EP2091375A1 - Produit en métal - Google Patents

Produit en métal

Info

Publication number
EP2091375A1
EP2091375A1 EP07816215A EP07816215A EP2091375A1 EP 2091375 A1 EP2091375 A1 EP 2091375A1 EP 07816215 A EP07816215 A EP 07816215A EP 07816215 A EP07816215 A EP 07816215A EP 2091375 A1 EP2091375 A1 EP 2091375A1
Authority
EP
European Patent Office
Prior art keywords
product
sections
framework
cross
grid
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Withdrawn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
EP07816215A
Other languages
German (de)
English (en)
Inventor
Andreas Altmann
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.)
Altmann Casting AG
Original Assignee
Altmann Casting AG
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 Altmann Casting AG filed Critical Altmann Casting AG
Priority to EP07816215A priority Critical patent/EP2091375A1/fr
Publication of EP2091375A1 publication Critical patent/EP2091375A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C17/00—Gems or the like
    • A44C17/04—Setting gems in jewellery; Setting-tools
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C25/00—Miscellaneous fancy ware for personal wear, e.g. pendants, crosses, crucifixes, charms
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C27/00—Making jewellery or other personal adornments

Definitions

  • the invention relates to a product made of metal, wherein the product is produced by means of a casting process. Furthermore, the invention relates to a method for producing such a product.
  • Metal products can be found in many places and in different designs. Many functional items of daily use such. As stands, pedestals, racks, key chains, letter-makers, candlesticks, fittings, toys, Tools etc. are made of metal. But also decorative objects such. As statues or jewelry such as brooches, pendants, finger rings, etc. are often made of metal.
  • the object of the invention is to provide a product belonging to the technical field mentioned above, which can be produced in relation to its size with little material and has a correspondingly low weight.
  • the metal product comprises a basic structure having a plurality of scaffolding sections connected to one another. Furthermore, it comprises a filling structure with a plurality of grid sections connected to one another to form a grid structure.
  • the basic structure defines a spatial basic shape of the product, and the filling structure at least partially fills a spatial area defined by the framework.
  • it would be conceivable to produce such products for example, by connecting the individual framework sections or grid sections by means of soldering or welding, but this is extremely complicated and may therefore not be possible at all, for example if the product has sub-millimeter structures. Apart from casting, most other processing methods are not suitable for this.
  • the product is therefore produced according to the invention by means of a casting process.
  • a product is not made of solid metal, but with the inventive basic structure of a plurality of interconnected with a scaffold framework sections, the appearance of the product can be defined with little effort and produced with correspondingly little material. Nevertheless, the framework-like structure of the basic structure gives the product a three-dimensional basic stability and a clearly defined external appearance, which can already be recognized from a distance.
  • the filling structure according to the invention with the grid sections connected to a grid structure in turn not only increases the rigidity, but also the load capacity and durability of the product, and this with very low material consumption and correspondingly low weight of the product. This is especially true when the grid sections form triangles, which is preferably the case. In this way, the stability of the product can be further increased despite limited material costs.
  • the three-dimensional appearance of the product is further underlined without having to continuously fill the outer or inner boundary surfaces or the spatial area of the product defined and demarcated by the framework. In this way, the weight and the required amount of material and thus the manufacturing cost compared to a correspondingly massive object comparable size can be reduced to a fraction each.
  • the framework sections and the grid sections are preferably elongated, d. H.
  • Their longitudinal extent is a multiple of their transverse extent and they have along their longitudinal extent in each case a constant cross-section.
  • the sections are, for example, rod-shaped, wherein they can not only be straight but can also have curvatures. For example, it may be elliptical or circular arc sections.
  • a product is advantageously designed such that a cross-sectional area of the framework sections is greater than a cross-sectional area of the grid sections. As a result, the basic structure of the product becomes more stable and can be emphasized a little more, the overall stability of the product is hardly affected by the somewhat filigree design of the filling structure.
  • the invention may in principle be products of any size, it is preferably comparatively small objects with a size in the range of a few millimeters to a few centimeters, in particular with a size less than eight centimeters.
  • the size of an object is considered to be the largest extent of the object in one of the three spatial directions. Are correspondingly fine in such Products, including scaffolding and lattice sections.
  • the framework sections therefore have a cross-sectional area of at most 0.7 mm 2 , preferably between 0.3 mm 2 and 0.7 mm 2, and the grid sections have a cross-sectional area greater than 0.25 mm 2 , preferably between 0.25 mm 2 and 0.5 mm 2 .
  • the shape of the cross-sectional areas of the framework and grid sections is basically irrelevant, but they are preferably circular or circular disk-shaped, since such forms can be better planned and implemented.
  • a product according to the invention can be produced from the most arbitrary metals such as iron, copper, aluminum, lead, etc.
  • the product is made of a noble metal such as silver, gold or platinum. Due to the comparatively high material costs of precious metals, the lower material requirement in the final price of the product is most noticeable.
  • Corresponding alloys which are suitable for casting such an article must have a comparatively high and long flowability so that such fine structures can also be poured off cleanly and without errors.
  • the alloys must be such that no cracks or solidification voids occur during the casting on cooling.
  • the product consists of several individual parts, which in turn have been produced by means of a casting process as described above.
  • the product is poured in one piece.
  • the configuration of the filling structure can be used to determine how much of the spatial area defined by the framework is to be filled in, ie how large the ratio of the volume of the grid sections to the volume of this spatial area should be.
  • This ratio is hereinafter also referred to as degree of filling. For example, if the grid sections are placed close to each other so that the grid is made up of many, is closely spaced grid sections, the above ratio is greater than when the grid sections are far apart and correspondingly fewer grid sections are present in the spatial area.
  • the degree of filling in a preferred embodiment of the product according to the invention is at most about 15%, ie. H. the filling structure fills the spatial area defined by the framework to a maximum of 15%. Particularly preferred is a degree of filling between about 1% and 9%.
  • a sprue (also referred to as a main sprue) is typically provided on the model to be molded, through which the liquid metal passes during the casting process into the plaster mold and is distributed in the plaster mold.
  • This channel typically has a relatively large cross section compared to the cross sections of the product itself, so that the metal can reach all areas of the plaster mold without excessive cooling and the plaster mold can be poured off with optimum results.
  • This runner which is typically connected to the product after cooling and forming of the product, is typically separated. Normally, the corresponding joints are reworked so that it is no longer possible to see from the end product where the sprue was originally connected to the product.
  • the pouring channel is not removed after casting, but forms a peripheral frame structure in addition to the filling structure and the basic structure.
  • the cross-sectional area of this frame structure is significantly greater than the cross-sectional areas of the framework and grid sections, and is preferably over 1 mm 2 .
  • This frame structure can be left as it is, or it can be provided with other elements. For example, it may be designed to carry one or more gems.
  • the inventive method for producing a metal product is defined by the features of claim 10. It includes the following steps
  • a) by means of a stereolithography process is made of a lichtaushärtendem plastic, in particular of a synthetic resin such.
  • a basic spatial form of the product is defined by a basic structure which is a plurality of interconnected to a scaffold
  • a spatial region of the product defined by the framework is at least partially filled with a filling structure which comprises a plurality of grid sections connected to one another to form a grid structure.
  • the product must first be designed. This is typically done with a CAD (Computer Aided Design) program. Thereafter, the correspondingly generated data is converted into a specific format, for example the STL format, which can be read and processed by a stereolithography machine. Based on these data, the model is then made using a stereolithography process of a light-curing plastic.
  • CAD Computer Aided Design
  • the plaster mold is made from the model as follows: the model is attached to a wax tree, this being done manually in particular, because this requires a lot of experience and skill. Next, the model including wax tree is embedded in plaster, dried the plaster mold, the wax tree in a steam bath and then burned out the plaster mold. The wax of the wax tree runs in the steam bath completely from the plaster mold and when burning out the plaster mold, which takes place in a rotary kiln for a period of about 16 hours, the resin is almost completely burned. Last remains, which may remain in the plaster mold, must be carefully removed, for example, with a suitably equipped suction, so that the plaster mold can be completely filled with the liquid metal and the product has no or as little flaws.
  • the plaster used for making the mold is known from the prior art and will not be explained in detail here. However, a fine-grained plaster should be used, so that even the finest structures are displayed correctly. So that the narrow cross-sections and very fine contours leak clean, ie optimally flows through the liquid metal and thus filled, the plaster mold is preferably poured at a temperature between 700 0 C and 750 0 C.
  • the plaster mold is typically not heated specifically for this, but the casting takes place with advantage directly after burning out of the plaster mold in the still hot from burning shape, as soon as it has reached the correct temperature. While, as previously mentioned, the sprue is typically removed after cooling of the cast-off plaster mold, in a preferred variant of the invention it is left on the product.
  • This frame structure gives the product even more stability and can at the same time serve to decorate the product. This effect can be further enhanced by providing this frame structure optionally with one or more gemstones.
  • the product can still be subjected to a surface treatment.
  • the products are still being polished.
  • Fig. 1 shows an inventive product of six cube-shaped subunits
  • Fig. 2 shows one of the cube-shaped subunits from which the product
  • Fig. 1 is constructed
  • Fig. 3 shows a further embodiment of a product according to the invention in the form of a cube
  • FIG. 4 shows a further embodiment of a product according to the invention in the form of a heart
  • Fig. 5 shows another embodiment of an inventive product in the form of a triangle
  • Fig. 6 shows a further embodiment of a product according to the invention in the form of a further, three-dimensional triangle, in which the sprue is formed as part of the product.
  • a cross 1 is shown. This is composed of six cube-shaped subunits 2. Such a cube-shaped subunit is shown in Fig. 2 in an enlarged illustration. Four of the subunits 2 are arranged in series and the other two are arranged on opposite sides of one of the two middle subunits 2, so that overall the cross 1 results. The subunits 2 are in this case lined up in such a way that two adjacent subunits 2 each have a common side surface.
  • the edges 3 of such a cube-shaped subunit 2 form the structures previously referred to as scaffolding sections. These have a circular disk-shaped cross-section with a cross-sectional area between 0.3 mm 2 and 0.7 mm 2 .
  • the room diagonals 4 of the cube with the edges 3 are the previously referred to as grid sections structure and also have a circular disk-shaped cross-section.
  • the cross-sectional area is smaller here, namely between 0.25 mm 2 and 0.5 mm 2 .
  • All edges 3 of each subunit 2 form the basic structure or the framework of and the spatial diagonals 4 in turn form the filling structure or the lattice structure of the cross 1.
  • the alloy AU 750/3157 Pd from Metalor comprises as main constituents 75% gold, 7% palladium and 10% silver.
  • the yellow gold alloy AU 750/152 S from Metalor with the main constituents 75% gold, 12.5% silver and 12.5% copper has also proved suitable.
  • the percentages for these alloys are each weight percentages. Again, it will be apparent to one skilled in the art that these percentages are not to be construed as immutable, but may be varied according to the particular requirements of the particular application, ie, the specific design of the product to be molded.
  • FIG. 3 shows a further exemplary embodiment of a product according to the invention, which has the shape of a cube 10.
  • the cube 10 comprises six side surfaces 1 1 each with rounded corners 12.
  • the edges of the side surfaces 1 1 and the arcuate corner portions 16 of the edges form the backbone, d. H.
  • the framework sections 13 of the cube 10 which define the outer shape of the product, here just the cubic shape of the cube 10.
  • the interior of the cube 10 and the side surfaces 1 1 are filled by the grid sections 14.
  • the grid sections 14 in this example form a regular, cubic grid and give the cube 10 a correspondingly stable structure.
  • each of the side surfaces 1 1 comprises at least one socket 15, which is designed to receive a gemstone, such as a diamond.
  • the number and arrangement of the sockets 15 on the side surfaces 1 1 corresponds to the number and arrangement of the eyes of a normal cube.
  • the individual sockets are in this case preferably in an intersection of the grid sections 14 in the side surfaces 1 1.
  • no such sockets or one or more such sockets may be provided at all in either one of the outer and inner surfaces of the product.
  • the volume of the cube 10 must first be determined. With a side length of the cube 10 of about 20 mm in length, the cube 10 encloses a volume of about 8000 mm 3 . Furthermore, the volume of the grid sections 14 must be determined. In the example shown, these have a cross-sectional area of 0.5 mm 2 on. From a side surface 1 1 of the cube 10 each lead nine grid sections 14 (ie without the grid sections 14, which lie in the side surfaces 1 1 itself) to the respective opposite side surface 1 1. In three pairs of opposing side surfaces 1 1 results in 27 grid sections fourteenth about 20 mm by 0.5 mm 2 . This results in a total volume of the grid sections 14 within the cube 10 of approximately 270 mm 3 . The degree of filling F is calculated therefrom by dividing the volume of the grid sections 14 by the volume of the cube 10:
  • the heart 20 comprises an upper, non-planar, heart-shaped framework section 23.1 and a lower, non-planar, heart-shaped framework section 23.2, which adjoin the heart peaks 21 as well as in the large bow areas 22 touch.
  • These arc regions 22 may, for example, also have sections which belong to both the upper and the lower frame section 23.1 and 23.2.
  • the two heart-shaped frame sections 23.1, 23.2 are designed such that they each define a heart-shaped, curved surface. These surfaces are filled by the (in this case heart-shaped) grid sections 24.1.
  • the individual heart-shaped grid sections 24.1 touch each other, so that a relatively high stability can be achieved.
  • One of these heart-shaped grid sections 24.1 is also completely filled and occupied by three gems 25.
  • the grid structure of the heart 20 also includes straight grid sections 24.2, which fill the space spanned by the two curved surfaces.
  • Fig. 5 shows a further embodiment of a product according to the invention.
  • This has the shape of a triangle 30. It again comprises an upper, triangular frame section 33.1 and a lower, triangular frame section 33.2, which define the triangular shape as such.
  • the filling structure in this example comprises a plurality of circular grid sections 34.1 connecting the lower to the upper device sections 33.1 and 33.2, a plurality of bar-shaped grid sections 34.2 which also serve as a connection between the two stand sections 33.1 and 33.2 and a plurality of bar-shaped ones Grid sections 34.3, which each fill the triangular areas defined by scaffolding sections 33.1, 33.2.
  • the triangle 30 has on one of its side surfaces further on a bracket 35, with which the triangle is fastened, for example, to a necklace.
  • Fig. 6 shows another, also triangular example of a product according to the invention.
  • the external shape of this product is also a triangle 40.
  • Triangle 40 in this case consists of a triangular, upper framework section 43.1, a triangular, middle framework section 43.2 and a triangular, lower one
  • Scaffolding section 43.3 is formed, each lying in parallel planes.
  • the upper and the lower frame section 43.1, 43.3 have the same shape and size, are the same orientation in space and the middle frame section 43.2 is slightly larger than the other two, but is also the same orientation and is located centrally between them.
  • Lattice structure of the triangle 40 includes a plurality of rod-shaped grid sections
  • the triangle comprises a frame 45, which is connected by means of pyramid-shaped connecting pieces 46 at several points with the central frame section 43.2.
  • the frame 45 has not been attached thereto after the manufacture of the core, but has been made simultaneously with the core and integral therewith.
  • the frame 45 is the sprue which serves in the casting process for the coarse distribution of the liquid metal within the mold and has a correspondingly larger cross-section than the framework sections 43.1, 43.2, 43.3 and the grid sections 44.
  • the connecting pieces 46 in turn are the so-called supply channels, through which when pouring the liquid metal from the sprue into the different sections of the core is passed. Both the The sprue and the supply channels are typically completely removed after cooling of the molded article, whereas this is not necessary in the invention. Depending on the application, the supply channels and the sprue are left as part of the product.
  • the frame 45 has a plurality of sockets 48, which are each occupied by a gemstone 49.
  • a bracket 47 is provided which serves to secure the triangle 40 to another object.
  • the cross-sectional areas of the framework and grid sections can be freely selected within the limits set forth above and optimized for the particular application of the products, so that both the physical stability of the products in the desired range and the external appearance of the products meets the respective requirements.
  • the stability of the products can be further influenced. If, for example, a high degree of stability is to be achieved with respect to compressive or tensile forces occurring perpendicularly to the main side surfaces, a cubic lattice structure appears advantageous. On the other hand, with compressive or tensile forces which do not attack perpendicularly to any of the major side surfaces of a product, a triangular-based lattice structure appears to be more suitable.
  • the invention allows the production of products made of metal, which have a low weight compared to similar products of comparable size and in which for their production comparatively little material is needed. Accordingly, the products have a low weight and are inexpensive to manufacture. However, despite their low material consumption, the products have relatively high physical stability and strength.
  • Fig. 3 may be formed as a stand or base, or they may also as shown in Figures 4, 5 and 6, as Decor objects may be formed, which are suitable for example as a necklace pendant, brooches, statues, finger rings, other jewelry or just to set up.
  • Decor objects may be formed, which are suitable for example as a necklace pendant, brooches, statues, finger rings, other jewelry or just to set up.
  • Many other designs such as racks, key chains, letter-makers, candle holders, fittings, tools, models of buildings, etc., but also z. B. Toys such as chess pieces, dominoes, toy models of automobiles, etc. are possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

La présente invention concerne un produit (1) en métal qui est fabriqué au moyen d'un procédé de coulée, pour lequel une forme externe du produit est délimitée par une structure de base qui est constituée d'une pluralité d'éléments d'ossature (3) reliés pour former une ossature. La zone occupée par le produit (1) dans l'espace et délimitée par l'ossature est elle aussi remplie par une structure de remplissage qui comprend une pluralité de segments de grille (4) reliés pour former une structure de grille.
EP07816215A 2006-11-03 2007-10-26 Produit en métal Withdrawn EP2091375A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07816215A EP2091375A1 (fr) 2006-11-03 2007-10-26 Produit en métal

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP06405466A EP1917877A1 (fr) 2006-11-03 2006-11-03 Produit métallique
EP07816215A EP2091375A1 (fr) 2006-11-03 2007-10-26 Produit en métal
PCT/CH2007/000532 WO2008052375A1 (fr) 2006-11-03 2007-10-26 Produit en métal

Publications (1)

Publication Number Publication Date
EP2091375A1 true EP2091375A1 (fr) 2009-08-26

Family

ID=37684372

Family Applications (2)

Application Number Title Priority Date Filing Date
EP06405466A Withdrawn EP1917877A1 (fr) 2006-11-03 2006-11-03 Produit métallique
EP07816215A Withdrawn EP2091375A1 (fr) 2006-11-03 2007-10-26 Produit en métal

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP06405466A Withdrawn EP1917877A1 (fr) 2006-11-03 2006-11-03 Produit métallique

Country Status (2)

Country Link
EP (2) EP1917877A1 (fr)
WO (1) WO2008052375A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4353479B1 (fr) * 2009-08-19 2026-03-11 Smith & Nephew, Inc. Structures d'implant poreux
CN106073078B (zh) * 2016-08-18 2017-07-28 蔡志坚 一种可双面刻字的挂件
CN106073077B (zh) * 2016-08-18 2017-08-25 蔡志坚 一种多部件组合挂件
CN106136496B (zh) * 2016-08-18 2017-10-17 蔡志坚 一种刻有文字的挂件
CN106063623B (zh) * 2016-08-18 2017-08-11 蔡志坚 一种多功能的刻字挂件

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Publication number Priority date Publication date Assignee Title
AT230655B (de) * 1961-01-04 1963-12-30 Swarovski & Co Band, bei dem auf einem flexiblen Träger Schmuckkörper aus Glas, Kunststoff od. dgl. oder Rückstrahlelemente in einem Abstand angeordnet sind sowie Verfahren und Vorrichtung für seine Herstellung
FR2164547A1 (en) * 1971-12-23 1973-08-03 Gay Freres Trinket moulds - reproduced by moulding for lost mould mfr of castings
US4283831A (en) * 1980-05-05 1981-08-18 Tempo G Method of manufacturing and interlocking jewelry with precise preforms
US5594989A (en) * 1995-04-04 1997-01-21 Aurafin Corporation Process for making jewelry utilizing a hard photopolymer
GB2302260A (en) * 1995-06-16 1997-01-15 Birmingham Mfg Jewellers Ltd Finger ring conveying message
JPH09121913A (ja) * 1995-11-06 1997-05-13 Mitsui:Kk インタ−ロック型身装品の成型方法
USRE37854E1 (en) * 1996-07-08 2002-09-24 Nili Jewelry, Corp. Invisible setting method for jewelry
AT5247U1 (de) * 2001-02-15 2002-05-27 Swarovski & Co Verfahren zur herstellung eines schmuckstückes
GB2380961A (en) * 2001-10-06 2003-04-23 Carl George Winn Method of manufacturing jewellery

Non-Patent Citations (1)

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Title
See references of WO2008052375A1 *

Also Published As

Publication number Publication date
EP1917877A1 (fr) 2008-05-07
WO2008052375A1 (fr) 2008-05-08

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