EP1527833A1 - Process for fabricating a composite casting and composite casting - Google Patents

Process for fabricating a composite casting and composite casting Download PDF

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Publication number
EP1527833A1
EP1527833A1 EP04020965A EP04020965A EP1527833A1 EP 1527833 A1 EP1527833 A1 EP 1527833A1 EP 04020965 A EP04020965 A EP 04020965A EP 04020965 A EP04020965 A EP 04020965A EP 1527833 A1 EP1527833 A1 EP 1527833A1
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Prior art keywords
plastic layer
casting
composite
composite casting
further step
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EP04020965A
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German (de)
French (fr)
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EP1527833B1 (en
Inventor
Eckard Pueschel
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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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
    • 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 made in a first step in a another step is associated with a casting material and a Composite casting comprising a product prepared in a first step Output part and at least one in a further step with this connected casting area.
  • the output part can in the next step with a cast material can be completely or partially poured or poured, as well only one (regional) sprue take place.
  • a cast material can be completely or partially poured or poured, as well only one (regional) sprue take place.
  • the casting materials it can metals with common impurities or alloys, in particular also light metals or light metal alloys, such as Aluminum or magnesium, act.
  • the production can be done with usual Casting processes such as die casting, chill casting, lost foam casting, sand casting, Continuous casting, thixocasting, Squezzecasting or centrifugal casting done.
  • Such composite castings are, for example, in internal combustion engine driven Motor vehicles used as a crankcase.
  • the starting part may be cylinder liners made of steel, such as Cast iron, which trade with light metal or a light metal alloy made of aluminum or magnesium.
  • cylinder liners made of steel, such as Cast iron, which trade with light metal or a light metal alloy made of aluminum or magnesium.
  • hypereutectic aluminum cylinder liners with a infused hypoeutectic aluminum alloy are examples of aluminum cylinder liners with a infused hypoeutectic aluminum alloy.
  • DE 44 34 576 A1 relates to a cast Composite cast cylinder or cylinder block of hypoeutectic aluminum-silicon alloy with over-molded liner made of hypereutectic Aluminum-silicon alloy and, for example, proposes the Bushings on the outside by means of grooves, grooves, ribs or waves roughen to the necessary fixed connection of the encircling too guarantee.
  • the invention is therefore based on the object, a particularly good Connection of cast material to an output part at the same time very to ensure little effort. For example, at a Internal combustion engine should be a delay of the cylinder or the crankcase effectively avoided, the structural properties of the cast materials should remain unique.
  • Claim 1 is a coating of the output part at least in Composite area covered with a plastic layer as well as with a A composite casting according to claim 9, which is one having a plastic layer having provided output part.
  • the plastic layer burns in a further step, especially 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 if the plastic layer forms an inert protective gas atmosphere, for example CO 2 , during combustion.
  • the plastic layer releases heat during the next step, whereby by a targeted formation of the plastic layer the Heat release is controllable.
  • the Heat release is controllable.
  • Composite casting viewed in which the output part with a Plastic layer, for example of polyethylene, polystyrene or polyester, is provided, wherein the plastic layer suitably coated, is formed film-, tissue- or coating-like and a thickness of a few microns up to 5 mm, in particular from about 1 to 3 mm.
  • a Plastic layer for example of polyethylene, polystyrene or polyester
  • the plastic layer suitably coated is formed film-, tissue- or coating-like and a thickness of a few microns up to 5 mm, in particular from about 1 to 3 mm.
  • Figure 1 is a die-casting mold 100 for a not shown in detail Crankcase of an internal combustion engine shown.
  • this To reduce the weight of the crankcase is called cast material in the present case a light metal alloy, for example an aluminum-silicon alloy or a magnesium alloy.
  • Cylinder liners 104 are made of a different material than the Casting exist.
  • the cylinder liners 104 are off Gray cast iron or from a hypereutectic aluminum-silicon alloy made, which embedded in the aluminum matrix, evenly comprises trained and distributed silicon primary crystals.
  • the cylinder liners 204 are - as shown in Figure 2 - as Pre-fabricated inserts and provided with a plastic layer 206.
  • the Plastic layer 206 consists in the present case of polyethylene, styrene or Polyester and is applied to the cylinder liners 204. in the Embodiment, the cylinder liners 204 are only radially provided on the outside with the plastic layer 206, but it is also as considered very useful if the insert is covered on all sides. In particular, then there is a good surface protection of the insert until shedding.
  • the plastic layer 206 is foil, tissue, plating or coated like a coating.
  • 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.
  • plastics may also be used non-toxic and / or not residue-free combustion takes place. It can release substances which in the composite area is a change of the alloy and / or the structure of the insert and / or the encircling cause. Finally, through targeted selection and / or enrichment of the Plastic heat release are particularly controlled.
  • Plastic-coated insert 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, to be used.
  • different casting methods such as die-casting, chill casting, lost-foam casting, Sand casting, continuous casting, thixocasting, squezzecasting or Centrifugal casting, to be used.
  • the composite casting produced by the process is characterized in particular by a particularly good connection between Umgussmaterial and insert from, while the production of a very much compared to other connection improvement measures requires little effort.

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

Abstract

A process for production of a composite cast part involves production of a first starting part (104) in a first step, bonding it to a casting material in a second step and coating the bonding region with a synthetic plastic layer between the two steps. An independent claim is included for the composite cast layer.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines Verbundgussteils, wobei ein in einem ersten Schritt hergestelltes Ausgangsteil in einem weiteren Schritt mit einem Gusswerkstoff verbunden wird und ein Verbundgussteil umfassend ein in einem ersten Schritt hergestelltes Ausgangsteil sowie wenigstens einen in einem weiteren Schritt mit diesem verbundenen Gussbereich.The invention relates to a method for producing a composite casting, wherein an initial part made in a first step in a another step is associated with a casting material and a Composite casting comprising a product prepared in a first step Output part and at least one in a further step with this connected casting area.

Das Ausgangsteil kann im weiteren Schritt mit einem Gusswerkstoff vollständig oder teilweise umgossen bzw. eingegossen werden, ebenso kann nur ein (bereichsweiser) Anguss erfolgen. Bei den Gussmaterialien kann es sich um Metalle mit üblichen Verunreinigungen oder um Legierungen, insbesondere auch um Leichtmetalle oder Leichtmetalllegierungen, wie Aluminium oder Magnesium, handeln. Die Herstellung kann mit üblichen Gießverfahren wie Druckguss, Kokillenguss, Lost-Foam-Guss, Sandguss, Strangguss, Thixocasting, Squezzecasting oder Schleuderguss erfolgen. The output part can in the next step with a cast material can be completely or partially poured or poured, as well only one (regional) sprue take place. With the casting materials it can metals with common impurities or alloys, in particular also light metals or light metal alloys, such as Aluminum or magnesium, act. The production can be done with usual Casting processes such as die casting, chill casting, lost foam casting, sand casting, Continuous casting, thixocasting, Squezzecasting or centrifugal casting done.

Derartige Verbundgussteile werden beispielsweise in brennkraftmaschinengetriebenen Kraftfahrzeugen als Kurbelgehäuse verwendet. Bei dem Ausgangsteil kann es sich dabei um Zylinderlaufbuchsen aus Stahl, wie Grauguss, handeln, welche mit Leichtmetall oder einer Leichtmetalllegierung aus Aluminium oder Magnesium umgossen werden. Ebenso werden beispielsweise übereutektische Aluminiumzylinderlaufbuchsen mit einer untereutektischen Aluminiumlegierung umgossen.Such composite castings are, for example, in internal combustion engine driven Motor vehicles used as a crankcase. In which The starting part may be cylinder liners made of steel, such as Cast iron, which trade with light metal or a light metal alloy made of aluminum or magnesium. Likewise For example, hypereutectic aluminum cylinder liners with a infused hypoeutectic aluminum alloy.

Als besonders kritisch hat sich die Anbindung im Kontaktbereich zwischen Ausgangsteil und dem mit diesem verbundenen Gussmaterial erwiesen, so dass diesbezüglich eine Reihe von Lösungsvorschlägen bekannt geworden sind.Particularly critical is the connection in the contact area between Starting part and associated with this casting material, so that a number of solutions have become known in this regard are.

Die DE 44 34 576 A1 bezieht sich auf einen gegossenen Verbundgusszylinder oder -zylinderblock aus untereutektischer Aluminium-Silizium-Legierung mit umgossener Laufbuchse aus übereutektischer Aluminium-Silizium-Legierung und schlägt beispielsweise vor, die Laufbuchsen außenseitig mittels Rillen, Riefen, Rippen oder Wellen aufzurauen, um die notwendige feste Anbindung des Umgusses zu gewährleisten.DE 44 34 576 A1 relates to a cast Composite cast cylinder or cylinder block of hypoeutectic aluminum-silicon alloy with over-molded liner made of hypereutectic Aluminum-silicon alloy and, for example, proposes the Bushings on the outside by means of grooves, grooves, ribs or waves roughen to the necessary fixed connection of the encircling too guarantee.

Neben derartigen - häufig nicht ausreichenden - mechanischen Maßnahmen sind Verfahren bekannt geworden, welche zur Verbesserung der metallurgischen Bindung zwischen Ausgangsteil und Umguss eine metallische Beschichtung des Ausgangsteils vorsehen.In addition to such - often insufficient - mechanical Measures have become known methods for improving the metallurgical bond between the output part and the encapsulation one Provide metallic coating of the output part.

In diesem Zusammenhang wird auf die DE 197 45 725 A1 verwiesen, welche ein Verfahren zur Herstellung eines Verbundgussteils aus einer Leichtmetallegierung mit einem eingegossenen Eingusskörper betrifft und das Aufbringen einer Nickel- oder Molybdänlegierung auf den Eingusskörper mittels Lichtbogen- oder Plasmaspritzen beschreibt. In this context, reference is made to DE 197 45 725 A1, which a method for producing a composite casting from a Lightweight alloy with a cast-in body concerns and the application of a nickel or molybdenum alloy to the sprue describes by means of arc or plasma spraying.

Die Anbindung des Umgusses an das Ausgangsteil ist bei den bekannten Verfahren und Verbundgussteilen entweder nicht ausreichend oder nur mit einem sehr großen Aufwand hinsichtlich Herstellung und Kosten zu erreichen.The connection of the Umgusses to the output part is in the known Procedures and composite castings either insufficient or only with a very large effort in terms of production and costs too to reach.

Der Erfindung liegt daher die Aufgabe zugrunde, eine besonders gute Anbindung von Gussmaterial an ein Ausgangsteil bei gleichzeitig sehr geringem Aufwand zu gewährleisten. Beispielsweise bei einer Brennkraftmaschine soll ein Verzug der Zylinder oder des Kurbelgehäuses wirksam vermieden werden, die Struktureigenschaften der Gussmaterialien sollen eindeutig bleiben.The invention is therefore based on the object, a particularly good Connection of cast material to an output part at the same time very to ensure little effort. For example, at a Internal combustion engine should be a delay of the cylinder or the crankcase effectively avoided, the structural properties of the cast materials should remain unique.

Die Lösung der Aufgabe erfolgt mit einem Verfahren mit den Merkmalen des Anspruchs 1, welches eine Beschichtung des Ausgangsteils zumindest im Verbundbereich mit einer Kunststoffschicht umfasst sowie mit einem Verbundgussteil gemäß Anspruch 9, welches ein mit einer Kunststoffschicht versehenes Ausgangsteil aufweist.The object is achieved by a method with the features of Claim 1, which is a coating of the output part at least in Composite area covered with a plastic layer as well as with a A composite casting according to claim 9, which is one having a plastic layer having provided output part.

Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous embodiments and further developments of the invention are Subject of the dependent claims.

Gemäß einer besonders bevorzugten Weiterbildung des erfindungsgemäßen Verfahrens verbrennt die Kunststoffschicht im weiteren Schritt, zweckmäßgerweise rückstandsfrei, wobei bei der Verbrennung nur ungiftige Stoffe, wie CO2 und/oder H2O gebildet werden. Von besonderem Vorteil ist es, wenn die Kunststoffschicht bei der Verbrennung eine inerte Schutzgasatmosphäre, beispielsweise CO2, bildet.According to a particularly preferred embodiment of the method according to the invention, the plastic layer burns in a further step, zweckmäßgerweise residue-free, with the combustion only non-toxic substances, such as CO 2 and / or H 2 O are formed. It is particularly advantageous if the plastic layer forms an inert protective gas atmosphere, for example CO 2 , during combustion.

Einem ebenfalls besonders bevorzugten Weiterbildung des Verfahrens zufolge setzt die Kunststoffschicht während dem weiteren Schritt Wärme frei, wobei durch eine gezielte Ausbildung der Kunststoffschicht die Wärmefreisetzung steuerbar ist. Beispielsweise bedingt eine dickere Kunststoffschicht ebenso wie eine Beschichtung mit einem Kunststoff, welcher einen hohe Energie, wie Bindungsenergie, gespeichert hat, eine höhere Wärmefreisetzung.A likewise particularly preferred development of the method According to the plastic layer releases heat during the next step, whereby by a targeted formation of the plastic layer the Heat release is controllable. For example, requires a thicker Plastic layer as well as a coating with a plastic, which has stored a high energy, such as binding energy, one higher heat release.

Als besonders vorteilhaft wird eine Ausgestaltung des erfindungsgemäßen Verbundgussteil angesehen, bei welcher das Ausgangsteil mit einer Kunststoffschicht, beispielsweise aus Polyethylen, Polystyrol oder Polyester, versehen ist, wobei die Kunststoffschicht zweckmäßigerweise überzug-, folien-, gewebe- oder beschichtungsartig ausgebildet ist und eine Dicke von wenigen µm bis zu 5 mm, insbesondere von ca. 1 bis 3 mm, aufweist.Particularly advantageous is an embodiment of the invention Composite casting viewed in which the output part with a Plastic layer, for example of polyethylene, polystyrene or polyester, is provided, wherein the plastic layer suitably coated, is formed film-, tissue- or coating-like and a thickness of a few microns up to 5 mm, in particular from about 1 to 3 mm.

Nachfolgend ist ein besonders zu bevorzugendes Ausführungsbeispiel des erfindungsgemäßen Verfahrens unter Bezugnahme auf Figuren näher erläutert, dabei zeigen schematisch und beispielhaft

Figur 1
eine Druckgussform für ein Kurbelgehäuse einer Brennkraftmaschine mit kunststoffbeschichteten Zylinderlaufbuchsen sowie
Figur 2
eine kunststoffbeschichtete Zylinderlaufbuchse.
Hereinafter, a particularly preferred embodiment of the method according to the invention is explained in more detail with reference to figures, show schematically and by way of example
FIG. 1
a die-casting mold for a crankcase of an internal combustion engine with plastic-coated cylinder liners and
FIG. 2
a plastic-coated cylinder liner.

In Figur 1 ist eine Druckgussform 100 für ein nicht näher gezeigtes Kurbelgehäuse einer Brennkraftmaschine dargestellt. Insbesondere um das Gewicht des Kurbelgehäuses zu reduzieren, wird als Gussmaterial vorliegend eine Leichtmetalllegierung, beispielsweise eine Aluminium-Silizium-Legierung oder eine Magnesiumlegierung, verwendet. Eine besondere Beanspruchung erfahren im Betrieb der Brennkraftmaschine die Zylinderlaufbuchsen 104, so dass diese aus einem anderen Material als der Umguss bestehen. Beispielsweise sind die Zylinderlaufbuchsen 104 aus Grauguss oder aus einer übereutektischen Aluminium-Silizium-Legierung hergestellt, welche in die Aluminium-Matrix eingebettete, gleichmäßig ausgebildete und verteilte Silizium-Primärkristalle umfasst.In Figure 1 is a die-casting mold 100 for a not shown in detail Crankcase of an internal combustion engine shown. In particular, this To reduce the weight of the crankcase is called cast material in the present case a light metal alloy, for example an aluminum-silicon alloy or a magnesium alloy. A experience special stress in the operation of the internal combustion engine Cylinder liners 104, so these are made of a different material than the Casting exist. For example, the cylinder liners 104 are off Gray cast iron or from a hypereutectic aluminum-silicon alloy made, which embedded in the aluminum matrix, evenly comprises trained and distributed silicon primary crystals.

Die Zylinderlaufbuchsen 204 sind - wie in Figur 2 dargestellt - als Einlegeteile vorgefertigt und mit einer Kunststoffschicht 206 versehen. Die Kunststoffschicht 206 besteht vorliegend aus Polyethylen, Styrol oder Polyester und ist auf die Zylinderlaufbuchsen 204 aufgebracht. Im Ausführungsbeispiels sind die Zylinderlaufbuchsen 204 nur radial außenseitig mit der Kunststoffschicht 206 versehen, jedoch wird es auch als sehr zweckmäßig angesehen, wenn das Einlegeteil allseitig ummantelt ist. Insbesondere besteht dann ein guter Oberflächenschutz des Einlegeteiles bis zu Vergießen. Die Kunststoffschicht 206 ist folien-, gewebe-, überzugoder beschichtungsartig ausgebildet.The cylinder liners 204 are - as shown in Figure 2 - as Pre-fabricated inserts and provided with a plastic layer 206. The Plastic layer 206 consists in the present case of polyethylene, styrene or Polyester and is applied to the cylinder liners 204. in the Embodiment, the cylinder liners 204 are only radially provided on the outside with the plastic layer 206, but it is also as considered very useful if the insert is covered on all sides. In particular, then there is a good surface protection of the insert until shedding. The plastic layer 206 is foil, tissue, plating or coated like a coating.

Im Gießprozess wird der Formraum 102 der Druckgussform 100 unter hohem Druck mit der metallische Schmelze des Umgusses gefüllt, dabei verbrennt bedingt durch die hohe Temperatur der Schmelze die Kunststoffschicht 206 vorliegend ungiftig und rückstandsfrei unter Freisetzung von CO2 und H2O. Das CO2 bildet eine schutzgasartige Atmosphäre, welche während des Gießprozesses eine Oxidhautbildung des Vergussmetalls verhindert. Ferner wird bei der Verbrennung der Kunststoffschicht 206 Wärme freigesetzt und so das Erkalten der Schmelze-Front verzögert, es werden Kaltlaufstellen verhindert.In the casting process, 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.

Wenn gemäß einem anderen Ausführungsbeispiel andere Kunststoffe verwendet werden, kann gegebenenfalls auch eine nicht ungiftige und/oder nicht rückstandsfreie Verbrennung erfolgen. Es können Stoffe freigesetzt werden, welche im Verbundbereich eine Veränderung der Legierung und/oder des Gefüges des Einlegeteils und/oder des Umgusses bewirken. Schließlich kann durch gezielte Auswahl und/oder Anreicherung des Kunststoffes die Wärmefreisetzung besonders gesteuert werden. Die Kunststoffschicht 206 kann das Einlegeteil, wie Zylinderlaufbuchsen 204, gegebenenfalls nur bereichsweise umhüllen und/oder eine unterschiedliche Dicke, eine unterschiedliche Zusammensetzung und/oder unterschiedliche Eigenschaften aufweisen.If, according to another embodiment, other plastics may also be used non-toxic and / or not residue-free combustion takes place. It can release substances which in the composite area is a change of the alloy and / or the structure of the insert and / or the encircling cause. Finally, through targeted selection and / or enrichment of the Plastic heat release are particularly controlled. The Plastic layer 206, the insert, such as cylinder liners 204, if appropriate, envelop only in certain regions and / or a different one Thickness, a different composition and / or different Have properties.

Erfindungsgemäße kunststoffbeschichtete Einlegeteil können in Verbindung mit unterschiedlichen Gießverfahren, wie Druckguss, Kokillenguss, Lost-Foam-Guss, Sandguss, Strangguss, Thixocasting, Squezzecasting oder Schleuderguss, verwendet werden.Plastic-coated insert 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, to be used.

Das nach dem Verfahren hergestellte Verbundgussteil zeichnet sich insbesondere durch eine besonders gute Verbindung zwischen Umgussmaterial und Einleger aus, wobei gleichzeitig die Herstellung einen im Vergleich zu anderen verbindungsverbessernden Maßnahmen sehr geringem Aufwand erfordert.The composite casting produced by the process is characterized in particular by a particularly good connection between Umgussmaterial and insert from, while the production of a very much compared to other connection improvement measures requires little effort.

Claims (12)

Verfahren zur Herstellung eines Verbundgussteils, wobei ein in einem ersten Schritt hergestelltes Ausgangsteil in einem weiteren Schritt mit einem Gusswerkstoff verbunden wird, dadurch gekennzeichnet, dass nach dem ersten und vor dem weiteren Schritt das Ausgangsteil (104, 204) zumindest im Verbundbereich mit einer Kunststoffschicht (206) versehen wird.Method for producing a composite casting, wherein a starting part produced in a first step is connected in a further step with a casting material, characterized in that after the first and before the further step, the starting part (104, 204) at least in the composite region with a plastic layer ( 206) is provided. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Kunststoffschicht (206) im weiteren Schritt verbrennt.A method according to claim 1, characterized in that the plastic layer (206) burns in the further step. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Kunststoffschicht (206) während dem weiteren Schritt rückstandsfrei verbrennt.A method according to claim 1 or 2, characterized in that the plastic layer (206) burns without residue during the further step. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kunststoffschicht (206) bei der Verbrennung nur ungiftige Stoffe bildet. Method according to one of the preceding claims, characterized in that the plastic layer (206) forms only non-toxic substances during combustion. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kunststoffschicht (206) bei der Verbrennung eine Schutzgasatmosphäre bildet.Method according to one of the preceding claims, characterized in that the plastic layer (206) forms a protective gas atmosphere during combustion. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kunststoffschicht (206) rückstandsfrei zu CO2 und/oder H2O verbrennt.Method according to one of the preceding claims, characterized in that the plastic layer (206) burns residue-free to CO 2 and / or H 2 O. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kunststoffschicht (206) während dem weiteren Schritt Wärme freisetzt.Method according to one of the preceding claims, characterized in that the plastic layer (206) releases heat during the further step. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Wärmefreisetzung durch eine gezielte Ausbildung der Kunststoffschicht (206) gesteuert wird.Method according to one of the preceding claims, characterized in that the heat release is controlled by a targeted formation of the plastic layer (206). Verbundgussteil umfassend ein in einem ersten Schritt hergestelltes Ausgangsteil sowie wenigstens einen in einem weiteren Schritt mit diesem verbundenen Gussbereich, dadurch gekennzeichnet, dass das Ausgangsteil (204) mit einer Kunststoffschicht (206) versehen ist.Composite casting comprising an initial part made in a first step and at least one casting region connected thereto in a further step, characterized in that the output part (204) is provided with a plastic layer (206). Verbundgussteil nach Anspruch 9, dadurch gekennzeichnet, dass die Kunststoffschicht (206) aus Polyethylen, Polystyrol oder Polyester gebildet ist.Composite casting according to claim 9, characterized in that the plastic layer (206) made of polyethylene, polystyrene or polyester is formed. Verbundgussteil nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass die Kunststoffschicht (206) überzug-, folien-, gewebe- oder beschichtungsartig ausgebildet ist. Composite casting according to claim 9 or 10, characterized in that the plastic layer (206) is coated, foil, fabric or coating-like. Verbundgussteil nach einem der Ansprüche 9 bis 11, dadurch gekennzeichnet, dass die Kunststoffschicht (206) eine Dicke von wenigen µm bis zu 5 mm, insbesondere von ca. 1 bis 3 mm, aufweist.Composite casting according to one of claims 9 to 11, characterized in that the plastic layer (206) has a thickness of a few microns up to 5 mm, in particular from about 1 to 3 mm.
EP20040020965 2003-10-30 2004-09-03 Process for fabricating a composite casting and composite casting Expired - Lifetime EP1527833B1 (en)

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DE10350713 2003-10-30
DE2003150713 DE10350713A1 (en) 2003-10-30 2003-10-30 Method for producing a composite casting and composite casting

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EP1527833A1 true EP1527833A1 (en) 2005-05-04
EP1527833B1 EP1527833B1 (en) 2010-02-24

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EP1527833B1 (en) 2010-02-24

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