EP3992336A1 - Spinnstation einer rotorspinnmaschine mit verbesserter garnaufnahmevorrichtung, rotorspinnmaschine und zugehöriges spinnverfahren - Google Patents

Spinnstation einer rotorspinnmaschine mit verbesserter garnaufnahmevorrichtung, rotorspinnmaschine und zugehöriges spinnverfahren Download PDF

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Publication number
EP3992336A1
EP3992336A1 EP21203874.9A EP21203874A EP3992336A1 EP 3992336 A1 EP3992336 A1 EP 3992336A1 EP 21203874 A EP21203874 A EP 21203874A EP 3992336 A1 EP3992336 A1 EP 3992336A1
Authority
EP
European Patent Office
Prior art keywords
yarn
spinning
take
winding
package
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.)
Withdrawn
Application number
EP21203874.9A
Other languages
English (en)
French (fr)
Inventor
Petr ZELENKA
David Tomek
Miloslav SOUKUP
Ruggero Nicodemo
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.)
Savio Macchine Tessili SpA
Original Assignee
Savio Macchine Tessili SpA
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 Savio Macchine Tessili SpA filed Critical Savio Macchine Tessili SpA
Publication of EP3992336A1 publication Critical patent/EP3992336A1/de
Withdrawn legal-status Critical Current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
    • D01H4/42—Control of driving or stopping
    • D01H4/44—Control of driving or stopping 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
    • D01H4/40—Removing running yarn from the yarn forming region, e.g. using tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/20—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage
    • B65H51/205—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage by means of a fluid
    • 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
    • D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the present invention relates to a spinning station of a rotor spinning machine with an improved yarn take-up device, a rotor spinning machine and a method for taking-up a yarn.
  • a spinning station is indicated as a whole with 30.
  • the spinning station 30 typically belongs to rotor spinning machine (not shown).
  • the spinning station 30 and the rotor spinning machine may be of any type, shape and size.
  • the spinning station 30 comprises a sliver feeding mechanism 21, an opening mechanism 22, a spinning rotor 19 producing a yarn 5 from said sliver.
  • the spinning station 30 comprises a yarn take-up device 6 comprising a take-up roller 11 and a pressing roller 12 cooperating each other with the yarn 5 coming from said spinning rotor 19.
  • the spinning station 30 comprises moreover a winding mechanism comprising a winding roller 13 and a package 15 so as to wind said yarn on said package 15.
  • the yarn take-up device 6 intercepts the yarn 5 and comprises a tube 4 (or suction throat 4) able to house and accumulate at least partially said yarn 5.
  • the spinning station 30 comprises a control unit 25 operatively connected with said yarn take-up mechanism 6, with said sliver feeding mechanism 21 and with said winding mechanism 14.
  • control unit 25 is programmed so that during spinning and/or piecing cycle, the yarn take-up device 6 sucks at least partially a portion of the yarn within said tube 4, in order to control the loosening of the yarn 5 during spinning and then gradually releases it back for winding.
  • the yarn take-up device 6 contains an air injector 1 to create a negative pressure 9 within said tube 4 by means of compressed air 8, so as to suck said yarn 5.
  • the yarn take-up device 6 sucks at least partially a portion of the yarn 5 within said tube 4, when the yarn 5 is running.
  • the spinning station 30 comprises a compressed air system which is operatively connected both to the yarn take-up device 6 and to a pressure device 16 (typically an arm) acting on said winding roller 13 and/or package 15 so as to modify the contact pressure between them.
  • a pressure device 16 typically an arm
  • control unit 25 by means of said compressed air system, modifies the pressure contact between the winding roller 13 and the package 15 in relation to the loosening of the yarn 5 and the length of yarn 5 intercepted by the yarn take-up device 6.
  • said compressed air system has a nozzle 3 of the injector 1 with an adjustable diameter.
  • the nozzle 3 of the injector 1 has exchangeable shape variants.
  • the flow of compressed air 8 into the nozzle 3 is not continuous.
  • control unit 25 is programmed so that the switching on and off of the compressed air 8 is controlled at each location of the machine individually, in parts or simultaneously.
  • control unit is programmed so that at a time before the winding of the yarn 5 on the package 15, i.e. when the package 15 is not yet in contact with the winding roller 13, the yarn take-up device 6 temporarily takes-up the yarn 5 and then gradually releases it for winding.
  • a negative pressure 9 is created in the suction nozzle or tube 4, which is located near the yarn spinning axis and at a time when the yarn take-up is stopped, i.e. the pressure roller 12 is not in contact with the take-up roller 11, it helps to get the yarn 23 evenly from the yarn base pin 24 to the spinning axis, and thus evenly the yarn end 20 gets to the rotor 19 for piecing, on condition that the suction of the yarn take-up device 6 is modulated so as not to influence or interfere with the suction of the rotor 19.
  • the suction nozzle or tube 4 has interchangeable shapes that can be replaced as needed to achieve the best take-up of yarn.
  • the compressed air supply 8 is connected via a valve 28 from the control unit 25 of the spinning station 30, which controls it and which can also be connected from the yarn presence sensor 26 for possible adjustment of the start time of this device.
  • the air supply 8 can be closed, which can be done either by fixed setting the take-up time or by a yarn presence sensor.
  • this device can also be advantageously used to reduce the loosening of the yarn 5 during winding on the package 15 due to the construction of soft packages or other non-standard packages. It is possible to use full flow with a smaller nozzle 3 or intermittent air flow, which will significantly reduce the demands on compressed air for longer use. The same principle can be used when winding conical packages 15, where periodic loosening occurs due to different package diameters.
  • the yarn take-up device 6 can also be used to reduce loosening during stopping and restarting spinning on rotor spinning machines with a controlled stopping and starting function, both with a standard machine power supply and in the event of a power failure.
  • a negative pressure is created for the correct tension of the yarn during unwinding on the package.
  • the yarn can be tensioned again with this device and, if necessary, the excess yarn can be withdrawn for a while and then gradually released to winding before the withdrawal moves back, when the yarn end is introduced into the rotor.
  • this device is switched on before the start of shearing and a full or intermittent air flow 8 creates the necessary pressure 9 to suck loose yarn 60 into the suction nozzle or tube 4 of the jet pump (injector) 1 and thus reduces any loosening caused, for example, by greater friction of the yarn on some part of the line or insufficient vacuum in the exhaust pipe of the doffer or the auxiliary exhaust pipe of the machine.
  • the activation time of the yarn take-up device is function of different variables including, for example, the yarn count processed, the winding speed, the material of the yarn and so on.
  • the activation time of the yarn take-up device can be calculated and set by the central processing unit of the machine, automatically or it can be set also manually.
  • the present invention allows the drawbacks introduced in the known art to be overcome.
  • the solution according the invention comprising a yarn take-up device which is switched on before the take-up starts solves the problem of reducing as much as possible the transients of yarn take up and yarn piecing phases.
  • the device also sufficiently solves the problems with unsatisfactory yarn tension during the spinning of soft or otherwise non-standard windings or conical bobbins and thus improves the quality of the winding. Furthermore, it can be advantageously used for automatic doffing.
  • the device according to the invention can also be advantageously used to reduce the loosening of the yarn during winding on the package due to the construction of soft packages or other non-standard packages. For example, It is possible to use full flow with a smaller nozzle or intermittent air flow, which will significantly reduce the demands on compressed air for longer use. The same principle can be used when winding conical packages, where periodic loosening occurs due to different package diameters.
  • the device can also be used to reduce loosening during stopping and restarting spinning on rotor spinning machines with a controlled stopping and starting function, both with a standard machine power supply and in the event of a power failure.
  • a negative pressure is created for the correct tension of the yarn during unwinding on the package.
  • the yarn can be tensioned again with this device and, if necessary, the excess yarn can be withdrawn for a while and then gradually released to winding before the withdrawal moves back, when the yarn end is introduced into the rotor.
  • this device can be switched on before the start of shearing and a full or intermittent air flow creates the necessary pressure to suck loose yarn into the suction nozzle of the jet pump (injector) and thus reduces any loosening caused, for example, by greater friction of the yarn on some part of the line or insufficient vacuum in the exhaust pipe of the doffer or the auxiliary exhaust pipe of the machine.
  • a local air injector to create a negative pressure within the tube of the yarn take-up device by means of compressed air, so as to suck said yarn, is a real improvement with respect to the use of a centralised air intake plant of the spinning machine.
  • a local air injector gives the possibility of obtain a precise value of negative pressure in the tube with respect to a centralised solution.
  • the control of the length and of the tension of the yarn is more precise with respect to a solution using the centralised intake system.
  • this device can be used on automatic or semi-automatic machines as a part of a self-contained part of the machine.
  • the solution according to the present invention largely eliminates problems with the formation of loose yarn being wound onto a package on rotor fine spinning machines, which can cause problems during further processing, especially in the case of:
  • the solution provides a reduction of loosening during stopping and starting of a plurality of spinning units and it significantly eliminates the deficiencies in the varying speed of insertion and subsequent removal of the yarn from the rotor during spinning-in.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Winding Filamentary Materials (AREA)
EP21203874.9A 2020-10-30 2021-10-21 Spinnstation einer rotorspinnmaschine mit verbesserter garnaufnahmevorrichtung, rotorspinnmaschine und zugehöriges spinnverfahren Withdrawn EP3992336A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102020000025831A IT202000025831A1 (it) 2020-10-30 2020-10-30 Stazione di filatura di una macchina di filatura a rotore con dispositivo di avvolgimento del filato migliorato, macchina di filatura a rotore e relativo metodo di filatura

Publications (1)

Publication Number Publication Date
EP3992336A1 true EP3992336A1 (de) 2022-05-04

Family

ID=74141767

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21203874.9A Withdrawn EP3992336A1 (de) 2020-10-30 2021-10-21 Spinnstation einer rotorspinnmaschine mit verbesserter garnaufnahmevorrichtung, rotorspinnmaschine und zugehöriges spinnverfahren

Country Status (3)

Country Link
EP (1) EP3992336A1 (de)
CN (2) CN114438630A (de)
IT (1) IT202000025831A1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006047288A1 (de) * 2006-10-06 2008-04-10 Oerlikon Textile Gmbh & Co. Kg Arbeitsstelle einer Textilmaschine
EP2184387A1 (de) * 2008-11-08 2010-05-12 Oerlikon Textile GmbH & Co. KG Verfahren zum Betreiben einer Offenend-Spinnmaschine und Offenend-Spinnmaschine
DE102013009998A1 (de) * 2013-06-14 2014-12-18 Saurer Germany Gmbh & Co. Kg Verfahren zum Betreiben einer Arbeitsstelle einer Offenend-Rotorspinnmaschine sowie zugehörige Arbeitsstelle
DE102016108391A1 (de) * 2015-05-14 2016-11-17 Rieter Cz S.R.O. Verfahren zum Garnmassenanspinnen auf den Arbeitsstellen einer Rotorspinnmaschine und Einrichtung zu dessen Ausführung
EP3693308A1 (de) * 2019-02-08 2020-08-12 Saurer Spinning Solutions GmbH & Co. KG Fadenspeicherrohr für eine arbeitsstelle einer textilmaschine sowie arbeitsstelle einer textilmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006047288A1 (de) * 2006-10-06 2008-04-10 Oerlikon Textile Gmbh & Co. Kg Arbeitsstelle einer Textilmaschine
EP2184387A1 (de) * 2008-11-08 2010-05-12 Oerlikon Textile GmbH & Co. KG Verfahren zum Betreiben einer Offenend-Spinnmaschine und Offenend-Spinnmaschine
DE102013009998A1 (de) * 2013-06-14 2014-12-18 Saurer Germany Gmbh & Co. Kg Verfahren zum Betreiben einer Arbeitsstelle einer Offenend-Rotorspinnmaschine sowie zugehörige Arbeitsstelle
DE102016108391A1 (de) * 2015-05-14 2016-11-17 Rieter Cz S.R.O. Verfahren zum Garnmassenanspinnen auf den Arbeitsstellen einer Rotorspinnmaschine und Einrichtung zu dessen Ausführung
EP3693308A1 (de) * 2019-02-08 2020-08-12 Saurer Spinning Solutions GmbH & Co. KG Fadenspeicherrohr für eine arbeitsstelle einer textilmaschine sowie arbeitsstelle einer textilmaschine

Also Published As

Publication number Publication date
CN114438630A (zh) 2022-05-06
CN216809057U (zh) 2022-06-24
IT202000025831A1 (it) 2022-04-30

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