EP0933151B1 - Moule pour la fabrication de pièces coulées - Google Patents

Moule pour la fabrication de pièces coulées Download PDF

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Publication number
EP0933151B1
EP0933151B1 EP98120098A EP98120098A EP0933151B1 EP 0933151 B1 EP0933151 B1 EP 0933151B1 EP 98120098 A EP98120098 A EP 98120098A EP 98120098 A EP98120098 A EP 98120098A EP 0933151 B1 EP0933151 B1 EP 0933151B1
Authority
EP
European Patent Office
Prior art keywords
casting
mould
runner
gravity
channel
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.)
Expired - Lifetime
Application number
EP98120098A
Other languages
German (de)
English (en)
Other versions
EP0933151A1 (fr
Inventor
Rolf Dipl.-Ing. Heinemann
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Volkswagen AG filed Critical Volkswagen AG
Publication of EP0933151A1 publication Critical patent/EP0933151A1/fr
Application granted granted Critical
Publication of EP0933151B1 publication Critical patent/EP0933151B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates

Definitions

  • the invention relates to a casting mold for producing castings, in particular cylinder heads, Cylinder blocks, gearbox housings and / or crankcases for internal combustion engines, from a cast metal by means of increasing casting with mold outer parts and at least a core, which form a mold cavity for the casting, at least a feeder for forming a pressure mass and a casting run is formed, which is connected via an opening to the mold cavity, according to the preamble of the claim 1.
  • the invention further relates to a method for producing castings, in particular Cylinder heads, cylinder blocks, gear housings and / or crankcases for internal combustion engines, from a cast metal by means of increasing casting with molded outer parts and at least one core, which form a mold cavity for the casting, wherein at least one feeder is formed to form a pressure mass and a casting run is, which is connected via an opening to the mold cavity, according to the preamble of claim 8.
  • the present invention is therefore based on the object of an improved casting mold and to provide an improved method of the above type, the the disadvantages mentioned above are overcome.
  • a casting mold that the casting run is on a lowest point of the mold cavity in the direction of gravity through this in shape extends a channel and the opening of the pouring barrel at one of the deepest in the direction of gravity Point of the channel is formed.
  • DE-A-2 218 256 describes a pouring system which prevents contamination how slaughter can get into the mold cavity.
  • sections of the pouring channel leading to the mold cavity at its deepest Job are sections of the pouring channel leading to the mold cavity at its deepest Job.
  • the positioning of the mold cavity relative to the runner channel is not removable, not even whether a feeder is provided to form a pressure mass.
  • this corresponds to the uniform filling of the mold cavity a length of the casting run of a length extension extending through the mold cavity of the casting.
  • a large passage area for the casting material, a more homogeneous and uniform Distribution in the mold cavity and a further improved separation of bubbles, oxides and other undesirable impurities are achieved by the channel in Gravity direction is open at the bottom, being vertically downwards in the direction of gravity extending side walls of the channel at their end faces from a bottom of the molding space are spaced such that the opening from the casting run to the mold cavity between the end faces of these side walls and the bottom in the form of respective Longitudinal slots is formed.
  • the side walls work with their entire vertical Length like a diving separator.
  • Uniform filling of the mold cavity over the entire length of the channel is achieved in that the pouring run through the mold cavity with respect to gravity extends essentially horizontally or on a geodetic line.
  • the casting run is in a casting run core educated.
  • the casting barrel core is expediently a cylinder bore core if it is at the casting is a crankcase. Furthermore, the casting to be cast is preferred with respect to the direction of gravity arranged overhead.
  • the species are on a in the direction of gravity impurities present in a casting material at the deepest bottom of the mold cavity, such as bubbles and / or oxides, are retained and collected.
  • the preferred embodiment shown in FIGS. 1 and 2 of an inventive Casting mold comprises a base plate 10 and lateral mold outer parts 12 and 14. Between these parts are further arranged cores such that a mold cavity 16 is formed is in which pouring material is poured during the casting process, which solidifies and the cast body, in the illustration, for example, forms a crankcase.
  • the cores include, among other things, a water core 18, a cylinder bore core 20, or a plurality of oil return cores 22 and one or more crank chamber cores 24.
  • These cores 18, 20, 22 and 24 are formed, for example, as sand cores bound with chemical agents, which disintegrate after the pouring process, so that the then loose sand is only blown out must become.
  • the outer mold parts 14 and 12 can also be made of chemically bound Sand or steel or plastic can be made.
  • the casting material for example a metal, such as aluminum, or a metal alloy, such as an aluminum alloy, is supplied to the mold and through a casting run 28 to a lower end of the casting mold in the direction of gravity 30 directed.
  • the casting material emerges from the casting barrel 28 and penetrates into the mold cavity 16 a where it rises against the direction of gravity 30 and fills the mold cavity 16, until it gets into feeder 32 and is collected.
  • the base plate 10 When casting, it is important that the casting material cools quickly so that it is even and forms void-free structure. For this reason, the base plate 10 is preferred water or air cooled. It is also preferred to use a print mask above the feeder 32 the pressure mass formed by these additionally with a pressure of, for example 0.1 bar or more applied. However, this preferably occurs in the contact area of the casting material with the bottom 34 of the base plate 10 to form bubbles and Oxides which would rise with the molding material in the mold cavity 16 and which Impair the microstructure when the casting material cools.
  • an end section of the casting run 28 is designed as a channel 36, which is essentially on an entire longitudinal extent of the casting deepest region of the bottom 34 in the direction of gravity 30 through the mold cavity 16 extends, as can be seen in particular from FIG. 2.
  • the channel 36 runs with respect to Gravity direction 30 substantially horizontally or on a geodetic line.
  • the channel 36 is at the bottom in the direction of gravity 30 open, so that its side walls form an inverted U.
  • the legs of the U's form vertical side walls with respect to gravity, which in the direction of gravity 30 run down and end with end faces 38 spaced from the floor 34.
  • the channel 36 is as Part of the cylinder bore core 20 is formed.
  • the casting and the collecting The next step of contaminants is that at the bottom 34 of the cast material trained impression of the channel 36 removed, with which any existing in the casting material Impurities are removed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Mold Materials And Core Materials (AREA)
  • Pens And Brushes (AREA)
  • Adornments (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Claims (9)

  1. Moule de coulée pour la fabrication de pièces coulées, en particulier de culasses de cylindres, de blocs-cylindres, de carters de boítes de vitesses et/ou de carters moteur pour moteurs à combustion interne, à partir d'un matériau de coulée au moyen d'une coulée en source avec des parties de moule extérieures (10, 12, 14) et au moins d'un noyau (18, 20, 22, 24), qui constituent un espace creux du moule (16) pour la pièce coulée, au moins une masselotte (32) étant réalisée pour la formation d'une gueuse sous pression et un canal de coulée (28) étant réalisé, lequel est connecté à l'espace creux du moule (16) par le biais d'une ouverture (42),
    caractérisé en ce que
    le canal de coulée (28) s'étend en forme de canal (36) au niveau d'un endroit (34) le plus profond de l'espace creux du moule (16) dans la direction de la force de gravité, à travers celui-ci, et l'ouverture (42) du canal de coulée (28) est réalisée en un endroit le plus profond du canal (36) dans la direction de la force de gravité (30).
  2. Moule de coulée selon la revendication 1,
    caractérisé en ce que
    une longueur du canal de coulée (28) s'étendant à travers l'espace creux du moule (16) correspond à une expansion en longueur de la pièce coulée.
  3. Moule de coulée selon la revendication 1 ou 2,
    caractérisé en ce que le canal (36) est ouvert en bas dans la direction de la force de gravité (30), les parois latérales du canal (36), s'étendant verticalement vers le bas dans la direction de la force de gravité (30) étant espacées au niveau de leurs côtés de bout (38) d'un fond (34) de l'espace creux du moule (16) de telle sorte que l'ouverture (42) du canal de coulée (28) à l'espace creux du moule (16) soit réalisée sous la forme de fentes longitudinales respectives entre les faces de bout (38) de ces parois latérales et le fond (34).
  4. Moule de coulée selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le canal de coulée (28) s'étend, par rapport à la force de gravité, essentiellement horizontalement ou sur une ligne géodésique à travers l'espace creux du moule (16).
  5. Moule de coulée selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le canal de coulée (28) est réalisé dans un noyau de canal de coulée (20).
  6. Moule de coulée selon la revendication 5,
    caractérisé en ce que
    la pièce coulée est un carter moteur et le noyau de canal de coulée est un noyau d'alésage de cylindre (20).
  7. Moule de coulée selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la pièce à couler est disposée en hauteur par rapport à la direction de la force de gravité (30).
  8. Procédé pour la fabrication de pièces coulées, en particulier de culasses de cylindres, de blocs-cylindres, de carters de boítes de vitesses et/ou de carters moteur pour moteurs à combustion interne, à partir d'un matériau de coulée au moyen d'une coulée en source avec des parties de moule extérieures (10, 12, 14) et au moins un noyau (18, 20, 22, 24), qui constituent un espace creux du moule (16) pour la pièce coulée, au moins une masselotte (32) étant réalisée pour la formation d'une gueuse sous pression et un canal de coulée (28) étant réalisé, lequel est connecté à l'espace creux du moule (16) par le biais d'une ouverture (42),
    caractérisé en ce que
    des impuretés présentes dans un matériau de coulée, comme par exemple des bulles et/ou des oxydes, sont retenues et rassemblées au niveau d'un fond (34) de l'espace creux du moule (16) se trouvant au niveau le plus bas dans la direction de la force de gravité.
  9. Procédé selon la revendication 8,
    caractérisé en ce que
    après la fabrication de la pièce coulée, on élimine une partie formée à partir du matériau de coulée, qui contient les impuretés rassemblées.
EP98120098A 1998-01-31 1998-10-24 Moule pour la fabrication de pièces coulées Expired - Lifetime EP0933151B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803866 1998-01-31
DE19803866A DE19803866A1 (de) 1998-01-31 1998-01-31 Gießform und Verfahren zum Herstellen von Gußstücken

Publications (2)

Publication Number Publication Date
EP0933151A1 EP0933151A1 (fr) 1999-08-04
EP0933151B1 true EP0933151B1 (fr) 2003-06-25

Family

ID=7856299

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98120098A Expired - Lifetime EP0933151B1 (fr) 1998-01-31 1998-10-24 Moule pour la fabrication de pièces coulées

Country Status (3)

Country Link
EP (1) EP0933151B1 (fr)
AT (1) ATE243579T1 (fr)
DE (2) DE19803866A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10014591C1 (de) * 2000-03-27 2001-08-02 Actech Gmbh Adv Casting Tech Verfahren zum steigenden Gießen in Sandformen mit gerichteter Erstarrung von Gußteilen
DE10063357B4 (de) * 2000-12-19 2005-09-15 Hydro Aluminium Mandl&Berger Gmbh Gießform für und Gießverfahren zur Herstellung von Motorblöcken aus Leichtmetall-Werkstoffen
DE102009058730B8 (de) * 2009-12-17 2021-05-20 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Herstellung eines Motorblocks
CN103769559B (zh) * 2014-02-19 2016-01-13 重庆擎一模具制造有限公司 多点孤立热节大型齿轮箱体低压铸造模具
DE102014203699A1 (de) 2014-02-28 2015-09-03 Bayerische Motoren Werke Aktiengesellschaft Verfahren für die herstellung eines gusskerns für die fertigung von zylinderköpfen
DE102016220240A1 (de) 2015-10-15 2017-04-20 Volkswagen Aktiengesellschaft Rotationsgießverfahren
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
DE102018128021A1 (de) * 2018-11-09 2020-05-14 Bayerische Motoren Werke Aktiengesellschaft Kokille sowie Verfahren zum Herstellen eines Kurbelgehäuses

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844334A (en) * 1970-03-17 1974-10-29 Mcculloch Corp Method of casting cylinders
DE2128425A1 (de) * 1970-08-21 1973-01-04 Friedhelm Dipl Ing Kahn Giessverfahren mit druckanwendung und einrichtung zur durchfuehrung des verfahrens
US3851701A (en) * 1971-05-10 1974-12-03 Steel Corp Gas venting in the manufacture of chilled rolls
DE2218256B2 (de) * 1972-04-15 1975-01-02 Buderus'sche Eisenwerke, 6330 Wetzlar ElnguBsystem
US4791977A (en) * 1987-05-07 1988-12-20 Metal Casting Technology, Inc. Countergravity metal casting apparatus and process
DE3924742A1 (de) * 1989-07-26 1991-01-31 Alcan Gmbh Niederdruck-kokillen-giessverfahren zum giessen von metallgussteilen
DE19533447C1 (de) * 1995-09-09 1996-12-05 Bbs Kraftfahrzeugtechnik Verfahren und Vorrichtung zum Befüllen eines Gießwerkzeugs mit einer Metallschmelze
DE19533529C2 (de) * 1995-09-11 2001-10-11 Vaw Alucast Gmbh Verfahren zum Gießen eines Motorblockes aus Aluminium

Also Published As

Publication number Publication date
ATE243579T1 (de) 2003-07-15
EP0933151A1 (fr) 1999-08-04
DE59808810D1 (de) 2003-07-31
DE19803866A1 (de) 1999-08-05

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