115512A EP0646338B1 EP 0646338 B1 EP0646338 B1 EP 0646338B1 EP 94115512 A EP94115512 A EP 94115512A EP 94115512 A EP94115512 A EP 94115512A EP 0646338 B1 EP0646338 B1 EP 0646338B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- core
- hollow body
- wall
- precious metal
- functional element
- 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.)
- Expired - Lifetime
Links
Images
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
- C25D1/02—Tubes; Rings; Hollow bodies
-
- 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 hollow body from a Precious metal or from a precious metal alloy for use as jewelry or jewelry.
- a Precious metal or from a precious metal alloy for use as jewelry or jewelry.
- Such jewelry are known from EP-A-0 195 132. you will be manufactured by a galvanoplastic process by the spatial contour of the piece of jewelry, electrically conductive or made electrically conductive Form core, the precious metal is electrolytically deposited and after reaching the desired layer thickness Mold core material on chemical or thermal Is removed from the hollow body. For this Process has also become the term "electroforming" naturalized.
- This procedure has the advantage of being hollow jewelry of almost any shape with thin walls, i.e. inexpensive with economical use of precious metals can be produced.
- this advantage is associated with the disadvantage that the jewelry have low mechanical stability, what especially in the area where towing eyes, connecting links or links, brochures, Lugs, hooks, fuses or the like on the hollow body are required by tensile or bending forces causes a deformation of the hollow body wall or the wall thickness due to abrasive or rubbing stress gradually worn away and thereby weakened further becomes.
- EP-A-0 195 132 the wall thickness of the hollow body in the particularly stressed areas by additional To increase the precious metal order, e.g.
- Mold core is a metallic functional part, e.g. part of a clasp, embed, which consists of the same precious metal material as the outer wall of the hollow body and in places emerges from the mold core material, so that the functional part with the electrolytic metal deposition connects the resulting outer wall of the hollow body.
- a functional part can act like a strut and thereby the hollow body in a certain Stabilize way without eliminating the disadvantage that the outer wall the hollow body is otherwise sensitive to mechanical damage remains.
- the present invention has for its object to show a way such as thin-walled jewelry in a simpler and cheaper way protected against damage and provided with functional parts can.
- Figures 1 and 2 show a clasp for jewelry.
- the clasp has a shape similar to one lengthwise halved banana with a flat bottom 1 and with a arching the floor 1, in cross section approximately semicircular wall 2, which in the drawn Example just for the sake of appearance looks like a cord Relief.
- an eyelet 3 At one end of the clasp there is an eyelet 3 on which e.g. a chain or a necklace can be attached, and on the opposite
- the guide part 5 and the eyelet 3 are through a web 7 connected and together form a functional part. It consists of the same material as the bottom 1 and the arched wall 2 of the clasp and can by a casting process getting produced.
- the functional part becomes a negative form of the clasp inserted and then the negative form with a pourable or sprayable material, especially with a low-melting plastic, poured out, so that you have a composite part made of plastic 6 and contains from the functional part.
- the negative form ensures that the Eyelet 3, the inner region of the guide part 5 and the Bottom of the functional part of the plastic 6 remain uncovered.
- the plastic by immersion in a chemical metallization bath made superficially conductive, then the composite part as a mandrel in an electrolytic metallization bath immersed.
- a wire through which Form core have a cathodic potential can.
- the mold core is in the electrolytic bath total, i.e. both on the plastic surface as well as on the areas not covered by the plastic of the functional part coated with precious metal.
- the desired layer thickness preferably no more than 60 ⁇ m
- the resulting hollow body removed from the electrolytic bath and rinsed. He's basically done with it.
- Plastic 6 remains in the hollow body, the outer wall of which Plastic and the functional part embedded in it is fully supported.
- the wall thickness of the hollow body is exaggerated in Figure 2 for the sake of illustration shown in thick.
Landscapes
- 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)
Description
- Der Schritt des Herauslösens des Formkernmaterials wird eingespart, ebenso der aus der WO 90/02828 bekannte Schritt des Bildens von Verstärkungsrippen.
- Der im Hohlkörper verbleibende Kern stabilisiert die Außenwand des Hohlkörpers vollflächig. Damit kann z.B. ausgeschlossen werden, daß ein auf diese Weise hergestelltes Schmuckstück, wenn es zu Boden fällt, eine Beule bekommt.
- Das Schmuckstück wiegt wegen des massiven Formkerns schwer in der Hand und macht deshalb einen wertvollen Eindruck.
- Der den hohlen Schmuckstücken bisweilen eigene, störende, blecherne Klang ist verschwunden.
- Die Erfindung eignet sich für Hohlkörper mit eingebauten metallischen Funktionsteilen, welche mit Vorteil in den Formkern eingefügt werden und darin verbleiben. Sie werden am besten beim Spritzgießen des Kerns aus thermoplastischem Kunststoff in diesen eingebettet, indem sie in die Negativform des Hohlkörpers eingelegt und diese Form dann mit dem Kernmaterial gefüllt wird, oder in dem sie in den thermoplastischen Kunststoff eingefügt werden.
- Figur 1
- zeigt eine Schließe in der Draufsicht, und
- Figur 2
- zeigt die Schließe im Längsschnitt längs der Linie II-II.
Claims (6)
- Dünnwandiger Hohlkörper, hergestellt nach dem Elektroforming-Verfahren aus einem Edelmetall oder aus einer Edelmetallegierung, zur Verwendung als Schmuck- oder Juwelierware, dadurch gekennzeichnet, daß im Hohlkörper zur dauerhaften Unterstützung der dünnen Außenwand (1, 2) ein Kern (6) aus einem spritzbaren thermoplastischen Kunststoff vorgesehen ist, in welchen ein Funktionsteil (3, 5, 7) eingefügt ist.
- Hohlkörper nach Anspruch 1, dadurch gekennzeichnet, daß der Kern (6) ein unmittelbar mit der Außenwand (1, 2) verbundenes metallisches Funktionsteil (3, 5, 7) enthält, welches aus demselben Werkstoff wie die Außenwand besteht.
- Verfahren zum Herstellen eines Hohlkörpers nach Anspruch 1, durchSpritzgießen des Kerns in einer Negativform des Hohlkörpers,Metallisieren des Kerns,Verstärken der Metallisierung durch elektrolytische Metallabscheidung,
dadurch gekennzeichnet, daß der Kern aus einem thermoplastischen Kunststoff gebildet und in diesen ein Funktionsteil der Schmuck- oder Juwelierware eingefügt wird. - Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß das Funktionsteil beim Spritzgießen des Kerns in diesen eingebettet wird.
- Verfahren nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß das Verstärken der Metallisierung bei Erreichen einer Schichtdicke von höchstens 75 µm, vorzugsweise höchstens 40 bis 60 µm, beendet wird.
- Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß das Funktionsteil (3, 5, 7) aus demselben Werkstoff wie die Außenwand des Hohlkörpers besteht und so eingebettet wird, daß es an wenigstens einer Stelle aus dem Kernmaterial heraustritt.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4333472 | 1993-10-02 | ||
DE4333472 | 1993-10-02 | ||
DE4339641A DE4339641A1 (de) | 1993-10-02 | 1993-11-20 | Hohlkörper aus einem Edelmetall oder aus einer Edelmetallegierung zur Verwendung als Schmuck- oder Juwelierware |
DE4339641 | 1993-11-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0646338A1 EP0646338A1 (de) | 1995-04-05 |
EP0646338B1 true EP0646338B1 (de) | 1999-04-07 |
Family
ID=25930082
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94115512A Expired - Lifetime EP0646338B1 (de) | 1993-10-02 | 1994-09-30 | Hohlkörper aus einem Edelmetall oder aus einer Edelmetallegierung zur Verwendung als Schmuck- oder Juwelierware |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0646338B1 (de) |
AT (1) | ATE178463T1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1851060B (zh) * | 2006-04-10 | 2011-05-04 | 南京航空航天大学 | 中空零件电铸成形中沟槽的填充方法 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2828420B1 (fr) * | 2001-08-10 | 2003-10-17 | Pascaline Roselyne Domi Reaute | Procede de fabrication d'objets decoratifs legers ou creux, en metal precieux ou non, reproduisant des pliages japonais pour la bijouterie ou autre |
GB2392605A (en) * | 2002-09-04 | 2004-03-10 | Carl Winn | Manufacturing jewellery |
ITVI20050097A1 (it) * | 2005-04-05 | 2006-10-06 | Worldgem Brands Gestao E Investimentos Lda | Procedimento per la costruzione di oggetti preziosi e prodotti cosi' ottenuti |
IT201800010756A1 (it) * | 2018-12-03 | 2020-06-03 | Salim Mouhadab | Processo di fabbricazione di oggetti ornamentali |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1771409A1 (de) * | 1968-05-20 | 1971-12-23 | Reinhold Krause | Verfahren zur Herstellung von Schmuckgegenstaenden |
US4343684A (en) * | 1980-12-19 | 1982-08-10 | Stanley Lechtzin | Method of electroforming and product |
IN174705B (de) * | 1988-09-09 | 1995-02-18 | Daya Ranjit Senanayake | |
DE3918920A1 (de) * | 1989-06-09 | 1990-12-13 | Eberle Josef Gmbh & Co Kg | Galvanoplastisches verfahren zum herstellen von hohlen schmuck- und juwelierwaren |
-
1994
- 1994-09-30 EP EP94115512A patent/EP0646338B1/de not_active Expired - Lifetime
- 1994-09-30 AT AT94115512T patent/ATE178463T1/de not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1851060B (zh) * | 2006-04-10 | 2011-05-04 | 南京航空航天大学 | 中空零件电铸成形中沟槽的填充方法 |
Also Published As
Publication number | Publication date |
---|---|
EP0646338A1 (de) | 1995-04-05 |
ATE178463T1 (de) | 1999-04-15 |
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