EP0407715A1 - Transport aprons for yarns - Google Patents

Transport aprons for yarns Download PDF

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Publication number
EP0407715A1
EP0407715A1 EP90109908A EP90109908A EP0407715A1 EP 0407715 A1 EP0407715 A1 EP 0407715A1 EP 90109908 A EP90109908 A EP 90109908A EP 90109908 A EP90109908 A EP 90109908A EP 0407715 A1 EP0407715 A1 EP 0407715A1
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EP
European Patent Office
Prior art keywords
belt
layer
transport
mandrel
shrink film
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Application number
EP90109908A
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German (de)
French (fr)
Inventor
Horst Bockemühl-Wüllenweber
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BOCKEMUEHL WUELLENWEBER HORST
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BOCKEMUEHL WUELLENWEBER HORST
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Publication of EP0407715A1 publication Critical patent/EP0407715A1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/86—Aprons; Apron supports; Apron tensioning arrangements

Definitions

  • the invention relates to a conveyor belt of the type specified in the preamble of claim 1.
  • conveyor belts are used in yarn processing machines to transport and guide the yarn or roving between rollers. It is common to provide a yarn transport path between two parallel transport belts or between a transport belt and a roller.
  • the usual transport belts consist of elastomers or leather, with a reinforcing layer of fiber material, for example cords or threads, usually being embedded in the transport belt.
  • the production of such transport belts requires great care to ensure the required dimensional accuracy.
  • the belt is built up on a mandrel, with the lower elastomer layer being applied first.
  • the reinforcing layer made of fiber material is applied to this lower elastomer layer and this is covered with the upper elastomer layer.
  • the outer elastomer layers bond to one another while embedding the reinforcement layer. If the lower layer is not exactly true to size, a belt sleeve of too large or too small diameter is created.
  • tensioning devices are often not provided in belt transport devices of textile machines, so that the transport belt must have a precisely defined length. Even slight deviations in length lead to yarn slip, yarn irregularities or premature wear. At very fast running belts, such as those used for texturing, can cause vibration.
  • Another problem is that the conveyor belt on the side of the belt that comes into contact with the yarn to be transported must have a certain grip, while the other side, together with the components with which it comes into contact, should have a low coefficient of friction . If the belt is deflected sharply, deflection rollers cannot be used, but the belt must run around the edge of a sheet. In the event that the inside of the belt with the sheet forms a high coefficient of friction, a high transport resistance, abrasion and possibly loop formation of the belt, if a tensioning device is present.
  • DE-U-1 739 433 describes a two-layer spinning belt.
  • the outer layer of this spinning strap is made of rubber and the inner layer consists of a fabric layer, the spaces between which are filled with rubber or another elastomer material.
  • a disadvantage of this spinning strap is that both elastomer material and parts of the fabric layer are present on the inner surface. The inner surface therefore has the high coefficient of friction of elastomeric material, so that when the belt runs over solid parts, considerable friction occurs.
  • a strap for a textile fiber drafting system is known. This apron is made in one layer by extruding a belt sleeve made of polymer material. The belt sleeve or that Strappy is then blown over a mandrel, wrapped with tissue or other wrapping material and then heated, after which the wrapping is removed. Then the strap is pulled off the mandrel and cooled.
  • Such a single-layer strap consists exclusively of elastomer material. Its relatively high elasticity is undesirable in practical use. The friction and entrainment properties of both surfaces are essentially the same.
  • the invention has for its object to provide a conveyor belt of the type specified in the preamble of claim 1, which can be manufactured easily and with high dimensional accuracy and which has a lower coefficient of friction on one belt surface than on the other belt surface.
  • the reinforcement layer consists of a pre-stretched and then shrunk plastic film.
  • This shrink film forms the inner surface of the belt, so that the reinforcing layer fulfills two functions simultaneously, namely on the one hand the reinforcing function and on the other hand the formation of a non-grip, inelastic, smooth inner surface with a low coefficient of friction.
  • only two layers of single-layer layers are required for the belt structure.
  • the shrink film is shrunk onto a mandrel and the elastomer layer is attached to the shrink film.
  • the connecting both layers are done by adhesion promoters, whereby heat can be used if necessary.
  • the radial sleeve and the subsequent shrinking give the belt sleeve or the belt an elasticity which is limited to a minimum and which is considerably less than that of elastomers.
  • the belt thus has a very high level of dimensional stability, which is also maintained during operation.
  • the usual fiber drafting systems allow tolerances for the belt length of ⁇ 0.15 mm.
  • tolerances of ⁇ 0.10 mm can be maintained without difficulty even in the case of prolonged operation. Due to the low coefficient of friction on the inside, this inside remains smooth even after long periods of use.
  • the reinforcement layer consisting of the shrink film, which transmits the tensile load of the drive belt, only needs to have a low thickness of less than 50 ⁇ m.
  • the straps can therefore be made with a very small strap thickness.
  • the outer elastomer layer serves to transport and stretch the fiber material.
  • the invention further relates to a method for producing a transport belt, wherein a radially pre-stretched shrink tube is shrunk onto a cylindrical mandrel. An elastomer layer is then placed on the shrink tube and the two layers are bonded together using an adhesive at temperatures above 80 ° C. After cooling, the mandrel is removed. The individual belts are separated from the belt sleeve thus obtained.
  • the increased dimensional stability of the transport belt according to the invention results from the fact that the shrink tube on the mandrel receives its exact dimensions and that an elastomer layer of a predetermined thickness is connected to the shrink tube.
  • the dimensional inaccuracies that usually result from the use of an elastomer inner layer are avoided.
  • a reinforcement layer made of fiber material requires embedding, since the fiber reinforcement layer does not adhere to the inside of the belt.
  • the reinforcement layer in which the reinforcement layer consists of a continuous film, the reinforcement layer can form an inner surface of the belt.
  • the use of shrink film not only enables the belt to be dimensionally accurate, it also creates a very smooth inner surface with a low coefficient of friction.
  • the transport belt generally does not require a reinforcement insert made of fiber material, such a reinforcement insert can be present to increase the tensile strength.
  • the reinforcement insert can be embedded at the boundary layer between the shrink film and the elastomer layer. Even in the case of a reinforcement insert made of fiber material, there is the advantage of a smooth and wear-resistant inner surface of the belt, which is not sticky.
  • the shrink film can for example consist of a polyamide or a polyester. Natural rubber or synthetic rubber and thermoplastic elastomers can be used as elastomer materials.
  • the in the Figs. 1 and 2 shown conveyor belt consists of an endless belt 10 of two layers. Inside is the reinforcement layer 11 made of a shrunk shrink film made of polyamide or polyester and on the outside there is the elastomer layer 12. The two layers 11 and 12 are firmly connected to one another by thermal vulcanization, optionally using an adhesive agent (adhesive).
  • the elastomer layer 12 has a much greater thickness than the shrink film 11. In this regard, the drawing is not to scale. In reality, the thickness of the elastomer layer is at least about five times the thickness of the shrink film 11.
  • the shrink film has a thickness of less than 50 ⁇ m. This thickness is preferably 20 to 30 ⁇ m.
  • FIG. 3 shows the structure of a belt sleeve on a cylindrical mandrel 13, the thickness of the layers 11 and 12 in relation to the diameter of the mandrel 13 and in relation to one another likewise not being drawn to scale.
  • a radially pre-stretched shrink tube is drawn onto the mandrel 13, the diameter of which is larger than that of the mandrel 13 and which can therefore be easily pushed over the mandrel. Then the film tube sitting on the mandrel 13 is heated so that it shrinks and lies firmly against the outer surface of the mandrel 13. An adhesion promoter 14 is then applied to the shrunk shrink film 11 and then the elastomer layer 12 is applied to the shrink film.
  • the elastomer layer can be in sheets or helically wound strips.
  • the layer structure seated on the mandrel 13 is vulcanized at approximately 150 ° C., the shrink film firmly connecting to the elastomer layer 12 arranged above it. After vulcanization, cooling takes place.
  • the shrink film is fixed when it cools down at about 80 ° C so that it then no longer changes its shape and is also not elastic.
  • the diameter of the metal mandrel 13 is reduced even further below 80 ° C., so that the belt sleeve can easily be pulled off the mandrel 13 in the cold state.
  • the belt sleeve is then cut into individual transport belts 10.
  • the wall thickness of the conveyor belt is approximately 1 mm.
  • FIG. 4 differs from the first embodiment only in that an additional reinforcement insert 23 made of fiber material is embedded between the shrink film 11 and the elastomer layer 12. This can be helically wound individual threads, fiber mats, fabrics or the like. act.
  • Fig. 5 shows an embodiment for the use of the conveyor belt 10 in a high drafting device for stretching roving 15, which is fed to a spinning machine or roving machine.
  • the roving 15, which has a relatively large fiber thickness, is stretched between two roller pairs 16 and 17, the downstream roller pair 17 having a greater peripheral speed than the upstream roller pair 16.
  • the roving 15 is between two guide devices 18.19 led.
  • Each of the guide devices has a belt roller 20 around which the transport belt 10 rotates.
  • the conveyor belts 10 must be brought as close as possible to the roller gap. Therefore, there are no deflection rollers at this end, but guide plates 21, at the edges of which the belts 10 are deflected.
  • the belts 10 have the shrink film 11 on their inside, so that the deflection plates 21 come into contact with the smooth, inelastic shrink film 11, while the roving 15 comes into contact with the non-slip elastomer layer 12 on the outside.

Abstract

In the transport apron (10), the reinforcing layer consists of a shrunk shrinkable sleeve (11) which at the same time forms an inner face of the apron. The outer face is formed by an elastomeric layer (12). The apron has a smooth inner face and an outer face of greater adhesion. The reinforcing layer at the same time forms the smooth inner layer. The transport apron can be produced with high dimensional accuracy. It is suitable for taking up yarn with its elastomeric face and for low-friction and low-wear running round deflecting devices with its smooth face. <IMAGE>

Description

Die Erfindung betrifft einen Transportriemen der im Oberbegriff des Patentanspruchs 1 angegebenen Art.The invention relates to a conveyor belt of the type specified in the preamble of claim 1.

Bei der Verarbeitung von Textilgarnen werden in Garn­verarbeitungsmaschinen Transportriemen eingesetzt, die das Garn oder Vorgarn zwischen Walzen transportieren und führen. Es ist üblich, eine Garntransportstrecke zwischen zwei parallelen Transportriemen oder zwischen einem Transportriemen und einer Walze vorzusehen. Die üblichen Transportriemen bestehen aus Elastomeren oder Leder, wobei normalerweise im Transportriemen eine Ver­stärkungsschicht aus Fasermaterial, z.B. Kords oder Fäden, eingebettet ist. Die Herstellung solcher Trans­portriemen erfordert sehr große Sorgfalt, um die be­nötigte Maßhaltigkeit zu gewährleisten. Der Aufbau des Riemens erfolgt auf einem Dorn, wobei zunächst die untere Elastomerschicht aufgebracht wird. Auf diese untere Elastomerschicht wird die Verstärkungsschicht aus Fasermaterial aufgebracht und diese wird mit der oberen Elastomerschicht belegt. In einer nachfolgenden Wärmebehandlung verbinden sich die äußeren Elastomer­schichten unter Einbettung der Verstärkungsschicht mit­einander. Wenn die untere Schicht nicht exakt maßhaltig ist, entsteht eine Riemenhülse von zu großem oder zu kleinem Durchmesser. Aus Platzgründen sind häufig bei Riemen-Transportvorrichtungen von Textilmaschinen keine Spanneinrichtungen vorgesehen, so daß der Transport­riemen eine genau bestimmte Länge haben muß. Bereits geringe Längenabweichungen führen zu Garnschlupf, Garn­unregelmäßigkeiten oder vorzeitigen Verschleiß. Bei sehr schnellaufenden Riemen, wie sie bei der Texturie­rung eingesetzt werden, kann Vibration entstehen.When processing textile yarns, conveyor belts are used in yarn processing machines to transport and guide the yarn or roving between rollers. It is common to provide a yarn transport path between two parallel transport belts or between a transport belt and a roller. The usual transport belts consist of elastomers or leather, with a reinforcing layer of fiber material, for example cords or threads, usually being embedded in the transport belt. The production of such transport belts requires great care to ensure the required dimensional accuracy. The belt is built up on a mandrel, with the lower elastomer layer being applied first. The reinforcing layer made of fiber material is applied to this lower elastomer layer and this is covered with the upper elastomer layer. In a subsequent heat treatment, the outer elastomer layers bond to one another while embedding the reinforcement layer. If the lower layer is not exactly true to size, a belt sleeve of too large or too small diameter is created. For reasons of space, tensioning devices are often not provided in belt transport devices of textile machines, so that the transport belt must have a precisely defined length. Even slight deviations in length lead to yarn slip, yarn irregularities or premature wear. At very fast running belts, such as those used for texturing, can cause vibration.

Ein weiteres Problem besteht darin, daß der Transport­riemen an derjenigen Riemenseite, die mit dem zu trans­portierenden Garn in Kontakt kommt, eine gewisse Griffigkeit haben muß, während die andere Seite zu­sammen mit denjenigen Komponenten, mit denen sie in Kontakt kommt, einen geringen Reibungskoeffizienten haben sollte. Bei scharfen Umlenkungen des Riemens können keine Umlenkrollen eingesetzt werden, sondern der Riemen muß um die Kante eines Bleches herumlaufen. Dabei entsteht in dem Fall, daß die Innenseite des Riemens mit dem Blech einen hohen Reibungskoeffizienten bildet, ein hoher Transportwiderstand, Abrieb und unter Umständen Schlingenbildung des Riemens, falls eine Spannvorrichtung vorhanden ist.Another problem is that the conveyor belt on the side of the belt that comes into contact with the yarn to be transported must have a certain grip, while the other side, together with the components with which it comes into contact, should have a low coefficient of friction . If the belt is deflected sharply, deflection rollers cannot be used, but the belt must run around the edge of a sheet. In the event that the inside of the belt with the sheet forms a high coefficient of friction, a high transport resistance, abrasion and possibly loop formation of the belt, if a tensioning device is present.

DE-U-1 739 433 beschreibt ein zweischichtig aufgebautes Spinnriemchen. Die Außenschicht dieses Spinnriemchens besteht aus Gummi und die Innenschicht besteht aus einer Gewebelage, deren Zwischenräume mit Gummi oder einem anderen Elastomermaterial ausgefüllt sind. Ein Nachteil dieses Spinnriemchens besteht darin, daß an der Innenfläche sowohl Elastomermaterial als auch Teile der Gewebeschicht vorhanden sind. Die Innenfläche hat daher den hohen Reibungskoeffizienten von Elastomer­material, so daß dann, wenn der Riemen über feste Teile läuft, eine erhebliche Reibung auftritt.DE-U-1 739 433 describes a two-layer spinning belt. The outer layer of this spinning strap is made of rubber and the inner layer consists of a fabric layer, the spaces between which are filled with rubber or another elastomer material. A disadvantage of this spinning strap is that both elastomer material and parts of the fabric layer are present on the inner surface. The inner surface therefore has the high coefficient of friction of elastomeric material, so that when the belt runs over solid parts, considerable friction occurs.

Aus DE 33 41 437 T1 ist ein Riemchen für ein Textil­faserstreckwerk bekannt. Dieses Riemchen wird ein­schichtig durch Extrudieren einer Riemenhülse aus Polymermaterial hergestellt. Die Riemenhülse oder das Riemchen wird anschließend über einen Dorn geblasen, mit Gewebe oder einem anderen Hüllmaterial umwickelt und anschließend erhitzt, wonach die Umwicklung abge­nommen wird. Dann wird das Riemchen von dem Dorn abge­zogen und abgekühlt. Ein derartiges einschichtiges Riemchen besteht ausschließlich aus Elastomermaterial. Seine relativ hohe Elastizität ist im praktischen Ein­satz unerwünscht. Die Reibungs- und Mitnahmeeigenschaf­ten beider Oberflächen sind im wesentlichen gleich.From DE 33 41 437 T1 a strap for a textile fiber drafting system is known. This apron is made in one layer by extruding a belt sleeve made of polymer material. The belt sleeve or that Strappy is then blown over a mandrel, wrapped with tissue or other wrapping material and then heated, after which the wrapping is removed. Then the strap is pulled off the mandrel and cooled. Such a single-layer strap consists exclusively of elastomer material. Its relatively high elasticity is undesirable in practical use. The friction and entrainment properties of both surfaces are essentially the same.

Der Erfindung liegt die Aufgabe zugrunde, einen Trans­portriemen der im Oberbegriff des Patentanspruchs 1 angegebenen Art zu schaffen, der einfach und mit hoher Maßhaltigkeit hergestellt werden kann und der an einer Riemenfläche einen geringeren Reibungskoeffizienten hat als an der anderen Riemenfläche.The invention has for its object to provide a conveyor belt of the type specified in the preamble of claim 1, which can be manufactured easily and with high dimensional accuracy and which has a lower coefficient of friction on one belt surface than on the other belt surface.

Die Lösung dieser Aufgabe erfolgt erfindungsgemäß mit den im kennzeichnenden Teil des Patentanspruchs 1 ange­gebenen Merkmalen.This object is achieved according to the invention with the features specified in the characterizing part of patent claim 1.

Bei dem erfindungsgemäßen Transportriemen besteht die Verstärkungsschicht aus einer vorgereckten und an­schließend geschrumpften Kunststofffolie. Diese Schrumpffolie bildet die Innenfläche des Riemens, so daß die Verstärkungsschicht zwei Funktionen gleich­zeitig erfüllt, nämlich einerseits die Verstärkungs­funktion und andererseits die Bildung einer nicht­griffigen unelastischen glatten Innenfläche mit niedri­gem Reibungskoeffizienten. Für den Riemenaufbau sind grundsätzlich nur zwei Schichtbildungen aus einlagigen Schichten erforderlich. Zunächst wird die Schrumpffolie auf einen Dorn aufgeschrumpft und auf der Schrumpffolie wird die Elastomerschicht angebracht. Das Verbinden beider Schichten geschieht durch Haftvermittler, wobei erforderlichenfalls Wärme eingesetzt werden kann.In the conveyor belt according to the invention, the reinforcement layer consists of a pre-stretched and then shrunk plastic film. This shrink film forms the inner surface of the belt, so that the reinforcing layer fulfills two functions simultaneously, namely on the one hand the reinforcing function and on the other hand the formation of a non-grip, inelastic, smooth inner surface with a low coefficient of friction. In principle, only two layers of single-layer layers are required for the belt structure. First, the shrink film is shrunk onto a mandrel and the elastomer layer is attached to the shrink film. The connecting both layers are done by adhesion promoters, whereby heat can be used if necessary.

Die Riemenhülse bzw. der Riemen erhält durch das radiale Recken und das anschließende Schrumpfen eine Elastizität, die auf ein Minimum beschränkt ist und die erheblich geringer ist als diejenige von Elastomeren. Damit hat der Riemen eine sehr hohe Maßstabilität, die auch während des Betriebes beibehalten wird. Beispiels­weise erlauben die üblichen Faserstreckwerke Toleranzen der Riemenlänge von ± 0,15 mm. Bei dem erfindungsge­mäßen Transportriemen können ohne Schwierigkeiten Tole­ranzen von ± 0,10 mm auch bei längerem Betrieb einge­halten werden. Wegen des geringen Reibungskoeffizienten der Innenseite behält diese Innenseite auch nach langem Betrieb ihre Glätte bei.The radial sleeve and the subsequent shrinking give the belt sleeve or the belt an elasticity which is limited to a minimum and which is considerably less than that of elastomers. The belt thus has a very high level of dimensional stability, which is also maintained during operation. For example, the usual fiber drafting systems allow tolerances for the belt length of ± 0.15 mm. In the case of the transport belt according to the invention, tolerances of ± 0.10 mm can be maintained without difficulty even in the case of prolonged operation. Due to the low coefficient of friction on the inside, this inside remains smooth even after long periods of use.

Die aus der Schrumpffolie bestehende Verstärkungs­schicht, die die Zugbelastung des Treibriemens über­trägt, braucht nur eine geringe Stärke von unter 50 µm zu haben. Die Riemchen können daher mit sehr geringer Riemenstärke hergestellt werden. Die äußere Elastomer­schicht dient dazu, das Fasermaterial zu transportieren und zu strecken.The reinforcement layer consisting of the shrink film, which transmits the tensile load of the drive belt, only needs to have a low thickness of less than 50 µm. The straps can therefore be made with a very small strap thickness. The outer elastomer layer serves to transport and stretch the fiber material.

Die Erfindung betrifft ferner ein Verfahren zur Her­stellung eines Transportriemens, wobei ein radial vor­gereckter Schrumpfschlauch auf einen zylindrischen Dorn aufgeschrumpft wird. Auf den Schrumpfschlauch wird an­schließend eine Elastomerschicht gelegt und beide Schichten werden mittels eines Haftvermittlers bei Temperaturen über 80 °C miteinander verbunden. Nach dem Abkühlen wird der Dorn entfernt. Von der so erhaltenen Riemenhülse werden die einzelnen Riemen abgetrennt.The invention further relates to a method for producing a transport belt, wherein a radially pre-stretched shrink tube is shrunk onto a cylindrical mandrel. An elastomer layer is then placed on the shrink tube and the two layers are bonded together using an adhesive at temperatures above 80 ° C. After cooling, the mandrel is removed. The individual belts are separated from the belt sleeve thus obtained.

Die erhöhte Maßhaltigkeit des erfindungsgemäßen Trans­portriemens ergibt sich daraus, daß der Schrumpf­schlauch auf dem Dorn seine exakten Abmessungen erhält und daß eine Elastomerschicht vorbestimmter Stärke mit dem Schrumpfschlauch verbunden wird. Die Maßungenauig­keiten, die üblicherweise durch die Verwendung einer Elastomer-Innenschicht entstehen, werden vermieden. Eine Verstärkungsschicht aus Fasermaterial erfordert eine Einbettung, da die Faserverstärkungsschicht an der Innenseite des Riemens nicht haften bleibt. Bei dem erfindungsgemäßen Transportriemen, bei dem die Ver­stärkungsschicht aus einer durchgehenden Folie besteht, kann die Verstärkungsschicht eine Innenfläche des Riemens bilden. Die Verwendung von Schrumpffolie er­möglicht nicht nur eine hochgenaue Maßhaltigkeit des Riemens, sondern auch die Erzeugung eines sehr glatten Innenfläche mit niedrigem Reibungskoeffizienten.The increased dimensional stability of the transport belt according to the invention results from the fact that the shrink tube on the mandrel receives its exact dimensions and that an elastomer layer of a predetermined thickness is connected to the shrink tube. The dimensional inaccuracies that usually result from the use of an elastomer inner layer are avoided. A reinforcement layer made of fiber material requires embedding, since the fiber reinforcement layer does not adhere to the inside of the belt. In the case of the conveyor belt according to the invention, in which the reinforcement layer consists of a continuous film, the reinforcement layer can form an inner surface of the belt. The use of shrink film not only enables the belt to be dimensionally accurate, it also creates a very smooth inner surface with a low coefficient of friction.

Obwohl der Transportriemen generell keine Verstärkungs­einlage aus Fasermaterial erfordert, kann zur Erhöhung der Zugfestigkeit eine solche Verstärkungseinlage vor­handen sein. Die Verstärkungseinlage kann an der Grenz­schicht zwischen Schrumpffolie und Elastomerschicht eingebettet sein. Auch im Falle einer Verstärkungs­einlage aus Fasermaterial ergibt sich der Vorteil einer glatten und verschleißfesten Innenfläche des Riemens, die nicht klebrig ist.Although the transport belt generally does not require a reinforcement insert made of fiber material, such a reinforcement insert can be present to increase the tensile strength. The reinforcement insert can be embedded at the boundary layer between the shrink film and the elastomer layer. Even in the case of a reinforcement insert made of fiber material, there is the advantage of a smooth and wear-resistant inner surface of the belt, which is not sticky.

Die Schrumpffolie kann beispielsweise aus einem Poly­amid oder einem Polyester bestehen. Als Elastomermate­rialien können Naturkautschuk oder synthetischer Kaut­schuk sowie thermoplastische Elastomere benutzt werden.The shrink film can for example consist of a polyamide or a polyester. Natural rubber or synthetic rubber and thermoplastic elastomers can be used as elastomer materials.

Im folgenden werden unter Bezugnahme auf die Zeichnun­gen Ausführungsbeispiele der Erfindung näher erläutert.Exemplary embodiments of the invention are explained in more detail below with reference to the drawings.

Es zeigen:

  • Fig. 1 eine perspektivische Darstellung des Transport­riemens,
  • Fig. 2 einen Schnitt entlang der Linie II-II von Fig. 1,
  • Fig. 3 das Verfahren zur Herstellung einer Riemenhülse auf einem Dorn,
  • Fig. 4 einen Querschnitt eines Transportriemens mit zusätzlich eingebetteten Verstärkungsfasern, und
  • Fig. 5 ein Ausführungsbeispiel einer Anwendung des Transportriemens in einem Hochverzugsstreckwerk zum Strecken von Vorgarnen.
Show it:
  • 1 is a perspective view of the conveyor belt,
  • 2 shows a section along the line II-II of FIG. 1,
  • 3 shows the method for producing a belt sleeve on a mandrel,
  • Fig. 4 shows a cross section of a conveyor belt with additional embedded reinforcing fibers, and
  • Fig. 5 shows an embodiment of an application of the conveyor belt in a high drafting device for stretching rovings.

Der in den Fign. 1 und 2 dargestellte Transportriemen besteht aus einem endlosen Band 10 von zweischichtigem Aufbau. Innen befindet sich die Verstärkungsschicht 11 aus einer geschrumpften Schrumpffolie aus Polyamid oder Polyester und außen befindet sich die Elastomerschicht 12. Die beiden Schichten 11 und 12 sind durch ther­mische Vulkanisation, ggf. unter Verwendung eines Haft­vermittlers (Klebers) fest miteinander verbunden. Die Elastomerschicht 12 hat eine wesentlich größere Stärke als die Schrumpffolie 11. In dieser Hinsicht ist die Zeichnung nicht maßstäblich. In Wirklichkeit beträgt die Stärke der Elastomerschicht mindestens etwa das Fünffache der Stärke der Schrumpffolie 11. Die Schrumpffolie hat eine Stärke von weniger als 50 µm. Vorzugsweise beträgt diese Stärke 20 bis 30 µm.The in the Figs. 1 and 2 shown conveyor belt consists of an endless belt 10 of two layers. Inside is the reinforcement layer 11 made of a shrunk shrink film made of polyamide or polyester and on the outside there is the elastomer layer 12. The two layers 11 and 12 are firmly connected to one another by thermal vulcanization, optionally using an adhesive agent (adhesive). The elastomer layer 12 has a much greater thickness than the shrink film 11. In this regard, the drawing is not to scale. In reality, the thickness of the elastomer layer is at least about five times the thickness of the shrink film 11. The shrink film has a thickness of less than 50 μm. This thickness is preferably 20 to 30 μm.

Fig. 3 zeigt den Aufbau einer Riemenhülse auf einem zylindrischen Dorn 13, wobei die Stärke der Schichten 11 und 12 im Verhältnis zum Durchmesser des Dornes 13 und im Verhältnis zueinander ebenfalls nicht maßstäb­lich gezeichnet ist.3 shows the structure of a belt sleeve on a cylindrical mandrel 13, the thickness of the layers 11 and 12 in relation to the diameter of the mandrel 13 and in relation to one another likewise not being drawn to scale.

Zunächst wird auf den Dorn 13 ein radial vorgereckter Schrumpfschlauch aufgezogen, dessen Durchmesser größer ist als derjenige des Dornes 13 und der daher leicht über den Dorn geschoben werden kann. Dann wird der auf dem Dorn 13 sitzende Folienschlauch erwärmt, so daß er schrumpft und sich fest gegen die Außenfläche des Dornes 13 anlegt. Dann wird ein Haftvermittler 14 auf die geschrumpfte Schrumpffolie 11 aufgetragen und an­schliessend wird die Elastomerschicht 12 auf die Schrumpffolie aufgebracht. Die Elastomerschicht kann in Bahnen oder schraubenförmig gewickelten Streifen vor­liegen.First, a radially pre-stretched shrink tube is drawn onto the mandrel 13, the diameter of which is larger than that of the mandrel 13 and which can therefore be easily pushed over the mandrel. Then the film tube sitting on the mandrel 13 is heated so that it shrinks and lies firmly against the outer surface of the mandrel 13. An adhesion promoter 14 is then applied to the shrunk shrink film 11 and then the elastomer layer 12 is applied to the shrink film. The elastomer layer can be in sheets or helically wound strips.

Der auf dem Dorn 13 sitzende Schichtaufbau wird bei etwa 150 °C vulkanisiert, wobei sich die Schrumpffolie mit der darüber angeordneten Elastomerschicht 12 fest verbindet. Nach erfolgter Vulkanisation erfolgt eine Abkühlung. Die Schrumpffolie wird beim Herunterkühlen bei etwa 80 °C fixiert, so daß sie ihre Form dann nicht mehr ändert und auc nicht elastisch ist. Der Durch­messer des aus Metall bestehenden Dornes 13 verringert sich jedoch auch unterhalb von 80 °C noch weiter, so daß die Riemenhülse im kalten Zustand leicht von dem Dorn 13 abgezogen werden kann. Die Riemenhülse wird dann anschließend in einzelne Transportriemen 10 zer­schnitten. Die Wandstärke des Transportriemens beträgt etwa 1 mm.The layer structure seated on the mandrel 13 is vulcanized at approximately 150 ° C., the shrink film firmly connecting to the elastomer layer 12 arranged above it. After vulcanization, cooling takes place. The shrink film is fixed when it cools down at about 80 ° C so that it then no longer changes its shape and is also not elastic. However, the diameter of the metal mandrel 13 is reduced even further below 80 ° C., so that the belt sleeve can easily be pulled off the mandrel 13 in the cold state. The belt sleeve is then cut into individual transport belts 10. The wall thickness of the conveyor belt is approximately 1 mm.

Das Ausführungsbeispiel von Fig. 4 unterscheidet sich von dem ersten Ausführungsbeispiel nur dadurch, daß zwischen der Schrumpffolie 11 und der Elastomerschicht 12 eine zusätzliche Verstärkungseinlage 23 aus Faser­material eingebettet ist. Hierbei kann es sich um schraubenförmig gewickelte Einzelfäden, um Fasermatten, Gewebe o.dgl. handeln.The embodiment of FIG. 4 differs from the first embodiment only in that an additional reinforcement insert 23 made of fiber material is embedded between the shrink film 11 and the elastomer layer 12. This can be helically wound individual threads, fiber mats, fabrics or the like. act.

Fig. 5 zeigt ein Ausführungsbeispiel für die Anwendung der Transportriemen 10 in einem Hochverzugsstreckwerk zum Strecken von Vorgarn 15, das einer Spinnmaschine oder Vorspinnmaschine zugeführt wird. Das Vorgarn 15, das eine relativ große Faserdicke hat, wird zwischen zwei Walzenpaaren 16 und 17 gestreckt, wobei das strom­ab angeordnete Walzenpaar 17 eine größere Umfangsge­schwindigkeit hat als das stromauf angeordnete Walzen­paar 16. Zwischen den Walzenpaaren 16 und 17 wird das Vorgarn 15 zwischen zwei Führungseinrichtungen 18,19 geführt. Jede der Führungseinrichtungen weist eine Riemenrolle 20 auf, um die der Transportriemen 10 um­läuft. An dem dem Walzenpaar 17 zugewandten Ende müssen die Transportriemen 10 möglichst nahe an den Walzen­spalt herangeführt werden. Daher sind an diesem Ende keine Umlenkrollen vorhanden sondern Führungsbleche 21, an deren Kanten die Riemen 10 umgelenkt werden. Ferner sind Riemenspannvorrichtungen in Form von Blattfedern 22 vorhanden.Fig. 5 shows an embodiment for the use of the conveyor belt 10 in a high drafting device for stretching roving 15, which is fed to a spinning machine or roving machine. The roving 15, which has a relatively large fiber thickness, is stretched between two roller pairs 16 and 17, the downstream roller pair 17 having a greater peripheral speed than the upstream roller pair 16. Between the roller pairs 16 and 17, the roving 15 is between two guide devices 18.19 led. Each of the guide devices has a belt roller 20 around which the transport belt 10 rotates. At the end facing the pair of rollers 17, the conveyor belts 10 must be brought as close as possible to the roller gap. Therefore, there are no deflection rollers at this end, but guide plates 21, at the edges of which the belts 10 are deflected. There are also belt tensioners in the form of leaf springs 22.

Die Riemen 10 haben die Schrumpffolie 11 an ihrer Innenseite, so daß die Umlenkbleche 21 mit der glatten unelastischen Schrumpffolie 11 in Kontakt kommen, während das Vorgarn 15 mit der außenliegenden griffigen Elastomerschicht 12 in Kontakt kommt.The belts 10 have the shrink film 11 on their inside, so that the deflection plates 21 come into contact with the smooth, inelastic shrink film 11, while the roving 15 comes into contact with the non-slip elastomer layer 12 on the outside.

Claims (4)

1. Transportriemen für Garne, mit einer Elastomer­schicht (12) und mindestens einer die Innenfläche des Riemens bildenden Verstärkungsschicht,
dadurch gekennzeichnet,
daß die Verstärkungsschicht aus einer vorgereckten und anschließend geschrumpften thermoplastischen Schrumpffolie (11) besteht.1. Transport belt for yarn, with an elastomer layer (12) and at least one reinforcing layer forming the inner surface of the belt,
characterized,
that the reinforcing layer consists of a pre-stretched and then shrunk thermoplastic shrink film (11). 2. Transportriemen nach Anspruch 1, dadurch gekenn­zeichnet, daß im Grenzbereich zwischen der Ela­stomerschicht (12) und der Schrumpffolie (11) eine zweite Verstärkungsschicht (23) aus Fasermaterial eingebettet ist.2. Transport belt according to claim 1, characterized in that a second reinforcing layer (23) made of fiber material is embedded in the boundary region between the elastomer layer (12) and the shrink film (11). 3. Transportriemen nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Schrumpffolie (11) mit der Elastomerschicht (12) durch Haftvermittler ver­bunden ist.3. Transport belt according to claim 1 or 2, characterized in that the shrink film (11) with the elastomer layer (12) is connected by adhesion promoters. 4. Verfahren zur Herstellung eines Transportriemens nach einem der Ansprüche 1 bis 3, dadurch gekenn­zeichnet, daß ein radial vorgereckter Schrumpf­schlauch auf einen zylindrischen Dorn (13) aufge­schrumpft wird, daß über den Schrumpfschlauch eine Elastomerschicht (12) gelegt wird, daß beide Schichten bei Temperaturen über 80 °C miteinander verbunden werden und daß nach dem Abkühlen der Dorn (13) entfernt wird.4. A method for producing a conveyor belt according to one of claims 1 to 3, characterized in that a radially pre-stretched shrink tube is shrunk onto a cylindrical mandrel (13), that an elastomer layer (12) is placed over the shrink tube that both layers at temperatures above 80 ° C and that the mandrel (13) is removed after cooling.
EP90109908A 1989-07-08 1990-05-24 Transport aprons for yarns Withdrawn EP0407715A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3922507 1989-07-08
DE19893922507 DE3922507A1 (en) 1989-07-08 1989-07-08 TRANSPORTION BELTS FOR YARNS

Publications (1)

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EP0407715A1 true EP0407715A1 (en) 1991-01-16

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ID=6384572

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EP90109908A Withdrawn EP0407715A1 (en) 1989-07-08 1990-05-24 Transport aprons for yarns

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EP (1) EP0407715A1 (en)
JP (1) JPH03220326A (en)
DD (1) DD296317A5 (en)
DE (1) DE3922507A1 (en)
TR (1) TR24745A (en)

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EP1350871A2 (en) * 2002-03-28 2003-10-08 Rieter Ingolstadt Spinnereimaschinenbau AG Drawing frame for a spinning machine comprising supporting means for fibre supporting aprons
WO2008000451A1 (en) * 2006-06-28 2008-01-03 Oerlikon Textile Gmbh & Co. Kg Drafting apron for fibre drafting systems
ES2303429A1 (en) * 2005-02-22 2008-08-01 Maschinenfabrik Rieter Ag Staple fiber tow stretching tool, e.g. for ring spinning frame, has upper belt with structured upper surface and freely sliding lower surface to improve drive uptake
DE19837183B4 (en) * 1998-08-17 2009-06-04 Spindelfabrik Suessen Gmbh Endless conveyor belt for transporting a stretched fiber structure
US7681710B2 (en) 2008-04-10 2010-03-23 Fki Logistex, Inc. Modular conveyer transfer systems and methods
CN103469388A (en) * 2013-09-13 2013-12-25 常熟市建华织造有限责任公司 Novel rolla leather ring
CN103469387A (en) * 2013-09-13 2013-12-25 常熟市建华织造有限责任公司 Production method of novel rolla leather ring
CN104073931A (en) * 2014-06-12 2014-10-01 吴江久美微纤织造有限公司 Spinning apron
CN104975387A (en) * 2015-07-07 2015-10-14 苏州东茂纺织实业有限公司 Split type spinning leather ring
CN107338520A (en) * 2017-06-28 2017-11-10 谭威 A kind of textile leather collar
WO2021136770A1 (en) 2019-12-31 2021-07-08 Maschinenfabrik Rieter Ag Drafting device of a textile machine, the textile machine and a movable sliding element of the textile machine and a method for reducing friction between a drafting apron of a fibre strand and at least one stationary component of the drafting device of the fibre strand on the textile machine

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DE102007001585B4 (en) * 2006-12-11 2020-02-13 Reinhard König Drafting system for refining fiber material and a suitable strap
JP5545951B2 (en) * 2009-12-26 2014-07-09 ヤマウチ株式会社 Apron band for spinning
CN102995181B (en) * 2012-10-31 2016-02-17 江苏高博智融科技有限公司 A kind of textile leather collar

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GB2035393A (en) * 1978-11-29 1980-06-18 Dayco Corp Textile apron

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19837183B4 (en) * 1998-08-17 2009-06-04 Spindelfabrik Suessen Gmbh Endless conveyor belt for transporting a stretched fiber structure
DE19837183C5 (en) * 1998-08-17 2010-12-30 Spindelfabrik Suessen Gmbh Endless conveyor belt for transporting a stretched fiber structure
EP1350871A2 (en) * 2002-03-28 2003-10-08 Rieter Ingolstadt Spinnereimaschinenbau AG Drawing frame for a spinning machine comprising supporting means for fibre supporting aprons
EP1350871A3 (en) * 2002-03-28 2005-04-13 Rieter Ingolstadt Spinnereimaschinenbau AG Drawing frame for a spinning machine comprising supporting means for fibre supporting aprons
ES2303429A1 (en) * 2005-02-22 2008-08-01 Maschinenfabrik Rieter Ag Staple fiber tow stretching tool, e.g. for ring spinning frame, has upper belt with structured upper surface and freely sliding lower surface to improve drive uptake
WO2008000451A1 (en) * 2006-06-28 2008-01-03 Oerlikon Textile Gmbh & Co. Kg Drafting apron for fibre drafting systems
US7681710B2 (en) 2008-04-10 2010-03-23 Fki Logistex, Inc. Modular conveyer transfer systems and methods
CN103469387A (en) * 2013-09-13 2013-12-25 常熟市建华织造有限责任公司 Production method of novel rolla leather ring
CN103469388A (en) * 2013-09-13 2013-12-25 常熟市建华织造有限责任公司 Novel rolla leather ring
CN103469387B (en) * 2013-09-13 2015-10-14 顾祥茂 A kind of preparation method of roller apron
CN103469388B (en) * 2013-09-13 2015-11-04 常熟市建华织造有限责任公司 A kind of roller apron
CN104073931A (en) * 2014-06-12 2014-10-01 吴江久美微纤织造有限公司 Spinning apron
CN104975387A (en) * 2015-07-07 2015-10-14 苏州东茂纺织实业有限公司 Split type spinning leather ring
CN107338520A (en) * 2017-06-28 2017-11-10 谭威 A kind of textile leather collar
CN107338520B (en) * 2017-06-28 2019-10-29 安徽省伊贝雅纺织有限公司 A kind of textile leather collar
WO2021136770A1 (en) 2019-12-31 2021-07-08 Maschinenfabrik Rieter Ag Drafting device of a textile machine, the textile machine and a movable sliding element of the textile machine and a method for reducing friction between a drafting apron of a fibre strand and at least one stationary component of the drafting device of the fibre strand on the textile machine

Also Published As

Publication number Publication date
JPH03220326A (en) 1991-09-27
DD296317A5 (en) 1991-11-28
TR24745A (en) 1992-03-01
DE3922507A1 (en) 1991-01-17

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