EP0171731B1 - Dispositif de filature - Google Patents

Dispositif de filature Download PDF

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Publication number
EP0171731B1
EP0171731B1 EP19850109828 EP85109828A EP0171731B1 EP 0171731 B1 EP0171731 B1 EP 0171731B1 EP 19850109828 EP19850109828 EP 19850109828 EP 85109828 A EP85109828 A EP 85109828A EP 0171731 B1 EP0171731 B1 EP 0171731B1
Authority
EP
European Patent Office
Prior art keywords
rollers
fiber
twisting
grooves
spinning zone
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
Application number
EP19850109828
Other languages
German (de)
English (en)
Other versions
EP0171731A3 (en
EP0171731A2 (fr
Inventor
Katsutoshi Kishi
Osamu Terao
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.)
Howa Kogyo KK
Original Assignee
Howa Kogyo KK
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 Howa Kogyo KK filed Critical Howa Kogyo KK
Publication of EP0171731A2 publication Critical patent/EP0171731A2/fr
Publication of EP0171731A3 publication Critical patent/EP0171731A3/en
Application granted granted Critical
Publication of EP0171731B1 publication Critical patent/EP0171731B1/fr
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
    • D01H4/16—Friction spinning, i.e. the running surface being provided by a pair of closely spaced friction drums, e.g. at least one suction drum

Definitions

  • the present invention relates to a device for producing a yarn from a fiber. Specifically, it relates to such a device having a pair of rollers on which the opened fibers are condensed and twisted to form the yarn based on a so-called "friction spinning" system.
  • the structure of the rollers is complicated and, in order to obtain accurate relative rotations between the two rollers, the manufacturing accuracy of every part thereof must be at a high level, which causes high manufacturing costs.
  • an irritating shrill high frequency noise occurs during operation.
  • the fiber tends to enter therein accompanied by sucked air and is nipped between the rotating inner surface of the roller and the fixed suction mouth, which results in breakage of the fiber and an increase of fluff in the resultant yarn.
  • each end of the fiber is drawn in a direction opposite to the other during the rotation of the rollers, causing a disturbance in the fiber orientation in the fiber bundle, which, in turn, deteriorates the yarn quality.
  • a device for producing a yarn from a fiber, comprising a pair of rollers rotatable in the same direction and arranged in a manner confronting each other with a small gap between peripheral surfaces thereof, a spinning zone formed on the upper surfaces of the twisting rollers in the vicinity of confronting portions of the rollers for condensing a fiber to form a fiber bundle, at least one of the rollers being provided with a plurality of grooves on at least one part of the peripheral surface thereof; a first duct for supplying an opened fiber, provided with an outlet opening disposed closely above the spinning zone; a second duct for sucking air, provided with an inlet opening disposed to confront the outlet opening of the first duct and intervened by the spinning zone so that the air is sucked from the spinning zone through a channel formed by the grooves; and means for withdrawing the fiber bundle from the spinning zone in the direction substantially along the axis of the twisting rollers to form a yarn.
  • the grooves preferably may be provided only on one of the twisting rollers, which roller rotates in a direction such that the surface thereof passes through the spinning zone just before entering the gap between the pair of twisting rollers.
  • the grooves preferably may be in parallel to each other and perpendicular to a longitudinal axis of the twisting rollers.
  • the grooves preferably may be formed of at least one spiral.
  • the grooves preferably may be provided on part of the surface of at least one of the twisting rollers, which part is disposed at a distance farther than that of the remaining part of the surface of the spinning zone from the withdrawing means.
  • a "fiber” stands for a natural or synthetic fiber having a limited length, including cotton fiber, polyester fiber or other.
  • a device according to an embodiment of the present invention shown in Figures 1 through 3, comprises a pair of twisting rollers 1 and 2, a first duct 11, and second duct 15.
  • the twisting rollers 1 and 2 are disposed substantially in a horizontal direction and in parallel to each other in a confronting manner with a small gap G therebetween.
  • a spinning zone 12 having a valley shape is formed on the upper surface of the two rollers 1 and 2 along the gap G, in which a fiber bundle Y 1 is prepared from a fiber Y o as stated later.
  • Shafts 1 a and 2a of both rollers are rotatably supported by ball bearings 4 and 5 secured to a machine frame 3.
  • the first duct 11 is disposed above the spinning zone 12 for supplying an opened fiber Y o thereto.
  • the second duct 15 is disposed just beneath the gap G for withdrawing air transporting the fiber through the spinning zone 12.
  • the above gap G between the rollers 1 and 2 must be small enough, such as in a range of from 0.01 mm to 0.05 mm, to prevent the fiber from passing therethrough along with air. Further, the position of the twisting roller 1 or 2 is preferably adjustable toward the other roller to vary the width of the gap G in accordance with spinning conditions, such as a yarn thickness or a twist constant to be imparted to the resultant yarn.
  • the two rollers 1 and 2 are driven at substantially the same rate and direction as indicated by an arrow A in Figure 3, relative to each other, by a motor (not shown) via pulleys 6 and 7 secured to ends of the shafts 1a and 2a, respectively, and a belt 8 commonly engaged around the pulleys 6 and 7.
  • One of the twisting rollers 1 and 2 for example, roller 1 shown at the upper side of Figure 1 in this embodiment, has a plurality of peripheral grooves 9 arranged in parallel to each other and perpendcular to an axis of the roller on substantially the entire outer surface thereof.
  • the grooves 9 are equidistantly arranged, as shown in Figure 4, they may be provided at different intervals from each other and also the width and profile of the groove 9 may be varied.
  • the size of the groove profile and the number thereof should be decided in such a manner that air transporting the fiber Y o through the first duct 11 onto the spinning zone 12 in a valley form can pass through a channel 9a formed in the spinning zone 12 by an inner wall of the groove 9 and the surface portion of the other roller 2 confronting the groove 9, allowing only the staple fiber Y o to leave in the spinning zone 12.
  • Preferable dimensions of the grooves are, for example, a pitch of 2 mm, a width of 1 mm, and a depth of 0.5 mm.
  • the groove 9 completely encircles the roller 1 in this embodiment, it may be intermitted, for example, by embedding part of the continuous groove or by randomly arranging a plurality of channel lengths on the surface of the roller, provided the intermitted portions are not aligned with those of the adjacent grooves.
  • the rotational direction of the rollers 1 and 2 is decided in such a manner that the surface of the roller 1 provided with the grooves 9 enters the gap G from the top and is directed to a suction mouth 19 of the second duct 15, described in more detail later, and conversely, the surface of the other roller 2 enters the gap G from below, away from the suction mouth 19.
  • the roller 1 is preferably made of a metal and the roller 2 is preferably wrapped with a synthetic rubber sheath, although the materials thereof are not necessarily restricted thereto.
  • the first duct 11 has a triangular profile and is connected by a narrow base portion to known means for opening the fiber, such as a combing roller 10, and confronts the spinning zone 12 with a wide mouth portion 14, as illustrated in Figures 2 and 3, whereby an individually separated fiber can be fed to the valley of the spinning zone 12.
  • Lower ends of side walls 11 a of the mouth portion 14 are positioned closely to the upper surfaces of the rollers 1 and 2, and a lower end of a back wall 11 b is provided with a plate member 13 in a shape of triangle complementary to a profile of the spinning zone 12 for preventing extrication of the fiber from the spinning zone 12.
  • the second duct 15 comprises a suction body 16 secured to the machine frame 3 and a plurality of shield plates 17 and 18 fixed to the suction body 16.
  • the upper ends of the shield plates 17, 18 are positioned closely to the lower surfaces of the rollers 1 and 2 for air tight seal of the underside of the spinning zone 12.
  • the suction body 16 has a mouth portion 19 widening toward the end and communicating to a suction source (not shown) via an orifice 20, an aperture 21 bored through the machine frame 3, and a pipe 22.
  • One end of the spinning zone 12 opposite to the plate member 13 opens for withdrawing a fiber bundle Y 1 formed on the spinning zone 12 as a yarn Y from the latter by a withdrawing means 24 comprising a pair of delivery rollers 25 and 26 in the direction parallel to the axis of the twisting rollers 1 and 2.
  • the delivery rollers 25, 26 are rotated in the direction indicated by an arrow B in Figure 2 by a motor (not shown).
  • the twisting rollers 1 and 2 Prior to feeding the fiber, the twisting rollers 1 and 2 are rotated in the same direction as stated before, while air is sucked from the mouth portion 19 of the second duct 15. Thereafter, the separated fiber Y o is transported from the combing roller 10 into the first duct 11 together with air. The air is sucked through the channel 9a formed by the parallel grooves 9 of the roller 1 into the second duct 15 and, accompanying this, the fiber Y o is transferred on the spinning zone 12, namely the upper surface of the rollers 1 and 2 in the vicinity of the. gap 6.
  • the posture of the fiber Y o flying through the first duct 11 can be properly controlled by the profile of the duct 11 and a flow rate of the air so that the fiber finally lies substantially in parallel to the axis of the rollers 1 and 2 as illustrated in Figure 2.
  • the fiber Y o is gradually brought into the bottom of the spinning zone 12 as the fiber rotates while keeping the parallel state to the rollers and is left there while separated from the air.
  • the fiber Y o is gradually deposited on the spinning zone 12 and forms a fiber bundle Y 1 which is further brought into the bottom of the spinning zone 12 by the air passing thereby through the channel 9a.
  • the fiber bundle Y 1 is pressed onto the surfaces of the rollers 1 and 2 and, therefore, is rotated about its own axis in one direction as shown in Figures 5 and 6 by the friction from both rollers 1 and 2, whereby the formation of the fiber bundle Y, is smoothly continued.
  • a preliminarily prepared seed yarn (not shown) is reversely introduced into the spinning zone 12 through the opening provided at one side of the spinning zone 12 and entangled with the fiber bundle Y i .
  • the seed yarn is withdrawn therefrom through the opening by means of the delivery rollers 25 and 26 while rotating about its own axis due to rotation of the twisting rollers 1 and 2.
  • the newly formed fiber bundle Y follows thereto to form the yarn Y.
  • FIG 7 a second embodiment of the present invention is illustrated, wherein the grooves 9e formed of a plurality of spirals are provided only on the right side part of the peripheral surface of the twisting roller 1e.
  • the spiral groove 9e is preferably inclined in such a manner that the air flow directed opposite to the yarn withdrawal direction generates in the valley between the rollers due to rotation of the latter, because the parallelism of the fibers supplied in the spinning zone is improved.
  • the surface portions of the two rollers without the grooves 9e are substantially in contact with each other, whereby the air flow can be shut in this portion and formation of the fiber bundle is carried out only in the other portion where the grooves 9e are provided.
  • the spiral grooves may be replaced by the parallel ones as in the first embodiment shown in Figure 1 through 6.
  • Figure 8 illustrates a third embodiment of the present invention, in which both twisting rollers 1f and 2f are provided with parallel grooves 9f i and 9f 2 , respectively, on the entire peripheral surfaces thereof.
  • Figure 9 illustrates a fourth embodiment of the present invention, in which spiral grooves 9g 1 and 9g 2 which intersect each other are provided on the entire peripheral surface of one twisting roller lg.
  • the twisting rollers may be tapered so that a peripheral speed of the withdrawal side of the rollers is larger than that of the other side.
  • the feeding direction of the staple fiber may be altered as desired.

Landscapes

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

Claims (5)

1. Dispositif pour la production d'un fil à partir de fibres, comprenant une paire de rouleaux de torsion qui peuvent tourner dans le même sens et qui sont disposés en face l'un de l'autre avec un petit intervalle entre leurs surfaces périphériques, une zone de filature étant ménagée sur les surfaces supérieures desdits rouleaux de torsion au voisinage de parties en regard desdits rouleaux de torsion pour condenser les fibres afin de former un faisceau de fibres, au moins l'un desdits rouleaux comportant une pluralité de rainures sur au moins une partie de sa surface périphérique; un premier conduit d'amenée d'une fibre ouverte, comportant un orifice de sortie situé juste au-dessus de ladite zone de filature; un deuxième conduit pour l'aspiration d'air, comportant un orifice d'entrée disposé en regard dudit orifice de sortie dudit premier conduit avec interposition de ladite zone de filature de sorte que l'air est aspiré à partir de ladite zone de filature à travers un canal défini par lesdites rainures; et des moyens pour extraire le faisceau de fibres de ladite zone de filature sensiblement dans la direction d'un axe desdits rouleaux de torsion, pour former un fil.
2. Dispositif suivant la revendication 1, dans lequel lesdites rainures sont prévues sur un seul desdits rouleaux de torsion, ce rouleau tournant dans un sens tel que sa surface traverse ladite zone de filature juste avant d'entrer dans ledit intervalle entre ladite paire de rouleaux de torsion.
3. Dispositif suivant la revendication 1, dans lequel lesdites rainures sont parallèles les unes aux autres et perpendiculaires à un axe longitudinal desdits rouleaux de torsion.
4. Dispositif suivant la revendication 1, dans lequel lesdites rainures sont définies par au moins une spire.
5. Dispositif suivant la revendication 1, dans lequel lesdites rainures sont prévues sur une partie de la surface d'au moins l'un desdits rouleaux de torsion, cette partie étant située à une distance plus grande que celle de la partie restante de la surface dudit rouleau de torsion, par rapport auxdits moyens d'extraction.
EP19850109828 1984-08-11 1985-08-05 Dispositif de filature Expired EP0171731B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP16804784A JPS6147830A (ja) 1984-08-11 1984-08-11 紡糸装置
JP168047/84 1984-08-11

Publications (3)

Publication Number Publication Date
EP0171731A2 EP0171731A2 (fr) 1986-02-19
EP0171731A3 EP0171731A3 (en) 1987-05-13
EP0171731B1 true EP0171731B1 (fr) 1989-10-25

Family

ID=15860838

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850109828 Expired EP0171731B1 (fr) 1984-08-11 1985-08-05 Dispositif de filature

Country Status (3)

Country Link
EP (1) EP0171731B1 (fr)
JP (1) JPS6147830A (fr)
DE (1) DE3573935D1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT338666B (de) * 1976-02-17 1977-09-12 Fehrer Ernst Gmbh Vorrichtung zum spinnen textiler fasern
DE2810184A1 (de) * 1978-03-09 1979-09-13 Barmag Barmer Maschf Open-end-spinnvorrichtung
DE3307082A1 (de) * 1983-03-01 1984-09-06 Fritz 7347 Bad Überkingen Stahlecker Oe-friktionsspinnvorrichtung
DE3308249A1 (de) * 1983-03-09 1984-09-13 Fritz 7347 Bad Überkingen Stahlecker Oe-friktionsspinnvorrichtung

Also Published As

Publication number Publication date
EP0171731A3 (en) 1987-05-13
DE3573935D1 (en) 1989-11-30
JPS6147830A (ja) 1986-03-08
EP0171731A2 (fr) 1986-02-19

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