Method and apparatus for doming can bottoms

Details Method and apparatus for doming can bottoms Method and apparatus for doming can bottoms

1986-01-28

1988-02-09

Larson, Lowell A.

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

72348, B21D 5126

Patent

active

047234334

ABSTRACT:
A doming assembly for doming the bottom wall of a can body. A bodymaker punch urges a can bottom wall first against a forming ring and then against a domer die. The forming ring forms an outer annular portion of a dome and the domer die forms a central portion of a dome in the can bottom wall. The sequential engagement of the can bottom wall by first the forming ring, then the domer die prevents flower dome formation and axial can body shortening.

REFERENCES:
patent: 1270933 (1918-07-01), Elsener
patent: 3730383 (1973-05-01), Dunn et al.
patent: 3998174 (1976-12-01), Saunders
patent: 4120419 (1978-10-01), Saunders
patent: 4151927 (1979-05-01), Cvacho et al.
patent: 4222494 (1980-09-01), Lee et al.
patent: 4372143 (1983-02-01), Elert et al.

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