WO2020109554A1 - Paire de cylindres pour un dispositif d'étirage d'un métier à filer, comprenant un cylindre inférieur et un cylindre supérieur, ainsi que dispositif d'étirage de ce type - Google Patents

Paire de cylindres pour un dispositif d'étirage d'un métier à filer, comprenant un cylindre inférieur et un cylindre supérieur, ainsi que dispositif d'étirage de ce type Download PDF

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Publication number
WO2020109554A1
WO2020109554A1 PCT/EP2019/083093 EP2019083093W WO2020109554A1 WO 2020109554 A1 WO2020109554 A1 WO 2020109554A1 EP 2019083093 W EP2019083093 W EP 2019083093W WO 2020109554 A1 WO2020109554 A1 WO 2020109554A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
pair
rollers
profiling
lower roller
Prior art date
Application number
PCT/EP2019/083093
Other languages
German (de)
English (en)
Inventor
Karoline Günther
Holger Janssen
Heinz-Josef Peuker
Chandrassekaran Seshayer
Ralf Siewert
Original Assignee
Saurer Spinning Solutions Gmbh & Co. Kg
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 Saurer Spinning Solutions Gmbh & Co. Kg filed Critical Saurer Spinning Solutions Gmbh & Co. Kg
Publication of WO2020109554A1 publication Critical patent/WO2020109554A1/fr

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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
    • D01H5/74—Rollers or roller bearings
    • D01H5/78—Rollers or roller bearings with flutes or other integral surface characteristics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H27/00—Special constructions, e.g. surface features, of feed or guide rollers for webs

Definitions

  • ROLLER PAIRS FOR A DRAWER FOR A SPINNING MACHINE WITH A BOTTOM ROLL AND A TOP ROLLER, AND SUCH A STRETCHER
  • the invention relates to a pair of rollers for a drafting system for a spinning machine, in particular for an air spinning machine, with a lower roller and an upper roller and such a stretching work.
  • the drafting system enables a sliver to be produced in the spinning process, for example by means of a ring spinning machine or an air spinning machine, which is warped to final fineness.
  • Air spinning is a spinning process that is now established alongside the well-known spinning processes, such as ring spinning, compression spinning and rotor spinning, in which a yarn can be spun by the controlled use of air flow in an air spinning unit.
  • the drafting system on the air spinning machine is connected upstream of the air spinning unit in the fiber transport direction. At the end of the drafting system formed by a pair of output rollers, the warped sliver passes through a nozzle block of the downstream air spinning unit of the air spinning machine to an inlet opening of a hollow spinning spindle assigned to the air spinning unit.
  • the free ends of the fiber band are looped when entering the spinning spindle by a directional air stream circulating around a cone-shaped spindle head and thereby wind spirally around the core fibers while the thread is being drawn into the spindle.
  • the core fibers form together with the so-called wrapping fibers, which are wound spirally around the core fibers, the air-spun yarn.
  • the several pairs of rollers are used to transport the fiber sliver in the direction of the inlet opening of the hollow spinning spindle, the peripheral speed of the roller pairs increasing in the direction of transport of the fiber sliver to increase its delay to reach.
  • the high rotational speeds of the output rollers of the drafting system generate air currents 37, as shown by way of example in FIG. 6, which can result in individual fibers 38, as shown by way of example in FIG.
  • the invention has for its object to provide a drafting system and a pair of rollers for a drawing machine of a spinning machine, in particular an air spinning machine, in which a fiber deflection due to a rotation-induced air flow of the pair of rollers is minimized.
  • the invention solves the problem by a pair of rollers for a drafting system of a spinning machine, in particular an air spinning machine, which is characterized in that a peripheral surface of the lower roller and / or upper roller has a profile which is designed such that one in use on the lower roller and the top roller occurring air flow is bundled in the transport direction of a sliver to be conveyed.
  • Profiling the surface of one or both rollers on their circumference is essential for the function of the proposed pair of rollers, the profile u. a. Its orientation, shape and characteristics are such that the air flow that occurs due to the high rotational speeds of the rollers is directed or bundled in the area between the bottom roller and the top roller in such a way that the fibers of a fiber band passing through them do not come out of the fiber structure torn out, but instead be reliably conveyed with the sem towards a spinning unit, in particular the inlet opening of a nozzle block
  • the profile can preferably be designed as a micro and / or macro profile. I.e. it has an expression that extends only over a few tenths of a millimeter and / or over several millimeters.
  • the profiling enables the air flow that is unavoidable due to the rotation of the rollers to be specifically aligned and thus used positively. Due to the air flow, fibers projecting laterally from the fiber structure to be conveyed can also be held on the fiber sliver and preferably even conveyed in a parallel fiber position into the inlet opening of an air spinning unit.
  • the invention ensures a particularly high quality of the sliver and thus the possibility of producing a uniform yarn.
  • the design of the roller pairs with a Suitable profiling on one or both rollers makes it possible to dispense with expensive and cumbersome additional devices to increase the quality of the sliver.
  • the profiling can in principle be designed in any manner. This makes it possible to align the air flow that occurs in use depending on the profiling in such a way that it corresponds to an inlet opening of a downstream spinning unit.
  • the profiling can be designed in such a way that the air flows and thus the conveying direction of the sliver run in an arc shape after the pair of rollers, in order to ensure optimal feeding of the sliver into an inlet opening of a nozzle block of a hollow spinning spindle even if the inlet opening is not included the conveying direction of the conveyor belt is aligned in front of the pair of rollers.
  • a corresponding configuration thus enables the drafting system to be optimally adapted to the position of a downstream spinning unit, in particular an air spinning unit.
  • the profiling is designed such that the air flow is oriented substantially perpendicular to a plane extending through the axes of rotation of the lower roller and upper roller.
  • a corre sponding design of the profile ensures that the direction of transport of the sliver is maintained before entering the pair of rollers. This reliably prevents operational disruptions and particularly high productivity is achieved.
  • the spinning unit is appropriately aligned with the drafting system.
  • the profiling has longitudinally channeling depressions on the peripheral surface. Ver wells that channel the surface of the rollers along their circumference, ie run in a straight line, can be produced particularly easily and inexpensively by material-lifting or material-displacing forming processes.
  • a longitudinally channeling depression can be produced in a particularly simple manner, for example by using adapted grinding devices, which make it possible to form the depressions in any desired orientation and shape on the peripheral surface.
  • the profiling formed by the depressions is preferably such that the air flows occurring during operation are directed such that they are bundled in the direction of the spinning unit, in particular in the direction of the air spin unit.
  • the shape of the depressions that are preferably provided for this purpose can in principle be freely selected in order to achieve an optimal air flow.
  • the depressions have a symmetrical cross section.
  • Wells with a symmetrical cross-section can be manufactured particularly easily and inexpensively using standardized processes and devices. Compared to the production of recesses with a variable or asymmetrical cross-section, the special tools required for this can be dispensed with.
  • the depressions which preferably form the profile can be arranged running parallel to the axis of rotation of the lower roller and / or upper roller on the peripheral surface.
  • the depressions are angled at the circumferential surface of the lower roller and / or upper roller in a single or multiple manner relative to the axis of rotation of the lower roller and / or upper roller.
  • the profiling has depressions which extend in the circumferential direction from the lower roller and / or upper roller and are angled with respect to the axis of rotation of the lower roller and / or upper roller, the depressions extending in the circumferential direction adjoining and / or crossing the angled depressions.
  • Such a profile based on a tire tread, is characterized by a particularly constant, directed and reliable air flow in the direction of transport of the conveyor belt, even at high rotational speeds of the top and bottom rollers. The resulting air flow is reliably bundled and directed via the channels formed on the peripheral surface.
  • the profiling is preferably provided outside the contact surface, which is designed to convey the sliver.
  • the yarn quality can be avoided from the outset.
  • the profiling in the edge regions, in other words off-center, of the lower roller or the upper roller is particularly preferred. educated.
  • the sliver can be conveyed in a reliable manner in the center in an elongated direction, which is parallel to the axis of rotation, from the lower roller or upper roller.
  • the profiling can in principle be introduced directly into a peripheral surface of the lower roller and / or upper roller, for example by means of suitable processing devices.
  • the lower roller and / or upper roller is preferably formed from an elastomer, particularly preferably from a thermoplastic elastomer, which has a positive influence on the generation of the air flow.
  • the profiling can be introduced inexpensively and in a simple manner into the peripheral area of the lower roller and / or upper roller.
  • the profiling is arranged on a running layer applied to the peripheral surface of the lower roller and / or upper roller.
  • the running layer is a material layer which differs from the material of the upper or lower roller and which is arranged in the manner of a jacket on the outer surface of the lower roller and / or upper roller.
  • This embodiment of the invention makes it possible to form the contact surface of the lower roller and / or upper roller from a material which, owing to its surface properties, is particularly suitable for conveying the sliver.
  • the material for the running layer can be selected taking into account the surface roughness, which also has an influence on the air flow occurring during use.
  • the attachment of a separate running layer also allows a possibly inexpensive repair, since then a complete exchange of the lower roller and / or upper roller is avoided and instead only an exchange of the running layer can take place.
  • the selection of the roller pair or rollers of the drafting system to be profiled can basically be made taking into account the process parameters. According to a further embodiment of the invention, however, it is provided that the lower roller is designed as an output lower roller and the upper roller as an output upper roller, at least or only the upper output roller having the profiling. A profiling of the lower roller can be dispensed with in accordance with this preferred alternative, a bundled air flow being achieved at the same time.
  • This embodiment of the invention enables a particularly inexpensive position of the pair of rollers, the profiled top roller being combined, for example, with bottom rollers which are already provided with corrugations or the like.
  • the above task is also performed with a running layer as described above for a Roll pair of a drafting system of a spinning machine, in particular an air spinning machine, solved, wherein the running layer has one of the above-described, preferably formed pro filations.
  • the running layer is further preferably designed to be able to be arranged on an output upper roller of the pair of rollers of the drafting system.
  • the running layer as described above by way of example for the choice of material for the profiling, can be formed from a corresponding material, for example an elastic material, such as in particular a rubber-containing material, a plastic-containing material and / or a metal-containing material.
  • an elastic material such as in particular a rubber-containing material, a plastic-containing material and / or a metal-containing material.
  • a drafting system for a spinning machine in particular an air spinning machine, which comprises a pair of rollers as described above.
  • the proposed drafting system which has at least one pair of rollers having a lower roller and an upper roller, that at least one circumferential surface of the lower roller and / or upper roller has a profiling which is designed such that one occurring on the lower roller and the upper roller in use Air flow in the direction of transport of a sliver to be conveyed is bundled.
  • a corresponding design of the drafting system ensures a particularly reliable guidance of the fiber web to be conveyed, whereby a lateral protrusion of fibers with the risk of a corresponding tearing of these fibers is effectively prevented by the directed air flow.
  • the roller pair is particularly preferably designed as an output roller pair.
  • This development of the invention ensures to a particular extent that the fiber sliver is reliably fed to the inlet opening of the spinning unit which is connected to the pair of output rollers.
  • more pairs of rollers of the drafting system can each be formed with a profile, which bundles the resulting air flow in the direction of transport of the sliver to be conveyed in use on the lower roller and the upper roller, thereby increasing the quality of the sliver in a complementary manner.
  • the preferred embodiments described above are particularly advantageous for an air spinning machine. In any case, the preferred embodiments described above can also be used in other types of spinning machines, such as, for example, ring spinning machines, flyers, compact spinning machines, siro spinning machines and others.
  • Figure 1 is a schematic representation of an air spinning machine with a drafting device and an air spinning unit, partly in section.
  • Fig. 2 is a schematic perspective view of a first embodiment of a
  • Fig. 3 is a schematic perspective view of a second embodiment of a
  • Fig. 4 is a schematic perspective view of a third embodiment of a
  • Fig. 5 is a schematic perspective view of a fourth embodiment of a
  • Fig. 6 is a schematic perspective view of a pair of output rollers with he generated air flows according to the prior art.
  • FIG. 1 shows a highly simplified, schematic illustration of a side view of an air spinning machine 1 with a drafting device 2 and an air spinning unit 3 adjoining the drafting device 2 in the conveying direction of a fiber sliver 4.
  • the sliver 4 drawn off from a spinning can (not shown here) is drawn in by the upper roller 9 and lower roller 10 arranged as a feed roller pair 5 and drawn further in the course of the drafting unit 2 by means of the first middle roller pair 7, the second middle roller pair 8 and the output roller pair 6.
  • first middle pair of rollers 7 conveys the sliver 4 between the top roller 13 and the bottom roller 14
  • the top roller 15 and the bottom roller 16 of the second middle pair of rollers 8 interact with straps 17, 18.
  • the fiber sliver 4 is transported through the drafting unit 2 to the air spinning unit 3, with the peripheral speed of the roller pairs 5, 6, 7, 8 increasing in the transport direction of the fiber sliver.
  • a first draft zone 19 the sliver 4 is drawn two to four times.
  • the sliver 4 is further drawn.
  • the sliver 4 receives its final fineness, which corresponds to the yarn fineness.
  • the output top roller 1 1a and the output bottom roller 12a designed as an output roller pair 6a generate, on the basis of a profile 35a on their surfaces 33, 34, an air flow directed in the direction of the air spinning unit 3, which bundles the sliver 4 in the direction of an inlet opening of the air spinning unit 3 (cf. Fig. 2).
  • a nozzle device 23 is arranged on the input side of the air spinning unit 3.
  • the nozzles 24, 25 are connected to a compressed air source 27 via lines 26.
  • the air flowing out of nozzles 24, 25 generates a rotational flow with which the drawn fiber sliver 4 is acted upon. This is followed by a hollow spinning cone 29.
  • the yarn 30 formed in the interaction of Düsenein device 23 and spinning cone 29 is withdrawn from the air spinning unit 3 through the hollow spinning cone 29.
  • An air chamber 31 surrounding the spinning cone 29 is connected to a vacuum source 32 by means of a further line 28.
  • FIG. 2 shows a first embodiment of the output roller pair 6a, in which a surface 33, 34 of the output top roller 11a and output bottom roller 12a has depressions 36 which run parallel to an axis of rotation and form a profile 35a.
  • FIG. 3 shows a second embodiment of a pair of output rollers 6b, in which the profile 35b is formed by depressions 36 which run obliquely on the surface 33, 34 of the output top roller 11b and the output bottom roller 12b.
  • a third embodiment of a pair of output rollers 6c is shown in FIG. 4, in which the profile 35c on the top output roller 11c and the bottom output roller 12c is formed by angled recesses 36 on the surface 33, 34.
  • the top output roller 11d has a profile 35d which is formed by intersecting and adjacent recesses 36 which run in the circumferential direction and diagonally, whereas the output bottom roller 12d has no profile on its surface 34 (FIG 5).
  • the respective profiling 35a shown in FIGS. 35b; 35c; 35d outside a contact surface of the lower roller 11a; 11b; 11c; 11 d or top roller 12a; 12b; 12c; 12d be formed, via which contact surface the sliver 4 from the lower roller 11a; 11b; 11c; 11d or top roller 12a; 12b; 12c; 12d is promoted or transported.
  • the profiling 35a; 35b; 35c; 35d only in the edge regions or edge portions of the lower roller 11a; 11b; 11c; 11d or top roller 12a; 12b; 12c; 12d be formed off-center.
  • the lower roller 11a; 11b; 11c; 11 d or top roller 12a; 12b; 12c; According to this preferred embodiment (not shown), 12d thus has three sections along the axis of rotation consisting of the two edge regions with the contact surface interposed.
  • Air spinning machine 19 first draft
  • Air spinning unit 20 second advance

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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 paire de cylindres pour un dispositif d'étirage d'un métier à filer (1), en particulier d'un métier à filer à air, comprenant un cylindre inférieur (10, 12a - 12d, 14, 16) et un cylindre supérieur (9, 11a - 11d, 13, 15), ainsi qu'un dispositif d'étirage de ce type. L'invention vise à fournir un dispositif d'étirage ainsi qu'une paire de cylindres pour un dispositif d'étirage d'un métier à filer (1), dans lequel une déviation de fibres est minimisée en fait de l'écoulement d'air, lié à la rotation, de la paire de cylindres. L'invention prévoit qu'une surface périphérique (33, 34) du cylindre inférieur (10, 12a - 12d, 14, 16) et/ou du cylindre supérieur (9, 11a - 11d, 13, 15) comporte un profilage (35a, 35b, 35c, 35d) réalisé de telle manière qu'un écoulement d'air entrant lors de l'utilisation sur le cylindre inférieur (10, 12a - 12d, 14, 16) et sur le cylindre supérieur (9, 11a - 11d, 13, 15) est regroupé dans une direction de transport d'une bande de fibres (4) à convoyer.
PCT/EP2019/083093 2018-11-30 2019-11-29 Paire de cylindres pour un dispositif d'étirage d'un métier à filer, comprenant un cylindre inférieur et un cylindre supérieur, ainsi que dispositif d'étirage de ce type WO2020109554A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018130523.0 2018-11-30
DE102018130523.0A DE102018130523A1 (de) 2018-11-30 2018-11-30 Walzenpaar für ein Streckwerk für eine Spinnmaschine, mit einer Unterwalze und einer Oberwalze sowie ein solches Streckwerk

Publications (1)

Publication Number Publication Date
WO2020109554A1 true WO2020109554A1 (fr) 2020-06-04

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PCT/EP2019/083093 WO2020109554A1 (fr) 2018-11-30 2019-11-29 Paire de cylindres pour un dispositif d'étirage d'un métier à filer, comprenant un cylindre inférieur et un cylindre supérieur, ainsi que dispositif d'étirage de ce type

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DE (1) DE102018130523A1 (fr)
WO (1) WO2020109554A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE909314C (de) * 1951-08-09 1954-04-15 Wilhelm Heiss Geriffelter Spinnzylinder
JPS6164167U (fr) * 1984-10-02 1986-05-01
JPH04110769U (ja) * 1991-03-08 1992-09-25 村田機械株式会社 ドラフト装置
JPH05156527A (ja) * 1991-12-09 1993-06-22 Murata Mach Ltd フロントローラー
CN103103650A (zh) * 2012-12-10 2013-05-15 苏州尊元纺织有限公司 一种纺织机械的新型罗拉

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2930587A1 (de) * 1979-07-27 1981-02-12 Taschkentskoe Sp K Bjuro Tekst Streckwerk zum strecken und diskretisieren von fasergut
DE3920020A1 (de) * 1989-03-07 1990-09-13 Fritz Stahlecker Streckwerk fuer eine spinnmaschine
DE4205103A1 (de) * 1992-02-20 1993-08-26 Bernhard Schwabe Vorrichtung zum vermeiden von querstroemungen im bereich des klemmspaltes von walzenpaaren in spinnereimaschinen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE909314C (de) * 1951-08-09 1954-04-15 Wilhelm Heiss Geriffelter Spinnzylinder
JPS6164167U (fr) * 1984-10-02 1986-05-01
JPH04110769U (ja) * 1991-03-08 1992-09-25 村田機械株式会社 ドラフト装置
JPH05156527A (ja) * 1991-12-09 1993-06-22 Murata Mach Ltd フロントローラー
CN103103650A (zh) * 2012-12-10 2013-05-15 苏州尊元纺织有限公司 一种纺织机械的新型罗拉

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