WO2024120725A1 - Courroies en élastomère thermoplastique à angle raide et courroies fabriquées à partir d'une combinaison d'un caoutchouc et d'élastomères thermoplastiques avec un abrasif thermoplastique et des crampons en chevron résistant aux chocs pour des applications industrielles minières et lourdes - Google Patents

Courroies en élastomère thermoplastique à angle raide et courroies fabriquées à partir d'une combinaison d'un caoutchouc et d'élastomères thermoplastiques avec un abrasif thermoplastique et des crampons en chevron résistant aux chocs pour des applications industrielles minières et lourdes Download PDF

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Publication number
WO2024120725A1
WO2024120725A1 PCT/EP2023/081065 EP2023081065W WO2024120725A1 WO 2024120725 A1 WO2024120725 A1 WO 2024120725A1 EP 2023081065 W EP2023081065 W EP 2023081065W WO 2024120725 A1 WO2024120725 A1 WO 2024120725A1
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WO
WIPO (PCT)
Prior art keywords
conveyor belt
belt
top cover
chevron
thermoplastic
Prior art date
Application number
PCT/EP2023/081065
Other languages
English (en)
Inventor
Sebastian Seibold
Andrey MINKIN
Christel Bäuerle-Müller
Stavros Podias
Frank Kantorek
Mohamad Bachir
Donald Brown
Original Assignee
Contitech Transportbandsysteme Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Contitech Transportbandsysteme Gmbh filed Critical Contitech Transportbandsysteme Gmbh
Publication of WO2024120725A1 publication Critical patent/WO2024120725A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B65G15/30—Belts or like endless load-carriers
    • B65G15/32—Belts or like endless load-carriers made of rubber or plastics
    • B65G15/42—Belts or like endless load-carriers made of rubber or plastics having ribs, ridges, or other surface projections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D29/00—Producing belts or bands
    • B29D29/06—Conveyor belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B65G15/30—Belts or like endless load-carriers
    • B65G15/32—Belts or like endless load-carriers made of rubber or plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B65G15/30—Belts or like endless load-carriers
    • B65G15/32—Belts or like endless load-carriers made of rubber or plastics
    • B65G15/34—Belts or like endless load-carriers made of rubber or plastics with reinforcing layers, e.g. of fabric

Definitions

  • the present invention concerns conveyor belts having a top cover on the carrying side and a bottom cover on the pulley side, where the top cover on the carrying side has a chevron profiling and where the top cover on the carrying side and the chevron profiling is formed from a thermoplastic elastomer or a combination, where a lower part of the top cover consist of a rubber layer and the upper layer with chevron profiling are made of thermoplastic elastomer.
  • the bottom cover can be made of a rubber or a thermoplastic elastomer or a combination of it depending on an application case and costs.
  • the present invention further concerns methods for the production of corresponding conveyor belts, the use of respective conveyor belts for conveying particulate material, wherein the conveyor belt is used at least partially at an angle of inclination of more than 20° and where the particulate material is preferably material in hard rock mining or heavy industrial applications, and conveyor belt systems which comprise respective conveyor belts.
  • Conveyor belts are a conventional means to transport large amounts of material over greater distances, such as e.g. coal, clay or ores from the site of mining to a site, where the material is further processed or packaged for transport.
  • the conveyor belt may have to cover ascends, where the material is brought to a higher level.
  • Conventional rubber belts have a favorable friction to conveyed material, so that the belt can transport the material over inclination angles of up to 15° and in some cases even up to 20° without additional surface adaptation of the belt.
  • Typical surface structures for this purpose are chevron cleats or similar pattering or textures.
  • the patterning thereon is especially vulnerable to mechanical wear, like a cut, rip, tear or abrasion, as material, which is poured onto the belts, inflicts its kinetic energy predominantly on parts of the belts, which stick out from the surface. Therefore, it has to be ensured that the attachment of surface patterning is sufficiently solid to withstand such mechanical wear.
  • the rubber materials which are employed for the production of rubber conveyor belts are vulcanized to provide the belt with the required toughness and resilience.
  • surface structures such as chevron cleats
  • rubber materials are notorious as “difficult to bond substrates.”
  • one method to prepare profiled rubber conveyor belts is via the use of profiled heating plates during the vulcanization, by means of which profiles with a height of up to about 15 mm can be prepared.
  • profiled heating plates during the vulcanization
  • a yet further problem of conventional rubber conveyor belts is that to provide the required impact resilience and abrasion resistance properties, the rubber has to be provided in a significant thickness, which leads to relatively heavy belts.
  • a yet further problem of such rubber conveyor belts is the vulcanization, which is necessary to provide the required mechanical strength of the belt.
  • vulcanization is essentially (irrversible) crosslinking, the material cannot be “recycled” in the regular sense, but can only be “downcycled” to products with lower quality demands or “thermally utilized”.
  • recyclability is these days becoming more and more important, the necessity to vulcanize rubber in rubber conveyor belts is a big disadvantage.
  • CN 103910164 A discloses a wear-resisting PVG herringbone conveying belt which is prepared from an inner belt carcass structure of and PVG top and bottom covers, which are applied onto the belt carcass, and where the top cover comprises a herringbone patterning.
  • the respective belt had a top cover thickness of 3 to 6 mm and a depth of the patterning of about 3 to 4 mm.
  • conveyor belts for the transport of bulk materials such as e.g. ore or coal, where a profiled surface can be created without difficulty and where even the fabrication of cleats with a height of more than 15 mm is possible with minimal production time and labor.
  • the respective desired belts should in addition be lightweight, in that the required mechanical properties can be provided with less material compared to conventional rubber belts, and should be easy to clean.
  • the material to provide the structured top cover of the conveyor belt should also be processable in terms of a true recycling, where the material can be used to prepare new conveyor belts.
  • thermoplastic elastomers can be processed by casting or injection molding, which significantly simplifies the production process.
  • the surfaces formed from thermoplastic elastomers provide the benefit of being easier to clean, and, due to the “thermoplastic” nature of the elastomer, the material can be remolten at the end of the lifetime of the belts and reprocessed.
  • the present invention pertains to a conveyor belt 1 , with a top cover 12 on the carrying side and a bottom cover 13 on the pulley side, wherein the covers 12, 13 comprise an elastomeric material and the conveyor belt further comprises a belt core 11a having one or more embedded reinforcement members 11 , wherein the conveyor belt 1 on its top cover 12 has a profiling 15-19, which is formed substantially perpendicular Z to the carrying-side top cover 12, wherein the profiling 15-19 is a chevron profiling that has diagonal elements 15 that extend both in the longitudinal direction X and in transverse direction Y of the conveyor belt 1 and which together form a V-shape in pairs, characterized in that the top cover 12 on the carrying side and the chevron profiling is formed from a thermoplastic elastomer.
  • the tip 16 of the V shape can be formed from diagonal elements 15, which a touching each other or where there is only a small gap between diagonal elements 15 or can be formed by an additional element, which is aligned in the longitudinal direction X counter to the conveying direction Q.
  • thermoplastic elastomer formed from a thermoplastic elastomer is intended to cover the case where the full top cover 12 and the chevron profiling is formed from a thermoplastic elastomer as well as the case, where a part of the top cover 12 on the carrying side and the chevron profiling is formed from a thermoplastic elastomer.
  • the inventive conveyor belt has a middle belt core, which is composed of a belt core material and one or more embedded reinforcement members, and has a cover on both sides thereon, wherein one of the covers has a patterning and in operation is used as the carrying side of the conveyor belt.
  • the reinforcement member is a fabric, which can provide enforcement in both the running direction of the conveyor belt and the width direction of the belt.
  • the reinforcement members can be one dimensional strands or cords, which in the belt are arranged parallel in the running direction of the belt, or can be multiple fabrics, which in the belt are arranged stacked onto one another.
  • the core body material is usually present between respective fabric plies.
  • the more than one reinforcement members can be provided by a combination of one or more fabrics and one or more stands or cords.
  • the reinforcement member or reinforcement members are embedded into the belt core, which means that at least some of the material of the belt core penetrates into the pores or hollow spaces in the reinforcement members or between different reinforcement members. If the inventive belt has two (or more) reinforcement members, which are stacked over one another in the belt core, it is possible that the belt core material penetrates the fabric only from one side, and that on the other side there is partial penetration only of the material of the covers.
  • the reinforcement members can be constituted from any suitable material, which includes steel cables, fabrics or polyamide, aramide, polyethylene (e.g. UHMW- polyethylene) cords, ropes or fabrics.
  • the fabrics can be made of polyester, polyamide, cotton or combinations thereof.
  • woven conveyor belts can have woven carcasses that have polyester threads in the warp direction (longitudinal direction) and polyamide threads in the weft direction (transverse direction) (EP fabric).
  • Polyester threads can also be used in both directions (EE fabric) or polyamide threads can be used in both directions (PP fabric).
  • polyester, polyamide and cotton threads can be used in the warp direction and polyamide and cotton threads in the weft direction (EP-B-PB fabric). Because PP fabric stretches a lot in comparative processing and results in EE fabric, EP fabric represents a compromise solution and is the most commonly used reinforcement member in textile belts.
  • the conveyor belts can have woven carcasses as reinforcement members that have polyethylene or UHMWE- polyethylene threads in the warp direction and polypropylene threads in the weft direction.
  • Respective reinforcement members are easy to recycle with covers made from a thermoplastic elastomer.
  • the inventive conveyor belts are particularly advantageous for profiling, which has a height of at least 10 mm and in particular at least 15 mm, as belts with such profiling cannot easily be prepared with conventional rubbers. Accordingly, it is preferred that the inventive conveyor belt has a height of the chevron profiling of at least 15 mm, and more preferably in the range of 20 to 50 mm.
  • the shape of the profiling is not subject to any relevant restrictions, as long as the profiling is such that the sliding of material, which is transported on the conveyor belt, is hindered when the belt is at a higher inclination angle.
  • Exemplary, but not limiting examples of the shape of the profiling are provided in the pendant figures 3 to 6.
  • the core of the invention is the use of a thermoplastic elastomer as the base material for the top cover or part of it of the carrying side of the belt, which has the chevron profiling. While the specific type of the thermoplastic elastomer is not of particular importance, it has been found that thermoplastic polyurethanes (TPU) and thermoplastic vulcanisates (TPV) (i.e. elastic material, which have crosslinks between individual polymer molecules, but which still can be formed at elevated temperatures), due to their mechanical properties, are particularly suited for the preparation of the top cover. Accordingly, it is preferred if the thermoplastic elastomer in the inventive conveyor belt comprises and preferably is selected from a thermoplastic polyurethane and a thermoplastic vulcanisate.
  • TPU thermoplastic polyurethanes
  • TPV thermoplastic vulcanisates
  • thermoplastic polyurethanes are those which are based on a polyether polyol, preferably polytetramethylene glycol, or a polyester polyol as the polyol component.
  • Particularly advantageous polyester polyols are for example adipate-based polyester polyols, in particular in the form of polybutylene adipate, or polycaprolactone-based polyester polyol.
  • the polyols are reacted with a polyisocyanate or a mixture of polyisocyanates, wherein the polyisocyanate preferably comprises and in one embodiment consists of aromatic polyisocyanates.
  • the thermoplastic polyurethane may also comprise segments resulting from the incorporation of monomeric polyols, in particular a,o-diols such as 1 ,4-butane diol.
  • thermoplastic elastomer which is used in the inventive conveyor belt, is a thermoplastic vulcanisate
  • the vulcanisate is formed form ethylene-propylene-diene rubber (EPDM) and polypropylene by dynamical vulcanisation of the respective mixture thereof.
  • EPDM ethylene-propylene-diene rubber
  • the ratio of EPDM and polypropylene is preferably in the range of 60:40 to 40:60 and more preferably about 50:50.
  • the top cover on the carrying side will in most cases comprise at least one reinforcing filler.
  • reinforcing fillers carbon black, silica, or lignin with carbon black are preferred.
  • the filler is normally present at a level which is within the range of 20 phr to 80 phr and is more typically present at a level which is within the range of 30 phr to 75 phr. Even more preferably, the filler is present in the top cover 12 at a level which is within the range of 40 phr to 70 phr.
  • the belt can have one or more further transverse reinforcement elements, also known as breakers, such as e.g. fabric breakers or breakers applied in tires steel cord reinforcements comprising thin steel cables, which are closely arranged to one another.
  • breakers also known as breakers, such as e.g. fabric breakers or breakers applied in tires steel cord reinforcements comprising thin steel cables, which are closely arranged to one another.
  • the chevron profiling in most cases covers at least 50 % and preferably from 70% to 95% of the width of the belt. At the edges of the belt in the width direction, there is usually a small gap which is not covered by the profiling, because this facilitates dust isolation in the contact area between a belt and a material feeding- or transfer chute. Furthermore, most of the material to be transported will be around the center and the lack of profile at the edges has no impact on the functionality of the belt.
  • the chevron profiling and the top cover are formed as one piece, i.e. that the chevron profiling is formed as part of the top cover 12.
  • Such one piece can e.g. be easily be produced by extrusion of a thermoplastic elastomer layer on a belt core, followed by imprinting the desired profiling thereon, or could be formed by pouring a molten thermoplastic elastomer in a form having the negative of the desired chevron profile and applying thereon the belt core having the one or more reinforcement members embedded therein.
  • Forming the chevron profiling and the top cover as one piece provides the advantage of reduced manufacturing costs and simplified transport of the conveyor belt.
  • thermoplastic elastomers also provide favorable characteristic for use as a bottom cover on the pulley side, such as in particular a low coefficient of friction. Accordingly, conveyor belts having a top cover and bottom cover which are based on thermoplastic elastomers as the rubber constituent, are preferred in this invention. From a cost and recycling perspective, it is particularly preferred if the top cover 12 on the carrying side and the bottom cover 13 on the pulley side are formed from the same thermoplastic elastomer material.
  • the present invention pertains to a method for the production of a conveyor belt as described above, wherein the method comprises the following steps: i) providing one or more reinforcement members 11 ; ii) embedding the one or more reinforcement members in a belt core 11a; iii) applying a top cover 12 on one side of the belt core; iv) applying a bottom cover 13 on the other side of the belt core; wherein the top cover 12 is prepared with a chevron profiling and at least the top cover 12 or part of it and the chevron profiling are formed from a thermoplastic elastomer.
  • the sequence of the steps iii) and iv) is not of critical relevance to the method, and it is not important, which of the layers is attached to the belt core 11a first.
  • the top cover with a chevron profiling can be prepared by extrusion of a flat layer followed by imprinting thereon of the profile, or by pouring a sufficiently fluid thermoplastic elastomer into a form, which has the negative of the chevron profile and cooling the same to provide the consolidated top cover 12.
  • the attachment of the top and bottom covers can be performed e.g. by heatpressing or by application of an adhesive, by means of which the respective layers are attached to one another.
  • inventive conveyor belts provide particular advantages for the transport of particulate material, where the materials have to be elevated to a higher level.
  • the chevron profile hinders the particulate material from sliding down the belts, where when the belt is at higher inclination angles.
  • another aspect of the invention concerns a use of the inventive conveyor belt for conveying particulate material, wherein the conveyor belt is used at least partially at an angle of inclination of more than 20° and preferably in the range of 25° to 45°.
  • the thermoplastic elastomer is advantageously used at ambient temperature, respectively, at a temperature, which is sufficiently below the melting temperature of the thermoplastic elastomer e.g. at least 50°C below this temperature, more preferably at least 65°C and even more preferably at least 75°C below melting temperature of the thermoplastic elastomer.
  • thermoplastic elastomers have favorable characteristics for belts, which are subjected to high deformation forces in the course of the transport of heavy items. Accordingly, in a further aspect, the present invention pertains to a use of the inventive conveyor belts for the transport of heavy items and/or bulk solid material, in particular in hard rock mining or heavy industrial applications. Exemplary materials to be transported in such applications include rocks, coal or ores.
  • the present invention pertains to a use of a thermoplastic elastomer as a cover material for a conveyor belt having a chevron profile for reducing the weight of the conveyor belt.
  • the present invention pertains to a use of a thermoplastic elastomer as a cover material for a conveyor belt having a chevron profile for improving at least one of the impact energy or the cleanability test rating of the conveyor belt. The respective use involves applying a respective cover of a conveyor belt on a belt carcass to provide the conveyor belt.
  • the present invention pertains to a conveyor belt system, which comprises at least one drive pulley with a motor and one deflection pulley and a conveyor belt as described above.
  • the invention pertains to a process of refurbishing a conveyor belt as described above with a new top cover, where the old top cover is removed from the belt core in a first step, e.g. by means of a heated scraper, and a new top cover having a chevron profiling, wherein the new top cover having a chevron profiling are constituted from a thermoplastic elastomer, is applied on the belt core.
  • the old top cover is at least in part recycled to provide new top cover of respective refurbished conveyor belts.
  • FIG. 1a and 1 b schematic representations of a section through a conveyor belt according to the invention
  • Fig. 2 a schematic plan view of a preferred embodiment of a simply arranged profiling of an inventive conveyor belt
  • Fig. 3 a schematic plan view of a preferred embodiment of a double-arranged profiling of a conveyor belt according to the invention
  • FIG. 4a to 5f schematic plan views of various embodiments of a simply arranged profiling of an inventive conveyor belt
  • FIG. 6a to 6f schematic plan views of various embodiments of a double-arranged profiling of a conveyor belt according to the invention
  • Fig. 7 a drawing and schematic plan view of the Heavy-Duty Chevron Cleat type ,,30-90 R32” designed for a heavy mining application.
  • Fig. 1 a and b shows a schematic representation of a section through a conveyor belt 1 according to the invention.
  • the conveyor belt 1 has a belt body 10 of a width E in the transverse direction Y with a carrying side top cover 12 and a pulley side bottom cover 13. Between the two covers 12, 13, reinforcement members 11 are embedded in the belt core 11a, which extends in the longitudinal direction X and absorb the tensile forces of the conveyor belt 1.
  • reinforcement members 11 or tension members 11 e.g. steel cables 11 in steel cord conveyor belts 1 (e.g. in Fig. 1 a)
  • fabric plies 11 e.g. polyester, polyamide, cotton, polyethylene, polypropylene etc. in fabric conveyor belts 1 (e.g. in Fig. 1 b) or aramid 11 in aramid conveyor belts 1 can be used.
  • the thickness C of the conveyor belt 1 extends in the vertical direction Z, i.e. perpendicular to the transverse direction Y and longitudinal direction X.
  • the top cover 12 has outer edges A, B in the width direction Y, i.e. in the direction perpendicular to the conveying direction X, which are not covered by profiling and which may also be referred to as longitudinal edge 14.
  • a chevron profiling 15-19 is provided, by means of which the conveyed material should be kept fixed even with larger inclination angles of, for example more than 20°.
  • the chevron profiling 15-19 has diagonal elements 15, which are also used in chevron-cleated belts.
  • the diagonal elements 15 are preferably formed integrally with the top cover 12. They are arranged in the region between the edge zones A, B over a width G in the transverse direction Y of the conveyor belt 1 so that they give a V-shape, the tip 16 is aligned in the longitudinal direction X against the conveying direction Q.
  • the tip 16 is supported against the conveying direction by a longitudinal extension 17 or strengthened.
  • Fig. 2 shows a preferred embodiment, where the tip 16 is formed in the conveying direction Q as a semicircle to partially receive the conveyed material in the trough formed thereby and to thereby hold the same.
  • the diagonal elements 15 have interruptions 18 so that the individual diagonal elements 15 in their entirety again give a V-shape. However, the individual diagonal elements 15 have a steeper orientation than their entirety.
  • Fig. 3 shows a double arranged profiling of the preferred embodiment of Fig. 2.
  • the diagonal elements 15 extend both individually and in their entirety both in the conveying direction X and in the transverse direction Y. By this arrangement and possibly also by the interruptions 18 the diagonal elements 15 hold the conveyed material on the top cover 12. In this manner, also if the diagonal elements have a low height D the elements 15 exercise relatively large holding forces on the conveyed material. These forces can be influenced by the configuration of the diagonal elements 15 in the direction of their individual orientation, the alignment of the entirety of the bevel cams 15, their shape and height D, etc.
  • Figs. 4a to 5f show schematic plan views of various further embodiments of a simply arranged profiling 15-19 of a conveyor belt 1 according to the invention.
  • Figs. 6a to 6f show the corresponding views of double-arranged profiles 15-19. These in addition to the illustrations in FIGS. 2 and 3 have longitudinal extensions 19 of the diagonal elements 15 as a lateral holding element for the conveyed material.
  • Fig. 7 shows profiling 15-16 formed according to the design of the Heavy-Duty Chevron Cleat type ,,30-90 R32”, which was specifically developed for a heavy mining application. It has following parameters:
  • Head-base transition angle 8°.
  • a set of belts with covers applied for thermoplastic and rubber belts without chevrons was prepared.
  • the material used for the manufacturing of the belt cover was varied by using different thermoplastic elastomers and conventional rubbers.
  • the respective mechanical properties of the top cover materials are provided in the following table 1 : Table 1 :
  • Test specimen as required in the standard with smooth surface.
  • the TPE materials provide comparable tensile strength and elongation, but significantly better abrasion characteristics compared to the conventional rubber materials. This translates into a longer service lifetime of a respective belt top cover and the entire conveyor belt in standard environmental conditions.
  • the rubbers 2 and 3 correspond to the most commonly used rubber grades (DIN-X and DIN-Y) for belt covers in mining and heavy industrial applications.
  • conveyor belt samples with respective covers were prepared and investigated for the impact energy, which inflicts a first damage to the top belt cover.
  • the testing was performed by dropping a weight of 150 kg on different belt samples having a carcass comprising 1 to 4-plys of fabric reinforcement with the nominal breaking strength of 1000 N/mm (Newton per mm width) with and without breaker in the top cover, which were pre-tensioned in a test rig at the 10% of the nominal breaking strength.
  • the impact head used for the test had a diameter of 25 mm and the form of a hemisphere at its tip.
  • NG “NextGen”-reinforcement; special high strength straight-warp woven fabric carcass, which comprises yarns made of ultra-high molecular weighted polyethylene UHMW-PE and polypropylene PP;
  • EPP stands for a belt with reinforcing fabric having polyester warp threads in the direction of the belt travel, and polyamide weft threads. The two thread types are bound together by an additional polyamide binder yarn. In 1000/2, 1000 indicates the breaking strength of the belt (1000 N/mm) and “2” indicates the number of reinforcing fabric plies.
  • EP stands for the same belt design as in 2, but without the additional polyester binder yarn.
  • Test specimen with a thickness of 2 mm and a surface of 50 mm x 75 mm are assembled in the inner side of a tumbling container with an volume of 4 dm 3 .
  • Wet or dry clay is added to the container and the container is than rotated for 15 min during which the specimen are regularly fully covered with the test medium.
  • the specimen are cleaned with a rubber scraper for dry clay or a plastic scraper for wet clay. After cleaning, the cleanliness of the specimen is rated relatively to other samples on a scale from 1 to 5, where a rating 5 is equivalent to high density polyethylene film.
  • the weight used was 2268 g at a sled weight of 100 g and a COF block weight of 120 g; the block had dimensions of 95.25 x 95.25 x 12.75 mm; the approximate pressure was 2687.5 N/m 2 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Belt Conveyors (AREA)

Abstract

La présente invention concerne des courroies transporteuses présentant un couvercle supérieur sur le côté de support et le couvercle inférieur sur le côté de poulie, le couvercle supérieur sur le côté de support présentant un profilage en chevron, et le couvercle supérieur et le profilage en chevron sur le côté de support étant formés à partir d'un élastomère thermoplastique. La présente invention concerne en outre des procédés de production de courroies transporteuses correspondantes, l'utilisation de courroies transporteuses respectives pour le transport de matériaux solides en vrac, la courroie transporteuse étant utilisée au moins partiellement selon un angle d'inclinaison supérieur à 20° et le matériau solide en vrac étant de préférence un matériau dans des applications d'exploitation minière de roche dure ou industrielles lourdes, et des systèmes de courroie transporteuse qui comprennent des courroies transporteuses respectives.
PCT/EP2023/081065 2022-12-06 2023-11-07 Courroies en élastomère thermoplastique à angle raide et courroies fabriquées à partir d'une combinaison d'un caoutchouc et d'élastomères thermoplastiques avec un abrasif thermoplastique et des crampons en chevron résistant aux chocs pour des applications industrielles minières et lourdes WO2024120725A1 (fr)

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US202263386283P 2022-12-06 2022-12-06
US63/386,283 2022-12-06

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Citations (6)

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US20020175055A1 (en) * 2001-05-14 2002-11-28 Ryde Ronald Fredrick Grooved flexible conveyor belt
US20120053020A1 (en) * 2009-03-13 2012-03-01 Habasit Ag Belt Comprising a Layer of Foamed Soft Thermoplastic Elastomer
CN103910164A (zh) 2013-08-05 2014-07-09 安徽欧耐橡塑工业有限公司 一种耐磨pvg人字花纹输送带及其制备方法
US9771220B1 (en) * 2016-06-09 2017-09-26 Intralox, L.L.C. Conveyor belt with sidewalls
US20180194093A1 (en) * 2017-01-06 2018-07-12 Breco Antriebstechnik Breher Gmbh & Co. Kg Method of production for attaching a profile to a toothed belt
CN215754594U (zh) * 2021-08-25 2022-02-08 青岛双虎橡塑制品有限公司 一种耐磨耐高温效果好的橡胶输送带

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020175055A1 (en) * 2001-05-14 2002-11-28 Ryde Ronald Fredrick Grooved flexible conveyor belt
US20120053020A1 (en) * 2009-03-13 2012-03-01 Habasit Ag Belt Comprising a Layer of Foamed Soft Thermoplastic Elastomer
CN103910164A (zh) 2013-08-05 2014-07-09 安徽欧耐橡塑工业有限公司 一种耐磨pvg人字花纹输送带及其制备方法
US9771220B1 (en) * 2016-06-09 2017-09-26 Intralox, L.L.C. Conveyor belt with sidewalls
US20180194093A1 (en) * 2017-01-06 2018-07-12 Breco Antriebstechnik Breher Gmbh & Co. Kg Method of production for attaching a profile to a toothed belt
CN215754594U (zh) * 2021-08-25 2022-02-08 青岛双虎橡塑制品有限公司 一种耐磨耐高温效果好的橡胶输送带

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