EP0307286B1 - Verfahren zum Giessen eines Zylinderblockes oder des entsprechenden Giessmodells - Google Patents

Verfahren zum Giessen eines Zylinderblockes oder des entsprechenden Giessmodells Download PDF

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Publication number
EP0307286B1
EP0307286B1 EP88402207A EP88402207A EP0307286B1 EP 0307286 B1 EP0307286 B1 EP 0307286B1 EP 88402207 A EP88402207 A EP 88402207A EP 88402207 A EP88402207 A EP 88402207A EP 0307286 B1 EP0307286 B1 EP 0307286B1
Authority
EP
European Patent Office
Prior art keywords
casting
plates
axis
cylinder block
parallel
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
EP88402207A
Other languages
English (en)
French (fr)
Other versions
EP0307286A1 (de
Inventor
Michel Gaulard
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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 Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0307286A1 publication Critical patent/EP0307286A1/de
Application granted granted Critical
Publication of EP0307286B1 publication Critical patent/EP0307286B1/de
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
    • B22C9/10—Cores; Manufacture or installation of cores
    • B22C9/103—Multipart cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/22—Moulds for peculiarly-shaped castings
    • B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
    • 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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/005—Cammed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/058—Undercut

Definitions

  • the present invention relates to a device for molding a crankcase or cylinder block of an internal combustion engine comprising several cylinders aligned with parallel axes and several bearings for mounting a rotating shaft, for example of the engine crankshaft, the axis is perpendicular to the axis of the cylinders and which is carried respectively by several parallel partitions which extend, in planes perpendicular to the axis of the shaft and which have recesses which prevent the demoulding of the cylinder block according to a direction parallel to the axis of the cylinders.
  • the molding device can also be used for the production of a corresponding foundry model, for example a foam model used in the lost foam molding technique, known under the name of LOST FOAM.
  • the various techniques of lost foam molding for obtaining cast iron or aluminum parts require carrying out specific tests and endurance tests given their differences in design and geometry. compared to parts obtained by a conventional sand molding process.
  • the object of the invention is to provide a molding device which makes it possible to obtain, in the case of lost foam molding or shell molding, parts identical to those obtained by the conventional sand molding process.
  • the molding device is characterized in that it comprises, for molding partitions, two series of parallel and alternating molding plates which extend in planes perpendicular to the axis of the shaft, each series of molding plates being respectively mounted on a support which can slide parallel to the axis of the shaft with respect to the cylinder block between a molding position in which the molding faces facing two consecutive plates are in abutment against one another, and a demolding position in which these faces molding are spaced from each other by relative sliding of the two supports in two opposite directions.
  • the molding device comprises a series of clamping elements mounted on a plate which can slide perpendicular to the axis of the shaft between its molding position in which each clamping element is received between said bearing faces, and its demolding position in which the clamping elements are retracted to allow the supports to slide.
  • each of the two supports is formed by a frame comprising two lateral uprights between which the molding plates are mounted spaced apart, the two frames being superimposed and sliding one on the other.
  • the purpose of the molding device according to the invention shown in the figures is to allow the production of a cylinder block 10, or that of a corresponding foundry model.
  • the cylinder block 10 comprises at its upper part several cylinders aligned with parallel axes 12.
  • the cylinder block 10 comprises four cylinders whose parallel axes are identified by the letters a, b, c and D.
  • the cylinder block 10 comprises several bearings 14 which allow the mounting of a rotating shaft, in this case the engine crankshaft, the axis XX of which is perpendicular to the axis of the cylinders 12.
  • the bearings 14 are formed in parallel partitions 16 which extend, between the cylinders, and at each end of the cylinder block, in planes perpendicular to the axis XX of the crankshaft.
  • the partitions 16, at the lower end of which the bearings 14 are formed, have lateral recesses 18 which extend inside the partitions in a direction parallel to the axis XX of the crankshaft and which, therefore, prevent the release of the cylinder block in a direction parallel to the axis of the cylinders 12.
  • These recesses 18 are necessary for the machining of the base of the cylinders 12, of the inner faces of the crankshaft bearings 14 and make it possible to clear passages for the counterweights of the crankshaft .
  • These recesses also allow a significant weight gain in the production of the cylinder block.
  • the device for molding the cylinder block 10 comprises, at its upper part, four parts of lateral molds 20, 22, 24 and 26 which make it possible to produce the external wall of the cylinder block 10.
  • the cylinders 12 are obtained using of four cylindrical mold elements 28 arranged at the top of the molding device.
  • the mold parts 20 to 28 which have just been mentioned are of a conventional design and will not be described here in more detail.
  • the molding device comprises two series of plates of parallel moldings 30 and 32.
  • each series of plates comprises four identical or slightly different plates.
  • the molding plates 30 and 32 are parallel and alternate with each other, and extend in planes perpendicular to the axis XX of the crankshaft.
  • Each of the plates 30 of the first series of plates has a molding face 30 ′ in which is hollowed out a profile corresponding to the raised part of the partition 16 which delimits the bearings 14 and the recesses 18 which it is desired to produce, and an opposite support face 30 ⁇ .
  • each of the plates 32 of the second series of plates has a molding face 32 ′, complementary to the molding face 30 ′ of the molding plate 30 disposed opposite, and an opposite face of 32 ⁇ support.
  • the molding faces 30 ′ of the plates of the first series are turned to the left, considering the figure, and are arranged opposite the molding faces 32 ′ of the plates 32 of the second series of plates which are turned to the right.
  • a molding face 30 ′ of a plate 30 cooperates with a corresponding cavity formed in the lateral mold part 20, while for the production of the rightmost partition 16 , a molding face 32 ′ of a plate 32 cooperates with a corresponding imprint formed in the lateral mold part 22.
  • the four molding plates 30 of the first series of plates are mounted on a sliding support 34.
  • the support 34 has the shape of a frame and comprises two lateral uprights 36 and 38 between which the four plates 30 are mounted in parallel and spaced apart.
  • the support 34 is slidably mounted in a horizontal frame plate 40 of the molding device so that it can slide, in parallel to the axis XX of the crankshaft, relative to the cylinder block 10.
  • the sliding support 34 is associated with a control cylinder 42 which makes it possible to move it between a closed molding position and an open demolding position.
  • the four plates 32 of the second series of plates are mounted in a sliding support 44.
  • the sliding support 44 is formed by a frame comprising two lateral uprights 46 and 48 between which are mounted the four plates 32 which are parallel to one another and spaced apart the same distance as that which separates the plates 30 from the first series of plates.
  • the support 44 is slidably mounted in a lower part 50 of the molding device which is fixed to the fixed frame part 40 and with respect to which it can slide in a direction parallel to the axis X-X of the crankshaft.
  • the sliding support 44 is also associated with a second control cylinder 43.
  • the two supports 34 and 44 are superimposed and slide one over the other via the surfaces facing the uprights 36, 38 and 46, 48 respectively.
  • the plates 32 of the second series of plates are inserted into the corresponding spaces separating two plates 30 of the first series of plates.
  • the molding device also comprises a series of clamping elements 52 which are mounted on a plate 54 which can slide, perpendicular to the axis XX of the crankshaft, that is to say parallel to the axis of the cylinders 12.
  • the sliding plate 54 is slidably mounted on four columns 56 of the fixed frame 40 and its displacement is effected by a third cylinder command 58.
  • the clamping elements 52 consist of parallel plates of dimensions substantially equal to that of the plates 30 and 32 but which have in axial section, and as can be seen in Figures 1, 4 and 6, a wedge-shaped profile.
  • the clamping corners 52 extend in planes parallel to each other and are spaced apart by a distance substantially equal to that separating the plates from each of the two series 30 and 32.
  • the molding device is shown in its closed position, that is to say its molding position in which one can perform the molding operation of the cylinder block or the corresponding foundry model.
  • the molding faces facing 30 ′ and 32 ′ of two consecutive plates 30 and 32 bear against one another in their lower part located between the bearings 14 and the supports 34, 44 .
  • the sliding plate 54 and the clamping corners 52 are in their molding position in which each clamping element 52 is received between the bearing faces facing 30 ⁇ and 32 ⁇ of two consecutive molding plates.
  • the sliding plate 54 Given the wedge-shaped profile of the clamping elements 52 and the slight inclination of the bearing faces of the plates 30 and 32, the sliding plate 54 provides a clamping effect on the molding plates 30 and 32 so as to ensure perfect sealing of the lower part of the molding device which they constitute for the production of the partitions 16.
  • the tightening is carried out by vertical displacement upwards of the plate 54 in the direction indicated by arrow A using the jack 58.
  • the demolding operation of the cylinder block, or of the foundry model, is carried out in several stages from the molding position shown in FIGS. 1 and 2.
  • the clamping plate 54 is lowered vertically downwards, and therefore the clamping elements 52 until the latter are retracted between the plates 30 and 32 as illustrated in FIGS. 4 and 5. In this position, the clamping elements 52 no longer act on the plates 30 and 32, but the molding faces opposite 30 ′, 32 ′ of the latter are always in abutment one against the other due to the force applied to them by the jacks 42 and 43.
  • the two sliding supports 34 and 44 are moved relative to one another, and relative to the cylinder block 10, using the two cylinders 42 and 43, until the molding device is in its open demolding position shown in FIG. 6.
  • the bearing faces facing each other -screw 30 ⁇ and 32 ⁇ of two consecutive plates 30, 32 are in contact with each other.
  • the spacing of the plates 30 and 32 is chosen so that, in the demolding position, the molding faces opposite 30 ′ and 32 ′ are sufficiently spaced apart on the other to allow demolding of the partitions of the cylinder block 10 in a direction parallel to the axis of the cylinders, that is to say here vertically upwards, without any part of the plates preventing this demolding operation.
  • the molding device is closed in the reverse order of the steps which have just been mentioned.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Claims (6)

1. Vorrichtung zum Gießen eines Zylinderblocks (10) oder eines entsprechenden Gießmodells mit mehreren auf parallelen Achsen (a, b, c, d) ausgerichteten Zylindern (12) und mehreren Lagern (14) für die Montage einer Drehwelle, deren Achse (X-X) senkrecht zur Achse der Zylinder verläuft, und die entsprechend durch mehrere parallele Trennwände (16) getragen wird, die sich in zur Achse (X-X) der Welle senkrechten Ebenen erstrecken, und die Ausnehmungen (18) aufweisen, die das Ausformen des Zylinderblocks entlang einer zur Achse der Zylinder parallelen Richtung verhindern, dadurch gekennzeichnet, daß sie für das Gießen der Trennwände zwei Reihen von parallelen und abwechselnden Gießplatten (30, 32) aufweist, die sich in senkrecht zur Achse der Welle verlaufenden Ebenen erstrecken, wobei jede Reihe von Gießplatten (30, 32) entsprechend auf einem Lager (34, 44) angeordnet ist, das parallel zur Achse der Welle bezüglich des Zylinderblockes zwischen einer Gießstellung, in der die Gießseiten (30′, 32′) gegenüber von zwei aufeinanderfolgenden Platten (30, 32) in Anlage aneinander sind, und einer Ausformungsstellung gleiten kann, in der die gegenüberliegenden Gießseiten (30′, 32′) voneinander beabstandet sind, durch relatives Gleiten der beiden Lager (34, 44) entlang zweier entgegengesetzter Richtungen.
2. Gießvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß jedes der beiden gleitenden Lager (34, 44) entsprechend mit einem Betätigungsstelltrieb (42, 43) verbunden ist.
3. Gießvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß ein jedes der beiden Lager (34, 44) von einem Rahmen gebildet ist, der zwei seitliche Stützen (36-38, 46-48) aufweist, zwischen denen die Gießplatten (30, 32) beabstandet angeordnet sind, und daß die beiden Rahmen übereinander angeordnet sind und der eine auf dem anderen gleitet.
4. Gießvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie eine Reihe von Klemmelementen (52) aufweist, die auf einer Plattform (54) angeordnet sind, die senkrecht zur Achse der Welle zwischen einer Gießstellung, in der jedes Klemmelement (52) zwischen zwei aufeinanderfolgenden Platten (30, 32) aufgenommen ist gegen ihre Andruckseite (30˝, 32˝), entgegengesetzt zu ihrer Gießseite und ihrer Ausformstellung gleiten kann, in der die Klemmelemente (52) eingezogen sind, um das Gleiten der Lager (34, 44) zu erlauben.
5. Gießvorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Klemmelemente (52) aus parallelen Platten in Keilform gebildet sind, die sich in zur Achse der Welle senkrechten Ebenen erstrecken.
6. Gießvorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die gleitende Plattform (54) einem Betätigungsstelltrieb zugeordnet ist.
EP88402207A 1987-09-10 1988-09-01 Verfahren zum Giessen eines Zylinderblockes oder des entsprechenden Giessmodells Expired - Lifetime EP0307286B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8712569 1987-09-10
FR8712569A FR2620359B1 (fr) 1987-09-10 1987-09-10 Dispositif de moulage d'un bloc-cylindre ou d'un modele de fonderie correspondant

Publications (2)

Publication Number Publication Date
EP0307286A1 EP0307286A1 (de) 1989-03-15
EP0307286B1 true EP0307286B1 (de) 1991-07-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP88402207A Expired - Lifetime EP0307286B1 (de) 1987-09-10 1988-09-01 Verfahren zum Giessen eines Zylinderblockes oder des entsprechenden Giessmodells

Country Status (4)

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US (1) US4880048A (de)
EP (1) EP0307286B1 (de)
DE (1) DE3863728D1 (de)
FR (1) FR2620359B1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0815647B2 (ja) * 1990-06-28 1996-02-21 宇部興産株式会社 エンジンブロツクの鋳造装置
US5112207A (en) * 1991-04-04 1992-05-12 Build-A-Mold Limited Self-releasing mold
JPH0671409A (ja) * 1992-08-28 1994-03-15 Ryobi Ltd 水冷シリンダブロック鋳造用金型
US6991755B2 (en) * 2003-04-17 2006-01-31 Northrop Grumman Corporation Syntactic tunnel core
EP2442320B1 (de) * 2010-10-15 2013-01-09 ABB Technology AG Form zum Herstellen von hohlzylinderähnlichen Formteilen
CN102039378A (zh) * 2011-01-10 2011-05-04 浙江大学 一种升降铸造模具的机械装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2824347A (en) * 1952-11-21 1958-02-25 Bohn Aluminium & Brass Corp Molding machine
US2965938A (en) * 1956-06-21 1960-12-27 Permanent Mold & Die Co Inc Apparatus for casting pistons and the like
DE1113726B (de) * 1958-03-26 1961-09-14 Siemens Ag Verfahren zum Herstellen von Hochspannungsisolatoren aus Giessharz
US3897816A (en) * 1970-09-07 1975-08-05 Toyoda Automatic Loom Works Foundry pattern assembly
JPS6036930B2 (ja) * 1978-04-10 1985-08-23 住友重機械工業株式会社 成形金型装置
FR2479044B1 (fr) * 1980-03-26 1985-08-23 Rozier Guy Fusibles pour pieces de fonderie de tres haute precision, procede de fabrication et applications metallurgiques
SU935209A1 (ru) * 1980-12-01 1982-06-15 Научно-Исследовательский Институт Специальных Способов Литья Кокиль
FR2509661A1 (fr) * 1981-07-17 1983-01-21 Ouest Cie Procede et dispositif de moulage de pieces composites en matiere plastique
US4533312A (en) * 1982-12-27 1985-08-06 Holdt J W Von Simplified collapsible mold core
US4576568A (en) * 1985-02-25 1986-03-18 E-W Mold & Tool Company, Inc. Injection mold with thin wall hole forming means
US4632169A (en) * 1985-05-01 1986-12-30 Outboard Marine Corporation Two cycle cylinder block foam pattern

Also Published As

Publication number Publication date
EP0307286A1 (de) 1989-03-15
FR2620359B1 (fr) 1991-05-31
FR2620359A1 (fr) 1989-03-17
DE3863728D1 (de) 1991-08-22
US4880048A (en) 1989-11-14

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