EP4339341A1 - Luftspinnmaschine sowie streckwerkeinheit für eine spinnstelle einer luftspinnmaschine - Google Patents

Luftspinnmaschine sowie streckwerkeinheit für eine spinnstelle einer luftspinnmaschine Download PDF

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Publication number
EP4339341A1
EP4339341A1 EP23192964.7A EP23192964A EP4339341A1 EP 4339341 A1 EP4339341 A1 EP 4339341A1 EP 23192964 A EP23192964 A EP 23192964A EP 4339341 A1 EP4339341 A1 EP 4339341A1
Authority
EP
European Patent Office
Prior art keywords
air
bearing element
lower roller
spinneret
drafting unit
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.)
Pending
Application number
EP23192964.7A
Other languages
German (de)
English (en)
French (fr)
Inventor
Lars Lindemann
Eduard Prediger
Michael Reimann
Philipp Schiffers
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.)
Saurer Intelligent Technology AG
Original Assignee
Saurer Intelligent Technology 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 Saurer Intelligent Technology AG filed Critical Saurer Intelligent Technology AG
Publication of EP4339341A1 publication Critical patent/EP4339341A1/de
Pending 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
    • 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
    • D01H4/30—Arrangements for separating slivers into fibres; Orienting or straightening fibres, e.g. using guide-rolls
    • 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
    • D01H5/56—Supports for drafting elements
    • 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
    • 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
    • D01H5/74—Rollers or roller bearings

Definitions

  • Drafting units for textile machines are known in various designs from the prior art. They serve to stretch or distort a sliver, thereby reducing the cross-section of the fiber. During the draft, the fibers must be moved against each other as evenly as possible in order to achieve a sliver that is as uniform as possible.
  • the drafting unit units usually have several pairs of rollers arranged one after the other, which, arranged next to one another, clamp the sliver running between them.
  • a pair of rollers usually consists of a driven lower roller arranged on a lower roller carrier and an upper roller resting on the lower roller and arranged on a pivotable load carrier, which is rotatably held by the load carrier.
  • a distortion of the sliver is achieved in that in the direction of transport of the sliver through the drafting unit, which is determined by the direction of rotation of the pairs of rollers, the peripheral speed increases from pair of rollers to pair of rollers.
  • the sliver When air spinning using a spinning machine for spinning a thread, the sliver is typically drawn according to the yarn fineness to be achieved using the drafting unit and then fed to an air spinneret of an air spinning device. Within the air spinning device, the outer fibers of the sliver are wound around the inner core fibers of the sliver using a vortex air flow generated by the air spinneret, thereby forming the thread strength required for the sliver Thread's crucial wrapping fibers. The thread formed in this way is finally drawn off via a discharge channel of the air-jet spinning device and, for example, wound up on a sleeve.
  • the air spinning nozzle is arranged downstream of the output roller pair of the drafting unit on the lower roller support of the drafting unit in the transport direction of the sliver.
  • the air spinneret To arrange the air spinneret on the lower roller carrier, it is known to use holders to be connected to the lower roller carrier and adapted to this, on which the air spinneret is pivotably arranged, so that it is transported between an operating position in which the sliver emerging from the pair of output rollers is conveyed into the air spinneret and can be adjusted to a maintenance position. In the maintenance position, for example, it is possible to easily clean the area between the spinneret and the pair of output rollers.
  • the sliver produced for example, from a draw frame, the so-called draw sliver
  • the roving machine comprises an air-jet spinning device, as described above, for example, wherein the dimensioning and the flow conditions of the air-jet spinning device for producing the roving are suitably adapted to an air-jet spinning device for producing a thread.
  • the operation of such an air-jet spinning device of the roving machine for producing a roving is similar to that of the air-jet spinning devices of air-jet spinning machines for producing a thread.
  • the invention is based on the object of providing a drafting unit for a spinning station of an air-jet spinning machine and an air-jet spinning machine which has a reliable pivotable air-jet spinning nozzle, which can be easily moved if necessary. can be detached from the lower roller carrier, in particular without tools.
  • the invention solves the problem by a drafting unit with the features of claim 1 and by an air-jet spinning machine with the features of claim 8.
  • Advantageous developments of the drafting unit are specified in the dependent claims 2 to 7.
  • the air-jet spinning machine can be a spinning machine which is designed to produce a thread which can be wound onto a package tube to form a package, in particular a so-called cheese.
  • the air-jet spinning machine can be a roving machine for producing a roving, for example as described at the beginning.
  • the air-jet spinning device is designed in such a way that the roving produced has a reversible protective twist.
  • a reversible protective twist is known to be characterized by the fact that the roving remains capable of being distorted for a further processing process, such as on the ring spinning machine, whereby the imparting of twist introduced can be released again if necessary.
  • the reversible protective rotation is usually achieved in such a way that the sliver fed to the air-jet spinning device is at least partially given a real twist by the air-jet spinning device. This means that at least some of the fibers of the supplied sliver receive a real twist, i.e. a rotation, in the course of the air-spinning process, which is achieved by means of the air flow generated in the air-spinning device.
  • the lower roller carrier comprises a bearing element having a free end, via which the air spinneret can be received and which forms a pivot axis for pivoting the air spinneret between an operating position and at least one second position spaced therefrom, the bearing element having one of the free end spaced section is connected to the lower roller carrier.
  • the second position is a position further away from the output roller than the operating position with respect to the operating position that defines the first position.
  • the second position can define a maintenance position in which maintenance activities, as described above by way of example, are feasible.
  • the second position may be a position different from the maintenance position.
  • the second position can be between the operating position and the maintenance position or a position further away from the output roller with respect to the maintenance position.
  • the second position is provided downstream of both the operating position and the maintenance position in a direction emanating from the output roller.
  • the second position can further preferably define an end position for the pivotable air spinneret, in which the air spinneret can have a maximum acceptable distance from the output roller.
  • the section for connection to the lower roller carrier can preferably be an end of the bearing element opposite the free end.
  • the bearing element is defined and can be designed cost-effectively.
  • the section can be a section lying between the free end and a further, in particular free, end of the bearing element opposite it. If necessary, this favors further arrangement options for further components on the bearing element.
  • the connection of the bearing element to the lower roller carrier via the section is fundamentally freely selectable.
  • the lower roller carrier has a fastening receptacle which is designed to receive the section of the bearing element. More preferably, at least the fastening receptacle or the section of the bearing element is designed to enable a stationary fixation of the bearing element on the lower roller carrier. This can be done, for example, via a screw fastening or clamp fixation, which is more preferably spring-loaded.
  • the design of the drafting unit according to the invention makes it possible to arrange the air spinneret in a simple manner on the lower roller carrier or to remove it from it.
  • To arrange the air spinneret on the lower roller carrier it simply needs to be pushed onto the bearing element via the free end with an opening adapted to the free end of the bearing element.
  • the air spinneret can be removed from the lower roller carrier by simply pushing the air spinneret off the bearing element over the free end.
  • the bearing element which is free at one end, thus allows easy assembly and disassembly of the air spinneret on the lower roller support and also offers the possibility of pivoting the air spinneret about the pivot axis formed by the bearing element between the operating position and the second position spaced therefrom.
  • One-sided storage of the bearing element on the lower roller carrier also allows a particularly precise and play-free alignment of the pivot axis relative to the lower roller carrier.
  • the bearing element has a stop element in a section opposite the free end.
  • a stop element for example in the form of a shoulder or flange that preferably at least partially or more preferably completely surrounds the pivot axis or the bearing element, allows an exact positioning of the air spinneret in the direction of its push-on onto the bearing element, so that the air spinneret is optimally opposite in the operating position the pair of output rollers can be arranged. A separate alignment can therefore be dispensed with.
  • the air spinneret is fixed in a secure position on the bearing element.
  • the securing of the position of the air spinneret can in principle be freely selectable.
  • the bearing element is designed in the region of its free end to accommodate a position securing element.
  • the position securing element can be a screw that can be screwed onto the free end of the bearing element, a snap ring that can be arranged on the free end of the bearing element or a, in particular spring-loaded, pressure piece.
  • Spring-loaded pressure pieces are well known and offer the advantage over a conventional clamping screw that the tip of the pressure piece is designed to be movable in a spring-loaded manner. As soon as a spring force acting on the tip of the pressure piece, which acts as a clamping force, is overcome, the tip moves in the direction of the pressure piece or into the pressure piece, whereby the component held by the spring-loaded pressure piece or the air spinneret is displaced on the bearing element can.
  • the bearing element and a carrier carrying the air spinneret which can be pushed onto the bearing element, can preferably have a tongue-and-groove locking mechanism, which works similarly to the preferred embodiment with the spring-loaded pressure piece, which runs along The pushing direction of the air spinneret then comes into engagement or disengagement when a defined force is overcome along the pushing direction.
  • no spring-loaded pressure element such as the tip of the spring-loaded pressure piece is provided.
  • a locking lever can be provided, which is arranged to be rotatably movable transversely to the push-on direction on the lower roller carrier in order to secure the air spinneret after positioning on the bearing element to avoid movement against the push-on direction.
  • a snap ring as a position securing element is characterized by the fact that, on the one hand, it ensures reliable positioning of the air spinneret on the bearing element and, on the other hand, enables simple and quick removal if necessary, so that the air spinneret can then be easily removed from the bearing element can.
  • the design of the bearing element forming the pivot axis for the air spinneret is fundamentally freely selectable. This can also be made in one piece with the lower roller carrier. According to a preferred embodiment of the invention, it is provided that the bearing element is arranged on a pivot axis carrier of the lower roller carrier. This preferred embodiment of the invention offers the possibility of removing the bearing element from the lower roller carrier if necessary and replacing it with a new bearing element, for example to enable the use of alternative air spinnerets on the drafting unit. According to a particularly preferred embodiment of the invention, it is provided that the bearing element is formed by a bearing bolt which is held in a stationary manner by the pivot axis support and is more preferably pressed or screwed into the pivot axis support.
  • the bearing pin can also be attached to the lower roller carrier or the pivot axis carrier via other types of fastening, such as a clamping or latching device, a bayonet lock or similar.
  • fastening it is essential to select the one that allows the bearing pin to be held in a stationary manner on the lower roller carrier or the pivot axis carrier.
  • the bearing element is arranged in such a way that the air spinneret can be pivoted between the operating position and at least the second position along a direction of movement that runs transversely to the axis of rotation of the output roller, and more preferably runs orthogonally. Further preferably, the bearing element is arranged such that the air spinneret can be pivoted tangentially to the output lower roller between the operating position and the second position.
  • the pivot axis runs parallel to the clamping line of the pair of output rollers and the pivot axis, the axis of rotation of the output lower roller and the axis of rotation of the output top roller lie in a common plane, i.e. i.e., span a common level.
  • the spinneret can be moved from the operating position at least into the second position, which can constitute the maintenance position and / or an end position for the pivotable air spinneret that is different from the operating position, in a direction of movement that causes the dissolution made easier by thickening in the yarn.
  • the further preferred embodiment of the tangential pivoting of the air spinneret to the output roller contributes to the further improved resolution of thickenings in the yarn.
  • a guide element arranged on the lower roller carrier is provided with a guide surface which extends parallel beyond the free end and at a distance from the bearing element.
  • the guide element serves as a stop element, which makes it easier for the machine operator to arrange the air spinneret on the bearing element.
  • the air spinneret is placed on the guide surface adjacent to the free end of the bearing element by the machine operator. When in contact with the guide surface, the air spinneret can then be displaced by a movement aligned parallel to the guide surface in the direction of the end of the bearing element opposite the free end of the bearing element. The spinneret can therefore be easily pushed onto the bearing element.
  • the guide surface serves as an assembly aid, which enables particularly simple and quick assembly of the air spinneret on the lower roller support.
  • the invention further solves the problem by means of an air-jet spinning machine for producing a thread or roving from a supplied sliver, which has at least one drafting unit according to the invention or preferably further developed as described above.
  • the air-jet spinning machine according to the invention has the advantage that, if necessary, the air-jet spinning nozzle can be removed from the spinning position in a particularly simple and convenient manner. Maintenance and cleaning work can therefore be carried out conveniently in a short amount of time, meaning that there is only minimal downtime in the event of maintenance work.
  • FIG. 1 A perspective detail of a drafting unit 1 shown in a schematic representation shows the connection area of an air spinneret 2 in the area of an output lower roller 3 on a lower roller carrier 4 according to an exemplary embodiment.
  • the air spinneret is separated from the lower roller carrier 4.
  • the air spinneret 2 has a carrier 13 for arrangement on the lower roller carrier 4 with a bearing element receptacle 14 extending through the carrier 13.
  • the bearing element holder 14 is placed on a bearing element 5 designed as a bearing pin in the direction of a bearing element carrier 10 carrying the bearing pin up to the in Figure 2 pushed position shown pushed onto the bearing pin 5.
  • a guide element 11 is arranged on the lower roller carrier 4, the guide surface 12 of which extends parallel to the bearing pin beyond its free end 6.
  • the air spinneret 2 can move around the bearing pin or around the pivot axis formed by the bearing pin into the in Figure 3 shown operating position and pivoted back again, with the air spinneret 2 in the operating position in the sliver transport direction being arranged downstream of a clamping line formed by the output lower roller 3 and the output upper roller (not shown here) for receiving the supplied sliver.
  • Figure 5 shows a further exemplary embodiment, in which, in contrast to the previous exemplary embodiment, the pushing direction of the air spinneret 2 is reversed.
  • the stop element 7 of the bearing pin is arranged along the push-on direction at the right end of the bearing pin, so that the air spinneret 2 can be pushed from the left over the free end 6 of the bearing pin located on the left.
  • the guide element 11 is arranged at a corresponding position on the lower roller carrier 4.
  • the carrier 13 of the air spinneret 2 points pushed-on state of the air spinneret 2 on the side facing the free end 6 of the bearing pin an end section 15 pushed onto the bearing pin, which has a bore for receiving a pressure piece 16, in particular a spring-loaded pressure piece.
  • the pressure piece 16 is screwed into the bore 15 and engages with its tip in a recess, not shown, which is congruent on the bearing pin with the tip of the pressure piece 16, the recess being designed as a circumferential groove 8 on the bearing pin according to an exemplary embodiment .
  • This allows the air spinneret 2 to be securely fixed on the bearing pin.
  • the pressure piece 16 must be loosened in a defined manner in the unscrewing direction, whereby the air spinneret 2 becomes freely movable along the push-on direction.
  • the use of such a pressure piece 16, in particular a spring-loaded pressure piece simplifies the assembly and disassembly of the air spinneret 2 on or from the bearing pin.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP23192964.7A 2022-08-25 2023-08-23 Luftspinnmaschine sowie streckwerkeinheit für eine spinnstelle einer luftspinnmaschine Pending EP4339341A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU502705A LU502705B1 (de) 2022-08-25 2022-08-25 Luftspinnmaschine sowie Streckwerkeinheit für eine Spinnstelle einer Luftspinnmaschine

Publications (1)

Publication Number Publication Date
EP4339341A1 true EP4339341A1 (de) 2024-03-20

Family

ID=84363683

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23192964.7A Pending EP4339341A1 (de) 2022-08-25 2023-08-23 Luftspinnmaschine sowie streckwerkeinheit für eine spinnstelle einer luftspinnmaschine

Country Status (7)

Country Link
US (1) US20240068133A1 (ja)
EP (1) EP4339341A1 (ja)
JP (1) JP2024031852A (ja)
CN (1) CN117626485A (ja)
BR (1) BR102023016392A2 (ja)
LU (1) LU502705B1 (ja)
MX (1) MX2023009325A (ja)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1431433A1 (de) * 2002-12-20 2004-06-23 Maschinenfabrik Rieter Ag Streckwerk-Konstruktion
JP2009068126A (ja) * 2007-09-11 2009-04-02 Murata Mach Ltd ドラフトローラのクリーニング装置、ドラフト装置、及び繊維機械
EP2752513A1 (en) * 2011-08-31 2014-07-09 Murata Machinery, Ltd. Spinning machine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1395284A (en) * 1921-04-29 1921-11-01 Leonard Don Carlos Front-roll stand for spinning-frames
DE4205854A1 (de) * 1992-02-26 1993-09-02 Stahlecker Fritz Textilmaschine mit einer vielzahl von in reihe nebeneinander angeordneten streckwerken
DE102005027193A1 (de) * 2005-06-06 2006-12-07 Wilhelm Stahlecker Gmbh Zwillingseinheit mit zwei Streckwerken für eine Spinnmaschine
DE102007039522B4 (de) * 2007-08-21 2019-10-02 Trützschler GmbH & Co Kommanditgesellschaft Vorrichtung an einem Streckwerk einer Strecke für Textilfaserbänder
CH702653A2 (de) * 2010-02-12 2011-08-15 Rieter Ag Maschf Streckwerkseinheit für eine Spinnmaschine.
EP3835467A1 (de) * 2019-12-09 2021-06-16 Saurer Intelligent Technology AG Verfahren zur reinigung einer luftspinnvorrichtung einer spinnstelle, eine solche luftspinnvorrichtung und eine fadenbildungseinheit für eine solche luftspinnvorrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1431433A1 (de) * 2002-12-20 2004-06-23 Maschinenfabrik Rieter Ag Streckwerk-Konstruktion
JP2009068126A (ja) * 2007-09-11 2009-04-02 Murata Mach Ltd ドラフトローラのクリーニング装置、ドラフト装置、及び繊維機械
EP2752513A1 (en) * 2011-08-31 2014-07-09 Murata Machinery, Ltd. Spinning machine

Also Published As

Publication number Publication date
JP2024031852A (ja) 2024-03-07
CN117626485A (zh) 2024-03-01
US20240068133A1 (en) 2024-02-29
LU502705B1 (de) 2024-02-26
MX2023009325A (es) 2024-02-26
BR102023016392A2 (pt) 2024-03-05

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