EP0295733B1 - Spiral element for supplying textile fibre slivers with compensation and false twist - Google Patents

Spiral element for supplying textile fibre slivers with compensation and false twist Download PDF

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Publication number
EP0295733B1
EP0295733B1 EP88201031A EP88201031A EP0295733B1 EP 0295733 B1 EP0295733 B1 EP 0295733B1 EP 88201031 A EP88201031 A EP 88201031A EP 88201031 A EP88201031 A EP 88201031A EP 0295733 B1 EP0295733 B1 EP 0295733B1
Authority
EP
European Patent Office
Prior art keywords
sliver
spiral element
bobbin
winding
outlet
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
EP88201031A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0295733A1 (en
Inventor
Sandro Sartoni
Eraldo Minguzzi
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 EP0295733A1 publication Critical patent/EP0295733A1/en
Application granted granted Critical
Publication of EP0295733B1 publication Critical patent/EP0295733B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/28—Traversing devices; Package-shaping 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
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/006—Traversing guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/12—Tubes
    • 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

  • the present invention relates to a twisting and compensating device suitable for guiding a textile fibre sliver between the outlet calender of a drawing frame and a winding unit.
  • sliver will be uniformly used in order to indifferently indicate both a roving of textile fibres, or a sliver of textile fibres, or, anyway, an aggregate of textile fibres.
  • the bobbin On a drawing frame on which the sliver is collected on bobbins of a traditional type, the bobbin is produced by winding the sliver around an idle roll, driven to revolve by one or more slotted rolls, by means of a false twisting device which gives the sliver roundness and mechanical strength, and maintains the individuality thereof during the subsequent unwinding process.
  • the winding should be carried out with the fibres of the sliver being kept as condensed as possible, in order that the mutual cohesion between the fibres prevents false drawings from occuring over the length of sliver running from the drawing frame outlet to the surface of the bobbin under way of formation.
  • the sliver leaving the outlet calender is fragile owing to the fact that the textile fibres which constitute it are short, or are often connected with a low mutual cohesion degree.
  • the sliver is continuously subject to a pendular change in distance between the stationary outlet point from the outlet calender of the drawing frame, to the movable sliver guide driven to reciprocate parallel to the axis of the bobbin under way of formation. Changes in the distances during the collection step must give the sliver such tension values, which will not cause modifications to occur in size and quality characteristics of the same sliver between the outlet point from the outlet calender, and the point wherein the winding operation is carried out.
  • US-A-3,670,978 proposes, e.g., to make the sliver run inside a ring constituting an intermediate guide, installed, in a movable way, between the point of outlet from the outlet calender of the drawing frame and the bobbin winding unit, in such a way that the total of the respective distances of said ring relatively to the outlet from the outlet calender and to the sliver guide remains always constant.
  • several systems have already been proposed and implemented, which envisage, e.g., articulated toggle-levers, or the like, capable of realizing the desired kinematic system.
  • EP-A-0 070 814 discloses a device for compensating the variable distance between the slider outlet point from the drawing frame and the movable point in which the winding operation takes place.
  • an entry guide ring, a spiral element and a condenser sleeve are provided, wherein the centre of the helical windings of the spiral element, of the guide ring and of the inner surface of the condenser sleeve are disposed along an arc-shaped curve having its bending centre opposite to the bending centre of the winding of the sliver on the bobbin relatively to the trajectory along which the sliver is running.
  • the entry guide ring consists or closed coils of the spiral element and is secured to the drawing frame at the exit of the outlet calender.
  • the outlet end of the spiral element is secured to the inlet of a revolving condenser sleeve borne by the bobbin winding carriage.
  • the purpose of the present invention is to improve this last mentioned device in order to supply the sliver leaving the outlet calender of the drawing frame with an effective false twist, compacting the fibres with one another and making the sliver strong enough for the cross-winding operation.
  • the spiral element of the device can be constituted by a wire or a tube made from spring-steel or another wear-resistant material, helically wound with a pitch and with a number of turns which depend on the type and weight of the textile fibre sliver to be processe .
  • the device has the very small inertia as necessary in order not to substantially apply a burden to the bobbin winding carriage, together with which the whole device is movable during its reciprocating motion.
  • the spiral element gives twists to the sliver, supplying it with such a bond strength and such a compactness between the fibres, as to render it totally elastic and capable of supporting the necessary tension to be applied for performing the cross-winding operation.
  • the spiral element performs the task of guiding the sliver to the surface of the bobbin under way of formation, with simultaneously supplying the same sliver with a twist in a predetermined direction running towards the outlet calender.
  • a twist by running along the entire length of the sliver, arrives up to the outlet point from the outlet calender, and is more concentrated along those sliver portions wherein the cross-section surface area is smaller, thus compensating for their lower strength relatively to the other sliver portions, which have a larger cross-section surface-area.
  • the twist given by means of the spiral element to the sliver when this latter leaves the outlet calender, keeps advantageously mutually bound the fibres which compose the same sliver, making it possible said sliver to be put under tension, in order to elastically extend it, realizing a perfect compensation for the change in distance, with no risk of formation of false drawings. Thanks to the simple structure and to the low weight of the spiral element, the bobbin winding speed can be substantially increased on the machine, and the cost of the same machine is decreased to a considerable extent.
  • the helical windings of the spiral element by being prearranged along an arc-shaped curve, whose bending centre is opposite to the bending centre of the winding of the sliver on the bobbin relatively to the trajectory along which the sliver under way of collection runs, contribute to considerably improve the twisting of the sliver and to perfectly round it.
  • the inner diameter of the helical windings of the spiral element is positive and, substantially constant.
  • the inner surface of the condenser sleeve has a spherical outline converging in the direction of collection of the sliver, in order to gradually compact the sliver before it is collected on the surface of the bobbin under way of formation.
  • the inner surface of the guide ring has a substantially spherical outline.
  • the spiral element is provided with two ends, with one of said ends being fastened to anchoring elements connected to the reciprocating bobbin winding carriage, and the other end being fastened to the entry guide ring.
  • 2 is a schematic outline of the drawing frame, or of a derived machine
  • 3 is the outlet calender, which acts as the means for feeding the sliver leaving the drawing frame 2
  • 4 is the pressure roll of the outlet calender, which, together with the roll 5, continuously extract from the drawing area the fibre sliver 6
  • 6 is the sliver of textile fibres substantially constituted by an aggregate of a more or less large number of textile fibres of various length
  • 8 is a entry guide ring with a side slot.
  • Said ring is given an inner ring surface with a substantially spherical outline in order to correctly guide the sliver into the interior of the spiral element 10;
  • 10 is a spiral element with a plurality of helical windings not mutually coaxial, but predisposed along an arc-shaped curve 16 whose bending centre is opposite to the bending centre of the winding of the sliver 6 on the bobbin 30 relatively to the trajectory along which the same sliver 6 runs;
  • 7 is the initial portion of the spiral element 10 wherein the fibres of the entering sliver 6 exert a higher pressure, due to the bent arrangement of the helical windings according to the axis 16, onto the intrados 11 of the inner surface of said spiral element 10, which is characterized by an inner positive diameter;
  • 9 is the end portion of the spiral element 10, wherein the fibres of the exiting slive
  • the sliver, or roving, or aggregate of fibres 6 leaving the outlet calender 3 is entered into the guide ring 8 through the side slot, not shown in the figures, as being per se known,and is conveyed,through the spiral element 10 and the condenser sleeve 12 in order to be collected on the periphery of the bobbin 30 under way of formation revolving on the winding spindle 28.
  • the shape, the ratios and the size of the parts may be changed;
  • the wire which constitutes the spiral element 10 may be of a different suitable material;
  • the anchoring elements 14 and 18 may be given a different shape, or may be mounted in a different way, without thereby departing from the scope of the solution as proposed by the present invention, as claimed in the hereto appended claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Treatment Of Fiber Materials (AREA)
EP88201031A 1987-06-19 1988-05-20 Spiral element for supplying textile fibre slivers with compensation and false twist Expired - Lifetime EP0295733B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT20960/87A IT1205059B (it) 1987-06-19 1987-06-19 Elemento a spirale per impartire compensazione e falsa torsione ai nastri di fibre tessili
IT2096087 1987-06-19

Publications (2)

Publication Number Publication Date
EP0295733A1 EP0295733A1 (en) 1988-12-21
EP0295733B1 true EP0295733B1 (en) 1992-03-04

Family

ID=11174657

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88201031A Expired - Lifetime EP0295733B1 (en) 1987-06-19 1988-05-20 Spiral element for supplying textile fibre slivers with compensation and false twist

Country Status (5)

Country Link
EP (1) EP0295733B1 (it)
DE (1) DE3868704D1 (it)
ES (1) ES2031580T3 (it)
GR (1) GR3004135T3 (it)
IT (1) IT1205059B (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106429619A (zh) * 2016-10-10 2017-02-22 巢湖市金业电工机械有限公司 新型可调复绕机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH427589A (de) * 1964-03-09 1966-12-31 Reiter Michael Beweglicher Band- oder Vorgarnführer zum Herstellen von Kreuzwickeln
US3670978A (en) * 1970-10-02 1972-06-20 Warner Swasey Co Compensator device
AU8554382A (en) * 1981-07-20 1983-01-27 Officine Savio S.P.A. Compensator device
DD255054A3 (de) * 1985-08-29 1988-03-23 Karl Marx Stadt Tech Hochschul Abzugsduese fuer vorspinn- und spinneinrichtungen

Also Published As

Publication number Publication date
DE3868704D1 (de) 1992-04-09
IT8720960A0 (it) 1987-06-19
EP0295733A1 (en) 1988-12-21
IT1205059B (it) 1989-03-10
ES2031580T3 (es) 1992-12-16
GR3004135T3 (it) 1993-03-31

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