EP0208274A1 - Procédé et dispositif pour le filage de fil par une machine de filature à fibres libérées par friction - Google Patents

Procédé et dispositif pour le filage de fil par une machine de filature à fibres libérées par friction Download PDF

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Publication number
EP0208274A1
EP0208274A1 EP86109126A EP86109126A EP0208274A1 EP 0208274 A1 EP0208274 A1 EP 0208274A1 EP 86109126 A EP86109126 A EP 86109126A EP 86109126 A EP86109126 A EP 86109126A EP 0208274 A1 EP0208274 A1 EP 0208274A1
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EP
European Patent Office
Prior art keywords
mouth
speed
fiber
angle
conveying
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.)
Granted
Application number
EP86109126A
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German (de)
English (en)
Other versions
EP0208274B2 (fr
EP0208274B1 (fr
Inventor
Herbert Stalder
Josef Baumgartner
Arthur Würmli
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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Publication date
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Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0208274A1 publication Critical patent/EP0208274A1/fr
Application granted granted Critical
Publication of EP0208274B1 publication Critical patent/EP0208274B1/fr
Publication of EP0208274B2 publication Critical patent/EP0208274B2/fr
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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
    • D01H4/06—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
    • 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
    • D01H4/16—Friction spinning, i.e. the running surface being provided by a pair of closely spaced friction drums, e.g. at least one suction drum
    • D01H4/18—Friction drums, e.g. arrangement of suction holes
    • 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

  • the invention relates to a method and a device for spinning a yarn or the like, according to the open-end friction spinning principle, as in the preamble of the first method or. of the first device claim is defined.
  • the disadvantage of such obstacles is primarily the risk that at least temporarily larger fiber accumulations form at the obstacles, which can be conveyed as a whole and delivered to the end of the yarn, which leads to unusable nits in the yarn.
  • the other danger is the possibility of at least partial blockage of the delivery channel.
  • a further proposal to dispense the fibers in a stretched and as parallel as possible position in the gusset gap of two friction spinning drums is from the German patent application no. 3318924 known.
  • a slot-shaped fiber conveying channel has a bulge in the region of the mouth on the wall opposite the gusset gap, in order to give a possibility of being delivered in a stretched form after the front end thereof has been gripped in the gusset gap by the yarn end and pulled off in the opposite direction in a so-called spin-stretch movement, lay parallel to the end of the thread in a whip-like manner, in order then to be twisted into a thread.
  • the fiber feed channel is located in the essentially in a plane through the gusset gap and perpendicular to the axes of the rollers. Moreover, an acute angle and counter to the withdrawal direction of the yarn of the fiber conveying channel is inclined at an angle of about 30 0th
  • the disadvantage of this device is that the fibers, after they have been gripped in the stretched position with their front end by the yarn end, are deflected at a pull-off speed of the yarn that is relatively low in relation to the fiber conveying speed in the channel, so that the subsequent part of a fiber is only partially is deflected like a whip, while the remaining part of this fiber is compressed in the gusset gap.
  • the invention is therefore based on the object of delivering the fibers to the friction spinning agent in a substantially stretched position without the risk of clogging and compression.
  • the object is achieved by the features characterizing in the first method claim and in the first device claim.
  • Fig. 1 shows a hint of an opening roller 1 known from the rotor open-end spinning process, which is mounted in a manner known per se in a housing 2 (only partially shown) and can be driven.
  • the opening roller 1 is provided in a manner known per se (and therefore not described further) for opening a fiber sliver (not shown) into individual fibers 3, with needles 4 or teeth (not shown).
  • the housing 2 is connected to a fiber conveying channel 5 which opens close to the cylindrical surface of a perforated (see FIG. 5) friction spinning drum 6.
  • This friction spinning drum 6 has on the inside a suction channel 7 (FIG. 5) which, by means of its walls 8 and 9, delimits a suction zone R on the circumference of the friction spinning drum 6.
  • the walls 8 and 9 extend so close to the cylindrical inner wall 10 of the friction spinning drum 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 yarn formation point 13 is located in the area of an imaginary continuation of the wall 9 of the suction channel 7 through the cylindrical wall of the friction spinning drum 6, i.e. in the boundary area given by the wall 9 within the suction zone R.
  • the friction spinning drum 6 rotates in a direction indicated by the arrow U and thereby transports the fibers released in the surface area Q to the friction spinning drum 6 to the yarn formation point 13.
  • 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 14 can also be provided on the opposite end of the friction spinning drum 6, which is shown with the dot-and-dash roller pair 14.1, i.e. that the yarn can also be drawn off in direction B.
  • the length (not shown) of the suction zone R corresponds at least to the length L (FIG. 2) of the mouth 11.
  • the length L and the inside width D.3 (FIGS. 2, 4 and 5) the mouth 11 give the mouth cross-section, whereby basic Lich the cross-section of the mouth of the outlet cross-section of the fiber conveying channel is to be understood.
  • Fig. 1 further shows the fiber feed channel 5 with an inclination marked with an acute angle d.
  • the angle of inclination ⁇ is formed by an imaginary extension of the mouth 11 and a lower wall 16 (as viewed in FIG. 1) of the channel 5.
  • the mouth 11 is provided substantially 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 inclination to the mouth cross section.
  • FIG. 1 shows that the fiber conveying channel in the mouth region has a strongly tapered part with the height M, which, as shown in FIGS. 2 and 5, tapers from the channel width D.2 to the channel width D.3.
  • the preceding part of the fiber conveyor channel 5 is also, but significantly less, tapered, which is shown with the channel width D.1 to width D.2 in FIG. 2.
  • the fibers detached from the needles 4 of the opening roller 1 from the sliver are detected by the air flow Z, which will pass the needles later substantially and tangentially to the opening roller 1, and conveyed further as free-flying 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, corresponding to the change in cross-section, given by the change in the inside width of the fiber conveying channel 5 from D.2 to D.3, and then taken up by the suction channel 7 through the perforated friction spinning drum 6.
  • the air flow S is deflected towards the surface of the perforated friction spinning drum 6, as is indicated by the bow S.1 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 therein Acceleration zone also deflected according to the air flow S, then captured by the friction spinning drum, which is shown with the fiber layer 3.1, and is pulled off in the circumferential direction of the friction spinning drum 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 be finally released to the surface of the friction spinning drum 6 in a fiber layer marked 3.2.
  • the size of the angle ⁇ (FIG.
  • the angle r is smaller, when the angle ⁇ becomes smaller, provided that the ratio between air speed and circumferential speed mentioned speed of the Fritationsspinntrommel 6 is sufficiently large, the amount M adapted to the inclination of the fiber conveying channel and the overall acceleration opening region in said n ügend is large, in order to deflect said forward end of the respective fiber sufficiently rapidly against the Fritationsspinntrommelober configuration.
  • the angle ⁇ becomes smaller, the ratio between the air speed and the peripheral speed of the friction spinning drum has to be greater and the acceleration in the mouth region mentioned has to be increased due to the smaller 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. must be D.2 in order to achieve a sufficiently effective deflection of a front fiber end.
  • the tapered area in front of the mouth should not be higher than that the front end of a fiber covered by this area is a maximum of a third of the length of a middle fiber to be processed.
  • the height M of this taper is therefore to be chosen between 5 and 15 millimeters.
  • the speed of the conveying air in the mouth 11 should not be more than five times the speed in the channel width D.2, ie at the beginning of this area.
  • the speed of the conveying air in the mouth 11 is advantageously between double and that Four times the speed in the channel width D.2.
  • the speed of the air flow above the said tapered area is greater than the speed of movement of the friction spinning means in order to avoid that fibers essentially in the direction of movement of the friction spinning means, i.e. with a friction spinning drum in the circumferential direction and with a friction spinning disc in the direction of rotation.
  • the speed of the conveying air flow above the tapered area with decreasing angle of inclination ⁇ of the conveying channel 5, respectively. 5.1 must be larger in order to bring the fiber into the fiber layer 3.2 with the desired angle r.
  • 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 becomes greater while the speed of movement of the friction spinning means remains the same. At a minimum, the air flow mentioned must be twice as high as the speed of movement of the friction spin material.
  • the angle 8 which characterizes the tapering of the area mentioned is to be chosen between 20 and 50 degrees, preferably between 30 and 40 degrees len in order to obtain the desired fiber deposition effect without excessive flow losses.
  • the arrangement of the holes 52 resulting in the perforation of the surface of the friction spinning means - in this case the friction spinning drum 6 - should be selected such that those connecting lines 50 and 50, respectively. 51 of the hole centers, which assume a position inclined at angles P.1 and ⁇ .2 to the yarn formation point 13, form an acute angle.
  • the larger angle ⁇ .2 should be not smaller than 5 0 no greater than 80, and the small angle ⁇ .1.
  • the small angle ⁇ .1 should preferably be selected between 10 and 30 °, since most fibers attach to these fiber position angles r.
  • the connecting lines 50, respectively. 51 compared to the delivery channel 5 respectively. 5.1 provided opposite to the yarn formation point 13 inclined.
  • the rows of holes are correspondingly arranged such that the straight lines (50, 51) connecting the center of the holes are neither provided parallel to the yarn formation point 13 nor at a right angle thereto.
  • the friction spinning device of FIGS. 3 and 4 differs from that of FIGS. 1 and 2 essentially by the position of the opening roller 1 relative to the position of the mouth 11, and by the substantially parallel course of the channel walls delimiting the channel widths D1 and D.2 18 and 19 of the fiber feed channel 5.1. Accordingly, the elements having the same functions as those of the device of Figs. 1 and 2 are given the same reference numerals.
  • the fiber conveying channel 5.1 of the device in FIGS. 3 and 4 has in principle the same function as the fiber conveying channel 5 of the device in FIGS. 1 and 2, but is marked 5.1 because the walls 18 and 19 run essentially parallel.
  • the channel width D.1 corresponds to the width (not shown) of the opening roller 1
  • the channel width D.1 of the fiber feed channel 5.1 of the device of FIGS. 3 and 4 is selected independently of the width of the opening roller 1 can be, since in this variant the width mentioned gives the width T of the conveyor channel 5.1.
  • FIGS. 7 and 8 show the application of the invention in a friction spinning device as seen from the closely Lischen patent specification No. 1231198 is known ago.
  • 1 and 2 there is a friction spinning disc 30 and instead of a friction spinning drum 15, which rotates in a manner known per se as a counter drum to the perforated drum 6 in the same direction of rotation, a conical counter-roller 31.
  • the disc 30 is in perforated in a manner analogous to the drum 6 (only indicated in FIGS. 7 and 8) and rotates in the direction F by means of an associated shaft 33 in order to deliver the fibers 3 of the yarn formation point 13 (FIG. 8) delivered in the fiber conveying channel 5 or 5.1, in which they are twisted into yarn 12.
  • the distance al between the mouth 11 and the yarn formation point 13 corresponds to the mean distance.
  • a suction channel 32 the suction opening of which is shown in broken lines in FIG. 8, has the same function as the previously mentioned suction channel 7.
  • the fiber feed channel can be provided either in the manner shown in FIGS. 1 and 2 or in the manner shown in FIGS. 3 and 4.
  • the holes 52 which result in the perforation are also arranged here in such a way that at least two of the straight lines connecting the rows of holes form an acute angle with the yarn formation point 13. That Gera are with the reference numerals 53 and 54 and the associated angles with 6 . 1 resp. 6.2 marked. It goes without saying that since it is a friction spinning disc and not a friction spinning drum, the hole arrangement must be provided in segments, as shown in FIG. 10.
  • the air flow Z mentioned earlier is guided in an air inlet duct 100 that runs tangentially to the opening roller 1. As shown in FIG. 1, this air inlet duct 100 opens straight into the fiber feed duct 5. However, it is also possible to provide this air inlet duct in a shape angled to the fiber feed duct 5; it is essential that this duct is designed in such a way that the air flow Z in able to take over the fibers from the opening roller 1 and transfer them to the fiber feed channel.
  • the provision of the aforementioned air inlet duct 100 is not restricted to use in a device according to FIG. 1, but is possible in an analogous manner in all of the fiber conveying ducts shown.
  • the advantage of such an air inlet duct 100 and thus of an air flow Z is the possibility in a simple manner of the amount of air required for the conveying speed of the fibers in the fiber conveying duct hold, as well as the fact that the air flowing past the opening roller 1 can be provided at a speed which is at least equal to or greater than the peripheral speed of the outermost diameter of the opening roller, so that the air flow Z has a stretching effect on the fibers to be taken over by the opening roller exercises.
  • the fibers supplied to the acceleration zone in the mouth region have already been stretched, so that essentially stretched fibers can be added to the fiber layer 3.2.
  • the air flow S can experience a further acceleration between the opening roller and the acceleration area in the mouth, so that the fibers guided in the fiber conveyor channel also have a higher speed at their front end, as seen in the conveying direction experience the ambient air as its rear part, which also contributes to further stretching or at least to prevent curling of the fibers.
  • the air speed in the fiber feed channel can be selected such that a desired dilution of the fiber flow in the fiber feed channel can be achieved, which is useful for the "rollover" of the fiber mentioned earlier, because this rollover effect becomes more effective with a decreasing number of fibers in the fiber flow cross section.
  • the amount of air is changed by changing the cross section of the air inlet duct 100 and / or by changing the negative pressure in the fiber feed channel 5, respectively. 5.1 changed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP86109126A 1985-07-12 1986-07-04 Procédé et dispositif pour le filage de fil par une machine de filature à fibres libérées par friction Expired - Lifetime EP0208274B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3021/85 1985-07-12
CH302185 1985-07-12

Publications (3)

Publication Number Publication Date
EP0208274A1 true EP0208274A1 (fr) 1987-01-14
EP0208274B1 EP0208274B1 (fr) 1988-12-28
EP0208274B2 EP0208274B2 (fr) 1992-02-05

Family

ID=4246852

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86109126A Expired - Lifetime EP0208274B2 (fr) 1985-07-12 1986-07-04 Procédé et dispositif pour le filage de fil par une machine de filature à fibres libérées par friction

Country Status (5)

Country Link
US (1) US4640089A (fr)
EP (1) EP0208274B2 (fr)
JP (1) JPS6215332A (fr)
DE (1) DE3661549D1 (fr)
IN (1) IN167316B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2635339A1 (fr) * 1988-08-09 1990-02-16 Laval Patrice Procede de filature du type a bouts liberes, et dispositif pour mettre en oeuvre ce procede
DE3832110A1 (de) * 1988-09-21 1990-03-29 Rieter Ag Maschf Friktionsspinnvorrichtung
WO1990005802A1 (fr) * 1988-11-23 1990-05-31 National Research Development Corporation Procede de filage de fils
CH681729A5 (fr) * 1990-07-13 1993-05-14 Rieter Ag Maschf

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3629498A1 (de) * 1986-08-29 1988-03-10 Brockmanns Karl Josef Dr Ing Friktionsspinnvorrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1231198A (fr) * 1967-09-11 1971-05-12
DE3300636A1 (de) * 1983-01-11 1984-07-12 Fritz 7347 Bad Überkingen Stahlecker Oe-friktionsspinnvorrichtung
DE3318924A1 (de) * 1983-05-25 1984-11-29 Fritz 7347 Bad Überkingen Stahlecker Vorrichtung zum oe-friktionsspinnen
DE3324001A1 (de) * 1983-07-02 1985-01-03 Fritz 7347 Bad Überkingen Stahlecker Vorrichtung zum oe-friktionsspinnen
DE3323189A1 (de) * 1983-06-28 1985-01-10 Fritz 7347 Bad Überkingen Stahlecker Vorrichtung zum oe-friktionspinnen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT339779B (de) * 1976-04-08 1977-11-10 Fehrer Ernst Gmbh Vorrichtung zum spinnen textiler fasern
ATA170978A (de) * 1977-03-30 1990-09-15 Schlafhorst & Co W Verfahren und vorrichtung zum spinnen eines fadens aus einzelfasern
DE3323988A1 (de) * 1983-07-02 1985-01-03 Fritz 7347 Bad Überkingen Stahlecker Vorrichtung zum oe-friktionsspinnen
DE3335065A1 (de) * 1983-09-28 1985-04-04 Stahlecker, Fritz, 7347 Bad Überkingen Vorrichtung zum oe-friktionsspinnen
DE3336547A1 (de) * 1983-10-07 1985-04-18 Fritz 7347 Bad Überkingen Stahlecker Vorrichtung zum oe-friktionsspinnen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1231198A (fr) * 1967-09-11 1971-05-12
DE3300636A1 (de) * 1983-01-11 1984-07-12 Fritz 7347 Bad Überkingen Stahlecker Oe-friktionsspinnvorrichtung
DE3318924A1 (de) * 1983-05-25 1984-11-29 Fritz 7347 Bad Überkingen Stahlecker Vorrichtung zum oe-friktionsspinnen
DE3323189A1 (de) * 1983-06-28 1985-01-10 Fritz 7347 Bad Überkingen Stahlecker Vorrichtung zum oe-friktionspinnen
DE3324001A1 (de) * 1983-07-02 1985-01-03 Fritz 7347 Bad Überkingen Stahlecker Vorrichtung zum oe-friktionsspinnen

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2635339A1 (fr) * 1988-08-09 1990-02-16 Laval Patrice Procede de filature du type a bouts liberes, et dispositif pour mettre en oeuvre ce procede
WO1990001575A1 (fr) * 1988-08-09 1990-02-22 Maschinenfabrik Rieter Ag Procede de filature du type a bouts liberes, et dispositif pour mettre en ×uvre ce procede
DE3832110A1 (de) * 1988-09-21 1990-03-29 Rieter Ag Maschf Friktionsspinnvorrichtung
US4938018A (en) * 1988-09-21 1990-07-03 Rieter Machine Workds, Ltd. Friction spinning machine
WO1990005802A1 (fr) * 1988-11-23 1990-05-31 National Research Development Corporation Procede de filage de fils
GB2226576A (en) * 1988-11-23 1990-07-04 Nat Res Dev Open-end spinning
GB2226576B (en) * 1988-11-23 1993-04-28 Nat Res Dev Spinning of yarn
US5497609A (en) * 1988-11-23 1996-03-12 British Technology Group Ltd. Spinning of yarn
CH681729A5 (fr) * 1990-07-13 1993-05-14 Rieter Ag Maschf

Also Published As

Publication number Publication date
DE3661549D1 (en) 1989-02-02
EP0208274B2 (fr) 1992-02-05
EP0208274B1 (fr) 1988-12-28
IN167316B (fr) 1990-10-06
US4640089A (en) 1987-02-03
JPS6215332A (ja) 1987-01-23
JPH0235046B2 (fr) 1990-08-08

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