EP1473388B1 - Fibre condensing device for spinning machines - Google Patents

Fibre condensing device for spinning machines Download PDF

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Publication number
EP1473388B1
EP1473388B1 EP04380069.7A EP04380069A EP1473388B1 EP 1473388 B1 EP1473388 B1 EP 1473388B1 EP 04380069 A EP04380069 A EP 04380069A EP 1473388 B1 EP1473388 B1 EP 1473388B1
Authority
EP
European Patent Office
Prior art keywords
tubular element
drive cylinder
sliver
bands
condensing
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
EP04380069.7A
Other languages
German (de)
French (fr)
Other versions
EP1473388A3 (en
EP1473388A2 (en
Inventor
José Figuls Prat
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 EP1473388A2 publication Critical patent/EP1473388A2/en
Publication of EP1473388A3 publication Critical patent/EP1473388A3/en
Application granted granted Critical
Publication of EP1473388B1 publication Critical patent/EP1473388B1/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
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/72—Fibre-condensing guides
    • 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
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D01H1/22—Driving or stopping arrangements for rollers of drafting machines; Roller speed control
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/26—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by one or more endless aprons

Definitions

  • the present invention relates to a device for condensing the fibres in the sliver in spinning machines, having significant characteristics of novelty and inventive step.
  • the device to which the present invention relates is intended to condense the fibre sliver that issues from the draw-frame in spinning machines, significantly reducing the effect of fibres protruding from the sliver, which create the effect known as "hairs" due to faults in the condensing of the sliver.
  • the present invention provides a system for condensing after drawing and before twisting, by means of an aerodynamic arrangement, of which the degree of condensing depends on the quantity and diameter of the holes in a band or "bag” transporting the bundle of fibres, of which the perforated bag is subjected to suction through one or more grooves, in such a way that, after being drawn and before being twisted, the fibres are placed above the perforated bag which travels at a speed somewhat higher than said first line cylinder or forming cylinder, performs condensing drawing with slight tension of the fibres and helps to orient them longitudinally.
  • One or more grooves that are straight or inclined in the direction of the fibres are connected to a suction source creating a transverse force that condenses the fibres deposited above the perforated bag.
  • the width of the fibres is reduced by means of this arrangement, and this reduces and almost eliminates the so-called spinning triangle, and orients and integrates the fibres uniformly in the cross section of the yarn, thus improving the arrangement of the fibres, reducing the quantity of unintegrated fibres, reducing hairiness or fluffiness, reducing variation in the diameter of the yarn through less loss of fibres through suction, and reducing points that are thin, thick, etc. Hence, a cleaner, more regular and better quality yarn may be obtained through the application of the present invention.
  • the document EP 1 300 495 A1 discloses a device for condensing according to the preamble of claim 1.
  • the yarn will be twisted, allowing a yarn with very advantageous properties for the spinning process and for the subsequent processes of dyeing, weaving, etc. to be obtained.
  • Fig. 1 is a diagrammatic view of the arrangement of rollers of said first, second and third lines in a conventional drawing system.
  • Fig. 2 is a diagrammatic view similar to Fig. 1 of a condensing device according to the present invention.
  • Fig. 3 is a diagrammatic cross section of the device according to the present invention.
  • Fig. 4 is a cross section of the actual device according to the invention.
  • Fig. 5 is a perspective view of the actual device according to the invention, from the driving side.
  • the entering fibre bundle 1 is received by a first roller 2 rotating at low speed, then passes to the second rollers 3 rotating at a slightly higher speed than the roller 2 and performing with respect thereto what is known as preliminary drafting, and then passes to a third roller 4 revolving at a much higher speed of approximately 12 to 80 times the speed of the roller 2 performing the main drawing.
  • the sliver 1 has been reducing to a much narrower, sufficiently parallel sliver 5.
  • said spinning triangle 6 is formed, of which the vertex has been produced by the twisting of the yarn 8.
  • the present invention provides for the arrangement, after the conventional roller 4, of a condensing device which is formed as shown diagrammatically in Fig. 2 by means of a tubular element 20 connected to a source of vacuum, and has transverse grooves that are inclined or straight 7, single or multiple, and are covered by a band 9 provided with micro-orifices, all of which is shown in more detail in Fig. 3 et seq., so the suction which is produced in the tubular element 20 and transmitted by the single or multiple grooves 7 contributes to condensing of the sliver, making it parallel and preventing the protrusion of transverse fibres, so the spinning triangle, from the point 10 from which the yarn is subjected to twisting 11, is reduced to a minimum value.
  • the tubular element 20 has a concave side adapted externally to a part of the drive cylinder.
  • the tubular element 20 is of a specific, substantially trapezoidal form, having in its upper gently curved side the grooves 7 over which there runs the perforated band, also called perforated bag 9, which is tensioned and guided by a longitudinal bar 12 provided with small longitudinal recesses, as can be seen in said Fig. 3 , for housing the band or bag 9, which is actuated by the cylinder 13. While a roller covered with synthetic rubber 14 rests on the perforated band or bag 9 through the pressure applied by the spring 15.
  • the cylinder 13 has a toothed pinion 16 which meshes with the transmission wheel 17 of a transmission shaft 18.
  • Said shaft 18 is connected to the following section of the spinning machine, running along the whole length thereof.
  • a servomotor will actuate the shaft 18, allowing its speed to be changed to achieve optimum condensing drawing.
  • the pinion 16 and the wheel 17 are enclosed inside a surrounding case or housing 19 to prevent the entry of dirt, and guarantee lubrication.
  • these gears can be replaced by toothed wheels at 45o to perpendicular shafts when there is not enough space to install the shaft 18 beneath the cylinder 13 and it must be placed behind the drawing entry cylinder.
  • the driving shaft takes its power directly from the drive shaft of the unit, which helps avoid mechanical problems of breakage of the shaft used in the draw-frames for the normal driving of the rollers, if the device according to the invention is to be incorporated into spinning machines that are already in operation.
  • a further important advantage of the device according to the present invention is the low sensitivity of the precise diameter of the levelling rollers, since precision of levelling is not required, given the general arrangement of the device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Description

  • The present invention relates to a device for condensing the fibres in the sliver in spinning machines, having significant characteristics of novelty and inventive step.
  • The device to which the present invention relates is intended to condense the fibre sliver that issues from the draw-frame in spinning machines, significantly reducing the effect of fibres protruding from the sliver, which create the effect known as "hairs" due to faults in the condensing of the sliver.
  • By means of the device according to the present invention, improved condensing of the fibres that make up a sliver is possible, and this significantly increases the quality of the yarn produced.
  • To achieve more regular and better quality yarns, the present invention provides a system for condensing after drawing and before twisting, by means of an aerodynamic arrangement, of which the degree of condensing depends on the quantity and diameter of the holes in a band or "bag" transporting the bundle of fibres, of which the perforated bag is subjected to suction through one or more grooves, in such a way that, after being drawn and before being twisted, the fibres are placed above the perforated bag which travels at a speed somewhat higher than said first line cylinder or forming cylinder, performs condensing drawing with slight tension of the fibres and helps to orient them longitudinally. One or more grooves that are straight or inclined in the direction of the fibres are connected to a suction source creating a transverse force that condenses the fibres deposited above the perforated bag.
  • The width of the fibres is reduced by means of this arrangement, and this reduces and almost eliminates the so-called spinning triangle, and orients and integrates the fibres uniformly in the cross section of the yarn, thus improving the arrangement of the fibres, reducing the quantity of unintegrated fibres, reducing hairiness or fluffiness, reducing variation in the diameter of the yarn through less loss of fibres through suction, and reducing points that are thin, thick, etc. Hence, a cleaner, more regular and better quality yarn may be obtained through the application of the present invention.
  • The document EP 1 300 495 A1 discloses a device for condensing according to the preamble of claim 1.
  • Following the condensing device of the present invention, the yarn will be twisted, allowing a yarn with very advantageous properties for the spinning process and for the subsequent processes of dyeing, weaving, etc. to be obtained.
  • As an explanatory and non-limiting example, the accompanying drawings will assist understanding of the present invention.
  • Fig. 1 is a diagrammatic view of the arrangement of rollers of said first, second and third lines in a conventional drawing system.
  • Fig. 2 is a diagrammatic view similar to Fig. 1 of a condensing device according to the present invention.
  • Fig. 3 is a diagrammatic cross section of the device according to the present invention.
  • Fig. 4 is a cross section of the actual device according to the invention.
  • Fig. 5 is a perspective view of the actual device according to the invention, from the driving side.
  • As illustrated in the figures, in a conventional draw-frame the entering fibre bundle 1 is received by a first roller 2 rotating at low speed, then passes to the second rollers 3 rotating at a slightly higher speed than the roller 2 and performing with respect thereto what is known as preliminary drafting, and then passes to a third roller 4 revolving at a much higher speed of approximately 12 to 80 times the speed of the roller 2 performing the main drawing. The sliver 1 has been reducing to a much narrower, sufficiently parallel sliver 5. On leaving the nip of the roller 4 said spinning triangle 6 is formed, of which the vertex has been produced by the twisting of the yarn 8.
  • The present invention provides for the arrangement, after the conventional roller 4, of a condensing device which is formed as shown diagrammatically in Fig. 2 by means of a tubular element 20 connected to a source of vacuum, and has transverse grooves that are inclined or straight 7, single or multiple, and are covered by a band 9 provided with micro-orifices, all of which is shown in more detail in Fig. 3 et seq., so the suction which is produced in the tubular element 20 and transmitted by the single or multiple grooves 7 contributes to condensing of the sliver, making it parallel and preventing the protrusion of transverse fibres, so the spinning triangle, from the point 10 from which the yarn is subjected to twisting 11, is reduced to a minimum value. The tubular element 20 has a concave side adapted externally to a part of the drive cylinder.
  • As shown in Fig. 3, the tubular element 20 is of a specific, substantially trapezoidal form, having in its upper gently curved side the grooves 7 over which there runs the perforated band, also called perforated bag 9, which is tensioned and guided by a longitudinal bar 12 provided with small longitudinal recesses, as can be seen in said Fig. 3, for housing the band or bag 9, which is actuated by the cylinder 13. While a roller covered with synthetic rubber 14 rests on the perforated band or bag 9 through the pressure applied by the spring 15.
  • The cylinder 13 has a toothed pinion 16 which meshes with the transmission wheel 17 of a transmission shaft 18. Said shaft 18 is connected to the following section of the spinning machine, running along the whole length thereof. A servomotor will actuate the shaft 18, allowing its speed to be changed to achieve optimum condensing drawing. The pinion 16 and the wheel 17 are enclosed inside a surrounding case or housing 19 to prevent the entry of dirt, and guarantee lubrication. In some applications these gears can be replaced by toothed wheels at 45º to perpendicular shafts when there is not enough space to install the shaft 18 beneath the cylinder 13 and it must be placed behind the drawing entry cylinder.
  • As will be seen, through the arrangement of elements described, effective condensing of the fibres in the sliver in spinning machines can be achieved, producing the substantial advantages indicated at the beginning.
  • In particular, in the device according to the invention, the driving shaft takes its power directly from the drive shaft of the unit, which helps avoid mechanical problems of breakage of the shaft used in the draw-frames for the normal driving of the rollers, if the device according to the invention is to be incorporated into spinning machines that are already in operation.
  • A further important advantage of the device according to the present invention is the low sensitivity of the precise diameter of the levelling rollers, since precision of levelling is not required, given the general arrangement of the device.
  • Similarly, as it has an independent actuating shaft, it is possible to adjust the condensing drawing to the most appropriate values.

Claims (2)

  1. Device for condensing sliver (5) of fibres in spinning machines that comprises,
    - a tubular element (20) which may be positioned at the outlet of a final pair of rollers (4) of a spinning machine drawing unit which may be
    ∘ positioned parallel to the axis of said rollers (4), and
    ∘ connected to a source of vacuum,
    - the tubular element (20) is provided with multiple transverse grooves (7) for various drawing units of the spinning machine, and
    - bands (9) which run on the tubular element (20),
    - each band (9) is provided with small perforations and in turn may receive, on its surface remote from said tubular element (20), the sliver (5) leaving the drafting unit and performing the transverse condensing of said sliver as it adapts to the empty grooves through the perforated band,
    - the tubular element (20) having a gently curved structure in the adaption region of the perforated band, wherein
    - the device further comprises
    ∘ a drive cylinder (13) inside the perforated bands (9) and
    ∘ an upper roller (14)
    ▪ the drive cylinder (13) receives said tangential upper roller (14)
    ▪ the upper roller (14) has a resilient characteristic, characterized in that
    - said bands (9) are mounted in contact
    ∘ with the part of the tubular suction element (20) that has the grooves (7),
    ∘ with a peripheral region of the drive cylinder (13), and
    ∘ with a bar (12) provided with small longitudinal recesses for tensioning and guiding said bands (9),
    - the drive cylinder (13) is actuated by a longitudinal transmission shaft (18) which may be positioned along said various drawing units of the spinning machine,
    - said drive cylinder (13) has a toothed pinion (16) which meshes with a transmission wheel (17) of said transmission shaft (18),
    - said longitudinal transmission shaft (18) is actuated by a servomotor.
  2. Device according to claim 1, characterized in that the tubular element (20) has a concave side adapted externally to a part of the drive cylinder (13).
EP04380069.7A 2003-04-30 2004-03-30 Fibre condensing device for spinning machines Expired - Lifetime EP1473388B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200301064U ES1054642Y (en) 2003-04-30 2003-04-30 "DEVICE FOR THE CONDENSATION OF FIBERS IN SPINDING MACHINES"
ES200301064U 2003-04-30

Publications (3)

Publication Number Publication Date
EP1473388A2 EP1473388A2 (en) 2004-11-03
EP1473388A3 EP1473388A3 (en) 2005-08-31
EP1473388B1 true EP1473388B1 (en) 2015-03-18

Family

ID=27838475

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04380069.7A Expired - Lifetime EP1473388B1 (en) 2003-04-30 2004-03-30 Fibre condensing device for spinning machines

Country Status (2)

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EP (1) EP1473388B1 (en)
ES (1) ES1054642Y (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10343316A1 (en) * 2003-09-10 2005-04-14 Wilhelm Stahlecker Gmbh Fiber strand focussing apparatus of spinning machine, has tension roller that arranged at down stream side of deflection roller, enables deflection roller to deflect transport belt at specific angle
ES2215487B1 (en) * 2004-03-11 2005-08-01 Pinter, S.A. DRIVING DEVICE FOR FIBER CONDENSATION MECHANISMS IN STYLING TRAINING OF SPINDING MACHINES.
ES2215488B1 (en) * 2004-03-11 2005-08-01 Pinter, S.A. IMPROVEMENTS IN THE STYLING TRAINS OF SPINNING MACHINES.
DE102007015694A1 (en) * 2007-03-31 2008-10-02 Oerlikon Textile Gmbh & Co. Kg spinning machine
DE202007011954U1 (en) * 2007-08-23 2007-10-18 Wilhelm Stahlecker Gmbh Drawframe and lower roller bearing carriage
CN109735972B (en) * 2019-03-13 2023-09-12 无锡市和展机电技术有限公司 Alternating draft double-channel spinning device and spinning method of variable-count variable-ratio variable-twist yarn
JP2023108076A (en) 2022-01-25 2023-08-04 株式会社豊田自動織機 Fiber bundle condensing device for spinning machine
JP2023108077A (en) 2022-01-25 2023-08-04 株式会社豊田自動織機 Fiber bundle condensing device for spinning machine
EP4279645A1 (en) 2022-05-17 2023-11-22 Kabushiki Kaisha Toyota Jidoshokki Fiber bundle condensing device of spinning machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07145520A (en) * 1993-11-20 1995-06-06 Nippon Boseki Yohin Kenkyusho:Kk Controller for driving of drawing frame

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10104803A1 (en) * 2001-01-29 2002-08-01 Stahlecker Fritz Condensing zones for drawn slivers, at the drawing units for a number of spinning stations, are formed by separate housings at a common suction tube along the line of the spinning machine
JP3820951B2 (en) * 2001-10-04 2006-09-13 株式会社豊田自動織機 Fiber bundle focusing device in spinning machine
DE10227463C1 (en) * 2002-06-20 2003-10-16 Zinser Textilmaschinen Gmbh Ring spinning machine with stretching mechanism and compression system, has pressure unit extended to mount drive roller of compression system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07145520A (en) * 1993-11-20 1995-06-06 Nippon Boseki Yohin Kenkyusho:Kk Controller for driving of drawing frame

Also Published As

Publication number Publication date
EP1473388A3 (en) 2005-08-31
ES1054642Y (en) 2003-12-01
ES1054642U (en) 2003-08-16
EP1473388A2 (en) 2004-11-03

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