US Patent 7754140 Method and device for producing dimensionally accurate foam

A method for producing dimensionally accurate metal foam from a foamable, powder metallurgically produced metal semifinished product having a melting point >200° C. involving: the introduction of material, which is capable of foaming above 200 ° C., into a mold which has a coefficient of expansion of less than 3 K−1 Controlled heating of the foamable material inside the mold is performed while radiators foam the material, and the foamed product formed thereby removed from the mold. A device for producing dimensionally accurate thermally foamed metal foam parts that is has a thin-walled mold, which is stable at the melting temperature of the metal foam and which has a coefficient of expansion of <3K−1; a controllable irradiating device, and; a controller that controls the irradiating device based on the measurement given by a radiation measuring device.