US20180179675A1 - Weaving Machine - Google Patents
Weaving Machine Download PDFInfo
- Publication number
- US20180179675A1 US20180179675A1 US15/736,482 US201615736482A US2018179675A1 US 20180179675 A1 US20180179675 A1 US 20180179675A1 US 201615736482 A US201615736482 A US 201615736482A US 2018179675 A1 US2018179675 A1 US 2018179675A1
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- US
- United States
- Prior art keywords
- arrangement
- weft
- weft thread
- weaving machine
- fabric
- 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.)
- Abandoned
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Classifications
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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
- D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D49/00—Details or constructional features not specially adapted for looms of a particular type
- D03D49/04—Control of the tension in warp or cloth
- D03D49/20—Take-up motions; Cloth beams
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- 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
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- D03D15/0088—
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
- D03D15/44—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads with specific cross-section or surface shape
- D03D15/46—Flat yarns, e.g. tapes or films
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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
- D03D47/34—Handling the weft between bulk storage and weft-inserting means
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
- D03J1/00—Auxiliary apparatus combined with or associated with looms
- D03J1/007—Fabric inspection on the loom and associated loom control
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
- D03J1/00—Auxiliary apparatus combined with or associated with looms
- D03J1/22—Temples
- D03J1/223—Temples acting on the full width of cloth
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- D03D2700/1472—
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
- D03J2700/00—Auxiliary apparatus associated with looms; Weavening combined with other operations; Shuttles
- D03J2700/06—Auxiliary devices for inspecting, counting or measuring
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Abstract
A weaving machine with a shedding arrangement (10, 25) for forming loom sheds (3) between warp threads (1) drawn off from a thread supply (9), a weft insertion arrangement (20) for inserting weft threads (2) in the form of tapes into the formed loom sheds (3), and a drawing-off arrangement (30) for drawing off the woven fabric (4) formed by warp and weft threads (1, 2) after a weft thread insertion. The weaving machine encompasses a measuring arrangement (40) for detecting geometric parameters, especially the width, of a weft thread (2) before its insertion in the loom shed (3), as well as an evaluating arrangement (45) for evaluating the detected measurement results. A control arrangement (50) for controlling a motion of the woven fabric (4), including the drawing-off, based on the evaluated measurement results, is present on the weaving machine and is connected with the drawing-off arrangement (30).
Description
- The present invention relates to a weaving machine for processing tape-shaped weft threads—that is to say relatively wide and flat band-shaped textile units, according to the preamble of the
claim 1. In this regard, the shedding arrangement or device, the weft insertion arrangement or device, as well as the essential parts of a drawing-off arrangement or device are known devices on weaving machines. The construction of a woven fabric of warp and weft threads in the form of tapes, for example of carbon or glass fiber tapes, is also known for some time. Such tapes are produced, for example, of carbon ravings, which are solidified with an impregnation in the spread-out, parallelized condition. The width of such tapes amounts to e.g. a few millimeters to more than one centimeter. Woven fabrics of carbon tapes are utilized, for example, for lightweight construction applications in the aircraft or motor vehicle field. - Herein both the terms “weft thread” as well as “tape” are used, because the invention relates to the insertion of weft threads in the form of tapes.
- Any desired threads can be used for the warp threads, for example also wide and/or thick threads, preferably however threads in the form of tapes.
- For the insertion of weft threads in the form of tapes into an opened loom shed formed by lifted and lowered warp threads, gripping and clamping devices are provided, which grip or grasp the forward tape end either from the insertion side or coming from the opposite side (through the open loom shed), and pull it through the loom shed.
- In the embodiment according to
EP 1 838 911 A1, the inserted tape is clamped in thread clamps at both sides of the loom shed and is transported against the rear fabric edge or against the binding or interlacing point of the woven fabric by movement of these thread clamps by a fixedly prescribed path distance in the weaving or drawing-off direction (machine direction). Because only the outer ends of the tape-shaped weft thread are grasped and transported in the direction toward the fabric rear edge, in the method described in theEP 1 838 911 A1, in principle the danger exists that the tapes are brought against the fabric rear edge not absolutely straight or linearly over the weaving width, but rather that the area of the weft tapes lying at the center of the woven fabric forms a curve in the fabric plane. In the weaving machine according toEP 1 838 911 A1, it is attempted to reduce this effect in that the warp threads extend through the weaving machine in the vertical direction, whereby the weft tapes are similarly arranged with their width direction extending vertically and are inserted into the loom shed above the already existing fabric rear edge. The transport of the inserted tape-shaped weft treads to the fabric rear edge is thus supported by the gravity acting on the tapes. - The
DE 10 2011 009 765 B3 discloses an apparatus and a method in which the woven fabric is moved back in the direction toward the just-inserted tape-shaped weft thread by a prescribed path distance contrary to the weaving direction, until the front longitudinal edge of the tape and the rear fabric edge lie in contact against one another. - In both cases, after the weft insertion, there follows a crossing-over of the warp threads with the weft threads by closing and opening the loom shed with the aid of the shed forming arrangement. The woven fabric which is now lengthened by one tape width is moved further or drawn off a small distance, in order to achieve space for the next weft insertion.
- It can be disadvantageous in thusly produced woven fabrics, that after the weft insertion the subsequent positioning of the tape-shaped weft threads with respect to the fabric rear edge takes place independently of the actual momentary geometry of the tape.
- In practice, tapes with widths of for example 20 mm to 50 mm also come into use. Such tapes have—caused by the manner of production—a certain—no longer negligible—spreading or scattering in the width over the length of the tape.
- For certain application purposes it can also be advantageous, to use tape-shaped weft threads with purposely selected differing widths within one woven fabric in alternation or in a prescribed sequence.
- There are also woven fabrics in which a certain predefined spacing distance shall remain between successive tape-shaped weft threads. With a varying or fluctuating width of the tapes, the danger exists that this spacing distance also does not uniformly comprise the predefined value.
- The
EP 1 838 911 A1 discloses an apparatus with sensors that measures the width of the tapes in the weaving operation. Dependent on the measured width, special feed or supply devices for the warp threads are actuated in such a manner so that the winding-up of the woven fabric can take place in a tensionless manner or even with an excess of warp threads. An exact positioning of the longitudinal edge of the tape-shaped weft threads without spacing, or with a prescribed spacing to the rear fabric edge dependent on different widths of the tape-shaped weft threads, is thereby not possible. - It is the object of the present invention to provide a weaving machine in which the fabric formation through use of tape-shaped weft threads can be adapted to various different geometric parameters of the tapes, especially to various different widths.
- This object is achieved by the features of the
claim 1. In this solution, the advantages are especially seen in that the actual width and especially the width fluctuations of the tapes to be inserted into the woven fabric can be taken into consideration, because the tape and the woven fabric can be moved toward one another, on the basis of the evaluated measurement results, with a varying—and not according to the prior art with a fixedly prescribed—motion or distance feed advance. Thereby, for example, a tighter or more-closed fabric appearance can be obtained, for example in the case that the momentary width of the tape to be inserted should be reduced. - Overall, through the invention, the flexibility for the weft insertion is increased considerably, because on the basis of the evaluated measurement results, commands for the weaving feed advance can be given via the control arrangement to the drawing-off arrangement, which commands take into consideration the respective actual tape width.
- Alternatively, but preferably in addition to the width detection, the measuring arrangement is embodied for the detection of other geometric measured values, for example of holes and/or splices in the weft thread, whereby the latter arise due to separations of individual or several filaments out of the tape composite.
- According to an advantageous embodiment of the invention, the measuring arrangement is based on an optical measuring method. In this regard, it can especially involve an optically scanned measuring field which preferably extends over the width of the tape. A corresponding measuring arrangement is, for example, an optical precision micrometer.
- According to an alternative, the measuring arrangement works acoustically, especially with the aid of ultrasound. Depending on the wave propagation of the ultrasound, a conclusion can be reached about the width of the scanned tape.
- Also conceivable is a line camera with combined pattern recognition software.
- A further measuring method is based, for example, on a tactile—and thus not contactless—probing or scanning of the weft thread (tape) to be inserted.
- Especially preferably, the measuring arrangement is embodied in such a manner so that the width of the weft thread to be measured is continuously detected before and/or during its insertion. In this manner, a continuous measurement is possible, in which all fluctuations relating to the tape width can be detected. Thereby, the corresponding evaluation possibilities are considerably expanded.
- The measuring arrangement according to the invention is preferably arranged in such a manner so that it is able to measure the width values of the next to be inserted and/or the momentarily inserted weft thread, whereby the measurement can be carried out on the moving weft thread over the entire length to be inserted. Through this measurement, directly following after the weft insertion on the basis of the evaluated measurement, the woven fabric can be moved against this tape by a motion or path distance dependent on the evaluation result.
- Thereafter, the woven fabric including the previously inserted tape is advanced in the warp direction. For these transport processes, a drivable drawing-off roll and advantageously also a woven fabric clamp are provided as part of the drawing-off arrangement. The fabric clamp is advantageously arranged in the area of the fabric rear edge extending in the weft direction, and during the fabric's sliding displacement prevents a sliding displacement of the tape-shaped weft threads last inserted into the woven fabric.
- In the case that the abovementioned relative motion of the tape and the fabric toward one another is not carried out (for example because the spacing distance between tape and fabric is already as desired), the drawing-off arrangement can further move or advance the fabric including the previously inserted tape immediately in the drawing-off direction by a distance dependent on the evaluation result.
- For producing a reversing fabric sliding displacement it is advantageous to provide an oscillating or swinging motion of deflecting rolls intermediately positioned in the warp thread path or in the fabric path, instead of a reversible rotation of the drawing-off roll. In this case, the drawing-off arrangement encompasses an oscillatingly or swingingly supported and reversibly drivable deflecting roll that is arranged in the fabric path between the loom shed or between the fabric clamp and the drivable drawing-off roll.
- Preferably the measuring arrangement is arranged on the insertion side of the weft thread or tape, and in this regard is advantageously oriented in the warp thread direction, i.e. transversely or perpendicularly to the weft thread direction. Thus the measuring arrangement can be accommodated also in a limited or cramped space and is nonetheless in the position to reliably detect the entire width of the weft threads.
- Alternatively, the measuring arrangement is arranged below and above the warp threads, and in this regard advantageously in the area of that fabric longitudinal edge that is first crossed by the tape during the weft insertion. In this manner, the tape that is just now pulled through the loom shed can be measured with regard to its width nearly over its entire length.
- The evaluating arrangement is preferably embodied in such a manner so that it is able to calculate the minimum width and/or the maximum width of the weft thread to be inserted. These extreme values can be determined in a simple manner from all detected measurement data for one weft thread, in order to correspondingly actuate the drawing-off arrangement depending on the desired fabric image, for example for producing a desired constant spacing between the respectively successive weft threads. For this, the maximum width of the current weft thread is determined, and the fabric transport in the forward direction (if applicable with previous transport in the rearward or reverse direction toward the tape) is adjusted corresponding to the desired spacing distance.
- Alternatively or additionally, the evaluating arrangement is advantageously embodied in such a manner so that it is able to calculate a mixed value based on several measured values of a weft thread to be inserted or that has been inserted, especially the width average value thereof. With the use of this average value, the drawing-off arrangement can be actuated in such a manner so that a uniform optical weaving pattern with a spacing of the current last-inserted weft thread or tape to the fabric rear edge, is obtained, wherein this spacing is adapted to the said average value. In this regard, this spacing can also be adjusted so that the applicable weft thread lies against the fabric rear edge corresponding to the determined mixed value, depending on the width fluctuations of the tape and the contour of the rear fabric edge, if applicable with gaps.
- Alternatively to, or following on, a relative motion of the last inserted weft thread and the fabric, before insertion of the next weft thread, the fabric can be moved further by means of the actuated drawing-off arrangement in such a manner so that the next weft thread is inserted, over its entire weft length, without any gap formation with the fabric rear edge or with a spacing distance to the fabric rear edge.
- In the presence of width fluctuations of the tape, fabric images are also realizable in which the tapes with both of their longitudinal edges contact against the neighboring tapes in certain regions, while narrower tape sections form corresponding gaps.
- Advantageously the evaluating arrangement and/or the control arrangement are embodied and configured in such a manner at least to stop the further weft insertion and the drawing-off arrangement and/or to output a prescribed signal upon exceeding and/or falling below prescribed weft thread widths. The evaluating unit and/or the control arrangement are thus preferably in the position to stop the weaving process based on determined extreme values with respect to the tape width, and thereby to avoid a faulty production.
- Comparably to this, the evaluating arrangement is preferably embodied in such a manner so that it is able to recognize faults of the weft to be inserted, for example holes and/or splices, in order to trigger a prescribed action of the weaving machine in its such case. Such an action can for example be the stopping of the weft insertion arrangement and/or the outputting of a signal, for example in order to summon machine operating personnel.
- In the following the invention will be described in further detail in connection with an example embodiment. It is shown by:
-
FIG. 1 a schematic top plan view onto a weaving machine, -
FIG. 2 a schematic view of the weaving machine according toFIG. 1 from the supply side of the warp threads, -
FIG. 3 a schematic cross-section through the weaving machine according toFIGS. 1 and 2 with a view direction in the weft direction. - In
FIGS. 1, 2 and 3 , a weaving machine for warp and weft threads in the form of tapes is schematically illustrated. The tapes consist, for example, of carbon and/or glass fibers. Such a weaving machine is also termed a tape weaving machine. The embodiment of the weaving machine described here can alternatively also be used for such woven fabrics in which merely the weft threads are present in the form of tapes, while the warp threads are utilized in a typical thread form, preferably however in the form of coarse, that is to say thick and/or wide threads. -
Several warp threads 1 running next to one another are provided inrotating supply bobbins 9 and are transported in the warp direction 6 (also named the machine direction or the weaving direction) to a sheddingarrangement warp threads 1 are threaded-through. The heddles are preferably inserted or combined together in heald frames 25—schematically illustrated as frames—and are alternately lifted or lowered with the aid of adrive 11, so that thewarp threads 1 guided through the heddles form a loom shed 3 between themselves in a known way and manner. When one half of thewarp threads 1 are deflected in their upper maximum position and the other half are deflected in their lower maximum position, aweft thread 2 can be guided through the thusly formed loom shed 3. - For supplying the
weft thread 2, present as a tape, a supply bobbin orspool 7 rotating about arotation axis 8 is provided, which supplybobbin 7 is located on one side of the weaving machine. Thewarp threads 1 can alternatively, instead of thesupply bobbin 9, also be provided on a common supply arrangement, e.g. a warp beam. - For insertion of a
weft thread 2 into a loom shed 3, a weft insertion arrangement ordevice 20 is provided, which encompasses adrive 22, a gripper rod orrapier 24 connected with thedrive 22, and agripper head 23 provided on the free end of thegripper rod 24. Thegripper rod 24 is drivable by means of thedrive 22 back and forth through the opened sheds 3. Instead of agripper rod 24 it is alternatively also possible to use a gripper band or tape, which, however, under certain circumstances must be guided on its path through the loom shed. - Before the weft insertion, first the
weft thread 2 that has been prepared or presented from theweft thread bobbin 7 is tightly held in the area of its free end by means of a clamping and cutting arrangement ordevice 21 that is only schematically illustrated, whereupon thegripper head 23 drives or moves through the loom shed 3 and grasps and clamps this free end of theweft thread 2. On its part, the clamping and cuttingarrangement 21 lets go the free end of theweft thread 2, so that thegripper head 23 can pull theweft thread 2 through the loom shed 3. Then the loom shed 3 is closed in that thewarp threads 1 are moved downwards or upwards respectively. Moreover, the clamping and cuttingarrangement 21 clamps theweft thread 2 on the side of theweft thread bobbin 7 and separates the previously insertedweft thread 2 from theendless weft thread 2 supplied from theweft thread bobbin 7. - In
FIG. 2 , the loom shed 3 is schematically illustrated from the rear side of the weaving machine, which loom shed 3 is formed bywarp threads 1 that are alternately moved up and down, so thatweft thread 2 subsequently or followingly supplied from theweft thread bobbin 7 can be conveyed through the loom shed 3. For clamping and releasing, the clamping jaws of thegripper head 23 comprise apivot point 29 that is only schematically indicated. Of course, purely linear motions of the clamping jaws of thegripper head 23 are also conceivable. Clamping and releasing of the clamping jaws can occur, for example, with the aid of a mechanical control arrangement that is arranged outside of the loom shed; however pneumatic or electro-mechanical control arrangements are also possible. - In an alternative that is not illustrated, the
weft thread 2 is gripped by a gripper that is previously not driven or moved through the loom shed in the direction of the weft thread, but rather is arranged on the side of the weft thread bobbin, there grasps the weft thread end, transports it through the loom shed, lets go the weft thread, and then moves back in the direction of the weft thread bobbin without the weft thread. - The inserted
weft thread 2 is still to be bound onto thewoven fabric 4. For this purpose, before or during the closing of the loom shed 3, the fabric rear edge or the binding orinterlacing point 5 with thewoven fabric 4 is moved in the direction toward the insertedweft thread 2. For this, thewoven fabric 4 over its entire width is pushed contrary to thewarp direction 6 by a rearward or reversepath distance 38 to the previously insertedweft thread 2, until, for example, the fabricrear edge 5 lies in contact on the longitudinal edge of the saidweft thread 2. Preferably in that regard, thewoven fabric 4 is clamped by means of afabric clamp 36 driven by a drive 35 (seeFIGS. 1 and 3 ). Next, the clamping by thefabric clamp 36, which exists if applicable, is released, and this clamp is pushed or advanced still further contrary to thewarp direction 6 so far that thefabric clamp 36 can also grasp and clamp the saidweft thread 2. Next thefabric clamp 36 together with the clampedwoven fabric 4 is moved in thewarp direction 6 by theforward path distance 39 so that the next loom shed 3 can be formed. - The thereby constantly growing woven
fabric 4 is rolled or wound up on a drawing-off roll 32 that is rotationally driven by adrive 31 about arotation axis 33. In order to produce the forwards and backwards motion of the wovenfabric 4, in the present example embodiment an oscillating or swinging motion of intermediately arranged deflecting rolls 34, 37 is realized in the warp thread path or course or in the woven fabric path or course. This oscillating or swinging motion of the deflecting rolls 34, 37 is presently realized actively with a reversing oscillating drive (not illustrated in the figures) that synchronously moves both deflectingrolls - The drawing-
off roll 32 as well as thefabric clamp 36 and if applicable the deflectingroll 34 are part of a drawing-off arrangement ordevice 30, whereby the drives of these devices must be exactly adapted to one another. This is carried out by a control arrangement 50 (in this regard see below in connection with the explanation of the invention). - The deflecting
roll 34 is arranged in the fabric path between the loom shed 3 and the drawing-off roll 32. Thefabric clamp 36 is also located in this area, and is preferably arranged in the area of the fabricrear edge 5. - The
optional deflecting roll 37 is arranged in the rear area or region of the weaving machine between the heald frames 25 and thesupply bobbins 9. - In principle it is also possible to avoid an oscillating or swinging motion of the deflecting rolls 34 and 37, whereby then the forward and backward motion of the woven
fabric 4 must be achieved by corresponding control of thedrive 31 for the drawing-off roll 32. For the compensation in the rear area of the machine, then e.g. corresponding drives for thesupply bobbins 9 would be required. - It has now been found that especially the width of the
weft threads 2 fluctuates due to the production thereof, so that non-uniform fabric appearances arise with fixedly prescribed path distances 38 (for the reverse or reward motion) and 39 (for the subsequent forward motion), which is not desirable for all applications. - Therefore, according to the invention, a measuring
arrangement 40 for detecting geometric parameters, especially the width, of theweft threads 2 before their insertion in the respective formed loom shed 3 is provided. In the present example embodiment, the measuringarrangement 40 is provided between theweft thread bobbin 7 and the clamping and cuttingarrangement 21 below theweft thread 2. - The measuring
arrangement 40 presently is based on an optical measuring principle and in this regard probes or scans theweft thread 2. For example the measuringarrangement 40 can be embodied as an optical precision micrometer. The optical signals reflected back from theweft thread 2 are received by the measuringarrangement 40. Alternatively or additionally, a receiver 41 (shown in dashed lines inFIG. 2 ) is arranged above theweft thread 2. In principle, measuringarrangements 40 for detecting geometric parameters of an elongated surfacially shaped structure, such as that of a tape, are known and do not need to be explained in further detail here. - The measurement values or measurement results detected by the measuring
arrangement 40 are presently provided further to an evaluating arrangement ordevice 45, which evaluates the measurement results and provides the results of the evaluation (which are presently also referred to as evaluated measurement results) further to a control arrangement ordevice 50. Thecontrol arrangement 50 is connected with the drawing-offarrangement 30 and controls the motions of the wovenfabric 4 in that it controls the oscillating or swinging back and forth motion of the deflecting rolls 34, 37 and if applicable of thefabric clamp 36 and also controls the winding or rolling up of the wovenfabric 4 onto the drawing-off roll 32. In this regard, thecontrol arrangement 50 is connected with the drive for the oscillating motion of the deflecting rolls 34, 37 and if applicable with thedrive 35 that drives thefabric clamp 36, as well as also with thedrive 31 that drives the drawing-off roll 32. - Generally it is noted that the signal and control lines in
FIGS. 1 and 2 are illustrated with dash-dotted lines. - The measuring
arrangement 40 is preferably embodied for the continuous measurement of the geometry of theweft thread 2. Thereby all deviations from the ideal form or shape (width, holes, lateral chipping or spalling) are reliably detected. In this regard, the measurement is preferably carried out when theweft thread 2 is guided past the measuringarrangement 40. - In this regard, the continuous measurement suitably also encompasses the measurement values of that section of the
weft thread 2 located in the measurement area, which belongs to theweft thread 2 that is to be inserted next), while this is still clamped by the clamping and cuttingarrangement 21. The measured values in this regard are preferably also taken into consideration by the evaluatingarrangement 45, so that measured values are present over the entire length of the next to-be-inserted weft thread 2. - The evaluating
arrangement 45 is preferably embodied in such a manner so that it is able to calculate the minimum width and/or the maximum width of the weft thread to be inserted. Alternatively or additionally, the evaluatingarrangement 45 can calculate, for example, a mixed value based on several measured values of aweft thread 2, especially the width average value thereof. - Based on the evaluations of the
evaluation arrangement 45, the drive of the deflecting rolls 34, 37 and if applicable thedrive 35 of thefabric clamp 36 can be actuated by thecontrol arrangement 50, in order to drive or move the wovenfabric 4 back by an adaptedpath distance 38 contrary to thewarp direction 6 based on the determined weft thread width (for example based on the determined extreme values relating to the weft thread width or a mixed value). Thesubsequent counter motion 39 of the wovenfabric 4 in thewarp direction 6 is also correspondingly adapted, so that theforward path distance 39 just like therearward path distance 38 varies depending on the evaluation. Contrary to the prior art, thus no constant prescribed motions of the wovenfabric 4 are provided after each weft insertion, but rather motions that are adapted to the actual width of the respective previously inserted weft thread. Also the winding or rolling-up of the wovenfabric 4 onto the drawing-off roll 32 as well as the oscillating motion of the deflectingroll 34 between drawing-off roll 32 andfabric clamp 36 are controlled dependent on the actual current determined weft thread width. - The drives with which the various different motions of the previously described structural assemblies of the weaving machine are controlled are preferably embodied as individually actuatable motors or as motor-transmission combinations, which preferably receive their signals from the
control arrangement 50. These drives are embodied so that they—as needed—carry out reversing pivoting, rotating or linear motions. - The
control arrangement 50 can actuate the drawing-offarrangement 30, especially the deflectingroll 34 and thefabric clamp 36, in such a manner so that thewoven fabric 4 is positioned in the most varied manner before the next weft insertion. For example in this regard it is possible that thewoven fabric 4—through continuous consideration of the width of therespective weft threads 2—comprises no gaps. Alternatively, thewoven fabric 4 is positioned before the respective next weft thread insertion in such a manner so that a spacing distance of eachweft thread 2 relative to the fabricrear edge 5 is always present, so that a fabric appearance with gaps betweensuccessive weft threads 2 results. Corresponding to a further alternative, the drawing-offarrangement 30 is controlled in such a manner so that along the currently insertedweft thread 2 that fluctuates in its width, one or more gaps are formed with the fabricrear edge 5, whereby in the remaining areas thisweft thread 2 contacts against the fabricrear edge 5 and/or even forms overlapping regions with the fabricrear edge 5. - Mixed forms of the abovementioned fabric appearances are also possible without difficulty through corresponding adjustment of the
control arrangement 50. - The evaluating
arrangement 45 and/or thecontrol arrangement 50 are preferably embodied and configured in such a manner so as at least to stop the further weft insertion as well as the drawing-offarrangement 30 in the event of exceeding and/or falling below prescribed weft thread widths, and/or to output a prescribed signal. Similarly it is advantageous if the evaluatingarrangement 45 can recognize faults of theweft thread 2 to be inserted, for example holes and/or splices, and can trigger a prescribed action of the weaving machine, especially via thecontrol unit 50. - The present invention is not limited to the illustrated and described example embodiments. Derivations or modifications within the scope of the patent claims are also possible just like a combination of the features, even when these are illustrated and described in different example embodiments.
- 1 warp threads
- 2 weft threads (tapes)
- 3 loom shed
- 4 woven fabric
- 5 fabric rear edge
- 6 warp thread direction
- 7 weft thread bobbin
- 8 rotation axis
- 9 supply bobbins
- 10 shedding arrangement
- 11 drive for shedding arrangement
- 20 weft insertion arrangement
- 21 clamping and cutting arrangement
- 22 drive for gripper
- 23 gripper head
- 24 gripper rod
- 25 heald frame
- 29 pivot point
- 30 drawing-off arrangement
- 31 drive for drawing-off roll
- 32 drawing-off roll
- 33 rotation axis
- 34 deflecting roll
- 35 drive for fabric clamp
- 36 fabric clamp
- 37 deflecting roll
- 38 rearward path distance
- 39 forward path distance
- 40 measuring arrangement
- 41 receiver
- 45 evaluating arrangement
- 50 control arrangement
Claims (13)
1. A weaving machine comprising:
a shedding arrangement (10) for forming loom sheds (3) between warp threads (1) pulled off from a thread supply (9),
a weft insertion arrangement (20) for inserting weft threads (2) in the form of tapes into the formed loom sheds (3),
a drawing-off arrangement (30) for drawing-off the woven fabric (4) formed of warp and weft threads (1, 2) after a weft thread insertion,
a measuring arrangement (40) for detecting geometric parameters, especially the width, of a weft thread (2) before its insertion into the formed loom shed (3),
an evaluating arrangement (45) for evaluating the detected measurement results, and
a control arrangement (50) connected with the drawing-off arrangement (30) for controlling a motion of the woven fabric (4) including the drawing-off based on the evaluated measurement results.
2. The weaving machine according to claim 1 , characterized in that the measuring arrangement (10) is based on at least one of the following measuring methods:
an optical measuring method, wherein the measuring arrangement (10) is preferably embodied in the form of an optical precision micrometer, and/or
an acoustic measuring method, especially operating by means of ultrasound, and/or
a tactile measuring method.
3. The weaving machine according to claim 1 , characterized in that the measuring arrangement (40) is embodied and configured to continuously detect the width of a weft thread (2).
4. The weaving machine according to claim 1 , characterized in that the measuring arrangement (40) is arranged in such a manner so that it is able to measure the width values of the weft thread (2) that is next to be inserted or of a weft thread (2) during its insertion, wherein the measurement can be carried out on the moving weft thread (2).
5. The weaving machine according to claim 1 , characterized in that the measuring arrangement (40) is arranged on the insertion side of the weft thread (2).
6. The weaving machine according to claim 1 , characterized in that the evaluating arrangement (45) is embodied to calculate the minimum width and/or the maximum width of a measured weft thread (2).
7. The weaving machine according to claim 1 , characterized in that the evaluating arrangement (45) is embodied to calculate a mixed value on the basis of several measured values of a weft thread (2) to be inserted or of a weft thread (2) during its insertion, especially its width average value.
8. The weaving machine according to claim 1 , characterized in that the drawing-off arrangement (30) encompasses a drivable drawing-off roll (32).
9. The weaving machine according to claim 8 , characterized in that the drawing-off arrangement (30) further encompasses an oscillatingly or swingingly drivable deflecting roll (34) that is arranged in the fabric path between the loom shed (3) and the drivable drawing-off roll (32).
10. The weaving machine according to claim 1 , characterized in that the drawing-off arrangement (30) comprises a fabric clamp (36), and in that the drawing-off arrangement (30) is actuatable in such a manner by the control arrangement (50) so that the woven fabric (4) together with the fabric clamp (36) is moved back contrary to the weaving direction by a prescribed path distance (38), which is preferably determined based on the evaluated measurement results, preferably until contacting against the previously inserted weft thread (2).
11. The weaving machine according to claim 1 , characterized in that by controlling the drawing-off arrangement (30) the woven fabric (4) can be positioned before the next weft insertion in such a manner so that the weft thread (2) is insertable according to one of the following manners:
over its entire weft length without any gap formation with the fabric rear edge (5), or
over its entire weft length with a gap relative to the fabric rear edge (5), or
over its entire weft length while forming one or more gaps with the fabric rear edge (5), and namely with area-wise contacting on the fabric rear edge (5) and/or overlapping with the fabric rear edge (5).
12. The weaving machine according to claim 1 , characterized in that the evaluating arrangement (45) and/or the control arrangement (50) are embodied at least to stop the further weft insertion and the drawing-off arrangement (30) upon exceeding and/or falling below prescribed weft thread widths and/or to output a prescribed signal.
13. The weaving machine according to claim 1 , characterized in that the evaluating arrangement (45) is embodied to recognize faults of the weft thread (2) to be inserted, for example holes and/or splices, and to trigger a prescribed action of the weaving machine.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015213015.0 | 2015-07-13 | ||
DE102015213015.0A DE102015213015B3 (en) | 2015-07-13 | 2015-07-13 | loom |
PCT/EP2016/064457 WO2017009015A1 (en) | 2015-07-13 | 2016-06-22 | Weaving machine |
Publications (1)
Publication Number | Publication Date |
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US20180179675A1 true US20180179675A1 (en) | 2018-06-28 |
Family
ID=56133313
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/736,482 Abandoned US20180179675A1 (en) | 2015-07-13 | 2016-06-22 | Weaving Machine |
Country Status (11)
Country | Link |
---|---|
US (1) | US20180179675A1 (en) |
EP (1) | EP3322845A1 (en) |
JP (1) | JP2018524491A (en) |
KR (1) | KR20180030623A (en) |
CN (1) | CN107849761A (en) |
AU (1) | AU2016293350A1 (en) |
CA (1) | CA2990732A1 (en) |
DE (1) | DE102015213015B3 (en) |
RU (1) | RU2018105076A (en) |
TW (1) | TWI599691B (en) |
WO (1) | WO2017009015A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10920343B2 (en) | 2018-05-17 | 2021-02-16 | James Tolle | Fixed orientation weaving apparatus |
US20230096264A1 (en) * | 2019-04-10 | 2023-03-30 | Textilma Ag | Method for Pattern-Directed Formation of the Connection Point of an Effect Thread in the Woven Fabric |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2726078C1 (en) * | 2020-02-03 | 2020-07-09 | Анатолий Николаевич Чистяков | Weaving method and vertical weaving machine for its implementation |
KR20210123169A (en) | 2020-04-02 | 2021-10-13 | 재단법인 구미전자정보기술원 | Tape-type weft width equalization supply device and spreading tow fabric weaving system including the supply device |
CN116084075B (en) * | 2023-03-06 | 2023-07-07 | 山东新科凯邦通信器材有限公司 | Self-adjustment-based textile preparation system |
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2015
- 2015-07-13 DE DE102015213015.0A patent/DE102015213015B3/en not_active Expired - Fee Related
-
2016
- 2016-06-20 TW TW105119286A patent/TWI599691B/en not_active IP Right Cessation
- 2016-06-22 WO PCT/EP2016/064457 patent/WO2017009015A1/en active Application Filing
- 2016-06-22 US US15/736,482 patent/US20180179675A1/en not_active Abandoned
- 2016-06-22 CA CA2990732A patent/CA2990732A1/en not_active Abandoned
- 2016-06-22 JP JP2018501319A patent/JP2018524491A/en active Pending
- 2016-06-22 RU RU2018105076A patent/RU2018105076A/en not_active Application Discontinuation
- 2016-06-22 AU AU2016293350A patent/AU2016293350A1/en not_active Abandoned
- 2016-06-22 EP EP16732269.2A patent/EP3322845A1/en not_active Withdrawn
- 2016-06-22 CN CN201680041271.9A patent/CN107849761A/en active Pending
- 2016-06-22 KR KR1020187004053A patent/KR20180030623A/en unknown
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US5251673A (en) * | 1990-12-28 | 1993-10-12 | Nissan Motor Co., Ltd. | Weft sensing imaging system for weaving machine |
US20040016472A1 (en) * | 2000-10-24 | 2004-01-29 | Stefano Lamprillo | Weft thread monitoring device |
US20090007981A1 (en) * | 2005-01-17 | 2009-01-08 | Nandan Khokar | Woven Material Comprising Tape-Like Warp and Weft, and an Apparatus and Method for Weaving Thereof |
US20160177481A1 (en) * | 2013-07-30 | 2016-06-23 | Staubli Sargans Ag | Monitoring device for a weaving machine, weaving machine, and method for monitoring |
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US10920343B2 (en) | 2018-05-17 | 2021-02-16 | James Tolle | Fixed orientation weaving apparatus |
US20230096264A1 (en) * | 2019-04-10 | 2023-03-30 | Textilma Ag | Method for Pattern-Directed Formation of the Connection Point of an Effect Thread in the Woven Fabric |
Also Published As
Publication number | Publication date |
---|---|
CN107849761A (en) | 2018-03-27 |
RU2018105076A (en) | 2019-08-13 |
TW201708648A (en) | 2017-03-01 |
AU2016293350A1 (en) | 2018-01-18 |
EP3322845A1 (en) | 2018-05-23 |
DE102015213015B3 (en) | 2016-07-07 |
KR20180030623A (en) | 2018-03-23 |
TWI599691B (en) | 2017-09-21 |
WO2017009015A1 (en) | 2017-01-19 |
JP2018524491A (en) | 2018-08-30 |
CA2990732A1 (en) | 2017-01-19 |
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