Shell control manifold

Details Shell control manifold Shell control manifold

1975-10-17

1977-08-23

Abercrombie, Willie G.

Metal deforming

By use of closed-die and coacting work-forcer

With stripping or ejecting from tool

B21D 4500

Patent

active

040431681

ABSTRACT:
This disclosure relates to a manifold for use in conjunction with a reciprocating die set for controlling air pressure within a sealed die which is closed by a formed shell so as to make certain that the shell remains with the sealed die as it is retracted relative to a die center, the manifold providing for a predetermined vacuum within the sealed die, which vacuum being sufficient to assure retraction of the formed shell with the sealed die but at the same time being maintained sufficiently low so as to prevent damage to the shell during the ejection thereof from the sealed die.

REFERENCES:
patent: 3289453 (1966-12-01), Wyle et al.
patent: 3654796 (1972-04-01), Dunn
patent: 3881380 (1975-05-01), Paramonoff

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