DE376085C - Process for the production of cores for iron and metal foundries - Google Patents

Process for the production of cores for iron and metal foundries

Info

Publication number
DE376085C
DE376085C DEC27957D DEC0027957D DE376085C DE 376085 C DE376085 C DE 376085C DE C27957 D DEC27957 D DE C27957D DE C0027957 D DEC0027957 D DE C0027957D DE 376085 C DE376085 C DE 376085C
Authority
DE
Germany
Prior art keywords
cores
production
iron
pitch
cement
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.)
Expired
Application number
DEC27957D
Other languages
German (de)
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.)
CHEMISCHE FABRIKEN WORMS AKT G
Original Assignee
CHEMISCHE FABRIKEN WORMS AKT G
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 CHEMISCHE FABRIKEN WORMS AKT G filed Critical CHEMISCHE FABRIKEN WORMS AKT G
Priority to DEC27957D priority Critical patent/DE376085C/en
Application granted granted Critical
Publication of DE376085C publication Critical patent/DE376085C/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C1/00Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/16Compositions 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
    • B22C1/167Mixtures of inorganic and organic binding agents

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Products (AREA)

Description

Verfahren zur Herstellung von Kernen für Eisen- und Metallgießereien. Zusatz zum Patent 368653. Durch das Hauptpatent 368653 ist ein Verfahren zur Herstellung von Kernen für Gießereien geschützt, das darin besteht, daß das dem Kernsand als Bindemittel zugesetzte Pech, Asphalt, Harz und andere Bitumina vor -der Mischung mit Sand durch Streudüsen zerstäubt oder mittels Windsichter in feinste Pulverform gebracht werden.Process for the production of cores for iron and metal foundries. Addition to the patent 368653. By the main patent 368653 is a process for the production protected by cores for foundries, which consists in the fact that the core sand as Pitch, asphalt, resin and other bitumens added to binders prior to mixing atomized with sand through sprinkling nozzles or in the finest powder form using an air classifier to be brought.

Zn weiterer Ausbildung dieses Verfahrens wurde gefunden, daß es zweckmäßig ist, dem feinverteilten Pech, Asphalt, Harz üsw. anorganische Bindemittel oder Braunkohlen-, Torf-, Lignitstaub zuzumischen. Der hierdurch erzielte Vorteil besteht darin, daß man mit erheblich geringeren Mengen (etwa der Hälfte) von dem teuren Pech usw. ebenso gute und haltbare Kerne herstellen kann wie _mit pulverisiertem Pech allein. Ferner wird hierdurch erreicht, däß die Neigung des Pechs, beim Versand oder Lagern, besonders bei höheren Temperaturen, zusammenzukleben, gänzlich aufgehoben wird.Further development of this process has been found to be useful is, the finely divided pitch, asphalt, resin, etc. inorganic binders or lignite, Mix in peat and lignite dust. The advantage achieved in this way is that one with considerably smaller amounts (about half) of the expensive pitch, etc. as well Can produce good and durable kernels like _with powdered pitch alone. Further is thereby achieved that the tendency of the pitch, when shipping or storage, especially at higher temperatures, sticking together, is completely canceled.

Zur Herstellung guter, brauchbarer Kerne können außer bindefähigen Erden auch sonstige anorganische Bindemittel wie Ton, Letten, Kaolin, Schieferton, Puzzolanerde, Zement, Portlandzement, Magnesiazement, Kalk, Gips, Alkalien, Gichtstaub usw. in möglichst feiner Verteilung den organischen Bitumina zugemischt werden.To produce good, usable cores you can also use bindable Also earth other inorganic binders such as clay, Letten, kaolin, slate clay, Pozzolana, cement, portland cement, magnesia cement, lime, gypsum, alkalis, gout dust etc. are mixed with the organic bitumina in as finely a distribution as possible.

Das Wesen der vorliegenden Zusatzerfindung besteht also darin, daß den dem Kernsand beigemengten, durch Streudüsen zerstäubten oder mittels Windsichter in feinste Pulverfornz gebrachten Bindemitteln, z. B. Pech, Asphalt, Harz oder andere Bitumina, noch andere Bindemittel, und zwar zu gleichen Teilen, z. B. Lehm, Ton, Letten, Kaolin, Puzzolanerde, Zement, Magnesiazement, Kalk, Gips, Alkalien, Gichtstaub usw., zugesetzt werden.The essence of the present additional invention is that those added to the core sand, atomized by sprinkling nozzles or by means of an air classifier binders brought into the finest powder form, e.g. B. pitch, asphalt, resin or others Bitumina, still other binders, in equal parts, e.g. B. loam, clay, Latvians, kaolin, pozzolana, cement, magnesia cement, lime, gypsum, alkalis, gout dust etc., can be added.

Die Beimischung der genannten Stoffe zu dem in feinste Pulverform gebrachten Pech usw. hat den Zweck, das verwendete feinst verteilte Pech usw. zu strecken und dessen ungünstige Eigenschaft des Zusammenbackens aufzuheben. Es war nicht ohne weiteres vorauszusehen, daß trotz der genannten Beimengungen die Vorteile des feinst verteilten Pechs usw., wie sie in dem Patent 368653 geschildert sind, zur Geltung kommen.The admixture of the substances mentioned in the finest powder form The pitch, etc. brought has the purpose of the finely divided pitch, etc. used stretch and cancel its unfavorable property of caking. It was it is not easy to foresee that the advantages, in spite of the additions mentioned the finely distributed pitch, etc., as described in patent 368653, come for retribution.

Claims (1)

PATENT-ANSPRucH: Ausführungsform des Verfahrens nach Patent 368653, dadurch gekennzeichnet, daß dem fein pulverisierten Pech u. dgl. noch andere, an sich bei der Kernformerei bekannte Bindemittel, wie Lehm, Ton, Letten, Kaolin, Schieferton, Puzzolanerde, Zement, Portlandzement, - Magnesiazement, Kalk, Gips; Alkalien, Gichtstaub usw. oder Braunkohlen-, Torf-, Lignitstaub usw., zugesetzt werden.PATENT CLAIM: embodiment of the method according to patent 368653, characterized in that the finely pulverized pitch and the like have others binders known from core molding, such as loam, clay, Letten, kaolin, slate, Pozzolana, cement, portland cement, magnesia cement, lime, gypsum; Alkalis, gout dust etc. or lignite, peat, lignite dust, etc., may be added.
DEC27957D 1919-04-01 1919-04-01 Process for the production of cores for iron and metal foundries Expired DE376085C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEC27957D DE376085C (en) 1919-04-01 1919-04-01 Process for the production of cores for iron and metal foundries

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEC27957D DE376085C (en) 1919-04-01 1919-04-01 Process for the production of cores for iron and metal foundries

Publications (1)

Publication Number Publication Date
DE376085C true DE376085C (en) 1923-05-22

Family

ID=7018505

Family Applications (1)

Application Number Title Priority Date Filing Date
DEC27957D Expired DE376085C (en) 1919-04-01 1919-04-01 Process for the production of cores for iron and metal foundries

Country Status (1)

Country Link
DE (1) DE376085C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1458104B1 (en) * 1963-10-10 Ver Zur Foerderung Der Giesser Carbon-containing additive for foundry molding compounds
DE1018198B (en) * 1952-11-06 1957-10-24 Franz A Wolf Dipl Ing Molding sand
DE1127543B (en) * 1956-12-22 1962-04-12 Chemotechnik Anstalt Fuer Chem Process for improving hard coal meal for foundry purposes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1018198B (en) * 1952-11-06 1957-10-24 Franz A Wolf Dipl Ing Molding sand
DE1127543B (en) * 1956-12-22 1962-04-12 Chemotechnik Anstalt Fuer Chem Process for improving hard coal meal for foundry purposes
DE1458104B1 (en) * 1963-10-10 Ver Zur Foerderung Der Giesser Carbon-containing additive for foundry molding compounds

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