EP 3097299 A1 20161130 - METHOD FOR PRODUCING A PISTON FOR A COMBUSTION ENGINE
Title (en)
METHOD FOR PRODUCING A PISTON FOR A COMBUSTION ENGINE
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES KOLBENS FÜR EINEN VERBRENNUNGSMOTOR
Title (fr)
PROCÉDÉ DE FABRICATION D'UN PISTON DESTINÉ À UN MOTEUR À COMBUSTION INTERNE
Publication
Application
Priority
- DE 102013226717 A 20131219
- EP 2014077431 W 20141211
Abstract (en)
[origin: WO2015091217A1] The invention relates to a method for producing a piston (1) with a combustion bowl (2), comprising the fastening of an annular fibrous preform (3) with a shape which is suitable for reinforcing the edge of the combustion bowl (2) in a casting mould for the piston (1) coaxially with respect to the piston axis (10) in the plane of the piston head (5), the introduction of a metallic melt into the casting mould in order to produce the piston blank, the generation of a pressure difference between the melt and the fibrous preform (3) for the infiltration of the melt into the fibrous preform (3), and the machining of the piston blank by means of a chip-removing manufacturing method for finishing the piston (1), wherein the pressure difference between the melt and the fibrous preform (3) is caused by the fibrous preform (3) being held in the casting mould by suction tubes (10, 11), wherein a vacuum prevails in the suction tubes (10, 11) which is such that the melt is sucked into the fibrous preform (3) by it and infiltrates the fibrous preform (3). An optimized solidifying behaviour arises if at least one section (13, 14) of at least one of the suction tubes (10, 11) accelerates the solidification of the melt which enters the suction tube (10, 11).
IPC 8 full level
B22D 19/00 (2006.01); B22D 19/14 (2006.01); F02B 23/06 (2006.01); F02F 3/00 (2006.01); F02F 3/28 (2006.01)
CPC (source: EP US)
B22C 9/24 (2013.01 - EP US); B22D 18/06 (2013.01 - EP US); B22D 19/0027 (2013.01 - EP US); B22D 19/14 (2013.01 - EP US); B22D 21/007 (2013.01 - EP US); F02B 23/0603 (2013.01 - EP US); F02F 3/00 (2013.01 - EP US); F02F 3/0084 (2013.01 - US); F02F 3/285 (2013.01 - EP US); F16J 1/01 (2013.01 - US); Y02T 10/12 (2013.01 - EP US)
Citation (search report)
See references of WO 2015091217A1
Designated contracting state (EPC)
AL 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 RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2015091217 A1 20150625; CN 105849400 A 20160810; DE 102013226717 A1 20150625; EP 3097299 A1 20161130; JP 2017500485 A 20170105; US 2017028464 A1 20170202
DOCDB simple family (application)
EP 2014077431 W 20141211; CN 201480071465 A 20141211; DE 102013226717 A 20131219; EP 14824796 A 20141211; JP 2016540988 A 20141211; US 201415106302 A 20141211