WO2012164435A1 - Mécanisme de rattachage amélioré dans une machine de filature pneumatique - Google Patents

Mécanisme de rattachage amélioré dans une machine de filature pneumatique Download PDF

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Publication number
WO2012164435A1
WO2012164435A1 PCT/IB2012/052550 IB2012052550W WO2012164435A1 WO 2012164435 A1 WO2012164435 A1 WO 2012164435A1 IB 2012052550 W IB2012052550 W IB 2012052550W WO 2012164435 A1 WO2012164435 A1 WO 2012164435A1
Authority
WO
WIPO (PCT)
Prior art keywords
yarn
nozzle
piecing
sliver
suction
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.)
Ceased
Application number
PCT/IB2012/052550
Other languages
English (en)
Inventor
Somasundaram KARUPPUSWAMY
Venkatachalam GANAPATHY
Muruga Sivaprakasam KIRUBANANDAM
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.)
Lakshmi Machine Works Ltd
Original Assignee
Lakshmi Machine Works 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
Application filed by Lakshmi Machine Works Ltd filed Critical Lakshmi Machine Works Ltd
Publication of WO2012164435A1 publication Critical patent/WO2012164435A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/11—Spinning by false-twisting
    • D01H1/115—Spinning by false-twisting using pneumatic 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
    • D01H4/48—Piecing arrangements; Control therefor
    • D01H4/50—Piecing arrangements; Control therefor for rotor spinning

Definitions

  • the present invention relates to an improved piecing mechanism in an air spinning machine.
  • This invention particularly relates to the joining of the spun yarn to the drafted fibre during starting and restarting the machine after yarn breakage.
  • the air jet spinning arrangement comprises a drafting zone, involves main drafting zone of pair of apron rollers and delivery rollers and an air spinning device where such yarn is formed by twisting the fibres by utilizing whirling air flow.
  • the piecing process is done by inserting winding side yarn (lead yarn) from spinning nozzle outlet to the spinning device and also the sliver end is guided to the spinning device and these two ends are spliced by spinning process during restarting of the machine and by such way piecing is done.
  • both sliver and winding end are placed in a suction tube away from the spinning device during stationary state.
  • the winding end yarn is guided up to the delivery roller by lifting the top roller and a suction tube is placed to hold the same. Then the sliver end is prepared by stopping the delivery rollers and apron rollers one after another and the apron rollers are slightly moved backward so as to pull the sliver end into the aprons. Therefore, the negative pressure in the suction tube does not affect the sliver end. While piecing, the top rollers are closed and the sliver end is allowed to be spliced along with the winding end right from the delivery roller.
  • the object of the present invention is to eliminate the complicated process in piecing mechanism so as to provide a simple and an improved piecing method in an air spinning machine.
  • Another object of the present invention is to provide a spinning nozzle, which controls the suction for piecing at both the sliver input end and yarn winding end quite simply in an air spinning machine.
  • Yet another object of the present invention is to improve the reliability of piecing and quality of the pieced part of the yarn in an air spinning machine.
  • Yet another object of the present invention is to improve the success rate of piecing and to produce yarn having stable quality.
  • the drafted sliver end is found at the top of the spinning nozzle and wound yarn is collected from the bottom of the nozzle after the breakage of spun yarn occurred.
  • a calculated length of winding end yarn is placed in the outlet of spinning nozzle so that it will be sucked into the whirling zone of air spinning nozzle.
  • a plunger is provided at the sliver input side. The magnitude of suction at winding yarn side is high and suction at sliver input side is low when the plunger is closed or partially open. This plunger will divert the suction, which is required at sliver input side in the normal spinning operation, to winding yarn input side during piecing operation.
  • the sliver is supplied to the nozzle through sliver input side, so that sliver is whirled together with the end part of supplied winding end yarn.
  • the yarn piecing operation is carried out by improving the reliability of piecing and quality of the pieced part of the yarn in an air spinning machine.
  • an improved piecing mechanism in an air spinning machine having a drafting device for supplying sliver in a spinning nozzle for piecing with wound yarn and means for withdrawing a calculated length of wound yarn and placing the yarn in the outlet of the spinning nozzle so that the yarn is sucked into the whirling zone of the spinning nozzle wherein at least a plunger is provided in the nozzle for controlling the suction of the wound yarn.
  • an improved piecing mechanism in an air spinning machine having a drafting device for supplying sliver in a spinning nozzle for piecing with wound yarn and means for withdrawing a calculated length of wound yarn and placing the yarn in the outlet of the spinning nozzle so that the yarn is sucked into the whirling zone of the spinning nozzle wherein a plunger is provided at the sliver input side of the nozzle for controlling the suction of the wound yarn.
  • Figure 1 illustrates the insertion of calculated length of wound yarn (1 ) into the whirling zone (6) of the spinning nozzle (4).
  • Figure 2 illustrates the piecing action of drafted sliver end (7) and wound yarn (1 ) at the whirling zone (6) of the spinning nozzle (4).
  • Figure 3 illustrates the position of the plunger (5) and the direction of the increased sucking air (10) for the entry of winding yarn end (1 ) inside the spinning nozzle (4) before the piecing operation.
  • Figure 4 illustrates the normal spinning operation of air spinning machine.
  • FIG. 5 illustrates the condition after breakage of spun yarn
  • Figure 6 illustrates the condition when air supply to the nozzle is stopped
  • Figure 7 illustrates the condition when the plunger is closed and compressed air is supplied and suction at winding yarn end side is high and suction at sliver end is low.
  • Figure 8 illustrates the condition when wound yarn is taken from the package and placed in front of winding yarn input side
  • Figure 9 illustrates the condition when wound yarn is carried along the air and placed in the spinning zone of the spinning nozzle
  • Figure 10 illustrates the condition when the plunger is open and suction at winding yarn end is low and suction at sliver end is high
  • Figure 11 illustrates the condition when the drafting system is restarted and fibres are placed at sliver input side
  • Figure 12 illustrates the condition when the sliver is sucked into the spinning zone of the spinning nozzle
  • FIG. 13 illustrates the condition when the winding mechanism is restarted.
  • Figure-1 shows the calculated length of wound yarn (1 ) being sucked into the spinning nozzle by placing it in the winding yarn input side (2) (outlet of spinning nozzle) through compressed air (3) produced inside the air spinning nozzle (4).
  • a plunger (5) is placed at sliver input side (8) of the nozzle (4) as shown in figure, which controls the suction at winding yarn input side (2).
  • piecing wound yarn is picked from yarn package and placed at the winding yarn input side (2). Due to partial or full closure of plunger (5) provision, there will be high flow of air at the winding yarn side (2), which will carry the calculated length of yarn into the whirling zone (6) of spinning nozzle (4).
  • the selection of the yarn length is very important, so that it should be sufficient for end part of the wound yarn (1 ) to be placed in the whirling zone (6) of air spinning nozzle (4).
  • the length of the wound yarn (1 ) will be such that the piecing end will be in the middle of the whirling zone (6) as shown in figure-1 , which will be of calculated length, for example around 22 mm.
  • the piecing operation is feasible with the winding yarn when the inserted length is in the range of not less than 20% or not more than 50% of calculated length of yarn.
  • the yarn piecing operation is done by improving the reliability of piecing and quality of the pieced part of the yarn in an air spinning machine when very specific length of wound yarn (1 ) is supplied to the whirling zone (6).
  • suction is low at the winding yarn input side (2) and suction is high at sliver input side (8).
  • the plunger (5) will be open.
  • Figure-2 shows the sliver (7)is being supplied to the spinning nozzle (4), through the sliver input side (8) towards the whirling zone (6), so that it gets whirled together with the end part of the supplied calculated length of wound yarn (1 ) at the whirling zone (6).
  • the piecing of broken yarn according to present invention is carried out by providing plunger (5) in the spinning nozzle (4) which controls the suction for piecing, both at the the sliver (7) input end (8) and winding yarn input side (2) , quite simply in an air spinning machine.
  • Figure-3 shows the partially closed position of the plunger (5) and the direction of the increased suction of air (10) for the entry of wound yarn (1 ) inside the spinning nozzle (4) before the piecing operation.
  • the suction that is used for pulling the drafted sliver (7) in a normal spinning operation is diverted by means of plunger (5), which is placed at the sliver input side (8).
  • the plunger will partially or fully close the sliver input side (8), which results in increased suction (10) at winding yarn input side (2) for drawing the required length of wound yarn (1 ).
  • the plunger (5) will be partially or fully open to allow the drafted sliver (7) inside the nozzle (4), thereby facilitating improved piecing process.
  • the amount of closing distance in the sliver input side (8) by the plunger (5) during piecing is determined by different counts & raw material used for the spinning process.
  • This mechanism eliminates other extra components such as auxiliary nozzle, suction tube, etc. for the piecing purpose.
  • the present invention eliminates the complicated process in the existing piecing mechanism so as to provide a simple and an improved method of piecing in an air spinning machine.
  • Step 1 During normal spinning operation, suction (2) towards whirling zone (6) at the winding yarn side (2) is low. Suction at sliver input side (8) towards whirling zone (6) is high. Compressed air (3) towards whirling zone (6) is ON. The plunger (5) is at open state. This arrangement is shown in figure 4
  • Step 2 The yarn gets cut for some reasons. No yarn is being spun in the nozzle (4). The supplied sliver (7) is eliminated as waste. The suction (2 & 8), compressed air (3) and plunger position (5) remains same as in step 1 . This arrangement is shown in figure 5
  • Step 3 The air supply (3) to the nozzle (4) is cut off and the nozzle (4) is cleaned. Now no sliver or yarn is present in the nozzle (4). Suction (2 & 8) is nil. The plunger (5) is at open state. This arrangement is shown in figure 6
  • Step 4 The plunger (5) is closed and the compressed air (3) is ON.
  • the magnitude of suction (2) at winding yarn side(2) is increased and the magnitude of suction at sliver input side(8) is decreased when compared to that of spinning condition. No sliver or yarn is present in the nozzle (4). This arrangement is shown in figure 7
  • Step 5 The suction at winding yarn input side (2) is high.
  • the suction at sliver input side(8) is low or nil depending upon whether the plunger (5) is fully closed or partially closed.
  • the air (3) is ON.
  • the wound yarn end is picked from the package and placed in front of winding yarn input side (2).
  • the high flow of air at this end carries the yarn end along its flowing direction. Only calculated amount of 22 mm yarn is allowed inside the nozzle (4).
  • the arrangement is shown in figure 8
  • Step 6 The wound yarn end is carried to the whirling zone (6) of the nozzle (4).
  • the yarn end is continuously revolved together with the air in whirling zone (6). This arrangement is shown in figure 9
  • Step 7 The plunger (5) is open. This makes the magnitude of suction at winding yarn side(2) get reduced and the magnitude of suction at sliver input side(8) get increased.
  • the compressed air (3) is still ON.
  • the yarn end continuously revolves in the whirling zone (6) of spinning nozzle (4). This arrangement is shown in figure 10
  • Step 8 Now the drafting system is switched ON.
  • the supplying sliver (7) is placed at the sliver input side (8).
  • the sliver is yet to enter the nozzle (4) and the wound yarn is still revolving in the whirling zone (6). This arrangement is shown in figure 1 1
  • Step 9 The sliver gets sucked into the nozzle (4) due to high suction (8) at sliver input side.
  • the sliver is joined to the wound yarn which is already revolving in the whirling zone (6). This arrangement is shown in figure 12
  • Step 10 The winding mechanism is switched ON. This will pull the yarn from the nozzle (4) and continuous spinning process is started.
  • the suction at winding yarn input side(2) remains low.
  • the suction at sliver input side (8) remains high.
  • the plunger (5) is open and the compressed air (3) remains ON. This arrangement is shown in figure 13

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Abstract

La présente invention concerne un mécanisme de rattachage dans une machine de filature pneumatique équipé d'un dispositif de rentrage pour la fourniture de ruban (7) à la filière (4) et d'un moyen pour le retrait d'une longueur calculée de fil enroulé (1) à partir du rouleau. La longueur calculée de fil est alimentée dans la filière (4) dans laquelle un plongeur (5) est prévu pour contrôler l'aspiration du fil enroulé.
PCT/IB2012/052550 2011-05-31 2012-05-22 Mécanisme de rattachage amélioré dans une machine de filature pneumatique Ceased WO2012164435A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN1847/CHE/2011 2011-05-31
IN1847CH2011 2011-05-31

Publications (1)

Publication Number Publication Date
WO2012164435A1 true WO2012164435A1 (fr) 2012-12-06

Family

ID=47258466

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2012/052550 Ceased WO2012164435A1 (fr) 2011-05-31 2012-05-22 Mécanisme de rattachage amélioré dans une machine de filature pneumatique

Country Status (1)

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WO (1) WO2012164435A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3309281A1 (fr) * 2016-10-05 2018-04-18 Maschinenfabrik Rieter AG Élément de guidage fibres pour jet de filature d'un métier à tisser à jet d'air et procédé de fonctionnement d'un métier à tisser à jet d'air

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229935A (en) * 1978-03-21 1980-10-28 Wain John K Joining yarns
CN1093187C (zh) * 1996-05-16 2002-10-23 村田机械株式会社 纺纱机械的接头方法及其装置
CN101040073A (zh) * 2004-10-15 2007-09-19 里特机械公司 在空气喷嘴纺纱装置上准备接头过程的方法
CN100537862C (zh) * 2003-11-10 2009-09-09 里特机械公司 用于重新开始先前中断的纺纱过程的方法和装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229935A (en) * 1978-03-21 1980-10-28 Wain John K Joining yarns
CN1093187C (zh) * 1996-05-16 2002-10-23 村田机械株式会社 纺纱机械的接头方法及其装置
CN100537862C (zh) * 2003-11-10 2009-09-09 里特机械公司 用于重新开始先前中断的纺纱过程的方法和装置
CN101040073A (zh) * 2004-10-15 2007-09-19 里特机械公司 在空气喷嘴纺纱装置上准备接头过程的方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3309281A1 (fr) * 2016-10-05 2018-04-18 Maschinenfabrik Rieter AG Élément de guidage fibres pour jet de filature d'un métier à tisser à jet d'air et procédé de fonctionnement d'un métier à tisser à jet d'air

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