CN109642362B - Device and method for catching and stretching weft threads - Google Patents
Device and method for catching and stretching weft threads Download PDFInfo
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- CN109642362B CN109642362B CN201780053905.7A CN201780053905A CN109642362B CN 109642362 B CN109642362 B CN 109642362B CN 201780053905 A CN201780053905 A CN 201780053905A CN 109642362 B CN109642362 B CN 109642362B
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- weft thread
- suction nozzle
- weft
- stretching
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- 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
- D03D47/3066—Control or handling of the weft at or after arrival
- D03D47/308—Stretching or holding the weft
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Abstract
Device for catching and stretching a weft thread (3) inserted into a shed of a weaving machine, comprising a weft thread-stretching device (28), a guide device (25) and a weft thread-holding device (27), which comprises a first suction nozzle (11) which is arranged fixedly on the weaving machine in the extension of the insertion path, which first suction nozzle (11) has an opening (23) directed towards the fabric edge (14) of the fabric (2) and is adapted to generate a suction flow parallel to the beat-up line (10) such that, after the weft thread (3) has been beaten up, the free end of said weft thread (3) held in the first suction nozzle (11) extends at least substantially parallel to the beat-up line (10). A weaving machine with such a device (1) and a method for catching and stretching a weft thread (3).
Description
Technical Field
The invention relates to a device for catching and stretching a weft thread, a weaving machine provided with such a device, and a method for catching and stretching a weft thread.
Background
In order to catch the leading end of a weft thread inserted into the shed (hereinafter also referred to as "inserted weft thread") and to keep the inserted weft thread with a desired tension, it is known from the prior art to use a so-called "hooking thread". The hook-side thread runs parallel to the warp thread next to the shed and can form an individual shed which closes earlier than an ordinary shed via the associated shed-forming member in order to bind (bind) the inserted weft thread at the appropriate moment and with the appropriate tension. By retaining the end portions of the inserted weft threads, weft threads extending beyond the fabric edge after insertion are prevented from being pulled back into the fabric.
WO 2013/117564 a2 discloses a device for catching and stretching a weft thread inserted into a shed of a weaving machine, thereby avoiding hook edges. The device includes: a weft stretching device fixedly arranged on the loom in an extension of an insertion path of the weft for catching a leading end portion of the inserted weft and stretching the caught weft; a weft holding device fixedly arranged on the loom in the region of the beat-up line for holding a leading end portion of at least one beaten-up weft; and a movable guide device arranged on the sley so as to move together with the sley for guiding the caught weft thread towards the weft thread holding device. The weft holding device disclosed in WO 2013/117564 a2 comprises a suction nozzle with a suction opening facing the reed, at which suction opening an inlet slit is provided.
Disclosure of Invention
The object of the invention is to provide a device for catching and stretching a weft thread, a weaving machine provided with such a device and a method for catching and stretching a weft thread, wherein the weft thread is held with sufficient tension until the free end of the weft thread is cut.
This object is solved by a device for catching and stretching a weft thread, a weaving machine comprising such a device and a method for using such a device according to the features of the invention. Preferred embodiments are defined in the present invention.
According to a first aspect, there is provided a device for catching and stretching a weft thread inserted into a shed of a weaving machine, the device comprising: a weft stretching device fixedly arranged on the loom in an extension of an insertion path of the weft for catching a leading end portion of the inserted weft and stretching the caught weft; a weft holding device fixedly arranged on the weaving machine in the region of the beat-up thread for holding a leading end portion of at least one beat-up thread; and a movable guide device arranged on the sley so as to move together with the sley for guiding a weft thread caught towards the weft thread holding device, wherein a first suction nozzle is provided as the weft thread holding device, which first suction nozzle has an opening directed towards a fabric edge of the fabric and is adapted to generate a suction flow parallel to the beat-up line, such that a free end of the weft thread held in the first suction nozzle extends at least substantially parallel to the beat-up line after the weft thread has been beaten up.
The opening of the first nozzle arranged in the region of the beat-up line is directed towards the fabric edge of the fabric. In other words, the opening is at least substantially directed towards the guide channel of the reed if the reed is in its most forward position towards the beat-up line. Thus, the weft thread held by the first nozzle extends at least substantially linearly in the extension of the beat-up thread. This allows good stretching and, if required, advantageous handing over of the weft thread to the tuck-in device, the cutting device and/or the hook edge line arranged at the arrival side of the shed.
In a preferred embodiment, the first nozzle is a ring-shaped spray nozzle. In a circular spray nozzle, the suction operation is obtained by blowing air across the inlet of the nozzle. Preferably, the diameter of the inlet is chosen so as to be sufficiently large to allow the weft thread to easily pass through the nozzle.
In an embodiment, the first suction nozzle can be mounted to the weaving machine in an adjustable position in the region of the beat-up line. In a preferred embodiment, the first suction nozzle is adjustable in its height position perpendicular to the woven fabric and in its position towards and away from the beat-up line. In this case, the position can be adjusted by the operator of the weaving machine, for example depending on the weft thread thickness and/or the type of weaving binder and/or the arrangement of the tuck-in device.
In an embodiment, the guiding means for moving the weft thread towards the first suction nozzle is a blowing means. In other embodiments, the reed acts as a guide. In a preferred embodiment, the guiding means comprise a hook-shaped guiding element, for example provided with a recess having inwardly converging side walls for receiving the weft thread. In an embodiment, the guiding device with the hook-shaped guiding element further comprises an adjustable stop element for adjusting the depth of the recess, as described in WO 2013/117564 a2 (the content of which is incorporated herein by reference).
In an embodiment, a weft detector is provided on the sley, which weft detector acts as a guide device with a guide element for guiding the caught weft thread towards the first suction nozzle. In this case, the number of elements arranged on the sley and which will move during beating-up can be reduced. However, additional guiding elements are provided, for example, when weaving the abrasive weft. In a preferred embodiment, the additional guide element is arranged downstream of the weft thread detector in the insertion direction.
In a preferred embodiment, the weft-stretching device comprises a second suction nozzle, in particular an annular jet suction nozzle, the opening of which is directed towards the guide channel of the reed when the reed is in its most backward position away from the beat-up line. In a preferred embodiment, the second suction nozzle can also be mounted to the weaving machine in an adjustable position. In this case, the position can be adjusted by the operator of the weaving machine, for example depending on the weft thread thickness and/or the type of weaving binder and/or the type of guide device used.
In a preferred embodiment, the first suction nozzle and the second suction nozzle are connected to a control unit, wherein the second suction nozzle is controlled by the control unit such that the second suction nozzle is activated for catching an inserted weft thread when a weft thread is inserted into the shed and deactivated when or shortly after the caught weft thread reaches the first suction nozzle. The deactivation of the second nozzle allows a good transfer of the weft thread from the second nozzle towards the first nozzle.
In an embodiment, the first nozzle is continuously activated. In a preferred embodiment, the first nozzle is controlled by the control unit such that the first nozzle is activated when or shortly before a weft thread caught by the second nozzle moves towards the first nozzle. By deactivating, the air consumption of the suction operation can be significantly reduced. The first nozzle may be deactivated after the front end of the free end has been cut off and removed, or after the free end has been held by means of a hook edge or a clamping or holding element.
In an embodiment, the hook edge line is disposed between the fabric edge and the first nozzle. The hook-edged thread may be used to hold the free end of the inserted weft thread. In a preferred embodiment, a tucking-in device is provided between the textile edge and the first suction mouth for tucking in the free end of at least one weft thread. The tuck-in device is also referred to as selvedge forming device. Preferably, the tucking-in device comprises at least one blowing nozzle adapted to blow onto a free end of at least one weft thread in order to deflect this free end towards a subsequent shed. The tuck-in device may be designed and operated similar to the tuck-in device described in US 6,837,279B 2 (the contents of which are incorporated herein by reference). Such tuck-in devices comprise a hook-shaped element or holder which is provided with a blowing nozzle for blowing the free end of the weft thread into the shed. For a reliable tucking operation, the tucking-in device is preferably mounted to the weaving machine in a positionally adjustable manner.
In a preferred embodiment, a cutting device is arranged between the tucking-in device and the first suction mouth for cutting off the leading end of at least one weft thread before tucking in the remaining part of the free end. The severed leading end may be removed toward a waste container by means of a first suction nozzle. In other embodiments, additional nozzles are provided for removing the severed leading end.
According to a second aspect, a weaving machine is provided, comprising a device for catching and stretching a weft thread as described above. Preferably, the first and second suction nozzles are mounted to the weaving machine in a positionally adjustable manner.
According to a third aspect, a method for catching and stretching a weft thread inserted into a shed of a weaving machine is provided, using a device having: a weft stretching device fixedly arranged on the loom in an extension of an insertion path of the weft for catching a leading end portion of the inserted weft and stretching the caught weft; a weft holding device fixedly arranged on the weaving machine in the region of the beat-up thread for holding a leading end portion of at least one beat-up thread; and a movable guide device arranged on the sley for movement together with the sley for guiding the caught weft thread towards the weft thread holding device, wherein a first suction nozzle is provided as the weft thread holding device, which first suction nozzle has an opening directed towards a fabric edge of the fabric, wherein the first suction nozzle generates a suction flow parallel to the beat-up line such that a free end of the weft thread held in the first suction nozzle extends at least substantially parallel to the beat-up line.
In a preferred embodiment, the weft-stretching device further comprises a second suction nozzle, in particular an annular jet suction nozzle, the opening of which is directed towards the guide channel of the reed when the reed is in its most backward position away from the beat-up line, wherein the second suction nozzle is activated for catching an inserted weft thread when the weft thread is inserted into the shed and deactivated at or shortly after the caught weft thread reaches the first suction nozzle. Preferably, the first nozzle is activated at or shortly before the time when the caught weft thread moves towards the first nozzle.
Drawings
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like elements will be represented by like reference numerals throughout the drawings.
Fig. 1 shows a device for catching and stretching a weft thread mounted to a weaving machine in a top perspective view.
Fig. 2 shows in perspective view from the rear of the weaving machine in the direction of the tuck-in device the device of fig. 1 mounted to the weaving machine for catching and stretching a weft thread.
Fig. 3 shows in perspective view from the back of the weaving machine in the direction of the first suction nozzle the device for catching and stretching a weft thread of fig. 1 mounted to the weaving machine with the sley in the most backward position.
Fig. 4 shows, in a perspective view similar to fig. 3, the device for catching and stretching a weft thread of fig. 1 mounted to a weaving machine from the rear side of the weaving machine in the direction of a first suction nozzle, wherein the sley is in the forwardmost position.
Fig. 5 shows the device for catching and stretching a weft thread of fig. 1 mounted to a weaving machine from the insertion side of the weaving machine in a perspective view after the weft thread has been beaten up and the sley moved towards the most backward position.
Detailed Description
Fig. 1 to 5 show a device 1 for catching and stretching a weft thread mounted to a weaving machine, wherein the weaving machine is only partially shown.
As is generally known, to weave a fabric 2 (see fig. 5), the weft threads 3 are inserted into sheds formed between the planes of the warp threads 4 by selectively raising and lowering the warp threads 4 (see fig. 5). In an air jet weaving machine, during insertion, the weft thread 3 is supported in a known manner by a relay nozzle 5 (see fig. 2) and guided in a guide channel 6 (see fig. 2) of a reed 7, which guide channel 6 determines the insertion path of the inserted weft thread 3. In the embodiment shown, a first weft detector 8 is arranged at the end of the insertion path next to the reed 7 to detect the arrival of the weft thread 3. The reed 7 and the first weft detector 8 are mounted to the sley 9 and can be moved back and forth by means of the sley 9 between a most backward position for inserting a weft thread (as shown in fig. 3) and a most forward position for beating up an inserted weft thread (as shown in fig. 4).
The device 1 for catching and stretching a weft inserted into a shed comprises a weft-stretching device 28 and a weft-holding device 27, said weft-stretching device 28 being fixedly arranged on the weaving machine in the extension of the insertion path, said weft-holding device 27 being fixedly arranged on the weaving machine in the region of the beat-up line 10 (see fig. 5). In the embodiment shown, the first suction nozzle 11 is provided as a weft thread holding device 27 and the second suction nozzle 12 is provided as a weft thread stretching device 28. Both the first nozzle 11 and the second nozzle 12 are designed as annular spray nozzles, wherein the suction operation is obtained by blowing air across the inlet of the nozzles. The inlets or openings 23, 24 of the two suction nozzles 11, 12 are directed towards the fabric edge 14 (see fig. 5), in particular towards the extension of the fabric edge 14. Thus, the two suction nozzles 11, 12 each generate a suction flow parallel to the beat-up line 10. Air for the suction operation is supplied from the supply pipe 13.
Downstream of the second nozzle 12 in the insertion direction, a second weft detector 15 is mounted to the sley 9 for detecting insertion errors.
The first suction nozzle 11 and the second suction nozzle 12 are not mounted on the sley 9. In the embodiment shown, the first suction nozzle 11 and the second suction nozzle 12 are fixedly arranged on the weaving machine by means of a support beam 16 and two mounting plates 17, 18, the two mounting plates 17, 18 being used for mounting the first suction nozzle 11 and the second suction nozzle 12, respectively, to the support beam 16. In this embodiment, the support beam 16 is provided with a setting member 29, which setting member 29 comprises, for example, a slot and a fixing bolt for jointly displacing the two suction nozzles 11, 12 relative to the beat-up line 10. Furthermore, in the illustrated embodiment, similar setting members 30, 31 are provided on the support beam 16 and the mounting plates 17, 18, thereby allowing the position of the mounting plates 17, 18 relative to the support beam 16 to be adjusted individually. In the illustrated embodiment, the mounting plate 17 may be mounted to the support beam 16 in a horizontal position and in a settable vertical position, while the mounting plate 18 may be mounted to the support beam 16 in two horizontal positions and in a settable vertical position. For this purpose, threaded holes are provided in the support beam 16 for the bolts of the setting member 30, and a row of threaded holes 32, into which the bolts of the setting member 31 can be selectively screwed, is provided in the support beam 16. Thus, the position of the first suction nozzle 11 and the position of the second suction nozzle 12 can be adjusted with respect to the support beam 16 and thus with respect to the beat-up line 10 and the guide channel 6 of the reed 7. As shown in fig. 3 and 4, the first suction nozzle 11 is arranged such that the centre axis of its opening 23 at least substantially coincides with the guide channel 6 of the reed 7 when the reed 7 is in its most forward position, and the second suction nozzle 12 is arranged such that the centre axis of its opening 24 at least substantially coincides with the guide channel 6 of the reed 7 when the reed 7 is in its most rearward position. Thus, the first nozzle 11 is also referred to as front nozzle, while the second nozzle 12 is referred to as rear nozzle.
The device 1 shown in fig. 1 further comprises a tucking-in device 19, which tucking-in device 19 is arranged between the fabric edge 14 and the first suction mouth 11 for tucking in a free end of at least one inserted weft thread 3. The tucking-in device 19 comprises a hook-shaped element 20, which hook-shaped element 20 is provided with a blowing nozzle 21 for blowing the free end of the weft thread 3 into the shed. The tucking-in device 19 comprises at least two mutually opposite blowing nozzles 21, which blowing nozzles 21 are arranged at the side of the hook elements 20 facing the fabric edge 14. In the illustrated embodiment, four blowing nozzles 21 arranged in two pairs are provided. The operation and arrangement of the mouthpiece 21 is for example as described in US 6,837,279B 2.
A cutting device 22 is provided between the tuck-in device 19 and the first suction nozzle 11, wherein the cutting device 22 is arranged for cutting off the front end of the inserted weft thread 3 close to the side of the hook-shaped element 20.
As shown in fig. 1 to 3, when the reed 7 is in its most rearward position, the inserted weft thread 3 is caught and pulled by means of a second suction nozzle 12, which second suction nozzle 12 is arranged in the extension of the guide channel 6. The reed 7 is moved by means of a sley 9 towards a beat-up line 10 (see fig. 5) of the fabric 2 for a beat-up movement. The weft thread 3 caught and stretched by the second suction nozzle 12 (as schematically shown in fig. 1) moves together with the reed 7 and the additional guide means 25 towards the beat-up thread 10. The guide means 25 comprise, for example, a hook-shaped guide element 26, which hook-shaped guide element 26 is provided with a recess having inwardly converging side walls for receiving the weft thread 3. In the embodiment shown, the first weft detector 8 arranged on the sley 9 acts as a guide 25 for guiding the caught weft thread 3 towards the first suction nozzle 11, more particularly the first weft detector 8 is provided with a hook-shaped guide element 26 of the guide 25. The hook-shaped guide element 26 may consist of a profiled plate as part of the weft thread detector 8, for example a profiled plate designed as a plate 33 as part of the weft thread detector 15. According to an alternative embodiment, the reed 7 may act as a guide element of a guide device for guiding the caught weft thread 3 towards the first suction nozzle 11 when the reed 7 is moved.
As shown in fig. 4, upon performing the beating-up motion, the weft thread 3 moves into the effective range of the first nozzle 11 and can be transferred to the first nozzle 11. For this purpose, the second suction nozzle 12 is preferably deactivated as soon as the weft thread 3 has entered the effective range of the first suction nozzle 11.
As best shown in fig. 5, after beating up a weft thread, the free end of the weft thread 3 (which is held by the first nozzle 11) extends at least substantially parallel to the beat-up line 10. This allows good stretching of the inserted weft thread 3 and proper operation of the tuck-in device 19. In order to form a selvedge, the front end of the inserted weft thread is cut off and the blowing nozzle 21 of the tuck-in device 19 is activated for deflecting the remaining part of the free end of the inserted weft thread towards the shed, wherein the free end jointly binds with the subsequently inserted weft thread 3 in the fabric 2. The cut end may be conveyed via the first nozzle 11 towards a waste container (not shown).
In a preferred operation, the second suction nozzle 12 is activated for catching an inserted weft thread 3 when the weft thread 3 is inserted into the shed and is deactivated when or shortly after the caught weft thread 3 reaches the effective range of the first suction nozzle 11. The first suction nozzle 11 is activated when or shortly before the caught weft thread is moved towards the first suction nozzle 11 by means of the reed 7 and/or the weft thread detector 8 and/or any other guiding means. After the front end has been cut by means of the cutting device 22 and the cut end has been conveyed towards the waste container, the first suction nozzle 11 can be deactivated.
The activation and deactivation of the first suction nozzle 11, the second suction nozzle 12 and the blowing nozzle 21 of the tuck-in device 19 can be controlled by means of a control unit (not shown), which can be incorporated in a central control unit of the weaving machine.
The device and the method according to the invention are not limited to the embodiments described by way of example and shown in the drawings, but may also comprise variants and combinations of these embodiments which fall within the claims.
Claims (15)
1. Device for catching and stretching a weft thread (3) inserted into a shed of a weaving machine comprising a sley (9) and a reed (7) mounted to said sley (9), wherein said sley (9) is able to move said reed (7) back and forth between a rearwardmost position for inserting the weft thread (3) and a forwardmost position for beating up the inserted weft thread, said device (1) comprising: a weft stretching device (28) fixedly arranged on the loom in the extension of the insertion path of the weft (3) for catching the front end portion of the inserted weft (3) and stretching the caught weft (3); a weft holding device (27) fixedly arranged on the loom in the region of a beat-up thread (10) for holding a leading end portion of at least one beaten-up weft thread; and a movable guide (25) arranged on the sley (9) for moving together with the sley (9) for guiding the caught weft thread (3) towards the weft thread holding device (27), wherein a first suction nozzle (11) is provided as the weft thread holding device (27) and a second suction nozzle (12) is provided as the weft thread stretching device (28), the opening (24) of the second suction nozzle (12) being directed towards the guide channel (6) of the reed (7) when the reed (7) is in its most rearward position away from the beat-up thread (10), characterized in that the first suction nozzle (11) has an opening (23) directed towards the fabric edge (14) of the fabric (2) and thus when the reed (7) is in its most forward position towards the beat-up thread (10), the opening (23) of the first suction nozzle (11) is directed towards the guide channel (6) of the reed (7), and the first suction nozzle (11) is adapted to generate a suction flow parallel to the beat-up line (10) such that, after the weft thread (3) has been beaten up, the free end of the weft thread (3) held in the first suction nozzle (11) extends at least substantially parallel to the beat-up line (10), and the first suction nozzle (11) is connected to a control unit, wherein the first suction nozzle (11) is controlled by the control unit such that the first suction nozzle (11) is activated at or shortly before the weft thread (3) caught by the second suction nozzle (12) moves towards the first suction nozzle (11).
2. Device for catching and stretching a weft thread according to claim 1, characterized in that the first suction nozzle (11) is a ring-shaped spray nozzle.
3. Device for catching and stretching a weft thread according to claim 1 or 2, characterized in that the first suction nozzle (11) is mounted to the weaving machine in an adjustable position in the region of the beat-up thread (10).
4. Device for catching and stretching a weft thread according to claim 1 or 2, characterized in that the guiding means (25) comprise a hook-shaped guiding element (26).
5. Device for catching and stretching a weft thread according to claim 1 or 2, characterized in that a weft thread detector (8) is provided on the sley (9), which weft thread detector acts as the guiding means (25) for guiding the caught weft thread (3) towards the first suction nozzle (11).
6. Device for catching and stretching a weft thread according to claim 1 or 2, characterized in that the second nozzle (12) is a ring-shaped spray nozzle.
7. Device for catching and stretching a weft thread according to claim 1 or 2, characterized in that the second suction nozzle (12) is connected to the control unit, wherein the second suction nozzle (12) is controlled by the control unit such that the second suction nozzle (12) is activated for catching a weft thread (3) inserted when a weft thread (3) is inserted into the shed and is deactivated at the time or shortly after the caught weft thread (3) reaches the first suction nozzle (11).
8. Device for catching and stretching a weft thread according to claim 1 or 2, characterized in that a tuck-in device (19) is arranged between the fabric edge (14) and the first suction nozzle (11) for tucking in the free end of at least one weft thread.
9. Device for catching and stretching a weft thread according to claim 8, characterized in that the tuck-in device (19) comprises at least one blowing nozzle (21) adapted to blow onto a free end of at least one weft thread (3) in order to deflect it.
10. Device for catching and stretching a weft thread according to claim 8, characterized in that a cutting device (22) is arranged between the tucking-in device (19) and the first suction nozzle (11) for cutting the leading end of at least one weft thread (3) before tucking in the remaining part of the free end.
11. Device for catching and stretching a weft thread according to claim 9, characterized in that a cutting device (22) is arranged between the tucking-in device (19) and the first suction nozzle (11) for cutting the leading end of at least one weft thread (3) before tucking in the remaining part of the free end.
12. Device for catching and stretching a weft thread according to claim 4, characterized in that the hook-shaped guide element is provided with a recess having inwardly converging side walls for receiving the weft thread (3).
13. Weaving machine, characterized in that it comprises a device (1) for catching and stretching a weft thread (3) according to any one of claims 1 to 12.
14. Method for catching and stretching a weft thread (3) inserted into a shed of a weaving machine comprising a sley (9) and a reed (7) mounted to said sley (9), wherein said sley (9) is able to move said reed (7) back and forth between a rearwardmost position for inserting a weft thread (3) and a forwardmost position for beating up an inserted weft thread, using a device (1) according to any one of claims 1 to 12, having: a weft stretching device (28) fixedly arranged on the loom in the extension of the insertion path of the weft (3) for catching the front end portion of the inserted weft (3) and stretching the caught weft (3); a weft holding device (27) fixedly arranged on the loom in the region of a beat-up thread (10) for holding a leading end portion of at least one beaten-up weft thread; and a movable guide (25) arranged on the sley (9) for moving together with the sley (9) for guiding the caught weft thread (3) towards the weft thread holding device (27), wherein a first suction nozzle (11) is provided as the weft thread holding device (27) and a second suction nozzle (12) is provided as the weft thread stretching device (28), the opening (24) of the second suction nozzle (12) being directed towards the guide channel (6) of the reed (7) when the reed (7) is in its most rearward position away from the beat-up thread (10), characterized in that the first suction nozzle (11) has an opening (23) directed towards the fabric edge (14) of the fabric (2) and thus when the reed (7) is in its most forward position towards the beat-up thread (10), the opening (23) of the first suction nozzle (11) is directed towards the guide channel (6) of the reed (7), wherein the first suction nozzle (11) generates a suction flow parallel to the beat-up line (10) such that, after the weft thread (3) has been beaten up, the free end of the weft thread (3) held in the first suction nozzle (11) extends at least substantially parallel to the beat-up line (10), and the first suction nozzle (11) is activated at or shortly before the caught weft thread moves towards the first suction nozzle (11).
15. Method for catching and stretching a weft according to claim 14, characterized in that the second suction nozzle (12) is activated for catching a weft (3) inserted into the shed when the weft reaches the first suction nozzle (11) and deactivated at or shortly after the caught weft reaches the first suction nozzle.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE2016/0141A BE1024545B1 (en) | 2016-09-02 | 2016-09-02 | Device and method for catching and stretching weft threads |
| BE2016/0141 | 2016-09-02 | ||
| PCT/EP2017/068962 WO2018041485A1 (en) | 2016-09-02 | 2017-07-27 | Device and method for catching and stretching weft threads |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109642362A CN109642362A (en) | 2019-04-16 |
| CN109642362B true CN109642362B (en) | 2021-08-06 |
Family
ID=56925922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780053905.7A Active CN109642362B (en) | 2016-09-02 | 2017-07-27 | Device and method for catching and stretching weft threads |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3507404B1 (en) |
| CN (1) | CN109642362B (en) |
| BE (1) | BE1024545B1 (en) |
| WO (1) | WO2018041485A1 (en) |
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| BE1020142A3 (en) * | 2011-04-11 | 2013-05-07 | Picanol | THREAD CLAMP FOR A WEIGHT THREAD AT A WEAVING MACHINE. |
| WO2013117564A2 (en) * | 2012-02-08 | 2013-08-15 | Picanol | Device for catching and stretching a weft thread, weaving machine and method for catching and stretching a weft thread |
| CN104822869A (en) * | 2012-10-01 | 2015-08-05 | 必佳乐公司 | Device and method for monitoring a weft thread |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1013428A3 (en) | 2000-05-08 | 2002-01-15 | Picanol Nv | EDGE DEVICE FOR WEAVING MACHINES. |
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2016
- 2016-09-02 BE BE2016/0141A patent/BE1024545B1/en active IP Right Grant
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2017
- 2017-07-27 WO PCT/EP2017/068962 patent/WO2018041485A1/en unknown
- 2017-07-27 CN CN201780053905.7A patent/CN109642362B/en active Active
- 2017-07-27 EP EP17746448.4A patent/EP3507404B1/en active Active
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| CN202030902U (en) * | 2011-04-07 | 2011-11-09 | 建滔（连州）玻璃纤维有限公司 | Two-shear suctioning pipe device of air jet loom |
| BE1020142A3 (en) * | 2011-04-11 | 2013-05-07 | Picanol | THREAD CLAMP FOR A WEIGHT THREAD AT A WEAVING MACHINE. |
| WO2013117564A2 (en) * | 2012-02-08 | 2013-08-15 | Picanol | Device for catching and stretching a weft thread, weaving machine and method for catching and stretching a weft thread |
| CN104220659A (en) * | 2012-02-08 | 2014-12-17 | 必佳乐公司 | Device for catching and stretching a weft thread, weaving machine and method for catching and stretching a weft thread |
| CN104822869A (en) * | 2012-10-01 | 2015-08-05 | 必佳乐公司 | Device and method for monitoring a weft thread |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109642362A (en) | 2019-04-16 |
| EP3507404B1 (en) | 2023-09-06 |
| EP3507404A1 (en) | 2019-07-10 |
| WO2018041485A1 (en) | 2018-03-08 |
| BE1024545B1 (en) | 2018-04-05 |
| EP3507404C0 (en) | 2023-09-06 |
| BE1024545A1 (en) | 2018-03-28 |
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