EP1227908B1 - Method for producing metallic reticular structures - Google Patents
Method for producing metallic reticular structures Download PDFInfo
- Publication number
- EP1227908B1 EP1227908B1 EP00958218A EP00958218A EP1227908B1 EP 1227908 B1 EP1227908 B1 EP 1227908B1 EP 00958218 A EP00958218 A EP 00958218A EP 00958218 A EP00958218 A EP 00958218A EP 1227908 B1 EP1227908 B1 EP 1227908B1
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- EP
- European Patent Office
- Prior art keywords
- refractory material
- production
- container
- foam
- foam pre
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 29
- 239000006260 foam Substances 0.000 claims abstract description 27
- 239000011819 refractory material Substances 0.000 claims abstract description 21
- 229920001247 Reticulated foam Polymers 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims abstract description 3
- 229910052751 metal Inorganic materials 0.000 claims description 23
- 239000002184 metal Substances 0.000 claims description 23
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000007788 roughening Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 8
- 238000007711 solidification Methods 0.000 abstract description 6
- 230000008023 solidification Effects 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 12
- 238000005266 casting Methods 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 7
- 238000000465 moulding Methods 0.000 description 7
- 229920005830 Polyurethane Foam Polymers 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000011496 polyurethane foam Substances 0.000 description 3
- 239000002243 precursor Substances 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910001092 metal group alloy Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000009750 centrifugal casting Methods 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D25/00—Special casting characterised by the nature of the product
- B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/14—Casting in, on, or around objects which form part of the product the objects being filamentary or particulate in form
Definitions
- the invention relates to a process for the preparation of metallic grid structures.
- Reticular structures of metal and other materials have a broad Field of use.
- these structures can be used as components low weight, accumulator plates, electrochemical anodes and cathodes, Filters for fluids, separators for fluid media, heat shields and used for numerous other applications.
- U.S. Patent 3,616,841 which is considered to be the closest prior art discloses a process for producing an insoluble foam material with a predetermined reticulated structure.
- This method comprises the Production of a self-supporting reticulated polyurethane foam; the production a refractory mass by the cavities of the polyurethane foam be filled with a watery gypsum suspension and this Sus pension binds; heating the refractory mass to a temperature of about 120 ° C (250 ° F) over a period of two hours; the generating of cavities in the refractory molding compound by the temperature of the refractory Molding compound to 535 to 815 ° C (1000 to 1500 ° F) is increased to volatilize the entire foam; the introduction of a molten one Substance consisting of metals, metal alloys, ceramics or cermet, in the refractory molding compound, wherein the amount of the substance is sufficient to fill the cavities previously occupied by the reticulated structure were; and
- the melting of the substance introduced into the refractory molding compound is required, especially in refractory metals a large apparatus Effort or is technologically impossible to realize.
- the structure The foam is made by attaching the foams to the wax plates certainly.
- the foam structure determines the technical parameters of the final product, so that the statistical fluctuation range be as low as possible in order to ensure the achievement of the technical parameters of the final product.
- it is necessary to have the branched cavities of refractory molding compound to fill with a molten metal the molding material to warm up to temperatures above the melting temperature of the used substance lie. This causes the metal only very slowly solidifies, whereby the solidified metal receives a coarse-grained microstructure, which requires a lower strength.
- US 3,616,841 proposes various cooling methods such as spraying with water or air.
- the cooling effect is significantly attenuated because the molding material hinders the heat flow.
- the production of solid metal areas together with the grid structure is associated with the problem of very slow cooling.
- the specified process steps allow a controlled solidification of the metal in order to obtain a void-free and fine-grained microstructure, hardly or not too.
- the slow solidification of the Metal to long process times, the automated production also conflict.
- step (1) the modification of the surface of the Connect foam substructure. This is preferably done by roughening or structuring the surface of the foam precursor.
- the filling of the Molten metal in the heat-resistant container can by means of Pressure support or vacuum support done.
- Step (8) may purify the obtained grid structure and optionally modified by coating the grid structure, for example becomes.
- the method according to the invention offers several advantages.
- An adhesion of the Foam pre-structure with the sprue system and the sprue is not more necessary. This reduces the material and time consumption during production the mold significantly lowered. Furthermore, eliminates the source of error with connected to the uncontrollable bonding process, since large areas of Foam pre-structure have no connection to the sprue system. It will only the amount of refractory material needed to make the grid structure manufacture.
- the foam pre-structure protrudes after removal the mold container from the refractory molding compound out. This can be easily check if all of them disappear after the foaming preform volatilizes Bars and cells have a sufficiently good connection to the outside, to a ensure complete casting.
- the refractory shape can be heated up without delay and that the free access to the Bars and cells of the foam pre-structure accelerated volatilization the foam pre-structure allows. After the volatilization can also It is very easy to check if there are enough bars to access the molten metal to the internal structure, the "negative form" maintained. Since that refractory material is preheated before it is placed in the refractory container is, solidifies the molten metal from the outside, that is, held by the colder Container wall, inside. Through a targeted temperature control the container and the refractory material can be a void-free solidification the molten metal can be made possible.
- the refractory container has at least one opening for pouring the Molten metal in the refractory material.
- the interior is the container larger than the refractory, preheated material.
- This wall is in direct contact with the container wall, so that the solidification heat can be removed from the casting metal directly into the container wall and a fine-grained cast structure is formed.
- an optimal connection is created the webs of the grid structure to the massive wall.
- the process of the invention using the refractory Container obtained grid structures can be integrated into castings, with various casting methods such as die casting, chill casting, Centrifugal casting, low pressure casting or counter-pressure casting are produced can. Also, the grid structures themselves can by means of these methods to be poured.
- the method enables the production of lattice structures of various kinds Fineness in terms of bar strengths and cell sizes. Also combinations Different cell sizes and thicknesses in a body are possible.
- the process can be carried out continuously, as in the procedures
- the prior art required wax plates for bonding the Foam Vortechnik is omitted.
- the method is therefore an automated production of grid structures allows.
- any material can be used which has a sufficient Number of pores.
- this material is polyurethane foam.
- gypsum is preferably used.
- the Metal melt consists of metals, metal alloys, ceramics or metal ceramics. However, any castable material can be used.
- the metallic grid structures obtained by the invention can For example, as catalysts, for EMC shielding and used in batteries become. For example, for the preparation of a catalyst for Combustion stabilization of diesel fuel a Zn / Cu alloy as molten metal used, with which the refractory material is filled. In batteries For example, grid structures obtained by the invention can be used made of aluminum, and the following Step (8) be coated with lead.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
- Catalysts (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Cell Electrode Carriers And Collectors (AREA)
- Filtering Materials (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung von metallischen Gitternetzstrukturen.The invention relates to a process for the preparation of metallic grid structures.
Retikuläre Strukturen aus Metall und anderen Materialien besitzen ein breites Anwendungsgebiet. Beispielsweise können diese Strukturen als Bauteile mit niedrigem Gewicht, Akkumulatorenplatten, elektrochemische Anoden und Kathoden, Filter für Fluide, Trennvorrichtungen für fluide Medien, Hitzeschilde und für zahlreiche weitere Anwendungen verwendet werden.Reticular structures of metal and other materials have a broad Field of use. For example, these structures can be used as components low weight, accumulator plates, electrochemical anodes and cathodes, Filters for fluids, separators for fluid media, heat shields and used for numerous other applications.
Zur Herstellung derartiger Strukturen sind zahlreiche Verfahren bekannt, wobei jedoch im allgemeinen eine automatisierte Fertigung nur schwer möglich ist. Ursache hierfür ist, daß bei diesem Verfahren die retikulierten Schaum-körper mit Wachsplatten verklebt werden müssen. Es ist nicht oder nur schwer möglich, die Klebestellen automatisiert zu fertigen. Die Klebestellen sind jedoch unverzichtbar, da durch diese einerseits das Ausbrennen des Schaum-Vorkörpers erfolgt und andererseits durch die so entstehenden Verbindungsstellen die Schmelze in die Hohlräume des Schaum-Vorkörpers einfließt.For the production of such structures, numerous methods are known, wherein However, in general, an automated production is difficult. The reason for this is that in this process, the reticulated foam body must be glued with wax plates. It is not possible or difficult automated manufacturing of the splices. However, the splices are indispensable because of this on the one hand, the burning out of the foam pre-body takes place and on the other hand by the resulting joints the Melt flows into the cavities of the foam pre-body.
US-Patent 3.616.841, das als nächstliegender Stand der Technik betrachtet wird, offenbart ein Verfahren zur Herstellung eines unlöslichen Schaummaterials mit einer vorbestimmten retikulierten Struktur. Dieses Verfahren umfaßt die Herstellung eines selbsttragenden retikulierten Polyurethanschaums; die Herstellung einer feuerfesten Masse, indem die Hohlräume des Polyurethanschaums mit einer wässerigen Gipssuspension gefüllt werden und diese Sus pension abbindet; das Erhitzen der feuerfesten Masse auf eine Temperatur von etwa 120 °C (250 °F) über einen Zeitraum von zwei Stunden; das Erzeugen von Hohlräumen in der feuerfesten Formmasse, indem die Temperatur der feuerfesten Formmasse auf 535 bis 815 °C (1000 bis 1500 °F) erhöht wird, um den gesamten Schaum zu verflüchtigen; das Einbringen einer geschmolzenen Substanz, die aus Metallen, Metallegierungen, Keramiken oder Cermet besteht, in die feuerfeste Formasse, wobei die Menge der Substanz ausreicht, um die Hohlräume zu füllen, die zuvor von der retikulierten Struktur eingenommen wurden; und das Verfestigen der geschmolzenen Substanz, in dem die Temperatur so verringert wird, daß sie unter dem Schmelzpunkt der Substanz liegt; und das Auswaschen des Materials, das die feuerfeste Formmasse bildet. Dieses Verfahren weist mehrere Nachteile auf.U.S. Patent 3,616,841, which is considered to be the closest prior art discloses a process for producing an insoluble foam material with a predetermined reticulated structure. This method comprises the Production of a self-supporting reticulated polyurethane foam; the production a refractory mass by the cavities of the polyurethane foam be filled with a watery gypsum suspension and this Sus pension binds; heating the refractory mass to a temperature of about 120 ° C (250 ° F) over a period of two hours; the generating of cavities in the refractory molding compound by the temperature of the refractory Molding compound to 535 to 815 ° C (1000 to 1500 ° F) is increased to volatilize the entire foam; the introduction of a molten one Substance consisting of metals, metal alloys, ceramics or cermet, in the refractory molding compound, wherein the amount of the substance is sufficient to fill the cavities previously occupied by the reticulated structure were; and solidifying the molten substance in which the temperature is reduced so that it is below the melting point of the substance; and washing out the material forming the refractory molding compound. This Method has several disadvantages.
Das Schmelzen der Substanz, die in die feuerfeste Formmasse eingebracht wird, erfordert insbesondere bei hochschmelzenden Metallen einen großen apparativen Aufwand oder ist technologisch gar nicht zu realisieren. Die Struktur des Schaumes wird durch die Anbindung der Schäume an die Wachsplatten bestimmt. Die Schaumstruktur bestimmt die technischen Parameter des Endproduktes, so daß die statistische Schwankungsbreite möglichst gering sein muß, um das Erreichen der technischen Parameter des Endproduktes zu gewährleisten. Überdies ist es notwendig, um die verzweigten Hohlräume der feuerfesten Formmasse mit einem geschmolzenen Metall zu füllen, die Formmasse auf Temperaturen zu erwärmen, die über der Schmelztemperatur der verwendeten Substanz liegen. Das führt dazu, daß das Metall nur sehr langsam erstarrt, wodurch das erstarrte Metall eine grobkörnige Gefügestruktur erhält, die eine geringere Festigkeit bedingt.The melting of the substance introduced into the refractory molding compound is required, especially in refractory metals a large apparatus Effort or is technologically impossible to realize. The structure The foam is made by attaching the foams to the wax plates certainly. The foam structure determines the technical parameters of the final product, so that the statistical fluctuation range be as low as possible in order to ensure the achievement of the technical parameters of the final product. Moreover, it is necessary to have the branched cavities of refractory molding compound to fill with a molten metal, the molding material to warm up to temperatures above the melting temperature of the used substance lie. This causes the metal only very slowly solidifies, whereby the solidified metal receives a coarse-grained microstructure, which requires a lower strength.
Zur Lösung dieses Problems schlägt US 3.616.841 verschiedene Kühlmethoden wie beispielsweise Besprühen mit Wasser oder Luft vor. Der Kühleffekt wird jedoch erheblich abgeschwächt, da die Formmasse den Wärmefluß behindert. Auch die Herstellung massiver Metallbereiche gemeinsam mit der Gitternetzstruktur ist mit dem Problem der sehr langsam erfolgenden Abkühlung verbunden. Die angegebenen Verfahrensschritte lassen eine gelenkte Erstarrung des Metalls, um eine lunkerfreie und feinkörnige Gefügestruktur zu erhalten, kaum bzw. nicht zu. Überdies führt die langsam verlaufende Erstarrung des Metalls zu langen Prozeßzeiten, die einer automatisierten Fertigung ebenfalls entgegenstehen.To solve this problem, US 3,616,841 proposes various cooling methods such as spraying with water or air. The cooling effect However, it is significantly attenuated because the molding material hinders the heat flow. Also, the production of solid metal areas together with the grid structure is associated with the problem of very slow cooling. The specified process steps allow a controlled solidification of the metal in order to obtain a void-free and fine-grained microstructure, hardly or not too. Moreover, the slow solidification of the Metal to long process times, the automated production also conflict.
Es ist daher Ziel der vorliegenden Erfindung, die Herstellung von Gittemetzstrukturen so zu vereinfachen, daß eine automatisierte Fertigung derartiger Strukturen möglich ist. Dabei steht die Aufgabe, ein Verfahren zu finden, das die Herstellung von Gittemetzstrukturen mit großen Abmessungen in großen Stückzahlen erlaubt.It is therefore an object of the present invention to produce gauze structures to simplify so that an automated production of such Structures is possible. The task is to find a method that the production of mesh structures with large dimensions in large Quantities allowed.
Erfindungsgemäß wird dies durch ein Verfahren erreicht, das folgende Schritte
umfaßt:
Vorteilhafte Merkmale des erfindungsgemäßen Verfahrens finden sich in den abhängigen Ansprüchen. Advantageous features of the method according to the invention can be found in the dependent claims.
Zusätzlich kann sich an Schritt (1) die Modifizierung der Oberfläche der Schaum-Vorstruktur anschließen. Vorzugsweise erfolgt dies durch Aufrauhen oder Strukturieren der Oberfläche der Schaum-Vorstruktur. Das Einfüllen der Metallschmelze in den hitzebeständigen Behälter (Schritt (7)) kann mittels Druckunterstützung oder Vakuumunterstützung erfolgen. Im Anschluß an Schritt (8) kann die erhaltene Gitternetzstruktur gereinigt und gegebenenfalls modifiziert werden, in dem die Gitternetzstruktur beispielsweise beschichtet wird.In addition, at step (1), the modification of the surface of the Connect foam substructure. This is preferably done by roughening or structuring the surface of the foam precursor. The filling of the Molten metal in the heat-resistant container (step (7)) can by means of Pressure support or vacuum support done. In connection to Step (8) may purify the obtained grid structure and optionally modified by coating the grid structure, for example becomes.
Das erfindungsgemäße Verfahren bietet mehrere Vorteile. Eine Verklebung der Schaum-Vorstruktur mit dem Eingußsystem und dem Eingußtrichter ist nicht mehr nötig. Dadurch wird der Material- und Zeitverbrauch bei der-Herstellung der Gußform deutlich gesenkt. Des weiteren entfällt die Fehlerquelle, die mit dem unkontrollierbaren Klebevorgang verbunden ist, da große Bereiche der Schaum-Vorstruktur keine Anbindung zum Eingußsystem haben. Es wird nur die Menge an feuerfesten Material benötigt, die erforderlich ist, um die Gitternetzstruktur herzustellen. Die Schaum-Vorstruktur ragt nach der Entnahme aus dem Formbehälter aus der feuerfesten Formmasse heraus. Hierdurch läßt sich leicht kontrollieren, ob nach dem Verflüchtigen des Schaum-Vorkörpers alle Stege und Zellen eine hinreichend gute Anbindung nach außen haben, um einen vollständigen Abguß zu gewährleisten. Überdies bietet die Zugänglichkeit der Schaum-Vorstrukur von allen Seiten den Vorteil, daß die feuerfeste Form verzögerungsfrei aufgeheizt werden kann und daß der freie Zugang zu den Stegen und Zellen der Schaum-Vorstruktur eine beschleunigte Verflüchtigung der Schaum-Vorstruktur ermöglicht. Nach der Verflüchtigung kann ebenfalls sehr leicht kontrolliert werden, ob genügend Stege den Zugang der Metallschmelze zu der inneren Struktur, der "Negativform", aufrechterhalten. Da das feuerfeste Material vorgewärmt ist, bevor es in den feuerfesten Behälter eingelegt wird, erstarrt die Metallschmelze von außen, das heißt von der kälter gehaltenen Behälterwand, nach innen. Durch eine gezielte Temperaturführung des Behälters und des feuerfesten Materials kann eine lunkerfreie Erstarrung der Metallschmelze ermöglicht werden. The method according to the invention offers several advantages. An adhesion of the Foam pre-structure with the sprue system and the sprue is not more necessary. This reduces the material and time consumption during production the mold significantly lowered. Furthermore, eliminates the source of error with connected to the uncontrollable bonding process, since large areas of Foam pre-structure have no connection to the sprue system. It will only the amount of refractory material needed to make the grid structure manufacture. The foam pre-structure protrudes after removal the mold container from the refractory molding compound out. This can be easily check if all of them disappear after the foaming preform volatilizes Bars and cells have a sufficiently good connection to the outside, to a ensure complete casting. Moreover, it provides accessibility the foam Vorstrukur from all sides the advantage that the refractory shape can be heated up without delay and that the free access to the Bars and cells of the foam pre-structure accelerated volatilization the foam pre-structure allows. After the volatilization can also It is very easy to check if there are enough bars to access the molten metal to the internal structure, the "negative form" maintained. Since that refractory material is preheated before it is placed in the refractory container is, solidifies the molten metal from the outside, that is, held by the colder Container wall, inside. Through a targeted temperature control the container and the refractory material can be a void-free solidification the molten metal can be made possible.
Der feuerfeste Behälter weist mindestens eine Öffnung zum Eingießen der Metallschmelze in das feuerfeste Material auf. Vorzugsweise ist der Innenraum des Behälters größer als das feuerfeste, vorgewärmte Material. Zwischen der Behälterwand und dem Körper aus feuerfestem Material entsteht auf diese Weise ein frei wählbarer Zwischenraum, so daß eine beliebig geformte, massive Wandung an die Gitternetzstruktur angegossen werden kann. Diese Wandung steht in direktem Kontakt mit der Behälterwand, so daß die Erstarrungswärme aus dem Gießmetall direkt in die Behälterwand abgeführt werden kann und ein feinkörniges Gußgefüge entsteht. Überdies entsteht eine optimale Anbindung der Stege der Gitternetzstruktur an die massive Wandung.The refractory container has at least one opening for pouring the Molten metal in the refractory material. Preferably, the interior is the container larger than the refractory, preheated material. Between the Container wall and the body of refractory material is formed on this Make a freely selectable gap, so that an arbitrarily shaped, massive Wall can be poured onto the grid structure. This wall is in direct contact with the container wall, so that the solidification heat can be removed from the casting metal directly into the container wall and a fine-grained cast structure is formed. Moreover, an optimal connection is created the webs of the grid structure to the massive wall.
Die durch das erfindungsgemäße Verfahren unter Verwendung des feuerfesten Behälters erhaltenen Gitternetzstrukturen können in Gußteile integriert werden, die mit verschiedenen Gießverfahren wie beispielsweise Druckguß, Kokillenguß, Schleuderguß, Niederdruckguß oder Gegendruckguß hergestellt werden können. Auch die Gitternetzstrukturen selbst können mittels dieser Verfahren gegossen werden.The process of the invention using the refractory Container obtained grid structures can be integrated into castings, with various casting methods such as die casting, chill casting, Centrifugal casting, low pressure casting or counter-pressure casting are produced can. Also, the grid structures themselves can by means of these methods to be poured.
Das Verfahren ermöglicht die Herstellung von Gitternetzstrukturen unterschiedlichster Feinheit bezüglich der Stegstärken und Zellgrößen. Auch Kombinationen unterschiedlicher Zellgrößen und Stegstärken in einem Körper sind möglich.The method enables the production of lattice structures of various kinds Fineness in terms of bar strengths and cell sizes. Also combinations Different cell sizes and thicknesses in a body are possible.
Das Verfahren kann kontinuierlich durchgeführt werden, da auf die in den Verfahren des Standes der Technik notwendigen Wachsplatten zum Verkleben der Schaum-Vorstruktur verzichtet wird. Durch Anwendung des erfindungsgemäßen Verfahrens wird demnach eine automatisierte Fertigung von Gitternetzstrukturen ermöglicht. The process can be carried out continuously, as in the procedures The prior art required wax plates for bonding the Foam Vorstruktur is omitted. By application of the invention The method is therefore an automated production of grid structures allows.
Als Schaum-Vorstruktur kann jedes Material verwendet werden, das eine ausreichende Anzahl von Poren aufweist. Vorzugsweise ist dieses Material Polyurethanschaum. Als feuerfestes Material wird bevorzugt Gips eingesetzt. Die Metallschmelze besteht aus Metallen, Metallegierungen, Keramiken bzw. Metallkeramiken. Es kann jedoch jedes gießbare Material verwendet werden.As a foam pre-structure, any material can be used which has a sufficient Number of pores. Preferably, this material is polyurethane foam. As a refractory material gypsum is preferably used. The Metal melt consists of metals, metal alloys, ceramics or metal ceramics. However, any castable material can be used.
Die durch dieErfindung erhaltenen metallischen Gitternetzstrukturen können beispielsweise als Katalysatoren, zur EMV-Abschirmung und in Batterien eingesetzt werden. Beispielsweise wird für die Herstellung eines Katalysators zur Verbrennungsstabilisierung von Dieselkraftstoff eine Zn/Cu-Legierung als Metallschmelze verwendet, mit der das feuerfeste Material gefüllt wird. In Batterien können beispielsweise durch die Erfindung erhaltene Gitternetzstrukturen eingesetzt werden, die aus Aluminium bestehen, und die im Anschluß an Schritt (8) mit Blei beschichtet werden.The metallic grid structures obtained by the invention can For example, as catalysts, for EMC shielding and used in batteries become. For example, for the preparation of a catalyst for Combustion stabilization of diesel fuel a Zn / Cu alloy as molten metal used, with which the refractory material is filled. In batteries For example, grid structures obtained by the invention can be used made of aluminum, and the following Step (8) be coated with lead.
Claims (6)
- Method for the production of metallic reticular structures, the method comprising the steps of:(1) placing a reticulated foam pre-structure into a first, openable container;(2) infiltrating the foam pre-structure with a refractory material;(3) solidifying the refractory material;(4) withdrawing the solidified refractory material along with the foam pre-structure from the first, openable container;(5) removing the foam pre-structure from the refractory material;(6) placing the resulting, pre-heated body into a second, heat-resistant container;(7) infiltrating the body with a molten metal;(8) withdrawing the resulting body from the second, heat-resistant container after the molten metal has solidified and removing the refractory material.
- Method for the production of metallic reticular structures according to claim 1, wherein, after withdrawing the hardened refractory material with the foam pre-structure from the first, openable container (step (4)), the foam pre-structure protrudes from the refractory material.
- Method for the production of metallic reticular structures according to claim 1 or 2, wherein, subsequent to infiltrating the body with molten metal (step (7)), a solid jacket is cast on the reticular structure.
- Method for the production of metallic reticular structures according to one of the claims 1 to 3, wherein, subsequent to step (1), the surface of the foam pre-structure is modified by roughening.
- Method for the production of metallic reticular structures according to one of the claims 1 to 3, wherein, subsequent to step (1), the surface of the foam pre-structure is modified by structuring.
- Method for the production of metallic reticular structures according to one of the claims 1 to 5, wherein, subsequent to step (8), the surface of the reticular structure is modified by coating.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19939155 | 1999-08-20 | ||
DE19939155A DE19939155A1 (en) | 1999-08-20 | 1999-08-20 | Production of metallic lattice network structure comprises inserting foam pre-structure into container, infiltrating with refractory material, and solidifying |
PCT/DE2000/002597 WO2001014086A1 (en) | 1999-08-20 | 2000-08-04 | Method and device for producing reticular structures |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1227908A1 EP1227908A1 (en) | 2002-08-07 |
EP1227908B1 true EP1227908B1 (en) | 2003-10-29 |
Family
ID=7918788
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00958218A Expired - Lifetime EP1227908B1 (en) | 1999-08-20 | 2000-08-04 | Method for producing metallic reticular structures |
Country Status (9)
Country | Link |
---|---|
US (1) | US6857461B2 (en) |
EP (1) | EP1227908B1 (en) |
JP (1) | JP2003507192A (en) |
AT (1) | ATE252956T1 (en) |
AU (1) | AU6982700A (en) |
CA (1) | CA2381843C (en) |
DE (2) | DE19939155A1 (en) |
ES (1) | ES2209965T3 (en) |
WO (1) | WO2001014086A1 (en) |
Cited By (2)
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DE102014118177A1 (en) | 2013-12-19 | 2015-06-25 | Mayser Gmbh & Co. Kg | Process for producing metallic moldings, metallic moldings and method for forming a component with a heat exchanger |
DE102014118178A1 (en) | 2013-12-19 | 2015-06-25 | Mayser Gmbh & Co. Kg | Method for producing a metallic structure |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
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DE10257942A1 (en) * | 2002-12-12 | 2004-06-24 | Krauss-Maffei Wegmann Gmbh & Co. Kg | Protection module for protection against hollow charges includes layer sequence of three-dimensional metal grid structure or open-pore metal foam and air layers |
DE10340681B4 (en) * | 2003-09-04 | 2006-09-28 | M.Pore Gmbh | Process for producing a cohesive, heat-conducting connection between an open-pored foam structure and a non-porous body for heat exchangers, in particular a heat sink |
DE102004026959B3 (en) * | 2004-06-02 | 2006-02-16 | Girlich, Dieter, Dr. | Process for producing metallic lattice structures |
DE102005037141A1 (en) * | 2005-08-06 | 2007-02-08 | Syntan Gbr(vertretungsberechtigter Gesellschafter Hr. Dr. Dieter Girlich, 01309 Dresden) | Spongy-metallic implant and method for its production |
EP2201306A1 (en) * | 2007-10-25 | 2010-06-30 | Bekaert Combust. Technol. B.V. | Metallic porous body incorporated by casting into a heat exchanger |
EP2431681A1 (en) | 2007-10-30 | 2012-03-21 | Büchi Labortechnik AG | Heating, method for heating and laminating and spray drier |
DE102007062302A1 (en) | 2007-12-21 | 2009-06-25 | Beru Ag | heater |
DE102009011763B4 (en) | 2009-03-04 | 2012-11-08 | Bpe International Dr. Hornig Gmbh | Process for producing an open-pore metallic lattice structure and lightweight material consisting thereof |
DE102009013058A1 (en) | 2009-03-16 | 2010-09-23 | Wolfgang Kollmann | Metal structure comprises a flat substrate made of non-conductive fibers, which form a cross-linked thread-structure, where the substrate is a non-woven and is metallized with a metal on one side |
WO2010112393A1 (en) | 2009-04-03 | 2010-10-07 | Nv Bekaert Sa | Improved heat exchanger |
WO2010112392A1 (en) | 2009-04-03 | 2010-10-07 | Nv Bekaert Sa | 3 d heat exchanger |
EP2494299B1 (en) | 2009-10-29 | 2014-09-24 | Universiteit Gent | Manufacturing heat exchanger from porous medium and conduits |
EP2572009A1 (en) | 2010-05-20 | 2013-03-27 | Universiteit Gent | 3d porous material comprising machined side |
US9737930B2 (en) * | 2015-01-20 | 2017-08-22 | United Technologies Corporation | Dual investment shelled solid mold casting of reticulated metal foams |
US9789536B2 (en) | 2015-01-20 | 2017-10-17 | United Technologies Corporation | Dual investment technique for solid mold casting of reticulated metal foams |
US9789534B2 (en) | 2015-01-20 | 2017-10-17 | United Technologies Corporation | Investment technique for solid mold casting of reticulated metal foams |
US10035174B2 (en) | 2015-02-09 | 2018-07-31 | United Technologies Corporation | Open-cell reticulated foam |
US9884363B2 (en) * | 2015-06-30 | 2018-02-06 | United Technologies Corporation | Variable diameter investment casting mold for casting of reticulated metal foams |
US9731342B2 (en) | 2015-07-07 | 2017-08-15 | United Technologies Corporation | Chill plate for equiax casting solidification control for solid mold casting of reticulated metal foams |
CN109513907A (en) * | 2018-11-07 | 2019-03-26 | 三峡大学 | A kind of preparation method of 20 four sides leptospira structure foamed aluminium |
CN110449563B (en) * | 2019-08-30 | 2020-11-10 | 西安交通大学 | Silicon carbide ceramic-nickel-based alloy composite material part and preparation method thereof |
CN112355277B (en) * | 2019-10-29 | 2022-02-08 | 沈阳铸造研究所有限公司 | High-melting-point Kelvin structure lattice metal and preparation method and application thereof |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3946039A (en) * | 1967-10-30 | 1976-03-23 | Energy Research & Generation, Inc. | Reticulated foam structure |
US3616841A (en) * | 1967-10-30 | 1971-11-02 | Energy Research And Generation | Method of making an inorganic reticulated foam structure |
US3996991A (en) * | 1973-11-13 | 1976-12-14 | Kubota, Ltd. | Investment casting method |
JPS5344427A (en) * | 1976-10-05 | 1978-04-21 | Kubota Ltd | Method to manufacture propellers by using extinguishable pattern |
JPS6340663A (en) * | 1986-08-05 | 1988-02-22 | Miyagawa Kasei Kogyo Kk | Casting device for current collector grid for lead storage battery |
JPS6384758A (en) * | 1986-09-29 | 1988-04-15 | Nippon Steel Corp | Production of complex casting |
-
1999
- 1999-08-20 DE DE19939155A patent/DE19939155A1/en not_active Withdrawn
-
2000
- 2000-08-04 AT AT00958218T patent/ATE252956T1/en not_active IP Right Cessation
- 2000-08-04 CA CA002381843A patent/CA2381843C/en not_active Expired - Lifetime
- 2000-08-04 JP JP2001518212A patent/JP2003507192A/en not_active Withdrawn
- 2000-08-04 AU AU69827/00A patent/AU6982700A/en not_active Abandoned
- 2000-08-04 WO PCT/DE2000/002597 patent/WO2001014086A1/en active IP Right Grant
- 2000-08-04 DE DE50004277T patent/DE50004277D1/en not_active Expired - Lifetime
- 2000-08-04 EP EP00958218A patent/EP1227908B1/en not_active Expired - Lifetime
- 2000-08-04 ES ES00958218T patent/ES2209965T3/en not_active Expired - Lifetime
-
2002
- 2002-02-20 US US10/079,331 patent/US6857461B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014118177A1 (en) | 2013-12-19 | 2015-06-25 | Mayser Gmbh & Co. Kg | Process for producing metallic moldings, metallic moldings and method for forming a component with a heat exchanger |
DE102014118178A1 (en) | 2013-12-19 | 2015-06-25 | Mayser Gmbh & Co. Kg | Method for producing a metallic structure |
Also Published As
Publication number | Publication date |
---|---|
CA2381843A1 (en) | 2001-03-01 |
JP2003507192A (en) | 2003-02-25 |
US6857461B2 (en) | 2005-02-22 |
US20020088598A1 (en) | 2002-07-11 |
WO2001014086A1 (en) | 2001-03-01 |
EP1227908A1 (en) | 2002-08-07 |
ES2209965T3 (en) | 2004-07-01 |
ATE252956T1 (en) | 2003-11-15 |
CA2381843C (en) | 2009-01-27 |
AU6982700A (en) | 2001-03-19 |
DE19939155A1 (en) | 2001-02-22 |
DE50004277D1 (en) | 2003-12-04 |
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