EP0307287A1 - Form und Verfahren zur Herstellung eines Giessereimodells - Google Patents
Form und Verfahren zur Herstellung eines Giessereimodells Download PDFInfo
- 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
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)
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)
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)
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)
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 |
-
1987
- 1987-09-11 FR FR8712642A patent/FR2620357B1/fr not_active Expired - Fee Related
-
1988
- 1988-09-01 DE DE8888402208T patent/DE3861756D1/de not_active Expired - Fee Related
- 1988-09-01 EP EP88402208A patent/EP0307287B1/de not_active Expired - Lifetime
- 1988-09-08 US US07/241,949 patent/US4884622A/en not_active Expired - Fee Related
- 1988-09-08 JP JP63225514A patent/JPH01157741A/ja active Pending
Patent Citations (3)
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 |