EP0417849A1 - Method for eliminating the yarn portion clamped and wound at the end of the winding tube, and a device for implementing the method - Google Patents

Method for eliminating the yarn portion clamped and wound at the end of the winding tube, and a device for implementing the method Download PDF

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Publication number
EP0417849A1
EP0417849A1 EP90202384A EP90202384A EP0417849A1 EP 0417849 A1 EP0417849 A1 EP 0417849A1 EP 90202384 A EP90202384 A EP 90202384A EP 90202384 A EP90202384 A EP 90202384A EP 0417849 A1 EP0417849 A1 EP 0417849A1
Authority
EP
European Patent Office
Prior art keywords
tube
yarn
bobbin
clamped
support arm
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Withdrawn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
EP90202384A
Other languages
German (de)
English (en)
French (fr)
Inventor
Luigi Colli
Roberto Badiali
Amedeo Quaia
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 SpA
Savio Macchine Tessili SpA
Original Assignee
Savio SpA
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 SpA, Savio Macchine Tessili SpA filed Critical Savio SpA
Publication of EP0417849A1 publication Critical patent/EP0417849A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/70—Other constructional features of yarn-winding machines
    • B65H54/71—Arrangements for severing filamentary materials
    • 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

  • This invention relates to a method for eliminating the yarn portion clamped and wound at the end of a winding tube. More particularly, the invention relates to a method for cutting the yarn along the section between the bobbin under formation and the point at which the tube is clamped to the holding centre, said method being usable in winding machines, and particularly in automatic bobbin winding machines.
  • connecting yarn reserve signifies the initial yarn turns wound onto the tube, the purpose of which is to fix the yarn to the tube to facilitate proper winding from the initial turns onwards.
  • Said connecting reserve is usually formed by clamping the yarn end at the commencement of the winding cycle between the tube end and the holding centre of the bobbin support arm. At every yarn breakage and rejoining cycle, and also on termination of each feed package and on completion of each bobbin winding operation, the bobbin rotated by the drive roller is raised and then halted to enable the known yarn rejoining cycle to proceed.
  • the applicant has tested a method for eliminating the yarn portion clamped at the end of the winding tube and has constructed the device for implementing the method.
  • the object of the present invention is therefore not only to free service personnel from the task of watching out for any tangling of the free yarns from the bobbins, but also to ensure that the twisting operation runs correctly.
  • the present invention provides a method for eliminating the yarn portion clamped and wound at the end of a winding tube for the purpose of forming a bobbin in a winding machine in which as the yarn portion positioned between the yarn turns wound on the tube and the region in which the tube is clamped to the holding centre of the bobbin support arm moves radially outwards by the action of centrifugal force, it undergoes a circumferential trajectory which is increasingly displaced outwards as it slackens, and thus becomes continuously wider until said portion interferes at one point with a cutting element which is located in a radially fixed position above it and rapidly cuts the yarn to thus interrupt its continuity between the bobbin package and said holding centre.
  • the method of the present invention also includes sucking and removing, through a suction port which is activated when the bobbin support arm opens, that yarn portion which is clamped between the tube and holding centre but which has been previously cut and separated from the yarn wound on the tube.
  • the method of the present invention is implemented by a device comprising a fixed cutting blade supported by a bracket rigidly fixed to the bobbin support arm, said blade being positioned slightly above and approximately in the middle of said yarn portion when extending taut between the yarn turns wound on the tube and the point at which the tube is clamped to the holding centre of the bobbin support arm.
  • 1 is the grooved feed roller or motorized drive roller for the bobbin under formation (and in the present case shown only schematically as it is unimportant for the purposes of the present invention); 2 is the yarn portion which at the commencement of winding is clamped between the tube and holding centre of the bobbin support arm; 3 is the cutting element or cutting blade fixed rigidly to the flat element 9, this latter element being fixed to the control lever 8 for opening the holding centre of the bobbin support arm.
  • Said cutting blade 3 is fixed such that it can position itself slightly above the yarn when this is taut between the point at which it is clamped between the tube and holding centre and the first yarn turn on the tube 4;
  • 4 is the tube which supports the crossed yarn winding for forming the bobbin 5 of any shape and size;
  • 6 is the suction port which is activated each time the bobbin support arm 14 is opened by the lever 8, which by known means drags the rotatable holding centre 10 of the bobbin support arm 14 into the open position with transverse movement;
  • 7 is the yarn, which rises as it winds; 21 is a yarn turn, which is deposited as a continuous spiral on the tube 4;
  • 8a is the position assumed by the lever 8 on opening the bobbin support arm to allow doffing of the full bobbin 5 and insertion of the tube 4 for forming a new bobbin;
  • 11 is the lever of the microswitch 15;
  • 18 is the solenoid valve which when energized by the microswitch 15 opens
  • the device for implementing the method of the present invention and shown on the figures of the accompanying drawing is of easily understandable operation.
  • the yarn 7 On commencement of winding the yarn 7 is clamped by known methods and means between the tube 4 and the mobile holding centre 10.
  • Said holding centre supports the tube and fixes it onto the bobbin support arm 14.
  • the mobile holding centre 10 moves into its closed position to thus clamp the new tube 4, said movement deactivating the elements 15 and 18, to shut off suction in the duct 12 by means of the actuator 19 and thus nullify the suction action of the port 2.
  • the described embodiment has been presented as a non-limiting example of the invention.
  • the mobile port can be positioned on the doffing carriage so as to be brought up to the mobile holding centre 10 only when doffing is to take place, to perform a function analogous to that heretofore described.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
EP90202384A 1989-09-15 1990-09-07 Method for eliminating the yarn portion clamped and wound at the end of the winding tube, and a device for implementing the method Withdrawn EP0417849A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2173889 1989-09-15
IT8921738A IT1231706B (it) 1989-09-15 1989-09-15 Metodo per eliminare il tratto di filo pinzato ed avvolto all'estremita' del tubetto di avvolgimento e dispositivo per l'attuazione di tale metodo.

Publications (1)

Publication Number Publication Date
EP0417849A1 true EP0417849A1 (en) 1991-03-20

Family

ID=11186180

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90202384A Withdrawn EP0417849A1 (en) 1989-09-15 1990-09-07 Method for eliminating the yarn portion clamped and wound at the end of the winding tube, and a device for implementing the method

Country Status (2)

Country Link
EP (1) EP0417849A1 (it)
IT (1) IT1231706B (it)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4331308A1 (de) * 1993-09-15 1995-03-16 Schlafhorst & Co W Abspulstelle eines Spulautomaten
DE19931878A1 (de) * 1999-07-09 2001-01-18 Rieter Ingolstadt Spinnerei Verfahren und Vorrichtung zum Warten einer Textilmaschine
US6375114B1 (en) 2000-06-29 2002-04-23 Rieter Ingolstadt Spinnereimaschinenbau Ag Process and an apparatus for the servicing of a textile machine

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB543373A (en) * 1939-08-25 1942-02-23 Schweiter Ag Maschf Improvements in and relating to cop-winding machines with automatic cop-tube changing devices
US2575015A (en) * 1945-04-21 1951-11-13 Whitin Machine Works Thread cutter for bobbin winders
US2578755A (en) * 1948-01-12 1951-12-18 United Shoe Machinery Corp Thread cutter for bobbin winders
US2634917A (en) * 1950-08-16 1953-04-14 Deering Milliken Res Trust Tail cutter for winding machines
US2646936A (en) * 1951-02-06 1953-07-28 Continental Elastic Corp Thread end release and cutting mechanism
DE1214583B (de) * 1960-04-08 1966-04-14 Reiners Walter Dr Ing Spulenhalter fuer die Auflaufspulen an Spulmaschinen, insbesondere Kreuzspulmaschinen
GB1069612A (en) * 1964-02-28 1967-05-24 Eizaburo Negishi Method of producing a package on a bobbin and apparatus for catching an end of a feed yarn on a bobbin in a pirn winder and like winders
FR2307746A1 (fr) * 1975-04-16 1976-11-12 Rieter Ag Maschf Procede et dispositif pour saisir, sectionner un fil, et le mettre en place sur un tube vide

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB543373A (en) * 1939-08-25 1942-02-23 Schweiter Ag Maschf Improvements in and relating to cop-winding machines with automatic cop-tube changing devices
US2575015A (en) * 1945-04-21 1951-11-13 Whitin Machine Works Thread cutter for bobbin winders
US2578755A (en) * 1948-01-12 1951-12-18 United Shoe Machinery Corp Thread cutter for bobbin winders
US2634917A (en) * 1950-08-16 1953-04-14 Deering Milliken Res Trust Tail cutter for winding machines
US2646936A (en) * 1951-02-06 1953-07-28 Continental Elastic Corp Thread end release and cutting mechanism
DE1214583B (de) * 1960-04-08 1966-04-14 Reiners Walter Dr Ing Spulenhalter fuer die Auflaufspulen an Spulmaschinen, insbesondere Kreuzspulmaschinen
GB1069612A (en) * 1964-02-28 1967-05-24 Eizaburo Negishi Method of producing a package on a bobbin and apparatus for catching an end of a feed yarn on a bobbin in a pirn winder and like winders
FR2307746A1 (fr) * 1975-04-16 1976-11-12 Rieter Ag Maschf Procede et dispositif pour saisir, sectionner un fil, et le mettre en place sur un tube vide

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4331308A1 (de) * 1993-09-15 1995-03-16 Schlafhorst & Co W Abspulstelle eines Spulautomaten
DE19931878A1 (de) * 1999-07-09 2001-01-18 Rieter Ingolstadt Spinnerei Verfahren und Vorrichtung zum Warten einer Textilmaschine
US6375114B1 (en) 2000-06-29 2002-04-23 Rieter Ingolstadt Spinnereimaschinenbau Ag Process and an apparatus for the servicing of a textile machine

Also Published As

Publication number Publication date
IT1231706B (it) 1991-12-20
IT8921738A0 (it) 1989-09-15

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