EP3374303B1 - Gesteuertes system zum zuführen von schussgarn in einer webmaschine - Google Patents
Gesteuertes system zum zuführen von schussgarn in einer webmaschine Download PDFInfo
- Publication number
- EP3374303B1 EP3374303B1 EP16831760.0A EP16831760A EP3374303B1 EP 3374303 B1 EP3374303 B1 EP 3374303B1 EP 16831760 A EP16831760 A EP 16831760A EP 3374303 B1 EP3374303 B1 EP 3374303B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- weft yarn
- weft
- unwinding
- accumulating
- reel
- 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.)
- Active
Links
- 230000033001 locomotion Effects 0.000 claims description 16
- 238000009941 weaving Methods 0.000 claims description 16
- 238000003780 insertion Methods 0.000 description 9
- 230000037431 insertion Effects 0.000 description 9
- 230000010355 oscillation Effects 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 229920000914 Metallic fiber Polymers 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012432 intermediate storage Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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
- B65H51/00—Forwarding filamentary material
- B65H51/20—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D41/00—Looms not otherwise provided for, e.g. for weaving chenille yarn; Details peculiar to these looms
- D03D41/008—Looms for weaving flat yarns
-
- 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
- D03D47/345—Rotating bobbins
-
- 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 present invention refers to a controlled system for supplying weft yarn in a loom.
- the present invention refers to a system for unwinding, measuring and accumulating weft yarn suitable for weave wefts whose shape and consistency require attention when weaving, avoiding for example their twisting.
- Woven wefts such as ribbons and straps falls within these types.
- the present invention refers to a version of weaving looms equipped with a single gripper, which, by moving for the whole width of the fabric, reaches the opposite end, grips the weft and drags it to the other end.
- These looms are usually defined as mono-grippers.
- the means of transport of the gripper can indifferently be flexible belts or rigid rods.
- weft require: a weft unwinding by rotating the reel to prevent further torsions from forming on the weft itself; an accurate measure of the weft section to be inserted in the loom pitch; a weft accumulation during the non-weaving phase.
- Patent DE10315347B4 discloses a device for accumulating weft yarn comprising a piston-cylinder assembly and a piston-type deflecting device strongly assembled into the cylinder. A lower pressure is applied both on one side of the deflecting device opposite to the direction of the resultant of the traction force, and on the side along the traction force direction. The position of the deflecting device is detected in certain phases and converted into binary codes through an analogue/digital converter. The binary codes are analysed and then converted into an analogue output signal by a digital/analogue converter to be able to control the drive of the supplying coil. The output signal is passed through a low-pass filter connected to a proportional, integral and differential, PID controller.
- Patent application WO2014009063A1 discloses a device for an intermediate storage of two weft yarns shaped as a strap or ribbon for a weaving machine.
- the device comprises two containers, in each one of which a U-shaped ring of a weft filament can be formed.
- means are provided for applying weft traction forces, in the internal chamber of the respective container.
- Deflecting elements are arranged on the containers, so that the respective weft material can be supplied in the internal chamber in a region, which is nearer to the narrow side of the internal chamber.
- FR 2 352 906 A1 discloses a device for supplying ribbon-like weft yarn at constant tension with a rotating supply spool, a motor driven forwarding roller and a compensating arm controlling the circuit for starting and stopping the feeder motor.
- a problem present when weaving wide wefts, such as ribbons and straps, is having to comply with parameters such as traction force and accuracy of the weft length to be accumulated before weaving, in addition to having to avoid the torsion of the sliding yarn.
- Object of the present invention is solving the above prior art problems, by providing a system for supplying weft yarn wherein the three steps, unwinding, measuring and accumulating, are performed through an increase of the accuracy of the physical quantities in a mutual relationship.
- a further object is making the reel unwinding speed constant to avoid the negative influence of various motions.
- a further object is using actuators in a mutual relationship having the same resolution accuracy to be able to strongly reduce the degree of discretization and to increase the control accuracy of the section of length of the weft to be woven depending on the traction acting on the yarn itself.
- a further object is embedding in a single actuator the measuring and accumulating steps depending on the weft unwinding step.
- a controlled system for supplying weft yarn in a loom comprises supply control means of the weft yarn to allow inserting means to insert the weft in the pitch, unwinding means 1 of the weft yarn wound on a reel, measuring and accumulating means 2 of an unwound section of length of the weft yarn.
- the measuring and accumulating means 2 comprise first sliding means 21 adapted to deviate the weft yarn with respect to second sliding means 22.
- the system comprises further measuring and accumulating means 3, 4 of an unwound section of length of the weft yarn adapted to allow that the motion of the unwinding means 1 is approximately constant.
- the unwinding means 1 of the weft yarn wound on a reel, the measuring and accumulating means 2 of an unwound section of length of the weft yarn and the further measuring and accumulating means 3, 4 of an unwound section of length of the weft yarn are connected to a drive 100, 200, 300 controlled by the supply control means of the weft yarn to allow the inserting means to insert the weft in the pitch.
- the further measuring and accumulating means 3, 4 comprise oscillating means 30, 40 adapted to allow accumulating the weft yarn, in strict relationship with the motion of the unwinding means 1 and in strict relationship with the motion of the inserting means of the weft in the pitch.
- the oscillating means 30, 40 comprise at least one oscillating arm 31, 41 with respect to a rotation axis.
- the oscillating arm 31, 41 comprises third sliding means 32, 42 adapted to allow deviating the weft yarn with respect to fourth sliding means 33, 43.
- the oscillating arm 31, 41 is connected to a motor, which moves approximately with a constant torque.
- the oscillating arm 31, 41 moves with a first motion law adapted to allow deviating the weft yarn to be able to follow the speed of the unwinding means 1 and with a second motion law adapted to allow deviating the weft yarn to be able to follow the speed of the inserting means of the weft in the pitch.
- the control means of the system allow actuating a self-learning cycle, without knowing the weaving height, through suitable sensors for detecting the sliding of the weft.
- the measuring and accumulating means 2 comprise at least one oscillating arm with respect to a rotation axis.
- Such oscillating arm comprises the first sliding means 21 adapted to allow deviating the weft yarn with respect to the second sliding means 22.
- the controlled system for supplying weft yarn of the present invention allows obtaining its preset objects.
- the system is particularly useful for unwinding and accumulating weft yarn in a controlled way, in the application of unwinding a weft with a rotating reel.
- the unwinding device unwinds, at a substantially constant speed, the weft from the reel, allowing to accumulate a predefined length of weft available for an insertion in a weaving machine, to inserting members of the machine in a controlled way.
- the system is composed of a motor actuating a reel adapted to unwind the weft yarn, means for measuring the unwound and consumed length adapted to measure the weft yarn, means for accumulating the weft yarn, in the period in which this latter one is not inserted in the pitch by the inserting means adapted to accumulate the weft yarn, electronic means for managing motors and sensors.
- the accumulating means allow making the weft available according to defined modes, starting from a certain instant in which the inserting members are ready to insert the weft.
- Unwinding of the weft yarn from the reel occurs at an optimum speed, depending on the required number of colors and the design.
- the system comprises an unwinding machine equipped with motor operating for unwinding the weft, a measuring device equipped with a sensor and a pressurized or depressurized tunnel adapted to house the weft according to a U-shaped arrangement, thanks to a light-weight mass.
- the weft upon exiting the tunnel, is inserted in an accumulator composed by an oscillating lever and actuated by a servomotor.
- shunts are placed, operating with respect to shunts hinged onto the fixed structure to be able to engage the weft so that this latter one is arranged according to an obliged path during its oscillation.
- a weft-blocking brake is provided at the accumulator outlet, which prevents the weft from being re-accumulated, once having ended the insertion of the weft in the pitch.
- the step of inserting the weaving machines does not take the whole cycle, but ranges from 100° to 270°.
- a solution to the problem of reel inertia is keeping the reel rotating accumulating the weft when this is not inserted in the pitch. It is moreover important to store the weft in an orderly position and without rotations with respect to its own axis, supplying the inserting members in the softest possible way.
- the device allows satisfying the following objectives: optimizing the winding speed of the reel by not being constrained by the insertion step; orderly accumulating the weft; making the weft available in an orderly way, compelling it to follow a well defined path.
- the controlled system can operate in a self-learning mode, according to a motion law adapted to comply with certain space-time coordinates depending on known values of: angular position of the machine and of the inserting members, sensor position, insertion starting and ending positions.
- the motion law of the accumulator is a function of:
- the reel goes on unwinding the weft to make available a further amount of weft.
- the accumulator allows uncoupling the unwinding device from the inserting members of the weft in the pitch.
- the reel unwinding speed, the outlet speed is instead similar, theoretically identical, to the speed of the inserting member. It is important to know that the weft, while it is accumulated and made available, is anyway orderly configured between the moving means of the accumulator and the fixed means of the structure, in order not to assume warped arrangements. This is fundamental to guarantee an always plane insertion with the weft.
- a variation of the device is given by the replacement of the measuring device with a pneumatic tunnel with a further motored arm, which engages the weft operating as dynamometric meter.
- the motor-arm assembly has a driving position defined, detected by the encoder of the servomotor and a driving torque. If the weft tension increases or decreases, the motor will react to keep the maintenance torque constant, performing a weft recovering or unwinding action. These actions are composed of rotations of the motor detected by its encoder, so that the necessary length variation amount will be known. Such information is the one which the electronic means will manage to change the unwinding speed.
- the dynamometric measuring device can replace the accumulator itself when the sum of system inertias, insertion speed, weft resistance, efficiency of the inserting means allow that wide oscillations of this latter one can be managed by all these elements.
- the system will be defined as balanced if the zero accumulation position is reached when the interaction ceases between the inserting members and the weft: different more or less values will activate corrections to the reel unwinding speed.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
- Coating With Molten Metal (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Flexible Shafts (AREA)
Claims (3)
- Gesteuertes Schussfadenzuführsystem in einer Webmaschine, das gesteuerte Schussfadenzuführvorrichtungen, Abwickelvorrichtungen (1) des Schussfadens, der um einen Spinnrocken gewickelt ist, Mess- und Speichervorrichtungen (2) eines abgewickelten Längenabschnitts des Schussfadens enthält, die erste Schiebevorrichtungen (21) enthalten, die dazu dienen, den Schussfaden gegenüber zweiten Schiebevorrichtungen (22) umzulenken, weitere Mess- und Speichervorrichtungen (3, 4) eines abgewickelten Längenabschnitts des Schussfadens,die genannten Abwickelvorrichtungen (1) des Schussfadens, der um einen Spinnrocken gewickelt ist, die genannten Mess- und Speichervorrichtungen (2) eines abgewickelten Längenabschnitts des Schussfadens und die genannten weiteren Mess- und Speichervorrichtungen (3, 4) eines abgewickelten Längenabschnitts des Schussfadens sind mit einem Antrieb (100, 200, 300) verbunden, der durch Steuersysteme der Zuführung des Schussfadens gesteuert wird,die genannten weiteren Mess- und Speichersysteme (3, 4) enthalten Schwenkvorrichtungen (30, 40) in engem Verhältnis mit der Bewegung der genannten Abwickelvorrichtungen (1) und in engem Verhältnis mit der Bewegung der Einlegevorrichtungen des Schussfadens in das Webfach,die genannten Schwenkvorrichtungen (30, 40) enthalten mindestens einen Schwenkarm (31, 41) gegenüber einer Drehachse, der genannte mindestens eine Schwenkarm (31, 41) enthält dritte Schiebevorrichtungen (32, 42), die dazu dienen, die Ablenkung des Schussfadens gegenüber vierten Schiebevorrichtungen (33, 43) zu ermöglichen,und dadurch gekennzeichnet ist, dass mindestens ein Schwenkarm (31, 41) mit einem Motor verbunden ist, der sich annäherungsweise mit konstantem Drehmoment bewegt.
- Gesteuertes Schussfadenzuführsystem gemäß dem vorhergehenden Patenanspruch, das dadurch gekennzeichnet ist, dass sich der genannte mindestens eine Schwenkarm (31, 41) gemäß einem ersten Bewegungsgesetz bewegt, das die Ablenkung des Schussfadens ermöglicht, um die Geschwindigkeit der genannten Abwickelvorrichtungen (1) zu verfolgen, und gemäß einem zweiten Bewegungsgesetz, das die Ablenkung des Schussfadens ermöglicht, um die Geschwindigkeit der Einlegevorrichtungen des Schussfadens in das Webfach verfolgen zu können.
- Gesteuertes Schussfadenzuführsystem gemäß dem vorhergehenden Patenanspruch, das dadurch gekennzeichnet ist, dass die Steuervorrichtungen ermöglichen, durch entsprechende Messsensoren der Schiebebewegung des Schussfadens einen Selbsterlernungszyklus auszuführen, ohne die Höhe der Webmaschine zu kennen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITUB2015A005496A ITUB20155496A1 (it) | 2015-11-11 | 2015-11-11 | Sistema controllato di alimentazione di filo di trama in un telaio |
PCT/IT2016/000263 WO2017081711A1 (en) | 2015-11-11 | 2016-11-10 | Controlled system for supplying weft yarn in a loom |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3374303A1 EP3374303A1 (de) | 2018-09-19 |
EP3374303B1 true EP3374303B1 (de) | 2020-01-08 |
Family
ID=55446947
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16831760.0A Active EP3374303B1 (de) | 2015-11-11 | 2016-11-10 | Gesteuertes system zum zuführen von schussgarn in einer webmaschine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3374303B1 (de) |
IT (1) | ITUB20155496A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020080996A1 (en) | 2018-10-18 | 2020-04-23 | Iro Aktiebolag | Yarn feeding device with learning procedure |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH556929A (de) * | 1972-10-09 | 1974-12-13 | Sulzer Ag | Webmaschine. |
FR2352906A1 (fr) * | 1976-05-25 | 1977-12-23 | Mollon Albert | Dispositif d'alimentation en trame pour les metiers a tisser sans navette |
DE2752094A1 (de) * | 1976-11-24 | 1978-06-01 | Rueti Ag Maschf | Anordnung zum eintragen von schussfaeden |
DE3202229A1 (de) * | 1981-06-25 | 1983-01-13 | Bernd Dipl.-Ing. 8000 München Scheffel | Verfahren und vorrichtung an webmaschinen zum zufuehren des schussfadens |
EP0155432A1 (de) * | 1984-03-23 | 1985-09-25 | GebràDer Sulzer Aktiengesellschaft | Webmaschine |
EP0189497B1 (de) * | 1985-01-28 | 1988-08-24 | GebràDer Sulzer Aktiengesellschaft | Anordnung zum Eintragen von mindestens einem Schussfaden für Webmaschinen |
JPH02264045A (ja) * | 1989-04-04 | 1990-10-26 | Teijin Seiki Co Ltd | 糸の供給方法およびその装置 |
DE19755160A1 (de) * | 1997-12-11 | 1999-06-17 | Iro Ab | Speichervorrichtung |
SE516603C2 (sv) * | 2001-02-16 | 2002-02-05 | Texo Ab | Förfarande och anordning för att längdmäta och magasinera tråd vid väv- eller textilmaskiner |
EP1441053B1 (de) * | 2001-10-01 | 2009-09-09 | Toray Industries, Inc. | Verfahren zur herstellung eines verstärkenden fasergewebes und entsprechende vorrichtung sowie verstärkendes fasergewebe |
DE102005010534A1 (de) * | 2005-03-04 | 2006-09-07 | Ontec Elektro- Und Steuerungstechnik Gmbh | Schussfadenzuführvorrichtung für Webmaschinen, insbesondere Greiferwebmaschinen |
DE102007008150B3 (de) * | 2007-02-19 | 2008-10-16 | Ontec Elektro- Und Steuerungstechnik Gmbh | Verfahren und Vorrichtung zur Fadenzwischenspeicherung |
-
2015
- 2015-11-11 IT ITUB2015A005496A patent/ITUB20155496A1/it unknown
-
2016
- 2016-11-10 EP EP16831760.0A patent/EP3374303B1/de active Active
Non-Patent Citations (1)
Title |
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Also Published As
Publication number | Publication date |
---|---|
EP3374303A1 (de) | 2018-09-19 |
ITUB20155496A1 (it) | 2017-05-11 |
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