EP0941673A1 - Method and apparatus for the manufacturing of rod filter for rod-shaped article in the tobacco industry - Google Patents

Method and apparatus for the manufacturing of rod filter for rod-shaped article in the tobacco industry Download PDF

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Publication number
EP0941673A1
EP0941673A1 EP99104259A EP99104259A EP0941673A1 EP 0941673 A1 EP0941673 A1 EP 0941673A1 EP 99104259 A EP99104259 A EP 99104259A EP 99104259 A EP99104259 A EP 99104259A EP 0941673 A1 EP0941673 A1 EP 0941673A1
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EP
European Patent Office
Prior art keywords
filter tow
filter
air flow
tow strip
section
Prior art date
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Granted
Application number
EP99104259A
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German (de)
French (fr)
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EP0941673B1 (en
Inventor
Firdausia Dr. Chehab
Stefan Fietkau
Franz-Peter Arnold
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Koerber Technologies GmbH
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Hauni Maschinenbau GmbH
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Publication of EP0941673A1 publication Critical patent/EP0941673A1/en
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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming

Definitions

  • the invention relates to a method for producing filter rods for rod-shaped Article of the tobacco processing industry, in which one withdrawn from a stock and stretched filter tow stripe stretched along a conveyor line, with sprayed the filter material dissolving application liquid and then one the strip width is subjected to gathering.
  • the invention also relates to a device for producing filter rods for rod-shaped articles of the tobacco processing industry, with one on one of a filter towstrip drawn and spread out along a Stretching device, one stretching along the filter tow strip an application line with an application liquid that dissolves the filter material spraying application device as well as the stripe width of the filter tow stripe along a shirring device reducing shirring device.
  • Filters for filter cigarettes and other smokable articles in the tobacco processing industry are usually made from a filter tow material which is made of a loose, crimped fiber fabric.
  • a preferred material for the manufacture of cigarette filters is a filter tow made of cellulose acetate threads.
  • the filter tow material is supplied in bales and must be prepared for the production of a filter strand.
  • the lowest possible filter weight with optimal, ie high, pulling resistance is sought. In order to achieve these optimal properties, it is known, for example, according to US Pat. No.
  • the invention has for its object to ensure homogeneous preparation and distribution of the filter material in the filter strand by process-supporting action on the filter tow strip even at high conveying speeds.
  • the filter tow strip is exposed to an air flow flowing in the conveying direction of the filter tow strip at least on a section of the conveying section.
  • conditions which are optimally adapted to the respective treatment stage can be achieved in that the flow speed of the air flow corresponds at least approximately to the conveying speed of the filter tow strip, the flow speed of the air flow preferably being greater than or equal to the conveying speed of the filter tow strip.
  • the effectiveness of the proposed measures can be further increased by the fact that the filter towstrip is accompanied by the air flow on both broad sides, with the additional advantage that fibers detached from the filter towstrip or fibers adhering loosely to it are completely removed.
  • the filter tow strip be acted upon by the air flow during its stretching and also during its gathering.
  • Their property as accompanying the filter tow strip and loose fibers and dust absorbing and discharging air flow is optimized in particular in the aforementioned treatment zones according to a further proposal in that the air flow is generated by an effective suction at the end of a section of the conveyor line.
  • the filter tow strip be subjected to one side in a relaxation zone extending between stretching and spraying by the air flow generated by compressed air supply and suction.
  • the device for carrying out the method mentioned at the outset consists in that the filter tow strip is guided at least on a section of the conveying section formed by the stretching section, the application section and the gathering section through a wind tunnel charged with an air flow guided in the conveying direction of the filter tow section.
  • the effectiveness of the wind tunnel in the sense of a supporting tow guidance is best when the end of a section of the route impacted by the air flow is connected to the suction side of a fan giving the air flow an approximately equal or greater speed relative to the conveying speed of the filter tow strip.
  • An additional increase in effectiveness for guiding and removing detached or loosely adhering fibers from the filter tow strip is provided by the fact that the end of the route section has a suction air connection on both broad sides of the filter tow strip.
  • a process-supporting effect in particularly sensitive treatment phases of the filter tow strip is possible according to further embodiments in that a suction air connection is provided at the outlet of the stretching device and at the outlet of the gathering device.
  • an additional possibility for adjusting the air flow is given in that the wind tunnel is limited by channel walls that can be adjusted transversely to the filter tow strip.
  • the wind tunnel In order to be able to maintain a laminar air flow in particularly critical zones, provision is also made for the wind tunnel to be limited on the outlet side by a flow profile which essentially deflects the suction air flow by 180 °. According to a further development, a stable straight-line design of the filter tow strip after leaving the stretching zone is ensured in that in a relaxation zone extending between the stretching device and the application device, a blowing air nozzle opening into the wind tunnel and a suction air connection connected to the wind tunnel are provided.
  • the advantage achieved by the invention is that especially at high Conveying speeds are increasingly negatively influencing the preparation process Factors such as dynamic pressure or air friction are rendered ineffective.
  • the laminar air flow accompanying the filter tow strip prevents air eddies, so that a trouble-free or homogeneous specific tow treatment in the stretching zone, the relaxation zone and the gathering zone is guaranteed.
  • FIG. 1 is part of a processing arrangement disclosed, for example, in the aforementioned US Pat. No. 5,590,449 for treating a filter tow strip 1 made of cellulose acetate and drawn from a bale in a manner not shown here.
  • a stretching section 3 an application section 4 with a relaxation zone 6 assigned between the stretching section 3 and the application section 4 and a gathering section 7 are provided in succession with respect to the conveying direction (arrow 2).
  • a stretching device forming the stretching section 3 has an input roller pair 8 with motor-driven rollers 9, 11 and an output roller pair 12 with motor-driven rollers 13, 14, the peripheral speeds of which are somewhat greater than the peripheral speed of the rollers 9, 11, so that the elastic filter tow strip 1 is stretched in a defined manner.
  • the pair of rollers 12 is followed by a further pair of rollers 16 made of motor-driven rollers 17, 18, the peripheral speeds of which are lower than those of the rollers 13, 14, so that the filter tow strip 1 relaxes slightly when it is conveyed in accordance with arrow 2.
  • the roller pairs 12 and 16 thus delimit the application section 4, in which an application device 19 in the form of a spraying device 21 is arranged, which from both sides carries the filter tow strip 1 transported in the direction of the arrow 2 with fine droplets of a solvent for the filter tow material, for example triazetin, sprayed.
  • the gathering section 7 is sequential to the application section 4 in which the filter tow strip 1 is conveyed by a motor-driven deflection roller 22 in the direction of arrow 2 and the width of which is constantly reduced by gathering devices, also not shown, which are also disclosed in US Pat. No. 5,590,449.
  • US Pat. No. 5,590,449. In a manner also not shown and disclosed in US Pat. No.
  • the filter tow strip 1 is then introduced into the actual filter rod machine via a stuffing nozzle and an inlet funnel.
  • the filter tow strip 1 is passed through a wind tunnel 23, which extends between the roller pairs 8 and 12 on both sides of the filter tow strip, in which an air flow 24, which runs parallel to the filter tow strip and in its conveying direction (arrow 2), is generated, which approximately has the same or greater speed (for example in the order of 10 m / sec) relative to the conveying speed of the filter tow strip 1 (for example in the order of 600 m / min).
  • the wind tunnel 23 is provided at the end of the stretching section 3 with a suction air connection 26 connected to the suction side of a blower and at the entrance of the stretching section 3 with an air inlet 27.
  • the wind tunnel 23 is delimited by channel walls 28 which can be adjusted transversely to the broad side of the filter tow strip 1.
  • the wind tunnel 23 is provided at the outlet end with a flow profile 29 which deflects the air flow 24 by 180 °. According to FIGS.
  • the filter tow strip 1 is passed in the region of the relaxation zone 6 through a wind tunnel 31, in which it is acted upon on one side by a parallel air flow 32 which flows through a blowing air nozzle 33 opening into the wind tunnel 31 and one with the wind tunnel 31 connected suction air connection 34 is generated.
  • an angled deflector plate 36 and a guide plate 37 are provided on the upper side at the inlet of the wind tunnel 31.
  • the filter tow strip 1 is likewise passed through a wind tunnel 38, in which it is acted upon on both sides by a parallel air flow 39 which is generated by a suction air connection 41 and air inlet 40 connected to the suction side of a blower.
  • ionizing rods 42 are installed, such as those sold by the HAUG company under the type designation EI-RD Tandem with the power supply unit under the type designation EN-70, and with which the filter tow strip 1 from adhering for which further processing is freed of disadvantageous electrostatic charges.
  • the mode of action of the laminar air flows 24, 32, 39 in the region of the Stretching section 3 or relaxation zone 6 or gathering section 7 is such that the respective preparation process by preventing air friction or air whirling, d. H. Stretching, relaxation and gathering defined and without interference can take place, these supporting the process air flows at the same time as a transport medium for the removal of dust and loosely adhering or detached fibers. There is also a safe tow guide in the relaxation zone 6 in the area of the transition from the stretching section 3 to the application section 4 guaranteed.

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  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • X-Ray Techniques (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)

Abstract

A filter tow strip is extracted from a store and spread out along a conveyor section where the filter material is sprayed with fluid and finally gathered up to reduce the strip width. On at least one stretch (3,6,7) of the conveyor section the filter tow strip (1) is exposed to an air current (24,32,39) flowing in the filter tow strip's direction of travel and situated in a wind-tunnel (23,31,38). The air current flow speed at least approximately matches that of the filter tow strip

Description

Die Erfindung betrifft ein Verfahren zum Herstellen Von Filterstäben für stabförmige Artikel der tabakverarbeitenden Industrie, bei dem ein von einem Vorrat abgezogener und ausgebreiteter Filtertowstreifen entlang einer Förderstrecke gereckt, mit das Filtermaterial anlösender Auftragflüssigkeit besprüht und anschließend einer die Streifenbreite vermindernden Raffung unterzogen wird.The invention relates to a method for producing filter rods for rod-shaped Article of the tobacco processing industry, in which one withdrawn from a stock and stretched filter tow stripe stretched along a conveyor line, with sprayed the filter material dissolving application liquid and then one the strip width is subjected to gathering.

Die Erfindung betrifft außerdem eine Vorrichtung zum Herstellen von Filterstäben für stabförmige Artikel der tabakverarbeitenden Industrie, mit einer auf einen von einem Vorrat abgezogenen und ausgebreiteten Filtertowstreifen entlang einer Reckstrecke einwirkenden Reckeinrichtung, einer den Filtertowstreifen entlang einer Auftragstrecke mit einer das Filtermaterial anlösenden Auftragflüssigkeit besprühenden Auftrageinrichtung sowie einer die Streifenbreite des Filtertowstreifens entlang einer Raffstrecke vermindernden Raffeinrichtung.The invention also relates to a device for producing filter rods for rod-shaped articles of the tobacco processing industry, with one on one of a filter towstrip drawn and spread out along a Stretching device, one stretching along the filter tow strip an application line with an application liquid that dissolves the filter material spraying application device as well as the stripe width of the filter tow stripe along a shirring device reducing shirring device.

Filter für Filterzigaretten und andere rauchbare Artikel der tabakverarbeitenden Industrie werden gewöhnlich aus einem Filtertowmaterial hergestellt, welches aus einem lockeren, gekräuselten Fasergewebe besteht. Ein bevorzugtes Material für die Herstellung von Zigarettenfiltern ist ein Filtertow aus Celluloseacetatfäden. Das Filtertowmaterial wird in Ballen geliefert und muß für die Herstellung eines Filterstrangs aufbereitet werden. Um Filter mit optimalen Eigenschaften in engen Toleranzgrenzen bei optimaler Towausbeute zu erzielen, ist es erforderlich, das Filtertowmaterial möglichst homogen aufzubereiten und im Filterstrang zu verteilen. Insbesondere wird ein möglichst geringes Filtergewicht bei optimalem, d. h. hohem Zugwiderstand angestrebt. Um diese optimalen Eigenschaften zu erreichen, ist es beispielsweise nach der US-PS 5 590 449 bekannt, das von einem Ballen abgezogene Filtertowmaterial mittels von Ausbreiterdüsen abgegebenen Luftströmen auszubreiten und dann zu recken, ehe es als flacher Filtertowstreifen den anschließend vorgesehenen Behandlungs- und Bearbeitungsschritten unterzogen, d. h. mit einem Lösungsmittel, zum Beispiel Triazetin, besprüht, seitlich gerafft, einer mit Blasluft beaufschlagten Düse und anschließend einem Trichter zugeführt wird, von dem aus der aufbereitete und verdichtete Filtertowstreifen einer Filterstrangmaschine zugeführt wird, wo er zu einem Filterstrang geformt und unter weiterer Verdichtung fortlaufend mit einem Hüllmaterialstreifen umhüllt wird, von dem anschließend Filterstäbe abgeschnitten werden.
Es hat sich nun gezeigt, daß trotz Ausbreitung und Streckung des Filtertowstreifens Faserverdichtungen im Filtertowstreifen erhalten bleiben können, die zur Verschlechterung der Filtereigenschaften führen können.
Der Erfindung liegt die Aufgabe zugrunde, durch prozeßunterstützende Einwirkung auf den Filtertowstreifen auch bei hohen Fördergeschwindigkeiten eine homogene Aufbereitung und Verteilung des Filtermaterials im Filterstrang zu gewährleisten.Filters for filter cigarettes and other smokable articles in the tobacco processing industry are usually made from a filter tow material which is made of a loose, crimped fiber fabric. A preferred material for the manufacture of cigarette filters is a filter tow made of cellulose acetate threads. The filter tow material is supplied in bales and must be prepared for the production of a filter strand. In order to achieve filters with optimal properties within narrow tolerance limits with optimum tow yield, it is necessary to prepare the filter tow material as homogeneously as possible and to distribute it in the filter strand. In particular, the lowest possible filter weight with optimal, ie high, pulling resistance is sought. In order to achieve these optimal properties, it is known, for example, according to US Pat. No. 5,590,449, to spread and then stretch the filter tow material drawn off from a bale by means of air streams emitted by spreading nozzles, before it is subjected to the subsequently provided treatment and processing steps as a flat filter tow strip , ie sprayed with a solvent, for example triazetin, gathered laterally, fed to a nozzle charged with blown air and then fed to a funnel, from which the processed and compressed filter tow strip is fed to a filter rod machine, where it is formed into a filter rod and with further compression is continuously wrapped with a strip of wrapping material, from which filter rods are then cut off.
It has now been shown that, despite the spreading and stretching of the filter tow strip, fiber densifications can be retained in the filter tow strip, which can lead to a deterioration in the filter properties.
The invention has for its object to ensure homogeneous preparation and distribution of the filter material in the filter strand by process-supporting action on the filter tow strip even at high conveying speeds.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Filtertowstreifen zumindest auf einem Streckenabschnitt der Förderstrecke einer in Förderrichtung des Filtertowstreifens fließenden Luftströmung ausgesetzt ist.
Dem jeweiligen Behandlungsstadium optimal angepaßte Verhältnisse lassen sich gemäß vorteilhaften Weiterbildungen dadurch erzielen, daß die Strömungsgeschwindigkeit der Luftströmung zumindest annähernd der Fördergeschwindigkeit des Filtertowstreifens entspricht, wobei die Strömungsgeschwindigkeit der Luftströmung vorzugsweise größer oder gleich der Fördergeschwindigkeit des Filtertowstreifens ist.
Die Effektivität der vorgeschlagenen Maßnahmen läßt sich noch dadurch steigern, daß der Filtertowstreifen an seinen beiden Breitseiten von der Luftströmung begleitet wird, wobei sich zusätzlich der Vorteil ergibt, daß vom Filtertowstreifen abgelöste bzw. lose an ihm haftende Fasern restlos abgeführt werden.
Um in besonders kritischen Behandlungszonen Störeinflüsse zu minimieren bzw. zu eliminieren, wird insbesondere vorgeschlagen, daß der Filtertowstreifen während seiner Reckung und des weiteren während seiner Raffung durch die Luftströmung beaufschlagt wird.
Ihre Eigenschaft als den Filtertowstreifen begleitende sowie lose Fasern und Staub aufnehmende und abführende Luftströmung wird insbesondere in den vorgenannten Behandlungszonen nach einem weiteren Vorschlag dadurch optimiert, daß die Luftströmung jeweils durch eine am Ende eines Streckenabschnitts der Förderstrecke wirksame Absaugung erzeugt wird.
Um insbesondere nach dem Austritt aus der Reckzone eine optimale Führung des Filtertowstreifens sicherzustellen, wird vorgeschlagen, daß der Filtertowstreifen in einer sich zwischen der Reckung und Besprühung erstreckenden Entspannungszone einseitig durch die durch Druckluftzufuhr und Absaugung erzeugte Luftströmung beaufschlagt wird.This object is achieved according to the invention in that the filter tow strip is exposed to an air flow flowing in the conveying direction of the filter tow strip at least on a section of the conveying section.
According to advantageous developments, conditions which are optimally adapted to the respective treatment stage can be achieved in that the flow speed of the air flow corresponds at least approximately to the conveying speed of the filter tow strip, the flow speed of the air flow preferably being greater than or equal to the conveying speed of the filter tow strip.
The effectiveness of the proposed measures can be further increased by the fact that the filter towstrip is accompanied by the air flow on both broad sides, with the additional advantage that fibers detached from the filter towstrip or fibers adhering loosely to it are completely removed.
In order to minimize or eliminate interference in particularly critical treatment zones, it is proposed in particular that the filter tow strip be acted upon by the air flow during its stretching and also during its gathering.
Their property as accompanying the filter tow strip and loose fibers and dust absorbing and discharging air flow is optimized in particular in the aforementioned treatment zones according to a further proposal in that the air flow is generated by an effective suction at the end of a section of the conveyor line.
In order to ensure optimal guidance of the filter tow strip, particularly after exiting the stretching zone, it is proposed that the filter tow strip be subjected to one side in a relaxation zone extending between stretching and spraying by the air flow generated by compressed air supply and suction.

Die Vorrichtung zur Durchführung des eingangs genannten Verfahrens besteht darin, daß der Filtertowstreifen zumindest auf einem Streckenabschnitt der durch die Reckstrecke, die Auftragsstrecke und die Raffstrecke gebildeten Förderstrecke durch einen mit einer in Förderrichtung des Filtertowstreifens geführten Luftströmung beaufschlagten Windkanal hindurchgeführt ist.
Die Wirksamkeit des Windkanals im Sinne einer unterstützenden Towführung ist gemäß einer Ausgestaltung dann am besten, wenn jeweils das Ende eines durch die Luftströmung beaufschlagten Streckenabschnitts mit der Saugseite eines der Luftströmung eine annähernd gleiche oder größere Geschwindigkeit relativ zur Fördergeschwindigkeit des Filtertowstreifens erteilenden Gebläses verbunden ist.The device for carrying out the method mentioned at the outset consists in that the filter tow strip is guided at least on a section of the conveying section formed by the stretching section, the application section and the gathering section through a wind tunnel charged with an air flow guided in the conveying direction of the filter tow section.
According to one embodiment, the effectiveness of the wind tunnel in the sense of a supporting tow guidance is best when the end of a section of the route impacted by the air flow is connected to the suction side of a fan giving the air flow an approximately equal or greater speed relative to the conveying speed of the filter tow strip.

Eine zusätzliche Effektivitätssteigerung zur Towführung und Entfernung abgelöster bzw. lose haftender Fasern vom Filtertowstreifen ist dadurch gegeben, daß das Ende des Streckenabschnitts zu beiden Breitseiten des Filtertowstreifens einen Saugluftanschluß aufweist.
Eine prozeßunterstützende Wirkung in besonders sensiblen Behandlungsphasen des Filtertowstreifens ist gemäß weiteren Ausgestaltungen dadurch möglich, daß am Ausgang der Reckeinrichtung sowie am Ausgang der Raffeinrichtung jeweils ein Saugluftanschluß vorgesehen ist.
Eine zusätzliche Möglichkeit zum Einstellen der Luftströmung ist nach einem weiteren Vorschlag dadurch gegeben, daß der Windkanal durch quer zum Filtertowstreifen einstellbare Kanalwandungen begrenzt ist.
Um in besonders kritischen Zonen eine laminare Luftströmung aufrechterhalten zu können, ist außerdem vorgesehen, daß der Windkanal ausgangsseitig durch ein die Saugluftströmung im wesentlichen um 180° umlenkendes Strömungsprofil begrenzt ist.
Eine stabile Geradeausführung des Filtertowstreifens nach Verlassen der Reckzone ist gemäß einer Weiterbildung dadurch gewährleistet, daß in einer sich zwischen der Reckeinrichtung und der Auftrageinrichtung erstreckenden Entspannungszone eine in den Windkanal einmündende Blasluftdüse und ein mit dem Windkanal verbundener Saugluftanschluß vorgesehen sind.An additional increase in effectiveness for guiding and removing detached or loosely adhering fibers from the filter tow strip is provided by the fact that the end of the route section has a suction air connection on both broad sides of the filter tow strip.
A process-supporting effect in particularly sensitive treatment phases of the filter tow strip is possible according to further embodiments in that a suction air connection is provided at the outlet of the stretching device and at the outlet of the gathering device.
According to a further proposal, an additional possibility for adjusting the air flow is given in that the wind tunnel is limited by channel walls that can be adjusted transversely to the filter tow strip.
In order to be able to maintain a laminar air flow in particularly critical zones, provision is also made for the wind tunnel to be limited on the outlet side by a flow profile which essentially deflects the suction air flow by 180 °.
According to a further development, a stable straight-line design of the filter tow strip after leaving the stretching zone is ensured in that in a relaxation zone extending between the stretching device and the application device, a blowing air nozzle opening into the wind tunnel and a suction air connection connected to the wind tunnel are provided.

Der mit der Erfindung erzielte Vorteil besteht darin, daß die insbesondere bei hohen Fördergeschwindigkeiten den Aufbereitungsprozeß zunehmend negativ beeinflussenden Faktoren, wie Staudruck oder Luftreibung, unwirksam gemacht werden. Die den Filtertowstreifen begleitende laminare Luftströmung verhindert Luftwirbel, so daß eine störungsfreie bzw. homogene spezifische Towbehandlung in der Reckzone, der Entspannungszone und der Raffzone gewährleistet ist. Gleichzeitig dient die Luftströmung als Transportmedium zum Entfernen von abgelösten bzw. lose haftenden Towfasern. Daraus resultiert insgesamt eine deutliche, stabile Qualitätsverbesserung des Endproduktes. The advantage achieved by the invention is that especially at high Conveying speeds are increasingly negatively influencing the preparation process Factors such as dynamic pressure or air friction are rendered ineffective. The laminar air flow accompanying the filter tow strip prevents air eddies, so that a trouble-free or homogeneous specific tow treatment in the stretching zone, the relaxation zone and the gathering zone is guaranteed. Serves at the same time the air flow as a transport medium for removing detached or loose clinging tow fibers. Overall, this results in a clear, stable Quality improvement of the end product.

Die Erfindung wird nachfolgend anhand eines in der Zeichnung dargestellen Ausführungsbeispiels näher erläutert.The invention is illustrated below using one in the drawing Embodiment explained in more detail.

Hierbei zeigen:

Figur 1
einen die Erfindung betreffenden, im wesentlichen U-förmig gestalteten Förder- und Behandlungsabschnitt einer Aufbereitungsstrecke für einen Filtertowstreifen,
Figur 2
einen vergrößerten Teilausschnitt X gemäß Figur 1 aus der Aufbereitungsstrecke und
Figur 3
eine Draufsicht auf eine unterseitige Düsenanordnung in Richtung des Pfeils Y gemäß Figur 2.
Here show:
Figure 1
an essentially U-shaped conveying and treatment section of a processing section for a filter tow strip which relates to the invention,
Figure 2
an enlarged partial section X according to Figure 1 from the processing section and
Figure 3
3 shows a plan view of a nozzle arrangement on the underside in the direction of arrow Y according to FIG. 2.

Die in Figur 1 dargestellte Anordnung ist Teil einer beispielsweise in der genannten US-PS 5 590 449 offenbarten Aufbereitungsanordnung zur Behandlung eines auf hier nicht gezeigte Weise von einem Ballen abgezogenen und vorgereckten Filtertowstreifens 1 aus Celluloseacetat.
Für die im erfindungsgemäßen Zusammenhang relevante Weiterbehandlung des Filtertowstreifens 1 sind - bezogen auf die Förderrichtung (Pfeil 2) - aufeinanderfolgend eine Reckstrecke 3, eine Auftragstrecke 4 mit zwischen der Reckstrecke 3 und der Auftragstrecke 4 zugeordneter Entspannungszone 6 sowie eine Raffstrecke 7 vorgesehen.
Eine die Reckstrecke 3 bildende Reckeinrichtung weist ein Eingangs-Walzenpaar 8 mit motorisch angetriebenen Walzen 9, 11 sowie ein Ausgangs-Walzenpaar 12 mit motorisch angetriebenen Walzen 13, 14 auf, deren Umfangsgeschwindigkeiten etwas größer sind als die Umfangsgeschwindigkeit der Walzen 9, 11, so daß der elastische Filtertowstreifen 1 definiert gereckt wird.
Dem Walzenpaar 12 ist ein weiteres Walzenpaar 16 aus motorisch angetriebenen Walzen 17, 18 nachgeordnet, deren Umfangsgeschwindigkeiten geringer sind als diejenigen der Walzen 13, 14, so daß der Filtertowstreifen 1 sich bei seiner Förderung entsprechend Pfeil 2 leicht entspannt.
Die Walzenpaare 12 und 16 begrenzen somit die Auftragstrecke 4, in der eine Auftrageinrichtung 19 in Form einer Besprüheinrichtung 21 angeordnet ist, welche den in Richtung des Pfeils 2 transportierten Filtertowstreifen 1 von beiden Seiten mit feinen Tröpfchen eines Lösungsmittels für das Filtertowmaterial, zum Beispiel Triazetin, besprüht.
Der Auftragstrecke 4 nachgeordnet ist die Raffstrecke 7, in der der Filtertowstreifen 1 von einer motorisch angetriebenen Umlenkwalze 22 in Richtung des Pfeils 2 gefördert wird und dessen Breite durch nicht dargestellte, ebenfalls in der US-PS 5 590 449 offenbarte Raffeinrichtungen konstant verringert wird.
Auf ebenfalls nicht dargestellte, in der US-PS 5 590 449 offenbarte Weise wird der Filtertowstreifen 1 anschließend über eine Stopfdüse und einen Einlauftrichter in die eigentliche Filterstrangmaschine eingeführt.
Innerhalb der Reckstrecke 3 ist der Filtertowstreifen 1 durch einen sich zwischen den Walzenpaaren 8 und 12 zu beiden Seiten des Filtertowstreifens erstreckenden Windkanal 23 hindurchgeführt, in welchem eine parallel zum Filtertowstreifen und in dessen Förderrichtung (Pfeil 2) verlaufende Luftströmung 24 erzeugt wird, die eine annähernd gleiche oder größere Geschwindigkeit (beispielsweise in einer Größenordnung von 10 m/sek) relativ zur Fördergeschwindigkeit des Filtertowstreifens 1 (beispielsweise in einer Größenordnung von 600 m/min) aufweist. Zum Erzeugen der Luftströmung 24 ist der Windkanal 23 am Ende der Reckstrecke 3 mit einem mit der Saugseite eines Gebläses verbunden Saugluftanschluß 26 und am Eingang der Reckstrecke 3 mit einem Lufteinlaß 27 versehen. Der Windkanal 23 ist durch Kanalwandungen 28 begrenzt, die quer zur Breitseite des Filtertowstreifens 1 einstellbar sind. Außerdem ist der Windkanal 23 am auslaßseitigen Ende mit einem die Luftströmung 24 um 180° umlenkenden Strömungsprofil 29 versehen.
Gemäß den Figuren 2 und 3 ist der Filtertowstreifen 1 im Bereich der Entspannungszone 6 durch einen Windkanal 31 hindurchgeführt, in welchem er einseitig durch eine parallel geführte Luftströmung 32 beaufschlagt wird, die durch eine in den Windkanal 31 einmündende Blasluftdüse 33 und einen mit dem Windkanal 31 verbundenen Saugluftanschluß 34 erzeugt wird.
Darüber hinaus sind am Einlaß des Windkanals 31 oberseitig ein abgewinkeltes Abweiserblech 36 und unterseitig ein Leitblech 37 vorgesehen.
In der Raffstrecke 7 ist der Filtertowstreifen 1 ebenfalls durch einen Windkanal 38 hindurchgeführt, in welchem er beidseitig durch eine parallel gerichtete Luftströmung 39 beaufschlagt wird, die durch einen an die Saugseite eines Gebläses angeschlossenen Saugluftanschluß 41 und Lufteinlaß 40 erzeugt wird.
Darüber hinaus sind entlang der Raffstrecke 7 im Windkanal 38 Ionisierungsstäbe 42 installiert, wie sie beispielsweise von der Firma HAUG unter der Typenbezeichnung EI-RD Tandem mit dem Netzteil unter der Typenbezeichnung EN-70 vertrieben werden, und womit der Filtertowstreifen 1 von anhaftenden, für die weitere Bearbeitung nachteiligen elektrostatischen Ladungen befreit wird.The arrangement shown in FIG. 1 is part of a processing arrangement disclosed, for example, in the aforementioned US Pat. No. 5,590,449 for treating a filter tow strip 1 made of cellulose acetate and drawn from a bale in a manner not shown here.
For the further treatment of the filter tow strip 1 which is relevant in the context of the invention, a stretching section 3, an application section 4 with a relaxation zone 6 assigned between the stretching section 3 and the application section 4 and a gathering section 7 are provided in succession with respect to the conveying direction (arrow 2).
A stretching device forming the stretching section 3 has an input roller pair 8 with motor-driven rollers 9, 11 and an output roller pair 12 with motor-driven rollers 13, 14, the peripheral speeds of which are somewhat greater than the peripheral speed of the rollers 9, 11, so that the elastic filter tow strip 1 is stretched in a defined manner.
The pair of rollers 12 is followed by a further pair of rollers 16 made of motor-driven rollers 17, 18, the peripheral speeds of which are lower than those of the rollers 13, 14, so that the filter tow strip 1 relaxes slightly when it is conveyed in accordance with arrow 2.
The roller pairs 12 and 16 thus delimit the application section 4, in which an application device 19 in the form of a spraying device 21 is arranged, which from both sides carries the filter tow strip 1 transported in the direction of the arrow 2 with fine droplets of a solvent for the filter tow material, for example triazetin, sprayed.
Subsequent to the application section 4 is the gathering section 7, in which the filter tow strip 1 is conveyed by a motor-driven deflection roller 22 in the direction of arrow 2 and the width of which is constantly reduced by gathering devices, also not shown, which are also disclosed in US Pat. No. 5,590,449.
In a manner also not shown and disclosed in US Pat. No. 5,590,449, the filter tow strip 1 is then introduced into the actual filter rod machine via a stuffing nozzle and an inlet funnel.
Within the stretching section 3, the filter tow strip 1 is passed through a wind tunnel 23, which extends between the roller pairs 8 and 12 on both sides of the filter tow strip, in which an air flow 24, which runs parallel to the filter tow strip and in its conveying direction (arrow 2), is generated, which approximately has the same or greater speed (for example in the order of 10 m / sec) relative to the conveying speed of the filter tow strip 1 (for example in the order of 600 m / min). To generate the air flow 24, the wind tunnel 23 is provided at the end of the stretching section 3 with a suction air connection 26 connected to the suction side of a blower and at the entrance of the stretching section 3 with an air inlet 27. The wind tunnel 23 is delimited by channel walls 28 which can be adjusted transversely to the broad side of the filter tow strip 1. In addition, the wind tunnel 23 is provided at the outlet end with a flow profile 29 which deflects the air flow 24 by 180 °.
According to FIGS. 2 and 3, the filter tow strip 1 is passed in the region of the relaxation zone 6 through a wind tunnel 31, in which it is acted upon on one side by a parallel air flow 32 which flows through a blowing air nozzle 33 opening into the wind tunnel 31 and one with the wind tunnel 31 connected suction air connection 34 is generated.
In addition, an angled deflector plate 36 and a guide plate 37 are provided on the upper side at the inlet of the wind tunnel 31.
In the gathering section 7, the filter tow strip 1 is likewise passed through a wind tunnel 38, in which it is acted upon on both sides by a parallel air flow 39 which is generated by a suction air connection 41 and air inlet 40 connected to the suction side of a blower.
In addition, along the shirring section 7 in the wind tunnel 38 ionizing rods 42 are installed, such as those sold by the HAUG company under the type designation EI-RD Tandem with the power supply unit under the type designation EN-70, and with which the filter tow strip 1 from adhering for which further processing is freed of disadvantageous electrostatic charges.

Die Wirkungsweise der laminaren Luftströmungen 24, 32, 39 im Bereich der Reckstrecke 3 bzw. der Entspannungszone 6 bzw. der Raffstrecke 7 ist derart, daß durch Verhinderung von Luftreibung bzw. Luftwirbeln der jeweilige Aufbereitungsprozeß, d. h. Reckung, Entspannung und Raffung definiert und ohne Störgrößeneinwirkung erfolgen kann, wobei diese den Prozeß unterstützenden Luftströmungen gleichzeitig als Transportmedium zur Abführung von Staub und lose haftenden bzw. abgelösten Fasern dienen. Außerdem ist eine sichere Towführung in der Entspannungszone 6 im Bereich des Übergangs von der Reckstrecke 3 zur Auftragstrecke 4 gewährleistet.The mode of action of the laminar air flows 24, 32, 39 in the region of the Stretching section 3 or relaxation zone 6 or gathering section 7 is such that the respective preparation process by preventing air friction or air whirling, d. H. Stretching, relaxation and gathering defined and without interference can take place, these supporting the process air flows at the same time as a transport medium for the removal of dust and loosely adhering or detached fibers. There is also a safe tow guide in the relaxation zone 6 in the area of the transition from the stretching section 3 to the application section 4 guaranteed.

Claims (16)

Verfahren zum Herstellen von Filterstäben für stabförmige Artikel der tabakverarbeitenden Industrie, bei dem ein von einem Vorrat abgezogener und ausgebreiteter Filtertowstreifen entlang einer Förderstrecke gereckt, mit das Filtermaterial anlösender Auftragflüssigkeit besprüht und anschließend einer die Streifenbreite vermindernden Raffung unterzogen wird, dadurch gekennzeichnet, daß der Filtertowstreifen (1) zumindest auf einem Streckenabschnitt (3; 6; 7) der Förderstrecke einer in Förderrichtung (Pfeil 2) des Filtertowstreifens fließenden Luftströmung (24; 32; 39) ausgesetzt ist.Process for producing filter rods for rod-shaped articles of the tobacco processing industry where one is withdrawn and Spread filter tow streak stretched along a conveyor line, with that Sprayed application liquid filter material and then sprayed one Strip width reducing gathering, characterized, that the filter tow strip (1) at least on one section (3; 6; 7) of the Conveying path of a flowing in the conveying direction (arrow 2) of the filter tow strip Air flow (24; 32; 39) is exposed. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Strömungsgeschwindigkeit der Luftströmung (24; 32; 39) zumindest annähernd der Fördergeschwindigkeit des Filtertowstreifens (1) entspricht.A method according to claim 1, characterized in that the flow rate the air flow (24; 32; 39) at least approximately the conveying speed of the filter tow strip (1). Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Strömungsgeschwindigkeit der Luftströmung (24; 32; 39) vorzugsweise größer oder gleich der Fördergeschwindigkeit des Filtertowstreifens (1) ist.A method according to claim 2, characterized in that the flow rate the air flow (24; 32; 39) is preferably greater than or equal to that Conveying speed of the filter tow strip (1) is. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Filtertowstreifen (1) an seinen beiden Breitseiten von der Luftströmung (24; 39) begleitet wird.Method according to one of claims 1 to 3, characterized in that the filter tow strip (1) on its two broad sides from the air flow (24; 39) is accompanied. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Filtertowstreifen (1) während seiner Reckung durch die Luftströmung (24) beaufschlagt wird.Method according to one of claims 1 to 4, characterized in that the filter tow strip (1) during its stretching by the air flow (24) is applied. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Filtertowstreifen (1) während seiner Raffung durch die Luftströmung (39) beaufschlagt wird.Method according to one of claims 1 to 4, characterized in that the filter tow strip (1) during its gathering by the air flow (39) is applied. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Luftströmung (24; 39) jeweils durch eine am Ende eines Streckenabschnitts (3; 7) der Förderstrecke wirksame Absaugung (26; 41) erzeugt wird.Method according to one of claims 1 to 6, characterized in that the air flow (24; 39) in each case through a at the end of a route section (3; 7) the conveyor section effective suction (26; 41) is generated. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Filtertowstreifen (1) in einer sich zwischen der Reckung und Besprühung erstreckenden Entspannungszone (6) einseitig durch die durch Druckluftzufuhr und Absaugung erzeugte Luftströmung (32) beaufschlagt wird.Method according to one of claims 1 to 7, characterized in that the filter tow strip (1) in one between stretching and spraying extending relaxation zone (6) on one side by the compressed air supply and Extraction generated air flow (32) is applied. Vorrichtung zum Herstellen von Filterstäben für stabförmige Artikel der tabakverarbeitenden Industrie, mit einer auf einen von einem Vorrat abgezogenen und ausgebreiteten Filtertowstreifen entlang einer Reckstrecke einwirkenden Reckeinrichtung, einer den Filtertowstreifen entlang einer Auftragstrecke mit einer das Filtermaterial anlösenden Auftragflüssigkeit besprühenden Auftrageinrichtung sowie einer die Streifenbreite des Filtertowstreifens entlang einer Raffstrecke vermindernden Raffeinrichtung, dadurch gekennzeichnet, daß der Filtertowstreifen (1) zumindest auf einem Streckenabschnitt der durch die Reckstrecke (3), die Auftragstrecke (4) und die Raffstrecke (7) gebildeten Förderstrecke durch einen mit einer in Förderrichtung (Pfeil 2) des Filtertowstreifens geführten Luftströmung (24; 32; 39) beaufschlagten Windkanal (23; 31; 38) hindurchgeführt ist.Device for producing filter rods for rod-shaped articles of the tobacco processing industry Industry, with one deducted from a stock and one filter tow stripes spread out along a stretching device, one the filter towstrip along an order line with one that Application device spraying filter material dissolving application device as well one reducing the strip width of the filter tow strip along a gathering section Gathering device, characterized in that the filter tow strip (1) at least on a section of the stretch through the stretching section (3), the application section (4) and the shirring section (7) formed by a conveyor with a Direction of delivery (arrow 2) of the filter tow strip guided air flow (24; 32; 39) acted upon wind tunnel (23; 31; 38) is passed. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß jeweils das Ende eines durch die Luftströmung (24; 39) beaufschlagten Streckenabschnitts mit der Saugseite eines der Luftströmung eine annähernd gleiche oder größere Geschwindigkeit relativ zur Fördergeschwindigkeit des Filtertowstreifens (1) erteilenden Gebläses verbunden ist. Apparatus according to claim 9, characterized in that in each case End of a section of the route acted upon by the air flow (24; 39) the suction side of the air flow is approximately the same or larger Speed relative to the conveying speed of the filter tow strip (1) issuing fan is connected. Vorrichtung nach Anspruch 9 oder 10, dadurch gekennzeichnet, daß das Ende des Streckenabschnitts zu beiden Breitseiten des Filtertowstreifens (1) einen Saugluftanschluß (26; 41) aufweist.Apparatus according to claim 9 or 10, characterized in that the At the end of the section on both broad sides of the filter tow strip (1) Has suction air connection (26; 41). Vorrichtung nach einem der Ansprüche 9 bis 11, dadurch gekennzeichnet, daß am Ausgang der Reckeinrichtung (8, 12) ein Saugluftanschluß (26) vorgesehen ist.Device according to one of claims 9 to 11, characterized in that that a suction air connection (26) is provided at the output of the stretching device (8, 12) is. Vorrichtung nach einem der Ansprüche 9 bis 12, dadurch gekennzeichnet, daß am Ausgang der Raffeinrichtung (16, 22) ein Saugluftanschluß (41) vorgesehen ist.Device according to one of claims 9 to 12, characterized in that that a suction air connection (41) is provided at the outlet of the gathering device (16, 22) is. Vorrichtung nach einem der Ansprüche 9 bis 13, dadurch gekennzeichnet, daß der Windkanal (23) durch quer zum Filtertowstreifen (1) einstellbare Kanalwandungen (28) begrenzt ist.Device according to one of claims 9 to 13, characterized in that that the wind tunnel (23) through channel walls adjustable transversely to the filter tow strip (1) (28) is limited. Vorrichtung nach einem der Ansprüche 9 bis 14, dadurch gekennzeichnet, daß der Windkanal (23) ausgangsseitig durch ein die Saugluftströmung (24) im wesentlichen um 180° umlenkendes Strömungsprofil (29) begrenzt ist.Device according to one of claims 9 to 14, characterized in that that the wind tunnel (23) on the output side through a suction air flow (24) in is substantially limited by 180 ° deflecting flow profile (29). Vorrichtung nach einem der Ansprüche 9 bis 15, dadurch gekennzeichnet, daß in einer sich zwischen der Reckeinrichtung (8, 12) und der Auftrageinrichtung (21) erstreckenden Entspannungszone (6) eine in den Windkanal (31) einmündende Blasluftdüse (33) und ein mit dem Windkanal verbundener Saugluftanschluß (34) vorgesehen sind.Device according to one of claims 9 to 15, characterized in that that in one between the stretching device (8, 12) and the application device (21) extending relaxation zone (6) opening into the wind tunnel (31) Blowing air nozzle (33) and a suction air connection connected to the wind tunnel (34) are provided.
EP99104259A 1998-03-13 1999-03-03 Method and apparatus for the manufacturing of rod filter for rod-shaped article in the tobacco industry Expired - Lifetime EP0941673B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19811014 1998-03-13
DE19811014A DE19811014A1 (en) 1998-03-13 1998-03-13 Method and device for producing filter rods for rod-shaped articles in the tobacco processing industry

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EP0941673A1 true EP0941673A1 (en) 1999-09-15
EP0941673B1 EP0941673B1 (en) 2002-08-21

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EP (1) EP0941673B1 (en)
JP (2) JP4319281B2 (en)
CN (1) CN1106808C (en)
DE (2) DE19811014A1 (en)
ES (1) ES2179563T3 (en)
PL (1) PL188570B1 (en)
WO (1) WO1999048342A1 (en)

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EP1911362A1 (en) * 2006-09-29 2008-04-16 Philip Morris Products S.A. Appartus for blooming cigarette filter tow band
DE102008003368A1 (en) * 2008-01-08 2009-07-09 Hauni Maschinenbau Aktiengesellschaft Device for transporting a filter tow
EP2106709A1 (en) * 2008-04-01 2009-10-07 Hauni Maschinenbau AG Device for transporting a filter tow
EP2213182A1 (en) * 2003-11-25 2010-08-04 Hauni Maschinenbau AG Device for providing filter tow material and device for producing filters
EP2022351A3 (en) * 2007-08-07 2010-09-01 G.D S.p.A. An apparatus for processing at least one strip of filters material in the tobacco industry
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EP2213182A1 (en) * 2003-11-25 2010-08-04 Hauni Maschinenbau AG Device for providing filter tow material and device for producing filters
EP1902634A2 (en) * 2006-09-20 2008-03-26 G.D.S.p.A. A machine for manufacturing cigarette filters
EP1902634A3 (en) * 2006-09-20 2009-12-23 G.D.S.p.A. A machine for manufacturing cigarette filters
EP1911362A1 (en) * 2006-09-29 2008-04-16 Philip Morris Products S.A. Appartus for blooming cigarette filter tow band
EP2022351A3 (en) * 2007-08-07 2010-09-01 G.D S.p.A. An apparatus for processing at least one strip of filters material in the tobacco industry
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EP2080440A3 (en) * 2008-01-18 2011-03-02 Hauni Maschinenbau Aktiengesellschaft Device for transporting tow
CN101496640B (en) * 2008-01-18 2013-12-11 豪尼机械制造股份公司 Device for transporting tow
EP2106709A1 (en) * 2008-04-01 2009-10-07 Hauni Maschinenbau AG Device for transporting a filter tow

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EP0941673B1 (en) 2002-08-21
CN1106808C (en) 2003-04-30
DE59902389D1 (en) 2002-09-26
JP2002507831A (en) 2002-03-12
US6263882B1 (en) 2001-07-24
DE19811014A1 (en) 1999-09-16
WO1999048342A1 (en) 1999-09-23
JP4319281B2 (en) 2009-08-26
PL331916A1 (en) 1999-09-27
PL188570B1 (en) 2005-02-28
JPH11290055A (en) 1999-10-26
CN1228946A (en) 1999-09-22
ES2179563T3 (en) 2003-01-16

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