EP2103363A2 - Procédé de fabrication de noyaux présentant une géométrie complexe à des fins de fonderie - Google Patents

Procédé de fabrication de noyaux présentant une géométrie complexe à des fins de fonderie Download PDF

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Publication number
EP2103363A2
EP2103363A2 EP09001436A EP09001436A EP2103363A2 EP 2103363 A2 EP2103363 A2 EP 2103363A2 EP 09001436 A EP09001436 A EP 09001436A EP 09001436 A EP09001436 A EP 09001436A EP 2103363 A2 EP2103363 A2 EP 2103363A2
Authority
EP
European Patent Office
Prior art keywords
core
cores
insert
soluble
binder
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.)
Withdrawn
Application number
EP09001436A
Other languages
German (de)
English (en)
Other versions
EP2103363A3 (fr
Inventor
Andreas Nissen
Steffen Süptitz
Steffen Funke
Stefan Hess
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.)
Eisenwerk Hasenclever & Sohn GmbH
Original Assignee
Eisenwerk Hasenclever & Sohn GmbH
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 Eisenwerk Hasenclever & Sohn GmbH filed Critical Eisenwerk Hasenclever & Sohn GmbH
Publication of EP2103363A2 publication Critical patent/EP2103363A2/fr
Publication of EP2103363A3 publication Critical patent/EP2103363A3/fr
Withdrawn legal-status Critical Current

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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
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/02—Lost patterns
    • 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
    • B22C9/103—Multipart cores
    • 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
    • B22C9/105—Salt cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/18—Finishing

Definitions

  • the invention relates to a process for the production of solid cores used in foundry technology to form apertures or cavities on a casting, wherein the cores are made by introducing a molding material binder system into a core box corresponding to the engraving of the shape of the core.
  • Such a method is for example from the DE 102005043754 A1 known.
  • the castings to be produced by core production, casting and casting have complex component geometries with openings, undercuts and / or cavities, it is necessary to produce equally complex core geometries.
  • the invention is therefore based on the object to provide a method for producing cores of the type mentioned above, which allows the formation of complex core geometries with one-piece cores, wherein the cores produced therewith avoid the formation of gaps in the region of the cores.
  • the basic idea of the invention is that, to form more complex core geometries, separate insert cores made from a molding material are inserted into the engravings of the core box and become integral parts of raw cores formed in a first process step by introducing the molding material mixture having an insoluble binder system and that subsequently the insert cores are dissolved by means of a treatment applied to the dissolvable binder system used and that of the Einlegekernen initially covered partial surfaces of the raw cores are cleaned.
  • an inorganic binder is used as a binder for the production of the insert cores.
  • a water-soluble binder is used, wherein the attached to the Rohkernen located inserts by spraying the insert cores are dissolved with water.
  • To remove the insert cores from the raw core can be provided that the insert cores are removed after their pre-treatment by blowing compressed air to the cores.
  • the partial surfaces of the raw cores initially covered by the insert cores are subjected to a grinding process and / or that the partial surfaces of the cores initially covered by the insert cores are smoothed with tools.
  • FIG. 1 illustrated core 10 having a shaping with a lower base 11, on which a circumferential rim 12 is arranged.
  • the collar 12 is provided with a plurality of re-entrant undercuts 13, the formation of which is difficult to accomplish in the manufacture of the prior art core 10 as a one-piece core.
  • FIG. 2 results, in the outer shape of the core 10 predetermining core mold 15 as a tool insert core 14 is inserted, which fills the region of the core 10 to be formed undercuts 13. Then now with the core mold 15 with the insert core 14 fixed therein filled in the customary for core production molding material binder system based on an insoluble binder, so there is a Rohkern 17 which consists of the area of the actual core 10 and the associated insert core 14. After removal of this Rohkerns 17 from the core mold 15, the insert core 14 is now removed, so that only the actual core 10 remains of the raw core 17, as in FIG. 1 shown.
  • the insert core 14 consists of an inorganic, preferably water-soluble binder having molding material mixture
  • the binder dissolves when spraying the Rohkerns 17 with water, so that the insert core 14 disintegrates and, for example, by pressurizing compressed air from the Rohkern 17th can be blown off, so that the desired shape of the core 10 ( FIG. 1 ) remains.
  • the thus exposed part surfaces 16 of the core 10 may require a final cleaning by smoothing with tools or possibly a grinding process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP09001436A 2008-02-14 2009-02-03 Procédé de fabrication de noyaux présentant une géométrie complexe à des fins de fonderie Withdrawn EP2103363A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810009092 DE102008009092B3 (de) 2008-02-14 2008-02-14 Verfahren zur Herstellung von eine komplexe Geometrie aufweisenden Kernen für Gießereizwecke

Publications (2)

Publication Number Publication Date
EP2103363A2 true EP2103363A2 (fr) 2009-09-23
EP2103363A3 EP2103363A3 (fr) 2012-03-21

Family

ID=40561045

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09001436A Withdrawn EP2103363A3 (fr) 2008-02-14 2009-02-03 Procédé de fabrication de noyaux présentant une géométrie complexe à des fins de fonderie

Country Status (2)

Country Link
EP (1) EP2103363A3 (fr)
DE (1) DE102008009092B3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4223432A1 (fr) * 2022-01-27 2023-08-09 Volkswagen Aktiengesellschaft Moule pour la coulée en lingotière

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005043754A1 (de) 2005-09-13 2007-03-22 Minelco Gmbh Verfahren und Vorrichtung zur Herstellung von Kernformlingen für die Gießereitechnik

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2090181B (en) * 1977-07-22 1983-02-02 Rolls Royce Manufacturing a blade or vane for a gas turbine engine
GB2193132A (en) * 1986-07-17 1988-02-03 Bsa Foundries Limited Moulding a core within a destructible mould
DE4019433C1 (en) * 1990-06-19 1991-08-29 Theodor Heimeier Metallwerk Kg, 4782 Erwitte, De Removal of flash and application of wash coating to foundry cores - comprising circulating cores in ring vibrator to which grinding medium contg. two types of grinding body is added
DE19549469C2 (de) * 1995-07-12 1999-05-12 Eichenauer Gmbh & Co Kg F Gießkern zum Gießformen und Verfahren zum Herstellen eines solchen Gießkerns
DE60032824T2 (de) * 1999-10-26 2007-11-08 Howmet Research Corp., Whitehall Mehrwandiger kern und verfahren
DE10314373A1 (de) * 2003-03-28 2004-10-07 Rwth Aachen Urfomverfahren für ein Bauteil mit Mikrostruktur-Funktionselement
JP4209286B2 (ja) * 2003-08-19 2009-01-14 トヨタ自動車株式会社 高強度水溶性中子、及びその製造方法
JP3994957B2 (ja) * 2003-11-06 2007-10-24 トヨタ自動車株式会社 鋳物砂及び水溶性無機塩バインダーの再利用方法及び装置
DE102005023051A1 (de) * 2005-05-13 2006-11-16 Hydro Aluminium Alucast Gmbh Gießform zum Gießen von Metallschmelze
US7624787B2 (en) * 2006-12-06 2009-12-01 General Electric Company Disposable insert, and use thereof in a method for manufacturing an airfoil

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005043754A1 (de) 2005-09-13 2007-03-22 Minelco Gmbh Verfahren und Vorrichtung zur Herstellung von Kernformlingen für die Gießereitechnik

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4223432A1 (fr) * 2022-01-27 2023-08-09 Volkswagen Aktiengesellschaft Moule pour la coulée en lingotière

Also Published As

Publication number Publication date
DE102008009092B3 (de) 2009-05-20
EP2103363A3 (fr) 2012-03-21

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