EP1715962A2 - Arrangement and method for coating a thread-type material with paint in a multi-layer manner - Google Patents

Arrangement and method for coating a thread-type material with paint in a multi-layer manner

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Publication number
EP1715962A2
EP1715962A2 EP05715358A EP05715358A EP1715962A2 EP 1715962 A2 EP1715962 A2 EP 1715962A2 EP 05715358 A EP05715358 A EP 05715358A EP 05715358 A EP05715358 A EP 05715358A EP 1715962 A2 EP1715962 A2 EP 1715962A2
Authority
EP
European Patent Office
Prior art keywords
thread material
arrangement according
radiation
arrangement
reflector
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.)
Withdrawn
Application number
EP05715358A
Other languages
German (de)
French (fr)
Inventor
Joachim Jung
Oliver Starzmann
Günter STEVENS
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.)
SICME ITALIA IMPINATI SRL
IST Metz GmbH
Original Assignee
IST Metz 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 IST Metz GmbH filed Critical IST Metz GmbH
Publication of EP1715962A2 publication Critical patent/EP1715962A2/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/53—Base coat plus clear coat type
    • B05D7/536—Base coat plus clear coat type each layer being cured, at least partially, separately
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/20—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/546—No clear coat specified each layer being cured, at least partially, separately
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
    • C03C25/10—Coating
    • C03C25/104—Coating to obtain optical fibres
    • C03C25/1065—Multiple coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
    • B05D3/065—After-treatment
    • B05D3/067—Curing or cross-linking the coating

Definitions

  • the invention relates to an arrangement for multilayer coating of thread material such as conductor wires or optical fibers with a transport path for the continuous continuous transport of the thread material and a heat curing station which is arranged in the transport path and is heatable by means of a heating device for heat curing a solvent-containing lacquer layer applied to the thread material.
  • the invention further relates to a corresponding method.
  • enamelled wires based on solvent-borne coating materials are provided with various layers of lacquer, for example a primer to increase the resistance to aging and better adhesion of the subsequent coating, a main layer for insulation and an outer layer as a bond coat or baking lacquer.
  • lacquer for example a primer to increase the resistance to aging and better adhesion of the subsequent coating, a main layer for insulation and an outer layer as a bond coat or baking lacquer.
  • UV radiation crosslinking of solvent-free coating systems in which the applied coating amount also corresponds to the crosslinked mass, has already been proposed.
  • UV radiation has so far not been put to industrial use in competition with conventional heat drying. Proceeding from this, the invention is based on the object of avoiding the disadvantages which have arisen in the prior art and of making production as flexible as possible.
  • a UV curing station is provided upstream and / or downstream of the heat curing station along the transport route and equipped with at least one UV radiation source for UV radiation curing of a solvent-free lacquer layer applied to the thread material.
  • additional coatings can be created in a continuous production process with easy-to-supply UV devices, which are optimally matched to the required properties.
  • existing systems can be retrofitted or supplemented economically with a small space requirement, so that different types of lacquer layers can be applied, at least one heat-drying layer being combined with a UV-crosslinked layer.
  • UV radiation sources are arranged concentrically around the thread material passing through, preferably distributed at the same angular distance from one another.
  • a further improvement is achieved in that several UV radiation sources are arranged at a distance from one another along the transport route. It is particularly expedient if three UV lamps arranged at a distance from one another along the transport route Radiation sources are distributed around the thread material passing through at an angular distance of 120 ° to one another.
  • the UV radiation sources which are preferably rod-shaped as mercury vapor lamps, should be oriented parallel to the thread material.
  • a further advantageous embodiment provides that the rod-shaped UV radiation sources are each aligned with the thread material via a reflector arrangement which is elliptical in cross section, the UV radiation source being in one focal line and the thread material in the other focal line of the reflector arrangement.
  • the reflector arrangement can be divided lengthways in a parting plane running between the focal lines. This can be achieved in that the reflector arrangement has two reflector segments, which are preferably connected via a hinge, one reflector segment enclosing the line of passage of the thread material and the other reflector segment that can be removed or folded away from the UV radiation source.
  • UV radiation sources are arranged in assigned treatment chambers, and in that the treatment chambers are arranged such that they can be pivoted about the passage line of the thread material by means of a respective swivel unit.
  • the UV curing station is advantageously preceded by a varnish application device for continuous coating of the thread material with the solvent-free varnish.
  • the UV curing station can be installed on a support frame so that it can be moved.
  • the thread material is guided in a flow channel, in particular quartz tube, which is transparent to UV radiation.
  • a further improvement provides that the flow channel runs continuously along several UV radiation sources arranged one behind the other in the direction of flow.
  • the flow channel consists of two pipe half-shells that can be separated from each other. Maintenance is also facilitated in that the flow channel is formed by a plurality of individual tubes which are each assigned to a UV radiation source and are connected to one another via intermediate pieces.
  • a further advantageous embodiment provides that the flow channel has an inlet for supplying process gas (in particular also air) at its inlet end section for the thread material and an outlet for discharging the process gas flowing in the direction of flow of the thread material at its outlet end section.
  • process gas in particular also air
  • At least one cold trap preferably designed as a hollow profile to which coolant can be applied, and the cold trap as part of a reflector arrangement between UV are arranged in the peripheral irradiation area between the UV radiation source and the thread material -Radiation source and thread material is coated as a cold light mirror.
  • a further process improvement can be achieved in that the UV radiation sources are arranged in a gas-tight treatment chamber, and in that the treatment chamber can be acted upon via a gas circuit with process gas which is forcibly conveyed, preferably under excess pressure against the atmosphere.
  • An advantageous embodiment provides that a heat exchanger for cooling and / or a filter for cleaning and / or a fan for circulating the process gas is arranged in the gas circuit outside the treatment chamber.
  • the process gas carried in the gas circuit is preferably reduced to a residual content of 0.1 to 5% by volume in relation to the ambient air in the oxygen fraction.
  • the above-mentioned object is achieved in that, in combination with a thermosetting coating, the thread material is irradiated with UV light at a UV curing station for UV radiation curing of an applied solvent-free lacquer layer.
  • Figure 1 is a coating system for conductor wires with a heat and a UV curing station in a vertical section.
  • FIG. 2 shows a further embodiment of a UV curing station with three UV lamps in plan view
  • Fig. 3 is a vertical section on section line 3-3 of Fig. 2; and Fig. 4 is a block diagram of a UV curing station with a gas circuit.
  • the arrangement or coating system shown in the drawing essentially consists of a transport path 10 for the continuous continuous transport of a conductor wire 12 to be coated, a heat curing station 14 arranged therein and a radiation radiation station 16 arranged downstream with at least one UV radiation source 18.
  • the heat hardening station 14 has a continuous furnace 20 which can be heated by means of a heating device 22 in order to harden the solvent-containing lacquer layer on the conductor wire 12 applied by means of the lacquer application device 24 under the influence of heat.
  • a further lacquer layer applied on the wire material 12 by means of the application device 26 can be crosslinked or cured without solvent by means of UV radiation.
  • a rod-shaped UV radiation source 18 for example as a mercury vapor lamp, is aligned parallel to the continuous conductor wire 12. While the heat-curing station 14 is constructed in a stationary manner, the UV-curing station 16 can be installed on a support frame 28 in the region of the transport route 10 so that it can be moved.
  • each treatment chamber 30 is equipped with a rod-shaped UV lamp 18 aligned parallel to the conductor wire 12, the UV lamps 18 being distributed around the conductor wire 12 at an angular distance of 120 ° from one another.
  • the conductor wire 12 in the UV curing station 16 is continuously in a continuous channel 32 led.
  • This consists of three quartz glass tubes 34 each assigned to a UV lamp 18, which are connected to one another at the end face by means of intermediate pieces 36. It is also possible that the quartz glass tubes 34 or a continuous sewer tube consist of two tube half-shells that can be separated from one another for service purposes.
  • the flow channel 32 has an inlet 40 for supplying process gas.
  • an outlet 44 is provided on the outlet-side end section 42 of the flow channel 32 for discharging the process gas flowing in the direction of flow of the conductor wire 12.
  • the process gas for example N 2 or CO 2 , is carried at a lower flow rate compared to the wire throughput speed, so that the gas is carried along with the conductor wire 12 as laminar as possible.
  • the UV lamps 18 in the treatment chambers 30 are each aligned with the wire material via a reflector arrangement 46 with an elliptical cross section, the UV lamp 18 in one focal line and the conductor wire 12 in the other focal line of the reflector arrangement 46 formed from two reflector segments 48.
  • the reflector arrangement 46 or the treatment chamber 30 can be divided into a parting plane 50 running between the focal lines.
  • the chamber halves are expediently connected in a hinge-like manner via a joint 52.
  • the treatment chambers can be pivoted into a favorable position by means of a swivel unit 54 (FIG. 2) around the pass line of the conductor wire 12.
  • Cooling traps 56 can be provided in the peripheral or lateral radiation area between the UV radiator 18 and the conductor wire 12, which are formed by a hollow profile to which coolant can be applied and which, instead of the quartz glass tubes 34 shown in FIG. 2, keep the treatment room free of impurities.
  • the cooling temperature of the cold traps can be adjusted so that fission products generated in the radiation room are collected or deposited as effectively as possible.
  • the cold traps 56 are also provided with a cold light mirror coating as part of the reflector arrangement 46.
  • the treatment chambers can be supplied with a process gas via a gas circuit 58, the gas flow being guided in the direction of the arrows 60 transversely to the direction of wire passage.
  • the process gas is used to cool the treatment chamber 30 in circulation and, if appropriate, also to support the hardening process.
  • the gas that can be supplied via a pressure connection 62 is under excess pressure against the atmosphere and may have a reduced oxygen content. It is also conceivable to use the ozone generated by the UV radiation in air operation to decompose fission products.
  • a circulation unit is arranged in the gas circuit 58 outside the treatment chamber 30 and comprises a gas cooler 66 arranged downstream of the UV lamp, a downstream cleaning filter 68 and a blower 70 for forcibly conveying the process gas.
  • a copper wire 12 with a diameter of 0.3 mm was coated with a thermosetting polyesterimide wire enamel in a layer thickness of approximately 30 ⁇ m and additionally provided with a UV-hardenable enamel layer as a top coat.
  • the UV varnish used consisted of - 67.5% 3,4-epoxy-cyclohexylmethyl-3,4-epoxycyclohexane-carboxylate; 25.0% Desmophen 670® (a branched polyester polyol from Bayer AG); - 5.0% mixed acrylic sulfonium hexafluorophosphate salt as photoinitiator; - 2.5% of a leveling additive.
  • the homogeneously mixed UV lacquer was applied to the heat-hardened lacquer layer by means of a stripping nozzle and hardened with UV radiation at a throughput speed of 50 m / min. This resulted in a caking strength of> 1 N.

Abstract

The invention relates to an arrangement and a method for coating a thread-type material (12) with paint, using a transport path (10) for the continuous transport of the thread-type material (12). For the multiple coating, a heatable thermosetting station (14) for thermosetting a layer of paint containing a solvent is combined with a UV drying station (16) arranged upstream and/or downstream of the thermosetting station and used for the UV radiation drying of a solvent-free layer of paint applied to the thread-type material (12).

Description

Anordnung und Verfahren zur mehrschichtigen Lackbeschichtung von FadenmaterialArrangement and method for multi-layer lacquer coating of thread material
Beschreibungdescription
Die Erfindung betrifft eine Anordnung zur mehrschichtigen Lackbeschichtung von Fadenmaterial wie Leiterdrähten oder Lichtleitfasern mit einer Transportstrecke zum kontinuierlichen Durchlauftransport des Fadenmaterials und einer in der Transportstrecke angeordneten, mittels einer Heizeinrichtung beheizbaren Wärmehärtungsstation zur Wärmehärtung einer auf das Fadenmaterial aufgebrachten lösemittelhaltigen Lackschicht. Die Erfindung betrifft weiter ein entsprechendes Verfahren.The invention relates to an arrangement for multilayer coating of thread material such as conductor wires or optical fibers with a transport path for the continuous continuous transport of the thread material and a heat curing station which is arranged in the transport path and is heatable by means of a heating device for heat curing a solvent-containing lacquer layer applied to the thread material. The invention further relates to a corresponding method.
In konventionellen Behandlungsanlagen dieser Art werden Lackdrähte auf Basis lösemittelhaltiger Beschichtungsstoffe im Mehrschichtaufbau mit verschiedenen Lackschichten versehen, beispielsweise einer Grundierung zur Erhöhung der Alterungsbeständigkeit und besseren Haftung der Folgebe- schichtung, einer Hauptschicht zur Isolierung und einer äußeren Schicht als Bondcoat bzw. Backlack. Die Vorteile der Wärmetrocknung liegen in der ho- hen Temperaturbeständigkeit des Isolierlacks, der Beschichtungsgüte und insbesondere Porenfreiheit und in der kostengünstigen Fertigung. Problematisch ist allerdings die Entsorgung des abdampfenden Lösemittels und dessen Beeinträchtigung der Arbeitsumgebung.In conventional treatment plants of this type, enamelled wires based on solvent-borne coating materials are provided with various layers of lacquer, for example a primer to increase the resistance to aging and better adhesion of the subsequent coating, a main layer for insulation and an outer layer as a bond coat or baking lacquer. The advantages of heat drying lie in the high temperature resistance of the insulating varnish, the coating quality and in particular freedom from pores and in the cost-effective production. However, the disposal of the evaporating solvent and its impairment of the working environment is problematic.
Aus diesem Grunde wurde bereits die UV-Strahlungsvernetzung von lösemittelfreien Lacksystemen, bei denen die aufgetragene Beschichtungsmenge auch der vernetzten Masse entspricht, vorgeschlagen. Die UV-Bestrahlung konnte jedoch in Konkurrenz zur herkömmlichen Wärmetrocknung bislang nicht zum industriellen Einsatz gebracht werden. Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, die im Stand der Technik aufgetretenen Nachteile zu vermeiden und eine möglichst flexible Fertigung zu ermöglichen.For this reason, UV radiation crosslinking of solvent-free coating systems, in which the applied coating amount also corresponds to the crosslinked mass, has already been proposed. However, UV radiation has so far not been put to industrial use in competition with conventional heat drying. Proceeding from this, the invention is based on the object of avoiding the disadvantages which have arisen in the prior art and of making production as flexible as possible.
Zur Lösung dieser Aufgabe wird die im Patentanspruch 1 bzw. 23 angegebene Merkmalskombination vorgeschlagen. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen.To achieve this object, the combination of features specified in claims 1 and 23 is proposed. Advantageous refinements and developments of the invention result from the dependent claims.
Die Erfindung geht von dem Gedanken aus, die klassische Wärrnetrocknung mit der UV-Licht induzierten Vernetzung zu kombinieren, um dadurch besondere Eigenschaftsprofile der Lackbeschichtung von fadenförmigem Material zu erzielen. Dementsprechend wird erfindungsgemäß eine der Wärmehärtungsstation entlang der Transportstrecke vor- und/oder nachgeordnete, mit mindestens einer UV-Strahlungsquelle bestückte UV-Härtungsstation zur UV-Strahlungshärtung einer auf das Fadenmaterial aufgebrachten lösemittelfreien Lackschicht vorgeschlagen. Dadurch lassen sich in einem kontinuierlichen Produktionsprozess mit einfach beizustellenden UV-Einrichtungen wahlweise zusätzliche Beschichtungen schaffen, welche optimal auf die er- forderlichen Eigenschaften abgestimmt sind. Insbesondere lassen sich bestehende Anlagen kostengünstig mit geringem Platzbedarf nach rüsten bzw. ergänzen, so dass verschiedenartige Lackschichten aufgebracht werden können, wobei mindestens eine wärmetrocknende Schicht mit einer UV- vernetzten Schicht kombiniert wird.The invention is based on the idea of combining classic heat drying with crosslinking induced by UV light in order to achieve special property profiles for the coating of filamentary material. Accordingly, according to the invention, a UV curing station is provided upstream and / or downstream of the heat curing station along the transport route and equipped with at least one UV radiation source for UV radiation curing of a solvent-free lacquer layer applied to the thread material. As a result, additional coatings can be created in a continuous production process with easy-to-supply UV devices, which are optimally matched to the required properties. In particular, existing systems can be retrofitted or supplemented economically with a small space requirement, so that different types of lacquer layers can be applied, at least one heat-drying layer being combined with a UV-crosslinked layer.
Um eine gleichmäßige Härtung im Durchlauf zu erreichen, ist es von Vorteil, wenn mehrere UV-Strahlungsquellen konzentrisch um das hindurchlaufende Fadenmaterial herum vorzugsweise in gleichem Winkelabstand voneinander verteilt angeordnet sind. Eine weitere Verbesserung wird dadurch erreicht, dass mehrere UV-Strahlungsquellen entlang der Transportstrecke im Abstand voneinander angeordnet sind. Besonders günstig ist es, wenn drei im Abstand voneinander längs der Transportstrecke angeordnete UV- Strahlungsquellen um das hindurchlaufende Fadenmaterial herum im Winkelabstand von 120° zueinander verteilt sind. Dabei sollten die vorzugsweise als Quecksilberdampflampen stabförmig ausgebildeten UV- Strahlungsquellen parallel zu dem Fadenmaterial ausgerichtet sein.In order to achieve uniform hardening in the pass, it is advantageous if a plurality of UV radiation sources are arranged concentrically around the thread material passing through, preferably distributed at the same angular distance from one another. A further improvement is achieved in that several UV radiation sources are arranged at a distance from one another along the transport route. It is particularly expedient if three UV lamps arranged at a distance from one another along the transport route Radiation sources are distributed around the thread material passing through at an angular distance of 120 ° to one another. The UV radiation sources, which are preferably rod-shaped as mercury vapor lamps, should be oriented parallel to the thread material.
Eine weitere vorteilhafte Ausgestaltung sieht vor, dass die stabförmigen UV- Strahlungsquellen über jeweils eine im Querschnitt elliptische Reflektoranordnung auf das Fadenmaterial ausgerichtet sind, wobei die UV- Strahlungsquelle in der einen Brennlinie und das Fadenmaterial in der ande- ren Brennlinie der Reflektoranordnung liegen.A further advantageous embodiment provides that the rod-shaped UV radiation sources are each aligned with the thread material via a reflector arrangement which is elliptical in cross section, the UV radiation source being in one focal line and the thread material in the other focal line of the reflector arrangement.
Um Servicearbeiten zu erleichtern, ist es vorteilhaft, wenn die Reflektoranordnung in einer zwischen den Brennlinien verlaufenden Trennebene längsteilbar ist. Dies lässt sich dadurch realisieren, dass die Reflektoranordnung zwei vorzugsweise über ein Gelenk verbundene Reflektorsegmente aufweist, wobei ein Reflektorsegment die Durchlauflinie des Fadenmaterials und das davon abnehmbare oder abklappbare andere Reflektorsegment die UV- Strahlungsquelle umschließt.In order to facilitate service work, it is advantageous if the reflector arrangement can be divided lengthways in a parting plane running between the focal lines. This can be achieved in that the reflector arrangement has two reflector segments, which are preferably connected via a hinge, one reflector segment enclosing the line of passage of the thread material and the other reflector segment that can be removed or folded away from the UV radiation source.
Eine weitere Verbesserung der Wartungsfreundlichkeit wird dadurch erreicht, dass die UV-Strahlungsquellen in zugeordneten Behandlungskammern angeordnet sind, und dass die Behandlungskammern über jeweils eine Schwenkeinheit um die Durchlauflinie des Fadenmaterials herum verschwenkbar angeordnet sind.A further improvement in the ease of maintenance is achieved in that the UV radiation sources are arranged in assigned treatment chambers, and in that the treatment chambers are arranged such that they can be pivoted about the passage line of the thread material by means of a respective swivel unit.
Vorteilhafterweise ist der UV-Härtungsstation eine Lackauftragsvorrichtung zur Durchlaufbeschichtung des Fadenmaterials mit dem lösemittelfreien Lack vorgeordnet.The UV curing station is advantageously preceded by a varnish application device for continuous coating of the thread material with the solvent-free varnish.
Um einen Aufbau an der Fertigungslinie mit möglichst geringem Aufwand zu erlauben, ist es günstig, wenn die UV-Härtungsstation auf einem Traggestell ortsveränderlich installierbar ist. Zur Beeinflussung des Verfahrensablaufs und Ableitung von Spaltprodukten ist es vorteilhaft, wenn das Fadenmaterial in einem für UV-Strahlung durchlässigen Durchlaufkanal, insbesondere Quarzrohr geführt ist. Eine weitere Verbesserung sieht vor, dass der Durchlaufkanal entlang mehrerer in Durchlaufrichtung hintereinander angeordneter UV-Strahlungsquellen durchgängig verläuft.In order to allow assembly on the production line with as little effort as possible, it is advantageous if the UV curing station can be installed on a support frame so that it can be moved. To influence the course of the process and to derive fission products, it is advantageous if the thread material is guided in a flow channel, in particular quartz tube, which is transparent to UV radiation. A further improvement provides that the flow channel runs continuously along several UV radiation sources arranged one behind the other in the direction of flow.
Für Servicearbeiten während des Betriebs ist es vorteilhaft, wenn der Durch- laufkanal aus zwei voneinander trennbaren Rohrhalbschalen besteht. Die Instandhaltung wird auch dadurch erleichtert, dass der Durchlaufkanal durch mehrere jeweils einer UV-Strahlungsquelle zugeordnete, über Zwischenstücke durchgängig miteinander verbundene Einzelrohre gebildet ist.For service work during operation, it is advantageous if the flow channel consists of two pipe half-shells that can be separated from each other. Maintenance is also facilitated in that the flow channel is formed by a plurality of individual tubes which are each assigned to a UV radiation source and are connected to one another via intermediate pieces.
Eine weitere vorteilhafte Ausgestaltung sieht vor, dass der Durchlaufkanal an seinem einlaufseitigen Endabschnitt für das Fadenmaterial einen Einlass zur Zufuhr von Prozessgas (insbesondere auch Luft) und an seinem auslaufsei- tigen Endabschnitt einen Auslass zur Ableitung des in Durchlaufrichtung des Fadenmaterials strömenden Prozessgases aufweist.A further advantageous embodiment provides that the flow channel has an inlet for supplying process gas (in particular also air) at its inlet end section for the thread material and an outlet for discharging the process gas flowing in the direction of flow of the thread material at its outlet end section.
Ein günstiges laminares Strömungsverhalten lässt sich dadurch erreichen, dass das in den Durchlaufkanal einströmende Prozessgas eine geringere Strömungsgeschwindigkeit als die Durchlaufgeschwindigkeit des Fadenmaterials besitzt.Favorable laminar flow behavior can be achieved in that the process gas flowing into the flow channel has a lower flow speed than the flow speed of the thread material.
Um den Behandlungsraum von Verunreinigungen freizuhalten und zugleich die Bestrahlung zu optimieren ist es von Vorteil, wenn im peripheren Be- strahlungsbereich zwischen UV-Strahlungsquelle und Fadenmaterial mindestens eine vorzugsweise als mit Kühlmittel beaufschlagbares Hohlprofil ausgebildete Kühlfalle angeordnet ist und die Kühlfalle als Teil einer Reflektoranordnung zwischen UV-Strahlungsquelle und Fadenmaterial als Kaltlichtspiegel beschichtet ist. Eine weitere Prozessverbesserung lässt sich dadurch erreichen, dass die UV-Strahlungsquellen in einer gasdichten Behandlungskammer angeordnet sind, und dass die Behandlungskammer über einen Gaskreislauf mit vorzugsweise unter Überdruck gegen Atmosphäre im Umlauf zwangsgefördertem Prozessgas beaufschlagbar ist. Eine vorteilhafte Ausführung sieht vor, dass in dem Gaskreislauf außerhalb der Behandlungskammer ein Wärmetauscher zur Kühlung und/oder ein Filter zur Reinigung und/oder ein Gebläse zur Umwälzung des Prozessgases angeordnet ist.In order to keep the treatment room free of impurities and at the same time to optimize the irradiation, it is advantageous if at least one cold trap, preferably designed as a hollow profile to which coolant can be applied, and the cold trap as part of a reflector arrangement between UV are arranged in the peripheral irradiation area between the UV radiation source and the thread material -Radiation source and thread material is coated as a cold light mirror. A further process improvement can be achieved in that the UV radiation sources are arranged in a gas-tight treatment chamber, and in that the treatment chamber can be acted upon via a gas circuit with process gas which is forcibly conveyed, preferably under excess pressure against the atmosphere. An advantageous embodiment provides that a heat exchanger for cooling and / or a filter for cleaning and / or a fan for circulating the process gas is arranged in the gas circuit outside the treatment chamber.
Um die Bestrahlungsbedingungen zu verbessern, ist es vorgesehen, dass das in dem Gaskreislauf geführte Prozessgas gegenüber der Umgebungsluft im Sauerstoffanteil vorzugsweise auf einen Restgehalt von 0,1 bis 5 Vol.% reduziert ist.In order to improve the irradiation conditions, it is provided that the process gas carried in the gas circuit is preferably reduced to a residual content of 0.1 to 5% by volume in relation to the ambient air in the oxygen fraction.
In verfahrensmäßiger Hinsicht wird die eingangs genannte Aufgabe dadurch gelöst, dass in Kombination mit einer wärmehärtenden Beschichtung das Fadenmaterial an einer UV-Härtungsstation zur UV-Strahlungshärtung einer aufgebrachten lösemittelfreien Lackschicht mit UV-Licht bestrahlt wird.From a procedural point of view, the above-mentioned object is achieved in that, in combination with a thermosetting coating, the thread material is irradiated with UV light at a UV curing station for UV radiation curing of an applied solvent-free lacquer layer.
Im Folgenden wird die Erfindung anhand eines in der Zeichnung in schema- tischer Weise dargestellten Ausführungsbeispiels näher erläutert. Es zeigenThe invention is explained in more detail below on the basis of an exemplary embodiment shown schematically in the drawing. Show it
Fig. 1 eine Beschichtungsanlage für Leiterdrähte mit einer Wärme- und einer UV-Härtungsstation in einem Vertikalschnitt;Figure 1 is a coating system for conductor wires with a heat and a UV curing station in a vertical section.
Fig. 2 eine weitere Ausführungsform einer UV-Härtungsstation mit drei UV-Strahlern in der Draufsicht;2 shows a further embodiment of a UV curing station with three UV lamps in plan view;
Fig. 3 einen Vertikalschnitt in der Schnittlinie 3-3 der Fig. 2; und Fig. 4 ein Blockschaltbild einer UV-Härtungsstation mit einem Gaskreislauf.Fig. 3 is a vertical section on section line 3-3 of Fig. 2; and Fig. 4 is a block diagram of a UV curing station with a gas circuit.
Die in der Zeichnung dargestellte Anordnung bzw. Beschichtungsanlage be- steht im Wesentlichen aus einer Transportstrecke 10 zum kontinuierlichen Durchlauftransport eines zu beschichtenden Leiterdrahts 12, einer darin angeordneten Wärmehärtungsstation 14 und einer nachgeordneten Strah- lungs-Härtungsstation 16 mit mindestens einer UV-Strahlungsquelle 18.The arrangement or coating system shown in the drawing essentially consists of a transport path 10 for the continuous continuous transport of a conductor wire 12 to be coated, a heat curing station 14 arranged therein and a radiation radiation station 16 arranged downstream with at least one UV radiation source 18.
Die Wärmehärtungsstation 14 weist einen Durchlaufofen 20 auf, der mittels einer Heizeinrichtung 22 beheizbar ist, um die mittels der Lackauftragsvorrichtung 24 aufgebrachte lösemittelhaltige Lackschicht auf dem Leiterdraht 12 unter Wärmeeinfluss zu härten.The heat hardening station 14 has a continuous furnace 20 which can be heated by means of a heating device 22 in order to harden the solvent-containing lacquer layer on the conductor wire 12 applied by means of the lacquer application device 24 under the influence of heat.
An der UV-Härtungsstation 16 lässt sich eine mittels Auftragsvorrichtung 26 aufgetragene weitere Lackschicht auf dem Drahtmaterial 12 mittels UV- Strahlung lösemittelfrei vernetzen bzw. härten. Zu diesem Zweck ist eine stabförmige UV-Strahlungsquelle 18 beispielsweise als Quecksilberdampflampe parallel zu dem durchlaufenden Leiterdraht 12 ausgerichtet. Während die Wärmehärtungsstation 14 stationär aufgebaut ist, lässt sich die UV- Härtungsstation 16 auf einem Traggestell 28 ortsveränderlich im Bereich der Transportstrecke 10 installieren.At the UV curing station 16, a further lacquer layer applied on the wire material 12 by means of the application device 26 can be crosslinked or cured without solvent by means of UV radiation. For this purpose, a rod-shaped UV radiation source 18, for example as a mercury vapor lamp, is aligned parallel to the continuous conductor wire 12. While the heat-curing station 14 is constructed in a stationary manner, the UV-curing station 16 can be installed on a support frame 28 in the region of the transport route 10 so that it can be moved.
Bei der in Fig. 2 gezeigten UV-Härtungsstation 16 sind drei Behandlungs- kammern 30 seriell in Durchlaufrichtung hintereinander angeordnet. Jede Behandlungskammer 30 ist mit einem parallel zu dem Leiterdraht 12 ausgerichteten stabförmigen UV-Strahler 18 bestückt, wobei die UV-Strahler 18 im Winkelabstand von 120° zueinander um den Leiterdraht 12 herum verteilt sind.In the UV curing station 16 shown in FIG. 2, three treatment chambers 30 are arranged in series in the direction of passage. Each treatment chamber 30 is equipped with a rod-shaped UV lamp 18 aligned parallel to the conductor wire 12, the UV lamps 18 being distributed around the conductor wire 12 at an angular distance of 120 ° from one another.
Um die Behandlungsbedingungen beeinflussen zu können, ist der Leiterdraht 12 in der UV-Härtungsstation 16 durchgängig in einem Durchlaufkanal 32 geführt. Dieser besteht aus drei jeweils einem UV-Strahler 18 zugeordneten Quarzglasrohren 34, die über Zwischenstücke 36 stirnseitig miteinander verbunden sind. Möglich ist es auch, dass die Quarzglasrohre 34 oder auch ein durchgängiges Kanalrohr aus zwei zu Servicezwecken voneinander trennbaren Rohrhalbschalen bestehen.In order to be able to influence the treatment conditions, the conductor wire 12 in the UV curing station 16 is continuously in a continuous channel 32 led. This consists of three quartz glass tubes 34 each assigned to a UV lamp 18, which are connected to one another at the end face by means of intermediate pieces 36. It is also possible that the quartz glass tubes 34 or a continuous sewer tube consist of two tube half-shells that can be separated from one another for service purposes.
An seinem einlaufseitigen Endabschnitt 38 weist der Durchlaufkanal 32 einen Einlass 40 zur Zuleitung von Prozessgas auf. Entsprechend ist an dem auslaufseitigen Endabschnitt 42 des Durchlaufkanals 32 ein Auslass 44 zur Ableitung des in Durchlaufrichtung des Leiterdrahts 12 strömenden Prozessgases vorgesehen. Das Prozessgas, beispielsweise N2 oder CO2 wird mit geringerer Strömungsgeschwindigkeit im Vergleich zu der Drahtdurchlaufgeschwindigkeit geführt, so dass das Gas möglichst laminar mit dem Leiterdraht 12 mitgeführt wird.At its inlet-side end section 38, the flow channel 32 has an inlet 40 for supplying process gas. Correspondingly, an outlet 44 is provided on the outlet-side end section 42 of the flow channel 32 for discharging the process gas flowing in the direction of flow of the conductor wire 12. The process gas, for example N 2 or CO 2 , is carried at a lower flow rate compared to the wire throughput speed, so that the gas is carried along with the conductor wire 12 as laminar as possible.
Wie am besten aus der Querschnittsansicht gemäß Fig. 3 ersichtlich, sind die UV-Strahler 18 in den Behandlungskammern 30 über jeweils eine im Querschnitt elliptische Reflektoranordnung 46 auf das Drahtmaterial ausgerichtet, wobei der UV-Strahler 18 in der einen Brennlinie und der Leiterdraht 12 in der anderen Brennlinie der aus zwei Reflektorsegmenten 48 gebildeten Reflektoranordnung 46 liegen.As can best be seen from the cross-sectional view according to FIG. 3, the UV lamps 18 in the treatment chambers 30 are each aligned with the wire material via a reflector arrangement 46 with an elliptical cross section, the UV lamp 18 in one focal line and the conductor wire 12 in the other focal line of the reflector arrangement 46 formed from two reflector segments 48.
Um Montage- und Wartungsarbeiten durchführen zu können, ist die Reflektoranordnung 46 bzw. die Behandlungskammer 30 in einer zwischen den Brennlinien verlaufenden Trennebene 50 teilbar. Hierfür sind die Kammerhälften zweckmäßig über ein Gelenk 52 scharnierartig verbunden. Um die Zugänglichkeit weiter zu verbessern, können die Behandlungskammern über jeweils eine Schwenkeinheit 54 (Fig. 2) um die Durchlauflinie des Leiterdrahts 12 herum in eine günstige Stellung geschwenkt werden.In order to be able to carry out assembly and maintenance work, the reflector arrangement 46 or the treatment chamber 30 can be divided into a parting plane 50 running between the focal lines. For this purpose, the chamber halves are expediently connected in a hinge-like manner via a joint 52. In order to further improve the accessibility, the treatment chambers can be pivoted into a favorable position by means of a swivel unit 54 (FIG. 2) around the pass line of the conductor wire 12.
Im peripheren bzw. seitlichen Bestrahlungsbereich zwischen dem UV- Strahler 18 und dem Leiterdraht 12 können Kühlfallen 56 vorgesehen sein, die durch ein mit Kühlmittel beaufschlagbares Hohlprofil gebildet sind und anstelle der in Fig. 2 gezeigten Quarzglasrohre 34 den Behandlungsraum von Verunreinigungen freihalten. Die Kühltemperatur der Kühlfallen ist einstellbar, so dass im Bestrahlungsraum entstehende Spaltprodukte möglichst effektiv aufgefangen bzw. abgelagert werden. Um die UV-Bestrahlung zu optimieren, sind auch die Kühlfallen 56 als Teil der Reflektoranordnung 46 mit einer Kaltlichtspiegelbeschichtung versehen.Cooling traps 56 can be provided in the peripheral or lateral radiation area between the UV radiator 18 and the conductor wire 12, which are formed by a hollow profile to which coolant can be applied and which, instead of the quartz glass tubes 34 shown in FIG. 2, keep the treatment room free of impurities. The cooling temperature of the cold traps can be adjusted so that fission products generated in the radiation room are collected or deposited as effectively as possible. In order to optimize the UV radiation, the cold traps 56 are also provided with a cold light mirror coating as part of the reflector arrangement 46.
Bei der in Fig. 4 gezeigten Ausführungsform sind die Behandlungskammern über einen Gaskreislauf 58 mit einem Prozessgas beaufschlagbar, wobei der Gasstrom in Richtung der Pfeile 60 quer zur Drahtdurchlaufrichtung geführt ist. Das Prozessgas dient zur Umlaufkühlung der Behandlungskammer 30 und ggf. auch zur Unterstützung des Härtungsprozesses. Hierbei steht das über einen Druckanschluss 62 zuführbare Gas unter Überdruck gegen At- mosphäre und weist ggf. einen reduzierten Sauerstoffanteil auf. Denkbar ist es auch, das bei Luftbetrieb durch die UV-Strahlung erzeugte Ozon für den Abbau von Spaltprodukten einzusetzen. In dem Gaskreislauf 58 ist außerhalb der Behandlungskammer 30 ein Umwälzaggregat angeordnet, welches einen stromab von dem UV-Strahler angeordneten Gaskühler 66, ein nach- geschaltetes Reinigungsfilter 68 und ein Gebläse 70 zur Zwangsförderung des Prozessgases umfasst.In the embodiment shown in FIG. 4, the treatment chambers can be supplied with a process gas via a gas circuit 58, the gas flow being guided in the direction of the arrows 60 transversely to the direction of wire passage. The process gas is used to cool the treatment chamber 30 in circulation and, if appropriate, also to support the hardening process. In this case, the gas that can be supplied via a pressure connection 62 is under excess pressure against the atmosphere and may have a reduced oxygen content. It is also conceivable to use the ozone generated by the UV radiation in air operation to decompose fission products. A circulation unit is arranged in the gas circuit 58 outside the treatment chamber 30 and comprises a gas cooler 66 arranged downstream of the UV lamp, a downstream cleaning filter 68 and a blower 70 for forcibly conveying the process gas.
In der vorstehend beschriebenen Anlage wurde ein Kupferdraht 12 des Durchmessers 0,3 mm mit einem wärmehärtenden Polyesterimid-Drahtlack in einer Schichtdicke von ca. 30 μm beschichtet und zusätzlich mit einer UV- härtbaren Lackschicht als Topcoat versehen.In the system described above, a copper wire 12 with a diameter of 0.3 mm was coated with a thermosetting polyesterimide wire enamel in a layer thickness of approximately 30 μm and additionally provided with a UV-hardenable enamel layer as a top coat.
Der verwendete UV-Lack bestand aus - 67,5 % 3,4-Epoxy-cyclöhexylmethyl-3,4-epoxycyclohexane-carboxylat; - 25,0 % Desmophen 670 ® (ein verzweigtes Polyesterpolyol der Fa. Bayer AG); - 5,0 % gemischtes Acrylsulfonium-Hexafluorophosphat-Salz als Photoinitiator; - 2,5 % eines Verlaufsadditivs.The UV varnish used consisted of - 67.5% 3,4-epoxy-cyclohexylmethyl-3,4-epoxycyclohexane-carboxylate; 25.0% Desmophen 670® (a branched polyester polyol from Bayer AG); - 5.0% mixed acrylic sulfonium hexafluorophosphate salt as photoinitiator; - 2.5% of a leveling additive.
Der homogen gemischte UV-Lack wurde mittels einer Abstreifdüse auf die wärmegehärtete Lackschicht aufgebracht und bei einer Durchlaufgeschwindigkeit von 50 m/min mit UV-Strahlung gehärtet. Dabei ergab sich eine Ver- backungsfestigkeit von > 1 N. The homogeneously mixed UV lacquer was applied to the heat-hardened lacquer layer by means of a stripping nozzle and hardened with UV radiation at a throughput speed of 50 m / min. This resulted in a caking strength of> 1 N.

Claims

Patentansprüche claims
1. Anordnung zur mehrschichtigen Lackbeschichtung von Fadenmaterial (12) wie Leiterdrähten oder Lichtleitfasern mit einer Transportstrecke (10) zum kontinuierlichen Durchlauftransport des Fadenmaterials (12) und einer in der Transportstrecke (10) angeordneten, mittels einer Heizeinrichtung (22) beheizbaren Wärmehärtungsstation (14) zur Wärmehärtung einer auf das Fadenmaterial (12) aufgebrachten lösemittelhaltigen Lackschicht, gekennzeichnet durch eine der Wärmehär- tungsstation (14) entlang der Transportstrecke (10) vor- und/oder nach- geordnete, mit mindestens einer UV-Strahlungsquelle (18) bestückte UV-Härtungsstation (16) zur UV-Strahlungshärtung einer auf das Fadenmaterial (12) aufgebrachten lösemittelfreien Lackschicht.1. Arrangement for the multi-layer lacquer coating of thread material (12) such as conductor wires or optical fibers with a transport path (10) for the continuous continuous transport of the thread material (12) and a heat curing station (14) which is arranged in the transport path (10) and can be heated by means of a heating device (22) For the heat curing of a solvent-borne lacquer layer applied to the thread material (12), characterized by a UV radiation which is arranged upstream and / or downstream of the heat curing station (14) along the transport path (10) and is equipped with at least one UV radiation source (18). Hardening station (16) for UV radiation curing of a solvent-free lacquer layer applied to the thread material (12).
2. Anordnung nach Anspruch 1 , dadurch gekennzeichnet, dass mehrere UV-Strahlungsquellen (18) konzentrisch um das hindurchlaufende Fadenmaterial (12) herum vorzugsweise in gleichem Winkelabstand voneinander verteilt angeordnet sind.2. Arrangement according to claim 1, characterized in that a plurality of UV radiation sources (18) are arranged concentrically around the thread material (12) passing through, preferably distributed at the same angular distance from one another.
3. Anordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass mehrere UV-Strahlungsquellen (18) entlang der Transportstrecke (10) im Abstand voneinander angeordnet sind.3. Arrangement according to claim 1 or 2, characterized in that a plurality of UV radiation sources (18) along the transport path (10) are arranged at a distance from each other.
4. Anordnung nach einem der Ansprüche 1 bis 3, dadurch gekennzeic - net, dass drei im Abstand voneinander längs der Transportstrecke (10) angeordnete UV-Strahlungsquellen (18) um das hindurchlaufende Fadenmaterial (12) herum im Winkelabstand von 120° zueinander verteilt sind.4. Arrangement according to one of claims 1 to 3, characterized in that three UV radiation sources (18) arranged at a distance from one another along the transport path (10) are distributed around the thread material (12) passing through at an angular distance of 120 ° to one another ,
5. Anordnung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die vorzugsweise als Quecksilberdampflampen stabförmig ausgebildeten UV-Strahlungsquellen (18) parallel zu dem Fadenmaterial (12) ausgerichtet sind.5. Arrangement according to one of claims 1 to 4, characterized in that the rod-shaped, preferably as mercury vapor lamps trained UV radiation sources (18) are aligned parallel to the thread material (12).
6. Anordnung nach einem der Ansprüche 1 bis 5, dadurch gekennzeich- net, dass die stabförmigen UV-Strahlungsquellen (18) über jeweils eine im Querschnitt elliptische Reflektoranordnung (46) auf das Fadenmaterial (12) ausgerichtet sind, wobei die UV-Strahlungsquelle (18) in der einen Brennlinie und das Fadenmaterial (12) in der anderen Brennlinie der Reflektoranordnung (46) liegen.6. Arrangement according to one of claims 1 to 5, characterized in that the rod-shaped UV radiation sources (18) are each aligned with a cross-sectionally elliptical reflector arrangement (46) on the thread material (12), the UV radiation source ( 18) in one focal line and the thread material (12) in the other focal line of the reflector arrangement (46).
7. Anordnung nach Anspruch 6, dadurch gekennzeichnet, dass die Reflektoranordnung (46) in einer zwischen den Brennlinien verlaufenden Trennebene (50) längsteilbar ist.7. Arrangement according to claim 6, characterized in that the reflector arrangement (46) in a separating plane (50) extending between the focal lines is longitudinally divisible.
8. Anordnung nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass die Reflektoranordnung (46) zwei vorzugsweise über ein Gelenk (52) verbundene Refiektorsegmente aufweist, wobei ein Reflektorsegment (48) die Durchlauflinie des Fadenmaterials (12) und das davon abnehmbare oder abklappbare andere Reflektorsegment (48) die UV- Strahlungsquelle (18) umschließt.8. Arrangement according to claim 6 or 7, characterized in that the reflector arrangement (46) has two preferably via a hinge (52) connected reflector segments, one reflector segment (48) the pass line of the thread material (12) and the other removable or foldable Reflector segment (48) encloses the UV radiation source (18).
9. Anordnung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die UV-Strahlungsquellen (18) in zugeordneten Behandlungskammern (30) angeordnet sind, und dass die Behandlungskam- mern (30) über jeweils eine Schwenkeinheit (54) um die Durchlauflinie des Fadenmaterials (12) herum verschwenkbar angeordnet sind.9. Arrangement according to one of claims 1 to 8, characterized in that the UV radiation sources (18) are arranged in assigned treatment chambers (30) and that the treatment chambers (30) each have a swivel unit (54) around the pass line of the thread material (12) are arranged pivotably around.
10. Anordnung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass der UV-Härtungsstation (16) eine Lackauftragsvorrichtung (26) zur Durchlaufbeschichtung des Fadenmaterials (12) mit dem lösemittelfreien Lack vorgeordnet ist. 10. Arrangement according to one of claims 1 to 9, characterized in that the UV curing station (16) is preceded by a lacquer application device (26) for continuous coating of the thread material (12) with the solvent-free lacquer.
11. Anordnung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die UV-Härtungsstation (16) auf einem Traggestell (28) ortsveränderlich installierbar ist.11. Arrangement according to one of claims 1 to 10, characterized in that the UV curing station (16) on a support frame (28) can be installed in a variable position.
12. Anordnung nach einem der Ansprüche 1 bis 11 , dadurch gekennzeichnet, dass das Fadenmaterial (12) in einem für UV-Strahlung durchlässigen Durchlaufkanal (32), insbesondere Quarzrohr geführt ist.12. Arrangement according to one of claims 1 to 11, characterized in that the thread material (12) is guided in a passage channel (32), in particular quartz tube, which is transparent to UV radiation.
13. Anordnung nach Anspruch 12, dadurch gekennzeichnet, dass der Durchlaufkanal (32) entlang von mehreren in Durchlaufrichtung hintereinander angeordneten UV-Strahlungsquellen (18) durchgängig verläuft.13. The arrangement according to claim 12, characterized in that the flow channel (32) runs continuously along a plurality of UV radiation sources (18) arranged one behind the other in the flow direction.
14. Anordnung nach Anspruch 12 oder 13, dadurch gekennzeichnet, dass der Durchlaufkanal (32) aus zwei voneinander trennbaren Rohrhalbschalen besteht.14. Arrangement according to claim 12 or 13, characterized in that the flow channel (32) consists of two separable tubular half-shells.
15. Anordnung nach einem der Ansprüche 12 bis 14, dadurch gekennzeichnet, dass der Durchlaufkanal (32) durch mehrere jeweils einer UV-Strahlungsquelle (18) zugeordnete, über Zwischenstücke (36) durchgängig miteinander verbundene Einzelrohre (34) gebildet ist.15. Arrangement according to one of claims 12 to 14, characterized in that the flow channel (32) is formed by a plurality of individual tubes (34) which are each associated with a UV radiation source (18) and are connected to one another via intermediate pieces (36).
16. Anordnung nach einem der Ansprüche 12 bis 15, dadurch gekennzeichnet, dass der Durchlaufkanal (32) an seinem einlaufseitigen End- abschnitt (38) für das Fadenmaterial (12) einen Einlass (40) zur Zufuhr von Prozessgas und an seinem auslaufseitigen Endabschnitt (42) einen Auslass (44) zur Ableitung des in Durchlaufrichtung des Fadenmaterials (12) strömenden Prozessgases aufweist.16. Arrangement according to one of claims 12 to 15, characterized in that the flow channel (32) at its inlet end section (38) for the thread material (12) has an inlet (40) for supplying process gas and at its outlet end section ( 42) has an outlet (44) for discharging the process gas flowing in the direction of passage of the thread material (12).
17. Anordnung nach einem der Ansprüche 12 bis 16, dadurch gekennzeichnet, dass das in den Durchlaufkanal (32) einströmende Prozess- gas eine geringere Strömungsgeschwindigkeit als die Durchlaufgeschwindigkeit des Fadenmaterials (12) besitzt.17. Arrangement according to one of claims 12 to 16, characterized in that the process flowing into the flow channel (32) gas has a lower flow rate than the throughput speed of the thread material (12).
18. Anordnung nach einem der Ansprüche 1 bis 17, dadurch gekenn- zeichnet, dass im peripheren Bestrahlungsbereich zwischen UV- Strahlungsquelle (18) und Fadenmaterial (12) mindestens eine vorzugsweise als mit Kühlmittel beaufschlagbares Hohlprofil ausgebildete Kühlfalle (56) angeordnet ist.18. Arrangement according to one of claims 1 to 17, characterized in that in the peripheral radiation area between the UV radiation source (18) and the thread material (12) at least one cooling trap (56), preferably designed as a coolant, can be arranged.
19. Anordnung nach Anspruch 18, dadurch gekennzeichnet, dass die Kühlfalle (56) als Teil einer Reflektoranordnung (46) zwischen UV- Strahlungsquelle (18) und Fadenmaterial (12) als Kaltlichtspiegel beschichtet ist.19. The arrangement according to claim 18, characterized in that the cold trap (56) as part of a reflector arrangement (46) between the UV radiation source (18) and thread material (12) is coated as a cold light mirror.
20. Anordnung nach einem der Ansprüche 1 bis 19, dadurch gekennzeichnet, dass die UV-Strahlungsquellen (18) in einer gasdichten Behandlungskammer (30) angeordnet sind, und dass die Behandlungskammer (30) über einen Gaskreislauf (58) mit vorzugsweise unter Ü- berdruck gegen Atmosphäre im Umlauf zwangsgefördertem Prozess- gas bzw. Luft beaufschlagbar ist.20. Arrangement according to one of claims 1 to 19, characterized in that the UV radiation sources (18) are arranged in a gas-tight treatment chamber (30), and that the treatment chamber (30) via a gas circuit (58) with preferably under Ü- Overpressure against atmosphere in the circulation of forced gas or air can be applied.
21. Anordnung nach Anspruch 20, dadurch gekennzeichnet, dass in dem Gaskreislauf (58) außerhalb der Behandlungskammer (30) ein Wärmetauscher (66) zur Kühlung und/oder ein Filter (68) zur Reinigung und/oder ein Gebläse (70) zur Umwälzung des Prozessgases angeordnet ist.21. The arrangement according to claim 20, characterized in that in the gas circuit (58) outside the treatment chamber (30) a heat exchanger (66) for cooling and / or a filter (68) for cleaning and / or a blower (70) for circulation of the process gas is arranged.
22. Anordnung nach Anspruch 20 oder 21 , dadurch gekennzeichnet, dass das in dem Gaskreislauf (58) geführte Prozessgas gegenüber der Umgebungsluft im Sauerstoffanteil vorzugsweise auf einen Restgehalt von 0,1 bis 5 Vol.% reduziert ist. 22. Arrangement according to claim 20 or 21, characterized in that the process gas guided in the gas circuit (58) is preferably reduced to a residual content of 0.1 to 5% by volume in relation to the ambient air in the oxygen fraction.
3. Verfahren zur mehrschichtigen Lackbeschichtung von Fadenmaterial (12) wie Leiterdrähten oder Lichtleitfasern bei welchem in einer Transportstrecke (10) zu beschichtendes Fadenmaterial (12) kontinuierlich im Durchlauft transportiert wird und dabei an einer Wärmehärtungsstation (14) mittels einer Heizeinrichtung (22) zur Wärmehärtung einer aufgebrachten lösemittelhaltigen Lackschicht erwärmt wird, dadurch gekennzeichnet, dass das Fadenmaterial (12) an einer UV- Härtungsstation (16) zur UV-Strahlungshärtung einer aufgebrachten lösemittelfreien Lackschicht mit UV-Licht bestrahlt wird. 3. A method for multi-layer lacquer coating of thread material (12), such as conductor wires or optical fibers, in which thread material (12) to be coated is transported continuously in the passage in a transport path (10) and thereby at a heat curing station (14) by means of a heating device (22) for heat curing an applied solvent-containing lacquer layer is heated, characterized in that the thread material (12) is irradiated with UV light at a UV curing station (16) for UV radiation curing of an applied solvent-free lacquer layer.
EP05715358A 2004-02-20 2005-02-17 Arrangement and method for coating a thread-type material with paint in a multi-layer manner Withdrawn EP1715962A2 (en)

Applications Claiming Priority (2)

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DE102004008812A DE102004008812A1 (en) 2004-02-20 2004-02-20 Arrangement and method for multilayer lacquer coating of thread material
PCT/EP2005/001583 WO2005082548A2 (en) 2004-02-20 2005-02-17 Arrangement and method for coating a thread-type material with paint in a multi-layer manner

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