EP0243287A1 - Apparatus for casting large and thin section aluminium alloy castings - Google Patents

Apparatus for casting large and thin section aluminium alloy castings Download PDF

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Publication number
EP0243287A1
EP0243287A1 EP87420105A EP87420105A EP0243287A1 EP 0243287 A1 EP0243287 A1 EP 0243287A1 EP 87420105 A EP87420105 A EP 87420105A EP 87420105 A EP87420105 A EP 87420105A EP 0243287 A1 EP0243287 A1 EP 0243287A1
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EP
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Prior art keywords
mold
holes
created
enclosure
molding
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EP87420105A
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German (de)
French (fr)
Inventor
Marc Santarini
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Rio Tinto France SAS
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Aluminium Pechiney SA
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Publication of EP0243287A1 publication Critical patent/EP0243287A1/en
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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
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/002—Castings of light metals
    • B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould

Definitions

  • the present invention relates to a quoyde molding of thin and large parts in aluminum alloys.
  • French patent 1,178,083 teaches: "the use of a mold constituted by a sintered and porous material placed in an enclosure in which a relative vacuum is created or includes suction channels so that the liquid metal being introduced into the mold by simple gravity, atmospheric pressure allows the metal to perfectly match the internal profile of the mold through the pores from which the air which previously filled said mold is released. possible to easily produce parts perfectly reproducing the profile of the imprint of the mold ".
  • this material is a sintered metal
  • machining does not completely solve this problem of precision because, more often than not, these sintered metals tend to deform when hot.
  • the plug does not occupy the entire thickness of the mold, it is connected to the enclosure by the hole in which it is fitted or by a hole drilled behind the porous plug and which communicates with the enclosure under vacuum , so that this depression can also be transmitted.
  • This latter arrangement makes it possible to reduce the quantity of porous material.
  • These plugs preferably have a diameter of less than 20 mm and therefore have a very reduced contact surface with the cast metal so that the machining problems posed by the fully porous molds are nonexistent here.
  • holes are preferably placed at the locations of the mold furthest from the place of supply because it is there in general that the evacuation of the air takes place in the worst conditions.
  • the quantity of holes necessary to obtain the best results it obviously depends on the dimensions of the mold. However, it has been found that a hole area at most equal to 50% of the surface of the molded part is perfectly suitable.
  • the vacuum it is a function of the dimensions of the mold, the shape of the part, the number and the arrangement of the plugs. The range of values used is therefore very wide and between 1.10 5 Pa and 1.10 3 Pa.
  • the enclosure can completely surround the mold or on the contrary form two separate parts each in relation with one of the half-shells of the mold so that one can then, at will, create depression on one or the other or on both sides of the molded part.
  • the vacuum is generally made when the mold is supplied with metal but, it can be offset from this moment and preferably it will be done soon after this moment.
  • the vacuum circuit of such a device can be slaved to the supply of the mold by means of control and regulation devices known elsewhere.
  • a mold (1) comprising a conventional lower half-shell (2) and an upper half-shell (3) which according to the invention has porous channels (4) passing through, in the present case, the entire thickness of the mold.
  • These half-shells are partially separated from each other by a gap (5) or imprint of shape corresponding to that of the part to be molded.
  • This imprint is related to a liquid metal supply system composed of a pouring basin (6) pierced at its bottom with an orifice which can optionally be closed by a stopper (7) and which is extended by piping.
  • (8) passing through the upper half-shell up to the level of the cavity and equipped with a metal passage detection probe (9).
  • the vacuum circuit comprising from upstream to downstream a vacuum pump (10), a balloon (11) of large dimensions equipped with a pressure gauge (12), a manual valve (13) , a solenoid valve (14), an adjustable timer (15) connected to the probe (9), a pipe (16) in connection with the enclosure (17) which in this case covers only the top of the upper half-shell .
  • the enclosure (17) is connected to the vacuum circuit in which the valve (13) is open and the solenoid valve (14) closed .
  • the desired vacuum value is displayed on the regulator pressure gauge (12) and the pump (10) is started.
  • the metal is then poured into the basin (6) and the stopper (7) raised; the arrival of the metal in the channel (8) is detected by the probe (9) and the signal transmitted to the timer (15).
  • the air contained in the enclosure (17), the channels (9) and the imprint (5) then escapes through the piping (16) and the metal then gradually fills the imprint down to its smallest recesses.
  • the timer (15) may possibly include a second index which will control the closing of the solenoid valve (14) after a desired time of application of the vacuum.
  • the mold is opened, the part is extracted and the installation ready for a new casting.
  • This device is applicable to a piece molded horizontally but it is obvious that it can be transposed to a piece cast vertically.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Powder Metallurgy (AREA)

Abstract

This device comprising a mould (1) integral with a chamber (17) in which a vacuum is created is characterised in that the mould (1) consists of a material used in atmospheric-pressure moulding, and in that it is perforated, inside, over at least a fraction of its thickness, with holes (4) in which porous stoppers are fitted. The invention can be applied to the production of castings such as, for example, facing panels, engine supports and other castings hitherto made from mechano-welded steel sheet. <IMAGE>

Description

La présente invention est relative à un dispositifyde moulage de pièces minces et de grandes dimensions en alliages d'aluminium.The present invention relates to a dispositifyde molding of thin and large parts in aluminum alloys.

Actuellement, un certain nombre de pièces, telles que, par exemple, les panneaux de façade ou les supports de moteurs, sont obtenus à partir de tôles d'acier mécanosoudées.Currently, a certain number of parts, such as, for example, the facade panels or the engine supports, are obtained from mechanically welded steel sheets.

Dans un souci d'allégement des pièces, l'homme de l'art a été amené pour les réaliser à s'intéresser à d'autres métaux que l'acier et, en particulier, aux alliages d'aluminium.In order to lighten the parts, those skilled in the art have been led to realize them to be interested in metals other than steel and, in particular, in aluminum alloys.

Du fait que ces pièces ne sont généralement pas plates et peuvent présenter soit une section d'épaisseur variable et/ou des parties en relief telles que rebords, ailettes ou nervures,, leur mise en forme ressort plus du point de vue économique des techniques de moulage que des techniques de transformation mécanique comme le laminage, le matriçage, l'emboutissage, etc...Because these parts are generally not flat and may have either a section of variable thickness and / or raised parts such as edges, fins or ribs, their shaping is more apparent from the economic point of view of the techniques of molding as mechanical transformation techniques such as rolling, stamping, stamping, etc.

Toutefois, le moulage de telles pièces, lorsqu'elles sont de grandes dimensions et d'épaisseur faible (2 à 3 mm), pose des problèmes de "venuJ" liés au remplissage plus ou moins complet du moule par le métal liquide, notamment, lorsque le moulage s'effectue en moule permanent ou en sable alimenté par gravité.However, the molding of such parts, when they are large and of small thickness (2 to 3 mm), poses problems of "venusJ" linked to the more or less complete filling of the mold with liquid metal, in particular, when the molding is carried out in a permanent mold or in sand fed by gravity.

Certes, des solutions ont déjà été proposées pour résoudre ce problème. C'est ainsi, par exemple, que le brevet français 1 178 083 enseigne: "l'utilisation d'un moule constitué par un matériau fritté et poreux placé dans une enceinte dans laquelle est créé un vide relatif ou comporte des canaux d'aspiration de telle sorte que le métal liquide étant introduit dans le moule par simple gravité, la pression atmosphérique permette au métal d'épouser parfaitement le profil interne du moule au travers des pores duquel se dégage l'air qui emplissait préalablement ledit moule. Il est ainsi possible de réaliser sans difficulté des pièces reproduisant parfaitement le profil de l'empreinte du moule".Certain solutions have already been proposed to solve this problem. Thus, for example, that French patent 1,178,083 teaches: "the use of a mold constituted by a sintered and porous material placed in an enclosure in which a relative vacuum is created or includes suction channels so that the liquid metal being introduced into the mold by simple gravity, atmospheric pressure allows the metal to perfectly match the internal profile of the mold through the pores from which the air which previously filled said mold is released. possible to easily produce parts perfectly reproducing the profile of the imprint of the mold ".

Toutefois, l'utilisation d'un moule dont la coquille est constituée dans sa totalité par un matériau fritté poreux s'accompagne de grandes difficultés, en particulier dans le cas du moulage de pièces de taille importante et ce, quelle que soit la nature du matériau poreux mis en oeuvre.However, the use of a mold whose shell is made up entirely of a porous sintered material is accompanied by great difficulties, in particular in the case of molding large parts, regardless of the nature of the porous material used.

En effet, si ce matériau est un métal fritté, il est nécessaire pour obtenir une précision dimensionnelle convenable des pièces, de procéder à un usinage du moule avant utilisation, ce qui a pour conséquence de provoquer un bouchage des pores et donc une mauvaise aspiration de l'air. En outre, un tel usinage ne permet pas de résoudre complètement ce problème de précision car, le plus souvent, ces métaux frittés ont tendance à se déformer à chaud.Indeed, if this material is a sintered metal, it is necessary to obtain a suitable dimensional precision of the parts, to carry out a machining of the mold before use, which has the consequence of causing a clogging of the pores and therefore poor suction of the air. In addition, such machining does not completely solve this problem of precision because, more often than not, these sintered metals tend to deform when hot.

Si le moule est en céramique poreuse, les difficultés résident alors dans la mauvaise tenue aux chocs thermiques de ce type de matériau.If the mold is made of porous ceramic, the difficulties then lie in the poor resistance to thermal shock of this type of material.

C'est pourquoi, la demanderesse, cherchant à éviter ces inconvénients, a trouvé un dispositif qui, dans le cadre du moulage en moule permanent, alimenté par gravité et solidaire d'une enceinte dans laquelle est créée une dépression est caractérisé en ce que ledit moule est constitué par un matériau utilisé dans le moulage sous pression atmosphérique et qu'il est percé à l'intérieur et sur une fraction au moins de son épaisseur de trous dans lesquels sont emmanchés des bouchons en matériaux poreux.This is why the applicant, seeking to avoid these drawbacks, has found a device which, in the context of permanent mold molding, fed by gravity and integral with an enclosure in which a depression is created is characterized in that said mold is constituted by a material used in molding under atmospheric pressure and that it is drilled inside and over at least a fraction of its thickness of holes in which plugs of porous materials are fitted.

Ainsi l'invention utilise-t-elle la technique de moulage en moule permanent, sous dépression, enseignée dans le brevet français 1 178 083 mais elle s'en différencie par deux caractéristiques essentielles:

  • - d'une part, le moule n'est pas constitué par un matériau poreux mais, par un matériau classique utilisé dans les procédés de coulée en coquille où il n'y a pas d'enceinte et où le moule fonctionne à la pression atmosphérique. Un tel matériau, qui peut être, par exemple, une fonte lamellaire perlitique, est d'un prix nettement plus bas que n'importe quel matériau poreux et en tout cas possède, outre une bonne résistance aux chocs thermiques, une excellente stabilité dimensionnelle à chaud;
  • - d'autre part, ce moule est percé à l'intérieur, c'est-à-dire du côté où il est en contact avec le métal moulé, de trous dont la longueur peut être égale ou, de préférence, inférieure à l'épaisseur du moule. Dans ces trous sont emmanchés des bouchons en matériau poreux qui peut être une céramique ou un métal fritté. De préférence, on utilise des bouchons en acier inoxydable fritté. Ces bouchons transmettent la dépression dans l'enceinte en des points bien précis de l'intérieur du moule.
Thus, the invention uses the technique of molding in a permanent mold, under vacuum, taught in French patent 1,178,083 but it differs therefrom by two essential characteristics:
  • - On the one hand, the mold is not made of a porous material but, by a conventional material used in shell casting processes where there is no enclosure and where the mold operates at atmospheric pressure . Such a material, which can be, for example, a pearlitic lamellar cast iron, is considerably cheaper than any which porous material and in any case has, in addition to good resistance to thermal shock, excellent dimensional stability when hot;
  • - on the other hand, this mold is drilled on the inside, that is to say on the side where it is in contact with the molded metal, with holes the length of which can be equal or, preferably, less than 1 'thickness of the mold. In these holes are fitted plugs of porous material which may be a ceramic or a sintered metal. Preferably, sintered stainless steel plugs are used. These plugs transmit the vacuum in the enclosure at very specific points inside the mold.

Dans le cas où le bouchon n'occupe pas toute l'épaisseur du moule, il est relié à l'enceinte par le trou dans lequel il est emmanché ou par un orifice percé derrière le bouchon poreux et qui communique avec l'enceinte en dépression, de manière à pouvoir transmettre également cette dépression. Cette dernière disposition permet de réduire la quantité de matériau poreux.In the case where the plug does not occupy the entire thickness of the mold, it is connected to the enclosure by the hole in which it is fitted or by a hole drilled behind the porous plug and which communicates with the enclosure under vacuum , so that this depression can also be transmitted. This latter arrangement makes it possible to reduce the quantity of porous material.

Ces bouchons ont de préférence un diamètre inférieur à 20 mm et présentent donc une surface de contact avec le métal coulé très réduite de sorte que- les problèmes d'usinage posés par les moules entièrement poreux sont ici inexistants.These plugs preferably have a diameter of less than 20 mm and therefore have a very reduced contact surface with the cast metal so that the machining problems posed by the fully porous molds are nonexistent here.

Ces trous sont disposés de préférence aux endroits du moule les plus éloignés du lieu d'alimentation car c'est là en général que l'évacuation de l'air s'effectue dans les plus mauvaises conditions. Quant à la quantité de trous nécessaires pour obtenir les meilleurs résultats, elle est évidemment fonction des dimensions du moule. Toutefois, on a trouvé qu'une surface de trous au plus égale à 50 % de la surface de la pièce moulée convenait parfaitement.These holes are preferably placed at the locations of the mold furthest from the place of supply because it is there in general that the evacuation of the air takes place in the worst conditions. As for the quantity of holes necessary to obtain the best results, it obviously depends on the dimensions of the mold. However, it has been found that a hole area at most equal to 50% of the surface of the molded part is perfectly suitable.

En ce qui concerne la dépression, elle est fonction des dimensions du moule, de la forme de la pièce, du nombre et de la disposition des bouchons. La fourchette de valeurs utilisée est donc très large et comprise entre 1.105 Pa et 1.103 Pa.Regarding the vacuum, it is a function of the dimensions of the mold, the shape of the part, the number and the arrangement of the plugs. The range of values used is therefore very wide and between 1.10 5 Pa and 1.10 3 Pa.

L'enceinte peut entourer complètement le moule ou au contraire former deux parties séparées en relation chacune avec l'une des demi-coquilles du moule de sorte qu'on peut alors, à volonté, créer la dépression sur l'une ou l'autre ou sur les deux faces de la pièce moulée.The enclosure can completely surround the mold or on the contrary form two separate parts each in relation with one of the half-shells of the mold so that one can then, at will, create depression on one or the other or on both sides of the molded part.

La mise sous dépression est généralement faite au moment où le moule est alimenté en métal mais, elle peut être décalée par rapport à ce moment et de préférence elle se fera peu après ce moment.The vacuum is generally made when the mold is supplied with metal but, it can be offset from this moment and preferably it will be done soon after this moment.

Le circuit de mise sous dépression d'un tel dispositif peut être asservi à l'alimentation du moule au moyen d'appareils de contrôle et de régulation connus par ailleurs.The vacuum circuit of such a device can be slaved to the supply of the mold by means of control and regulation devices known elsewhere.

L'invention sera mieux comprise à l'aide de la figure ci-jointe qui représente en coupe verticale un dispositif de moulage et un circuit de mise sous dépression.The invention will be better understood using the attached figure which shows a vertical section of a molding device and a vacuum circuit.

On y voit un moule (1) comprenant une demi-coquille inférieure (2) classique et une demi-coquille supérieure (3) qui conformément à l'invention présente des canaux poreux (4) traversant, dans le cas présent, toute l'épaisseur du moule. Ces demi-coquilles sont partiellement séparées l'une de l'autre par un intervalle (5) ou empreinte de forme correspondante à celle de la pièce à mouler. Cette empreinte est en relation avec un système d'alimentation en métal liquide composé d'un bassin de coulée (6) percé en son fond d'un orifice qui peut être éventuellement obturé par une quenouille (7) et qui est prolongé par une tuyauterie (8) traversant la demi-coquille supérieure jusqu'au niveau de l'empreinte et équipée d'une sonde (9) de détection de passage du métal.We see a mold (1) comprising a conventional lower half-shell (2) and an upper half-shell (3) which according to the invention has porous channels (4) passing through, in the present case, the entire thickness of the mold. These half-shells are partially separated from each other by a gap (5) or imprint of shape corresponding to that of the part to be molded. This imprint is related to a liquid metal supply system composed of a pouring basin (6) pierced at its bottom with an orifice which can optionally be closed by a stopper (7) and which is extended by piping. (8) passing through the upper half-shell up to the level of the cavity and equipped with a metal passage detection probe (9).

On voit également sur cette figure le circuit de mise sous dépression comportant d'amont en aval une pompe à vide (10), un ballon (11) de grandes dimensions équipé d'un manomètre régulateur (12), une vanne manuelle (13), une électrovanne (14), une minuterie (15) réglable reliée à la sonde (9), une tuyauterie (16) en liaison avec l'enceinte (17) qui dans le cas présent recouvre uniquement le dessus de la demi-coquille supérieure.We also see in this figure the vacuum circuit comprising from upstream to downstream a vacuum pump (10), a balloon (11) of large dimensions equipped with a pressure gauge (12), a manual valve (13) , a solenoid valve (14), an adjustable timer (15) connected to the probe (9), a pipe (16) in connection with the enclosure (17) which in this case covers only the top of the upper half-shell .

En fonctionnement, les deux coquilles du moule ayant été appliquées l'une contre l'autre, l'enceinte (17) est reliée au circuit de mise sous dépression dans lequel la vanne (13) est ouverte et l'électrovanne (14) fermée. La valeur de la dépression souhaitée est affichée sur le manomètre régulateur (12) et la pompe (10) est mise en route. Puis, on règle l'index de la minuterie (15) sur le temps qui doit séparer le moment où la sonde (19) détecte l'arrivée de métal et le moment de la mise sous dépression de l'enceinte (17) et corrélativement de l'empreinte (5).In operation, the two mold shells having been applied one against the other, the enclosure (17) is connected to the vacuum circuit in which the valve (13) is open and the solenoid valve (14) closed . The desired vacuum value is displayed on the regulator pressure gauge (12) and the pump (10) is started. Then, we set the timer index (15) on the time which must separate the moment when the probe (19) detects the arrival of metal and the moment when the enclosure (17) is placed under vacuum and correspondingly of the imprint (5).

Le métal est alors versé dans le bassin (6) et la quenouille (7) soulevée; l'arrivée du métal dans le canal (8) est détectée par la sonde (9) et le signal transmis à la minuterie (15). Le temps affiché sur la minuterie (15) étant écoulé, l'électrovanne (14) s'ouvre. L'air contenu dans l'enceinte (17), les canaux (9) et l'empreinte (5) s'échappe alors par la tuyauterie (16) et le métal remplit alors progressivement l'empreinte jusque dans ses moindres recoins.The metal is then poured into the basin (6) and the stopper (7) raised; the arrival of the metal in the channel (8) is detected by the probe (9) and the signal transmitted to the timer (15). The time displayed on the timer (15) having elapsed, the solenoid valve (14) opens. The air contained in the enclosure (17), the channels (9) and the imprint (5) then escapes through the piping (16) and the metal then gradually fills the imprint down to its smallest recesses.

La minuterie (15) peut éventuellement comporter un deuxième index qui commandera la fermeture de l'électrovanne (14) après un temps souhaité d'application de la dépression.The timer (15) may possibly include a second index which will control the closing of the solenoid valve (14) after a desired time of application of the vacuum.

Après solidification de la pièce, le moule est ouvert, la pièce est extraite et l'installation prête pour une nouvelle coulée.After the part has solidified, the mold is opened, the part is extracted and the installation ready for a new casting.

Ce dispositif est applicable à une pièce moulée horizontalement mais il est évident qu'il est transposable à une pièce coulée verticalement.This device is applicable to a piece molded horizontally but it is obvious that it can be transposed to a piece cast vertically.

L'invention peut être illustrée à l'aide de l'exemple d'application suivant :

  • Une pièce de type "support moteur", de longueur et de largeur hors tout : 195 mm x 154 mm, présentant des nervures de hauteur de 10 à 35 mm, en alliage d'aluminium du type ASIOG, a été coulée dans un moule comportant deux demi-coquilles en acier. La demi-coquille supérieure était percée de 20 trous de diamètre 10 mm. La mise sous une dépression d'environ 5.104 Pascals a été appliquée 0,12 seconde après le moment du début de l'alimentation.
The invention can be illustrated using the following example of application:
  • A part of the "engine support" type, of overall length and width: 195 mm × 154 mm, having ribs from 10 to 35 mm in height, made of aluminum alloy of the ASIOG type, was cast in a mold comprising two steel half-shells. The upper half-shell was pierced with 20 holes with a diameter of 10 mm. The setting under a depression of approximately 5.10 4 Pascals was applied 0.12 seconds after the moment from the start of feeding.

On a obtenu une pièce reproduisant fidèlement la forme de l'empreinte et ne présentant aucun défaut interne ou superficiel.We obtained a part faithfully reproducing the shape of the imprint and having no internal or superficial defect.

Claims (7)

1. Dispositif de moulage de pièces minces et de grandes dimensions en alliages d'aluminium comprenant un moule (1) alimenté par gravité, solidaire d'une enceinte (17) dans laquelle est créée une dépression caractérisé en ce que le moule est constitué par un matériau utilisé dans le moulage sous pression atmosphérique et qu'il est percé à l'intérieur sur une fraction au moins de son épaisseur de trous dans lesquels sont emmanchés des bouchons (6) en matériau poreux.1. Device for molding thin and large parts made of aluminum alloys comprising a mold (1) fed by gravity, integral with an enclosure (17) in which a depression is created, characterized in that the mold is constituted by a material used in atmospheric pressure molding and that it is drilled inside on at least a fraction of its thickness of holes in which plugs (6) of porous material are fitted. 2. Dispositif selon la revendication 1 caractérisé en ce que le matériau poreux est en acier inoxydable fritté.2. Device according to claim 1 characterized in that the porous material is made of sintered stainless steel. 3. Dispositif selon la revendication 1, caractérisé en ce que le diamètre de chaque trou est inférieur à 20 mm.3. Device according to claim 1, characterized in that the diameter of each hole is less than 20 mm. 4. Dispositif selon la revendication 1 caractérisé en ce que les trous sont disposés en des points éloignés du lieu d'alimentation du moule.4. Device according to claim 1 characterized in that the holes are arranged at points remote from the place of supply of the mold. 5. Dispositif selon la revendication 1 caractérisé en ce que la surface des trous représente au plus 50 % de la surface de la pièce moulée.5. Device according to claim 1 characterized in that the surface of the holes represents at most 50% of the surface of the molded part. 6. Dispositif selon la revendication 1, caractérisé en ce que le vide relatif est créé au plus tôt au moment de l'alimentation en métal du moule.6. Device according to claim 1, characterized in that the relative vacuum is created at the earliest at the time of the metal supply to the mold. 7. Dispositif selon la revendication 1 caractérisé en ce que la dépression est créée au moyen d'une pompe (10) par l'intermédiaire d'un ballon (11) de grandes dimensions muni d'un manomètre (12) qui commande le fonctionnement de la pompe, d'une tuyauterie équipée d'une vanne (13), d'une électrovanne (14) dont l'ouverture est réglée par une minuterie (15) dont le fonctionnement est lié à un signal émis par une sonde (9) qui détecte le moment où le moule est alimenté.7. Device according to claim 1 characterized in that the depression is created by means of a pump (10) via a balloon (11) of large dimensions provided with a pressure gauge (12) which controls the operation of the pump, of a pipe fitted with a valve (13), of a solenoid valve (14) whose opening is regulated by a timer (15) whose operation is linked to a signal emitted by a probe (9 ) which detects when the mold is fed.
EP87420105A 1986-04-23 1987-04-21 Apparatus for casting large and thin section aluminium alloy castings Withdrawn EP0243287A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8606558 1986-04-23
FR8606558A FR2597770A1 (en) 1986-04-23 1986-04-23 DEVICE FOR MOLDING THIN PIECES AND LARGE DIMENSIONS OF ALUMINUM ALLOYS

Publications (1)

Publication Number Publication Date
EP0243287A1 true EP0243287A1 (en) 1987-10-28

Family

ID=9334986

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87420105A Withdrawn EP0243287A1 (en) 1986-04-23 1987-04-21 Apparatus for casting large and thin section aluminium alloy castings

Country Status (13)

Country Link
EP (1) EP0243287A1 (en)
JP (1) JPS62254957A (en)
KR (1) KR870009791A (en)
BR (1) BR8701899A (en)
DK (1) DK202187A (en)
FI (1) FI871751A (en)
FR (1) FR2597770A1 (en)
IL (1) IL82241A0 (en)
IS (1) IS3217A7 (en)
MA (1) MA20950A1 (en)
NO (1) NO871670L (en)
PT (1) PT84733B (en)
TN (1) TNSN87058A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0325864A2 (en) * 1988-01-25 1989-08-02 General Motors Corporation Countergravity casting apparatus
EP0715915A1 (en) * 1994-12-06 1996-06-12 Showa Denko Kabushiki Kaisha Metallic ingot for plastic working and method for producing the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1090227A (en) * 1953-09-09 1955-03-29 Universal Castings Corp Improvements to molding devices and their method of use
FR1178083A (en) * 1957-06-12 1959-05-04 Soralco Casting process for foundry alloys
FR2452986A1 (en) * 1978-10-02 1980-10-31 Hitchiner Manufacturing Co APPARATUS FOR METAL CASTING UNDER REDUCED PRESSURE IN A SELF-SUPPORTING RIGID MOLD GAS PERMEABLE

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1090227A (en) * 1953-09-09 1955-03-29 Universal Castings Corp Improvements to molding devices and their method of use
FR1178083A (en) * 1957-06-12 1959-05-04 Soralco Casting process for foundry alloys
FR2452986A1 (en) * 1978-10-02 1980-10-31 Hitchiner Manufacturing Co APPARATUS FOR METAL CASTING UNDER REDUCED PRESSURE IN A SELF-SUPPORTING RIGID MOLD GAS PERMEABLE

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0325864A2 (en) * 1988-01-25 1989-08-02 General Motors Corporation Countergravity casting apparatus
EP0325864A3 (en) * 1988-01-25 1990-08-01 General Motors Corporation Countergravity casting apparatus
EP0715915A1 (en) * 1994-12-06 1996-06-12 Showa Denko Kabushiki Kaisha Metallic ingot for plastic working and method for producing the same
US5769147A (en) * 1994-12-06 1998-06-23 Showa Denko Kabushikikaisha Method for producing metallic ingot for plastic working
US5989365A (en) * 1994-12-06 1999-11-23 Showa Denko Kabushiki Kaisha Metallic ingot for plastic working
EP1118402A1 (en) * 1994-12-06 2001-07-25 Showa Denko Kabushiki Kaisha Metallic ingot for plastic working and method for producing the same

Also Published As

Publication number Publication date
FR2597770A1 (en) 1987-10-30
IL82241A0 (en) 1987-10-30
BR8701899A (en) 1988-02-02
PT84733A (en) 1987-05-01
PT84733B (en) 1989-06-05
JPS62254957A (en) 1987-11-06
DK202187D0 (en) 1987-04-21
NO871670L (en) 1987-10-26
KR870009791A (en) 1987-11-30
FI871751A0 (en) 1987-04-22
DK202187A (en) 1987-10-24
MA20950A1 (en) 1987-12-31
FI871751A (en) 1987-10-24
IS3217A7 (en) 1987-09-21
NO871670D0 (en) 1987-04-22
TNSN87058A1 (en) 1990-01-01

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