EP 0394988 A3 19910814 - CONFIGURATION OF AN INJECTION PISTON INCLUDING PISTON ROD IN DIE CASTING MACHINES
Title (en)
CONFIGURATION OF AN INJECTION PISTON INCLUDING PISTON ROD IN DIE CASTING MACHINES
Publication
Application
Priority
- DE 3913494 A 19890425
- DE 3913559 A 19890425
Abstract (en)
[origin: EP0394988A2] The invention relates to a configuration of the injection piston including piston rod on die casting machines, the configuration allowing lubrication of the outer circumferential surface of the injection piston, in particular towards the end of the die-filling phase. In all known designs, there was no guarantee that lubrication would take place, particularly towards the end of the die-filling phase within the casting chamber. To achieve this is, however, the aim of the present invention and is achieved by the fact that a lubricant chamber (1, 1a or 1') is arranged within the rod (3) of the injection piston or within the injection piston (2) itself, it being possible to fill the chamber with lubricant on the inflow side via a lubricant line (4 or 4a, 4d) run through the piston rod (3, 3a, 3b), it being possible to seal off the inflow to the lubricant chamber (1, 1a or 1') and to the lubricant line (4 or 4a, 4d) by a nonreturn valve (5, 5'), that the lubricant chamber (1) is connected on the outflow side, via lubricant lines (4a, 4b) and holes (6) or - when the lubricant chamber (1') is arranged within the injection piston (2) - directly via holes (6), to the circumferential surface (2a) of the injection piston (2) and that the lubricant chamber (1, 1') can be compressed at the end of the die-filling phase, the lubricant reaching the circumferential surface (2a) in the process. <IMAGE>
IPC 1-7
IPC 8 full level
B22D 17/20 (2006.01); B29C 45/83 (2006.01); F16N 7/14 (2006.01)
CPC (source: EP)
B22D 17/203 (2013.01); B22D 17/2038 (2013.01)
Citation (search report)
- [A] DE 1939227 U 19660526 - DRUCKGUSS HEIDENAU VEB [DE]
- [A] CH 436588 A 19670531 - KLUEBER LUBRICATION AUSTRIA GE [AT]
- [A] DE 3316951 A1 19831117 - TOKAI RIKA CO LTD [JP]
- [A] US 3767012 A 19731023 - JIMI Y, et al
Designated contracting state (EPC)
CH DE FR GB IT LI
DOCDB simple family (publication)
EP 0394988 A2 19901031; EP 0394988 A3 19910814; EP 0394988 B1 19941012; DE 59007420 D1 19941117
DOCDB simple family (application)
EP 90107821 A 19900425; DE 59007420 T 19900425