EP0128863B1 - Method and device for manufacturing a cored yarn - Google Patents

Method and device for manufacturing a cored yarn Download PDF

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Publication number
EP0128863B1
EP0128863B1 EP84810240A EP84810240A EP0128863B1 EP 0128863 B1 EP0128863 B1 EP 0128863B1 EP 84810240 A EP84810240 A EP 84810240A EP 84810240 A EP84810240 A EP 84810240A EP 0128863 B1 EP0128863 B1 EP 0128863B1
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EP
European Patent Office
Prior art keywords
retention surface
fiber
fiber retention
core thread
fibers
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Expired
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EP84810240A
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German (de)
French (fr)
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EP0128863A1 (en
Inventor
Louis Vignon
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Maschinenfabrik Rieter AG
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Heberlein Hispano SA
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Priority to AT84810240T priority Critical patent/ATE27621T1/en
Publication of EP0128863A1 publication Critical patent/EP0128863A1/en
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    • 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
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/36—Cored or coated yarns or threads
    • D02G3/367—Cored or coated yarns or threads using a drawing frame

Definitions

  • a thread or fiber composite e.g. DE-A-2613263, DE-A-2656787, DE-A-2806991, GB-A-1231198.
  • a core thread can also be introduced coaxially into the thread formation line between the surfaces, around which the fibers are then wound around by the surfaces.
  • a core consisting of a stretched fiber sliver which passes through a swirl generator formed by two rotating sieve drums is oriented and parallelized in the twister in the form of a stretched fiber sliver.
  • the fibers should be fed in transversely to the direction of the core so that the fibers fed in are wound onto the core with the smallest possible slope. This is the best way to prevent the twist of the soul from dissolving after the twist.
  • the smallest possible slope of the fibers wound on the core has the consequence that these fibers only make a comparatively small contribution to the tensile strength in the finished winding yarn.
  • the object of the invention is therefore to design the method for producing a winding yarn specified in the preamble of patent claim 1 such that the fibers fed in parallel to the core are still largely stretched and parallelized in the finished yarn and have a large pitch in order to achieve the highest possible To ensure the strength of the yarn.
  • the object is achieved according to the invention in that the fibers held on the fiber holding surface of the core are fed in their axial direction of movement in front of the swirl generator in a direction which forms an acute angle of at most 60 ° with the axial direction of movement of the core, which is based on the Core winding fibers are retained by the fiber holding surface, and that the first drawn fiber sliver is fed directly coming from a second drafting system, the rollers of which lie on the same axes as the rollers of the first-mentioned drafting system.
  • the process according to the invention thus differs from the process known from AT-A-361814 and AT-A-354906 in that fibers are fed to the rotating core in front of the swirl device, that is to say on a fiber holding surface separated from the swirl device, the movement speed of which is different from that
  • the peripheral speed of the core is independent and is selected so that the fibers that wind on the core are retained by the fiber holding surface.
  • the fibers therefore remain taut and maintain their parallel layers.
  • the fibers on the fiber holding surface are fed to the core in a direction which forms an acute angle with the axial direction of movement of the core.
  • the fibers fed are therefore wound onto the core with a large pitch and also have a large pitch in the finished winding yarn, so that they can make a significant contribution to the strength of the yarn.
  • the coaxial arrangement of the two drafting systems also distinguishes the invention in an advantageous manner from the unpublished EP-A-0085635, in which fibers also coming from a drafting system are fed to a fiber holding surface before their point of contact with a core, the core being in certain embodiments one of a second, separate drafting device coming fiber sliver can be used.
  • the fibers are retained on the fiber holding surface with a suitable force that does not prevent the transfer, but creates the desired tension of the fibers.
  • the force for holding the fibers on the fiber holding surface can expediently be generated in such a way that an air-permeable fiber holding surface is used and a negative pressure is maintained on the rear side thereof.
  • other forces could also be used instead, for example electrostatic attractive forces.
  • a device for carrying out the method according to the invention which parallelized a swirl sensor, a delivery device for feeding a core to the swirl sensor, which delivery device contains a drafting device for a fiber sliver, a movable fiber-holding surface touching the core and a second drafting device for the supply of oriented
  • fibers to the fiber holding surface at a point lying in the direction of movement thereof in front of the point of contact with the core are characterized in that the fiber holding surface is separate from the swirl sensor and can be moved independently of it and the point of contact of the fiber holding surface with the core in the direction of movement of the latter in front of the swirl device lies that at the point of contact between the fiber holding surface and the core, the direction of movement of the fiber holding surface forms an acute angle of at most 60 ° with the axial direction of movement of the core and that the rollers of the second drafting device ks lie on the same axes as the rollers of the former drafting system.
  • the devices shown in FIGS. 1 and 3 each contain a delivery device for a thread core 1, which delivery device has the form of a drafting device 2 for a fiber sliver 3 (or possibly also two or three fiber slabs).
  • the core 1 can also contain a finished core thread, preferably an endless filament, in addition to the fiber sliver 3.
  • the core 1 delivered by the drafting unit 2 runs to a swirl generator 4 or 4 ', which in the example shown consists of two mutually opposite, approximately parallel discs 5, 6 and 5', 6 ', which rotate in opposite directions and touch the thread at a circumferential point a and set it in rotation.
  • the axes 5a and 6a of the two friction disks are preferably offset from one another perpendicular to the axis of the thread (perpendicular to the plane of the drawing), so that they also exert a force in the conveying direction on the thread at the contact point a.
  • the two friction disks 5 and 6 are practically rigid disks that can carry friction linings made of, for example, polyurethane plastic on their mutually facing sides (not shown).
  • the disc 5 ' is a resilient, flexible disc which e.g. consists of polyurethane plastic and which is pressed in the area of the thread contact point a by one or more spring-loaded rollers 15 with adjustable force against the other friction disc 6.
  • the freely axially moving and rotating core 1 oriented, parallelized fibers F are fed which, while they come into contact with the core and are captured by it are held back so that they are wound up by the rotating soul.
  • the fibers are fed in by means of a rotating feed element, which is shown as a hollow disk 8 or 8 ′ which can be rotated with a shaft 7.
  • the hollow disk 8 in FIG. 1 has an annular, conical fiber holding surface 9 coaxial with the shaft 7, and it is arranged and inclined so that the peripheral surface of the core 1 at point C touches this fiber holding surface 9.
  • the fiber holding surface 9 is air permeable, e.g. B. perforated, and a negative pressure is maintained inside the hollow disc 8, on the back of the surface 9, which holds the fibers F on the surface 9 until they are caught and wound up by the rotating core 1.
  • the shaft 7 of the hollow disk 8 can be mounted in a rear end body 17 which is attached to a fixed support 18.
  • An air outlet opens into the cavity 19 surrounding the shaft bearing 16 between the closing body 17 and the disk 8
  • Suction hose 20 which is connected to a vacuum source (not shown), which maintains a vacuum on the back of the perforated fiber holding surface 9.
  • a vacuum source not shown
  • the end body 17 can have a surface which has a smaller distance in the area of the fiber transfer point C from the rear side of the perforated fiber holding surface 9 than in other areas.
  • Such a surface of the end body 17 can also be arranged inclined, as shown at 21, such that by rotating the end body 17 about the axis of the shaft 7 at a given point on the circumference, the distance between the surface 21 and the back of the fiber holding surface 9 - and thus the strength of the suction effect on the relevant area of the surface 9 - can be changed.
  • the end body 17 In order to enable the end body 17 to be rotated, it is fastened to the carrier 18 with a screw 22, the head of which lies in a groove 23 in the end body that is curved in an arc around the axis of the shaft bearing 16.
  • the hollow disk 8 'in FIG. 3 can also have a similar construction. This also has an annular fiber holding surface 9 ', which, however, is cylindrical and lies on the circumference of the disk 8'. The fiber holding surface 9 ′ also affects the peripheral surface of the core 1 at point C.
  • the direction of movement R of the surface 9 forms an acute angle a, z. B. about 45 ° or between 30 ° and 60 °.
  • the angle between the direction of movement of the surface 9 'and the axial direction of movement of the core 1 can be even smaller and for example between 5 and 10 °.
  • the speed of movement of the surface 9 or 9 ' should be slightly lower than the peripheral speed of the rotating core 1 at the contact point C, e.g. about 10 to 20% smaller, so that the supplied fibers F are not pushed onto the core, but instead have to be pulled off from the surface 9 or 9 '.
  • the core 1 is preferably rotated in such a direction that its peripheral speed on the side contacting the surface 9 or 9 ′ is opposite to the component of the direction R perpendicular to the axis of the core 1.
  • R is the direction of movement of the surface 9 or 9 'at the contact point C or the direction of the tangential feed of the fibers F to the core 1.
  • the fibers fed are not clamped between the core 1 and the surface 9, but by the rotating core pulled upwards away from the surface 9 or 9 '.
  • rotation of core 1 and surface 9 or 9 'in the same direction is also possible.
  • the oriented, parallelized fibers F which are transported to the core 1 on the surface 9 or 9 ', are fed to this surface 9 or 9' directly from a drafting system 10 which is fed with a fiber sliver 11.
  • This transfer of the fibers F from the drafting system 10 to the surface 9 or 9 ' should also take place under tension so that the fibers remain stretched and do not lose their orientation.
  • the delivery speed of the drafting system 10 should therefore be lower than the speed of movement of the annular surface 9 or 9 ', e.g. about 10 to 20% smaller.
  • the drafting units 2 and 10 in parallel or coaxially with one another.
  • the corresponding rollers or roller sections of the two drafting systems, with which the core 1 and the fibers F to be fed to it are produced simultaneously from a fiber sliver 3 or 11, can thus, as shown, each lie on the same axis, so that for the two drafting systems only one drive device is required.
  • the fiber slivers 3 and 11 are advantageously fed in parallel coming from the same direction.
  • the core 1 with the fibers F wound around it runs as a thread 12 through the swirl sensor 4 or 4 'and to a take-off device 13.
  • This can consist in the usual way of a driven metal roller and a rubber roller pressed against it.
  • the thread 12 can then be wound up in a conventional manner (not shown).
  • a spun thread 12 of high strength is therefore obtained in the manner described, although the soul 1 is fed as a stretched fiber sliver.
  • core 1 can also be incorporated into core 1, preferably an endless filament with high tensile strength. Thanks to the drawn fiber sliver, which is also fed into the core, there is only a slight risk, despite the smooth surface of the continuous filament, that the wound fibers F move axially in the finished thread 12.
  • enveloping fibers F are applied to the core 1 at only one point C by means of only one fiber feed element 8 or 8 '; Of course, one could also use two or more similar rotating feeders to feed oriented, parallelized fibers to the running core at several points in succession. Fibers of various types could also be added.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

A twist is imparted to fiber slubbing (1) exiting from drawing rollers (2) by means of twister (4). Oriented, parallelized fibers (F) are applied to rotating fiber slubbing (1) in front of or within twister (4), the fibers (F) wrapping themselves around core thread (1). Because of these fibers (F), the twist of fiber slubbing (1) no longer unravels completely after twister (4), so that a spun thread (12) of great strength is obtained. The feed of fiber (F) to fiber slubbing (1) occurs by means of rotating feed element (8). It has a circular perforated surface (9), behind which a negative pressure is maintained to keep fibers (F) on the surface. The oriented, parallelized fibers (F) exit from drawing rollers (10) and are conveyed to perforated surface (9). The rotating fiber slubbing (1) comes into contact with surface (9) and then draws fibers (F) from surface (9). So that fibers (F) remain oriented and drawn during transfer, the speed of movement of perforated surface (9) is greater than the rate of feed of drawing rollers (10) and less than the circumferential speed of fiber slubbing (1).

Description

Es ist bekannt, lose Fasern in den Zwischenraum zwischen zwei Oberflächen, z.B. Siebtrommeln, einzuführen, die gegensinnig zueinander bewegt werden und die Fasern zu einem Faden oder Faserverbund zusammendrehen (z.B. DE-A-2613263, DE-A-2656787, DE-A-2806991, GB-A-1231198). Dabei kann auch gewünschtenfalls in die Fadenbildungslinie zwischen den Oberflächen koaxial ein Kernfaden eingeführt werden, um den die Fasern dann von den Oberflächen herumgewickelt werden.It is known to insert loose fibers into the space between two surfaces, e.g. Sieve drums, which are moved in opposite directions to each other and twist the fibers together to form a thread or fiber composite (e.g. DE-A-2613263, DE-A-2656787, DE-A-2806991, GB-A-1231198). If desired, a core thread can also be introduced coaxially into the thread formation line between the surfaces, around which the fibers are then wound around by the surfaces.

In einer Weiterentwicklung dieses Verfahrens ist auch schon vorgeschlagen worden. (DE-A-2809000), in die Fadenbildungslinie koaxial eine Seele einzuführen, die aus einer verstreckten Faserlunte besteht, welche unmittelbar aus einem Streckwerk kommt. Dieser Seele wird durch die gegensinnig zueinander bewegten Oberflächen ein Drall erteilt, der sich nach dem Verlassen der Oberflächen wegen der von den Oberflächen auf die Seele aufgebrachten Fasern nicht mehr vollständig auflöst.A further development of this method has already been proposed. (DE-A-2809000) to coaxially insert a core into the thread formation line, which core consists of a stretched fiber sliver which comes directly from a drafting system. This soul is given a twist by the oppositely moving surfaces, which after leaving the surfaces no longer completely dissolves due to the fibers applied to the soul by the surfaces.

In anderen bekannten Verfahren, z.B. DE-A-2065441 oder ähnlich CH-A-615554, werden frei fliegende Fasern einer rotierenden Seele vor einem Drallgeber zugeführt. Auch hier wickeln sich die zugeführten Fasern auf die Seele, so dass sich der der Seele erteilte Drall nach dem Drallgeber nicht mehr vollständig auflöst. In der CH-A-615554 wird dabei eine luftdurchlässige Faserhaltefläche verwendet, die mit der Seele in Berührung steht.In other known methods, e.g. DE-A-2065441 or similar CH-A-615554, free-flying fibers are fed to a rotating core in front of a swirl device. Here, too, the fibers that are fed in are wound on the soul, so that the twist given to the soul no longer completely dissolves after the twister. In CH-A-615554 an air-permeable fiber holding surface is used which is in contact with the soul.

Die vorstehend geschitderten bekannten Verfahren weisen den Nachteil auf, dass die lose bzw. frei fliegend zugeführten Einzelfasern naturgemäss kaum eine gemeinsame Orientierung haben und daher nicht gestreckt und parallelisiert auf eine Seele oder einen Kern aufgewickelt werden können, auch dann nicht, wenn sie von einer Faserhaltefläche, wie in der genannten CH-A-615554, zurückgehalten werden.The known methods described above have the disadvantage that the loose or free-flying single fibers naturally have hardly any common orientation and therefore cannot be stretched and parallelized onto a core or core, even if they are from a fiber holding surface as in said CH-A-615554.

In den Vorrichtungen nach der AT-A:361814 und AT-A-354906 werden einer aus einer verstreckten Faserlunte bestehenden Seele, die einen von zwei rotierenden Siebtrommeln gebildeten Drallgeber durchläuft, in dem Drallgeber Fasern in Form einer verstreckten Faserlunte orientiert und parallelisiert zugeführt. Die Zufuhr der Fasern soll quer zur Richtung der Seele erfolgen, damit sich die zugeführten Fasern mit möglichst geringer Steigung auf die Seele wickeln. In dieser Weise werde die Wiederauflösung des Dralles der Seele nach dem Drallgeber am besten verhindert. Die möglichst geringe Steigung der auf die Seele gewickelten Fasern hat jedoch zur Folge, dass diese Fasern im fertigen Umwindegarn nur einen vergleichsweise geringen Beitrag zur Zugfestigkeit liefern. Zudem ist es in den angegebenen AT-Patentschriften nicht möglich, die Enden der zugeführten Fasern während des Aufwickelns auf die Seele auf den Siebtrommeln zurückzuhalten und die Fasern gestreckt aufzuwickeln, weil die Geschwindigkeit der Oberflächen der Siebtrommeln, die gleichzeitig als Drallgeber wirken müssen, gezwungenermassen höher sein muss als die Umfangsgeschwindigkeit der Seele. Denn andernfalls könnten wegen der zwischen den Siebtrommeln und der Seele herrschenden gleitenden Reibung die Siebtrommeln kein Drehmoment auf die Seele ausüben. Im Hinblick auf die Festigkeit und Gleichmässigkeit des erzeugten Umwindegarnes, insbesondere bei einem feinen Garn, wäre es jedoch wünschbar, dass in dem Garn möglichst alle Fasern nicht nur weitgehend parallelisiert vorliegen, sondern auch möglichst gestreckt sind und eine vergleichsweise grosse Steigung aufweisen.In the devices according to AT-A: 361814 and AT-A-354906, a core consisting of a stretched fiber sliver which passes through a swirl generator formed by two rotating sieve drums is oriented and parallelized in the twister in the form of a stretched fiber sliver. The fibers should be fed in transversely to the direction of the core so that the fibers fed in are wound onto the core with the smallest possible slope. This is the best way to prevent the twist of the soul from dissolving after the twist. However, the smallest possible slope of the fibers wound on the core has the consequence that these fibers only make a comparatively small contribution to the tensile strength in the finished winding yarn. In addition, it is not possible in the specified AT patents to hold back the ends of the supplied fibers while winding them onto the core on the sieve drums and to wind them up stretched because the speed of the surfaces of the sieve drums, which also have to act as a swirler, is necessarily higher must be as the peripheral speed of the soul. Otherwise, because of the sliding friction between the sieve drums and the soul, the sieve drums could not exert any torque on the soul. With regard to the strength and uniformity of the wrapping yarn produced, in particular in the case of a fine yarn, it would be desirable, however, for all the fibers in the yarn not only to be largely parallel, but also to be as straight as possible and to have a comparatively large pitch.

Die Aufgabe der Erfindung besteht daher darin, dass im Oberbegriff des Patentanspruchs 1 angegebene Verfahren zum Herstellen eines Umwindegarnes derart auszugestalten, dass die der Seele parallelisiert zugeführten Fasern auch im fertigen Garn noch weitgehend gestreckt und parallelisiert sind und eine grosse Steigung aufweisen, um eine möglichst hohe Festigkeit des Garnes zu gewährleisten.The object of the invention is therefore to design the method for producing a winding yarn specified in the preamble of patent claim 1 such that the fibers fed in parallel to the core are still largely stretched and parallelized in the finished yarn and have a large pitch in order to achieve the highest possible To ensure the strength of the yarn.

Die Aufgabe wird erfindungsgemäss dadurch gelöst, dass die auf der Faserhaltefläche gehaltenen Fasern der Seele in deren axialer Bewegungsrichtung vor dem Drallgeber in einer Richtung zugeführt werden, die mit der axialen Bewegungsrichtung der Seele einen spitzen Winkel von höchstens 60° bildet, wobei die sich auf die Seele wickelnden Fasern von der Faserhaltefläche zurückgehalten werden, und dass die erste verstreckte Faserlunte unmittelbar aus einem zweiten Streckwerk kommend zugeführt wird, dessen Walzen auf den gleichen Achsen liegen wie die Walzen des erstgenannten Streckwerks.The object is achieved according to the invention in that the fibers held on the fiber holding surface of the core are fed in their axial direction of movement in front of the swirl generator in a direction which forms an acute angle of at most 60 ° with the axial direction of movement of the core, which is based on the Core winding fibers are retained by the fiber holding surface, and that the first drawn fiber sliver is fed directly coming from a second drafting system, the rollers of which lie on the same axes as the rollers of the first-mentioned drafting system.

Das erfindungsgemässe Verfahren unterscheidet sich somit von dem aus der AT-A-361814 und AT-A-354906 bekannten Verfahren dadurch, dass Fasern zu der rotierenden Seele vor dem Drallgeber zugeführt werden, das heisst auf einer vom Drallgeber getrennten Faserhaltefläche, deren Bewegungsgeschwindigkeit von der Umfangsgeschwindigkeit der Seele unabhängig ist und so gewählt wird, dass die sich auf die Seele wickelnden Fasern von der Faserhaltefläche zurückgehalten werden. Die Fasern bleiben daher gespannt und behalten ihre parallelisierten Lagen bei. Die Fasern auf der Faserhaltefläche werden zu der Seele in einer Richtung zugeführt, die mit der axialen Bewegungsrichtung der Seele einen spitzen Winkel bildet. Die zugeführten Fasern werden daher mit einer grossen Steigung auf die Seele aufgewickelt und haben auch im fertigen Umwindegarn eine grosse Steigung, so dass sie einen wesentlichen Beitrag zur Festigkeit des Garnes liefern können. Ein zusätzlicher vorteilhafter Unterschied besteht darin, dass für die Lieferung der Fasern auf die vom Drallgeber gesonderte Faserhaltefläche und für die Lieferung der verstreckten Faserlunte der Seele zwei Streckwerke mit koaxialen Streckwerkswalzen bzw. -walzenabschnitten verwendet werden, während in den genannten AT-Patentschriften das die aufzuwickelnden Fasern in den Drallgeber liefernde Streckwerk jeweils quer zur Seele angeordnet sein muss. Die koaxiale Anordnung der Streckwerke gestattet nicht nur einen kompakten Aufbau mit nur einer gemeinsamen Antriebseinrichtung für die beiden Streckwerke, sondern ermöglicht auch die Zufuhr der beiden Faserlunten zu den Streckwerken aus der gleichen Richtung kommend.The process according to the invention thus differs from the process known from AT-A-361814 and AT-A-354906 in that fibers are fed to the rotating core in front of the swirl device, that is to say on a fiber holding surface separated from the swirl device, the movement speed of which is different from that The peripheral speed of the core is independent and is selected so that the fibers that wind on the core are retained by the fiber holding surface. The fibers therefore remain taut and maintain their parallel layers. The fibers on the fiber holding surface are fed to the core in a direction which forms an acute angle with the axial direction of movement of the core. The fibers fed are therefore wound onto the core with a large pitch and also have a large pitch in the finished winding yarn, so that they can make a significant contribution to the strength of the yarn. An additional advantageous difference is that for the delivery of the fibers on the fiber holding surface separate from the twist and for the delivery of the drawn fiber sliver of the core, two drafting devices with coaxial drafting device rollers or roller sections are used, whereas in the AT patents mentioned this is to be wound up Fibers in the drafting device supplying the swirl device must be arranged transversely to the core. The Coaxial arrangement of the drafting systems not only permits a compact construction with only one common drive device for the two drafting systems, but also enables the supply of the two fiber slivers to the drafting systems coming from the same direction.

Die koaxiale Anordnung der beiden Streckwerke unterscheidet die Erfindung auch in vorteilhafter Weise von der nicht vorveröffentlichten EP-A-0085635, in der ebenfalls von einem Streckwerk kommende Fasern einer Faserhaltefläche vor deren Berührungsstelle mit einer Seele zugeführt werden, wobei als Seele in gewissen Ausführungsformen eine von einem zweiten, separaten Streckwerk kommende Faserlunte verwendet werden kann.The coaxial arrangement of the two drafting systems also distinguishes the invention in an advantageous manner from the unpublished EP-A-0085635, in which fibers also coming from a drafting system are fed to a fiber holding surface before their point of contact with a core, the core being in certain embodiments one of a second, separate drafting device coming fiber sliver can be used.

Während der Übergabe auf die rotierende Seele werden die Fasern auf der Faserhaltefläche mit einer geeigneten Kraft zurückgehalten, die die Übergabe nicht verhindert, jedoch die gewünschte Spannung der Fasern erzeugt. Die Kraft zum Halten der Fasern auf der Faserhaltefläche kann zweckmässig so erzeugt werden, dass eine luftdurchlässige Faserhaltefläche verwendet wird und auf deren Rückseite ein Unterdruck aufrechterhalten wird. Selbstverständlich könnten aber stattdessen auch andere Kräfte angewendet werden, beispielsweise elektrostatische Anziehungskräfte.During the transfer to the rotating core, the fibers are retained on the fiber holding surface with a suitable force that does not prevent the transfer, but creates the desired tension of the fibers. The force for holding the fibers on the fiber holding surface can expediently be generated in such a way that an air-permeable fiber holding surface is used and a negative pressure is maintained on the rear side thereof. Of course, other forces could also be used instead, for example electrostatic attractive forces.

Eine Vorrichtung zur Durchführung des erfindungsgemässen Verfahrens, die einen Drallgeber, eine Liefereinrichtung für die Zufuhr einer Seele zu dem Drallgeber, welche Liefereinrichtung ein Streckwerk für eine Faserlunte enthält, eine bewegliche, die Seele berührende Faserhaltefläche und ein zweites Streckwerk für die Zufuhr von orientierten, parallelisierten Fasern zu der Faserhaltefläche an einer in deren Bewegungsrichtung vor der Berührungsstelle mit der Seele liegenden Stelle aufweist, ist erfindungsgemäss dadurch gekennzeichnet, dass die Faserhaltefläche vom Drallgeber gesondert ist und unabhängig von demselben bewegbar ist und die Berührungsstelle der Faserhaltefläche mit der Seele in der Bewegungsrichtung der letzteren vor dem Drallgeber liegt, dass an der Berührungsstelle zwischen Faserhaltefläche und Seele die Bewegungsrichtung der Faserhaltefläche mit der axialen Bewegungsrichtung der Seele einen spitzen Winkel von höchstens 60° bildet und dass die Walzen des zweiten Streckwerks auf den gleichen Achsen liegen wie die Walzen des erstgenannten Streckwerks.A device for carrying out the method according to the invention, which parallelized a swirl sensor, a delivery device for feeding a core to the swirl sensor, which delivery device contains a drafting device for a fiber sliver, a movable fiber-holding surface touching the core and a second drafting device for the supply of oriented According to the invention, fibers to the fiber holding surface at a point lying in the direction of movement thereof in front of the point of contact with the core are characterized in that the fiber holding surface is separate from the swirl sensor and can be moved independently of it and the point of contact of the fiber holding surface with the core in the direction of movement of the latter in front of the swirl device lies that at the point of contact between the fiber holding surface and the core, the direction of movement of the fiber holding surface forms an acute angle of at most 60 ° with the axial direction of movement of the core and that the rollers of the second drafting device ks lie on the same axes as the rollers of the former drafting system.

Ausführungsbeispiele des erfindungsgemässen Verfahrens und der erfindungsgemässen Vorrichtung werden nachstehend anhand der Zeichnungen näher erläutert. In diesen zeigen:

  • Fig. 1 schematisch in Draufsicht eine Vorrichtung zum Herstellen eines Umwindegarnes;
  • Fig. 2 in teilweise geschnittener schematischer Ansicht Einzelheiten eines in der Vorrichtung von Fig. 1 verwendbaren Faserzufuhrorganes, und
  • Fig. 3 in einer ähnlichen Ansicht wie Fig. 1 eine andere Ausführungsform einer Vorrichtung zum Herstellen eines Umwindegarnes.
Exemplary embodiments of the method according to the invention and the device according to the invention are explained in more detail below with reference to the drawings. In these show:
  • Fig. 1 shows schematically in plan view a device for producing a winding yarn;
  • Fig. 2 in a partially sectioned schematic view details of a usable in the device of Fig. 1 fiber feed member, and
  • Fig. 3 in a view similar to Fig. 1 shows another embodiment of a device for producing a wrapping yarn.

Die in den Fig. 1 und 3 dargestellten Vorrichtungen enthalten zunächst jeweils eine Liefereinrichtung für eine Fadenseele 1, welche Liefereinrichtung die Form eines Streckwerks 2 für eine Faserlunte 3 (oder gegebenenfalls auch zwei oder drei Faserlunten) hat. Die Seele 1 kann gewünschtenfalls zusätzlich zu der Faserlunte 3 auch noch einen fertigen Kernfaden, vorzugsweise ein Endlosfilament, enthalten.The devices shown in FIGS. 1 and 3 each contain a delivery device for a thread core 1, which delivery device has the form of a drafting device 2 for a fiber sliver 3 (or possibly also two or three fiber slabs). If desired, the core 1 can also contain a finished core thread, preferably an endless filament, in addition to the fiber sliver 3.

In den Vorrichtungen gemäss Fig. 1 oder Fig. 3 läuft die von dem Streckwerk 2 abgegebene Seele 1 zu einem Drallgeber 4 bzw. 4', der im dargestellten Beispiel jeweils aus zwei einander gegenüberstehenden, annähernd parallelen Scheiben 5, 6 bzw. 5', 6' besteht, welche in entgegengesetzten Richtungen umlaufen und an einer Umfangsstelle a den Faden berühren und in Drehung versetzen. Vorzugsweise sind die Achsen 5a und 6a der beiden Reibscheiben senkrecht zur Achse des Fadens (senkrecht zur Zeichenebene) gegeneinander versetzt, so dass sie an der Berührungsstelle a auch eine Kraft in Förderrichtung auf den Faden ausüben. In Fig. 1 sind die beiden Reibscheiben 5 und 6 praktisch starre Scheiben, die an ihren einander zugekehrten Seiten Reibbeläge aus beispielsweise Polyurethankunststoff tragen können (nicht dargestellt). Demgegenüber ist in Fig. 3 die Scheibe 5' eine nachgiebige, biegsame Scheibe, die z.B. aus Polyurethankunststoff besteht und die im Bereich der Fadenberührungsstelle a durch eine oder mehrere federbelastete Rollen 15 mit einstellbarer Kraft gegen die andere Reibscheibe 6 gedrückt ist.In the devices according to FIG. 1 or 3, the core 1 delivered by the drafting unit 2 runs to a swirl generator 4 or 4 ', which in the example shown consists of two mutually opposite, approximately parallel discs 5, 6 and 5', 6 ', which rotate in opposite directions and touch the thread at a circumferential point a and set it in rotation. The axes 5a and 6a of the two friction disks are preferably offset from one another perpendicular to the axis of the thread (perpendicular to the plane of the drawing), so that they also exert a force in the conveying direction on the thread at the contact point a. In Fig. 1, the two friction disks 5 and 6 are practically rigid disks that can carry friction linings made of, for example, polyurethane plastic on their mutually facing sides (not shown). In contrast, in Fig. 3 the disc 5 'is a resilient, flexible disc which e.g. consists of polyurethane plastic and which is pressed in the area of the thread contact point a by one or more spring-loaded rollers 15 with adjustable force against the other friction disc 6.

Anstelle der Reibscheiben 5, 6 könnte jedoch auch irgend ein anderer Drallgeber verwendet werden. Drallgeber sind in den verschiedensten Formen bekannt.Instead of the friction disks 5, 6, however, any other swirl generator could also be used. Swirlers are known in various forms.

An einer Stelle C, die in einem Abstand vor dem Drallgeber 4 bzw. 4' liegt, werden der sich frei axial bewegenden und rotierenden Seele 1 orientierte, parallelisierte Fasern F zugeführt, die, während sie mit der Seele in Berührung kommen und von dieser erfasst werden, zurückgehalten werden, so dass sie von der rotierenden Seele gespannt aufgewickelt werden. Die Faserzufuhr erfolgt mittels eines umlaufenden Zufuhrorgans, das als mit einer Welle 7 drehbare Hohlscheibe 8 bzw. 8' dargestellt ist. Die Hohlscheibe 8 in Fig. 1 besitzt eine ringförmige, konische, zur Welle 7 koaxiale Faserhalte-Oberfläche 9, und sie ist so angeordnet und geneigt, dass die Umfangsfläche der Seele 1 an der Stelle C diese Faserhalte-Oberfläche 9 tangiert. Vorzugsweise ist die Faserhalte-Oberfläche 9 luftdurchlässig, z. B. perforiert, und wird im Inneren der Hohlscheibe 8, auf der Rückseite der Oberfläche 9, ein Unterdruck aufrechterhalten, der die Fasern F auf der Oberfläche 9 festhält, bis sie von der rotierenden Seele 1 erfasst und aufgewickelt werden.At a point C, which is at a distance in front of the swirl generator 4 or 4 ', the freely axially moving and rotating core 1 oriented, parallelized fibers F are fed which, while they come into contact with the core and are captured by it are held back so that they are wound up by the rotating soul. The fibers are fed in by means of a rotating feed element, which is shown as a hollow disk 8 or 8 ′ which can be rotated with a shaft 7. The hollow disk 8 in FIG. 1 has an annular, conical fiber holding surface 9 coaxial with the shaft 7, and it is arranged and inclined so that the peripheral surface of the core 1 at point C touches this fiber holding surface 9. Preferably, the fiber holding surface 9 is air permeable, e.g. B. perforated, and a negative pressure is maintained inside the hollow disc 8, on the back of the surface 9, which holds the fibers F on the surface 9 until they are caught and wound up by the rotating core 1.

Gemäss Fig. 2 kann die Welle 7 der Hohlscheibe 8 in einem rückseitigen Abschlusskörper 17 gelagert sein, der an einem feststehenden Träger 18 angebracht ist. In den das Wellenlager 16 umgebenden Hohlraum 19 zwischen dem Abschlusskörper 17 und der Scheibe 8 mündet ein Luftabsaugschlauch 20, der an eine Unterdruckquelle (nicht dargestellt) angeschlossen ist, welche auf der Rückseite der perforierten Faserhalte-Oberfläche 9 einen Unterdruck aufrechterhält. Während an der Stelle, wo die Fasern F auf die Faserhalte-Oberfläche 9 übernommen werden, ein hoher Unterdruck erwünscht ist, kann es wünschbar sein, an der Faserübergabestelle C den Unterdruck in der Hohlscheibe 8 zu reduzieren. Zu dem Zweck kann der Abschlusskörper 17 eine Oberfläche aufweisen, die im Bereich der Faserübergabestelle C einen kleineren Abstand von der Rückseite der perforierten Faserhalte-Oberfläche 9 hat als in anderen Bereichen. Eine solche Oberfläche des Abschlusskörpers 17 kann auch wie bei 21 gezeigt derart geneigt angeordnet sein, dass sich durch Verdrehen des Abschlusskörpers 17 um die Achse der Welle 7 an einer gegebenen Stelle des Umfanges der Abstand zwischen der Oberfläche 21 und der Rückseite der Faserhalte-Oberfläche 9 - und damit die Stärke der Saugwirkung auf der betreffenden Stelle der Oberfläche 9 - ändern lässt. Um das Verdrehen des Abschlusskörpers 17 zu ermöglichen, ist dieser am Träger 18 mit einer Schraube 22 befestigt, deren Kopf in einer bogenförmig um die Achse des Wellenlagers 16 gekrümmten Nut 23 im Abschlusskörper liegt.2, the shaft 7 of the hollow disk 8 can be mounted in a rear end body 17 which is attached to a fixed support 18. An air outlet opens into the cavity 19 surrounding the shaft bearing 16 between the closing body 17 and the disk 8 Suction hose 20, which is connected to a vacuum source (not shown), which maintains a vacuum on the back of the perforated fiber holding surface 9. While a high negative pressure is desired at the point where the fibers F are transferred to the fiber holding surface 9, it may be desirable to reduce the negative pressure in the hollow disc 8 at the fiber transfer point C. For this purpose, the end body 17 can have a surface which has a smaller distance in the area of the fiber transfer point C from the rear side of the perforated fiber holding surface 9 than in other areas. Such a surface of the end body 17 can also be arranged inclined, as shown at 21, such that by rotating the end body 17 about the axis of the shaft 7 at a given point on the circumference, the distance between the surface 21 and the back of the fiber holding surface 9 - and thus the strength of the suction effect on the relevant area of the surface 9 - can be changed. In order to enable the end body 17 to be rotated, it is fastened to the carrier 18 with a screw 22, the head of which lies in a groove 23 in the end body that is curved in an arc around the axis of the shaft bearing 16.

Eine ähnliche Konstruktion kann auch die Hohlscheibe 8' in Fig. 3 aufweisen. Diese besitzt ebenfalls eine ringförmige Faserhalte-Oberfläche 9', die jedoch zylindrisch ist und auf dem Umfang der Scheibe 8' liegt. Auch die Faserhalte-Oberfläche 9' tangiert an der Stelle C die Umfangsfläche der Seele 1.The hollow disk 8 'in FIG. 3 can also have a similar construction. This also has an annular fiber holding surface 9 ', which, however, is cylindrical and lies on the circumference of the disk 8'. The fiber holding surface 9 ′ also affects the peripheral surface of the core 1 at point C.

An der Berührungsstelle C bildet die Bewegungsrichtung R der Oberfläche 9 (Fig. 1) mit der axialen Bewegungsrichtung der Seele 1 einen spitzen Winkel a, z. B. etwa 45° bzw. zwischen 30° und 60°. In Fig. 3 kann der Winkel zwischen der Bewegungsrichtung der Oberfläche 9' und der axialen Bewegungsrichtung der Seele 1 noch wesentlich kleiner sein und beispielsweise zwischen 5 und 10° liegen.At the point of contact C, the direction of movement R of the surface 9 (FIG. 1) forms an acute angle a, z. B. about 45 ° or between 30 ° and 60 °. In Fig. 3, the angle between the direction of movement of the surface 9 'and the axial direction of movement of the core 1 can be even smaller and for example between 5 and 10 °.

Die Bewegungsgeschwindigkeit der Oberfläche 9 bzw. 9' soll etwas kleiner sein als die Umfangsgeschwindigkeit der rotierenden Seele 1 an der Berührungsstelle C, z.B. etwa 10 bis 20% kleiner, damit die zugeführten Fasern F nicht auf die Seele geschoben werden, sondern durch diese von der Oberfläche 9 bzw. 9' abgezogen werden müssen.The speed of movement of the surface 9 or 9 'should be slightly lower than the peripheral speed of the rotating core 1 at the contact point C, e.g. about 10 to 20% smaller, so that the supplied fibers F are not pushed onto the core, but instead have to be pulled off from the surface 9 or 9 '.

Vorzugsweise wird die Seele 1 in solcher Richtung gedreht, dass ihre Umfangsgeschwindigkeit an der die Oberfläche 9 bzw. 9' berührenden Seite entgegengesetzt zu der zur Achse der Seele 1 senkrechten Komponente der Richtung R gerichtet ist. R ist die Bewegungsrichtung der Oberfläche 9 bzw. 9' an der Berührungsstelle C bzw. die Richtung der tangentialen Zufuhr der Fasern F zur Seele 1. In dieser Weise werden die zugeführten Fasern nicht zwischen der Seele 1 und der Oberfläche 9 geklemmt, sondern durch die rotierende Seele nach oben von der Oberfläche 9 bzw. 9' weggezogen. Gleichsinnige Drehung von Seele 1 und Oberfläche 9 bzw. 9' ist jedoch ebenfalls möglich.The core 1 is preferably rotated in such a direction that its peripheral speed on the side contacting the surface 9 or 9 ′ is opposite to the component of the direction R perpendicular to the axis of the core 1. R is the direction of movement of the surface 9 or 9 'at the contact point C or the direction of the tangential feed of the fibers F to the core 1. In this way, the fibers fed are not clamped between the core 1 and the surface 9, but by the rotating core pulled upwards away from the surface 9 or 9 '. However, rotation of core 1 and surface 9 or 9 'in the same direction is also possible.

Es kann vorkommen, dass sich die hinteren Enden von einzelnen zugeführten Fasern F, deren vordere Enden von der rotierenden Seele 1 erfasst worden sind, vorzeitig von der Faserhalte-Oberfiäche 9 bzw. 9' lösen. Um dafür zu sorgen, dass auch solche Fasern annähernd in der erwünschten Weise und Orientierung gestreckt auf die Seele 1 aufgewickelt werden, kann im Bereich der Faserübergabestelle C in einem kleinen Abstand (etwa 1 bis 2 mm) von der Faserhalte-Oberfläche 9 bzw. 9' ein Faserfangelement zum Aufhalten von solchen hinteren Faserenden angeordnet werden. Ein solches Faserfangelement ist in Fig. 3 als Bürste 25 dargestellt, die an einem Träger 26 befestigt ist. Wie durch Pfeile angedeutet, sind sowohl der Abstand der Bürste 25 von der Seele 1 bzw. von der Faserhalte-Oberfläche 9' als auch die Lage der Bürste längs der Seele 1 einstellbar, um eine optimale Anpassung an die Art (z.B. Länge) der verwendeten Fasern zu ermöglichen.It can happen that the rear ends of individual supplied fibers F, the front ends of which have been gripped by the rotating core 1, detach prematurely from the fiber holding surface 9 or 9 '. In order to ensure that such fibers are wound onto the core 1 in a stretched manner in the desired manner and orientation, a small distance (about 1 to 2 mm) from the fiber holding surface 9 or 9 can be in the area of the fiber transfer point C. 'A fiber trapping element for stopping such rear fiber ends can be arranged. Such a fiber catching element is shown in FIG. 3 as a brush 25 which is attached to a carrier 26. As indicated by arrows, both the distance of the brush 25 from the core 1 or from the fiber holding surface 9 'and the position of the brush along the core 1 can be adjusted in order to optimally adapt to the type (for example length) of those used Enable fibers.

Die orientierten, parallelisierten Fasern F, die auf der Oberfläche 9 bzw. 9' zur Seele 1 transportiert werden, werden dieser Oberfläche 9 bzw. 9' direkt aus einem Streckwerk 10 kommend zugeführt, das mit einer Faserlunte 11 gespeist wird. Auch diese Übergabe der Fasern F aus dem Streckwerk 10 auf die Oberfläche 9 bzw. 9' soll unter Spannung erfolgen, damit die Fasern gestreckt bleiben und ihre Orientierung nicht verlieren. Das heisst, die Fasern aus dem Streckwerk 10 sollen nicht auf die Oberfläche 9 bzw. 9' geschoben werden, sondern gestreckt durch diese abgezogen werden. Die Liefergeschwindigkeit des Streckwerks 10 soll also kleiner sein als die Bewegungsgeschwindigkeit der ringförmigen Oberfläche 9 bzw. 9', z.B. etwa 10 bis 20% kleiner.The oriented, parallelized fibers F, which are transported to the core 1 on the surface 9 or 9 ', are fed to this surface 9 or 9' directly from a drafting system 10 which is fed with a fiber sliver 11. This transfer of the fibers F from the drafting system 10 to the surface 9 or 9 'should also take place under tension so that the fibers remain stretched and do not lose their orientation. This means that the fibers from the drafting system 10 should not be pushed onto the surface 9 or 9 ', but should be drawn off stretched through the latter. The delivery speed of the drafting system 10 should therefore be lower than the speed of movement of the annular surface 9 or 9 ', e.g. about 10 to 20% smaller.

Dank der beschriebenen Formen und Anordnungen der Faserhalte- und -transport-Oberflächen 9, 9' ist es möglich, die Streckwerke 2 und 10 parallel bzw. koaxial zueinander anzuordnen. Die einander entsprechenden Walzen oder Walzenabschnitte der beiden Streckwerke, mit denen die Seele 1 und die dieser zuzuführenden Fasern F je aus einer Faserlunte 3 bzw. 11 gleichzeitig erzeugt werden, können also wie dargestellt jeweils auf der gleichen Achse liegen, so dass für die beiden Streckwerke nur eine Antriebseinrichtung erforderlich ist. Die Faserlunten 3 und 11 werden in vorteilhafter Weise aus der gleichen Richtung kommend parallel zugeführt.Thanks to the described shapes and arrangements of the fiber holding and transport surfaces 9, 9 ', it is possible to arrange the drafting units 2 and 10 in parallel or coaxially with one another. The corresponding rollers or roller sections of the two drafting systems, with which the core 1 and the fibers F to be fed to it are produced simultaneously from a fiber sliver 3 or 11, can thus, as shown, each lie on the same axis, so that for the two drafting systems only one drive device is required. The fiber slivers 3 and 11 are advantageously fed in parallel coming from the same direction.

Die Seele 1 mit den darumgewickelten Fasern F läuft als Faden 12 durch den Drallgeber 4 bzw. 4' und zu einer Abzugseinrichtung 13. Diese kann in üblicher Weise aus einer angetriebenen Metallwalze und einer an diese angepressten Gummiwalze bestehen. Anschliessend kann der Faden 12 in konventioneller Weise aufgewickelt werden (nicht dargestellt).The core 1 with the fibers F wound around it runs as a thread 12 through the swirl sensor 4 or 4 'and to a take-off device 13. This can consist in the usual way of a driven metal roller and a rubber roller pressed against it. The thread 12 can then be wound up in a conventional manner (not shown).

Der der Seele 1 vom Drallgeber 4 bzw. 4' erteilte Drall löst sich wegen der auf die Seele gewickelten Fasern F zwischen dem Drallgeber und der Abzugseinrichtung 13 nur teilweise wieder auf. Man erhält daher in der beschriebenen Weise einen gesponnenen Faden 12 hoher Festigkeit, obwohl die Seele 1 als verstreckte Faserlunte zugeführt wird.The swirl given to the soul 1 by the swirl sensor 4 or 4 'only partially dissolves because of the fibers F wound on the soul between the swirl sensor and the trigger device 13. A spun thread 12 of high strength is therefore obtained in the manner described, although the soul 1 is fed as a stretched fiber sliver.

Wie schon erwähnt, kann man der Seele 1 zusätzlich noch einen Kernfaden einverleiben, vorzugsweise ein Endlosfilament hoher Zugfestigkeit. Dank der ebenfalls in der Seele zugeführten verstreckten Faserlunte besteht dabei trotz der glatten Oberfläche des Endlosfilaments nur eine geringe Gefahr, dass sich die aufgewickelten Fasern F im fertigen Faden 12 axial verschieben. In den beschriebenen Beispielen werden Hüllfasern F mittels nur eines Faserzufuhrorgans 8 oder 8' an einer Stelle C auf die Seele 1 aufgebracht; selbstverständlich könnte man aber auch zwei oder mehr gleichartige umlaufende Zufuhrorgane verwenden, um orientierte, parallelisierte Fasern an mehreren Stellen nacheinander der laufenden Seele zuzuführen. Dabei könnten auch Fasern verschiedener Arten zugeführt werden.As already mentioned, core 1 can also be incorporated into core 1, preferably an endless filament with high tensile strength. Thanks to the drawn fiber sliver, which is also fed into the core, there is only a slight risk, despite the smooth surface of the continuous filament, that the wound fibers F move axially in the finished thread 12. In the examples described, enveloping fibers F are applied to the core 1 at only one point C by means of only one fiber feed element 8 or 8 '; Of course, one could also use two or more similar rotating feeders to feed oriented, parallelized fibers to the running core at several points in succession. Fibers of various types could also be added.

Claims (17)

1. Method for manufacturing a cored yarn, in which a twist is imparted to an axially moved core thread (1) by means of a twister (4; 4') and fibers (F) are fed to the rotating core thread (1) on a moving fiber retention surface (9; 9') in contact with the core thread, said fibers wrapping themselves around the core thread, the fibers (F) being fed to the fiber retention surface (9; 9') at a point lying in its direction of movement before the point of contact (C) with the core thread (1), as a first drawn fiber slubbing, in an oriented and parallelized state, and at least a second drawn fiber slubbing exiting directly from drawing rollers (2) being used as the core thread (1), characterized in that the fibers (F) held on the fiber retention surface (9; 9') are fed to the core thread (1) in its axial direction of movement before the twister (4; 4') in a direction (R) which forms an acute angle (a) of at most 60° with the axial direction of movement of the core thread (1), the fibers (F) wrapping themselves around the core thread (1) being restrained by the fiber retention surface (9; 9'), and in that the first drawn fiber slubbing is fed exiting directly from second drawing rollers (10) having the rollers on the same axes as the rollers of the first-named drawing rollers (2).
2. Method according to claim 1, characterized in that the fiber retention surface (9; 9') is moved at a speed less than the circumferential speed of the rotating core thread (1) at the point of contact (C) with the fiber retention surface.
3. Method according to claim 1 or 2, characterized in that a core filament, preferably a continuous filament, is used in the core thread (1) in addition to the second fiber slubbing.
4. Method according to any one of claims 1 to 3, characterized in that the rate of feed of the drawing rollers (2 and 10) is less than the speed of movement of the fiber retention surface (9; 9').
5. Method according to any one of claims 1 to 4, characterized in that an air-permeable fiber retention surface (9; 9') is used and a vacuum is maintained at its rear side for holding the fibers (F) to the fiber retention surface.
6. Method according to any one of claims 1 to 5, characterized in that the fiber retention surface (9; 9') is moved in such a way that at the point of contact (C) of the fiber retention surface with the core thread (1), the moving component of the fiber retention surface in the circumferential direction of the core thread is directed opposite to the circumferential speed of the core thread (1).
7. Device for carrying out the process according to any one of claims 1 to 6, including a twister (4; 4'), a feed mechanism (2) for feeding a core thread (1) to the twister, said feed mechanism (2) including drawing rollers for a fiber slubbing, a movable fiber retention surface (9; 9') which comes in contact with the core thread, and second drawing rollers (10) for feeding oriented, parallelized fibers (F) to the fiber retention surface (9; 9') at a point lying in its direction of movement before the point of contact (C) with the core thread (1), characterized in that the fiber retention surface (9; 9') is separate from the twister (4; 4') and is movable independently thereof and the point of contact (C) of the fiber retention surface (9; 9') with the core thread (1) lies in the direction of movement of the latter ahead of the twister (4; 4'), in that at the point of contact (C) between the fiber retention surface (9; 9') and the core thread (1) the direction of movement of the fiber retention surface (9; 9') forms an acute angle (a) of at most 60° with the axial direction of movement of the core thread (1), and in that the rollers of the second drawing rollers (10) lie on the same axes as the rollers of the first-named drawing rollers (2).
8. Device according to claim 7, characterized in that a fiber pickup element (25), e.g. a brush, is placed in the area of the contact point (C) between the fiber retention surface (9; 9') and the core thread (1) at a distance from the fiber retention surface, to restrain the rear ends of fibers released from the fiber retention surface, whose forward ends have been picked up by the core thread.
9. Device according to claim 7 or 8, characterized in that the fiber retention surface (9; 9') lies on a body (8; 8') rotatable about an axis (7) and extends annularly about its axis of rotation (7).
10. Device according to claim 9, characterized in that the fiber retention surface (9) extends conically around the axis of rotation (7).
11. Device according to claim 9, characterized in that the fiber retention surface (9') extends cylindrically around the axis of rotation.
12. Device according to any one of claims 7 to 11, characterized in that the fiber retention surface (9; 9') is air-permeable and means (17, 19, 20) are provided for producing a vacuum on the rear side of the fiber retention surface (9; 9') to hold the fibers (F) to the fiber retention surface (9; 9').
13. Device according to claim 12, characterized in that on the rear side of the fiber retention surface (9; 9') there is disposed an adjustment element (17) which can be adjusted so as to change, adjacent to the point of contact (C) between the fiber retention surface and the core thread (1), the distance between the rear side of the fiber retention surface and the adjustment element and thereby the suction effect on the fiber retention surface.
14. Device according to claims 9 and 13, characterized in that the adjustment element (17) is pivotable about the axis of rotation (7) of the said body (8; 8').
15. Device according to any one of claims 7 to 14, characterized in that the twister (4; 4') comprises two opposite, counterrotating friction disks (5, 6; 5', 6').
16. Device according to claim 15, characterized in that the axes (5a, 6a) of the friction disks (5, 6; 5', 6') are displaced with respect to each other in a direction perpendicular to the axial direction of movement of the core thread (1).
17. Device according to claim 15 or 16, characterized in that one of the friction disks (5') is made to be flexible and is pressed against the other friction disk (6) by pressure rollers (15).
EP84810240A 1983-05-18 1984-05-15 Method and device for manufacturing a cored yarn Expired EP0128863B1 (en)

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AT84810240T ATE27621T1 (en) 1983-05-18 1984-05-15 METHOD AND DEVICE FOR MANUFACTURING A COVERED YARN.

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CH2697/83 1983-05-18
CH269783 1983-05-18

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ATA169077A (en) * 1976-03-27 1990-09-15 Schlafhorst & Co W METHOD FOR SPINNING FIBERS TO A FIBER COMPOSITE
AT345701B (en) * 1977-04-27 1978-10-10 Fehrer Ernst DEVICE FOR SPINNING TEXTILE FIBERS
CS196916B1 (en) * 1977-12-29 1980-04-30 Stanislav Didek Frictional yarn spinning apparatus
AT361814B (en) * 1978-05-12 1981-04-10 Fehrer Ernst DEVICE FOR PRODUCING A YARN
DE2909615C2 (en) * 1978-05-26 1982-03-18 Ernst Dr. 4020 Linz Fehrer Apparatus for producing a yarn
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AT354906B (en) * 1978-08-16 1980-02-11 Fehrer Ernst DEVICE FOR PRODUCING A YARN
CH615554B (en) * 1978-09-05 Heberlein Hispano Sa METHOD OF MANUFACTURING A CORE COAT YARN
DE3023936A1 (en) * 1979-07-27 1981-02-19 Ernst Dr Fehrer DEVICE FOR PRODUCING A YARN
DE3047987C2 (en) * 1980-01-28 1986-01-23 Ernst Dr. Linz Fehrer Apparatus for producing a yarn
US4489540A (en) * 1982-01-26 1984-12-25 Asa S.A. Process and device for obtaining a spun yarn of fibres comprising an internal core and novel types of spun yarns thus made
FR2529234A1 (en) * 1982-06-29 1983-12-30 Asa Sa METHOD AND DEVICE FOR PRODUCING FIBER YARNS COMPRISING A SOUL

Also Published As

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AU566834B2 (en) 1987-10-29
JPS59223324A (en) 1984-12-15
AU2861884A (en) 1984-12-04
SU1314957A3 (en) 1987-05-30
DD218401A5 (en) 1985-02-06
DE3464067D1 (en) 1987-07-09
US4583355A (en) 1986-04-22
WO1984004550A1 (en) 1984-11-22
ES532636A0 (en) 1985-04-01
ES8504280A1 (en) 1985-04-01
EP0128863A1 (en) 1984-12-19
CZ376684A3 (en) 1993-04-14
CH664773A5 (en) 1988-03-31
ATE27621T1 (en) 1987-06-15
CA1226182A (en) 1987-09-01

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