EP1481449A1 - Method for production of a multi-layer carbon brush - Google Patents

Method for production of a multi-layer carbon brush

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Publication number
EP1481449A1
EP1481449A1 EP03706598A EP03706598A EP1481449A1 EP 1481449 A1 EP1481449 A1 EP 1481449A1 EP 03706598 A EP03706598 A EP 03706598A EP 03706598 A EP03706598 A EP 03706598A EP 1481449 A1 EP1481449 A1 EP 1481449A1
Authority
EP
European Patent Office
Prior art keywords
carbon
layer
layers
mold
insulating material
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
EP03706598A
Other languages
German (de)
French (fr)
Other versions
EP1481449B1 (en
Inventor
Rainer Sperling
Martin Schwarzer
Rolf Heilmann
Bernd Rinn
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.)
Schunk Kohlenstofftechnik GmbH
Original Assignee
Schunk Kohlenstofftechnik GmbH
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Application filed by Schunk Kohlenstofftechnik GmbH filed Critical Schunk Kohlenstofftechnik GmbH
Publication of EP1481449A1 publication Critical patent/EP1481449A1/en
Application granted granted Critical
Publication of EP1481449B1 publication Critical patent/EP1481449B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/12—Manufacture of brushes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
    • H01R39/20—Contacts for co-operation with commutator or slip-ring, e.g. contact brush characterised by the material thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/46—Auxiliary means for improving current transfer, or for reducing or preventing sparking or arcing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49119—Brush

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Laminated Bodies (AREA)

Abstract

A method for production of a multi-layer carbon brush including at least two electrically-conducting functional layers made from carbon material and at least one insulation layer made from an electrically-insulating material, running between consecutive functional layers. According to the invention, the corresponding multi-layer carbon brushes and the layers with desired thickness can be produced by applying the carbon material and the electrically-insulating material in a mold in a sequence corresponding to the layer sequence of the multi-layer carbon brush for production in powder form, then pressed and finally heat-treated.

Description

Beschreibungdescription
Verfahren zur Herstellung einer Mehrschicht-KohlebürsteProcess for producing a multi-layer carbon brush
Die Erfindung bezieht sich auf ein Verfahren zur Herstellung einer Mehrschicht- Kohlebürste bestehend aus zumindest zwei ersten elektrisch leitenden Funktionsschichten aus Kohlenstoffmaterial und zumindest einer Isolierschicht aus elektrisch isolierendem Material, die zwischen aufeinanderfolgenden ersten Funktionsschichten verläuft.The invention relates to a method for producing a multilayer carbon brush consisting of at least two first electrically conductive functional layers made of carbon material and at least one insulating layer made of electrically insulating material, which runs between successive first functional layers.
Mehrschicht-Kohlebürsten, die aus Kohleriegeln und zwischen diesen verlaufenden Isolierschichten bestehen, werden häufig für kleinere reversierbare Motoren wie z. B. Waschmaschinenmotoren eingesetzt. Die Isolierschicht kann dabei aus einer Folie oder aus isolierendem Klebstoff bzw. synthetischem Harz, einem oder mehreren Pulverharzen bestehen. Durch den höheren Querwiderstand wird der Strom, der zwischen den beiden von der Kohlebürste überdeckten Lamellen eines Kommutators fließt, reduziert und somit die Kommutierung verbessert.Multi-layer carbon brushes, which consist of carbon bars and between these insulating layers, are often used for smaller reversible motors such. B. washing machine motors used. The insulating layer can consist of a film or of insulating adhesive or synthetic resin, one or more powder resins. The higher transverse resistance reduces the current that flows between the two lamellae of a commutator covered by the carbon brush, and thus improves commutation.
Die bekannten Mehrschicht-Kohlebürsten zuvor beschriebener Art werden üblicherweise derart hergestellt, dass zunächst temperaturbehandelte Kohlenstoffplatten zueinander ausgerichtet werden, um zwischen diesen sodann eine Folie einzubringen. Anschließend erfolgt eine mechanische Bearbeitung, eine Maßbearbeitung und Einbringen der Seile oder Litzen.The known multi-layer carbon brushes of the type described above are usually produced in such a way that temperature-treated carbon plates are first aligned with one another in order then to introduce a film between them. Subsequently there is mechanical processing, custom machining and the insertion of the ropes or strands.
Es sind auch als Mehrschicht-Kohlebürste bezeichnete Kohlebürsten bekannt, bei denen die Schichten jeweils elektrisch leitend sind, jedoch gegebenenfalls unterschiedliche mechanische Eigenschaften aufweisen. Eine entsprechende Kohlebürste ist dem DE 91 06 977 Ul zu entnehmen. Die verschiedenen Schichten - auch Zonen genannt -, die unterschiedliche Materialzusammensetzungen aufweisen, können dadurch ausgebildet werden, dass vor dem Pressen der Kohlebürsten nacheinander zwei Ausgangsschichten mit unterschiedlichen Materialzusammensetzungen in eine Pressform eingebracht und zusammen miteinander verpresst werden. Dabei kann eine Zone einen höheren Kupferanteil als die andere aufweisen.Carbon brushes are also known as multi-layer carbon brushes, in which the layers are each electrically conductive, but may have different mechanical properties. A corresponding carbon brush can be found in DE 91 06 977 Ul. The different layers, also called zones, which have different material compositions, can be formed in that, before the carbon brushes are pressed, two starting layers with different material compositions are successively introduced into a mold and pressed together. One zone can have a higher copper content than the other.
Eine als Vielschicht-Schleifkontakt bezeichnete Kohlebürste nach der DE 44 30 745 weist Schichten auf, die jeweils aus leitendem Pulver bestehen. Zur Herstellung des Vielschicht-Schleifkontaktes werden in eine Form gleichzeitig zwei leitende Pulver eingefüllt, um nach einem Kompressionsschritt eine Wärmebehandlung durchzuführen. Neben dem Ausbilden von Schichten durch gleichzeitiges Einbringen von Pulver in eine Form können zusätzlich Schichten dadurch ausgebildet werden, dass elektrisch leitendes Pulver nacheinander der Form zugeführt wird.A carbon brush called multi-layer sliding contact according to DE 44 30 745 has layers which each consist of conductive powder. To produce the multi-layer sliding contact, two conductive powders are poured into a mold at the same time in order to carry out a heat treatment after a compression step. In addition to the formation of layers by simultaneously introducing powder into a mold, layers can additionally be formed by successively supplying electrically conductive powder to the mold.
In der DE-C-835 428 wird ein hochglanzpolierter Steinkohleformkörper als kunstgewerblicher Gegenstand und ein Verfahren zu seiner Herstellung beschrieben. Hierzu wird in eine Pressform Kohle eingebracht, gepresst, zunächst vorgesintert und sodann spanabhebend bearbeitet, um vor dem Hochsintern den Körper mit öl- oder fetthaltigen Pasten zu überziehen bzw. zu tränken.DE-C-835 428 describes a high-gloss polished hard coal molding as an object of handicraft and a process for its production. For this purpose, coal is introduced into a press mold, pressed, first pre-sintered and then machined in order to coat or soak the body with pastes containing oil or fat before sintering.
Aus der DE-C-636 540 ist ein Verfahren zur Herstellung mehrschichtiger Kohlebürsten bekannt. Fertige Kohleschichten werden glatt geschliffen und zwischen zwei fertige Kohleschichten dickflüssiges Kunstharz mit Isolierstoff angeordnet, um sodann die Kohleschichten in einem geeigneten Presswerkzeug einzuspannen, um eine Trocknung in einem Ofen zu ermöglichen. Ein Verfahren zum Herstellen eines Schichtstoffes aus Kohlenstoff ist der DE 33 07 090 AI zu entnehmen. Zur Erzielung gewünschter Endkörper werden durch Pressen und Wärmebehandlung zwischen übereinander anordbaren Kohlenstoffschichten wie Koh- lestofffilzschichten Folien aus einem thermoplastischen Kunststoff angeordnet, um sodann gewünschten Drücken und Temperaturen ausgesetzt zu werden.DE-C-636 540 discloses a method for producing multilayer carbon brushes. Finished carbon layers are ground smooth and arranged between two finished carbon layers of viscous synthetic resin with insulating material, in order to then clamp the carbon layers in a suitable press tool to enable drying in an oven. A method for producing a laminate from carbon can be found in DE 33 07 090 AI. In order to achieve the desired end bodies, foils made of a thermoplastic are arranged by pressing and heat treatment between carbon layers that can be arranged one above the other, such as carbon felt layers, in order to then be exposed to the desired pressures and temperatures.
Die DE 199 02 938 AI bezieht sich auf eine Kohlebürste, die aus Abschnitten unterschiedlicher Stoffzusammensetzungen besteht. Die Kohlebürste wird dabei in einem Pressvorgang hergestellt.DE 199 02 938 AI relates to a carbon brush which consists of sections of different material compositions. The carbon brush is produced in one press process.
Der vorliegenden Erfindung liegt das Problem zu Grunde, ein Verfahren zur Herstellung einer Mehrschicht-Kohlebürste, die aus zumindest zwei elektrisch leitenden Funktionsschichten und zwischen aufeinanderfolgenden Funktionsschichten verlaufender Isolierschicht besteht, derart weiterzubilden, dass eine herstellungstechnische Vereinfachung erfolgt, wobei außerdem die Möglichkeit geschaffen werden soll, die Isolierschicht problemlos auf den Einsatzbereich der herzustellenden Mehrschicht-Kohlebürste auszulegen. Auch sollen Materialeigenschaften wie Porosität oder Reibwerte problemlos einstellbar sein. Ferner soll eine problemlose individuelle Auslegung der Dicken der Funktionsschichten ermöglicht werden, ohne dass aufwendige Bearbeitungsmaßnahmen erforderlich sind.The present invention is based on the problem of further developing a method for producing a multi-layer carbon brush, which consists of at least two electrically conductive functional layers and an insulating layer running between successive functional layers, in such a way that manufacturing simplification takes place, the possibility also being created, to design the insulating layer without problems for the area of application of the multi-layer carbon brush to be produced. Material properties such as porosity or friction values should also be easily adjustable. Furthermore, a problem-free individual design of the thicknesses of the functional layers is to be made possible without the need for complex processing measures.
Erfindungsgemäß wird das Problem im Wesentlichen dadurch gelöst, dass schichtweise das Kohlenstoffmaterial oder dieses als Füllstoff enthaltendes Material und das elektrisch isolierende Material in Schichtverlauf der herzustellenden Mehrschicht- Kohlebürste entsprechender Reihenfolge jeweils in Pulverform in eine Form eingebracht, sodann gepresst und anschließend wärmebehandelt werden. Dabei sollte das isolierende Material mit einer jeweiligen Schichthöhe in die Form eingebracht werden, dass die Isolierschicht in der fertigen Mehrschicht-Kohlebürste eine Dicke d mit vorzugsweise 100 μm < d < 500 μ aufweist. Insbesondere zeichnet sich die Erfindung durch ein Verfahren zur Herstellung von Mehrschicht-Kohlebürsten jeweils bestehend aus zumindest zwei elektrisch leitenden Funktionsschichten aus Kohlenstoffmaterial und zumindest einer Isolierschicht aus elektrisch isolierendem Material, die zwischen aufeinanderfolgenden Funktionsschichten verläuft, durch die Verfahrensschritte aus:According to the invention, the problem is essentially solved in that the carbon material or the material containing this as filler and the electrically insulating material are introduced in powder form into a mold in the course of the layers of the multilayer carbon brush to be produced, then pressed and then heat-treated. The insulating material should be introduced into the mold with a respective layer height in such a way that the insulating layer in the finished multilayer carbon brush has a thickness d of preferably 100 μm <d <500 μ. In particular, the invention is characterized by a method for producing multilayer carbon brushes, each consisting of at least two electrically conductive functional layers made of carbon material and at least one insulating layer made of electrically insulating material, which runs between successive functional layers, by the method steps:
- Herstellen einer Platte durch Einfüllen von herzustellenden Mehrschicht- Kohlebürsten entsprechenden Schichten aus Kohlenstoffmaterial oder dieses als Füllstoff enthaltendem Material jeweils in Pulverform und elektrisch isolierendem Material in Pulverform oder als Folie in eine Form,Manufacture of a plate by filling multilayer carbon brushes to be produced with layers of carbon material or material containing this as filler in powder form and electrically insulating material in powder form or as a film in a mold,
- Pressen der in der Form vorhandenen Schichten zu der Platte, Wärmebehandlung der Platte undPressing the layers present in the mold to the plate, heat treating the plate and
Teilen der Platte in den Mehrschicht-Kohlebürsten entsprechende oder endkontur- nahe Größen.Parts of the plate in the multi-layer carbon brushes have appropriate or near-net shape sizes.
Die Maßbearbeitung und das Einsetzen der Litze bzw. des Seils erfolgt in bekannter Weise.The dimensional processing and the insertion of the strand or the rope is carried out in a known manner.
Durch die erfϊndungsgemäße Lehre bedarf es bei der Herstellung des Massenartikels Schichtkohlebürste nur noch eines Wärmebehandlungsschrittes, um eine Vielzahl von Mehrschicht-Kohlebürsten herzustellen. Demgegenüber werden nach dem Stand der Technik entweder die aus Kohlenstoff bestehenden Platten getrennt voneinander hergestellt oder aber Kohlebürsten, die aus mehreren Schichten mit elektrisch leitenden Eigenschaften bestehen, werden, sofern die Ausgangsmaterialien zunächst in einer Form eingegeben werden, jeweils einzeln hergestellt.Due to the teaching according to the invention, only one heat treatment step is required in the manufacture of the mass article laminated carbon brush to produce a multitude of multilayer carbon brushes. In contrast, according to the prior art, either the plates consisting of carbon are produced separately from one another, or carbon brushes which consist of several layers with electrically conductive properties are, if the starting materials are first input in a form, manufactured individually.
Insbesondere wird vorgeschlagen, dass als elektrisch isolierendes Material synthetisches Harzpulver, organische oder anorganische Isolationsfolie wie Al O3-Folie, eine oder mehrere Pulverharze wie Phenol- oder Epoxydharze, Gewebefolie, Fasermatte, selbstklebende oder kleberaktivierte Folien oder Kombinationen dieser verwendet werden. Als bevorzugte Materialzusammensetzungen für die herzustellenden Mehrschicht- Kohlebürsten bzw. die Platten, aus denen erstere gewonnen werden, sind zu nennen: in etwa 50 Gew.-% Naturgraphit, in etwa 50 Gew.-% synthetischer Graphit, in etwa 25 Gew.-% Phenol- oder Epoxyd- oder Thermoplastharz in Pulverform, bis in etwa 40 Gew.-% Steinkohleteerpech, wobei letztere auf 100 Gew.-% Füllstoff, also Naturgraphit und synthetischen Graphit bezogen sind.In particular, it is proposed that synthetic resin powder, organic or inorganic insulating film such as Al O 3 film, one or more powder resins such as phenolic or epoxy resins, fabric film, fiber mat, self-adhesive or adhesive-activated films or combinations thereof be used as the electrically insulating material. The preferred material compositions for the multilayer carbon brushes to be produced or the plates from which the former are obtained are: approximately 50% by weight natural graphite, approximately 50% by weight synthetic graphite, approximately 25% by weight Phenolic or epoxy or thermoplastic resin in powder form, up to about 40% by weight of coal tar pitch, the latter being based on 100% by weight of filler, that is to say natural graphite and synthetic graphite.
Die entsprechende Zusammensetzung in Pulverform wird sodann in gewünschtem Umfang schichtweise und durch das elektrisch isolierende Material getrennt in eine Pressform eingebracht und nach dem Pressen entweder ausgehärtet z. B. über in etwa 15 h bis zu einer Temperatur Tj von in etwa bis 200 °C oder geglüht bis zu einer Endtemperatur T2 von in etwa bis 600 °C.The corresponding composition in powder form is then introduced to the desired extent in layers and separated by the electrically insulating material into a press mold and either cured after pressing, for. B. over in about 15 h to a temperature Tj of about to 200 ° C or annealed to a final temperature T 2 of about to 600 ° C.
Weitere Einzelheiten, Vorteile und Merkmale der Erfindung ergeben sich nicht nur aus den Ansprüchen, den diesen zu entnehmenden Merkmalen -für sich und/oder in Kombination-, sondern auch aus der nachfolgenden Beschreibung von der Zeichnung zu entnehmenden bevorzugten Ausfuhrungsbeispielen.Further details, advantages and features of the invention result not only from the claims, the features to be extracted from them - individually and / or in combination - but also from the following description of preferred exemplary embodiments to be taken from the drawing.
Es zeigen:Show it:
Fig. 1 eine Prinzipdarstellung einer Mehrschicht-Kohlebürste mit drei Funktionsschichten,1 is a schematic diagram of a multi-layer carbon brush with three functional layers,
Fig. 2 einen Teil der Kohlebürste nach Fig. 1 ,2 shows part of the carbon brush according to FIG. 1,
Fig. 3 eine Prinzipdarstellung einer Form zur Herstellung von Platten undFig. 3 is a schematic diagram of a mold for the production of plates and
Fig. 4 Mehrschicht-Platten zur Herstellung von Mehrschicht-Kohlebürsten.Fig. 4 multilayer plates for the production of multilayer carbon brushes.
Die Erfindung bezieht sich auf ein Verfahren zur Herstellung einer Mehrschicht- Kohlebürste. Unter Mehrschicht-Kohlebürste wird dabei eine solche verstanden, bei der zwischen aus elektrisch leitendem Material bestehenden Funktionsschichten aus Koh- lenstoffmaterial oder dieses enthaltend - auch Kohleriegel genannt - eine Isolierschicht verläuft. Dabei umfasst die erfindungsgemäße Lehre die Herstellung von Mehrschicht- Kohlebürsten mit zwei oder mehr Funktionsschichten.The invention relates to a method for producing a multi-layer carbon brush. A multilayer carbon brush is understood to mean one in which carbon layers between functional layers made of electrically conductive material lenstoffmaterial or containing this - also called carbon bar - runs an insulating layer. The teaching according to the invention comprises the production of multi-layer carbon brushes with two or more functional layers.
In Fig. 1 ist rein prinzipiell eine Mehrschicht-Kohlebürste 10 mit drei Kohleriegeln 12, 14, 16 dargestellt, die gegeneinander über Isolierschichten 18 elektrisch isoliert sind.1 shows, in principle, a multi-layer carbon brush 10 with three carbon bars 12, 14, 16, which are electrically insulated from one another via insulating layers 18.
Die Kohleriegel 12, 14, 16 sowie die Isolierschichten 18 verlaufen senkrecht zur Lauffläche 20 der Kohlebürste. Von der Lauffläche 20 gegenüberliegender Fläche 22 geht ein Stampfkontakt 24 mit Seil bzw. Litze 26 aus. Insoweit wird jedoch auf hinlänglich bekannte Bauarten von Mehrschicht-Kohlebürsten zuvor beschriebener Art verwiesen.The carbon bars 12, 14, 16 and the insulating layers 18 run perpendicular to the tread 20 of the carbon brush. A tamped contact 24 with a rope or strand 26 extends from the tread 20 on the opposite surface 22. In this respect, however, reference is made to well-known types of multi-layer carbon brushes of the type described above.
Zur Herstellung von Mehrschicht-Kohlebürsten wird erfindungsgemäß vorgeschlagen, dass die die einzelnen Schichten 12, 14, 16, 18 bildenden Materialien nacheinander in der gewünschten Schichtreihenfolge in ein Gesenk 28 einer Pressvorrichtung 30 eingebracht werden. In dem Gesenk 28 ist ein Stempel 32 verstellbar angeordnet, um im gewünschten Umfang das Gesenk 28 mit verschiedenen Materialien zu füllen. Nach dem Einfüllen des jeweiligen eine Schicht bildenden Materials wird mittels eines Schiebers 34 überschüssiges Material entfernt. Nachdem in das Gesenk 28 schichtweise die gewünschten Materialien einerseits aus Kohlenstoff und andererseits aus elektrisch isolierendem Material eingebracht worden sind, erfolgt im Ausfuhrungsbeispiel über einen Stempel 36 ein Verpressen der Schichten. Dabei ist erfindungsgemäß vorgesehen, dass der Querschnitt des Gesenks 28 derart ist, dass sich eine Mehrschichtplatte 38 ergibt, die nach Entfernen aus dem Gesenk 28 und Wärmebehandlung in gewohnter Weise in Abschnitte 40, 42, 44 unterteilt wird, deren Abmessungen denen der herzustellenden Mehrschicht-Kohlebürsten entsprechen. Sodann erfolgt eine Maßbearbeitung der Abschnitte 40, 42, 44 und Einsetzen des Seils in gewohnter Weise.For the production of multi-layer carbon brushes, it is proposed according to the invention that the materials forming the individual layers 12, 14, 16, 18 are successively introduced into a die 28 of a pressing device 30 in the desired layer sequence. A punch 32 is adjustably arranged in the die 28 in order to fill the die 28 with various materials to the desired extent. After the respective material forming a layer has been filled in, excess material is removed by means of a slide 34. After the desired materials on the one hand made of carbon and on the other hand made of electrically insulating material have been introduced into the die 28 in layers, the layers are pressed in the exemplary embodiment by means of a stamp 36. It is provided according to the invention that the cross section of the die 28 is such that a multilayer plate 38 results which, after removal from the die 28 and heat treatment, is divided in the usual way into sections 40, 42, 44, the dimensions of which correspond to those of the multilayer to be produced. Carbon brushes. The sections 40, 42, 44 are then custom-machined and the rope is inserted in the usual manner.
Die in Fig. 4 dargestellte Platte 38 besteht aus den aus Kohlenstoffmaterial bestehenden Funktionsschichten 46, 48, zwischen denen die aus elektrisch isolierendem Material bestehende Schicht 50 verläuft. Wird die Isolierschicht 18, 50 vorzugsweise durch Pressen von Pulvermaterialien gewonnen, so besteht auch die Möglichkeit, zwischen den einzelnen aus Kohlenstoffmaterial bestehenden Schichten eine Folie aus elektrisch isolierendem Material anzuordnen, die zusammen mit dem Kohlenstoffmaterial oder dieses enthaltend in dem Gesenk 28 verpresst wird.The plate 38 shown in FIG. 4 consists of the functional layers 46, 48 made of carbon material, between which the layer 50 made of electrically insulating material runs. If the insulating layer 18, 50 is preferably obtained by pressing powder materials, it is also possible to arrange a film of electrically insulating material between the individual layers consisting of carbon material, which film is pressed together with the carbon material or containing it in the die 28.
Bei dem Einsatz von Folien kommen in Frage: anorganische oder organische Folien wie z.B. Al2O -Folie, Gewebefolien oder Fasermatten, selbstklebende oder kleberaktivierte Folien. Dabei müssen die Folien gegebenenfalls aktiviert werden.When using foils, the following can be considered: inorganic or organic foils such as Al 2 O foil, fabric foils or fiber mats, self-adhesive or adhesive-activated foils. The films may need to be activated.
Durch die erfindungsgemäße Lehre besteht die Möglichkeit, auf einfache Weise Mehrschicht-Kohlebürsten herzustellen, bei denen Isolierschichten gewünschte Dicken aufweisen. Hierzu ist es nur erforderlich, im gewünschten Umfang in die Pressform 30 Isolierschichtmaterial gewünschter Höhe einzufüllen. Dabei sollten jedoch in einem Umfang Isoliermaterial eingefüllt werden, das nach Verpressen der Materialien die Isolierschicht eine Dicke zwischen 100 μm und 500 μm aufweist.The teaching according to the invention makes it possible to produce multilayer carbon brushes in a simple manner, in which insulating layers have desired thicknesses. To do this, it is only necessary to fill insulating mold material of the desired height into the mold 30 to the desired extent. In this case, however, insulating material should be filled in to an extent that, after the materials have been pressed together, the insulating layer has a thickness between 100 μm and 500 μm.
Unabhängig hiervon können durch z. B. Füllgrad oder Pressparameter gewünschte Materialeigenschaften der einzelnen Schichten wie Porosität problemlos eingestellt werden. Regardless of this, z. B. filling level or pressing parameters desired material properties of the individual layers such as porosity can be set easily.

Claims

PatentansprücheVerfahren zur Herstellung einer Mehrschicht-Kohlebϋrste Process for producing a multi-layer carbon brush
1. Verfahren zur Herstellung einer Mehrschicht-Kohlebürste (10) bestehend aus zumindest zwei elektrisch leitenden Funktionsschichten (12, 14, 16) aus Kohlenstoffmaterial und zumindest einer Isolierschicht (18) aus elektrisch isolierendem Material, die zwischen aufeinanderfolgenden Funktionsschichten verläuft, d ad u rc h ge k enn ze i ch n e t, dass schichtweise das Kohlenstoffmaterial oder dieses als Füllstoff enthaltendes Material und das elektrisch isolierende Material in Schichtverlauf der herzustellenden Mehrschicht-Kohlebürste (10) entsprechender Reihenfolge jeweils in Pulverform in eine Form (28) eingebracht, sodann gepresst und anschließend wärmebehandelt werden.1. A method for producing a multi-layer carbon brush (10) consisting of at least two electrically conductive functional layers (12, 14, 16) made of carbon material and at least one insulating layer (18) made of electrically insulating material, which runs between successive functional layers, d ad u rc It is known that the carbon material or the material containing this as a filler and the electrically insulating material are introduced in layers into the form of the multilayer carbon brush (10) to be produced, each in powder form in a mold (28), then pressed and then heat treated.
2. Verfahren nach Anspruch 1, d adurc h gekennze i chnet, dass das isolierende Material mit einer jeweiligen Schichthöhe in die Form (28) eingebracht wird, dass die Isolierschicht in der fertigen Mehrschicht-Kohlebürste (10) eine Dicke d mit vorzugsweise 100 μm < d < 500 μm aufweist.2. The method according to claim 1, characterized by the fact that the insulating material is introduced into the mold (28) with a respective layer height, that the insulating layer in the finished multilayer carbon brush (10) has a thickness d of preferably 100 μm <d <500 μm.
3. Verfahren zur Herstellung von Mehrschicht-Kohlebürsten bestehend jeweils aus zumindest zwei elektrisch leitenden Funktionsschichten (46, 48) aus Kohlenstoffmaterial und zumindest einer Isolierschicht (50) aus elektrisch isolierendem Material, die zwischen aufeinanderfolgenden ersten Funktionsschichten verläuft, gekennzeichnet durch die Verfahrensschritte:3. A method for producing multilayer carbon brushes each consisting of at least two electrically conductive functional layers (46, 48) made of carbon material and at least one insulating layer (50) made of electrically insulating material, which runs between successive first functional layers, characterized by the method steps:
- Herstellen einer Platte (38) durch Einfüllen von herzustellenden Mehrschicht- Kohlebürsten entsprechenden Schichten aus Kohlenstoffmaterial oder dieses als Füllstoff enthaltendem Material jeweils in Pulverform und elektrisch isolierendem Material in Pulverform oder als Folie in eine Form (28),- Manufacture of a plate (38) by filling multilayer carbon brushes to be produced corresponding layers of carbon material or this as filler-containing material in powder form and electrically insulating material in powder form or as film in a mold (28),
- Pressen der in der Form vorhandenen Schichten zu der Platte (38),Pressing the layers present in the mold to the plate (38),
- Wärmebehandeln der Platte (38) und- Heat treating the plate (38) and
- Teilen der Platte in den Mehrschicht-Kohlebürsten entsprechende oder end- konturnahe Größen.- Divide the plate in the multi-layer carbon brushes to appropriate or near-net shape sizes.
4. Verfahren nach Anspruch 3, d a d u rch g ek enn ze i ch n et, dass als elektrisch isolierendes Material synthetisches Harzpulver, organische oder anorganische Isolationsfolie wie Al2θ3-Folie, eine oder mehrere Pulverharze wie Phenol- oder Epoxydharze, Gewebefolie, Fasermatte, selbstklebende oder kleberaktivierte Folien oder Kombinationen dieser verwendet werden.4. The method according to claim 3, so that synthetic resin powder, organic or inorganic insulating film, such as Al 2 θ 3 film, one or more powder resins, such as phenolic or epoxy resins, fabric film, are used as the electrically insulating material. Fiber mat, self-adhesive or adhesive-activated foils or combinations of these can be used.
5. Verfahren nach Anspruch 3, d a d u rch g ek enn ze i chn e t, dass als elektrisch leitendes Ausgangsmaterial für die elektrisch leitende Funktionsschicht Naturgraphit, synthetisches Graphit sowie Harz wie Phenolharz und/oder Pech verwendet werden.5. The method of claim 3, d a d u rch g ek enn ze i chn e t that natural graphite, synthetic graphite and resin such as phenolic resin and / or pitch are used as the electrically conductive starting material for the electrically conductive functional layer.
6. Verfahren nach einem der Ansprüche 3-5, d adurch gekennze i chn et, dass als Ausgangsmaterial in etwa 50 Gew.-% Naturgraphit und in etwa 50 Gew.-% synthetisches Graphit sowie in etwa 25 Gew.-% Harz wie Phenolharz oder in etwa 40 Gew.-% Pech verwendet werden, wobei sich das Harz bzw. das Pech auf 100 Gew.-% Füllstoff in Form des Naturgraphits und des synthetischen Graphits beziehen. 6. The method according to any one of claims 3-5, characterized by the fact that the starting material is about 50% by weight of natural graphite and about 50% by weight of synthetic graphite and about 25% by weight of resin such as phenolic resin or about 40% by weight of pitch, the resin or pitch relating to 100% by weight of filler in the form of natural graphite and synthetic graphite.
EP03706598A 2002-03-04 2003-03-03 Method for production of a multi-layer carbon brush Expired - Lifetime EP1481449B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10209199A DE10209199A1 (en) 2002-03-04 2002-03-04 Process for producing a multi-layer carbon brush
DE10209199 2002-03-04
PCT/EP2003/002137 WO2003075417A1 (en) 2002-03-04 2003-03-03 Method for production of a multi-layer carbon brush

Publications (2)

Publication Number Publication Date
EP1481449A1 true EP1481449A1 (en) 2004-12-01
EP1481449B1 EP1481449B1 (en) 2007-08-15

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US (1) US7308759B2 (en)
EP (1) EP1481449B1 (en)
JP (1) JP2005519444A (en)
KR (1) KR100928851B1 (en)
CN (1) CN100477415C (en)
AT (1) ATE370536T1 (en)
AU (1) AU2003208783A1 (en)
DE (2) DE10209199A1 (en)
WO (1) WO2003075417A1 (en)

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CN107634425A (en) * 2016-07-19 2018-01-26 苏州东翔碳素有限公司 A kind of method by suspension impregnation to brush contact susface
CN107634418A (en) * 2016-07-19 2018-01-26 苏州东翔碳素有限公司 A kind of suspension for being used to be impregnated on brush contact susface
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JP2005519444A (en) 2005-06-30
CN100477415C (en) 2009-04-08
AU2003208783A1 (en) 2003-09-16
CN1639925A (en) 2005-07-13
ATE370536T1 (en) 2007-09-15
US7308759B2 (en) 2007-12-18
KR20040104477A (en) 2004-12-10
DE10209199A1 (en) 2003-10-02
WO2003075417A1 (en) 2003-09-12
EP1481449B1 (en) 2007-08-15
US20050223538A1 (en) 2005-10-13
DE50307958D1 (en) 2007-09-27
KR100928851B1 (en) 2009-11-30

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