EP1527833B1 - Procédé de fabrication d'une pièce moulée composite et pièce moulée composite - Google Patents

Procédé de fabrication d'une pièce moulée composite et pièce moulée composite Download PDF

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Publication number
EP1527833B1
EP1527833B1 EP20040020965 EP04020965A EP1527833B1 EP 1527833 B1 EP1527833 B1 EP 1527833B1 EP 20040020965 EP20040020965 EP 20040020965 EP 04020965 A EP04020965 A EP 04020965A EP 1527833 B1 EP1527833 B1 EP 1527833B1
Authority
EP
European Patent Office
Prior art keywords
plastic layer
casting
composite casting
during
plastic
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 - Fee Related
Application number
EP20040020965
Other languages
German (de)
English (en)
Other versions
EP1527833A1 (fr
Inventor
Eckard Pueschel
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1527833A1 publication Critical patent/EP1527833A1/fr
Application granted granted Critical
Publication of EP1527833B1 publication Critical patent/EP1527833B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0081—Casting in, on, or around objects which form part of the product pretreatment of the insert, e.g. for enhancing the bonding between insert and surrounding cast metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0009—Cylinders, pistons

Definitions

  • the invention relates to a method for producing a composite casting, wherein an initial part produced in a first step is connected in a further step with a casting material.
  • the output part can be completely or partially encapsulated or cast in a further step with a cast material, as well as only one (area) sprue can be done.
  • the casting materials may be metals with conventional impurities or alloys, in particular also light metals or light metal alloys, such as aluminum or magnesium.
  • the production can be carried out by conventional casting methods such as die casting, chill casting, lost foam casting, sand casting, continuous casting, thixocasting, Squezzecasting or centrifugal casting.
  • the output part may be cylinder liners made of steel, such as gray cast iron, which are cast with light metal or a light metal alloy of aluminum or magnesium.
  • cylinder liners made of steel, such as gray cast iron, which are cast with light metal or a light metal alloy of aluminum or magnesium.
  • hypereutectic aluminum cylinder liners are encapsulated with a hypoeutectic aluminum alloy.
  • connection in the contact area between the starting part and the cast material connected to it has proven to be particularly critical, so that a number of proposed solutions have become known in this regard.
  • the DE 44 34 576 A1 refers to a cast hypoeutectic aluminum-silicon alloy cast cylinder or cylinder block with over-diecast aluminum-silicon alloy over-bushing and, for example, proposes roughening the liners on the outside by means of grooves, grooves, ridges or undulations in order to provide the necessary firm connection of the bushing To ensure Umgusses.
  • connection of the encapsulation to the output part is in the known methods and composite castings either insufficient or can be achieved only with a very large effort in terms of production and costs.
  • the invention is therefore based on the object to ensure a particularly good connection of casting material to an output part at the same time very little effort. For example, in an internal combustion engine, a delay of the cylinder or the crankcase should be effectively avoided, the structural properties of the cast materials should remain unique.
  • the object is achieved by a method having the features of claim 1, which comprises a coating of the starting part at least in the composite region with a plastic layer.
  • the plastic layer burns in a further step, enriched insomniaßgish residue-free, with the combustion only non-toxic substances, such as CO 2 and / or H 2 O are formed. It is particularly advantageous, when the plastic layer during combustion an inert protective gas atmosphere, such as CO 2 forms.
  • the plastic layer releases heat during the further step, the heat release being controllable by a targeted formation of the plastic layer.
  • the heat release being controllable by a targeted formation of the plastic layer.
  • the output part with a plastic layer such as polyethylene, polystyrene or Polyester, wherein the plastic layer is suitably coated, foil, tissue or coating-like and has a thickness of a few microns up to 5 mm, in particular from about 1 to 3 mm.
  • a die casting mold 100 is shown for a not shown crankcase of an internal combustion engine.
  • a light metal alloy for example an aluminum-silicon alloy or a magnesium alloy, is used here as the casting material.
  • the cylinder liners 104 experience a particular stress, so that they consist of a material other than the encapsulation.
  • the cylinder liners 104 are off Gray cast iron or made of a hypereutectic aluminum-silicon alloy, which comprises embedded in the aluminum matrix, uniformly formed and distributed silicon primary crystals.
  • the cylinder liners 204 are - as in FIG. 2 shown - prefabricated as inserts and provided with a plastic layer 206.
  • the plastic layer 206 in the present case consists of polyethylene, styrene or polyester and is applied to the cylinder liners 204.
  • the cylinder liners 204 are provided only radially on the outside with the plastic layer 206, however, it is also considered to be very useful when the insert is coated on all sides. In particular, there is then a good surface protection of the insert up to casting.
  • the plastic layer 206 is formed film, tissue, coating or coating-like.
  • the mold cavity 102 of the pressure casting mold 100 is filled under high pressure with the metallic melt of the encapsulation, burns due to the high temperature of the melt, the plastic layer 206 present non-toxic and residue-free with release of CO 2 and H 2 O.
  • the CO 2 forms a protective gas-like atmosphere which prevents oxide film formation of the casting metal during the casting process. Furthermore, heat is released during the combustion of the plastic layer 206 and thus delays the cooling of the melt front, cold running points are prevented.
  • a non-toxic and / or non-residue-free combustion may possibly also take place. It can be released substances which cause a change in the alloy and / or the structure of the insert and / or the Umgusses in the composite area. Finally, through targeted selection and / or enrichment of the Plastic heat release are particularly controlled.
  • the plastic layer 206 may optionally only partially envelop the insert, such as cylinder liners 204, and / or have a different thickness, a different composition and / or different properties.
  • Plastic-coated inserts according to the invention can be used in conjunction with different casting methods, such as die-casting, chill casting, lost-foam casting, sand casting, continuous casting, thixocasting, squezzecasting or centrifugal casting.
  • the composite casting produced by the method is characterized in particular by a particularly good connection between the casting material and inserts, at the same time the production requires a very low effort compared to other connection improvement measures.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Claims (11)

  1. Procédé de fabrication d'une pièce composite selon lequel, on relie une pièce obtenue par une première étape de procédé, à un matériau de coulée au cours d'une autre étape de procédé,
    caractérisé en ce qu'
    après la première étape et avant l'autre étape, on munit la pièce obtenue (104, 204) d'au moins une zone de liaison ayant une couche de matière plastique (206).
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    la couche de matière plastique (206) est brûlée au cours d'une autre étape.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que la couche de matière plastique (206) brûle au cours de l'autre étape sans laisser de résidu.
  4. Procédé selon les revendications précédentes,
    caractérisé en ce que
    la couche de matière plastique (206) ne dégage que des produits non polluants au cours de sa combustion.
  5. Procédé selon les revendications précédentes,
    caractérisé en ce que
    la couche de matière plastique (206) forme une atmosphère de gaz protecteur au cours de sa combustion.
  6. Procédé selon les revendications précédentes,
    caractérisé en ce que
    la couche de matière plastique (206) brûle en donnant du gaz carbonique CO2 et/ou de l'eau H2O sans laisser de résidu.
  7. Procédé selon les revendications précédentes,
    caractérisé en ce que
    la couche de matière plastique (206) dégage de la chaleur au cours de l'autre étape du procédé.
  8. Procédé selon les revendications précédentes,
    caractérisé en ce que
    le dégagement de chaleur est commandé par une réalisation ciblée de la couche de matière plastique (206).
  9. Procédé selon les revendications précédentes,
    caractérisé en ce que la couche de matière plastique (206) utilisée, est formée de polyéthylène, de polystyrène ou de polyester.
  10. Procédé selon les revendications précédentes,
    caractérisé en ce que
    la couche de matière plastique brûlée (206) est réalisée sous la forme d'un revêtement, d'un film, d'un tissu ou d'une enduction.
  11. Procédé selon les revendications précédentes,
    caractérisé en ce que
    la couche de matière plastique (206), brûlée a une épaisseur de moins de 1 µm jusqu'à 5 mm et notamment de l'ordre de 1 à 3 mm.
EP20040020965 2003-10-30 2004-09-03 Procédé de fabrication d'une pièce moulée composite et pièce moulée composite Expired - Fee Related EP1527833B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10350713 2003-10-30
DE2003150713 DE10350713A1 (de) 2003-10-30 2003-10-30 Verfahren zur Herstellung eines Verbundgussteils sowie Verbundgussteil

Publications (2)

Publication Number Publication Date
EP1527833A1 EP1527833A1 (fr) 2005-05-04
EP1527833B1 true EP1527833B1 (fr) 2010-02-24

Family

ID=34399614

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040020965 Expired - Fee Related EP1527833B1 (fr) 2003-10-30 2004-09-03 Procédé de fabrication d'une pièce moulée composite et pièce moulée composite

Country Status (3)

Country Link
EP (1) EP1527833B1 (fr)
DE (2) DE10350713A1 (fr)
ES (1) ES2338786T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005047435A1 (de) * 2005-09-30 2007-04-05 Ks Aluminium-Technologie Ag Verfahren zur Herstellung eines Zylinderkurbelgehäuses aus übereutektischer Aluminium-Silizium-Legierung im Rheocast/Thixocast-Verfahren

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE400746C (de) * 1923-06-03 1924-08-19 Willibald Raym Dipl Ing Verfahren zum Eingiessen von Wellen
US2975084A (en) * 1953-03-23 1961-03-14 Chrysler Corp Flux composition for aluminum casting process and methods for controlling molten flux baths
US5179994A (en) * 1992-01-16 1993-01-19 Cmi International, Inc. Method of eliminating porosity defects within aluminum cylinder blocks having cast-in-place metallurgically bonded cylinder liners
DE4434576A1 (de) 1994-08-09 1996-02-15 Ks Aluminium Technologie Ag Verbundgußzylinder oder -zylinderblock
DE19504949C1 (de) * 1995-02-15 1996-08-22 Ifu Engineering Und Consulting Verfahren zur Herstellung eines Verbundgußteiles in einer Gießform
DE19745725A1 (de) 1997-06-24 1999-01-07 Ks Aluminium Technologie Ag Verfahren zum Herstellen eines Verbundgussteils
DE19859098C1 (de) * 1998-12-21 2000-03-02 Wolfgang Eberlein Zylinderlaufbuchse aus Grauguß zum Eingießen in einen aus Leichtmetallguß bestehenden Motorblock eines Verbrennungsmotors
DE10017391A1 (de) * 2000-04-07 2001-10-11 Volkswagen Ag Verfahren zur Herstellung von metallischen Dauerformen und Dauerform
DE10153306B4 (de) * 2001-10-31 2010-07-15 Daimler Ag Verfahren zum Eingießen eines Einlegeteils

Also Published As

Publication number Publication date
DE10350713A1 (de) 2005-06-02
ES2338786T3 (es) 2010-05-12
DE502004010802D1 (de) 2010-04-08
EP1527833A1 (fr) 2005-05-04

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