This diagram of a cupola illustrates the furnace's cylindrical shaft lined with refractory and the alternating layers of coke and metal scrap. The molten metal flows out of a spout at the bottom of the cupola. Cure To harden. Die A metal form used as a permanent mold for die casting or for a wax pattern in investment casting. Dowel A pin of various types used in the parting surface of parted patterns or dies to assure correct registry.
Draft refers to the taper of the pattern, which allows it to be extended from a compacted sand mold.
Drag The bottom half of a horizontally parted mold. Movable pins in pattern dies that help remove patterns from the die. The sand used to surround the pattern that produces the surface in contact with the molten metal. The amount of stock left on the surface of a casting for machining. A rigid metal or wood frame used to hold the sand of which a mold is formed and usually consisting of two parts, cope and drag.