EP3066241A1 - Banc d'étirage pourvu d'un élément de pression - Google Patents

Banc d'étirage pourvu d'un élément de pression

Info

Publication number
EP3066241A1
EP3066241A1 EP14798938.8A EP14798938A EP3066241A1 EP 3066241 A1 EP3066241 A1 EP 3066241A1 EP 14798938 A EP14798938 A EP 14798938A EP 3066241 A1 EP3066241 A1 EP 3066241A1
Authority
EP
European Patent Office
Prior art keywords
fiber
zone
fiber guide
pressure
roller pair
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14798938.8A
Other languages
German (de)
English (en)
Inventor
Ludek Malina
Gabriel Schneider
Radek Zarecky
Petr Blazek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP3066241A1 publication Critical patent/EP3066241A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/86—Aprons; Apron supports; Apron tensioning arrangements
    • D01H5/88—Cradles; Tensors

Definitions

  • the invention relates to a drafting system for processing at least one fiber structure according to the preamble of claim 1.
  • Most drafting systems of this type have a driven and fixedly mounted inlet lower roller and a driven and stationary mounted lower roller outlet.
  • the infeed bottom roll is associated with a movable and loaded infeed top roll so that an incoming fiber strand is clamped between the infeed top roll and the infeed bottom roll.
  • the fiber structure as well as the inlet top roll are taken by frictional engagement of the inlet bottom roll.
  • the outlet bottom roller is associated with a movable and loaded outlet top roller, so that the leaking fiber structure between the outlet top roller and the outlet bottom roller is also clamped.
  • the fiber structure and the outlet top roller are also taken here by frictional engagement of the outlet bottom roller.
  • the distortion of the fiber strand is caused by the spout bottom roller rotating at a substantially higher peripheral speed than the spool bottom so that the fibers of the fiber strand are pulled apart in the drafting zone in the conveying direction.
  • a fiber guide device is arranged in the drafting zone of the drafting system (as for example in DE 102005056534 A1).
  • the fiber guiding device shown in DE 102005056534 A1 consists of a top apron and a bottom apron, wherein the fiber structure is guided between the top apron and the bottom apron.
  • the Unterriemchen runs on the underside of the drafting around the inlet sub-roller and a stationary bridge, and is driven by frictional engagement of the inlet lower roller.
  • the top apron goes around the infeed top roll and a stationary deflector, and communicates with the bottom apron via frictional engagement.
  • the deflecting element is designed in the form of a cage and arranged rigidly in the drafting zone.
  • a pressure element in the form of a rigid plate is arranged between the deflecting element and the upper apron. The pressure element rests with its own weight on the inner surface of the upper apron and presses the upper apron over a portion of the fiber guide device against the surrounding around the bridge Unterriemchen.
  • the guided between the two straps fiber bundle learns through this portion of the fiber guide device ideally a uniform contact pressure on the Unterriemchen.
  • the pressure element is acted upon by an attached to the deflecting coil spring with an additional spring force.
  • the fiber structure to be distorted does not experience a uniform contact pressure on the lower apron over the portion of the fiber guiding device in which the pressure element rests on the upper apron.
  • the contact pressure concentrates on one or more contact points or
  • a significant reason for the uneven contact pressure is the fact that the fiber structure varies over its length in diameter, ie seen over its length alternately has thick and thin areas. Depending on the type of spring, the fiber structure is therefore clamped either at a thick place or at a thin place.
  • the fiber structure undergoes the entire contact force at a thick spot. As a result, the fiber structure is clamped at the thick point between the two straps, whereas the thinner part of the fiber structure undergoes no clamping. If the fiber structure moves with the thick point in the course of the delay, the nip shifts along the fiber guide. approximately facility.
  • the pressure element when using a rather soft spring, which responds more strongly to a change in the diameter of the fiber structure, the pressure element is briefly raised by a thick spot in the fiber structure and tilts in the direction of the thinner part of the fiber structure. This results in a displacement of the nip in the direction of the thin point of the fiber structure. Due to the alternating occurring thick and thin areas in the fiber structure, the pressure element is therefore subjected during the delay of a constant tilting movement. This means that even with a rather soft spring, the nip within the fiber guide device is undefined. By means of the described fiber guiding device, it is thus impossible to sufficiently control the clamping of the fiber structure in the fiber guiding device. This has a negative effect on the quality of the distortion of the fiber structure.
  • the object of the invention is thus to improve the fiber guiding device such that the clamping of the fiber structure to be distorted in the fiber guiding device takes place in a controlled manner, that is, the fiber guiding device should have a firmly defined clamping point at which the fiber structure experiences a uniform contact force.
  • a fiber structure is understood to mean an elongate structure made of individual fibers whose length is substantially less than the length of the structure.
  • the fiber structure may in particular be a substantially rotation-free fiber sliver produced on a carding machine, combing machine or track, which is processed on a flyer equipped with a drafting device to form a roving provided with a protective rotation.
  • the fiber structure may be a roving provided with a protective rotation, which is processed on a spinning machine equipped with a drafting device, for example on a ring spinning machine, into a finished twisted yarn.
  • the drafting device according to the invention is suitable both for spin preparation machines, such as flyers or stretchers, and for spinning machines, such as ring spinning machines. suitable, in particular if they have a variety of jobs, where each a roving or a yarn is produced. It is also conceivable that the drafting at a job multiple fiber composites are supplied, which are warped together.
  • a delay zone is understood to be the region between the clamping lines of two adjacent pairs of rollers, in which a fiber structure is warped.
  • a lower roller is a stationary mounted roller and a top roller a movably mounted and pressed against a lower roller roller.
  • upper rollers are arranged above their associated lower roller.
  • drafting systems are also conceivable in which the fiber structure runs essentially vertically, in which case the top roller and the bottom roller of a roller pair can be arranged next to one another.
  • a Faser Elimchen is an endless structure which rotates about a deflection element so that it is seen in the direction of the fiber structure at least over a substantial part of the draft zone and thereby moves corresponding to the fiber structure.
  • the pressure element has a, under spring force pressure arm (16) which is attached with a first end on the deflecting element and with a second free end under the action of the spring force over a, extending over the width of the Faser Equipmentsriemchen Support surface rests linearly on the inner surface of the Faser Equipmentsriemchen.
  • the bearing surface of the pressure arm has a length between 1 and 4 mm.
  • this length can be between 1 and 3 mm.
  • the pressure element is designed as an elastic spring element.
  • the spring element in this case has a pressure arm, via which it exerts an approximately linear pressure on the inner surface of the Faser arrangementsriemchens.
  • the second free end of the pressure arm In the operating position, the second free end of the pressure arm is deflected by the fiber guide element from its rest position. Due to the spring characteristic of the elastic spring element, or of the spring arm under pressure, the second free end experiences a restoring force in the direction of its rest position. As a result, the Faser arrangementsriemchen is pressed with a contact force against the fiber guide element.
  • the fiber structure to be distorted is deformed by the pressure element, e.g. clamped in the form of an elastic spring element, or its under spring pressure arm at a well-defined location in the fiber guide device between the Faser arrangementsriemchen and the fiber guide element.
  • the elastic provided with a pressure arm spring element (pressure element) that the fiber structure at the nip experiences a constant contact force against the fiber guide element.
  • the contact force which is aligned transversely to the conveying direction of the fiber structure, is thereby generated in contrast to the prior art by the elastic spring action of the pressure arm of an inserted spring element itself.
  • the elastic spring element is preferably made of metal or plastic or a combination of metal and plastic.
  • metal this has particular brass and for plastic in particular Teflon proved to be advantageous because such materials are characterized by both good spring properties as well as good sliding properties.
  • the spring element is designed for the sake of simplicity as a leaf spring.
  • the leaf spring is U-shaped.
  • U-shaped is to be understood that the leaf spring is bent and composed of two legs, a first leg and a second leg. The two legs are arranged at a distance from one another and form an opening at their ends.
  • the leaf spring is fastened to the deflecting element via the first limb, wherein it rests with the free end of the second limb on the inner surface of the fiber guiding apron.
  • the free end of the second leg is deflected by the fiber guide element from its rest position in the direction of the first leg, so that the distance between the two legs is reduced and the opening is reduced. Due to its spring characteristic of the second leg undergoes a restoring force in the direction of its rest position by the deflection. As a result, the Faser Equipmentsriemchen is pressed with a contact force against the fiber guide element.
  • the expression “movable” can be understood to mean that the pressure arm is pivotably mounted on the deflecting element on the end connected to the deflecting element, on the other hand a design is conceivable, wherein one end of the pressure arm is fixedly attached to the deflecting element, while the free end is elastically movable within a certain range due to the elasticity of the pressure arm. It is particularly advantageous if the fiber guide element is stationary and has a concave fiber guide surface on which the fiber guide strap rests.
  • the concave fiber guide surface contributes to the setting during the delay, the firmly defined nip within the fiber guide device, in contrast to the prior art also eliminates the use of a further Faser Equipmentsriemchens at the bottom of the drafting system by the fixed fiber guide element, whereby the maintenance of the spinning machine is significantly reduced.
  • the fiber guiding device viewed in the conveying direction of the fiber structure, is composed of an inlet zone, a clamping zone and an outlet zone.
  • the inlet zone is designed wedge-shaped, that the distance between the Faser Assemblysriemchen and the fiber guide surface decreases to the clamping zone.
  • the fiber structure is introduced into the fiber guiding device without detaching fibers.
  • the fiber guiding apron runs parallel to the fiber guiding surface, i.e. the fiber guiding apron follows the contour of the fiber guiding surface.
  • the fiber guide surface of the fiber guide element In the subsequent outlet zone of the fiber strand is guided by the fiber guide surface of the fiber guide element on one side, without clamping action in the direction of a clamping point of the outlet roller pair.
  • the end of the fiber guide surface lies above a straight connecting line which runs through the clamping point of the outlet roller pair and the contact point of the spring element on the Faser Elimchen.
  • both the inlet zone and the clamping zone has a length of 2 to 15 mm. Due to the geometric configuration of the inlet zone, it is possible to introduce the fiber structure without detachment of fibers from a terminal point of the inlet roller pair in the fiber guide device. By the geometric configuration of the clamping zone, however, it is ensured that the fiber structure in the fiber guiding device experiences sufficient guidance, which the Quality of the warped fiber structure in particular with regard to its uniformity and strength comes to good.
  • the elastic spring element rests with its free end, in the region of the clamping zone on the inner surface of the Faser arrangementsriemchens, so that the nip forms within the clamping zone. It has proven to be advantageous if the clamping point is located in the front region of the clamping zone. As a result, the Faser Equipmentsriemchen undergoes strong contact force in the front region of the clamping zone, wherein it rests gently on the fiber guide surface in the rear region of the clamping zone.
  • the end of the clamping zone is arranged at a distance of 8 to 15 mm from the clamping point of the outlet roller pair.
  • the end of the clamping zone is the point at which the clamping zone merges into the outlet zone and the Faser Operationssriemchen no longer rests on the fiber guide surface or the fiber structure is no longer guided between the Faser Operationssriemchen and the fiber guide surface. Due to the distance between the end of the clamping zone and the clamping point of the outlet roller pair ensures that the fiber structure in the drafting zone experiences sufficient guidance.
  • the pressure element - seen in the conveying direction of the fiber strand - is adjustably attached to the deflecting element.
  • This makes it possible to adapt the contact force of the spring element to the distorted in the drafting fiber structure so that fiber composites of different characteristics can be warped with consistent quality in the drafting system.
  • the contact pressure at the nip lies in a range between 0.5-5N.
  • the adjustment of the spring element can be done either continuously or discontinuously.
  • the spring element z. B. adjustable via an adjusting screw, a thumbwheel or a guide on the deflection.
  • the discontinuous adjustment of the spring element is z. B.
  • the deflecting element for receiving the spring element a Bolt and the spring element has juxtaposed holes, wherein the spring element is attached via one of the bores on the bolt of the deflecting element.
  • the outlet zone has a length of 1-4 mm.
  • the fiber structure is sufficiently guided to the terminal point of the outlet roller pair, which has a positive effect on the quality of the warped fiber structure.
  • the fiber guide surface made of metal or plastic or a combination of metal and plastic.
  • brass and plastic in particular Teflon, have proved to be advantageous for metal since such materials are characterized by good sliding properties.
  • the fiber guide surface has a friction-reducing coating. By such a coating, the resulting friction between the Faser Operationssriemchen and the fiber guide surface is reduced, which reduces the energy consumption of the spinning machine and the wear, in particular the Faser Equipmentsriemchens.
  • the fiber guiding surface of the fiber guiding element it is also possible for the fiber guiding surface of the fiber guiding element to have a conductive coating, in particular of a metal.
  • the attachment of the fiber guide element on the carrier can be z. B via a screw or a form connection.
  • the fiber guide element is adjustably fixed to the carrier. This makes it possible, the length of the clamping zone and the outlet zone adapt exactly to the distorted in the drafting fiber structure, so that fiber composites of different characteristics can be warped with consistent quality in the drafting system.
  • FIG. 1 shows a schematic side view of a drafting system of a spinning machine with a conventional fiber guide device
  • FIG. 2 shows a schematic side view of an exemplary embodiment of a drafting system according to the invention of a spinning machine in which the fiber guiding apron is pressed against the fiber guiding element by a U-shaped spring element and
  • Figure 3 is an enlarged side view of the spring element shown in Figure 2 in the rest position and in the deflected position.
  • Figure 4 shows a further embodiment of an embodiment according to Figure 3 with a pressure arm designed according to the invention.
  • Figure 5 is an enlarged partial view of the pressure arm of the U-shaped spring element according to Fig.2
  • FIG. 6 shows a sectional view A-A according to FIG. 5
  • the spinning machine may in particular be a spinning preparation machine, for example a flyer or a track, or a spinning machine, for example a ring spinning machine.
  • the drafting system 1 is intended to an incoming fiber structure 2, for example a sliver or a roving to distort in a draft zone 3, so that a uniformly refined fiber structure 25 is formed.
  • the delay zone 3 is in this case between the clamping point 24 of an inlet-side pair of rollers 4 and the clamping point 21 of an outlet-side roller pair. 5
  • An inlet-side lower roller 7 is stored as well as an outlet-side lower roller 9 stationary and driven.
  • the inlet-side lower roller 7 is assigned a movable and loaded inlet-side upper roller 6, so that the incoming fiber structure 2 is clamped between the inlet side upper roller 6 and the inlet side lower roller 7, wherein the fiber structure 2 and the inlet side upper roller 6 are taken by means of frictional engagement.
  • the outgoing lower roller 9 is associated with a movable and loaded outlet side upper roller 8, so that the outgoing fiber structure 25 is clamped between the outlet side upper roller 8 and the outlet side roller 9, whereby here the fiber structure 25 and the outlet side upper roller 8 are taken by means of frictional engagement.
  • the delay of the fiber composite 2 is now effected by the outgoing lower roller 9 is driven at a significantly higher peripheral speed than the inlet side lower roller 7, so that the fibers in the drafting zone 3 moves relative to each other, that is in a conveying direction F of the fiber structure apart to be pulled.
  • a fiber guide device 10 is disposed in the draft zone 3 of the drafting system 1.
  • the fiber guiding device 10 comprises a fiber guiding element in the form of a lower apron 29, which is of endless design, and is guided on the inlet-side lower roller 7 and revolves around a stationary bridge 27.
  • the Unterriemchen 29 is driven by frictional engagement of the inlet lower roller 7.
  • the Oberriemchen 1 stands with the Unterriemchen 29 via friction in connection and is driven by the Unterriemchen 29.
  • the conversion Guide member 13 is in the form of a cage and is fixed to the fixed axis of the inlet top roller 6.
  • a pressure element 14a in the form of a rigid plate is arranged between the deflecting element 13 and the upper apron 11.
  • the pressure element 14a rests with its own weight on the inner surface 11a of the upper apron 11 and presses the upper apron 11 over a partial region of the fiber guiding device 10 against the lower apron 29 surrounding the bridge 27.
  • the fiber structure 2 guided between the two aprons 29,11 In order to reinforce the contact pressure AK of the fiber structure 2 to the Unterriemchen 29, the pressure element 14a is acted upon by an attached to the deflecting element 13 coil spring 26 with an additional spring force on this subregion of the fiber guide device 10 ideally a uniform contact force.
  • a major disadvantage of the drafting system 1 shown in Fig. 1 with the fiber guide device 0 is that the distorting fiber structure 2 over the portion of the fiber guide device 10 in which the pressure element in the form of a rigid plate 14a rests on the upper apron 11, no uniform contact pressure learns to the Unterriemchen 29.
  • the pressing force concentrates on one or more contact points or clamping points that adjust during the delay in this subregion of the fiber guiding device 10. The contact points or
  • Clamping points are the points at which the fiber structure 2 is clamped between the upper apron 11 and the lower apron 29 due to the pressing force of the rigid plate 14a.
  • Another disadvantage of the fiber guide device 10 is the fact that the contact point or nip shifts during the delay, so that sets within the fiber guide device 10 no firmly defined nip.
  • a significant reason for the non-uniform contact force is the fact that the fiber structure 2 varies over its length in diameter, ie seen over its length alternately has thick and thin areas. Depending on the nature of the spring 26, the fiber structure 2 is therefore either at a thick place or at a thinnest place. le clamped.
  • the fiber structure 2 experiences the entire contact force at a thick spot. As a result, the fiber structure 2 is clamped at the thick point between the two straps 11, 29, whereas the thinner part of the fiber structure 2 undergoes no clamping. Moves the fiber strand 2 with the thick point in the course of the delay, so the nip moves along the fiber guide device 10.
  • the rigid plate 14a Due to the irregularities in the diameter of the fiber structure 2, the rigid plate 14a is therefore due to a shift in the nip in the direction of the thin section of the fiber structure subjected during the delay of a constant tilting movement. This means that even with a rather soft spring 26, the nip within the fiber guide device 10 is not clearly defined. By means of the described fiber guiding device 10, it is therefore impossible to sufficiently control the clamping of the fiber structure 2 in the fiber guiding device 10. This has a negative effect on the quality of the distortion of the fiber structure 2.
  • FIG. 2 shows a schematic side view of an exemplary embodiment of a drafting system 1 according to the invention of a spinning machine, in which the fiber guiding device 10 comprises a fiber guiding apron 11 which revolves around the inlet-side top roller 6 and around a deflecting element 13.
  • the fiber guide strap
  • the fiber guide device 10 comprises a fiber guide element 2, which has a concave fiber guide surface 17 for guiding the fiber structure 2.
  • the fiber guiding element 12 is detachably fixed to a support 23 via a clamping connection, so that the fiber guiding element 12 can be attached and removed easily and quickly to the support 23. As a result, worn fiber guide elements
  • Carrier 23 extends over several jobs of the spinning machine, wherein on the carrier 23 per job, a fiber guide element 12 is attached.
  • a pressure element 4 is arranged, which is designed as an elastic spring element.
  • the elastic spring element 14 pressure element
  • the elastic spring element 14 is fastened with a first end 15 on the deflecting element 13 and lies with a second free end P linearly on the inner surface 11 a of the Faser arrangementsriemchens 11.
  • the second free end P is located on a pressure arm 16 of the spring element 14.
  • the second free end P is deflected by the fiber guide element 2 from its rest position RL ( Figure 3).
  • the second free end P experiences a restoring force RK (FIG. 3) in the direction of its rest position RL.
  • the Faser Equipmentsriemchen 11 is pressed against the fiber guide surface 17 with a contact force AK.
  • the fiber guiding device 10 is composed of an inlet zone 18, a clamping zone 19 and an outlet zone 20.
  • the inlet zone 8 is designed wedge-shaped, that the distance between the Faser Operationssriemchen 11 and the fiber guide surface 17 to the clamping zone 19 decreases.
  • the length of the inlet zone 18 is between 2-15mm.
  • the end of the fiber guiding surface 17 lies above a straight connecting line 28 (or a plane), which runs through the clamping point 21 of the outlet roller pair 5 and the clamping point 22.
  • the fiber structure 2 experiences at the end of the fiber guide device 10 a deflection, which has a positive effect on the quality of the delay. That is, the individual fibers are controlled by the deflection, which is equivalent to a push rod, out in the area between the deflection and the subsequent clamping point 21 of the output roller pair 5.
  • the length of the outlet zone 15 is between 1-4 mm.
  • FIG 3 shows a schematic side view of a spring element 14 fastened to a deflecting element 13 in the rest position RL and in the deflected position, wherein the spring element 14 is shown in a deflected position with a dashed line.
  • the spring element 14 is formed as a U-shaped leaf spring, which is composed of a first leg 15 and a second leg 16. The two
  • Legs 15,16 are arranged at a distance from one another and form at their ends an opening 30.
  • the leaf spring 14 is arranged at a distance from one another and form at their ends an opening 30.
  • the leaf spring 14 is arranged at a distance from one another and form at their ends an opening 30.
  • Screw connection 31 adjustably attached to the deflection element 13, wherein it rests with the free end P of the second leg 16 (pressure arm) on the inner surface 11a of the Faser Equipmentsriemchens (the Faser Equipmentsriemchen is not shown in Fig.3 provides).
  • the free end of the second leg 16 (pressure arm) by the fiber guide element deflected from its rest position RL in the direction of the first leg 15, so that the distance between the two legs 15th , 16 reduced and the opening 30 reduced.
  • the Faser arrangementsriemchen is pressed with a contact force against the fiber guide element.
  • the guided between the Faser arrangementsriemchen and the fiber guide element fiber strand is clamped.
  • the adjustable attachment of the leaf spring 14 (pressure element) on the underside of the deflecting element 13 it is also possible to adapt the clamping point and the contact force exactly to the distorted in the drafting fiber structure. In this way, fiber composites of different characteristics can be warped with consistent quality in the drafting system.
  • a device is shown deviating from the embodiment of Figure 3, wherein instead of a U-shaped leaf spring 14 (pressure element), a pressure arm 16 is fixed to the deflecting element 3.
  • the pressure arm 16 is pivotally mounted at its first end 15 about an axis 33, as indicated by a double arrow.
  • the pivot axis 33 is attached to an extension 34 which is adjustably mounted via a screw 31 on the deflecting element 13, as is also indicated schematically by a double arrow.
  • a compression spring Q is attached, the other end is in communication with the pressure arm 16 in the region of its second free end P.
  • the pressure arm 16 in the region of its first end 15 fixedly with the deflecting element 13.
  • the pressure arm is formed so that it can perform an elastic deflection, so that the free end P elastically in a certain range in the direction of the fiber guide element 12 (not shown in Figure 4) can move.
  • the free end E of the pressure arm 16 is dashed by the fiber guide element from its rest position RL in the direction of the deflecting element 13 in the shown deflected position.
  • the Faser arrangementsriemchen is pressed under the action of the spring Q with a contact force against the fiber guide element.
  • the free end P of the pressure arm 16 on a support surface AF on the inner surface 11a of the Faser exits- ferrule 11 and forms a defined and constant nip 22.
  • the pressure arm 16 extends almost over the entire width b of the belt 11 and exerts a pressure on the belt 11 on the fiber 2, which is guided on the fiber guide surface 17 of the fiber guide element 12 ,
  • the proposed design ensures constant and consistent clamping conditions in the main drafting zone, which are independent of mass fluctuations in the fiber material.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Abstract

L'invention concerne un banc d'étirage (1) permettant de traiter au moins un assemblage de fibres (2) sur au moins un poste de travail d'un métier à filer. Au moins une zone d'étirage (3), laquelle est formée entre une paire de cylindres d'alimentation (4) et une paire de cylindres de sortie (5), est présente pour chaque poste de travail. La paire de cylindres d'alimentation (4) et la paire de cylindres de sortie (5) se composent respectivement d'un cylindre inférieur (7, 9) et d'un cylindre supérieur (6, 8). Un dispositif de guidage de fibres (10), lequel comprend au moins une lanière rotative de guidage de fibres (11) coopérant avec un autre élément de guidage de fibres (12, 29) destiné à guider l'assemblage de fibres à étirer, est associé à la zone d'étirage (3). La ou les lanières de guidage de fibres (11) sont guidées sur le cylindre supérieur (6) de la paire de cylindres d'alimentation (4) et un élément de déviation (13), et un élément de pression (14, 14a), lequel exerce une force de pression sur la surface intérieure (IIa) de la lanière de guidage de fibres (11) dans une zone dans laquelle la lanière de guidage de fibres et l'autre élément de guidage de fibres (12, 29) sont tangents, est monté à l'intérieur d'une des lanières de guidage de fibres (11). L'invention vise à ce que le dispositif de guidage de fibres (10) présente un point de serrage clairement défini au niveau duquel l'assemblage ou les assemblages de fibres expérimentent une force de pression uniforme sur l'élément de guidage de fibre (12). a cet effet, l'élément de pression (14) comprend un bras de pression (16) sollicité par une force élastique, ledit bras étant monté par une première extrémité (15) sur l'élément de déviation (13) et reposant linéairement par une seconde extrémité (P), sous l'effet de la force élastique, sur la surface intérieure (IIa) de la lanière de guidage de fibre (11) par l'intermédiaire d'une surface d'appui (AF) s'étendant sur toute la largeur (b) de la lanière de guidage de fibres (11).
EP14798938.8A 2013-11-05 2014-10-27 Banc d'étirage pourvu d'un élément de pression Withdrawn EP3066241A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01854/13A CH708812A1 (de) 2013-11-05 2013-11-05 Streckwerk mit einem Druckelement.
PCT/IB2014/002227 WO2015068005A1 (fr) 2013-11-05 2014-10-27 Banc d'étirage pourvu d'un élément de pression

Publications (1)

Publication Number Publication Date
EP3066241A1 true EP3066241A1 (fr) 2016-09-14

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Application Number Title Priority Date Filing Date
EP14798938.8A Withdrawn EP3066241A1 (fr) 2013-11-05 2014-10-27 Banc d'étirage pourvu d'un élément de pression

Country Status (4)

Country Link
EP (1) EP3066241A1 (fr)
CN (1) CN105683429A (fr)
CH (1) CH708812A1 (fr)
WO (1) WO2015068005A1 (fr)

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CN211227482U (zh) * 2018-11-07 2020-08-11 徐时平 环锭纺细纱机的纤维须条输送机构
IT201900005608A1 (it) * 2019-04-11 2020-10-11 Marzoli Machines Textile Srl Pettinatrice di una linea di preparazione alla filatura
CN110965155B (zh) * 2019-10-01 2021-11-09 嘉兴学院 一种横动下肖的牵伸机构及细纱机
CN112760766A (zh) * 2021-02-09 2021-05-07 徐时平 环锭纺细纱机的纤维须条输送机构

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