EP 1167599 A2 20020102 - Process to get comparatively identical weaving cycle times in air jet looms and air jet looms for carrying out said process
Title (en)
Process to get comparatively identical weaving cycle times in air jet looms and air jet looms for carrying out said process
Title (de)
Verfahren zur Ausführung vergleichsweise identischer Webzykluszeiten in Düsenwebmaschinen und Düsenwebmaschine zur Verfahrendurchführung
Title (fr)
Procédé pour obtenir des temps de cycle de tissage relativement identiques dans les métiers à jet d'air et métiers à jet d'air pour mettre en oeuvre dudit procédé
Publication
Application
Priority
DE 10028049 A 20000606
Abstract (en)
[origin: DE10028049A1] To ensure identical weaving cycles, at a jet loom, the database in the loom control has data at least for the weft flight time by characteristic quality parameters for each type of weft yarn, with a nominal pressure profile. The actual weft yarn flight time is measured for comparison with a nominal flight time. The difference signal is converted by the control into a control signal to act on the valve system to vary the pressure and/or volume of the weft carrying medium by a continuous adjustment of the nominal pressure profile. To give identical weaving cycles at a jet loom, the converted control signal can be used to adjust the loom speed. An Independent claim is included for a jet loom with a valve structure (2) fitted with piezo electric drives (5) to set the pressure and/or volume of the medium to carry the wefts through the shed. Preferred Features: The valve structure has at least one frame valve module (3) with an outlet (11) which is operated by a piezo electric actuator. The valve module is held between two flange plates, with an inlet (16) in at least one flange plate. The piezo electric actuator has a piezo electric rocker, held at one side, with a valve plate (5a) at its free end at the outlet. With a multi-module valve assembly, each piezo electric actuator is controlled separately. At least one sensor (9) is within each valve module, with a signal link to the control. A sensor can be at the outlet, with a signal link to the control. A measurement system works with the piezo electric actuators. The valve plate can be fitted with a permanent magnet, which works with an electrically-energized coil around the outlet to increase/decrease tension on the actuator. Or a spring acts on the actuator to set its tension.
Abstract (de)
Das Verfahren besteht erfindungsgemäß darin, dass dem für die Fadenflugzeit charakteristischen, in einer Datenbank der Webmaschinensteuerung gespeicherten Qualitätsparameter jedes Schussfadens ein die Sollfadenflugzeit sicherndes Soll-Druckprofil zugeordnet wird, womit auf die Ermittlung einer durchschnittlichen Schusszeit je Schussfadentyp, wie aus dem Stand der Technik bekannt, verzichtet wird. Das die Schussfadenflugzeit sichernde Soll-Druckprofil wird erfindungsgemäß durch Verwendung einer Ventilstruktur (2) mit piezo-elektrischen Antrieben (5) erreicht. <IMAGE>
IPC 1-7
IPC 8 full level
D03D 47/28 (2006.01); D03D 47/30 (2006.01); D03D 51/12 (2006.01)
CPC (source: EP US)
D03D 47/3033 (2013.01 - EP US); D03D 47/306 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1167599 A2 20020102; EP 1167599 A3 20050615; DE 10028049 A1 20011220; DE 10028049 B4 20060629; JP 2002105800 A 20020410; JP 3507814 B2 20040315; US 2002005224 A1 20020117; US 6439271 B2 20020827
DOCDB simple family (application)
EP 01111479 A 20010511; DE 10028049 A 20000606; JP 2001169624 A 20010605; US 87578301 A 20010606