EP2270270B1 - Procédé sans extraction destiné au tricotage sur un métier circulaire de fils d'acier, dispositif de tricotage sans extraction sur un métier circulaire de fils d'acier et section de tuyau en tricot de fils d'acier - Google Patents

Procédé sans extraction destiné au tricotage sur un métier circulaire de fils d'acier, dispositif de tricotage sans extraction sur un métier circulaire de fils d'acier et section de tuyau en tricot de fils d'acier Download PDF

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Publication number
EP2270270B1
EP2270270B1 EP10006832.9A EP10006832A EP2270270B1 EP 2270270 B1 EP2270270 B1 EP 2270270B1 EP 10006832 A EP10006832 A EP 10006832A EP 2270270 B1 EP2270270 B1 EP 2270270B1
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EP
European Patent Office
Prior art keywords
wire
needles
knitting
loop
tubular portion
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
EP10006832.9A
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German (de)
English (en)
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EP2270270A1 (fr
Inventor
Erwin Appel
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.)
Rhodius GmbH
Original Assignee
Rhodius GmbH
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Filing date
Publication date
Application filed by Rhodius GmbH filed Critical Rhodius GmbH
Publication of EP2270270A1 publication Critical patent/EP2270270A1/fr
Application granted granted Critical
Publication of EP2270270B1 publication Critical patent/EP2270270B1/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
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/88—Take-up or draw-off devices for knitting products
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/06—Sinkers
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/42—Circular knitting machines with independently-movable needles specially adapted for producing goods of particular configuration
    • D04B9/44—Circular knitting machines with independently-movable needles specially adapted for producing goods of particular configuration elongated tubular articles of small diameter, e.g. coverings for cables

Definitions

  • the invention relates to a method for circular knitting at least one wire to a tube section with multiple courses. Furthermore, the invention relates to a wire circular knitting device for circular knitting according to the inventive method and a hose section of wire mesh.
  • the at least one wire of the circular knitting machine is fed continuously, wherein the guided in a common needle carrier needles to form the new stitches of a course pull the wire through the stitches of the previously formed course, while the needles strip the previously held stitches of the previously formed row of stitches and release them in sections.
  • needles is understood in this context knitting needles, which are particularly well suited for the entanglement of wires.
  • the tube is cut by means of a separator, such as a cutting knife, in hose sections of defined length. Since the courses show a helical course in the circular knitting, it is impossible in the cutting process, especially in very fine-meshed wire knit to separate the courses so that not sections of several courses are cut simultaneously. This has the consequence that immediately after the cutting of the knitted wire a plurality of separated stitch residues, the so-called chaff, remain in the tube section. Since the use of hose sections with chaff hanging in it is undesirable, the chaff hanging in the hose section must be removed with great effort, either mechanically for example by everting or manually as completely as possible.
  • Another major disadvantage of the known method is the very high loss of material.
  • the material content of chaff based on the total amount of entangled wire is up to 10%, so that a material loss of 10% must be taken into account, which in particular in wires made of very high quality materials, such as precious metals, the cost of the final product in addition elevated.
  • Another problem with the known knitting method is that neither a clearly defined length of the tube section nor a clearly defined weight of the tube section can be predetermined by the inaccurate cutting process. Rather, relatively large tolerances must be specified so that the manufactured tube sections can be used at all to a sufficient extent.
  • this object is achieved by a method having the features of claim 1. Furthermore, the object is achieved by a device having the features according to claim 7 and by a hose section made of wire mesh with the features of claim 11.
  • An essential idea of the invention is that, unlike previously customary, already the first row of stitches as well as all other subsequent rows of stitches which are produced during the knitting process are grasped with the aid of conveying elements arranged between the needles and conveyed away inwards from the needles. This makes it possible, on the one hand, to end the knitting process by separating or capping the wire at any time and to promote the knitted tube section from the circular knitting machine, on the other hand, the knitting process can be restarted again without much effort. So only a loose end of the Detected wire from one of the needles of the circular knitting machine and the wire from the other needles to a meandering first row of stitches are transformed.
  • the further fed wire is entangled by the needles with the previously formed first course to a subsequent course of stitches, as usual, pulling the needles to form the new stitches of the subsequent course the wire through the stitches of the previously formed first course.
  • the needles strip the previously held stitches of the previously formed first row of stitches and release them in sections, the respective released portion of the previously formed first row of stitches being grasped by the conveying elements arranged between the needles and being conveyed inwardly away from the needles.
  • This process is also continued in the other courses to be formed, wherein the already knitted hose section is continuously transported away by the conveying elements from the region of the needles.
  • the first time it is possible for the first time to dispense with the withdrawal device customary in the prior art. Furthermore, it is possible for the first time to dispense with the problematic cutting of the tube made of wire mesh, as is usual and necessary in the prior art. Also eliminates the usual in the art elaborate Anstricken.
  • no chaff is produced.
  • the length of the tube section is determined only by capping the wire at a predetermined length and continuing the knitting operation. In this way, it is possible for the first time by the invention to manufacture tube sections with a precisely defined length or precisely defined weight in hitherto unreachable tolerance ranges. The mentioned material loss of up to 10% of the wire material to be entangled is completely eliminated. Even complex extraction devices or cutting devices are obsolete.
  • the conveying elements release the previously conveyed previously formed row of stitches only when they grip the row of stitches formed below and convey it inwards away from the needles. This ensures that due to the stiffness of the wire material already formed and from the conveyor elements wegge redesignte stitch row does not jump back and hinders the knitting process.
  • wires with a comparatively thick wire cross-section is also proposed to preform the supplied wire to support the stitch formation, for example by the wire is guided immediately before the knitting by a corresponding preforming device and then handed over to the needles for entangling.
  • a handling device for example, a robot is suitable.
  • the invention relates to a wire circular knitting device for the deduction-free circular knitting of at least one wire to a wire knit tube.
  • the device comprises a needle carrier on which a plurality of identical needles are guided, which are controlled by means of a needle control according to a predetermined knitting movement.
  • a feed device for feeding the at least one wire and a device for removing the hose is provided.
  • the device for removing the hose as a discharge device is formed by a plurality of conveying elements movably guided between the knitting needles on the needle carrier, which for detecting the respectively immediately before released from the knitting needles sections of the previously formed course and for conveying away the released sections inwardly away from the Serve knitting needles.
  • the conveying elements are preferably moved by a control device coupled to the needle control of the needles in accordance with a predetermined sequence of movements.
  • the needle control is designed so that the conveying elements detect the respectively released sections according to the knitting movements of the needles and transport them away inwards into the needle carrier.
  • the conveying elements are preferably actuated by a respective actuator associated with each conveying element. It is also conceivable, however, a common control by a common actuator, such as a control disc with control grooves.
  • each have a conveyor element is provided so that each web mesh between each two shared mesh can be detected by a conveyor element.
  • Each conveyor element is advantageously designed in each case as at least one at least approximately at right angles with respect to the direction of movement of the knitting needles movable slider.
  • the invention relates to a tubular section made of knitted wire, which is knitted from at least one wire section, wherein the tube section has a predetermined defined length, which results exclusively by capping the wire section during the feeding of the wire section during knitting.
  • the hose section is chopper-free immediately after the knitting process and has only one separate permanent wire end open at each of its two ends per wire section.
  • the wire of the wire knit forming the tube section is deformed at least in sections between the stitches. This deformation is generated in particular by the conveying elements, which detect the wire mesh during the circular knitting defined.
  • the hose section may consist of a monoform wire, a multi-filament wire, a stranded wire or stranded wires depending on the application.
  • the wire section may have a round, oval, flat or even polygonal cross-sectional shape.
  • the tube section produced in this way can be converted into any type of molded part, for example in filter inserts for gas generators of airbags.
  • Fig.1 shows a sectional side view of an apparatus 10 according to the invention for the trigger-free circular knitting of wires.
  • the device 10 has a substantially hollow cylindrical needle carrier 12 having on its outer peripheral surface 14 a plurality of straight, identical guide grooves (not shown).
  • the guide grooves are uniformly spaced from one another on the outer peripheral surface 14 and extend parallel to the longitudinal axis of symmetry of the needle carrier 12.
  • a needle 16 for entangling wires is guided longitudinally displaceable.
  • the needles 16 are controlled in a known manner by a needle control 18, which is in the form of a pushed onto the needle carrier 12, rotatable relative to this control cylinder 20, in its peripheral surface corresponding control grooves (not shown) are formed, which cooperate with the needles 16 ,
  • each have an adjusting groove 22 is formed between each two guide grooves on the in Fig. 1 shown upper end face of the needle carrier 12 .
  • Fig. 2 shows, in which a portion of the device 10 is shown in a perspective view, the parking grooves 22 extend radially with respect to the longitudinal axis of symmetry of the needle carrier 12 and serve to guide each of a slide 24 formed as a conveying element.
  • Each slide 24 has on its the needle carrier 12 end facing a gripping portion 26, whose function will be explained later.
  • the slides 24 are actuated by a slide control 28 designed in the form of a control ring provided with control grooves and coupled to the needle control 18 of the needles 16.
  • a slide control 28 designed in the form of a control ring provided with control grooves and coupled to the needle control 18 of the needles 16.
  • Each slider 24 is, depending on the position of each adjacently arranged needles 16 by means of the slider control 28 between a radially outwardly disposed position in which the slider 24 is arranged with its gripping portion 26 radially further out than the respectively adjacent needles 16, and a radially inwardly disposed position in which the slider 24 protrudes with its gripping portion 26 in the needle carrier 12, displaced in the adjusting groove 22.
  • the free end of the wire is fed to the needle carrier 12 by means of a feeding device, not shown, until one of the needles 16 detects the wire. Subsequently, the wire is continuously supplied in a conventional manner by either the feeder is rotated about the needle carrier 12 or the Needle carrier 12 rotates about its longitudinal axis of symmetry, the other needles 16 grasp the wire in a conventional manner, thereby forming the wire to a meandering course row due to the shape of the needle carrier 12 and the shape of the needles 16.
  • the actual knitting operation begins, in which the needles 16 entangle the further fed wire with the previously formed first course to form a subsequent course of stitches. This is done by the needles 16 to form the new stitches of the subsequent courses pull the wire through the stitches of the previously formed first course, while the needles 16 strip the previously held stitches of the previously formed first courses and continuously release the previously formed first course series sections , The respective released portion of the previously formed course is now continuously detected by the sliders 24 by the slides 24 are moved from its radially outer position to the radially inner position, wherein the gripping portions 26 detect the released portions and inwardly of the needles 16 away in the hollow cylindrical needle carrier 12 promote.
  • the sequence described above is repeated, whereby the released sections of the previously formed stitch row are respectively grasped by the slides 24 and conveyed inwards into the needle carrier 12 during stitch formation of the following row of stitches.
  • the portion held by the slides 24, which has already been conveyed away beforehand is released and pressed downwards into the needle carrier 12 by the section subsequently detected.
  • This stripping movement is additionally assisted by a rounded edge 30 extending over the entire circumference, which forms the transition of the end face of the needle carrier 12 into the inner peripheral surface of the hollow cylinder of the needle carrier 12.
  • the method according to the invention and the device 10 according to the invention it is possible for the first time to easily apply wires, since the hitherto required removal of the already knitted tube section is completely eliminated. Furthermore, with the method according to the invention and the device 10 according to the invention, it is possible for the first time to produce a hose section of defined length and defined weight in very tight manufacturing tolerances, without the hose section having to be shortened to the desired length only after knitting by appropriate cutting devices. Rather, to form a defined length of a hose section only the supplied wire must be cut and the knitting process continued until the fabricated tube section of the device 10 can be removed or falls out of this by its own weight.

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

Claims (16)

  1. Procédé sans extraction destiné au tricotage sur un métier circulaire d'au moins un fil métallique pour produire une portion de tuyau avec plusieurs rangées de mailles, dans lequel procédé :
    lors de l'opération de démarrage du tricotage, une extrémité libre du fil métallique est saisie par l'une des aiguilles (16) du métier à tricoter circulaire (10) et le fil métallique est mis en forme par les autres aiguilles (16) pour former une rangée de mailles en méandres,
    lors de l'opération suivante de tricotage, les aiguilles (16) tricotant le fil métallique acheminé ensuite avec la rangée de mailles respectivement formée préalablement en formant une rangée de mailles suivante, par le fait que les aiguilles (16), pour former les nouvelles mailles de la rangée de mailles suivante, tirent le fil métallique à travers les mailles de la rangée de mailles préalablement formée, tandis que les aiguilles (16) enlèvent les mailles retenues préalablement de la rangée de mailles formée préalablement et libèrent en partie la rangée de mailles formée préalablement, la portion respectivement libérée de la rangée de mailles formée préalablement étant saisie par des éléments de transport (24) disposés entre les aiguilles (16) et étant transportée à l'écart des aiguilles (16) vers l'intérieur, et
    à la fin de l'opération de tricotage, le fil métallique acheminé est coupé et l'opération suivante de tricotage est poursuivie jusqu'à ce que la portion de tuyau ne soit plus saisie par les aiguilles (16) et les éléments de transport (24).
  2. Procédé selon la revendication 1, dans lequel les éléments de transport (24) libèrent la rangée de mailles formée préalablement transportée à l'écart seulement lorsqu'ils saisissant la rangée de mailles formée ensuite et la transportent à l'écart des aiguilles (16) vers l'intérieur.
  3. Procédé selon la revendication 1 ou 2, dans lequel le fil métallique acheminé est préformé pour favoriser la formation de mailles, de préférence immédiatement avant le tricotage.
  4. Procédé selon la revendication 3, caractérisé en ce que le fil métallique est préformé en forme de méandres, la préforme en forme de méandres correspondant approximativement à la forme de l'allure des mailles.
  5. Procécé selon l'une quelconque des revendications 1 à 4, dans lequel l'extrémité formée en premier de la portion de tuyau est saisie au moyen d'un dispositif de manipulation et, à la fin de l'opération de tricotage, est enlevée du métier à tricoteur circulaire.
  6. Procécé selon l'une quelconque des revendications 1 à 5, dans lequel l'extrémité libre du fil métallique est mise en forme de crochet pour l'opération de démarrage du tricotage.
  7. Dispositif de tricotage circulaire de fil métallique pour le tricotage circulaire sans
    extraction d'au moins un fil métallique pour produire un tuyau tricoté en fil métallique selon un procédé selon l'une quelconque des revendications 1 à 6, comprenant
    un porte-aiguilles (12) sur lequel plusieurs aiguilles identiques (16) sont guidées pour tricoter le fil métallique,
    une commande d'aiguilles (18) pour commandeur les aiguilles (16) en fonction d'un mouvement de tricotage prédéfini,
    un dispositif d'acheminement pour acheminer l'au moins un fil métallique, et un dispositif (24) pour évacuer le tuyau tricoté avec le fil métallique,
    caractérisé en ce que
    le dispositif pour évacuer le tuyau est un dispositif d'évacuation constitué de plusieurs éléments de transport (24) guidés de manière déplaçable entre les aiguilles (16) sur le porte-aiguilles (12), lesquels, pour saisir la portion respective de la rangée de mailles formée préalablement qui vient juste d'être libérée par les aiguilles (16) et pour évacuer vers l'intérieur les portions libérées à l'écart des aiguilles (16), peuvent être déplacés d'une position située radialement à l'extérieur dans une position située radicalement à l'intérieur.
  8. Dispositif selon la revendication 7, caractérisé par un dispositif de commande (28) accouplé à la commande d'aiguilles (18) des aiguilles (16) pour déplacer les éléments de transport (24) en fonction d'un déroulement de déplacement prédéfini.
  9. Dispositif selon la revendication 7 ou 8, caractérisé en ce qu'entre deux aiguilles respectives adjacentes (16) est à chaque fois prévu un élément de transport (24).
  10. Dispositif selon la revendication 7, 8 ou 9, caractérisé en ce que chaque élément de transport est au moins un coulisseau (24) déplaçable au moins approximativement à angle droit par rapport au sens de déplacement des aiguilles (16).
  11. Portion de tuyau en tricot en fil métallique, qui est tricotée à partir d'au moins une portion de fil métallique, en particulier en utilisant un procédé défini dans les revendications 1 à 6,
    l'au moins une portion de fil métallique, formant la portion de tuyau finie, présentant une longueur définie prédéfinie qui s'obtient exclusivement par découpage de la portion de fil métallique pendant l'acheminement de la portion de fil métallique lors du tricotage, et la portion de tuyau étant exempte de brins hachés immédiatement après l'opération de tricotage et présentant au niveau de chacune de ses deux extrémités, pour chaque portion de fil métallique, seulement à chaque fois une extrémité de fil métallique ouverte séparée non amovible.
  12. Portion de tuyau selon la revendication 11, caractérisée en ce que la portion de fil métallique du tricot en fil métallique formant la portion de tuyau est déformée entre les mailles au moins en partie par l'opération d'extraction.
  13. portion de tuyau selon la revendication 11 ou 12, caractérisée en ce que la portion de fil métallique se compose d'un fil métallique monoforme, d'un fil métallique multifilament, d'un fil métallique en forme de cordon ou de fils métalliques câblés.
  14. Portion de tuyau selon la revendication 11, 12 ou 13, caractérisée en ce que la portion de fil métallique présente une forme en section transversale ronde, ovale, plate ou polygonale.
  15. Portion de tuyau selon l'une quelconque des revendications 11 à 14, caractérisée en ce que les formes des mailles et/ou le nombre des mailles varient par rangée de mailles et/ou la largeur des mailles varie dans le tricot en fil métallique.
  16. Portion de tuyau selon l'une quelconque des revendications 11 à 15, caractérisée en ce que la portion de tuyau a été mise en forme pour former une pièce façonnée.
EP10006832.9A 2009-07-01 2010-07-01 Procédé sans extraction destiné au tricotage sur un métier circulaire de fils d'acier, dispositif de tricotage sans extraction sur un métier circulaire de fils d'acier et section de tuyau en tricot de fils d'acier Active EP2270270B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200910031395 DE102009031395B4 (de) 2009-07-01 2009-07-01 Abzugsfreies Verfahren zum Rundstricken von Drähten sowie Vorrichtung zum abzugsfreien Rundstricken von Drähten

Publications (2)

Publication Number Publication Date
EP2270270A1 EP2270270A1 (fr) 2011-01-05
EP2270270B1 true EP2270270B1 (fr) 2015-09-09

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EP10006832.9A Active EP2270270B1 (fr) 2009-07-01 2010-07-01 Procédé sans extraction destiné au tricotage sur un métier circulaire de fils d'acier, dispositif de tricotage sans extraction sur un métier circulaire de fils d'acier et section de tuyau en tricot de fils d'acier

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DE (1) DE102009031395B4 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012013263B4 (de) 2012-07-03 2018-09-27 Rhodius Gmbh Verfahren zur Herstellung eines aus Metalldraht gefertigten, ringförmigen Dämpfungselementes sowie Verfahren zur Herstellung eines Entkopplungselementes mit einem derartigen Dämpfungselement
US9540752B2 (en) * 2013-03-01 2017-01-10 Acs Industries, Inc. Tinkle-free knitted wire mesh filters and methods for making such filters
DE102019118546B4 (de) * 2019-07-09 2021-07-29 Dietrich Denker Drahtkörper und Verfahren zur Herstellung eines Drahtkörpers

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB902171A (en) * 1957-08-10 1962-07-25 Max Nebel Improvements in and relating to the manufacture of stockings
NL268795A (fr) * 1960-09-12
DE4305547C2 (de) * 1993-02-24 2002-04-04 Rhodius Gmbh Drahtgestrickschlauch sowie Verfahren und Vorrichtung zu dessen Herstellung
DE10147402C1 (de) * 2001-09-26 2003-05-15 Umfotec Umformtechnik Gmbh Drahtkörper und Verfahren zur Herstellung eines Drahtkörpers
DE10316702A1 (de) * 2003-04-08 2004-10-28 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Verfahren und Strickmaschine zur Herstellung von Strickwaren, insbesondere aus hartem, unelastischem Fadenmaterial
DE202004021773U1 (de) * 2004-10-27 2010-11-25 Diedrichs, Helmut W. Filamentverbund aus Metall sowie Formkörper aus Metall
DE102006005384B4 (de) * 2006-02-03 2009-02-05 Groz-Beckert Kg Abzugskamm für Strick- oder Wirkmaschine

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DE102009031395B4 (de) 2012-05-24
EP2270270A1 (fr) 2011-01-05

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