EP0227220A2 - Einrichtung zum Friktionsspinnen - Google Patents

Einrichtung zum Friktionsspinnen Download PDF

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Publication number
EP0227220A2
EP0227220A2 EP86307522A EP86307522A EP0227220A2 EP 0227220 A2 EP0227220 A2 EP 0227220A2 EP 86307522 A EP86307522 A EP 86307522A EP 86307522 A EP86307522 A EP 86307522A EP 0227220 A2 EP0227220 A2 EP 0227220A2
Authority
EP
European Patent Office
Prior art keywords
roller
friction spinning
air
shroud
nip
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
EP86307522A
Other languages
English (en)
French (fr)
Other versions
EP0227220A3 (en
EP0227220B1 (de
Inventor
Douglas Owen Clough
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.)
Hollingsworth UK Ltd
Original Assignee
Hollingsworth UK Ltd
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
Priority claimed from GB858528844A external-priority patent/GB8528844D0/en
Priority claimed from GB858528845A external-priority patent/GB8528845D0/en
Application filed by Hollingsworth UK Ltd filed Critical Hollingsworth UK Ltd
Priority to AT86307522T priority Critical patent/ATE52284T1/de
Publication of EP0227220A2 publication Critical patent/EP0227220A2/de
Publication of EP0227220A3 publication Critical patent/EP0227220A3/en
Application granted granted Critical
Publication of EP0227220B1 publication Critical patent/EP0227220B1/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
    • D01H4/22—Cleaning of running surfaces
    • D01H4/26—Cleaning of running surfaces in friction spinning

Definitions

  • the present invention relates to a friction spinning apparatus comprising two parallel, closely arranged cylindrical rollers defining a spinning nip into which fibres are introduced to be rolled up to form a yarn.
  • the conventional friction spinning apparatus of such a type has a suction slot within one or both of the spinning rollers, providing localised suction so as to concentrate the fibres at the nip.
  • some fibres may escape this suction effect and, because of the local­isation of the suction, may then be able to lodge in other parts of the friction spinning unit.
  • one time when fibres may well cause difficulties in the frict­ion spinning unit is after a yarn break when the slub resulting from a short over feed of fibres following the breaking of the yarn results in the fact that these fibres are unable to be removed from the spinning nip and become rolled up to form a slub which needs to be removed before the yarn can be re-pieced.
  • one aspect of the present invention provides a friction spinning apparatus including a pair of parallel adjacently arranged rollers drivable in the same sense and defining a spinning nip, means for feeding fibers to said spinning nip, characterized by an airflow-­confining shroud closely surrounding a part of the cylindrical surface of one of said rollers, and by an air discharge nozzle for discharging air at the periphery at said one of said friction spinning rollers for urging unwanted fibres along the nip towards one end thereof.
  • one (1) of the rollers is forami­nous and the other is imperforate.
  • the principles of the invention could if desired be applied to a friction spinning unit having both of the rollers foraminous.
  • the foraminous roller 1 comprises an inner sleeve 2 defining a suction slot within a foraminous outer sleeve 3, so that the slot in the inner sleeve 2 localises the suction to the nip.
  • a further sleeve 4 includes a parallelogram-­shaped slot which is used during piecing, as disclosed in our EP-A-0 052 412.
  • the foraminous outer sleeve 3 rotates at high speed by virtue of the end bearings 5 and 6 and by virtue of the tangential belt drive 12 riding on the periphery of the sleeve 3, while the slotted inner sleeves 2 and 4 are stationary.
  • the position of the slot in the sleeve 2 can if desired be adjusted, for example for the purposes of tun­ing the friction spinning unit for a particular staple fibre material being spun; the inner-most sleeve 4 is rotated only during the shut-down and piecing operations.
  • a further sleeve 7 serving as a shroud of the perforated roller and spaced from the sleeve 3 to define therewith a narrow passage extending circumferentially around the foraminous roller assembly 1.
  • an air jet nozzle 8 position­ed alongside the holding plate 9 for the shroud 7.
  • the shroud 7 is held by a grub screw 18.
  • the nozzle 8 projects air into the annular passage between the shroud 7 and the foraminous outer sleeve 3, with a component of movement along the foraminous roller assembly 1.
  • the movement of the air from the nozzle 8 is helically around the axis of the foraminous roller assembly 1, but in such a way that the airflow is directed in a clockwise sense around the for­aminous roller assembly 1 as viewed in Figure 2 and hence the effect of the air jet is to blow the fibrous slub, which may remain in the friction spinning unit upon shut-­down, in a direction axially along the spinning nip.
  • the air jet can be activated to clear the chamber, and the strength of the air jet re­leased from nozzle 8 can be sufficient to expel the slub along the nip even while suction to the interior of the slotted sleeves 2 and 4 is applied.
  • the suction it is alter­natively possible for the suction to be switched off during pneumatic cleaning by the nozzle 8.
  • the two friction spinning rollers 1 and 10 there may be a receptacle (not shown) to receive the fibrous slub released by the jet issuing from the nozzle 8 during the cleaning operation.
  • the slub may be allowed to be discharged forwardly of the apparatus when the unit is opened.
  • the friction spinning unit illust­rated in Figures 1 and 2 will be as disclosed in our EP-A-0 052 412 in that the imperforate roller 10 is lifted clear of the fibre feed duct 11 and the foraminous roller assembly 1 when the spinning unit is opened for cleaning and re-piecing.
  • the operation of the air jet at the time will be capable of expelling the fibrous slub clear of the friction spinning rollers if no separate slub receptacle is required.
  • Any such slub receptacle may of course be subject to vacuum as disclosed in out EP-A-0179644.
  • Figure 2 also shows the imperforate friction spinning roller 10 and the fibre feed duct 11 which feeds staple fibres to the nip for spinning purposes.
  • the operation of the air jet 8 also serves to provide a pneumatic barrier preventing stray fibres from entering the space between the shroud 7 and the foraminous outer sleeve 3 during cleaning.
  • the nozzle 8 is switched to discharge an air jet during the cleaning operation of the friction spinning unit, for example as the spinning unit is opened in the case of a manually cleaned unit.
  • the shroud is within 0.02" (0.51 mm) from the roller 1.
  • This embodiment of spinning unit is one in which the two friction spinning rollers are open to atmosphere.
  • FIG. 2 shows that the shroud 7 extends around the major part of the foraminous roller assembly but is open at the front (underside) and the rear (top side) of the nip between the rollers 1 and 10.
  • the fibre feed duct 14 butts up against an axially extending external face of the shroud 7 which is smoothly radiused at 17 and hence serves as a continuation of the shroud up to the spinning nip between the solid roller 10 and the perforated roller 1.
  • a "nose" member 15 above the two rollers 1 and 10 which lifts away when the spinning unit is opened for cleaning purposes, as disclosed in our EP-A-0 052 412, and this again serves as a continuation of the shroud 7, but with a working clearance to allow the "nose” 15 to move into and out of position as the spinning unit cover 16 is opened and closed.
  • the concave arcuate extension formed by the smoothly radiused part 17 of the fibre feed duct 14 and a tangenti­al extension formed by the "nose” 15 provide for well in excess of 300° of arc of the periphery of the perforated roller to be shrouded.
  • the "nose” 15 crosses the common tangent plane C-C bisecting the spinning nip, so that the nose 15 deflects fly and short fibres towards the first or perforated roller 1 if they are able to pass through the nip.
  • the "nose" 15 In order further to enhance the guiding action of the "nose" 15, it extends back in towards the nip over a considerable proportion of the spacing between the plane A-A containing the axes of rotation of the first and second rollers 1 and 2 and the parallel common tangential plane of those two rollers making the path of the belt 12. In practice the nose 15 extends through substantially half of that spacing, and is thereby able to be contacted by any stray fly and short fibre very soon after is has passed through the nip.
  • the left hand end of the perforated roller assembly 1 shown in Figure 1 may be provided with some type of self-pumping formation in order to generate an airflow away from the bearing 4.
  • the hollow cylindrical body 2 may be provided with apertures at each end near the bearings 4 and 17, for a purpose explained in our British Patent Application No.8523761.
  • the shroud 7 may, for example, be formed of aluminium with a highly polished radially inner surface. It may also be desirable to treat the radially inner surface in some other way to enhance its abrasion resist­ance. For example the inner surface may be anodized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP19860307522 1985-11-22 1986-10-01 Einrichtung zum Friktionsspinnen Expired - Lifetime EP0227220B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86307522T ATE52284T1 (de) 1985-11-22 1986-10-01 Einrichtung zum friktionsspinnen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB8528845 1985-11-22
GB858528844A GB8528844D0 (en) 1985-11-22 1985-11-22 Friction spinning unit
GB858528845A GB8528845D0 (en) 1985-11-22 1985-11-22 Friction spinning apparatus
GB8528844 1985-11-22

Publications (3)

Publication Number Publication Date
EP0227220A2 true EP0227220A2 (de) 1987-07-01
EP0227220A3 EP0227220A3 (en) 1987-11-25
EP0227220B1 EP0227220B1 (de) 1990-04-25

Family

ID=26290035

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860307522 Expired - Lifetime EP0227220B1 (de) 1985-11-22 1986-10-01 Einrichtung zum Friktionsspinnen

Country Status (4)

Country Link
EP (1) EP0227220B1 (de)
DE (1) DE3670655D1 (de)
ES (1) ES2015532B3 (de)
GB (1) GB2183259B (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3308247A1 (de) * 1983-03-09 1984-09-13 Fritz 7347 Bad Überkingen Stahlecker Oe-friktionsspinnmaschine
DE3343762A1 (de) * 1983-12-03 1985-06-13 Fritz 7347 Bad Überkingen Stahlecker Oe-friktionsspinnmaschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2042599B (en) * 1978-10-26 1983-09-21 Platt Saco Lowell Ltd Open-end spinning apparatus
DE3317361C2 (de) * 1983-05-13 1994-03-17 Schlafhorst & Co W Verfahren und Vorrichtung zur Inbetriebnahme eines Friktionsspinnaggregates
DE3317369A1 (de) * 1983-05-13 1984-11-15 W. Schlafhorst & Co, 4050 Mönchengladbach Verfahren und vorrichtung zur inbetriebnahme einer friktionsspinnmaschine
CH663428A5 (de) * 1983-05-21 1987-12-15 Schlafhorst & Co W Verfahren und vorrichtung zur inbetriebnahme einer friktionsspinnmaschine.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3308247A1 (de) * 1983-03-09 1984-09-13 Fritz 7347 Bad Überkingen Stahlecker Oe-friktionsspinnmaschine
DE3343762A1 (de) * 1983-12-03 1985-06-13 Fritz 7347 Bad Überkingen Stahlecker Oe-friktionsspinnmaschine

Also Published As

Publication number Publication date
EP0227220A3 (en) 1987-11-25
GB8622869D0 (en) 1986-10-29
GB2183259A (en) 1987-06-03
EP0227220B1 (de) 1990-04-25
GB2183259B (en) 1988-11-16
DE3670655D1 (de) 1990-05-31
ES2015532B3 (es) 1990-09-01

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