EP0363649B1 - Friktionsspinnvorrichtung - Google Patents

Friktionsspinnvorrichtung Download PDF

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Publication number
EP0363649B1
EP0363649B1 EP89116568A EP89116568A EP0363649B1 EP 0363649 B1 EP0363649 B1 EP 0363649B1 EP 89116568 A EP89116568 A EP 89116568A EP 89116568 A EP89116568 A EP 89116568A EP 0363649 B1 EP0363649 B1 EP 0363649B1
Authority
EP
European Patent Office
Prior art keywords
roller
feed duct
range
plane
fibre feed
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 - Lifetime
Application number
EP89116568A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0363649A1 (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
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 Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0363649A1 publication Critical patent/EP0363649A1/de
Application granted granted Critical
Publication of EP0363649B1 publication Critical patent/EP0363649B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

Definitions

  • the present invention relates to a friction spinning device.
  • Friction spinning devices are known in multiple copies from the patent literature. For example, there are arrangements with two cylindrical rollers, with rollers with concave surfaces, with rollers that are arranged one inside the other and rollers or tapered rollers that work with perforated belts or perforated disks. In most cases there are two bodies working together, at least one body being provided with a perforated suction surface.
  • the object of the present invention is to provide an uncomplicated friction spinning device which, with low energy consumption, is able to produce a high-quality yarn over a wide range of yarn sizes at high yarn take-off speeds, yarn breaks and yarn defects occurring relatively rarely during manufacture.
  • Fig. 1 shows a hint of a known opening roller 1, which is mounted and driven in a manner known per se in a housing 2 (also only partially shown).
  • the purpose of the opening roller is to dissolve a sliver inserted into the housing 2 into individual fibers 3, and for this purpose it is provided with needles 4.
  • a fiber feed channel 5 adjoins the housing 2 and opens out close to the cylindrical surface of a perforated roller 6. As shown in FIG. 2, the friction spinning device also has an unperforated roller 19.
  • the perforated roller 6 has on the inside a suction nozzle or a suction channel (FIG. 2) which, with its longitudinal edges 8 and 9, adjoins a suction zone R on the circumference of the perforated roller 6.
  • the walls 8 and 9 extend so close to the cylindrical inner wall of the perforated roller 6 that, without touching the inner wall 10, an inflow of false air between the walls 8 and 9 and the inner wall 10 is practically prevented.
  • This air which is sucked in by the suction channel 7 and also flows through the fiber feed channel 5, causes the fibers 3 detached from the needles 4 and exposed in the fiber feed channel 5 within said suction zone R at a surface area Q of the rotating friction spinning drum 6 delimited by the mouth 11 of the fiber feed channel 5 held and ultimately screwed to a yarn formation point 13 to a yarn 12. It is essential that the mouth 11 of the fiber feed channel lies in the suction area of the suction nozzle or the screen formed by the edges 8, 9.
  • the yarn formation point 13 is located in the region of an imaginary continuation of the wall 9 of the suction channel 7 through the cylindrical wall of the perforated roller 6, i.e. in the boundary area given by the wall 9 within the suction zone R.
  • the yarn formation point appears as a rotating hollow tube consisting of fibers, with a relatively loose composition, in the interior of which the actual yarn end is formed.
  • the perforated roller 6 rotates in the direction indicated by the arrow U and thereby transports the fibers released in the surface region Q to the perforated surface to the yarn formation point 13.
  • the finished yarn is drawn off in a draw-off direction a by a draw-off roller pair 14.
  • the length (not shown) of the suction zone R in the direction of the yarn formation point 13 corresponds at least to the length L of the mouth 11.
  • the length L and the clear width D3 result in a mouth with a slit-like shape.
  • FIG. 1 further shows the fiber feed channel 5 with an inclination marked with an acute angle ⁇ , which finally represents the angle which lies between the central longitudinal axis 20 of the fiber feed channel and the yarn withdrawal direction a.
  • this angle ⁇ is shown in the end wall 16 of the fiber feed channel, since in this example this end wall runs parallel to the longitudinal axis of the fiber feed channel.
  • the mouth 11 is provided essentially parallel and at a predetermined distance A from the yarn formation point 13.
  • the air flow in the channel also has an at least similar tendency to the mouth cross section.
  • Fig. 2 shows that the fiber feed channel in the mouth region has a strongly tapered part with the height M, which is tapered from the channel width D2 to the channel width D3.
  • this tapering takes place primarily by inclining the longitudinal side wall 21 of the fiber feed channel 5 that is on the right in FIG. 2.
  • the left one Side wall 23, on the other hand, runs at least substantially parallel to the plane of symmetry 22 between the perforated roller 6 and the non-perforated roller 19.
  • This type of taper has the particular advantage that the fibers are released through the inclined right longitudinal side wall 21 at least substantially tangentially to the surface area Q of the perforated roller 10, which is important according to the invention.
  • the fibers detached from the sliver by the needles 4 of the opening roller 1 are detected by the air flow Z passing the needles essentially tangentially to the opening roller 1 and conveyed further as free-floating fibers 3 in the fiber feed channel 5.
  • the air flow in the fiber feed channel is denoted by S.
  • This air flow S is accelerated in the tapered mouth region with the height M in accordance with the change in cross-section, which is given by the change in the inside width of the fiber feed channel 5 from D2 to D3, and is then taken up by the suction channel 7 through the perforated friction spinning drum 16.
  • the air flow S undergoes a deflection against the circumferential direction of the perforated friction spinning drum 6, as indicated by the curve S1 of the arrow S, so that the front part, viewed in the direction of flow, of a fiber 3 delivered in the direction of flow also in this acceleration zone deflected according to the air flow S, then caught by the perforated roller, which is shown with the fiber layer 3.1, and is withdrawn in the circumferential direction of the perforated roller 6.
  • the rear part of this fiber is conveyed further in the air flow in the direction of arrow N (FIG. 1), in order to ultimately reach the fiber layer in a 3.2 Surface of the perforated roller 6 to be released.
  • the size of the angle ⁇ (FIG.
  • the angle ⁇ is smaller as the angle ⁇ becomes smaller, provided that the ratio between air speed and peripheral speed is large, the height M is adapted to the inclination of the fiber feed channel and the acceleration in the said mouth area is sufficiently large to allow the said front end of the respective one Guide the fiber fast enough against the perforated roller.
  • the ratio between the air speed and the peripheral speed of the perforated roller must increase and the acceleration in the mouth region mentioned must be increased due to the small selected height M.
  • the speed of the conveying air in the mouth is at least 50% higher than the speed at the beginning of the range mentioned, i.e. at the channel width D2, must be to effect a sufficiently effective deflection of a front fiber end.
  • the tapered area in front of the mouth should only be so high that the front end of a fiber covered by this area is a maximum of a third of the length of a medium fiber to be processed.
  • the height M of this taper should therefore be selected at around 10 mm.
  • the speed of the conveying air in the mouth 11 should not be more than 5 times the speed in the channel width D2 at the beginning of this area.
  • the speed of the conveying air in the mouth 11 is advantageously between twice and four times the speed in the channel width D2.
  • the speed of the air flow above said tapered area is greater than the speed of movement of the surface of the perforated roller in order to avoid the fibers coming to lie substantially in the direction of movement of the perforated roller.
  • the speed of the conveying air flow above the tapered area must be greater as the angle of inclination ⁇ of the fiber feed channel 5 becomes smaller in order to bring the fiber into the fiber layer 3.2 with the desired angle ⁇ .
  • the air speed mentioned should be between 15 m / sec. and 100 m / sec. be.
  • the angle of inclination ⁇ of the fibers 3 in the fiber layer 3.2 is also reduced if the speed of the air flow mentioned above the tapered area increases while the speed of movement of the friction spinning means remains the same. At a minimum, the speed of the air flow mentioned must be twice the peripheral speed of the perforated roller.
  • FIG. 2 shows a number of further distances which, when correctly selected in combination with the measures considered above, lead to a favorable result.
  • This is the distance B between the lower longitudinal edge 9 of the suction channel 7 and the plane 24 connecting the two axes of rotation of the rollers, the distance C between the upper longitudinal edge 8 of the suction channel 7 and the same plane 24, the distance D between the perforated and the non-perforated roller in the narrowest gap 25 in the connecting plane 24, the radial distance E between the longitudinal side wall 21 of the fiber feed channel 5 and the perforated roller 6, the radial distance F between the non-perforated roller 19 and the left longitudinal side wall 23 of the fiber feed channel 5, and the height difference G between the left and right side walls 23, 21 of the fiber feed channel 5.
  • the selection of the two radial distances E and F is of particular importance.
  • the specified values of 0.2 mm to 0.7 mm represent an optimum, whereby even relatively small deviations lead to a noticeable deterioration in the negative pressure in the fiber feed channel and to the yarn strength.
  • the position of the mouth 11 with respect to the plane of symmetry 22 is absolutely uncritical.
  • FIG. 2 shows a symmetrical position, the mouth can be “shifted” to the left or to the right in FIG. 2 without this leading to changed yarn values , as long as the specified radial distances are maintained by shielding plates or a suitable thickness of the longitudinal side walls 21, 23 of the fiber feed channel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Braking Arrangements (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
EP89116568A 1988-09-21 1989-09-07 Friktionsspinnvorrichtung Expired - Lifetime EP0363649B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3832110A DE3832110A1 (de) 1988-09-21 1988-09-21 Friktionsspinnvorrichtung
DE3832110 1988-09-21

Publications (2)

Publication Number Publication Date
EP0363649A1 EP0363649A1 (de) 1990-04-18
EP0363649B1 true EP0363649B1 (de) 1994-11-30

Family

ID=6363440

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89116568A Expired - Lifetime EP0363649B1 (de) 1988-09-21 1989-09-07 Friktionsspinnvorrichtung

Country Status (6)

Country Link
US (1) US4938018A (ru)
EP (1) EP0363649B1 (ru)
JP (1) JPH02112422A (ru)
AT (1) ATE114743T1 (ru)
DE (2) DE3832110A1 (ru)
RU (1) RU1814666C (ru)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4223833A1 (de) * 1992-07-20 1994-01-27 Schlafhorst & Co W Verfahren und Vorrichtung zum Spinnen eines Garnes nach einem Friktionsspinnverfahren

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2714089C2 (de) * 1977-03-30 1986-07-31 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Vorrichtung zum Spinnen eines Fadens aus Einzelfasern
AT364292B (de) * 1980-03-17 1981-10-12 Fehrer Ernst Vorrichtung zum herstellen eines garnes
DE3114093C2 (de) * 1980-04-19 1986-06-05 Hollingsworth (U.K.) Ltd., Accrington, Lancashire Walze für eine Friktionsspinnvorrichtung
DE3308250A1 (de) * 1983-03-09 1984-09-13 Stahlecker, Fritz, 7347 Bad Überkingen Oe-friktionsspinnvorrichtung
AT385283B (de) * 1983-07-13 1988-03-10 Fehrer Textilmasch Vorrichtung zum herstellen eines garnes
GB8421439D0 (en) * 1984-08-23 1984-09-26 Manchester Inst Science Tech Production of yarns
IN165403B (ru) * 1984-09-25 1989-10-07 Rieter Ag Maschf
DE3441492A1 (de) * 1984-11-13 1986-05-22 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt Offenend-spinnvorrichtung
DE3441493A1 (de) * 1984-11-13 1986-05-15 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt Offenend-spinnvorrichtung
GB2168390B (en) * 1984-12-18 1988-02-03 Hollingsworth Uk Ltd Friction spinning apparatus
DE3521665A1 (de) * 1985-06-18 1987-01-02 Rieter Ag Maschf Friktionsspinnmittel fuer eine friktionsspinn-vorrichtung
IN167316B (ru) * 1985-07-12 1990-10-06 Rieter Ag Maschf
IN171021B (ru) * 1987-04-27 1992-07-04 Rieter Ag Maschf

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
keine *

Also Published As

Publication number Publication date
ATE114743T1 (de) 1994-12-15
US4938018A (en) 1990-07-03
EP0363649A1 (de) 1990-04-18
RU1814666C (ru) 1993-05-07
JPH02112422A (ja) 1990-04-25
DE58908687D1 (de) 1995-01-12
DE3832110A1 (de) 1990-03-29

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