DE102009044828A1 - Use of a one-component adhesive for cold adhesion of the components of a conveyor system - Google Patents

Abstract

Use of a one-component adhesive for cold adhesion of the components of a conveyor system, is claimed.

Description

Conveyors for the transport of different types of material, such as ore, overburden and rock, extend up to several kilometers, both in the lowlands as well as in mountains and in the context of surface and underground mining.

An essential component of such a conveyor system is the elastic conveyor belt with a support side and running side cover plate. The cover plate material usually consists of a vulcanized rubber mixture, in particular on the following basis:
Natural rubber (NR)
Butadiene rubber (BR)
Chloroprene rubber (CR)
Styrene butadiene rubber (SBR)
Nitrile rubber (NBR)
NR / BR blend
SBR / BR blend

Of particular importance to date is CR, which is characterized by high resistance to fire, weathering and aging, in particular for conveyor belts used in underground mining.

Conveyor belts are usually equipped with an embedded reinforcement or tensile carrier, wherein textile conveyor belts and in particular steel cord conveyor belts are to be mentioned. In particular, in Stahlseilfördergurten Syntheseordordquerarmierungen be introduced into the support side and / or running side cover plate for the purpose of slot protection.

The conveyor belt may be in a troughed form or as a tubular conveyor belt, with the closed design becoming increasingly important.

Further components of a conveyor system are:
driving drum
reversing drum
idlers
guide rollers
Correction rollers, in particular in tubular conveyor belt systems
chutes
shoring

In the context of monitoring conveyor systems are also transponder and / or conductor loops and / or barcodes that are embedded within the support side and / or running side cover plate of the conveyor belt and opto-electronic systems that monitor the support side and / or running surface of the conveyor belt to Insert, connected to a fully electronic evaluation device.

With regard to the prior art of such conveyor systems, reference is made in particular to the following patent documents:
DE 36 06 129 A1
DE 36 12 765 A1
DE 43 33 839 B4
EP 0 336 385 B1
EP 1 053 447 B1
EP 1 187 781 B1
EP 1 222 126 B1
WO 2005/023688 A1
WO 2008/034483 A1
US Pat. No. 7,178,663 B2

In addition to the predominantly mechanical assembly of components of a conveyor and high performance adhesives are used, especially in the context of cold bonding. Of particular importance is the bonding of polymeric components with each other or the bonding in the context of a polymer / metal composite.

So far, two-component adhesives (2K adhesives) have been used. In this cold glue system, the first component is an adhesive, for example based on CR. The second component is an amplifier solution or an activator, for example Desmodur (Bayer). Before bonding, the amplifier solution or the activator must be stirred into the adhesive. However, the adhesive that is now activated can only be processed for a limited time and is also activation-dependent on the ambient temperature. The residual material is finally completely thickened and must be added to the waste.

• – Mischen der Komponenten, verbunden mit der Gefahr von Mischfehlern;
• – Überschreiten der Topfzeit, dadurch Abfall durch nicht mehr verwendbare Reste;
• – Hohe Temperatur- und Luftfeuchtigkeitsempfindlichkeit;
• – Doppelte Lagerhaltung;
• – Beschränkte Verarbeitbarkeit;
• – Hohe Kosten.

The disadvantages of this two-component adhesive are in particular:

• - mixing of components, with the risk of mixing errors;
• - Exceeding the pot life, thereby waste by no longer usable radicals;
• - high temperature and humidity sensitivity;
• - double storage;
• - limited processibility;
• - High costs.

The object of the invention is therefore to provide an adhesive which avoids the disadvantages mentioned above.

This problem is solved by the use of a one-component adhesive.

• – Ein Aufbauteil, beispielsweise ein Mitnehmerteil, Führungsteil, Rand- und Seitenwandprofile, das aus einem polymeren Werkstoff (Elastomer, Thermoplastisches Elastomer, Thermoplast) besteht, wird fußseitig mit der tragseitigen Oberfläche des elastischen Fördergurtes verklebt. Derartige Aufbauteile werden insbesondere in der folgenden Patentliteratur beschrieben: DE 32 19 170 A1 DE 34 14 285 A1 DE 10 2009 025 906 A1 DE 10 2009 025 911 A1
• – Eine drehbare Trommel aus Metall (z. B. Stahl), insbesondere eine Antriebstrommel oder Umkehrtrommel, die mit der laufseitigen Oberfläche des elastischen Fördergurtes korrespondiert, wird mit einer Oberflächenbeschichtung aus einem polymeren Werkstoff (Elastomer, Thermoplastisches Elastomer, Thermoplast) versehen, wobei die Oberflächenbeschichtung mit der Oberfläche der Trommel verklebt ist.
• – Eine drehbare Rolle aus Metall (z. B. Stahl), insbesondere eine Tragrolle, Umlenkrolle oder Korrekturrolle, die ebenfalls mit der laufseitigen Oberfläche des elastischen Fördergurtes korrespondiert, wird mit einer Oberflächenbeschichtung aus einem polymeren Werkstoff (Elastomer, Thermoplastisches Elastomer, Thermoplast) versehen, wobei die Oberflächenbeschichtung mit der Oberfläche der Rolle verklebt ist.
• – Eine Schurre aus Metall (z. B. Stahl, Blech), die sich im Fördermaterialaufgabebereich einer Förderanlage befindet, wird zumindest zur Fördermaterialseite hin mit einer Oberflächenbeschichtung aus einem polymeren Werkstoff (Elastomer, Thermoplastisches Elastomer, Thermoplast) versehen, wobei die Oberflächenbeschichtung mit der Oberfläche der Schurre verklebt ist.

For conveyor systems, this one-component adhesive (1K adhesive) is used in particular for the following components:

• - A body part, such as a driver part, guide member, edge and side wall profiles, which consists of a polymeric material (elastomer, thermoplastic elastomer, thermoplastic) is glued to the foot side with the supporting surface of the elastic conveyor belt. Such build-up parts are described in particular in the following patent literature: DE 32 19 170 A1 DE 34 14 285 A1 DE 10 2009 025 906 A1 DE 10 2009 025 911 A1
• - A rotatable drum made of metal (eg steel), in particular a drive drum or reversing drum, which corresponds to the running side surface of the elastic conveyor belt is provided with a surface coating of a polymeric material (elastomer, thermoplastic elastomer, thermoplastic), wherein the Surface coating is bonded to the surface of the drum.
• - A rotatable roller made of metal (eg steel), in particular a support roller, pulley or correction roller, which also corresponds to the running side surface of the elastic conveyor belt is provided with a surface coating of a polymeric material (elastomer, thermoplastic elastomer, thermoplastic) , wherein the surface coating is glued to the surface of the roll.
• - A chute made of metal (eg steel, sheet metal), which is located in the Fördermaterialaufgabebereich a conveyor system is provided at least on the conveying material side with a surface coating of a polymeric material (elastomer, thermoplastic elastomer, thermoplastic), wherein the surface coating with the Surface of the chute is glued.

The surface coating of the drum, roller and chute serves for wear protection.

The one-component adhesive is a suspension (dispersion) before application, using as solvent (dispersant), for example, gasoline, methyl ethyl ketone, acetone or ethyl acetate or a mixture thereof. The proportion of the solvent is preferably 65 to 80 wt .-%.

• – CR mit einem bevorzugten Mengenbereich von 10 bis 20 Gew.-%;
• – ein Klebeharz, beispielsweise ein Alkylphenolharz, mit einem bevorzugten Mengenbereich von 10 bis 15 Gew.-%;
• – ein Metalloxid, beispielsweise MgO und/oder ZnO, mit einem bevorzugten Mengenbereich von 0,5 bis 3 Gew.-%;
• – einen Vulkanisationsbeschleuniger, beispielsweise Thirurame, Thiazole, Dithiocarbamate oder Xanthogenate, mit einem bevorzugten Mengenbereich von 0,5 bis 2 Gew.-%.

The suspension contains in particular the following constituents:

• CR with a preferred amount range of 10 to 20% by weight;
• An adhesive resin, for example an alkylphenol resin, with a preferred range of from 10 to 15% by weight;
• A metal oxide, for example MgO and / or ZnO, with a preferred amount range of from 0.5 to 3% by weight;
• A vulcanization accelerator, for example thirurams, thiazoles, dithiocarbamates or xanthates, with a preferred amount range of from 0.5 to 2% by weight.

The following table gives a recipe example in this context. ingredients Quantities in% by weight solvent 74.4 CR 12.0 alkylphenol 11.0 MgO and ZnO 1.5 vulcanization accelerators 1.1

After applying the one-component adhesive to the corresponding adhesive surfaces, the solvent evaporates with a simultaneously increasing adhesion with long-term effect.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 3606129 A1 [0008]
• DE 3612765 A1 [0008]
• DE 4333839 B3 [0008]
• EP 0336385 B1 [0008]
• EP 1053447 B1 [0008]
• EP 1187781 B1 [0008]
• EP 1222126 B1 [0008]
• WO 2005/023688 A1 [0008]
• WO 2008/034483 A1 [0008]
• US 7178663 B2 [0008]
• DE 3219170 A1 [0014]
• DE 3414285 A1 [0014]
• DE 102009025906 A1 [0014]
• DE 102009025911 A1 [0014]

Claims (15)

Use of a one-component adhesive for cold bonding of components of a conveyor system. Use according to claim 1, wherein a body part made of a polymeric material is glued to the foot-side surface of an elastic conveyor belt on the foot side. Use according to claim 1, wherein a rotatable drum made of metal, which corresponds to the running-side surface of an elastic conveyor belt, is provided with a surface coating of a polymeric material, the surface coating being glued to the surface of the drum. Use according to claim 1, wherein a rotatable roll of metal corresponding to the running-side surface of an elastic conveyor belt is provided with a surface coating of a polymeric material, the surface coating being glued to the surface of the roll. Use according to claim 1, wherein a chute made of metal, which is located in the conveying material application area of a conveyor system, at least to the conveying material side is provided with a surface coating of a polymeric material, wherein the surface coating is bonded to the surface of the chute. Use according to any one of claims 1 to 5, wherein the one-component adhesive is a suspension. Use according to claim 6, wherein the solvent of the suspension has a content of 65 to 80% by weight. Use according to claim 6 or 7, wherein the suspension contains chloroprene rubber. Use according to claim 8, wherein the content of chloroprene rubber is 10 to 20% by weight. Use according to any one of claims 6 to 9, wherein the suspension contains an adhesive resin. Use according to claim 10, wherein the proportion of adhesive resin is 10 to 15 wt .-%. Use according to any one of claims 6 to 11, wherein the suspension contains a metal oxide. Use according to claim 12, wherein the proportion of metal oxide is 0.5 to 3 wt .-%. Use according to any one of claims 6 to 13, wherein the suspension contains a vulcanization accelerator. Use according to claim 14, wherein the proportion of the vulcanization accelerator is 0.5 to 2% by weight.