EP3771756B1 - Métier à filer doté d'une pluralité de postes de travail disposés l'un à côté de l'autre et d'un dispositif de maintenance mobile doté d'un élément de travail pneumatique ainsi que procédé d'alimentation de l'élément de travail pneumatique en dépression - Google Patents

Métier à filer doté d'une pluralité de postes de travail disposés l'un à côté de l'autre et d'un dispositif de maintenance mobile doté d'un élément de travail pneumatique ainsi que procédé d'alimentation de l'élément de travail pneumatique en dépression Download PDF

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Publication number
EP3771756B1
EP3771756B1 EP20188391.5A EP20188391A EP3771756B1 EP 3771756 B1 EP3771756 B1 EP 3771756B1 EP 20188391 A EP20188391 A EP 20188391A EP 3771756 B1 EP3771756 B1 EP 3771756B1
Authority
EP
European Patent Office
Prior art keywords
spinning
opening
vacuum
suction
sliver
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.)
Active
Application number
EP20188391.5A
Other languages
German (de)
English (en)
Other versions
EP3771756A1 (fr
Inventor
Romeo Pohn
Harald Widner
Sebastian Fritz
Simon Schönberger
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
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Publication date
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP3771756A1 publication Critical patent/EP3771756A1/fr
Application granted granted Critical
Publication of EP3771756B1 publication Critical patent/EP3771756B1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/005—Service carriages travelling along the machines
    • 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
    • D01H4/04—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 contact of fibres with a running surface
    • D01H4/22—Cleaning of running surfaces
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H11/00—Arrangements for confining or removing dust, fly or the like
    • D01H11/005—Arrangements for confining or removing dust, fly or the like with blowing and/or suction devices
    • 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
    • D01H4/04—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 contact of fibres with a running surface
    • D01H4/22—Cleaning of running surfaces
    • D01H4/24—Cleaning of running surfaces in rotor spinning
    • 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
    • D01H4/04—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 contact of fibres with a running surface
    • D01H4/22—Cleaning of running surfaces
    • D01H4/26—Cleaning of running surfaces in friction spinning
    • 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
    • D01H5/60—Arrangements maintaining drafting elements free of fibre accumulations
    • D01H5/66—Suction devices exclusively
    • D01H5/68—Suction end-catchers
    • 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
    • D01H4/36—Arrangements for separating slivers into fibres; Orienting or straightening fibres, e.g. using guide-rolls with means for taking away impurities

Definitions

  • the present invention relates to a spinning machine, in particular an open-end spinning machine, with a plurality of work stations arranged next to one another, each of which has a spinning device that can be acted upon by a process vacuum, with at least one vacuum channel extending along the work stations for supplying the spinning devices with the process vacuum and with at least one Maintenance device which can be moved along the work stations and has at least one pneumatic working element and at least one vacuum line for supplying the pneumatic working element with negative pressure.
  • Open-end spinning machines with movable maintenance devices are known from the prior art.
  • the maintenance devices have several working units which can carry out various maintenance work on the individual spinning positions such as bobbin change, rotor cleaning, piecing after a thread break or after a bobbin change and the like.
  • the maintenance devices or their work organs must therefore be supplied with electrical energy, with negative pressure and / or with compressed air, depending on the design of their work organs.
  • Various systems have become known for supplying the working organs of the maintenance facilities with negative pressure.
  • a vacuum source for the maintenance device in the form of a vacuum pump directly on the movable maintenance device.
  • the vacuum pump has a correspondingly high space requirement and a correspondingly high weight, which must always be carried with the maintenance device. If many working elements of the maintenance device have to be supplied with negative pressure, then the performance of such a vacuum pump that can be moved with the maintenance device may possibly not be sufficient.
  • Spinning machines have therefore become established which, in addition to their regular negative pressure system, which makes the process negative pressure available, have a further negative pressure system which supplies negative pressure to the maintenance device.
  • a spinning machine is in the DE 10 2004 038 697 A1 shown.
  • the spinning machine has a first fan which applies negative pressure to a first negative pressure channel, via which the work stations of the spinning machine are supplied with negative process pressure.
  • a second vacuum channel runs above the spinning machine and is acted upon by a second fan, via which the maintenance device is supplied with vacuum.
  • the vacuum supply to the machine is correspondingly complex.
  • the U.S. 4,485,616 A discloses an open-end spinning machine with a plurality of work stations arranged next to one another and with a maintenance device which can be moved along the work stations and which is supplied with underpressure by a vacuum line extending along the machine.
  • the object of the present invention is therefore to ensure the vacuum supply to the maintenance device in a simple manner.
  • a spinning machine in particular an open-end spinning machine, with a plurality of work stations arranged next to one another, each of which has a spinning device that can be acted upon by a process vacuum, has at least one vacuum channel extending along the work stations for supplying the spinning devices with the process underpressure.
  • the work stations can also have a suction nozzle that can be subjected to a process vacuum.
  • suction nozzle is assigned to a drafting system at each work station.
  • suction nozzles are often provided at the workplaces in order to find a new thread end to be spun from a pay-off bobbin.
  • the spinning machine has at least one maintenance device which can be moved along the work stations and which has at least one pneumatic working element and at least one vacuum line for supplying the pneumatic working element with negative pressure. It is proposed that the spinning devices each have a closable connection opening which is connected to the process negative pressure. As an alternative or in addition, the suction nozzles can each have such a closable connection opening. Furthermore, the maintenance device has a suction head that can be advanced to the connection opening of the spinning devices and / or the suction nozzles and is connected to the vacuum line. Closing the The connection opening can be made through a cover element or just through a valve.
  • the spinning machine has a plurality of workplaces arranged next to one another, each of which has a spinning device that can be subjected to a negative process pressure and / or a suction nozzle that can be subjected to a negative process pressure.
  • the maintenance device can be moved along the work stations.
  • the working element is supplied with process negative pressure by a suction head of the maintenance device, the suction head being fed to a closable connection opening of the spinning device and / or the suction nozzle.
  • connection openings are required on the individual spinning devices or suction nozzles, which can be introduced into a housing of the spinning device in a structurally simple manner. It is also possible to use existing openings as connection openings.
  • the supply of the maintenance device with the process negative pressure via a connection opening arranged at the work station is particularly advantageous in the case of spinning machines with self-sufficient work stations. These machines only need negative pressure for a few maintenance activities. The negative pressure can therefore be taken directly from the spinning device without any problems and in sufficient quantities, without impairing the negative pressure system of the machine.
  • the spinning device is designed as a rotor spinning device with a rotor housing.
  • This type of vacuum supply can be used particularly advantageously on a rotor spinning machine.
  • the spinning device is designed as an air spinning device with a spinning chamber that can be acted upon by the negative process pressure.
  • the maintenance device can be supplied with negative pressure both via a connection opening of the spinning device near the spinning chamber or via a connection opening of a suction nozzle.
  • connection opening is an opening in the rotor housing that can be closed by a cover element.
  • the working element is accordingly advantageously supplied with process negative pressure via an opening in the rotor housing.
  • the rotor housing has an opening which can be closed by a cover element and which enables the spinning rotor to be cleaned, the spinning rotor to be replaced and the rotor housing itself to be cleaned. In the spinning operation, this opening is closed by the cover element. No additional components are therefore required to supply the maintenance device with the negative pressure, so that this can be carried out in a particularly simple and cost-effective manner.
  • the suction head can be moved from a rest position into a working position for delivery to the connection opening.
  • the maintenance device can easily drive along the workplaces without the risk of collisions with the suction head.
  • connection opening in particular the opening of the rotor housing, in the working position.
  • the connection opening can hereby be sealed to the outside in a particularly simple manner, so that negative pressure losses are avoided.
  • connection opening in particular the opening of the rotor housing
  • suction head cooperates with a sealing element of the spinning device.
  • connection opening is the opening of the rotor housing, since it is usually provided with a sealing element anyway, which interacts with the cover element of the rotor housing when the work station is in operation.
  • connection opening is sealed from the outside by a sealing element, in particular by a sealing element of the connection opening.
  • the suction head has a sealing element which seals the connection opening to the outside or, in the process, the connection opening is sealed by a sealing element of the suction head while the working organ is being supplied with the process negative pressure.
  • the sealing element of the spinning device is not arranged on the rotor housing, but on the cover element. In this case it is useful to equip the suction head with a sealing element.
  • the suction head has a centering element by means of which the suction head can be centered with respect to the connection opening. This makes it easier to connect the suction head to the connection opening and to seal off from the outside.
  • the centering element can be designed in a simple manner, for example, as a centering cone which can be introduced into a cylindrical connection opening.
  • the suction head has a cover element which, in the working position of the suction head, covers a spinning rotor arranged in the rotor housing. This protects the spinning rotor from damage caused by the suction head as well as from soiling and flying fibers, which can occur during individual maintenance activities. It is also advantageous in the method if the spinning rotor is covered by a cover element of the suction head while the working element is being supplied with the process negative pressure.
  • the pneumatic working element is a sliver laying device or at least a component, in particular a suction pipe, of a sliver laying device.
  • Sliver laying devices are known in the prior art for picking up a sliver end from a can after a break or a change in the fiber material fed to the spinning device and feeding it back to the feed device or the drafting system of the spinning device.
  • the cover element has a passage opening which, in the working position of the suction head, connects the vacuum line of the maintenance device to a suction opening in the rotor housing.
  • This makes it possible to use the vacuum flow to convey materials through the suction head.
  • a severed piece of sliver can easily be passed via the vacuum line and through the passage opening of the suction head into the connection opening and disposed of via the vacuum channel.
  • the connection opening is the opening of the rotor housing, then the severed piece of sliver can be sucked past the rotor into the vacuum channel without getting tangled on the rotor or contaminating it.
  • the cover element completely covers the spinning rotor.
  • the cover element preferably fills the rotor housing almost completely and only leaves the passage opening free.
  • the received sliver end is cut to length before being fed to the spinning device, in particular to a feed device or a drafting device of the spinning device, a severed piece of sliver being produced.
  • the severed piece of sliver is sucked off through the opening in the rotor housing and a suction opening in the rotor housing and disposed of.
  • the suction opening of the rotor housing is present anyway in order to apply negative pressure to the rotor housing and is usually also provided with a valve anyway so that the negative pressure supply can also be switched off.
  • the severed sliver piece can be deposited in a collecting container by means of the pneumatic working element or possibly also by means of a further handling element which does not necessarily have to be pneumatic.
  • the collecting container Preferably, several separated pieces of sliver are first collected in the collecting container.
  • the severed sliver piece (s) can be deposited at the end of the machine, for example in an empty can, or transferred to a transport vehicle. It is in turn possible to transport a severed piece of sliver directly to the end of the machine. However, it is also possible to collect several pieces of sliver in the collecting container and collect them from time to time to be transported to the end of the machine. The transport to the end of the machine can take place, for example, by means of a dirt transport belt that is already present.
  • the severed piece of sliver is fed to a dirt conveyor belt in order to dispose of it.
  • the piece of sliver can be placed on the dirt conveyor belt directly after it has been severed by the pneumatic working element or, if necessary, also by another handling element. It is also conceivable, however, to feed several pieces of fiber sliver collected in the above-described collecting container together to the dirt conveyor belt from time to time.
  • FIG. 1 shows a front view of a spinning machine 1 in a schematic representation.
  • the spinning machine 1 has a plurality of work stations 2 arranged next to one another, at which a fiber sliver 25 is spun into a yarn 26 in a manner known per se.
  • each of the work stations 2 has a feed device 5 to which the sliver 25 is fed from a can 24.
  • the sliver 25 can be guided through a loop catcher 28 arranged at the work station 2.
  • the feed device 5 contains a driven feed roller 6 and a feed trough 7, which feed the sliver 25 to an opening roller 4.
  • the fiber material dissolved into individual fibers becomes one Spinning device 3 supplied, where it is spun into yarn 26.
  • the yarn 26 is withdrawn from the spinning device 3 by means of a withdrawal device 29 and fed to a winding device 10, where it is wound onto a bobbin 11.
  • the spinning device 3 For spinning the sliver 25, the spinning device 3 requires a process vacuum PU which is supplied to the individual work stations 2 via a vacuum channel 8 extending along the work stations 2. Each of the spinning devices 3 is acted upon by the process negative pressure PU through a branch line 9 branching off from the negative pressure channel 8.
  • the spinning machine 1 shown here is designed as an open-end spinning machine, here as a rotor spinning machine.
  • the invention can also be used in other spinning machines 1 which require a process negative pressure PU for the spinning process.
  • friction spinning machines and air jet spinning machines are conceivable.
  • An air-jet spinning machine is in Figure 7 shown.
  • the spinning machine 1 also has a maintenance device 12 which can be moved along the work stations 2 and which has at least one pneumatic working element 13 and at least one vacuum line 14 for supplying the pneumatic working element 13 with negative pressure.
  • the pneumatic working element 13 can, for example, be a suction tube for picking up a thread end or a sliver end 27 (see FIG Figure 5 ) or a pneumatic thread store.
  • connection opening 15 of the spinning device 3 is fed with a suction head 16 of the maintenance device 12, through which the pneumatic working element 13 is supplied with process negative pressure PU.
  • connection openings 15 are connected to the process negative pressure PU via a further branch line 9, for example.
  • the suction head 16 of the maintenance device 12 is connected to the vacuum line 14 and can be delivered to the connection openings 15.
  • connection openings 15 are designed as independent openings of the spinning device 3, ie they are provided explicitly and exclusively for supplying the maintenance device 12 with negative pressure on the spinning devices 3.
  • openings which are already present in connection with the process negative pressure PU can also be used to supply the maintenance device 12, as is shown on the basis of FIG Figures 2-4 and 6th executed.
  • an independent connection opening 15 could also be provided on the spinning device 3 near the spinning chamber.
  • FIG. 2 shows a schematic front view of a spinning device 3, which is designed as a rotor spinning device.
  • the spinning device 3 has a rotor housing 17 in which a spinning rotor 31 is received.
  • the rotor housing 17 also has an opening 18 which is closed by a cover element 30 during the spinning operation.
  • the cover element 30 can be pivoted about a pivot axis 34 in order to open and close the opening 18 of the rotor housing 17.
  • the cover element 30 is shown in a closed state in which it closes the opening 18 of the rotor housing 17 in dash-dotted lines. In contrast, the cover element 30 is shown in its folded-down state from the rotor housing 17 in solid lines.
  • the rotor housing 17 also has a suction opening 32 which connects it to the vacuum channel 8 via the branch line 9.
  • the suction opening 32 can be closed by means of a valve 33. This allows the spinning device 3 of the Process vacuum PU are separated when the spinning device 3 is not in operation. In the present case, the valve 33 is shown in the closed state.
  • connection opening 15 is formed directly through the opening 18 of the rotor housing 17.
  • This embodiment has the advantage that no changes to the work stations 2 are required to supply the pneumatic working element 13 of the maintenance device 12, since the opening 18 of the rotor housing 17 is present anyway and can be used without changes to supply the maintenance device 12 with negative pressure.
  • the suction head 16 (see Figure 3 ) is designed in this case for connection to the opening 18 of the rotor housing 17 and adapted to its size.
  • FIG 3 now shows a spinning device 3, in which the opening 18 of the rotor housing 17 the suction head 16 of the maintenance device 12 has already been delivered.
  • the cover element 30 was swiveled away for this purpose, which can be done either by the maintenance device 12 or by the work station 2 or spinning device 3 itself.
  • the suction head 16 completely covers the opening 18 of the rotor housing 17 or the connection opening 15, so that a loss of negative pressure or the suction of false air from the environment is avoided.
  • the valve 33 is now open in order to enable the vacuum supply to the maintenance device 12 via the suction head 16 and the vacuum line 14 via the suction opening 32 of the rotor housing 17.
  • Figure 4 shows a schematic, partially sectioned side view of a work station 2 of a spinning machine 1.
  • a maintenance device 12 is positioned in front of the work station 2 in order to carry out a maintenance activity at the work station 2.
  • the individual components and parts of the work station 2 and the maintenance facility 12 largely correspond to those of Figure 1 and are no longer explained here.
  • the maintenance device 12 has a pneumatic working element 13, which is supplied with process negative pressure PU via the negative pressure line 14 and the opening 18 of the rotor housing 17.
  • the cover element 30 has already been swiveled away and the suction head 16 of the maintenance device 12 has already been fed to the opening 18 of the rotor housing 17.
  • the suction head 16 can be moved from a rest position I, in which it is protected inside the maintenance device 12, into a working position II, in which it is advanced to the opening 18 of the rotor housing 17.
  • the movement can take place in any desired manner by a linear movement, a pivoting movement or a combined movement, which can be achieved in an advantageous manner by means of pneumatic cylinders (not shown here).
  • the pneumatic working element 13 can again be supplied with the process negative pressure PU.
  • connection opening 15 is sealed by means of a sealing element 19.
  • the sealing takes place by the sealing element 19, which is already arranged at the opening 18 of the rotor housing 17 and which, when the spinning device 3 is in operation, seals the rotor housing 17 in cooperation with the cover element 30.
  • the suction head 16 interacts with the sealing element 19 of the spinning device 3 in order to seal the rotor housing 17.
  • the suction head 16 is placed on the sealing element 19, for example, by means of the pneumatic cylinder or cylinders or other actuating units, and is pressed against it.
  • the suction head 16 In order to correctly position the suction head 16 to the connection opening 15, which for the sake of clarity in FIG Figure 4 is not marked to position, the suction head 16 according to the present example also has a centering element 20.
  • the centering element 20 is designed as a centering cone and engages in the opening 18 of the rotor housing 17 or the connection opening 15 for centering.
  • the suction head 16 shown here also has a cover element 21.
  • this is embodied separately from the centering element 20 and serves to protect the spinning rotor 31 from damage by the suction head 16 and also from contamination from materials that may have been sucked off.
  • the cover element 21 completely covers the spinning rotor 31 and only leaves a narrow passage opening 22 open in an edge region of the rotor housing 17. This enables materials passed through the vacuum line 14 to be discharged via the suction opening 32 and the branch line 9 into the vacuum channel 8.
  • the passage opening 22 is formed in the present case by a recess in the cover element 21.
  • FIG. 5 shows such a suction head 16 with a passage opening 22 in a schematic, sectioned detailed illustration.
  • the spinning rotor 31 is for the sake of clarity in the Figure 5 not shown.
  • the passage opening 22 is designed here in the form of a passage channel within the cover element 21.
  • the embodiments shown of the suction head 16 are only to be understood as examples.
  • the vacuum line 14 does not necessarily have to be connected centrally to the suction head 16.
  • the centering element 20 and the cover element 21 can also be formed completely in one piece with one another. Even a cover element 21 is also not absolutely necessary, depending on which function the pneumatic working element 13 exerts and where exactly the connection opening 15 is arranged.
  • FIG. 6 shows a front view of a maintenance device 12 with a pneumatic working element 13, which is designed as a sliver application device 23.
  • the pneumatic working element 13 is in this case a suction pipe which is movably arranged on the maintenance device 12, as indicated by the double arrow. If the sliver 25 tears on a spinning device 3 or if the sliver 25 stored in the can 24 assigned to the respective work station 2 has run out, it is necessary to pick up a new fiber sliver end 27 from the can 24 and transfer it to the spinning device 3 or the feed device 5 again to feed.
  • the maintenance device 12 is positioned in front of the relevant work station 2, in the present case the middle of the three work stations 2 shown. Then the cover element 30 is opened, which can be done either by the maintenance device 12 or by the work station 2 itself. The cover element 30 is not shown here for reasons of clarity.
  • the suction head 16 is moved from its rest position I into the working position II in order to dock the suction head 16 to the connection opening 15, which is also formed here by the opening 18 of the rotor housing 17. Since the work station 2 is shut down when the fiber sliver 25 is broken or run out, the valve 33 is in the suction opening 32 (see FIG Figures 2 and 3 ) closed at this time.
  • the valve 33 can now be opened in order to make the process negative pressure PU available to the pneumatic working element 13.
  • the suction pipe or the pneumatic Working member 13 is pivoted back and forth until the sliver end 27 is found through the suction tube and sucked in.
  • the sliver end 27 is usually placed over the edge of the can 24. If the sliver 25 is torn, a sliver end 27, which lies inside the can 24, has to be placed over the edge of the can 24 again by an operator.
  • the fiber sliver end 27 After the fiber sliver end 27 has been picked up by the working element 13, it is pivoted again, as indicated by the dash-dotted line, and thereby fed to the feed device 5. If a loop catcher 28 is arranged at the work station 2, the sliver end 27 can also be inserted directly into the loop catcher 28 by the pneumatic working element 13.
  • the sliver application device 23 can also have a plurality of pneumatic working elements 13 or also other, non-pneumatic handling devices.
  • a plurality of pneumatic working elements 13 or also other, non-pneumatic handling devices For example, for threading the sliver 25 or the sliver end 27 into the loop catcher 28, one or more additional working elements 13 or handling devices can also be present.
  • the received fiber sliver end 27 is first cut to a defined length and thinned before it is fed to the feed device 5.
  • the cutting to length and fading out like the feeding to the feed device 5, can be carried out both by the pneumatic working element 13, here the suction pipe, and by a further pneumatic working element 13 or a further handling device.
  • the valve 33 is closed again and the suction head 16 is brought back into its rest position I.
  • the cover element 30 of the spinning device 3 is closed and the maintenance device 12 leaves the work station 2.
  • the work station 2 in question can now resume its regular production.
  • FIG. 7 shows a schematic side view of a work station 2 of a spinning machine designed as an air jet spinning machine 1.
  • the spinning device 3 of each work station 2 has a spinning chamber 35 in which the fed sliver 25 is spun into a yarn by means of compressed air.
  • the spinning chamber 35 is also provided with a vacuum connection 36, via which it can be subjected to a process vacuum PU.
  • a drafting device 37 is provided in this case at each of the work stations 2, in which a sliver 25 is already drawn.
  • a suction nozzle 38 is preferably assigned to the drafting system 37 at each work station 2, by means of which loose fibers are suctioned off.
  • the suction nozzle 38 is then also connected to the process negative pressure PU via a negative pressure connection 36.
  • a vacuum channel 8 extending along the work stations 2 is also provided in the air-jet spinning machine.
  • Each of the spinning devices 3 or the spinning chambers 35 and / or also each of the suction nozzles 38 is acted upon by a branch line 9 branching off from the negative pressure channel 8 with the process negative pressure PU.
  • the suction nozzle 38 is arranged at the work station 2 so that it can be folded down.
  • the suction nozzle 38 is shown in solid lines in its position during the spinning operation, while the folded position is shown in dash-dotted lines. If the suction nozzle 38 is folded down, so the vacuum connection 36, which in the present case is also provided with a sealing element 19, is free and can be used as a connection opening 15 for the maintenance device 12.

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

Claims (15)

  1. Machine à filer, en particulier machine à filer à bout libéré (1), avec une pluralité de postes de travail (2) disposés les uns à côté des autres, qui comportent chacun un dispositif de filage (3) pouvant être soumis à une dépression de processus (PU) et/ou une buse d'aspiration pouvant être soumise à une dépression de processus (PU), avec au moins un canal de dépression (8) s'étendant le long des postes de travail (2) pour alimenter les dispositifs de filage (3) et/ou les buses d'aspiration en dépression de processus (PU) et avec au moins un dispositif de maintenance (12) pouvant être déplacé le long des postes de travail (2), qui présente au moins un organe de travail pneumatique (13) ainsi qu'au moins une conduite de dépression (14) pour l'alimentation en dépression de l'organe de travail pneumatique (13), caractérisée en ce que les dispositifs de filage (3) et/ou les buses d'aspiration présentent chacun un orifice de raccordement (15) pouvant être fermé, qui est en relation avec la dépression de processus (PU), et en ce que le dispositif de maintenance (12) présente une tête d'aspiration (16) qui peut être amenée à l'orifice de raccordement (15) des dispositifs de filage (3) et/ou des buses d'aspiration et qui est reliée à la conduite de dépression (14).
  2. Machine à filer (1) selon la revendication précédente, caractérisée en ce que le dispositif de filage (3) se présente sous la forme d'un dispositif de filage pneumatique avec une chambre de filage pouvant être soumise à la dépression de processus (PU).
  3. Machine à filer (1) selon la revendication 1, caractérisée en ce que le dispositif de filage (3) se présente sous la forme d'un dispositif de filature à rotor avec un carter de rotor (17), dans laquelle l'orifice de raccordement (15) est une ouverture du carter de rotor (17) qui peut être fermée par un élément de recouvrement (30).
  4. Machine à filer (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que la tête d'aspiration (16) est déplaçable d'une position de repos (I) à une position de travail (II) pour être mise en place à l'orifice de raccordement (15).
  5. Machine à filer (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que la tête d'aspiration (16), dans la position de travail (II), recouvre complètement l'orifice de raccordement (15), en particulier l'ouverture (18) du carter de rotor (17).
  6. Machine à filer (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que la tête d'aspiration (16), dans la position de travail (II), coopère avec un élément d'étanchéité (19) du dispositif de filage et/ou de la buse d'aspiration pour étancher vers l'extérieur l'orifice de raccordement (15), en particulier l'ouverture du carter de rotor (17).
  7. Machine à filer (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que la tête d'aspiration (16) présente un élément de centrage (20) au moyen duquel la tête d'aspiration (16) peut être centrée par rapport à l'orifice de raccordement (15).
  8. Machine à filer (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'organe de travail pneumatique (13) est un dispositif d'application (23) de ruban de fibres ou un composant, en particulier un tube d'aspiration, d'un dispositif d'application (23) de ruban de fibres.
  9. Machine à filer (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de recouvrement (21) présente une ouverture de passage (22) qui, dans la position de travail (II) de la tête d'aspiration (16), relie la conduite de dépression (14) du dispositif de maintenance (12) à une ouverture d'aspiration (32) du carter de rotor (17).
  10. Procédé pour alimenter en dépression un organe de travail pneumatique (13) d'un dispositif de maintenance (12) d'une machine à filer, en particulier d'une machine à filer à bout libéré (1), dans lequel la machine à filer (1) présente une pluralité de postes de travail (2) disposés les uns à côté des autres, qui comportent chacun un dispositif de filage (3) pouvant être soumis à une dépression de processus (PU) et/ou une buse d'aspiration pouvant être soumise à une dépression de processus (PU), et dans lequel le dispositif de maintenance (12) peut être déplacé le long des postes de travail (2), caractérisé en ce que l'organe de travail pneumatique (13) est alimenté en dépression de processus (PU) par une tête d'aspiration (16) du dispositif de maintenance (12), dans lequel la tête d'aspiration (16) est amené à un orifice de raccordement (15) obturable du dispositif de filage (3) et/ou de la buse d'aspiration.
  11. Procédé selon la revendication précédente, caractérisé en ce que le dispositif de filage (3) se présente sous la forme d'un dispositif de filature à rotor avec un carter de rotor (17) et l'organe de travail pneumatique (13) est alimenté en dépression de processus (PU) via une ouverture du carter de rotor (17).
  12. Procédé selon l'une quelconque des revendications de procédé précédentes, caractérisé en ce qu'une extrémité (27) de ruban de fibres est saisie au moyen de l'organe de travail pneumatique (13) et délivrée à un dispositif d'alimentation ou à un dispositif d'étirage du dispositif de filage (3).
  13. Procédé selon l'une quelconque des revendications de procédé précédentes, caractérisé en ce que l'extrémité (27) de ruban de fibres saisie est coupée à longueur avant d'être délivrée au dispositif de filage (3) ou au dispositif d'étirage, sachant qu'il en résulte un morceau de ruban de fibres séparé.
  14. Procédé selon l'une quelconque des revendications de procédé précédentes, caractérisé en ce que le morceau de ruban de fibres séparé est aspiré par la tête d'aspiration (16) et l'orifice de raccordement (15) et amené à l'élimination ou en ce que le morceau de ruban de fibres séparé est aspiré par l'ouverture (18) du carter de rotor (17) et une ouverture d'aspiration (32) du carter de rotor (17) et amené à l'élimination.
  15. Procédé selon l'une quelconque des revendications de procédé précédentes, caractérisé en ce que le morceau de ruban de fibres séparé est déposé dans un récipient collecteur au moyen de l'organe de travail pneumatique (13), sachant que le morceau de ruban de fibres séparé est de préférence transféré du récipient collecteur à un pot vide (24) ou à un véhicule de transport.
EP20188391.5A 2019-08-02 2020-07-29 Métier à filer doté d'une pluralité de postes de travail disposés l'un à côté de l'autre et d'un dispositif de maintenance mobile doté d'un élément de travail pneumatique ainsi que procédé d'alimentation de l'élément de travail pneumatique en dépression Active EP3771756B1 (fr)

Applications Claiming Priority (1)

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DE102019120980.3A DE102019120980A1 (de) 2019-08-02 2019-08-02 Spinnmaschine mit einer Vielzahl nebeneinander angeordneter Arbeitsstellen und einer verfahrbaren Wartungseinrichtung mit einem pneumatischen Arbeitsorgan sowie Verfahren zum Versorgen des pneumatischen Arbeitsorgans mit Unterdruck

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EP3771756B1 true EP3771756B1 (fr) 2021-12-01

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US (1) US11530496B2 (fr)
EP (1) EP3771756B1 (fr)
CN (1) CN112301475A (fr)
DE (1) DE102019120980A1 (fr)

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DE102020131089A1 (de) * 2020-11-24 2022-05-25 Maschinenfabrik Rieter Ag Verfahren zur Durchführung eines automatischen Kannenwechselvorgangs an einer Spinnstelle einer Spinnmaschine sowie Spinnmaschine und verfahrbarer Kannenwechsler
DE102020131090A1 (de) * 2020-11-24 2022-05-25 Maschinenfabrik Rieter Ag Verfahren zur Durchführung eines automatischen Kannenwechselvorgangs an einer Spinnstelle einer Spinnmaschine sowie Spinnmaschine und verfahrbarer Kannenwechsler
CN113463230A (zh) * 2021-08-04 2021-10-01 南通双弘纺织有限公司 分段式粗纱清洁系统及其清洁方法

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US20210032781A1 (en) 2021-02-04
DE102019120980A1 (de) 2021-02-04
EP3771756A1 (fr) 2021-02-03
US11530496B2 (en) 2022-12-20
CN112301475A (zh) 2021-02-02

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