Method for regenerating the sand of sand molds and sand cores
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsHarald Schwickal, Matthias Huebner
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Abstract
For regenerating the sand, which is obtained from sand molds and/or sand cores, which are produced from the sand and soluble glass as a binder and are used in metal casting, the sand obtained from the sand molds and/or sand cores is subjected to a mechanical regeneration stage and a thermal regeneration stage. During or after the mechanical regeneration stage, the obtained sand is mixed with a hardener for soluble glass.
Claims19
A method of regenerating sand obtained from at least one of sand molds and sand cores produced from sand and soluble glass as a binder, the method comprising the acts of:
- subjecting the obtained sand to a mechanical regeneration stage and a thermal regeneration stage before returning the obtained sand to at least one of sand mold and sand core production;
- and
- mixing the obtained sand with a hardener for soluble glass either during the mechanical regeneration stage or after the mechanical regeneration stage but before the thermal regeneration stage.
Dependencies are inferred from the claim text.