Patent ID: 7754140

Claim:
Method for producing dimensionally accurate metal foam made of foamable, powder-metallurgically produced metal half finished product with a melting point >200° C. by the steps of: placing foil separating material in a casting mould made of a diathermic material; introducing the foamable, powder-metallurgically produced metal half finished product that is foamable at a temperature above 200° C. into the casting mould which is heat resistant up to the melting point of the foamable material and having an expansion coefficient on the order of graphite and yttrium oxide with the foil separating material between walls of the casting mould and the foamable material; closing the casting mould in a gas-tight manner; controlled heating of the foamable material in the casting mould under conditions producing foaming and dimensionally accurate forming of the faces of the material with the help of radiation emitters whose energy emission is controlled, and which are applied on or through the mould; and removing the thus formed foam product from the mould wherein the casting mould is open on a pair of opposite sides, whereby the foamable material is introduced on one of said sides into the mould, is heated within a selected zone of the mould in said controlled manner and foamed in such a way, that it comes out on an opposite side of the mould as a continuous product in a foamed condition having the cross-sectional shape of the casting mould.