EP 2204246 B1 20181003 - Foundry core with improved gutting properties I
Title (en)
Foundry core with improved gutting properties I
Title (de)
Gießereikerne mit verbesserten Entkernungseigenschaften I
Title (fr)
Noyaux de fonderie dotés de propriétés de dénoyautage I améliorées
Publication
Application
Priority
DE 102008056856 A 20081112
Abstract (en)
[origin: EP2204246A2] The foundry core comprises sand, organic binder and resorcinol-formaldehyde-aerogel granulate, where the sand is quartz sand, sand based on aluminum oxide and/or sane based on mullite. The aerogel granulate and/or the sand has a grain size distribution of 0.1-0.9 mm. The aerogel granulate has a grain size of 0.5 mm. The portion of the aerogel granulate in the core is 12 vol.% or 0.5-0.75 wt.%. The core is removed by a thermal treatment at >= 300[deg] C. An independent claim is included for a method for the production of foundry core.
IPC 8 full level
CPC (source: EP)
B22C 1/183 (2013.01); B22C 1/2246 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
DE 102008056856 A1 20100520; EP 2204246 A2 20100707; EP 2204246 A3 20120104; EP 2204246 B1 20181003
DOCDB simple family (application)
DE 102008056856 A 20081112; EP 09175206 A 20091106