Global Patent Index - EP 1483074 A1

EP 1483074 A1 2004-12-08 - SEALING RING AND PISTON FOR A PRESSURE DIE CASTING CYLINDER

Title (en)

SEALING RING AND PISTON FOR A PRESSURE DIE CASTING CYLINDER

Title (de)

DICHTRING UND KOLBEN FÜR EINEN DRUCKGIESSZYLINDER

Title (fr)

BAGUE D'ETANCHEITE ET PISTON POUR UN CYLINDRE DE COULEE SOUS PRESSION

Publication

EP 1483074 A1 (DE)

Application

EP 02727355 A

Priority

EP 0202356 W

Abstract (en)

[origin: WO03074211A2] Es wird ein Kolben für eine Kaltkammer-Druckgiessmaschine vorgeschlagen, in deren Giesszylinder (3) der Kolben (1) axial verschiebbar eine Druckkammer (5) für Metallschmelze begrenzt. Der Kolben (1) hat einen Kolbenkörper (7) und einen im Bereich der druckkammerseitigen Kolbenstirn in einer äusseren Ringaussparung (19) des Kolbenkörpers (7) fixierten Dichtring (17). Der Kolbenkörper (7) steht druckkammerseitig über den Dichtring axial vor und übergreift den dichtring über Teil seiner radialen Dicke druckkammerseitig radial. Der Kolbenkörper (7) ist zumindest im Bereich seiner Kolbenstirn (15) kühlbar. Der Dichtring (17) ist mit raidialem und axialem Spiel beweglich in der Ringaussparung (19) angeordnet. Ein Vorsprung (43) des Kolbenkörpers (7), der den Dichtring (17) raidal übergreift, begrenzt mit seiner äusseren Umfangsfläche (45) zwischen sich und dem Giesszylinder einen Ringspalt (47), der im Giessbetrieb auf Erstarrungstemperatur kühlbar ist. Die in dem Ringspalt (47) erstarrende Schmelze dichtet den Dichtring (17) zusätzlich ab und verhindert, dass Schmelze in das Bewegungsspiel des Dichtrings (17) oder zwischen den Dichtring (17) und den Giesszylinder (3) gelangt. Der Verschleiss des Dichtrings (17) kann auf diese Weise vermindert werden.

IPC 1-7 (main, further and additional classification)

B22D 17/20

IPC 8 full level (invention and additional information)

B22D 17/20 (2006.01)

CPC (invention and additional information)

B22D 17/203 (2013.01)

Citation (search report)

See references of WO 03074214A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

EPO simple patent family

WO 03074211 A2 20030912; WO 03074211 A3 20040610; AT 364464 T 20070715; AU 2002257612 A1 20030916; AU 2002358495 A1 20030916; AU 2002358495 A8 20030916; DE 50210331 D1 20070726; EP 1483074 A1 20041208; EP 1483074 B1 20070613; EP 1483075 A2 20041208; ES 2287274 T3 20071216; WO 03074214 A1 20030912

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