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
  • D01H13/00—Other common constructional features, details or accessories
  • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
  • D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material

Definitions

• centrifugal spinning for example, is a long-known spinning process.
• centrifugal spinning In centrifugal spinning, a basic distinction is made between two different types of spinning, the so-called one-step spinning and the so-called two-step spinning.
• a feed material either a fiber sliver stored in a spinning can or a sliver of fiber as a roving bobbin, is warped in a drafting system in accordance with the desired yarn fineness and conveyed via an axially displaceably mounted thread guide tube into a centrifugal spinning element rotating at high speed.
• the feed material emerging from the mouth of the thread guide tube lies against the inner wall of the centrifuge, forming a thread leg, and is carried along by it.
• the thread created by the rotation is made changeable and axially displaceable by the thread guide tube is stored on the inner wall of the centrifuge and forms a package, a so-called spinning cake.
• the centrifuge speed and the delivery speed of the stock material are matched to one another in such a way that the thread deposited as a spinning cake already has its final rotation and is wound in a subsequent operation onto a winding tube, for example held on the thread guide tube or inserted into the centrifuge spinning element from below can be.
• the spinning bobbins created during these rewinding processes are later rewound into large-volume cross-wound bobbins by means of a winder connected downstream in the production process.
• Centrifuge spinning device described which has a tubular, supported in magnetic bearings centrifuge spinning element, which has a centrally arranged electromagnetic centrifuge drive.
• Centrifuge spinning devices designed in this way are easily accessible both from above and from below, so that a winding tube can either be inserted into the centrifuge spinning element from below, as shown in DE 42 08 039 AI, or, for example, in DE 195 23 835 AI described, slidably arranged on the thread guide tube and is then inserted into the centrifuge spinning element from above.
• tubular spinning centrifuges are easily accessible, they have the considerable disadvantage that their design means that they have a relatively high energy consumption.
• Diameter includes, leads to a relatively unfavorable
• a significantly cheaper use of energy is obtained when a so-called pot centrifuge is used, i.e. when a centrifuge spinning element is used that has a neck-like attachment on which the electromagnetic drive of the spinning centrifuge is installed.
• Such a spinning centrifuge is known for example from WO-98/11 284.
• the rewinding sleeve is inserted into the centrifuge spinning element through a centrifuge opening opposite the centrifuge neck and the finished spinning cop is removed through the same centrifuge opening.
• the spinning cake is deposited from bottom to top in these known centrifuge spinning devices.
• the rewinding process is initiated by the rewinding tube when that Thread guide tube has reached its upper end position near the bottom of the spinning centrifuge.
• the package is wound from top to bottom, that is, starting at the tube tip, onto the winding tube.
• the spinning heads produced have also proven to be disadvantageous in these known centrifuge spinning devices, since the winding direction of such spinning heads differs from spinning heads which were produced on ring spinning machines.
• the invention has for its object a
• centrifugal spinning device that does not have the aforementioned disadvantages and in particular the manufacture enabled by spinning bobbins that hardly differ from ring spinning bobbins.
• the spinning bobbins that are present after the rewinding process are constructed, for example, like spinning bobbins that were produced on a ring spinning machine and can therefore be processed without problems using conventional winding technology.
• the last deposited yarn layer of the spin cake can be reached at any time, so that an external initiation of the rewinding process is possible at any time, for example after a thread break during the spinning process or a winding break during the rewinding process.
• the thread secondary system that occurs with such an external initiation of the rewinding process is relatively short, so that the resulting spinning cop can then usually be unwound without residue on the winding machine.
• the spinning cop created after an external initiation of the rewinding process can also always be easily removed from the centrifuge spinning element. This means that a package residue remaining in the centrifugal spinning element due to a winding break does not in any way disturb the doffing process of the spinning cop and remains accessible for a possible subsequent, second external initiation of a rewinding process.
• a sensor device which monitors the current document material.
• the sensor device which is preferably positioned between the drafting device and the thread guide tube, is connected via a signal line to a corresponding control device, preferably a workstation computer, so that in the event of a thread breakage it is ensured that, for example, the further supply of fiber material into the centrifugal spinning element is interrupted and one Rewinding is initiated.
• a corresponding control device preferably a workstation computer
• the sensor device can also be arranged below the centrifuge spinning element and then monitors the rotating yarn leg.
• the sensor device is connected to the workstation computer via a signal line, which ensures that in the event of a thread break, the supply of fiber material into the centrifuge spinning element is stopped and a rewinding process is initiated.
• a thread release device is also present in a preferred embodiment, which can be adjusted in a defined manner to the winding cone of the package and thereby the rewinding of the package rotating with the centrifuge onto that on the thread guide tube arranged rewinding sleeve ready in the rewinding position starts.
• the thread release device is used both after a thread break during the spinning process and after a winding break during the rewinding process.
• Twine turned on and thus initiated a rewinding process.
• Centrifuge spinning element can be kept relatively small, which has a positive effect in particular on the energy consumption of the spinning device.
• centrifuge spinning device of a centrifuge spinning machine is shown schematically with the reference number 1.
• centrifuge spinning devices 1 which are equipped with a so-called pot centrifuge, are known in principle and are described in relatively detail, for example, in WO-98/11 284.
• Such centrifuge spinning devices 1 preferably have a centrifuge spinning element 3 rotatably mounted in a spinning housing 2, which is supported in bearings 4 and is driven by a single motor via an electromagnetic drive 5.
• the bearings 4 are preferably designed as magnetic bearings, for example as permanent magnet bearings.
• the centrifuge spinning device 1 also has a thread guide tube 7 which can be inserted into the centrifuge spinning element 3.
• a drive 8, which is only indicated schematically, is connected to the thread guide tube 7, which gives the thread guide tube 7 a traversing movement and at the same time axially displaces the thread guide tube 7 with respect to the centrifuge spinning element 3.
• a winding sleeve 9 is slidably mounted on the thread guide tube 7, for example on the hollow piston rod of a pneumatic cylinder 10 surrounding the thread guide tube 7.
• the pneumatic cylinder 10 is connected via a corresponding pneumatic line, in which a valve, for example a 2/2-way valve 22, is connected to a compressed air source (not shown).
• the valve 22 is connected to the workstation computer 19 via a control line 21.
• the rewinding sleeve 9 is fixed in a rest position 11 with respect to the thread guide tube 7 during the regular spinning process via the pneumatic cylinder 10 and can be shifted into a rewinding position 12 indicated by dashed lines, for example to initiate the rewinding process.
• the centrifuge spinning device 1 has a sensor device 13 for detecting a thread break.
• the sensor device 13 which monitors the current feed material 18, is positioned below the drafting system 6 and connected to a control device 19 belonging to the spinning station via a signal line 20.
• the sensor device 13A which is also connected to the workstation computer via a signal line 20A, is designed, for example, as a light sensor and monitors the rotation of the rotating yarn leg 28.
• a thread release element 14 is also provided.
• the thread release element 14 has a cutting edge 16 which can be adjusted to the winding cone 29 of the package 15 and a thread guide contour 17 which encompasses the cutting edge 16 in the axial direction and which can be displaced parallel to the inner wall 25 of the centrifuge via a drive 23.
• the drive 23 of the thread releasing element 14 is connected via a control line 30 to the spinning station's own control device 19, the so-called work station computer, and can be controlled in a defined manner via this. Function of the facility:
• a sliver drafting device for example a drafting device 6, arranged above the centrifuge spinning element 3, is fed a sliver from a spinning can (not shown) or a feed material 18 from a flyer spool (also not shown).
• the original material 18, for example a roving is warped in accordance with the desired fineness and passed via the thread guide tube 7 into the centrifuge spinning element 3, where it forms a rotating thread leg 28 on the inner wall 25 of the rotating one
• Centrifuge spinning element 3 creates and thereby receives a rotation.
• the thread resulting from this 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 yarn package, a so-called spin cake 15, is produced.
• the thread guide tube 7 is moved up and down in an oscillating manner via the drive 8 and at the same time is continuously lowered in the direction of the centrifuge opening 27.
• the spun thread is thereby temporarily stored in the manner of a so-called cop winding on the inner wall 25 of the centrifuge spinning element 3.
• Rewinding position 12 shifted in the region of the rotating yarn leg 28.
• the spinning cop resulting from the rewinding is then doped via the centrifuge opening 27 and fed, for example, to a downstream winder.
• a thread break occurs during the spinning process, such a thread break is immediately detected by the sensor device 13 or 13A and reported directly to the control device 19 via the signal line 20 or 20A.
• the control device 19 then immediately activates the match stop device and also ensures that the thread guide tube 7 is shifted to the next top dead center of its traversing stroke.
• the control device 19 then activates the directional control valve 22 via a signal line 21 and the drive 23 of the thread release device 14 via a signal line 30.
• the directional control valve 22 then ensures that the pneumatic cylinder 10 pushes the rewinding sleeve 9 out of its rest position 11 into its rewinding position 12 during the Drive 23 moves the thread releasing device 14 into the centrifuge spinning element 3 parallel to the inner wall 25.
• the thread release device 14 finally lies with its cutting edge 16 on the winding cone 29 of the package 15. When the cutting edge 16 is placed on the winding cone 29, a thread loop is released from the package 15 rotating with the centrifugal spinning element 3, which winds around the winding tube 9 and thus initiating the rewinding process.
• the yarn body 15 originally deposited on the inner wall 25 of the centrifuge spinning element 3 is wound onto the rewinding sleeve 9 provided in the rewinding position 12 and thereby forms a spinning cop.
• the spinning cop (not shown) is then removed through the centrifuge opening 27 and transferred to a downstream textile machine, preferably a winder, for further processing.
• the thread releasing device 14 is also used if a winding break occurred during the rewinding process. That is, if only a part of the package 15 could be rewound onto the winding tube 9. Even in such a case, after the partially wound spinning cop is doped and a new rewinding sleeve 9 has been positioned on the thread guide tube 7 in the rewinding position, the thread release device 14 is retracted into the centrifuge spinning element 3 by means of its drive 23 and initiates a new rewinding process.

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

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• 2002
  • 2002-03-18 DE DE10211862A patent/DE10211862A1/de not_active Withdrawn
• 2003
  • 2003-03-18 EP EP03714846A patent/EP1488028B1/fr not_active Expired - Lifetime
  • 2003-03-18 AT AT03714846T patent/ATE348905T1/de not_active IP Right Cessation
  • 2003-03-18 WO PCT/EP2003/002804 patent/WO2003078706A1/fr active IP Right Grant
  • 2003-03-18 JP JP2003576691A patent/JP2005520938A/ja active Pending
  • 2003-03-18 CN CN03806478.2A patent/CN1643194B/zh not_active Expired - Fee Related
  • 2003-03-18 DE DE50306035T patent/DE50306035D1/de not_active Expired - Fee Related
  • 2003-03-18 AU AU2003219073A patent/AU2003219073A1/en not_active Abandoned

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