Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
  • D01H1/08—Spinning or twisting machines in which the product is wound-up continuously cup, pot or disc type, in which annular masses of yarn are formed by centrifugal action
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
  • D01H9/02—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing completed take-up packages and replacing by bobbins, cores, or receptacles at take-up stations; Transferring material between adjacent full and empty take-up elements
  • D01H9/04—Doffing arrangements integral with spinning or twisting machines
  • D01H9/06—Removing yarn from centrifugal cups on to yarn carriers

Definitions

• the invention relates to a method for operating a spinning device according to the preamble of claim 1.
• a stock material for example a sliver stored in a spinning can or a sliver arranged on a flyer spool, is first drawn to a desired yarn count by means of a drafting device and then conveyed via an axially displaceably mounted thread guide tube into a spinning centrifuge rotating at high speed.
• the warped template material emerging from the mouth of the thread guide tube lies against the inner wall of the spinning centrifuge, forming a thread leg, and is carried along by it.
• the fiber material is rotated by the rotation of the spinning centrifuge, so that a thread is formed.
• the thread created by the rotation is deposited during the spinning process through the axially displaceably mounted thread guide tube on the inner wall of the centrifuge and forms a package there, which is also referred to as a spinning cake.
• the centrifuge speed and the delivery speed of the original material are coordinated with one another in such a way that the thread deposited as a spinning cake already has its full rotation and in a subsequent work step to one preferably on the thread guide tube ready winding tube can be wrapped.
• the spinning bobbin created during this rewinding process is then doped and later rewound on a winding machine connected in the production process with further spinning bobbins to form a large-volume cross-wound bobbin.
• the known centrifuge spinning devices can differ significantly, for example with regard to the shape of their spinning centrifuge.
• a centrifuge spinning device which has a tubular, that is, spinning centrifuge open at the top and bottom.
• a thread guide tube from which a rewinding sleeve is slidably held, is held from above.
• the centrifuge spinning element is supported by permanent magnet bearings and is actuated by an electromagnetic drive.
• the electromagnetic drive is generally arranged between the bearings.
• the thread guide tube is passed through the centrifuge neck and, as usual, can oscillate and at the same time be axially displaced in the direction of a lower centrifuge opening.
• the winding tube is inserted into the spinning centrifuge through the centrifuge opening below.
• Such a flyer winding has the advantage due to its structure that it remains accessible even after a thread break during the spinning process or after a winding break during the rewinding process, but the spinning heads produced often cause difficulties in subsequent work processes, since the downstream automatic winder is usually used for the Machining ring spools are designed.
• the invention has for its object to develop a method for operating a centrifuge spinning device, which ensures that both in the event of a thread break during the spinning process, and in the event of a winding break during the rewinding process, a package can be produced and is hopable, which can subsequently be further processed without problems by automatic winding machines.
• the method according to the invention has the particular advantage that it reliably prevents a yarn tendon from being accidentally caught, in particular after a thread break during the spinning process, and thus a rewinding operation is initiated in an uncontrolled manner, since an uncontrolled rewinding operation leads to at least one unusable spinning cop, often even damage to the centrifuge spinning device.
• the package wound on the rewinding tube always has a predetermined position on the rewinding tube, which is extremely advantageous in particular with regard to the subsequent further processing of the spinning bobbins in the preparation stations of the automatic winder.
• the rewinding sleeve for initiating a rewinding process is lowered at a feed rate which is matched to the vertical unwinding speed of the thread stored as a yarn cake. This means that the feed speed of the winding tube is greater than the vertical unwinding speed of the thread. In this way, it is ensured that the yarn cake is completely rewound onto the winding tube in a later operation.
• the vertical unwinding speed of the thread can be influenced in various ways via the traversing movement of the thread guide tube.
• the thread guide tube is shifted into the rewinding position at “normal” traversing speed and then remains somewhat in this position.
• the thread guide tube is first shifted into the rewinding position at a "normal" traversing speed, but then carries out a few short traversing strokes in this area.
• the short traversing strokes have a positive effect on the thread placement, that is, the deposited thread layers are very easy to unwind.
• the winding tube is moved when moving into the winding position by a distance which, as described in claim 6, comprises the height of the winding cone of the package, the wobble of the winding tube and the length of the unwound winding tube end.
• the distance by which the rewinding sleeve is moved to initiate the rewinding process is as in
• Claim 7 indicated, about 50 mm.
• Rewinding tube in relation to the rotating yarn leg realizable, as well as the free tube end ensures that the spinning cop at subsequent
• the spinning heads constructed in this way are both
• the starting position for setting the sleeve advance is always the lower edge of the winding cone of the package, which is given by the bottom dead center of the traverse stroke. In this way it is ensured that the package after winding on the winding tube, regardless of the shape of the winding cone or the time of initiation of the winding process and thus regardless of the size of the package stored in the centrifugal spinning element, always occupies the same position on the winding tube.
• the distance between the lower edge of the winding tube and the start of the cop winding on the winding tube is always constant and, as already indicated above and set out in claim 9, is preferably about 15 mm.
• the length of the package is chosen so that the usable inner length of the centrifuge spinning element is optimally used, the length of the rewinding sleeve being minimized.
• the centrifuge spinning device can be designed as a compact, space-saving structural unit.
• the maximum length of the package preferably results from the usable inner length of the
• Centrifugal spinning element minus twice a safety distance at the end of, for example, 5 mm each.
• the safety clearances primarily ensure safe placement of the yarn cake on the inner wall of the centrifuge spinning element.
• the minimum length of the winding tube is calculated accordingly from the maximum length of the package plus the length of the two free, unwound tube ends.
• the response time of the sensor must be such that it is ensured that, in the event of a thread break, the thread guide tube already executes a traversing movement in the direction of the winding position before the lower end of the winding sleeve reaches the region of the thread break.
• FIG. 1 is a side view of a centrifuge spinning device as used in the implementation of the method according to the invention
• FIG. 1 schematically shows a first embodiment of a centrifuge spinning device 1 which can advantageously be used when carrying out the method according to the invention.
• the centrifuge spinning device 1 has a centrifuge spinning element 3 in the form of a so-called pot centrifuge.
• the centrifuge spinning element 3 rotating in a spinning housing 2 is supported in bearings 4 and is driven by a single motor via an electromagnetic drive 5.
• the bearings 5 are designed as magnetic bearings, preferably as permanent magnetic bearings.
• the neck area of the pot centrifuge is covered by a changeable and at the same time axially displaceable thread guide tube 7.
• the thread guide tube 7, which can be inserted into the centrifuge spinning element 3, is connected to a drive 8, which is only indicated schematically in the figures.
• the thread guide tube 7 executes a traversing stroke 30, that is to say the thread guide tube 7 is traversed between the upper and lower dead centers 24A and 24B and at the same time is axially displaced.
• a rewinding sleeve 9 is slidably mounted on the thread guide tube 7 and is connected, for example, to the hollow piston rod of a pneumatic cylinder 10 surrounding the thread guide tube 7, which can be controlled in a defined manner.
• the winding tube 9 is fixed during the normal spinning process via the pneumatic cylinder 10 with respect to the thread guide tube 7 in a rest position 33 and can be shifted into a winding position 34 to initiate the winding process, as will be explained in more detail below.
• the centrifuge spinning device 1 can also have a tubular spinning centrifuge 3, as shown for example in FIGS. 2A, 2B and 3A, 3B.
• a tubular spinning centrifuge 3 As shown for example in FIGS. 2A, 2B and 3A, 3B.
• Such an embodiment also has a thread guide tube 7 which reaches into the tubular spinning centrifuge 3 from above.
• a winding sleeve 9 is slidably arranged on the thread guide tube 7.
• the winding tube 9 is positioned in its rest position 33 on the thread guide tube 7 in such a way that the lower edge 11 of the winding tube 9 is somewhat set back relative to the mouth 12 of the thread guide tube 7.
• This distance referred to below as the sleeve extension 21, is preferably approximately 5 mm.
• Both embodiments of a centrifuge spinning device 1 also have a sensor device 13 or 13A for detecting a yarn break and a yarn release device 14 for initiating an external winding operation.
• the sensor device 13 or 13A is connected via a signal line 20 or 20A to a spinning station's own control device 19.
• the sensor device 13 is either arranged below the drafting device 6 and then monitors the current feed material 18 or, as indicated by dashed lines, the sensor device 13A is positioned below the centrifugal spinning element 3 and then monitors the rotation of the rotating yarn leg 28.
• the sensor device 13A is designed, for example, as a light sensor.
• a thread release device 14 is provided for the external initiation of a wrapping process.
• the thread releasing device 14 is used, for example, after a thread break during the spinning process or after a winding break during the rewinding process and has a drive 23 which moves the Thread release element 14 allows parallel to the inner wall 25 of the centrifuge.
• the thread release element 14 has a cutting edge 16 which can be adjusted to the winding cone 22 of the package 15 and a thread guiding contour 17 which encompasses the cutting edge 16 in the axial direction.
• a sliver drafting device for example a drafting device 6, is arranged above the centrifuge spinning element 3.
• a fiber sliver is fed to this drafting device 6 either from a (not shown) spinning can or a roving from a (also not shown) flyer spool.
• the correspondingly stretched original material 18 is, preferably via the sensor device 13 and the thread guide tube 7 in the interior of the
• Centrifugal spinning element 3 passed, where it rests against the inner wall 25 of the rotating centrifugal spinning element 3 to form a rotating yarn leg 28 and thereby receives a rotation.
• the thread resulting from the rotation is positioned by the thread guide tube 7 on the inner wall 25 of the centrifuge spinning element 3 in such a way that a defined package, a so-called spinning cake 15, is produced.
• the thread guide tube 7 is moved up and down in an oscillating manner via the drive 8.
• the thread guide tube 7 is continuously lowered in the direction of the centrifuge opening 27 via the drive 8.
• the spun thread is thereby deposited on the inner wall 25 of the centrifuge spinning element 3 in the manner of a so-called cop winding. If the package 15 has reached a predetermined size or if a thread break occurs during the spinning process, a rewinding process is initiated according to the invention by the following methods:
• FIGS. 2A to 2E takes place with a regular spinning end, while the process shown in FIGS. 3A to 3E is used in the event of a thread break during the spinning process.
• the traversing stroke 30 is shifted to the top dead center 24B of the traversing stroke 30.
• the winding tube 9 catches the rotating yarn leg 28 with its lower edge 11, which triggers the winding process.
• Centrifugal spinning element 3 with an upper (39) and a lower (39A) safety distance of the deposited spinning cake 15 is, as indicated in FIGS. 2C and 2D, wound onto the winding tube 9, the winding process always taking place in the region of the winding cone 22 which moves upward. Since the first winding layer is first unwound towards the free tube end 35, the feed speed of the winding tube 9 in the region of the winding cone 22 must be greater than the axial unwinding speed of the thread.
• the spinning head 36 is by axial displacement of the
• Thread guide tube 7 is moved to a stop 37, which defines the Doff position of the spinning cop 36, as shown in FIG. 2E.
• the spinning cop 36 can then be forwarded by means of a transport device 38, which is only indicated schematically in FIG. 2E, to a textile machine, preferably a winding machine, which is connected downstream (not shown) in the production process.
• a transport device 38 which is only indicated schematically in FIG. 2E
• a textile machine preferably a winding machine, which is connected downstream (not shown) in the production process.
• the method according to the invention proceeds in a similar manner if a thread break occurs during the spinning process, which is indicated in FIGS. 3A-3E.
• Sensor device 13 is detected and reported to control device 19 via signal line 20.
• the control device 19 then ensures that, on the one hand, the further supply of original material 18 is stopped and, on the other hand, the drive 8 of the thread guide tube 7 is controlled such that the thread guide tube 7 immediately into a
• Upward traversing movement 32 passes over or, if an upward traversing movement is present at the time the thread breaks, this is maintained.
• Thread guide tube 7 ended, for example.
• the rewinding sleeve 9 is pushed into its rewinding position 34 by means of the pneumatic cylinder 10 and the thread releasing element 14 from below into the Centrifuge spinning element 3 retracted, as shown in Fig.3C.
• Centrifuge spinning element 3 wrapped on the rewinding sleeve 9.
• the thread guide contour 17 on the thread release element 14 prevents the thread release element 14 from being inadvertently wrapped around.
• the spinning cop 36 is moved by moving the thread guide tube 7 to a stop 37 into a doff position, in which the spinning cop 36 by a
• Transport device 38 can be taken over and transported away for further processing.
• FIG. 4B Another variant indicated in FIG. 4B provides for the last upward traversing movement 32 of the thread guide tube 7 to be included To drive "normal” traversing speed and then to connect some additional short traversing strokes 40 in the area of top dead center 31.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Spinning Or Twisting Of Yarns (AREA)
• Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
• Winding Filamentary Materials (AREA)

Applications Claiming Priority (3)

Publications (2)

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• 2002
  • 2002-03-18 DE DE10211850A patent/DE10211850A1/de not_active Withdrawn
• 2003
  • 2003-03-18 EP EP03714847A patent/EP1488030B1/fr not_active Expired - Lifetime
  • 2003-03-18 WO PCT/EP2003/002805 patent/WO2003078708A1/fr active IP Right Grant
  • 2003-03-18 AU AU2003219074A patent/AU2003219074A1/en not_active Abandoned
  • 2003-03-18 AT AT03714847T patent/ATE348906T1/de not_active IP Right Cessation
  • 2003-03-18 JP JP2003576693A patent/JP4243545B2/ja not_active Expired - Fee Related
  • 2003-03-18 CN CNB038064790A patent/CN100334275C/zh not_active Expired - Fee Related
  • 2003-03-18 DE DE50306036T patent/DE50306036D1/de not_active Expired - Fee Related

Non-Patent Citations (1)

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