US3739565A - Method and apparatus for cleaning the spinning rotors of open-end spinning equipment - Google Patents

Method and apparatus for cleaning the spinning rotors of open-end spinning equipment Download PDF

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Publication number
US3739565A
US3739565A US00220325A US3739565DA US3739565A US 3739565 A US3739565 A US 3739565A US 00220325 A US00220325 A US 00220325A US 3739565D A US3739565D A US 3739565DA US 3739565 A US3739565 A US 3739565A
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Prior art keywords
spinning
rotor
spinning rotor
air
fibers
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US00220325A
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English (en)
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E Nagel
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Luwa Ltd
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Luwa Ltd
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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
    • D01H4/22—Cleaning of running surfaces
    • D01H4/24—Cleaning of running surfaces in rotor spinning

Definitions

  • Fibers are detached from the wall of the spinning rotor by virtue of 7 l5 U S Cl 57/58 5 g z g the reverse flow of such an current, the fibers placed [58] Field of Search i 5 58 89 in a state of suspension and then removed, preferably 25 by suction, from the spinning rotor.
  • the present invention relates to a new and improved method of, and apparatus for, cleaning the spinning rotors or turbines of open-end spinning equipment.
  • a primary objective of the present invention is directed at cleaning such spinning rotors of open-end spinning equipment in a man ner satisfactorily fulfilling the existing need in the art and not associated with the aforementioned drawbacks and limitations of the state-of-the-art techniques and apparatus constructions.
  • Yet a further significant object of the present invention relates to a novel method of, and apparatus for, effectively, reliably and efficiently cleaning the spinning rotors of open-end spinning equipment.
  • the complete engagement and removal of the fibers which remain upon interruption of the spinning operation is achieved in that, the spinning air current which originally also served to infeed or deliver the fibers is reversed in direction while maintaining as greatly as possible conformity in its flow path and consequently the transport of fibers is again, so to speak, rearwardly rolled-up.
  • the most favorable conditions are provided for ensuring that all unde sired fibers are again engaged, in other words that there is carried out a sufficient cleaning action, since the fibers have continuously been located at such flow paths and never externally thereof.
  • this inventive method can significantly be practiced with as few as possible additional means or devices and, therefore, from the standpoint of economy, servicing and maintenance requirements is extremely advantageous.
  • the inventive apparatus comprises a spinning rotor having air throughpassage openings, the spinning rotor being arranged in a housing.
  • a fiber infeed or delivery channel as well as a yarn withdrawal tube or conduit.
  • means are provided for the purpose of reversing the flow of air through the spinning rotor.
  • the flow through the spinning rotor is reversed, but with the same direction of rotor rotation.
  • the spinning rotor can be braked without requiring additional brake mechanisms.
  • the kinetic energy of the rotating spinning rotor is thus reclaimed and employed for flushing and cleaning the fiber collecting surfaces.
  • An additional expenditure of energy for obtaining a suction action is at most limited to taking-over the flushing flow which, so to speak, is delivered free by the spinning rotor and the removal thereof into a suitable collecting container or the direct uniting thereof with the spinningand/or cooling air current present in any case at machines equipped with spinning rotor units.
  • filtering-out the fiber material is undertaken centrally for each machine or in fact centrally for each group of machines.
  • FIG. 1 is a schematic illustration of a preferred constructional form of open-end spinning equipment using a spinning rotor
  • FIG. 2 is a fragmentary sectional view taken through a spinning rotor with air conveying elements constructed as blades or buckets and with an associated blade regulating or adjustment mechanism;
  • FIG. 3 is a side view of a spinning rotor with its air conveying elements in the form of buckets, viewed substantially along the line llIIll of FIG. 2;
  • FIG. 4 is a sectional view taken at right angles to the lengthwise axis of the spinning rotor of FIG. 2, with an arrangement of the blade structure for regulating the desired quantity of air flow;
  • FIG. 5 is an axial sectional view through a spinning rotor employing a second construction of air conveying elements
  • FIG. 6 is a sectional view taken perpendicular to the lengthwise axis of a spinning rotor having two groups of air throughpassage openings and employing a further construction of adjustment mechanism for the air conveying elements.
  • FIG. 1 there is illustrated by way of example a preferred constructional form of inventive open-end spinning equipment comprising a housing 2 containing a spinning rotor or turbine 4, the spinning rotor 4 embodying a driven rotating rotor component 6 and a yarn removal or withdrawal component 8.
  • the rotating rotor component 6 is supported by means of its shaft 10 in a bearing arrangement l2.
  • Shaft 10 possesses a hollow construction and communicates in air flow relationship the interior 52 of the spinning rotor 10 via a support 14 with a suction conduit or line 16.
  • a controllable slide valve unit 18 is arranged at the mouth of the support 14.
  • a fiber delivery or infeed conduit 20 piercingly extends through the housing 2 and serves to conduct the spinning fibers delivered from a suitable fiber separation mechanism 24 into the rotating component 6 of the spinning rotor 4.
  • the separation mechanism 24, dey livering the schematically depicted fiber arrangement or structure 26, embodies in known manner a delivery or feed cylinder 28 and an output or combing cylinder 30.
  • the yarn 32 formed in the spinning rotor 4 is withdrawn from the yarn removal or withdrawal component 8 by means of withdrawal cylinders 34.
  • the yarn 32 is then wound onto a spool 36 or the like.
  • throughflow openings 38 are arranged at the rotor wall at a regular spacing from one another and at the same diameter of such rotor.
  • the air freed of fibers can be removed from the interior 52 of the spinning rotor 4 by means of these throughflow openings 38.
  • air conveying devices here in the form of buckets or blades 40.
  • these blades or buckets 40 can be regulated by means of an adjustment mechanism 42 in such a manner that the conveying direction of the rotor 4 with the same direction of rotation can be reversed.
  • the course of the finished spun yarn 32 is monitored by a yarn feeler 44 which responds to eventual yarn ruptures.
  • the yarn feeler 44 triggers an electrical signal which can be delivered by a line 46 to a suitable signal evaluation device 48.
  • This evaluation device 48 is electrically connected on the one hand with the yarn separation mechanism 24 and, on the other hand, with the adjustment mechanism 42 for the rotor blades or buckets 40, and furthermore with the slide valve 18 of the suction line 16 and as not illustrated with a release or trigger mechanism for interrupting the drive of the unit at which the yarn rupture has occurred, such as the drive 150 schematically depicted in FIG. 1.
  • the spinning rotor 4' illustrated in FIG. 2 will be seen to comprise a protruding annular or ring-shaped channel 50 which is separated from the interior compartment or internal space 52 of the rotor 4 by an air permeable yet not fiber permeable filter-54.
  • This filter or sieve 54 possesses a fiber deposit trough 56.
  • Bores 38' distributively arranged at a regular spacing from one another over the entire periphery of the rotor 4' are provided at the base surface of the annular channel 50.
  • a respective cage 60 is mounted in these bores 38, which cage is rotatable about an axis 62 parallel to the rotor axis 64.
  • Each cage 60 possesses a cylindrical component 66 which is mounted in the bore 38.
  • Two side flaps 68 which extend parallel to one another and in the direction of the axis 62 merge with the cylindrical component or portion 66, as shown.
  • a rotor blade 40 which can not only be simply curved as illustrated in FIGS. 2 and 3, rather also spatially curved, is pivotably mounted by means of a pin 70, the axis of which extends perpendicular to the rotational axis 62 of the associated rotor bucket or blade 40.
  • the pin 70 extends laterally from the rotor blade 40 and at the side facing the ring-shaped orannular channel 50 possesses a lengthwise extending notch or groove 72 in which there is fixed one end of a blade spring 74.
  • this blade spring 74 is guided in a protruding nose member 76 of one of the side flaps or walls 68, and wherein the spacing between nose member 76 and the notch 72 is chosen such that the blade spring 74 is slightly arched or domed, as shown.
  • a pin member 80 extends parallel to the axis of the pin 70 from the rotor blade 40' towards the outside in the direction of and at the region of a switching ring 82 displaceably mounted at the wall of the housing 2 containing the spinning rotor 4.
  • the pin member 80 is not in contact with the switching ring 82 in both terminal positions of such switching ring.
  • the switching ring 82 is operatively connected in driving relationship, through the agency of a lever member 84, with a blade switching or reversing device 86 which is operatively connected via the evaluation device 48 with the yarn feeler 44.
  • the fiber structure or arrangement 26 which is delivered to the separation mechanism 24 is broken up into individual fibers and by means of the fiber transport or conveying air is delivered through the fiber delivery or infeed conduit 20 to the rotor 4 or 4' respectively, spun together, and leaves in the form of a yarn 32 at the yarn withdrawal conduit or tube, then to be wound up at the spool 28.
  • the yarn feeler 44 delivers a signal to the evaluation device 48 which causes the delivery of fiber to the separation mechanism 24 to be immediately interrupted and similarly ensures for the immediate interruption of the drive of the spinning rotor 4 or 4 respectively.
  • the interior 52 of the rotor 4 or 4' respectively is operatively connected with the suction conduit or line 16 by opening the slide valve 18 and the blade switching ring 82 is displaced by the blade switching device 86 into the position depicted in phantom lines (FIG. 2) which, in turn, causes pivoting of the buckets or blades 40' into the position depicted in phantom lines in FIG. 3 through the agency of the pin member 80. Consequently, the rotor 4' with the same sense of rotation conveys air out of the housing 2 into its interior 52, in other words in the opposite direction than prevailed during the spinning operation.
  • the air flow through the rotor 4 now extends completely and in flow line conformity in the opposite direction from the direction prevailing during the prior spinning operation and thus detaches the fibers which are still lying in the fiber trough 56 from the rotor wall and places such detached fibers, together with the fibers which are still arriving via the fiber delivery conduit, into a state of suspension, so that these fibers can arrive through the agency of the hollow shaft and the support 14 at the suction conduit or line 16 and at that location can be removed. Owing to the air conveying action in the opposite direction the rotor 4' is slowly braked and brought to standstill.
  • FIG. 1 there is schematically depicted in FIG. 1 a reversible drive motor 150.
  • the spinning rotor 90 illustrated in FIG. 5 is provided at its wall with bores 92 arranged at a regular or uniform spacing from one another at the same rotor diameter.
  • Insert members 94 are rotatably mounted in these bores 92, the insert members 94 possessing inclined extending bores 96.
  • the insert members 94 are coupled with one another by any suitable means in such a fashion that they can simultaneously rotate, and thus the bores 96 can change their position relative to the peripheral direction of the rotor.
  • the bores extend from the interior of the rotor 90 in the direction of rotation or opposite to the direction of rotation of such rotor 90, such will convey air out of the rotor interior towards the outside or in the reverse direction.
  • By regulating the angle between the bores 96 and the corresponding peripheral direction analogous to the discussion of the construction of FIG. 4, it is possible to adjust the air quantity which passes through the rotor 90.
  • the wall of the spinning rotor illustrated in the arrangement of FIG. 6 there are alternately arranged at regular spacing from one another at the same rotor diameter two groups of air throughpassage openings 102 and 104 respectively.
  • the air throughpassage openings 102 are designed such that the spinning :rotor 100 conveys air out of its interior towards the outside in the direction of rotation marked by the arrow, whereas the air throughpassage openings 104 are designed such that when such are effectual, air will be conveyed from the surrounding or ambient environment of the rotor 100 into its interior.
  • the air throughpassage openings 104 are covered in the arrangement of FIG.
  • a suitable closure member such as the rotatable diaphragm or stop 106, so that they are ineffectual.
  • the diaphragm 106 is operatively connected with a spring-loaded dis placement mechanism 108 with which cooperates a centrifugal force lever 110.
  • the removal of fibers following yarn rupture can also be carried out by the fiber delivery channel 20 or by means of the yarn withdrawal channel.
  • removal of the fibers during yarn rupture can also take place by a suction pipe or tube which is arranged overhead.
  • a method for cleaning the spinning rotors of openend spinning equipment comprising the steps of reversing the air flow through the spinning rotor upon the occurrence of a yarn rupture condition, detaching flbers from the wall of the spinning; rotor by virtue of the reverse flow of such air current, placing the fibers in a state of suspension and removing such suspended fibers from the spinning rotor.
  • An apparatus for cleaning the spinning rotors of open-end spinning equipment comprising a housing, a spinning rotor equipped with air throughpassage openings arranged within said housing, a fiber delivery channel for delivering fibers to the spinning rotor, yarn withdrawal means for removing the spun yarn from the spinning rotor, and means for reversing the flow of air through the spinning rotor upon the occurrence of yarn rupture.
  • said adjustable means comprises air conveying elements provided for the throughpassage openings for the air flowing through the wall of the spinning rotor.
  • said adjustable means including an adjustment ring, said adjust ment ring further including mechanism for fixing said adjustment ring in one of two terminal positions.
  • said means for reversing the air flow comprises two groups of air throughpassage openings, and closure means for selectably blocking one group of said air throughpassage openings.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US00220325A 1971-01-29 1972-01-24 Method and apparatus for cleaning the spinning rotors of open-end spinning equipment Expired - Lifetime US3739565A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH137671A CH535845A (de) 1971-01-29 1971-01-29 Verfahren und Vorrichtung zum Reinigen der Turbinen von Offenendspinneinrichtungen

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US3739565A true US3739565A (en) 1973-06-19

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US (1) US3739565A (de)
CH (1) CH535845A (de)
DE (1) DE2203608A1 (de)
FR (1) FR2123452B1 (de)
GB (1) GB1311820A (de)
IT (1) IT946561B (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3796034A (en) * 1971-11-30 1974-03-12 Zinser Textilmaschinen Gmbh Open-end spinning apparatus
US3834147A (en) * 1972-10-16 1974-09-10 Vyzk Ustav Bavlnarsky Strand twisting arrangement for an open-ended yarn spinning system
US3845612A (en) * 1972-02-23 1974-11-05 Platt International Ltd Spinning apparatus
US3859779A (en) * 1971-11-05 1975-01-14 Ltg Lufttechnische Gmbh Method of and apparatus for open-end spinning
US3892062A (en) * 1973-04-30 1975-07-01 Fritz Stahlecker Apparatus for start-spinning on an open-end spinning machine
US3895483A (en) * 1973-05-28 1975-07-22 Zinser Textilmaschinen Gmbh Apparatus for cleaning spinning rotors
US3943691A (en) * 1970-10-08 1976-03-16 Platt International Limited Open-end spinning apparatus
US4016713A (en) * 1974-08-23 1977-04-12 Dornier System Gmbh Drive for high-speed axles or shafts of spindles
USRE30167E (en) * 1973-04-30 1979-12-18 Apparatus and method for start-spinning on an open-end spinning machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55163223A (en) * 1979-06-06 1980-12-19 Toyoda Autom Loom Works Ltd Spinning unit of open-end spinning machine
GB8814554D0 (en) * 1988-06-18 1988-07-27 Thor Hammer Co Ltd Dual purpose hammer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3524312A (en) * 1966-08-11 1970-08-18 Schubert & Salzer Maschinen Method and apparatus for cleaning rotary spinning chamber
US3543500A (en) * 1967-06-05 1970-12-01 Tmm Research Ltd Spinning of textile yarns
US3597911A (en) * 1966-08-24 1971-08-10 Rieter Ag Maschf Method and apparatus for cleaning open-end spinning devices

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3524312A (en) * 1966-08-11 1970-08-18 Schubert & Salzer Maschinen Method and apparatus for cleaning rotary spinning chamber
US3597911A (en) * 1966-08-24 1971-08-10 Rieter Ag Maschf Method and apparatus for cleaning open-end spinning devices
US3543500A (en) * 1967-06-05 1970-12-01 Tmm Research Ltd Spinning of textile yarns

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3943691A (en) * 1970-10-08 1976-03-16 Platt International Limited Open-end spinning apparatus
US3859779A (en) * 1971-11-05 1975-01-14 Ltg Lufttechnische Gmbh Method of and apparatus for open-end spinning
US3796034A (en) * 1971-11-30 1974-03-12 Zinser Textilmaschinen Gmbh Open-end spinning apparatus
US3845612A (en) * 1972-02-23 1974-11-05 Platt International Ltd Spinning apparatus
US3834147A (en) * 1972-10-16 1974-09-10 Vyzk Ustav Bavlnarsky Strand twisting arrangement for an open-ended yarn spinning system
US3892062A (en) * 1973-04-30 1975-07-01 Fritz Stahlecker Apparatus for start-spinning on an open-end spinning machine
USRE30167E (en) * 1973-04-30 1979-12-18 Apparatus and method for start-spinning on an open-end spinning machine
US3895483A (en) * 1973-05-28 1975-07-22 Zinser Textilmaschinen Gmbh Apparatus for cleaning spinning rotors
US4016713A (en) * 1974-08-23 1977-04-12 Dornier System Gmbh Drive for high-speed axles or shafts of spindles

Also Published As

Publication number Publication date
IT946561B (it) 1973-05-21
FR2123452A1 (de) 1972-09-08
DE2203608A1 (de) 1972-08-17
CH535845A (de) 1973-04-15
FR2123452B1 (de) 1975-10-24
GB1311820A (en) 1973-03-28

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