US3557543A - Method and apparatus for parallelizing staple fibers fed to a spinning chamber - Google Patents

Method and apparatus for parallelizing staple fibers fed to a spinning chamber Download PDF

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Publication number
US3557543A
US3557543A US827548A US3557543DA US3557543A US 3557543 A US3557543 A US 3557543A US 827548 A US827548 A US 827548A US 3557543D A US3557543D A US 3557543DA US 3557543 A US3557543 A US 3557543A
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United States
Prior art keywords
duct
staple fibers
fibers
stream
spinning chamber
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Expired - Lifetime
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US827548A
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English (en)
Inventor
Hans Walter Krause
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
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Maschinenfabrik Rieter AG
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Publication date
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
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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
    • D01H4/38—Channels for feeding fibres to the yarn forming region

Definitions

  • This invention relates to a method and apparatus for introducing staple fibers in parallel relation into a spinning chamber of an open end spinning device. More particularly, this invention relates to a method and apparatus for placing staple fibers in parallel.
  • feed devices have been known for feeding staple fibers into a spinning chamber possessing a rotating fiber collecting surface of an open end spinning device.
  • the individual fibers have been accelerated through narrowing feed ducts into the spinning chambers to speeds approximately the circumferential speeds of the fiber collecting surface in order to straighten the otherwise curved fibers and to bring the fibers into the direction of flow of the air stream.
  • This fiber parallelization for feeding into the fiber collecting surface while being advantageous as such, however, has the disadvantage that for aerodynamic reasons the distances over which the fibers are accelerated must be relatively long, i.e. the taper of the narrowing feed duct must be feeble or of minimum value if vortex formation is to be suppressed.
  • the ratio of cross-section areas of the duct at the entry and at the exit must be chosen according to the ratio of input and output speeds of the fibers.
  • the exit cross-section area on the other hand, cannot be reduced below a certain minimum for manufacturing and technological reasons.
  • the dimensions of entry and exit cross-section areas and of the length of the duct require determination to a large extent after the ratio of speeds is chosen. This severely limits freedom of design.
  • the invention provides a method and apparatus of concentrating, parallelizing and accelerating a flow of staple fiber within a concentrated cross-sectional area within a feed duct for delivery to a fiber collecting surface in an open end spinning device.
  • the method comprises the steps of transporting a stream of staple fibers through a feed duct in an air stream under a suction force and of vigorously accelerating and pushing the staple fiber away from the interior walls of the feed duct by the use of an additional air stream directed into the interior of the duct from the extreior.
  • the additional air stream is directed into the feed duct at an intermediate free zone of the duct so as to circumferentially envelop the stream of staple fibers within a jacket or coat of air which is substantially free of staple fiber.
  • the apparatus for implementing the method includes an acceleration duct which is positioned between a fiber input point and a spinning chamber held under vacuum.
  • the duct which serves to feed a stream of staple fibers from the input point to the spinning chamber is interrupted within a short free or open zone so that exterior air can be drawn into the confines of the feed duct substantially circumferentially about the stream of staple fiber passing through the duct so as to circumferentially envelop the staple fiber stream.
  • the free zone is further in communication with a suitable chamber about the feed duct which contains a supply of air at a higher pressure than the interior of the duct.
  • the additional air which is drawn into the feed duct from the free zone serves to concentrate the staple fibers towards the center of the feed duct while maintaining the boundary layer along the interior of the feed duct substantially free of staple fiber.
  • the additional air also serves to accelerate the staple fibers while allowing the duct to have substantially the same size inlet and exit openings for difierent inlet and exit speeds for the staple fibers.
  • FIG. 1 illustrates a cross-sectional view of an open end spinning device incorporating an apparatus according to the invention
  • FIG. 2 illustrates a top view of the structure of FIG. 1
  • FIG. 3 illustrates a cross-sectional view of a modified apparatus according to the invention
  • FIGS. 4 and 5 each illustrate a cross-sectional view of other modified feed ducts according to the invention.
  • FIG. 6 illustrates a further modified feed duct according to the invention.
  • a sliver 1 of staple fibers is supplied at an input point to a needled opening roll 2 of known construction rotatably mounted within a substantially enclosed chamber of a housing.
  • the roll 2 serves, under ideal conditions, to take 01f individual fibers 3 from the sliver 1 and to transfer the fibers 3 to an air stream which enters the housing axially through an opening 4 and then flows radially of the roller chamber to a feed duct 5 within the housing.
  • the feed duct 5 is in.
  • a spinning chamber -6 in the housing which possesses a rotatable fiber collecting surface 7 mounted on a rotor 8.
  • the rotor 8 serves to rotate the collecting surface 7, as is known, at high rotational speeds sufficient to generate a vacuum.
  • said feed duct has a section between said free zone and the spinning chamber, said section having a funnel-like end overlapping said free zone.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US827548A 1968-05-24 1969-05-26 Method and apparatus for parallelizing staple fibers fed to a spinning chamber Expired - Lifetime US3557543A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH791068A CH464026A (de) 1968-05-24 1968-05-24 Verfahren zum Parallelisieren von Stapelfasern in einem Speisekanal zu einer Spinnkammer einer Offenend-Spinnvorrichtung und Vorrichtung zur Durchführung des Verfahrens

Publications (1)

Publication Number Publication Date
US3557543A true US3557543A (en) 1971-01-26

Family

ID=4332236

Family Applications (1)

Application Number Title Priority Date Filing Date
US827548A Expired - Lifetime US3557543A (en) 1968-05-24 1969-05-26 Method and apparatus for parallelizing staple fibers fed to a spinning chamber

Country Status (5)

Country Link
US (1) US3557543A (de)
CH (1) CH464026A (de)
DE (1) DE1925999A1 (de)
FR (1) FR2009234A1 (de)
GB (1) GB1264882A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52143427U (de) * 1976-04-16 1977-10-31
US4539808A (en) * 1982-03-20 1985-09-10 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Fiber control apparatus in an open-end spinning frame
WO1986007392A1 (en) * 1985-06-07 1986-12-18 Alan Nicholas Jacobsen Improved method and apparatus for spinning yarn
US4998404A (en) * 1988-12-23 1991-03-12 Savio S.P.A. Method and device for removing deteriorated fibres during yarn rejoining in an open-end spinning machine
US5117622A (en) * 1989-05-18 1992-06-02 Hans Stahlecker Fiber supply arrangement for open-end rotor spinning
US5361574A (en) * 1992-08-22 1994-11-08 Rieter Ingolstadt Spinnereimaschinenbau Ag Process and device for pneumatic feeding of fibers to the fiber collection surface of an open-end spinning element
US5373690A (en) * 1992-08-22 1994-12-20 Rieteringolstadt Spinnereimaschinenbau Ag Process and device for pneumatic conveying of fibers to the fiber collection surface of an open-end spinning element

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS150358B1 (de) * 1969-09-16 1973-09-04
CS168160B1 (de) * 1972-06-08 1976-05-28
DE2364261C3 (de) * 1973-12-22 1982-12-23 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt Faserzuführvorrichtung für eine mit Unterdruck arbeitende Offen-End-Spinnvorrichtung
CS183469B1 (en) * 1976-07-08 1978-06-30 Ludvik Fajt Method of and apparatus for conveying fibrous material in open-end rotor spinning machines
DE2811882A1 (de) * 1978-03-18 1979-10-04 Barmag Barmer Maschf Offenend-spinnvorrichtung
IN166212B (de) * 1984-11-13 1990-03-31 Rieter Ag Maschf
JPH0742618B2 (ja) * 1985-08-10 1995-05-10 株式会社豊田自動織機製作所 吸着加撚紡績装置
DE102011102883A1 (de) 2011-05-31 2012-12-06 Oerlikon Textile Gmbh & Co. Kg Offenend-Spinnvorrichtung
FR3114188B1 (fr) 2020-09-11 2024-01-12 Dolphin Design Polarisation adaptative de substrat utilisant des détecteurs de marge

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52143427U (de) * 1976-04-16 1977-10-31
JPS5642370Y2 (de) * 1976-04-16 1981-10-03
US4539808A (en) * 1982-03-20 1985-09-10 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Fiber control apparatus in an open-end spinning frame
WO1986007392A1 (en) * 1985-06-07 1986-12-18 Alan Nicholas Jacobsen Improved method and apparatus for spinning yarn
GB2188337A (en) * 1985-06-07 1987-09-30 Jacobsen Alan Nicholas Improved method and apparatus for spinning yarn
US4821505A (en) * 1985-06-07 1989-04-18 Jacobsen Alan N Method and apparatus for spinning yarn
GB2188337B (en) * 1985-06-07 1989-07-26 Jacobsen Alan Nicholas Improved method and apparatus for spinning yarn
US4998404A (en) * 1988-12-23 1991-03-12 Savio S.P.A. Method and device for removing deteriorated fibres during yarn rejoining in an open-end spinning machine
US5117622A (en) * 1989-05-18 1992-06-02 Hans Stahlecker Fiber supply arrangement for open-end rotor spinning
US5361574A (en) * 1992-08-22 1994-11-08 Rieter Ingolstadt Spinnereimaschinenbau Ag Process and device for pneumatic feeding of fibers to the fiber collection surface of an open-end spinning element
US5373690A (en) * 1992-08-22 1994-12-20 Rieteringolstadt Spinnereimaschinenbau Ag Process and device for pneumatic conveying of fibers to the fiber collection surface of an open-end spinning element

Also Published As

Publication number Publication date
DE1925999A1 (de) 1969-12-04
CH464026A (de) 1968-10-15
FR2009234A1 (de) 1970-01-30
GB1264882A (de) 1972-02-23

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