WO2005040466A1 - Dispositif destine a produire un file a partir d'une meche de fibres discontinues - Google Patents

Dispositif destine a produire un file a partir d'une meche de fibres discontinues Download PDF

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Publication number
WO2005040466A1
WO2005040466A1 PCT/EP2004/008966 EP2004008966W WO2005040466A1 WO 2005040466 A1 WO2005040466 A1 WO 2005040466A1 EP 2004008966 W EP2004008966 W EP 2004008966W WO 2005040466 A1 WO2005040466 A1 WO 2005040466A1
Authority
WO
WIPO (PCT)
Prior art keywords
compressed air
channel
inlet opening
thread
guide surface
Prior art date
Application number
PCT/EP2004/008966
Other languages
German (de)
English (en)
Inventor
Gerd Stahlecker
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 WO2005040466A1 publication Critical patent/WO2005040466A1/fr

Links

Classifications

    • 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 invention relates to a device for producing a spun thread from a staple fiber band, with a feed channel for feeding the staple fiber bandage, with a thread take-off channel having an inlet opening, which is arranged in a spindle-shaped component, with a swirl chamber connected to compressed air nozzles for generating a vortex flow around the inlet opening of the thread take-off duct, with an exhaust air duct surrounding the spindle-shaped component and with a fiber guide surface which acts as a twist lock and is arranged in the region of the inlet opening of the thread take-off duct, the compressed air emerging from the compressed air nozzles being switched off after an interruption of the spinning process and the spindle-shaped component being moved away from the fiber guide surface in the axial direction becomes.
  • a device of this type is state of the art through DE 195 01 545 C2.
  • a staple fiber dressing is drawn into a fiber ribbon in the drafting system, which is then given the spinning twist in an air nozzle unit.
  • the fiber ribbon is first passed through a feed channel of the air nozzle unit into a swirl chamber, which is assigned a fluid device for generating a swirl flow around an inlet opening of a thread take-off channel.
  • a swirl chamber which is assigned a fluid device for generating a swirl flow around an inlet opening of a thread take-off channel.
  • the front ends of the fibers held in the fiber ribbon are guided into the thread take-off channel, while the rear ends are free
  • the fiber ends are spread apart, caught by the vortex flow and rotated around the front ends that are already in the inlet opening of the thread take-off channel, that is to say incorporated, so that a thread with largely real rotation is produced.
  • the known device provides that after an interruption of the spinning process, the compressed air emerging from the compressed air nozzles is switched off and the spindle-shaped component is moved away from the fiber guide surface.
  • the area between the fiber guide surface and the inlet opening of the thread take-off channel because with the small distance that the inlet opening is in operation from the fiber guide surface, it often happens that a fiber or thread ball occurs when the thread breaks stuck in the narrow gap.
  • the removal of the thread take-off channel from the fiber guiding surface is very complex since the components mentioned are located in different housings which must be completely separated from one another if the spinning process is interrupted. The control for the separation of these housings takes place via an external mechanism.
  • the invention is based on the object of being able to clean the very narrow gap between the fiber guide surface and the inlet opening of the thread take-off channel when the spinning process is interrupted, without having to separate different housings from one another in a complex manner by external mechanisms.
  • the spindle-shaped component is partially designed as a piston of a piston-cylinder unit, which, when the compressed air is switched on, is pressed into an operating position in which the fiber guide surface lies in the region of the inlet opening of the thread take-off channel, and when the compressed air is switched off into a Is moved out of operation position, in which the inlet opening of the thread take-off channel is at an increased distance from the fiber guide surface.
  • a compression spring acts on the piston, which is tensioned when the compressed air is switched on and presses the piston into its non-operating position when the compressed air is switched off.
  • the compressed air supply for the compressed air nozzles is provided with a branch which is assigned to the piston-cylinder unit.
  • the spindle-shaped component is designed like a pneumatic piston, an overpressure can be applied to the spindle-shaped component during the spinning process and pressed into the spinning position and, in the event of thread breakage and a lack of excess pressure, being pressed away from the fiber guide element by means of a spring. Any fiber or thread balls in the area of the fiber guide surface can then easily, for example by blowing compressed air into the feed channel, because of the significantly increased distance from the inlet opening of the thread take-off channel removed and disposed of by the negative pressure of the exhaust air duct. No housings can be separated from each other for this, but the piston-cylinder unit is located completely inside the air nozzle unit. Furthermore, no external mechanism for operating these non-existent separable housings is required.
  • FIG. 1 shows a greatly enlarged illustration of a device according to the invention in axial section during operation
  • Figure 2 shows the same device in the same view in the non-operating state.
  • the device shown in FIG. 1 is used to produce a spun thread 1 from a staple fiber dressing 2.
  • the essential components include a drafting device 3 and an air nozzle unit 4.
  • the staple fiber structure 2 to be spun is fed to the drafting device 3 in the direction of delivery A and drawn off as spun thread 1 in the direction of take-off B and passed on to a winding device (not shown).
  • the drafting system 3 which is only partially shown, is preferably a three-cylinder drafting system and thus contains a total of three pairs of rollers, each of which contains a driven lower roller and an upper roller designed as a pressure roller. Only the delivery roller pair 5, 6 is shown.
  • a staple fiber structure 2 is warped in a known manner to a desired fineness. Following the drafting unit 3, there is then a thin fiber ribbon 7, which is stretched and still untwisted.
  • the fiber ribbon 7 is fed to the air nozzle unit 4 via a feed channel 8.
  • a so-called swirl chamber 9 follows, in which the fiber ribbon 7 is given the spinning twist, so that the spun thread 1 is produced, which is drawn off through a thread take-off channel 10.
  • a fluid device generates a vortex flow in the vortex chamber 9 by blowing compressed air through tangential air nozzles 11 opening tangentially into the vortex chamber 9.
  • the compressed air emerging from the nozzle openings is discharged through an exhaust air duct 12 has an annular cross section around a spindle-shaped component 13 which is stationary during operation and which contains the thread take-off channel 10.
  • an edge of a fiber guide surface 14 is arranged as a twist lock, which is arranged slightly eccentrically to the thread take-off channel 10 in the area of its inlet opening 15.
  • the fibers to be spun are held on the one hand in the fiber ribbon 7 and thus guided from the feed channel 8 into the thread take-off channel 10 essentially without giving rotation, but on the other hand the fibers in the area between the feed channel 8 and the thread take-off channel 10 are exposed to the effect of the vortex flow.
  • the fibers or at least their end regions are driven radially away from the inlet opening 15 of the thread take-off channel 10.
  • the threads 1 produced with the described device thereby show a core of fibers or fiber regions running essentially in the longitudinal direction of the thread without substantial rotation and an outer region in which the fibers or fiber regions are rotated around the core.
  • a device of this type allows very high spinning speeds, which can be in the order of 600 m / min.
  • the compressed air emerging from the compressed air nozzles 11 into the swirl chamber 9 is passed to the air nozzle assembly 4 via a compressed air duct 16 in the feed direction C. From the compressed air duct 16, the compressed air first arrives in an annular duct 17 surrounding the swirl chamber 9, to which said compressed air nozzles 11 are directly connected.
  • the spindle-shaped component 13 is arranged to be displaceable in the axial direction.
  • the spindle-shaped component 13 is partially designed as a piston 18 of a piston-cylinder unit 19.
  • the latter works with compressed air, for which purpose the compressed air duct 16 is provided with a branch 20, which opens into a pressure chamber 22 via a connecting duct 21.
  • This pressure chamber 22 is provided with a plus sign in FIG. 1 and is located on that side of the piston 18 which faces away from the inlet opening 15 of the thread take-off channel 10.
  • the exhaust air duct 12 is provided with a minus sign in order to make it clear that there is a negative pressure area here.
  • the overpressure in the overpressure chamber 22 presses the piston 18 and the component 13 firmly connected to it against a stop 23 during operation. As a result, under the effect of the overpressure, the small distance xi between the fiber guide surface 14 and the inlet opening 15 of the thread take-off channel 10 is fixed during operation.
  • the spindle-shaped component 13 is thus moved away from the fiber guide surface 14 in the axial direction when the spinning process is interrupted.
  • the piston 18 reaches the stop 25
  • the inlet opening 15 of the thread take-off channel 10 is at an increased distance x 2 from the fiber guide surface 14.
  • This increased distance x 2 is large enough that any air or fiber balls can be blown away from the area between the fiber guide surface 14 and the inlet opening 15 of the thread take-off channel 10 from the outside by pressurized air. You get into the exhaust air duct 12, which is still connected to a vacuum source, not shown, and are disposed of in this simple manner.

Landscapes

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

Abstract

L'invention concerne un dispositif destiné à produire un filé à partir d'une mèche de fibres discontinues, lequel dispositif comprend un canal d'alimentation servant à l'acheminement de la mèche de fibres discontinues et un canal de dévidage du filé pourvu d'un orifice d'admission. Ce canal de dévidage est ménagé dans un composant en fuseau entouré d'un canal d'évacuation d'air. Une chambre de turbulence, raccordée à des buses à air comprimé, produit un courant tourbillonnaire autour de l'orifice d'admission du canal de dévidage du filé. Une surface de guidage des fibres, agissant comme une barrière de torsion, est placée dans la zone de l'orifice d'admission. La distance entre cette surface de guidage des fibres et l'orifice d'admission du canal de dévidage du filé étant très petite, il arrive souvent que, lors d'une rupture de fil, des pelotes de fibres ou de fils se forment dans cette zone. Le composant en biseau peut donc être éloigné de la surface de guidage des fibres dans le sens axial après une interruption du filage. A cet effet, ce composant en fuseau est partiellement conçu sous la forme d'un piston qui est poussé dans une position de fonctionnement lorsque l'alimentation en air comprimé est ouverte et déplacé sous l'effet d'un ressort de pression, lorsque l'alimentation en air comprimé est fermée, dans une position d'arrêt où l'orifice d'admission du canal de dévidage du filé se trouve à une plus grande distance de la surface de guidage des fibres.
PCT/EP2004/008966 2003-09-23 2004-08-11 Dispositif destine a produire un file a partir d'une meche de fibres discontinues WO2005040466A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10346226.0 2003-09-23
DE2003146226 DE10346226A1 (de) 2003-09-23 2003-09-23 Vorrichtung zum Herstellen eines gesponnenen Fadens aus einem Stapelfaserverband

Publications (1)

Publication Number Publication Date
WO2005040466A1 true WO2005040466A1 (fr) 2005-05-06

Family

ID=34306274

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/008966 WO2005040466A1 (fr) 2003-09-23 2004-08-11 Dispositif destine a produire un file a partir d'une meche de fibres discontinues

Country Status (2)

Country Link
DE (1) DE10346226A1 (fr)
WO (1) WO2005040466A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013002023A (ja) * 2011-06-20 2013-01-07 Murata Mach Ltd 中空ガイド軸体ユニット、空気紡績装置及び紡績機
ITUA20163011A1 (it) * 2016-04-29 2017-10-29 Savio Macch Tessili Spa Dispositivo di filatura di tipo air-jet

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19501545A1 (de) * 1994-01-25 1995-07-27 Murata Machinery Ltd Verfahren zum Andrehen von Garn in einer Spinnmaschine
DE19532619A1 (de) * 1994-09-05 1996-03-07 Murata Machinery Ltd Spinnverfahren und -maschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19501545A1 (de) * 1994-01-25 1995-07-27 Murata Machinery Ltd Verfahren zum Andrehen von Garn in einer Spinnmaschine
DE19532619A1 (de) * 1994-09-05 1996-03-07 Murata Machinery Ltd Spinnverfahren und -maschine

Also Published As

Publication number Publication date
DE10346226A1 (de) 2005-04-14

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