EP2091678B1 - Casting mould for casting a cast part and use of such a casting mould - Google Patents
Casting mould for casting a cast part and use of such a casting mould Download PDFInfo
- Publication number
- EP2091678B1 EP2091678B1 EP07857208.8A EP07857208A EP2091678B1 EP 2091678 B1 EP2091678 B1 EP 2091678B1 EP 07857208 A EP07857208 A EP 07857208A EP 2091678 B1 EP2091678 B1 EP 2091678B1
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- European Patent Office
- Prior art keywords
- casting
- mould
- mold
- core
- chill
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- 238000005266 casting Methods 0.000 title claims description 142
- 239000000463 material Substances 0.000 claims description 16
- 238000002485 combustion reaction Methods 0.000 claims description 15
- 238000000465 moulding Methods 0.000 claims description 14
- 238000007711 solidification Methods 0.000 claims description 10
- 230000008023 solidification Effects 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 7
- 229910001018 Cast iron Inorganic materials 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 description 38
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 239000003110 molding sand Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 4
- 229910001369 Brass Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000010951 brass Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229910001092 metal group alloy Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007528 sand casting Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
Images
Classifications
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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
- B22D15/02—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of cylinders, pistons, bearing shells or like thin-walled objects
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/101—Permanent cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/103—Multipart cores
Definitions
- the invention relates to a casting mold for casting a casting, which is composed of moldings and casting cores made of molding sand and has at least one casting core for imaging a space in the casting.
- Molds of this type are used in particular for casting engine blocks for internal combustion engines.
- the casting core in the engine block casting forms the respective combustion chamber, while the other molded part depicts the top surface of the engine block on which the cylinder head of the respective internal combustion engine is placed and fastened, if necessary, during assembly as an attachment.
- the cylinder cavities of the engine block molded by molds inserted into the sand mold, which consist of a brass material.
- the aluminum solidifies faster than on the surface of the sand mold due to the higher thermal conductivity of the metal of the mold. This creates there up to a sufficient Depth a structure that has a higher resistance to the stresses occurring in practical use on the running surfaces of the cylinder loads.
- the casting mold is a combination of sand casting and chill casting.
- the mold forms the outer contour of the casting and serves to preheat for casting the critical with respect to the course of solidification part of the casting mold.
- the mold can be specifically heated, so that a uniform solidification profile is ensured and as homogeneously distributed mechanical properties of the casting are achieved.
- the outer contour of the casting determining outer parts are made of metal.
- existing casting cores are used from molding sand. These are held in place by means of cooling iron.
- the casting cores define between them a narrow channel, which is filled with casting material during casting.
- the cores holding the cores are passed through the outer mold halves and thereby isolated from the metal of the outer mold halves, that there takes place the lowest possible heat flow.
- the cooling iron with its free ends beyond the mold halves, so that there takes place air cooling.
- the purpose of the arrangement of the cooling irons in the casting cores is to adapt the course of solidification in the region of the narrow channel enclosed by the casting cores to the solidification profile of the metal present in the region between the outer peripheral surface of the cores and the metallic outer forms. Problems such as cracks and the like that might otherwise be caused by uneven shrinkage of the casting material upon solidification should be avoided.
- the object of the invention was to provide a casting mold which makes it possible in a simple manner to produce castings in which at least one locally narrowly defined section is formed with a structure that is different from the rest of the casting , In addition, an advantageous use of such a mold should be specified.
- the casting core which depicts the respective space in the casting is divided into at least two sections.
- the first section is formed by a chill, while the other section consists of sand usually used in the sand casting molding sand.
- Such molding sands are known to be mixtures of a generally free-flowing molding base material and a binder. This molding sand mixture is formed in a core molding tool to the respective molding or casting core and solidified by a suitable mechanical, chemical and / or thermal treatment so that the obtained part or core has a sufficient dimensional stability for the casting process.
- the cooling mold used according to the invention as part of the casting core forming the space has according to the invention a much higher thermal conductivity than the molding sand from which the remainder of the casting core is made. Accordingly, in the region of the casting mold in which the melt poured into the casting mold comes into contact with the cooling mold, a locally limited accelerated cooling occurs. By choosing the material and the volume of the chill mold, the speed with which the locally limited cooling takes place and the amount of heat removed from the casting metal can be influenced directly.
- the expansion of the region over which the purposefully accelerated removal of heat should take place can be adjusted in a simple manner by the shape of the mold by the shaping of the casting mold. If, for example, during the casting of an engine block, the casting material to be imaged in the engine block is purposefully and massively cooled over a specific partial length of the cylinder space, the casting core representing the respective cylinder space is provided with an annular cooling mold whose height taking into account the thermal migration of the selectively cooled partial length of the cylinder chamber corresponds.
- cooling mold according to the invention used before their use must not be subjected to a special surface treatment or preheated.
- a mold used according to the invention gives such a good surface quality in the area of the casting material coming into contact with it that the mold can be inserted into the casting mold without a finishing order. Accordingly, in a casting mold according to the invention, the casting material comes into direct contact with the mold, so that a particularly rapid heat removal impeded by any intermediate layer acting as an insulator occurs.
- the invention thus enables the cost-effective production of castings, in which locally closely bounded zones with a cast structure produced by accelerated cooling are present in the region of a space to be formed in each case in the castings.
- a particularly advantageous in terms of mass production variant of the invention provides that the chill is made of cast iron. Chill molds made of cast iron can be produced inexpensively and have a favorable thermal conductivity with regard to the processing objective sought here.
- a casting mold according to the invention is particularly suitable for the production of such castings in which, in the region of a transition between the space to be produced in the casting and a mounting surface, the structure which becomes fair during operation is to be produced.
- An embodiment of the invention which is important for practical use therefore provides that at least one of the mold parts of a casting mold according to the invention forms a mounting surface on which an attachment can be mounted on the casting after its solidification and the mold core adjoins this molded part, in particular with the cooling mold ,
- the thermal conductivity of the cooling mold should also be many times higher than the thermal conductivity of the molded part imaging the mounting surface.
- the correct position assignment of the chill mold and the remaining portion of the space in the casting casting core can be ensured with ease of use that are formed on the chill and the remaining portion of the casting mold form elements over which the chill mold and the remaining portion of the mold core with each other are connected.
- the cooling mold is used in such a way that it cools a zone of the casting to be produced in the mounting surface, then it is favorable if at least one molding element is formed on the cooling mold and engages in a correspondingly shaped recess of the molding.
- This form element is preferably formed as a projection engaging in the molding.
- the cooling mold which engages in the respective molded part projects beyond the mounting surface to be produced on the casting, so that the formation of burrs or comparable shape defects in the area of the opening of the respective cylinder space is reliably prevented.
- the inner surface of the projection relative to the longitudinal axis of the chill is tapered so that widens the diameter of the opening of the casting core in the direction of the molding, while the demolding of the chill mold from the finished casting can be additionally facilitated.
- the casting core with the cooling mold is held by a punch extending into the casting core.
- This stamp can be used on the one hand for exactly positioned holding of the casting core become.
- such a stamp when it is coupled with a corresponding adjusting device, allows automatic assembly of the casting core itself.
- liners are, for example, made of cast iron prefabricated tubular components whose inner diameter corresponds to the inner diameter of the cylindrical space to be imaged in the engine block and whose inner surfaces in the finished engine block form the running surfaces along which the pistons of the internal combustion engine move during operation. Even with a casting mold according to the invention, liners can be poured into the casting to be produced while simultaneously exploiting the advantages of the invention if the casting core carries on its outer surface a liner to be cast into the casting.
- the single figure shows schematically a mold G for casting an engine block for a in-line four-cylinder internal combustion engine.
- the casting mold 1 is composed of various molded parts 1, 2, 3, 3 and casting cores 4, 5, 6, 7 each consisting of molding sand prefabricated section 8 and a cooling mold 9 are formed.
- shaped part 1 shown in the figure above is a so-called “sole core”, which on the engine block to be cast the mounting surface 10, also called “top DeckFläche” maps, at the in the course of assembly of the engine one not here shown cylinder head is attached.
- the opposite to the molded part 1 arranged molding 2 represents the so-called “crank chamber core”, which images the crankcase on the engine block to be cast.
- the casting cores 4,5,6,7 are each held by a stamp 11,12,13,14.
- the punches 11-14 are coupled to an adjusting device (not shown here), which move them from an assembly position in which the casting cores 4, 5, 6, 7, 7 are mounted on them into the position shown in the figure.
- the front projecting into the respective casting core 4-7 section 15 of the punches 11-14 is formed over the entire height of the cores 4-7 tapered in the direction of the free punch end to the punch 11-14 after completion of the casting process unhindered from the Casting cores 4-7 to be able to pull.
- the molded sand section 8 of the casting cores 4-7 has a cup-like shape, wherein the surrounding of its interior is adapted to the shape of the front portion 15 of the punches 11-14, that the relevant section 15 is positively seated in the interior.
- a respective centrally disposed on the front side of the casting cores 4-7 projection 16 is formed, which in a corresponding shaped recess 17 of the molding 2 engages and is also held positively held therein.
- the monolithic block made of gray iron made of cooling mold 9 associated edge, the section 8 of the cores 4-7 each have a circumferential shoulder 18, in which an annular circumferential, to the section 8 associated front edge of the mold 9 molded projection 19 attacks.
- the cooling molds 9 of the casting cores 4-7 are positively coupled to the section 8 of the respective casting core 4-7 made of molding sand.
- the cooling molds 9 themselves have an annular shape.
- the interior surrounded by them is adapted to the shape of the front, each associated with them portion 15 of the punches 11-14 has, so that the cooling molds 9 are also held positively and substantially free of play on their respective associated punch 11-14 ,
- a circumferential projection 20 is likewise integrally formed on the cooling molds 9, the outer peripheral surface of which, as in the case of the projection 19, merges without failure into the peripheral surface 21 of the main section of the respective cooling mold 9.
- the cooling molds 9 in this case have a tapering in the direction of the free end of its projection 19, slightly conical shape.
- the inner surface of the cooling molds 9 is inclined.
- the conical outer shape of the chill molds 9 facilitates the demoulding of the chill molds 9 from a liner 22, which is held in a form-fitting manner by the respective casting core 4-7 and, after completion of the solidification, remains in the engine block to be cast in the casting mold G.
- the liners 22 surround the cylinder spaces imaged by the casting cores 4-7 in the engine block.
- the height of the projections 20 of the chill molds 9 is dimensioned so that they grip in each case a correspondingly shaped recess 23 of the molded part 1 with casting cores 4-7 and molded parts 1-3 positioned completely in the casting mold G beyond the mounting surface 10. In this way, a degree of formation in the region of the opening of the cylinder chambers of the engine block to be cast is reliably prevented.
- feeders and filling channels are formed in a manner known per se, via which aluminum melt poured into the casting mold G flows into the mold cavity 24 surrounded by the casting mold G.
- the thereby reaching into the cooling molds 9 adjacent areas 25 of the mold cavity 24 melt is extracted over the liner 22 and the respective cooling mold 9 accelerated heat so that it solidifies faster than the present in the other zones of the mold cavity 24 melt.
- a directional, finer-grained microstructure is created, so that the section of the area adjacent to the mounting area 10 which is particularly stressed in this area Engine block safely withstand the occurring in practical operation thermal and mechanical loads.
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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)
Description
Die Erfindung betrifft eine Gießform zum Gießen eines Gussteils, die aus aus Formsand hergestellten Formteilen und Gießkernen zusammengesetzt ist und mindestens einen Gießkern zum Abbilden eines Raums in dem Gussteil aufweist.The invention relates to a casting mold for casting a casting, which is composed of moldings and casting cores made of molding sand and has at least one casting core for imaging a space in the casting.
Gießformen dieser Art werden insbesondere zum Gießen von Motorblöcken für Verbrennungsmotoren verwendet. Dabei formt der Gießkern im Motorblock-Gussteil den jeweiligen Brennraum, während das andere Formteil die Kopffläche des Motorblocks abbildet, auf der bei der Montage als Anbauteil der Zylinderkopf des jeweiligen Verbrennungsmotors erforderlichenfalls aufgesetzt und befestigt wird.Molds of this type are used in particular for casting engine blocks for internal combustion engines. In this case, the casting core in the engine block casting forms the respective combustion chamber, while the other molded part depicts the top surface of the engine block on which the cylinder head of the respective internal combustion engine is placed and fastened, if necessary, during assembly as an attachment.
Gerade im Bereich des Übergangs zwischen dem im Gussteil durch den Gießkern geformten Raum und der Fläche, an der das Anbauteil montiert wird, kann es im praktischen Einsatz zu erheblichen Belastungen durch Einwirken von Wärme oder mechanischen Belastungen kommen. Die daraus resultierenden Spannungen im den Raum in dem betreffenden Bereich umgebenden Gussmaterial können so hoch sein, dass es zu Rissbildung und Brüchen kommen kann. Besonders kritisch ist dieses Problem bei Motorblöcken für moderne Verbrennungsmotoren, die aus Leichtmetall bzw. Leichtmetalllegierungen, wie Aluminium oder einer Aluminiumgusslegierungen, gegossen werden. Aufgrund der immer höheren Anforderungen, die einerseits an die Leistungsfähigkeit und andererseits an die Minimierung des Gewichts solcher Motoren gestellt werden, kommt es gerade im Bereich der dem Zylinderkopf zugeordneten Öffnung des jeweiligen ausgebildeten Zylinder- bzw. Brennraums zu extremen Belastungen, die zu lokalem Materialversagen im Bereich der Innenflächen des Brennraums führen kann. Bei einem mehrzylindrigen Motorblock mit eng benachbart angeordneten Brennräumen sind von diesen Schäden insbesondere die Stege betroffen, durch die die Zylinder zylinderkopfseitig voneinander getrennt sind. Bei modernen Motorkonstruktionen ist gerade in diesem Bereich die Anhäufung von Gussmaterial auf ein Minimum reduziert, um durch eine möglichst nahe Anordnung der Brennräume bei optimierter Energieausnutzung eine möglichst geringe Baulänge des Motorblocks zu erreichen.Especially in the region of the transition between the molded in the casting through the casting core space and the surface on which the attachment is mounted, it can come in practical use to considerable stress by the action of heat or mechanical stress. The resulting stresses in the casting material surrounding the space in the area in question can be so high that cracking and fractures can occur. This problem is particularly critical in engine blocks for modern internal combustion engines, which are cast from light metal or light metal alloys, such as aluminum or an aluminum casting alloys. Due to the ever increasing demands, on the one hand to the Performance and on the other hand to minimize the weight of such engines, it comes just in the region of the cylinder head associated opening of the respective cylinder or combustion chamber formed to extreme loads that can lead to local material failure in the area of the inner surfaces of the combustion chamber. In a multi-cylinder engine block with combustion chambers arranged closely adjacent to each other, the webs are affected by these damages, by means of which the cylinders are separated from one another on the cylinder head side. In modern engine designs, the accumulation of casting material is reduced to a minimum in this area in order to achieve the shortest possible length of the engine block by arranging the combustion chambers as close as possible while optimizing energy utilization.
Es ist versucht worden, die mechanische und thermische Belastbarkeit des Gussmaterials im Bereich der im praktischen Einsatz besonders stark belasteten Abschnitte von Gussteilen dadurch zu verbessern, dass die betreffenden Abschnitte im Zuge der Erstarrung des Gussteils gezielt gekühlt werden, so dass sich dort ein im Hinblick auf die jeweiligen Anforderungen günstiges Gefüge einstellt.Attempts have been made to improve the mechanical and thermal loading capacity of the casting material in the region of the sections of cast parts which are subjected to particularly high loads in practical use in that the sections in question are deliberately cooled in the course of the solidification of the casting, so that there is a problem the respective requirements favorable structure sets.
Zu diesem Zweck werden beispielsweise gemäß dem in der
Praktische Erfahrungen mit dem voranstehend erläuterten, bekannten Verfahren haben gezeigt, dass es erforderlich ist, die Messing-Kokillen vor dem Eingießen der Schmelze in die jeweilige Gießform vorzuwärmen. Andernfalls besteht die Gefahr, dass das mit dem Metall der Kokille in Kontakt kommende Gießmetall zu schnell erstarrt und sich Risse oder Materialbrüche einstellen. Die Notwendigkeit der Vorwärmung der Kokillen führt nicht nur zu einem höheren Fertigungsaufwand, sondern bringt auch das Problem mit sich, dass es nur unter großen Schwierigkeiten möglich ist, in bestimmten, eng umgrenzten Bereichen der Brenn- bzw. Zylinderräume von Verbrennungsmotoren ein bestimmtes, den dort im praktischen Einsatz herrschenden Bedingungen standhaltendes Gefüge zu erzeugen.Practical experience with the above-described known method has shown that it is necessary to preheat the brass molds prior to pouring the melt into the respective mold. Otherwise, there is the danger that the casting metal coming into contact with the metal of the mold will solidify too quickly and cracks or fractures occur. The need to preheat the molds not only leads to a higher production cost, but also brings with it the problem that it is only possible with great difficulty, in certain narrowly defined areas of the combustion or cylinder chambers of internal combustion engines, a specific there in practical use prevailing conditions to maintain a stable structure.
Neben dem voranstehend erläuterten Stand der Technik ist aus der
Aus der
Bei einer aus der
Vor dem Hintergrund des voranstehend erläuterten Standes der Technik bestand die Aufgabe der Erfindung darin, eine Gießform zu schaffen, die es auf einfache Weise ermöglicht, Gussteile zu fertigen, bei denen mindestens ein lokal eng begrenzter Abschnitt mit einem gegenüber dem übrigen Gussteil unterschiedlichen Gefüge ausgebildet ist. Darüber hinaus sollte eine vorteilhafte Verwendung einer solchen Gießform angegeben werden.Against the background of the prior art described above, the object of the invention was to provide a casting mold which makes it possible in a simple manner to produce castings in which at least one locally narrowly defined section is formed with a structure that is different from the rest of the casting , In addition, an advantageous use of such a mold should be specified.
In Bezug auf die Gießform ist diese Aufgabe erfindungsgemäß durch den Gegenstand des Anspruchs 1 gelöst worden. Vorteilhafte Ausgestaltungen dieser Lösung sind in den auf den Anspruch 1 rückbezogenen Ansprüchen angegeben.With regard to the casting mold, this object has been achieved according to the invention by the subject matter of claim 1. Advantageous embodiments of this solution are specified in the dependent claims on claim 1.
In Bezug auf die Verwendung ist die oben genannte Aufgabe erfindungsgemäß durch den Gegenstand des Anspruchs 12 gelöst worden.With regard to use, the above-mentioned object has been achieved according to the invention by the subject-matter of
Bei einer erfindungsgemäßen Gießform ist der den jeweiligen Raum im Gussteil abbildende Gießkern in mindestens zwei Abschnitte aufgeteilt. Der erste Abschnitt ist dabei durch eine Kühlkokille gebildet, während der andere Abschnitt aus üblicherweise im Bereich des Sandguss eingesetztem Formsand besteht. Bei derartigen Formsanden handelt es sich bekanntermaßen um Gemische aus einem in der Regel rieselfähigen Formgrundstoff und einem Binder. Diese Formsandmischung wird in einem Kernformwerkzeug zu dem jeweiligen Formteil bzw. Gießkern geformt und durch eine geeignete mechanische, chemische und/oder thermische Behandlung so verfestigt, dass das erhaltene Teil bzw. der erhaltene Kern eine für den Gießvorgang ausreichende Formstabilität besitzt.In a casting mold according to the invention, the casting core which depicts the respective space in the casting is divided into at least two sections. The first section is formed by a chill, while the other section consists of sand usually used in the sand casting molding sand. Such molding sands are known to be mixtures of a generally free-flowing molding base material and a binder. This molding sand mixture is formed in a core molding tool to the respective molding or casting core and solidified by a suitable mechanical, chemical and / or thermal treatment so that the obtained part or core has a sufficient dimensional stability for the casting process.
Die gemäß der Erfindung als Teil des den Raum abbildenden Gießkern eingesetzte Kühlkokille weist erfindungsgemäß eine vielfach höhere Wärmeleitfähigkeit auf als der Formsand, aus dem der übrige Abschnitt des Gießkerns gefertigt ist. Dementsprechend kommt es in dem Bereich der Gießform, in dem die in die Gießform gegossene Schmelze mit der Kühlkokille in Kontakt kommt, zu einer lokal begrenzten beschleunigten Abkühlung. Durch die Wahl des Materials und des Volumens der Kühlkokille kann dabei die Geschwindigkeit, mit der die lokal begrenzte Abkühlung erfolgt, und die dem Gussmetall jeweils entzogene Wärmemenge unmittelbar beeinflusst werden.The cooling mold used according to the invention as part of the casting core forming the space has according to the invention a much higher thermal conductivity than the molding sand from which the remainder of the casting core is made. Accordingly, in the region of the casting mold in which the melt poured into the casting mold comes into contact with the cooling mold, a locally limited accelerated cooling occurs. By choosing the material and the volume of the chill mold, the speed with which the locally limited cooling takes place and the amount of heat removed from the casting metal can be influenced directly.
Dabei kann durch die Formgebung der Gießkokille die Ausdehnung des Bereichs, über den der gezielt beschleunigte Wärmeentzug erfolgen soll, auf einfache Weise durch die Gestalt der Kokille eingestellt werden. Soll beispielsweise beim Gießen eines Motorblocks das den in dem Motorblock abzubildenden Zylinderraum umgebende Gussmaterial zwecks Ausbildung eines besonders belastbaren Gussgefüges über eine bestimmte Teillänge des Zylinderraums gezielt und massiv abgekühlt werden, so wird dazu der den jeweiligen Zylinderraum abbildende Gießkern mit einer ringförmigen Kühlkokille ausgestattet, deren Höhe unter Berücksichtigung der Wärmewanderung der gezielt abzukühlenden Teillänge des Zylinderraums entspricht.In this case, the expansion of the region over which the purposefully accelerated removal of heat should take place can be adjusted in a simple manner by the shape of the mold by the shaping of the casting mold. If, for example, during the casting of an engine block, the casting material to be imaged in the engine block is purposefully and massively cooled over a specific partial length of the cylinder space, the casting core representing the respective cylinder space is provided with an annular cooling mold whose height taking into account the thermal migration of the selectively cooled partial length of the cylinder chamber corresponds.
Neben der durch die Erfindung geschaffenen Möglichkeit, eine lokal eng begrenzte, gezielte Abkühlung im Bereich der Innenflächen eines in einem Gussteil abzubildenden Raums durchzuführen, besteht ein weiterer für die Praxis wichtiger Vorteil der Erfindung darin, dass die erfindungsgemäß verwendete Kühlkokille vor ihrem Einsatz weder einer besonderen Oberflächenbehandlung unterzogen noch vorerwärmt werden muss. So hat sich gezeigt, dass bei geeigneter Materialwahl und Formgebung die Kühlkokille auf einfache Weise aus dem fertig erstarrten Gussteil entformt werden kann. Darüber hinaus ergibt eine erfindungsgemäß eingesetzte Kokille im Bereich des mit ihr in Kontakt kommenden Gussmaterials eine so gute Oberflächenqualität, dass die Kokille ohne einen Schlichteauftrag in die Gießform eingesetzt werden kann. Dementsprechend kommt bei einer erfindungsgemäßen Gießform das Gussmaterial in unmittelbaren Kontakt mit der Kokille, so dass eine besonders schnelle, durch keine als Isolator wirkende Zwischenschicht behinderte Wärmeabfuhr eintritt.In addition to the possibility created by the invention to perform a locally narrow limited, targeted cooling in the region of the inner surfaces of a cast in a casting room, another important for practice advantage of the invention is that the cooling mold according to the invention used before their use must not be subjected to a special surface treatment or preheated. Thus, it has been shown that with a suitable choice of material and shape, the chill mold can be easily removed from the finished solidified casting. In addition, a mold used according to the invention gives such a good surface quality in the area of the casting material coming into contact with it that the mold can be inserted into the casting mold without a finishing order. Accordingly, in a casting mold according to the invention, the casting material comes into direct contact with the mold, so that a particularly rapid heat removal impeded by any intermediate layer acting as an insulator occurs.
Im Ergebnis ermöglicht die Erfindung so die kostengünstige Herstellung von Gussteilen, bei denen im Bereich eines in den Gussteilen jeweils auszubildenden Raums lokal eng begrenzte Zonen mit einem durch beschleunigte Abkühlung erzeugten Gussgefüge vorhanden sind.As a result, the invention thus enables the cost-effective production of castings, in which locally closely bounded zones with a cast structure produced by accelerated cooling are present in the region of a space to be formed in each case in the castings.
Ihre durch die erfindungsgemäße Ausgestaltung erzielten Eigenschaften machen erfindungsgemäße Gießformen besonders geeignet für das in Großserien durchgeführte Gießen von Motorblöcken für Verbrennungsmotoren, wobei ihre Vorteile insbesondere beim Gießen solcher Motorteile aus Leichtmetall oder Leichtmetalllegierungen, insbesondere aus Aluminium oder Aluminiumgusslegierungen, zum Tragen kommen. Gerade beim Gießen von Motorblöcken wirkt sich die durch die Erfindung geschaffene Möglichkeit einer gezielten und massiven Kühlung in einem eng umgrenzten Teilbereich des jeweiligen Zylinderraums besonders günstig aus. Dies macht sich besonders bemerkbar, wenn es sich bei der gezielt abzukühlenden Zone des Motorblocks um den Bereich handelt, an dem der jeweilige Zylinderraum in die Montagefläche übergeht, auf der der Zylinderkopf des Motors montiert wird. Mit Hilfe der Erfindung ist es gerade dort möglich, das Gussmaterial im Zuge seiner Erstarrung gezielt so abzukühlen, dass dort optimal, den sich im praktischen Einsatz stellenden Anforderungen stets gerecht werdende Materialeigenschaften vorliegen.Their properties achieved by the design according to the invention make casting molds according to the invention particularly suitable for large-scale casting of engine blocks for internal combustion engines, their advantages in particular when casting such engine parts made of light metal or light metal alloys, especially aluminum or cast aluminum alloys, come to fruition. Especially when casting engine blocks, the possibility created by the invention of a targeted and massive cooling in a tightly bounded portion of the respective cylinder chamber has a particularly favorable. This is especially noticeable when the zone of the engine block to be cooled down is around the area act, in which the respective cylinder chamber merges into the mounting surface on which the cylinder head of the engine is mounted. With the aid of the invention, it is precisely there that it is possible to specifically cool the casting material in the course of its solidification in such a way that it optimally satisfies the material properties which are always met in practical use.
Eine gerade im Hinblick auf die Massenfertigung vorteilhafte Variante der Erfindung sieht vor, dass die Kühlkokille aus Gusseisen hergestellt ist. Aus Gusseisen bestehende Kühlkokillen lassen sich kostengünstig herstellen und weisen eine im Hinblick auf das hier angestrebte Bearbeitungsziel günstige Wärmeleitfähigkeit auf.A particularly advantageous in terms of mass production variant of the invention provides that the chill is made of cast iron. Chill molds made of cast iron can be produced inexpensively and have a favorable thermal conductivity with regard to the processing objective sought here.
Aus den bereits erwähnten Gründen ist eine erfindungsgemäße Gießform insbesondere zur Herstellung solcher Gussteile geeignet, bei denen im Bereich eines Übergangs zwischen dem im Gussteil zu erzeugenden Raum und einer Montagefläche ein den dort im Betrieb auftretenden Belastungen gerecht werdendes Gefüge erzeugt werden soll. Eine für die Praxis wichtige Ausgestaltung der Erfindung sieht daher vor, dass mindestens eines der Formteile einer erfindungsgemäßen Gießform an dem Gussteil eine Montagefläche abbildet, an der an dem Gussteil nach dessen Erstarrung ein Anbauteil montierbar ist und der Formkern insbesondere mit der Kühlkokille an dieses Formteil angrenzt. Um die gewünschte lokal begrenzte beschleunigte Abkühlung sicher zu bewirken, sollte dabei die Wärmeleitfähigkeit der Kühlkokille ebenfalls um ein Vielfaches höher sein als die Wärmeleitfähigkeit des die Montagefläche abbildenden Formteils.For the reasons already mentioned, a casting mold according to the invention is particularly suitable for the production of such castings in which, in the region of a transition between the space to be produced in the casting and a mounting surface, the structure which becomes fair during operation is to be produced. An embodiment of the invention which is important for practical use therefore provides that at least one of the mold parts of a casting mold according to the invention forms a mounting surface on which an attachment can be mounted on the casting after its solidification and the mold core adjoins this molded part, in particular with the cooling mold , In order to safely effect the desired locally limited accelerated cooling, the thermal conductivity of the cooling mold should also be many times higher than the thermal conductivity of the molded part imaging the mounting surface.
Die lagerichtige Zuordnung der Kühlkokille und des übrigen Abschnitts des den Raum im Gussteil abbildenden Gießkerns kann bei einfacher Handhabung dadurch sichergestellt werden, dass an der Kühlkokille und dem übrigen Abschnitt des Gießkerns Formelemente ausgebildet sind, über die die Kühlkokille und der übrige Abschnitt des Gießkern formschlüssig miteinander verbunden sind.The correct position assignment of the chill mold and the remaining portion of the space in the casting casting core can be ensured with ease of use that are formed on the chill and the remaining portion of the casting mold form elements over which the chill mold and the remaining portion of the mold core with each other are connected.
Wird die Kühlkokille so eingesetzt, dass sie eine in die Montagefläche übergehende Zone des zu erzeugenden Gussteils kühlt, so ist es günstig, wenn an der Kühlkokille mindestens ein Formelement ausgebildet ist, das formschlüssig in eine entsprechend geformte Ausnehmung des Formteils greift.If the cooling mold is used in such a way that it cools a zone of the casting to be produced in the mounting surface, then it is favorable if at least one molding element is formed on the cooling mold and engages in a correspondingly shaped recess of the molding.
Dieses Formelement wird dabei bevorzugt als in das Formteil greifender Vorsprung ausgebildet. Die auf diese Weise in das betreffende Formteil greifende Kühlkokille überragt in diesem Fall die an dem Gussteil zu erzeugende Montagefläche, so dass die Entstehung von Graten oder vergleichbaren Formfehlern im Bereich der Öffnung des jeweiligen Zylinderraums sicher verhindert ist. Indem die Innenfläche des Vorsprungs gegenüber der Längsachse der Kühlkokille so angeschrägt ist, dass sich der Durchmesser der Öffnung des Gießkerns in Richtung des Formteils erweitert, kann dabei das Entformen der Kühlkokille aus dem fertigen Gussteil zusätzlich erleichtert werden.This form element is preferably formed as a projection engaging in the molding. In this case, the cooling mold which engages in the respective molded part projects beyond the mounting surface to be produced on the casting, so that the formation of burrs or comparable shape defects in the area of the opening of the respective cylinder space is reliably prevented. By the inner surface of the projection relative to the longitudinal axis of the chill is tapered so that widens the diameter of the opening of the casting core in the direction of the molding, while the demolding of the chill mold from the finished casting can be additionally facilitated.
Insbesondere bei der großtechnischen Verwendung einer erfindungsgemäßen Gießform ist es günstig, wenn der Gießkern mit der Kühlkokille von einem in den Gießkern reichenden Stempel gehalten ist. Dieser Stempel kann zum einen zum exakt positionierten Halten des Gießkerns genutzt werden. Darüber hinaus erlaubt ein solcher Stempel dann, wenn er mit einer entsprechenden Stelleinrichtung verkoppelt ist, eine automatische Montage des Gießkerns selbst.In particular, in the industrial use of a casting mold according to the invention, it is advantageous if the casting core with the cooling mold is held by a punch extending into the casting core. This stamp can be used on the one hand for exactly positioned holding of the casting core become. In addition, such a stamp, when it is coupled with a corresponding adjusting device, allows automatic assembly of the casting core itself.
Aufgrund der hohen Verschleißbelastungen, die im Bereich der Laufflächen der Zylinderräume eines Verbrennungsmotors auftreten, ist es vielfach erforderlich, in den Motorblock so genannte "Liner" einzugießen. Bei diesen Linern handelt es sich um beispielsweise aus Grauguss vorgefertigte rohrartige Bauelemente, deren Innendurchmesser dem Innendurchmesser des im Motorblock abzubildenden Zylinderraums entspricht und deren Innenflächen im fertigen Motorblock die Laufflächen bilden, entlang derer sich im Betrieb der Kolben des Verbrennungsmotors bewegt. Auch bei einer erfindungsgemäßen Gießform lassen sich Liner in das zu erzeugende Gussteil bei gleichzeitiger Ausnutzung der Vorteile der Erfindung dann eingießen, wenn der Gießkern auf seiner Außenfläche einen in das Gussteil einzugießenden Liner trägt.Due to the high wear loads that occur in the area of the running surfaces of the cylinder chambers of an internal combustion engine, it is often necessary to pour into the engine block so-called "liner". These liners are, for example, made of cast iron prefabricated tubular components whose inner diameter corresponds to the inner diameter of the cylindrical space to be imaged in the engine block and whose inner surfaces in the finished engine block form the running surfaces along which the pistons of the internal combustion engine move during operation. Even with a casting mold according to the invention, liners can be poured into the casting to be produced while simultaneously exploiting the advantages of the invention if the casting core carries on its outer surface a liner to be cast into the casting.
Nachfolgend wird die Erfindung anhand einer ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert.The invention will be explained in more detail with reference to a drawing illustrating an exemplary embodiment.
Die einzige Figur zeigt schematisch eine Gießform G zum Gießen eines Motorblocks für einen Reihenvierzylinder-Verbrennungsmotor.The single figure shows schematically a mold G for casting an engine block for a in-line four-cylinder internal combustion engine.
Die Gießform 1 ist aus verschiedenen jeweils aus Formsand gefertigten Formteilen 1,2,3 und Gießkernen 4,5,6,7 zusammengesetzt, die aus jeweils einem aus Formsand vorgefertigten Abschnitt 8 und einer Kühlkokille 9 gebildet sind.The casting mold 1 is composed of various molded
Beim in der Figur oben dargestellten Formteil 1 handelt es sich um einen so genannten "Sohlenkern", der an dem zu gießenden Motorblock die Montagefläche 10, auch "Top-DeckFläche" genannt, abbildet, an der im Zuge der Montage des Verbrennungsmotors ein hier nicht dargestellter Zylinderkopf befestigt wird. Das gegenüberliegend zum Formteil 1 angeordnete Formteil 2 stellt den so genannten "Kurbelraumkern" dar, der am zu gießenden Motorblock den Kurbelraum abbildet.When shaped part 1 shown in the figure above is a so-called "sole core", which on the engine block to be cast the mounting
Die Gießkerne 4,5,6,7 werden jeweils von einem Stempel 11,12,13,14 gehalten. Die Stempel 11-14 sind mit einer hier nicht gezeigten Stelleinrichtung verkoppelt, die sie aus einer Montagestellung, in der die Gießkerne 4,5,6,7 auf ihnen montiert werden, in die in der Figur dargestellte Stellung bewegen. Der vordere in den jeweiligen Gießkern 4-7 hineinragende Abschnitt 15 der Stempel 11-14 ist dabei über die gesamte Höhe der Gießkerne 4-7 in Richtung des freien Stempelendes konisch zulaufend ausgebildet, um die Stempel 11-14 nach Abschluss des Gießvorgangs ungehindert aus den Gießkernen 4-7 ziehen zu können.The
Der aus Formsand hergestellte Abschnitt 8 der Gießkerne 4-7 weist eine becherartige Form auf, wobei der von ihm umgebende Innenraum so an die Form des vorderen Abschnitts 15 der Stempel 11-14 angepasst ist, dass der betreffende Abschnitt 15 formschlüssig in dem Innenraum sitzt. An das vordere freie Ende des Abschnitts 15 ist dabei ein jeweils zentrisch auf der Stirnseite der Gießkerne 4-7 angeordneter Vorsprung 16 angeformt, der in eine korrespondierend geformte Ausnehmung 17 des Formteils 2 greift und darin ebenfalls formschlüssig gehalten sitzt.The molded
An seinem gegenüberliegenden, der als monolithischer Block aus Grauguss gefertigten Kühlkokille 9 zugeordneten Rand weist der Abschnitt 8 der Gießkerne 4-7 jeweils einen umlaufenden Absatz 18 auf, in den ein ringförmig umlaufender, an die dem Abschnitt 8 zugeordneten stirnseitigen Rand der Kühlkokille 9 angeformter Vorsprung 19 greift. Auf diese Weise sind die Kühlkokillen 9 der Gießkerne 4-7 formschlüssig mit dem aus Formsand gefertigten Abschnitt 8 des jeweiligen Gießkerns 4-7 verkoppelt.At its opposite, the monolithic block made of gray iron made of cooling mold 9 associated edge, the
Die Kühlkokillen 9 weisen dabei selbst eine ringförmige Gestalt auf. Der von ihnen umgebene Innenraum ist dabei an die Form angepasst, die der vordere, ihnen jeweils zugeordnete Abschnitt 15 der Stempel 11-14 besitzt, so dass die Kühlkokillen 9 ebenfalls formschlüssig und im Wesentlichen spielfrei auf dem ihnen jeweils zugeordneten Stempel 11-14 gehalten sind.The cooling molds 9 themselves have an annular shape. The interior surrounded by them is adapted to the shape of the front, each associated with them
An ihrem dem Formteil 1 zugeordneten oberen Rand ist an die Kühlkokillen 9 ebenfalls jeweils ein umlaufender Vorsprung 20 angeformt, dessen äußere Umfangsfläche wie beim Vorsprung 19 sprungfrei in die Umfangsfläche 21 des Hauptabschnitts der jeweiligen Kühlkokille 9 übergeht.At its upper edge assigned to the molded part 1, a
Die Kühlkokillen 9 weisen dabei eine in Richtung des freien Endes ihres Vorsprungs 19 zulaufende, leicht konische Form auf. Dazu ist die gemeinsame Umfangsfläche 21 der Kühlkokillen 9 um einen Winkel von mindestens 2° gegenüber ihrer mit der Längsachse der Stempel 11-14 zusammenfallenden Längsachse L geneigt. In entsprechender Weise ist auch die Innenfläche der Kühlkokillen 9 geneigt. Die konische äußere Form der Kühlkokillen 9 erleichtert das Entformen der Kühlkokillen 9 aus einem Liner 22, der von dem jeweiligen Gießkern 4-7 formschlüssig gehalten ist und nach Abschluss der Erstarrung in dem in der Gießform G zu gießenden Motorblock verbleibt. In dem zu gießenden Motorblock umgeben die Liner 22 die Zylinderräume, die von den Gießkernen 4-7 in dem Motorblock abgebildet werden.The cooling molds 9 in this case have a tapering in the direction of the free end of its
Die Höhe der Vorsprünge 20 der Kühlkokillen 9 ist so bemessen, dass sie bei fertig in der Gießform G positionierten Gießkernen 4-7 und Formteilen 1-3 jeweils über die Montagefläche 10 hinaus in jeweils eine korrespondierend geformte Ausnehmung 23 des Formteils 1 greifen. Auf diese Weise wird eine Gradbildung im Bereich der Öffnung der Zylinderräume des zu gießenden Motorblocks sicher verhindert.The height of the
In der Gießform G sind in an sich bekannter Weise hier nicht gezeigte Speiser und Füllkanäle ausgebildet, über die in die Gießform G gegossene Aluminiumschmelze in den von der Gießform G umgebenen Formhohlraum 24 fließt. Der dabei in die zu den Kühlkokillen 9 benachbarten Bereiche 25 des Formhohlraums 24 gelangende Schmelze wird über die Liner 22 und die jeweilige Kühlkokille 9 beschleunigt Wärme entzogen, so dass sie schneller erstarrt als die in den anderen Zonen des Formhohlraums 24 vorhandene Schmelze. Dementsprechend entsteht in den Bereichen 25 des zu gießenden Motorblocks ein gerichtetes, feinkörnigeres Gefüge, so dass der in diesem Bereich besonders belastete an die Montagefläche 10 angrenzende Abschnitt des Motorblocks den im praktischen Betrieb auftretenden thermischen und mechanischen Belastungen sicher standhält.In the mold G, feeders and filling channels, not shown here, are formed in a manner known per se, via which aluminum melt poured into the casting mold G flows into the
- 1,2,31,2,3
- Formteilemoldings
- 4-74-7
- Gießkernecores
- 88th
- aus Formsand gefertigter Abschnitt der Gießkerne 4-7made of molding sand section of the casting cores 4-7
- 99
- Kühlkokillechill
- 1010
- Montageflächemounting surface
- 11-1411-14
- Stempelstamp
- 1515
- vorderer Abschnitt der Stempel 11-14front portion of the punches 11-14
- 1616
-
stirnseitiger Vorsprung der Abschnitte 8frontal projection of the
sections 8 - 1717
-
Ausnehmung des Formteils 2Recess of the
molding 2 - 1818
-
Absatz der Abschnitte 8Paragraph of
sections 8 - 1919
- Vorsprung der Kühlkokillen 9Projection of the cooling molds 9
- 2020
- Vorsprung der Kühlkokillen 9Projection of the cooling molds 9
- 2121
- Umfangsfläche des Hauptabschnitts der Kühlkokillen 9Peripheral surface of the main portion of the cooling molds. 9
- 2222
- Linerliner
- 2323
- Ausnehmung des Formteils 1Recess of the molded part 1
- 2424
- Formhohlraummold cavity
- 2525
- zu den Kokillen 9 benachbarte Bereiche des Formhohlraums 24to the molds 9 adjacent areas of the mold cavity 24th
- GG
- Gießformmold
- LL
- Längsachse der Kühlkokille 9Longitudinal axis of the cooling mold 9
Claims (12)
- Casting mould for casting a casting, comprising mould parts (1, 2, 3) produced from moulding sand and casting cores (4, 5, 6, 7) and having at least one casting core (4, 5, 6, 7) for the formation of a space in the casting, characterised in that a section of the casting core (4, 5, 6, 7) intended for forming the space in the casting is formed by a chill (9) which is manufactured from a material of which the thermal conductivity is many times higher than the thermal conductivity of the other section (8) of the casting core (4, 5, 6, 7), consisting of casting sand.
- Casting mould according to Claim 1, characterised in that the chill (9) is manufactured from cast iron.
- Casting mould according to Claim 1 or 2, characterised in that at least one of the mould parts (1) of the casting mould (G) forms an assembly surface (10) at the casting, at which an add-on part can be fitted to the casting after solidification, and in that the mould core (4, 5, 6, 7) adjoins these mould parts (1).
- Casting mould according to Claim 3, characterised in that the thermal conductivity of the chill (9) is many times higher than the thermal conductivity of the mould part (1) forming the assembly surface (10).
- Casting mould according to any one of the preceding claims, characterised in that at least one element (19) is formed on the chill (9) and the other section (8) of the casting core (4, 5, 6, 7), by means of which the chill (9) and the other section (8) of the casting core (4, 5, 6, 7) are connected to one another in positive fit.
- Casting mould according to any one of the preceding claims, characterised in that at least one element (20) is formed on the chill (9), which engages in positive fit into a correspondingly shaped cut-out aperture (23) of the mould part (1).
- Casting mould according to Claim 6, characterised in that the element is formed as a projection (20) engaging in the mould part (1).
- Casting mould according to Claim 7, characterised in that the inner surface of the projection (20) is arranged at an oblique angle in relation to the longitudinal axis (L) of the chill (9).
- Casting mould according to either of Claims 7 and 8, characterised in that the projection engages over the assembly surface (10) into the mould part (1).
- Casting mould according to any one of the preceding claims, characterised in that the casting core (4, 5, 6, 7) is held with the chill (9) by a ram (11, 12, 13, 14) extending into the casting core (4, 5, 6, 7).
- Casting mould according to any one of the preceding claims, characterised in that the casting core (4, 5, 6, 7) carries on its outer surface a liner (22), forming, in the finished casting, the inner wall of the space to be formed by the casting core (4, 5, 6, 7).
- Use of a casting mould (G) formed according to any one of Claims 1 to 11, for the casting of an engine block for a combustion engine.
Priority Applications (1)
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PL07857208T PL2091678T3 (en) | 2006-11-10 | 2007-11-09 | Casting mould for casting a cast part and use of such a casting mould |
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DE102006053404A DE102006053404A1 (en) | 2006-11-10 | 2006-11-10 | Casting mold for casting a casting and use of such a casting mold |
PCT/EP2007/062131 WO2008055973A1 (en) | 2006-11-10 | 2007-11-09 | Casting mould for casting a cast part and use of such a casting mould |
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EP2091678A1 EP2091678A1 (en) | 2009-08-26 |
EP2091678B1 true EP2091678B1 (en) | 2015-05-13 |
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US (1) | US20100139884A1 (en) |
EP (1) | EP2091678B1 (en) |
JP (1) | JP2010509070A (en) |
KR (1) | KR20090077949A (en) |
CN (1) | CN101547760B (en) |
DE (2) | DE102006053404A1 (en) |
MX (1) | MX2009004733A (en) |
PL (1) | PL2091678T3 (en) |
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US20220241847A1 (en) * | 2021-02-01 | 2022-08-04 | GM Global Technology Operations LLC | Profile chill for forming a cast device |
US11554413B2 (en) * | 2021-02-01 | 2023-01-17 | GM Global Technology Operations LLC | Hybrid cam bore sand core with metal chills for cast aluminum block |
KR102609755B1 (en) | 2023-02-06 | 2023-12-05 | 주식회사 한국귀금속보석 | Casting frame with adjustable weight |
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JPH06114540A (en) * | 1992-10-05 | 1994-04-26 | Hitachi Metals Ltd | Casting method using sand core |
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-
2006
- 2006-11-10 DE DE102006053404A patent/DE102006053404A1/en not_active Withdrawn
-
2007
- 2007-11-09 JP JP2009535740A patent/JP2010509070A/en active Pending
- 2007-11-09 KR KR1020097009573A patent/KR20090077949A/en not_active Application Discontinuation
- 2007-11-09 DE DE202007018797U patent/DE202007018797U1/en not_active Expired - Lifetime
- 2007-11-09 EP EP07857208.8A patent/EP2091678B1/en active Active
- 2007-11-09 RU RU2009122220/02A patent/RU2432223C2/en active
- 2007-11-09 MX MX2009004733A patent/MX2009004733A/en not_active Application Discontinuation
- 2007-11-09 PL PL07857208T patent/PL2091678T3/en unknown
- 2007-11-09 CN CN2007800418754A patent/CN101547760B/en active Active
- 2007-11-09 US US12/513,757 patent/US20100139884A1/en not_active Abandoned
- 2007-11-09 WO PCT/EP2007/062131 patent/WO2008055973A1/en active Application Filing
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JPS57193266A (en) * | 1981-05-25 | 1982-11-27 | Toyota Central Res & Dev Lab Inc | Metallic mold for casting |
JPH06114540A (en) * | 1992-10-05 | 1994-04-26 | Hitachi Metals Ltd | Casting method using sand core |
Also Published As
Publication number | Publication date |
---|---|
RU2432223C2 (en) | 2011-10-27 |
EP2091678A1 (en) | 2009-08-26 |
MX2009004733A (en) | 2009-06-22 |
PL2091678T3 (en) | 2015-10-30 |
DE202007018797U1 (en) | 2009-04-23 |
US20100139884A1 (en) | 2010-06-10 |
DE102006053404A1 (en) | 2008-05-15 |
CN101547760A (en) | 2009-09-30 |
RU2009122220A (en) | 2010-12-20 |
CN101547760B (en) | 2013-04-10 |
JP2010509070A (en) | 2010-03-25 |
KR20090077949A (en) | 2009-07-16 |
WO2008055973A1 (en) | 2008-05-15 |
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