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A rivet machine is provided. The rivet machine employs a die including a die body that has an inner wall with a pair of retaining ribs or projections extending inwardly therefrom. In use, the rivet pushes a slug from a workpiece within which it is mounted and into an opening of the die. The projecti

A rivet machine is provided. The rivet machine employs a die including a die body that has an inner wall with a pair of retaining ribs or projections extending inwardly therefrom. In use, the rivet pushes a slug from a workpiece within which it is mounted and into an opening of the die. The projections engage and retain the slug within the inner wall. According to further aspects, the pair of retaining ribs are diametrically opposed around the inner wall. Each of the retaining ribs has two converging surfaces that form an angle of between 90 and 150 degrees. In yet another aspect, the projections can be discontinuous such that a first retaining rib is longitudinally offset on the inner wall from a second retaining rib.

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1. A rivet machine comprising: a rivet;a punch; anda die including a die body having an inner wall that defines an opening, the inner wall comprising a generally cylindrical shape with at least one pair of fixed projections extending inwardly therefrom, wherein the rivet pushes a slug from a workpie

1. A rivet machine comprising: a rivet;a punch; anda die including a die body having an inner wall that defines an opening, the inner wall comprising a generally cylindrical shape with at least one pair of fixed projections extending inwardly therefrom, wherein the rivet pushes a slug from a workpiece within which the slug is mounted and into the opening, against the inner wall wherein said body further includes a longitudinal chute being a through opening in which multiple slugs are passed through the through opening. 2. The rivet machine of claim 1 wherein the at least one pair of projections comprise diametrically opposed projections. 3. The rivet machine of claim 1 wherein the at least one pair of projections comprise at least one projection having two converging surfaces. 4. The rivet machine of claim 3 wherein the two converging surfaces comprise a first and a second surface that form an angle of between 90 and 150 degrees. 5. The rivet machine of claim 4 wherein the first and second surfaces form an angle of 120 degrees. 6. The rivet machine of claim 3 wherein the at least one pair of projections comprises two projections each having two planar surfaces that converge. 7. The rivet machine of claim 3 wherein the at least one pair of projections comprises three pair of projections. 8. The rivet machine of claim 7 wherein each pair of the three pairs of projections comprise diametrically opposed projections. 9. The rivet machine of claim 2 wherein the pair of projections initiate from a first diameter of the inner wall and terminate at a second diameter of the inner wall, wherein the second diameter is less than the first diameter. 10. The rivet machine of claim 9 wherein the second diameter is substantially between 90 and 95 percent of the first diameter. 11. The rivet machine of claim 1 wherein the rivet is a self-piercing rivet. 12. The rivet machine of claim 1 wherein the at least one pair of projections are discontinuous wherein each projection of the pair of projections are formed by a first projection longitudinally offset from a second projection. 13. The rivet machine of claim 12 wherein the at least one pair of discontinuous projections are non-parallel relative to a longitudinal axis of the die body. 14. A rivet machine comprising: a rivet;a punch; anda 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. 15. The rivet machine of claim 14 wherein the at least one pair of retaining ribs comprises a first and a second retaining rib, each having a first and a second converging surface that form an angle of between 90 and 150 degrees. 16. The rivet machine of claim 15 wherein the first and second converging surfaces form an angle of 120 degrees. 17. The rivet machine of claim 14 wherein the at least one pair of retaining ribs comprises three pair of diametrically opposed retaining ribs. 18. The rivet machine of claim 14 wherein the at least one pair of retaining ribs initiate from a first diameter of the inner wall and terminate at a second diameter of the inner wall, wherein the second diameter is less than the first diameter. 19. The rivet machine of claim 18 wherein the second diameter is substantially between 90 and 95 percent of the first diameter. 20. The rivet machine of claim 14 wherein the rivet is a self-piercing rivet. 21. The rivet machine of claim 14 wherein the at least one pair of retaining ribs are discontinuous wherein each retaining rib of the pair of retaining ribs are formed by a first retaining rib portion longitudinally offset from a second retaining rib portion. 22. The rivet machine of claim 21 wherein the at least one pair of discontinuous retaining ribs are non-parallel relative to axis of the bore. 23. 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; anda 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. 24. The rivet machine of claim 23 wherein the at least one pair of retaining ribs comprises a first and a second retaining rib, each having a first and a second converging surface that form an angle of between 90 and 150 degrees. 25. The rivet machine of claim 24 wherein the first and second converging surfaces form an angle of 120 degrees. 26. The rivet machine of claim 23 wherein the at least one pair of retaining ribs comprises three pair of diametrically opposed retaining ribs. 27. The rivet machine of claim 23 wherein the at least one pair of retaining ribs initiate from a first diameter of the inner wall and terminate at a second diameter of the inner wall, wherein the second diameter is less than the first diameter. 28. The rivet machine of claim 27 wherein the second diameter is substantially between 90 and 95 percent of the first diameter.