EP1683432A1 - Verfahren und Vorrichtung zur Herstellung eines Vlieses für die Herstellung von Filterstäben - Google Patents

Verfahren und Vorrichtung zur Herstellung eines Vlieses für die Herstellung von Filterstäben Download PDF

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Publication number
EP1683432A1
EP1683432A1 EP06009384A EP06009384A EP1683432A1 EP 1683432 A1 EP1683432 A1 EP 1683432A1 EP 06009384 A EP06009384 A EP 06009384A EP 06009384 A EP06009384 A EP 06009384A EP 1683432 A1 EP1683432 A1 EP 1683432A1
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EP
European Patent Office
Prior art keywords
fibers
conveyor
fiber
filter
separating
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.)
Withdrawn
Application number
EP06009384A
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German (de)
English (en)
French (fr)
Inventor
Sönke Horn
Stephan Wolff
Thorsten Scherbarth
Alexander Buhl
Peter-Franz Arnold
Uwe Heitmann
Irene Maurer
Jan Peisker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koerber Technologies GmbH
Original Assignee
Hauni Maschinenbau GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from EP03007675A external-priority patent/EP1464239B1/de
Application filed by Hauni Maschinenbau GmbH filed Critical Hauni Maschinenbau GmbH
Priority to EP06009384A priority Critical patent/EP1683432A1/de
Publication of EP1683432A1 publication Critical patent/EP1683432A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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

  • the invention relates to a method and an apparatus for producing a nonwoven fabric for the production of filter rods of the tobacco processing industry, wherein the generic device comprises at least one separating device by means of fibers of at least one sort filter material are singled, and a conveyor on which the isolated fibers aufschauerbar are to form a fleece.
  • a method for the preparation of filter materials and a corresponding device for the preparation of filter materials for the production of filters of the tobacco processing industry is known from GB 718 332.
  • a tobacco cutter by means of a tobacco cutter, snippets of a material are produced and fed to a stranding machine, similar to a cigarette rod making machine, the chips being impregnated with a chemical agent to prevent an undesirable taste and to prevent the snippets from falling out of the end pieces of the correspondingly made filters.
  • the cut chips are conveyed by means of a roller in the effective range of a spiked roller, and conveyed by means of the spiked roller from the roller on a conveyor belt to be subsequently fed to a further spiked roller, from which the chips are knocked out by means of another spiked roller and be supplied to a format in which the filter strand is formed with a wrapping strip.
  • the snippets are made of materials such as paper, cellulose, textiles, synthetic materials or similar. and have a structure similar to cut tobacco.
  • a filler for cigarette filters is produced by passing a strip or stream of continuous fibers of the filler onto a spiked roller which is driven at a speed such that the fibers are torn by the spikes into pieces of irregular length and from the Roller be issued in arbitrary orientation.
  • the torn fibers are shaken onto a conveyor belt and transferred to an uninterrupted carrier strip, which consists of the same or different filter materials.
  • the carrier strip and filler are then formed into a filter strand.
  • To form the filter strand this is fed to a strand forming machine, in which the carrier strip is compressed laterally and to be formed a continuous strand. It is thus made a filter strand in the longitudinal axial transport of the same. Subsequently, after production of the filter strand, the filter strand is cut to length in filter rods.
  • fibers of at least two types are separated into separate separating devices, wherein in particular a sort of fibers is singled out for each separating device, the effectiveness of the singling and thus the degree of separation can be increased. It is expedient to bring the separated fibers together just before the conveyor, so that in the process management a pre-mixing of fibers can be omitted.
  • the quality of the forming web can be increased since the separation of the fibers into at least two types of filter material in separate separating devices, wherein in particular one sorting filter material is singled out for each separating device, leads to an increased degree of separation, which subsequently leads to a more homogeneous fiber distribution in the quilted nonwoven.
  • both the quality of the nonwoven fabric is increased, as well as the resulting filter strand and the filter rods cut to length from this later.
  • the separating devices each comprise at least one separating element, which rotate about axes of rotation which are aligned substantially parallel to the conveying direction of the conveyor, a more uniform distribution of the fibers on the conveyor can be achieved.
  • the churning of the fibers or of the filter material takes place from the top onto the conveyor. As a result, a compact process control is possible.
  • one type of fiber is a multiple-component fiber, especially bicomponent fiber, very efficient filter strands or filter rods can be produced.
  • the multiple-component fibers or bicomponent fibers make it possible in a simple manner to connect the fibers in the filter strand or filter rod.
  • the multicomponent fibers, in particular bicomponent fibers comprise a core and a shell of different material, wherein the filler material has a lower melting point than the core material.
  • a very secure composite of the fibers can be produced in the filter, for which purpose the filter or the mixture of fibers, which acts as a filter material is available or from which the filter or the filter rod is made, is brought to a temperature which is slightly above the melting point of the shell material. In this way, a bonding of filter components is possible.
  • the sheath may be polyethylene (PE) and the core may be polyester or polyethylene terephthalate (PET), for example.
  • PET polyethylene terephthalate
  • the melting point of the shell is then at 127 ° C and the melting point of the core at 256 ° C. This gives a very dimensionally stable bicomponent fiber whose shell material has a lower melting point than the core material.
  • a Trevira bicomponent fiber for example and preferably used, is of type 255, has a denier of 3.0 dtex, a cut length of between 3 and 6 mm, a core of PES (synthetic fiber of polyester), and a sheath of copolyethylene , wherein the shell or the shell is modified to increase adhesion, that is provided with additives that lead to a lower surface tension.
  • PES synthetic fiber of polyester
  • the filter materials can then adhere or stick over at least at points of contact with the multicomponent fibers or bicomponent fibers.
  • the shell softens or melts accordingly, so that an adhesive bond or adhesive bond to other components of the filter can arise at points of contact.
  • a very dimensionally stable filter is produced.
  • a filter rod with improved filter quality can be produced.
  • the Term granules also the term extrudate.
  • a preferred filter material or a preferred composition of filter material comprises 80% by weight to 95% by weight of activated carbon granules and 5% by weight to 20% by weight of fibers, in particular bicomponent fibers. It is also possible to produce filters which consist of various fibers, for example bicomponent fibers, cellulose fibers and activated carbon fibers, the component or fraction of bicomponent fibers being between 5 and 20% by weight (% by weight) and the proportion of cellulose fibers between 20 and 95% by weight % lies. The remainder may then consist, for example, of activated carbon fibers.
  • the transport and / or the separation of the fibers is preferably done with transport air, which can then be discharged substantially in the region of the conveyor by negative pressure.
  • the invention is further characterized by a device for producing a nonwoven fabric for the production of filter rods of the tobacco processing industry with at least one separating device, by means of the fibers of at least one sort filter material are singular, and a conveyor on which the individualized fibers are aufschauerbar to a nonwoven form, dissolved, wherein the at least one separating device comprises at least one rotating separating element, wherein the axis of rotation of the separating element is aligned substantially parallel to the conveying direction of the conveyor. Due to the rotating separating element, a particularly high degree of singulation of fibers can be achieved, as a result of which the density of the nonwoven fabric produced becomes very uniform.
  • the axis of rotation of the separating element is oriented essentially parallel to the conveying direction of the conveyor, an even more uniform density of the nonwoven can be achieved.
  • the degree of separation of the fibers can be increased.
  • the separating devices are then arranged next to each other in the conveying direction and not in a row.
  • the separation devices are designed to separate one type of fiber at a time.
  • singulating drums contained in the singulating devices have differently configured sieves which can be adapted to the respective fibers, for example the diameter and / or the length. If a delivery well is arranged downstream of the separation devices downstream of the conveying direction of the fibers, the separated fibers can be safely supplied to the conveyor.
  • a device for producing a nonwoven fabric for the production of filter rods of the tobacco-processing industry with at least two separating devices by means of which fibers of one sort of filter material can be singled, wherein each separating device is separable a conveyor shaft is provided and wherein the separating devices are configured separately from each other.
  • singling drums are preferably provided, for example, have different trained screens.
  • separate separating devices means in particular that they are arranged side by side in the conveying direction and not in succession. Fibers on one side arrive exclusively in one of the separated separating devices and not in another one of the separate separating devices.
  • a conveyor which is arranged downstream of the separating devices and is designed to watch individual fibers to form a nonwoven fabric, wherein the separating devices each comprise at least one separating element, the axis of rotation of which is oriented substantially parallel to the conveying direction of the conveyor, can be a very uniform Shuddering of the fibers in a non-woven fabric on the conveyor happen.
  • granules, powders, extrudates or other filter materials can be supplied through delivery chutes of the chamber.
  • the at least one separating device is arranged above the conveyor, is a very effective and space-saving Device feasible.
  • the filter material is thrown on top of the conveyor directly from above.
  • the conveyor is in the context of this invention, in particular a belt conveyor and in particular preferably a suction belt.
  • the fibrous web When wrapping the fibrous web with the wrapping material strip, the fibrous web is expediently shaped, so that a compact filter strand is formed.
  • energy is applied thereto during or after the wrapping of the fibrous web with the wrapping material strip to form a strong bond to the wrapping material
  • it is possible to make the filter relatively elastic and to ensure that no fiber material falls out at the cut edges of the filter or filter element.
  • the fibers have a length which is shorter than a filter or filter element separated from the fiber strand produced, particularly homogeneous filter properties are possible.
  • the fibers which are preferably to be used are thus elongated and relatively thin.
  • additives such as activated carbon granules, triacetin or latex are preferably added to the fibers, the filter properties are particularly easy to adjust.
  • Activated carbon granules are added, for example, prior to complete singulation of the fibers or to the fibers being transported to the conveyor.
  • Triacetin or latex as a binder are added, for example, to the quenched fiber fleece in the region of the conveyor.
  • the nonwoven fabric is compacted prior to the step of applying to the wrapping strip, a particularly uniform compaction can be ensured.
  • the compression preferably takes place both vertically and horizontally, that is, for example, from above and below as well as from the sides of the fiber fleece.
  • the fibrous web becomes prior to application to the wrapping strip shaped.
  • the forming step may provide at least the formation of a semicircle transversely to the conveying direction of the nonwoven.
  • a full circle or oval is formed.
  • a filter or filter element is made by the aforesaid filter strand manufacturing process by subsequent cutting to length from the produced filter strand.
  • a filter strand manufacturing apparatus comprising a chiller device by which singulated filter materials are transported onto a conveyor to form a nonwoven fabric, a format apparatus in which a wrapping material is wrapped around the nonwoven fabric, and means for transferring the nonwoven fabric from the conveyor to the conveyor
  • a chiller device by which singulated filter materials are transported onto a conveyor to form a nonwoven fabric
  • a format apparatus in which a wrapping material is wrapped around the nonwoven fabric
  • a particularly homogeneous nonwoven fabric By transporting the separated filter materials by means of transport air, a particularly homogeneous nonwoven fabric can be produced, so that a particularly homogeneous filter strand and therefore particularly homogeneous filter or filter elements can be produced.
  • the filter properties are to be positively influenced.
  • the conveyor or a part of the conveyor is preferably part of the compacting device.
  • a particularly easy to implement filter strand manufacturing device is given when the conveyor comprises at least one suction belt. If the fibers to be processed are so small that the openings of the suction belt clog quickly, it is advantageous to work with two additional suction belts, each in the approximately right Angles are arranged on both sides of the first suction belt.
  • a particularly effective transfer of the nonwoven fabric is done by means of compressed air, through which the nonwoven fabric is removable from the conveyor.
  • the device for transferring the nonwoven fabric comprises a conveyor belt
  • the conveyor belt is a suction belt.
  • a particularly preferred embodiment is given when the conveyor belt is bent transversely to the transport direction. In this way, for example, a filter strand which is round or oval in cross-section can be produced in a simple manner.
  • two conveyor belts are provided, which transport the fiber fleece between them.
  • the conveyor belts are designed such that the nonwoven fabric is round or oval malleable.
  • the conveyor belts for example, each form a semicircle or a half oval.
  • the device for transferring the nonwoven fabric comprises a nozzle through which the nonwoven fabric is transportable.
  • the nozzle is designed such that the nonwoven fabric is round or oval malleable.
  • a separating device 10 is shown in a schematic three-dimensional representation.
  • This is a variant of a separating device 10 which is disclosed in a further European patent application of the applicant entitled "Process for the preparation of finite fibers and fining fiber preparation device for use in the production of filters", No. 03 007 672.3 is.
  • the subject of this patent application is that of preparing fibrous material intended for use in the manufacture of filters, in order to obtain substantially completely separated fibers and thus a homogeneous filter strand to be produced from these fibers.
  • the separating device 10 from FIG. 1 is used for this purpose. the filter material or fiber material is already voraughtzelt in advance and accordingly dosed.
  • the essentially unaccurate fiber material or fiber / fiber group mixture 49 is, for example, as shown schematically in FIG. 4, moved via a stowage shaft 44 and feed rollers 46 into the effective range of a spiked roller 76, which pretreats the fiber / fiber group mixture knocks.
  • This fiber / fiber group mixture 49 is then gem by the air streams 19 in the screening drums 21.
  • Fig. 1 transported. This takes place via lateral openings 20 in the housing 22.
  • the fiber material is blown in the direction of the longitudinal axes of the screening drums 21.
  • the two-sided blowing of the fiber material counterclockwise results in a circumferential annular flow 23.
  • the annular flow 23 is superimposed by a flow normal or substantially perpendicular to this, which is caused by a negative pressure applied to the fluidized bed 14 and an air flow 13.
  • Airflow 13 is an option for larger, heavier fibers, which is not always necessary.
  • the negative pressure prevailing at the fluidized bed end 14 is created by the negative pressure in a suction belt conveyor, not shown, which is arranged at the fluidized bed end 14 and the other by the air flow 17, which is conveyed through the suction nozzle 16.
  • the normal flow starts above the sieve drums 21 and begins and passes through the sieve drums 21 via their shell openings. The normal flow then passes into the fluidized bed region 11 and passes through it to the end of the 14th
  • the ununsulated or substantially unaccompanied fiber material passes in the drums 21 on the inner circumferential surfaces of the drums 21.
  • the drums 21 rotate in a direction of rotation 24 of the screening drums 21 in a clockwise direction.
  • the stored on the drum shell surfaces, essentially unaccompanied fiber material is fed to the separating rollers 26 from the rotating drums.
  • the separating rollers 26 rotate in the direction of rotation 25 counterclockwise. It would also be possible as an alternative, a clockwise rotation. It can also be used all other elastic rotary variants.
  • the fiber groups are thrown so long against the inner surface of the drums 21 until they have dissolved in individual fibers and have passed the shell openings or can pass through the shell openings.
  • a drum with perforated plates or Rundstabgitter can be provided instead of a sieve drum 21, a drum with perforated plates or Rundstabgitter can be provided.
  • the fibers or individual fibers are detected by an air flow and guided or sucked through the radial openings of the drum.
  • the air flow conveys the fibers down to the fluidized bed. Once the fiber-laden flow has reached the fluidized bed, it is deflected and guided along the curved fluidized bed. Due to the centrifugal forces acting on the fibers, the fibers move to the curved guide wall and flow to the suction belt conveyor.
  • the air flowing in above the fibers is deposited on the wedge or separator 15 and discharged via the suction nozzle 16.
  • Fig. 1 the corresponding fiber streams 18 are shown schematically.
  • individual fibers are detected by an air stream 13 emerging from the nozzle bar 12 and are also supplied to the fluid bed end 14 accordingly. It can also be provided more nozzle strips.
  • Fiber groups that in a single drum passage through the drums 21 were not or not completely separated, pass with the ring flow 23 in the respective parallel drum 21.
  • the separating device shown in Fig. 1 corresponds at least partially to that described in WO 01/54873 A1 and US 4, 640, 810 A of the company Scanweb, Denmark, or USA, are disclosed.
  • the singling is done essentially by interaction of the drums 21 with the rollers and an air flow and in particular by the fact that only isolated fibers have the opportunity to pass through the openings of the drum 21.
  • the flow divider 15 is provided in order to separate air from the fibers.
  • FIG. 2 shows a schematic view of a strand production machine 9.
  • FIG. 3 shows a part of the strand production machine 9 according to the invention from FIG. 2 in a plan view in the direction of the arrow A of FIG. 2 and
  • FIG. 4 shows a side view of the strand production machine 9 according to the invention.
  • Fig. 2 in the direction of arrow B.
  • the unaccurate fiber material 49 passes via the stowage shaft 44 to the metering device 46 or 76, comprising two feed rollers 46, a metering channel which is arranged between the feed rollers 46 and the spiked roller 76 and a spiked roller 76.
  • the direction of the material entry 47 is shown in FIG in drawing plane down, as shown schematically there.
  • the unripe fiber material 49 is singled in the separation chamber 10. The separation takes place by an interaction of the separating rollers 26 with an air flow 50 and openings in a grid 77, which separates the separation chamber 10 from the space associated with the fluidized bed 11.
  • the air flow generated by the air flow in the exhaust pipe 16 on the fluidized bed 11 promotes the separated fibers 27.
  • the air flow 17 in the exhaust pipe 16 is with respect to its direction in Fig. 3 up out of the plane, as shown in Fig. 3.
  • the air flow 17 also transports excess fibers.
  • the air flow 28 serves to hold and compress the fibers 27 which have been quenched on the suction belt 43 of the suction belt conveyor 32.
  • the separated fibers 27 move on the fluidized bed 11 in the direction of the fluidized bed end 14, on which a suction belt conveyor 32 is arranged.
  • Saugbandreaer 28 prevails by continuous air suction vacuum. This air suction is shown schematically by the air flow 28.
  • the negative pressure sucks the separated fibers 27 and holds them on the air-permeable suction belt of the suction belt conveyor 32.
  • the suction belt 43 moves in the direction of strand production machine 9, that is, in Fig. 2 to the left.
  • a fiber cake 29 or fiber stream 29, which increases almost linearly in the direction of the stranding machine 9, is formed on the suction belt.
  • the heaped-up fiber stream 29 has different strengths and is trimmed at the end of the filling zone of the suction belt conveyor by trimming by a trimming device 31 to a uniform thickness.
  • the trimming device 31 may be a mechanical one such as, for example, trimmer discs or a pneumatic, by means of air nozzles, for example.
  • the mechanical trim is known per se in cigarette rod making machines.
  • the pneumatic trim is done in such a way that in the end of the fiber stream 29, a nozzle is arranged horizontally, from which an air jet emerges and tears off a part of the fiber stream 29, so that excess fibers 30 are removed. It can find a spot jet nozzle or a flat jet nozzle use.
  • the fiber stream 29 is split into a trimmed fiber strand 33 and a strand of excess fibers 30. It is also possible to grasp and tear away all fibers below a trimming condition from a jet. The excess fibers are returned to the fiber preparation process and later re-formed into a fiber strand.
  • the trimmed fiber strand 33 is held on the suction belt 43 and moved in the direction of the stranding machine 9.
  • the trimmed fiber strand 33 is a loose nonwoven fabric which is compressed by a compacting belt 35.
  • a roller such as, for example, a press disk 55 (see, for example, FIG. It can also be used several bands or rolls or discs use.
  • the compression belts 48 are shown, which are conical to each other and in Saugband york with the fiber cake.
  • the toothed shape of the compression bands 48 create zones of different density in the compacted fiber cake. In the higher density zones, the filter strand is cut later.
  • the higher fiber density in the filter end area ensures a more compact cohesion of the fibers in this sensitive zone and, in addition, a better processability of the filter rods.
  • a compression belt 35 is provided in FIG.
  • the trimmed and compacted fiber strand 34 is transferred to the stranding machine 9.
  • the transfer takes place by detaching the compacted fiber strand 34 from the suction belt 43 and placing the fiber strand 34 on a format strip or on a wrapping material strip which is applied to a format strip of the stranding machine 9.
  • the format tape is not shown in the figures. This can be a conventional format strip which is also used in a normal filter rod machine or cigarette rod machine.
  • the transfer is supported by a nozzle 36 directed from above onto the compacted fiber strand 34 and through which an air flow 37 flows.
  • a fiber filter strand 38 is formed, wherein from a bobbin 41, a wrapping material strip 42 is withdrawn and wound around the fiber material as usual.
  • binding components contained in the fiber mixture are superficially heated and fused.
  • the outer layers of bicomponent fibers that may be included in the fiber blend may also be fused to form a bond between the fibers.
  • fiber materials a variety of fibers can be used, which are suitable for the desired filter properties.
  • cellulose acetate, cellulose, carbon fibers and multicomponent fibers, in particular bicomponent fibers are suitable as fiber materials.
  • the different types of fiber are preferably mixed prior to strand formation. It is also possible to add at least one additive.
  • the additive is, for example, a binder such as latex or triacetin or granular material which binds components of the cigarette smoke particularly effectively, such as, for example, activated carbon granules.
  • the fiber length of the fibers used is smaller than the length of the filter or filter element to be produced.
  • the length of the fibers should therefore be between 0.1 mm and 30 mm and in particular between 0.2 mm and 10 mm.
  • the length of the filter to be produced is a conventional filter for a cigarette or a filter segment in multi-segment filters of cigarettes.
  • the average fiber diameter in the range of 10 to 40 .mu.m, in particular 20 to 38 microns and more preferably between 30 and 35 microns, a very homogeneous filter can be produced.
  • the curing device 39 may include a microwave heater, a laser heater, heating plates or sliding contacts. By heating the binding components, for example, the outer layer of bicomponent fibers or latex, the individual fibers combine in the fiber strand and merge superficially.
  • the curing device 39 may also allow for drying of binder added in liquid form. Upon cooling of the fiber strand, the melted areas of the heated binding components harden again. The resulting lattice framework gives the fiber strand stability and hardness.
  • the cured fiber filter strand 38 is cut into filter rods 40.
  • the curing of the filter is possible even after cutting into the filter rods 40.
  • FIG. 5 shows an embodiment according to the invention of a strand production machine 9 in a schematic representation.
  • 6 shows a part of the strand-making machine 9 in a plan view in the direction of the arrow A of FIG. 5
  • FIG. 7 shows a side view of the strand-making machine 9 according to FIG. 5 in the direction of the arrow B.
  • the singulated fiber material 27 is thrown onto the suction belt 43 from above in this exemplary embodiment, specifically in the transport direction 74.
  • the separating device 10 which is also shown schematically in FIGS. 5 to 7, represents a modified form of the separating device 10
  • In the separating chamber 45 are screening drums 21 which rotate in the direction of the arrow.
  • the spiked rollers 26 are also used in this case to strike the not yet isolated fiber material or the contiguous fiber groups apart in individual fibers, so that the separated fibers can pass through the outlet openings of the screen drum 21 in the hopper 53.
  • the isolated fibers 27 reach into the region of the suction belt conveyor 32, which is configured in this case with Saugbandwangen 57.
  • a homogeneous Aufschau für of the fibers 27 is done in particular by the fact that the screening drum 21 a separating roller 26th wherein the screening drum and the separating roller have longitudinal axes, in particular the separating roller 26 a rotation axis 91 which is aligned parallel or substantially parallel to the conveying direction 92 of the suction belt conveyor 43.
  • the fiber fleece 29 or the fiber stream 29 can be thrown on the conveyor 43 very uniformly.
  • a corresponding fiber stream 29 is thrown on the suction belt 43.
  • Excess fiber material 30 is removed by a trimmer 31 from the remaining fiber strand 33 above it.
  • the trimmed fiber strand 33 is compressed by means of a pressing disk 55 which is at the same time the rearward strand of the suction belt 43 'in the conveying direction of the strand.
  • a negative pressure field 54 is generated by means of an air flow 28.
  • an air flow 37 is provided, which hits through the nozzle 36 on the suction belt.
  • the compacted fiber strand 34 is then removed from the suction belt 43 'by means of an air flow 37 through the nozzle 36 and transferred to a format 56.
  • the compacted fiber strand 34 as usual reaches a wrapping material strip 42, which is conveyed on a format strip.
  • the remaining process steps correspond to those according to FIGS. 2 to 4.
  • FIG. 8 shows a part of a further device in a schematic view.
  • the suction belt 43 is deflected around deflection rollers 59.
  • the trimming device is not shown in this illustration of FIG. In the region of the Aufschauerns of the fiber strand 29 reach isolated fibers 27 from below onto the fiber strand.
  • the fiber strand 33 reaches a wrapping material strip 42, which arrives at a format belt 58.
  • the format band 58 and the wrapping material strip 42 are deflected by corresponding rollers 59.
  • the fiber strand 44 reaches the wrapping material strip 42.
  • the beginning of the format 56 is wound in the usual manner of the wrapping material strip 42 around the fiber strand 33.
  • Fig. 9 is a plan view of the device of Fig. 8 is shown, in particular a particularity of the side cheeks 57 is disclosed.
  • the side cheeks 57 which in fact also adjoin the fiber strand 29 or 33, are configured as suction belts 43, which in turn are deflected around deflection rollers 59 again.
  • suction belts 43 which in turn are deflected around deflection rollers 59 again.
  • Fig. 10 shows a schematic three-dimensional representation of a device for transferring the fiber strand from the suction belt 43 on the format 56 and in particular on the wrapping material strip 42.
  • the fiber strand which is not shown in this figure, comes from the lower portion of the suction belt 43, the is deflected over the guide roller 59, in the free space of the opposing belts 62nd
  • the belts 62 which may in particular also be steel belts, are deflected by rollers 63.
  • the design of the bands 62 results in a corresponding round cavity between two opposite bands 62. Through this cavity with a round cross section of the fiber strand 34 passes and is placed on the wrapping material strip 42.
  • the transfer device By the transfer device, a preforming of the fiber strand 34 and possibly further compression is possible.
  • the Saugbandwangen 57 are designed as a solid side walls.
  • FIG. 11 shows a section of a strand production device 9 in a schematic representation.
  • the correspondingly compacted fiber strand passes into a nozzle 66 and is further conveyed by means of an air stream 67 onto a wrapping material strip 42 which rests on a format belt 58. Subsequently, the fiber strand is wrapped as usual with the wrapping material strip 42 to form a fiber filter strand 38.
  • FIG. 12 shows a section of a further strand production device 9 in a schematic representation.
  • the fiber strand 33 conveyed by the suction belt 43 passes into the effective region of a nozzle 68, which applies compressed air 69 to the fiber strand in the region of the deflection roller 65 and thereby removes the fiber strand 33 from the suction belt 43.
  • the angle of the nozzle or the compressed air acting on the fiber strand 33 is adjustable. After detachment of the fiber strand 33 from the suction belt 43, this passes into the annular nozzle 70.
  • the air 67 flowing through the nozzle slot 71 can fulfill various functions, depending on the nozzle design.
  • the function is always such that the vacuum prevailing in the nozzle inlet channel of the nozzle 70 dissolves the fiber strand 33 from the suction belt 43 running on the deflection roller 65, which may also be designed as a pressure disk 65.
  • the fiber strand can through Influencing the compressed air 67 on the fiber strand at certain angles allow conveying the fiber strand in the first format-forming hollow cone 72.
  • the compressed air 67 dissolves the strand into individual fibers or fiber groups and thus promotes the individual fibers or fiber groups in the first format-forming hollow cone 72.
  • the compressed air dissolves the strand into individual fibers or fiber groups and thus promotes the individual fibers or fiber groups in the first format-forming hollow cone 72.
  • the format strip 58 runs with the wrapping material strip 42 lying thereon.
  • the second hollow cone 73 has a smaller taper than the first hollow cone 72.
  • ventilation holes In the first format-forming hollow cone 72 are ventilation holes. These vent holes provide for the air separation of the nozzle air 69 and 67th
  • the fiber strand 33 is transferred as a fiber strand, this is formed in the format-forming hollow cones 72 and 73 from above and from the format in progress format tape 58 from below.
  • the complete transfer of the fiber strand 33 onto the format strip or wrapping material strip 42 takes place under the hollow cone 73.
  • the tapering of the hollow cone occurs a congestion of the individual fibers and fiber groups, so that forms a new fiber strand.
  • the strand is formed completely in the second hollow cone 73 and transferred at the end of the second hollow cone 73 to the format strip or the wrapping material strip 42.
  • the wrapping material strip 42 is wound around the strand as usual and sealed so as to form the fiber filter strand 38.
  • the invention is to form filter materials made of fine fibers with or without appropriate additives such as. Kohleeducationgranulat or powder in homogeneous filter strands. Accordingly, the various elements or devices are designed to optimally transport, hold or process the materials used.
  • the fibrous materials may be cellulosic fibers, thermoplastic starch fibers, flax fibers, hemp fibers, flax fibers, sheep wool fibers, cotton fibers or multicomponent fibers, in particular bicomponent fibers having a length smaller than the filter to be produced and having a thickness, for example. in the range of 25 and 30 microns.
  • cellulose fibers of the stora fluff EF type untreated from Stora Enso Pulp AB can be used which have an average cross section of 30 ⁇ m and a length of between 0.4 and 7.2 mm.
  • synthetic fibers such as, for example, bicomponent fibers, fibers of the type Trevira 255 3.0 dtex HM with a length of 6 mm from Trevira GmbH can be used. These have a diameter of 25 microns.
  • synthetic fibers cellulose acetate fibers, polypropylene fibers, polyethylene fibers and polyethylene terephthalate fibers can be used.
  • the additives can be found in the flavor or smoke-influencing materials, such as activated charcoal granules or flavoring agents, and also binders by means of which the fibers can be glued together.
  • FIG. 13 shows a schematic three-dimensional view of a device according to the invention for producing a nonwoven for the production of filter rods of the tobacco-processing industry.
  • the separating drums 81 for example in the form of screening drums which have been described in more detail above.
  • singling rollers 26 may be arranged, as also described above. Reference is made in this regard in particular to FIGS. 5 to 7 as well as FIG. 1.
  • the singling drum 81 may be designed to rotate about a rotation axis 91. However, the singling drum 81 can also be fixed, in which case a longitudinal axis is provided which coincides with the rotation axis 91 shown in FIG.
  • a separating roller may also be arranged in the singling drum 81, which rotates about a rotation axis 91 or an axis of rotation displaced parallel to the rotation axis 91.
  • the singulating drums 81 and screening drums are designed to effectively separate fibers of one variety.
  • the screens of the screening drum can be adapted to the length and the diameter of the fibers to be separated, for example with regard to their length and width.
  • the separating devices 80 Downstream of the fiber conveying direction, the separating devices 80 are followed by delivery chutes 82, which supply the singulated fiber material to a joining element 83, which has a chamber 87 in the lower region, into which the delivery chutes 82 open.
  • a suction belt conveyor 84 is arranged following the chamber 87 or in the lower region of the union element 83.
  • the filter materials are mixed accordingly. These are conveyed both via gravity but essentially via transport air, so that due to the turbulence of the transport air in the chamber 87 a good mixing is achieved.
  • the transfer area 85 are the mixed and isolated fibers, which may optionally be mixed by granules which are supplied, for example, by a further shaft, not shown, of the chamber 87, into the effective range of the suction belt 86 of the suction belt conveyor 84.
  • a fiber fleece 88 is woken up.
  • the nonwoven fabric 88 is shown in FIG. 14.
  • the suction belt 86 moves in the conveying direction 92, so that the aufschauernde nonwoven fabric increases in thickness in the conveying direction.
  • FIG. 14 shows a detail of FIG. 13, in which the area of the mixing chamber 87 is shown in somewhat greater detail, in a schematic section of such a device.
  • the delivery wells 82 are initially aligned in parallel at the top, which is a change compared to the embodiment of FIG.
  • the fibers 90 and granules 89 are also shown.
  • three different types of fiber and two different types of granules are fed to the chamber 87 and then thrown to form a fiber web 88 on the conveyor belt 86.
  • the conveying air is sucked off below the suction belt 86 by a negative pressure prevailing there.

Landscapes

  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Nonwoven Fabrics (AREA)
EP06009384A 2003-04-03 2003-08-08 Verfahren und Vorrichtung zur Herstellung eines Vlieses für die Herstellung von Filterstäben Withdrawn EP1683432A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06009384A EP1683432A1 (de) 2003-04-03 2003-08-08 Verfahren und Vorrichtung zur Herstellung eines Vlieses für die Herstellung von Filterstäben

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP03007675A EP1464239B1 (de) 2003-04-03 2003-04-03 Verfahren und Einrichtung zur Herstellung eines Filterstranges
EP06009384A EP1683432A1 (de) 2003-04-03 2003-08-08 Verfahren und Vorrichtung zur Herstellung eines Vlieses für die Herstellung von Filterstäben
EP03018113A EP1464240B1 (de) 2003-04-03 2003-08-08 Verfahren und Vorrichtung zur Herstellung eines Vlieses für die Herstellung von Filterstäben

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EP1683432A1 true EP1683432A1 (de) 2006-07-26

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EP03018113A Expired - Lifetime EP1464240B1 (de) 2003-04-03 2003-08-08 Verfahren und Vorrichtung zur Herstellung eines Vlieses für die Herstellung von Filterstäben

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US (1) US20040237269A1 (zh)
EP (2) EP1683432A1 (zh)
JP (1) JP4512397B2 (zh)
CN (1) CN1535628B (zh)
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DE102006018102A1 (de) * 2006-04-18 2007-10-25 Hauni Maschinenbau Ag Faserfilterherstellung
DE102006028382A1 (de) * 2006-06-19 2007-12-27 Hauni Maschinenbau Ag Filtermaterialrückführung
DE102010000680A1 (de) 2010-01-05 2011-07-07 Hauni Maschinenbau AG, 21033 Herstellung von Filtersträngen und Filterstrangmaschine
DE102010000677A1 (de) * 2010-01-05 2011-07-07 Hauni Maschinenbau AG, 21033 Vorrichtung zur gleichzeitigen Herstellung von wenigstens zwei Faservliesen für die Herstellung von Filterstäben der Tabak verarbeitenden Industrie
CN102860586B (zh) * 2011-07-04 2014-03-26 湖北中烟工业有限责任公司 一种具本草烟香的无纺布滤嘴材料及其制备方法
US10076135B2 (en) 2014-05-23 2018-09-18 Greenbutts Llc Biodegradable cigarette filter tow and method of manufacture
WO2016012447A1 (en) * 2014-07-22 2016-01-28 Jt International S.A. Method and apparatus for forming a filter rod
WO2016083988A1 (en) * 2014-11-26 2016-06-02 G.D S.P.A. Method and apparatus for making a continuous rod of fibrous material
DE102020125404A1 (de) * 2020-09-29 2022-03-31 Voith Patent Gmbh Luftlegeeinrichtung

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JP4512397B2 (ja) 2010-07-28
PL366815A1 (en) 2004-10-04
EP1464240B1 (de) 2006-10-04
US20040237269A1 (en) 2004-12-02
EP1464240A1 (de) 2004-10-06
CN1535628B (zh) 2012-05-23
PL210029B1 (pl) 2011-11-30
JP2004337158A (ja) 2004-12-02
CN1535628A (zh) 2004-10-13

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