Method for manufacturing aluminum alloy casting
AssigneeToyo Kogyo Co., Ltd.
InventorTeruo Nakanishi
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Abstract
A method for the manufacture of an aluminum alloy casting comprises pouring a molten aluminum alloy into a mold having a sand core therein, removing a portion of the sands used to form the core from the casting after the solidification thereof, heating the casting and, simultaneously, removing the remaining portion of the sands from the casting, and machining the casting to complete an aluminum alloy article having an aperture or cavity or any other trace complemental to the core.
Claims7
A method for manufacturing a casting of aluminum alloy by the use of a mold having therein a destructible core made of sands and a resin binder, said casting having defined therein at least one cavity complemental in shape to the core, which method comprises the steps of:
- pouring a molten aluminum alloy into the mold to form a casting therein;
- removing the casting from the mold together with the core after it has been solidified;
- destroying the core in the casting to such as to permit the removal of a portion of the sand used to form the core from the casting;
- heating the casting to burn out and weaken the bonding capability of the resin component contained in the remaining sand located inside the casting so as to facilitate a complete removal of the sand therefrom, said casting being during the heating step, simultaneously subjected to a solid solution treatment and quenching treatment of the casting;
- rapidly cooling the casting to quench it;
- and
- drying said casting.
Dependencies are inferred from the claim text.