EP 1174200 B1 20060621 - Casting process and core to be used therein
Title (en)
Casting process and core to be used therein
Title (de)
Giessverfahren und Giesskern für die Verwendung in diesem Verfahren
Title (fr)
Procédé de coulée et noyau utilisé dans ce procédé
Publication
Application
Priority
DE 10035202 A 20000720
Abstract (en)
[origin: EP1174200A2] Process for casting a component from a light metal having; (i) a casting core consisting of a matrix infiltrated with infiltration channels comprises a docking phase in which a liquid melt enters the intermediate space between the core and a shell surrounding the core; (ii) an infiltration phase in which the liquid melt penetrates the infiltration channels in the edge zone of the core under reduced pressure; (iii) a cooling phase in which the melt is converted into a thixotropic state; and (iv) a pressure phase in which the thixotropic melt is placed under pressure to prevent solidification porosity in the cast workpiece. An Independent claim is also included for a casting core. Preferred Features: The material regions of the matrix limiting the infiltration channels are made from a light but dense material to prevent penetration by the melt. The size of the space of the infiltration channels in the core is at least three to five times greater than the diameter of the crystal body of the light metal used for the melt. The matrix consists of porous mineral spheres joined together at contact surfaces and having a diameter between 1 and 8 mm.
IPC 8 full level
B22D 19/14 (2006.01); B22D 17/00 (2006.01); B22D 19/00 (2006.01); C22C 1/10 (2006.01)
CPC (source: EP)
B22D 17/007 (2013.01); B22D 19/14 (2013.01); C22C 1/1021 (2023.01); C22C 1/1036 (2013.01); C22C 1/1073 (2023.01); B22F 2999/00 (2013.01)
Designated contracting state (EPC)
AT BE CH DE ES FR GB IT LI NL
DOCDB simple family (publication)
EP 1174200 A2 20020123; EP 1174200 A3 20031001; EP 1174200 B1 20060621; AT E330736 T1 20060715; DE 10035202 A1 20020131; DE 50110214 D1 20060803; ES 2266055 T3 20070301
DOCDB simple family (application)
EP 01117615 A 20010717; AT 01117615 T 20010717; DE 10035202 A 20000720; DE 50110214 T 20010717; ES 01117615 T 20010717