US20070227116A1 - Spindle-shaped component for an air-jet spinning arrangement with an injection channel - Google Patents

Spindle-shaped component for an air-jet spinning arrangement with an injection channel Download PDF

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Publication number
US20070227116A1
US20070227116A1 US11/783,877 US78387707A US2007227116A1 US 20070227116 A1 US20070227116 A1 US 20070227116A1 US 78387707 A US78387707 A US 78387707A US 2007227116 A1 US2007227116 A1 US 2007227116A1
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United States
Prior art keywords
channel
spindle
tip
shaped
base body
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.)
Abandoned
Application number
US11/783,877
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English (en)
Inventor
Gerd Stahlecker
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
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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
Assigned to MASCHINENFABRIK RIETER AG reassignment MASCHINENFABRIK RIETER AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: STAHLECKER, GERD
Publication of US20070227116A1 publication Critical patent/US20070227116A1/en
Abandoned legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/02—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by a fluid, e.g. air vortex
    • 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
    • D01H1/115—Spinning by false-twisting using pneumatic means
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • D01H15/002—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing for false-twisting spinning machines

Definitions

  • the present invention relates to a spindle-shaped component for an air jet spinning arrangement having a base body and an attached tip, also having a yarn withdrawal channel which extends through the base body and the tip, the yarn withdrawal channel having an entry opening arranged in the tip, whereby the spindle-shaped component includes at least one injection channel which runs into the yarn withdrawal channel, the injection channel being directed in the direction of the entry opening of the yarn withdrawal channel.
  • the present invention relates further to a tip and a base body for a spindle-shaped component of this type.
  • a spindle-shaped component of this type is shown in German published patent application DE 10 2004 044 345 A1.
  • a fibre strand of staple fibres is fed to an air jet spinning arrangement and there the spinning twist is then given.
  • the fibre strand is initially fed through a fibre feed channel of the air jet spinning arrangement into a vortex chamber, to which a fluid device for generating a vortex current around an entry opening of a thread withdrawal channel is assigned.
  • the front ends of the fibres held in the fibre strand are hereby fed into the thread withdrawal channel, while rear free fibre ends spread out, are seized by the vortex current and are twined around the front ends already located in the entry opening of the thread withdrawal channel, that is the ends that are already intertwined, whereby a thread, having to a great extent real twist is generated.
  • the known spindle-shaped component has the disadvantage that the injection channel running into the yarn withdrawal channel is formed by a very thin borehole.
  • the borehole for the injection channel is arranged in the tip attached to a base body of the spindle-shaped component.
  • the borehole of the injection channel is drilled at an acute angle to the yarn withdrawal channel and has usually a diameter of several tenths of a millimetre.
  • the manufacture of the injection channel is very complicated, as often the tip of the spindle-shaped component is made of a hard and wear-resistant material.
  • a different type of spindle-shaped component for an air jet spinning arrangement is known from German published patent application DE 103 49 651 A1, in which an injection channel extending in a different way is provided.
  • the injection channel runs at right angles into a yarn withdrawal channel and is thus not directed in the direction of the entry opening of the yarn withdrawal channel.
  • This placing of the injection channel has the disadvantage in that the injection action of the pressurized air stream into the yarn withdrawal channel is not as effective, so that a thread end necessary for the piecing process cannot always be reliably sucked against the spinning direction into the yarn withdrawal channel and transported through the airjet spinning arrangement. Due to the running of the injection channel at right angles into the yarn withdrawal channel, it can happen that the pressurized air flowing in also flows in a spinning direction through the yarn withdrawal channel, thus preventing a continuous air stream flowing against the spinning direction in the air jet spinning arrangement from occurring.
  • the present invention simplifies the manufacture of a spindle-shaped component of the above mentioned type.
  • At least one injection channel is formed by a surface area of the base body and a surface area of the tip.
  • the injection channel is not surrounded by only one of the components base body or tip, but by both simultaneously.
  • One section of the circumferential wall of the injection channel is formed by the base body and another section of the circumferential wall of the injection channel is formed by the tip.
  • an injection channel is formed by a cone-shaped surface area of the base body and/or a cone-shaped surface area of the tip.
  • a cone-shaped surface area it can be particularly well ensured that the injection channel, running into the yarn withdrawal channel, is directed in the direction of the entry opening of the yarn withdrawal channel, and also that the airstream directed against the spinning direction in the air jet spinning arrangement necessary for the piecing process, especially in the yarn withdrawal channel, is reliably generated when the injection channel is subjected to pressurized air.
  • the injection channel extends at an acute angle to the yarn withdrawal channel, namely at least in an area directly upstream of where the injection channel runs into the yarn withdrawal channel.
  • the injection channel at the finished spindle-shaped component is formed by a cone-shaped surface area of the tip, which is at a defined distance to a cone-shaped surface area of the base body.
  • a groove-shaped surface area either in the tip or in the base body is arranged to a cone-shaped surface area either in the tip or in the base body.
  • FIG. 1 shows an enlarged view of an axial section of a spindle-shaped component and a respective air jet spinning arrangement during operation
  • FIG. 2 shows an enlarged view of an axial section of another embodiment of the spindle-shaped component.
  • the exemplary air jet spinning arrangement shown in FIG. 1 serves to produce a spun thread 2 from a staple fibre strand 3 .
  • a drafting device 4 is arranged upstream of the air jet spinning arrangement 1 , which drafting device 4 generates a thin fibre strand 3 from a staple fibre band 5 and supplies it to the air jet spinning arrangement 1 .
  • the staple fibre strand 5 is fed to the drafting unit 4 in drafting direction A and drafted to a desired degree of fineness in the known way.
  • the partially shown drafting unit 4 is preferably a four-cylinder drafting device and includes therefore four roller pairs, each of which has a driven bottom roller and an upper roller designed as a pressure roller. Only the delivery roller pair 6 , 7 is shown, which borders the drafting device 4 . Directly downstream of the drafting unit 4 a thin fibre strand 3 is present, which is drafted and still twist-free.
  • the fibre strand 3 is fed via a fibre feed channel 8 to the air jet spinning arrangement 1 . Downstream thereof lies a vortex chamber 9 , in which the fibre strand 3 receives its spinning twist, so that the spun yarn 2 is formed, which is withdrawn through a thread withdrawal channel 10 in withdrawal direction B, and fed to a winding device (not shown).
  • the yarn withdrawal channel 10 in this example is arranged in a spindle-shaped component 11 stationary during operation, the component 11 including a base body 12 and a tip 13 .
  • the yarn withdrawal channel 10 includes an entry opening 14 for the forming yarn 2 , which opening 14 is arranged in the tip 13 .
  • a fluid device generates a vortex current during the spinning process in the vortex chamber 9 by blowing in compressed air through compressed air nozzles 15 , which run tangentially into the vortex chamber 9 .
  • the compressed air exiting out of the compressed air nozzles 15 is discharged via an evacuation channel 16 , whereby the channel 16 has a ring-shaped cross section around the spindle-shaped component 11 , which comprises the thread withdrawal channel 10 .
  • the air evacuation channel 16 is connected with a vacuum source (not shown).
  • an edge of a fibre guiding surface 17 acting as a twist stop, is arranged, the fibre guiding surface 17 being slightly eccentrically arranged to the thread withdrawal channel 10 in the area of its entry opening 14 .
  • the fibres to be spun are, on the one hand, held together in a fibre strand 3 , and thus fed from the fibre feed channel 8 into the thread withdrawal channel 10 essentially without a spinning twist, while on the other hand, the fibres in the area between the fibre feed channel 8 and the thread withdrawal channel 10 are exposed to the vortex current.
  • the vortex current causes the fibres, or at least their end areas to be driven away radially from the entry opening 14 of the thread withdrawal channel 10 .
  • the yarns 2 produced by the above described air jet spinning arrangement 1 display a core including fibres or fibre areas extending essentially in a thread longitudinal direction without any significant twist, and an outer area in which the fibres or fibre areas are wrapped around the core.
  • An air jet spinning arrangement 1 of this type permits very high spinning speeds, which lie in the range between 300 and 600 m per minute.
  • the compressed air exiting out of the compressed air nozzles 15 into the vortex chamber 9 is fed to the air jet spinning arrangement 1 during operation via a compressed air channel 18 and a ring channel 19 surrounding the vortex chamber 9 . If the fibre strand 3 or the yarn 2 breaks, the compressed air feeding the compressed air nozzles 15 is shut off. At the same time, the drives of the drafting device 4 and of the yarn withdrawal rollers and the winding device (not shown) can also be shut down.
  • the spindle-shaped component 11 Before the necessary piecing process can be carried out, it can be advantageous to move the spindle-shaped component 11 away from the fibre feed channel 8 for a short time for cleaning purposes.
  • a very small distance exists between the entry opening 14 of the yarn withdrawal channel 10 and the fibre guiding surface 17 , which can measure, for example, 0.5 mm.
  • the spindle-shaped component 11 can have a piston-shaped component 20 , so that moving the spindle-shaped component 11 away can be carried out very simply.
  • a ring channel 21 is arranged around the spindle-shaped component 11 , which ring channel 21 can be subjected to compressed air.
  • the compressed air in the ring channel 21 presses the piston-like component 20 , attached fixedly to the base body 12 of the spindle-shaped component 11 , upwards against the force of a spring 22 as shown in FIG. 1 .
  • the tip 13 of the spindle-shaped component 11 with the entry opening 14 of the yarn withdrawal channel 10 is moved aside by the fibre feed channel 8 and the fibre guiding surface 17 , so that there is more space in the vortex chamber 9 . Any fibre waste present on the vortex chamber 9 can thus be evacuated via the air evacuation channel 16 .
  • the spring 22 presses the spindle-shaped component 11 back into its operational position.
  • an injection channel 23 is provided in the spindle-shaped component 11 for the purpose of feeding back the yarn 2 , the injection channel 23 runs into the yarn withdrawal channel 10 and is directed to the entry opening 14 .
  • the injection channel 23 is subjected to compressed air during the piecing process and generates an air stream in the yarn withdrawal channel 10 and in the fibre feed channel 8 , which flows in the opposite direction to the spinning direction to the drafting device 4 . It is important that the injection channel 23 extends at an acute angle to the yarn withdrawal channel 10 , before it runs into the same, so that the injection effect in the yarn withdrawal channel 10 is sufficient to ensure that the backward fed end of the yarn 2 is reliably sucked in. It can be advantageous to subject the injection channel 23 to compressed air already during the above described cleaning process in order to facilitate the cleaning of the vortex chamber 9 .
  • the injection channel 23 is formed by a surface area 24 of the base body 12 and a surface area 25 of the tip 13 .
  • the spindle-shaped component 11 is formed by the components base body 12 and tip 13 .
  • This is advantageous as the tip 13 , in particular in the area of the entry opening 14 of the yarn withdrawal channel 10 , is liable to a high degree of wear and is thus made from a wear-resistant material.
  • a substantially cylindrical take-up part 26 is provided, via which the tip 13 is connected with the base body 12 .
  • the fixing of the tip 13 can hereby for example occur by using of a press fit or by using a screw thread on the take-up part 26 .
  • a sealing ring 27 can be provided, which, for example, can be made of copper.
  • the exemplary embodiment of the injection channel 23 according to the present invention gives rise to a particularly simple produceability of the spindle-shaped component 11 , as the surface area 24 is machined during the making of the base body 12 , while the surface area 25 is machined during the making of the tip 13 .
  • the surface areas 24 and 25 of the injection channel 23 are machined separately from one another before the spindle-shaped component 11 is assembled and give rise to the injection channel 23 only then when the tip 13 and the base body 12 are joined together.
  • the injection channel 23 with its small cross section is not produced in its entirety, but rather is formed first when the surface areas 24 and 25 are arranged to one another when the spindle-shaped component 11 is assembled. When the cross section of the injection channel 24 is viewed, it can be seen that a part of its peripheral wall is formed by the surface area 24 of the base body 12 and another part of its peripheral wall is formed by the surface area 25 of the tip 13 .
  • the surface area 24 of the base body 12 has a cone-shaped form, so that the injection channel 23 extends at an acute angle to the yarn withdrawal channel 10 and is directed towards the entry opening 14 .
  • the surface area 25 can be designed as a groove in the tip 13 .
  • the groove-shaped surface area 25 is arranged to the cone-shaped surface area 24 , through which the injection channel 23 is formed.
  • the surface area 25 may also have a cone-shaped form, and surround the cone-shaped surface area 24 at a short distance therefrom. This is denoted by the broken line with the reference number 25 ′. This would result, instead of a single injection channel 23 , in a ring-shaped injection channel 23 extending around the yarn withdrawal channel 10 .
  • a groove 28 is provided in the area of the take-up part 26 , which extends parallel to the yarn withdrawal channel 10 , the groove 28 being connected with a ring channel 29 and an intermediary channel 30 .
  • the intermediary channel 30 is connected in turn with a ring channel 31 which surrounds the base body 12 of the spindle-shaped component 11 , which ring channel 31 can be supplied with the necessary compressed air via a conduit 32 .
  • a number of groove-shaped surface areas 25 and correspondingly of grooves 28 are arranged around the yarn withdrawal channel 10 .
  • four groove-shaped surface areas 25 can be arranged evenly around the yarn withdrawal channel 10 .
  • the groove-shaped surface areas 25 at the tip 13 as well as the groove 28 can be particularly advantageously created without machining at the tip 13 . This is, for example, possible by using a punching process or by direct production of the tip 13 in a moulding tool. The production of the tip 13 is hereby very simply achieved in comparison to the above mentioned prior art.
  • FIG. 2 a further exemplary embodiment of the spindle-shaped component 11 and the injection channel 23 is shown. Identical parts have the same reference numbers as in FIG. 1 . In order to avoid repetition, reference shall be made to the description accompanying FIG. 1 .
  • a groove 33 in the base body 12 in the area of the take-up part 26 is provided in order to supply the injection channel 23 with compressed air from the ring channel 29 .
  • the injection channel 23 is formed by a cone-shaped surface area 35 at the tip 13 and by a groove-shaped surface area 34 of the base body 12 .
  • the application of the groove 33 and the groove-shaped surface area 34 in the base body 12 can be advantageous when the tip 13 is made of a material which is difficult to form, for example ceramic.
  • the groove-shaped surface area 34 is arranged to the cone-shaped surface area 35 during the assembly of the tip 13 onto the base body 12 , so that the injection channel 23 is formed.
  • the surface area 34 of the base body 12 also has a cone-shaped form, and is arranged at a short distance to the cone-shaped surface area 35 .
  • the groove 33 or the groove-shaped surface are 34 at the base body 12 can be advantageously formed by milling.
  • a number of grooves 33 and groove-shaped surface areas 34 can of course also be arranged around the yarn withdrawal channel 10 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US11/783,877 2006-04-13 2007-04-12 Spindle-shaped component for an air-jet spinning arrangement with an injection channel Abandoned US20070227116A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006018249A DE102006018249A1 (de) 2006-04-13 2006-04-13 Spindelförmiges Bauteil für eine Luftdüsenspinnvorrichtung mit einem Injektionskanal
DE102006018249.9 2006-04-13

Publications (1)

Publication Number Publication Date
US20070227116A1 true US20070227116A1 (en) 2007-10-04

Family

ID=38222651

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/783,877 Abandoned US20070227116A1 (en) 2006-04-13 2007-04-12 Spindle-shaped component for an air-jet spinning arrangement with an injection channel

Country Status (6)

Country Link
US (1) US20070227116A1 (fr)
EP (1) EP1845180B1 (fr)
JP (1) JP2007284861A (fr)
CN (1) CN101054744B (fr)
AT (1) ATE432381T1 (fr)
DE (2) DE102006018249A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070125062A1 (en) * 2003-10-20 2007-06-07 Maschinenfabrik Rieter Ag Air-jet spinning device
US20080190089A1 (en) * 2004-09-09 2008-08-14 Gerd Stahlecker Airjet Spinning Arrangement
US20080276594A1 (en) * 2005-09-19 2008-11-13 Maschinenfabrik Rieter Ag Air Jet Aggregate for an Air Jet Spinning Arrangement
US20110173945A1 (en) * 2008-09-29 2011-07-21 Peter Schweier Airjet spinning unit comprising a spindle-shaped component
US20120192541A1 (en) * 2009-07-17 2012-08-02 Maschinenfabrik Rieter Ag Component For An Air Jet Spinning Device
EP2677070A1 (fr) * 2012-06-22 2013-12-25 Murata Machinery, Ltd. Corps d'arbre de guidage creux, fileuse à air et machine de renvideur de fil comprenant celle-ci
CN107338518A (zh) * 2016-04-29 2017-11-10 塞维欧纺织机械股份公司 喷气式纺纱设备

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011053837A1 (de) * 2011-09-21 2013-03-21 Maschinenfabrik Rieter Ag Spinnspitze für eine Hohlspindel einer Luftspinnmaschine
DE102012101001A1 (de) * 2012-02-08 2013-08-08 Maschinenfabrik Rieter Ag Garnbildungselement für eine Spinnstelle einer Luftspinnmaschine mit einer wendelförmigen Führung sowie Verfahren zur Herstellung eines Garns

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5146740A (en) * 1990-02-20 1992-09-15 Murata Kikai Kabushiki Kaisha Spinning apparatus
US5159806A (en) * 1989-11-14 1992-11-03 Murata Kikai Kabushiki Kaisha Apparatus for producing spun yarns
US6029435A (en) * 1997-04-24 2000-02-29 Murata Kikai Kabushiki Kaisha Threading apparatus
US7080502B2 (en) * 2002-12-17 2006-07-25 Maschinenfabrik Rieter Ag Arrangement for producing a spun thread
US20070125062A1 (en) * 2003-10-20 2007-06-07 Maschinenfabrik Rieter Ag Air-jet spinning device
US20080072562A1 (en) * 2004-08-20 2008-03-27 Olivier Wust Spindle With Injector Duct And Piecing Method For An Airjet Spinning Machine

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JPS6183324A (ja) * 1984-09-26 1986-04-26 Toray Eng Co Ltd 繊維分離管
DE3734566C2 (de) * 1987-10-13 1994-10-06 Rieter Ingolstadt Spinnerei Drallorgan für das Verspinnen von Fasern zu einem Faden
JP2930010B2 (ja) * 1996-05-16 1999-08-03 村田機械株式会社 紡績機のピーシング方法及びその装置
EP1217109A3 (fr) * 2000-12-22 2003-04-02 Maschinenfabrik Rieter Ag Dispositif de filage
DE10333411A1 (de) * 2003-07-15 2005-02-03 Wilhelm Stahlecker Gmbh Vorrichtung zum Herstellen eines gesponnenen Fadens aus einem Stapelfaserverband
DE102004044345A1 (de) * 2004-09-09 2006-03-16 Wilhelm Stahlecker Gmbh Luftdüsenspinnvorrichtung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5159806A (en) * 1989-11-14 1992-11-03 Murata Kikai Kabushiki Kaisha Apparatus for producing spun yarns
US5146740A (en) * 1990-02-20 1992-09-15 Murata Kikai Kabushiki Kaisha Spinning apparatus
US6029435A (en) * 1997-04-24 2000-02-29 Murata Kikai Kabushiki Kaisha Threading apparatus
US7080502B2 (en) * 2002-12-17 2006-07-25 Maschinenfabrik Rieter Ag Arrangement for producing a spun thread
US20070125062A1 (en) * 2003-10-20 2007-06-07 Maschinenfabrik Rieter Ag Air-jet spinning device
US20080072562A1 (en) * 2004-08-20 2008-03-27 Olivier Wust Spindle With Injector Duct And Piecing Method For An Airjet Spinning Machine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070125062A1 (en) * 2003-10-20 2007-06-07 Maschinenfabrik Rieter Ag Air-jet spinning device
US20080190089A1 (en) * 2004-09-09 2008-08-14 Gerd Stahlecker Airjet Spinning Arrangement
US20080276594A1 (en) * 2005-09-19 2008-11-13 Maschinenfabrik Rieter Ag Air Jet Aggregate for an Air Jet Spinning Arrangement
US20110173945A1 (en) * 2008-09-29 2011-07-21 Peter Schweier Airjet spinning unit comprising a spindle-shaped component
US20120192541A1 (en) * 2009-07-17 2012-08-02 Maschinenfabrik Rieter Ag Component For An Air Jet Spinning Device
EP2677070A1 (fr) * 2012-06-22 2013-12-25 Murata Machinery, Ltd. Corps d'arbre de guidage creux, fileuse à air et machine de renvideur de fil comprenant celle-ci
CN103510195A (zh) * 2012-06-22 2014-01-15 村田机械株式会社 中空引导轴体、气流纺纱装置及具备它们的纱线卷绕机
CN107338518A (zh) * 2016-04-29 2017-11-10 塞维欧纺织机械股份公司 喷气式纺纱设备

Also Published As

Publication number Publication date
DE502007000760D1 (de) 2009-07-09
JP2007284861A (ja) 2007-11-01
CN101054744B (zh) 2011-11-23
EP1845180B1 (fr) 2009-05-27
EP1845180A3 (fr) 2008-05-28
DE102006018249A1 (de) 2007-10-18
EP1845180A2 (fr) 2007-10-17
CN101054744A (zh) 2007-10-17
ATE432381T1 (de) 2009-06-15

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Legal Events

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AS Assignment

Owner name: MASCHINENFABRIK RIETER AG, SWITZERLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:STAHLECKER, GERD;REEL/FRAME:019437/0495

Effective date: 20070417

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION