EP0415295A1 - Procédé de filage à fausse torsion et dispositif pour la mise en oeuvre de ce procédé - Google Patents

Procédé de filage à fausse torsion et dispositif pour la mise en oeuvre de ce procédé Download PDF

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Publication number
EP0415295A1
EP0415295A1 EP90116320A EP90116320A EP0415295A1 EP 0415295 A1 EP0415295 A1 EP 0415295A1 EP 90116320 A EP90116320 A EP 90116320A EP 90116320 A EP90116320 A EP 90116320A EP 0415295 A1 EP0415295 A1 EP 0415295A1
Authority
EP
European Patent Office
Prior art keywords
spinning
swirl
sliver
fiber
pair
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
EP90116320A
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German (de)
English (en)
Other versions
EP0415295B1 (fr
Inventor
Herbert Dr. Stalder
Rolf Binder
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.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
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 Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0415295A1 publication Critical patent/EP0415295A1/fr
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Publication of EP0415295B1 publication Critical patent/EP0415295B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/11—Spinning by false-twisting
    • 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
    • B65H54/026—Doubling winders, i.e. for winding two or more parallel yarns on a bobbin, e.g. in preparation for twisting or weaving
    • 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

Definitions

  • the invention relates to a method for false wire spinning of a spinning master fed as a single sliver by means of a drafting device, at least one mechanical swirl device and a pair of take-off rollers and a device for carrying out the method.
  • the sheath fibers have to be separated from the core fibers, that is to say at least to a certain degree, so that the sheath fibers can be rotated around the rotated core at a pitch angle that deviates from the pitch angle of the core.
  • the separation or separation of the sheath fibers from the core fibers is always at least partially from those Conditions in the swirl generation zone dependent. This statement is explained in more detail below in the description of the figures and in connection with various variants of the false wire spinning process.
  • the object of the invention is to provide a method and a device with which a more uniform yarn can be produced. This object becomes clearer in connection with the following description of the prior art.
  • sheath fibers are wound around the wrongly twisted core in such a way that when the false twist is subsequently removed, the sheath fibers at least partially get a real twist. All known methods to achieve this goal are based on a single principle:
  • a sheath fiber is connected to the rotating thread at one end and braked at another point, so that the rotation of the thread leads to a wrapping of the sheath fiber around the wrongly twisted core. All variants of this method are suitable for use in the new spinning process.
  • FIG. 1 shows an air spinning process according to US-A-4 124 972.
  • this document is expressly declared to be part of the present application.
  • reference number 10 indicates the nip line of a pair of delivery rollers of a drafting system, not shown, whereby fiber material 12 is delivered to a spinning device 14.
  • the spinning device 14 comprises a guide part 16, a throttle part 18 and a swirl generating part 20.
  • the part 20 is provided with air nozzles, not shown, in order to generate a rotating air flow in the swirl chamber 22, so that the fiber structure 24 in the guide part 16 is rotated about its own longitudinal axis . After the twist chamber 22, the rotation of the fibers is largely canceled again according to the false twist principle in order to form an essentially untwisted yarn core.
  • Part of the core twist is transferred to the sheath fibers, which loop around the incorrectly twisted fiber structure 24 in parts 16 and 20 with a pitch angle that deviates from the pitch angle of the core fibers.
  • these sheath fibers continue to wrap around the core fibers and determine the strength of the finished spun yarn 26, which is drawn off by a pair of take-off rollers 28.
  • the fiber material 12 supplied by the drafting system consists in the clamping line 10 of an essentially parallelized sliver without great cohesion.
  • the fibers must be combined into a solidified fiber structure within the spinning triangle 30 by propagating the rotation of the incorrectly rotated core. This structure must have sufficient strength to withstand the spinning tension.
  • the relationships in the spinning triangle 30 are explained in more detail below in connection with FIG. 3.
  • the spinning conditions in a further variant of the air spinning process will be explained with reference to FIG. 2, but elements which have essentially the same effect have been given the same reference numerals as in FIG. 1.
  • FIG. 2 corresponds to the description of FIG. 5 of US reissue patent 31,705. That in the clamping line 10 of the drafting system, not shown existing fiber material 12 is combined into a fiber structure 24A by propagation of the rotation of the incorrectly rotated core. The rotation of the core is generated in a swirl device 32 with air nozzles (not shown) and a swirl chamber 34. However, the system differs considerably from the system according to FIG. 1 in that a second swirl generator 36 with air nozzles (not shown) and a swirl chamber 38 is present between the swirl generator 32 and the drafting system.
  • the swirl generator 36 produces a rotation opposite to the action of the swirl generator 32, which, according to US reissue patent 31 705, prevents the full rotation of the core from propagating into the spinning triangle and loosens the fiber structure with the corresponding production of sheath fibers.
  • This effect of the swirl generator 36 is to be caused by balloon formation in the swirl chamber 38, for which purpose the openings and outlets 40 and 42 of the chamber 38 have to be narrowed to form nodes of the balloon. Whether this explanation of the effect of the swirl generator 36 is exactly correct can be stated here. For the time being, the conditions in the swirl chambers 22 and 34 are explained in more detail.
  • the swirl chambers according to US-A-4 124 972 and US-RE-31 705 are not identical to one another and are accordingly not provided with the same reference symbols here. In one respect, however, they have to work the same way, namely in the formation of a spiral in the yarn 26 and 26a between the swirl chamber and the pair of take-off rolls 28. Without this spiral formation, no rotation of the yarn core and therefore no propagation of the core twist up to the spinning triangle 30 is produced.
  • FIG. 3A shows the Guide part 16 of the spinning device, the clamping line 10, the fiber material 12 and the spinning triangle 30.
  • part 16 has been omitted, but continues to show the same spinning system at different times. It can be assumed that the drafting system delivers fibers over a certain width S of the clamping line 10. Most of the fibers 12 are incorporated into the wrongly rotated core within the spinning triangle 30.
  • the tail of the fiber F is either pushed into the spinning triangle 30 and integrated in the core (FIG. 3D) or only released by the clamping line 10.
  • edge fiber F If the edge fiber F is not too short and therefore is not released too quickly by the clamping line 10, the tensile force exerted on the fiber F leads to a shift of the structure 24 from the original central position with respect to the delivery width S (FIG. 3A) in FIG a direction against the still bound end of the edge fiber F ( Figures 3C and 3D). This leads to the asymmetry of the spinning triangle 30, which can be clearly seen in FIG. 3D. This asymmetry results in conditions in the spinning triangle which are suitable for producing an edge fiber R at the left end of the delivery width S (FIG. 3D). In a method according to US-A-4 124 972, the structure 24 therefore oscillates from side to side of the delivery width S (FIG. 3E).
  • This oscillation or pendulum movement P plays an essential role in the production of edge fibers in such a process. However, it is dependent on a lower voltage in the structure 24. The pulling force exerted on the yarn 26 by the puller roller pair 28 must not exceed a certain value without affecting the conditions in or around the spinning triangle.
  • the free fiber length is stretched by friction on the walls of the channel.
  • an air vortex is generated through the bores 38 in the swirl generator 36, which swings over the free end of the edge fibers RF 'in the thread running direction, and then winds around the rotating core in the opposite direction of rotation.
  • there are stable conditions in the spinning triangle 30 that can remain symmetrical. These conditions are brought about by the narrowed mouth 40 and its proximity to the tip of the spinning triangle 30.
  • a spinning device 50 essentially consists of a drafting device 51, a guide element 55, a mechanical swirl element 58 and a pair of draw-off rollers 59.
  • the drafting device 51 consists of a pair of draw-in rollers 52, an apron drafting device 53 and a pair of delivery rollers 54.
  • the guide element 55 contains a nozzle 55A with a funnel-shaped inlet and a nozzle channel 56. Just before the outlet of the funnel-shaped inlet, transverse bores 57A are arranged which are connected to a vacuum source (not shown) for suction.
  • Tangential bores 57B are provided behind the mouth or throttle point 56A of the nozzle channel 56.
  • the mechanical swirl member 58 consists of two disks 58A, which are arranged in parallel planes with an overlapping area and can be driven in opposite directions, so that the continuous sliver undergoes rotation by friction in the hatched area and is spun into a yarn 61.
  • the guide element 55 of the spinning device 50 includes a nozzle 55B with a continuous, continuous nozzle channel 56 and bores 57B opening tangentially therein, which form an obtuse angle with the thread running direction.
  • the mechanical swirl member 58 here consists of two belts 58B that move in opposite directions.
  • the belts 58B are endless and driven on two rollers, not shown.
  • the continuous sliver receives a rotational movement and a pull.
  • the main delays in the actual spinning zone are the delay ⁇ 1, that is, the ratio of the throughput speed V L of the sliver 60 on the delivery roller pair 54 of the drafting device 51 and the speed V D on the mechanical swirl member 58, and the delay ⁇ 2 that is, the ratio of Speed V L and the speed V A of the yarn 61 on the pair of draw rollers 59.
  • the ratio of the two delays ⁇ 1: ⁇ 2 is now chosen so that a high spinning tension between the nip line of the delivery rollers 54 and the mechanical swirl member 58 is achieved.
  • This high spinning tension prevents the spinning triangle 30 of the sliver 60 from being able to oscillate back or forth along the nip line of the pair of delivery rollers 54 (at least insignificantly) (FIG. 7).
  • the formation of a locally stable spinning triangle has the advantage that it affects the Stability of the spinning conditions are clearly predictable. Over a length SD of the clamping line 10, practically all of the fibers of the fiber sliver 60 supplied reach the rotated core.
  • Fibers F1 and F2 which are supplied outside this length SD, serve as edge fibers, that is to say as sheath or wrapping fibers. This creates optimal conditions for the attachment of the sheath fibers in the area of the spinning triangle 30. These optimal ratios are dependent on the stack length of the fiber material used and on the ratio of the distortions ⁇ 1 and ⁇ 2 in the spinning system. It has been proven that the distance between the mouth of the nozzle channel 56 of the guide element 55 and the clamping line 10 is 60 to 75%, preferably 68 to 72%, of the average fiber length of the fiber sliver to be spun.
  • the warp ⁇ 1 is advantageously greater than 1, the warp ⁇ 2 is set about 1, so that a spinning tension of at least 1.5 cN-tex is established.
  • the size and shape of the spinning triangle 30 (FIG. 7) is determined by the spinning tension (thread tension), but the number of edge fibers can be determined independently via the total delivery width B set by the drafting device.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP19900116320 1989-09-01 1990-08-25 Procédé de filage à fausse torsion et dispositif pour la mise en oeuvre de ce procédé Expired - Lifetime EP0415295B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3184/89 1989-09-01
CH318489 1989-09-01

Publications (2)

Publication Number Publication Date
EP0415295A1 true EP0415295A1 (fr) 1991-03-06
EP0415295B1 EP0415295B1 (fr) 1995-04-19

Family

ID=4250452

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900116320 Expired - Lifetime EP0415295B1 (fr) 1989-09-01 1990-08-25 Procédé de filage à fausse torsion et dispositif pour la mise en oeuvre de ce procédé

Country Status (3)

Country Link
EP (1) EP0415295B1 (fr)
JP (1) JP3095230B2 (fr)
DE (1) DE59008923D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011006580A1 (fr) * 2009-07-17 2011-01-20 Maschinenfabrik Rieter Ag Elément pour dispositif de filature à tuyère à air

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2570663Y2 (ja) * 1992-10-09 1998-05-06 村田機械株式会社 紡績装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2722319A1 (de) * 1977-01-10 1978-07-13 Toyo Boseki Verfahren und vorrichtung zum herstellen von garnen
EP0131170A1 (fr) * 1983-07-01 1985-01-16 Maschinenfabrik Rieter Ag Procédé et dispositif de filature par fausse-torsion
DE3639031A1 (de) * 1985-11-15 1987-05-21 Murata Machinery Ltd Vorrichtung zur herstellung eines gesponnenen fadens
EP0222981A1 (fr) * 1985-11-21 1987-05-27 Schubert & Salzer Maschinenfabrik Aktiengesellschaft Procédé et dispositif pour la filature des fibres
EP0305971A1 (fr) * 1987-08-31 1989-03-08 Maschinenfabrik Rieter Ag Procédé et dispositif de filature par fausse torsion
EP0321885A1 (fr) * 1987-12-18 1989-06-28 Maschinenfabrik Rieter Ag Tuyère pneumatique pour fausse torsion

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2722319A1 (de) * 1977-01-10 1978-07-13 Toyo Boseki Verfahren und vorrichtung zum herstellen von garnen
EP0131170A1 (fr) * 1983-07-01 1985-01-16 Maschinenfabrik Rieter Ag Procédé et dispositif de filature par fausse-torsion
DE3639031A1 (de) * 1985-11-15 1987-05-21 Murata Machinery Ltd Vorrichtung zur herstellung eines gesponnenen fadens
EP0222981A1 (fr) * 1985-11-21 1987-05-27 Schubert & Salzer Maschinenfabrik Aktiengesellschaft Procédé et dispositif pour la filature des fibres
EP0305971A1 (fr) * 1987-08-31 1989-03-08 Maschinenfabrik Rieter Ag Procédé et dispositif de filature par fausse torsion
EP0321885A1 (fr) * 1987-12-18 1989-06-28 Maschinenfabrik Rieter Ag Tuyère pneumatique pour fausse torsion

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011006580A1 (fr) * 2009-07-17 2011-01-20 Maschinenfabrik Rieter Ag Elément pour dispositif de filature à tuyère à air

Also Published As

Publication number Publication date
JPH0390636A (ja) 1991-04-16
EP0415295B1 (fr) 1995-04-19
DE59008923D1 (de) 1995-05-24
JP3095230B2 (ja) 2000-10-03

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