EP2230343B1 - Wirkwerkzeugbarre - Google Patents

Wirkwerkzeugbarre Download PDF

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Publication number
EP2230343B1
EP2230343B1 EP20090003944 EP09003944A EP2230343B1 EP 2230343 B1 EP2230343 B1 EP 2230343B1 EP 20090003944 EP20090003944 EP 20090003944 EP 09003944 A EP09003944 A EP 09003944A EP 2230343 B1 EP2230343 B1 EP 2230343B1
Authority
EP
European Patent Office
Prior art keywords
longitudinal direction
knitting
bar
fibre
angle
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.)
Not-in-force
Application number
EP20090003944
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2230343A1 (de
Inventor
Oliver Dr. Franke
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.)
Karl Mayer Textilmaschinenfabrik GmbH
Original Assignee
Karl Mayer Textilmaschinenfabrik GmbH
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 Karl Mayer Textilmaschinenfabrik GmbH filed Critical Karl Mayer Textilmaschinenfabrik GmbH
Priority to EP20090003944 priority Critical patent/EP2230343B1/de
Priority to ES09003944T priority patent/ES2370963T3/es
Priority to CN2009102038939A priority patent/CN101838884B/zh
Publication of EP2230343A1 publication Critical patent/EP2230343A1/de
Application granted granted Critical
Publication of EP2230343B1 publication Critical patent/EP2230343B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D04B27/06—Needle bars; Sinker bars
    • 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
    • D04B27/24—Thread guide bar assemblies

Definitions

  • the invention relates to a knitting tool bar having a body which has a longitudinal direction and a wall with at least two UD layers of fiber reinforced plastic, the fibers pointing in different directions, wherein a first UD layer has a fiber direction at an angle in the range of 0 ° to ⁇ 30 ° to the longitudinal direction.
  • the invention relates to a warp knitting machine with such a knitting tool bar.
  • Knitting machines usually have several bars that carry knitting tools.
  • knitting tools for example knitting needles, hole needles, milling plates, pile boards, deburring boards, etc.
  • a bar carries guide needles in the form of piercing needles, then it must stitch in a stitch forming cycle in the direction of the longitudinal extent the knitting machine once and be moved once. Under certain circumstances, a pivoting transverse to the longitudinal extent of the knitting machine is added. Other bars are only moved transversely to the longitudinal extent of the knitting machine or in other directions. In all cases, you must accelerate the bar from standstill and decelerate to reach the final position of the bar in a cycle again. The larger the mass of the barre, the larger the forces required to accelerate and decelerate the bar.
  • Knitting machine can have working widths that extend over several meters, for example, over 6 m. In order to be able to work satisfactorily, the respective bar needs a certain mechanical stability. Incidentally, this also applies to shorter lengths. On the other hand, you want to keep the mass of the bar as low as possible in order to operate the knitting machine at high speeds. In addition, the Barre should not change its shape even under changing environmental conditions. For example, a change in length caused by a temperature change should be kept as small as possible. It has therefore been proposed to form the body of the bar with the aid of plastic, being used as a plastic fiber-reinforced plastic. A proven possibility is to use a semi-finished, which is designed as a so-called "UD layer".
  • a UD layer has reinforcing fibers oriented in one direction only.
  • the reinforcing fibers are embedded in a matrix which can be cured by supplying pressure, temperature, a hardener or the like. You drape several UD layers on top of each other in a form wherein the fiber directions are different from each other. An appropriate procedure is for example in DE 10 2006 005 703 A1 described.
  • the fibers extend parallel to the longitudinal direction of the bar.
  • the term "parallel" is not to be understood in a mathematically narrow sense here. It is used for simplicity and is also intended to include orientations that include an angle in the range of 0 ° to ⁇ 30 ° with the longitudinal axis.
  • the fibers serve to absorb forces acting in the longitudinal direction of the bar.
  • Other UD layers whose fiber directions are not parallel to the longitudinal direction of the bar cause certain properties in other directions. In particular, the fiber directions affect the bending and torsional stiffness as well as the circumferential rigidity of the bar.
  • the invention has for its object to improve bar properties.
  • each additional UD layer has a fiber direction, which includes an angle of maximum 50 ° with the longitudinal direction.
  • the fibers of all UD layers extend so that they enclose an angle of at most 50 ° to the longitudinal direction, then the bar in the circumferential direction becomes relatively yielding. It deforms more when applying the lid, so that settling phenomena are compensated without the required biasing force is lost.
  • Another advantage is that the UD layers are easier to drape, so you can insert them into the mold. Namely, the UD layers are more rigid in one direction parallel to the fiber direction than in other directions. The easier it is to arrange the UD layers in the mold, the lower the likelihood of erroneous positioning when inserting the UD layers. The probability that the barre in the finished state receives the desired structure is thus greater.
  • the lower circumferential stiffness is readily acceptable because the circumferentially acting forces are relatively low in operation.
  • each of the further UD layers has a fiber direction which encloses an angle of at most 45 ° with the longitudinal direction.
  • the fibers of the UD layers are aligned even further in the longitudinal direction.
  • they also have some component in the circumferential direction.
  • the circumferentially acting component of the fibers is at most as large as the component acting in the longitudinal direction.
  • At least two of the further UD layers have fiber directions which are directed in the same direction.
  • the fibers of a second UD layer include an angle of + 45 ° with the longitudinal direction
  • the fibers of a third UD layer include an angle of -45 ° with the longitudinal direction.
  • At least one of the further UD layers has a fiber direction which encloses an angle of at least 15 ° with the longitudinal direction. This ensures that a fiber component is also guided in the circumferential direction, which has a favorable effect on certain stiffnesses.
  • the UD layers have a fiber volume fraction in the range of 50 to 70%. So you use a fiber content, which occupies at least half of the volume in any case. Since the fibers absorb most of the forces acting on the bar, good stiffness values can be achieved here.
  • a proportion in the range of 30 to 50% of the fibers is aligned parallel to the longitudinal direction. This results in a very high load capacity the bar in the longitudinal direction, which is particularly advantageous in a guide bar, which must be accelerated in the longitudinal direction.
  • an outer UD layer and an inner UD layer have a fiber direction that is parallel to the longitudinal direction.
  • the further UD layer or the further UD layers are then embedded between the outer and the inner layer. As a result, the risk is kept small that the other layers are damaged.
  • the invention also relates to a warp knitting machine with such a knitting tool bar.
  • Such a warp knitting machine can achieve high working speeds. In addition, it can be operated over a relatively long period of time without changing the image of the knitted fabric produced.
  • a plurality of active tool bars are provided, whose knitting tools work together, wherein at least two active-tool bars each have a body with a wall whose construction is the same with respect to the fiber directions. If the body with respect to the fiber directions of the UD layers is the same, then the ingot will behave at least approximately the same under the same environmental influences, so that, for example, the risk of collision of knitting tools remains small.
  • needle bar 1 has a body 2, which has at least one wall 3, which encloses a cavity 4.
  • the body 2 has a holding region 5, on which several knitting needles 6 are attached.
  • the knitting needles 6 are arranged one behind the other in a direction perpendicular to the plane of the drawing. Accordingly, only one knitting needle 6 can be seen.
  • the knitting needles 6 are clamped by means of a cover 7 on the body 2.
  • the cover 7 is thereby held by means of a screw 8 which is screwed into an insert 9, on the holding portion 5.
  • the screw 8 is tightened with a certain tension.
  • the body 2 also has an underside 10 into which a fastener 11 is inserted.
  • the fastening element 11 has an internal thread 12 into which a screw bolt (not shown in detail) can be screwed in order to fasten the knitting needle bar 1 in a warp knitting machine (not shown).
  • a UD layer 21 has a group of parallel fibers 22 which run parallel or up to an angle of at most 30 ° to the longitudinal extent of the knitting needle bar 1. It does not have to be a parallelism in the mathematically exact sense.
  • the fibers 22 extend so that they can absorb forces occurring in the longitudinal direction of the Barre 1.
  • such a UD-layer 21 is also referred to as "0 ° -Lage”.
  • the longitudinal direction is designated by an arrow 23. It extends into Fig. 1 perpendicular to the drawing plane.
  • Another UD layer 24 also has fibers 25 which extend parallel to the longitudinal direction of the bar 1.
  • the UD layer 21 is located inside the body 2, i. it surrounds the cavity 4, while the UD layer 24 is arranged on the outside of the body 2.
  • the UD layer 26 has fibers 28 which extend at an angle + ⁇ of, for example, + 45 ° to the longitudinal direction 23.
  • the UD layer 27 has fibers 29 which extend at an angle - ⁇ , for example -45 °, to the longitudinal direction 23.
  • the stack 20 of UD layers 21, 24, 26, 27 thus has at least one UD layer 21, 24 whose fibers 22, 25 extend parallel or at an angle of at most ⁇ 30 ° to the longitudinal direction 23 of the bar 1, and UD layers 26, 27 whose fibers 28, 29 are at an angle of a maximum of ⁇ 50 °, preferably even a maximum of ⁇ 45 °, extend to the longitudinal direction 23.
  • a UD layer with fibers that enclose an angle of 90 ° to the longitudinal direction 23 is absent.
  • the directional component of the fibers 28, 29 extending in the circumferential direction is at most equal to the component of the fibers 28, 29 which extends parallel to the longitudinal direction 23.
  • the UD layers with the structure of the Fig. 2 easier to drape in a form, because the individual UD layers 21, 24, 26, 27 can be bent more easily in the illustrated arrangement.
  • the barre shown has an anisotropic structure.
  • the fibers are expediently carbon fibers. They have on the body 2 a fiber volume fraction in the range of 50 to 70%.
  • the fibers 28, 29, which enclose an angle ⁇ ⁇ with the longitudinal direction 23, are expediently arranged in mirror image.
  • the angle ⁇ is at least 15 ° and is greater than the angle of the fibers, which are aligned in the longitudinal direction.
  • the number of UD layers which is four in the illustrated embodiment, can of course be selected depending on the expected loads on the Barre.
  • a knitted needle bar Shown is a knitted needle bar.
  • a corresponding stack 20 of UD layers can also be used for producing other ingots, for example for producing a guide bar, a Polplatinenbarre, a slide bar or the like.
  • Fig. 2 illustrated stack 20 of UD layers 21, 24, 26, 27 is used, then it is expedient to provide bars whose knitting tools work together with a same structure.
  • the same construction means that the directional distribution of the fibers should be substantially the same.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Knitting Of Fabric (AREA)
  • Moulding By Coating Moulds (AREA)
EP20090003944 2009-03-19 2009-03-19 Wirkwerkzeugbarre Not-in-force EP2230343B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP20090003944 EP2230343B1 (de) 2009-03-19 2009-03-19 Wirkwerkzeugbarre
ES09003944T ES2370963T3 (es) 2009-03-19 2009-03-19 Barra de herramientas de tricotar.
CN2009102038939A CN101838884B (zh) 2009-03-19 2009-05-22 带主体的成圈机件梳栉和具有这种成圈机件梳栉的经编机

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20090003944 EP2230343B1 (de) 2009-03-19 2009-03-19 Wirkwerkzeugbarre

Publications (2)

Publication Number Publication Date
EP2230343A1 EP2230343A1 (de) 2010-09-22
EP2230343B1 true EP2230343B1 (de) 2011-09-28

Family

ID=42140008

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20090003944 Not-in-force EP2230343B1 (de) 2009-03-19 2009-03-19 Wirkwerkzeugbarre

Country Status (3)

Country Link
EP (1) EP2230343B1 (zh)
CN (1) CN101838884B (zh)
ES (1) ES2370963T3 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2623652A1 (de) * 2012-01-31 2013-08-07 Karl Mayer Textilmaschinenfabrik GmbH Wirkwerkzeugbarre und Verfahren zum Erzeugen einer Wirkwerkzeugbarre
DE102016212715A1 (de) * 2016-07-13 2018-01-18 Robert Bosch Gmbh Trägertopf für eine Bremsscheibe, Bremsscheibeneinrichtung
EP3421653B1 (de) * 2017-06-26 2019-09-18 KARL MAYER Textilmaschinenfabrik GmbH Wirkwerkzeugbarre
CN107663710A (zh) * 2017-11-15 2018-02-06 常德纺织机械有限公司 碳纤维针床槽针压板
CN109402859A (zh) * 2018-11-01 2019-03-01 江苏理工学院 经编机混杂纤维空心针芯针床

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20314470U1 (de) * 2003-09-18 2003-11-20 KARL MAYER Malimo Textilmaschinenfabrik GmbH, 09117 Chemnitz Barre aus faserverstärktem Kunststoff-Hohlprofil
EP1770194A1 (de) * 2005-09-28 2007-04-04 KARL MAYER TEXTILMASCHINENFABRIK GmbH Wirkwerkzeug-Barre einer Wirkmaschine
DE102006005703A1 (de) 2006-02-08 2007-08-16 Karl Mayer Textilmaschinenfabrik Gmbh Verfahren zum Herstellen einer Kunststoff-Wirkwerkzeugbarre und Kunststoff-Wirkwerkzeugbarre

Also Published As

Publication number Publication date
ES2370963T3 (es) 2011-12-26
EP2230343A1 (de) 2010-09-22
CN101838884A (zh) 2010-09-22
CN101838884B (zh) 2012-02-08

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