Loading patent…
AssigneeFriedrich-Alexander-Universitat-Erlangen-Nurngerg
InventorsRobert F Singer, Frank Heinrich, Carolin Korner, Gerhard Grotzschel
Estimating the term…
The invention relates to a method for producing a composite structure in which a foamed metal core (1) is surrounded with a metal body (3). Said method comprises the following steps: a) producing a foamed metal core (1) with an essentially closed surface; b) introducing the foamed metal core (1) into a pressure diecasting mould; c) filling said pressure diecasting mould at a first casting pressure (p1); d) reducing said first casting pressure (p1) before the pressure diecasting mould has been filled; e) filling the pressure diecasting mould entirely, the first casting pressure (p1) being reduced to zero or almost zero; and f) applying a second casting pressure (p2) and maintaining this for a predetermined holding period.
A process for producing a composite structure, in which a metal foam core (1) is surrounded by a metal body (3), comprising the following steps:
The process as claimed in one of the preceding claims, in which the first casting pressure (p1) is lower than the second casting pressure (p2).
The process as claimed in one of the preceding claims, in which the first casting pressure (p1) is reduced as soon as the die-casting die is at least 90% full by volume.
The process as claimed in one of the preceding claims, in which the pressure applied to the metal foam core (1) by the second casting pressure (p2) is lower than its compressive strength.
The process as claimed in one of the preceding claims, in which spacers (2) are formed integrally onto the metal foam core (1).
The process as claimed in one of the preceding claims, in which the metal foam core (1) is provided with a heat-resistant coating before step b).
The process as claimed in one of the preceding claims, in which the heat-resistant layer is produced from aluminum or from Al/Mg mixed oxide.
The process as claimed in one of the preceding claims, in which the die cavity surrounded by the die-casting die is subjected to a vacuum after step b).
A component produced using the process as claimed in one of the preceding claims.
Dependencies are inferred from the claim text.