WO1993025718A1 - Procede de fabrication de pieces moulees et leur utilisation - Google Patents

Procede de fabrication de pieces moulees et leur utilisation Download PDF

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Publication number
WO1993025718A1
WO1993025718A1 PCT/CH1993/000146 CH9300146W WO9325718A1 WO 1993025718 A1 WO1993025718 A1 WO 1993025718A1 CH 9300146 W CH9300146 W CH 9300146W WO 9325718 A1 WO9325718 A1 WO 9325718A1
Authority
WO
WIPO (PCT)
Prior art keywords
aluminum
heat shield
different
aluminum mixture
mixture
Prior art date
Application number
PCT/CH1993/000146
Other languages
German (de)
English (en)
Inventor
Ivan Ghéczy
Erhard Saur
Original Assignee
Matec Holding Ag
Alusuisse S.A.
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 Matec Holding Ag, Alusuisse S.A. filed Critical Matec Holding Ag
Priority to EP93909755A priority Critical patent/EP0598866A1/fr
Priority to JP6500996A priority patent/JPH07504947A/ja
Publication of WO1993025718A1 publication Critical patent/WO1993025718A1/fr

Links

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
    • 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
    • B22F3/10—Sintering only
    • B22F3/11—Making porous workpieces or articles
    • B22F3/1121—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers
    • B22F3/1125—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers involving a foaming process
    • 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
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy

Definitions

  • the present invention relates to a method for the production of molded parts according to the preamble of claim 1 and the use of this method for producing the acoustically effective heat shield.
  • heat shields have also become known in which the acoustic effectiveness is increased or increased by the use of flame-resistant fiber mixtures. the height of the heat shields has been significantly reduced.
  • a recyclable component is to be created which has both good heat-insulating and sound-absorbing properties and also a particularly high inherent strength.
  • the open-pore surface is coated.
  • This coating can consist of an oxide layer and / or a dirt and water-repellent protective covering.
  • this protective covering can only be loosely stretched over the component in order to further increase its acoustic effectiveness.
  • the component according to the invention allows simple assembly, has high long-term stability and is easy to dispose of. can be easily recycled.
  • a method specially developed for this purpose is used to produce an aluminum foam suitable for the heat shield according to the invention, although various methods for producing aluminum foam are generally already known.
  • a method has also become known in which finely powdered aluminum, typically with a grain diameter of 20-200 .mu.m, is mixed with titanium hydride, this powder mixture is wound into an aluminum sheet, compacted and pressed into a preform, which in turn can be processed further.
  • this object is achieved by the features of claim 1.
  • aluminum which has evaporated is mixed with about 2% calcium bicarbonate and foamed and shaped directly in the molding press. It is understood that the aluminum used to increase the strength can be mixed with manganese, magnesium or a mixture thereof, preferably about 5%. In particular, recycled aluminum can be used as well as pure aluminum.
  • the main advantages of this method are that the electrolysis metal that is consumed is extremely cost-effective, that the calcium bicarbonate used only becomes active at approx. 570 ° C., and in this way a directly formable, naturally hard material with, for example, strength from 190N can be created.
  • the heat shield according to the invention is characterized in that the sound and heat insulating molded part consists of an open-pore aluminum foam.
  • a special development of this molded part has locally different foamed or. densified zones and shows different thicknesses and strengths at desired points.
  • the molded part according to the invention can have several layers or areas of different density and / or strength.
  • a protective coating is applied to this molded part, which protects the open-pore aluminum foam from all types of contamination, in particular from moisture. Suitable films are well known to the person skilled in the art.
  • a loosely stretched aluminum foil is particularly suitable for the present heat shield. It goes without saying that the open-pore aluminum foam part is provided with a skin directly during manufacture.
  • the heat shield according to the invention is produced using the method described in more detail below.
  • a suitable blowing agent In a first process step, aluminum powder is mixed with a suitable blowing agent.
  • the electrolysis metal which has been digested is preferably used.
  • a suitable melt can consist of • pure aluminum or recycled aluminum and can contain, for example, 5% manganese or magnesium or a mixture of manganese and magnesium.
  • Calcium bicarbonate has proven to be a suitable propellant, which only becomes active above 570 ° C, ie changes to a gaseous state and increases its volume by a factor of 1,000.
  • the preferably powdery mixture is brought into a suitable molding press and foamed there directly, i.e. heated and cooled again.
  • the foaming parameters strongly depend on the molded part to be produced.
  • the mold nest is heated to a temperature of 680 ° C. to 730 ° C. for 10-15 minutes. The foaming time can, however, be reduced considerably when working with preheated raw material.
  • the present method also allows the premixing to be first pressed in a cold press into a flat profile (pressing) and only then to be further processed, e.g. roll off or anneal. Since the foaming temperature is 680 ° C - 730 ° C, such a flat profile can be easily annealed at 350 ° C, i.e. H. a rolled and therefore extremely hard semi-product can also be inserted into the molding press.
  • the rolled-off semi-product can before foaming, i.e. H. be soft annealed during the heating phase of the mold. It goes without saying that even soft-annealed blanks can be fitted into the press mold before foaming.
  • This process enables the production of components of any shape with a particularly high strength.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Powder Metallurgy (AREA)
  • Building Environments (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Exhaust Silencers (AREA)

Abstract

Le procédé vise à fabriquer des pièces moulées en mousse d'aluminium. A cet effet, un mélange aluminium contenant un agent porogène est introduit directement dans une empreinte chauffable. Afin d'augmenter sa résistance ou de modifier d'autres propriétés physiques, le mélange aluminium peut contenir des additifs appropriés et être introduit dans l'empreinte sous forme de poudre ou de comprimé. Après introduction du mélange aluminium dans l'empreinte, cette dernière est chauffée afin de déclencher la réaction de moussage. Ce procédé permet de réaliser une structure individuelle de pièces moulées légères particulièrement résistantes que ce soit par zones présentant localement différents niveaux de moussage ou par une composition diversifiée au niveau des couches, et/ou des zones. Ces pièces moulées se prêtent particulièrement bien à l'absorption acoustique de sources sonores chaudes.
PCT/CH1993/000146 1992-06-09 1993-06-09 Procede de fabrication de pieces moulees et leur utilisation WO1993025718A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP93909755A EP0598866A1 (fr) 1992-06-09 1993-06-09 Procede de fabrication de pieces moulees et leur utilisation
JP6500996A JPH07504947A (ja) 1992-06-09 1993-06-09 成形品の製造方法とその利用

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1813/92-1 1992-06-09
CH181392A CH686413A5 (de) 1992-06-09 1992-06-09 Verfahren zur Herstellung von Formteilen und Anwendung desselben.

Publications (1)

Publication Number Publication Date
WO1993025718A1 true WO1993025718A1 (fr) 1993-12-23

Family

ID=4219202

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1993/000146 WO1993025718A1 (fr) 1992-06-09 1993-06-09 Procede de fabrication de pieces moulees et leur utilisation

Country Status (4)

Country Link
EP (1) EP0598866A1 (fr)
JP (1) JPH07504947A (fr)
CH (1) CH686413A5 (fr)
WO (1) WO1993025718A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0927591A2 (fr) * 1998-01-02 1999-07-07 Wilhelm Karmann GmbH Procédé de préparation d'un élément de construction comprenant une couche de mousse métallique
EP1000690A2 (fr) * 1998-11-13 2000-05-17 Schunk Sintermetalltechnik Gmbh Procédé de préparation d'un produit semi-fini moussable ainsi que d un produit semi-fini
DE19907855C1 (de) * 1999-02-24 2000-09-21 Goldschmidt Ag Th Herstellung von Metallschäumen
DE19734394C2 (de) * 1996-08-13 2003-06-18 Friedrich Wilhelm Bessel Inst Verfahren und Vorrichtung zur Herstellung von Metallschaum
DE102006025933A1 (de) * 2006-05-10 2007-11-22 WKW Erbslöh Automotive GmbH Dachreling sowie Verfahren zur Herstellung einer solchen Dachreling

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009228025A (ja) * 2008-03-19 2009-10-08 Ykk Corp 前駆体及び発泡金属成形体、並びにそれらの製造方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4018360C1 (en) * 1990-06-08 1991-05-29 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De Porous metal body prodn. - involves compaction at low temp. followed by heating to near melting point of metal
EP0460392A1 (fr) * 1990-06-08 1991-12-11 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Procédé pour la production d'un corps en mousse métallique

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4018360C1 (en) * 1990-06-08 1991-05-29 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De Porous metal body prodn. - involves compaction at low temp. followed by heating to near melting point of metal
EP0460392A1 (fr) * 1990-06-08 1991-12-11 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Procédé pour la production d'un corps en mousse métallique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 9, no. 267 (C-310)24. Oktober 1985 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19734394C2 (de) * 1996-08-13 2003-06-18 Friedrich Wilhelm Bessel Inst Verfahren und Vorrichtung zur Herstellung von Metallschaum
EP0927591A2 (fr) * 1998-01-02 1999-07-07 Wilhelm Karmann GmbH Procédé de préparation d'un élément de construction comprenant une couche de mousse métallique
EP0927591A3 (fr) * 1998-01-02 2002-07-03 Wilhelm Karmann GmbH Procédé de préparation d'un élément de construction comprenant une couche de mousse métallique
EP1000690A2 (fr) * 1998-11-13 2000-05-17 Schunk Sintermetalltechnik Gmbh Procédé de préparation d'un produit semi-fini moussable ainsi que d un produit semi-fini
EP1000690A3 (fr) * 1998-11-13 2001-01-24 Schunk Sintermetalltechnik Gmbh Procédé de préparation d'un produit semi-fini moussable ainsi que d un produit semi-fini
DE19907855C1 (de) * 1999-02-24 2000-09-21 Goldschmidt Ag Th Herstellung von Metallschäumen
DE102006025933A1 (de) * 2006-05-10 2007-11-22 WKW Erbslöh Automotive GmbH Dachreling sowie Verfahren zur Herstellung einer solchen Dachreling

Also Published As

Publication number Publication date
EP0598866A1 (fr) 1994-06-01
JPH07504947A (ja) 1995-06-01
CH686413A5 (de) 1996-03-29

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