EP0648563A1 - Method to cast a piece of cast iron or another metal with high melting point - Google Patents

Method to cast a piece of cast iron or another metal with high melting point Download PDF

Info

Publication number
EP0648563A1
EP0648563A1 EP94402317A EP94402317A EP0648563A1 EP 0648563 A1 EP0648563 A1 EP 0648563A1 EP 94402317 A EP94402317 A EP 94402317A EP 94402317 A EP94402317 A EP 94402317A EP 0648563 A1 EP0648563 A1 EP 0648563A1
Authority
EP
European Patent Office
Prior art keywords
metal
envelope
cast iron
cast
sheets
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
EP94402317A
Other languages
German (de)
French (fr)
Other versions
EP0648563B1 (en
Inventor
Jacques Peulve
Jean-Paul Becue
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.)
AFE ENVIRONNEMENT
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
AFE ENVIRONNEMENT
Commissariat a lEnergie Atomique CEA
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 AFE ENVIRONNEMENT, Commissariat a lEnergie Atomique CEA filed Critical AFE ENVIRONNEMENT
Publication of EP0648563A1 publication Critical patent/EP0648563A1/en
Application granted granted Critical
Publication of EP0648563B1 publication Critical patent/EP0648563B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product

Definitions

  • the present invention relates to a method for molding parts of cast iron or any other metal having a high melting temperature.
  • a first method consists in using a sand mold in which the cast iron is poured. This process is generally implemented to produce parts of a large volume requiring unit manufacturing.
  • sand is a material liable to be contaminated in contact with radioactive cast iron.
  • the cast iron parts thus molded must undergo a control of their radioactivity. This process therefore leads to a large amount of waste, the disposal of which is expensive.
  • a second method consists in using a shell mold comprising an internal shell and an external shell between which the cast iron is poured.
  • the shells are then cooled, generally by a circulation of fluids, to allow the part to be removed from the mold.
  • This process has the disadvantage of being rigid; it can therefore only be used for simple shapes and, preferably, for the production of parts in series.
  • the shells being cooled by the circulation of a fluid, risks of contact of the fluid with the molten iron are to be expected; also, such a process cannot be implemented in a nuclear installation.
  • a third molding process involves spraying the molten iron onto a rapidly rotating central shell cooled by a fluid. It is a centrifugal molding process.
  • This method has drawbacks which are substantially identical to those of the second method presented above.
  • this process presents a risk of rupture of the rotating part, the consequences of which could be considerable.
  • the implementation of such a process cannot therefore be envisaged in a nuclear installation due to its lack of reliability.
  • the subject of the present invention is precisely a process for molding cast iron parts (or of other metals with a high melting temperature) by means of collaborating forms, also called envelopes; for an application to the nuclear industry, the metal used to mold the part can be a more or less radioactive recycled metal.
  • the production of the envelope may consist in welding sheets inside which the second metal is poured.
  • the first metal is steel and the second metal is cast iron.
  • the aggregates are preferably steel balls.
  • this process allows the production of radioactive waste containers from recycled ferrous metals.
  • FIG. 1 therefore represents the collaborating formwork 1, or envelope 1, used to produce, according to the method of the invention, a container capable of receiving, for example, radioactive waste.
  • the envelope produced for the implementation of this method of the invention comprises an outer sheet 2 that is cylindrical and an inner sheet 4 that is cylindrical and concentric with the outer sheet 2.
  • the envelope can be of rectangular shape or of any other shape.
  • All the sheets 2, 4, 2b, 2a, 4a, made of a first metal, are welded together to form the envelope.
  • this first metal is steel, steel having the property of being resistant to tension and compression.
  • the sheets 2 and 4 are held in a fixed position relative to each other by means of metal inserts. According to the example of FIG. 1, the sheets 2 and 4 are held, at their upper ends, by six inserts welded on the one hand to the sheet 2 and on the other hand to the sheet 4. At the lower ends of the sheets 2 and 4, four metal inserts 8 are welded, on the one hand on the external face of the bottom 4a of the sheet 4 and on the other hand on the bottom 2a of the sheet 2.
  • the number of metal inserts holding the two sheets is, of course, given by way of example and may vary depending on the strength of the metals used and the shape of the parts to be molded.
  • the envelope may comprise only one sheet, no metal insert is then necessary.
  • this collaborating formwork, or envelope When this collaborating formwork, or envelope, is produced, it is introduced into a box 10, the bottom of which is covered with aggregates. A multitude of aggregates 12 are then deposited in the box 10, all around the envelope.
  • aggregates can also be introduced inside the envelope.
  • aggregates are introduced inside the internal sheet 4. These aggregates maintain the envelope during the introduction of the cast iron.
  • These aggregates 12 which can for example be steel balls, make it possible to prevent any deformation of the sheets 2 and 4 during the casting of the molten iron, the temperature of the sheets possibly reaching approximately 1000 C. At such a temperature , the sheets risk, in fact, deforming under the pressure of the cast iron.
  • These steel balls have a size of about 0.3 to 5 mm in diameter.
  • the aggregates 12 have, moreover, a preponderant role in the evacuation of the calories resulting from the casting of the molten iron, these aggregates having a high calorific capacity.
  • the collaborating forms may, as required, include reinforcements, inserts, reserves, notches, etc.
  • the molten iron is, in turn, introduced into the casing 1 and, in particular between the sheets 2 and 4 for the example of FIG. 1, by a few orifices 3.
  • the casting of molten iron is divided into several jets distributed over the surface of the envelope.
  • Such a distribution of the cast iron ensures a better distribution of the forces due to the pressure of the molten iron on the sheets as well as of the calories due to the high temperature of the molten iron.
  • Such an embodiment makes it possible to mold parts of small thickness using jets of molten cast iron of small diameter.
  • the casting speed of the cast iron can be adapted to allow faster solidification of the cast iron, which reduces the pressure on the sheet 4 of the casing 1 (ferrostatic pressure effect).
  • the aggregates are evacuated (by tilting or aspiration) and the molded part is recovered.
  • the walls, respectively, external of the sheet 2 and internal of the sheet 4 can be previously coated with a product. poteyage.
  • a cover can be produced, by this same process, to adapt to the container shown in FIG. 1.
  • the container shown in this figure 2 therefore comprises the casing 1 made of steel sheets collaborating with the solidified cast iron 3.
  • the steel / cast iron / sandwich steel combination has excellent strength characteristics, the cast iron having good compressive strength and the steel having good tensile and compressive strength as well as good elongation capacity allowing absorb shock. This association also constitutes good protection against radioactivity.
  • FIG. 2 also shows the groove 14 for gripping the container (of ANORA® type shell C), as well as the metal inserts 6.
  • This cover 16 of the container comprises an envelope 18 made of steel sheets collaborating with a layer of cast iron 20.
  • the cover 16 is fixed to the container by means of a screwing system.
  • This screwing system consists of several tapped holes made in the cover and in the container, inside which screws are inserted.
  • two tapped holes 22 and two screws 24 are introduced introduced into said tapped holes 22.
  • the fixing of the cover to the container can be achieved by means of a weld bead deposited between the cover and the container, this fixing also ensuring the tightness of the assembly.
  • the method of the invention can be implemented to produce all kinds of anti-radiation protections such as doors, walls, floors, etc., the thickness of which can vary from about 40 to 350 millimeters.
  • This process therefore makes it possible to produce radiation protection using the ferrous metals recycled from the nuclear industry.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Solid Wastes (AREA)
  • Arc Welding In General (AREA)

Abstract

The invention relates to a method for casting (moulding) pieces of cast iron (cast-iron castings) by means of a steel collaborating casing (envelope) (1). This method consists in: - producing a casing by means of the assembly and welding of steel sheets, - arranging granular materials (aggregates) (12) around a casing, - pouring the molten cast iron into the said casing (1), and - after cooling and solidification of the cast iron, removing the granular materials (12) in order to obtain a cast iron casting collaborating with the steel sheets. Application to the production of containers for radioactive wastes, structural elements and biological protection. <IMAGE>

Description

Domaine techniqueTechnical area

La présente invention a pour objet un procédé pour mouler des pièces en fonte ou en tout autre métal présentant une température de fusion élevée.The present invention relates to a method for molding parts of cast iron or any other metal having a high melting temperature.

Elle trouve des applications dans de nombreux domaines de l'industrie nécessitant des pièces en fonte ou en un autre métal ayant une température de fusion élevée. En particulier, elle trouve une application dans l'industrie nucléaire pour le recyclage de métaux ferreux susceptibles d'être radioactifs.It finds applications in many areas of industry requiring parts made of cast iron or another metal having a high melting temperature. In particular, it finds an application in the nuclear industry for the recycling of ferrous metals which may be radioactive.

Etat de la techniqueState of the art

De nombreux procédés de moulage de pièces en fonte sont actuellement connus.Many methods of molding cast iron parts are currently known.

Un premier procédé consiste à utiliser un moule en sable dans lequel est coulée la fonte. Ce procédé est généralement mis en oeuvre pour réaliser des pièces d'un volume important nécessitant une fabrication à l'unité. Or, le sable est un matériau susceptible d'être contaminé au contact de la fonte radioactive. Aussi, pour être utilisées dans une installation nucléaire ventilée et continuellement en dépression, les pièces en fonte ainsi moulées doivent subir un contrôle de leur radioactivité. Ce procédé conduit donc à une grande quantité de déchets dont l'élimination est onéreuse.A first method consists in using a sand mold in which the cast iron is poured. This process is generally implemented to produce parts of a large volume requiring unit manufacturing. However, sand is a material liable to be contaminated in contact with radioactive cast iron. Also, to be used in a ventilated nuclear installation and continuously under vacuum, the cast iron parts thus molded must undergo a control of their radioactivity. This process therefore leads to a large amount of waste, the disposal of which is expensive.

Un second procédé consiste à utiliser un moule en coquille comportant une coquille interne et une coquille externe entre lesquelles est coulée la fonte. Les coquilles sont ensuite refroidies, généralement par une circulation de fluides, pour permettre le démoulage de la pièce. Ce procédé a pour inconvénient d'être rigide ; il ne peut donc être mis en oeuvre que pour des forme simples et, de préférence, pour la fabrication de pièces en série. En outre, les coquilles étant refroidies par la circulation d'un fluide, des risques de contact du fluide avec la fonte en fusion sont à prévoir ; aussi, un tel procédé ne peut être mis en oeuvre dans une installation nucléaire.A second method consists in using a shell mold comprising an internal shell and an external shell between which the cast iron is poured. The shells are then cooled, generally by a circulation of fluids, to allow the part to be removed from the mold. This process has the disadvantage of being rigid; it can therefore only be used for simple shapes and, preferably, for the production of parts in series. In addition, the shells being cooled by the circulation of a fluid, risks of contact of the fluid with the molten iron are to be expected; also, such a process cannot be implemented in a nuclear installation.

Un troisième procédé de moulage consiste à projeter la fonte en fusion sur une coquille centrale tournant rapidement et refroidie par un fluide. Il s'agit d'un procédé de moulage par centrifugation. Ce procédé présente des inconvénients sensiblement identiques à ceux du second procédé présenté ci-dessus. De plus, ce procédé présente un risque de rupture de la partie tournante dont les conséquences pourraient être considérables. La mise en oeuvre d'un tel procédé ne peut donc pas être envisageable dans une installation nucléaire du fait de son manque de fiabilité.A third molding process involves spraying the molten iron onto a rapidly rotating central shell cooled by a fluid. It is a centrifugal molding process. This method has drawbacks which are substantially identical to those of the second method presented above. In addition, this process presents a risk of rupture of the rotating part, the consequences of which could be considerable. The implementation of such a process cannot therefore be envisaged in a nuclear installation due to its lack of reliability.

Par ailleurs, il est connu de mouler des pièces en plomb en utilisant des coffrages collaborants, c'est-à-dire des coffrages dont au moins une partie dudit coffrage adhère au plomb pour former la pièce désirée.Furthermore, it is known to mold lead parts using collaborating formwork, that is to say formwork of which at least part of said formwork adheres to lead to form the desired part.

Le plomb présentant un point de fusion nettement inférieur (325°C) au point de fusion de la fonte (1 200°C), ainsi que de l'acier et de bien d'autres métaux, il ne peut pas être mis en oeuvre pour réaliser des pièces en fonte ou en tout autre métal ayant une température de fusion élevée.Since lead has a significantly lower melting point (325 ° C) than the melting point of cast iron (1,200 ° C), as well as steel and many other metals, it cannot be used for make parts of cast iron or any other metal with a high melting temperature.

Exposé de l'inventionStatement of the invention

La présente invention a justement pour objet un procédé pour mouler des pièces en fonte (ou en d'autres métaux à température de fusion élevée) au moyen de coffrages collaborants, appelés aussi enveloppes ; pour une application à l'industrie nucléaire, le métal utilisé pour mouler la pièce peut être un métal recyclé plus ou moins radioactif.The subject of the present invention is precisely a process for molding cast iron parts (or of other metals with a high melting temperature) by means of collaborating forms, also called envelopes; for an application to the nuclear industry, the metal used to mold the part can be a more or less radioactive recycled metal.

De façon plus précise, ce procédé pour mouler des pièces en métaux présentant des températures de fusion élevées consiste, pour chaque pièce à mouler, à :

  • réaliser une enveloppe par assemblage de tôles en un premier métal,
  • disposer des granulats autour de cette enveloppe,
  • couler un second métal en fusion dans ladite enveloppe,
  • après refroidissement et solidification du second métal, retirer les granulats, ledit second métal solidifié collaborant avec l'enveloppe en premier métal pour réaliser la pièce.
More precisely, this process for molding metal parts having high melting temperatures consists, for each part to be molded, of:
  • make an envelope by assembling sheets of first metal,
  • dispose of the aggregates around this envelope,
  • pour a second molten metal into said envelope,
  • after cooling and solidification of the second metal, remove the aggregates, said second solidified metal collaborating with the envelope of first metal to produce the part.

Selon l'invention, la réalisation de l'enveloppe peut consister à souder des tôles à l'intérieur desquelles est coulé le second métal.According to the invention, the production of the envelope may consist in welding sheets inside which the second metal is poured.

Elle consiste en outre, à souder des inserts métalliques sur les tôles pour les maintenir en position fixe lors de la coulée du second métal.It also consists in welding metal inserts on the sheets to keep them in a fixed position during the casting of the second metal.

Selon le mode de réalisation préféré de l'invention, le premier métal est de l'acier et le second métal est de la fonte.According to the preferred embodiment of the invention, the first metal is steel and the second metal is cast iron.

Les granulats sont préférentiellement des billes d'acier.The aggregates are preferably steel balls.

Selon une application de l'invention, ce procédé permet la réalisation de conteneurs de déchets radioactifs à partir de métaux ferreux recyclés.According to an application of the invention, this process allows the production of radioactive waste containers from recycled ferrous metals.

Brève description des dessinsBrief description of the drawings

  • · la figure 1 représente une vue en perspective partiellement coupée d'un coffrage collaborant pour la mise en oeuvre du procédé selon l'invention ;· Figure 1 shows a partially cut perspective view of a formwork collaborating for the implementation of the method according to the invention;
  • · la figure 2 représente, schématiquement, une vue en coupe d'un conteneur de déchets radioactifs réalisé selon le procédé de l'invention.· Figure 2 shows, schematically, a sectional view of a radioactive waste container produced according to the method of the invention.
Exposé détaillé d'un mode de réalisationDetailed description of an embodiment

Dans la description qui va suivre, le procédé de l'invention va être décrit dans son application à la réalisation d'un conteneur en fonte. Il peut, cependant, être mis en oeuvre pour réaliser toutes sortes de pièces de formes et de poids très variés, en fonte ou en tout autre métal présentant une température de fusion élevée.In the following description, the process of the invention will be described in its application to the production of a cast iron container. It can, however, be used to produce all kinds of parts of very varied shapes and weights, made of cast iron or any other metal having a high melting temperature.

La figure 1 représente donc le coffrage collaborant 1, ou enveloppe 1, utilisé pour réaliser, selon le procédé de l'invention, un conteneur apte à recevoir, par exemple, des déchets radioactifs. L'enveloppe réalisée pour la mise en oeuvre de ce procédé de l'invention, comporte une tôle extérieure 2 cylindrique et une tôle intérieure 4 cylindrique et concentrique à la tôle extérieure 2.FIG. 1 therefore represents the collaborating formwork 1, or envelope 1, used to produce, according to the method of the invention, a container capable of receiving, for example, radioactive waste. The envelope produced for the implementation of this method of the invention comprises an outer sheet 2 that is cylindrical and an inner sheet 4 that is cylindrical and concentric with the outer sheet 2.

Selon un autre mode de réalisation de l'invention, non représenté sur la figure, l'enveloppe peut être de forme parallélépipédique ou d'une toute autre forme.According to another embodiment of the invention, not shown in the figure, the envelope can be of rectangular shape or of any other shape.

Les extrémités inférieures de ces tôles 2 et 4 sont fermées par des fonds 2a et 4a. A leurs extrémités supérieures une tôle 2b assure une fermeture de l'enveloppe. Cette tôle 2b comporte cependant des orifices 3 de remplissage.The lower ends of these sheets 2 and 4 are closed by bottoms 2a and 4a. At their upper ends a sheet 2b ensures the closure of the envelope. This sheet 2b however has filling holes 3.

Toutes les tôles 2, 4, 2b, 2a, 4a, réalisées en un premier métal, sont soudées entre elles pour former l'enveloppe.All the sheets 2, 4, 2b, 2a, 4a, made of a first metal, are welded together to form the envelope.

Selon le mode de réalisation préféré de l'invention, ce premier métal est de l'acier, l'acier ayant la propriété d'être résistant en traction et en compression.According to the preferred embodiment of the invention, this first metal is steel, steel having the property of being resistant to tension and compression.

Les tôles 2 et 4 sont maintenues dans une position fixe l'une par rapport à l'autre au moyen d'inserts métalliques. Selon l'exemple de la figure 1, les tôles 2 et 4 sont maintenues, à leurs extrémités supérieures, par six inserts soudés d'une part sur la tôle 2 et d'autre part sur la tôle 4. Aux extrémités inférieures des tôles 2 et 4, quatre inserts métalliques 8 sont soudés, d'une part sur la face extérieure du fond 4a de la tôle 4 et d'autre part sur le fond 2a de la tôle 2.The sheets 2 and 4 are held in a fixed position relative to each other by means of metal inserts. According to the example of FIG. 1, the sheets 2 and 4 are held, at their upper ends, by six inserts welded on the one hand to the sheet 2 and on the other hand to the sheet 4. At the lower ends of the sheets 2 and 4, four metal inserts 8 are welded, on the one hand on the external face of the bottom 4a of the sheet 4 and on the other hand on the bottom 2a of the sheet 2.

Le nombre d'inserts métalliques maintenant les deux tôles est, bien entendu, donné à titre d'exemple et peut varier en fonction de la résistance des métaux employés et de la forme des pièces à mouler.The number of metal inserts holding the two sheets is, of course, given by way of example and may vary depending on the strength of the metals used and the shape of the parts to be molded.

Pour des pièces à mouler de forme très simple, l'enveloppe peut ne comporter qu'une seule tôle, aucun insert métallique n'est alors nécessaire.For very simple shape molding parts, the envelope may comprise only one sheet, no metal insert is then necessary.

Lorsque ce coffrage collaborant, ou enveloppe, est réalisé, il est introduit dans un caisson 10 dont le fond est recouvert de granulats. Une multitude de granulats 12 sont ensuite déposés dans le caisson 10, tout autour de l'enveloppe.When this collaborating formwork, or envelope, is produced, it is introduced into a box 10, the bottom of which is covered with aggregates. A multitude of aggregates 12 are then deposited in the box 10, all around the envelope.

Selon la forme des pièces à mouler, des granulats peuvent être également introduits à l'intérieur de l'enveloppe. En particulier, pour l'exemple de l'enveloppe de la figure 1, des granulats sont introduits à l'intérieur de la tôle intérieure 4. Ces granulats assurent le maintien de l'enveloppe lors de l'introduction de la fonte.Depending on the shape of the parts to be molded, aggregates can also be introduced inside the envelope. In particular, for the example of the envelope of FIG. 1, aggregates are introduced inside the internal sheet 4. These aggregates maintain the envelope during the introduction of the cast iron.

Ces granulats 12, qui peuvent être par exemple des billes d'acier, permettent d'empêcher toutes déformations des tôles 2 et 4 lors de la coulée de la fonte en fusion, la température des tôles pouvant atteindre environ 1000 C. A une telle température, les tôles risquent, en effet, de se déformer sous la pression de la coulée de fonte.These aggregates 12, which can for example be steel balls, make it possible to prevent any deformation of the sheets 2 and 4 during the casting of the molten iron, the temperature of the sheets possibly reaching approximately 1000 C. At such a temperature , the sheets risk, in fact, deforming under the pressure of the cast iron.

Ces billes d'acier ont une taille d'environ 0,3 à 5 mm de diamètre.These steel balls have a size of about 0.3 to 5 mm in diameter.

Les granulats 12 ont, en outre, un rôle prépondérant dans l'évacuation des calories résultant de la coulée de la fonte en fusion, ces granulats ayant une forte capacité calorifique.The aggregates 12 have, moreover, a preponderant role in the evacuation of the calories resulting from the casting of the molten iron, these aggregates having a high calorific capacity.

En outre, les coffrages collaborants, du type décrit précédemment, peuvent, selon les besoins, comporter des renforts, des inserts, des réserves, des encoches, etc.In addition, the collaborating forms, of the type described above, may, as required, include reinforcements, inserts, reserves, notches, etc.

Lorsque les granulats ont été introduits, la fonte en fusion est, à son tour, introduite dans l'enveloppe 1 et, en particulier entre les tôles 2 et 4 pour l'exemple de la figure 1, par quelques orifices 3.When the aggregates have been introduced, the molten iron is, in turn, introduced into the casing 1 and, in particular between the sheets 2 and 4 for the example of FIG. 1, by a few orifices 3.

Selon un mode de réalisation du procédé, la coulée de fonte en fusion est divisée en plusieurs jets répartis à la surface de l'enveloppe. Une telle distribution de la coulée de fonte assure une meilleure répartition des efforts dus à la pression de la fonte en fusion sur les tôles ainsi que des calories dues à la forte température de la fonte en fusion.According to one embodiment of the method, the casting of molten iron is divided into several jets distributed over the surface of the envelope. Such a distribution of the cast iron ensures a better distribution of the forces due to the pressure of the molten iron on the sheets as well as of the calories due to the high temperature of the molten iron.

Un tel mode de réalisation permet de mouler des pièces de faible épaisseur en utilisant des jets de fonte en fusion de faible diamètre.Such an embodiment makes it possible to mold parts of small thickness using jets of molten cast iron of small diameter.

En outre, la vitesse de coulée de la fonte peut être adaptée afin de permettre une solidification plus rapide de la fonte, ce qui réduit la pression subie par la tôle 4 de l'enveloppe 1 (effet de pression ferrostatique).In addition, the casting speed of the cast iron can be adapted to allow faster solidification of the cast iron, which reduces the pressure on the sheet 4 of the casing 1 (ferrostatic pressure effect).

Lorsque la fonte ainsi coulée est refroidie, les granulats sont évacués (par basculement ou aspiration) et la pièce moulée est récupérée.When the cast iron thus cast is cooled, the aggregates are evacuated (by tilting or aspiration) and the molded part is recovered.

Afin de permettre une évacuation plus aisée des granulats 12, et donc de limiter les risques de collage des granulats contre l'enveloppe, les parois, respectivement, externe de la tôle 2 et interne de la tôle 4 peuvent être préalablement enduites d'un produit de poteyage.In order to allow an easier evacuation of the aggregates 12, and therefore to limit the risks of sticking of the aggregates against the envelope, the walls, respectively, external of the sheet 2 and internal of the sheet 4 can be previously coated with a product. poteyage.

On a décrit précédemment la réalisation, selon le procédé de l'invention, d'un conteneur en fonte. Un couvercle peut être réalisé, par ce même procédé, pour s'adapter sur le conteneur montré sur la figure 1.We have previously described the production, according to the method of the invention, of a cast iron container. A cover can be produced, by this same process, to adapt to the container shown in FIG. 1.

Sur la figure 2, on a représenté, en coupe, le conteneur de la figure 1, avec son couvercle, obtenu par le procédé de l'invention.In Figure 2, there is shown, in section, the container of Figure 1, with its cover, obtained by the method of the invention.

Les références, portées sur cette figure 2, qui sont identiques aux références de la figure 1 représentent des éléments identiques.The references, given in this FIG. 2, which are identical to the references in FIG. 1, represent identical elements.

Le conteneur représenté sur cette figure 2 comporte donc l'enveloppe 1 en tôles d'acier collaborant avec la fonte 3 solidifiée. L'association acier/fonte/acier en "sandwich" présente des caractéristiques de résistance excellentes, la fonte ayant une bonne résistance en compression et l'acier ayant une bonne résistance en traction et en compression ainsi qu'une bonne capacité d'allongement permettant d'absorber les chocs. Cette association constitue, en outre, une bonne protection contre la radioactivité.The container shown in this figure 2 therefore comprises the casing 1 made of steel sheets collaborating with the solidified cast iron 3. The steel / cast iron / sandwich steel combination has excellent strength characteristics, the cast iron having good compressive strength and the steel having good tensile and compressive strength as well as good elongation capacity allowing absorb shock. This association also constitutes good protection against radioactivity.

On a également représenté sur la figure 2 la rainure 14 de préhension du conteneur (de type ANORA® coque C), ainsi que les inserts métalliques 6.FIG. 2 also shows the groove 14 for gripping the container (of ANORA® type shell C), as well as the metal inserts 6.

En outre, on a représenté le couvercle 16 du conteneur. Ce couvercle comporte une enveloppe 18 en tôles d'acier collaborant avec une couche de fonte 20.In addition, there is shown the cover 16 of the container. This cover comprises an envelope 18 made of steel sheets collaborating with a layer of cast iron 20.

Selon l'exemple représenté sur cette figure 2, le couvercle 16 est fixé sur le conteneur au moyen d'un système de vissage. Ce système de vissage consiste en plusieurs trous taraudés réalisés dans le couvercle et dans le conteneur, à l'intérieur desquels sont introduites des vis. Sur la figure 2, on a représenté deux trous taraudés 22 et deux vis 24 introduites dans lesdits trous taraudés 22.According to the example shown in this figure 2, the cover 16 is fixed to the container by means of a screwing system. This screwing system consists of several tapped holes made in the cover and in the container, inside which screws are inserted. In FIG. 2, two tapped holes 22 and two screws 24 are introduced introduced into said tapped holes 22.

Selon un autre exemple, la fixation du couvercle sur le conteneur peut être réalisé au moyen d'un cordon de soudure déposé entre le couvercle et le conteneur, cette fixation assurant en outre l'étanchéité de l'ensemble.According to another example, the fixing of the cover to the container can be achieved by means of a weld bead deposited between the cover and the container, this fixing also ensuring the tightness of the assembly.

Outre l'application au conteneur de déchets radioactifs, le procédé de l'invention peut être mis en oeuvre pour réaliser toutes sortes de protections anti-rayonnements telles que des portes, des murs, des sols, etc., dont l'épaisseur peut varier d'environ 40 à 350 millimètres.In addition to the application to the container of radioactive waste, the method of the invention can be implemented to produce all kinds of anti-radiation protections such as doors, walls, floors, etc., the thickness of which can vary from about 40 to 350 millimeters.

Ce procédé permet donc de réaliser des protections contre les rayonnements en utilisant les métaux ferreux recyclés de l'industrie nucléaire.This process therefore makes it possible to produce radiation protection using the ferrous metals recycled from the nuclear industry.

Claims (7)

Procédé pour mouler des pièces en métaux présentant des températures de fusion élevées, caractérisé en ce qu'il consiste, pour chaque pièce à mouler, à : - réaliser un coffrage collaborant, ou enveloppe, (1) par assemblage de tôles en un premier métal, - disposer des granulats (12) autour de l'enveloppe, - couler un second métal (3) en fusion dans ladite enveloppe, - après refroidissement et solidification du second métal, retirer les granulats, ledit second métal solidifié collaborant avec l'enveloppe en premier métal pour réaliser la pièce. Method for molding metal parts with high melting temperatures, characterized in that it consists, for each part to be molded, in: - make a collaborating formwork, or envelope, (1) by assembling sheets of a first metal, - dispose of the aggregates (12) around the envelope, - casting a second molten metal (3) in said envelope, - After cooling and solidification of the second metal, remove the aggregates, said second solidified metal collaborating with the envelope of first metal to produce the part. Procédé selon la revendication 1, caractérisé en ce que la réalisation de l'enveloppe consiste à souder des tôles à l'intérieur desquelles est coulé le second métal.Method according to claim 1, characterized in that the production of the envelope consists of welding sheets inside which the second metal is cast. Procédé selon la revendication 2, caractérisé en ce que la réalisation de l'enveloppe consiste en outre à souder des inserts métalliques (6, 8) sur certaines tôles pour maintenir en position fixe lesdites tôles l'une par rapport aux autres.A method according to claim 2, characterized in that the production of the envelope further consists in welding metal inserts (6, 8) on certain sheets to maintain said sheets in a fixed position relative to each other. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le premier métal est de l'acier.Process according to any one of Claims 1 to 3, characterized in that the first metal is steel. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le second métal est de la fonte.Method according to any one of claims 1 to 4, characterized in that the second metal is cast iron. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que les granulats sont des billes d'acier.Process according to any one of Claims 1 to 5, characterized in that the aggregates are steel balls. Procédé pour mouler des conteneurs de déchets radioactifs, caractérisé en ce qu'il consiste en un procédé selon l'une quelconque des revendications 1 à 6.Method for molding radioactive waste containers, characterized in that it consists into a method according to any one of claims 1 to 6.
EP19940402317 1993-10-19 1994-10-17 Method to cast a piece of cast iron or another metal with high melting point Expired - Lifetime EP0648563B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9312440A FR2711329B1 (en) 1993-10-19 1993-10-19 Process for molding cast iron or other metal parts with a high melting temperature.
FR9312440 1993-10-19

Publications (2)

Publication Number Publication Date
EP0648563A1 true EP0648563A1 (en) 1995-04-19
EP0648563B1 EP0648563B1 (en) 1998-04-29

Family

ID=9451985

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940402317 Expired - Lifetime EP0648563B1 (en) 1993-10-19 1994-10-17 Method to cast a piece of cast iron or another metal with high melting point

Country Status (5)

Country Link
EP (1) EP0648563B1 (en)
CA (1) CA2118291A1 (en)
DE (1) DE69409905T2 (en)
ES (1) ES2117772T3 (en)
FR (1) FR2711329B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2468887C1 (en) * 2011-07-26 2012-12-10 Открытое акционерное общество "Чепецкий механический завод" (ОАО ЧМЗ) Safety device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2739074A1 (en) * 1976-09-01 1978-03-02 Saurer Ag Adolph HEAD SOUND ABSORBING CASTING PART, PROCESS OF MANUFACTURING THEREOF AND ITS USE
JPS5993851A (en) * 1982-11-19 1984-05-30 Kobe Steel Ltd Sintered b4c-cu plate for cast coating
DE3324929A1 (en) * 1983-07-09 1985-01-17 Buderus Ag, 6330 Wetzlar Process for the production of a thick-walled container base of high notch toughness

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2739074A1 (en) * 1976-09-01 1978-03-02 Saurer Ag Adolph HEAD SOUND ABSORBING CASTING PART, PROCESS OF MANUFACTURING THEREOF AND ITS USE
JPS5993851A (en) * 1982-11-19 1984-05-30 Kobe Steel Ltd Sintered b4c-cu plate for cast coating
DE3324929A1 (en) * 1983-07-09 1985-01-17 Buderus Ag, 6330 Wetzlar Process for the production of a thick-walled container base of high notch toughness

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 8, no. 205 (C - 243) 19 September 1984 (1984-09-19) *

Also Published As

Publication number Publication date
ES2117772T3 (en) 1998-08-16
EP0648563B1 (en) 1998-04-29
DE69409905T2 (en) 1998-10-22
FR2711329B1 (en) 1995-12-22
CA2118291A1 (en) 1995-04-20
FR2711329A1 (en) 1995-04-28
DE69409905D1 (en) 1998-06-04

Similar Documents

Publication Publication Date Title
EP0373997B1 (en) Container for storing radioactive waste
EP0715946B1 (en) Device for producing an optical lens from synthetic polymerisable material
EP1166279A1 (en) Installation for very long term storage of heat-generating products such as nuclear waste
FR2626508A1 (en) CASTING MOLD OF METALS, EQUIPPED WITH A SLEEVE CONTAINING A FILTER
WO2011121251A1 (en) Method and device for manufacturing a bi-material ferrule and ferrule thus produced
FR2495817A1 (en) CONTAINER FOR STORING AND TRANSPORTING AT LEAST ONE SHELL FILLED WITH RADIO-ACTIVE WASTE INCORPORATED IN FADE GLASS
FR2745509A1 (en) PROCESS FOR THE MANUFACTURE OF A TIPPER BODY WITH CONCAVE PROFILE
EP2320429A1 (en) Packaging for transporting and/or storing radioactive materials including radially stacked radiation protection elements
FR3073827A1 (en) DEVICE FOR SEALING THE BOTTOM OR COVER OF AN ECOLOGICALLY DESIGNED CARDBOARD PACKAGING USING AN EXTENSIBLE SUPPORTING ELEMENT
FR2732155A1 (en) COMPRESSION MOLD DEVICE FOR MANUFACTURING A COMPOSITE INSULATOR
EP0648563B1 (en) Method to cast a piece of cast iron or another metal with high melting point
FR2792392A1 (en) Protecting device for bottle, reservoir, etc., made of composite material and carrying fluid under pressure, comprises outer shell and compressible material placed at end of container
FR2473213A1 (en) Drum for long term storage of radioactive or toxic wastes - has continuous sealed inner lining of thermosetting resin
EP2700077B1 (en) Thermally conductive element enabling an improvement in the manufacture of packaging for the transport and/or storage of radioactive material
CA2742862A1 (en) Ladle pipe for liquid metal casting plant
EP0586314B1 (en) Method of making pieces of casting alloys with reinforced parts
FR2772662A1 (en) Force distribution insert
FR2629838A1 (en) METHOD AND APPARATUS FOR INTRODUCING FLUID MATERIAL IN A MOLTEN METAL BATH
EP2490842A1 (en) Method for manufacturing a metal ingot comprising a bore, and associated ingot and molding device
EP1133372B1 (en) Tilting tank for processing liquid metal and device for sealed connection with fixed chute
WO1997037792A1 (en) Ingot mould for the continuous vertical casting of metals
FR2686418A1 (en) APPARATUS FOR SAMPLING A SOLIDIFIED BODY IN A RESERVOIR.
FR2550652A1 (en) Container assembly for storing hot radioactive wastes
FR2886710A1 (en) Molded hollow concrete unit e.g. septic tank, has lateral walls with one wall comprising opening that is sealed by removable rigid gate which maintains shape and position of joint and protects lip of joint
WO2005097376A2 (en) Mould for casting a liquid metal and associated method

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): BE CH DE ES GB LI SE

17P Request for examination filed

Effective date: 19950921

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 19970731

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE ES GB LI SE

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69409905

Country of ref document: DE

Date of ref document: 19980604

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19980716

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2117772

Country of ref document: ES

Kind code of ref document: T3

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: BE

Payment date: 19991008

Year of fee payment: 6

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

Ref country code: ES

Payment date: 19991025

Year of fee payment: 6

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

Ref country code: CH

Payment date: 19991026

Year of fee payment: 6

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

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001018

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

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001031

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001031

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001031

BERE Be: lapsed

Owner name: AFE ENVIRONNEMENT

Effective date: 20001031

Owner name: COMMISSARIAT A L'ENERGIE ATOMIQUE

Effective date: 20001031

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20011113

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

Ref country code: SE

Payment date: 20131015

Year of fee payment: 20

Ref country code: GB

Payment date: 20131010

Year of fee payment: 20

Ref country code: DE

Payment date: 20131004

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 69409905

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 69409905

Country of ref document: DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20141016

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

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

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20141016