Mechanically and thermally stable core, used for light metal- and/or investment casting, comprises hydrophilic aerogel granulates, sand and binding agent

摘要

A mechanically and thermally stable core for the light metal- and/or investment casting, comprises hydrophilic aerogel granulate, sand and binding agent. An independent claim is included for the production of a core comprising: mixing the aerogel granulates with sand and binding agent; bringing the mixture into a negative form of the core; condensing the mixture in the negative form; drying the condensed mixture; and drafting the core in the negative form.