AT92132B

AT92132B - Binder for the molding sand for cast core pieces.

Info

Publication number: AT92132B
Authority: AT
Original assignee: Chemische Fabriken Worms Ag
Priority date: 1916-12-18
Filing date: 1920-12-04
Publication date: 1923-04-10

Description

  

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  Bindemittel für den   Formsand für Cinsskernstücke.   



   Durch das Stammpatent Nr. 92131 ist die Verwendung von durch Streudüsen oder durch Behandlung mittels Windsichter in feinste Pulverform gebrachtem Pech, Asphalt, Harz od. dgl. Bitumen als Bindemittel für den Formsand für   Gusskernstücke   geschützt. 



   Es wurde nun gefunden, dass es zweckmässig ist, dem feinverteilten Pech, Asphalt, Harz usw. anorganische Bindemittel oder Braunkohlen-, Torf-,   Lignitstaub zuzumischen. Der hiedurch   erzielte Vorteil besteht darin,   clans   man mit erheblich geringeren Mengen, ungefähr der Hälfte, von dem teuren Pech usw. ebenso gute und haltbare Kerne herstellen kann, wie mit pulverisiertem Pech allein. Ferner wird hiedurch erreicht, dass die Neigung des Peches, beim Versand oder Lagern bebonders bei höheren Temperaturen zusammenzukleben, gänzlich aufgehoben wird. 



   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   Bituminis zugemischt   werden. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



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  Binding agent for the molding sand for pieces of cinss core.



   The parent patent no. 92131 protects the use of pitch, asphalt, resin or the like bitumen, brought into the finest powder form by scattering nozzles or by treatment using an air classifier, as a binding agent for the molding sand for cast core pieces.



   It has now been found that it is expedient to add inorganic binders or lignite, peat or lignite dust to the finely divided pitch, asphalt, resin, etc. The advantage achieved in this way is that clans can be produced with considerably smaller quantities, approximately half, of the expensive pitch, etc., as good and durable kernels as with pulverized pitch alone. This also means that the pitch's tendency to stick together during shipping or storage, especially at higher temperatures, is completely eliminated.



   To produce good, usable cores, other inorganic binders such as clay, lettuce, kaolin, slate, pozzolana, cement, portland cement, magnesia cement, lime, gypsum, alkalis, gout dust, etc. can be added to the organic bituminous in as finely a distribution as possible, in addition to earths that can be bound.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

Claims

PATENT CLAIM: Binder for the molding sand for cast core pieces according to patent no. 92131, characterized in that the pitch, asphalt, resin and the like brought into the finest powder form by scattering nozzles or by means of an air classifier. Like. Bitumen to increase the transport and storage capacity, other substances are added, which can also be binders themselves, such as loam, clay, Letten, kaolin, slate, pozzolana, cement, Portland cement, magnesia cement, lime, gypsum, alkalis, gout dust or lignite, peat, lignite dust. ** WARNING ** End of CLMS field may overlap beginning of DESC **.