EP1802791A1 - Dispositif de filage a buses d'air - Google Patents

Dispositif de filage a buses d'air

Info

Publication number
EP1802791A1
EP1802791A1 EP05795954A EP05795954A EP1802791A1 EP 1802791 A1 EP1802791 A1 EP 1802791A1 EP 05795954 A EP05795954 A EP 05795954A EP 05795954 A EP05795954 A EP 05795954A EP 1802791 A1 EP1802791 A1 EP 1802791A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
thread
insert
air jet
jet spinning
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Withdrawn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
EP05795954A
Other languages
German (de)
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
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 EP1802791A1 publication Critical patent/EP1802791A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • 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

Definitions

  • the invention relates to an air jet spinning device for producing a spun yarn from a staple fiber strand, having a substantially hollow cylindrical vortex chamber, whose peripheral wall in the inlet region of the staple fiber composite contains a contact surface for a peripheral surface of a rotationally symmetrical insert, wherein in the circumferential surface a plurality of nozzle slots are incorporated, through the contact surface are completed to closed compressed air channels whose nozzle-like orifices are arranged on the vortex chamber facing the end face of the insert.
  • the compressed air channels have been drilled so far. Since these bores have very small diameters in the range of 0.5 to 0.6 mm and must be at least 3 mm long for fluidic reasons, results between the length of the Bohrunge n and the diameter of a ratio which is greater than 5. Regarding the production are downright deep holes, which are relatively difficult to produce. This difficulty is further increased if the holes with respect to the yarn path not only tangential, but with a further component to extend axially.
  • air jet spinning devices which are incorporated as slots in the peripheral wall of a component and only during assembly by covering the slots by means of another component to the compressed air channels be completed.
  • rectilinear slots are incorporated in conical surfaces and subsequently covered by a correspondingly shaped conical surface.
  • the compressed air channels of the latter type have the advantage that they can be easily manufactured in a very simple manner. Since the compressed air channels are exposed before assembly in the form of the nozzle slots, they can also be checked in a simple manner with respect to their accuracy 'and optionally reworked. During this check also faulty cuts can be sorted out.
  • the invention is based on the object to provide while maintaining the advantages of DE 37 32 708 A1 for an air jet spinning nozzle nozzle channels, which are further optimized and through the nozzle-like mouths the spinning rotation issuing compressed air with the largest possible tangential component in the Vortex chamber enters.
  • the object is achieved in that the nozzle slots are formed in the manner of a multi-thread.
  • a kinematic reversal should be mitgetropic in which the nozzle slots are mounted in the manner of a multi-thread not in said insert, but in the surrounding contact surface contact.
  • the embodiment is particularly simple if the thread is incorporated in a peripheral surface formed as a cylinder. In itself, more or less conical or spherical peripheral surfaces are possible, but the cylindrical shape is particularly easy to produce. A cylindrical shape also makes it possible to use the insert axially within certain limits shift, which changes the height of the vortex chamber, which affects the character of the spun thread.
  • the depth of the multi-flight thread forming the nozzle slots may vary throughout the length of the nozzle slots.
  • nozzle channels can be made in which narrows the depth of the thread from the inlet to the outlet.
  • the nozzle slots can be widened to the outlet, for example, if the effect of a Laval nozzle to be generated.
  • nozzle slots are completed by covering by means of the contact surface during assembly to the finished nozzle channels.
  • FIG. 1 shows, in a high magnification, an axial section through an air jet unit of an air jet spinning device
  • FIG. 2 shows, in an even greater enlargement, an uncut view of the insert of FIG. 1, the nozzle slots incorporated in the circumferential wall as a multi-start thread being covered by a contact surface of the vortex chamber,
  • FIG. 3 shows a view in the direction of arrow III of Figure 2.
  • the air jet spinning device contains a delivery device 1 for feeding a staple fiber strand 2 to be spun and an air jet unit 3 in which the staple fiber strand 2 is given the rotation required to spin a thread 4.
  • the delivery device 1 includes a pair of delivery rollers 5, 6, which is upstream of the air nozzle unit 3 at a small distance and in which it may be the output rollers of a drafting system, not otherwise shown.
  • a drafting system warps in a known manner a fed sliver or a roving to a staple fiber strand 2 of the desired fineness.
  • the delivery device 1 may alternatively be a pair of pinch rollers of another drafting device or of another upstream aggregate.
  • With 7 is one Designated nip, at which the supplied in the delivery direction A staple fiber strand 2 is kept clamped before ' entering the air nozzle unit 3.
  • the air jet unit 3 generates for the yarn to be spun 4 its rotation and delivers the yarn 4 in the yarn withdrawal direction B by means of a pair of draw-off rollers, not shown.
  • the air jet unit 3 contains inter alia a Faserzu Switzerland 8 and a substantially hollow cylindrical vortex chamber 9.
  • a fluid means generates in the vortex chamber 9 by blowing compressed air by opening into the Wirbelkamrner 9 compressed air channels 10 a vortex flow.
  • the inflow direction of the compressed air is designated C.
  • the emerging from the nozzle-like orifices 13 of the compressed air channels 10 compressed air is discharged through an exhaust duct 14 which surrounds a spindle-shaped member 15 in an annular manner. In the spindle-shaped member 15, a thread withdrawal channel 16 is arranged.
  • a fiber guide surface 18 is arranged as a swirl barrier, which is eccentric to the yarn withdrawal channel 16 in the region of the inlet opening 19.
  • the fibers to be spun are held on the one hand in Stape lmaschine said 2 and so guided by the Faserzu vitrkanal 8 substantially without rotation distribution in the thread withdrawal channel 16.
  • the fibers are exposed to the effect of the swirling flow, being driven radially outward by them or at least their end regions from the inlet opening 19 of the yarn withdrawal channel 16.
  • the threads 4 so produced therefore exhibit a core of substantially longitudinally extending fibers or fiber portions without substantial rotation and an outer portion in which the fibers or fiber portions are rotated about the core.
  • a rotationally symmetrical insert 20 is provided for producing the compressed air channels 10, which is inserted with its peripheral surface 21 in a correspondingly adapted peripheral wall 22 of the vortex chamber 9.
  • the nozzle channels 10 are incorporated in the form of nozzle slots 24, which are completed after assembly by the peripheral wall 22 to the closed air channels 10. This will be explained below with reference to FIGS. 2 and 3.
  • Figures 2 and 3 show in very high magnification and uncut the rotationally symmetrical insert 20 in the region of said peripheral wall 22 of the vortex chamber 9.
  • the peripheral surface 21 of the insert 20 four nozzle slots 24 are incorporated, in the manner of a four-start thread, for example by turning on a lathe.
  • the nozzle-like orifices 13 of the compressed air channels 10 completed by the peripheral wall 22 of the swirl chamber 9 are arranged on the front side 25 of the insert 20 facing the swirl chamber 9.
  • the nozzle slots 24 begin at the mentioned annular space 11 and open at the end face 25 of the insert 20.
  • the pitch of the thread is chosen so that a pronounced component of the compressed air flow in the direction of the run of the thread 4 is present. It can be seen that in the embodiment of the nozzle slots 24 in the manner of a multi-thread thread inevitably also a pronounced compressed air component is formed, which rotates along the peripheral wall 22 of the vortex chamber 9.
  • the depth of the thread may remain constant over the length of the nozzle slots 24, but may increase or decrease if desired.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Abstract

L'invention concerne un dispositif de filage à buses d'air comprenant une chambre de turbulence sensiblement cylindrique et creuse. La paroi périphérique de cette chambre de turbulence forme une surface d'appui pour une surface périphérique d'une pièce d'insertion à symétrie de rotation, dans la zone d'entrée de la mèche de fibres discontinues. Plusieurs fentes de buse sont ménagées dans la surface périphérique de la pièce d'insertion et forment, avec ladite surface d'appui, des canaux à air comprimé fermés. Les ouvertures de type buses des canaux à air comprimé sont disposées au niveau de la face de la pièce d'insertion qui est orientée vers la chambre de turbulence. Selon l'invention, les fentes des buses se présentent sous la forme d'un filetage multiple.
EP05795954A 2004-10-19 2005-10-18 Dispositif de filage a buses d'air Withdrawn EP1802791A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004052206A DE102004052206A1 (de) 2004-10-19 2004-10-19 Luftdüsenspinnvorrichtung
PCT/EP2005/011192 WO2006042738A1 (fr) 2004-10-19 2005-10-18 Dispositif de filage a buses d'air

Publications (1)

Publication Number Publication Date
EP1802791A1 true EP1802791A1 (fr) 2007-07-04

Family

ID=35500843

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05795954A Withdrawn EP1802791A1 (fr) 2004-10-19 2005-10-18 Dispositif de filage a buses d'air

Country Status (6)

Country Link
US (1) US20080115476A1 (fr)
EP (1) EP1802791A1 (fr)
JP (1) JP2008517169A (fr)
CN (1) CN101374982A (fr)
DE (1) DE102004052206A1 (fr)
WO (1) WO2006042738A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007006674A1 (de) * 2007-02-10 2008-08-14 Oerlikon Textile Gmbh & Co. Kg Luftspinnvorrichtung
BG111020A (bg) * 2011-08-24 2013-02-28 ЕТ-"Д-А-Динко Бахов" Метод и устройство за изпридане на прежда с въздушен вихър
BG111170A (bg) * 2012-03-19 2013-09-30 "Д-А-ДИНКО БАХОВ" ЕТ"D-A-Dinko Bahov" Et Метод и устройство за изпридане на прежда с въздушен вихър
DE102012110315A1 (de) * 2012-10-29 2014-04-30 Maschinenfabrik Rieter Ag Garnbildungselement für eine Luftspinnmaschine mit einem Einsatz sowie damit ausgerüstete Spinndüse
CH712489A1 (de) * 2016-05-26 2017-11-30 Rieter Ag Maschf Garnbildungselement für eine Vorspinnmaschine sowie damit ausgerüstete Vorspinnmaschine.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994120A (en) * 1974-07-25 1976-11-30 Instytut Wlokniennictwa Apparatus for production of yarn from natural and chemical fibres
JPS58115130A (ja) * 1981-12-25 1983-07-08 Toyoda Autom Loom Works Ltd 仮撚ノズル
DE3732708A1 (de) * 1987-01-15 1988-07-28 Stahlecker Fritz Luftduese fuer pneumatisches falschdrallspinnen mit einem aus wenigstens zwei teilstuecken gebildeten fadenkanal
EP0418693A1 (fr) * 1989-09-21 1991-03-27 Maschinenfabrik Rieter Ag Tuyère d'un métier à filer à jet d'air

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006042738A1 *

Also Published As

Publication number Publication date
JP2008517169A (ja) 2008-05-22
WO2006042738A1 (fr) 2006-04-27
CN101374982A (zh) 2009-02-25
DE102004052206A1 (de) 2006-04-20
US20080115476A1 (en) 2008-05-22

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