EP1350871A2 - Dispositif d'étirage dans une machine de filature comprenant des moyens de support pour des courroies supportant des fibres - Google Patents

Dispositif d'étirage dans une machine de filature comprenant des moyens de support pour des courroies supportant des fibres Download PDF

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Publication number
EP1350871A2
EP1350871A2 EP03005282A EP03005282A EP1350871A2 EP 1350871 A2 EP1350871 A2 EP 1350871A2 EP 03005282 A EP03005282 A EP 03005282A EP 03005282 A EP03005282 A EP 03005282A EP 1350871 A2 EP1350871 A2 EP 1350871A2
Authority
EP
European Patent Office
Prior art keywords
apron
shaft
guide means
strap
drafting system
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Withdrawn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
EP03005282A
Other languages
German (de)
English (en)
Other versions
EP1350871A3 (fr
Inventor
Werner Strasser
Harald Schwippl
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 Ingolstadt GmbH
Original Assignee
Rieter Ingolstadt Spinnereimaschinenbau 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 Rieter Ingolstadt Spinnereimaschinenbau AG filed Critical Rieter Ingolstadt Spinnereimaschinenbau AG
Publication of EP1350871A2 publication Critical patent/EP1350871A2/fr
Publication of EP1350871A3 publication Critical patent/EP1350871A3/fr
Withdrawn legal-status Critical Current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
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/86—Aprons; Apron supports; Apron tensioning arrangements

Definitions

  • the invention relates to a drafting system for a spinning machine according to the Preamble of claim 1 and an apron for a drafting system a spinning machine according to the preamble of claim 19.
  • the roving that is presented is usually used in a drafting system of textile machines by several pairs of cylinders arranged one behind the other and by at least led a pair of straps.
  • the successive pairs of cylinders stretch the slivers fed to them as a result of increasing Speeds of the following pairs of cylinders.
  • the fibers experience a clamping between the upper and lower rollers and accordingly also between the upper straps and lower straps.
  • With modern Ring spinning machines for processing short staple fibers mostly 3-cylinder double apron drafting systems used. These exist from driven steel cylinders, usually equipped with corrugation, that form the bottom rollers of a drafting system.
  • the top rollers usually work on pressure arms with the bottom rollers together, which are pressed against the lower rollers.
  • the drawn fibers form a fiber structure, which consists of only a few fibers due to the stretching.
  • the fiber guiding devices consisting of top straps and bottom straps
  • the fiber guiding devices are required to be satisfactory To achieve warping of the sliver. It is for guiding the fibers both known single straps and double straps, with top straps and bottom straps to use.
  • Modern ring spinning machines for example are usually equipped with double straps.
  • a drafting system with double straps there are one strap on each Lower roller and arranged on the upper roller.
  • the top strap will be there pressed against the bottom strap.
  • the setting of the straps, for example on the fiber volume takes place through the use of so-called Spacer shoes or cookies.
  • the top aprons of a double apron drafting system are usually short, while the lower straps are both designed as a long bottom strap as well as a short bottom strap can be.
  • DE 41 22 881 C2 describes that the upper strap around the middle Top roller is looped and is guided in an upper apron cage.
  • the bottom strap is looped around the strap bottom roller and over a belt table into the wedge gap of the exit rollers.
  • a strapping table is also shown, which is located above two neighboring ones Spinning stations extends and as a guide for the straps of the two neighboring Bottom rolls serves.
  • the known straps are depending on the arrangement and design of driven by a roller, around which they, at least in part, looped are.
  • guide elements guide means
  • the function of the Strappy is essentially a guide surface for the fibers in the Form transition to another pair of drafting rollers or when in use as compression straps, for example in the area of the exit rollers, to compress the fibers, as is the case, for example, in DE 198 40 960 A1 is described.
  • the known drafting systems have the disadvantage that the straps to a to allow good guidance of the fibers, have a rough surface and also when interacting with the material of the drafting cylinder or guide means there is a high sliding friction number. Thereby lies high friction between the guide means and straps, which results has that a lot of energy is used to drive the strappy got to. This also leads to increased wear, so that the straps need to be replaced early. Beyond sliding the straps are not evenly on their guide means, so that the So-called stick-slip effect can occur, which means the quality of the spun Fadens, especially its uniformity, negatively affected becomes.
  • the object of the present invention is therefore the disadvantages of the prior art to avoid the technology and to propose a drafting system, in which in particular the lifespan of the strappy is increased and above all that Straps through a smooth run no negative impact on the Quality of thread.
  • the present object is achieved according to the invention solved by a drafting system according to the features of claim 1 as well as an apron for a drafting system according to a spinning machine the features of claim 19.
  • the guide means slidably guides the straps and a low-friction Material pairing between straps and guide means for When used, less energy is used to guide the strappy must be applied, which is particularly important around the straps to be able to drive from the shaft without the strap under to put a high strapping tension. It also will advantageously achieved that the straps evenly over the guide means can slide, causing a smooth run of the straps and thus a uniform guidance of the fibers is made possible, so that the guidance the fibers through the straps no negative influence on the formation of thread.
  • the materials of the apron and the guide means are particularly advantageous matched so that the sliding friction coefficient ⁇ between Straps and guide means have a value of less than 0.3. This allows the straps to run evenly over the guide means be realized.
  • the sliding friction coefficient ⁇ is particularly advantageous between straps and guide means a value of less than 0.2. Thereby the run of the straps on the guide means is further improved and also the friction between the straps and the guide means, so less energy is used to drive the strappy must become.
  • a combination between is particularly advantageous Strappy and guide means that have a sliding friction number of less results in 0.1. This is particularly useful when there is a sharp deflection of the straps on the guide means, which in particular direct delivery of the apron to a pair of drafting cylinders the case is having a sufficient effect.
  • a drafting system in which the guide means for is particularly advantageous Reduction of friction between guide means and straps coated is. It is advantageously achieved that the straps as such still has sufficient roughness or when working with the shaft gives a sufficient sliding friction number, so that the drive of the Strappy through the shaft can be done reliably. At the same time, the Advantage is achieved that the coefficient of sliding friction between straps and guide means is low according to the invention.
  • This is advantageous as a coating of the guide agent polytetrafluoroethylene (PTFE) used because thereby a wear-resistant and safely reducing the sliding friction coefficient Coating can be carried out. This is particularly advantageous PTFE coating embedded in a nickel matrix with which the guide means is coated.
  • PTFE polytetrafluoroethylene
  • the guide means with the straps advantageously has a sliding friction number which is much smaller than that between the ones driving the strappy Wave and strappy. It is advantageously achieved that the Strappy can be reliably driven by the shaft while at the same time the advantages of low friction between the straps and Leadership can be achieved. In an advantageous development is used to drive the Strappy used a drafting cylinder.
  • the strappy consists of several layers, at least one outer layer and one inner layer, whereby advantageous the straps on its outer circumference, which with the fibers in Comes into contact, another surface can be realized while the inner side of the straps can be tailored to the requirements can with the guide means together with a low sliding friction to realize.
  • the outer layer of the strappy is advantageously essential rougher than the inner one, which cooperates with the management means Layer.
  • the guide means is particularly advantageous as a multi-part guide means trained, for example, on the different Share different coatings can be realized, so that in particular particularly in the area of sharp deflections of the straps wear-resistant coatings that reduce friction can be cheaper, for example, while in other areas Coatings can be used.
  • the invention is the geometry of the fiber guide on the drafting system adjustable, for example by changing the guide means for the Draft apron or the distances between the drafting cylinders.
  • the shaft with a friction Increasing coating coated which reduces the sliding friction between straps and shaft is favorably increased, so that the drive of the Strappy is guaranteed by the shaft, while being a cheap Realized sliding friction between the apron and guide means can be.
  • the sliding friction coefficient can therefore advantageously differ effective coatings are taken care of that an otherwise selected according to other criteria straps used can be realized to realize the advantages of the present invention.
  • the shaft forms together with the straps a positive connection in the drive the straps, which can be driven safely, too if there is little friction between the shaft and the apron.
  • This form-fitting connection can be advantageous through cutouts on Straps are realized to intervene in the approaches of the shaft. You can do this the recesses advantageously also realized at the edge of the strappy be so that, for example, gear-like on the shaft in this area Elements that work with the straps can be pushed on and with their teeth or approaches in the recesses of the Reach in straps. But it is also conceivable that the recesses are within the apron, in which the approaches of the shaft engage. Advantageous the recesses can also be the ones that have straps owns to compress the yarn.
  • the apron has approaches, which engage in the recesses of the shaft for a secure positive To achieve the connection between the apron and the shaft.
  • Another one advantageous development of the invention is to prevent the Slip between straps and shaft the straps using a pressure roller pressed against the shaft, and it is advantageously achieved that the frictional connection between the apron and the shaft can be increased significantly can, so that even with a very low sliding friction coefficient still sufficient Forces between shaft and strappy can be transferred to the Driving straps and sliding over the guide means.
  • Advantageous is the pressure roller loaded with a load, so that the pressing force can be adjusted.
  • the strappy consists of at least two layers, the outer layer being rougher than its inner one Position, for example through different materials of the strappy. at another advantageous embodiment of the strappy according to the invention this has a roughness on its surface that can be caused by machining the surface of the strappy has been changed or roughened.
  • the strap advantageously has openings which form the means to compress the fibers.
  • the Strappy has openings for the drive of the strappy through the shaft, lugs on the shaft into the perforations of the Interfere with straps. These openings can be advantageous be the same or partially the same as the means for compacting the fibers form.
  • the strappy recesses into which the shaft engages with lugs to drive the strappy In another favorable embodiment of the invention the strappy recesses into which the shaft engages with lugs to drive the strappy. In another favorable embodiment of the Strappy has this approach, with the help of straps in recesses the shaft or other drive means engages the force transmitted from the shaft or other drive means.
  • FIG. 1 shows a drafting system 1 designed according to the invention for a Ring spinning machine on average.
  • the drafting system 1 is a 3-cylinder double apron drafting system.
  • the drafting system 1 thus consists of three sub-cylinders 11, which are driven and on which three top rollers 12 are placed are.
  • the main default field 14 connects to the default field 13 in which two straps 2 for guiding the fibers for guiding the fibers are arranged.
  • the middle cylinder 3 and its associated top roller 31 are each wrapped by their straps 21, 22, which in Direction towards the output roller pair 32 with the aid of guide means 4 are led.
  • the straps 2 slide over the guide means 4 of which they from the center cylinder 3 and top roller 31 to the wedge gap of the pair of output rollers 32 be led there.
  • the top roller strap 31 lies on the apron 2 of the central cylinder 3.
  • the bottom strap 21 is designed as a so-called long bottom strap 21, so that it is a further guide means 41, which continues from the central cylinder 3 removed, must be led around.
  • the other guide means 41 is mounted elastically and keeps the bottom strap 21 under tension.
  • Both the guide means 4 of lower straps 21 and upper straps 22 and the further guide means 41 are designed according to the invention such that they have a low-friction material pairing with the strappy form.
  • the guide means 4 as well as the further guide means 41 with a coating Mistake.
  • the coating is over the entire surface of guide means 4 and other guide means 41 applied be in contact with the straps 2. This ensures that the Run the straps 2 over the guide means 4, 41 with a very low Friction occurs, so that a smooth movement of the straps 2 over the guide means 4, 41 is guaranteed.
  • the fibers, which are passed between the straps 2, a uniform Subject to transportation at a constant speed, so that afterwards to the output roller pair 32 by rotation uniform thread can be formed.
  • the two straps 2, both the upper straps wrapping around the upper roller 31 22 and the lower strap wrapping around the central cylinder 3 21 are driven by a shaft, directly or indirectly, in that the center cylinder 3 is driven by the drive of the ring spinning machine. It is therefore important that between the central cylinder 3 and the lower apron 21 there is sufficient frictional engagement so that the drive power of the central cylinder 3 can also be transferred to the lower apron 21 can. This then transmits the movement to the top strap 22 of the lower apron 21, since the upper apron 22 from the upper roller 31, the itself is not driven, so pressed onto the lower strap 21 becomes. This means that the power transmission between the center cylinder and the lower strap 21 must be so large that the entire system can be driven safely and evenly.
  • the shaft for driving of the straps of the central cylinder 3 provided with a coating that ensures that the sliding friction between the central cylinder 3 and the the middle cylinder 3 communicating inside of the lower apron 21 is so high that reliable drive can take place. If this cannot be done reliably, the present invention sees as additional or alternative measure before using a pressure roller 42 Lower strap 21 on the shaft driving the lower strap, here the Center cylinder 3 to press.
  • the coating of the guide means 4 and the further guide means 41 consists of PTFE (polytetrafluoroethylene), the PTFE in a nickel matrix, which is applied to the guide means 4, is stored.
  • the load carrier 8 the For example, can be made of sheet steel, and the top rollers 12 carries and presses them onto the lower cylinder 11. This becomes the burden bearer 8 loaded by an elastic element or by means of compressed air.
  • the drafting system shown in Figure 2 as a schematic diagram with an after Output roller pair 32 downstream fiber compression zone in the fiber transport direction 7, has a perforated strap 23, which in known Is sucked up to summarize the fibers passed over it and condense with it.
  • the perforated strap 23 is over a roller 73 out, and by means of guide means 4 to the area of the pair of output rollers 32 led.
  • the guide means 4 are vacuumed to the Compress fibers in connection with the perforated strap 23.
  • the perforated straps 23 is over a drive roller 5 (shaft) driven on the outside, as is known, for example, from DE 197 98 410 A1 is known.
  • a delivery roller 72 lies on the perforated strap 23 on, which presses the perforated strap 23 against the roller 73.
  • the drive of the perforated strappy is done via a wave that is not in engages the inside of the strap, but on the outside.
  • the Guide means 4 are according to the present invention, as in Figure 1 described, designed.
  • the present invention thus relates to both guide means and straps, which are arranged as upper or lower aprons in the main drafting zone of the drafting system are, as well as straps, such as perforated straps 23 as a means of compacting the fibers in a fiber compression zone 7 are arranged. Even with a drafting system 1 with a fiber compression zone exist as described above using the example of a drafting system apron Problems solved equally by the present invention become.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP03005282A 2002-03-28 2003-03-11 Dispositif d'étirage dans une machine de filature comprenant des moyens de support pour des courroies supportant des fibres Withdrawn EP1350871A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002114339 DE10214339A1 (de) 2002-03-28 2002-03-28 Streckwerk für eine Spinnereimaschine
DE10214339 2002-03-28

Publications (2)

Publication Number Publication Date
EP1350871A2 true EP1350871A2 (fr) 2003-10-08
EP1350871A3 EP1350871A3 (fr) 2005-04-13

Family

ID=27816073

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03005282A Withdrawn EP1350871A3 (fr) 2002-03-28 2003-03-11 Dispositif d'étirage dans une machine de filature comprenant des moyens de support pour des courroies supportant des fibres

Country Status (6)

Country Link
EP (1) EP1350871A3 (fr)
JP (1) JP2003293229A (fr)
CN (1) CN1448557A (fr)
BR (1) BR0300777A (fr)
DE (1) DE10214339A1 (fr)
TW (1) TW200305665A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1801270A1 (fr) * 2005-12-19 2007-06-27 Rovira Trias, Juan Dispositif pour guider de corroie inferiere dans des bancs d'etirage
DE102006030155B3 (de) * 2006-06-28 2007-06-28 Saurer Gmbh & Co. Kg Verzugsriemen für Faserstreckwerke
ES2303429A1 (es) * 2005-02-22 2008-08-01 Maschinenfabrik Rieter Ag Banco de estiraje y dispositivo de guiado para el mismo.
WO2021136770A1 (fr) 2019-12-31 2021-07-08 Maschinenfabrik Rieter Ag Dispositif d'étirage d'une machine textile, la machine textile et un élément coulissant mobile de la machine textile, et un procédé de réduction de frottement entre un tablier d'étirage d'un brin de fibre et au moins un élément fixe du dispositif d'étirage du brin de fibre sur la machine textile

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006051875A1 (de) * 2006-10-31 2008-05-08 Maschinenfabrik Rieter Ag Kepa-Streckwerk für eine Spinnmaschine
DE102007014157A1 (de) 2007-03-21 2008-09-25 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Streckwerk mit wenigstens einem Riemchen zur Verfeinerung von Fasermaterial
DE102012013574A1 (de) * 2012-07-06 2014-05-22 Saurer Germany Gmbh & Co. Kg Streckwerk für eine Spinnmaschine
CN104213275B (zh) * 2014-09-04 2017-01-11 天津工业大学 一种用于教学演示的小型细纱机电子牵伸装置
CN104928816A (zh) * 2015-05-26 2015-09-23 武汉纺织大学 一种支撑轴主动转动的重聚集纺纱方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH345570A (de) * 1955-09-02 1960-03-31 Rieter Joh Jacob & Cie Ag Riemchenstreckwerk in einer Textilmaschine
GB1184787A (en) * 1960-11-20 1970-03-18 Mackie & Sons Ltd J Improvements relating to Textile Drafting Apparatus
EP0407715A1 (fr) * 1989-07-08 1991-01-16 Horst Bockemühl-Wüllenweber Manchons de transport pour des fils
DE4122883A1 (de) * 1991-07-11 1993-01-14 Schurr Stahlecker & Grill Spinnmaschine mit einer vielzahl von in maschinenlaengsrichtung mit abstand zueinander angeordneten streckwerken
US20010009052A1 (en) * 2000-01-21 2001-07-26 Fritz Stahlecker And Hans Stahlecker Transport belt for transporting a fiber strand to be condensed and method of making same
DE10012019A1 (de) * 2000-03-11 2001-09-13 Rieter Ag Maschf Streckwerk für Spinnmaschine
US6327746B1 (en) * 1998-08-17 2001-12-11 Spindelfabrik Suessen, Schurr, Stahlecker & Grill Gmbh Endless transport belt for transporting a drafted fiber strand and method of making same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4201220A1 (de) * 1992-01-18 1993-07-22 Zinser Textilmaschinen Gmbh Streckwerk fuer spinnereimaschinen mit riemchen
DE19652062A1 (de) * 1996-12-13 1998-06-18 Zinser Textilmaschinen Gmbh Spinnereimaschinen-Streckwerk
DE10002253B4 (de) * 2000-01-20 2005-12-15 Emil Bröll GmbH & Co. Verwendung einer Beschichtung für Oberflächen von Textilmaschinenkomponenten

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH345570A (de) * 1955-09-02 1960-03-31 Rieter Joh Jacob & Cie Ag Riemchenstreckwerk in einer Textilmaschine
GB1184787A (en) * 1960-11-20 1970-03-18 Mackie & Sons Ltd J Improvements relating to Textile Drafting Apparatus
EP0407715A1 (fr) * 1989-07-08 1991-01-16 Horst Bockemühl-Wüllenweber Manchons de transport pour des fils
DE4122883A1 (de) * 1991-07-11 1993-01-14 Schurr Stahlecker & Grill Spinnmaschine mit einer vielzahl von in maschinenlaengsrichtung mit abstand zueinander angeordneten streckwerken
US6327746B1 (en) * 1998-08-17 2001-12-11 Spindelfabrik Suessen, Schurr, Stahlecker & Grill Gmbh Endless transport belt for transporting a drafted fiber strand and method of making same
US20010009052A1 (en) * 2000-01-21 2001-07-26 Fritz Stahlecker And Hans Stahlecker Transport belt for transporting a fiber strand to be condensed and method of making same
DE10012019A1 (de) * 2000-03-11 2001-09-13 Rieter Ag Maschf Streckwerk für Spinnmaschine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2303429A1 (es) * 2005-02-22 2008-08-01 Maschinenfabrik Rieter Ag Banco de estiraje y dispositivo de guiado para el mismo.
EP1801270A1 (fr) * 2005-12-19 2007-06-27 Rovira Trias, Juan Dispositif pour guider de corroie inferiere dans des bancs d'etirage
DE102006030155B3 (de) * 2006-06-28 2007-06-28 Saurer Gmbh & Co. Kg Verzugsriemen für Faserstreckwerke
WO2021136770A1 (fr) 2019-12-31 2021-07-08 Maschinenfabrik Rieter Ag Dispositif d'étirage d'une machine textile, la machine textile et un élément coulissant mobile de la machine textile, et un procédé de réduction de frottement entre un tablier d'étirage d'un brin de fibre et au moins un élément fixe du dispositif d'étirage du brin de fibre sur la machine textile

Also Published As

Publication number Publication date
JP2003293229A (ja) 2003-10-15
BR0300777A (pt) 2004-08-17
CN1448557A (zh) 2003-10-15
DE10214339A1 (de) 2003-10-16
EP1350871A3 (fr) 2005-04-13
TW200305665A (en) 2003-11-01

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