EP0321034A1 - Elément spiral rotatif pour répartir la compensation de la tension et la fausse torsion dans une mèche textile - Google Patents

Elément spiral rotatif pour répartir la compensation de la tension et la fausse torsion dans une mèche textile Download PDF

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Publication number
EP0321034A1
EP0321034A1 EP88202830A EP88202830A EP0321034A1 EP 0321034 A1 EP0321034 A1 EP 0321034A1 EP 88202830 A EP88202830 A EP 88202830A EP 88202830 A EP88202830 A EP 88202830A EP 0321034 A1 EP0321034 A1 EP 0321034A1
Authority
EP
European Patent Office
Prior art keywords
sliver
yarn guide
spiral
winding
guide element
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.)
Granted
Application number
EP88202830A
Other languages
German (de)
English (en)
Other versions
EP0321034B1 (fr
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/fr
Application granted granted Critical
Publication of EP0321034B1 publication Critical patent/EP0321034B1/fr
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 rotary spiral element which operates as a yarn guide and as a compensator and twister element in depositing sliver cross-windings 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 is also subjected to a cyclic variation in distance between the fixed point of exit from the calendar 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 silver 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 object of the present invention is to provide a rotary spiral twister element for the winding carriage of a gill box which is able to guide the sliver while simultaneously compensating said distance variation by the insertion of a large number of twists which make it resistant and elastic during the entire cross-winding so that said rotary spiral element does not suffer from aforesaid drawbacks of known devices.
  • the applicant has designed, experimented with and perfected a rotary spiral element for inserting twist and compensation into textile fibre slivers, consisting 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 rotary 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 inserts a large number of twists deriving partly from the twisting action of its helix turns and partly from its rotation about itself.
  • the rotary spiral guides the sliver 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 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 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 improved tensioning element for a winding carriage comprising a yarn guide spiral which rotates rapidly about its axis while being moved transversely to-and-fro parallel to the axis of the drive roller. Said spiral yarn guide rotates in one direction and then in the other as a consequence of its linkage to the alternating direction of motion involved in the said transverse to-and-fro movement.
  • the spiral yarn guide comprises a spiral rotating in a single direction independently of the alternating direction of motion involved in the said transverse to-and-fro movement.
  • the spriral yarn guide element comprises helical turns constructed of tube of low weight so as to provide minimum inertia to the alternating motion and the association rotary movement, this being particularly useful for high collecting speeds.
  • the accompanying drawing shows a diagrammatic side view of a rotary spiral yarn guide element for inserting twist and providing elastic compensation, according to the invention, and also showing upstream the calender unit through which the sliver leaves the gill box, and downstream the cross-winding system for forming the sliver collection bobbin.
  • 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 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 the fibre and the weight of the sliver to be worked.
  • Said spiral 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 movement mechanism 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 movement mechanism 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 that which is new and ignores those elements or devices which are cooperative or complementary during operation, as these are of the known art.
  • the sliver, roving or fiber 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.
  • the twist inserted both by the rotation of the rotary spiral 3 and by the friction along the inner surface of the helix turns travels back rapidly and continuously as far as the rolls 7 and 8 to give the sliver that torsional compactness necessary to make it elastic under the alternate tensioning present in a cross-winding.
  • a preferred embodiment of the invention has been described herein, however the shape and dimensions of the parts can be changed, or the wire of the spiral can be other than circular in shape, such as oval, rectangular or the like, without leaving the scope of the present invention as claimed hereinafter

Landscapes

  • 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)
EP88202830A 1987-12-18 1988-12-09 Elément spiral rotatif pour répartir la compensation de la tension et la fausse torsion dans une mèche textile Expired - Lifetime EP0321034B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2308987 1987-12-18
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

Publications (2)

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

Family

ID=11203664

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88202830A Expired - Lifetime EP0321034B1 (fr) 1987-12-18 1988-12-09 Elément spiral rotatif pour répartir la compensation de la tension et la fausse torsion dans une mèche textile

Country Status (5)

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

Cited By (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 (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
EP0070814A1 (fr) * 1981-07-20 1983-01-26 Officine Savio S.p.A. Dispositif de compensation de la tension lors du bobinage dans les machines textiles
GB2104923A (en) * 1981-07-03 1983-03-16 Sant Andrea Novara Officine Sliver winder with traversing false twister

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1205058B (it) * 1987-06-19 1989-03-10 Savio Spa Dispositivo torsionatore per carro bobinatore

Patent Citations (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
GB2104923A (en) * 1981-07-03 1983-03-16 Sant Andrea Novara Officine Sliver winder with traversing false twister
EP0070814A1 (fr) * 1981-07-20 1983-01-26 Officine Savio S.p.A. Dispositif de compensation de la tension lors du bobinage dans les machines textiles

Cited By (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

Also Published As

Publication number Publication date
DE3877927D1 (de) 1993-03-11
EP0321034B1 (fr) 1993-01-27
DE3877927T2 (de) 1993-06-09
ES2039602T3 (es) 1993-10-01
IT8723089A0 (it) 1987-12-18
IT1223533B (it) 1990-09-19
GR3007076T3 (fr) 1993-07-30

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