EP0175862B1 - Verfahren und Vorrichtung zur Herstellung eines Garnes - Google Patents

Verfahren und Vorrichtung zur Herstellung eines Garnes Download PDF

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Publication number
EP0175862B1
EP0175862B1 EP85108613A EP85108613A EP0175862B1 EP 0175862 B1 EP0175862 B1 EP 0175862B1 EP 85108613 A EP85108613 A EP 85108613A EP 85108613 A EP85108613 A EP 85108613A EP 0175862 B1 EP0175862 B1 EP 0175862B1
Authority
EP
European Patent Office
Prior art keywords
yarn
opening
friction spinning
formation position
fibres
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.)
Expired
Application number
EP85108613A
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German (de)
English (en)
French (fr)
Other versions
EP0175862A1 (de
Inventor
Herbert Stalder
Josef Baumgartner
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
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Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4278731&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0175862(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Priority to AT85108613T priority Critical patent/ATE37049T1/de
Publication of EP0175862A1 publication Critical patent/EP0175862A1/de
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Publication of EP0175862B1 publication Critical patent/EP0175862B1/de
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
    • D01H4/16—Friction spinning, i.e. the running surface being provided by a pair of closely spaced friction drums, e.g. at least one suction drum
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
    • D01H4/06—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface co-operating with suction means

Definitions

  • the invention relates to an open-end friction spinning method and to an apparatus for producing a yarn and the like, wherein fibers are detached from a fiber structure, the detached fibers by means of a pneumatic fiber conveying air stream flying freely onto a moving, perforated surface of a friction spinning agent under vacuum are transferred, the fiber conveying air flow being arranged at least up to shortly before the perforated surface, the fibers are then transported by means of this perforated surface in a substantially elongated form to a yarn formation point in which the fibers are formed into a yarn, and the yarn is withdrawn from the yarn formation point in a predetermined direction.
  • a method of this type and an apparatus for carrying out the method according to the preamble of claim 5 are known from DE-A-3300636.
  • these free-flying fibers have to be conveyed in a pneumatic conveying channel and accordingly have a final speed which can be a power of ten higher than the take-off speed of the yarn, so that the fibers hitting the gusset area are braked to such a lower speed. that they take on any loop position on impact and essentially maintain this loop position in the twisted yarn.
  • Loop layers of the fibers in a yarn reduce the strength of the yarn and provide a source of irregularities, since the large number of fibers arriving at the same time, which are placed in loop layers, produce a tangle of fibers.
  • a loop layer shortens the usable fiber length.
  • the loop position of a fiber is to be understood as a fiber which is significantly shortened in its aforementioned usable length by forming loops.
  • Coarser yarns are to be understood as yarns that are mainly used for the production of decorative fabrics.
  • an open-end friction spinning device is proposed with two rollers arranged in close proximity and forming a wedge gap, driven in the same direction, at least one of which is designed as a suction roller - is.
  • a suction roller opens a conveying channel which is arranged in the circumferential direction of the suction roller at a certain distance from the wedge gap.
  • the edge of the conveying channel opening facing the wedge gap is designed as a deflection guide for the fed fibers.
  • This configuration is intended to ensure that the fibers are braked on the deflection guide while they are being pulled out of the feed channel by means of the suction roll and are thereby mechanically stretched.
  • the fibers are parallelized by this stretching and get into this stretched and parallelized shape in the wedge gap between the. two rollers.
  • the fibers which hit the end of the yarn forming in the yarn formation point perpendicular to the yarn take-off direction then undergo a further deflection in the yarn take-off direction, aiming for a double acceleration and thus a safe stretching of the fibers becomes.
  • the mechanical stretching effect is said to lead to an improvement in fiber deposition.
  • the disadvantages of such a device are that the fibers are subjected to friction on the one hand, without which this stretching cannot be achieved, and on the other hand that the mentioned friction edge is subject to a risk of contamination is so that an accumulated ball of dirt is occasionally entrained by the passing fibers and can cause an unevenness in the yarn.
  • a method and an apparatus of the type mentioned are to be created, in which a yarn is produced by means of friction spinning means, which contains fibers with an improved stretching, the fibers being incorporated into the yarn drum on the suction drum before being incorporated into the yarn end the embedding advantageous position can be brought without the desire to give the end of the yarn a rotation.
  • FIG. 1 of a device according to the invention has a breakup roller 1 known from the rotor open-end spinning process, which is mounted and drivable in a housing 2 (only partially shown).
  • This opening roller 1 is provided with needles 3 or teeth (not shown) in a manner known per se for opening a sliver into individual fibers.
  • disintegration units with such disintegration rollers are known from rotor-open-end spinning and are therefore not described further.
  • the housing 2 has a fiber outlet opening 4, to which a fiber conveying channel 5 connects, which opens close to the cylindrical surface of a friction spinning drum 6.
  • This friction spinning drum 6 is perforated (not shown) and contains a suction channel 7 (FIG. 3a), which delimits a suction zone R on the circumference of the friction spinning drum 6 through its walls 8 and 9.
  • the walls 8 and 9 extend so close to the cylindrical inner wall of the friction spinning drum 6 that an inflow of false air is prevented as far as possible without touching the inner wall.
  • This air flow which is generated by the suction channel 7 and flows through the fiber conveying channel 5, detaches the fibers 10 detached from the needles 3 and freely flying in the conveying channel 5 within said suction zone on the surface part of the rotating friction drum 6 delimited by the mouth 11 of the conveying channel 5 in the boundary region of the suction zone given by the wall 9 of the suction channel 7, to form a yarn 12 at the yarn formation point 13, the yarn formation point being located on the imaginary continuation of the wall 9 through the cylindrical wall of the friction spinning drum 6.
  • the friction spinning drum 6 rotates in a direction indicated by the arrow U.
  • the finished yarn 12 is drawn off in a draw-off direction A by a pair of draw-off rollers 14.
  • the pair of take-off rollers can also on the opposite forehead side of the friction spinning drum 6 can be provided, which is shown with the dash-dot roller pair 14.1, ie that the yarn can also be drawn off in the direction B.
  • the first mentioned friction spinning drum 6 can be assigned a second friction spinning drum 15, which is arranged so close to the first friction spinning drum 6 that the yarn formed in the intermeshing gap of both friction spinning drums is turned into a firmer yarn than without this second drum 15.
  • the direction of rotation of the drum 15 corresponds to the direction of rotation of the drum 6, which is why both directions of rotation are designated by U.
  • the directions of rotation of the two drums in the region of the gusset gap are opposed to one another by the directions of rotation in the same direction.
  • the second friction spinning drum 15 can also be perforated and provided with a suction channel 16 delimiting a suction zone R.1 and containing the walls 17 and 18 (indicated by a dash-dotted line in FIGS. 3 and 3a).
  • the upper wall 17 (as viewed in FIG. 3) of the suction channel 16 is directed such that the imaginary continuation of this wall through the cylindrical wall of the friction spinning drum 15 intersects with the imaginary continuation of the wall 9 in the yarn formation point 13 or in a line lies, whereby the twisting of the fibers at this yarn formation point 13 is optimized by the oppositely directed air flows of the suction channels 7 and 16.
  • the walls 9 and 17, as shown in FIG. 3a are offset from one another in such a way that the yarn formation point 13 is located between the imaginary continuations of the walls 9 and 17.
  • the length (not shown) of the suction zones R and R.1 corresponds at least to the length L of the mouth 11.
  • the mouth 11 In order to obtain a sufficient distribution of the fibers over the length L of the channel mouth 11, the mouth 11 should not exceed a width D (FIGS. 3, 5, 6 and 7) of 2 mm.
  • the length L and the width D result in the cross-section of the mouth, in principle the term mouth or cross-section of the mouth should be understood to mean the narrowest point in the fiber feed channel.
  • Fig. 1 shows a fiber conveyor channel 5 with an inclination marked with the angle a, the angle a being less than 90 and by an imaginary extension of the mouth 11 and a lower wall 19 (as viewed in FIG. 3) of the channel 5 is formed.
  • the fiber conveying channel 105 shown in FIG. 4 has no inclination in the mouth region C, but opens at an angle a of essentially 90 ° against the drum surface.
  • the mouth area C has a height h of at least 10 mm.
  • the remaining elements of this figure correspond to the elements of FIG. 1 and are accordingly identified by the same reference numerals. Accordingly, the mouth, since it must meet the conditions mentioned for the fiber feed channel 5, is also designated with the number 11.
  • the fiber conveyor channels 5 and 105 can be provided with a position different from that shown in Fig. 3 with solid lines, without adverse consequences for the guidance of the free-flying fibers against the cylindrical Surface of the friction spinning drum 6.
  • the fiber feed channels in these layers are in Fig. 3a with the reference numerals 5.1 and. 105.1 and 5.2 resp. 105.2 marked.
  • an angle ⁇ shown in FIGS. 3 and 5 changes, which is formed by an imaginary plane of symmetry E of the corresponding delivery channel mouth and a tangential plane T, which is the tangential plane at the penetration line of the plane of symmetry E through which cylindrical surface of the friction spinning drum 6 is.
  • the free-flying fibers 10 have the tendency to strike the surface of the friction spinning drum 6 in the direction shown by the arrow S, essentially irrespective of the position marked with the angle ⁇ of the delivery channels.
  • FIG. 7 Another measure for the same purpose is shown in FIG. 7 with openings 22 (only one shown) in the outer, ie. H. the yarn formation point 13 facing wall 20 of the channel 5, respectively. 105.
  • the one provided between the wall 21 (FIG. 3) and the surface of the friction spinning drum 6 is intended Distance H should be as small as possible without causing direct contact between this wall and the cylindrical surface.
  • the wall 8 of the suction channel 7 can be set back against the direction of rotation U by an amount Z, so that the aforementioned ambient air is sucked in the area Z through the suction channel 7 becomes.
  • the wall 21 in the region of the mouth 11 can also an arc 23 directed against the direction of rotation U, which causes an increased deflection of the flow according to the arrow direction S.
  • the suction channel 7, respectively. 16 (Fig. 3a) is through a connecting tube 24 and. 25 each connected to a vacuum source in a manner known per se.
  • the friction spinning drums 6 and 15 are, in a manner known per se, appropriately supported and driven, which is symbolically represented by the axes a. Drive and storage of such friction spinning drums are known and not the subject of the invention.
  • FIG 8 shows a variant of the device according to the invention, in which a perforated friction spinning disc 56 is used instead of the friction spinning drum 6.
  • the disk 56 rotates in the direction of rotation K and takes over the free-flying fibers 10 delivered by the fiber conveyor channel 57.
  • This fiber conveyor channel 57 is inclined at an angle ⁇ to the surface of the friction spinning disk 56, in a manner analogous to the fiber conveyor channels 5 and 105.
  • a suction channel 58 is provided in an analogous manner to the suction channel 7, which, as shown in FIG. 11, covers an area which extends from the mouth 59 of the fiber conveyor channel 57 to beyond the yarn formation point 61, which through the Surface of the friction spinning disc 56 and a conical friction spinning roller 60 is formed.
  • the finished yarn 12 is drawn off by a pair of draw-off rollers 62.
  • the friction spinning disc is firmly connected to a shaft 63.
  • the storage and drive of the shaft 63 is not shown for the sake of simplicity and is not the subject of the invention. The same applies to the storage and the drive of the conical friction spinning roller 60.
  • the fiber feed channel 57 can be provided with an inclination angle ⁇ of less than 90 ° or, as shown in FIG. 10, of essentially 90 °.
  • the suction channel 58 can be widened in the direction opposite to the direction of movement K of the friction spinning disc 56, so that in the area designated Z.1, the air present on the surface of the moving friction spinning disc 56 in front of the mouth 59 can be sucked into the channel 58.
  • the channel 58 is connected by a connector 64 to a vacuum source (not shown).
  • the fiber conveying channels are tapered in such a way that the air conveyed therein is accelerated, so that the fibers conveyed in the air undergo at least one pre-stretching.
  • the ratio of the air speed to the circumferential speed mentioned is used in the range less than 2: 1, the strength also steadily decreases, but still results in a usable yarn with a ratio less than 1. In the same sense as the strength, the mass uniformity of the yarn is influenced by this ratio.
  • the aforementioned effect occurs, be it with an inclined arrangement, as shown in FIG. 1, or, as shown in FIG. 4, with a fiber conveying duct arranged vertically in the end part.
  • the fibers on the spinning drum begin to deposit more and more in a loop position on the spinning drum at a ratio of more than three, which becomes unfavorable as the ratio increases.
  • the fibers begin to lay more and more in an inclined position on the friction spinning drum at a ratio of the air speed to the peripheral speed which increases with decreasing peripheral speed to a maximum of the said ratio of 4: 1 increases.
  • the ratio increases, ie above 4: 1, the fibers also begin to lay down on the friction spinning drum in the aforementioned loop position.
  • the above-mentioned inclined position of the fibers on the friction spinning drum is preceded by a stretching process in the fiber conveying channel, so that the fibers on the friction spinning drum lie not only in an essentially stretched position but also in a direction on the friction spinning drum which is advantageous for forming the yarn end.
  • This advantageous direction is, however, only optimally used if the yarn withdrawal direction is such that the obliquely arranged fibers experience a further stretching when the yarn is pulled off, ie. H. if the yarn take-off direction is opposite to the fiber feed direction in the channel.
  • the front end designated 10.1 of the free flying fiber 10 from the Fritationsspinntrommel 6 it is f Asst and conveyed in the direction indicated with M direction on the Fritationsspinntrommel against the yarn formation 13, so at the same time, the rear free end 10.2 by the air flow further into the N Direction conveyed further at a higher speed, so that the fibers 10, after the front end 10.1 has covered the path corresponding to the arrow M, essentially assume a position as shown in broken lines in FIG. 1.
  • the method according to the invention therefore differs from the previously described methods in that, on the one hand, the aim is not that the fibers should assume a position parallel to the end of the yarn, and on the other hand there is no endeavor to give the end of the yarn a rotation, but rather the aforementioned rotation of the End of yarn is a by-product of the fiber wrapping process.
  • a further criterion for the uniform distribution of the free-flying fibers in the fiber conveying channel lies in the width D of the mouth 11, in which, with a width of more than 4 mm, the fibers are given too much freedom for side by side. It has been found that a width D of 2 mm must not be exceeded. The width can be reduced to 0.5 mm, with the disadvantage that this increases the flow resistance.
  • the fibers are also not completely in the circumferential direction on the friction spinning drum or perpendicular to the end of the yarn, so that the above-described winding effect is also present in this variant. Due to the steeper position of the fiber at the end of the yarn, more turns are required to wind the fiber, which results in a harder turn of the fibers, i. H. in a harder twisted yarn. Furthermore, in such a position of the fibers there is a certain risk of loop formation during the winding process, so that the strength does not necessarily increase even with harder twisted yarn.
  • the fiber speed in a tapered channel does not correspond to the air speed in the mouth area, on the other hand, the ratio of the fiber speed in the mouth to the peripheral speed of the friction spinning means is decisive for the effects mentioned, which is why the air speed is only a measurable variable , by means of which a setting value is given for a usable result.
  • An advantageous embodiment of the mouth of the fiber conveying channel 5, according to FIG. 1, consists in that the tapering of the end region of this channel ending in the mouth is designed in such a way that the air speed experiences a strong increase, so that the air flow is deflected towards the mouth. Such a deflection is indicated by the flow arrows F (FIGS. 1 and 4).
  • FIG. 11 a A variant of the device of FIGS. 8 to 11, in which the conical friction spinning roller is not arranged radially, as in FIG. 11, but at an acute angle to an imaginary tangential plane X, is shown in FIG. 11 a.
  • the acute angle 8 is enclosed by the above-mentioned tangential plane X and by an imaginary plane that contains the axis of rotation Y of the conical friction roller 60 and is perpendicular to the friction spinning disc.
  • the yarn formation point 61 is thereby inclined. Accordingly, the suction channel 58 must also be adapted to the thread formation point in the previously described sense.
  • FIG. 11 a correspond to those of FIG. 11, with the exception of the mentioned adapted suction channel 58, which is why they are provided with the same reference numerals.
  • the fibers 10 deposited on the friction spinning disc 56 reach the yarn formation point 61 in an oblique position marked with the angle 8.
  • the advantageous position mentioned earlier enables the fiber 10 to deal with the problem in the manner already described earlier the yarn formation point 61 forming yarn end are wound.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
EP85108613A 1984-09-25 1985-07-10 Verfahren und Vorrichtung zur Herstellung eines Garnes Expired EP0175862B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85108613T ATE37049T1 (de) 1984-09-25 1985-07-10 Verfahren und vorrichtung zur herstellung eines garnes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4579/84 1984-09-25
CH457984 1984-09-25

Publications (2)

Publication Number Publication Date
EP0175862A1 EP0175862A1 (de) 1986-04-02
EP0175862B1 true EP0175862B1 (de) 1988-09-07

Family

ID=4278731

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85108613A Expired EP0175862B1 (de) 1984-09-25 1985-07-10 Verfahren und Vorrichtung zur Herstellung eines Garnes

Country Status (8)

Country Link
US (1) US4628679A (ja)
EP (1) EP0175862B1 (ja)
JP (1) JPS6183328A (ja)
AT (1) ATE37049T1 (ja)
AU (1) AU585886B2 (ja)
CS (1) CS667385A3 (ja)
DE (1) DE3564828D1 (ja)
IN (1) IN165403B (ja)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN165873B (ja) * 1984-10-15 1990-02-03 Rieter Ag Maschf
DE3629498A1 (de) * 1986-08-29 1988-03-10 Brockmanns Karl Josef Dr Ing Friktionsspinnvorrichtung
DE3634792C2 (de) * 1986-10-11 1995-11-02 Schlafhorst & Co W Friktionsspinnvorrichtung
IN170278B (ja) * 1986-11-13 1992-03-07 Rieter Ag Maschf
AT385782B (de) * 1987-01-16 1988-05-10 Fehrer Textilmasch Vorrichtung zum herstellen eines garnes
IN171023B (ja) * 1987-04-29 1992-07-04 Rieter Ag Maschf
US4918913A (en) * 1987-06-12 1990-04-24 Maschinenfabrik Rieter Ag Method of, and device for, performing a start spinning operation for spinning of a yarn in a friction spinning apparatus
DE3832110A1 (de) * 1988-09-21 1990-03-29 Rieter Ag Maschf Friktionsspinnvorrichtung
DE4007607A1 (de) * 1990-03-09 1991-09-12 Schubert & Salzer Maschinen Spinnverfahren und vorrichtung zur herstellung eines garnes
AT397393B (de) * 1990-07-27 1994-03-25 Fehrer Ernst Verfahren und vorrichtung zum herstellen eines garnes
AT397822B (de) * 1991-09-26 1994-07-25 Fehrer Ernst Vorrichtung zum herstellen eines garnes

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATA169077A (de) * 1976-03-27 1990-09-15 Schlafhorst & Co W Verfahren zum spinnen von fasern zu einem faserverbund
ATA170978A (de) * 1977-03-30 1990-09-15 Schlafhorst & Co W Verfahren und vorrichtung zum spinnen eines fadens aus einzelfasern
FR2439832A1 (fr) * 1978-10-26 1980-05-23 Platt Saco Lowell Ltd Appareil et procede de filage par fibres liberees
DE3300636A1 (de) * 1983-01-11 1984-07-12 Fritz 7347 Bad Überkingen Stahlecker Oe-friktionsspinnvorrichtung
DE3308249A1 (de) * 1983-03-09 1984-09-13 Fritz 7347 Bad Überkingen Stahlecker Oe-friktionsspinnvorrichtung
DE3308250A1 (de) * 1983-03-09 1984-09-13 Stahlecker, Fritz, 7347 Bad Überkingen Oe-friktionsspinnvorrichtung
DE3318924A1 (de) * 1983-05-25 1984-11-29 Fritz 7347 Bad Überkingen Stahlecker Vorrichtung zum oe-friktionsspinnen
DE3330414A1 (de) * 1983-08-23 1985-03-14 Karl-Josef Dipl.-Ing. 4156 Willich Brockmanns Verfahren und vorrichtung zum aufbereiten der einer friktionsspinnmaschine zugefuehrten spinnfasern
IN164144B (ja) * 1984-05-18 1989-01-21 Rieter Ag Maschf

Also Published As

Publication number Publication date
DE3564828D1 (en) 1988-10-13
ATE37049T1 (de) 1988-09-15
AU4687285A (en) 1986-04-10
US4628679A (en) 1986-12-16
EP0175862A1 (de) 1986-04-02
IN165403B (ja) 1989-10-07
JPH0355568B2 (ja) 1991-08-23
JPS6183328A (ja) 1986-04-26
AU585886B2 (en) 1989-06-29
CS667385A3 (en) 1992-11-18

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