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EP1991725B1 - Wearing coating for delivery rollers of a drawing roller frame - Google Patents

Wearing coating for delivery rollers of a drawing roller frame Download PDF

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Publication number
EP1991725B1
EP1991725B1 EP07704107.7A EP07704107A EP1991725B1 EP 1991725 B1 EP1991725 B1 EP 1991725B1 EP 07704107 A EP07704107 A EP 07704107A EP 1991725 B1 EP1991725 B1 EP 1991725B1
Authority
EP
European Patent Office
Prior art keywords
deflecting rail
apron
rail
pressure roller
cross
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.)
Not-in-force
Application number
EP07704107.7A
Other languages
German (de)
French (fr)
Other versions
EP1991725A1 (en
Inventor
Peter Artzt
Heinz Müller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deutsche Institute fuer Textil und Faserforschung Denkendorf DITF
Original Assignee
Deutsche Institute fuer Textil und Faserforschung Denkendorf DITF
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Publication date
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Publication of EP1991725A1 publication Critical patent/EP1991725A1/en
Application granted granted Critical
Publication of EP1991725B1 publication Critical patent/EP1991725B1/en
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Classifications

    • 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
    • D01H5/26—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by one or more endless aprons
    • 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
    • D01H5/74—Rollers or roller bearings
    • D01H5/80—Rollers or roller bearings with covers; Cots or covers
    • 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
    • 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 roll stretching apparatus for spinning machines in which the lining for the printing roller at the exit of a default field consists of an outer and an inner layer attached to the printing roll core and the outer layer is thinner and harder than the inner layer, wherein the outer layer loosely surrounds the inner layer, so that the outer layer can move relative to the inner layer.
  • Such a device is in the DE 102 60 025.2 described. Since the Riemchenbelag at the output cylinder has a about 40 times higher running speed than is the case with conventional Verzugsriemchen, it is very important that the Riemchenbelag is well managed and causes as little friction on the deflection.
  • the clamping force required for the guidance of the Riemchenbelages is therefore very low and functional only generated by the fact that the Riemchenbelag in the unloaded state in the circumferential direction approximately circular form will take ( DE 103 48 452 A1 ). Due to this low voltage with which the belt lining slides over the deflecting rail, fibers accumulate on the deflecting rail during prolonged operation of this device. As a result, windings form around the deflection rail, which prevent easy sliding over the deflection rail and generate an ever higher voltage, which ultimately leads to the breakage of the deflection rail.
  • the running properties of the Riemchenbelages on the deflection rail are affected by the fact that the applied to prevent longitudinal thread insert is usually produced by winding a thread on the first inner layer, which is then covered with another layer. As a result, it happens again and again that at the high speed of the belt lining behaves asymmetrically according to the winding and has the tendency to one side expire. By attaching Borden to the deflecting this can be counteracted. However, the edges of the Riemchenbelages are strained and worn by the tarnishing against the board.
  • the object of the invention is to avoid the disadvantages described and to avoid interference during sliding of the very fast running Riemchenbelages on the deflection.
  • the circumference of the cross section of the deflection rail is greater than the length of the longest fiber of the fiber material processed on the stretching device. Due to the curvature of Riemchengleit Chemistry the deflection rail transversely to Riemchenlaufraum startup of the fast-running Riemchenbelages is avoided at Begrenzungsborde. The limitation by shelves can even be omitted altogether, especially if the covering formed as Endlosriemchen is equipped with a double thread insert, the thread inserts are wound in opposite directions.
  • the opposite winding of the thread insert eliminates the asymmetric behavior of the Riemchenbelages at high speeds.
  • the rigid holder for the Riemchenbelag is preferably freely rotatably mounted on the pressure roller axle and is supported by stops on Oberwalzentragarm the stretching device. In this way, a particularly simple and reliable guidance of the Riemchenbelages is achieved.
  • the stretching device in FIG. 1 shows the usual construction of a Doppelriemchenstreckwerkes with the lower cylinders 31, 61 and 71, by means of which the fiber strand F is warped to a thread F '.
  • the middle pressure roller 6 is wrapped by a Verzugsriemchen 60, which is guided by the Riemchen Kofig 63 and tensioned.
  • the lower cylinder 61 is looped by a Verzugsriemchen 62, which runs over the deflection rail 64 and against the Oberriemchen 60 is pressed.
  • the delivery cylinder pair consists of the lower cylinder 31 and the pressure roller 3, which is wrapped by a Riemchenbelag 1, which runs over the deflection rail 2. Since the pressure roller 3 is about the 40 illustration. 60 times the speed of the pressure rollers 6 and 7, the Belagriemchen must 1 run very fast.
  • the deflecting rail 2 is therefore provided with a smooth, low-friction Riemchengleit Structure 27, and formed as a belt lining 1 of the pressure roller 3 is only slightly stretched. It suffices for this purpose, the residual stress of Riemchenbelages 1, which would assume circular shape in the free unstressed state. Due to the arrangement of the deflection rail 2, the belt covering 1 is stretched. The resulting tension is sufficient for the smooth running of the Riemchenbelages. 1
  • a cleaning roller 5 is arranged in a conventional manner to keep the Riemchenbelag 1 of fibers free.
  • the stretching device accumulate on the inside of the Riemchenbelages 1 between the Riemchenbelag 1 and the Riemchengleit Structure 27 of the deflecting rail 2 fibers that can not be eliminated or prevented by the cleaning roller.
  • These fibers settle, so that there is an ever greater accumulation of fibers on the sliding surface 27 of the deflection rail 2 and the tension of the Riemchenbelages 1 increases inadmissible. The tension can even become so great that not only the apron pad 1 is considerably braked and thus the run is impaired, but that the deflecting rail 2 breaks.
  • the deflection rail 2 Due to the design of the deflection rail 2, in particular of the cross-sectional circumference U, the accumulation of fibers between the belt covering 1 and the belt sliding surface 27 of the deflection rail 2 is counteracted. It has been shown that it depends on the size of the circumference U, which should be greater than the average staple length of the distorted on the stretching device fiber material in any case. Good results have been achieved, for example, with a cross-sectional circumference U of the deflecting rail 2 of at least 1.5 times the mean fiber length.
  • the cross-sectional circumference U of the deflection rail 2 should be slightly longer than the longest fiber of the fiber material warped on the roll stretching device be.
  • the cross-sectional shape also plays a certain role here. It can be circular according to FIG. 2 , However, it has been shown that cross-sectional shapes, as in FIG. 1 shown or in the FIGS. 3 and 4 It is best to avoid the accumulation of fibers under the belt covering 1. Nevertheless, it is important that the cross-sectional circumference U is sufficiently large so that the fibers can not form a ring around the deflecting rail 2.
  • FIG. 3 shows, for example, a cross section in which the Riemchengleit Matter 27 is circular arc-shaped, while the flanks are flattened. In the deflection rail 2 according to FIG.
  • FIG. 1 is the cross section of the deflecting rail 2 rectangular, but the small sides are rounded arcuate, so that the Riemchengleit Structure 27 is rounded.
  • the Riemchengleit Structure 27 of the deflection rail 22 is also rounded, but the sides held straight.
  • This cross-sectional shape is particularly resistant to compressive loads and provides a smaller Riemchengleit Structure 27, so that little friction is exerted on the Riemchenbelag 1.
  • a cleaning roller 5 is suitably arranged above the printing cylinder 3, to keep the Riemchenbelag 1 on its outside of fibers free.
  • FIG. 5 shows the holder 4 with two pairs arranged Umlenkschienen 23.
  • the holder 4 has cheeks 41, with which he sits on the axis 65 of the pressure roller 3.
  • the cheeks 41 are made in one piece with the two deflection rails 23.
  • the deflecting rails 23 have cylindrical Riemchengleit vom 27 with side rims 24, which prevent drainage of the Riemchenbelages 1. Due to the one-piece design of the holder 4 with the deflection rails 23 of this part is particularly cheap to manufacture and as only a part to assemble.
  • FIG. 6 shows a similar embodiment as in FIG. 5
  • the Umlenkschienen 200 in the cheeks 41 of the holder 4 by means of a thread 201 screwed and can be replaced without replacing the holder 4.
  • the deflection rails 200 are equipped with a slightly curved Riemchengleit Structure 203.
  • the Riemchenbelag 1 is held centrally on the sliding surface 203 and avoid tarnishing to the sleeve 204.
  • a board can be omitted, which facilitates the removal of the Riemchenbelages 1.
  • FIG. 8 is a further embodiment of a holder 40 for the Riemchenbelag 1 shown.
  • deflecting rails 25 are formed in pairs on the cheeks 42 of the holder 40, so that they form a part with the holder 40.
  • the cheeks 42 have recesses 44, with which the holder 40 is seated on the axis 65 of the pressure roller 3 and is supported.
  • a side board 26 is formed in each case, which projects beyond the Riemchengleit Structure 203 of the deflection rail 25.
  • FIG. 9 the holder 40 is shown in the installed position, the view of the holder 40 the section AA of FIG. 8 equivalent.
  • the axis 65 of the pressure roller 3 is held in the usual manner in a spring clamp not shown in Oberwalzentragarm 51.
  • the holder 40 engages by means of the recesses 44 on the pressure roller axis 65 to which it is freely pivotable.
  • the pressure exerted on the pressure roller 3 and Riemchenbelag 1 torque of the holder 40 is pivoted in operation counterclockwise, so that it is supported on the stops 43 on Oberwalzentragarm 51 and is fixed in this position. Appropriately, this should be done at an angle ⁇ of about 30 °.
  • This attachment is extremely simple and ensures without special fasteners assembly and disassembly of the entire holder 40 together with the Belagriemchen 1.
  • the Belagriemchen 1 can be easily strip from the pressure roller 3 laterally beyond the board 26 of the deflection rail 25. Still, it's a reliable one Holder and guide the Riemchenbelages 1 guaranteed even at high rotational speeds of the pressure roller 3.
  • the Riemchenbelag 1 is stiffened by a thread insert in the direction of the Riemchenbelages 1 and thus largely inelastic in this direction.
  • the thread insert is wound in the manufacture of the Riemchenbelages 1 in a spiral on the running layer of Riemchenbelages 1.
  • the Riemchenkanten 13 should be completely smooth, so that no fibers caught on it and can be taken. Such fringe-free cutting is achieved by laser cutting.
  • the strap covering 1 exhibits an asymmetrical behavior and runs on one side against the board 24.
  • the edges 13, which are cut in a smooth manner, are roughened, and fringe formation and the above-described negative effects again occur.
  • a thread insert 11 in Z-shape and a thread insert 12 in S-shape a crossing of the threads in the spiral winding.
  • this counteracts the asymmetric behavior.
  • the Riemchenbelag 10 runs evenly, so that there is no damage by tarnishing at the edges 13.
  • the ribs 24 can even be omitted if the Riemchengleit Structure 203 of the deflecting rail 200 has a slight curvature transverse to Riemchenlaufraum.
  • the Riemchenbelag 10 is thereby always held and guided in the middle of the sliding surface 203.
  • the omission of the outer rims 24 also has the advantage that the Riemchenbelag 10 can be replaced easily, even if the deflection rail 200 is rigidly arranged. In the execution according to FIG. 6 the strap pad 10 can simply slide down to the side of the deflection rail 200. A lifting over a board is not required.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Description

Die Erfindung betrifft eine Walzenstreckvorrichtung für Spinnereimaschinen, bei welcher der Belag für den Druckroller am Ausgang eines Verzugsfeldes aus einer äußeren und einer auf dem Druckrollerkern befestigten inneren Schicht besteht und die Außenschicht dünnwandiger und härter als die Innenschicht ist, wobei die Außenschicht die Innenschicht lose umgibt, so dass sich die Außenschicht relativ zur Innenschicht bewegen kann.The invention relates to a roll stretching apparatus for spinning machines in which the lining for the printing roller at the exit of a default field consists of an outer and an inner layer attached to the printing roll core and the outer layer is thinner and harder than the inner layer, wherein the outer layer loosely surrounds the inner layer, so that the outer layer can move relative to the inner layer.

Eine derartige Vorrichtung ist in der DE 102 60 025.2 beschrieben. Da der Riemchenbelag am Ausgangszylinder eine etwa 40 mal höhere Laufgeschwindigkeit aufweist, als dies bei üblichen Verzugsriemchen der Fall ist, kommt es sehr darauf an, dass der Riemchenbelag gut geführt ist und möglichst wenig Reibung an der Umlenkschiene verursacht. Die für die Führung des Riemchenbelages erforderliche Spannkraft ist deshalb sehr gering und zweckmäßig nur dadurch erzeugt, dass der Riemchenbelag in unbelastetem Zustand in Umfangsrichtung annähernd Kreisform annehmen will ( DE 103 48 452 A1 ). Bedingt durch diese geringe Spannung, mit der der Riemchenbelag über die Umlenkschiene gleitet, sammeln sich bei längerem Betrieb dieser Vorrichtung Fasern an der Umlenkschiene an. Als Folge bilden sich Wickel um die Umlenkschiene, die das leichte Gleiten über die Umlenkschiene hindern und eine immer höhere Spannung erzeugen, die schließlich zum Bruch der Umlenkschiene führt.Such a device is in the DE 102 60 025.2 described. Since the Riemchenbelag at the output cylinder has a about 40 times higher running speed than is the case with conventional Verzugsriemchen, it is very important that the Riemchenbelag is well managed and causes as little friction on the deflection. The clamping force required for the guidance of the Riemchenbelages is therefore very low and functional only generated by the fact that the Riemchenbelag in the unloaded state in the circumferential direction approximately circular form will take ( DE 103 48 452 A1 ). Due to this low voltage with which the belt lining slides over the deflecting rail, fibers accumulate on the deflecting rail during prolonged operation of this device. As a result, windings form around the deflection rail, which prevent easy sliding over the deflection rail and generate an ever higher voltage, which ultimately leads to the breakage of the deflection rail.

Des Weiteren werden die Laufeigenschaften des Riemchenbelages über die Umlenkschiene dadurch beeinträchtigt, dass die zur Verhinderung von Längsdehnung aufgebrachte Fadeneinlage üblicherweise durch Aufspulen eines Fadens auf die erste innere Schicht erzeugt wird, die dann mit einer weiteren Schicht überdeckt wird. Dadurch kommt es immer wieder vor, dass bei der hohen Laufgeschwindigkeit der Riemchenbelag sich entsprechend der Windung asymmetrisch verhält und die Neigung hat, nach einer Seite abzulaufen. Durch Anbringung von Borden an der Umlenkschiene kann diesem entgegengewirkt werden. Allerdings werden durch das Anlaufen gegen den Bord die Kanten des Riemchenbelages strapaziert und abgenutzt.Furthermore, the running properties of the Riemchenbelages on the deflection rail are affected by the fact that the applied to prevent longitudinal thread insert is usually produced by winding a thread on the first inner layer, which is then covered with another layer. As a result, it happens again and again that at the high speed of the belt lining behaves asymmetrically according to the winding and has the tendency to one side expire. By attaching Borden to the deflecting this can be counteracted. However, the edges of the Riemchenbelages are strained and worn by the tarnishing against the board.

Aufgabe der Erfindung ist es, die geschilderten Nachteile zu vermeiden und Beeinträchtigungen beim Gleiten des sehr schnell laufenden Riemchenbelages über die Umlenkschiene zu vermeiden.The object of the invention is to avoid the disadvantages described and to avoid interference during sliding of the very fast running Riemchenbelages on the deflection.

Diese Aufgabe wird durch die Merkmale von Anspruch 1 sowie die Merkmale der Unteransprüche gelöst. Es hat sich überraschenderweise gezeigt, dass bei genügend großer Bemessung des Umfanges des Querschnitts der Umlenkschiene diese Wickelstörungen vermieden werden können. Vorzugsweise ist der Umfang des Querschnittes der Umlenkschiene größer als die Länge der längsten Faser des auf der Streckvorrichtung verarbeiteten Fasermaterials. Durch die Wölbung der Riemchengleitfläche der Umlenkschiene quer zur Riemchenlaufrichtung wird ein Anlaufen des schnell laufenden Riemchenbelages an Begrenzungsborde vermieden. Die Begrenzung durch Borde kann sogar ganz entfallen, insbesondere dann, wenn der als Endlosriemchen ausgebildete Belag mit einer doppelten Fadeneinlage ausgestattet ist, wobei die Fadeneinlagen gegenläufig gewickelt sind. Die gegenläufige Wicklung der Fadeneinlage beseitigt bei hohen Laufgeschwindigkeiten das asymmetrische Verhalten des Riemchenbelages. Es ergibt sich außerdem der Vorteil, dass bei Verwendung eines starren Halters der Riemchenbelag sich dennoch leicht wechseln lässt. Der starre Halter für den Riemchenbelag ist vorzugsweise frei drehbar auf der Druckrollerachse gelagert und stütz sich über Anschläge am Oberwalzentragarm der Streckvorrichtung ab. Auf diese Weise wird eine besonders einfache und betriebssichere Führung des Riemchenbelages erreicht.This object is solved by the features of claim 1 and the features of the subclaims. It has surprisingly been found that with sufficiently large dimensioning of the circumference of the cross section of the deflecting this winding disturbances can be avoided. Preferably, the circumference of the cross section of the deflection rail is greater than the length of the longest fiber of the fiber material processed on the stretching device. Due to the curvature of Riemchengleitfläche the deflection rail transversely to Riemchenlaufrichtung startup of the fast-running Riemchenbelages is avoided at Begrenzungsborde. The limitation by shelves can even be omitted altogether, especially if the covering formed as Endlosriemchen is equipped with a double thread insert, the thread inserts are wound in opposite directions. The opposite winding of the thread insert eliminates the asymmetric behavior of the Riemchenbelages at high speeds. There is also the advantage that when using a rigid holder of the strap covering can still easily change. The rigid holder for the Riemchenbelag is preferably freely rotatably mounted on the pressure roller axle and is supported by stops on Oberwalzentragarm the stretching device. In this way, a particularly simple and reliable guidance of the Riemchenbelages is achieved.

Weitere Einzelheiten der Erfindung werden anhand der Zeichnungen beschrieben. Es zeigen

Figur 1
eine Querschnittsansicht der Streckvorrichtung
Figuren 2 bis 4
verschiedene Querschnittsprofile der Umlenkschiene
Figur 5
eine einstückige Ausführung der Umlenkschiene mit dem Halter
Figur 6
eine auswechselbare Umlenkschiene mit Halter
Figur 7
den nicht beanspruchten Riemchenbelag mit gegenläufig gewundenen Fadeneinlagen
Figur 8
eine weitere Ausführung des Riemchenbelaghalters in der Draufsicht
Figur 9
den Riemchenbelaghalter aus Figur 8 im Einbauzustand und im Schnitt.
Further details of the invention will be described with reference to the drawings. Show it
FIG. 1
a cross-sectional view of the stretching device
FIGS. 2 to 4
different cross-sectional profiles of the deflection rail
FIG. 5
a one-piece design of the deflection with the holder
FIG. 6
an exchangeable deflection rail with holder
FIG. 7
the unclaimed Riemchenbelag with oppositely wound thread inserts
FIG. 8
a further embodiment of the Riemchenbelaghalters in plan view
FIG. 9
the strappy pad holder off FIG. 8 in installed condition and in section.

Die Streckvorrichtung in Figur 1 zeigt den üblichen Aufbau eines Doppelriemchenstreckwerkes mit den Unterzylindern 31, 61 und 71, mittels welcher der Faserverband F zu einem Faden F' verzogen wird. Der mittlere Druckroller 6 wird von einem Verzugsriemchen 60 umschlungen, das durch den Riemchenkäfig 63 geführt und gespannt wird. Der Unterzylinder 61 wird durch ein Verzugsriemchen 62 umschlungen, das über die Umlenkschiene 64 läuft und gegen das das Oberriemchen 60 gedrückt wird. Für die Zusammenfassung des Faserverbandes vor und im Streckfeld sind Verdichter 8 und 9 vorgesehen.The stretching device in FIG. 1 shows the usual construction of a Doppelriemchenstreckwerkes with the lower cylinders 31, 61 and 71, by means of which the fiber strand F is warped to a thread F '. The middle pressure roller 6 is wrapped by a Verzugsriemchen 60, which is guided by the Riemchenkäfig 63 and tensioned. The lower cylinder 61 is looped by a Verzugsriemchen 62, which runs over the deflection rail 64 and against the Oberriemchen 60 is pressed. For the summary of the fiber structure before and in the drafting field compressors 8 and 9 are provided.

Das Lieferzylinderpaar besteht aus dem Unterzylinder 31 und dem Druckroller 3, der von einem Riemchenbelag 1 umschlungen wird, welcher über die Umlenkschiene 2 läuft. Da der Druckroller 3 etwa die 40bzw. 60-fache Geschwindigkeit der Druckroller 6 bzw. 7 aufweist, muss das Belagriemchen 1 sehr schnell laufen. Die Umlenkschiene 2 ist deshalb mit einer glatten, reibungsarmen Riemchengleitfläche 27 versehen, und der als Riemchen ausgebildete Belag 1 des Druckrollers 3 ist nur geringfügig gespannt. Es genügt hierfür die Eigenspannung des Riemchenbelages 1, der im freien ungespannten Zustand Kreisform annehmen würde. Durch die Anordnung der Umlenkschiene 2 wird der Riemchenbelag 1 gestreckt. Die dadurch entstehende Spannung genügt bereits für den einwandfreien Lauf des Riemchenbelages 1.The delivery cylinder pair consists of the lower cylinder 31 and the pressure roller 3, which is wrapped by a Riemchenbelag 1, which runs over the deflection rail 2. Since the pressure roller 3 is about the 40bzw. 60 times the speed of the pressure rollers 6 and 7, the Belagriemchen must 1 run very fast. The deflecting rail 2 is therefore provided with a smooth, low-friction Riemchengleitfläche 27, and formed as a belt lining 1 of the pressure roller 3 is only slightly stretched. It suffices for this purpose, the residual stress of Riemchenbelages 1, which would assume circular shape in the free unstressed state. Due to the arrangement of the deflection rail 2, the belt covering 1 is stretched. The resulting tension is sufficient for the smooth running of the Riemchenbelages. 1

Oberhalb des Druckrollers 3 und des Riemchenbelages 1 ist eine Putzwalze 5 in üblicher Weise angeordnet, um den Riemchenbelag 1 von Fasern frei zu halten. Bei längeren Laufzeiten der Streckvorrichtung sammeln sich jedoch auf der Innenseite des Riemchenbelages 1 zwischen dem Riemchenbelag 1 und der Riemchengleitfläche 27 der Umlenkschiene 2 Fasern an, die von der Putzwalze nicht beseitigt oder verhindert werden können. Diese Fasern setzen sich fest, so dass es zu einer immer größeren Ansammlung von Fasern auf der Gleitfläche 27 der Umlenkschiene 2 kommt und sich die Spannung des Riemchenbelages 1 unzulässig erhöht. Die Spannung kann sogar so groß werden, dass nicht nur der Riemchenbelag 1 erheblich gebremst und damit der Lauf beeinträchtigt wird, sondern dass die Umlenkschiene 2 bricht. Durch die Gestaltung der Umlenkschiene 2, insbesondere des Querschnittsumfanges U wird der Ansammlung von Fasern zwischen Riemchenbelag 1 und Riemchengleitfläche 27 der Umlenkschiene 2 entgegengewirkt. Es hat sich hierbei gezeigt, dass es auf die Größe des Umfanges U ankommt, der auf jeden Fall größer als die mittlere Stapellänge des auf der Streckvorrichtung verzogenen Fasermaterials sein soll. Gute Erfolge wurden beispielsweise mit einem Querschnittsumfang U der Umlenkschiene 2 von mindestens dem 1,5-fachen der mittleren Faserlänge erzielt. Da es offensichtlich darauf ankommt, dass Anfang und Ende einer Faser sich nicht um den Umfang U der Umlenkschiene 2 zu einem Ring schließen können, sollte vorzugsweise der Querschnittsumfang U der Umlenkschiene 2 geringfügig länger als die längste Faser des auf der Walzenstreckvorrichtung verzogenen Fasermaterials sein.Above the pressure roller 3 and the Riemchenbelages 1 a cleaning roller 5 is arranged in a conventional manner to keep the Riemchenbelag 1 of fibers free. At longer maturities of the stretching device, however, accumulate on the inside of the Riemchenbelages 1 between the Riemchenbelag 1 and the Riemchengleitfläche 27 of the deflecting rail 2 fibers that can not be eliminated or prevented by the cleaning roller. These fibers settle, so that there is an ever greater accumulation of fibers on the sliding surface 27 of the deflection rail 2 and the tension of the Riemchenbelages 1 increases inadmissible. The tension can even become so great that not only the apron pad 1 is considerably braked and thus the run is impaired, but that the deflecting rail 2 breaks. Due to the design of the deflection rail 2, in particular of the cross-sectional circumference U, the accumulation of fibers between the belt covering 1 and the belt sliding surface 27 of the deflection rail 2 is counteracted. It has been shown that it depends on the size of the circumference U, which should be greater than the average staple length of the distorted on the stretching device fiber material in any case. Good results have been achieved, for example, with a cross-sectional circumference U of the deflecting rail 2 of at least 1.5 times the mean fiber length. Since it obviously depends on the fact that the beginning and end of a fiber can not close around the circumference U of the deflection rail 2 to form a ring, preferably the cross-sectional circumference U of the deflection rail 2 should be slightly longer than the longest fiber of the fiber material warped on the roll stretching device be.

Auch die Querschnittsform spielt hierbei eine gewisse Rolle. Sie kann kreisförmig sein gemäß Figur 2. Es hat sich aber gezeigt, dass Querschnittsformen, wie in Figur 1 gezeigt oder in den Figuren 3 und 4 das Ansammeln von Fasern unter dem Riemchenbelag 1 am besten vermeiden. Wichtig ist aber dennoch, dass der Querschnittsumfang U genügend groß ist, damit die Fasern keinen Ring um die Umlenkschiene 2 bilden können. Figur 3 zeigt beispielsweise einen Querschnitt, bei dem die Riemchengleitfläche 27 kreisbogenförmig ist, während die Flanken abgeflacht sind. Bei der Umlenkschiene 2 gemäß Figur 1 ist der Querschnitt der Umlenkschiene 2 rechteckig, jedoch sind die kleinen Seiten bogenförmig abgerundet, so dass die Riemchengleitfläche 27 abgerundet ist. Bei der Ausführung gemäß Figur 4 ist die Riemchengleitfläche 27 der Umlenkschiene 22 ebenfalls abgerundet, jedoch die Seiten gerade gehalten. Diese Querschnittsform ist besonders widerstandsfähig gegen Druckbelastungen und bietet eine kleinere Riemchengleitfläche 27, so dass wenig Reibung auf den Riemchenbelag 1 ausgeübt wird. Wie der Figur 1 zu entnehmen ist, ist eine Putzwalze 5 zweckmäßig oberhalb des Druckzylinders 3 angeordnet, um den Riemchenbelag 1 auf seiner Außenseite von Fasern frei zu halten.The cross-sectional shape also plays a certain role here. It can be circular according to FIG. 2 , However, it has been shown that cross-sectional shapes, as in FIG. 1 shown or in the FIGS. 3 and 4 It is best to avoid the accumulation of fibers under the belt covering 1. Nevertheless, it is important that the cross-sectional circumference U is sufficiently large so that the fibers can not form a ring around the deflecting rail 2. FIG. 3 shows, for example, a cross section in which the Riemchengleitfläche 27 is circular arc-shaped, while the flanks are flattened. In the deflection rail 2 according to FIG. 1 is the cross section of the deflecting rail 2 rectangular, but the small sides are rounded arcuate, so that the Riemchengleitfläche 27 is rounded. In the execution according to FIG. 4 the Riemchengleitfläche 27 of the deflection rail 22 is also rounded, but the sides held straight. This cross-sectional shape is particularly resistant to compressive loads and provides a smaller Riemchengleitfläche 27, so that little friction is exerted on the Riemchenbelag 1. Again FIG. 1 can be seen, a cleaning roller 5 is suitably arranged above the printing cylinder 3, to keep the Riemchenbelag 1 on its outside of fibers free.

Figur 5 zeigt den Halter 4 mit zwei paarweise angeordneten Umlenkschienen 23. Der Halter 4 weist Wangen 41 auf, mit denen er auf der Achse 65 des Druckrollers 3 aufsitzt. Die Wangen 41 sind mit den beiden Umlenkschienen 23 einstückig ausgeführt. Die Umlenkschienen 23 weisen zylindrische Riemchengleitflächen 27 auf mit Seitenborden 24, die ein Ablaufen des Riemchenbelages 1 verhindern. Durch die einstückige Ausführung des Halters 4 mit den Umlenkschienen 23 ist dieses Teil besonders günstig herzustellen und als nur ein Teil zu montieren. FIG. 5 shows the holder 4 with two pairs arranged Umlenkschienen 23. The holder 4 has cheeks 41, with which he sits on the axis 65 of the pressure roller 3. The cheeks 41 are made in one piece with the two deflection rails 23. The deflecting rails 23 have cylindrical Riemchengleitflächen 27 with side rims 24, which prevent drainage of the Riemchenbelages 1. Due to the one-piece design of the holder 4 with the deflection rails 23 of this part is particularly cheap to manufacture and as only a part to assemble.

Figur 6 zeigt eine ähnliche Ausführung wie in Figur 5, jedoch sind hier die Umlenkschienen 200 in die Wangen 41 des Halters 4 mittels eines Gewindes 201 eingeschraubt und können ohne Auswechseln des Halters 4 ausgetauscht werden. Damit ist auf einfache Weise eine Anpassung an verschiedene Spindelteilungen möglich. Ferner sind die Umlenkschienen 200 mit einer leicht gewölbten Riemchengleitfläche 203 ausgestattet. Durch diese Wölbung quer zur Riemchenlaufrichtung wird der Riemchenbelag 1 mittig auf der Gleitfläche 203 gehalten und ein Anlaufen an die Manschette 204 vermieden. Auf der freien Seite der Umlenkschiene 200 kann ein Bord entfallen, was das Abnehmen des Riemchenbelages 1 erleichtert. FIG. 6 shows a similar embodiment as in FIG. 5 However, here are the Umlenkschienen 200 in the cheeks 41 of the holder 4 by means of a thread 201 screwed and can be replaced without replacing the holder 4. This makes it easy to adapt to different spindle divisions possible. Furthermore, the deflection rails 200 are equipped with a slightly curved Riemchengleitfläche 203. By this curvature transverse to Riemchenlaufrichtung the Riemchenbelag 1 is held centrally on the sliding surface 203 and avoid tarnishing to the sleeve 204. On the free side of the deflection rail 200, a board can be omitted, which facilitates the removal of the Riemchenbelages 1.

In Figur 8 ist eine weitere Ausführung eines Halters 40 für den Riemchenbelag 1 dargestellt. Entsprechend der üblichen Ausführung des Druckrollers 3 sind Umlenkschienen 25 paarweise an den Wangen 42 des Halters 40 angeformt, so dass sie ein Teil mit dem Halter 40 bilden. Die Wangen 42 weisen Ausnehmungen 44 auf, mit denen der Halter 40 auf der Achse 65 des Druckrollers 3 aufsitzt und sich abstützt. Am freien Ende der Umlenkschienen 25 ist jeweils ein Seitenbord 26 angeformt, der nur die Riemchengleitfläche 203 der Umlenkschiene 25 überragt.In FIG. 8 is a further embodiment of a holder 40 for the Riemchenbelag 1 shown. According to the usual embodiment of the pressure roller 3 deflecting rails 25 are formed in pairs on the cheeks 42 of the holder 40, so that they form a part with the holder 40. The cheeks 42 have recesses 44, with which the holder 40 is seated on the axis 65 of the pressure roller 3 and is supported. At the free end of the deflection rails 25, a side board 26 is formed in each case, which projects beyond the Riemchengleitfläche 203 of the deflection rail 25.

In Figur 9 ist der Halter 40 in Einbaustellung gezeigt, wobei die Sicht auf den Halter 40 dem Schnitt AA der Figur 8 entspricht. Die Achse 65 des Druckrollers 3 ist in üblicher Weise in einer nicht näher dargestellten Federklemmung im Oberwalzentragarm 51 gehalten. Mit den Wangen 42 greift der Halter 40 mittels der Ausnehmungen 44 über die Druckrollerachse 65, um die er frei schwenkbar ist. Entsprechend dem über den Druckroller 3 und Riemchenbelag 1 ausgeübten Drehmoment wird der Halter 40 im Betrieb gegen den Uhrzeigersinn geschwenkt, so dass er über die Anschläge 43 sich am Oberwalzentragarm 51 abstützt und in dieser Lage fixiert ist. Zweckmäßig soll dies in einem Winkel Ö von etwa 30° erfolgen. Diese Befestigung ist äußerst einfach und gewährleistet ohne besondere Befestigungsmittel eine Montage und Demontage des gesamten Halters 40 zusammen mit den Belagriemchen 1. Die Belagriemchen 1 lassen sich leicht von dem Druckroller 3 seitlich über den Bord 26 von der Umlenkschiene 25 abstreifen. Dennoch ist eine zuverlässige Halterung und Führung des Riemchenbelages 1 auch bei hohen Drehgeschwindigkeiten des Druckrollers 3 gewährleistet.In FIG. 9 the holder 40 is shown in the installed position, the view of the holder 40 the section AA of FIG. 8 equivalent. The axis 65 of the pressure roller 3 is held in the usual manner in a spring clamp not shown in Oberwalzentragarm 51. With the cheeks 42, the holder 40 engages by means of the recesses 44 on the pressure roller axis 65 to which it is freely pivotable. According to the pressure exerted on the pressure roller 3 and Riemchenbelag 1 torque of the holder 40 is pivoted in operation counterclockwise, so that it is supported on the stops 43 on Oberwalzentragarm 51 and is fixed in this position. Appropriately, this should be done at an angle Ö of about 30 °. This attachment is extremely simple and ensures without special fasteners assembly and disassembly of the entire holder 40 together with the Belagriemchen 1. The Belagriemchen 1 can be easily strip from the pressure roller 3 laterally beyond the board 26 of the deflection rail 25. Still, it's a reliable one Holder and guide the Riemchenbelages 1 guaranteed even at high rotational speeds of the pressure roller 3.

Wie in der DE 102 60 025.2 beschrieben, ist der Riemchenbelag 1 durch eine Fadeneinlage in Laufrichtung des Riemchenbelages 1 versteift und damit in dieser Richtung weitgehend unelastisch. Die Fadeneinlage wird bei der Herstellung des Riemchenbelages 1 in einer Spirale auf die Laufschicht des Riemchenbelages 1 aufgewunden. Beim Schneiden des Riemchenbelages 1 entstehen durch die Fadeneinlage an den Kanten hervorstehende Fransen. Dies wirkt sich nachteilig aus, weil diese Fransen zu Faseransammlungen führen. Die Riemchenkanten 13 sollen vollkommen glatt sein, so dass keine Fasern sich daran verfangen und mitgenommen werden können. Ein solches fransenfreies Schneiden wird durch das Schneiden mit Laser erreicht.Like in the DE 102 60 025.2 described, the Riemchenbelag 1 is stiffened by a thread insert in the direction of the Riemchenbelages 1 and thus largely inelastic in this direction. The thread insert is wound in the manufacture of the Riemchenbelages 1 in a spiral on the running layer of Riemchenbelages 1. When cutting the Riemchenbelages 1 caused by the thread insert on the edges protruding fringes. This has a disadvantageous effect because these fringes lead to fiber accumulation. The Riemchenkanten 13 should be completely smooth, so that no fibers caught on it and can be taken. Such fringe-free cutting is achieved by laser cutting.

Durch die in Spiralform aufgebrachte Fadeneinlage zeigt der Riemchenbelag 1 ein asymmetrisches Verhalten und läuft einseitig an dem Bord 24 an. Dadurch werden die an sich glatt geschnittenen Kanten 13 aufgeraut und es kommt wiederum zu Fransenbildung und die oben geschilderten negativen Auswirkungen. Durch das Aufbringen einer Fadeneinlage 11 in Z-Form und einer Fadeneinlage 12 in S-Form erfolgt eine Kreuzung der Fäden bei der Spiralwindung. Außerdem wird damit dem asymmetrischen Verhalten entgegengewirkt. Der Riemchenbelag 10 läuft gleichmäßig, so dass es zu keiner Beschädigung durch Anlaufen an die Kanten 13 kommt. Die Borde 24 können sogar weggelassen werden, wenn die Riemchengleitfläche 203 der Umlenkschiene 200 eine leichte Wölbung quer zur Riemchenlaufrichtung aufweist. Der Riemchenbelag 10 wird dadurch stets in der Mitte der Gleitfläche 203 gehalten und geführt. Das Weglassen der Außenborde 24 bringt zudem den Vorteil, dass sich der Riemchenbelag 10 leichter auswechseln lässt, auch wenn die Umlenkschiene 200 starr angeordnet ist. Bei der Ausführung gemäß Figur 6 lässt sich der Riemchenbelag 10 einfach zur Seite von der Umlenkschiene 200 herunterschieben. Ein Anheben über einen Bord ist nicht erforderlich.As a result of the spiral-shaped thread insert, the strap covering 1 exhibits an asymmetrical behavior and runs on one side against the board 24. As a result, the edges 13, which are cut in a smooth manner, are roughened, and fringe formation and the above-described negative effects again occur. By applying a thread insert 11 in Z-shape and a thread insert 12 in S-shape, a crossing of the threads in the spiral winding. In addition, this counteracts the asymmetric behavior. The Riemchenbelag 10 runs evenly, so that there is no damage by tarnishing at the edges 13. The ribs 24 can even be omitted if the Riemchengleitfläche 203 of the deflecting rail 200 has a slight curvature transverse to Riemchenlaufrichtung. The Riemchenbelag 10 is thereby always held and guided in the middle of the sliding surface 203. The omission of the outer rims 24 also has the advantage that the Riemchenbelag 10 can be replaced easily, even if the deflection rail 200 is rigidly arranged. In the execution according to FIG. 6 the strap pad 10 can simply slide down to the side of the deflection rail 200. A lifting over a board is not required.

Alle diese geschilderten Maßnahmen bewirken einen leichten und störungsfreien Lauf des Riemchenbelages 1 bzw. 10. Da dieser Riemchenbelag 1 bzw. 10 mit sehr großer Geschwindigkeit läuft, wirken sich geringfügige Störungen bereits erheblich aus. Durch die beschriebenen Maßnahmen können Störungen auf einfache Weise vermieden und ein einwandfreier Lauf des Belages 1 auch bei hohen Drehgeschwindigkeiten des Druckrollers 3 erreicht werden.All these measures described cause an easy and trouble-free running of the Riemchenbelages 1 and 10. Since this Riemchenbelag 1 or 10 runs at very high speed, minor disturbances already affect considerably. By the measures described disturbances can be avoided in a simple manner and a perfect running of the lining 1 can be achieved even at high rotational speeds of the pressure roller 3.

Claims (15)

  1. A roller drafting device for spinnery machines, the coating for the pressure roller at the discharge of a drafting zone consisting of an outer layer and an inner layer that is attached to the pressure roller core, the outer layer being thinner and harder than the inner layer and implemented as an endless apron loosely enclosing the inner layer so that the apron can be displaced relative to the inner layer and slides over a deflecting rail (2, 20, 21, 22, 25, 200), characterized in that the deflecting rail (2, 20, 21, 22, 25, 200) comprises a cross-sectional circumference (U) that is greater than the average staple length of the fiber material to be drafted on the roller drafting device.
  2. The device according to Claim 1, characterized in that the cross-sectional circumference (U) of the deflecting rail (2, 20, 21, 22, 25, 200) is at least 1.5 times the average fiber length.
  3. The device according to any one or more of the claims 1 or 2, characterized in that the cross-sectional circumference (U) of the deflecting rail (2, 20, 21, 22, 25, 200) is preferably slightly longer than the longest fiber of the fiber material drafted on the roller drafting device.
  4. The device according to any one or more of the claims 1 through 3, characterized in that the deflecting rail (2, 20, 21, 22, 25, 200) comprises an apron sliding surface (27, 203) having a circular arc cross section.
  5. The device according to any one or more of the claims 1 through 4, characterized in that the cross section of the deflecting rail (2, 21, 22, 25) is partially circular, partially flattened.
  6. The device according to any one or more of the claims 1 through 5, characterized in that the cross section of the deflecting rail (2) comprises a rectangle, the small sides thereof being rounded off as arcs.
  7. The device according to any one or more of the claims 1 through 6, characterized in that the apron sliding surface (203) of the deflecting rail (200) comprises a bulge transverse to the apron running direction.
  8. The device according to Claim 7, characterized in that the apron sliding surface (203) of the deflecting rail (200) is not bounded by a rim at the free end thereof.
  9. The device according to any one or more of the claims 1 through 8, characterized in that the deflecting rail (2, 20, 21, 22, 25, 200) is supported rigidly relative to the pressure roller (3) about which the apron covering (1) is looped.
  10. The device according to Claim 9, characterized in that the deflecting rail (2, 20, 21, 22, 25, 200) is attached to a mounting element (4, 40) supported against the axle (65) of the pressure roller (3).
  11. The device according to any one of the claims 9 or 10, characterized in that the mounting element (4, 40) is supported freely rotatably on the axle of the pressure roller (65).
  12. The device according to any one or more of the claims 9 through 11, characterized in that the mounting element (4, 40) comprises flanges (41; 42) overlapping the pressure roller axis (65) by means of recesses (44).
  13. The device according to any one or more of the claims 9 through 12, characterized in that the mounting element (40) comprises stops (43) holding the mounting element (40) in the desired operating position.
  14. The device according to any one or more of the claims 9 through 13, characterized in that the apron covering (1, 10) is under tension from the flexural rigidity thereof when running across the deflecting rail (2, 20, 21, 22, 25, 200).
  15. The device according to any one or more of the claims 1 through 14, characterized in that the surface (27, 203) of the deflecting rail (2, 20, 21, 22, 25, 200) making contact with the apron covering (1) comprises a low-friction surface enhancing sliding.
EP07704107.7A 2006-03-08 2007-01-24 Wearing coating for delivery rollers of a drawing roller frame Not-in-force EP1991725B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006011128.1A DE102006011128B4 (en) 2006-03-08 2006-03-08 Roll stretching device
PCT/EP2007/050675 WO2007101742A1 (en) 2006-03-08 2007-01-24 Wearing coating for delivery rollers of a drawing roller frame

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EP1991725A1 EP1991725A1 (en) 2008-11-19
EP1991725B1 true EP1991725B1 (en) 2016-01-20

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US (1) US8099835B2 (en)
EP (1) EP1991725B1 (en)
JP (1) JP5112341B2 (en)
KR (1) KR101403802B1 (en)
CN (1) CN101395309B (en)
BR (1) BRPI0708749A2 (en)
DE (1) DE102006011128B4 (en)
WO (1) WO2007101742A1 (en)

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Publication number Priority date Publication date Assignee Title
US8650718B2 (en) * 2009-03-31 2014-02-18 Ozdilek Ev Tekstil Sanayi Ve Ticaret Anonim Sirketi In yarn production, apron cladding mechanism and method to the rollers coated with elastic material and found in the drafting and guiding zone, having shift structure and pre-tensioning mechanism
CN113388924B (en) * 2021-06-03 2022-05-13 东台市润生纺机专件有限公司 Combing machine roller

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE816069C (en) * 1950-03-08 1951-10-08 Deutscher Spinnereimaschb Ingo Drafting system for spinning machines
GB1115179A (en) * 1964-12-22 1968-05-29 Dayco Corp Textile fibre drafting apron
JPS5315182B2 (en) * 1974-04-19 1978-05-23
FR2445400A1 (en) 1978-12-28 1980-07-25 Dayco Corp Fibre reinforced polymeric drafting apron - with low stretchability and good roller tracking
JPS55106676U (en) * 1979-01-19 1980-07-25
DE4104249A1 (en) * 1991-02-13 1992-08-20 Stahlecker Fritz Drawing system for spinning machines - has two pressure rolls forming clamping lines with delivery roll and joined via rocker arm
CN1069783A (en) * 1991-08-27 1993-03-10 唐思德 Aprons pinning rings of textile machine
DE10008610A1 (en) * 2000-02-24 2001-08-30 Zinser Textilmaschinen Gmbh Sliver drawing unit has a condensing stage with a profiled shrouding facing the suction unit in a mounting with easy adjustment and which reduces the energy for the required suction to condense the sliver
DE10260025A1 (en) * 2002-12-19 2004-07-08 Deutsche Institute für Textil- und Faserforschung (DITF) Coating for drafting rollers
DE10348452B4 (en) 2003-10-17 2008-07-03 Deutsche Institute für Textil- und Faserforschung Stuttgart Drafting system with twin top rollers wrapped in aprons
JP2005179857A (en) * 2003-12-22 2005-07-07 Murata Mach Ltd Drafting device

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EP1991725A1 (en) 2008-11-19
US8099835B2 (en) 2012-01-24
JP2009529105A (en) 2009-08-13
KR101403802B1 (en) 2014-06-03
US20090144942A1 (en) 2009-06-11
KR20080102424A (en) 2008-11-25
CN101395309B (en) 2011-03-30
CN101395309A (en) 2009-03-25
DE102006011128B4 (en) 2016-04-28
BRPI0708749A2 (en) 2011-06-28
WO2007101742A1 (en) 2007-09-13
DE102006011128A1 (en) 2007-09-13
JP5112341B2 (en) 2013-01-09

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