DE134760C - - Google Patents
Info
- Publication number
- DE134760C DE134760C DENDAT134760D DE134760DA DE134760C DE 134760 C DE134760 C DE 134760C DE NDAT134760 D DENDAT134760 D DE NDAT134760D DE 134760D A DE134760D A DE 134760DA DE 134760 C DE134760 C DE 134760C
- Authority
- DE
- Germany
- Prior art keywords
- clay
- slate
- refractory
- molding compound
- coal
- 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.)
- Active
Links
- 239000004927 clay Substances 0.000 claims description 11
- 229910052570 clay Inorganic materials 0.000 claims description 11
- 239000010454 slate Substances 0.000 claims description 11
- 150000001875 compounds Chemical class 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 239000003245 coal Substances 0.000 claims description 5
- 239000000571 coke Substances 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000010304 firing Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000843 powder Substances 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N AI2O3 Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000002349 favourable Effects 0.000 description 1
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
Description
|sÄ^lXlS ERUCHE S | sÄ ^ lXlS ERUCHE S
PATENTAMT.PATENT OFFICE.
Bei der bisher gebräuchlichen Formmasse für Stahlgufs, welche aus Silbersand, gebrannter, feuerfester Thonerde und Koks hergestellt wird, ist der wesentliche Nachtheil vorhanden, dafs vor Benutzung der Masse ein langsames Trocknen bis in den innersten Kern hinein nothwendig ist.In the case of the previously used molding compound for steel castings, which are made of silver sand, burnt, refractory alumina and coke are produced, the essential disadvantage is that they are made before using the mass, slowly dry it right into the innermost core is necessary.
Ohne Zweifel erfordert dieser Trockenprocefs einen grofsen Zeit- und Kostenaufwand.Undoubtedly, this drying process requires a great deal of time and money.
Das vorliegende Verfahren unterscheidet sich von den bisher üblichen dadurch, dafs statt der gebrannten feuerfesten Thonerde Kohlenthonschiefer verwendet wird. Dieser Kohlenthonschiefer ist ein Abfall, welcher bisher als vollkommen werthlos galt. Es sind nun bereits Versuche gemacht worden, Schieferpulver für Giefsereizwecke zu verwenden (D i η g 1 e r ' s Polytechnisches Journal, Stuttgart 184g, Bd. 1 1 3, Seite 137), und zwar wurde dieses Pulver besonders zur Herstellung von Formen zum Giefsen kleiner Eisen- und Messinggegenstände verwendet. Es wird in dieser Veröffentlichung ausdrücklich darauf hingewiesen, dafs nicht gewagt wurde, grofse Stücke zu giefsen, weil sich die Formen zu leicht zusammendrücken und sich der Schiefer zu stark setzt. Es war dieses ein Beweis dafür, dafs der gewöhnliche Schiefer zur Verwendung gelangte, welcher nicht genügend thonhaltig ist, um genügend Widerstand leisten zu können.The present process differs from the previously customary ones in that it takes place the fired refractory clay coal clay shale is used. This coal clay slate is a waste that was previously considered to be completely worthless. There are now Attempts have been made to use slate powder for foundry purposes (D i η g 1 e r 's Polytechnisches Journal, Stuttgart 184g, Vol. 1 1 3, Page 137), this powder was especially used for the production of molds for Giefsen used small iron and brass objects. It will be in this publication expressly pointed out that no one dared cast large pieces because the shapes compress too easily and the slate settles too much. It was this a proof that the common slate was used, which one does not contain enough clay to be able to offer sufficient resistance.
Aufserdem wird ausdrücklich in dieser Veröffentlichung bemerkt, dafs nur kleine Eisen- und Messinggegenstände in mit Schieferpulver hergestellten Formen gegossen werden können.In addition, it is expressly noted in this publication that only small iron and brass objects can be cast in molds made with slate powder.
Demgegenüber wird beim vorliegenden Verfahren Kohlenthonschiefer verwendet, welcher genügend thonhaltig sein mufs, um knetbar zu sein, d. h. der Kohlenthonschiefer mufs genügend fett sein, damit eine knetbare Formmasse erzielt wird. Die mit Kohlenthonschiefer erzeugte Gufsmasse ist so widerstandsfähig, dafs der in die Form gegossene Stahl dieselbe nicht treibt. Die hergestellten Gufstheile fallen vollkommen glatt aus, so dafs ein Putzen im bisherigen Umfange nicht mehr nothwendig ist.In contrast, in the present process, carbon clay slate is used, which must contain enough clay to be kneadable, d. H. the carbon dioxide slate must be sufficient be fat so that a kneadable molding compound is obtained. The ones with coal shale The casting compound produced is so resistant that the steel poured into the mold is the same does not propel. The cast parts produced are perfectly smooth, so that cleaning in the previous scope is no longer necessary.
Die Formmasse gemäfs vorliegender Erhndung wird hergestellt, indem Silbersand und Koks mit gemahlenem Kohlenthonschiefer innig vermengt und nach erfolgter Vermengung unter ganz mäfsiger Erwärmung lufttrocken gemacht wird. Es ist nicht erforderlich, dafs die Masse bis in ihr Innerstes hinein trocken gemacht ist, sondern es genügt vollkommen, dafs nur die Aufsenschale, wie bereits erwähnt, lufttrocken ist.The molding compound according to the present invention is produced by adding silver sand and coke intimately mixed with ground coal clay slate and after mixing under very moderate warming is made air-dry. It is not necessary that the mass is made dry to the inside, but it is perfectly sufficient that it is only the outer shell, as already mentioned, is air dry.
Als besonders günstig für die Herstellung der Formmasse sindAs particularly favorable for the production of the molding compound
6 Theile Kohlenthonschiefer,
3 Theile Silbersand und
7, Theil Koks.6 parts of coal-clay slate,
3 parts of silver sand and
7, part of coke.
Da der verwendete Kohlenthonschiefer eine sonst werthlose Masse ist, so bietet die Masse neben den bereits erwähnten Vortheilen noch den, dafs sich der Preis um über ein Drittel mäfsiger stellt, wie derjenige der bisher verwendeten Formmasse.Since the coal-clay slate used is an otherwise worthless mass, the mass offers besides the advantages already mentioned, the fact that the price has increased by over a third is more moderate than that of the previously used molding compound.
Claims (1)
Publications (1)
Publication Number | Publication Date |
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DE134760C true DE134760C (en) |
Family
ID=402856
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DENDAT134760D Active DE134760C (en) |
Country Status (1)
Country | Link |
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DE (1) | DE134760C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5576378A (en) * | 1991-10-16 | 1996-11-19 | The Dow Chemical Company | High Tg polymer and redispersible powder for use in hydraulic portland cement mortar and concrete |
US6075075A (en) * | 1995-07-19 | 2000-06-13 | Basf Aktiengesellschaft | Use of aqueous polymer dispersions for modifying mineral building materials |
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0
- DE DENDAT134760D patent/DE134760C/de active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5576378A (en) * | 1991-10-16 | 1996-11-19 | The Dow Chemical Company | High Tg polymer and redispersible powder for use in hydraulic portland cement mortar and concrete |
US6075075A (en) * | 1995-07-19 | 2000-06-13 | Basf Aktiengesellschaft | Use of aqueous polymer dispersions for modifying mineral building materials |
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