EP0307287A1 - Form und Verfahren zur Herstellung eines Giessereimodells - Google Patents

Form und Verfahren zur Herstellung eines Giessereimodells Download PDF

Info

Publication number
EP0307287A1
EP0307287A1 EP88402208A EP88402208A EP0307287A1 EP 0307287 A1 EP0307287 A1 EP 0307287A1 EP 88402208 A EP88402208 A EP 88402208A EP 88402208 A EP88402208 A EP 88402208A EP 0307287 A1 EP0307287 A1 EP 0307287A1
Authority
EP
European Patent Office
Prior art keywords
mold
model
molding
section
cylinders
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.)
Granted
Application number
EP88402208A
Other languages
English (en)
French (fr)
Other versions
EP0307287B1 (de
Inventor
Denis Jouguelet
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 EP0307287A1 publication Critical patent/EP0307287A1/de
Application granted granted Critical
Publication of EP0307287B1 publication Critical patent/EP0307287B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22C7/023—Patterns made from expanded plastic materials

Definitions

  • the subject of the present invention is a mold for molding a foundry model for an engine cylinder block comprising several cyclinders aligned with parallel axes, several bearings for mounting a crankshaft whose axis is perpendicular to the axis of the cylinders, of the cavities formed around the cylinders and of the recesses between the bearings and the cylinders.
  • the invention more particularly aims to allow the production of an expanded polystyrene model, used in the molding technique from lost foam models, known under the name of LOST FOAM or lost foam molding process.
  • Lost models of internal combustion engine cylinder blocks are currently obtained by assembling and gluing different parts of models produced separately.
  • the assembly of the various elements has the drawback of causing leaks and cracks, especially in the engine water chamber.
  • This technique also requires precision assembly of the different parts of the model, which can cause numerous faults in the connection area of the different parts.
  • the object of the invention is to propose a mold making it possible to produce a model of cylinder block in a single piece, in particular made of expanded polystyrene.
  • the invention provides a mold characterized in that it comprises three sections of molds superimposed along the direction of the axis of the cylinders, an upper section making it possible to carry out the prior molding of the upper part of the model comprising the cylinders and at least a portion of the cavities, a lower section making it possible to carry out the prior molding of the part bottom of the model comprising the bearings and at least a portion of the recesses, and a central section allowing the molding of the central part of the model comprising the complementary portions of said portions of the cavities and recesses, between said upper and lower parts.
  • the mold includes an upper removable mold element which cooperates with the upper section, during the prior molding operation of the upper part of the model, to delimit the portions of the cavities and close the opening. of the molding imprint of the upper section which opens to the lower face of the latter.
  • the lower and upper faces can be produced in the form of flat faces, perpendicular to the axis of the cylinders, with which cooperate two parallel and opposite plane faces of the central section of the mold.
  • the two preliminary molding steps can be carried out simultaneously.
  • the foundry model 10 made of expanded polystyrene and represented in FIG. 1 has the exact shape of a cylinder block of an internal combustion engine comprising several aligned cylinders 12, with parallel axes XX, and several bearings 14 for mounting a crankshaft, not shown, whose axis YY is perpendicular to the axis XX of the cylinders 12.
  • the cylinder block also includes cavities 16 formed around the cylinders 12 and the recesses 18 between the bearings 14 and the cylinders 12.
  • the mold according to the invention comprises three sections of mold 20, 22 and 24 superimposed along the direction of the axis X-X of the cylinders.
  • the upper section 20 makes it possible to pre-mold the upper part 20 ′ of the model in which the cylinders 12 are formed and at least a portion of the cavities 16.
  • the upper section 20 comprises lateral mold elements 26 and 28 as well as a fixed upper element 30 which delimits an imprint 32 in which the prior molding operation of the upper part 20 ′ of the model is carried out.
  • the imprint 32 opens at the lower face 34 of the upper section 20 through an opening 36.
  • the cavity 32 and the corresponding portions of the cavities 16 are also delimited, during the prior molding operation of the upper part 20 ′ of the model, by an upper removable mold element 38 which cooperates with the mold elements 26, 28 and 30 and which closes the opening 36.
  • the upper section 20, provided with the upper removable mold element 38 constitutes a self-contained mold allowing the upper part 20 ′ of the foundry model to be produced.
  • the lower mold section 24 is constituted by lateral mold elements 40 and 42 which cooperate with a fixed lower mold element 44 to allow the prior molding of the lower part 24 ′ of the model comprising the bearings. 14 and at least one portion of the recesses 18 inside a molding cavity 46 which opens to the upper face 48 of the lower section 24.
  • the lower section 24 is provided with a lower removable mold element 50 which cooperates, during the preliminary molding operation of the lower part 24 ′ of the model, with the mold elements 40, 42 and 44 to delimit the molding impression 46 and the portions of the recesses 18 and close the opening 52 of the impression 46.
  • the lower section 24 When equipped with the lower removable mold element 50, the lower section 24 constitutes an autonomous mold, shown in FIG. 5, in which the operation of prior molding of the lower part 24 ′ of the model can be carried out. foundry.
  • the central section 22 of the mold according to the invention also consists of lateral mold elements 54 and 56 which cooperate with removable mold elements 58 to delimit the molding imprint of the central part 22 'of the foundry model.
  • the central section 22 is bounded upwards and downwards by two parallel flat faces 60 and 62 respectively. These opposite flat faces 60 and 62 cooperate respectively with the lower face 34 of the upper section 20 and the upper face 48 of the lower section 24, the latter being flat faces perpendicular to the axis X-X of the cylinders.
  • the mold in three sections according to the invention allows the molding of a foundry model in one piece according to a process which will now be described.
  • the two preliminary molding operations of the upper 20 ′ and lower 24 ′ parts of the foundry model can be carried out simultaneously.
  • the upper 38 and lower 50 removable mold elements are dismantled.
  • the upper 20 and lower 24 mold sections then appear as they are illustrated in FIGS. 6 and 7.
  • the complete mold is then produced according to the invention by interposing the central section 22 between the lower face 34 of the upper section 20 and the upper face 48 of the lower section 24.
  • the three mold sections 20, 22 and 24 having been thus previously positioned and assembled, there is only more than performing the molding operation of the central part 22 ′ of the model so as to obtain a one-piece foundry model as shown in FIG. 8 which does not require any additional assembly operation.
  • Each of the sections 20, 22 and 24 of the mold is conventionally made up of several parts which can, for example, slide and fit together so that they can be dismantled after the final molding operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
EP88402208A 1987-09-11 1988-09-01 Form und Verfahren zur Herstellung eines Giessereimodells Expired - Lifetime EP0307287B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8712642 1987-09-11
FR8712642A FR2620357B1 (fr) 1987-09-11 1987-09-11 Moule pour le moulage d'un modele de fonderie et son procede de mise en oeuvre

Publications (2)

Publication Number Publication Date
EP0307287A1 true EP0307287A1 (de) 1989-03-15
EP0307287B1 EP0307287B1 (de) 1991-02-06

Family

ID=9354829

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88402208A Expired - Lifetime EP0307287B1 (de) 1987-09-11 1988-09-01 Form und Verfahren zur Herstellung eines Giessereimodells

Country Status (5)

Country Link
US (1) US4884622A (de)
EP (1) EP0307287B1 (de)
JP (1) JPH01157741A (de)
DE (1) DE3861756D1 (de)
FR (1) FR2620357B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2087763C (en) * 1992-02-11 2002-07-02 Jimmy Cochimin Stator frame for dynamoelectric machine and method for making same
US5681518A (en) * 1995-03-15 1997-10-28 Handy & Harman Automotive Group Process for molding a fuel rail assembly

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1113726B (de) * 1958-03-26 1961-09-14 Siemens Ag Verfahren zum Herstellen von Hochspannungsisolatoren aus Giessharz
FR2479044A1 (fr) * 1980-03-26 1981-10-02 Rozier Guy Fusibles pour pieces de fonderie de tres haute precision, procede de fabrication et applications metallurgiques
US4632169A (en) * 1985-05-01 1986-12-30 Outboard Marine Corporation Two cycle cylinder block foam pattern

Family Cites Families (8)

* 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
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
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1113726B (de) * 1958-03-26 1961-09-14 Siemens Ag Verfahren zum Herstellen von Hochspannungsisolatoren aus Giessharz
FR2479044A1 (fr) * 1980-03-26 1981-10-02 Rozier Guy Fusibles pour pieces de fonderie de tres haute precision, procede de fabrication et applications metallurgiques
US4632169A (en) * 1985-05-01 1986-12-30 Outboard Marine Corporation Two cycle cylinder block foam pattern

Also Published As

Publication number Publication date
US4884622A (en) 1989-12-05
FR2620357A1 (fr) 1989-03-17
DE3861756D1 (de) 1991-03-14
JPH01157741A (ja) 1989-06-21
FR2620357B1 (fr) 1990-01-26
EP0307287B1 (de) 1991-02-06

Similar Documents

Publication Publication Date Title
EP0196987B1 (de) Form zum Herstellen eines Gegenstandes mit wenigstens einem, zwei übereinanderliegende Gussstücke aufweisenden Element
FR2363388A1 (fr) Perfectionnements apportes au moulage
FR2823455A1 (fr) Procede et dispositif pour former des elements positionneurs sur un noyau ceramique
EP0916471B1 (de) Verfahren zur Herstellung von Durchgängen für Achsen in einem gegossenen Kunststoffteil, eine Form und Verwendung des Verfahrens in einer Klappenvorrichtung für Brennkraftmaschinen
FR2572676A1 (fr) Procede et appareil de faconnage de moulages en resine synthetique multicolores
EP3030406B1 (de) Reifenform mit einem ringförmigen einsatzstück zum formen eines profils
FR2544401A1 (fr) Roues de pompe et procede de fabrication par moulage par co-injection
FR2476769A1 (fr) Procede d'assemblage d'un dispositif fluidique
FR2509661A1 (fr) Procede et dispositif de moulage de pieces composites en matiere plastique
FR2903341A1 (fr) Procede de moulage d'un composant pour un interieur de vehicule
CA3014022A1 (fr) Procede de formation de trous de depoussierage pour aube de turbine et noyau ceramique associe
EP0307287B1 (de) Form und Verfahren zur Herstellung eines Giessereimodells
JPS63315217A (ja) レンズ製造方法
BE1006901A3 (fr) Moteur a combustion interne et son procede de fabrication.
EP2111967B1 (de) Vorrichtung zum Formgießen von Behältern einschließlich Mittel zum Regulieren der Volumenmaße des zu formenden Hohlraums
FR2959947A1 (fr) Outillage d'injection d'une piece
EP0307286B1 (de) Verfahren zum Giessen eines Zylinderblockes oder des entsprechenden Giessmodells
BE667499A (de)
FR2669979A1 (fr) Corps de joint de transmission a structure composite.
JPS6140501Y2 (de)
FR2615425A1 (fr) Modele pour procede de moulage a mousse perdue
FR2793174A1 (fr) Procede et dispositif pour la realisation par moulage d'une culasse de moteur a combustion interne
JPS6218330B2 (de)
FR2686040A1 (fr) Moule trois plaques concu pour le surmoulage sur une piece metallique.
JP3270769B2 (ja) プラスチック製品の二色成形方法

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE GB IT

17P Request for examination filed

Effective date: 19890203

17Q First examination report despatched

Effective date: 19900116

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE GB IT

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

REF Corresponds to:

Ref document number: 3861756

Country of ref document: DE

Date of ref document: 19910314

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
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
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19920819

Year of fee payment: 5

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

Ref country code: GB

Payment date: 19920825

Year of fee payment: 5

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

Ref country code: GB

Effective date: 19930901

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

Effective date: 19930901

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

Ref country code: DE

Effective date: 19940601

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 NON-PAYMENT OF DUE FEES;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: 20050901