EP0294571B1 - Method and apparatus for straightening fibres - Google Patents
Method and apparatus for straightening fibres Download PDFInfo
- Publication number
- EP0294571B1 EP0294571B1 EP88106463A EP88106463A EP0294571B1 EP 0294571 B1 EP0294571 B1 EP 0294571B1 EP 88106463 A EP88106463 A EP 88106463A EP 88106463 A EP88106463 A EP 88106463A EP 0294571 B1 EP0294571 B1 EP 0294571B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fibres
- clamping
- raw material
- feed means
- fleece
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 12
- 239000000835 fiber Substances 0.000 claims description 53
- 239000002994 raw material Substances 0.000 claims description 19
- 239000004753 textile Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 239000004745 nonwoven fabric Substances 0.000 description 12
- 238000005259 measurement Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- 238000009960 carding Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G25/00—Lap-forming devices not integral with machines specified above
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
- D01G15/02—Carding machines
- D01G15/12—Details
- D01G15/46—Doffing or like arrangements for removing fibres from carding elements; Web-dividing apparatus; Condensers
- D01G15/64—Drafting or twisting apparatus associated with doffing arrangements or with web-dividing apparatus
Definitions
- the invention relates to a method for aligning fibers, according to the preamble of claim 1.
- the field of application of the invention lies in the treatment of textile raw material, from which nonwovens with parallelized and hook-free fibers are formed. These nonwovens can be used in various ways, two of which are particularly mentioned.
- samples are taken from these nonwovens which are used for a fiber length measurement.
- the fibers of these samples are end-classified in a device and transferred to a measuring base, on which the fiber length is measured in a further device and the stack diagram, ie the representation of the entirety of the fibers, sorted according to the fiber length, is determined automatically.
- nonwovens can be produced in the spinning mill with larger dimensioned machines, which means that necessary work steps can be saved in the usual spinning mill preparation.
- machines for flake feeding, flake dissolving (carding / carding) and two line passages can be dispensed with.
- the invention seeks to remedy this.
- the invention as characterized in the claims, achieves the object of further developing a method of the type described at the outset so that the production of nonwovens with parallelized and check-free fibers can be produced entirely by machine.
- the nonwoven fabric formed from the stacked fiber tufts is fed with the side having the dissolved and parallelized fibers first to the same processing to dissolve and parallelize the tangled fibers on the other side of the fiber tufts and to duplicate the fiber tufts to the nonwoven.
- the invention also encompasses an apparatus for aligning fibers present in a textile raw material in a tangled arrangement to form a non-woven fabric having parallelized and check-free fibers, the task of which is to optimally carry out the method according to the invention.
- This object is achieved according to the invention by the characterizing features of claim 6.
- 1 is the raw material, e.g. Cotton flakes, wool hair and the like., With which the device is fed continuously or intermittently.
- the raw material 1 is first fed into a pre-stretching unit 6 formed from two pairs of rollers 2, 3 and 4.
- the fibers of the raw material 1 are pre-oriented by a relatively small distortion approx. 1, 2 or 3 times.
- the pre-drafting unit 6 can be designed as a conventional construction with an adjustable spacing between the roller pairs 2, 3 and 4, 5.
- pre-stretching unit 6 with a constant distance between the roller pairs 2, 3 and 4, 5 and to make the pre-stretching independent of the fiber length by skillfully distributing the forces on the roller pairs.
- the fiber material does not move continuously in the pre-drafting unit 6, but is in synchronism with the movement of a feed unit 7 arranged downstream of the pre-drafting unit 6, the feed unit being carried out in small steps.
- the feed unit 7 is composed of two belt drives 8, 9, the roller 10 on the output side of which is considerably smaller than the roller 11 on the input side.
- the feed of the belt drives 8, 9, which takes place in small steps, is symbolized by a series of small arrows 12.
- the raw material 1 is again warped.
- the distance between the pair of rollers 11, 10 of the feed unit 7 must be at least the length of the longest individual fibers that are to be processed with the device, because the fiber tufts must cover the entire max. Retained length when undressing.
- the fibers are held between the belts 13 of the belt drives 8, 9 and moved to the exit side of the belt drives 8, 9. The holding force may only be so great that the fibers can be pulled out without damage.
- the belts 19 of the pull-out device 16 run continuously.
- the speed of the belts 19 must be chosen so high that the longest individual fibers that are to be processed with the device can be completely pulled out within one step of the feed unit 7.
- the pinch rollers 14, 15 thus pull out a fine fiber beard.
- This drawn-out fiber beard still has many tangled fibers on the front - viewed in the direction of movement - while on the back the fibers are loosened, parallelized and largely free of hooks.
- the pull-out device 16 now brings the drawn-out mustaches to a suction drum 20.
- the size and direction of the peripheral speed of the suction drum 20 corresponds to that Extraction speed of the extraction device 16. Air is sucked into the interior of the drum through a porous surface of the suction drum 20. As a result, the beards stick to the outside of the drum. The constantly new fiber beards gradually cover the entire circumference of the drum. The whiskers get caught in the suction air, creating a uniform fleece. If the fleece is sufficiently compact, ie all the beards are connected, the suction drum is stopped. The fleece is interrupted with a separating device and removed from the suction drum. This fleece, which is referred to as an intermediate fleece, has only tangled fibers in one direction.
- the intermediate fleece detached from the suction drum 20 and designated by an arrow 21 is now coated with the back, i.e. with the dissolved fibers first, fed into another device which, like the device described above, is composed of a pre-drafting unit 6, a feed unit 7, a pull-out device 16 and a suction drum 20.
- the intermediate fleece 21 can be fed backwards into the same device. In both cases, the still tangled fibers are pulled out and thus dissolved and parallelized.
- a fleece suitable for further processing can now be removed from the suction drum 20, for example for the end arrangement in a fiber straightening device, see Patent No. 670,836.
- the device shown in Fig. 1 can be changed in various ways without losing its function, i.e. the purely mechanical formation of a fleece with parallelized and unchecked fibers is changed. It is thus possible to drive the feed unit 7 continuously. Further changes are shown in FIG. 2.
- a series of short arrows 12 means a discontinuous feed, while longer individual arrows 22 mean a continuous feed.
- the pre-stretch value 6, which is practically only used in one embodiment, is followed by the feed unit 7, which can be designed as a continuous feed unit 23 or as a discontinuous feed unit 24 or as a reciprocating pliers 25.
- the feed unit 7 which can be designed as a continuous feed unit 23 or as a discontinuous feed unit 24 or as a reciprocating pliers 25.
- the raw material is fed continuously or discontinuously.
- a larger number of designs can be provided for the pull-out device 16.
- roller pairs 30, 31; 32, 33; 34, 35 and 36, 37 or pliers 38 are used instead of the belt drives 17, 18 or belt drives 26, 27 or 28, 29 used in FIG. 1, roller pairs 30, 31; 32, 33; 34, 35 and 36, 37 or pliers 38 are used.
- the pair of rollers 30, 31 and the belt drives 17, 18 run continuously, while the pair of rollers 32, 33 is driven discontinuously.
- the pair of rollers 34, 35 runs continuously. However, since the smaller roller 35 is periodically lifted off the larger roller 34, the raw material is removed discontinuously here. The same also applies to the pair of rollers 36, 37.
- the larger roller 36 has a sector with a smaller radius, within which there is no contact with the small roller 37.
- the operation of the belt drives 26, 27 is discontinuous. The raw material is only taken along when clamping strips 39 arranged on the outside of the strips meet.
- the feed of the raw material is also discontinuous. This can be used to combine a feed unit 7 with a continuous or discontinuous feed. Practically all of the variants shown in FIG. 2 can be combined with one another.
- the suction drum 20 or a conveyor belt 40 is used, by means of which the latter makes it possible to produce fleeces of any length.
- nonwovens for measurement purposes.
- the feed unit 6 of the pull-out device 7 and of the conveyor belt 40 for the doubling of the drawn-out fiber tufts, whereby the fibers can also be dissolved and parallelized in a second pass, nonwovens, e.g. for spinning, can be manufactured in a simpler way.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Nonwoven Fabrics (AREA)
- Preliminary Treatment Of Fibers (AREA)
Description
Die Erfindung betrifft ein Verfahren zum Ausrichten von Fasern, gemäss dem Oberbegriff des Anspruchs 1.The invention relates to a method for aligning fibers, according to the preamble of claim 1.
Das Anwendungsgebiet der Erfindung liegt in der Behandlung von textilem Rohmaterial, aus welchem Vliese mit parallelisierten und häkchenfreien Fasern formiert werden. Diese Vliese können in verschiedener Weise weiterverwendet werden, wovon zwei Anwendungen besonders erwähnt seien. Einerseits werden aus diesen Vliesen Proben entnommen, die für eine Faserlängenmessung verwendet werden. Hierzu werden die Fasern dieser Proben in einem Gerät endeingeordnet und auf eine Messunterlage übertragen, auf welcher in einem weiteren Gerät die Faserlänge gemessen und das Stapeldiagramm, d.h. die Darstellung der Gesamtheit der Fasern, nach der Faserlänge geordnet, selbsttätig ermittelt wird. Bezüglich der Messung der Faserlänge sei auf die beiden druckschriftlichen Veröffentlichungen der Anmelderin "Messung der Faserlänge für Kurzstapel-Fasern AL 100/101, Vorschrift für die Mustervorbereitung und Kurzanleitung für die Mustervorbereitung in Verbindung mit einem Fasermischgerät" verwiesen. Aus diesen Druckschriften geht hervor, dass die Formierung der Vliese für die Mustervorbereitung zur Messung der Faserlänge weitgehend manuell ausgeführt werden muss. Die Messung der Faserlänge hängt somit zu einem guten Teil von der Fertigkeit der diese Arbeit auszuführenden Person ab.The field of application of the invention lies in the treatment of textile raw material, from which nonwovens with parallelized and hook-free fibers are formed. These nonwovens can be used in various ways, two of which are particularly mentioned. On the one hand, samples are taken from these nonwovens which are used for a fiber length measurement. For this purpose, the fibers of these samples are end-classified in a device and transferred to a measuring base, on which the fiber length is measured in a further device and the stack diagram, ie the representation of the entirety of the fibers, sorted according to the fiber length, is determined automatically. With regard to the measurement of the fiber length, reference is made to the applicant's two printed publications "Measurement of the fiber length for short staple fibers AL 100/101, instructions for sample preparation and brief instructions for sample preparation in connection with a fiber mixing device". These documents show that the formation of the nonwovens for the preparation of the pattern to measure the fiber length largely must be carried out manually. The measurement of the fiber length therefore depends to a large extent on the skill of the person to be carried out this work.
Andererseits können mit grösser dimensionierten Maschinen Vliese in der Spinnerei erzeugt werden, wodurch bei der üblichen Spinnereivorbereitung notwendige Arbeitsgänge eingespart werden können. Insbesondere kann auf Maschinen für die Flockenspeisung, Flockenauflösung (Karde/Krempel) und auf zwei Streckenpassagen verzichtet werden.On the other hand, nonwovens can be produced in the spinning mill with larger dimensioned machines, which means that necessary work steps can be saved in the usual spinning mill preparation. In particular, machines for flake feeding, flake dissolving (carding / carding) and two line passages can be dispensed with.
Aus der EP-A-0.137.585 HOLLINGWORTH LTD. ist eine Vorrichtung zur Behandlung von Fasermaterial bekannt, bei der ein Faservlies auf einer Vakuumsaugtrommel mit Perforationen einer kombinierten Reinigungs- und Streckoperation unterworfen wird. Die Verstreckung des Faservlieses erfolgt bei dieser bekannten Vorrichtung jedoch als Ganzes, ohne dass einzelne diskrete Faserbüschel aus dem Vlies ausgezogen werden. Eine spätere Rekombination und Aufdoublierung einzelner Faserbüschel ist somit bei dieser Vorrichtung nicht vorgesehen.From EP-A-0.137.585 HOLLINGWORTH LTD. an apparatus for treating fiber material is known in which a nonwoven fabric on a vacuum suction drum with perforations is subjected to a combined cleaning and stretching operation. In this known device, however, the stretching of the fiber fleece takes place as a whole, without individual discrete fiber tufts being pulled out of the fleece. A later recombination and duplication of individual tufts of fibers is therefore not provided for in this device.
Hier will die Erfindung Abhilfe schaffen. Die Erfindung, wie sie in den Ansprüchen gekennzeichnet ist, löst die Aufgabe, ein Verfahren der eingangs beschriebenen Art so weiter auszugestalten, dass die Herstellung von Vliesen mit parallelisierten und häkchenfreien Fasern vollständig maschinell hergestellt werden kann.The invention seeks to remedy this. The invention, as characterized in the claims, achieves the object of further developing a method of the type described at the outset so that the production of nonwovens with parallelized and check-free fibers can be produced entirely by machine.
Zweckmässigerweise wird das aus den aufeinandergelegten Faserbüscheln gebildete Vlies mit der die aufgelösten und parallelisierten Fasern aufweisenden Seite voran derselben Bearbeitung zur Auflösung und Parallelisierung der auf der anderen Seite der Faserbüschel nach vorhandenen wirren Fasern und zum Aufdoublieren der Faserbüschel zum Vlies zugeführt.Advantageously, the nonwoven fabric formed from the stacked fiber tufts is fed with the side having the dissolved and parallelized fibers first to the same processing to dissolve and parallelize the tangled fibers on the other side of the fiber tufts and to duplicate the fiber tufts to the nonwoven.
Die Erfindung umfasst auch ein Gerät zum Ausrichten von in einem textilen Rohmaterial in wirrer Anordnung vorliegenden Fasern zu einem, parallelisierten und häkchenfreien Fasern aufweisenden Vlies, dessen Aufgabe die optimale Durchführung des erfindungsgemässen Verfahrens ist. Diese Aufgabe wird gemäss der Erfindung durch die kennzeichnenden Merkmale des Anspruchs 6 gelöst.The invention also encompasses an apparatus for aligning fibers present in a textile raw material in a tangled arrangement to form a non-woven fabric having parallelized and check-free fibers, the task of which is to optimally carry out the method according to the invention. This object is achieved according to the invention by the characterizing features of
Das erfindungsgemässe Verfahren wird anhand eines schematisch dargestellten Ausführungsbeispiels eines erfindungsgemässen Gerätes nachfolgend beschrieben. In der Zeichnung zeigen
- Fig.1
- eine schematische Darstellung eines Gerätes zum Ausrichten von in einem textilen Rohmaterial in wirrer Anordnung vorliegenden Fasern und
- Fig.2
- eine bildhafte, schematische Darstellung von Varianten des Gerätes nach Fig. 1.
- Fig. 1
- is a schematic representation of a device for aligning existing in a textile raw material in a tangled arrangement fibers and
- Fig. 2
- a pictorial, schematic representation of variants of the device according to FIG. 1.
Bei dem in Fig. 1 schematisch dargestellten Gerät, das z.B. für die Formierung von Vliesen für die Musteranfertigung einsetzbar ist, siehe die eingangs genannten Druckschriften, ist mit 1 das Rohmaterial, z.B. Baumwollflocken, Wollhaare u.dgl., bezeichnet, mit dem das Gerät kontinuierlich oder auch intermittierend beschickt wird. Das Rohmaterial 1 wird zunächst in ein aus zwei Walzenpaaren 2,3 und 4,5 gebildetes Vorstreckwerk 6 eingegeben. In dem Vorstreckwerk 6 wird durch einen verhältnismässig kleinen Verzug ca. 1-,2- bis 3-fach eine Vororientierung der Fasern des Rohmaterials 1 erreicht. Das Vorstreckwerk 6 kann als konventionelle Konstruktion mit einstellbarem Abstand der Walzenpaare 2,3 und 4,5 ausgebildet sein. Es ist aber auch möglich, hierzu ein Vorstreckwerk 6 mit konstantem Abstand der Walzenpaare 2,3 und 4,5 zu verwenden und das Vorstrecken durch eine geschickte Verteilung der Kräfte an den Walzenpaaren unabhängig von der Faserlänge zu machen. Das Fasermaterial bewegt sich in dem Vorstreckwerk 6 nicht kontinuierlich, sondern ist synchron mit der Bewegung einer dem Vorstreckwerk 6 nachgeordneten Vorschubeinheit 7, deren Vorschub in kleinen Schritten erfolgt.In the device shown schematically in Fig. 1, e.g. can be used for the formation of nonwovens for sample production, see the publications mentioned at the beginning, 1 is the raw material, e.g. Cotton flakes, wool hair and the like., With which the device is fed continuously or intermittently. The raw material 1 is first fed into a
Die Vorschubeinheit 7 setzt sich aus zwei Bandantrieben 8, 9 zusammen, deren ausgangsseitige Walze 10 wesentlich kleiner ist als die eingangsseitige Walze 11. Der in kleinen Schritten erfolgende Vorschub der Bandantriebe 8, 9 ist durch eine Reihe kleiner Pfeile 12 symbolisiert.The
Zwischen dem Vorstreckwerk 6 und der Vorschubeinheit 7 wird dem Rohmaterial 1 nochmals ein Verzug aufgebracht. Der Abstand des Walzenpaares 11, 10 der Vorschubeinheit 7 muss mindestens die Länge der längsten Einzelfasern, die mit dem Gerät verarbeitet werden sollen, betragen, denn die Faserbüschel müssen über die gesamte max. Länge beim Ausziehen zurückgehalten werden. Zwischen den Bändern 13 der Bandantriebe 8, 9 werden die Fasern gehalten und zur Ausgangsseite der Bandantriebe 8, 9 bewegt. Die Haltekraft darf hierbei nur so gross sein, dass die Fasern ohne Schädigung herausgezogen werden können.Between the
Die Fasern gelangen nun schrittweise in den Bereich von zwei Klemmwalzen 14, 15 einer Auszugvorrichtung 16, die aus zwei Bandantrieben 17, 18 aufgebaut ist. Die Bänder 19 der Auszugvorrichtung 16 laufen im Gegensatz zu den Bändern der Vorschubeinheit 7 kontinuierlich. Die Geschwindigkeit der Bänder 19 muss hierbei so gross gewählt werden, das die längsten Einzelfasern, welche mit dem Gerät verarbeitet werden sollen, innerhalb eines Schrittes der Vorschubeinheit 7 vollständig ausgezogen werden können. Die Klemmwalzen 14, 15 ziehen somit einen feinen Faserbart aus. Dieser ausgezogene Faserbart besitzt auf der Vorderseite - in Richtung der Bewegung betrachtet - noch viele wirr liegende Fasern, während auf der Rückseite jedoch die Fasern aufgelöst, parallelisiert und weitgehend häkchenfrei sind.The fibers now gradually reach the area of two
Die Auszugsvorrichtung 16 bringt die ausgezogenen Faserbärte nun zu einer Saugtrommel 20. Die Umfangsgeschwindigkeit der Saugtrommel 20 entspricht in ihrer Grösse und Richtung der Auszugsgeschwindigkeit der Auszugvorrichtung 16. Durch eine poröse Oberfläche der Saugtrommel 20 wird Luft in das Trommelinnere gesaugt. Dadurch haften die Faserbärte an der Trommelaussenseite. Die ständig neu dazukommenden Faserbärte bedecken nach und nach den gesamten Umfang der Trommel. Die Faserbärte verhaken sich durch die Saugluft, so entsteht ein gleichmässiges Vlies. Ist das Vlies genügend kompakt, d.h. alle Faserbärte hängen zusammen, so wird die Saugtrommel gestoppt. Mit einer Trennvorrichtung wird das Vlies unterbrochen und von der Saugtrommel entfernt. Dieses als Zwischenvlies bezeichnete Vlies besitzt nur in der einen Richtung noch wirre Fasern.The pull-out
Das von der Saugtrommel 20 abgelöste, mit einem Pfeil 21 bezeichnete Zwischenvlies wird nun mit der Rückseite, d.h. mit den aufgelösten Fasern voran, in ein weiteres Gerät eingespeist, das sich wie das vorstehend beschriebene Gerät aus einem Vorstreckwerk 6, einer Vorschubeinheit 7, einer Auszugvorrichtung 16 und einer Saugtrommel 20 zusammensetzt.The intermediate fleece detached from the
Verfügt man nicht über ein zweites Gerät, kann das Zwischenvlies 21 mit der Rückseite voran nochmals in dasselbe Gerät eingespeist werden. In beiden Fällen werden dadurch auch die noch wirren Fasern ausgezogen und damit aufgelöst und parallelisiert. Von der Saugtrommel 20 kann nun ein zur Weiterverarbeitung geeignetes Vlies entnommen werden, z.B. für die Endenanordnung in einem Faserrichtgerät, siehe Patent Nr. 670.836.If one does not have a second device, the
Das in Fig. 1 dargestellte Gerät kann in verschiedener Weise geändert werden, ohne dass dadurch seine Funktion, d.h. die rein maschinelle Bildung eines Vlieses mit parallelisierten und häkchenfreien Fasern geändert wird. So ist es möglich, die Vorschubeinheit 7 kontinuierlich anzutreiben. Weitere Änderungen sind in Fig. 2 dargestellt.The device shown in Fig. 1 can be changed in various ways without losing its function, i.e. the purely mechanical formation of a fleece with parallelized and unchecked fibers is changed. It is thus possible to drive the
In Fig. 2 werden dieselben Bezugszahlen wie in Fig. 1 verwendet. Eine Reihe kurzer Pfeile 12 bedeutet einen diskontinuierlichen Vorschub, während längere Einzelpfeile 22 einen kontinuierlichen Vorschub bedeuten.The same reference numbers are used in FIG. 2 as in FIG. 1. A series of
Dem Vorstreckwert 6, das praktisch nur in einer Ausführung eingesetzt wird, folgt die Vorschubeinheit 7, die als kontinuierliche Vorschubeinheit 23 oder als diskontinuierliche Vorschubeinheit 24 oder als hin- und herbewegte Zange 25 ausgebildet sein kann. Beim Einsatz einer Zange 25 erfolgt der Vorschub des Rohmaterials kontinuierlich oder diskontinuierlich.The
Für die Auszugvorrichtung 16 kann eine grössere Anzahl Ausführungen vorgesehen werden. Insbesondere können anstelle der in Fig. 1 verwendeten Bandantriebe 17, 18 oder von Bandantrieben 26, 27 bzw. 28, 29 Walzenpaare 30, 31; 32, 33; 34, 35 und 36, 37 oder eine Zange 38 eingesetzt werden.A larger number of designs can be provided for the pull-out
Das Walzenpaar 30, 31 und die Bandantriebe 17, 18 laufen kontinuierlich, während das Walzenpaar 32, 33 diskontinuierlich angetrieben wird.The pair of
Das Walzenpaar 34, 35 läuft kontinuierlich. Da jedoch die kleinere Walze 35 periodisch von der grösseren Walze 34 abgehoben wird, wird hier das Rohmaterial diskontinuierlich abgeführt. Das gleiche gilt auch für das Walzenpaar 36, 37. Die grössere Walze 36 weist einen Sektor mit kleinerem Radius auf, innerhalb welchem kein Kontakt mit der kleinen Walze 37 stattfindet. Bei den Bandantrieben 26, 27 ist der Betrieb diskontinuierlich. Es erfolgt nur eine Mitnahme des Rohmaterials, wenn auf der Aussenseite der Bänder angeordnete Klemmleisten 39 zusammentreffen.The pair of
Bei den Bandantrieben 28, 29 ist der Transport des Bandmaterials ebenfalls diskontinuierlich, da eingangsseitig die eine Walze des Bandantriebes 29 periodisch von der Gegenwalze wegbewegt wird.In the case of the belt drives 28, 29, the transport of the belt material is likewise discontinuous, since the one roller of the
Bei der Zange 38 ist der Vorschub des Rohmaterials ebenfalls diskontinuierlich. Mit dieser kann eine Vorschubeinheit 7 mit kontinuierlichem oder diskontinuierlichem Vorschub kombiniert werden. Es sind praktisch alle der in Fig. 2 dargestellten Varianten miteinander kombinierbar.With the
Nach dem Ausziehen der Faserbärte werdendiese zu einem Vlies aufdoubliert. Hierzu wird die Saugtrommel 20 oder ein Förderband 40 verwendet, mit welch letzterem es möglich ist, beliebig lange Vliese herzustellen.After pulling out the fiber beards, they are doubled to form a fleece. For this purpose, the
Mit dem beschriebenen Gerät können nicht nur Vliese für Messzwecke hergestellt werden. Bei entsprechender Vergrösserung der Dimensionen der Vorschubeinheit 6 der Auszugvorrichtung 7 und des Förderbandes 40 für das Aufdoublieren der ausgezogenen Faserbüschel, wobei auch das Auflösen und Parallelisieren der Fasern in einem zweiten Durchgang kontinuierlich erfolgen kann, können Vliese, z.B. für die Spinnerei, auf einfachere Weise hergestellt werden.With the device described, it is not only possible to manufacture nonwovens for measurement purposes. With a corresponding enlargement of the dimensions of the
Claims (15)
- A method for orienting fibres, which are present in a disordered arrangement in a textile raw material, and for forming a fleece with parallelized, hooklet-free fibres, the raw material arranged in a strip-like manner being given an advance movement by means of feed means, characterized in that the raw material projecting over the feed means is being clamped continuously or in rapid sequence by means of a clamping device and fibre tufts are being drawn therefrom under parallelization of the fibres, whereupon the fleece is formed by doubling the drawn fibre tufts, which on their clamping side exhibit approximately the same arrangement of the fibres as in the raw material and which on their opposite side are provided with parallel and hooklet-free fibres.
- A method according to claim 1, characterized in that the raw material, prior to its advancement and drawing, is subjected to a preliminary drawing.
- A method according to claim 1 or 2, characterized in that a constant or intermittent advance movement is imparted to the raw material.
- A method according to one of the claims 1 to 3, characterized in that the projecting fibres, subsequent to their being clamped by the clamping device, are drawn out at a higher speed compared with the advance movement.
- A method according to one of the claims 1 to 4, characterized in that the fleece formed from the doubled fibre tufts with the side opposite to the clamping side of the single fibre tufts is supplied again to a feed means, which imparts the fleece an advance movement, and that the material of the fleece projecting over the feed means is being clamped continuously or in rapid sequence by means of a clamping device and fibre tufts are being drawn therefrom under parallelization of the fibres for disentangling and parallelizing the tangled fibres still present on the former clamping side of the fibres tufts, whereupon another fleece is formed by renewed doubling of the drawn fibre tufts.
- Apparatus for carrying out the method according to one of the claims 1 to 5, characterized in that an extracting device (16) for drawing fibre tufts is provided, which is coupled to the feed means (7) for supplying the raw material, the feed means (7) holding the raw material between belts (13) or a gripping device (25) for retaining the fibres during the drawing process, and that the extracting device (16) is followed by doubling means (20,40).
- Apparatus according to claim 6, characterized in that the extracting device (16) is provided, as means for clamping the fibres, with a continuously or discontinuously driven clamping roller pair (14,15), whose clamping rollers forming the clamping point have the same or different diameters, are at least temporarily adjacent with their peripheries and roll on one another (30,31; 32,33; 34,35; 36,37).
- Apparatus according to claim 6, characterized in that the extracting device (16) is provided, as means for clamping the fibres, with two cooperating belt drives (22; 26,27; 28,29) with in each case one belt, a driving roller and a deflecting roller, whose belts are temporarily or periodically pressed together by means of the roller oriented to the feed means (7).
- Apparatus according to claim 8, characterized in that the belts of the belt drives (26,27) are externally provided with clamping strips (39), which in the vicinity of the roller pair directed against the feed means (7) form a clamping point.
- Apparatus according to claim 8, characterized in that one roller (35) of the roller pair directed against the feed means (7) is reciprocatable with respect to the other roller (34) and on contact with the latter forms the clamping point between the rollers (34,35).
- Apparatus according to claim 8, characterized in that the means for clamping the fibres are constructed as a clampable and detachable gripping device (38) with means for reciprocating the same.
- Apparatus according to one of the claims 6 to 11, characterized in that in the extracting device (16) means (14,15) are provided for clamping the fibres, which have a higher speed compared with the speed of the feed means (7).
- Apparatus according to one of the claims 6 to 12, characterized in that the doubling means (20,40) is constructed as a suction drum (20), as an electrostatically chargeable drum or as a conveyor belt (40) with a smaller advance speed than that of the extracting device (16).
- Apparatus according to one of the claims 6 to 13, characterized in that the feed means (7) is formed from two synchronously driven belt drives (8,9), which are continuously (23) or discontinuously (24) driven.
- Apparatus according to one of the claims 6 to 13, characterized in that the feed means (7) is a clampable and detachable gripping device (25) with reciprocating means.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1825/87A CH674854A5 (en) | 1987-05-12 | 1987-05-12 | |
| CH1825/87 | 1987-05-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0294571A1 EP0294571A1 (en) | 1988-12-14 |
| EP0294571B1 true EP0294571B1 (en) | 1992-02-05 |
Family
ID=4219479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88106463A Expired - Lifetime EP0294571B1 (en) | 1987-05-12 | 1988-04-22 | Method and apparatus for straightening fibres |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4885823A (en) |
| EP (1) | EP0294571B1 (en) |
| CH (1) | CH674854A5 (en) |
| DE (1) | DE3868293D1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0578955A1 (en) * | 1992-07-15 | 1994-01-19 | Maschinenfabrik Rieter Ag | Lap package production |
| EP0666795A1 (en) * | 1992-10-29 | 1995-08-16 | Exxon Research And Engineering Company | Composites and methods of manufacturing the same |
| DE4323472C2 (en) * | 1993-07-14 | 1997-08-07 | Inst F Textil Und Verfahrenste | Double apron drafting system |
| CH689127A5 (en) * | 1994-02-10 | 1998-10-15 | Zellweger Uster Ag | Method for measuring the tearing strength of fibers. |
| CH693344A5 (en) * | 1998-08-28 | 2003-06-13 | Rieter Ag Maschf | Assembly for cleaning fiber laps and slivers has a mesh drum where the material is divided into fiber packets to be transferred to a cleaning drum for the extraction of dirt and debris |
| DE50211901D1 (en) * | 2001-04-23 | 2008-04-24 | Autefa Automation Gmbh | Method for profiling a nonwoven and profiling device |
| DE102013107793A1 (en) | 2013-07-22 | 2015-01-22 | Visiotex GmbH | Process for producing a leather yarn |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2709834A (en) * | 1951-12-12 | 1955-06-07 | Louis Danenberg | Means for making longitudinallystriped extrusions of plasticized material |
| US2795010A (en) * | 1952-04-10 | 1957-06-11 | Joh Jacob Rieter & Co Ltd | Means for producing a drawable staple sliver |
| US2889583A (en) * | 1952-06-03 | 1959-06-09 | Lohmann Kg | Method and device for superposing of fibre-fleeces |
| DE1107565B (en) * | 1954-03-10 | 1961-05-25 | Curlator Corp | Machine for the production of a fiber fleece |
| GB802451A (en) * | 1955-06-08 | 1958-10-08 | Tno | Improvements relating to the blending of fibrous material to be spun into thread |
| FR1243942A (en) * | 1959-09-11 | 1960-10-21 | Alsacienne Constr Meca | Straight-line comber lifting device |
| JPS4891324A (en) * | 1972-03-03 | 1973-11-28 | ||
| GB8319928D0 (en) * | 1983-07-25 | 1983-08-24 | Hollingsworth Uk Ltd | Treatment of fibrous materials |
| DE8535078U1 (en) * | 1985-12-13 | 1986-02-06 | Bockemühl-Wüllenweber, Horst, 5275 Bergneustadt | Comb chair |
-
1987
- 1987-05-12 CH CH1825/87A patent/CH674854A5/de not_active IP Right Cessation
-
1988
- 1988-04-22 EP EP88106463A patent/EP0294571B1/en not_active Expired - Lifetime
- 1988-04-22 DE DE8888106463T patent/DE3868293D1/en not_active Expired - Fee Related
- 1988-05-09 US US07/192,234 patent/US4885823A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE3868293D1 (en) | 1992-03-19 |
| US4885823A (en) | 1989-12-12 |
| EP0294571A1 (en) | 1988-12-14 |
| CH674854A5 (en) | 1990-07-31 |
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