EP1490539A1 - Dispositif de serrage pneumatique pour un assemblage de fibres et procede de serrage pneumatique d'un assemblage de fibres - Google Patents

Dispositif de serrage pneumatique pour un assemblage de fibres et procede de serrage pneumatique d'un assemblage de fibres

Info

Publication number
EP1490539A1
EP1490539A1 EP03718644A EP03718644A EP1490539A1 EP 1490539 A1 EP1490539 A1 EP 1490539A1 EP 03718644 A EP03718644 A EP 03718644A EP 03718644 A EP03718644 A EP 03718644A EP 1490539 A1 EP1490539 A1 EP 1490539A1
Authority
EP
European Patent Office
Prior art keywords
fiber structure
compression device
compression
groove
suction
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
EP03718644A
Other languages
German (de)
English (en)
Other versions
EP1490539B1 (fr
Inventor
Peter Artzt
Jürgen Schneider
Theo GRÜN
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.)
Oerlikon Textile GmbH and Co KG
Original Assignee
Saurer GmbH and Co KG
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 Saurer GmbH and Co KG filed Critical Saurer GmbH and Co KG
Publication of EP1490539A1 publication Critical patent/EP1490539A1/fr
Application granted granted Critical
Publication of EP1490539B1 publication Critical patent/EP1490539B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • D01H5/86—Aprons; Apron supports; Apron tensioning arrangements
    • 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
    • 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

Definitions

  • Pneumatic compression device for a fiber structure and method for pneumatic compression of a fiber structure
  • the invention relates to a pneumatic compression device for a fiber structure, which was preferably previously warped in a stretching plant of a spinning machine, according to the preamble of claim 1.
  • a so-called double apron drafting system is already known as general prior art (DE 43 23 472 C2).
  • the fiber structure leaving the pair of output rollers is exposed to a suction air flow running transversely to the transport direction over the length of the fiber bundling zone.
  • the fiber structure is acted upon by a flat transport means, which is designed as a perforated strap.
  • the apron can be driven by means of a roller drive.
  • the strapping leads to an strapping cage which is designed as a suction device.
  • the strappy cage has a groove closed on one side for guiding the suction air.
  • a support is provided which is designed as a rectangular profile. The support is adjustable; their inclination can be changed and thus the start of compaction can be regulated. With it, the air drawn in can be used as a lateral force component, which has an advantageous effect on the desired compression of the fiber structure.
  • the object of the present invention is to improve a compression device of the aforementioned type in the simplest and cheapest possible way.
  • a cover which has at least one guide means extending in the running direction of the fiber structure for the air causing the compression. This enables an air flow that preferably runs along the fiber structure and therefore excellent compression.
  • the guide means can be designed as a groove, for example, as elevations in the manner of a pair of rails, but preferably because of more cost-effective feasibility and material savings. If, in an embodiment of the invention, the cross-sectional area of the groove is significantly larger than the diameter of the fiber structure passing through the groove, on the one hand it is achieved that it offers little resistance to the sucked-in air and a strong air flow is established in it along the fiber structure running through it. On the other hand, it is achieved that the fiber structure does not slide along the flanks of the groove and is roughed there, for example. The fiber structure should therefore in no way be mechanically compressed by the groove.
  • the cross-sectional area of the groove can be angular or rounded. It advantageously tapers in the direction of the grain. Since air is sucked out of the groove over the course of the compression zone, it can be achieved that the speed of the air flow along the fiber structure in this compression zone remains approximately at the same level.
  • the flanks of the groove can be straight or convex, they can also funnel-like towards one another in an initial region and then run parallel.
  • a particularly strong air flow along the fiber structure is achieved if, in a further embodiment of the invention, care is taken to ensure that only such a distance is provided between the surface of the suction shoe that has the air inlet opening and the cover that allows the transport means to pass through without jamming. As a result, a lateral inflow of compression air, as is desired in known compression devices, is prevented as much as possible in contrast to this in the device according to the invention.
  • the invention is based on a compression device, which consists, for example, of a suction shoe with a vacuum connection and a perforated apron which is guided around a delivery roller as a means of transport.
  • the apron has several perforations arranged one behind the other in the running direction of the fiber structure. As soon as the fibers of the undensified fiber structure are caught by the suction air flow, they are pushed together and compressed by this.
  • FIG. 1 is a schematic side view of a double apron drafting system with inlet rollers, main drafting zone, compression device and delivery device,
  • FIG. 2 is an enlarged view of the compression device with suction shoe and suction connection in a schematic side view
  • Fig. 2a shows a detail of Fig. 2 in an enlarged view
  • FIG. 3 shows a detail of FIGS. 1 and 2 in plan view.
  • a drafting system 1 for a spinning machine for drawing and bundling a fiber structure 2 is shown. It has a first pair of rollers 3 and a second pair of rollers 4, which is followed by an output pair of rollers 5. The main distortion of the fiber structure 2 takes place in the area between the second pair of rollers 4 and the pair of output rollers 5.
  • a pneumatic compaction device 10 connects to the output roller pair 5.
  • a delivery device 20 which in turn has a pair of rollers 6.
  • the fiber structure 2 is in the direction of the arrow transported between and through the pairs of rollers 3, 4, 5 and 6, which can preferably be driven by an electric motor in a known manner.
  • a transport means 15 provided with perforations 16, which is designed here as an apron, is used, as is known, for example, from DE 197 22 528 A1 already mentioned above.
  • the area between the output roller pair 5 and the roller pair 6 of the delivery device 20 is a so-called fiber bundling zone 7.
  • the fiber assembly 2 leaving the output roller pair 5 of the drafting device 1 is exposed to a suction air stream 8 (FIG. 3).
  • the suction air flow 8 is generated by a suction device 9, which extends on the side of the transport means 15 facing away from the fiber structure 2 between the pair of output rollers 5 and the delivery device 20.
  • the suction device 9 has a suction shoe 17, over which the perforated strap, ie the transport means 15, is guided.
  • the perforations 16 of the transport means 15 preferably run at least over the width of a traverse of the fiber structure 2 emerging from the pair of output rollers 5, which is guided accordingly over the suction opening of the suction shoe 17 of the suction device 9.
  • the suction shoe 17 is positioned between the pairs of rollers 5 and 6 in such a way that it is closer to the center points (of the rollers arranged at the bottom in cross section, as is generally the case) than at the rollers arranged at the top.
  • the suction shoe 17 thus projects relatively far down into the fiber bundling zone 7.
  • a cover 30 is arranged opposite the suction opening of the suction device 9.
  • the cover 30 is designed like a rail and extends over the entire width of the drafting unit 1. It itself has a width B which is matched to the size of the suction opening of the suction device, in particular approximately the same size as in the running direction of the fiber structure 2.
  • the suction shoe 17 is supported with a nose 19 on the cover 30, as shown in FIG. 2a.
  • the cover 30 is curved downward and viewed in the running direction of the fiber structure 2, slightly higher at the rear than at the front.
  • the cover 30 has guide means 31, 31 ' for the fiber structure 2.
  • the guide means 31, 31 ' are designed as grooves and extend with their length L straight in the running direction of the fiber structure 2 over the entire width B of the cover 30.
  • the width of the grooves 31, 31 ' is matched to the thickness of the fiber structure 2; 3, its cross section is significantly larger than that of the fiber structure 2 passing through it.
  • the grooves 31 are rectangular in cross section and initially have a width b1 which is approximately twice as large as the thickness of the undensified fiber structure 2. After about a quarter of their length L, the grooves 31 narrow to a width b2 which is approximately half the width b1. The flanks 32 of the grooves 31 thus approach one another in the input region of the fiber structure 2 and then continue to run parallel to one another.
  • the groove depth corresponds here at least approximately to the thickness of the undensified fiber structure 2.
  • a groove 31 ' is shown, the flanks 32 ' of which are convexly curved. Otherwise, the groove 31 'is the same as the grooves 31.
  • the grooves 31, 31 ' are thus constructed like a suction channel, in which a strong air flow is established along the continuous fiber structure 2. This enables excellent compression of the fiber structure 2.
  • the fiber structure 2 can not only be exposed to an air flow in the fiber running direction as described above, but also or later to an air flow transversely to it in order to achieve the best possible compression.
  • the speed of the air causing the compression should be many times higher than the speed of the continuous fiber structure 2. It can be up to ten times the speed of the fiber structure. In practice, it has proven to be very effective to select the speed of the air causing the compression to be approximately twice as high as the speed of the fiber structure 2 passing through.
  • a great advantage of the device according to the invention and the method according to the invention is that the air requirement compared to known devices and methods is reduced precisely because of the guide means according to the invention for the air causing the compression, thereby ensuring more economical working.
  • blown air can also be used to support the compression effect of the suction air. This enables an even better compression of the fiber structure and ultimately an even higher yarn quality.
  • the invention can of course also be used with compaction devices which have transport means, for example in the form of a sieve strap.
  • the suction opening is then preferably designed as a narrow, straight or inclined suction slot. At oblique horizontal suction slot, the groove must of course be placed on the slanted position of the slot.
  • the invention can also be used in compaction devices which have transport means, for example in the form of a rigid, driven drum or in the form of a circumferential sleeve, which have a screen surface or a perforation track.

Landscapes

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

Abstract

L'invention concerne un dispositif de serrage pneumatique (10) et un procédé de serrage pneumatique d'un assemblage de fibres (2), de préférence étiré au préalable dans une zone d'un banc d'étirage (1) d'un métier à filer. Ce dispositif comporte un moyen de transport (15) pour l'assemblage de fibres (2) et une pièce de recouvrement (30), présentant au moins un moyen de guidage (31, 31') pour l'air destiné au serrage, lequel moyen de guidage s'étend dans le sens de l'assemblage de fibres (2). On obtient ainsi un excellent serrage de cet assemblage de fibres.
EP03718644A 2002-04-02 2003-03-29 Dispositif de serrage pneumatique pour un assemblage de fibres et procede de serrage pneumatique d'un assemblage de fibres Expired - Lifetime EP1490539B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10214641 2002-04-02
DE2002114641 DE10214641B4 (de) 2002-04-02 2002-04-02 Pneumatische Verdichtungseinrichtung für einen Faserverband und Verfahren zum pneumatischen Verdichten eines Faserverbandes
PCT/DE2003/001041 WO2003083192A1 (fr) 2002-04-02 2003-03-29 Dispositif de serrage pneumatique pour un assemblage de fibres et procede de serrage pneumatique d'un assemblage de fibres

Publications (2)

Publication Number Publication Date
EP1490539A1 true EP1490539A1 (fr) 2004-12-29
EP1490539B1 EP1490539B1 (fr) 2006-05-10

Family

ID=28458538

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03718644A Expired - Lifetime EP1490539B1 (fr) 2002-04-02 2003-03-29 Dispositif de serrage pneumatique pour un assemblage de fibres et procede de serrage pneumatique d'un assemblage de fibres

Country Status (6)

Country Link
EP (1) EP1490539B1 (fr)
JP (1) JP4156525B2 (fr)
CN (1) CN100352983C (fr)
DE (1) DE10214641B4 (fr)
ES (1) ES2261930T3 (fr)
WO (1) WO2003083192A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10322575A1 (de) * 2003-05-20 2004-12-09 Saurer Gmbh & Co. Kg Ringspinnmaschine mit Verdichtungsvorrichtungen
DE102005045451B4 (de) * 2005-09-22 2008-05-08 Oerlikon Textile Gmbh & Co. Kg Vorrichtung zum Verdichten eines Faserverbandes
CN104131371A (zh) * 2014-07-07 2014-11-05 吴江市金桥纺织品有限公司 一种集聚纺纱装置
DE102019113796A1 (de) * 2019-05-23 2020-11-26 Saurer Spinning Solutions Gmbh & Co. Kg Verdichtungsvorrichtung für eine Spinnmaschine, Streckwerk mit der Verdichtungsvorrichtung und Verfahren zum Betreiben der Verdichtungsvorrichtung
DE102019128326A1 (de) * 2019-10-21 2021-04-22 Saurer Spinning Solutions Gmbh & Co. Kg Verdichtungsvorrichtung für ein Streckwerk einer Spinnmaschine sowie Streckwerk für eine Verdichtungsvorrichtung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4323472C2 (de) * 1993-07-14 1997-08-07 Inst F Textil Und Verfahrenste Doppelriemchen-Streckwerk
DE4426278B4 (de) * 1994-07-25 2007-02-01 Maschinenfabrik Rieter Ag Spinnmaschine mit Kondensationsstufe
DE4447969B4 (de) * 1994-07-25 2006-06-22 Maschinenfabrik Rieter Ag Spinnmaschine mit Saugluftleitmitteln zur Faserverband-Kondensation
DE19722528C2 (de) * 1997-03-08 2003-09-25 Inst Textil & Faserforschung Doppelriemchen-Streckwerk
DE19856121C2 (de) * 1998-12-04 2003-12-18 Zinser Textilmaschinen Gmbh Verfahren und Vorrichtung zur Herstellung von verdichtetem Garn
DE10008610A1 (de) * 2000-02-24 2001-08-30 Zinser Textilmaschinen Gmbh Streckwerk für eine Spinnereimaschine
DE10042689A1 (de) * 2000-08-31 2002-03-14 Fritz Stahlecker Vorrichtung zum Verdichten eines Faserverbandes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03083192A1 *

Also Published As

Publication number Publication date
WO2003083192A1 (fr) 2003-10-09
JP4156525B2 (ja) 2008-09-24
EP1490539B1 (fr) 2006-05-10
ES2261930T3 (es) 2006-11-16
CN1646744A (zh) 2005-07-27
JP2005521802A (ja) 2005-07-21
DE10214641A1 (de) 2003-10-23
DE10214641B4 (de) 2007-02-22
CN100352983C (zh) 2007-12-05

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