WO1995020449A1 - Method and device for casting molten metal in a mould - Google Patents
Method and device for casting molten metal in a mould Download PDFInfo
- Publication number
- WO1995020449A1 WO1995020449A1 PCT/FR1995/000089 FR9500089W WO9520449A1 WO 1995020449 A1 WO1995020449 A1 WO 1995020449A1 FR 9500089 W FR9500089 W FR 9500089W WO 9520449 A1 WO9520449 A1 WO 9520449A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- molten metal
- injection tube
- membrane
- metal
- enclosure
- 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.)
- Ceased
Links
Classifications
-
- 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
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/006—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using reactive gases
Definitions
- the present invention relates to a device for casting molten metal into a mold.
- low-pressure casting devices comprising a first enclosure in which is arranged a crucible containing the molten metal, and a second enclosure comprising a mold and an injection tube arranged to communicate with the molten metal .
- these devices do not allow a change of mold without causing a notable disturbance of the atmosphere above the molten metal.
- a device for casting a molten metal comprising a first sealed enclosure in which the molten metal is placed, connected by an injection tube to a mold placed in a second sealed enclosure, a separation member. being disposed on the injection tube outside the first enclosure, at a level higher than the molten metal when the injection tube is engaged in the molten metal.
- the separation member can be operated or restored without disturbing the atmosphere above the crucible.
- the separation member is disposed at one end of the injection tube adjacent to the second enclosure.
- the separating member can be operated or restored when the second enclosure is opened to take the filled mold and replace it with an empty mold.
- the separation member comprises a fusible metal membrane.
- the metal membrane has a composition identical or similar to the molten metal.
- the molten metal is retained by it, then it is released after melting of the membrane to spread in the mold.
- the device comprises a filter adjacent to the membrane, downstream of the latter by reference to the displacement of the molten metal in the injection tube in order to minimize the deformation of the membrane during a depression of the mold, and an annular wall disposed in the injection tube and delimiting therewith a blind annular space having a bottom offset from the fusible membrane downstream thereof so that during the rise of the metal molten in the injection tube most of the gas empri ⁇ son Avenue in the injection tube spreads in the annular space and therefore does not prevent the coming into contact of the molten metal with the fusible metal membrane.
- FIG. 1 is a schematic sectional view of a casting device according to the invention, -
- FIG. 1 is a sectional view of an embodiment of a separation member for the device of Figure 1.
- the device according to the invention comprises a crucible 1 surmounted by a removable cover 2 forming with the crucible 1 a first sealed enclosure containing a molten metal 3 having a free surface 4.
- the cover 2 comprises hatches visit 5 allowing, in a manner known per se, to add alloying elements or to put in place the devices necessary for conducting the fusion.
- the crucible 1 is sealed by refractory seals allowing the pressurization from a few decibars to a few bars, or vacuuming.
- the crucible 1 fitted with the cover 2 is placed inside a sealed or non-sealed oven 6 depending on the pressure level inside the crucible.
- a supply tube 7 connects the interior of the crucible to a source of gas under pressure, not shown.
- a mold 8 is placed above the crucible in a second sealed enclosure 9 and comprises, in a manner known per se, sensory organs not shown such as metal presence sensors, pressure sensors, and temperature sensors making it possible to control precisely the course of the casting.
- the mold 8 and the crucible 1 are connected by an injection tube 10 on which is disposed a separation member 11 such as a knife gate valve or a separation member as illustrated in FIG. 2.
- a separation member 11 such as a knife gate valve or a separation member as illustrated in FIG. 2.
- the separation member comprises a fusible metal membrane 12, for example a membrane having a composition identical to or close to that of the molten metal alloy.
- the fusible membrane 12 is disposed at the end of the injection tube 10 adjacent to the second enclosure 9 and is supported on a shoulder 13 extending radially inward of an annular wall 14 which s extends axially inside the injection tube 10.
- a metal or ceramic filter 15 is disposed downstream of the membrane 12 by reference to the displacement of the molten metal in the injection tube 10.
- the membrane 12 is mounted in a sealed manner in the injection tube 10, preferably in a manner allowing rapid replacement of the membrane 12, for example by mounting it removably in the annular wall 14, the membrane 12 being pressed against the internal shoulder 13 by the filter 15 itself kept pressed against the membrane 12 by a spacer 16 which bears on the underside 17 of the enclosure 9.
- the annular wall 14 disposed in the injection tube 10_ defines therewith a blind annular space 18 having a bottom 19 offset from the fusible membrane 12 downstream thereof. It will be noted that the presence of a separation member 11 on the injection tube 10 makes it possible not only to subject the mold and the molten metal to different pressures but also to maintain atmospheres of different compositions above the molten metal and in the mold.
- the enclosure 9 comprises a supply tube 21 and a suction tube 22.
- the interior of the crucible 1 is pressurized and the metal gradually rises in the injection tube 10.
- the surface of the metal reaches the lower edge of the annular wall 14
- most of the gas which was trapped between the fusible membrane 12 and the upper surface of the molten metal spreads in the annular gap 18 so that the gas included in the space 23 internal to the annular wall 14 can be easily compressed or even expelled by the rise of the molten metal.
- This arrangement promotes the rise of the molten metal in the central part of the injection tube 10 and allows bringing the molten metal into contact with the fusible membrane 12 to ensure that the latter melts and opens the separation member.
- the pressure in the enclosure 9 containing the mold can be varied.
- the invention also makes it possible to obtain composite material by infiltration of the liquid metal within a network of fibers or pores, this infiltration being facilitated by the depressurization of the enclosure containing the composite element.
- the membrane 12 When a casting has been carried out, the membrane 12 is very easily replaced, the membrane support 14 being subjected to tolerable heating.
- the fusible membrane can be replaced by a valve which can, if necessary, be controlled remotely before the opening of the enclosure containing the mold, so that the atmosphere above the molten metal is in no way disturbed.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
Procédé et dispositif de coulée d'un métal fondu dans un moule Method and device for casting molten metal into a mold
La présente invention concerne un dispositif de coulée d'un métal fondu dans un moule.The present invention relates to a device for casting molten metal into a mold.
On connaît différents dispositifs permettant la fabrication de pièces moulées et notamment de pièces coulées sous basse pression. En particulier, on connaît des dispositifs de coulée basse pression comportant une première enceinte dans laquelle est disposé un creuset contenant le métal fondu, et une seconde enceinte compor¬ tant un moule et un tube d'injection disposé pour communi- quer avec le métal fondu. D'une façon générale ces disposi¬ tifs ne permettent pas un changement de moule sans entraî¬ ner une perturbation notable de l'atmosphère au-dessus du métal en fusion.Various devices are known for manufacturing molded parts and in particular low pressure cast parts. In particular, low-pressure casting devices are known comprising a first enclosure in which is arranged a crucible containing the molten metal, and a second enclosure comprising a mold and an injection tube arranged to communicate with the molten metal . In general, these devices do not allow a change of mold without causing a notable disturbance of the atmosphere above the molten metal.
Selon l'invention on propose un dispositif de coulée d'un métal fondu, comportant une première enceinte étanche dans laquelle est disposée le métal fondu, reliée par un tube d'injection à un moule disposé dans une seconde enceinte étanche, un organe de séparation étant disposé sur le tube d'injection à l'extérieur de la première enceinte, à un niveau supérieur au métal fondu lorsque le tube d'injection est engagé dans le métal fondu.According to the invention there is provided a device for casting a molten metal, comprising a first sealed enclosure in which the molten metal is placed, connected by an injection tube to a mold placed in a second sealed enclosure, a separation member. being disposed on the injection tube outside the first enclosure, at a level higher than the molten metal when the injection tube is engaged in the molten metal.
Ainsi l'organe de séparation peut être manoeuvré ou rétabli sans perturber l'atmosphère au-dessus du creuset. Selon une version avantageuse de l'invention, l'organe de séparation est disposé à une extrémité du tube d'injection adjacente à la seconde enceinte.Thus, the separation member can be operated or restored without disturbing the atmosphere above the crucible. According to an advantageous version of the invention, the separation member is disposed at one end of the injection tube adjacent to the second enclosure.
Ainsi l'organe de séparation peut être manoeuvré ou rétabli lors de l'ouverture de la seconde enceinte pour prélever le moule rempli et le remplacer par un moule vide.Thus the separating member can be operated or restored when the second enclosure is opened to take the filled mold and replace it with an empty mold.
Selon un mode de réalisation avantageux de l'invention, l'organe de séparation comporte une membrane métallique fusible. De préférence, la membrane métallique a une composition identique ou semblable au métal fondu. Ainsi, pendant le temps de fusion de la membrane le métal fondu est retenu par celle-ci puis il est libéré après fusion de la membrane pour se répandre dans le moule.According to an advantageous embodiment of the invention, the separation member comprises a fusible metal membrane. Preferably, the metal membrane has a composition identical or similar to the molten metal. Thus, during the melting time of the membrane, the molten metal is retained by it, then it is released after melting of the membrane to spread in the mold.
Selon des aspects avantageux de l'invention, le dispositif comporte un filtre adjacent à la membrane, en aval de celle-ci par référence au déplacement du métal fondu dans le tube d'injection afin de minimiser la déformation de la membrane lors d'une mise en dépression du moule, et une paroi annulaire disposée dans le tube d'injection et délimitant avec celui-ci un espace annulaire borgne ayant un fond décalé de la membrane fusible en aval de celle-ci de sorte que lors de la montée du métal fondu dans le tube d'injection la majeure partie du gaz empri¬ sonné dans le tube d'injection se répand dans l'espace annulaire et ne fait donc pas obstacle à l'entrée en contact du métal fondu avec la membrane métallique fusible. D'autres caractéristiques et avantages de l'in¬ vention apparaîtront à la lecture de la description qui suit de modes de réalisation non limitatifs de l'invention en référence aux figures ci-jointes parmi lesquelles :According to advantageous aspects of the invention, the device comprises a filter adjacent to the membrane, downstream of the latter by reference to the displacement of the molten metal in the injection tube in order to minimize the deformation of the membrane during a depression of the mold, and an annular wall disposed in the injection tube and delimiting therewith a blind annular space having a bottom offset from the fusible membrane downstream thereof so that during the rise of the metal molten in the injection tube most of the gas empri¬ sonnée in the injection tube spreads in the annular space and therefore does not prevent the coming into contact of the molten metal with the fusible metal membrane. Other characteristics and advantages of the invention will appear on reading the following description of nonlimiting embodiments of the invention with reference to the attached figures, among which:
- la figure 1 est une vue en coupe schématique d'un dispositif de coulée selon l'invention , -- Figure 1 is a schematic sectional view of a casting device according to the invention, -
- la figure 2 est une vue en coupe d'un mode de réalisation d'un organe de séparation pour le dispositif de la figure 1.- Figure 2 is a sectional view of an embodiment of a separation member for the device of Figure 1.
En référence aux figures, le dispositif selon l'invention comporte un creuset 1 surmonté d'un couvercle démontable 2 formant avec le creuset 1 une première enceinte étanche contenant un métal en fusion 3 ayant une surface libre 4. Le couvercle 2 comporte des trappes de visite 5 permettant d'une façon connue en soi d'ajouter des éléments d'alliage ou de mettre en place des dispositifs nécessaires à la conduite de la fusion. L'étanchéité du creuset 1 est assurée par des joints réfractaires permet- tant la mise en pression de quelques décibars à quelques bars, ou la mise sous vide.Referring to the figures, the device according to the invention comprises a crucible 1 surmounted by a removable cover 2 forming with the crucible 1 a first sealed enclosure containing a molten metal 3 having a free surface 4. The cover 2 comprises hatches visit 5 allowing, in a manner known per se, to add alloying elements or to put in place the devices necessary for conducting the fusion. The crucible 1 is sealed by refractory seals allowing the pressurization from a few decibars to a few bars, or vacuuming.
Le creuset 1 équipé du couvercle 2 est disposé à l'intérieur d'un four 6 étanche ou non selon le niveau de pression à l'intérieur du creuset. Un tube d'alimentation 7 relie l'intérieur du creuset à une source de gaz sous pression non représentée.The crucible 1 fitted with the cover 2 is placed inside a sealed or non-sealed oven 6 depending on the pressure level inside the crucible. A supply tube 7 connects the interior of the crucible to a source of gas under pressure, not shown.
Un moule 8 est disposé au dessus du creuset dans une seconde enceinte étanche 9 et comporte de façon connue en soi des organes sensoriels non représentés tels que des capteurs de présence de métal, des capteurs de pression, et des capteurs de température permettant de commander de façon précise le déroulement de la coulée.A mold 8 is placed above the crucible in a second sealed enclosure 9 and comprises, in a manner known per se, sensory organs not shown such as metal presence sensors, pressure sensors, and temperature sensors making it possible to control precisely the course of the casting.
Le moule 8 et le creuset l sont reliés par un tube d'injection 10 sur lequel est disposé un organe de séparation 11 telle qu'une vanne à guillotine ou un organe de séparation comme illustré sur la figure 2.The mold 8 and the crucible 1 are connected by an injection tube 10 on which is disposed a separation member 11 such as a knife gate valve or a separation member as illustrated in FIG. 2.
Dans le mode de réalisation illustré sur la figure 2, l'organe de séparation comporte une membrane métallique fusible 12, par exemple une membrane ayant une composition identique ou voisine de celle de l'alliage de métal fondu. La membrane fusible 12 est disposée à l'extré¬ mité du tube d'injection 10 adjacente à la seconde enceinte 9 et prend appui sur un épaulement 13 s'étendant radiale- ment vers l'intérieur d'une paroi annulaire 14 qui s'étend axialement à l'intérieur du tube d'injection 10. Un filtre métallique ou céramique 15 est disposé en aval de la membrane 12 par référence au déplacement du métal fondu dans le tube d'injection 10. La membrane 12 est montée de façon étanche dans le tube d'injection 10, de préférence d'une façon permettant un remplacement rapide de la membrane 12, par exemple en la montant de façon amovible dans la paroi annulaire 14, la membrane 12 étant plaquée contre l'épaulement interne 13 par le filtre 15 lui-même maintenu plaqué contre la membrane 12 par une entretoise 16 qui est en appui sur la face inférieure 17 de l'enceinte 9. Dans ce mode de réalisation, la paroi annulaire 14 disposée dans le tube d'injection 10_ délimite avec celui-ci un espace annulaire borgne 18 ayant un fond 19 décalé de la membrane fusible 12 en aval de celle-ci. On remarquera que la présence d'un organe de séparation 11 sur le tube d'injection 10 permet non seulement de soumettre le moule et le métal fondu à des pressions différentes mais également de maintenir des atmosphères de compositions différentes au-dessus du métal fondu et dans le moule. En particulier, lorsque l'on utilise dans la première enceinte contenant le métal fondu un mélange de gaz carbonique et de fluorure de soufre afin d'éviter une oxydation du métal il s'avère qu'un tel mélange nuit à un bon écoulement du métal dans le moule où la température est plus basse que dans le creuset. Avant de procéder à une mise en dépression de la seconde enceinte 9 contenant le moule 8, on effectue donc de préférence un balayage de cette enceinte au moyen d'un gaz plus favorable à un écoulement du métal dans le moule puis on met l'en- ceinte 9 en dépression jusqu'à ce que l'intérieur du moule soit à une pression légèrement supérieure à la pression qui provoquerait une vaporisation du métal à la température à laquelle il pénètre dans le moule. A cet effet, l'enceinte 9 comporte un tube d'alimentation 21 et un tube d'aspira- tion 22. Parallèlement, l'intérieur du creuset 1 est mis en pression et le métal monte progressivement dans le tube d'injection 10. Au moment où la surface du métal atteint le bord inférieur de la paroi annulaire 14, la majeure partie du gaz qui était emprisonné entre la membrane fusible 12 et la surface supérieure du métal fondu se répand dans l'intervalle annulaire 18 de sorte que le gaz compris dans l'espace 23 interne à la paroi annulaire 14 peut être aisément comprimé ou même chassé par la montée du métal fondu. Cette disposition favorise la montée du métal fondu dans la partie centrale du tube d'injection 10 et permet une mise en contact du métal fondu avec la membrane fusible 12 pour assurer une fusion de celle-ci et.1'ouverture de l'organe de séparation.In the embodiment illustrated in FIG. 2, the separation member comprises a fusible metal membrane 12, for example a membrane having a composition identical to or close to that of the molten metal alloy. The fusible membrane 12 is disposed at the end of the injection tube 10 adjacent to the second enclosure 9 and is supported on a shoulder 13 extending radially inward of an annular wall 14 which s extends axially inside the injection tube 10. A metal or ceramic filter 15 is disposed downstream of the membrane 12 by reference to the displacement of the molten metal in the injection tube 10. The membrane 12 is mounted in a sealed manner in the injection tube 10, preferably in a manner allowing rapid replacement of the membrane 12, for example by mounting it removably in the annular wall 14, the membrane 12 being pressed against the internal shoulder 13 by the filter 15 itself kept pressed against the membrane 12 by a spacer 16 which bears on the underside 17 of the enclosure 9. In this embodiment, the annular wall 14 disposed in the injection tube 10_ defines therewith a blind annular space 18 having a bottom 19 offset from the fusible membrane 12 downstream thereof. It will be noted that the presence of a separation member 11 on the injection tube 10 makes it possible not only to subject the mold and the molten metal to different pressures but also to maintain atmospheres of different compositions above the molten metal and in the mold. In particular, when a mixture of carbon dioxide and sulfur fluoride is used in the first enclosure containing the molten metal in order to avoid oxidation of the metal, it turns out that such a mixture is detrimental to good flow of the metal. in the mold where the temperature is lower than in the crucible. Before depressurizing the second enclosure 9 containing the mold 8, it is therefore preferably carried out a sweeping of this enclosure by means of a gas more favorable to a flow of metal in the mold and then the - belt 9 in depression until the inside of the mold is at a pressure slightly higher than the pressure which would cause vaporization of the metal at the temperature at which it enters the mold. To this end, the enclosure 9 comprises a supply tube 21 and a suction tube 22. At the same time, the interior of the crucible 1 is pressurized and the metal gradually rises in the injection tube 10. By the time the surface of the metal reaches the lower edge of the annular wall 14, most of the gas which was trapped between the fusible membrane 12 and the upper surface of the molten metal spreads in the annular gap 18 so that the gas included in the space 23 internal to the annular wall 14 can be easily compressed or even expelled by the rise of the molten metal. This arrangement promotes the rise of the molten metal in the central part of the injection tube 10 and allows bringing the molten metal into contact with the fusible membrane 12 to ensure that the latter melts and opens the separation member.
Au fur et à mesure de la réalisation de la coulée, on peut faire varier la pression dans l'enceinte 9 contenant le moule 8. En particulier, on peut dans un premier temps abaisser la pression au début du refroidisse¬ ment du métal afin de provoquer une meilleure évacuation des gaz emprisonnés dans le métal en adaptant à chaque instant la pression à la température du métal afin d'éviter une vaporisation de certains composants, puis on peut augmenter la pression afin de résister à la pression du métal qui est maintenue dans le tube d'injection pendant la solidification du métal dans le moule afin de compenser les effets du retrait du métal dans le moule, ce qui permet d'obtenir des pièces coulées d'une grande qualité même lorsque les pièces comportent des voiles minces ou des détails très fins. L'invention permet également l'obtention de matériau composite par infiltration du métal liquide au sein d'un réseau de fibres ou de pores, cette infiltration étant facilitée par la mise en dépression de l'enceinte contenant l'élément composite.As the casting is carried out, the pressure in the enclosure 9 containing the mold can be varied. In particular, it is possible at first to lower the pressure at the start of the cooling of the metal in order to cause better evacuation of the gases trapped in the metal by constantly adapting the pressure to the temperature of the metal in order to avoid vaporization of certain components, then the pressure can be increased in order to resist the pressure of the metal which is maintained in the injection tube during the solidification of the metal in the mold in order to compensate for the effects of the withdrawal of the metal in the mold, which makes it possible to obtain high quality cast parts even when the parts comprise thin veils or very fine details. The invention also makes it possible to obtain composite material by infiltration of the liquid metal within a network of fibers or pores, this infiltration being facilitated by the depressurization of the enclosure containing the composite element.
Lorsqu'une coulée a été effectuée on effectue très aisément un remplacement de la membrane 12, le support de membrane 14 étant soumis à un échauffement tolérable.When a casting has been carried out, the membrane 12 is very easily replaced, the membrane support 14 being subjected to tolerable heating.
En outre, seule la surface du métal contenu dans le tube d'injection 10 se trouve soumis à l'atmosphère environnante pendant le changement de membrane.In addition, only the surface of the metal contained in the injection tube 10 is subjected to the surrounding atmosphere during the change of membrane.
Bien entendu, l'invention n'est pas limitée aux modes de réalisation décrits et est susceptible de varian¬ tes qui apparaîtront à l'homme de métier sans sortir du cadre de l'invention tel que défini par les revendications. En particulier on peut remplacer la membrane fusible par une vanne pouvant le cas échéant être commandée à distance avant l'ouverture de l'enceinte contenant le moule de sorte que l'atmosphère au-dessus du métal fondu ne se trouve en aucune façon perturbée. Of course, the invention is not limited to the embodiments described and is likely to vary which will appear to a person skilled in the art without departing from the scope of the invention as defined by the claims. In particular, the fusible membrane can be replaced by a valve which can, if necessary, be controlled remotely before the opening of the enclosure containing the mold, so that the atmosphere above the molten metal is in no way disturbed.
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP95907706A EP0804307A1 (en) | 1994-01-31 | 1995-01-25 | Method and device for casting molten metal in a mould |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR94/01014 | 1994-01-31 | ||
| FR9401014 | 1994-01-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1995020449A1 true WO1995020449A1 (en) | 1995-08-03 |
Family
ID=9459562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1995/000089 Ceased WO1995020449A1 (en) | 1994-01-31 | 1995-01-25 | Method and device for casting molten metal in a mould |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0804307A1 (en) |
| WO (1) | WO1995020449A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0937525A1 (en) * | 1998-02-21 | 1999-08-25 | Georg Fischer Disa AG | Low pressure casting process for light metals, particularly aluminium and apparatus for carrying out the method |
| DE19821419A1 (en) * | 1998-05-13 | 1999-11-18 | Georg Fischer Disa Ag | Process for increasing low pressure casting of metal, especially light metal |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6195760A (en) * | 1984-10-18 | 1986-05-14 | Toyota Motor Corp | Casting method and casting equipment |
| GB2204816A (en) * | 1987-05-07 | 1988-11-23 | Metal Casting Tech | Countergravity casting of metal with air exclusion |
| JPH01278949A (en) * | 1988-04-28 | 1989-11-09 | Hitachi Metals Ltd | Method and apparatus for casting |
| JPH02187247A (en) * | 1989-01-12 | 1990-07-23 | Hitachi Metals Ltd | Casting method |
| JPH02241656A (en) * | 1989-03-14 | 1990-09-26 | Hitachi Metals Ltd | Casting apparatus |
| EP0564774A1 (en) * | 1992-03-26 | 1993-10-13 | Hitachi Metals, Ltd. | Counter pressure casting and counter pressure casting device |
-
1995
- 1995-01-25 WO PCT/FR1995/000089 patent/WO1995020449A1/en not_active Ceased
- 1995-01-25 EP EP95907706A patent/EP0804307A1/en not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6195760A (en) * | 1984-10-18 | 1986-05-14 | Toyota Motor Corp | Casting method and casting equipment |
| GB2204816A (en) * | 1987-05-07 | 1988-11-23 | Metal Casting Tech | Countergravity casting of metal with air exclusion |
| JPH01278949A (en) * | 1988-04-28 | 1989-11-09 | Hitachi Metals Ltd | Method and apparatus for casting |
| JPH02187247A (en) * | 1989-01-12 | 1990-07-23 | Hitachi Metals Ltd | Casting method |
| JPH02241656A (en) * | 1989-03-14 | 1990-09-26 | Hitachi Metals Ltd | Casting apparatus |
| EP0564774A1 (en) * | 1992-03-26 | 1993-10-13 | Hitachi Metals, Ltd. | Counter pressure casting and counter pressure casting device |
Non-Patent Citations (4)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 10, no. 273 (M - 518)<2329> 17 September 1986 (1986-09-17) * |
| PATENT ABSTRACTS OF JAPAN vol. 14, no. 469 (M - 1034) 12 October 1990 (1990-10-12) * |
| PATENT ABSTRACTS OF JAPAN vol. 14, no. 52 (M - 0928) 30 January 1990 (1990-01-30) * |
| PATENT ABSTRACTS OF JAPAN vol. 14, no. 567 (M - 1059) 17 December 1990 (1990-12-17) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0937525A1 (en) * | 1998-02-21 | 1999-08-25 | Georg Fischer Disa AG | Low pressure casting process for light metals, particularly aluminium and apparatus for carrying out the method |
| DE19821419A1 (en) * | 1998-05-13 | 1999-11-18 | Georg Fischer Disa Ag | Process for increasing low pressure casting of metal, especially light metal |
| US6321825B1 (en) | 1998-05-13 | 2001-11-27 | Georg Fischer Disa Ag | Process and apparatus for the uphill low pressure casting of metal, particularly light metal |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0804307A1 (en) | 1997-11-05 |
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