EP0356380A1 - Procédé pour éviter les pics de contrainte dans la trame lors de son introduction au moment du freinage - Google Patents

Procédé pour éviter les pics de contrainte dans la trame lors de son introduction au moment du freinage Download PDF

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Publication number
EP0356380A1
EP0356380A1 EP89810527A EP89810527A EP0356380A1 EP 0356380 A1 EP0356380 A1 EP 0356380A1 EP 89810527 A EP89810527 A EP 89810527A EP 89810527 A EP89810527 A EP 89810527A EP 0356380 A1 EP0356380 A1 EP 0356380A1
Authority
EP
European Patent Office
Prior art keywords
deflection
weft
weft thread
thread
damping device
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.)
Granted
Application number
EP89810527A
Other languages
German (de)
English (en)
Other versions
EP0356380B1 (fr
Inventor
Peter Grimm
Manfred Willam
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.)
Itema Switzerland Ltd
Original Assignee
Sulzer AG
Sultex AG
Gebrueder Sulzer AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4250116&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0356380(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sulzer AG, Sultex AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Publication of EP0356380A1 publication Critical patent/EP0356380A1/fr
Application granted granted Critical
Publication of EP0356380B1 publication Critical patent/EP0356380B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/20—Co-operating surfaces mounted for relative movement
    • B65H59/26—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path
    • 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 invention relates to a method for the operation of a weaving machine to avoid tension peaks of a weft thread during the weft insertion during the braking process, in particular during the insertion in air jet looms.
  • thread breaks often occur towards the end of the weft insertion.
  • shot errors known as "stop shots”
  • stop shots usually take place at the moment when the full shot length has been entered and a thread stopper is activated.
  • the course of the thread is often braked abruptly, so that the entire kinetic energy of the weft thread is converted into tension energy of the yarn. Depending on the yarn quality, this results in more or fewer thread breaks.
  • Thread brakes and / or thread tensioners are known in weaving machines.
  • the weft thread is clamped more or less slowly between two mutually movable elements.
  • voltage peaks can occur if the braking is relatively abrupt, so that the thread breaks occur.
  • the known thread tensioners in turn serve the Keep weft stretched or easy to brake. They cannot help prevent thread breaks.
  • the present invention has for its object to develop a method of the type mentioned above, in which tension peaks of the weft thread are avoided, so that the risk of thread breaks is minimized or excluded.
  • the weft thread is steered out of its path towards the end of the weft insertion when braking by a damping device and tension peaks in the thread are damped at the same time by at least partially reversing the deflection.
  • the weft thread can be deflected from its normal path during the entire weft insertion. Due to the multiple deflection of the weft thread, disadvantageous effects occur here due to the friction of the weft thread at the deflections. Therefore, in a preferred embodiment of the invention, the weft thread should only be deflected from its path towards the end of the weft insertion. This minimizes the influence of the weft thread.
  • a separate arrangement of a thread brake and the damping device according to the invention is also possible.
  • the coupling of both functions lies in one device. In this case, the weft thread is first braked in a predetermined deflected position by the damping device, then the deflection is reduced, so that excessive tension peaks are avoided.
  • the start, duration and / or size of the deflection for braking and the reduction of the deflection during damping can preferably be set or adjusted. be managed. This regulation can take place, for example, on the basis of a measured thread speed.
  • a damping device which can be used in the implementation of the above-mentioned method, can consist of an energy store and an apex deflection that is operatively connected to it for engaging in the weft thread run.
  • a spiral or leaf spring or a corresponding spring assembly can be used as the energy store.
  • it can have the disadvantage that the weft thread is always deflected. This constant intervention in the weft insertion can result in a deterioration in the fabric quality.
  • Another form of damping device works according to the plunger magnet principle.
  • An anchor is guided into the weft path at the end of the weft insertion by electromagnets and deflects the weft thread.
  • the voltage applied to the electromagnets is set in such a way that the electromagnetic force is overcome by the weft thread during voltage peaks and the armature can be moved in the direction of its starting position.
  • a higher voltage can also be initially applied when the braking process is initiated, which is then reduced to effect damping.
  • a particularly preferred embodiment of the invention works with a damping device from a pneumatically actuated piston-cylinder system.
  • a crown deflection is connected to the piston, for example via a piston rod.
  • the crown deflection is introduced very quickly into the weft thread path by filling a working chamber of this piston-cylinder system, while on the other hand the counterforce can be controlled sensitively by means of corresponding magnetic valves.
  • the damping device can also be used very well as a thread brake at the same time.
  • an elastic stop is assigned to the crown deflection. In the end position of the crown deflection, it meets this elastic stop with the weft thread, so that between Vertex deflection and elastic stop of the weft thread is trapped. If the air pressure in the cylinder is also reduced at this moment, the peak deflection can be reduced against the pressure of the air volume present in the cylinder space in the event of a voltage peak, the piston-cylinder system acting as damping.
  • a weft thread 1 is moved from a stationary one outside of the one by warp threads 2 formed shed 3 deducted remaining spool 4. It first arrives at a drum store 5 shown in FIG. 2, then through a thread brake 6 and from here into a main entry nozzle 7.
  • the weft thread 1 is blown past a pair of scissors 8 into the shed 3 with a weaving width W via this main entry nozzle 7.
  • the path of the weft thread 1 in the shed 3 is accompanied by relay nozzles 9, which are connected via solenoid valves 10 to a storage tube 11 for compressed air.
  • the tip of the weft thread 1 After the tip of the weft thread 1 emerges from the shed 3, it arrives in a funnel 12 of a suction device 13 and is cut off, the respective thread end being inserted into the edge region of the weaving width by insertion devices 14 on both sides.
  • a compressed air line 15 for the connection of the storage tube 11 to a compressed air unit 16 can also be seen on the side.
  • the side walls of the air-jet weaving machine R are identified by 17 and a goods tree by 18.
  • FIG. 2 it can be seen that the main inlet nozzle 7 is preceded by a damping device 20 according to the invention.
  • This damping device essentially consists of an energy accumulator 21, via which the weft thread 1 is deflected from its linear path. This deflection takes place, inter alia, by means of deflection 22 arranged on each side of the energy accumulator 21, while the energy accumulator 21 engages the weft thread 1 approximately centrally between the two deflections 22 with an apex deflection 23.
  • FIG. 3 A possible variation of the method according to the invention is shown in FIG. 3, with both the deflections 22 and the vertex deflection 23 being designed so that they can be moved with respect to the path of the weft thread 1.
  • the arrangement of the energy store 21, deflections 22 and vertex deflection 23 is shown as it is during the course of the weft thread insertion.
  • the deflections 22 are moved downward in the direction of the arrow y, so that the weft thread 1 is deflected out of its path and deflected via the crown deflection 23.
  • the energy accumulator 21 is designed in such a way that, with a delay, it yields to the force exerted by the deflection of the weft thread 1 on the crown deflection 23, as indicated in FIG. 3, right image. The yielding can take place to such an extent that the weft thread 1 approximates its straight path again.
  • the deflections 2 can be stationary, while the energy store 21 is constructed in such a way that the crown deflection 23 is extended towards the end of the weft thread entry and deflects this weft thread 1 out of its path. Thereafter, the force inherent in the energy accumulator 21 is reduced, so that, according to this reduction by the pulling of the weft thread 1, the crown deflection 23 returns to the starting position.
  • this damping device 20a consists of a compression spring 24, a plate 25 or the like being seated on the compression spring 24 for thread protection. Furthermore, a thread guide is indicated at 26, the thread can be between two guides 26a and 26b are directed.
  • this damping device 20a has a sufficiently high intrinsic frequency to return to the starting position in good time after the deflection has taken place. It is a very simple means of reducing the thread tension peaks somewhat, although under the tension of the compression spring 24, deterioration in the fabric quality may occur due to the constant deflection of the weft thread 1 during the insertion of the weft thread. Because of this disadvantage, a controlled or, even better, a regulated damping device is preferred which only engages with the weft thread 1 in the time actually required.
  • the compression spring was replaced by a light plunger magnet.
  • the corresponding electromagnets 27 are arranged in a stationary manner, while the armature 28 can move in the direction of the arrow.
  • the anchor When using the electromagnet, the anchor can be brought into the thread path under electromagnetic control, where it then acts as a combined "brake-damper" element. In order to avoid vibrations when deflecting, the deflection can take place against a stop, which is described below.
  • the exemplary embodiment of a damping device 20c according to FIG. 7 works according to the similar principle.
  • the apex deflection 23 is moved in the arrow direction shown there by means of a pneumatically actuated piston-cylinder system 29.
  • This piston-cylinder system 29 is connected via a compressed air connection 30 to a corresponding compressed air source, not shown in detail.
  • the intervention through the deflections 22 takes place, for example, so quickly by a linear motor that the compression spring 24 is not compressed too early, but only when a thread tension peak occurs. This can then be reduced more, since a higher damping effect is achieved by the low spring constant of the compression spring 24 and the deflection path of the weft thread 1 which is still fully preserved.
  • the exemplary embodiment of a damping device 20d according to FIG. 6 again corresponds more closely to that according to FIG. 4.
  • the Weft thread 1 deflected by a leaf spring 31.
  • this leaf spring 31 is pushed back.
  • the leaf spring 31 is, however, acted upon by an air flow from a compressed air connection 32, which more or less supports the spring action of the leaf spring 31, as a result of which the braking and damping effect is temporally dependent on the air pressure is changeable.
  • FIG. 8 also shows an elastic stop 33 against which the apex deflection 23 presses in the extended state.
  • the weft thread 1 is clamped in, so that the braking effect can be increased.
  • the elastic stop 33 also serves to avoid bouncing in the end position when using the damping device 20d according to the plunger magnet principle.
  • All deflections 22 and 23 should be made of a material with a low friction factor, for example sapphire glass or the like.
  • FIG. 9 again shows a simple exemplary embodiment of a damping device 20e, which corresponds to that according to FIG. 4. However, this is not a compression spring, but a leaf spring with an attached spiral spring.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP89810527A 1988-08-25 1989-07-12 Procédé pour éviter les pics de contrainte dans la trame lors de son introduction au moment du freinage Revoked EP0356380B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3169/88 1988-08-25
CH316988 1988-08-25

Publications (2)

Publication Number Publication Date
EP0356380A1 true EP0356380A1 (fr) 1990-02-28
EP0356380B1 EP0356380B1 (fr) 1994-11-23

Family

ID=4250116

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810527A Revoked EP0356380B1 (fr) 1988-08-25 1989-07-12 Procédé pour éviter les pics de contrainte dans la trame lors de son introduction au moment du freinage

Country Status (4)

Country Link
US (1) US4962796A (fr)
EP (1) EP0356380B1 (fr)
JP (1) JP2992890B2 (fr)
DE (1) DE58908655D1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0467059A1 (fr) * 1990-06-11 1992-01-22 NUOVA VAMATEX S.p.A. Dispositif de régulation de la tension de la trame et de rappel de celle-ci sur des machines à tisser
WO1993006279A2 (fr) * 1991-09-23 1993-04-01 Iro Ab Metier mecanique et frein d'insertion pour metiers mecaniques
WO1993006278A2 (fr) * 1991-09-23 1993-04-01 Iro Ab Procede et metier mecanique
EP0659919A1 (fr) * 1993-12-22 1995-06-28 Picanol N.V. Frein de fil de trame pour un métier à tisser
WO1998005812A1 (fr) * 1996-07-31 1998-02-12 Nuova Roj Electrotex S.R.L. Procede de commande de l'insertion du fil de trame dans un metier
EP0826806A1 (fr) * 1996-09-03 1998-03-04 L.G.L. Electronics S.p.A. Frein de fil de trame plus particulièrement pour métiers à jet d'air
WO2000044970A1 (fr) * 1999-01-29 2000-08-03 Te Strake B.V. Metier a frein d'insertion
WO2003038170A1 (fr) * 2001-10-29 2003-05-08 Picanol N.V., Naamloze Vennootschap Procede et dispositif permettant d'alimenter une machine a tisser en fil de trame, et mecanisme de freinage et/ou d'amortissement applique audit dispositif
WO2021078791A1 (fr) * 2019-10-21 2021-04-29 Maschinenfabrik Rieter Ag Procédé d'entraînement d'élément mécanique comprenant un élément de saisie de fil sur une machine textile, dispositif permettant de déplacer un fil sur une machine textile, et machine textile

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4008058A1 (de) * 1990-03-14 1991-09-19 Stoll & Co H Einfaedel- und fadenwechselvorrichtung fuer fadenfuehrer
EP0475892B1 (fr) * 1990-09-10 1995-05-17 Sulzer RàœTi Ag Frein de fil pour métiers à tisser
JP2955145B2 (ja) * 1992-09-08 1999-10-04 東レ株式会社 扁平糸織物とその製造方法および製造装置
BE1009297A3 (fr) * 1993-04-16 1997-02-04 Nissan Texsys Co Ltd Systeme d'insertion de trame pour metier a jet de fluide.
SE503620C2 (sv) * 1994-02-14 1996-07-22 Aplicator System Ab Trådmatningsbuffert för matning av tråd
RU2203847C2 (ru) * 1998-03-03 2003-05-10 Апликатор Систем АБ Устройство защиты от запутывания для буфера подачи нити
US7543610B2 (en) * 2006-06-16 2009-06-09 Sultex Ag Thread clamp for a rapier head
DE10261774A1 (de) * 2002-12-20 2004-07-01 Picanol N.V. Vorrichtung und Verfahren zum Strecken
BE1016183A3 (nl) * 2004-09-08 2006-04-04 Picanol Nv Werkwijze en inrichting voor het klemmen van een inslagdraad bij een weefmachine.
DE502006003985D1 (de) * 2006-01-24 2009-07-30 Sultex Ag Gesteuerte Fadenbremse
DE502008001238D1 (de) * 2007-09-10 2010-10-14 Itema Switzerland Ltd Schneidvorrichtung für eine Webmaschine und Verfahren zum Betrieb derselben

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH251626A (de) * 1944-12-09 1947-11-15 Sulzer Ag Verfahren zur Regelung der Spannung des Schussfadens bei Greiferwebstühlen.
CH623865A5 (en) * 1978-08-09 1981-06-30 Moessinger Sa Method for adjusting the speed of a yarn inserted in the shape of a loop
EP0090878A1 (fr) * 1982-04-07 1983-10-12 GebràœDer Sulzer Aktiengesellschaft Dispositif de tension de la trame pour métiers à tisser, plus particulièrement pour les métiers à projectiles
EP0155432A1 (fr) * 1984-03-23 1985-09-25 GebràœDer Sulzer Aktiengesellschaft Machine à tisser
EP0155431A1 (fr) * 1984-03-07 1985-09-25 Maschinenfabrik Sulzer-Rüti Ag Procédé d'insertion de fil de trame pour un métier à tisser et métier à tisser pour réaliser ce procédé
CH657388A5 (en) * 1983-03-22 1986-08-29 Textilma Ag Ribbon loom
EP0268550A1 (fr) * 1986-10-20 1988-05-25 GebràœDer Sulzer Aktiengesellschaft Tendeur de fils pour machine textile

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH453244A (de) * 1966-03-15 1968-06-14 Sulzer Ag Webverfahren und Webmaschine zur Durchführung des Verfahrens
NL7511117A (en) * 1975-09-19 1977-03-22 Picanol Nv Double acting yarn brake for weft in shuttleless looms - responds quickly to variations in tension, minimising irregularities
CH646397A5 (de) * 1979-01-18 1984-11-30 Bonas Machine Co Fadenzufuehrvorrichtung zum intermittierenden zufuehren von fadenmaterial unter spannung.
NL8203808A (nl) * 1982-09-30 1984-04-16 Rueti Te Strake Bv Werkwijze voor het met behulp van een stromend medium transporteren van een inslagdraad door het weefvak bij een spoelloze weefmachine, alsmede weefmachine, ingericht voor het toepassen van deze werkwijze.
DE3446567C1 (de) * 1984-12-20 1986-05-07 Lindauer Dornier Gmbh, 8990 Lindau Schussfadenbremse mit stufenweise steuerbarer Bremswirkung
IT1188625B (it) * 1986-03-25 1988-01-20 Roy Electrotex Spa Dispositivo smorzatore delle oscillazioni e vibrazioni dei fili di trama in dispositivo alimentatori della trama per telai ad aria
DE3637919A1 (de) * 1986-11-06 1988-05-19 Dornier Gmbh Lindauer Schussfadenbremse mit steuerbarer bremswirkung fuer schuetzenlose webmaschinen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH251626A (de) * 1944-12-09 1947-11-15 Sulzer Ag Verfahren zur Regelung der Spannung des Schussfadens bei Greiferwebstühlen.
CH623865A5 (en) * 1978-08-09 1981-06-30 Moessinger Sa Method for adjusting the speed of a yarn inserted in the shape of a loop
EP0090878A1 (fr) * 1982-04-07 1983-10-12 GebràœDer Sulzer Aktiengesellschaft Dispositif de tension de la trame pour métiers à tisser, plus particulièrement pour les métiers à projectiles
CH657388A5 (en) * 1983-03-22 1986-08-29 Textilma Ag Ribbon loom
EP0155431A1 (fr) * 1984-03-07 1985-09-25 Maschinenfabrik Sulzer-Rüti Ag Procédé d'insertion de fil de trame pour un métier à tisser et métier à tisser pour réaliser ce procédé
EP0155432A1 (fr) * 1984-03-23 1985-09-25 GebràœDer Sulzer Aktiengesellschaft Machine à tisser
EP0268550A1 (fr) * 1986-10-20 1988-05-25 GebràœDer Sulzer Aktiengesellschaft Tendeur de fils pour machine textile

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0467059A1 (fr) * 1990-06-11 1992-01-22 NUOVA VAMATEX S.p.A. Dispositif de régulation de la tension de la trame et de rappel de celle-ci sur des machines à tisser
US5462094A (en) * 1991-09-23 1995-10-31 Iro Ab Sensor activated weft tension device
WO1993006279A2 (fr) * 1991-09-23 1993-04-01 Iro Ab Metier mecanique et frein d'insertion pour metiers mecaniques
WO1993006278A2 (fr) * 1991-09-23 1993-04-01 Iro Ab Procede et metier mecanique
WO1993006278A3 (fr) * 1991-09-23 1993-05-13 Iro Ab Procede et metier mecanique
WO1993006279A3 (fr) * 1991-09-23 1993-05-13 Iro Ab Metier mecanique et frein d'insertion pour metiers mecaniques
US5417251A (en) * 1991-09-23 1995-05-23 Iro Ab Programmable weft insertion brake for looms
US5544680A (en) * 1993-12-22 1996-08-13 Picanol N.V. Weft thread brake with rotary drive
EP0659919A1 (fr) * 1993-12-22 1995-06-28 Picanol N.V. Frein de fil de trame pour un métier à tisser
WO1998005812A1 (fr) * 1996-07-31 1998-02-12 Nuova Roj Electrotex S.R.L. Procede de commande de l'insertion du fil de trame dans un metier
US6105627A (en) * 1996-07-31 2000-08-22 Nuova Roj Electrotex S.R.L. Method to control weft yarn insertion in a loom
CN1084810C (zh) * 1996-07-31 2002-05-15 诺瓦·罗伊电子公司 织机中控制纬纱插入的方法
EP0826806A1 (fr) * 1996-09-03 1998-03-04 L.G.L. Electronics S.p.A. Frein de fil de trame plus particulièrement pour métiers à jet d'air
WO2000044970A1 (fr) * 1999-01-29 2000-08-03 Te Strake B.V. Metier a frein d'insertion
WO2003038170A1 (fr) * 2001-10-29 2003-05-08 Picanol N.V., Naamloze Vennootschap Procede et dispositif permettant d'alimenter une machine a tisser en fil de trame, et mecanisme de freinage et/ou d'amortissement applique audit dispositif
BE1014441A3 (nl) * 2001-10-29 2003-10-07 Picanol Nv Werkwijze en inrichting voor het toevoeren van inslaggaren bij een weefmachine, alsmede rem- en/of dempingsmechanisme hierbij toegepast.
WO2021078791A1 (fr) * 2019-10-21 2021-04-29 Maschinenfabrik Rieter Ag Procédé d'entraînement d'élément mécanique comprenant un élément de saisie de fil sur une machine textile, dispositif permettant de déplacer un fil sur une machine textile, et machine textile
CN114787059A (zh) * 2019-10-21 2022-07-22 里特机械公司 驱动纺织机上包括纱线捕捉器的机械元件的方法、纺织机上移动纱线的装置和纺织机

Also Published As

Publication number Publication date
JPH0299644A (ja) 1990-04-11
US4962796A (en) 1990-10-16
JP2992890B2 (ja) 1999-12-20
DE58908655D1 (de) 1995-01-05
EP0356380B1 (fr) 1994-11-23

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