DE1920581A1 - Oil binder for foundry sands - water - Google Patents

Oil binder for foundry sands - water

Info

Publication number
DE1920581A1
DE1920581A1 DE19691920581 DE1920581A DE1920581A1 DE 1920581 A1 DE1920581 A1 DE 1920581A1 DE 19691920581 DE19691920581 DE 19691920581 DE 1920581 A DE1920581 A DE 1920581A DE 1920581 A1 DE1920581 A1 DE 1920581A1
Authority
DE
Germany
Prior art keywords
oil
molding sand
water
foundry molding
oil binder
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.)
Granted
Application number
DE19691920581
Other languages
German (de)
Other versions
DE1920581C3 (en
DE1920581B2 (en
Inventor
Berndt Dipl-Ing Heinz
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.)
Buderus AG
Original Assignee
BuderusSche Eisenwerke 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
Application filed by BuderusSche Eisenwerke AG filed Critical BuderusSche Eisenwerke AG
Priority to DE19691920581 priority Critical patent/DE1920581C3/en
Priority to JP3462770A priority patent/JPS4940052B1/ja
Publication of DE1920581A1 publication Critical patent/DE1920581A1/en
Publication of DE1920581B2 publication Critical patent/DE1920581B2/en
Application granted granted Critical
Publication of DE1920581C3 publication Critical patent/DE1920581C3/en
Expired legal-status Critical Current

Links

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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)

Abstract

Moulding sand as in DT 1758733 contains an amount of oil which, under heat, separates onto the sand particles at least 40% of its weight in the dilute or undiluted state as glance coal. Spec., the oil contains unsaturated and/or polymerisable hydrocarbons. It also contains sulphur and/or emulsifiers.

Description

Gießereiformsand Die vorliegende Erfindung bezieht sich auf einen Qießereiformsand mit einem Anteil an Bentonit und Wasser, dem gem. Patentanmeldung P 17 58 733.6 anstelle des Kohlenstaubes t)l mit einem hohen Anteil an schweren Kohlenwasserstoffen zugegeben ist.Foundry molding sand The present invention relates to a Foundry molding sand with a proportion of bentonite and water, according to the patent application P 17 58 733.6 instead of coal dust t) l with a high proportion of heavy Hydrocarbons is added.

Außer den auf diese Weise erzielten hauptsächlichen Vorteilen, nämlich der geringeren Staubentwicklung und Desaktivierung des Bentonits sowie der größeren Fließfähigkeit und Gasdurchlässigkeit des Formsandes kann der Formsand noch wesentlich verbessert werden, wenn man ein Glanzkohlenstoff-abgebendes Ol bestimmter Zusammensetzung bzw. Eigenschaften verwendet. Das Öl soll mindestens 40 ffi Glanzkohlenstoff abscheiden, im wesentlichen ungesättigte und/oder polymerisationsfähige Kohlenwasserstoffe enthalten, durch Zusatz von Schwefel und/oder die Verwendung schwefelhaltiger Kohlenwasserstofföle bzw. Zusatz von geeigneten Emulgatoren sich in feuchtem Formsand emulsionsartig homogen verteilen lassen.Besides the main advantages achieved in this way, viz the lower dust generation and deactivation of the bentonite as well as the larger ones The molding sand can still substantially flow and gas permeability of the molding sand can be improved if you use a glossy carbon-releasing oil of a certain composition or properties used. The oil should separate at least 40 ffi lustrous carbon, contain essentially unsaturated and / or polymerizable hydrocarbons, by adding sulfur and / or using sulfur-containing hydrocarbon oils or the addition of suitable emulsifiers is emulsion-like in moist molding sand let distribute homogeneously.

Es wurde nämlich gefunden, daß besonders gUnstige gießtechnische Ergebnisse resultieren, wenn dieses bl mindestens 4o % Glanzkohlenstoff beim Erhitzen der Formstoffmischung auf den Quarzkörnern ausscheidet.It has been found that particularly favorable casting results result if this bl at least 40% lustrous carbon when heating the molding material mixture precipitates on the quartz grains.

Ferner wurde festgestellt, daß gesättigte Sohlenwasserstofföle beim ffberhitzen während des Gießprozesses reaktionsträge sind und zum größten Teil unverändert verdampfen, bevor sie thermisch zersetzt werden.It has also been found that saturated hydrocarbon oils ffoverheating during the casting process are inert and largely unchanged evaporate before they are thermally decomposed.

Die erfindungsgemäßen ble haben den Vorteil, daß sie bei Hitzeeinwirkung zunächst polymerisieren und dadurch zur Bindung der Sandkörner beitragen bevor sie sich durch weitere Hitzesteigerung in gasförmige Spaltprodukte zersetzen.The ble according to the invention have the advantage that they are exposed to heat polymerize first and thereby contribute to the binding of the sand grains before they themselves decompose into gaseous fission products by further increasing heat.

Der Zusatz von Schwefel in einem Faktisierungsprozess kann neben den bereits erwähnten Maßnahmen die Verteilbarkeit im feuchten Formsand fördern und so eine bestmögliche Ausnutzung des zugegebenen Öles ermöglichen.The addition of sulfur in a billing process can in addition to the the measures already mentioned promote the dispersibility in the moist molding sand and thus enable the best possible utilization of the added oil.

Claims (3)

PatentansprücheClaims 1.) Gießereiformsand mit einem Anteil an Bentonit, Wasser und Öl mit hohem Anteil an schweren Kohlenwasserstoffen gem. Patentanmeldung P 17 58 733.6, g e k e n n z e i c h n e t d u r c h einen solchen blzusatz, welcher bei Hitzeeinwirkung mindestens 40 % des Eigengewichtes im verdünnten oder unverdünnten Zustand als Glanzkohlenstoff an den Sandpartikiln abscheidet.1.) Foundry molding sand with a proportion of bentonite, water and oil high proportion of heavy hydrocarbons according to patent application P 17 58 733.6, not indicated by such an additive, which when exposed to heat at least 40% of its own weight in the diluted or undiluted state as lustrous carbon deposited on the sand particles. 2.) Gießereiformsand nach Anspruch 1, g e k e n nz e i c h n e t d u r c h einen solchen Ölzusatz, welcher im wesentlichen ungesättigte und/oder polymerisationsfähige Kohlenwasserstoffe enthält.2.) Foundry molding sand according to claim 1, g e k e n nz e i c h n e t d u r c h such an oil additive which is essentially unsaturated and / or polymerizable Contains hydrocarbons. 3.) Gießereiformsand nach einem der Ansprüche 1 und2, g e k e n n z e i c h n e t d a d u r c h, daß das Öl einen Gehalt an Schwefel und/oder Emulgator aufweist.3.) Foundry molding sand according to one of claims 1 and 2, g e k e n n I do not know that the oil contains sulfur and / or emulsifier having.
DE19691920581 1969-04-23 1969-04-23 Method of making a casting mold Expired DE1920581C3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19691920581 DE1920581C3 (en) 1969-04-23 1969-04-23 Method of making a casting mold
JP3462770A JPS4940052B1 (en) 1969-04-23 1970-04-22

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691920581 DE1920581C3 (en) 1969-04-23 1969-04-23 Method of making a casting mold

Publications (3)

Publication Number Publication Date
DE1920581A1 true DE1920581A1 (en) 1970-11-05
DE1920581B2 DE1920581B2 (en) 1978-12-07
DE1920581C3 DE1920581C3 (en) 1979-08-02

Family

ID=5732036

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19691920581 Expired DE1920581C3 (en) 1969-04-23 1969-04-23 Method of making a casting mold

Country Status (2)

Country Link
JP (1) JPS4940052B1 (en)
DE (1) DE1920581C3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS507558U (en) * 1973-05-18 1975-01-25
JPS521734A (en) * 1975-06-24 1977-01-07 Sasakura Eng Co Ltd Heat recovering method

Also Published As

Publication number Publication date
JPS4940052B1 (en) 1974-10-30
DE1920581C3 (en) 1979-08-02
DE1920581B2 (en) 1978-12-07

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Legal Events

Date Code Title Description
OGA New person/name/address of the applicant
C3 Grant after two publication steps (3rd publication)
8340 Patent of addition ceased/non-payment of fee of main patent