Abstract: A method for machining a molding core from an aggregate material block, comprising: positioning the aggregate material block on a rotative base member; and rotating the base member and simultaneously machining the aggregate material block into the molding core. There is also provided a method for forming a casting mold including a molding core and a foundry casting core comprising: a core body having at least one convex shaped core print. The method comprises: providing at least one molding element having a mold cavity with at least one core-print pocket defined in a top side of the molding element; forming the molding core having at least one convex shaped core print; and inserting the molding core in the mold cavity with the at least one convex shaped core print engaged in a respective one of the at least one core-print pocket.

Abstract: A method for machining a sand molding element, comprising: inserting at least one hollow center body having an internal cavity in a predetermined position in a casting flask; filling the internal cavity of the hollow center body with unbonded sand; filling the casting flask with bonded sand to obtain a sand block; machining a mold cavity in the sand block; and emptying the internal cavity from the unbounded sand. There is also provided a method for machining a molding core from a sand block, comprising: providing a core base member having a concave upper surface; forming a sand block on the core base member with a lower surface of the sand block resting on the concave upper surface; and machining the molding core into the sand block, the molding core having a convex lower surface complementary to the concave upper surface of the core base member.

Abstract: A method for machining a sand molding element, comprising: inserting at least one hollow center body having an internal cavity in a predetermined position in a casting flask; filling the internal cavity of the hollow center body with unbonded sand; filling the casting flask with bonded sand to obtain a sand block; machining a mold cavity in the sand block; and emptying the internal cavity from the unbounded sand. There is also provided a method for machining a molding core from a sand block, comprising: providing a core base member having a concave upper surface; forming a sand block on the core base member with a lower surface of the sand block resting on the concave upper surface; and machining the molding core into the sand block, the molding core having a convex lower surface complementary to the concave upper surface of the core base member.