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1. (WO2017037522) METHOD OF PRODUCTION OF COMPONENT FROM METAL FOAM, COMPONENT PRODUCED BY SAID METHOD AND MOULD FOR THE REALIZATION OF SAID METHOD

Pub. No.:    WO/2017/037522    International Application No.:    PCT/IB2015/059639
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Wed Dec 16 00:59:59 CET 2015
IPC: B22D 25/00
C22C 1/08
C22C 21/00
Applicants: ÚSTAV MATERIÁLOV A MECHANIKY STROJOV SAV
Inventors: SIMANČÍK, František
PAVLÍK, Ľubomír
ŠPANIELKA, Ján
TOBOLKA, Peter
Title: METHOD OF PRODUCTION OF COMPONENT FROM METAL FOAM, COMPONENT PRODUCED BY SAID METHOD AND MOULD FOR THE REALIZATION OF SAID METHOD
Abstract:
Foamable semifinished product (1) in the form of granules produced from the metal alloy and the foam agent is inserted into the cavity of the closable mould (2) and the liquid (3) with the density that is higher than the apparent (or bulk) density of the resulting foam is led to it. The liquid has a temperature which is higher than the temperature of the melting of the metal alloy; the transfer of the heat to the particles of the foamable semifinished product (1) takes place; it subsequently expands, whereby it is supported by the liquid (3). During the expansion at least part of the liquid (3) is pushed by the expansion itself out of the mould (2) through the opening. The liquid (3) allows the regulation of the pressure of the environment of the foam agent, too, which helps to set exactly the moment of expansion. The metal melt can be advantageously used as liquid (3). The melt can partially remain in the mould (2) so the hybrid strucutre of the component is created. The new method makes the foaming significantly quicker, it secures the homogenity of the metal foam, simplifies the moulds and diminishes the energy demands for the whole process.