EP3405049B1 - Maschine zur herstellung von zigarettenfiltern und verfahren zur herstellung von zigarettenfiltern - Google Patents

Maschine zur herstellung von zigarettenfiltern und verfahren zur herstellung von zigarettenfiltern Download PDF

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Publication number
EP3405049B1
EP3405049B1 EP17704538.2A EP17704538A EP3405049B1 EP 3405049 B1 EP3405049 B1 EP 3405049B1 EP 17704538 A EP17704538 A EP 17704538A EP 3405049 B1 EP3405049 B1 EP 3405049B1
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Prior art keywords
planar
machine according
making machine
internal channel
along
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EP17704538.2A
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English (en)
French (fr)
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EP3405049A1 (de
Inventor
Nicola Baldanza
Ivan Eusepi
Eros Stivani
Massimo Sartoni
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GD SpA
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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
    • A24D3/0229—Filter rod forming processes
    • A24D3/0233—Filter rod forming processes by means of a garniture

Definitions

  • This invention relates to a machine for making cigarette filters and to a method for making cigarette filters.
  • cigarette filters are made from a strip of filter material, usually cellulose acetate, which is drawn out, stretched and treated with additive materials, in particular plasticizing fluids (triacetin, for example) to form a tow of filter material.
  • the tow is processed and subjected to the action of process fluids, such as steam, for example, to obtain a filter rod from which individual pieces of filter are cut.
  • Document US3377220 describes a station for processing a tow of filter material where a flow of steam from an external source is fed to an elongated chamber and brought into contact with the tow through a plurality of radial ducts.
  • This invention therefore has for an aim to provide a machine for making cigarette filters and a method for making cigarette filters to overcome the drawbacks mentioned above with reference to the prior art.
  • the aim of this invention is to provide a machine for making cigarette filters and a method for making cigarette filters capable of optimizing and making uniform the flow of steam which comes into contact with the tow.
  • the filter making machine and method of this invention allow obtaining a better distribution of the steam flow transversely to the tow to be treated.
  • the making machine 1 comprises a forming beam 2 configured to receive a tow 3 of filter material.
  • the tow 3 of filter material - cellulose acetate for example - comes from one or more processing stations, not illustrated.
  • the filter material is drawn out from compressed bales of filter tow material and made to advance through the above mentioned processing stations where it is first stretched and then impregnated with a plasticizing fluid such as triacetin, for example.
  • a plasticizing fluid such as triacetin
  • the channel 7 is adapted to receive the tow 3 and its transverse cross section changes along the main longitudinal direction 8 in such a way as to impart a predetermined shape to the tow 3 to form the rod 4.
  • the numeral 9 denotes porous conveyor means - for example, a conveyor belt made of material permeable to air and steam - configured to slide in the channel 7 of the forming beam 2 along the main longitudinal direction 8.
  • the conveyor means are also configured to carry the tow 3 along a feed path 10.
  • a mandrel 9a is used to make a rod 4 with a longitudinal hole in it suitable for making flow filters. Alternatively, the mandrel 9a may be omitted.
  • the conveyor means 9 are also adapted to comply with the shape of the transverse cross section of the channel 7 and to be at least partly wrapped around the tow 3. Preferably, in the configuration where the conveyor means 9 are wrapped as far as possible circumferentially around the tow 3, the conveyor means 9 do not overlap and leave a portion 11 ( Figure 3a ) of the tow 3 uncovered.
  • the forming beam 2 comprises a base 12 and a cover 13 closable over the base 12 along a plane parallel to the main longitudinal direction 8 to form the channel 7.
  • the base 12 has one half-portion of the channel 7, for example, the lower half-portion
  • the cover 13 has the other half-portion of the channel 7, for example, the upper half-portion, so that the channel 7 is obtained in a configuration where the cover 13 is fitted over the base 12.
  • the making machine 1 comprises at least one treatment station 14 located along the feed path 10 and comprising at least one nozzle 15 configured to blow a flow of steam into the internal channel 7 transversely thereto.
  • Figure 1 shows three treatment stations 14 distributed along the feed path 10. In alternative embodiments, there may be one or more treatment stations 14 distributed in various ways along the feed path 10.
  • the nozzle 15 comprises a plurality of planar sectors 16a-16e positioned transversely to the internal channel 7.
  • the planar sectors 16a-16e are in communication with each other, defining an overall, uninterrupted planar flow orifice 17 around the internal channel 7.
  • the overall planar flow orifice 17 is shown in Figure 3a and is suitable for producing a steam blade leading into the channel 7.
  • the overall planar flow orifice 17 is in direct communication with a steam feed duct 18 positioned around the channel 7, for example at a lateral section of the feed duct itself which, in Figure 3a is schematically represented by the dashed line "T".
  • the numeral 19 denotes an inlet duct of the feed duct 18, for example formed in the base 12 of the forming beam 2.
  • the inlet duct 19 defines a steam flow direction 19a.
  • planar sectors 16a-16e run parallel to the steam flow direction 19a along the inlet duct 19.
  • planar sectors 16a-16e run parallel to one side of the feed path "A", for example parallel to the arms 18a, 18c of the feed duct 18.
  • Each planar sector 16a-16e defines a corresponding flow orifice 17a-17e in direct communication with the steam feed duct 18.
  • the flow orifices 17a-17e correspond to portions of the overall planar flow orifice 17.
  • Each flow orifice 17a-17e has a respective thickness "Sa"-"Se" measured along the main longitudinal direction 8. At least two of the flow orifices 17a-17e differ in thickness.
  • the lateral planar sectors 16a, 16b have respective thicknesses "Sa", “Sb” which are greater than the thickness "Sc" of the front planar sector 16c and/or the thickness "Sd" of the rear planar sector 16d.
  • the lateral planar sectors 16a, 16b have respective thicknesses "Sa", “Sb” which are the same and preferably between 0.3 mm and 0.9 mm.
  • the front planar sector 16c and the rear planar sector 16d have respective thicknesses "Sc" and "Sd” which are the same and preferably between 0.25 mm and 0.8 mm.
  • the compensating planar sector 16e has a thickness "Se" which is less than the thickness "Sc" of the front planar sector 16c and/or the thickness "Sd" of the rear planar sector 16d.
  • the compensating planar sector 16e has a thickness "Se” of between 0.20 mm and 0.25 mm.
  • compensating means 23 are provided which are interposed between at least one portion 21, 22 of the insert 20 and the cover 13 and/or the base 12, respectively.
  • the compensating means are interposed between the portion 21, which is located above the channel 7, and the cover 13.
  • the compensating means are configured to keep the position of the two portions 21, 22 relative to each other unchanged when the working distance between the base 12 and the cover 13 is changed. In effect, this working distance may be adjusted as a function of the diameter of the rod 4 to be made.
  • the compensating means 23 comprise at least one elastic element, preferably a spring 24.
  • This invention also relates to a method for making cigarette filters and which can be implemented, for example, by a making machine as described above.
  • the method comprises a step of inserting a tow 3 of filter material impregnated with a plasticizing fluid into the channel 7 of the forming beam 2.
  • the tow 3 is carried along the feed path 10 by porous conveyor means 9.
  • the method also comprises a step of blowing a flow of steam into the channel 7 transversely thereto by means of a nozzle 15.
  • the step of blowing the steam is carried out by differentiating the thickness of the orifice 17 for steam flow through the nozzle 15.
  • the thickness of the orifice 17 for flow through the nozzle is differentiated according to the position of the feed duct 18 relative to the inlet duct 19.
  • the machine 1 comprises a main channel 25 which feeds all the treatment stations 14, in particular all the inlet ducts 19 located along the forming beam.
  • the steam follows the flow direction 19a along the inlet duct 19 and enters along the feed path "A" defined by the feed duct 18.
  • the feed path is optimized because it leads directly into the flow orifices 17a-17e (and thus into the overall flow orifice 17) without excessive load losses and expansions. More specifically, the lateral section "T" of the feed duct surrounds and circumscribes the overall planar flow orifice to provide a direct steam supply flow.
  • the steam flow is distributed uniformly and optimally.
  • the lateral planar sectors 16a, 16b are greater in thickness in order to compensate for the lateral position relative to the inlet duct 19.
  • the presence of the compensating planar sector 16e of reduced thickness allows compensating for the absence of the conveyor means 9 at the tow portion 11 and thus for the smaller load losses which the steam meets before penetrating the tow.
  • At least one treatment station 14 located along the feed path 10 comprises at least one nozzle 15 configured to blow a flow of steam into the internal channel 7 transversely thereto.
  • the nozzle 15 is an insert 20 placed around the internal channel 7 and comprising at least two portions 21, 22 made separately.
  • the forming beam 2 comprises a base 12 and a cover 13 closable over the base 12 along a plane parallel to the main longitudinal direction 8 to form the internal channel 7, and the portions 21, 22 of the insert 20 are associated with the base 12 and the cover 13, respectively.
  • the compensating means 23 are interposed between at least one portion 21, 22 of the insert 20 and the cover 13 and/or the base 12, respectively.
  • the compensating means 23 comprise at least one elastic element, preferably a spring 24.
  • the presence of the plurality of planar sectors 16a-16e as described above is a secondary, optional feature.

Landscapes

  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Claims (18)

  1. Maschine zur Herstellung von Zigarettenfiltern, umfassend:
    - einen Formungsbalken (2), aufweisend einen innenseitigen Kanal (7), der sich entlang einer Hauptlängsrichtung (8) erstreckt und ausgelegt ist, um einen Strang (3) von Filtermaterial zu empfangen, der mit einem plastifizierenden Fluid imprägniert ist, wobei der Kanal (7) einen Querschnitt aufweist, der seine Form entlang der Hauptlängsrichtung (8) ändert, um dem Strang (3) eine gewünschte Form zu verleihen, um einen durchgehenden Stab (4) aus Filtermaterial zu formen;
    - poröse Fördermittel (9), die konfiguriert sind, um im Kanal (7) des Formungsbalkens (2) entlang der Hauptlängsrichtung (8) verschoben zu werden, und um den Strang (3) entlang eines Zuführungswegs (10) zu fördern, wobei die Fördermittel ausgelegt sind, um mit der Form des Querschnitts des innenseitigen Kanals (7) übereinzustimmen und wobei sie mindestens teilweise um den Strang (3) gewickelt sind;
    - mindestens eine Bearbeitungsstation (14), die entlang des Zuführungswegs (10) angeordnet ist und mindestens eine Düse (15) umfasst, die konfiguriert ist, um einen Dampfstrom in den innenseitigen Kanal (7) quer dazu zu blasen, dadurch gekennzeichnet, dass die Düse (15) eine Vielzahl an ebenflächigen Sektoren (16a-16e) umfasst, die quer zum innenseitigen Kanal (7) positioniert sind, wobei ein jeder ebenflächiger Sektor (16a-16e) eine ebenflächige Strömungsöffnung (17a-17e) definiert, die direkt in Kommunikation mit einer Dampfzuführungsleitung (18) angeordnet ist, positioniert rund um die Strömungsöffnungen und den innenseitigen Kanal (7), wobei mindestens zwei Strömungsöffnungen (17a-17e) unterschiedliche Dicken (Sa-Se) entlang der Hauptlängsrichtung (8) aufweisen.
  2. Herstellungsmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Düse (15) mindestens zwei seitliche ebenflächige Sektoren (16a, 16b) aufweist, die seitlich des innenseitigen Kanals (7) relativ zu einer Einlassleitung (19) der Zuführungsleitung (18) angeordnet sind, wobei mindestens ein frontseitiger ebenflächiger Sektor (16c) zwischen der Einlassleitung (19) der Zuführungsleitung (18) und dem innenseitigen Kanal (7) angeordnet ist, und mindestens ein rückseitiger ebenflächiger Sektor (16d) an der anderen Seite des innenseitigen Kanals (7) relativ zur Einlassleitung (19) angeordnet ist, wobei die seitlichen ebenflächigen Sektoren (16a, 16b) unterschiedliche Dicken (Sa, Sb) aufweisen, die größer sind als die Dicke (Sc) des frontseitigen ebenflächigen Sektors (16c) und/oder die Dicke (Sd) des rückseitigen ebenflächigen Sektors (16d).
  3. Herstellungsmaschine nach Anspruch 2, dadurch gekennzeichnet, dass die Düse (15) einen ausgleichenden ebenflächigen Sektor (16e) aufweist, der auf einen Abschnitt des Strangs (3) zeigt, der nicht von den porösen Fördermitteln (9) umwickelt ist, wobei der ausgleichende ebenflächige Sektor (16e) eine Dicke (Se) aufweist, die kleiner ist als die Dicke (Sc) des frontseitigen ebenflächigen Sektors (16c) und/oder die Dicke (Sd) des rückseitigen ebenflächigen Sektors (16d) .
  4. Herstellungsmaschine nach Anspruch 3, dadurch gekennzeichnet, dass der ausgleichende ebenflächige Sektor (16e) eine Dicke (Se) zwischen 0,20 mm und 0,25 mm aufweist.
  5. Herstellungsmaschine nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass der ausgleichende ebenflächige Sektor (16e) an der anderen Seite des innenseitigen Kanals (7) relativ zur Einlassleitung (19) an einer mittigen Position zwischen den rückseitigen ebenflächigen Sektoren (16d) angeordnet ist.
  6. Herstellungsmaschine nach einem oder mehreren der Ansprüche 2-5, dadurch gekennzeichnet, dass die seitlichen ebenflächigen Sektoren (16a, 16b) jeweilige Dicken (Sa, Sb) aufweisen, die identisch sind und vorzugsweise zwischen 0,3 mm und 0,9 mm betragen.
  7. Herstellungsmaschine nach einem oder mehreren der Ansprüche 2-6, dadurch gekennzeichnet, dass die frontseitigen ebenflächigen Sektoren (16c) und der rückseitige ebenflächige Sektor (16d) jeweilige Dicken (Sc, Sd) aufweisen, die identisch sind und vorzugsweise zwischen 0,25 mm und 0,8 mm betragen.
  8. Herstellungsmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die ebenflächige Strömungsöffnung (17a-17e) in Kommunikation mit der Zuführungsleitung (18) an einem seitlichen Abschnitt (T) der Zuführungsleitung (18) steht.
  9. Herstellungsmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die ebenflächigen Sektoren (16a-16e) in gegenseitiger Kommunikation miteinander sind und eine ununterbrochene ebenflächige Strömungsöffnung (17) rund um den innenseitigen Kanal (7) definieren.
  10. Herstellungsmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Zuführungsleitung (18) sich entlang eines Zuführungswegs (A) erstreckt, der eine mehreckige, vorzugsweise eine rechteckige Form aufweist, wobei die ebenflächigen Sektoren (16a-16e) parallel zu einer Seite des Zuführungswegs (A) verlaufen.
  11. Herstellungsmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die ebenflächigen Sektoren (16a-16e) parallel zu einer Dampfstromrichtung (19a) entlang der Einlassleitung (19) der Zuführungsleitung (18) verlaufen.
  12. Herstellungsmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es sich bei der Düse (15) um einen Einsatz (20) handelt, der rund um den innenseitigen Kanal (7) angeordnet ist und mindestens zwei Abschnitte (21, 22) umfasst, die separat ausgebildet sind.
  13. Herstellungsmaschine nach Anspruch 12, dadurch gekennzeichnet, dass der Formungsbalken (2) eine Basis (12) und eine Abdeckung (13) umfasst, die über der Basis (12) entlang einer Ebene verschließbar ist, die parallel zur Hauptlängsrichtung (8) angeordnet ist, um den innenseitigen Kanal (7) zu bilden, und dadurch, dass die Abschnitte (20, 21) des Einsatzes (20) jeweils mit der Basis (12) und der Abdeckung (13) assoziiert sind.
  14. Herstellungsmaschine nach Anspruch 13, dadurch gekennzeichnet, dass sie Ausgleichsmittel (23) umfasst, die zwischen mindestens einem Abschnitt (21) jeweils des Einsatzes (20) und der Abdeckung (13) und/oder der Basis (12) eingesetzt sind, wobei die Ausgleichsmittel konfiguriert sind, um die Position der zwei Abschnitte (21, 22) relativ zueinander unverändert beizubehalten, wenn der Arbeitsabstand zwischen der Basis (12) und der Abdeckung (13) geändert wird.
  15. Herstellungsmaschine nach Anspruch 14, dadurch gekennzeichnet, dass die Ausgleichsmittel (23) mindestens ein elastisches Element umfassen, vorzugsweise eine Feder (24).
  16. Herstellungsmaschine nach einem oder mehreren der Ansprüche 12 bis 15, dadurch gekennzeichnet, dass die zwei Abschnitte (21, 22) an einer Ebene gekuppelt sind, die parallel zur Hauptlängsrichtung (8) verläuft.
  17. Verfahren zur Herstellung von Filterzigaretten, umfassend die folgenden Schritte:
    - Einfügen eines Strangs (3) von Filtermaterial, das mit einem plastifizierenden Fluid imprägniert ist, in einen innenseitigen Kanal (7) eines Formungsbalkens (2), wobei sich der Kanal (7) entlang einer Hauptlängsrichtung (8) erstreckt und einen Querschnitt aufweist, der sich entlang der Hauptlängsrichtung ändert, um dem Strang (3) eine gewünschte Form zu verleihen, um einen durchgehenden Stab (4) aus Filtermaterial zu formen;
    - Fördern des Strangs (3) entlang eines Zuführungswegs (10) durch die Wirkung poröser Fördermittel (9), die konfiguriert sind, um im Kanal (7) des Formungsbalkens (2) entlang der Hauptlängsrichtung (8) verschoben zu werden, wobei die Fördermittel mit der Form des Querschnitts des innenseitigen Kanals (7) übereineinstimmen und wobei sie mindestens teilweise um den Strang (3) gewickelt sind;
    - Blasen eines Dampfstroms in den innenseitigen Kanal (7) quer dazu mittels einer Düse (15), die entlang des Zuführungswegs (10) angeordnet ist, dadurch gekennzeichnet, dass der Schritt zum Blasen des Dampfs den Schritt zum Differenzieren der Dicke (Sa-Se) einer Öffnung (17a-17e) für den Dampfstrom durch die Düse (15) umfasst.
  18. Verfahren zur Herstellung von Filterzigaretten nach Anspruch 17, dadurch gekennzeichnet, dass die Dicke (Sa-Se) der Öffnung (17a-17e) zur Durchströmung durch die Düse (15) je nach der Position relativ zu einer Einlassleitung (19) einer Zuführungsleitung (18) für den Dampfstrahl differenziert ist.
EP17704538.2A 2016-01-21 2017-01-17 Maschine zur herstellung von zigarettenfiltern und verfahren zur herstellung von zigarettenfiltern Active EP3405049B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUB20160197 2016-01-21
PCT/IB2017/050237 WO2017125849A1 (en) 2016-01-21 2017-01-17 Machine for making cigarette filters and method for making cigarette filters

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EP3405049A1 EP3405049A1 (de) 2018-11-28
EP3405049B1 true EP3405049B1 (de) 2020-03-04

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