EP0460799A1 - False twist apparatus - Google Patents

False twist apparatus Download PDF

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Publication number
EP0460799A1
EP0460799A1 EP91303743A EP91303743A EP0460799A1 EP 0460799 A1 EP0460799 A1 EP 0460799A1 EP 91303743 A EP91303743 A EP 91303743A EP 91303743 A EP91303743 A EP 91303743A EP 0460799 A1 EP0460799 A1 EP 0460799A1
Authority
EP
European Patent Office
Prior art keywords
pins
roller
twist
yarn
wall
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.)
Withdrawn
Application number
EP91303743A
Other languages
German (de)
English (en)
French (fr)
Inventor
Geoffrey Naylor
Malcolm Geoffrey Hinchliffe
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.)
Rieter Scragg Ltd
Original Assignee
Rieter Scragg Ltd
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 Rieter Scragg Ltd filed Critical Rieter Scragg Ltd
Publication of EP0460799A1 publication Critical patent/EP0460799A1/en
Withdrawn legal-status Critical Current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
    • D02G1/0206—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 by false-twisting
    • D02G1/0266—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 by false-twisting false-twisting machines
    • D02G1/0273—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 by false-twisting false-twisting machines threading up and starting the false-twisting machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/14—Pulleys, rollers, or rotary bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/16—Braked elements rotated by material
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/08—Twist arresters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • This invention relates to false twist apparatus, and in particular to apparatus for use in determining the point, in the path of a textile yarn through a false-twist crimping machine, at which the twisting of the yarn commences.
  • a device is known as a twist-stop, and has the effect of preventing the passage of twist, generated in the yarn by a false-twist device, from travelling upstream of the twist-stop.
  • twist-stop device Many differing types of twist-stop device are known, and many other devices which have another primary function, for example feed rollers, may also serve very satisfactorily as twist-stop devices. However the latter generally do not give the precise control of the yarn which is required in this sensitive area, and it may not be practicable to position them for good twist-stop functioning. Therefore it is customary for false-twist crimping machines to be fitted with devices which have the sole function of twist-stopping. A large proportion of such twist-stopping devices are in the form of a rotatable member around the periphery of which the yarn is caused to pass, such periphery providing a tortuous or zig-zag yarn path. Such twist-stop devices are also of many differing forms.
  • a rotatable disc having at its periphery a series of radial slits whereby oppositely bent blades form a zig-zag V-shaped groove in which the yarn runs.
  • a similar device is shown in GB Registered Design No 895467, comprising a pair of coaxially secured discs with pressed-out ribs between cut-outs on each disc, the ribs on one disc interdigitating with those on the other disc.
  • twist-stops of such a construction tend to abrade the yarn and can cause filament breakages in multi-filament yarns, or even yarn breaks. Alternatively they may become distorted and cease to be effective as a twist stop.
  • the ribs may be stamped out of the discs without slits or cut-outs, as described in GB Patent No 1297097.
  • Such ribs, or lugs may have a rounded cross-section so as to provide for more gentle control of the yarn than was the case with the previously described type of twist-stop device.
  • the control of the yarn in this sensitive area is not as satisfactory as is desired.
  • the sheet metal from which the above described twist stop devices are made tends to wear rapidly under the abrading action of the yarn.
  • twist stop devices there is also known a twist stop comprising a plurality of cylindrical pins secured around the periphery of a roller, which pins are alternately oppositely inclined out of the central plane of the roller to form a V-shaped, zig-zag yarn path around the periphery of the twist stop.
  • the pins are of a ceramic material and of circular cross-section, so that substantially identical size and surface finish can readily be produced on all pins.
  • Such a twist-stop has been used extensively and successfully for more than 17 years. It is easier and less costly to produce than the ceramic-ribbed twist-stop described above, and this is an important factor in yarn texturing since damaged twist-stops, which affect the quality of the textured yarn, are often tolerated due to the high cost of repeated replacement.
  • the invention provides a twist stop device comprising a roller having an array of cylindrical pins of a wear resistant material extending outwardly thereof, with alternate pins being relatively disposed and oppositely inclined relative to a median plane of the roller whereby the array defines a V-shaped, zig-zag yarn path for a yarn running around said device, and the roller comprising a pair of walls disposed adjacent the array of pins on opposed sides thereof and extending radially outwardly of the roller at least to the outer ends of the pins.
  • the pins may be of a ceramic, sapphire, hardened steel or tungsten carbide material, and may be retained in receiving formations provided in the roller.
  • the pins may be clipped or adhesively bonded in the receiving formations, which may be bores or recesses.
  • the walls may be of a plastics material, and may be integral with a hub part of the roller.
  • the roller may be formed in two parts, each comprising a wall and a hub portion.
  • the parts of the roller may be substantially identical, each hub portion comprising half of the hub part.
  • Each hub portion may have a plurality of pin receiving recesses therein, equi-spaced therearound, and interdigitating formations may be provided on said two hub portions.
  • a plurality of interdigitating formations may each be provided with one pin receiving recess therein.
  • Each wall may comprise a peripheral lip which extends over at least part of the outer ends of those pins inclined towards that wall.
  • Each wall may also comprise an inwardly directed surface which is inclined relative to the median plane of the device and contacts those pins inclined towards that wall over the length of those pins.
  • the pins may be inclined at an angle of between 15 o and 30 o , for example 20 o , relative to the median plane, and each pin may have a diameter of substantially 1mm.
  • the pins may be disposed at equi-angularly arranged locations, and there may be at least one more location than pins in the device. There may be two diametrically opposed locations at which no pin is provided, for example 40 pins may be provided at 42 equi-angularly arranged locations.
  • a slot may be provided in the walls, which slot may extend radially inwardly substantially to the hub part.
  • the device may be of comparatively small overall diameter, for example up to 50mm, and may be substantially 36 mm in diameter.
  • the device may comprise a bearing axially located in the hub part.
  • the interdigitating formations may be formed so as to resist separation of the two parts, or the two parts may be secured to each other as by an adhesive, welding or by screws or rivets.
  • At least one spigot may be formed on one of the hub portions, and for the or each spigot a bore be provided in the other of the hub portions, the or each bore being adapted to receive a spigot therein.
  • the or each bore may have a counterbore part into which an enlarged head of a spigot, formed after assembly of the roller, is received.
  • the half device 11 which may be moulded of a plastics material, comprises a wall 12 and a half hub part 13, the latter having a through bore 14 and a counterbore 15 into which a ball bearing 16 (not shown in Fig 2) is fitted.
  • the half hub part 13 is formed to have a plurality of alternating , radially extending ribs and recesses, 17 and 18 respectively which can interdigitate with corresponding formations on another half 19 (Fig 3) of the twist stop device 10.
  • 21 ribs 17 and 21 recesses 18, all of equi-angular extent, are formed around the half hub part 13, although other numbers of ribs and recesses may be provided if desired.
  • the ribs 17 and recesses 18 of the two twist-stop halves 11, 19 may be formed so as to resist separation of the two halves 11, 19 when assembled as shown in Fig 3. However welding, eg ultrasonic welding, or adhesive bonding of the two halves 11, 19 is preferred. Alternatively the two halves 11, 19 may be secured to each other by screws or rivets.
  • ribs 17 and twenty of the recess 18 are formed semi-circular grooves 20, 21 respectively, the remaining rib 171 and recess 181 which are not provided with grooves being diametrically opposed.
  • a pin 22 of circular cross-section is fitted into each of the grooves 20 Into each of the grooves 20 .
  • the grooves 20 and the inwardly directed surface 23 are inclined relative to the median plane 24 of the assembled twist stop 10 (Fig 3) at an angle of substantially 20 o , the surface 23 being aligned with the bottom of the recesses 18 so as to support the pins 22 over their entire length.
  • a peripheral rib 25 extends over approximately half of the outer ends of the pins 22 so as to prevent the pins 22 from flying out of the twist stop 10 as it rotates.
  • the pins 22 are of a hard wearing material such as ceramic, sapphire, hardened steel or tungsten carbide, and because of their simple shape, can readily be manufactured, ground and polished to the required dimensions and surface finish.
  • the pins 22 may be clipped or adhesively bonded into the grooves 20.
  • the device 28 comprises a male part 29 (Figs 4 and 5) and a female part 30 (Figs 6 and 7), which have many features corresponding with features of device 10 previously described. Such corresponding features are referenced with corresponding reference numerals.
  • three spigots 31 are provided on the male part 29, to be received in three correspondingly positioned bores 32 in the female part 30, instead of the previously described interdigitating formations.
  • the bores 32 each have a counterbore 33 to accommodate an enlarged head 34, of a spigot 31, formed after assembly of the two parts 29, 30.
  • the bearing 16 is fitted to the counterbores 15 during such assembly.
  • blind bores 35 in the hub part 13 of the male part 29 receive the inner ends of alternate pins 22, whilst the remainder of the pins 22 have their inner ends received in a part circular groove formed between two ribs 36 also provided on the hub part 13 of the male part 29. Corresponding pairs of ribs 36 are also provided on the hub part 13 of the female part 30. The outer ends of the pins 22 are received in similar groove/two rib formations 37 provided at alternate pin locations on the male and female parts 29, 30 respectively adjacent the peripheral rib 25.
  • the two twist stop halves 11, 19 or parts 29, 30, when assembled, ensure that the array of pins 22 provide a V-shaped, zig-zag path for a yarn 27 passing around the twist stop 10 or 28.
  • the accurately produced pins 22 minimise damage to the yarn 27. Since the pins 22 are retained and protected by the peripheral ribs 25, there is less likelyhood of the twist stop being damaged, and hence replacement is less frequent than was the case with known pinned twist stops. Furthermore, since threading is easier and yarn displacement is less likely due to the presence of the walls 12, the pins 22 may be shorter than was the case heretofore, thereby making the present twist-stop less costly to manufacture than the known twist stops. Cheaper twist stops are more likely to be replaced when damaged, and therefore less poor quality yarn is likely to be produced.
  • the present twist stop is lighter than known twist-stops, thereby ensuring longer bearing life and hence less frequent twist stop replacement. Furthermore a lighter twist stop is able to be accelerated to its operating speed by finer yarns without yarn breakage, than is the case with known heavier twist stops.
  • twist stop in accordance with the invention will be readily apparent to persons skilled in the art.
  • the pins may be inserted in holes in the periphery of a single hub part, and the two wall parts then secured to the hub part by an adhesive, by welding or by screws.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
EP91303743A 1990-05-26 1991-04-25 False twist apparatus Withdrawn EP0460799A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9011879 1990-05-26
GB909011879A GB9011879D0 (en) 1990-05-26 1990-05-26 False twist apparatus

Publications (1)

Publication Number Publication Date
EP0460799A1 true EP0460799A1 (en) 1991-12-11

Family

ID=10676669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91303743A Withdrawn EP0460799A1 (en) 1990-05-26 1991-04-25 False twist apparatus

Country Status (3)

Country Link
EP (1) EP0460799A1 (ja)
JP (1) JPH04228633A (ja)
GB (2) GB9011879D0 (ja)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998033963A1 (de) * 1997-02-04 1998-08-06 Barmag Ag Falschdrall-texturiermaschine
WO1999001369A1 (en) * 1997-07-02 1999-01-14 Morgan Matroc Limited Thread guiding wheels
US6430911B1 (en) * 1998-10-12 2002-08-13 Barmag, Ag Yarn texturing machine
EP1378594A1 (de) * 2002-07-04 2004-01-07 SPINDELFABRIK SÜSSEN SCHURR, STAHLECKER & GRILL GmbH Zuführrolle für einen Kernfaden eines Coregarnes
WO2007000230A1 (de) * 2005-06-24 2007-01-04 Oerlikon Textile Gmbh & Co. Kg Drallstopvorrichtung
ES2316276A1 (es) * 2006-04-10 2009-04-01 Maschinenfabrik Rieter Ag Rodillo de alimentacion para procesar un hilo de alma para obtener un entramado de fibras cortadas.
CN102534899A (zh) * 2010-11-06 2012-07-04 欧瑞康纺织部件有限公司 止捻辊
CN103991775A (zh) * 2013-05-22 2014-08-20 林谊忠 一种防滑绳轮
CN111762632A (zh) * 2020-07-02 2020-10-13 临沂矿业集团菏泽煤电有限公司 钢丝绳稳定纠偏装置及纠偏方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106757588B (zh) * 2017-01-19 2022-12-02 南通芙嘉图纺织机械有限公司 一种止捻器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE488928A (ja) *
US2714494A (en) * 1953-09-23 1955-08-02 Specialties Dev Corp Yarn tension compensating device
GB1297097A (ja) * 1970-02-27 1972-11-22

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB758055A (en) * 1954-05-25 1956-09-26 Glanzstoff Ag Improvements relating to thread-guiding rollers
GB908112A (en) * 1959-02-20 1962-10-17 Klinger Mfg Co Ltd Improvements in or relating to yarn controlling devices
BE624247A (ja) * 1961-12-05

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE488928A (ja) *
US2714494A (en) * 1953-09-23 1955-08-02 Specialties Dev Corp Yarn tension compensating device
GB1297097A (ja) * 1970-02-27 1972-11-22

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1178139A3 (de) * 1997-02-04 2002-12-11 B a r m a g AG Falschdrall-Texturiermaschine
US6209302B1 (en) 1997-02-04 2001-04-03 Barmag Ag False twist texturizing machine
EP1178139A2 (de) * 1997-02-04 2002-02-06 B a r m a g AG Falschdrall-Texturiermaschine
CN1079853C (zh) * 1997-02-04 2002-02-27 巴马格股份公司 假捻变形机及变形方法
WO1998033963A1 (de) * 1997-02-04 1998-08-06 Barmag Ag Falschdrall-texturiermaschine
WO1999001369A1 (en) * 1997-07-02 1999-01-14 Morgan Matroc Limited Thread guiding wheels
US6408608B1 (en) 1997-07-02 2002-06-25 Morgan Advanced Ceramics Limited Thread guiding wheels
US6494029B2 (en) 1998-10-12 2002-12-17 Barmag Ag Yarn texturing machine
US6430911B1 (en) * 1998-10-12 2002-08-13 Barmag, Ag Yarn texturing machine
EP1378594A1 (de) * 2002-07-04 2004-01-07 SPINDELFABRIK SÜSSEN SCHURR, STAHLECKER & GRILL GmbH Zuführrolle für einen Kernfaden eines Coregarnes
WO2007000230A1 (de) * 2005-06-24 2007-01-04 Oerlikon Textile Gmbh & Co. Kg Drallstopvorrichtung
ES2316276A1 (es) * 2006-04-10 2009-04-01 Maschinenfabrik Rieter Ag Rodillo de alimentacion para procesar un hilo de alma para obtener un entramado de fibras cortadas.
CN101070650B (zh) * 2006-04-10 2011-07-06 里特机械公司 用于将芯线输送给短纤维须条的喂料辊
CN102534899A (zh) * 2010-11-06 2012-07-04 欧瑞康纺织部件有限公司 止捻辊
CN102534899B (zh) * 2010-11-06 2015-11-11 苏拉部件有限公司 止捻辊
CN103991775A (zh) * 2013-05-22 2014-08-20 林谊忠 一种防滑绳轮
CN111762632A (zh) * 2020-07-02 2020-10-13 临沂矿业集团菏泽煤电有限公司 钢丝绳稳定纠偏装置及纠偏方法

Also Published As

Publication number Publication date
GB9011879D0 (en) 1990-07-18
GB9108913D0 (en) 1991-06-12
JPH04228633A (ja) 1992-08-18
GB2244289A (en) 1991-11-27

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