(19)
(11) EP 2 316 593 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.01.2012 Bulletin 2012/03

(43) Date of publication A2:
04.05.2011 Bulletin 2011/18

(21) Application number: 10188114.2

(22) Date of filing: 19.10.2010
(51) International Patent Classification (IPC): 
B22C 7/02(2006.01)
B22C 9/24(2006.01)
 B22C 9/04(2006.01)
(84) Designated Contracting States:
AL 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 RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 28.10.2009 US 589801

(71) Applicant: Howmet Corporation
Whitehall, MI 49461-1895 (US)

(72) Inventor:
  • Grunstra, Robert E.
    Spring Lake, MI 49456 (US)

(74) Representative: Hoeger, Stellrecht & Partner Patentanwälte 
Uhlandstrasse 14c
70182 Stuttgart
70182 Stuttgart (DE)

   


(54) Fugitive core tooling and method


(57) A ceramic core is produced by introducing a fluid ceramic core material, such as a ceramic slurry, into a core-shaped cavity formed at least in part by one or more fugitive core tooling liners residing in a back-up body, removing the ceramic core from the cavity, and removing the one or more fugitive tooling liners from the back-up die body and discarding them. The fugitive tooling liners and optional tooling inserts are used in one or more production cycles (e.g. ceramic slurry injection cycle) to make a single or multiple ceramic cores and then replaced with fresh (un-used) tooling liners and optional inserts to make other ceramic cores.







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