EP2399692B1 - Moule pour la coulée d'éléments en coulée à partir d'un métal en fusion - Google Patents

Moule pour la coulée d'éléments en coulée à partir d'un métal en fusion Download PDF

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Publication number
EP2399692B1
EP2399692B1 EP20110171279 EP11171279A EP2399692B1 EP 2399692 B1 EP2399692 B1 EP 2399692B1 EP 20110171279 EP20110171279 EP 20110171279 EP 11171279 A EP11171279 A EP 11171279A EP 2399692 B1 EP2399692 B1 EP 2399692B1
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EP
European Patent Office
Prior art keywords
mould
mold
casting
package
permanent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20110171279
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German (de)
English (en)
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EP2399692A1 (fr
Inventor
Rolf Dr. Gosch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nemak Linz GmbH
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Nemak Linz GmbH
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Filing date
Publication date
Application filed by Nemak Linz GmbH filed Critical Nemak Linz GmbH
Publication of EP2399692A1 publication Critical patent/EP2399692A1/fr
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Publication of EP2399692B1 publication Critical patent/EP2399692B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B22C9/103—Multipart cores

Definitions

  • the invention relates to a casting mold for casting a casting from a molten metal, wherein the casting mold comprises a permanent casting mold, which is composed of at least two permanent mold parts delimiting the cavity of the permanent casting mold from the environment, which remain intact when the casting is removed from the mold.
  • Continuous casting molds of this type also known as "casting molds" in technical terminology, are used, for example, in mass production to cast cylinder heads for internal combustion engines from an aluminum melt.
  • Casting molds which are partly formed from a permanent mold and partly from a lost mold, are known in principle.
  • a mold for producing metallic Hohlg manlingen comprises a mold and a sand mold.
  • the hollow casting in question is a cylinder liner intended for a large engine and has a cylindrical basic shape.
  • the mold has a first shaping surface, while the sand mold has the remaining significant shaping surfaces of the mold. Accordingly, the mold encloses no own mold cavity, but forms in the manner of a shell only the continuation of the shape space, which is bounded by the rest of the sand mold.
  • the outer shape of the hollow casting to be produced is determined jointly by the mold and the sand mold.
  • the object of the invention was to provide a way, a complex shaped component, as it represents a cylinder head with a molded on the type of the above cylinder head design turbocharger housing, reliable in high volumes and cost casting technology to finished.
  • a casting mold according to the invention for casting a casting from a molten metal comprises a permanent casting mold which is composed of at least two permanent mold parts.
  • the permanent moldings delimit the mold cavity of the permanent mold from the environment.
  • the permanent moldings are characterized by the fact that they are not destroyed during removal of the casting, but preserved and can be reused accordingly for many casting runs.
  • casting molds or molded parts can also be positioned as usual in a casting mold according to the invention in the permanent mold within the mold cavity, which as a result of targeted mechanical force or the thermal stresses occurring during casting fall into many free-flowing items. Casting cores of this type are required, for example, in permanent casting molds if channels, cavities, etc. are to be formed within the respective casting.
  • this mold package consists of a material which breaks when the cast part is completely removed from the mold and surrounds a mold cavity section.
  • the mold cavity section surrounded by the mold package is in communication with the mold cavity of the permanent mold such that melt filled into the mold cavity of the permanent mold passes into the mold cavity section of the mold package and vice versa.
  • the permanent casting mold is supplemented by a mold package which, viewed individually, is designed in the manner of a lost casting mold and is newly created for each casting process.
  • a mold package which, viewed individually, is designed in the manner of a lost casting mold and is newly created for each casting process.
  • the invention combines the advantages of a Continuous casting mold with the advantages of a molded package designed as a lost mold. Since the volume of the functional part respectively imaged by the mold package is small compared to the volume that is imaged in the mold cavity surrounded by the permanent mold parts, the expense to be taken into account for producing the mold package is also in relation to the advantages resulting from the design according to the invention a mold can be achieved, low.
  • the mold package associated parts of the permanent mold and the mold package can be designed so that in the finished composite permanent mold the mold package is applied to an outer surface of the permanent mold.
  • a separate seal may be provided for sealing the existing between the permanent mold and the mold package joining gap. This can for example also be arranged so that it acts between the peripheral wall of the opening, which is associated with the mold package, and a corresponding surface of the mold package.
  • At least one first mold element and formed on at least one of the permanent mold parts corresponding to the first mold element second molded element may be formed on the mold package, the form-fitting with the mold element of the mold package interacts.
  • the respective shaping elements acting in the manner of core marks can be designed such that they not only define the position of the mold package in relation to the permanent moldings, but also ensure a captive hold of the mold package on the associated permanent moldings.
  • the opening of the permanent mold associated with the mold package may contribute to the proper alignment of the mold package when the opening of the permanent mold associated with the mold package widens, at least in sections, starting from the mold cavity of the permanent mold in the direction of the outer surface of the permanent mold.
  • the opening is then designed in the manner of a funnel in such a way that the mold package inserted into the opening is automatically aligned during its mounting on the surfaces of the widening sections lying against it.
  • the edge region which surrounds the opening associated with the mold package be at least partially conically tapered in the direction of the mold cavity of the permanent mold or designed in the manner of a throat.
  • the mold package forming the functional element to be molded will typically be composed of two or more moldings or mold cores.
  • the mold package can image a functional part which is integrally connected to the cylinder head with the cylinder head completely cast and has at least one channel which is connected without interruption to a channel of the cylinder head is.
  • a functional part may be, for example, the housing or a housing part of a turbocharger.
  • the mold package may, for example, moldings, through which the outer shape of the housing or housing part is determined, and mold cores, which image the exhaust passage and an optionally additionally provided cooling fluid channel in the housing.
  • the mold package then comprises a first mold core which images a water channel of the functional part connected to the water jacket of the cylinder head to be cast, and a second mold core which images an exhaust gas duct connected to an exhaust pipe of the cylinder head.
  • a casting mold in which a permanent casting mold according to the invention is supplemented by a mold package which is made from a mold material that breaks down into many individual parts during demoulding, is particularly suitable for producing castings from a light metal melt, in particular an aluminum melt, since it is in use such light metal melts can take advantage of the chill casting in combination with the advantages of the mold package, for example, to produce complex cylinder head designs for internal combustion engines, which on the one hand optimal functional integration and on the other hand minimize production costs.
  • At least one mold element for imaging a Domingakugoos be provided on the casting.
  • a first reception point or several such initial reception points are used in particular in automated machining as a starting point for the measurement of the geometry of the respective casting.
  • the Clearage determine the "zero points" for the alignment of the machining tool or the respective workpiece to be machined in the x-, y- and z-direction.
  • the casting mold comprises a permanent casting mold 1, which is mounted on a carrier plate 2.
  • the carrier plate 2 is arranged for example on a transport system, not shown, which transports the permanent mold 1 to a casting station, also not shown here.
  • the permanent casting mold 1 is composed of a molded part 3, which is usually made of molding sand, and of several permanent casting moldings, of which the permanent mold parts 4, 5, 6 are visible here.
  • the molded part 3 forms the cover, the permanent mold part 4 a first side wall, the permanent mold part 6 a second side wall and the permanent mold part 5 a bottom of the permanent mold 1.
  • the permanent mold parts of the permanent mold 1 can be made in a known manner from a suitable steel, the sun High temperature and wear resistant is that the permanent moldings can be reused for a large number of casting operations.
  • the permanent mold parts of the mold 1 define a mold cavity 7 of the mold 1 with respect to the environment U and have on their the mold cavity 7 associated side mold elements 8.9, through which the outer shape of the cylinder head to be cast is displayed.
  • a larger number of mandrels are inserted in the mold cavity 7 of the casting mold 1, of which in Fig. 2 the mandrels 10,11,12 are visible.
  • the mandrel 10 forms in the in Fig. 2 illustrated position of the mold 1 from the upper region of the water jacket channel of the cylinder head to be cast off, while the mandrel 11 forms the lower part of this water jacket channel.
  • the mold core 12 which is arranged at a distance between the mold cores 10, 11, forms an exhaust gas duct integrated into the cylinder head to be cast, by means of which, in accordance with FIG EP 2 143 926 A1 described development, the exhaust gas outlets of the cylinder head to be cast are performed together to an outlet opening.
  • the one side wall of the mold 1 forming permanent mold part 5 is formed starting from the edge, which is assigned to the lid of the permanent mold 1 forming mold part 3, an opening 13 which extends in the direction of the opposite edge.
  • the mandrels 10,11,12 are each designed so that they end at the opening 13 and project into the opening 13 of the mold 1.
  • the width of the opening 13 is at the same time dimensioned so that it receives a projection 20 of a mold package 21, which is arranged on the outside of the permanent mold part 6.
  • This projection 20 of the mold package 21 fills the opening 13 of the permanent mold 1 completely and lies with its laterally beyond the projection 20, the permanent mold part 6 associated wall surfaces close to the outer surface of the permanent mold part 6.
  • the split in the vertical direction in the present embodiment mold package 21 is composed of a plurality of mold parts 22,23 and mold cores 24,25, which are each made in known manner from a per se also known, mixed with a suitable binder molding sand.
  • the mold part 22 forms one half of the block-shaped mold package 21 in the assembled state, while the other half of the mold package 21 is formed by the mold part 23.
  • the mold parts 22, 23 enclose a mold cavity section 26 in which the mold cores 24, 25 are arranged and which is open in the area of the end face of the projection 20 seated in the opening 13 of the mold 1 for the mold cavity 7 delimited by the permanent mold parts 4-6.
  • the mold package 21 is used for the simultaneous integral casting of a housing for an exhaust gas-driven, provided with a water-cooled turbocharger to be poured in the permanent mold 1 cylinder head.
  • the one Mold core 24 of the mold package 21 forms a water jacket channel of the housing to be cast.
  • the mandrel 24 has a curved shape in the manner of a spiral or a screw. That in the representation in Fig. 2 lower end 27 of the mandrel 24 is to be positioned and shaped so that this end flush with its face fully flushed and accurately positioned at its associated end face of the mandrel 11 in sitting at the permanent mold part 6 mold package 21, the lower part of the water jacket to be cast Cylinder head maps.
  • the second mold core 25 of the mold package 21 forms a waste gas channel which is hot in practical use and is seated in the space delimited by the mold core 24 and likewise has a helical shape. His in the presentation in Fig. 2 lower end portion 30 is positioned and shaped so that its face flush over its entire surface at the associated end face of the Mold core 12 is applied, which images the integrated exhaust duct of the cylinder head to be cast.
  • peg-shaped projection 31 whose longitudinal axis L is usually parallel to the flat outer surface of the permanent mold part 6 extends.
  • the projection 31 is seated with its free end positively in a correspondingly shaped, not visible here recess of the molding 22 and forms at the housing to be cast from an outlet from which can later accommodate the impeller of the turbocharger.
  • Both between the mold cavity portion 26 delimiting inner surfaces 32 of the mold parts 22,23 and the outer surface 34 facing them of the mold core 24 and between the inner, the mold core 25 facing surface 35 of the mold core 24 and the mold core 24 facing peripheral surface 36 is continuous a substantially constant distance. Accordingly, in the mold cavity portion 26 of the mold package 21, a first spiral outer channel 37 and, separated therefrom, a second, likewise spiral, inner channel 38 are formed. Both channels 37, 38 are connected to the permanent mold part 6 mounted mold package 21 with their one as with their other end each uninterruptible with a free, not occupied by mandrels area of the mold cavity 7 of the permanent mold 1.
  • the melt flows in Reaching a certain filling level without interruption in the channels 37,38 of the mold package 21 until they are also completely filled.
  • cylinder head formed in the outer channel 38 light metal correspondingly forms the outer wall of the integrally cast on the cylinder head housing for the turbocharger, while the material solidified in the channel 37 by the Mold core 24 demarcated water jacket of the turbocharger housing relative to the illustrated by the mold core 25 exhaust passage of the turbocharger.
  • the demolding of the cast on the cylinder head turbocharger housing is done in a conventional manner in that the mold parts 22,23 and the mandrels 24,25 are destroyed by the action of external forces. This can be done for example by shaking the cylinder head, as is usually carried out to destroy the sitting in the mold cavity 7 mandrels 10 - 12 and trickle out of the finished cylinder head.
  • the positionally correct orientation of the mold package 21 on the permanent mold part 6 or in the opening 13 can also be supported by the fact that the edge surface portions surrounding the opening 13 at least in the region of Fig. 2 Lower edge portion 14 is tapered starting from its the mold cavity 7 associated edge in the direction of the outer surface of the permanent mold part 6 so that the opening 13 extends at least in this area in the direction of the environment U in the manner of a funnel, the opening 13 in the direction of the mold cavity 7 so narrowed conically.
  • the edge surface 14 associated surface portion of the protrusion 20 of the mold package 21 is chamfered in a corresponding manner, the mold package 21 centered in his finished positioned on the permanent mold part 6 position at least in the direction of the height of the mold 1 automatically.
  • the mold package 21 is supported by a bracket 41.
  • the support plate 2 may be formed in a conventional manner, a core mark on which the mold package 21 is fixed positively with respect to its position relative to the associated permanent mold part 6.

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

Claims (14)

  1. Moule de coulée (1) servant à mouler une pièce moulée à partir d'un bain de métal en fusion, comprenant un moule de coulée permanent qui est composé au moins de deux parties (4-6) du moule de coulée permanent délimitant la cavité (7) du moule de coulée permanent par rapport à l'environnement (U), parties du moule de coulée permanent qui restent intactes lors du démoulage de la pièce moulée,
    caractérisé en ce qu'une ouverture (13) est formée sur le moule de coulée permanent, ouverture à laquelle est rattaché un ensemble de moule (21) qui se compose d'un matériau se cassant lors du démoulage de la pièce moulée et entoure une partie (26) de la cavité du moule qui est combinée avec la cavité (7) du moule de coulée permanent, de sorte que le bain de fusion rempli dans la cavité (7) du moule de coulée permanent passe dans les parties (26) de la cavité du moule de l'ensemble (21) du moule et inversement.
  2. Moule de coulée selon la revendication 1, caractérisé en ce que l'ensemble (21) du moule vient en appui sur une surface extérieure du moule de coulée permanent.
  3. Moule de coulée selon l'une ou l'autre des revendications précédentes, caractérisé en ce qu'au moins un premier élément de moule (39) est configuré sur l'ensemble (21) du moule et un second élément de moule (40) formé en correspondant au premier élément (39) du moule est configuré sur au moins l'une des parties (4-6) du moule de coulée permanent, second élément de moule qui, par complémentarité de forme, agit de façon conjuguée avec l'élément (39) du moule de l'ensemble (21) du moule.
  4. Moule de coulée selon l'une quelconque des revendications précédentes, caractérisé en ce que l'ouverture (13) associée à l'ensemble (21) du moule s'élargit au moins partiellement à partir de la cavité (7) du moule de coulée permanent, en direction de la surface extérieure du moule de coulée permanent.
  5. Moule de coulée selon la revendication 4, caractérisé en ce que la zone de bordure (14) qui entoure l'ouverture (13) associée à l'ensemble (21) du moule est configurée au moins partiellement en se terminant de façon conique en direction de la cavité (7) du moule de coulée permanent, ou bien configurée comme une gorge.
  6. Moule de coulée selon l'une quelconque des revendications précédentes, caractérisé en ce que l'ensemble (21) du moule est formé par un matériau de moule de type sableux, mélangé avec un liant.
  7. Moule de coulée selon l'une quelconque des revendications précédentes, caractérisé en ce que l'ensemble (21) du moule est composé de deux - ou plus - parties (22, 23) du moule ou noyaux (24, 25) du moule.
  8. Moule de coulée selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est destiné au moulage d'une culasse de cylindre pour un moteur à combustion interne, et en ce que l'ensemble (21) du moule représente une pièce fonctionnelle qui, lorsque le moulage de la culasse de cylindre est terminé, est assemblée de façon monobloc avec la culasse de cylindre et présente au moins un conduit qui est relié, sans interruption, à un conduit de la culasse de cylindre.
  9. Moule de coulée selon la revendication 8, caractérisé en ce que l'ensemble (21) du moule comprend un premier noyau de moule (24) qui représente un conduit d'eau de la pièce fonctionnelle, relié à la chemise d'eau de la culasse de cylindre à mouler, et comprend un second noyau de moule (25) qui représente un conduit des gaz d'échappement de la pièce fonctionnelle, relié à un conduit de la culasse de cylindre acheminant les gaz d'échappement.
  10. Moule de coulée selon l'une des revendications 8 ou 9, caractérisé en ce que la pièce fonctionnelle est une pièce de carter pour un turbocompresseur.
  11. Moule de coulée selon l'une quelconque des revendications précédentes, caractérisé en ce que l'ensemble (21) du moule est supporté sur un bloc support (41) maintenant le moule de coulée permanent.
  12. Moule de coulée selon l'une quelconque des revendications précédentes, caractérisé en ce que l'ensemble (21) du moule est positionné sur une marque du noyau dans la plaque support (2).
  13. Moule de coulée selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est prévu, sur le moule de coulée, au moins un élément de moule pour la représentation d'un premier point de levage sur la pièce moulée.
  14. Moule de coulée selon la revendication 13, caractérisé en ce qu'il est prévu, sur ledit moule de coulée, un élément de moule qui représente un premier point de levage supplémentaire sur la partie de la pièce moulée, partie qui est représentée dans l'ensemble (21) du moule.
EP20110171279 2010-06-28 2011-06-24 Moule pour la coulée d'éléments en coulée à partir d'un métal en fusion Active EP2399692B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201010025285 DE102010025285A1 (de) 2010-06-28 2010-06-28 Dauergießform zum Gießen von Gussstücken aus einer Metallschmelze

Publications (2)

Publication Number Publication Date
EP2399692A1 EP2399692A1 (fr) 2011-12-28
EP2399692B1 true EP2399692B1 (fr) 2015-02-18

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EP20110171279 Active EP2399692B1 (fr) 2010-06-28 2011-06-24 Moule pour la coulée d'éléments en coulée à partir d'un métal en fusion

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EP (1) EP2399692B1 (fr)
DE (1) DE102010025285A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104741547B (zh) * 2015-04-01 2017-01-11 无锡蠡湖增压技术股份有限公司 一种带热碰模的压气壳用无砂芯金属模具
CN106180577B (zh) * 2016-09-28 2018-11-27 江苏华培动力科技有限公司 双涡流涡壳砂芯无缝组合工艺
CN106424582A (zh) * 2016-10-28 2017-02-22 江苏华培动力科技有限公司 涡轮增压器壳体铸造用砂芯成型工艺
DE102017211876B3 (de) 2017-07-12 2018-08-16 Bayerische Motoren Werke Aktiengesellschaft Kokille sowie Verfahren zum Herstellen eines Bauteils
DE102018128020B4 (de) * 2018-11-09 2024-05-23 Bayerische Motoren Werke Aktiengesellschaft Kokille sowie Verfahren zum Herstellen eines Kurbelgehäuses

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59707494D1 (de) * 1997-04-15 2002-07-18 Waertsilae Schweiz Ag Winterth Giessform und Verfahren zum Herstellen von metallischen Hohlgiesslingen sowie Hohlgiesslinge
DE50303860D1 (de) * 2003-11-28 2006-07-27 Borgwarner Inc Gehäuse für Turbolader
DE202004020207U1 (de) * 2004-12-27 2005-04-07 Univ Magdeburg Tech Einrichtung zum Schwerkraftgießen von Leichtmetallgussteilen im Kokillen-Gießverfahren
US7438117B2 (en) * 2006-01-19 2008-10-21 Gm Global Technology Operations, Inc. Cylinder block casting bulkhead window formation
DE102007004050B4 (de) * 2007-01-22 2010-03-18 Ks Aluminium-Technologie Gmbh Vorrichtung zum Herstellen eines Zylinderkurbelgehäuses
DE102007030482B4 (de) * 2007-06-30 2018-12-20 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kühlkanäle im Zylinderkopf einer Brennkraftmaschine
EP2143922A1 (fr) 2008-07-11 2010-01-13 Ford Global Technologies, LLC Culasse avec collecteur d'échappement et turbocompresseur

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EP2399692A1 (fr) 2011-12-28
DE102010025285A1 (de) 2011-12-29

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