EP2522237B1 - Einheit zum Formen eines Streifens aus Tabak in einer Zigarettenherstellungsmaschine - Google Patents

Einheit zum Formen eines Streifens aus Tabak in einer Zigarettenherstellungsmaschine Download PDF

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Publication number
EP2522237B1
EP2522237B1 EP20120166763 EP12166763A EP2522237B1 EP 2522237 B1 EP2522237 B1 EP 2522237B1 EP 20120166763 EP20120166763 EP 20120166763 EP 12166763 A EP12166763 A EP 12166763A EP 2522237 B1 EP2522237 B1 EP 2522237B1
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EP
European Patent Office
Prior art keywords
tobacco
strip
unit
belt
forming
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP20120166763
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English (en)
French (fr)
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EP2522237A1 (de
Inventor
Fausto Mengoli
Massimo Sartoni
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GD SpA
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GD SpA
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Publication of EP2522237A1 publication Critical patent/EP2522237A1/de
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Publication of EP2522237B1 publication Critical patent/EP2522237B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/14—Machines of the continuous-rod type
    • A24C5/18—Forming the rod
    • A24C5/1857—Belt construction or driving means

Definitions

  • This invention relates to a unit for forming a strip of tobacco in a cigarette making machine.
  • a prior art continuous-rod cigarette making machine usually comprises a vertical flue for feeding a continuous flow of tobacco fibres and a suction conveyor belt located at the top end of the flue, in such a way that the tobacco fibres conveyed by the flue are gradually deposited along the lower branch of the suction belt.
  • Said belt is looped around two end rollers, one a driving roller and one a driven roller.
  • a pneumatic cylinder acts on the driven roller according to the desired level of tensioning of the suction belt.
  • the tensioned suction belt transfers the continuous layer of tobacco accumulated along its lower branch from the top end of the flue to a shaving device for forming the strip of tobacco.
  • the shaving device is equipped with two disk-shaped blades rotating in opposite directions which are substantially at a tangent to each other and shaped in such a way as to give the strip of tobacco two different thicknesses, one greater than the other, alternating with a constant step.
  • the suction belt then feeds the strip of tobacco shaped by the shaving device to a release station, where the strip of tobacco is deposited on a continuous paper web.
  • the strip of tobacco and the paper web are then fed through a forming beam along which the paper web is wrapped around the strip to form the continuous cigarette rod.
  • the rod is divided into individual cigarettes by a cutting device with rotary blade which is adjusted to be synchronised, so that it cuts the continuous rod at an intermediate zone of the strip with greater thickness.
  • a cutting device with rotary blade which is adjusted to be synchronised, so that it cuts the continuous rod at an intermediate zone of the strip with greater thickness.
  • the pneumatic cylinder cannot keep the level of suction belt tensioning constant.
  • the suction belt becomes worn, its thickness being reduced and with it the level of tensioning around the rollers.
  • the pneumatic cylinder intervenes to compensate for the reduction in tensioning which deviates from the level of tensioning set.
  • the strip of tobacco gradually produced along the lower stretch of the suction belt may be shaped in such a way that the thicker zones are no longer separated by a constant step. Consequently, the subsequent steps of cutting the continuous rod may not be synchronised with the position of the thicker zones of the strip, thus compromising the quality and production of the cigarette.
  • the suction belt is subjected to a mechanical stress which shortens its life.
  • the aim of this invention is to provide a unit for forming a strip of tobacco in a cigarette making machine which can overcome the above-mentioned disadvantages.
  • this invention has for an aim to provide a unit for forming a strip of tobacco in a cigarette making machine in which sudden travels by the roller hinged to the tensioning cylinder are limited, during machine operation.
  • the numeral 1 denotes a unit for forming a strip 2 of tobacco, which is part of a cigarette making machine.
  • the forming unit 1 comprises a conveyor 3 with a belt looped on at least two rollers 4 and 5, at least one of which is motor-driven.
  • a belt 6 is looped around a driving roller 4 and a driven roller 5, said rollers respectively rotating about their own axes 4a and 5a.
  • a chamber 7 connected by a duct 8 to a suction source, not illustrated.
  • the bottom of the chamber 7 is delimited by a wall 9 comprising suction holes 10.
  • the belt 6 comprises a lower suction branch 11 for retaining and feeding the strip 2 of tobacco.
  • the lower branch 11 can slide in contact with the wall 9.
  • the lower branch 11 extends from a forming station 12 to an unloading station 13.
  • the forming station 12 comprises a vertical flue 14 located below the lower branch 11. Inside the flue 14 an ascending air current moves the tobacco fibres 15 from the bottom upwards in such a way that they gradually accumulate along the lower branch 11 of the belt 6 forming a continuous layer of tobacco.
  • the forming station 12 also comprises a shaving device 16 located downstream of the flue 14.
  • the shaving device 16 of the known type, comprises two disk-shaped cutters which rotate in opposite directions.
  • Figure 1 only shows one of the two cutters, which are at a tangent to each other.
  • the peripheries of the two cutters are provided with pockets 17 or recesses spaced out at equal angles from each other.
  • the strip of tobacco 2 after the action of the shaving device 16, is shaped with stretches having two different thicknesses which are cyclically alternated.
  • the stretches with greater thickness 18 are the result of the action of the pockets 17.
  • the conveyor 3 feeds the strip 2 of tobacco out of the forming station 12 and towards the unloading station 13.
  • the second conveyor 20 is looped around at least two rollers 21 and 22, and comprises an upper branch 23 able to slide on a shelf 24.
  • the upper branch 23 of the second conveyor 20 supports a paper web 25 for cigarettes which is unwound from a reel 26.
  • the second conveyor 20 feeds the paper web 25 together with the strip of tobacco 2 from the unloading station 13 along a forming beam of the known type and schematically illustrated with the block 27.
  • the forming beam 27 causes gradual transversal folding of the paper web 25 around the strip 2.
  • the opposite longitudinal edges of the paper web 25 are glued together in the known way by a gluing device, not illustrated, located at the infeed of the beam, to form a continuous rod of cigarettes 28 comprising stretches of thicker tobacco at the thicker stretches 18.
  • a control device 39 located downstream of the beam 27, checks if the rod 28 is correctly filled for automatic correction if necessary.
  • a rotary cutting head 29 transversally cuts into pieces the continuous rod 28, forming the individual cigarettes 30.
  • the cutting head 29 is synchronised with the shaving device 16, in such a way as to perform each cutting operation at the centre line of each stretch with thicker tobacco.
  • the unit 1 also comprises tensioning means 31 for the conveyor 3 belt 6.
  • the tensioning means 31 are connected to at least one of the rollers 4 and 5, in particular to the driven roller 5.
  • the tensioning means 31 comprise a fluid-dynamic cylinder 31, preferably pneumatic.
  • the pneumatic cylinder 31 comprises an outer jacket 32 in which a piston 33 can slide, the piston being equipped with a rod 34 extending outside the jacket 32.
  • the piston 33 forms a first and a second chamber 35 and 36.
  • the first chamber 35 comprises a duct 37 in fluid communication with a source schematically illustrated with the block 38.
  • the source 38 is connected in the known way to an adjusting unit, not illustrated, which keeps the pressure of the fluid in the chamber 35 constant.
  • the rod 34 At its free end the rod 34 comprises an eyelet 40 hinged to the shaft of the driven roller 5 and coaxial with it.
  • the pneumatic cylinder 31 is also equipped with a connector 41 fixed to the wall 42 of the chamber 7.
  • the unit 1 comprises at least one damper element 43 operating in conjunction with the tensioning means 31.
  • the damper element is also a fluid-dynamic cylinder 43.
  • the damper element may have different construction solutions depending on the type of damper selected.
  • the fluid-dynamic damper cylinder 43 comprises an outer jacket 44 in which a piston 45 can slide, the piston being equipped with a rod 46 extending outside the jacket 44.
  • Both of the chambers 47 and 48 contain a fluid with predetermined viscosity and are put in communication with each other by a plurality of through holes made in the piston 45.
  • the fluid-dynamic damper cylinder 43 is also equipped with a connector 51 fixed to the wall 42 of the chamber 7.
  • the rods 46 and 34, respectively of the damper element 43 and of the tensioning means 31, are rendered integral with each other by a connecting element 52.
  • the connecting element 52 is fixed, at one of its ends 53a, to the eyelet 50, and, at its opposite end 53b, to an intermediate point of the rod 34, outside the jacket 32.
  • the rod 34 of the tensioning means 31 keeps the driven roller 5 in a position which is gradually set so as to apply a predetermined tensioning force to the belt 6.
  • the source 38 adjusting unit keeps the pressure of the fluid in the chamber 35 constant.
  • the tensioning means 31 are activated along the line D in the direction of arrow F1 for moving the driven roller 5 into the correct operating position for taking up the slack caused by wear on the belt 6 and maintaining suitable belt 6 tension.
  • the damper element 43 significantly attenuates sudden travels of the position of the driven roller 5, in such a way that the adjustment of the belt 6 tensioning force occurs gradually.
  • damper element 43 being indirectly connected to the driven roller 5, further attenuates any vibrations of the driven roller 5 which may occur with greater intensity at high unit 1 operating speeds.
  • the tensioning means 31 act directly along at least one portion of the conveyor 3 belt 6.
  • the damper element 43 limits vibrations and accelerated and uncontrolled travels of the driven roller 5, and consequently of the belt 6 which during unit 1 operation maintains a correct and controlled operating position for obtaining a strip 2 of tobacco with the thicker stretches 18 suitably spaced in steps. Consequently, the subsequent cutting of the continuous rod of cigarettes 28 occurs effectively along the intermediate zone of the stretch with thicker tobacco, thus preventing the individual cigarette from losing tobacco during the subsequent processing steps.

Landscapes

  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)
  • Wrapping Of Specific Fragile Articles (AREA)

Claims (8)

  1. Einheit zum Formen eines Streifens aus Tabak in einer Zigarettenherstellungsmaschine; wobei die Einheit ein Förderband (6) umfasst, das um mindestens zwei Rollen (4, 5) läuft, von denen mindestens eine motorbetrieben ist; wobei das Förderband (6) einen unteren Ansaugschenkel (11) zum Halten und Zuführen eines Streifens (2) aus Tabak umfasst, wobei sich der untere Schenkel (11) von einer Formungsstation (12) zu einer Abführstation (13) erstreckt; wobei die Einheit (1) ein Mittel (31) zum Spannen des Förderbands (6) und mindestens ein Dämpfungselement (43) umfasst, das mit dem Spannungsmittel (31) zusammenarbeitet.
  2. Einheit nach Anspruch 1, dadurch gekennzeichnet, dass das Dämpfungselement (43) mit dem Spannungsmittel (31) verbunden ist.
  3. Einheit nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Dämpfungselement (43) mit mindestens einer der Rollen (4, 5) verbunden ist.
  4. Einheit nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Spannungsmittel (31) mit mindestens einer der Rollen (4, 5) verbunden ist.
  5. Einheit nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Spannungsmittel (31) entlang mindestens eines Abschnitts des Förderbands (6) für den Streifen (2) aus Tabak wirkt.
  6. Einheit nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass sie ein Verbindungselement (52) umfasst, das zwischen dem Spannungsmittel (31) und dem Dämpfungselement (43) liegt.
  7. Einheit nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Spannungsmittel einen fluiddynamischen Zylinder (31) umfasst.
  8. Einheit nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Dämpfungselement einen fluiddynamischen Zylinder (43) umfasst.
EP20120166763 2011-05-09 2012-05-04 Einheit zum Formen eines Streifens aus Tabak in einer Zigarettenherstellungsmaschine Not-in-force EP2522237B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000258A ITBO20110258A1 (it) 2011-05-09 2011-05-09 Unità di formazione di un cordone di tabacco in una macchina confezionatrice di sigarette.

Publications (2)

Publication Number Publication Date
EP2522237A1 EP2522237A1 (de) 2012-11-14
EP2522237B1 true EP2522237B1 (de) 2015-04-29

Family

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Application Number Title Priority Date Filing Date
EP20120166763 Not-in-force EP2522237B1 (de) 2011-05-09 2012-05-04 Einheit zum Formen eines Streifens aus Tabak in einer Zigarettenherstellungsmaschine

Country Status (3)

Country Link
EP (1) EP2522237B1 (de)
CN (1) CN102771890B (de)
IT (1) ITBO20110258A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3501300A1 (de) 2017-12-19 2019-06-26 G.D. S.p.A Fertigungslinie in der tabakindustrie und verfahren zur inspektion davon

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20120679A1 (it) * 2012-12-18 2014-06-19 Gd Spa Unita' di formazione di un cordone di tabacco in una macchina confezionatrice di sigarette.
ITUA20162840A1 (it) 2016-04-22 2017-10-22 Gd Spa Metodo diagnostico per analizzare il funzionamento di almeno una parte di una linea di confezionamento nell’industria del tabacco.
ITUA20162843A1 (it) 2016-04-22 2017-10-22 Gd Spa Metodo di diagnosi del funzionamento di una macchina automatica che processa prodotti nell’industria del tabacco.
IT201700063595A1 (it) * 2017-06-09 2018-12-09 Gd Spa Unità di formazione di un cordone di tabacco per una macchina confezionatrice di sigarette.
CN107235361B (zh) * 2017-07-06 2018-11-23 常德烟草机械有限责任公司 一种吸丝带张紧装置与张紧方法
CN110074453A (zh) * 2019-06-19 2019-08-02 常德烟草机械有限责任公司 一种张紧机构及卷烟机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4215059A1 (de) * 1992-05-07 1993-11-11 Hauni Werke Koerber & Co Kg Vorrichtung zum Fördern eines Tabakstrangs
JP3426691B2 (ja) * 1994-03-28 2003-07-14 日本たばこ産業株式会社 シガレット製造機のたばこバンド装置
TW426506B (en) * 1998-08-06 2001-03-21 Japan Tobacco Inc Belt conveyor type compression forming apparatus for tobacco stream
CN2449505Y (zh) * 2000-10-13 2001-09-26 玉溪红塔烟草(集团)有限责任公司 卷烟机吸丝带传动、张紧装置
DE10119617A1 (de) * 2001-04-21 2002-10-24 Hauni Maschinenbau Ag Verfahren und Vorrichtung zum Beseitigen einer Störung in einem Tabakkanal einer Zigarettenstrangmaschine
EP1424016B1 (de) * 2002-11-29 2006-07-19 Hauni Maschinenbau AG Umlaufendes Förderband zum Fördern eines Strangs der tabakverarbeitenden Industrie

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3501300A1 (de) 2017-12-19 2019-06-26 G.D. S.p.A Fertigungslinie in der tabakindustrie und verfahren zur inspektion davon

Also Published As

Publication number Publication date
CN102771890B (zh) 2015-07-01
CN102771890A (zh) 2012-11-14
ITBO20110258A1 (it) 2012-11-10
EP2522237A1 (de) 2012-11-14

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