WO2013098680A1 - An improved sliver guide arrangement in a textile machine - Google Patents

An improved sliver guide arrangement in a textile machine Download PDF

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Publication number
WO2013098680A1
WO2013098680A1 PCT/IB2012/057092 IB2012057092W WO2013098680A1 WO 2013098680 A1 WO2013098680 A1 WO 2013098680A1 IB 2012057092 W IB2012057092 W IB 2012057092W WO 2013098680 A1 WO2013098680 A1 WO 2013098680A1
Authority
WO
WIPO (PCT)
Prior art keywords
sliver
guide arrangement
rotating
sliver guide
arrangement
Prior art date
Application number
PCT/IB2012/057092
Other languages
French (fr)
Inventor
Krishnakumar Narayanaswamy
Narendra Venkateshan
Ganeshkumar Selvaraj
John Lawrence Velanganni
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.
Priority to CN201290001084.5U priority Critical patent/CN204174344U/en
Publication of WO2013098680A1 publication Critical patent/WO2013098680A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/14—Pulleys, rollers, or rotary bars
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G19/00—Combing machines
    • D01G19/06—Details
    • D01G19/08—Feeding apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments
    • B65H2701/311—Slivers

Definitions

  • the present invention relates to spinning preparatory machines, more particularly sliver processing machines such as carding, drawing, combing, lap forming machines having sliver guiding arrangement for assuring efficient sliver transportation during processing.
  • the sliver guide arrangement is a rotating element provided to guide the sliver in a stretch free manner in the transition process of fibrous material between various machine zones.
  • the spinning preparatory machine such as combing machine has row of multiple heads for processing fibre webs, supplied in the rolled form of lap sheets.
  • Combing operation includes the sheet of fibre lap fed via the feed rollers in to the combing section, thereby the fibre webs are held through set of top and bottom nipper pairs and during rotary motion of circular comb, combing action takes place.
  • the noil-free cotton is collected in the form of fibre web by the pair of detaching roller arrangement and converted as sliver by the trumpet and moved to the common delivery table. All the combed slivers from each head are taken around a rotating sliver guides to enable smooth transportation over the common delivery table towards the drafting arrangement.
  • Main function of rotating sliver guide is to provide stretch free transportation, i.e. almost nil stretch during transportation between the various machine zones.
  • linear density / unit area of sliver is maintained in various process stages in a controlled manner.
  • the obstruction in free motion of parts is influenced by various factors such as accumulation of dust, fly, lint, other small waste matters, etc., leads to variation in frictional characteristics.
  • the accumulation of dust particles such as cotton fly is very common in the textile mill and get deposited over a period of working of the machine, this obstruct the free rotation of sliver guides.
  • continuous production of combed sliver influences greater extent for jamming and catching of fluff particles in the moving parts.
  • a rotating sliver guide arrangement has been explained in the prior art Indian patent 174085 under application number 424/M AS/1989, referred in figure 1 a and 1 b.
  • the sliver guide comprises a cylindrical outer sleeve (1 12) mounted rotatably on an inner element (1 13).
  • the inner element (1 13) is fixed on the delivery table (1 14) by means of fastener (1 15).
  • the combed sliver (1 17) runs around the sliver guide (1 1 1 ) and supported above the outward projection of the flange (1 16).
  • the principal object of the present invention is to provide an improved rotating sliver guide arrangement in sliver transportation in a sliver processing machine.
  • Another object of this invention is that a rotating sliver guide arrangement which is suitable for stretch free transportation of combed sliver
  • a further object of the invention is to provide a rotating sliver guide arrangement for sliver processing machine, with simple in construction, cost effective and to provide quality sliver SUMMARY OF INVENTION
  • an improved rotating sliver guide arrangement (1 ) in a combing machine comprising:
  • the rotating sliver guide arrangement (1 ) comprises a cylindrical sleeve (2) rotatably mounted on a bearing pin (3).
  • the radially outwardly projecting flange (6) is formed at the bottom edge of the cylindrical sleeve (2).
  • the cylindrical outer surface of the sleeve (2) merges with the flange (6) by a curvature (8) of suitable radius, which provides sufficient space to accommodate the running combed sliver (7).
  • the combed sliver (7) runs around the sliver guide (1 ) and supported over the flange (6) .
  • the probability of rotating the guide is increased such a manner that the rotating torque generated by the sliver force is considerably sufficient for overcoming the braking torque caused by bearing surface friction (created by the rotational friction between sleeve (2) and bearing pin (3)). This is achieved by keeping the bearing pin (3) radius lesser than half of sliver contact surface radius (The radial distance between the rotating axis and the sliver contact point.) to reduce the braking torque.
  • Figure 1 a of the drawings schematically illustrate the cross sectional view of rotating sliver guide arrangement along with sliver known in the art.
  • Figure 1 b of the drawings schematically illustrate the top view of rotating sliver guide arrangement along with sliver of known art.
  • Figure 2a of the drawings schematically illustrate the side view of rotating sliver guide arrangement along with sliver of present invention.
  • Figure 2b of the drawings schematically illustrate the top view of rotating sliver guide arrangement along with sliver of present invention.
  • Rotating sliver guide as per the known art is illustrated in figure 1 a and 1 b, which is explained in detail in the background of the invention.
  • Rotating sliver guide as per the present invention is illustrated in figure 2a and 2b.
  • the rotating sliver guide arrangement (1 ) comprises a cylindrical sleeve (2) preferably made of polymer having a mounting hole at the centre of axis.
  • the cylindrical sleeve (2) is rotatably mounted on a bearing pin (3). There is a radial clearance maintained between the bearing pin (3) and the mounting hole of the cylindrical sleeve (2) to facilitate free rotation.
  • the bearing pin (3) is fixed in upright position through the guide slot (5a) provided on the delivery table (4) by means of fastener (5).
  • the radially projecting flange (6) is formed at the bottom edge of the cylindrical sleeve (2).
  • the cylindrical outer surface of the sleeve (2) merges with the flange (6) by a curvature (8) of suitable radius.
  • the combed sliver (7) runs around the sliver guide (1 ) and supported on the flange (6) which provides sufficient space to accommodate the running combed sliver.
  • the rotating sliver guide (1 ) is mounted in the guide slot (5a) of the delivery table (4) in an adjustable manner.
  • the bottom surface of the flange (6) is spaced apart by a small distance, just above the surface of the delivery table (4).
  • the free rotation of the sliver guide (1 ) depends on the factors such as running sliver (7) tension force, sliver contact area (9) and bearing pin (3) contact area.
  • the trouble free rotation of the sliver guide is achieved in such a manner that the rotating torque generated by the sliver force is considerably sufficient for overcoming the braking torque caused by bearing friction. This is achieved by keeping the bearing pin (3) radius lesser than half of sliver contact surface radius (The distance between the rotating axis and the sliver contact point on sleeve) to reduce the braking torque.
  • the sliver guide arrangement (1 ) as per the invention gives smooth, reliable and trouble free rotation.
  • the advantage being unwanted sliver stretch is avoided and better distribution of draft over the length can be achieved.

Landscapes

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

Abstract

An improved sliver guide arrangement for use in textile sliver drawing machine. The arrangement comprises a cylindrical sleeve (2) rotatably mounted on a bearing pin (3). A radially outwardly projecting flange (6) is formed at the bottom edge of the cylindrical sleeve. The cylindrical outer surface of the sleeve merges with the flange by a curvature of suitable radius, which provides sufficient space to accommodate the running combed sliver. The bearing pin having less radius (Rb) than half of the sliver contact radius (Rs). The arrangement will be more advantageous as the braking torque is very less, so that better rotation of the sliver guide is established.

Description

AN IMPROVED SLIVER GUIDE ARRANGEMENT IN A
TEXTILE MACHINE FIELD OF THE INVENTION
The present invention relates to spinning preparatory machines, more particularly sliver processing machines such as carding, drawing, combing, lap forming machines having sliver guiding arrangement for assuring efficient sliver transportation during processing.
According to the invention, the sliver guide arrangement is a rotating element provided to guide the sliver in a stretch free manner in the transition process of fibrous material between various machine zones. BACKGROUND OF THE INVENTION
Generally the spinning preparatory machine such as combing machine has row of multiple heads for processing fibre webs, supplied in the rolled form of lap sheets. Combing operation includes the sheet of fibre lap fed via the feed rollers in to the combing section, thereby the fibre webs are held through set of top and bottom nipper pairs and during rotary motion of circular comb, combing action takes place. After combing has been done, the noil-free cotton is collected in the form of fibre web by the pair of detaching roller arrangement and converted as sliver by the trumpet and moved to the common delivery table. All the combed slivers from each head are taken around a rotating sliver guides to enable smooth transportation over the common delivery table towards the drafting arrangement.
Main function of rotating sliver guide is to provide stretch free transportation, i.e. almost nil stretch during transportation between the various machine zones. In the textile yarn manufacturing process, linear density / unit area of sliver is maintained in various process stages in a controlled manner. However the minor variations of surface speeds, frictional characteristics, etc., could not be avoidable. The obstruction in free motion of parts is influenced by various factors such as accumulation of dust, fly, lint, other small waste matters, etc., leads to variation in frictional characteristics. The accumulation of dust particles such as cotton fly is very common in the textile mill and get deposited over a period of working of the machine, this obstruct the free rotation of sliver guides. And continuous production of combed sliver influences greater extent for jamming and catching of fluff particles in the moving parts.
A rotating sliver guide arrangement has been explained in the prior art Indian patent 174085 under application number 424/M AS/1989, referred in figure 1 a and 1 b. There is an individual rotating sliver guide (1 1 1 ) for each combing head used to deflect a sliver in right angle, i.e. a combed sliver coming from a combing head of a combing machine takes approximately right angle on to a delivery table (1 14) and runs towards the drafting arrangement (not shown). The sliver guide comprises a cylindrical outer sleeve (1 12) mounted rotatably on an inner element (1 13). The inner element (1 13) is fixed on the delivery table (1 14) by means of fastener (1 15). The combed sliver (1 17) runs around the sliver guide (1 1 1 ) and supported above the outward projection of the flange (1 16).
In the practical working of the known art, it is observed that the rotation of sliver guide (1 1 1 ) is interrupted during machine running. Since the inner element (1 13) has bigger diameter, the rotating torque generated by the running sliver tension force is not overcoming braking torque caused by the bearing surface friction (created by the rotational friction between sleeve (1 12) and inner element (1 13). Due to the interrupted rotation of the sliver guide, unwanted sliver stretch is created, there by sliver quality is affected.
OBJECTS OF THE INVENTION
The principal object of the present invention is to provide an improved rotating sliver guide arrangement in sliver transportation in a sliver processing machine.
Another object of this invention is that a rotating sliver guide arrangement which is suitable for stretch free transportation of combed sliver
A further object of the invention is to provide a rotating sliver guide arrangement for sliver processing machine, with simple in construction, cost effective and to provide quality sliver SUMMARY OF INVENTION
According to the aspects of present invention, provided an improved rotating sliver guide arrangement (1 ) in a combing machine, said arrangement comprising: The rotating sliver guide arrangement (1 ) comprises a cylindrical sleeve (2) rotatably mounted on a bearing pin (3). The radially outwardly projecting flange (6) is formed at the bottom edge of the cylindrical sleeve (2). The cylindrical outer surface of the sleeve (2) merges with the flange (6) by a curvature (8) of suitable radius, which provides sufficient space to accommodate the running combed sliver (7). The combed sliver (7) runs around the sliver guide (1 ) and supported over the flange (6) .
In the present invention, the probability of rotating the guide is increased such a manner that the rotating torque generated by the sliver force is considerably sufficient for overcoming the braking torque caused by bearing surface friction (created by the rotational friction between sleeve (2) and bearing pin (3)). This is achieved by keeping the bearing pin (3) radius lesser than half of sliver contact surface radius (The radial distance between the rotating axis and the sliver contact point.) to reduce the braking torque.
BRIEF DESCRIPTION OF THE DRAWING
Figure 1 a of the drawings schematically illustrate the cross sectional view of rotating sliver guide arrangement along with sliver known in the art.
Figure 1 b of the drawings schematically illustrate the top view of rotating sliver guide arrangement along with sliver of known art.
Figure 2a of the drawings schematically illustrate the side view of rotating sliver guide arrangement along with sliver of present invention. Figure 2b of the drawings schematically illustrate the top view of rotating sliver guide arrangement along with sliver of present invention. BRIEF DESCRIPTION OF THE INVENTION
Rotating sliver guide as per the known art is illustrated in figure 1 a and 1 b, which is explained in detail in the background of the invention. Rotating sliver guide as per the present invention is illustrated in figure 2a and 2b. The rotating sliver guide arrangement (1 ) comprises a cylindrical sleeve (2) preferably made of polymer having a mounting hole at the centre of axis. The cylindrical sleeve (2) is rotatably mounted on a bearing pin (3). There is a radial clearance maintained between the bearing pin (3) and the mounting hole of the cylindrical sleeve (2) to facilitate free rotation. The bearing pin (3) is fixed in upright position through the guide slot (5a) provided on the delivery table (4) by means of fastener (5).
The radially projecting flange (6) is formed at the bottom edge of the cylindrical sleeve (2). The cylindrical outer surface of the sleeve (2) merges with the flange (6) by a curvature (8) of suitable radius. The combed sliver (7) runs around the sliver guide (1 ) and supported on the flange (6) which provides sufficient space to accommodate the running combed sliver. The rotating sliver guide (1 ) is mounted in the guide slot (5a) of the delivery table (4) in an adjustable manner. In order to enable free rotation of cylindrical sleeve (2) on the bearing pin (3), the bottom surface of the flange (6) is spaced apart by a small distance, just above the surface of the delivery table (4).
The free rotation of the sliver guide (1 ) depends on the factors such as running sliver (7) tension force, sliver contact area (9) and bearing pin (3) contact area.
In the present invention, the trouble free rotation of the sliver guide is achieved in such a manner that the rotating torque generated by the sliver force is considerably sufficient for overcoming the braking torque caused by bearing friction. This is achieved by keeping the bearing pin (3) radius lesser than half of sliver contact surface radius (The distance between the rotating axis and the sliver contact point on sleeve) to reduce the braking torque.
It is be given by,
Rb / Rs < 0.5
Where Rb = Bearing pin radius
Rs = Sliver contact radius
The sliver guide arrangement (1 ) as per the invention gives smooth, reliable and trouble free rotation. The advantage being unwanted sliver stretch is avoided and better distribution of draft over the length can be achieved.
Although the present invention has been fully described in connection with the preferred embodiment thereof with reference to the accompanying drawings, it is to be noted that various changes and modifications are possible and are apparent to those skilled in the art. Such changes and modifications are to be understood as included within the scope of the present invention as defined by the appended claims.

Claims

CLAIMS: 1 . An improved rotating sliver guide arrangement of a textile machine comprising cylindrical sleeve (2) rotatably mounted on bearing pin (3), wherein the bearing pin radius (Rb) is lesser than half of sliver contact surface radius (Rs)
2. An improved rotating sliver guide arrangement of a textile machine as claimed in claim 1 , wherein said sliver contact surface radius (Rs) is the radial distance between the rotating axis and the sliver contact point on sleeve (2)
3. An improved rotating sliver guide arrangement of a textile machine as claimed in claim 1 , wherein said sliver guide arrangement (1 ) is mounted in a guide slot (5a) of the delivery table (4) in an adjustable manner.
PCT/IB2012/057092 2011-12-29 2012-12-08 An improved sliver guide arrangement in a textile machine WO2013098680A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201290001084.5U CN204174344U (en) 2011-12-29 2012-12-08 The rotation strip guiding device of weaving loom

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN4641CH2011 2011-12-29
IN4641/CHE/2011 2011-12-29

Publications (1)

Publication Number Publication Date
WO2013098680A1 true WO2013098680A1 (en) 2013-07-04

Family

ID=48696430

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2012/057092 WO2013098680A1 (en) 2011-12-29 2012-12-08 An improved sliver guide arrangement in a textile machine

Country Status (2)

Country Link
CN (1) CN204174344U (en)
WO (1) WO2013098680A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3349462A (en) * 1966-06-14 1967-10-31 Lambert H Mott Air roller
US3746233A (en) * 1971-07-09 1973-07-17 Barmag Barmer Maschf Air-supported thread overrun roller
US3753517A (en) * 1971-11-26 1973-08-21 Teijin Ltd Guide roll for filaments
US5023977A (en) * 1988-07-04 1991-06-18 Riter Machine Works, Ltd. Sliver guide for a textile machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3349462A (en) * 1966-06-14 1967-10-31 Lambert H Mott Air roller
US3746233A (en) * 1971-07-09 1973-07-17 Barmag Barmer Maschf Air-supported thread overrun roller
US3753517A (en) * 1971-11-26 1973-08-21 Teijin Ltd Guide roll for filaments
US5023977A (en) * 1988-07-04 1991-06-18 Riter Machine Works, Ltd. Sliver guide for a textile machine

Also Published As

Publication number Publication date
CN204174344U (en) 2015-02-25

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