EP0252569B1 - Improvements to carding process - Google Patents

Improvements to carding process Download PDF

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Publication number
EP0252569B1
EP0252569B1 EP87201296A EP87201296A EP0252569B1 EP 0252569 B1 EP0252569 B1 EP 0252569B1 EP 87201296 A EP87201296 A EP 87201296A EP 87201296 A EP87201296 A EP 87201296A EP 0252569 B1 EP0252569 B1 EP 0252569B1
Authority
EP
European Patent Office
Prior art keywords
slubbing
flume
bobbin
spool
tension
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
EP87201296A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0252569A3 (en
EP0252569A2 (en
Inventor
Martin Butterworth
John Coulter
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.)
Wool Development International Ltd
Wool Research Organization of New Zealand Inc
Original Assignee
Wool Development International Ltd
Wool Research Organization of New Zealand Inc
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 Wool Development International Ltd, Wool Research Organization of New Zealand Inc filed Critical Wool Development International Ltd
Priority to AT87201296T priority Critical patent/ATE100155T1/de
Publication of EP0252569A2 publication Critical patent/EP0252569A2/en
Publication of EP0252569A3 publication Critical patent/EP0252569A3/en
Application granted granted Critical
Publication of EP0252569B1 publication Critical patent/EP0252569B1/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
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/46—Doffing or like arrangements for removing fibres from carding elements; Web-dividing apparatus; Condensers
    • D01G15/62—Slubbing-winding apparatus
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/04—Guides for slivers, rovings, or yarns; Smoothing dies

Definitions

  • the present invention relates generally to the manufacture of spun yarns by the woollen system and more particularly relates to a woollen carding process and the production of denser spools of woollen slubbings or slivers.
  • the raw material or blend of staple fibres is carded with the objects of disentangling the fibres from each other, freeing dirt, vegetable matter and other unwanted contaminants, improving the mixing of fibres, particularly when more than one fibre type is included in the blend, evening out the flow of material to produce a web of fibres as uniform as possible in density, and finally splitting the web into parallel ribbons, consolidating those ribbons into slubbings, slivers and rubbing them between two oscillating surfaces, and winding the slubbings into packages suitable for spinning.
  • the raw material may consist of 100% wool or other natural fibre, blends of natural fibres with man-made or synthetic fibres, or 100% synthetic fibres. However, irrespective of the raw material processed such a process is commonly known as the woollen process by historical tradition.
  • Slubbings are normally wound on to spools, empty spools being creeled on the card relative to a series of guides which ensure that the slubbings are wound side by side on the spools in an orderly fashion.
  • the spools are creeled on the card such that they rest on driven rollers which in turn drive the spools by frictional contact to effect winding.
  • several ends of slubbing are wound on to one spool, and a regular traverse oscillation is provided between the spools and the slubbing guides such that 'cheeses' of slubbing are wound.
  • the number of cheeses of slubbing wound on to each spool varies according to the gauge of the spinning machine on which the yarn is to be spun and is thus governed largely by the count of the yarn.
  • Slubbings are produced and wound on the card as soft twistless strands having low tensile strength. Some tensile strength is derived from interfibre entanglements and consolidation of the fibres assembly in the rubbing process and this strength is sufficient to enable winding of the slubbings at a low tension draft of about 6% without irregularly stretching the slubbings or in any way reducing their evenness. Thus spools of slubbings tend to be soft with the density in the material of the order of 0.15 g/cc, depending on the raw material being processed. This low density of material limits the amount of slubbing which can be wound on a full spool of reasonable and acceptable diameter.
  • Spools of woollen slubbings are handled at the card and again at the spinning frame, and in practice spool-related tasks form a high proportion of the total labour requirement in both carding and spinning.
  • the material capacity of the spool thus has a limiting effect on the economic efficiencies of both the carding process and the spinning process.
  • European patent publication 0181697 discloses a method of handling slubbings in the woollen process which includes positioning one or more finger guides in the path of the same number of slubbings, and wrapping a slubbing round each finger guide to thereby create a stress or tension therein before the slubbings are directed for further processing.
  • Fr-A-2232503 discloses an annular segment having a groove for guiding a moving filament. The segment is blown by the action of air and pivots allowing the filament to be tensioned between the segment and adjacent abutments.
  • US-A-3631689 discloses plates of resistant material over which threads in a warp to be laid into a knitting machine are passed. The plates can be deformed to vary the tension applied to the threads.
  • the invention seeks to provide a method and apparatus for winding slubbings tightly improved in the above respects.
  • a method of handling slubbings in the woollen process which comprises placing a guide in the path of the slubbing to create a stress of tension therein before the slubbing is directed for further processing characterised in that the guide comprises a curved flume along which the slubbing passes and the point at which the slubbing enters the flume, and thereby the amount of tension created in the slubbing, is varied by means of a variable slubbing guide.
  • the curved flume will be generally V-shaped in section and positioned in the vicinity of the condenser drum and condenser bobbin or spool of a woollen card with one end of the flume being close to the nip between the condenser drum and bobbin.
  • the or each slubbing passing from the condenser rubbing apron of the card passes through an associated flume where tension is created by the frictional engagement between the slubbing and the flume.
  • the point at which the slubbing enters the flume, and thereby the amount of tension created in the slubbing may be varied continuously by means of a variable slubbing guide.
  • the distance from the end of the flume closest to the nip between the condenser drum and the spool be kept substantially constant as the bobbin fills to thereby avoid the possibility of yarn property variations within the bobbin. This is achieved by modifying the standard track of the bobbin so that the nip remains in the same place as the bobbin fills. It has also been found that the raddle traverse for winding the slubbing on the spool, which is normally a simple harmonic motion controlled by an offset cam or pin, requires modification since the slowing down of the normal motion at each end of the traverse causes a concave package to be formed.
  • the raddle cam in the method of the invention is therefore preferably modified to a cardioid cam giving substantially constant speed of movement over the bulk of the traverse combined with rapid deceleration and acceleration at each end.
  • a standard woollen card comprises a condenser drum 10 and associated condenser take-up spool or bobbin 12.
  • Slubbing 14 is fed from condenser rubbing aprons 16 in the normal way.
  • the axis of rotation 20 of the bobbin is arranged to run on an inclined track 22 positioned so as to achieve this end.
  • a curved flume 24 is located on the card raddle shaft 26 in the region of the condenser drum 10, the distal end 28 of which flume is located at a short distance 'D' from the nip 18.
  • the flume is generally 'V' shaped in section over the bulk of its length but may have a further constriction illustrated in figure 1 at 30 adjacent its distal end 28.
  • the slubbing 14 is led into the flume 24 by means of a slubbing guide 32 whose position is adjustable so as to change the length of travel of the slubbing 14 within the flume 24 and thereby the tension created in the slubbing.
  • the slubbing 14 is led through the guide 32 into the flume 24 and thence to the nip 18 where it is taken up on the bobbin 12.
  • the differential speed between the condenser drum and take up spool on the one hand and the condenser rubbing aprons on the other causes the slubbing 14 to pull against the arcuate surface of the flume.
  • the frictional contact in turn creates the tension within the slubbing and causes it to exit from the distal end 28 of the flume in a compacted form.
  • Adjustment of the guide 32 varies the length of the flume in contact with the slubbing and thereby the degree of tension and degree of compactness created in the slubbing.
  • the distance D should be kept constant and this is achieved as discussed above by arranging the track 22 so that the axis 20 of the gradually filling bobbin 12 moves away from the nip 18 in a direction normal to the circumference of the condenser drum at the point.
  • the flume 24 is connected to the raddle shaft 26 which is caused to traverse by a mechanism described best by reference to figure 3.
  • the standard raddle traverse cam is replaced by a cardioid cam 32 driving a cam follower 34 pivotted at one end 36 to the framework of the card.
  • the cam follower 34 includes a slot within which is located a pin 38 of a traverse follower member 40 attached to one end of the raddle shaft at 42.
  • the cam 32 ensures that the raddle traverse motion has substantially constant speed over the greater part of its travel, rapidly decelerating and then accelerating again at the reversal points at each end of the traverse.
  • the length of traverse can be adjusted by adjusting the traverse follower 40 by means of the attachment 42. Moving the traverse follower 40 to the right as viewed in figure 3 shortens the raddle traverse and vice versa.
  • the apparatus of the invention incorporates a self adjusting facility.
  • the slubbing travels over the arcuate flume which has a restriction 30 at its delivery end 28.
  • the effect of the restriction is to present a more condensed slubbing to the take up spool 12 increasing its tensile strength and avoiding breakages.
  • the frictional drive on the remainder of the slubbing 14 and contact with the flume 24 is created by the speed differential between the rubbing apron 16 and the take-up spool 12 in effect trying to straighten out the slubbing 14 over the arcuate section of the flume 24.
  • the frictional adjustment by means of the slubbing guide 32, is in effect infinitely variable by applying more or less slubbing to the surface of the flume 24.
  • the flumes 24 are formed by pressing or moulding from a continuous sheet 44 fixed to the raddle shaft 26 as before.
  • One advantage of this configuration apart from ease of manufacture, is that it aids threading up of broken slubbings since the free ends are retained on the sheet. Furthermore, should a slubbing accidentally move from its flume 24 it will be retained on the sheet 44 rather than get tangled up in the machinery and it will tend to move back into its proper flume 24 as the sheet is traversed.
  • the apparatus of the invention is considerably easier to thread up than the fingers of European patent publication 0181697 and furthermore provides continuous adjustment of tension. It thus provides the benefits of that apparatus without the disadvantages.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Inorganic Fibers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP87201296A 1986-07-09 1987-07-07 Improvements to carding process Expired - Lifetime EP0252569B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87201296T ATE100155T1 (de) 1986-07-09 1987-07-07 Kardierverfahren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868616728A GB8616728D0 (en) 1986-07-09 1986-07-09 Carding process
GB8616728 1986-07-09

Publications (3)

Publication Number Publication Date
EP0252569A2 EP0252569A2 (en) 1988-01-13
EP0252569A3 EP0252569A3 (en) 1990-04-18
EP0252569B1 true EP0252569B1 (en) 1994-01-12

Family

ID=10600789

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87201296A Expired - Lifetime EP0252569B1 (en) 1986-07-09 1987-07-07 Improvements to carding process

Country Status (7)

Country Link
EP (1) EP0252569B1 (da)
JP (1) JPS6366329A (da)
AT (1) ATE100155T1 (da)
DE (1) DE3788751D1 (da)
DK (1) DK170348B1 (da)
ES (1) ES2049212T3 (da)
GB (1) GB8616728D0 (da)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2520175Y2 (ja) * 1990-10-03 1996-12-11 アラコ株式会社 車両用シートのロック機構

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2750130A (en) * 1952-10-04 1956-06-12 Specialties Dev Corp Yarn tensioning device
JPS458339Y1 (da) * 1966-05-16 1970-04-20
CH559143A5 (da) * 1973-06-06 1975-02-28 Bleiche Ag
EP0181697A1 (en) * 1984-10-09 1986-05-21 Wool Research Organisation Of New Zealand Inc. Improvements to carding processes

Also Published As

Publication number Publication date
JPS6366329A (ja) 1988-03-25
ES2049212T3 (es) 1994-04-16
EP0252569A3 (en) 1990-04-18
EP0252569A2 (en) 1988-01-13
DK352987D0 (da) 1987-07-08
DK170348B1 (da) 1995-08-07
ATE100155T1 (de) 1994-01-15
DK352987A (da) 1988-01-10
GB8616728D0 (en) 1986-08-13
DE3788751D1 (de) 1994-02-24

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