Metal working – Method of mechanical manufacture – Combined manufacture including applying or shaping of fluent...
Patent
1977-03-31
1978-05-09
Mehr, Milton S.
Metal working
Method of mechanical manufacture
Combined manufacture including applying or shaping of fluent...
241DIG37, 164 70, B22D 1112, B22D 3100
Patent
active
040878996
ABSTRACT:
The invention relates to a method of producing sand castings in which a set of castings incorporating the casting runners and risers is formed.
The castings, which are cast in pairs to form compact members, are placed in baskets and are subjected to refrigeration firstly in a precooling zone and then in a dipping zone in a liquid nitrogen tunnel. After this the compact members are placed on a breaking-up table where they are subjected to mechanical shocks to enable the castings to be separated from their casting risers and runners.
Applicable exclusively to "as cast" ductile cast iron.
REFERENCES:
patent: 1404682 (1922-01-01), Barker
patent: 2019727 (1935-11-01), Quinn et al.
patent: 2552029 (1951-05-01), Bludeau et al.
patent: 2881571 (1959-04-01), Granata
Chevalier Claude
Le Bot Jean-Pierre
Le Diouron Raymond
Le Floch Daniel
Schoutteten Christian
L'Air Liquide Societe Anonyme pour l'Etude et, l'Exploitation de
Mehr Milton S.
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