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EP2398945B1 - Method for producing multiple fiber strips in parallel and apparatus for executing said method - Google Patents

Method for producing multiple fiber strips in parallel and apparatus for executing said method Download PDF

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Publication number
EP2398945B1
EP2398945B1 EP10705553.5A EP10705553A EP2398945B1 EP 2398945 B1 EP2398945 B1 EP 2398945B1 EP 10705553 A EP10705553 A EP 10705553A EP 2398945 B1 EP2398945 B1 EP 2398945B1
Authority
EP
European Patent Office
Prior art keywords
separating
parallel
fibre strips
strips
guided
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.)
Active
Application number
EP10705553.5A
Other languages
German (de)
French (fr)
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EP2398945A1 (en
Inventor
Thomas Krumrey
Dieter Ruf
Martin Moser
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.)
Cerdia Produktions GmbH
Original Assignee
Solvay Acetow GmbH
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Publication date
Application filed by Solvay Acetow GmbH filed Critical Solvay Acetow GmbH
Publication of EP2398945A1 publication Critical patent/EP2398945A1/en
Application granted granted Critical
Publication of EP2398945B1 publication Critical patent/EP2398945B1/en
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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/12—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes
    • 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
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
    • D02G3/06—Threads formed from strip material other than paper
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/18—Separating or spreading

Definitions

  • the invention relates to a method for the parallel production of a plurality of fiber strips, in particular a plurality of filter tow strips, according to the preamble of claim 1 and an apparatus for carrying out this method according to the preamble of claim 11.
  • the publication DE 25 04 534 A1 describes a process for the production of convertor tape in which multiple belts are driven simultaneously through a crimping machine.
  • the publication DE 10 2007 022112 A1 relates to a device for crimping a synthetic thread.
  • the thread is upset by means of a texturizing to a yarn plug, fed to a plug storage for thermal treatment and dissolved a take-off means to a crimped yarn.
  • the plug storage is in this case formed by a rotatably mounted treatment drum with a gas-permeable guide casing, guided at the periphery of the yarn plug with a plurality of wraps and flows through with a gaseous fluid.
  • the guide sheath of the treatment drum for guiding the yarn plug at least two radially encircling guideways and formed between the guideways separation path, wherein the guide sheath is gas-impermeable in the region of the separation path and wherein the separating web is crossed by the yarn plug.
  • a cellulose acetate filter tow typically consists of more than 1,000 filaments formed with fine spray nozzles of acetate flakes substantially dissolved in acetone, initially present as uncrimped fiber strips each having longitudinally oriented filaments. Their required for use in cigarette filters mechanical stability and the necessary draw resistance receive these fiber strips only by a Crimping treatment, in which the linearly arranged filaments are deformed in a zigzag shape in a so-called compression channel to crimped fiber strips with substantially constant and symmetrical Kösel suspectizing over the entire fiber strip cross-section; Typical parameters for describing the crimp characteristic are the crimp index (number of crimps per length of filter tow) and the degree of crosslinking (number of entanglements between crimped adjacent filaments per length of filter tow).
  • the resulting crimped filter tows or filter strands have a constant total titer (weight per meter of uncracked filter tow length) and show uniform cross-linking or entanglement under the filaments over the entire strip width. To provide for further use, they are usually stored in a storage container, pressed and packaged as a bale.
  • Such a multi-width fiber strip is characterized by its further processing in conventional processing equipment, especially in double filter extruders with Einzelaufhneungsteil from where it leads to a significant reduction in setup costs by each operation provided several filter tow strips simultaneously and in a defined manner with a filter bales and the separation problems and Reliable can be done via the separation of the predetermined tear lines.
  • the invention has for its object to provide a method for simultaneous, parallel production of a plurality of crimped fiber strips, in particular a plurality of filter tows, which is suitable to overcome the above-mentioned disadvantages of the prior art, ie in particular productivity losses and the phenomenon of the split edge with his Sequelae even at a small total titre to avoid the fiber strip or, in other words, to allow the production of crimped fiber strips with an edge quality known from conventionally produced standard tows, while maintaining the EP 0 629 722 A1 described productivity advantages especially for small total titers, as required by the market for slim and superslim filters.
  • a device for carrying out this method should be proposed.
  • This object of the invention is achieved by a method for simultaneous, parallel production of crimped fiber strips, in particular filter tows, in a crimping machine with an inlet region, a crushing zone formed between two transport rollers and a compression channel with the successive process steps according to claim 1: a) simultaneous, parallel Feeding a plurality of fiber strips across the lead-in area, wherein the fiber strips are guided separately in the lead-in area using a first separator; b) simultaneously transporting and compacting the fiber strips simultaneously in the pinch zone by means of the two transport rollers; and c) simultaneously crimping the fiber strips in parallel the compression channel, wherein the method is characterized in that the fiber strips in step b) using a second separator and in step c) using a third Separating device are each performed separately and wherein the first, second and third separating means are formed in a manner that the parallel separate guidance of the fiber strips from the inlet region through the pinch zone into the compression channel inside occurs without interruption.
  • the solution component of the object of the invention is also an apparatus for simultaneous, parallel production of crimped fiber strips, in particular filter tows, according to claim 11, comprising an inlet region with a first separating device for simultaneous, parallel and separate feeding of a plurality of fiber strips, a transport roller pair for simultaneous, parallel Transporting and compacting the fiber strips in a pinch zone and a compression channel for simultaneous, parallel curling of the fiber strips, the device being characterized in that provided in the pinch zone, a second separating means for separate transporting and compressing and in the stuffer box, a third separating means for separately crimping the fiber strips are, wherein the first, second and third separating means are formed in such a way that the fiber strips parallel from the inlet region through the squeeze zone into the compression channel into interruption freely separated feasible.
  • the invention enables the simultaneous formation of a plurality of separate crimped fiber strips having a substantially constant and symmetrical crimping characteristic over the respective entire fiber strip cross-section.
  • the linear filaments produced by a conventional spinning machine are first of all allocated to a larger number of slivers, and subsequently fed to the crimping machine by means of a first separating device for the simultaneous and parallel production of a corresponding number of self-contained crimped fiber strips become.
  • the multi-width crimped fiber strips depending on the execution of the first separator in the inlet region of the crimping respectively along the predetermined tear between two adjacent fiber strips form a more or less wide range with a relatively undefined Kösel characterizing, which in the isolated fiber strips as a correspondingly unstable edge with significantly coarser crimping - d. H. with a smaller number of curling arcs per elongated filter tow length
  • the crimped fiber strips produced in parallel according to the invention are comparatively reinforced in the edge region and are characterized by a substantially constant and symmetrical curling characteristic over the respective entire fiber strip cross section, so that the phenomenon of the split edge does not occur with the associated sequelae.
  • the invention not only allows a productivity comparable to the production method for multi-width fiber strips in the production of crimped fiber strips with a small total titer, but is also distinguished by a comparably high product quality comparable to conventionally produced standard filter tows, namely a lateral edge embossing with symmetrical crimping today it conforms to standard commercial filter towers.
  • This high product quality is particularly advantageous in a compared to isolated multiple-width fiber strips significantly reduced edge dust formation in the further processing of the fiber strips produced according to the invention to express.
  • the invention provides a second separator with at least one second release agent in direct connection to this first separator, which extends over the entire immediate collection -, contact and exit region of the motor-driven transport roller pair used in a known manner as a common fiber strip transport means extends and which provides a second release agent between each two of the fiber strips in order to perform this under complete separation, so uninterrupted, in parallel.
  • the fiber strip transport in the direction of a compression channel, which is provided for parallel crimping all supplied fiber strips, is effected by means of friction between the respective fiber strip upper side and the upper transport roller and the fiber strip underside and the lower transport roller.
  • At least two crimped fiber strips are preferably produced simultaneously along a linear transport path in a crimping machine.
  • Particularly preferred is the simultaneous, parallel production of three, four or five crimped fiber strips in a crimping machine.
  • the respectively provided first and second separating device thus differ essentially only in the number of the respectively required first and second separating means. Their number depends on the number of each simultaneously, parallel and directly next to each other by the crimping separately leading to fiber strips, between each of which such a mechanical component is provided.
  • n-1 separating means are provided in a parallel arrangement per separator, where n stands for the number of leading in the crimping parallel to fiber strips.
  • the area between the transport rollers that is, the immediate intake, contact and exit area of the transport roller pair, is referred to herein as a pinch zone.
  • the clear width between the two parallel to each other rotating transport rollers is adjustable and is preferably adjusted so that the transport of each fiber strip under the simultaneous compression by means of the transport roller pair takes place.
  • the second separating device has the purpose of reliably preventing each of the fiber strips fed in parallel during the passage through the squeeze zone between the transport roller pair acting as a common transporting and compressing means from the respective adjacent fiber strip or strips to separate.
  • the second separating means preferably comprises a separating blade extension as a second separating means between each two adjacent guided fiber strips, which is connected as possible gap-free with the corresponding separating blade;
  • the gap-free designation is a maximum distance between two components of less than approximately one half of a filament diameter, which is suitable in this respect for preventing a single filament from being squeezed in. It is advantageous in this case if the separating blade extension completely penetrates the crushing zone and thus a continuous separate guidance of the fiber strips fed in parallel to the crimping machine in the inlet region and in the pinching zone is made possible.
  • the first release agent as a separation blade and the second release agent as Trennhistverinrung for complete separation of two of the parallel guided fiber strips are formed and assigned to each other in such a way that a squeezing a single filament of the parallel fiber strips in the Gap between the separating blade and the separating blade extension is prevented, so that the assignment is so far gap-free.
  • the separating blade extension and the two transport rollers in the area of the crushing zone are associated with each other so that a complete and gap-free penetration of the pinch zone is given by the second release agent, so that an uninterrupted guiding the two parallel fiber strips along the first and second separating means is ensured
  • the first release agent is preferably designed as a separation blade and the second release agent preferably as a separation blade extension, wherein a separation blade and a separation blade extension are arranged in gap-free connection between each two of the fiber strips in a manner that the separation blade extension, the two transport rollers in the crush zone penetrates completely and without gaps.
  • the inventive method with this device namely using a separating blade and a separating blade extension in a gap-free arrangement and with complete and gap-free penetration of the two transport rollers in the crush zone by the second release agent or the separation blade extension, for complete separation of two of the parallel guided fiber strips is performed.
  • the complete penetration of the pinch zone is ensured by the extension blade extension by means of opposing grooves in the lateral surfaces of the transport roller pair, wherein the separation blade extension for complete separation of each two parallel fiber strips penetrates the two transport rollers in the crush zone without contact in grooves.
  • the respective groove depth is dimensioned according to the dimensions of the second release agent and its relative position in the transport plane within the pinch zone, wherein the height of the second release agent between the fiber strips is in any case greater than the inside width in the pinch zone between the two transport rollers.
  • the second release agent and the two transport rollers are preferably associated with each other in such a way that a squeezing of a single filament of the parallel fiber strips is prevented in the respective groove, the assignment so far is gap-free and a complete separation of two parallel guided fiber strips in the crushing zone formed between the two transport rollers is made possible.
  • the groove width depends on the width of the respectively used second release agent in the nip. As materials for a separator, therefore, all commonly used in mechanical engineering materials of sufficient strength in question. With this preferred embodiment of the second separating device, complete separation of the fiber strips passing in parallel through the squeezing zone is reliably effected.
  • dividing plates or separating blade extensions may be used in individual cases be advantageous with semicircular recesses, wherein the recesses are each dimensioned so that they enclose the two transport rollers in the pinch zone as possible without gaps or penetrate, for example, only in grooves shallow depth without contact in the manner of a tongue-and-groove connection.
  • the third separating device is provided immediately after the second separating device and is designed in the connecting region so that an uninterrupted guiding of the adjacent fiber strips from the crushing zone into the compression channel of the crimping machine is ensured.
  • the third separating means also comprises at least a third separating means between each two of the fiber strips to be led in order to allow their completely separate guidance.
  • the crimping of the transport roller pair supplied in parallel fiber strips in a known manner according to the stuffer box principle, wherein the separate leadership of the individual fiber strips in the transport plane during the crimping process by a compression channel bottom, a movable compression channel cover and either one of the two compression channel side walls and a third release agent or two of the third release agent is ensured in the transport direction.
  • the third separating device is formed in the compression channel so that it divides at least the inlet region thereof into parallel regions for separately guiding the fiber strips on entry into the compression channel.
  • the third separating device may also be advantageous to design the third separating device in such a way that it permits completely separate guidance of the individual fiber strips during the parallel crimping treatment, that is to say from entry to exit of the compression channel.
  • the third separating device it is preferable to provide the third separating device with at least one third separating means in the form of a separating web between in each case two adjacent fiber strips, wherein the or each separating web extends vertically between the compression channel bottom and the movable compression channel cover and subdivides the entire compression channel in the longitudinal direction.
  • sufficient separation of the entry region of the compression channel is likewise preferably effected by means of separating webs.
  • the first release agent in the inlet region of the crimping, the second release agent in the area between the transport rollers and the third release agent in the compression channel between two parallel fiber strips each as a separate component - and insofar multipart - provided in as gap-free arrangement.
  • first, second and third separating means in the form may furthermore be preferred in that the first and second separating means are formed in one piece and in as gap-free as possible a separate third separating means. Furthermore, it may equally be preferred that the first separating means be provided separately and the second and third separating means are provided in one piece and in as gap-free as possible arrangement with respect to the first separating means.
  • first release agent in the inlet region of the crimping machine, the second release agent in the area between the transport rollers and / or the third release agent in the compression channel in each case in several parts and insofar in the form of release agent segments, which in turn are assigned to each other as gap-free as possible.
  • the folding movement of the upper compression channel cover required for the crimping operation is ensured by a corresponding structural design of the compression channel and the third separating device comprised thereof.
  • the lateral guide means which are always provided for the outer or lateral boundary of the fiber strip transport path or the fiber strip transport plane within the crimping machine, are designed in a known manner, for example as guide plates in the inlet region, as discs placed on the transport roller ends with an enlarged diameter in the pinch region or as trough-like relative to the respective roller diameter trained chutes for each individual crimped fiber strip in the outlet region of the crimping machine.
  • These lateral boundaries of the fiber strip transport path are the first in the inlet region, the second in the region of the pinch zone and the third lateral guide elements in the region of the compression channel designated.
  • An individual control of the crimped fiber strip width is made possible by a corresponding adjustment of the distances between the individual release agents, optionally with the incorporation of further or removal of existing release agents within the fiber strip transport path in a known manner.
  • the crimped fiber strips produced in parallel it is preferable first to place them separately in a common storage container after leaving the crimping machine and then to pack them in the desired quantity into common bales. It may also be advantageous to deposit these fiber strips separately, to press them and to package them in separate bales.
  • the device according to the invention is for parallel production of two crimped fiber or Filtertowstsammlung from two separate, equally wide and uncrimped fiber or Filtertowstsammlung (1, 2) formed with substantially aligned in the transport direction cellulose acetate filaments.
  • the device according to the invention is also referred to as a crimping machine (KM).
  • the illustrated crimping machine (KM) comprises an inlet area (3) for simultaneous, parallel feeding of two uncrimped fiber strips (1, 2). This is in a known manner by two in the transport direction (see arrow) of the two fiber strips, (1, 2) laterally arranged first guide elements (32) laterally bounded in the form of guide plates. Between the lateral boundaries, a first separating device (31) is formed with a first separating means (311) in the form of a separating blade, which allows an uninterrupted guiding of the likewise uncrimped fiber strips (1, 2) in the inlet region (3) in a substantially horizontal transport plane ,
  • a motor-driven transport roller pair (4, 5) is arranged, which cooperates in a known manner with the compression channel (7) from the supplied uncrimped fiber strips (1, 2) according to the stuffer box principle to produce the desired crimped fiber strips.
  • a second separating device (61) adjoins the first separating device (31) in the region between the two transporting rollers (4, 5) without a gap; the second transport roller (5) is shown by dashed lines for clarity.
  • This second separating device (61) comprises a second separating means (611) in the form of an extension of the separating blade provided as the first separating means (311).
  • each of the two transport rollers (4, 5) has a groove with a depth of about half the width of the separation blade extension, whereby a complete, gap-free and non-contact penetration of the separating blade extension and transport roller pair (4, 5) is ensured and thus far a completely separate transporting and compressing the two uncrimped fiber strips (1, 2) by the transport roller pair (4, 5) is possible.
  • a second lateral guide element (62) is in each case arranged in a gap-free arrangement provided with the respectively corresponding first lateral guide element (32) in the inlet region (3).
  • the third separating device (71) in the compression channel (7) adjoins the separating blade extension provided as the second separating means (611).
  • This has a separating web as a third separating means (711) which extends over the entire length and height of the stuffer box (7) and with the Stauchkanal founded, each an edging channel side wall - as a third lateral guide element (72) for lateral delimitation of the transport plane - and the movable compression channel cover, two separate, parallel compression channels defined for spatially separated crimping of the two parallel fiber strips.
  • the respective third lateral guide element (72) adjoins the corresponding second lateral guide element (62) without gaps.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Nonwoven Fabrics (AREA)

Description

Die Erfindung betrifft ein Verfahren zur parallelen Herstellung mehrerer Faserstreifen, insbesondere mehrerer Filtertowstreifen, gemäß dem Oberbegriff des Anspruchs 1 sowie eine Vorrichtung zur Durchführung dieses Verfahrens gemäß dem Oberbegriff des Anspruchs 11.The invention relates to a method for the parallel production of a plurality of fiber strips, in particular a plurality of filter tow strips, according to the preamble of claim 1 and an apparatus for carrying out this method according to the preamble of claim 11.

Die Druckschrift DE 25 04 534 A1 beschreibt ein Verfahren zur Herstellung von Convertor-Kabel (Convertor Band), bei welchem mit mehreren Bändern gleichzeitig durch eine Kräuselmaschine gefahren wird.The publication DE 25 04 534 A1 describes a process for the production of convertor tape in which multiple belts are driven simultaneously through a crimping machine.

Die Druckschrift DE 10 2007 022112 A1 betrifft eine Vorrichtung zum Kräuseln eines synthetischen Fadens. Hierzu wird der Faden mittels eines Texturiermittels zu einem Fadenstopfen aufgestaucht, einem Stopfenspeicher zur thermischen Behandlung zugeführt und einem Abzugsmittel zu einem gekräuselten Faden aufgelöst. Der Stopfenspeicher wird hierbei durch eine drehbar gelagerte Behandlungstrommel mit einem gasdurchlässigen Führungsmantel gebildet, an dessen Umfang der Fadenstopfen mit mehreren Umschlingungen geführt und mit einem gasförmigen Fluid durchströmt ist. Um bei mehrfacher Umschlingung des Fadenstopfens keine gegenseitige Beeinträchtigungen der Umschlingungen an der Fadentrommel zu erhalten, weist der Führungsmantel der Behandlungstrommel zur Führung des Fadenstopfens zumindest zwei radial umlaufende Führungsbahnen und eine zwischen den Führungsbahnen ausgebildete Trennbahn auf, wobei der Führungsmantel im Bereich der Trennbahn gasundurchlässig ist und wobei die Trennbahn vom Fadenstopfen gekreuzt wird.The publication DE 10 2007 022112 A1 relates to a device for crimping a synthetic thread. For this purpose, the thread is upset by means of a texturizing to a yarn plug, fed to a plug storage for thermal treatment and dissolved a take-off means to a crimped yarn. The plug storage is in this case formed by a rotatably mounted treatment drum with a gas-permeable guide casing, guided at the periphery of the yarn plug with a plurality of wraps and flows through with a gaseous fluid. In order to avoid mutual interference of the wraps on the thread drum with multiple wrapping of the yarn plug, the guide sheath of the treatment drum for guiding the yarn plug at least two radially encircling guideways and formed between the guideways separation path, wherein the guide sheath is gas-impermeable in the region of the separation path and wherein the separating web is crossed by the yarn plug.

Die Druckschrift EP 0 629 722 A1 beschreibt einen derartigen Filtertowstreifen aus vernetzten Filamenten oder Fasern, wie er etwa aus Celluloseacetat gefertigt bei der Herstellung von Zigarettenfiltern eingesetzt wird.The publication EP 0 629 722 A1 describes such a filter tow of crosslinked filaments or fibers, such as made of cellulose acetate used in the manufacture of cigarette filters.

Ein Filtertow aus Celluloseacetat besteht typischerweise aus mehr als 1.000 Filamenten, die mit feinen Spritzdüsen aus im Wesentlichen in Aceton gelösten Acetatflocken gebildet werden und zunächst als ungekräuselte Faserstreifen mit jeweils in Längsrichtung ausgerichteten Filamenten vorliegen. Ihre für die Verwendung in Zigarettenfiltern erforderliche mechanische Stabilität sowie den notwendigen Zugwiderstand erhalten diese Faserstreifen erst durch eine Kräuselbehandlung, bei der die linear angeordneten Filamente zickzackförmig in einem sogenannten Stauchkanal zu gekräuselten Faserstreifen mit im Wesentlichen konstanter und symmetrischer Kräuselcharakteristik über den gesamten Faserstreifenquerschnitt verformt werden; typische Parameter zur Beschreibung der Kräuselcharakteristik sind der Kräuselindex (Anzahl von Kräuselungen pro Länge Filtertow) und der Vernetzungsgrad (Anzahl der Verhakungen zwischen gekräuselten benachbarten Filamenten pro Länge Filtertow). Die so erhaltenen gekräuselten Filtertowstreifen oder Filterstränge haben einen konstanten Gesamttiter (Gewicht pro Meter ungekräuselte Filtertowlänge) und zeigen über die gesamte Streifen breite eine gleichmäßige Vernetzung bzw. Verhakung unter den Filamenten. Zur Bereitstellung für die weitere Verwendung werden sie üblicherweise in einem Ablagebehälter abgelegt, gepresst und als Ballen verpackt.A cellulose acetate filter tow typically consists of more than 1,000 filaments formed with fine spray nozzles of acetate flakes substantially dissolved in acetone, initially present as uncrimped fiber strips each having longitudinally oriented filaments. Their required for use in cigarette filters mechanical stability and the necessary draw resistance receive these fiber strips only by a Crimping treatment, in which the linearly arranged filaments are deformed in a zigzag shape in a so-called compression channel to crimped fiber strips with substantially constant and symmetrical Kräuselcharakteristik over the entire fiber strip cross-section; Typical parameters for describing the crimp characteristic are the crimp index (number of crimps per length of filter tow) and the degree of crosslinking (number of entanglements between crimped adjacent filaments per length of filter tow). The resulting crimped filter tows or filter strands have a constant total titer (weight per meter of uncracked filter tow length) and show uniform cross-linking or entanglement under the filaments over the entire strip width. To provide for further use, they are usually stored in a storage container, pressed and packaged as a bale.

Ausgehend davon lehrt die EP 0 629 722 A1 eine effizientere Herstellung von einem Filtertowstreifen aus gekräuselten, vernetzten Filamenten der vorgenannten Art, die dadurch ermöglicht wird, dass mehrere Filtertowstreifen parallel in derselben Vorrichtung erzeugt werden, wobei die parallel erzeugten Filtertowstreifen jeweils über in Streifenlängsrichtung verlaufende Sollreißlinien, die gegenüber dem jeweiligen Filterkörper einen geringeren Vernetzungsgrad aufweisen, verbunden sind, so dass zunächst ein sogenannter mehrfachbreiter Faserstreifen entsteht. Ein solcher mehrfachbreiter Faserstreifen zeichnet sich durch seine Weiterverarbeitbarkeit in herkömmlichen Aufbereitungsvorrichtungen, insbesondere in Doppelfilterstrangmaschinen mit Einzelaufbereitungsteil, aus und führt dort zu einer erheblichen Reduzierung der Rüstkosten, indem pro Arbeitsgang jeweils mehrere Filtertowstreifen gleichzeitig und in definierter Weise mit einem Filtertowballen bereitgestellt und die Vereinzelung problemlos und zuverlässig über das Auftrennen der Sollreißlinien erfolgen können.Based on that teaches the EP 0 629 722 A1 a more efficient production of a filter tow strip of crimped, crosslinked filaments of the aforementioned type, which is made possible in that several filter tows are produced in parallel in the same device, wherein the filter tows produced in parallel over each other in the strip longitudinal direction predetermined tear lines, with respect to the respective filter body a lower degree of crosslinking are connected, so that first a so-called multi-wide fiber strip is formed. Such a multi-width fiber strip is characterized by its further processing in conventional processing equipment, especially in double filter extruders with Einzelaufbereitungsteil from where it leads to a significant reduction in setup costs by each operation provided several filter tow strips simultaneously and in a defined manner with a filter bales and the separation problems and Reliable can be done via the separation of the predetermined tear lines.

Zwar weisen die nach der EP 0 629 722 A1 aus einem mehrfachbreiten Filtertowstreifen durch Auftrennen entlang den Sollreißlinien erhältlichen einzelnen Filtertowstreifen auch einen im Wesentlichen gleichen Gesamttiter und Kräuselindex auf, jedoch hat sich gezeigt, dass nach der Auftrennung entlang den Sollreißlinien vermehrt Probleme mit abgespaltenen Kanten, als Folge der geringeren Anzahl von Kräuselbögen pro Filtertowlänge im Trennbereich und mithin des geringeren Vernetzungsgrades der Filamente, auftreten.Although, according to the EP 0 629 722 A1 from a multiple-width filter tow by separating along the predetermined tear lines available individual filter tow also a substantially same total titer and crimp index on, but it has been shown that after separation along the predetermined tear lines increasingly problems with split edges, as a result of the smaller number of curling arcs per Filtertowlänge in Separation and thus the lower degree of crosslinking of the filaments occur.

Abgetrennte oder auch nur instabile Kanten können sich aber negativ auf die Qualität des Endproduktes, etwa eines Zigarettenflters, auswirken, und zwar um so mehr, je niedriger der Gesamttiter des verarbeiteten gekräuselten Filtertowstreifens ist. So ist mit dem Phänomen der abgespaltenen Kante eine vermehrte Erzeugung von sogenanntem Randstaub verbunden, der vor allem bei modernen schnelllaufenden Filterstabmaschinen zu schwankenden Qualitäten bei den erzeugten Filterstäben führt.However, severed or even unstable edges can negatively impact the quality of the final product, such as a cigarette filler, and more so the lower the total titer of the processed crinkled filter tow. Thus, with the phenomenon of split-off edge increased production of so-called edge dust is connected, which leads, especially in modern high-speed filter rod machines to varying qualities in the filter rods produced.

Der Erfindung liegt die Aufgabe zugrunde, eine Verfahren zur gleichzeitigen, parallelen Herstellung mehrerer gekräuselter Faserstreifen, insbesondere mehrerer Filtertowstreifen, anzugeben, das geeignet ist, die vorstehend genannten Nachteile des Standes der Technik zu überwinden, also insbesondere Produktivitätsverluste und das Phänomen der abgespaltenen Kante mit seinen Folgeerscheinungen auch bei kleinem Gesamttiter der Faserstreifen zu vermeiden oder, anders ausgedrückt, die Herstellung von gekräuselten Faserstreifen mit einer von konventionell erzeugten Standardtows bekannten Kantenqualität zu ermöglichen, und zwar unter Beibehaltung der in EP 0 629 722 A1 beschriebenen Produktivitätsvorteile gerade bei kleinen Gesamttitern, wie sie etwa der Markt für Slim- und Superslim-Filter fordert. Außerdem soll eine Vorrichtung zur Durchführung dieses Verfahrens vorgeschlagen werden.The invention has for its object to provide a method for simultaneous, parallel production of a plurality of crimped fiber strips, in particular a plurality of filter tows, which is suitable to overcome the above-mentioned disadvantages of the prior art, ie in particular productivity losses and the phenomenon of the split edge with his Sequelae even at a small total titre to avoid the fiber strip or, in other words, to allow the production of crimped fiber strips with an edge quality known from conventionally produced standard tows, while maintaining the EP 0 629 722 A1 described productivity advantages especially for small total titers, as required by the market for slim and superslim filters. In addition, a device for carrying out this method should be proposed.

Diese Aufgabe der Erfindung wird durch ein Verfahren zur gleichzeitigen, parallelen Herstellung von gekräuselten Faserstreifen, insbesondere Filtertowstreifen, in einer Kräuselmaschine mit einem Einlaufbereich, einer zwischen zwei Transportwalzen gebildeten Quetschzone und einem Stauchkanal mit den aufeinanderfolgenden Verfahrensschritten gemäß Anspruch 1 gelöst: a) gleichzeitiges, paralleles Zuführen einer Mehrzahl von Faserstreifen über den Einlaufbereich, wobei die Faserstreifen im Einlaufbereich unter Verwendung einer ersten Trenneinrichtung getrennt geführt werden, b) gleichzeitiges, paralleles Transportieren und Verdichten der Faserstreifen in der Quetschzone mittels der beiden Transportwalzen und c) gleichzeitiges, paralleles Kräuseln der Faserstreifen in dem Stauchkanal, wobei das Verfahren dadurch gekennzeichnet ist, dass die Faserstreifen bei Verfahrensschritt b) unter Verwendung einer zweiten Trenneinrichtung und bei Verfahrensschritt c) unter Verwendung einer dritten Trenneinrichtung jeweils getrennt geführt werden und wobei die erste, zweite und dritte Trenneinrichtung in einer Weise ausgebildet sind, dass die parallele getrennte Führung der Faserstreifen vom Einlaufbereich durch die Quetschzone in den Stauchkanal hinein unterbrechungsfrei erfolgt.This object of the invention is achieved by a method for simultaneous, parallel production of crimped fiber strips, in particular filter tows, in a crimping machine with an inlet region, a crushing zone formed between two transport rollers and a compression channel with the successive process steps according to claim 1: a) simultaneous, parallel Feeding a plurality of fiber strips across the lead-in area, wherein the fiber strips are guided separately in the lead-in area using a first separator; b) simultaneously transporting and compacting the fiber strips simultaneously in the pinch zone by means of the two transport rollers; and c) simultaneously crimping the fiber strips in parallel the compression channel, wherein the method is characterized in that the fiber strips in step b) using a second separator and in step c) using a third Separating device are each performed separately and wherein the first, second and third separating means are formed in a manner that the parallel separate guidance of the fiber strips from the inlet region through the pinch zone into the compression channel inside occurs without interruption.

Lösungsbestandteil der Aufgabe der Erfindung ist auch eine Vorrichtung zur gleichzeitigen, parallelen Herstellung von gekräuselten Faserstreifen, insbesondere Filtertowstreifen, gemäß Anspruch 11, aufweisend einen Einlaufbereich mit einer ersten Trenneinrichtung zum gleichzeitigen, parallelen und getrennten Zuführen einer Mehrzahl von Faserstreifen, ein Transportwalzenpaar zum gleichzeitigen, parallelen Transportieren und Verdichten der Faserstreifen in einer Quetschzone und einen Stauchkanal zum gleichzeitigen, parallelen Kräuseln der Faserstreifen, wobei die Vorrichtung dadurch gekennzeichnet ist, dass in der Quetschzone eine zweite Trenneinrichtung zum getrennten Transportieren und Verdichten und im Stauchkanal eine dritte Trenneinrichtung zum getrennten Kräuseln der Faserstreifen vorgesehen sind, wobei die erste, zweite und dritte Trenneinrichtung in einer Weise ausgebildet sind, dass die Faserstreifen parallel vom Einlaufbereich durch die Quetschzone in den Stauchkanal hinein unterbrechungsfrei getrennt führbar sind.The solution component of the object of the invention is also an apparatus for simultaneous, parallel production of crimped fiber strips, in particular filter tows, according to claim 11, comprising an inlet region with a first separating device for simultaneous, parallel and separate feeding of a plurality of fiber strips, a transport roller pair for simultaneous, parallel Transporting and compacting the fiber strips in a pinch zone and a compression channel for simultaneous, parallel curling of the fiber strips, the device being characterized in that provided in the pinch zone, a second separating means for separate transporting and compressing and in the stuffer box, a third separating means for separately crimping the fiber strips are, wherein the first, second and third separating means are formed in such a way that the fiber strips parallel from the inlet region through the squeeze zone into the compression channel into interruption freely separated feasible.

Die Erfindung ermöglicht das gleichzeitige Ausbilden einer Mehrzahl von voneinander getrennten gekräuselten Faserstreifen mit im Wesentlichen konstanter und symmetrischer Kräuselcharakteristik über den jeweils gesamten Faserstreifenquerschnitt. Durch das erfindungsgemäße Verfahren und die zu seiner Durchführung angegebene Vorrichtung wird weiterhin bewirkt, dass gekräuselte Faserstreifen, insbesondere Filtertowstreifen, auch mit kleinem Gesamttiter genauso kostengünstig herstellbar sind wie die mehrfachbreiten Faserstreifen nach dem angegebenen Stand der Technik. Wie bei der Herstellung dieser mehrfachbreiten Faserstreifen werden dafür zunächst die von einer konventionellen Spinnmaschine erzeugten linearen Filamente auf einfache Weise einer größeren Anzahl von Faserbändern zugeordnet, um anschließend mittels einer ersten Trenneinrichtung zur gleichzeitigen und parallelen Erzeugung einer entsprechenden Zahl von eigenständigen gekräuselten Faserstreifen der Kräuselmaschine zugeführt zu werden.The invention enables the simultaneous formation of a plurality of separate crimped fiber strips having a substantially constant and symmetrical crimping characteristic over the respective entire fiber strip cross-section. By means of the method according to the invention and the device specified for carrying it out, crimped fiber strips, in particular filter tow strips, can be produced just as inexpensively, even with a small overall titer, as the multiple-width fiber strips according to the cited prior art. As in the production of these multi-width fiber strips, the linear filaments produced by a conventional spinning machine are first of all allocated to a larger number of slivers, and subsequently fed to the crimping machine by means of a first separating device for the simultaneous and parallel production of a corresponding number of self-contained crimped fiber strips become.

Während aber die mehrfachbreiten gekräuselten Faserstreifen in Abhängigkeit von der Ausführung der ersten Trenneinrichtung im Einlaufbereich der Kräuselmaschine jeweils entlang der Sollreißlinie zwischen zwei benachbarten Faserstreifen einen mehr oder weniger breiten Bereich mit einer relativ undefinierten Kräuselcharakteristik bilden, der sich bei den vereinzelten Faserstreifen als entsprechend instabiler Rand mit deutlich gröberer Kräuselung - d. h. mit einer geringeren Zahl von Kräuselbögen pro gestreckter Filtertowlänge - zeigt, sind die nach der Erfindung parallel erzeugten gekräuselten Faserstreifen im Randbereich vergleichsweise verstärkt und zeichnen sich durch eine im Wesentlichen konstante und symmetrische Kräuselcharakteristik über den jeweils gesamten Faserstreifenquerschnitt aus, so dass das Phänomen der abgespaltenen Kante mit den damit verbundenen Folgeerscheinungen nicht auftritt.But while the multi-width crimped fiber strips depending on the execution of the first separator in the inlet region of the crimping respectively along the predetermined tear between two adjacent fiber strips form a more or less wide range with a relatively undefined Kräuselcharakteristik, which in the isolated fiber strips as a correspondingly unstable edge with significantly coarser crimping - d. H. with a smaller number of curling arcs per elongated filter tow length, the crimped fiber strips produced in parallel according to the invention are comparatively reinforced in the edge region and are characterized by a substantially constant and symmetrical curling characteristic over the respective entire fiber strip cross section, so that the phenomenon of the split edge does not occur with the associated sequelae.

Somit ermöglicht die Erfindung nicht nur eine dem Herstellungsverfahren für mehrfachbreite Faserstreifen vergleichbare Produktivität bzw. Wirtschaftlichkeit bei der Erzeugung von gekräuselten Faserstreifen mit kleinem Gesamttiter, sondern zeichnet sich auch durch eine mit konventionell hergestelltem Standardfiltertow vergleichbare hohe Produktqualität aus, nämlich einer lateralen Kantenausprägung mit symmetrischer Kräuselung wie sie heute marktüblichen Standardfiltertows entspricht. Diese hohe Produktqualität kommt besonders vorteilhaft in einer gegenüber vereinzelten mehrfachbreiten Faserstreifen wesentlich verringerten Randstaubbildung bei der Weiterverarbeitung der nach der Erfindung hergestellten Faserstreifen zum Ausdruck.Thus, the invention not only allows a productivity comparable to the production method for multi-width fiber strips in the production of crimped fiber strips with a small total titer, but is also distinguished by a comparably high product quality comparable to conventionally produced standard filter tows, namely a lateral edge embossing with symmetrical crimping today it conforms to standard commercial filter towers. This high product quality is particularly advantageous in a compared to isolated multiple-width fiber strips significantly reduced edge dust formation in the further processing of the fiber strips produced according to the invention to express.

Die gewünschte hohe Produktqualität der erzeugten Faserstreifen und die gleichzeitige Produktivitätssteigerung bei deren Herstellung mit einer vorhandenen Spinn- und Kräuselmaschine sind insbesondere nicht zu erzielen, wenn eine Trennung der Faserstreifen lediglich vom Einlaufbereich bis zur Quetschzone und im Auslaufbereich, also im Anschluss an den Stauchkanal, oder zusätzlich im Stauchkanal erfolgt. Wie umfangreiche entsprechende Versuche zeigten, sind auf diese Weise jeweils nur gekräuselte Faserstreifen mit unzureichender Kantenqualität erhältlich. Überraschenderweise ergeben sich diese Vorteile aber bei einer vollständig getrennten Führung der benachbarten Faserstreifen über die Quetschzone hinaus in den Stauchkanal hinein wie sie von den Gegenständen der Erfindung umfasst ist. Ein weiterer Produktivitätsvorteil ist mit der Erfindung schließlich insoweit zu erzielen, als danach höhere Spinngeschwindigkeiten gegenüber dem in der EP 0 629 722 A1 beschriebenen Verfahren ermöglicht werden.The desired high product quality of the fiber strips produced and the simultaneous increase in productivity in their production with an existing spinning and crimping machine are particularly not be achieved if a separation of the fiber strips only from the inlet region to the pinch zone and in the outlet region, ie following the compression channel, or additionally done in the compression channel. As extensive corresponding tests have shown, only crimped fiber strips with inadequate edge quality are available in this way. Surprisingly, however, these advantages result in a completely separate guidance of the adjacent fiber strips beyond the pinch zone into the compression channel as it is encompassed by the objects of the invention. Another productivity advantage is finally to be achieved with the invention insofar as higher spinning speeds than in the EP 0 629 722 A1 be described method allows.

Vorteilhafte Weiterbildungen des erfindungsgemäßen Verfahrens sind in den abhängigen Ansprüche 2 bis 10 angegeben. Diese Weiterbildungen werden nachfolgend im Einzelnen unter Angabe der jeweiligen Vorteile sowie unter Einbeziehung der korrespondierenden vorteilhaften Ausführungsformen der erfindungsgemäßen Vorrichtung nach den abhängigen Ansprüchen 12 bis 18 näher erläutert:

  • Für die Herstellung der gekräuselten Faserstreifen bzw. Filtertows werden ungekräuselte Faserstränge oder -streifen mit jeweils im Wesentlichen entlang der Streifenlängsrichtung ausgerichteten Filamenten eingesetzt, wobei keinerlei Einschränkungen bezüglich des Filamentmaterials bestehen. Im Hinblick auf eine Weiterverarbeitung zu Zigarettenfiltern, oder allgemeiner, zu Filterstäben für rauchbare Produkte, ist es allerdings bevorzugt, Filamente aus Celluloseacetat, Polyethylenterephthalat, Polyolefinen (wie Polypropylen), Poiyhydroxybuttersäureestern, Polyamiden (z. B. Nylon) und Viskose einzusetzen.
Advantageous developments of the method according to the invention are specified in the dependent claims 2 to 10. These developments are explained in more detail below, specifying the respective advantages and including the corresponding advantageous embodiments of the device according to the invention according to the dependent claims 12 to 18:
  • For the production of the crimped fiber strips or filter tows, uncrimped fiber strands or strips are used, each with filaments oriented substantially along the longitudinal direction of the strip, with no restrictions on the filament material. However, it is preferable to use filaments of cellulose acetate, polyethylene terephthalate, polyolefins (such as polypropylene), polyhydroxybutyric acid esters, polyamides (e.g., nylon), and viscose in view of further processing into cigarette filters, or more generally filter bars for smokable products.

Zusätzlich zu der bereits aus dem angegebenen Stand der Technik bekannten gleichzeitigen, parallelen Zuführung einer Mehrzahl von ungekräuselten Faserstreifen in die Kräuselmaschine, bei der mittels einer Trenneinrichtung mit wenigstens einem ersten Trennmittel in Form eines Trennblechs zwischen jeweils zwei benachbarten Faserstreifen eine getrennte Führung der Faserstreifen innerhalb des Einlaufbereichs der Kräuselmaschine sichergestellt wird, sieht die Erfindung eine zweite Trenneinrichtung mit wenigstens einem zweiten Trennmittel im direkten Anschluss an diese erste Trenneinrichtung vor, die sich über den gesamten unmittelbaren Einzugs-, Kontakt- und Austrittsbereich des in bekannter Weise als gemeinsames Faserstreifentransportmittel eingesetzten motorisch angetriebenen Transportwalzenpaares erstreckt und die ein zweites Trennmittel zwischen jeweils zwei der Faserstreifen vorsieht, um diese unter vollständiger Trennung, also unterbrechungsfrei, parallel zu führen. Der Faserstreifentransport in Richtung eines Stauchkanals, welcher zum parallelen Kräuseln aller zugeführten Faserstreifen vorgesehen ist, erfolgt mittels Reibung zwischen der jeweiligen Faserstreifenoberseite und der oberen Transportwalze und der Faserstreifenunterseite und der unteren Transportwalze.In addition to the already known from the cited prior art simultaneous, parallel feeding a plurality of uncrimped fiber strips in the crimping machine, in which by means of a separating device with at least a first Separating means in the form of a separating plate between each two adjacent fiber strips a separate guidance of the fiber strips within the inlet region of the crimping is ensured, the invention provides a second separator with at least one second release agent in direct connection to this first separator, which extends over the entire immediate collection -, contact and exit region of the motor-driven transport roller pair used in a known manner as a common fiber strip transport means extends and which provides a second release agent between each two of the fiber strips in order to perform this under complete separation, so uninterrupted, in parallel. The fiber strip transport in the direction of a compression channel, which is provided for parallel crimping all supplied fiber strips, is effected by means of friction between the respective fiber strip upper side and the upper transport roller and the fiber strip underside and the lower transport roller.

Nach der Erfindung werden bevorzugt mindestens zwei gekräuselte Faserstreifen gleichzeitig entlang eines linearen Transportpfades in einer Kräuselmaschine hergestellt. Insbesondere bevorzugt ist auch die gleichzeitige, parallele Herstellung von drei, vier oder fünf gekräuselten Faserstreifen in einer Kräuselmaschine. Die dabei jeweils vorgesehene erste und zweite Trenneinrichtung unterscheiden sich somit im Wesentlichen einzig in der Anzahl der jeweils erforderlichen ersten und zweiten Trennmittel. Deren Anzahl richtet sich nach der Anzahl der jeweils gleichzeitig, parallel und direkt nebeneinander durch die Kräuselmaschine getrennt zu führenden Faserstreifen, zwischen denen jeweils ein solches mechanisches Bauteil vorzusehen ist. Somit sind pro Trenneinrichtung n-1 Trennmittel in paralleler Anordnung vorgesehen, wobei n für die Anzahl der in der Kräuselmaschine parallel zu führenden Faserstreifen steht.According to the invention, at least two crimped fiber strips are preferably produced simultaneously along a linear transport path in a crimping machine. Particularly preferred is the simultaneous, parallel production of three, four or five crimped fiber strips in a crimping machine. The respectively provided first and second separating device thus differ essentially only in the number of the respectively required first and second separating means. Their number depends on the number of each simultaneously, parallel and directly next to each other by the crimping separately leading to fiber strips, between each of which such a mechanical component is provided. Thus, n-1 separating means are provided in a parallel arrangement per separator, where n stands for the number of leading in the crimping parallel to fiber strips.

Der Bereich zwischen den Transportwalzen, also der unmittelbare Einzugs-, Kontakt- und Austrittsbereich des Transportwalzenpaares, wird hierbei als Quetschzone bezeichnet. Die lichte Weite zwischen den beiden parallel gegeneinander drehenden Transportwalzen ist einstellbar und wird vorzugsweise so eingestellt, dass der Transport jedes Faserstreifens unter dessen gleichzeitiger Verdichtung mittels des Transportwalzenpaars erfolgt. Mit anderen Worten: die zweite Trenneinrichtung hat den Zweck, jeden der parallel zugeführten Faserstreifen während des Durchtritts durch die Quetschzone zwischen dem als gemeinsames Transport- und Verdichtungsmittel wirkenden Transportwalzenpaar zuverlässig von dem oder den jeweilig benachbarten Faserstreifen zu trennen.The area between the transport rollers, that is, the immediate intake, contact and exit area of the transport roller pair, is referred to herein as a pinch zone. The clear width between the two parallel to each other rotating transport rollers is adjustable and is preferably adjusted so that the transport of each fiber strip under the simultaneous compression by means of the transport roller pair takes place. In other words, the second separating device has the purpose of reliably preventing each of the fiber strips fed in parallel during the passage through the squeeze zone between the transport roller pair acting as a common transporting and compressing means from the respective adjacent fiber strip or strips to separate.

Bevorzugt ist es dabei, in der ersten Trenneinrichtung im Einlaufbereich der Kräuselmaschine ein Trennschwert als erstes Trennmittel zwischen jeweils zwei benachbart geführten Faserstreifen vorzusehen. Um eine unterbrechungsfreie getrennte Führung dieser Faserstreifen in die Quetschzone zwischen den Transportwalzen sicherzustellen, umfasst die zweite Trenneinrichtung als zweites Trennmittel bevorzugt eine Trennschwertverlängerung zwischen jeweils zwei benachbart geführten Faserstreifen, die mit dem entsprechenden Trennschwert möglichst spaltfrei verbunden ist; als spaltfrei wird im Rahmen dieser Erfindung ein maximaler Abstand zwischen zwei Bauteilen von weniger als etwa einem halben Filamentdurchmesser bezeichnet, der insoweit geeignet ist, ein Hineinquetschen eines einzelnen Filaments zu verhindern. Vorteilhaft ist es hierbei, wenn die Trennschwertverlängerung die Quetschzone vollständig durchdringt und so eine durchgehend getrennte Führung der parallel der Kräuselmaschine zugeführten Faserstreifen im Einlaufbereich und in der Quetschzone ermöglicht wird.It is preferable to provide in the first separation device in the inlet region of the crimping machine, a separating blade as the first separating means between each two adjacent guided fiber strips. In order to ensure uninterrupted separate guidance of these fiber strips in the pinch zone between the transport rollers, the second separating means preferably comprises a separating blade extension as a second separating means between each two adjacent guided fiber strips, which is connected as possible gap-free with the corresponding separating blade; In the context of this invention, the gap-free designation is a maximum distance between two components of less than approximately one half of a filament diameter, which is suitable in this respect for preventing a single filament from being squeezed in. It is advantageous in this case if the separating blade extension completely penetrates the crushing zone and thus a continuous separate guidance of the fiber strips fed in parallel to the crimping machine in the inlet region and in the pinching zone is made possible.

Nach dieser vorteilhaften Ausführungsform der Erfindung sind zum einen das erste Trennmittel als Trennschwert und das zweite Trennmittel als Trennschwertverlängerung zur vollständigen Trennung von jeweils zwei der parallel geführten Faserstreifen ausgebildet und in einer Weise einander zugeordnet, dass ein Hineinquetschen eines einzelnen Filaments der parallel geführten Faserstreifen in den Spalt zwischen Trennschwert und Trennschwertverlängerung verhindert wird, die Zuordnung insoweit also spaltfrei ist. Zum anderen sind die Trennschwertverlängerung und die beiden Transportwalzen im Bereich der Quetschzone einander so zugeordnet, dass ein vollständiges und spaltfreies Durchdringen der Quetschzone durch das zweite Trennmittel gegeben ist, so dass eine unterbrechungsfreie Führung der jeweils zwei parallelen Faserstreifen entlang des ersten und zweiten Trennmittels sichergestellt ist. Mit anderen Worten, das erste Trennmittel ist bevorzugt als Trennschwert und das zweite Trennmittel bevorzugt als Trennschwertverlängerung ausgebildet, wobei ein Trennschwert und eine Trennschwertverlängerung in spaltfreier Verbindung zwischen jeweils zwei der Faserstreifen in einer Weise angeordnet sind, dass die Trennschwertverlängerung die beiden Transportwalzen im Bereich der Quetschzone vollständig und spaltfrei durchdringt. Entsprechend ist es von Vorteil, dass das erfindungsgemäße Verfahren mit dieser Vorrichtung, nämlich unter Verwendung eines Trennschwerts und einer Trennschwertverlängerung in spaltfreier Anordnung und unter vollständiger und spaltfreier Durchdringung der beiden Transportwalzen im Bereich der Quetschzone durch das zweite Trennmittel bzw. die Trennschwertverlängerung, zur vollständigen Trennung von jeweils zwei der parallel geführten Faserstreifen durchgeführt wird.According to this advantageous embodiment of the invention, on the one hand, the first release agent as a separation blade and the second release agent as Trennschwertverlängerung for complete separation of two of the parallel guided fiber strips are formed and assigned to each other in such a way that a squeezing a single filament of the parallel fiber strips in the Gap between the separating blade and the separating blade extension is prevented, so that the assignment is so far gap-free. On the other hand, the separating blade extension and the two transport rollers in the area of the crushing zone are associated with each other so that a complete and gap-free penetration of the pinch zone is given by the second release agent, so that an uninterrupted guiding the two parallel fiber strips along the first and second separating means is ensured , In other words, the first release agent is preferably designed as a separation blade and the second release agent preferably as a separation blade extension, wherein a separation blade and a separation blade extension are arranged in gap-free connection between each two of the fiber strips in a manner that the separation blade extension, the two transport rollers in the crush zone penetrates completely and without gaps. Accordingly, it is advantageous that the inventive method with this device, namely using a separating blade and a separating blade extension in a gap-free arrangement and with complete and gap-free penetration of the two transport rollers in the crush zone by the second release agent or the separation blade extension, for complete separation of two of the parallel guided fiber strips is performed.

In vorteilhafter Weise wird das vollständige Durchdringen der Quetschzone durch die Trennschwertverlängerung mittels sich gegenüberliegenden Nuten in den Mantelflächen des Transportwalzenpaares sichergestellt, wobei die Trennschwertverlängerung zur vollständigen Trennung der jeweils zwei parallel geführten Faserstreifen die beiden Transportwalzen im Bereich der Quetschzone berührungslos in Nuten durchdringt. Die jeweilige Nuttiefe ist entsprechend den Abmessungen des zweiten Trennmittels und seiner relativen Lage in der Transportebene innerhalb der Quetschzone bemessen, wobei die Höhe des zweiten Trennmittels zwischen den Faserstreifen jedenfalls größer als die lichte Weite in der Quetschzone zwischen den beiden Transportwalzen ist. Das zweite Trennmittel und der beiden Transportwalzen sind dabei bevorzugt einander in einer Weise zugeordnet, dass ein Hineinquetschen eines einzelnen Filaments der parallel geführten Faserstreifen in die jeweilige Nut verhindert wird, die Zuordnung insoweit also spaltfrei ist und eine vollständige Trennung von jeweils zwei parallel geführten Faserstreifen in der zwischen den beiden Transportwalzen gebildeten Quetschzone ermöglicht wird. Die Nutbreite richtet sich nach der Breite des jeweils eingesetzten zweiten Trennmittels in der Quetschzone. Als Materialien für eine Trenneinrichtung kommen daher alle üblicherweise im Maschinenbau verwendeten Materialien ausreichender Festigkeit infrage. Mit dieser bevorzugten Ausführung der zweiten Trenneinrichtung wird zuverlässig eine vollständige Trennung der parallel die Quetschzone durchlaufenden Faserstreifen bewirkt.Advantageously, the complete penetration of the pinch zone is ensured by the extension blade extension by means of opposing grooves in the lateral surfaces of the transport roller pair, wherein the separation blade extension for complete separation of each two parallel fiber strips penetrates the two transport rollers in the crush zone without contact in grooves. The respective groove depth is dimensioned according to the dimensions of the second release agent and its relative position in the transport plane within the pinch zone, wherein the height of the second release agent between the fiber strips is in any case greater than the inside width in the pinch zone between the two transport rollers. The second release agent and the two transport rollers are preferably associated with each other in such a way that a squeezing of a single filament of the parallel fiber strips is prevented in the respective groove, the assignment so far is gap-free and a complete separation of two parallel guided fiber strips in the crushing zone formed between the two transport rollers is made possible. The groove width depends on the width of the respectively used second release agent in the nip. As materials for a separator, therefore, all commonly used in mechanical engineering materials of sufficient strength in question. With this preferred embodiment of the second separating device, complete separation of the fiber strips passing in parallel through the squeezing zone is reliably effected.

Die Forderung nach einer möglichst vollständigen Trennung der benachbarten Faserstreifen in der Quetschzone der Kräuselmaschine ist natürlich nicht nur auf die bevorzugte Art mit Trennschwertverlängerung und genuteten Transportwalzen als zweiter Trenneinrichtung zu erfüllen. Vielmehr wird der Fachmann die konstruktive Auslegung der zweiten Trenneinrichtung und jedes des von dieser umfassten zweiten Trennmittels in zweckmäßiger Weise unter Berücksichtigung der zu verarbeitenden Filamentmaterialien vornehmen, weshalb auch alle derartigen Ausführungsformen die eine gleichzeitige getrennte Führung einer Mehrzahl von Faserstreifen gewährleisten von der Erfindung umfasst und gleichermaßen bevorzugt sind. Alternativ zu der als bevorzugt angegebenen Ausführungsart können so etwa im Einzelfall Trennbleche bzw. Trennschwertverlängerungen mit halbkreisförmigen Ausnehmungen von Vorteil sein, wobei die Ausnehmungen jeweils so bemessen sind, dass sie die beiden Transportwalzen in der Quetschzone möglichst spaltfrei umschließen oder beispielsweise nur in Rillen geringer Tiefe berührungslos in der Art einer Nut-und-Feder-Verbindung durchdringen.Of course, the requirement for as complete as possible a separation of the adjacent fiber strips in the crimping zone of the crimping machine is not only to be met in the preferred manner with separating blade extension and grooved transport rollers as the second separating device. Rather, the person skilled in the constructive design of the second separator and each of the second release agent covered by this make appropriate taking into account the filament materials to be processed, which is why all such embodiments, the simultaneous simultaneous guidance of a plurality of fiber strips ensure of the invention and equally are preferred. As an alternative to the preferred embodiment, dividing plates or separating blade extensions may be used in individual cases be advantageous with semicircular recesses, wherein the recesses are each dimensioned so that they enclose the two transport rollers in the pinch zone as possible without gaps or penetrate, for example, only in grooves shallow depth without contact in the manner of a tongue-and-groove connection.

Die dritte Trenneinrichtung ist unmittelbar nach der zweiten Trenneinrichtung vorgesehen und ist im Anschlussbereich so gestaltet, dass eine unterbrechungsfreie Führung der benachbarten Faserstreifen von der Quetschzone in den Stauchkanal der Kräuselmaschine hinein gewährleistet ist. Wie die erste und zweite Trenneinrichtung umfasst auch die dritte Trenneinrichtung wenigstens ein drittes Trennmittel zwischen jeweils zwei der zu führenden Faserstreifen, um deren vollständig getrennte Führung zu ermöglichen.The third separating device is provided immediately after the second separating device and is designed in the connecting region so that an uninterrupted guiding of the adjacent fiber strips from the crushing zone into the compression channel of the crimping machine is ensured. Like the first and second separating means, the third separating means also comprises at least a third separating means between each two of the fiber strips to be led in order to allow their completely separate guidance.

Im Stauchkanal erfolgt die Kräuselung der mittels des Transportwalzenpaares parallel zugeführten Faserstreifen in bekannter Weise nach dem Stauchkammerprinzip, wobei die getrennte Führung der einzelnen Faserstreifen in der Transportebene während des Kräuselvorgangs durch einen Stauchkanalboden, eine bewegliche Stauchkanalabdeckung und entweder eine der beiden Stauchkanalseitenwände und ein drittes Trennmittel oder zwei der dritten Trennmittel in Transportrichtung gewährleistet ist.In the compression channel, the crimping of the transport roller pair supplied in parallel fiber strips in a known manner according to the stuffer box principle, wherein the separate leadership of the individual fiber strips in the transport plane during the crimping process by a compression channel bottom, a movable compression channel cover and either one of the two compression channel side walls and a third release agent or two of the third release agent is ensured in the transport direction.

Erfindungsgemäß ist die dritte Trenneinrichtung im Stauchkanal so ausgebildet, dass sie jedenfalls den Einlassbereich desselben in parallele Bereiche zum getrennten Führen der Faserstreifen beim Eintritt in den Stauchkanal unterteilt.According to the invention, the third separating device is formed in the compression channel so that it divides at least the inlet region thereof into parallel regions for separately guiding the fiber strips on entry into the compression channel.

Es kann allerdings auch von Vorteil sein, die dritte Trenneinrichtung so auszubilden, dass sie eine vollständig getrennte Führung der einzelnen Faserstreifen während der parallelen Kräuselbehandlung, also vom Eintreten bis zum Verlassen des Stauchkanals, ermöglicht. Dabei ist es bevorzugt, die dritte Trenneinrichtung mit wenigstens einem dritten Trennmittel in Form eines Trennstegs zwischen jeweils zwei benachbarten Faserstreifen vorzusehen, wobei sich der oder jeder Trennsteg vertikal zwischen dem Stauchkanalboden und der beweglichen Stauchkanalabdeckung erstreckt und in Längsrichtung den gesamten Stauchkanal unterteilt. Die in Einzelfällen ausreichende Separierung des Eintrittsbereichs des Stauchkanals wird gleichfalls bevorzugt mittels Trennstegen bewirkt.However, it may also be advantageous to design the third separating device in such a way that it permits completely separate guidance of the individual fiber strips during the parallel crimping treatment, that is to say from entry to exit of the compression channel. In this case, it is preferable to provide the third separating device with at least one third separating means in the form of a separating web between in each case two adjacent fiber strips, wherein the or each separating web extends vertically between the compression channel bottom and the movable compression channel cover and subdivides the entire compression channel in the longitudinal direction. In some cases, sufficient separation of the entry region of the compression channel is likewise preferably effected by means of separating webs.

In vorteilhafter Weise sind somit das erste Trennmittel im Einlaufbereich der Kräuselmaschine, das zweite Trennmittel im Bereich zwischen den Transportwalzen und das dritte Trennmittel im Stauchkanal zwischen jeweils zwei der parallel geführten Faserstreifen als jeweils separates Bauteil - und insoweit mehrteilig - in möglichst spaltfreier Anordnung vorgesehen. Allerdings ist es auch bevorzugt, das erste, zweite und dritte Trennmittel als ein einziges Bauteil - mithin einteilig - auszubilden, so dass es sich unterbrechungsfrei vom Einlaufbereich über die Quetschzone in den Stauchkanal der Kräuselmaschine erstreckt.Advantageously, therefore, the first release agent in the inlet region of the crimping, the second release agent in the area between the transport rollers and the third release agent in the compression channel between two parallel fiber strips each as a separate component - and insofar multipart - provided in as gap-free arrangement. However, it is also preferable to form the first, second and third separating means as a single component - thus in one piece - so that it extends without interruption from the inlet region via the pinch zone into the compression channel of the crimping machine.

Je nach konstruktiver Ausbildung der Kräuselmaschine kann darüber hinaus aber auch eine mehrteilige Ausführung des ersten, zweiten und dritten Trennmittels in der Form bevorzugt sein, dass das erste und zweite Trennmittel einteilig und in möglichst spaltfreier Anordnung zu einem separaten dritten Trennmittel ausgebildet sind. Weiter kann es gleichermaßen bevorzugt sein, dass das erste Trennmittel separat und das zweite und dritte Trennmittel einteilig und in möglichst spaltfreier Anordnung zum ersten Trennmittel vorgesehen sind. Schließlich kann es auch von Vorteil sein, das erste Trennmittel im Einlaufbereich der Kräuselmaschine, das zweite Trennmittel im Bereich zwischen den Transportwalzen und/oder das dritte Trennmittel im Stauchkanal jeweils mehrteilig und insoweit in Form von Trennmittelsegmenten vorzusehen, die wiederum möglichst spaltfrei einander zugeordnet sind.Depending on the constructive design of the crimping machine, however, a multi-part design of the first, second and third separating means in the form may furthermore be preferred in that the first and second separating means are formed in one piece and in as gap-free as possible a separate third separating means. Furthermore, it may equally be preferred that the first separating means be provided separately and the second and third separating means are provided in one piece and in as gap-free as possible arrangement with respect to the first separating means. Finally, it may also be advantageous to provide the first release agent in the inlet region of the crimping machine, the second release agent in the area between the transport rollers and / or the third release agent in the compression channel in each case in several parts and insofar in the form of release agent segments, which in turn are assigned to each other as gap-free as possible.

Die für den Kräuselvorgang erforderliche Klappbewegung der oberen Stauchkanalabdeckung ist durch eine entsprechende konstruktive Gestaltung des Stauchkanals und der davon umfassten dritten Trenneinrichtung sichergestellt.The folding movement of the upper compression channel cover required for the crimping operation is ensured by a corresponding structural design of the compression channel and the third separating device comprised thereof.

Die zur äußeren oder lateralen Begrenzung des Faserstreifentransportpfades bzw. der Faserstreifentransportebene innerhalb der Kräuselmaschine stets auch vorgesehenen lateralen Führungsmittel sind in bekannter Weise ausgebildet, etwa als Führungsbleche im Einlaufbereich, als auf die Transportwalzenenden aufgesetzte Scheiben mit gegenüber dem jeweiligen Walzendurchmesser vergrößerten Durchmesser im Quetschbereich oder als rinnenartig ausgebildete Rutschen für jeden einzelnen gekräuselten Faserstreifen im Auslaufbereich der Kräuselmaschine. Diese lateralen Begrenzungen des Faserstreifentransportpfades werden im Einlaufbereich als erste, im Bereich der Quetschzone als zweite und im Bereich des Stauchkanals als dritte seitliche Führungselemente bezeichnet.The lateral guide means, which are always provided for the outer or lateral boundary of the fiber strip transport path or the fiber strip transport plane within the crimping machine, are designed in a known manner, for example as guide plates in the inlet region, as discs placed on the transport roller ends with an enlarged diameter in the pinch region or as trough-like relative to the respective roller diameter trained chutes for each individual crimped fiber strip in the outlet region of the crimping machine. These lateral boundaries of the fiber strip transport path are the first in the inlet region, the second in the region of the pinch zone and the third lateral guide elements in the region of the compression channel designated.

Bevorzugt ist auch eine Herstellung der gekräuselten Faserstreifen mit gleicher oder unterschiedlicher Breite. Dies wird durch eine entsprechende Beabstandung der ersten, zweiten und dritten Trennmittel innerhalb des von den äußeren Führungsmitteln begrenzten Faserstreifentransportpfades bewirkt. Eine individuelle Steuerung der gekräuselten Faserstreifenbreite wird durch eine entsprechende Einstellung der Abstände zwischen den einzelnen Trennmitteln, gegebenenfalls unter Einbau weiterer oder Entfernung vorhandener Trennmittel, innerhalb des Faserstreifentransportpfads in bekannter Weise ermöglicht.Preference is also given to producing the crimped fiber strips with the same or different widths. This is effected by a corresponding spacing of the first, second and third release means within the fiber strip transport path defined by the outer guide means. An individual control of the crimped fiber strip width is made possible by a corresponding adjustment of the distances between the individual release agents, optionally with the incorporation of further or removal of existing release agents within the fiber strip transport path in a known manner.

Im Hinblick auf eine kostengünstige Bereitstellung der parallel erzeugten gekräuselten Faserstreifen ist es bevorzugt, diese nach Austritt aus der Kräuselmaschine zunächst separat in einem gemeinsamen Ablagebehälter abzulegen und anschließend in der gewünschten Menge zu gemeinsamen Ballen zu verpacken. Es kann auch vorteilhaft sein, diese Faserstreifen getrennt abzulegen, zu pressen und zu jeweils getrennten Ballen zu verpacken.With a view to cost-effective provision of the crimped fiber strips produced in parallel, it is preferable first to place them separately in a common storage container after leaving the crimping machine and then to pack them in the desired quantity into common bales. It may also be advantageous to deposit these fiber strips separately, to press them and to package them in separate bales.

Eine bevorzugte Ausführung der erfindungsgemäßen Vorrichtung ist in der beigefügten Figur 1 wiedergegeben.

Fig. 1
zeigt eine Kräuselmaschine zur gleichzeitigen, parallelen Herstellung zweier gekräuselter Faserstreifen mit erster, zweiter und dritter Trenneinrichtung und die darin geführten Faserstreifen in perspektivischer Darstellung.
A preferred embodiment of the device according to the invention is shown in the attached FIG. 1 played.
Fig. 1
shows a crimping machine for simultaneous, parallel production of two crimped fiber strips with first, second and third separating means and the fiber strips guided therein in a perspective view.

Die in Figur 1 dargestellte bevorzugte Ausführungsform der erfindungsgemäßen Vorrichtung ist zum parallelen Herstellen zweier gekräuselter Faser- bzw. Filtertowstreifen aus zwei voneinander getrennten, gleich breiten und ungekräuselten Faser- bzw. Filtertowstreifen (1, 2) mit im Wesentlichen in Transportrichtung ausgerichteten Celluloseacetat-Filamenten ausgebildet. Entsprechend der damit auszuführenden Kräuselfunktion, wird die erfindungsgemäße Vorrichtung auch als Kräuselmaschine (KM) bezeichnet.In the FIG. 1 illustrated preferred embodiment of the device according to the invention is for parallel production of two crimped fiber or Filtertowstreifen from two separate, equally wide and uncrimped fiber or Filtertowstreifen (1, 2) formed with substantially aligned in the transport direction cellulose acetate filaments. In accordance with the curling function to be performed therewith, the device according to the invention is also referred to as a crimping machine (KM).

Die dargestellte Kräuselmaschine (KM) umfasst zum gleichzeitigen, parallelen Zuführen von zwei ungekräuselten Faserstreifen (1, 2) einen Einlaufbereich (3). Dieser wird in bekannter Weise durch zwei in Transportrichtung (siehe Pfeil) der beiden Faserstreifen , (1, 2) seitlich angeordnete erste Führungselemente (32) in Form von Führungsblechen lateral begrenzt. Zwischen den lateralen Begrenzungen ist eine erste Trenneinrichtung (31) mit einem ersten Trennmittel (311) in Form eines Trennschwerts ausgebildet, das eine unterbrechungsfreie Führung der ebenfalls dargestellten ungekräuselten Faserstreifen (1, 2) im Einlaufbereich (3) in einer im Wesentlichen horizontalen Transportebene ermöglicht.The illustrated crimping machine (KM) comprises an inlet area (3) for simultaneous, parallel feeding of two uncrimped fiber strips (1, 2). This is in a known manner by two in the transport direction (see arrow) of the two fiber strips, (1, 2) laterally arranged first guide elements (32) laterally bounded in the form of guide plates. Between the lateral boundaries, a first separating device (31) is formed with a first separating means (311) in the form of a separating blade, which allows an uninterrupted guiding of the likewise uncrimped fiber strips (1, 2) in the inlet region (3) in a substantially horizontal transport plane ,

Zwischen dem Einlaufbereich (3) und einem Stauchkanal (7) ist ein motorisch angetriebenes Transportwalzenpaar (4, 5) angeordnet, das in bekannter Weise mit dem Stauchkanal (7) zusammenwirkt, um aus den zugeführten ungekräuselten Faserstreifen (1, 2) nach dem Stauchkammerprinzip die gewünschten gekräuselten Faserstreifen zu erzeugen.Between the inlet region (3) and a compression channel (7), a motor-driven transport roller pair (4, 5) is arranged, which cooperates in a known manner with the compression channel (7) from the supplied uncrimped fiber strips (1, 2) according to the stuffer box principle to produce the desired crimped fiber strips.

Durch die konstruktive Zuordnung des Einlaufbereichs (3) und des Transportwalzenpaars (4, 5) einerseits und des Transportwalzenpaars (4, 5) und des Stauchkanals (7) andererseits ist sichergestellt, dass sich die Transportebene horizontal über die Quetschzone (6) zwischen den beiden Transportwalzen (4, 5) in den Stauchkanal (7) erstreckt.Due to the structural assignment of the inlet region (3) and the transport roller pair (4, 5) on the one hand and the transport roller pair (4, 5) and the compression channel (7) on the other hand ensures that the transport plane horizontally across the pinch zone (6) between the two Transport rollers (4, 5) in the compression channel (7).

An die erste Trenneinrichtung (31) schließt sich spaltfrei eine zweite Trenneinrichtung (61) im Bereich zwischen den beiden Transportwalzen (4, 5) an; die zweite Transportwalze (5) ist aus Übersichtlichkeitsgründen gestrichelt dargestellt. Diese zweite Trenneinrichtung (61) umfasst ein zweites Trennmittel (611) in Form einer Verlängerung des als erstes Trennmittel (311) vorgesehenen Trennschwertes. Zum Zwecke einer vollständig getrennten Führung der beiden ungekräuselten Faserstreifen (1, 2) im Transportwalzenbereich über die Quetschzone (6) hinweg, weist jede der beiden Transportwalzen (4, 5) eine Nut mit einer Tiefe der etwa halben Breite der Trennschwertverlängerung auf, wodurch ein vollständiges, spaltfreies und berührungsloses Durchdringen von Trennschwertverlängerung und Transportwalzenpaar (4, 5) gewährleistet ist und wodurch insoweit ein vollständig voneinander getrenntes Transportieren und Verdichten der beiden ungekräuselten Faserstreifen (1, 2) durch das Transportwalzenpaar (4, 5) ermöglicht wird.A second separating device (61) adjoins the first separating device (31) in the region between the two transporting rollers (4, 5) without a gap; the second transport roller (5) is shown by dashed lines for clarity. This second separating device (61) comprises a second separating means (611) in the form of an extension of the separating blade provided as the first separating means (311). For the purpose of a completely separate guidance of the two uncrimped fiber strips (1, 2) in the transport roller area over the pinch zone (6), each of the two transport rollers (4, 5) has a groove with a depth of about half the width of the separation blade extension, whereby a complete, gap-free and non-contact penetration of the separating blade extension and transport roller pair (4, 5) is ensured and thus far a completely separate transporting and compressing the two uncrimped fiber strips (1, 2) by the transport roller pair (4, 5) is possible.

Zur lateralen Führung der beiden ungekräuselten Faserstreifen (1, 2) im Transportwalzenbereich ist jeweils ein zweites seitliches Führungselement (62) in spaltfreier Anordnung mit dem jeweils entsprechenden ersten seitlichen Führungselement (32) im Einlaufbereich (3) vorgesehen.For the lateral guidance of the two uncrimped fiber strips (1, 2) in the transport roller area, a second lateral guide element (62) is in each case arranged in a gap-free arrangement provided with the respectively corresponding first lateral guide element (32) in the inlet region (3).

Wiederum spaltfrei schließt sich an die als zweites Trennmittel (611) vorgesehene Trennschwertverlängerung die dritte Trenneinrichtung (71) im Stauchkanal (7) an. Diese weist einen Trennsteg als drittes Trennmittel (711) auf, der sich über die gesamte Länge und Höhe der Stauchkammer (7) erstreckt und der mit dem Stauchkanalboden, jeweils einer Stauchkanalseitenwand - als drittes seitliches Führungselement (72) zur lateralen Begrenzung der Transportebene - und der beweglichen Stauchkanalabdeckung, zwei getrennte, parallel angeordnete Stauchkanäle zur räumlich getrennten Kräuselung der beiden parallel geführten Faserstreifen definiert. Das jeweils dritte seitliche Führungselement (72) schließt sich spaltfrei an das entsprechende zweite seitliche Führungselement (62) an.Again without a gap, the third separating device (71) in the compression channel (7) adjoins the separating blade extension provided as the second separating means (611). This has a separating web as a third separating means (711) which extends over the entire length and height of the stuffer box (7) and with the Stauchkanalboden, each an edging channel side wall - as a third lateral guide element (72) for lateral delimitation of the transport plane - and the movable compression channel cover, two separate, parallel compression channels defined for spatially separated crimping of the two parallel fiber strips. The respective third lateral guide element (72) adjoins the corresponding second lateral guide element (62) without gaps.

Zur getrennten Ablage der beiden gekräuselten Faserstreifen mündet der zweigeteilte Stauchkanal (7) in einen Auslaufbereich (8) mit zwei Rutschen, um jeweils einen der beiden gekräuselten Faserstreifen abzulegen.For separate storage of the two crimped fiber strips of the two-part compression channel (7) opens into a discharge area (8) with two slides to deposit one of the two crimped fiber strips.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

KMKM
Kräuselmaschinecrimper
1, 21, 2
Faserstreifen / FiltertowstreifenFiber stripes / filter tow strips
33
Einlaufbereichintake area
3131
erste Trenneinrichtungfirst separator
311311
erstes Trennmittelfirst release agent
3232
erstes seitliches Führungselementfirst lateral guide element
4, 54, 5
Transportwalzetransport roller
66
Quetschzonecrush zone
6161
zweite Trenneinrichtungsecond separator
611611
zweites Trennmittelsecond release agent
6262
zweites seitliches Führungselementsecond lateral guide element
77
Stauchkanal / StauchkammerCompression channel / stuffer box
7171
dritte Trenneinrichtungthird separator
711711
drittes Trennmittelthird release agent
7272
drittes seitliches Führungselementthird lateral guide element
88th
Auslaufbereich / RutscheOutlet area / slide

Claims (18)

  1. A process for the simultaneous, parallel production of crimped fibre strips, particularly filter tow strips, in a crimping machine (KM) with an inlet region (3), a nip zone (6) formed between two transporting rolls (4, 5) and a stuffer channel (7), having the following process steps:
    a) simultaneous, parallel feeding of a plurality of fibre strips (1, 2) via the inlet region (3), the fibre strips being guided separately in the inlet region (3) using a first separating device (31),
    b) simultaneous, parallel transporting and compacting of the fibre strips in the nip zone (6) by means of the two transporting rolls (4, 5) and
    c) simultaneous, parallel crimping of the fibre strips in the stuffer channel (7), characterized in that the fibre strips are respectively guided separately in process step b) using a second separating device (61) and in process c) using a third separating device (71), the first, second and third separating devices (31, 61, 71) being formed in such a way that the parallel separate guidance of the fibre strips from the inlet region (3) through the nip zone (6) into the stuffer channel (7) takes place uninterruptedly.
  2. A process according to claim 1, characterized in that process step a) is carried out using a first separating device (31) with at least one first separating means (311) and process step b) is carried out using a second separating device (61) with at least one second separating means (611), a first and second separating means (311, 611) being arranged between in each case two of the fibre strips (1, 2) in such a way that the latter are guided in parallel while completely separate.
  3. A process according to claim 2, characterized in that process step a) is carried out using a separating blade as the first separating means (311) and process step b) is carried out using a separating blade extension as the second separating means (611), the complete separation of in each case two of the fibre strips (1,2) guided in parallel by a separating blade and a separating blade extension being brought about in an arrangement without any gap and the separating blade extension penetrating the two transporting rolls (4, 5) in the region of the nip zone (6) completely and without any gap.
  4. A process according to claim 3, characterized in that process step b) is carried out using the separating blade extension between in each case two of the fibre strips (1, 2) which penetrates the two transporting rolls (4, 5) in the region of the nip zone (6) contactlessly in grooves.
  5. A process according to claim 1, characterized in that, in process step c), the fibre strips (1, 2) are guided using the third separating device (71) in such a way that they are completely separate from when they enter the stuffer channel (7) to when they leave it.
  6. A process according to claim 1 or 5, characterized in that process step c) is carried out using a third separating device (71) with at least one third separating means (711), a third separating means (711) being arranged between in each case two of the fibre strips (1,2) in such a way that the latter are guided in parallel while completely separate.
  7. A process according to claim 6, characterized in that process step c) is carried out using a separating web as the third separating means (711), the complete separation of in each case two of the fibre strips (1, 2) guided in parallel being brought about by a separating web.
  8. A process according to claim 2, 3, 6 or 7, characterized in that, in the process steps a) to c), a first, second and third separating means (311, 611, 711) are arranged between in each case two of the fibre strips (1, 2) guided in parallel in such a way that the fibre strips are guided in parallel and completely separately with the same width or with different widths from the inlet region (3) through the nip zone (6) into the stuffer channel (7).
  9. A process according to claim 8, characterized in that the first, second and third separating means (311, 611, 711) are used between in each case two of the fibre strips (1, 2) guided in parallel as a one-part separating means or as a multi-part separating means with a first, second and third separating region.
  10. A process according to at least one of claims 1 to 9, characterized in that, after leaving the stuffer channel (7), the fibre strips (1, 2) crimped in accordance with process step c) are deposited in a common depository.
  11. An apparatus (KM) for the simultaneous, parallel production of crimped fibre strips, particularly filter tow strips, having an inlet region (3) with a first separating device (31) for the simultaneous, parallel and separate feeding of a plurality of fibre strips (1, 2), a pair of transporting rolls (4, 5) for the simultaneous, parallel transporting and compacting of the fibre strips in a nip zone (6) and a stuffer channel (7) for the simultaneous, parallel crimping of the fibre strips, characterized in that a second separating device (61) for separate transporting and compacting is provided in the nip zone (6) and a third separating device (71) for separate crimping of the fibre strips is provided in the stiffer channel (7), the first, second and third separating devices (31, 61, 71) being formed in such a way that the fibre strips can be separately guided in parallel from the inlet region (3) through the nip zone (6) into the stuffer channel (7) uninterruptedly.
  12. An apparatus according to claim 11, characterized in that the first separating device (31) comprises at least one first separating means (311) and the second separating device (61) comprises at least one second separating means (611), a first and second separating means (311, 611) being arranged between in each case two of the fibre strips (1, 2) in such a way that the latter can be guided separately and uninterruptedly.
  13. An apparatus according to claim 12, characterized in that the first separating means (311) is formed as a separating blade and the second separating means (611) is formed as a separating blade extension, a separating blade and a separating blade extension being arranged such that they are connected without any gap between in each case two of the fibre strips (1, 2) in such a way that the separating blade extension penetrates through the two transporting rolls (4, 5) in the region of the nip zone (6) completely and without any gap.
  14. An apparatus according to claim 13, characterized in that the separating blade extension between in each case two of the fibre strips (1, 2) penetrates the two transporting rolls (4, 5) in the region of the nip zone (6) contactlessly in grooves.
  15. The apparatus according to claim 11, characterized in that the third separating device (71) is formed in such a way that the fibre strips (1, 2) can be guided separately and uninterruptedly from the inlet to the outlet of the stuffer channel (7).
  16. The apparatus according to claim 11 or 15, characterized in that the third separating device (71) comprises at least one third separating means (711), a third separating means (711) being arranged between in each case two of the fibre strips (1, 2) in such a way that the latter can be guided separately and uninterruptedly.
  17. The apparatus according to claim 16, characterized in that the third separating means (711) is formed as a separating web, a separating web being arranged between in each case two of the fibre strips (1, 2) in such a way that the latter can be guided separately and uninterruptedly.
  18. The apparatus according to claim 12 or 13 and 16 or 17, characterized in that a first, second and third separating means (311, 611, 711) are arranged between in each case two of the fibre strips (1, 2) guided in parallel in such a way that the fibre strips can be guided in parallel and uninterruptedly separately with the same width or with different widths from the inlet region (3) through the nip zone (6) into the stuffer channel (7).
EP10705553.5A 2009-02-23 2010-02-18 Method for producing multiple fiber strips in parallel and apparatus for executing said method Active EP2398945B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009010208A DE102009010208A1 (en) 2009-02-23 2009-02-23 Method for producing a plurality of fiber strips in parallel and apparatus for carrying out this method
PCT/EP2010/001032 WO2010094488A1 (en) 2009-02-23 2010-02-18 Method for producing multiple fiber strips in parallel and apparatus for executing said method

Publications (2)

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EP2398945A1 EP2398945A1 (en) 2011-12-28
EP2398945B1 true EP2398945B1 (en) 2015-01-28

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US (1) US8769785B2 (en)
EP (1) EP2398945B1 (en)
JP (1) JP5688378B2 (en)
KR (1) KR101669697B1 (en)
CN (1) CN102317517B (en)
AR (1) AR075536A1 (en)
BR (1) BRPI1005406B1 (en)
CA (1) CA2749400A1 (en)
DE (1) DE102009010208A1 (en)
MX (1) MX2011008237A (en)
RU (1) RU2499853C2 (en)
TW (1) TW201031777A (en)
UA (1) UA102586C2 (en)
WO (1) WO2010094488A1 (en)

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JP2020509253A (en) * 2017-02-28 2020-03-26 イーストマン ケミカル カンパニー Cellulose acetate fiber in nonwoven fabric

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US3505155A (en) * 1963-11-21 1970-04-07 Celanese Corp Nonwoven continuous filament product and method of preparation
US3406436A (en) * 1965-11-30 1968-10-22 Allied Chem Crimping process
US3553802A (en) * 1968-04-04 1971-01-12 Techniservice Corp Strand crimping
CH517448A (en) 1970-10-12 1972-01-15 Burrus & Cie Method for producing a cigarette filter unit and device for carrying out the method
DE2504534A1 (en) * 1975-02-04 1976-08-19 Huels Faserwerke Synthetic fibre convertor bands - which are produced with higher output by dividing up threads before crimping
JPS5324422A (en) * 1976-08-19 1978-03-07 Nippon Ester Co Ltd Production of chippy fibrous materials of polyester staple fibers
JPS564724A (en) * 1979-06-20 1981-01-19 Nippon Ester Co Ltd Dividable crimped tow and production
US5020198A (en) * 1988-08-10 1991-06-04 Filter Materials Ltd. Crimped textile fibers and stuffer box apparatus and methods for crimping textile fibers
JP3134103B2 (en) * 1991-03-30 2001-02-13 株式会社竹原機械研究所 Fiber crimping device
US5683777A (en) * 1993-06-16 1997-11-04 Rhone-Poulenc Rhodia Ag Multiple width fiber strip and method and apparatus for its production
DE4320303C1 (en) * 1993-06-18 1995-02-16 Rhodia Ag Rhone Poulenc Multi-wide fiber strips and a method and an apparatus for the production thereof
US5974777A (en) * 1998-04-21 1999-11-02 Davis; David M Yarn texturizer cooling drum
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DE10010176B4 (en) * 2000-03-02 2005-10-06 Reemtsma Cigarettenfabriken Gmbh Method and device for producing an additive-treated filter cable
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DE102007022112A1 (en) * 2006-05-18 2007-11-22 Saurer Gmbh & Co. Kg Treatment equipment producing compressed synthetic thread, is operated with reduced internal pressure and includes permeable guide tracks separated by impermeable tracks

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BRPI1005406B1 (en) 2019-11-26
UA102586C2 (en) 2013-07-25
AR075536A1 (en) 2011-04-06
JP5688378B2 (en) 2015-03-25
KR101669697B1 (en) 2016-11-09
WO2010094488A1 (en) 2010-08-26
DE102009010208A1 (en) 2010-08-26
TW201031777A (en) 2010-09-01
KR20110127715A (en) 2011-11-25
EP2398945A1 (en) 2011-12-28
CA2749400A1 (en) 2010-08-26
CN102317517A (en) 2012-01-11
MX2011008237A (en) 2011-09-06
US20120013036A1 (en) 2012-01-19
US8769785B2 (en) 2014-07-08
BRPI1005406A2 (en) 2016-07-05
JP2012518725A (en) 2012-08-16
CN102317517B (en) 2014-02-05
RU2499853C2 (en) 2013-11-27
RU2011138936A (en) 2013-03-27

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