Can bodies and method and apparatus for manufacture thereof

Details Can bodies and method and apparatus for manufacture thereof Can bodies and method and apparatus for manufacture thereof

1972-04-24

1976-05-04

Larson, Lowell A.

Metal deforming

By application of fluent medium, or energy field

With actuated tool engaging work

72 62, 72DIG14, B21D 5126

Patent

active

039539946

ABSTRACT:
A tubular can body comprising a radially expanded central portion, a neck at each end of the central portion, and a radially extending flange adjacent each neck at the ends of the tubular member. A tubular, elastomeric member is positioned within a die-contained can body and is pressurized to mold the can body to the shape of the die. The operation forms a radially expanded can body, necks the can body adjacent the radially expanded portion, and flanges the ends of the body in a single operation. A tapered elastomeric mandrel may be utilized in place of the tubular mandrel, obviating the necessity of lubricating the mandrel and allowing the body to be axially extended so that the material from which the can is formed is altered in cross section both radially and axially. A structural groove, suitably positioned in the mandrel surface allows flanging to be effected at the upper end of the can body without damage to the mandrel. Alternatively, an expandable member may be substituted in place of either the tubular or tapered mandrel to form the can body through use of hydraulic pressure.

REFERENCES:
patent: 2966872 (1961-01-01), Schmocker
patent: 3051112 (1962-08-01), VanLeer et al.
patent: 3310972 (1967-03-01), Erlandson et al.
patent: 3486703 (1969-12-01), Sorlie
patent: 3559435 (1971-02-01), Gerber
patent: 3566648 (1971-03-01), Norin et al.

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