EP2552623B1 - Method and device for casting a piston for an internal combustion engine - Google Patents

Method and device for casting a piston for an internal combustion engine Download PDF

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Publication number
EP2552623B1
EP2552623B1 EP11710776.3A EP11710776A EP2552623B1 EP 2552623 B1 EP2552623 B1 EP 2552623B1 EP 11710776 A EP11710776 A EP 11710776A EP 2552623 B1 EP2552623 B1 EP 2552623B1
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EP
European Patent Office
Prior art keywords
piston
region
casting
pin bores
withdrawn
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP11710776.3A
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German (de)
French (fr)
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EP2552623A1 (en
Inventor
Silvio Stephan
Isabella Sobota
Rolf Pfeifer
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Federal Mogul Nuernberg GmbH
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Federal Mogul Nuernberg GmbH
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Publication of EP2552623A1 publication Critical patent/EP2552623A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D25/00—Special casting characterised by the nature of the product
    • B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B22C9/101—Permanent cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
    • B22D15/02—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of cylinders, pistons, bearing shells or like thin-walled objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F2200/00—Manufacturing
    • F02F2200/06—Casting

Definitions

  • the invention relates to a method and an apparatus for casting a piston for an internal combustion engine.
  • the strength of the so-called piston pin bores, in which the piston pin is received for connection to a connecting rod, is of particular importance.
  • the required strength can be achieved in particular by rapid quenching of the casting. According to the current procedure, such quenching takes place only outside the mold, when the entire piston is solidified so far that it can be removed from the so-called mold.
  • the DE 10 2005 027 540 A1 relates to a method for producing a piston for internal combustion engines, wherein the mold is opened before the melt is solidified in the region of a feeder. Subsequently, the piston can be removed and cooled outside the mold.
  • the WO 2008/128153 A1 relates to a device and a method for casting a piston, in which two collapsible mold halves and two cores are present.
  • the invention has for its object to provide a method and apparatus for casting pistons for internal combustion engines, with which the strength can be improved, in particular in the area of the piston pin holes.
  • At least one sleeve provided there is already retracted after an edge-layer solidification in the region of at least one piston pin bore, and this region is cooled by coolant supplied by at least one sleeve (14).
  • the area of the piston pin bores in particular the largely cylindrical inner surface thereof, can be cooled and quenched more quickly than is possible with the current procedure, so that the strength in these areas is advantageously increased.
  • only a certain surface layer solidification must be awaited, which makes it possible to withdraw a quill provided there, without jeopardizing the shape of the piston in this area.
  • a quill is essentially a substantially cylindrical or slightly conical casting core, which effectively keeps the space later provided for the piston pin during casting, and around which the material surrounding the later piston pin bore is thus formed.
  • the notion of the piston pin bore is to emphasize that this need not necessarily be formed by drilling as a procedural approach. Rather, it is usually two substantially cylindrical openings, in which the two ends of a piston pin are received, while therebetween in the installed state, the connecting rod.
  • the material bypassing the piston pin bores can thus be cooled and quenched more quickly by the procedure according to the invention than was hitherto possible, so that a faster and directional solidification is possible, which leads to increased strength.
  • the solidification speed of the piston material is increased, in particular in the area of the piston pin bores, which leads to quenching and increased strength.
  • a directional solidification can be generated.
  • the cooling to a reduced extent can be done by the supply of coolant, in particular compressed air through exactly one quill.
  • Fig. 1 schematically shown in section casting device 20 for a piston 10 has various elements that initially define the outer shape of the piston. This applies to the tool part 22 in the region of the piston crown, the tool parts 24 in the region of the piston skirt and a so-called fixing ring 26 in the region of the underside of the piston.
  • two sleeves 14 are provided in the embodiment shown, which are slightly conical.
  • there is a core 16 which extends into the area above the pin bores 12 and against which the sleeves are located.
  • Fig. 2 is shown after a first boundary layer solidification, which takes place in particular in the piston pin holes 12, at least one sleeve 14, in the embodiment shown, both sleeves 14, retracted to expose the region of the piston pin holes 12 in particular on the inside thereof. According to the invention, a targeted cooling of these inner surfaces takes place subsequently.
  • the preferred approach is to retract the core 16 to expose also the inner surfaces in the area between the piston pin bores that have hitherto been applied to the core 16 and also to effect cooling and quenching, even before the piston as a whole the casting device or mold can be removed from the mold.
  • the cooling of the area between the piston pin bores is effected only by a quill 14.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Description

Technisches GebietTechnical area

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Gießen eines Kolbens für einen Verbrennungsmotor.The invention relates to a method and an apparatus for casting a piston for an internal combustion engine.

Stand der TechnikState of the art

Bei Kolben von Verbrennungsmotoren ist die Festigkeit der so genannten Kolbenbolzenbohrungen, in denen der Kolbenbolzen zur Verbindung mit einem Pleuel aufgenommen ist, von besonderer Wichtigkeit. Die erforderliche Festigkeit kann insbesondere durch eine schnelle Abschreckung des Gusses erfolgen. Nach der derzeitigen Vorgehensweise erfolgt ein derartiges Abschrecken erst außerhalb der Kokille, wenn der gesamte Kolben soweit erstarrt ist, dass er aus der so genannten Kokille entformt werden kann.In pistons of internal combustion engines, the strength of the so-called piston pin bores, in which the piston pin is received for connection to a connecting rod, is of particular importance. The required strength can be achieved in particular by rapid quenching of the casting. According to the current procedure, such quenching takes place only outside the mold, when the entire piston is solidified so far that it can be removed from the so-called mold.

Die DE 10 2005 027 540 A1 betrifft ein Verfahren zur Herstellung eines Kolbens für Verbrennungsmotoren, bei dem die Gießform geöffnet wird, bevor die Schmelze im Bereich eines Speisers erstarrt ist. Nachfolgend kann der Kolben entnommen und außerhalb der Gießform gekühlt werden.The DE 10 2005 027 540 A1 relates to a method for producing a piston for internal combustion engines, wherein the mold is opened before the melt is solidified in the region of a feeder. Subsequently, the piston can be removed and cooled outside the mold.

Die WO 2008/128153 A1 betrifft eine Vorrichtung und ein Verfahren zum Gießen eines Kolbens, bei dem zwei zusammenschiebbare Formhälften und zwei Kerne vorhanden sind.The WO 2008/128153 A1 relates to a device and a method for casting a piston, in which two collapsible mold halves and two cores are present.

Aus der DE 10 2007 012846 B3 geht ein innengekühlter Gießkern für einen Kolben hervor.From the DE 10 2007 012846 B3 An internally cooled casting core for a piston emerges.

Gemäß der DE 103 59 066 A1 wird ein Teil einer Gießform gekühlt.According to the DE 103 59 066 A1 a part of a casting mold is cooled.

Schließlich betrifft die US 2007/277952 eine Vorrichtung, bei der bestimmte Abschnitte eines Gussteils schnell gekühlt und verfestigt werden können.Finally, the concerns US 2007/277952 a device in which certain sections of a casting can be cooled and solidified quickly.

Darstellung der ErfindungPresentation of the invention

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zum Gießen von Kolben für Verbrennungsmotoren zu schaffen, mit denen die Festigkeit insbesondere im Bereich der Kolbenbolzenbohrungen verbessert werden kann.The invention has for its object to provide a method and apparatus for casting pistons for internal combustion engines, with which the strength can be improved, in particular in the area of the piston pin holes.

Die Lösung dieser Aufgabe erfolgt zum einen durch das im Anspruch 1 beschriebene Verfahren.The solution of this object is achieved on the one hand by the method described in claim 1.

Demzufolge wird bereits nach einer Randschichterstarrung im Bereich zumindest einer Kolbenbolzenbohrung zumindest eine dort vorgesehene Pinole zurückgezogen und dieser Bereich durch durch zumindest eine Pinole (14) zugeführtes Kühlmittel gekühlt. Hierdurch kann der Bereich der Kolbenbolzenbohrungen, insbesondere die weitgehend zylindrische Innenfläche derselben schneller gekühlt und abgeschreckt werden, als dies bei der derzeitigen Vorgehensweise möglich ist, so dass die Festigkeit in diesen Bereichen in vorteilhafter Weise erhöht wird. Hierzu muss lediglich eine gewisse Randschichterstarrung abgewartet werden, die es ermöglicht, eine dort vorgesehene Pinole zurückzuziehen, ohne die Form des Kolbens in diesem Bereich zu gefährden. Bei einer Pinole handelt es sich im Wesentlichen um einen weitgehend zylindrischen oder leicht konischen Gießkern, der beim Gießen gewissermaßen den später für den Kolbenbolzen vorgesehenen Raum freihält und um den herum somit das die spätere Kolbenbolzenbohrung umgebende Material geformt wird. Zum Begriff der Kolbenbolzenbohrung ist zu betonen, dass diese nicht notwendigerweise durch Bohren als verfahrensmäßige Vorgehensweise ausgebildet sein muss. Vielmehr handelt es sich um üblicherweise zwei im Wesentlichen zylindrische Öffnungen, in denen die beiden Enden eines Kolbenbolzens aufgenommen werden, während sich dazwischen im Einbauzustand das Pleuel befindet.As a result, at least one sleeve provided there is already retracted after an edge-layer solidification in the region of at least one piston pin bore, and this region is cooled by coolant supplied by at least one sleeve (14). In this way, the area of the piston pin bores, in particular the largely cylindrical inner surface thereof, can be cooled and quenched more quickly than is possible with the current procedure, so that the strength in these areas is advantageously increased. For this purpose, only a certain surface layer solidification must be awaited, which makes it possible to withdraw a quill provided there, without jeopardizing the shape of the piston in this area. A quill is essentially a substantially cylindrical or slightly conical casting core, which effectively keeps the space later provided for the piston pin during casting, and around which the material surrounding the later piston pin bore is thus formed. The notion of the piston pin bore is to emphasize that this need not necessarily be formed by drilling as a procedural approach. Rather, it is usually two substantially cylindrical openings, in which the two ends of a piston pin are received, while therebetween in the installed state, the connecting rod.

Das die Kolbenbolzenbohrungen umgehende Material kann durch die erfindungsgemäße Vorgehensweise somit schneller gekühlt und abgeschreckt werden, als dies bislang möglich ist, so dass eine schnellere und gerichtetere Erstarrung möglich ist, was zu einer erhöhten Festigkeit führt. Mit anderen Worten wird die Erstarrungsgeschwindigkeit des Kolbenmaterials insbesondere im Bereich der Kolbenbolzenbohrungen erhöht, was zu einem Abschrecken und einer erhöhten Festigkeit führt. Ferner kann durch die beschriebene Vorgehensweise auch in anderen Bereichen des Kolbens eine gerichtete Erstarrung erzeugt werden.The material bypassing the piston pin bores can thus be cooled and quenched more quickly by the procedure according to the invention than was hitherto possible, so that a faster and directional solidification is possible, which leads to increased strength. In other words, the solidification speed of the piston material is increased, in particular in the area of the piston pin bores, which leads to quenching and increased strength. Furthermore, by the described procedure also in other areas of the piston a directional solidification can be generated.

Bevorzugte Weiterbildungen des erfindungsgemäßen Verfahrens sind in den weiteren Ansprüchen beschrieben.Preferred developments of the method according to the invention are described in the further claims.

Es wird derzeit bevorzugt, die Kühlung der Kolbenbolzenbohrungen mittels Druckluft vorzunehmen. Die hierfür erforderlichen Druckluftleitungen können, so haben erste Überlegungen ergeben, für sämtliche Größen von Kolben, insbesondere Dieselkolben vorgesehen werden.It is currently preferred to make the cooling of the piston pin bores by means of compressed air. The compressed air lines required for this purpose can, as first considerations have shown, be provided for all sizes of pistons, in particular diesel pistons.

Besonders bevorzugt wird derzeit, zwei Pinolen gleichzeitig zurückzuziehen und den Bereich der Kolbenbolzenbohrungen durch gleichzeitig durch die beiden Pinolen zugeführtes Kühlmittel zu kühlen.At present, it is particularly preferred to retract two sleeves simultaneously and to cool the region of the piston pin bores by means of coolant supplied simultaneously by the two sleeves.

Es hat sich ferner als vorteilhaft erwiesen, einen zwischen den Kolbenbolzenbohrungen vorgesehenen Kern zurückziehbar zu gestalten. Dadurch kann insbesondere nach einer ersten Kühlung des Bereichs der Kolbenbolzenbohrungen, bevorzugt in vermindertem Umfang, weiterhin Kühlmittel, insbesondere Druckluft, zugeführt werden, so dass auch der Bereich zwischen den Kolbenbolzenbohrungen gekühlt werden kann. Mit anderen Worten wird das bis zum Zurückziehen des Kerns an diesem Kern anliegende Material gekühlt, um auch hier eine erhöhte Festigkeit zu realisieren.It has also proved to be advantageous to make retractable a provided between the piston pin bores core. As a result, in particular after a first cooling of the area of the piston pin bores, preferably to a lesser extent, further coolant, in particular compressed air, can be supplied, so that the area between the piston pin bores can also be cooled. In other words, the up to the retraction of the core is applied to this core adjacent material to realize here also increased strength.

Die Kühlung in vermindertem Umfang kann durch die Zuführung von Kühlmittel, insbesondere Druckluft durch genau eine Pinole erfolgen.The cooling to a reduced extent can be done by the supply of coolant, in particular compressed air through exactly one quill.

Insbesondere hat es sich als vorteilhaft herausgestellt, Kühlmittel zunächst durch zwei Pinolen zuzuführen und nachfolgend, nachdem ein Kern zurückgezogen wurde, lediglich durch genau eine Pinole zuzuführen. Hierdurch wird ein besonders effizientes Durchströmen des Bereichs zwischen den Kolbenbolzenbohrungen mit Kühlmittel bewirkt.In particular, it has been found to be advantageous to supply coolant first through two sleeves and subsequently, after a core has been withdrawn, to supply it only by means of exactly one sleeve. This causes a particularly efficient flow through the area between the piston pin holes with coolant.

Die Lösung der oben genannten Aufgabe erfolgt ferner durch die im Anspruch 7 beschriebene Gießvorrichtung, die entsprechend dem erfindungsgemäßen Verfahren zumindest eine aus dem Bereich einer Kolbenbolzenbohrung zurückziehbare Pinole, durch die ein Kühlmittel zum Kühlen des Bereichs der Kolbenbolzenbohrungen zuführbar ist. Durch eine derartige Vorrichtung können die oben genannten Vorteile erreicht werden. Die bevorzugten Ausführungsformen der erfindungsgemäßen Vorrichtung entsprechen den vorangehend beschriebenen Verfahrensmerkmalen.The solution of the above object is further achieved by the casting apparatus described in claim 7, which according to the inventive method at least one retractable from the range of a piston pin bore quill, through which a coolant for cooling the region of the piston pin holes can be fed. By such a device, the above advantages can be achieved. The preferred embodiments of the device according to the invention correspond to the method features described above.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Nachfolgend wird ein bevorzugtes Ausführungsbeispiel der Erfindung näher erläutert. Es zeigen:

Fig. 1
eine schematische Schnittansicht einer Gießvorrichtung mit einem gegossenen Kolben während einer ersten Erstarrungsphase;
Fig. 2
eine schematische Schnittansicht nach dem Zurückziehen der Pinolen;
Fig. 3
eine schematische Schnittansicht beim Zuführen von Druckluft durch die Pinolen; und
Fig. 4
eine schematische Schnittansicht nach dem Zurückziehen eines Werkzeugkerns.
Hereinafter, a preferred embodiment of the invention will be explained in more detail. Show it:
Fig. 1
a schematic sectional view of a casting apparatus with a cast piston during a first solidification phase;
Fig. 2
a schematic sectional view after retraction of the sleeves;
Fig. 3
a schematic sectional view when supplying compressed air through the sleeves; and
Fig. 4
a schematic sectional view after retraction of a tool core.

Ausführliche Beschreibung einer bevorzugten Ausführungsform der ErfindungDetailed description of a preferred embodiment of the invention

Die in Fig. 1 schematisch im Schnitt gezeigte Gießvorrichtung 20 für einen Kolben 10 weist verschiedene Elemente auf, die zunächst die Außenform des Kolbens definieren. Dies gilt für das Werkzeugteil 22 im Bereich des Kolbenbodens, die Werkzeugteile 24 im Bereich des Kolbenmantels sowie einen so genannten Fixierring 26 im Bereich der Unterseite des Kolbens. Um die mechanische Nachbearbeitung im Bereich der Kolbenbolzenbohrungen 12 möglichst gering zu halten und das Zurückziehen zu ermöglichen, sind bei der gezeigten Ausführungsform zwei Pinolen 14 vorgesehen, die leicht konisch ausgebildet sind. Ferner ist zum Freihalten des Bereichs zwischen den Kolbenbolzenbohrungen 12 für die spätere Aufnahme des Pleuels ein Kern 16 vorhanden, der bis in den Bereich oberhalb der Bolzenbohrungen 12 reicht, und an dem die Pinolen anliegen. Nachdem das Material für den Kolben 10 in flüssiger Form in die derart gestaltete Gießvorrichtung 20 eingefüllt wurde, erfolgt eine Erstarrung des Materials, ausgehend von den Randschichten.In the Fig. 1 schematically shown in section casting device 20 for a piston 10 has various elements that initially define the outer shape of the piston. This applies to the tool part 22 in the region of the piston crown, the tool parts 24 in the region of the piston skirt and a so-called fixing ring 26 in the region of the underside of the piston. In order to keep the mechanical reworking in the area of the piston pin bores 12 as low as possible and to enable the retraction, two sleeves 14 are provided in the embodiment shown, which are slightly conical. Furthermore, to keep the area between the piston pin bores 12 free for receiving the connecting rod later, there is a core 16 which extends into the area above the pin bores 12 and against which the sleeves are located. After the material for the piston 10 has been filled in liquid form into the casting device 20 designed in this way, a solidification of the material occurs, starting from the edge layers.

Wie in Fig. 2 gezeigt, wird nach einer ersten Randschichterstarrung, die insbesondere auch in den Kolbenbolzenbohrungen 12 stattfindet, zumindest eine Pinole 14, bei der gezeigten Ausführungsbeispiel beide Pinolen 14, zurückgezogen, um den Bereich der Kolbenbolzenbohrungen 12 insbesondere an der Innenseite derselben freizulegen. Erfingdungsgemäß erfolgt nachfolgend eine gezielte Kühlung dieser Innenflächen.As in Fig. 2 is shown after a first boundary layer solidification, which takes place in particular in the piston pin holes 12, at least one sleeve 14, in the embodiment shown, both sleeves 14, retracted to expose the region of the piston pin holes 12 in particular on the inside thereof. According to the invention, a targeted cooling of these inner surfaces takes place subsequently.

Wie in Fig. 3 gezeigt ist, wird dies bei dem dargestellten Ausführungsbeispiel durch die Zuführung von Druckluft durch die Pinolen 14 realisiert. Insbesondere weisen diese in dem gezeigten Fall zentrale Zuströmkanäle 28 auf. Durch die beschriebenen Kanäle 28 strömt Druckluft an die Innenflächen der Kolbenbolzenbohrungen 12, so dass diese gekühlt und abgeschreckt werden und nachfolgend eine erhöhte Festigkeit aufweisen.As in Fig. 3 is shown, this is realized in the illustrated embodiment by the supply of compressed air through the sleeves 14. In particular, these have in the case shown central inflow channels 28. Through the described channels 28 compressed air flows to the inner surfaces of the piston pin holes 12 so that they are cooled and quenched and subsequently have an increased strength.

In Fig. 4 ist die bevorzugte Vorgehensweise dahingehend gezeigt, dass nachfolgend der Kern 16 zurückgezogen wird, um auch die Innenflächen im Bereich zwischen den Kolbenbolzenbohrungen, die bislang an den Kern 16 anlagen, freizulegen und auch hier eine Kühlung und Abschreckung zu bewirken, noch bevor der Kolben insgesamt aus der Gießvorrichtung oder Kokille entformt werden kann. Bevorzugt erfolgt die Kühlung des Bereichs zwischen den Kolbenbolzenbohrungen nur durch eine Pinole 14.In Fig. 4 For example, the preferred approach is to retract the core 16 to expose also the inner surfaces in the area between the piston pin bores that have hitherto been applied to the core 16 and also to effect cooling and quenching, even before the piston as a whole the casting device or mold can be removed from the mold. Preferably, the cooling of the area between the piston pin bores is effected only by a quill 14.

Claims (9)

  1. Method for casting a piston (10) for an internal combustion engine, in which after surface layer solidification in the region of the piston-pin bores (12), at least one sleeve (14) provided there is withdrawn and the region of at least one piston-pin bore (12) is cooled by cooling agent supplied through at least one sleeve (14).
  2. Method according to claim 1, characterised in that cooling is effected by means of compressed air.
  3. Method according to claim 1 or 2, characterised in that two sleeves (14) are withdrawn at the same time, and the region of two piston-pin bores (12) is cooled by cooling agent supplied at the same time through the sleeves (14).
  4. Method according to one of claims 1 to 3, characterised in that after surface layer solidification in the region between the piston-pin bores (12), at least one core (16) is withdrawn, and the region between the piston-pin bores (12), preferably to a reduced extent, is cooled.
  5. Method according to one of claims 1 to 4, characterised in that a cooling agent, in particular air, is supplied first of all through two and subsequently through precisely one sleeve (14).
  6. Method according to one of claims 1 to 5, characterised in that a cooling agent, in particular air, is supplied first of all through two sleeves and subsequently, after one core has been withdrawn, only through precisely one sleeve (14), wherein the cooling agent flows through the region between the piston-pin bores (12).
  7. Device (20) for casting pistons (10) for internal combustion engines having at least one sleeve (14) which can be withdrawn from the region of a piston-pin bore (12) and through which a cooling agent can be supplied to cool the region of the piston-pin bores (12).
  8. Device according to claim 7, characterised in that a compressed air supply device is provided.
  9. Device according to one of claims 7 or 8, further having at least one core (16) which can be withdrawn from the region between the piston-pin bores (12).
EP11710776.3A 2010-03-26 2011-03-24 Method and device for casting a piston for an internal combustion engine Not-in-force EP2552623B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010003346A DE102010003346A1 (en) 2010-03-26 2010-03-26 Method and device for casting a piston for an internal combustion engine
PCT/EP2011/054530 WO2011117342A1 (en) 2010-03-26 2011-03-24 Method and device for casting a piston for an internal combustion engine

Publications (2)

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EP2552623A1 EP2552623A1 (en) 2013-02-06
EP2552623B1 true EP2552623B1 (en) 2017-06-21

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US (1) US8720528B2 (en)
EP (1) EP2552623B1 (en)
DE (1) DE102010003346A1 (en)
WO (1) WO2011117342A1 (en)

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DE102012103884A1 (en) * 2012-05-03 2013-11-07 Fritz Winter Eisengiesserei Gmbh & Co. Kg Method for casting a casting provided with at least one passage opening
US9943905B2 (en) * 2014-12-02 2018-04-17 Halliburton Energy Services, Inc. Heat-exchanging mold assemblies for infiltrated downhole tools
CN108453231B (en) * 2018-02-01 2020-07-24 浙江博德智能科技有限公司 Shape-following cold control mold and using method thereof

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WO2011117342A1 (en) 2011-09-29
US8720528B2 (en) 2014-05-13
US20130092341A1 (en) 2013-04-18
EP2552623A1 (en) 2013-02-06
DE102010003346A1 (en) 2011-09-29

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