EP2540415B1 - Isostatic press mould and method for manufacturing a foundry core from such a mould - Google Patents

Isostatic press mould and method for manufacturing a foundry core from such a mould Download PDF

Info

Publication number
EP2540415B1
EP2540415B1 EP12305746.5A EP12305746A EP2540415B1 EP 2540415 B1 EP2540415 B1 EP 2540415B1 EP 12305746 A EP12305746 A EP 12305746A EP 2540415 B1 EP2540415 B1 EP 2540415B1
Authority
EP
European Patent Office
Prior art keywords
mold
parts
core
plug
isostatic
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.)
Not-in-force
Application number
EP12305746.5A
Other languages
German (de)
French (fr)
Other versions
EP2540415A1 (en
Inventor
Romain Epale
Véronique BOUVIER
Patrick Blandenet
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.)
Saint Jean Industries SAS
Original Assignee
Saint Jean Industries SAS
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 Saint Jean Industries SAS filed Critical Saint Jean Industries SAS
Publication of EP2540415A1 publication Critical patent/EP2540415A1/en
Application granted granted Critical
Publication of EP2540415B1 publication Critical patent/EP2540415B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/06—Core boxes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/001—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a flexible element, e.g. diaphragm, urged by fluid pressure; Isostatic presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/022—Moulds for compacting material in powder, granular of pasta form
    • B30B15/024—Moulds for compacting material in powder, granular of pasta form using elastic mould parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B22F3/03—Press-moulding apparatus therefor

Definitions

  • the invention relates to the technical sector of shaping powders, and that of isostatic compaction and more particularly the molds used in the implementation of isostatic compression process.
  • the isostatic compression process is a known method which is carried out in presses which comprise an enclosure obtained from rolls machined in a forged steel. These speakers are closed by a screw cap or a frame called “mesh”. Once the chamber is closed, a pump injects a liquid until the desired isostatic pressure is reached.
  • the molds used are monoblocs, called “socks” or “bladders” and comprise two elements, a cap and a container. It is possible to achieve by this process parts with significant undercuts but this requires the destruction of the molds to remove the piece. This therefore substantially limits the use of this method because each time, a new mold is necessary to achieve.
  • the core is salt formed by isostatic compaction in a urethane or elastomer bag.
  • the Applicant has worked not only on the design of the mold itself, but also on the constituent material of the part to be obtained, which may be a foundry core with the mold according to the invention, according to the subsequent uses envisaged.
  • the mold allowing the treatment of a powder material by isostatic compaction to obtain a final product, said mold being made of an elastomeric material having a shape memory, is remarkable in said mold is made in two internally profiled parts to correspond to the shapes of the workpiece to be defined defining a foundry core, said parts each comprising a half-sectioned neck which when said parts are assembled form a chute for introducing the material to compact, said parts to be assembled having a peripheral joint plane, a cap of elastomeric material ensuring the sealing of said mold thus obtained and the holding of said parts to be joined together, the mold closed the peripheral contact surfaces of said mold parts form the plane of joints, said mold after formation of the core of founding ie is of greater internal volume than the volume of said core thus released, the release of said core being carried out in the demolding direction, characterized in that the parts and their lip joint plane are assembled with a tenon arranged on any the perimeter of the joint planes up to the stopper.
  • the mold is referenced as a whole by (1). It comprises two parts (1a) and (1b) which have complementary shapes to be assembled to seal. These parts are internally profiled to match the shapes of the part (2) to be compact including a foundry core. They have a neck (1c) half-part which when the two parts are assembled form a chute for introducing the material to be compacted. They also essentially present a plane of peripheral joints (1d).
  • This material is, according to the invention, introduced in the form of powder and for example in particular salt.
  • the mold in its two parts (la) (1b) and the plug (3) are made of an elastomer material, especially polyurethane, having a certain flexibility of shape to be deformed, thus having a shape memory while ensuring the mold obtained a certain rigidity.
  • the mold thus produced is used in an isostatic compression process for the conversion of the powder material contained in a rigid compact piece or compact core.
  • the configuration of a mold is divided into two parts with a plane of joints made of an elastomer material, in particular polyurethane, having a deformation capacity, with the choice of a material in the form of a powder capable of constitute the part to be obtained, and by introducing this set in the isostatic compression press to ensure the manufacture of the part to obtain or core.
  • the constitution of the mold of elastomeric material having a shape memory capacity and deformation by resuming its original shape allows to unmold the piece or core and the removal of the part or core obtained without breakage and without having to destroy, cut or tear the mold .
  • the configuration of the two-part mold with peripheral joint plane provides a considerable advantage by making it possible to produce cores with non-regular complex shapes in shapes, in dimensions, in volumes, without any risk of deterioration of the core.
  • the dimensional negative to be formed allows the mold to be demolded in a demolding direction.
  • the solution according to the invention makes it possible to reuse the mold since it returns to its original shape when the isostatic pressure has been eliminated, and the mold is spread laterally in two half-parts on either side of the core obtained without there is degradation of the latter.
  • This method, and the mold in particular make it possible to obtain parts or cores having complex shapes and very large undercuts.
  • the constituent parts (la) (1b) of the mold may have more or less important thicknesses of the order, for example from 3 to 20 mm, forming a deformable skin around the part to be compacted.
  • connection of the parts (la) (1b) of the mold with the peripheral joint plane is carried out in any suitable manner by male-female assembly for example to be easily disassembled to extract the piece or compacted core obtained. It can also be envisaged that said parts (1a) (1b) form a joint plane defining a lip allowing their assembly with a pin (4) placed on this lip and disposed over the entire perimeter of the joint planes defined by the assembly. parts (la) (1b) to the cap (3) to ensure complete sealing.
  • the advantages are apparent from the invention and in particular it emphasizes the non-destruction of the mold and its reuse. There is therefore a substantial economy of material.
  • the invention also allows the production of a mold for compacting parts having a large variety of shapes and may include undercuts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)

Description

L'invention se rattache au secteur technique de la mise en forme des poudres, et celui de la compaction isostatique et plus particulièrement des moules utilisés dans la mise en oeuvre de procédé de compression isostatique.The invention relates to the technical sector of shaping powders, and that of isostatic compaction and more particularly the molds used in the implementation of isostatic compression process.

A ce jour le procédé de compression isostatique est un procédé connu qui s'effectue dans des presses qui comportent une enceinte obtenue à partir de cylindres usinés dans un acier forgé. Ces enceintes sont fermées par un bouchon fileté ou par un cadre appelé "maille". Une fois l'enceinte fermée, une pompe injecte un liquide jusqu'à atteindre la pression isostatique souhaitée. Les moules utilisés sont monoblocs, dénommés "chaussettes" ou "vessies" et comportent deux éléments, un bouchon et un conteneur. On peut réaliser par ce procédé des pièces avec des contre-dépouilles importantes mais cela requiert la destruction des moules pour retirer la pièce. Cela limite donc d'une manière substantielle l'utilisation de ce procédé car à chaque fois, un nouveau moule est nécessaire à réaliser.At present, the isostatic compression process is a known method which is carried out in presses which comprise an enclosure obtained from rolls machined in a forged steel. These speakers are closed by a screw cap or a frame called "mesh". Once the chamber is closed, a pump injects a liquid until the desired isostatic pressure is reached. The molds used are monoblocs, called "socks" or "bladders" and comprise two elements, a cap and a container. It is possible to achieve by this process parts with significant undercuts but this requires the destruction of the molds to remove the piece. This therefore substantially limits the use of this method because each time, a new mold is necessary to achieve.

On connaît par le brevet JP 09-241704 un procédé par compression isostatique qui permet la transformation d'une poudre de matériau en une pièce finale de dimension plus réduite et ferme. Cependant, la mise en forme de ce procédé exige l'utilisation d'une gaine supplémentaire de lubrification qui doit être détruite après enlèvement de la pièce obtenue, ceci avec tous les risques inhérents à cet enlèvement et dans la détérioration de la pièce finale obtenue. En outre, les formes du moule sont toujours simples géométriquement avec par exemple trois blocs et un bouchon ou un susceptibles de se rapprocher ou de s'éloigner lors de la compaction isostatique. Il est prévu aussi dans ce document une forme de moule en une seule pièce rectangulaire et creuse qui requiert que la réduction dimensionnelle de la pièce obtenue soit suffisamment importante pour être enlevée par extraction par le haut. Cette dernière mise en oeuvre reste complexe et des risques de détérioration de la pièce par accrochage sont réels.We know by the patent JP 09-241704 an isostatic compression process which allows the transformation of a powder of material into a final piece of smaller and firm size. However, the shaping of this process requires the use of an additional liner which must be destroyed after removal of the part obtained, with all the risks inherent in this removal and in the deterioration of the final part obtained. In addition, the shapes of the mold are always simple geometrically with for example three blocks and a plug or a likely to move closer or farther away during isostatic compaction. Also provided in this document is a hollow, rectangular one-piece mold form which requires that the dimensional reduction of the resulting part be large enough to be removed by top extraction. This last implementation remains complex and risks of deterioration of the part by hanging are real.

On connait de la demande WO 85/04605 un autre procédé de fabrication d'un noyau de fonderie à base de poudre. Le noyau est en sel formé par compaction isostatique dans un sac en uréthane ou en élastomère.We know the demand WO 85/04605 another method of manufacturing a powder-based foundry core. The core is salt formed by isostatic compaction in a urethane or elastomer bag.

Il est connu aussi de réaliser des moules uniques monoblocs dans un matériau en caoutchouc aux formes finales du produit à obtenir. La poudre de matériau est insérée dans le moule considéré. Puis après l'opération de compaction isostatique, il est nécessaire d'enlever le produit obtenu. En pratique, l'enlèvement du produit obtenu est très délicat, nécessite souvent l'usage d'outils pour écarter élastiquement le moule et le détacher du produit obtenu. L'enlèvement de ce dernier reste très empirique quand il ne faut pas inciser et couper le moule avec un outil coupant (ciseau, couteau) pour dégager le produit obtenu. Ceci est sans compter avec la détérioration potentielle du produit obtenu. Qui dit détérioration et défectuosité entraînent une mise au rebut du produit.It is also known to produce single-piece molds in a rubber material with the final shapes of the product to be obtained. The powder of material is inserted in the considered mold. Then after the isostatic compaction operation, it is necessary to remove the product obtained. In practice, the removal of the product obtained is very delicate, often requires the use of tools to elastically separate the mold and detach the product obtained. The removal of the latter is very empirical when it is not necessary to incise and cut the mold with a cutting tool (chisel, knife) to clear the product obtained. This is not counting with the potential deterioration of the product obtained. Damage and defects result in product scrapping.

La démarche du Demandeur a donc été d'examiner la conception d'un moule différent permettant d'une part sa réutilisation et permettant également de traiter des pièces ayant des contre-dépouilles très importantes avec une plus grande diversité de formes à obtenir.The Applicant's approach was therefore to examine the design of a different mold on the one hand for its reuse and also to treat parts with very large undercuts with a greater variety of forms to obtain.

Ainsi le Demandeur a travaillé non seulement sur la conception du moule en lui-même, mais aussi sur le matériau constitutif de la pièce à obtenir pouvant être un noyau de fonderie avec le moule selon l'invention, selon les utilisations ultérieures envisagées.Thus, the Applicant has worked not only on the design of the mold itself, but also on the constituent material of the part to be obtained, which may be a foundry core with the mold according to the invention, according to the subsequent uses envisaged.

Selon une première caractéristique de l'invention, le moule permettant le traitement d'un matériau en poudre par compaction isostatique pour l'obtention d'un produit final, ledit moule étant constitué en un matériau élastomère ayant une mémoire de forme, est remarquable en ce que ledit moule est réalisé en deux parties profilées intérieurement pour correspondre aux formes de la pièce à compacter définissant un noyau de fonderie, lesdites parties comprenant chacune un col en demi-parties qui lorsque lesdites parties sont assemblées forment une goulotte d'introduction du matériau à compacter, lesdites parties à assembler présentant un plan de joints périphérique, un bouchon en matériau élastomère assurant la fermeture étanche dudit moule ainsi obtenu et le maintien desdites parties à assembler entre elles, le moule fermé les surfaces périphériques de contact desdites parties de moule forment le plan de joints, ledit moule après formation du noyau de fonderie est d'un volume intérieur plus important que le volume dudit noyau ainsi dégagé, le démoulage dudit noyau étant effectué dans la direction de démoulage, caractérisé en ce que les parties et leur plan de joints formant lèvre sont assemblées avec un tenon disposé sur tout le périmètre des plans de joints jusqu'au bouchon.According to a first characteristic of the invention, the mold allowing the treatment of a powder material by isostatic compaction to obtain a final product, said mold being made of an elastomeric material having a shape memory, is remarkable in said mold is made in two internally profiled parts to correspond to the shapes of the workpiece to be defined defining a foundry core, said parts each comprising a half-sectioned neck which when said parts are assembled form a chute for introducing the material to compact, said parts to be assembled having a peripheral joint plane, a cap of elastomeric material ensuring the sealing of said mold thus obtained and the holding of said parts to be joined together, the mold closed the peripheral contact surfaces of said mold parts form the plane of joints, said mold after formation of the core of founding ie is of greater internal volume than the volume of said core thus released, the release of said core being carried out in the demolding direction, characterized in that the parts and their lip joint plane are assembled with a tenon arranged on any the perimeter of the joint planes up to the stopper.

Selon une autre caractéristique de l'invention, le procédé de fabrication d'un noyau de fonderie en un matériau à base de poudre mettant en oeuvre les caractéristiques d'un moule selon la revendication précédente, est remarquable en ce qu'il met en oeuvre les opérations suivantes :

  • réalisation d'un moule en deux parties en matériau élastomère complémentaires présentant des formes intérieures correspondant à celles du noyau à obtenir avec une partie format demi-col et un plan de joints périphérique,
  • assemblage des parties constitutives du moule avec leur surface périphérique constituant des plans de joints en contact l'une contre l'autre,
  • introduction et remplissage de la poudre dans le volume intérieur défini par l'assemblage des deux parties de moule,
  • fermeture du moule autour du col obtenu par un bouchon en matériau élastomère, ledit bouchon assurant une fonction complémentaire de tenue et de maintien desdites deux parties de moules,
  • introduction du moule rempli dans la presse à compaction isostatique
  • opération de compression isostatique entraînant une déformation volumétrique du moule par une réduction de son volume et simultanément un compactage de la poudre pour constituer la pièce ou noyau,
  • après compactage de la pièce, intervention et suppression de la pression isostatique pour supprimer la fonction 'compression isostatique' entraînant la remise en forme initiale du moule grâce à sa mémoire de forme et dégagement du moule par rapport à la pièce ou noyau réalisé,
  • démoulage du moule avec enlèvement du bouchon et ouverture desdites parties de moule par écartement dans une direction de démoulage et suppression de leur plan de joints,
  • enlèvement du noyau de fonderie réalisé.
According to another characteristic of the invention, the process for manufacturing a foundry core made of a powder-based material using the characteristics of a mold according to the preceding claim, is remarkable in that it implements the following operations:
  • producing a two-part mold made of complementary elastomer material having inner shapes corresponding to those of the core to be obtained with a half-neck portion and a peripheral joint plane,
  • assembling the constituent parts of the mold with their peripheral surface constituting joint planes in contact with each other,
  • introduction and filling of the powder in the interior volume defined by the assembly of the two mold parts,
  • closure of the mold around the neck obtained by a plug of elastomeric material, said plug providing a complementary function of holding and holding said two parts of molds,
  • introduction of the filled mold into the isostatic compaction press
  • isostatic compression operation causing a volumetric deformation of the mold by reducing its volume and simultaneously compaction of the powder to form the part or core,
  • after compaction of the part, intervention and suppression of the isostatic pressure to eliminate the 'isostatic compression' function resulting in the initial shaping of the mold by virtue of its shape memory and release of the mold with respect to the part or core produced,
  • demolding the mold with removal of the plug and opening of said mold parts by spacing in a demolding direction and removal of their joint plane,
  • removal of the foundry core.

Ces caractéristiques et d'autre encore ressortiront bien de la suite de la description.These and other characteristics will be apparent from the rest of the description.

Pour fixer l'objet de l'invention illustré d'une manière non limitative aux figures des dessins, où :

  • La figure 1 est une vue avant assemblage du moule et de ses parties constitutives,
  • La figure 2 est une vue du moule assemblé avant positionnement de son bouchon,
  • La figure 3 est une vue à titre d'exemple non limitatif d'une pièce ou noyau compacté par pression isostatique après démoulage.
  • Les figures 4 à 7 sont des vues à caractère schématique illustrant successivement l'introduction du moule dans la presse isostatique, l'exercice de la pression isostatique avec déformation du moule, la suppression de la pression isostatique avec retour en forme initiale du moule de par sa mémoire de forme, et enlèvement du noyau.
For fixing the object of the invention illustrated in a nonlimiting manner to the figures of the drawings, where:
  • The figure 1 is a view before assembly of the mold and its constituent parts,
  • The figure 2 is a view of the assembled mold before positioning its cap,
  • The figure 3 is a view by way of non-limiting example of a part or core compacted by isostatic pressure after demolding.
  • The Figures 4 to 7 are schematic views illustrating successively the introduction of the mold into the isostatic press, the exertion of the isostatic pressure with deformation of the mold, the suppression of the isostatic pressure with return to initial shape of the mold by its shape memory, and removal of the nucleus.

Afin de rendre plus concret l'objet de l'invention, on le décrit maintenant d'une manière non limitative illustrée aux figures des dessins.In order to make the object of the invention more concrete, it is now described in a nonlimiting manner illustrated in the figures of the drawings.

Le moule, selon l'invention, est référencé dans son ensemble par (1).
Il comprend deux parties (la) et (1b) qui ont des formes complémentaires pour être assemblées à étanchéité. Ces parties sont profilées intérieurement pour correspondre aux formes de la pièce (2) à compacter notamment un noyau de fonderie. Elles présentent un col (1c) en demi-partie qui lorsque les deux parties sont assemblées forment une goulotte d'introduction du matériau à compacter. Elles présentent également de manière essentielle un plan de joints périphériques (1d). Ce matériau est, selon l'invention, introduit en forme de poudre et par exemple notamment en sel. Lorsque le matériau remplit l'ensemble du volume intérieur formé et délimité par l'assemblage des deux parties (la) et (1b) par leur plan de joints (1d) est disposé ensuite un bouchon (3) qui assure la fermeture étanche du dit moule ainsi obtenu et l'assemblage desdites parties (la) (1b). Le moule fermé, les surfaces périphériques desdites parties du moule forment le plan de joints (1d). Selon l'invention, le moule dans ses deux parties (la) (1b) et le bouchon (3) sont réalisés en un matériau élastomère, notamment polyuréthane, ayant une certaine souplesse de forme pour pouvoir être déformé, ayant ainsi une mémoire de forme, tout en assurant au moule obtenu une certaine rigidité.The mold, according to the invention, is referenced as a whole by (1).
It comprises two parts (1a) and (1b) which have complementary shapes to be assembled to seal. These parts are internally profiled to match the shapes of the part (2) to be compact including a foundry core. They have a neck (1c) half-part which when the two parts are assembled form a chute for introducing the material to be compacted. They also essentially present a plane of peripheral joints (1d). This material is, according to the invention, introduced in the form of powder and for example in particular salt. When the material fills the entire interior volume formed and delimited by the assembly of the two parts (la) and (1b) by their joint plane (1d) is then disposed a plug (3) which ensures the sealing of said mold thus obtained and the assembly of said parts (la) (1b). The closed mold, the peripheral surfaces of said mold parts form the joint plane (1d). According to the invention, the mold in its two parts (la) (1b) and the plug (3) are made of an elastomer material, especially polyurethane, having a certain flexibility of shape to be deformed, thus having a shape memory while ensuring the mold obtained a certain rigidity.

Le moule ainsi réalisé est mis en oeuvre dans un procédé de compression isostatique en vue de la transformation du matériau en poudre contenu en une pièce ou noyau compacté rigide et monobloc.The mold thus produced is used in an isostatic compression process for the conversion of the powder material contained in a rigid compact piece or compact core.

Le procédé de mise en oeuvre est alors le suivant :

  • réalisation d'un moule en deux parties complémentaires présentant des formes intérieures correspondant à celles du noyau à obtenir avec une partie format demi-col et un plan de joints périphérique,
  • assemblage des parties constitutives du moule avec leur surface périphérique constituant des plans de joint en contact l'une contre l'autre,
  • introduction et remplissage de la poudre dans le volume intérieur défini par l'assemblage des deux parties de moule,
  • fermeture du moule autour du col obtenu par un bouchon, ledit bouchon assurant une fonction complémentaire de tenue et de maintien desdites deux parties de moule,
  • introduction du moule rempli dans la presse à compaction isostatique
  • opération de compression isostatique entraînant une déformation volumétrique du moule par une réduction de son volume et simultanément un compactage de la poudre pour constituer la pièce ou noyau,
  • après compactage de la pièce, intervention et suppression de la pression isostatique pour supprimer la fonction 'compression isostatique' entraînant la remise en forme initiale du moule grâce à sa mémoire de forme et dégagement du moule par rapport à la pièce ou noyau réalisé,
  • démoulage du moule avec enlèvement du bouchon et ouverture desdites parties de moule par écartement dans une direction de démoulage et suppression de leur plan de joint,
  • enlèvement du noyau de fonderie réalisé.
The method of implementation is then as follows:
  • producing a mold in two complementary parts having inner shapes corresponding to those of the core to be obtained with a half-neck portion and a peripheral joint plane,
  • assembling the constituent parts of the mold with their peripheral surface constituting joint planes in contact with each other,
  • introduction and filling of the powder in the interior volume defined by the assembly of the two mold parts,
  • closure of the mold around the neck obtained by a plug, said plug providing a complementary function of holding and holding said two mold parts,
  • introduction of the filled mold into the isostatic compaction press
  • isostatic compression operation resulting in a volumetric deformation of the mold by a reduction of its volume and simultaneously compacting the powder to form the part or core,
  • after compaction of the part, intervention and suppression of the isostatic pressure to eliminate the 'isostatic compression' function resulting in the initial shaping of the mold by virtue of its shape memory and release of the mold with respect to the part or core produced,
  • demolding the mold with removal of the plug and opening of said mold parts by spacing in a demolding direction and removal of their joint plane,
  • removal of the foundry core.

Ainsi, selon l'invention, on combine la configuration d'un moule en deux parties avec plan de joints réalisées dans un matériau élastomère, notamment polyuréthane, ayant une capacité de déformation, avec le choix d'un matériau en forme de poudre susceptible de constituer la pièce à obtenir, et en introduisant cet ensemble dans la presse à compression isostatique pour assurer la fabrication de la pièce à obtenir ou noyau. La constitution du moule en matériau élastomère ayant une capacité de mémoire de forme et de déformation en reprenant sa forme initiale permet de démouler la pièce ou noyau et le retrait de la pièce ou noyau obtenu sans casse et sans devoir détruire, découper ou déchirer le moule. La configuration du moule en deux parties avec plan de joints périphériques apporte un avantage considérable en permettant de réaliser des noyaux avec des formes complexes non régulières en formes, en dimensions, en volumes, et ce sans risques de détérioration du noyau. Pour chacune des parties de moule, le négatif dimensionnel à former permet le démoulage de la pièce suivant une direction de démoulage.Thus, according to the invention, the configuration of a mold is divided into two parts with a plane of joints made of an elastomer material, in particular polyurethane, having a deformation capacity, with the choice of a material in the form of a powder capable of constitute the part to be obtained, and by introducing this set in the isostatic compression press to ensure the manufacture of the part to obtain or core. The constitution of the mold of elastomeric material having a shape memory capacity and deformation by resuming its original shape allows to unmold the piece or core and the removal of the part or core obtained without breakage and without having to destroy, cut or tear the mold . The configuration of the two-part mold with peripheral joint plane provides a considerable advantage by making it possible to produce cores with non-regular complex shapes in shapes, in dimensions, in volumes, without any risk of deterioration of the core. For each of the mold parts, the dimensional negative to be formed allows the mold to be demolded in a demolding direction.

La solution selon l'invention permet de réutiliser le moule puisque celui-ci reprend sa forme initiale lorsque la pression isostatique a été supprimée, et le moule est écarté latéralement en deux demi-parties de part et d'autre du noyau obtenu sans qu'il y ait de dégradation de ce dernier. Ce procédé, et le moule en particulier, permettent l'obtention de pièces ou noyaux ayant des formes complexes et des contre-dépouilles très importantes.The solution according to the invention makes it possible to reuse the mold since it returns to its original shape when the isostatic pressure has been eliminated, and the mold is spread laterally in two half-parts on either side of the core obtained without there is degradation of the latter. This method, and the mold in particular, make it possible to obtain parts or cores having complex shapes and very large undercuts.

Les parties (la) (1b) constitutives du moule peuvent avoir des épaisseurs plus ou moins importantes de l'ordre par exemple de 3 à 20 mm en formant une peau déformable autour de la pièce à compacter.The constituent parts (la) (1b) of the mold may have more or less important thicknesses of the order, for example from 3 to 20 mm, forming a deformable skin around the part to be compacted.

La liaison des parties (la) (1b) du moule avec le plan de joints périphérique s'effectue de toute manière appropriée par assemblage mâle-femelle par exemple pour pouvoir être démonté facilement en vue d'extraire la pièce ou noyau compacté obtenu. On peut envisager aussi que les dites parties (la) (1b) forme un plan de joints définissant une lèvre permettant leur assemblage avec un tenon (4) placé sur cette lèvre et disposé sur tout le périmètre des plans de joints définis par l'assemblage des parties (la) (1b) jusqu'au bouchon (3) pour assurer une étanchéité totale.The connection of the parts (la) (1b) of the mold with the peripheral joint plane is carried out in any suitable manner by male-female assembly for example to be easily disassembled to extract the piece or compacted core obtained. It can also be envisaged that said parts (1a) (1b) form a joint plane defining a lip allowing their assembly with a pin (4) placed on this lip and disposed over the entire perimeter of the joint planes defined by the assembly. parts (la) (1b) to the cap (3) to ensure complete sealing.

Les avantages ressortent bien de l'invention et en particulier on souligne la non destruction du moule et sa réutilisation. Il y a donc une économie de matière substantielle. L'invention permet en outre la réalisation d'un moule pour compacter des pièces ayant une grande variété de formes et pouvant comporter des contre-dépouilles.The advantages are apparent from the invention and in particular it emphasizes the non-destruction of the mold and its reuse. There is therefore a substantial economy of material. The invention also allows the production of a mold for compacting parts having a large variety of shapes and may include undercuts.

Claims (2)

  1. A mold for processing a powdered material by isostatic compaction to obtain a final product, the said mold consisting of an elastomer material having a shape memory, the said mold being produced in two parts (1a) (1b) internally contoured to correspond to the shapes of the part to be compacted defining a casting core, the said parts each comprising a neck (1c) in semi-parts which, when the said parts are assembled, form a trough for introduction of the material to be compacted, the said parts to be assembled having a peripheral mold joint (1d), a plug (3) made of elastomer material ensuring the sealed closure of the said mold thus obtained and the maintaining of the said parts to be assembled together; when the mold is closed, the peripheral contact surfaces of the said mold parts form the mold joint; the said mold after formation of the casting core has a larger internal volume than the volume of the said core thus released, the stripping of the said core being performed in the stripping direction, characterized in that the parts (1a) (1b) and the lip-forming mold joint (1d) thereof are assembled with a tenon (4) disposed over the entire perimeter of the mold joints up to the plug.
  2. A method of manufacturing a casting core of a powder-based material implementing the characteristics of a mold according to claim 1, characterized in that it implements the following operations:
    - production of a mold in two complementary parts of an elastomer material having internal shapes corresponding to those of the core to be obtained with a part in semi-neck format and a peripheral mold joint,
    - assembly of the constituent parts of the mold with the peripheral surface thereof constituting mold joints in contact with each other,
    - introduction and filling of the powder in the internal volume defined by the assembly of the two mold parts,
    - closure of the mold around the neck achieved by a plug of elastomer material, the said plug providing an additional function of holding and maintaining the said two mold parts together,
    - insertion of the filled mold into the isostatic compaction press,
    - isostatic compression operation producing a volumetric deformation of the mold by a reduction of the volume thereof and simultaneous compacting of the powder to form the part or core,
    - after compacting of the part, intervention and elimination of the isostatic pressure to eliminate the 'isostatic compression' function resulting in the return to initial shape of the mold thanks to its shape memory and release of the mold relative to the part or core produced,
    - stripping of the mold with removal of the plug and opening of the said mold parts by separation in a stripping direction and elimination of the mold joint thereof,
    - removal of the casting core produced.
EP12305746.5A 2011-06-28 2012-06-26 Isostatic press mould and method for manufacturing a foundry core from such a mould Not-in-force EP2540415B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1155754A FR2977175B1 (en) 2011-06-28 2011-06-28 ISOSTATIC COMPRESSION MOLD AND METHOD FOR PRODUCING FOUNDRY CORE FROM SUCH A MOLD

Publications (2)

Publication Number Publication Date
EP2540415A1 EP2540415A1 (en) 2013-01-02
EP2540415B1 true EP2540415B1 (en) 2018-11-21

Family

ID=46354120

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12305746.5A Not-in-force EP2540415B1 (en) 2011-06-28 2012-06-26 Isostatic press mould and method for manufacturing a foundry core from such a mould

Country Status (3)

Country Link
EP (1) EP2540415B1 (en)
ES (1) ES2699254T3 (en)
FR (1) FR2977175B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111761692A (en) * 2020-05-22 2020-10-13 横店集团东磁股份有限公司 Magnetic ring pressing die with movable mold core and pressing method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3591903A (en) * 1969-10-15 1971-07-13 Nat Forge Co Isostatic press with multipart mold
GB8409044D0 (en) * 1984-04-07 1984-05-16 Gkn Technology Ltd Casting metal articles
JPH0192000A (en) * 1987-10-02 1989-04-11 Kobe Steel Ltd Rubber mold for forming cip
JP3554604B2 (en) * 1995-04-18 2004-08-18 インターメタリックス株式会社 Compact molding method and rubber mold used in the method
JPH09241704A (en) * 1996-03-12 1997-09-16 Nisshin Steel Co Ltd Manufacture of irregular shaped molding by cold isostatic press molding of powder
US5937265A (en) * 1997-04-24 1999-08-10 Motorola, Inc. Tooling die insert and rapid method for fabricating same
DE10253205B4 (en) * 2002-11-15 2005-09-15 Ald Vacuum Technologies Ag Automated production process for the production of spherical graphite, fuel and absorber elements for high-temperature nuclear reactors (HTR)
EP2314401A1 (en) * 2009-09-09 2011-04-27 DePuy Products, Inc. Mould design and powder moulding process

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2540415A1 (en) 2013-01-02
FR2977175B1 (en) 2014-04-11
FR2977175A1 (en) 2013-01-04
ES2699254T3 (en) 2019-02-08

Similar Documents

Publication Publication Date Title
JP4821296B2 (en) Mold structure for injection molding
EP2540415B1 (en) Isostatic press mould and method for manufacturing a foundry core from such a mould
FR2975929A1 (en) Method for manufacturing e.g. foil flap, of aerodynamic surface of aircraft by thermoforming, involves ejecting air in thermoforming mold to cause deformation of plates until external faces adhere with male and female shapes of mold
FR2468455A1 (en) Elastic moulds which dilate in vacuum chamber - to release cast mouldings, to cast cosmetic pastes etc. with unblemished surfaces
CN207563737U (en) The powder metallurgy forming equipment of electric machine casing
FR2480667A1 (en) Mould with two stage ram for consolidating composite mouldings - is used to produce flash free mouldings without disorientation of integral fibres
CN104543062A (en) Cylindrical tea forming mould
JP2012219067A (en) Method for producing solid powder cosmetic
EP2682257A1 (en) Method and device for making parts in composite material by RTM
EP2955000A1 (en) Thermoforming mould device and method for manufacturing same and manufactured trim element
CN204482893U (en) A kind of mould of post tea
EP1260334B1 (en) Process and device for producing building components
US8865059B2 (en) Case for rolling powder alloy and method for producing rolled material
EP2233272B1 (en) Injection moulding device
JP6434217B2 (en) Method for producing solid powder cosmetic and solid powder cosmetic
EP0317412B1 (en) Composed die set for drawing press
EP0519798B1 (en) Process for the making of high power explosive charge and device for implementing the process
FR2525519A1 (en) Method of casting concrete inspection chamber - uses external and internal forms with latter lined by plates which are vibrated and withdrawn during pour
JP2916523B2 (en) Powder pressure molding method by iso-high pressure and rubber mold for powder pressure molding
JP6713236B2 (en) Method for producing solid powder cosmetic and solid powder cosmetic
JP7572343B2 (en) Press forming apparatus and method for manufacturing metal molded product
EP0324840B1 (en) Method and device for fabricating moulds from granular material
CH368928A (en) Automatic machine for molding plastic or rubbery objects
CH355609A (en) Multi-cavity mold
FR2954192A1 (en) SAND SUPPLY ASSEMBLY FOR AUTOMATIC SAND FOUNDRY MOLDING MACHINE AND METHOD OF SAND SUPPLYING SAME

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): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

17P Request for examination filed

Effective date: 20130614

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: FR

Ref legal event code: GC

Effective date: 20150325

17Q First examination report despatched

Effective date: 20161006

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20180720

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1066971

Country of ref document: AT

Kind code of ref document: T

Effective date: 20181215

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602012053738

Country of ref document: DE

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2699254

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20190208

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20181121

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1066971

Country of ref document: AT

Kind code of ref document: T

Effective date: 20181121

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

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190221

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190321

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190221

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

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190321

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190222

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121

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

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121

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

Ref country code: DE

Payment date: 20190521

Year of fee payment: 8

Ref country code: IT

Payment date: 20190521

Year of fee payment: 8

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602012053738

Country of ref document: DE

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

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121

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

Ref country code: BE

Payment date: 20190523

Year of fee payment: 8

Ref country code: FR

Payment date: 20190522

Year of fee payment: 8

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

Effective date: 20190822

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

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121

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

Ref country code: ES

Payment date: 20190701

Year of fee payment: 8

Ref country code: GB

Payment date: 20190522

Year of fee payment: 8

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

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121

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

Ref country code: IE

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

Effective date: 20190626

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: 20190630

Ref country code: CH

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

Effective date: 20190630

Ref country code: LU

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

Effective date: 20190626

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602012053738

Country of ref document: DE

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

Effective date: 20200626

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20200630

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

Ref country code: FR

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

Effective date: 20200630

Ref country code: GB

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

Effective date: 20200626

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

Ref country code: BE

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

Effective date: 20200630

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121

Ref country code: DE

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

Effective date: 20210101

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

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20120626

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

Ref country code: IT

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

Effective date: 20200626

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: 20200627

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

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181121