Die for rivet machine

A rivet machine comprising:

• a rivet;
• a punch;
• and
• a die including a die button having a fixed inner wall that defines an opening for receiving a slug, the inner wall comprising a bore having first and second openings that defines an axis, the bore having at least one pair of retaining ribs extending from the inner wall in a direction toward the axis, wherein the rivet pushes the slug from a workpiece within which the slug is mounted and into the opening to a position at least partially within the bore, and in contact with the retaining ribs, and wherein the slug from the workpiece remains at least partially within the bore until a subsequent rivet pushes a subsequent slug into the bore such that the subsequent slug substantially pushes the slug out from the second opening of said bore.

A rivet machine comprising:

• a self-piercing rivet;
• a punch that cycles from a first position to a second position causing the self-piercing rivet to be driven into a workpiece and a slug to be expelled from the workpiece within which it the slug is mounted;
• and
• a die including a die button having an inner wall that defines an opening for receiving a slug, the inner wall comprising a bore that defines an axis, the bore having at least one pair of fixed and diametrically opposed retaining ribs extending from the inner wall in a direction toward a second opening of the die positioned along the axis, wherein the slug is directed into the opening to a position at least partially within the bore, and in contact with the at least one pair of retaining ribs, wherein the punch stops from entering the opening in the second position.