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FR3130184A1 - Process for debinding a fibrous preform - Google Patents

Process for debinding a fibrous preform Download PDF

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Publication number
FR3130184A1
FR3130184A1 FR2113192A FR2113192A FR3130184A1 FR 3130184 A1 FR3130184 A1 FR 3130184A1 FR 2113192 A FR2113192 A FR 2113192A FR 2113192 A FR2113192 A FR 2113192A FR 3130184 A1 FR3130184 A1 FR 3130184A1
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France
Prior art keywords
binder
phase
elimination
preform
fibrous preform
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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
FR2113192A
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French (fr)
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FR3130184B1 (en
Inventor
Paul Carminati
Théophile LARDET
Nicolas Eberling-Fux
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Safran Ceramics SA
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Safran Ceramics SA
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Priority to FR2113192A priority Critical patent/FR3130184B1/en
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Application granted granted Critical
Publication of FR3130184B1 publication Critical patent/FR3130184B1/en
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/71—Ceramic products containing macroscopic reinforcing agents
    • C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
    • C04B35/80—Fibres, filaments, whiskers, platelets, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/24—Producing shaped prefabricated articles from the material by injection moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
    • B28B1/261—Moulds therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
    • B28B1/265—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor pressure being applied on the slip in the filled mould or on the moulded article in the mould, e.g. pneumatically, by compressing slip in a closed mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/0006—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects the reinforcement consisting of aligned, non-metal reinforcing elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
    • B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/111—Fine ceramics
    • C04B35/117—Composites
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    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
    • C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
    • C04B35/185—Mullite 3Al2O3-2SiO2
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
    • C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C04B35/63448—Polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B35/63488—Polyethers, e.g. alkylphenol polyglycolether, polyethylene glycol [PEG], polyethylene oxide [PEO]
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/638—Removal thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/14—Making preforms characterised by structure or composition
    • B29B11/16—Making preforms characterised by structure or composition comprising fillers or reinforcement
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
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    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
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    • C04B2235/5216—Inorganic
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Abstract

Procédé de déliantage d’une préforme fibreuse L’invention concerne un procédé d’élimination d’un liant d’une préforme fibreuse (1) comprenant une pluralité de fibres imprégnées par le liant et destinée à la fabrication d’une pièce en matériau composite, comprenant au moins : - une première phase d’élimination du liant par dissolution, - une phase de désagrégation d’amas du liant résiduels, après la première phase d’élimination, par circulation de gaz comprimé dans la préforme fibreuse, et - une deuxième phase d’élimination du liant par dissolution après la phase de désagrégation. Figure pour l’abrégé : Fig. 1.Method for debinding a fibrous preform The invention relates to a method for removing a binder from a fibrous preform (1) comprising a plurality of fibers impregnated with the binder and intended for the manufacture of a composite material part. , comprising at least: - a first phase of elimination of the binder by dissolution, - a phase of disintegration of clusters of residual binder, after the first phase of elimination, by circulation of compressed gas in the fibrous preform, and - a second phase of elimination of the binder by dissolution after the phase of disintegration. Figure for abstract: Fig. 1.

Description

Procédé de déliantage d’une préforme fibreuseProcess for debinding a fibrous preform

L’invention concerne un procédé de déliantage d’une préforme fibreuse mettant en œuvre une alternance de phases de dissolution et de circulation d’un gaz comprimé, afin d’améliorer l’élimination du liant, ainsi qu’un procédé de fabrication d’une pièce en matériau composite associé.The invention relates to a process for debinding a fibrous preform implementing an alternation of phases of dissolution and circulation of a compressed gas, in order to improve the elimination of the binder, as well as a process for manufacturing a part made of associated composite material.

On connait le brevet US10994446 qui divulgue le déliantage d’une préforme fibreuse par dissolution d’un liant thermoplastique dans un solvant avant introduction du matériau de matrice. Cette solution permet de fabriquer, avec un coût de production réduit, des pièces en matériau composite à propriétés mécaniques améliorées. Il est néanmoins possible de perfectionner encore davantage les propriétés mécaniques de ces pièces.Patent US10994446 is known, which discloses the debinding of a fibrous preform by dissolving a thermoplastic binder in a solvent before introducing the matrix material. This solution makes it possible to manufacture, with a reduced production cost, parts in composite material with improved mechanical properties. It is nevertheless possible to further improve the mechanical properties of these parts.

L’invention concerne un procédé d’élimination d’un liant d’une préforme fibreuse comprenant une pluralité de fibres imprégnées par le liant et destinée à la fabrication d’une pièce en matériau composite, comprenant au moins :
- une première phase d’élimination du liant par dissolution,
- une phase de désagrégation d’amas du liant résiduels, après la première phase d’élimination, par circulation de gaz comprimé dans la préforme fibreuse, et
- une deuxième phase d’élimination du liant par dissolution après la phase de désagrégation.The invention relates to a process for removing a binder from a fiber preform comprising a plurality of fibers impregnated with the binder and intended for the manufacture of a part made of composite material, comprising at least:
- a first phase of elimination of the binder by dissolution,
- a phase of disintegration of residual binder clusters, after the first elimination phase, by circulation of compressed gas in the fibrous preform, and
- a second phase of elimination of the binder by dissolution after the disintegration phase.

Les inventeurs ont constaté que des zones très chargées en liant (amas de liant résiduels) peuvent subsister après une première dissolution du liant par le solvant et peuvent entraver localement l’introduction du matériau de matrice. Cela aboutit à une pièce ayant des porosités résiduelles locales et donc des propriétés mécaniques qui peuvent être améliorées. La phase de désagrégation des amas de liant résiduels met en œuvre un gaz comprimé qui circule facilement dans l’ensemble de la porosité de la préforme pour fragmenter les amas de liant résiduels et faciliter ainsi leur élimination subséquente par dissolution. L’invention permet ainsi de réduire la porosité résiduelle de la pièce composite obtenue au final et, par conséquent, d’améliorer ses propriétés mécaniques. Il s’agit également d’une solution qui peut être mise en place dans le moule dans lequel l’introduction du matériau de matrice est effectuée, et donc qui s’intègre facilement à la gamme de fabrication.The inventors have observed that zones heavily loaded with binder (lumps of residual binder) may remain after the binder has been dissolved by the solvent for the first time and may locally hinder the introduction of the matrix material. This results in a part having local residual porosities and therefore mechanical properties which can be improved. The phase of disaggregation of the residual binder clusters uses a compressed gas which circulates easily throughout the porosity of the preform to fragment the residual binder clusters and thus facilitate their subsequent elimination by dissolution. The invention thus makes it possible to reduce the residual porosity of the composite part obtained in the end and, consequently, to improve its mechanical properties. It is also a solution that can be implemented in the mold in which the introduction of the matrix material is carried out, and therefore easily integrated into the manufacturing range.

Dans un exemple de réalisation, le procédé comprend en outre une deuxième phase de désagrégation d’amas du liant résiduels, après la deuxième phase d’élimination, par circulation de gaz comprimé dans la préforme fibreuse, et une troisième phase d’élimination du liant par dissolution après la deuxième phase de désagrégation.In an exemplary embodiment, the method further comprises a second phase of disaggregation of residual binder clusters, after the second elimination phase, by circulation of compressed gas in the fibrous preform, and a third phase of elimination of the binder by dissolution after the second phase of disintegration.

Une telle caractéristique permet de réduire davantage encore la porosité résiduelle de la pièce obtenue et donc d’améliorer davantage encore ses propriétés mécaniques.Such a characteristic makes it possible to further reduce the residual porosity of the part obtained and therefore to further improve its mechanical properties.

De manière générale, le procédé peut comprendre, après la deuxième phase d’élimination, une succession de plusieurs phases additionnelles de désagrégation d’amas du liant résiduels qui sont chacune suivies d’une phase additionnelle d’élimination par dissolution.In general, the method may comprise, after the second elimination phase, a succession of several additional phases of disintegration of residual binder clusters which are each followed by an additional phase of elimination by dissolution.

Dans un exemple de réalisation, le gaz comprimé est de l’air comprimé.In an exemplary embodiment, the compressed gas is compressed air.

Une telle caractéristique permet avantageusement de simplifier la solution technique.Such a characteristic advantageously makes it possible to simplify the technical solution.

Dans un exemple de réalisation, une pression du gaz comprimé circulant dans la préforme est supérieure ou égale à 1,5 bar, par exemple comprise entre 1,5 bar et 3 bar.In an exemplary embodiment, a pressure of the compressed gas circulating in the preform is greater than or equal to 1.5 bar, for example between 1.5 bar and 3 bar.

Une telle caractéristique participe à optimiser l’élimination des amas de liant résiduels.Such a feature contributes to optimizing the elimination of residual binder clusters.

Dans un exemple de réalisation, les fibres de la préforme sont en matériau céramique, par exemple en oxyde comme de l’alumine ou de la mullite. On ne sort toutefois pas du cadre de l’invention si les fibres sont en carbure ou nitrure, par exemple en carbure de silicium. On peut encore mettre en œuvre une préforme en fibres en carbone.In an exemplary embodiment, the fibers of the preform are made of ceramic material, for example of oxide such as alumina or mullite. However, it is not beyond the scope of the invention if the fibers are made of carbide or nitride, for example silicon carbide. It is also possible to implement a carbon fiber preform.

L’invention vise également un procédé de fabrication d’une pièce en matériau composite, comprenant au moins la mise en œuvre d’un procédé tel que décrit plus haut afin d’obtenir une préforme déliantée, et l’introduction d’une composition d’imprégnation dans la porosité de la préforme fibreuse déliantée afin de former une matrice dans la porosité de celle-ci.The invention also relates to a process for manufacturing a part made of composite material, comprising at least the implementation of a process as described above in order to obtain a debinded preform, and the introduction of a composition of impregnation in the pores of the debinded fibrous preform in order to form a matrix in the pores thereof.

Dans un exemple de réalisation, la matrice est une matrice céramique, par exemple en oxyde comme de l’alumine ou de la mullite. Selon une variante, la matrice peut être d’un autre type comme un nitrure ou carbure, par exemple le carbure de silicium. La matrice peut encore être organique selon une autre variante.In an exemplary embodiment, the matrix is a ceramic matrix, for example made of oxide such as alumina or mullite. According to a variant, the matrix can be of another type such as a nitride or carbide, for example silicon carbide. The matrix can still be organic according to another variant.

Dans un exemple de réalisation, la pièce est une pièce de turbomachine.In an exemplary embodiment, the part is a turbomachine part.

L’invention vise également un système pour la mise en œuvre d’un procédé d’élimination du liant tel que décrit plus haut, comprenant au moins :
- un moule définissant une chambre destinée à recevoir la préforme fibreuse à délianter,
- un ensemble en communication avec la chambre, ledit ensemble comprenant au moins (i) un dispositif d’introduction de solvant du liant en communication avec une première entrée du moule, et (ii) un dispositif d’introduction de gaz comprimé en communication avec une deuxième entrée du moule, identique ou distincte de la première entrée, et
- un dispositif d’évacuation de matière en communication avec une sortie du moule.The invention also relates to a system for implementing a process for removing the binder as described above, comprising at least:
- a mold defining a chamber intended to receive the fibrous preform to be debinded,
- an assembly in communication with the chamber, said assembly comprising at least (i) a device for introducing solvent of the binder in communication with a first inlet of the mold, and (ii) a device for introducing compressed gas in communication with a second mold entry, identical to or distinct from the first entry, and
- A material evacuation device in communication with an outlet of the mold.

Dans un exemple de réalisation, le moule comprend en outre un filtre situé entre la chambre et sa sortie.In an exemplary embodiment, the mold further comprises a filter located between the chamber and its outlet.

La représente, de manière schématique et partielle, un exemple de système selon l’invention. There schematically and partially represents an example of a system according to the invention.

La illustre l’évolution de la concentration en liant dans un solvant en sortie de moule dans le cadre d’un essai hors invention. There illustrates the evolution of the concentration of binder in a solvent at the outlet of the mold within the framework of a test outside the invention.

La fournit une thermographie infra-rouge en transmission et une coupe obtenue par microtomographie d’un matériau composite obtenu dans le cadre d’un essai hors invention. There provides an infrared thermography in transmission and a section obtained by microtomography of a composite material obtained within the framework of a test outside the invention.

La illustre l’évolution de la concentration en liant dans un solvant en sortie de moule dans le cadre d’un essai selon l’invention. There illustrates the evolution of the binder concentration in a solvent at the outlet of the mold in the context of a test according to the invention.

La fournit une thermographie infra-rouge en transmission d’un matériau composite obtenu dans le cadre d’un essai selon l’invention. There provides infrared thermography in transmission of a composite material obtained within the scope of a test according to the invention.

Claims (10)

Procédé d’élimination d’un liant d’une préforme fibreuse (1) comprenant une pluralité de fibres imprégnées par le liant et destinée à la fabrication d’une pièce en matériau composite, comprenant au moins :
- une première phase (PS) d’élimination du liant par dissolution,
- une phase (PG) de désagrégation d’amas du liant résiduels, après la première phase d’élimination, par circulation de gaz comprimé dans la préforme fibreuse, et
- une deuxième phase (PS) d’élimination du liant par dissolution après la phase de désagrégation.Process for removing a binder from a fibrous preform (1) comprising a plurality of fibers impregnated with the binder and intended for the manufacture of a part made of composite material, comprising at least:
- a first phase (PS) of elimination of the binder by dissolution,
- a phase (PG) of disintegration of residual binder clusters, after the first elimination phase, by circulation of compressed gas in the fibrous preform, and
- a second phase (PS) of elimination of the binder by dissolution after the disintegration phase. Procédé selon la revendication 1, dans lequel le procédé comprend en outre une deuxième phase (PG) de désagrégation d’amas du liant résiduels, après la deuxième phase (PS) d’élimination, par circulation de gaz comprimé dans la préforme fibreuse (1), et une troisième phase (PS) d’élimination du liant par dissolution après la deuxième phase de désagrégation.Process according to Claim 1, in which the process further comprises a second phase (PG) of disintegrating residual binder clusters, after the second phase (PS) of elimination, by circulation of compressed gas in the fibrous preform (1 ), and a third phase (PS) of elimination of the binder by dissolution after the second phase of disintegration. Procédé selon la revendication 1 ou 2, dans lequel le gaz comprimé est de l’air comprimé.A method according to claim 1 or 2, wherein the compressed gas is compressed air. Procédé selon l’une quelconque des revendications 1 à 3, dans lequel une pression du gaz comprimé circulant dans la préforme (1) est supérieure ou égale à 1,5 bar.Process according to any one of Claims 1 to 3, in which a pressure of the compressed gas circulating in the preform (1) is greater than or equal to 1.5 bar. Procédé selon l’une quelconque des revendications 1 à 4, dans lequel les fibres de la préforme (1) sont en matériau céramique.Method according to any one of Claims 1 to 4, in which the fibers of the preform (1) are made of ceramic material. Procédé de fabrication d’une pièce en matériau composite, comprenant au moins la mise en œuvre d’un procédé d’élimination du liant selon l’une quelconque des revendications 1 à 5 afin d’obtenir une préforme déliantée, et l’introduction d’une composition d’imprégnation dans la porosité de la préforme fibreuse déliantée afin de former une matrice dans la porosité de celle-ci.Process for manufacturing a part made of composite material, comprising at least the implementation of a process for removing the binder according to any one of Claims 1 to 5 in order to obtain a debinded preform, and the introduction of an impregnation composition in the porosity of the debinded fibrous preform in order to form a matrix in the porosity thereof. Procédé selon la revendication 6, dans lequel la matrice est une matrice céramique.A method according to claim 6, wherein the matrix is a ceramic matrix. Procédé selon la revendication 6 ou 7, dans lequel la pièce est une pièce de turbomachine.A method according to claim 6 or 7, wherein the part is a turbomachine part. Système pour la mise en œuvre d’un procédé d’élimination du liant selon l’une quelconque des revendications 1 à 5, comprenant au moins :
- un moule (10) définissant une chambre (2) destinée à recevoir la préforme fibreuse (1) à délianter,
- un ensemble en communication avec la chambre, ledit ensemble comprenant au moins (i) un dispositif (20) d’introduction de solvant du liant en communication avec une première entrée (15a) du moule, et (ii) un dispositif (30) d’introduction de gaz comprimé en communication avec une deuxième entrée (15b) du moule, identique ou distincte de la première entrée, et
- un dispositif d’évacuation de matière en communication avec une sortie (16) du moule.System for implementing a binder removal process according to any one of claims 1 to 5, comprising at least:
- a mold (10) defining a chamber (2) intended to receive the fibrous preform (1) to be debinded,
- an assembly in communication with the chamber, said assembly comprising at least (i) a device (20) for introducing binder solvent in communication with a first inlet (15a) of the mold, and (ii) a device (30) for introducing compressed gas in communication with a second inlet (15b) of the mold, identical to or distinct from the first inlet, and
- a material evacuation device in communication with an outlet (16) of the mould. Système selon la revendication 9, dans lequel le moule (10) comprend en outre un filtre (5) situé entre la chambre (2) et la sortie (16).A system according to claim 9, wherein the mold (10) further comprises a filter (5) located between the chamber (2) and the outlet (16).
FR2113192A 2021-12-09 2021-12-09 Process for debinding a fibrous preform Active FR3130184B1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5439627A (en) * 1990-06-29 1995-08-08 Flexline Services Ltd. Process for manufacturing reinforced composites
US5531958A (en) * 1993-10-01 1996-07-02 Basf Corporation Process for improving the debinding rate of ceramic and metal injection molded products
FR2943928A1 (en) * 2009-04-02 2010-10-08 Saint Gobain Ct Recherches SIC-BASED FILTERING STRUCTURE HAVING IMPROVED THERMOMECHANICAL PROPERTIES
FR3062336A1 (en) * 2017-02-02 2018-08-03 Safran Ceramics PROCESS FOR MANUFACTURING A PIECE OF COMPOSITE MATERIAL
FR3096299A1 (en) * 2019-05-23 2020-11-27 Safran Manufacturing process of a composite material part by injection of a slip loaded with a fibrous texture

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5439627A (en) * 1990-06-29 1995-08-08 Flexline Services Ltd. Process for manufacturing reinforced composites
US5531958A (en) * 1993-10-01 1996-07-02 Basf Corporation Process for improving the debinding rate of ceramic and metal injection molded products
FR2943928A1 (en) * 2009-04-02 2010-10-08 Saint Gobain Ct Recherches SIC-BASED FILTERING STRUCTURE HAVING IMPROVED THERMOMECHANICAL PROPERTIES
FR3062336A1 (en) * 2017-02-02 2018-08-03 Safran Ceramics PROCESS FOR MANUFACTURING A PIECE OF COMPOSITE MATERIAL
US10994446B2 (en) 2017-02-02 2021-05-04 Safran Ceramics Method for the production of a part made from a composite material
FR3096299A1 (en) * 2019-05-23 2020-11-27 Safran Manufacturing process of a composite material part by injection of a slip loaded with a fibrous texture

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