DE157061C - - Google Patents
Info
- Publication number
- DE157061C DE157061C DENDAT157061D DE157061DA DE157061C DE 157061 C DE157061 C DE 157061C DE NDAT157061 D DENDAT157061 D DE NDAT157061D DE 157061D A DE157061D A DE 157061DA DE 157061 C DE157061 C DE 157061C
- Authority
- DE
- Germany
- Prior art keywords
- powder
- sand
- molding
- model
- stearin
- 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
- 239000000843 powder Substances 0.000 claims description 15
- DCXXMTOCNZCJGO-UHFFFAOYSA-N Stearin Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(OC(=O)CCCCCCCCCCCCCCCCC)COC(=O)CCCCCCCCCCCCCCCCC DCXXMTOCNZCJGO-UHFFFAOYSA-N 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 235000002918 Fraxinus excelsior Nutrition 0.000 claims 1
- 239000002956 ash Substances 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 238000000465 moulding Methods 0.000 description 5
- 239000004576 sand Substances 0.000 description 4
- 239000003110 molding sand Substances 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- 235000014692 zinc oxide Nutrition 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 229940072033 potash Drugs 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 229920001592 potato starch Polymers 0.000 description 1
- 239000012261 resinous substance Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMTPATENT OFFICE
Ein brauchbarer Formenpuder soll bewirken, daß einerseits das mit demselben eingestäubte Modell sich leicht aus dem Formsande herausheben läßt, ohne ein Anhaften des Sandes an dem Modelle zu verursachen, und andererseits soll durch den Formenpuder ein Anbrennen des Sandes an dem Gußstück verhütet werden. In bisher, gebräuchlichen Modellpudern war nun z. B.A usable molding powder should have the effect that on the one hand that with the same Dusted model can be easily lifted out of the molding sand without sticking of the sand on the model, and on the other hand, the molding powder is intended to burn the sand the casting are prevented. In previously used model powders, z. B.
ίο neben einem harzigen Stoff Pottasche und Kartoffelmehl enthalten; letzteres hat jedoch den Nachteil, daß es beim Trocknen der Formen infolge seiner Eigenschaft, Feuchtigkeit aufzusaugen, treibt und dadurch ein Abfallen des Puders von der Sandschicht oder von der Modelloberfiäche hervorruft.ίο next to a resinous substance potash and Contain potato flour; However, the latter has the disadvantage that when drying the Forms as a result of its property of absorbing moisture, drives in and through it Causes the powder to fall off the sand layer or the model surface.
Um nun diese Nachteile hintanzuhalten und um der obengenannten Forderung eines guten Formenpuders zu genügen, wird bei der Herstellung des durch die vorliegende Erfindung gekennzeichneten Formenpuders wie folgt verfahren:In order to keep these disadvantages at bay and to meet the above requirement Sufficient mold powder is used in the manufacture of the present Invention marked molding powder proceed as follows:
Zunächst wird Pech, Stearin und Wachs in einem Kessel zu einer dünnflüssigen Masse zusammengeschmolzen und als weitere Bestandteile diesem Gemisch Asche, Metallpulver, Metalloxyd, wie z. B. Zinkweiß, zugesetzt und kräftig eingerührt. Nach dem Erkalten und Trocknen wird die Masse dann zu einem Pulver vermählen. Die Stoffe Pech, Stearin und Wachs verleihen dem Puder infolge ihrer fettigen Eigenschaften die Fähigkeit, der Feuchtigkeit zu widerstehen, wodurch ein Anhaften des Formsandes an den mit Puder eingestäubten Modellen, sowie ein Zusammenkleben der beiden Sandhälften im Ober- und Unterkasten vermieden wird. Die anderen Bestandteile, insbesondere die Metalloxyde, wie Zinkweiß, Magnesia usw., haben den Zweck, ein Anbrennen des Formsandes an dem Gußstück zu verhindern.First, pitch, stearin and wax are turned into a thin liquid in a kettle Mass melted together and as further components of this mixture ash, metal powder, Metal oxide, such as B. zinc white, added and stirred in vigorously. After this Cooling and drying, the mass is then ground to a powder. The fabrics Pitch, stearin and wax give the powder due to their greasy properties the ability to withstand moisture, causing the molding sand to stick on the models dusted with powder, as well as sticking the two sand halves in the upper and lower box is avoided. The other components, in particular the metal oxides, such as zinc white, magnesia, etc., have the purpose of burning the molding sand onto the casting to prevent.
Die Mischungsverhältnisse der einzelnen Stoffe, aus denen der Formenpuder hergestellt wird, können verschiedenartig sein. In der Praxis hat man jedoch herausgefunden, daß eine Mischung.von 12 1 Pech, V2 kg Stearin, 1J2 kg Wachs, 6 1 Zinkweiß, 2 1 Asche und 20 g Aluminiumpulver die besten Ergebnisse hinsichtlich der Verwendbarkeit des Formenpuders liefert.The mixing ratios of the individual substances from which the molding powder is made can be different. In practice, however, it has been found that a mixture of 12 l pitch, V 2 kg stearin, 1 J 2 kg wax, 6 l zinc white, 2 l ash and 20 g aluminum powder gives the best results in terms of the usability of the molding powder.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE157061C true DE157061C (en) |
Family
ID=423369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT157061D Active DE157061C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE157061C (en) |
-
0
- DE DENDAT157061D patent/DE157061C/de active Active
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