US20200109498A1 - Loading yarns into a textile machine - Google Patents

Loading yarns into a textile machine Download PDF

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Publication number
US20200109498A1
US20200109498A1 US16/614,438 US201816614438A US2020109498A1 US 20200109498 A1 US20200109498 A1 US 20200109498A1 US 201816614438 A US201816614438 A US 201816614438A US 2020109498 A1 US2020109498 A1 US 2020109498A1
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United States
Prior art keywords
yarn
tools
rotors
pair
directions
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Abandoned
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US16/614,438
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English (en)
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
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Hochschule Niederrhein
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Assigned to HOCHSCHULE NIEDERRHEIN reassignment HOCHSCHULE NIEDERRHEIN ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WEBER, MARCUS
Publication of US20200109498A1 publication Critical patent/US20200109498A1/en
Abandoned legal-status Critical Current

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    • 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 method and apparatus for loading yarns into at least one row of stitch-forming tools of a textile machine and to a corresponding textile machine.
  • a textile machine for warp knitting in particular a Raschel warp-knitting machine, is described for example in DE 1 268 305.
  • a yarn that used as a weft yarn is displaced by a yarn guide of a long weft device that can be moved between two reversal points by an actuating cylinder approximately parallel to the row of knitting needles at the rear side thereof during a stitch-forming operation.
  • the weft yarn is brought to the front side of the row of knitting needles under the effect of suction nozzles.
  • a warp-knitting machine in particular a Raschel warp-knitting machine, with an apparatus for loading a weft yarn is known from DE 1 920 477.
  • the weft yarn is gripped outside the needle zone by retaining members that are near the edges of the material web and laid against the warp yarns by guide members.
  • a plurality of yarn guides are provided that are guided in a closed path and that each has a respective bobbin holder.
  • Storage elements for receiving a plurality of lengths of weft yarn corresponding to the product width are between the yarn guides and the knitting needles.
  • An apparatus for loading weft yarns to warp-knitting machines is described in DE 20 35 007. It comprises a yarn guide consisting of a tube that is guided by a circulating belt over reversal points near the edges of the material web. Storage devices are provided that receive the individual lengths of weft yarn and are moved toward the knitting tools.
  • a warp-knitting machine for manufacturing warp-knit goods with long weft yarns with a device for continuous supply of a plurality of weft yarns is described in DE 24 01 050.
  • a carriage places the weft yarns between a pair of conveyor belts that feed the weft yarns to the knitting tools.
  • An apparatus for loading yarns into at least one row of stitch-forming tools of a textile machine comprises a yarn loader having at least one rotor with at least one yarn guide.
  • the yarn loader lays a weft yarn back and forth in two directions in the region in front of itself over tools of the textile machine over a stroke range.
  • the yarn loader has at least two rotors provided as a pair, the rotors of each pair being axially one above the other and rotate in opposite directions of rotation.
  • Each rotor comprises at least one yarn guide formed as a driver element for laying the weft yarn in one of the directions.
  • the driver elements are guide arms.
  • the formation of the yarn guides as guide arms makes it possible to effortlessly guide yarns through tubes or eyelets.
  • a winding machine for winding yarns onto bobbin tubes with a traversing device through which the yarn is laid back and forth substantially transverse to the direction of travel over a traverse stroke that corresponds substantially to the bobbin length.
  • the traversing device comprises two rotors that are supported eccentrically relative to one another and driven so as to rotate in opposite directions.
  • Each of the rotors has at least two driver arms, the driver arms of the two rotors rotating on two closely spaced planes of rotation that are penetrated by the yarn course.
  • the yarn is fed, i.e. made available, to the tools with the device according to the invention and taken up during stitch formation.
  • a yarn loader with at least two rotating yarn guides, one for each direction of the reciprocating motion in front of the stitch-forming tools, makes a much higher speed possible in the laying the yarn than with known yarn loaders. This simplifies the presentation of the yarn and thus the entire mechanical complexity of the textile machine.
  • warp-knitting machines speeds of 1500 meters per minute, for example, can be achieved with the yarn loader laying a weft yarn back and forth. For certain warp-knitting machines, for example for many Raschel warp-knitting machines, this speed is sufficient to enable the weft yarn to be fed in without an additional storage device.
  • this fast yarn loader offers new uses, such as in the manufacture of nets, reinforcement textiles, geotextiles, or lace.
  • the yarn loader lays in the yarn over a stroke range per pair of rotors of from 0.05 cm to 100 cm, in particular from 0.5 cm to 50 cm.
  • the device comprises a feeding device that supplies the yarn that is laid in one direction to the tools.
  • the feeding device is embodied as a gripper that extends along the tools.
  • the device has a holding device with two retaining elements that are near reversal points of the yarn spaced apart by the stroke range. Each retaining element receives the yarn that is laid by the yarn loader in a respective one of the directions.
  • the retaining device supplies the retained yarn to the tools.
  • a feeding device is provided in addition to the retaining device.
  • a yarn loader with two rotating yarn guides, each for one direction of the reciprocating motion, makes it possible to set a phase shift between the two yarn guides.
  • the angle between the starting position of the first yarn guide of the upper rotor of a pair that lays the yarn in one direction and the starting position of the second yarn guide of the lower rotary member taking the yarn and laying the yarn back in the other direction is referred to as constant phase shift if the two rotating elements rotate in opposite directions at the same rotational speed.
  • a changing phase shift is produced by different rotational speeds of the rotating elements of a rotor pair.
  • each rotor has a yarn guide formed as a guide arm.
  • Each yarn guide is lays the yarn in one direction over a half turn, i.e. a rotation by 180°, over the stroke range.
  • a 0° phase shift of the two yarn guides of the rotating elements driven in opposite directions of rotation that is, at the same starting position, the yarn is alternately laid back and forth by one and the other yarn guide.
  • each yarn guide lays the yarn in one direction at one-quarter of a turn, i.e. a rotation by 90°, over the stroke range.
  • the yarn is laid by a yarn guide in one direction, held at a yarn reversal point, laid by the other yarn guide in the other direction, and again held at the yarn reversal point.
  • the yarn is held in a feeding device, for example, or at the yarn reversal points, by the retaining device.
  • the rotors each have at least two yarn guides. During one turn of the corresponding rotor, the yarn can be laid twice in the corresponding direction if the rotor has two yarn guides, for example.
  • the yarn guides of a rotor which are guide arms, for example, are provided so as to be distributed angularly uniformly.
  • they are angularly unevenly distributed.
  • the yarn loader comprises a number of pairs, each with two rotors.
  • the pairs are side by side.
  • the yarn loader lays the yarn over a stroke range by each pair, this stroke range corresponding to a full machine width divided by the number of pairs.
  • the yarn to be laid in one direction is transferred from one pair of rotors to the next pair.
  • the overall size of the rotors increases with increasing stroke range and reaches the limits of the space that is available in the textile machine.
  • the arrangement of multiple pairs next to one another enables the overall size to be reduced or the stroke width to be increased. If multiple pairs of rotors are provided, a total stroke range up to about 600 cm is possible.
  • a textile machine according to the invention with at least one row of stitch-forming tools has one of each of the loaders described above for each row of tools.
  • Textile machines with at least one row of stitch-forming tools include warp-knitting machines, namely automatic warp-knitting machines, Raschel warp-knitting machines and crochet galloon machines, as well as stitch-bonding machines and flat-knitting machines.
  • a yarn that is to be fed to tools of a warp-knitting machine or of a stitch-bonding machine or knitting tools or of a flat-knitting machine that are designated as knitting tools is a warp yarn or as a weft yarn.
  • the yarn that is laid in at least one direction is placed in front of, behind, or over the tools.
  • FIG. 1 is a schematic view of the principle of a warp-knit fabric with a weft yarn
  • FIG. 2 a is a schematic perspective view of a pair of rotors of a first device according to the invention for loading yarns in a first position;
  • FIG. 2 b is a schematic view corresponding to FIG. 2 a in a second position
  • FIG. 3 is a schematic view of a textile machine according to the invention embodied as a warp-knitting machine with the apparatus according to the invention of the first example;
  • FIG. 4 is a view of the principle of another warp-knit fabric with a weft yarn.
  • FIG. 5 is a schematic view of three pairs of rotors of a second device according to the invention for loading yarns.
  • the textile machine is a warp-knitting machine with an apparatus for loading yarns as weft yarns in front of a row of knitting tools.
  • FIG. 1 is a schematic illustration of a section of a narrow strip of a warp-knit fabric that can be produced by the warp-knitting machine.
  • the warp-knitting machine is embodied, for example, as an RL Raschel warp-knitting machine with one row of knitting tools, with “RL” meaning right-left stitching.
  • the warp-knit fabric is composed of five stitch-forming warp yarns 1 and one weft yarn 2 .
  • FIG. 1 shows a cutaway row of stitches and four complete rows of stitches with three weft reversal points 3 .
  • FIGS. 2 a and 2 b show the principle of the yarn loader in a perspective view. It lays the weft yarn 2 back and forth in two directions HI, HR in the region in front of the knitting tools of the warp-knitting machine that extend over a full machine width B indicated in FIG. 2 b.
  • the yarn loader has two rotors 4 and 5 provided as a pair.
  • the rotors 4 and 5 are in front of a row of knitting tools, with knock-over bits 6 and five latch needles 7 of the knitting tools of the warp-knitting machine being visible in FIGS. 2 a , 2 b .
  • the rotors 4 and 5 of the pair are one above the other in the direction of their common axis D shown in FIG. 3 .
  • the rotors 4 and 5 of the pair can be driven in opposite directions of rotation R 1 , R 2 .
  • the rotor 4 is above the rotor 5 .
  • the axis of rotation of the two rotors 4 and 5 is parallel to the direction of movement RZ of the latch needles 7 and thus perpendicular to the row of knitting tools.
  • Each rotor 4 and 5 has three yarn guides 4 a , 4 b , 4 c , 5 a , 5 b , 5 c that are driver elements for laying the weft yarn 2 in one of the directions HI, HR.
  • FIG. 2 a In a first position shown in FIG. 2 a , the warp yarns 1 coming from above in FIGS. 2 a and 2 b are guided around the latch needles 7 to form a next stitch above the latch 7 a of the latch needle 7 .
  • Each of the warp yarns 1 forms a stitch beneath the latch 7 a of the latch needle 7 into which a knit portion 2 G of the weft yarn 2 running from left to right is already incorporated in FIG. 2 a .
  • the weft yarn 2 is laid by the yarn guide 4 a of the rotary member 4 in the direction HI in front of two latch needles 7 starting from the weft reversal point 3 .
  • FIG. 2 b shows the transfer of the weft yarn 2 from the yarn guide 4 a of the upper rotor 4 to the yarn guide 5 a of the lower rotor 5 .
  • the latch needles are in a knock-over position.
  • FIG. 3 shows a schematic and not-to-scale illustration of the warp-knitting machine with the apparatus for loading the weft yarn 2 in front of the knitting tools, particularly as a schematic vertical cross section.
  • the yarn loader with the rotors 4 and 5 are in front of the knitting tools 7 of the knitting machine.
  • the position of the rotors 4 and 5 corresponds to that of FIG. 2 a.
  • One of the latch needles 7 , one of the knock-over bits 6 , one of the guide needles 8 , and one of the warp yarns 1 of the knitting tools are shown.
  • the warp yarns 1 are guided through the guide needles 8 to the latch needles 7 .
  • the weft yarn 2 is guided from a bobbin 9 to the yarn guide 4 a of the rotor 4 that lays it in front of the latch needle 7 beneath the latches 7 a.
  • the rotors 4 and 5 of a pair are provided such that the rotating yarn guides 4 a , 4 b , 4 c , 5 a , 5 b , 5 c cross the yarn path of the weft yarn 2 from the bobbin 9 to the knitting tools.
  • the warp-knitting machine is indicated by a rear side wall 10 and a base 11 .
  • the warp-knitting machine has a pair of rollers 12 and a take-up roll 13 for winding up the warp-knit fabric KG produced in the take-off direction P downstream of the knitting tools (left side in FIG. 3 ).
  • the weft yarn 1 is laid back and forth by the yarn loader in the region in front of the knitting tools of the warp-knitting machine in two directions HI, HR that extend over the complete stroke width B.
  • the rotors 4 and 5 of the yarn loader that are provided as a pair are axially one above the other and driven in opposite directions of rotation R 1 , R 2 .
  • the weft yarn 2 is respectively laid by the yarn guides 4 a , 4 b , 4 c , 5 a , 5 b , 5 c that are guide arms in one of the directions HI, HR.
  • the weft yarn 2 is grasped, laid back and forth, and thus presented to the knitting tools by the rotating yarn guides 4 a , 4 b , 4 c , 5 a , 5 b , 5 c of the rotors 4 and 5 of a pair.
  • the weft yarn 2 is laid by the yarn guides 4 a , 4 b , 4 c of the rotor 4 in the direction HI (from right to left in FIGS. 2 a , 2 b ) and by the yarn guides 5 a , 5 b , 5 c of the rotary member 5 in the direction HR (from left to right in FIGS. 2 a , 2 b ).
  • the weft yarn 2 is guided alternately by the yarn guides 4 a , 4 b , 4 c of the rotor 4 and the yarn guides 5 a , 5 b , 5 c of the rotor 5 .
  • the weft yarn 2 is taken over by the yarn guide 5 b from the yarn guide 4 a for this purpose, for example.
  • the axis of rotation of the two rotors extends at an acute angle relative to the direction of movement RZ of the latch needles 7 .
  • the two rotors of a pair are provided eccentrically parallel to the row of knitting tools.
  • the warp-knitting machine is embodied as an RR Raschel warp-knitting machine with two rows of knitting tools.
  • the warp-knitting machine has an apparatus for loading a weft yarn for each of the two rows.
  • the second example corresponds to the first example except for the features described below.
  • FIG. 4 shows a schematic illustration of a section of a narrow strip of a warp-knit fabric KG.
  • the warp-knit fabric KG is composed of nine stitch-forming warp yarns 1 and one weft yarn 2 .
  • FIG. 1 shows a cutaway row of stitches and nine complete rows of stitches.
  • the weft yarn 2 is guided around all of the stitches of a row.
  • the weft yarn 2 is guided only by a portion of the stitches, namely by four stitches, with two inner weft reversal points 3 i being formed in addition to an additional, outer weft reversal point 3 .
  • FIG. 5 shows the principle of a yarn loader of the device of the second example.
  • the yarn loader comprises a number N of three pairs, each with two rotors 20 , 21 , 30 , 31 , 40 , 41 , each of which has two yarn guides 20 a , 20 b , 21 a , 21 b , 30 a , 30 b , 31 a , 31 b , 40 a , that are guide arms 40 b , 41 a , 41 b .
  • the three pairs are side by side along an entire stroke range BG. Each pair is lays the weft over a partial stroke range BT.
  • the stroke range BT corresponds to the full machine width BG divided by the number N of the pairs, i.e. divided by 3.
  • the stroke range BT of a pair of rotary members 20 , 21 , 30 , 31 , 40 , 41 is 3 cm in this example.
  • the full machine width BG is 9 cm, for example.
  • the weft yarn 2 is laid by one pair of three juxtaposed pairs, each with two rotors 20 , 21 , 30 , 31 , 40 , 41 , over a stroke range BT, which corresponds to the full machine width BG divided by the number N of pairs. This is shown for the top five rows of stitches of the warp-knitted fabric KG shown in FIG. 4 .
  • the weft yarn 2 is laid by the right pair of rotary members 20 , 21 over the right three stitches and by the middle pair of rotary members 30 , 31 over one stitch.
  • the stroke range of a pair of rotary members is from 0.5 cm to 50 cm.
  • Such warp-knit fabrics can be used in lightweight construction, for example for composite structures in wind turbines or in automobiles.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US16/614,438 2017-06-26 2018-06-13 Loading yarns into a textile machine Abandoned US20200109498A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102017114133.2 2017-06-26
DE102017114133.2A DE102017114133A1 (de) 2017-06-26 2017-06-26 Vorrichtung und Verfahren zum Vorlegen von Fäden, Textilmaschine
PCT/EP2018/065699 WO2019001969A1 (de) 2017-06-26 2018-06-13 Vorrichtung und verfahren zum vorlegen von fäden und textilmaschine

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113026194A (zh) * 2021-03-04 2021-06-25 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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018127736A1 (de) * 2018-11-07 2020-05-07 Hochschule Niederrhein Vorrichtung und Verfahren zum Vorlegen eines Fadens

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Publication number Priority date Publication date Assignee Title
DE1268305B (de) 1963-11-22 1968-05-16 Heinrich Kalbskopf Fa Kettenwirkmaschine, insbesondere Raschelmaschine, mit einer Langschusseinrichtung
DE1635815B2 (de) * 1967-04-19 1974-01-10 Industriewerk Schauenstein, Inh. Hellmut Waldenfels, 8671 Schauenstein Raschelmaschine mit Langschußfadenlegevorrichtung
DE1920477A1 (de) 1968-07-11 1970-11-12 Reiners Walter Dr Ing Kettenwirkmaschine
DE1785269A1 (de) * 1968-09-04 1972-03-30 Reiners Walter Dr Ing Kettenwirkmaschine
FR2030555A6 (de) * 1968-11-02 1970-11-13 Reiners Walter
DE1941726A1 (de) * 1969-08-16 1971-02-25 Reiners Walter Dr Ing Kettenwirkmaschine
DE2035007A1 (de) 1970-07-15 1972-01-20 W. Schlafhorst & Co, 4050 Mönchengladbach Vorrichtung zum Bereitlegen von Schußfäden an Kettenwirkmaschinen
DE2263561A1 (de) * 1972-12-27 1974-07-04 Schlafhorst & Co W Schussfadenspeicher fuer kettenwirkmaschinen
DE2401050A1 (de) 1974-01-10 1975-07-17 Liba Maschf Kettenwirkmaschine, insbesondere raschelmaschine
CH644162A5 (de) * 1979-07-12 1984-07-13 Textilma Ag Maschine fuer die herstellung flaechenhafter textilien, mit einem um eine schwenkachse schwenkbaren fadenfuehrer oder fadenumlenkorgan und verfahren zum betrieb der maschine.
DE8302278U1 (de) 1983-01-28 1984-07-12 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Aufspulmaschine
DE10029666A1 (de) * 2000-06-23 2002-01-03 Mayer Malimo Textilmaschf Legevorrichtung zur Herstellung mehrschichtiger Fadengelege
EP2028307B1 (de) * 2007-08-23 2010-03-31 Liba Maschinenfabrik GmbH Verfahren und Vorrichtung zum Aufbringen einer unidirektionalen Lage aus Fäden auf Längsförderer, Verfahren zum Vorlegen von Schussfäden an Kettenwirkmaschinen sowie Vorrichtung zur Durchführung dieser Verfahren
JP5741823B2 (ja) * 2011-03-25 2015-07-01 三菱レイヨン株式会社 経編機及び編物の製造方法
EP3141642A1 (de) * 2015-09-10 2017-03-15 Textilma Ag Webmaschine zur herstellung von webgut mit eingearbeiteten wirk- oder legefäden

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113026194A (zh) * 2021-03-04 2021-06-25 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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Publication number Publication date
EP3645774A1 (de) 2020-05-06
CN110770379A (zh) 2020-02-07
EP3645774B1 (de) 2021-08-18
WO2019001969A1 (de) 2019-01-03
DE102017114133A1 (de) 2018-12-27
CN110770379B (zh) 2021-07-09

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