EP0927591A2 - Procédé de préparation d'un élément de construction comprenant une couche de mousse métallique - Google Patents

Procédé de préparation d'un élément de construction comprenant une couche de mousse métallique Download PDF

Info

Publication number
EP0927591A2
EP0927591A2 EP98122773A EP98122773A EP0927591A2 EP 0927591 A2 EP0927591 A2 EP 0927591A2 EP 98122773 A EP98122773 A EP 98122773A EP 98122773 A EP98122773 A EP 98122773A EP 0927591 A2 EP0927591 A2 EP 0927591A2
Authority
EP
European Patent Office
Prior art keywords
component
foaming
semifinished product
coating
semi
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Withdrawn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
EP98122773A
Other languages
German (de)
English (en)
Other versions
EP0927591A3 (fr
Inventor
Wolfgang Seeliger
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.)
Wilhelm Karmann GmbH
Original Assignee
Wilhelm Karmann 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 Wilhelm Karmann GmbH filed Critical Wilhelm Karmann GmbH
Publication of EP0927591A2 publication Critical patent/EP0927591A2/fr
Publication of EP0927591A3 publication Critical patent/EP0927591A3/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • B22F2998/10—Processes characterised by the sequence of their steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Definitions

  • the invention relates to a method for the final shaping of a component according to the preamble of claim 1.
  • DE 196 12 781.5 C1 shows a method for the final shaping of such Components in which a semi-finished product is first formed into a semi-finished product, for example, deep-drawn, which is then in a foaming mold is foamed to its final thickness.
  • the invention solves this problem by a method with the features of claim 1 and / or the features of claim 6 and / or the Features of claim 11.
  • the semi-finished product is the residence time in the foaming mold, in which is heating the semi-finished product to effect the foaming of the Metal foam layer takes place, significantly reduced. If the semi-finished product is supported on the underside in the foam form and here an energy transfer takes place by heat conduction, however, the top of one Facing the radiation source, it is sufficient to coat only the top.
  • a soot coating is particularly advantageous, for example Acetylene black, either over an open flame or through a corresponding Coating process is easy to apply and after the foaming process can be removed from the finished building. Across from an untreated aluminum top layer is then the reflection during of the foaming is reduced so much that the residence time in the foaming mold is about halved.
  • the further processing of the component or its continuation for storage can be accelerated considerably if the component after foaming, what takes place in the temperature range between 500 ° C and 600 ° C a cooling medium is applied. This exposure can still take place within the foaming mold if the component is on the underside supporting support formwork air ducts are provided which are used for Coolant line serve. At the same time can be initiated by the bottom Air lift the component so that it is easier to get out of the frothing mold can be removed.
  • a further reduction in cycle times and thus the length of stay of the Molded semi-finished product in the foam form results from an inventive Preheat the semi-finished product to a temperature below the Decomposition temperature of the blowing agent is. If so preheated If semi-finished products are introduced into the foaming mold, it loses it less thermal energy than when inserting a non-preheated semi-finished product. The further heating-up time until the foaming process begins therefore be significantly reduced, the use of the frothing mold improved.
  • a component 1 according to the invention has a foamed layer 2, which is a metal powder and a Blowing agent comprises, which are homogeneous with one another by a mixing process were mixed and then under pressure, for example by axial pressing or by extrusion to a compact, foamable Semifinished product 2 '' (Fig. 1) has been compressed and solidified.
  • a foamed layer 2 which is a metal powder and a Blowing agent comprises, which are homogeneous with one another by a mixing process were mixed and then under pressure, for example by axial pressing or by extrusion to a compact, foamable Semifinished product 2 '' (Fig. 1) has been compressed and solidified.
  • the foamed layer 2 is on top and provided on the underside with a solid metal sheet 3, 4, what However, this is not mandatory and in particular when an inventive device is designed Component 1 is dispensable as a crash element. It is still possible a foamed layer 2 with only one solid metallic To connect top layer 3 or 4 or groups of several different foamed layers, possibly separated by to produce solid metallic layers, for example to impact elements create, depending on the impact speed and thus energy different number of foamed layers on the deformation participates through the impact.
  • a double-sided with solid metal sheets 3 and 4 provided foamed layer 2 is the connection between the layer 2 foamed at the end of the process and the solid metallic layer Sheets 3 and 4 came about under pressure in such a way that a metallic bond between the individual layers 2 ', 3', 4 'has been reached before the forming and foaming.
  • roll cladding a composite from the foamable Semifinished product 2 '' after extrusion or axial pressing is created, and the solid metal sheets 3 '', 4 '' between make two rollers 5, so that a composite material 6 with a sandwich structure two solid metallic cover layers 3 'and 4' and one not yet foamed porous intermediate layer 2 'is formed.
  • Such an essentially flat metallic composite material 6 the in any case comprises a foamable layer 2 ', has between the metallic sheets 3 'and 4' and the foamable layer 2 ' metallic bonds and is now available for further processing.
  • This flat composite material 6 is initially more suitable in pieces Size divided, for example with the help of a saw.
  • the composite material 6 is now formed into a semi-finished product 7, the deformation being both a continuous curvature of the composite 6 can effect as well as the expression of individual areas.
  • the shaping can be carried out using known customary shaping measures, for example by deep drawing with and without hold-down devices, as is the case in body construction is known, or by a one-sided forming process, such as that Fluid cell method.
  • a semi-finished product 7 is obtained, which is either flat or contains curved surface areas and possibly formed from this Contours and a foamable for further processing Layer 2 'includes.
  • the semi-finished product thus obtained is 7 before insertion into the foam mold, in which the blowing agent decomposes and then the foaming of the metal foam layer takes place with provided with a reflection-reducing coating.
  • the semi-finished product 7 is provided for a foaming mold 9, one wall 12 of which one side 10 of the semi-finished product 7 is supported essentially over the entire surface and therefore offers one contact to heat conduction, the other is sufficient Page 11 of the semi-finished product 7 with the anti-reflective coating to be provided, since this side 11 of a radiant heat source in the foam form 9 is facing. This is especially true if without one upper boundary formwork 13 is foamed freely.
  • the coating can be easily applied when the semi-finished product 7 with its surface 11 to be coated a row of flames is exposed, with the flames 14 in contact with the surface 11 occur and a carbon layer due to the incomplete combustion Deposit the form of soot on surface 11.
  • Conventional coating processes are of course also possible both a discrete and a continuous coating in all processes is possible. Either the semi-finished product 7 or one Move row of nozzles 15, which provide surface 11 with the coating are, as indicated in the drawing by arrow 16.
  • the Cooling takes place, as shown in Fig. 4, either by a liquid or as shown in Fig. 5 by a gaseous cooling medium.
  • the cooling device 17 or 18 above the surface 11 to be cooled are moved in order to make this possible Expose evenly to exposure to coolant 19.20.
  • this coolant exposure shown from above, the component in the supporting formwork 21 can remain, it is also possible that the supporting formwork 21 is provided with air channels, so that when initiated of coolant in these channels the component simultaneously from the formwork 21st is lifted off and cooled.
  • the component 1 before introduction is already preheated to a temperature in the frothing mold, which is close to the foaming temperature.
  • This is the temperature gradient between the semi-finished product 7 to be introduced and the foaming mold 9 low, the heating of the foaming mold 9 therefore with less Achieve energy expenditure and accelerated.
  • the preheating temperature is when using the blowing agent titanium hydride at about 400 ° C, so that the Blowing agent does not yet take place and the process of foaming not yet started during preheating. For this lies the lower one Limit temperature at approx. 430 ° C for titanium hydride.
  • the formwork for what is to be heated Molded semi-finished product 7 remains in the foam form and thus a temperature suitable for foaming.
  • Molded semifinished product 7 newly introduced into the foaming mold 9 so that only this must be heated to the required temperature of almost 600 ° C.
  • the speed of the foaming process is also easily adjustable, heating too quickly or too slowly, causing the disintegration of the Foam or a diffusion of hydrogen would lead avoid yourself.
  • the preheating itself can be done according to the requirements control is not critical due to the fact that foaming has not yet started.
  • the clock rate of the foaming mold 9 is also clear from this measure increased because the residual heating process for the inserted semi-finished product 7 can be accomplished much faster than without preheating.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Molding Of Porous Articles (AREA)
EP98122773A 1998-01-02 1998-12-01 Procédé de préparation d'un élément de construction comprenant une couche de mousse métallique Withdrawn EP0927591A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19800008A DE19800008C1 (de) 1998-01-02 1998-01-02 Verfahren zum Endformen eines Bauteils mit einer Schicht aus metallischem Schaumwerkstoff
DE19800008 1998-01-02

Publications (2)

Publication Number Publication Date
EP0927591A2 true EP0927591A2 (fr) 1999-07-07
EP0927591A3 EP0927591A3 (fr) 2002-07-03

Family

ID=7853926

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98122773A Withdrawn EP0927591A3 (fr) 1998-01-02 1998-12-01 Procédé de préparation d'un élément de construction comprenant une couche de mousse métallique

Country Status (2)

Country Link
EP (1) EP0927591A3 (fr)
DE (2) DE19800008C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19954755A1 (de) * 1999-11-15 2001-05-17 Schunk Sintermetalltechnik Gmb Verfahren und Vorrichtung zum Aufschäumen eines metallischen Werkstoffes
DE102017121513A1 (de) * 2017-09-15 2019-03-21 Pohltec Metalfoam Gmbh Verfahren zum Schäumen von Metall im Flüssigkeitsbad

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10034406A1 (de) * 2000-07-14 2002-01-24 Aaw Produktions Ag Mauren Verfahren zur Herstellung eines verformten, metallischen Verbundwerkstoffes
DE102009017376A1 (de) 2009-04-14 2010-10-21 GM Global Technology Operations, Inc., Detroit Verfahren zur Herstellung einer Stützstruktur, vorzugsweise einer Stützstruktur für einen Fahrzeugsitz

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2974034A (en) * 1957-12-12 1961-03-07 Lor Corp Method of foaming granulated metal
US4270951A (en) * 1978-12-08 1981-06-02 Ford Motor Company Sintering of coated briquette
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
WO1993025718A1 (fr) * 1992-06-09 1993-12-23 Matec Holding Ag Procede de fabrication de pieces moulees et leur utilisation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1433112A1 (de) * 1960-10-08 1968-10-17 Lor Corp Verschaeumen von gekoerntem Aluminium
DE19612781C1 (de) * 1996-03-29 1997-08-21 Karmann Gmbh W Bauteil aus metallischem Schaumwerkstoff, Verfahren zum Endformen dieses Bauteils und Vorrichtung zur Ausführung des Verfahrens

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2974034A (en) * 1957-12-12 1961-03-07 Lor Corp Method of foaming granulated metal
US4270951A (en) * 1978-12-08 1981-06-02 Ford Motor Company Sintering of coated briquette
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
WO1993025718A1 (fr) * 1992-06-09 1993-12-23 Matec Holding Ag Procede de fabrication de pieces moulees et leur utilisation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19954755A1 (de) * 1999-11-15 2001-05-17 Schunk Sintermetalltechnik Gmb Verfahren und Vorrichtung zum Aufschäumen eines metallischen Werkstoffes
DE102017121513A1 (de) * 2017-09-15 2019-03-21 Pohltec Metalfoam Gmbh Verfahren zum Schäumen von Metall im Flüssigkeitsbad
US11745262B2 (en) 2017-09-15 2023-09-05 Pohltec Metalfoam Gmbh Method for foaming metal in a liquid bath

Also Published As

Publication number Publication date
EP0927591A3 (fr) 2002-07-03
DE19800008C1 (de) 1999-07-08
DE19847273B4 (de) 2004-06-17
DE19847273A1 (de) 1999-10-21

Similar Documents

Publication Publication Date Title
EP0798062B1 (fr) Elément en mousse métallique
DE2837628A1 (de) Vorrichtung und verfahren zum formen expandierter kunststoffe durch ultrahochfrequenzstrahlung
AT401751B (de) Verfahren zum herstellen von langgestreckten profilierten teilen und vorrichtung zur durchführung des verfahrens
WO2000038863A1 (fr) Procede et dispositif de production d'un element profile compose de mousse metallique et d'une tole metallique
DE3231185A1 (de) Verfahren zur herstellung von innenverkleidungsmaterial aus wellpappe
DE1479126A1 (de) Verfahren zur Herstellung von hohlen Gegenstaenden aus Kunststoff
DE3047574A1 (en) A method of making mirror blanks including blanks made according to said method
DE3604175C2 (fr)
EP0927591A2 (fr) Procédé de préparation d'un élément de construction comprenant une couche de mousse métallique
EP1000690A2 (fr) Procédé de préparation d'un produit semi-fini moussable ainsi que d un produit semi-fini
DE2622903C2 (de) Verfahren zur Herstellung von Formkörpern aus Schaumstoff
DE19949263A1 (de) Verfahren zum Herstellen eines Kunststoffbauteiles
DE1753811C3 (de) Verfahren zum kontinuierlichen Herstellen geschäumter Bahnen aus vollständig ausgeschäumten Kunststoffperlen
DE2649526A1 (de) Verfahren zum herstellen eines hauptsaechlich aus thermoplastischem material bestehendem mehrschichtigen behaelters und form zur ausfuehrung des verfahrens
DE2217086A1 (de) Metallischer Verbundstreifen
DE19718035C2 (de) Verfahren zum Aufbringen von Kunststoffpartikel auf eine Kunststoffplatte zur Herstellung einer rauhen Oberfläche
DE19905124C1 (de) Verfahren und Vorrichtung zur Herstellung eines Profilteils
DE1729058A1 (de) Verfahren und Vorrichtung zum Verformen von aufgeschaeumter Folie aus thermoplastischem Material,beispielsweise aufgeschaeumtem Polystyrol
EP1081241B1 (fr) Procédé et utilisation d'une installation pour le moussage d'articles metalliques
DE1124225B (de) Verfahren zur Herstellung von Formkoerpern aus plastifiziertem Polyaethylen
DE3704036C2 (de) Verfahren und Vorrichtung zur Herstellung eines Thermoplast-Verbundformteils
CH619395A5 (en) Process and device for producing a multi-layer hollow body from thermoplastic material
EP1177875A1 (fr) Procédé pour la décoration d'articles moulés par injection
EP3878565A2 (fr) Procédé de fabrication d'un composant de revêtement intérieur pour un avion, ainsi que composant de revêtement intérieur
DE2707516A1 (de) Waermeisolierender mantel fuer rohr oder schlauch

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

RIC1 Information provided on ipc code assigned before grant

Free format text: 7B 22F 3/11 A, 7B 22F 3/00 B, 7B 22F 3/10 B

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20020808

17Q First examination report despatched

Effective date: 20021111

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20030115

AKX Designation fees paid

Designated state(s): AT CH DE DK LI