Blank Holder

The part of a draw die which holds the work piece against the draw ring to control metal flow. A blank holder is also called binder, binder ring, or ring. That part of a forming die which holds the blank by pressure against a mating surface of the die to control metal flow and prevent wrinkling. The blank holder is sometimes referred to as “hold down” or binder area. Pressure applied by mechanical means, springs, air, or fluid cushions (Automotive Steel Partnership, 1991, p.2).

Source: The OHIO State University