EP0447823A2 - Procédé de filage et dispositif pour la production d'un fil - Google Patents

Procédé de filage et dispositif pour la production d'un fil Download PDF

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Publication number
EP0447823A2
EP0447823A2 EP91102415A EP91102415A EP0447823A2 EP 0447823 A2 EP0447823 A2 EP 0447823A2 EP 91102415 A EP91102415 A EP 91102415A EP 91102415 A EP91102415 A EP 91102415A EP 0447823 A2 EP0447823 A2 EP 0447823A2
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EP
European Patent Office
Prior art keywords
collecting
fiber
fibers
collecting surface
suction
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Withdrawn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
EP91102415A
Other languages
German (de)
English (en)
Other versions
EP0447823A3 (en
Inventor
Johann Rottmayr
Werner Billner
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.)
Rieter Ingolstadt Spinnereimaschinenbau AG
Original Assignee
Rieter Ingolstadt Spinnereimaschinenbau AG
Schubert und Salzer Maschinenfabrik 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 Rieter Ingolstadt Spinnereimaschinenbau AG, Schubert und Salzer Maschinenfabrik AG filed Critical Rieter Ingolstadt Spinnereimaschinenbau AG
Publication of EP0447823A2 publication Critical patent/EP0447823A2/fr
Publication of EP0447823A3 publication Critical patent/EP0447823A3/de
Withdrawn legal-status Critical Current

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    • 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
    • D01H4/02—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 a fluid, e.g. air vortex
    • 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 invention relates to a spinning method and a device according to the preambles of claims 1 and 9.
  • the fiber material for the yarn is deposited as individual fibers on a collecting surface moving in the thread take-off direction. This fiber material is then continuously removed as a thread from the collecting surface, with twisting. The already finished thread is not fed by fibers, but these are each fed to the end of the thread.
  • An oriented placement of the fibers on the collecting surface is achieved in that the individual fibers are fed in the direction of the movement of the collecting surface.
  • the fiber material is bundled and / or doubled on the collecting surface to form a fiber ribbon which has the fiber mass necessary for the desired thread.
  • the surface speed of the collecting surface is approximately equal to the thread take-off speed, so that it is already on the collecting surface the full fiber mass required for the finished thread is collected and conveyed as a closed fiber formation in the direction of the swirl element and twisted together to form the thread.
  • this does not always lead to the desired qualitatively good yarn, so that in a preferred embodiment a warping with an associated further parallelization of the fibers is brought about by the fact that the surface speed of the collecting surface is lower than the thread pulling speed. As a result, the fibers are stretched when they are pulled off the collecting surface.
  • a disadvantage of this method is that the fibers approaching from the opening roller are compressed when they hit the collecting surface.
  • DD 264.944 A1 shows fiber layers for internal friction spinning devices for the exact feeding and stretching of the delivered and dissolved fibers.
  • the fibers are axially stretched in a fiber applicator and slide from the fiber applicator onto the concave inner surface of a friction bell.
  • the fibers are fed to an easily twistable fiber brush, which rotates by rolling on the concave inner surface of the Friction bell in connection with the suction effect of exhaust air holes.
  • the thread collected for the finished thread cross section receives a further rotation between the opposing surfaces of the following convex friction roller and the concave friction bell. An even higher rotation counteracting the reverse torque can be achieved by a downstream swirl sensor.
  • a disadvantage of this device is that the fiber brush is easily twisted, and thus stands in the way of high yarn uniformity, since strong fluctuations in the spinning tension have an unfavorable influence on the yarn quality.
  • Another disadvantage is that the thread is held only by the easily twistable fiber brush between the opposing surfaces of the friction roller and the concave friction bell. A rotation of the thread between the friction roller and the friction bell, which is independent of the speed of the collecting surface, is not possible.
  • Another swirl device is therefore connected downstream of the friction roller and the friction bell.
  • the object of the invention is to provide a method and an apparatus by which fibers are fed to a twist organ in order to achieve a high quality yarn and by which the disadvantages of the prior art are avoided.
  • the fibers are accumulated on a suction edge forming a collecting line and the resulting fiber accumulation is pre-rotated on the collecting line.
  • This has the advantage that the fibers have an extremely good orientation in the fiber accumulation.
  • the fiber accumulation which is constantly made up of new fibers, lies on the collecting line during the spinning process and is pre-turned there.
  • the fibers on the collection surface are conveyed to the collection line at an angle of less than 45 ° between the fiber axis and collection line, the fibers are well and uniformly integrated into the rotating fiber collection. If the fibers on the collecting surface are conveyed to the collecting line essentially parallel to the collecting line, the fibers roll off one another without the fibers being helically integrated into the fiber collection. The orientation of the individual fibers is particularly good.
  • the fiber accumulation is rotated more slowly than it is rotated by the following swirl element. This creates a certain stretch of the Fibers in the fiber accumulation, which ensures an orderly position of the fibers when they reach the swirl organ.
  • the fibers are fed to the collecting line in the manner of a fleece, in which the fibers lie parallel to one another.
  • the fiber accumulation can be given thrust or tensile force components at the collecting line. This causes the fiber accumulation to be doubled or stretched.
  • the fiber accumulation is rotated in a direction that is opposite to the direction of rotation by the swirl element.
  • the point of change of the resulting directions of rotation in the fiber accumulation or the yarn formed generally takes place in the area of the collecting surface.
  • the collecting surface can be moved essentially transversely to a collecting line collecting the fibers and is formed separately from the swirl element. This advantageously creates a separation of the initiation of rotation into the fiber accumulation around the yarn. Surrender Thereby significant advantages due to the different speeds, which on the one hand has the collecting surface for transporting the fibers to the collecting line and on the other hand the twisting element for introducing the final twist into the yarn.
  • the decoupling of the collecting surface and the twist element has shown clear advantages in the orientation of the fibers and thus also in the yarn quality and yarn tenacity.
  • Sieve rollers, sieve disks or sieve belts can be used as collecting surfaces.
  • the collecting surface is sucked through the sieve surface.
  • the fibers are held on the collection surface for transport from the fiber feed point to the collection line.
  • Friction roller pairs or air spinnerets can advantageously be used as swirl members.
  • z. B. swirl tubes or other rotation-imparting organs can be used.
  • the direction of movement of the collecting surface is advantageously opposite to the direction of rotation of the pair of friction rollers.
  • a lower speed of the collecting surface compared to the speed of the friction rollers gives advantages in terms of yarn quality.
  • the friction rollers introduce more twist into the yarn than through the collecting surface into the fiber accumulation.
  • the point of change from the rotation of the yarn to the rotation of the fiber accumulation lies in the area of the collecting surface.
  • the collecting line on the collecting surface is defined by a slot edge of the suction insert. At this suction slot edge, the fibers detach from the collecting surface and are pre-turned in the fiber accumulation.
  • a particularly good integration of the fibers into the fiber accumulation has resulted if the collecting line encloses an angle between +/- 20 ° with the vertical on the direction of movement of the collecting surface.
  • the angle between the main orientation direction of the perforation of the collecting surface and the collecting line is less than 45 °.
  • the fibers are integrated into the fiber collection without compression and lead to a high strength of the yarn. If the main direction of orientation of the perforation of the collecting surface and the collecting line or the slot edge are parallel to one another, then the fibers roll along one another along their longitudinal axis, with no spiral twisting of the fibers occurring. The drawn fibers are then bound into the rotating yarn.
  • FIG. 1 shows an exemplary embodiment in which fibers 31 are fed through a fiber feed channel 3 onto a screen roller 1, which serves as a collecting surface.
  • the fibers 31 land with a fiber head 32 on the suctioned part of the screen roller 1.
  • the suction is carried out through a rectangular suction slot 21 in a suction insert 2 of the screen roller 1. While the fiber head 32 is already fixed on the screened roller 1, continue to move in the direction of flight .
  • a fiber rollover takes place.
  • the main orientation direction 11 of the suction holes 12 essentially results from a shorter distance between the individual suction holes 12 than the suction holes 12 which are not arranged in the main orientation direction.
  • the main orientation direction 11 has an angle ⁇ with a suction edge 23 of the rectangular suction slot 21. This angle ⁇ is less than 45 °, preferably 20 °.
  • the fibers 31 lay down along the main orientation direction 11 of the suction holes 12 on the screen roller 1, since the suction forces act most strongly on the fibers 31 on this line. In any other direction, the distance from one suction hole 12 to the next suction hole 12 would be greater, so that the fiber 31 would not be guided over a greater length.
  • the fibers 31 therefore endeavor to lay down on the screen roller 1 along the main orientation direction 11 when the fibers are fed in at an angle which permits a fiber rollover or which is essentially parallel to the main orientation direction 11. Furthermore, it is necessary for the deposit in the main orientation direction 11 that the screen roller 1 has a rotational speed in comparison to the fiber flying speed, which allows the fibers 31 to assume the desired position.
  • the fibers 31 are then conveyed on the screen roller in the direction of a suction edge 23.
  • the fibers 31 accumulate at the suction edge 23 of the rectangular suction slot 21. At this point there is essentially a balance between the entraining forces of the screen roller 1, the suction force which acts through the suction slot 21, and the centrifugal force which tries to throw off the fibers 31. This equilibrium of forces creates a fiber cycle at the suction edge 23.
  • the fibers 31 are carried along to the suction edge 23, detach there because the suction force is missing after the suction edge 23, and are then brought back again by the suction of the suction insert 2.
  • the fibers 31 By delivering the fibers 31 at an angle ⁇ to the suction edge 23 or collecting line 13, the fibers 31 are accumulated to form a fiber accumulation 34 and rotated in such a way that they wrap around one another.
  • the fibers are pre-twisted with great uniformity to form a type of fiber ribbon with fiber spirals and, after incorporation into the end of the yarn, are drawn off from the screen roller by a pair of draw-off rollers 5.
  • the collecting line 13 is parallel to the surface line of the screen roller 1 in the exemplary embodiment in FIG. 1.
  • the fiber accumulation 34 is rotated counter to the direction of movement B of the screen roller 1, ie it rolls on the screen roller 1. Due to a slightly increased take-off speed by the take-off rollers 5 compared to the delivery of the fibers 31, there is little warping, whereby the fibers 31 in the fiber accumulation 34 are stretched again.
  • the fibers 31 are screwed in faster than they are delivered.
  • the fiber spindles that are created on the suction edge are twisted together, thereby avoiding enveloping fibers.
  • a swirl member 4 is arranged between the extraction roller pair 5 and the screen roller 1.
  • the swirl member 4 consists of a pair of friction rollers with a suctioned friction roller 41 and an un suctioned friction roller 42. Both friction rollers rotate in the same direction D. The direction of rotation D is opposite to the direction of movement B of the screen roller.
  • the fiber accumulation 34 is brought into its predetermined thread rotation counter to the pre-rotation.
  • the fiber accumulation 34 is held in the spider gusset of the friction rollers 41 and 42 by a suction insert 43.
  • either a suctioned friction roller or two suctioned friction rollers can be used, as in this exemplary embodiment.
  • the screen roller 1 and the swirl element 4 are advantageously in Thread take-off direction arranged as close as possible to each other. This relates in particular to the arrangement of the suction inserts 2 and 43.
  • care must be taken that the unguided path of the fiber accumulation 34 between the screen roller 1 and the swirl element 4 is as short as possible.
  • the suction inserts 2 and 43 are therefore advantageously to be arranged directly next to one another.
  • the lengths of the suction inserts 2 and 43 are dimensioned such that they can fulfill their function. This means that the suction insert 2 of the screen roller 1 must have a length which allows the fibers 31 to lay down along the main orientation direction 11. In the case of Fig. 1, the length of the suction insert 2 must be dimensioned such that the fibers can perform a fiber rollover and after the rollover can again be sucked over their entire length. The length of the suction insert 43 must be dimensioned such that it is sufficient for a pre-rotation of the pre-twisted fiber accumulation 34.
  • the position of the suction slot 43 with respect to the gusset gap merely effects a fine tuning of the frictional action between the surfaces of the friction rollers 41 and 42 and the yarn.
  • the suction slot 43 can thus be arranged either in front of or behind the narrowest point of the gusset gap. The location of the suction slot 43 causes a force to pull the yarn into the gusset.
  • the width of the suction insert 2 must be so large that the fibers between the feed point and the collecting line 13 have enough space to lie against the suction holes 12 in a stretched manner along the main orientation direction 11.
  • the width of the suction insert 12 therefore depends on the angle ⁇ which the main orientation direction 11 makes with the suction edge 23 and on the length of the fibers. The larger the angle ⁇ , the wider the suction insert 2 must be designed with the same fiber length.
  • the width of the suction insert 43 must be such that the yarn is held in the gusset between the friction rollers 41 and 42.
  • the aim when dimensioning the size of the suction inserts should be such that they are as small as possible. This saves energy during suction and thus ensures inexpensive production of the yarn.
  • a relatively low rotational speed of the screen roller 1 in comparison to the friction rollers 41, 42 has proven to be advantageous.
  • the low rotational speed of the screen roller 1 enables the fibers 31 to contact the suction holes 12 along the main orientation direction 11.
  • the low speed thus allows a better orientation of the fibers 31, since the centrifugal forces acting on them due to the rotating Screen roller 1 act, are lower.
  • the aim is to keep the speed of rotation of the screen roller 1 as low as possible
  • the minimum speed of the screen roller 1 is limited by the fact that fibers 31 must be sucked into the suction holes 12 of the collecting surface.
  • the size of the suction holes 12 is therefore to be dimensioned such that on the one hand sufficient suction force acts on the fibers 31, and on the other hand the size of the suction hole 12 is so small that there is sufficient resistance to sucking the fibers 31 into the suction holes 12 so that the fibers between the feeding point and collecting line 13 can withstand suction.
  • the minimum speed of the screen roller 1 is additionally limited by the fact that the fibers 31 do not form a dense fleece on the screen roller 1, but rather are fed to the collecting line 13 without being influenced by one another.
  • the fiber feed channel 3 is arranged on the screen roller 1 in such a way that the fibers 31 are fed substantially tangentially to the outer surface of the screen roller 1. With such feeding, the fibers 31 are able to lay down on the screen roller 1 almost without compression.
  • the fiber feed channel 3 should also be arranged on the screen roller 1 such that the suction effect of the suction insert 2 acts in the fiber feed channel 3. Due to the resulting negative pressure in the fiber feed channel 3, the fibers 31 are sucked in the direction of the mouth of the fiber feed channel 3.
  • the inclination of the fiber feed channel 3 and the cut of the fiber feed channel 3 through the mouth is designed in such a way that the fiber deposit in the fiber feed channel 3 is spread as widely as possible compared to the fiber flight. This creates a lot of space for the single fiber 31 created, whereby an undisturbed fiber flashover can take place.
  • the mouth of the fiber feed channel 3 does not necessarily have to be parallel to the surface line. Although this leads to a simpler design of the fiber feed channel 3, it is not absolutely necessary.
  • the principle of the present invention is based on open-end spinning.
  • Individual fibers 31 are conveyed to the collecting line 13, where they are duplicated.
  • the fiber feed to the screen roller 1 takes place via a opening roller and the fiber feed channel 3, the fibers 31 being deposited on the screen roller 1 as a thin fiber web.
  • These deposited fibers 31 are essentially parallelized, that is to say they lie essentially parallel to one another in the main orientation direction 11.
  • the thin fiber web is collected at the collecting line 13 and begins to rotate in the interplay of the forces.
  • all of the fibers 31 required for the yarn formation are collected in the manner described above.
  • the withdrawal of the fibers 31 takes place continuously when the amount of fibers required for the yarn has been accumulated.
  • this fiber accumulation 34 is again slightly stretched when it is drawn off, so that the fibers 31 can maintain the desired good orientation or can assume it completely.
  • the swirl organ 4 When the swirl is given by the swirl organ 4, a real wire is created. Delivery speeds as they are possible with unconventional fast spinning processes, ie delivery speeds in the range of over 300 m / min can be carried out with this inventive spinning process.
  • sheath fiber formation is avoided in the present invention, since the rotation of the fiber accumulation is driven by the swirl element and not by the collecting surface. As a result, the fiber accumulation is twisted more than is customary in conventional friction spinning processes in which the drive of the yarn starts from the combined collecting and twisting surface.
  • the initiation of rotation into the fiber accumulation 34 takes place through the screen roller 1 in the opposite direction to that in the following twist element 4. In addition, less rotation is initiated in the fiber accumulation 34 than in the twist element 4. The difference between the two rotations results in the final rotation after the yarn is drawn off.
  • the point of change of the two directions of rotation is in the area of the screen roller 1.
  • the opposite direction of rotation of the swirl device causes the fiber accumulation 34 to the collecting line 13 remains and does not migrate from it towards the mouth of the fiber feed channel. This would occur because the rotational movement of the fiber accumulation would run upwards against the direction of rotation of the collecting roller. This would render the effect of good fiber orientation obsolete. Same directions of rotation of screen roller 1 and swirl 4 can be used when the fiber accumulation z. B. is fluidly held at the collecting line 13.
  • Fig. 2 shows a spinning device according to the invention, which is constructed in essential parts similar to the device of Fig. 1.
  • the most significant difference from Fig. 1 is that the collecting line 13 is not arranged parallel to the surface line 14 of the screen roller 1, but around the Angle ⁇ is inclined to a surface line 14. The inclination by the angle ⁇ creates a helical collecting line 13 on the surface of the screen roller 1.
  • the fibers 31 are fed, similarly to the exemplary embodiment in FIG. 1, via the fiber feed channel 3 of the screen roller 1 in the region of the suction insert 2 or the suction slot 22.
  • the fibers 31 meet with the fiber head 32 on the screen roller 1 moving in direction B, roll over and lay down on the screen roller 1 in the main orientation direction 11 of the suction holes 12.
  • the suction slot 22 is triangular, the cathete lying parallel to the generatrix and the hypotenuse of the triangle at the angle ⁇ forms the collecting line 13.
  • the angle ⁇ between the surface line 14 and the main orientation direction 11 is equal to the angle ⁇ between the surface line 14 and the suction edge 23 of the suction slot 22.
  • the fibers accordingly accumulate parallel to one another on the collecting line 13 and rotate essentially parallel to the axis of the fiber collection 34. This means that the fibers 31 ideally roll against each other.
  • a vector U denotes the peripheral force which acts on the fiber accumulation 34 through the rotating sieve roller 1.
  • This circumferential force U and the suction forces of the suction insert 2 and the centrifugal forces of the rotating sieve roller 1 acting on the fibers or the fiber accumulation result in a rotation component T which acts perpendicularly on the longitudinal axis of the fiber accumulation 34.
  • This force component A causes the depending on the direction of withdrawal Fiber accumulation either a shear force component or a tensile force component on the fiber accumulation 34. If the fiber accumulation 34 is drawn off by means of the draw-off rollers 5 via the swirl element 4 with the friction rollers 41 and 42, the force component A pushes the fibers in the thread withdrawal direction. The spinning tension is thus somewhat reduced. The fibers are slightly pushed open compared to their attachment. If the take-off takes place by means of the take-off rollers 5 'via the friction rollers 41' and 42 'of the swirl member 4', then the force component A acts as a pulling force against the pull-off direction. This increases the spinning tension somewhat. The fiber accumulation 34 is stretched by the tensile force.
  • the swirl members 4 and 4 'and the take-off rollers 5 and 5' are arranged in the embodiment of FIG. 2 in a straight line extension of the collecting line 13. This ensures that the fiber accumulation 34 is fed to the swirl element 4 or 4 'without changing the position of the individual fibers 31.
  • the arrangement according to the fiber feed channel 3 ' is also possible. While the arrangement of the fiber feed channel 3 together with the position of the main direction of orientation 11 of the suction holes 12 causes the fibers 31 to roll over when they land on the screen roller 1, this is avoided when a fiber feed channel 3 'is arranged.
  • the fiber feed channel 3 ' is arranged such that the direction of flight of the fibers essentially in the direction of Main orientation 11 of the suction holes 12 is directed. The fibers therefore do not roll over, but land in the manner of floating on the suction holes 12.
  • the inclination of the fiber feed channel 3 ' corresponds approximately to the angle ⁇ of the main orientation direction 11 of the suction holes 12.
  • the fibers 31' are held by the suction force of the screen roller 1 when landing with the fiber head 32 'and the fiber end 33' becomes the movement direction B of the Sieve roller 1 placed on the sieve roller 1 along the main orientation direction 11.
  • FIG. 3 shows an advantageous structural embodiment of an embodiment similar to FIG. 2.
  • the fibers are fed along the fiber feed channel 3 onto the screen roller 1 in the area of the suction slot 22. Due to the arrangement of the suction holes 12 in the main orientation direction 11 with respect to the fiber feed direction, the fibers roll over and lay against the suction holes 12 in the main orientation direction 11.
  • the fibers 31 are fed in tangentially to the surface of the screen roller 1, whereby an orderly fiber deposition is advantageously ensured.
  • the angle ⁇ between the surface line 14 and the main orientation direction 11 and the angle ⁇ between the surface line 14 and the collection line 13 are the same, so that a parallel fiber accumulation 34 is formed on the collection line 13.
  • the suctioned friction roller 41 has both the same diameter and the same axis. This results in simplifications in the mounting of the screen roller 1 and the swirl element 4. In addition, there are advantages in the design of the suction of the friction roller 41 and the screen roller 1.
  • this arrangement of the swirl element 4 in relation to the screen roller 1 or the collecting line 13 means that it is deflected on the way from the collecting line 13 via the gusset of the swirl element 4 to the take-off rollers 5.
  • the end of the suction slot 22 facing the swirl element 4 has a lateral offset V with respect to the suction insert 43 of the friction roller 41, as a result of which the fiber accumulation lies against the collecting line 13 up to the end of the suction slot 22.
  • the fiber accumulation 34 is hereby made possible, in a straight line continuation, to cover the un suctioned path between the screen roller 1 and the friction roller 41. This results in advantages in maintaining the orientation of the fiber accumulation 34.
  • the fiber accumulation 34 is deflected in the direction of the gusset gap of the swirl element 41 and drawn off in a straight line from the take-off rollers 5.
  • the deflection of the fiber accumulation essentially takes place in the area of the suction insert 43.
  • the fiber accumulation 34 fed to the swirl element 4 is carried along by the friction roller 41 rotating counter to the direction of movement B of the screen roller 1 in the area of the suction insert 43 into the gusset gap between the two friction rollers 41 and 42.
  • the suction slot edge of the suction insert 43 in the gusset gap between the two friction rollers 41 and 42 causes the fibers 31 to be screwed in until the resulting thread is finally twisted.
  • the rotational speed of the friction rollers 41 and 42 is, as in the previous exemplary embodiments, a multiple of the rotational speed of the screen roller 1.
  • FIG. 4 shows an embodiment in which the directions of rotation of the screen roller 1 and the friction rollers 41 and 42 are opposite to those of FIG. 3.
  • the fibers are accordingly fed in through the fiber feed channel 3, which is arranged on the side facing away from the non-suctioned friction roller 42.
  • the fiber feed channel 3 which is arranged on the side facing away from the non-suctioned friction roller 42.
  • the fibers 31 land with the fiber head 32 first in the area of a suctioned suction hole 12 and then lie essentially against the suction holes 12 along the main orientation direction 11.
  • FIG. 4 shows an embodiment in which the directions of rotation of the screen roller 1 and the friction rollers 41 and 42 are opposite to those of FIG. 3.
  • the fibers are accordingly fed in through the fiber feed channel 3, which is arranged on the side facing away from the non-suctioned friction roller 42.
  • the angle ⁇ between the surface line and the fiber deposition direction, ie the main orientation direction 11, is greater than the angle ⁇ between the suction edge 23 and the surface line 14. Similar to the exemplary embodiment in FIG. 1, this causes the fibers 31 to be twisted in the form of a helical line into the fiber collection 34 at the collection line 13.
  • the fibers 31 are first integrated with the fiber head 32 in the fiber collection 34.
  • the twisting of the fibers 31 in the fiber accumulation 34 results in a higher strength in the fiber ribbon of the fiber accumulation 34 than in the cases in which the fibers 31 lie parallel to one another in the fiber accumulation 34.
  • the fibers 31 can be stretched by a higher yarn take-off speed compared to the fiber feed speed during the binding, which is advantageous affects the yarn strength.
  • a force component arises in the fiber accumulation 34 in addition to the fiber twist, which in the present exemplary embodiment brings about a thrust in the fiber accumulation 34.
  • the lateral offset of the suction inserts 2 and 43 is to be selected in the same way as set out in the description of FIG. 3.
  • a screen belt can also be used in all of the exemplary embodiments, which conveys the fibers in the direction of movement B from the fiber feed zone to the collecting line.
  • FIG. 5 shows a section through the screen roller 1 in the region of the feeding and collection of the fibers 31.
  • the fibers 31 are fed essentially tangentially through the fiber feed channel 3 onto the surface of the screen roller 1.
  • the fibers 31 land on the screen roller 1 in the area of the suction slot 22 of the suction insert 2.
  • the fibers 31 are held on the surface of the screen roller 1 and moved by the rotation of the screen roller 1 in the direction of movement B to the suction edge 23.
  • the suction edge 23 there is no longer any suction force on the fibers 31, as a result of which they leave the surface of the screen roller 1 due to the centrifugal force.
  • the fibers then roll off at the collecting line 13 in the fiber collection 34 in the direction of rotation A.
  • the fiber accumulation 34 rotates in the direction of rotation A due to a play of forces between the suction force which acts on the surface of the screen roller 1 through the suction holes 12 and the centrifugal force which causes the fibers 31 to detach in the region of the non-vacuumed zone of the screen roller 1.
  • the direction of rotation A of the fiber accumulation 34 is opposite to the direction of movement B of the screen roller 1.
  • Fig. 6 the rotational movements of the individual rollers and the fiber accumulation 34 and the yarn 35 are shown to clarify the rotation conditions.
  • the fibers 31 fed through the fiber feed channel 3 are conveyed to the collecting line 13 in the direction of movement B of the screen roller 1. There they are integrated into the fiber accumulation 34 and rotated in the direction of rotation A against the direction of movement B.
  • the friction rollers 41 and 42 rotate in the direction of rotation D at a much higher speed than the speed of rotation of the screen roller 1.
  • the fiber accumulation 34 is in the gusset between the two friction rollers 41 and 42 by the friction effect of the friction rollers 41 and 42 as well as by the suction force caused by the suction insert 43 is caused to be held.
  • the fiber accumulation 34 is rotated in the gusset of the friction rollers 41 and 42 in a direction of rotation G against the direction of rotation A on the screen roller 1.
  • This reversal of rotation causes the fibers 31 in the fiber accumulation 34 to be stretched again and oriented and the resulting yarn receives its final and desired twist.
  • the yarn twisted in this way is drawn off by the take-off rollers 5.
  • the change in the direction of rotation A in the direction of rotation G generally takes place in the region of the screen roller 1, since the rotation by the friction rollers 41, 42 overlaps the rotation of the screen roller 1.
  • FIG. 7 shows an exemplary embodiment according to the invention, in which a screen disc 7 is arranged as the collecting surface and an air spinneret is arranged as the swirl element 4.
  • Fibers 31 are fed via the fiber feed channel 3 to the suction zone of the sieve 7. Just as in the embodiment of the screen roller, the fibers 31 lie along the main orientation direction 11 of the suction holes 12 on the screen disk 7. In this position, they are conveyed to the collecting line 13, which is formed by the suction edge 23 of the suction slot 22.
  • the position of the main orientation direction 11 is in relation to the radius 15 of the screen disk 7 inclined by the angle ⁇ .
  • Angle ⁇ has the same size and direction as the angle ⁇ between the suction edge 23 and the radius 15.
  • the fiber accumulation 34 is pre-rotated on the screen disk 7 in a similar manner to the collecting line 13 in the exemplary embodiments described above.
  • This pre-turned fiber accumulation 34 is fed to a swirl member 4 arranged downstream of the fiber accumulation 34.
  • the swirl member 4 of the embodiment of FIG. 7 consists of the air nozzle 44.
  • the final and predetermined rotation of the yarn 35 is achieved for the fiber accumulation 34.
  • the resulting yarn 35 is drawn off by means of the take-off rollers 5.
  • An advantage of the device according to FIG. 7 is that a high-speed drafting device, as is usually necessary in air spinning devices, is avoided.
  • the collecting surface is designed as a sieve belt 8.
  • the fibers are in turn fed to the sieve belt 8 in the suction area via the fiber feed channel 3.
  • the fibers are moved to the collecting line 13, roll there in a fiber collection 34 and are drawn off from the screen belt 8.
  • the suction slot 21 of the suction insert 2, which sucks the fiber feed zone up to the collecting line 13, is designed in such a way that different areas are formed on the collecting line 13.
  • a pushing force is applied to the end of the fiber accumulation. This causes the individual fibers that do not yet have a great degree of cohesion at the end of the fiber accumulation 34 to be pushed on.
  • a neutral zone N is arranged in the draw-off direction following this thrust zone.
  • the fiber accumulation 34 is pre-rotated therein without shear and tensile forces. A good orientation of the fibers is guaranteed. This is followed by a tensile zone Z, through which a tensile force acts on the fiber accumulation 34 and thus increases the spinning tension.
  • a swirl element is connected to the sieve belt 8, as in the previous exemplary embodiments.
  • the suction edge 23 is not limited to the shape shown. Suction edges are also possible, which have thrust and zero force ranges or tensile and zero force ranges.
  • Fig. 9 shows a variant of the invention, in which by Design of the suction insert 2 at the suction edge 23 causes a change in the thrust component in the fiber accumulation 34.
  • the fibers are fed onto the screen roller 1 by means of the fiber feed channel 3 and are collected and pre-turned on the suction edge 23 or the collecting line 13.
  • the suction edge 23 is curved in the direction of movement B of the screen roller 1.
  • the fiber accumulation 34 moves along the suction edge 23 in the direction of the withdrawal point of the fiber accumulation 34, which is determined by a pressure roller 51.
  • the fiber accumulation 34 gradually assumes the peripheral speed of the screen roller 1 during the movement along the suction edge 23.
  • the pressure roller 51 clamps the fiber accumulation between the pressure roller 51 and the screen roller 1 at a clamping point.
  • the fiber accumulation formed in this way is fed, for example, to a conventional air spinning device with injector nozzle 44 and swirl nozzle 45 after leaving the clamping point.
  • the desired yarn with the corresponding yarn quality is then produced in this air spinning device.
  • suction insert 2 is not limited to the shapes shown. Just like the shapes shown, all others fall Forms of the suction insert 2 under the scope of the invention, which lead to a fiber accumulation according to the invention by the method described.
  • slot edges can be used, which brings a thrust at the end of the fiber collection 34 and a tensile force into the fiber collection in the area of the transfer point of the fiber collection 34 to the swirl element 4.
  • 10 and 11 show typical hole patterns as used on the collecting surfaces.
  • the distance between the individual suction holes 12 is the smallest in the main orientation direction 11.
  • the distance to every other suction hole 12 away from the main orientation direction 11 is greater.
  • the angle ⁇ between the surface line 14 and the main orientation direction 11 can also be seen from this hole pattern.
  • the arrangement of the suction holes 12 shows a main orientation direction 11, in which the lateral distance of the suction holes 12 is less than the distance in the main orientation direction 11.
  • Such a hole pattern can be used on the collecting surface if it is ensured that the fibers due to the The fiber feed direction and the direction of movement of the collecting surface can only approach and lay down approximately in the direction of the main orientation direction 11.
  • the collecting line 13 or the suction edge 23 close with the surface line 14 or the radius 15, i. H. the perpendicular to the direction of movement an angle between ⁇ 20 °.
  • the invention relates not only to the variants shown, but also to any combination of the components shown with one another as well as devices with devices that are analogous to the fiber feeds, fiber draws and directions of rotation and movement shown.
  • a counter-contour which does not touch the fiber accumulation, can reduce the air consumption.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP19910102415 1990-03-09 1991-02-20 Spinning process and device for producing a yarn Withdrawn EP0447823A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4007607A DE4007607A1 (de) 1990-03-09 1990-03-09 Spinnverfahren und vorrichtung zur herstellung eines garnes
DE4007607 1990-03-09

Publications (2)

Publication Number Publication Date
EP0447823A2 true EP0447823A2 (fr) 1991-09-25
EP0447823A3 EP0447823A3 (en) 1991-11-21

Family

ID=6401866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910102415 Withdrawn EP0447823A3 (en) 1990-03-09 1991-02-20 Spinning process and device for producing a yarn

Country Status (3)

Country Link
US (2) US5241813A (fr)
EP (1) EP0447823A3 (fr)
DE (1) DE4007607A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0668944A1 (fr) * 1992-08-18 1995-08-30 JACOBSEN, Alan, Nicholas Appareil et procede ameliores de filature a bout libre

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19632742A1 (de) * 1996-08-14 1998-02-19 Fritz Stahlecker Spinnverfahren zum Herstellen eines Garnes
DE19634538A1 (de) * 1996-08-27 1998-03-05 Fritz Stahlecker Vorrichtung zum Offenend-Spinnen mit einer angetriebenen Saugwalze
AT407405B (de) * 1997-09-30 2001-03-26 Fehrer Textilmasch Vorrichtung zum bündeln einer verstreckten faserlunte
DE10141965A1 (de) * 2001-08-21 2003-03-06 Stahlecker Gmbh Wilhelm Verfahren zum Handhaben einer Spinnvorrichtung

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EP0205840A2 (fr) * 1985-06-18 1986-12-30 Schubert & Salzer Maschinenfabrik Aktiengesellschaft Procédé et dispositif de filature par friction par fibres libérées
GB2178451A (en) * 1985-07-26 1987-02-11 Vyzk Ustav Bavlnarsky Open-end spinning
EP0234620A2 (fr) * 1986-02-26 1987-09-02 SAVIO S.p.A. Elément rotatif de filature pour la filature à fibre libérée

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DE3330414A1 (de) * 1983-08-23 1985-03-14 Karl-Josef Dipl.-Ing. 4156 Willich Brockmanns Verfahren und vorrichtung zum aufbereiten der einer friktionsspinnmaschine zugefuehrten spinnfasern
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DE2660060C2 (de) * 1976-03-27 1985-09-05 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Verfahren zum Erzeugen eines Kernmantelfadens
DE2618865A1 (de) * 1976-04-29 1977-11-17 Hoechst Ag Open-end-spinnverfahren
DE3441495A1 (de) * 1984-11-13 1986-05-22 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt Offenend-spinnverfahren und vorrichtung zu seiner durchfuehrung
EP0205840A2 (fr) * 1985-06-18 1986-12-30 Schubert & Salzer Maschinenfabrik Aktiengesellschaft Procédé et dispositif de filature par friction par fibres libérées
GB2178451A (en) * 1985-07-26 1987-02-11 Vyzk Ustav Bavlnarsky Open-end spinning
EP0234620A2 (fr) * 1986-02-26 1987-09-02 SAVIO S.p.A. Elément rotatif de filature pour la filature à fibre libérée

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0668944A1 (fr) * 1992-08-18 1995-08-30 JACOBSEN, Alan, Nicholas Appareil et procede ameliores de filature a bout libre
EP0668944A4 (en) * 1992-08-18 1995-09-06 Alan Nicholas Jacobsen Improved method and apparatus for open end yarn spinning.

Also Published As

Publication number Publication date
US5241813A (en) 1993-09-07
DE4007607A1 (de) 1991-09-12
US5313777A (en) 1994-05-24
EP0447823A3 (en) 1991-11-21

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