EP0321011B1 - Twister device with rotary spiral for a winding carriage - Google Patents

Twister device with rotary spiral for a winding carriage Download PDF

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Publication number
EP0321011B1
EP0321011B1 EP88202687A EP88202687A EP0321011B1 EP 0321011 B1 EP0321011 B1 EP 0321011B1 EP 88202687 A EP88202687 A EP 88202687A EP 88202687 A EP88202687 A EP 88202687A EP 0321011 B1 EP0321011 B1 EP 0321011B1
Authority
EP
European Patent Office
Prior art keywords
sliver
spiral element
rotary
false twist
funnel
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
EP88202687A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0321011A1 (en
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 EP0321011A1 publication Critical patent/EP0321011A1/en
Application granted granted Critical
Publication of EP0321011B1 publication Critical patent/EP0321011B1/en
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
    • D01H7/923—Spinning or twisting arrangements for imparting transient twist, i.e. false twist by means of rotating devices

Definitions

  • This invention relates to a twister device with mobile spiral element for inserting a false twist into a sliver leaving 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 false twist device is driven reciprocatingly along a path of travel equal substantially to the desired length of the bobbin.
  • the sliver must be subjected to the collection tension essential for the formation of a compact bobbin, but said tension must remain sufficiently constant not to change the dimensional and quality characteristics of the sliver between the exit of the calender unit and the point at which the winding operation is carried out. 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 labour cost of such ergency assistance is a considerable factor in calculating the production costs.
  • EP-A-0 295 731 discloses a twister device with a mobile spiral element for a winding carriage for collecting a sliver onto cross-wound bobbins, wherein said mobile spiral element is coupled to an active twisting unit to undergo reciprocating to-and-fro movement integrally with a rotary funnel-type false twist element, arranged within said active twisting unit and wherein said mobile spiral element being disposed upstream of the false twist element, the two elements cooperating to wind a compacted and rounded sliver on the collection bobbin and to keep said sliver always subject to elastic compensation during its periodical variation between the intermediate collection points and the end collection points on said forming bobbin.
  • the object of the present invention is to provide an improved twister device of the last mentioned type, which is able to compensate the variation in distance between a fixed feed outlet and a mobile sliver guide subjected to to-and-fro movement, so as to obtain a collected sliver which is compact and round without suffering the aforesaid drawbacks.
  • a twister device is proposed having the features as defined in claim 1.
  • the rotary spiral element can be constructed of steel spring wire or another wear-resistant material. Said wire is wound in a substantially cylindrical shape with a pitch, diameter and number of turns dependent on the material to be worked. As it consists merely of a steel wire, the rotary spiral element according to the invention has minimum inertia and offers no substantial hindrance to the reciprocating movement of the overall twister device.
  • the rotary spiral element therefore acts essentially as a compensator for compensating the length differences and at the sliver entry end is of flattened form to guide the sliver, whereas at its exit end it is fixed to the rotary funnel-type twist element.
  • the rotary spiral inserts a large number of twists into the sliver to give that bond and compactness to the fibres required to make the sliver totally elastic under the tensioning action during cross-winding.
  • the rotary spiral element inserts in the sliver both a twist deriving from its spiral part and a twist deriving from its rotation. More specifically, the purpose of the rotary spiral element is to guide the sliver at the entry to the rotary funnel-type element while simultaneously giving the sliver a consistent number of twists which extend towards the calender unit and also implements the initial compacting and rounding stage prior to its entry into said rotary funnel-type false twist element.
  • the twists inserted into the sliver leaving the calender rolls by the rotary spiral element advantageously bind together the component fibres of the sliver, to enable it to be tensioned by elastic elongation, to perfectly compensate the distance variation without the danger of creating false draft.
  • the compensation and twist insertion are provided by simple means, and the lightness of the rotary spiral element results in the collection rate in the machine being substantially increased.
  • the combination of the rotary spiral element and the funnel-type false twist element is overall fairly light in weight, adaptable to the various machine types and considerably economical. Said combination enables very fragile slivers consisting for example of short fibres with poor adhesion to be worked, and in such cases enables breakages and continuity interruptions in the fibre aggregate to be prevented, and also prevents the fibres sliding on each other resulting in changes in cross-section which impair the sliver quality.
  • a preferred embodiment of the device of the present invention is described hereinafter by way of non-limiting example with reference to the single accompanying drawing, together with clarification of further constructional details and characteristics.
  • the accompanying drawing shows a diagrammatic side view of a twister and compensator device according to the invention cooperating upstream with the calender rolls through which the sliver leaves the gill box and cooperating downstream with 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
  • 10 is a ring with a lateral slot advantageously arranged for inserting the sliver 9.
  • Said ring is profiled internally with an annular surface of spherical profile converging in the feed direction of the sliver 9, which is guided into the rotary spiral element 3;
  • 3 is a rotary spiral element, in the form of a helical spring with one or more helixes, of positive inner diameter and with a turn pitch depending on the spinning machine and the material to be worked.
  • Said spiral element 3 has two ends, one of which is joined to the guide ring 10 and the other is fixed to the ring 11; 11 is a ring which enables the rotary spiral element 3 to either be rigidly fixed to the rotary funnel-type element 6; 6 is the rotary funnel-type element for inserting the false twist necessary to give the sliver 9 roundness and strength before its collection on the periphery of the forming bobbin 16: 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 rotary funnel-type element 6 to rotate about itself while caused by the reciprocating
  • the sliver, roving or fibre aggregate leaving the calender unit 1 is inserted into the guide ring 10 through the lateral slot and is conveyed through the rotary spiral element 3 and into the rotary funnel-type element 6 to be collected on the surface of the bobbin 16 rotating on the winding spindle 28.
  • the twist inserted both by the rotation of the spiral element 3 and by the friction along the inner surface of its 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
EP88202687A 1987-12-18 1988-11-25 Twister device with rotary spiral for a winding carriage Expired - Lifetime EP0321011B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2308187 1987-12-18
IT23081/87A IT1223525B (it) 1987-12-18 1987-12-18 Dispositivo torsionatore con spirale rotante per carro bobinatore

Publications (2)

Publication Number Publication Date
EP0321011A1 EP0321011A1 (en) 1989-06-21
EP0321011B1 true EP0321011B1 (en) 1993-01-27

Family

ID=11203568

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88202687A Expired - Lifetime EP0321011B1 (en) 1987-12-18 1988-11-25 Twister device with rotary spiral for a winding carriage

Country Status (5)

Country Link
EP (1) EP0321011B1 (enrdf_load_stackoverflow)
DE (1) DE3877926T2 (enrdf_load_stackoverflow)
ES (1) ES2039599T3 (enrdf_load_stackoverflow)
GR (1) GR3007075T3 (enrdf_load_stackoverflow)
IT (1) IT1223525B (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108374214B (zh) * 2018-04-26 2023-11-03 张维国 假捻器及其使用方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0295731A1 (en) * 1987-06-19 1988-12-21 SAVIO S.p.A. Twisting device for giving a false twisting to a textile fibre sliver

Family Cites Families (5)

* 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
BE659089A (enrdf_load_stackoverflow) * 1965-01-29
FR1502636A (fr) * 1966-01-21 1967-11-24 Schlumberger Cie N Perfectionnements aux entonnoirs tournants utilisés pour l'enroulage des rubans de fibres en bobines croisées
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0295731A1 (en) * 1987-06-19 1988-12-21 SAVIO S.p.A. Twisting device for giving a false twisting to a textile fibre sliver

Also Published As

Publication number Publication date
DE3877926D1 (de) 1993-03-11
DE3877926T2 (de) 1993-06-03
GR3007075T3 (enrdf_load_stackoverflow) 1993-07-30
ES2039599T3 (es) 1993-10-01
IT8723081A0 (it) 1987-12-18
EP0321011A1 (en) 1989-06-21
IT1223525B (it) 1990-09-19

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