EP3158126B1 - Method for coating a tension member, and use thereof - Google Patents

Method for coating a tension member, and use thereof Download PDF

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Publication number
EP3158126B1
EP3158126B1 EP15723886.6A EP15723886A EP3158126B1 EP 3158126 B1 EP3158126 B1 EP 3158126B1 EP 15723886 A EP15723886 A EP 15723886A EP 3158126 B1 EP3158126 B1 EP 3158126B1
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EP
European Patent Office
Prior art keywords
tension member
cable
coating
compressing
construction
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EP15723886.6A
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German (de)
French (fr)
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EP3158126A1 (en
Inventor
Florian LOTZ
Marius DREIER
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ContiTech Transportbandsysteme GmbH
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ContiTech Transportbandsysteme GmbH
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Publication of EP3158126A1 publication Critical patent/EP3158126A1/en
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Classifications

    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/16—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
    • D07B7/02—Machine details; Auxiliary devices
    • D07B7/14—Machine details; Auxiliary devices for coating or wrapping ropes, cables, or component strands thereof
    • D07B7/145—Coating or filling-up interstices
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
    • D07B7/16—Auxiliary apparatus
    • D07B7/18—Auxiliary apparatus for spreading or untwisting ropes or cables into constituent parts for treatment or splicing purposes
    • D07B7/185—Auxiliary apparatus for spreading or untwisting ropes or cables into constituent parts for treatment or splicing purposes for temporarily untwisting ropes or cables into constituent parts for applying a coating
    • 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
    • B05D2202/00—Metallic substrate
    • 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
    • B05D2256/00—Wires or fibres
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0606—Reinforcing cords for rubber or plastic articles
    • D07B1/0613—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the rope configuration
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2047—Cores
    • D07B2201/2052—Cores characterised by their structure
    • D07B2201/2053—Cores characterised by their structure being homogeneous
    • D07B2201/2054—Cores characterised by their structure being homogeneous comprising foam material
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2075—Fillers
    • D07B2201/2079—Fillers characterised by the kind or amount of filling
    • D07B2201/2081—Fillers characterised by the kind or amount of filling having maximum filling
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2501/00—Application field
    • D07B2501/20—Application field related to ropes or cables
    • D07B2501/2076—Power transmissions

Definitions

  • the invention relates to a method for coating a tension member, in particular for conveyor belts.
  • Conveyor belts have a load-bearing and a running-side cover plate, each made of a polymer material with elastic properties, as well as an embedded tension member in the form of ropes running parallel in the longitudinal direction of the conveyor belt, which can essentially be made of steel.
  • the carcass of a conveyor belt that transmits tractive force consists of textile and / or steel cord inserts, which are generally surrounded by at least one adhesive rubber mixture.
  • the carcasses are surrounded on all sides by wear-resistant rubber cover plates and rubber edge protection.
  • various puncture protection devices can be provided if required.
  • Steel cable conveyor belts in which the carcass consists essentially of steel cables are referred to as steel cable conveyor belts.
  • Steel cable conveyor belts enable excellent transport performance even under heavy loads. Their robust construction guarantees both a high breaking strength with the strongest conveying capacity, as well as good resistance to impacts. As a rule, they are particularly resistant to abrasion, rot and corrosion, chemically resistant and thermally stable, so that a long service life with low maintenance requirements is guaranteed.
  • the steel cables are usually arranged as a layer on one level between the cover plates.
  • the steel cables are often galvanized for reasons of adhesion and corrosion protection, mostly have a diameter of 2.8 to 16.0 mm and can consist of approx. 40 to 250 individual wires
  • adhesive mixtures also referred to as adhesive rubber mixtures
  • adhesive rubber mixtures are often used which, in addition to optimizing the adhesion as such, should also flow into the steel cables during the vulcanization process in order to enable better sealing.
  • the complete penetration of the entire rope which is also referred to as rubber coating, is essential for the service life of the steel rope and thus also for the entire conveyor belt. If there is no complete rubber coating, voids in the rope construction remain open, which means that liquids such as water, oils, etc. can migrate in the rope and progressive oxidation processes, especially corrosion, with increasing aging and early failure of the entire conveyor belt can occur , The larger the rope diameter, the harder it is to penetrate the entire rope construction.
  • the object of the invention is therefore to provide a method which ensures that the rope is completely rubberized, so that the number of open cavities is significantly reduced and thus prevents the transport or migration of liquids into the rope construction and especially within the rope construction can be.
  • the tension member is usually coated in an immersion bath.
  • the tension member was usually simply immersed in the immersion bath and pulled out again.
  • a coating was only formed on the tension member.
  • tension member construction is compressed for 0.2 sec to 5 min, preferably for 0.2 sec to 10 sec.
  • the compression of the tension member construction can take place in different ways, the compression taking place at least by generating a negative pressure.
  • a combination of the above, in particular of overpressure and underpressure, in a device suitable for this purpose is also possible and advantageous.
  • the use of negative pressure generally requires less coating mass, since the coating mass can either be in (half) shells or in a tube through which the rope is pulled.
  • the short-term compression of the rope construction can optionally be combined with a mechanical or a physical opening of the rope construction in order to optimize the full penetration.
  • the rope for the conveyor belt is usually made up of several strands, which in turn consist of individual wires.
  • the most common constructions are 7x7, with a rope made of 7 strands, each consisting of 7 wires, 1x19 + 7x7, with a core strand made of 19 single wires and outer strands made of 7 wires each, and 7x19, with a rope made of 7 strands, each Strand consists of 19 wires.
  • it is a steel cable or a steel hybrid cable, in which at least 20% by volume of the cable preferably consists of steel.
  • the tension member coated by the method according to the invention is preferably used for the production of conveyor belts or conveyor belts.
  • Conveyor belts are usually used for bulk goods (such as coal, ores, sand, cement, etc.), while conveyor belts are usually used for general cargo (packages, etc.). Conveyor belts are generally longer, wider, thicker and stronger than conveyor belts. In common usage, however, the two terms often mix.
  • the present invention is therefore suitable both for conveyor belts and for conveyor belts, in each of which ropes are used which are essentially made of steel.
  • the coating agent or coating material used is selected depending on the material of the tension member and its construction.
  • the coating composition is preferably based on at least one elastomer.
  • the elastomer can be rubber, but it can also be act thermoplastic elastomers such as polyurethane. However, it is preferably a rubber which is selected from the group consisting of natural rubber (NR) and / or butadiene rubber (BR) and / or chloroprene rubber (CR) and / or styrene-butadiene rubber (SBR) and / or nitrile rubber (NBR, HNBR) and / or butyl rubber (IIR) and / or ethylene-propylene rubber (EPM) and / or ethylene-propylene-diene rubber (EPDM) and / or polyacrylate rubber (ACM) and / or epichlorohydrin rubber (ECO) and / or chlorosulfonated polyethylene rubber (CSM) and / or silicone rubber (MVQ) and / or fluororubber (FPM).
  • NR natural rubber
  • the rubbers mentioned can be used alone or in a blend. Mixtures based on SBR and / or NR and / or BR are particularly suitable as coating compositions.
  • the coating composition usually also contains at least one plasticizer and / or at least one solvent, via which the viscosity and / or the adhesion or the stickiness of the coating composition can generally be adjusted.
  • the coating composition may additionally contain at least one blowing agent.
  • Both inorganic and organic compounds or microspheres can be used as blowing agents.
  • Inorganic or organic compounds that are used as blowing agents are usually so-called propellants, e.g. Azo and diazo compounds that split off gases (e.g. N2 or CO2) under the influence of heat or catalysts and thus enable pore formation.
  • propellants e.g. Azo and diazo compounds that split off gases (e.g. N2 or CO2) under the influence of heat or catalysts and thus enable pore formation.
  • the microspheres are hollow spheres (microspheres) with a diameter in the ⁇ m range made of glass, phenolic resin, carbon or thermoplastic material. The microspheres are available on the market in an expanded form but also in an expandable form.
  • expandable microspheres are preferably used, which are filled with a blowing agent and expand when heated.
  • Such microspheres are e.g. B. sold under the name Expancel® by Akzo Nobel.
  • the individual steel wires, the tension member construction are usually still provided with an adhesive.
  • adhesive are preferably zinc, brass, zinc compounds, brass compounds, isocyanates, epoxies or other known adhesive agents. These ensure better adhesion of the coating compound to the individual wire.
  • Fig. 1 shows a first variant of a method based on a schematic representation, which is excluded from the claimed scope of the present invention, but is still suitable for understanding the same.
  • the tension member 2 to be coated is passed through an immersion bath 1. At least two opposite points are compressed by at least two compression units, preferably compression rollers ("pinch rollers"), the tension member.
  • the tension member does not have to be bent here.
  • Fig. 2 shows a representation of the method according to the invention using a schematic representation.
  • the tension member 2 to be coated is continuously guided through a tube, of which only a lower half-shell is shown for reasons of clarity.
  • a vacuum 5 is generated using suitable devices.
  • the coating composition is pressed into the rope at another point by means of overpressure 6.
  • only a vacuum can also be generated.

Description

Die Erfindung betrifft ein Verfahren zur Beschichtung eines Zugträgers insbesondere für Fördergurte.The invention relates to a method for coating a tension member, in particular for conveyor belts.

Fördergurte besitzen eine tragseitige und eine laufseitige Deckplatte aus jeweils einem polymeren Werkstoff mit elastischen Eigenschaften sowie einen eingebetteten Zugträger in Form von in Fördergurtlängsrichtung parallel verlaufenden Seilen, welche im Wesentlichen aus Stahl aufgebaut sein können.Conveyor belts have a load-bearing and a running-side cover plate, each made of a polymer material with elastic properties, as well as an embedded tension member in the form of ropes running parallel in the longitudinal direction of the conveyor belt, which can essentially be made of steel.

Die zugkraftübertragende Karkasse eines Fördergurtes besteht aus Textil- und / oder Stahlseileinlagen, die in der Regel von wenigstens einer Haftgummimischung umgeben sind. Die Karkassen sind allseitig von verschleißfesten Gummideckplatten und einem Gummikantenschutz umgeben. Zusätzlich können bei Bedarf noch diverse Durchschlagsschutzeinrichtungen vorhanden sein.The carcass of a conveyor belt that transmits tractive force consists of textile and / or steel cord inserts, which are generally surrounded by at least one adhesive rubber mixture. The carcasses are surrounded on all sides by wear-resistant rubber cover plates and rubber edge protection. In addition, various puncture protection devices can be provided if required.

Fördergurte bei denen die Karkasse im Wesentlichen aus Stahlseilen besteht, werden als Stahlseilfördergurte bezeichnet. Stahlseilfördergurte ermöglichen hervorragende Transportleistungen auch bei harter Beanspruchung. Ihre robuste Konstruktion garantiert sowohl eine hohe Bruchkraft bei stärkster Förderleistung, als auch eine gute Beaufschlagungsfestigkeit. Sie sind in der Regel besonders abriebfest, verrottungs- und korrosionsbeständig, chemisch resistent und thermisch stabil, so dass eine lange Lebensdauer bei niedrigem Wartungsbedarf gewährleistet ist.Conveyor belts in which the carcass consists essentially of steel cables are referred to as steel cable conveyor belts. Steel cable conveyor belts enable excellent transport performance even under heavy loads. Their robust construction guarantees both a high breaking strength with the strongest conveying capacity, as well as good resistance to impacts. As a rule, they are particularly resistant to abrasion, rot and corrosion, chemically resistant and thermally stable, so that a long service life with low maintenance requirements is guaranteed.

Im Stahlseilfördergurt sind die Stahlseile meist als Lage in einer Ebene zwischen den Deckplatten angeordnet. Die Stahlseile sind aus Gründen der Haftung und des Korrosionsschutzes häufig verzinkt, besitzen zumeist einen Durchmesser von 2,8 bis 16,0 mm und können aus ca. 40 bis zu 250 Einzeldrähten bestehenIn the steel cable conveyor belt, the steel cables are usually arranged as a layer on one level between the cover plates. The steel cables are often galvanized for reasons of adhesion and corrosion protection, mostly have a diameter of 2.8 to 16.0 mm and can consist of approx. 40 to 250 individual wires

Zur Verbesserung der Haftung werden häufig zusätzlich noch Haftmischungen, auch als Haftgummimischungen bezeichnet, verwendet, die neben der Optimierung der Haftung als solche auch während des Vulkanisationsprozesses in die Stahlseile hineinfließen sollen um eine bessere Abdichtung zu ermöglichen. Das vollständige Durchdringen des gesamten Seils, die auch als Durchgummierung bezeichnet wird, ist essentiell für die Lebensdauer des Stahlseils und somit auch für den gesamten Fördergurt. Findet keine vollständige Durchgummierung statt, so verbleiben Hohlräume in der Seilkonstruktion offen, wodurch bspw. Flüssigkeiten wie Wasser, Öle, etc. im Seil wandern können und es zu fortschreitenden Oxidationsprozessen, insbesondere zu Korrosion, unter zunehmender Alterung und einem Frühausfall des gesamten Fördergurtes kommen kann. Die vollständige Durchdringung der gesamten Seilkonstruktion ist umso schwerer, je größer der Seildurchmesser ist. Bei geschlossenen Seilkonstruktionen, welche auch als parallelschlag- oder gleichschlag-Konstruktion bezeichnet werden, ist sie auch bei geringeren Durchmessern kaum zu erreichen. Bei offenen Seilkonstruktionen, welche auch als Kreuzschlagseilkonstruktion bezeichnet wird, existieren bei der Anbringung der Haftgummierung oft dynamische Probleme.In order to improve the adhesion, adhesive mixtures, also referred to as adhesive rubber mixtures, are often used which, in addition to optimizing the adhesion as such, should also flow into the steel cables during the vulcanization process in order to enable better sealing. The complete penetration of the entire rope, which is also referred to as rubber coating, is essential for the service life of the steel rope and thus also for the entire conveyor belt. If there is no complete rubber coating, voids in the rope construction remain open, which means that liquids such as water, oils, etc. can migrate in the rope and progressive oxidation processes, especially corrosion, with increasing aging and early failure of the entire conveyor belt can occur , The larger the rope diameter, the harder it is to penetrate the entire rope construction. In the case of closed rope constructions, which are also referred to as parallel lay or flat lay construction, it can hardly be achieved even with smaller diameters. In the case of open rope constructions, which are also referred to as cross lay rope constructions, there are often dynamic problems when attaching the adhesive rubber.

Zur Beschichtung, insbesondere von Stahlseilen, sind verschiedene Lösungsansätze bekannt. Zum einen lässt sich bspw. ein Überzug auf die Seile aufbringen, siehe u.a. DE 44 38 420 A1 , DE 690 29 389 T2 oder DE 79 36 995 U1 . Dies führt allerdings zu den bereits oben erwähnten Nachteilen. In DE 694 21 090 T2 wird beispielsweise die Herstellung einer offenen Stahlcordkonstruktion beschrieben, bei dem die Herstellung in einem aufwendigen Verfahren gezielt unter Bildung von zusätzlichen Mikrolücken erfolgt, in die bei einer späteren Gummierung die Gummierungsmasse eindringen kann Ein Verfahren zur Durchgummierung eines Seils unter Verwendung von Kompression ist aus der Patentanmeldung CN 102400402 A bekannt.Various solutions are known for coating, in particular steel cables. On the one hand, a covering can be applied to the ropes, see, among others DE 44 38 420 A1 . DE 690 29 389 T2 or DE 79 36 995 U1 , However, this leads to the disadvantages already mentioned above. In DE 694 21 090 T2 For example, the production of an open steel cord construction is described, in which the production takes place in a complex process in a targeted manner with the formation of additional micro-gaps, into which the rubber mass can penetrate during a later rubber coating CN 102400402 A known.

Die Aufgabe der Erfindung besteht daher darin, ein Verfahren bereitzustellen, welches eine vollständige Durchgummierung des Seils gewährleistet, so dass die Anzahl von offenen Hohlräumen deutlich reduziert wird und somit ein Transport bzw. eine Wanderung von Flüssigkeiten in die Seilkonstruktion und vor allem innerhalb der Seilkonstruktion verhindert werden kann.The object of the invention is therefore to provide a method which ensures that the rope is completely rubberized, so that the number of open cavities is significantly reduced and thus prevents the transport or migration of liquids into the rope construction and especially within the rope construction can be.

Gelöst wird diese Aufgabe dadurch, dass das Verfahren wenigstens die Verfahrensschritte gemäß Anspruch 1 enthält.This object is achieved in that the method contains at least the method steps according to claim 1.

Das Beschichten des Zugträgers erfolgt in der Regel in einem Tauchbad. Bisher wurde üblicherweise der Zugträger einfach in das Tauchbad eingetaucht und wieder herausgezogen. Dadurch wurde aber lediglich, wie bereits eingangs erwähnt, ein Überzug auf den Zugträger ausgebildet. Zur vollständigen Durchdringung der Zugträgerkonstruktion mit der Beschichtungsmasse wurde nun überaschenderweise herausgefunden, dass die Zugträgerkonstruktion während der Beschichtung im Tauchbad kurzfristig komprimiert werden kann, ohne dass hierbei die Seilkonstruktion als solches Nachteile erfährt. Dies bedeutet, dass die Kompression reversibel sein muss, damit das Seil in seine ursprüngliche Beschaffenheit, die nach den Anforderungen des Zugträgers ausgewählt wurde, zurückkehren kann.The tension member is usually coated in an immersion bath. Previously, the tension member was usually simply immersed in the immersion bath and pulled out again. As a result, however, as already mentioned at the beginning, a coating was only formed on the tension member. To completely penetrate the tension member construction with the coating mass, it has now surprisingly been found that the tension member construction can be compressed briefly during the coating in the immersion bath without the rope construction as such experiencing disadvantages. This means that the compression must be reversible so that the rope can return to its original condition, which was selected according to the requirements of the tension member.

Insbesondere bei geschlossenen Seilkonstruktionen war ein vollständiges Durchdringen bisher schwierig und bei bestimmten Seilkonstruktionen gar nicht möglich.A complete penetration was previously difficult, especially with closed rope constructions, and was not possible at all with certain rope constructions.

Kurzzeitige Kompression bedeutet in diesem Zusammenhang, dass die Zugträgerkonstruktion für 0,2 sec bis 5 min, bevorzugt für 0,2 sec bis 10 sec komprimiert wird.Brief compression in this context means that the tension member construction is compressed for 0.2 sec to 5 min, preferably for 0.2 sec to 10 sec.

Die Kompression der Zugträgerkonstruktion kann auf verschiedenen Wegen erfolgen, wobei die Kompression zumindest durch Erzeugen eines Unterdrucks erfolgt. So ist es beispielsweise möglich, eine Kompression der Seilkonstruktion zusätzlich mittels Quetschung oder Überdruck zu erzeugen. Eine Kombination der genannten, insbesondere von Überdruck und Unterdruck in einer dafür geeigneten Vorrichtung ist ebenso möglich und vorteilhaft.The compression of the tension member construction can take place in different ways, the compression taking place at least by generating a negative pressure. For example, it is possible to additionally compress the rope construction by means of crushing or excess pressure. A combination of the above, in particular of overpressure and underpressure, in a device suitable for this purpose is also possible and advantageous.

Nach der Kompression erfolgt eine natürliche Entspannung der Seilkonstruktion, währenddessen die Beschichtungsmasse in die Seilkonstruktion einfließen kann.After the compression, the rope construction relaxes naturally, during which the coating mass can flow into the rope construction.

Die Verwendung von Unterduck benötigt in der Regel weniger Beschichtungsmasse, da sich die Beschichtungsmasse auch entweder in (Halb-)Schalen oder in einer Röhre befinden kann, durch die das Seil gezogen wird.The use of negative pressure generally requires less coating mass, since the coating mass can either be in (half) shells or in a tube through which the rope is pulled.

Die kurzzeitige Kompression der Seilkonstruktion kann ggf. mit einem mechanischen oder einem physikalischen Öffnen der Seilkonstruktion kombiniert werden, um die vollständige Durchdringung zu optimieren.The short-term compression of the rope construction can optionally be combined with a mechanical or a physical opening of the rope construction in order to optimize the full penetration.

Das Seil für den Fördergurt ist in der Regel aus mehreren Litzen, welche wiederum aus einzelnen Drähten bestehen, aufgebaut. Die gängigsten Konstruktionen sind 7x7, mit einem Seil aus 7 Litzen, die je aus 7 Drähten bestehen, 1x19+7x7, mit einer Kernlitze aus 19 Einzeldrähten und äußeren Litzen aus je 7 Drähten, und 7x19, mit einem Seil aus 7 Litzen, wobei jede Litze aus 19 Drähten besteht.The rope for the conveyor belt is usually made up of several strands, which in turn consist of individual wires. The most common constructions are 7x7, with a rope made of 7 strands, each consisting of 7 wires, 1x19 + 7x7, with a core strand made of 19 single wires and outer strands made of 7 wires each, and 7x19, with a rope made of 7 strands, each Strand consists of 19 wires.

Erfindungsgemäß handelt es sich um ein Stahlseil oder um ein Stahl-Hybrid-Seil, bei dem bevorzugt wenigstens 20 Vol.-% des Seils aus Stahl bestehen.According to the invention, it is a steel cable or a steel hybrid cable, in which at least 20% by volume of the cable preferably consists of steel.

Der nach dem erfindungsgemäßen Verfahren beschichtete Zugträger wird bevorzugt für die Herstellung von Fördergurten oder Transportbändern verwendet. In der Literatur wird häufig zwischen Fördergurten und Transportbändern unterschieden. Fördergurte werden in der Regel für Schüttgut (wie bspw. Kohle, Erze, Sand, Zement usw.) eingesetzt, während Transportbänder üblicherweise für Stückgut (Pakete usw.) benutzt werden. Fördergurte sind im Allgemeinen länger, breiter, dicker und stärker als Transportbänder. Im allgemeinen Sprachgebrauch vermischen sich allerdings die beiden Begrifflichkeiten oft. Die vorliegende Erfindung ist somit sowohl für Fördergurte als auch für Transportbänder geeignet, bei denen jeweils Seile zum Einsatz gelangen, die im Wesentlichen aus Stahl aufgebaut sind.The tension member coated by the method according to the invention is preferably used for the production of conveyor belts or conveyor belts. In the literature, a distinction is often made between conveyor belts and conveyor belts. Conveyor belts are usually used for bulk goods (such as coal, ores, sand, cement, etc.), while conveyor belts are usually used for general cargo (packages, etc.). Conveyor belts are generally longer, wider, thicker and stronger than conveyor belts. In common usage, however, the two terms often mix. The present invention is therefore suitable both for conveyor belts and for conveyor belts, in each of which ropes are used which are essentially made of steel.

Das verwendete Beschichtungsmittel bzw. die verwendete Beschichtungsmasse wird in Abhängigkeit vom Material des Zugträgers und dessen Konstruktion ausgewählt.The coating agent or coating material used is selected depending on the material of the tension member and its construction.

Die Beschichtungsmasse ist bevorzugt auf der Basis wenigstens eines Elastomers aufgebaut. Bei dem Elastomer kann es sich um Kautschuke, aber auch um thermoplastische Elastomere, wie bspw. Polyurethan, handeln. Es handelt sich bevorzugt allerdings um einen Kautschuk, der ausgewählt ist aus der Gruppe, bestehend aus Naturkautschuk (NR) und / oder Butadien-Kautschuk (BR) und / oder ChloroprenKautschuk (CR) und / oder Styrol-Butadien-Kautschuk (SBR) und / oder Nitrilkautschuk (NBR, HNBR) und / oder Butylkautschuk (IIR) und / oder Ethylen-Propylen-Kautschuk (EPM) und / oder Ethylen-Propylen-Dien-Kautschuk (EPDM) und / oder Polyacrylat-Kautschuk (ACM) und / oder Epichlorhydrinkautschuk (ECO) und / oder Chlorsulfonierter Polyethylenkautschuk (CSM) und / oder Silikonkautschuk (MVQ) und / oder Fluorkautschuk (FPM). Die genannten Kautschuke können hierbei alleine oder im Verschnitt eingesetzt werden. Besonders gut geeignet sind als Beschichtungsmassen Mischungen auf der Basis von SBR und / oder NR und / oder BR. Die Beschichtungsmasse enthält zumeist noch wenigstens einen Weichmacher und / oder wenigstens ein Lösungsmittel, über die in der Regel die Viskosität und / oder die Haftung bzw. die Klebrigkeit der Beschichtungsmasse eingestellt werden kann.The coating composition is preferably based on at least one elastomer. The elastomer can be rubber, but it can also be act thermoplastic elastomers such as polyurethane. However, it is preferably a rubber which is selected from the group consisting of natural rubber (NR) and / or butadiene rubber (BR) and / or chloroprene rubber (CR) and / or styrene-butadiene rubber (SBR) and / or nitrile rubber (NBR, HNBR) and / or butyl rubber (IIR) and / or ethylene-propylene rubber (EPM) and / or ethylene-propylene-diene rubber (EPDM) and / or polyacrylate rubber (ACM) and / or epichlorohydrin rubber (ECO) and / or chlorosulfonated polyethylene rubber (CSM) and / or silicone rubber (MVQ) and / or fluororubber (FPM). The rubbers mentioned can be used alone or in a blend. Mixtures based on SBR and / or NR and / or BR are particularly suitable as coating compositions. The coating composition usually also contains at least one plasticizer and / or at least one solvent, via which the viscosity and / or the adhesion or the stickiness of the coating composition can generally be adjusted.

Des Weiteren kann die Beschichtungsmasse zusätzlich noch wenigstens ein Blähmittel enthalten.Furthermore, the coating composition may additionally contain at least one blowing agent.

Als Blähmittel können sowohl anorganische sowie organische Verbindungen oder auch Mikrokugeln eingesetzt werden. Anorganische oder organische Verbindungen, die als Blähmittel verwendet werden, sind in der Regel so genannte Treibgase, wie z.B. Azo- und Diazo-Verbindungen, die unter dem Einfluss von Wärme oder Katalysatoren Gase (z.B. N2 oder CO2) abspalten und somit eine Porenbildung ermöglichen. Bei den Mikrokugeln handelt es sich um hohle Kugeln (Mikrosphären) mit einem Durchmesser im µm-Bereich aus Glas, Phenolharz, Kohlenstoff oder thermoplastischem Kunststoffmaterial. Die Mikrokugeln sind in bereits expandierter Form aber auch in expandierbarer Form auf dem Markt erhältlich. Um eine Volumenzunahme der Beschichtung erzielen zu können, welche zu einer Optimierung der Durchgummierung des Seils führt, werden bevorzugt expandierbare Mikrokugeln verwendet, die mit einem Treibmittel gefüllt sind und sich beim Erwärmen ausdehnen. Derartige Mikrokugeln werden z. B. unter dem Namen Expancel® von der Firma Akzo Nobel vertrieben.Both inorganic and organic compounds or microspheres can be used as blowing agents. Inorganic or organic compounds that are used as blowing agents are usually so-called propellants, e.g. Azo and diazo compounds that split off gases (e.g. N2 or CO2) under the influence of heat or catalysts and thus enable pore formation. The microspheres are hollow spheres (microspheres) with a diameter in the µm range made of glass, phenolic resin, carbon or thermoplastic material. The microspheres are available on the market in an expanded form but also in an expandable form. In order to be able to achieve an increase in volume of the coating, which leads to an optimization of the rubberization of the rope, expandable microspheres are preferably used, which are filled with a blowing agent and expand when heated. Such microspheres are e.g. B. sold under the name Expancel® by Akzo Nobel.

Eine Kombination von expandierten und expandierbaren Mikrokugeln ist möglich.A combination of expanded and expandable microspheres is possible.

Die einzelnen Stahldrähte, der Zugträgerkonstruktion, sind in der Regel noch mit einem Adhäsionsmittel versehen. Hierbei handelt es sich bevorzugt um Zink, Messing, Zinkverbindungen, Messingverbindungen, Isocyanate, Epoxide oder weitere bekannte Adhäsionsmittel. Diese gewährleiten eine bessere Haftung der Beschichtungsmasse an dem einzelnen Draht.The individual steel wires, the tension member construction, are usually still provided with an adhesive. These are preferably zinc, brass, zinc compounds, brass compounds, isocyanates, epoxies or other known adhesive agents. These ensure better adhesion of the coating compound to the individual wire.

Anhand von zwei Figuren soll die Erfindung näher erläutert werden, ohne dabei auf diese beschränkt zu sein.The invention is to be explained in more detail with reference to two figures, without being limited to these.

Fig. 1 zeigt eine erste Variante eines Verfahrens anhand einer schematischen Darstellung, welches vom beanspruchten Schutzbereichs der vorliegenden Erfindung ausgeschlossen ist, dennoch zum Verständnis derselben geeignet ist. Der zu beschichtende Zugträger 2 wird durch ein Tauchbad 1 geführt. An wenigstens zwei sich gegenüberliegenden Stellen wird durch wenigsten zwei Kompressionseinheiten, bevorzugt Kompressionsrollen ("Quetschrollen"), der Zugträger komprimiert. Hierbei muss der Zugträger nicht gebogen werden. Fig. 1 shows a first variant of a method based on a schematic representation, which is excluded from the claimed scope of the present invention, but is still suitable for understanding the same. The tension member 2 to be coated is passed through an immersion bath 1. At least two opposite points are compressed by at least two compression units, preferably compression rollers ("pinch rollers"), the tension member. The tension member does not have to be bent here.

Fig. 2 zeigt eine Darstellung des erfindungsgemäßen Verfahrens anhand einer schematischen Darstellung. Der zu beschichtende Zugträger 2 wird kontinuierlich durch eine Röhre geführt, von der aus Übersichtsgründen lediglich eine untere Halbschale abgebildet ist. Anhand geeigneter Einrichtungen wird ein Unterdruck 5 erzeugt. Zusätzlich wird mittels Überdruck 6 die Beschichtungsmasse in das Seil an einer anderen Stelle hineingepresst. Es kann optional auch nur ein Unterdruck erzeugt werden. Fig. 2 shows a representation of the method according to the invention using a schematic representation. The tension member 2 to be coated is continuously guided through a tube, of which only a lower half-shell is shown for reasons of clarity. A vacuum 5 is generated using suitable devices. In addition, the coating composition is pressed into the rope at another point by means of overpressure 6. Optionally, only a vacuum can also be generated.

Bezugszeichenliste (Teil der Beschreibung)Reference list (part of the description)

11
Tauchbaddip
22
Zugträger in SeilkonstruktionTension member in rope construction
3, 3'3, 3 '
Kompressionsrollencompression rollers
44
untere Halbschale einer Röhrelower half-shell of a tube
55
Unterdruckvacuum
66
Überdruckoverprint

Claims (5)

  1. Method for coating, specifically completely rubberizing, a tension member (2), comprising at least the following method steps:
    - briefly compressing the tension member in a reversible manner during the coating procedure, said tension member being configured in a cable construction (2), wherein the brief reversible compressing is performed by generating a negative pressure (5), and wherein the brief reversible compressing is performed within 2 seconds to 5 minutes, and wherein the cable (2) is a steel cable or a steel hybrid cable; and thereafter
    - infiltrating the coating compound into the opened cable construction (2), wherein the cable (2) is completely penetrated.
  2. Method according to Claim 1, characterized in that the compressing is additionally performed by compression rollers (3, 3').
  3. Method according to Claim 1 or 2, characterized in that the tension member (2) prior to the compressing is guided into an immersion bath (1).
  4. Method according to one of Claims 1 to 3, characterized in that the compressing is additionally performed by generating a positive pressure (6).
  5. Method according to one of Claims 1 to 4, characterized in that the cable (2) has a compact construction.
EP15723886.6A 2014-06-23 2015-05-12 Method for coating a tension member, and use thereof Active EP3158126B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014211931.6A DE102014211931A1 (en) 2014-06-23 2014-06-23 Process for coating a tension member, in particular for conveyor belts
PCT/EP2015/060398 WO2015197256A1 (en) 2014-06-23 2015-05-12 Method for coating a tension member, and use thereof

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Publication Number Publication Date
EP3158126A1 EP3158126A1 (en) 2017-04-26
EP3158126B1 true EP3158126B1 (en) 2020-01-15

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Country Link
EP (1) EP3158126B1 (en)
DE (1) DE102014211931A1 (en)
WO (1) WO2015197256A1 (en)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3923003A (en) * 1974-05-06 1975-12-02 Southwire Co Production of flooded multistrand cable
LU79218A1 (en) 1978-03-13 1979-10-29 Bekaert Sa Nv REINFORCING METAL CORDAGE AND ITS MANUFACTURING METHOD
US4344278A (en) * 1980-05-30 1982-08-17 Projected Lubricants, Inc. Lubricated wire rope
DE3304789A1 (en) * 1983-02-11 1984-08-23 Vsesojuznyj naučno-issledovatel'skij, proektno-konstruktorskij i technologičeskij institut kabelnoj promyšlennosti, Moskva Twisted strand and device for the coating of wires of the twisted strand
EP0470280B1 (en) 1990-08-07 1996-12-11 Tokyo Rope Manufacturing Co., Ltd. Method for manufacturing polymeric coated steel wires for rubber reinforcement
CA2109904C (en) * 1992-12-18 2004-09-14 Pol Bruyneel Multi-strand steel cord
ES2139878T3 (en) 1993-12-15 2000-02-16 Bekaert Sa Nv OPEN STRUCTURE FOR STEEL CORDS.
DE4438420A1 (en) 1994-10-27 1996-05-02 Thomcast Gmbh Sendeanlagen Fue Fixture for coating steel cable esp. with anticorrosive mixture
DE29816936U1 (en) * 1998-09-22 1998-12-24 Rosenberger Tauwerk Gmbh Impregnated rope
CN102400402A (en) * 2010-09-08 2012-04-04 盐城神力制绳有限公司 Impregnation process for twisted fiber cable
US9677221B2 (en) * 2012-03-01 2017-06-13 Dsm Ip Assets B.V. Method and device for impregnating a rope with a liquid material

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Publication number Publication date
DE102014211931A1 (en) 2015-12-24
EP3158126A1 (en) 2017-04-26
WO2015197256A1 (en) 2015-12-30

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