EP 2379245 B1 20150708 - EXPANSION DUMMY BLOCK FOR EXTRUDING PRESS FOR HOLLOW BODIES
Title (en)
EXPANSION DUMMY BLOCK FOR EXTRUDING PRESS FOR HOLLOW BODIES
Title (de)
EXPANSIONSPRESSSCHEIBE FÜR EINE EXTRUSIONSPRESSE FÜR HOHLKÖRPER
Title (fr)
GRAIN DE POUSSÉE D'EXPANSION POUR PRESSE D'EXTRUSION POUR DES CORPS CREUX
Publication
Application
Priority
- EP 2009067889 W 20091223
- IT MI20082325 A 20081224
Abstract (en)
[origin: WO2010072824A1] An expansion dummy block for extruding press for hollow bodies is described, the press comprising a container with a hole in which the material (323) to be extruded is inserted and a mandrel (327) for centrally perforating said material (323). The dummy block tightly slides inside the hole of the container pushed by a punch(304), and comprises: an internal hole for containing the mandrel (327) and let it slide therein; a head adapted to be elastically deformed so as to expand into the external edge contacting the container hole, and to expand into the internal edge (325) towards the internal hole contacting the mandrel (327) due to the reaction force produced by the contact with the material (323) upon the thrust received from said punch(304), and to withdraw when the reaction force is exhausted.
IPC 8 full level
B21C 26/00 (2006.01); B21C 23/08 (2006.01)
CPC (source: EP)
B21C 23/085 (2013.01); B21C 26/00 (2013.01)
Designated contracting state (EPC)
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 SE SI SK SM TR
DOCDB simple family (publication)
WO 2010072824 A1 20100701; EP 2379245 A1 20111026; EP 2379245 B1 20150708; IT MI20082325 A1 20100625
DOCDB simple family (application)
EP 2009067889 W 20091223; EP 09803768 A 20091223; IT MI20082325 A 20081224