DE289645C - - Google Patents

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Publication number
DE289645C
DE289645C DE1913289645D DE289645DA DE289645C DE 289645 C DE289645 C DE 289645C DE 1913289645 D DE1913289645 D DE 1913289645D DE 289645D A DE289645D A DE 289645DA DE 289645 C DE289645 C DE 289645C
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DE
Germany
Prior art keywords
bakelite
electrodes
percent
binder
temperature
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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
DE1913289645D
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German (de)
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Publication date
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Application granted granted Critical
Publication of DE289645C publication Critical patent/DE289645C/de
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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/36Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes condensation products of phenols with aldehydes or ketones
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B31/00Electric arc lamps
    • H05B31/02Details
    • H05B31/06Electrodes
    • H05B31/08Carbon electrodes
    • H05B31/10Cored carbon electrodes

Description

KAISERLÄKAISERLÄ

PATENTAMT.PATENT OFFICE.

Bei der Herstellung von für die verschiedensten elektrotechnischen Zwecke benutzten Elektroden, die nicht ausschließlich aus Metall bestehen, ist es üblich, als Ausgangsmaterial Kohle in irgendeiner Form, z. B. als amorphen Kohlenstoff (Ruß) oder Graphit, mit einem verkohlbaren Bindemittel, z. B. Teer oder Pech, zu verwenden. Außerdem können für die verschiedenen besonderen Zwecke, denenUsed in the manufacture of various electrotechnical purposes Electrodes that are not made entirely of metal are used as the starting material Coal in some form, e.g. B. as amorphous carbon (soot) or graphite, with a charring binders, e.g. B. tar or pitch to use. In addition, for the various special purposes that

ίο die Elektroden dienen sollen, noch irgendwelche Zusätze gemacht werden. Bei den für Beleuchtungszwecke bestimmten Effektkohlen werden z. B. noch die allgemein bekannten Leuchtzusätze zugesetzt.ίο the electrodes should serve, nor any Additions are made. With the effect carbons intended for lighting purposes are z. B. added the well-known lighting additives.

Elektroden nun, die aus den genannten Materialien bestehen, müssen nach der Formgebung während des Fabrikationsverfahrens einer hohen Temperatur unterworfen werden, damit das Bindemittel verkokt wird und so die Elektrode vor allem eine genügende Leitfähigkeit erhält. Die hierfür erforderliche Temperatur schwankt zwischen etwa 800 und 16000.Electrodes, which consist of the materials mentioned, have to be subjected to a high temperature after shaping during the manufacturing process so that the binding agent is coked and so the electrode above all has sufficient conductivity. The temperature required for this varies between about 800 and 1600 0 .

Der Brennprozeß erfordert aber große öfen, die natürlich sehr teuer im Betriebe sind. Zudem wird durch den Brennprozeß die ganze Fabrikation mehrere Tage aufgehalten.The firing process, however, requires large ovens, which are of course very expensive to operate. In addition, the entire production process is held up for several days by the firing process.

Die Erfindung betrifft nun ein Herstellungsverfahren, bei dem der erwähnte Brennprozeß fortfällt, oder bei dem nur eine Temperatur verwendet wird, die erheblich unter der bisher üblichen geringsten Temperatur von . etwa 800 ° liegt.The invention now relates to a manufacturing method in which the aforementioned firing process is omitted, or at which only a temperature is used which is considerably below the hitherto usual lowest temperature of. is about 800 °.

Es kann dies beispielsweise erreicht werden dadurch, daß erhärtende Bindemittel verwendet werden, die entweder selbst gut leiten oder in so geringen Mengen angewendet werden können, daß die Leitfähigkeit der Kohle nur wenig beeinträchtigt wird. Ein geeignetes Bindemittel dieser Art sind die löslichen Kondensationsprodukte von Formaldehyd und Phenolen, z. B. Bakelit. Es genügt schon eine ganz geringe Menge von 1 bis 2 Prozent Bakelit, um feste und widerstandsfähige Kohlen von hoher Leitfähigkeit zu erzielen. Bakelit wird in irgendeinem Lösungsmittel, z. B. in 10 Teilen Alkohol o. dgl., gelöst verwendet und mit den übrigen Massen innig gemengt. Die Elektroden können aus dieser Mischung entweder unter Druck in einer Form durch Zusammenpressen hergestellt werden oder nach dem bei Bogenlichtelektroden bekannten Spritzverfahren. This can be achieved, for example, by using hardening binders that either conduct themselves well or are used in such small amounts can that the conductivity of the coal is only slightly affected. A suitable one Binders of this type are the soluble condensation products of formaldehyde and Phenols, e.g. B. Bakelite. A very small amount of 1 to 2 percent is sufficient Bakelite to obtain solid and resistant coals of high conductivity. Bakelite is in any solvent, e.g. B. in 10 parts of alcohol o. The like., Used and dissolved intimately mixed with the rest of the masses. The electrodes can be made from this mixture either be produced under pressure in a mold by pressing together or by the injection process known from arc light electrodes.

Eine Bogenlichtelektrode mit Leuchtzusätzen kann beispielsweise hergestellt werden aus einer Mischung von etwa 60 Prozent Graphit (der sich für diesen Zweck besonders eignet), 38 Prozent Leuchtzusätzen und 2 Prozent Bakelit als Bindemittel. Die Elektrode wird nach dem Formen einfach getrocknet, gegebenenfalls bei etwas erhöhter Temperatur, und ist dann fertig.An arc light electrode with luminescent additives can be made from, for example a mixture of about 60 percent graphite (which is particularly suitable for this purpose), 38 percent luminescent additives and 2 percent Bakelite as a binding agent. The electrode will simply dried after molding, if necessary at a slightly elevated temperature, and is then done.

Durch dieses Verfahren wird die Herstellung außerordentlich vereinfacht, und die Endprodukte sind gleichmäßiger, als es sonst erzielbar ist.This process greatly simplifies production and the end products are more even than can otherwise be achieved.

Claims (3)

Patent-An Sprüche:Patent-to sayings: i. Verfahren zur Herstellung von Elektroden, die nicht ausschließlich aus Metall bestehen, dadurch gekennzeichnet, daß siei. Process for the production of electrodes, which do not consist exclusively of metal, characterized in that they mit Hilfe eines bei verhältnismäßig niedriger Temperatur erhärtenden Bindemittels geformt und hierauf durch einfaches Trocknen oder mäßiges Erhitzen fertiggemacht werden.with the aid of a binder that hardens at a relatively low temperature shaped and then made ready by simply drying or moderate heating will. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß als Bindemittel eine Bakelitiösung verwendet wird.2. The method according to claim i, characterized in that the binder is a Bakelite solution is used. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Menge des verwendeten Bakelits nicht mehr als 3 Prozent der gesamten Elektrodenmasse beträgt.3. The method according to claim 1, characterized in that the amount of used Bakelite is no more than 3 percent of the total electrode mass. gedruckt in der keichsdruckerei.printed in the keichsdruckerei.
DE1913289645D 1913-10-05 1913-10-05 Expired DE289645C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE289645T 1913-10-05

Publications (1)

Publication Number Publication Date
DE289645C true DE289645C (en) 1916-01-11

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ID=544658

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1913289645D Expired DE289645C (en) 1913-10-05 1913-10-05

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DE (1) DE289645C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1029475B (en) * 1953-10-12 1958-05-08 Union Carbide Corp Core mass for arc carbon electrodes
DE1646409B1 (en) * 1966-05-24 1970-10-15 Battery Corp Of America Process for the production of electrically conductive carbon cups

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1029475B (en) * 1953-10-12 1958-05-08 Union Carbide Corp Core mass for arc carbon electrodes
DE1646409B1 (en) * 1966-05-24 1970-10-15 Battery Corp Of America Process for the production of electrically conductive carbon cups

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