EP 0128336 B1 19880330 - DEVICE FOR COMPACTING FOUNDRY SAND
Title (en)
DEVICE FOR COMPACTING FOUNDRY SAND
Publication
Application
Priority
DE 3317196 A 19830511
Abstract (en)
[origin: US4592406A] In an apparatus for the compaction of foundry sand by the impact of pressurized gas on the foundry sand as filled into a flask over a pattern plate with a pattern therein, a specially designed diaphragm is used to get an even and constant hardness of the mold in every horizontal plane thereof and/or to put an end to the formation of shear cracks in the mold between different parts of the volume of the sand. This diaphragm is placed over the so far uncompacted surface of the foundry sand and it has a permeability to gas varying with the height of the sand to be compacted so that such permeability is less in the parts with high and/or plateau-like pattern contours than in parts where there is no pattern on the pattern plate.
IPC 1-7
IPC 8 full level
B22C 15/08 (2006.01); B22C 15/00 (2006.01); B22C 15/24 (2006.01)
CPC (source: EP US)
B22C 15/00 (2013.01 - EP US)
Citation (examination)
EP 0089547 A1 19830928 - BADISCHE MASCHF GMBH [DE]
Designated contracting state (EPC)
CH DE FR IT LI
DOCDB simple family (publication)
EP 0128336 A1 19841219; EP 0128336 B1 19880330; DD 216654 A5 19841219; DE 3317196 A1 19841122; DE 3317196 C2 19881117; DE 3470121 D1 19880505; JP 2516863 B2 19960724; JP H07100586 A 19950418; JP S59218241 A 19841208; US 4592406 A 19860603
DOCDB simple family (application)
EP 84105049 A 19840504; DD 26295384 A 19840511; DE 3317196 A 19830511; DE 3470121 T 19840504; JP 33752391 A 19911127; JP 9031284 A 19840508; US 60711684 A 19840503