EP3631059B1 - Drum for a carding machine - Google Patents

Drum for a carding machine Download PDF

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Publication number
EP3631059B1
EP3631059B1 EP18729205.7A EP18729205A EP3631059B1 EP 3631059 B1 EP3631059 B1 EP 3631059B1 EP 18729205 A EP18729205 A EP 18729205A EP 3631059 B1 EP3631059 B1 EP 3631059B1
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EP
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Prior art keywords
drum
wall thickness
spokes
carding machine
area
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EP18729205.7A
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German (de)
French (fr)
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EP3631059A1 (en
Inventor
Emil Medvetchi
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01GPRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02Carding machines
    • D01G15/12Details
    • D01G15/14Constructional features of carding elements, e.g. for facilitating attachment of card clothing
    • D01G15/16Main cylinders; Breasts

Definitions

  • the invention relates to a drum for a card with a thick, cylindrical drum shell, which is connected in the interior to at least two spokes running in the radial direction, which are arranged at a distance from one another as seen in the axial direction of the drum.
  • the carding gap set in the idle state can change in the operating state, which can lead to carding deterioration due to loss of carding surface as well as collisions of the clothings and thus damage to the clothings.
  • the drum of the card consists at least partially of steel or aluminum, which is covered with a bandage of carbon fiber reinforced plastic.
  • this is intended to influence the thermal expansion and, on the other hand, to reduce the mass with regard to the centrifugal forces that occur.
  • This embodiment is also relatively complex and expensive to manufacture.
  • the EP 0 214 438 A2 discloses an embodiment of a drum for a card which is internally divided into cells by radial support elements connected to the mantle of the drum.
  • the SU 874 778 A1 discloses a reduced wall thickness of the drum shell in the area of the spokes, but ribs are provided inside the drum to which the spokes are attached. Additional rib-like reinforcements are provided between the spokes in the inner area of the drum casing.
  • the GB 762 453 A discloses the attempt to reduce the deformation of the drum shell by a costly reinforcement of the width of at least one of the spokes.
  • the U.S. 5,920,961A discloses a drum which is internally provided with longitudinal ribs in the direction of the drum axis.
  • a disadvantage of these known designs of drums of the card is that an improvement in the dimensional stability or dimensional stability of the drum can only be achieved at the expense of high material costs or a complex construction.
  • a drum for a card is proposed with a thick, cylindrical drum shell, which is connected in the interior with at least two spokes running in the radial direction, which are arranged at a distance from one another as seen in the axial direction of the drum, the Wall thickness of the drum shell in the area of the connection to the respective spoke is greater than the wall thickness outside of this connection area, and the wall thickness of the drum shell - viewed in the axial direction of the drum - at least in the area between the spokes - starting from the connection area of the respective spoke - continuously reduced to a minimum wall thickness, the reduction in the wall thickness of the drum shell being continuous or curved.
  • the wall thickness is reduced at an angle of 0.5 to 2.0 degrees, preferably 1.2 degrees.
  • the strength of the drum wall is also increased in the area between the spokes, which means that the drum wall is not deformed due to the centrifugal forces that occur in it Area is selectively distributed to allow an even centrifugal expansion.
  • the curve be made dependent on the local stresses, the shape of this curve containing a constant value of the stresses caused by the centrifugal force.
  • the shape of this curve containing a constant value of the stresses caused by the centrifugal force.
  • the greater dimension (d1) of the wall thickness of the drum shell in the connection area with the respective spoke is between 5.0 and 25.0 mm.
  • the minimum wall thickness (d2) of the drum casing (M) is between 2.0 and 15.0 mm.
  • the wall thicknesses of the drum are thus dimensioned sufficiently to enable high speeds of the card drum without irregularities occurring in the carding gap due to increased centrifugal forces.
  • the minimum wall thickness is preferably 12.5 mm and the wall thickness in the connection area is 22.5 mm.
  • FIG. 1 shows a card 1 with a feed chute 2, via which the fibrous material is fed to a feed roller 3 in the form of a fiber web.
  • the fiber material is delivered from the feed roller 3 to a licker-in 4, which transfers the fiber material to a carding drum 5 (called “drum” for short) of the card 1.
  • the fiber material entrained by the drum 5 reaches the area of a main carding zone 7, which is formed in cooperation with a revolving flat unit 6 arranged circumferentially above the drum 5, as a result of the rotary movement of the drum 5 about its axis (shaft W), represented by an arrow.
  • the direction of rotation of the revolving flat unit 6 is indicated by an arrow.
  • the revolving flat unit 6 is provided with circulating flat rods D, shown schematically, which are equipped with clothings, not shown.
  • the carded fiber material reaches the area of a rotatably mounted doffer 8, which removes the material removed from the drum 5 Fibrous material is transferred to a rotatably mounted doffing roller 9 .
  • the doffer roller 9 conveys the fibrous material removed from the doffer 8 via guide devices (not shown) to a downstream pair of press rollers 10, which delivers the fibrous material to a fleece funnel 11 via additional guide means (e.g. a cross conveyor belt) that are not shown.
  • the fiber material formed in the fleece funnel 11 (in the form of a sliver) is calendered by a subsequent pair of calender rollers 12 and transferred to a sliver coiler (not shown).
  • Fig.2 is a sectional view AA of the drum 5 Fig.1 shown.
  • the drum 5 is equipped on its outer peripheral surface U1 with a set G, which in the Fig.2 is indicated schematically.
  • the drum 5 is rotatably mounted in a machine frame of the card via a shaft W and via the bearings L1, L2.
  • the shaft W is connected to a card drive, which is not shown in detail.
  • the already known drum 5 shown here has a cylindrical drum shell M with a constant wall thickness a.
  • the drum jacket M is supported in its interior IR by spokes S1, S2 (also called drum base) arranged at an axial distance b from one another on the shaft W and is connected to it in a rotationally fixed manner.
  • the spokes S1, S2 are attached to the inner peripheral surface U2 of the drum shell M in a peripheral connection area V1, or V2.
  • the attachment can be done by welds (schematically indicated), by a press fit or in some other way. It is also possible to form the spokes S1, S2 in one piece with the drum casing (eg by a casting process).
  • Fig.3 the longitudinal section of a drum 5 is shown, which shows an exemplary embodiment of a drum casing M designed according to the invention with spokes S3, S4 arranged in its interior IR.
  • the drum jacket M has a wall thickness d1 in the area of the connection areas V1, V2 with the respective spokes S3, S4. Starting from the respective connection area V1, V2--seen in the axial direction of the drum 5--the wall thickness of the drum jacket M on both sides of the connection areas V1, V2 is continuously reduced down to a minimum wall thickness d2.
  • the inner peripheral surface U2 runs at an angle c1 or c2, starting from the inner surface IF of the respective connection area V1, V2.
  • the angles c1 and c2 can be different or have the same value.
  • a section T of the drum casing M with a length s is provided with a constant wall thickness d2.
  • spokes S3, S4 are arranged at an axial distance b from one another and are supported on a shaft W, to which they are connected in a rotationally fixed manner.
  • the shaft W is rotatably mounted in a machine frame via the bearings L1, L2 and is connected to a drive (not shown).
  • the enlarged view of the Fig.4 shows a section of the drum Fig.3 ,
  • the reduction in wall thickness d1 in the respective connection region V1 runs in the form of a curve P down to a minimum wall thickness d2.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Description

Die Erfindung bezieht sich auf eine Trommel für eine Karde mit einem, eine Wandstärke aufweisenden, zylindrischen Trommelmantel, welcher im Innenraum mit wenigstens zwei, in radialer Richtung verlaufenden Speichen verbunden ist, welche in axialer Richtung der Trommel gesehen, in einem Abstand zueinander angeordnet sind.The invention relates to a drum for a card with a thick, cylindrical drum shell, which is connected in the interior to at least two spokes running in the radial direction, which are arranged at a distance from one another as seen in the axial direction of the drum.

Um bei einer Karde ein möglichst effiziente Kardierwirkung zu erzielen, ist es notwendig den Kardierspalt insbesondere in der Hauptkardierzone zwischen der Garnitur des Deckels und der Garnitur der Kardentrommel (auch Tambour genannt) möglichst klein zu halten. Die Garnitur der Kardentrommel wird durch spezielle Aufziehverfahren und Befestigungsverfahren auf dem Aussenumfang der Trommel der Karde aufgebracht.In order to achieve the most efficient carding effect possible with a card, it is necessary to keep the carding gap as small as possible, particularly in the main carding zone between the clothing of the flat and the clothing of the card drum (also called tambour). The clothing of the card drum is attached to the outer circumference of the card drum by special mounting and fastening methods.

Zur Erzielung von hohen Produktionsmengen wurden die Drehzahlen der Kardentrommeln in den letzten Jahren immer mehr erhöht. D.h. inzwischen werden Kardentrommeln mit Drehzahlen von über 600 U/min eingesetzt.In order to achieve high production quantities, the speeds of the card drums have been increased more and more in recent years. This means that card drums with speeds of over 600 rpm are now being used.

Durch die Erhöhung der Drehzahlen werden die Zentrifugalkräfte an der Trommel der Karde (Kardiertrommel) erhöht, welche ungleichmässige elastische Verformungen im Durchmesserbereich der Trommel der Karde herbeiführen bedingt durch die auftretenden ungleichmässigen Spannungen.By increasing the speed, the centrifugal forces on the drum of the card (carding drum) are increased, which bring about uneven elastic deformations in the diameter area of the drum of the card due to the uneven tensions that occur.

Durch die auftretenden beschriebenen ungleichmässigen elastischen Verformungen im Trommelbereich kann sich der im Ruhezustand eingestellte Kardierspalt im Betriebszustand verändern was zu Verschlechterungen der Kardierung durch Verlust an Kardierfläche wie auch zu Kollisionen der Garnituren und somit zu Beschädigungen der Garnituren führen kann.Due to the described non-uniform elastic deformations occurring in the drum area, the carding gap set in the idle state can change in the operating state, which can lead to carding deterioration due to loss of carding surface as well as collisions of the clothings and thus damage to the clothings.

Um dem entgegenzuwirken wurden in der Patentliteratur bereits schon verschiedene Lösungen vorgeschlagen. In der EP 0 446 006 A1 wird dabei die Verwendung einer Trommel für eine Karde vorgeschlagen, welche sich aus einer Vielzahl von Profilen in Leichtbauweise zusammensetzt. Mit dieser Ausführung kann unter Umständen die Masse der Trommel und somit die auftretenden Zentrifugalkräfte herabgesetzt werden.To counteract this, various solutions have already been proposed in the patent literature. In the EP 0 446 006 A1 the use of a drum for a card is proposed, which consists of a large number of lightweight profiles. With this design, the mass of the drum and thus the centrifugal forces that occur can be reduced under certain circumstances.

Sie ist jedoch sehr aufwändig und teuer und erfordert ebenfalls eine zeitintensive Montagearbeit.However, it is very complex and expensive and also requires time-consuming assembly work.

Des Weiteren wird in der DE 10 2004 035 771 A1 eine Ausführung vorgeschlagen, wobei die Trommel der Karde mindestens teilweise aus Stahl oder aus Aluminium besteht, welche mit einer Bandage aus Kohlefaserverstärktem Kunststoff ummantelt ist. Damit soll einerseits Einfluss auf die Wärmeausdehnung genommen werden und andererseits die Masse hinsichtlich der auftretenden Zentrifugalkräfte verringert werden. Auch diese Ausführung ist relativ aufwändig und teuer in der Herstellung.Furthermore, in the DE 10 2004 035 771 A1 an embodiment is proposed, wherein the drum of the card consists at least partially of steel or aluminum, which is covered with a bandage of carbon fiber reinforced plastic. On the one hand, this is intended to influence the thermal expansion and, on the other hand, to reduce the mass with regard to the centrifugal forces that occur. This embodiment is also relatively complex and expensive to manufacture.

Die EP 0 214 438 A2 offenbart eine Ausführung einer Trommel für eine Karde, welche in ihrem Inneren durch radiale, mit dem Mantel der Trommel verbundene Abstützelemente in Zellen unterteilt ist. Die SU 874 778 A1 offenbart eine verringerte Wandstärke des Trommelmantels im Bereich der Speichen, jedoch sind im Inneren der Trommel Rippen vorgesehen an welchen die Speichen befestigt sind. Zwischen den Speichen sind weitere rippenartige Verstärkungen im Inneren Bereich des Trommelmantels vorgesehen. Die GB 762 453 A offenbart den Versuch durch eine aufwändige Verstärkung der Breite mindestens einer der Speichen die Deformierung des Trommelmantels zu verringern. Die US 5 920 961 A offenbart eine Trommel welche im Inneren mit Längsrippen in Richtung der Trommelachse versehen ist. Nachteilig an diesen bekannten Ausführungen von Trommeln der Karde ist, dass eine Verbesserung der Formhaltigkeit respektive der Formbeständigkeit der Trommel jeweils nur auf Kosten eines hohen Materialaufwandes oder einer aufwändigen Konstruktion erreicht werden kann.the EP 0 214 438 A2 discloses an embodiment of a drum for a card which is internally divided into cells by radial support elements connected to the mantle of the drum. the SU 874 778 A1 discloses a reduced wall thickness of the drum shell in the area of the spokes, but ribs are provided inside the drum to which the spokes are attached. Additional rib-like reinforcements are provided between the spokes in the inner area of the drum casing. the GB 762 453 A discloses the attempt to reduce the deformation of the drum shell by a costly reinforcement of the width of at least one of the spokes. the U.S. 5,920,961A discloses a drum which is internally provided with longitudinal ribs in the direction of the drum axis. A disadvantage of these known designs of drums of the card is that an improvement in the dimensional stability or dimensional stability of the drum can only be achieved at the expense of high material costs or a complex construction.

Es ist somit Aufgabe der Erfindung eine Vorrichtung vorzuschlagen, welche die Nachteile des bekannten Standes der Technik beseitigt und auch grössere Trommeldrehzahlen bei der Karde ermöglicht ohne dass es zu unerwünschten ungleichmässigen Verformungen im Bereich des Trommelumfanges der Kardentrommel kommt.It is therefore the object of the invention to propose a device which eliminates the disadvantages of the known prior art and also enables higher drum speeds for the card without undesired uneven deformations occurring in the region of the drum circumference of the card drum.

Die Aufgabe wird gelöst durch eine Trommel mit den Merkmalen des unabhängigen Anspruchs. Dabei wird eine Trommel für eine Karde vorgeschlagen mit einem, eine Wandstärke aufweisenden, zylindrischen Trommelmantel, welcher im Innenraum mit wenigstens zwei, in radialer Richtung verlaufenden Speichen verbunden ist, welche in axialer Richtung der Trommel gesehen, in einem Abstand zueinander angeordnet sind, wobei die Wandstärke des Trommelmantels im Bereich der Verbindung zur jeweiligen Speiche ein grösseres Mass aufweist als die Wandstärke ausserhalb dieses Verbindungsbereiches, und wobei sich die Wandstärke des Trommelmantels - in axialer Richtung der Trommel gesehen - wenigstens im Bereich zwischen den Speichen - ausgehend vom Verbindungsbereich der jeweiligen Speiche - kontinuierlich bis auf eine Mindestwandstärke verringert, wobei die Verringerung der Wandstärke des Trommelmantels kontinuierlich oder kurvenförmig verläuft.The object is solved by a drum having the features of the independent claim. A drum for a card is proposed with a thick, cylindrical drum shell, which is connected in the interior with at least two spokes running in the radial direction, which are arranged at a distance from one another as seen in the axial direction of the drum, the Wall thickness of the drum shell in the area of the connection to the respective spoke is greater than the wall thickness outside of this connection area, and the wall thickness of the drum shell - viewed in the axial direction of the drum - at least in the area between the spokes - starting from the connection area of the respective spoke - continuously reduced to a minimum wall thickness, the reduction in the wall thickness of the drum shell being continuous or curved.

Dadurch wird die zentrifugale Ausdehnung über den gesamten Längsschnitt ausgeglichen. Die Verringerung der Wandstärke verläuft dabei in einem Winkel von 0.5 bis 2.0 Winkelgraden, bevorzugterweise 1.2 Winkelgraden.This compensates for the centrifugal expansion over the entire longitudinal section. The wall thickness is reduced at an angle of 0.5 to 2.0 degrees, preferably 1.2 degrees.

Damit wird durch eine einfache und kostengünstige Ausführung erreicht, dass die Festigkeit der Trommelwandung auch im Bereich zwischen den Speichen erhöht wird, womit eine Verformung der Trommelwand aufgrund der auftretenden Fliehkräfte in diesem Bereich gezielt verteilt wird, um eine gleichmässige zentrifugale Ausdehnung zu ermöglichen.With a simple and inexpensive design, the strength of the drum wall is also increased in the area between the spokes, which means that the drum wall is not deformed due to the centrifugal forces that occur in it Area is selectively distributed to allow an even centrifugal expansion.

Es wird vorteilhafterweise vorgeschlagen den kurvenförmigen Verlauf von den örtlichen Spannungen abhängig zu gestalten wobei der Verlauf dieser Kurve einen konstanten Wert der von den durch die Zentrifugalkraft verursachten Spannungen beinhaltet. In vereinfachter Form kann dabei von einer parabelförmigen Kurve gesprochen werden.Advantageously, it is proposed that the curve be made dependent on the local stresses, the shape of this curve containing a constant value of the stresses caused by the centrifugal force. In simplified form, one can speak of a parabolic curve.

Es wird weiter vorgeschlagen, dass das grössere Mass (d1) der Wandstärke des Trommelmantels im Verbindungsbereich mit der jeweiligen Speiche zwischen 5.0 und 25.0 mm beträgt. Vorteilhafter Weise wird weiter vorgeschlagen, dass die Mindestwandstärke (d2) des Trommelmantels (M) zwischen 2.0 und 15.0 mm beträgt. Damit sind die Wandstärken der Trommel ausreichend dimensioniert, um auch hohe Drehzahlen der Kardentrommel zu ermöglichen, ohne dass es zu Unregelmässigkeiten im Kardierspalt hinsichtlich erhöhter Zentrifugalkräfte kommt. Bei einem Trommeldurchmesser von über 1.0 m und einer axialen Länge von über 1.0 m ist die Mindestwandstärke bevorzugterweise 12.5 mm und die Wandstärke im Verbindungsbereich 22.5 mm.It is further proposed that the greater dimension (d1) of the wall thickness of the drum shell in the connection area with the respective spoke is between 5.0 and 25.0 mm. Advantageously, it is further proposed that the minimum wall thickness (d2) of the drum casing (M) is between 2.0 and 15.0 mm. The wall thicknesses of the drum are thus dimensioned sufficiently to enable high speeds of the card drum without irregularities occurring in the carding gap due to increased centrifugal forces. With a drum diameter of more than 1.0 m and an axial length of more than 1.0 m, the minimum wall thickness is preferably 12.5 mm and the wall thickness in the connection area is 22.5 mm.

Als weitere Ausführung der Erfindung wird vorgeschlagen, dass - in axialer Richtung der Trommel gesehen - sich zwischen den Speichen wenigstens ein Teilabschnitt des Trommelmantels die Mindestwandstärke aufweist, wobei die Länge des Teilabschnittes zwischen 5 und 80 % des Abstandes zwischen dem Verbindungsbereich zweier benachbarter Speichen beträgt. Zur Erzielung einer kompakten und stabilen Bauweise der Trommel wird weiter vorgeschlagen, dass - in axialer Richtung der Trommel gesehen - der Abstand zwischen dem Verbindungsbereich zweier benachbarter Speichen zwischen 400 und 1300 mm beträgt.As a further embodiment of the invention, it is proposed that - seen in the axial direction of the drum - at least one section of the drum shell has the minimum wall thickness between the spokes, with the length of the section between 5 and 80% of the distance between the connecting area of two adjacent spokes is. To achieve a compact and stable construction of the drum, it is further proposed that—seen in the axial direction of the drum—the distance between the connecting area of two adjacent spokes is between 400 and 1300 mm.

Es wird die Verwendung der erfindungsgemässen Trommel in einer Karde vorgeschlagen.The use of the drum according to the invention in a card is proposed.

Weitere Vorteile der Erfindung werden anhand nachfolgender Ausführungsbeispiele näher aufgezeigt und beschrieben:

Fig.1
eine schematische Seitenansicht einer Karde
Fig.2
eine schematische Schnittdarstellung A-A einer bekannten Kardiertrommel nach Fig.1
Fig. 3
eine schematische Schnittdarstellung einer Kardiertrommel nach Fig.2 mit einer erfindungsgemäss ausgebildeten Ausführung
Fig.4
eine weitere erfindungsgemässe Ausführung der Kardiertrommel nach Fig.3 in einer vergrösserten Teilansicht
Further advantages of the invention are shown and described in more detail using the following exemplary embodiments:
Fig.1
a schematic side view of a card
Fig.2
a schematic sectional view AA of a known carding drum Fig.1
3
a schematic sectional view of a carding drum Fig.2 with an embodiment designed according to the invention
Fig.4
another embodiment of the carding drum according to the invention Fig.3 in an enlarged partial view

Fig. 1 zeigt eine Karde 1 mit einem Zuführschacht 2, über welchen das Fasergut in Form eines Faservlieses einer Speisewalze 3 zugeführt wird. Von der Speisewalze 3 wird das Fasergut auf einen Vorreisser 4 abgegeben, welcher das Fasergut an eine Kardiertrommel 5 (kurz "Trommel" genannt) der Karde 1 übergibt. Das von der Trommel 5 mitgenommene Fasergut gelangt durch die mit einem Pfeil dargestellte Drehbewegung der Trommel 5 um ihre Achse (Welle W) in den Bereich einer Hauptkardierzone 7, welche im Zusammenwirken mit einem oberhalb der Trommel 5 umlaufend angeordneten Wanderdeckelaggregat 6 gebildet wird. Die Drehrichtung des Wanderdeckelaggregates 6 ist mit einem Pfeil angedeutet. Das Wanderdeckelaggregat 6 ist mit schematisch gezeigten, umlaufenden Deckelstäben D versehen, die mit nicht gezeigten Garnituren bestückt sind. 1 shows a card 1 with a feed chute 2, via which the fibrous material is fed to a feed roller 3 in the form of a fiber web. The fiber material is delivered from the feed roller 3 to a licker-in 4, which transfers the fiber material to a carding drum 5 (called "drum" for short) of the card 1. The fiber material entrained by the drum 5 reaches the area of a main carding zone 7, which is formed in cooperation with a revolving flat unit 6 arranged circumferentially above the drum 5, as a result of the rotary movement of the drum 5 about its axis (shaft W), represented by an arrow. The direction of rotation of the revolving flat unit 6 is indicated by an arrow. The revolving flat unit 6 is provided with circulating flat rods D, shown schematically, which are equipped with clothings, not shown.

Im Anschluss an die Hauptkardierzone 7 gelangt das kardierte Fasergut in den Bereich eines drehbar gelagerten Abnehmers 8, welcher das von der Trommel 5 abgenommene Fasergut an eine drehbar gelagerte Abnehmerwalze 9 überführt. Die Abnehmerwalze 9 fördert das, von dem Abnehmer 8 abgenommene Fasergut über nicht näher gezeigte Führungseinrichtungen an ein nachfolgendes Presswalzenpaar 10, welches das Fasergut an einen Vliestrichter 11 über weitere, nicht gezeigte Führungsmittel (z. B. ein Querförderband) abgibt. Das im Vliestrichter 11 gebildete Fasergut (in Form eines Faserbandes) wird durch ein nachfolgendes Kalanderwalzenpaar 12 kalandriert und an eine nicht gezeigte Bandablage überführt.Following the main carding zone 7, the carded fiber material reaches the area of a rotatably mounted doffer 8, which removes the material removed from the drum 5 Fibrous material is transferred to a rotatably mounted doffing roller 9 . The doffer roller 9 conveys the fibrous material removed from the doffer 8 via guide devices (not shown) to a downstream pair of press rollers 10, which delivers the fibrous material to a fleece funnel 11 via additional guide means (e.g. a cross conveyor belt) that are not shown. The fiber material formed in the fleece funnel 11 (in the form of a sliver) is calendered by a subsequent pair of calender rollers 12 and transferred to a sliver coiler (not shown).

In Fig.2 wird eine Schnittdarstellung A-A der Trommel 5 nach Fig.1 gezeigt. Die Trommel 5 ist auf ihrer äusseren Umfangsfläche U1 mit einer Garnitur G bestückt, welche in der Fig.2 schematisch angedeutet wird. Die Trommel 5 ist über eine Welle W und über die Lager L1, L2 in einem Maschinengestell der Karde drehbar gelagert. Die Welle W steht dabei mit einem nicht näher gezeigten Antrieb der Karde in Verbindung. Die hier gezeigte bereits bekannte Trommel 5 weist einen zylindrischen Trommelmantel M mit einer konstanten Wandstärke a auf. Der Trommelmantel M stützt sich dabei in ihrem Innenraum IR über, in einem axialen Abstand b zueinander angeordnete Speichen S1, S2 (auch Trommelboden genannt) auf der Welle W ab und ist mit dieser drehfest verbunden. Dabei sind die Speichen S1, S2 in einem umlaufenden Verbindungsbereich V1, bzw. V2 auf der inneren Umfangsfläche U2 des Trommelmantels M befestigt. Die Befestigung kann durch Schweissnähte (schematisch angedeutet), durch einen Presssitz oder auf andere Weise erfolgen. Es ist auch möglich die Speichen S1, S2 einstückig mit dem Trommelmantel auszubilden (z. B. durch ein Giessverfahren).In Fig.2 is a sectional view AA of the drum 5 Fig.1 shown. The drum 5 is equipped on its outer peripheral surface U1 with a set G, which in the Fig.2 is indicated schematically. The drum 5 is rotatably mounted in a machine frame of the card via a shaft W and via the bearings L1, L2. The shaft W is connected to a card drive, which is not shown in detail. The already known drum 5 shown here has a cylindrical drum shell M with a constant wall thickness a. The drum jacket M is supported in its interior IR by spokes S1, S2 (also called drum base) arranged at an axial distance b from one another on the shaft W and is connected to it in a rotationally fixed manner. The spokes S1, S2 are attached to the inner peripheral surface U2 of the drum shell M in a peripheral connection area V1, or V2. The attachment can be done by welds (schematically indicated), by a press fit or in some other way. It is also possible to form the spokes S1, S2 in one piece with the drum casing (eg by a casting process).

In Fig.3 wird der Längsschnitt einer Trommel 5 gezeigt, welche ein Ausführungsbeispiel eines erfindungsgemäss ausgebildeten Trommelmantels M mit in ihrem Innenraum IR angeordneten Speichen S3, S4 zeigt. Dabei weist der Trommelmantel M im Bereich der Verbindungsbereiche V1, V2 mit den jeweiligen Speichen S3, S4 eine Wandstärke d1 auf. Ausgehend vom jeweiligen Verbindungsbereich V1, V2 - in axialer Richtung der Trommel 5 gesehen - wird die Wandstärke des Trommelmantels M zu beiden Seiten der Verbindungsbereiche V1, V2 kontinuierlich bis auf eine Mindestwandstärke d2 verringert. Dabei verläuft die innere Umfangsfläche U2, ausgehend von der Innenfläche IF des jeweiligen Verbindungsbereichs V1, V2 unter einem Winkel c1, bzw. c2. Die Winkel c1 und c2 können unterschiedlich sein oder den gleichen Wert haben. Im vorliegenden Ausführungsbeispiel der Fig.3 ist ein Teilabschnitt T des Trommelmantels M mit einer Länge s mit einer konstanten Wanddicke d2 versehen.In Fig.3 the longitudinal section of a drum 5 is shown, which shows an exemplary embodiment of a drum casing M designed according to the invention with spokes S3, S4 arranged in its interior IR. The drum jacket M has a wall thickness d1 in the area of the connection areas V1, V2 with the respective spokes S3, S4. Starting from the respective connection area V1, V2--seen in the axial direction of the drum 5--the wall thickness of the drum jacket M on both sides of the connection areas V1, V2 is continuously reduced down to a minimum wall thickness d2. The inner peripheral surface U2 runs at an angle c1 or c2, starting from the inner surface IF of the respective connection area V1, V2. The angles c1 and c2 can be different or have the same value. In the present embodiment Fig.3 a section T of the drum casing M with a length s is provided with a constant wall thickness d2.

Wie bereits im Ausführungsbeispiel der Fig.2 beschrieben sind auch im Ausführungsbeispiel der Fig.3 die Speichen S3, S4 in einem axialen Abstand b zueinander angeordnet und stützen sich auf eine Welle W ab, mit welcher sie drehfest verbunden sind. Über die Lager L1, L2 ist die Welle W in einem Maschinengestell drehbar gelagert und steht mit einem nicht gezeigten Antrieb in Verbindung.As in the embodiment of Fig.2 are also described in the embodiment of FIG Fig.3 the spokes S3, S4 are arranged at an axial distance b from one another and are supported on a shaft W, to which they are connected in a rotationally fixed manner. The shaft W is rotatably mounted in a machine frame via the bearings L1, L2 and is connected to a drive (not shown).

Durch die im Beispiel der Fig.3 gezeigt kontinuierliche Verringerung der Wandstärke des Trommelmantels, ausgehend vom jeweiligen Verbindungsbereich V1, V2 der Speichen S3, S4, werden die im Betrieb auf den Trommelmantel M einwirkenden Zentrifugalkräfte besser aufgefangen und entsprechend abgeleitet, so dass es insbesondere im Bereich zwischen den Speichen S3, S4 zu weniger Ausformungen im Durchmesserbereich kommt.Through the in the example of Fig.3 shown continuous reduction in the wall thickness of the drum shell, starting from the respective connection area V1, V2 of the spokes S3, S4, the centrifugal forces acting on the drum shell M during operation are absorbed better and dissipated accordingly, so that it is particularly in the area between the spokes S3, S4 to fewer formations in the diameter range.

Die vergrösserte Darstellung der Fig.4 zeigt einen Teilabschnitt der Trommel nach Fig.3, wobei in einem weiteren Ausführungsbeispiel die Verringerung der Wandstärke d1 im jeweiligen Verbindungsbereich V1 bis zu einer Mindestwandstärke d2 in Form einer Kurve P verläuft. Durch diese Ausführung ist eine optimale Aufnahme, bzw. Ableitung der auftretenden Zentrifugalkräfte im Trommelmantel M während des Betriebes möglich.The enlarged view of the Fig.4 shows a section of the drum Fig.3 , In a further exemplary embodiment, the reduction in wall thickness d1 in the respective connection region V1 runs in the form of a curve P down to a minimum wall thickness d2. This design enables optimal absorption or dissipation of the centrifugal forces that occur in the drum shell M during operation.

Es ist jedoch auch eine andere Ausführung im Rahmen der Erfindung möglich, wobei im Bereich des Trommelmantels M zwischen den Speichen S3, S4, ausgehend vom jeweiligen Verbindungsbereich V1, V2, sich die Wandstärke der Trommelmantels M in Form eine Parabel (Fig.4) verjüngt, während in dem Bereich des Trommelmantels M, welcher von der jeweiligen Speiche S3, S4 zur jeweiligen Stirnfläche der Trommel zeigt, die Verjüngung der Wandstärke des Trommelmantels kontinuierlich abnimmt, wie im Beispiel der Fig.3 gezeigt wurde.However, another embodiment is also possible within the scope of the invention, with the wall thickness of the drum casing M in the area of the drum casing M between the spokes S3, S4, starting from the respective connection area V1, V2, changing in the form of a parabola ( Fig.4 ) tapers, while in the area of the drum shell M, which points from the respective spoke S3, S4 to the respective end face of the drum, the tapering of the wall thickness of the drum shell decreases continuously, as in the example of Fig.3 was shown.

Es sind noch weitere Ausführungen möglich, wobei z. B. kein Mittelabschnitt T mit gleichbleibendem Wandquerschnitt vorgesehen ist. D.h. die Verjüngung der Wandstärke des Trommelmantels M würde in diesem Fall, jeweils ausgehend von den Verbindungsbereichen V1, V2, bis zur Mitte der Trommel führen.There are other versions possible, where z. B. no central section T is provided with a constant wall cross-section. In other words, in this case, the tapering of the wall thickness of the drum jacket M would lead to the middle of the drum, starting from the connection areas V1, V2.

BezugszeichenReference sign

11
Kardecard
22
Zuführschachtfeed chute
33
Speisewalzefood roller
44
Vorreisserlicker
55
Kardiertrommel (Trommel)carding drum (drum)
66
Wanderdeckelaggregatrevolving flat unit
77
Hauptkardierzonemain carding zone
88th
Abnehmercustomer
99
Abnehmerwalzedoffer roller
1010
Presswalzenpaarpair of press rollers
1111
Vliestrichterfleece funnel
1212
Kalanderwalzenpaarpair of calender rolls
DD
Deckelstabflat bar
GG
Garniturset
IFIF
InnenflächeInner surface
IRIR
Innenrauminner space
MM
Trommelmanteldrum shell
PP
Parabelparabola
S1 - S4S1 - S4
Speichespoke
TT
Teilabschnittsection
U1U1
Äussere UmfangsflächeOuter perimeter
U2U2
Innere Umfangsflächeinner peripheral surface
V1, V2V1, V2
Verbindungsbereicheconnection areas
WW
WelleWave
aa
Manteldickejacket thickness
bb
Abstand SpeichenSpacing spokes
c1, c2c1, c2
Winkelangle
d1d1
WandstärkeWall thickness
d2d2
Mindestwandstärkeminimum wall thickness
ss
Länge TeilabschnittLength section

Claims (8)

  1. A drum (5) for a carding machine (1), comprising a cylindrical drum shell (M) that has a wall thickness (a, d1, d2) and is connected in the interior space (IR) to at least two spokes (S1, S2, S3, S4) that run in a radial direction and are arranged at a distance (b) from one another, as seen in the axial direction of the drum (5), in which the wall thickness of the drum shell (M) is of a greater dimension (d1) in the area of the connection (V1, V2) from the respective spoke (S3, S4) than the wall thickness outside of this connecting area (V1, V2), in that the wall thickness (d1) of the drum shell - as seen in the axial direction of the drum - decreases to a minimum wall thickness (d2) - at least in the area between the spokes (S3, S4) - starting from the connecting area of the respective spoke, characterized in that the reduction in wall thickness of the drum shell (M) is continuous or in the form of a curve.
  2. The drum (5) for a carding machine according to claim 1, characterized in that the wall thickness of the drum shell (M) - as seen in the axial direction of the drum - decreases continuously to a minimum wall thickness (d2) - on both sides of the respective connecting area (V1, V2) - starting from the respective spoke (S3, S4).
  3. The drum (5) for a carding machine (1) according to claim 4, characterized in that the reduction in wall thickness of the drum shell (M) is in the form of a parabola (P).
  4. The drum (5) for a carding machine (1) according to any one of the preceding claims, characterized in that the greater dimension (d1) of the wall thickness of the drum shell (M) in the connecting area (V1, V2) with the respective spoke (S3, S4) is between 5.0 mm and 25.0 mm.
  5. The drum (5) for a carding machine (1) according to any one of the preceding claims, characterized in that the minimum wall thickness (d2) of the drum shell (M) is between 2.0 mm and 15.0 mm.
  6. The drum (5) for a carding machine (1) according to any one of the preceding claims, characterized in that at least one partial section (T) of the drum shell (M) has a minimum wall thickness (d2) - as seen in the axial direction of the drum (5) - between the spokes (S1, S2), such that the length (s) of the partial section (T) amounts to between 5% and 80% of the distance (b) between the connecting area (V1, V2) of two connecting spokes (S3, S4).
  7. The drum (5) for a carding machine (1) according to any one of the preceding claims, characterized in that the distance (b) between the connecting area (V1, V2) of two neighboring spokes (S3, S4) is between 400 mm and 1300 mm - as seen in the axial direction of the drum.
  8. The carding machine (1) having a drum (5) according to any one of the preceding claims.
EP18729205.7A 2017-05-24 2018-05-16 Drum for a carding machine Active EP3631059B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00675/17A CH713801A1 (en) 2017-05-24 2017-05-24 Drum for a card.
PCT/IB2018/053408 WO2018215884A1 (en) 2017-05-24 2018-05-16 Drum for a carding machine

Publications (2)

Publication Number Publication Date
EP3631059A1 EP3631059A1 (en) 2020-04-08
EP3631059B1 true EP3631059B1 (en) 2022-12-21

Family

ID=62528790

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18729205.7A Active EP3631059B1 (en) 2017-05-24 2018-05-16 Drum for a carding machine

Country Status (4)

Country Link
EP (1) EP3631059B1 (en)
CN (1) CN110678589B (en)
CH (1) CH713801A1 (en)
WO (1) WO2018215884A1 (en)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB762453A (en) * 1952-04-23 1956-11-28 Gilbert Edward Fisher A new or improved construction of metal cylinder, drum, roller or the like
GB762543A (en) * 1953-09-03 1956-11-28 Gen Electric Improvements relating to the production of grain oriented silicon steel
DE1510199A1 (en) * 1966-10-08 1970-07-23 Bovensiepen Dipl Ing Hans Frie Card
SU874778A1 (en) * 1979-06-11 1981-10-23 Ленинградский ордена Трудового Красного Знамени институт текстильной и легкой промышленности им. С.М.Кирова Card drum
JPS6034031Y2 (en) * 1982-05-12 1985-10-09 豊和工業株式会社 Fixing device for combing cylinder in comber
DE3531850A1 (en) * 1985-09-06 1987-03-19 Schubert & Salzer Maschinen DRUM FOR CARDING MACHINES
US5265750A (en) 1990-03-05 1993-11-30 Hollingsworth U.K. Limited Lightweight cylinder construction
US5920961A (en) * 1997-11-10 1999-07-13 John D. Hollingsworth On Wheels, Inc. Ventilating carding roll
EP1106717A1 (en) * 1999-12-03 2001-06-13 Maschinenfabrik Rieter Ag Cylinder for carding machines
DE102004035771A1 (en) 2004-07-23 2006-03-16 Trützschler GmbH & Co KG Device on a card with a drum, the drum opposite garnished and / or non-garnished elements and fixed side panels
DE102004035770A1 (en) * 2004-07-23 2006-03-16 Trützschler GmbH & Co KG Roller for fiber processing machine, z. B. spinning preparation machine such as cards, cleaners o. The like., Flockenspeiser, carding, nonwoven imaging machine o. The like.
DE102005029767A1 (en) * 2005-06-24 2007-01-04 TRüTZSCHLER GMBH & CO. KG Device on a spinning preparation machine, in particular carding machine, carding machine, cleaner o. The like., With a cooling system

Also Published As

Publication number Publication date
CH713801A1 (en) 2018-11-30
EP3631059A1 (en) 2020-04-08
WO2018215884A1 (en) 2018-11-29
CN110678589A (en) 2020-01-10
CN110678589B (en) 2022-04-19

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