Rubber
The Lamina Marsh Mellow® Die Spring is a proven cost saver for the metal stamping industry. Marsh Mellow® Die Springs can be used as a maintenance free replacement for costly self contained nitrogen cylinders. The unique construction elements are the secret of the spring design flexibility.
The solid rubber core with hollow center and bias-ply fabric wrap are combined to meet special load and performance requirements. When designed into proper applications, Marsh Mellow® Die Springs can give up to and greater than 1 millioncycles of life.