Core Iron
A core iron may consist of a cast grate with pricker extensions for binding all parts of the entire core to one common core iron; or, it may be one of many which, being set and rammed within the sand contrariwise throughout the core, partially answers the purpose of a grate or other contrivance--in which instance they are often designated as "tie-rods," from the fact that, in dry cores especially, the sand clings to the inclosed iron and partakes of its strength. See CORE-ARBOR.
Core-lathe is the arrangement employed for covering a core-barrel with the requisite material and fashioning a core upon its outer surface. It consists of a pair of stands or trestles having V-shaped notches or semicircles on their upper edges in which to rest the trunnions of a core-barrel, or perhaps to receive a turned depression in the core-barrel itself. A handle or crank at the end serves to revolve the barrel while the core-maker pays out the straw rope upon it. A subsequent coat of clay, followed by another of loam, is fashioned by means of a sweep-board or templet at the back, the ends of which rest on the trestles. The core is thus shaped to the outline of the board, the diameter being regulated by the distance at which it is placed from the axis. See CORE-BARREL.