EP1356131B1 - Procede de realisation de mousse metallique et corps metallique produit a partir de celle-ci - Google Patents

Procede de realisation de mousse metallique et corps metallique produit a partir de celle-ci Download PDF

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Publication number
EP1356131B1
EP1356131B1 EP02708278A EP02708278A EP1356131B1 EP 1356131 B1 EP1356131 B1 EP 1356131B1 EP 02708278 A EP02708278 A EP 02708278A EP 02708278 A EP02708278 A EP 02708278A EP 1356131 B1 EP1356131 B1 EP 1356131B1
Authority
EP
European Patent Office
Prior art keywords
metal
foam
mold
foaming agent
mould cavity
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
Application number
EP02708278A
Other languages
German (de)
English (en)
Other versions
EP1356131A2 (fr
Inventor
Benno Niedermann
Wilfried Knott
Manfred Recksik
Andreas Weier
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.)
Buehler Druckguss AG
Evonik Operations GmbH
Original Assignee
Buehler Druckguss AG
Goldschmidt 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 Buehler Druckguss AG, Goldschmidt GmbH filed Critical Buehler Druckguss AG
Publication of EP1356131A2 publication Critical patent/EP1356131A2/fr
Application granted granted Critical
Publication of EP1356131B1 publication Critical patent/EP1356131B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B22D25/005—Casting metal foams
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/08—Alloys with open or closed pores
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/08—Alloys with open or closed pores
    • C22C1/083—Foaming process in molten metal other than by powder metallurgy
    • C22C1/087—Foaming process in molten metal other than by powder metallurgy after casting in solidified or solidifying metal to make porous metals

Definitions

  • the invention relates to a method for the production of metal foam in a metal die casting machine, in particular of Metal foam made of aluminum materials and one after this Method produced metal body, for example, a component from such an aluminum material.
  • foamed metallic materials manufacture. These are characterized by lightweight construction, Stiffness, compressive strength, improved mechanical and acoustic Damping u. a. out.
  • casting cores are made Aluminum foam with an aluminum material cast or such inserted as molded parts in a component. Shell and core or Molding are made separately and then together connected. This has in addition to the high production costs as well a low production quality result.
  • foamable aluminum semi-finished products is atomized Aluminum powder to which a blowing agent is added. So for example, according to DE-A-197 44 300 a from a powder mixture pressed body in a heated, closed Vessel at temperatures above the decomposition temperature the blowing agent and / or the melting temperature of the metal is heated.
  • the powder is compacted and the resulting molded part is placed in the photograph2020 area of a component and foamed by heating up to 650 ° C. It can the "shell" is subject to impermissible deformations or the Foaming process is uneven.
  • JP-A-03017236 are metallic Article with cavities generated by the fact that gases in one Molten metal are dissolved and the foaming process by sudden pressure reduction is initiated. By cooling the melt is stabilized foam.
  • W.Thiele Filler-containing Aiuminium sponge - a compressible Casting material for the absorption of impact energy. in: metal 28, 1974, Issue 1, p. 39 to 42 describes the preparation of Foamed aluminum.
  • the desired cavities are in size, Shape and position in the form of a loose bed of easily compressible inorganic lightweight materials, such as blown Clay minerals, expanded clay, glass foam balls or hollow corundum balls etc. specified.
  • the lightweight packing is in brought a mold. The remaining spaces of the Fill are filled up with metal.
  • the aluminum sponge thus obtained is relatively poor mechanical load and contains the material of the bed.
  • DE-B-11 64 103 and DE-B-1 164 102 relate to a process for producing metal foam bodies.
  • a solid substance which decomposes on heating with formation of gas, with a molten Metal mixed in such a way that the solid substance is wetted by the metal.
  • a molten Metal mixed in such a way that the solid substance is wetted by the metal.
  • powdery Titanium hydride of a molten aluminum alloy and magnesium added at a temperature of 600 ° C.
  • the thus formed closed foam is then in a Mold poured to cool and solidify.
  • GB-A-892934 relates to the preparation of complex structures with foamed metal core and closed non-porous Surface, the execution of the method described from the filling of the metal-blowing agent mixture into the mold depends on the start of the foaming process.
  • DE-C-198 32 794 describes a process for the preparation of a Hollow profile filled with metal foam.
  • This method includes the steps of pressing the hollow profile from a Envelope material with an extrusion press, which is an extrusion die with a die and a mandrel, feeding the metal foam of a foam material through a supply channel to the hollow profile formed in the mandrel.
  • WO 92/21457 describes the Production of aluminum foam such that gas under the Surface of a molten metal is injected, wherein Abrasives serve as stabilizers.
  • EP-B-0 666 784 describes a method of molding a Particle stabilized metal foam, in particular an aluminum alloy by forming a composite of a metal matrix and finely divided solid stabilizing particles the solidus temperature of the metal matrix is heated, and gas bubbles in the molten metal compound below Surface are drained, thereby stabilized liquid foam on the surface of the molten metal composite train.
  • Characteristic is a molding of the metal foam by pressing the stabilized liquid foam in a mold and with a print that is only sufficient the liquid foam takes the shape of the mold without the Cells of the foam are significantly compressed and subsequent Cool and solidify the foam to a molded To receive the subject.
  • the foam is here by means of a movable plate pressed into the mold. A first moving one Plate pushes the liquid foam into the mold and molded Foam article is formed a smooth surface. A second moving plate gets into the foam inside the mold pressed to form smooth interior surfaces on the foam article.
  • the shaping can also be done by means of roles.
  • EP-A-0 804 982 Another method for the production of moldings made of metal foam teaches EP-A-0 804 982.
  • the Foaming in a heated chamber outside one Mold wherein the volume of the introduced into the chamber powder metallurgical starting material for the metal foam in its foamed with the entire foaming phase the volume of a filling of the mold substantially equivalent. All in the chamber located metal foam is pressed into the mold, in which a frothing with the remaining foaming capacity is continued until complete filling of the mold.
  • the mold is one Sand or ceramic form, the metal foam is used as semi-finished in introduced the chamber and only after foaming for Example pressed by means of a piston in the mold. At the Pushing the foam into the mold shears it. Form is not intended to be inhomogeneous with a foam of itself Structure filled.
  • DE-A-19 501 508 discloses a process for the preparation a cavity profile with reduced weight and increased Stiffness, for example, a component for the chassis of a Motor vehicle. This is made of die-cast aluminum and in whose cavities is a core of aluminum foam. The integrated foam core is made by powder metallurgy and then on the inner wall of a G mantechnikmaschinees fixed and using Druckg intelligentmaschine Cast metal.
  • the dissolution or blowing of propellant gases in molten metal is not suitable for the production of near net shape components, as a System consisting of melt with occluded gas bubbles not is sufficiently stable in time to be processed in shaping tools to become.
  • the solution to the above problem consists in a first Embodiment in a method for producing metal foam by adding a blowing agent to a molten metal, which is characterized in that the molten metal in introduces the mold cavity of a metal die casting machine and with a gas-releasing, solid at room temperature Foaming agent foams.
  • light metal foams for example, aluminum or aluminum alloys as integral foams, d. H. with closed outer skin, targeted as a gradient material and close to the final contour in one step by a casting process in a commercial die casting machine based on the use of solid, gas-releasing propellant, for example a metal hydride, in particular a light metal hydride.
  • solid, gas-releasing propellant for example a metal hydride, in particular a light metal hydride.
  • liquid or mushy metal is forced under high pressure into a mold which constitutes the mold cavity.
  • the metal is injected directly from the melting chamber with up to about 10 7 Pa in the mold, in accordance with the invention preferred cold chamber method, for example, for materials of Al and Mg alloys, the melt is only in a cold intermediate chamber and from there with more than 10 8 Pa pressed into the mold.
  • the casting performance of the hot chamber process is higher, but also the wear of the system.
  • the advantages of die casting are the good material strength, the clean surface, the high dimensional accuracy, the low wall thickness required, the possibility of complex casting design and the high operating speed. These advantages can be further improved by negative pressure (vacuum) in the mold.
  • Advantageously used here are available on the market, real-time controlled die casting machines.
  • the process sequence preferred according to the invention comprises Fill the required volume of molten metal in the Filling or casting chamber and their introduction into a mold cavity adding the blowing agent to the molten metal.
  • molten metal and propellants are in a preferred embodiment brought together in the mold cavity, wherein the Form volume defined filled with the melt-blowing agent mixture respectively is underfilled.
  • the blowing agent not directly in the mold cavity, but in a Golfoder Casting chamber brought into contact with the molten metal and The mixture is then introduced into the mold cavity.
  • the foaming itself takes place in the mold cavity, the one represents closed form. This can, however, as in die-casting or the like usual via risers for venting feature. Thereafter, the ejection of the substantially foamed Metal body.
  • the propellant is directly in the filling or casting chamber or in the mold cavity to the molten metal added, each integral in one operation foamed metal body are produced.
  • a smooth surface whose formation is well reproducible is. Due to the possible spray filling are different Wall thicknesses are easily adjustable. The walls are closed on all sides, clean, dense and homogeneous. An aftertreatment is usually not required. Inside are the manufactured ones Metal body increasingly porous and have a density gradient on.
  • the propellant should be in terms of its decomposition temperature on the melting temperature of the casting material (molten metal) be coordinated.
  • the decomposition may only above start from 100 ° C and should not be higher than about 150 ° C above be the melting temperature.
  • the metal content in the produced Metal body in the range of 5 to 95 vol .-% or wt .-%, depending on the volume or the thickness of the metal body, where a lower volume to surface ratio for higher Filling degree speaks.
  • the "shot” took place before foaming; the foaming process Expired in situ in the mold cavity. It was fast in the cold form foamed.
  • the component had a mass of only about 40% compared to conventional diecasting parts.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Powder Metallurgy (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)

Claims (6)

  1. Procédé de fabrication de mousse métallique par adjonction d'un agent propulseur à un métal en fusion, caractérisé en ce qu'on introduit le métal en fusion dans la cavité creuse du moule d'une machine de coulée sous pression en ce qu'on l'amène à expansion à l'aide d'un agent propulseur séparateur de gaz, qui est solide à température ambiante.
  2. Procédé selon la revendication 1, caractérisé en ce qu'on remplit ou en ce qu'on remplit insuffisamment la cavité creuse d'un moule d'un volume défini et en ce que l'expansion a lieu dans une cavité creuse non chauffée d'un moule.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'on met l'agent propulseur en contact avec le métal en fusion dans une chambre de remplissage ou dans une chambre de coulée, puis en ce qu'on introduit le mélange dans la cavité creuse du moule.
  4. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'on introduit l'agent propulseur dans la cavité creuse du moule.
  5. Procédé selon la revendication 4, caractérisé en ce qu'on introduit l'agent propulseur dans la cavité creuse du moule avant, après et/ou pendant l'introduction du métal en fusion dans celui-ci.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce qu'on utilise un métal en fusion en métal léger, notamment en aluminium ou en alliage aluminium.
EP02708278A 2001-02-01 2002-01-12 Procede de realisation de mousse metallique et corps metallique produit a partir de celle-ci Expired - Lifetime EP1356131B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10104339A DE10104339A1 (de) 2001-02-01 2001-02-01 Verfahren zur Herstellung von Metallschaum und danach hergestellter Metallkörper
DE10104339 2001-02-01
PCT/EP2002/000245 WO2002060621A2 (fr) 2001-02-01 2002-01-12 Procede de realisation de mousse metallique et corps metallique produit a partir de celle-ci

Publications (2)

Publication Number Publication Date
EP1356131A2 EP1356131A2 (fr) 2003-10-29
EP1356131B1 true EP1356131B1 (fr) 2005-04-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP02708278A Expired - Lifetime EP1356131B1 (fr) 2001-02-01 2002-01-12 Procede de realisation de mousse metallique et corps metallique produit a partir de celle-ci

Country Status (6)

Country Link
EP (1) EP1356131B1 (fr)
AT (1) ATE294251T1 (fr)
AU (1) AU2002242664A1 (fr)
DE (2) DE10104339A1 (fr)
ES (1) ES2240704T3 (fr)
WO (1) WO2002060621A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2619422C2 (ru) * 2015-07-31 2017-05-15 федеральное государственное автономное образовательное учреждение высшего образования "Санкт-петербургский политехнический университет Петра Великого" ФГАОУ ВО "СПбПУ" Способ получения пористого металлического тела из алюминиевого сплава

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JP2004058130A (ja) * 2002-07-31 2004-02-26 Kobe Steel Ltd 軽合金の射出発泡成形方法及び射出発泡成形装置
DE10325819B4 (de) * 2003-06-07 2005-06-23 Friedrich-Alexander-Universität Erlangen-Nürnberg Verfahren zur Herstellung eines Metallschaumkörpers
DE102004003743A1 (de) * 2004-01-23 2005-08-11 Bühler Druckguss AG Mischvorrichtung
DE102008000100B4 (de) 2008-01-18 2013-10-17 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur Herstellung eines leichtgewichtigen Grünkörpers, danach hergestellter leichtgewichtiger Grünkörper und Verfahren zur Herstellung eines leichtgewichtigen Formkörpers
EP3168273B1 (fr) 2015-11-11 2018-05-23 Evonik Degussa GmbH Polymere durcissable
EP3321304B1 (fr) 2016-11-15 2019-06-19 Evonik Degussa GmbH Mélanges de siloxanes ramifiés-cycliques de type d/t et leurs produits secondaires
EP3415547B1 (fr) 2017-06-13 2020-03-25 Evonik Operations GmbH Procédé de fabrication de polyéthersiloxanes liés par sic
EP3415548B1 (fr) 2017-06-13 2020-03-25 Evonik Operations GmbH Procédé de fabrication de polyéthersiloxanes liés par sic
EP3438158B1 (fr) 2017-08-01 2020-11-25 Evonik Operations GmbH Production de polyéthersiloxanes par une liaison sioc
EP3467006B1 (fr) 2017-10-09 2022-11-30 Evonik Operations GmbH Mélanges de siloxanes ramifiés-cycliques de type d/t et leurs produits secondaires
EP3492513B1 (fr) 2017-11-29 2021-11-03 Evonik Operations GmbH Procédé de fabrication de polyéthersiloxanes liés au sioc ramifiés dans la partie siloxane
EP3611215A1 (fr) 2018-08-15 2020-02-19 Evonik Operations GmbH Procédé de production de siloxanes portant des groupes acétoxy
EP3611214A1 (fr) 2018-08-15 2020-02-19 Evonik Operations GmbH Copolymères bloc polydiméthylsiloxane-polyoxyalkylène linéaires à liaisons sioc
EP3744774B1 (fr) 2019-05-28 2021-09-01 Evonik Operations GmbH Procédé de recyclage des silicones
ES2913783T3 (es) 2019-05-28 2022-06-06 Evonik Operations Gmbh Procedimiento para la purificación de acetoxisiloxanos
EP3744755A1 (fr) 2019-05-28 2020-12-02 Evonik Operations GmbH Procédé de production de siloxanes portant des groupes acétoxy
EP3744759A1 (fr) 2019-05-28 2020-12-02 Evonik Operations GmbH Procédé de fabrication de polyéthersiloxanes liés au sioc ramifiés dans la partie siloxane
EP3744760A1 (fr) 2019-05-28 2020-12-02 Evonik Operations GmbH Procédé de fabrication de polyéthersiloxanes liés au sioc ramifiés dans la partie siloxane
EP3744756A1 (fr) 2019-05-28 2020-12-02 Evonik Operations GmbH Systèmes acétoxy
EP3744754A1 (fr) 2019-05-28 2020-12-02 Evonik Operations GmbH Procédé de production de siloxanes portant des groupes acétoxy

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2619422C2 (ru) * 2015-07-31 2017-05-15 федеральное государственное автономное образовательное учреждение высшего образования "Санкт-петербургский политехнический университет Петра Великого" ФГАОУ ВО "СПбПУ" Способ получения пористого металлического тела из алюминиевого сплава

Also Published As

Publication number Publication date
WO2002060621A2 (fr) 2002-08-08
WO2002060621A3 (fr) 2002-09-19
ES2240704T3 (es) 2005-10-16
EP1356131A2 (fr) 2003-10-29
DE10104339A1 (de) 2002-08-08
ATE294251T1 (de) 2005-05-15
AU2002242664A1 (en) 2002-08-12
DE50202904D1 (de) 2005-06-02

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