EP0321034B1 - Drehbares Spiralelement zur Erzeugung des Fadenspannungsausgleichs und des falschdrehens in einem textilen Faserband - Google Patents

Drehbares Spiralelement zur Erzeugung des Fadenspannungsausgleichs und des falschdrehens in einem textilen Faserband Download PDF

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Publication number
EP0321034B1
EP0321034B1 EP88202830A EP88202830A EP0321034B1 EP 0321034 B1 EP0321034 B1 EP 0321034B1 EP 88202830 A EP88202830 A EP 88202830A EP 88202830 A EP88202830 A EP 88202830A EP 0321034 B1 EP0321034 B1 EP 0321034B1
Authority
EP
European Patent Office
Prior art keywords
sliver
spiral element
bush
winding
bobbin
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 - Lifetime
Application number
EP88202830A
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English (en)
French (fr)
Other versions
EP0321034A1 (de
Inventor
Sandro Sartoni
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.)
Savio SpA
Savio Macchine Tessili SpA
Original Assignee
Savio SpA
Savio Macchine Tessili SpA
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 Savio SpA, Savio Macchine Tessili SpA filed Critical Savio SpA
Publication of EP0321034A1 publication Critical patent/EP0321034A1/de
Application granted granted Critical
Publication of EP0321034B1 publication Critical patent/EP0321034B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/92—Spinning or twisting arrangements for imparting transient twist, i.e. false twist
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/005—Means compensating the yarn tension in relation with its moving due to traversing arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments
    • B65H2701/311—Slivers

Definitions

  • This invention relates to a device providing compensation and false twist to a sliver and for depositing sliver in the form of cross-winding on a forming bobbin by means of a winding carriage in a gill box or derived machine.
  • sliver will be used throughout to indicate a textile fibre roving, a textile fibre sliver or any other aggregate of textile fibres.
  • the package is built up by winding the sliver on an idle roller, rotated by one or more fluted rollers, by means of a false twist device arranged to give the sliver roundness and strength and to allow individuality in subsequent unwinding.
  • the sliver in being conveyed between the exit calender unit of the gill box and the winding system must be subjected to the necessary collection tension to form a compact bobbin.
  • the winding must therefore be effected with the sliver fibres as condensed as possible so that the cohesion between the fibres does not allow false draft to arise in that part of the sliver between its exit from the gill box and its deposition on the surface of the forming bobbin.
  • the sliver leaving the calender unit is often fragile, as its constituent fibres are short or held together with little twist.
  • the sliver is also subjected to a cyclic variation in distance between the fixed point of exit from the calender unit of the gill box and the mobile winding yarn guide driven with a to-and-fro movement along the forming bobbin.
  • This variation in the collection distance must not result in a sliver tension which changes the dimensional and quality characteristics of the sliver between the calender exit and the point in which the winding operation occurs.
  • Relatively large tension variations could also lead to sliver breakage. It is also clear that a breakage of this kind interrupts the production process and requires the assistance of service personnel.
  • the device described in this document comprises at least a twisting spiral element, and an active-twisting element constituted by a revolving funnel, with the first element being positioned upstream the second one, with both elements cooperating in order to wind the compact, rounded sliver on the collecting bobbin and to keep the sliver always subject to an elastic compensation for the periodic changes in length of the distance between the intermediate winding points and the end winding points of the bobbin under formation.
  • This device works well compared with devices previously proposed in the art, however its operation could be improved.
  • the object of the present invention is to provide an improved device of the last mentioned type which is able to guide the sliver on the surface of the forming bobbin, while simultaneously compensating said distance variation by the insertion of a large number of twists which make the sliver resistant and elastic during the entire cross-winding so that the spiral element of the device does not suffer from the aforesaid drawbacks.
  • a device is proposed having the features as defined in claim 1. Further preferred features of the device are defined in the subclaims.
  • the spiral element of the device consists of a tube or wire of spring steel or other wear-resistant material wound helically with its pitch and number of turns dependent on the type and weight of the material to be worked.
  • the spiral element is simply a steel wire or tube, it has minimum inertia and therefore does not substantially affect the rapid movement reversals of the winding carriage.
  • the rotary spiral element inserts a large number of twists deriving partly from the twisting action of its helix turns and partly from its rotation about itself. This provides the necessary binding and compactness to the sliver fibres to ensure that the sliver acts elastically when under tension during the cross-winding operation.
  • the rotary spiral guides the sliver up to its collection on the surface of the forming bobbin, while simultaneously giving the sliver a twist extending in direction back to the calender unit.
  • Said twist which extends along the portion upstream of the spiral element as far as the exit from the calender unit, is more concentrated along those sliver portions of lesser cross-section, so making up for their lesser strength than the other portions of greater cross-section.
  • this makes the strength uniform along the entire sliver and eliminates portions of low torsional strength which can easily undergo breakage to result in interruption to the production process, with some of the aforesaid consequences.
  • the twist inserted into the sliver at its exit from the calender unit by means of the rotary spiral element therefore advantageously keeps the component fibres of the sliver bound together and enables it to be tensioned by elastic elongation to provide perfect compensation for the distance variation without the danger of creating false draft.
  • the machine collection rate can be substantially increased and the machine cost considerably reduced.
  • the rotation of the spiral element about itself contributes to substantial improvement in the twist of the collected sliver and results in its perfect roundness.
  • rotating the spiral yarn guide element about its axis results in twist which is propagated in a uniformly distributed manner to consequently provide consistency to the cross-section of the fibre sliver under continuous winding, so eliminating so-called "marrying", ie the adhesion together of flat fibres to create imperfections during the next production process stage involving the unwinding of the bobbin.
  • FIG. 2 is a dashed line schematically indicating the gill box or derived machine
  • 1 is the calender unit operating as a feed means for the sliver leaving the gill box 2
  • 7 is the presser roll of the calender unit 1, which together with the roll 8 continuously extracts the fibre sliver 9 from the drafting zone
  • 9 is the textile fibre sliver consisting substantially of a more or less numerous aggregate of textile fibres of varying length
  • 3 is a rotary spiral element in the form of a helical spring with one or more helixes, having an inner diameter which is positive, or in the limit negative, and with a turn pitch depending on the type of fibre and the weight of the sliver to be worked.
  • Said spiral element 3 has two ends, one of which is joined to the rotary bush 6 and the other is fixed to the condensing bush 14; 19 is the plate for connecting and supporting the device of the present invention to and on the reciprocating winding carriage 20 which is guided to move parallel to the axis of the forming bobbin 16; 24 is the bush slidable along the cylindrical guide bar 22 positioned parallel to the axis 30 of the drive roller 32 for the forming bobbin 16; 26 is the profiled support plate for the entire device, and driven with reciprocating motion along a transverse travel path substantially equal to the desired axial length of the bobbin 16; 4 is the bearing assembly allowing the bush element 6 to rotate about itself while caused by the reciprocating carriage 20 to continuously move to-and-fro; 5 is the non-rotating outer casing of the element 6; 18 is the suitably shaped grooved pulley which by the action of a round belt 12 or similar element and with the cooperation of the backing surface or guide 15 generates the rotary movement of the element 6 by deriving it from
  • the operating description given hereinafter with reference to the said figure relates in particular to the device of the invention, whereas those elements or devices which are cooperative or complementary during operation are not described, as these are of the known art.
  • the sliver, roving or fibre aggregate leaving the calender unit 1 is inserted into the spiral 3 along its axis and is conveyed through the condensing bush 14 to be collected on the periphery of the bobbin 16 rotating on the winding spindle 28.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)

Claims (4)

  1. Vorrichtung zur Erzeugung eines Spannungsausgleichs und einer Falschdrehung in einem die Kalandereinheit (1) einer Gillbox (2) verlassenden Spinnband (9) und zur Ablage des Spinnbands (9) in Form einer Kreuzwicklung auf einer sich aufbauenden Spule (16) mittels eines Bewicklungsschlittens (19, 20), der in Querrichtung parallel zur Achse (30) der Antriebsrolle (32) für die sich aufbauende Spule (16) hin und her bewegt wird, wobei die Vorrichtung ein mit dem Bewicklungsschlitten (19, 20) verbundenes und auf ihm abgestütztes Gehäuse (5), eine mittels einer Lageranordnung (4) drehbar in dem Gehäuse (5) abgestützte Buchse (6), Mittel (12, 15) zum Drehen der Buchse (6), und ein Spiralelement (3) mit zwei Enden aufweist, von denen eines mit der Buchse (6) verbunden und das andere an einer Verdichtungsbuchse (14) befestigt ist, wobei das Spinnband (9) durch das Spiralelement (3) und die Verdichtungsbuchse (14) auf die Oberfläche der sich aufbauenden Spule (16) geleitet wird, während dem Spinnband (9) gleichzeitig eine sich rückwärts zur Kalandereinheit (1) erstreckende Verdrillung mitgegeben wird.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Spiralelement (3) sich als Folge seiner Kopplung an die wechselnde Bewegungsrichtung, die sich aus der Hin- und Herbewegung des Bewicklungsschlittens (19, 20) in Querrichtung ergibt, in eine Richtung und darauf in die andere dreht.
  3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Spiralelement (3) sich unabhängig von der wechselnden Bewegungsrichtung, die sich aus der Hin- und Kerbewegung des Bewicklungsschlittens (19, 20) in Querrichtung ergibt, in einer einzigen Richtung dreht.
  4. Vorrichtung nach Anspruch 1 und einem der folgenden Ansprüche, dadurch gekennzeichnet, daß die schraubenförmigen Windungen des Spiralelements (3) als Rohr oder mit geringem Gewicht ausgeführt sind, um der wechselnden Bewegung und der zugeordneten Drehbewegung bei hohen Sammelgeschwindigkeiten niedrigste Trägheitskräfte entgegenzusetzen.
EP88202830A 1987-12-18 1988-12-09 Drehbares Spiralelement zur Erzeugung des Fadenspannungsausgleichs und des falschdrehens in einem textilen Faserband Expired - Lifetime EP0321034B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT23089/87A IT1223533B (it) 1987-12-18 1987-12-18 Elemento a spirale rotante per impartire compensazione e falsa torsione ai nastri di fibre tessili
IT2308987 1987-12-18

Publications (2)

Publication Number Publication Date
EP0321034A1 EP0321034A1 (de) 1989-06-21
EP0321034B1 true EP0321034B1 (de) 1993-01-27

Family

ID=11203664

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88202830A Expired - Lifetime EP0321034B1 (de) 1987-12-18 1988-12-09 Drehbares Spiralelement zur Erzeugung des Fadenspannungsausgleichs und des falschdrehens in einem textilen Faserband

Country Status (5)

Country Link
EP (1) EP0321034B1 (de)
DE (1) DE3877927T2 (de)
ES (1) ES2039602T3 (de)
GR (1) GR3007076T3 (de)
IT (1) IT1223533B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10306475A1 (de) * 2003-02-14 2004-08-26 Deutsche Institute für Textil- und Faserforschung Fadenführervorrichtung für Ringspindel

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0295731A1 (de) * 1987-06-19 1988-12-21 SAVIO S.p.A. Vorrichtung zur Erteilung eines Falschdralles für ein Textilfaserband

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3670978A (en) * 1970-10-02 1972-06-20 Warner Swasey Co Compensator device
IT8153415V0 (it) * 1981-07-03 1981-07-03 Sant Andrea Novara Officine Stiratoio monotesta intersectingcon uscita in bobina e con torsiona tore guidanastro ad elica
AU8554382A (en) * 1981-07-20 1983-01-27 Officine Savio S.P.A. Compensator device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0295731A1 (de) * 1987-06-19 1988-12-21 SAVIO S.p.A. Vorrichtung zur Erteilung eines Falschdralles für ein Textilfaserband

Also Published As

Publication number Publication date
IT1223533B (it) 1990-09-19
IT8723089A0 (it) 1987-12-18
EP0321034A1 (de) 1989-06-21
ES2039602T3 (es) 1993-10-01
DE3877927D1 (de) 1993-03-11
GR3007076T3 (de) 1993-07-30
DE3877927T2 (de) 1993-06-09

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