EP0223874A1 - Mould for cylinder blocks of internal-combustion engines - Google Patents

Mould for cylinder blocks of internal-combustion engines Download PDF

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Publication number
EP0223874A1
EP0223874A1 EP85114970A EP85114970A EP0223874A1 EP 0223874 A1 EP0223874 A1 EP 0223874A1 EP 85114970 A EP85114970 A EP 85114970A EP 85114970 A EP85114970 A EP 85114970A EP 0223874 A1 EP0223874 A1 EP 0223874A1
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EP
European Patent Office
Prior art keywords
cylinder block
box shape
cylinder
core
lower box
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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.)
Granted
Application number
EP85114970A
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German (de)
French (fr)
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EP0223874B1 (en
Inventor
Horst Henkel
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Fritz Winter Eisengiesserei OHG
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Fritz Winter Eisengiesserei OHG
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Priority to DE19843419979 priority Critical patent/DE3419979C2/en
Application filed by Fritz Winter Eisengiesserei OHG filed Critical Fritz Winter Eisengiesserei OHG
Priority to AT85114970T priority patent/ATE36661T1/en
Priority to EP85114970A priority patent/EP0223874B1/en
Publication of EP0223874A1 publication Critical patent/EP0223874A1/en
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Publication of EP0223874B1 publication Critical patent/EP0223874B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes

Definitions

  • the invention relates to a casting mold for cylinder blocks of internal combustion engines with a lower box shape, an upper box shape, a water jacket core and possibly a head plate bore core, a dividing line between the mold halves in the outer region of the mold halves extending horizontally.
  • Such cylinder blocks are usually cast from gray cast iron or aluminum.
  • the outer contours of gray cast iron blocks are formed by compacted molding sand (green sand, consisting of quartz sand, bentonite, coal dust and water).
  • the inner contours of the cylinder blocks are formed by suitable cores, the cores being produced from quartz sand or other sands with cold and / or warm-curing binder systems (resin and hardener).
  • the cores used in such casting processes are very expensive.
  • the cylinder blocks are cast upright on the base plate using the cores listed above.
  • the two mold halves, which are arranged laterally here, are moved perpendicular to the axis of the cylinder bores.
  • Fluctuations in the distance between the upper box and the lower box are fully transferred to an entire block half with the resulting different wall thicknesses and weight differences of the cast cylinder block.
  • crankcase area of the cylinder block must be formed with the help of the aforementioned crankcase core, the production of which is considerably more expensive than the contours formed by means of green sand.
  • the invention avoids these disadvantages. It is based on the task of proposing a casting mold of the type mentioned in the introduction, in the use of which part of the relatively expensive cores can be replaced by shaped contours. Nevertheless, cylinder blocks cast using the casting mold according to the invention are to be distinguished by narrow tolerances and an overall reduced material consumption combined with a reduced manufacturing time.
  • the invention is characterized in that the lower box shape and the upper box shape are designed and arranged so that the cylinder block is cast upright and that the lower box shape and the upper box shape can be demolded in the axial direction of the cylinder block, the lower box shape also the interior of the crankcase.
  • the crankcase area can now be produced in green form.
  • the distance and the width dimension of the bearing blocks of the cylinder block can be manufactured with greater accuracy. It is also possible to work with lower processing allowances.
  • the housing wall thickness can be significantly reduced in nominal size and within its tolerance range compared to cylinder blocks that are conventionally cast.
  • the water jacket core no longer needs to be supported by core supports. He also receives no deformation during the casting process, as is the case with the known casting mold with the cylinder block arranged horizontally, because the water jacket core stands upright.
  • a circular outer cylinder diameter is made possible. This can be reduced to the minimum construction size.
  • the novel casting mold enables tighter manufacturing tolerances to be achieved, combined with tangible weight savings.
  • the outer contour of the cylinder block and its crank chamber area can be formed without undercuts, which then enables demolding in the axial direction without further ado.
  • undercuts are present, for example for construction reasons, separate cores are used in the undercuts, which then allow the upper box shape and lower box shape to be demolded axially.
  • the horizontal outer area of the dividing line between the upper box shape and the lower box shape extends in the area of the base plate of the cylinder block. This completely eliminates the influence of fluctuations in the distance between the top box shape and the bottom box shape.
  • the cylinder block in question is provided on the footplate with an outwardly facing flange at the free end of the crankcase wall, which serves as a connection surface to the oil pan.
  • the mold according to the invention is generally suitable for cylinder blocks of internal combustion engines, namely both for passenger cars and for trucks, including ship drives, etc.
  • the known casting mold shown in FIG. 1 has a lower box shape 1, an upper box shape 2, a crankcase core 3, a head plate bore core 4 and a water jacket core 5.
  • a dividing line 6 between the mold halves 1, 2 runs horizontally and coincides with the longitudinal axis of the cylinder block 7 to be cast.
  • the outer contour 8 of the cylinder block has projections in the axial direction, so that demolding in the axial direction would not be possible.
  • the two mold halves 1, 2 are therefore demolded in the radial, perpendicular direction, i.e. in the direction of arrow 9.
  • FIG. 2 The likewise known casting mold shown in FIG. 2 is basically constructed like that according to FIG. 1, the only difference being that the cylinder block is cast upright in a departure from FIG. 1. Also in FIG in the direction of arrow 9.
  • FIG. 3 has a lower case shape 11, an upper case shape 12, a top plate bore core 13 and a water jacket core 14. It can be seen that the lower case shape also takes over the function of the otherwise existing crankcase core.
  • a dividing line 15 between the mold halves 11, 12 runs horizontally in the outer region, specifically in the plane of the base plate surface of the cylinder block 16. Then inwards it follows the shape of the crank chamber region.
  • the outer contour 17 of the cylinder block has no undercuts, so that the mold halves 11, 12 in the direction of arrow 18, i.e. can be demolded in the axial direction of the cylinder block. (The axis is indicated at item 19.)
  • crankcase area of the cylinder block also has no undercuts, so that the lower box shape 11 can be demolded downwards without obstacles.
  • crankcase core is omitted and replaced by the bottom box mold 11 formed from green sand, the gas development during the casting process, which is otherwise based on the heating of the crankcase core, is significantly reduced. Furthermore, the wall thicknesses in all block areas can be produced reproducibly with a tolerance that has not been feasible until now.
  • the casting mold according to the invention shown in FIG. 4 essentially corresponds to that according to FIG. 3
  • crank area and the The outer contour is essentially shaped and the undercuts are formed by cores 20, 21 to be inserted into the lower and / or upper box shape 11, 12.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

1. A mould for cylinder blocks of internal combustion engines, having a lower box mould, an upper box mould, a water jacket core and if desired a headplate borehole core, wherein a separating line runs horizontally between the moulds in the outer region of the moulds, characterised in that the lower box mould (11) and the upper box mould (12) are shaped and arranged such that the cylinder block (16) is cast in an upright position and in that the lower box mould (11) and the upper box mould (12) can be released in the axial direction (18) of the cylinder boreholes of the cylinder block (16), the lower box mould (11) also forming the inner region of the crankcase.

Description

Die Erfindung betrifft eine Gießform für Zylinderblöcke von Verbrennungsmotoren mit einer Unterkastenform, einer Oberkastenform, einem Wassermantelkern und ggf. einem Kopfplatten-Bohrungskern, wobei eine Trennlinie zwischen den Formhälften im Außenbereich der Formhälften horizontal verläuft.The invention relates to a casting mold for cylinder blocks of internal combustion engines with a lower box shape, an upper box shape, a water jacket core and possibly a head plate bore core, a dividing line between the mold halves in the outer region of the mold halves extending horizontally.

Derartige Zylinderblöcke werden üblicherweise aus Grau­guß oder Aluminium gegossen. Die Außenkonturen bei Grau­gußblöcken werden durch verdichteten Formsand (gleich Grünsand, bestehend aus Quarzsand, Bentonit, Kohlenstaub und Wasser) gebildet. Die Innenkonturen der Zylinder­blocks werden durch geeignete Kerne gebildet, wobei die Kerne aus Quarzsand oder anderen Sanden mit kalt- und/­oder warmaushärtenden Bindersystemen (Harz und Härter) hergestellt werden. Die bei derartigen Gießverfahren verwendeten Kerne sind sehr teuer.Such cylinder blocks are usually cast from gray cast iron or aluminum. The outer contours of gray cast iron blocks are formed by compacted molding sand (green sand, consisting of quartz sand, bentonite, coal dust and water). The inner contours of the cylinder blocks are formed by suitable cores, the cores being produced from quartz sand or other sands with cold and / or warm-curing binder systems (resin and hardener). The cores used in such casting processes are very expensive.

Soweit bekannt, sind bisher zwei Typen solcher Gieß­formen im Einsatz. Die am weitesten verbreitete Gieß­form arbeitet so, daß die Zylinderblöcke auf der Seite liegend in einem Unterkasten und Oberkasten geformt werden. In die offenen Formen werden die erwähnten Kerne eingelegt. Unterkasten und Oberkasten werden dann zusammen­gelegt und es wird abgegossen.As far as is known, two types of such molds have been used to date. The most widely used casting mold works in such a way that the cylinder blocks are formed lying on their side in a lower box and upper box. The cores mentioned are inserted into the open molds. Lower box and upper box are then put together and poured off.

Bei einem anderen Verfahren werden die Zylinderblöcke auf der Fußplatte stehend gegossen, und zwar unter Verwendung der vorstehend aufgeführten Kerne. Auch hierbei werden die beiden Formhälften, die hier also seitlich angeordnet sind, senkrecht zur Achse der Zylinderbohrungen bewegt.In another method, the cylinder blocks are cast upright on the base plate using the cores listed above. Here, too, the two mold halves, which are arranged laterally here, are moved perpendicular to the axis of the cylinder bores.

Die Anforderungen der Automobilindustrie in Richtung auf Gewichtsersparnis und damit Einhaltung erheblich engerer Gußtoleranzen lassen es sinnvoll erscheinen, von den vor­stehend geschilderten und zur Zeit üblichen Konstruktions­und Gießprinzipien abzuweichen und neue Wege zu gehen. Beide vorstehend erläuterten bekannten Gießverfahren haben nämlich folgende Nachteile:The requirements of the automotive industry in terms of weight saving and thus compliance with considerably narrower casting tolerances make it seem sensible to deviate from the above-described and currently common design and casting principles and to break new ground. Both known casting methods explained above have the following disadvantages:

Schwankungen im Abstand zwischen dem Oberkasten und dem Unterkasten übertragen sich im vollen Umfang auf eine gesamte Blockhälfte mit den daraus resultierenden, unter­schiedlichen Wandstärken und Gewichtsdifferenzen des ge­gossenen Zylinderblocks.Fluctuations in the distance between the upper box and the lower box are fully transferred to an entire block half with the resulting different wall thicknesses and weight differences of the cast cylinder block.

Der Kurbelraumbereich des Zylinderblocks muß zwangsweise mit Hilfe des erwähnten Kurbelraumkerns gebildet werden, dessen Herstellung im Vergleich zu mittels Grünsand formgebildeten Konturen erheblich teurer ist.The crankcase area of the cylinder block must be formed with the help of the aforementioned crankcase core, the production of which is considerably more expensive than the contours formed by means of green sand.

Auftriebskräfte während des Formfüllvorgangs, insbesondere im Wassermantelbereich, sind schwierig abzufangen.Buoyancy forces during the mold filling process, especially in the water jacket area, are difficult to absorb.

Das zwangsläufig kernintensive Verfahren führt zu hoher Gasentwicklung während des Gieß- und Erstarrungsprozesses.The inevitably core-intensive process leads to high gas development during the casting and solidification process.

Die Erfindung vermeidet diese Nachteile. Ihr liegt die Aufgabe zugrunde, eine Gießform der eingangs genannten Art vorzuschlagen, bei deren Verwendung ein Teil der relativ teuren Kerne durch formgebildete Konturen ersetzt werden kann. Dennoch sollen mit der erfindungsgemäßen Gießform gegossenen Zylinderblöcke sich durch enge Toleranzen und einen insgesamt verringerten Materialver­brauch, verbunden mit einer verringerten Herstellungszeit, auszeichnen.The invention avoids these disadvantages. It is based on the task of proposing a casting mold of the type mentioned in the introduction, in the use of which part of the relatively expensive cores can be replaced by shaped contours. Nevertheless, cylinder blocks cast using the casting mold according to the invention are to be distinguished by narrow tolerances and an overall reduced material consumption combined with a reduced manufacturing time.

Zur Lösung dieser Aufgabe ist die Erfindung dadurch ge­kennzeichnet, daß die Unterkastenform und die Oberkasten­form so gestaltet und angeordnet sind, daß der Zylinder­block stehend gegossen wird und daß die Unterkastenform und die Oberkastenform in axialer Richtung des Zylinder­blocks entformt werden können, wobei die Unterkastenform auch den Innenbereich des Kurbelraums formen kann.To achieve this object, the invention is characterized in that the lower box shape and the upper box shape are designed and arranged so that the cylinder block is cast upright and that the lower box shape and the upper box shape can be demolded in the axial direction of the cylinder block, the lower box shape also the interior of the crankcase.

Man kann somit jetzt den Kurbelraumbereich in Grünform herstellen. Der Abstand und das Breitenmaß der Lager­stühle des Zylinderblockes können mit höherer Genauigkeit hergestellt werden. Es kann auch mit geringeren Bearbei­tungszugaben gearbeitet werden. Die Gehäusewandstärke kann im Nennmaß und in deren Toleranzfeld gegenüber Zylinder­blöcken, die herkömmlich gegossen werden, erheblich ein­geengt werden. Der Wassermantelkern bedarf keiner Lage­rung mehr durch Kernstützen. Er erhält auch keine Defor­mation während des Gießvorgangs, wie dies bei der be­kannten Gießform mit liegender Anordnung des Zylinder­blocks der Fall ist, weil der Wassermantelkern aufrecht steht. Fernerhin wird ein kreisrunder Zylinderaußendurch­messer ermöglicht. Dieser läßt sich auf das mindeste Konstruktionsmaß bringen. Insgesamt lassen sich durch die neuartige Gießform engere Fertigungstoleranzen verwirk­lichen, verbunden mit fühlbaren Gewichtseinsparungen.The crankcase area can now be produced in green form. The distance and the width dimension of the bearing blocks of the cylinder block can be manufactured with greater accuracy. It is also possible to work with lower processing allowances. The housing wall thickness can be significantly reduced in nominal size and within its tolerance range compared to cylinder blocks that are conventionally cast. The water jacket core no longer needs to be supported by core supports. He also receives no deformation during the casting process, as is the case with the known casting mold with the cylinder block arranged horizontally, because the water jacket core stands upright. Furthermore, a circular outer cylinder diameter is made possible. This can be reduced to the minimum construction size. Overall, the novel casting mold enables tighter manufacturing tolerances to be achieved, combined with tangible weight savings.

Man kann die Außenkontur des Zylinderblocks und seinen Kurbelraumbereich ohne Hinterschneidungen ausbilden, wodurch dann das Entformen in axialer Richtung ohne weiteres ermöglicht wird. Sind aber, beispielsweise aus Konstruktionsgründen, solche Hinterschneidungen doch vor­handen, so werden in die Hinterschneidungen gesonderte Kerne eingesetzt, die dann das axiale Entformen der Ober­kastenform und Unterkastenform ermöglichen.The outer contour of the cylinder block and its crank chamber area can be formed without undercuts, which then enables demolding in the axial direction without further ado. However, if such undercuts are present, for example for construction reasons, separate cores are used in the undercuts, which then allow the upper box shape and lower box shape to be demolded axially.

Bevorzugt wird es, wenn der horizontale Außenbereich der Trennlinie zwischen der Oberkastenform und der Unterkasten­form im Bereich der Fußplatte des Zylinderblocks verläuft. Dadurch wird der Einfluß von stets vorhandenen Schwankungen im Abstand zwischen der Oberkastenform und der Unterkasten­form vollständig eliminiert. Diese Anordnung ist fernerhin vorzuziehen, wenn, wie dies häufig der Fall ist, der be­treffende Zylinderblock an der Fußplatte mit einem nach außen weisenden Flansch am freien Ende der Kurbelraumwand versehen ist, der als Anschlußfläche zur Ölwanne dient. Allgemein kann zu der Anordnung der horizontalen Trennlinie zwischen den beiden Formen gesagt werden, daß diese natür­lich auch weiter oberhalb der Fußplatte des Zylinderblocks verlaufen kann, sofern das Prinzip der Entformbarkeit in axialer Richtung beibehalten bleibt, und sofern man gegebenenfalls keinen so hohen Wert auf die Eliminierung derjenigen Nachteile legt, die von den zwangsläufig vor­handenen Abstandsschwankungen zwischen den beiden Form­hälften herrühren.It is preferred if the horizontal outer area of the dividing line between the upper box shape and the lower box shape extends in the area of the base plate of the cylinder block. This completely eliminates the influence of fluctuations in the distance between the top box shape and the bottom box shape. This arrangement is also preferable if, as is often the case, the cylinder block in question is provided on the footplate with an outwardly facing flange at the free end of the crankcase wall, which serves as a connection surface to the oil pan. In general, it can be said about the arrangement of the horizontal dividing line between the two forms that this can of course also run further above the base plate of the cylinder block, provided that the principle of demoldability in the axial direction is retained, and provided that the elimination is not so important of those disadvantages that result from the inevitably existing fluctuations in distance between the two mold halves.

Es sei erwähnt, daß die erfindungsgemäße Gießform für Zylinderblöcke von Verbrennungsmotoren allgemein geeignet ist, nämlich sowohl für Personenkraftwagen wie auch für Lastkraftwagen einschließlich Schiffsantriebe usw.It should be mentioned that the mold according to the invention is generally suitable for cylinder blocks of internal combustion engines, namely both for passenger cars and for trucks, including ship drives, etc.

Die Erfindung wird im folgenden anhand eines Ausführungs­beispiels näher erläutert, aus dem sich weitere wichtige Merkmale ergeben. Zur Verdeutlichung der Vorteile der Erfindung sind in Fig. 1 und 2 die vorstehend bereits erläuterten beiden bekannten Gießformen dargestellt. Im einzelnen zeigt:

  • Fig. 1 - schematisch eine erste Ausführungsform einer bekannten Gießform mit horizontaler Trennlinie;
  • Fig. 2 - ebenfalls schematisch eine zweite bekannte Gießform mit lotrechter Trennlinie;
  • Fig. 3 - schematisch eine Gießform nach der Erfindung mit im Außenbereich horizontaler Trennlinie ohne Hinterschneidungen und
  • Fig.4 - schematisch einen Teilschnitt einer Gießform nach der Erfindung mit im Außenbereich horizontaler Trennlinie, wobei Hinterschnei­dungen kerngeformt werden.
The invention is explained in more detail below on the basis of an exemplary embodiment from which further important features result. To illustrate the advantages of the invention, the two known casting molds already explained are shown in FIGS. 1 and 2. In detail shows:
  • Fig. 1 - schematically a first embodiment of a known mold with a horizontal dividing line;
  • Fig. 2 - also schematically a second known mold with a vertical parting line;
  • Fig. 3 - schematically a casting mold according to the invention with a horizontal dividing line in the outer region without undercuts and
  • Fig.4 - schematically shows a partial section of a mold according to the invention with a horizontal dividing line in the outer region, undercuts being core-shaped.

Die in Fig. 1 gezeigte bekannte Gießform weist eine Unterkastenform 1, eine Oberkastenform 2, einen Kurbel­raumkern 3, einen Kopfplatten-Bohrungskern 4 und einen Wassermantelkern 5 auf. Eine Trennlinie 6 zwischen den Formhälften 1, 2 verläuft horizontal und fällt mit der Längs­achse des zu gießenden Zylinderblocks 7 zusammen.The known casting mold shown in FIG. 1 has a lower box shape 1, an upper box shape 2, a crankcase core 3, a head plate bore core 4 and a water jacket core 5. A dividing line 6 between the mold halves 1, 2 runs horizontally and coincides with the longitudinal axis of the cylinder block 7 to be cast.

Die Außenkontur 8 des Zylinderblocks hat in axialer Richtung Vorsprünge, so daß ein Entformen in axialer Richtung nicht möglich wäre. Man entformt daher die beiden Formhälften 1, 2 in radialer, lotgerechter Richtung, d.h. in Richtung des Pfeiles 9.The outer contour 8 of the cylinder block has projections in the axial direction, so that demolding in the axial direction would not be possible. The two mold halves 1, 2 are therefore demolded in the radial, perpendicular direction, i.e. in the direction of arrow 9.

Die in Fig. 2 gezeigte, ebenfalls bekannte Gießform ist grundsätzlich wie die nach Fig. 1 aufgebaut, wobei man lediglich abweichend von Fig. 1 den Zylinderblock stehend gießt.Auch in Fig. 2 werden die beiden Formhälften 1, 2 in radialer Richtung, d.h. in Richtung des Pfeiles 9, entformt.The likewise known casting mold shown in FIG. 2 is basically constructed like that according to FIG. 1, the only difference being that the cylinder block is cast upright in a departure from FIG. 1. Also in FIG in the direction of arrow 9.

Die erfindungsgemäße Gießform nach Fig. 3 hat eine Unter­kastenform 11, eine Oberkastenform 12, einen Kopfplatten-­Bohrungskern 13 und einen Wassermantelkern 14. Man sieht, daß die Unterkastenform zusätzlich die Funktion des sonst vorhandenen Kurbelraumkerns übernimmt. Eine Trennlinie 15 zwischen den Formhälften 11, 12 verläuft im Außenbereich horizontal, und zwar in der Ebene der Fußplattenfläche des Zylinderblocks 16. Daran nach innen anschließend folgt sie der Form des Kurbelraumbereichs. Außerdem ist er­sichtlich, daß die Außenkontur 17 des Zylinderblocks keine Hinterschneidungen hat, so daß die Formhälften 11, 12 in Richtung des Pfeiles 18, d.h. in axialer Richtung des Zylinderblocks, entformt werden können. ( Die Achse ist bei Pos. 19 angedeutet.)3 has a lower case shape 11, an upper case shape 12, a top plate bore core 13 and a water jacket core 14. It can be seen that the lower case shape also takes over the function of the otherwise existing crankcase core. A dividing line 15 between the mold halves 11, 12 runs horizontally in the outer region, specifically in the plane of the base plate surface of the cylinder block 16. Then inwards it follows the shape of the crank chamber region. It can also be seen that the outer contour 17 of the cylinder block has no undercuts, so that the mold halves 11, 12 in the direction of arrow 18, i.e. can be demolded in the axial direction of the cylinder block. (The axis is indicated at item 19.)

Auch ist ersichtlich, daß der Kurbelraumbereich des Zylinder­blocks ebenfalls keine Hinterschneidungen hat, so daß die Unterkastenform 11 ohne Hindernisse nach unten entformt werden kann.It can also be seen that the crankcase area of the cylinder block also has no undercuts, so that the lower box shape 11 can be demolded downwards without obstacles.

Weil der sonst vorhandene Kurbelraumkern entfällt und durch die aus Grünsand geformte Unterkastenform 11 er­setzt wird, wird beim Gießvorgang die Gasentwicklung, die sonst auf der Erwärmung des Kurbelraumkerns beruht, wesentlich reduziert. Ferner können die Wandstärken in allen Blockbereichen mit bisher nicht machbarer Toleranz reproduzierbar hergestellt werden.Because the otherwise existing crankcase core is omitted and replaced by the bottom box mold 11 formed from green sand, the gas development during the casting process, which is otherwise based on the heating of the crankcase core, is significantly reduced. Furthermore, the wall thicknesses in all block areas can be produced reproducibly with a tolerance that has not been feasible until now.

Die in Fig. 4 gezeigte erfindungsgemäße Gießform entspricht im wesentlichen derjenigen nach Fig.3The casting mold according to the invention shown in FIG. 4 essentially corresponds to that according to FIG. 3

Es ist ersichtlich, daß der Kurbelraumbereich und die Außenkontur im wesentlichen formgebildet sind und die Hinterschneidungen durch in die Unter- und/oder Ober­kastenform 11, 12 einzubringende Kerne 20, 21 gebildet werden. Eine Formschräge 22 zwischen der oberen Formhälfte 12 und dem Kern 21, die mit der Achse 19 einen spitzen Winkel einschließt, der sich nach unten öffnet, sowie Radien 23 an Schultern der unteren Formhälfte 11 und am Kern 22 erleichtern ebenfalls das Entformen in Richtung des Pfeils 18.It can be seen that the crank area and the The outer contour is essentially shaped and the undercuts are formed by cores 20, 21 to be inserted into the lower and / or upper box shape 11, 12. A draft bevel 22 between the upper mold half 12 and the core 21, which includes an acute angle with the axis 19 that opens downwards, and radii 23 on the shoulders of the lower mold half 11 and on the core 22 also facilitate demolding in the direction of the arrow 18th

Claims (4)

1. Gießform für Zylinderblöcke von Verbrennungsmotoren mit einer Unterkastenform, einer Oberkastenform, einem Wassermantelkern und ggf. einem Kopfplatten­bohrungskern, wobei eine Trennlinie zwischen den Formen im Außenbereich der Formen horizontal verläuft,
dadurch gekennzeichnet,
daß die Unterkastenform (11) und die Oberkastenform (12) so gestaltet und angeordnet sind, daß der Zylinderblock (16) stehend gegossen wird und daß die Unterkasten­form (11) und die Oberkastenform (12) in axialer Richtung (18) der Zylinderbohrungen des Zylinderblocks (16) entformt werden können, wobei die Unterkastenform (11) auch den Innenbereich des Kurbelraums formt.1. casting mold for cylinder blocks of internal combustion engines with a lower case shape, an upper case shape, a water jacket core and possibly a head plate bore core, a dividing line between the shapes in the outer region of the shapes extending horizontally,
characterized by
that the lower box shape (11) and the upper box shape (12) are designed and arranged so that the cylinder block (16) is cast upright and that the lower box shape (11) and the upper box shape (12) in the axial direction (18) of the cylinder bores of the cylinder block (16) can be removed from the mold, the lower case mold (11) also forming the interior of the crank chamber. 2. Gießform nach Anspruch 1,
dadurch gekennzeichnet,
daß die Außenkontur (17) des Zylinderblocks (16) und sein Kurbelraumbereich keine Hinterschneidungen haben.2. casting mold according to claim 1,
characterized by
that the outer contour (17) of the cylinder block (16) and its crank chamber area have no undercuts. 3. Gießform nach Anspruch 1,
dadurch gekennzeichnet,
daß bei Vorliegen von Hinterschneidungen an der Außen­kontur (17) und/oder am Kurbelraumbereich des Zylinder­blocks (16) in die Hinterschneidungen Kerne (20, 21) eingesetzt sind.3. casting mold according to claim 1,
characterized by
that if there are undercuts on the outer contour (17) and / or on the crank area of the cylinder block (16), cores (20, 21) are inserted into the undercuts. 4. Gießform nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß der horizontale Außenbereich der Trennlinie (15) im Bereich der Fußplatte des Zylinderblocks (16) verläuft.4. Casting mold according to one of claims 1 to 3,
characterized by
that the horizontal outer region of the dividing line (15) runs in the region of the base plate of the cylinder block (16).
EP85114970A 1984-05-29 1985-11-26 Mould for cylinder blocks of internal-combustion engines Expired EP0223874B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19843419979 DE3419979C2 (en) 1984-05-29 1984-05-29 Casting mold for cylinder blocks of internal combustion engines
AT85114970T ATE36661T1 (en) 1985-11-26 1985-11-26 CASTING MOLD FOR CYLINDER BLOCKS OF COMBUSTION ENGINES.
EP85114970A EP0223874B1 (en) 1985-11-26 1985-11-26 Mould for cylinder blocks of internal-combustion engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85114970A EP0223874B1 (en) 1985-11-26 1985-11-26 Mould for cylinder blocks of internal-combustion engines

Publications (2)

Publication Number Publication Date
EP0223874A1 true EP0223874A1 (en) 1987-06-03
EP0223874B1 EP0223874B1 (en) 1988-08-24

Family

ID=8193906

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85114970A Expired EP0223874B1 (en) 1984-05-29 1985-11-26 Mould for cylinder blocks of internal-combustion engines

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EP (1) EP0223874B1 (en)
AT (1) ATE36661T1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8901930B2 (en) 2010-04-28 2014-12-02 Nemak Dillingen Gmbh Method and apparatus for a non contact metal sensing device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, vol. 9, no. 168 (M-396)[1891], 13th July 1985; & JP - A - 60 40 663 (KAWASAKI JUKOGYO K.K.) 04-03-1985 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8901930B2 (en) 2010-04-28 2014-12-02 Nemak Dillingen Gmbh Method and apparatus for a non contact metal sensing device
EP2383056B1 (en) * 2010-04-28 2016-11-30 Nemak Dillingen GmbH Method and apparatus for a non contact metal sensing device

Also Published As

Publication number Publication date
EP0223874B1 (en) 1988-08-24
ATE36661T1 (en) 1988-09-15

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