EP2412852B1 - Drafting unit for a staple fibre roving and press roller device for the same - Google Patents
Drafting unit for a staple fibre roving and press roller device for the same Download PDFInfo
- Publication number
- EP2412852B1 EP2412852B1 EP11175134.3A EP11175134A EP2412852B1 EP 2412852 B1 EP2412852 B1 EP 2412852B1 EP 11175134 A EP11175134 A EP 11175134A EP 2412852 B1 EP2412852 B1 EP 2412852B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- dust guard
- axle
- cover
- holding fixture
- top roller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000000835 fiber Substances 0.000 title claims description 29
- 239000000428 dust Substances 0.000 claims description 49
- 230000015572 biosynthetic process Effects 0.000 claims 2
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000035508 accumulation Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000009420 retrofitting Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 241000209035 Ilex Species 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000009760 functional impairment Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
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
- D01H5/70—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
- D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
- D01H5/60—Arrangements maintaining drafting elements free of fibre accumulations
Definitions
- the invention relates to a drafting system for warping a staple fiber strand with at least two drivable lower rollers and upper rollers which can be pressed thereon and with a holding body for holding at least one of the upper rollers, an axle mounted on the holding body and at least one sleeve rotatably mounted on the axle with a rubber-elastic spaced from the holding body Reference contains.
- the invention further relates to a printing roll unit for a drafting arrangement distorting a staple fiber structure with a holding body and having an axis fixed to the holding body and at least one sleeve rotatably mounted on the axis, wherein on the sleeve a rubber-elastic cover spaced from the holding body is arranged.
- Fiber and dust deposits can impair the functioning of drafting systems and pressure roller assemblies and necessitate regular cleaning and maintenance.
- US-A-2,948,024 and CN-Y-2 135 581 show sleeves, which are arranged on axles and fixed in the assembled state. They act accordingly as an enlarged diameter diameter axis.
- Object of the present invention is therefore to reduce the susceptibility of drafting and pressure roller assemblies of the type mentioned for fiber and dust deposits.
- the object is achieved in that the outer circumference of the axis over the entire length between the cover and the holding body of a Dust cover is enclosed and the dust cover is rotatable together with the sleeve.
- the dust cover is rotatable together with the sleeve.
- the dust protection thereby has a moving surface in the operating state, the dirt deposits further reduced.
- the dust cover is rotatably connected to the sleeve and / or the cover and is thus rotatable together with the sleeve freely rotatably mounted on the axis. It is particularly advantageous if the dust cover extends from the cover into the holding body. As a result, dirt deposits on the axle are particularly effectively avoided.
- the dust protection on the drafting system or on the pressure roller unit can be formed differently.
- the cover carrying the cover form the dust cover.
- the sleeve preferably extends from the cover into the holding body. So it is compared to the state of Technique provided an extended sleeve.
- the outer circumference of the sleeve between the holding body and cover forms a freely accessible from the outside surface, which moves in the operating state.
- the axis lies inside the sleeve and in the holding body and is thereby covered. This embodiment has the advantage that no additional parts must be provided on the top roller for dust protection.
- the dust protection by a component that connects to the sleeve.
- the adjoining the sleeve component may be attached to the sleeve and / or the cover.
- a complete coverage of the axis in the region between the holding body and the rubber-elastic cover can also be achieved.
- the cover of a different material than the metal sleeve, for example made of plastic can be performed, which also allows easy retrofitting of existing facilities.
- the dust cover comprises a component which is designed annular, sleeve-shaped or half-shell-shaped. This has the advantage that the component can be easily attached to the sleeve, for example by pressing, clamping or clipping.
- the dust cover is particularly advantageous when it is arranged on a top roller forming a swirl stop, which can be arranged in the transport direction of the staple fiber assembly downstream of a compressor for a finished distorted fiber structure.
- a reduction in dust and fiber landing deposits achieved by the cover has a very positive effect on improved operational safety.
- a relatively narrow reference is used, so that thereby the distance between the holding body and the cover is relatively large.
- a relatively narrow reference is advantageous in spin-stop rolls, so that despite a relatively low pressure force, a sufficiently high specific pressure can be exerted on the fiber bond to be clamped and the function as Spin stop is achieved.
- the lowest possible pressure force of the twist stop roller is advantageous in order to minimize the losses due to friction and flexing work.
- the gap extends at least in the externally accessible area in the axial direction.
- the holding body includes a region with a concave cylindrical surface which surrounds a part of the outer periphery of the dust cover to form a gap.
- the concave cylindrical surface prevents fibers or fiber fragments from being drawn into the gap between the holding body and the dust guard by the dust protection rotating during operation and leading to a blockage of the top roller. It is expedient for the concave cylindrical surface to surround at least one part of the outer circumference of the dust protection which lies on the side facing away from the lower roller.
- the sealing of a rotatable with the sleeve dust cover to the holding body can be further improved if the holding body has a paragraph, which forms seen in axial section with a curved or kinked gap extending with the dust cover.
- the heel is preferably step-shaped or shoulder-shaped, so that a kinked gap is created between the holding body and the dust guard.
- a non-linear gap reduces the risk of fibers accumulating in the nip leading to blockage of the top roll.
- a pressure roller assembly is an independently tradable assembly that is often sold separately for retrofitting existing drafting equipment. When inserted into the drafting system, the pressure roller assembly is attached to a load carrier of the drafting system.
- the printing roll unit consists of a holding body and two top rollers. Prefers the upper rollers are designed as Druckwalzenzwillinge.
- the pressure roller assembly preferably contains at least one pair of pressure rollers with two sleeves rotatably mounted on the axle, on each of which a rubber-elastic reference is arranged, wherein between one of the covers and the holding body, a dust cover enclosing the axis is provided, which is rotatable about the axis. It can be used for two adjacent drafting systems.
- the first pair of pressure rollers contains the output top rollers for the drafting system, at the terminal line to be formed with the lower roller, the distortion of the staple fiber strand is completed.
- the second twin pressure roll contains the twist stop rolls.
- the printing roll unit may further include compressors, wherein at least one compressor with a tunnel-shaped compression channel is arranged between the output top roll and the spiral stop roll.
- the pressure roller unit can be placed on a lower roller, namely the output lower roller. When placing the Druckwatzenaggregats on the lower roller and the compressor can also sit on the lower roller.
- a drafting system 1 which contains two pairs of rollers 2 and 3.
- the pair of rollers 2 includes a drivable lower roller 4 and an upper roller 5 pressed thereon.
- the roller pair 3 contains a drivable Lower roller 6 and an upper roller 7 that can be pressed against it.
- the upper rollers 5, 7 are not driven, can rotate freely and thus run with them when placed on the respective lower roller 4, 6.
- the roller pairs 2 and 3 of the drafting system 1 transport a staple fiber strand 8 in the transport direction A and distort it to a desired fineness.
- the lower roller 6 is driven at a greater peripheral speed than the lower roller 4.
- the pair of rollers 2 may be preceded by further pairs of rollers.
- the rollers 4 and 5 of the roller pair 2 are assigned in a conventional manner guide straps 9.
- the ceremoniessriemchen 9 lead the fiber structure 8 in the main drafting zone of the drafting system. 1
- the pair of rollers 3 is referred to as output roller pair of the drafting system 1.
- the distortion of the staple fiber strand 8 is completed.
- the finished distorted fiber composite in withdrawal direction B is fed to a twisting element (not shown), for example a ring spindle, where it is twisted to form a thread 14.
- the upper roller 13 performs the function of a swirl stop roller and prevents the rotation of the thread 14 in the compression zone where the compressor 11 is running back.
- the upper rollers 7 and 13 each contain an axis 15 and 16.
- the axes 15 and 16 are held by a holding body 17.
- the holding body 17 is part of a pressure roller assembly.
- the present pressure roller assembly 18 includes the holding body 17 and the two top rollers 7 and 13. It may also contain the compressor 11 next.
- the printing roll unit 18 is used as a preassembled module in the drafting system 1 and attached in a manner not shown to a load carrier of the drafting system 1, which presses the upper rollers 7 and 13 against the lower roller 6.
- the upper rollers 7 and 13 are formed as Druckwalzenzwillinge.
- FIG. 2 The design of the upper roller 13 as Druckwalzenzwilling is in FIG. 2 shown in more detail. It can be seen that the axis 16 of the top roller 13 is accommodated in the holding body 17 of the pressure roller assembly 18. The axis 16 protrudes with both ends of the holding body 17. On each of the ends of a sleeve 19 is mounted freely rotatable. On each of the sleeves 19, a rubber-elastic cover 20 is attached.
- the rubber-elastic cover 20 may include a non-detachably connected to the rubber-elastic material of the cover sleeve which is pressed onto the sleeve 19.
- the mounting of the sleeve 19 on the axis 16 is shown only schematically and takes place in a conventional manner via two rows of balls. Of course, not shown sealing means are provided to seal the storage to the outside.
- FIG. 2 it can be seen that the cover 20 is spaced from the holding body 17.
- the area between the cover 20 and the holding body 17 is designated by the reference numeral 21.
- the axis 16 is exposed in the region 21 and fiber fly accumulations can occur there.
- a dust guard 22 is provided in the region 21, which encloses the outer circumference of the axis 16 in the region 21 between the cover 20 and the holding body 17.
- the dust cover 22 is formed by the sleeve 19.
- the sleeve 19 extends from the cover 20 into the holding body 17.
- the outer circumference of the axis 16 is on the entire length between reference 20 and holding body 17 covered, so that dirt deposits are prevented there.
- the sleeve 19 may also be formed shorter than shown, that is not extended compared to the prior art, so that it is not substantially longer than the reference 20.
- an additional component may be provided, which is attached to the sleeve 19, for example a ring by pressing, and thereby forms the dust cover 22.
- the holding body 17 includes a portion 24 having a concave cylindrical surface which surrounds a portion of the outer periphery of the rotatable dust guard 22 to form a gap 23.
- the region 24 is arranged such that the concave cylindrical surface surrounds at least one part of the outer circumference of the dust protection 22 lying on the side of the axis 16 remote from the lower roller 6.
- the holding body 17 also has a shoulder 25 which - in the axial section of FIG. 2 seen - forms a kinked gap 23 with the dust cover 22.
- a surface is defined on the holding body 17, which faces the axial end surface of the dust cover 22 and the sleeve 19.
- the kinked gap 23 formed by the region 24 and the shoulder 25 very effectively prevents blocking of the sleeve 19 by fiber fly.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Description
Die Erfindung betrifft ein Streckwerk zum Verziehen eines Stapelfaserverbandes mit wenigstens zwei antreibbaren Unterwalzen und daran andrückbaren Oberwalzen sowie mit einem Haltekörper zum Halten wenigstens einer der Oberwalzen, die eine am Haltekörper befestigte Achse und zumindest eine rotierbar auf der Achse gelagerte Hülse mit einem vom Haltekörper beabstandeten gummielastischen Bezug enthält. Die Erfindung betrifft ferner ein Druckwalzenaggregat für ein einen Stapelfaserverband verziehendes Streckwerk mit einem Haltekörper und zumindest einer Oberwalze, die eine am Haltekörper befestigte Achse und zumindest eine rotierbar auf der Achse gelagerte Hülse aufweist, wobei auf der Hülse ein vom Haltekörper beabstandeter gummielastischer Bezug angeordnet ist.The invention relates to a drafting system for warping a staple fiber strand with at least two drivable lower rollers and upper rollers which can be pressed thereon and with a holding body for holding at least one of the upper rollers, an axle mounted on the holding body and at least one sleeve rotatably mounted on the axle with a rubber-elastic spaced from the holding body Reference contains. The invention further relates to a printing roll unit for a drafting arrangement distorting a staple fiber structure with a holding body and having an axis fixed to the holding body and at least one sleeve rotatably mounted on the axis, wherein on the sleeve a rubber-elastic cover spaced from the holding body is arranged.
Ein ständiges Problem in Spinnereibetrieben sind Faserflug und Staubentwicklung. Faser- und Staubablagerungen können die Funktionsfähigkeit von Streckwerken und Druckwalzenaggregaten beeinträchtigen und machen eine regelmäßige Reinigung und Wartung erforderlich.A constant problem in spinning mills is fiber fly and dust. Fiber and dust deposits can impair the functioning of drafting systems and pressure roller assemblies and necessitate regular cleaning and maintenance.
Die Druckschriften
Aufgabe der vorliegenden Erfindung ist es deshalb, eine Anfälligkeit von Streckwerken und Druckwalzenaggregaten der eingangs genannten Art für Faser- und Staubablagerungen zu reduzieren.Object of the present invention is therefore to reduce the susceptibility of drafting and pressure roller assemblies of the type mentioned for fiber and dust deposits.
Die Aufgabe wird dadurch gelöst, dass der Außenumfang der Achse auf der gesamten Länge zwischen dem Bezug und dem Haltekörper von einem Staubschutz umschlossen ist und der Staubschutz zusammen mit der Hülse rotierbar ist.The object is achieved in that the outer circumference of the axis over the entire length between the cover and the holding body of a Dust cover is enclosed and the dust cover is rotatable together with the sleeve.
Für derartige Streckwerke bzw. Druckwalzenaggregate sind Oberwalzen bekannt, bei denen die Hülse auf dem größten Teil ihrer Breite von einem gummielastischen Bezug bedeckt ist. Die Hülse ist dadurch praktisch genauso weit vom Haltekörper beabstandet wie der Bezug. Die Achse ist zwischen Haltekörper und dem von der Hülse umschlossenen Bereich, also praktisch im gesamten Bereich zwischen Haltekörper und dem Bezug, freiliegend und von außen zugänglich. Es kommt häufig vor, dass sich an der freiliegenden Achse zwischen Haltekörper und Hülse Faserflug und Staub ansammelt, der zu Funktionsbeeinträchtigung führen kann.For such drafting or pressure roller assemblies upper rollers are known in which the sleeve is covered over most of its width by a rubber-elastic cover. The sleeve is thus spaced practically as far from the holding body as the cover. The axis is between the holding body and the area enclosed by the sleeve area, so practically in the entire area between the holding body and the cover, exposed and accessible from the outside. It often happens that on the exposed axis between the holding body and sleeve fiber fly and dust accumulates, which can lead to functional impairment.
Es hat sich überraschend gezeigt, dass sich durch einen die Achse umschließenden Staubschutz die Schmutzansammlungen aus Staub und Faserflug in diesem Bereich des Streckwerks sehr stark verringern lassen. Die Achse zwischen dem Haltekörper und dem elastischen Bezug wird vollständig abgedeckt.It has surprisingly been found that the dirt accumulations of dust and fiber fly can be greatly reduced in this area of the drafting system by a dust cover enclosing the axle. The axis between the holding body and the elastic cover is completely covered.
Erfindungsgemäß ist der Staubschutz zusammen mit der Hülse rotierbar ausgeführt. Der Staubschutz weist dadurch eine sich im Betriebszustand bewegende Oberfläche auf, die Schmutzanlagerungen weiter verringert. Der Staubschutz ist drehfest mit der Hülse und/oder dem Bezug verbunden und ist somit zusammen mit der frei drehbar auf der Achse gelagerten Hülse rotierbar. Besonders vorteilhaft ist es, wenn sich der Staubschutz vom Bezug bis in den Haltekörper hinein erstreckt. Hierdurch werden Schmutzanlagerungen an der Achse besonders wirkungsvoll vermieden.According to the invention, the dust cover is rotatable together with the sleeve. The dust protection thereby has a moving surface in the operating state, the dirt deposits further reduced. The dust cover is rotatably connected to the sleeve and / or the cover and is thus rotatable together with the sleeve freely rotatably mounted on the axis. It is particularly advantageous if the dust cover extends from the cover into the holding body. As a result, dirt deposits on the axle are particularly effectively avoided.
Der Staubschutz am Streckwerk oder am Druckwalzenaggregat kann unterschiedlich gebildet werden. Beispielsweise kann die den Bezug tragende Hülse den Staubschutz bilden. Dabei erstreckt sich die Hülse bevorzugt vom Bezug bis in den Haltekörper hinein. Es ist also im Vergleich zum Stand der Technik eine verlängerte Hülse vorgesehen. Bei dieser Ausführung bildet der Außenumfang der Hülse zwischen Haltekörper und Bezug eine von außen frei zugängliche Oberfläche, die sich im Betriebszustand bewegt. Die Achse liegt im Inneren der Hülse und im Haltekörper und ist dadurch abgedeckt. Diese Ausgestaltung hat den Vorteil, dass für den Staubschutz keine zusätzlichen Teile an der Oberwalze vorgesehen werden müssen.The dust protection on the drafting system or on the pressure roller unit can be formed differently. For example, the cover carrying the cover form the dust cover. In this case, the sleeve preferably extends from the cover into the holding body. So it is compared to the state of Technique provided an extended sleeve. In this embodiment, the outer circumference of the sleeve between the holding body and cover forms a freely accessible from the outside surface, which moves in the operating state. The axis lies inside the sleeve and in the holding body and is thereby covered. This embodiment has the advantage that no additional parts must be provided on the top roller for dust protection.
Möglich ist es aber auch, den Staubschutz durch ein Bauteil auszubilden, das an die Hülse anschließt. Das an die Hülse anschließende Bauteil kann an der Hülse und/oder dem Bezug befestigt sein. Auf diese Weise kann ebenfalls eine vollständige Abdeckung der Achse im Bereich zwischen dem Haltekörper und dem gummielastischen Bezug erreicht werden. Diese Ausgestaltung hat den Vorteil, dass die Abdeckung aus einem anderen Material als die metallene Hülse, beispielsweise aus Kunststoff, ausgeführt werden kann, was auch eine leichte Nachrüstung bestehender Anlagen ermöglicht. Bevorzugt enthält der Staubschutz ein Bauteil, das ringförmig, hülsenförmig oder halbschalenförmig gestaltet ist. Dies hat den Vorteil, dass sich das Bauteil sehr leicht an der Hülse, beispielsweise durch Aufpressen, Aufklemmen oder Aufklipsen, befestigen lässt.But it is also possible to form the dust protection by a component that connects to the sleeve. The adjoining the sleeve component may be attached to the sleeve and / or the cover. In this way, a complete coverage of the axis in the region between the holding body and the rubber-elastic cover can also be achieved. This embodiment has the advantage that the cover of a different material than the metal sleeve, for example made of plastic, can be performed, which also allows easy retrofitting of existing facilities. Preferably, the dust cover comprises a component which is designed annular, sleeve-shaped or half-shell-shaped. This has the advantage that the component can be easily attached to the sleeve, for example by pressing, clamping or clipping.
Der Staubschutz ist besonders vorteilhaft, wenn er an einer einen Drallstopp bildenden Oberwalze angeordnet ist, die in Transportrichtung des Stapelfaserverbandes stromabwärts von einem Verdichter für einen fertig verzogenen Faserverband anordenbar ist. Insbesondere bei einer solchen einem Verdichter nachfolgenden Drallstoppwalze wirkt sich eine durch die Abdeckung erreichte Verminderung von Staub- und Faserfluganlagerungen sehr positiv auf eine verbesserte Betriebssicherheit aus. Dies liegt u. a. auch daran, dass bei diesen Drallstoppwalzen ein relativ schmaler Bezug verwendet wird, so dass dadurch der Abstand zwischen Haltekörper und Bezug relativ groß ist. Ein relativ schmaler Bezug ist bei Drallstoppwalzen vorteilhaft, damit trotz relativ geringer Andruckkraft ein ausreichend hoher spezifischer Druck auf den zu klemmenden Faserverband ausgeübt werden kann und die Funktion als Drallstopp erreicht wird. Eine möglichst geringe Andruckkraft der Drallstoppwalze ist vorteilhaft, um die auftretenden Verluste durch Reibung und Walkarbeit möglichst gering zu halten.The dust cover is particularly advantageous when it is arranged on a top roller forming a swirl stop, which can be arranged in the transport direction of the staple fiber assembly downstream of a compressor for a finished distorted fiber structure. In particular, in such a compressor following a swirl stop roller, a reduction in dust and fiber landing deposits achieved by the cover has a very positive effect on improved operational safety. This is partly due to the fact that in these spin stop rollers, a relatively narrow reference is used, so that thereby the distance between the holding body and the cover is relatively large. A relatively narrow reference is advantageous in spin-stop rolls, so that despite a relatively low pressure force, a sufficiently high specific pressure can be exerted on the fiber bond to be clamped and the function as Spin stop is achieved. The lowest possible pressure force of the twist stop roller is advantageous in order to minimize the losses due to friction and flexing work.
In weiterer Ausgestaltung der Erfindung kann es vorteilhaft sein, wenn zwischen dem Haltekörper und dem Staubschutz ein von außen in radialer Richtung der Achse unzugänglicher Spalt angeordnet ist. Bevorzugt erstreckt sich der Spalt wenigstens in dem von außen zugänglichen Bereich in Achsrichtung. Insbesondere ist es vorteilhaft, wenn der Haltekörper einen Bereich mit einer konkaven zylindrischen Fläche enthält, die einen Teil des Außenumfangs des Staubschutzes unter Bildung eines Spaltes umgibt. Durch eine derartige Ausgestaltung wird verhindert, dass Fasern oder Faserbruchstücke durch den im Betrieb rotierenden Staubschutz in den Spalt zwischen Haltekörper und Staubschutz hineingezogen werden und zu einer Blockierung der Oberwalze führen. Es ist günstig, wenn die konkave zylindrische Fläche zumindest einen auf der von der Unterwalze abgewandten Seite liegenden Teil des Außenumfangs des Staubschutzes umgibt.In a further embodiment of the invention, it may be advantageous if between the holding body and the dust cover from the outside in the radial direction of the axis inaccessible gap is arranged. Preferably, the gap extends at least in the externally accessible area in the axial direction. In particular, it is advantageous if the holding body includes a region with a concave cylindrical surface which surrounds a part of the outer periphery of the dust cover to form a gap. Such a configuration prevents fibers or fiber fragments from being drawn into the gap between the holding body and the dust guard by the dust protection rotating during operation and leading to a blockage of the top roller. It is expedient for the concave cylindrical surface to surround at least one part of the outer circumference of the dust protection which lies on the side facing away from the lower roller.
Die Abdichtung eines mit der Hülse rotierbaren Staubschutzes zu dem Haltekörper kann weiter verbessert werden, wenn der Haltekörper einen Absatz aufweist, der mit dem Staubschutz einen im Axialschnitt gesehen gekrümmt oder geknickt verlaufenden Spalt bildet. Der Absatz ist bevorzugt stufenförmig oder schulterförmig, so dass zwischen Haltekörper und Staubschutz ein geknickter Spalt entsteht. Ein nicht geradlinig verlaufender Spalt verringert die Gefahr, dass sich Fasern im Spalt ansammeln und zu einer Blockierung der Oberwalze führen.The sealing of a rotatable with the sleeve dust cover to the holding body can be further improved if the holding body has a paragraph, which forms seen in axial section with a curved or kinked gap extending with the dust cover. The heel is preferably step-shaped or shoulder-shaped, so that a kinked gap is created between the holding body and the dust guard. A non-linear gap reduces the risk of fibers accumulating in the nip leading to blockage of the top roll.
Ein Druckwalzenaggregat stellt eine selbstständig handelbare Baugruppe dar, die oftmals zur Nachrüstung von bestehenden Streckwerken separat verkauft wird. Beim Einsetzen in das Streckwerk wird das Druckwalzenaggregat an einem Belastungsträger des Streckwerks angebracht. Das Druckwalzenaggregat besteht aus einem Haltekörper und zwei Oberwalzen. Bevorzugt sind die Oberwalzen als Druckwalzenzwillinge ausgeführt. Das Druckwalzenaggregat enthält bevorzugt zumindest einen Druckwalzenzwilling mit zwei rotierbar auf der Achse gelagerten Hülsen, auf denen jeweils ein gummielastischer Bezug angeordnet ist, wobei zwischen einem der Bezüge und dem Haltekörper ein die Achse umschließender Staubschutz vorgesehen ist, der um die Achse rotierbar ist. Es kann für zwei benachbarte Streckwerke eingesetzt werden. Der erste Druckwalzenzwilling enthält die Ausgangsoberwalzen für das Streckwerk, an deren mit der Unterwalze zu bildenden Klemmlinie der Verzug des Stapelfaserverbandes beendet ist. Der zweite Druckwalzenzwilling enthält die Drallstoppwalzen. Das Druckwalzenaggregat kann ferner Verdichter enthalten, wobei zumindest ein Verdichter mit einem tunnelförmigen Verdichtungskanal zwischen Ausgangsoberwalze und Drallstoppwalze angeordnet ist. Das Druckwalzenaggregat ist auf eine Unterwalze, nämlich die Ausgangsunterwalze, aufsetzbar. Beim Aufsetzen des Druckwatzenaggregats auf die Unterwalze kann sich auch der Verdichter auf die Unterwalze aufsetzen.A pressure roller assembly is an independently tradable assembly that is often sold separately for retrofitting existing drafting equipment. When inserted into the drafting system, the pressure roller assembly is attached to a load carrier of the drafting system. The printing roll unit consists of a holding body and two top rollers. Prefers the upper rollers are designed as Druckwalzenzwillinge. The pressure roller assembly preferably contains at least one pair of pressure rollers with two sleeves rotatably mounted on the axle, on each of which a rubber-elastic reference is arranged, wherein between one of the covers and the holding body, a dust cover enclosing the axis is provided, which is rotatable about the axis. It can be used for two adjacent drafting systems. The first pair of pressure rollers contains the output top rollers for the drafting system, at the terminal line to be formed with the lower roller, the distortion of the staple fiber strand is completed. The second twin pressure roll contains the twist stop rolls. The printing roll unit may further include compressors, wherein at least one compressor with a tunnel-shaped compression channel is arranged between the output top roll and the spiral stop roll. The pressure roller unit can be placed on a lower roller, namely the output lower roller. When placing the Druckwatzenaggregats on the lower roller and the compressor can also sit on the lower roller.
Weitere Vorteile und Merkmale der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels in Verbindung mit den Figuren.Further advantages and features of the invention will become apparent from the following description of an embodiment in conjunction with the figures.
Es zeigen:
- Figur 1
- eine schematisch dargestellte Seitenansicht eines Streckwerks mit einem Druckwalzenaggregat, und
-
Figur 2 - eine entlang der Schnittfläche II-II der
Figur 1 geschnittene und vergrößert dargestellte Oberwalze des Streckwerks.
- FIG. 1
- a schematically illustrated side view of a drafting system with a pressure roller assembly, and
- FIG. 2
- one along the section II-II of
FIG. 1 cut and enlarged illustrated upper roller of the drafting system.
In
Das Walzenpaar 3 wird als Ausgangswalzenpaar des Streckwerks 1 bezeichnet. An der Klemmlinie 10 zwischen der Ausgangsunterwalze 6 und der Ausgangsoberwalze 7 ist der Verzug des Stapelfaserverbandes 8 beendet. Dort liegt ein fertig verzogener Faserverband vor, der aufliegend auf den Außenumfang der Ausgangsunterwalze 6 zu einem Verdichter 11 mit einem Verdichtungskanal und nachfolgend zu einer Klemmlinie 12 zwischen der Ausgangsunterwalze 6 und einer Oberwalze 13 transportiert wird. Im Anschluss an die Klemmlinie 12 wird der fertig verzogene Faserverbund in Abzugsrichtung B einem nicht dargestellten Drallorgan, beispielsweise einer Ringspindel, zugeführt und dort zu einem Faden 14 verdreht. Die Oberwalze 13 übt die Funktion einer Drallstoppwalze aus und verhindert, dass die Drehung des Fadens 14 in die Verdichtungszone, wo sich der Verdichter 11 befindet, zurückläuft.The pair of rollers 3 is referred to as output roller pair of the drafting system 1. At the
Die Oberwalzen 7 und 13 enthalten jeweils eine Achse 15 und 16. Die Achsen 15 und 16 werden von einem Haltekörper 17 gehalten. Der Haltekörper 17 ist Teil eines Druckwalzenaggregats. Das hier vorliegende Druckwalzenaggregat 18 enthält den Haltekörper 17 und die beiden Oberwalzen 7 und 13. Es kann daneben auch den Verdichter 11 enthalten. Das Druckwalzenaggregat 18 wird als vormontierte Baugruppe in das Streckwerk 1 eingesetzt und dabei in nicht dargestellter Weise an einem Belastungsträger des Streckwerks 1 angebracht, der die Oberwalzen 7 und 13 gegen die Unterwalze 6 andrückt. Die Oberwalzen 7 und 13 sind als Druckwalzenzwillinge ausgebildet.The
Die Ausgestaltung der Oberwalze 13 als Druckwalzenzwilling ist in
In
Erfindungsgemäß ist im Bereich 21 ein Staubschutz 22 vorgesehen, der den Außenumfang der Achse 16 in dem Bereich 21 zwischen dem Bezug 20 und dem Haltekörper 17 umschließt. Bei dem hier dargestellten Ausführungsbeispiel wird der Staubschutz 22 durch die Hülse 19 gebildet. Die Hülse 19 erstreckt sich vom Bezug 20 bis in den Haltekörper 17 hinein. Der Außenumfang der Achse 16 ist auf der gesamten Länge zwischen Bezug 20 und Haltekörper 17 abgedeckt, so dass Schmutzanlagerungen dort verhindert werden.According to the invention, a
Bei einer alternativen, nicht dargestellten Ausgestaltung, kann die Hülse 19 auch kürzer als dargestellt ausgebildet sein, also im Vergleich zum Stand der Technik nicht verlängert, so dass sie nicht wesentlich länger als der Bezug 20 ist. In diesem Fall kann ein zusätzliches Bauteil vorgesehen sein, das an der Hülse 19 befestigt wird, beispielsweise ein Ring durch Aufpressen, und das dadurch den Staubschutz 22 bildet.In an alternative, not shown embodiment, the
Zwischen dem Haltekörper 17 und dem Staubschutz 22 ist ein von außen in radialer Richtung der Achse 16 unzugänglicher Spalt 23 angeordnet. In dem von außen zugänglichen Bereich erstreckt sich der Spalt 23 in Achsrichtung der Achse 16. Hierdurch wird verhindert, dass Fasern durch den rotierenden Staubschutz 22 in den Spalt 23 hineingezogen werden. Es ist vorgesehen, dass der Haltekörper 17 einen Bereich 24 mit einer konkaven zylindrischen Fläche enthält, die einen Teil des Außenumfangs des rotierbaren Staubschutzes 22 unter Bildung eines Spaltes 23 umgibt. Der Bereich 24 ist so angeordnet, dass die konkave zylindrische Fläche zumindest einen auf der von der Unterwalze 6 abgewandten Seite der Achse 16 liegenden Teil des Außenumfangs des Staubschutzes 22 umgibt.Between the holding
Der Haltekörper 17 weist außerdem einen Absatz 25 auf, der - im Axialschnitt der
Selbstverständlich kann alternativ oder zusätzlich auch eine andere Oberwalze 5, 7 des Streckwerks 1 entsprechend der in
- 1
- Streckwerk
- 2
- Walzenpaar
- 3
- Ausgangswalzenpaar
- 4
- Unterwalze
- 5
- Oberwalze
- 6
- Ausgangsunterwalze
- 7
- Ausgangsoberwalze
- 8
- Stapelfaserverband
- 9
- Führungsriemchen
- 10
- Klemmlinie
- 11
- Verdichter
- 12
- Klemmlinie
- 13
- Drallstoppoberwalze
- 14
- Faden
- 15
- Achse
- 16
- Achse
- 17
- Haltekörper
- 18
- Druckwalzenaggregat
- 19
- Hülse
- 20
- Bezug
- 21
- Bereich
- 22
- Staubschutz
- 23
- Spalt
- 24
- Bereich
- 25
- Absatz
- A
- Transportrichtung
- B
- Abzugsrichtung
- 1
- drafting system
- 2
- roller pair
- 3
- Roller pair
- 4
- bottom roll
- 5
- top roll
- 6
- Bottom rollers
- 7
- Output top roll
- 8th
- Staple fiber strand
- 9
- Führungsriemchen
- 10
- clamping line
- 11
- compressor
- 12
- clamping line
- 13
- Twist stop top roller
- 14
- thread
- 15
- axis
- 16
- axis
- 17
- holding body
- 18
- Pressure roller unit
- 19
- shell
- 20
- reference
- 21
- Area
- 22
- dust
- 23
- gap
- 24
- Area
- 25
- paragraph
- A
- transport direction
- B
- withdrawal direction
Claims (9)
- A top roller aggregate (18) for a drafting unit (1) drafting a staple fibre strand (8) having at least one top roller (13) which comprises an axle (16) fixed to a holding fixture (17), and at least one tube (19) rotatably mounted on the axle (16), and a flexible rubber-like cover (20) at a distance to the holding fixture (17) is arranged on the tube (19), the outer circumference of the axle (16) being surrounded on its entire length between the cover (20) and the holding fixture (17) by a dust guard (22), characterized in that the dust guard (22) is rotatable about the axle (16).
- Top roller aggregate according to claim 1, characterized in that the dust guard (22) extends from the cover (20) into the holding fixture (17).
- Top roller aggregate according to any one of the claims 1 to 2, characterized in that the tube (19) forms the dust guard (22).
- Top roller aggregate according to any one of the claims 1 to 2, characterized in that at least one component adjoining the tube (19) forms the dust guard (22).
- Top roller aggregate according to any one of the claims 1 to 4, characterized in that the holding fixture (17) comprises an area (24) having a concave, cylindrical surface, which surrounds a part of the outer circumference of the dust guard (22) with the formation of a gap (23).
- Top roller aggregate according to any one of the claims 1 to 5, characterized in that the holding fixture (17) comprises a projection (25), which forms a gap (23) with the dust guard (22), said gap (23) extending in a curve or bend as seen in axial section.
- A drafting unit (1) for drafting a staple fibre strand (8) comprising at least two driveable bottom rollers (4, 6) and top rollers (5, 7, 13) pressable on said bottom rollers (4, 6), also comprising a holding fixture (17) for holding at least one of the top rollers (7; 13) which contains an axle (15; 16) fixed to the holding fixture (17) and at least one tube (19) rotatably mounted on the axle (16), said tube (19) comprising a flexible rubber-like cover (20) at a distance to the holding fixture (17), the outer circumference of the axle (16) being surrounded on its entire length between the cover (20) and the holding fixture (17) by a dust guard (22), characterized in that the dust guard (22) is rotatable about the axle (16).
- A drafting unit according to claim 7, characterized in that the dust guard (22) is arranged to a top roller (13) taking the form of a twist stop, said top roller (13) being arranged in transport direction (A) of the staple fibre strand (8) downstream of a condenser (11) for a ready drafted fibre strand.
- Drafting unit according to claim 7 or 8, characterized in that the holding fixture (17) comprises an area (24) having a concave cylindrical surface, which surrounds, with formation of a gap (23), at least one part of the outer circumference of the dust guard (22) disposed on the side of the axle (16) facing away from the bottom roller (6).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010032341A DE102010032341A1 (en) | 2010-07-27 | 2010-07-27 | Drafting system for a staple fiber bandage and pressure roller unit therefor |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2412852A2 EP2412852A2 (en) | 2012-02-01 |
EP2412852A3 EP2412852A3 (en) | 2015-03-04 |
EP2412852B1 true EP2412852B1 (en) | 2016-09-14 |
Family
ID=44512674
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11175134.3A Active EP2412852B1 (en) | 2010-07-27 | 2011-07-25 | Drafting unit for a staple fibre roving and press roller device for the same |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2412852B1 (en) |
CN (1) | CN102345191B (en) |
BR (1) | BRPI1103174B1 (en) |
DE (1) | DE102010032341A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH713916A1 (en) * | 2017-06-23 | 2018-12-28 | Rieter Ag Maschf | Compression device for a spinning machine. |
JP7180333B2 (en) * | 2018-12-04 | 2022-11-30 | 株式会社豊田自動織機 | Spinning machine fiber bundle concentrator |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB724483A (en) * | 1953-05-12 | 1955-02-23 | Textile Engineering Corp | Improvements in and relating to top rolls for spinning and roving frames |
DE970370C (en) * | 1950-05-30 | 1958-09-11 | Skf Kugellagerfabriken Gmbh | Top rollers for spinning machines |
US2948024A (en) * | 1956-06-29 | 1960-08-09 | Kenneth P Swanson | Lint sealing assembly for textile drafting rolls |
DE1164288B (en) * | 1961-08-01 | 1964-02-27 | Skf Kugellagerfabriken Gmbh | Top roller for spinning machine drafting units |
CN2135581Y (en) * | 1992-05-27 | 1993-06-09 | 李瑶兴 | Winding-proof roller |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3228088A (en) * | 1963-05-24 | 1966-01-11 | Ind Schacfiler | Upper roller for spinning machine drawing mechanisms |
CH680594A5 (en) * | 1989-09-08 | 1992-09-30 | Rieter Ag Maschf | Bearings for roller - has tubular cover over the journals and bearings extending into gap in the roller to exclude dust and fly |
DE10019636A1 (en) * | 2000-04-19 | 2001-10-25 | Temco Textilmaschkomponent | Press roller has a rotating cladded mantle around a fixed axis with a bearing geometry for the mantle at the axis to allow a swing movement on one plane without wear |
JP2003041440A (en) * | 2001-07-25 | 2003-02-13 | Nippon Boseki Yohin Kenkyusho:Kk | Top roller |
DE10159048A1 (en) * | 2001-11-30 | 2003-06-18 | Rieter Ag Maschf | Sliver drawing unit at a ring spinning station for drawing and condensing the sliver has a twist block at the end of condensing zone with a camber mantle compressed under loading into a straight line at the condensing roller |
CN2622207Y (en) * | 2003-06-04 | 2004-06-30 | 上海市纺织机械研究所 | Roller assembly of gather type spinning device having dust-proof frame |
-
2010
- 2010-07-27 DE DE102010032341A patent/DE102010032341A1/en not_active Withdrawn
-
2011
- 2011-07-22 CN CN201110206960.XA patent/CN102345191B/en active Active
- 2011-07-22 BR BRPI1103174A patent/BRPI1103174B1/en not_active IP Right Cessation
- 2011-07-25 EP EP11175134.3A patent/EP2412852B1/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE970370C (en) * | 1950-05-30 | 1958-09-11 | Skf Kugellagerfabriken Gmbh | Top rollers for spinning machines |
GB724483A (en) * | 1953-05-12 | 1955-02-23 | Textile Engineering Corp | Improvements in and relating to top rolls for spinning and roving frames |
US2948024A (en) * | 1956-06-29 | 1960-08-09 | Kenneth P Swanson | Lint sealing assembly for textile drafting rolls |
DE1164288B (en) * | 1961-08-01 | 1964-02-27 | Skf Kugellagerfabriken Gmbh | Top roller for spinning machine drafting units |
CN2135581Y (en) * | 1992-05-27 | 1993-06-09 | 李瑶兴 | Winding-proof roller |
Also Published As
Publication number | Publication date |
---|---|
BRPI1103174A2 (en) | 2012-12-11 |
EP2412852A2 (en) | 2012-02-01 |
EP2412852A3 (en) | 2015-03-04 |
DE102010032341A1 (en) | 2012-02-02 |
CN102345191A (en) | 2012-02-08 |
BRPI1103174B1 (en) | 2020-01-21 |
CN102345191B (en) | 2016-02-24 |
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