DE3822601A1 - Foam for use in the process for producing metal castings by means of cavityless casting - Google Patents

Foam for use in the process for producing metal castings by means of cavityless casting

Info

Publication number
DE3822601A1
DE3822601A1 DE19883822601 DE3822601A DE3822601A1 DE 3822601 A1 DE3822601 A1 DE 3822601A1 DE 19883822601 DE19883822601 DE 19883822601 DE 3822601 A DE3822601 A DE 3822601A DE 3822601 A1 DE3822601 A1 DE 3822601A1
Authority
DE
Germany
Prior art keywords
foam
additive
expandable polymer
organometallic compound
expandable
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Withdrawn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
DE19883822601
Other languages
German (de)
Inventor
Adalbert Prof Dr Ing Wittmoser
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.)
Huettenes Albertus Chemische Werke GmbH
Original Assignee
Gruenzweig und Hartmann AG
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
Priority to ZA880205A priority Critical patent/ZA89205B/en
Application filed by Gruenzweig und Hartmann AG filed Critical Gruenzweig und Hartmann AG
Priority to DE19883822601 priority patent/DE3822601A1/en
Priority to EP89101252A priority patent/EP0326095A3/en
Priority to US07/303,282 priority patent/US4877078A/en
Priority to BR898900341A priority patent/BR8900341A/en
Priority to KR1019890000863A priority patent/KR890011647A/en
Priority to JP1016515A priority patent/JPH01309749A/en
Priority to CN89100476A priority patent/CN1034874A/en
Publication of DE3822601A1 publication Critical patent/DE3822601A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
    • 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
    • B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
    • B22C1/04—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives for protection of the casting, e.g. against decarbonisation
    • 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
    • B22C7/023—Patterns made from expanded plastic materials

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Published without abstract.

Description

Die Erfindung betrifft einen Schaumstoff zur Verwendung beim Verfahren zur Herstellung von metallischen Guß­ teilen mittels des Vollformgießens unter Verwendung von verlorenen Gießmodellen aus Schaumkunststoff, das da­ durch gekennzeichnet ist, daß man mindestens einen eine metallorganische Verbindung enthaltenden Wirkstoff zu­ setzt, der die Bildung von Kohlenstoff bei der Vergasung des verlorenen Gießmodells teilweise oder ganz unter­ bindet, gemäß Patentanmeldung P 38 02 727.5.The invention relates to a foam for use in the process of producing metallic castings split using full mold casting using lost molds made of foam plastic that there is characterized in that one has at least one active ingredient containing organometallic compound which sets the formation of carbon in gasification of the lost casting model partially or completely below binds, according to patent application P 38 02 727.5.

Bei der Durchführung des Verfahrens zur Herstellung von metallischen Gußteilen mittels des Vollformgießens unter Verwendung von verlorenen Gießmodellen aus Schaumkunst­ stoff gemäß Patentanmeldung P 38 02 727.5 besteht das technische Problem, den eine metallorganische Verbindung enthaltenden Wirkstoff dem verlorenen Gießmodell auf möglichst einfache und zweckmäßige Weise so zuzusetzen, daß er die Bildung von Kohlenstoff bei der Vergasung des verlorenen Gießmodells möglichst vollständig unterbin­ det.When carrying out the process for producing metallic castings by means of full mold casting Use of lost foam models there is substance according to patent application P 38 02 727.5 technical problem that an organometallic compound containing active ingredient on the lost casting model as simple and convenient as possible to add  that it prevents the formation of carbon during the gasification of the prevent lost casting model as completely as possible det.

Zur Lösung dieses Problems hat es sich als zweck­ mäßig erwiesen, solchen Schaumstoff einzusetzen, der selbst mindestens einen eine metallorganische Verbindung enthaltenden Wirkstoff enthält, der die Bildung von Kohlenstoff bei der Vergasung des verlorenen Gießmodells teilweise oder ganz unterbindet.To solve this problem, it has been found to be useful moderately proven to use such foam that itself at least one organometallic compound Containing active ingredient, the formation of Carbon in the gasification of the lost casting model partially or completely prevented.

Der zur Verwendung im genannten Verfahren geeignete Schaumstoff kann aus expandierbarem Polymerisat herge­ stellt werden, das der Hersteller des Schaumstoffs in Form kleiner massiver, mit einem Treibmittel versetzter ungeschäumter Perlen vom Polymerisathersteller beziehen kann. Solche Perlen können z. B. durch Suspensionspoly­ merisation unter Zugabe von Treibmitteln hergestellt werden. Es ist vorteilhaft, bereits diese Perlen mit dem mindestens eine metallorganische Verbindung enthalten­ den Wirkstoff zu versehen. Dies kann z. B. beim Umgra­ nulieren der durch Suspensionspolymerisation erhaltenen Perlen erfolgen.The one suitable for use in the mentioned method Foam can be made of expandable polymer that the manufacturer of the foam in Form of small solid, mixed with a blowing agent Obtain unfoamed pearls from the polymer manufacturer can. Such beads can e.g. B. by suspension poly merisation with the addition of blowing agents will. It is advantageous to already use these beads with the contain at least one organometallic compound to provide the active ingredient. This can e.g. B. in Umgra nulate the obtained by suspension polymerization Pearls are made.

Gegenstand der Erfindung ist daher ein Schaumstoff zur Verwendung beim Verfahren zur Herstellung von metalli­ schen Gußteilen mittels des Vollformgießens unter Ver­ wendung von verlorenen Gießmodellen aus Schaumstoff, der gekennzeichnet ist durch den Gehalt an mindestens einem eine metallorganische Verbindung enthaltenden Wirkstoff, der die Bildung von Kohlenstoff bei der Vergasung des verlorenen Gießmodells teilweise oder ganz unterbindet. Gegenstand der Erfindung ist weiterhin ein expandierba­ res Polymerisat zur Herstellung des genannten Schaum­ stoffs, das gekennzeichnet ist durch den Gehalt an min­ destens einem eine metallorganische Verbindung enthal­ tenden Wirkstoff, der die Bildung von Kohlenstoff bei der Vergasung des verlorenen Gießmodells teilweise oder ganz unterbindet.The invention therefore relates to a foam for Use in the process for the production of metalli castings by means of full mold casting under Ver use of lost molds made of foam, the is characterized by the content of at least one an active ingredient containing an organometallic compound, which the formation of carbon in the gasification of the lost or partially lost casting model. The invention further relates to an expandable res polymer for the production of said foam substance that is characterized by the content of min at least contain an organometallic compound active ingredient that contributes to the formation of carbon  the gasification of the lost casting model partially or completely prevented.

Andererseits ist es auch möglich, Schaumstoffe durch Extrusionsverfahren herzustellen. In diesem Falle wird der mindestens eine metallorganische Verbindung ent­ haltende Wirkstoff dem zu extrudierenden Polymerisat zugesetzt.On the other hand, it is also possible to use foams To produce extrusion processes. In this case the at least one organometallic compound ent active ingredient holding the polymer to be extruded added.

Die metallorganische Verbindung kann ungelöst in fein­ teiliger Form oder in Form einer Lösung in einem geeig­ neten Lösungsmittel zugesetzt werden. So ist z. B. die besonders bevorzugte metallorganische Verbindung Ferro­ cen in Alkohol, Äther und Benzol löslich, während sie in Wasser unlöslich ist. Als expandierbares Polymerisat wird erfindungsgemäß insbesondere expandierbares Poly­ styrol eingesetzt.The organometallic compound can be undissolved in fine partial form or in the form of a solution in one Neten solvents are added. So z. B. the particularly preferred organometallic compound ferro cen soluble in alcohol, ether and benzene while in Water is insoluble. As an expandable polymer According to the invention, expandable poly in particular styrene used.

Gegenstand der Erfindung ist weiterhin die Verwendung des Additivs gemäß Patentanmeldung P 38 02 727.5, das dadurch gekennzeichnet ist, daß es als Wirksubstanz mindestens ein Metallocen und/oder sein Derivat enthält, als Zusatz zu expandierbarem Polymerisat sowie als Zu­ satz zu Polymerisat, das zu Schaumstoff extrudierbar ist, insbesondere Polystyrol.The invention further relates to the use of the additive according to patent application P 38 02 727.5, the is characterized in that it is an active substance contains at least one metallocene and / or its derivative, as an additive to expandable polymer and as additive Set to polymer that can be extruded into foam is, especially polystyrene.

Claims (8)

1. Schaumstoff zur Verwendung beim Verfahren gemäß Pa­ tentanmeldung P 38 02 727.5, gekennzeichnet durch den Gehalt an mindestens einem eine metallorgani­ sche Verbindung enthaltenden Wirkstoff, der die Bil­ dung von Kohlenstoff bei der Vergasung des verlore­ nen Gießmodells teilweise oder ganz unterbindet.1. Foam for use in the process according to patent application P 38 02 727.5, characterized by the content of at least one active substance containing an organometallic compound which partially or completely suppresses the formation of carbon during the gasification of the lost casting model. 2. Expandierbares Polymerisat zur Herstellung des Schaumstoffs gemäß Anspruch 1, gekennzeichnet durch den Gehalt an mindestens einem eine metallorganische Verbindung enthaltenden Wirkstoff, der die Bildung von Kohlenstoff bei der Vergasung des verlorenen Gießmodells teilweise oder ganz unterbindet.2. Expandable polymer for the production of Foam according to claim 1, characterized by the content of at least one organometallic Compound containing active ingredient, the formation of carbon in the gasification of the lost Casting model partially or completely prevented. 3. Expandierbares Polymerisat nach Anspruch 2, gekenn­ zeichnet durch einen Gehalt von 0,01 bis 1 Gew.-% Wirkstoff. 3. Expandable polymer according to claim 2, characterized characterized by a content of 0.01 to 1 wt .-% Active ingredient.   4. Expandierbares Polymerisat nach Anspruch 2 und/oder 3, dadurch gekennzeichnet, daß die metallorgani­ sche Verbindung ein Metallocen und/oder sein Deri­ vat ist.4. Expandable polymer according to claim 2 and / or 3, characterized in that the organometallic a metallocene and / or its deri vat is. 5. Expandierbares Polymerisat nach Anspruch 4, dadurch gekennzeichnet, daß das Metallocen Ferrocen, Alu­ minocen und/oder Manganocen ist.5. Expandable polymer according to claim 4, characterized characterized in that the metallocene ferrocene, aluminum minocen and / or manganocen. 6. Expandierbares Polystyrol nach einem der Ansprüche 2 bis 5.6. Expandable polystyrene according to one of the claims 2 to 5. 7. Verwendung des Additivs gemäß Patentanmeldung P 38 02 727.5 als Zusatz zu expandierbarem Polyme­ risat nach einem der Ansprüche 2 bis 6.7. Use of the additive according to the patent application P 38 02 727.5 as an additive to expandable polymer risat according to one of claims 2 to 6. 8. Verwendung des Additivs gemäß Patentanmeldung P 38 02 727.5 als Zusatz zu Polymerisat, das zu Schaumstoff extrudierbar ist.8. Use of the additive according to the patent application P 38 02 727.5 as an additive to polymer, which too Foam is extrudable.
DE19883822601 1988-01-29 1988-07-04 Foam for use in the process for producing metal castings by means of cavityless casting Withdrawn DE3822601A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
ZA880205A ZA89205B (en) 1988-01-29 1988-01-10 Lost pattern for production of full mold made of a plastic foam material, particularly exppanded polystyrene
DE19883822601 DE3822601A1 (en) 1988-07-04 1988-07-04 Foam for use in the process for producing metal castings by means of cavityless casting
EP89101252A EP0326095A3 (en) 1988-01-29 1989-01-25 Process for producing metallic castings by the full mold process
US07/303,282 US4877078A (en) 1988-01-29 1989-01-26 Pattern for use in lost pattern foundry process
BR898900341A BR8900341A (en) 1988-01-29 1989-01-27 LOST STANDARD FOR THE PRODUCTION OF COMPLETE MOLD MADE OF PLASTIC FOAM MATERIAL, PARTICULARLY EXPANDED POLYSTYRENE
KR1019890000863A KR890011647A (en) 1988-01-29 1989-01-27 Lost pattern for making full molds made of plastic foam, in particular expanded polystyrene
JP1016515A JPH01309749A (en) 1988-01-29 1989-01-27 Manufacture of metallic casting, foamed plastic for executing said method and expandable polymer
CN89100476A CN1034874A (en) 1988-01-29 1989-01-28 By plastic foam material, the mistake mould of the real mechanograph made of expanded polystyrene (EPS) particularly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19883822601 DE3822601A1 (en) 1988-07-04 1988-07-04 Foam for use in the process for producing metal castings by means of cavityless casting

Publications (1)

Publication Number Publication Date
DE3822601A1 true DE3822601A1 (en) 1990-01-11

Family

ID=6357920

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19883822601 Withdrawn DE3822601A1 (en) 1988-01-29 1988-07-04 Foam for use in the process for producing metal castings by means of cavityless casting

Country Status (1)

Country Link
DE (1) DE3822601A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9109533U1 (en) * 1991-08-01 1991-10-10 L. Bregenzer Giessereibedarf Gmbh & Co, 7000 Stuttgart, De
DE4124198A1 (en) * 1991-07-20 1993-01-21 Sinterstahl Gmbh METHOD FOR PRODUCING SINTER MOLDED PARTS BY COLD ISOSTATIC POWDER PRESSING IN ONE-TIME USE PRESSING MOLDS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4124198A1 (en) * 1991-07-20 1993-01-21 Sinterstahl Gmbh METHOD FOR PRODUCING SINTER MOLDED PARTS BY COLD ISOSTATIC POWDER PRESSING IN ONE-TIME USE PRESSING MOLDS
DE9109533U1 (en) * 1991-08-01 1991-10-10 L. Bregenzer Giessereibedarf Gmbh & Co, 7000 Stuttgart, De

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Legal Events

Date Code Title Description
8127 New person/name/address of the applicant

Owner name: HUETTENES-ALBERTUS CHEMISCHE WERKE GMBH, 4000 DUES

8139 Disposal/non-payment of the annual fee