DE1030412B - By means of heat-resistant synthetic resin or lacquer coatings, in particular with silicone coatings, insulated wire made of copper or copper alloys and processes for its production - Google Patents
By means of heat-resistant synthetic resin or lacquer coatings, in particular with silicone coatings, insulated wire made of copper or copper alloys and processes for its productionInfo
- Publication number
- DE1030412B DE1030412B DED21474A DED0021474A DE1030412B DE 1030412 B DE1030412 B DE 1030412B DE D21474 A DED21474 A DE D21474A DE D0021474 A DED0021474 A DE D0021474A DE 1030412 B DE1030412 B DE 1030412B
- Authority
- DE
- Germany
- Prior art keywords
- copper
- coatings
- wire
- heat
- synthetic resin
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/10—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances metallic oxides
- H01B3/105—Wires with oxides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Processes Specially Adapted For Manufacturing Cables (AREA)
- Chemical Treatment Of Metals (AREA)
- Paints Or Removers (AREA)
Description
Mittels wärmebeständiger Kunstharz-oder Lacküberzüge, insbesondere mit Silikonüberzügen, isolierter Draht aus Kupfer oder Kupferlegierungen und Verfahren zu seiner Herstellung Die Erfindung betrifft einen mit isolierenden Überzügen versehenen Draht aus Kupfer oder Kupferlegierungen für elektrische Zwecke, bei dem zwischen dem eigentlichen isolierenden Überzug und dem metallischen Draht noch eine Zwischenschicht angeordnet ist, sowie ein Verfahren zur Herstellung derartiger Drähte.By means of heat-resistant synthetic resin or lacquer coatings, in particular with silicone coatings, insulated wire made of copper or copper alloys and processes for its manufacture The invention relates to one provided with insulating coatings Wire made of copper or copper alloys for electrical purposes, in which between an intermediate layer between the actual insulating coating and the metallic wire is arranged, as well as a method for producing such wires.
Für die Isolierung voll Drähten aus Kupfer oder Kupferlegierungen benutzt man Kunstharze oder Lacküberzüge der verschiedensten Art, die im allgemeinen eine besonders hohe Temperaturbeanspruchung der Drähte nicht zulassen. Die Frage des Isoliermaterials hat ihre besondere Bedeutung für die Ausstattung von elektrischen Maschinen, deren Belastbarkeit ganz wesentlich davon abhängt, wie hoch die Temperaturen in den Wicklungen ansteigen können, ohne daß Betriebsstörungen oder Beschädigungen auftreten. Man hat bisher für die Wicklungen dieser Maschinen Drähte benutzt, die mit Schellack isoliert waren. Jedoch war diese Art Isolation außerordentlich empfindlich gegen in der Wicklung auftretende Temperaturerhöhungen. Seit der Schaffung wärmebeständiger Kunststoffe ist man bestrebt, die Schellackisolierung durch eine solche aus Silikonlack zu ersetzen, da Isolationsüberzüge aus Silikon eine Erhitzung bis zu 200° C ohne tiefgreifende Zerstörungen vertragen. Es hat sich aber gezeigt, daß derartige Überzüge bei den genannten Temperaturen nicht genügend fest und beständig haften, da bereits eine Verzunderung der Kupferoberfläche eintritt, durch die der Überzug abgehoben oder aufgelockert wird.For the insulation of full wires made of copper or copper alloys one uses synthetic resins or varnish coatings of various kinds, which in general Do not allow the wires to be exposed to particularly high temperatures. The question the insulating material has its special meaning for the equipment of electrical Machines whose resilience depends to a large extent on how high the temperatures are can increase in the windings without operational disruptions or damage appear. Up to now, wires have been used for the windings of these machines were insulated with shellac. However, this type of isolation was extremely delicate against temperature increases occurring in the winding. Since the creation of heat-resistant Plastics, efforts are made to replace the shellac insulation with one made of silicone varnish to be replaced, since insulation coatings made of silicone can be heated up to 200 ° C without tolerate profound destruction. But it has been shown that such coatings do not adhere sufficiently firmly and consistently at the temperatures mentioned, as they already do a scaling of the copper surface occurs, through which the coating is lifted off or loosened up.
Auch hat man schon wäßrige Lösungen. die organische Bindemittel und Wasserglas enthalten, auf zu isolierende Metalloberflächen aufgebracht. Derartige Überzüge bieten aber keinen dichten und einwandfreien Schutz, insbesondere bei höheren Temperaturen, vermutlich infolge unkontrollierbarer Porenbildung durch die organische Substanz.You also already have aqueous solutions. the organic binders and Contain water glass, applied to metal surfaces to be isolated. Such However, coatings do not offer tight and perfect protection, especially with higher ones Temperatures, presumably as a result of uncontrollable pore formation by the organic Substance.
Man hat zwar bereits versucht, durch Zwischenschichten von Cadmium oder Chrom zu einer zunderfesten Oberfläche zu gelangen, doch die dünnen, meist elektrolytisch aufgebrachten Überzüge genügen durchaus nicht immer den gestellten Anforderungen und unterstützen die isolierende Wirkung des Silikonharzüberzugs in keiner Weise.Attempts have already been made to use intermediate layers of cadmium or chrome to achieve a non-scaling surface, but the thin ones, mostly Electrolytically applied coatings are by no means always sufficient for the provided ones Requirements and support the insulating effect of the silicone resin coating in no way.
Zur Überwindung der erwähnten Nachteile weist ein mit wärmebeständigen Kunstharz- oder Lacküberzügen, insbesondere mit Silikonüberzügen, isolierter elektrischer Draht aus Kupfer oder kupferreichen Legierungen gemäß der Erfindung zwischen der Kupferoberfläche .und dem isolierenden Überzug eine dünne, aus Siliziumdioxyd bestehende Zwischenschicht auf.To overcome the disadvantages mentioned has a with heat-resistant Synthetic resin or lacquer coatings, in particular with silicone coatings, insulated electrical Wire made of copper or copper-rich alloys according to the invention between the Copper surface .und the insulating coating a thin, consisting of silicon dioxide Intermediate layer on.
Zur Herstellung der erfindungsgemäßen Drähte wird so verfahren, daß der Kupferdraht mit einer Lösung von Alkalisilikat behandelt wird, deren Dichte 1,2 g/ccm und weniger beträgt. Der dünne und gleichmäßige Flüssigkeitsüberzug wird sodann durch Trocknen des Drahtes bei Temperaturen bis 220° C, zweckmäßig an Luft, verfestigt, worauf das Isoliermittel, im vorliegenden Fall also ein Silikonlack, aufgebracht werden kann. Zu einer besonders guten Haftung der Schicht gelangt man dabei, wenn man den Draht vor der Behandlung mit der Silikatlösung an Luft kurzzeitig auf Temperaturen bis zu 200° C erwärmt.To produce the wires according to the invention, the procedure is such that the copper wire is treated with a solution of alkali silicate, its density 1.2 g / cc and less. The thin and even coating of liquid becomes then by drying the wire at temperatures up to 220 ° C, expediently in air, solidifies, whereupon the insulating agent, in this case a silicone varnish, can be applied. A particularly good adhesion of the layer is achieved when the wire is briefly exposed to air before treatment with the silicate solution heated to temperatures up to 200 ° C.
Nach einer anderen Ausführungsform wird die Haftung der Zwischenschicht auf dem Draht dadurch verbessert, daß in diese zusätzlich zu dem Siliciumdioxyd noch Schwermetallverbindungen eingebaut werden, etwa in der Weise, daß der Draht mit Alkalisilikatlösungen behandelt wird, die lösliche Schwermetallverbindungen in untergeordneter Menge enthalten. Günstige Ergebnisse erhält man, wenn die Schwermetallzusätze in Form von Ammoniummetallkomplexverbindungen, z. B. Ceriammonnitrat, Kupfertetraminchlorid od. dgl., zur Anwendung gelangen oder wenn den Lösungen Ammoniak zugesetzt wird.According to another embodiment, the adhesion of the intermediate layer on the wire by being in this in addition to the silica heavy metal compounds are built in, for example in such a way that the wire treated with alkali silicate solutions, the soluble heavy metal compounds contained in minor quantities. Favorable results are obtained when the heavy metal additives in the form of ammonium metal complex compounds, e.g. B. cerium ammonium nitrate, copper tetramine chloride Or. The like., Used or when ammonia is added to the solutions.
Die Aufbringung der Schichten aus den erwähnten Lösungen kann in beliebiger Weise erfolgen. Besonders bewährt hat sich ein durchlaufendes Verfahren, bei dem der Draht von einer Spule durch ein die Silikatlösung, gegebenenfalls mit Zusätzen an Schwermetallverbindungen, enthaltendes Bad kontinuierlich hindurchgezogen wird. Drähte gemäß der Erfindung, die nach dem beschriebenen Verfahren mit einer Zwischenschicht versehen sind, sind außerordentlich zunderfest und können ohne wesentliche Veränderung der Kupferoberfläche auf Temperaturen bis zu 400° C erhitzt werden. Die Silikatschicht stellt einen ausgezeichneten Haftgrund für Isolationsüberzüge aus hitzebeständigen Lacken oder Harzen dar.The layers from the solutions mentioned can be applied in any desired manner Way. A continuous process in which the wire from a spool through a silicate solution, optionally with additives of heavy metal compounds, containing bath continuously pulled through will. Wires according to the invention, which according to the method described with a Interlayer are provided, are extremely resistant to scale and can be used without essential Changes in the copper surface can be heated to temperatures of up to 400 ° C. The silicate layer provides an excellent primer for insulation coatings made of heat-resistant paints or resins.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED21474A DE1030412B (en) | 1955-10-12 | 1955-10-12 | By means of heat-resistant synthetic resin or lacquer coatings, in particular with silicone coatings, insulated wire made of copper or copper alloys and processes for its production |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED21474A DE1030412B (en) | 1955-10-12 | 1955-10-12 | By means of heat-resistant synthetic resin or lacquer coatings, in particular with silicone coatings, insulated wire made of copper or copper alloys and processes for its production |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1030412B true DE1030412B (en) | 1958-05-22 |
Family
ID=7037097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DED21474A Pending DE1030412B (en) | 1955-10-12 | 1955-10-12 | By means of heat-resistant synthetic resin or lacquer coatings, in particular with silicone coatings, insulated wire made of copper or copper alloys and processes for its production |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1030412B (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE715147C (en) * | 1934-07-11 | 1942-01-22 | Siemens Ag | Enamelled wire |
FR940375A (en) * | 1946-03-29 | 1948-12-10 | Thomson Houston Comp Francaise | Electric conductors |
-
1955
- 1955-10-12 DE DED21474A patent/DE1030412B/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE715147C (en) * | 1934-07-11 | 1942-01-22 | Siemens Ag | Enamelled wire |
FR940375A (en) * | 1946-03-29 | 1948-12-10 | Thomson Houston Comp Francaise | Electric conductors |
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