WO2013007684A2 - Method for producing a metal body made of at least two visually different metals - Google Patents

Method for producing a metal body made of at least two visually different metals Download PDF

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Publication number
WO2013007684A2
WO2013007684A2 PCT/EP2012/063389 EP2012063389W WO2013007684A2 WO 2013007684 A2 WO2013007684 A2 WO 2013007684A2 EP 2012063389 W EP2012063389 W EP 2012063389W WO 2013007684 A2 WO2013007684 A2 WO 2013007684A2
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WO
WIPO (PCT)
Prior art keywords
metal
slip
produced
metal body
drying
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Application number
PCT/EP2012/063389
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German (de)
French (fr)
Other versions
WO2013007684A3 (en
Inventor
Stefan Wolz
Original Assignee
Wdt-Wolz-Dental-Technik Gmbh
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Publication date
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Publication of WO2013007684A2 publication Critical patent/WO2013007684A2/en
Publication of WO2013007684A3 publication Critical patent/WO2013007684A3/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip

Definitions

  • the invention relates to the production of a metallic body, which consists of at least two optically different metals, in particular for the production of jewelry and watch parts.
  • WO 2011/023490 A1 describes a method for the production of dental parts from dental metal powder, in which a slip of metal powder is poured into a mold and a green compact is produced by simple drying, which is processed into a tooth part on CAD / CAM machines can, which then leads to a solid product by sintering taking into account the shrinkage. It is also mentioned in this document that noble metal alloys are suitable for this process.
  • Slip method for the production of metallic bodies consist of at least two optically dissimilar metals, whereby patterns can be generated that conventionally difficult or impossible to be generated.
  • metal also includes corresponding alloys.
  • Slip for the purposes of the present invention is a suspension of at least 80% by weight of metal powder and at most 20% by weight of water with a few excipients.
  • FIGS. 1 to 5 show different bodies which can be produced by the method according to the invention.
  • Figure 1 shows a metal body consisting of a base metal 1 (white gold), which is pearled by a second metal 2 (yellow gold) .
  • a slip of white gold is poured into a silicone rubber mold, the surface of a wavy structure having. On this surface, a slurry of yellow gold is applied. This procedure is repeated until the desired strength of the body is achieved.
  • the first possibility is to carry out a drying process after each casting process. This allows the production of precise interfaces. However, it may also be desirable for both metals to mix easily at the interfaces. In this case, only with pure slip without Intermediate drying worked. In both cases, then the final drying, which leads to a solid green body.
  • This green compact can already be processed mechanically to a desired shape, which is then sintered.
  • the alternative is that the green compact is sintered into a metallic block, which is processed in a conventional manner by machining. The grain of a metal body produced in this way is not possible with other methods.
  • Figure 2 shows a metal body in plan view, a tiger-fur like
  • FIG. 3 shows a further possibility of the method according to the invention.
  • finished parts 4 are placed with different color to the bottom surface either on a slip or greening surface.
  • embossed flowers, coats of arms or logos made of compatible precious metal are conceivable here.
  • These parts can, but do not have to, be poured in with another slurry layer because they combine with the base material during sintering without deformation.
  • Another possibility of the method according to the invention is the production of a marble structure in the metal body.
  • at least two slips of different colors are coarsely stirred, as the housewife does when baking marble cake. The mass thus produced is then dried to green body and then sintered to the metal body.
  • any desired patterns by milling into a green compact by means of a milling cutter a pattern which is e.g. is designed on a screen of a computer. These can be lettering or decorations.
  • the milled areas are then filled with the second, optically different slip. This method is possible on one side if the areas are only milled to a certain depth. When milling through the green body, the patterns are then visible on both sides. After the sintering process, we recommend one more
  • the recesses in the green body can also be produced by surrounding wax body with a slurry and, after the drying process, heating the green body to temperatures of up to 200 ° C. This leads to melting out of the wax, whereby corresponding cavities are achieved, which are filled with a different colored slip. After renewed drying, the known sintering takes place.
  • the process shown can be carried out not only with gold alloys, but also with platinum or silver-palladium.

Abstract

The invention relates to the production of a metal body, which is made of at least two different metals, in particular for producing jewelry pieces and watch pieces. According to the invention, at least a partial area of the metal body is produced by pouring a noble metal slip into a mold. The noble metal slip is molded into a solid green body by drying the noble metal slip. The material of the green body can be brought in contact with a second metal before or after the drying. The product produced in such a way is then sintered to form a solid metal body. The second metal can be present as a slip or in metal form. The method enables a large number of design possibilities in a simple manner. For example, grained or marbled metal bodies can be produced. Furthermore, the metal body, from which the jewelry pieces or watch pieces are produced, can be provided with surfaces patterned as desired. For example, a grain (2) of yellow gold can be added to a body (1) made of white gold.

Description

Verfahren zur Herstellung eines metallischen Körpers aus mindestens zwei optisch unterschiedlichen Metallen  Process for producing a metallic body from at least two optically different metals
Die Erfindung betrifft die Herstellung eines metallischen Körpers, der aus mindestens zwei optisch unterschiedlichen Metallen besteht, insbesondere zur Herstellung von Schmuck- und Uhrenteile. Stand der Technik The invention relates to the production of a metallic body, which consists of at least two optically different metals, in particular for the production of jewelry and watch parts. State of the art
Bei der Herstellung von Schmuckgegenständen aller Art ist es üblich aus ästhetischen Gründen beispielsweise Gelbgold und Weißgold in einem Teil zu kombinieren. Hierbei werden die einzelnen Teile getrennt gefertigt und üblicherweise verlötet. Besonders aufwendig ist diese Arbeit, wenn eine In the production of jewelry of all kinds, it is common for aesthetic reasons, for example, to combine yellow gold and white gold in one part. Here, the individual parts are made separately and usually soldered. Particularly laborious is this work, if one
Vielzahl kleiner Teile als Intarsien in ein größeres Teil eingelegt werden sollen.  Variety of small parts to be inserted as inlaid in a larger part.
In der WO 2011 /023490 A1 ist ein Verfahren zur Herstellung von Zahnteilen aus Dentalmetallpulver beschrieben, bei dem ein Schlicker aus Metallpulver in eine Form gegossen wird und durch einfaches Trocknen ein Grünling erzeugt wird, der auf CAD/CAM-Maschinen zu einem Zahnteil verarbeitet werden kann, das anschließend durch Sintern unter Berücksichtigung der Schrumpfung zu einem festen Produkt fuhrt. In dieser Schrift ist auch erwähnt, dass sich für dieses Verfahren Edelmetall-Legierungen eignen. WO 2011/023490 A1 describes a method for the production of dental parts from dental metal powder, in which a slip of metal powder is poured into a mold and a green compact is produced by simple drying, which is processed into a tooth part on CAD / CAM machines can, which then leads to a solid product by sintering taking into account the shrinkage. It is also mentioned in this document that noble metal alloys are suitable for this process.
Aufgabenstellung task
Es ist daher Aufgabe der im Anspruch 1 angegebenen Erfindung das It is therefore an object of the invention specified in claim 1
Schlickerverfahren zur Herstellung von metallischen Körpern einzusetzen, die aus mindestens zwei optisch unterschiedlichen Metallen bestehen, wobei Muster erzeugt werden können, die konventionell schwer oder gar nicht erzeugt werden können. Ausführungsbeispiele Slip method for the production of metallic bodies, the consist of at least two optically dissimilar metals, whereby patterns can be generated that conventionally difficult or impossible to be generated. embodiments
Zur Begriffsdefinition, was unter einzelne Begriffe im Sinne der vorliegenden Erfindung verstanden wird, ist folgendes ausgeführt: For the definition of terms, which is understood to mean individual terms within the meaning of the present invention, the following is stated:
Der Begriff Metall umfasst auch entsprechende Legierungen. The term metal also includes corresponding alloys.
Schlicker im Sinne der vorliegenden Erfindung ist eine Suspension aus mindestens 80 gew.- % Metallpulver und höchstens 20 gew.-% Wasser mit wenigen Hilfsstoffen. Slip for the purposes of the present invention is a suspension of at least 80% by weight of metal powder and at most 20% by weight of water with a few excipients.
fiin Grünling ist ein fester, noch nicht gesinterter Körper. In den Figuren 1 bis 5 sind unterschiedliche Körper gezeigt, die mit dem erfindungsgemäßen Verfahren hergestellt werden können. fiin greenling is a solid, not yet sintered body. FIGS. 1 to 5 show different bodies which can be produced by the method according to the invention.
Figur 1 zeigt einen Metallkörper, der aus einem Grundmetall 1 (Weißgold) besteht, das maserförmig von einem zweiten Metall 2 (Gelbgold) durchzogen ist.. Bei der Herstellung dieses Körpers wird in eine Silikongummiform ein Schlicker aus Weißgold eingegossen, dessen Oberfläche eine wellenförmige Struktur aufweist. Auf diese Oberfläche wird ein Schlicker aus Gelbgold aufgebracht. Dieses Verfahren wird so oft wiederholt, bis die gewünschte Stärke des Körpers erzeugt ist. Hierbei hat man zwei Möglichkeiten. Figure 1 shows a metal body consisting of a base metal 1 (white gold), which is pearled by a second metal 2 (yellow gold) .. In the manufacture of this body, a slip of white gold is poured into a silicone rubber mold, the surface of a wavy structure having. On this surface, a slurry of yellow gold is applied. This procedure is repeated until the desired strength of the body is achieved. Here you have two options.
Die erste Möglichkeit besteht darin, dass man nach jedem Gießvorgang eine Trocknung durchfuhrt. Das ermöglicht die Herstellung präziser Grenzflächen. Es kann aber auch erwünscht sein, dass beide Metalle sich an den Grenzflächen leicht vermischen. In diesem Fall wird nur mit reinem Schlicker ohne Zwischentrocknung gearbeitet. In beiden Fällen erfolgt dann die Endtrocknung, die zu einem festen Grünling führt. Dieser Grünling kann bereits mechanisch zu einer gewünschten Form bearbeitet werden, die anschließend gesintert wird. Die Alternative besteht darin, dass der Grünling zu einem metallischen Block gesintert wird, der in herkömmlicher Weise spanabhebend weiterverarbeitet wird. Die auf diese Weise hergestellte Maserung eines Metallkörpers ist mit anderen Verfahren nicht möglich. The first possibility is to carry out a drying process after each casting process. This allows the production of precise interfaces. However, it may also be desirable for both metals to mix easily at the interfaces. In this case, only with pure slip without Intermediate drying worked. In both cases, then the final drying, which leads to a solid green body. This green compact can already be processed mechanically to a desired shape, which is then sintered. The alternative is that the green compact is sintered into a metallic block, which is processed in a conventional manner by machining. The grain of a metal body produced in this way is not possible with other methods.
Figur 2 zeigt einen Metallkörper in Draufsicht, der eine tigerfellartige Figure 2 shows a metal body in plan view, a tiger-fur like
Oberfläche aufweist. Zur Herstellung dieser Struktur wird auf einem ebenen Grünling aus Weißgold mittels einer Pipette Gelbgoldschiicker in Form eines Tigermusters 3 aufgetragen. Nach Verfestigung des Tigermusters 3 durch Trocknung kann bereits die Sinterung erfolgen, was zu einem profilierten Muster in der Endausführung führt. Surface has. To prepare this structure, yellow gold schickers in the form of a tiger pattern 3 are applied to a flat green body of white gold by means of a pipette. After solidification of the tiger pattern 3 by drying, the sintering can already take place, which leads to a profiled pattern in the final version.
Falls jedoch eine glatte Oberfläche gewünscht wird, erfolgt der Auftrag einer weitern Schicht aus Weißgoldschlicker, die zunächst das Tigermuster bedeckt. Durch Abschleifen der Oberfläche des getrockneten Grünlings oder des gesinterten Metallkörpers kommt das Muster dann wieder zum Vorschein.  However, if a smooth surface is desired, the application of another layer of white gold slip, which initially covers the tiger pattern. By sanding the surface of the dried green body or the sintered metal body, the pattern then reappears.
Für den Fachmann ist es klar, dass so jedes gewünschte Dessin erzeugt werden kann. It will be clear to those skilled in the art that any desired design can be made.
Figur 3 zeigt eine weitere Möglichkeit des erfindungsgemäßen Verfahrens. Hierbei werden entweder auf eine Schlicker- oder Grünlingsoberfläche fertige Teile 4 mit unterschiedlicher Farbe zur Bodenfläche aufgelegt. Denkbar sind hier beispielsweise geprägte Blumen, Wappen oder Firmenzeichen aus kompatiblem Edelmetall. Diese Teile können, müssen aber nicht mit einer weiteren Schlickerschicht eingegossen werden, da sie sich beim Sintern ohne Verformung mit dem Grundmaterial verbinden. Eine weitere Möglichkeit des erfindungsgemäßen Verfahrens besteht in der Herstellung einer Marmorstruktur im Metallkörper. Hierbei werden mindestens zwei Schlicker unterschiedlicher Farben grob verrührt, wie es die Hausfrau beim Backen von Marmorkuchen macht. Die so hergestellte Masse wird dann zum Grünkörper getrocknet und anschließend zum Metallkörper gesintert. FIG. 3 shows a further possibility of the method according to the invention. In this case, finished parts 4 are placed with different color to the bottom surface either on a slip or greening surface. For example, embossed flowers, coats of arms or logos made of compatible precious metal are conceivable here. These parts can, but do not have to, be poured in with another slurry layer because they combine with the base material during sintering without deformation. Another possibility of the method according to the invention is the production of a marble structure in the metal body. Here, at least two slips of different colors are coarsely stirred, as the housewife does when baking marble cake. The mass thus produced is then dried to green body and then sintered to the metal body.
Anstelle eines zweiten Schlickers können auch feste Metallteile eingerührt werden. Instead of a second slip and solid metal parts can be stirred.
Schließlich ist es mit der Erfindung möglich, beliebige Muster zu erzeugen, indem in einen Grünling mittels einer Fräse ein Muster eingefräst wird, das z.B. auf einem Bildschirm eines Computers entworfen wird. Das können Schriftzüge oder Verzierungen sein. Die ausgefrästen Bereiche werden dann mit dem zweiten, optisch unterschiedlichen Schlicker ausgefüllt. Dieses Verfahren ist einseitig möglich, wenn die Bereiche nur bis zu einer gewissen Tiefe gefräst werden. Beim Durchfräsen durch den Grünling sind die Muster dann beidseitig sichtbar. Nach dem Sintervorgang empfiehlt sich dann noch eine Finally, with the invention it is possible to produce any desired patterns by milling into a green compact by means of a milling cutter a pattern which is e.g. is designed on a screen of a computer. These can be lettering or decorations. The milled areas are then filled with the second, optically different slip. This method is possible on one side if the areas are only milled to a certain depth. When milling through the green body, the patterns are then visible on both sides. After the sintering process, we recommend one more
Oberflächenbearbeitung durch Schleifen. Surface processing by grinding.
Die Ausnehmungen in dem Grünkörper können auch dadurch erzeugt werden, indem Wachskörper von einem Schlicker umgössen werden und nach dem Trockenvorgang der Grünkörper auf Temperaturen bis 200 °C erwärmt wird. Dies führt zum Ausschmelzen des Wachses, wodurch entsprechende Hohlräume erzielt werden, die mit einem andersfarbigen Schlicker gefüllt werden. Nach dem neuerlichen Trocknen erfolgt die bekannte Sinterung. Das aufgezeigte Verfahren ist nicht nur mit Goldlegierungen durchfhhrbar, sondern auch mit Platin oder Silber-Palladium.  The recesses in the green body can also be produced by surrounding wax body with a slurry and, after the drying process, heating the green body to temperatures of up to 200 ° C. This leads to melting out of the wax, whereby corresponding cavities are achieved, which are filled with a different colored slip. After renewed drying, the known sintering takes place. The process shown can be carried out not only with gold alloys, but also with platinum or silver-palladium.
Es eröffnet eine Vielzahl von Gestaltungsmöglichkeiten, die bei anderen Verfahren zur Herstellung von Schmuck oder Uhren nicht gegeben sind.  It opens up a variety of design options that are not given in other processes for the production of jewelry or watches.

Claims

Patentansprüche claims
1. Verfahren zur Herstellung eines metallischen Köipers, der aus mindestens zwei optisch unterschiedlichen Metallen besteht, insbesondere zur Herstellung von Schmuck- und Uhrenteile, 1. A process for producing a metallic body, which consists of at least two optically different metals, in particular for the production of jewelry and watch parts,
dadurch gekennzeichnet, dass characterized in that
mindestens ein Teilbereich des metallischen Körpers durch Eingießen eines Metallschiickers in eine Form erzeugt wird, der durch Trocknung zu einem festen Grünling geformt wird, der mit mindestens einem zweiten Metall in Verbindung gebracht wird, und das so hergestellte Produkt zu einem festem Metallkörper gesintert wird. at least a portion of the metallic body is formed by pouring a metal foil into a mold, which is formed by drying into a solid green body, which is associated with at least one second metal, and the product thus produced is sintered into a solid metal body.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass das zweite Metall oder weiteres Metall in fester Form vorliegt. 2. The method according to claim 1, characterized in that the second metal or further metal is in solid form.
3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass das zweite Metall als Grünling vorliegt. 3. The method according to claim 2, characterized in that the second metal is present as a green compact.
4. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass das zweite Metall als normales Metall vorliegt. 4. The method according to claim 1, characterized in that the second metal is present as a normal metal.
5. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass das zweite Metall als Schlicker vorliegt. 5. The method according to claim 1, characterized in that the second metal is present as a slip.
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass als Metalle Gelbgold, Weißgold, Platin oder Silberpalladium verwendet wird. 6. The method according to any one of claims 1 to 5, characterized in that is used as metals yellow gold, white gold, platinum or silver palladium.
PCT/EP2012/063389 2011-07-08 2012-07-09 Method for producing a metal body made of at least two visually different metals WO2013007684A2 (en)

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DE201110106950 DE102011106950A1 (en) 2011-07-08 2011-07-08 Process for producing a metallic body from at least two optically different metals
DE102011106950.3 2011-07-08

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WO2021078740A2 (en) 2019-10-21 2021-04-29 Wdt-Wolz-Dental-Technik Gmbh Method for producing a cold-casting mould, and use of a cold-casting mould for the production of moulded parts, in particular dentures

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CH719107A1 (en) * 2021-11-02 2023-05-15 Officine Panerai Ag Process for manufacturing a watch or jewelery component by sintering two metal powders.

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RU2532957C2 (en) * 2013-03-07 2014-11-20 Общество с ограниченной ответственностью "Часовой завод "НИКА" Clock having ornamental housing made of precious metal, ornamental housing and thin-wall ornamental cover made of precious metal for said clock and method of making clock from precious metal
WO2021078740A2 (en) 2019-10-21 2021-04-29 Wdt-Wolz-Dental-Technik Gmbh Method for producing a cold-casting mould, and use of a cold-casting mould for the production of moulded parts, in particular dentures
WO2021078742A1 (en) 2019-10-21 2021-04-29 Wdt-Wolz-Dental-Technik Gmbh Method for producing moulded parts, in particular dental moulded parts

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