EP1483436A2 - Pneumatischer fadenstrecker und fadenverarbeitungssystem - Google Patents
Pneumatischer fadenstrecker und fadenverarbeitungssystemInfo
- Publication number
- EP1483436A2 EP1483436A2 EP02760248A EP02760248A EP1483436A2 EP 1483436 A2 EP1483436 A2 EP 1483436A2 EP 02760248 A EP02760248 A EP 02760248A EP 02760248 A EP02760248 A EP 02760248A EP 1483436 A2 EP1483436 A2 EP 1483436A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- thread
- pneumatic
- stretcher
- processing system
- air flow
- 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
Links
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
- 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 stretcher and a thread processing system according to the preamble of claim 7.
- the pneumatic thread stretcher is arranged in such a way that the air flow emerging from the blow-out end of its tubular body is opposite to the thread running direction.
- a cylinder with a cylinder axis oriented transversely to the thread running direction is arranged at a considerable distance in front of the blow-out end of the tubular body, the outer circumference of which affects approximately the extension of the axis of the tubular body.
- the air stream emerging from the blow-out end along the thread is deflected away on the outer circumference of the cylinder away from the elongated axis of the tubular body, wherein it forms a stretching loop in the thread.
- the flow rate and the pressure of the air flow are adjustable.
- the pneumatic thread stretcher works continuously. It is also useful in a loom thread processing system. The continuous operation of the pneumatic thread stretcher does not only result in high air consumption due to the air flow spreading laterally on the cylinder, but the thread can be damaged in its resting phase by the flow dynamics of the air flow.
- the invention has for its object to provide a pneumatic thread stretcher of the type mentioned, which is structurally simple and stretches the thread effectively, has relatively low air consumption, and does not pose a risk to the thread. It is also an object of the invention to provide a thread processing system with at least one pneumatic thread stretcher, in which the thread stretcher operates with a relatively low air consumption and does not pose a hazard to the thread.
- the air flow deflection surface in the thread stretcher is a seamless and laterally limited extension of the inner wall of the guide channel, essentially the entire energy of the air flow is used to stretch the thread. Portions of the air flow cannot vanish sideways in front of the deflection surface. The result is a relatively laminar flow that optimally exploits the Coanda effect by adhering to the deflection surface and pulling the thread from the tube body axis laterally into the loop and thus stretching the thread if the thread should yield at this point.
- the lateral limitation of the deflection surface avoids loss of compressed air and acts in the sense of an effective and defined control of the thread when forming the loops.
- the thread processing system by changing the flow rate or the pressure of the air flow along the deflection surface between at least two different levels and in association with the operating cycle of the textile machine, not only the air consumption is reduced, but especially in the resting phases of the thread, the risk of thread damage due to the flow dynamics of the air flow minimized.
- the mechanical load on the thread is not critical.
- the high level is assigned to the operating cycle of the textile then set, and only temporarily, if an additional stretching action by the pneumatic thread stretcher is required for proper thread control.
- the air flow deflection surface in the thread stretcher is in one piece with the tubular body. This means that no separate holder for the deflection surface is required.
- the extension is expediently designed in the manner of a half pipe, which is delimited on both sides by guide walls, so that the air flow is guided cleanly as soon as it follows the deflection surface, and the thread is also deformed into the stretching loop in a controlled manner.
- the side walls can diverge or converge from the airflow deflecting surface or can also run parallel to one another. They should be spaced so far apart that the thread does not contact the side walls when the normal thread path is stretched.
- the extension is formed from an excess length of the tube body, which is cut open in the longitudinal direction, so that the tube walls bend or open outwards and the entire excess length can be bent away to one side of the tube body axis.
- the thread stretcher includes an adjusting element, with which the flow rate or the pressure of the air flow generated along the deflection surface can be switched between at least two different setting values, expediently remote-controlled, so that the thread stretcher only then has a significant stretching effect in the thread generated when this effect is required for thread control.
- the thread stretcher In phases in which no stretching effect is required, for example in a dysentery phase of the thread, work is carried out at the low level, at which the air flow is sufficiently weak and has no harmful effect on the thread. If, in the rest phase of the thread, the air was blown with an undiminished flow rate or pressure, it would not be possible to avoid the thread dancing in the flow and being dissolved by the flow or even striking contact with the pipe body or the deflection surface and damage.
- the communication of the thread stretcher with the compressed air supply contains at least one adjusting element with an electric actuator, preferably a solenoid valve, in order to switch between at least two different levels of the flow rate or the pressure.
- the operation of the thread stretcher can be controlled in this way depending on the operating cycle of the textile machine.
- the signals which cause the changeover between the levels are transmitted via a signal connection, either from a control device of the textile machine or the thread delivery device, or from a communication system into which the textile machine and / or the thread delivery device is (are) integrated.
- a communication system e.g. a data bus system (CAN or the like)
- a control box is often provided, from which different functional units are controlled or monitored.
- the signals for actuating the actuator of the thread stretcher can preferably be derived from this central control box, e.g. by means of a message translating processor.
- the textile machine is used to produce a patterned product, e.g. 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 advisable to design the device so that it adjusts the thread stretcher depending on the pattern between the Levels.
- the thread stretcher of an activated thread channel can be switched between the high and low levels by the device, adapted to the operating cycle of the textile machine in this thread channel.
- the high level is set in each case, for example, if additional thread stretching is to be used to prevent the thread from being too loosely at times, or to prevent a component of the text Assist the tilmaschine by increased thread tension, which temporarily needs a stronger pull in the thread to function properly.
- the device can be designed in such a way that the strong flow rate or the high pressure in the thread stretcher is temporarily set in each case during an insertion process when the bringer gripper takes over the thread tip and / or transfers the thread tip to the take-up rapier, and / or the entry process is ended.
- the low level is set because then a significant pull in the thread is safely translated.
- the changeover is carried out by the device by means of signals which represent certain angles or ranges of rotation of the main shaft of the rapier weaving machine in the aforementioned operational phases.
- a pneumatic thread stretcher is provided in each thread channel.
- the device is designed in such a way that it switches the flow rate or the pressure to the low level when the thread channel is not activated with this thread stretcher and the thread e.g. remains in a resting phase. This is preferably done using 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 stretcher if the thread stretcher downstream of the thread delivery device is functionally combined in the thread travel path with a stationary thread brake ring, preferably a soft, bristle brake ring, which contacts a pull-off end of a stationary storage drum in the thread delivery device.
- the bristle brake ring generates a relatively constant, low basic tension in the thread, on which the thread stretcher superimposes an additional tensile load, at all at the low level or not at all significantly, but significantly at the high level.
- the bristle brake ring also prevents the thread from possibly extending upstream of the loop formed the storage drum can relax, which would disturb the thread turns held there.
- FIG. 1 shows a schematic overall view of a thread processing system, with several detailed variants being indicated,
- Fig. 2 is a partial longitudinal section of a pneumatic thread stretcher
- Fig. 3 is a view of the thread stretcher of Fig. 2 from the left side.
- a thread processing system S in Fig. 1 includes i.a. a textile machine R, for example a rapier weaving machine or a knitting machine, at least one thread delivery device F, and a pneumatic, controlled thread stretcher T in the thread travel path downstream of the thread delivery device.
- a textile machine R for example a rapier weaving machine or a knitting machine
- at least one thread delivery device F for example a rapier weaving machine or a knitting machine
- a pneumatic, controlled thread stretcher T in the thread travel path downstream of the thread delivery device.
- the textile machine R explained using the example of a rapier weaving machine has a shed D and drivable bring and take grippers B, N for inserting at least one thread Y, Y1 from at least one thread channel.
- the gripper B takes over the thread tip in an entry and thread selector device 2 and pulls the thread into the middle of the shed D, where it transfers the thread tip in an area 1 to the take-up gripper N, which then pulls the thread entirely through the shed and that Entry ended.
- the thread delivery device F has a housing 3 with a stationary storage drum 4, to which the thread Y is fed in successive turns by means of a winding element 5.
- a trigger eyelet 7 is positioned on a housing bracket 6.
- a thread brake A in the form of a, preferably soft, bristle brake ring 8 is held on the housing arm 6 and contacts a withdrawal end 9 of the storage drum 4 from the outside and counter to the withdrawal direction of the thread.
- the pneumatic thread stretcher T has a housing 10 and a tubular body 11 which extends in the direction of the thread travel path and which has an extension 12 bent laterally in a curved manner opposite to the thread running direction. The detailed design of the thread stretcher T will be explained later with reference to FIGS. 2 and 3.
- a connector 13 is provided on the housing 10 and is or can be connected to a pressure supply P for compressed air.
- the changeover is carried out remotely by means of the device H by signals which come via a signal connection 15 either from a control device C of the thread delivery 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 expediently chosen so that the thread is hardly or not at all loaded.
- the high level is set so that the thread is subjected to an appropriate tensile load by an air stream and, along the extension 12, is deflected from the straight thread path into a lateral loop L and is thereby stretched from the downstream.
- the rapier weaving machine it is expedient to temporarily set the high flow rate or pressure level at that very moment, e.g. as a function of the tapped angle of rotation of the main shaft of the rapier weaving machine when the rapier gripper B takes over the thread tip and / or as soon as the rapier gripper B transfers the thread tip to the slave rapier N and / or finally at the end of the entry process. In between, the thread stretcher T operates at the low level.
- each thread channel is a pneumatic thread assigned to the stretcher B.
- the device H which is responsible for controlling the thread stretcher T, is designed such that it sets 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 thread stretchers together, or a corresponding device H is provided for each thread stretcher.
- a knitting machine is equipped in its thread channels with pneumatic thread stretchers T of the type shown here, and a device H is provided with which the thread stretchers are controlled depending on the operating cycle of the knitting machine between different flow rate and pressure levels.
- the straight tubular body 11 defines an air flow and thread guide channel 20.
- the air flow is generated from the connection 13 against the thread running direction via a nozzle device, which is accommodated in the housing 10 and is not shown in detail.
- the extension 12 forms an air flow deflecting surface 19 which is bent laterally convexly away from the imaginary extension of the tubular body axis and is delimited on both sides by guide walls 17.
- This design is easily produced, for example, by manufacturing the tubular body 11 with an excess length corresponding to the extension 12 and then cutting the excess length lengthwise up to a shoulder 16. Then the tube walls are bent apart to form the guide walls 17 and the extension 12 is brought into the curved shape.
- the inner edges of the guide walls 17 can have inside phases 18 or be rounded in order not to become dangerous for the thread.
- the guide walls 17 of the extension 12, which is U-shaped in its basic form, can diverge or converge starting from the deflection surface 19 or can also run parallel.
- the thread stretcher 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, provided the thread is currently under low internal stress , In Fig. 3 it is indicated that the distance between the guide walls 17 gradually widened.
- the tubular body 11 with its extension 12 could also be a plastic molded part, for example an injection molded part.
- the flow rate and pressure setting element 14 shown in FIG. 1 is expediently a quickly responding pneumatic solenoid valve.
- the nozzle device in the housing 10 is expediently a so-called ejector nozzle, which directs the air flow to the left in FIGS. 1 and 2, and can also suck in air from the right end of the housing 10.
- further devices that monitor or control the thread path can be provided, as is conventional standard in rapier weaving machines.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
- Knitting Machines (AREA)
Abstract
Description
Claims
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 true EP1483436A2 (de) | 2004-12-08 |
EP1483436B1 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 (de) |
EP (1) | EP1483436B1 (de) |
JP (1) | JP2005527707A (de) |
KR (1) | KR100636075B1 (de) |
CN (1) | CN100554544C (de) |
AU (1) | AU2002325887A1 (de) |
DE (1) | DE50208092D1 (de) |
SE (1) | SE0200745D0 (de) |
WO (1) | WO2003076704A2 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7543610B2 (en) * | 2006-06-16 | 2009-06-09 | Sultex Ag | Thread clamp for a rapier head |
US20090308904A1 (en) * | 2006-11-09 | 2009-12-17 | Kulicke And Soffa Industries, Inc. | Wire feed system and method of operating the same |
EP2128318A1 (de) | 2008-05-30 | 2009-12-02 | Iro Ab | Aufnahmevorrichtung |
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 |
EP3575465B1 (de) * | 2018-05-30 | 2023-06-07 | Groz-Beckert KG | Bremselement zum bremsen einer strickelementbewegung, strickelement, strickelementträger, strickvorrichtung und baukastensystem für eine strickvorrichtung |
DE102018133147A1 (de) * | 2018-12-20 | 2020-06-25 | Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh | Fadenführer mit integrierter Luftströmungsdüse |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
DE59707877D1 (de) * | 1997-11-28 | 2002-09-05 | Sulzer Textil Ag Rueti | Verfahren und Vorrichtung zum Eintragen eines Schussfadens in einer Reihenfachwebmaschine |
DE19811014A1 (de) * | 1998-03-13 | 1999-09-16 | Hauni Maschinenbau Ag | Verfahren und Vorrichtung zum Herstellen von Filterstäben für stabförmige Artikel der tabakverarbeitenden Industrie |
EP1112218B1 (de) | 1998-09-10 | 2004-02-25 | B a r m a g AG | Texturiermaschine zum texturieren und aufwickeln eines fadens |
DE10060300A1 (de) * | 1999-12-10 | 2001-06-21 | Rieter Ingolstadt Spinnerei | Verfahren und Vorrichtung zum Verstrecken von textilen Fasern |
-
2002
- 2002-03-12 SE SE0200745A patent/SE0200745D0/xx unknown
- 2002-07-17 CN CNB028285379A patent/CN100554544C/zh not_active Expired - Fee Related
- 2002-07-17 DE DE50208092T patent/DE50208092D1/de not_active Expired - Lifetime
- 2002-07-17 JP JP2003574895A patent/JP2005527707A/ja active Pending
- 2002-07-17 KR KR1020047014260A patent/KR100636075B1/ko not_active IP Right Cessation
- 2002-07-17 EP EP02760248A patent/EP1483436B1/de not_active Expired - Lifetime
- 2002-07-17 AU AU2002325887A patent/AU2002325887A1/en not_active Abandoned
- 2002-07-17 WO PCT/EP2002/007971 patent/WO2003076704A2/de active IP Right Grant
- 2002-07-17 US US10/507,184 patent/US7275291B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO03076704A2 * |
Also Published As
Publication number | Publication date |
---|---|
DE50208092D1 (de) | 2006-10-19 |
KR20040104505A (ko) | 2004-12-10 |
AU2002325887A1 (en) | 2003-09-22 |
KR100636075B1 (ko) | 2006-10-18 |
US7275291B2 (en) | 2007-10-02 |
CN100554544C (zh) | 2009-10-28 |
JP2005527707A (ja) | 2005-09-15 |
WO2003076704A2 (de) | 2003-09-18 |
AU2002325887A8 (en) | 2003-09-22 |
EP1483436B1 (de) | 2006-09-06 |
WO2003076704A3 (de) | 2003-11-27 |
CN1623017A (zh) | 2005-06-01 |
SE0200745D0 (sv) | 2002-03-12 |
US20050217094A1 (en) | 2005-10-06 |
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