EP1390168B1 - Mould and method of forming a lost foam model for a light metall cylinder sleeve - Google Patents

Mould and method of forming a lost foam model for a light metall cylinder sleeve Download PDF

Info

Publication number
EP1390168B1
EP1390168B1 EP02745072A EP02745072A EP1390168B1 EP 1390168 B1 EP1390168 B1 EP 1390168B1 EP 02745072 A EP02745072 A EP 02745072A EP 02745072 A EP02745072 A EP 02745072A EP 1390168 B1 EP1390168 B1 EP 1390168B1
Authority
EP
European Patent Office
Prior art keywords
mould
grooves
producing
foam casting
casting model
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
EP02745072A
Other languages
German (de)
French (fr)
Other versions
EP1390168A1 (en
Inventor
Karlheinz Bing
Frank Winger
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.)
Mahle GmbH
Original Assignee
Mahle GmbH
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 Mahle GmbH filed Critical Mahle GmbH
Publication of EP1390168A1 publication Critical patent/EP1390168A1/en
Application granted granted Critical
Publication of EP1390168B1 publication Critical patent/EP1390168B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/02—Lost patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/02—Lost patterns
    • B22C7/023—Patterns made from expanded plastic materials
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F2200/00—Manufacturing
    • F02F2200/06—Casting
    • F02F2200/08—Casting using a lost model, e.g. foam casting

Abstract

According to the invention a light metal cylinder liner with a surface which facilitates the connection with the surrounding cast material may be produced, whereby the cylinder liner is produced by means of a lost-foam method with a form for production of the cast foam model having a structured surface with height variations of 0.8 to 5 mm, said structuring being for example grooves or longitudinal elevations.

Description

Die Erfindung betrifft eine Form und ein Verfahren zur Herstellung eines verlorenen Schaumstoffgussmodells für eine Leichtmetall-Laufbuchse von Verbrennungsmotoren.The invention relates to a mold and a method for producing a lost foam casting model for a light metal liner of internal combustion engines.

Es ist bekannt, Leichtmetall-Laufbuchsen mit erhöhtem Siliziumgehalt in Motorblöcke im Verbundgussverfahren einzugießen. Dabei ist es erforderlich, zwischen dem Grundmaterial mit niedrigem Si-Gehalt und der Laufbuchse mit höherem Si-Gehalt eine gute form- oder stoffschlüssige Verbindung herzustellen. Voraussetzung für eine derartige Verklammerung von Laufbuchsen und Grundmaterial ist unter anderem eine raue, zerklüftete Oberfläche der einzugießenden Laufbuchse.It is known to pour light alloy liners with increased silicon content in engine blocks in the composite casting process. It is necessary to produce a good positive or cohesive connection between the base material with a low Si content and the liner with a higher Si content. Prerequisite for such a clamping of liners and base material is, inter alia, a rough, rugged surface of the einzugießenden liner.

Um diese raue und zerklüftete Obe -rfläche herzustellen, wurden schon verschiedene Verfahren vorgeschlagen: Strahlen, Fräsen von Vertiefungen oder Umformen der Oberfläche der Laufbuchse durch Drückwalzen. Alle Verfahren erfordern im Anschluss an die gießtechnische Herstellung der Laufbuchse einen weiteren Bearbeitungsschritt.To produce this rough and fissured surface, various methods have been proposed: blasting, milling recesses, or reshaping the surface of the bushing by spin forming. All processes require a further processing step following the casting production of the liner.

Aus der Europäischen Patentschrift EP 0 532 331 B1 ist es bekannt, in die Außenfläche einer aus Eisen bestehenden Zylinderbuchse im Rahmen deren Herstellung durch Walzen oder Gießen oder im Anschluss an deren Herstellung ein Muster aus spiralförmig verlaufenden und sich kreuzenden Nuten einzuarbeiten. Nachteilig ist hierbei, dass es einen relativ großen Aufwand erfordert, das Muster in die Außenfläche der aus Eisen bestehenden Zylinderbuchse einzuarbeiten.It is known from European Patent EP 0 532 331 B1 to incorporate in the outer surface of a cylindrical bush made of iron during the production thereof by rolling or casting or, following its production, a pattern of spirally extending and intersecting grooves. The disadvantage here is that it requires a relatively large effort to incorporate the pattern in the outer surface of the cylinder liner made of iron.

Es ist ferner aus der DE 39 09 621 bekannt, Zylinderlaufbuchsen im Lost-Foam-Verfahren herzustellen. Dabei wird das Schaurnstoffgussrnodell in einer mehrteiligen Form hergestellt.It is also known from DE 39 09 621 to produce cylinder liners in the lost foam process. Here, the Schaurnstoffgussrnodell is produced in a multi-part mold.

Aus der nicht vorveröffentlichten DE 199 58 185 ist es bekannt, eine verlorene Form, präziser ein Schaumstoffgußmodell, mit strukturierter Außenoberfläche herzustellen, indem auf die glatte Oberfläche einer verlorenen Form adhäsiv Partikel aufgebracht werden, die beim Gießen der Leichtmetall-Laufbuchse Hinterschneidungen erzeugen.From the non-prepublished DE 199 58 185 it is known to produce a lost mold, more precisely a foam casting model, with a textured outer surface by adhesively depositing onto the smooth surface of a lost mold particles that create undercuts when casting the light metal liner.

Die Erfindung beschäftigt sich mit dem Problem, eine Leichtmetall-Laufbuchse mit strukturierter Oberfläche auf einfache Weise herzustellen. Dieses Problem wird gelöst, indem die Form zur Herstellung des verlorenen Schaumstoffgußmodells einer Zylinderlaufbuchse zumindest an Teilflächen eine strukturierte Oberfläche mit Höhenunterschieden von 0,8 bis 5 mm aufweist. Vorteilhafte Weiterbildungen sind Gegenstand der Unteransprüche.The invention addresses the problem of producing a light-metal liner with a structured surface in a simple manner. This problem is solved in that the mold for producing the lost foam casting model of a cylinder liner, at least at partial surfaces, has a structured surface with height differences of 0.8 to 5 mm. Advantageous developments are the subject of the dependent claims.

Bei der Herstellung des verlorenen Schaumstoffgußmodells in der erfindungsgemäßen Form entsteht eine strukturierte Außenoberfläche am Modell. Später wird das Modell in Gießsand eingebettet und über einen Angußkanal mit Schmelze in Verbindung gebracht. Dabei wird das Modell durch die Schmelze ersetzt. Die Oberflächenstruktur des Modells wird am Gußstück abgebildet, es entsteht eine Zylinderlaufbuchse mit strukturierter Oberfläche, ohne daß irgendeine Zusatzbearbeitung notwendig wäre.In the production of the lost foam casting model in the mold according to the invention, a structured outer surface is produced on the model. Later, the model is embedded in foundry sand and associated with melt via a runner. The model is replaced by the melt. The surface structure of the model is shown on the casting, it creates a cylinder liner with a textured surface, without any additional processing would be necessary.

Das Schaumstoffgußmodell besteht im Regelfall aus Polystyrol.The foam casting model is usually made of polystyrene.

Die die strukturierte Oberfläche bildenden Höhenunterschiede an der Oberfläche der Laufbuchse liegen bei 0,8 bis 5 mm, vorzugsweise bei 1 bis 3 mm und besonders bevorzugt bei 1 bis 2 mm.The height differences on the surface of the bushing forming the structured surface are 0.8 to 5 mm, preferably 1 to 3 mm and particularly preferably 1 to 2 mm.

Dabei können die Höhenunterschiede entweder durch Nuten oder durch Erhebungen gebildet sein und die Nuten oder Erhebungen können vorzugsweise in Axialrichtung, in Umfangsrichtung oder in Diagonalrichtung verlaufen. Ferner können Nuten oder Erhebungen sich auch wellenförmig erstrecken. Auch Kombinationen der beschriebenen Verläufe sind möglich.The height differences can be either by grooves or be formed by projections and the grooves or protrusions may preferably extend in the axial direction, in the circumferential direction or in the diagonal direction. Furthermore, grooves or elevations may also extend undulating. Also combinations of the described courses are possible.

Die Nuten können in die Form zur Herstellung des Schaumstoffgußmodells beispielsweise durch Fräsen eingebracht werden, die Erhebungen durch Auftragschweißen. Auch das Erodierverfahren kommt in Betracht.The grooves can be introduced into the mold for producing the Schaumstoffgußmodells for example by milling, the surveys by build-up welding. The erosion process is also considered.

Die Form zur Herstellung des Schaumstoffgußmodells muß so geteilt sein, daß die Ausformbarkeit des Schaumstoffgußmodells gewährleistet ist. Sie kann insbesondere in zwei Formhälften oder vier Formteile aufgeteilt sein.The mold for making the Schaumstoffgußmodells must be divided so that the formability of the Schaumstoffgußmodells is guaranteed. It may in particular be divided into two mold halves or four moldings.

Fig. 1 zeigt eine erfindungsgemäße Oberfläche einer Form zur Herstellung eines Schaumstoffgußmodells. Die Oberfläche zeigt diagonal verlaufende Nuten 1. Ebenso können jedoch anstatt der Nuten auch Erhebungen ausgebildet sein. Durch die Nuten 1 ist die Oberfläche in rautenförmige Einzelflächen 2 unterteilt.Fig. 1 shows a surface according to the invention of a mold for the production of a foam casting model. The surface shows diagonally extending grooves 1. Likewise, however, elevations may be formed instead of the grooves. By the grooves 1, the surface is divided into diamond-shaped individual surfaces 2.

Claims (6)

  1. Mould for producing a lost foam casting model for a light metal cylinder sleeve of internal-combustion engines, characterised in that the mould has a structured surface with height differences of 0.8 to 5 mm, at least on partial faces.
  2. Mould for producing a foam casting model according to claim 1, characterised in that the structured surface is formed by grooves (1) in the surface of the mould.
  3. Mould for producing a foam casting model according to claim 1, characterised in that the structured surface is formed by elevations in the surface of the mould.
  4. Mould for producing a foam casting model according to claim 1, characterised in that the grooves (1) or the elevations extend in the axial direction, in the peripheral direction, in the diagonal direction or in an undulating manner.
  5. Method for producing a foam casting model for a light metal cylinder sleeve of internal-combustion engines, characterised in that a surface structure with height differences of 0.8 to 5 mm, consisting of grooves (1) or of elevations, is formed on the surface of the mould for producing the foam casting model, the grooves being milled into the surface or the elevations being produced by build-up welding.
  6. Method according to claim 5, characterised in that the surface is structured by grooves (1) or elevations extending in the axial direction, in the peripheral direction, in the diagonal direction or in an undulating manner.
EP02745072A 2001-05-25 2002-05-21 Mould and method of forming a lost foam model for a light metall cylinder sleeve Expired - Fee Related EP1390168B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10125615A DE10125615A1 (en) 2001-05-25 2001-05-25 Mold and method for making a lost foam cast model for a light metal liner
DE10125615 2001-05-25
PCT/DE2002/001860 WO2002094474A1 (en) 2001-05-25 2002-05-21 Mould and method for the production of a lost-foam casting model for a light metal cylinder liner

Publications (2)

Publication Number Publication Date
EP1390168A1 EP1390168A1 (en) 2004-02-25
EP1390168B1 true EP1390168B1 (en) 2006-07-12

Family

ID=7686186

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02745072A Expired - Fee Related EP1390168B1 (en) 2001-05-25 2002-05-21 Mould and method of forming a lost foam model for a light metall cylinder sleeve

Country Status (7)

Country Link
US (2) US20040173334A1 (en)
EP (1) EP1390168B1 (en)
JP (1) JP2004526576A (en)
KR (1) KR100886513B1 (en)
BR (1) BR0209991B1 (en)
DE (2) DE10125615A1 (en)
WO (1) WO2002094474A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10125615A1 (en) * 2001-05-25 2002-12-05 Mahle Gmbh Mold and method for making a lost foam cast model for a light metal liner
KR100930838B1 (en) * 2007-12-05 2009-12-10 (주)아이콘 Suction pad molding method of semiconductor package transfer device and suction pad of semiconductor package transfer device manufactured thereby
JP2009184280A (en) * 2008-02-08 2009-08-20 Komori Corp Cylinder of folder
US8136571B2 (en) * 2009-05-19 2012-03-20 Debruin Mark Carbidic outer edge ductile iron product, and as cast surface alloying process
US20110073061A1 (en) * 2009-09-28 2011-03-31 Jeungsuck Chae Pistons with a rough surface
US20160222907A1 (en) * 2015-01-29 2016-08-04 Mahle Inc. Cross Hatch Liner Grooves
JP6256524B2 (en) * 2016-05-17 2018-01-10 スズキ株式会社 Cast-in member and manufacturing method thereof
US10247129B2 (en) 2017-02-22 2019-04-02 GM Global Technology Operations LLC Cylinder liner for internal combustion engine
US10253721B2 (en) 2017-04-12 2019-04-09 GM Global Technology Operations LLC Cylinder liner for internal combustion engine
JP6979171B2 (en) * 2017-11-16 2021-12-08 スズキ株式会社 Casting and packaging members and their manufacturing methods

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60118352A (en) 1983-11-30 1985-06-25 Morikawa Sangyo Kk Production of cylinder liner for embedment by casting and pattern for casting cylinder liner
US4657063A (en) * 1985-05-17 1987-04-14 Outboard Marin Corporation Foam pattern for casting an air cooled cylinder head
DE3619170A1 (en) * 1986-06-06 1987-12-10 Basf Ag Use of polystyrene foam as lost pattern in the production of metal castings
JPS63248543A (en) 1987-04-03 1988-10-14 Honda Motor Co Ltd Cylinder liner and its production
FR2626403B1 (en) * 1988-01-27 1990-05-11 Framatome Sa PROTECTION SYSTEM FOR A NUCLEAR REACTOR IN THE EVENT OF A FALL OF AN ANTIREACTIVE ELEMENT
US4986942A (en) * 1988-03-22 1991-01-22 Outboard Marine Corporation Method for forming ported cylinder sleeve liner foam pattern
DE3824574C2 (en) * 1988-07-19 1997-07-17 Michael Haeusle Method of casting precision castings
US5027878A (en) * 1989-10-05 1991-07-02 Deere & Company Method of impregnation of iron with a wear resistant material
MX9204697A (en) * 1991-09-12 1993-03-01 Ford Motor Co IN SITU CAST IRON BASED COATINGS FOR CYLINDERS.
US5746272A (en) * 1996-09-30 1998-05-05 Johnson & Johnson Professional, Inc. Investment casting
JP2001055956A (en) 1999-08-17 2001-02-27 Asama Giken Co Ltd Cylinder block with liner
DE19958185A1 (en) 1999-12-02 2001-06-07 Mahle Ventiltrieb Gmbh Lost form for the production of a cylinder liner
DE10125615A1 (en) * 2001-05-25 2002-12-05 Mahle Gmbh Mold and method for making a lost foam cast model for a light metal liner

Also Published As

Publication number Publication date
US20040173334A1 (en) 2004-09-09
EP1390168A1 (en) 2004-02-25
US7172011B2 (en) 2007-02-06
BR0209991B1 (en) 2011-04-19
KR100886513B1 (en) 2009-03-02
DE10125615A1 (en) 2002-12-05
KR20030097900A (en) 2003-12-31
BR0209991A (en) 2004-04-06
WO2002094474A1 (en) 2002-11-28
DE50207505D1 (en) 2006-08-24
JP2004526576A (en) 2004-09-02
US20060254743A1 (en) 2006-11-16

Similar Documents

Publication Publication Date Title
EP1390168B1 (en) Mould and method of forming a lost foam model for a light metall cylinder sleeve
DE19605946C1 (en) Cylinder liner for internal combustion engines and their manufacturing process
CN1092586C (en) Bicycle hollow crank arm and its producing method
DE19845347C1 (en) Cylinder liner
DE102016123838B4 (en) Process for producing an aluminum cylinder block
DE19707906C2 (en) Process for the production of hollow metal molds
DE19826848C5 (en) Alloy wheel for motor vehicles
DE102014211350A1 (en) Casting method for producing a piston and pistons for internal combustion engines
DE102013015431A1 (en) Method for producing a cast metallic component and cast metallic component
DE10129046B4 (en) Piston for an internal combustion engine with a sprue
EP1226889A2 (en) Process for manufacturing a casting consisting of at least two different metallic materials
EP1216771A9 (en) Inserted core for producing a casting mould and process for the production of such casting mould
EP1924373B1 (en) Cylinder crankcase for motor vehicles
EP1235657A2 (en) Lost mould for producing a cylindrical bushing sleeve
DE4305196C2 (en) Process for producing an injection mold
JPS6333145A (en) Core molding method
KR100427310B1 (en) Die casting method
WO2009056244A1 (en) Method for producing a cylinder crankcase
DE19925541C1 (en) Molding tool used e.g. for light metal die casting consists of a first category of tool parts and second category of tool parts
DE10205958A1 (en) Production of light metal component used as cylinder crankcase comprises positioning porous ceramic preform in die casting tool, infiltrating preform with light metal, fixing in-gate part in mold and casting to form light metal component
DE10218714A1 (en) Process for producing a light metal liner with an outer rough surface
US20040163256A1 (en) Method for producing a light-alloy bearing bush with a rough external surface
DE102022112179A1 (en) Method for producing a cast component, component composite and casting mold
DE3931678A1 (en) Light alloy pressure die casting - incorporates cylinder walls produced by chilling casting
DE2500147A1 (en) Precision castings with large flat surfaces - using extra lost pattern behind shell mould to provide reinforcement

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20031121

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

17Q First examination report despatched

Effective date: 20041208

RTI1 Title (correction)

Free format text: MOULD AND METHOD OF FORMING A LOST FOAM MODEL FOR A LIGHT METALL CYLINDER SLEEVE

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20060712

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 50207505

Country of ref document: DE

Date of ref document: 20060824

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20060913

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20070413

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20180524

Year of fee payment: 17

Ref country code: FR

Payment date: 20180529

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20180530

Year of fee payment: 17

Ref country code: DE

Payment date: 20180731

Year of fee payment: 17

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50207505

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20190521

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191203

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190521

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190521

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190531