EP 0424621 B1 19930317 - METHOD FOR MANUFACTURING A PLATE FOR SLIDING GATE VALVE USED IN METALLURGY
Title (en)
METHOD FOR MANUFACTURING A PLATE FOR SLIDING GATE VALVE USED IN METALLURGY
Publication
Application
Priority
DE 3935482 A 19891025
Abstract (en)
[origin: EP0424621A1] The invention relates to a method of manufacturing a plate for a sliding gate valve arranged at the outlet of a vessel intended for holding molten metal, in which a plate body (3) of refractory material is surrounded with a heated steel collar (1) and the latter is allowed to shrink onto a circumferential surface (2) of the plate body by cooling. To avoid cracks in the plate body, e.g. during initial casting, the collar used according to the invention is of a steel grade, an excess length (equals the difference between the outside diameter of the plate to the inside diameter of the cold collar) and of a wall thickness such that the compressive stresses which occur in the plate material during shrink fitting, though lower than the compressive strength of the plate material, are higher than the tensile stresses to be expected in the plate material due to the thermal shock loading of the plate body upon initial casting. <IMAGE>
IPC 1-7
IPC 8 full level
B22D 11/10 (2006.01); B22D 41/28 (2006.01); B22D 41/30 (2006.01)
CPC (source: EP)
B22D 41/30 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0424621 A1 19910502; EP 0424621 B1 19930317; AT E86899 T1 19930415; DE 3935482 C1 19900927; DE 59001044 D1 19930422; DK 0424621 T3 19930517; ES 2040536 T3 19931016; GR 3007462 T3 19930730; JP H03165965 A 19910717
DOCDB simple family (application)
EP 90115486 A 19900811; AT 90115486 T 19900811; DE 3935482 A 19891025; DE 59001044 T 19900811; DK 90115486 T 19900811; ES 90115486 T 19900811; GR 930400649 T 19930324; JP 26656690 A 19901005