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WO2006010449A2 - Ceramic cores - Google Patents

Ceramic cores Download PDF

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Publication number
WO2006010449A2
WO2006010449A2 PCT/EP2005/007353 EP2005007353W WO2006010449A2 WO 2006010449 A2 WO2006010449 A2 WO 2006010449A2 EP 2005007353 W EP2005007353 W EP 2005007353W WO 2006010449 A2 WO2006010449 A2 WO 2006010449A2
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WO
WIPO (PCT)
Prior art keywords
cores according
cast
cast cores
proportion
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.)
Ceased
Application number
PCT/EP2005/007353
Other languages
German (de)
French (fr)
Other versions
WO2006010449A3 (en
Inventor
Peter Stingl
Gudrun Schiller
Gisbert Schulze
Dieter Käfer
Christos G. Aneziris
Jana Hubálková
Antje Kynast
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.)
Ceramtec GmbH
Original Assignee
Ceramtec 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 Ceramtec GmbH filed Critical Ceramtec GmbH
Publication of WO2006010449A2 publication Critical patent/WO2006010449A2/en
Publication of WO2006010449A3 publication Critical patent/WO2006010449A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • B22C1/26—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 carbohydrates; of distillation residues therefrom

Definitions

  • the invention relates to cast cores of a material based on salt or carbon for use in the production of metallic castings.
  • the cores In order to meet these requirements, materials are used for the casting cores matched to the metal to be cast and the resulting casting process, with the binders used here is of particular importance.
  • the cores must be dimensionally stable at casting temperature, on the other hand, the cores must be easily and completely removed after casting.
  • Object of the present invention is to present casting cores made of a ceramic material, which ensure the necessary strength during casting and can be removed easily and completely.
  • the object is solved by the features claimed in the claims.
  • the ceramic casting cores according to the invention are produced by processes known for the production of molded parts in ceramic technology.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Mold Materials And Core Materials (AREA)

Abstract

The demands placed upon cores are high. Firstly, the cores must be easy to produce, dimensionally stable and exact with regard to contours, the materials used for producing them should neither harm the environment nor cause health threats and, finally, they should enable the residues of a core to be removed as easily, quickly and completely as possible after casting. To this end, the invention provides cores for producing metallic cast parts, preferably aluminum molded parts. These cores are characterized in that they are comprised of base materials based on salt or carbon and that inorganic and/or organic binders are provided for hardening during the production and maintaining shape during the casting.

Description

Keramische Gusskerne Ceramic cast cores

Die Erfindung betrifft Gusskerne aus einem Werkstoff auf der Basis von Salz oder Kohlenstoff zur Verwendung bei der Herstellung von metallischen Gussteilen.The invention relates to cast cores of a material based on salt or carbon for use in the production of metallic castings.

Bei der Herstellung metallischer Gussteile ist es notwendig, in den Gussteilen vorgesehene Hohlräume in der Gießform durch Formkörper auszufüllen, die die Konturen des Hohlraums genau ausfüllen. Diese Formkörper sind die sogenannten Gusskerne, die die Funktion eines Platzhalters für den späteren Hohlraum einnehmen. Die Anforderungen, die an die Gusskerne gestellt werden, sind hoch. Sie müssen sich leicht herstellen lassen, formstabil und konturengenau sein, die für ihre Herstellung verwendeten Werkstoffe sollen weder die Umwelt belasten, noch gesundheitliche Gefährdungen verursachen und schließlich sollen nach dem Guss die Rückstände eines Kerns möglichst einfach, schnell und vollständig entfernt werden können.In the production of metallic castings, it is necessary to fill cavities provided in the castings in the casting mold by means of shaped bodies which precisely fill the contours of the cavity. These shaped bodies are the so-called casting cores, which occupy the function of a placeholder for the later cavity. The demands placed on the cores are high. They must be easy to produce, dimensionally stable and contour-accurate, the materials used for their production should not pollute the environment or pose a health hazard and, finally, after the casting, the residues of a core should be as simple, quick and complete removal.

Um diese Anforderungen zu erfüllen, werden auf das zu gießende Metall und das daraus resultierende Gießverfahren abgestimmte Werkstoffe für die Gusskerne verwendet, wobei den dabei verwendeten Bindemitteln eine besondere Bedeutung zukommt. Einerseits müssen die Kerne bei Gießtemperatur formstabil sein, andererseits müssen sich die Kerne nach dem Guß leicht und vollständig entfernen lassen.In order to meet these requirements, materials are used for the casting cores matched to the metal to be cast and the resulting casting process, with the binders used here is of particular importance. On the one hand, the cores must be dimensionally stable at casting temperature, on the other hand, the cores must be easily and completely removed after casting.

Aufgabe der vorliegenden Erfindung ist es, Gusskerne aus einem keramischen Werkstoff vorzustellen, weiche beim Gießen die notwendige Festigkeit gewährleisten und sich leicht und vollständig entfernen lassen.Object of the present invention is to present casting cores made of a ceramic material, which ensure the necessary strength during casting and can be removed easily and completely.

Die Aufgabe wird durch die in den Ansprüchen beanspruchten Merkmale gelöst. Die Herstellung der erfindungsgemäßen keramischen Gusskerne erfolgt nach Verfahren, wie sie zur Herstellung von Formteilen in der keramischen Technologie bekannt sind. The object is solved by the features claimed in the claims. The ceramic casting cores according to the invention are produced by processes known for the production of molded parts in ceramic technology.

Claims

Patentansprüche claims 1. Gusskerne zur Verwendung bei der Herstellung von metallischen Gussteilen, vorzugsweise Aluminiumformteilen, dadurch gekennzeichnet, dass sie aus Grundwerkstoffen auf der Basis von Salz oder Kohlenstoff bestehen und dass anorganische und/oder organische Bindemittel vorgesehen sind zurCast cores for use in the production of metallic castings, preferably aluminum moldings, characterized in that they consist of base materials based on salt or carbon and in that inorganic and / or organic binders are provided for Verfestigung bei der Herstellung und Formerhaltung beim Gießen.Solidification in the production and retention of shape during casting. 2. Gusskerne nach Anspruch 1 , dadurch gekennzeichnet, dass der Grundwerkstoff auf der Basis von Kohlenstoff Grafit ist.2. casting cores according to claim 1, characterized in that the base material is based on carbon graphite. 3. Gusskerne nach Anspruch 1 , dadurch gekennzeichnet, dass der Grundwerkstoff auf der Basis von Kohlenstoff Bakelitharz ist.3. casting cores according to claim 1, characterized in that the base material is based on carbon bakelite resin. 4. Gusskerne nach Anspruch 1 , dadurch gekennzeichnet, dass der Grundwerkstoff auf der Basis von Kohlenstoff Novolak oder Resol-Harze ist.4. Cast cores according to claim 1, characterized in that the base material is based on carbon novolac or resole resins. 5. Gusskerne nach Anspruch 1, dadurch gekennzeichnet, dass der Grundwerkstoff auf der Basis von Kohlenstoff Carbores ist.5. casting cores according to claim 1, characterized in that the base material is based on carbon carbores. 6. Gusskerne nach Anspruch 1 , dadurch gekennzeichnet, dass der Grundwerkstoff auf der Basis von Kohlenstoff Epoxy-Harze sind.6. cast cores according to claim 1, characterized in that the base material based on carbon epoxy resins. 7. Gusskerne nach Anspruch 1 , dadurch gekennzeichnet, dass der Grundwerkstoff auf der Basis von Kohlenstoff Pech ist.7. casting cores according to claim 1, characterized in that the base material is based on carbon pitch. 8. Gusskerne nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Bindemittel hochaktive Kieselsäure, insbesondere Diatomeenerde, ist.8. Cast cores according to one of claims 1 to 7, characterized in that the binder is highly active silicic acid, in particular diatomaceous earth. 9. Gusskerne nach Anspruch 8, dadurch gekennzeichnet, dass der Anteil an Kieselsäure im Bereich von 0,1 % bis 10 Gew.% liegt. 9. casting cores according to claim 8, characterized in that the proportion of silica in the range of 0.1% to 10 wt.% Is. 10. Gusskerne nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Bindemittel nanoskaliges SiO2 ist.10. casting cores according to one of claims 1 to 7, characterized in that the binder is nanoscale SiO 2 . 11. Gusskerne nach Anspruch 10, dadurch gekennzeichnet, dass der Anteil an nanoskaligem SiO2 Jm Bereich von 0,1 % bis 40 Gew.% liegt.11. Cast cores according to claim 10, characterized in that the proportion of nanoscale SiO 2 Jm range from 0.1% to 40 wt.% Is. 12. Gusskerne nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Bindemittel nanoskaliges TiO2 ist.12. Cast cores according to one of claims 1 to 7, characterized in that the binder is nanoscale TiO 2 . 13. Gusskerne nach Anspruch 12, dadurch gekennzeichnet, dass der Anteil an nanoskaligem TiO2 im Bereich von 0,1 % bis 40 Gew.% liegt.13. Cast cores according to claim 12, characterized in that the proportion of nanoscale TiO 2 is in the range of 0.1% to 40% by weight. 14. Gusskerne einem der Ansprüche 1 bis 7, gekennzeichnet durch eine Kombination der Bindemittel aus nanoskaligem TiO2 und SiO2.14. Cast cores one of claims 1 to 7, characterized by a combination of the binder of nanoscale TiO 2 and SiO 2 . 15. Gusskerne nach Anspruch 14, dadurch gekennzeichnet, dass der Anteil der Kombination von nanoskaligem TiO2 und SiO2 im Bereich von 0,1 % bis 60 Gew.% liegt.15. Cast cores according to claim 14, characterized in that the proportion of the combination of nanoscale TiO 2 and SiO 2 is in the range of 0.1% to 60% by weight. 16. Gusskerne nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Bindemittel Tonerdezement ist.16. Cast cores according to one of claims 1 to 7, characterized in that the binder is alumina cement. 17. Gusskerne nach Anspruch 16, dadurch gekennzeichnet, dass der Anteil an Tonerdezement im Bereich von 0,1 % bis 10 Gew.% liegt.17. Cast cores according to claim 16, characterized in that the proportion of alumina cement in the range of 0.1% to 10 wt.% Is. 18. Gusskerne nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Bindemittel Sorelzement ist.18. Cast cores according to one of claims 1 to 7, characterized in that the binder is Sorelzement. 19. Gusskerne nach Anspruch 18, dadurch gekennzeichnet, dass der Anteil an Sorelzement im Bereich von 0,1 % bis 10 Gew.% liegt.19. Cast cores according to claim 18, characterized in that the proportion of Sorelzement in the range of 0.1% to 10 wt.% Is. 20. Gusskerne nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Bindemittel feindisperses MgO und/oder feindisperser Spinell sind. - A -20. Cast cores according to one of claims 1 to 7, characterized in that the binder are finely dispersed MgO and / or finely dispersed spinel. - A - 21. Gusskerne nach Anspruch 20, dadurch gekennzeichnet, dass der Anteil an feindispersem MgO und/oder feindispersem Spinell im Bereich von 0,1 % bis 40 Gew.% liegt.21. Cast cores according to claim 20, characterized in that the proportion of finely dispersed MgO and / or finely dispersed spinel is in the range of 0.1% to 40% by weight. 22. Gusskerne nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Bindemittel Lignin und/oder Ligninsulfonate sind.22. Cast cores according to one of claims 1 to 7, characterized in that the binder lignin and / or lignin sulfonates. 23. Gusskerne nach Anspruch 22, dadurch gekennzeichnet, dass der Anteil an Lignin und/oder Ligninsulfonaten im Bereich von 0,1 % bis 10 Gew.% liegt.23. Cast cores according to claim 22, characterized in that the proportion of lignin and / or Ligninsulfonaten in the range of 0.1% to 10 wt.% Is. 24. Gusskerne nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Bindemittel Hydroxide, vorzugsweise Aluminiumhydroxid, sind.24. Cast cores according to one of claims 1 to 7, characterized in that the binder hydroxides, preferably aluminum hydroxide. 25. Gusskerne nach Anspruch 24, dadurch gekennzeichnet, dass der Anteil an Hydroxiden beim Grundwerkstoff Salz im Bereich von 0,1 % bis 5 Gew.% liegt.25. Cast cores according to claim 24, characterized in that the proportion of hydroxides in the base material salt is in the range of 0.1% to 5% by weight. 26. Gusskerne nach Anspruch 24, dadurch gekennzeichnet, dass der Anteil an Hydroxiden beim Grundwerkstoff Kohlenstoff im Bereich von 0,1 % bis 10 Gew.% liegt.26. Cast cores according to claim 24, characterized in that the proportion of hydroxides in the base material carbon is in the range of 0.1% to 10% by weight. 27. Gusskerne nach einem der Ansprüche 8 bis 26, dadurch gekennzeichnet, dass das Bindersystem aus einer Kombination der in diesen Ansprüchen genannten Bindemittel besteht.27. Cast cores according to one of claims 8 to 26, characterized in that the binder system consists of a combination of the binders mentioned in these claims. 28. Gusskerne nach einem der Ansprüche 1 bis 27, dadurch gekennzeichnet, dass die Gusskerne zur Herstellung von Aluminiumformteilen verwendet werden.28. Cast cores according to one of claims 1 to 27, characterized in that the casting cores are used for the production of aluminum moldings. 29. Gusskerne nach Anspruch 28, dadurch gekennzeichnet, dass die Gusskerne zur Herstellung von Kolben für Automobilanwendungen verwendet werden. 29. Cast cores according to claim 28, characterized in that the casting cores are used for the production of pistons for automotive applications.
PCT/EP2005/007353 2004-07-23 2005-07-04 Ceramic cores Ceased WO2006010449A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102004035976.8 2004-07-23
DE102004035976 2004-07-23
DE102004035977.6 2004-07-23
DE102004035977 2004-07-23

Publications (2)

Publication Number Publication Date
WO2006010449A2 true WO2006010449A2 (en) 2006-02-02
WO2006010449A3 WO2006010449A3 (en) 2006-08-03

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010007180A3 (en) * 2008-07-18 2010-06-17 Ceramtec Ag Salt-based cores and method for the production thereof
CN106424583A (en) * 2016-12-02 2017-02-22 江麓机电集团有限公司 Water-soluble core based on near-closed inner cavity and preparation method of water-solute core based on near-closed inner cavity

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1036068A (en) * 1962-05-29 1966-07-13 Philips Electronic Associated Improvements in and relating to methods of producing a water-soluble mass suitable for the manufacture of cores for wax models
US3521884A (en) * 1965-03-22 1970-07-28 Dow Chemical Co Article with an expanded vermicular graphite core
CH497933A (en) * 1969-07-23 1970-10-31 Aeroplane Motor Alu Cast Resin-bound foundry cores contg soluble salt
FR2077555A1 (en) * 1969-12-16 1971-10-29 Sumitomo Chemical Co Magnesium chloride-based water-soluble - removable casting cores
DE3004466A1 (en) * 1980-02-07 1981-08-13 Sigri Elektrographit Gmbh, 8901 Meitingen Highly porous carbon moulding core prodn. - by moulding mixt. of porous carbon powder and binder in core mould and heating to cure binder
US5248552A (en) * 1990-07-11 1993-09-28 Advanced Plastics Partnership Molding core
GB2253170B (en) * 1991-02-28 1994-08-10 Ae Piston Products Removable cores for metal castings
JP3217747B2 (en) * 1998-03-27 2001-10-15 旭テック株式会社 Membranous molding for casting
DE19911847A1 (en) * 1999-03-17 2000-09-28 Deutsch Zentr Luft & Raumfahrt Fine and molded casting in plastic / carbon aerogels
DE19939062A1 (en) * 1999-08-18 2001-02-22 Deutsch Zentr Luft & Raumfahrt Use of plastic / carbon aerogels as the core material
DE10126865B4 (en) * 2001-06-01 2005-09-08 Neue Materialien Würzburg GmbH Substrate and use of the substrate
DE10216464B4 (en) * 2002-04-12 2004-04-15 Deutsches Zentrum für Luft- und Raumfahrt e.V. Silica-bonded core materials, processes for their production and their use
DE10216403B4 (en) * 2002-04-12 2004-03-18 Deutsches Zentrum für Luft- und Raumfahrt e.V. Airgel-bound molded materials with high thermal conductivity
EP1515816B1 (en) * 2002-06-25 2005-10-19 Mahle Gmbh Method for producing a cooled ring carrier
FR2842129B1 (en) * 2002-07-10 2005-04-08 Peugeot Citroen Automobiles Sa METHOD FOR MOLDING A METAL PIECE IN A MOLD COMPRISING AT LEAST ONE MOLDING CORE, METHOD FOR PRODUCING A MOLDING CORE, AND MOLDING CORE
DE10312782B4 (en) * 2003-03-21 2005-05-04 Emil Müller GmbH Water-soluble salt cores and process for producing water-soluble salt cores

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010007180A3 (en) * 2008-07-18 2010-06-17 Ceramtec Ag Salt-based cores and method for the production thereof
CN102159342A (en) * 2008-07-18 2011-08-17 陶瓷技术有限责任公司 Salt-based cores and methods of making the same
CN106424583A (en) * 2016-12-02 2017-02-22 江麓机电集团有限公司 Water-soluble core based on near-closed inner cavity and preparation method of water-solute core based on near-closed inner cavity

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Publication number Publication date
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