EP1440193A1 - Fadenverarbeitendes system - Google Patents
Fadenverarbeitendes systemInfo
- Publication number
- EP1440193A1 EP1440193A1 EP02783009A EP02783009A EP1440193A1 EP 1440193 A1 EP1440193 A1 EP 1440193A1 EP 02783009 A EP02783009 A EP 02783009A EP 02783009 A EP02783009 A EP 02783009A EP 1440193 A1 EP1440193 A1 EP 1440193A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- thread
- tensiometer
- processing system
- brake
- tension
- 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
-
- 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
Definitions
- the invention relates to a thread processing system according to the preamble of claim 1.
- the thread tension target profile When setting up for the first time or after changing to a different thread quality (style change), the thread tension target profile must be adjusted for the entry cycle.
- a nominal thread tension profile is selected which guarantees an optimal entry frequency and entry speed with as few thread breaks as possible for the respective thread quality.
- the thread tension is influenced by many parameters, for example the withdrawal tension from the thread delivery device, the braking effect of the thread brake, the type and function of the insertion device of the textile machine, the thread quality, and the like.
- Characteristics of the thread are also decisive for the resulting thread tension profile. These parameters require certain settings, for example, on brake devices influencing the thread tension. Deviations from the set thread tension profile requiring compensation can occur over time in the operation of the thread processing system, for example due to different supply spool diameters, fluctuating thread characteristics and differently spooled supply spools. For obvious reasons, the textile machine should process the thread as quickly as possible. The strength of the thread places a limit on weak threads. If the machine speed is increased above a critical limit, the number of thread breaks increases exponentially. The highest tension peaks caused by high entry speeds can be reduced by means of a controlled thread brake, so that the tension remains at low values in particularly critical phases of the entry.
- controllable and adjustable thread brakes For this purpose there are already high quality, controllable and adjustable thread brakes. Their precise adjustment is difficult, so that in practice they have only a limited positive influence on the processing efficiency in the thread processing system. Controlled thread brakes can only be optimally adjusted with the information on the actual tension or the actual tension profile during an entry cycle.
- the tensiometer In the- Formation of thread tension can be obtained with the tensiometer.
- the tensiometer means an additional thread friction angle when measuring the thread tension.
- this additional friction angle, caused by the tensiometer can be a disaster because the additional tension caused by the tensiometer dramatically increases the likelihood of thread breaks, so that a tensiometer cannot be used for weak threads during continuous operation of the thread processing system.
- a portable tensiometer which is held in the thread path, measures the thread tension and, if necessary, displays it in a laptop.
- the tensiometer is used for a representative number of entry cycles for adjusting the nominal thread tension profile, for example to set the withdrawal tension from the thread delivery device, the braking level or timing of the thread brake, and the like. During this adjustment phase, thread breaks or other disturbances can occur until the optimal thread tension target profile is finally found and established.
- a thread processing system is known from EP 0 357 975 A, in which a controlled thread brake is operated with the aid of a tensiometer permanently placed in the thread path.
- the tensiometer which works permanently in its detection position, allows the adjustment of an optimal thread tension target profile, its influence is disadvantageous due to the additional thread deflection and friction point in the case of weak thread qualities.
- a thread processing system is known from EP 0 605 550 A, in which a tensiometer is permanently assigned to a controllable thread brake and can be switched between a passive position and a detection position. As the tensiometer is only temporarily switched to the detection position during each entry cycle, namely only when the thread brake is working at the same time, no information about the thread tension is available if the thread brake does not brake. The tensiometer can only measure a limited section of the thread tension profile during an entry cycle. In order to adjust the optimal thread tension target profile, however, the development and the course of the thread tension over the entire entry cycle is required.
- the invention is based on the object of specifying a thread processing system of the type mentioned at the outset which enables high insertion speeds with a minimal thread breakage rate for different thread qualities.
- the tensiometer As soon as the tensiometer is switched to the detection position, it monitors the development and the course of the thread tension during the entire entry cycle.
- the tensiometer remains in the detection position over a representative number of entry cycles, typically in about 50 - 100 entry cycles, until the optimal thread tension target profile is adjusted by varying the parameters influencing the thread tension, which ensures a minimum number of thread breaks at an optimally high insertion speed.
- the tensiometer can continue to remain in the detection position after adjustment in order to continue to provide information about the thread tension permanently, strong thread qualities tolerating the additional friction caused by the tensiometer.
- the optimal thread tension target profile can also be adjusted for weak thread qualities, possibly with faults caused by the tensiometer, which, however, after the tensiometer has been switched back to its passive position, is optimal high threading speed guarantees a minimal thread break rate.
- the short period of time over which the weak thread has to tolerate the additional friction does not mean a significant reduction in the efficiency of the textile machine.
- new settings of the parameters can also be made during continuous operation, for example on the controllable thread brake if, for example, the thread breakage rate should have increased as a result of the influences described above.
- the thread brake is not controlled, the tension measured by the tensiometer in its detection position can be used on the basis of graphic or numerical representations to manually adjust the braking level of the thread brake.
- the convertible tensiometer is expediently assigned to a thread brake that works with an adjustable braking level that remains constant over the entry cycle in order to change the braking level until the optimal thread tension target profile is found, or a controllable thread brake that varies its braking effect during the same entry cycle.
- the timing and / or the braking level of the controlled thread brake can be set.
- the tensiometer is advantageously connected directly to an adjusting device of the thread brake, so that feedback is used in a closed control loop.
- a computerized control device or braking level adjustment of the thread brake is available, which may respond to the measured thread tension in a corrective manner.
- the tensiometer or at least the element which acts on the thread during measurement can be changed over manually or mechanically.
- a manual change can be made by directly attacking the tensiometer or the element.
- a mechanical changeover is carried out, for example, with the aid of a spring which automatically switches the tensiometer to the passive position after the representative number of entry cycles, triggered by a timer or a program.
- the tensiometer or the element acting on the thread is advantageously connected to a changeover actuator, preferably an electromagnet or an electric motor, which receives the command, for example via a timer or programming, to establish the passive position of the tensiometer after the representative number of entry cycles.
- a changeover actuator preferably an electromagnet or an electric motor
- receives the command for example via a timer or programming
- to establish the passive position of the tensiometer after the representative number of entry cycles Convenient handling is achieved if the tensiometer has a display device for the measurement result (s), preferably with a graphic and / or numerical representation.
- the tensiometer is permanently arranged in the thread path, it is expedient to connect it to the control panel of the textile machine, so that it can not only be changed over from the control panel, but its measurement results can also be recorded and displayed there if necessary. It is helpful if the display usually provided in the control panel can also be used to show the measured thread tension.
- the tensiometer is structurally combined with the thread brake, preferably using at least one thread deflection point of the thread brake for the measurement.
- the tensiometer can also be arranged upstream or downstream of a thread detector, preferably a weft thread detector of a weaving machine, and is expediently then even structurally combined with the weft thread detector, preferably using at least one thread deflection point of the weft thread detector for the measurement.
- a thread detector preferably a weft thread detector of a weaving machine
- the tensiometer can be switched particularly expediently into several different, for example thread quality-dependent, detection positions, which differ, for example, by their respective thread deflection angles. Because heavy thread qualities require a smaller rubbing angle than light thread qualities for a correct tension measurement. So that correct measurements can be achieved despite the different detection positions, it is expedient to provide an electronic measurement evaluation device which has an automatic compensation circuit for the different detection positions in order to compensate for the then different parameters, at least one position sensor being provided for the respective detection position, which is connected to the evaluation device. In the different detection positions there are different force triangles during the measurement. These different triangles of force would influence the measurement parameters and falsify the measurements. However, the evaluation electronics can select the correct parameters with the information from the position sensor and ensure correct measurements regardless of the respective detection position.
- a tensiometer is expediently permanently provided and convertible in each thread channel in order to be able to set the same or even an individual, optimal thread tension profile for each thread channel ,
- the invention is applicable to all types of weaving machines and knitting machines. Preference is given to a thread processing system whose textile machine is a rapier or projectile weaving machine, although a jet weaving machine is also possible. In the case of knitting machines, different types of machines can be affected, such as circular knitting machines or flat knitting machines or the like.
- FIG. 1 schematically shows a side view of a thread processing system with a weaving machine
- FIG. 2 shows a detail as a variant of FIG. 1,
- FIG. 3 shows a further detail as a variant of FIG. 1
- Fig. 4 shows a detail as a further variant of Fig. 1
- Fig. 5 is a thread tension target profile.
- a thread processing system S in FIG. 1 comprises at least one thread delivery device F which is assigned to a channel K1 of a textile machine M and which supplies a thread Y to the textile machine M.
- the thread Y is removed from a thread spool L, temporarily stored in the thread delivery device F on a storage body 1 and inserted into the textile machine M along a thread path through an insertion device E.
- Textile machine M in FIG. 1 is a weaving machine, in particular a projectile or rapier weaving machine, but could also be a jet weaving machine. Alternatively, the weaving machine can also be a knitting machine.
- a thread brake B is arranged in the thread path downstream of the thread delivery device F, a tensiometer T is permanently arranged downstream thereof, a weft thread detector D is optionally arranged downstream of the same, and subsequently the insertion device E, from which the thread Y in by a control device CU the weaving machine certain entry cycles are intermittently entered in a shed 8 and struck by a reed, not shown.
- the control device CU of the weaving machine includes an operating panel (not highlighted) with a display G.
- a draw-off brake 2 is assigned to the storage body 1 of the thread delivery device and generates a certain, relatively constant basic tension in the thread Y during the withdrawal.
- no take-off brake 2 is provided, but rather a stop device, not shown, which measures the length of the weft threads.
- the thread brake B has an adjusting device 3 by means of which the braking level (the braking force) can be adjusted in order to generate a desired thread tension in the thread Y between the input device E and the thread brake B during the pull-off.
- the braking level the braking force
- stationary thread guide elements 5 are optionally provided.
- a controlled thread brake B with a control device 4 is indicated as a possible alternative.
- the controlled thread brake B e.g. is activated and deactivated by the control device CU as a function of control signals during each entry cycle in order to vary the braking effect during the same entry cycle and / or to switch between non-braking and braking phases.
- the weft thread detector D registers the movement of the drawn-off thread Y and generates a fault signal if no movement is detected in a phase during which movement of the thread Y is to be expected.
- the insertion device E has a thread selector which selects the thread Y to be entered in each case from one of possibly several thread channels and assigns it to the entry element which enters the thread into the shed 8 before it is struck and cut by the reed .
- the thread Y is taken over at the entry-side end of the shed by a rapier gripper and transported approximately to the center of the shed 8, then transferred to a take-up rapier, and is then completely carried by the shed 8.
- a projectile weaving machine a projectile is shot through with every weft thread.
- the insertion device E has at least one main nozzle and possibly additional nozzles in the shed 8 in order to insert the yarn Y with air jets.
- the thread processing system S Downstream of the thread brake B, the thread processing system S has the permanently installed tensiometer T, which (or its element P which acts on the thread Y) can be switched between a passive position (dashed line) in which the thread Y is not acted on and at least one Detection position (in solid lines), in which the thread Y is deflected and subjected to friction in order to measure the thread tension.
- the redirection takes place, for example, in relation to när thread guide elements 5.
- the changeover movement is indicated by a double arrow 6.
- the tensiometer T has a display 7 for the measured tension, wherein the thread tension can be displayed graphically and / or numerically in the form.
- Dashed lines indicate that the tensiometer T is connected to the control device CU or the control panel of the textile machine. Then the display G can be used to show the measured voltage, or the input devices in the control panel to operate the tensiometer and adjust it if necessary.
- the tensiometer T can be arranged at different positions, as indicated by the arrows a, b and c.
- the tensiometer T is used to adjust or establish an optimal thread tension target profile (a tension curve over the entry) for the entry cycles, which guarantees the lowest rate of thread breaks at an optimally high entry speed into the textile machine.
- the nominal thread tension profile is shown schematically in FIG. 5 using the example of a rapier weaving machine.
- the adjustment of a thread tension target profile is carried out, among other things, when starting up for the first time or after a change in the processed thread quality, or if the quota of thread breaks should increase during operation of the thread processing system.
- the adjustment can be carried out manually on components of the thread processing system which are decisive for the thread tension, or also automatically in at least one closed control loop with feedback.
- a sequence of entries is carried out, typically 50-100 entries, in order to set the parameters influencing the thread tension profile.
- the tensiometer T remains in the detection position after the adjustment. It can then optionally be used to control the controllable thread brake B and the like.
- the tensiometer T is switched to the passive position after the adjustment phase, so that it then no longer has any influence on the thread Y.
- a manually switchable tensiometer T can be seen, the element P which acts on the thread is adjustably mounted in a guide 9 and can be moved back and forth between stops 10 which define the passive position I and a detection position II.
- a hand lever 11 is provided, for example, which can be pivoted in the direction of the double arrow 6 and carried out by hand.
- the tensiometer could be acted upon by a spring in the direction of the passive position and held in the detection position by a catch.
- a control device not shown, e.g. a timer or a program release the lock after the representative number of entry cycles required for adjustment, so that the tensiometer T is then automatically switched to the passive position.
- the tensiometer T is connected to an actuator A which performs the switching movements (double arrow 6).
- the actuator can be an electromagnet or an electric motor.
- the tensiometer T or its element E which acts on the thread not only has a detection position II, but at least one further detection position III. Different thread deflection angles result in the two detection positions II and III.
- the actuator A can be controlled from the control panel of the weaving machine in order to set the desired detection position, or directly on the tensiometer T.
- a timer or a programming Z can be provided, which the Conversion initiated after performing the representative number of entry cycles.
- FIG. 3 shows a control unit C of the tensiometer T in which an evaluation device 11 for the measurement result (computerized circuit with a microprocessor processor) and possibly a compensation device 12, which takes into account the different triangles of force in the different detection positions II and III, in order nevertheless to be able to deliver correct measurement results.
- the control device C of the tensiometer T can be connected to at least one position sensor 13, which registers the respectively assumed detection position II or III and informs the control device C accordingly for compensation.
- the tensiometer T can be structurally combined with the thread brake B or the detector D. 4, the tensiometer T uses, for example, a thread guide element 14 of the detector D as a stationary deflection point relative to the element P.
- the thread guide element 14 is, for example, a piezoelectric element which responds to the thread movement.
- a similar structural combination could also be provided with the thread guide element 5 downstream of the thread brake B.
- Fig. 5 illustrates the thread tension (in grams g) over an entry cycle (angle of rotation of the main shaft of the weaving machine).
- the thread is under a certain basic tension, caused by the pull-off brake 2 and the thread brake B (if this is not a controllable thread brake, but has a basic setting of the braking level).
- a first, relatively sharp increase in tension 16 results in curve 15.
- the thread tension in the curve part 17 increases before it decreases again in the middle of the shed when the slave gripper is decelerated shortly before the transition phase.
- the tensiometer T measures the thread tension downstream of the thread brake B.
- the pull-off brake 2 and the thread brake B and possibly the detector D can now be set so that the optimal curve 15 of Fig. 5 results.
- These settings can be made by hand, or in a closed control loop with automatic control devices not highlighted in more detail, for example guided via the control device C and / or the control device CU. In this way, curve 15 is established.
- the thread processing system S can start its normal operation. In the case of a strong thread that does not tend to break despite the action of the tensiometer, the tensiometer T remains in the detection position.
- the tensiometer T is set to the passive position so as not to influence the thread. At most when irregularities occur or the thread breakage rate increases, or even regularly only for "checking", e.g. With every 100,000th entry, the tensiometer T can also be switched back into or into a detection position in order to be able to make new adjustments.
- the tensiometer shown works according to the thread deflection principle with the element P, which is set relative to two stationary deflection points 5 transversely to the thread travel path.
- other types of tensiometers can also be used, for example with a piezoelectric element or with a pivotable element P.
- the display 7 can be provided directly on the tensiometer. It is also conceivable, in addition to the display 7, or alternatively to use only the display G on the control panel of the weaving machine.
- auxiliary options which are not highlighted can be directions which automatically carry out the settings in a closed control loop, guided by the measurement result of the tensiometer T.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10153326 | 2001-10-29 | ||
DE10153326A DE10153326A1 (de) | 2001-10-29 | 2001-10-29 | Fadenverarbeitendes System |
PCT/EP2002/011954 WO2003038171A1 (de) | 2001-10-29 | 2002-10-25 | Fadenverarbeitendes system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1440193A1 true EP1440193A1 (de) | 2004-07-28 |
EP1440193B1 EP1440193B1 (de) | 2006-12-27 |
Family
ID=7704089
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02783009A Expired - Lifetime EP1440193B1 (de) | 2001-10-29 | 2002-10-25 | Fadenverarbeitendes system |
Country Status (5)
Country | Link |
---|---|
US (1) | US7073399B2 (de) |
EP (1) | EP1440193B1 (de) |
CN (1) | CN100425752C (de) |
DE (2) | DE10153326A1 (de) |
WO (1) | WO2003038171A1 (de) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE502005008310D1 (de) * | 2004-11-22 | 2009-11-26 | Itema Switzerland Ltd | Verfahren zum Abbremsen eines Schussfadens einer Webmaschine |
EP1659201B1 (de) * | 2004-11-22 | 2009-07-08 | Sultex AG | Verfahren zum Abbremsen eines Schussfadens einer Düsenwebmaschine |
DE502005007653D1 (de) * | 2004-11-22 | 2009-08-20 | Sultex Ag | Verfahren zum Abbremsen eines Schussfadens einer Düsenwebmaschine |
ITMI20051929A1 (it) * | 2005-10-13 | 2007-04-14 | Savio Macchine Tessili Spa | Dispositivo e procedimento per la misurazione di precisioni della metratura del filo avvolto su una rocca |
WO2009025803A1 (en) | 2007-08-20 | 2009-02-26 | Kevin Kremeyer | Energy-deposition systems, equipment and methods for modifying and controlling shock waves and supersonic flow |
EP2128318A1 (de) * | 2008-05-30 | 2009-12-02 | Iro Ab | Aufnahmevorrichtung |
ITMI20120062A1 (it) * | 2012-01-20 | 2013-07-21 | Comat S R L | Telaio ad ago |
ITMI20120141A1 (it) * | 2012-02-03 | 2013-08-04 | Btsr Int Spa | Sistema e metodo per la gestione semplificata dell'alimentazione di una pluralita' di fili a tensione e/o velocita' costante ad una macchina tessile |
US10669653B2 (en) * | 2015-06-18 | 2020-06-02 | Kevin Kremeyer | Directed energy deposition to facilitate high speed applications |
ITUB20155266A1 (it) * | 2015-10-30 | 2016-01-30 | Roj S R L | Freno elettromagnetico pilotato per il controllo della tensione dei fili di trama in macchine tessili |
BE1023286B1 (nl) * | 2015-11-10 | 2017-01-20 | Gilbos Nv | Spanningscompensator |
CN106592069B (zh) * | 2016-12-30 | 2018-07-06 | 吴江市兴业纺织有限公司 | 一种喷气织机 |
CN110261029A (zh) * | 2019-07-24 | 2019-09-20 | 合肥市尚技体育用品有限公司 | 一种便捷式羽毛球拍磅数检测设备 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2854378A1 (de) * | 1978-01-12 | 1979-07-19 | Heberlein & Co Ag | Vorrichtung zur texturierung von textilgarnen aus thermoplastischem material durch friktions-falschdrallerteilung |
IT1227077B (it) | 1988-09-08 | 1991-03-14 | Vamatex Spa | Sistema per controllare la tensione della trama alimentata ad un telaio tessile senza navette. |
US5221059A (en) * | 1991-01-30 | 1993-06-22 | Basf Corporation | Uniform yarn tensioning |
DE4131656A1 (de) * | 1991-09-23 | 1993-03-25 | Iro Ab | Verfahren und webmaschine |
US5476122A (en) * | 1993-03-05 | 1995-12-19 | Lindauer Dornier Gesellschaft Mbh | Weft thread brake responsive to yarn characteristics in a loom |
DE4323748C1 (de) * | 1993-07-15 | 1994-07-14 | Dornier Gmbh Lindauer | Schußfaden-Bremseinrichtung für Webmaschinen |
US5844494A (en) * | 1993-04-29 | 1998-12-01 | Barmag Ag | Method of diagnosing errors in the production process of a synthetic filament yarn |
SE9400248D0 (sv) * | 1994-01-26 | 1994-01-26 | Iro Ab | Styrbar utgångsbroms för garnmatningsanordning till textilmaskiner, i synnerhet vävmaskiner av projektil eller gripar-typ |
DE19858682A1 (de) * | 1998-12-18 | 2000-06-21 | Iro Patent Ag Baar | Fadenverarbeitungssystem und Verfahren zum Liefern von Schußfäden |
SE0102323D0 (sv) * | 2001-06-27 | 2001-06-27 | Iropa Ag | Fadenverarbeitendes system und fadenliefergerät |
-
2001
- 2001-10-29 DE DE10153326A patent/DE10153326A1/de not_active Withdrawn
-
2002
- 2002-10-25 DE DE50209102T patent/DE50209102D1/de not_active Expired - Lifetime
- 2002-10-25 WO PCT/EP2002/011954 patent/WO2003038171A1/de active IP Right Grant
- 2002-10-25 CN CNB028216822A patent/CN100425752C/zh not_active Expired - Fee Related
- 2002-10-25 US US10/494,401 patent/US7073399B2/en not_active Expired - Fee Related
- 2002-10-25 EP EP02783009A patent/EP1440193B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO03038171A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN100425752C (zh) | 2008-10-15 |
US20050061388A1 (en) | 2005-03-24 |
WO2003038171A1 (de) | 2003-05-08 |
US7073399B2 (en) | 2006-07-11 |
CN1578860A (zh) | 2005-02-09 |
EP1440193B1 (de) | 2006-12-27 |
DE10153326A1 (de) | 2003-05-08 |
DE50209102D1 (de) | 2007-02-08 |
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