EP0962565A1 - Conveyor belt for high temperature objects - Google Patents
Conveyor belt for high temperature objects Download PDFInfo
- Publication number
- EP0962565A1 EP0962565A1 EP98490013A EP98490013A EP0962565A1 EP 0962565 A1 EP0962565 A1 EP 0962565A1 EP 98490013 A EP98490013 A EP 98490013A EP 98490013 A EP98490013 A EP 98490013A EP 0962565 A1 EP0962565 A1 EP 0962565A1
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- EP
- European Patent Office
- Prior art keywords
- fibers
- threads
- conveyor belt
- stainless steel
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/44—Yarns or threads characterised by the purpose for which they are designed
- D02G3/447—Yarns or threads for specific use in general industrial applications, e.g. as filters or reinforcement
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/12—Threads containing metallic filaments or strips
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D11/00—Double or multi-ply fabrics not otherwise provided for
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
- D03D15/513—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads heat-resistant or fireproof
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
- D10B2331/021—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides aromatic polyamides, e.g. aramides
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/14—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polycondensates of cyclic compounds, e.g. polyimides, polybenzimidazoles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3033—Including a strip or ribbon
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3065—Including strand which is of specific structural definition
- Y10T442/313—Strand material formed of individual filaments having different chemical compositions
- Y10T442/3138—Including inorganic filament
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3382—Including a free metal or alloy constituent
- Y10T442/339—Metal or metal-coated strand
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3382—Including a free metal or alloy constituent
- Y10T442/3463—Plural fabric layers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3472—Woven fabric including an additional woven fabric layer
- Y10T442/3528—Three or more fabric layers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3976—Including strand which is stated to have specific attributes [e.g., heat or fire resistance, chemical or solvent resistance, high absorption for aqueous composition, water solubility, heat shrinkability, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3976—Including strand which is stated to have specific attributes [e.g., heat or fire resistance, chemical or solvent resistance, high absorption for aqueous composition, water solubility, heat shrinkability, etc.]
- Y10T442/3984—Strand is other than glass and is heat or fire resistant
Definitions
- the present invention relates to a conveyor belt intended to be mounted in a high temperature object conveying installation in particular glass objects brought to temperatures up to up to 800 or 900 ° C.
- Conveyor belts used in general consisted of asbestos fibers whose characteristics mechanical and thermal allowed to fulfill the conditions mentioned above in a satisfactory manner.
- the applicant's goal is to offer a tape textile asbestos-free conveyor which can both withstand the tensile and bending forces inherent in the system mechanics of commonly used conveyors that can transport objects at high temperatures, without risk of marking including glass.
- the textile conveyor belt of the invention which consists of at least two layers, namely a outer layer intended to be in contact with objects and a layer internal intended to be in contact with the mechanical system of conveying.
- the cohesion of the layers being provided by bonding threads, the outer layer and the threads of binding are formed of threads composed of fibers, in intimate mixture, on the one hand in stainless steel and on the other hand in a material chosen from those which, brought to high temperature, decompose into carbon; of the more the inner layer is formed of threads having good properties to the both mechanical resistance and thermal resistance.
- the inner layer which must mainly ensure the mechanical resistance to the entire conveyor belt
- the outer layer which must be able to withstand the very high temperature at least in the outer face which is in contact with the transported objects.
- Stainless steel fibers need to be mixed, in intimate mixture, with other fibers to be able to be spun under acceptable conditions.
- the presence in the outer layer and in the fiber bonding threads which, brought to high temperature, decompose into carbon allows to have a state of surface, in cooperation with stainless steel fibers, which do not do not mark objects worn at high temperature, particular of glass objects.
- the fibers, in intimate mixture with the steel stainless, which break down into carbon are paraaramid fibers, in particular those known under the names Kevlar, Twaron, or polybenzimidazole fibers known as designation P.B.I., Zylon.
- the constituent wires of the outer layer and the wires of binding consist of a mixture of 50 to 90% by weight of fibers of stainless steel and 10 to 50% by weight of decomposing fibers high temperature carbon.
- constituent wires of the inner layer are made from para-aramid fibers.
- the outer layer and the inner layer are reinforced by a frame, for example the constituent wires of one and / or the other layer, in warp and weft being a fabric, are reinforced by a metallic continuous filament or any other high resistance filament mechanical and thermal.
- the conveyor belt the invention is obtained by a multiply weaving comprising at least two folds corresponding respectively to the outer layer and to the inner layer.
- the strip conveyor has four plies, the two outer plies being made up, with the binding threads, of an intimate mixture of steel fibers stainless and aramid fibers, while the two inner plies are formed from threads obtained from aramid fibers.
- the four folds are reinforced, in warp and weft, by a continuous filament of reinforcement either metallic or in a high resistance material mechanical and thermal.
- the conveyor belt 1 is a textile belt obtained by the traditional multi-ply weaving technique. It comprises four successive folds 2,3,4,5 (that is to say four superimposed fabrics) whose cohesion is achieved by means of binding threads 6, 7. Each fold 2,3,4,5 is formed by warp threads 8 and by weft threads 9. The superposition of the four folds is blocked by the binding threads which pass alternately from the upper face 2 to the first fold 2 up to the lower face 5b of the fourth fold 5. The crossing of the binding threads 6, 7 takes place in the zones located between the successive weft threads 9.
- the textile strip 1 as illustrated in the figure, has a structure perfectly symmetrical from one face to the other.
- the composition of the different plies and threads can be distinguished according to whether the folds are intended to be turned to the mechanical conveying system or are intended to support high temperature objects.
- the objects brought to high temperature are intended to come into contact with the upper face 2 a of the first fold 2, while the lower face 5 b of the fourth fold 5 is intended to be in contact with the tensioning rollers and drive system.
- the chain son 8 constituting the first ply are threads obtained from an intimate mixture of steel fibers stainless and para-aramid fibers, at a blend of 70% by weight of 316L 12microns stainless steel fibers and 30% para-aramid fibers such as Kevlar or Twaron.
- the wires of the weft constituting the first ply are also obtained from a intimate blend of stainless steel fibers and para-aramid fibers so that no surface appears on the surface of the strip 1 wire not containing stainless steel.
- the warp threads and the weft threads of the fourth fold 5 are consisting of threads obtained from para-aramid fibers of the type Kevlar.
- the binding threads 6, 7 are, for their part, obtained from a intimate blend of stainless steel fibers and para-aramid fibers Kevlar type, 50 to 90% of stainless steel fibers and 10 to 50% Kevlar fibers.
- the second fold 3 had the same composition as the first fold 2, while the third fold 4 had the same composition as the fourth fold 5.
- the para-aramid fibers which make it possible to obtain a suitable spinning of the stainless steel fibers, in intimate mixture with them, have the characteristic of decomposing in the form of carbon at temperatures of the order of 800 or 900 ° C. This decomposition is in no way prohibitive, on the contrary since it gives the surface portion of the conveyor belt 1, a surface condition which does not cause any marking on the objects brought to high temperature, in particular glass objects.
- the present invention is not limited to the preferred mode of realization which has just been described by way of non-exhaustive example.
- fibers than paraaramid fibers for the constitution of the outer layer, i.e. the first fold, namely in particular polybenzimidazole fibers, which like the polyaramid fibers break down into carbon when they are brought to high temperature.
- the inner layer formed by the fourth fold 5 is insulated thermally by the superposition of the other three folds 2,3,4.
- the warp and weft threads constituting all or part of the layers can be reinforced with continuous metallic filaments or other filaments with high mechanical and thermal resistance.
- the composition of the third and fourth son forming the inner layer differs from that of the first and second wire forming the outer layer.
- This solution presents a definite advantage in terms of cost price, due to the higher cost stainless steel fibers.
- threads made from a mixture intimate of stainless steel fibers and para-aramid fibers Interest could in particular consist in the manufacture of a strip perfectly symmetrical both in structure and composition and having therefore not a reverse side and a right side.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Belt Conveyors (AREA)
Abstract
Description
La présente invention concerne une bande transporteuse destinée à être montée dans une installation de convoyage d'objets à haute température notamment d'objets en verre portés à des températures pouvant aller jusqu'à 800 ou 900 °C.The present invention relates to a conveyor belt intended to be mounted in a high temperature object conveying installation in particular glass objects brought to temperatures up to up to 800 or 900 ° C.
Dans l'industrie verrière , au cours du processus de fabrication, des objets en verre portés à des températures pouvant aller jusqu'à 800 ou 900 °C sont transportés par des convoyeurs à bande textile. Ces bandes transporteuses qui sont tendues et supportées par des galets doivent d'une part supporter les efforts de traction et de flexion inhérents au système mécanique de convoyage et d'autre part résister à la température des objets en verre sans provoquer de défaut de surface de ceux-ci.In the glass industry, during the manufacturing process, glass objects brought to temperatures up to 800 or 900 ° C are transported by textile belt conveyors. These conveyor belts which are stretched and supported by rollers must on the one hand withstand the inherent tensile and bending forces to the mechanical conveying system and on the other hand resist the temperature of glass objects without causing a surface defect these.
Les bandes transporteuses mises en oeuvre de manière générale étaient constituées de fibres d'amiante dont les caractéristiques mécaniques et thermiques permettaient de remplir les conditions précitées de façon satisfaisante.Conveyor belts used in general consisted of asbestos fibers whose characteristics mechanical and thermal allowed to fulfill the conditions mentioned above in a satisfactory manner.
Cependant , on sait que l'amiante est toxique et qu'elle est maintenant interdite d'utilisation. Aucune autre fibre ne présente les mêmes caractéristiques mécaniques et thermiques que celles montrées par l'amiante. Il n'est donc pas envisageable d'obtenir une bande transporteuse textile répondant au même cahier des charges que ci-dessus par simple substitution des fibres d'amiante par une autre fibre.However, we know that asbestos is toxic and that it is now prohibited from use. No other fiber has the same mechanical and thermal characteristics as those shown by asbestos. It is therefore not possible to obtain a band textile conveyor meeting the same specifications as above by simple substitution of the asbestos fibers by another fiber.
Le but que s'est fixé le demandeur est de proposer une bande transporteuse textile qui soit exempte d'amiante, qui puisse à la fois supporter les efforts de traction et de flexion inhérents au système mécanique des convoyeurs couramment utilisés et qui puisse transporter des objets à des températures élevées , sans risque de marquage notamment du verre.The applicant's goal is to offer a tape textile asbestos-free conveyor which can both withstand the tensile and bending forces inherent in the system mechanics of commonly used conveyors that can transport objects at high temperatures, without risk of marking including glass.
Ce but est parfaitement atteint par la bande transporteuse textile de l'invention qui est constituée d'au moins deux couches à savoir une couche externe destinée à être en contact avec les objets et une couche interne destinée à être en contact avec le système mécanique de convoyage. De manière caractéristique selon l'invention,la cohésion des couches étant assurée par des fils de liage, la couche externe et les fils de liage sont formés de fils composés de fibres , en mélange intime, d'une part en acier inoxydable et d'autre part en un matériau choisi parmi ceux qui, portés à haute température, se décomposent en carbone ; de plus la couche interne est formée de fils ayant de bonnes propriétés à la fois de résistance mécanique et de résistance thermique.This goal is perfectly achieved by the textile conveyor belt of the invention which consists of at least two layers, namely a outer layer intended to be in contact with objects and a layer internal intended to be in contact with the mechanical system of conveying. Typically according to the invention, the cohesion of the layers being provided by bonding threads, the outer layer and the threads of binding are formed of threads composed of fibers, in intimate mixture, on the one hand in stainless steel and on the other hand in a material chosen from those which, brought to high temperature, decompose into carbon; of the more the inner layer is formed of threads having good properties to the both mechanical resistance and thermal resistance.
Selon la structure particulière de la bande transporteuse de l'invention, c'est la couche interne qui doit principalement assurer la résistance mécanique à l'ensemble de la bande transporteuse , tandis que c'est la couche externe qui doit pouvoir résister à la très haute température au moins dans la face extérieure qui est en contact avec les objets transportés. Les fibres d'acier inoxydable ont besoin d'être mélangées, en mélange intime, avec d'autres fibres pour pouvoir être filées dans des conditions acceptables. De plus la présence dans la couche externe et dans les fils de liage de fibres qui , portées à haute température, se décomposent en carbone permet d'avoir un état de surface, en coopération avec les fibres d'acier inoxydable, qui ne marquent pas les objets portés à haute température , s'agissant en particulier d'objets en verre. Ainsi le contact des objets à haute température avec la portion superficielle de la couche externe et des fils de liage entraíne la décomposition des fibres autres que l'acier inoxydable en carbone. Cette décomposition qui présente l'avantage d'obtenir un état de surface n'entraínant pas de marquage ne provoque pas d'inconvénient rédhibitoire dans la mesure où les fils de la couche externe et les fils de liage, dans cette portion superficielle, ne sont pas soumises à des efforts mécaniques particuliers puisque ces efforts sont supportés principalement par la couche interne de la bande transporteuse. Depending on the particular structure of the conveyor belt the invention, it is the inner layer which must mainly ensure the mechanical resistance to the entire conveyor belt, while it is the outer layer which must be able to withstand the very high temperature at least in the outer face which is in contact with the transported objects. Stainless steel fibers need to be mixed, in intimate mixture, with other fibers to be able to be spun under acceptable conditions. In addition, the presence in the outer layer and in the fiber bonding threads which, brought to high temperature, decompose into carbon allows to have a state of surface, in cooperation with stainless steel fibers, which do not do not mark objects worn at high temperature, particular of glass objects. So the contact of objects with high temperature with the surface portion of the outer layer and the wires bonding causes the decomposition of fibers other than stainless steel carbon. This decomposition which has the advantage of obtaining a surface condition not causing marking does not cause of unacceptable disadvantage insofar as the son of the layer external and the binding threads, in this surface portion, are not subjected to particular mechanical forces since these forces are supported mainly by the inner layer of the strip conveyor.
De préférence, les fibres, en mélange intime avec l'acier inoxydable, qui se décomposent en carbone sont des fibres de paraaramide, notamment celles connues sous les dénominations Kevlar, Twaron, ou encore des fibres de polybenzimidazole connues sous la dénomination P.B.I., Zylon.Preferably, the fibers, in intimate mixture with the steel stainless, which break down into carbon are paraaramid fibers, in particular those known under the names Kevlar, Twaron, or polybenzimidazole fibers known as designation P.B.I., Zylon.
De préférence, les fils constitutifs de la couche externe et les fils de liage sont constitués d'un mélange de 50 à 90% en poids de fibres d'acier inoxydable et de 10 à 50% en poids de fibres se décomposant à haute température en carbone.Preferably, the constituent wires of the outer layer and the wires of binding consist of a mixture of 50 to 90% by weight of fibers of stainless steel and 10 to 50% by weight of decomposing fibers high temperature carbon.
De préférence les fils constitutifs de la couche interne sont réalisés à partir de fibres de para-aramide.Preferably the constituent wires of the inner layer are made from para-aramid fibers.
Avantageusement, pour augmenter la stabilité dimensionnelle de la bande transporteuse face aux contraintes mécaniques du système de convoyage, la couche externe et la couche interne sont renforcées par une armature , par exemple les fils constitutifs de l'une et/ou l'autre couche, en chaíne et en trame s'agissant d'un tissu, sont renforcés par un filament continu métallique ou tout autre filament à haute résistance mécanique et thermique.Advantageously, to increase the dimensional stability of the conveyor belt facing the mechanical constraints of the conveying, the outer layer and the inner layer are reinforced by a frame, for example the constituent wires of one and / or the other layer, in warp and weft being a fabric, are reinforced by a metallic continuous filament or any other high resistance filament mechanical and thermal.
Dans un mode préféré de réalisation, la bande transporteuse de l'invention est obtenue par un tissage multiplis comportant au moins deux plis correspondant respectivement à la couche externe et à la couche interne.In a preferred embodiment, the conveyor belt the invention is obtained by a multiply weaving comprising at least two folds corresponding respectively to the outer layer and to the inner layer.
Dans ce mode de réalisation, préférentiellement la bande transporteuse comporte quatre plis, les deux plis extérieurs étant constitués, avec les fils de liage, d'un mélange intime de fibres d'acier inoxydable et de fibres d'aramide, tandis que les deux plis intérieurs sont formés de fils obtenus à partir de fibres d'aramide .In this embodiment, preferably the strip conveyor has four plies, the two outer plies being made up, with the binding threads, of an intimate mixture of steel fibers stainless and aramid fibers, while the two inner plies are formed from threads obtained from aramid fibers.
De préférence, dans cette dernière configuration, les quatre plis sont renforcées , en chaíne et en trame, par un filament continu de renfort soit métallique soit dans un matériau à haute résistance mécanique et thermique. Preferably, in this latter configuration, the four folds are reinforced, in warp and weft, by a continuous filament of reinforcement either metallic or in a high resistance material mechanical and thermal.
La présente invention sera mieux comprise à la lecture de la description qui va être faite d'un exemple préféré de réalisation d'une bande transporteuse d'objets à haute température ,à quatre plis, illustré par le dessin annexé dans lequel la figure unique est une représentation très schématisée en coupe longitudinale de ladite bande.The present invention will be better understood on reading the description which will be given of a preferred embodiment of a four-ply high temperature object conveyor belt, illustrated by the attached drawing in which the single figure is a representation very schematically in longitudinal section of said strip.
La bande transporteuse 1 est une bande textile obtenue par la
technique traditionnelle de tissage multiplis. Elle comporte quatre plis
successifs 2,3,4,5 (c'est-à-dire quatre tissus superposés) dont la
cohésion est réalisée grâce à des fils de liage 6, 7 . Chaque pli 2,3,4,5
est formé par des fils de chaíne 8 et par des fils de trame 9. La
superposition des quatre plis est bloquée par les fils de liage qui passent
alternativement de la face supérieure 2a du premier pli 2 jusqu'à la face
inférieure 5b du quatrième pli 5. La traversée des fils de liage 6, 7 se fait
dans les zones situées entre les fils de trame 9 successifs.The conveyor belt 1 is a textile belt obtained by the traditional multi-ply weaving technique. It comprises four
La bande textile 1 ,telle qu'illustrée sur la figure, a une structure parfaitement symétrique d'une face à l'autre. Cependant dans l'application visée par l'invention, à savoir d'une bande transporteuse d'objets à haute température, la composition des différents plis et des fils de liage peut se distinguer selon que les plis sont destinés à être tournés vers le système mécanique de convoyage ou sont destinés à supporter les objets à haute température.The textile strip 1, as illustrated in the figure, has a structure perfectly symmetrical from one face to the other. However in the application targeted by the invention, namely a conveyor belt high temperature objects, the composition of the different plies and threads can be distinguished according to whether the folds are intended to be turned to the mechanical conveying system or are intended to support high temperature objects.
Plus précisément les objets portés à haute température sont destinés à venir en contact avec la face supérieure 2a du premier pli 2, tandis que la face inférieure 5b du quatrième pli 5 est destinée à être en contact avec les galets de mise sous tension et d'entraínement du système de convoyage.More precisely, the objects brought to high temperature are intended to come into contact with the upper face 2 a of the first fold 2, while the lower face 5 b of the fourth fold 5 is intended to be in contact with the tensioning rollers and drive system.
Dans ces conditions, les fils de chaíne 8 constitutifs du premier pli sont des fils obtenus à partir d'un mélange intime de fibres d'acier inoxydable et de fibres de para-aramide, à raison d'un mélange de 70% en poids de fibres d'acier inoxydable 316L 12microns et de 30% de fibres de para-aramide de type Kevlar ou Twaron. De préférence, les fils de trame constitutifs du premier pli sont également obtenus à partir d'un mélange intime de fibres d'acier inoxydable et de fibres de para-aramide de manière à ce que ne transparaisse, en surface de la bande 1, aucun fil ne contenant pas d'acier inoxydable.Under these conditions, the chain son 8 constituting the first ply are threads obtained from an intimate mixture of steel fibers stainless and para-aramid fibers, at a blend of 70% by weight of 316L 12microns stainless steel fibers and 30% para-aramid fibers such as Kevlar or Twaron. Preferably, the wires of the weft constituting the first ply are also obtained from a intimate blend of stainless steel fibers and para-aramid fibers so that no surface appears on the surface of the strip 1 wire not containing stainless steel.
Les fils de chaíne et les fils de trame du quatrième pli 5 sont constitués de fils obtenus à partir de fibres de para-aramide du type Kevlar.The warp threads and the weft threads of the fourth fold 5 are consisting of threads obtained from para-aramid fibers of the type Kevlar.
Les fils de liage 6, 7 sont , quant à eux, obtenus à partir d'un
mélange intime de fibres d'acier inoxydable et de fibres de para-aramide
du type Kevlar, à raison de 50 à 90 % de fibres d'acier inoxydable et
de 10 à 50% de fibres de Kevlar.The
Dans un exemple précis de réalisation, le deuxième pli 3 avait la
même composition que le premier pli 2, tandis que le troisième pli 4 avait
la même composition que le quatrième pli 5.In a specific embodiment, the
C'est la portion superficielle du premier pli 2 ainsi que des fils de
liage 6, 7 venant au niveau de la surface 2a du premier pli 2 qui sont en
contact avec les objets à haute température et qui doivent comporter la
plus haute résistance thermique. Les fibres de para-aramide, qui
permettent d'obtenir un filage convenable des fibres d'acier inoxydable,
en mélange intime avec celles-ci, ont pour caractéristique de se
décomposer sous forme de carbone à des températures de l'ordre de
800 ou 900°C. Cette décomposition n'est en rien rédhibitoire bien au
contraire puisqu'elle confère à la portion superficielle de la bande
transporteuse 1, un état de surface qui ne provoque aucun marquage sur
les objets portés à haute température, en particulier les objets en verre.
Cette décomposition, qui peut entraíner une certaine perte de résistance
mécanique, n'est pas gênante de ce point de vue puisque la résistance
mécanique de la bande transporteuse 1 est conférée principalement par
les troisième et quatrième plis qui sont réalisés en fils formés de fibres de
para-aramide, bien connus pour leur très haute résistance mécanique.This is the surface portion of the first ply 2 and the
La présente invention n'est pas limitée au mode préféré de réalisation qui vient d'être décrit à titre d'exemple non exhaustif. En particulier il est possible d'utiliser d'autres fibres que les fibres de paraaramide pour la constitution de la couche externe, c'est-à-dire du premier pli ,à savoir notamment des fibres de polybenzimidazole, qui comme les fibres de polyaramide se décomposent en carbone lorsqu'elles sont portées à haute température.The present invention is not limited to the preferred mode of realization which has just been described by way of non-exhaustive example. In particular it is possible to use other fibers than paraaramid fibers for the constitution of the outer layer, i.e. the first fold, namely in particular polybenzimidazole fibers, which like the polyaramid fibers break down into carbon when they are brought to high temperature.
On comprend que plus la couche interne est éloignée de la
couche externe, et moins les propriétés de résistance thermique, requises
pour cette couche interne sont importantes. Dans le cas illustré ci-dessus,la
couche interne constituée par le quatrième pli 5, est isolée
thermiquement par la superposition des trois autres plis 2,3,4.It is understood that the further the inner layer is from the
outer layer, and less required thermal resistance properties
for this inner layer are important. In the case illustrated above, the
inner layer formed by the fourth fold 5, is insulated
thermally by the superposition of the other three
Si besoin est , il est possible d'augmenter la stabilité dimensionnelle de la bande en la renforçant à l'aide d'une armature. Par exemple les fils de chaíne et de trame constitutifs de tout ou partie des couches peuvent être renforcés par des filaments continus métalliques ou autres filaments à haute résistance mécanique et thermique.If necessary, it is possible to increase the stability of the strip by reinforcing it with a reinforcement. Through example the warp and weft threads constituting all or part of the layers can be reinforced with continuous metallic filaments or other filaments with high mechanical and thermal resistance.
Dans l'exemple décrit ci-dessus, la composition des troisième et quatrième fils formant la couche interne diffère de celle des premier et deuxième fils formant la couche externe. Cette solution présente un avantage certain au niveau du prix de revient, du fait du coût plus élevé des fibres d'acier inoxydable. Cependant, rien n'empêche techniquement d'utiliser , pour la couche interne, des fils réalisés à partir d'un mélange intime de fibres d'acier inoxydable et de fibres de para-aramide. L'intérêt pourrait notamment consister dans la fabrication d'une bande parfaitement symétrique tant en structure qu'en composition et n'ayant donc pas une face envers et une face endroit.In the example described above, the composition of the third and fourth son forming the inner layer differs from that of the first and second wire forming the outer layer. This solution presents a definite advantage in terms of cost price, due to the higher cost stainless steel fibers. However, nothing technically prevents to use, for the inner layer, threads made from a mixture intimate of stainless steel fibers and para-aramid fibers. Interest could in particular consist in the manufacture of a strip perfectly symmetrical both in structure and composition and having therefore not a reverse side and a right side.
Claims (8)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98490013A EP0962565B1 (en) | 1998-05-26 | 1998-05-26 | Conveyor belt for high temperature objects |
DE69800572T DE69800572T2 (en) | 1998-05-26 | 1998-05-26 | Conveyor belt for high heat bodies |
ES98490013T ES2159425T3 (en) | 1998-05-26 | 1998-05-26 | CONVEYOR BELT FOR HIGH TEMPERATURE OBJECTS. |
US09/317,376 US6294489B1 (en) | 1998-05-26 | 1999-05-24 | Belt for conveying articles at high temperature |
HK00103463A HK1026237A1 (en) | 1998-05-26 | 2000-06-08 | Conveyor belt for high temperature objects |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98490013A EP0962565B1 (en) | 1998-05-26 | 1998-05-26 | Conveyor belt for high temperature objects |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0962565A1 true EP0962565A1 (en) | 1999-12-08 |
EP0962565B1 EP0962565B1 (en) | 2001-03-07 |
Family
ID=8235798
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98490013A Expired - Lifetime EP0962565B1 (en) | 1998-05-26 | 1998-05-26 | Conveyor belt for high temperature objects |
Country Status (5)
Country | Link |
---|---|
US (1) | US6294489B1 (en) |
EP (1) | EP0962565B1 (en) |
DE (1) | DE69800572T2 (en) |
ES (1) | ES2159425T3 (en) |
HK (1) | HK1026237A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AUPR972701A0 (en) * | 2001-12-21 | 2002-01-24 | Herd Bars & Bodies Pty Ltd | Belt webbing |
WO2003031292A2 (en) * | 2002-02-01 | 2003-04-17 | Bernath + Partner Ag | Heat-resistant conveyor belt |
CN100404397C (en) * | 2004-02-09 | 2008-07-23 | 中德(扬州)输送工程技术有限公司 | Thermotolerant high temperature belt for round pipe rubber belt conveyor |
FR2870222B1 (en) * | 2004-05-11 | 2006-08-11 | E Bourgeois Soc Par Actions Si | CONVEYOR BELT IN PARA-ARAMIDE YARN |
US7428963B2 (en) * | 2006-08-08 | 2008-09-30 | Etablissements E. Bourgeois | Conveyor belt made of para-aramid threads |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62199842A (en) * | 1986-02-25 | 1987-09-03 | 株式会社アスク | Heat resistant multiple fabric material |
DE3843811A1 (en) * | 1988-12-24 | 1990-07-05 | Alwit Gmbh Produktions Und Han | Conveyor belt |
US5399418A (en) * | 1991-12-21 | 1995-03-21 | Erno Raumfahrttechnik Gmbh | Multi-ply textile fabric especially for protection suits and the like |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03216329A (en) * | 1990-01-22 | 1991-09-24 | Nippon Steel Chem Co Ltd | Fiber reinforced composite belt |
DE9414344U1 (en) * | 1994-09-03 | 1994-10-20 | Mühlen Sohn GmbH & Co., 89134 Blaustein | Woven belt for a corrugated cardboard machine |
JPH09228171A (en) * | 1996-02-19 | 1997-09-02 | Toyobo Co Ltd | Highly heat-resistant blended spun yarn |
-
1998
- 1998-05-26 DE DE69800572T patent/DE69800572T2/en not_active Expired - Lifetime
- 1998-05-26 ES ES98490013T patent/ES2159425T3/en not_active Expired - Lifetime
- 1998-05-26 EP EP98490013A patent/EP0962565B1/en not_active Expired - Lifetime
-
1999
- 1999-05-24 US US09/317,376 patent/US6294489B1/en not_active Expired - Lifetime
-
2000
- 2000-06-08 HK HK00103463A patent/HK1026237A1/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62199842A (en) * | 1986-02-25 | 1987-09-03 | 株式会社アスク | Heat resistant multiple fabric material |
DE3843811A1 (en) * | 1988-12-24 | 1990-07-05 | Alwit Gmbh Produktions Und Han | Conveyor belt |
US5399418A (en) * | 1991-12-21 | 1995-03-21 | Erno Raumfahrttechnik Gmbh | Multi-ply textile fabric especially for protection suits and the like |
Non-Patent Citations (1)
Title |
---|
DATABASE WPI Section Ch Week 8741, Derwent World Patents Index; Class A23, AN 87-287562, XP002082170 * |
Also Published As
Publication number | Publication date |
---|---|
US6294489B1 (en) | 2001-09-25 |
ES2159425T3 (en) | 2001-10-01 |
EP0962565B1 (en) | 2001-03-07 |
DE69800572T2 (en) | 2001-06-28 |
DE69800572D1 (en) | 2001-04-12 |
HK1026237A1 (en) | 2000-12-08 |
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