EP 2344289 B1 20120815 - METHOD FOR PRODUCING A MOLDED PART PROVIDED WITH A THROUGH-HOLE AND DEVICE FOR CARRYING OUT THE METHOD
Title (en)
METHOD FOR PRODUCING A MOLDED PART PROVIDED WITH A THROUGH-HOLE AND DEVICE FOR CARRYING OUT THE METHOD
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES MIT EINEM DURCHGEHENDEN LOCH VERSEHENEN FORMTEILS UND VORRICHTUNG ZUR DURCHFÜHRUNG DES VERFAHRENS
Title (fr)
PROCÉDÉ DE FABRICATION D'UNE PIÈCE MOULÉE POURVUE D'UN TROU TRAVERSANT ET DISPOSITIF POUR LA MISE EN OUEVRE DU PROCÉDÉ
Publication
Application
Priority
- CH 2009000316 W 20091002
- CH 16072008 A 20081010
Abstract (en)
[origin: WO2010040238A1] In order to produce a molded part provided with a through-hole, a rod-shaped blank (R) is pushed forward coaxially through a guide (1) by a defined length into a cavity (2) and then fixed in place. Then the end region of the blank (R) is axially compressed using a swage (3) and reshaped into a disk (S) delimited by the die (2). Thereafter, in a penetration step, a disk core (KS) having the same cross-sectional shape as the blank (R) is ejected out of the disk (S) using a punch (31) and pushed into the guide (1) and moved back together with the unshaped part of the blank. Then, the penetrated disk (S) is severed from the disk core (KS) and the molded part is removed from the cavity (2). During the penetration step, the disk (S) present in the cavity (2) is subjected to an axial pressure (FNH) in the disk core ejection direction and the blank (R) is subjected to an axial counter-force (FG) opposite to the disk core ejection direction. In this way, the tensile or shearing stresses occurring in the disk are compensated by the superposition of compressive stress, and the formation of fractures, burrs or other deformations on the inner contour of the molded part are prevented.
IPC 8 full level
CPC (source: EP KR US)
B21K 1/04 (2013.01 - EP KR US); B21K 1/28 (2013.01 - KR); B21K 1/761 (2013.01 - EP KR US)
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 2010040238 A1 20100415; CH 699706 A1 20100415; CN 102216000 A 20111012; CN 102216000 B 20151209; EA 019548 B1 20140430; EA 201100591 A1 20111031; EP 2344289 A1 20110720; EP 2344289 B1 20120815; ES 2391710 T3 20121129; JP 2012505078 A 20120301; JP 5421996 B2 20140219; KR 101343157 B1 20131219; KR 20110067032 A 20110620; UA 98890 C2 20120625; US 2011193257 A1 20110811; US 9120142 B2 20150901
DOCDB simple family (application)
CH 2009000316 W 20091002; CH 16072008 A 20081010; CN 200980139966 A 20091002; EA 201100591 A 20091002; EP 09775793 A 20091002; ES 09775793 T 20091002; JP 2011530344 A 20091002; KR 20117007893 A 20091002; UA A201104179 A 20091002; US 200913122648 A 20091002