EP2422901B1 - Device for moulding cast iron in a mould - Google Patents

Device for moulding cast iron in a mould Download PDF

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Publication number
EP2422901B1
EP2422901B1 EP11177151.5A EP11177151A EP2422901B1 EP 2422901 B1 EP2422901 B1 EP 2422901B1 EP 11177151 A EP11177151 A EP 11177151A EP 2422901 B1 EP2422901 B1 EP 2422901B1
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EP
European Patent Office
Prior art keywords
mould
coolant
channel
cast iron
wall
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.)
Active
Application number
EP11177151.5A
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German (de)
French (fr)
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EP2422901A2 (en
EP2422901A3 (en
Inventor
Hans-Peter Puy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huppert Engineering & Co KG GmbH
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Huppert Engineering & Co KG GmbH
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Priority to PL11177151T priority Critical patent/PL2422901T3/en
Publication of EP2422901A2 publication Critical patent/EP2422901A2/en
Publication of EP2422901A3 publication Critical patent/EP2422901A3/en
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Publication of EP2422901B1 publication Critical patent/EP2422901B1/en
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C21/00—Flasks; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • 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
    • B22C9/061—Materials which make up the mould

Definitions

  • the present invention relates to an apparatus for casting cast iron in a mold having a multi-part metallic mold enclosing a sand mold into the cavity of which the molten cast iron is filled.
  • a device is out DE 699 23 214 T2 known.
  • a controlled cooling of the material after filling the sand mold is to be achieved in that the plurality of mold parts coolant-flowed cavities and these are acted upon by the coolant according to the desired cooling conditions.
  • the US 2005/0103407 A1 shows a mold for a cylinder head with a metallic molding and several sand moldings. After casting, the metallic molding is removed to quench the casting and the exposed portion of the casting is sprayed with cooling water and cooled in this manner.
  • the WO 00/27567 A1 shows an apparatus for casting cast iron in a mold with a multi-part metallic mold enclosing a sand mold, in the cavity of the molten cast iron is filled.
  • the object of the invention is to achieve not only a better cooling but also a better controllability of this cooling.
  • the controlled in this way solidification of the casting should enable the achievement of optimal, reproducible material and structural properties in the casting / component.
  • the two-part metallic mold 1 encloses a sand mold 3, in which the casting room or after ascending filling by gates 6, the casting is located.
  • This sand mold can be made in a conventional process such as croning, cold box or hot box processes.
  • In the inner wall of the mold 1 and in the outer wall of the sand mold 3 are formed, opposite each other in cross-section semicircular grooves, which complement each other to a channel 2, which extends helically from a coolant inlet 5 to a coolant outlet 8. It is understood that depending on the shape of mold and sand mold other courses of the coolant channel or space may be appropriate, such as a meandering course.
  • the primary cooling is carried out by a coolant channel 2 flowing through the coolant.
  • a coolant channel 2 flowing through the coolant.
  • preferably serves air or, when guided in a closed circuit, an inert gas.
  • this primary cooling is controlled accordingly, in particular on the amount and initial temperature, the flow rate and the pressure of the introduced coolant. Since this maximum reaches the casting and is separated from it only by the remaining thickness of the sand mold, a targeted rapid cooling is achieved, which in turn the achievement of optimum microstructural properties such as strength, elongation, toughness, fine grain u. a. allows.
  • the coolant is a gas, preferably air.
  • the flow of the coolant is effected by introducing the same under pressure at the coolant inlet.
  • the flow of the coolant is effected by sucking the same at the coolant outlet.
  • the coolant flows through a filter before discharge into the atmosphere.

Description

Die vorliegende Erfindung betrifft eine Vorrichtung zum Gießen von Gußeisen in einer Kokille mit einer mehrteiligen metallischen Kokille, die eine Sandform umschließt, in deren Hohlraum das geschmolzene Gußeisen eingefüllt wird. Eine solche Vorrichtung ist aus DE 699 23 214 T2 bekannt.The present invention relates to an apparatus for casting cast iron in a mold having a multi-part metallic mold enclosing a sand mold into the cavity of which the molten cast iron is filled. Such a device is out DE 699 23 214 T2 known.

Bei dieser bekannten Vorrichtung soll eine gesteuerte Abkühlung des Werkstoffs nach Füllung der Sandform dadurch erreicht werden, daß die mehreren Kokillenteile kühlmitteldurchströmte Hohlräume aufweisen und diese entsprechend den gewünschten Kühlbedingungen vom Kühlmittel beaufschlagt werden.In this known device, a controlled cooling of the material after filling the sand mold is to be achieved in that the plurality of mold parts coolant-flowed cavities and these are acted upon by the coolant according to the desired cooling conditions.

Eine vollkommene Erreichung des Ziels der gesteuerten Abkühlung ist jedoch schwer erreichbar, da der Wärmeabtransport hier erst über die zwischen Gußteil und Kokilleninnenseite gelegene Sandformwand und dann auch noch über die Innenwände der Kokillenteile stattfindet.A complete achievement of the goal of the controlled cooling is difficult to achieve, since the heat dissipation takes place here only on the between the casting and Kokilleninnenseite located sand mold wall and then also on the inner walls of Kokillenteile.

Ähnliches gilt für eine aus DE 102 42 559 A1 bekannte Technik, bei der zur Steuerung des Abkühlungsverhaltens des Formsandes in diesen Kühlkörper veränderbarer Dichte eingelagert werden. Kühlmitteldurchströmte Hohlräume sind hier jedoch nicht vorhanden.The same applies to one DE 102 42 559 A1 known technique in which are stored to control the cooling behavior of the molding sand in this heat sink variable density. However, coolant-flow cavities are not present here.

Aus DE 100 14 591 C1 ist bekannt, in gießraumseitig offenen Rinnen des Formkastens kühlmitteldurchströmte Kühlrohre zu verlegen. Diese sind dann mit der einlaufenden Metallschmelze direkt am erhaltenen Werkstück angegossen, was eine aufwendige Nachbearbeitung erfordert.Out DE 100 14 591 C1 It is known to lay in the casting chamber side open channels of the molding box coolant flowed through cooling tubes. These are then cast with the incoming molten metal directly on the resulting workpiece, which requires a complex post-processing.

In DE 199 26 322 A1 wird vorgeschlagen, einen Kühlkanal unter Beachtung der Werkstückform konturnah in der Sandform verlaufen zu lassen. Eine die Sandform umschließende mehrteilige metallische Kokille ist nicht gezeigt.In DE 199 26 322 A1 It is proposed to let a cooling channel run close to contour in the sand mold, taking into account the shape of the workpiece. A sand mold enclosing multi-part metallic mold is not shown.

Aus dem US-Patent 5,611,388 ist eine Vorrichtung zum Gießen von Gußeisen in einer Kokille mit einer mehrteiligen metallischen Kokille bekannt, die eine Sandform umschließt, in deren Hohlraum das geschmolzene Gußeisen eingefüllt wird. Die Kokille besteht aus einem Oberteil und einem Unterteil, die beide mit Kühlkanälen versehen sind.From the U.S. Patent 5,611,388 a device for casting cast iron in a mold with a multi-part metallic mold is known, which encloses a sand mold, in the cavity of the molten cast iron is filled. The mold consists of an upper part and a lower part, both of which are provided with cooling channels.

Die US 2005/0103407 A1 zeigt eine Gußform für einen Zylinderkopf mit einem metallischen Formteil sowie mehreren Sandformteilen. Nach dem Gießen wird zum Abschrecken des Gußteils das metallische Formteil entfernt und der freigelegte Bereich des Gußteils mit Kühlwasser besprüht und auf diese Weise abgekühlt.The US 2005/0103407 A1 shows a mold for a cylinder head with a metallic molding and several sand moldings. After casting, the metallic molding is removed to quench the casting and the exposed portion of the casting is sprayed with cooling water and cooled in this manner.

Die WO 00/27567 A1 zeigt eine Vorrichtung zum Gießen von Gußeisen in einer Kokille mit einer mehrteiligen metallischen Kokille, die eine Sandform umschließt, in deren Hohlraum das geschmolzene Gußeisen eingefüllt wird.The WO 00/27567 A1 shows an apparatus for casting cast iron in a mold with a multi-part metallic mold enclosing a sand mold, in the cavity of the molten cast iron is filled.

Aufgabe der Erfindung ist die Erzielung nicht nur einer besseren Kühlung sondern auch einer besseren Steuerbarkeit dieser Kühlung. Die auf diese Weise gelenkte Erstarrung des Gußteils soll die Erzielung optimaler, reproduzierbarer Material- und Gefügeeigenschaften im Gußteil/Bauteil ermöglichen. Schließlich sollen durch die verbesserte Kühlung auch kürzere Taktzeiten und damit erhöhte Leistung der Fertigung erzielt werden.The object of the invention is to achieve not only a better cooling but also a better controllability of this cooling. The controlled in this way solidification of the casting should enable the achievement of optimal, reproducible material and structural properties in the casting / component. Finally, to be achieved by the improved cooling and shorter cycle times and thus increased performance of the production.

Die Lösung der gestellten Aufgabe ergibt sich aus den Patentansprüchen.The solution of the problem arises from the claims.

Die Erfindung wird nachfolgend durch die Beschreibung eines Ausführungsbeispiels anhand der beigegebenen Zeichnung weiter erläutert werden. Diese zeigt schnittbildlich eine Gießvorrichtung der vorgeschlagenen Zusammenstellung.The invention will be further explained by the description of an embodiment with reference to the attached drawing. This shows a sectional view of a pouring device of the proposed compilation.

Die zweigeteilte metallische Kokille 1 umschließt eine Sandform 3, in der der Gießraum bzw. nach aufsteigender Befüllung durch Anschnitte 6 das Gußteil sich befindet. Diese Sandform kann in einem üblichen Verfahren wie Croning-, Coldbox- oder Hotboxverfahren hergestellt werden. In der Innenwand der Kokille 1 und in der Außenwand der Sandform 3 sind, sich einander gegenüberliegend im Querschnitt halbkreisförmige Rinnen ausgebildet, die sich zu einem Kanal 2 ergänzen, welcher schraubenlinienförmig von einem Kühlmitteleintritt 5 zu einem Kühlmittelaustritt 8 verläuft. Es versteht sich, daß je nach der Gestalt von Kokille und Sandform andere Verläufe des Kühlmittelkanals bzw. -raums zweckmäßig sein können, etwa ein mäanderformiger Verlauf.The two-part metallic mold 1 encloses a sand mold 3, in which the casting room or after ascending filling by gates 6, the casting is located. This sand mold can be made in a conventional process such as croning, cold box or hot box processes. In the inner wall of the mold 1 and in the outer wall of the sand mold 3 are formed, opposite each other in cross-section semicircular grooves, which complement each other to a channel 2, which extends helically from a coolant inlet 5 to a coolant outlet 8. It is understood that depending on the shape of mold and sand mold other courses of the coolant channel or space may be appropriate, such as a meandering course.

Ein weiterer Kühlmittelkanal 7, der hier eine sekundäre Kühlung bewirkt, durchzieht die Kokille 1 und ist mit nicht gezeigten Zufuhr- und Abfuhranschlüssen verbunden.Another coolant channel 7, which causes a secondary cooling here, passes through the mold 1 and is connected to feed and discharge ports, not shown.

Die primäre Kühlung erfolgt durch ein den Kühlmittelkanal 2 durchströmendes Kühlmittel. Als solches dient bevorzugt Luft oder, bei Führung in einem geschlossenen Kreislauf, ein inertes Gas. Um die Abkühlung des Gußteils optimal verlaufen zu lassen wird vor allem diese Primärkühlung entsprechend gesteuert, insbesondere über die Menge und Anfangstemperatur, die Durchströmungsgeschwindigkeit und den Druck des eingeleiteten Kühlmittels. Da dieses vorliegend maximal an das Gußteil heranreicht und von diesem nur durch die verbleibende Dicke der Sandform getrennt ist, wird eine gezielte schnelle Abkühlung erreicht, die wiederum die Erzielung optimaler Gefügeeigenschaften wie Festigkeit, Dehnung, Zähigkeit, Feinkörnigkeit u. a. ermöglicht.The primary cooling is carried out by a coolant channel 2 flowing through the coolant. As such, preferably serves air or, when guided in a closed circuit, an inert gas. In order to allow the cooling of the casting run optimally, especially this primary cooling is controlled accordingly, in particular on the amount and initial temperature, the flow rate and the pressure of the introduced coolant. Since this maximum reaches the casting and is separated from it only by the remaining thickness of the sand mold, a targeted rapid cooling is achieved, which in turn the achievement of optimum microstructural properties such as strength, elongation, toughness, fine grain u. a. allows.

Bei vorteilhaften Weiterbildungen ist das Kühlmittel ein Gas, vorzugsweise Luft.In advantageous developments, the coolant is a gas, preferably air.

Bei vorteilhaften Weiterbildungen wird die Strömung des Kühlmittels durch Einleitung desselben unter Druck am Kühlmitteleintritt bewirkt.In advantageous developments, the flow of the coolant is effected by introducing the same under pressure at the coolant inlet.

Bei vorteilhaften Weiterbildungen wird die Strömung des Kühlmittels durch Absaugen desselben am Kühlmittelaustritt bewirkt.In advantageous developments, the flow of the coolant is effected by sucking the same at the coolant outlet.

Bei vorteilhaften Weiterbildungen durchströmt das Kühlmittel vor der Entlassung in die Atmosphäre einen Filter.In advantageous developments, the coolant flows through a filter before discharge into the atmosphere.

Claims (7)

  1. Device for pouring cast iron into a mould having a multi-piece metal mould (1) which surrounds a sand mould (3), in the hollow space (4) of which the molten cast iron is poured, characterised in that at least one space (2) through which coolant flows is formed between the surface of the inner wall of the mould (1) and the outer wall of the sand mould (3).
  2. Device according to claim 1, characterised in that the space through which coolant flows is constructed in the form of at least one channel (2) which extends between the coolant inlet (5) and outlet (8).
  3. Device according to claim 2, characterised in that the channel (2) is in each case approximately half-formed by a groove-like recess of the inner wall of the mould (1) and an opposing groove-like recess in the outer wall of the sand mould (3).
  4. Device according to one or more of claims 1 to 3, characterised in that, when faces are curved without bends, the channel (2) extends in a helical-line-like manner between the coolant inlet (5) and outlet (8).
  5. Device according to one or more of claims 1 to 3, characterised in that, with planar faces which are located at an angle with respect to each other, each of them has a channel which extends in a loop-like or meandering manner between the coolant inlet and outlet.
  6. Device according to one or more of claims 1 to 5, characterised in that the coolant is guided in a closed circuit and flows between the outlet (8) and inlet (5) through a heat exchanger which cools it and a pressure increasing fan and the pressure level of the circuit can be selected.
  7. Device according to one or more of claims 1 to 6, characterised in that at least one channel (7) for a secondary mould coolant, preferably water, extends in a manner known per se through the mould (1).
EP11177151.5A 2010-08-26 2011-08-10 Device for moulding cast iron in a mould Active EP2422901B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11177151T PL2422901T3 (en) 2010-08-26 2011-08-10 Device for moulding cast iron in a mould

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010035440A DE102010035440B4 (en) 2010-08-26 2010-08-26 Apparatus for casting cast iron in a mold

Publications (3)

Publication Number Publication Date
EP2422901A2 EP2422901A2 (en) 2012-02-29
EP2422901A3 EP2422901A3 (en) 2015-06-10
EP2422901B1 true EP2422901B1 (en) 2019-03-06

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Application Number Title Priority Date Filing Date
EP11177151.5A Active EP2422901B1 (en) 2010-08-26 2011-08-10 Device for moulding cast iron in a mould

Country Status (7)

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EP (1) EP2422901B1 (en)
DE (1) DE102010035440B4 (en)
ES (1) ES2729266T3 (en)
HU (1) HUE044935T2 (en)
PL (1) PL2422901T3 (en)
PT (1) PT2422901T (en)
TR (1) TR201907617T4 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014217701A1 (en) 2014-09-04 2016-03-10 Huppert Engineering Gmbh & Co. Kg Process for producing metal casts
US10391551B2 (en) * 2017-02-06 2019-08-27 Fisher Controls International Llc Mold body with integrated chill

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5611388A (en) * 1993-09-02 1997-03-18 Mazda Motor Corporation Method of and apparatus for low-pressure casting
SE513287C2 (en) * 1998-11-06 2000-08-21 Volvo Lastvagnar Ab Method and apparatus for mold casting
DE19926322A1 (en) * 1999-06-09 2000-12-14 Detlef Kochan Plastics processing or metal casting tool has a closed structure and includes a cooling channel closely following the molding cavity profile and at a distance from it
DE10014591C1 (en) * 2000-03-27 2001-08-02 Actech Gmbh Adv Casting Tech Process for increasing pouring in sand molds with directional solidification of castings
DE10242559A1 (en) * 2002-09-13 2004-03-25 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Cooling body used as an insert for sand molds is made from a material which has a change in density during the production of the body so the whole material is penetrated by hollow chambers within the body
JP4062292B2 (en) * 2003-11-19 2008-03-19 マツダ株式会社 Light alloy casting manufacturing method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
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Also Published As

Publication number Publication date
PT2422901T (en) 2019-06-12
EP2422901A2 (en) 2012-02-29
DE102010035440A1 (en) 2012-03-01
DE102010035440B4 (en) 2012-04-12
EP2422901A3 (en) 2015-06-10
TR201907617T4 (en) 2019-06-21
PL2422901T3 (en) 2019-08-30
ES2729266T3 (en) 2019-10-31
HUE044935T2 (en) 2019-11-28

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