EP0519539A1 - Verfahren zur pneumatischen Einfädelung in eine Doppeldraht-Hohlspindel einer Zwirnmaschine - Google Patents

Verfahren zur pneumatischen Einfädelung in eine Doppeldraht-Hohlspindel einer Zwirnmaschine Download PDF

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Publication number
EP0519539A1
EP0519539A1 EP92201569A EP92201569A EP0519539A1 EP 0519539 A1 EP0519539 A1 EP 0519539A1 EP 92201569 A EP92201569 A EP 92201569A EP 92201569 A EP92201569 A EP 92201569A EP 0519539 A1 EP0519539 A1 EP 0519539A1
Authority
EP
European Patent Office
Prior art keywords
hollow mandrel
yarn
spindle
bobbin
basket
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Withdrawn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
EP92201569A
Other languages
English (en)
French (fr)
Inventor
Roberto Badiali
Vittorio Colussi
Gianpaolo Canova
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.)
Savio SpA
Savio Macchine Tessili SpA
Original Assignee
Savio SpA
Savio Macchine Tessili SpA
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 Savio SpA, Savio Macchine Tessili SpA filed Critical Savio SpA
Publication of EP0519539A1 publication Critical patent/EP0519539A1/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/10—Spinning or twisting machines in which the product is wound-up continuously for imparting multiple twist, e.g. two-for-one twisting
    • D01H1/105—Arrangements using hollow spindles, i.e. the yarns are running through the spindle of the unwound bobbins
    • D01H1/106—Two-for-one twisting
    • D01H1/108—Two-for-one twisting for two or more supply bobbins one on top of the other
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • D01H15/007—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing for two-for-one twisting machines

Definitions

  • This invention relates to a method for pneumatic threading in a two-for-one twister using a spindle of the double hollow mandrel type.
  • the invention relates particularly to a two-for-one twisting spindle in which the two yarn bobbins are each mounted on their own hollow mandrel with the yarns unwind upwards, each yarn unwinding from its own bobbin to directly enter its own hollow mandrel without being conveyed during its travel into the space surrounding the other bobbin, all as described and claimed in the European Patent Appln. Publication No. 0 417 850 of the present Applicant.
  • the yarn braking device which has long been known (two expansion half-capsules) is located in that portion of the central duct comprising the stationary part of the lower mandrel of the twisting spindle. Both yarns to be twisted together to form the twisted yarn pass through said lower hollow mandrel.
  • Said yarns can be of any composition or structure, and will be known in the ensuing description and claims simply as yarns or twisted yarns, the terms being used interchangeably and including all filaments or filament assemblies or fibres, both natural and artificial.
  • various types of spindles are known, and it is also known that threading the yarn through the central bore of the hollow mandrel is always a problem, as the operation is difficult and laborious.
  • the applicant has therefore evolved and tried a reliable method for pneumatic threading for a two-for-one twisting spindle comprising a double central hollow mandrel in which a pressure fluid is fed at the required time from a position above the vertical stationary part via a duct arriving at a head positioned at will close to the twisting spindle.
  • the present invention provides a method for pneumatic threading in a two-for-one twister with a spindle of double hollow mandrel type in which the two yarn feed bobbins are located coaxially one above the other in the spindle basket, each bobbin being mounted on its own hollow mandrel with the yarn unwinding upwards and each yarn directly entering the hollow mandrel of its own bobbin without being conveyed during its travel into the space surrounding the other bobbin, said method comprising the following operating stages:
  • 1 is the initial yarn portion unwound from the underlying bobbin 4, which has already been positioned about the lower hollow mandrel 40 in the spindle basket 7.
  • the end of said initial yarn portion 1 is left free and lies outside the circular casing 6 of the twisting spindle 10;
  • 3 is the initial yarn portion unwound from the overlying feed bobbin 2;
  • 5 is the upper end of the hollow mandrel 40, ie the lower unwinding head, through the central bore 29 of which the yarns unwound from the feed bobbins 4 and 2 enter and slide to form the twisted yarn;
  • 8 is the yarn accumulator disc of known type on the spindle 10;
  • 12 is the duct through which the yarns 1 and 3 leave the disc 8;
  • 11 is the upper end of the hollow mandrel 14, known as the upper unwinding head, through the central bore 19 of which the yarn 3 slides during the twisting process;
  • 15 is the front frame of the twisting spindles 10, which are positioned one
  • Said pulley 44 is normally rotated by a belt as is well known in the art;
  • 30 is the expansion yarn braking device for controlling the yarn tension within the spindle.
  • the object shown in the figure is an expansion capsule, already known in the art, consisting of two cylindrical elements 32 and 34 positioned axially and held in their rest position pressing against the seats 31 and 33 by the elastic force of a helical spring 35 housed advantageously within its interior;
  • 36 is a sleeve enclosing the lower hollow mandrel 40, which sleeve 36 can slide and is fixed as one piece to a hollow pin 37 which defines in its cavity the lower support seat 33 for the cylindrical element 34 of the yarn braking device 30;
  • 38 is a helical spring housed in the cavity of the fixed bush 39, this latter supported by the fixed tubular element 41 of the spindle 10.
  • Said helical spring 38 exerts a continuous upward thrust on the lower surface of the hollow pin 37;
  • 42 is the end bush of the upper hollow mandrel 14.
  • Said bush 42 is fixed as a single piece to the lower end of the hollow mandrel 14 and in moving axially downwards it makes contact with the top of the sleeve 36, causing it to move axially downwards;
  • 46 is the duct which conveys compressed air into the injection nozzle 26 when the duct 46 is moved upwards to connect it to the pressure region 45, compressed air always being present in this latter region;
  • 43 is the permanent magnet inserted into the wall 36 surrounding the lower hollow mandrel 40, said permanent magnet 43 moving axially downwards to lie in a position in front of the yarn braking device 30.
  • the spindle 10 is fed with frusto-conical feed bobbins 2 and 4 to provide yarns 1 and 3 which are to form the twisted yarn.
  • the bobbin 4 is inserted into the basket 7 so that it is housed about the lower hollow mandrel 40 of the spindle. Simultaneously, or beforehand, an initial portion of its yarn 1 of sufficient length is unwound and allowed to hang by a certain length outside the twisting spindle 10 (see Figure 1).
  • the feed bobbin 2 is then taken from any store and is firstly mounted about the hollow mandrel 14 to rest on the plate 19, after which having unwound its initial portion of wound yarn 3 it is mounted in the spindle basket 7 together with said hollow mandrel 14 and said plate 19 (see Figure 2).
  • the head 25 is then moved into contact with the mouth 11 of the central bore 19 by rotating into into the position 25a (see Figure 4).
  • the head is then pressed downwards.
  • the thrust surface 28, in contact with the end 11, urges the hollow mandrel 14 to move downwards together with the end bush 42.
  • This latter by moving downwards makes contact with the sleeve 36 and pushes it downwards together with the hollow pin 37, the internal cavity of which forms the lower support seat 33, which by moving downwards releases the device 30 which is then attracted sideways by the permanent magnet 43 now positioned in front of said device 30.
  • the permanent magnet 43 which is rigid with the sleeve 36 is also moved downwards.
  • the central bores 19 and 29 of the two hollow mandrels 14 and 40, which are superposed and coaxial, are free for the passage of the initial portion 3 unwound from the feed bobbin 2.
  • the same air stream conveys it to the upper edge of the basket 7 of the twister spindle 10 where it is gripped by the operator, who pulls out a certain length.
  • the bobbin 2 is then extracted from the basket 7 and rested outside the spindle 10 on the table 13.
  • the operator joins by means of a knot 17 the initial end of the yarn 1 to any point of the yarn 3 between leaving the lower edge of the upper hollow mandrel 14 and entering the lower hollow mandrel 40 via its upper edge 5.
  • the operator grips the end (see Figure 8) of the initial yarn portion 3 and pulls said end until the knot 17 of the two joined yarns 1 and 3 leaves the basket 7 and the circular casing 6.
  • the operator mounts the bobbin 2 in the spindle basket 7 in a position coaxial and vertical to the underlying bobbin 4 to then immediately convey the initial ends of the yarns 1 and 3 to the winding unit (not shown as it is of known type) to commence the the known two-for-one twisting operation.
EP92201569A 1991-06-06 1992-06-02 Verfahren zur pneumatischen Einfädelung in eine Doppeldraht-Hohlspindel einer Zwirnmaschine Withdrawn EP0519539A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI911562A IT1248002B (it) 1991-06-06 1991-06-06 Metodo per l'infilaggio pneumatico in un fuso a doppio perno cavo di un ritorcitoio
ITMI911562 1991-06-06

Publications (1)

Publication Number Publication Date
EP0519539A1 true EP0519539A1 (de) 1992-12-23

Family

ID=11360063

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92201569A Withdrawn EP0519539A1 (de) 1991-06-06 1992-06-02 Verfahren zur pneumatischen Einfädelung in eine Doppeldraht-Hohlspindel einer Zwirnmaschine

Country Status (3)

Country Link
EP (1) EP0519539A1 (de)
CN (1) CN1069533A (de)
IT (1) IT1248002B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4404555C1 (de) * 1994-02-12 1995-06-14 Palitex Project Co Gmbh Verfahren zum getrennten Einfädeln von zwei von zwei gleichachsig übereinander angeordneten Vorlagespulen abgezogenen Einzelfäden in die zweigeteilte Hohlachse einer Doppeldraht-Zwirnspindel und Doppeldraht-Zwirnspindel
EP0721022A2 (de) 1995-01-07 1996-07-10 Palitex Project-Company GmbH Verfahren zum Einfädeln von zwei gleichachsig übereinander in eine Doppeldraht-Zwirnspindel einsetzbaren Vorlagespulen durch die zweigeteilte Spindelhohlachse

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101824704B (zh) * 2009-03-30 2011-07-27 张家港市维达纺织机械有限公司 钩编机的喂纱装置
EP3556918A1 (de) * 2018-04-20 2019-10-23 Lakshmi Machine Works Ltd. Garnhebevorrichtung für eine anspinnvorrichtung und verfahren dafür
CN110485008B (zh) * 2019-07-03 2020-08-25 东莞市旭盛线业有限公司 一种张力自调节多股捻线机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2544456B1 (de) * 1975-10-04 1977-03-03 Saurer Allma Gmbh Einfaedelvorrichtung fuer doppeldrahtzwirnmaschinen
FR2367692A1 (fr) * 1976-10-16 1978-05-12 Palitex Project Co Gmbh Dispositif destine a recevoir et a delivrer a nouveau sans tension une longueur de fil predetetminee
EP0051547A1 (de) * 1980-11-03 1982-05-12 Verdol S.A. Druckluftbetätigte Einfädelvorrichtung für eine Doppeldrahtzwirnspindel
EP0383960A1 (de) * 1989-02-18 1990-08-29 Palitex Project-Company GmbH Doppeldraht-Zwirnmaschine
EP0417850A2 (de) * 1989-09-15 1991-03-20 SAVIO MACCHINE TESSILI S.p.A. Doppeldrahtzwirnmaschinen mit einer Spindel aus zwei Hohlwellen und mit einer beweglichen Wellenkupplung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2544456B1 (de) * 1975-10-04 1977-03-03 Saurer Allma Gmbh Einfaedelvorrichtung fuer doppeldrahtzwirnmaschinen
FR2367692A1 (fr) * 1976-10-16 1978-05-12 Palitex Project Co Gmbh Dispositif destine a recevoir et a delivrer a nouveau sans tension une longueur de fil predetetminee
EP0051547A1 (de) * 1980-11-03 1982-05-12 Verdol S.A. Druckluftbetätigte Einfädelvorrichtung für eine Doppeldrahtzwirnspindel
EP0383960A1 (de) * 1989-02-18 1990-08-29 Palitex Project-Company GmbH Doppeldraht-Zwirnmaschine
EP0417850A2 (de) * 1989-09-15 1991-03-20 SAVIO MACCHINE TESSILI S.p.A. Doppeldrahtzwirnmaschinen mit einer Spindel aus zwei Hohlwellen und mit einer beweglichen Wellenkupplung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4404555C1 (de) * 1994-02-12 1995-06-14 Palitex Project Co Gmbh Verfahren zum getrennten Einfädeln von zwei von zwei gleichachsig übereinander angeordneten Vorlagespulen abgezogenen Einzelfäden in die zweigeteilte Hohlachse einer Doppeldraht-Zwirnspindel und Doppeldraht-Zwirnspindel
EP0721022A2 (de) 1995-01-07 1996-07-10 Palitex Project-Company GmbH Verfahren zum Einfädeln von zwei gleichachsig übereinander in eine Doppeldraht-Zwirnspindel einsetzbaren Vorlagespulen durch die zweigeteilte Spindelhohlachse
US5802834A (en) * 1995-01-07 1998-09-08 Palitex Project - Company Gmbh Method for threading yarns of two supply bobbins positioned coaxially atop one another in a two-for-one twisting spindle through the two-part hollow spindle axle

Also Published As

Publication number Publication date
ITMI911562A1 (it) 1992-12-06
ITMI911562A0 (it) 1991-06-06
CN1069533A (zh) 1993-03-03
IT1248002B (it) 1995-01-05

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