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EP3645774B1 - Dispositif et procédé pour positionner les fils et machine textile - Google Patents

Dispositif et procédé pour positionner les fils et machine textile Download PDF

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Publication number
EP3645774B1
EP3645774B1 EP18731434.9A EP18731434A EP3645774B1 EP 3645774 B1 EP3645774 B1 EP 3645774B1 EP 18731434 A EP18731434 A EP 18731434A EP 3645774 B1 EP3645774 B1 EP 3645774B1
Authority
EP
European Patent Office
Prior art keywords
yarn
thread
tools
laid
pair
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18731434.9A
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German (de)
English (en)
Other versions
EP3645774A1 (fr
Inventor
Marcus Weber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hochschule Niederrhein
Original Assignee
Hochschule Niederrhein
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.)
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Publication date
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Publication of EP3645774A1 publication Critical patent/EP3645774A1/fr
Application granted granted Critical
Publication of EP3645774B1 publication Critical patent/EP3645774B1/fr
Active legal-status Critical Current
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B27/00—Details of, or auxiliary devices incorporated in, warp knitting machines, restricted to machines of this kind
    • D04B27/10—Devices for supplying, feeding, or guiding threads to needles
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B23/00—Flat warp knitting machines
    • D04B23/12—Flat warp knitting machines with provision for incorporating unlooped wefts extending from selvedge to selvedge
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B23/00—Flat warp knitting machines
    • D04B23/22—Flat warp knitting machines with special thread-guiding means

Definitions

  • the invention relates to a device and a method for presenting threads for loop-forming tools of a textile machine, which are arranged in at least one row, and a corresponding textile machine.
  • a textile machine designed as a warp knitting machine, in particular as a Raschel machine, is for example in FIG DE 1 268 305 A described.
  • a thread designed as a weft thread is presented by a thread guide of a long weft device, which can be moved between two reversal points by means of an actuating cylinder, approximately parallel to the row of knitting needles on its rear side during a loop formation process. When the needles are knocked off across the row of needles, the weft thread is brought to the front of the row of knitting needles under the action of suction nozzles.
  • a device for presenting weft threads for warp knitting machines in particular for Raschel machines, is known, in which a thread guide guided on a circular path is provided. It is a rotating element designed as a rod, at the end of which the thread guide is arranged. The rod can be rotated in a direction of rotation about an axis directed perpendicular to its direction of extension.
  • the weft thread is guided from the bobbin through the axis of the rod to the thread guide.
  • the drive for the holding elements is matched to the rotational movement of the rod in such a way that the weft threads do not cross between the holding elements.
  • the holding elements also serve as guide links for placing the weft threads on the warp threads.
  • the DE 19 41 726 A1 describes in a warp knitting machine, in particular a Raschel machine, to arrange a device known per se for inserting a weft thread both in front of and behind the knitting needles.
  • the corresponding weft thread is fed to each of the two insertion devices by a revolving, crank-shaped thread guide.
  • I. E. Two weft threads are fed to the knitting needles through two insertion devices.
  • a warp knitting machine in particular a Raschel machine, with a device for inserting a weft thread is from the DE 1 920 477 A famous.
  • the weft thread is laid ready by means of holding elements arranged in the area of the web edges outside the needle zone and applied to the warp threads by means of guide links.
  • To lay the weft thread ready several thread guides guided on a circular path are provided, each of which is assigned a bobbin holder rotating synchronously with it.
  • Storage elements for receiving a plurality of weft thread lengths corresponding to the fabric width are arranged between the thread guides and the knitting needles.
  • a device for laying weft threads on warp knitting machines is in the DE 20 35 007 A described.
  • the device comprises a thread guide consisting of a tube, which is guided by a revolving belt over reversal points in the area of the web edges.
  • Storage devices are provided which take up the individual lengths of weft thread and which are moved in the direction of the knitting tools.
  • a warp knitting machine in particular a Raschel machine, for the production of warp knitted goods with long weft threads with a device for endlessly presenting several weft threads is in the DE 24 01 050 described.
  • a carriage places the weft threads in conveyor belts arranged on both sides, through which the weft threads are guided to the knitting tools.
  • the object of the invention is to develop a device and a method for presenting threads for loop-forming tools of a textile machine and a corresponding textile machine, the threads being presented to the tools at high speeds.
  • the speed of moving back and forth should be increased.
  • a device for presenting threads for loop-forming tools of a textile machine, which are arranged in at least one row, comprises a thread guide device which has at least one rotary element with at least one thread guide.
  • the thread guide device is designed to move a weft thread back and forth in two directions in the area in front of tools of the textile machine that extend over a lifting area.
  • the thread guide device has at least two rotating elements arranged as a pair, the rotating elements of a pair being arranged one above the other in the axial direction and being drivable in opposite directions of rotation.
  • Each rotary element comprises at least one thread guide designed as a driver element for laying the weft thread in one of the directions.
  • the driver elements are designed as driver vanes.
  • the design of the thread guide as a driver wing enables simple thread guidance without effort through tubes or eyelets.
  • the DE 83 02 278 describes a winding machine for winding threads on bobbin tubes with a traversing device by means of which the thread is moved back and forth over a traversing stroke essentially corresponding to the bobbin length, essentially transversely to the running direction.
  • the traversing device comprises two rotors that are eccentrically supported and driven to rotate in opposite directions. Each of the rotors has at least two driver arms, the driver arms of the two rotors rotating in two closely adjacent planes of rotation penetrated by the thread path.
  • the thread is presented to the tools, i.e. made available, and taken up during the loop formation.
  • a thread guide device with at least two rotating thread guides for one direction each of the back and forth movement in front of the loop-forming tools enables a significantly higher speed of laying the thread than with known thread guide devices. This simplifies the presentation of the thread and thus the entire mechanical complexity of the textile machine.
  • warp knitting machines with the thread guide device with which a weft thread is laid back and forth, speeds of, for example, 1500 meters per minute can be achieved. For certain warp knitting machines, for example for many Raschel machines, this speed is sufficient to present the weft thread without an additional storage device.
  • this fast thread guide device offers new uses, e.g. B. in the fields of the production of nets, reinforcement textiles, geotextiles or tips.
  • the thread guide device is designed to present the thread over a lifting range per pair of rotary elements of 0.05 cm to 100 cm, in particular from 0.5 cm to 50 cm.
  • the device has a feed device which is designed to feed the thread laid in one direction to the tools.
  • the feed device is designed, for example, as a gripper extending along the tools.
  • the device has a holding device with two holding elements which are arranged in the area of reversal points of the thread at a distance from the lifting area.
  • Each holding element is designed to receive the thread laid in one direction by the thread guide device.
  • the holding device is designed to feed the held thread to the tools.
  • a feed device is provided in addition to the holding device.
  • a thread guide device with two rotating thread guides for one direction each of the back and forth movement makes it possible to set a phase shift between the two thread guides.
  • the constant phase shift is the angle between the start position of the first thread guide of the upper rotary element of a pair, which moves the thread in one direction, and the start position of the second thread guide of the lower rotary element, which takes over the thread, which moves the thread in the back (forth) direction. relocated, denotes when the two rotating elements rotate at the same speed in opposite directions.
  • a changing phase shift is produced by different speeds of rotation of the rotating elements of a pair.
  • each rotating element has a thread guide designed as a driver wing.
  • Each thread guide is designed to move the thread half a turn, i.e. a turn by 180 °, over the stroke range in one direction.
  • each thread guide is designed to move the thread over the stroke range in one direction with a quarter of a revolution, that is to say a rotation of 90 °.
  • the thread is moved in one direction by a thread guide, held at a thread reversal point, moved by the other thread guide in the other direction and held again at the thread reversal point.
  • the thread is held, for example, in a feed device or at the thread reversal points by the holding device.
  • the rotating elements each have at least two thread guides. With one rotation of the corresponding rotary element, the thread can be laid twice in the associated direction with, for example, two thread guides of a rotary element.
  • the z. B. designed as a driver wing thread guide of a rotary element is arranged evenly distributed over the circumference.
  • the thread guide device has a number of pairs, each with two rotating elements.
  • the pairs are arranged side by side.
  • the thread guide device is designed so that the thread is laid by each pair over a lifting range which corresponds to an entire lifting range divided by the number of pairs.
  • the thread to be laid in one direction is transferred from one pair of rotating elements to the next pair.
  • the size of the rotating elements increases with increasing stroke range and reaches the limits of the space available in the textile machine. If several pairs are arranged next to one another, the size can be reduced or the stroke width can be increased. If several pairs of rotating elements are arranged, a total lifting range of up to approx. 600 cm is possible.
  • a textile machine according to the invention with at least one row of machine-forming tools has a device described above for each row of tools.
  • Textile machines with loop-forming tools which are arranged in at least one row are, for example, warp knitting machines, namely warp knitting machines, Raschel machines and crochet galloon machines, as well as stitch-bonding machines and flat knitting machines.
  • a thread to be presented to the tools of a warp knitting machine or a stitch-knitting machine or knitting tools or a flat knitting machine referred to as knitting tools is designed as a warp thread or as a weft thread.
  • the thread laid at least in one direction is laid in front of, behind or over the tools.
  • the textile machine is a warp knitting machine with a device for placing threads in the form of weft threads in front of tools in the form of knitting tools arranged in a row.
  • Figure 1 a section of a narrow band of a warp knitted fabric is shown schematically, which can be produced by the warp knitting machine.
  • the warp knitting machine is designed, for example, as an RL-Raschel machine with a number of knitting tools, RL means right-left stitch sequence.
  • the warp knitted fabric is produced from warp threads 1 forming five stitches and a weft thread 2.
  • Figure 1 shows a cut course and four complete courses with three weft reversal points 3.
  • the device for presenting the weft thread for the knitting tools has a thread guide device.
  • the Figures 2a and 2b show the principle of the thread guide device on the basis of a perspective illustration. It is designed for the weft thread 2 in the area in front of the knitting tools of the warp knitting machine, which extend over one, in Figure 2b indicated, extend the entire stroke area B, to relocate back and forth in two directions HI, HR.
  • the thread guide device has two rotating elements 4, 5 arranged as a pair.
  • the rotary elements 4, 5 are arranged in front of a number of knitting tools, wherein in the Figures 2a, 2b Sinkers 6 and five draw needles 7 of the knitting tools of the warp knitting machine can be seen.
  • the rotating elements 4, 5 of the pair are in the direction of their common axis of rotation D, which in FIG Figure 3 is shown, arranged one above the other.
  • the rotating elements 4, 5 of the pair can be driven in opposite directions of rotation R1, R2.
  • the rotary element 4 is in the in the Figures 2a, 2b
  • the example shown is arranged above the rotary element 5.
  • the axis of rotation of the two rotary elements 4, 5 runs parallel to the direction of movement RZ of the latch needles 7 and thus perpendicular to the row of knitting tools.
  • Each rotary element 4, 5 has three thread guides 4a, 4b, 4c, 5a, 5b, 5c designed as driver wings for laying the weft thread 2 in one of the directions HI, HR.
  • Figure 2b shows the transfer of the weft thread 2 from the thread guide 4a of the upper rotary element 4 to the thread guide 5a of the lower rotary element 5.
  • the latch needles are in a knock-off position.
  • Figure 3 shows, not to scale and schematically, the warp knitting machine with the device for placing the weft thread 2 in front of the knitting tools, specifically on the basis of a schematic vertical cross section.
  • the thread guide device with the rotary elements 4 and 5 are arranged in front of the knitting tools 7 of the knitting machine.
  • the position of the rotary elements 4, 5 corresponds to that of Figure 2a .
  • one of the latch needles 7, one of the knock-off sinkers 6, one of the perforated needles 8 and one of the warp threads 1 are shown.
  • the warp threads 1 are guided through the perforated needles 8 to the latch needles 7.
  • the weft thread 2 is closed by a bobbin 9 the thread guide 4a of the rotary element 4, through which it is moved in front of the latch needle 7 below the tongues 7a.
  • the rotating elements 4, 5 of a pair are arranged in such a way that the revolving thread guides 4a, 4b, 4c, 5a, 5b, 5c cross the thread path of the weft thread 2 from the bobbin 9 to the knitting tools.
  • the warp knitting machine is indicated by a rear side wall 10 and a foundation 11.
  • the warp knitting machine points to the withdrawal of the behind the knitting tools, in Figure 3 on the left side, produced warp knitted fabric KG in the take-off direction P a pair of rollers 12 and a winding beam 13 on.
  • the weft thread 1 is laid back and forth in two directions HI, HR in the area in front of the knitting tools of the warp knitting machine that extend over the entire stroke width B by the thread guide device.
  • the rotating elements 4, 5 of the thread guide device which are arranged as a pair, are driven one above the other in the axial direction and in opposite directions of rotation R1, R2.
  • the weft thread 2 is laid by the thread guides 4a, 4b, 4c, 5a, 5b, 5c of a rotary element 4, 5 in one of the directions HI, HR. That is, through the rotating thread guides 4a, 4b, 4c, 5a, 5b, 5c of the rotary elements 4, 5 of a pair, the weft thread 2 is captured in the thread path of the weft thread 2 from the bobbin 9 to the knitting tools, laid back and forth and presented to the knitting tools .
  • the weft thread 2 is through the thread guides 4a, 4b, 4c of the rotary element 4 in the direction HI, in the Figures 2a, 2b from right to left, and through the thread guides 5a, 5b, 5c of the rotary element 5 in the direction of HR, in the Figures 2a, 2b moved from left to right.
  • the weft thread 2 is alternately guided through the thread guides 4a, 4b, 4c of the rotary element 4 and the thread guides 5a, 5b, 5c of the rotary element 5.
  • the weft thread 2 taken over by the thread guide 5b from the thread guide 4a.
  • the axis of rotation of the two rotary elements runs at an acute angle to the direction of movement RZ of the latch needles 7.
  • the two rotating elements of a pair are arranged eccentrically parallel to the row of the knitting tools.
  • the warp knitting machine is designed as an RR Raschel machine with two rows of knitting tools.
  • the warp knitting machine has a device for presenting a weft thread for each of the two rows.
  • the second example corresponds to the first example except for the features described below.
  • FIG 4 a section of a narrow band of a warp knit KG is shown schematically.
  • the warp knitted fabric KG is made from warp threads 1 forming nine stitches and a weft thread 2.
  • Figure 1 shows a cut course and nine complete courses.
  • the weft thread 2 is guided around all the stitches of a row in the top five courses with five weft reversal points 3.
  • the weft thread 2 runs through only part of the stitches, namely through four stitches, with two inner weft reversal points 3i being formed in addition to a further outer weft reversal point 3.
  • FIG. 5 shows the principle of a thread guide device of the device of the second example.
  • the thread guide device comprises a number N of three pairs, each with two rotary elements 20, 21, 30, 31, 40, 41, each of which has two thread guides 20a, 20b, 21a, 21b, 30a, 30b, 31a, 31b, 40a, 40b, 41a, 41b.
  • the three pairs are arranged next to one another along an entire lifting area BG.
  • Each pair is designed to lay the weft thread over a partial lift area BT.
  • the stroke range BT corresponds to the entire stroke range BG divided by the number N of pairs, ie divided by 3.
  • the stroke range BT of a pair of rotary elements 20, 21, 30, 31, 40, 41 is 3 cm in this example.
  • the entire stroke range BG is z. B. 9 cm.
  • the weft thread 2 is laid over a lifting area BT, which corresponds to the entire lifting area BG divided by the number N of pairs. This is for the top five courses of the in Figure 4 shown warp knitted KG shown.
  • the weft thread 2 is laid by the right pair of rotating elements 20, 21 over the right three stitches and is laid by the middle pair of rotating elements 30, 31 over a stitch.
  • the stroke range of a pair of rotating elements is 0.5 cm to 50 cm.
  • weft threads are provided in an alternative to a warp knitted fabric.
  • Several weft threads are simultaneously laid back and forth by several pairs of rotating elements of the thread guide device and presented to the knitting tools one above the other.
  • Such warp knitted fabrics can be used in lightweight construction, for example for composite structures in wind turbines or in automobiles.
  • Warp thread B Lifting range 2 Weft thread RZ direction 2G Knitted section R1 Direction of rotation 2S Coil section R2 Direction of rotation 3 Shot reversal point HI direction 4th Rotary element MR direction 4a-4c Thread guide P.
  • Direction of withdrawal 5 Rotary element KG Warp knit 5a-5c Thread guide BG entire lifting range 6th Tee plate BT Stroke range of a couple 7th Latch needle 7a tongue 8th Punch needle 9 Kitchen sink 10

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)

Claims (10)

  1. Dispositif pour positionner des fils pour des outils (7) formant des mailles d'une machine textile, qui sont disposés dans au moins une rangée et qui s'étendent sur une zone de course, avec un dispositif de guide-fil doté d'au moins un élément rotatif (4, 5, 20, 21, 30, 31, 40, 41) dont chacun est pourvu d'au moins un guide-fil (4a, 4b, 4c, 5a, 5b, 5c, 20a, 20b, 21a, 21b, 30a, 30b, 40a, 40b), le dispositif de guide-fil étant conçu pour poser un fil dans l'ensemble de la zone de course (B) respectivement devant la rangée d'outils dans deux directions (HI, HR) en va-et-vient, caractérisé en ce que, pour poser le fil, le dispositif de guide-fil présente au moins deux éléments rotatifs (4, 5, 20, 21, 30, 31, 40, 41) disposés en paire, les éléments rotatifs (4, 5, 20, 21, 30, 31, 40, 41) d'une paire étant superposés dans la direction axiale et peuvent être entraînés dans des sens de rotation opposés (R 1, R2), dans lequel chaque élément rotatif (4, 5, 20, 21, 30, 31, 40, 41) présente au moins un guide-fil (4a, 4b, 4c, 5a, 4b, 4c, 20a, 20b, 21a, 21b, 30a, 30b, 40a, 40b) configuré comme élément entraîneur pour poser le fil (2) dans l'une des directions (HI, HR).
  2. Dispositif selon la revendication 1, caractérisé par un dispositif d'alimentation qui est conçu pour alimenter le fil posé dans une direction (HI, HR) aux outils.
  3. Dispositif selon la revendication 1 ou 2, caractérisé par un dispositif de maintien avec deux éléments de maintien, qui sont disposés dans la zone des points d'inversion du fil à distance de l'ensemble de la zone de course (B, BG), les dispositifs de maintien étant conçus pour prendre le fil posé dans une direction (HI, HR) par le dispositif de guide-fil et pour alimenter celui-ci aux outils.
  4. Dispositif selon la revendication 1 ou 2, caractérisé en ce que les éléments rotatifs (4, 5, 20, 21, 30, 31, 40, 41) comportent au moins deus guide-fils (4a, 4b, 4c, 5a, 5b, 5c, 20a, 20b, 21a, 21b, 30a, 30b, 40a, 40b).
  5. Dispositif selon la revendication 1, caractérisé en ce que le dispositif de guide-fil comporte un nombre (N) de paires avec deux éléments rotatifs (20, 21, 30, 31, 40, 41) dans chaque paire, les paires étant disposées l'une à côté de l'autre, et chaque paire posant le fil sur une zone de course (BT) qui correspond à l'ensemble d'une zone de course (BG) divisé par le nombre (N) des paires.
  6. Machine textile avec au moins une rangée d'outils formant des mailles, caractérisé en ce qu'elle comprend un dispositif selon l'une des revendications 1 à 5 pour chaque rangée d'outils.
  7. Procédé pour positionner des fils pour des outils (7) formant des mailles d'une machine textile, qui sont disposés dans au moins une rangée et qui s'étendent sur une zone de course, avec un dispositif de guide-fil doté d'au moins un élément rotatif (4, 5, 20, 21, 30, 31, 40, 41) dont chacun est pourvu d'au moins un guide-fil (4a, 4b, 4c, 5a, 5b, 5c, 20a, 20b, 21a 21b, 30a, 30b, 40a, 40b) le dispositif de guide-fil posant un fil dans l'ensemble d'une zone de course (B) respectivement devant la rangée d'outils dans deux directions (HI, HR) en va-et-vient, caractérisé en ce que, pour poser le fil, au moins deux éléments rotatifs (4, 5, 20, 21, 30, 31, 40, 41) du dispositif de guide-fil disposés en paire, qui sont superposés dans la direction axiale, sont entraînés dans des sens de rotation opposés (R 1, R2), dans lequel le fil est posé dans l'une des directions (HI, HR) par chaque élément rotatif (4, 5, 20, 21, 30, 31, 40, 41) avec au moins un guide-fil (4a, 4b, 4c, 5a, 5b, 5c, 20a, 20b, 21a, 21b, 30a, 30b, 40a, 40b) configuré comme élément entraîneur.
  8. Procédé selon la revendication 7, caractérisé en ce que le fil posé dans une direction (HI, HR) est alimenté aux outils par un dispositif d'alimentation.
  9. Procédé selon la revendication 7 ou 8, caractérisé en ce que le fil posé dans respectivement une direction (HI, HR) par le dispositif de guide-fil est pris et alimenté aux outils par deux dispositifs de maintien, qui sont disposés dans la zone des points d'inversion du fil à distance de l'ensemble de la zone de course (B, BG).
  10. Procédé selon l'une des revendications 7 à 9, caractérisé en ce que le fil est posé par une paire respective d'un nombre (N) de paires disposées l'une à côté de l'autre, chaque paire comportant deux éléments rotatifs (20, 21, 30, 31, 40, 41) du dispositif de guide-fil, sur une zone de course (BT) qui correspond à l'ensemble de la zone de course (BG) divisé par le nombre (N) des paires.
EP18731434.9A 2017-06-26 2018-06-13 Dispositif et procédé pour positionner les fils et machine textile Active EP3645774B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017114133.2A DE102017114133A1 (de) 2017-06-26 2017-06-26 Vorrichtung und Verfahren zum Vorlegen von Fäden, Textilmaschine
PCT/EP2018/065699 WO2019001969A1 (fr) 2017-06-26 2018-06-13 Dispositif et procédé pour positionner les fils et machine textile

Publications (2)

Publication Number Publication Date
EP3645774A1 EP3645774A1 (fr) 2020-05-06
EP3645774B1 true EP3645774B1 (fr) 2021-08-18

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US (1) US20200109498A1 (fr)
EP (1) EP3645774B1 (fr)
CN (1) CN110770379B (fr)
DE (1) DE102017114133A1 (fr)
WO (1) WO2019001969A1 (fr)

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DE102018127736A1 (de) * 2018-11-07 2020-05-07 Hochschule Niederrhein Vorrichtung und Verfahren zum Vorlegen eines Fadens
CN113026194B (zh) * 2021-03-04 2022-06-21 常州市鑫辉网具有限公司 一种捆草网经编机梳栉运动方法和装置及捆草网经编机

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EP3645774A1 (fr) 2020-05-06
CN110770379A (zh) 2020-02-07
US20200109498A1 (en) 2020-04-09
CN110770379B (zh) 2021-07-09
DE102017114133A1 (de) 2018-12-27

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