EP1483436B1 - Pneumatischer fadenstrecker und fadenverarbeitungssystem - Google Patents

Pneumatischer fadenstrecker und fadenverarbeitungssystem Download PDF

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Publication number
EP1483436B1
EP1483436B1 EP02760248A EP02760248A EP1483436B1 EP 1483436 B1 EP1483436 B1 EP 1483436B1 EP 02760248 A EP02760248 A EP 02760248A EP 02760248 A EP02760248 A EP 02760248A EP 1483436 B1 EP1483436 B1 EP 1483436B1
Authority
EP
European Patent Office
Prior art keywords
thread
pneumatic
stretcher
processing system
air current
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.)
Expired - Lifetime
Application number
EP02760248A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1483436A2 (de
Inventor
Pär JOSEFSSON
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.)
Iropa AG
Original Assignee
Iropa 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
Application filed by Iropa AG filed Critical Iropa AG
Publication of EP1483436A2 publication Critical patent/EP1483436A2/de
Application granted granted Critical
Publication of EP1483436B1 publication Critical patent/EP1483436B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • 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
    • B65H59/105—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 the material being subjected to the action of a fluid
    • 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
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/44—Tensioning devices for individual threads
    • 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 pneumatic thread stretchers according to the preamble of claim 1 and a yarn processing system according to the preamble of claim 7.
  • the pneumatic yarn straightener is arranged downstream of a yarn feeding device operating with slippage and upstream of a knitting system of a flat knitting machine so that the air stream emerging from the discharge end of its tubular body is opposite to the yarn running direction.
  • a cylinder is arranged at a considerable distance in front of the discharge end of the tubular body with a cylinder axis oriented transversely to the yarn running direction, the outer circumference of which approximately touches the extension of the axis of the tubular body.
  • the airflow exiting the discharge end along the thread is deflected away from the elongated tube body axis at the outer circumference of the cylinder, forming a stretching loop in the thread.
  • the flow rate and pressure of the airflow are adjustable.
  • the pneumatic thread straightener works continuously. It is also useful in a yarn processing system with a weaving machine.
  • the continuous operation of the pneumatic yarn stretcher not only results in high air consumption due to the air flow spreading laterally on the cylinder, but the yarn can be damaged in its rest phase by the flow dynamics of the air flow.
  • a pneumatic thread stretcher operates with two nozzles operating at an acute angle to each other to stretch a relaxing thread by forming a loop.
  • the invention has for its object to provide a pneumatic thread stretchers of the type mentioned, which is structurally simple and effectively stretches the thread, has relatively low air consumption, and created no danger to the thread. It is another object of the invention to provide a thread processing system with at least one pneumatic thread stretchers, in which the thread stretchers works with relatively low air consumption and does not create a threat to the thread.
  • the air flow deflection surface in the yarn straightener is a transitionless and laterally limited extension of the inner wall of the guide channel, substantially all the energy of the air flow is used to stretch the yarn. Parts of the air flow can not disappear laterally unused before the deflection. The result is a relatively laminar flow, which optimally plays the Coanda effect, in which it adheres to the deflection and pulls the thread from the tube body axis laterally into the loop and thus stretches the thread, if the thread should yield at this time.
  • the lateral boundary of the deflection avoids compressed air losses and acts in the sense of an effective and defined control of the thread in the loop formation.
  • the air consumption is reduced by the conversion of the flow rate or the pressure of the air flow along the deflection between at least two different levels and assignment to the operating cycle of the textile machine, but especially in periods of rest of the thread the risk of thread damage by the flow dynamics of the air flow minimized.
  • the mechanical load on the thread is not critical.
  • the high level is associated with the operating cycle of the textile machine then adjusted, and only temporarily, if an additional stretching effect by the pneumatic thread straightener for proper yarn course control is required.
  • the extension is formed in the manner of a half-pipe, which is bounded on both sides by guide walls, so that the air flow, as soon as it follows the deflection, is cleanly guided, and also the thread is deformed in a controlled manner in the extending loop.
  • the side walls may diverge from the Luftstromablenk Design or converge or even parallel to each other. They should be spaced so far apart that the thread does not contact the sidewalls when the threadline is stretched normally.
  • the extension is formed from an excess length of the tubular body, which is cut open in the longitudinal direction so that the tube walls bend or open outwards and allow the entire excess length to bend away to one side of the tubular body axis.
  • an adjusting member with which the flow rate or the pressure of the air flow generated along the deflecting surface can be changed between at least two different setting values, expediently remotely controlled, so that the thread straightener only produces a significant stretching effect in the thread. if this effect is needed for the threadline control. In phases where no stretching effect is needed, for example in a Ruhrphase of the thread, is worked on the low level at which the air flow is sufficiently weak and no harmful effect on the thread takes.
  • At least one adjusting member with an electric actuator is included in the communication of the yarn stretcher with the compressed air supply, preferably a solenoid valve, to switch between at least two different levels of the flow rate and the pressure.
  • the operation of the yarn stretcher can be controlled in this way depending on the operation cycle of the textile machine.
  • the signals causing the transition between the levels are transmitted via a signal connection, either from a control device of the textile machine or the yarn feeding device, or from a communication system in which the textile machine and / or the yarn feeding device is (are) incorporated.
  • a communication system e.g. a data bus system (CAN or the like.)
  • a control box is often provided, are controlled or monitored from the different functional units.
  • the signals for actuating the actuator of the yarn stretcher may preferably be derived from this central control box, e.g. by means of a message-translating processor.
  • a patterned product is produced with the textile machine, for example in a weaving machine with weft threads of different qualities or colors in several thread channels, or in a knitting machine with several knitting systems, then it is expedient to design the device such that it tilts the thread stretch depending on the pattern between the threads Levels surrounded.
  • the thread stretcher of an activated thread channel can be changed over by the device adapted to the operation cycle of the textile machine in this thread channel between the high and low levels.
  • the high level is set, for example, in each case if it is to be prevented by an additional thread stretch, that at times the thread is too relaxed, or to a component of the textile machine Assisted by increased thread tension, which temporarily requires a stronger train in the thread for proper function.
  • the device may be configured such that the high flow rate or the high pressure in the yarn stretcher is temporarily set during a picking operation when the picking yarn takes over the yarn tip and / or passes the yarn tip to the picker gripper. and / or the entry process is terminated. In the other phases of the entry process, however, the low level is set, because then a significant move in the thread is safely translated.
  • the conversion is made by the device by means of signals representing certain rotation angles or ranges of the main shaft of the rapier loom in the aforementioned phases of operation.
  • a pneumatic thread straightener In a yarn processing system with a Greiferflexenwebmaschine with multiple web pattern dependent alternately activatable thread channels in each thread channel, a pneumatic thread straightener is provided.
  • the device is designed to change the flow rate or the pressure to the low level each time the thread channel is not activated with this thread stretcher and the thread is e.g. paused in a resting phase. This is preferably done by means of signals, e.g. derived from the control of a thread selector, which represent the at least one non-activated thread channel.
  • Optimal results are achieved with the controlled pneumatic thread straightener, when the thread straightener downstream of the yarn feeding device in the yarn path is functionally combined with a stationary yarn brake ring, preferably a soft bristle brake ring which contacts a withdrawal end of a stationary storage drum in the yarn feeding device.
  • the bristle brake ring generates a relatively constant, low base tension in the thread, which superimposes an additional tensile load on the thread straightener, namely at the low level not at all or not significantly, but at the high level significantly.
  • the bristle brake ring also prevents the thread from possibly rising upstream of the loop formed the storage drum can relax, which would disturbed there held thread turns.
  • a yarn processing system S in Fig. 1 includes i.a. a textile machine R, for example a Greiferflexenwebmaschine or a knitting machine, at least one yarn feeding device F, and a pneumatic, controlled yarn stretchers T in the yarn path downstream of the yarn feeding device.
  • a textile machine R for example a Greiferflexenwebmaschine or a knitting machine
  • at least one yarn feeding device F for example a Greiferflexenwebmaschine or a knitting machine
  • a pneumatic, controlled yarn stretchers T in the yarn path downstream of the yarn feeding device.
  • the illustrated on the example of a rapier weaving machine textile machine R has a shed D and drivable Bringer- and slave gripper B, N for entering at least one yarn Y, Y1 from at least one thread channel.
  • the Bringergreifer B takes the thread tip in an entry and thread selector device 2 and pulls the thread to the middle of the shed D, where he passes the thread tip in a region 1 to the gripper rapper N, which then pulls the thread completely through the shed and the Entry finished.
  • the yarn feeding device F has a housing 3 with a stationary storage drum 4, to which the yarn Y is fed by means of a winding element 5 in successive turns.
  • a trigger 7 On a housing boom 6, a trigger 7 is positioned.
  • a thread brake A in the form of a, preferably soft, bristle brake ring 8 is supported on the housing arm 6, which contacts a withdrawal end 9 of the storage drum 4 from the outside and against the withdrawal direction of the thread.
  • the pneumatic thread stretchers T has a housing 10 and extending in the direction of the thread running path tubular body 11, opposite to the thread running direction has a laterally curved bent extension 12.
  • the detailed training of the yarn stretcher T will be explained later with reference to FIGS. 2 and 3.
  • a terminal 13 is provided, which is connected to a pressure supply P for compressed air or connectable.
  • a solenoid valve having an electric actuator M serves to change the flow rate or pressure between at least two different set values.
  • the conversion is made remotely with the device H by signals which come via a signal connection 15 either from a control device C of the yarn feeding device or a control device CU of the textile machine R or a communication system K.
  • a central control box CB can be provided in which the signals for the actuator M are generated from messages in the communication system K (for example a CAN bus system).
  • the high level and the low level are nominally adjustable.
  • the low level is suitably chosen so that the thread is hardly or not at all charged.
  • the high level is adjusted so that the thread undergoes an appropriate tensile load by an air flow and is deflected along the extension 12 from the straight thread path in a lateral loop L and thereby stretched from downstream.
  • the rapier loom it is convenient to temporarily adjust the high flow rate or pressure level, e.g. depending on the tapped angle of rotation of the main shaft of Greiferflexenwebmaschine when the Bringergreifer B takes over the thread tip, and / or as the Bringergreifer B passes the thread tip to the gripper rapier N, and / or finally at the end of the entry process. In between, the thread straightener T operates at the low level.
  • each thread channel is a pneumatic thread stretchers B assigned.
  • the device H which is responsible for the control of the thread stretchers T, is designed to set the thread stretcher of a non-activated thread channel to the low flow rate or pressure level.
  • the device H can be assigned to all yarn stretchers together, or it is provided for each yarn stretchers a corresponding device H.
  • a knitting machine is equipped in its thread channels with pneumatic Fadenrangem T of the type shown here, and means H is provided, with which the thread stretchers are controlled in dependence on the cycle of operation of the knitting machine between different Strömungsraten- and pressure levels.
  • the straight tube body 11 defines an air flow and yarn guide channel 20.
  • the air flow is generated by means of a nozzle device, not shown in detail, from the connection 13 counter to the thread running direction.
  • the extension 12 forms a laterally convexly bent away from the imaginary extension of the tubular body axis air flow deflection surface 19, which is bounded on both sides by guide walls 17.
  • This training is manufacturing technology, for example, simply realized in that the tubular body 11 is made with an extension 12 corresponding to the excess length and then the excess length is cut up to a neck 16 along. Then, the tube walls are bent apart to the guide walls 17 and the extension 12 is brought into the curved shape.
  • the inner edges of the guide walls 17 may have inside phases 18 or be rounded so as not to be dangerous to the thread.
  • the guide walls 17 of the basic train U-shaped extension 12 can diverge from the deflection 19 or converge or even run parallel.
  • the thread tensioner T works with the so-called Coanda effect. This means that the relatively laminar air flow directed along the guide channel 20 adheres to the deflecting surface 19 and follows it, thereby deforming and stretching the thread (as indicated in FIG. 1) into the loop L if the thread is currently under low residual stress , In Fig. 3 it is indicated that the distance between the guide walls 17 gradually widened.
  • tubular body 11 with its extension 12 could also be a plastic molding, e.g. an injection molded part.
  • the Strömungsraten- and Druckeinstellglied 14 shown in Fig. 1 is suitably a fast responding pneumatic solenoid valve.
  • the nozzle device in the housing 10 is expediently a so-called ejector nozzle, which in FIGS. 1 and 2 directs the flow of air to the left, while also being able to suck in air from the right end of the housing 10.
  • the thread running monitoring or controlling means may be provided, as is conventional gripper looms conventional standard.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Knitting Machines (AREA)
EP02760248A 2002-03-12 2002-07-17 Pneumatischer fadenstrecker und fadenverarbeitungssystem Expired - Lifetime EP1483436B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0200745A SE0200745D0 (sv) 2002-03-12 2002-03-12 Pneumatischer Fadenstrecker und Fadenverarbeitungssystem
SE0200745 2002-03-12
PCT/EP2002/007971 WO2003076704A2 (de) 2002-03-12 2002-07-17 Pneumatischer fadenstrecker und fadenverarbeitungssystem

Publications (2)

Publication Number Publication Date
EP1483436A2 EP1483436A2 (de) 2004-12-08
EP1483436B1 true EP1483436B1 (de) 2006-09-06

Family

ID=20287239

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02760248A Expired - Lifetime EP1483436B1 (de) 2002-03-12 2002-07-17 Pneumatischer fadenstrecker und fadenverarbeitungssystem

Country Status (9)

Country Link
US (1) US7275291B2 (ko)
EP (1) EP1483436B1 (ko)
JP (1) JP2005527707A (ko)
KR (1) KR100636075B1 (ko)
CN (1) CN100554544C (ko)
AU (1) AU2002325887A1 (ko)
DE (1) DE50208092D1 (ko)
SE (1) SE0200745D0 (ko)
WO (1) WO2003076704A2 (ko)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7543610B2 (en) * 2006-06-16 2009-06-09 Sultex Ag Thread clamp for a rapier head
SG176475A1 (en) * 2006-11-09 2011-12-29 Kulicke & Soffa Ind Inc Wire feed system for a wire bonding machine and configured to apply a variable tension to the wire; method of operating the same
EP2128318A1 (en) 2008-05-30 2009-12-02 Iro Ab Take-up device
DE102010044127B3 (de) * 2010-11-18 2011-12-29 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Greiferkopf zum Eintrag von Schussfäden an einer Greiferwebmaschine sowie eine Greiferwebmaschine mit einem derartigen Greiferkopf
CN103866475A (zh) * 2014-02-24 2014-06-18 江苏宋和宋智能科技有限公司 一种气梭织机及使用方法
GB2545218A (en) * 2015-12-09 2017-06-14 Griffith Textile Mach Ltd Improvements in or relating to weaving looms
WO2017157871A1 (de) * 2016-03-14 2017-09-21 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Textilmaschine mit gleichmässiger fadenspannung
CN106381601B (zh) * 2016-12-02 2018-03-09 佛山慈慧通达科技有限公司 一种新型三维织物织机多剑杆引纬设备及其织造方法
DE102018133147A1 (de) * 2018-12-20 2020-06-25 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Fadenführer mit integrierter Luftströmungsdüse

Family Cites Families (17)

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US2302790A (en) * 1937-11-05 1942-11-24 Owens Corning Fiberglass Corp Method of and apparatus for producing glass yarn
US2333267A (en) * 1939-03-03 1943-11-02 Owens Corning Fiberglass Corp Apparatus for the production of glass yarns
DE2255443A1 (de) * 1972-11-11 1974-05-30 Schuster & Co F M N Verfahren und vorrichtung zum ausgleichen von kurzzeitigen fadenspannungsschwankungen bei spulmaschinen u.dgl
GB1469533A (en) * 1973-09-24 1977-04-06 Nat Res Dev Tensioning and/or slack take-up device for flexible material in sheet or thread form
US3999909A (en) * 1974-08-09 1976-12-28 Barmag Barmer Maschinenfabrik Aktiengesellschaft Spinning apparatus with pneumatic filament conveyor tube
GB1566955A (en) * 1977-01-27 1980-05-08 Heathcoat & Co Ltd Heating and drawing of synthetic filaments
US4119253A (en) * 1977-06-20 1978-10-10 Owens-Corning Fiberglas Corporation Method and apparatus for controlling the advancement of a strand
US4637229A (en) * 1985-02-11 1987-01-20 Taylor James W Jr Pneumatic thread tensioning device
DE3701671C2 (de) * 1987-01-22 1994-11-03 Stoll & Co H Flachstrickmaschine
JPH01314762A (ja) * 1988-06-16 1989-12-19 Sadao Sawada 空気流による給糸装置
JPH05209343A (ja) * 1992-01-27 1993-08-20 Norimasa Shoda 緯糸張力付加装置
US5351373A (en) * 1992-07-29 1994-10-04 Puget Sound Rope Corporation Method and apparatus for heat stretching synthetic fiber rope
DE19611320C2 (de) * 1996-03-22 1999-05-20 Dornier Gmbh Lindauer Verfahren und Vorrichtung zum pneumatischen Unterstützen des Eintragens und Spannens eines Schußfadens in Webmaschinen
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Also Published As

Publication number Publication date
CN100554544C (zh) 2009-10-28
DE50208092D1 (de) 2006-10-19
US20050217094A1 (en) 2005-10-06
KR100636075B1 (ko) 2006-10-18
US7275291B2 (en) 2007-10-02
WO2003076704A2 (de) 2003-09-18
WO2003076704A3 (de) 2003-11-27
JP2005527707A (ja) 2005-09-15
SE0200745D0 (sv) 2002-03-12
KR20040104505A (ko) 2004-12-10
AU2002325887A1 (en) 2003-09-22
EP1483436A2 (de) 2004-12-08
AU2002325887A8 (en) 2003-09-22
CN1623017A (zh) 2005-06-01

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