EP1460648B1 - Installation for cable production - Google Patents

Installation for cable production Download PDF

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Publication number
EP1460648B1
EP1460648B1 EP04005049A EP04005049A EP1460648B1 EP 1460648 B1 EP1460648 B1 EP 1460648B1 EP 04005049 A EP04005049 A EP 04005049A EP 04005049 A EP04005049 A EP 04005049A EP 1460648 B1 EP1460648 B1 EP 1460648B1
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EP
European Patent Office
Prior art keywords
tube
induction heating
telescopic
cross
movable
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EP04005049A
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German (de)
French (fr)
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EP1460648A3 (en
EP1460648A2 (en
Inventor
Joachim Jung
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Troester GmbH and Co KG
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Troester GmbH and Co KG
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion

Definitions

  • the invention relates to a plant for the production of cables. consisting of an extrusion device with one or more extruders and a transverse spray head traversed by the conductor or conductors of the cable, behind which an induction heating device is arranged, with a tube for the crosslinking or vulcanization of the extruded jacket layer being connected downstream of the crosshead and the induction heating device connected downstream thereof, which is assembled from several pieces of pipe, of which the next pipe section to the cross-injection head is an access to the cross-head enabling telescopic tube,
  • the core of the cable consists of one or more copper wires, which are surrounded by insulating and / or semiconductor layers, which are supplied by the extruder or the spray head and are formed in the spray head to the one or more insulating layers enveloping the conductors.
  • the vulcanization tube downstream of the spray head, the freshly prepared cable leaving the spray head must be kept at a temperature above the vulcanization temperature of the extruded layers for a certain time. This is done from the outside through Radiation and through the vulcanization located in the hot, mostly gaseous medium.
  • the vulcanization tube may be a pipe sagging in the manner of a horizontally extending chain line, it may also be a vertically positioned pipe, possibly with a deflection point of 180 °.
  • the core of the cable is heated to a temperature above the vulcanization temperature, so that the heat required for the vulcanization is also entered from the inside into the insulating layers.
  • This heat introduced by induction thus shortens the time required for soaking the entire cross section of the cable to the vulcanization temperature and thus also shortens the overall length of the vulcanization tube. Any shortening of the vulcanization tube increases the efficiency of the cable manufacturing plant, lowers the investment costs not only of the plant, but also the machine hall and simplifies their operation.
  • the invention avoids the disadvantages of the prior art. It is the object of the present invention to increase the efficiency of a cable manufacturing plant by measures that provide a shorter length, allow faster heating of the insulating layers for the purpose of vulcanization or networking and easier operation of the system and beyond the access of the machine operator to Facilitate the spray head when changing tools and cleaning.
  • the invention consists in that the induction heating device connected downstream of the cross-injection head is fixed or mounted in or on the movable tube of the telescopic tube and is movable together with this tube, wherein the movable Pipe of the telescopic tube together with the built-in induction heating system in the immovable tube of the telescopic tube into or überiebbar.
  • This arrangement provides the advantage of a shorter construction possibility for the vulcanization tube and improved access to the spray head for cleaning, maintenance and tool replacement work. Because the induction heating of the cable core begins immediately behind the spray head of the extruder. In addition, the advantage is achieved with a retractable into the fixed tube tube that the spritzkopf worne storage of Vulkanisationsrohres can already be done in a place where the movable tube is located in the fixed tube of the telescopic tube. The location of storage thus moves closer to the spray head without reducing the space required for maintenance on the spray head.
  • the induction heating device occupies the entire length of the movable tube, because thereby the conductor heating can be performed more uniformly and effectively.
  • the induction heating device serves to heat the metallic conductors in the cable so that the cable is heated and heated not only by heat sources acting on the outside of the cable, but also from the inside by the heating of the conductors, which then release their heat to the outside in the cable jacket becomes.
  • the movable tube of the telescopic tube is made of a material that is not electrically conductive or as poor as possible, but which is heat-resistant and pressure-resistant.
  • the movable tube of the telescopic tube is made of a carbon fiber composite.
  • the movable tube of the telescopic tube in which or on which the induction heating device is installed, this has to have an outer diameter which is smaller than the inner diameter of the fixed tube.
  • This system according to the invention can be further optimized in that at least one piece of pipe at any point of the fixed tube is made of a material that is electrically non-conductive or as poor as possible, but which is heat-resistant, and is surrounded by an induction heating system.
  • the induction heating device serves to heat the metallic conductors in the cable so that the cable is heated not only by heat sources acting on the outside of the cable, but also from the inside by the heating of the conductors, which then release their heat to the outside of the cable jacket and heated.
  • This additional induction heating device can be installed at any point of the long fixed tube, where just a re-heating of the cable core is necessary or advantageous. So it can also be installed in a place where the extruded cable sheath is already cooled from the outside.
  • This thermal movement may be important for complete crosslinking or vulcanization of the cable sheath, as well as for faster crosslinking or vulcanization of the cable sheath and thus also for a shortening of the entire system.
  • the crosshead is preceded by an induction heating device, which is preferably set to a temperature value below the vulcanization temperature, while the induction heating device downstream of the crosshead is set to a temperature above the vulcanization temperature lies.
  • this induction heating system is used to heat the metallic conductors in the cable, so that the cable not only heated by externally acting on the cable heat sources, but also from the inside by the heating of the conductors, which then release their heat to the outside in the extruded cable sheath and heated.
  • the induction devices act before and immediately behind the spray head, and this integrated with the sliding part of the telescopic tube, to the technical Erfog a shortening of Vulkanisationsrohres together.
  • the induction heating device upstream of the spray head already brings heat into the cable core before it reaches the spray head and the vulcanization tube at all.
  • the extruded insulating material surrounding the cable core in the spray head which at the time of extrusion is at a temperature just below the vulcanization temperature, is thus not cooled by a lower temperature of the cable core but remains at its temperature.
  • the second induction heating device which surrounds the cable core extruded from the inside by the registered in the cable core induction heat, so that evenly over the cable cross-section extending vulcanization sets in very early, because the second Indutechnischserhitzungsvorrides directly located behind the spray head. This location of the second induction heating system is important for a short design of the vulcanization tube.
  • the non-displaceable pipe section of the telescopic pipe-supporting bearing can be arranged at the upper end of the non-slidable pipe section.
  • the non-displaceable pipe section of the telescopic tube in a location to store, which is not covered by the slide-movable pipe section in a deferred state.
  • the plant for the production of cables has an unwinding drum 11, from which the cable core 1 is unwound, via a cable feed unit 12 and various other other processing devices then after passing an upstream induction heating device 4 for preheating the cable core a transverse spray head 2 is fed, extrude into the extruder, not shown, insulation and semiconductor material, which is formed in the crosshead 2 to a sheath of the cable core 1.
  • the cable formed in this way in the crosshead 2 must now be subjected to vulcanization of its insulating and semiconductor layers applied in the crosshead 2. This vulcanization takes place in the vulcanization tube 3, 6, 7 which adjoins the cross-spray head 2 and which is filled with a hot gaseous or vaporous medium.
  • the part of the vulcanization tube closest to the cross-injection head is the displaceable tube part 6, which can be pushed into the non-displaceable tube part 3 of the telescopic tube 3, 6 (FIGS. 2-5) or pushed onto the non-displaceable tube part 3 of the telescopic tube 3, 6 (FIGS ) can be pushed.
  • the gaseous or vaporous medium in the vulcanization tube carries heat from outside into the extrudate surrounding the cable core 1.
  • the vulcanization is significantly accelerated by the fact that the cable core 1 is heated by induction so that heat from the inside lying in the cable core 1 is introduced to the outside surrounding the cable core 1 extrudate.
  • the displaceable telescopic tube piece 6 can be inserted into the immovable telescopic tube piece 3 when carrying out maintenance work on the transverse spraying head 2.
  • the induction heating device 7 is installed here in the interior of the movable telescopic pipe section 6.
  • the displaceable telescopic pipe section 6 is preceded by a control device 9 and together with the displaceable telescopic pipe section 6 slidably.
  • This control device 9 is used to check the position of the cable core 1 in the sheathing extrudate.
  • the induction heating device 16 is fixed externally on the displaceable telescopic pipe section 6 and the unit telescopic pipe section 6 / induction heating device 16 is inserted into the non-telescoping telescopic pipe section 3.
  • the displaceable telescopic tube piece 6 is in this embodiment of a non-conductive material such as carbon fibers, ceramic, plastic or the like. manufactured.
  • the induction heating device 16 is externally mounted on the displaceable telescopic tube section 15 and the unit telescopic tube section 15 / induction heating device 16 can be pushed over the non-displaceable telescopic tube section 3.
  • the sliding telescopic tube section 15 is also in this embodiment of a non-conductive material such as carbon fibers, ceramic, plastic or the like. manufactured.
  • a further induction heating system 13 is additionally installed, which is able to maintain the vulcanization temperature and still increase.
  • This induction heating device 13 may be installed at any point of the long fixed tube, where just a re-heating of the cable core is necessary or advantageous. So it can also be installed in a place where the extruded cable sheath is already cooled from the outside. Then you get a heat movement from the inside lying in the cable core to the outside. This thermal movement may be important for complete crosslinking or vulcanization of the cable sheath, as well as for faster crosslinking or vulcanization of the cable sheath and thus also for a shortening of the entire system.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Insulated Conductors (AREA)

Abstract

The spray coating system covers an electrically conducting cable core with an insulating layer. The cable core (1) is drawn from a supply drum by a belt drive mechanism (12). The cable core is coated by passing through an induction heater (4), followed by an extrusion head (2) and a control module (9). The cable passes into a further induction heater section (6,7) and a telescopic sheath (3). There is a final induction heater (13) beyond the end of the sheath.

Description

Die Erfindung betrifft eine Anlage zur Herstellung von Kabeln. bestehend aus einer Extrusionsvorrichtung mit einem oder mehreren Extrudern und einem von dem oder den Leitern des Kabels durchlaufenen Querspritzkopf, hinter dem eine Induktionserhitzungsvorrichtung angeordnet ist, wobei dem Querspritzkopf und der ihm nachgeschalteten Induktionserhitzungsvorrichtung ein Rohr für die Vernetzung bzw. Vulkanisation der extrudierten Mantelschicht nachgeschaltet ist, das aus mehrern Rohrstücken zusammengebaut ist, von denen das dem Querspritzkopf nächste Rohrstück ein Zugang zum Querspritzkopf ermöglichendes Teleskoprohr ist,The invention relates to a plant for the production of cables. consisting of an extrusion device with one or more extruders and a transverse spray head traversed by the conductor or conductors of the cable, behind which an induction heating device is arranged, with a tube for the crosslinking or vulcanization of the extruded jacket layer being connected downstream of the crosshead and the induction heating device connected downstream thereof, which is assembled from several pieces of pipe, of which the next pipe section to the cross-injection head is an access to the cross-head enabling telescopic tube,

Hierbei besteht die Seele des Kabels aus einem oder mehreren Kupferdrähten, die von lsolier- und/oder Halbleiterschichten umgeben sind, die von dem oder den Extrudern dem Spritzkopf zugeführt sind und im Spritzkopf zu der oder den die Leiter ummantelnden Isolierschichten ausgeformt sind.In this case, the core of the cable consists of one or more copper wires, which are surrounded by insulating and / or semiconductor layers, which are supplied by the extruder or the spray head and are formed in the spray head to the one or more insulating layers enveloping the conductors.

Eine derartige Anlage ist durch verschiedene Vorbenutzungen bekannt geworden. In dem dem Spritzkopf nachgeschalteten Vulkanisationsrohr muß das den Spritzkopf verlassende, frisch hergestellte Kabel über eine bestimmte Zeit auf einer über der Vulkanisationstemperatur der extrudierten Schichten liegenden Temperatur gehalten werden. Das erfolgt von außen her durch Strahlung und durch das im Vulkanisationsrohr befindliche heisse, meist gasförmige Medium. Das Vulkanisationsrohr kann ein nach Art einer in horizontaler Richtung sich erstreckenden Kettenlinie durchhängendes Rohr sein, es kann auch ein vertikal aufgestelltes Rohr, eventuell mit einer Umlenkstelle um 180°, sein.Such a system has become known through various previous uses. In the vulcanization tube downstream of the spray head, the freshly prepared cable leaving the spray head must be kept at a temperature above the vulcanization temperature of the extruded layers for a certain time. This is done from the outside through Radiation and through the vulcanization located in the hot, mostly gaseous medium. The vulcanization tube may be a pipe sagging in the manner of a horizontally extending chain line, it may also be a vertically positioned pipe, possibly with a deflection point of 180 °.

Mit der Induktionserhitzung wird die Seele des Kabels auf eine Temperatur über der Vulkanisationstemperatur erhitzt, so daß die für die Vulkanisation benötigte Wärme auch von innen her in die Isolierschichten eingetragen wird. Diese durch Induktion eingetragene Wärme verkürzt somit die Zeit, welche für das Durchwärmen des gesamten Querschnitts des Kabels auf die Vulkanisationstemperatur benötigt wird und verkürzt damit auch die Baulänge des Vulkanisationsrohres. Jede mögliche Verkürzung des Vulkanisationsrohres erhöht die Wirtschaftlichkeit der Kabelherstellungsanlage, erniedrigt die Investitionskosten nicht nur der Anlage, sondern auch der Maschinenhalle und vereinfacht deren Betrieb.With the induction heating, the core of the cable is heated to a temperature above the vulcanization temperature, so that the heat required for the vulcanization is also entered from the inside into the insulating layers. This heat introduced by induction thus shortens the time required for soaking the entire cross section of the cable to the vulcanization temperature and thus also shortens the overall length of the vulcanization tube. Any shortening of the vulcanization tube increases the efficiency of the cable manufacturing plant, lowers the investment costs not only of the plant, but also the machine hall and simplifies their operation.

Die Erfindung vermeidet die Nachteile des Standes der Technik. Es ist die Aufgabe der vorliegenden Erfindung, die Wirtschaftlichkeit einer Kabelherstellungsanlage durch Maßnahmen zu erhöhen, die eine kürzere Baulänge erbringen, eine schnellere Durchwärmung der Isolierschichten zum Zwecke der Vulkanisation oder der Vernetzung und einen einfacheren Betrieb der Anlage ermöglichen und darüber hinaus den Zutritt des Maschinenführers zum Spritzkopf bei einem Werkzeugwechsel und bei Reinigungsarbeiten erleichtern.The invention avoids the disadvantages of the prior art. It is the object of the present invention to increase the efficiency of a cable manufacturing plant by measures that provide a shorter length, allow faster heating of the insulating layers for the purpose of vulcanization or networking and easier operation of the system and beyond the access of the machine operator to Facilitate the spray head when changing tools and cleaning.

Die Erfindung besteht darin, daß die dem Querspritzkopf nachgeschaltete Induktionserhitzungsvorrichtung in oder an das bewegliche Rohr des Teleskoprohres fest ein- oder angebaut ist und zusammen mit diesem Rohr bewegbar ist, wobei das bewegliche Rohr des Teleskoprohres mitsamt der eingebauten Induktionserhitzungsanlage in das unbewegliche Rohr des Teleskoprohres hinein oder überschiebbar ist.The invention consists in that the induction heating device connected downstream of the cross-injection head is fixed or mounted in or on the movable tube of the telescopic tube and is movable together with this tube, wherein the movable Pipe of the telescopic tube together with the built-in induction heating system in the immovable tube of the telescopic tube into or überiebbar.

Diese Anordnung erbringt den Vorteil einer kürzeren Baumöglichkeit für das Vulkanisationsrohr und eines verbesserten Zuganges zum Spritzkopf für Reinigungs-, Wartungs- und Werkzeugtauscharbeiten. Denn die Induktionserhitzung der Kabelseele beginnt unmittelbar hinter dem Spritzkopf des Extruders. Darüber hinaus wird bei einem in das feststehende Rohr einschiebbaren Rohr der Vorteil erzielt, daß die spritzkopfseitige Lagerung des Vulkanisationsrohres bereits an einem Ort erfolgen kann, an dem sich das bewegliche Rohr im feststehenden Rohr des Teleskoprohres befindet. Der Ort der Lagerung rückt damit näher an den Spritzkopf heran, ohne den für die Wartung benötigten Raum am Spritzkopf zu verkleinern.This arrangement provides the advantage of a shorter construction possibility for the vulcanization tube and improved access to the spray head for cleaning, maintenance and tool replacement work. Because the induction heating of the cable core begins immediately behind the spray head of the extruder. In addition, the advantage is achieved with a retractable into the fixed tube tube that the spritzkopfseitige storage of Vulkanisationsrohres can already be done in a place where the movable tube is located in the fixed tube of the telescopic tube. The location of storage thus moves closer to the spray head without reducing the space required for maintenance on the spray head.

Dabei ist es vorteilhaft, daß die Induktionserhitzungsvorrichtung die gesamte Länge des beweglichen Rohres einnimmt, weil dadurch die Leitererhitzung gleichmäßiger und wirkungsvoller durchgeführt werden kann.It is advantageous that the induction heating device occupies the entire length of the movable tube, because thereby the conductor heating can be performed more uniformly and effectively.

Die Induktionserhitzungsvorrichtung dient der Erwärmung der metallischen Leiter im Kabel, so daß das Kabel nicht nur durch von außen auf das Kabel einwirkende Wärmequellen, sondern auch von innen durch die Erwärmung der Leiter, die dann ihre Wärme nach außen in die Kabelummantelung abgeben, erwärmt und erhitzt wird.The induction heating device serves to heat the metallic conductors in the cable so that the cable is heated and heated not only by heat sources acting on the outside of the cable, but also from the inside by the heating of the conductors, which then release their heat to the outside in the cable jacket becomes.

Um die energetischen Verluste der Induktionsheizung möglichst gering zu halten, ist es vorteilhaft, wenn das bewegliche Rohr des Teleskoprohres aus einem elektrisch nicht oder möglichst schlecht leitendem Material gefertgt ist, das aber hitzebeständig und druckfest ist.In order to keep the energetic losses of the induction heating as low as possible, it is advantageous if the movable tube of the telescopic tube is made of a material that is not electrically conductive or as poor as possible, but which is heat-resistant and pressure-resistant.

Dabei ist es praktisch, wenn das bewegliche Rohr des Teleskoprohres aus einem Kohlefaserverbundstoff gefertigt ist.It is practical if the movable tube of the telescopic tube is made of a carbon fiber composite.

Bei einer erfindungsgemäßen Anlage, bei der das bewegliche Rohr des Teleskoprohres, in das oder auf das die Induktionserhitzungsvorrichtung eingebaut ist, hat dieses einen Außendurchmesser aufzuweisen, welcher kleiner als der Innendurchmesser des feststehenden Rohres ist.In a plant according to the invention, in which the movable tube of the telescopic tube, in which or on which the induction heating device is installed, this has to have an outer diameter which is smaller than the inner diameter of the fixed tube.

Hingegen hat bei einer Anlage, bei der das bewegliche Rohr des Teleskoprohres, auf dessen Außenfläche oder in das die Induktionserhitzungsvorrichtung auf- oder eingebaut ist, einen Innendurchmesser aufzuweisen, welcher größerer als der Außendurchmesser des feststehenden Rohres ist.On the other hand, in a plant in which the movable tube of the telescopic tube, on its outer surface or in which the induction heating device is built or built to have an inner diameter which is larger than the outer diameter of the fixed tube.

Diese erfindungsgemäße Anlage kann weiter dadurch optimiert werden, daß mindestens ein Rohrstück an beliebiger Stelle des feststehenden Rohres aus einem elektrisch nicht oder möglichst schlecht leitendem Material gefertgt ist, das aber hitzebeständig ist, und von einer Induktionserhitzungsanlage umgeben ist.This system according to the invention can be further optimized in that at least one piece of pipe at any point of the fixed tube is made of a material that is electrically non-conductive or as poor as possible, but which is heat-resistant, and is surrounded by an induction heating system.

Auch hier dient die Induktionserhitzungsvorrichtung der Erwärmung der metallischen Leiter im Kabel, so daß das Kabel nicht nur durch von außen auf das Kabel einwirkende Wärmequellen, sondern auch von innen durch die Erwärmung der Leiter, die dann ihre Wärme nach außen in die Kabelummantelung abgeben, erwärmt und erhitzt wird.Again, the induction heating device serves to heat the metallic conductors in the cable so that the cable is heated not only by heat sources acting on the outside of the cable, but also from the inside by the heating of the conductors, which then release their heat to the outside of the cable jacket and heated.

Diese zusätzliche Induktionserhitzungsvorrichtung kann an beliebiger Stelle des langen feststehenden Rohres eingebaut sein, wo eben eine erneute Erhitzung der Kabelseele notwendig oder vorteilhaft ist. So kann sie auch an einer Stelle eingebaut sein, wo der extrudierte Kabelmantel bereits von außen gekühlt wird.This additional induction heating device can be installed at any point of the long fixed tube, where just a re-heating of the cable core is necessary or advantageous. So it can also be installed in a place where the extruded cable sheath is already cooled from the outside.

Dann erzielt man eine Wärmebewegung von der innen im Kabel liegenden Kabelseele nach außen. Diese Wärmebewegung kann für eine vollständige Vernetzung bzw. Vulkanisation des Kabelmantels von Bedeutung sein, ebenso für eine schnellere Vernetzung bzw. Vulkanisation des Kabelmantels und somit auch für eine Verkürzung der gesamten Anlage.Then you get a heat movement from the inside lying in the cable core to the outside. This thermal movement may be important for complete crosslinking or vulcanization of the cable sheath, as well as for faster crosslinking or vulcanization of the cable sheath and thus also for a shortening of the entire system.

Dadurch läßt sich der Leiter im Inneren des Kabelstranges, der auf seinem Weg bis zu dieser Stelle Wärme verloren hat, während das ihn umgebende isolierende Extrudat an Festigkeit durch Vulkanisation bzw. Vernetzung gewonnen hat, noch einmal nacherhitzen, wobei die Nacherhitzungstemperatur höher als die vorher eingeleiteten Temperaturen sein kann, da schon eine Teilvulkanisationn bzw. Teilvernetzung stattgefunden, so daß das Extrudat an dieser Stelle schon nicht mehr so empfindlich gegen durch die Schwerkraft verursachten Verformungen ist. Diese hier an dieser Stelle vorgenommene Nacherhitzung fördert und beschleunigt die Vulkanisation bzw. Vernetzung beträchtlich.As a result, the conductor inside the cable harness, which has lost heat on its way to this point, while the surrounding insulating extrudate has gained strength through vulcanization or crosslinking, reheat again, the post-heating temperature higher than previously introduced Temperatures may be, as already a Teilvulkanisationn or partial crosslinking took place, so that the extrudate at this point is no longer so sensitive to deformation caused by gravity. This post-heating carried out here at this point promotes and accelerates the vulcanization or cross-linking considerably.

Für den Verfahrensablauf kann es sehr förderlich sein, wenn dem Querspritzkopf eine Induktionserhitzungsvorrichtung vorgeschaltet ist, die vorzugsweise auf einen Temperaturwert eingestellt ist, der unter der Vulkanisationstemperatur liegt, während die dem Querspritzkopf nachgeschaltete Induktionserhitzungsvorrichtung für die Erhitzung auf einen Temperaturwert eingestellt ist, der über der Vulkanisationstemperatur liegt.For the process flow, it can be very beneficial if the crosshead is preceded by an induction heating device, which is preferably set to a temperature value below the vulcanization temperature, while the induction heating device downstream of the crosshead is set to a temperature above the vulcanization temperature lies.

Auch diese Induktionserhitzungsanlage dient der Erwärmung der metallischen Leiter im Kabel, so daß das Kabel nicht nur durch von außen auf das Kabel einwirkende Wärmequellen, sondern auch von innen durch die Erwärmung der Leiter, die dann ihre Wärme nach außen in die aufextrudierte Kabelummantelung abgeben, erwärmt und erhitzt wird.Also, this induction heating system is used to heat the metallic conductors in the cable, so that the cable not only heated by externally acting on the cable heat sources, but also from the inside by the heating of the conductors, which then release their heat to the outside in the extruded cable sheath and heated.

So wirken die Induktionsvorrichtungen vor und unmittelbar hinter dem Spritzkopf, und diese mit dem verschiebbaren Teil des Teleskoprohres integriert, zu dem technischen Erfog einer Verkürzung des Vulkanisationsrohres zusammen.Thus, the induction devices act before and immediately behind the spray head, and this integrated with the sliding part of the telescopic tube, to the technical Erfog a shortening of Vulkanisationsrohres together.

Die dem Spritzkopf vorgeschaltete Induktionserhitzungsvorrichtung bringt bereits Wärme in die Kabelseele, bevor diese den Spritzkopf und das Vulkanisationsrohr überhaupt erreicht. Das im Spritzkopf die Kabelseele ummantelnde extrudierte Isoliermaterial, das sich zum Zeitpunkt der Extrusion auf einer Temperatur kurz unterhalb der Vulkanisationstemperatur befindet, wird somit durch eine niedrigere Temperatur der Kabelseele nicht abgekühlt, sondern verbleibt auf seiner Temperatur. Unmittelbar hinter dem Spritzkopf wird aber durch die zweite Induktionserhitzungsvorrichtung,das das die Kabelseele ummantelnde Extrudat von innen her durch die in die Kabelseele eingetragene Induktionswärme stark erhitzt, so daß eine sich über den Kabelquerschnitt gleichmäßig erstreckende Vulkanisation sehr frühzeitig einsetzt, weil sich die zweite Induktionserhitzungsvorrrichtung unmittelbar hinter dem Spritzkopf befindet. Diese örtliche Lage der zweiten Induktionserhitzungsanlage ist für eine kurze Bauform des Vulkanisationsrohres wichtig.The induction heating device upstream of the spray head already brings heat into the cable core before it reaches the spray head and the vulcanization tube at all. The extruded insulating material surrounding the cable core in the spray head, which at the time of extrusion is at a temperature just below the vulcanization temperature, is thus not cooled by a lower temperature of the cable core but remains at its temperature. Immediately behind the spray head but is strongly heated by the second induction heating device, which surrounds the cable core extruded from the inside by the registered in the cable core induction heat, so that evenly over the cable cross-section extending vulcanization sets in very early, because the second Induktionserhitzungsvorrrichtung directly located behind the spray head. This location of the second induction heating system is important for a short design of the vulcanization tube.

Bei einer Anlage, bei der das beweglichem Rohrstück in das unverschiebbare Rohrstück einschiebbar ist, kann das das unverschiebbare Rohrstück des Teleskoprohres halternde Lager am oberen Ende des unverschiebaren Rohrstückes angeordnet sein.In a system in which the movable pipe section can be inserted into the non-displaceable pipe section, the non-displaceable pipe section of the telescopic pipe-supporting bearing can be arranged at the upper end of the non-slidable pipe section.

Hingegen ist bei einer Anlage, bei der das bewegliche Rohrstück auf das unverschiebbare Rohrstück aufschiebbar ist, das unverschiebbare Rohrstück des Teleskoprohres an einem Ort, zu lagern, der von dem aufschiebbarem beweglichen Rohrstück in aufgeschobenem Zustand nicht überdeckt ist.On the other hand, in a system in which the movable pipe piece can be pushed onto the non-displaceable pipe section, the non-displaceable pipe section of the telescopic tube in a location to store, which is not covered by the slide-movable pipe section in a deferred state.

Weiterhin ist es aus baulichen Gründen vortelhaft, daß an dem beweglichen Rohrteil ein Stecker angebracht ist, welcher in am Spritzkopf befestigte Kontakte greift, wenn der bewegliche Rohrteil an den Spritzkopf herangeschoben ist.Furthermore, it is for structural reasons vortelhaft that on the movable tube part, a plug is attached, which engages in the spray head mounted contacts when the movable tube part is pushed up to the spray head.

Das Wesen der Erfindung ist anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispieles näher erläutert. Es zeigen:

Fig.1
die Gesamtanlage
Fig 2
den Kopf einer Anlage mit in das feststehende Rohr einschiebbarem Teleskoprohr und einer im Inneren des Teleskoprohres angeordneten Induktionsvorrichtung im Betriebszustand.
Fig 3
den Kopf der Anlage der Fig.2 im Wartungszustand.
Fig 4
den Kopf einer Anlage mit in das feststehende Rohr einschiebbarem Teleskoprohr und einer außen an dem Teleskoprohr angeordneten Induktionsvorrichtung im Betriebszustand.
Fig 5
den Kopf der Anlage der Fig.4 im Wartungszustand.
Fig 6
den Kopf einer Anlage mit auf das feststehende Rohr aufschiebbarem Teleskoprohr und einer außen an dem Teleskoprohr angeordneten Induktionsvorrichtung im Betriebszustand.
Fig 7
den Kopf der Anlage der Fig.4 im Wartungszustand.
The essence of the invention is explained in more detail with reference to an embodiment schematically illustrated in the drawing. Show it:
Fig.1
the entire system
Fig. 2
the head of a system with telescopic tube insertable into the fixed tube and an induction device arranged in the interior of the telescopic tube in the operating state.
Fig. 3
the head of the system of Figure 2 in the maintenance state.
Fig. 4
the head of a system with telescopic tube which can be inserted into the fixed tube and an induction device arranged externally on the telescopic tube in the operating state.
Fig. 5
the head of the system of Figure 4 in the maintenance state.
Fig. 6
the head of a plant with telescopic tube which can be pushed onto the fixed tube and an induction device arranged externally on the telescope tube in the operating state.
Fig. 7
the head of the system of Figure 4 in the maintenance state.

Die Anlage zur Herstellung von Kabeln weist eine Abwickeltrommel 11 auf, von der die Kabelseele 1 abgewickelt wird, über eine Kabelvorschubeinheit 12 und diverse andere andere Bearbeitungsvorrichtungen dann nach Passieren einer vorgeschalteten Induktionserhitzungsvorrichtung 4 zur Vorerwärmung der Kabelseele einem Querspritzkopf 2 zugeführt wird, in den nicht dargestellte Extruder Isolations- und Halbleitermaterial hineinextrudieren, welches in dem Querspritzkopf 2 zu einer Ummantelung der Kabelseele 1 ausgeformt wird. Das auf diese Weise im Querspritzkopf 2 geformte Kabel muß nun einer Vulkanisation seiner im Querspritzkopf 2 aufgebrachten Isolier- und Halbleiterschichten unterzogen werden. Diese Vulkanisation erfolgt in dem an den Querspritzkopf 2 anschliessenden Vulkanisationsrohr 3,6,7, welches mit einem heißen gas- oder dampfförmigen Medium gefüllt ist. Der dem Querspritzkopf nächstgelegene Teil des Vulkanisationsrohres ist das verschiebbare Rohrteil 6, das in den unverschiebbaren Rohrteil 3 des Teleskoprohres 3,6 einschiebbar (Fig. 2-5) oder auf den unverschiebbaren Rohrteil 3 des Teleskoprohres 3,6 einschiebbar (Fig. 6,7) aufschiebbar ist. Das gasoder dampfförmige Medium im Vulkanisationsrohr trägt von außen her Wärme in das die Kabelseele 1 umgebende Extrudat. Die Vulkanisation wird jedoch dadurch wesentlich beschleunigt, daß auch die Kabelseele 1 durch Induktion so erwärmt wird, daß Wärme von der innen im Kabel liegenden Kabelseele 1 nach außen in das die Kabelseele 1 umgebende Extrudat eingeführt wird. So gelangt Wärme von innen und von außen in das Extrudat, so daß sich die Temperatur im Querschnitt der Isolationsund Halbleiterschichten rasch vergleichmäßigt und über die Vulkanisationstemperatur steigt und auf dieser Temperatur gehalten wird. Die Einführung dieser Induktionswärme in die Kabelseele erfofgt durch zwei Induktionserhitzungsvorrichtungen: Die eine Induktionserhitzungsvorrichtung 4, die vom Generator 5 gespeist ist, ist dem Quersprizkopf 2 vorgeschaltet und erhitzt die Kabelseele 1 bereits vor der Ummantelung auf eine Temperatur kurz unter der Vulkanisationstemperatur, die andere Induktionserhitzungsvorrichtung 7, gespeist vom Generator 8, ist dem Querspritzkopf 2 nachgeschaltet und erhitzt die Kabelseele 1 auf eine Temperatur über die Vulkanisationstemperatur, so daß von der Kabelseele 2 Wärme in das Extrudat 6 wandert. Die nachgeschaltete Induktionserhitzungsvorrichtung 7 ist in dem verschiebbaren Rohrstück 6 des Teleskoprohres 3,6 untergebracht.The plant for the production of cables has an unwinding drum 11, from which the cable core 1 is unwound, via a cable feed unit 12 and various other other processing devices then after passing an upstream induction heating device 4 for preheating the cable core a transverse spray head 2 is fed, extrude into the extruder, not shown, insulation and semiconductor material, which is formed in the crosshead 2 to a sheath of the cable core 1. The cable formed in this way in the crosshead 2 must now be subjected to vulcanization of its insulating and semiconductor layers applied in the crosshead 2. This vulcanization takes place in the vulcanization tube 3, 6, 7 which adjoins the cross-spray head 2 and which is filled with a hot gaseous or vaporous medium. The part of the vulcanization tube closest to the cross-injection head is the displaceable tube part 6, which can be pushed into the non-displaceable tube part 3 of the telescopic tube 3, 6 (FIGS. 2-5) or pushed onto the non-displaceable tube part 3 of the telescopic tube 3, 6 (FIGS ) can be pushed. The gaseous or vaporous medium in the vulcanization tube carries heat from outside into the extrudate surrounding the cable core 1. However, the vulcanization is significantly accelerated by the fact that the cable core 1 is heated by induction so that heat from the inside lying in the cable core 1 is introduced to the outside surrounding the cable core 1 extrudate. Thus, heat enters the extrudate from the inside and from the outside, so that the temperature in the cross section of the insulation and semiconductor layers is rapidly equalized and rises above the vulcanization temperature and is kept at this temperature. The introduction of this induction heat in the cable core erfofgt by two induction heating devices: The one induction heating device 4, which is fed by the generator 5, is the cross-injection head 2 upstream and heated the cable core 1 before the jacket to a temperature just below the vulcanization, the other induction heating device. 7 , fed by the generator 8, the cross-head 2 is connected downstream and heats the cable core 1 to a temperature above the vulcanization temperature, so that from the cable core 2 heat migrates into the extrudate 6. The downstream Induction heating device 7 is housed in the displaceable pipe section 6 of the telescopic tube 3.6.

Das verschiebbare Teleskoprohrstück 6 ist in der Ausführung der Fig. 2 und 3 in das unbewegliche Teleskoprohrstück 3 bei der Durchführung von Wartungsarbeiten am Querspritzkopf 2 einschiebbar. Die Induktionserhitzungsvorrichtung 7 ist hier in das Innere des beweglichen Teleskoprohrstückes 6 eingebaut.In the embodiment of FIGS. 2 and 3, the displaceable telescopic tube piece 6 can be inserted into the immovable telescopic tube piece 3 when carrying out maintenance work on the transverse spraying head 2. The induction heating device 7 is installed here in the interior of the movable telescopic pipe section 6.

Dem verschiebbaren Teleskoprohrstück 6 ist eine Kontrollvorrichtung 9 vorgeschaltet und mit dem verschiebbaren Teleskoprohrstück 6 zusammen verschiebbar. Diese Kontrollvorrichtung 9 dient der Prüfung der Lage der Kabelseele 1 im ummantelnden Extrudat.The displaceable telescopic pipe section 6 is preceded by a control device 9 and together with the displaceable telescopic pipe section 6 slidably. This control device 9 is used to check the position of the cable core 1 in the sheathing extrudate.

In der Ausführungsform der Figuren 4 und 5 ist außen auf das verschiebbare Teleskoprohrstück 6 die Induktionserhitzungsvorrichtung 16 fest aufgebracht und die Einheit Teleskoprohrstück 6 / Induktionserhitzungsvorrichtung 16 ist in das unverschiebbare Teleskoprohrstück 3 einschiebbar. Das verschiebbare Teleskoprohrstück 6 ist in dieser Ausführungsform aus einem nichtleitenden Material wie Kohlefasern, Keramik, Kunststoff odgl. gefertigt.In the embodiment of Figures 4 and 5, the induction heating device 16 is fixed externally on the displaceable telescopic pipe section 6 and the unit telescopic pipe section 6 / induction heating device 16 is inserted into the non-telescoping telescopic pipe section 3. The displaceable telescopic tube piece 6 is in this embodiment of a non-conductive material such as carbon fibers, ceramic, plastic or the like. manufactured.

In der Ausführungsform der Figuren 6 und 7 ist außen auf das verschiebbare Teleskoprohrstück 15 die Induktionserhitzungsvorrichtung 16 fest angebaut und die Einheit Teleskoprohrstück 15 / Induktionserhitzungsvorrichtung 16 ist über das unverschiebbare Teleskoprohrstück 3 überschiebbar. Das verschiebbare Teleskoprohrstück 15 ist auch in dieser Ausführungsform aus einem nichtleitenden Material wie Kohlefasern, Keramik, Kunststoff odgl. gefertigt.In the embodiment of Figures 6 and 7, the induction heating device 16 is externally mounted on the displaceable telescopic tube section 15 and the unit telescopic tube section 15 / induction heating device 16 can be pushed over the non-displaceable telescopic tube section 3. The sliding telescopic tube section 15 is also in this embodiment of a non-conductive material such as carbon fibers, ceramic, plastic or the like. manufactured.

Das in der Praxis sehr lange Vulkanisationsrohr 3, das in der Zeichnung Fig.1 gezeigt ist und von dem in den folgenden Fig. in der Zeichnung nur der vorderste Teil gezeigt ist, muß gelagert sein. Hierzu dient das Lager 10, welches den unbeweglichen Teil 3 des Teleskoprohres 3,6 abstützt. Durch den Einbau der Induktionserhitzungsanlage 7 in den beweglichen Teil 6 des Teleskoprohres 3,6 kann das Lager 10 erheblich dichter an den Querspritzkopf 2 herangerückt werden als dieses beim Stand der Technik möglich war.The very long in practice Vulkanisationsrohr 3, which is shown in the drawing Fig.1 and of which in the following Fig. In the drawing, only the foremost part is shown, must be stored. For this purpose, the bearing 10, which supports the immovable part 3 of the telescopic tube 3.6. By installing the induction heating system 7 in the movable part 6 of the telescopic tube 3.6, the bearing 10 can be moved considerably closer to the transverse spray head 2 than was possible in the prior art.

In diesem in der Praxis sehr langen Vulkanisationsrohr 3 ist zusätzlich noch eine weitere Induktionserhitzungsanlage 13 eingebaut, die die Vulkanisationstemperatur aufrechterhalten und noch zu erhöhen vermag. Diese Induktionserhitzungsvorrichtung 13 kann an beliebiger Stelle des langen feststehenden Rohres eingebaut sein, wo eben eine erneute Erhitzung der Kabelseele notwendig oder vorteilhaft ist. So kann sie auch an einer Stelle eingebaut sein, wo der extrudierte Kabelmantel bereits von außen gekühlt wird. Dann erzielt man eine Wärmebewegung von der innen im Kabel liegenden Kabelseele nach außen. Diese Wärmebewegung kann für eine vollständige Vernetzung bzw. Vulkanisation des Kabelmantels von Bedeutung sein, ebenso für eine schnellere Vernetzung bzw. Vulkanisation des Kabelmantels und somit auch für eine Verkürzung der gesamten Anlage.In this very long in practice vulcanization tube 3, a further induction heating system 13 is additionally installed, which is able to maintain the vulcanization temperature and still increase. This induction heating device 13 may be installed at any point of the long fixed tube, where just a re-heating of the cable core is necessary or advantageous. So it can also be installed in a place where the extruded cable sheath is already cooled from the outside. Then you get a heat movement from the inside lying in the cable core to the outside. This thermal movement may be important for complete crosslinking or vulcanization of the cable sheath, as well as for faster crosslinking or vulcanization of the cable sheath and thus also for a shortening of the entire system.

Während die Zeichnung nur Beispiele eines nach Art eines im Wesentlichen horizontalen Kettenlinie verlaufenden Vernetzungs- bzw. Vulkanisationsrohres zeigt, ist die Erfindung aber auch für vertikal stehende Vernetzungs- bzw. Vulkanisationsrohre anwendbar.While the drawing shows only examples of a cross-linking or vulcanization tube running in the manner of a substantially horizontal catenary, the invention can also be applied to vertically standing vulcanization tubes.

Liste der BezugszeichenList of reference numbers

11
Kabelseelecable core
22
QuerspritzkopfCrosshead
33
fester Teil des Teleskoprohresfixed part of the telescopic tube
44
vorgeschaltete Induktionserhitzungsvorrichtungupstream induction heating device
55
Generatorgenerator
66
verschiebbarer Teil des Teleskoprohressliding part of the telescopic tube
77
nachgeschaltete, in das verschiebbare Teleskoprohr eingebaute Induktionserhitzungsanlagedownstream, installed in the sliding telescopic tube induction heating system
88th
Generatorgenerator
99
Kontrollvorrichtungcontrol device
1010
Lagercamp
1111
Abwickeltrommelunwinding
1212
Kabel-VorschubeinheitCable feed unit
1313
InduktionserhitzungsvorrichtungInduction heating device
1414
bewegliches über das feststehende Rohr überschiebbares Teleskoprohrstückmovable telescopic tube piece which can be pushed over the fixed tube
1515
Induktionserhitzungsvorrichtung, angebaut an das bewegliche überschiebbare TeleskoprohrstückInduction heating device mounted on the movable telescopic telescopic tube
1616
Induktionserhitzungsvorrichtung, angebaut an das bewegliche einschiebbare Teleskoprohrstück.Induction heating device, attached to the movable retractable telescopic tube.

Claims (11)

  1. System for producing cables, consisting of an extrusion device with one or more extruders and a cross-head through which the conductor or conductors of the cable pass, behind which an induction heating system is arranged, a tube for the cross-linking or vulcanisation of the extruded jacket layer being connected downstream from the cross-head and the induction heating system downstream therefrom, the tube being assembled from a plurality of tube pieces, of which the tube piece closest to the cross-head is a telescopic tube allowing access to the cross-head, characterised in that the induction heating system (7) downstream from the cross-head (2) is rigidly Installed into or onto the movable tube (6) of the telescopic tube (3, 6) and can be moved together with this tube (6), wherein it is possible to slide the movable tube (6) of the telescopic tube (3, 6) together with the installed induction heating system (7) into or over the immobile tube (3) of the telescopic tube (3, 5).
  2. System according to claim 1, characterised in that the fixed part (6) of the telescopic tube (3, 6) is a substantially horizontally extending tube which is slack in the manner of a chain line,
  3. System according to claim 1, characterised in that the induction heating system extends over the entire length of the movable tube.
  4. System according to claim 1, characterised in that the movable tube (6) of the telescopic tube (3. 6) is manufactured from an electrically non-conductive or as far as possible poorly conducting material, which is pressure-resistant and heat-resistant.
  5. System according to claim 4, characterised in that the movable tube (6) of the telescopic tube (3,6) is manufactured from a carbon fibre composite.
  6. System according to claim 1, characterised in that the movable tube (6) of the telescopic tube (3, 6), in which the induction heating device (7) is installed, or on which the induction heating device (7) is installed, has an external diameter together with the induction heating device (7) which is smaller than the internal diameter of the fixed tube (3).
  7. System according to claim 1, characterised in that the movable tube (6) of the telescopic tube (3, 6), on the external surface of which the induction heating system (7) is installed, has an internal diameter, which is greater than the external diameter of the fixed tube (3).
  8. System according to claim 1, characterised in that at least one tube piece of the fixed tube (3) is produced at any point of the fixed tube (3) from an electrically non-conductive or as far as possible poorly conducting material, which is, however, pressure-resistant and heat-resistant and is surrounded by an induction heating device (13).
  9. System according to claim 1, characterised in that an induction heating device (4) is connected upstream from the cross-head (2), in that the induction heating device (4) upstream from the cross-hand (2) is preferably adjusted for heating to a temperature value, which is below the vulcanisation temperature, while the induction heating system connected downstream from the cross-head (2) is adjusted to a temperature value for heating, which is above the vulcanisation temperature.
  10. System according to claim 1, characterised in that in a system with a movable tube piece (8) which can be inserted into the non-displaceable tube piece (3), the non-displaceable tube piece (3) of the telescopic tube (3, 6) is provided with a bearing (10) with which the upper part of the whole vulcanisation tube is mounted.
  11. System according to claim 1, characterised in that in a system with a movable tube piece (14) which can be slid onto the non-displaceable tube piece (3), the non-displecouble tube piece (3) of the telescopic tube (3, 6) is provided, at a location, which is not covered by the movable tube piece (14), which can be slid on, in the state in which it has been slid on, with a bearing (10), with which the upper part of the whole vulcanisation tube (3) is mounted.
EP04005049A 2003-03-17 2004-03-04 Installation for cable production Expired - Lifetime EP1460648B1 (en)

Applications Claiming Priority (2)

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DE10311512A DE10311512B3 (en) 2003-03-17 2003-03-17 Plant for the production of cables
DE10311512 2003-03-17

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EP1460648A3 EP1460648A3 (en) 2006-06-07
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AT (1) ATE371934T1 (en)
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EP2755211B1 (en) 2013-01-09 2019-03-06 Maillefer S.A. Method and arrangement of crosslinking or vulcanizing an elongate element

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DE102014010123A1 (en) 2014-07-09 2016-01-14 Leoni Kabel Holding Gmbh Crosslinkable composition

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US20040234640A1 (en) 2004-11-25
DE10311512B3 (en) 2004-11-04
DE502004004785D1 (en) 2007-10-11
ATE371934T1 (en) 2007-09-15
EP1460648A3 (en) 2006-06-07
US7168934B2 (en) 2007-01-30
ES2290568T3 (en) 2008-02-16
EP1460648A2 (en) 2004-09-22

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