EP1838912B1 - Dispositif d'insertion des fils de trame dans un metier a tisser a buse d'air - Google Patents

Dispositif d'insertion des fils de trame dans un metier a tisser a buse d'air Download PDF

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Publication number
EP1838912B1
EP1838912B1 EP06704340A EP06704340A EP1838912B1 EP 1838912 B1 EP1838912 B1 EP 1838912B1 EP 06704340 A EP06704340 A EP 06704340A EP 06704340 A EP06704340 A EP 06704340A EP 1838912 B1 EP1838912 B1 EP 1838912B1
Authority
EP
European Patent Office
Prior art keywords
control
main nozzles
main
regulating
weft
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.)
Not-in-force
Application number
EP06704340A
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German (de)
English (en)
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EP1838912A1 (fr
Inventor
Patrick Puissant
Jean-Marie Bamelis
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.)
Picanol NV
Original Assignee
Picanol NV
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 Picanol NV filed Critical Picanol NV
Publication of EP1838912A1 publication Critical patent/EP1838912A1/fr
Application granted granted Critical
Publication of EP1838912B1 publication Critical patent/EP1838912B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3026—Air supply systems
    • D03D47/3053—Arrangements or lay out of air supply systems
    • 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
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3026—Air supply systems
    • D03D47/3033—Controlling the air supply

Definitions

  • the invention relates to a device for introducing weft threads in an air jet loom with at least one set of successively connected main nozzles, each associated with a control valve whose settings determine the strength of a pulse transmission to the weft, the control valves by means of a control and adjustable are.
  • a set of main nozzles connected in series is used to enter a weft thread.
  • two main nozzles are connected in series, one of which is stationary and the other on a batten.
  • the invention has for its object to provide a device of the type mentioned, in which the vote of the shares of the main nozzles on the impulse transmission is straightforward.
  • the control and regulating device when setting a weaving machine to a new fabric, only a total value for the strength of the momentum transfer has to be set.
  • the control and regulating device then automatically takes over the setting of the individual control valves in a predetermined ratio to each other.
  • This automatic assignment of the settings of the control valves with each other is also retained when the weft insertion is regulated, for example, for the entry of weft threads of filament yarn.
  • the momentum transfer becomes the manipulated variable, which varies depending on the diameter of a weft coil.
  • the regulation changes the amount of compressed air and / or the pressure of the compressed air as a manipulated variable.
  • the control and regulating device automatically ensures that the ratio of the settings of the control valves of the main nozzles of a set is maintained in a suitable manner, according to predetermined criteria.
  • Fig. 1 is a loom 10 indicated by a loom on which a reed 11 and relay nozzles 12 are arranged.
  • a main nozzle 13 is arranged on the entry side, which forms, with an upstream main nozzle 14, a set of main nozzles which serve to introduce a weft thread 15.
  • the main nozzle 14 is fixedly mounted on the frame of the loom.
  • a weft thread 15 is measured in a known manner by means of a Vorspulaus 16 and blown by the main nozzles 13, 14 in a formed of warp threads shed. Within the shed, the weft is drawn from the relay nozzles 12, i. taken from the air streams blown out of these, and further transported to the opposite side of the loom. The arrival of the weft thread 15 on the side opposite the entry side is detected by means of a weft detector 30 and reported as a pulse signal a control and regulating device 17.
  • the relay nozzles 12 are connected to a compressed air supply device, which is not shown in detail.
  • the main nozzles 13, 14 are also connected to a source of compressed air or a device for supplying compressed air.
  • this contains a compressed-air source 18, which supplies compressed air to a tank 20 via a pressure-regulating valve 19.
  • the main nozzles 13, 14 are each connected via a control valve 21, 22 and a switching valve 23, 24 to the tank 20.
  • the control device 17 determines the switching times of the switching valves 23, 24 and the settings of the control valves 21, 22.
  • the main nozzles 13, 14 are connected via reducing valves 25, 26 to the tank. In the line between the reducing valves 25, 26 and the main nozzles 13, 14, a check valve 27, 28 is provided in each case.
  • the control valves 21, 22 are preferably flow control valves, with which the amount of compressed air, which flows to the main nozzles 13, 14, when the switching valves 23, 24 are opened. In the shooting pauses, i. when the switching valves 23, 24 are closed, compressed air flows from the tank 20 via the reducing valves 25, 26 to the main nozzles 13, 14. Thus, a compressed air flow is maintained in the main nozzles 13, 14, which keeps the weft thread 15 stretched.
  • the control valves 21, 22 pressure control valves.
  • the control and regulating device 17 further receives information about the instantaneous angular position of the main shaft of the loom. In the embodiment, this is done for example via an angle detector 31, which is associated with the shaft of the sley 10.
  • control and regulating device 17 is associated with an input unit 29, with the example, the target value for the angle of arrival of the main shaft can be entered, that is, the angle detected by the angle detector 31 angular position at which the weft thread 15 to reach the weft detector 30.
  • the operator can also adjust the impulse transmission to the weft thread 15 exerted by the set of main nozzles 13, 14.
  • Fig. 2 is shown with the X-axis, is provided for the pulse transmission, a setting range of about 25% to 100%.
  • the controller 17 automatically assigns to the selected value of the pulse transmission settings of the control valves 21, 22 of the main nozzles 13, 14, ie, for example, the opening cross sections of these control valves 21, 22.
  • the settings of Control valves 21, 22 determines what proportion of each main nozzle 13, 14 at the entire momentum transfer to the weft thread 15 has.
  • the control valve 21 of the main nozzle 13 is set according to the straight line 40 proportional to the selected pulse transmission, so that at 100% pulse transmission, the control valve 21 is fully open, ie, the opening cross section is 100%.
  • the opening cross section at 25% impulse transmission is 25%, etc.
  • the control and regulating device 17 automatically assigns an adjustment of the control valve 22 of the main nozzle 14 to the value of the selected impulse transmission. This assignment is with the curve 41 in FIG Fig. 2 shown.
  • the control valve 22 opens less than the control valve 21, ie the curve 41 has a lower slope than the curve 40.
  • the adjustment of the control valve 21 of the main nozzle 13 for adjusting the value of the pulse transmission takes place so that, for example, already at 75% pulse transmission a setting of 83% of the opening cross-section of the control valve 21 of the main nozzle 13 is achieved and at a momentum transfer of 90% already 100% opening cross section.
  • a setting of 83% of the opening cross-section of the control valve 21 of the main nozzle 13 is achieved and at a momentum transfer of 90% already 100% opening cross section.
  • an increase thus takes place essentially only by an increase in the momentum transfer by means of the main nozzle 14 whose control valve 22 is still changed in this area, for example, to a larger opening cross section.
  • the setting of the impulse transmission is done by means of an "imaginary" main nozzle.
  • the Weber sets a value for the momentum transfer, for example, 80%, in which case the control and regulating device 17 automatically adjusts the control valves 21, 22 to suitable values, for example so that the opening cross section of the control valve 21 to 90% and the opening cross section of the control valve 22 of the main nozzle 14 is set to 70%.
  • control valves 21, 22 are expediently equipped with stepper motors, which provide an exact adjustment of the opening cross-sections of the Control valves 21, 22 allow.
  • the control and regulating device 17 drives these stepper motors with pulses.
  • Such control valves are for example from the EP 879 307 B1 and the EP 1 086 265 B1 known.
  • filament yarn weft yarns 15 are relatively air-unfriendly when they are from outer layers of a weft yarn bobbin. They then become more and more air-friendly, if they come from further inside layers of this weft coil. Therefore, at the beginning of the execution of a weft bobbin, a stronger momentum transfer is needed, i. a relatively high pressure and / or a relatively high amount per unit time of compressed air, which are then reduced more and more, the farther this weft coil is processed.
  • This reduction of the momentum transfer can be done by means of a control that detects the arrival of the weft thread on the main nozzles 13, 14 opposite side by means of the weft detector 30 and the control and regulating device 17 reports.
  • the control and regulating device 17 additionally receives information about the instantaneous angle of rotation of the main shaft of the loom, for example by means of the angle detector 31 of the shaft of the sley 10. By means of these signals is detected whether a weft thread has arrived at the correct angular position of the main shaft of the loom. In the case of deviations, regulation takes place via the setting of the impulse transmission, i. the adjustment of the control valves 21, 22, in such a way that a constant angle of arrival is obtained.
  • the control and regulating device 17 automatically adjusts the ratio of the settings of the control valves 21, 22 in accordance with the changed momentum transfer.
  • These main nozzles are each control valves 21, 22, 47 assigned, which are actuated by the control and regulating device 17.
  • the control valves 21, 22, 47 are preceded by a common switching valve 49 which connects these control valves 21, 22, 47 with the tank 20.
  • the common switching valve 49 is actuated by the control and regulating device 17.
  • the controller 17 determines the ratio in which the control valves 21, 22, 47 are adjusted to each other, ie the proportion of the main nozzles 13, 48, 14 on the entire pulse transmission.
  • the weaver selects a momentum transfer of an "imaginary" main nozzle, which then automatically divides the control and regulating device by means of the setting of the control valves 21, 47, 22 on the main nozzles 13, 48, 14, without the weaver in normal operation of the loom some of it noted.
  • the number of main nozzles is basically arbitrary. If more than two main nozzles are provided, according to the invention at least two main nozzles should each be assigned a control valve which can be adjusted by the control and regulating device 17.
  • the operator of the weaving machine determines how the control and regulating device should work.
  • the weaver can also decide that during weaving the control and regulating device, for example, a setting of the control valves 21, 22 according to Fig. 2 has made to a setting according to Fig. 3 passes.
  • a setting of the control valves 21, 22 according to Fig. 2 has made to a setting according to Fig. 3 passes.
  • the control valves are adjusted Fig. 2 to a setting according to Fig. 3 is passed.
  • the control valve 21 is no longer at the value of 75%, but to the value of 83% according to the curve 42 after Fig. 3 set.
  • the curves 41 are the same. However, this is only an example, since the curves can also be formed substantially different. In particular, it is also possible to provide over the entire adjustment range of the pulse transmission that the ratio of the settings between the control valves 21, 22 of the main nozzles 13, 14 remains constant or that over the entire adjustment range, a constant difference is maintained.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Claims (4)

  1. Dispositif pour insérer des fils de trame dans une machine à tisser à jet d'air comprenant au moins un jeu de buses principales (13, 14 ; 13, 48, 14) connectées en série, à laquelle chaque fois une soupape de réglage (21, 22 ; 21, 47, 22) est assignée, leurs réglages déterminent l'intensité d'une transmission d'impulsion sur le fil de trame (15), dans laquelle les soupapes de réglage sont réglables par un appareil de contrôle et de réglage (17), caractérisé en ce qu'une valeur pour l'intensité de la transmission d'impulsion qui est exécutée par le jeu des buses principales (13, 14 ; 13, 48, 14) sur le fil de trame (15) est réglable au moyen de l'appareil de contrôle et de réglage (17), qui assigne automatiquement à cette valeur les réglages des soupapes de réglage (21, 22 ; 21, 47, 22) des buses principales, qui déterminent quelle part de la buse principale respectif a de l'intensité totale de la transmission d'impulsion.
  2. Dispositif selon la revendication 1, caractérisé en ce que l'appareil de contrôle et de réglage (17), au moins dans une partie (B, C) de la valeur totale réglable de la transmission d'impulsion, définit une différence constante entre les réglages des soupapes de réglage (21, 22 ; 21, 47, 22) du jeu des buses principales (13, 14 ; 13, 48, 14).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que l'appareil de contrôle et de réglage (17) au moins dans une partie (D, E) de la valeur totale réglable de la transmission d'impulsion, maintient le réglage constante d'une soupape de réglage (21, 22, 47) d'au moins une buse principale (13, 14, 48) du jeu des buses principales (13, 14 ; 13, 48, 14).
  4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'appareil de contrôle et de réglage (17) au moins dans une partie (A) de la valeur totale réglable de la transmission d'impulsion, définit les réglages des soupapes de réglage (21, 22 ; 21, 47, 22) d'un jeu de buses principales (13, 14 ; 13, 47, 14) l'un à rapport de l'autre avec des rapports qui changent selon un profil prédéterminé.
EP06704340A 2005-01-21 2006-01-17 Dispositif d'insertion des fils de trame dans un metier a tisser a buse d'air Not-in-force EP1838912B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005004064A DE102005004064A1 (de) 2005-01-21 2005-01-21 Vorrichtung zum Eintragen von Schussfäden bei einer Luftdüsenwebmaschine
PCT/EP2006/000346 WO2006077063A1 (fr) 2005-01-21 2006-01-17 Dispositif d'insertion des fils de trame dans un metier a tisser a buse d'air

Publications (2)

Publication Number Publication Date
EP1838912A1 EP1838912A1 (fr) 2007-10-03
EP1838912B1 true EP1838912B1 (fr) 2010-11-17

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06704340A Not-in-force EP1838912B1 (fr) 2005-01-21 2006-01-17 Dispositif d'insertion des fils de trame dans un metier a tisser a buse d'air

Country Status (6)

Country Link
US (1) US7726351B2 (fr)
EP (1) EP1838912B1 (fr)
CN (1) CN101107391B (fr)
AT (1) ATE488628T1 (fr)
DE (2) DE102005004064A1 (fr)
WO (1) WO2006077063A1 (fr)

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CN104790101B (zh) * 2015-04-28 2016-08-24 宁波市东盛纺织有限公司 一种宽幅喷气织机
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Also Published As

Publication number Publication date
US20080216912A1 (en) 2008-09-11
EP1838912A1 (fr) 2007-10-03
ATE488628T1 (de) 2010-12-15
DE102005004064A1 (de) 2006-07-27
WO2006077063A1 (fr) 2006-07-27
DE502006008322D1 (de) 2010-12-30
US7726351B2 (en) 2010-06-01
CN101107391A (zh) 2008-01-16
CN101107391B (zh) 2011-02-09

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