EP2347044B1 - Disques de frottement - Google Patents

Disques de frottement Download PDF

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Publication number
EP2347044B1
EP2347044B1 EP09747823.4A EP09747823A EP2347044B1 EP 2347044 B1 EP2347044 B1 EP 2347044B1 EP 09747823 A EP09747823 A EP 09747823A EP 2347044 B1 EP2347044 B1 EP 2347044B1
Authority
EP
European Patent Office
Prior art keywords
friction
friction disc
grooves
thread
groove
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
EP09747823.4A
Other languages
German (de)
English (en)
Other versions
EP2347044A1 (fr
Inventor
Gustave Akakpo
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.)
Ceramtec GmbH
Original Assignee
Ceramtec 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 Ceramtec GmbH filed Critical Ceramtec GmbH
Publication of EP2347044A1 publication Critical patent/EP2347044A1/fr
Application granted granted Critical
Publication of EP2347044B1 publication Critical patent/EP2347044B1/fr
Active legal-status Critical Current
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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/04—Devices for imparting false twist
    • D02G1/08—Rollers or other friction causing elements
    • D02G1/082—Rollers or other friction causing elements with the periphery of at least one disc
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/04—Devices for imparting false twist

Definitions

  • the invention relates to a friction disk for use in a false twist device for false twist generation on a running multifilament yarn, in particular synthetic yarn, in which the yarn runs over the friction surface of the friction disk.
  • False twist devices are generally used to generate the false twist, in which case the thread is drawn over the peripheral surfaces, the friction surfaces, and rotating friction discs which overlap. The speeds of the friction discs can reach up to 14,000 rpm.
  • Such false twist devices are for example from the DE 27 08 204 B known.
  • the friction discs may consist of different materials, wherein, depending on the material and roughness of the friction surface, the threads are subjected to different levels of stress.
  • Friction discs made of a hard material such as ceramic or metal usually produce abrasion and therefore stress the threads stronger than, for example, soft friction discs made of polyurethane, which experience through the threads wear. While the friction discs made of hard materials can usually last well over seven years, the polyurethane friction discs need to be replaced after about 8 to 9 months.
  • friction discs made of hard materials have the disadvantage that the surface structure of the peripheral surface, the friction surface, is increasingly smeared and smoothed by the thread abrasion, which is called glacing effect.
  • the object of the invention is to introduce a friction disk which is as gentle on the thread as a friction disk made of soft material and nevertheless has a service life such as a friction disk made of a hard material.
  • the friction disk has at least one recess which reduces the friction surface on its friction surface
  • the contact surface of the disk with the yarn is interrupted and divided into several sections.
  • the abrasion and thus the risk of blending the entire friction surface, the Glacing effect are completely avoided or at least significantly reduced because the abrasion no longer, as usual, at the edges, at the transitions from the friction surface to the plan top. and bases of the friction disk settles.
  • the friction surface is interrupted and thereby form each two new transitions, whereby the discontinuation of the abrasion is distributed over more places. This in turn contributes significantly to the reduction of yarn breaks.
  • the recess is a groove.
  • the groove is circumferentially formed on the peripheral surface of the friction disk, that is, the friction disk has at least one extending over the entire circumference of the friction disk groove. But there may also be several circumferential grooves.
  • the friction surface has two grooves. The grooves can be arranged at equal distances from the edge of the friction disk and from each other. Another distance arrangement depends on the number of grooves, their depth and width. The grooves can be the same. The grooves can be endless.
  • the grooved friction discs according to the invention have the same width as the conventional friction discs. By the grooves but the looped by the thread surface, the friction surface is reduced. For example, if the friction disk has a width of 9 mm, the actual friction surface of two grooves of 1.5 mm width decreases to 6 mm, although the theoretically wrapped surface still remains 9 mm. For this reason, the friction discs according to the invention are particularly suitable for microfilaments and for high texturing speeds, which can be up to 1000 m / min and higher.
  • the cross section of the grooves may be, for example, V-shaped, U-shaped or rectangular.
  • a different arrangement of the grooves, their width or depth, may be provided depending on the yarn path and thread material.
  • the contact surface of the disc is interrupted with the thread and divided into several sections.
  • the abrasion and thus the risk of blending the entire friction surface, the Glacing effect are inventively completely avoided or at least considerably reduced, because the abrasion no longer, as usual, at the edges, at the transitions from the friction surface to the plane upper - and undersides of the friction disc settles.
  • the friction surface is interrupted and thereby form each two new transitions, whereby the discontinuation of the abrasion is distributed over more places. This in turn contributes significantly to the reduction of yarn breaks.
  • a uniform yarn path is achieved with a constant yarn tension, such as For example, in the false twist generation on a polyamide yarn, PA6 78/18 black, and a yarn of polybutylene terephthalate, PBT 42/24 glossy, has been demonstrated.
  • the yarn tension is in front of and behind a friction disk according to the invention at the same or somewhat lower level as in a polyurethane disk and remains constant even after a long service life.
  • the material of the friction disc and its width, the number of grooves, their width and their depth can be adjusted.
  • transitions of the grooves to the friction surface are rounded so that the thread runs over no sharp edges.
  • the thread run is also the rounding radius of the friction surface to the flat surfaces, the side surfaces, the friction disc.
  • the surface roughness of the friction surface is, matched to the thread material, preferably between 0.1 .mu.m and 2.0 .mu.m, preferably at 0.85 .mu.m.
  • the material is an oxide ceramic, such as alumina.
  • the material may also be a metal or a plastic.
  • FIG. 1 is a friction disk 1 according to the invention in an enlarged scale, partially cut, shown.
  • the diameter 2 is 52 mm and the width 3 is 9 mm.
  • the peripheral surface, the friction surface 4 is rounded, in the present embodiment with a radius 5 of about 6 mm ( Fig. 2 ). The caused by this radius wrap angle allows a gentle threadline.
  • the friction disk 1 has two grooves 6 on the friction surface 4.
  • the FIG. 2 shows a section of the friction surface 4 in an even enlarged scale.
  • the grooves 6 are both gleichgeartet and have a width 7 of about 1.5 mm, a depth of about 3 mm and an opening angle 9 of the side walls 10 to the friction surface 4 out of 10 degrees.
  • the center distance 11 of the grooves 6 from each other is 4 mm and their center distance 12 from the edge 13 2.5 mm.
  • the transitions 14 of the side walls 10 of the grooves 6 to the friction surface 4 are rounded off.
  • the radius of these transitions 14 in a preferred embodiment is equal to or less than 0.3 mm.
  • 0.2 mm have been found for the radius of the transitions 14 to be particularly advantageous.
  • the surface roughness Ra of the friction surface in In one embodiment, the area of the yarn path is preferably 0.85 ⁇ 0.2 ⁇ m.
  • oxide ceramics such as zirconium oxide, silicon oxide, or nitride ceramics such as silicon nitride or SiAlONs.
  • metallic materials for example of molybdenum or chromium-nickel steels
  • the friction surfaces can be protected against wear by hard deposits of ceramic or diamond.
  • the idea according to the invention of introducing grooves into the friction surface of a friction disk can actually be applied to all materials suitable for friction disks.
  • the thread tension T1 before the false twist device, could be reduced by 10% to 20% compared to conventional friction discs.
  • the friction groove according to the invention with two grooves is almost insensitive to changes in the D / Y ratio, the ratio of wheel peripheral speed to yarn speed.
  • groove or grooves are that they run helically, such as a thread, on the peripheral surface of the friction disk.
  • the course of the groove or grooves may be identical to the direction of rotation of the friction disc or opposite her.
  • the grooves can be catchy or more continuous (parallel to each other). Beginning and end of the groove or grooves can, seen in the axial direction, lie one above the other or from each other.
  • a thread of a groove may have less than one turn, one turn or more than one turn.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Claims (12)

  1. Disque de friction destiné à être utilisé dans un dispositif de fausse torsion pour produire une fausse torsion sur un fil multibrin circulant, en particulier un fil synthétique, dans lequel le fil circule sur la surface de friction du disque de friction, le disque de friction (1) présentant sur sa surface de friction (4) au moins un évidement réduisant la surface de friction (4), caractérisé en ce que l'évidement est une rainure (6) et la rainure (6) est formée tout autour de la surface périphérique du disque de friction (1).
  2. Disque de friction selon la revendication 1, caractérisé en ce que la surface de friction (4) présente deux rainures (6).
  3. Disque de friction selon la revendication 1 ou 2, caractérisé en ce que la surface de friction (4) est arrondie.
  4. Disque de friction selon l'une des revendications 1 à 3, caractérisé en ce que la rugosité de surface Ra de la surface de friction (4) dans la zone de circulation du fil est comprise entre 0,1 µm et 2 µm, de préférence égale à 0,85 µm.
  5. Disque de friction selon l'une des revendications 1 à 4, caractérisé en ce que le matériau du disque de friction est une céramique oxydée.
  6. Disque de friction selon la revendication 5, caractérisé en ce que le matériau est de l'oxyde d'aluminium.
  7. Disque de friction selon l'une des revendications 1 à 4, caractérisé en ce que le matériau est un métal ou une matière plastique.
  8. Disque de friction selon l'une des revendications 1 à 7, caractérisé en ce que la rainure ou les rainures s'étendent en hélice, comme un filetage, sur la surface périphérique du disque de friction.
  9. Disque de friction selon la revendication 8, caractérisé en ce que la rainure ou les rainures s'étendent dans le sens de rotation du disque de friction ou dans un sens opposé à celui-ci.
  10. Disque de friction selon la revendication 8 ou 9, caractérisé en ce que la rainure ou les rainures sont à pas simple ou à pas multiple.
  11. Disque de friction selon l'une des revendications 8 à 10, caractérisé en ce que le début et la fin de la rainure ou des rainures, vus en direction axiale, sont superposés ou décalés l'un par rapport à l'autre.
  12. Disque de friction selon l'une des revendications 8 à 11, caractérisé en ce qu'un pas de filetage d'une rainure fait moins d'un tour, un tour ou plus d'un tour.
EP09747823.4A 2008-11-04 2009-11-03 Disques de frottement Active EP2347044B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102008043439 2008-11-04
DE102009026723 2009-06-04
PCT/EP2009/064536 WO2010052213A1 (fr) 2008-11-04 2009-11-03 Disque de friction

Publications (2)

Publication Number Publication Date
EP2347044A1 EP2347044A1 (fr) 2011-07-27
EP2347044B1 true EP2347044B1 (fr) 2015-01-07

Family

ID=41720579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09747823.4A Active EP2347044B1 (fr) 2008-11-04 2009-11-03 Disques de frottement

Country Status (5)

Country Link
EP (1) EP2347044B1 (fr)
JP (1) JP5669743B2 (fr)
CN (1) CN102272364B (fr)
DE (1) DE102009046352A1 (fr)
WO (1) WO2010052213A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009037221A1 (de) * 2009-08-12 2011-02-17 Emil Bröll GmbH & Co. Friktionsscheibe für Falschdrahttexturiermaschinen
CN102839453B (zh) * 2012-08-22 2017-04-05 陈子瑜 单锭驱动轮盘假捻纺纱的装置
CN103894368B (zh) * 2014-03-14 2016-01-27 泉州天宇化纤织造实业有限公司 一种假捻器陶瓷工作盘的表面附着物清洗方法
DE102015114659A1 (de) * 2015-09-02 2017-03-02 Maschinenfabrik Rieter Ag Stützscheibe mit balliger Lauffläche
CN109402812A (zh) * 2019-01-02 2019-03-01 绍兴华晶科技有限公司 一种多孔陶瓷假捻盘组件

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3327463A (en) * 1964-08-27 1967-06-27 Teijin Ltd Method and apparatus for imparting false twist to continuous filaments by frictionalcontact
CH543613A (de) * 1972-04-11 1973-10-31 Heberlein & Co Ag Friktions-Falschdrallvorrichtung
DE2444038C3 (de) * 1973-10-01 1980-04-17 Heberlein Maschinenfabrik Ag, Wattwil (Schweiz) Friktions-Falschdrallvorrichtung
DE2428514B1 (de) * 1974-06-12 1975-09-18 Kugelfischer G Schaefer & Co Reibscheibe fuer den Reibantrieb von hochtourig umlaufenden Falschdrall-Drehroehrchen
DE2431101B1 (de) * 1974-06-28 1975-10-16 Ernst Fr. Weinz-Weka Ohg, 6580 Idar- Oberstein Friktionselement für eine Falschdrallvorrichtung
DE2708204C2 (de) 1977-02-25 1979-04-05 Feldmuehle Ag, 4000 Duesseldorf Falschdrallvorrichtung
US4129980A (en) * 1978-01-18 1978-12-19 Macfield Texturing, Inc. Friction discs for false-twist head
CN2207393Y (zh) * 1994-09-21 1995-09-13 刘桂兰 一种假捻器摩擦盘
JP3329622B2 (ja) * 1995-06-08 2002-09-30 京セラ株式会社 フリクションディスク
JP3564877B2 (ja) * 1996-06-11 2004-09-15 村田機械株式会社 Ｓｚ同時仮撚用円盤
JPH10183432A (ja) * 1996-12-20 1998-07-14 Teijin Ltd 仮撚ディスク
DE102005050068A1 (de) * 2005-10-19 2007-04-26 Saurer Gmbh & Co. Kg Friktionsscheibe
CN201136929Y (zh) * 2007-11-21 2008-10-22 四川福斯表面技术有限公司 假捻摩擦盘

Also Published As

Publication number Publication date
CN102272364B (zh) 2015-02-18
DE102009046352A1 (de) 2010-05-06
JP2012507642A (ja) 2012-03-29
WO2010052213A1 (fr) 2010-05-14
CN102272364A (zh) 2011-12-07
JP5669743B2 (ja) 2015-02-12
EP2347044A1 (fr) 2011-07-27

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