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DE754487C - Process for cleaning molds - Google Patents

Process for cleaning molds

Info

Publication number
DE754487C
DE754487C DEB200798D DEB0200798D DE754487C DE 754487 C DE754487 C DE 754487C DE B200798 D DEB200798 D DE B200798D DE B0200798 D DEB0200798 D DE B0200798D DE 754487 C DE754487 C DE 754487C
Authority
DE
Germany
Prior art keywords
molds
bath
casting
water
mold
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
DEB200798D
Other languages
German (de)
Inventor
Friedrich Haspel
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DEB200798D priority Critical patent/DE754487C/en
Application granted granted Critical
Publication of DE754487C publication Critical patent/DE754487C/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C23/00—Tools; Devices not mentioned before for moulding
    • B22C23/02—Devices for coating moulds or cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/002—Castings of light metals
    • B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Description

Verfahren zum Reinigen von Kökillen Die Erfindung bezieht sich auf ein Verfahren zum Reinigen von eisernen oder stählernen Kokillen für Leichtmetall-, z. B. Aluminiumguß durch Tauchen in ein Bad. Bisher wurden derartige Kokillen nach dem Gießen mechanisch gereinigt, z. B. mit Schaber, Feile, Meißel, Stahlbürste oder mit dem Sandstrahlgebläse. Dieses bekannte Verfahren hat den Nachteil, daß für seine Durchführung geschulte Arbeitskräfte notwendig sind, daß ferner erhebliche Aufwendungen an Zeit und Kosten gemacht werden müssen und schließlich, daß die Maßhaltigkeit der Kokillen leidet. Außerdem war es bekannt, erhitzte Kokillen in ein Isolierstoff enthaltendes Wasserbad einzutauchen und auf diese Weise einen Isolierüberzug zu bilden. Beim Gießen von Kupferlegierungen entstehende Oxydniederschläge sollten sich dabei auf diesem Isolierüberzug niederschlagen und beim nächsten Eintauchen zusammen mit diesem abgewaschen werden. Tatsächlich läßt sich aber nicht vermeiden, daß sich Reste des vergossenen Metalls auf der Kokillenwand festsetzen. Gemäß der Erfindung wird deshalb vorgeschlagen, die Kokillen in ein den betreffenden Gußwerkstoff auflösendes Laugebad zu bringen und anschließend mit Wasser abzuspülen, z. B. abzuspritzen oder abzuwaschen, vorzugsweise zunächst mit heißem und dann mit kaltem Wasser. Als Lauge kommt insbesondere technische Natronlauge in Frage, die je nach der aufzulösenden Legierung konzentriert oder in geeigneter Verdünnung zu verwenden ist.Method of cleaning cocoons The invention relates to a process for cleaning iron or steel molds for light metal, z. B. Aluminum casting by immersion in a bath. So far, such molds were after mechanically cleaned after casting, e.g. B. with scraper, file, chisel, steel brush or with the sandblasting blower. This known method has the disadvantage that for his Carrying out trained workers are necessary that also require considerable expenses in terms of time and cost and, finally, that dimensional accuracy the mold suffers. It was also known to turn heated molds into an insulating material Immerse containing water bath and in this way an insulating coating form. Oxide deposits that occur during the casting of copper alloys should are reflected on this insulating cover and the next time they are immersed be washed off along with this. In fact, however, it cannot be avoided that residues of the cast metal settle on the mold wall. According to the Invention is therefore proposed that the molds in a relevant Cast material Bring dissolving lye bath and then rinse with water, z. B. cum or wash it off, preferably first with hot and then with cold water. as Lye is particularly suitable for technical caustic soda, depending on the type of solution to be dissolved Alloy is to be used in concentrated form or in a suitable dilution.

Das Verfahren nach der Erfindung bietet den Vorteil, daß alles Leichtmetall, z. B. Aluminium, das in Ritze, Risse, Poren oder in Luftnuten der Kokille eingedrungen ist, sauber herausgelöst wird, ohne daß die Maßhaltigkeit der Kokille geändert wird. Auch eine etwa vorhandene, auf die Kokille aufgetragene Schutzschicht wird sauber mit abgelöst. Das Verfahren nach der Erfindung läßt sich außerdem schneller und billiger durchführen als die bekannten Verfahren; die Formen stehen in kürzerer Zeit wieder gießfertig zur Verfügung. Weiter kann das neue Verfahren von nur angelernten Hilfskräften durchgeführt werden.The method according to the invention offers the advantage that all light metal, z. B. aluminum that has penetrated into cracks, cracks, pores or air grooves in the mold is, is removed cleanly without the dimensional accuracy of the mold is changed. Any protective layer applied to the mold is also clean replaced with. The method according to the invention can also be faster and Carry out cheaper than the known procedures; the forms are shorter Time ready to pour again. Next, the new process can only be learned from Assistants are carried out.

Claims (1)

PATENTANSPRUCH: Verfahren zum Reinigen von eisernen oder stählernen Kokillen für Leichtmetall-, z. B. Aluminiumguß durch Tauchen in ein Bad, dadurch gekennzeichnet, daß die Kokillen in ein den betreffenden Gußwerkstoff auflösendes Laugebad gebracht und anschließend mit Wasser abgespült, z. B. abgespritzt oder abgewaschen werden, vorzugsweise zunächst mit heißem und dann mit kaltem Wasser. ZurAbgrenzung des Erfindungsgegenstands vom Stand der Technik ist im Erteilungsverfahren folgende Druckschrift in Betracht gezogen worden: Deutsche Patentschrift Nr. 676 348.PATENT CLAIM: Process for cleaning iron or steel Molds for light metal, z. B. aluminum casting by immersion in a bath, thereby characterized in that the molds dissolve into a casting material in question Brought caustic bath and then rinsed with water, z. B. hosed or washed off, preferably first with hot and then with cold water. To delimit the subject matter of the invention from the state of the art, the granting procedure is in progress the following publication has been considered: German Patent No. 676 348.
DEB200798D 1942-12-29 1942-12-29 Process for cleaning molds Expired DE754487C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB200798D DE754487C (en) 1942-12-29 1942-12-29 Process for cleaning molds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB200798D DE754487C (en) 1942-12-29 1942-12-29 Process for cleaning molds

Publications (1)

Publication Number Publication Date
DE754487C true DE754487C (en) 1954-03-29

Family

ID=7012154

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB200798D Expired DE754487C (en) 1942-12-29 1942-12-29 Process for cleaning molds

Country Status (1)

Country Link
DE (1) DE754487C (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE676348C (en) * 1935-07-09 1939-06-02 Telefunken Gmbh Method for filling magnet systems of externally excited dynamic loudspeakers with a binding agent mixed with quartz

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE676348C (en) * 1935-07-09 1939-06-02 Telefunken Gmbh Method for filling magnet systems of externally excited dynamic loudspeakers with a binding agent mixed with quartz

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