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WO2008071170A1 - Machine d'étirage pour l'affinement de matériaux fibreux et courroie appropriée - Google Patents

Machine d'étirage pour l'affinement de matériaux fibreux et courroie appropriée Download PDF

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Publication number
WO2008071170A1
WO2008071170A1 PCT/DE2007/002222 DE2007002222W WO2008071170A1 WO 2008071170 A1 WO2008071170 A1 WO 2008071170A1 DE 2007002222 W DE2007002222 W DE 2007002222W WO 2008071170 A1 WO2008071170 A1 WO 2008071170A1
Authority
WO
WIPO (PCT)
Prior art keywords
fiber material
straps
apron
drafting system
drafting
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.)
Ceased
Application number
PCT/DE2007/002222
Other languages
German (de)
English (en)
Inventor
Reinhard Dr. Ing. KÖNIG
Georg KÖNIG
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2008071170A1 publication Critical patent/WO2008071170A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • D01H5/26—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by one or more endless aprons
    • 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
    • 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
    • D01H5/88—Cradles; Tensors

Definitions

  • the invention relates to a drafting system according to the preamble of claim 1 and a suitable strap.
  • Draw frames of this type which are generally referred to as Riemchen drafting systems, include u. a. two pairs of drafting device organs, which are arranged one behind the other in the transport direction of a fiber material to be refined and form a main draft zone. While the drafting of the front in the transport direction pair usually consist of one roller, the rear in the transport direction of each pair of a roller, a first, with distance arranged in front of this roller, also referred to as turning rail deflecting and one to the roller and the Formed straps, wherein the lower apron (also known as Unterriemchen) od at least a second, for tensioning the strap certain deflecting element in the form of a tensioning bow. The like. Is assigned.
  • the roller of the Unterriemchens and thereby also the Unterriemchen itself is driven.
  • the other upper apron also called upper apron
  • the lower drafting member of the rear pair can be referred to as a driving, the associated upper drafting organ organ, however, as a driven drafting device organ.
  • the lower, driven by the lower roller Unterriemchen is pulled over the associated turning rail and therefore claimed to train, while the Oberriemchen pushed by the upper roller substantially only over the associated turning rail, d. H. is claimed to thrust.
  • the straps used for the described drafting systems usually consist of a middle layer of fabric and two of these adjacent outer layers of rubber. Alternatively, however, single-layer straps made of plastic, in particular polyurethane are known. The thickness of these straps is generally between 0.9 mm and 1.1 mm. However, aprons with thicknesses down to 0.5 mm have also become known (eg DE 10 2004 023 896 A1, DD 296 317 A5, FR 20 57 592 A5). Due to the construction described, a Riemchenstreckwerk has several undesirable properties.
  • the upper apron is deformed in the shape of a funnel or with the formation of a bulge and lifted in a balloon-like manner over an undefined distance from the lower apron.
  • the fiber quality is significantly impaired, especially in the main draft zone, especially as the deformation or bulging of the top apron is subject to fluctuations.
  • the thrust effect in particular in the region of the turning rail of the upper apron, has the disadvantageous consequence that the apron at the deflection point is subjected to a rolling process in addition to a friction process.
  • a warming occurs at least the upper apron, which in high-performance drafting systems
  • the conventionally provided by the used Riem- chenmaterial Umlenkradien the turning rails require a certain minimum distance between the exit slit of the two straps and the nip of the following in the transport direction pair of draw rolls, ie the exit slit of the 0 straps can not be so deep in the mattersszwickel this Stretching rollers are laid, as it would be desirable to equalize the delay.
  • a friction field is formed between the exit slit of the straps and the nip line of the following pair of rollers, causing the flooding fiber material to transversal vibrations stimulates, which is thereby subjected to uncontrolled fluctuations in its extent.
  • the technical problem to be solved by the invention is to design the drafting system of the generic type such that the bulging and swaging of the upper apron are reduced and the exit slit of the two aprons are arranged lower than previously in the gusset of the following pair of drafting system members can.
  • the invention is based on the surprising finding that a major reason for the previously existing difficulties in the thickness of the straps used, in particular the Oberriemchen and the relatively large radii of curvature of the associated deflection surfaces of the turning rails can be seen, especially when high Riemchen beauen are desired or required , Characterized in that according to the invention lies at the lower limit of conventional Riemchendicken or even significantly smaller Riemchendicken down to 0, 1 mm are proposed, turning rails can be provided which have deflection surfaces with much smaller radii of curvature.
  • Figure 1 shows schematically in a partially sectioned side view of a conventional drafting system for the refinement of fiber material.
  • Fig. 2 is a provided with a Oberriemchen drafting device of the drafting system of FIG. 1;
  • Fig. 3 is an enlarged schematic representation of the drafting system of Figure 1 in the transition region from the straps to a subsequent pair of draw rolls.
  • Fig. 4 increases the deflection of a strap in the region of a deflection element of the drafting system of FIG. 1;
  • FIG. 5 shows a cross section through a conventional straps for the drafting system of FIG. 1.
  • Fig. 6 is a cross section through a on the same scale as in Fig. 5 shown strapping according to the invention.
  • FIG. 7 shows a representation similar to FIG. 3 when a pair of straps according to the invention is used.
  • Fig. 1 shows a classic drafting system
  • the z. B. for processing short fibers and in a direction indicated by arrows 1 transport direction promotes only schematically illustrated fiber material 2.
  • the drafting system has three pairs I, II and III of drafting device bodies arranged one behind the other in the transport direction.
  • the first pair I includes two rollers 3a and 3b as drafting devices.
  • the second pair II contains as drafting devices per a roller 4a and 4b, depending in the transport direction in front of this roller 4a, 4b lying, also referred to as turning rail, consisting mostly of a stationary rod deflecting 5a and 5b and one each via the associated rollers 4a, 4b and deflecting elements 5a, 5b guided strap 6a and 6b.
  • the straps 6a, 6b serve the purpose of guiding the fiber material 2 after leaving the rollers 4a, 4b up to an outlet gap 7, which usually has an adjustable jaw width.
  • the strap 6a is also passed over a tensioning element 8 to hold it with a desired preload on the roller 4a and the deflecting element 5a.
  • the third pair III contains analogously to the first pair I two rollers 9a and 9b as drafting device.
  • the described rollers 3, 4 and 9 of the three pairs I, II and III of drafting device form between them usual nip lines.
  • the pairs I and II form a Vorverzugszone by the peripheral speeds of the rollers 3 and 4 z. B. are selected so that a distortion of the fiber material 2 between 5 and 15 times is obtained.
  • the fiber material 2 between the pairs II and III one Main distortion subjected to an extension of the fiber material 2 z. B. by 50 times or more and thereby leads to a desired final fineness at the exit of the roller 9.
  • the rollers 3a, 4a and 9a are forcibly driven in a conventional manner. Serve not shown, mounted on their shafts gears od. Like. And coupled with these drive motors. In contrast, the rollers 3b, 4b and 9b are taken only by friction of the rollers 3a, 4a and 9a by od as usual on a pressure arm, not shown. Like. Are rotatably mounted, which by means of a force, for. As a spring force, in the direction of the apparent from Fig. 1 arrows F against the rollers 3a, 4a and 9a is pressed.
  • the deflecting element 5b is also mounted on the same pressure arm so that it and thus a lower run 10a (FIGS. 2 and 3) of the strap 6b are pressed against an upper run IIa of the strap 6a.
  • the deflection element 5b may be a component of a conventional, schematically indicated Riemchen tannin- figs 12 (Fig. 1).
  • the driving rollers 3a, 4a and 9a are mostly called lower rollers and the driven by friction, driven rollers 3b and 4b and 9b referred to as top rollers. Accordingly, the strap 6a is a bottom strap and the strap 6b is a top strap.
  • the same terms are used in the following description, although in principle, the driving drafting organs above and the driven drafting device organs could be down.
  • FIG. 3 shows that the deflection of the straps 6a, 6b takes place at a comparatively large distance from the nip line of the rollers of the third pair III. In other words, the exit slit 7 of the pair of aprons reaches very little into a gusset 15 (see also Fig.
  • FIG. 4 indicates that the straps 6a, 6b in the region of the respective deflecting elements 5a, 5b are not only subject to friction but also to flexing, to which reference has been made above.
  • the described and other problems of known drafting systems are avoided in that at least the thickness of Oberriemchen 6b is chosen to be considerably smaller than usual, and the Oberriemchen 6b leading part of the deflector 5b is given a significantly smaller radius of curvature than before. is common.
  • an inventive strap 6 has at most a thickness d (Fig. 6), the z. B. is only about 0.5 to 0.6 times the thickness D (Fig. 5) of conventional straps. It does not matter if the strap 6 is single-layered and z. B. consists of polyurethane or has multiple layers and z. B. is made of two outer rubber layers 20a, 20b and an embedded between these fabric layer 20c.
  • the apron 6 according to the invention is given a thickness d of at most 0.7 mm and preferably more than 0.1 mm, although the lower limit depends mainly on what is technically feasible.
  • straps 6 with a thickness d of less than 0.1 mm can be used for the purposes of the invention.
  • straps 6 made of polyurethane with values d which satisfy the inequality 0.2 mm ⁇ d ⁇ 0.6 mm have proven to be the best.
  • Oberriemchen 6b with these thicknesses d is achieved that the radius of curvature of the actual deflection of Oberriemchens 6b causing deflecting surface 21b (Fig. 4) of the respective deflecting element 5b (Fig. 1) substantially smaller than previously selected and z. B. can be set to less than 2 mm. Curvature radii of 0.5 mm to 1.5 mm have proven best to date.
  • the lower apron 6a is also produced with a thickness corresponding to the thickness d of the upper apron 6b according to the invention, and, as particularly shown in FIG. 7, forming both deflecting elements 5a, 5b in the manner of knives or sharp edges, at least in the region of their deflecting surfaces 21a, 21b , d. H. to be provided with very small deflection radii.
  • the two deflection surfaces 21a, 21b can then be placed very deeply in the gusset 15 of the following pair of rollers 9a, 9b, in particular if, in addition, the jaw width is selected to be small.
  • Fig. 8 shows that the Unterriemchen 6a on a the fiber material 2 facing (here upper) side, in contrast to previous practice no smooth, but a roughened surface 23 has.
  • a certain surface roughness having surface 23 promotes the holding and driving the fiber material 2 during transport, especially when according to Fig. 9 both straps 6a, 6b are roughened on their facing, fiber-carrying sides.
  • the Unterriemchen 6a of FIG. 10 is provided on its opposite surface 24, which leads no fiber material and facing away from the fiber-carrying surface 23, with at least one longitudinally continuous channel 25a.
  • the thickness d of the strap 6a is reduced even further in this area, which leads to a further reduction of the flexing when overflowing the deflection surface 21a (FIG. 7). Therefore, it is of course expedient, above all, also to provide the top apron 6b (FIG. 11) with such a longitudinal channel 25b in order to reduce the flexing process also in the region of the deflection surface 21b.
  • FIGS. 12 and 13 Another variant for the straps 6a, 6b is shown in FIGS. 12 and 13. Thereafter, the surface 23 (Fig. 8) is not roughened as in Fig. 8 and 9, but with in Lekss, Transport direction provided by continuous, formed in the manner of saw teeth longitudinal grooves 26a. In these longitudinal grooves 26a, the fibers of the fiber material 2 can lay during transport, whereby a running away transversely to the transport direction running away of the fibers is prevented. This is especially true when the upper apron 6b is provided on its side facing the lower apron 6a with corresponding longitudinal grooves 26b (FIG. 13).
  • FIG. 14 and 15 show an embodiment in which on the side facing away from the fiber material 2 side of the straps 6a, 6b meandering a plurality of longitudinal channels 27a, 27b are introduced, for example by grinding.
  • This embodiment is particularly useful for the upper apron 6b, where the flexing in the region of the deflecting 5b so far represents a problem.
  • FIG. 16 shows an exemplary embodiment in which a longitudinal channel 28a, 28b in the respective strap surface is formed on the sides of both straps 6a and 6b which carry fibers.
  • These longitudinal channels 28a, 28b are arranged so that they face each other in the state of use with their open sides and thereby form a chamber extending in the transport direction for the fiber material 2, which reliably prevents lateral escape of the fiber material 2.
  • the same effect can also be achieved in that only one of the two straps 6a, 6b is formed with a longitudinal channel 28a, 28b in FIG. 16 and adjoins it with the smooth or roughened or otherwise shaped surface of the respective other strap facing it.
  • Such a Riemchenform is particularly in the
  • straps 6a, 6b which, on their sides facing away from the fiber material 2, are provided with surfaces which have favorable coefficients of friction.
  • this can be achieved, for example, by virtue of the fact that the straps 6a, 6b designed on their rear side 29 facing away from the fiber material 2 have a fabric insert 30 which protrudes at least partially from the remaining strapping material and with respect to the material of the deflecting elements 5a, 5b has a low coefficient of friction.
  • An opposite surface 31 of the straps 6a, 6b intended for guiding the fibers can in this case be made of a material suitable for guiding the fibers.
  • FIGS. 17 and 18 are therefore used with particular advantage for the driven upper aprons 6b in order to obtain favorable friction conditions in the region of the deflecting element 5b.
  • straps in particular Oberriemchen, preferably made of a slightly elastic material such.
  • polyurethane since in this case for tensioning the straps the material inherent elasticity can be used.
  • the upper apron 6b it is expedient for the upper apron 6b to provide a tensioning element 8 corresponding to the tensioning means.
  • the deflection elements 5a, 5b are preferably formed and arranged so that the jaw width in
  • Region of the exit slit 7 of the straps 6a, 6b can be adjusted continuously and reproducibly.
  • the invention is not limited to drafting systems with three pairs I, II and III of drafting system organs, but can be applied in particular in drafting systems with four or more pairs of drafting device organs.
  • the various features may be applied in combinations other than those described and illustrated.

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

Abstract

L'invention concerne une machine d'étirage pour l'affinement de matériaux fibreux, qui présente au moins un premier module à courroie doté d'un cylindre (4b), au moins un élément de renvoi (5b) disposé à distance du cylindre et présentant une surface de renvoi et une première courroie (6b) posée autour du cylindre (4b) et de la surface de renvoi. Selon l'invention, dans sa partie occupée par la surface de renvoi (21b), l'élément de renvoi (5b) présente un rayon de courbure de moins de 2 mm et la courroie (6b) une épaisseur (d) d'au plus 0,7 mm.
PCT/DE2007/002222 2006-12-11 2007-12-10 Machine d'étirage pour l'affinement de matériaux fibreux et courroie appropriée Ceased WO2008071170A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102006058797.9 2006-12-11
DE102006058797 2006-12-11
DE102007001585.4 2007-01-10
DE102007001585.4A DE102007001585B4 (de) 2006-12-11 2007-01-10 Streckwerk zur Verfeinerung von Fasermaterial und dafür geeignetes Riemchen

Publications (1)

Publication Number Publication Date
WO2008071170A1 true WO2008071170A1 (fr) 2008-06-19

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ID=39316398

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2007/002222 Ceased WO2008071170A1 (fr) 2006-12-11 2007-12-10 Machine d'étirage pour l'affinement de matériaux fibreux et courroie appropriée

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DE (1) DE102007001585B4 (fr)
WO (1) WO2008071170A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1281904B (de) * 1960-12-12 1968-10-31 Deering Milliken Res Corp Riemchenstreckwerk fuer Spinnmaschinen und Spinnereimaschinen
US5479680A (en) * 1990-04-06 1996-01-02 Stalder; Herbert Sliver drafting apparatus
DE19730098A1 (de) * 1997-06-04 1998-12-10 Rieter Ag Maschf Hochverzugsstreckwerk
DE102004023896A1 (de) * 2004-05-12 2005-12-08 Maschinenfabrik Rieter Ag Streckwerk für Spinnmaschinen
WO2008000451A1 (fr) * 2006-06-28 2008-01-03 Oerlikon Textile Gmbh & Co. Kg Manchon d'étirage pour des systèmes d'étirage de fibres

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2057592A5 (en) * 1969-08-29 1971-05-21 Muller Pierre Laminated strips for textile fibre prodn
DD215593A1 (de) * 1983-03-14 1984-11-14 Wtz Baumwollind Verfahren zur herstellung von streckwerkriemchen
DE3922507A1 (de) * 1989-07-08 1991-01-17 Bockemuehl Wuellenweber Horst Transportriemen fuer garne
CN1826441B (zh) * 2003-03-06 2011-07-06 赖因哈德·柯尼希 针织物及其生产这种针织物的方法和装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1281904B (de) * 1960-12-12 1968-10-31 Deering Milliken Res Corp Riemchenstreckwerk fuer Spinnmaschinen und Spinnereimaschinen
US5479680A (en) * 1990-04-06 1996-01-02 Stalder; Herbert Sliver drafting apparatus
DE19730098A1 (de) * 1997-06-04 1998-12-10 Rieter Ag Maschf Hochverzugsstreckwerk
DE102004023896A1 (de) * 2004-05-12 2005-12-08 Maschinenfabrik Rieter Ag Streckwerk für Spinnmaschinen
WO2008000451A1 (fr) * 2006-06-28 2008-01-03 Oerlikon Textile Gmbh & Co. Kg Manchon d'étirage pour des systèmes d'étirage de fibres

Also Published As

Publication number Publication date
DE102007001585A1 (de) 2008-06-12
DE102007001585B4 (de) 2020-02-13

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