What is the complete process of sand casting a part?

Pattern board is placed between the cope and the drag with the drag side up; essentially the flask starts upside down. Sand is packed into the drag, and a board is placed over the drag, then the drag is flipped exposing the cope where the sprue and riser pins are placed; these pins are attached to the pattern and will be removed once the pattern is removed. Then the cope is packed with sand. The cope is removed, with the packed sand held in place, the pattern is then removed(drawn) exposing the open side of the drag, then the runner and gate are curved into the open side of the drag and cope. The core is positioned, and the mold is reassembled, and the molten metal poured. After solidification, the workpiece is removed from the sand for further processing.