EP0505410A1 - Improvements in and relating to wool carding. - Google Patents

Improvements in and relating to wool carding.

Info

Publication number
EP0505410A1
EP0505410A1 EP91900680A EP91900680A EP0505410A1 EP 0505410 A1 EP0505410 A1 EP 0505410A1 EP 91900680 A EP91900680 A EP 91900680A EP 91900680 A EP91900680 A EP 91900680A EP 0505410 A1 EP0505410 A1 EP 0505410A1
Authority
EP
European Patent Office
Prior art keywords
burr
morel
beater
card
wool
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.)
Granted
Application number
EP91900680A
Other languages
German (de)
French (fr)
Other versions
EP0505410A4 (en
EP0505410B1 (en
Inventor
Kenneth Ross Atkinson
Barry Valentine Harrowfield
Gary Alfred Robinson
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.)
Commonwealth Scientific and Industrial Research Organization CSIRO
Original Assignee
Commonwealth Scientific and Industrial Research Organization CSIRO
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 Commonwealth Scientific and Industrial Research Organization CSIRO filed Critical Commonwealth Scientific and Industrial Research Organization CSIRO
Publication of EP0505410A1 publication Critical patent/EP0505410A1/en
Publication of EP0505410A4 publication Critical patent/EP0505410A4/en
Application granted granted Critical
Publication of EP0505410B1 publication Critical patent/EP0505410B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • D01G15/94—Burr-crushing or removing arrangements
    • 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
    • D01G15/94—Burr-crushing or removing arrangements
    • D01G15/98—Morel or like apparatus

Definitions

  • This invention is concerned with the carding of wool and is concerned in one aspect with modifications of a wool card to facilitate the operation of the card at a speed substantially higher than conventional card speed.
  • worsted card productivity may be doubled or even tripled without detriment to sliver quality or card yield by simply substantially increasing the card speed above the conventional level (Gravolin et al, Proceedings of the Textile Institute Annual World Conference, Sydney, 1988,
  • French patent publication 2232626 discloses a VM removal unit in which
  • an enlarged morel roller accommodates a pair of burr-beaters separated by a reverse worker/ stripper carding unit which functions to invert the web on the
  • SUBSTITUTE SHEET morel mesh to bring the shives and burrs which lie on the inside of the web at the first burr-beater to the outside of the web for dislodgement by the second burr- beater.
  • the invention accordingly provides a wool card having at least one and preferably two burr-beater morel units for the removal of vegetable matter, characterised in that the morel roller of said at least one unit, or one or each of said units, is fitted with a plurality of burr-beaters, preferably two, arranged about the morel roller so that the fibre web is fed directly along the morel roller from one burr-beater to the other substantially without intervening inversion of the web or displacement of vegetable matter therein.
  • the wool card further includes a swift and an associated double doffer arrangement including a pair of doffer rollers by means of which the fibre web is doffed from the card.
  • the invention also provides a method of wool carding comprising directing a fibre web along a wool card which includes at least one burr-beater morel unit for the removal of vegetable matter, characterised in that the morel roller of said at least one burr-beater morel unit is fitted with a plurality of burr-beaters and in that said fibre web is fed directly along the morel roller from one burr-beater to the other substantially without intervening inversion of the web or displacement
  • the method preferably further includes doffing the fibre web from the card by double doffing the fibre web as two mats by means of a pair of doffer rollers associated with the swift of the card.
  • the illustrated card 10 is of known general configuration and comprises a series of main cylinders including, in sequence, a licker 14, a breast 18, a first morel 16, a second morel 20 and a swift 22.
  • the licker, breast and swift have the usual stripper /worker carding units 24 and doffing from the swift is achieved with a double doffer arrangement 26.
  • the fibre web is fed along the sequence of cylinders, doffed as two mats by the successive doffer rollers 26a, 26b, and then converged from the double doffer by a cone (not shown) to form sliver.
  • the double doffer which is in contrast to the single doffer conventionally found on wool cards, is found to be necessary if adequate doffing efficiency is to be achieved at card speeds substantially above normal speeds. It has also been found that double doffing helps overcome problems arising from increased layer thickness or fibre density at higher card speeds, and enhances card production rate or transfer efficiency by 10 to 25% relative to single doffing.
  • the morel rollers 16, 20 are respective components of a pair of vegetable matter removal units 15a, 15b which are depicted in a tandem configuration but may well be separated by one or more intervening rollers. Each morel roller is of conventional construction and has a cylindrical surface defined by a very fine mesh designed to accommodate the fibres of the web but to leave shives, burrs and other vegetable matter exposed.
  • a singe burr-beater 30a, 30b is disposed adjacent the surface mesh at the top of the roller and includes a longitudinally bladed hollow cylinder which rotates very rapidly and
  • each unit 15a, 15b is fitted with a second burr-beater 31a, 31b located between the take-up point on the morel and the other burr-beater 30a, 30b.
  • the two burr-beaters 31a, 30a; 31b, 30b of each pair are of substantially conventional construction and are typically identical, including the usual longitudinally bladed hollow cylinder and an adjacent longitudinally extending tray.
  • the morel rollers 16, 20 are typically made larger than is usual in current or previous carding practice, for example at least 450mm in diameter.
  • the fibre web is fed directly along each morel roller 16, 20 from the first burr-beater 31a, 31b to the second 30a, 30b. No intervening provision is made to invert the web or otherwise displace the vegetable matter among the fibres, as in French patent publication 2232626, or indeed to modify the web in any way.
  • the table also shows that the wool loss for the tandem burr-beaters is low and comparable to that of a morel after the first swift or licker. This suggests that wool loss should not be an impediment to operating tandem burr-beater pairs commercially.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Bedding Items (AREA)
  • Paper (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

A wool card has at least one burr-beater morel unit (15a, 15b) for the removal of vegetable matter, the morel roller (16, 20) of which is fitted with a plurality of burr-beaters (30, 31), preferably two, arranged about the morel roller (16, 20) so that, in operation of the card, the fibre web is fed directly along the morel roller from one burr-beater (31) to the other (30) substantially without intervening inversion of the web or displacement of vegetable matter in the web.

Description

IMPROVEMENTS IN AND RELATING TO WOOL CARDING
Field of the Invention
5 This invention is concerned with the carding of wool and is concerned in one aspect with modifications of a wool card to facilitate the operation of the card at a speed substantially higher than conventional card speed.
Background Art
10
It has been proposed that worsted card productivity may be doubled or even tripled without detriment to sliver quality or card yield by simply substantially increasing the card speed above the conventional level (Gravolin et al, Proceedings of the Textile Institute Annual World Conference, Sydney, 1988,
15 "Doubling or Even Tripling Worsted Card Productivity"). Experimental work with existing commercial cards has, however, shown a difficulty with vegetable matter (VM) removal efficiency, a role typically played by a pair of burr-beater morel units. Attempts to re-establish the VM removal efficiency by speeding up the burr beaters to match the increased speed of the morels are often not feasible
20 because of inherent resonance related limitations on the speed of the burr- beaters. The natural conclusion from these experiments, taking into account the inherent limitations just mentioned, is that the morel units simply cannot operate as efficiently at the higher speeds. One might expect this from a consideration of the manner of operation of the morel units: the morel rollers have a very fine
25 surface mesh of a special configuration which accommodates the fibres of a web but not the vegetable matter. The vegetable matter is left exposed for dislodgement by the blades of hollow burr-beater cylinders rotating at high speed adjacent the mesh.
French patent publication 2232626 discloses a VM removal unit in which
30 an enlarged morel roller accommodates a pair of burr-beaters separated by a reverse worker/ stripper carding unit which functions to invert the web on the
SUBSTITUTE SHEET morel mesh to bring the shives and burrs which lie on the inside of the web at the first burr-beater to the outside of the web for dislodgement by the second burr- beater.
Disclosure of the Invention
It has been surprisingly found, in accordance with the invention, that enhanced vegetable matter removal efficiency can be obtained by fitting one or both morel units of a card with a pair of burr-beaters in which the web travels directly from one burr-beater to the other without intervening treatment by a worker/stripper carding unit. It has been further found that, contrary to the expectation that vegetable matter removal efficiency must inevitably deteriorate with substantial increases in card speed, the provision of such an arrangement results in the restoration of VM removal efficiency to a value close to the efficiency of conventional cards working at conventional card speeds.
The invention accordingly provides a wool card having at least one and preferably two burr-beater morel units for the removal of vegetable matter, characterised in that the morel roller of said at least one unit, or one or each of said units, is fitted with a plurality of burr-beaters, preferably two, arranged about the morel roller so that the fibre web is fed directly along the morel roller from one burr-beater to the other substantially without intervening inversion of the web or displacement of vegetable matter therein.
Preferably, the wool card further includes a swift and an associated double doffer arrangement including a pair of doffer rollers by means of which the fibre web is doffed from the card.
The invention also provides a method of wool carding comprising directing a fibre web along a wool card which includes at least one burr-beater morel unit for the removal of vegetable matter, characterised in that the morel roller of said at least one burr-beater morel unit is fitted with a plurality of burr-beaters and in that said fibre web is fed directly along the morel roller from one burr-beater to the other substantially without intervening inversion of the web or displacement
SUBSTITUTE SHEET of vegetable matter therein.
The method preferably further includes doffing the fibre web from the card by double doffing the fibre web as two mats by means of a pair of doffer rollers associated with the swift of the card.
Best Mode s) For Carrying Out the Invention
The invention will now be further described, by way of example only, with reference to the accompanying drawing, which is a diagrammatic side elevation of a worsted card in accordance with the invention.
The illustrated card 10 is of known general configuration and comprises a series of main cylinders including, in sequence, a licker 14, a breast 18, a first morel 16, a second morel 20 and a swift 22. The licker, breast and swift have the usual stripper /worker carding units 24 and doffing from the swift is achieved with a double doffer arrangement 26. The fibre web is fed along the sequence of cylinders, doffed as two mats by the successive doffer rollers 26a, 26b, and then converged from the double doffer by a cone (not shown) to form sliver.
The double doffer, which is in contrast to the single doffer conventionally found on wool cards, is found to be necessary if adequate doffing efficiency is to be achieved at card speeds substantially above normal speeds. It has also been found that double doffing helps overcome problems arising from increased layer thickness or fibre density at higher card speeds, and enhances card production rate or transfer efficiency by 10 to 25% relative to single doffing. The morel rollers 16, 20 are respective components of a pair of vegetable matter removal units 15a, 15b which are depicted in a tandem configuration but may well be separated by one or more intervening rollers. Each morel roller is of conventional construction and has a cylindrical surface defined by a very fine mesh designed to accommodate the fibres of the web but to leave shives, burrs and other vegetable matter exposed. In conventional morels, a singe burr-beater 30a, 30b is disposed adjacent the surface mesh at the top of the roller and includes a longitudinally bladed hollow cylinder which rotates very rapidly and
SUBSTITUTE SHEET acts to sweep the exposed vegetable matter into an adjacent tray for recovery and disposal. In accordance with the present invention, however, each unit 15a, 15b is fitted with a second burr-beater 31a, 31b located between the take-up point on the morel and the other burr-beater 30a, 30b.
Most conveniently, the two burr-beaters 31a, 30a; 31b, 30b of each pair are of substantially conventional construction and are typically identical, including the usual longitudinally bladed hollow cylinder and an adjacent longitudinally extending tray. To physically accommodate the additional burr-beater, the morel rollers 16, 20 are typically made larger than is usual in current or previous carding practice, for example at least 450mm in diameter.
It will be noted that the fibre web is fed directly along each morel roller 16, 20 from the first burr-beater 31a, 31b to the second 30a, 30b. No intervening provision is made to invert the web or otherwise displace the vegetable matter among the fibres, as in French patent publication 2232626, or indeed to modify the web in any way.
Experiments have been conducted to ascertain the effect of a second burr- beater on the VM removal efficiency of a morel unit in a wool card operated at a card speed substantially above normal card speed. More specifically, a two swift Thibeau card was modified by substituting a 510 mm diameter morel roller for the roller of the second morel (normally 360 mm) and fitting two instead of one burr-beaters to this second morel. For the purposes of the experiment, the modified second morel was operated as a first morel by increasing the fibre loading to that of a normal first morel while disconnecting the first morel burr- beater. In a series of experiments, the morel roller was successfully operated at a normal speed of 95 m/min and at a substantially higher speed of 207 m/min. Two burr-beater speeds, 1200 and 2200 rpm were used. The results are summarised separately in Table 1 for shive and burr.
SUBSTITUTE SHEET TABLE 1
Carding Conditions Double BB Morel
The results demonstrate that the tandem burr beater pair maintains VM removal fairly constant in spite of large increases in card speed. It is thought that the second burr-beater of the pair is acting on surface vegetable matter missed by the first burr-beater, and that the expectation that failure to dislodge by one burr- beater will not be compensated for by a second burr-beater, is not supported by the results.
The table also shows that the wool loss for the tandem burr-beaters is low and comparable to that of a morel after the first swift or licker. This suggests that wool loss should not be an impediment to operating tandem burr-beater pairs commercially.
SUBSTITUTE SHEET

Claims

CLAIMS:
1. A wool card having at least one burr-beater morel unit for the removal of vegetable matter, characterised in that the morel roller of said at least one burr- beater morel unit is fitted with a plurality of burr-beaters, arranged about the morel roller so that, in operation of the card, the fibre web is fed directly along the morel roller from one burr-beater to the other substantially without intervening inversion of the web or displacement of vegetable matter therein.
2. A wool card according to claim 1 wherein said wool card has at least one further burr-beater morel unit.
3. A wool card according to claim 2 wherein said further burr-beater morel unit is also fitted with a plurality of burr-beaters arranged about the morel roller so that, in operation of the card, the fibre web is fed directly along the morel roller from one burr-beater to the other substantially without intervening inversion of the web or displacement of vegetable matter therein.
4. A wool card according to claim 3 wherein said burr-beater morel units fitted with a plurality of burr-beaters are arranged in tandem in the card.
5. A wool card according to any preceding claim wherein the or each burr- beater morel unit fitted with a plurality of burr-beaters is fitted with two burr- beaters.
6. A wool card according to any preceding claim further including a swift and an associated double doffer arrangement including a pair of doffer rollers by means of which the fibre web is doffed from the card.
7. A wool card according to any preceding claim wherein the morel roller of the or each burr-beater morel unit fitted with a plurality of burr-beaters is of diameter
SUBSTITUTE SHEET at least 450 mm.
8. A method of wool carding comprising directing a fibre web along a wool card which includes at least one burr-beater morel unit for the removal of vegetable matter, characterised in that the morel roller of said at least one burr-beater morel unit is fitted with a plurality of burr-beaters, and in that said fibre web is fed directly along the morel roller from one burr-beater to the other substantially without intervening inversion of the web or displacement of vegetable matter therein.
9. A method according to claim 8 further comprising doffing the fibre web from the card by double doffing the fibre web as two mats by means of a pair of doffer rollers associated with the swift of the card.
10. A wool card substantially as hereinbefore described with reference to the drawing.
11. A method of wool carding substantially as hereinbefore described with reference to the drawing.
SUBSTITUTE SHEET
EP91900680A 1989-12-13 1990-12-13 A woll card and a method of wool carding Expired - Lifetime EP0505410B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AU7840/89 1989-12-13
AUPJ784089 1989-12-13
PCT/AU1990/000589 WO1991009164A1 (en) 1989-12-13 1990-12-13 Improvements in and relating to wool carding

Publications (3)

Publication Number Publication Date
EP0505410A1 true EP0505410A1 (en) 1992-09-30
EP0505410A4 EP0505410A4 (en) 1992-10-07
EP0505410B1 EP0505410B1 (en) 1997-02-26

Family

ID=3774411

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91900680A Expired - Lifetime EP0505410B1 (en) 1989-12-13 1990-12-13 A woll card and a method of wool carding

Country Status (9)

Country Link
EP (1) EP0505410B1 (en)
JP (1) JPH05502697A (en)
AT (1) ATE149213T1 (en)
AU (1) AU637177B2 (en)
CA (1) CA2069497A1 (en)
DE (1) DE69030006T2 (en)
ES (1) ES2098343T3 (en)
NZ (1) NZ236454A (en)
WO (1) WO1991009164A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2677377B1 (en) * 1991-06-07 1994-05-20 Schlumberger Cie Sa N "WOOL" CARD.
FR2677378A1 (en) * 1991-06-07 1992-12-11 Schlumberger Cie N CARDE DITE "WOOL".
FR2705367B1 (en) * 1993-05-19 1995-06-30 Schlumberger Cie N Device for cleaning Morel cylinders on a card.
IT1280964B1 (en) * 1995-10-10 1998-02-11 Fonderie Officine Riunite F O DEVICE FOR THE EJECTION OF VEGETABLE IMPURITIES IN A WOOL CARD.
EP0770715A1 (en) 1995-10-27 1997-05-02 Commonwealth Scientific And Industrial Research Organisation Removal of contaminant waste in textile carding

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE150650C (en) * 1902-06-14
DE165596C (en) * 1903-12-12
FR406621A (en) * 1909-08-30 1910-02-04 Hubert Leopold Offermann Improvements to wool scouring devices
GB626713A (en) * 1946-08-15 1949-07-20 William Henry Dean Improvements in or relating to apparatus for the extraction of burrs and other foreign matter from wool and like textile fibres
GB892111A (en) * 1958-10-23 1962-03-21 Walter Helvitio Schneider Improvements in or relating to carding machines for jute, jute substitute fibres, hemp and flax

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2009282A (en) * 1932-07-08 1935-07-23 Thibeau Antoine Improved burring motion for treating wool and other textile fibers
FR2232626A1 (en) * 1973-06-07 1975-01-03 Schlumberger Cie N Morel type carding engine - includes main carding cylinder cooperating with card rolls and two trash removal rolls

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE150650C (en) * 1902-06-14
DE165596C (en) * 1903-12-12
FR406621A (en) * 1909-08-30 1910-02-04 Hubert Leopold Offermann Improvements to wool scouring devices
GB626713A (en) * 1946-08-15 1949-07-20 William Henry Dean Improvements in or relating to apparatus for the extraction of burrs and other foreign matter from wool and like textile fibres
GB892111A (en) * 1958-10-23 1962-03-21 Walter Helvitio Schneider Improvements in or relating to carding machines for jute, jute substitute fibres, hemp and flax

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9109164A1 *

Also Published As

Publication number Publication date
EP0505410A4 (en) 1992-10-07
JPH05502697A (en) 1993-05-13
ATE149213T1 (en) 1997-03-15
WO1991009164A1 (en) 1991-06-27
NZ236454A (en) 1991-10-25
DE69030006T2 (en) 1997-08-28
CA2069497A1 (en) 1991-06-14
EP0505410B1 (en) 1997-02-26
DE69030006D1 (en) 1997-04-03
ES2098343T3 (en) 1997-05-01
AU6910391A (en) 1991-07-18
AU637177B2 (en) 1993-05-20

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