FR3071754B1 - PROCESS FOR THE PREPARATION OF CERAMIC FOUNDRY CORES - Google Patents

PROCESS FOR THE PREPARATION OF CERAMIC FOUNDRY CORES Download PDF

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Publication number
FR3071754B1
FR3071754B1 FR1759176A FR1759176A FR3071754B1 FR 3071754 B1 FR3071754 B1 FR 3071754B1 FR 1759176 A FR1759176 A FR 1759176A FR 1759176 A FR1759176 A FR 1759176A FR 3071754 B1 FR3071754 B1 FR 3071754B1
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FR
France
Prior art keywords
ceramic
core
suspension
dispersant
crosslinking
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.)
Active
Application number
FR1759176A
Other languages
French (fr)
Other versions
FR3071754A1 (en
Inventor
Mirna Bechelany
Antoine Boyer
Celine Pochat
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.)
Centre National de la Recherche Scientifique CNRS
Safran SA
Original Assignee
Centre National de la Recherche Scientifique CNRS
Safran SA
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.)
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Publication date
Application filed by Centre National de la Recherche Scientifique CNRS, Safran SA filed Critical Centre National de la Recherche Scientifique CNRS
Priority to FR1759176A priority Critical patent/FR3071754B1/en
Publication of FR3071754A1 publication Critical patent/FR3071754A1/en
Application granted granted Critical
Publication of FR3071754B1 publication Critical patent/FR3071754B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B22C—FOUNDRY MOULDING
    • B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
    • B22C1/20—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
    • B22C1/20—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
    • B22C1/22—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins
    • B22C1/2293—Natural polymers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Moulds, Cores, Or Mandrels (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'un noyau céramique comprenant les étapes successives suivantes : -a) coulée ou injection basse pression dans un moule sacrificiel ou permanent imprimé 3D d'une suspension comprenant une poudre céramique, un solvant, un dispersant et un système gélifiant constitué par soit un mélange monomère/réticulant/catalyseur soit un polymère gélifiable ; -b) gélification de la suspension de l'étape a); -c) séchage du gel de céramique obtenu à l'étape b) ; -d) démoulage ou élimination du moule de façon à obtenir un noyau cru compact ; -e) déliantage du noyau cru compact obtenu à l'étape d) ; -f) frittage de la pièce obtenue à l'étape e) -g) récupération du noyau céramique. Elle concerne en outre une suspension pour la fabrication d'un noyau céramique par coulée ou injection basse pression, comprenant une poudre céramique, un solvant, un dispersant et un système gélifiant constitué par soit un mélange monomère/réticulant/catalyseur soit un polymère gélifiable.The present invention relates to a method of manufacturing a ceramic core comprising the following successive steps: a) low pressure casting or injection in a 3D printed sacrificial or permanent mold of a suspension comprising a ceramic powder, a solvent, a dispersant and a gelling system consisting of either a monomer / crosslinking / catalyst mixture or a gellable polymer; -b) gelation of the suspension from step a); -c) drying the ceramic gel obtained in step b); -d) demoulding or removal from the mold so as to obtain a compact green core; -e) debinding of the compact raw core obtained in step d); -f) sintering of the part obtained in step e) -g) recovery of the ceramic core. It further relates to a suspension for the manufacture of a ceramic core by casting or low pressure injection, comprising a ceramic powder, a solvent, a dispersant and a gelling system consisting of either a monomer / crosslinking / catalyst mixture or a gellable polymer.

FR1759176A 2017-10-02 2017-10-02 PROCESS FOR THE PREPARATION OF CERAMIC FOUNDRY CORES Active FR3071754B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1759176A FR3071754B1 (en) 2017-10-02 2017-10-02 PROCESS FOR THE PREPARATION OF CERAMIC FOUNDRY CORES

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1759176 2017-10-02
FR1759176A FR3071754B1 (en) 2017-10-02 2017-10-02 PROCESS FOR THE PREPARATION OF CERAMIC FOUNDRY CORES

Publications (2)

Publication Number Publication Date
FR3071754A1 FR3071754A1 (en) 2019-04-05
FR3071754B1 true FR3071754B1 (en) 2021-03-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR1759176A Active FR3071754B1 (en) 2017-10-02 2017-10-02 PROCESS FOR THE PREPARATION OF CERAMIC FOUNDRY CORES

Country Status (1)

Country Link
FR (1) FR3071754B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115179387B (en) * 2022-05-26 2023-04-21 中南大学 3D printing preparation method for wood pile type PZT support structure composite material driver

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5145908A (en) * 1988-02-22 1992-09-08 Martin Marietta Energy Systems, Inc. Method for molding ceramic powders using a water-based gel casting process
US5028362A (en) * 1988-06-17 1991-07-02 Martin Marietta Energy Systems, Inc. Method for molding ceramic powders using a water-based gel casting
US20070089849A1 (en) * 2005-10-24 2007-04-26 Mcnulty Thomas Ceramic molds for manufacturing metal casting and methods of manufacturing thereof
US7487819B2 (en) * 2006-12-11 2009-02-10 General Electric Company Disposable thin wall core die, methods of manufacture thereof and articles manufactured therefrom

Also Published As

Publication number Publication date
FR3071754A1 (en) 2019-04-05

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