US20160355956A1 - Radial braiding machine, braiding ring, flat braid and method of producing the flat braid - Google Patents

Radial braiding machine, braiding ring, flat braid and method of producing the flat braid Download PDF

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Publication number
US20160355956A1
US20160355956A1 US15/240,129 US201615240129A US2016355956A1 US 20160355956 A1 US20160355956 A1 US 20160355956A1 US 201615240129 A US201615240129 A US 201615240129A US 2016355956 A1 US2016355956 A1 US 2016355956A1
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US
United States
Prior art keywords
braiding
core
yarns
yarn
ring
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.)
Abandoned
Application number
US15/240,129
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English (en)
Inventor
Gregor Baumgart
Karl-Josef Brockmanns
Joerg Wirtz
Martin Leifeld
Bernd Nefigmann
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.)
SGL Kumpers GmbH and Co KG
Original Assignee
SGL Kumpers GmbH and Co 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 SGL Kumpers GmbH and Co KG filed Critical SGL Kumpers GmbH and Co KG
Assigned to SGL KUEMPERS GMBH & CO. KG reassignment SGL KUEMPERS GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BAUMGART, GREGOR, BROCKMANNS, KARL-JOSEF, LEIFELD, MARTIN, NEFIGMANN, BERND, WIRTZ, JOERG
Publication of US20160355956A1 publication Critical patent/US20160355956A1/en
Abandoned legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04C—BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE
    • D04C3/00—Braiding or lacing machines
    • D04C3/02—Braiding or lacing machines with spool carriers guided by track plates or by bobbin heads exclusively
    • D04C3/12—Braiding or lacing machines with spool carriers guided by track plates or by bobbin heads exclusively with means for introducing core threads
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04C—BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE
    • D04C1/00—Braid or lace, e.g. pillow-lace; Processes for the manufacture thereof
    • D04C1/06—Braid or lace serving particular purposes
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04C—BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE
    • D04C3/00—Braiding or lacing machines
    • D04C3/40—Braiding or lacing machines for making tubular braids by circulating strand supplies around braiding centre at equal distances
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04C—BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE
    • D04C3/00—Braiding or lacing machines
    • D04C3/48—Auxiliary devices
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2403/00—Details of fabric structure established in the fabric forming process
    • D10B2403/02—Cross-sectional features
    • D10B2403/024—Fabric incorporating additional compounds
    • D10B2403/0241—Fabric incorporating additional compounds enhancing mechanical properties
    • D10B2403/02411—Fabric incorporating additional compounds enhancing mechanical properties with a single array of unbent yarn, e.g. unidirectional reinforcement fabrics

Definitions

  • the invention relates to a radial braiding machine including a bobbin gear through which stationary yarn and braiding yarn are fed, a braiding ring through which the stationary and braiding yarns are guided, a core to be over-braided and at least one transportation device for transporting the core.
  • the invention also relates to a braiding ring for use in a radial braiding machine and to a flat braid obtained by over-braiding a core using a radial braiding machine with a braiding ring through which yarns are guided by a bobbin gear.
  • the flat braid includes stationary yarns extending in the longitudinal direction of the braid, and braiding yarns interwoven with the stationary yarns and extending at an oblique angle to the stationary yarns, the course of the braiding yarns differing from an ideal, straight course of a nominal layer by an angle of twist and each stationary yarn being at a distance from an adjacent stationary yarn.
  • the invention additionally relates to a method of producing the flat braid.
  • a generic radial braiding machine is disclosed, for example, in German Patent Application DE 2 112 499, corresponding to U.S. Pat. No. 3,599,529, and is equipped with a bobbin gear, through the use of which stationary yarns and braiding yarns are guided to a braiding ring and guided therethrough. Furthermore, a transportation device for transporting a core to be over-braided must be present. The device is likewise moved through the braiding ring. Conventionally, the braiding ring which is always perpendicular to a core having a round cross section, also has a round inside diameter.
  • a radial braiding machine comprising a bobbin gear through which stationary yarn and braiding yarn are fed, the bobbin gear spanning a yarn outlet plane, a braiding ring through which the stationary and braiding yarns are guided, the braiding ring having a non-round internal cross section when projected onto the yarn outlet plane, a core to be over-braided, and at least one transportation device for transporting the core.
  • the point of the deposition of the braiding yarns on the core to be over-braided and the tension of the yarns is influenced by the braiding ring having a non-round internal cross section, that is to say an internal cross section which differs from the circular shape, and more specifically when projected onto a yarn outlet plane which is spanned by the bobbin gear.
  • This can, of course, preferably be brought about by a braiding ring, which itself has a non-round internal cross section, but also by a ring having a round cross section which is mounted in an oblique or twisted manner with respect to the bobbin gear in such a way that only the projection of the internal cross section thereof is not round.
  • This likewise has the effect of a non-round internal cross section.
  • Good results can be achieved by using a braiding ring having an internal cross section with an oval or elliptical shape when projected onto the yarn outlet plane.
  • Another influence on the yarn tension and deposition position of the yarns on the core to improve the braid properties can be achieved on a braiding machine in which the front side of the braiding ring, through which the yarns are substantially diverted, protrudes in regions from the yarn outlet plane which is spanned by the bobbin gear or from a plane which is parallel thereto.
  • the front side protrudes only in regions, but not completely, and to different extents from the yarn outlet plane or the parallel plane in the opposite direction to the transportation direction of the braid core, specific regions of the braiding and stationary yarns are guided in a controlled manner in such a way that they come to rest on the core sooner or later than other yarns, or obtain another tension.
  • Another adjustment and/or fine adjustment can take place by placing the braiding ring in the radial or round braiding machine in a pivoted manner, and more specifically about at least one of two pivot axes which are orthogonal to one another, so that the yarn diverter protrudes to different extents at the points of intersection with one or both of the pivot axes on each side of the braiding ring.
  • the configuration can be selected in such a way that the yarn diverter protrudes to different extents or projects at different heights at all four points of intersection of the pivot axes with the braiding ring.
  • a braiding ring for use in radial or round braiding machines, the front side of which that diverts the stationary and braiding yarns, referred to as the yarn diverter, according to the invention spans an imaginary surface which is curved at least in regions. That is to say that a surface which would be in contact with all of the points of the yarn diversion of the braiding ring would not be a planar, straight surface.
  • a braiding ring of this type can also have in particular an inner contour which differs from the circular shape, preferably an elliptical inner contour.
  • the yarn diverter of a braiding ring of this type can also protrude to different extents at the points of intersection of two intersecting inside diameter axes.
  • a flat braid obtained by over-braiding a core using a radial braiding machine with a braiding ring through which yarns are guided by a bobbin gear.
  • the flat braid comprises stationary yarns extending in a longitudinal direction of the braid, each of the stationary yarns being disposed at a distance from a respective adjacent stationary yarn, and braiding yarns being interwoven with the stationary yarns and extending at an oblique angle to the stationary yarns, the braiding yarns following a course differing from an ideal, straight course of a nominal layer by an angle of twist.
  • the angle of twist is at most +/ ⁇ 3° and is obtained by influencing a position and a time of deposition of the stationary and braiding yarns on the core by modifying the braiding ring from a circular shape taking into consideration a shape of the core, providing the braiding ring with an internal cross section having a non-round shape when projected onto a yarn outlet plane being spanned by the bobbin gear and providing the braiding ring with an inner contour being at a different distance from an outer contour of the core to be over-braided.
  • braiding errors or deviations from the ideal braiding yarn course which are referred to as an S twist or Z twist, are reduced to an angle of twist of at most +/ ⁇ 3°.
  • This can be produced by a braiding method in which the position and time of deposition and the yarn tension are influenced by modifying the braiding ring of the braiding machine from a circular shape, while taking into consideration a core shape to be selected in such a way that the internal cross section of the braiding ring has a non-round shape when projected at least onto the yarn outlet plane which is spanned by the bobbin gear, and the inner contour of the braiding ring is at a different distance from the outer contour of the core to be over-braided.
  • substantially rectangular braiding cores can also be selected, which can also be very flat and thus already come close to the later shape of the flat braid.
  • a flat braid is thus achieved having distances between the stationary yarns with an average standard deviation of only at most 5%, more preferably at most 2%.
  • the average standard deviation is thus the standard deviation of the average distances between the stationary yarns in the flat braid.
  • the deposition of the yarns on the core including the yarn tension can in this case be influenced by using a special construction and/or mounting of the braiding ring so that the front side thereof which diverts the braiding yarns (yarn diverter) protrudes at various positions to different extents over the yarn outlet plane or a plane which is parallel thereto.
  • the braid properties can be influenced in a positive manner when the internal cross section of the braiding ring (when projected at least onto the yarn outlet plane El) differs in an inverse manner from the circular shape, that is to say that the distance thereof from the core at the position of the maximum core cross-sectional dimension is selected so as to be smaller than at the position of the minimum core cross-sectional dimension. It also has a positive effect when the yarn diverter on the front side of the braiding ring protrudes further at the position of the maximum cross-sectional dimension of the core than at the position of the minimum core cross-sectional dimension.
  • a braiding ring having a front side which protrudes to different extents on each side of the maximum and/or minimum cross-sectional dimension of the core, or mounting a braiding ring in such a way that a spatial positioning of this type occurs can also influence the braid in a positive way, in particular when using braiding cores having a longitudinal axis which is not straight.
  • One way of achieving this influence by using the mounting of the braiding ring is to mount the ring in a tilted and/or pivoted manner with respect to the yarn outlet plane.
  • FIG. 1 is a diagrammatic, side-elevational view of a radial braiding machine according to the invention
  • FIG. 2 is a perspective view as seen in the direction II of FIG. 1 ;
  • FIG. 3 is a perspective view and two side-elevational views of the braiding ring of FIG. 1 ;
  • FIG. 4 is a perspective view as seen in the direction IV of FIG. 1 ;
  • FIG. 5 is a diagrammatic, plan view of a flat braid according to the invention.
  • FIG. 6 is a diagrammatic, perspective view of an angle of twist in a braid.
  • FIG. 1 a simplified view of a radial braiding machine which has a bobbin gear 1 from which stationary yarns and braiding yarns 2 , 3 are guided through a yarn-diverting front side 4 , also referred to as a yarn diverter, of a braiding ring 5 and subsequently guided therethrough.
  • a core 6 to be over-braided is pushed through the braiding ring 5 in a transport direction 7 by a transportation device 10 .
  • the then interweaving yarns 2 , 3 are located on the core 6 as a braid, which is only suggested in FIG. 1 .
  • the bobbin gear 1 is annular and spans a yarn outlet plane E 1 .
  • the yarns 2 , 3 emerge from the inside of the bobbin gear 1 , which is only diagrammatically indicated in FIG. 1 .
  • FIG. 2 is an oblique front view as seen from a position II in FIG. 1 , which shows only part of the bobbin gear 1 , but in a much more detailed and perspective view. It can be seen in this figure that the core 6 has a flat, rectangular cross section which is disposed so as to be opposed to an elliptical internal cross section of the braiding ring 5 in the embodiment shown.
  • FIG. 3 is a detailed view of the braiding ring 5 and four retaining elements 8 thereof, through the use of which the ring is attached to the non-illustrated bobbin gear.
  • the braiding ring 5 has not only an oval inside diameter, but also outwardly curved sides 15 on the front side 4 thereof, which protrude from a plane (E 2 ) that is parallel to the yarn outlet plane E 1 (see also FIG. 1 ) which is spanned by the bobbin gear.
  • upper and lower ends 25 of the front side 4 of the braiding ring 5 are aligned with the plane (E 2 ) so that the front side 4 of the braiding ring 5 protrudes from the plane (E 2 ) only in regions, but not all over.
  • the deposition of the braiding and stationary yarns 2 , 3 on the core 6 to be over-braided can be influenced in a targeted manner.
  • the yarn-diverting front side 4 of the braiding ring 5 thus spans an imaginary surface which is curved at least in regions and which clearly differs from a planar, straight surface of conventional braiding rings.
  • a particularity of the braiding machine according to the invention is the fact that the braiding ring 5 as shown in FIG. 4 can be disposed so as to be pivoted by an angle ⁇ with respect to the planes E 1 and (E 2 ).
  • the deposition of the yarns 2 , 3 can be influenced to a greater extent, in particular when using braiding cores 6 which have no straight longitudinal extension or longitudinal axis L, but rather have, for example, a curved one.
  • neither the core nor the yarns are shown in FIG. 4 .
  • the braiding ring 5 can be mounted so as to be pivoted about pivot axes S 1 and S 2 (see FIG. 3 ) which are orthogonal to one another.
  • the pivoted mounting in FIG. 4 corresponds in this case to a mounting in which a distance A 4 between the plane E 1 and the point of intersection of the yarn-diverting front side 4 of the braiding ring 5 with the pivot axis S 2 protrudes the furthest.
  • a distance A 3 on the opposite side is slightly smaller due to the pivoting, and distances A 1 and A 2 (points of intersection with the pivot axis S 1 ) are even smaller due to the special construction of the yarn-diverting front side 4 of the braiding ring 5 .
  • the braiding core 6 is further shown diagrammatically in order to show how the geometry thereof is preferably to be constructed with respect to the braiding ring 5 .
  • an already flat core 6 having a preferably rectangular diameter can be selected.
  • the construction and configuration of the braiding ring 5 with respect to the braiding core 6 has an advantageous effect on the uniformity of the braid to be obtained, in which distances k 1 between a maximum width B of the core 6 are smaller than, preferably substantially smaller, than distances K 2 between the core 6 in the case of a maximum height H of the core 6 and the inside diameter of the braiding ring at each position.
  • the braiding ring 5 is disposed in such a way that the further protruding side regions 15 thereof are to be found at the maximum cross-sectional dimensions of the core 6 , in this case the width B, and the less protruding upper and lower faces 25 are to be found at the positions of the minimum cross-sectional dimension, in this case the height H, of the core 6 .
  • FIG. 5 is a diagrammatic view of a flat braid which is produced on the braiding machine according to the invention.
  • This flat braid can be obtained by flattening the braided sleeve which is produced or by cutting open the sleeve on one or both sides.
  • stationary yarns 2 extend in the longitudinal direction L of the braid, and braiding yarns 3 extend at an oblique angle to the stationary yarns 2 .
  • Distances G also referred to as gaps
  • a uniformity can be achieved so that the average value of the distances G between the stationary yarns 2 is at most 5%.
  • FIG. 6 is a likewise purely diagrammatic illustration of a braid which can be obtained according to the prior art and includes a circular braiding ring, which is located in a plane that is parallel to the plane E 1 .
  • braiding yarns 3 are only shown in one direction, whereas the braiding yarns which are oblique in the opposite direction are not shown therein.
  • the stationary yarns 2 extend in parallel and are aligned only in the perspective shown.
  • the braiding yarns 3 do not have an ideal straight course, which is referred to as a nominal position N, but rather differ from that nominal position N, which is the straight line that cuts through the braiding yarn 3 in the center of the flat braid in the manner of a cross section and extends at a tangent to the braiding yarn 3 , in that they have a curved course in the manner of a stretched letter S. This is referred to as an S twist.
  • An inverse curvature, which is not shown therein, is referred to as a Z twist.
  • the size of the twist is measured in an angle of twist ⁇ which is defined between the nominal position N and a straight line W that is lain through the points at which the braiding yarn 3 is in contact with the two outer stationary yarns 2 .
  • the angle which is spanned between N and W is the angle of twist ⁇ .
  • the uniformity is so high that the angle of twist ⁇ is at most +/ ⁇ 3°.
  • the distances between the stationary yarns 2 clearly decrease from the center of the flat braid towards the outside.
  • the uniformity is so high that the distances between the stationary yarns 2 have an average standard deviation of only at most 5%, preferably at most 2%.
  • the flat braid according to the invention can be produced, which thus meets the high requirements in terms of uniformity.
  • the core 6 which is selected in each case, it is possible to influence the position and time of deposition of the yarns 2 , 3 in order to optimize the braid.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
US15/240,129 2014-02-18 2016-08-18 Radial braiding machine, braiding ring, flat braid and method of producing the flat braid Abandoned US20160355956A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102014202970.8A DE102014202970A1 (de) 2014-02-18 2014-02-18 Radialflechtmaschine und Flachgeflecht
DE102014202970.8 2014-02-18
PCT/EP2015/053414 WO2015124626A1 (de) 2014-02-18 2015-02-18 Radialflechtmaschine und flachgeflecht

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/053414 Continuation WO2015124626A1 (de) 2014-02-18 2015-02-18 Radialflechtmaschine und flachgeflecht

Publications (1)

Publication Number Publication Date
US20160355956A1 true US20160355956A1 (en) 2016-12-08

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US15/240,129 Abandoned US20160355956A1 (en) 2014-02-18 2016-08-18 Radial braiding machine, braiding ring, flat braid and method of producing the flat braid

Country Status (5)

Country Link
US (1) US20160355956A1 (de)
EP (1) EP3108049B1 (de)
DE (1) DE102014202970A1 (de)
ES (1) ES2723424T3 (de)
WO (1) WO2015124626A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180016718A1 (en) * 2015-06-10 2018-01-18 Bayerische Motoren Werke Aktiengesellschaft Braiding Machine
US10526732B2 (en) * 2015-06-10 2020-01-07 Bayerische Motoren Werke Aktiengesellschaft Braiding machine
US11718933B2 (en) 2021-08-18 2023-08-08 The Boeing Company Penta-axial braiding machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3599529A (en) 1970-04-09 1971-08-17 North American Rockwell Defective strand detector means for braiding machines
EP0902114B1 (de) * 1997-09-09 2003-03-26 Murata Kikai Kabushiki Kaisha Führer zum Stabilisieren der Flechtformung an einer Flechtmaschine
DE102010047193A1 (de) * 2010-09-30 2012-04-05 SGL Kümpers GmbH & Co.KG Rundflechtmaschine für das Umflechten eines forlaufend zugeführten Flechtkerns
US8261648B1 (en) * 2011-10-17 2012-09-11 Sequent Medical Inc. Braiding mechanism and methods of use

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180016718A1 (en) * 2015-06-10 2018-01-18 Bayerische Motoren Werke Aktiengesellschaft Braiding Machine
US10526732B2 (en) * 2015-06-10 2020-01-07 Bayerische Motoren Werke Aktiengesellschaft Braiding machine
US10526733B2 (en) * 2015-06-10 2020-01-07 Bayerische Motoren Werke Aktiengesellschaft Braiding machine
US11718933B2 (en) 2021-08-18 2023-08-08 The Boeing Company Penta-axial braiding machine

Also Published As

Publication number Publication date
EP3108049A1 (de) 2016-12-28
WO2015124626A1 (de) 2015-08-27
DE102014202970A1 (de) 2015-08-20
ES2723424T3 (es) 2019-08-27
EP3108049B1 (de) 2019-04-10

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AS Assignment

Owner name: SGL KUEMPERS GMBH & CO. KG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BAUMGART, GREGOR;BROCKMANNS, KARL-JOSEF;WIRTZ, JOERG;AND OTHERS;REEL/FRAME:039704/0094

Effective date: 20160907

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION