WO2004029346A1 - Procede pour maintenir un fil de trame et machine a tisser a tuyeres, notamment pour mettre ledit procede en oeuvre - Google Patents

Procede pour maintenir un fil de trame et machine a tisser a tuyeres, notamment pour mettre ledit procede en oeuvre Download PDF

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Publication number
WO2004029346A1
WO2004029346A1 PCT/DE2003/002858 DE0302858W WO2004029346A1 WO 2004029346 A1 WO2004029346 A1 WO 2004029346A1 DE 0302858 W DE0302858 W DE 0302858W WO 2004029346 A1 WO2004029346 A1 WO 2004029346A1
Authority
WO
WIPO (PCT)
Prior art keywords
mixing tube
weft thread
compressed air
clamping device
clamping
Prior art date
Application number
PCT/DE2003/002858
Other languages
German (de)
English (en)
Inventor
Adnan Wahhoud
Markus Gielen
Dietmar Von Zwehl
Valentin Krumm
Dieter Teufel
Original Assignee
Lindauer Dornier Gesellschaft Mbh
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
Priority claimed from DE10244694A external-priority patent/DE10244694B4/de
Priority claimed from DE2002156830 external-priority patent/DE10256830B3/de
Application filed by Lindauer Dornier Gesellschaft Mbh filed Critical Lindauer Dornier Gesellschaft Mbh
Priority to AU2003269683A priority Critical patent/AU2003269683A1/en
Priority to DE50306767T priority patent/DE50306767D1/de
Priority to BR0306435-2A priority patent/BR0306435A/pt
Priority to EP03750288A priority patent/EP1552047B1/fr
Priority to JP2005509654A priority patent/JP2005539161A/ja
Priority to DE10393812T priority patent/DE10393812D2/de
Publication of WO2004029346A1 publication Critical patent/WO2004029346A1/fr

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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
    • D03D47/3006—Construction of the nozzles
    • D03D47/3013—Main nozzles

Definitions

  • the invention relates to a method for holding a weft thread in the mixing tube of the main nozzle of a jet loom, in particular air jet loom, before the weft thread is inserted into a shed formed by warp threads.
  • the weft thread to be entered into the shed is fed from a so-called thread store, also referred to as a pre-winder or pre-winder, to a pneumatically acting main nozzle, which represents a weft insertion means with a predetermined length.
  • the main nozzle has an injector and a mixing tube which picks up a weft thread and holds it there until the weft thread enters the shed.
  • the remaining part of the weft thread is located between the main nozzle and the thread store / pre-winder as well as on the thread store / pre-winder itself and is held there until the weft thread is inserted.
  • the weft thread located in the mixing tube of the main nozzle is kept stretched before its entry with the aid of an air stream which acts in the direction of the longitudinal central axis of the mixing tube.
  • holding air must be blown into the mixing tube in the specified manner during the entire time that the weft thread is held before it is entered into the shed.
  • the actual weft insertion is very short and, depending on the yarn quality, takes place at a pressure of between 1.0 and 6 bar, the pressure of the holding air generally is between 0.1 and 1.5 bar.
  • the time during which the weft thread is held in the mixing tube of the main nozzle may be increased by a multiple, depending on the repeat or pattern, compared to the very short weft insertion time.
  • the pressure of the holding air in the main nozzle compared to normal yarns must be increased further, especially for elastic threads that have a more or less relatively high inherent restoring force, in order to maintain the same constant one To achieve thread tension.
  • a higher pressure in the main nozzle / injector usually leads to higher air consumption.
  • WO 00/52 242 describes a device for inserting weft threads for a weaving machine with at least one nozzle, which has an inflow opening for a pressure medium, which is designed in such a way that the pressure medium experiences a rotation about the longitudinal axis of the nozzle, as a result of which a weft or an additional twist is given in the weft thread in the device.
  • the pressure medium which therefore has a twist, holds the weft thread between the individual wefts for a longer time, in which case excessive rotation should be avoided, since otherwise a fabric of reduced quality would result.
  • the clamping device required for this is arranged in the region of the outlet end of the mixing tube, in which the weft thread passes into the shed.
  • the clamping device can consist, for example, of a slide which can be displaced transversely to the longitudinal direction of the mixing tube as a lifting element and clamps the weft thread located in the mixing tube between the passage opening of the slide and the inner wall of the mixing tube.
  • Another version provides a transversely displaceable stamp which presses the weft thread against the inner wall of the mixing tube.
  • a partial area of the mixing tube is designed as an elastic intermediate piece.
  • the intermediate piece is to be pressed together by two diametrically opposite lifting members when they are moved against each other.
  • the weft thread is then pinched by the compressed elastic intermediate piece.
  • the weft thread is displaced laterally when clamping, that is, it is no longer located in the central longitudinal axis of the mixing tube.
  • This phenomenon is also to be feared in the third embodiment, because only two lifting elements are provided for compressing the elastic intermediate piece, so that the compression is not strictly central symmetrical.
  • a position of the weft thread outside the longitudinal center of the mixing tube causes difficulties in the subsequent insertion of the weft thread into the shed.
  • DE 32 00 638 A1 does not explain in detail how the mechanical actuation of the clamping device should be designed in detail.
  • WO 02/095106 A1 deals with an air jet weaving machine in which a plurality of main nozzles with the associated mixing tubes are combined to form a compact parallel arrangement.
  • This known air jet weaving machine is thus set up for generating weaving patterns and processing multiple colors.
  • the weft threads in the main nozzle and the mixing tube are held here by clamping action until the weft thread in question is released for entry.
  • the clamping devices are arranged between an auxiliary blowing nozzle and a main blowing nozzle, so they are always located at the entrance of the main nozzles and thus outside the mixing tube.
  • the clamping device is also equipped with mechanical clamping members.
  • longitudinally displaceable clamping members designed as pistons or pressure stamps are moved pneumatically. Under the influence of excess pressure, they clamp the associated weft thread against an inner wall of the clamping device, while the resetting of the clamping members and thus the release of the weft threads takes place in that the clamping members are connected to a vacuum source.
  • the invention has for its object to provide a method for holding a weft thread in the mixing tube of the main nozzle of a jet loom, in particular air jet loom, and a jet loom for carrying out the method, with which the amount of holding air required is largely independent of the type and quality of the weft yarns can be significantly reduced or even completely dispensed with holding air, whereby a compact multiple arrangement of main nozzles and mixing tubes is possible, the waste in fabric production is reduced and a negative influence due to holding on the weft yarns is excluded, as well as the overall quality of the fabric produced is increased.
  • this object is achieved by the method according to claim 1 and the jet loom, in particular for carrying out this method, according to claim 8.
  • Another solution is specified in the method according to claim 20 and the jet loom, in particular for carrying out this method, according to claim 24. Refinements of these various independent solutions are the subject of related claims.
  • the first solution according to the invention according to claim 1 thus consists in a method for holding a weft thread in the mixing tube of the main nozzle of a jet loom, in particular air jet loom, before the weft thread is introduced into a shed formed by warp threads, a flexibly designed partial area of the mixing tube being acted upon from the outside by means of a pressure medium is compressed and holds the weft thread clamped.
  • a purely hydraulic or pneumatic actuation takes place in that a pressure medium compresses the flexibly designed partial area of the mixing tube.
  • the weft is clamped; this type of clamping ensures that the weft yarn is not adversely modified. It has been shown that jamming is not critical in this regard, while holding air modifies the yarns relatively quickly and disadvantageously.
  • the compression of the elastic portion of the Mixing tube by direct exposure to a pressure medium allows very low inertia actuation, the associated facilities can be accommodated in a space-saving manner. In addition, mechanical shocks that could lead to vibrations of the mixing tubes during operation are largely avoided with this type of actuation.
  • the clamping takes place essentially in the region of the outlet end of the mixing tube.
  • the method according to the invention advantageously provides that the flexible portion of the mixing tube is deformed so far in the direction of its longitudinal central axis by means of the pressure medium that "the weft thread is clamped in the region of the central longitudinal axis.
  • the known one Jet weaving machine according to DE 32 00 638 A1 two diametrically opposed lifting elements are provided, which cannot compress the flexible and elastic sub-area uniformly, but only irregularly and deformingly, with this type of method there is an exactly centrally symmetrical, uniform compression
  • the clamping device thus forms, so to speak, a central lock that aligns the weft in a centrally symmetrical manner and thus the optimal conditions for entry into the shed Affi.
  • the already very low-inertia actuation according to the method according to the invention is further improved by the fact that, according to a further embodiment, for accelerated release of the clamping and release of the weft thread, the flexible partial region of the mixing tube is placed under negative pressure, controlled from the outside.
  • the flexible section of the mixing tube is controlled for clamping by means of compressed air at an overpressure of less than 2.0 bar and released by means of compressed air at an underpressure of less than - 50.0 mbar.
  • Transitional period between loosening the clamp and the entry in the shed of the weft can still be temporarily held by the inflowing holding air.
  • a certain weft thread is only held with holding air before the entry into the shed when the clamping is open, if it is the next one due to the pattern
  • the weft thread is held with holding air only between the arrival on the catch side of an immediately previously inserted weft thread and the triggering of the pressure pulse before the entry of the next weft thread.
  • This embodiment of the method according to the invention is naturally of the greatest importance in the case of multicolored weft insertion. This is because a certain weft thread can have a longer waiting time if the pattern requires it. During the entire waiting time, the weft thread is thus held by clamping alone. Holding air is not required during this time, and the adverse effects of the holding air on the weft threads by modifying them are also eliminated. Only when a weft thread has been inserted immediately and the entry of the relevant held weft thread is imminent is this weft thread briefly held with holding air in order to bring it into the optimal condition for its entry and a position within the mixing tube that is in the correct position.
  • the weft thread is thus held with a defined clamping force, so that it does not slip out of the main nozzle and nevertheless maintains the optimal position for later entry.
  • the method according to the invention it is possible to weave types of yarn which previously could not be woven or could not be woven easily with jet weaving machines, in particular air jet weaving machines, even for a high-quality fabric.
  • These include, for example, caterpillars and twisted elastic yarn, which can now be processed relatively easily with the method according to the invention, especially in air jet weaving machines.
  • the method can be used particularly advantageously when weft threads of different colors are inserted in order to be able to weave certain patterns.
  • An essential advantage of the method according to the invention is that, according to the pattern repeat, the weft thread is clamped depending on the pattern in the case of several main nozzles, which are generally assigned to each color. The weft thread is kept clamped during its entire "waiting time" for the entry until immediately before its entry.
  • Holding for a short time by means of holding air is only an additional optimization, because with a centrally symmetrical clamping there are already good preconditions for a correct insertion of the weft thread.
  • maintaining a constant thread tension is an important criterion for a high-quality fabric and can be achieved particularly well by holding using holding air.
  • the weft thread receives the necessary thread tension and an optimal position in the mixing tube. Because of the only short exposure time of the holding air in the case of the method according to the invention, wherein holding air is only required when the weft thread is imminent, the disadvantageous modification of the weft thread by the holding air is avoided.
  • a jet weaving machine in particular for carrying out the method according to one of claims 1 to 7, with at least one main nozzle, comprising an injector with a compressed air connection and a mixing tube connected to the injector, with one in the mixing tube Arranged clamping device, which is formed by a flexible portion of the mixing tube and is used to clamp a weft thread located in the mixing tube to the inner wall of the mixing tube, and with a device for loading the flexible portions of the mixing tube by the pressure medium in such a way that the Partial areas when the pressure medium acts on the weft thread under a certain pressure P. be pressed together and return to their original position when the pressure is released.
  • the clamping device is a central lock in the form of a pneumatic or hydraulic muscle.
  • the pneumatic or hydraulic muscle clamps the weft thread essentially in the region of the central longitudinal axis of the mixing tube.
  • the hydraulic or pneumatic muscle comes about because a part of the mixing tube is made of a flexible and highly elastic material.
  • the pressure medium especially compressed air, acts evenly from the outside and centrally symmetrically on the muscle, so that the greatest possible safety results in a clamping in the area of the central longitudinal axis of the mixing tube.
  • the pneumatic or hydraulic muscle is arranged between a first and a second mixing tube section and connects the two mixing tube sections in a sealing manner, the pressure medium acting on the muscle in a chamber surrounding it.
  • the pneumatic or hydraulic muscle can be controlled in such a way that the pressure pulse triggered in the injector of the main nozzle for the insertion of the weft thread releases the clamping action of the clamping device.
  • This training is advantageous because the clamping must be removed anyway before the weft thread is inserted into the shed.
  • the chamber can be connected to a negative pressure source in order to quickly relieve the pressure on the pneumatic or hydraulic muscle.
  • connections required for this can be made via solenoid directional valves, and a vacuum pump can serve as a vacuum source.
  • jet loom according to the invention is provided with a control device which brings about a coordinated interaction in the supply of compressed air from a compressed air source to the injector and the clamping device provided with a pressure sensor, the compressed air serving as pressure medium for the clamping device ,
  • the clamping device can be held in its open position immediately before the weft thread is inserted and that holding air can only be introduced into the mixing tube via the injector when the clamping device is open.
  • the weft thread is held in the by far greatest of its "waiting time” by clamping by means of the pneumatic or hydraulic muscle.
  • the holding air is held only shortly before it is inserted, so that the position and condition of the weft thread optimally matches the entry into the Compared to the state of the art, the risk that the yarns are disadvantageously modified by the holding in is decisively reduced.
  • the weft After the weft has been inserted into the shed, the weft is separated in the direction of entry by means of a cutting device. That happens at a time in which the pressure pulse triggered by the injector of the main nozzle has dropped again to such an extent that the pressure in the chamber surrounding the muscle predominates and the weft thread is clamped again at the clamping point.
  • the choice of the pressure difference between the pressure pulse of the injector and the pressure in the chamber surrounding the muscle is used to control the opening and closing of the clamping device, depending on the property of the elastic tube piece forming the muscle.
  • Such a pressure-balanced or pressure-matched system with regard to the maximum pressure of the pressure emitted by the injector of the main nozzle and the pressure of the pressure medium, which compresses the muscle to hold the weft thread, is particularly suitable for particularly rapidly changing cycles, i.e. in this case weaving cycles, for high-speed air jet weaving machines suitable.
  • the jet loom according to the invention can be modified in an advantageous manner with such a configuration of the control device that the clamping device can be closed shortly before the end of the insertion of the weft thread so that the weft thread can be braked during this phase of its entry, so that it is braked by the Clamping device slips through.
  • This can be achieved by specifically controlling the pressure difference / the pressure differences between the pressure pulse or the shape of the pressure pulse and the pressure or the pressure curve in the chamber surrounding the clamping device.
  • the clamping device then acts as a brake during a time period shortly before the end of the weft insertion.
  • the clamping effect during the gradual braking is controlled via the pressure difference in such a way that the weft thread slips smoothly through the clamping device without being modified itself. It has been shown that the coordination between the pressure or pressure curve in the chamber and the pressure pulse or the shape of the pressure pulse is so fine can be realized that the braking action can be adjusted in an optimized manner depending on the type and quality of the weft thread. This effect occurs without a deterioration in the quality of the tissue. On the contrary, the opposite is the case because the quality of the fabric has been significantly improved compared to an unrestrained entry of the weft thread.
  • a pre-pulse is triggered by the injector, which is detected by the pressure sensor and serves as a trigger for opening the clamp.
  • the amplitude of the pre-pulse is selected such that it is greater than the pressure in the chamber surrounding the muscle by a defined amount, the duration of the pre-pulse corresponding at least to the duration of the insertion of the protective thread.
  • a method for holding a weft thread in the mixing tube of the main nozzle of a jet loom, in particular air jet loom is provided before the weft thread is inserted into a shed formed by warp threads, the weft thread being blown with compressed air blown in from the side against the Inner wall of the mixing tube is clamped.
  • the difference to the first method-related solution is that the compressed air acting no longer effects the clamping via a flexible and elastic section of the mixing tube, but clamps the weft thread directly against the inner wall of the mixing tube.
  • This design according to the invention allows a particularly simple design procedure. By setting the pressure and quantity of the compressed air flowing in from the side, the desired defined holding force can also be set precisely here.
  • the weft thread is also deflected from the longitudinal center of the mixing tube by the lateral clamping of the weft thread on the inner wall of the mixing tube shifted to the side.
  • An advantageous embodiment of this method according to the invention in which at least a part of the weft thread is clamped against the inner wall of the mixing tube with compressed air which is blown in from the side, is therefore that the weft thread is held in the mixing tube without compressed air supply with holding air immediately before its entry into the weaving shed or in accordance with Claims 1 to 3 is held clamped in the region of the central longitudinal axis of the mixing tube.
  • the lateral clamping is thus released immediately before the entry of the weft into the shed, and a return of the weft to the longitudinal center of the mixing tube is achieved by holding with holding air or centrally symmetrical clamping, which ensures optimal conditions for entry into the shed. This is particularly important when filling weft threads of different colors in order to be able to weave certain patterns.
  • the individual weft threads are then clamped depending on the pattern. They are held clamped throughout their "waiting time" for the entry until immediately before the entry. Only after the weft threads have been released are they center-symmetrically clamped or held with holding air if the weft thread in question is to be inserted as the next weft thread, depending on the pattern.
  • the procedure will be such that the length of time in which the weft thread is held by holding air or by clamping in the region of the longitudinal central axis of the mixing tube, the time span between the arrival on the catch side of an immediately previously inserted weft thread and the triggering of the Next weft thread entry.
  • a corresponding jet weaving machine in particular for carrying out this second method according to the invention, is equipped with at least one main nozzle, comprising an injector with a compressed air connection and a mixing tube adjoining the injector, with a clamping device which can be switched on or off in the mixing tube and through which the weft thread coats Compressed air blown in from the side is clamped against the inner wall of the mixing tube, holding air being introduced into the mixing tube when the clamping device is switched off by means of the injector during the period between the arrival on the catch side of an immediately previously inserted weft thread and triggering a pressure pulse for the entry of the next weft thread, while at I connected clamping device compressed air is introduced laterally in the direction of the inner wall of the mixing tube for clamping the weft in a waiting position.
  • the clamping device can be arranged at the end of the mixing tube or even outside of the same, if the structural circumstances so require.
  • the injector can advantageously be controlled via a controllable valve in such a way that holding air can be admitted only shortly before the entry of the respective weft thread provided for entry.
  • This configuration serves to save holding air and to avoid the disadvantageous modification of the weft thread by the holding air.
  • Holding air is only introduced into the mixing tube for as short a time as is necessary for an optimal thread tension and a suitable positioning of the weft thread for the entry.
  • a lateral compressed air connection and an opening opposite this in the wall of the mixing tube can be advantageously provided on the jet loom according to the invention in such a design that the weft thread is pressed at an angle into the opening during the blowing in of compressed air and at one inside edge of the opening of the mixing tube is held clamped by means of the compressed air.
  • Figure 1 shows the basic view of a main nozzle with injector and mixing tube with a clamping device integrated into the mixing tube for clamping a weft thread with a control device, which the clamping of the Matches the weft thread and the triggering of a pressure pulse by the injector;
  • Figure 2 includes the embodiment of a clamping device in the form of a pneumatic / hydraulic muscle in the open position, i. H. in a position in which the weft thread is not pinched by the muscle;
  • FIG. 3 shows a pneumatic hydraulic muscle integrated into the mixing tube in the position in which the weft thread is cut off after it has been inserted and is held by the clamping device;
  • FIG. 4 contains details of a jet loom according to the invention with modified control of the pneumatic / hydraulic muscle, which is shown in its clamped position;
  • FIG. 5 is a representation corresponding to FIG. 4 when the clamping is released.
  • Figure 1 shows the basic structure of a main nozzle with injector 1 and mixing tube 2 and in the mixing tube integrated clamping device 6 and the connection of the clamping device 6 with a control device 13, via which a connection between the control of the injector 1 and the control of the clamping device 6 can be realized.
  • a weft thread 9 is arranged in the main nozzle with the injector 1 and the mixing tube 2 and extends essentially along the longitudinal central axis of the mixing tube 2.
  • the clamping device 6, which is shown enlarged in FIGS. 2 and 3, is integrated in the mixing tube 2 between a first mixing tube section 4 and a second mixing tube section 5.
  • a cutting device 18 is shown in principle.
  • the cutting device 18 is located between the second mixing tube section 5 and the shed 20 shown in plan view, into which the weft thread is to be inserted.
  • the shed 20 is formed by a plurality of warp threads 10.
  • a pressure sensor 7 is connected to the clamping device 6 and is connected to the control device 13 via a signal line 11.
  • the control device 13 controls valves 8, which in turn are connected to a compressed air source 19 and a corresponding air supply via a compressed air line 15 to the clamping device 6 or via a further compressed air line 17 enable a compressed air connection 3, which in turn is connected to the injector 1 of the main nozzle and via which the compressed air is supplied to the injector 1 for the supply of holding air and for the insertion of the weft thread 9.
  • the signal lines 14 and 11 control the time dependence between the closing and opening of the clamping device 6 and the triggering of a pressure pulse for the insertion of the weft thread 9 and the beginning and end of the blowing in of holding air.
  • FIG. 2 shows an enlarged sectional view of the clamping device 6 according to FIG. 1 in the open state.
  • the open state is understood to mean the state in which the clamping device 6 does not clamp the weft thread 9, i. H. releases the weft thread 9 either for entry or during the entry. However, if the weft thread should not yet be inserted due to the pattern, no holding air is blown in, but the weft thread is clamped according to the invention (see FIG. 3).
  • the weft thread 9 extends through the first mixing tube section 4, through the clamping device 6 and through the second mixing tube section 5 along the central longitudinal axis of the mixing tube.
  • the clamping device 6 connects, so to speak, an airtight mixing tube divided into two by the mixing tube sections 4 and 5.
  • the clamping device is designed in such a way that in the area of the clamping the wall of the mixing tube 2 is designed so flexibly as a flexible piece of hose that the wall when acted upon by a pressure medium, represented by the arrow in the direction of the inlet into the clamping device 6, is compressed with the pressure P or returns to its original position when the pressure is released.
  • the pressure P m prevails inside the mixing tube.
  • the flexible wall of the clamping device is designed as a pneumatic or hydraulic muscle 16.
  • This pneumatic or hydraulic muscle 16 is surrounded by the chamber 12, into which the pressure medium with the pressure P is introduced into the clamping device 6 via the compressed air line 15 (FIG. 1).
  • the pressure medium deforms at a correspondingly increased pressure (P> P m ) the flexible wall of the pneumatic or hydraulic muscle in the direction of the central longitudinal axis of the mixing tube and thus on the weft thread 9.
  • the pressure sensor 7 is connected to the chamber 12, which is connected via the signal line 11 is connected to the control device 13 (see FIG. 1).
  • the controlled supply of the pressure medium from the pressure source 19 takes place or the supply of pressure medium is interrupted, depending on the state of the clamping device 6, ie clamping of the weft thread 9 or releasing the same, depending on the time from triggering a pressure pulse from the injector 1 of the main nozzle to Entering the weft 9 in the shed 20 to get.
  • the compressed air supply to the injector 1 takes place via the compressed air line 17.
  • Fig. 3 shows the state of the clamping device 6, in which the pressure of the pressure medium P in the chamber 12 is greater than the internal pressure P m in the mixing tube, so that the flexible wall of the pneumatic or hydraulic muscle 16 in the direction of the central longitudinal axis of the mixing tube 2 is deformed to such an extent that the weft thread 9 is securely clamped centrally so that its thread tension is maintained in the desired manner in the region of the first mixing tube section 4.
  • the section of the weft thread which is separated by means of the cutting device 18 (not shown in FIG. 3) and is located in the second mixing tube section 5 then lies against the inner wall of the second mixing tube section 5 without tension.
  • the clamping device 6 with the muscle 16 is relatively close to the interface, that is to say at the front end of the weft thread in the entry direction, and since holding air is largely avoided with the clamping device, i.e. thread modification in the immediate clamping area essentially does not occur, the quality of the Fabric high and waste low. Only the part of the weft thread which is essentially in the first mixing tube section 4 and has an essentially constant thread tension is woven into the finished fabric later, so that otherwise varying thread tensions causing quality differences in the fabric are avoided.
  • the gas-tight connection between the first mixing tube section 4 and the second mixing tube section 5 is achieved by an annular collar 21 in the form of a union nut in connection with an O-ring seal 22, which is screwed onto the housing of the clamping device 6 in the axial direction, so that the screwing of the ring collar 21 pressed the seal 22 and thus its sealing effect is achieved.
  • FIGS. 4 and 5 show the modified control of a jet loom designed according to the invention. Those parts which remain unchanged from the previously described embodiment are designated with the same reference numerals as before.
  • a magnetic directional control valve is used to actuate the pneumatic / hydraulic muscle 16
  • Chamber 12 of the clamping device 6 connects to an overpressure source 25.
  • the pneumatic / hydraulic muscle 16 that is to say the flexible and highly elastic, is thereby formed Part of the mixing tube, compressed symmetrically and evenly in the direction of the longitudinal central axis of the mixing tube 2 and clamps the weft 9.
  • the solenoid directional control valve 23 is reversed and thereby connects the chamber 12, the pressure line 26 and the connection instruction 27 to a vacuum source 28. This results in a rapid pressure relief of the pneumatic / hydraulic muscle 16. The acceleration of the release process leads to the fact that the weft thread 9, which then immediately starts to move, can no longer drag along the flexible and highly elastic wall of the muscle 16. Damage to the muscle 16 is thereby avoided even after a long period of operation.

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  • Textile Engineering (AREA)
  • Looms (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

L'invention concerne un procédé permettant de maintenir un fil de trame (9) dans la zone d'une filière principale de machine à tisser à tuyères, notamment une machine à tisser à tuyères d'air, comportant en particulier une duite multicolore, avant l'insertion d'un fil de trame (9) dans une foule (20) formée par des fils de chaîne (10). Selon ce procédé, le fil de trame (9) est fixé par serrage après un injecteur (1) dans le tube mélangeur de la tuyère principale, dans le sens d'insertion et n'est libéré que peu de temps avant l'insertion, lorsqu'une impulsion de pression est initiée par la tuyère principale, pour l'insertion du fil de trame (9). Pour assurer la commande de la machine à tisser à tuyères correspondante, un dispositif de serrage (6) comprend un capteur de pression (7) qui est relié par l'intermédiaire de lignes de signaux (11) et (14), ainsi que par l'intermédiaire de conduites d'air comprimé (15) et (17), à une source d'air comprimé (8), à une commande de machine (13), à des soupapes (8) et à une alimentation en air comprimé (3) de l'injecteur (1). Le dispositif de serrage (6) se trouve entre une première section de tube mélangeur (4) et une seconde section de tube mélangeur (5), auxquelles se raccorde un dispositif de coupe (18). L'invention concerne en outre un procédé selon lequel la section de fil de trame est fixée par serrage, mais l'air de retenue n'est injecté que pendant la période comprise entre l'arrivée côté réception d'un fil de trame (9) inséré immédiatement avant et le déclenchement de l'impulsion de pression pour l'insertion du prochain fil de trame requis en fonction du dessin, lorsque le serrage est suspendu.
PCT/DE2003/002858 2002-09-18 2003-08-28 Procede pour maintenir un fil de trame et machine a tisser a tuyeres, notamment pour mettre ledit procede en oeuvre WO2004029346A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AU2003269683A AU2003269683A1 (en) 2002-09-18 2003-08-28 Method for holding a weft yarn, and a jet weaving machine, particularly serving to carry out this method
DE50306767T DE50306767D1 (de) 2002-09-18 2003-08-28 Verfahren zum halten eines schussfadens und d senwebmaschine , insbesondere zur durchf hrung des verfahrens
BR0306435-2A BR0306435A (pt) 2002-09-18 2003-08-28 Processo para retenção de um fio de trama e fieira, especialmente para a realização do processo
EP03750288A EP1552047B1 (fr) 2002-09-18 2003-08-28 Procede pour maintenir un fil de trame et machine a tisser a tuyeres, notamment pour mettre ledit procede en oeuvre
JP2005509654A JP2005539161A (ja) 2002-09-18 2003-08-28 よこ糸の保持方法及び特に同方法の実施のためのジェットルーム
DE10393812T DE10393812D2 (de) 2002-09-18 2003-08-28 Verfahren zum Halten eines Schussfadens und Düsenwebmaschine, insbesondere zur Durchführung des Verfahrens

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE10243404 2002-09-18
DE10243404.2 2002-09-18
DE10244694.6 2002-09-24
DE10244694A DE10244694B4 (de) 2002-09-18 2002-09-24 Verfahren zum Halten eines Schussfadens im Bereich einer Hauptdüse einer Düsenwebmaschine sowie Düsenwebmaschine zur Durchführung des Verfahrens
DE2002156830 DE10256830B3 (de) 2002-12-04 2002-12-04 Verfahren zum Halten und Freigeben eines Schussfadens im Bereich der Hauptdüse einer Düsenwebmaschine, insbesondere Luftdüsenwebmaschine und Luftdüsenwebmaschine zur Durchführung des Verfahrens
DE10256830.8 2002-12-04

Publications (1)

Publication Number Publication Date
WO2004029346A1 true WO2004029346A1 (fr) 2004-04-08

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Application Number Title Priority Date Filing Date
PCT/DE2003/002858 WO2004029346A1 (fr) 2002-09-18 2003-08-28 Procede pour maintenir un fil de trame et machine a tisser a tuyeres, notamment pour mettre ledit procede en oeuvre

Country Status (7)

Country Link
EP (1) EP1552047B1 (fr)
JP (1) JP2005539161A (fr)
AT (1) ATE356237T1 (fr)
AU (1) AU2003269683A1 (fr)
BR (1) BR0306435A (fr)
DE (2) DE10393812D2 (fr)
WO (1) WO2004029346A1 (fr)

Cited By (3)

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Publication number Priority date Publication date Assignee Title
EP1598461A1 (fr) * 2004-05-19 2005-11-23 NV Michel van de Wiele Pince à fil de trame à commande pneumatique pour machine à tisser
CN105671750A (zh) * 2016-04-15 2016-06-15 苏州市丹纺纺织研发有限公司 一种发条式捕纬器
CN105671751A (zh) * 2016-04-15 2016-06-15 苏州市丹纺纺织研发有限公司 一种滑动定位式捕纬器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008144336A (ja) * 2006-12-12 2008-06-26 Sultex Ag 横糸を挿入するための方法及び装置
JP5356950B2 (ja) * 2009-08-25 2013-12-04 株式会社豊田中央研究所 エアジェットルームにおける緯糸把持装置

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Publication number Priority date Publication date Assignee Title
DE3200638A1 (de) * 1981-01-13 1982-08-12 Rueti Te Strake Bv Schuetzenlose webmaschine
US4915144A (en) * 1987-06-25 1990-04-10 Sulzer Brothers Limited Delivering yarns with an excess length from a yarn store in an air jet multicolor loom
JPH11200193A (ja) * 1998-01-20 1999-07-27 Toyota Autom Loom Works Ltd ジェットルームにおける緯糸把持装置
WO2002095106A1 (fr) * 2001-05-21 2002-11-28 Picanol N.V., Naamloze Vennootschap Dispositif et procede d'introduction des fils de trame dans une machine a tisser et pince a fil correspondante

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
DE3200638A1 (de) * 1981-01-13 1982-08-12 Rueti Te Strake Bv Schuetzenlose webmaschine
US4915144A (en) * 1987-06-25 1990-04-10 Sulzer Brothers Limited Delivering yarns with an excess length from a yarn store in an air jet multicolor loom
JPH11200193A (ja) * 1998-01-20 1999-07-27 Toyota Autom Loom Works Ltd ジェットルームにおける緯糸把持装置
WO2002095106A1 (fr) * 2001-05-21 2002-11-28 Picanol N.V., Naamloze Vennootschap Dispositif et procede d'introduction des fils de trame dans une machine a tisser et pince a fil correspondante

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1598461A1 (fr) * 2004-05-19 2005-11-23 NV Michel van de Wiele Pince à fil de trame à commande pneumatique pour machine à tisser
BE1016052A3 (nl) * 2004-05-19 2006-02-07 Wiele Michel Van De Nv Pneumatische stuurbare inslagdraadklem voor een weefmachine.
US7219702B2 (en) 2004-05-19 2007-05-22 N.V. Michel Van De Wiele Pneumatically controllable weft thread clamp for a weaving machine
CN105671750A (zh) * 2016-04-15 2016-06-15 苏州市丹纺纺织研发有限公司 一种发条式捕纬器
CN105671751A (zh) * 2016-04-15 2016-06-15 苏州市丹纺纺织研发有限公司 一种滑动定位式捕纬器
CN105671750B (zh) * 2016-04-15 2017-12-01 苏州市丹纺纺织研发有限公司 一种发条式捕纬器
CN105671751B (zh) * 2016-04-15 2019-09-13 苏州市丹纺纺织研发有限公司 一种滑动定位式捕纬器

Also Published As

Publication number Publication date
ATE356237T1 (de) 2007-03-15
EP1552047A1 (fr) 2005-07-13
JP2005539161A (ja) 2005-12-22
BR0306435A (pt) 2004-10-26
AU2003269683A1 (en) 2004-04-19
DE50306767D1 (de) 2007-04-19
EP1552047B1 (fr) 2007-03-07
DE10393812D2 (de) 2005-08-11

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