EP0107828A2 - Train d'étirage - Google Patents

Train d'étirage Download PDF

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Publication number
EP0107828A2
EP0107828A2 EP83110102A EP83110102A EP0107828A2 EP 0107828 A2 EP0107828 A2 EP 0107828A2 EP 83110102 A EP83110102 A EP 83110102A EP 83110102 A EP83110102 A EP 83110102A EP 0107828 A2 EP0107828 A2 EP 0107828A2
Authority
EP
European Patent Office
Prior art keywords
rollers
straps
pair
output
roller
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.)
Granted
Application number
EP83110102A
Other languages
German (de)
English (en)
Other versions
EP0107828A3 (en
EP0107828B1 (fr
Inventor
Herbert Stalder
Emil Briner
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.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
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 Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0107828A2 publication Critical patent/EP0107828A2/fr
Publication of EP0107828A3 publication Critical patent/EP0107828A3/de
Application granted granted Critical
Publication of EP0107828B1 publication Critical patent/EP0107828B1/fr
Expired 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
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/26—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by one or more endless aprons

Definitions

  • the invention relates to a drafting system for spinning machines, in particular for jet spinning machines, with at least one pair of output rollers and an upstream pair of rollers, viewed in the direction of thread travel, the rollers of which are each provided with an apron for guiding the fiber strand, the outlet mouth of the apron pair facing such the clamping lines of the pair of output rollers is arranged so that the fiber sliver undergoes at least one deflection in the area between the outlet mouth and said clamping line.
  • the circumference of the output rollers of the drafting system have an effect such that marginal fibers are released or removed from these fibers shortly before being detected by the clamping gap of the output roller pair can be spread, which either results in a loss of fibers or unevenness in the yarn.
  • the fibers are detached or spread apart in the converging space of the pair of exit rollers, ie in the area of the entry zone to the nip of the two exit rollers.
  • DOS No. 30 39 149 it is proposed in DOS No. 30 39 149 to offset the exit mouth of the apron drafting device in relation to the nip point of the exit rollers in a direction perpendicular to the “fiber strand travel path” (see claim 2 and FIG. 2 of the said publication).
  • the fiber run should avoid the cross flows mentioned, i.e. to a certain extent bypass them in order to reach the nip in the area close to the surface of the nearest roller.
  • the disadvantage of this system is that the fiber band is flowed through on one side by the circumferentially directed air flow of the nearest roller and thereby experiences a deflection from which fiber ends are spread into the cross-flow zone, whereby the disadvantage to be remedied is generated again in a different way.
  • the invention is therefore based on the object of largely avoiding the loss and / or spreading of fibers by air currents. )
  • the object is achieved in that one of the two straps protrudes into the converging space of the pair of exit rollers, that the sliver is deflected around that of the two straps that protrudes into the converging space of the pair of exit rollers, and that both straps are guided so close to the exit rollers that the straps do not touch the rollers and that the air gap between the straps and rollers is as small as possible.
  • the invention is therefore based on the finding that the respective run of the two straps can be used as a type of shielding in order to prevent the occurrence of cross currents from the outset.
  • Either the lower or the upper strap can protrude further into the converging space.
  • the advantages of the invention are that on the one hand the unguided sliver length is shorter than in drafting systems in which neither of the straps protrudes into the converging space, and on the other hand the ambient air flow of the rotating rollers is practically kept away from the converging space, so that the nonuniform fiber spreading and detachment of the edge fibers essentially prevented and thereby the Uniformity of the yarn is improved.
  • the upper exit roller can be arranged offset against the upper apron.
  • the advantage of this embodiment is that the reduction in the diameter of the upper output roller, which is customary after a certain operating time, can be carried out practically without enlarging the air gap mentioned.
  • a two-zone drafting system 1 of a spinning machine e.g. a nozzle spinning machine, comprises an input roller pair 2 with an upper input roller 2.1 and a lower input roller 2.2, an intermediate roller pair 3 with an upper intermediate roller 3.1 and a lower intermediate roller 3.2 and an output roller pair 4, with an upper output roller 4.1 and a lower output roller 4.2.
  • the stretching zone between the input and the intermediate roller pair is called the pre-stretching zone and that between the intermediate and the output roller pair is the main stretching zone.
  • a fiber sliver 5 which is moved in the direction of the arrow and is to be drawn is passed through a pair of straps 6, consisting of an upper strap 7 and a lower strap 8.
  • the upper apron 7 is driven by the upper intermediate roller 3.1 and deflected by a web 9 at the output end, while the lower apron 8 is driven by the lower intermediate roller 3.2 and deflected by a plate 10 at the output end.
  • the two deflection points of the straps 7 and 8 given by the web 9 or plate 10 form the exit mouth of the pair of straps.
  • the lower rollers 2.2, 3.2 and 4.2, and the plate 10 are stationary on a support 11 (indicated by dash-dotted lines) and the upper rollers 2.1, 3.1 and 4.1, and the web 9 are pivotable about a pivot point (not shown) Bracket 12 (indicated by dash-dotted lines) of the aforementioned elements 2.2, 3.2, 4.2 and 11 arranged removable.
  • the upper rollers 2.1, 3.1 and 4.1, and the web 9 are resiliently mounted in the bracket 12 in a manner known per se, so that the upper rollers 2.1, 3.1 and 4.1 as well as the strap 7 are pretensioned to the lower rollers or the lower one Strappy to be pressed.
  • the lower apron 8 projects at its given through the plate 10 deflection in such a way wider than the strap 7 in the converging space 13 (Fig. 2) of the A usgangswalzenpases that on one hand the fiber sliver 5 is deflected at the deflection of the lower small belt 8, and that on the other hand the distance ( M ) between the lower apron 8 and the lower exit roller 4.2 is as small as possible, but is such that no contact between the apron and roller can occur.
  • the unguided length of the fiber sliver 5 is kept as short as possible and, on the other hand, the ambient air penetrating into the converging space of the lower output roller 4.2 rotating in the direction of the arrow is reduced to a minimum, ie practically prevented.
  • the upper apron is in turn also provided so close to the upper output roller 4.1 that the distance N essentially corresponds to the distance M in order to fulfill the same function as the distance M.
  • the upper rollers 2.1, 3.1 and 4.1 are generally made of hard rubber and wear down during operation in such a way that they are reduced to a smaller diameter at least once during their service life, in order to make them as good as new To get surface.
  • This reduction to a roller diameter according to roller 4.1.1 results in an enlargement of the air gap N in accordance with the embodiment according to FIG. 3, so that undesirably more peripheral air can flow into said converging space 13
  • This enlargement of the air gap in the variant according to FIG. 3 takes place somewhat less than in the arrangement according to FIGS. 1 and 2, since in the arrangement according to FIG. 3 the upper strap 7 protrudes further into the converging space mentioned and the diameter difference is less affects.
  • the upper output roller 4.1 is offset against the apron 7.
  • the line of contact of the upper and lower exit roller after the diameter reduction has been carried out is offset further by an arc dimension B to be removed from the circumference of the lower exit roller 4.2, ie, compared to the position without diameter reduction, further offset against the straps.
  • This dislocation becomes an essential part of the air gap expansion compensated, that is, the air gap N 'corresponds essentially to the air gap N.
  • the optimal radian by which the upper output roller 4.1 is to be offset against the straps depends on the type of straps and their arrangement.
  • the radian C corresponds essentially to one third of the diameter of the upper exit roller 4.1.
  • the radian measure C is based on an imaginary plane E which passes through the axis of rotation of the lower output roller 4.2 and which is perpendicular to an imaginary plane F in which the axes of rotation of the lower output roller 4.2 and lower intermediate roller 3.2 lie.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP83110102A 1982-10-11 1983-10-10 Train d'étirage Expired EP0107828B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5945/82 1982-10-11
CH594582 1982-10-11

Publications (3)

Publication Number Publication Date
EP0107828A2 true EP0107828A2 (fr) 1984-05-09
EP0107828A3 EP0107828A3 (en) 1984-06-06
EP0107828B1 EP0107828B1 (fr) 1986-03-26

Family

ID=4301928

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83110102A Expired EP0107828B1 (fr) 1982-10-11 1983-10-10 Train d'étirage

Country Status (4)

Country Link
US (1) US4520532A (fr)
EP (1) EP0107828B1 (fr)
JP (1) JPS5971419A (fr)
DE (1) DE3362705D1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3615407A1 (de) * 1985-05-07 1986-11-13 N P K "Tekstilno Mašinostroene", Gabrovo Streckwerk zur verstreckung eines faserbandes
EP0350797A1 (fr) 1988-07-15 1990-01-17 Maschinenfabrik Rieter Ag Train d'étirage pour des métiers à filer
US4967547A (en) * 1988-07-23 1990-11-06 Fritz And Hans Stahlecker Drafting unit for a spinning machine
DE4139067A1 (de) * 1991-11-28 1993-06-09 Skf Textilmasch Komponenten Doppelriemchenstreckwerk fuer spinnereimaschinen
EP0798408A1 (fr) * 1996-03-25 1997-10-01 Howa Machinery Limited Système d'étirage pour un métier à filer pour fil de titre fin
CN1056205C (zh) * 1996-03-25 2000-09-06 丰和工业株式会社 三列式牵伸装置
EP1464740A2 (fr) * 2003-04-02 2004-10-06 Maschinenfabrik Rieter Ag Banc à étirer à courroies doublées pour des métiers à filer

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH033581Y2 (fr) * 1986-01-16 1991-01-30
US4901517A (en) * 1989-07-17 1990-02-20 Monsanto Company Apparatus for the drafting section of ring spinning frames
US5479680A (en) * 1990-04-06 1996-01-02 Stalder; Herbert Sliver drafting apparatus
DE10317430B4 (de) * 2003-04-15 2011-05-12 Rieter Ingolstadt Gmbh Textilmaschine mit einem Streckwerk

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001241A (en) * 1957-05-21 1961-09-26 Aymerich Juan Comerma Drafting train on continuous spinning machines
US3125784A (en) * 1964-03-24 Macdonald
US3126585A (en) * 1964-03-31 Apron control means for drawing apparatus

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE718112C (de) * 1939-01-25 1942-03-03 Spinnfaser Ag Doppelriemchenstreckwerk
US2994086A (en) * 1948-10-01 1961-07-25 Zellwolle Lehrspinnerei Gmbh High-draft drawing mechanism for spinning machines
DE976037C (de) * 1949-07-19 1963-01-24 Denkendorf Forschungsgesellsch Doppelriemchen-Streckwerk
NL84888C (fr) * 1953-01-19
BE538834A (fr) * 1954-06-30 1959-07-03
GB1378177A (en) * 1971-06-18 1974-12-27 Mackie & Sons Ltd J Textile drafting machines
US4387487A (en) * 1979-10-16 1983-06-14 Murata Kikai Kabushiki Kaisha High draft apparatus in spinning machine
JPS5668118A (en) * 1979-11-08 1981-06-08 Murata Mach Ltd Drafting apparatus in spinning machine
JPS5940928B2 (ja) * 1980-04-30 1984-10-03 村田機械株式会社 紡績機に於けるドラフト装置の駆動伝達方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125784A (en) * 1964-03-24 Macdonald
US3126585A (en) * 1964-03-31 Apron control means for drawing apparatus
US3001241A (en) * 1957-05-21 1961-09-26 Aymerich Juan Comerma Drafting train on continuous spinning machines

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3615407A1 (de) * 1985-05-07 1986-11-13 N P K "Tekstilno Mašinostroene", Gabrovo Streckwerk zur verstreckung eines faserbandes
FR2581664A1 (fr) * 1985-05-07 1986-11-14 Npk Textilno Mash Appareil d'etirage
EP0350797A1 (fr) 1988-07-15 1990-01-17 Maschinenfabrik Rieter Ag Train d'étirage pour des métiers à filer
US5048157A (en) * 1988-07-15 1991-09-17 Rieter Machine Works, Ltd. Drafting arrangement for spinning machines
US4967547A (en) * 1988-07-23 1990-11-06 Fritz And Hans Stahlecker Drafting unit for a spinning machine
DE4139067A1 (de) * 1991-11-28 1993-06-09 Skf Textilmasch Komponenten Doppelriemchenstreckwerk fuer spinnereimaschinen
EP0798408A1 (fr) * 1996-03-25 1997-10-01 Howa Machinery Limited Système d'étirage pour un métier à filer pour fil de titre fin
CN1056205C (zh) * 1996-03-25 2000-09-06 丰和工业株式会社 三列式牵伸装置
EP1464740A2 (fr) * 2003-04-02 2004-10-06 Maschinenfabrik Rieter Ag Banc à étirer à courroies doublées pour des métiers à filer
EP1464740A3 (fr) * 2003-04-02 2005-08-31 Maschinenfabrik Rieter Ag Banc à étirer à courroies doublées pour des métiers à filer
US6988355B2 (en) 2003-04-02 2006-01-24 Maschinenfabrik Rieter Ag Double-apron drafting unit for spinning machines

Also Published As

Publication number Publication date
EP0107828A3 (en) 1984-06-06
JPS5971419A (ja) 1984-04-23
EP0107828B1 (fr) 1986-03-26
US4520532A (en) 1985-06-04
DE3362705D1 (en) 1986-04-30

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