WO2022152469A1 - Corps d'aiguille, ensemble aiguille à coulisse et métier chaîne - Google Patents

Corps d'aiguille, ensemble aiguille à coulisse et métier chaîne Download PDF

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Publication number
WO2022152469A1
WO2022152469A1 PCT/EP2021/084711 EP2021084711W WO2022152469A1 WO 2022152469 A1 WO2022152469 A1 WO 2022152469A1 EP 2021084711 W EP2021084711 W EP 2021084711W WO 2022152469 A1 WO2022152469 A1 WO 2022152469A1
Authority
WO
WIPO (PCT)
Prior art keywords
hook
needle body
needle
upper edge
warp knitting
Prior art date
Application number
PCT/EP2021/084711
Other languages
German (de)
English (en)
Inventor
Torsten Butz
Original Assignee
Groz-Beckert Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Groz-Beckert Kg filed Critical Groz-Beckert Kg
Priority to JP2023556567A priority Critical patent/JP2024515935A/ja
Priority to CN202180090460.6A priority patent/CN116783343A/zh
Priority to KR1020237024092A priority patent/KR20230130656A/ko
Publication of WO2022152469A1 publication Critical patent/WO2022152469A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B23/00—Flat warp knitting machines
    • D04B23/16—Flat warp knitting machines specially adapted for producing fabrics, or article blanks, of particular form or configuration
    • 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
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/02—Knitting tools or instruments not provided for in group D04B15/00 or D04B27/00
    • D04B35/06—Sliding-tongue needles

Definitions

  • Warp knitting machines and the associated knitting tools are known in various designs. Warp knitting machines are cost-intensive capital goods. Likewise, many different types of warp knitted fabrics are known for different applications. Not every version of a warp knitting machine is suitable for the production of any type of warp knitted fabric, so that a new warp knitting machine sometimes has to be procured for the production of a new type of warp knitted fabric. Due to the associated high costs for the knitters, the manufacturers of warp knitting machines strive to offer machines that can be used for many different types of warp knitted goods. That is why modern warp knitting machines have extensive control software with which a large number of parameters of the warp knitting machine can be adjusted.
  • US20150361603A1 discloses detailed procedures for designing and setting up a warp knitting machine for the production of a given warp knitted fabric.
  • the size of the needle stitch can be influenced to a certain extent, for example, by the interaction of yarn supply and fabric take-off.
  • the geometric dimensions of the knitting tools have a direct influence, for example, on the size of the needle stitches of the warp-knitted fabric and thus on the appearance of the warp-knitted fabric.
  • certain dimensions of the knitting tools such as the needles, slides and sinkers, are fixed by the drive movement or can only be partially changed independently of each other. Up until now, almost without exception, only one needle type has been available on the market for each generation of a machine type in a particular gauge.
  • the known knitting tools in particular sliding needles comprising needle body and Sliders, with certain functional dimensions, have uniform values regardless of the gauge of the warp knitting machine on which they are used.
  • GB512850 shows a needle with a slider arranged underneath the needle body. Due to this special arrangement, the geometry of the needle body is subject to certain boundary conditions.
  • FR936411 shows a needle in which the needle body and slider are formed from tubular stock. Sliding needles shaped in this way cannot be used on modern, high-speed warp knitting machines because the tubular cross-sections do not have sufficient bending moment in the direction of loading.
  • the aim of the present invention is to expand the possible uses of a warp knitting machine for producing different warp knitted goods by providing novel knitting tools and arrangements of knitting tools.
  • a needle body according to the invention comprises a shank, which is delimited by two parallel flat sides arranged opposite one another, to which a thickness direction of the needle body is perpendicular, and by an upper edge and a lower edge.
  • the needle body further includes a hook for receiving yarn sections.
  • the needle body is set up for a sliding needle arrangement of a warp knitting machine.
  • a driving portion of the shank is adapted for attaching the needle body to a driving device of a warp knitting machine.
  • the drive section of the shank of a needle body in a warp knitting machine is held together with other needle bodies, mostly of the same construction, in a drive device of the warp knitting machine, for example in a bar, and clamped in particular between its upper edge and its lower edge under screw pretension and with its opposite flat sides supported in a groove of a bar against lateral tilting.
  • the shank advantageously has a rectangular contour with rounded edges.
  • the driving section can fix a rear end of the needle body in a longitudinal direction.
  • a lower edge of the hook is located opposite and remote from a bent-back portion of the hook.
  • hooks of knitting tools are structures bent by about 180°, so that a part that is bent back by (about 180°) results, which is arranged opposite a part that is not bent. This structure does not have to be made by bending, the term "bent" is only used to describe the geometry.
  • the lower edge of the hook extends at least in a longitudinal direction of the needle body.
  • the lower edge of the hook generally runs at least partially in an approximately straight line, at least in relation to the bent-back region.
  • Such a straight or approximately straight area defines the longitudinal direction of the needle body.
  • the longitudinal direction is perpendicular to the thickness direction and a height direction of the needle body also perpendicular to the thickness direction.
  • the upper edge of the hook lies above the lower edge of the hook in the vertical direction.
  • “above” and “below” are to be understood in the present document.
  • the hook forms the front end of the needle body in the longitudinal direction. Since the needles of warp knitting machines are generally not guided in a tool carrier so that they can be displaced longitudinally and as a rule do not move in a straight line during the knitting process either, the definition of a longitudinal direction and the vertical direction perpendicular thereto is arbitrary, at least to a small extent, if the lower edge of the hook does not have a clear linear part having. Then the longitudinal direction is to be averaged under the bent-back area.
  • the shank of the needle body can run predominantly in the longitudinal direction, but also in one or more bends.
  • An upper edge of the hook is arranged opposite to the lower edge of the hook on the bent-back part of the hook.
  • the top edge of the hook can partially run in a straight line and is preferably inclined by a few degrees, for example up to 5°, to the bottom edge of the hook. This can be advantageous to prevent collisions with the slider.
  • the slider can be supported on the upper edge of the hook or run just above it without touching it when it performs its relative movement to the needle body. The relative movement between The needle body and slide can predominantly take place approximately in the longitudinal direction, with the movement of the needle body and the slide generally not following a straight path.
  • a needle body according to the present invention is characterized in that a hook height to be measured in the longitudinal direction at the position of the maximum distance in the height direction between the lower edge of the hook and the upper edge of the hook is 0.81 mm at maximum and a cross-sectional height measured in a stitch sliding portion perpendicular to the thickness direction to be measured is a maximum of 0.81mm.
  • a hook height of 0.78mm or less can be particularly advantageous.
  • a cross-sectional height in the mesh sliding section of 0.65 mm or less can also be particularly advantageous. Due to the reduced hook height and the reduced cross-sectional height in the stitch sliding section, smaller needle stitches can be produced without the parameters of the warp knitting machine, such as the yarn feed or the fabric take-off, having to be specially adapted to the production of small needle stitches.
  • the cross-sectional height in the mesh sliding section can be 0.7 mm or 0.75 mm, for example.
  • the stitch sliding portion may extend longitudinally from the front end of the needle on the hook to 15mm backward on the shank.
  • the hook may have a maximum extension of 0.26 mm or less perpendicular to the thickness direction at any point or at least half of the arc of the hook in a cross-section.
  • a cross-section of the hook or also of the shank is to be formed as follows: The needle body defines a local central longitudinal axis of the body at every point of its extent due to its overall elongate extent.
  • a cross-section at any point is to be formed perpendicular to this local central longitudinal axis of the body.
  • the central longitudinal axis of the body should generally be perpendicular to the direction of thickness, which is determined by the two flat sides.
  • Needle bodies of knitting tools are in the Usually stamped from steel strip, the thickness direction of the needle body corresponds to the thickness direction of the steel strip from which the knitting tool is stamped.
  • a central portion of the upper edge of the shank of the needle body may be recessed in a central part of the driving portion compared to the two adjacent bearing portions of the upper edge, and the two adjacent bearing portions of the upper edge may lie in a bearing plane.
  • the middle section can have a length of 5 mm or more.
  • the upper edge of the hook of the needle body is between 1.5 mm and 1.6 mm below the bearing plane of the drive section in the height direction.
  • the bent-back part of the hook of the needle body ends with a hook point.
  • the tip of the hook can be rounded and arranged eccentrically to the adjacent bent-back part of the hook.
  • the distance between the tip of the hook and the point of the hook that is furthest away in the longitudinal direction is at least 1.15 mm.
  • the upper edge of the hook, which is arranged on the bent-back part of the hook ends forward in the longitudinal direction, i.e. facing away from the tip of the hook in the longitudinal direction, as soon as the upper edge of the hook has an angle of more than 5° to the longitudinal direction.
  • the bottom edge of the hook also ends forward at the point where the angular deviation from the longitudinal direction is more than 5°.
  • the needle body may have a butt located in the drive portion of the shank.
  • the foot can serve to secure the needle body against displacement by a front edge of the foot being placed against a counter-bearing surface of the drive device.
  • a working distance from this leading edge of the foot to the longitudinally furthest point of the hook may be in the range of 45mm to 49mm.
  • the shank of the needle body may have a slit portion between the drive portion and the hook, in which a slit is made in the upper edge of the shank.
  • the slit can be used to guide a slider under a mesh resting or sliding on the upper edge of the slit section.
  • the slit portion may include the stitch sliding portion.
  • a slit base of the slit can at least partially be aligned with the nearest point of the upper edge of the hook or may lie below a longitudinal line tangent to the nearest point of the top of the hook. This creates free space above the tip of the hook for a pivoting movement of the slide, so that a collision of the slide with the tip of the hook is unlikely.
  • the point of the top of the hook closest to the slot is often not a point of the fillet of the hook tip, but rather the last point of the top of the hook adjoining the fillet of the hook toe.
  • the length of the base of the slot can be curved relative to the longitudinal direction in order to be optimally adapted to the pivoting movement of the slide and thereby not to unnecessarily weaken the shank of the needle body.
  • the compound needle arrangement according to the invention comprises a needle body according to the invention and a slider.
  • the sliding needle arrangement is specially designed for use in a modern warp knitting machine.
  • the slide is arranged relative to the needle body in such a way that a lower edge of the slide is arranged opposite the upper edge of the hook.
  • the sliding needle arrangement is characterized in that a looping length has an amount of 2.3 mm or less.
  • the looping length is to be measured in a cutting plane that is perpendicular to the longitudinal direction and in the longitudinal direction at any point where the upper edge of the hook and the lower edge of the hook are opposite.
  • the amount of looping length corresponds to the length of the shortest closed curve that encloses the cut contour of the hook and the slider.
  • a warp-knitted fabric can be formed with smaller needle stitches than is possible with previously known warp-knitted fabrics, because the looping length together with the cross-sectional height in the stitch sliding section significantly determines the size of the needle stitch when the stitch is to be knocked over the hook and the slider slides.
  • the claimed slide needle arrangement thus relates to an arrangement of needle body and slide as occurs at or around the point in time within a stitch-forming cycle at which a stitch is knocked over. Due to the movement sequences that occur during the knitting process, it is not possible to produce corresponding needle loops with the hitherto known looping lengths of 2.4 mm or greater by selecting certain parameters for, for example, goods take-off or yarn delivery.
  • a new type of warp-knitted fabric can, for example, have a new look due to straighter needle stitches or a greater density due to narrower rows of stitches.
  • the needle body and the slider can be arranged such that there is a safety distance between the upper edge of the hook and a lower edge of the slider. Since both the needle bodies and the sliders in a warp knitting machine are usually fixed to a drive device, contact between the needle body and slider, for example for mutual guidance, is not necessary. Since contact would also entail wear, the needle body and the slider often do not touch in an optimal setting of a slider needle arrangement. The amount of the mutual distance goes into the extent of the wrapping accordingly. The distance can be influenced and in particular reduced by a tension that is applied to the yarn sections.
  • the lower edge of the slider can border on the upper edge of the hook. Contact between the upper edge of the hook and the lower edge of the slider can usually occur in a point-like manner.
  • a looping length of the sliding needle arrangement can then advantageously have an amount of 2.14 mm or less.
  • the looping length is to be measured in a cutting plane that is perpendicular to the longitudinal direction and in the longitudinal direction at any point where the upper edge of the hook and the lower edge of the hook are opposite.
  • the amount of looping length corresponds to the length of the shortest closed curve that encloses the cut contour of the hook and slider.
  • a warp knitting machine is characterized by a large number of sliding needle arrangements according to the invention.
  • At least one sliding needle arrangement can be arranged in the warp knitting machine in such a way that the at least one lower edge of the hook lies at most 0.81 mm below a theoretical line for the upper edge of the hook, which is determined by the gear arrangement of the warp knitting machine.
  • Particular advantages can result if the at least one sliding needle arrangement is arranged in the warp knitting machine in such a way that the at least one lower edge of the hook is at most 0.78 mm below a theoretical line for the upper edge of the hook. This ensures that the warp knitting machine can work with high productivity.
  • At least two needle bodies of the plurality of needle bodies can be secured to a first drive device of the warp knitting machine and/or at least two slides of the plurality of slides can be secured to a second drive device of the warp knitting machine so that they cannot slide relative to one another.
  • FIG. 1 shows a symbolic representation of a needle body in a view in the direction of thickness.
  • Figure 2 shows a cross section of the drive portion of the shank of the needle body of Figure 1.
  • FIG. 3 shows an enlarged, symbolic view of a middle section and bearing sections of the drive section of the needle body of FIG.
  • Figure 4 shows, in an enlarged, symbolic view, the hook and part of the slot portion of the needle body of Figure 1.
  • FIG. 5 symbolically shows a compound needle arrangement comprising the needle body of FIG. 4 and part of a compound.
  • Figure 6 shows a cross-section through the hook and slider of the sliding needle arrangement of Figure 5.
  • FIG. 1 shows a symbolic representation of a needle body 1 in a view in the direction of thickness D.
  • the needle body extends in the longitudinal direction L and the vertical direction H.
  • the shank 2 of the needle body 1 has, in its drive section 8 arranged on the right in Figure 1, a foot 19 with a front edge 18 which can be placed on a drive device of a warp knitting machine.
  • the view in the direction of thickness D is perpendicular to the flat side 3, the opposite flat side 4 can be seen in the cross-sectional representation of FIG.
  • the shank 2 is delimited in the height direction H at the top by an upper edge 5 and in the height direction at the bottom by a lower edge 6 .
  • the shank 2 has a rectangular cross section with slightly rounded edges, which can again be seen in FIG.
  • the needle body 1 On the left in FIG. 1, the needle body 1 has a hook 7 with a bent-back part 10 , an upper edge 11 of the hook and a lower edge 9 of the hook.
  • the front edge 18 of the foot 19 has a working distance 20 in the longitudinal direction L to the most distant point in the longitudinal direction L of the hook 7 .
  • a slot section 21 is arranged between the drive section 8 and the hook 7 .
  • the slit portion 21 includes the stitch sliding portion 32 configured to support and guide stitches on the slit edges of the slit portion 21 .
  • the shaft 2 is in the stitch sliding section 32 executed significantly lower in the height direction H compared to the drive section 8, so that the stitches are not widened.
  • FIG. 3 shows an enlarged, symbolic view of a middle section 13 and bearing sections 14 of the drive section 8 of the needle body 1 of FIG.
  • FIG. 3 shows a middle section 13 of the drive section 8, which is arranged set back in the vertical direction H compared to two adjacent support sections 14 of the shaft 2.
  • the two support sections 14 are flat and lie in a uniform support plane 15, which is shown as a broken line.
  • the middle section 13 is shown in the form of a trough. This trough-shaped design is exemplary and any design is conceivable in which the central section 13 does not touch or penetrate the support plane 15 defined by the adjoining support sections 14 in the height direction H.
  • FIG 4 shows the hook 7 and large parts of the slit section 21 of the needle body 1 of Figure 1 in an enlarged, symbolic view.
  • the bottom edge 9 of the hook is straight and runs in the longitudinal direction L Lower edge of hook 9 inclined.
  • the hook height 12 is thus the maximum distance in the height direction H between the lower edge 9 of the hook and the upper edge 11 of the hook.
  • the slot 22 is indicated by dashed lines.
  • the slot base 23 of the slot 22 lies at least in the vicinity of the hook 7 in the vertical direction H below the top edge of the hook 11 and in particular below the line 24 which is applied tangentially from above to the hook tip 16 in the longitudinal direction L.
  • a cross-sectional height 25 measured in a cross-section of the shank 2 in the slot section 21 and in a direction perpendicular to the thickness direction D is 0.65 mm in the present example.
  • Figure 5 shows symbolically a compound needle assembly 26 comprising the needle body 1 of Figure 4 and a slider 27.
  • the slider 27 is shown in Figure 5 only partially.
  • the slide 27 is cut off upwards in the vertical direction H, since the subsequent geometry of the slide 27 is irrelevant for this invention and any known geometry can therefore be selected.
  • the dashed lines show that the slider 27 is countersunk in the slot 22 .
  • the slider lower edge 28 of the slider 27 is arranged in the vertical direction H above the upper edge 11 of the hook. In this position of the slide needle arrangement 26, a stitch lying on the slide 27 could be knocked off.
  • There is a safety distance 29 between the lower edge 28 of the slide and the upper edge 11 of the hook which can be seen even more clearly in FIG.
  • the theoretical line 30 indicates that the top edge 11 of the hook, when installed in a warp knitting machine, lies on a target line predetermined by the gearing and the associated drive device of the warp knitting machine.
  • Figure 6 shows a cross section through hook 7 with bent-back part 10 and slide 27 of the sliding needle arrangement 26 of Figure 5.
  • the curve is shown by the externally applied closed line 31, the length of which corresponds to the looping length.

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

Abstract

Corps d'aiguille d'un ensemble aiguille à coulisse de métier chaîne comprenant une tige et un crochet. Un bord inférieur de crochet est disposé à l'opposé et à distance d'une partie coudée vers l'arrière du crochet. Un bord supérieur de crochet est disposé à l'opposé du bord inférieur de crochet sur la partie coudée vers l'arrière du crochet. Le corps d'aiguille divulgué est caractérisé en ce qu'une hauteur de crochet, à mesurer dans la direction de la hauteur entre le bord inférieur du crochet et le bord supérieur du crochet et là où la distance est maximale dans la direction longitudinale, est de maximum 0, 81 mm et en ce qu'une hauteur en coupe transversale, à mesurer dans une section de glissement de maille perpendiculairement à la direction d'épaisseur dans une section transversale de la tige, est de maximum 0,81 mm. Un ensemble aiguille à coulisse divulgué comprend un corps d'aiguille selon l'invention et une glissière et présente une longueur d'enlacement de crochet et de glissière de maximum 2,3 mm.
PCT/EP2021/084711 2021-01-13 2021-12-08 Corps d'aiguille, ensemble aiguille à coulisse et métier chaîne WO2022152469A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2023556567A JP2024515935A (ja) 2021-01-13 2021-12-08 針本体、複合針アセンブリ、経編み機
CN202180090460.6A CN116783343A (zh) 2021-01-13 2021-12-08 针体、滑动针组件以及经编机
KR1020237024092A KR20230130656A (ko) 2021-01-13 2021-12-08 니들 본체, 콤파운드 니들 어셈블리 및 경편기

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP21151280.1 2021-01-13
EP21151280.1A EP4029979A1 (fr) 2021-01-13 2021-01-13 Corps d'aiguille, agencement d'aiguille coulissante et métier à mailles jetées

Publications (1)

Publication Number Publication Date
WO2022152469A1 true WO2022152469A1 (fr) 2022-07-21

Family

ID=74180965

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/084711 WO2022152469A1 (fr) 2021-01-13 2021-12-08 Corps d'aiguille, ensemble aiguille à coulisse et métier chaîne

Country Status (6)

Country Link
EP (1) EP4029979A1 (fr)
JP (1) JP2024515935A (fr)
KR (1) KR20230130656A (fr)
CN (1) CN116783343A (fr)
TW (1) TW202237922A (fr)
WO (1) WO2022152469A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB512850A (en) 1938-03-18 1939-09-27 Fnf Ltd Improvements in or relating to knitting machines and to needles for such machines
GB516025A (en) * 1938-06-25 1939-12-20 Fnf Ltd Improvements in the knitting elements of knitting machinery
FR936411A (fr) 1943-03-30 1948-07-20 Fnf Ltd Perfectionnements aux organes de tricotage dans les machines à tricoter
DE2815385B1 (de) * 1978-04-10 1979-03-01 Mayer Fa Karl Kettenwirkmaschine mit Schiebernadeln
EP1767679A1 (fr) 2005-09-22 2007-03-28 Groz-Beckert KG Outil de tricotage
US20150361603A1 (en) 2013-11-08 2015-12-17 Pacific Textiles Limited Warp knitted fabric and method of manufacturing the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB512850A (en) 1938-03-18 1939-09-27 Fnf Ltd Improvements in or relating to knitting machines and to needles for such machines
GB516025A (en) * 1938-06-25 1939-12-20 Fnf Ltd Improvements in the knitting elements of knitting machinery
FR936411A (fr) 1943-03-30 1948-07-20 Fnf Ltd Perfectionnements aux organes de tricotage dans les machines à tricoter
DE2815385B1 (de) * 1978-04-10 1979-03-01 Mayer Fa Karl Kettenwirkmaschine mit Schiebernadeln
EP1767679A1 (fr) 2005-09-22 2007-03-28 Groz-Beckert KG Outil de tricotage
US20150361603A1 (en) 2013-11-08 2015-12-17 Pacific Textiles Limited Warp knitted fabric and method of manufacturing the same

Also Published As

Publication number Publication date
EP4029979A1 (fr) 2022-07-20
KR20230130656A (ko) 2023-09-12
CN116783343A (zh) 2023-09-19
JP2024515935A (ja) 2024-04-11
TW202237922A (zh) 2022-10-01

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