EP 3740332 A1 20201125 - METHOD FOR PRODUCING A CERAMIC CORE FOR THE PRODUCTION OF A CASTING HAVING HOLLOW STRUCTURES AND CERAMIC CORE
Title (en)
METHOD FOR PRODUCING A CERAMIC CORE FOR THE PRODUCTION OF A CASTING HAVING HOLLOW STRUCTURES AND CERAMIC CORE
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES KERAMISCHEN KERNS FÜR DAS HERSTELLEN EINES GUSSTEILS MIT HOHLRAUMSTRUKTUREN SOWIE KERAMISCHER KERN
Title (fr)
PROCÉDÉ DE FABRICATION D'UN NOYAU CÉRAMIQUE DESTINÉ À LA FABRICATION D'UNE PIÈCE COULÉE DOTÉE DE STRUCTURES CREUSES, ET NOYAU CÉRAMIQUE
Publication
Application
Priority
- DE 102018200705 A 20180117
- EP 2019051169 W 20190117
Abstract (en)
[origin: WO2019141783A1] The invention relates to a method for producing a ceramic core (4, 4'), and to a core produced by means of said method, for preparing the production of a casting having hollow structures, which is designed to form the ceramic core, using a 3D model of digital gemetric coordinates of the casting, said method comprising the following steps: a) producing, by casting, at least one first sub-region (4) of the ceramic core including at least one first joining structure (24) in a surface of the sub-region; b) producing, by casting or by 3D printing, at least one second sub-region (4') of the ceramic core including at least one second joining structure (26) complementary to the first joining structure, in a surface of the sub-region, the production by casting comprising the following steps: i. pressureless or low-pressure casting of a ceramic core blank, with an oversize in relation to the core (4, 4') according to the geometric coordinates; ii. CNC-machining of the core (4, 4') according to the 3D model in a first CNC-machining method; and c) joining the at least one first and at least one second sub-region of the core, with the complementary joining structures, to form the core according to geometric coordinates of the casting.
IPC 8 full level
B22C 7/02 (2006.01); B22C 9/04 (2006.01); B22C 9/10 (2006.01); B22C 9/18 (2006.01); B28B 7/28 (2006.01); B28B 11/08 (2006.01)
CPC (source: EP US)
B22C 7/02 (2013.01 - EP); B22C 9/043 (2013.01 - EP); B22C 9/103 (2013.01 - EP US); B22C 9/108 (2013.01 - EP US); B22C 9/18 (2013.01 - EP US); B28B 1/001 (2013.01 - EP); B28B 7/342 (2013.01 - EP); B28B 11/002 (2013.01 - EP); B33Y 80/00 (2014.12 - US); Y02P 10/25 (2015.11 - EP)
Citation (search report)
See references of WO 2019141783A1
Designated contracting state (EPC)
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 state (EPC)
BA ME
DOCDB simple family (publication)
DE 102018200705 A1 20190718; EP 3740332 A1 20201125; US 2020338630 A1 20201029; WO 2019141783 A1 20190725
DOCDB simple family (application)
DE 102018200705 A 20180117; EP 19701592 A 20190117; EP 2019051169 W 20190117; US 201916962632 A 20190117