US3685270A - System of spinning yarn - Google Patents

System of spinning yarn Download PDF

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Publication number
US3685270A
US3685270A US32205A US3685270DA US3685270A US 3685270 A US3685270 A US 3685270A US 32205 A US32205 A US 32205A US 3685270D A US3685270D A US 3685270DA US 3685270 A US3685270 A US 3685270A
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Prior art keywords
spinning
rollers
separating
roller
feed
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Expired - Lifetime
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US32205A
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English (en)
Inventor
Gerhard Bartling
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SKF GmbH
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SKF Kugellagerfabriken GmbH
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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
    • D01H4/30—Arrangements for separating slivers into fibres; Orienting or straightening fibres, e.g. using guide-rolls

Definitions

  • the feed mechanism comprises a pair of rollers or tapes for drawing the fiber
  • the separating mechanism comprises a roller and at least a counter roller, the roller and counter roller of the separating device being driven at substantially higher speed than the feed mechanism.
  • the present invention relates to apparatus for spinning yarn and in particular to apparatus for feeding and separating fiber slivers transported to a rotary spinning unit.
  • Conventional spinning apparatus comprises a spinning rotor defining a spinning chamber, mounted in a cavity in bearing housing.
  • the apparatus includes a feeding device and a separating device by which a web of sliver material is fed, separated and carried as individual fibers to the spinning chamber.
  • Common separating apparatus comprises a saw toothed combing roller, journaled for rotation in the bearing housing.
  • the bearing housing is provided with a drawing-off channel extending tangentially to the cylindrical housing cavity.
  • An air stream (generally of negative pressure) is caused to carry the individual fibers through the channel to the spinning chamber.
  • the circumference of the combing roller defines a narrow gap in combination with a wall portion of the cylindrical housing cavity immediately ahead of the entrance to the drawing-off channel.
  • the combining roller grips individual staple fibers of the sliver fed from the feeding device and separates them from the supplied fiber aggregation.
  • the spacing of the narrow gap is adjustable permitting staple fibers of a predetermined length to be readily released after they are intensively combed out. This is intended to prevent tearing of the fibers under the action of the combing roller.
  • the object of the present invention is the provision of improved devices of the general type described above that permits the fibers to be separated under conditions which do not injure them.
  • the separating system is provided having a driven separating roller and a least one counter roller.
  • the transporting velocity of the separating apparatus is maintained at many times the feed velocity of the associated feeding apparatus.
  • the individual staple fibers are separated from the sliver aggregation by being clamped between two rollers.
  • FIG. 1 is a longitudinal section of a first embodiment of a spinning unit equipped with a spinning chamber which is located releasably in the frame of a spinning machine and is equipped with a device for feeding and separating a sliver having a feeding device equipped with two feeding rollers and a separating device;
  • FIG. 2 is a section along the line 2-2 of FIG. 1;
  • FIG. 3 is a section along the line 3-3 of FIG. 1;
  • FIG. 4 is a top plan view of the spinning unit with the cover for the housing removed;
  • FIG. 5 is a longitudinal section of a second embodi- FIG. 7 is a section along the line 7-7 of FIG. 6;
  • FIGS is a top line view of the spinning unit according to FIG. 5 with the housing cover removed.
  • the spinning unit according to FIGS. 1-4 has a spinning rotor 10 enclosing a spinning chamber and rotatably mounted in a bearing housing 12.
  • the shaft of the spinning rotor is equipped with a drive pulley 14 which cooperates with a tangential belt 16' connected to the prime mover (not shown).
  • the construction of the spinning rotor is shown in greater detail in the copending application of G. Bartling Ser. No. 32,133 filed Apr. 27, 1970, now abandoned, which is incorporated herein by reference, and therefor it need not be described here in greater detail.
  • cavity 18 of the housing which receives the spinning rotor 10 may be enclosed by means of a cover plate 20, an annular gasket 22 aror trough of the spinning chamber.
  • the fibers are drawn in to the spinning rotor 10 by a radial blower comprising a part of the rotor.
  • An axial output channel 32 is provided in the retaining shaft 24 and is accessible at its inner end from the outside by way of a radial connecting channel 34.
  • a pair of driven drawing rollers 36 are located above the radial drawing channel 34 and withdraw the yarn 38 which is spun in the spinning chamber by way of the withdrawing channel 32.
  • -A broken thread detector ' is interposed between the drawing rollers 36 and the withdrawing channel 32.
  • the detector 40 has a sensing arm 42 which engages the yarn and which, when the yarn breaks, drops operating a circuit described in more detail below.
  • the bearing housing 12 is releasably fastened in a mounting support 44' arranged on a rail 46 of the frame of a spinning machine.
  • the rail 46 is angle shaped.
  • FIG. 6 is a section along the line 66 of FIG. 5;
  • rality of spinning units may be arranged on the rail 46 in a spaced row perpendicular to the plane of the device as seen in FIG. 1.
  • a feeding device 48 is arranged upstream from the spinning chamber 26 to supply the same with staple fibers and is followed by a separating device 50.
  • a supply of sliver 52 is fed to the separating device 50 by means of the feeding device 48, the separating device continuously resolving and separatingindividual staple fibers from the fiber aggregates of the sliver to be led, as shown in FIG. 4, by way of a channel 54 under the efiect of suction, to the spinning chamber 26.
  • the suction being produced by the spinning rotor in the manner described in the aforementioned patent application.
  • the feeding mechanism 48, as well as the separating mechanism 50 areequipped with respective pairs of rollers.
  • the axes of these pairs of rollers are parallel and are arranged in a common plane relatively to the spinning rotor in such a manner that the bearings of the roller pairs are arranged transversely to the axis of the spinning rotor substantially in a downward direction.
  • the feeding device 48 is provided with two driven rollers 56 and 58 while the separating mechanism has a driven rollers and an idling pressure rollers 62 (FIG. 4).
  • the two last mentioned rollers 60 and 62 and the one driven roller 56 of the feeding device are joumaled on a bearing element 64.
  • a drive shaft 66 is arranged in a bearing 68 on the bearing element 64.
  • the associated pressure rollers 62 are rotatably supported on a pivotally mounted arm 70 on the element 64,the arm 70 being biased by a torsion spring 72 in a direction towards and so as to cause the separating rollers to abuttingly engage the circumference of pressurerollers 62.
  • the separating rollers 60 may have a corrugated circumference whereas the pressure rollers 62 may be provided circumferentially with a rubber coating.
  • the pressure rollers 62 are pivotally joumaled on the arm 70 about a pin 74 by means of a trunnion 76 integral with the front walls of the rollers 62.
  • the feeding device 48 preferably is of the dual tape type in which a pair of tapes 78, 80 are trained respectively over each of the two rollers 58, 58.
  • a tape tensioning am 84 has a reversing pin 86 which acts on the inner face of the tapes for tensioning the same.
  • the tensioning arm 84 is pivotally mounted on a pin 88 arranged on the bearing element and is urged by a torsion spring 90 to pivot the tensioning arm away from the inner strand of the tape.
  • the other driven feed roller 58 is pivotally mounted on a bearing arm 94 by means of pins or trunnions 96, 98.
  • the arm 94 being pivotally mounted on a pin or shaft 92.
  • a torsion spring 99 biases the arm 94 in the direction towards the driven roller 56.
  • the second tape 80 is guided around the driven roller 58 and also around a tape holder 100 immediately ahead of the pair of rollers of the separating mechanism.
  • the inner strands of the tapes are aligned in parallel, to thus define a feeding field in which the staple fibers of the sliver to be processed are held substantially over the entire length until they are delivered to the feeding rollers of the separating mechanism.
  • the parts which belong to the driven side of the tape guiding arrangement namely, the bearing arm 94 with the roller 58, the tape holder 100 and the tape 80 are arranged on a carrier 102 which is arranged laterally of the bearing element 64 as is seen in FIGS. 2 and 3.
  • the lower end of the carrier 102 is pivotable about a shaft 104 fastened to the bearing element 64 against the restraint of a torsion pin 106.
  • the carrier 102 may be latched by means of a latching nose 108 to a detent formed by a screw.
  • the feeding mechanism 48 is preceded by fiber sliver guiding device which includes a guiding channel 112 provided within a body 114.
  • a densifier 116 of funnel I shape acts to reduce the space occupied by the sliver into a minimum.
  • the sliver 52 is fed, according to FIG. 1 from below upward and at right angles to the direction of feeding movement provided by the feeding mechanism 48.
  • the sliver 52 is diverted into the feed-.
  • the individual pairs of rollers may be driven by the same prime drive means, or
  • the driven shaft 56 for driving the feeding mechanism is secured against rotation on the roller shaft 124 which passes through the carrier as 'seen in FIG. 3 in the downward direction.
  • the lower end of the shaft carries a worm wheel which meshes with a worm 128 on a transmission shaft 130.
  • the transmission shaft.l30 is itself joumaled in the bearing element .64 and also on a bearing block 134 fastened to a bottom frame element 132 of the housing.
  • the transmission shaft is preferably driven by means of a worm wheel 136 which meshes with .a worm 1380f a drive shaft 140 which is parallel to the tangential belt 122.
  • the drive shaft is rotatably supported in a bearing block 142 on the machine frame.
  • An electromagnetic clutch 144 is interposed between the worm wheel 136- and the transmission shaft 130 proper.
  • the bearing element 64 is enveloped by a housing 146, the bottom portion 132 of which-has an entrance opening 148 for the sliver which is passed immediately behind'the entrance opening preferably through an initial funnel densifier 150 fixedly fastened on the housing.
  • the space between the densifier 150 and the sliver guide piece 114 is accessible through a flap 152 whereas the feeding mechanism and the separating mechanism are accessible through a cover 154 which is pivotally mounted on the cover plate 20.
  • the clutch 144 is electrically connected with the yarn breakdetector so that, for any reason the spun yarn drawn from the spinning chamber 26 should break and if the yarn run should be interrupted the clutch 144 is actuated and the transmission shaft 130 is thereby disconnected from the drive shaft 140.
  • the conveying of the sliver to the separating device is thereby interrupted while the separating device continues operating. In this manner staple fibers are prevented from reaching the spinning chamber and overcrowding is avoided.
  • FIGS. 5-8 The second embodiment shown in FIGS. 5-8 has the same, structural features as the spinning unit described above and the similar. elements of both units are designated with the same reference numerals. The difference between the two embodiments resides in the fact that a drafting or sliver drawing unit is arranged upstream from the feeding mechanism 48.
  • drafting mechanism 160 of this second embodiment advantageously permits resolution and separation of a sliver web without having to increase the rotary speed of the separating rollers 60 of the separating mechanism 50 to an extreme value.
  • the drafting mechanism forms a predrawing or stretching field which is interposed between the guide element 114 and the densifier 150.
  • the draft mechanism is provided with a pair of drawing rollers 162 and 164 which are associated in spaced relationship with a pair of predrawing rollers 166, 168.
  • the drawing roller 162 is fixed on the transmission shaft 130 which, for this purpose, passes through the portion of the bearing element 64 receiving the roller shaft 124.
  • the drawing-in roller 164 is rotatably supported on an arm 170 by means of pins 172 the arm being pivotally mounted on the carrier 102 about a pivot pin 173.
  • the torsion pin 174 urges the bearing arm 170 to pivot in the direction of the thus driven drawing-in roller 162 in order to produce the necessary clamping pressure for drawing in this sliver.
  • the predrawing roller 166 is rotatably supported on-a bearing element 178 which is slidably and fixably arranged in a guide slot 176 of the bearing element 64.
  • the associated predrawing roller 168 is pivotally mounted, analogously to-the drawing-in roller 164, on a bearing arm 184 whose pivot shaft is arranged by means of a bearing piece 184 and a guide slot 186 of the carrier 182 for adjustment parallel to the adjusting direction of the bearing piece 178.
  • a torsion pin 188 tends to pivot the bearing arm in a direction for producing clamping pressure between the predrawing rollers.
  • a shaft 190 drives the predrawing rollers 166 and is rotatably mounted in the bearing piece 178.
  • a spur gear 192 is fixedly fastened to the rear terminal portion of the shaft 190 which projects from the bearing piece 178.
  • the spur gear 192 meshes with an intermediate gear 196 mounted on a transmission shaft 130.
  • a drive 194 pivotally arranged on the transmission shaft 130.
  • An intermediate gear 196 itself being driven by means of a spur gear 198 is secured against rotation on the transmission shaft 130.
  • a suitable choice of the gear transmission ratio for predrafting of sliver, in the drafting mechanism, can be obtained as desired.
  • the pair of predrawing rollers must be oriented in their position relative to the drawing in rollers for which purpose the two bearing pieces 178 and 184 are adjustably mounted in the carrier or the bearing element.
  • the shown construction ensures that both the stretching element as well as the feeding mechanism are jointly stopped.
  • the present invention provides simple effective means having great advantages.
  • One such advantage arises from the fact the fiber aggregate which, in the ideal case, involves a flight of individual fibers in an air stream serially one behind the other.
  • a multiplicity of fibers is located substantially in a common plane at the transfer area or roller engaging line of the'device, with their ends directed in the direction of. transportation but spatially ofi set, many fibers are thus substantially simultaneously gripped by the rollers of the separating device.
  • fibers will also be considered to be separated when substantially'simultaneously individual fibers are withdrawn from the fiber aggregate and are carried to the spinning chamber without adhering to each other.
  • the difference in the transporting rate between the separating device and the feeding device can be. adjusted according to the density of the sliver which is to be separated.
  • the transporting velocity of the separating device is maintained at many times that of the feeding velocity of the feeding device. According to the'desired degree of separation the rate may be, for example, many thousand times the feeding velocity of the feeding device.
  • a ratio of rotary speeds of 1:1,000 for at least one roller of the feeding device and the paired rollers of the separating device will normally suffice when slivers are to be worked up whose staple fibers are not very densely arranged in the aggregate.
  • the process of fiber separation thus occurs without tearing or damaging frictional effects and thus preserves the fibers under optimum conditions.
  • separation of the fibers from a supply of fiber sliver is understood to mean a resolving or release of individual fibers out of staple fibers the greater the ratio of the rotary speeds.
  • a rotary speed ratio 115,000 or more be employed. It is possible to enhance the effect of the separating roller by giving them a certain surface configuration, for example, corrugated. In a preferred embodiment, however, the rollers of the separating device have a smooth surface.
  • the feeding device may be of different kinds and may consist of one or more feeding rollers.
  • the feeding device preferably is constituted by two rollers'enveloped by an endless belt.
  • a clamping surface is defined between the strands of the two belts which are located adjacent each other and move in the same direction. Such a clamping surface permits a particularly advantageous transportation of the supplied sliver without relative friction or tearing.
  • the feeding device and the separating device may be driven by a commonly controlled drive mechanism such as by a gear transmission responsive to an electric motor which permits easy change in the rotary speed of the rollers in a continuous and stepless manner.
  • a separate drive is provided for the separating rollers and the feeding rollers which provides particular advantage as the feeding of a sliver to the apparatus may be interrupted at any time. It is thus possible to stop a spinning unit equipped with the feed and separating apparatus of the invention without having to discontinue the operation of other concurrently operating spinning components.
  • a broken end detector is provided equipped with at least one drawing-in and one prestretching pair of rollers, is preferably arranged that the distance between the two roller pair s may be quickly changed.
  • the coordination of the individual rollers of the separating and feeding devices relative to the spinning chamber may be varied.
  • a particularly compact arrangement is achieved when the axis of the roller pairs .of the feed and separating devices are perpendicular to the axis of the spinning chamber.
  • the feeding device is equipped with a stretching unit it may be preferred to arrange the axis of the stretching rollers at right angles to the rollers of the feeding andseparating devices.
  • the jointly rotating rollers of the separating, feeding and stretching units are joumaled in a bearing body capable of being pivoted against the force of a spring. By pivoting this bearing body the aforementioned devices can be jointly opened or closed allowing convenient access for servicing or installation of a new sliver web.
  • the present invention is also advantageous in providing a coupling, controlled by the broken yarn detector, for driving the rollers of the feeding device and also of the stretching device, the coupling being interposed between the transmission shaft and the prime mover.
  • a system for feeding and separating fibers from a sliver web prior to spinning in a spinning chamber arranged to rotateabout its central axisina horizontal plane comprising, means for supplying sliver web, a
  • each of said feed and separating mechanisms having a driving roller and at least one counter roller, the axes of said driving and counter rollers lying in common planes respectively, vertical to the horizontal axis of rotation of said spinning chamber to move said fiber in an axial direction parallel to the axis of rotation of said spinning chamber, said rollers being located below the horizontal plane of the axis of rotation of said spinning chamber said driving rollers being mounted on rotatable supporting shafts extending downwardly in the vertical plane perpendicular to the horizontal plane of the axis of rotationof said spinning chamber, and means for driving each of said driven rollers. todrive said separating mechanism at a speed greater than said feed mechanism.
  • said feed mechanism includes an elongated tape entrained over each roller, and means for holding each tape extended means for controlling theoperation of said feed mechanism in response thereto.
  • the means for supplying said web includes drafting means comprises a pair of opposed rollers theaxes of which are arranged perpendicularto the axes of the separating and feeding rollers and parallel to the axis of rotation of said spinning chambers.
  • each said feed and supply mechanism includes a spur gear each of which meshes with a gear located on a common transmission shaft, secured to a source of prime motive power.
  • the system according to claim 5 including a frame, a rotating spinning unit comprising a chamber and baffle plate mounted on said frame, said feed, separating and drafting members being located within said body, said body being pivotally mounted on said

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US32205A 1969-05-05 1970-04-27 System of spinning yarn Expired - Lifetime US3685270A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691922876 DE1922876A1 (de) 1969-05-05 1969-05-05 Spinneinheit zum Verspinnen eines Faserbandes

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US3685270A true US3685270A (en) 1972-08-22

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US (1) US3685270A (de)
CH (1) CH504547A (de)
DE (1) DE1922876A1 (de)
FR (1) FR2042406B1 (de)
GB (1) GB1313401A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874154A (en) * 1971-12-11 1975-04-01 William Stahlecker Gmbh Fixedly disposed feeding and opening device for a spinning unit of an open-end spinning machine
US3927516A (en) * 1973-03-22 1975-12-23 Fritz Stahlecker Machine for continuous spinning by means of spinning rotors
US3988881A (en) * 1974-07-09 1976-11-02 Societe Alsacienne De Constructions Mecaniques De Mulhouse Device for feeding fibers to units for spinning freed fibers
US4698961A (en) * 1986-07-07 1987-10-13 Hollingsworth (U.K.) Ltd. Fibre-opening unit for an open-end spinning unit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2200686C3 (de) * 1972-01-07 1986-01-02 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt Offenend-Spinnmaschine
DE2524093C2 (de) * 1975-05-30 1986-04-24 Fritz 7347 Bad Überkingen Stahlecker Zuführ- und Auflöseeinrichtung für ein Spinnaggregat einer Offenend-Spinnmaschine

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2911783A (en) * 1959-11-10 Process and apparatus for spinning a yarn
US2926483A (en) * 1957-05-07 1960-03-01 Keeler Method of and to apparatus for use in concatenating fibrous material to form a spun yarn or strand
US3355869A (en) * 1966-02-24 1967-12-05 Vyzk Ustav Bavlnarsky Treating of fibrous materials
US3455097A (en) * 1967-06-01 1969-07-15 Vyrkumny Ustav Bavlnarsky Apparatus for spinning of fibrous material
US3462936A (en) * 1965-12-01 1969-08-26 Vyzk Ustav Bavlnarsky Stop motion for open end spinning machines
US3481129A (en) * 1966-11-08 1969-12-02 Tmm Research Ltd Open end spinning apparatus
US3492804A (en) * 1966-09-03 1970-02-03 Schubert & Salzer Maschinen Sensor-actuated strand clamping and strand return mechanism for spinning apparatus
US3523300A (en) * 1966-08-18 1970-08-04 Toray Industries Spinning method and apparatus for manufacturing yarn from textile fibers
US3535868A (en) * 1966-08-24 1970-10-27 Rieter Ag Maschf Apparatus for changing the twist of a yarn in a spinning machine

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2911783A (en) * 1959-11-10 Process and apparatus for spinning a yarn
US2926483A (en) * 1957-05-07 1960-03-01 Keeler Method of and to apparatus for use in concatenating fibrous material to form a spun yarn or strand
US3462936A (en) * 1965-12-01 1969-08-26 Vyzk Ustav Bavlnarsky Stop motion for open end spinning machines
US3355869A (en) * 1966-02-24 1967-12-05 Vyzk Ustav Bavlnarsky Treating of fibrous materials
US3523300A (en) * 1966-08-18 1970-08-04 Toray Industries Spinning method and apparatus for manufacturing yarn from textile fibers
US3535868A (en) * 1966-08-24 1970-10-27 Rieter Ag Maschf Apparatus for changing the twist of a yarn in a spinning machine
US3492804A (en) * 1966-09-03 1970-02-03 Schubert & Salzer Maschinen Sensor-actuated strand clamping and strand return mechanism for spinning apparatus
US3481129A (en) * 1966-11-08 1969-12-02 Tmm Research Ltd Open end spinning apparatus
US3455097A (en) * 1967-06-01 1969-07-15 Vyrkumny Ustav Bavlnarsky Apparatus for spinning of fibrous material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874154A (en) * 1971-12-11 1975-04-01 William Stahlecker Gmbh Fixedly disposed feeding and opening device for a spinning unit of an open-end spinning machine
US3927516A (en) * 1973-03-22 1975-12-23 Fritz Stahlecker Machine for continuous spinning by means of spinning rotors
US3988881A (en) * 1974-07-09 1976-11-02 Societe Alsacienne De Constructions Mecaniques De Mulhouse Device for feeding fibers to units for spinning freed fibers
US4698961A (en) * 1986-07-07 1987-10-13 Hollingsworth (U.K.) Ltd. Fibre-opening unit for an open-end spinning unit

Also Published As

Publication number Publication date
DE1922876A1 (de) 1970-11-19
FR2042406A1 (de) 1971-02-12
CH504547A (de) 1971-03-15
FR2042406B1 (de) 1974-07-12
GB1313401A (en) 1973-04-11

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