WO2017063857A1 - Monnaie destinée à la circulation et procédé de fabrication associé - Google Patents

Monnaie destinée à la circulation et procédé de fabrication associé Download PDF

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Publication number
WO2017063857A1
WO2017063857A1 PCT/EP2016/072861 EP2016072861W WO2017063857A1 WO 2017063857 A1 WO2017063857 A1 WO 2017063857A1 EP 2016072861 W EP2016072861 W EP 2016072861W WO 2017063857 A1 WO2017063857 A1 WO 2017063857A1
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WO
WIPO (PCT)
Prior art keywords
coin
course
base plate
thickness
motif
Prior art date
Application number
PCT/EP2016/072861
Other languages
German (de)
English (en)
Inventor
Gerd Wagner
Original Assignee
Reischauer 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 Reischauer Gmbh filed Critical Reischauer Gmbh
Publication of WO2017063857A1 publication Critical patent/WO2017063857A1/fr

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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
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • 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
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20—Direct sintering or melting
    • B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C21/00—Coins; Emergency money; Beer or gambling coins or tokens, or the like
    • 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
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F2005/005—Article surface comprising protrusions
    • 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
    • B22F3/12—Both compacting and sintering
    • B22F3/16—Both compacting and sintering in successive or repeated steps
    • 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
    • B22F3/225—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 by injection molding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the invention relates to a course coin and a method for producing the course coin.
  • Conventional currency or circulation coins used as legal tender currency have a base plate with two opposite flat sides and a motif formed on each of the flat sides. On the flat sides, an edge-surrounding edge bar is also formed, which surrounds the motif in each case.
  • the base plate is formed of at least one metallic component, wherein the metallic component is non-precious metal and composed of aluminum, aluminum alloys, iron, iron alloys and copper alloys having a copper content of at most 98 percent by weight.
  • the metals are melted in prescribed alloy and poured into blocks or bands. Thereafter, the metal blocks or strips are alternately rolled and annealed in the annealing furnace to eliminate the casting stress and to form plates of a predetermined thickness.
  • the recrystallization annealing serves to eliminate the hardness produced during rolling. From the plates thus treated flat blanks are punched out with preferably circular or regular polygonal cross-section. Before further processing, the blanks can be polished and optionally electroplated.
  • embossing of the course coins takes place in an embossing tool, in which a negative image of the design is engraved.
  • embossing the material of the blank flows to the formation of the design and, where appropriate, to the formation of an annular edge bar.
  • the edge bar is usually higher than the highest point of the design and is intended to protect it from wear.
  • the coin presses used for the production of course coins work with high cycle numbers, so that the expression of the motifs on the course coins a high pressing force must be spent. Due to the low ductility of the metal alloys used for the production of course coins compared to precious metals, the coin designs on the course coins are only indistinct and often leave a subdued impression. The height of the design over the base plate is often only a few hundredths to a few tenths of a millimeter.
  • a method for the production of metallic coins using powder metallurgy produced coin blanks is known from DE 26 33 323.
  • the powder metallurgical process steps are carried out with the aim to achieve a special material identification of the coin for the purpose of identification against counterfeiting.
  • it is proposed to produce an inhomogeneous distribution of the materials within the coin blank or to add a non-alloyable foreign substance.
  • DE 33 36 526 C1 also describes a method for the production of sintered Regerohlingen for coins and medals.
  • the powder metallurgically produced blanks are polished and then inserted into the die of a coin press and stamped in a conventional manner.
  • Powder metallurgical processes for the production of coins and medals have hitherto remained irrelevant in the industry.
  • the invention further relates to a method for producing the course coin according to claim 6.
  • the course coin according to the invention comprises a base plate with two opposite flat sides and a motif formed on each of the flat sides. On the flat sides, an edge-bordering edge bar is formed, which surrounds the motif.
  • the base plate is formed of at least one metallic component, wherein the metallic component is non-precious metal and composed of aluminum, aluminum alloys, iron, iron alloys and copper alloys having a copper content of at most 98 percent by weight.
  • the coin is characterized by the fact that the relative proportion of the volume of the base plate in the total volume of the price coin is at most 90% and / or the relative proportion of the thickness of the base plate at the maximum pattern thickness is less than 80%.
  • edge bar refers to the raised edge appearing on the flat sides of the course coin, and the circular bar has the shape of a circular ring.
  • Motif refers to all patterns visible on the flat sides of the course coin except for the edge bar. such as labels, numbers and pictorial representations. The fringe and the motif are collectively referred to as "relief”.
  • Maximum Motive Thickness means the extension of the price between each highest point on the subject on the opposite flat sides forming the front and back of the price
  • the “thickness of the base” is the distance between the sides, which is also the size of the coin between two embossing-free fields on the opposite flat sides of the course coin can be understood, in which no motif or edge bar is present.
  • the volume fraction of the base plate in the total volume of the price is on average about 94.5% and may vary between about 92 and 98%.
  • the thickness of the base plate varies in these coins in a range of about 81 to 91%.
  • the course coin according to the invention shows due to the relatively low volume fraction of the base plate and / or in relation to the thickness of the base plate high expansion of the subject better contour sharpness, which serve a user of the course coin at any time as an independent identifier and thus as Security feature against counterfeiting can be classified.
  • the course coin is also more attractive to the user due to the high-quality design.
  • the at least one metallic component of the base plate is formed by a powder metallurgy method or an additive manufacturing method
  • course coins can be easily formed with a thinner base plate and a consequent larger relief volume and at the same time a higher motif thickness.
  • coin metal can be saved.
  • the relief on the base plate by the application of powder metallurgy or layer by layer manufacturing processes can be produced with significantly lower energy consumption and better contour sharpness. This makes it possible to design even more complex motifs, which in turn increase the counterfeiting security and attractiveness of the price coin.
  • the base plate of the course coin according to the invention is preferably circular in plan view. However, it can also be formed in another, preferably regular shape, for example as a regular polygon or oval.
  • the motifs formed on the opposite flat sides of the course coin may be the same or different. As a freely selectable design feature, the motifs are not subject to any restrictions.
  • the circumferential bar formed on the edge of the flat sides surrounding the motifs is preferably higher than the highest elevation of the motif on the respective flat side.
  • the edge bar in plan view of the respective flat side has a width of at least 2 mm, preferably at least 3 mm. Particularly preferably, the width of the edge bar is in a range of 2 to 4 mm.
  • the diameter of the base plate is preferably from 15 to 30 mm. A broadening of the edge bar compared to conventional course coins represents another security feature that can not be obtained on the deformation of semi-finished product blanking.
  • the base plate may be formed from a single metallic component, which may be present as a homogeneous material or as a composite material.
  • metallic components that are formed from a plated and / or galvanically coated substrate.
  • Clad substrates are sheet materials having a metal core and metal layers laminated to the core and joined to the core, for example, by diffusion bonding.
  • course coins in which the base plate consists of two or more different metallic components, which are arranged in the form of a surrounded by one or more rings core. Also in this case, the metallic components can each be present as a homogeneous material or as a composite material.
  • course coins are available which contain one or more metallic components together with a plastic component, in particular a metal core, which is surrounded by an intermediate ring made of plastic and a metallic outer ring.
  • the material of which the at least one metallic component is composed may consist of a single metal or a single metal alloy.
  • the metallic component may also consist of a multi-phase material.
  • the material can be composed of different metals or metal alloys, which preferably have different magnetic properties.
  • a magnetic metal or metal alloy such as ferritic steel may be dispersed in a matrix of a paramagnetic or diamagnetic metal or a paramagnetic or diamagnetic metal alloy such as an austenitic steel.
  • suitable magnetic metals or metal alloys are austenitic-ferritic steels such as duplex steels and lean duplex steels; martensitic steels such as cobalt steel; Ferroalloys such as ferrosilicon, ferromanganese, ferrochrome, ferrotitanium and ferronickel; elementary ferrimagnetic metals such as iron; Hard magnetic steels such as cobalt steel, aluminum-nickel-cobalt alloys and copper-manganese-aluminum alloys.
  • paramagnetic or diamagnetic metals and metal alloys are austenitic chromium-nickel steels, copper-nickel alloys, aluminum, aluminum alloys and copper alloys.
  • the at least one metallic component of course coins is precious metal-free for reasons of cost. As precious metals gold, silver and the platinum metals are considered.
  • the at least one metallic component is composed of aluminum alloys, the aluminum content is preferably at least 60% by weight. Iron alloys are preferably used with an iron content of 60 percent by weight.
  • Metallic components of copper alloys preferably have a copper content of 50 to 98 weight percent. Metallic components made of fine copper 999/1000 are not the subject of the invention.
  • copper, iron and / or aluminum may be used among each other and at least one metal selected from the group consisting of nickel, zinc, tin, magnesium, manganese, cobalt, chromium and mixtures thereof and unavoidable impurities.
  • the relative proportion of the volume of the base plate in the total volume of the price is at most 85%. More preferably, the relative proportion of the volume of the base plate to the total volume of the price coin is in a range of 60% to 90%, preferably 65 to 85%.
  • the total volume of the price can be determined by displacement measurement or by means of a pycnometer.
  • the volume of the base plate can be calculated from their dimensions.
  • the difference between the total volume of the price coin and the volume of the base plate results in the relief volume, ie the sum of the volume of the marginal rod and the motif volume.
  • the proportion of the relief volume and the proportion of the volume of the base plate in the total volume of the price coin thus complement each other to 100%.
  • a relief volume fraction of at least 10%, based on the total volume of the price coin, can be achieved by broadening the edge bar and / or by reducing the thickness of the base plate in comparison to the subject height. Both measures lead to security features, which can not be realized with conventional course coins and which therefore can be easily identified by a user. These security features are particularly pronounced when the relief volume fraction is in a range of 15 to 40%.
  • the relative proportion of the thickness of the base plate at the maximum pattern thickness is less than 80%, preferably less than 75%, particularly preferably less than 70%.
  • the relative proportion of the thickness of the base plate at the maximum pattern thickness is in a range of 60 to less than 80%.
  • the motif thickness can be determined mechanically by means of a micrometer or a caliper or optically by a distance measurement by means of a laser device.
  • Coin coins with a thin base plate and, in contrast, a high motif are extremely contour sharp and therefore very attractive to a user. They can also be designed with much more complex motifs than previous course coins. Both the contour sharpness and the complexity of the design can easily be identified by the user as a security feature.
  • the course coin use is made of a powder metallurgical process or an additive manufacturing process. It is provided that at least one of the metallic components of the course coin is formed by the powder metallurgy process or additive manufacturing process.
  • Powder metallurgical processes for the production of coins and medals are known in principle. For the production of course coins, these methods have not been used.
  • a metal powder is used in provided the prescribed composition, pressed the metal powder into a green compact and the green compact sintered.
  • the metal powder may be a single metal or a single metal alloy, or a mixture of different metals and / or metal alloys.
  • the composition of the metal powder or powder mixture corresponds to the prescribed composition of the metallic component.
  • the metal powder is composed of several components, wherein at least one of the powder components is magnetic, in particular ferromagnetic or ferrimagnetic, and at least one other powder component is paramagnetic or diamagnetic.
  • the mass fraction of the at least one magnetic powder component may range from 2 to 40% by weight.
  • the proportion of the paramagnetic or diamagnetic powder component is preferably between 60 and 98 wt .-%, each based on the total weight of the metal powder. If the proportion of magnetic powder components is too high, there is a risk that the course coins will get stuck in a coin tester or slot machine.
  • ferritic steels especially iron-chromium alloys; austenitic-ferritic steels such as duplex steels and lean duplex steels; martensitic steels such as cobalt steel; Ferroalloys such as ferrosilicon, ferromanganese, ferrochrome, ferrotitanium and ferronickel; elementary ferrimagnetic metals such as iron; hard magnetic steels such as cobalt steel; Aluminum-nickel-cobalt alloys and copper-manganese-aluminum alloys.
  • paramagnetic or diamagnetic powder components are austenitic steels, in particular austenitic chromium-nickel steels, copper-nickel alloys, aluminum, aluminum alloys and copper alloys.
  • the pressing of the metal powder to a green compact can be done in particular by a metal injection molding process.
  • the production of the course coin in the metal injection molding process preferably comprises the following steps: a) providing a metal powder and mixing the metal powder with an organic binder to form a powder-binder mixture; b) injection molding the powder-binder mixture in a tool to form a green compact, wherein the green compact is provided in the tool with a profile corresponding to the relief of the course coin; c) removing the binder from the green compact by thermal treatment or chemical leaching to form a debindered green compact; and d) compacting the debinded green compact contained in step c) by sintering to a sintering density of at least 95% of the theoretical density to form the coin with coinage.
  • metal powder injection molding In the production of the course coin by means of metal powder injection molding already shows the green form the shape or the relief of the course coin. This can thus be used directly after sintering or refined by suitable post-treatments.
  • the metal powder injection molding is currently suitable for the production of course coins, which must be obtained in high quantities with consistent quality and small dimensional tolerances.
  • the metal powder injection molding can also be dispensed with the provision of stamped blanks and the subsequent embossing, so that a process step is eliminated. Sufficiently dense currency coins with high surface quality can be obtained.
  • the metal powders used for the metal powder injection molding may have a particle size of up to 40 ⁇ , preferably up to 20 ⁇ .
  • the grain size Preferably, the grain size of about 1 ⁇ to 20 ⁇ .
  • the strength of the debindered green compact can be influenced via the particle size distribution.
  • Suitable binders are thermoplastics such as polyolefins, in particular polyethylene and polypropylene, polyacrylates, polystyrene and polyoxymethylene (POM).
  • Other binders which can be used in admixture with the thermoplastics are waxes, paraffins, higher fatty acids and glycols such as alkylene glycol, in particular polyethylene glycol, as well as polysaccharides and cellulose derivatives such as cellulose acetate.
  • the metal powder-binder mixture is shaped by processing in an injection molding machine. For this purpose, the mixture is heated to the processing temperature of the organic binder and injected under pressure into a mold having a mold cavity, which is formed as a negative image of the course coin.
  • the result is a profiled green body, which already has the shape and relief of the later course coin.
  • the dimensions of the green compact may therefore be about 10 to 15% greater than the dimensions of the sintered price coin.
  • the green compact may be subjected to, for example, a heat treatment under inert gas atmosphere or under vacuum.
  • debinding may be accomplished by heating to a temperature in the range of about 150 to 750 ° C for 1 to 24 hours.
  • the binder can also be leached chemically from the green compact, for example by treatment with a gaseous or liquid solvent for the binder.
  • the sintering of the debindered green compact is carried out by known methods such as vacuum sintering, pressure sintering or sintering in combination with hot isostatic pressing.
  • the sintering temperature and the holding time in the sintering furnace depends on the metal powder to be sintered.
  • the sintering of the debindered green compact is carried out at atmospheric pressure under a protective gas atmosphere and a sintering temperature which is in the range of about 60 to 95% of the solidus temperature of the metal powder used.
  • the metal powder provided in a predetermined composition is pressed into a green compact and sintered to form a stamped blank.
  • the metal powder used for producing the sintered embossing blank preferably has a mean particle size of from 20 ⁇ m to 150 ⁇ m.
  • the pressing of the green compact from the metal powder is preferably carried out at a pressure of 200 MPa to 800 MPa, preferably 200 MPa to 600 MPa, preferably with the addition of a pressing aid.
  • the subsequent sintering of the green body is preferably carried out at atmospheric pressure under a protective gas atmosphere, preferably nitrogen.
  • the sintering temperature is preferably about 60 to 95% of the solidus temperature of the metal or metal alloy used.
  • the sintered density of the sintered embossing blank is preferably set to be at most 98% of the theoretical density, more preferably from 95 to 98% of the theoretical density.
  • the sintered blank blank can be provided as a flat disc or as a blank and provided with an edge-surrounding rib before the embossing process in an edge-forming machine.
  • the green compact can already be provided with a profile on its flat sides during the pressing of the metal powder.
  • the profile is preferably in the shape of a cone or truncated cone, a pyramid, a truncated pyramid, a dome, a spherical segment, a prism or a cylinder.
  • an edge-surrounding rib may be provided on at least one of the flat sides of the green compact.
  • the profile is preferably not higher than the edge-surrounding rib on the respective flat side, so that the embossing blank is stackable.
  • the sintered blank blank is submerged in a press
  • the motif and the edge bar of the embossing blank can be introduced into a tool that with two embossing dies, d. H. an upper punch and a lower punch, as well as a stamping ring is provided.
  • the dies By applying the dies to the sintered blank blank under pressure, the blank is formed into a coin.
  • the intended in the dies as negative relief pattern are transferred to form a positive impression of the relief on the embossing blank.
  • the high ductility of the sintered embossing blank contributes to a significant improvement in the flow behavior in comparison to blanks stamped out of semi-finished products of the same material.
  • the relief on the flat side of the course coin can therefore with much lower pressing force or less embossing passes at the same time much improved Contour sharpness can be generated.
  • the sintered cavity blank is provided with a profile, the material flow required for the forming process to form the relief can be further reduced. Due to the lower pressing forces, the time and energy required to coin the course coin is much lower.
  • the powder metallurgy production of the course coin can also be done with the required metal weight for the coin, so that no punching waste accumulate and valuable material is saved for the production of the embossing blanks.
  • the production of the course coin according to the invention can also be effected by additive manufacturing methods, in particular by selective laser sintering or 3D printing.
  • additive manufacturing methods in particular by selective laser sintering or 3D printing.
  • the metal powders are applied layer by layer to the base plate and selectively sintered by scanning with a laser beam to form the relief.
  • course coins can be obtained which have complex motifs with high contour sharpness and motif thickness. It is also possible to make a course coin completely through additive manufacturing.
  • a 3D model of the course coin is created and provided on a digital storage medium.
  • the invention is therefore also a digital storage medium with a readable 3D model of the course coin, the so with a programmable computer system with a Selective laser sintering machine can work together that the course coin is generated.
  • Figure 1 is a schematic representation of a course coin in plan view of a flat side; and - Figure 2 is a schematic representation of the coin of Figure 1 in cross section.
  • Figures 1 and 2 show a course coin 10 having a base plate 12 with two opposite flat sides 14, 14 '. On each of the flat sides 14, 14 ', an edge peripheral edge bar 16, 16' is formed, which appears as a raised in plan view of the flat sides 14, 14 ', circular ring. Each of the flat sides 14, 14 'is provided with a motif 18, 18'.
  • the currency coin 10 shown here consists of a single metallic component. But it is also possible to produce course coins with two or more metallic components, wherein at least one of the components is produced by a powder metallurgy process.
  • the metallic component is made of a metal powder consisting of iron, iron alloys, aluminum, aluminum alloys or copper alloys having a copper content of at most 98% by weight or mixtures thereof.
  • Preferred additives are nickel, zinc, tin, magnesium, manganese, cobalt and / or chromium and unavoidable impurities.
  • the diameter of the course coin 10 is denoted by D in FIGS. 1 and 2.
  • the width of the edge bar 16, 16 ' is indicated by "W.”
  • W width of the edge bar 16, 16'
  • the width of the edge bar 16, 16' is on both flat sides 14, 14 '. equal.
  • the edge bars 16, 16 'on the opposite flat sides 14, 14' of the course coin 10 may also have a different width W.
  • the thickness d G of the base plate 12 is the distance of the flat sides 14, 14 'from each other.
  • D M denotes the maximum motif thickness, which is defined as the extent of the price coin 10 between the respective highest points on the motif 18, 18 'on the opposite flat sides 14, 14'.
  • a sintered stamping blank made of stainless steel was embossed to form a relief on the front and back of the embossing blank.
  • the relative proportion of the relief volume in the total volume of the exchange rate 10 was 27%.
  • the thickness d G of the base plate 12 was about 76% of the maximum motif thickness d M -
  • the price had a diameter of about 24.6 mm.
  • the width of the edge bar was 3.7 mm.
  • the course coin 10 can be regarded as forgery-proof, since the proportion of the relief volume by the widened edge bar 16, 16 'is so high that the design of the course coin 10 can be distinguished at any time from conventional coins, where such a high relief volume fraction manufacturing technology with the for the production of course coins used materials can not be realized.
  • Embodiment 2
  • a sintered stainless steel embossing blank was embossed in a coin press to form a course coin 10 having a relief having a maximum subject thickness d M of 1.22 mm.
  • the thickness d G of the base plate 12 was 0.83 mm.
  • the relief volume fraction was about 8%.
  • a forgery-proof price coin 10 is obtained, since the base plate 12 is so thin relative to the maximum motif thickness d M that the design of the price coin 10 can be distinguished at any time from conventional course coins in which such a thickness distribution is produced using the materials used for course coins not possible.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Adornments (AREA)

Abstract

L'invention concerne un monnaie destinée à la circulation comportant une plaque de base dotée de deux faces planes opposées et d'un motif formé sur chacune des faces planes. Un listel périphérique de bord respectif est formé sur les faces planes, lequel entoure le motif. La plaque de base est formée à partir d'au moins un composant métallique, le composant métallique étant exempt de métaux précieux et étant composé d'aluminium, d'alliages d'aluminium, de fer, d'alliages de fer et d'alliages de cuivre présentant une teneur en cuivre d'au maximum 98 pour cent en poids. La monnaie destinée à la circulation est caractérisée en ce que la proportion relative du volume de la plaque de base par rapport au volume total de la monnaie destinée à la circulation vaut au maximum 90 % et/ou la proportion relative de l'épaisseur de la plaque de base par rapport à l'épaisseur maximale du motif vaut moins de 80 %. Pour la fabrication de la monnaie destinée à la circulation, des procédés de la métallurgie des poudres ou des procédés de fabrication additive sont utilisés.
PCT/EP2016/072861 2015-10-14 2016-09-26 Monnaie destinée à la circulation et procédé de fabrication associé WO2017063857A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015117459.6A DE102015117459A1 (de) 2015-10-14 2015-10-14 Kursmünze und Verfahren zu deren Herstellung
DE102015117459.6 2015-10-14

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WO2017063857A1 true WO2017063857A1 (fr) 2017-04-20

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WO2019164766A1 (fr) * 2018-02-20 2019-08-29 French Fredric James Système d'impression et procédé d'utilisation
EP3858184A1 (fr) * 2020-01-27 2021-08-04 B.H. Mayer's Kunstprägeanstalt GmbH Pièce ou médaille

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DE102019104562A1 (de) * 2019-02-22 2020-08-27 COINstitute GmbH Verfahren zur überprüfung einer münze, vorrichtung zur überprüfung einer münze und münze
RU2751498C1 (ru) * 2020-10-30 2021-07-14 Федеральное государственное унитарное предприятие "Центральный научно-исследовательский институт конструкционных материалов "Прометей" имени И.В. Горынина Национального исследовательского центра "Курчатовский институт" (НИЦ "Курчатовский институт" - ЦНИИ КМ "Прометей") Способ получения порошковых магнитотвердых сплавов на основе системы fe-cr-co

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GB633802A (en) * 1947-11-08 1949-12-30 Metal And Plastic Compacts Ltd Improvements in and relating to the manufacture of coins
US3937618A (en) * 1973-07-09 1976-02-10 Franklin Mint Corporation Method for producing bi-metal object and product thereof
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