EP1007772B1 - Spinning rotor of an open-end spinning machine - Google Patents

Spinning rotor of an open-end spinning machine Download PDF

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Publication number
EP1007772B1
EP1007772B1 EP98910577A EP98910577A EP1007772B1 EP 1007772 B1 EP1007772 B1 EP 1007772B1 EP 98910577 A EP98910577 A EP 98910577A EP 98910577 A EP98910577 A EP 98910577A EP 1007772 B1 EP1007772 B1 EP 1007772B1
Authority
EP
European Patent Office
Prior art keywords
rotor
ventilation
axis
spinning
truncated cone
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
EP98910577A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1007772A1 (en
Inventor
Oldrich Tesar
Milos Mladek
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.)
Rieter Elitex AS
Original Assignee
Rieter Elitex AS
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 Rieter Elitex AS filed Critical Rieter Elitex AS
Publication of EP1007772A1 publication Critical patent/EP1007772A1/en
Application granted granted Critical
Publication of EP1007772B1 publication Critical patent/EP1007772B1/en
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
    • D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor
    • D01H4/10—Rotors

Definitions

  • the invention relates to a spinning rotor of an open-end spinning machine, a cavity of which comprises a gliding surface followed by a collecting groove comprises an inclined overflow surface which passes via an arched transfer surface into an inclined defining surface leading onto an inner surface of the bottom of the rotor, which is formed by an inwards deflected truncated cone which includes ventilation channels and through-going ventilation grooves.
  • None of the currently used rotors is capable of spinning yarn, especially yarn spun from mixed yarn with high proportion of flax fibres, or pure flax fibre yarn because the air flow in such rotors does not have the needed qualities in combination with the needed level of self-cleaning abilities of these rotors.
  • Mixed yam with certain lower proportion of flax fibres, max. about 30% can be spun e.g. by a rotor according to CS AO 272017, which has a special shape of the collecting groove and the bottom of which comprises the ventilation channels.
  • CS AO 254785 Another rotor for open-end spinning of mixed yam with certain proportion of flax fibres is disclosed in CS AO 254785, which describes a spinning rotor with a collecting groove, ventilation channels and ventilation grooves leading from the rotor cavity into the channels. Ventilation grooves solve reduction of noisiness of ventilation channels and increase their efficiency.
  • This spinning rotor can be used only in spinning mixed yam with very small proportion of flax fibres. Spinning of mixed yarn with higher proportion of flax fibres, or the pure flax fibre yarn is impossible, especially due to the inconvenient shape of the collecting groove because of which fibre band twisting into the yarn is not achieved.
  • the aim of the invention is to invent a spinning rotor for an open-end spinning of the yarn with up to 100% high proportion of flax fibres.
  • the aim of the invention by spinning rotors with ventilation channels is achieved by combination of the shape of collecting groove of spinning rotor and ventilation grooves arranged in the bottom of spinning rotor, whereby principle of the invention consists in that each ventilation groove passes through its respective ventilation channel in at least a part of its length.
  • the overflow surface comprises a lateral area of a truncated cone with taper angle of 10 - 20°, where the axis of symmetry is the same as the axis of rotation and this truncated cone is in the direction from the bigger base to the smaller base oriented to the inlet aperture
  • the transfer surface advantageously comprises circumferential surface of a toroid and the defining surface comprises lateral area of a truncated cone with taper angle of 50 - 59°
  • the axis of symmetry is the same as the axis of rotation and this truncated cone is oriented from the bigger base to the smaller base in the opposite direction as compared with the truncated cone, by which the lateral area forms the overflow surface, by means of which with combination with ventilation grooves optimal conditions for fibre band twisting of pure flax fibres into yam and good spinnability are obtained.
  • auxiliary gliding surface provided between the gliding surface and overflow surface of the collecting groove, by which better conditions are reached in flax fibre transition from gliding surface onto overflow surface of the collecting groove.
  • auxiliary gliding surface comprises a truncated cone lateral area whose axis of symmetry is identical with the axis of rotor rotation and taper angle of this truncated cone is of 50 - 60°, and the truncated cone is in the direction from the bigger base to the smaller base oriented to the inlet aperture, by which the optimal conditions are reached for flax fibre transition from the gliding surface onto the overflow surface of the collecting groove.
  • each ventilation groove Is displaced with respect to the axis of symmetry of its corresponding ventilation channel in the direction opposite to that of the rotor rotation by which the positive influence of air flow on the process of flax fibre spinning and self-cleaning ability of the rotor is still more increased.
  • each ventilation groove is situated in a plane defined by the axis of rotor rotation and by the longitudinal axis of symmetry of its corresponding ventilation channel, and the opposite side surface of each ventilation groove is situated in a plane parallel to it, which is spaced from it less than half the diameter of the ventilation channels in the direction opposite to that of the rotor rotation thus eliminating one ventilation groove edge on its transition into the ventilation channel, by means of this achieving the optimal effect of air flow on the flax fibre spinning process with high self-cleaning ability of the rotor.
  • the ventilation grooves advantageously comprise inclined front surface passing into the inner surface of the rotor bottom near the transition of the defining surface of the collecting groove into the inner surface of the rotor bottom, whereby maximisation of positive effect on the air flow in rotor, on the moving of flax fibre into collecting groove, on the creating of fibre band and on the fibre band twisting into yarn is achieved.
  • the spinning rotor comprises an inlet aperture 1 leading onto a gradually widening gliding surface 2 formed by the lateral area of a truncated cone with a taper angle of 75°, the longitudinal axis of which lies in the axis of the rotor rotation and whose gliding surface 2 passes to a collecting groove 3 .
  • the collecting groove 3 passes steplessly into an inner surface 4 of the bottom 5 of the spinning rotor.
  • the bottom 5 of the spinning rotor comprises ventilation channels 6 , which pass through from the inner surface 4 of the bottom 5 of the spinning rotor to the outer surface 7 of the bottom 5 of the spinning rotor.
  • the bottom 5 of the spinning rotor also includes ventilation grooves 8 that connect the spinning rotor cavity with the ventilation channels 6 in such a way that one ventilation groove 8 passes into each ventilation channel 6 .
  • the collecting groove 3 of the spinning rotor comprises the gliding surface 2 which is related to an overflow surface 31 which leads onto a transfer surface 32 which then passes onto a defining surface 33 which leads directly onto the inner surface 4 of the bottom 5 of the spinning rotor.
  • auxiliary gliding surface 21 situated between the gliding surface 2 and the overflow surface 31 of the collecting groove 3 , the auxiliary surface 21 being formed by the lateral area of a truncated cone the axis of symmetry of which is identical with the axis of rotation and the taper angle of this truncated cone is 50° - 60°, and the truncated cone is oriented in the direction from the bigger base to the smaller base to the inlet aperture 1 .
  • the overflow surface 31 is formed by the lateral area of a truncated cone with taper angle of 10° - 20° where the axis of this cone is identical with the rotor axis of rotation and the truncated cone is oriented in the direction from the bigger base to the smaller base to the inlet aperture 1 of the rotor.
  • the overflow surface 31 is connected to the transfer surface 32 , which is shaped as a part of a toroid surface with small diameter, by which the overflow surface 31 passes over to the defining surface 33 which has the shape of the lateral area of a truncated cone with a taper angle of 50° - 59° and the truncated cone is oriented in the direction from the bigger base to the smaller base to the bottom 5 of the rotor any by its edge between its base and lateral area it passes into the inner surface 4 of the bottom 5 of the rotor, which has the shape of an inwards deflected lateral area of a truncated cone as shown in Fig. 1 and 2.
  • the inner surface 4 of the bottom 5 passes into a closing surface 41 into which an aperture 42 for the well-known positioning of the rotor onto a not shown well-known shaft of the rotor leads.
  • the ventilation channels 6 lead into the lower part of the inner surface 4 of the bottom 5 of the rotor over the closing surface 41 and they are all over their length connected with the rotor cavity by the passing through ventilation grooves 8 , where the ventilation grooves 8 are with respect to the axis of rotation of their related ventilation channels 6 , displaced in the direction opposite to the rotor rotation as shown in Fig. 3.
  • FIG. 1 Another, not shown, example of spinning rotor embodiment consists in that the ventilation channels 6 are connected with the cavity of the spinning rotor by only a part of their length.
  • each ventilation groove 8 is smaller than half the diameter of the ventilation channels 6 , and the side walls of each ventilation groove 8 are parallel to each other.
  • the ventilation grooves 8 are positioned in such a way that one of their side walls lies in the plane defined by the axis of rotation and the longitudinal axis of symmetry of the respective ventilation channel 6 as shown in Fig. 3 and Fig. 4, where the second side wall of each ventilation groove 8 is to the first side wall of this ventilation groove 8 displaced in the direction opposite to the rotor rotation.
  • the front surface 81 of the ventilation groove 8 is inclined with respect to the plane vertically to the axis of rotor rotation and it passes into the inner surface 4 of the bottom 5 of the rotor near this inner surface 4 of the bottom 5 of the rotor transition into the defining surface 33 of the collecting groove 3 of the rotor, which is an embodiment shown in the drawings formed by a curvated surface. In another, not shown, example embodiment the front surface 81 of the ventilation groove 8 is formed by a different type of surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP98910577A 1997-04-08 1998-04-08 Spinning rotor of an open-end spinning machine Expired - Lifetime EP1007772B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CZ19971063A CZ288214B6 (en) 1997-04-08 1997-04-08 Spindleless spinning machine spinning rotor
CZ106397 1997-04-08
PCT/CZ1998/000018 WO1998045514A1 (en) 1997-04-08 1998-04-08 Spinning rotor of an open-end spinning machine

Publications (2)

Publication Number Publication Date
EP1007772A1 EP1007772A1 (en) 2000-06-14
EP1007772B1 true EP1007772B1 (en) 2003-03-12

Family

ID=5462691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98910577A Expired - Lifetime EP1007772B1 (en) 1997-04-08 1998-04-08 Spinning rotor of an open-end spinning machine

Country Status (5)

Country Link
EP (1) EP1007772B1 (cs)
AU (1) AU6494098A (cs)
CZ (1) CZ288214B6 (cs)
DE (1) DE69812112T2 (cs)
WO (1) WO1998045514A1 (cs)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104213291A (zh) * 2014-08-22 2014-12-17 东华大学 一种花式纱及其纺制方法
CN104213294A (zh) * 2014-08-22 2014-12-17 东华大学 一种花式纱及其纺制方法
CN104213288A (zh) * 2014-08-22 2014-12-17 东华大学 一种花式纱及其纺制方法
CN104213290A (zh) * 2014-08-22 2014-12-17 东华大学 一种花式纱及其纺制方法
CN104213270A (zh) * 2014-08-22 2014-12-17 东华大学 一种转杯
CN104213289A (zh) * 2014-08-22 2014-12-17 东华大学 一种花式纱及其纺制方法
CN104213269A (zh) * 2014-08-22 2014-12-17 东华大学 一种转杯
CN104213293A (zh) * 2014-08-22 2014-12-17 东华大学 一种花式纱及其纺制方法
CN104213296A (zh) * 2014-08-22 2014-12-17 东华大学 一种花式纱及其纺制方法
CN104264295A (zh) * 2014-08-22 2015-01-07 东华大学 一种转杯
CN104264296A (zh) * 2014-08-22 2015-01-07 东华大学 一种转杯
CN104264306A (zh) * 2014-08-22 2015-01-07 东华大学 一种花式纱及其纺制方法
CN104264297A (zh) * 2014-08-22 2015-01-07 东华大学 一种转杯

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19910277B4 (de) * 1999-03-09 2010-11-04 Oerlikon Textile Gmbh & Co. Kg Spinnrotor für Offenend-Spinnmaschinen
US8475628B1 (en) 2011-03-29 2013-07-02 Hbi Branded Apparel Enterprises, Llc Process and apparatus for orienting bast stalks for decortication
US8635844B1 (en) 2011-03-29 2014-01-28 Hbi Branded Apparel Enterprises, Llc Method for harvesting bast plants
CN104278389B (zh) * 2014-08-22 2017-02-15 东华大学 一种花式纱及其纺制方法
CN104213295B (zh) * 2014-08-22 2017-05-17 东华大学 一种花式纱及其纺制方法
CN104213266B (zh) * 2014-08-22 2017-08-04 东华大学 一种转杯
CN104213267B (zh) * 2014-08-22 2016-11-23 东华大学 一种转杯
DE102015108797A1 (de) * 2015-06-03 2016-12-08 Maschinenfabrik Rieter Ag Offenendspinnrotor mit einer Rotortasse mit einer Fasersammelrille, einem Rotorboden und eine Faserrutschwand und Offenendspinnvorrichtung mit einem Offenendspinnrotor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3952493A (en) * 1974-02-20 1976-04-27 Igor Stepanovich Khomyakov Apparatus for ringless spinning of fibers
FR2425484A1 (fr) * 1978-05-09 1979-12-07 Alsacienne Constr Meca Perfectionnement aux rotors de dispositifs de filature de fibres liberees
JPS60173124A (ja) * 1984-02-14 1985-09-06 Toyoda Autom Loom Works Ltd オ−プンエンド精紡機における回転紡糸室

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104213291A (zh) * 2014-08-22 2014-12-17 东华大学 一种花式纱及其纺制方法
CN104213294A (zh) * 2014-08-22 2014-12-17 东华大学 一种花式纱及其纺制方法
CN104213288A (zh) * 2014-08-22 2014-12-17 东华大学 一种花式纱及其纺制方法
CN104213290A (zh) * 2014-08-22 2014-12-17 东华大学 一种花式纱及其纺制方法
CN104213270A (zh) * 2014-08-22 2014-12-17 东华大学 一种转杯
CN104213289A (zh) * 2014-08-22 2014-12-17 东华大学 一种花式纱及其纺制方法
CN104213269A (zh) * 2014-08-22 2014-12-17 东华大学 一种转杯
CN104213293A (zh) * 2014-08-22 2014-12-17 东华大学 一种花式纱及其纺制方法
CN104213296A (zh) * 2014-08-22 2014-12-17 东华大学 一种花式纱及其纺制方法
CN104264295A (zh) * 2014-08-22 2015-01-07 东华大学 一种转杯
CN104264296A (zh) * 2014-08-22 2015-01-07 东华大学 一种转杯
CN104264306A (zh) * 2014-08-22 2015-01-07 东华大学 一种花式纱及其纺制方法
CN104264297A (zh) * 2014-08-22 2015-01-07 东华大学 一种转杯
CN104264296B (zh) * 2014-08-22 2016-08-17 东华大学 一种转杯
CN104264306B (zh) * 2014-08-22 2016-11-09 东华大学 一种花式纱及其纺制方法
CN104213290B (zh) * 2014-08-22 2017-02-15 东华大学 一种花式纱及其纺制方法

Also Published As

Publication number Publication date
WO1998045514A1 (en) 1998-10-15
CZ106397A3 (cs) 1998-10-14
CZ288214B6 (en) 2001-05-16
DE69812112D1 (de) 2003-04-17
AU6494098A (en) 1998-10-30
DE69812112T2 (de) 2003-10-09
EP1007772A1 (en) 2000-06-14

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