EP0547845A1 - Thread cutting method and apparatus - Google Patents

Thread cutting method and apparatus Download PDF

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Publication number
EP0547845A1
EP0547845A1 EP92311345A EP92311345A EP0547845A1 EP 0547845 A1 EP0547845 A1 EP 0547845A1 EP 92311345 A EP92311345 A EP 92311345A EP 92311345 A EP92311345 A EP 92311345A EP 0547845 A1 EP0547845 A1 EP 0547845A1
Authority
EP
European Patent Office
Prior art keywords
thread
cutter
blade edge
shaped blade
valley portion
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Withdrawn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
EP92311345A
Other languages
German (de)
English (en)
French (fr)
Inventor
Juro Matsuyama Fact.Teijin Seiki Co.Ld Tachibana
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.)
Nabtesco Corp
Original Assignee
Teijin Seiki Co Ltd
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 Teijin Seiki Co Ltd filed Critical Teijin Seiki Co Ltd
Publication of EP0547845A1 publication Critical patent/EP0547845A1/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Withdrawn legal-status Critical Current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
    • 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
    • D01H9/16—Yarn-severing arrangements, e.g. for cutting transfer tails; Separating of roving in flyer
    • 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 thread cutting method and apparatus, and more particularly to a thread cutting method and apparatus by which a thread currently being wound on a bobbin of an automatic winder is cut when the bobbin is exchanged.
  • an automatic winder with bobbin switching means there is provided a cutting apparatus by which a thread currently being wound on the bobbin is cut when the bobbin is switched.
  • FIGs. 7 and 8 A conventional thread cutting apparatuses such as this is shown in Figs. 7 and 8 by way of example.
  • a solenoid 1 when a solenoid 1 is electrically connected, it retracts a plunger 1a connected to a cutter 2, and the cutter 2 is raised from a position indicated by the solid line in Fig. 7.
  • a spring 3 is interposed between the solenoid 1 and the cutter 2 and is compressed in proportion to an amount that the plunger 1a is retracted. If the solenoid 1 is electrically disconnected, then the cutter 2 will be lowered by the restoring force of the spring 3 to a position indicated by the broken line in Fig. 7 in which the cutter 2 comes into collision with a cradle 4. As a result, a thread 5 currently being fed from the thread feeding side to the thread winding side is cut between the cutter 2 and the cradle 4.
  • a support member 12 connected to an actuator 11 is raised and lowered by the actuator 11.
  • the blades 15A and 15B of a cutter 14 is driven through link members 13A and 13B.
  • the blades 15A and 15B are rotated in opposite directions about a supporting axis 16.
  • the actuator 11 protrudes and the blades 15A and 15B are opened as shown in Fig. 9, a thread 17 currently being fed is inserted between the blades.
  • the blades 15A and 15B are then closed by the actuator 11, so that the thread 17 is cut by the cutter 14.
  • a thread cutting apparatus such as that shown in Fig. 7 and the thread cutting method have the disadvantage that a thick thread such as a tire cord (e.g., 1000 to 1500 de (denier)) cannot be cut.
  • a tire cord e.g. 1000 to 1500 de (denier)
  • a thread cutting apparatus such as that shown in Fig. 9 and the thread cutting method also have the disadvantage that it is difficult to cut a thick thread with the cutter 14 and that the cutter 14 itself is pulled to the thread winding side by the thread 17 currently being fed.
  • the apparatus of Fig. 7 is constructed such that the cutter 2 is raised and lowered by the solenoid 1 and the spring 3 and the apparatus of Fig. 9 is constructed such that the cutter 14 is opened and closed by the actuator 11 and the link members 13A and 13B, there was the drawback that the number of the components is increased.
  • the cutting apparatus of this kind is provided every spindle of each winder, so there was the drawback that the cost of production is increased.
  • an object of the present invention to provide a thread cutting method which is capable of cutting a thread surely and cutting even a thick thread.
  • a method of cutting a thread comprising the steps of preparing a cutter having a pair of blades which define a generally V-shaped blade edge having end portions and a valley portion remote from the end portions, disposing the cutter so that the valley portion of the V-shaped blade edge is positioned in the downstream side of a thread feeding path than the end portions of the V-shaped blade edge and inclining the cutter at a predetermined angle, feeding the thread along the thread feeding path that is disposed between the pair of blades, guiding the thread to the valley portion of the V-shaped blade edge by bringing the thread and the cutter into close relationship, during feeding of the thread, and cutting the guided thread with a tension of the thread in the downstream side of the cutter.
  • the predetermined angle is an acute angle defined by the thread guided to the valley portion and the cutter.
  • the cutter is inclined so that the valley portion of the V-shaped blade edge is positioned in the downstream side of a thread feeding path than the end portions of the V-shaped blade edge. Therefore, if the thread currently being fed is guided to the valley portion of the V-shaped blade edge, it is automatically locked to the valley portion of the V-shaped blade edge. If in this condition the thread is slightly pulled to the downstream side, then it will be cut instantaneously. Thus, the thread can be cut surely with the tension of the thread in the downstream side of the cutter. As a result, since a complicated operation of the cutter is not needed, the thread cutting apparatus is made structurally simple and also the cost of production can be reduced.
  • an apparatus for cutting a thread comprising a cutter having a pair of blades which define a generally V-shaped blade edge having end portions and a valley portion remote from the end.portions, the cutter being disposed at a predetermined angle so that the valley portion of the V-shaped blade edge is positioned in the downstream side of a thread feeding path than the end portions of the V-shaped blade edge, feeding means for feeding the thread along the thread feeding path that is disposed between the pair of blades, guiding means for guiding the thread to the valley portion of the V-shaped blade edge by bringing the thread and the cutter into close relationship, and cutting means for cutting the thread guided to the valley portion of the V-shaped blade edge.
  • the predetermined angle is an acute angle defined by the thread guided to the valley portion and the cutter.
  • the cutting means may comprise a tension of the thread in the downstream side of the cutter.
  • the generally V-shaped blade edge may have an acute angle of between 15 degrees and 60 degrees.
  • the predetermined angle is between 15 degrees and 60 degrees. In that case, the thread is easily guided to the valley portion of the V-shaped blade edge of the cutter. As a result, a reliable cutting operation can be achieved.
  • FIGs. 1-6 there is shown a preferred embodiment of a thread cutting apparatus in accordance with the present invention.
  • a thread 21 is supplied from a thread supplying apparatus (not shown) and fed in a direction Xalong a thread feeding path P 1 .
  • the thread 21 is wound on a bobbin 24 by rotation of a friction roller 23 of a winder 22.
  • a thread guiding unit 25 and a cutter 30 are provided between the thread supplying apparatus and the winder 22, there are provided a thread guiding unit 25 and a cutter 30.
  • the thread guiding unit 25 as shown in Fig. 3, comprises a thread guide bar 26 extending at right angles with respect to the thread feeding path P 1 and an actuator 28 supported on an apparatus frame 27.
  • the thread guide bar 26 is moved upward and downward by the actuator 28.
  • the thread 21 is displaced between the thread feeding path P 1 and a thread cutting path P 2 .
  • the thread guiding unit 25 constitutes guiding means for guiding the thread 21 so that it is contacted with a generally V-shaped blade edge 33 of the cutter 30.
  • the cutter 30 has a pair of blades 31A and 31 B which form the generally V-shaped cutting edge 33.
  • the aforementioned thread feeding path P 1 is located between the blades 31 A and 31 B.
  • These blades 31 A and 31 B are fixedly mounted on a cutter mounting surface 27a of the apparatus frame 27 by a fixing pin 32, and as shown in Fig. 4, the blade edge lines f1 and f2 define an acute angle 8 1 of the V-shaped blade edge 33.
  • the blade edge angle 8 1 of the V-shaped blade edge 33 is between 15 degrees and 60 degrees, for example.
  • the V-shaped blade edge 33 has a valley portion 33a which is positioned slightly above the thread cutting path P 2 , so that when the thread 21 is displaced to the thread cutting path P 2 , it is brought into contact with the V-shaped blade edge 33.
  • the cutter 30 is inclined with respect to the paths P 1 and P 2 so that the valley portion 33a of the V-shaped blade edge 33 is disposed in the downstream side of the thread feeding direction X than the upper ends of the V-shaped blade edge 33.
  • the cutter 30 When the thread 21 is displaced to the thread cutting path P 2 and contacted with the valley portion 33a of the V-shaped blade edge 33, the cutter 30 is disposed at an angle of inclination such that an acute angle 0 2 defined by this thread 21 (thread 21 contacted with the valley portion 33a of the cutter 30) and a plane containing the blade edge lines f1 and f2 of the cutter 30 is, for example, between 15 degrees and 60 degrees.
  • This angle of inclination is an angle of inclination from the conventional cutter shown in Fig. 7 or 9 that crosses with a thread in the upstream side of the cutter, and in the embodiment of the present invention the aforementioned acute angle 0 2 will hereinafter be referred to as an acute angle corresponding to the angle of inclination of the cutter 30.
  • the blades 31Aand 31B of the cutter 30 are single-edged blades as shown in Fig. 5, it is noted that they may also be double-edged blades such as those shown in Fig. 6.
  • the aforementioned fixing pin 32 is a fixing member such as a bolt, and the angle of the blades 31 A and 31 B with respect to the mounting surface 27a and the acute angle between the blades can he adjusted by fastening and unfastening the fixing pin 32.
  • the cutter 30 is first disposed in a predetermined position in which the thread feeding path P 1 is between the V-shaped blade edge 33 of the cutter 30.
  • the cutter 30 is also inclined so that the valley portion 33a of the V-shaped blade edge 33 is positioned in the downstream side of the thread feeding direction X than the upper ends of the V-shaped blade edge 33.
  • the thread 21 is positioned along and on the thread feeding path P 1 .
  • the thread 21 is then fed along the thread feeding path P 1 and also the winder 22 starts winding the thread 21 on the bobbin 24. If a nearly requisite amount of the thread 21 is wound on one bobbin 24, then an operation for switching to the next empty bobbin will be started.
  • the thread 21 is first displaced from the thread feeding path P, to the thread cutting path P 2 by the tread guiding unit 25. Upon this downward movement of the thread 21, it is guided within the V-shaped blade edge 33 of the cutter 30. At this time, with the tension of the thread 21 in the downstream side of the thread feeding direction X that is exerted from the winder 22, the thread 21 is brought into contact with the V-shaped blade edge 33 and also automatically locked to the valley portion 33a of the V-shaped blade edge 33. If in this condition the thread 21 is slightly pulled to the downstream side, then it will be cut instantaneously.
  • the cutter 30 by including the cutter 30 so that the valley portion 33a of the V-shaped blade edge 33 of the cutter 30 is positioned in the downstream side of the thread feeding direction X than the upper ends of the V-shaped blade edge 33 and also by guiding the thread 21 to the valley portion 33a of the V-shaped blade edge 33, the thread 21 can be cut surely with the tension of the thread 21 exerted from the winder 22.
  • the thread cutting apparatus since a complicated operation of the cutter 30 is not needed, the thread cutting apparatus is made structurally simple and also the cost of production can be reduced. Particularly, in a system in which a great number of such winders and cutting apparatuses are disposed in parallel, the cost of installation can be greatly reduced.
  • a thread of thread thickness 1500 de (denier) was cut with a NT cutter (trade name "ORUFA CUTTER", type 227J04070 (double-edge blade)).
  • the thread cutting was satisfactory when the acute angle 0 2 corresponding to the angle of inclination of the cutter 30 is between 15 degrees and 60 degrees.
  • the cutting conditions are as follows.
  • the tension of the thread in the upstream side of the cutter 30, T 1 is 20 gr.
  • the acute angle 8 1 of the V-shaped blade edge 33 is 40 degrees, and an angle 0 3 corresponding to a depth of cut (depth between 33a and P 2 ) is 15 degrees.
  • the same thread as that of the first experimental example was cut with the same NT cutter as that of the first experimental example.
  • the acute angle 8 1 of the V-shaped blade edge 33 is between 15 degrees and 60 degrees, the thread cutting was satisfactory.
  • the cutting conditions are as follows.
  • the tension of the thread in the upstream side of the cutter 30, T 1 is 20 gr.
  • the acute angle 0 2 corresponding to the angle of inclination of the cutter 30 is 40 degrees, and the angle 0 3 corresponding to a depth of cut (depth between 33a and P 2 ) is 15 degrees.
  • the lower limit value (15 degrees) of the acute angle 8 1 of the V-shaped blade edge 33 or lower limit value (15 degrees) of the acute angle 0 2 corresponding to the angle of inclination of the cutter 30 is a lower limit value of a practical range, and thread cutting is also possible at a value less than this lower limit value.
  • a reliable thread cutting operation can be performed in accordance with the present invention by using the cutter 30 in which the acute angle 8 1 of the V-shaped blade edge 33 is between 15 degrees and 60 degrees and also by disposing the cutter 30 at the angle of inclination 0 2 between 15 degrees and 60 degrees.
  • the blades 31A and 31 B of the cutter 30 have been symmetrically positioned, they may also be asymmetrically positioned so that one blade is close to the thread feeding path P 1 . In this case, when the thread 21 is cut, it can be guided positively to the valley portion 33a of the V-shaped blade edge 33 of the cutter 30.
  • the blades 31A and 31B have a straight blade edge, they can also have a suitably curved blade edge, Further, although in the aforementioned embodiment the thread has been moved toward the cutter so that the thread is guided to the valley portion of the cutter, it is noted that the cutter may also be moved to the thread.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Coiling Of Filamentary Materials In General (AREA)
  • Knives (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP92311345A 1991-12-17 1992-12-11 Thread cutting method and apparatus Withdrawn EP0547845A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP333245/91 1991-12-17
JP3333245A JPH05163622A (ja) 1991-12-17 1991-12-17 糸の切断方法および切断装置

Publications (1)

Publication Number Publication Date
EP0547845A1 true EP0547845A1 (en) 1993-06-23

Family

ID=18263951

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92311345A Withdrawn EP0547845A1 (en) 1991-12-17 1992-12-11 Thread cutting method and apparatus

Country Status (4)

Country Link
EP (1) EP0547845A1 (ja)
JP (1) JPH05163622A (ja)
KR (1) KR930013273A (ja)
TW (1) TW213962B (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003102283A1 (de) * 2002-05-31 2003-12-11 Picanol N.V. Vorrichtung und verfahren zum trennen eines fadens
CN102304846A (zh) * 2011-08-31 2012-01-04 卡尔迈耶（中国）有限公司 手动切纱装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6461705B2 (ja) * 2014-05-29 2019-01-30 Ｔｍｔマシナリー株式会社 糸切断装置
CN109385880B (zh) * 2018-10-16 2021-04-20 宜城市天舒纺织有限公司 一种纺织用导纱切割装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1166402A (fr) * 1950-11-07 1958-11-12 Algemene Kunstzijde Unie Nv Dispositif pour sectionner des fils, filés, cordes et produits similaires en mouvement
FR1271149A (fr) * 1960-07-26 1961-09-08 Electronique Textile S A R L L Dispositif de coupe de fils défilant rapidement
US3023656A (en) * 1958-10-20 1962-03-06 J F Scholten And Zonen N V Cutting device
GB913320A (en) * 1960-04-23 1962-12-19 Glanzstoff Courtaulds Gmbh Improvements relating to thread-cutting devices
DE1922241A1 (de) * 1968-04-30 1969-11-06 Leesona Corp Vorrichtung zum Durchtrennen eines Garnfadens
FR2528077A1 (fr) * 1982-06-04 1983-12-09 Izba Welny Procede de casse d'une meche sur un metier a filer et dispositif de casse d'une meche sur un metier a filer
EP0404045A1 (de) * 1989-06-19 1990-12-27 Barmag Ag Verfahren zum Spulenwechsel der Aufwickelspulen einer Textilmaschine sowie eine Textilmaschine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1166402A (fr) * 1950-11-07 1958-11-12 Algemene Kunstzijde Unie Nv Dispositif pour sectionner des fils, filés, cordes et produits similaires en mouvement
US3023656A (en) * 1958-10-20 1962-03-06 J F Scholten And Zonen N V Cutting device
GB913320A (en) * 1960-04-23 1962-12-19 Glanzstoff Courtaulds Gmbh Improvements relating to thread-cutting devices
FR1271149A (fr) * 1960-07-26 1961-09-08 Electronique Textile S A R L L Dispositif de coupe de fils défilant rapidement
DE1922241A1 (de) * 1968-04-30 1969-11-06 Leesona Corp Vorrichtung zum Durchtrennen eines Garnfadens
FR2528077A1 (fr) * 1982-06-04 1983-12-09 Izba Welny Procede de casse d'une meche sur un metier a filer et dispositif de casse d'une meche sur un metier a filer
EP0404045A1 (de) * 1989-06-19 1990-12-27 Barmag Ag Verfahren zum Spulenwechsel der Aufwickelspulen einer Textilmaschine sowie eine Textilmaschine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003102283A1 (de) * 2002-05-31 2003-12-11 Picanol N.V. Vorrichtung und verfahren zum trennen eines fadens
BE1014859A3 (nl) * 2002-05-31 2004-05-04 Picanol Nv Inrichting en werkwijze voor het knippen van een draad.
CN102304846A (zh) * 2011-08-31 2012-01-04 卡尔迈耶（中国）有限公司 手动切纱装置
CN102304846B (zh) * 2011-08-31 2014-07-02 卡尔迈耶（中国）有限公司 手动切纱装置

Also Published As

Publication number Publication date
KR930013273A (ko) 1993-07-21
JPH05163622A (ja) 1993-06-29
TW213962B (ja) 1993-10-01

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