EP0616059A1 - Verfahren und Vorrichtung zum Strecken, durch Falschzwirnen, Textil-Faserstrangen - Google Patents

Verfahren und Vorrichtung zum Strecken, durch Falschzwirnen, Textil-Faserstrangen Download PDF

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Publication number
EP0616059A1
EP0616059A1 EP94830114A EP94830114A EP0616059A1 EP 0616059 A1 EP0616059 A1 EP 0616059A1 EP 94830114 A EP94830114 A EP 94830114A EP 94830114 A EP94830114 A EP 94830114A EP 0616059 A1 EP0616059 A1 EP 0616059A1
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EP
European Patent Office
Prior art keywords
group
false twist
stretching
line
axis
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.)
Withdrawn
Application number
EP94830114A
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English (en)
French (fr)
Inventor
Ida Petracchi
Iolanda Bonacchi
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0616059A1 publication Critical patent/EP0616059A1/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/04—Devices for imparting false twist
    • D02G1/06—Spindles

Definitions

  • the invention relates to methods and apparatus for drawing in wicking textile fibers, which must be stretched and twisted at the same time, in order to obtain an elongation of the wicking material and to regulate the quantity of fibers per unit length of the material to be sent to the next spinning phase.
  • Apparatuses of this kind are indicated as devices for stretching and false twist (provisional twist), and currently they are made with a system of production of twists which are propagated from the device of false twist in the material, in the opposite direction to its advancement and therefore towards the system or group for feeding the wick material, which is distant from the drawing and false twisting device.
  • a first object of the invention is a method for drawing with false twist of woven textile fibers, delivered from the feeding system remote from the drawing and false twisting device; according to the invention, the line of material between said feed system and said device, is subjected, in position adjacent to said device, to a rotational drive, and consequently the material describes a surface of revolution with a balloon ; one thus obtains an immediate intervention of the false twist beforehand in the thinner lines which appear even on the hardly fed material; by this, the weaker zones are quickly excluded and there is the possibility of improving the regularity of the finished yarn and also increasing the drawing.
  • the material can be rotated by the effect of contact with a surface distant from the axis of rotation of the stretching and false twisting device. This surface is advantageously as close as possible to the active members of the stretching and false twisting device, to facilitate the setting of the material.
  • the stretching and false torsion device comprises a surface as a function of a wire guide off-center with respect to the axis of rotation, in order to impose on the material a rotational driving effect, in upstream of the active organs of the device which are responsible for taking the wire; in addition, inside the device, a large cavity is formed to avoid or limit the contact of the material with surfaces of the organs that make up the device, in the line where the material forms the balloon as a result of its rotational drive.
  • FIGS. 1 and 2 with (1) is generically indicated the system for feeding the wick-shaped material; this system comprises a cylinder (1A) actuated in rotation, and a second cylinder (1B) which can simply be a pressure roller, capable of turning by driving the cylinder (1A); Feeding systems of this kind are generally called feeding rolls used for feeding wicking textile materials, which must then be stretched to obtain the finished yarn. For stretching it is necessary to impose on the material a temporary torsional effect, that is to say of false torsion, which is obtained by means of a group or device of stretching and false torsion, generically indicated with ( 3) in FIG.
  • the group or device (3) comprises a support (5), which, by means of ball bearings (7) supports a rotor (9) and this rotor by means of ball bearings (10) supports a second rotor (12 ), the two rotors (9) and (12) are coaxial and capable of rotating between them and at different speeds - for the purposes then indicated - which are imposed on each of them by means of circumferential actuating surfaces in the form track or toothed pulleys for toothed belts, or equally the two rotors can be actuated in an equivalent manner and different from that indicated, in any case positive.
  • the rotor (12) forms an inner track (12B) coaxial with the axis of rotation common to the two rotors.
  • the inner rotor (9) supports an off-center pivot (14) parallel to the axis of rotation of the two rotors, on which pivot by means of ball bearings (16) is mounted a roller (18) capable of unwinding on the surface of the track (12B), with a speed which depends on the difference in rotational speed imposed on the two rotors (9) and (12).
  • the track (12B) can be supported by a ring (12C) of high elastic flexibility.
  • the rotor (9) has a large cavity (9C) which, asymmetrically downwards, narrows in the form of a hopper until it forms a hole (9F) decentered by relative to the axis of rotation X - X of the two rotors (9) and (12); the asymmetrical conformation of the cavity (9C) forms an internal projection (9G), which reaches the hole (9F) and forms the core for the said pivot (14); a lower appendage (9S) partially surrounds with its lower end the roller (18) to constitute a convex external surface capable of allowing the progression of the material along a path "M" which develops in addition to the line "T" of the system of 'feed (1) to group (3).
  • the material of the line “T” is deflected with respect to the axis of rotation X -X of the lower terminal deformation (9G) of the cavity (9C), to reach the hole (9F) and from here the material along the path “M”, shaves the outer surface of the projection (9S) and enters point “C” between the track (12B) and the roller (18) to be driven in rotation, moved forward and stretched to join the line "M1" successive at point "C" of contact, that is to say of grip or pinching between the track (12B) and the roller (18) up to the wire guide (20), after which continuation to the next spinning phase on the continuous spinning, or equivalent trade.
  • the hole (9F) is off-center with respect to the axis of rotation X - X and this causes a drive - along a circumferential trajectory concentric with the axis X - X - of the line "T" of material between the feeding system (1) and the group (3) of stretching and false twist.
  • the line "T" of material receives a rotational driving effect around the axis XX and a centrifugal expansion effect which brings the material to be subjected to (temporary) twist along the whole line "T", depending precisely on the number of turns of the rotor (9) and of the off-center wire guide which consists of the hole (9F) with the help of the projection (9G).
  • the false torsion generated by the false torsion device can reach the material not only by the effect of the progressive propagation which leaves the group of false torsion and stretching, but also and especially taking advantage of the circumferential rotary effect created by the balloon, which privileges and facilitates the spontaneous search for thin places and allows in such a way to immediately concentrate there and in preponderance the quantity of false twist necessary.
  • the line "T” of material is free to form a balloon by effect of the offset rotation of the hole (9F) and the projection (9G) around the axis of rotation X - X.
  • said cavity can be developed predominantly along a radius, as shown in the indicative line with (309C) in FIG. 2.
  • the size of the cavity (9C) (or 309C) allows a free lateral movement of the line "T” for the formation of the balloon without practically contact and friction of the line "T” with the surfaces of the rotor (9) and particular of the cavity (9C), which otherwise could adversely affect the above-mentioned advantages.
  • the variation compared to the execution of FIGS. 1 and 2 consists in the formation of an outlet orifice (9P) in substitution for the hole (9F), which orifice (9P) is developed by arc around the projection (9S ) already defined above and which partially surrounds the roller (18).
  • the outlet (9P) is developed so as to result with its own more internal surface always distant from the axis of rotation X - X, this is why the line "T" of material always results off-center in correspondence of the rotor (9) and therefore always driven in rotation to form the long ball known as the "T" trajectory.
  • the large outlet opening (9P) with roughly circumferential profile allows the approach of the wire to the gripping or pinching point, because it is planned to use the point of contrast and deflection at the end of the orifice (9P), after which the wire - which is now very close to the pinching point - comes easily seized from the track and roller pair, as soon as the device begins to rotate.
  • the casing (9S) remains only the function of preventing the winding of the wire on the roller (18), or small cylinder, and possibly that of continuous cleaning of the roller, if provision has been made for insertion into the surface.
  • the upper part of the small cylinder (18) is housed in the central body (9), to avoid as much as possible the possible infiltration of stray fibers, and also of the wick itself.
  • the central body (9) comes extended at (9K) inside the track (12B).
  • the false twist group (23), equivalent to that (3), is of the type which comprises a rotor (29) rotates along the axis X - X, and with a cavity (29C) in which is mounted a pair of rollers (31,33) with the axes located on the same plane transverse and orthogonal to the axis X - X and offset in a way that the area (and in theory the line) of contact between the rollers (31,33) is displaced with respect to the axis X - X in a manner analogous to how the hole (9F) of the solution of Figures 1 and 2 is displaced.
  • rotor (29) is rotationally controlled in a manner analogous to rotor (9) and a suitable transmission system (of an already known type) is provided for actuating the two rollers (31,33) in reverse rotation to determine a pulling effect, therefore stretching of the material of the line "T” down between the contact line between the two rollers (31,33).
  • the material of the line "T” immediately above the rollers is guided by a thread guide system delimited by two walls (35,37) supported by the rotor (29) and inclined downwards and towards the contact line between the rollers (31,33); at least the lower edge of the wall (35) is hollowed out in the center to define the position of the line of the material "T” coming from the supply system (1) along the contact line between the two rollers (31.33).
  • FIG. 7 A similar solution is shown in Figures 7 and 8, where on a rotor (39) similar to that of the solution of Figures 5 and 6, in the cavity (39C) are mounted two rollers (41 and 43), the reciprocal contact line is located on a plane which passes through the axis of rotation X - X.
  • a wall (45) develops inclined from top to bottom and shows the terminal edge (45A) off-center with respect to the axis X - X, so as to maintain displaced the material of the line "T" subjected to false twist and drawing; thus the line "T” results once again in rotation around the axis X - X for the formation of the balloon.
  • FIGS. 9 and 10 illustrate an embodiment in which a stretching and false twist group (83) is provided.
  • a support (85) by means of ball bearings (87) supports a rotor (89) rotated along the axis X - X, which rotor carries a pair of rollers (91,93) which rotate so as to obtain the drawing of the material and which are controlled in rotation by a suitable known transmission system.
  • the rotor (89) forms a large axial cavity (89C) on the upper opening of which is applied a cover (95) similar to that (71), but with a large axial opening (95A), and always mounted with a possibility of friction drive by the intervention of a friction ring (97).
  • a thread guide (99) which can be symmetrical and developed with hook or double hook so as to allow the possibility of operation in both directions of rotation, and in some way capable to engage the material of the line "T" which arrives from the feed system (1), so as to drive it in rotation along a circumferential trajectory concentric with the axis X - X and to obtain a centrifugal expansion effect and therefore of forming a balloon as in the previous cases; the material converges - guided by a conical extension (95A) - between the two rollers (91 and 93) so as to be stretched and conveyed during the successive spinning phase.
  • the element (95) can be stopped against rotation to overcome the friction effect operated by the rotor (89), to obtain the introduction of the material of the line "T" at the beginning of the work, although that this introduction can even be carried out spontaneously or possibly aided by a pneumatic effect, for example with a small blowing spout, schematically indicated with (101) with lines and dots.
  • Figures 11 and 12 show a modified embodiment, in which the same references in Figures 1 and 2 indicate equal or corresponding elements.
  • the drive in rotation and in expansion is carried out by the hole (75) off-center while the hole (9F) in this solution can have the inner terminal edge on the axis;
  • the introduction operation - if performed with the rotor (9) in rotation - is obtained with the temporary stop of the cover (71) to allow the introduction operation, after which, with the abandonment of the cover (71 ), this resumes being driven by friction on the part of the rotor (9) and capable of entraining with the walls of the hole (75) (which rotates along a circumferential trajectory around the axis X - X) the material "T" which thus comes to form the ball for the purposes and the above-mentioned manner .
  • Figures 13 and 15 illustrate a solution similar to that of Figures 3 and 4, which are used in part the same reference numbers.
  • This solution provides for the passage of the wick a large outlet orifice (209P) with a roughly wide circumferential profile and, for approaching, bringing and positioning the wire at the gripping or pinching point, provides for the casing.
  • (209S) semicircular even as a guide wire, on which was provided - for a limited line - a groove (216); by means of it and for the development of the orifice (209P) is ensured the grip of the wire.
  • the design is valid in addition to that for the groups of false torsion which have been defined and illustrated, even to groups of false torsion of other types known on the market.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
EP94830114A 1993-03-19 1994-03-17 Verfahren und Vorrichtung zum Strecken, durch Falschzwirnen, Textil-Faserstrangen Withdrawn EP0616059A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITFI930053 1993-03-19
ITFI930053A IT1262044B (it) 1993-03-19 1993-03-19 Metodo ed apparecchiatura per lo stiramento con falsa torsione di materiale di fibre tessili in forma di stoppino.

Publications (1)

Publication Number Publication Date
EP0616059A1 true EP0616059A1 (de) 1994-09-21

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EP94830114A Withdrawn EP0616059A1 (de) 1993-03-19 1994-03-17 Verfahren und Vorrichtung zum Strecken, durch Falschzwirnen, Textil-Faserstrangen

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EP (1) EP0616059A1 (de)
IT (1) IT1262044B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7617570B2 (en) 2006-03-22 2009-11-17 Whirlpool Corporation Double-pivot, constrained kinematic hinge for a front-loading laundry machine
CN114934333A (zh) * 2022-05-30 2022-08-23 海宁市优力安新材料科技有限公司 基于纳米氧化物的抗菌功能纱、其加工方法及设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2959906A (en) * 1955-09-19 1960-11-15 Richter Hans Device and method for crimping fully synthetic threads and thread strands
GB1101714A (en) * 1964-01-25 1968-01-31 Scragg & Sons Driving yarn false twist spindles
GB1121967A (en) * 1966-06-02 1968-07-31 Leesona Corp False twist spindle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2959906A (en) * 1955-09-19 1960-11-15 Richter Hans Device and method for crimping fully synthetic threads and thread strands
GB1101714A (en) * 1964-01-25 1968-01-31 Scragg & Sons Driving yarn false twist spindles
GB1121967A (en) * 1966-06-02 1968-07-31 Leesona Corp False twist spindle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7617570B2 (en) 2006-03-22 2009-11-17 Whirlpool Corporation Double-pivot, constrained kinematic hinge for a front-loading laundry machine
CN114934333A (zh) * 2022-05-30 2022-08-23 海宁市优力安新材料科技有限公司 基于纳米氧化物的抗菌功能纱、其加工方法及设备

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Publication number Publication date
ITFI930053A1 (it) 1994-09-19
ITFI930053A0 (it) 1993-03-19
IT1262044B (it) 1996-06-18

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