EP2727668A1 - Method for producing a cylinder crankcase and casting assembly for a cylinder crankcase - Google Patents

Method for producing a cylinder crankcase and casting assembly for a cylinder crankcase Download PDF

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Publication number
EP2727668A1
EP2727668A1 EP13190037.5A EP13190037A EP2727668A1 EP 2727668 A1 EP2727668 A1 EP 2727668A1 EP 13190037 A EP13190037 A EP 13190037A EP 2727668 A1 EP2727668 A1 EP 2727668A1
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EP
European Patent Office
Prior art keywords
core
cylinder
web
water jacket
cores
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Granted
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EP13190037.5A
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German (de)
French (fr)
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EP2727668B1 (en
Inventor
Raphael Kramer
Peter Andreas Heß
Bernhard Gand
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Martinrea Honsel Germany GmbH
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Martinrea Honsel Germany GmbH
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Priority to PL13190037T priority Critical patent/PL2727668T3/en
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    • 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
    • B22C9/106—Vented or reinforced cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C21/00—Flasks; Accessories therefor
    • B22C21/12—Accessories
    • B22C21/14—Accessories for reinforcing or securing moulding materials or cores, e.g. gaggers, chaplets, pins, bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0009—Cylinders, pistons

Definitions

  • a method and a mold assembly having the features of the preamble is known from EP 0 974 414 B1 known.
  • glass is not an ideal core material in view of the subsequent demolding of the solidified casting. The same applies to the also mentioned in this document web cores made of a salt or graphite.
  • the invention has for its object to provide a method for manufacturing and a mold assembly for a cylinder crankcase, can pour with the or with the compact combustion engines while avoiding the use of conventional sand cores expected disadvantages, with high productivity in the production should be achievable.
  • the invention is based on the consideration that, in view of a rapid and uncomplicated demolding of the solidified casting conventional bonded core sands continue to be the core materials of choice, however, they show strength and stability problems when forming particularly narrow webs, as compared to the load of the einschumbleende molten metal in the mold. These disadvantages can be avoided by the use of web cores embedded in the at least partially metal support for stabilization against the inflowing molten metal, wherein the metal supports preferably consist of the same or a related material as the cast material itself.
  • the Fig. 1 shows an overview of a multi-part mold assembly 1 for producing a cylinder crankcase made of aluminum or an aluminum alloy.
  • the exterior of the cylinder crankcase here one Internal combustion engine with arrangement of the individual cylinder chambers in series and optionally also in V or W-shape is formed by a casting mold 3 arranged in a casting frame for the casting process.
  • a casting mold 3 arranged in a casting frame for the casting process.
  • corresponding cylinder cores 5 are arranged in the outer mold 3.
  • the cylinder cores 5 can axially, ie be retractable along their axis L in the mold 3 quills made of metal, which are cooled during the casting process from the inside to improve their mold release after cooling of the aluminum melt.
  • a single-part or multi-part water jacket core 10 made of molding sand is also placed in the casting mold 3.
  • the water jacket core 10 depicts those regions in the cylinder crankcase that remain free after the casting, so as to allow a flushing of the cylinder crankcase with coolant in the internal combustion engine and thus the removal of the heat generated during the combustion process.
  • the finished casting arrangement 1 additionally has web cores 20 between adjacent cylinder cores 5 arranged transversely to the cylinder bank.
  • the cavities created by these web cores 20 allow the cooling medium to flow in the intermediate wall between adjacent cylinders.
  • the space available for this purpose is severely limited, since in modern internal combustion engines, the tendency is to reduce as far as possible to reduce the overall construction length and the distance A between successive cylinder recesses.
  • a coolant duct is to be accommodated on this small distance A, whose flow cross-section should also not be too low in view of a sufficient coolant throughput.
  • the first boundary edge 21 of the web core 20 is embedded directly into the one wall of the water jacket core 10, however, the second boundary edge 22 is not attached directly in the opposite wall, but attached to this only indirectly, namely an additional component in shape Alternatively, of course, it is also possible to embed the other, ie the second boundary edge 22 directly into the corresponding wall of the water jacket core 10.
  • boundary edges 21, 22 are to be understood as meaning those two edges of the web core 20 which run essentially parallel to the longitudinal axes L of the cylinder recesses and bound the length of the web core 20 in the circumferential direction of the adjacent cylinder recesses.
  • Fig. 1 as well as the Fig. 2 as an enlarged detail show that the thickness B of the web core 20 between its first boundary edge 21 and its second boundary edge 22 is not uniform, but varies.
  • the cross-sectional configuration is equal to the section through a concave lens, wherein the smallest thickness B1 is on the connecting line 31 of the longitudinal axes L of the two adjacent cylinder recesses.
  • the design of the web core 20 is such that no coolant flow takes place from the one side of the water jacket on the other side in the later internal combustion engine, but instead a deflection flow takes place in the form of a loop.
  • the web core 20 is formed similar to a ring and encloses a disposed between the two boundary edges 21, 22 opening 30.
  • the axis 31 of the opening 30 preferably extends on the connecting line 31 of the two adjacent cylinder recesses.
  • Fig. 4 is illustrated by flow arrows, the flow in the formed by the web core 20, later coolant channel.
  • the flow can, depending on the specific geometric and thermodynamic boundary conditions, also take place in the reverse direction.
  • the web core 20 consists primarily of a typical core material, for. B. from a mixed with organic or inorganic binders molding sand. However, an exclusively trained web core would not have sufficient stability over that during the Casting process inflowing molten metal. For this reason, each web core 20 is reinforced to increase its strength, and this provided with a partially embedded in the web core 20 metal carrier.
  • the Fig. 3 shows the bridge core 20 including the metal carrier 25 disposed therein.
  • the metal carrier 25 which can also be referred to as a web plate, is manufactured separately in advance, preferably by punching from a material sheet having a sheet thickness of 0.5-2 mm, preferably 0.5-1 mm and more preferably 0.8 mm.
  • the use of aluminum or an aluminum alloy for the web plate 25 means that during casting all exposed metal areas are liquefied by the light metal melt, and rise as it were in the melt after their solidification.
  • the metal carrier 25 is only partially embedded in the core material of the web core 20. During the solidification process exposed areas of the metal carrier 25 in the solidifying molten aluminum and thus become part of the casting.
  • the end portion of the metal carrier 25 is blank and is included in the production of the water jacket core 10 in this, whereby it comes in the water jacket core 10 to a fixation of the metal carrier 25 and thus also of the web core 20.
  • the formation of the web cores 20 takes place in a core box 40.
  • the web cores 20 are formed in pairs, wherein the first boundary edges 21 are arranged facing each other.
  • the core box 40 provides space for a total of three such pairs.
  • a metal carrier 25 is first placed in the correct position.
  • the injection of sand mixed with organic or inorganic binders takes place via a two opening cores of a pair of web core associated bullet opening 41.
  • the bullet opening 41 leads via a branch 42 to the two mold cavities 45 for the web core pair.
  • the core material fed into the core box via the injection openings 41 therefore passes via the branch 42 into the mold spaces 45 extending on both sides, wherein the mold space 45 has its largest cross-sectional area in the region of the confluence coming from the injection opening 41 or the branch 42.
  • This largest cross-sectional area forms the first boundary edge 21 of the web core 20 and thus that region of the later coolant channel, via which the supply and removal of the coolant takes place.
  • the portion of the metal carrier 25 facing away from the injection opening 41 is fixed in the core mold, while the portion of the metal carrier facing the injection opening 41 protrudes freely into the mold space 45.
  • the paired web cores 20 can be removed therefrom. These are separated in the region of their first boundary edge 21 of the branch 42, and then as described in the mutually facing inner walls of the water jacket core 10 (FIG. Fig. 1 ) embedded.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

Manufacturing cylinder crankcase, comprises (a) arranging cylinder cores (5) for forming cylinder recesses, and at least one water jacket core (10) forming cooling channels of cylinder crankcase, in a casting mold (3), before filling molten metal, (b) fixing separately produced bridge cores (20) at inner side of the water jacket core for forming additional coolant channels, and (c) enclosing the water jacket core during subsequent casting of the molten metal. The bridge cores are provided with an at least partially embedded metal carrier for their stabilization against inflowing molten metal. Manufacturing cylinder crankcase, comprises (a) arranging cylinder cores (5) for forming cylinder recesses, and at least one water jacket core (10) forming cooling channels of cylinder crankcase, in a casting mold (3) for molding outer side of the cylinder crankcase, before filling molten metal, (b) fixing separately produced bridge cores (20) at inner side of the water jacket core for forming additional coolant channels arranged between the adjacent cylinder recesses, and (c) enclosing the water jacket core during subsequent casting of the molten metal. The bridge cores are provided with an at least partially embedded metal carrier for their stabilization against inflowing molten metal. An independent claim is also included for a casting mold arrangement (1) for casting the cylinder crankcase, comprising the casting mold which forms the outer side of the cylinder crankcase, and comprises the cylinder cores, and water jacket core forming the cooling channels of the cylinder crankcase, where the separately produced bridge cores are attached to the inner side of the water jacket core for forming the coolant channels arranged between the adjacent cylinder recesses.

Description

Die Erfindung betrifft zunächst ein Verfahren zum Herstellen eines Zylinderkurbelgehäuses, bei dem, vor dem Einfüllen der Metallschmelze, in einer das Äußere des Zylinderkurbelgehäuses formenden Gießform angeordnet werden:

  • Zylinderkerne für die Ausbildung der Zylinderausnehmungen,
  • wenigstens ein die Kühlkanäle des Zylinderkurbelgehäuses ausbildender Wassermantelkern, wobei zur Ausbildung zusätzlicher, zwischen den benachbarten Zylinderausnehmungen angeordneter Kühlmittelkanäle separat gefertigte Stegkerne innen an dem Wassermantelkern befestigt, und während des anschließenden Gießens von der Metallschmelze umschlossen werden.
The invention relates firstly to a method for producing a cylinder crankcase, in which, prior to filling the molten metal, in a forming the exterior of the cylinder crankcase casting mold are arranged:
  • Cylinder cores for the formation of the cylinder recesses,
  • at least one of the cooling channels of the cylinder crankcase forming water jacket core, wherein to form additional, arranged between the adjacent cylinder recesses coolant channels separately manufactured web cores mounted inside the water jacket core, and are enclosed during the subsequent casting of the molten metal.

Die Erfindung betrifft ferner eine Gießformanordnung für ein Zylinderkurbelgehäuse, bei der in einer das Äußere des Zylinderkurbelgehäuses abbildenden Gießform angeordnet sind:

  • Zylinderkerne zur Abbildung der späteren Zylinderausnehmungen,
  • wenigstens ein die späteren Kühlkanäle des Zylinderkurbelgehäuses abbildender Wassermantelkern, wobei zur Abbildung zwischen den benachbarten Zylinderausnehmungen angeordneter Kühlmittelkanäle separate Stegkerne innen an dem Wassermantelkern befestigt sind.
The invention further relates to a mold assembly for a cylinder crankcase, in which are arranged in a casting of the exterior of the cylinder crankcase mold:
  • Cylinder cores for imaging the later cylinder recesses,
  • at least one of the later cooling channels of the cylinder crankcase imaging water jacket core, wherein for imaging between the adjacent cylinder recesses arranged coolant channels separate web cores are secured inside the water jacket core.

Um die Baulänge eines aus Leichtmetall und insbesondere aus Aluminium oder einer Aluminiumlegierung gegossenen Motorblocks gering zu halten, ist man bestrebt, die Zylinderausnehmungen der jeweiligen Zylinderreihe eng beieinander anzuordnen, d. h. mit entsprechend dünnwandigen Zylinderzwischenwänden zu arbeiten. Diese Zwischenwände unterliegen, vor allem bei modernen, mit hohen spezifischen Leistungen arbeitenden Verbrennungsmotoren durch die eng beieinanderliegenden Brennräume und die Wärmeentwicklung einer erhöhten thermischen Belastung. Diese Belastung wiederum macht es erforderlich, auch in den schmalen Zylinderzwischenwänden der Zylinderreihe Kühlmittelkanäle vorzusehen. Deren Unterbringung bereitet in der Praxis Schwierigkeiten. So gibt es im Stand der Technik zwar Bemühungen, dort mit Hilfe von nachträglich eingefügten Bohrlöchern Öffnungen für den Kühlwassertransport zu schaffen. Wegen der ohnehin geringen Wanddicken ist diese Möglichkeit jedoch nicht immer praktikabel, zudem ist die thermische Wirksamkeit bei vielen Anwendungen nicht optimal.In order to keep the overall length of an engine block cast from light metal and in particular from aluminum or an aluminum alloy low, it is endeavored to arrange the cylinder recesses of the respective cylinder row close to one another, ie to work with correspondingly thin-walled cylinder partition walls. These partitions are subject, especially in modern, with high specific power combustion engines by the closely spaced combustion chambers and the heat of an increased thermal load. This load in turn makes it necessary to provide coolant channels even in the narrow cylinder partitions of the cylinder bank. Their placement is difficult in practice. So Although there are efforts in the art, there to create openings for the cooling water transport there with the help of subsequently inserted holes. Because of the already low wall thicknesses, however, this possibility is not always practical, also the thermal efficiency is not optimal in many applications.

Aus der EP 0 197 365 A2 ist ein Verfahren zur gießtechnischen Herstellung eines Zylinderkurbelgehäuses bekannt, bei dem Kühlmäntel zu beiden Seiten der Zylinderbohrungen vorgesehen sind, wobei diese Kühlmäntel durch zusätzliche Kühlkanäle zwischen den Zylinderzwischenwänden verbunden sind. Diese Kühlkanäle werden durch separate Kerne in der Gießform geformt bzw. abgebildet, wobei die beiden Enden der Kerne in den Kühlmantelkern eingepasst sind. Als Material für die zusätzlichen Kerne ist Zirkonsand vorgesehen. In der Praxis kann es bei den angestrebten, geringen Querschnitten der Kerne infolge der bei der Fertigung unvermeidbar auftretenden Belastungen zu einem Bruch der Kerne kommen.From the EP 0 197 365 A2 is a method for the technical production of a cylinder crankcase known in which cooling jackets are provided on both sides of the cylinder bores, said cooling jackets are connected by additional cooling channels between the cylinder intermediate walls. These cooling channels are formed by separate cores in the mold, with the two ends of the cores fitted into the cooling jacket core. Zirconsand is provided as material for the additional cores. In practice, in the desired, small cross-sections of the cores due to the unavoidably occurring during manufacturing loads to break the cores come.

Aus der US 5,217,059 ist es bekannt, einen zusätzlichen Kühlkanal durch eine aus einem geeigneten Feuerfestmaterial hergestellte Platte zwischen zwei Zylinderausnehmungen auszubilden.From the US 5,217,059 It is known to form an additional cooling channel through a plate made of a suitable refractory material between two cylinder recesses.

Ein Verfahren und eine Gießformanordnung mit den Merkmalen des Oberbegriffs ist aus der EP 0 974 414 B1 bekannt. Zur Bereitstellung eines zusätzlichen Kühlmittelquerschnitts zwischen benachbarten Zylinderausnehmungen werden aus Glas gefertigte Stegkerne in der Gießform angeordnet und mit ihren beiden Enden fixiert. Allerdings ist Glas im Hinblick auf die spätere Entformung des erstarrten Gussteils kein idealer Kernwerkstoff. Ähnliches gilt für die in dieser Druckschrift ebenfalls erwähnten Stegkerne aus einem Salz oder aus Graphit.A method and a mold assembly having the features of the preamble is known from EP 0 974 414 B1 known. To provide an additional coolant cross-section between adjacent cylinder recesses made of glass web cores are arranged in the mold and fixed with its two ends. However, glass is not an ideal core material in view of the subsequent demolding of the solidified casting. The same applies to the also mentioned in this document web cores made of a salt or graphite.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Herstellen und eine Gießformanordnung für ein Zylinderkurbelgehäuse zu schaffen, mit dem bzw. mit der sich kompakt bauende Verbrennungsmotoren unter Vermeidung der bei Verwendung üblicher Sandkerne zu erwartenden Nachteile gießen lassen, wobei eine hohe Produktivität bei der Herstellung erzielbar sein soll.The invention has for its object to provide a method for manufacturing and a mold assembly for a cylinder crankcase, can pour with the or with the compact combustion engines while avoiding the use of conventional sand cores expected disadvantages, with high productivity in the production should be achievable.

Gelöst wird diese Aufgabe durch die Merkmale der Patentansprüche 1 betreffend das Verfahren und 10 betreffend die Gießformanordnung.This object is achieved by the features of claims 1 concerning the method and 10 concerning the mold assembly.

Die Erfindung geht von der Überlegung aus, dass im Hinblick auf eine schnelle und komplikationslose Entformung des erstarrten Gussteils herkömmliche, gebundene Kernsande weiterhin die Kernwerkstoffe erster Wahl sind, sie allerdings beim Formen besonders schmaler Stege Festigkeits- und Stabilitätsprobleme zeigen, etwa gegenüber der Belastung durch die in die Gussform einschießende Metallschmelze. Diese Nachteile lassen sich vermeiden durch die Verwendung von Stegkernen in die zur Stabilisierung gegenüber der zufließenden Metallschmelze zumindest bereichsweise Metallträger eingebettet sind, wobei die Metallträger vorzugsweise aus demselben oder einem verwandten Werkstoff wie der Gusswerkstoff selbst bestehen.The invention is based on the consideration that, in view of a rapid and uncomplicated demolding of the solidified casting conventional bonded core sands continue to be the core materials of choice, however, they show strength and stability problems when forming particularly narrow webs, as compared to the load of the einschießende molten metal in the mold. These disadvantages can be avoided by the use of web cores embedded in the at least partially metal support for stabilization against the inflowing molten metal, wherein the metal supports preferably consist of the same or a related material as the cast material itself.

Mit diesem Verfahren bzw. mit dieser Gießformanordnung lassen sich kompakt bauende Verbrennungsmotoren ohne die bei Verwendung von Sandkernen zu beachtenden Beschränkungen gießen, wobei eine hohe Produktivität bei der Herstellung erzielbar ist. Zur Bildung zusätzlicher Kühlmittelkanäle zwischen benachbarten Zylinderausnehmungen ist es auch nicht erforderlich, durch eine spanabhebende Bearbeitung in das Erstarrungsgefüge des Gussmaterials einzugreifen.With this method or with this casting mold arrangement, it is possible to cast compact internal combustion engines without the restrictions to be observed when using sand cores, with it being possible to achieve high productivity in the production. To form additional coolant channels between adjacent cylinder recesses, it is also not necessary to intervene by a machining in the solidification structure of the casting material.

Vorteilhafte Ausgestaltungen erschließen sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels, wobei auf die Zeichnungen Bezug genommen wird. Darin zeigen:

Fig. 1
einen Teilschnitt durch eine erfindungsgemäße Gießformanordnung zum Gießen eines Zylinderkurbelgehäuses;
Fig. 2
das Detail II der Fig. 1 in vergrößertem Maßstab;
Fig. 3
in einer Ansicht einen in der Gießformanordnung verwendeten Stegkern mit darin teils eingebettetem Metallträger;
Fig. 4
eine der Fig. 3 vergleichbare Ansicht, diesmal des durch den Stegkern erzeugten Hohlraums sowie dessen Durchströmung;
Fig. 5
eine Draufsicht auf einen geöffneten Kernkasten zur gleichzeitigen Herstellung einer Mehrzahl an Stegkernen und
Fig. 6
einen Schnitt entsprechend der Schnittebene VI - VI in Fig. 5.
Advantageous embodiments will become apparent from the following description of an embodiment, reference being made to the drawings. Show:
Fig. 1
a partial section through a mold assembly according to the invention for casting a cylinder crankcase;
Fig. 2
the detail II of the Fig. 1 on an enlarged scale;
Fig. 3
in a view of a web core used in the mold assembly with therein partially embedded metal carrier;
Fig. 4
one of the Fig. 3 comparable view, this time of the cavity produced by the web core and its flow;
Fig. 5
a plan view of an open core box for simultaneously producing a plurality of web cores and
Fig. 6
a section corresponding to the section plane VI - VI in Fig. 5 ,

Die Fig. 1 zeigt in einer Übersichtsdarstellung eine mehrteilig aufgebaute Gießformanordnung 1 zur Herstellung eines Zylinderkurbelgehäuses aus Aluminium oder einer Aluminiumlegierung. Das Äußere des Zylinderkurbelgehäuses, hier eines Verbrennungsmotors mit Anordnung der einzelnen Zylinderräume in Reihe und gegebenenfalls auch in V- oder W-Form, wird durch eine für den Gießprozess in einem Gießrahmen angeordnete Gießform 3 geformt. Zur Formung bzw. Abbildung der in Reihe angeordneten Zylinderausnehmungen des Motorblocks werden entsprechende Zylinderkerne 5 in der äußeren Gießform 3 angeordnet. Die Zylinderkerne 5 können axial, d. h. längs ihrer Achse L in die Gießform 3 einfahrbare Pinolen aus Metall sein, die während des Gießprozesses von innen her gekühlt werden, um ihre Entformbarkeit nach dem Abkühlen der Aluminiumschmelze zu verbessern.The Fig. 1 shows an overview of a multi-part mold assembly 1 for producing a cylinder crankcase made of aluminum or an aluminum alloy. The exterior of the cylinder crankcase, here one Internal combustion engine with arrangement of the individual cylinder chambers in series and optionally also in V or W-shape is formed by a casting mold 3 arranged in a casting frame for the casting process. For shaping or imaging of the row cylinder recesses arranged in the engine block corresponding cylinder cores 5 are arranged in the outer mold 3. The cylinder cores 5 can axially, ie be retractable along their axis L in the mold 3 quills made of metal, which are cooled during the casting process from the inside to improve their mold release after cooling of the aluminum melt.

Für die Ausbildung der Kühlkanäle des Motorblocks wird in der Gießform 3 ferner ein ein-oder mehrteiliger Wassermantelkern 10 aus Formsand platziert. Der Wassermantelkern 10 bildet jene Bereiche im Zylinderkurbelgehäuse ab, die nach dem Abguss freibleiben, um so im Verbrennungsmotor eine Durchspülung des Zylinderkurbelgehäuses mit Kühlflüssigkeit und damit die Abführung der beim Verbrennungsprozess entstehenden Wärme zu ermöglichen.For the formation of the cooling channels of the engine block, a single-part or multi-part water jacket core 10 made of molding sand is also placed in the casting mold 3. The water jacket core 10 depicts those regions in the cylinder crankcase that remain free after the casting, so as to allow a flushing of the cylinder crankcase with coolant in the internal combustion engine and thus the removal of the heat generated during the combustion process.

Bei hochbelasteten Verbrennungsmotoren und insbesondere bei Dieselmotoren mit Turboaufladung ist zur Vermeidung einer zu hohen thermischen Belastung im Motorbetrieb eine zusätzliche Kühlung des Bereichs zwischen jeweils benachbarten Zylinderräumen erforderlich. Zum Formen bzw. Abbilden entsprechender Kühlmittelkanäle verfügt die fertige Gießformanordnung 1 zusätzlich über quer zur Zylinderreihe angeordnete Stegkerne 20 zwischen jeweils benachbarten Zylinderkernen 5. Beim Betrieb des Verbrennungsmotors ermöglichen die durch diese Stegkerne 20 geschaffenen Hohlräume ein Strömen des Kühlmediums auch in der Zwischenwandung zwischen benachbarten Zylindern. Der hierfür zur Verfügung stehende Platz ist allerdings stark eingeschränkt, nachdem bei modernen Verbrennungsmotoren die Tendenz dahin geht, zur Reduzierung der Gesamtbaulänge auch den Abstand A zwischen aufeinanderfolgenden Zylinderausnehmungen soweit als möglich zu verkleinern. Zugleich soll auf diesem geringen Abstand A ein Kühlmittelkanal untergebracht werden, dessen Strömungsquerschnitt zudem im Hinblick auf einen ausreichenden Kühlmitteldurchsatz nicht zu gering sein sollte.In highly loaded internal combustion engines and in particular in diesel engines with turbocharging an additional cooling of the area between each adjacent cylinder chambers is required to avoid excessive thermal load during engine operation. For molding or imaging of corresponding coolant channels, the finished casting arrangement 1 additionally has web cores 20 between adjacent cylinder cores 5 arranged transversely to the cylinder bank. During operation of the internal combustion engine, the cavities created by these web cores 20 allow the cooling medium to flow in the intermediate wall between adjacent cylinders. The space available for this purpose, however, is severely limited, since in modern internal combustion engines, the tendency is to reduce as far as possible to reduce the overall construction length and the distance A between successive cylinder recesses. At the same time a coolant duct is to be accommodated on this small distance A, whose flow cross-section should also not be too low in view of a sufficient coolant throughput.

Das Formen bzw. das gießtechnische Abbilden dieses zusätzlichen Kühlmittelkanals übernimmt der in Fig. 3 wiedergegebene Stegkern 20. Dieser ist mit seinem ersten Begrenzungsrand 21 innen an oder in dem Wassermantelkern 10 fixiert, und mit seinem zweiten Begrenzungsrand 22 an der gegenüberliegenden Innenwandung des Wassermantelkerns 10 fixiert. Die Fixierung erfolgt jeweils durch Einschießen des Formsandes in eine Kernform, welche den Wassermantelkern 10 formt.The molding or the casting technology mapping of this additional coolant channel takes over in Fig. 3 This is fixed with its first boundary edge 21 inside or in the water jacket core 10, and fixed with its second boundary edge 22 on the opposite inner wall of the water jacket core 10. The fixation takes place in each case by injecting the molding sand into a core mold, which forms the water jacket core 10.

Bei dem hier wiedergegebenen Ausführungsbeispiel wird der erste Begrenzungsrand 21 des Stegkerns 20 unmittelbar in die eine Wandung des Wassermantelkerns 10 eingebettet, hingegen der zweite Begrenzungsrand 22 nicht unmittelbar in der gegenüberliegenden Wandung befestigt, sondern an dieser nur mittelbar befestigt, nämlich über ein zusätzliches Bauteil in Gestalt eines im Folgenden noch näher erläuterten Stegblechs 25. Alternativ besteht natürlich auch die Möglichkeit, auch den anderen, also zweiten Begrenzungsrand 22 unmittelbar in die entsprechende Wandung des Wassermantelkerns 10 einzubetten.In the embodiment shown here, the first boundary edge 21 of the web core 20 is embedded directly into the one wall of the water jacket core 10, however, the second boundary edge 22 is not attached directly in the opposite wall, but attached to this only indirectly, namely an additional component in shape Alternatively, of course, it is also possible to embed the other, ie the second boundary edge 22 directly into the corresponding wall of the water jacket core 10.

In diesem Zusammenhang sollen unter den Begrenzungsrändern 21, 22 jene beiden im Wesentlichen parallel zu den Längsachsen L der Zylinderausnehmungen verlaufenden Ränder des Stegkerns 20 verstanden werden, die die Länge des Stegkerns 20 in Umfangsrichtung der benachbarten Zylinderausnehmungen begrenzen.In this connection, the boundary edges 21, 22 are to be understood as meaning those two edges of the web core 20 which run essentially parallel to the longitudinal axes L of the cylinder recesses and bound the length of the web core 20 in the circumferential direction of the adjacent cylinder recesses.

Die Fig. 1 sowie die Fig. 2 als Ausschnittsvergrößerung zeigen, dass die Dicke B des Stegkerns 20 zwischen seinem ersten Begrenzungsrand 21 und seinem zweiten Begrenzungsrand 22 nicht einheitlich ist, sondern sie variiert. Im Schnitt ist die Querschnittsgestaltung gleich dem Schnitt durch eine konkave Linse, wobei sich die geringste Dicke B1 auf der Verbindungslinie 31 der Längsachsen L der beiden benachbarten Zylinderausnehmungen befindet.The Fig. 1 as well as the Fig. 2 as an enlarged detail show that the thickness B of the web core 20 between its first boundary edge 21 and its second boundary edge 22 is not uniform, but varies. In section, the cross-sectional configuration is equal to the section through a concave lens, wherein the smallest thickness B1 is on the connecting line 31 of the longitudinal axes L of the two adjacent cylinder recesses.

Bei dem hier beschriebenen Ausführungsbeispiel ist die Gestaltung des Stegkerns 20 derart, dass im späteren Verbrennungsmotor keine Kühlmittelströmung von der einen Seite des Wassermantels auf dessen andere Seite stattfindet, sondern es findet eine Umlenkströmung in Gestalt einer Schleife statt. Gemäß Fig. 3 ist der Stegkern 20 ähnlich einem Ring ausgebildet und umschließt eine zwischen den beiden Begrenzungsrändern 21, 22 angeordnete Öffnung 30. Die Achse 31 der Öffnung 30 erstreckt sich vorzugsweise auf der Verbindungslinie 31 der zwei benachbarten Zylinderausnehmungen.In the embodiment described here, the design of the web core 20 is such that no coolant flow takes place from the one side of the water jacket on the other side in the later internal combustion engine, but instead a deflection flow takes place in the form of a loop. According to Fig. 3 the web core 20 is formed similar to a ring and encloses a disposed between the two boundary edges 21, 22 opening 30. The axis 31 of the opening 30 preferably extends on the connecting line 31 of the two adjacent cylinder recesses.

In Fig. 4 ist anhand von Strömungspfeilen die Durchströmung in dem durch den Stegkern 20 geformten, späteren Kühlmittelkanal illustriert. Selbstverständlich kann die Durchströmung, je nach den konkreten geometrischen und thermodynamischen Randbedingungen, auch in umgekehrter Richtung erfolgen.In Fig. 4 is illustrated by flow arrows, the flow in the formed by the web core 20, later coolant channel. Of course, the flow can, depending on the specific geometric and thermodynamic boundary conditions, also take place in the reverse direction.

Der Stegkern 20 besteht in erster Linie aus einem typischen Kernwerkstoff, z. B. aus einem mit organischen oder anorganischen Bindemitteln versetzten Formsand. Ein ausschließlich so ausgebildeter Stegkern hätte jedoch nicht genügend Stabilität gegenüber der während des Gießprozesses zufließenden Metallschmelze. Aus diesem Grund ist jeder Stegkern 20 zur Erhöhung seiner Festigkeit armiert, und hierzu mit einem partiell in den Stegkern 20 eingebetteten Metallträger versehen. Die Fig. 3 zeigt den Stegkern 20 einschließlich des darin angeordneten Metallträgers 25.The web core 20 consists primarily of a typical core material, for. B. from a mixed with organic or inorganic binders molding sand. However, an exclusively trained web core would not have sufficient stability over that during the Casting process inflowing molten metal. For this reason, each web core 20 is reinforced to increase its strength, and this provided with a partially embedded in the web core 20 metal carrier. The Fig. 3 shows the bridge core 20 including the metal carrier 25 disposed therein.

Der Metallträger 25, der sich auch als Stegblech bezeichnen lässt, wird vorab separat gefertigt, vorzugsweise durch Stanzen aus einem Materialblech mit einer Blechdicke von 0,5 - 2 mm, vorzugsweise 0,5 - 1 mm und besonders bevorzugt 0,8 mm. Die Verwendung von Aluminium oder einer Aluminiumlegierung für das Stegblech 25 führt dazu, dass beim Guss alle offenliegenden Metallbereiche durch die Leichtmetallschmelze verflüssigt werden, und gleichsam in der Schmelze nach deren Erstarrung mit aufgehen.The metal carrier 25, which can also be referred to as a web plate, is manufactured separately in advance, preferably by punching from a material sheet having a sheet thickness of 0.5-2 mm, preferably 0.5-1 mm and more preferably 0.8 mm. The use of aluminum or an aluminum alloy for the web plate 25 means that during casting all exposed metal areas are liquefied by the light metal melt, and rise as it were in the melt after their solidification.

Der Metallträger 25 ist nur bereichsweise in den Kernwerkstoff des Stegkerns 20 eingebettet. Während des Erstarrungsprozesses gehen freiliegende Bereiche des Metallträgers 25 in der erstarrenden Aluminiumschmelze auf und werden so Teil des Gusses.The metal carrier 25 is only partially embedded in the core material of the web core 20. During the solidification process exposed areas of the metal carrier 25 in the solidifying molten aluminum and thus become part of the casting.

Der Endabschnitt des Metallträgers 25 ist blank und wird bei der Herstellung des Wassermantelkerns 10 in diesem eingeschlossen, wodurch es im Wassermantelkern 10 zu einer Fixierung des Metallträgers 25 und damit auch des Stegkerns 20 kommt.The end portion of the metal carrier 25 is blank and is included in the production of the water jacket core 10 in this, whereby it comes in the water jacket core 10 to a fixation of the metal carrier 25 and thus also of the web core 20.

Die Herstellung der Stegkerne mit den darin bereichsweise eingebetteten Metallträgern wird im Folgenden anhand der Figuren 5 und 6 erläutert.The production of the web cores with the metal carriers embedded in some areas will be described below with reference to FIGS FIGS. 5 and 6 explained.

Die Formung der Stegkerne 20 erfolgt in einem Kernkasten 40. Die Stegkerne 20 werden darin paarweise geformt, wobei die ersten Begrenzungsränder 21 einander zugewandt angeordnet sind. Beim Ausführungsbeispiel bietet der Kernkasten 40 Platz für insgesamt drei solcher Paare.The formation of the web cores 20 takes place in a core box 40. The web cores 20 are formed in pairs, wherein the first boundary edges 21 are arranged facing each other. In the embodiment, the core box 40 provides space for a total of three such pairs.

In den einzelnen Formräumen 45 für die Stegkerne wird zunächst jeweils ein Metallträger 25 in richtiger Lage platziert.In the individual mold spaces 45 for the web cores, a metal carrier 25 is first placed in the correct position.

Das Einschießen von mit organischen oder anorganischen Bindemitteln versetztem Sand erfolgt über eine beiden Stegkernen eines Stegkernpaars zugeordnete Einschussöffnung 41. Die Einschussöffnung 41 führt über eine Verzweigung 42 zu den beiden Formräumen 45 für das Stegkernpaar.The injection of sand mixed with organic or inorganic binders takes place via a two opening cores of a pair of web core associated bullet opening 41. The bullet opening 41 leads via a branch 42 to the two mold cavities 45 for the web core pair.

Das über die Einschussöffnungen 41 in den Kernkasten zugeführte Kernmaterial gelangt daher über die Verzweigung 42 in die zu beiden Seiten sich erstreckenden Formräume 45, wobei der Formraum 45 seine größte Querschnittsfläche im Bereich der von der Einschussöffnung 41 bzw. der Verzweigung 42 kommenden Einmündung aufweist. Diese größte Querschnittsfläche formt den ersten Begrenzungsrand 21 des Stegkerns 20 und damit jenen Bereich des späteren Kühlmittelkanals, über den der Zu- und Abtransport des Kühlmittels erfolgt.The core material fed into the core box via the injection openings 41 therefore passes via the branch 42 into the mold spaces 45 extending on both sides, wherein the mold space 45 has its largest cross-sectional area in the region of the confluence coming from the injection opening 41 or the branch 42. This largest cross-sectional area forms the first boundary edge 21 of the web core 20 and thus that region of the later coolant channel, via which the supply and removal of the coolant takes place.

Der der Einschussöffnung 41 abgewandte Abschnitt des Metallträgers 25 ist in der Kernform fixiert, während der der Einschussöffnung 41 zugewandte Abschnitt des Metallträgers frei in den Formraum 45 hineinragt.The portion of the metal carrier 25 facing away from the injection opening 41 is fixed in the core mold, while the portion of the metal carrier facing the injection opening 41 protrudes freely into the mold space 45.

Nach Öffnen des Kernkastens 40 lassen sich die paarweise geformten Stegkerne 20 daraus entnehmen. Diese werden im Bereich ihres ersten Begrenzungsrandes 21 von der Verzweigung 42 abgetrennt, und dann wie beschrieben in den einander zugewandten Innenwandungen des Wassermantelkerns 10 (Fig. 1) eingebettet.After opening the core box 40, the paired web cores 20 can be removed therefrom. These are separated in the region of their first boundary edge 21 of the branch 42, and then as described in the mutually facing inner walls of the water jacket core 10 (FIG. Fig. 1 ) embedded.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Gießformanordnungmold assembly
33
Gießformmold
55
Zylinderkerncylinder core
1010
WassermantelkernWater jacket core
2020
StegkernSteg core
2121
erster Begrenzungsrandfirst boundary border
2222
zweiter Begrenzungsrandsecond boundary edge
2525
Stegblech, MetallträgerWeb plate, metal carrier
3030
Öffnungopening
3131
Achse der ÖffnungAxis of the opening
4040
Kernkastencore box
4141
Einschussöffnungbullet hole
4242
Verzweigungbranch
4545
Formraumcavity
AA
Abstanddistance
BB
Dickethickness
B1B1
Dickethickness
LL
Längsachse ZylinderausnehmungLongitudinal axis of the cylinder recess

Claims (18)

Verfahren zum Herstellen eines Zylinderkurbelgehäuses, bei dem, vor dem Einfüllen der Metallschmelze, in einer das Äußere des Zylinderkurbelgehäuses formenden Gießform (3) angeordnet werden: - Zylinderkerne (5) für die Ausbildung der Zylinderausnehmungen, - wenigstens ein die Kühlkanäle des Zylinderkurbelgehäuses ausbildender Wassermantelkern (10), wobei zur Ausbildung zusätzlicher, zwischen den benachbarten Zylinderausnehmungen angeordneter Kühlmittelkanäle separat gefertigte Stegkerne (20) innen an dem Wassermantelkern (10) befestigt, und während des anschließenden Gießens von der Metallschmelze umschlossen werden,
gekennzeichnet durch die Verwendung von Stegkernen (20), die zu ihrer Stabilisierung gegenüber der zufließenden Metallschmelze mit einem zumindest partiell darin eingebetteten Metallträger (25) versehen sind. Method for producing a cylinder crankcase, in which, before the molten metal is introduced, a casting mold (3) forming the exterior of the cylinder crankcase is arranged: - cylinder cores (5) for the formation of the cylinder recesses, - At least one of the cooling channels of the cylinder crankcase forming water jacket core (10), wherein to form additional, arranged between the adjacent cylinder recesses coolant channels separately manufactured web cores (20) inside the water jacket core (10) attached, and are enclosed during the subsequent casting of the molten metal,
characterized by the use of web cores (20) which are provided for stabilizing them against the inflowing molten metal with a metal carrier (25) at least partially embedded therein. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass bei der Befestigung am Wassermantelkern (10) zumindest das eine Ende des Stegkerns (20) in den Kernwerkstoff des Wassermantelkerns (10) eingebunden wird.A method according to claim 1, characterized in that at least one end of the web core (20) is incorporated into the core material of the water jacket core (10) during attachment to the water jacket core (10). Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass zur Befestigung des anderen Endes des Stegkerns (20) ein nicht in den Stegkern (20) eingebetteter Abschnitt des Metallträgers (25) in den Kernwerkstoff des Wassermantelkerns (10) eingebunden wird.A method according to claim 2, characterized in that for securing the other end of the web core (20) a non-embedded in the web core (20) portion of the metal carrier (25) in the core material of the water jacket core (10) is incorporated. Verfahren nach einem der Ansprüche 1 - 3, gekennzeichnet durch Verwendung eines als flaches Blechteil gestalteten Metallträgers (25) mit einer Blechdicke von 0,5 - 2 mm, vorzugsweise 0,5 - 1 mm.Method according to one of claims 1 - 3, characterized by using a designed as a flat sheet metal part metal carrier (25) having a sheet thickness of 0.5 - 2 mm, preferably 0.5 - 1 mm. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass das Herstellen des Metallträgers (25) durch Stanzen aus einem Materialblech erfolgt.A method according to claim 4, characterized in that the production of the metal carrier (25) is carried out by punching from a sheet of material. Verfahren nach einem der vorangehenden Ansprüche, gekennzeichnet durch Verwendung eines Metallträgers (25) aus Aluminium oder aus einer Aluminiumlegierung.Method according to one of the preceding claims, characterized by using a metal carrier (25) made of aluminum or an aluminum alloy. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Stegkern (20) unter zumindest partiellem Einbetten des Metallträgers (25) durch Einschießen von mit organischen oder anorganischen Bindemitteln versetztem Sand in den Formraum (45) eines Kernkastens (40), in dem vorab der Metallträger (25) platziert wurde, gefertigt wird.Method according to one of the preceding claims, characterized in that the web core (20) with at least partial embedding of the metal carrier (25) by injecting mixed with organic or inorganic binders sand in the mold space (45) of a core box (40), in the pre the metal carrier (25) was placed is made. Verfahren nach Anspruch 7, gekennzeichnet durch ein paarweises Fertigen der Stegkerne (20) über eine beiden Stegkernen (20) gemeinsame Einschussöffnung des Kernkastens (40), wobei ein der Einschussöffnung abgewandter Abschnitt des Metallträgers (25) in dem Kernkasten (40) fixiert ist, während ein der Einschussöffnung zugewandter Abschnitt des Metallträgers (25) frei in den Formraum (45) hineinragt.A method according to claim 7, characterized by a pairwise manufacturing of the web cores (20) via a two web cores (20) common insertion opening of the core box (40), wherein a the injection opening facing away portion of the metal carrier (25) is fixed in the core box (40), while one of the insertion opening facing portion of the metal carrier (25) projects freely into the mold space (45). Verfahren nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass der Formraum (45) seine größte Querschnittsfläche im Bereich der von der Einschussöffnung (41) kommenden Einmündung aufweist.A method according to claim 7 or 8, characterized in that the molding space (45) has its largest cross-sectional area in the area of the injection opening (41) coming in the confluence. Gießformanordnung für ein Zylinderkurbelgehäuse, bei der in einer das Äußere des Zylinderkurbelgehäuses abbildenden Gießform (3) angeordnet sind: - Zylinderkerne (5) zur Abbildung der späteren Zylinderausnehmungen, - wenigstens ein die späteren Kühlkanäle des Zylinderkurbelgehäuses abbildender Wassermantelkern (10), wobei zur Abbildung zwischen den benachbarten Zylinderausnehmungen angeordneter Kühlmittelkanäle separate Stegkerne (20) innen an dem Wassermantelkern (10) befestigt sind,
dadurch gekennzeichnet, dass die Stegkerne (20) mit einem zumindest partiell darin eingebetteten Metallträger (25) versehen sind. Casting arrangement for a cylinder crankcase, in which the casting mold (3) depicting the exterior of the cylinder crankcase is arranged: Cylinder cores (5) for imaging the later cylinder recesses, at least one water jacket core (10) depicting the later cooling passages of the cylinder crankcase, separate web cores (20) being fastened to the inside of the water jacket core (10) for imaging between the adjacent cylinder passages arranged coolant channels,
characterized in that the web cores (20) are provided with an at least partially embedded therein metal carrier (25). Gießformanordnung nach Anspruch 10, dadurch gekennzeichnet, dass zumindest das eine Ende des Stegkerns (20) in den Kernwerkstoff des Wassermantelkerns (10) eingebunden ist.Casting arrangement according to claim 10, characterized in that at least one end of the web core (20) is incorporated in the core material of the water jacket core (10). Gießformanordnung nach Anspruch 11, dadurch gekennzeichnet, dass zur Befestigung des anderen Endes des Stegkerns (20) ein nicht in den Stegkern (20) eingebetteter Abschnitt des Metallträgers (25) in den Kernwerkstoff des Wassermantelkerns (10) eingebunden ist.Casting arrangement according to claim 11, characterized in that for fastening the other end of the web core (20) not embedded in the web core (20) Section of the metal carrier (25) is incorporated in the core material of the water jacket core (10). Gießformanordnung nach einem der Ansprüche 10 - 12, gekennzeichnet durch einen als flaches Blechteil gestalteten Metallträger (25) mit einer Blechdicke von 0,5 - 2 mm, vorzugsweise 0,5 - 1 mm.Casting arrangement according to one of Claims 10 to 12, characterized by a metal carrier (25) designed as a flat sheet-metal part and having a sheet thickness of 0.5 to 2 mm, preferably 0.5 to 1 mm. Gießformanordnung nach einem der Ansprüche 10 - 13, dadurch gekennzeichnet, dass der Stegkern (20) aus mit organischen oder anorganischen Bindemitteln versetztem Sand, und der Metallträger (25) aus Aluminium oder aus einer Aluminiumlegierung besteht.Casting arrangement according to one of claims 10 - 13, characterized in that the web core (20) consists of sand mixed with organic or inorganic binders, and the metal support (25) consists of aluminum or of an aluminum alloy. Gießformanordnung nach einem der Ansprüche 10 - 14, dadurch gekennzeichnet, dass sich der Stegkern (20), in Umfangsrichtung der zwei benachbarten Zylinderausnehmungen betrachtet, zwischen einem ersten (21) und einem zweiten (22) Begrenzungsrand erstreckt, wobei sich beide Begrenzungsränder (21, 22) im Wesentlichen parallel zur Längsachse (L) der Zylinderausnehmungen erstrecken.Casting arrangement according to one of claims 10 - 14, characterized in that the web core (20), viewed in the circumferential direction of the two adjacent cylinder recesses, extends between a first (21) and a second (22) delimiting edge, wherein both boundary edges (21, 22) extend substantially parallel to the longitudinal axis (L) of the cylinder recesses. Gießformanordnung nach Anspruch 15, dadurch gekennzeichnet, dass die in Umfangsrichtung der zwei benachbarten Zylinderwandungen betrachtete Stegquerschnittsfläche des Stegkerns (20) an oder nahe seines ersten Begrenzungsrandes (21) größer ist, als auf allen übrigen Stegquerschnitten.A mold assembly according to claim 15, characterized in that in the circumferential direction of the two adjacent cylinder walls considered web cross-sectional area of the web core (20) at or near its first boundary edge (21) is greater than on all other web cross-sections. Gießformanordnung nach Anspruch 15 oder 16, dadurch gekennzeichnet, dass ein nicht in den Stegkern (20) eingebetteter Abschnitt des Metallträgers (25) aus dem zweiten Begrenzungsrand (22) herausragt, und in den Kernwerkstoff des Wassermantelkerns (10) eingebunden ist.A mold assembly according to claim 15 or 16, characterized in that a not in the web core (20) embedded portion of the metal carrier (25) protrudes from the second boundary edge (22), and is incorporated into the core material of the water jacket core (10). Gießformanordnung nach einem der Ansprüche 15 - 17, dadurch gekennzeichnet, dass der Stegkern (20) als ein Ring ausgebildet ist, der eine zwischen den beiden Begrenzungsrändern (21, 22) angeordnete Öffnung (30) umschließt, wobei sich die Achse (31) der Öffnung (30) längs der Verbindungslinie der zwei benachbarten Zylinderausnehmungen erstreckt.Casting arrangement according to one of claims 15-17, characterized in that the web core (20) is formed as a ring, which encloses an opening (30) arranged between the two boundary edges (21, 22), wherein the axis (31) of the Opening (30) along the connecting line of the two adjacent cylinder recesses extends.
EP13190037.5A 2012-11-06 2013-10-24 Method for producing a cylinder crankcase and casting assembly for a cylinder crankcase Active EP2727668B1 (en)

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JP2001025858A (en) * 1999-07-16 2001-01-30 Konishi Chuzo:Kk Method for supporting inserting material for cast-in
WO2005102560A2 (en) * 2004-04-20 2005-11-03 Tenedora Nemak, S.A. De C.V. Method and apparatus for casting aluminum engine blocks with cooling liquid passage in ultra thin interliner webs
DE102005048650A1 (en) * 2005-10-11 2007-04-12 Daimlerchrysler Ag Crankcase for an engine block has a sheet-metal structure cast en bloc with fluid-conducting areas divided into separate inner and outer fluid-conducting devices
WO2009052883A2 (en) * 2007-10-19 2009-04-30 Daimler Ag Housing for a blade wheel

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CN104028700A (en) * 2014-06-03 2014-09-10 芜湖永达科技有限公司 Cylinder body water jacket core and preparation method thereof
WO2016005806A1 (en) * 2014-07-09 2016-01-14 Tenedora Nemak, S.A. De C.V. Core, use of a core, and mehtod for the production of a core
US10850321B2 (en) 2014-07-09 2020-12-01 Nemak, S.A.B. De C.V. Foundry core, use of a foundry core, and method for producing a foundry core
CN107363227A (en) * 2017-07-26 2017-11-21 江苏雷科德轨道交通科技有限公司 Gear case body casting manufacture craft
CN107931540A (en) * 2017-11-24 2018-04-20 共享装备股份有限公司 The casting method of V-type engine mainframe
AT525313A1 (en) * 2018-01-16 2023-02-15 Avl List Gmbh CYLINDER BLOCK OF AN INTERNAL ENGINE
AT525313B1 (en) * 2018-01-16 2023-06-15 Avl List Gmbh CYLINDER BLOCK OF AN INTERNAL ENGINE
CN108425761A (en) * 2018-04-03 2018-08-21 南京世界村汽车动力有限公司 A kind of housing structure of automobile engine
CN111702136A (en) * 2020-07-28 2020-09-25 合肥江淮铸造有限责任公司 Pre-buried chaplet
CN111957900A (en) * 2020-07-29 2020-11-20 东风商用车有限公司 Replaceable drain sleeve core for casting engine cylinder cover
CN111957900B (en) * 2020-07-29 2022-03-18 东风商用车有限公司 Replaceable drain sleeve core for casting engine cylinder cover
CN114454308A (en) * 2022-03-01 2022-05-10 北京利尔高温材料股份有限公司 Current regulator slidingtype inner core assembling die

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EP2727668B1 (en) 2016-08-31
PL2727668T3 (en) 2017-12-29
HUE031056T2 (en) 2017-06-28

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