DE364227C - Process for cleaning castings - Google Patents

Process for cleaning castings

Info

Publication number
DE364227C
DE364227C DEW60749D DEW0060749D DE364227C DE 364227 C DE364227 C DE 364227C DE W60749 D DEW60749 D DE W60749D DE W0060749 D DEW0060749 D DE W0060749D DE 364227 C DE364227 C DE 364227C
Authority
DE
Germany
Prior art keywords
castings
sand
cleaning
cleaning castings
sodium hydroxide
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
DEW60749D
Other languages
German (de)
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.)
DR FRITZ WUEST
Original Assignee
DR FRITZ WUEST
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 DR FRITZ WUEST filed Critical DR FRITZ WUEST
Priority to DEW60749D priority Critical patent/DE364227C/en
Application granted granted Critical
Publication of DE364227C publication Critical patent/DE364227C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/28—Cleaning or pickling metallic material with solutions or molten salts with molten salts

Description

Verfahren zum Putzen von Gußstücken. Der an den Gußstücken anhaftende Sand wird entweder auf mechanischem oder auf chemischem Wege entfernt. Ersteres Verfahren kommt im vorliegenden Falle nicht in Betracht.Process for cleaning castings. The one adhering to the castings Sand is removed either mechanically or chemically. The former Proceedings are not considered in the present case.

Wird bei der chemischen Reinigung verdünnte Schwefelsäure benutzt, so löst sie das Eisen auf und enfernt dadurch den angebrannten Sand von dem Eisen. Auf den Sand selbst ist die Schwefelsäure ohne Einwirkung.If diluted sulfuric acid is used for dry cleaning, so it dissolves the iron and thereby removes the burnt sand from the iron. The sulfuric acid has no effect on the sand itself.

Bei dem vorliegenden Verfahren werden die Gußstücke in geschmolzenes Natronhydrat gelegt, wodurch der Sand aufghöst und dadurch die Reinigung in kurzer Zeit vollzogen wird, ohne die harte Gußhaut anzugreifen.In the present process, the castings are melted Soda hydrate placed, which increases the sand and thus the cleaning in a short time Time is completed without attacking the hard cast skin.

Oder es werden die Gußstücke mit Natronlauge unter Druck behandelt, wobei dieselbe Wirkung eintritt. In beiden Fällen erhalten die Gußstücke eine tadellose äußere Beschaffenheit.Or the castings are treated with caustic soda under pressure, with the same effect. In both cases the castings are impeccable external nature.

Aus dem gebildeten Wasserglas wird die Natronlauge wieder zurückgewonnen. Bei der Behandlung mit Natronlauge unter Druck werden die zu reinigenden Gußstücke in ein Druckgefäß gebracht, welches z. B. von außen durch Feuergase oder von innen durch überhitzten Dampf geheizt werden kann. Nach dem Verschrauben des Verschlußdeckels wird der Druck auf etwa 5 bis 8 Atmosphären gebracht. Die Einwirkungsdauer zur Auflösung des Sandes ist je nach der Konzentration der Lauge und der Höhe des Druckes verschieden und ist dementsprechend zu bemessen. Nach Beendigung der Einwirkung läßt man den Inhalt erkalten, worauf die Gegenstände herausgenommen und zwecks Entfernung der anhaftenden Lauge abgespült werden.The sodium hydroxide solution is recovered from the water glass formed. The castings to be cleaned are treated with caustic soda under pressure placed in a pressure vessel, which z. B. from the outside by fire gases or from the inside can be heated by superheated steam. After screwing on the cap the pressure is brought to about 5 to 8 atmospheres. The duration of exposure to dissolution of the sand varies according to the concentration of the lye and the level of pressure and is to be measured accordingly. After the end of the action, the The contents cool, whereupon the objects are taken out and removed for the purpose of removing the adhering lye can be rinsed off.

Claims (1)

PATENT-ANsPRUcH: Verfahren zum Reinigen von Gußstücken; dadurch gekennzeichnet, daß der anhaftende Sand entweder durchgeschmolzenes Natronhydrat oder in Druckgefäßen durch Natronlauge in Lösung gebracht wird.PATENT CLAIM: Process for cleaning castings; characterized, that the adhering sand is either molten sodium hydroxide or in pressure vessels is brought into solution by sodium hydroxide solution.
DEW60749D 1922-03-18 1922-03-18 Process for cleaning castings Expired DE364227C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEW60749D DE364227C (en) 1922-03-18 1922-03-18 Process for cleaning castings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW60749D DE364227C (en) 1922-03-18 1922-03-18 Process for cleaning castings

Publications (1)

Publication Number Publication Date
DE364227C true DE364227C (en) 1922-11-18

Family

ID=7606104

Family Applications (1)

Application Number Title Priority Date Filing Date
DEW60749D Expired DE364227C (en) 1922-03-18 1922-03-18 Process for cleaning castings

Country Status (1)

Country Link
DE (1) DE364227C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK153527B (en) * 1975-06-30 1988-07-25 Ahlsell Ir Ab PROCEDURE FOR THE CUTTING OF CASTING SUBSTANCES OF SILICONE BOND FORM SAND, WHICH SHOULD CONTAIN SUBSTANCES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK153527B (en) * 1975-06-30 1988-07-25 Ahlsell Ir Ab PROCEDURE FOR THE CUTTING OF CASTING SUBSTANCES OF SILICONE BOND FORM SAND, WHICH SHOULD CONTAIN SUBSTANCES

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