EP 0819485 B1 20020619 - Method, apparatus and shell mould for casting a cylindrical product
Title (en)
Method, apparatus and shell mould for casting a cylindrical product
Title (de)
Verfahren, Vorrichtung und Feingiessform zum Giessen zylindrischer Gegenstände
Title (fr)
Procédé, dispositif et moule pour la moulée des pièces cylindriques
Publication
Application
Priority
EP 96111597 A 19960718
Abstract (en)
[origin: EP0819485A1] A shell mold includes a plurality of sleeve forming portions. Of the sleeve forming portions, at least an endmost sleeve forming portion located adjacent to a subrunner portion has a modified shape for compensating for deformation of cast sleeves caused by solidification and contraction of molten metal. A shell molding apparatus includes an upper die and a lower die which constitute a die set for molding a shell mold. The lower die is composed of shell molding inserts, each having the shape of a halved cylinder, spiny insert receiving recesses formed in the shell molding inserts, and spiny inserts (22) retractably provided in the spiny insert receiving recesses. In a casting method using a shell mold, many protrusions of a spiny insert are reversely copied to the inner surface of a halved shell mold at the undercut portion of the inner surface, thereby forming many depressions at the undercut portion. The halved shell mold is parted form the lower die. A plurality of bore forming cores are disposed in the halved shell mold. The halved shell mold and another halved shell mold are engaged with each other, thereby forming a shell mold for casting. Casting is performed using the thus formed shell mold. <IMAGE>
IPC 1-7
IPC 8 full level
B22C 7/00 (2006.01)
CPC (source: EP)
B22C 7/005 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0819485 A1 19980121; EP 0819485 B1 20020619; DE 69621922 D1 20020725; DE 69621922 T2 20030130
DOCDB simple family (application)
EP 96111597 A 19960718; DE 69621922 T 19960718